From 3165ff3d95d46e3e8f091bc64ad88e7e52dd8a65 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Tue, 8 Mar 2016 00:53:53 -0800
Subject: [PATCH 001/280] Added compression spec

---
 doc/PROTOCOL-HTTP2.md |   4 +-
 doc/compression.md    | 105 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 107 insertions(+), 2 deletions(-)
 create mode 100644 doc/compression.md

diff --git a/doc/PROTOCOL-HTTP2.md b/doc/PROTOCOL-HTTP2.md
index 357ea72571b..31d694b803d 100644
--- a/doc/PROTOCOL-HTTP2.md
+++ b/doc/PROTOCOL-HTTP2.md
@@ -38,7 +38,7 @@ Request-Headers are delivered as HTTP2 headers in HEADERS + CONTINUATION frames.
 * **Nanosecond** → "n"
 * **Content-Type** → "content-type" "application/grpc" [("+proto" / "+json" / {_custom_})]
 * **Content-Coding** → "identity" / "gzip" / "deflate" / "snappy" / {_custom_}
-* **Message-Encoding** → "grpc-encoding" Content-Coding
+* <a name="message-encoding"></a>**Message-Encoding** → "grpc-encoding" Content-Coding
 * **Message-Accept-Encoding** → "grpc-accept-encoding" Content-Coding \*("," Content-Coding)
 * **User-Agent** → "user-agent" {_structured user-agent string_}
 * **Message-Type** → "grpc-message-type" {_type name for message schema_}
@@ -83,7 +83,7 @@ binary values' lengths being post-Base64.
 The repeated sequence of **Length-Prefixed-Message** items is delivered in DATA frames
 
 * **Length-Prefixed-Message** → Compressed-Flag Message-Length Message
-* **Compressed-Flag** → 0 / 1   # encoded as 1 byte unsigned integer
+* <a name="compressed-flag"></a>**Compressed-Flag** → 0 / 1   # encoded as 1 byte unsigned integer
 * **Message-Length** → {_length of Message_}  # encoded as 4 byte unsigned integer
 * **Message** → \*{binary octet}
 
diff --git a/doc/compression.md b/doc/compression.md
new file mode 100644
index 00000000000..ddbbff1c541
--- /dev/null
+++ b/doc/compression.md
@@ -0,0 +1,105 @@
+## **gRPC Compression**
+
+The keywords "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD",
+"SHOULD NOT", "RECOMMENDED",  "MAY", and "OPTIONAL" in this document are to be
+interpreted as described in [RFC 2119](http://www.ietf.org/rfc/rfc2119.txt).
+
+### Intent
+
+Compression is used to reduce the amount of bandwidth used between peers. The
+compression supported by gRPC acts _at the individual message level_, taking
+_message_ [as defined in the wire format
+document](PROTOCOL-HTTP2.md).
+
+The implementation supports different compression algorithms. A _default
+compression level_, to be used in the absence of message-specific settings, MAY
+be specified for during channel creation.
+
+The ability to control compression settings per call and to enable/disable
+compression on a per message basis MAY be used to prevent CRIME/BEAST attacks.
+It also allows for asymmetric compression communication, whereby a response MAY
+be compressed differently, if at all.
+
+### Specification
+
+Compression MAY be configured by the Client Application by calling the
+appropriate API method. There are two scenarios where compression MAY be
+configured:
+
++  At channel creation time, which sets the channel default compression and
+   therefore the compression that SHALL be used in the absence of per-RPC
+   compression configuration.
++  At response time, via:
+   +  For unary RPCs, the {Client,Server}Context instance. 
+   +  For streaming RPCs, the {Client,Server}Writer instance. In this case,
+      configuration is reduced to disabling compression altogether.
+
+### Compression Method Asymmetry Between Peers
+
+A gRPC peer MAY choose to respond using a different compression method to that
+of the request, including not performing any compression, regardless of channel
+and RPC settings (for example, if compression would result in small or negative
+gains).
+
+A compressed message from a client with an algorithm unsupported by a server,
+WILL result in an INVALID\_ARGUMENT error, alongside the receiving peer's
+`grpc-accept-encoding` header specifying the algorithms it accepts. If an
+INTERNAL error is returned from the server despite having used one of the
+algorithms from the `grpc-accept-encoding h`eader, the cause MUST NOT be related
+to compression. Data sent from a server compressed with an algorithm not
+supported by the client will also result in an INTERNAL error.
+
+Note that a peer MAY choose to not disclose all the encodings it supports.
+However, if it receives a message compressed in an undisclosed but supported
+encoding, it MUST include said encoding in the response's `grpc-accept-encoding
+h`eader.
+
+For every message a server is requested to compress using an algorithm it knows
+the client doesn't support (as indicated by the last `grpc-accept-encoding`
+header received from the client), it SHALL send the message uncompressed. 
+
+### Specific Disabling of Compression
+
+If the user (through the previously described mechanisms) requests to disable
+compression the next message MUST be sent uncompressed. This is instrumental in
+preventing BEAST/CRIME attacks. This applies to both the the unary and streaming
+cases.
+
+### Compression Levels and Algorithms
+
+We currently (as of July 2015) support _gzip_ and _deflate_ as algorithms (with
+the possible future addition of snappy). In order to simplify the public API,
+it's intended to abstract the algorithms as _compression levels_ (such as "low",
+"medium", "high") that'd map to concrete algorithms and/or their settings (such
+as "low" mapping to "gzip -3" and "high" mapping to "gzip -9"). However, we
+can't presently (July 2015) implement said compression levels at the client side
+without either a initial negotiation of capabilities or an automatic retry
+mechanism. Therefore, compression levels are only supported at the server side,
+which is aware of the client's capabilities by virtue of the incoming
+Message-Accept-Encoding header.
+
+### Propagation to child RPCs
+
+The inheritance of the compression configuration by child RPCs is left up to the
+implementation. Note that in the absence of changes to the parent channel, its
+configuration will be used.
+
+### Test cases
+
+1. When a compression level is not specified for either the channel or the
+message, the default channel level _none_ is considered: data MUST NOT be
+compressed.
+1. When per-RPC compression configuration isn't present for a message, the
+channel compression configuration MUST be used.
+1. When a compression method (including no compression) is specified for an
+outgoing message, the message MUST be compressed accordingly.
+1. A message compressed in a way not supported by its endpoint MUST fail with
+INVALID\_ARGUMENT status, its associated description indicating the unsupported
+condition as well as the supported ones. The returned `grpc-accept-encoding`
+header MUST NOT contain the compression method (encoding) used.
+1. An ill-constructed message with its [Compressed-Flag
+bit](PROTOCOL-HTTP2.md#compressed-flag)
+set but lacking a
+"[grpc-encoding](PROTOCOL-HTTP2.md#message-encoding)"
+entry different from _identity_ in its metadata MUST fail with INTERNAL status,
+its associated description indicating the invalid Compressed-Flag condition.

From 9a4d0893881f6811646695cc73fe9752fed308ae Mon Sep 17 00:00:00 2001
From: Yosuke Ishikawa <y@ishkawa.org>
Date: Fri, 29 Apr 2016 01:05:39 +0900
Subject: [PATCH 002/280] Fix build error caused by immutability of value type

---
 src/objective-c/examples/SwiftSample/ViewController.swift | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/objective-c/examples/SwiftSample/ViewController.swift b/src/objective-c/examples/SwiftSample/ViewController.swift
index a21ce07978d..80d7a47917f 100644
--- a/src/objective-c/examples/SwiftSample/ViewController.swift
+++ b/src/objective-c/examples/SwiftSample/ViewController.swift
@@ -71,7 +71,7 @@ class ViewController: UIViewController {
       NSLog("2. Response trailers: \(RPC.responseTrailers)")
     }
 
-    RPC.requestHeaders["My-Header"] = "My value"
+    RPC.requestHeaders.setObject("My value", forKey: "My-Header")
 
     RPC.start()
 
@@ -84,7 +84,7 @@ class ViewController: UIViewController {
 
     let call = GRPCCall(host: RemoteHost, path: method.HTTPPath, requestsWriter: requestsWriter)
 
-    call.requestHeaders["My-Header"] = "My value"
+    call.requestHeaders.setObject("My value", forKey: "My-Header")
 
     call.startWithWriteable(GRXWriteable { response, error in
       if let response = response as? NSData {

From 454432542a6cc6145621003ecd8303c82a4e2b7b Mon Sep 17 00:00:00 2001
From: Jorge Canizales <jcanizales@google.com>
Date: Fri, 29 Apr 2016 16:19:51 -0700
Subject: [PATCH 003/280] Add a maybe-temporary way for apps to clear the
 channel cache

---
 .../GRPCClient/GRPCCall+ChannelArg.h          |  5 +++++
 .../GRPCClient/GRPCCall+ChannelArg.m          |  4 ++++
 src/objective-c/GRPCClient/private/GRPCHost.h |  2 ++
 src/objective-c/GRPCClient/private/GRPCHost.m | 21 ++++++++++++++-----
 4 files changed, 27 insertions(+), 5 deletions(-)

diff --git a/src/objective-c/GRPCClient/GRPCCall+ChannelArg.h b/src/objective-c/GRPCClient/GRPCCall+ChannelArg.h
index bd6b064f166..646bf43b547 100644
--- a/src/objective-c/GRPCClient/GRPCCall+ChannelArg.h
+++ b/src/objective-c/GRPCClient/GRPCCall+ChannelArg.h
@@ -32,6 +32,8 @@
  */
 #import "GRPCCall.h"
 
+#include <AvailabilityMacros.h>
+
 /**
  * Methods to configure GRPC channel options.
  */
@@ -43,4 +45,7 @@
  */
 + (void)setUserAgentPrefix:(NSString *)userAgentPrefix forHost:(NSString *)host;
 
++ (void)closeOpenConnections DEPRECATED_MSG_ATTRIBUTE("The API for this feature is experimental, "
+                                                      "and might be removed or modified at any "
+                                                      "time.");
 @end
diff --git a/src/objective-c/GRPCClient/GRPCCall+ChannelArg.m b/src/objective-c/GRPCClient/GRPCCall+ChannelArg.m
index 5f9932d86dc..bcc3b915075 100644
--- a/src/objective-c/GRPCClient/GRPCCall+ChannelArg.m
+++ b/src/objective-c/GRPCClient/GRPCCall+ChannelArg.m
@@ -46,4 +46,8 @@
   hostConfig.userAgentPrefix = userAgentPrefix;
 }
 
++ (void)closeOpenConnections {
+  [GRPCHost flushChannelCache];
+}
+
 @end
diff --git a/src/objective-c/GRPCClient/private/GRPCHost.h b/src/objective-c/GRPCClient/private/GRPCHost.h
index 9220e2a33db..350c69bf8e8 100644
--- a/src/objective-c/GRPCClient/private/GRPCHost.h
+++ b/src/objective-c/GRPCClient/private/GRPCHost.h
@@ -41,6 +41,8 @@ struct grpc_channel_credentials;
 
 @interface GRPCHost : NSObject
 
++ (void)flushChannelCache;
+
 @property(nonatomic, readonly) NSString *address;
 @property(nonatomic, copy, nullable) NSString *userAgentPrefix;
 @property(nonatomic, nullable) struct grpc_channel_credentials *channelCreds;
diff --git a/src/objective-c/GRPCClient/private/GRPCHost.m b/src/objective-c/GRPCClient/private/GRPCHost.m
index 43166cbb527..0358cc62365 100644
--- a/src/objective-c/GRPCClient/private/GRPCHost.m
+++ b/src/objective-c/GRPCClient/private/GRPCHost.m
@@ -48,6 +48,8 @@ NS_ASSUME_NONNULL_BEGIN
 // templates/src/core/surface/version.c.template .
 #define GRPC_OBJC_VERSION_STRING @"0.13.0"
 
+static NSMutableDictionary *kHostCache;
+
 @implementation GRPCHost {
   // TODO(mlumish): Investigate whether caching channels with strong links is a good idea.
   GRPCChannel *_channel;
@@ -79,13 +81,12 @@ NS_ASSUME_NONNULL_BEGIN
   }
 
   // Look up the GRPCHost in the cache.
-  static NSMutableDictionary *hostCache;
   static dispatch_once_t cacheInitialization;
   dispatch_once(&cacheInitialization, ^{
-    hostCache = [NSMutableDictionary dictionary];
+    kHostCache = [NSMutableDictionary dictionary];
   });
-  @synchronized(hostCache) {
-    GRPCHost *cachedHost = hostCache[address];
+  @synchronized(kHostCache) {
+    GRPCHost *cachedHost = kHostCache[address];
     if (cachedHost) {
       return cachedHost;
     }
@@ -93,12 +94,22 @@ NS_ASSUME_NONNULL_BEGIN
     if ((self = [super init])) {
       _address = address;
       _secure = YES;
-      hostCache[address] = self;
+      kHostCache[address] = self;
     }
   }
   return self;
 }
 
++ (void)flushChannelCache {
+  @synchronized(kHostCache) {
+    [kHostCache enumerateKeysAndObjectsUsingBlock:^(id  _Nonnull key,
+                                                    GRPCHost * _Nonnull host,
+                                                    BOOL * _Nonnull stop) {
+      [host disconnect];
+    }];
+  }
+}
+
 - (nullable grpc_call *)unmanagedCallWithPath:(NSString *)path
                               completionQueue:(GRPCCompletionQueue *)queue {
   GRPCChannel *channel;

From fa70dacf95b93486b7dfe0c21ada90d75a5d5bcd Mon Sep 17 00:00:00 2001
From: Jorge Canizales <jcanizales@google.com>
Date: Fri, 29 Apr 2016 19:58:52 -0700
Subject: [PATCH 004/280] =?UTF-8?q?Smoke=20test=20that=20things=20still=20?=
 =?UTF-8?q?work=20after=20=E2=80=9CcloseOpenConnections=E2=80=9D?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/objective-c/tests/InteropTests.m | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/src/objective-c/tests/InteropTests.m b/src/objective-c/tests/InteropTests.m
index 26877b1ae84..379271a312d 100644
--- a/src/objective-c/tests/InteropTests.m
+++ b/src/objective-c/tests/InteropTests.m
@@ -35,6 +35,7 @@
 
 #include <grpc/status.h>
 
+#import <GRPCClient/GRPCCall+ChannelArg.h>
 #import <GRPCClient/GRPCCall+Tests.h>
 #import <ProtoRPC/ProtoRPC.h>
 #import <RemoteTest/Empty.pbobjc.h>
@@ -312,4 +313,25 @@
   [self waitForExpectationsWithTimeout:8 handler:nil];
 }
 
+- (void)testRPCAfterClosingOpenConnections {
+  XCTAssertNotNil(self.class.host);
+  __weak XCTestExpectation *expectation =
+      [self expectationWithDescription:@"RPC after closing connection"];
+
+  RMTEmpty *request = [RMTEmpty message];
+
+  [_service emptyCallWithRequest:request handler:^(RMTEmpty *response, NSError *error) {
+    XCTAssertNil(error, @"First RPC finished with unexpected error: %@", error);
+
+    [GRPCCall closeOpenConnections];
+
+    [_service emptyCallWithRequest:request handler:^(RMTEmpty *response, NSError *error) {
+      XCTAssertNil(error, @"Second RPC finished with unexpected error: %@", error);
+      [expectation fulfill];
+    }];
+  }];
+
+  [self waitForExpectationsWithTimeout:4 handler:nil];
+}
+
 @end

From 2e3c9ad6dd6fbf4f7532eedd9d5d2b52e7a3eb1f Mon Sep 17 00:00:00 2001
From: Julien Boeuf <jboeuf@google.com>
Date: Tue, 19 Jan 2016 17:14:38 -0800
Subject: [PATCH 005/280] Starting the work to fix #3803.

- We still need a way to bubble up this error.
---
 src/core/lib/security/client_auth_filter.c    |  3 +-
 src/core/lib/security/credentials.c           | 35 +++++++------
 src/core/lib/security/credentials.h           |  4 +-
 test/core/security/credentials_test.c         | 49 ++++++++++---------
 test/core/security/oauth2_utils.c             |  3 +-
 .../print_google_default_creds_token.c        |  3 +-
 6 files changed, 54 insertions(+), 43 deletions(-)

diff --git a/src/core/lib/security/client_auth_filter.c b/src/core/lib/security/client_auth_filter.c
index 8b58cb86bf9..f6de877021e 100644
--- a/src/core/lib/security/client_auth_filter.c
+++ b/src/core/lib/security/client_auth_filter.c
@@ -98,7 +98,8 @@ static void bubble_up_error(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
 static void on_credentials_metadata(grpc_exec_ctx *exec_ctx, void *user_data,
                                     grpc_credentials_md *md_elems,
                                     size_t num_md,
-                                    grpc_credentials_status status) {
+                                    grpc_credentials_status status,
+                                    const char *error_details) {
   grpc_call_element *elem = (grpc_call_element *)user_data;
   call_data *calld = elem->call_data;
   grpc_transport_stream_op *op = &calld->op;
diff --git a/src/core/lib/security/credentials.c b/src/core/lib/security/credentials.c
index fd5ad3589b7..1c9832333aa 100644
--- a/src/core/lib/security/credentials.c
+++ b/src/core/lib/security/credentials.c
@@ -122,7 +122,7 @@ void grpc_call_credentials_get_request_metadata(
     grpc_credentials_metadata_cb cb, void *user_data) {
   if (creds == NULL || creds->vtable->get_request_metadata == NULL) {
     if (cb != NULL) {
-      cb(exec_ctx, user_data, NULL, 0, GRPC_CREDENTIALS_OK);
+      cb(exec_ctx, user_data, NULL, 0, GRPC_CREDENTIALS_OK, NULL);
     }
     return;
   }
@@ -497,10 +497,10 @@ static void jwt_get_request_metadata(grpc_exec_ctx *exec_ctx,
 
   if (jwt_md != NULL) {
     cb(exec_ctx, user_data, jwt_md->entries, jwt_md->num_entries,
-       GRPC_CREDENTIALS_OK);
+       GRPC_CREDENTIALS_OK, NULL);
     grpc_credentials_md_store_unref(jwt_md);
   } else {
-    cb(exec_ctx, user_data, NULL, 0, GRPC_CREDENTIALS_ERROR);
+    cb(exec_ctx, user_data, NULL, 0, GRPC_CREDENTIALS_ERROR, "");
   }
 }
 
@@ -660,10 +660,10 @@ static void on_oauth2_token_fetcher_http_response(
     c->token_expiration =
         gpr_time_add(gpr_now(GPR_CLOCK_REALTIME), token_lifetime);
     r->cb(exec_ctx, r->user_data, c->access_token_md->entries,
-          c->access_token_md->num_entries, status);
+          c->access_token_md->num_entries, status, NULL);
   } else {
     c->token_expiration = gpr_inf_past(GPR_CLOCK_REALTIME);
-    r->cb(exec_ctx, r->user_data, NULL, 0, status);
+    r->cb(exec_ctx, r->user_data, NULL, 0, status, "");
   }
   gpr_mu_unlock(&c->mu);
   grpc_credentials_metadata_request_destroy(r);
@@ -691,7 +691,7 @@ static void oauth2_token_fetcher_get_request_metadata(
   }
   if (cached_access_token_md != NULL) {
     cb(exec_ctx, user_data, cached_access_token_md->entries,
-       cached_access_token_md->num_entries, GRPC_CREDENTIALS_OK);
+       cached_access_token_md->num_entries, GRPC_CREDENTIALS_OK, NULL);
     grpc_credentials_md_store_unref(cached_access_token_md);
   } else {
     c->fetch_func(
@@ -821,7 +821,7 @@ static void on_simulated_token_fetch_done(grpc_exec_ctx *exec_ctx,
       (grpc_credentials_metadata_request *)user_data;
   grpc_md_only_test_credentials *c = (grpc_md_only_test_credentials *)r->creds;
   r->cb(exec_ctx, r->user_data, c->md_store->entries, c->md_store->num_entries,
-        GRPC_CREDENTIALS_OK);
+        GRPC_CREDENTIALS_OK, NULL);
   grpc_credentials_metadata_request_destroy(r);
 }
 
@@ -837,7 +837,7 @@ static void md_only_test_get_request_metadata(
     grpc_executor_enqueue(
         grpc_closure_create(on_simulated_token_fetch_done, cb_arg), true);
   } else {
-    cb(exec_ctx, user_data, c->md_store->entries, 1, GRPC_CREDENTIALS_OK);
+    cb(exec_ctx, user_data, c->md_store->entries, 1, GRPC_CREDENTIALS_OK, NULL);
   }
 }
 
@@ -870,7 +870,8 @@ static void access_token_get_request_metadata(
     grpc_pollset *pollset, grpc_auth_metadata_context context,
     grpc_credentials_metadata_cb cb, void *user_data) {
   grpc_access_token_credentials *c = (grpc_access_token_credentials *)creds;
-  cb(exec_ctx, user_data, c->access_token_md->entries, 1, GRPC_CREDENTIALS_OK);
+  cb(exec_ctx, user_data, c->access_token_md->entries, 1, GRPC_CREDENTIALS_OK,
+     NULL);
 }
 
 static grpc_call_credentials_vtable access_token_vtable = {
@@ -973,11 +974,12 @@ static void composite_call_md_context_destroy(
 static void composite_call_metadata_cb(grpc_exec_ctx *exec_ctx, void *user_data,
                                        grpc_credentials_md *md_elems,
                                        size_t num_md,
-                                       grpc_credentials_status status) {
+                                       grpc_credentials_status status,
+                                       const char *error_details) {
   grpc_composite_call_credentials_metadata_context *ctx =
       (grpc_composite_call_credentials_metadata_context *)user_data;
   if (status != GRPC_CREDENTIALS_OK) {
-    ctx->cb(exec_ctx, ctx->user_data, NULL, 0, status);
+    ctx->cb(exec_ctx, ctx->user_data, NULL, 0, status, NULL);
     return;
   }
 
@@ -1002,7 +1004,7 @@ static void composite_call_metadata_cb(grpc_exec_ctx *exec_ctx, void *user_data,
 
   /* We're done!. */
   ctx->cb(exec_ctx, ctx->user_data, ctx->md_elems->entries,
-          ctx->md_elems->num_entries, GRPC_CREDENTIALS_OK);
+          ctx->md_elems->num_entries, GRPC_CREDENTIALS_OK, NULL);
   composite_call_md_context_destroy(ctx);
 }
 
@@ -1122,7 +1124,7 @@ static void iam_get_request_metadata(grpc_exec_ctx *exec_ctx,
                                      void *user_data) {
   grpc_google_iam_credentials *c = (grpc_google_iam_credentials *)creds;
   cb(exec_ctx, user_data, c->iam_md->entries, c->iam_md->num_entries,
-     GRPC_CREDENTIALS_OK);
+     GRPC_CREDENTIALS_OK, NULL);
 }
 
 static grpc_call_credentials_vtable iam_vtable = {iam_destruct,
@@ -1178,7 +1180,8 @@ static void plugin_md_request_metadata_ready(void *request,
       gpr_log(GPR_ERROR, "Getting metadata from plugin failed with error: %s",
               error_details);
     }
-    r->cb(&exec_ctx, r->user_data, NULL, 0, GRPC_CREDENTIALS_ERROR);
+    r->cb(&exec_ctx, r->user_data, NULL, 0, GRPC_CREDENTIALS_ERROR,
+          error_details);
   } else {
     size_t i;
     grpc_credentials_md *md_array = NULL;
@@ -1190,7 +1193,7 @@ static void plugin_md_request_metadata_ready(void *request,
             gpr_slice_from_copied_buffer(md[i].value, md[i].value_length);
       }
     }
-    r->cb(&exec_ctx, r->user_data, md_array, num_md, GRPC_CREDENTIALS_OK);
+    r->cb(&exec_ctx, r->user_data, md_array, num_md, GRPC_CREDENTIALS_OK, NULL);
     if (md_array != NULL) {
       for (i = 0; i < num_md; i++) {
         gpr_slice_unref(md_array[i].key);
@@ -1218,7 +1221,7 @@ static void plugin_get_request_metadata(grpc_exec_ctx *exec_ctx,
     c->plugin.get_metadata(c->plugin.state, context,
                            plugin_md_request_metadata_ready, request);
   } else {
-    cb(exec_ctx, user_data, NULL, 0, GRPC_CREDENTIALS_OK);
+    cb(exec_ctx, user_data, NULL, 0, GRPC_CREDENTIALS_OK, NULL);
   }
 }
 
diff --git a/src/core/lib/security/credentials.h b/src/core/lib/security/credentials.h
index 0373ceaa3fc..412b6e48fc9 100644
--- a/src/core/lib/security/credentials.h
+++ b/src/core/lib/security/credentials.h
@@ -160,11 +160,13 @@ void grpc_credentials_md_store_unref(grpc_credentials_md_store *store);
 
 /* --- grpc_call_credentials. --- */
 
+/* error_details must be NULL if status is GRPC_CREDENTIALS_OK. */
 typedef void (*grpc_credentials_metadata_cb)(grpc_exec_ctx *exec_ctx,
                                              void *user_data,
                                              grpc_credentials_md *md_elems,
                                              size_t num_md,
-                                             grpc_credentials_status status);
+                                             grpc_credentials_status status,
+                                             const char *error_details);
 
 typedef struct {
   void (*destruct)(grpc_call_credentials *c);
diff --git a/test/core/security/credentials_test.c b/test/core/security/credentials_test.c
index 78672932787..36a4fdae14e 100644
--- a/test/core/security/credentials_test.c
+++ b/test/core/security/credentials_test.c
@@ -338,13 +338,15 @@ static void check_metadata(expected_md *expected, grpc_credentials_md *md_elems,
 static void check_google_iam_metadata(grpc_exec_ctx *exec_ctx, void *user_data,
                                       grpc_credentials_md *md_elems,
                                       size_t num_md,
-                                      grpc_credentials_status status) {
+                                      grpc_credentials_status status,
+                                      const char *error_details) {
   grpc_call_credentials *c = (grpc_call_credentials *)user_data;
   expected_md emd[] = {{GRPC_IAM_AUTHORIZATION_TOKEN_METADATA_KEY,
                         test_google_iam_authorization_token},
                        {GRPC_IAM_AUTHORITY_SELECTOR_METADATA_KEY,
                         test_google_iam_authority_selector}};
   GPR_ASSERT(status == GRPC_CREDENTIALS_OK);
+  GPR_ASSERT(error_details == NULL);
   GPR_ASSERT(num_md == 2);
   check_metadata(emd, md_elems, num_md);
   grpc_call_credentials_unref(c);
@@ -362,14 +364,13 @@ static void test_google_iam_creds(void) {
   grpc_exec_ctx_finish(&exec_ctx);
 }
 
-static void check_access_token_metadata(grpc_exec_ctx *exec_ctx,
-                                        void *user_data,
-                                        grpc_credentials_md *md_elems,
-                                        size_t num_md,
-                                        grpc_credentials_status status) {
+static void check_access_token_metadata(
+    grpc_exec_ctx *exec_ctx, void *user_data, grpc_credentials_md *md_elems,
+    size_t num_md, grpc_credentials_status status, const char *error_details) {
   grpc_call_credentials *c = (grpc_call_credentials *)user_data;
   expected_md emd[] = {{GRPC_AUTHORIZATION_METADATA_KEY, "Bearer blah"}};
   GPR_ASSERT(status == GRPC_CREDENTIALS_OK);
+  GPR_ASSERT(error_details == NULL);
   GPR_ASSERT(num_md == 1);
   check_metadata(emd, md_elems, num_md);
   grpc_call_credentials_unref(c);
@@ -418,7 +419,7 @@ static void test_channel_oauth2_composite_creds(void) {
 
 static void check_oauth2_google_iam_composite_metadata(
     grpc_exec_ctx *exec_ctx, void *user_data, grpc_credentials_md *md_elems,
-    size_t num_md, grpc_credentials_status status) {
+    size_t num_md, grpc_credentials_status status, const char *error_details) {
   grpc_call_credentials *c = (grpc_call_credentials *)user_data;
   expected_md emd[] = {
       {GRPC_AUTHORIZATION_METADATA_KEY, test_oauth2_bearer_token},
@@ -427,6 +428,7 @@ static void check_oauth2_google_iam_composite_metadata(
       {GRPC_IAM_AUTHORITY_SELECTOR_METADATA_KEY,
        test_google_iam_authority_selector}};
   GPR_ASSERT(status == GRPC_CREDENTIALS_OK);
+  GPR_ASSERT(error_details == NULL);
   GPR_ASSERT(num_md == 3);
   check_metadata(emd, md_elems, num_md);
   grpc_call_credentials_unref(c);
@@ -511,8 +513,9 @@ static void test_channel_oauth2_google_iam_composite_creds(void) {
 
 static void on_oauth2_creds_get_metadata_success(
     grpc_exec_ctx *exec_ctx, void *user_data, grpc_credentials_md *md_elems,
-    size_t num_md, grpc_credentials_status status) {
+    size_t num_md, grpc_credentials_status status, const char *error_details) {
   GPR_ASSERT(status == GRPC_CREDENTIALS_OK);
+  GPR_ASSERT(error_details == NULL);
   GPR_ASSERT(num_md == 1);
   GPR_ASSERT(gpr_slice_str_cmp(md_elems[0].key, "authorization") == 0);
   GPR_ASSERT(gpr_slice_str_cmp(md_elems[0].value,
@@ -524,7 +527,7 @@ static void on_oauth2_creds_get_metadata_success(
 
 static void on_oauth2_creds_get_metadata_failure(
     grpc_exec_ctx *exec_ctx, void *user_data, grpc_credentials_md *md_elems,
-    size_t num_md, grpc_credentials_status status) {
+    size_t num_md, grpc_credentials_status status, const char *error_details) {
   GPR_ASSERT(status == GRPC_CREDENTIALS_ERROR);
   GPR_ASSERT(num_md == 0);
   GPR_ASSERT(user_data != NULL);
@@ -760,14 +763,13 @@ static char *encode_and_sign_jwt_should_not_be_called(
   return NULL;
 }
 
-static void on_jwt_creds_get_metadata_success(grpc_exec_ctx *exec_ctx,
-                                              void *user_data,
-                                              grpc_credentials_md *md_elems,
-                                              size_t num_md,
-                                              grpc_credentials_status status) {
+static void on_jwt_creds_get_metadata_success(
+    grpc_exec_ctx *exec_ctx, void *user_data, grpc_credentials_md *md_elems,
+    size_t num_md, grpc_credentials_status status, const char *error_details) {
   char *expected_md_value;
   gpr_asprintf(&expected_md_value, "Bearer %s", test_signed_jwt);
   GPR_ASSERT(status == GRPC_CREDENTIALS_OK);
+  GPR_ASSERT(error_details == NULL);
   GPR_ASSERT(num_md == 1);
   GPR_ASSERT(gpr_slice_str_cmp(md_elems[0].key, "authorization") == 0);
   GPR_ASSERT(gpr_slice_str_cmp(md_elems[0].value, expected_md_value) == 0);
@@ -776,11 +778,9 @@ static void on_jwt_creds_get_metadata_success(grpc_exec_ctx *exec_ctx,
   gpr_free(expected_md_value);
 }
 
-static void on_jwt_creds_get_metadata_failure(grpc_exec_ctx *exec_ctx,
-                                              void *user_data,
-                                              grpc_credentials_md *md_elems,
-                                              size_t num_md,
-                                              grpc_credentials_status status) {
+static void on_jwt_creds_get_metadata_failure(
+    grpc_exec_ctx *exec_ctx, void *user_data, grpc_credentials_md *md_elems,
+    size_t num_md, grpc_credentials_status status, const char *error_details) {
   GPR_ASSERT(status == GRPC_CREDENTIALS_ERROR);
   GPR_ASSERT(num_md == 0);
   GPR_ASSERT(user_data != NULL);
@@ -1024,6 +1024,8 @@ static void plugin_get_metadata_success(void *state,
   cb(user_data, md, GPR_ARRAY_SIZE(md), GRPC_STATUS_OK, NULL);
 }
 
+static const char *plugin_error_details = "Could not get metadata for plugin.";
+
 static void plugin_get_metadata_failure(void *state,
                                         grpc_auth_metadata_context context,
                                         grpc_credentials_plugin_metadata_cb cb,
@@ -1034,13 +1036,12 @@ static void plugin_get_metadata_failure(void *state,
   GPR_ASSERT(context.channel_auth_context == NULL);
   GPR_ASSERT(context.reserved == NULL);
   *s = PLUGIN_GET_METADATA_CALLED_STATE;
-  cb(user_data, NULL, 0, GRPC_STATUS_UNAUTHENTICATED,
-     "Could not get metadata for plugin.");
+  cb(user_data, NULL, 0, GRPC_STATUS_UNAUTHENTICATED, plugin_error_details);
 }
 
 static void on_plugin_metadata_received_success(
     grpc_exec_ctx *exec_ctx, void *user_data, grpc_credentials_md *md_elems,
-    size_t num_md, grpc_credentials_status status) {
+    size_t num_md, grpc_credentials_status status, const char *error_details) {
   size_t i = 0;
   GPR_ASSERT(user_data == NULL);
   GPR_ASSERT(md_elems != NULL);
@@ -1053,11 +1054,13 @@ static void on_plugin_metadata_received_success(
 
 static void on_plugin_metadata_received_failure(
     grpc_exec_ctx *exec_ctx, void *user_data, grpc_credentials_md *md_elems,
-    size_t num_md, grpc_credentials_status status) {
+    size_t num_md, grpc_credentials_status status, const char *error_details) {
   GPR_ASSERT(user_data == NULL);
   GPR_ASSERT(md_elems == NULL);
   GPR_ASSERT(num_md == 0);
   GPR_ASSERT(status == GRPC_CREDENTIALS_ERROR);
+  GPR_ASSERT(error_details != NULL);
+  GPR_ASSERT(strcmp(error_details, plugin_error_details) == 0);
 }
 
 static void plugin_destroy(void *state) {
diff --git a/test/core/security/oauth2_utils.c b/test/core/security/oauth2_utils.c
index 20815d184cd..10155fccf59 100644
--- a/test/core/security/oauth2_utils.c
+++ b/test/core/security/oauth2_utils.c
@@ -53,7 +53,8 @@ typedef struct {
 
 static void on_oauth2_response(grpc_exec_ctx *exec_ctx, void *user_data,
                                grpc_credentials_md *md_elems, size_t num_md,
-                               grpc_credentials_status status) {
+                               grpc_credentials_status status,
+                               const char *error_details) {
   oauth2_request *request = user_data;
   char *token = NULL;
   gpr_slice token_slice;
diff --git a/test/core/security/print_google_default_creds_token.c b/test/core/security/print_google_default_creds_token.c
index 99bce4fbdfb..be900d84498 100644
--- a/test/core/security/print_google_default_creds_token.c
+++ b/test/core/security/print_google_default_creds_token.c
@@ -53,7 +53,8 @@ typedef struct {
 
 static void on_metadata_response(grpc_exec_ctx *exec_ctx, void *user_data,
                                  grpc_credentials_md *md_elems, size_t num_md,
-                                 grpc_credentials_status status) {
+                                 grpc_credentials_status status,
+                                 const char *error_details) {
   synchronizer *sync = user_data;
   if (status == GRPC_CREDENTIALS_ERROR) {
     fprintf(stderr, "Fetching token failed.\n");

From ef96264d8724a71f4f1fef5ebaf361d28b1a1752 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Wed, 18 May 2016 22:57:17 -0700
Subject: [PATCH 006/280] Support SO_REUSEPORT

---
 include/grpc/impl/codegen/grpc_types.h        |   2 +
 .../chttp2/server/insecure/server_chttp2.c    |   3 +-
 .../server/secure/server_secure_chttp2.c      |   3 +-
 .../lib/iomgr/socket_utils_common_posix.c     |  22 ++++
 src/core/lib/iomgr/socket_utils_posix.h       |   3 +
 src/core/lib/iomgr/tcp_server.h               |   3 +
 src/core/lib/iomgr/tcp_server_posix.c         | 122 ++++++++++++++++--
 7 files changed, 143 insertions(+), 15 deletions(-)

diff --git a/include/grpc/impl/codegen/grpc_types.h b/include/grpc/impl/codegen/grpc_types.h
index af3d0c21916..cd3cae71b6a 100644
--- a/include/grpc/impl/codegen/grpc_types.h
+++ b/include/grpc/impl/codegen/grpc_types.h
@@ -154,6 +154,8 @@ typedef struct {
 #define GRPC_SSL_TARGET_NAME_OVERRIDE_ARG "grpc.ssl_target_name_override"
 /* Maximum metadata size */
 #define GRPC_ARG_MAX_METADATA_SIZE "grpc.max_metadata_size"
+/** If non-zero, allow the use of SO_REUSEPORT if it's available (default 1) */
+#define GRPC_ARG_ALLOW_REUSEPORT "grpc.so_reuseport"
 
 /** Result of a grpc call. If the caller satisfies the prerequisites of a
     particular operation, the grpc_call_error returned will be GRPC_CALL_OK.
diff --git a/src/core/ext/transport/chttp2/server/insecure/server_chttp2.c b/src/core/ext/transport/chttp2/server/insecure/server_chttp2.c
index d1a58b66211..08a09a933a6 100644
--- a/src/core/ext/transport/chttp2/server/insecure/server_chttp2.c
+++ b/src/core/ext/transport/chttp2/server/insecure/server_chttp2.c
@@ -102,7 +102,8 @@ int grpc_server_add_insecure_http2_port(grpc_server *server, const char *addr) {
     goto error;
   }
 
-  err = grpc_tcp_server_create(NULL, &tcp);
+  err =
+      grpc_tcp_server_create(NULL, grpc_server_get_channel_args(server), &tcp);
   if (err != GRPC_ERROR_NONE) {
     goto error;
   }
diff --git a/src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c b/src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c
index 629959b7c03..64162cc7857 100644
--- a/src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c
+++ b/src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c
@@ -208,7 +208,8 @@ int grpc_server_add_secure_http2_port(grpc_server *server, const char *addr,
   state = gpr_malloc(sizeof(*state));
   memset(state, 0, sizeof(*state));
   grpc_closure_init(&state->destroy_closure, destroy_done, state);
-  err = grpc_tcp_server_create(&state->destroy_closure, &tcp);
+  err = grpc_tcp_server_create(&state->destroy_closure,
+                               grpc_server_get_channel_args(server), &tcp);
   if (err != GRPC_ERROR_NONE) {
     goto error;
   }
diff --git a/src/core/lib/iomgr/socket_utils_common_posix.c b/src/core/lib/iomgr/socket_utils_common_posix.c
index d1721c910c4..bd8ef00c859 100644
--- a/src/core/lib/iomgr/socket_utils_common_posix.c
+++ b/src/core/lib/iomgr/socket_utils_common_posix.c
@@ -154,6 +154,28 @@ grpc_error *grpc_set_socket_reuse_addr(int fd, int reuse) {
   return GRPC_ERROR_NONE;
 }
 
+/* set a socket to reuse old addresses */
+grpc_error *grpc_set_socket_reuse_port(int fd, int reuse) {
+#ifndef SO_REUSEPORT
+  return GRPC_ERROR_CREATE("SO_REUSEPORT unavailable on compiling system");
+#else
+  int val = (reuse != 0);
+  int newval;
+  socklen_t intlen = sizeof(newval);
+  if (0 != setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &val, sizeof(val))) {
+    return GRPC_OS_ERROR(errno, "setsockopt(SO_REUSEPORT)");
+  }
+  if (0 != getsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &newval, &intlen)) {
+    return GRPC_OS_ERROR(errno, "getsockopt(SO_REUSEPORT)");
+  }
+  if ((newval != 0) != val) {
+    return GRPC_ERROR_CREATE("Failed to set SO_REUSEPORT");
+  }
+
+  return GRPC_ERROR_NONE;
+#endif
+}
+
 /* disable nagle */
 grpc_error *grpc_set_socket_low_latency(int fd, int low_latency) {
   int val = (low_latency != 0);
diff --git a/src/core/lib/iomgr/socket_utils_posix.h b/src/core/lib/iomgr/socket_utils_posix.h
index 4e66cbc0c58..607fbc7a791 100644
--- a/src/core/lib/iomgr/socket_utils_posix.h
+++ b/src/core/lib/iomgr/socket_utils_posix.h
@@ -55,6 +55,9 @@ grpc_error *grpc_set_socket_reuse_addr(int fd, int reuse);
 /* disable nagle */
 grpc_error *grpc_set_socket_low_latency(int fd, int low_latency);
 
+/* set SO_REUSEPORT */
+grpc_error *grpc_set_socket_reuse_port(int fd, int reuse);
+
 /* Returns true if this system can create AF_INET6 sockets bound to ::1.
    The value is probed once, and cached for the life of the process.
 
diff --git a/src/core/lib/iomgr/tcp_server.h b/src/core/lib/iomgr/tcp_server.h
index 924121f0c79..79f0242b26d 100644
--- a/src/core/lib/iomgr/tcp_server.h
+++ b/src/core/lib/iomgr/tcp_server.h
@@ -34,6 +34,8 @@
 #ifndef GRPC_CORE_LIB_IOMGR_TCP_SERVER_H
 #define GRPC_CORE_LIB_IOMGR_TCP_SERVER_H
 
+#include <grpc/grpc.h>
+
 #include "src/core/lib/iomgr/closure.h"
 #include "src/core/lib/iomgr/endpoint.h"
 
@@ -58,6 +60,7 @@ typedef void (*grpc_tcp_server_cb)(grpc_exec_ctx *exec_ctx, void *arg,
    If shutdown_complete is not NULL, it will be used by
    grpc_tcp_server_unref() when the ref count reaches zero. */
 grpc_error *grpc_tcp_server_create(grpc_closure *shutdown_complete,
+                                   const grpc_channel_args *args,
                                    grpc_tcp_server **server);
 
 /* Start listening to bound ports */
diff --git a/src/core/lib/iomgr/tcp_server_posix.c b/src/core/lib/iomgr/tcp_server_posix.c
index db70fada96a..7047934780b 100644
--- a/src/core/lib/iomgr/tcp_server_posix.c
+++ b/src/core/lib/iomgr/tcp_server_posix.c
@@ -112,8 +112,10 @@ struct grpc_tcp_server {
   /* destroyed port count: how many ports are completely destroyed */
   size_t destroyed_ports;
 
-  /* is this server shutting down? (boolean) */
-  int shutdown;
+  /* is this server shutting down? */
+  bool shutdown;
+  /* use SO_REUSEPORT */
+  bool so_reuseport;
 
   /* linked list of server ports */
   grpc_tcp_listener *head;
@@ -132,14 +134,42 @@ struct grpc_tcp_server {
   size_t pollset_count;
 };
 
+static gpr_once check_init = GPR_ONCE_INIT;
+static bool has_so_reuseport;
+
+static void init(void) {
+  int s = socket(AF_INET, SOCK_STREAM, 0);
+  if (s >= 0) {
+    has_so_reuseport = GRPC_LOG_IF_ERROR("check for SO_REUSEPORT",
+                                         grpc_set_socket_reuse_port(s, 1));
+    close(s);
+  }
+}
+
 grpc_error *grpc_tcp_server_create(grpc_closure *shutdown_complete,
+                                   const grpc_channel_args *args,
                                    grpc_tcp_server **server) {
+  gpr_once_init(&check_init, init);
+
   grpc_tcp_server *s = gpr_malloc(sizeof(grpc_tcp_server));
+  s->so_reuseport = has_so_reuseport;
+  for (size_t i = 0; i < (args == NULL ? 0 : args->num_args); i++) {
+    if (0 == strcmp(GRPC_ARG_ALLOW_REUSEPORT, args->args[i].key)) {
+      if (args->args[i].type == GRPC_ARG_INTEGER) {
+        s->so_reuseport =
+            has_so_reuseport && (args->args[i].value.integer != 0);
+      } else {
+        gpr_free(s);
+        return GRPC_ERROR_CREATE(GRPC_ARG_ALLOW_REUSEPORT
+                                 " must be an integer");
+      }
+    }
+  }
   gpr_ref_init(&s->refs, 1);
   gpr_mu_init(&s->mu);
   s->active_ports = 0;
   s->destroyed_ports = 0;
-  s->shutdown = 0;
+  s->shutdown = false;
   s->shutdown_starting.head = NULL;
   s->shutdown_starting.tail = NULL;
   s->shutdown_complete = shutdown_complete;
@@ -214,7 +244,7 @@ static void tcp_server_destroy(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
   gpr_mu_lock(&s->mu);
 
   GPR_ASSERT(!s->shutdown);
-  s->shutdown = 1;
+  s->shutdown = true;
 
   /* shutdown all fd's */
   if (s->active_ports) {
@@ -264,13 +294,19 @@ static int get_max_accept_queue_size(void) {
 
 /* Prepare a recently-created socket for listening. */
 static grpc_error *prepare_socket(int fd, const struct sockaddr *addr,
-                                  size_t addr_len, int *port) {
+                                  size_t addr_len, bool so_reuseport,
+                                  int *port) {
   struct sockaddr_storage sockname_temp;
   socklen_t sockname_len;
   grpc_error *err = GRPC_ERROR_NONE;
 
   GPR_ASSERT(fd >= 0);
 
+  if (so_reuseport) {
+    err = grpc_set_socket_reuse_port(fd, 1);
+    if (err != GRPC_ERROR_NONE) goto error;
+  }
+
   err = grpc_set_socket_nonblocking(fd, 1);
   if (err != GRPC_ERROR_NONE) goto error;
   err = grpc_set_socket_cloexec(fd, 1);
@@ -397,7 +433,7 @@ static grpc_error *add_socket_to_server(grpc_tcp_server *s, int fd,
   char *addr_str;
   char *name;
 
-  grpc_error *err = prepare_socket(fd, addr, addr_len, &port);
+  grpc_error *err = prepare_socket(fd, addr, addr_len, s->so_reuseport, &port);
   if (err == GRPC_ERROR_NONE) {
     GPR_ASSERT(port > 0);
     grpc_sockaddr_to_string(&addr_str, (struct sockaddr *)&addr, 1);
@@ -433,6 +469,51 @@ static grpc_error *add_socket_to_server(grpc_tcp_server *s, int fd,
   return err;
 }
 
+static grpc_error *clone_port(grpc_tcp_listener *listener, unsigned count) {
+  grpc_tcp_listener *sp = NULL;
+  char *addr_str;
+  char *name;
+  grpc_error *err;
+
+  for (grpc_tcp_listener *l = listener->next; l && l->is_sibling; l = l->next) {
+    l->fd_index += count;
+  }
+
+  for (unsigned i = 0; i < count; i++) {
+    int fd, port;
+    grpc_dualstack_mode dsmode;
+    err = grpc_create_dualstack_socket(&listener->addr.sockaddr, SOCK_STREAM, 0,
+                                       &dsmode, &fd);
+    if (err != GRPC_ERROR_NONE) return err;
+    err = prepare_socket(fd, &listener->addr.sockaddr, listener->addr_len, true,
+                         &port);
+    if (err != GRPC_ERROR_NONE) return err;
+    grpc_sockaddr_to_string(&addr_str, &listener->addr.sockaddr, 1);
+    gpr_asprintf(&name, "tcp-server-listener:%s/clone-%d", addr_str, i);
+    sp = gpr_malloc(sizeof(grpc_tcp_listener));
+    sp->next = listener->next;
+    listener->next = sp;
+    sp->server = listener->server;
+    sp->fd = fd;
+    sp->emfd = grpc_fd_create(fd, name);
+    memcpy(sp->addr.untyped, listener->addr.untyped, listener->addr_len);
+    sp->addr_len = listener->addr_len;
+    sp->port = port;
+    sp->port_index = listener->port_index;
+    sp->fd_index = listener->fd_index + count - i;
+    sp->is_sibling = 1;
+    sp->sibling = listener->is_sibling ? listener->sibling : listener;
+    GPR_ASSERT(sp->emfd);
+    while (listener->server->tail->next != NULL) {
+      listener->server->tail = listener->server->tail->next;
+    }
+    gpr_free(addr_str);
+    gpr_free(name);
+  }
+
+  return GRPC_ERROR_NONE;
+}
+
 grpc_error *grpc_tcp_server_add_port(grpc_tcp_server *s, const void *addr,
                                      size_t addr_len, int *out_port) {
   grpc_tcp_listener *sp;
@@ -589,14 +670,29 @@ void grpc_tcp_server_start(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s,
   s->on_accept_cb_arg = on_accept_cb_arg;
   s->pollsets = pollsets;
   s->pollset_count = pollset_count;
-  for (sp = s->head; sp; sp = sp->next) {
-    for (i = 0; i < pollset_count; i++) {
-      grpc_pollset_add_fd(exec_ctx, pollsets[i], sp->emfd);
+  sp = s->head;
+  while (sp != NULL) {
+    if (s->so_reuseport && pollset_count > 1) {
+      GPR_ASSERT(GRPC_LOG_IF_ERROR(
+          "clone_port", clone_port(sp, (unsigned)(pollset_count - 1))));
+      for (i = 0; i < pollset_count; i++) {
+        grpc_pollset_add_fd(exec_ctx, pollsets[i], sp->emfd);
+        sp->read_closure.cb = on_read;
+        sp->read_closure.cb_arg = sp;
+        grpc_fd_notify_on_read(exec_ctx, sp->emfd, &sp->read_closure);
+        s->active_ports++;
+        sp = sp->next;
+      }
+    } else {
+      for (i = 0; i < pollset_count; i++) {
+        grpc_pollset_add_fd(exec_ctx, pollsets[i], sp->emfd);
+      }
+      sp->read_closure.cb = on_read;
+      sp->read_closure.cb_arg = sp;
+      grpc_fd_notify_on_read(exec_ctx, sp->emfd, &sp->read_closure);
+      s->active_ports++;
+      sp = sp->next;
     }
-    sp->read_closure.cb = on_read;
-    sp->read_closure.cb_arg = sp;
-    grpc_fd_notify_on_read(exec_ctx, sp->emfd, &sp->read_closure);
-    s->active_ports++;
   }
   gpr_mu_unlock(&s->mu);
 }

From c49464de3ed6108956561128b006c78777bd6db7 Mon Sep 17 00:00:00 2001
From: Julien Boeuf <jboeuf@google.com>
Date: Wed, 18 May 2016 23:11:50 -0700
Subject: [PATCH 007/280] replacing cancel op by close op in order to plumb
 error message.

---
 src/core/lib/security/client_auth_filter.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/core/lib/security/client_auth_filter.c b/src/core/lib/security/client_auth_filter.c
index f6de877021e..3908b734a27 100644
--- a/src/core/lib/security/client_auth_filter.c
+++ b/src/core/lib/security/client_auth_filter.c
@@ -91,7 +91,8 @@ static void bubble_up_error(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
                             grpc_status_code status, const char *error_msg) {
   call_data *calld = elem->call_data;
   gpr_log(GPR_ERROR, "Client side authentication failure: %s", error_msg);
-  grpc_transport_stream_op_add_cancellation(&calld->op, status);
+  gpr_slice error_slice = gpr_slice_from_copied_string(error_msg);
+  grpc_transport_stream_op_add_close(&calld->op, status, &error_slice);
   grpc_call_next_op(exec_ctx, elem, &calld->op);
 }
 
@@ -108,7 +109,9 @@ static void on_credentials_metadata(grpc_exec_ctx *exec_ctx, void *user_data,
   reset_auth_metadata_context(&calld->auth_md_context);
   if (status != GRPC_CREDENTIALS_OK) {
     bubble_up_error(exec_ctx, elem, GRPC_STATUS_UNAUTHENTICATED,
-                    "Credentials failed to get metadata.");
+                    (error_details != NULL && strlen(error_details) > 0)
+                        ? error_details
+                        : "Credentials failed to get metadata.");
     return;
   }
   GPR_ASSERT(num_md <= MAX_CREDENTIALS_METADATA_COUNT);

From 644da9857300151b27a1f297c40d971597a0845f Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Thu, 19 May 2016 09:19:28 -0700
Subject: [PATCH 008/280] Fixes

---
 src/core/lib/iomgr/tcp_server_posix.c            |  1 +
 test/core/iomgr/tcp_server_posix_test.c          | 10 +++++-----
 test/core/surface/concurrent_connectivity_test.c |  2 +-
 test/core/surface/server_chttp2_test.c           |  8 +++++++-
 test/core/surface/server_test.c                  | 10 ++++++++--
 test/core/util/test_tcp_server.c                 |  2 +-
 third_party/protobuf                             |  2 +-
 7 files changed, 24 insertions(+), 11 deletions(-)

diff --git a/src/core/lib/iomgr/tcp_server_posix.c b/src/core/lib/iomgr/tcp_server_posix.c
index 7047934780b..83627e59d9d 100644
--- a/src/core/lib/iomgr/tcp_server_posix.c
+++ b/src/core/lib/iomgr/tcp_server_posix.c
@@ -488,6 +488,7 @@ static grpc_error *clone_port(grpc_tcp_listener *listener, unsigned count) {
     err = prepare_socket(fd, &listener->addr.sockaddr, listener->addr_len, true,
                          &port);
     if (err != GRPC_ERROR_NONE) return err;
+    listener->server->nports++;
     grpc_sockaddr_to_string(&addr_str, &listener->addr.sockaddr, 1);
     gpr_asprintf(&name, "tcp-server-listener:%s/clone-%d", addr_str, i);
     sp = gpr_malloc(sizeof(grpc_tcp_listener));
diff --git a/test/core/iomgr/tcp_server_posix_test.c b/test/core/iomgr/tcp_server_posix_test.c
index a37ff1773b2..54437f6a9bd 100644
--- a/test/core/iomgr/tcp_server_posix_test.c
+++ b/test/core/iomgr/tcp_server_posix_test.c
@@ -128,7 +128,7 @@ static void on_connect(grpc_exec_ctx *exec_ctx, void *arg, grpc_endpoint *tcp,
 static void test_no_op(void) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_tcp_server *s;
-  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, &s));
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, NULL, &s));
   grpc_tcp_server_unref(&exec_ctx, s);
   grpc_exec_ctx_finish(&exec_ctx);
 }
@@ -136,7 +136,7 @@ static void test_no_op(void) {
 static void test_no_op_with_start(void) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_tcp_server *s;
-  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, &s));
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, NULL, &s));
   LOG_TEST("test_no_op_with_start");
   grpc_tcp_server_start(&exec_ctx, s, NULL, 0, on_connect, NULL);
   grpc_tcp_server_unref(&exec_ctx, s);
@@ -147,7 +147,7 @@ static void test_no_op_with_port(void) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   struct sockaddr_in addr;
   grpc_tcp_server *s;
-  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, &s));
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, NULL, &s));
   LOG_TEST("test_no_op_with_port");
 
   memset(&addr, 0, sizeof(addr));
@@ -165,7 +165,7 @@ static void test_no_op_with_port_and_start(void) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   struct sockaddr_in addr;
   grpc_tcp_server *s;
-  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, &s));
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, NULL,  &s));
   LOG_TEST("test_no_op_with_port_and_start");
   int port;
 
@@ -225,7 +225,7 @@ static void test_connect(unsigned n) {
   unsigned svr1_fd_count;
   int svr1_port;
   grpc_tcp_server *s;
-  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, &s));
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, NULL, &s));
   unsigned i;
   server_weak_ref weak_ref;
   server_weak_ref_init(&weak_ref);
diff --git a/test/core/surface/concurrent_connectivity_test.c b/test/core/surface/concurrent_connectivity_test.c
index 74e3183c26b..6d7d0413b28 100644
--- a/test/core/surface/concurrent_connectivity_test.c
+++ b/test/core/surface/concurrent_connectivity_test.c
@@ -112,7 +112,7 @@ void bad_server_thread(void *vargs) {
   socklen_t addr_len = sizeof(addr);
   int port;
   grpc_tcp_server *s;
-  grpc_error *error = grpc_tcp_server_create(NULL, &s);
+  grpc_error *error = grpc_tcp_server_create(NULL, NULL, &s);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   memset(&addr, 0, sizeof(addr));
   addr.ss_family = AF_INET;
diff --git a/test/core/surface/server_chttp2_test.c b/test/core/surface/server_chttp2_test.c
index f42ca9f9cdf..40cfa6b5989 100644
--- a/test/core/surface/server_chttp2_test.c
+++ b/test/core/surface/server_chttp2_test.c
@@ -49,10 +49,16 @@ void test_unparsable_target(void) {
 }
 
 void test_add_same_port_twice() {
+  grpc_arg a;
+  a.type = GRPC_ARG_INTEGER;
+  a.key = GRPC_ARG_ALLOW_REUSEPORT;
+  a.value.integer = 0;
+  grpc_channel_args args = {1, &a};
+  
   int port = grpc_pick_unused_port_or_die();
   char *addr = NULL;
   grpc_completion_queue *cq = grpc_completion_queue_create(NULL);
-  grpc_server *server = grpc_server_create(NULL, NULL);
+  grpc_server *server = grpc_server_create(&args, NULL);
   grpc_server_credentials *fake_creds =
       grpc_fake_transport_security_server_credentials_create();
   gpr_join_host_port(&addr, "localhost", port);
diff --git a/test/core/surface/server_test.c b/test/core/surface/server_test.c
index 3d2e25379a0..d1e646a9f15 100644
--- a/test/core/surface/server_test.c
+++ b/test/core/surface/server_test.c
@@ -76,9 +76,15 @@ void test_request_call_on_no_server_cq(void) {
 }
 
 void test_bind_server_twice(void) {
+  grpc_arg a;
+  a.type = GRPC_ARG_INTEGER;
+  a.key = GRPC_ARG_ALLOW_REUSEPORT;
+  a.value.integer = 0;
+  grpc_channel_args args = {1, &a};
+
   char *addr;
-  grpc_server *server1 = grpc_server_create(NULL, NULL);
-  grpc_server *server2 = grpc_server_create(NULL, NULL);
+  grpc_server *server1 = grpc_server_create(&args, NULL);
+  grpc_server *server2 = grpc_server_create(&args, NULL);
   grpc_completion_queue *cq = grpc_completion_queue_create(NULL);
   int port = grpc_pick_unused_port_or_die();
   gpr_asprintf(&addr, "[::]:%d", port);
diff --git a/test/core/util/test_tcp_server.c b/test/core/util/test_tcp_server.c
index 27c16fc764a..c1d307fc779 100644
--- a/test/core/util/test_tcp_server.c
+++ b/test/core/util/test_tcp_server.c
@@ -73,7 +73,7 @@ void test_tcp_server_start(test_tcp_server *server, int port) {
   memset(&addr.sin_addr, 0, sizeof(addr.sin_addr));
 
   grpc_error *error =
-      grpc_tcp_server_create(&server->shutdown_complete, &server->tcp_server);
+      grpc_tcp_server_create(&server->shutdown_complete, NULL, &server->tcp_server);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   error = grpc_tcp_server_add_port(server->tcp_server, &addr, sizeof(addr),
                                    &port_added);
diff --git a/third_party/protobuf b/third_party/protobuf
index a1938b2aa9c..d5fb408ddc2 160000
--- a/third_party/protobuf
+++ b/third_party/protobuf
@@ -1 +1 @@
-Subproject commit a1938b2aa9ca86ce7ce50c27ff9737c1008d2a03
+Subproject commit d5fb408ddc281ffcadeb08699e65bb694656d0bd

From e48b1bc011e2b5783ce75f4122dfd5aba01f0d97 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Wed, 11 May 2016 15:17:22 -0700
Subject: [PATCH 009/280] Base changes. Create ev_epoll_posix.{c,h} files by
 making a copy of ev_poll_and_epoll.c file

---
 BUILD                                         |    6 +
 Makefile                                      |    2 +
 binding.gyp                                   |    1 +
 build.yaml                                    |    2 +
 config.m4                                     |    1 +
 gRPC.podspec                                  |    3 +
 grpc.gemspec                                  |    2 +
 package.xml                                   |    2 +
 src/core/lib/iomgr/ev_epoll_posix.c           | 1733 +++++++++++++++++
 src/core/lib/iomgr/ev_epoll_posix.h           |   41 +
 src/core/lib/iomgr/ev_posix.c                 |    3 +-
 src/python/grpcio/grpc_core_dependencies.py   |    1 +
 tools/doxygen/Doxyfile.core.internal          |    2 +
 tools/run_tests/sources_and_headers.json      |    3 +
 vsprojects/vcxproj/grpc/grpc.vcxproj          |    3 +
 vsprojects/vcxproj/grpc/grpc.vcxproj.filters  |    6 +
 .../grpc_unsecure/grpc_unsecure.vcxproj       |    3 +
 .../grpc_unsecure.vcxproj.filters             |    6 +
 18 files changed, 1819 insertions(+), 1 deletion(-)
 create mode 100644 src/core/lib/iomgr/ev_epoll_posix.c
 create mode 100644 src/core/lib/iomgr/ev_epoll_posix.h

diff --git a/BUILD b/BUILD
index fd03d52e3cb..0be8f27a01b 100644
--- a/BUILD
+++ b/BUILD
@@ -178,6 +178,7 @@ cc_library(
     "src/core/lib/iomgr/closure.h",
     "src/core/lib/iomgr/endpoint.h",
     "src/core/lib/iomgr/endpoint_pair.h",
+    "src/core/lib/iomgr/ev_epoll_posix.h",
     "src/core/lib/iomgr/ev_poll_posix.h",
     "src/core/lib/iomgr/ev_posix.h",
     "src/core/lib/iomgr/exec_ctx.h",
@@ -321,6 +322,7 @@ cc_library(
     "src/core/lib/iomgr/endpoint.c",
     "src/core/lib/iomgr/endpoint_pair_posix.c",
     "src/core/lib/iomgr/endpoint_pair_windows.c",
+    "src/core/lib/iomgr/ev_epoll_posix.c",
     "src/core/lib/iomgr/ev_poll_posix.c",
     "src/core/lib/iomgr/ev_posix.c",
     "src/core/lib/iomgr/exec_ctx.c",
@@ -546,6 +548,7 @@ cc_library(
     "src/core/lib/iomgr/closure.h",
     "src/core/lib/iomgr/endpoint.h",
     "src/core/lib/iomgr/endpoint_pair.h",
+    "src/core/lib/iomgr/ev_epoll_posix.h",
     "src/core/lib/iomgr/ev_poll_posix.h",
     "src/core/lib/iomgr/ev_posix.h",
     "src/core/lib/iomgr/exec_ctx.h",
@@ -666,6 +669,7 @@ cc_library(
     "src/core/lib/iomgr/endpoint.c",
     "src/core/lib/iomgr/endpoint_pair_posix.c",
     "src/core/lib/iomgr/endpoint_pair_windows.c",
+    "src/core/lib/iomgr/ev_epoll_posix.c",
     "src/core/lib/iomgr/ev_poll_posix.c",
     "src/core/lib/iomgr/ev_posix.c",
     "src/core/lib/iomgr/exec_ctx.c",
@@ -1358,6 +1362,7 @@ objc_library(
     "src/core/lib/iomgr/endpoint.c",
     "src/core/lib/iomgr/endpoint_pair_posix.c",
     "src/core/lib/iomgr/endpoint_pair_windows.c",
+    "src/core/lib/iomgr/ev_epoll_posix.c",
     "src/core/lib/iomgr/ev_poll_posix.c",
     "src/core/lib/iomgr/ev_posix.c",
     "src/core/lib/iomgr/exec_ctx.c",
@@ -1562,6 +1567,7 @@ objc_library(
     "src/core/lib/iomgr/closure.h",
     "src/core/lib/iomgr/endpoint.h",
     "src/core/lib/iomgr/endpoint_pair.h",
+    "src/core/lib/iomgr/ev_epoll_posix.h",
     "src/core/lib/iomgr/ev_poll_posix.h",
     "src/core/lib/iomgr/ev_posix.h",
     "src/core/lib/iomgr/exec_ctx.h",
diff --git a/Makefile b/Makefile
index 817fcd072d7..29ebc0e5adf 100644
--- a/Makefile
+++ b/Makefile
@@ -2486,6 +2486,7 @@ LIBGRPC_SRC = \
     src/core/lib/iomgr/endpoint.c \
     src/core/lib/iomgr/endpoint_pair_posix.c \
     src/core/lib/iomgr/endpoint_pair_windows.c \
+    src/core/lib/iomgr/ev_epoll_posix.c \
     src/core/lib/iomgr/ev_poll_posix.c \
     src/core/lib/iomgr/ev_posix.c \
     src/core/lib/iomgr/exec_ctx.c \
@@ -2840,6 +2841,7 @@ LIBGRPC_UNSECURE_SRC = \
     src/core/lib/iomgr/endpoint.c \
     src/core/lib/iomgr/endpoint_pair_posix.c \
     src/core/lib/iomgr/endpoint_pair_windows.c \
+    src/core/lib/iomgr/ev_epoll_posix.c \
     src/core/lib/iomgr/ev_poll_posix.c \
     src/core/lib/iomgr/ev_posix.c \
     src/core/lib/iomgr/exec_ctx.c \
diff --git a/binding.gyp b/binding.gyp
index 7b187070005..89774ead4da 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -581,6 +581,7 @@
         'src/core/lib/iomgr/endpoint.c',
         'src/core/lib/iomgr/endpoint_pair_posix.c',
         'src/core/lib/iomgr/endpoint_pair_windows.c',
+        'src/core/lib/iomgr/ev_epoll_posix.c',
         'src/core/lib/iomgr/ev_poll_posix.c',
         'src/core/lib/iomgr/ev_posix.c',
         'src/core/lib/iomgr/exec_ctx.c',
diff --git a/build.yaml b/build.yaml
index 429dbb3351a..7ba65332972 100644
--- a/build.yaml
+++ b/build.yaml
@@ -165,6 +165,7 @@ filegroups:
   - src/core/lib/iomgr/closure.h
   - src/core/lib/iomgr/endpoint.h
   - src/core/lib/iomgr/endpoint_pair.h
+  - src/core/lib/iomgr/ev_epoll_posix.h
   - src/core/lib/iomgr/ev_poll_posix.h
   - src/core/lib/iomgr/ev_posix.h
   - src/core/lib/iomgr/exec_ctx.h
@@ -239,6 +240,7 @@ filegroups:
   - src/core/lib/iomgr/endpoint.c
   - src/core/lib/iomgr/endpoint_pair_posix.c
   - src/core/lib/iomgr/endpoint_pair_windows.c
+  - src/core/lib/iomgr/ev_epoll_posix.c
   - src/core/lib/iomgr/ev_poll_posix.c
   - src/core/lib/iomgr/ev_posix.c
   - src/core/lib/iomgr/exec_ctx.c
diff --git a/config.m4 b/config.m4
index 29df77ce1db..6987c741541 100644
--- a/config.m4
+++ b/config.m4
@@ -100,6 +100,7 @@ if test "$PHP_GRPC" != "no"; then
     src/core/lib/iomgr/endpoint.c \
     src/core/lib/iomgr/endpoint_pair_posix.c \
     src/core/lib/iomgr/endpoint_pair_windows.c \
+    src/core/lib/iomgr/ev_epoll_posix.c \
     src/core/lib/iomgr/ev_poll_posix.c \
     src/core/lib/iomgr/ev_posix.c \
     src/core/lib/iomgr/exec_ctx.c \
diff --git a/gRPC.podspec b/gRPC.podspec
index cc8ba3de94e..3b4dd52380e 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -181,6 +181,7 @@ Pod::Spec.new do |s|
                       'src/core/lib/iomgr/closure.h',
                       'src/core/lib/iomgr/endpoint.h',
                       'src/core/lib/iomgr/endpoint_pair.h',
+                      'src/core/lib/iomgr/ev_epoll_posix.h',
                       'src/core/lib/iomgr/ev_poll_posix.h',
                       'src/core/lib/iomgr/ev_posix.h',
                       'src/core/lib/iomgr/exec_ctx.h',
@@ -358,6 +359,7 @@ Pod::Spec.new do |s|
                       'src/core/lib/iomgr/endpoint.c',
                       'src/core/lib/iomgr/endpoint_pair_posix.c',
                       'src/core/lib/iomgr/endpoint_pair_windows.c',
+                      'src/core/lib/iomgr/ev_epoll_posix.c',
                       'src/core/lib/iomgr/ev_poll_posix.c',
                       'src/core/lib/iomgr/ev_posix.c',
                       'src/core/lib/iomgr/exec_ctx.c',
@@ -546,6 +548,7 @@ Pod::Spec.new do |s|
                               'src/core/lib/iomgr/closure.h',
                               'src/core/lib/iomgr/endpoint.h',
                               'src/core/lib/iomgr/endpoint_pair.h',
+                              'src/core/lib/iomgr/ev_epoll_posix.h',
                               'src/core/lib/iomgr/ev_poll_posix.h',
                               'src/core/lib/iomgr/ev_posix.h',
                               'src/core/lib/iomgr/exec_ctx.h',
diff --git a/grpc.gemspec b/grpc.gemspec
index ae7f9b7d2ee..71cccb6ca8d 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -190,6 +190,7 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/lib/iomgr/closure.h )
   s.files += %w( src/core/lib/iomgr/endpoint.h )
   s.files += %w( src/core/lib/iomgr/endpoint_pair.h )
+  s.files += %w( src/core/lib/iomgr/ev_epoll_posix.h )
   s.files += %w( src/core/lib/iomgr/ev_poll_posix.h )
   s.files += %w( src/core/lib/iomgr/ev_posix.h )
   s.files += %w( src/core/lib/iomgr/exec_ctx.h )
@@ -337,6 +338,7 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/lib/iomgr/endpoint.c )
   s.files += %w( src/core/lib/iomgr/endpoint_pair_posix.c )
   s.files += %w( src/core/lib/iomgr/endpoint_pair_windows.c )
+  s.files += %w( src/core/lib/iomgr/ev_epoll_posix.c )
   s.files += %w( src/core/lib/iomgr/ev_poll_posix.c )
   s.files += %w( src/core/lib/iomgr/ev_posix.c )
   s.files += %w( src/core/lib/iomgr/exec_ctx.c )
diff --git a/package.xml b/package.xml
index 507a2a7ed6c..0fc5d0dee47 100644
--- a/package.xml
+++ b/package.xml
@@ -197,6 +197,7 @@
     <file baseinstalldir="/" name="src/core/lib/iomgr/closure.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/endpoint.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/endpoint_pair.h" role="src" />
+    <file baseinstalldir="/" name="src/core/lib/iomgr/ev_epoll_posix.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/ev_poll_posix.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/ev_posix.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/exec_ctx.h" role="src" />
@@ -344,6 +345,7 @@
     <file baseinstalldir="/" name="src/core/lib/iomgr/endpoint.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/endpoint_pair_posix.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/endpoint_pair_windows.c" role="src" />
+    <file baseinstalldir="/" name="src/core/lib/iomgr/ev_epoll_posix.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/ev_poll_posix.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/ev_posix.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/exec_ctx.c" role="src" />
diff --git a/src/core/lib/iomgr/ev_epoll_posix.c b/src/core/lib/iomgr/ev_epoll_posix.c
new file mode 100644
index 00000000000..ce8d3981b3f
--- /dev/null
+++ b/src/core/lib/iomgr/ev_epoll_posix.c
@@ -0,0 +1,1733 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_POSIX_SOCKET
+
+#include "src/core/lib/iomgr/ev_epoll_posix.h"
+
+#include <assert.h>
+#include <errno.h>
+#include <poll.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/tls.h>
+#include <grpc/support/useful.h>
+
+#include "src/core/lib/iomgr/iomgr_internal.h"
+#include "src/core/lib/iomgr/wakeup_fd_posix.h"
+#include "src/core/lib/profiling/timers.h"
+#include "src/core/lib/support/block_annotate.h"
+
+/*******************************************************************************
+ * FD declarations
+ */
+
+/* TODO(sreek) : Check if grpc_fd_watcher is needed (and if so, check if we can
+ * share this between ev_poll_posix.h and ev_epoll_posix versions */
+
+typedef struct grpc_fd_watcher {
+  struct grpc_fd_watcher *next;
+  struct grpc_fd_watcher *prev;
+  grpc_pollset *pollset;
+  grpc_pollset_worker *worker;
+  grpc_fd *fd;
+} grpc_fd_watcher;
+
+struct grpc_fd {
+  int fd;
+  /* refst format:
+     bit0:   1=active/0=orphaned
+     bit1-n: refcount
+     meaning that mostly we ref by two to avoid altering the orphaned bit,
+     and just unref by 1 when we're ready to flag the object as orphaned */
+  gpr_atm refst;
+
+  gpr_mu mu;
+  int shutdown;
+  int closed;
+  int released;
+
+  /* The watcher list.
+
+     The following watcher related fields are protected by watcher_mu.
+
+     An fd_watcher is an ephemeral object created when an fd wants to
+     begin polling, and destroyed after the poll.
+
+     It denotes the fd's interest in whether to read poll or write poll
+     or both or neither on this fd.
+
+     If a watcher is asked to poll for reads or writes, the read_watcher
+     or write_watcher fields are set respectively. A watcher may be asked
+     to poll for both, in which case both fields will be set.
+
+     read_watcher and write_watcher may be NULL if no watcher has been
+     asked to poll for reads or writes.
+
+     If an fd_watcher is not asked to poll for reads or writes, it's added
+     to a linked list of inactive watchers, rooted at inactive_watcher_root.
+     If at a later time there becomes need of a poller to poll, one of
+     the inactive pollers may be kicked out of their poll loops to take
+     that responsibility. */
+  grpc_fd_watcher inactive_watcher_root;
+  grpc_fd_watcher *read_watcher;
+  grpc_fd_watcher *write_watcher;
+
+  grpc_closure *read_closure;
+  grpc_closure *write_closure;
+
+  struct grpc_fd *freelist_next;
+
+  grpc_closure *on_done_closure;
+
+  grpc_iomgr_object iomgr_object;
+};
+
+/* Begin polling on an fd.
+   Registers that the given pollset is interested in this fd - so that if read
+   or writability interest changes, the pollset can be kicked to pick up that
+   new interest.
+   Return value is:
+     (fd_needs_read? read_mask : 0) | (fd_needs_write? write_mask : 0)
+   i.e. a combination of read_mask and write_mask determined by the fd's current
+   interest in said events.
+   Polling strategies that do not need to alter their behavior depending on the
+   fd's current interest (such as epoll) do not need to call this function.
+   MUST NOT be called with a pollset lock taken */
+static uint32_t fd_begin_poll(grpc_fd *fd, grpc_pollset *pollset,
+                              grpc_pollset_worker *worker, uint32_t read_mask,
+                              uint32_t write_mask, grpc_fd_watcher *rec);
+/* Complete polling previously started with fd_begin_poll
+   MUST NOT be called with a pollset lock taken
+   if got_read or got_write are 1, also does the become_{readable,writable} as
+   appropriate. */
+static void fd_end_poll(grpc_exec_ctx *exec_ctx, grpc_fd_watcher *rec,
+                        int got_read, int got_write);
+
+/* Return 1 if this fd is orphaned, 0 otherwise */
+static bool fd_is_orphaned(grpc_fd *fd);
+
+/* Reference counting for fds */
+/*#define GRPC_FD_REF_COUNT_DEBUG*/
+#ifdef GRPC_FD_REF_COUNT_DEBUG
+static void fd_ref(grpc_fd *fd, const char *reason, const char *file, int line);
+static void fd_unref(grpc_fd *fd, const char *reason, const char *file,
+                     int line);
+#define GRPC_FD_REF(fd, reason) fd_ref(fd, reason, __FILE__, __LINE__)
+#define GRPC_FD_UNREF(fd, reason) fd_unref(fd, reason, __FILE__, __LINE__)
+#else
+static void fd_ref(grpc_fd *fd);
+static void fd_unref(grpc_fd *fd);
+#define GRPC_FD_REF(fd, reason) fd_ref(fd)
+#define GRPC_FD_UNREF(fd, reason) fd_unref(fd)
+#endif
+
+static void fd_global_init(void);
+static void fd_global_shutdown(void);
+
+#define CLOSURE_NOT_READY ((grpc_closure *)0)
+#define CLOSURE_READY ((grpc_closure *)1)
+
+/*******************************************************************************
+ * pollset declarations
+ */
+
+typedef struct grpc_pollset_vtable grpc_pollset_vtable;
+
+typedef struct grpc_cached_wakeup_fd {
+  grpc_wakeup_fd fd;
+  struct grpc_cached_wakeup_fd *next;
+} grpc_cached_wakeup_fd;
+
+struct grpc_pollset_worker {
+  grpc_cached_wakeup_fd *wakeup_fd;
+  int reevaluate_polling_on_wakeup;
+  int kicked_specifically;
+  struct grpc_pollset_worker *next;
+  struct grpc_pollset_worker *prev;
+};
+
+struct grpc_pollset {
+  /* pollsets under posix can mutate representation as fds are added and
+     removed.
+     For example, we may choose a poll() based implementation on linux for
+     few fds, and an epoll() based implementation for many fds */
+  const grpc_pollset_vtable *vtable;
+  gpr_mu mu;
+  grpc_pollset_worker root_worker;
+  int in_flight_cbs;
+  int shutting_down;
+  int called_shutdown;
+  int kicked_without_pollers;
+  grpc_closure *shutdown_done;
+  grpc_closure_list idle_jobs;
+  union {
+    int fd;
+    void *ptr;
+  } data;
+  /* Local cache of eventfds for workers */
+  grpc_cached_wakeup_fd *local_wakeup_cache;
+};
+
+struct grpc_pollset_vtable {
+  void (*add_fd)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                 struct grpc_fd *fd, int and_unlock_pollset);
+  void (*maybe_work_and_unlock)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                                grpc_pollset_worker *worker,
+                                gpr_timespec deadline, gpr_timespec now);
+  void (*finish_shutdown)(grpc_pollset *pollset);
+  void (*destroy)(grpc_pollset *pollset);
+};
+
+/* Add an fd to a pollset */
+static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                           struct grpc_fd *fd);
+
+static void pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
+                               grpc_pollset_set *pollset_set, grpc_fd *fd);
+
+/* Convert a timespec to milliseconds:
+   - very small or negative poll times are clamped to zero to do a
+     non-blocking poll (which becomes spin polling)
+   - other small values are rounded up to one millisecond
+   - longer than a millisecond polls are rounded up to the next nearest
+     millisecond to avoid spinning
+   - infinite timeouts are converted to -1 */
+static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
+                                           gpr_timespec now);
+
+/* Allow kick to wakeup the currently polling worker */
+#define GRPC_POLLSET_CAN_KICK_SELF 1
+/* Force the wakee to repoll when awoken */
+#define GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP 2
+/* As per pollset_kick, with an extended set of flags (defined above)
+   -- mostly for fd_posix's use. */
+static void pollset_kick_ext(grpc_pollset *p,
+                             grpc_pollset_worker *specific_worker,
+                             uint32_t flags);
+
+/* turn a pollset into a multipoller: platform specific */
+typedef void (*platform_become_multipoller_type)(grpc_exec_ctx *exec_ctx,
+                                                 grpc_pollset *pollset,
+                                                 struct grpc_fd **fds,
+                                                 size_t fd_count);
+static platform_become_multipoller_type platform_become_multipoller;
+
+
+/* Return 1 if the pollset has active threads in pollset_work (pollset must
+ * be locked) */
+static int pollset_has_workers(grpc_pollset *pollset);
+
+static void remove_fd_from_all_epoll_sets(int fd);
+
+/*******************************************************************************
+ * pollset_set definitions
+ */
+
+struct grpc_pollset_set {
+  gpr_mu mu;
+
+  size_t pollset_count;
+  size_t pollset_capacity;
+  grpc_pollset **pollsets;
+
+  size_t pollset_set_count;
+  size_t pollset_set_capacity;
+  struct grpc_pollset_set **pollset_sets;
+
+  size_t fd_count;
+  size_t fd_capacity;
+  grpc_fd **fds;
+};
+
+/*******************************************************************************
+ * fd_posix.c
+ */
+
+/* We need to keep a freelist not because of any concerns of malloc performance
+ * but instead so that implementations with multiple threads in (for example)
+ * epoll_wait deal with the race between pollset removal and incoming poll
+ * notifications.
+ *
+ * The problem is that the poller ultimately holds a reference to this
+ * object, so it is very difficult to know when is safe to free it, at least
+ * without some expensive synchronization.
+ *
+ * If we keep the object freelisted, in the worst case losing this race just
+ * becomes a spurious read notification on a reused fd.
+ */
+/* TODO(klempner): We could use some form of polling generation count to know
+ * when these are safe to free. */
+/* TODO(klempner): Consider disabling freelisting if we don't have multiple
+ * threads in poll on the same fd */
+/* TODO(klempner): Batch these allocations to reduce fragmentation */
+static grpc_fd *fd_freelist = NULL;
+static gpr_mu fd_freelist_mu;
+
+static void freelist_fd(grpc_fd *fd) {
+  gpr_mu_lock(&fd_freelist_mu);
+  fd->freelist_next = fd_freelist;
+  fd_freelist = fd;
+  grpc_iomgr_unregister_object(&fd->iomgr_object);
+  gpr_mu_unlock(&fd_freelist_mu);
+}
+
+static grpc_fd *alloc_fd(int fd) {
+  grpc_fd *r = NULL;
+  gpr_mu_lock(&fd_freelist_mu);
+  if (fd_freelist != NULL) {
+    r = fd_freelist;
+    fd_freelist = fd_freelist->freelist_next;
+  }
+  gpr_mu_unlock(&fd_freelist_mu);
+  if (r == NULL) {
+    r = gpr_malloc(sizeof(grpc_fd));
+    gpr_mu_init(&r->mu);
+  }
+
+  gpr_mu_lock(&r->mu);
+  gpr_atm_rel_store(&r->refst, 1);
+  r->shutdown = 0;
+  r->read_closure = CLOSURE_NOT_READY;
+  r->write_closure = CLOSURE_NOT_READY;
+  r->fd = fd;
+  r->inactive_watcher_root.next = r->inactive_watcher_root.prev =
+      &r->inactive_watcher_root;
+  r->freelist_next = NULL;
+  r->read_watcher = r->write_watcher = NULL;
+  r->on_done_closure = NULL;
+  r->closed = 0;
+  r->released = 0;
+  gpr_mu_unlock(&r->mu);
+  return r;
+}
+
+static void destroy(grpc_fd *fd) {
+  gpr_mu_destroy(&fd->mu);
+  gpr_free(fd);
+}
+
+#ifdef GRPC_FD_REF_COUNT_DEBUG
+#define REF_BY(fd, n, reason) ref_by(fd, n, reason, __FILE__, __LINE__)
+#define UNREF_BY(fd, n, reason) unref_by(fd, n, reason, __FILE__, __LINE__)
+static void ref_by(grpc_fd *fd, int n, const char *reason, const char *file,
+                   int line) {
+  gpr_log(GPR_DEBUG, "FD %d %p   ref %d %d -> %d [%s; %s:%d]", fd->fd, fd, n,
+          gpr_atm_no_barrier_load(&fd->refst),
+          gpr_atm_no_barrier_load(&fd->refst) + n, reason, file, line);
+#else
+#define REF_BY(fd, n, reason) ref_by(fd, n)
+#define UNREF_BY(fd, n, reason) unref_by(fd, n)
+static void ref_by(grpc_fd *fd, int n) {
+#endif
+  GPR_ASSERT(gpr_atm_no_barrier_fetch_add(&fd->refst, n) > 0);
+}
+
+#ifdef GRPC_FD_REF_COUNT_DEBUG
+static void unref_by(grpc_fd *fd, int n, const char *reason, const char *file,
+                     int line) {
+  gpr_atm old;
+  gpr_log(GPR_DEBUG, "FD %d %p unref %d %d -> %d [%s; %s:%d]", fd->fd, fd, n,
+          gpr_atm_no_barrier_load(&fd->refst),
+          gpr_atm_no_barrier_load(&fd->refst) - n, reason, file, line);
+#else
+static void unref_by(grpc_fd *fd, int n) {
+  gpr_atm old;
+#endif
+  old = gpr_atm_full_fetch_add(&fd->refst, -n);
+  if (old == n) {
+    freelist_fd(fd);
+  } else {
+    GPR_ASSERT(old > n);
+  }
+}
+
+static void fd_global_init(void) { gpr_mu_init(&fd_freelist_mu); }
+
+static void fd_global_shutdown(void) {
+  gpr_mu_lock(&fd_freelist_mu);
+  gpr_mu_unlock(&fd_freelist_mu);
+  while (fd_freelist != NULL) {
+    grpc_fd *fd = fd_freelist;
+    fd_freelist = fd_freelist->freelist_next;
+    destroy(fd);
+  }
+  gpr_mu_destroy(&fd_freelist_mu);
+}
+
+static grpc_fd *fd_create(int fd, const char *name) {
+  grpc_fd *r = alloc_fd(fd);
+  char *name2;
+  gpr_asprintf(&name2, "%s fd=%d", name, fd);
+  grpc_iomgr_register_object(&r->iomgr_object, name2);
+  gpr_free(name2);
+#ifdef GRPC_FD_REF_COUNT_DEBUG
+  gpr_log(GPR_DEBUG, "FD %d %p create %s", fd, r, name);
+#endif
+  return r;
+}
+
+static bool fd_is_orphaned(grpc_fd *fd) {
+  return (gpr_atm_acq_load(&fd->refst) & 1) == 0;
+}
+
+static void pollset_kick_locked(grpc_fd_watcher *watcher) {
+  gpr_mu_lock(&watcher->pollset->mu);
+  GPR_ASSERT(watcher->worker);
+  pollset_kick_ext(watcher->pollset, watcher->worker,
+                   GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP);
+  gpr_mu_unlock(&watcher->pollset->mu);
+}
+
+static void maybe_wake_one_watcher_locked(grpc_fd *fd) {
+  if (fd->inactive_watcher_root.next != &fd->inactive_watcher_root) {
+    pollset_kick_locked(fd->inactive_watcher_root.next);
+  } else if (fd->read_watcher) {
+    pollset_kick_locked(fd->read_watcher);
+  } else if (fd->write_watcher) {
+    pollset_kick_locked(fd->write_watcher);
+  }
+}
+
+static void wake_all_watchers_locked(grpc_fd *fd) {
+  grpc_fd_watcher *watcher;
+  for (watcher = fd->inactive_watcher_root.next;
+       watcher != &fd->inactive_watcher_root; watcher = watcher->next) {
+    pollset_kick_locked(watcher);
+  }
+  if (fd->read_watcher) {
+    pollset_kick_locked(fd->read_watcher);
+  }
+  if (fd->write_watcher && fd->write_watcher != fd->read_watcher) {
+    pollset_kick_locked(fd->write_watcher);
+  }
+}
+
+static int has_watchers(grpc_fd *fd) {
+  return fd->read_watcher != NULL || fd->write_watcher != NULL ||
+         fd->inactive_watcher_root.next != &fd->inactive_watcher_root;
+}
+
+static void close_fd_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
+  fd->closed = 1;
+  if (!fd->released) {
+    close(fd->fd);
+  } else {
+    remove_fd_from_all_epoll_sets(fd->fd);
+  }
+  grpc_exec_ctx_enqueue(exec_ctx, fd->on_done_closure, true, NULL);
+}
+
+static int fd_wrapped_fd(grpc_fd *fd) {
+  if (fd->released || fd->closed) {
+    return -1;
+  } else {
+    return fd->fd;
+  }
+}
+
+static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                      grpc_closure *on_done, int *release_fd,
+                      const char *reason) {
+  fd->on_done_closure = on_done;
+  fd->released = release_fd != NULL;
+  if (!fd->released) {
+    shutdown(fd->fd, SHUT_RDWR);
+  } else {
+    *release_fd = fd->fd;
+  }
+  gpr_mu_lock(&fd->mu);
+  REF_BY(fd, 1, reason); /* remove active status, but keep referenced */
+  if (!has_watchers(fd)) {
+    close_fd_locked(exec_ctx, fd);
+  } else {
+    wake_all_watchers_locked(fd);
+  }
+  gpr_mu_unlock(&fd->mu);
+  UNREF_BY(fd, 2, reason); /* drop the reference */
+}
+
+/* increment refcount by two to avoid changing the orphan bit */
+#ifdef GRPC_FD_REF_COUNT_DEBUG
+static void fd_ref(grpc_fd *fd, const char *reason, const char *file,
+                   int line) {
+  ref_by(fd, 2, reason, file, line);
+}
+
+static void fd_unref(grpc_fd *fd, const char *reason, const char *file,
+                     int line) {
+  unref_by(fd, 2, reason, file, line);
+}
+#else
+static void fd_ref(grpc_fd *fd) { ref_by(fd, 2); }
+
+static void fd_unref(grpc_fd *fd) { unref_by(fd, 2); }
+#endif
+
+static void notify_on_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                             grpc_closure **st, grpc_closure *closure) {
+  if (*st == CLOSURE_NOT_READY) {
+    /* not ready ==> switch to a waiting state by setting the closure */
+    *st = closure;
+  } else if (*st == CLOSURE_READY) {
+    /* already ready ==> queue the closure to run immediately */
+    *st = CLOSURE_NOT_READY;
+    grpc_exec_ctx_enqueue(exec_ctx, closure, !fd->shutdown, NULL);
+    maybe_wake_one_watcher_locked(fd);
+  } else {
+    /* upcallptr was set to a different closure.  This is an error! */
+    gpr_log(GPR_ERROR,
+            "User called a notify_on function with a previous callback still "
+            "pending");
+    abort();
+  }
+}
+
+/* returns 1 if state becomes not ready */
+static int set_ready_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                            grpc_closure **st) {
+  if (*st == CLOSURE_READY) {
+    /* duplicate ready ==> ignore */
+    return 0;
+  } else if (*st == CLOSURE_NOT_READY) {
+    /* not ready, and not waiting ==> flag ready */
+    *st = CLOSURE_READY;
+    return 0;
+  } else {
+    /* waiting ==> queue closure */
+    grpc_exec_ctx_enqueue(exec_ctx, *st, !fd->shutdown, NULL);
+    *st = CLOSURE_NOT_READY;
+    return 1;
+  }
+}
+
+static void fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
+  gpr_mu_lock(&fd->mu);
+  GPR_ASSERT(!fd->shutdown);
+  fd->shutdown = 1;
+  set_ready_locked(exec_ctx, fd, &fd->read_closure);
+  set_ready_locked(exec_ctx, fd, &fd->write_closure);
+  gpr_mu_unlock(&fd->mu);
+}
+
+static void fd_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                              grpc_closure *closure) {
+  gpr_mu_lock(&fd->mu);
+  notify_on_locked(exec_ctx, fd, &fd->read_closure, closure);
+  gpr_mu_unlock(&fd->mu);
+}
+
+static void fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                               grpc_closure *closure) {
+  gpr_mu_lock(&fd->mu);
+  notify_on_locked(exec_ctx, fd, &fd->write_closure, closure);
+  gpr_mu_unlock(&fd->mu);
+}
+
+static uint32_t fd_begin_poll(grpc_fd *fd, grpc_pollset *pollset,
+                              grpc_pollset_worker *worker, uint32_t read_mask,
+                              uint32_t write_mask, grpc_fd_watcher *watcher) {
+  uint32_t mask = 0;
+  grpc_closure *cur;
+  int requested;
+  /* keep track of pollers that have requested our events, in case they change
+   */
+  GRPC_FD_REF(fd, "poll");
+
+  gpr_mu_lock(&fd->mu);
+
+  /* if we are shutdown, then don't add to the watcher set */
+  if (fd->shutdown) {
+    watcher->fd = NULL;
+    watcher->pollset = NULL;
+    watcher->worker = NULL;
+    gpr_mu_unlock(&fd->mu);
+    GRPC_FD_UNREF(fd, "poll");
+    return 0;
+  }
+
+  /* if there is nobody polling for read, but we need to, then start doing so */
+  cur = fd->read_closure;
+  requested = cur != CLOSURE_READY;
+  if (read_mask && fd->read_watcher == NULL && requested) {
+    fd->read_watcher = watcher;
+    mask |= read_mask;
+  }
+  /* if there is nobody polling for write, but we need to, then start doing so
+   */
+  cur = fd->write_closure;
+  requested = cur != CLOSURE_READY;
+  if (write_mask && fd->write_watcher == NULL && requested) {
+    fd->write_watcher = watcher;
+    mask |= write_mask;
+  }
+  /* if not polling, remember this watcher in case we need someone to later */
+  if (mask == 0 && worker != NULL) {
+    watcher->next = &fd->inactive_watcher_root;
+    watcher->prev = watcher->next->prev;
+    watcher->next->prev = watcher->prev->next = watcher;
+  }
+  watcher->pollset = pollset;
+  watcher->worker = worker;
+  watcher->fd = fd;
+  gpr_mu_unlock(&fd->mu);
+
+  return mask;
+}
+
+static void fd_end_poll(grpc_exec_ctx *exec_ctx, grpc_fd_watcher *watcher,
+                        int got_read, int got_write) {
+  int was_polling = 0;
+  int kick = 0;
+  grpc_fd *fd = watcher->fd;
+
+  if (fd == NULL) {
+    return;
+  }
+
+  gpr_mu_lock(&fd->mu);
+
+  if (watcher == fd->read_watcher) {
+    /* remove read watcher, kick if we still need a read */
+    was_polling = 1;
+    if (!got_read) {
+      kick = 1;
+    }
+    fd->read_watcher = NULL;
+  }
+  if (watcher == fd->write_watcher) {
+    /* remove write watcher, kick if we still need a write */
+    was_polling = 1;
+    if (!got_write) {
+      kick = 1;
+    }
+    fd->write_watcher = NULL;
+  }
+  if (!was_polling && watcher->worker != NULL) {
+    /* remove from inactive list */
+    watcher->next->prev = watcher->prev;
+    watcher->prev->next = watcher->next;
+  }
+  if (got_read) {
+    if (set_ready_locked(exec_ctx, fd, &fd->read_closure)) {
+      kick = 1;
+    }
+  }
+  if (got_write) {
+    if (set_ready_locked(exec_ctx, fd, &fd->write_closure)) {
+      kick = 1;
+    }
+  }
+  if (kick) {
+    maybe_wake_one_watcher_locked(fd);
+  }
+  if (fd_is_orphaned(fd) && !has_watchers(fd) && !fd->closed) {
+    close_fd_locked(exec_ctx, fd);
+  }
+  gpr_mu_unlock(&fd->mu);
+
+  GRPC_FD_UNREF(fd, "poll");
+}
+
+/*******************************************************************************
+ * pollset_posix.c
+ */
+
+GPR_TLS_DECL(g_current_thread_poller);
+GPR_TLS_DECL(g_current_thread_worker);
+
+/** The alarm system needs to be able to wakeup 'some poller' sometimes
+ *  (specifically when a new alarm needs to be triggered earlier than the next
+ *  alarm 'epoch').
+ *  This wakeup_fd gives us something to alert on when such a case occurs. */
+grpc_wakeup_fd grpc_global_wakeup_fd;
+
+static void remove_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
+  worker->prev->next = worker->next;
+  worker->next->prev = worker->prev;
+}
+
+static int pollset_has_workers(grpc_pollset *p) {
+  return p->root_worker.next != &p->root_worker;
+}
+
+static grpc_pollset_worker *pop_front_worker(grpc_pollset *p) {
+  if (pollset_has_workers(p)) {
+    grpc_pollset_worker *w = p->root_worker.next;
+    remove_worker(p, w);
+    return w;
+  } else {
+    return NULL;
+  }
+}
+
+static void push_back_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
+  worker->next = &p->root_worker;
+  worker->prev = worker->next->prev;
+  worker->prev->next = worker->next->prev = worker;
+}
+
+static void push_front_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
+  worker->prev = &p->root_worker;
+  worker->next = worker->prev->next;
+  worker->prev->next = worker->next->prev = worker;
+}
+
+static void pollset_kick_ext(grpc_pollset *p,
+                             grpc_pollset_worker *specific_worker,
+                             uint32_t flags) {
+  GPR_TIMER_BEGIN("pollset_kick_ext", 0);
+
+  /* pollset->mu already held */
+  if (specific_worker != NULL) {
+    if (specific_worker == GRPC_POLLSET_KICK_BROADCAST) {
+      GPR_TIMER_BEGIN("pollset_kick_ext.broadcast", 0);
+      GPR_ASSERT((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) == 0);
+      for (specific_worker = p->root_worker.next;
+           specific_worker != &p->root_worker;
+           specific_worker = specific_worker->next) {
+        grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
+      }
+      p->kicked_without_pollers = 1;
+      GPR_TIMER_END("pollset_kick_ext.broadcast", 0);
+    } else if (gpr_tls_get(&g_current_thread_worker) !=
+               (intptr_t)specific_worker) {
+      GPR_TIMER_MARK("different_thread_worker", 0);
+      if ((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) != 0) {
+        specific_worker->reevaluate_polling_on_wakeup = 1;
+      }
+      specific_worker->kicked_specifically = 1;
+      grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
+    } else if ((flags & GRPC_POLLSET_CAN_KICK_SELF) != 0) {
+      GPR_TIMER_MARK("kick_yoself", 0);
+      if ((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) != 0) {
+        specific_worker->reevaluate_polling_on_wakeup = 1;
+      }
+      specific_worker->kicked_specifically = 1;
+      grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
+    }
+  } else if (gpr_tls_get(&g_current_thread_poller) != (intptr_t)p) {
+    GPR_ASSERT((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) == 0);
+    GPR_TIMER_MARK("kick_anonymous", 0);
+    specific_worker = pop_front_worker(p);
+    if (specific_worker != NULL) {
+      if (gpr_tls_get(&g_current_thread_worker) == (intptr_t)specific_worker) {
+        GPR_TIMER_MARK("kick_anonymous_not_self", 0);
+        push_back_worker(p, specific_worker);
+        specific_worker = pop_front_worker(p);
+        if ((flags & GRPC_POLLSET_CAN_KICK_SELF) == 0 &&
+            gpr_tls_get(&g_current_thread_worker) ==
+                (intptr_t)specific_worker) {
+          push_back_worker(p, specific_worker);
+          specific_worker = NULL;
+        }
+      }
+      if (specific_worker != NULL) {
+        GPR_TIMER_MARK("finally_kick", 0);
+        push_back_worker(p, specific_worker);
+        grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
+      }
+    } else {
+      GPR_TIMER_MARK("kicked_no_pollers", 0);
+      p->kicked_without_pollers = 1;
+    }
+  }
+
+  GPR_TIMER_END("pollset_kick_ext", 0);
+}
+
+static void pollset_kick(grpc_pollset *p,
+                         grpc_pollset_worker *specific_worker) {
+  pollset_kick_ext(p, specific_worker, 0);
+}
+
+/* global state management */
+
+static void pollset_global_init(void) {
+  gpr_tls_init(&g_current_thread_poller);
+  gpr_tls_init(&g_current_thread_worker);
+  grpc_wakeup_fd_init(&grpc_global_wakeup_fd);
+}
+
+static void pollset_global_shutdown(void) {
+  grpc_wakeup_fd_destroy(&grpc_global_wakeup_fd);
+  gpr_tls_destroy(&g_current_thread_poller);
+  gpr_tls_destroy(&g_current_thread_worker);
+}
+
+static void kick_poller(void) { grpc_wakeup_fd_wakeup(&grpc_global_wakeup_fd); }
+
+/* main interface */
+
+static void become_basic_pollset(grpc_pollset *pollset, grpc_fd *fd_or_null);
+
+static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
+  gpr_mu_init(&pollset->mu);
+  *mu = &pollset->mu;
+  pollset->root_worker.next = pollset->root_worker.prev = &pollset->root_worker;
+  pollset->in_flight_cbs = 0;
+  pollset->shutting_down = 0;
+  pollset->called_shutdown = 0;
+  pollset->kicked_without_pollers = 0;
+  pollset->idle_jobs.head = pollset->idle_jobs.tail = NULL;
+  pollset->local_wakeup_cache = NULL;
+  pollset->kicked_without_pollers = 0;
+  become_basic_pollset(pollset, NULL);
+}
+
+static void pollset_destroy(grpc_pollset *pollset) {
+  GPR_ASSERT(pollset->in_flight_cbs == 0);
+  GPR_ASSERT(!pollset_has_workers(pollset));
+  GPR_ASSERT(pollset->idle_jobs.head == pollset->idle_jobs.tail);
+  pollset->vtable->destroy(pollset);
+  while (pollset->local_wakeup_cache) {
+    grpc_cached_wakeup_fd *next = pollset->local_wakeup_cache->next;
+    grpc_wakeup_fd_destroy(&pollset->local_wakeup_cache->fd);
+    gpr_free(pollset->local_wakeup_cache);
+    pollset->local_wakeup_cache = next;
+  }
+  gpr_mu_destroy(&pollset->mu);
+}
+
+static void pollset_reset(grpc_pollset *pollset) {
+  GPR_ASSERT(pollset->shutting_down);
+  GPR_ASSERT(pollset->in_flight_cbs == 0);
+  GPR_ASSERT(!pollset_has_workers(pollset));
+  GPR_ASSERT(pollset->idle_jobs.head == pollset->idle_jobs.tail);
+  pollset->vtable->destroy(pollset);
+  pollset->shutting_down = 0;
+  pollset->called_shutdown = 0;
+  pollset->kicked_without_pollers = 0;
+  become_basic_pollset(pollset, NULL);
+}
+
+static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                           grpc_fd *fd) {
+  gpr_mu_lock(&pollset->mu);
+  pollset->vtable->add_fd(exec_ctx, pollset, fd, 1);
+/* the following (enabled only in debug) will reacquire and then release
+   our lock - meaning that if the unlocking flag passed to add_fd above is
+   not respected, the code will deadlock (in a way that we have a chance of
+   debugging) */
+#ifndef NDEBUG
+  gpr_mu_lock(&pollset->mu);
+  gpr_mu_unlock(&pollset->mu);
+#endif
+}
+
+static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset) {
+  GPR_ASSERT(grpc_closure_list_empty(pollset->idle_jobs));
+  pollset->vtable->finish_shutdown(pollset);
+  grpc_exec_ctx_enqueue(exec_ctx, pollset->shutdown_done, true, NULL);
+}
+
+static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                         grpc_pollset_worker **worker_hdl, gpr_timespec now,
+                         gpr_timespec deadline) {
+  grpc_pollset_worker worker;
+  *worker_hdl = &worker;
+
+  /* pollset->mu already held */
+  int added_worker = 0;
+  int locked = 1;
+  int queued_work = 0;
+  int keep_polling = 0;
+  GPR_TIMER_BEGIN("pollset_work", 0);
+  /* this must happen before we (potentially) drop pollset->mu */
+  worker.next = worker.prev = NULL;
+  worker.reevaluate_polling_on_wakeup = 0;
+  if (pollset->local_wakeup_cache != NULL) {
+    worker.wakeup_fd = pollset->local_wakeup_cache;
+    pollset->local_wakeup_cache = worker.wakeup_fd->next;
+  } else {
+    worker.wakeup_fd = gpr_malloc(sizeof(*worker.wakeup_fd));
+    grpc_wakeup_fd_init(&worker.wakeup_fd->fd);
+  }
+  worker.kicked_specifically = 0;
+  /* If there's work waiting for the pollset to be idle, and the
+     pollset is idle, then do that work */
+  if (!pollset_has_workers(pollset) &&
+      !grpc_closure_list_empty(pollset->idle_jobs)) {
+    GPR_TIMER_MARK("pollset_work.idle_jobs", 0);
+    grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs, NULL);
+    goto done;
+  }
+  /* If we're shutting down then we don't execute any extended work */
+  if (pollset->shutting_down) {
+    GPR_TIMER_MARK("pollset_work.shutting_down", 0);
+    goto done;
+  }
+  /* Give do_promote priority so we don't starve it out */
+  if (pollset->in_flight_cbs) {
+    GPR_TIMER_MARK("pollset_work.in_flight_cbs", 0);
+    gpr_mu_unlock(&pollset->mu);
+    locked = 0;
+    goto done;
+  }
+  /* Start polling, and keep doing so while we're being asked to
+     re-evaluate our pollers (this allows poll() based pollers to
+     ensure they don't miss wakeups) */
+  keep_polling = 1;
+  while (keep_polling) {
+    keep_polling = 0;
+    if (!pollset->kicked_without_pollers) {
+      if (!added_worker) {
+        push_front_worker(pollset, &worker);
+        added_worker = 1;
+        gpr_tls_set(&g_current_thread_worker, (intptr_t)&worker);
+      }
+      gpr_tls_set(&g_current_thread_poller, (intptr_t)pollset);
+      GPR_TIMER_BEGIN("maybe_work_and_unlock", 0);
+      pollset->vtable->maybe_work_and_unlock(exec_ctx, pollset, &worker,
+                                             deadline, now);
+      GPR_TIMER_END("maybe_work_and_unlock", 0);
+      locked = 0;
+      gpr_tls_set(&g_current_thread_poller, 0);
+    } else {
+      GPR_TIMER_MARK("pollset_work.kicked_without_pollers", 0);
+      pollset->kicked_without_pollers = 0;
+    }
+  /* Finished execution - start cleaning up.
+     Note that we may arrive here from outside the enclosing while() loop.
+     In that case we won't loop though as we haven't added worker to the
+     worker list, which means nobody could ask us to re-evaluate polling). */
+  done:
+    if (!locked) {
+      queued_work |= grpc_exec_ctx_flush(exec_ctx);
+      gpr_mu_lock(&pollset->mu);
+      locked = 1;
+    }
+    /* If we're forced to re-evaluate polling (via pollset_kick with
+       GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) then we land here and force
+       a loop */
+    if (worker.reevaluate_polling_on_wakeup) {
+      worker.reevaluate_polling_on_wakeup = 0;
+      pollset->kicked_without_pollers = 0;
+      if (queued_work || worker.kicked_specifically) {
+        /* If there's queued work on the list, then set the deadline to be
+           immediate so we get back out of the polling loop quickly */
+        deadline = gpr_inf_past(GPR_CLOCK_MONOTONIC);
+      }
+      keep_polling = 1;
+    }
+  }
+  if (added_worker) {
+    remove_worker(pollset, &worker);
+    gpr_tls_set(&g_current_thread_worker, 0);
+  }
+  /* release wakeup fd to the local pool */
+  worker.wakeup_fd->next = pollset->local_wakeup_cache;
+  pollset->local_wakeup_cache = worker.wakeup_fd;
+  /* check shutdown conditions */
+  if (pollset->shutting_down) {
+    if (pollset_has_workers(pollset)) {
+      pollset_kick(pollset, NULL);
+    } else if (!pollset->called_shutdown && pollset->in_flight_cbs == 0) {
+      pollset->called_shutdown = 1;
+      gpr_mu_unlock(&pollset->mu);
+      finish_shutdown(exec_ctx, pollset);
+      grpc_exec_ctx_flush(exec_ctx);
+      /* Continuing to access pollset here is safe -- it is the caller's
+       * responsibility to not destroy when it has outstanding calls to
+       * pollset_work.
+       * TODO(dklempner): Can we refactor the shutdown logic to avoid this? */
+      gpr_mu_lock(&pollset->mu);
+    } else if (!grpc_closure_list_empty(pollset->idle_jobs)) {
+      grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs, NULL);
+      gpr_mu_unlock(&pollset->mu);
+      grpc_exec_ctx_flush(exec_ctx);
+      gpr_mu_lock(&pollset->mu);
+    }
+  }
+  *worker_hdl = NULL;
+  GPR_TIMER_END("pollset_work", 0);
+}
+
+static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                             grpc_closure *closure) {
+  GPR_ASSERT(!pollset->shutting_down);
+  pollset->shutting_down = 1;
+  pollset->shutdown_done = closure;
+  pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
+  if (!pollset_has_workers(pollset)) {
+    grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs, NULL);
+  }
+  if (!pollset->called_shutdown && pollset->in_flight_cbs == 0 &&
+      !pollset_has_workers(pollset)) {
+    pollset->called_shutdown = 1;
+    finish_shutdown(exec_ctx, pollset);
+  }
+}
+
+static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
+                                           gpr_timespec now) {
+  gpr_timespec timeout;
+  static const int64_t max_spin_polling_us = 10;
+  if (gpr_time_cmp(deadline, gpr_inf_future(deadline.clock_type)) == 0) {
+    return -1;
+  }
+  if (gpr_time_cmp(deadline, gpr_time_add(now, gpr_time_from_micros(
+                                                   max_spin_polling_us,
+                                                   GPR_TIMESPAN))) <= 0) {
+    return 0;
+  }
+  timeout = gpr_time_sub(deadline, now);
+  return gpr_time_to_millis(gpr_time_add(
+      timeout, gpr_time_from_nanos(GPR_NS_PER_MS - 1, GPR_TIMESPAN)));
+}
+
+/*
+ * basic_pollset - a vtable that provides polling for zero or one file
+ *                 descriptor via poll()
+ */
+
+typedef struct grpc_unary_promote_args {
+  const grpc_pollset_vtable *original_vtable;
+  grpc_pollset *pollset;
+  grpc_fd *fd;
+  grpc_closure promotion_closure;
+} grpc_unary_promote_args;
+
+static void basic_do_promote(grpc_exec_ctx *exec_ctx, void *args,
+                             bool success) {
+  grpc_unary_promote_args *up_args = args;
+  const grpc_pollset_vtable *original_vtable = up_args->original_vtable;
+  grpc_pollset *pollset = up_args->pollset;
+  grpc_fd *fd = up_args->fd;
+
+  /*
+   * This is quite tricky. There are a number of cases to keep in mind here:
+   * 1. fd may have been orphaned
+   * 2. The pollset may no longer be a unary poller (and we can't let case #1
+   * leak to other pollset types!)
+   * 3. pollset's fd (which may have changed) may have been orphaned
+   * 4. The pollset may be shutting down.
+   */
+
+  gpr_mu_lock(&pollset->mu);
+  /* First we need to ensure that nobody is polling concurrently */
+  GPR_ASSERT(!pollset_has_workers(pollset));
+
+  gpr_free(up_args);
+  /* At this point the pollset may no longer be a unary poller. In that case
+   * we should just call the right add function and be done. */
+  /* TODO(klempner): If we're not careful this could cause infinite recursion.
+   * That's not a problem for now because empty_pollset has a trivial poller
+   * and we don't have any mechanism to unbecome multipoller. */
+  pollset->in_flight_cbs--;
+  if (pollset->shutting_down) {
+    /* We don't care about this pollset anymore. */
+    if (pollset->in_flight_cbs == 0 && !pollset->called_shutdown) {
+      pollset->called_shutdown = 1;
+      finish_shutdown(exec_ctx, pollset);
+    }
+  } else if (fd_is_orphaned(fd)) {
+    /* Don't try to add it to anything, we'll drop our ref on it below */
+  } else if (pollset->vtable != original_vtable) {
+    pollset->vtable->add_fd(exec_ctx, pollset, fd, 0);
+  } else if (fd != pollset->data.ptr) {
+    grpc_fd *fds[2];
+    fds[0] = pollset->data.ptr;
+    fds[1] = fd;
+
+    if (fds[0] && !fd_is_orphaned(fds[0])) {
+      platform_become_multipoller(exec_ctx, pollset, fds, GPR_ARRAY_SIZE(fds));
+      GRPC_FD_UNREF(fds[0], "basicpoll");
+    } else {
+      /* old fd is orphaned and we haven't cleaned it up until now, so remain a
+       * unary poller */
+      /* Note that it is possible that fds[1] is also orphaned at this point.
+       * That's okay, we'll correct it at the next add or poll. */
+      if (fds[0]) GRPC_FD_UNREF(fds[0], "basicpoll");
+      pollset->data.ptr = fd;
+      GRPC_FD_REF(fd, "basicpoll");
+    }
+  }
+
+  gpr_mu_unlock(&pollset->mu);
+
+  /* Matching ref in basic_pollset_add_fd */
+  GRPC_FD_UNREF(fd, "basicpoll_add");
+}
+
+static void basic_pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                                 grpc_fd *fd, int and_unlock_pollset) {
+  grpc_unary_promote_args *up_args;
+  GPR_ASSERT(fd);
+  if (fd == pollset->data.ptr) goto exit;
+
+  if (!pollset_has_workers(pollset)) {
+    /* Fast path -- no in flight cbs */
+    /* TODO(klempner): Comment this out and fix any test failures or establish
+     * they are due to timing issues */
+    grpc_fd *fds[2];
+    fds[0] = pollset->data.ptr;
+    fds[1] = fd;
+
+    if (fds[0] == NULL) {
+      pollset->data.ptr = fd;
+      GRPC_FD_REF(fd, "basicpoll");
+    } else if (!fd_is_orphaned(fds[0])) {
+      platform_become_multipoller(exec_ctx, pollset, fds, GPR_ARRAY_SIZE(fds));
+      GRPC_FD_UNREF(fds[0], "basicpoll");
+    } else {
+      /* old fd is orphaned and we haven't cleaned it up until now, so remain a
+       * unary poller */
+      GRPC_FD_UNREF(fds[0], "basicpoll");
+      pollset->data.ptr = fd;
+      GRPC_FD_REF(fd, "basicpoll");
+    }
+    goto exit;
+  }
+
+  /* Now we need to promote. This needs to happen when we're not polling. Since
+   * this may be called from poll, the wait needs to happen asynchronously. */
+  GRPC_FD_REF(fd, "basicpoll_add");
+  pollset->in_flight_cbs++;
+  up_args = gpr_malloc(sizeof(*up_args));
+  up_args->fd = fd;
+  up_args->original_vtable = pollset->vtable;
+  up_args->pollset = pollset;
+  up_args->promotion_closure.cb = basic_do_promote;
+  up_args->promotion_closure.cb_arg = up_args;
+
+  grpc_closure_list_add(&pollset->idle_jobs, &up_args->promotion_closure, 1);
+  pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
+
+exit:
+  if (and_unlock_pollset) {
+    gpr_mu_unlock(&pollset->mu);
+  }
+}
+
+static void basic_pollset_maybe_work_and_unlock(grpc_exec_ctx *exec_ctx,
+                                                grpc_pollset *pollset,
+                                                grpc_pollset_worker *worker,
+                                                gpr_timespec deadline,
+                                                gpr_timespec now) {
+#define POLLOUT_CHECK (POLLOUT | POLLHUP | POLLERR)
+#define POLLIN_CHECK (POLLIN | POLLHUP | POLLERR)
+
+  struct pollfd pfd[3];
+  grpc_fd *fd;
+  grpc_fd_watcher fd_watcher;
+  int timeout;
+  int r;
+  nfds_t nfds;
+
+  fd = pollset->data.ptr;
+  if (fd && fd_is_orphaned(fd)) {
+    GRPC_FD_UNREF(fd, "basicpoll");
+    fd = pollset->data.ptr = NULL;
+  }
+  timeout = poll_deadline_to_millis_timeout(deadline, now);
+  pfd[0].fd = GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd);
+  pfd[0].events = POLLIN;
+  pfd[0].revents = 0;
+  pfd[1].fd = GRPC_WAKEUP_FD_GET_READ_FD(&worker->wakeup_fd->fd);
+  pfd[1].events = POLLIN;
+  pfd[1].revents = 0;
+  nfds = 2;
+  if (fd) {
+    pfd[2].fd = fd->fd;
+    pfd[2].revents = 0;
+    GRPC_FD_REF(fd, "basicpoll_begin");
+    gpr_mu_unlock(&pollset->mu);
+    pfd[2].events =
+        (short)fd_begin_poll(fd, pollset, worker, POLLIN, POLLOUT, &fd_watcher);
+    if (pfd[2].events != 0) {
+      nfds++;
+    }
+  } else {
+    gpr_mu_unlock(&pollset->mu);
+  }
+
+  /* TODO(vpai): Consider first doing a 0 timeout poll here to avoid
+     even going into the blocking annotation if possible */
+  /* poll fd count (argument 2) is shortened by one if we have no events
+     to poll on - such that it only includes the kicker */
+  GPR_TIMER_BEGIN("poll", 0);
+  GRPC_SCHEDULING_START_BLOCKING_REGION;
+  r = grpc_poll_function(pfd, nfds, timeout);
+  GRPC_SCHEDULING_END_BLOCKING_REGION;
+  GPR_TIMER_END("poll", 0);
+
+  if (r < 0) {
+    if (errno != EINTR) {
+      gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
+    }
+    if (fd) {
+      fd_end_poll(exec_ctx, &fd_watcher, 0, 0);
+    }
+  } else if (r == 0) {
+    if (fd) {
+      fd_end_poll(exec_ctx, &fd_watcher, 0, 0);
+    }
+  } else {
+    if (pfd[0].revents & POLLIN_CHECK) {
+      grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
+    }
+    if (pfd[1].revents & POLLIN_CHECK) {
+      grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd->fd);
+    }
+    if (nfds > 2) {
+      fd_end_poll(exec_ctx, &fd_watcher, pfd[2].revents & POLLIN_CHECK,
+                  pfd[2].revents & POLLOUT_CHECK);
+    } else if (fd) {
+      fd_end_poll(exec_ctx, &fd_watcher, 0, 0);
+    }
+  }
+
+  if (fd) {
+    GRPC_FD_UNREF(fd, "basicpoll_begin");
+  }
+}
+
+static void basic_pollset_destroy(grpc_pollset *pollset) {
+  if (pollset->data.ptr != NULL) {
+    GRPC_FD_UNREF(pollset->data.ptr, "basicpoll");
+    pollset->data.ptr = NULL;
+  }
+}
+
+static const grpc_pollset_vtable basic_pollset = {
+    basic_pollset_add_fd, basic_pollset_maybe_work_and_unlock,
+    basic_pollset_destroy, basic_pollset_destroy};
+
+static void become_basic_pollset(grpc_pollset *pollset, grpc_fd *fd_or_null) {
+  pollset->vtable = &basic_pollset;
+  pollset->data.ptr = fd_or_null;
+  if (fd_or_null != NULL) {
+    GRPC_FD_REF(fd_or_null, "basicpoll");
+  }
+}
+
+
+/*******************************************************************************
+ * pollset_multipoller_with_epoll_posix.c
+ */
+
+#include <errno.h>
+#include <poll.h>
+#include <string.h>
+#include <sys/epoll.h>
+#include <unistd.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/useful.h>
+
+#include "src/core/lib/iomgr/ev_posix.h"
+#include "src/core/lib/profiling/timers.h"
+#include "src/core/lib/support/block_annotate.h"
+
+static void set_ready(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure **st) {
+  /* only one set_ready can be active at once (but there may be a racing
+     notify_on) */
+  gpr_mu_lock(&fd->mu);
+  set_ready_locked(exec_ctx, fd, st);
+  gpr_mu_unlock(&fd->mu);
+}
+
+static void fd_become_readable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
+  set_ready(exec_ctx, fd, &fd->read_closure);
+}
+
+static void fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
+  set_ready(exec_ctx, fd, &fd->write_closure);
+}
+
+struct epoll_fd_list {
+  int *epoll_fds;
+  size_t count;
+  size_t capacity;
+};
+
+static struct epoll_fd_list epoll_fd_global_list;
+static gpr_once init_epoll_fd_list_mu = GPR_ONCE_INIT;
+static gpr_mu epoll_fd_list_mu;
+
+static void init_mu(void) { gpr_mu_init(&epoll_fd_list_mu); }
+
+static void add_epoll_fd_to_global_list(int epoll_fd) {
+  gpr_once_init(&init_epoll_fd_list_mu, init_mu);
+
+  gpr_mu_lock(&epoll_fd_list_mu);
+  if (epoll_fd_global_list.count == epoll_fd_global_list.capacity) {
+    epoll_fd_global_list.capacity =
+        GPR_MAX((size_t)8, epoll_fd_global_list.capacity * 2);
+    epoll_fd_global_list.epoll_fds =
+        gpr_realloc(epoll_fd_global_list.epoll_fds,
+                    epoll_fd_global_list.capacity * sizeof(int));
+  }
+  epoll_fd_global_list.epoll_fds[epoll_fd_global_list.count++] = epoll_fd;
+  gpr_mu_unlock(&epoll_fd_list_mu);
+}
+
+static void remove_epoll_fd_from_global_list(int epoll_fd) {
+  gpr_mu_lock(&epoll_fd_list_mu);
+  GPR_ASSERT(epoll_fd_global_list.count > 0);
+  for (size_t i = 0; i < epoll_fd_global_list.count; i++) {
+    if (epoll_fd == epoll_fd_global_list.epoll_fds[i]) {
+      epoll_fd_global_list.epoll_fds[i] =
+          epoll_fd_global_list.epoll_fds[--(epoll_fd_global_list.count)];
+      break;
+    }
+  }
+  gpr_mu_unlock(&epoll_fd_list_mu);
+}
+
+static void remove_fd_from_all_epoll_sets(int fd) {
+  int err;
+  gpr_once_init(&init_epoll_fd_list_mu, init_mu);
+  gpr_mu_lock(&epoll_fd_list_mu);
+  if (epoll_fd_global_list.count == 0) {
+    gpr_mu_unlock(&epoll_fd_list_mu);
+    return;
+  }
+  for (size_t i = 0; i < epoll_fd_global_list.count; i++) {
+    err = epoll_ctl(epoll_fd_global_list.epoll_fds[i], EPOLL_CTL_DEL, fd, NULL);
+    if (err < 0 && errno != ENOENT) {
+      gpr_log(GPR_ERROR, "epoll_ctl del for %d failed: %s", fd,
+              strerror(errno));
+    }
+  }
+  gpr_mu_unlock(&epoll_fd_list_mu);
+}
+
+typedef struct {
+  grpc_pollset *pollset;
+  grpc_fd *fd;
+  grpc_closure closure;
+} delayed_add;
+
+typedef struct { int epoll_fd; } epoll_hdr;
+
+static void finally_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                           grpc_fd *fd) {
+  epoll_hdr *h = pollset->data.ptr;
+  struct epoll_event ev;
+  int err;
+  grpc_fd_watcher watcher;
+
+  /* We pretend to be polling whilst adding an fd to keep the fd from being
+     closed during the add. This may result in a spurious wakeup being assigned
+     to this pollset whilst adding, but that should be benign. */
+  GPR_ASSERT(fd_begin_poll(fd, pollset, NULL, 0, 0, &watcher) == 0);
+  if (watcher.fd != NULL) {
+    ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET);
+    ev.data.ptr = fd;
+    err = epoll_ctl(h->epoll_fd, EPOLL_CTL_ADD, fd->fd, &ev);
+    if (err < 0) {
+      /* FDs may be added to a pollset multiple times, so EEXIST is normal. */
+      if (errno != EEXIST) {
+        gpr_log(GPR_ERROR, "epoll_ctl add for %d failed: %s", fd->fd,
+                strerror(errno));
+      }
+    }
+  }
+  fd_end_poll(exec_ctx, &watcher, 0, 0);
+}
+
+static void perform_delayed_add(grpc_exec_ctx *exec_ctx, void *arg,
+                                bool iomgr_status) {
+  delayed_add *da = arg;
+
+  if (!fd_is_orphaned(da->fd)) {
+    finally_add_fd(exec_ctx, da->pollset, da->fd);
+  }
+
+  gpr_mu_lock(&da->pollset->mu);
+  da->pollset->in_flight_cbs--;
+  if (da->pollset->shutting_down) {
+    /* We don't care about this pollset anymore. */
+    if (da->pollset->in_flight_cbs == 0 && !da->pollset->called_shutdown) {
+      da->pollset->called_shutdown = 1;
+      grpc_exec_ctx_enqueue(exec_ctx, da->pollset->shutdown_done, true, NULL);
+    }
+  }
+  gpr_mu_unlock(&da->pollset->mu);
+
+  GRPC_FD_UNREF(da->fd, "delayed_add");
+
+  gpr_free(da);
+}
+
+static void multipoll_with_epoll_pollset_add_fd(grpc_exec_ctx *exec_ctx,
+                                                grpc_pollset *pollset,
+                                                grpc_fd *fd,
+                                                int and_unlock_pollset) {
+  if (and_unlock_pollset) {
+    gpr_mu_unlock(&pollset->mu);
+    finally_add_fd(exec_ctx, pollset, fd);
+  } else {
+    delayed_add *da = gpr_malloc(sizeof(*da));
+    da->pollset = pollset;
+    da->fd = fd;
+    GRPC_FD_REF(fd, "delayed_add");
+    grpc_closure_init(&da->closure, perform_delayed_add, da);
+    pollset->in_flight_cbs++;
+    grpc_exec_ctx_enqueue(exec_ctx, &da->closure, true, NULL);
+  }
+}
+
+/* TODO(klempner): We probably want to turn this down a bit */
+#define GRPC_EPOLL_MAX_EVENTS 1000
+
+static void multipoll_with_epoll_pollset_maybe_work_and_unlock(
+    grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, grpc_pollset_worker *worker,
+    gpr_timespec deadline, gpr_timespec now) {
+  struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS];
+  int ep_rv;
+  int poll_rv;
+  epoll_hdr *h = pollset->data.ptr;
+  int timeout_ms;
+  struct pollfd pfds[2];
+
+  /* If you want to ignore epoll's ability to sanely handle parallel pollers,
+   * for a more apples-to-apples performance comparison with poll, add a
+   * if (pollset->counter != 0) { return 0; }
+   * here.
+   */
+
+  gpr_mu_unlock(&pollset->mu);
+
+  timeout_ms = poll_deadline_to_millis_timeout(deadline, now);
+
+  pfds[0].fd = GRPC_WAKEUP_FD_GET_READ_FD(&worker->wakeup_fd->fd);
+  pfds[0].events = POLLIN;
+  pfds[0].revents = 0;
+  pfds[1].fd = h->epoll_fd;
+  pfds[1].events = POLLIN;
+  pfds[1].revents = 0;
+
+  /* TODO(vpai): Consider first doing a 0 timeout poll here to avoid
+     even going into the blocking annotation if possible */
+  GPR_TIMER_BEGIN("poll", 0);
+  GRPC_SCHEDULING_START_BLOCKING_REGION;
+  poll_rv = grpc_poll_function(pfds, 2, timeout_ms);
+  GRPC_SCHEDULING_END_BLOCKING_REGION;
+  GPR_TIMER_END("poll", 0);
+
+  if (poll_rv < 0) {
+    if (errno != EINTR) {
+      gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
+    }
+  } else if (poll_rv == 0) {
+    /* do nothing */
+  } else {
+    if (pfds[0].revents) {
+      grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd->fd);
+    }
+    if (pfds[1].revents) {
+      do {
+        /* The following epoll_wait never blocks; it has a timeout of 0 */
+        ep_rv = epoll_wait(h->epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, 0);
+        if (ep_rv < 0) {
+          if (errno != EINTR) {
+            gpr_log(GPR_ERROR, "epoll_wait() failed: %s", strerror(errno));
+          }
+        } else {
+          int i;
+          for (i = 0; i < ep_rv; ++i) {
+            grpc_fd *fd = ep_ev[i].data.ptr;
+            /* TODO(klempner): We might want to consider making err and pri
+             * separate events */
+            int cancel = ep_ev[i].events & (EPOLLERR | EPOLLHUP);
+            int read_ev = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
+            int write_ev = ep_ev[i].events & EPOLLOUT;
+            if (fd == NULL) {
+              grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
+            } else {
+              if (read_ev || cancel) {
+                fd_become_readable(exec_ctx, fd);
+              }
+              if (write_ev || cancel) {
+                fd_become_writable(exec_ctx, fd);
+              }
+            }
+          }
+        }
+      } while (ep_rv == GRPC_EPOLL_MAX_EVENTS);
+    }
+  }
+}
+
+static void multipoll_with_epoll_pollset_finish_shutdown(
+    grpc_pollset *pollset) {}
+
+static void multipoll_with_epoll_pollset_destroy(grpc_pollset *pollset) {
+  epoll_hdr *h = pollset->data.ptr;
+  close(h->epoll_fd);
+  remove_epoll_fd_from_global_list(h->epoll_fd);
+  gpr_free(h);
+}
+
+static const grpc_pollset_vtable multipoll_with_epoll_pollset = {
+    multipoll_with_epoll_pollset_add_fd,
+    multipoll_with_epoll_pollset_maybe_work_and_unlock,
+    multipoll_with_epoll_pollset_finish_shutdown,
+    multipoll_with_epoll_pollset_destroy};
+
+static void epoll_become_multipoller(grpc_exec_ctx *exec_ctx,
+                                     grpc_pollset *pollset, grpc_fd **fds,
+                                     size_t nfds) {
+  size_t i;
+  epoll_hdr *h = gpr_malloc(sizeof(epoll_hdr));
+  struct epoll_event ev;
+  int err;
+
+  pollset->vtable = &multipoll_with_epoll_pollset;
+  pollset->data.ptr = h;
+  h->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
+  if (h->epoll_fd < 0) {
+    /* TODO(klempner): Fall back to poll here, especially on ENOSYS */
+    gpr_log(GPR_ERROR, "epoll_create1 failed: %s", strerror(errno));
+    abort();
+  }
+  add_epoll_fd_to_global_list(h->epoll_fd);
+
+  ev.events = (uint32_t)(EPOLLIN | EPOLLET);
+  ev.data.ptr = NULL;
+  err = epoll_ctl(h->epoll_fd, EPOLL_CTL_ADD,
+                  GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd), &ev);
+  if (err < 0) {
+    gpr_log(GPR_ERROR, "epoll_ctl add for %d failed: %s",
+            GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd),
+            strerror(errno));
+  }
+
+  for (i = 0; i < nfds; i++) {
+    multipoll_with_epoll_pollset_add_fd(exec_ctx, pollset, fds[i], 0);
+  }
+}
+
+/*******************************************************************************
+ * pollset_set_posix.c
+ */
+
+static grpc_pollset_set *pollset_set_create(void) {
+  grpc_pollset_set *pollset_set = gpr_malloc(sizeof(*pollset_set));
+  memset(pollset_set, 0, sizeof(*pollset_set));
+  gpr_mu_init(&pollset_set->mu);
+  return pollset_set;
+}
+
+static void pollset_set_destroy(grpc_pollset_set *pollset_set) {
+  size_t i;
+  gpr_mu_destroy(&pollset_set->mu);
+  for (i = 0; i < pollset_set->fd_count; i++) {
+    GRPC_FD_UNREF(pollset_set->fds[i], "pollset_set");
+  }
+  gpr_free(pollset_set->pollsets);
+  gpr_free(pollset_set->pollset_sets);
+  gpr_free(pollset_set->fds);
+  gpr_free(pollset_set);
+}
+
+static void pollset_set_add_pollset(grpc_exec_ctx *exec_ctx,
+                                    grpc_pollset_set *pollset_set,
+                                    grpc_pollset *pollset) {
+  size_t i, j;
+  gpr_mu_lock(&pollset_set->mu);
+  if (pollset_set->pollset_count == pollset_set->pollset_capacity) {
+    pollset_set->pollset_capacity =
+        GPR_MAX(8, 2 * pollset_set->pollset_capacity);
+    pollset_set->pollsets =
+        gpr_realloc(pollset_set->pollsets, pollset_set->pollset_capacity *
+                                               sizeof(*pollset_set->pollsets));
+  }
+  pollset_set->pollsets[pollset_set->pollset_count++] = pollset;
+  for (i = 0, j = 0; i < pollset_set->fd_count; i++) {
+    if (fd_is_orphaned(pollset_set->fds[i])) {
+      GRPC_FD_UNREF(pollset_set->fds[i], "pollset_set");
+    } else {
+      pollset_add_fd(exec_ctx, pollset, pollset_set->fds[i]);
+      pollset_set->fds[j++] = pollset_set->fds[i];
+    }
+  }
+  pollset_set->fd_count = j;
+  gpr_mu_unlock(&pollset_set->mu);
+}
+
+static void pollset_set_del_pollset(grpc_exec_ctx *exec_ctx,
+                                    grpc_pollset_set *pollset_set,
+                                    grpc_pollset *pollset) {
+  size_t i;
+  gpr_mu_lock(&pollset_set->mu);
+  for (i = 0; i < pollset_set->pollset_count; i++) {
+    if (pollset_set->pollsets[i] == pollset) {
+      pollset_set->pollset_count--;
+      GPR_SWAP(grpc_pollset *, pollset_set->pollsets[i],
+               pollset_set->pollsets[pollset_set->pollset_count]);
+      break;
+    }
+  }
+  gpr_mu_unlock(&pollset_set->mu);
+}
+
+static void pollset_set_add_pollset_set(grpc_exec_ctx *exec_ctx,
+                                        grpc_pollset_set *bag,
+                                        grpc_pollset_set *item) {
+  size_t i, j;
+  gpr_mu_lock(&bag->mu);
+  if (bag->pollset_set_count == bag->pollset_set_capacity) {
+    bag->pollset_set_capacity = GPR_MAX(8, 2 * bag->pollset_set_capacity);
+    bag->pollset_sets =
+        gpr_realloc(bag->pollset_sets,
+                    bag->pollset_set_capacity * sizeof(*bag->pollset_sets));
+  }
+  bag->pollset_sets[bag->pollset_set_count++] = item;
+  for (i = 0, j = 0; i < bag->fd_count; i++) {
+    if (fd_is_orphaned(bag->fds[i])) {
+      GRPC_FD_UNREF(bag->fds[i], "pollset_set");
+    } else {
+      pollset_set_add_fd(exec_ctx, item, bag->fds[i]);
+      bag->fds[j++] = bag->fds[i];
+    }
+  }
+  bag->fd_count = j;
+  gpr_mu_unlock(&bag->mu);
+}
+
+static void pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx,
+                                        grpc_pollset_set *bag,
+                                        grpc_pollset_set *item) {
+  size_t i;
+  gpr_mu_lock(&bag->mu);
+  for (i = 0; i < bag->pollset_set_count; i++) {
+    if (bag->pollset_sets[i] == item) {
+      bag->pollset_set_count--;
+      GPR_SWAP(grpc_pollset_set *, bag->pollset_sets[i],
+               bag->pollset_sets[bag->pollset_set_count]);
+      break;
+    }
+  }
+  gpr_mu_unlock(&bag->mu);
+}
+
+static void pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
+                               grpc_pollset_set *pollset_set, grpc_fd *fd) {
+  size_t i;
+  gpr_mu_lock(&pollset_set->mu);
+  if (pollset_set->fd_count == pollset_set->fd_capacity) {
+    pollset_set->fd_capacity = GPR_MAX(8, 2 * pollset_set->fd_capacity);
+    pollset_set->fds = gpr_realloc(
+        pollset_set->fds, pollset_set->fd_capacity * sizeof(*pollset_set->fds));
+  }
+  GRPC_FD_REF(fd, "pollset_set");
+  pollset_set->fds[pollset_set->fd_count++] = fd;
+  for (i = 0; i < pollset_set->pollset_count; i++) {
+    pollset_add_fd(exec_ctx, pollset_set->pollsets[i], fd);
+  }
+  for (i = 0; i < pollset_set->pollset_set_count; i++) {
+    pollset_set_add_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
+  }
+  gpr_mu_unlock(&pollset_set->mu);
+}
+
+static void pollset_set_del_fd(grpc_exec_ctx *exec_ctx,
+                               grpc_pollset_set *pollset_set, grpc_fd *fd) {
+  size_t i;
+  gpr_mu_lock(&pollset_set->mu);
+  for (i = 0; i < pollset_set->fd_count; i++) {
+    if (pollset_set->fds[i] == fd) {
+      pollset_set->fd_count--;
+      GPR_SWAP(grpc_fd *, pollset_set->fds[i],
+               pollset_set->fds[pollset_set->fd_count]);
+      GRPC_FD_UNREF(fd, "pollset_set");
+      break;
+    }
+  }
+  for (i = 0; i < pollset_set->pollset_set_count; i++) {
+    pollset_set_del_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
+  }
+  gpr_mu_unlock(&pollset_set->mu);
+}
+
+/*******************************************************************************
+ * event engine binding
+ */
+
+static void shutdown_engine(void) {
+  fd_global_shutdown();
+  pollset_global_shutdown();
+}
+
+static const grpc_event_engine_vtable vtable = {
+    .pollset_size = sizeof(grpc_pollset),
+
+    .fd_create = fd_create,
+    .fd_wrapped_fd = fd_wrapped_fd,
+    .fd_orphan = fd_orphan,
+    .fd_shutdown = fd_shutdown,
+    .fd_notify_on_read = fd_notify_on_read,
+    .fd_notify_on_write = fd_notify_on_write,
+
+    .pollset_init = pollset_init,
+    .pollset_shutdown = pollset_shutdown,
+    .pollset_reset = pollset_reset,
+    .pollset_destroy = pollset_destroy,
+    .pollset_work = pollset_work,
+    .pollset_kick = pollset_kick,
+    .pollset_add_fd = pollset_add_fd,
+
+    .pollset_set_create = pollset_set_create,
+    .pollset_set_destroy = pollset_set_destroy,
+    .pollset_set_add_pollset = pollset_set_add_pollset,
+    .pollset_set_del_pollset = pollset_set_del_pollset,
+    .pollset_set_add_pollset_set = pollset_set_add_pollset_set,
+    .pollset_set_del_pollset_set = pollset_set_del_pollset_set,
+    .pollset_set_add_fd = pollset_set_add_fd,
+    .pollset_set_del_fd = pollset_set_del_fd,
+
+    .kick_poller = kick_poller,
+
+    .shutdown_engine = shutdown_engine,
+};
+
+const grpc_event_engine_vtable *grpc_init_epoll_posix(void) {
+  platform_become_multipoller = epoll_become_multipoller;
+  fd_global_init();
+  pollset_global_init();
+  return &vtable;
+}
+
+#endif
diff --git a/src/core/lib/iomgr/ev_epoll_posix.h b/src/core/lib/iomgr/ev_epoll_posix.h
new file mode 100644
index 00000000000..35319b4fc5d
--- /dev/null
+++ b/src/core/lib/iomgr/ev_epoll_posix.h
@@ -0,0 +1,41 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_EV_EPOLL_POSIX_H
+#define GRPC_CORE_LIB_IOMGR_EV_EPOLL_POSIX_H
+
+#include "src/core/lib/iomgr/ev_posix.h"
+
+const grpc_event_engine_vtable *grpc_init_epoll_posix(void);
+
+#endif /* GRPC_CORE_LIB_IOMGR_EV_EPOLL_POSIX_H */
diff --git a/src/core/lib/iomgr/ev_posix.c b/src/core/lib/iomgr/ev_posix.c
index 95520b01d3a..baa3b9856ad 100644
--- a/src/core/lib/iomgr/ev_posix.c
+++ b/src/core/lib/iomgr/ev_posix.c
@@ -44,6 +44,7 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/useful.h>
 
+#include "src/core/lib/iomgr/ev_epoll_posix.h"
 #include "src/core/lib/iomgr/ev_poll_posix.h"
 #include "src/core/lib/support/env.h"
 
@@ -61,7 +62,7 @@ typedef struct {
 } event_engine_factory;
 
 static const event_engine_factory g_factories[] = {
-    {"poll", grpc_init_poll_posix},
+    {"poll", grpc_init_poll_posix}, {"epoll", grpc_init_epoll_posix},
 };
 
 static void add(const char *beg, const char *end, char ***ss, size_t *ns) {
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index be24dc7cf02..49b4ddc457c 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -94,6 +94,7 @@ CORE_SOURCE_FILES = [
   'src/core/lib/iomgr/endpoint.c',
   'src/core/lib/iomgr/endpoint_pair_posix.c',
   'src/core/lib/iomgr/endpoint_pair_windows.c',
+  'src/core/lib/iomgr/ev_epoll_posix.c',
   'src/core/lib/iomgr/ev_poll_posix.c',
   'src/core/lib/iomgr/ev_posix.c',
   'src/core/lib/iomgr/exec_ctx.c',
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index c3fd59b3c23..36b25cca161 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -807,6 +807,7 @@ src/core/lib/http/parser.h \
 src/core/lib/iomgr/closure.h \
 src/core/lib/iomgr/endpoint.h \
 src/core/lib/iomgr/endpoint_pair.h \
+src/core/lib/iomgr/ev_epoll_posix.h \
 src/core/lib/iomgr/ev_poll_posix.h \
 src/core/lib/iomgr/ev_posix.h \
 src/core/lib/iomgr/exec_ctx.h \
@@ -954,6 +955,7 @@ src/core/lib/iomgr/closure.c \
 src/core/lib/iomgr/endpoint.c \
 src/core/lib/iomgr/endpoint_pair_posix.c \
 src/core/lib/iomgr/endpoint_pair_windows.c \
+src/core/lib/iomgr/ev_epoll_posix.c \
 src/core/lib/iomgr/ev_poll_posix.c \
 src/core/lib/iomgr/ev_posix.c \
 src/core/lib/iomgr/exec_ctx.c \
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index 24d23fe28bd..43940495864 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -5530,6 +5530,7 @@
       "src/core/lib/iomgr/closure.h", 
       "src/core/lib/iomgr/endpoint.h", 
       "src/core/lib/iomgr/endpoint_pair.h", 
+      "src/core/lib/iomgr/ev_epoll_posix.h", 
       "src/core/lib/iomgr/ev_poll_posix.h", 
       "src/core/lib/iomgr/ev_posix.h", 
       "src/core/lib/iomgr/exec_ctx.h", 
@@ -5629,6 +5630,8 @@
       "src/core/lib/iomgr/endpoint_pair.h", 
       "src/core/lib/iomgr/endpoint_pair_posix.c", 
       "src/core/lib/iomgr/endpoint_pair_windows.c", 
+      "src/core/lib/iomgr/ev_epoll_posix.c", 
+      "src/core/lib/iomgr/ev_epoll_posix.h", 
       "src/core/lib/iomgr/ev_poll_posix.c", 
       "src/core/lib/iomgr/ev_poll_posix.h", 
       "src/core/lib/iomgr/ev_posix.c", 
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj b/vsprojects/vcxproj/grpc/grpc.vcxproj
index e5379dc6a49..55304af5869 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj
@@ -316,6 +316,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\closure.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint_pair.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_poll_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\exec_ctx.h" />
@@ -483,6 +484,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint_pair_windows.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_poll_posix.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_posix.c">
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
index 95a5a73d268..7d1c90fda7c 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
@@ -55,6 +55,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint_pair_windows.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.c">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_poll_posix.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
@@ -674,6 +677,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint_pair.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.h">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_poll_posix.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
index 90ad80f2fc2..3d0cdfc668b 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
@@ -304,6 +304,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\closure.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint_pair.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_poll_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\exec_ctx.h" />
@@ -449,6 +450,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint_pair_windows.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_poll_posix.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_posix.c">
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index 2b19c0fb341..d2ff4c630fd 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -58,6 +58,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint_pair_windows.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.c">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_poll_posix.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
@@ -572,6 +575,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint_pair.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.h">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_poll_posix.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>

From a7786001a22f511130a4292893cc8e2ab0ccdf75 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Wed, 11 May 2016 18:13:31 -0700
Subject: [PATCH 010/280] Remove basic_pollset and the promotion related code

---
 src/core/lib/iomgr/ev_epoll_posix.c | 355 ++++++----------------------
 1 file changed, 71 insertions(+), 284 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_posix.c b/src/core/lib/iomgr/ev_epoll_posix.c
index ce8d3981b3f..cb4a00a75c4 100644
--- a/src/core/lib/iomgr/ev_epoll_posix.c
+++ b/src/core/lib/iomgr/ev_epoll_posix.c
@@ -185,11 +185,6 @@ struct grpc_pollset_worker {
 };
 
 struct grpc_pollset {
-  /* pollsets under posix can mutate representation as fds are added and
-     removed.
-     For example, we may choose a poll() based implementation on linux for
-     few fds, and an epoll() based implementation for many fds */
-  const grpc_pollset_vtable *vtable;
   gpr_mu mu;
   grpc_pollset_worker root_worker;
   int in_flight_cbs;
@@ -248,8 +243,6 @@ typedef void (*platform_become_multipoller_type)(grpc_exec_ctx *exec_ctx,
                                                  grpc_pollset *pollset,
                                                  struct grpc_fd **fds,
                                                  size_t fd_count);
-static platform_become_multipoller_type platform_become_multipoller;
-
 
 /* Return 1 if the pollset has active threads in pollset_work (pollset must
  * be locked) */
@@ -796,8 +789,6 @@ static void kick_poller(void) { grpc_wakeup_fd_wakeup(&grpc_global_wakeup_fd); }
 
 /* main interface */
 
-static void become_basic_pollset(grpc_pollset *pollset, grpc_fd *fd_or_null);
-
 static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
   gpr_mu_init(&pollset->mu);
   *mu = &pollset->mu;
@@ -809,14 +800,20 @@ static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
   pollset->idle_jobs.head = pollset->idle_jobs.tail = NULL;
   pollset->local_wakeup_cache = NULL;
   pollset->kicked_without_pollers = 0;
-  become_basic_pollset(pollset, NULL);
+  pollset->data.ptr = NULL;
 }
 
+/* TODO(sreek): Maybe merge multipoll_*_destroy() with pollset_destroy()
+ * function */
+static void multipoll_with_epoll_pollset_destroy(grpc_pollset *pollset);
+
 static void pollset_destroy(grpc_pollset *pollset) {
   GPR_ASSERT(pollset->in_flight_cbs == 0);
   GPR_ASSERT(!pollset_has_workers(pollset));
   GPR_ASSERT(pollset->idle_jobs.head == pollset->idle_jobs.tail);
-  pollset->vtable->destroy(pollset);
+
+  multipoll_with_epoll_pollset_destroy(pollset);
+
   while (pollset->local_wakeup_cache) {
     grpc_cached_wakeup_fd *next = pollset->local_wakeup_cache->next;
     grpc_wakeup_fd_destroy(&pollset->local_wakeup_cache->fd);
@@ -831,17 +828,24 @@ static void pollset_reset(grpc_pollset *pollset) {
   GPR_ASSERT(pollset->in_flight_cbs == 0);
   GPR_ASSERT(!pollset_has_workers(pollset));
   GPR_ASSERT(pollset->idle_jobs.head == pollset->idle_jobs.tail);
-  pollset->vtable->destroy(pollset);
+
+  multipoll_with_epoll_pollset_destroy(pollset);
+
   pollset->shutting_down = 0;
   pollset->called_shutdown = 0;
   pollset->kicked_without_pollers = 0;
-  become_basic_pollset(pollset, NULL);
 }
 
+/* TODO (sreek): Remove multipoll_with_epoll_add_fd declaration*/
+static void multipoll_with_epoll_pollset_add_fd(grpc_exec_ctx *exec_ctx,
+                                                grpc_pollset *pollset,
+                                                grpc_fd *fd,
+                                                int and_unlock_pollset);
+
 static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                            grpc_fd *fd) {
   gpr_mu_lock(&pollset->mu);
-  pollset->vtable->add_fd(exec_ctx, pollset, fd, 1);
+  multipoll_with_epoll_pollset_add_fd(exec_ctx, pollset, fd, 1);
 /* the following (enabled only in debug) will reacquire and then release
    our lock - meaning that if the unlocking flag passed to add_fd above is
    not respected, the code will deadlock (in a way that we have a chance of
@@ -852,12 +856,21 @@ static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 #endif
 }
 
+/* TODO (sreek): Remove multipoll_with_epoll_finish_shutdown() declaration */
+static void multipoll_with_epoll_pollset_finish_shutdown(grpc_pollset *pollset);
+
 static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset) {
   GPR_ASSERT(grpc_closure_list_empty(pollset->idle_jobs));
-  pollset->vtable->finish_shutdown(pollset);
+  multipoll_with_epoll_pollset_finish_shutdown(pollset);
   grpc_exec_ctx_enqueue(exec_ctx, pollset->shutdown_done, true, NULL);
 }
 
+/* TODO(sreek): Remove multipoll_with_epoll_*_maybe_work_and_unlock declaration
+ */
+static void multipoll_with_epoll_pollset_maybe_work_and_unlock(
+    grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, grpc_pollset_worker *worker,
+    gpr_timespec deadline, gpr_timespec now);
+
 static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                          grpc_pollset_worker **worker_hdl, gpr_timespec now,
                          gpr_timespec deadline) {
@@ -915,8 +928,10 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
       }
       gpr_tls_set(&g_current_thread_poller, (intptr_t)pollset);
       GPR_TIMER_BEGIN("maybe_work_and_unlock", 0);
-      pollset->vtable->maybe_work_and_unlock(exec_ctx, pollset, &worker,
-                                             deadline, now);
+
+      multipoll_with_epoll_pollset_maybe_work_and_unlock(
+          exec_ctx, pollset, &worker, deadline, now);
+
       GPR_TIMER_END("maybe_work_and_unlock", 0);
       locked = 0;
       gpr_tls_set(&g_current_thread_poller, 0);
@@ -1013,233 +1028,6 @@ static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
       timeout, gpr_time_from_nanos(GPR_NS_PER_MS - 1, GPR_TIMESPAN)));
 }
 
-/*
- * basic_pollset - a vtable that provides polling for zero or one file
- *                 descriptor via poll()
- */
-
-typedef struct grpc_unary_promote_args {
-  const grpc_pollset_vtable *original_vtable;
-  grpc_pollset *pollset;
-  grpc_fd *fd;
-  grpc_closure promotion_closure;
-} grpc_unary_promote_args;
-
-static void basic_do_promote(grpc_exec_ctx *exec_ctx, void *args,
-                             bool success) {
-  grpc_unary_promote_args *up_args = args;
-  const grpc_pollset_vtable *original_vtable = up_args->original_vtable;
-  grpc_pollset *pollset = up_args->pollset;
-  grpc_fd *fd = up_args->fd;
-
-  /*
-   * This is quite tricky. There are a number of cases to keep in mind here:
-   * 1. fd may have been orphaned
-   * 2. The pollset may no longer be a unary poller (and we can't let case #1
-   * leak to other pollset types!)
-   * 3. pollset's fd (which may have changed) may have been orphaned
-   * 4. The pollset may be shutting down.
-   */
-
-  gpr_mu_lock(&pollset->mu);
-  /* First we need to ensure that nobody is polling concurrently */
-  GPR_ASSERT(!pollset_has_workers(pollset));
-
-  gpr_free(up_args);
-  /* At this point the pollset may no longer be a unary poller. In that case
-   * we should just call the right add function and be done. */
-  /* TODO(klempner): If we're not careful this could cause infinite recursion.
-   * That's not a problem for now because empty_pollset has a trivial poller
-   * and we don't have any mechanism to unbecome multipoller. */
-  pollset->in_flight_cbs--;
-  if (pollset->shutting_down) {
-    /* We don't care about this pollset anymore. */
-    if (pollset->in_flight_cbs == 0 && !pollset->called_shutdown) {
-      pollset->called_shutdown = 1;
-      finish_shutdown(exec_ctx, pollset);
-    }
-  } else if (fd_is_orphaned(fd)) {
-    /* Don't try to add it to anything, we'll drop our ref on it below */
-  } else if (pollset->vtable != original_vtable) {
-    pollset->vtable->add_fd(exec_ctx, pollset, fd, 0);
-  } else if (fd != pollset->data.ptr) {
-    grpc_fd *fds[2];
-    fds[0] = pollset->data.ptr;
-    fds[1] = fd;
-
-    if (fds[0] && !fd_is_orphaned(fds[0])) {
-      platform_become_multipoller(exec_ctx, pollset, fds, GPR_ARRAY_SIZE(fds));
-      GRPC_FD_UNREF(fds[0], "basicpoll");
-    } else {
-      /* old fd is orphaned and we haven't cleaned it up until now, so remain a
-       * unary poller */
-      /* Note that it is possible that fds[1] is also orphaned at this point.
-       * That's okay, we'll correct it at the next add or poll. */
-      if (fds[0]) GRPC_FD_UNREF(fds[0], "basicpoll");
-      pollset->data.ptr = fd;
-      GRPC_FD_REF(fd, "basicpoll");
-    }
-  }
-
-  gpr_mu_unlock(&pollset->mu);
-
-  /* Matching ref in basic_pollset_add_fd */
-  GRPC_FD_UNREF(fd, "basicpoll_add");
-}
-
-static void basic_pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                                 grpc_fd *fd, int and_unlock_pollset) {
-  grpc_unary_promote_args *up_args;
-  GPR_ASSERT(fd);
-  if (fd == pollset->data.ptr) goto exit;
-
-  if (!pollset_has_workers(pollset)) {
-    /* Fast path -- no in flight cbs */
-    /* TODO(klempner): Comment this out and fix any test failures or establish
-     * they are due to timing issues */
-    grpc_fd *fds[2];
-    fds[0] = pollset->data.ptr;
-    fds[1] = fd;
-
-    if (fds[0] == NULL) {
-      pollset->data.ptr = fd;
-      GRPC_FD_REF(fd, "basicpoll");
-    } else if (!fd_is_orphaned(fds[0])) {
-      platform_become_multipoller(exec_ctx, pollset, fds, GPR_ARRAY_SIZE(fds));
-      GRPC_FD_UNREF(fds[0], "basicpoll");
-    } else {
-      /* old fd is orphaned and we haven't cleaned it up until now, so remain a
-       * unary poller */
-      GRPC_FD_UNREF(fds[0], "basicpoll");
-      pollset->data.ptr = fd;
-      GRPC_FD_REF(fd, "basicpoll");
-    }
-    goto exit;
-  }
-
-  /* Now we need to promote. This needs to happen when we're not polling. Since
-   * this may be called from poll, the wait needs to happen asynchronously. */
-  GRPC_FD_REF(fd, "basicpoll_add");
-  pollset->in_flight_cbs++;
-  up_args = gpr_malloc(sizeof(*up_args));
-  up_args->fd = fd;
-  up_args->original_vtable = pollset->vtable;
-  up_args->pollset = pollset;
-  up_args->promotion_closure.cb = basic_do_promote;
-  up_args->promotion_closure.cb_arg = up_args;
-
-  grpc_closure_list_add(&pollset->idle_jobs, &up_args->promotion_closure, 1);
-  pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
-
-exit:
-  if (and_unlock_pollset) {
-    gpr_mu_unlock(&pollset->mu);
-  }
-}
-
-static void basic_pollset_maybe_work_and_unlock(grpc_exec_ctx *exec_ctx,
-                                                grpc_pollset *pollset,
-                                                grpc_pollset_worker *worker,
-                                                gpr_timespec deadline,
-                                                gpr_timespec now) {
-#define POLLOUT_CHECK (POLLOUT | POLLHUP | POLLERR)
-#define POLLIN_CHECK (POLLIN | POLLHUP | POLLERR)
-
-  struct pollfd pfd[3];
-  grpc_fd *fd;
-  grpc_fd_watcher fd_watcher;
-  int timeout;
-  int r;
-  nfds_t nfds;
-
-  fd = pollset->data.ptr;
-  if (fd && fd_is_orphaned(fd)) {
-    GRPC_FD_UNREF(fd, "basicpoll");
-    fd = pollset->data.ptr = NULL;
-  }
-  timeout = poll_deadline_to_millis_timeout(deadline, now);
-  pfd[0].fd = GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd);
-  pfd[0].events = POLLIN;
-  pfd[0].revents = 0;
-  pfd[1].fd = GRPC_WAKEUP_FD_GET_READ_FD(&worker->wakeup_fd->fd);
-  pfd[1].events = POLLIN;
-  pfd[1].revents = 0;
-  nfds = 2;
-  if (fd) {
-    pfd[2].fd = fd->fd;
-    pfd[2].revents = 0;
-    GRPC_FD_REF(fd, "basicpoll_begin");
-    gpr_mu_unlock(&pollset->mu);
-    pfd[2].events =
-        (short)fd_begin_poll(fd, pollset, worker, POLLIN, POLLOUT, &fd_watcher);
-    if (pfd[2].events != 0) {
-      nfds++;
-    }
-  } else {
-    gpr_mu_unlock(&pollset->mu);
-  }
-
-  /* TODO(vpai): Consider first doing a 0 timeout poll here to avoid
-     even going into the blocking annotation if possible */
-  /* poll fd count (argument 2) is shortened by one if we have no events
-     to poll on - such that it only includes the kicker */
-  GPR_TIMER_BEGIN("poll", 0);
-  GRPC_SCHEDULING_START_BLOCKING_REGION;
-  r = grpc_poll_function(pfd, nfds, timeout);
-  GRPC_SCHEDULING_END_BLOCKING_REGION;
-  GPR_TIMER_END("poll", 0);
-
-  if (r < 0) {
-    if (errno != EINTR) {
-      gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
-    }
-    if (fd) {
-      fd_end_poll(exec_ctx, &fd_watcher, 0, 0);
-    }
-  } else if (r == 0) {
-    if (fd) {
-      fd_end_poll(exec_ctx, &fd_watcher, 0, 0);
-    }
-  } else {
-    if (pfd[0].revents & POLLIN_CHECK) {
-      grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
-    }
-    if (pfd[1].revents & POLLIN_CHECK) {
-      grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd->fd);
-    }
-    if (nfds > 2) {
-      fd_end_poll(exec_ctx, &fd_watcher, pfd[2].revents & POLLIN_CHECK,
-                  pfd[2].revents & POLLOUT_CHECK);
-    } else if (fd) {
-      fd_end_poll(exec_ctx, &fd_watcher, 0, 0);
-    }
-  }
-
-  if (fd) {
-    GRPC_FD_UNREF(fd, "basicpoll_begin");
-  }
-}
-
-static void basic_pollset_destroy(grpc_pollset *pollset) {
-  if (pollset->data.ptr != NULL) {
-    GRPC_FD_UNREF(pollset->data.ptr, "basicpoll");
-    pollset->data.ptr = NULL;
-  }
-}
-
-static const grpc_pollset_vtable basic_pollset = {
-    basic_pollset_add_fd, basic_pollset_maybe_work_and_unlock,
-    basic_pollset_destroy, basic_pollset_destroy};
-
-static void become_basic_pollset(grpc_pollset *pollset, grpc_fd *fd_or_null) {
-  pollset->vtable = &basic_pollset;
-  pollset->data.ptr = fd_or_null;
-  if (fd_or_null != NULL) {
-    GRPC_FD_REF(fd_or_null, "basicpoll");
-  }
-}
-
-
 /*******************************************************************************
  * pollset_multipoller_with_epoll_posix.c
  */
@@ -1274,6 +1062,7 @@ static void fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
   set_ready(exec_ctx, fd, &fd->write_closure);
 }
 
+/* TODO (sreek): Maybe this global list is not required. Double check*/
 struct epoll_fd_list {
   int *epoll_fds;
   size_t count;
@@ -1390,10 +1179,48 @@ static void perform_delayed_add(grpc_exec_ctx *exec_ctx, void *arg,
   gpr_free(da);
 }
 
+/* Creates an epoll fd and initializes the pollset */
+static void multipoll_with_epoll_pollset_create_efd(grpc_exec_ctx *exec_ctx,
+                                                    grpc_pollset *pollset) {
+  epoll_hdr *h = gpr_malloc(sizeof(epoll_hdr));
+  struct epoll_event ev;
+  int err;
+
+  /* Ensuring that the pollset is infact empty (with no epoll fd either) */
+  GPR_ASSERT(pollset->data.ptr == NULL);
+
+  pollset->data.ptr = h;
+  h->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
+  if (h->epoll_fd < 0) {
+    gpr_log(GPR_ERROR, "epoll_create1 failed: %s", strerror(errno));
+    abort();
+  }
+  add_epoll_fd_to_global_list(h->epoll_fd);
+
+  ev.events = (uint32_t)(EPOLLIN | EPOLLET);
+  ev.data.ptr = NULL;
+
+  /* TODO (sreek): Double-check the use of grpc_global_wakeup_fd here (right now
+   * I do not know why this is used. I just copied this code from
+   * epoll_become_mutipoller() function in ev_poll_and_epoll_posix.c file */
+  err = epoll_ctl(h->epoll_fd, EPOLL_CTL_ADD,
+                  GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd), &ev);
+  if (err < 0) {
+    gpr_log(GPR_ERROR, "epoll_ctl add for %d failed: %s",
+            GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd),
+            strerror(errno));
+  }
+}
+
 static void multipoll_with_epoll_pollset_add_fd(grpc_exec_ctx *exec_ctx,
                                                 grpc_pollset *pollset,
                                                 grpc_fd *fd,
                                                 int and_unlock_pollset) {
+  /* If there is no epoll fd on the pollset, create one */
+  if (pollset->data.ptr == NULL) {
+    multipoll_with_epoll_pollset_create_efd(exec_ctx, pollset);
+  }
+
   if (and_unlock_pollset) {
     gpr_mu_unlock(&pollset->mu);
     finally_add_fd(exec_ctx, pollset, fd);
@@ -1500,45 +1327,6 @@ static void multipoll_with_epoll_pollset_destroy(grpc_pollset *pollset) {
   gpr_free(h);
 }
 
-static const grpc_pollset_vtable multipoll_with_epoll_pollset = {
-    multipoll_with_epoll_pollset_add_fd,
-    multipoll_with_epoll_pollset_maybe_work_and_unlock,
-    multipoll_with_epoll_pollset_finish_shutdown,
-    multipoll_with_epoll_pollset_destroy};
-
-static void epoll_become_multipoller(grpc_exec_ctx *exec_ctx,
-                                     grpc_pollset *pollset, grpc_fd **fds,
-                                     size_t nfds) {
-  size_t i;
-  epoll_hdr *h = gpr_malloc(sizeof(epoll_hdr));
-  struct epoll_event ev;
-  int err;
-
-  pollset->vtable = &multipoll_with_epoll_pollset;
-  pollset->data.ptr = h;
-  h->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
-  if (h->epoll_fd < 0) {
-    /* TODO(klempner): Fall back to poll here, especially on ENOSYS */
-    gpr_log(GPR_ERROR, "epoll_create1 failed: %s", strerror(errno));
-    abort();
-  }
-  add_epoll_fd_to_global_list(h->epoll_fd);
-
-  ev.events = (uint32_t)(EPOLLIN | EPOLLET);
-  ev.data.ptr = NULL;
-  err = epoll_ctl(h->epoll_fd, EPOLL_CTL_ADD,
-                  GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd), &ev);
-  if (err < 0) {
-    gpr_log(GPR_ERROR, "epoll_ctl add for %d failed: %s",
-            GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd),
-            strerror(errno));
-  }
-
-  for (i = 0; i < nfds; i++) {
-    multipoll_with_epoll_pollset_add_fd(exec_ctx, pollset, fds[i], 0);
-  }
-}
-
 /*******************************************************************************
  * pollset_set_posix.c
  */
@@ -1724,7 +1512,6 @@ static const grpc_event_engine_vtable vtable = {
 };
 
 const grpc_event_engine_vtable *grpc_init_epoll_posix(void) {
-  platform_become_multipoller = epoll_become_multipoller;
   fd_global_init();
   pollset_global_init();
   return &vtable;

From ab7f10ed61c7e0d104ea839206d2cd0340f5fed8 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Thu, 12 May 2016 20:21:37 -0700
Subject: [PATCH 011/280] Remove delayed_add

---
 src/core/lib/iomgr/ev_epoll_posix.c | 61 ++++++-----------------------
 1 file changed, 13 insertions(+), 48 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_posix.c b/src/core/lib/iomgr/ev_epoll_posix.c
index cb4a00a75c4..03c544b30c0 100644
--- a/src/core/lib/iomgr/ev_epoll_posix.c
+++ b/src/core/lib/iomgr/ev_epoll_posix.c
@@ -187,7 +187,7 @@ struct grpc_pollset_worker {
 struct grpc_pollset {
   gpr_mu mu;
   grpc_pollset_worker root_worker;
-  int in_flight_cbs;
+  int in_flight_cbs; /* TODO (sreek): Most likely this isn't needed anymore */
   int shutting_down;
   int called_shutdown;
   int kicked_without_pollers;
@@ -839,13 +839,12 @@ static void pollset_reset(grpc_pollset *pollset) {
 /* TODO (sreek): Remove multipoll_with_epoll_add_fd declaration*/
 static void multipoll_with_epoll_pollset_add_fd(grpc_exec_ctx *exec_ctx,
                                                 grpc_pollset *pollset,
-                                                grpc_fd *fd,
-                                                int and_unlock_pollset);
+                                                grpc_fd *fd);
 
 static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                            grpc_fd *fd) {
   gpr_mu_lock(&pollset->mu);
-  multipoll_with_epoll_pollset_add_fd(exec_ctx, pollset, fd, 1);
+  multipoll_with_epoll_pollset_add_fd(exec_ctx, pollset, fd);
 /* the following (enabled only in debug) will reacquire and then release
    our lock - meaning that if the unlocking flag passed to add_fd above is
    not respected, the code will deadlock (in a way that we have a chance of
@@ -1121,12 +1120,6 @@ static void remove_fd_from_all_epoll_sets(int fd) {
   gpr_mu_unlock(&epoll_fd_list_mu);
 }
 
-typedef struct {
-  grpc_pollset *pollset;
-  grpc_fd *fd;
-  grpc_closure closure;
-} delayed_add;
-
 typedef struct { int epoll_fd; } epoll_hdr;
 
 static void finally_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
@@ -1139,6 +1132,13 @@ static void finally_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   /* We pretend to be polling whilst adding an fd to keep the fd from being
      closed during the add. This may result in a spurious wakeup being assigned
      to this pollset whilst adding, but that should be benign. */
+  /* TODO (sreek). This fd_begin_poll() really seem to accomplish adding
+   * GRPC_FD_REF() (i.e adding a refcount to the fd) and checking that the
+   * fd is not shutting down (in which case watcher.fd will be NULL and no
+   * refcount is added). The ref count is added only durng hte duration of
+   * adding it to the epoll set (after which fd_end_poll would be called and
+   * the fd's ref count is decremented by 1. So do we still need fd_begin_poll
+   * ??? */
   GPR_ASSERT(fd_begin_poll(fd, pollset, NULL, 0, 0, &watcher) == 0);
   if (watcher.fd != NULL) {
     ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET);
@@ -1155,30 +1155,6 @@ static void finally_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   fd_end_poll(exec_ctx, &watcher, 0, 0);
 }
 
-static void perform_delayed_add(grpc_exec_ctx *exec_ctx, void *arg,
-                                bool iomgr_status) {
-  delayed_add *da = arg;
-
-  if (!fd_is_orphaned(da->fd)) {
-    finally_add_fd(exec_ctx, da->pollset, da->fd);
-  }
-
-  gpr_mu_lock(&da->pollset->mu);
-  da->pollset->in_flight_cbs--;
-  if (da->pollset->shutting_down) {
-    /* We don't care about this pollset anymore. */
-    if (da->pollset->in_flight_cbs == 0 && !da->pollset->called_shutdown) {
-      da->pollset->called_shutdown = 1;
-      grpc_exec_ctx_enqueue(exec_ctx, da->pollset->shutdown_done, true, NULL);
-    }
-  }
-  gpr_mu_unlock(&da->pollset->mu);
-
-  GRPC_FD_UNREF(da->fd, "delayed_add");
-
-  gpr_free(da);
-}
-
 /* Creates an epoll fd and initializes the pollset */
 static void multipoll_with_epoll_pollset_create_efd(grpc_exec_ctx *exec_ctx,
                                                     grpc_pollset *pollset) {
@@ -1214,25 +1190,14 @@ static void multipoll_with_epoll_pollset_create_efd(grpc_exec_ctx *exec_ctx,
 
 static void multipoll_with_epoll_pollset_add_fd(grpc_exec_ctx *exec_ctx,
                                                 grpc_pollset *pollset,
-                                                grpc_fd *fd,
-                                                int and_unlock_pollset) {
+                                                grpc_fd *fd) {
   /* If there is no epoll fd on the pollset, create one */
   if (pollset->data.ptr == NULL) {
     multipoll_with_epoll_pollset_create_efd(exec_ctx, pollset);
   }
 
-  if (and_unlock_pollset) {
-    gpr_mu_unlock(&pollset->mu);
-    finally_add_fd(exec_ctx, pollset, fd);
-  } else {
-    delayed_add *da = gpr_malloc(sizeof(*da));
-    da->pollset = pollset;
-    da->fd = fd;
-    GRPC_FD_REF(fd, "delayed_add");
-    grpc_closure_init(&da->closure, perform_delayed_add, da);
-    pollset->in_flight_cbs++;
-    grpc_exec_ctx_enqueue(exec_ctx, &da->closure, true, NULL);
-  }
+  gpr_mu_unlock(&pollset->mu);
+  finally_add_fd(exec_ctx, pollset, fd);
 }
 
 /* TODO(klempner): We probably want to turn this down a bit */

From f6a2adf0cfa14e473e05b6cb2d6b8fdc7667945b Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Fri, 13 May 2016 16:00:20 -0700
Subject: [PATCH 012/280] Pollset_reset should not destroy the epoll_fd

---
 src/core/lib/iomgr/ev_epoll_posix.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_posix.c b/src/core/lib/iomgr/ev_epoll_posix.c
index 03c544b30c0..19465280a1b 100644
--- a/src/core/lib/iomgr/ev_epoll_posix.c
+++ b/src/core/lib/iomgr/ev_epoll_posix.c
@@ -828,9 +828,6 @@ static void pollset_reset(grpc_pollset *pollset) {
   GPR_ASSERT(pollset->in_flight_cbs == 0);
   GPR_ASSERT(!pollset_has_workers(pollset));
   GPR_ASSERT(pollset->idle_jobs.head == pollset->idle_jobs.tail);
-
-  multipoll_with_epoll_pollset_destroy(pollset);
-
   pollset->shutting_down = 0;
   pollset->called_shutdown = 0;
   pollset->kicked_without_pollers = 0;

From 24f0f57ea16b77e710f7ff4ae8a048c888ab6b12 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Fri, 13 May 2016 19:22:44 -0700
Subject: [PATCH 013/280] Moving the creation of epoll_fd to pollset_init()
 instead of pollset_add_fd() [Verified stable. All tests pass]

---
 src/core/lib/iomgr/ev_epoll_posix.c | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_posix.c b/src/core/lib/iomgr/ev_epoll_posix.c
index 19465280a1b..0ee0ee58a8b 100644
--- a/src/core/lib/iomgr/ev_epoll_posix.c
+++ b/src/core/lib/iomgr/ev_epoll_posix.c
@@ -787,6 +787,9 @@ static void pollset_global_shutdown(void) {
 
 static void kick_poller(void) { grpc_wakeup_fd_wakeup(&grpc_global_wakeup_fd); }
 
+/* TODO: sreek. Try to Remove this forward declaration*/
+static void multipoll_with_epoll_pollset_create_efd(grpc_pollset *pollset);
+
 /* main interface */
 
 static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
@@ -800,7 +803,9 @@ static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
   pollset->idle_jobs.head = pollset->idle_jobs.tail = NULL;
   pollset->local_wakeup_cache = NULL;
   pollset->kicked_without_pollers = 0;
+
   pollset->data.ptr = NULL;
+  multipoll_with_epoll_pollset_create_efd(pollset);
 }
 
 /* TODO(sreek): Maybe merge multipoll_*_destroy() with pollset_destroy()
@@ -1153,13 +1158,15 @@ static void finally_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 }
 
 /* Creates an epoll fd and initializes the pollset */
-static void multipoll_with_epoll_pollset_create_efd(grpc_exec_ctx *exec_ctx,
-                                                    grpc_pollset *pollset) {
+/* TODO: This has to be called ONLY from pollset_init function. and hence it
+ * does not acquire any lock */
+static void multipoll_with_epoll_pollset_create_efd(grpc_pollset *pollset) {
   epoll_hdr *h = gpr_malloc(sizeof(epoll_hdr));
   struct epoll_event ev;
   int err;
 
-  /* Ensuring that the pollset is infact empty (with no epoll fd either) */
+  /* TODO (sreek). remove this assert. Currently added this just to ensure that
+   * we do not overwrite h->epoll_fd without freeing the older one*/
   GPR_ASSERT(pollset->data.ptr == NULL);
 
   pollset->data.ptr = h;
@@ -1188,10 +1195,10 @@ static void multipoll_with_epoll_pollset_create_efd(grpc_exec_ctx *exec_ctx,
 static void multipoll_with_epoll_pollset_add_fd(grpc_exec_ctx *exec_ctx,
                                                 grpc_pollset *pollset,
                                                 grpc_fd *fd) {
-  /* If there is no epoll fd on the pollset, create one */
-  if (pollset->data.ptr == NULL) {
-    multipoll_with_epoll_pollset_create_efd(exec_ctx, pollset);
-  }
+  GPR_ASSERT(pollset->data.ptr != NULL);
+
+  /* TODO(sreek). Remove this unlock code (and also the code that acquires the
+   * lock before calling multipoll_with_epoll_add_fd() function */
 
   gpr_mu_unlock(&pollset->mu);
   finally_add_fd(exec_ctx, pollset, fd);

From 9ff57f67a0920e8e39baedfec5671fb6e662d257 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Sat, 14 May 2016 15:56:57 -0700
Subject: [PATCH 014/280] Remove idle_jobs and in_flight_cbs from pollset

---
 src/core/lib/iomgr/ev_epoll_posix.c | 50 ++---------------------------
 1 file changed, 3 insertions(+), 47 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_posix.c b/src/core/lib/iomgr/ev_epoll_posix.c
index 0ee0ee58a8b..5776b6c1cf1 100644
--- a/src/core/lib/iomgr/ev_epoll_posix.c
+++ b/src/core/lib/iomgr/ev_epoll_posix.c
@@ -169,8 +169,6 @@ static void fd_global_shutdown(void);
  * pollset declarations
  */
 
-typedef struct grpc_pollset_vtable grpc_pollset_vtable;
-
 typedef struct grpc_cached_wakeup_fd {
   grpc_wakeup_fd fd;
   struct grpc_cached_wakeup_fd *next;
@@ -187,12 +185,10 @@ struct grpc_pollset_worker {
 struct grpc_pollset {
   gpr_mu mu;
   grpc_pollset_worker root_worker;
-  int in_flight_cbs; /* TODO (sreek): Most likely this isn't needed anymore */
   int shutting_down;
   int called_shutdown;
   int kicked_without_pollers;
   grpc_closure *shutdown_done;
-  grpc_closure_list idle_jobs;
   union {
     int fd;
     void *ptr;
@@ -201,16 +197,6 @@ struct grpc_pollset {
   grpc_cached_wakeup_fd *local_wakeup_cache;
 };
 
-struct grpc_pollset_vtable {
-  void (*add_fd)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                 struct grpc_fd *fd, int and_unlock_pollset);
-  void (*maybe_work_and_unlock)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                                grpc_pollset_worker *worker,
-                                gpr_timespec deadline, gpr_timespec now);
-  void (*finish_shutdown)(grpc_pollset *pollset);
-  void (*destroy)(grpc_pollset *pollset);
-};
-
 /* Add an fd to a pollset */
 static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                            struct grpc_fd *fd);
@@ -796,11 +782,9 @@ static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
   gpr_mu_init(&pollset->mu);
   *mu = &pollset->mu;
   pollset->root_worker.next = pollset->root_worker.prev = &pollset->root_worker;
-  pollset->in_flight_cbs = 0;
   pollset->shutting_down = 0;
   pollset->called_shutdown = 0;
   pollset->kicked_without_pollers = 0;
-  pollset->idle_jobs.head = pollset->idle_jobs.tail = NULL;
   pollset->local_wakeup_cache = NULL;
   pollset->kicked_without_pollers = 0;
 
@@ -813,9 +797,7 @@ static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
 static void multipoll_with_epoll_pollset_destroy(grpc_pollset *pollset);
 
 static void pollset_destroy(grpc_pollset *pollset) {
-  GPR_ASSERT(pollset->in_flight_cbs == 0);
   GPR_ASSERT(!pollset_has_workers(pollset));
-  GPR_ASSERT(pollset->idle_jobs.head == pollset->idle_jobs.tail);
 
   multipoll_with_epoll_pollset_destroy(pollset);
 
@@ -830,9 +812,7 @@ static void pollset_destroy(grpc_pollset *pollset) {
 
 static void pollset_reset(grpc_pollset *pollset) {
   GPR_ASSERT(pollset->shutting_down);
-  GPR_ASSERT(pollset->in_flight_cbs == 0);
   GPR_ASSERT(!pollset_has_workers(pollset));
-  GPR_ASSERT(pollset->idle_jobs.head == pollset->idle_jobs.tail);
   pollset->shutting_down = 0;
   pollset->called_shutdown = 0;
   pollset->kicked_without_pollers = 0;
@@ -861,7 +841,6 @@ static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 static void multipoll_with_epoll_pollset_finish_shutdown(grpc_pollset *pollset);
 
 static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset) {
-  GPR_ASSERT(grpc_closure_list_empty(pollset->idle_jobs));
   multipoll_with_epoll_pollset_finish_shutdown(pollset);
   grpc_exec_ctx_enqueue(exec_ctx, pollset->shutdown_done, true, NULL);
 }
@@ -895,26 +874,11 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
     grpc_wakeup_fd_init(&worker.wakeup_fd->fd);
   }
   worker.kicked_specifically = 0;
-  /* If there's work waiting for the pollset to be idle, and the
-     pollset is idle, then do that work */
-  if (!pollset_has_workers(pollset) &&
-      !grpc_closure_list_empty(pollset->idle_jobs)) {
-    GPR_TIMER_MARK("pollset_work.idle_jobs", 0);
-    grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs, NULL);
-    goto done;
-  }
   /* If we're shutting down then we don't execute any extended work */
   if (pollset->shutting_down) {
     GPR_TIMER_MARK("pollset_work.shutting_down", 0);
     goto done;
   }
-  /* Give do_promote priority so we don't starve it out */
-  if (pollset->in_flight_cbs) {
-    GPR_TIMER_MARK("pollset_work.in_flight_cbs", 0);
-    gpr_mu_unlock(&pollset->mu);
-    locked = 0;
-    goto done;
-  }
   /* Start polling, and keep doing so while we're being asked to
      re-evaluate our pollers (this allows poll() based pollers to
      ensure they don't miss wakeups) */
@@ -975,7 +939,7 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   if (pollset->shutting_down) {
     if (pollset_has_workers(pollset)) {
       pollset_kick(pollset, NULL);
-    } else if (!pollset->called_shutdown && pollset->in_flight_cbs == 0) {
+    } else if (!pollset->called_shutdown) {
       pollset->called_shutdown = 1;
       gpr_mu_unlock(&pollset->mu);
       finish_shutdown(exec_ctx, pollset);
@@ -985,11 +949,6 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
        * pollset_work.
        * TODO(dklempner): Can we refactor the shutdown logic to avoid this? */
       gpr_mu_lock(&pollset->mu);
-    } else if (!grpc_closure_list_empty(pollset->idle_jobs)) {
-      grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs, NULL);
-      gpr_mu_unlock(&pollset->mu);
-      grpc_exec_ctx_flush(exec_ctx);
-      gpr_mu_lock(&pollset->mu);
     }
   }
   *worker_hdl = NULL;
@@ -1002,11 +961,8 @@ static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   pollset->shutting_down = 1;
   pollset->shutdown_done = closure;
   pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
-  if (!pollset_has_workers(pollset)) {
-    grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs, NULL);
-  }
-  if (!pollset->called_shutdown && pollset->in_flight_cbs == 0 &&
-      !pollset_has_workers(pollset)) {
+
+  if (!pollset->called_shutdown && !pollset_has_workers(pollset)) {
     pollset->called_shutdown = 1;
     finish_shutdown(exec_ctx, pollset);
   }

From 97c2d6a269472a8a6e56d9e3d88f89bd27aff5ac Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Sat, 14 May 2016 16:33:16 -0700
Subject: [PATCH 015/280] Remove grpc_fd_watcher and related code from
 ev_epoll_posix.c

---
 src/core/lib/iomgr/ev_epoll_posix.c | 271 ++++------------------------
 1 file changed, 38 insertions(+), 233 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_posix.c b/src/core/lib/iomgr/ev_epoll_posix.c
index 5776b6c1cf1..920be1951fa 100644
--- a/src/core/lib/iomgr/ev_epoll_posix.c
+++ b/src/core/lib/iomgr/ev_epoll_posix.c
@@ -59,17 +59,6 @@
  * FD declarations
  */
 
-/* TODO(sreek) : Check if grpc_fd_watcher is needed (and if so, check if we can
- * share this between ev_poll_posix.h and ev_epoll_posix versions */
-
-typedef struct grpc_fd_watcher {
-  struct grpc_fd_watcher *next;
-  struct grpc_fd_watcher *prev;
-  grpc_pollset *pollset;
-  grpc_pollset_worker *worker;
-  grpc_fd *fd;
-} grpc_fd_watcher;
-
 struct grpc_fd {
   int fd;
   /* refst format:
@@ -84,32 +73,6 @@ struct grpc_fd {
   int closed;
   int released;
 
-  /* The watcher list.
-
-     The following watcher related fields are protected by watcher_mu.
-
-     An fd_watcher is an ephemeral object created when an fd wants to
-     begin polling, and destroyed after the poll.
-
-     It denotes the fd's interest in whether to read poll or write poll
-     or both or neither on this fd.
-
-     If a watcher is asked to poll for reads or writes, the read_watcher
-     or write_watcher fields are set respectively. A watcher may be asked
-     to poll for both, in which case both fields will be set.
-
-     read_watcher and write_watcher may be NULL if no watcher has been
-     asked to poll for reads or writes.
-
-     If an fd_watcher is not asked to poll for reads or writes, it's added
-     to a linked list of inactive watchers, rooted at inactive_watcher_root.
-     If at a later time there becomes need of a poller to poll, one of
-     the inactive pollers may be kicked out of their poll loops to take
-     that responsibility. */
-  grpc_fd_watcher inactive_watcher_root;
-  grpc_fd_watcher *read_watcher;
-  grpc_fd_watcher *write_watcher;
-
   grpc_closure *read_closure;
   grpc_closure *write_closure;
 
@@ -120,27 +83,6 @@ struct grpc_fd {
   grpc_iomgr_object iomgr_object;
 };
 
-/* Begin polling on an fd.
-   Registers that the given pollset is interested in this fd - so that if read
-   or writability interest changes, the pollset can be kicked to pick up that
-   new interest.
-   Return value is:
-     (fd_needs_read? read_mask : 0) | (fd_needs_write? write_mask : 0)
-   i.e. a combination of read_mask and write_mask determined by the fd's current
-   interest in said events.
-   Polling strategies that do not need to alter their behavior depending on the
-   fd's current interest (such as epoll) do not need to call this function.
-   MUST NOT be called with a pollset lock taken */
-static uint32_t fd_begin_poll(grpc_fd *fd, grpc_pollset *pollset,
-                              grpc_pollset_worker *worker, uint32_t read_mask,
-                              uint32_t write_mask, grpc_fd_watcher *rec);
-/* Complete polling previously started with fd_begin_poll
-   MUST NOT be called with a pollset lock taken
-   if got_read or got_write are 1, also does the become_{readable,writable} as
-   appropriate. */
-static void fd_end_poll(grpc_exec_ctx *exec_ctx, grpc_fd_watcher *rec,
-                        int got_read, int got_write);
-
 /* Return 1 if this fd is orphaned, 0 otherwise */
 static bool fd_is_orphaned(grpc_fd *fd);
 
@@ -307,10 +249,7 @@ static grpc_fd *alloc_fd(int fd) {
   r->read_closure = CLOSURE_NOT_READY;
   r->write_closure = CLOSURE_NOT_READY;
   r->fd = fd;
-  r->inactive_watcher_root.next = r->inactive_watcher_root.prev =
-      &r->inactive_watcher_root;
   r->freelist_next = NULL;
-  r->read_watcher = r->write_watcher = NULL;
   r->on_done_closure = NULL;
   r->closed = 0;
   r->released = 0;
@@ -387,43 +326,6 @@ static bool fd_is_orphaned(grpc_fd *fd) {
   return (gpr_atm_acq_load(&fd->refst) & 1) == 0;
 }
 
-static void pollset_kick_locked(grpc_fd_watcher *watcher) {
-  gpr_mu_lock(&watcher->pollset->mu);
-  GPR_ASSERT(watcher->worker);
-  pollset_kick_ext(watcher->pollset, watcher->worker,
-                   GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP);
-  gpr_mu_unlock(&watcher->pollset->mu);
-}
-
-static void maybe_wake_one_watcher_locked(grpc_fd *fd) {
-  if (fd->inactive_watcher_root.next != &fd->inactive_watcher_root) {
-    pollset_kick_locked(fd->inactive_watcher_root.next);
-  } else if (fd->read_watcher) {
-    pollset_kick_locked(fd->read_watcher);
-  } else if (fd->write_watcher) {
-    pollset_kick_locked(fd->write_watcher);
-  }
-}
-
-static void wake_all_watchers_locked(grpc_fd *fd) {
-  grpc_fd_watcher *watcher;
-  for (watcher = fd->inactive_watcher_root.next;
-       watcher != &fd->inactive_watcher_root; watcher = watcher->next) {
-    pollset_kick_locked(watcher);
-  }
-  if (fd->read_watcher) {
-    pollset_kick_locked(fd->read_watcher);
-  }
-  if (fd->write_watcher && fd->write_watcher != fd->read_watcher) {
-    pollset_kick_locked(fd->write_watcher);
-  }
-}
-
-static int has_watchers(grpc_fd *fd) {
-  return fd->read_watcher != NULL || fd->write_watcher != NULL ||
-         fd->inactive_watcher_root.next != &fd->inactive_watcher_root;
-}
-
 static void close_fd_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
   fd->closed = 1;
   if (!fd->released) {
@@ -454,11 +356,7 @@ static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
   }
   gpr_mu_lock(&fd->mu);
   REF_BY(fd, 1, reason); /* remove active status, but keep referenced */
-  if (!has_watchers(fd)) {
-    close_fd_locked(exec_ctx, fd);
-  } else {
-    wake_all_watchers_locked(fd);
-  }
+  close_fd_locked(exec_ctx, fd);
   gpr_mu_unlock(&fd->mu);
   UNREF_BY(fd, 2, reason); /* drop the reference */
 }
@@ -489,7 +387,6 @@ static void notify_on_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
     /* already ready ==> queue the closure to run immediately */
     *st = CLOSURE_NOT_READY;
     grpc_exec_ctx_enqueue(exec_ctx, closure, !fd->shutdown, NULL);
-    maybe_wake_one_watcher_locked(fd);
   } else {
     /* upcallptr was set to a different closure.  This is an error! */
     gpr_log(GPR_ERROR,
@@ -540,111 +437,6 @@ static void fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
   gpr_mu_unlock(&fd->mu);
 }
 
-static uint32_t fd_begin_poll(grpc_fd *fd, grpc_pollset *pollset,
-                              grpc_pollset_worker *worker, uint32_t read_mask,
-                              uint32_t write_mask, grpc_fd_watcher *watcher) {
-  uint32_t mask = 0;
-  grpc_closure *cur;
-  int requested;
-  /* keep track of pollers that have requested our events, in case they change
-   */
-  GRPC_FD_REF(fd, "poll");
-
-  gpr_mu_lock(&fd->mu);
-
-  /* if we are shutdown, then don't add to the watcher set */
-  if (fd->shutdown) {
-    watcher->fd = NULL;
-    watcher->pollset = NULL;
-    watcher->worker = NULL;
-    gpr_mu_unlock(&fd->mu);
-    GRPC_FD_UNREF(fd, "poll");
-    return 0;
-  }
-
-  /* if there is nobody polling for read, but we need to, then start doing so */
-  cur = fd->read_closure;
-  requested = cur != CLOSURE_READY;
-  if (read_mask && fd->read_watcher == NULL && requested) {
-    fd->read_watcher = watcher;
-    mask |= read_mask;
-  }
-  /* if there is nobody polling for write, but we need to, then start doing so
-   */
-  cur = fd->write_closure;
-  requested = cur != CLOSURE_READY;
-  if (write_mask && fd->write_watcher == NULL && requested) {
-    fd->write_watcher = watcher;
-    mask |= write_mask;
-  }
-  /* if not polling, remember this watcher in case we need someone to later */
-  if (mask == 0 && worker != NULL) {
-    watcher->next = &fd->inactive_watcher_root;
-    watcher->prev = watcher->next->prev;
-    watcher->next->prev = watcher->prev->next = watcher;
-  }
-  watcher->pollset = pollset;
-  watcher->worker = worker;
-  watcher->fd = fd;
-  gpr_mu_unlock(&fd->mu);
-
-  return mask;
-}
-
-static void fd_end_poll(grpc_exec_ctx *exec_ctx, grpc_fd_watcher *watcher,
-                        int got_read, int got_write) {
-  int was_polling = 0;
-  int kick = 0;
-  grpc_fd *fd = watcher->fd;
-
-  if (fd == NULL) {
-    return;
-  }
-
-  gpr_mu_lock(&fd->mu);
-
-  if (watcher == fd->read_watcher) {
-    /* remove read watcher, kick if we still need a read */
-    was_polling = 1;
-    if (!got_read) {
-      kick = 1;
-    }
-    fd->read_watcher = NULL;
-  }
-  if (watcher == fd->write_watcher) {
-    /* remove write watcher, kick if we still need a write */
-    was_polling = 1;
-    if (!got_write) {
-      kick = 1;
-    }
-    fd->write_watcher = NULL;
-  }
-  if (!was_polling && watcher->worker != NULL) {
-    /* remove from inactive list */
-    watcher->next->prev = watcher->prev;
-    watcher->prev->next = watcher->next;
-  }
-  if (got_read) {
-    if (set_ready_locked(exec_ctx, fd, &fd->read_closure)) {
-      kick = 1;
-    }
-  }
-  if (got_write) {
-    if (set_ready_locked(exec_ctx, fd, &fd->write_closure)) {
-      kick = 1;
-    }
-  }
-  if (kick) {
-    maybe_wake_one_watcher_locked(fd);
-  }
-  if (fd_is_orphaned(fd) && !has_watchers(fd) && !fd->closed) {
-    close_fd_locked(exec_ctx, fd);
-  }
-  gpr_mu_unlock(&fd->mu);
-
-  GRPC_FD_UNREF(fd, "poll");
-}
-
 /*******************************************************************************
  * pollset_posix.c
  */
@@ -1085,32 +877,45 @@ static void finally_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   epoll_hdr *h = pollset->data.ptr;
   struct epoll_event ev;
   int err;
-  grpc_fd_watcher watcher;
-
-  /* We pretend to be polling whilst adding an fd to keep the fd from being
-     closed during the add. This may result in a spurious wakeup being assigned
-     to this pollset whilst adding, but that should be benign. */
-  /* TODO (sreek). This fd_begin_poll() really seem to accomplish adding
-   * GRPC_FD_REF() (i.e adding a refcount to the fd) and checking that the
-   * fd is not shutting down (in which case watcher.fd will be NULL and no
-   * refcount is added). The ref count is added only durng hte duration of
-   * adding it to the epoll set (after which fd_end_poll would be called and
-   * the fd's ref count is decremented by 1. So do we still need fd_begin_poll
-   * ??? */
-  GPR_ASSERT(fd_begin_poll(fd, pollset, NULL, 0, 0, &watcher) == 0);
-  if (watcher.fd != NULL) {
-    ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET);
-    ev.data.ptr = fd;
-    err = epoll_ctl(h->epoll_fd, EPOLL_CTL_ADD, fd->fd, &ev);
-    if (err < 0) {
-      /* FDs may be added to a pollset multiple times, so EEXIST is normal. */
-      if (errno != EEXIST) {
-        gpr_log(GPR_ERROR, "epoll_ctl add for %d failed: %s", fd->fd,
-                strerror(errno));
-      }
+
+  /* Hold a ref to the fd to keep it from being closed during the add. This may
+     result in a spurious wakeup being assigned to this pollset whilst adding,
+     but that should be benign. */
+  /* TODO: (sreek): Understand how a spurious wake up migh be assinged to this
+   * pollset..and how holding a reference will prevent the fd from being closed
+   * (and perhaps more importantly, see how can an fd be closed while being
+   * added to the epollset */
+  GRPC_FD_REF(fd, "add fd");
+
+  gpr_mu_lock(&fd->mu);
+  if (fd->shutdown) {
+    gpr_mu_unlock(&fd->mu);
+    GRPC_FD_UNREF(fd, "add fd");
+    return;
+  }
+  gpr_mu_unlock(&fd->mu);
+
+  ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET);
+  ev.data.ptr = fd;
+  err = epoll_ctl(h->epoll_fd, EPOLL_CTL_ADD, fd->fd, &ev);
+  if (err < 0) {
+    /* FDs may be added to a pollset multiple times, so EEXIST is normal. */
+    if (errno != EEXIST) {
+      gpr_log(GPR_ERROR, "epoll_ctl add for %d failed: %s", fd->fd,
+              strerror(errno));
     }
   }
-  fd_end_poll(exec_ctx, &watcher, 0, 0);
+
+  /* The fd might have been orphaned while we were adding it to the epoll set.
+     Close the fd in such a case (which will also take care of removing it from
+     the epoll set */
+  gpr_mu_lock(&fd->mu);
+  if (fd_is_orphaned(fd) && !fd->closed) {
+    close_fd_locked(exec_ctx, fd);
+  }
+  gpr_mu_unlock(&fd->mu);
+
+  GRPC_FD_UNREF(fd, "add fd");
 }
 
 /* Creates an epoll fd and initializes the pollset */

From e9ee1f34b8efdc47ea12821351e5cc23125d62b2 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Sat, 14 May 2016 17:22:10 -0700
Subject: [PATCH 016/280] Minor refactor of add_fd path

---
 src/core/lib/iomgr/ev_epoll_posix.c | 24 +++++++-----------------
 1 file changed, 7 insertions(+), 17 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_posix.c b/src/core/lib/iomgr/ev_epoll_posix.c
index 920be1951fa..15126b3b62a 100644
--- a/src/core/lib/iomgr/ev_epoll_posix.c
+++ b/src/core/lib/iomgr/ev_epoll_posix.c
@@ -617,16 +617,13 @@ static void multipoll_with_epoll_pollset_add_fd(grpc_exec_ctx *exec_ctx,
 
 static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                            grpc_fd *fd) {
+  /* TODO (sreek) - Does reading pollset->data.ptr need pollset->mu lock ?
+   * because finally_add_fd() also reads it but without the lock! */
   gpr_mu_lock(&pollset->mu);
-  multipoll_with_epoll_pollset_add_fd(exec_ctx, pollset, fd);
-/* the following (enabled only in debug) will reacquire and then release
-   our lock - meaning that if the unlocking flag passed to add_fd above is
-   not respected, the code will deadlock (in a way that we have a chance of
-   debugging) */
-#ifndef NDEBUG
-  gpr_mu_lock(&pollset->mu);
+  GPR_ASSERT(pollset->data.ptr != NULL);
   gpr_mu_unlock(&pollset->mu);
-#endif
+
+  multipoll_with_epoll_pollset_add_fd(exec_ctx, pollset, fd);
 }
 
 /* TODO (sreek): Remove multipoll_with_epoll_finish_shutdown() declaration */
@@ -874,6 +871,8 @@ typedef struct { int epoll_fd; } epoll_hdr;
 
 static void finally_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                            grpc_fd *fd) {
+  /*TODO: (sree) Shouldn't this read (pollset->data.ptr) be done under a
+    pollset lock - i.e pollset->mu ? */
   epoll_hdr *h = pollset->data.ptr;
   struct epoll_event ev;
   int err;
@@ -941,9 +940,6 @@ static void multipoll_with_epoll_pollset_create_efd(grpc_pollset *pollset) {
   ev.events = (uint32_t)(EPOLLIN | EPOLLET);
   ev.data.ptr = NULL;
 
-  /* TODO (sreek): Double-check the use of grpc_global_wakeup_fd here (right now
-   * I do not know why this is used. I just copied this code from
-   * epoll_become_mutipoller() function in ev_poll_and_epoll_posix.c file */
   err = epoll_ctl(h->epoll_fd, EPOLL_CTL_ADD,
                   GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd), &ev);
   if (err < 0) {
@@ -956,12 +952,6 @@ static void multipoll_with_epoll_pollset_create_efd(grpc_pollset *pollset) {
 static void multipoll_with_epoll_pollset_add_fd(grpc_exec_ctx *exec_ctx,
                                                 grpc_pollset *pollset,
                                                 grpc_fd *fd) {
-  GPR_ASSERT(pollset->data.ptr != NULL);
-
-  /* TODO(sreek). Remove this unlock code (and also the code that acquires the
-   * lock before calling multipoll_with_epoll_add_fd() function */
-
-  gpr_mu_unlock(&pollset->mu);
   finally_add_fd(exec_ctx, pollset, fd);
 }
 

From c22eb5ac4dbf44209f0d431b6d1e9267210e0120 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Sat, 14 May 2016 19:22:36 -0700
Subject: [PATCH 017/280] Add epoll polling strategy to run_tests.py

---
 tools/run_tests/run_tests.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 0538dce4198..ddaf96c345a 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -892,7 +892,7 @@ for l in languages:
 
 language_make_options=[]
 if any(language.make_options() for language in languages):
-  if not 'gcov' in args.config and len(languages) != 1:
+  if len(languages) != 1:
     print 'languages with custom make options cannot be built simultaneously with other languages'
     sys.exit(1)
   else:

From 2ea165911b23099499da0af48088c47c47d659ba Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Tue, 17 May 2016 09:37:48 -0700
Subject: [PATCH 018/280] experiment with signals

---
 src/core/lib/iomgr/ev_epoll_posix.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/core/lib/iomgr/ev_epoll_posix.c b/src/core/lib/iomgr/ev_epoll_posix.c
index 15126b3b62a..4481bab4380 100644
--- a/src/core/lib/iomgr/ev_epoll_posix.c
+++ b/src/core/lib/iomgr/ev_epoll_posix.c
@@ -40,6 +40,7 @@
 #include <assert.h>
 #include <errno.h>
 #include <poll.h>
+#include <signal.h>
 #include <string.h>
 #include <sys/socket.h>
 #include <unistd.h>
@@ -120,6 +121,7 @@ struct grpc_pollset_worker {
   grpc_cached_wakeup_fd *wakeup_fd;
   int reevaluate_polling_on_wakeup;
   int kicked_specifically;
+  pthread_t pt_id;
   struct grpc_pollset_worker *next;
   struct grpc_pollset_worker *prev;
 };
@@ -506,6 +508,8 @@ static void pollset_kick_ext(grpc_pollset *p,
       }
       specific_worker->kicked_specifically = 1;
       grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
+      /* TODO (sreek): Refactor this into a separate file*/
+      pthread_kill(specific_worker->pt_id, SIGUSR1);
     } else if ((flags & GRPC_POLLSET_CAN_KICK_SELF) != 0) {
       GPR_TIMER_MARK("kick_yoself", 0);
       if ((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) != 0) {
@@ -551,10 +555,15 @@ static void pollset_kick(grpc_pollset *p,
 
 /* global state management */
 
+static void sig_handler(int sig_num) {
+  gpr_log(GPR_INFO, "Received signal %d", sig_num);
+}
+
 static void pollset_global_init(void) {
   gpr_tls_init(&g_current_thread_poller);
   gpr_tls_init(&g_current_thread_worker);
   grpc_wakeup_fd_init(&grpc_global_wakeup_fd);
+  signal(SIGUSR1, sig_handler);
 }
 
 static void pollset_global_shutdown(void) {
@@ -663,6 +672,9 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
     grpc_wakeup_fd_init(&worker.wakeup_fd->fd);
   }
   worker.kicked_specifically = 0;
+
+  /* TODO(sreek): Abstract this thread id stuff out into a separate file */
+  worker.pt_id = pthread_self();
   /* If we're shutting down then we don't execute any extended work */
   if (pollset->shutting_down) {
     GPR_TIMER_MARK("pollset_work.shutting_down", 0);

From f448c34a6839f75476900a4a2b24b2160fe4d164 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Thu, 19 May 2016 10:51:24 -0700
Subject: [PATCH 019/280] Remove union { } data and epoll_hdr structures. Added
 ev_epoll_linux files

---
 BUILD                                         |    6 +
 Makefile                                      |    2 +
 binding.gyp                                   |    1 +
 build.yaml                                    |    2 +
 config.m4                                     |    1 +
 gRPC.podspec                                  |    3 +
 grpc.gemspec                                  |    2 +
 package.xml                                   |    2 +
 src/core/lib/iomgr/ev_epoll_linux.c           | 1335 +++++++++++++++++
 src/core/lib/iomgr/ev_epoll_linux.h           |   41 +
 src/core/lib/iomgr/ev_epoll_posix.c           |   87 +-
 src/core/lib/iomgr/ev_posix.c                 |    7 +-
 src/python/grpcio/grpc_core_dependencies.py   |    1 +
 tools/doxygen/Doxyfile.core.internal          |    2 +
 tools/run_tests/sources_and_headers.json      |    3 +
 vsprojects/vcxproj/grpc/grpc.vcxproj          |    3 +
 vsprojects/vcxproj/grpc/grpc.vcxproj.filters  |    6 +
 .../grpc_unsecure/grpc_unsecure.vcxproj       |    3 +
 .../grpc_unsecure.vcxproj.filters             |    6 +
 19 files changed, 1442 insertions(+), 71 deletions(-)
 create mode 100644 src/core/lib/iomgr/ev_epoll_linux.c
 create mode 100644 src/core/lib/iomgr/ev_epoll_linux.h

diff --git a/BUILD b/BUILD
index 0be8f27a01b..a32352ebb30 100644
--- a/BUILD
+++ b/BUILD
@@ -178,6 +178,7 @@ cc_library(
     "src/core/lib/iomgr/closure.h",
     "src/core/lib/iomgr/endpoint.h",
     "src/core/lib/iomgr/endpoint_pair.h",
+    "src/core/lib/iomgr/ev_epoll_linux.h",
     "src/core/lib/iomgr/ev_epoll_posix.h",
     "src/core/lib/iomgr/ev_poll_posix.h",
     "src/core/lib/iomgr/ev_posix.h",
@@ -322,6 +323,7 @@ cc_library(
     "src/core/lib/iomgr/endpoint.c",
     "src/core/lib/iomgr/endpoint_pair_posix.c",
     "src/core/lib/iomgr/endpoint_pair_windows.c",
+    "src/core/lib/iomgr/ev_epoll_linux.c",
     "src/core/lib/iomgr/ev_epoll_posix.c",
     "src/core/lib/iomgr/ev_poll_posix.c",
     "src/core/lib/iomgr/ev_posix.c",
@@ -548,6 +550,7 @@ cc_library(
     "src/core/lib/iomgr/closure.h",
     "src/core/lib/iomgr/endpoint.h",
     "src/core/lib/iomgr/endpoint_pair.h",
+    "src/core/lib/iomgr/ev_epoll_linux.h",
     "src/core/lib/iomgr/ev_epoll_posix.h",
     "src/core/lib/iomgr/ev_poll_posix.h",
     "src/core/lib/iomgr/ev_posix.h",
@@ -669,6 +672,7 @@ cc_library(
     "src/core/lib/iomgr/endpoint.c",
     "src/core/lib/iomgr/endpoint_pair_posix.c",
     "src/core/lib/iomgr/endpoint_pair_windows.c",
+    "src/core/lib/iomgr/ev_epoll_linux.c",
     "src/core/lib/iomgr/ev_epoll_posix.c",
     "src/core/lib/iomgr/ev_poll_posix.c",
     "src/core/lib/iomgr/ev_posix.c",
@@ -1362,6 +1366,7 @@ objc_library(
     "src/core/lib/iomgr/endpoint.c",
     "src/core/lib/iomgr/endpoint_pair_posix.c",
     "src/core/lib/iomgr/endpoint_pair_windows.c",
+    "src/core/lib/iomgr/ev_epoll_linux.c",
     "src/core/lib/iomgr/ev_epoll_posix.c",
     "src/core/lib/iomgr/ev_poll_posix.c",
     "src/core/lib/iomgr/ev_posix.c",
@@ -1567,6 +1572,7 @@ objc_library(
     "src/core/lib/iomgr/closure.h",
     "src/core/lib/iomgr/endpoint.h",
     "src/core/lib/iomgr/endpoint_pair.h",
+    "src/core/lib/iomgr/ev_epoll_linux.h",
     "src/core/lib/iomgr/ev_epoll_posix.h",
     "src/core/lib/iomgr/ev_poll_posix.h",
     "src/core/lib/iomgr/ev_posix.h",
diff --git a/Makefile b/Makefile
index 29ebc0e5adf..063698d943f 100644
--- a/Makefile
+++ b/Makefile
@@ -2486,6 +2486,7 @@ LIBGRPC_SRC = \
     src/core/lib/iomgr/endpoint.c \
     src/core/lib/iomgr/endpoint_pair_posix.c \
     src/core/lib/iomgr/endpoint_pair_windows.c \
+    src/core/lib/iomgr/ev_epoll_linux.c \
     src/core/lib/iomgr/ev_epoll_posix.c \
     src/core/lib/iomgr/ev_poll_posix.c \
     src/core/lib/iomgr/ev_posix.c \
@@ -2841,6 +2842,7 @@ LIBGRPC_UNSECURE_SRC = \
     src/core/lib/iomgr/endpoint.c \
     src/core/lib/iomgr/endpoint_pair_posix.c \
     src/core/lib/iomgr/endpoint_pair_windows.c \
+    src/core/lib/iomgr/ev_epoll_linux.c \
     src/core/lib/iomgr/ev_epoll_posix.c \
     src/core/lib/iomgr/ev_poll_posix.c \
     src/core/lib/iomgr/ev_posix.c \
diff --git a/binding.gyp b/binding.gyp
index 89774ead4da..41e1b5bb416 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -581,6 +581,7 @@
         'src/core/lib/iomgr/endpoint.c',
         'src/core/lib/iomgr/endpoint_pair_posix.c',
         'src/core/lib/iomgr/endpoint_pair_windows.c',
+        'src/core/lib/iomgr/ev_epoll_linux.c',
         'src/core/lib/iomgr/ev_epoll_posix.c',
         'src/core/lib/iomgr/ev_poll_posix.c',
         'src/core/lib/iomgr/ev_posix.c',
diff --git a/build.yaml b/build.yaml
index 7ba65332972..2f3d07071da 100644
--- a/build.yaml
+++ b/build.yaml
@@ -165,6 +165,7 @@ filegroups:
   - src/core/lib/iomgr/closure.h
   - src/core/lib/iomgr/endpoint.h
   - src/core/lib/iomgr/endpoint_pair.h
+  - src/core/lib/iomgr/ev_epoll_linux.h
   - src/core/lib/iomgr/ev_epoll_posix.h
   - src/core/lib/iomgr/ev_poll_posix.h
   - src/core/lib/iomgr/ev_posix.h
@@ -240,6 +241,7 @@ filegroups:
   - src/core/lib/iomgr/endpoint.c
   - src/core/lib/iomgr/endpoint_pair_posix.c
   - src/core/lib/iomgr/endpoint_pair_windows.c
+  - src/core/lib/iomgr/ev_epoll_linux.c
   - src/core/lib/iomgr/ev_epoll_posix.c
   - src/core/lib/iomgr/ev_poll_posix.c
   - src/core/lib/iomgr/ev_posix.c
diff --git a/config.m4 b/config.m4
index 6987c741541..4308295afda 100644
--- a/config.m4
+++ b/config.m4
@@ -100,6 +100,7 @@ if test "$PHP_GRPC" != "no"; then
     src/core/lib/iomgr/endpoint.c \
     src/core/lib/iomgr/endpoint_pair_posix.c \
     src/core/lib/iomgr/endpoint_pair_windows.c \
+    src/core/lib/iomgr/ev_epoll_linux.c \
     src/core/lib/iomgr/ev_epoll_posix.c \
     src/core/lib/iomgr/ev_poll_posix.c \
     src/core/lib/iomgr/ev_posix.c \
diff --git a/gRPC.podspec b/gRPC.podspec
index 3b4dd52380e..de55880125a 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -181,6 +181,7 @@ Pod::Spec.new do |s|
                       'src/core/lib/iomgr/closure.h',
                       'src/core/lib/iomgr/endpoint.h',
                       'src/core/lib/iomgr/endpoint_pair.h',
+                      'src/core/lib/iomgr/ev_epoll_linux.h',
                       'src/core/lib/iomgr/ev_epoll_posix.h',
                       'src/core/lib/iomgr/ev_poll_posix.h',
                       'src/core/lib/iomgr/ev_posix.h',
@@ -359,6 +360,7 @@ Pod::Spec.new do |s|
                       'src/core/lib/iomgr/endpoint.c',
                       'src/core/lib/iomgr/endpoint_pair_posix.c',
                       'src/core/lib/iomgr/endpoint_pair_windows.c',
+                      'src/core/lib/iomgr/ev_epoll_linux.c',
                       'src/core/lib/iomgr/ev_epoll_posix.c',
                       'src/core/lib/iomgr/ev_poll_posix.c',
                       'src/core/lib/iomgr/ev_posix.c',
@@ -548,6 +550,7 @@ Pod::Spec.new do |s|
                               'src/core/lib/iomgr/closure.h',
                               'src/core/lib/iomgr/endpoint.h',
                               'src/core/lib/iomgr/endpoint_pair.h',
+                              'src/core/lib/iomgr/ev_epoll_linux.h',
                               'src/core/lib/iomgr/ev_epoll_posix.h',
                               'src/core/lib/iomgr/ev_poll_posix.h',
                               'src/core/lib/iomgr/ev_posix.h',
diff --git a/grpc.gemspec b/grpc.gemspec
index 71cccb6ca8d..54ae2eb68dd 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -190,6 +190,7 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/lib/iomgr/closure.h )
   s.files += %w( src/core/lib/iomgr/endpoint.h )
   s.files += %w( src/core/lib/iomgr/endpoint_pair.h )
+  s.files += %w( src/core/lib/iomgr/ev_epoll_linux.h )
   s.files += %w( src/core/lib/iomgr/ev_epoll_posix.h )
   s.files += %w( src/core/lib/iomgr/ev_poll_posix.h )
   s.files += %w( src/core/lib/iomgr/ev_posix.h )
@@ -338,6 +339,7 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/lib/iomgr/endpoint.c )
   s.files += %w( src/core/lib/iomgr/endpoint_pair_posix.c )
   s.files += %w( src/core/lib/iomgr/endpoint_pair_windows.c )
+  s.files += %w( src/core/lib/iomgr/ev_epoll_linux.c )
   s.files += %w( src/core/lib/iomgr/ev_epoll_posix.c )
   s.files += %w( src/core/lib/iomgr/ev_poll_posix.c )
   s.files += %w( src/core/lib/iomgr/ev_posix.c )
diff --git a/package.xml b/package.xml
index 0fc5d0dee47..d8e82a8bc37 100644
--- a/package.xml
+++ b/package.xml
@@ -197,6 +197,7 @@
     <file baseinstalldir="/" name="src/core/lib/iomgr/closure.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/endpoint.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/endpoint_pair.h" role="src" />
+    <file baseinstalldir="/" name="src/core/lib/iomgr/ev_epoll_linux.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/ev_epoll_posix.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/ev_poll_posix.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/ev_posix.h" role="src" />
@@ -345,6 +346,7 @@
     <file baseinstalldir="/" name="src/core/lib/iomgr/endpoint.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/endpoint_pair_posix.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/endpoint_pair_windows.c" role="src" />
+    <file baseinstalldir="/" name="src/core/lib/iomgr/ev_epoll_linux.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/ev_epoll_posix.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/ev_poll_posix.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/ev_posix.c" role="src" />
diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
new file mode 100644
index 00000000000..f257ac8a1dd
--- /dev/null
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -0,0 +1,1335 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_POSIX_SOCKET
+
+#include "src/core/lib/iomgr/ev_epoll_posix.h"
+
+#include <assert.h>
+#include <errno.h>
+#include <poll.h>
+#include <signal.h>
+#include <string.h>
+#include <sys/epoll.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/tls.h>
+#include <grpc/support/useful.h>
+
+#include "src/core/lib/iomgr/ev_posix.h"
+#include "src/core/lib/iomgr/iomgr_internal.h"
+#include "src/core/lib/iomgr/wakeup_fd_posix.h"
+#include "src/core/lib/profiling/timers.h"
+#include "src/core/lib/support/block_annotate.h"
+
+struct polling_island;
+
+/*******************************************************************************
+ * FD declarations
+ */
+
+struct grpc_fd {
+  int fd;
+  /* refst format:
+     bit0:   1=active/0=orphaned
+     bit1-n: refcount
+     meaning that mostly we ref by two to avoid altering the orphaned bit,
+     and just unref by 1 when we're ready to flag the object as orphaned */
+  gpr_atm refst;
+
+  gpr_mu mu;
+  int shutdown;
+  int closed;
+  int released;
+
+  grpc_closure *read_closure;
+  grpc_closure *write_closure;
+
+  /* Mutex protecting the 'polling_island' field */
+  gpr_mu pi_mu;
+
+  /* The polling island to which this fd belongs to. An fd belongs to exactly
+     one polling island */
+  struct polling_island *polling_island;
+
+  struct grpc_fd *freelist_next;
+
+  grpc_closure *on_done_closure;
+
+  grpc_iomgr_object iomgr_object;
+};
+
+/* Return 1 if this fd is orphaned, 0 otherwise */
+static bool fd_is_orphaned(grpc_fd *fd);
+
+/* Reference counting for fds */
+/*#define GRPC_FD_REF_COUNT_DEBUG*/
+#ifdef GRPC_FD_REF_COUNT_DEBUG
+static void fd_ref(grpc_fd *fd, const char *reason, const char *file, int line);
+static void fd_unref(grpc_fd *fd, const char *reason, const char *file,
+                     int line);
+#define GRPC_FD_REF(fd, reason) fd_ref(fd, reason, __FILE__, __LINE__)
+#define GRPC_FD_UNREF(fd, reason) fd_unref(fd, reason, __FILE__, __LINE__)
+#else
+static void fd_ref(grpc_fd *fd);
+static void fd_unref(grpc_fd *fd);
+#define GRPC_FD_REF(fd, reason) fd_ref(fd)
+#define GRPC_FD_UNREF(fd, reason) fd_unref(fd)
+#endif
+
+static void fd_global_init(void);
+static void fd_global_shutdown(void);
+
+#define CLOSURE_NOT_READY ((grpc_closure *)0)
+#define CLOSURE_READY ((grpc_closure *)1)
+
+/*******************************************************************************
+ * Polling Island
+ */
+typedef struct polling_island {
+  gpr_mu mu;
+  int ref_cnt;
+
+  /* Pointer to the polling_island this merged into. If this is not NULL, all
+     the remaining fields in this pollset (i.e all fields except mu and ref_cnt)
+     are considered invalid and must be ignored */
+  struct polling_island *merged_to;
+
+  /* The fd of the underlying epoll set */
+  int epoll_fd;
+
+  /* The file descriptors in the epoll set */
+  size_t fd_cnt;
+  size_t fd_capacity;
+  grpc_fd **fds;
+
+  /* Polling islands that are no longer needed are kept in a freelist so that
+     they can be reused. This field points to the next polling island in the
+     free list. Note that this is only used if the polling island is in the
+     free list */
+  struct polling_island *next_free;
+} polling_island;
+
+/* Polling island freelist */
+static gpr_mu g_pi_freelist_mu;
+static polling_island *g_pi_freelist = NULL;
+
+/* TODO: sreek - Should we hold a lock on fd or add a ref to the fd ? */
+static void add_fd_to_polling_island_locked(polling_island *pi, grpc_fd *fd) {
+  int err;
+  struct epoll_event ev;
+
+  ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET);
+  ev.data.ptr = fd;
+  err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_ADD, fd->fd, &ev);
+
+  if (err < 0 && errno != EEXIST) {
+    gpr_log(GPR_ERROR, "epoll_ctl add for fd: %d failed with error: %s", fd->fd,
+            strerror(errno));
+    return;
+  }
+
+  pi->fd_capacity = GPR_MAX(pi->fd_capacity + 8, pi->fd_cnt * 3 / 2);
+  pi->fds = gpr_realloc(pi->fds, sizeof(grpc_fd *) * pi->fd_capacity);
+  pi->fds[pi->fd_cnt++] = fd;
+}
+
+static polling_island *polling_island_create(int initial_ref_cnt,
+                                             grpc_fd *initial_fd) {
+  polling_island *pi = NULL;
+  gpr_mu_lock(&g_pi_freelist_mu);
+  if (g_pi_freelist != NULL) {
+    pi = g_pi_freelist;
+    g_pi_freelist = g_pi_freelist->next_free;
+    pi->next_free = NULL;
+  }
+  gpr_mu_unlock(&g_pi_freelist_mu);
+
+  /* Create new polling island if we could not get one from the free list */
+  if (pi == NULL) {
+    pi = gpr_malloc(sizeof(*pi));
+    gpr_mu_init(&pi->mu);
+    pi->fd_cnt = 0;
+    pi->fd_capacity = 0;
+    pi->fds = NULL;
+
+    pi->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
+    if (pi->epoll_fd < 0) {
+      gpr_log(GPR_ERROR, "epoll_create1() failed with error: %s",
+              strerror(errno));
+    }
+    GPR_ASSERT(pi->epoll_fd >= 0);
+  }
+
+  pi->ref_cnt = initial_ref_cnt;
+  pi->merged_to = NULL;
+  pi->next_free = NULL;
+
+  if (initial_fd != NULL) {
+    /* add_fd_to_polling_island_locked() expects the caller to hold a pi->mu
+     * lock. However, since this is a new polling island (and no one has a
+     * reference to it yet), it is okay to not acquire pi->mu here */
+    add_fd_to_polling_island_locked(pi, initial_fd);
+  }
+
+  return pi;
+}
+
+static void polling_island_global_init() {
+  polling_island_create(0, NULL); /* TODO(sreek): Delete this line */
+  gpr_mu_init(&g_pi_freelist_mu);
+  g_pi_freelist = NULL;
+}
+
+/*******************************************************************************
+ * pollset declarations
+ */
+
+typedef struct grpc_cached_wakeup_fd {
+  grpc_wakeup_fd fd;
+  struct grpc_cached_wakeup_fd *next;
+} grpc_cached_wakeup_fd;
+
+struct grpc_pollset_worker {
+  grpc_cached_wakeup_fd *wakeup_fd;
+  int reevaluate_polling_on_wakeup;
+  int kicked_specifically;
+  pthread_t pt_id;
+  struct grpc_pollset_worker *next;
+  struct grpc_pollset_worker *prev;
+};
+
+struct grpc_pollset {
+  gpr_mu mu;
+  grpc_pollset_worker root_worker;
+  int shutting_down;
+  int called_shutdown;
+  int kicked_without_pollers;
+  grpc_closure *shutdown_done;
+
+  int epoll_fd;
+
+   /* Mutex protecting the 'polling_island' field */
+  gpr_mu pi_mu;
+
+  /* The polling island to which this fd belongs to. An fd belongs to exactly
+     one polling island */
+  struct polling_island *polling_island;
+
+  /* Local cache of eventfds for workers */
+  grpc_cached_wakeup_fd *local_wakeup_cache;
+};
+
+/* Add an fd to a pollset */
+static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                           struct grpc_fd *fd);
+
+static void pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
+                               grpc_pollset_set *pollset_set, grpc_fd *fd);
+
+/* Convert a timespec to milliseconds:
+   - very small or negative poll times are clamped to zero to do a
+     non-blocking poll (which becomes spin polling)
+   - other small values are rounded up to one millisecond
+   - longer than a millisecond polls are rounded up to the next nearest
+     millisecond to avoid spinning
+   - infinite timeouts are converted to -1 */
+static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
+                                           gpr_timespec now);
+
+/* Allow kick to wakeup the currently polling worker */
+#define GRPC_POLLSET_CAN_KICK_SELF 1
+/* Force the wakee to repoll when awoken */
+#define GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP 2
+/* As per pollset_kick, with an extended set of flags (defined above)
+   -- mostly for fd_posix's use. */
+static void pollset_kick_ext(grpc_pollset *p,
+                             grpc_pollset_worker *specific_worker,
+                             uint32_t flags);
+
+/* turn a pollset into a multipoller: platform specific */
+typedef void (*platform_become_multipoller_type)(grpc_exec_ctx *exec_ctx,
+                                                 grpc_pollset *pollset,
+                                                 struct grpc_fd **fds,
+                                                 size_t fd_count);
+
+/* Return 1 if the pollset has active threads in pollset_work (pollset must
+ * be locked) */
+static int pollset_has_workers(grpc_pollset *pollset);
+
+static void remove_fd_from_all_epoll_sets(int fd);
+
+/*******************************************************************************
+ * pollset_set definitions
+ */
+
+struct grpc_pollset_set {
+  gpr_mu mu;
+
+  size_t pollset_count;
+  size_t pollset_capacity;
+  grpc_pollset **pollsets;
+
+  size_t pollset_set_count;
+  size_t pollset_set_capacity;
+  struct grpc_pollset_set **pollset_sets;
+
+  size_t fd_count;
+  size_t fd_capacity;
+  grpc_fd **fds;
+};
+
+/*******************************************************************************
+ * fd_posix.c
+ */
+
+/* We need to keep a freelist not because of any concerns of malloc performance
+ * but instead so that implementations with multiple threads in (for example)
+ * epoll_wait deal with the race between pollset removal and incoming poll
+ * notifications.
+ *
+ * The problem is that the poller ultimately holds a reference to this
+ * object, so it is very difficult to know when is safe to free it, at least
+ * without some expensive synchronization.
+ *
+ * If we keep the object freelisted, in the worst case losing this race just
+ * becomes a spurious read notification on a reused fd.
+ */
+/* TODO(klempner): We could use some form of polling generation count to know
+ * when these are safe to free. */
+/* TODO(klempner): Consider disabling freelisting if we don't have multiple
+ * threads in poll on the same fd */
+/* TODO(klempner): Batch these allocations to reduce fragmentation */
+static grpc_fd *fd_freelist = NULL;
+static gpr_mu fd_freelist_mu;
+
+static void freelist_fd(grpc_fd *fd) {
+  gpr_mu_lock(&fd_freelist_mu);
+  fd->freelist_next = fd_freelist;
+  fd_freelist = fd;
+  grpc_iomgr_unregister_object(&fd->iomgr_object);
+  gpr_mu_unlock(&fd_freelist_mu);
+}
+
+static grpc_fd *alloc_fd(int fd) {
+  grpc_fd *r = NULL;
+
+  gpr_mu_lock(&fd_freelist_mu);
+  if (fd_freelist != NULL) {
+    r = fd_freelist;
+    fd_freelist = fd_freelist->freelist_next;
+  }
+  gpr_mu_unlock(&fd_freelist_mu);
+
+  if (r == NULL) {
+    r = gpr_malloc(sizeof(grpc_fd));
+    gpr_mu_init(&r->mu);
+    gpr_mu_init(&r->pi_mu);
+  }
+
+  /* TODO: sreek - check with ctiller on why we need to acquire a lock here */
+  gpr_mu_lock(&r->mu);
+  gpr_atm_rel_store(&r->refst, 1);
+  r->shutdown = 0;
+  r->read_closure = CLOSURE_NOT_READY;
+  r->write_closure = CLOSURE_NOT_READY;
+  r->fd = fd;
+  r->polling_island = NULL;
+  r->freelist_next = NULL;
+  r->on_done_closure = NULL;
+  r->closed = 0;
+  r->released = 0;
+  gpr_mu_unlock(&r->mu);
+  return r;
+}
+
+static void destroy(grpc_fd *fd) {
+  gpr_mu_destroy(&fd->mu);
+  gpr_free(fd);
+}
+
+#ifdef GRPC_FD_REF_COUNT_DEBUG
+#define REF_BY(fd, n, reason) ref_by(fd, n, reason, __FILE__, __LINE__)
+#define UNREF_BY(fd, n, reason) unref_by(fd, n, reason, __FILE__, __LINE__)
+static void ref_by(grpc_fd *fd, int n, const char *reason, const char *file,
+                   int line) {
+  gpr_log(GPR_DEBUG, "FD %d %p   ref %d %d -> %d [%s; %s:%d]", fd->fd, fd, n,
+          gpr_atm_no_barrier_load(&fd->refst),
+          gpr_atm_no_barrier_load(&fd->refst) + n, reason, file, line);
+#else
+#define REF_BY(fd, n, reason) ref_by(fd, n)
+#define UNREF_BY(fd, n, reason) unref_by(fd, n)
+static void ref_by(grpc_fd *fd, int n) {
+#endif
+  GPR_ASSERT(gpr_atm_no_barrier_fetch_add(&fd->refst, n) > 0);
+}
+
+#ifdef GRPC_FD_REF_COUNT_DEBUG
+static void unref_by(grpc_fd *fd, int n, const char *reason, const char *file,
+                     int line) {
+  gpr_atm old;
+  gpr_log(GPR_DEBUG, "FD %d %p unref %d %d -> %d [%s; %s:%d]", fd->fd, fd, n,
+          gpr_atm_no_barrier_load(&fd->refst),
+          gpr_atm_no_barrier_load(&fd->refst) - n, reason, file, line);
+#else
+static void unref_by(grpc_fd *fd, int n) {
+  gpr_atm old;
+#endif
+  old = gpr_atm_full_fetch_add(&fd->refst, -n);
+  if (old == n) {
+    freelist_fd(fd);
+  } else {
+    GPR_ASSERT(old > n);
+  }
+}
+
+static void fd_global_init(void) { gpr_mu_init(&fd_freelist_mu); }
+
+static void fd_global_shutdown(void) {
+  gpr_mu_lock(&fd_freelist_mu);
+  gpr_mu_unlock(&fd_freelist_mu);
+  while (fd_freelist != NULL) {
+    grpc_fd *fd = fd_freelist;
+    fd_freelist = fd_freelist->freelist_next;
+    destroy(fd);
+  }
+  gpr_mu_destroy(&fd_freelist_mu);
+}
+
+static grpc_fd *fd_create(int fd, const char *name) {
+  grpc_fd *r = alloc_fd(fd);
+  char *name2;
+  gpr_asprintf(&name2, "%s fd=%d", name, fd);
+  grpc_iomgr_register_object(&r->iomgr_object, name2);
+  gpr_free(name2);
+#ifdef GRPC_FD_REF_COUNT_DEBUG
+  gpr_log(GPR_DEBUG, "FD %d %p create %s", fd, r, name);
+#endif
+  return r;
+}
+
+static bool fd_is_orphaned(grpc_fd *fd) {
+  return (gpr_atm_acq_load(&fd->refst) & 1) == 0;
+}
+
+static void close_fd_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
+  fd->closed = 1;
+  if (!fd->released) {
+    close(fd->fd);
+  } else {
+    remove_fd_from_all_epoll_sets(fd->fd);
+  }
+  grpc_exec_ctx_enqueue(exec_ctx, fd->on_done_closure, true, NULL);
+}
+
+static int fd_wrapped_fd(grpc_fd *fd) {
+  if (fd->released || fd->closed) {
+    return -1;
+  } else {
+    return fd->fd;
+  }
+}
+
+/* TODO: sreek - do something here with the pollset island link */
+static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                      grpc_closure *on_done, int *release_fd,
+                      const char *reason) {
+  fd->on_done_closure = on_done;
+  fd->released = release_fd != NULL;
+  if (!fd->released) {
+    shutdown(fd->fd, SHUT_RDWR);
+  } else {
+    *release_fd = fd->fd;
+  }
+  gpr_mu_lock(&fd->mu);
+  REF_BY(fd, 1, reason); /* remove active status, but keep referenced */
+  close_fd_locked(exec_ctx, fd);
+  gpr_mu_unlock(&fd->mu);
+  UNREF_BY(fd, 2, reason); /* drop the reference */
+}
+
+/* increment refcount by two to avoid changing the orphan bit */
+#ifdef GRPC_FD_REF_COUNT_DEBUG
+static void fd_ref(grpc_fd *fd, const char *reason, const char *file,
+                   int line) {
+  ref_by(fd, 2, reason, file, line);
+}
+
+static void fd_unref(grpc_fd *fd, const char *reason, const char *file,
+                     int line) {
+  unref_by(fd, 2, reason, file, line);
+}
+#else
+static void fd_ref(grpc_fd *fd) { ref_by(fd, 2); }
+
+static void fd_unref(grpc_fd *fd) { unref_by(fd, 2); }
+#endif
+
+static void notify_on_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                             grpc_closure **st, grpc_closure *closure) {
+  if (*st == CLOSURE_NOT_READY) {
+    /* not ready ==> switch to a waiting state by setting the closure */
+    *st = closure;
+  } else if (*st == CLOSURE_READY) {
+    /* already ready ==> queue the closure to run immediately */
+    *st = CLOSURE_NOT_READY;
+    grpc_exec_ctx_enqueue(exec_ctx, closure, !fd->shutdown, NULL);
+  } else {
+    /* upcallptr was set to a different closure.  This is an error! */
+    gpr_log(GPR_ERROR,
+            "User called a notify_on function with a previous callback still "
+            "pending");
+    abort();
+  }
+}
+
+/* returns 1 if state becomes not ready */
+static int set_ready_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                            grpc_closure **st) {
+  if (*st == CLOSURE_READY) {
+    /* duplicate ready ==> ignore */
+    return 0;
+  } else if (*st == CLOSURE_NOT_READY) {
+    /* not ready, and not waiting ==> flag ready */
+    *st = CLOSURE_READY;
+    return 0;
+  } else {
+    /* waiting ==> queue closure */
+    grpc_exec_ctx_enqueue(exec_ctx, *st, !fd->shutdown, NULL);
+    *st = CLOSURE_NOT_READY;
+    return 1;
+  }
+}
+
+/* Do something here with the pollset island link (?) */
+static void fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
+  gpr_mu_lock(&fd->mu);
+  GPR_ASSERT(!fd->shutdown);
+  fd->shutdown = 1;
+  set_ready_locked(exec_ctx, fd, &fd->read_closure);
+  set_ready_locked(exec_ctx, fd, &fd->write_closure);
+  gpr_mu_unlock(&fd->mu);
+}
+
+static void fd_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                              grpc_closure *closure) {
+  gpr_mu_lock(&fd->mu);
+  notify_on_locked(exec_ctx, fd, &fd->read_closure, closure);
+  gpr_mu_unlock(&fd->mu);
+}
+
+static void fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                               grpc_closure *closure) {
+  gpr_mu_lock(&fd->mu);
+  notify_on_locked(exec_ctx, fd, &fd->write_closure, closure);
+  gpr_mu_unlock(&fd->mu);
+}
+
+/*******************************************************************************
+ * pollset_posix.c
+ */
+
+GPR_TLS_DECL(g_current_thread_poller);
+GPR_TLS_DECL(g_current_thread_worker);
+
+/** The alarm system needs to be able to wakeup 'some poller' sometimes
+ *  (specifically when a new alarm needs to be triggered earlier than the next
+ *  alarm 'epoch').
+ *  This wakeup_fd gives us something to alert on when such a case occurs. */
+grpc_wakeup_fd grpc_global_wakeup_fd;
+
+static void remove_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
+  worker->prev->next = worker->next;
+  worker->next->prev = worker->prev;
+}
+
+static int pollset_has_workers(grpc_pollset *p) {
+  return p->root_worker.next != &p->root_worker;
+}
+
+static grpc_pollset_worker *pop_front_worker(grpc_pollset *p) {
+  if (pollset_has_workers(p)) {
+    grpc_pollset_worker *w = p->root_worker.next;
+    remove_worker(p, w);
+    return w;
+  } else {
+    return NULL;
+  }
+}
+
+static void push_back_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
+  worker->next = &p->root_worker;
+  worker->prev = worker->next->prev;
+  worker->prev->next = worker->next->prev = worker;
+}
+
+static void push_front_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
+  worker->prev = &p->root_worker;
+  worker->next = worker->prev->next;
+  worker->prev->next = worker->next->prev = worker;
+}
+
+static void pollset_kick_ext(grpc_pollset *p,
+                             grpc_pollset_worker *specific_worker,
+                             uint32_t flags) {
+  GPR_TIMER_BEGIN("pollset_kick_ext", 0);
+
+  /* pollset->mu already held */
+  if (specific_worker != NULL) {
+    if (specific_worker == GRPC_POLLSET_KICK_BROADCAST) {
+      GPR_TIMER_BEGIN("pollset_kick_ext.broadcast", 0);
+      GPR_ASSERT((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) == 0);
+      for (specific_worker = p->root_worker.next;
+           specific_worker != &p->root_worker;
+           specific_worker = specific_worker->next) {
+        grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
+      }
+      p->kicked_without_pollers = 1;
+      GPR_TIMER_END("pollset_kick_ext.broadcast", 0);
+    } else if (gpr_tls_get(&g_current_thread_worker) !=
+               (intptr_t)specific_worker) {
+      GPR_TIMER_MARK("different_thread_worker", 0);
+      if ((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) != 0) {
+        specific_worker->reevaluate_polling_on_wakeup = 1;
+      }
+      specific_worker->kicked_specifically = 1;
+      grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
+      /* TODO (sreek): Refactor this into a separate file*/
+      pthread_kill(specific_worker->pt_id, SIGUSR1);
+    } else if ((flags & GRPC_POLLSET_CAN_KICK_SELF) != 0) {
+      GPR_TIMER_MARK("kick_yoself", 0);
+      if ((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) != 0) {
+        specific_worker->reevaluate_polling_on_wakeup = 1;
+      }
+      specific_worker->kicked_specifically = 1;
+      grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
+    }
+  } else if (gpr_tls_get(&g_current_thread_poller) != (intptr_t)p) {
+    GPR_ASSERT((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) == 0);
+    GPR_TIMER_MARK("kick_anonymous", 0);
+    specific_worker = pop_front_worker(p);
+    if (specific_worker != NULL) {
+      if (gpr_tls_get(&g_current_thread_worker) == (intptr_t)specific_worker) {
+        GPR_TIMER_MARK("kick_anonymous_not_self", 0);
+        push_back_worker(p, specific_worker);
+        specific_worker = pop_front_worker(p);
+        if ((flags & GRPC_POLLSET_CAN_KICK_SELF) == 0 &&
+            gpr_tls_get(&g_current_thread_worker) ==
+                (intptr_t)specific_worker) {
+          push_back_worker(p, specific_worker);
+          specific_worker = NULL;
+        }
+      }
+      if (specific_worker != NULL) {
+        GPR_TIMER_MARK("finally_kick", 0);
+        push_back_worker(p, specific_worker);
+        grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
+      }
+    } else {
+      GPR_TIMER_MARK("kicked_no_pollers", 0);
+      p->kicked_without_pollers = 1;
+    }
+  }
+
+  GPR_TIMER_END("pollset_kick_ext", 0);
+}
+
+static void pollset_kick(grpc_pollset *p,
+                         grpc_pollset_worker *specific_worker) {
+  pollset_kick_ext(p, specific_worker, 0);
+}
+
+/* global state management */
+
+static void sig_handler(int sig_num) {
+  gpr_log(GPR_INFO, "Received signal %d", sig_num);
+}
+
+static void pollset_global_init(void) {
+  gpr_tls_init(&g_current_thread_poller);
+  gpr_tls_init(&g_current_thread_worker);
+  grpc_wakeup_fd_init(&grpc_global_wakeup_fd);
+  signal(SIGUSR1, sig_handler);
+}
+
+static void pollset_global_shutdown(void) {
+  grpc_wakeup_fd_destroy(&grpc_global_wakeup_fd);
+  gpr_tls_destroy(&g_current_thread_poller);
+  gpr_tls_destroy(&g_current_thread_worker);
+}
+
+static void kick_poller(void) { grpc_wakeup_fd_wakeup(&grpc_global_wakeup_fd); }
+
+/* TODO: sreek. Try to Remove this forward declaration*/
+static void multipoll_with_epoll_pollset_create_efd(grpc_pollset *pollset);
+
+/* main interface */
+
+static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
+  gpr_mu_init(&pollset->mu);
+  *mu = &pollset->mu;
+  pollset->root_worker.next = pollset->root_worker.prev = &pollset->root_worker;
+  gpr_mu_init(&pollset->pi_mu);
+  pollset->polling_island = NULL;
+  pollset->shutting_down = 0;
+  pollset->called_shutdown = 0;
+  pollset->kicked_without_pollers = 0;
+  pollset->local_wakeup_cache = NULL;
+  pollset->kicked_without_pollers = 0;
+
+  multipoll_with_epoll_pollset_create_efd(pollset);
+}
+
+/* TODO(sreek): Maybe merge multipoll_*_destroy() with pollset_destroy()
+ * function */
+static void multipoll_with_epoll_pollset_destroy(grpc_pollset *pollset);
+
+static void pollset_destroy(grpc_pollset *pollset) {
+  GPR_ASSERT(!pollset_has_workers(pollset));
+
+  multipoll_with_epoll_pollset_destroy(pollset);
+
+  while (pollset->local_wakeup_cache) {
+    grpc_cached_wakeup_fd *next = pollset->local_wakeup_cache->next;
+    grpc_wakeup_fd_destroy(&pollset->local_wakeup_cache->fd);
+    gpr_free(pollset->local_wakeup_cache);
+    pollset->local_wakeup_cache = next;
+  }
+  gpr_mu_destroy(&pollset->pi_mu);
+  gpr_mu_destroy(&pollset->mu);
+}
+
+/* TODO(sreek) - Do something with the pollset island link (??) */
+static void pollset_reset(grpc_pollset *pollset) {
+  GPR_ASSERT(pollset->shutting_down);
+  GPR_ASSERT(!pollset_has_workers(pollset));
+  pollset->shutting_down = 0;
+  pollset->called_shutdown = 0;
+  pollset->kicked_without_pollers = 0;
+}
+
+/* TODO (sreek): Remove multipoll_with_epoll_finish_shutdown() declaration */
+static void multipoll_with_epoll_pollset_finish_shutdown(grpc_pollset *pollset);
+
+static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset) {
+  multipoll_with_epoll_pollset_finish_shutdown(pollset);
+  grpc_exec_ctx_enqueue(exec_ctx, pollset->shutdown_done, true, NULL);
+}
+
+/* TODO(sreek): Remove multipoll_with_epoll_*_maybe_work_and_unlock declaration
+ */
+static void multipoll_with_epoll_pollset_maybe_work_and_unlock(
+    grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, grpc_pollset_worker *worker,
+    gpr_timespec deadline, gpr_timespec now);
+
+static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                         grpc_pollset_worker **worker_hdl, gpr_timespec now,
+                         gpr_timespec deadline) {
+  grpc_pollset_worker worker;
+  *worker_hdl = &worker;
+
+  /* pollset->mu already held */
+  int added_worker = 0;
+  int locked = 1;
+  int queued_work = 0;
+  int keep_polling = 0;
+  GPR_TIMER_BEGIN("pollset_work", 0);
+  /* this must happen before we (potentially) drop pollset->mu */
+  worker.next = worker.prev = NULL;
+  worker.reevaluate_polling_on_wakeup = 0;
+  if (pollset->local_wakeup_cache != NULL) {
+    worker.wakeup_fd = pollset->local_wakeup_cache;
+    pollset->local_wakeup_cache = worker.wakeup_fd->next;
+  } else {
+    worker.wakeup_fd = gpr_malloc(sizeof(*worker.wakeup_fd));
+    grpc_wakeup_fd_init(&worker.wakeup_fd->fd);
+  }
+  worker.kicked_specifically = 0;
+
+  /* TODO(sreek): Abstract this thread id stuff out into a separate file */
+  worker.pt_id = pthread_self();
+  /* If we're shutting down then we don't execute any extended work */
+  if (pollset->shutting_down) {
+    GPR_TIMER_MARK("pollset_work.shutting_down", 0);
+    goto done;
+  }
+  /* Start polling, and keep doing so while we're being asked to
+     re-evaluate our pollers (this allows poll() based pollers to
+     ensure they don't miss wakeups) */
+  keep_polling = 1;
+  while (keep_polling) {
+    keep_polling = 0;
+    if (!pollset->kicked_without_pollers) {
+      if (!added_worker) {
+        push_front_worker(pollset, &worker);
+        added_worker = 1;
+        gpr_tls_set(&g_current_thread_worker, (intptr_t)&worker);
+      }
+      gpr_tls_set(&g_current_thread_poller, (intptr_t)pollset);
+      GPR_TIMER_BEGIN("maybe_work_and_unlock", 0);
+
+      multipoll_with_epoll_pollset_maybe_work_and_unlock(
+          exec_ctx, pollset, &worker, deadline, now);
+
+      GPR_TIMER_END("maybe_work_and_unlock", 0);
+      locked = 0;
+      gpr_tls_set(&g_current_thread_poller, 0);
+    } else {
+      GPR_TIMER_MARK("pollset_work.kicked_without_pollers", 0);
+      pollset->kicked_without_pollers = 0;
+    }
+  /* Finished execution - start cleaning up.
+     Note that we may arrive here from outside the enclosing while() loop.
+     In that case we won't loop though as we haven't added worker to the
+     worker list, which means nobody could ask us to re-evaluate polling). */
+  done:
+    if (!locked) {
+      queued_work |= grpc_exec_ctx_flush(exec_ctx);
+      gpr_mu_lock(&pollset->mu);
+      locked = 1;
+    }
+    /* If we're forced to re-evaluate polling (via pollset_kick with
+       GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) then we land here and force
+       a loop */
+    if (worker.reevaluate_polling_on_wakeup) {
+      worker.reevaluate_polling_on_wakeup = 0;
+      pollset->kicked_without_pollers = 0;
+      if (queued_work || worker.kicked_specifically) {
+        /* If there's queued work on the list, then set the deadline to be
+           immediate so we get back out of the polling loop quickly */
+        deadline = gpr_inf_past(GPR_CLOCK_MONOTONIC);
+      }
+      keep_polling = 1;
+    }
+  }
+  if (added_worker) {
+    remove_worker(pollset, &worker);
+    gpr_tls_set(&g_current_thread_worker, 0);
+  }
+  /* release wakeup fd to the local pool */
+  worker.wakeup_fd->next = pollset->local_wakeup_cache;
+  pollset->local_wakeup_cache = worker.wakeup_fd;
+  /* check shutdown conditions */
+  if (pollset->shutting_down) {
+    if (pollset_has_workers(pollset)) {
+      pollset_kick(pollset, NULL);
+    } else if (!pollset->called_shutdown) {
+      pollset->called_shutdown = 1;
+      gpr_mu_unlock(&pollset->mu);
+      finish_shutdown(exec_ctx, pollset);
+      grpc_exec_ctx_flush(exec_ctx);
+      /* Continuing to access pollset here is safe -- it is the caller's
+       * responsibility to not destroy when it has outstanding calls to
+       * pollset_work.
+       * TODO(dklempner): Can we refactor the shutdown logic to avoid this? */
+      gpr_mu_lock(&pollset->mu);
+    }
+  }
+  *worker_hdl = NULL;
+  GPR_TIMER_END("pollset_work", 0);
+}
+
+/* TODO: (sreek) Do something with the pollset island link */
+static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                             grpc_closure *closure) {
+  GPR_ASSERT(!pollset->shutting_down);
+  pollset->shutting_down = 1;
+  pollset->shutdown_done = closure;
+  pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
+
+  if (!pollset->called_shutdown && !pollset_has_workers(pollset)) {
+    pollset->called_shutdown = 1;
+    finish_shutdown(exec_ctx, pollset);
+  }
+}
+
+static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
+                                           gpr_timespec now) {
+  gpr_timespec timeout;
+  static const int64_t max_spin_polling_us = 10;
+  if (gpr_time_cmp(deadline, gpr_inf_future(deadline.clock_type)) == 0) {
+    return -1;
+  }
+  if (gpr_time_cmp(deadline, gpr_time_add(now, gpr_time_from_micros(
+                                                   max_spin_polling_us,
+                                                   GPR_TIMESPAN))) <= 0) {
+    return 0;
+  }
+  timeout = gpr_time_sub(deadline, now);
+  return gpr_time_to_millis(gpr_time_add(
+      timeout, gpr_time_from_nanos(GPR_NS_PER_MS - 1, GPR_TIMESPAN)));
+}
+
+/*******************************************************************************
+ * pollset_multipoller_with_epoll_posix.c
+ */
+
+static void set_ready(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure **st) {
+  /* only one set_ready can be active at once (but there may be a racing
+     notify_on) */
+  gpr_mu_lock(&fd->mu);
+  set_ready_locked(exec_ctx, fd, st);
+  gpr_mu_unlock(&fd->mu);
+}
+
+static void fd_become_readable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
+  set_ready(exec_ctx, fd, &fd->read_closure);
+}
+
+static void fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
+  set_ready(exec_ctx, fd, &fd->write_closure);
+}
+
+/* TODO (sreek): Maybe this global list is not required. Double check*/
+struct epoll_fd_list {
+  int *epoll_fds;
+  size_t count;
+  size_t capacity;
+};
+
+static struct epoll_fd_list epoll_fd_global_list;
+static gpr_once init_epoll_fd_list_mu = GPR_ONCE_INIT;
+static gpr_mu epoll_fd_list_mu;
+
+static void init_mu(void) { gpr_mu_init(&epoll_fd_list_mu); }
+
+static void add_epoll_fd_to_global_list(int epoll_fd) {
+  gpr_once_init(&init_epoll_fd_list_mu, init_mu);
+
+  gpr_mu_lock(&epoll_fd_list_mu);
+  if (epoll_fd_global_list.count == epoll_fd_global_list.capacity) {
+    epoll_fd_global_list.capacity =
+        GPR_MAX((size_t)8, epoll_fd_global_list.capacity * 2);
+    epoll_fd_global_list.epoll_fds =
+        gpr_realloc(epoll_fd_global_list.epoll_fds,
+                    epoll_fd_global_list.capacity * sizeof(int));
+  }
+  epoll_fd_global_list.epoll_fds[epoll_fd_global_list.count++] = epoll_fd;
+  gpr_mu_unlock(&epoll_fd_list_mu);
+}
+
+static void remove_epoll_fd_from_global_list(int epoll_fd) {
+  gpr_mu_lock(&epoll_fd_list_mu);
+  GPR_ASSERT(epoll_fd_global_list.count > 0);
+  for (size_t i = 0; i < epoll_fd_global_list.count; i++) {
+    if (epoll_fd == epoll_fd_global_list.epoll_fds[i]) {
+      epoll_fd_global_list.epoll_fds[i] =
+          epoll_fd_global_list.epoll_fds[--(epoll_fd_global_list.count)];
+      break;
+    }
+  }
+  gpr_mu_unlock(&epoll_fd_list_mu);
+}
+
+static void remove_fd_from_all_epoll_sets(int fd) {
+  int err;
+  gpr_once_init(&init_epoll_fd_list_mu, init_mu);
+  gpr_mu_lock(&epoll_fd_list_mu);
+  if (epoll_fd_global_list.count == 0) {
+    gpr_mu_unlock(&epoll_fd_list_mu);
+    return;
+  }
+  for (size_t i = 0; i < epoll_fd_global_list.count; i++) {
+    err = epoll_ctl(epoll_fd_global_list.epoll_fds[i], EPOLL_CTL_DEL, fd, NULL);
+    if (err < 0 && errno != ENOENT) {
+      gpr_log(GPR_ERROR, "epoll_ctl del for %d failed: %s", fd,
+              strerror(errno));
+    }
+  }
+  gpr_mu_unlock(&epoll_fd_list_mu);
+}
+
+/* TODO: sreek - This function multipoll_with_epoll_pollset_add_fd() and
+ * finally_add_fd() in ev_poll_and_epoll_posix.c */
+static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                           grpc_fd *fd) {
+
+  /* TODO sreek - Check if we need to get a pollset->mu lock here */
+
+  struct epoll_event ev;
+  int err;
+
+  /* Hold a ref to the fd to keep it from being closed during the add. This may
+     result in a spurious wakeup being assigned to this pollset whilst adding,
+     but that should be benign. */
+  /* TODO: (sreek): Understand how a spurious wake up migh be assinged to this
+   * pollset..and how holding a reference will prevent the fd from being closed
+   * (and perhaps more importantly, see how can an fd be closed while being
+   * added to the epollset */
+  GRPC_FD_REF(fd, "add fd");
+
+  gpr_mu_lock(&fd->mu);
+  if (fd->shutdown) {
+    gpr_mu_unlock(&fd->mu);
+    GRPC_FD_UNREF(fd, "add fd");
+    return;
+  }
+  gpr_mu_unlock(&fd->mu);
+
+  ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET);
+  ev.data.ptr = fd;
+  err = epoll_ctl(pollset->epoll_fd, EPOLL_CTL_ADD, fd->fd, &ev);
+  if (err < 0) {
+    /* FDs may be added to a pollset multiple times, so EEXIST is normal. */
+    if (errno != EEXIST) {
+      gpr_log(GPR_ERROR, "epoll_ctl add for %d failed: %s", fd->fd,
+              strerror(errno));
+    }
+  }
+
+  /* The fd might have been orphaned while we were adding it to the epoll set.
+     Close the fd in such a case (which will also take care of removing it from
+     the epoll set */
+  gpr_mu_lock(&fd->mu);
+  if (fd_is_orphaned(fd) && !fd->closed) {
+    close_fd_locked(exec_ctx, fd);
+  }
+  gpr_mu_unlock(&fd->mu);
+
+  GRPC_FD_UNREF(fd, "add fd");
+}
+
+/* Creates an epoll fd and initializes the pollset */
+/* TODO: This has to be called ONLY from pollset_init function. and hence it
+ * does not acquire any lock */
+static void multipoll_with_epoll_pollset_create_efd(grpc_pollset *pollset) {
+  struct epoll_event ev;
+  int err;
+
+  pollset->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
+  if (pollset->epoll_fd < 0) {
+    gpr_log(GPR_ERROR, "epoll_create1 failed: %s", strerror(errno));
+    abort();
+  }
+  add_epoll_fd_to_global_list(pollset->epoll_fd);
+
+  ev.events = (uint32_t)(EPOLLIN | EPOLLET);
+  ev.data.ptr = NULL;
+
+  err = epoll_ctl(pollset->epoll_fd, EPOLL_CTL_ADD,
+                  GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd), &ev);
+  if (err < 0) {
+    gpr_log(GPR_ERROR, "epoll_ctl add for %d failed: %s",
+            GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd),
+            strerror(errno));
+  }
+}
+
+/* TODO(klempner): We probably want to turn this down a bit */
+#define GRPC_EPOLL_MAX_EVENTS 1000
+
+static void multipoll_with_epoll_pollset_maybe_work_and_unlock(
+    grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, grpc_pollset_worker *worker,
+    gpr_timespec deadline, gpr_timespec now) {
+  struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS];
+  int epoll_fd = pollset->epoll_fd;
+  int ep_rv;
+  int poll_rv;
+  int timeout_ms;
+  struct pollfd pfds[2];
+
+  /* If you want to ignore epoll's ability to sanely handle parallel pollers,
+   * for a more apples-to-apples performance comparison with poll, add a
+   * if (pollset->counter != 0) { return 0; }
+   * here.
+   */
+
+  gpr_mu_unlock(&pollset->mu);
+
+  timeout_ms = poll_deadline_to_millis_timeout(deadline, now);
+
+  pfds[0].fd = GRPC_WAKEUP_FD_GET_READ_FD(&worker->wakeup_fd->fd);
+  pfds[0].events = POLLIN;
+  pfds[0].revents = 0;
+  pfds[1].fd = epoll_fd;
+  pfds[1].events = POLLIN;
+  pfds[1].revents = 0;
+
+  /* TODO(vpai): Consider first doing a 0 timeout poll here to avoid
+     even going into the blocking annotation if possible */
+  GPR_TIMER_BEGIN("poll", 0);
+  GRPC_SCHEDULING_START_BLOCKING_REGION;
+  poll_rv = grpc_poll_function(pfds, 2, timeout_ms);
+  GRPC_SCHEDULING_END_BLOCKING_REGION;
+  GPR_TIMER_END("poll", 0);
+
+  if (poll_rv < 0) {
+    if (errno != EINTR) {
+      gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
+    }
+  } else if (poll_rv == 0) {
+    /* do nothing */
+  } else {
+    if (pfds[0].revents) {
+      grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd->fd);
+    }
+    if (pfds[1].revents) {
+      do {
+        /* The following epoll_wait never blocks; it has a timeout of 0 */
+        ep_rv = epoll_wait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, 0);
+        if (ep_rv < 0) {
+          if (errno != EINTR) {
+            gpr_log(GPR_ERROR, "epoll_wait() failed: %s", strerror(errno));
+          }
+        } else {
+          int i;
+          for (i = 0; i < ep_rv; ++i) {
+            grpc_fd *fd = ep_ev[i].data.ptr;
+            /* TODO(klempner): We might want to consider making err and pri
+             * separate events */
+            int cancel = ep_ev[i].events & (EPOLLERR | EPOLLHUP);
+            int read_ev = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
+            int write_ev = ep_ev[i].events & EPOLLOUT;
+            if (fd == NULL) {
+              grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
+            } else {
+              if (read_ev || cancel) {
+                fd_become_readable(exec_ctx, fd);
+              }
+              if (write_ev || cancel) {
+                fd_become_writable(exec_ctx, fd);
+              }
+            }
+          }
+        }
+      } while (ep_rv == GRPC_EPOLL_MAX_EVENTS);
+    }
+  }
+}
+
+static void multipoll_with_epoll_pollset_finish_shutdown(
+    grpc_pollset *pollset) {}
+
+static void multipoll_with_epoll_pollset_destroy(grpc_pollset *pollset) {
+  close(pollset->epoll_fd);
+  remove_epoll_fd_from_global_list(pollset->epoll_fd);
+}
+
+/*******************************************************************************
+ * pollset_set_posix.c
+ */
+
+static grpc_pollset_set *pollset_set_create(void) {
+  grpc_pollset_set *pollset_set = gpr_malloc(sizeof(*pollset_set));
+  memset(pollset_set, 0, sizeof(*pollset_set));
+  gpr_mu_init(&pollset_set->mu);
+  return pollset_set;
+}
+
+static void pollset_set_destroy(grpc_pollset_set *pollset_set) {
+  size_t i;
+  gpr_mu_destroy(&pollset_set->mu);
+  for (i = 0; i < pollset_set->fd_count; i++) {
+    GRPC_FD_UNREF(pollset_set->fds[i], "pollset_set");
+  }
+  gpr_free(pollset_set->pollsets);
+  gpr_free(pollset_set->pollset_sets);
+  gpr_free(pollset_set->fds);
+  gpr_free(pollset_set);
+}
+
+static void pollset_set_add_pollset(grpc_exec_ctx *exec_ctx,
+                                    grpc_pollset_set *pollset_set,
+                                    grpc_pollset *pollset) {
+  size_t i, j;
+  gpr_mu_lock(&pollset_set->mu);
+  if (pollset_set->pollset_count == pollset_set->pollset_capacity) {
+    pollset_set->pollset_capacity =
+        GPR_MAX(8, 2 * pollset_set->pollset_capacity);
+    pollset_set->pollsets =
+        gpr_realloc(pollset_set->pollsets, pollset_set->pollset_capacity *
+                                               sizeof(*pollset_set->pollsets));
+  }
+  pollset_set->pollsets[pollset_set->pollset_count++] = pollset;
+  for (i = 0, j = 0; i < pollset_set->fd_count; i++) {
+    if (fd_is_orphaned(pollset_set->fds[i])) {
+      GRPC_FD_UNREF(pollset_set->fds[i], "pollset_set");
+    } else {
+      pollset_add_fd(exec_ctx, pollset, pollset_set->fds[i]);
+      pollset_set->fds[j++] = pollset_set->fds[i];
+    }
+  }
+  pollset_set->fd_count = j;
+  gpr_mu_unlock(&pollset_set->mu);
+}
+
+static void pollset_set_del_pollset(grpc_exec_ctx *exec_ctx,
+                                    grpc_pollset_set *pollset_set,
+                                    grpc_pollset *pollset) {
+  size_t i;
+  gpr_mu_lock(&pollset_set->mu);
+  for (i = 0; i < pollset_set->pollset_count; i++) {
+    if (pollset_set->pollsets[i] == pollset) {
+      pollset_set->pollset_count--;
+      GPR_SWAP(grpc_pollset *, pollset_set->pollsets[i],
+               pollset_set->pollsets[pollset_set->pollset_count]);
+      break;
+    }
+  }
+  gpr_mu_unlock(&pollset_set->mu);
+}
+
+static void pollset_set_add_pollset_set(grpc_exec_ctx *exec_ctx,
+                                        grpc_pollset_set *bag,
+                                        grpc_pollset_set *item) {
+  size_t i, j;
+  gpr_mu_lock(&bag->mu);
+  if (bag->pollset_set_count == bag->pollset_set_capacity) {
+    bag->pollset_set_capacity = GPR_MAX(8, 2 * bag->pollset_set_capacity);
+    bag->pollset_sets =
+        gpr_realloc(bag->pollset_sets,
+                    bag->pollset_set_capacity * sizeof(*bag->pollset_sets));
+  }
+  bag->pollset_sets[bag->pollset_set_count++] = item;
+  for (i = 0, j = 0; i < bag->fd_count; i++) {
+    if (fd_is_orphaned(bag->fds[i])) {
+      GRPC_FD_UNREF(bag->fds[i], "pollset_set");
+    } else {
+      pollset_set_add_fd(exec_ctx, item, bag->fds[i]);
+      bag->fds[j++] = bag->fds[i];
+    }
+  }
+  bag->fd_count = j;
+  gpr_mu_unlock(&bag->mu);
+}
+
+static void pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx,
+                                        grpc_pollset_set *bag,
+                                        grpc_pollset_set *item) {
+  size_t i;
+  gpr_mu_lock(&bag->mu);
+  for (i = 0; i < bag->pollset_set_count; i++) {
+    if (bag->pollset_sets[i] == item) {
+      bag->pollset_set_count--;
+      GPR_SWAP(grpc_pollset_set *, bag->pollset_sets[i],
+               bag->pollset_sets[bag->pollset_set_count]);
+      break;
+    }
+  }
+  gpr_mu_unlock(&bag->mu);
+}
+
+static void pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
+                               grpc_pollset_set *pollset_set, grpc_fd *fd) {
+  size_t i;
+  gpr_mu_lock(&pollset_set->mu);
+  if (pollset_set->fd_count == pollset_set->fd_capacity) {
+    pollset_set->fd_capacity = GPR_MAX(8, 2 * pollset_set->fd_capacity);
+    pollset_set->fds = gpr_realloc(
+        pollset_set->fds, pollset_set->fd_capacity * sizeof(*pollset_set->fds));
+  }
+  GRPC_FD_REF(fd, "pollset_set");
+  pollset_set->fds[pollset_set->fd_count++] = fd;
+  for (i = 0; i < pollset_set->pollset_count; i++) {
+    pollset_add_fd(exec_ctx, pollset_set->pollsets[i], fd);
+  }
+  for (i = 0; i < pollset_set->pollset_set_count; i++) {
+    pollset_set_add_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
+  }
+  gpr_mu_unlock(&pollset_set->mu);
+}
+
+static void pollset_set_del_fd(grpc_exec_ctx *exec_ctx,
+                               grpc_pollset_set *pollset_set, grpc_fd *fd) {
+  size_t i;
+  gpr_mu_lock(&pollset_set->mu);
+  for (i = 0; i < pollset_set->fd_count; i++) {
+    if (pollset_set->fds[i] == fd) {
+      pollset_set->fd_count--;
+      GPR_SWAP(grpc_fd *, pollset_set->fds[i],
+               pollset_set->fds[pollset_set->fd_count]);
+      GRPC_FD_UNREF(fd, "pollset_set");
+      break;
+    }
+  }
+  for (i = 0; i < pollset_set->pollset_set_count; i++) {
+    pollset_set_del_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
+  }
+  gpr_mu_unlock(&pollset_set->mu);
+}
+
+/*******************************************************************************
+ * event engine binding
+ */
+
+static void shutdown_engine(void) {
+  fd_global_shutdown();
+  pollset_global_shutdown();
+}
+
+static const grpc_event_engine_vtable vtable = {
+    .pollset_size = sizeof(grpc_pollset),
+
+    .fd_create = fd_create,
+    .fd_wrapped_fd = fd_wrapped_fd,
+    .fd_orphan = fd_orphan,
+    .fd_shutdown = fd_shutdown,
+    .fd_notify_on_read = fd_notify_on_read,
+    .fd_notify_on_write = fd_notify_on_write,
+
+    .pollset_init = pollset_init,
+    .pollset_shutdown = pollset_shutdown,
+    .pollset_reset = pollset_reset,
+    .pollset_destroy = pollset_destroy,
+    .pollset_work = pollset_work,
+    .pollset_kick = pollset_kick,
+    .pollset_add_fd = pollset_add_fd,
+
+    .pollset_set_create = pollset_set_create,
+    .pollset_set_destroy = pollset_set_destroy,
+    .pollset_set_add_pollset = pollset_set_add_pollset,
+    .pollset_set_del_pollset = pollset_set_del_pollset,
+    .pollset_set_add_pollset_set = pollset_set_add_pollset_set,
+    .pollset_set_del_pollset_set = pollset_set_del_pollset_set,
+    .pollset_set_add_fd = pollset_set_add_fd,
+    .pollset_set_del_fd = pollset_set_del_fd,
+
+    .kick_poller = kick_poller,
+
+    .shutdown_engine = shutdown_engine,
+};
+
+const grpc_event_engine_vtable *grpc_init_epoll_linux(void) {
+  fd_global_init();
+  pollset_global_init();
+  polling_island_global_init();
+  return &vtable;
+}
+
+#endif
diff --git a/src/core/lib/iomgr/ev_epoll_linux.h b/src/core/lib/iomgr/ev_epoll_linux.h
new file mode 100644
index 00000000000..8c819975a4c
--- /dev/null
+++ b/src/core/lib/iomgr/ev_epoll_linux.h
@@ -0,0 +1,41 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_EV_EPOLL_LINUX_H
+#define GRPC_CORE_LIB_IOMGR_EV_EPOLL_LINUX_H
+
+#include "src/core/lib/iomgr/ev_posix.h"
+
+const grpc_event_engine_vtable *grpc_init_epoll_linux(void);
+
+#endif /* GRPC_CORE_LIB_IOMGR_EV_EPOLL_LINUX_H */
diff --git a/src/core/lib/iomgr/ev_epoll_posix.c b/src/core/lib/iomgr/ev_epoll_posix.c
index 4481bab4380..5abd5b2a94c 100644
--- a/src/core/lib/iomgr/ev_epoll_posix.c
+++ b/src/core/lib/iomgr/ev_epoll_posix.c
@@ -42,6 +42,7 @@
 #include <poll.h>
 #include <signal.h>
 #include <string.h>
+#include <sys/epoll.h>
 #include <sys/socket.h>
 #include <unistd.h>
 
@@ -51,11 +52,13 @@
 #include <grpc/support/tls.h>
 #include <grpc/support/useful.h>
 
+#include "src/core/lib/iomgr/ev_posix.h"
 #include "src/core/lib/iomgr/iomgr_internal.h"
 #include "src/core/lib/iomgr/wakeup_fd_posix.h"
 #include "src/core/lib/profiling/timers.h"
 #include "src/core/lib/support/block_annotate.h"
 
+
 /*******************************************************************************
  * FD declarations
  */
@@ -133,10 +136,9 @@ struct grpc_pollset {
   int called_shutdown;
   int kicked_without_pollers;
   grpc_closure *shutdown_done;
-  union {
-    int fd;
-    void *ptr;
-  } data;
+
+  int epoll_fd;
+
   /* Local cache of eventfds for workers */
   grpc_cached_wakeup_fd *local_wakeup_cache;
 };
@@ -589,7 +591,6 @@ static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
   pollset->local_wakeup_cache = NULL;
   pollset->kicked_without_pollers = 0;
 
-  pollset->data.ptr = NULL;
   multipoll_with_epoll_pollset_create_efd(pollset);
 }
 
@@ -619,22 +620,6 @@ static void pollset_reset(grpc_pollset *pollset) {
   pollset->kicked_without_pollers = 0;
 }
 
-/* TODO (sreek): Remove multipoll_with_epoll_add_fd declaration*/
-static void multipoll_with_epoll_pollset_add_fd(grpc_exec_ctx *exec_ctx,
-                                                grpc_pollset *pollset,
-                                                grpc_fd *fd);
-
-static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                           grpc_fd *fd) {
-  /* TODO (sreek) - Does reading pollset->data.ptr need pollset->mu lock ?
-   * because finally_add_fd() also reads it but without the lock! */
-  gpr_mu_lock(&pollset->mu);
-  GPR_ASSERT(pollset->data.ptr != NULL);
-  gpr_mu_unlock(&pollset->mu);
-
-  multipoll_with_epoll_pollset_add_fd(exec_ctx, pollset, fd);
-}
-
 /* TODO (sreek): Remove multipoll_with_epoll_finish_shutdown() declaration */
 static void multipoll_with_epoll_pollset_finish_shutdown(grpc_pollset *pollset);
 
@@ -790,20 +775,6 @@ static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
  * pollset_multipoller_with_epoll_posix.c
  */
 
-#include <errno.h>
-#include <poll.h>
-#include <string.h>
-#include <sys/epoll.h>
-#include <unistd.h>
-
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
-#include <grpc/support/useful.h>
-
-#include "src/core/lib/iomgr/ev_posix.h"
-#include "src/core/lib/profiling/timers.h"
-#include "src/core/lib/support/block_annotate.h"
-
 static void set_ready(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure **st) {
   /* only one set_ready can be active at once (but there may be a racing
      notify_on) */
@@ -879,13 +850,13 @@ static void remove_fd_from_all_epoll_sets(int fd) {
   gpr_mu_unlock(&epoll_fd_list_mu);
 }
 
-typedef struct { int epoll_fd; } epoll_hdr;
-
-static void finally_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+/* TODO: sreek - This function multipoll_with_epoll_pollset_add_fd() and
+ * finally_add_fd() in ev_poll_and_epoll_posix.c */
+static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                            grpc_fd *fd) {
-  /*TODO: (sree) Shouldn't this read (pollset->data.ptr) be done under a
-    pollset lock - i.e pollset->mu ? */
-  epoll_hdr *h = pollset->data.ptr;
+
+  /* TODO sreek - Check if we need to get a pollset->mu lock here */
+
   struct epoll_event ev;
   int err;
 
@@ -908,7 +879,7 @@ static void finally_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 
   ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET);
   ev.data.ptr = fd;
-  err = epoll_ctl(h->epoll_fd, EPOLL_CTL_ADD, fd->fd, &ev);
+  err = epoll_ctl(pollset->epoll_fd, EPOLL_CTL_ADD, fd->fd, &ev);
   if (err < 0) {
     /* FDs may be added to a pollset multiple times, so EEXIST is normal. */
     if (errno != EEXIST) {
@@ -933,26 +904,20 @@ static void finally_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 /* TODO: This has to be called ONLY from pollset_init function. and hence it
  * does not acquire any lock */
 static void multipoll_with_epoll_pollset_create_efd(grpc_pollset *pollset) {
-  epoll_hdr *h = gpr_malloc(sizeof(epoll_hdr));
   struct epoll_event ev;
   int err;
 
-  /* TODO (sreek). remove this assert. Currently added this just to ensure that
-   * we do not overwrite h->epoll_fd without freeing the older one*/
-  GPR_ASSERT(pollset->data.ptr == NULL);
-
-  pollset->data.ptr = h;
-  h->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
-  if (h->epoll_fd < 0) {
+  pollset->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
+  if (pollset->epoll_fd < 0) {
     gpr_log(GPR_ERROR, "epoll_create1 failed: %s", strerror(errno));
     abort();
   }
-  add_epoll_fd_to_global_list(h->epoll_fd);
+  add_epoll_fd_to_global_list(pollset->epoll_fd);
 
   ev.events = (uint32_t)(EPOLLIN | EPOLLET);
   ev.data.ptr = NULL;
 
-  err = epoll_ctl(h->epoll_fd, EPOLL_CTL_ADD,
+  err = epoll_ctl(pollset->epoll_fd, EPOLL_CTL_ADD,
                   GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd), &ev);
   if (err < 0) {
     gpr_log(GPR_ERROR, "epoll_ctl add for %d failed: %s",
@@ -961,12 +926,6 @@ static void multipoll_with_epoll_pollset_create_efd(grpc_pollset *pollset) {
   }
 }
 
-static void multipoll_with_epoll_pollset_add_fd(grpc_exec_ctx *exec_ctx,
-                                                grpc_pollset *pollset,
-                                                grpc_fd *fd) {
-  finally_add_fd(exec_ctx, pollset, fd);
-}
-
 /* TODO(klempner): We probably want to turn this down a bit */
 #define GRPC_EPOLL_MAX_EVENTS 1000
 
@@ -974,9 +933,9 @@ static void multipoll_with_epoll_pollset_maybe_work_and_unlock(
     grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, grpc_pollset_worker *worker,
     gpr_timespec deadline, gpr_timespec now) {
   struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS];
+  int epoll_fd = pollset->epoll_fd;
   int ep_rv;
   int poll_rv;
-  epoll_hdr *h = pollset->data.ptr;
   int timeout_ms;
   struct pollfd pfds[2];
 
@@ -993,7 +952,7 @@ static void multipoll_with_epoll_pollset_maybe_work_and_unlock(
   pfds[0].fd = GRPC_WAKEUP_FD_GET_READ_FD(&worker->wakeup_fd->fd);
   pfds[0].events = POLLIN;
   pfds[0].revents = 0;
-  pfds[1].fd = h->epoll_fd;
+  pfds[1].fd = epoll_fd;
   pfds[1].events = POLLIN;
   pfds[1].revents = 0;
 
@@ -1018,7 +977,7 @@ static void multipoll_with_epoll_pollset_maybe_work_and_unlock(
     if (pfds[1].revents) {
       do {
         /* The following epoll_wait never blocks; it has a timeout of 0 */
-        ep_rv = epoll_wait(h->epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, 0);
+        ep_rv = epoll_wait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, 0);
         if (ep_rv < 0) {
           if (errno != EINTR) {
             gpr_log(GPR_ERROR, "epoll_wait() failed: %s", strerror(errno));
@@ -1053,10 +1012,8 @@ static void multipoll_with_epoll_pollset_finish_shutdown(
     grpc_pollset *pollset) {}
 
 static void multipoll_with_epoll_pollset_destroy(grpc_pollset *pollset) {
-  epoll_hdr *h = pollset->data.ptr;
-  close(h->epoll_fd);
-  remove_epoll_fd_from_global_list(h->epoll_fd);
-  gpr_free(h);
+  close(pollset->epoll_fd);
+  remove_epoll_fd_from_global_list(pollset->epoll_fd);
 }
 
 /*******************************************************************************
diff --git a/src/core/lib/iomgr/ev_posix.c b/src/core/lib/iomgr/ev_posix.c
index baa3b9856ad..404ef2a64b9 100644
--- a/src/core/lib/iomgr/ev_posix.c
+++ b/src/core/lib/iomgr/ev_posix.c
@@ -44,7 +44,7 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/useful.h>
 
-#include "src/core/lib/iomgr/ev_epoll_posix.h"
+#include "src/core/lib/iomgr/ev_epoll_linux.h"
 #include "src/core/lib/iomgr/ev_poll_posix.h"
 #include "src/core/lib/support/env.h"
 
@@ -163,11 +163,6 @@ void grpc_fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
   g_event_engine->fd_notify_on_write(exec_ctx, fd, closure);
 }
 
-grpc_pollset *grpc_fd_get_read_notifier_pollset(grpc_exec_ctx *exec_ctx,
-                                                grpc_fd *fd) {
-  return g_event_engine->fd_get_read_notifier_pollset(exec_ctx, fd);
-}
-
 size_t grpc_pollset_size(void) { return g_event_engine->pollset_size; }
 
 void grpc_pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index 49b4ddc457c..13bc6888d66 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -94,6 +94,7 @@ CORE_SOURCE_FILES = [
   'src/core/lib/iomgr/endpoint.c',
   'src/core/lib/iomgr/endpoint_pair_posix.c',
   'src/core/lib/iomgr/endpoint_pair_windows.c',
+  'src/core/lib/iomgr/ev_epoll_linux.c',
   'src/core/lib/iomgr/ev_epoll_posix.c',
   'src/core/lib/iomgr/ev_poll_posix.c',
   'src/core/lib/iomgr/ev_posix.c',
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index 36b25cca161..d968278f2a4 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -807,6 +807,7 @@ src/core/lib/http/parser.h \
 src/core/lib/iomgr/closure.h \
 src/core/lib/iomgr/endpoint.h \
 src/core/lib/iomgr/endpoint_pair.h \
+src/core/lib/iomgr/ev_epoll_linux.h \
 src/core/lib/iomgr/ev_epoll_posix.h \
 src/core/lib/iomgr/ev_poll_posix.h \
 src/core/lib/iomgr/ev_posix.h \
@@ -955,6 +956,7 @@ src/core/lib/iomgr/closure.c \
 src/core/lib/iomgr/endpoint.c \
 src/core/lib/iomgr/endpoint_pair_posix.c \
 src/core/lib/iomgr/endpoint_pair_windows.c \
+src/core/lib/iomgr/ev_epoll_linux.c \
 src/core/lib/iomgr/ev_epoll_posix.c \
 src/core/lib/iomgr/ev_poll_posix.c \
 src/core/lib/iomgr/ev_posix.c \
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index 43940495864..97cc55db36e 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -5530,6 +5530,7 @@
       "src/core/lib/iomgr/closure.h", 
       "src/core/lib/iomgr/endpoint.h", 
       "src/core/lib/iomgr/endpoint_pair.h", 
+      "src/core/lib/iomgr/ev_epoll_linux.h", 
       "src/core/lib/iomgr/ev_epoll_posix.h", 
       "src/core/lib/iomgr/ev_poll_posix.h", 
       "src/core/lib/iomgr/ev_posix.h", 
@@ -5630,6 +5631,8 @@
       "src/core/lib/iomgr/endpoint_pair.h", 
       "src/core/lib/iomgr/endpoint_pair_posix.c", 
       "src/core/lib/iomgr/endpoint_pair_windows.c", 
+      "src/core/lib/iomgr/ev_epoll_linux.c", 
+      "src/core/lib/iomgr/ev_epoll_linux.h", 
       "src/core/lib/iomgr/ev_epoll_posix.c", 
       "src/core/lib/iomgr/ev_epoll_posix.h", 
       "src/core/lib/iomgr/ev_poll_posix.c", 
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj b/vsprojects/vcxproj/grpc/grpc.vcxproj
index 55304af5869..a67e4d16dad 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj
@@ -316,6 +316,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\closure.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint_pair.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_linux.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_poll_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_posix.h" />
@@ -484,6 +485,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint_pair_windows.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_linux.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_poll_posix.c">
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
index 7d1c90fda7c..bf9b7dc7dcf 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
@@ -55,6 +55,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint_pair_windows.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_linux.c">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
@@ -677,6 +680,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint_pair.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_linux.h">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
index 3d0cdfc668b..afc9a2ca1b2 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
@@ -304,6 +304,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\closure.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint_pair.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_linux.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_poll_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_posix.h" />
@@ -450,6 +451,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint_pair_windows.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_linux.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_poll_posix.c">
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index d2ff4c630fd..b7507f9a963 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -58,6 +58,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint_pair_windows.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_linux.c">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
@@ -575,6 +578,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint_pair.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_linux.h">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>

From 9442bab5d303d7bd33e9406129ad897588d07111 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Fri, 20 May 2016 17:54:06 -0700
Subject: [PATCH 020/280] Write most of the methods in the new epoll
 implementation

---
 src/core/lib/iomgr/ev_epoll_linux.c | 301 ++++++++++++++++++++++------
 1 file changed, 244 insertions(+), 57 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index f257ac8a1dd..0d30bb659b6 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -150,28 +150,84 @@ typedef struct polling_island {
 static gpr_mu g_pi_freelist_mu;
 static polling_island *g_pi_freelist = NULL;
 
-/* TODO: sreek - Should we hold a lock on fd or add a ref to the fd ? */
-static void add_fd_to_polling_island_locked(polling_island *pi, grpc_fd *fd) {
+/* TODO: sreek - Should we hold a lock on fd or add a ref to the fd ?
+ * TODO: sreek - Should this add a ref to the grpc_fd ? */
+/* The caller is expected to hold pi->mu lock before calling this function */
+static void polling_island_add_fds_locked(polling_island *pi, grpc_fd **fds,
+                                          size_t fd_count) {
   int err;
+  size_t i;
   struct epoll_event ev;
 
-  ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET);
-  ev.data.ptr = fd;
-  err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_ADD, fd->fd, &ev);
+  for (i = 0; i < fd_count; i++) {
+    ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET);
+    ev.data.ptr = fds[i];
+    err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_ADD, fds[i]->fd, &ev);
+
+    if (err < 0 && errno != EEXIST) {
+      gpr_log(GPR_ERROR, "epoll_ctl add for fd: %d failed with error: %s",
+              fds[i]->fd, strerror(errno));
+      /* TODO: sreek - Not sure if it is a good idea to continue here. We need a
+       * better way to bubble up this error instead of doing an abort() */
+      continue;
+    }
 
-  if (err < 0 && errno != EEXIST) {
-    gpr_log(GPR_ERROR, "epoll_ctl add for fd: %d failed with error: %s", fd->fd,
-            strerror(errno));
-    return;
+    if (pi->fd_cnt == pi->fd_capacity) {
+      pi->fd_capacity = GPR_MAX(pi->fd_capacity + 8, pi->fd_cnt * 3 / 2);
+      pi->fds = gpr_realloc(pi->fds, sizeof(grpc_fd *) * pi->fd_capacity);
+    }
+
+    pi->fds[pi->fd_cnt++] = fds[i];
+  }
+}
+
+/* TODO: sreek - Should we hold a lock on fd or add a ref to the fd ?
+ * TODO: sreek - Might have to unref the fds (assuming whether we add a ref to
+ * the fd when adding it to the epollset) */
+/* The caller is expected to hold pi->mu lock before calling this function */
+static void polling_island_clear_fds_locked(polling_island *pi) {
+  int err;
+  size_t i;
+
+  for (i = 0; i < pi->fd_cnt; i++) {
+    err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_DEL, pi->fds[i]->fd, NULL);
+
+    if (err < 0 && errno != ENOENT) {
+      gpr_log(GPR_ERROR,
+              "epoll_ctl delete for fds[i]: %d failed with error: %s", i,
+              pi->fds[i]->fd, strerror(errno));
+      /* TODO: sreek - Not sure if it is a good idea to continue here. We need a
+       * better way to bubble up this error instead of doing an abort() */
+      continue;
+    }
+  }
+
+  pi->fd_cnt = 0;
+}
+
+/* TODO: sreek - Should we hold a lock on fd or add a ref to the fd ?
+ * TODO: sreek - Might have to unref the fd (assuming whether we add a ref to
+ * the fd when adding it to the epollset) */
+/* The caller is expected to hold pi->mu lock before calling this function */
+static void polling_island_remove_fd_locked(polling_island *pi, grpc_fd *fd) {
+  int err;
+  size_t i;
+  err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_DEL, fd->fd, NULL);
+  if (err < 0 && errno != ENOENT) {
+    gpr_log(GPR_ERROR, "epoll_ctl delete for fd: %d failed with error; %s",
+            fd->fd, strerror(errno));
   }
 
-  pi->fd_capacity = GPR_MAX(pi->fd_capacity + 8, pi->fd_cnt * 3 / 2);
-  pi->fds = gpr_realloc(pi->fds, sizeof(grpc_fd *) * pi->fd_capacity);
-  pi->fds[pi->fd_cnt++] = fd;
+  for (i = 0; i < pi->fd_cnt; i++) {
+    if (pi->fds[i] == fd) {
+      pi->fds[i] = pi->fds[--pi->fd_cnt];
+      break;
+    }
+  }
 }
 
-static polling_island *polling_island_create(int initial_ref_cnt,
-                                             grpc_fd *initial_fd) {
+static polling_island *polling_island_create(grpc_fd *initial_fd,
+                                             int initial_ref_cnt) {
   polling_island *pi = NULL;
   gpr_mu_lock(&g_pi_freelist_mu);
   if (g_pi_freelist != NULL) {
@@ -202,17 +258,151 @@ static polling_island *polling_island_create(int initial_ref_cnt,
   pi->next_free = NULL;
 
   if (initial_fd != NULL) {
-    /* add_fd_to_polling_island_locked() expects the caller to hold a pi->mu
+    /* polling_island_add_fds_locked() expects the caller to hold a pi->mu
      * lock. However, since this is a new polling island (and no one has a
      * reference to it yet), it is okay to not acquire pi->mu here */
-    add_fd_to_polling_island_locked(pi, initial_fd);
+    polling_island_add_fds_locked(pi, &initial_fd, 1);
   }
 
   return pi;
 }
 
+static void polling_island_delete(polling_island *pi) {
+  GPR_ASSERT(pi->ref_cnt == 0);
+  GPR_ASSERT(pi->fd_cnt == 0);
+
+  pi->merged_to = NULL;
+
+  gpr_mu_lock(&g_pi_freelist_mu);
+  pi->next_free = g_pi_freelist;
+  g_pi_freelist = pi;
+  gpr_mu_unlock(&g_pi_freelist_mu);
+}
+
+void polling_island_unref_and_unlock(polling_island *pi, int unref_by) {
+  pi->ref_cnt -= unref_by;
+  int ref_cnt = pi->ref_cnt;
+  GPR_ASSERT(ref_cnt >= 0);
+
+  gpr_mu_unlock(&pi->mu);
+
+  if (ref_cnt == 0) {
+    polling_island_delete(pi);
+  }
+}
+
+polling_island *polling_island_update_and_lock(polling_island *pi, int unref_by,
+                                               int add_ref_by) {
+  polling_island *next = NULL;
+  gpr_mu_lock(&pi->mu);
+  while (pi->merged_to != NULL) {
+    next = pi->merged_to;
+    polling_island_unref_and_unlock(pi, unref_by);
+    pi = next;
+    gpr_mu_lock(&pi->mu);
+  }
+
+  pi->ref_cnt += add_ref_by;
+  return pi;
+}
+
+void polling_island_pair_update_and_lock(polling_island **p,
+                                         polling_island **q) {
+  polling_island *pi_1 = *p;
+  polling_island *pi_2 = *q;
+  polling_island *temp = NULL;
+  bool pi_1_locked = false;
+  bool pi_2_locked = false;
+  int num_swaps = 0;
+
+  while (pi_1 != pi_2 && !(pi_1_locked && pi_2_locked)) {
+    // pi_1 is NOT equal to pi_2
+    // pi_1 MAY be locked
+
+    if (pi_1 > pi_2) {
+      if (pi_1_locked) {
+        gpr_mu_unlock(&pi_1->mu);
+        pi_1_locked = false;
+      }
+
+      GPR_SWAP(polling_island *, pi_1, pi_2);
+      num_swaps++;
+    }
+
+    // p1 < p2
+    // p1 MAY BE locked
+    // p2 is NOT locked
+
+    if (!pi_1_locked) {
+      gpr_mu_lock(&pi_1->mu);
+      pi_1_locked = true;
+
+      if (pi_1->merged_to != NULL) {
+        temp = pi_1->merged_to;
+        polling_island_unref_and_unlock(pi_1, 1);
+        pi_1 = temp;
+        pi_1_locked = false;
+
+        continue;
+      }
+    }
+
+    // p1 is LOCKED
+    // p2 is UNLOCKED
+    // p1 != p2
+
+    gpr_mu_lock(&pi_2->mu);
+    pi_2_locked = true;
+
+    if (pi_2->merged_to != NULL) {
+      temp = pi_2->merged_to;
+      polling_island_unref_and_unlock(pi_2, 1);
+      pi_2 = temp;
+      pi_2_locked = false;
+    }
+  }
+
+  // Either pi_1 == pi_2 OR we got both locks!
+  if (pi_1 == pi_2) {
+    GPR_ASSERT(pi_1_locked || (!pi_1_locked && !pi_2_locked));
+    if (!pi_1_locked) {
+      pi_1 = pi_2 = polling_island_update_and_lock(pi_1, 2, 0);
+    }
+  } else {
+    GPR_ASSERT(pi_1_locked && pi_2_locked);
+    if (num_swaps % 2 > 0) {
+      GPR_SWAP(polling_island *, pi_1, pi_2);
+    }
+  }
+
+  *p = pi_1;
+  *q = pi_2;
+}
+
+polling_island *polling_island_merge(polling_island *p, polling_island *q) {
+  polling_island *merged = NULL;
+
+  polling_island_pair_update_and_lock(&p, &q);
+
+  /* TODO: sreek: Think about this scenario some more. Is it possible ?. what
+   * does it mean, when would this happen  */
+  if (p == q) {
+    merged = p;
+  }
+
+  // Move all the fds from polling_island p to polling_island q
+  polling_island_add_fds_locked(q, p->fds, p->fd_cnt);
+  polling_island_clear_fds_locked(p);
+
+  q->ref_cnt += p->ref_cnt;
+
+  gpr_mu_unlock(&p->mu);
+  gpr_mu_unlock(&q->mu);
+
+  return merged;
+}
+
 static void polling_island_global_init() {
-  polling_island_create(0, NULL); /* TODO(sreek): Delete this line */
   gpr_mu_init(&g_pi_freelist_mu);
   g_pi_freelist = NULL;
 }
@@ -245,7 +435,7 @@ struct grpc_pollset {
 
   int epoll_fd;
 
-   /* Mutex protecting the 'polling_island' field */
+  /* Mutex protecting the 'polling_island' field */
   gpr_mu pi_mu;
 
   /* The polling island to which this fd belongs to. An fd belongs to exactly
@@ -319,7 +509,8 @@ struct grpc_pollset_set {
  * fd_posix.c
  */
 
-/* We need to keep a freelist not because of any concerns of malloc performance
+/* We need to keep a freelist not because of any concerns of malloc
+ * performance
  * but instead so that implementations with multiple threads in (for example)
  * epoll_wait deal with the race between pollset removal and incoming poll
  * notifications.
@@ -434,6 +625,7 @@ static void fd_global_shutdown(void) {
 
 static grpc_fd *fd_create(int fd, const char *name) {
   grpc_fd *r = alloc_fd(fd);
+
   char *name2;
   gpr_asprintf(&name2, "%s fd=%d", name, fd);
   grpc_iomgr_register_object(&r->iomgr_object, name2);
@@ -453,6 +645,20 @@ static void close_fd_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
   if (!fd->released) {
     close(fd->fd);
   } else {
+    /* TODO: sreek - Check for deadlocks */
+
+    gpr_mu_lock(&fd->pi_mu);
+    fd->polling_island =
+        polling_island_update_and_lock(fd->polling_island, 1, 0);
+
+    polling_island_remove_fd_locked(fd->polling_island, fd);
+    polling_island_unref_and_unlock(fd->polling_island, 1);
+
+    fd->polling_island = NULL;
+    gpr_mu_unlock(&fd->pi_mu);
+
+
+    /* TODO: sreek - This should be no longer needed */
     remove_fd_from_all_epoll_sets(fd->fd);
   }
   grpc_exec_ctx_enqueue(exec_ctx, fd->on_done_closure, true, NULL);
@@ -752,7 +958,8 @@ static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset) {
   grpc_exec_ctx_enqueue(exec_ctx, pollset->shutdown_done, true, NULL);
 }
 
-/* TODO(sreek): Remove multipoll_with_epoll_*_maybe_work_and_unlock declaration
+/* TODO(sreek): Remove multipoll_with_epoll_*_maybe_work_and_unlock
+ * declaration
  */
 static void multipoll_with_epoll_pollset_maybe_work_and_unlock(
     grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, grpc_pollset_worker *worker,
@@ -979,50 +1186,30 @@ static void remove_fd_from_all_epoll_sets(int fd) {
  * finally_add_fd() in ev_poll_and_epoll_posix.c */
 static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                            grpc_fd *fd) {
-
   /* TODO sreek - Check if we need to get a pollset->mu lock here */
+  gpr_mu_lock(&pollset->pi_mu);
+  gpr_mu_lock(&fd->pi_mu);
 
-  struct epoll_event ev;
-  int err;
-
-  /* Hold a ref to the fd to keep it from being closed during the add. This may
-     result in a spurious wakeup being assigned to this pollset whilst adding,
-     but that should be benign. */
-  /* TODO: (sreek): Understand how a spurious wake up migh be assinged to this
-   * pollset..and how holding a reference will prevent the fd from being closed
-   * (and perhaps more importantly, see how can an fd be closed while being
-   * added to the epollset */
-  GRPC_FD_REF(fd, "add fd");
+  polling_island *pi_new = NULL;
 
-  gpr_mu_lock(&fd->mu);
-  if (fd->shutdown) {
-    gpr_mu_unlock(&fd->mu);
-    GRPC_FD_UNREF(fd, "add fd");
-    return;
-  }
-  gpr_mu_unlock(&fd->mu);
-
-  ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET);
-  ev.data.ptr = fd;
-  err = epoll_ctl(pollset->epoll_fd, EPOLL_CTL_ADD, fd->fd, &ev);
-  if (err < 0) {
-    /* FDs may be added to a pollset multiple times, so EEXIST is normal. */
-    if (errno != EEXIST) {
-      gpr_log(GPR_ERROR, "epoll_ctl add for %d failed: %s", fd->fd,
-              strerror(errno));
+  if (fd->polling_island == pollset->polling_island) {
+    pi_new = fd->polling_island;
+    if (pi_new == NULL) {
+      pi_new = polling_island_create(fd, 2);
     }
-  }
+  } else if (fd->polling_island == NULL) {
+    pi_new = polling_island_update_and_lock(pollset->polling_island, 1, 1);
 
-  /* The fd might have been orphaned while we were adding it to the epoll set.
-     Close the fd in such a case (which will also take care of removing it from
-     the epoll set */
-  gpr_mu_lock(&fd->mu);
-  if (fd_is_orphaned(fd) && !fd->closed) {
-    close_fd_locked(exec_ctx, fd);
+  } else if (pollset->polling_island == NULL) {
+    pi_new = polling_island_update_and_lock(fd->polling_island, 1, 1);
+  } else {  // Non null and different
+    pi_new = polling_island_merge(fd->polling_island, pollset->polling_island);
   }
-  gpr_mu_unlock(&fd->mu);
 
-  GRPC_FD_UNREF(fd, "add fd");
+  fd->polling_island = pollset->polling_island = pi_new;
+
+  gpr_mu_unlock(&fd->pi_mu);
+  gpr_mu_unlock(&pollset->pi_mu);
 }
 
 /* Creates an epoll fd and initializes the pollset */

From d806145573f8e78a52012b4b8ab94ff46b855d58 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Fri, 20 May 2016 18:12:30 -0700
Subject: [PATCH 021/280] Removed epoll_fd_global_list

---
 src/core/lib/iomgr/ev_epoll_linux.c | 68 +----------------------------
 1 file changed, 1 insertion(+), 67 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 0d30bb659b6..7793a952016 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -483,8 +483,6 @@ typedef void (*platform_become_multipoller_type)(grpc_exec_ctx *exec_ctx,
  * be locked) */
 static int pollset_has_workers(grpc_pollset *pollset);
 
-static void remove_fd_from_all_epoll_sets(int fd);
-
 /*******************************************************************************
  * pollset_set definitions
  */
@@ -656,11 +654,8 @@ static void close_fd_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
 
     fd->polling_island = NULL;
     gpr_mu_unlock(&fd->pi_mu);
-
-
-    /* TODO: sreek - This should be no longer needed */
-    remove_fd_from_all_epoll_sets(fd->fd);
   }
+
   grpc_exec_ctx_enqueue(exec_ctx, fd->on_done_closure, true, NULL);
 }
 
@@ -1123,65 +1118,6 @@ static void fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
   set_ready(exec_ctx, fd, &fd->write_closure);
 }
 
-/* TODO (sreek): Maybe this global list is not required. Double check*/
-struct epoll_fd_list {
-  int *epoll_fds;
-  size_t count;
-  size_t capacity;
-};
-
-static struct epoll_fd_list epoll_fd_global_list;
-static gpr_once init_epoll_fd_list_mu = GPR_ONCE_INIT;
-static gpr_mu epoll_fd_list_mu;
-
-static void init_mu(void) { gpr_mu_init(&epoll_fd_list_mu); }
-
-static void add_epoll_fd_to_global_list(int epoll_fd) {
-  gpr_once_init(&init_epoll_fd_list_mu, init_mu);
-
-  gpr_mu_lock(&epoll_fd_list_mu);
-  if (epoll_fd_global_list.count == epoll_fd_global_list.capacity) {
-    epoll_fd_global_list.capacity =
-        GPR_MAX((size_t)8, epoll_fd_global_list.capacity * 2);
-    epoll_fd_global_list.epoll_fds =
-        gpr_realloc(epoll_fd_global_list.epoll_fds,
-                    epoll_fd_global_list.capacity * sizeof(int));
-  }
-  epoll_fd_global_list.epoll_fds[epoll_fd_global_list.count++] = epoll_fd;
-  gpr_mu_unlock(&epoll_fd_list_mu);
-}
-
-static void remove_epoll_fd_from_global_list(int epoll_fd) {
-  gpr_mu_lock(&epoll_fd_list_mu);
-  GPR_ASSERT(epoll_fd_global_list.count > 0);
-  for (size_t i = 0; i < epoll_fd_global_list.count; i++) {
-    if (epoll_fd == epoll_fd_global_list.epoll_fds[i]) {
-      epoll_fd_global_list.epoll_fds[i] =
-          epoll_fd_global_list.epoll_fds[--(epoll_fd_global_list.count)];
-      break;
-    }
-  }
-  gpr_mu_unlock(&epoll_fd_list_mu);
-}
-
-static void remove_fd_from_all_epoll_sets(int fd) {
-  int err;
-  gpr_once_init(&init_epoll_fd_list_mu, init_mu);
-  gpr_mu_lock(&epoll_fd_list_mu);
-  if (epoll_fd_global_list.count == 0) {
-    gpr_mu_unlock(&epoll_fd_list_mu);
-    return;
-  }
-  for (size_t i = 0; i < epoll_fd_global_list.count; i++) {
-    err = epoll_ctl(epoll_fd_global_list.epoll_fds[i], EPOLL_CTL_DEL, fd, NULL);
-    if (err < 0 && errno != ENOENT) {
-      gpr_log(GPR_ERROR, "epoll_ctl del for %d failed: %s", fd,
-              strerror(errno));
-    }
-  }
-  gpr_mu_unlock(&epoll_fd_list_mu);
-}
-
 /* TODO: sreek - This function multipoll_with_epoll_pollset_add_fd() and
  * finally_add_fd() in ev_poll_and_epoll_posix.c */
 static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
@@ -1224,7 +1160,6 @@ static void multipoll_with_epoll_pollset_create_efd(grpc_pollset *pollset) {
     gpr_log(GPR_ERROR, "epoll_create1 failed: %s", strerror(errno));
     abort();
   }
-  add_epoll_fd_to_global_list(pollset->epoll_fd);
 
   ev.events = (uint32_t)(EPOLLIN | EPOLLET);
   ev.data.ptr = NULL;
@@ -1325,7 +1260,6 @@ static void multipoll_with_epoll_pollset_finish_shutdown(
 
 static void multipoll_with_epoll_pollset_destroy(grpc_pollset *pollset) {
   close(pollset->epoll_fd);
-  remove_epoll_fd_from_global_list(pollset->epoll_fd);
 }
 
 /*******************************************************************************

From 96b2554313120949dd26e3c0968e8aea9b8a650f Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Fri, 20 May 2016 18:14:48 -0700
Subject: [PATCH 022/280] ctiller's ev_epoll_linux.c file (for reference)

---
 src/core/lib/iomgr/ctiller_ev_epoll_linux.c | 461 ++++++++++++++++++++
 1 file changed, 461 insertions(+)
 create mode 100644 src/core/lib/iomgr/ctiller_ev_epoll_linux.c

diff --git a/src/core/lib/iomgr/ctiller_ev_epoll_linux.c b/src/core/lib/iomgr/ctiller_ev_epoll_linux.c
new file mode 100644
index 00000000000..23c20a77aae
--- /dev/null
+++ b/src/core/lib/iomgr/ctiller_ev_epoll_linux.c
@@ -0,0 +1,461 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/ev_epoll_linux.h"
+
+#include <errno.h>
+#include <string.h>
+#include <sys/epoll.h>
+#include <unistd.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/atm.h>
+#include <grpc/support/log.h>
+#include <grpc/support/useful.h>
+
+#include "src/core/lib/iomgr/iomgr_internal.h"
+
+/* TODO(sreek) Remove this file */
+
+
+////////////////////////////////////////////////////////////////////////////////
+// Definitions
+
+#define STATE_NOT_READY ((gpr_atm)0)
+#define STATE_READY ((gpr_atm)1)
+
+typedef enum { POLLABLE_FD, POLLABLE_EPOLL_SET } pollable_type;
+
+typedef struct {
+  pollable_type type;
+  int fd;
+  grpc_iomgr_object iomgr_object;
+} pollable_object;
+
+typedef struct polling_island {
+  pollable_object pollable;
+  gpr_mu mu;
+  int refs;
+  grpc_fd *only_fd;
+  struct polling_island *became;
+  struct polling_island *next;
+} polling_island;
+
+struct grpc_fd {
+  pollable_object pollable;
+
+  // each event atomic is a tri state:
+  //   STATE_NOT_READY - no event received, nobody waiting for it either
+  //   STATE_READY - event received, nobody waiting for it
+  //   closure pointer - no event received, upper layer is waiting for it
+  gpr_atm on_readable;
+  gpr_atm on_writable;
+
+  // mutex guarding set_ready & shutdown state
+  gpr_mu set_ready_mu;
+  bool shutdown;
+
+  // mutex protecting polling_island
+  gpr_mu polling_island_mu;
+  // current polling island
+  polling_island *polling_island;
+
+  grpc_fd *next_free;
+};
+
+struct grpc_pollset_worker {};
+
+struct grpc_pollset {
+  gpr_mu mu;
+  // current polling island
+  polling_island *polling_island;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+// Polling island implementation
+
+static gpr_mu g_pi_freelist_mu;
+static polling_island *g_first_free_pi;
+
+static void add_pollable_to_epoll_set(pollable_object *pollable, int epoll_set,
+                                      uint32_t events) {
+  struct epoll_event ev;
+  ev.events = events;
+  ev.data.ptr = pollable;
+  int err = epoll_ctl(epoll_set, EPOLL_CTL_ADD, pollable->fd, &ev);
+  if (err < 0) {
+    gpr_log(GPR_ERROR, "epoll_ctl add for %d faild: %s", pollable->fd,
+            strerror(errno));
+  }
+}
+
+static void add_fd_to_epoll_set(grpc_fd *fd, int epoll_set) {
+  add_pollable_to_epoll_set(&fd->pollable, epoll_set,
+                            EPOLLIN | EPOLLOUT | EPOLLET);
+}
+
+static void add_island_to_epoll_set(polling_island *pi, int epoll_set) {
+  add_pollable_to_epoll_set(&pi->pollable, epoll_set, EPOLLIN | EPOLLET);
+}
+
+static polling_island *polling_island_create(grpc_fd *initial_fd) {
+  polling_island *r = NULL;
+  gpr_mu_lock(&g_pi_freelist_mu);
+  if (g_first_free_pi == NULL) {
+    r = gpr_malloc(sizeof(*r));
+    r->pollable.type = POLLABLE_EPOLL_SET;
+    gpr_mu_init(&r->mu);
+  } else {
+    r = g_first_free_pi;
+    g_first_free_pi = r->next;
+  }
+  gpr_mu_unlock(&g_pi_freelist_mu);
+
+  r->pollable.fd = epoll_create1(EPOLL_CLOEXEC);
+  GPR_ASSERT(r->pollable.fd >= 0);
+
+  gpr_mu_lock(&r->mu);
+  r->only_fd = initial_fd;
+  r->refs = 2;  // creation of a polling island => a referencing pollset & fd
+  gpr_mu_unlock(&r->mu);
+
+  add_fd_to_epoll_set(initial_fd, r->pollable.fd);
+  return r;
+}
+
+static void polling_island_delete(polling_island *p) {
+  gpr_mu_lock(&g_pi_freelist_mu);
+  p->next = g_first_free_pi;
+  g_first_free_pi = p;
+  gpr_mu_unlock(&g_pi_freelist_mu);
+}
+
+static polling_island *polling_island_add(polling_island *p, grpc_fd *fd) {
+  gpr_mu_lock(&p->mu);
+  p->only_fd = NULL;
+  p->refs++;  // new fd picks up a ref
+  gpr_mu_unlock(&p->mu);
+
+  add_fd_to_epoll_set(fd, p->pollable.fd);
+
+  return p;
+}
+
+static void add_siblings_to(polling_island *siblings, polling_island *dest) {
+  polling_island *sibling_tail = dest;
+  while (sibling_tail->next != NULL) {
+    sibling_tail = sibling_tail->next;
+  }
+  sibling_tail->next = siblings;
+}
+
+static polling_island *polling_island_merge(polling_island *a,
+                                            polling_island *b) {
+  GPR_ASSERT(a != b);
+  polling_island *out;
+
+  gpr_mu_lock(&GPR_MIN(a, b)->mu);
+  gpr_mu_lock(&GPR_MAX(a, b)->mu);
+
+  GPR_ASSERT(a->became == NULL);
+  GPR_ASSERT(b->became == NULL);
+
+  if (a->only_fd == NULL && b->only_fd == NULL) {
+    b->became = a;
+    add_siblings_to(b, a);
+    add_island_to_epoll_set(b, a->pollable.fd);
+    out = a;
+  } else if (a->only_fd == NULL) {
+    GPR_ASSERT(b->only_fd != NULL);
+    add_fd_to_epoll_set(b->only_fd, a->pollable.fd);
+    b->became = a;
+    out = a;
+  } else if (b->only_fd == NULL) {
+    GPR_ASSERT(a->only_fd != NULL);
+    add_fd_to_epoll_set(a->only_fd, b->pollable.fd);
+    a->became = b;
+    out = b;
+  } else {
+    add_fd_to_epoll_set(b->only_fd, a->pollable.fd);
+    a->only_fd = NULL;
+    b->only_fd = NULL;
+    b->became = a;
+    out = a;
+  }
+
+  gpr_mu_unlock(&a->mu);
+  gpr_mu_unlock(&b->mu);
+
+  return out;
+}
+
+static polling_island *polling_island_update_and_lock(polling_island *p) {
+  gpr_mu_lock(&p->mu);
+  if (p->became != NULL) {
+    do {
+      polling_island *from = p;
+      p = p->became;
+      gpr_mu_lock(&p->mu);
+      bool delete_from = 0 == --from->refs;
+      p->refs++;
+      gpr_mu_unlock(&from->mu);
+      if (delete_from) {
+        polling_island_delete(from);
+      }
+    } while (p->became != NULL);
+  }
+  return p;
+}
+
+static polling_island *polling_island_ref(polling_island *p) {
+  gpr_mu_lock(&p->mu);
+  gpr_mu_unlock(&p->mu);
+  return p;
+}
+
+static void polling_island_drop(polling_island *p) {}
+
+static polling_island *polling_island_update(polling_island *p,
+                                             int updating_owner_count) {
+  p = polling_island_update_and_lock(p);
+  GPR_ASSERT(p->refs != 0);
+  p->refs += updating_owner_count;
+  gpr_mu_unlock(&p->mu);
+  return p;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// FD implementation
+
+static gpr_mu g_fd_freelist_mu;
+static grpc_fd *g_first_free_fd;
+
+static grpc_fd *fd_create(int fd, const char *name) {
+  grpc_fd *r = NULL;
+  gpr_mu_lock(&g_fd_freelist_mu);
+  if (g_first_free_fd == NULL) {
+    r = gpr_malloc(sizeof(*r));
+    r->pollable.type = POLLABLE_FD;
+    gpr_atm_rel_store(&r->on_readable, 0);
+    gpr_atm_rel_store(&r->on_writable, 0);
+    gpr_mu_init(&r->polling_island_mu);
+    gpr_mu_init(&r->set_ready_mu);
+  } else {
+    r = g_first_free_fd;
+    g_first_free_fd = r->next_free;
+  }
+  gpr_mu_unlock(&g_fd_freelist_mu);
+
+  r->pollable.fd = fd;
+  grpc_iomgr_register_object(&r->pollable.iomgr_object, name);
+  r->next_free = NULL;
+  return r;
+}
+
+static int fd_wrapped_fd(grpc_fd *fd) { return fd->pollable.fd; }
+
+static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                      grpc_closure *on_done, int *release_fd,
+                      const char *reason) {
+  if (release_fd != NULL) {
+    *release_fd = fd->pollable.fd;
+  } else {
+    close(fd->pollable.fd);
+  }
+
+  gpr_mu_lock(&fd->polling_island_mu);
+  if (fd->polling_island != NULL) {
+    polling_island_drop(fd->polling_island);
+  }
+  gpr_mu_unlock(&fd->polling_island_mu);
+
+  gpr_mu_lock(&g_fd_freelist_mu);
+  fd->next_free = g_first_free_fd;
+  g_first_free_fd = fd;
+  grpc_iomgr_unregister_object(&fd->pollable.iomgr_object);
+  gpr_mu_unlock(&g_fd_freelist_mu);
+
+  grpc_exec_ctx_enqueue(exec_ctx, on_done, true, NULL);
+}
+
+static void notify_on(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                      grpc_closure *closure, gpr_atm *state) {
+  if (gpr_atm_acq_cas(state, STATE_NOT_READY, (gpr_atm)closure)) {
+    // state was not ready, and is now the closure - we're done */
+  } else {
+    // cas failed - we MUST be in STATE_READY (can't request two notifications
+    // for the same event)
+    // flip back to not ready, enqueue the closure directly
+    GPR_ASSERT(gpr_atm_rel_cas(state, STATE_READY, STATE_NOT_READY));
+    grpc_exec_ctx_enqueue(exec_ctx, closure, true, NULL);
+  }
+}
+
+static void fd_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                              grpc_closure *closure) {
+  notify_on(exec_ctx, fd, closure, &fd->on_readable);
+}
+
+static void fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                               grpc_closure *closure) {
+  notify_on(exec_ctx, fd, closure, &fd->on_readable);
+}
+
+static void destroy_fd_freelist(void) {
+  while (g_first_free_fd) {
+    grpc_fd *next = g_first_free_fd->next_free;
+    gpr_mu_destroy(&g_first_free_fd->polling_island_mu);
+    gpr_free(next);
+    g_first_free_fd = next;
+  }
+}
+
+static void set_ready_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                             gpr_atm *state) {
+  if (gpr_atm_acq_cas(state, STATE_NOT_READY, STATE_READY)) {
+    // state was not ready, and is now ready - we're done
+  } else {
+    // cas failed - either there's a closure queued which we should consume OR
+    // the state was already STATE_READY
+    gpr_atm cur_state = gpr_atm_acq_load(state);
+    if (cur_state != STATE_READY) {
+      // state wasn't STATE_READY - it *must* have been a closure
+      // since it's illegal to ask for notification twice, it's safe to assume
+      // that we'll resume being the closure
+      GPR_ASSERT(gpr_atm_rel_cas(state, cur_state, STATE_NOT_READY));
+      grpc_exec_ctx_enqueue(exec_ctx, (grpc_closure *)cur_state, !fd->shutdown,
+                            NULL);
+    }
+  }
+}
+
+static void fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
+  gpr_mu_lock(&fd->set_ready_mu);
+  GPR_ASSERT(!fd->shutdown);
+  fd->shutdown = 1;
+  set_ready_locked(exec_ctx, fd, &fd->on_readable);
+  set_ready_locked(exec_ctx, fd, &fd->on_writable);
+  gpr_mu_unlock(&fd->set_ready_mu);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Pollset implementation
+
+static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
+  gpr_mu_init(&pollset->mu);
+  *mu = &pollset->mu;
+  pollset->polling_island = NULL;
+}
+
+static void pollset_destroy(grpc_pollset *pollset) {
+  gpr_mu_destroy(&pollset->mu);
+  if (pollset->polling_island) {
+    polling_island_drop(pollset->polling_island);
+  }
+}
+
+static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                           struct grpc_fd *fd) {
+  gpr_mu_lock(&pollset->mu);
+  gpr_mu_lock(&fd->polling_island_mu);
+
+  polling_island *new;
+
+  if (fd->polling_island == NULL) {
+    if (pollset->polling_island == NULL) {
+      new = polling_island_create(fd);
+    } else {
+      new = polling_island_add(pollset->polling_island, fd);
+    }
+  } else if (pollset->polling_island == NULL) {
+    new = polling_island_ref(fd->polling_island);
+  } else if (pollset->polling_island != fd->polling_island) {
+    new = polling_island_merge(pollset->polling_island, fd->polling_island);
+  } else {
+    new = polling_island_update(pollset->polling_island, 1);
+  }
+
+  fd->polling_island = pollset->polling_island = new;
+
+  gpr_mu_unlock(&fd->polling_island_mu);
+  gpr_mu_unlock(&pollset->mu);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Engine binding
+
+static void shutdown_engine(void) { destroy_fd_freelist(); }
+
+static const grpc_event_engine_vtable vtable = {
+    .pollset_size = sizeof(grpc_pollset),
+
+    .fd_create = fd_create,
+    .fd_wrapped_fd = fd_wrapped_fd,
+    .fd_orphan = fd_orphan,
+    .fd_shutdown = fd_shutdown,
+    .fd_notify_on_read = fd_notify_on_read,
+    .fd_notify_on_write = fd_notify_on_write,
+
+    .pollset_init = pollset_init,
+    .pollset_shutdown = pollset_shutdown,
+    .pollset_reset = pollset_reset,
+    .pollset_destroy = pollset_destroy,
+    .pollset_work = pollset_work,
+    .pollset_kick = pollset_kick,
+    .pollset_add_fd = pollset_add_fd,
+
+    .pollset_set_create = pollset_set_create,
+    .pollset_set_destroy = pollset_set_destroy,
+    .pollset_set_add_pollset = pollset_set_add_pollset,
+    .pollset_set_del_pollset = pollset_set_del_pollset,
+    .pollset_set_add_pollset_set = pollset_set_add_pollset_set,
+    .pollset_set_del_pollset_set = pollset_set_del_pollset_set,
+    .pollset_set_add_fd = pollset_set_add_fd,
+    .pollset_set_del_fd = pollset_set_del_fd,
+
+    .kick_poller = kick_poller,
+
+    .shutdown_engine = shutdown_engine,
+};
+
+static bool is_epoll_available(void) {
+  abort();
+  return false;
+}
+
+const grpc_event_engine_vtable *grpc_init_poll_posix(void) {
+  if (!is_epoll_available()) {
+    return NULL;
+  }
+  return &vtable;
+}

From d7d6eed78822ed8de14fdf9b39255365946cf8c4 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Tue, 31 May 2016 09:44:08 -0700
Subject: [PATCH 023/280] Correct typo

---
 src/core/lib/iomgr/ev_posix.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/lib/iomgr/ev_posix.c b/src/core/lib/iomgr/ev_posix.c
index 404ef2a64b9..96399ef8379 100644
--- a/src/core/lib/iomgr/ev_posix.c
+++ b/src/core/lib/iomgr/ev_posix.c
@@ -44,7 +44,7 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/useful.h>
 
-#include "src/core/lib/iomgr/ev_epoll_linux.h"
+#include "src/core/lib/iomgr/ev_epoll_posix.h"
 #include "src/core/lib/iomgr/ev_poll_posix.h"
 #include "src/core/lib/support/env.h"
 

From 8c6c9067bc001a7cd94c2689570a6ec27affee82 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Tue, 31 May 2016 10:57:20 -0700
Subject: [PATCH 024/280] run epoll tests too

---
 tools/run_tests/run_tests.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index ddaf96c345a..f3b191feab7 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -157,7 +157,7 @@ class CLanguage(object):
       'windows': ['all'],
       'mac': ['all'],
       'posix': ['all'],
-      'linux': ['poll'],
+      'linux': ['poll', 'epoll'],
     }
     for target in binaries:
       polling_strategies = (POLLING_STRATEGIES[self.platform]

From 5098f91159f2a5c0494688b8cfaff4debef5686f Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Tue, 31 May 2016 10:58:17 -0700
Subject: [PATCH 025/280] Rewrite all the pollset and fd functions in
 ev_epoll_linux.c

---
 src/core/lib/iomgr/ev_epoll_linux.c | 161 +++++++---------------------
 1 file changed, 38 insertions(+), 123 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 7793a952016..1201c10a7e0 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -67,10 +67,10 @@ struct polling_island;
 struct grpc_fd {
   int fd;
   /* refst format:
-     bit0:   1=active/0=orphaned
-     bit1-n: refcount
-     meaning that mostly we ref by two to avoid altering the orphaned bit,
-     and just unref by 1 when we're ready to flag the object as orphaned */
+       bit 0    : 1=Active / 0=Orphaned
+       bits 1-n : refcount
+     - ref/unref by two to avoid altering the orphaned bit
+     - To orphan, unref by 1 */
   gpr_atm refst;
 
   gpr_mu mu;
@@ -84,12 +84,11 @@ struct grpc_fd {
   /* Mutex protecting the 'polling_island' field */
   gpr_mu pi_mu;
 
-  /* The polling island to which this fd belongs to. An fd belongs to exactly
-     one polling island */
+  /* The polling island to which this fd belongs to.
+   * An fd belongs to exactly one polling island */
   struct polling_island *polling_island;
 
   struct grpc_fd *freelist_next;
-
   grpc_closure *on_done_closure;
 
   grpc_iomgr_object iomgr_object;
@@ -141,7 +140,6 @@ typedef struct polling_island {
 
   /* Polling islands that are no longer needed are kept in a freelist so that
      they can be reused. This field points to the next polling island in the
-     free list. Note that this is only used if the polling island is in the
      free list */
   struct polling_island *next_free;
 } polling_island;
@@ -185,7 +183,7 @@ static void polling_island_add_fds_locked(polling_island *pi, grpc_fd **fds,
  * TODO: sreek - Might have to unref the fds (assuming whether we add a ref to
  * the fd when adding it to the epollset) */
 /* The caller is expected to hold pi->mu lock before calling this function */
-static void polling_island_clear_fds_locked(polling_island *pi) {
+static void polling_island_remove_all_fds_locked(polling_island *pi) {
   int err;
   size_t i;
 
@@ -392,7 +390,7 @@ polling_island *polling_island_merge(polling_island *p, polling_island *q) {
 
   // Move all the fds from polling_island p to polling_island q
   polling_island_add_fds_locked(q, p->fds, p->fd_cnt);
-  polling_island_clear_fds_locked(p);
+  polling_island_remove_all_fds_locked(p);
 
   q->ref_cnt += p->ref_cnt;
 
@@ -411,14 +409,7 @@ static void polling_island_global_init() {
  * pollset declarations
  */
 
-typedef struct grpc_cached_wakeup_fd {
-  grpc_wakeup_fd fd;
-  struct grpc_cached_wakeup_fd *next;
-} grpc_cached_wakeup_fd;
-
 struct grpc_pollset_worker {
-  grpc_cached_wakeup_fd *wakeup_fd;
-  int reevaluate_polling_on_wakeup;
   int kicked_specifically;
   pthread_t pt_id;
   struct grpc_pollset_worker *next;
@@ -441,9 +432,6 @@ struct grpc_pollset {
   /* The polling island to which this fd belongs to. An fd belongs to exactly
      one polling island */
   struct polling_island *polling_island;
-
-  /* Local cache of eventfds for workers */
-  grpc_cached_wakeup_fd *local_wakeup_cache;
 };
 
 /* Add an fd to a pollset */
@@ -465,8 +453,6 @@ static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
 
 /* Allow kick to wakeup the currently polling worker */
 #define GRPC_POLLSET_CAN_KICK_SELF 1
-/* Force the wakee to repoll when awoken */
-#define GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP 2
 /* As per pollset_kick, with an extended set of flags (defined above)
    -- mostly for fd_posix's use. */
 static void pollset_kick_ext(grpc_pollset *p,
@@ -815,34 +801,25 @@ static void pollset_kick_ext(grpc_pollset *p,
   if (specific_worker != NULL) {
     if (specific_worker == GRPC_POLLSET_KICK_BROADCAST) {
       GPR_TIMER_BEGIN("pollset_kick_ext.broadcast", 0);
-      GPR_ASSERT((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) == 0);
       for (specific_worker = p->root_worker.next;
            specific_worker != &p->root_worker;
            specific_worker = specific_worker->next) {
-        grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
+        pthread_kill(specific_worker->pt_id, SIGUSR1);
       }
       p->kicked_without_pollers = 1;
       GPR_TIMER_END("pollset_kick_ext.broadcast", 0);
     } else if (gpr_tls_get(&g_current_thread_worker) !=
                (intptr_t)specific_worker) {
       GPR_TIMER_MARK("different_thread_worker", 0);
-      if ((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) != 0) {
-        specific_worker->reevaluate_polling_on_wakeup = 1;
-      }
       specific_worker->kicked_specifically = 1;
-      grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
       /* TODO (sreek): Refactor this into a separate file*/
       pthread_kill(specific_worker->pt_id, SIGUSR1);
     } else if ((flags & GRPC_POLLSET_CAN_KICK_SELF) != 0) {
       GPR_TIMER_MARK("kick_yoself", 0);
-      if ((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) != 0) {
-        specific_worker->reevaluate_polling_on_wakeup = 1;
-      }
       specific_worker->kicked_specifically = 1;
-      grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
+      pthread_kill(specific_worker->pt_id, SIGUSR1);
     }
   } else if (gpr_tls_get(&g_current_thread_poller) != (intptr_t)p) {
-    GPR_ASSERT((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) == 0);
     GPR_TIMER_MARK("kick_anonymous", 0);
     specific_worker = pop_front_worker(p);
     if (specific_worker != NULL) {
@@ -860,7 +837,7 @@ static void pollset_kick_ext(grpc_pollset *p,
       if (specific_worker != NULL) {
         GPR_TIMER_MARK("finally_kick", 0);
         push_back_worker(p, specific_worker);
-        grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
+        pthread_kill(specific_worker->pt_id, SIGUSR1);
       }
     } else {
       GPR_TIMER_MARK("kicked_no_pollers", 0);
@@ -911,8 +888,6 @@ static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
   pollset->shutting_down = 0;
   pollset->called_shutdown = 0;
   pollset->kicked_without_pollers = 0;
-  pollset->local_wakeup_cache = NULL;
-  pollset->kicked_without_pollers = 0;
 
   multipoll_with_epoll_pollset_create_efd(pollset);
 }
@@ -926,12 +901,6 @@ static void pollset_destroy(grpc_pollset *pollset) {
 
   multipoll_with_epoll_pollset_destroy(pollset);
 
-  while (pollset->local_wakeup_cache) {
-    grpc_cached_wakeup_fd *next = pollset->local_wakeup_cache->next;
-    grpc_wakeup_fd_destroy(&pollset->local_wakeup_cache->fd);
-    gpr_free(pollset->local_wakeup_cache);
-    pollset->local_wakeup_cache = next;
-  }
   gpr_mu_destroy(&pollset->pi_mu);
   gpr_mu_destroy(&pollset->mu);
 }
@@ -974,14 +943,6 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   GPR_TIMER_BEGIN("pollset_work", 0);
   /* this must happen before we (potentially) drop pollset->mu */
   worker.next = worker.prev = NULL;
-  worker.reevaluate_polling_on_wakeup = 0;
-  if (pollset->local_wakeup_cache != NULL) {
-    worker.wakeup_fd = pollset->local_wakeup_cache;
-    pollset->local_wakeup_cache = worker.wakeup_fd->next;
-  } else {
-    worker.wakeup_fd = gpr_malloc(sizeof(*worker.wakeup_fd));
-    grpc_wakeup_fd_init(&worker.wakeup_fd->fd);
-  }
   worker.kicked_specifically = 0;
 
   /* TODO(sreek): Abstract this thread id stuff out into a separate file */
@@ -1026,27 +987,12 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
       gpr_mu_lock(&pollset->mu);
       locked = 1;
     }
-    /* If we're forced to re-evaluate polling (via pollset_kick with
-       GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) then we land here and force
-       a loop */
-    if (worker.reevaluate_polling_on_wakeup) {
-      worker.reevaluate_polling_on_wakeup = 0;
-      pollset->kicked_without_pollers = 0;
-      if (queued_work || worker.kicked_specifically) {
-        /* If there's queued work on the list, then set the deadline to be
-           immediate so we get back out of the polling loop quickly */
-        deadline = gpr_inf_past(GPR_CLOCK_MONOTONIC);
-      }
-      keep_polling = 1;
-    }
   }
   if (added_worker) {
     remove_worker(pollset, &worker);
     gpr_tls_set(&g_current_thread_worker, 0);
   }
-  /* release wakeup fd to the local pool */
-  worker.wakeup_fd->next = pollset->local_wakeup_cache;
-  pollset->local_wakeup_cache = worker.wakeup_fd;
+
   /* check shutdown conditions */
   if (pollset->shutting_down) {
     if (pollset_has_workers(pollset)) {
@@ -1135,10 +1081,9 @@ static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
     }
   } else if (fd->polling_island == NULL) {
     pi_new = polling_island_update_and_lock(pollset->polling_island, 1, 1);
-
   } else if (pollset->polling_island == NULL) {
     pi_new = polling_island_update_and_lock(fd->polling_island, 1, 1);
-  } else {  // Non null and different
+  } else {
     pi_new = polling_island_merge(fd->polling_island, pollset->polling_island);
   }
 
@@ -1182,9 +1127,7 @@ static void multipoll_with_epoll_pollset_maybe_work_and_unlock(
   struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS];
   int epoll_fd = pollset->epoll_fd;
   int ep_rv;
-  int poll_rv;
   int timeout_ms;
-  struct pollfd pfds[2];
 
   /* If you want to ignore epoll's ability to sanely handle parallel pollers,
    * for a more apples-to-apples performance comparison with poll, add a
@@ -1196,63 +1139,35 @@ static void multipoll_with_epoll_pollset_maybe_work_and_unlock(
 
   timeout_ms = poll_deadline_to_millis_timeout(deadline, now);
 
-  pfds[0].fd = GRPC_WAKEUP_FD_GET_READ_FD(&worker->wakeup_fd->fd);
-  pfds[0].events = POLLIN;
-  pfds[0].revents = 0;
-  pfds[1].fd = epoll_fd;
-  pfds[1].events = POLLIN;
-  pfds[1].revents = 0;
-
-  /* TODO(vpai): Consider first doing a 0 timeout poll here to avoid
-     even going into the blocking annotation if possible */
-  GPR_TIMER_BEGIN("poll", 0);
-  GRPC_SCHEDULING_START_BLOCKING_REGION;
-  poll_rv = grpc_poll_function(pfds, 2, timeout_ms);
-  GRPC_SCHEDULING_END_BLOCKING_REGION;
-  GPR_TIMER_END("poll", 0);
-
-  if (poll_rv < 0) {
-    if (errno != EINTR) {
-      gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
-    }
-  } else if (poll_rv == 0) {
-    /* do nothing */
-  } else {
-    if (pfds[0].revents) {
-      grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd->fd);
-    }
-    if (pfds[1].revents) {
-      do {
-        /* The following epoll_wait never blocks; it has a timeout of 0 */
-        ep_rv = epoll_wait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, 0);
-        if (ep_rv < 0) {
-          if (errno != EINTR) {
-            gpr_log(GPR_ERROR, "epoll_wait() failed: %s", strerror(errno));
-          }
+  do {
+    /* The following epoll_wait never blocks; it has a timeout of 0 */
+    ep_rv = epoll_wait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, timeout_ms);
+    if (ep_rv < 0) {
+      if (errno != EINTR) {
+        gpr_log(GPR_ERROR, "epoll_wait() failed: %s", strerror(errno));
+      }
+    } else {
+      int i;
+      for (i = 0; i < ep_rv; ++i) {
+        grpc_fd *fd = ep_ev[i].data.ptr;
+        /* TODO(klempner): We might want to consider making err and pri
+         * separate events */
+        int cancel = ep_ev[i].events & (EPOLLERR | EPOLLHUP);
+        int read_ev = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
+        int write_ev = ep_ev[i].events & EPOLLOUT;
+        if (fd == NULL) {
+          grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
         } else {
-          int i;
-          for (i = 0; i < ep_rv; ++i) {
-            grpc_fd *fd = ep_ev[i].data.ptr;
-            /* TODO(klempner): We might want to consider making err and pri
-             * separate events */
-            int cancel = ep_ev[i].events & (EPOLLERR | EPOLLHUP);
-            int read_ev = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
-            int write_ev = ep_ev[i].events & EPOLLOUT;
-            if (fd == NULL) {
-              grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
-            } else {
-              if (read_ev || cancel) {
-                fd_become_readable(exec_ctx, fd);
-              }
-              if (write_ev || cancel) {
-                fd_become_writable(exec_ctx, fd);
-              }
-            }
+          if (read_ev || cancel) {
+            fd_become_readable(exec_ctx, fd);
+          }
+          if (write_ev || cancel) {
+            fd_become_writable(exec_ctx, fd);
           }
         }
-      } while (ep_rv == GRPC_EPOLL_MAX_EVENTS);
+      }
     }
-  }
+  } while (ep_rv == GRPC_EPOLL_MAX_EVENTS);
 }
 
 static void multipoll_with_epoll_pollset_finish_shutdown(

From 894900734662b7012d7b858db716c3cc1e9f8179 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Wed, 1 Jun 2016 08:52:43 -0700
Subject: [PATCH 026/280] Add a epoll_test.c file to experiment. REMOVE this
 from the final commit

---
 Makefile                                      |  36 +++
 build.yaml                                    |  12 +
 test/core/network_benchmarks/epoll_test.c     | 263 ++++++++++++++++++
 .../network_benchmarks/low_level_ping_pong.c  |   2 +
 tools/run_tests/sources_and_headers.json      |  16 ++
 tools/run_tests/tests.json                    |  15 +
 6 files changed, 344 insertions(+)
 create mode 100644 test/core/network_benchmarks/epoll_test.c

diff --git a/Makefile b/Makefile
index 063698d943f..235f32d9a30 100644
--- a/Makefile
+++ b/Makefile
@@ -903,6 +903,7 @@ dns_resolver_connectivity_test: $(BINDIR)/$(CONFIG)/dns_resolver_connectivity_te
 dns_resolver_test: $(BINDIR)/$(CONFIG)/dns_resolver_test
 dualstack_socket_test: $(BINDIR)/$(CONFIG)/dualstack_socket_test
 endpoint_pair_test: $(BINDIR)/$(CONFIG)/endpoint_pair_test
+epoll_test: $(BINDIR)/$(CONFIG)/epoll_test
 fd_conservation_posix_test: $(BINDIR)/$(CONFIG)/fd_conservation_posix_test
 fd_posix_test: $(BINDIR)/$(CONFIG)/fd_posix_test
 fling_client: $(BINDIR)/$(CONFIG)/fling_client
@@ -1234,6 +1235,7 @@ buildtests_c: privatelibs_c \
   $(BINDIR)/$(CONFIG)/dns_resolver_test \
   $(BINDIR)/$(CONFIG)/dualstack_socket_test \
   $(BINDIR)/$(CONFIG)/endpoint_pair_test \
+  $(BINDIR)/$(CONFIG)/epoll_test \
   $(BINDIR)/$(CONFIG)/fd_conservation_posix_test \
   $(BINDIR)/$(CONFIG)/fd_posix_test \
   $(BINDIR)/$(CONFIG)/fling_client \
@@ -1497,6 +1499,8 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/dualstack_socket_test || ( echo test dualstack_socket_test failed ; exit 1 )
 	$(E) "[RUN]     Testing endpoint_pair_test"
 	$(Q) $(BINDIR)/$(CONFIG)/endpoint_pair_test || ( echo test endpoint_pair_test failed ; exit 1 )
+	$(E) "[RUN]     Testing epoll_test"
+	$(Q) $(BINDIR)/$(CONFIG)/epoll_test || ( echo test epoll_test failed ; exit 1 )
 	$(E) "[RUN]     Testing fd_conservation_posix_test"
 	$(Q) $(BINDIR)/$(CONFIG)/fd_conservation_posix_test || ( echo test fd_conservation_posix_test failed ; exit 1 )
 	$(E) "[RUN]     Testing fd_posix_test"
@@ -6577,6 +6581,38 @@ endif
 endif
 
 
+EPOLL_TEST_SRC = \
+    test/core/network_benchmarks/epoll_test.c \
+
+EPOLL_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(EPOLL_TEST_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/epoll_test: openssl_dep_error
+
+else
+
+
+
+$(BINDIR)/$(CONFIG)/epoll_test: $(EPOLL_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LD) $(LDFLAGS) $(EPOLL_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/epoll_test
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/core/network_benchmarks/epoll_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+
+deps_epoll_test: $(EPOLL_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(EPOLL_TEST_OBJS:.o=.dep)
+endif
+endif
+
+
 FD_CONSERVATION_POSIX_TEST_SRC = \
     test/core/iomgr/fd_conservation_posix_test.c \
 
diff --git a/build.yaml b/build.yaml
index 2f3d07071da..db9787546ad 100644
--- a/build.yaml
+++ b/build.yaml
@@ -1321,6 +1321,18 @@ targets:
   - grpc
   - gpr_test_util
   - gpr
+- name: epoll_test
+  build: test
+  language: c
+  src:
+  - test/core/network_benchmarks/epoll_test.c
+  deps:
+  - grpc_test_util
+  - grpc
+  - gpr_test_util
+  - gpr
+  platforms:
+  - linux
 - name: fd_conservation_posix_test
   build: test
   language: c
diff --git a/test/core/network_benchmarks/epoll_test.c b/test/core/network_benchmarks/epoll_test.c
new file mode 100644
index 00000000000..a918dd9bb94
--- /dev/null
+++ b/test/core/network_benchmarks/epoll_test.c
@@ -0,0 +1,263 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/* TODO: sreek: REMOVE THIS FILE */
+
+#include <grpc/support/port_platform.h>
+
+#include <errno.h>
+#include <netinet/ip.h>
+#include <poll.h>
+#include <signal.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/epoll.h>
+#include <sys/eventfd.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/useful.h>
+
+int g_signal_num = SIGUSR1;
+
+int g_timeout_secs = 2;
+
+int g_eventfd_create = 1;
+int g_eventfd_wakeup = 0;
+int g_eventfd_teardown = 0;
+int g_close_epoll_fd = 1;
+
+typedef struct thread_args {
+  gpr_thd_id id;
+  int epoll_fd;
+  int thread_num;
+} thread_args;
+
+static int eventfd_create() {
+  if (!g_eventfd_create) {
+    return -1;
+  }
+
+  int efd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
+  GPR_ASSERT(efd >= 0);
+  return efd;
+}
+
+static void eventfd_wakeup(int efd) {
+  if (!g_eventfd_wakeup) {
+    return;
+  }
+
+  int err;
+  do {
+    err = eventfd_write(efd, 1);
+  } while (err < 0 && errno == EINTR);
+}
+
+static void epoll_teardown(int epoll_fd, int fd) {
+  if (!g_eventfd_teardown) {
+    return;
+  }
+
+  if (epoll_ctl(epoll_fd, EPOLL_CTL_DEL, fd, NULL) < 0) {
+    if (errno != ENOENT) {
+      gpr_log(GPR_ERROR, "epoll_ctl: %s", strerror(errno));
+      GPR_ASSERT(0);
+    }
+  }
+}
+
+/* Special case for epoll, where we need to create the fd ahead of time. */
+static int epoll_setup(int fd) {
+  int epoll_fd;
+  struct epoll_event ev;
+
+  epoll_fd = epoll_create(1);
+  if (epoll_fd < 0) {
+    gpr_log(GPR_ERROR, "epoll_create: %s", strerror(errno));
+    return -1;
+  }
+
+  ev.events = (uint32_t)EPOLLIN;
+  ev.data.fd = fd;
+  if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) {
+    if (errno != EEXIST) {
+      gpr_log(GPR_ERROR, "epoll_ctl: %s", strerror(errno));
+      return -1;
+    }
+
+    gpr_log(GPR_ERROR, "epoll_ctl: The fd %d already exists", fd);
+  }
+
+  return epoll_fd;
+}
+
+#define GRPC_EPOLL_MAX_EVENTS 1000
+static void thread_main(void *args) {
+  int ep_rv;
+  struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS];
+  int fd;
+  int i;
+  int cancel;
+  int read;
+  int write;
+  thread_args *thd_args = args;
+  sigset_t new_mask;
+  sigset_t orig_mask;
+  int keep_polling = 0;
+
+  gpr_log(GPR_INFO, "Thread: %d Started", thd_args->thread_num);
+
+  do {
+    keep_polling = 0;
+
+    /* Mask the signal before getting the epoll_fd */
+    gpr_log(GPR_INFO, "Thread: %d Blocking signal: %d", thd_args->thread_num,
+            g_signal_num);
+    sigemptyset(&new_mask);
+    sigaddset(&new_mask, g_signal_num);
+    pthread_sigmask(SIG_BLOCK, &new_mask, &orig_mask);
+
+    gpr_log(GPR_INFO, "Thread: %d Waiting on epoll_wait()",
+            thd_args->thread_num);
+    ep_rv = epoll_pwait(thd_args->epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS,
+                        g_timeout_secs * 5000, &orig_mask);
+    gpr_log(GPR_INFO, "Thread: %d out of epoll_wait. ep_rv = %d",
+            thd_args->thread_num, ep_rv);
+
+    if (ep_rv < 0) {
+      if (errno != EINTR) {
+        gpr_log(GPR_ERROR, "Thread: %d. epoll_wait failed with error: %d",
+                thd_args->thread_num, errno);
+      } else {
+        gpr_log(GPR_INFO,
+                "Thread: %d. epoll_wait was interrupted. Polling again >>>>>>>",
+                thd_args->thread_num);
+        keep_polling = 1;
+      }
+    } else {
+      if (ep_rv == 0) {
+        gpr_log(GPR_INFO,
+                "Thread: %d - epoll_wait returned 0. Most likely a timeout. "
+                "Polling again",
+                thd_args->thread_num);
+        keep_polling = 1;
+      }
+
+      for (i = 0; i < ep_rv; i++) {
+        fd = ep_ev[i].data.fd;
+        cancel = ep_ev[i].events & (EPOLLERR | EPOLLHUP);
+        read = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
+        write = ep_ev[i].events & EPOLLOUT;
+        gpr_log(GPR_INFO,
+                "Thread: %d. epoll_wait returned that fd: %d has event of "
+                "interest. read: %d, write: %d, cancel: %d",
+                thd_args->thread_num, fd, read, write, cancel);
+      }
+    }
+  } while (keep_polling);
+}
+
+static void close_fd(int fd) {
+  if (!g_close_epoll_fd) {
+    return;
+  }
+
+  gpr_log(GPR_INFO, "*** Closing fd : %d ****", fd);
+  close(fd);
+  gpr_log(GPR_INFO, "*** Closed fd : %d ****", fd);
+}
+
+
+static void sig_handler(int sig_num) {
+  gpr_log(GPR_INFO, "<<<<< Received signal %d", sig_num);
+}
+
+static void set_signal_handler() {
+  gpr_log(GPR_INFO, "Setting signal handler");
+  signal(g_signal_num, sig_handler);
+}
+
+#define NUM_THREADS 2
+int main(int argc, char **argv) {
+  int efd;
+  int epoll_fd;
+  int i;
+  thread_args thd_args[NUM_THREADS];
+  gpr_thd_options options = gpr_thd_options_default();
+
+  set_signal_handler();
+
+  gpr_log(GPR_INFO, "Starting..");
+  efd = eventfd_create();
+  gpr_log(GPR_INFO, "Created event fd: %d", efd);
+  epoll_fd = epoll_setup(efd);
+  gpr_log(GPR_INFO, "Created epoll_fd: %d", epoll_fd);
+
+  gpr_thd_options_set_joinable(&options);
+  for (i = 0; i < NUM_THREADS; i++) {
+    thd_args[i].thread_num = i;
+    thd_args[i].epoll_fd = epoll_fd;
+    gpr_log(GPR_INFO, "Starting thread: %d", i);
+    gpr_thd_new(&thd_args[i].id, thread_main, &thd_args[i], &options);
+  }
+
+  sleep((unsigned)g_timeout_secs * 2);
+
+  /* Send signals first */
+  for (i = 0; i < NUM_THREADS; i++) {
+    gpr_log(GPR_INFO, "Sending signal to thread: %d", thd_args->thread_num);
+    pthread_kill(thd_args[i].id, g_signal_num);
+    gpr_log(GPR_INFO, "Sent signal to thread: %d >>>>>> ",
+            thd_args->thread_num);
+  }
+
+  sleep((unsigned)g_timeout_secs * 2);
+
+  close_fd(epoll_fd);
+
+  sleep((unsigned)g_timeout_secs * 2);
+
+  eventfd_wakeup(efd);
+  epoll_teardown(epoll_fd, efd);
+
+  for (i = 0; i < NUM_THREADS; i++) {
+    gpr_thd_join(thd_args[i].id);
+    gpr_log(GPR_INFO, "Thread: %d joined", i);
+  }
+
+  return 0;
+}
diff --git a/test/core/network_benchmarks/low_level_ping_pong.c b/test/core/network_benchmarks/low_level_ping_pong.c
index 1b40895a719..b72a07778e0 100644
--- a/test/core/network_benchmarks/low_level_ping_pong.c
+++ b/test/core/network_benchmarks/low_level_ping_pong.c
@@ -44,6 +44,7 @@
 #include <poll.h>
 #include <stdio.h>
 #include <string.h>
+#include <signal.h>
 #ifdef __linux__
 #include <sys/epoll.h>
 #endif
@@ -84,6 +85,7 @@ typedef struct thread_args {
 static int read_bytes(int fd, char *buf, size_t read_size, int spin) {
   size_t bytes_read = 0;
   ssize_t err;
+
   do {
     err = read(fd, buf + bytes_read, read_size - bytes_read);
     if (err < 0) {
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index 97cc55db36e..85b71a8255a 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -301,6 +301,22 @@
     "third_party": false, 
     "type": "target"
   }, 
+  {
+    "deps": [
+      "gpr", 
+      "gpr_test_util", 
+      "grpc", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "language": "c", 
+    "name": "epoll_test", 
+    "src": [
+      "test/core/network_benchmarks/epoll_test.c"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
   {
     "deps": [
       "gpr", 
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index 850f9474aec..be7b72f61d2 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -356,6 +356,21 @@
       "windows"
     ]
   }, 
+  {
+    "args": [], 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "gtest": false, 
+    "language": "c", 
+    "name": "epoll_test", 
+    "platforms": [
+      "linux"
+    ]
+  }, 
   {
     "args": [], 
     "ci_platforms": [

From 9b9708a9c484c02ad8ef27060370ae605a83942c Mon Sep 17 00:00:00 2001
From: murgatroid99 <mlumish@google.com>
Date: Wed, 1 Jun 2016 11:42:20 -0700
Subject: [PATCH 027/280] Allow Node users to set a custom logger and log
 verbosity. Defaults to existing core logger

---
 src/node/ext/node_grpc.cc   | 117 ++++++++++++++++++++++++++++++++++++
 src/node/index.js           |  33 ++++++++++
 src/node/src/common.js      |  21 +++++++
 src/node/src/credentials.js |   4 +-
 4 files changed, 174 insertions(+), 1 deletion(-)

diff --git a/src/node/ext/node_grpc.cc b/src/node/ext/node_grpc.cc
index 6b6e42737b5..45762cad2e6 100644
--- a/src/node/ext/node_grpc.cc
+++ b/src/node/ext/node_grpc.cc
@@ -31,12 +31,15 @@
  *
  */
 
+#include <list>
+
 #include <node.h>
 #include <nan.h>
 #include <v8.h>
 #include "grpc/grpc.h"
 #include "grpc/grpc_security.h"
 #include "grpc/support/alloc.h"
+#include "grpc/support/log.h"
 
 #include "call.h"
 #include "call_credentials.h"
@@ -49,10 +52,22 @@
 using v8::FunctionTemplate;
 using v8::Local;
 using v8::Value;
+using v8::Number;
 using v8::Object;
 using v8::Uint32;
 using v8::String;
 
+typedef struct logger_state {
+  Nan::Callback *callback;
+  std::list<gpr_log_func_args *> *pending_args;
+  uv_mutex_t mutex;
+  uv_async_t async;
+  // Indicates that a logger has been set
+  bool logger_set;
+} logger_state;
+
+logger_state grpc_logger_state;
+
 static char *pem_root_certs = NULL;
 
 void InitStatusConstants(Local<Object> exports) {
@@ -235,6 +250,18 @@ void InitWriteFlags(Local<Object> exports) {
   Nan::Set(write_flags, Nan::New("NO_COMPRESS").ToLocalChecked(), NO_COMPRESS);
 }
 
+void InitLogConstants(Local<Object> exports) {
+  Nan::HandleScope scope;
+  Local<Object> log_verbosity = Nan::New<Object>();
+  Nan::Set(exports, Nan::New("logVerbosity").ToLocalChecked(), log_verbosity);
+  Local<Value> DEBUG(Nan::New<Uint32, uint32_t>(GPR_LOG_SEVERITY_DEBUG));
+  Nan::Set(log_verbosity, Nan::New("DEBUG").ToLocalChecked(), DEBUG);
+  Local<Value> INFO(Nan::New<Uint32, uint32_t>(GPR_LOG_SEVERITY_INFO));
+  Nan::Set(log_verbosity, Nan::New("INFO").ToLocalChecked(), INFO);
+  Local<Value> ERROR(Nan::New<Uint32, uint32_t>(GPR_LOG_SEVERITY_ERROR));
+  Nan::Set(log_verbosity, Nan::New("ERROR").ToLocalChecked(), ERROR);
+}
+
 NAN_METHOD(MetadataKeyIsLegal) {
   if (!info[0]->IsString()) {
     return Nan::ThrowTypeError(
@@ -298,16 +325,98 @@ NAN_METHOD(SetDefaultRootsPem) {
   }
 }
 
+NAUV_WORK_CB(LogMessagesCallback) {
+  Nan::HandleScope scope;
+  std::list<gpr_log_func_args *> args;
+  uv_mutex_lock(&grpc_logger_state.mutex);
+  args.splice(args.begin(), *grpc_logger_state.pending_args);
+  uv_mutex_unlock(&grpc_logger_state.mutex);
+  /* Call the callback with each log message */
+  while (!args.empty()) {
+    gpr_log_func_args *arg = args.front();
+    args.pop_front();
+    Local<Value> file = Nan::New(arg->file).ToLocalChecked();
+    Local<Value> line = Nan::New<Uint32, uint32_t>(arg->line);
+    Local<Value> severity = Nan::New(
+        gpr_log_severity_string(arg->severity)).ToLocalChecked();
+    Local<Value> message = Nan::New(arg->message).ToLocalChecked();
+    const int argc = 4;
+    Local<Value> argv[argc] = {file, line, severity, message};
+    grpc_logger_state.callback->Call(argc, argv);
+    delete[] arg->message;
+    delete arg;
+  }
+}
+
+void node_log_func(gpr_log_func_args *args) {
+  // TODO(mlumish): Use the core's log formatter when it becomes available
+  gpr_log_func_args *args_copy = new gpr_log_func_args;
+  size_t message_len = strlen(args->message) + 1;
+  char *message = new char[message_len];
+  memcpy(message, args->message, message_len);
+  memcpy(args_copy, args, sizeof(gpr_log_func_args));
+  args_copy->message = message;
+
+  uv_mutex_lock(&grpc_logger_state.mutex);
+  grpc_logger_state.pending_args->push_back(args_copy);
+  uv_mutex_unlock(&grpc_logger_state.mutex);
+
+  uv_async_send(&grpc_logger_state.async);
+}
+
+void init_logger() {
+  memset(&grpc_logger_state, 0, sizeof(logger_state));
+  grpc_logger_state.pending_args = new std::list<gpr_log_func_args *>();
+  uv_mutex_init(&grpc_logger_state.mutex);
+  uv_async_init(uv_default_loop(),
+                &grpc_logger_state.async,
+                LogMessagesCallback);
+  uv_unref((uv_handle_t*)&grpc_logger_state.async);
+  grpc_logger_state.logger_set = false;
+
+  gpr_log_verbosity_init();
+}
+
+/* This registers a JavaScript logger for messages from the gRPC core. Because
+   that handler has to be run in the context of the JavaScript event loop, it
+   will be run asynchronously. To minimize the problems that could cause for
+   debugging, we leave core to do its default synchronous logging until a
+   JavaScript logger is set */
+NAN_METHOD(SetDefaultLoggerCallback) {
+  if (!info[0]->IsFunction()) {
+    return Nan::ThrowTypeError(
+        "setDefaultLoggerCallback's argument must be a function");
+  }
+  if (!grpc_logger_state.logger_set) {
+    gpr_set_log_function(node_log_func);
+    grpc_logger_state.logger_set = true;
+  }
+  grpc_logger_state.callback = new Nan::Callback(info[0].As<v8::Function>());
+}
+
+NAN_METHOD(SetLogVerbosity) {
+  if (!info[0]->IsUint32()) {
+    return Nan::ThrowTypeError(
+        "setLogVerbosity's argument must be a number");
+  }
+  gpr_log_severity severity = static_cast<gpr_log_severity>(
+      Nan::To<uint32_t>(info[0]).FromJust());
+  gpr_set_log_verbosity(severity);
+}
+
 void init(Local<Object> exports) {
   Nan::HandleScope scope;
   grpc_init();
   grpc_set_ssl_roots_override_callback(get_ssl_roots_override);
+  init_logger();
+
   InitStatusConstants(exports);
   InitCallErrorConstants(exports);
   InitOpTypeConstants(exports);
   InitPropagateConstants(exports);
   InitConnectivityStateConstants(exports);
   InitWriteFlags(exports);
+  InitLogConstants(exports);
 
   grpc::node::Call::Init(exports);
   grpc::node::CallCredentials::Init(exports);
@@ -333,6 +442,14 @@ void init(Local<Object> exports) {
            Nan::GetFunction(
                Nan::New<FunctionTemplate>(SetDefaultRootsPem)
                             ).ToLocalChecked());
+  Nan::Set(exports, Nan::New("setDefaultLoggerCallback").ToLocalChecked(),
+           Nan::GetFunction(
+               Nan::New<FunctionTemplate>(SetDefaultLoggerCallback)
+                            ).ToLocalChecked());
+  Nan::Set(exports, Nan::New("setLogVerbosity").ToLocalChecked(),
+           Nan::GetFunction(
+               Nan::New<FunctionTemplate>(SetLogVerbosity)
+                            ).ToLocalChecked());
 }
 
 NODE_MODULE(grpc_node, init)
diff --git a/src/node/index.js b/src/node/index.js
index 66664d94b5a..b85cec68414 100644
--- a/src/node/index.js
+++ b/src/node/index.js
@@ -46,6 +46,8 @@ var client = require('./src/client.js');
 
 var server = require('./src/server.js');
 
+var common = require('./src/common.js');
+
 var Metadata = require('./src/metadata.js');
 
 var grpc = require('./src/grpc_extension');
@@ -122,6 +124,32 @@ exports.load = function load(filename, format, options) {
   return loadObject(builder.ns, options);
 };
 
+/**
+ * Sets the logger function for the gRPC module. For debugging purposes, the C
+ * core will log synchronously directly to stdout unless this function is
+ * called. Note: the output format here is intended to be informational, and
+ * is not guaranteed to stay the same in the future.
+ * Logs will be directed to logger.error.
+ * @param {Console} logger A Console-like object.
+ */
+exports.setLogger = function setLogger(logger) {
+  common.logger = logger;
+  grpc.setDefaultLoggerCallback(function(file, line, severity, message) {
+    file = path.basename(file);
+    logger.error(severity + '\t' + file + ':' + line + ']\t' + message);
+  });
+};
+
+/**
+ * Sets the logger verbosity for gRPC module logging. The options are members
+ * of the grpc.logVerbosity map.
+ * @param {Number} verbosity The minimum severity to log
+ */
+exports.setLogVerbosity = function setLogVerbosity(verbosity) {
+  common.logVerbosity = verbosity;
+  grpc.setLogVerbosity(verbosity);
+};
+
 /**
  * @see module:src/server.Server
  */
@@ -152,6 +180,11 @@ exports.callError = grpc.callError;
  */
 exports.writeFlags = grpc.writeFlags;
 
+/**
+ * Log verbosity setting name to code number mapping
+ */
+exports.logVerbosity = grpc.logVerbosity;
+
 /**
  * Credentials factories
  */
diff --git a/src/node/src/common.js b/src/node/src/common.js
index 8cf43b7a84c..e2d1a50df4a 100644
--- a/src/node/src/common.js
+++ b/src/node/src/common.js
@@ -157,3 +157,24 @@ exports.getProtobufServiceAttrs = function getProtobufServiceAttrs(service,
     }];
   }));
 };
+
+/**
+ * The logger object for the gRPC module. Defaults to console.
+ */
+exports.logger = console;
+
+/**
+ * The current logging verbosity. UNSET corresponds to logging everything
+ */
+exports.logVerbosity = -1;
+
+/**
+ * Log a message if the severity is at least as high as the current verbosity
+ * @param {Number} severity A value of the grpc.logVerbosity map
+ * @param {String} message The message to log
+ */
+exports.log = function log(severity, message) {
+  if (severity >= exports.logVerbosity) {
+    exports.logger.error(message);
+  }
+};
diff --git a/src/node/src/credentials.js b/src/node/src/credentials.js
index a12eade4e1f..b746d0625df 100644
--- a/src/node/src/credentials.js
+++ b/src/node/src/credentials.js
@@ -69,6 +69,8 @@ var ChannelCredentials = grpc.ChannelCredentials;
 
 var Metadata = require('./metadata.js');
 
+var common = require('./common.js');
+
 /**
  * Create an SSL Credentials object. If using a client-side certificate, both
  * the second and third arguments must be passed.
@@ -120,7 +122,7 @@ exports.createFromGoogleCredential = function(google_credential) {
     var service_url = auth_context.service_url;
     google_credential.getRequestMetadata(service_url, function(err, header) {
       if (err) {
-        console.log('Auth error:', err);
+        common.log(grpc.logVerbosity.INFO, 'Auth error:' + err);
         callback(err);
         return;
       }

From 4a43fe4a2fc62ab179e6fff7ca10f2c9c13dd1fc Mon Sep 17 00:00:00 2001
From: murgatroid99 <mlumish@google.com>
Date: Wed, 1 Jun 2016 16:05:48 -0700
Subject: [PATCH 028/280] Minor change to common.js

---
 src/node/src/common.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/node/src/common.js b/src/node/src/common.js
index e2d1a50df4a..22159dd39f7 100644
--- a/src/node/src/common.js
+++ b/src/node/src/common.js
@@ -164,9 +164,9 @@ exports.getProtobufServiceAttrs = function getProtobufServiceAttrs(service,
 exports.logger = console;
 
 /**
- * The current logging verbosity. UNSET corresponds to logging everything
+ * The current logging verbosity. 0 corresponds to logging everything
  */
-exports.logVerbosity = -1;
+exports.logVerbosity = 0;
 
 /**
  * Log a message if the severity is at least as high as the current verbosity

From 1d2f28913e93481cc4b425c608dc7c59ebe026e4 Mon Sep 17 00:00:00 2001
From: murgatroid99 <mlumish@google.com>
Date: Thu, 2 Jun 2016 14:33:22 -0700
Subject: [PATCH 029/280] Add timestamps to custom log output

---
 src/node/ext/node_grpc.cc | 38 ++++++++++++++++++++++++--------------
 src/node/index.js         | 16 +++++++++++++---
 2 files changed, 37 insertions(+), 17 deletions(-)

diff --git a/src/node/ext/node_grpc.cc b/src/node/ext/node_grpc.cc
index 45762cad2e6..6daa1039342 100644
--- a/src/node/ext/node_grpc.cc
+++ b/src/node/ext/node_grpc.cc
@@ -40,6 +40,7 @@
 #include "grpc/grpc_security.h"
 #include "grpc/support/alloc.h"
 #include "grpc/support/log.h"
+#include "grpc/support/time.h"
 
 #include "call.h"
 #include "call_credentials.h"
@@ -48,6 +49,7 @@
 #include "server.h"
 #include "completion_queue_async_worker.h"
 #include "server_credentials.h"
+#include "timeval.h"
 
 using v8::FunctionTemplate;
 using v8::Local;
@@ -57,9 +59,14 @@ using v8::Object;
 using v8::Uint32;
 using v8::String;
 
+typedef struct log_args {
+  gpr_log_func_args core_args;
+  gpr_timespec timestamp;
+} log_args;
+
 typedef struct logger_state {
   Nan::Callback *callback;
-  std::list<gpr_log_func_args *> *pending_args;
+  std::list<log_args *> *pending_args;
   uv_mutex_t mutex;
   uv_async_t async;
   // Indicates that a logger has been set
@@ -327,35 +334,38 @@ NAN_METHOD(SetDefaultRootsPem) {
 
 NAUV_WORK_CB(LogMessagesCallback) {
   Nan::HandleScope scope;
-  std::list<gpr_log_func_args *> args;
+  std::list<log_args *> args;
   uv_mutex_lock(&grpc_logger_state.mutex);
   args.splice(args.begin(), *grpc_logger_state.pending_args);
   uv_mutex_unlock(&grpc_logger_state.mutex);
   /* Call the callback with each log message */
   while (!args.empty()) {
-    gpr_log_func_args *arg = args.front();
+    log_args *arg = args.front();
     args.pop_front();
-    Local<Value> file = Nan::New(arg->file).ToLocalChecked();
-    Local<Value> line = Nan::New<Uint32, uint32_t>(arg->line);
+    Local<Value> file = Nan::New(arg->core_args.file).ToLocalChecked();
+    Local<Value> line = Nan::New<Uint32, uint32_t>(arg->core_args.line);
     Local<Value> severity = Nan::New(
-        gpr_log_severity_string(arg->severity)).ToLocalChecked();
-    Local<Value> message = Nan::New(arg->message).ToLocalChecked();
-    const int argc = 4;
-    Local<Value> argv[argc] = {file, line, severity, message};
+        gpr_log_severity_string(arg->core_args.severity)).ToLocalChecked();
+    Local<Value> message = Nan::New(arg->core_args.message).ToLocalChecked();
+    Local<Value> timestamp = Nan::New<v8::Date>(
+        grpc::node::TimespecToMilliseconds(arg->timestamp)).ToLocalChecked();
+    const int argc = 5;
+    Local<Value> argv[argc] = {file, line, severity, message, timestamp};
     grpc_logger_state.callback->Call(argc, argv);
-    delete[] arg->message;
+    delete[] arg->core_args.message;
     delete arg;
   }
 }
 
 void node_log_func(gpr_log_func_args *args) {
   // TODO(mlumish): Use the core's log formatter when it becomes available
-  gpr_log_func_args *args_copy = new gpr_log_func_args;
+  log_args *args_copy = new log_args;
   size_t message_len = strlen(args->message) + 1;
   char *message = new char[message_len];
   memcpy(message, args->message, message_len);
-  memcpy(args_copy, args, sizeof(gpr_log_func_args));
-  args_copy->message = message;
+  memcpy(&args_copy->core_args, args, sizeof(gpr_log_func_args));
+  args_copy->core_args.message = message;
+  args_copy->timestamp = gpr_now(GPR_CLOCK_REALTIME);
 
   uv_mutex_lock(&grpc_logger_state.mutex);
   grpc_logger_state.pending_args->push_back(args_copy);
@@ -366,7 +376,7 @@ void node_log_func(gpr_log_func_args *args) {
 
 void init_logger() {
   memset(&grpc_logger_state, 0, sizeof(logger_state));
-  grpc_logger_state.pending_args = new std::list<gpr_log_func_args *>();
+  grpc_logger_state.pending_args = new std::list<log_args *>();
   uv_mutex_init(&grpc_logger_state.mutex);
   uv_async_init(uv_default_loop(),
                 &grpc_logger_state.async,
diff --git a/src/node/index.js b/src/node/index.js
index b85cec68414..9fb6faa5d7c 100644
--- a/src/node/index.js
+++ b/src/node/index.js
@@ -124,6 +124,10 @@ exports.load = function load(filename, format, options) {
   return loadObject(builder.ns, options);
 };
 
+var log_template = _.template(
+    '{severity} {timestamp}\t{file}:{line}]\t{message}',
+    {interpolate: /{([\s\S]+?)}/g});
+
 /**
  * Sets the logger function for the gRPC module. For debugging purposes, the C
  * core will log synchronously directly to stdout unless this function is
@@ -134,9 +138,15 @@ exports.load = function load(filename, format, options) {
  */
 exports.setLogger = function setLogger(logger) {
   common.logger = logger;
-  grpc.setDefaultLoggerCallback(function(file, line, severity, message) {
-    file = path.basename(file);
-    logger.error(severity + '\t' + file + ':' + line + ']\t' + message);
+  grpc.setDefaultLoggerCallback(function(file, line, severity,
+                                         message, timestamp) {
+    logger.error(log_template({
+      file: path.basename(file),
+      line: line,
+      severity: severity,
+      message: message,
+      timestamp: timestamp.toISOString()
+    }));
   });
 };
 

From 0bcbd79baa57c16d4ab64a070b5fbfc93293f543 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Wed, 1 Jun 2016 15:43:03 -0700
Subject: [PATCH 030/280] Functionality complete in ev_epoll_linux.c

---
 src/core/lib/iomgr/ev_epoll_linux.c | 1202 +++++++++++++--------------
 1 file changed, 591 insertions(+), 611 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 1201c10a7e0..ce42a9e7ce6 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -61,31 +61,27 @@
 struct polling_island;
 
 /*******************************************************************************
- * FD declarations
+ * Fd Declarations
  */
-
 struct grpc_fd {
   int fd;
   /* refst format:
        bit 0    : 1=Active / 0=Orphaned
        bits 1-n : refcount
-     - ref/unref by two to avoid altering the orphaned bit
-     - To orphan, unref by 1 */
+     Ref/Unref by two to avoid altering the orphaned bit */
   gpr_atm refst;
 
   gpr_mu mu;
-  int shutdown;
+  bool shutdown;
   int closed;
-  int released;
+  bool released;
 
   grpc_closure *read_closure;
   grpc_closure *write_closure;
 
-  /* Mutex protecting the 'polling_island' field */
+  /* The polling island to which this fd belongs to and the mutex protecting the
+     the field */
   gpr_mu pi_mu;
-
-  /* The polling island to which this fd belongs to.
-   * An fd belongs to exactly one polling island */
   struct polling_island *polling_island;
 
   struct grpc_fd *freelist_next;
@@ -94,11 +90,7 @@ struct grpc_fd {
   grpc_iomgr_object iomgr_object;
 };
 
-/* Return 1 if this fd is orphaned, 0 otherwise */
-static bool fd_is_orphaned(grpc_fd *fd);
-
 /* Reference counting for fds */
-/*#define GRPC_FD_REF_COUNT_DEBUG*/
 #ifdef GRPC_FD_REF_COUNT_DEBUG
 static void fd_ref(grpc_fd *fd, const char *reason, const char *file, int line);
 static void fd_unref(grpc_fd *fd, const char *reason, const char *file,
@@ -119,15 +111,15 @@ static void fd_global_shutdown(void);
 #define CLOSURE_READY ((grpc_closure *)1)
 
 /*******************************************************************************
- * Polling Island
+ * Polling-island Declarations
  */
 typedef struct polling_island {
   gpr_mu mu;
   int ref_cnt;
 
-  /* Pointer to the polling_island this merged into. If this is not NULL, all
-     the remaining fields in this pollset (i.e all fields except mu and ref_cnt)
-     are considered invalid and must be ignored */
+  /* Points to the polling_island this merged into.
+   * If merged_to is not NULL, all the remaining fields (except mu and ref_cnt)
+   * are invalid and must be ignored */
   struct polling_island *merged_to;
 
   /* The fd of the underlying epoll set */
@@ -144,15 +136,62 @@ typedef struct polling_island {
   struct polling_island *next_free;
 } polling_island;
 
+/*******************************************************************************
+ * Pollset Declarations
+ */
+
+struct grpc_pollset_worker {
+  int kicked_specifically;
+  pthread_t pt_id; /* TODO (sreek) - Add an abstraction here */
+  struct grpc_pollset_worker *next;
+  struct grpc_pollset_worker *prev;
+};
+
+struct grpc_pollset {
+  gpr_mu mu;
+  grpc_pollset_worker root_worker;
+  bool kicked_without_pollers;
+
+  bool shutting_down;          /* Is the pollset shutting down ? */
+  bool finish_shutdown_called; /* Is the 'finish_shutdown_locked()' called ? */
+  grpc_closure *shutdown_done; /* Called after after shutdown is complete */
+
+  /* The polling island to which this pollset belongs to and the mutex
+     protecting the field */
+  gpr_mu pi_mu;
+  struct polling_island *polling_island;
+};
+
+/*******************************************************************************
+ * Pollset-set Declarations
+ */
+struct grpc_pollset_set {
+  gpr_mu mu;
+
+  size_t pollset_count;
+  size_t pollset_capacity;
+  grpc_pollset **pollsets;
+
+  size_t pollset_set_count;
+  size_t pollset_set_capacity;
+  struct grpc_pollset_set **pollset_sets;
+
+  size_t fd_count;
+  size_t fd_capacity;
+  grpc_fd **fds;
+};
+
+/*******************************************************************************
+ * Polling-island Definitions
+ */
+
 /* Polling island freelist */
 static gpr_mu g_pi_freelist_mu;
 static polling_island *g_pi_freelist = NULL;
 
-/* TODO: sreek - Should we hold a lock on fd or add a ref to the fd ?
- * TODO: sreek - Should this add a ref to the grpc_fd ? */
 /* The caller is expected to hold pi->mu lock before calling this function */
 static void polling_island_add_fds_locked(polling_island *pi, grpc_fd **fds,
-                                          size_t fd_count) {
+                                          size_t fd_count, bool add_fd_refs) {
   int err;
   size_t i;
   struct epoll_event ev;
@@ -162,11 +201,14 @@ static void polling_island_add_fds_locked(polling_island *pi, grpc_fd **fds,
     ev.data.ptr = fds[i];
     err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_ADD, fds[i]->fd, &ev);
 
-    if (err < 0 && errno != EEXIST) {
-      gpr_log(GPR_ERROR, "epoll_ctl add for fd: %d failed with error: %s",
-              fds[i]->fd, strerror(errno));
-      /* TODO: sreek - Not sure if it is a good idea to continue here. We need a
-       * better way to bubble up this error instead of doing an abort() */
+    if (err < 0) {
+      if (errno != EEXIST) {
+        /* TODO: sreek - We need a better way to bubble up this error instead of
+           just logging a message */
+        gpr_log(GPR_ERROR, "epoll_ctl add for fd: %d failed with error: %s",
+                fds[i]->fd, strerror(errno));
+      }
+
       continue;
     }
 
@@ -176,26 +218,30 @@ static void polling_island_add_fds_locked(polling_island *pi, grpc_fd **fds,
     }
 
     pi->fds[pi->fd_cnt++] = fds[i];
+    if (add_fd_refs) {
+      GRPC_FD_REF(fds[i], "polling_island");
+    }
   }
 }
 
-/* TODO: sreek - Should we hold a lock on fd or add a ref to the fd ?
- * TODO: sreek - Might have to unref the fds (assuming whether we add a ref to
- * the fd when adding it to the epollset) */
 /* The caller is expected to hold pi->mu lock before calling this function */
-static void polling_island_remove_all_fds_locked(polling_island *pi) {
+static void polling_island_remove_all_fds_locked(polling_island *pi,
+                                                 bool remove_fd_refs) {
   int err;
   size_t i;
 
   for (i = 0; i < pi->fd_cnt; i++) {
-    err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_DEL, pi->fds[i]->fd, NULL);
+    if (remove_fd_refs) {
+      GRPC_FD_UNREF(pi->fds[i], "polling_island");
+    }
 
+    err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_DEL, pi->fds[i]->fd, NULL);
     if (err < 0 && errno != ENOENT) {
       gpr_log(GPR_ERROR,
               "epoll_ctl delete for fds[i]: %d failed with error: %s", i,
               pi->fds[i]->fd, strerror(errno));
-      /* TODO: sreek - Not sure if it is a good idea to continue here. We need a
-       * better way to bubble up this error instead of doing an abort() */
+      /* TODO: sreek - We need a better way to bubble up this error instead of
+       * just logging a message */
       continue;
     }
   }
@@ -203,22 +249,31 @@ static void polling_island_remove_all_fds_locked(polling_island *pi) {
   pi->fd_cnt = 0;
 }
 
-/* TODO: sreek - Should we hold a lock on fd or add a ref to the fd ?
- * TODO: sreek - Might have to unref the fd (assuming whether we add a ref to
- * the fd when adding it to the epollset) */
 /* The caller is expected to hold pi->mu lock before calling this function */
-static void polling_island_remove_fd_locked(polling_island *pi, grpc_fd *fd) {
+static void polling_island_remove_fd_locked(polling_island *pi, grpc_fd *fd,
+                                            bool close_fd, bool remove_fd_ref) {
   int err;
   size_t i;
-  err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_DEL, fd->fd, NULL);
-  if (err < 0 && errno != ENOENT) {
-    gpr_log(GPR_ERROR, "epoll_ctl delete for fd: %d failed with error; %s",
-            fd->fd, strerror(errno));
+
+  /* Calling close() on the fd will automatically remove it from the epoll set.
+     If not calling close(), the fd must be explicitly removed from the epoll
+     set */
+  if (close_fd) {
+    close(fd->fd);
+  } else {
+    err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_DEL, fd->fd, NULL);
+    if (err < 0 && errno != ENOENT) {
+      gpr_log(GPR_ERROR, "epoll_ctl delete for fd: %d failed with error; %s",
+              fd->fd, strerror(errno));
+    }
   }
 
   for (i = 0; i < pi->fd_cnt; i++) {
     if (pi->fds[i] == fd) {
       pi->fds[i] = pi->fds[--pi->fd_cnt];
+      if (remove_fd_ref) {
+        GRPC_FD_UNREF(fd, "polling_island");
+      }
       break;
     }
   }
@@ -227,6 +282,10 @@ static void polling_island_remove_fd_locked(polling_island *pi, grpc_fd *fd) {
 static polling_island *polling_island_create(grpc_fd *initial_fd,
                                              int initial_ref_cnt) {
   polling_island *pi = NULL;
+  struct epoll_event ev;
+  int err;
+
+  /* Try to get one from the polling island freelist */
   gpr_mu_lock(&g_pi_freelist_mu);
   if (g_pi_freelist != NULL) {
     pi = g_pi_freelist;
@@ -242,13 +301,25 @@ static polling_island *polling_island_create(grpc_fd *initial_fd,
     pi->fd_cnt = 0;
     pi->fd_capacity = 0;
     pi->fds = NULL;
+  }
 
-    pi->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
-    if (pi->epoll_fd < 0) {
-      gpr_log(GPR_ERROR, "epoll_create1() failed with error: %s",
-              strerror(errno));
-    }
-    GPR_ASSERT(pi->epoll_fd >= 0);
+  pi->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
+  if (pi->epoll_fd < 0) {
+    gpr_log(GPR_ERROR, "epoll_create1() failed with error: %s",
+            strerror(errno));
+  }
+  GPR_ASSERT(pi->epoll_fd >= 0);
+
+  ev.events = (uint32_t)(EPOLLIN | EPOLLET);
+  ev.data.ptr = NULL;
+  err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_ADD,
+                  GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd), &ev);
+  if (err < 0) {
+    gpr_log(GPR_ERROR,
+            "Failed to add grpc_global_wake_up_fd (%d) to the epoll set "
+            "(epoll_fd: %d) with error: %s",
+            GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd), pi->epoll_fd,
+            strerror(errno));
   }
 
   pi->ref_cnt = initial_ref_cnt;
@@ -256,10 +327,12 @@ static polling_island *polling_island_create(grpc_fd *initial_fd,
   pi->next_free = NULL;
 
   if (initial_fd != NULL) {
-    /* polling_island_add_fds_locked() expects the caller to hold a pi->mu
-     * lock. However, since this is a new polling island (and no one has a
-     * reference to it yet), it is okay to not acquire pi->mu here */
-    polling_island_add_fds_locked(pi, &initial_fd, 1);
+    /* It is not really needed to get the pi->mu lock here. If this is a newly
+       created polling island (or one that we got from the freelist), no one
+       else would be holding a lock to it anyway */
+    gpr_mu_lock(&pi->mu);
+    polling_island_add_fds_locked(pi, &initial_fd, 1, true);
+    gpr_mu_unlock(&pi->mu);
   }
 
   return pi;
@@ -269,6 +342,9 @@ static void polling_island_delete(polling_island *pi) {
   GPR_ASSERT(pi->ref_cnt == 0);
   GPR_ASSERT(pi->fd_cnt == 0);
 
+  close(pi->epoll_fd);
+  pi->epoll_fd = -1;
+
   pi->merged_to = NULL;
 
   gpr_mu_lock(&g_pi_freelist_mu);
@@ -313,10 +389,20 @@ void polling_island_pair_update_and_lock(polling_island **p,
   bool pi_2_locked = false;
   int num_swaps = 0;
 
+  /* Loop until either pi_1 == pi_2 or until we acquired locks on both pi_1
+     and pi_2 */
   while (pi_1 != pi_2 && !(pi_1_locked && pi_2_locked)) {
-    // pi_1 is NOT equal to pi_2
-    // pi_1 MAY be locked
-
+    /* The following assertions are true at this point:
+       - pi_1 != pi_2  (else, the while loop would have exited)
+       - pi_1 MAY be locked
+       - pi_2 is NOT locked */
+
+    /* To maintain lock order consistency, always lock polling_island node with
+       lower address first.
+       First, make sure pi_1 < pi_2 before proceeding any further. If it turns
+       out that pi_1 > pi_2, unlock pi_1 if locked (because pi_2 is not locked
+       at this point and having pi_1 locked would violate the lock order) and
+       swap pi_1 and pi_2 so that pi_1 becomes less than pi_2 */
     if (pi_1 > pi_2) {
       if (pi_1_locked) {
         gpr_mu_unlock(&pi_1->mu);
@@ -327,14 +413,22 @@ void polling_island_pair_update_and_lock(polling_island **p,
       num_swaps++;
     }
 
-    // p1 < p2
-    // p1 MAY BE locked
-    // p2 is NOT locked
+    /* The following assertions are true at this point:
+       - pi_1 != pi_2
+       - pi_1 < pi_2  (address of pi_1 is less than that of pi_2)
+       - pi_1 MAYBE locked
+       - pi_2 is NOT locked */
 
+    /* Lock pi_1 (if pi_1 is pointing to the terminal node in the list) */
     if (!pi_1_locked) {
       gpr_mu_lock(&pi_1->mu);
       pi_1_locked = true;
 
+      /* If pi_1 is not terminal node (i.e pi_1->merged_to != NULL), we are not
+         done locking this polling_island yet. Release the lock on this node and
+         advance pi_1 to the next node in the list; and go to the beginning of
+         the loop (we can't proceed to locking pi_2 unless we locked pi_1 first)
+         */
       if (pi_1->merged_to != NULL) {
         temp = pi_1->merged_to;
         polling_island_unref_and_unlock(pi_1, 1);
@@ -345,13 +439,16 @@ void polling_island_pair_update_and_lock(polling_island **p,
       }
     }
 
-    // p1 is LOCKED
-    // p2 is UNLOCKED
-    // p1 != p2
+    /* The following assertions are true at this point:
+       - pi_1 is locked
+       - pi_2 is unlocked
+       - pi_1 != pi_2 */
 
     gpr_mu_lock(&pi_2->mu);
     pi_2_locked = true;
 
+    /* If pi_2 is not terminal node, we are not done locking this polling_island
+       yet. Release the lock and update pi_2 to the next node in the list */
     if (pi_2->merged_to != NULL) {
       temp = pi_2->merged_to;
       polling_island_unref_and_unlock(pi_2, 1);
@@ -360,14 +457,19 @@ void polling_island_pair_update_and_lock(polling_island **p,
     }
   }
 
-  // Either pi_1 == pi_2 OR we got both locks!
+  /* At this point, either pi_1 == pi_2 AND/OR we got both locks */
   if (pi_1 == pi_2) {
+    /* We may or may not have gotten the lock. If we didn't, walk the rest of
+      the polling_island list and get the lock */
     GPR_ASSERT(pi_1_locked || (!pi_1_locked && !pi_2_locked));
     if (!pi_1_locked) {
       pi_1 = pi_2 = polling_island_update_and_lock(pi_1, 2, 0);
     }
   } else {
     GPR_ASSERT(pi_1_locked && pi_2_locked);
+    /* If we swapped pi_1 and pi_2 odd number of times, do one more swap so that
+       pi_1 and pi_2 point to the same polling_island lists they started off
+       with at the beginning of this function (i.e *p and *q respectively) */
     if (num_swaps % 2 > 0) {
       GPR_SWAP(polling_island *, pi_1, pi_2);
     }
@@ -378,26 +480,37 @@ void polling_island_pair_update_and_lock(polling_island **p,
 }
 
 polling_island *polling_island_merge(polling_island *p, polling_island *q) {
-  polling_island *merged = NULL;
-
+  /* Get locks on both the polling islands */
   polling_island_pair_update_and_lock(&p, &q);
 
   /* TODO: sreek: Think about this scenario some more. Is it possible ?. what
    * does it mean, when would this happen  */
   if (p == q) {
-    merged = p;
+    /* Nothing needs to be done here */
+    gpr_mu_unlock(&p->mu);
+    return p;
   }
 
-  // Move all the fds from polling_island p to polling_island q
-  polling_island_add_fds_locked(q, p->fds, p->fd_cnt);
-  polling_island_remove_all_fds_locked(p);
+  /* Make sure that p points to the polling island with fewer fds than q */
+  if (p->fd_cnt > q->fd_cnt) {
+    GPR_SWAP(polling_island *, p, q);
+  }
+
+  /* "Merge" p with q i.e move all the fds from p (the polling_island with fewer
+     fds) to q.
+     Note: Not altering the ref counts on the affected fds here because they
+     would effectively remain unchanged */
+  polling_island_add_fds_locked(q, p->fds, p->fd_cnt, false);
+  polling_island_remove_all_fds_locked(p, false);
 
+  /* The merged polling island inherits all the ref counts of the island merging
+     with it */
   q->ref_cnt += p->ref_cnt;
 
   gpr_mu_unlock(&p->mu);
   gpr_mu_unlock(&q->mu);
 
-  return merged;
+  return q;
 }
 
 static void polling_island_global_init() {
@@ -406,95 +519,10 @@ static void polling_island_global_init() {
 }
 
 /*******************************************************************************
- * pollset declarations
- */
-
-struct grpc_pollset_worker {
-  int kicked_specifically;
-  pthread_t pt_id;
-  struct grpc_pollset_worker *next;
-  struct grpc_pollset_worker *prev;
-};
-
-struct grpc_pollset {
-  gpr_mu mu;
-  grpc_pollset_worker root_worker;
-  int shutting_down;
-  int called_shutdown;
-  int kicked_without_pollers;
-  grpc_closure *shutdown_done;
-
-  int epoll_fd;
-
-  /* Mutex protecting the 'polling_island' field */
-  gpr_mu pi_mu;
-
-  /* The polling island to which this fd belongs to. An fd belongs to exactly
-     one polling island */
-  struct polling_island *polling_island;
-};
-
-/* Add an fd to a pollset */
-static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                           struct grpc_fd *fd);
-
-static void pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
-                               grpc_pollset_set *pollset_set, grpc_fd *fd);
-
-/* Convert a timespec to milliseconds:
-   - very small or negative poll times are clamped to zero to do a
-     non-blocking poll (which becomes spin polling)
-   - other small values are rounded up to one millisecond
-   - longer than a millisecond polls are rounded up to the next nearest
-     millisecond to avoid spinning
-   - infinite timeouts are converted to -1 */
-static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
-                                           gpr_timespec now);
-
-/* Allow kick to wakeup the currently polling worker */
-#define GRPC_POLLSET_CAN_KICK_SELF 1
-/* As per pollset_kick, with an extended set of flags (defined above)
-   -- mostly for fd_posix's use. */
-static void pollset_kick_ext(grpc_pollset *p,
-                             grpc_pollset_worker *specific_worker,
-                             uint32_t flags);
-
-/* turn a pollset into a multipoller: platform specific */
-typedef void (*platform_become_multipoller_type)(grpc_exec_ctx *exec_ctx,
-                                                 grpc_pollset *pollset,
-                                                 struct grpc_fd **fds,
-                                                 size_t fd_count);
-
-/* Return 1 if the pollset has active threads in pollset_work (pollset must
- * be locked) */
-static int pollset_has_workers(grpc_pollset *pollset);
-
-/*******************************************************************************
- * pollset_set definitions
- */
-
-struct grpc_pollset_set {
-  gpr_mu mu;
-
-  size_t pollset_count;
-  size_t pollset_capacity;
-  grpc_pollset **pollsets;
-
-  size_t pollset_set_count;
-  size_t pollset_set_capacity;
-  struct grpc_pollset_set **pollset_sets;
-
-  size_t fd_count;
-  size_t fd_capacity;
-  grpc_fd **fds;
-};
-
-/*******************************************************************************
- * fd_posix.c
+ * Fd Definitions
  */
 
-/* We need to keep a freelist not because of any concerns of malloc
- * performance
+/* We need to keep a freelist not because of any concerns of malloc performance
  * but instead so that implementations with multiple threads in (for example)
  * epoll_wait deal with the race between pollset removal and incoming poll
  * notifications.
@@ -506,58 +534,16 @@ struct grpc_pollset_set {
  * If we keep the object freelisted, in the worst case losing this race just
  * becomes a spurious read notification on a reused fd.
  */
-/* TODO(klempner): We could use some form of polling generation count to know
- * when these are safe to free. */
-/* TODO(klempner): Consider disabling freelisting if we don't have multiple
- * threads in poll on the same fd */
-/* TODO(klempner): Batch these allocations to reduce fragmentation */
-static grpc_fd *fd_freelist = NULL;
-static gpr_mu fd_freelist_mu;
-
-static void freelist_fd(grpc_fd *fd) {
-  gpr_mu_lock(&fd_freelist_mu);
-  fd->freelist_next = fd_freelist;
-  fd_freelist = fd;
-  grpc_iomgr_unregister_object(&fd->iomgr_object);
-  gpr_mu_unlock(&fd_freelist_mu);
-}
-
-static grpc_fd *alloc_fd(int fd) {
-  grpc_fd *r = NULL;
-
-  gpr_mu_lock(&fd_freelist_mu);
-  if (fd_freelist != NULL) {
-    r = fd_freelist;
-    fd_freelist = fd_freelist->freelist_next;
-  }
-  gpr_mu_unlock(&fd_freelist_mu);
-
-  if (r == NULL) {
-    r = gpr_malloc(sizeof(grpc_fd));
-    gpr_mu_init(&r->mu);
-    gpr_mu_init(&r->pi_mu);
-  }
 
-  /* TODO: sreek - check with ctiller on why we need to acquire a lock here */
-  gpr_mu_lock(&r->mu);
-  gpr_atm_rel_store(&r->refst, 1);
-  r->shutdown = 0;
-  r->read_closure = CLOSURE_NOT_READY;
-  r->write_closure = CLOSURE_NOT_READY;
-  r->fd = fd;
-  r->polling_island = NULL;
-  r->freelist_next = NULL;
-  r->on_done_closure = NULL;
-  r->closed = 0;
-  r->released = 0;
-  gpr_mu_unlock(&r->mu);
-  return r;
-}
+/* The alarm system needs to be able to wakeup 'some poller' sometimes
+ * (specifically when a new alarm needs to be triggered earlier than the next
+ * alarm 'epoch'). This wakeup_fd gives us something to alert on when such a
+ * case occurs. */
+/* TODO: sreek: Right now, this wakes up all pollers */
+grpc_wakeup_fd grpc_global_wakeup_fd;
 
-static void destroy(grpc_fd *fd) {
-  gpr_mu_destroy(&fd->mu);
-  gpr_free(fd);
-}
+static grpc_fd *fd_freelist = NULL;
+static gpr_mu fd_freelist_mu;
 
 #ifdef GRPC_FD_REF_COUNT_DEBUG
 #define REF_BY(fd, n, reason) ref_by(fd, n, reason, __FILE__, __LINE__)
@@ -588,12 +574,33 @@ static void unref_by(grpc_fd *fd, int n) {
 #endif
   old = gpr_atm_full_fetch_add(&fd->refst, -n);
   if (old == n) {
-    freelist_fd(fd);
+    /* Add the fd to the freelist */
+    gpr_mu_lock(&fd_freelist_mu);
+    fd->freelist_next = fd_freelist;
+    fd_freelist = fd;
+    grpc_iomgr_unregister_object(&fd->iomgr_object);
+    gpr_mu_unlock(&fd_freelist_mu);
   } else {
     GPR_ASSERT(old > n);
   }
 }
 
+/* Increment refcount by two to avoid changing the orphan bit */
+#ifdef GRPC_FD_REF_COUNT_DEBUG
+static void fd_ref(grpc_fd *fd, const char *reason, const char *file,
+                   int line) {
+  ref_by(fd, 2, reason, file, line);
+}
+
+static void fd_unref(grpc_fd *fd, const char *reason, const char *file,
+                     int line) {
+  unref_by(fd, 2, reason, file, line);
+}
+#else
+static void fd_ref(grpc_fd *fd) { ref_by(fd, 2); }
+static void fd_unref(grpc_fd *fd) { unref_by(fd, 2); }
+#endif
+
 static void fd_global_init(void) { gpr_mu_init(&fd_freelist_mu); }
 
 static void fd_global_shutdown(void) {
@@ -602,91 +609,111 @@ static void fd_global_shutdown(void) {
   while (fd_freelist != NULL) {
     grpc_fd *fd = fd_freelist;
     fd_freelist = fd_freelist->freelist_next;
-    destroy(fd);
+    gpr_mu_destroy(&fd->mu);
+    gpr_free(fd);
   }
   gpr_mu_destroy(&fd_freelist_mu);
 }
 
 static grpc_fd *fd_create(int fd, const char *name) {
-  grpc_fd *r = alloc_fd(fd);
+  grpc_fd *new_fd = NULL;
+
+  gpr_mu_lock(&fd_freelist_mu);
+  if (fd_freelist != NULL) {
+    new_fd = fd_freelist;
+    fd_freelist = fd_freelist->freelist_next;
+  }
+  gpr_mu_unlock(&fd_freelist_mu);
+
+  if (new_fd == NULL) {
+    new_fd = gpr_malloc(sizeof(grpc_fd));
+    gpr_mu_init(&new_fd->mu);
+    gpr_mu_init(&new_fd->pi_mu);
+  }
 
-  char *name2;
-  gpr_asprintf(&name2, "%s fd=%d", name, fd);
-  grpc_iomgr_register_object(&r->iomgr_object, name2);
-  gpr_free(name2);
+  /* Note: It is not really needed to get the new_fd->mu lock here. If this is a
+     newly created fd (or an fd we got from the freelist), no one else would be
+     holding a lock to it anyway. */
+  gpr_mu_lock(&new_fd->mu);
+
+  gpr_atm_rel_store(&new_fd->refst, 1);
+  new_fd->shutdown = false;
+  new_fd->read_closure = CLOSURE_NOT_READY;
+  new_fd->write_closure = CLOSURE_NOT_READY;
+  new_fd->fd = fd;
+  new_fd->polling_island = NULL;
+  new_fd->freelist_next = NULL;
+  new_fd->on_done_closure = NULL;
+  new_fd->closed = 0;
+  new_fd->released = false;
+
+  gpr_mu_unlock(&new_fd->mu);
+
+  char *fd_name;
+  gpr_asprintf(&fd_name, "%s fd=%d", name, fd);
+  grpc_iomgr_register_object(&new_fd->iomgr_object, fd_name);
+  gpr_free(fd_name);
 #ifdef GRPC_FD_REF_COUNT_DEBUG
-  gpr_log(GPR_DEBUG, "FD %d %p create %s", fd, r, name);
+  gpr_log(GPR_DEBUG, "FD %d %p create %s", fd, r, fd_name);
 #endif
-  return r;
+  return new_fd;
 }
 
 static bool fd_is_orphaned(grpc_fd *fd) {
   return (gpr_atm_acq_load(&fd->refst) & 1) == 0;
 }
 
-static void close_fd_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
-  fd->closed = 1;
-  if (!fd->released) {
-    close(fd->fd);
-  } else {
-    /* TODO: sreek - Check for deadlocks */
-
-    gpr_mu_lock(&fd->pi_mu);
-    fd->polling_island =
-        polling_island_update_and_lock(fd->polling_island, 1, 0);
-
-    polling_island_remove_fd_locked(fd->polling_island, fd);
-    polling_island_unref_and_unlock(fd->polling_island, 1);
-
-    fd->polling_island = NULL;
-    gpr_mu_unlock(&fd->pi_mu);
-  }
-
-  grpc_exec_ctx_enqueue(exec_ctx, fd->on_done_closure, true, NULL);
-}
-
 static int fd_wrapped_fd(grpc_fd *fd) {
-  if (fd->released || fd->closed) {
-    return -1;
-  } else {
-    return fd->fd;
+  int ret_fd = -1;
+  gpr_mu_lock(&fd->mu);
+  if (!fd->released && !fd->closed) {
+    ret_fd = fd->fd;
   }
+  gpr_mu_unlock(&fd->mu);
+
+  return ret_fd;
 }
 
-/* TODO: sreek - do something here with the pollset island link */
 static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
                       grpc_closure *on_done, int *release_fd,
                       const char *reason) {
+  /* TODO(sreek) In ev_poll_posix.c,the lock is acquired a little later. Why? */
+  gpr_mu_lock(&fd->mu);
   fd->on_done_closure = on_done;
+
+  /* If release_fd is not NULL, we should be relinquishing control of the file
+     descriptor fd->fd (but we still own the grpc_fd structure). */
   fd->released = release_fd != NULL;
   if (!fd->released) {
     shutdown(fd->fd, SHUT_RDWR);
   } else {
     *release_fd = fd->fd;
   }
-  gpr_mu_lock(&fd->mu);
-  REF_BY(fd, 1, reason); /* remove active status, but keep referenced */
-  close_fd_locked(exec_ctx, fd);
-  gpr_mu_unlock(&fd->mu);
-  UNREF_BY(fd, 2, reason); /* drop the reference */
-}
 
-/* increment refcount by two to avoid changing the orphan bit */
-#ifdef GRPC_FD_REF_COUNT_DEBUG
-static void fd_ref(grpc_fd *fd, const char *reason, const char *file,
-                   int line) {
-  ref_by(fd, 2, reason, file, line);
-}
+  REF_BY(fd, 1, reason); /* Remove active status, but keep referenced */
+  fd->closed = 1;
 
-static void fd_unref(grpc_fd *fd, const char *reason, const char *file,
-                     int line) {
-  unref_by(fd, 2, reason, file, line);
-}
-#else
-static void fd_ref(grpc_fd *fd) { ref_by(fd, 2); }
+  /* Remove the fd from the polling island:
+     - Update the fd->polling_island to point to the latest polling island
+     - Remove the fd from the polling island. Also, call close() on the file
+       descriptor fd->fd ONLY if we haven't relinquised control (i.e
+       fd->released is 'false')
+     - Decrement the ref count on the polling island and det fd->polling_island
+       to NULL */
+  gpr_mu_lock(&fd->pi_mu);
 
-static void fd_unref(grpc_fd *fd) { unref_by(fd, 2); }
-#endif
+  fd->polling_island = polling_island_update_and_lock(fd->polling_island, 1, 0);
+  polling_island_remove_fd_locked(fd->polling_island, fd, !fd->released, true);
+  polling_island_unref_and_unlock(fd->polling_island, 1);
+  fd->polling_island = NULL;
+
+  gpr_mu_unlock(&fd->pi_mu);
+
+  grpc_exec_ctx_enqueue(exec_ctx, fd->on_done_closure, true, NULL);
+
+  gpr_mu_unlock(&fd->mu);
+  UNREF_BY(fd, 2, reason); /* Drop the reference */
+}
 
 static void notify_on_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
                              grpc_closure **st, grpc_closure *closure) {
@@ -724,11 +751,13 @@ static int set_ready_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
   }
 }
 
-/* Do something here with the pollset island link (?) */
 static void fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
   gpr_mu_lock(&fd->mu);
   GPR_ASSERT(!fd->shutdown);
-  fd->shutdown = 1;
+  fd->shutdown = true;
+
+  /* Flush any pending read and write closures. Since fd->shutdown is 'true' at
+     this point, the closures would be called with 'success = false' */
   set_ready_locked(exec_ctx, fd, &fd->read_closure);
   set_ready_locked(exec_ctx, fd, &fd->write_closure);
   gpr_mu_unlock(&fd->mu);
@@ -749,27 +778,39 @@ static void fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
 }
 
 /*******************************************************************************
- * pollset_posix.c
+ * Pollset Definitions
  */
 
-GPR_TLS_DECL(g_current_thread_poller);
-GPR_TLS_DECL(g_current_thread_worker);
+static void sig_handler(int sig_num) {
+  /* TODO: sreek - Remove this expensive log line */
+  gpr_log(GPR_INFO, "Received signal %d", sig_num);
+}
 
-/** The alarm system needs to be able to wakeup 'some poller' sometimes
- *  (specifically when a new alarm needs to be triggered earlier than the next
- *  alarm 'epoch').
- *  This wakeup_fd gives us something to alert on when such a case occurs. */
-grpc_wakeup_fd grpc_global_wakeup_fd;
+/* Global state management */
+static void pollset_global_init(void) {
+  gpr_tls_init(&g_current_thread_poller);
+  gpr_tls_init(&g_current_thread_worker);
+  grpc_wakeup_fd_init(&grpc_global_wakeup_fd);
+  signal(SIGUSR1, sig_handler);
+}
 
-static void remove_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
-  worker->prev->next = worker->next;
-  worker->next->prev = worker->prev;
+static void pollset_global_shutdown(void) {
+  grpc_wakeup_fd_destroy(&grpc_global_wakeup_fd);
+  gpr_tls_destroy(&g_current_thread_poller);
+  gpr_tls_destroy(&g_current_thread_worker);
 }
 
+/* Return 1 if the pollset has active threads in pollset_work (pollset must
+ * be locked) */
 static int pollset_has_workers(grpc_pollset *p) {
   return p->root_worker.next != &p->root_worker;
 }
 
+static void remove_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
+  worker->prev->next = worker->next;
+  worker->next->prev = worker->prev;
+}
+
 static grpc_pollset_worker *pop_front_worker(grpc_pollset *p) {
   if (pollset_has_workers(p)) {
     grpc_pollset_worker *w = p->root_worker.next;
@@ -792,241 +833,69 @@ static void push_front_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
   worker->prev->next = worker->next->prev = worker;
 }
 
-static void pollset_kick_ext(grpc_pollset *p,
-                             grpc_pollset_worker *specific_worker,
-                             uint32_t flags) {
-  GPR_TIMER_BEGIN("pollset_kick_ext", 0);
-
-  /* pollset->mu already held */
-  if (specific_worker != NULL) {
-    if (specific_worker == GRPC_POLLSET_KICK_BROADCAST) {
-      GPR_TIMER_BEGIN("pollset_kick_ext.broadcast", 0);
-      for (specific_worker = p->root_worker.next;
-           specific_worker != &p->root_worker;
-           specific_worker = specific_worker->next) {
-        pthread_kill(specific_worker->pt_id, SIGUSR1);
+/* p->mu must be held before calling this function */
+static void pollset_kick(grpc_pollset *p,
+                         grpc_pollset_worker *specific_worker) {
+  GPR_TIMER_BEGIN("pollset_kick", 0);
+
+  grpc_pollset_worker *worker = specific_worker;
+  if (worker != NULL) {
+    if (worker == GRPC_POLLSET_KICK_BROADCAST) {
+      GPR_TIMER_BEGIN("pollset_kick.broadcast", 0);
+      if (pollset_has_workers(p)) {
+        for (worker = p->root_worker.next; worker != &p->root_worker;
+             worker = worker->next) {
+          pthread_kill(worker->pt_id, SIGUSR1);
+        }
+      } else {
+        p->kicked_without_pollers = true;
       }
-      p->kicked_without_pollers = 1;
-      GPR_TIMER_END("pollset_kick_ext.broadcast", 0);
-    } else if (gpr_tls_get(&g_current_thread_worker) !=
-               (intptr_t)specific_worker) {
-      GPR_TIMER_MARK("different_thread_worker", 0);
-      specific_worker->kicked_specifically = 1;
-      /* TODO (sreek): Refactor this into a separate file*/
-      pthread_kill(specific_worker->pt_id, SIGUSR1);
-    } else if ((flags & GRPC_POLLSET_CAN_KICK_SELF) != 0) {
-      GPR_TIMER_MARK("kick_yoself", 0);
-      specific_worker->kicked_specifically = 1;
-      pthread_kill(specific_worker->pt_id, SIGUSR1);
+      GPR_TIMER_END("pollset_kick.broadcast", 0);
+    } else {
+      GPR_TIMER_MARK("kicked_specifically", 0);
+      worker->kicked_specifically = true;
+      pthread_kill(worker->pt_id, SIGUSR1);
     }
-  } else if (gpr_tls_get(&g_current_thread_poller) != (intptr_t)p) {
+  } else {
     GPR_TIMER_MARK("kick_anonymous", 0);
-    specific_worker = pop_front_worker(p);
-    if (specific_worker != NULL) {
-      if (gpr_tls_get(&g_current_thread_worker) == (intptr_t)specific_worker) {
-        GPR_TIMER_MARK("kick_anonymous_not_self", 0);
-        push_back_worker(p, specific_worker);
-        specific_worker = pop_front_worker(p);
-        if ((flags & GRPC_POLLSET_CAN_KICK_SELF) == 0 &&
-            gpr_tls_get(&g_current_thread_worker) ==
-                (intptr_t)specific_worker) {
-          push_back_worker(p, specific_worker);
-          specific_worker = NULL;
-        }
-      }
-      if (specific_worker != NULL) {
-        GPR_TIMER_MARK("finally_kick", 0);
-        push_back_worker(p, specific_worker);
-        pthread_kill(specific_worker->pt_id, SIGUSR1);
-      }
+    worker = pop_front_worker(p);
+    if (worker != NULL) {
+      GPR_TIMER_MARK("finally_kick", 0);
+      push_back_worker(p, worker);
+      pthread_kill(worker->pt_id, SIGUSR1);
     } else {
       GPR_TIMER_MARK("kicked_no_pollers", 0);
-      p->kicked_without_pollers = 1;
+      p->kicked_without_pollers = true;
     }
   }
 
-  GPR_TIMER_END("pollset_kick_ext", 0);
+  GPR_TIMER_END("pollset_kick", 0);
 }
 
-static void pollset_kick(grpc_pollset *p,
-                         grpc_pollset_worker *specific_worker) {
-  pollset_kick_ext(p, specific_worker, 0);
-}
+static void kick_poller(void) { grpc_wakeup_fd_wakeup(&grpc_global_wakeup_fd); }
 
-/* global state management */
+static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
+  gpr_mu_init(&pollset->mu);
+  *mu = &pollset->mu;
 
-static void sig_handler(int sig_num) {
-  gpr_log(GPR_INFO, "Received signal %d", sig_num);
-}
+  pollset->root_worker.next = pollset->root_worker.prev = &pollset->root_worker;
+  pollset->kicked_without_pollers = false;
 
-static void pollset_global_init(void) {
-  gpr_tls_init(&g_current_thread_poller);
-  gpr_tls_init(&g_current_thread_worker);
-  grpc_wakeup_fd_init(&grpc_global_wakeup_fd);
-  signal(SIGUSR1, sig_handler);
-}
+  pollset->shutting_down = false;
+  pollset->finish_shutdown_called = false;
+  pollset->shutdown_done = NULL;
 
-static void pollset_global_shutdown(void) {
-  grpc_wakeup_fd_destroy(&grpc_global_wakeup_fd);
-  gpr_tls_destroy(&g_current_thread_poller);
-  gpr_tls_destroy(&g_current_thread_worker);
-}
-
-static void kick_poller(void) { grpc_wakeup_fd_wakeup(&grpc_global_wakeup_fd); }
-
-/* TODO: sreek. Try to Remove this forward declaration*/
-static void multipoll_with_epoll_pollset_create_efd(grpc_pollset *pollset);
-
-/* main interface */
-
-static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
-  gpr_mu_init(&pollset->mu);
-  *mu = &pollset->mu;
-  pollset->root_worker.next = pollset->root_worker.prev = &pollset->root_worker;
   gpr_mu_init(&pollset->pi_mu);
   pollset->polling_island = NULL;
-  pollset->shutting_down = 0;
-  pollset->called_shutdown = 0;
-  pollset->kicked_without_pollers = 0;
-
-  multipoll_with_epoll_pollset_create_efd(pollset);
-}
-
-/* TODO(sreek): Maybe merge multipoll_*_destroy() with pollset_destroy()
- * function */
-static void multipoll_with_epoll_pollset_destroy(grpc_pollset *pollset);
-
-static void pollset_destroy(grpc_pollset *pollset) {
-  GPR_ASSERT(!pollset_has_workers(pollset));
-
-  multipoll_with_epoll_pollset_destroy(pollset);
-
-  gpr_mu_destroy(&pollset->pi_mu);
-  gpr_mu_destroy(&pollset->mu);
-}
-
-/* TODO(sreek) - Do something with the pollset island link (??) */
-static void pollset_reset(grpc_pollset *pollset) {
-  GPR_ASSERT(pollset->shutting_down);
-  GPR_ASSERT(!pollset_has_workers(pollset));
-  pollset->shutting_down = 0;
-  pollset->called_shutdown = 0;
-  pollset->kicked_without_pollers = 0;
-}
-
-/* TODO (sreek): Remove multipoll_with_epoll_finish_shutdown() declaration */
-static void multipoll_with_epoll_pollset_finish_shutdown(grpc_pollset *pollset);
-
-static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset) {
-  multipoll_with_epoll_pollset_finish_shutdown(pollset);
-  grpc_exec_ctx_enqueue(exec_ctx, pollset->shutdown_done, true, NULL);
-}
-
-/* TODO(sreek): Remove multipoll_with_epoll_*_maybe_work_and_unlock
- * declaration
- */
-static void multipoll_with_epoll_pollset_maybe_work_and_unlock(
-    grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, grpc_pollset_worker *worker,
-    gpr_timespec deadline, gpr_timespec now);
-
-static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                         grpc_pollset_worker **worker_hdl, gpr_timespec now,
-                         gpr_timespec deadline) {
-  grpc_pollset_worker worker;
-  *worker_hdl = &worker;
-
-  /* pollset->mu already held */
-  int added_worker = 0;
-  int locked = 1;
-  int queued_work = 0;
-  int keep_polling = 0;
-  GPR_TIMER_BEGIN("pollset_work", 0);
-  /* this must happen before we (potentially) drop pollset->mu */
-  worker.next = worker.prev = NULL;
-  worker.kicked_specifically = 0;
-
-  /* TODO(sreek): Abstract this thread id stuff out into a separate file */
-  worker.pt_id = pthread_self();
-  /* If we're shutting down then we don't execute any extended work */
-  if (pollset->shutting_down) {
-    GPR_TIMER_MARK("pollset_work.shutting_down", 0);
-    goto done;
-  }
-  /* Start polling, and keep doing so while we're being asked to
-     re-evaluate our pollers (this allows poll() based pollers to
-     ensure they don't miss wakeups) */
-  keep_polling = 1;
-  while (keep_polling) {
-    keep_polling = 0;
-    if (!pollset->kicked_without_pollers) {
-      if (!added_worker) {
-        push_front_worker(pollset, &worker);
-        added_worker = 1;
-        gpr_tls_set(&g_current_thread_worker, (intptr_t)&worker);
-      }
-      gpr_tls_set(&g_current_thread_poller, (intptr_t)pollset);
-      GPR_TIMER_BEGIN("maybe_work_and_unlock", 0);
-
-      multipoll_with_epoll_pollset_maybe_work_and_unlock(
-          exec_ctx, pollset, &worker, deadline, now);
-
-      GPR_TIMER_END("maybe_work_and_unlock", 0);
-      locked = 0;
-      gpr_tls_set(&g_current_thread_poller, 0);
-    } else {
-      GPR_TIMER_MARK("pollset_work.kicked_without_pollers", 0);
-      pollset->kicked_without_pollers = 0;
-    }
-  /* Finished execution - start cleaning up.
-     Note that we may arrive here from outside the enclosing while() loop.
-     In that case we won't loop though as we haven't added worker to the
-     worker list, which means nobody could ask us to re-evaluate polling). */
-  done:
-    if (!locked) {
-      queued_work |= grpc_exec_ctx_flush(exec_ctx);
-      gpr_mu_lock(&pollset->mu);
-      locked = 1;
-    }
-  }
-  if (added_worker) {
-    remove_worker(pollset, &worker);
-    gpr_tls_set(&g_current_thread_worker, 0);
-  }
-
-  /* check shutdown conditions */
-  if (pollset->shutting_down) {
-    if (pollset_has_workers(pollset)) {
-      pollset_kick(pollset, NULL);
-    } else if (!pollset->called_shutdown) {
-      pollset->called_shutdown = 1;
-      gpr_mu_unlock(&pollset->mu);
-      finish_shutdown(exec_ctx, pollset);
-      grpc_exec_ctx_flush(exec_ctx);
-      /* Continuing to access pollset here is safe -- it is the caller's
-       * responsibility to not destroy when it has outstanding calls to
-       * pollset_work.
-       * TODO(dklempner): Can we refactor the shutdown logic to avoid this? */
-      gpr_mu_lock(&pollset->mu);
-    }
-  }
-  *worker_hdl = NULL;
-  GPR_TIMER_END("pollset_work", 0);
-}
-
-/* TODO: (sreek) Do something with the pollset island link */
-static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                             grpc_closure *closure) {
-  GPR_ASSERT(!pollset->shutting_down);
-  pollset->shutting_down = 1;
-  pollset->shutdown_done = closure;
-  pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
-
-  if (!pollset->called_shutdown && !pollset_has_workers(pollset)) {
-    pollset->called_shutdown = 1;
-    finish_shutdown(exec_ctx, pollset);
-  }
 }
 
+/* Convert a timespec to milliseconds:
+   - Very small or negative poll times are clamped to zero to do a non-blocking
+     poll (which becomes spin polling)
+   - Other small values are rounded up to one millisecond
+   - Longer than a millisecond polls are rounded up to the next nearest
+     millisecond to avoid spinning
+   - Infinite timeouts are converted to -1 */
 static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
                                            gpr_timespec now) {
   gpr_timespec timeout;
@@ -1034,6 +903,7 @@ static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
   if (gpr_time_cmp(deadline, gpr_inf_future(deadline.clock_type)) == 0) {
     return -1;
   }
+
   if (gpr_time_cmp(deadline, gpr_time_add(now, gpr_time_from_micros(
                                                    max_spin_polling_us,
                                                    GPR_TIMESPAN))) <= 0) {
@@ -1044,10 +914,6 @@ static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
       timeout, gpr_time_from_nanos(GPR_NS_PER_MS - 1, GPR_TIMESPAN)));
 }
 
-/*******************************************************************************
- * pollset_multipoller_with_epoll_posix.c
- */
-
 static void set_ready(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure **st) {
   /* only one set_ready can be active at once (but there may be a racing
      notify_on) */
@@ -1064,94 +930,46 @@ static void fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
   set_ready(exec_ctx, fd, &fd->write_closure);
 }
 
-/* TODO: sreek - This function multipoll_with_epoll_pollset_add_fd() and
- * finally_add_fd() in ev_poll_and_epoll_posix.c */
-static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                           grpc_fd *fd) {
-  /* TODO sreek - Check if we need to get a pollset->mu lock here */
-  gpr_mu_lock(&pollset->pi_mu);
-  gpr_mu_lock(&fd->pi_mu);
-
-  polling_island *pi_new = NULL;
-
-  if (fd->polling_island == pollset->polling_island) {
-    pi_new = fd->polling_island;
-    if (pi_new == NULL) {
-      pi_new = polling_island_create(fd, 2);
-    }
-  } else if (fd->polling_island == NULL) {
-    pi_new = polling_island_update_and_lock(pollset->polling_island, 1, 1);
-  } else if (pollset->polling_island == NULL) {
-    pi_new = polling_island_update_and_lock(fd->polling_island, 1, 1);
-  } else {
-    pi_new = polling_island_merge(fd->polling_island, pollset->polling_island);
-  }
-
-  fd->polling_island = pollset->polling_island = pi_new;
-
-  gpr_mu_unlock(&fd->pi_mu);
-  gpr_mu_unlock(&pollset->pi_mu);
-}
-
-/* Creates an epoll fd and initializes the pollset */
-/* TODO: This has to be called ONLY from pollset_init function. and hence it
- * does not acquire any lock */
-static void multipoll_with_epoll_pollset_create_efd(grpc_pollset *pollset) {
-  struct epoll_event ev;
-  int err;
-
-  pollset->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
-  if (pollset->epoll_fd < 0) {
-    gpr_log(GPR_ERROR, "epoll_create1 failed: %s", strerror(errno));
-    abort();
-  }
-
-  ev.events = (uint32_t)(EPOLLIN | EPOLLET);
-  ev.data.ptr = NULL;
-
-  err = epoll_ctl(pollset->epoll_fd, EPOLL_CTL_ADD,
-                  GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd), &ev);
-  if (err < 0) {
-    gpr_log(GPR_ERROR, "epoll_ctl add for %d failed: %s",
-            GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd),
-            strerror(errno));
-  }
-}
-
 /* TODO(klempner): We probably want to turn this down a bit */
 #define GRPC_EPOLL_MAX_EVENTS 1000
-
-static void multipoll_with_epoll_pollset_maybe_work_and_unlock(
-    grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, grpc_pollset_worker *worker,
-    gpr_timespec deadline, gpr_timespec now) {
+static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
+                                    grpc_pollset *pollset, int timeout_ms,
+                                    sigset_t *sig_mask) {
   struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS];
-  int epoll_fd = pollset->epoll_fd;
+  int epoll_fd;
   int ep_rv;
-  int timeout_ms;
+  GPR_TIMER_BEGIN("pollset_work_and_unlock", 0);
+
+  /* We need to get the epoll_fd to wait on. The epoll_fd is in inside the
+     polling island pointed by pollset->polling_island.
+     Acquire the following locks:
+     - pollset->mu (which we already have)
+     - pollset->pi_mu
+     - pollset->polling_island->mu */
+  gpr_mu_lock(&pollset->pi_mu);
+  pollset->polling_island =
+      polling_island_update_and_lock(pollset->polling_island, 1, 0);
 
-  /* If you want to ignore epoll's ability to sanely handle parallel pollers,
-   * for a more apples-to-apples performance comparison with poll, add a
-   * if (pollset->counter != 0) { return 0; }
-   * here.
-   */
+  epoll_fd = pollset->polling_island->epoll_fd;
 
+  /* Release the locks */
+  polling_island_unref_and_unlock(pollset->polling_island, 0); /* Keep the ref*/
+  gpr_mu_unlock(&pollset->pi_mu);
   gpr_mu_unlock(&pollset->mu);
 
-  timeout_ms = poll_deadline_to_millis_timeout(deadline, now);
-
   do {
-    /* The following epoll_wait never blocks; it has a timeout of 0 */
-    ep_rv = epoll_wait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, timeout_ms);
+    ep_rv = epoll_pwait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, timeout_ms,
+                        sig_mask);
+
     if (ep_rv < 0) {
       if (errno != EINTR) {
-        gpr_log(GPR_ERROR, "epoll_wait() failed: %s", strerror(errno));
+        /* TODO (sreek) - Check for bad file descriptor error */
+        gpr_log(GPR_ERROR, "epoll_pwait() failed: %s", strerror(errno));
       }
     } else {
       int i;
       for (i = 0; i < ep_rv; ++i) {
         grpc_fd *fd = ep_ev[i].data.ptr;
-        /* TODO(klempner): We might want to consider making err and pri
-         * separate events */
         int cancel = ep_ev[i].events & (EPOLLERR | EPOLLHUP);
         int read_ev = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
         int write_ev = ep_ev[i].events & EPOLLOUT;
@@ -1168,17 +986,179 @@ static void multipoll_with_epoll_pollset_maybe_work_and_unlock(
       }
     }
   } while (ep_rv == GRPC_EPOLL_MAX_EVENTS);
+
+  GPR_TIMER_END("pollset_work_and_unlock", 0);
+}
+
+/* Release the reference to pollset->polling_island and set it to NULL.
+   pollset->mu must be held */
+static void pollset_release_polling_island_locked(grpc_pollset *pollset) {
+  gpr_mu_lock(&pollset->pi_mu);
+  if (pollset->polling_island) {
+    pollset->polling_island =
+        polling_island_update_and_lock(pollset->polling_island, 1, 0);
+    polling_island_unref_and_unlock(pollset->polling_island, 1);
+    pollset->polling_island = NULL;
+  }
+  gpr_mu_unlock(&pollset->pi_mu);
+}
+
+static void finish_shutdown_locked(grpc_exec_ctx *exec_ctx,
+                                   grpc_pollset *pollset) {
+  /* The pollset cannot have any workers if we are at this stage */
+  GPR_ASSERT(!pollset_has_workers(pollset));
+
+  pollset->finish_shutdown_called = true;
+  pollset_release_polling_island_locked(pollset);
+
+  grpc_exec_ctx_enqueue(exec_ctx, pollset->shutdown_done, true, NULL);
+}
+
+/* pollset->mu lock must be held by the caller before calling this */
+static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                             grpc_closure *closure) {
+  GPR_TIMER_BEGIN("pollset_shutdown", 0);
+  GPR_ASSERT(!pollset->shutting_down);
+  pollset->shutting_down = true;
+  pollset->shutdown_done = closure;
+  pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
+
+  /* If the pollset has any workers, we cannot call finish_shutdown_locked()
+     because it would release the underlying polling island. In such a case, we
+     let the last worker call finish_shutdown_locked() from pollset_work() */
+  if (!pollset_has_workers(pollset)) {
+    GPR_ASSERT(!pollset->finish_shutdown_called);
+    GPR_TIMER_MARK("pollset_shutdown.finish_shutdown_locked", 0);
+    finish_shutdown_locked(exec_ctx, pollset);
+  }
+  GPR_TIMER_END("pollset_shutdown", 0);
 }
 
-static void multipoll_with_epoll_pollset_finish_shutdown(
-    grpc_pollset *pollset) {}
+/* TODO(sreek) Is pollset_shutdown() guranteed to be called before this? */
+static void pollset_destroy(grpc_pollset *pollset) {
+  GPR_ASSERT(!pollset_has_workers(pollset));
+  gpr_mu_destroy(&pollset->pi_mu);
+  gpr_mu_destroy(&pollset->mu);
+}
 
-static void multipoll_with_epoll_pollset_destroy(grpc_pollset *pollset) {
-  close(pollset->epoll_fd);
+static void pollset_reset(grpc_pollset *pollset) {
+  GPR_ASSERT(pollset->shutting_down);
+  GPR_ASSERT(!pollset_has_workers(pollset));
+  pollset->shutting_down = false;
+  pollset->finish_shutdown_called = false;
+  pollset->kicked_without_pollers = false;
+  /* TODO(sreek) - Should pollset->shutdown closure be set to NULL here? */
+  pollset_release_polling_island_locked(pollset);
+}
+
+/* pollset->mu lock must be held by the caller before calling this.
+   The function pollset_work() may temporarily release the lock (pollset->mu)
+   during the course of its execution but it will always re-acquire the lock and
+   ensure that it is held by the time the function returns */
+static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                         grpc_pollset_worker **worker_hdl, gpr_timespec now,
+                         gpr_timespec deadline) {
+  GPR_TIMER_BEGIN("pollset_work", 0);
+
+  int timeout_ms = poll_deadline_to_millis_timeout(deadline, now);
+
+  sigset_t new_mask;
+  sigset_t orig_mask;
+
+  grpc_pollset_worker worker;
+  worker.next = worker.prev = NULL;
+  worker.kicked_specifically = 0;
+  worker.pt_id = pthread_self();
+
+  *worker_hdl = &worker;
+
+  if (pollset->kicked_without_pollers) {
+    /* If the pollset was kicked without pollers, pretend that the current
+       worker got the kick and skip polling. A kick indicates that there is some
+       work that needs attention like an event on the completion queue or an
+       alarm */
+    GPR_TIMER_MARK("pollset_work.kicked_without_pollers", 0);
+    pollset->kicked_without_pollers = 0;
+  } else if (!pollset->shutting_down) {
+    sigemptyset(&new_mask);
+    sigaddset(&new_mask, SIGUSR1);
+    pthread_sigmask(SIG_BLOCK, &new_mask, &orig_mask);
+    sigdelset(&orig_mask, SIGUSR1);
+
+    push_front_worker(pollset, &worker);
+
+    pollset_work_and_unlock(exec_ctx, pollset, timeout_ms, &orig_mask);
+    grpc_exec_ctx_flush(exec_ctx);
+
+    gpr_mu_lock(&pollset->mu);
+    remove_worker(pollset, &worker);
+  }
+
+  /* If we are the last worker on the pollset (i.e pollset_has_workers() is
+     false at this point) and the pollset is shutting down, we may have to
+     finish the shutdown process by calling finish_shutdown_locked().
+     See pollset_shutdown() for more details.
+
+     Note: Continuing to access pollset here is safe; it is the caller's
+     responsibility to not destroy a pollset when it has outstanding calls to
+     pollset_work() */
+  if (pollset->shutting_down && !pollset_has_workers(pollset) &&
+      !pollset->finish_shutdown_called) {
+    GPR_TIMER_MARK("pollset_work.finish_shutdown_locked", 0);
+    finish_shutdown_locked(exec_ctx, pollset);
+
+    gpr_mu_unlock(&pollset->mu);
+    grpc_exec_ctx_flush(exec_ctx);
+    gpr_mu_lock(&pollset->mu);
+  }
+
+  *worker_hdl = NULL;
+  GPR_TIMER_END("pollset_work", 0);
+}
+
+static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                           grpc_fd *fd) {
+  /* TODO sreek - Check if we need to get a pollset->mu lock here */
+  gpr_mu_lock(&pollset->pi_mu);
+  gpr_mu_lock(&fd->pi_mu);
+
+  polling_island *pi_new = NULL;
+
+  /* 1) If fd->polling_island and pollset->polling_island are both non-NULL and
+   *    equal, do nothing.
+   * 2) If fd->polling_island and pollset->polling_island are both NULL, create
+   *    a new polling island (with a refcount of 2) and make the polling_island
+   *    fields in both fd and pollset to point to the new island
+   * 3) If one of fd->polling_island or pollset->polling_island is NULL, update
+   *    the NULL polling_island field to point to the non-NULL polling_island
+   *    field (ensure that the refcount on the polling island is incremented by
+   *    1 to account for the newly added reference)
+   * 4) Finally, if fd->polling_island and pollset->polling_island are non-NULL
+   *    and different, merge both the polling islands and update the
+   *    polling_island fields in both fd and pollset to point to the merged
+   *    polling island.
+   */
+  if (fd->polling_island == pollset->polling_island) {
+    pi_new = fd->polling_island;
+    if (pi_new == NULL) {
+      pi_new = polling_island_create(fd, 2);
+    }
+  } else if (fd->polling_island == NULL) {
+    pi_new = polling_island_update_and_lock(pollset->polling_island, 1, 1);
+  } else if (pollset->polling_island == NULL) {
+    pi_new = polling_island_update_and_lock(fd->polling_island, 1, 1);
+  } else {
+    pi_new = polling_island_merge(fd->polling_island, pollset->polling_island);
+  }
+
+  fd->polling_island = pollset->polling_island = pi_new;
+
+  gpr_mu_unlock(&fd->pi_mu);
+  gpr_mu_unlock(&pollset->pi_mu);
 }
 
 /*******************************************************************************
- * pollset_set_posix.c
+ * Pollset-set Definitions
  */
 
 static grpc_pollset_set *pollset_set_create(void) {
@@ -1200,6 +1180,45 @@ static void pollset_set_destroy(grpc_pollset_set *pollset_set) {
   gpr_free(pollset_set);
 }
 
+static void pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
+                               grpc_pollset_set *pollset_set, grpc_fd *fd) {
+  size_t i;
+  gpr_mu_lock(&pollset_set->mu);
+  if (pollset_set->fd_count == pollset_set->fd_capacity) {
+    pollset_set->fd_capacity = GPR_MAX(8, 2 * pollset_set->fd_capacity);
+    pollset_set->fds = gpr_realloc(
+        pollset_set->fds, pollset_set->fd_capacity * sizeof(*pollset_set->fds));
+  }
+  GRPC_FD_REF(fd, "pollset_set");
+  pollset_set->fds[pollset_set->fd_count++] = fd;
+  for (i = 0; i < pollset_set->pollset_count; i++) {
+    pollset_add_fd(exec_ctx, pollset_set->pollsets[i], fd);
+  }
+  for (i = 0; i < pollset_set->pollset_set_count; i++) {
+    pollset_set_add_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
+  }
+  gpr_mu_unlock(&pollset_set->mu);
+}
+
+static void pollset_set_del_fd(grpc_exec_ctx *exec_ctx,
+                               grpc_pollset_set *pollset_set, grpc_fd *fd) {
+  size_t i;
+  gpr_mu_lock(&pollset_set->mu);
+  for (i = 0; i < pollset_set->fd_count; i++) {
+    if (pollset_set->fds[i] == fd) {
+      pollset_set->fd_count--;
+      GPR_SWAP(grpc_fd *, pollset_set->fds[i],
+               pollset_set->fds[pollset_set->fd_count]);
+      GRPC_FD_UNREF(fd, "pollset_set");
+      break;
+    }
+  }
+  for (i = 0; i < pollset_set->pollset_set_count; i++) {
+    pollset_set_del_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
+  }
+  gpr_mu_unlock(&pollset_set->mu);
+}
+
 static void pollset_set_add_pollset(grpc_exec_ctx *exec_ctx,
                                     grpc_pollset_set *pollset_set,
                                     grpc_pollset *pollset) {
@@ -1281,47 +1300,8 @@ static void pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx,
   gpr_mu_unlock(&bag->mu);
 }
 
-static void pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
-                               grpc_pollset_set *pollset_set, grpc_fd *fd) {
-  size_t i;
-  gpr_mu_lock(&pollset_set->mu);
-  if (pollset_set->fd_count == pollset_set->fd_capacity) {
-    pollset_set->fd_capacity = GPR_MAX(8, 2 * pollset_set->fd_capacity);
-    pollset_set->fds = gpr_realloc(
-        pollset_set->fds, pollset_set->fd_capacity * sizeof(*pollset_set->fds));
-  }
-  GRPC_FD_REF(fd, "pollset_set");
-  pollset_set->fds[pollset_set->fd_count++] = fd;
-  for (i = 0; i < pollset_set->pollset_count; i++) {
-    pollset_add_fd(exec_ctx, pollset_set->pollsets[i], fd);
-  }
-  for (i = 0; i < pollset_set->pollset_set_count; i++) {
-    pollset_set_add_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
-  }
-  gpr_mu_unlock(&pollset_set->mu);
-}
-
-static void pollset_set_del_fd(grpc_exec_ctx *exec_ctx,
-                               grpc_pollset_set *pollset_set, grpc_fd *fd) {
-  size_t i;
-  gpr_mu_lock(&pollset_set->mu);
-  for (i = 0; i < pollset_set->fd_count; i++) {
-    if (pollset_set->fds[i] == fd) {
-      pollset_set->fd_count--;
-      GPR_SWAP(grpc_fd *, pollset_set->fds[i],
-               pollset_set->fds[pollset_set->fd_count]);
-      GRPC_FD_UNREF(fd, "pollset_set");
-      break;
-    }
-  }
-  for (i = 0; i < pollset_set->pollset_set_count; i++) {
-    pollset_set_del_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
-  }
-  gpr_mu_unlock(&pollset_set->mu);
-}
-
 /*******************************************************************************
- * event engine binding
+ * Event engine binding
  */
 
 static void shutdown_engine(void) {

From 73ef9154024290e86a3566a574c04992afc93d00 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Fri, 3 Jun 2016 15:25:05 -0700
Subject: [PATCH 031/280] epoll polling strategy now points to the new code

---
 src/core/lib/iomgr/ev_epoll_linux.c | 4 ----
 src/core/lib/iomgr/ev_posix.c       | 4 ++--
 2 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index ce42a9e7ce6..ab4224b2d56 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -788,16 +788,12 @@ static void sig_handler(int sig_num) {
 
 /* Global state management */
 static void pollset_global_init(void) {
-  gpr_tls_init(&g_current_thread_poller);
-  gpr_tls_init(&g_current_thread_worker);
   grpc_wakeup_fd_init(&grpc_global_wakeup_fd);
   signal(SIGUSR1, sig_handler);
 }
 
 static void pollset_global_shutdown(void) {
   grpc_wakeup_fd_destroy(&grpc_global_wakeup_fd);
-  gpr_tls_destroy(&g_current_thread_poller);
-  gpr_tls_destroy(&g_current_thread_worker);
 }
 
 /* Return 1 if the pollset has active threads in pollset_work (pollset must
diff --git a/src/core/lib/iomgr/ev_posix.c b/src/core/lib/iomgr/ev_posix.c
index 96399ef8379..b6b113aed3f 100644
--- a/src/core/lib/iomgr/ev_posix.c
+++ b/src/core/lib/iomgr/ev_posix.c
@@ -44,7 +44,7 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/useful.h>
 
-#include "src/core/lib/iomgr/ev_epoll_posix.h"
+#include "src/core/lib/iomgr/ev_epoll_linux.h"
 #include "src/core/lib/iomgr/ev_poll_posix.h"
 #include "src/core/lib/support/env.h"
 
@@ -62,7 +62,7 @@ typedef struct {
 } event_engine_factory;
 
 static const event_engine_factory g_factories[] = {
-    {"poll", grpc_init_poll_posix}, {"epoll", grpc_init_epoll_posix},
+    {"poll", grpc_init_poll_posix}, {"epoll", grpc_init_epoll_linux},
 };
 
 static void add(const char *beg, const char *end, char ***ss, size_t *ns) {

From 88ee12fbe98685e736366d6a151a10ed103f8979 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Fri, 3 Jun 2016 19:26:48 -0700
Subject: [PATCH 032/280] Handle pollsets and fds witn no polling islands and
 fix locking bug in pollset_add_fd

---
 src/core/lib/iomgr/ev_epoll_linux.c | 83 ++++++++++++++++-------------
 1 file changed, 45 insertions(+), 38 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index ab4224b2d56..0fb1ccfa0fe 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -701,12 +701,14 @@ static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
      - Decrement the ref count on the polling island and det fd->polling_island
        to NULL */
   gpr_mu_lock(&fd->pi_mu);
-
-  fd->polling_island = polling_island_update_and_lock(fd->polling_island, 1, 0);
-  polling_island_remove_fd_locked(fd->polling_island, fd, !fd->released, true);
-  polling_island_unref_and_unlock(fd->polling_island, 1);
-  fd->polling_island = NULL;
-
+  if (fd->polling_island != NULL) {
+    fd->polling_island =
+        polling_island_update_and_lock(fd->polling_island, 1, 0);
+    polling_island_remove_fd_locked(fd->polling_island, fd, !fd->released,
+                                    true);
+    polling_island_unref_and_unlock(fd->polling_island, 1);
+    fd->polling_island = NULL;
+  }
   gpr_mu_unlock(&fd->pi_mu);
 
   grpc_exec_ctx_enqueue(exec_ctx, fd->on_done_closure, true, NULL);
@@ -926,13 +928,12 @@ static void fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
   set_ready(exec_ctx, fd, &fd->write_closure);
 }
 
-/* TODO(klempner): We probably want to turn this down a bit */
 #define GRPC_EPOLL_MAX_EVENTS 1000
 static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
                                     grpc_pollset *pollset, int timeout_ms,
                                     sigset_t *sig_mask) {
   struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS];
-  int epoll_fd;
+  int epoll_fd = -1;
   int ep_rv;
   GPR_TIMER_BEGIN("pollset_work_and_unlock", 0);
 
@@ -943,45 +944,49 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
      - pollset->pi_mu
      - pollset->polling_island->mu */
   gpr_mu_lock(&pollset->pi_mu);
-  pollset->polling_island =
-      polling_island_update_and_lock(pollset->polling_island, 1, 0);
 
-  epoll_fd = pollset->polling_island->epoll_fd;
+  if (pollset->polling_island != NULL) {
+    pollset->polling_island =
+        polling_island_update_and_lock(pollset->polling_island, 1, 0);
+    epoll_fd = pollset->polling_island->epoll_fd;
+    gpr_mu_unlock(&pollset->polling_island->mu);
+  }
 
-  /* Release the locks */
-  polling_island_unref_and_unlock(pollset->polling_island, 0); /* Keep the ref*/
   gpr_mu_unlock(&pollset->pi_mu);
   gpr_mu_unlock(&pollset->mu);
 
-  do {
-    ep_rv = epoll_pwait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, timeout_ms,
-                        sig_mask);
+  /* If epoll_fd == -1, this is a blank pollset and does not have any fds yet */
+  if (epoll_fd != -1) {
+    do {
+      ep_rv = epoll_pwait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, timeout_ms,
+                          sig_mask);
 
-    if (ep_rv < 0) {
-      if (errno != EINTR) {
-        /* TODO (sreek) - Check for bad file descriptor error */
-        gpr_log(GPR_ERROR, "epoll_pwait() failed: %s", strerror(errno));
-      }
-    } else {
-      int i;
-      for (i = 0; i < ep_rv; ++i) {
-        grpc_fd *fd = ep_ev[i].data.ptr;
-        int cancel = ep_ev[i].events & (EPOLLERR | EPOLLHUP);
-        int read_ev = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
-        int write_ev = ep_ev[i].events & EPOLLOUT;
-        if (fd == NULL) {
-          grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
-        } else {
-          if (read_ev || cancel) {
-            fd_become_readable(exec_ctx, fd);
-          }
-          if (write_ev || cancel) {
-            fd_become_writable(exec_ctx, fd);
+      if (ep_rv < 0) {
+        if (errno != EINTR) {
+          /* TODO (sreek) - Check for bad file descriptor error */
+          gpr_log(GPR_ERROR, "epoll_pwait() failed: %s", strerror(errno));
+        }
+      } else {
+        int i;
+        for (i = 0; i < ep_rv; ++i) {
+          grpc_fd *fd = ep_ev[i].data.ptr;
+          int cancel = ep_ev[i].events & (EPOLLERR | EPOLLHUP);
+          int read_ev = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
+          int write_ev = ep_ev[i].events & EPOLLOUT;
+          if (fd == NULL) {
+            grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
+          } else {
+            if (read_ev || cancel) {
+              fd_become_readable(exec_ctx, fd);
+            }
+            if (write_ev || cancel) {
+              fd_become_writable(exec_ctx, fd);
+            }
           }
         }
       }
-    }
-  } while (ep_rv == GRPC_EPOLL_MAX_EVENTS);
+    } while (ep_rv == GRPC_EPOLL_MAX_EVENTS);
+  }
 
   GPR_TIMER_END("pollset_work_and_unlock", 0);
 }
@@ -1141,8 +1146,10 @@ static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
     }
   } else if (fd->polling_island == NULL) {
     pi_new = polling_island_update_and_lock(pollset->polling_island, 1, 1);
+    gpr_mu_unlock(&pi_new->mu);
   } else if (pollset->polling_island == NULL) {
     pi_new = polling_island_update_and_lock(fd->polling_island, 1, 1);
+    gpr_mu_unlock(&pi_new->mu);
   } else {
     pi_new = polling_island_merge(fd->polling_island, pollset->polling_island);
   }

From 79a6233bef501e1f51250351a55abc61cc024827 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Sat, 4 Jun 2016 14:01:03 -0700
Subject: [PATCH 033/280] Fix a few bugs in ev_epoll_linux.c   1.
 pollset_add_fd: Add fd to epoll set if fd->polling_island == NULL   2.
 close(fd) in fd_orphan instead of polling_island_remove_fd_locked()   since
 fd->polling_island may be NULL   3. If pollset work() is interrupted, do a
 zero timeout epoll_wait().   pollset_work may be called without a polling
 island

---
 src/core/lib/iomgr/ev_epoll_linux.c | 125 +++++++++++++++++-----------
 1 file changed, 78 insertions(+), 47 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 0fb1ccfa0fe..3aa26109f22 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -72,9 +72,14 @@ struct grpc_fd {
   gpr_atm refst;
 
   gpr_mu mu;
+
+  /* Indicates that the fd is shutdown and that any pending read/write closures
+     should fail */
   bool shutdown;
-  int closed;
-  bool released;
+
+  /* The fd is either closed or we relinquished control of it. In either cases,
+     this indicates that the 'fd' on this structure is no longer valid */
+  bool orphaned;
 
   grpc_closure *read_closure;
   grpc_closure *write_closure;
@@ -251,16 +256,13 @@ static void polling_island_remove_all_fds_locked(polling_island *pi,
 
 /* The caller is expected to hold pi->mu lock before calling this function */
 static void polling_island_remove_fd_locked(polling_island *pi, grpc_fd *fd,
-                                            bool close_fd, bool remove_fd_ref) {
+                                            bool is_fd_closed) {
   int err;
   size_t i;
 
-  /* Calling close() on the fd will automatically remove it from the epoll set.
-     If not calling close(), the fd must be explicitly removed from the epoll
-     set */
-  if (close_fd) {
-    close(fd->fd);
-  } else {
+  /* If fd is already closed, then it would have been automatically been removed
+     from the epoll set */
+  if (!is_fd_closed) {
     err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_DEL, fd->fd, NULL);
     if (err < 0 && errno != ENOENT) {
       gpr_log(GPR_ERROR, "epoll_ctl delete for fd: %d failed with error; %s",
@@ -271,9 +273,7 @@ static void polling_island_remove_fd_locked(polling_island *pi, grpc_fd *fd,
   for (i = 0; i < pi->fd_cnt; i++) {
     if (pi->fds[i] == fd) {
       pi->fds[i] = pi->fds[--pi->fd_cnt];
-      if (remove_fd_ref) {
-        GRPC_FD_UNREF(fd, "polling_island");
-      }
+      GRPC_FD_UNREF(fd, "polling_island");
       break;
     }
   }
@@ -644,8 +644,7 @@ static grpc_fd *fd_create(int fd, const char *name) {
   new_fd->polling_island = NULL;
   new_fd->freelist_next = NULL;
   new_fd->on_done_closure = NULL;
-  new_fd->closed = 0;
-  new_fd->released = false;
+  new_fd->orphaned = false;
 
   gpr_mu_unlock(&new_fd->mu);
 
@@ -666,7 +665,7 @@ static bool fd_is_orphaned(grpc_fd *fd) {
 static int fd_wrapped_fd(grpc_fd *fd) {
   int ret_fd = -1;
   gpr_mu_lock(&fd->mu);
-  if (!fd->released && !fd->closed) {
+  if (!fd->orphaned) {
     ret_fd = fd->fd;
   }
   gpr_mu_unlock(&fd->mu);
@@ -678,34 +677,35 @@ static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
                       grpc_closure *on_done, int *release_fd,
                       const char *reason) {
   /* TODO(sreek) In ev_poll_posix.c,the lock is acquired a little later. Why? */
+  bool is_fd_closed = false;
   gpr_mu_lock(&fd->mu);
   fd->on_done_closure = on_done;
 
   /* If release_fd is not NULL, we should be relinquishing control of the file
      descriptor fd->fd (but we still own the grpc_fd structure). */
-  fd->released = release_fd != NULL;
-  if (!fd->released) {
-    shutdown(fd->fd, SHUT_RDWR);
-  } else {
+  if (release_fd != NULL) {
     *release_fd = fd->fd;
+  } else {
+    close(fd->fd);
+    is_fd_closed = true;
   }
 
-  REF_BY(fd, 1, reason); /* Remove active status, but keep referenced */
-  fd->closed = 1;
+  fd->orphaned = true;
+
+  /* Remove the active status but keep referenced. We want this grpc_fd struct
+     to be alive (and not added to freelist) until the end of this function */
+  REF_BY(fd, 1, reason);
 
   /* Remove the fd from the polling island:
      - Update the fd->polling_island to point to the latest polling island
-     - Remove the fd from the polling island. Also, call close() on the file
-       descriptor fd->fd ONLY if we haven't relinquised control (i.e
-       fd->released is 'false')
-     - Decrement the ref count on the polling island and det fd->polling_island
-       to NULL */
+     - Remove the fd from the polling island.
+     - Remove a ref to the polling island and set fd->polling_island to NULL */
   gpr_mu_lock(&fd->pi_mu);
   if (fd->polling_island != NULL) {
     fd->polling_island =
         polling_island_update_and_lock(fd->polling_island, 1, 0);
-    polling_island_remove_fd_locked(fd->polling_island, fd, !fd->released,
-                                    true);
+    polling_island_remove_fd_locked(fd->polling_island, fd, is_fd_closed);
+
     polling_island_unref_and_unlock(fd->polling_island, 1);
     fd->polling_island = NULL;
   }
@@ -839,17 +839,20 @@ static void pollset_kick(grpc_pollset *p,
   grpc_pollset_worker *worker = specific_worker;
   if (worker != NULL) {
     if (worker == GRPC_POLLSET_KICK_BROADCAST) {
-      GPR_TIMER_BEGIN("pollset_kick.broadcast", 0);
+      gpr_log(GPR_DEBUG, "pollset_kick: broadcast!");
       if (pollset_has_workers(p)) {
+        GPR_TIMER_BEGIN("pollset_kick.broadcast", 0);
         for (worker = p->root_worker.next; worker != &p->root_worker;
              worker = worker->next) {
           pthread_kill(worker->pt_id, SIGUSR1);
         }
       } else {
+        gpr_log(GPR_DEBUG, "pollset_kick: (broadcast) Kicked without pollers");
         p->kicked_without_pollers = true;
       }
       GPR_TIMER_END("pollset_kick.broadcast", 0);
     } else {
+      gpr_log(GPR_DEBUG, "pollset_kick: kicked kicked_specifically");
       GPR_TIMER_MARK("kicked_specifically", 0);
       worker->kicked_specifically = true;
       pthread_kill(worker->pt_id, SIGUSR1);
@@ -860,9 +863,11 @@ static void pollset_kick(grpc_pollset *p,
     if (worker != NULL) {
       GPR_TIMER_MARK("finally_kick", 0);
       push_back_worker(p, worker);
+      gpr_log(GPR_DEBUG, "pollset_kick: anonymous kick");
       pthread_kill(worker->pt_id, SIGUSR1);
     } else {
       GPR_TIMER_MARK("kicked_no_pollers", 0);
+      gpr_log(GPR_DEBUG, "pollset_kick: kicked without pollers");
       p->kicked_without_pollers = true;
     }
   }
@@ -935,6 +940,7 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
   struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS];
   int epoll_fd = -1;
   int ep_rv;
+  gpr_log(GPR_DEBUG, "pollset_work_and_unlock: Entering..");
   GPR_TIMER_BEGIN("pollset_work_and_unlock", 0);
 
   /* We need to get the epoll_fd to wait on. The epoll_fd is in inside the
@@ -949,6 +955,16 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
     pollset->polling_island =
         polling_island_update_and_lock(pollset->polling_island, 1, 0);
     epoll_fd = pollset->polling_island->epoll_fd;
+    if (pollset->polling_island->fd_cnt == 0) {
+      gpr_log(GPR_DEBUG, "pollset_work_and_unlock: epoll_fd: %d, No other fds",
+              epoll_fd);
+    }
+    for (size_t i = 0; i < pollset->polling_island->fd_cnt; i++) {
+      gpr_log(GPR_DEBUG,
+              "pollset_work_and_unlock: epoll_fd: %d, fd_count: %d, fd[%d]: %d",
+              epoll_fd, pollset->polling_island->fd_cnt, i,
+              pollset->polling_island->fds[i]->fd);
+    }
     gpr_mu_unlock(&pollset->polling_island->mu);
   }
 
@@ -958,36 +974,47 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
   /* If epoll_fd == -1, this is a blank pollset and does not have any fds yet */
   if (epoll_fd != -1) {
     do {
+      gpr_timespec before_epoll = gpr_now(GPR_CLOCK_PRECISE);
+      gpr_log(GPR_DEBUG, "pollset_work_and_unlock: epoll_wait()....");
       ep_rv = epoll_pwait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, timeout_ms,
                           sig_mask);
+      gpr_timespec after_epoll = gpr_now(GPR_CLOCK_PRECISE);
+      int dur = gpr_time_to_millis(gpr_time_sub(after_epoll, before_epoll));
+      gpr_log(GPR_DEBUG,
+              "pollset_work_and_unlock: DONE epoll_wait() : %d ms, ep_rv: %d",
+              dur, ep_rv);
 
       if (ep_rv < 0) {
         if (errno != EINTR) {
           /* TODO (sreek) - Check for bad file descriptor error */
           gpr_log(GPR_ERROR, "epoll_pwait() failed: %s", strerror(errno));
+        } else {
+          gpr_log(GPR_DEBUG, "pollset_work_and_unlock: 0-timeout epoll_wait()");
+          ep_rv = epoll_wait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, 0);
+          gpr_log(GPR_DEBUG, "pollset_work_and_unlock: ep_rv: %d", ep_rv);
         }
-      } else {
-        int i;
-        for (i = 0; i < ep_rv; ++i) {
-          grpc_fd *fd = ep_ev[i].data.ptr;
-          int cancel = ep_ev[i].events & (EPOLLERR | EPOLLHUP);
-          int read_ev = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
-          int write_ev = ep_ev[i].events & EPOLLOUT;
-          if (fd == NULL) {
-            grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
-          } else {
-            if (read_ev || cancel) {
-              fd_become_readable(exec_ctx, fd);
-            }
-            if (write_ev || cancel) {
-              fd_become_writable(exec_ctx, fd);
-            }
+      }
+
+      int i;
+      for (i = 0; i < ep_rv; ++i) {
+        grpc_fd *fd = ep_ev[i].data.ptr;
+        int cancel = ep_ev[i].events & (EPOLLERR | EPOLLHUP);
+        int read_ev = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
+        int write_ev = ep_ev[i].events & EPOLLOUT;
+        if (fd == NULL) {
+          grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
+        } else {
+          if (read_ev || cancel) {
+            fd_become_readable(exec_ctx, fd);
+          }
+          if (write_ev || cancel) {
+            fd_become_writable(exec_ctx, fd);
           }
         }
       }
     } while (ep_rv == GRPC_EPOLL_MAX_EVENTS);
   }
-
+  gpr_log(GPR_DEBUG, "pollset_work_and_unlock: Leaving..");
   GPR_TIMER_END("pollset_work_and_unlock", 0);
 }
 
@@ -1060,7 +1087,7 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                          grpc_pollset_worker **worker_hdl, gpr_timespec now,
                          gpr_timespec deadline) {
   GPR_TIMER_BEGIN("pollset_work", 0);
-
+  gpr_log(GPR_DEBUG, "pollset_work: enter");
   int timeout_ms = poll_deadline_to_millis_timeout(deadline, now);
 
   sigset_t new_mask;
@@ -1079,6 +1106,7 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
        work that needs attention like an event on the completion queue or an
        alarm */
     GPR_TIMER_MARK("pollset_work.kicked_without_pollers", 0);
+    gpr_log(GPR_INFO, "pollset_work: kicked without pollers..");
     pollset->kicked_without_pollers = 0;
   } else if (!pollset->shutting_down) {
     sigemptyset(&new_mask);
@@ -1113,12 +1141,14 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
     gpr_mu_lock(&pollset->mu);
   }
 
+  gpr_log(GPR_DEBUG, "pollset_work(): leaving");
   *worker_hdl = NULL;
   GPR_TIMER_END("pollset_work", 0);
 }
 
 static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                            grpc_fd *fd) {
+  gpr_log(GPR_DEBUG, "pollset_add_fd: pollset: %p, fd: %d", pollset, fd->fd);
   /* TODO sreek - Check if we need to get a pollset->mu lock here */
   gpr_mu_lock(&pollset->pi_mu);
   gpr_mu_lock(&fd->pi_mu);
@@ -1146,6 +1176,7 @@ static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
     }
   } else if (fd->polling_island == NULL) {
     pi_new = polling_island_update_and_lock(pollset->polling_island, 1, 1);
+    polling_island_add_fds_locked(pollset->polling_island, &fd, 1, true);
     gpr_mu_unlock(&pi_new->mu);
   } else if (pollset->polling_island == NULL) {
     pi_new = polling_island_update_and_lock(fd->polling_island, 1, 1);

From b5fe44ea0f7e5ef6f013d6c97725f93a74fed5ef Mon Sep 17 00:00:00 2001
From: Julien Boeuf <jboeuf@google.com>
Date: Mon, 6 Jun 2016 09:50:38 +0200
Subject: [PATCH 034/280] Adding error details for JWT and oauth2.

---
 src/core/lib/security/credentials/jwt/jwt_credentials.c      | 3 ++-
 .../lib/security/credentials/oauth2/oauth2_credentials.c     | 5 +++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/core/lib/security/credentials/jwt/jwt_credentials.c b/src/core/lib/security/credentials/jwt/jwt_credentials.c
index 0d29729da17..7f96e5247b0 100644
--- a/src/core/lib/security/credentials/jwt/jwt_credentials.c
+++ b/src/core/lib/security/credentials/jwt/jwt_credentials.c
@@ -116,7 +116,8 @@ static void jwt_get_request_metadata(grpc_exec_ctx *exec_ctx,
        GRPC_CREDENTIALS_OK, NULL);
     grpc_credentials_md_store_unref(jwt_md);
   } else {
-    cb(exec_ctx, user_data, NULL, 0, GRPC_CREDENTIALS_ERROR, NULL);
+    cb(exec_ctx, user_data, NULL, 0, GRPC_CREDENTIALS_ERROR,
+       "Could not generate JWT.");
   }
 }
 
diff --git a/src/core/lib/security/credentials/oauth2/oauth2_credentials.c b/src/core/lib/security/credentials/oauth2/oauth2_credentials.c
index 81457183d2d..a0e4b6fe8e9 100644
--- a/src/core/lib/security/credentials/oauth2/oauth2_credentials.c
+++ b/src/core/lib/security/credentials/oauth2/oauth2_credentials.c
@@ -233,10 +233,11 @@ static void on_oauth2_token_fetcher_http_response(
     c->token_expiration =
         gpr_time_add(gpr_now(GPR_CLOCK_REALTIME), token_lifetime);
     r->cb(exec_ctx, r->user_data, c->access_token_md->entries,
-          c->access_token_md->num_entries, status, NULL);
+          c->access_token_md->num_entries, GRPC_CREDENTIALS_OK, NULL);
   } else {
     c->token_expiration = gpr_inf_past(GPR_CLOCK_REALTIME);
-    r->cb(exec_ctx, r->user_data, NULL, 0, status, NULL);
+    r->cb(exec_ctx, r->user_data, NULL, 0, status,
+          "Error occured when fetching oauth2 token.");
   }
   gpr_mu_unlock(&c->mu);
   grpc_credentials_metadata_request_destroy(r);

From 38c0cdee34697bacb95f34d1a4d31131d0df3af5 Mon Sep 17 00:00:00 2001
From: Julien Boeuf <jboeuf@google.com>
Date: Mon, 6 Jun 2016 14:46:08 +0200
Subject: [PATCH 035/280] Fix double-free issue for optional_message.

Also better end to end testing of plumbing of plugin error message.
---
 .../ext/transport/chttp2/transport/chttp2_transport.c     | 8 +++-----
 test/cpp/end2end/end2end_test.cc                          | 6 +++++-
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.c b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
index 1abc49f435e..b0da0578f5e 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.c
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
@@ -1504,17 +1504,15 @@ static void close_from_api(grpc_exec_ctx *exec_ctx,
       gpr_slice_buffer_add(&transport_global->qbuf,
                            gpr_slice_ref(*optional_message));
     }
-
     gpr_slice_buffer_add(
         &transport_global->qbuf,
         grpc_chttp2_rst_stream_create(stream_global->id, GRPC_CHTTP2_NO_ERROR,
                                       &stream_global->stats.outgoing));
-
-    if (optional_message) {
-      gpr_slice_ref(*optional_message);
-    }
   }
 
+  if (optional_message) {
+    gpr_slice_ref(*optional_message);
+  }
   grpc_chttp2_fake_status(exec_ctx, transport_global, stream_global, status,
                           optional_message);
   grpc_chttp2_mark_stream_closed(exec_ctx, transport_global, stream_global, 1,
diff --git a/test/cpp/end2end/end2end_test.cc b/test/cpp/end2end/end2end_test.cc
index f52aa52f39f..4602145f54b 100644
--- a/test/cpp/end2end/end2end_test.cc
+++ b/test/cpp/end2end/end2end_test.cc
@@ -75,6 +75,8 @@ bool CheckIsLocalhost(const grpc::string& addr) {
          addr.substr(0, kIpv6.size()) == kIpv6;
 }
 
+const char kTestCredsPluginErrorMsg[] = "Could not find plugin metadata.";
+
 class TestMetadataCredentialsPlugin : public MetadataCredentialsPlugin {
  public:
   static const char kMetadataKey[];
@@ -99,7 +101,7 @@ class TestMetadataCredentialsPlugin : public MetadataCredentialsPlugin {
       metadata->insert(std::make_pair(kMetadataKey, metadata_value_));
       return Status::OK;
     } else {
-      return Status(StatusCode::NOT_FOUND, "Could not find plugin metadata.");
+      return Status(StatusCode::NOT_FOUND, kTestCredsPluginErrorMsg);
     }
   }
 
@@ -1318,6 +1320,7 @@ TEST_P(SecureEnd2endTest, NonBlockingAuthMetadataPluginFailure) {
   Status s = stub_->Echo(&context, request, &response);
   EXPECT_FALSE(s.ok());
   EXPECT_EQ(s.error_code(), StatusCode::UNAUTHENTICATED);
+  EXPECT_EQ(s.error_message(), kTestCredsPluginErrorMsg);
 }
 
 TEST_P(SecureEnd2endTest, NonBlockingAuthMetadataPluginAndProcessorSuccess) {
@@ -1375,6 +1378,7 @@ TEST_P(SecureEnd2endTest, BlockingAuthMetadataPluginFailure) {
   Status s = stub_->Echo(&context, request, &response);
   EXPECT_FALSE(s.ok());
   EXPECT_EQ(s.error_code(), StatusCode::UNAUTHENTICATED);
+  EXPECT_EQ(s.error_message(), kTestCredsPluginErrorMsg);
 }
 
 TEST_P(SecureEnd2endTest, ClientAuthContext) {

From 7d3d4d48cd3a0b916d7f561f6fa525886fb34d8a Mon Sep 17 00:00:00 2001
From: Julien Boeuf <jboeuf@google.com>
Date: Mon, 6 Jun 2016 14:48:41 +0200
Subject: [PATCH 036/280] Fixing clang-format.

---
 src/core/lib/security/credentials/credentials.h | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/src/core/lib/security/credentials/credentials.h b/src/core/lib/security/credentials/credentials.h
index c6df6cdf2f7..b097233bee4 100644
--- a/src/core/lib/security/credentials/credentials.h
+++ b/src/core/lib/security/credentials/credentials.h
@@ -156,12 +156,9 @@ void grpc_credentials_md_store_unref(grpc_credentials_md_store *store);
 /* --- grpc_call_credentials. --- */
 
 /* error_details must be NULL if status is GRPC_CREDENTIALS_OK. */
-typedef void (*grpc_credentials_metadata_cb)(grpc_exec_ctx *exec_ctx,
-                                             void *user_data,
-                                             grpc_credentials_md *md_elems,
-                                             size_t num_md,
-                                             grpc_credentials_status status,
-                                             const char *error_details);
+typedef void (*grpc_credentials_metadata_cb)(
+    grpc_exec_ctx *exec_ctx, void *user_data, grpc_credentials_md *md_elems,
+    size_t num_md, grpc_credentials_status status, const char *error_details);
 
 typedef struct {
   void (*destruct)(grpc_call_credentials *c);

From 4c11a20bf0b6b1d64a2800bcb06f76404294aa84 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Mon, 6 Jun 2016 09:23:25 -0700
Subject: [PATCH 037/280] Remove unused files

---
 BUILD                                         |    6 -
 Makefile                                      |   38 -
 binding.gyp                                   |    1 -
 build.yaml                                    |   14 -
 config.m4                                     |    1 -
 gRPC.podspec                                  |    3 -
 grpc.gemspec                                  |    2 -
 package.xml                                   |    2 -
 src/core/lib/iomgr/ctiller_ev_epoll_linux.c   |  461 -------
 src/core/lib/iomgr/ev_epoll_linux.c           |    2 +-
 src/core/lib/iomgr/ev_epoll_posix.c           | 1209 -----------------
 src/core/lib/iomgr/ev_epoll_posix.h           |   41 -
 src/python/grpcio/grpc_core_dependencies.py   |    1 -
 test/core/network_benchmarks/epoll_test.c     |  263 ----
 .../network_benchmarks/low_level_ping_pong.c  |    2 -
 tools/doxygen/Doxyfile.core.internal          |    2 -
 tools/run_tests/sources_and_headers.json      |   19 -
 tools/run_tests/tests.json                    |   15 -
 vsprojects/vcxproj/grpc/grpc.vcxproj          |    3 -
 vsprojects/vcxproj/grpc/grpc.vcxproj.filters  |    6 -
 .../grpc_unsecure/grpc_unsecure.vcxproj       |    3 -
 .../grpc_unsecure.vcxproj.filters             |    6 -
 22 files changed, 1 insertion(+), 2099 deletions(-)
 delete mode 100644 src/core/lib/iomgr/ctiller_ev_epoll_linux.c
 delete mode 100644 src/core/lib/iomgr/ev_epoll_posix.c
 delete mode 100644 src/core/lib/iomgr/ev_epoll_posix.h
 delete mode 100644 test/core/network_benchmarks/epoll_test.c

diff --git a/BUILD b/BUILD
index a32352ebb30..70354a88101 100644
--- a/BUILD
+++ b/BUILD
@@ -179,7 +179,6 @@ cc_library(
     "src/core/lib/iomgr/endpoint.h",
     "src/core/lib/iomgr/endpoint_pair.h",
     "src/core/lib/iomgr/ev_epoll_linux.h",
-    "src/core/lib/iomgr/ev_epoll_posix.h",
     "src/core/lib/iomgr/ev_poll_posix.h",
     "src/core/lib/iomgr/ev_posix.h",
     "src/core/lib/iomgr/exec_ctx.h",
@@ -324,7 +323,6 @@ cc_library(
     "src/core/lib/iomgr/endpoint_pair_posix.c",
     "src/core/lib/iomgr/endpoint_pair_windows.c",
     "src/core/lib/iomgr/ev_epoll_linux.c",
-    "src/core/lib/iomgr/ev_epoll_posix.c",
     "src/core/lib/iomgr/ev_poll_posix.c",
     "src/core/lib/iomgr/ev_posix.c",
     "src/core/lib/iomgr/exec_ctx.c",
@@ -551,7 +549,6 @@ cc_library(
     "src/core/lib/iomgr/endpoint.h",
     "src/core/lib/iomgr/endpoint_pair.h",
     "src/core/lib/iomgr/ev_epoll_linux.h",
-    "src/core/lib/iomgr/ev_epoll_posix.h",
     "src/core/lib/iomgr/ev_poll_posix.h",
     "src/core/lib/iomgr/ev_posix.h",
     "src/core/lib/iomgr/exec_ctx.h",
@@ -673,7 +670,6 @@ cc_library(
     "src/core/lib/iomgr/endpoint_pair_posix.c",
     "src/core/lib/iomgr/endpoint_pair_windows.c",
     "src/core/lib/iomgr/ev_epoll_linux.c",
-    "src/core/lib/iomgr/ev_epoll_posix.c",
     "src/core/lib/iomgr/ev_poll_posix.c",
     "src/core/lib/iomgr/ev_posix.c",
     "src/core/lib/iomgr/exec_ctx.c",
@@ -1367,7 +1363,6 @@ objc_library(
     "src/core/lib/iomgr/endpoint_pair_posix.c",
     "src/core/lib/iomgr/endpoint_pair_windows.c",
     "src/core/lib/iomgr/ev_epoll_linux.c",
-    "src/core/lib/iomgr/ev_epoll_posix.c",
     "src/core/lib/iomgr/ev_poll_posix.c",
     "src/core/lib/iomgr/ev_posix.c",
     "src/core/lib/iomgr/exec_ctx.c",
@@ -1573,7 +1568,6 @@ objc_library(
     "src/core/lib/iomgr/endpoint.h",
     "src/core/lib/iomgr/endpoint_pair.h",
     "src/core/lib/iomgr/ev_epoll_linux.h",
-    "src/core/lib/iomgr/ev_epoll_posix.h",
     "src/core/lib/iomgr/ev_poll_posix.h",
     "src/core/lib/iomgr/ev_posix.h",
     "src/core/lib/iomgr/exec_ctx.h",
diff --git a/Makefile b/Makefile
index 235f32d9a30..1c83aec21e7 100644
--- a/Makefile
+++ b/Makefile
@@ -903,7 +903,6 @@ dns_resolver_connectivity_test: $(BINDIR)/$(CONFIG)/dns_resolver_connectivity_te
 dns_resolver_test: $(BINDIR)/$(CONFIG)/dns_resolver_test
 dualstack_socket_test: $(BINDIR)/$(CONFIG)/dualstack_socket_test
 endpoint_pair_test: $(BINDIR)/$(CONFIG)/endpoint_pair_test
-epoll_test: $(BINDIR)/$(CONFIG)/epoll_test
 fd_conservation_posix_test: $(BINDIR)/$(CONFIG)/fd_conservation_posix_test
 fd_posix_test: $(BINDIR)/$(CONFIG)/fd_posix_test
 fling_client: $(BINDIR)/$(CONFIG)/fling_client
@@ -1235,7 +1234,6 @@ buildtests_c: privatelibs_c \
   $(BINDIR)/$(CONFIG)/dns_resolver_test \
   $(BINDIR)/$(CONFIG)/dualstack_socket_test \
   $(BINDIR)/$(CONFIG)/endpoint_pair_test \
-  $(BINDIR)/$(CONFIG)/epoll_test \
   $(BINDIR)/$(CONFIG)/fd_conservation_posix_test \
   $(BINDIR)/$(CONFIG)/fd_posix_test \
   $(BINDIR)/$(CONFIG)/fling_client \
@@ -1499,8 +1497,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/dualstack_socket_test || ( echo test dualstack_socket_test failed ; exit 1 )
 	$(E) "[RUN]     Testing endpoint_pair_test"
 	$(Q) $(BINDIR)/$(CONFIG)/endpoint_pair_test || ( echo test endpoint_pair_test failed ; exit 1 )
-	$(E) "[RUN]     Testing epoll_test"
-	$(Q) $(BINDIR)/$(CONFIG)/epoll_test || ( echo test epoll_test failed ; exit 1 )
 	$(E) "[RUN]     Testing fd_conservation_posix_test"
 	$(Q) $(BINDIR)/$(CONFIG)/fd_conservation_posix_test || ( echo test fd_conservation_posix_test failed ; exit 1 )
 	$(E) "[RUN]     Testing fd_posix_test"
@@ -2491,7 +2487,6 @@ LIBGRPC_SRC = \
     src/core/lib/iomgr/endpoint_pair_posix.c \
     src/core/lib/iomgr/endpoint_pair_windows.c \
     src/core/lib/iomgr/ev_epoll_linux.c \
-    src/core/lib/iomgr/ev_epoll_posix.c \
     src/core/lib/iomgr/ev_poll_posix.c \
     src/core/lib/iomgr/ev_posix.c \
     src/core/lib/iomgr/exec_ctx.c \
@@ -2847,7 +2842,6 @@ LIBGRPC_UNSECURE_SRC = \
     src/core/lib/iomgr/endpoint_pair_posix.c \
     src/core/lib/iomgr/endpoint_pair_windows.c \
     src/core/lib/iomgr/ev_epoll_linux.c \
-    src/core/lib/iomgr/ev_epoll_posix.c \
     src/core/lib/iomgr/ev_poll_posix.c \
     src/core/lib/iomgr/ev_posix.c \
     src/core/lib/iomgr/exec_ctx.c \
@@ -6581,38 +6575,6 @@ endif
 endif
 
 
-EPOLL_TEST_SRC = \
-    test/core/network_benchmarks/epoll_test.c \
-
-EPOLL_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(EPOLL_TEST_SRC))))
-ifeq ($(NO_SECURE),true)
-
-# You can't build secure targets if you don't have OpenSSL.
-
-$(BINDIR)/$(CONFIG)/epoll_test: openssl_dep_error
-
-else
-
-
-
-$(BINDIR)/$(CONFIG)/epoll_test: $(EPOLL_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
-	$(E) "[LD]      Linking $@"
-	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS) $(EPOLL_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/epoll_test
-
-endif
-
-$(OBJDIR)/$(CONFIG)/test/core/network_benchmarks/epoll_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
-
-deps_epoll_test: $(EPOLL_TEST_OBJS:.o=.dep)
-
-ifneq ($(NO_SECURE),true)
-ifneq ($(NO_DEPS),true)
--include $(EPOLL_TEST_OBJS:.o=.dep)
-endif
-endif
-
-
 FD_CONSERVATION_POSIX_TEST_SRC = \
     test/core/iomgr/fd_conservation_posix_test.c \
 
diff --git a/binding.gyp b/binding.gyp
index 41e1b5bb416..255998aafd8 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -582,7 +582,6 @@
         'src/core/lib/iomgr/endpoint_pair_posix.c',
         'src/core/lib/iomgr/endpoint_pair_windows.c',
         'src/core/lib/iomgr/ev_epoll_linux.c',
-        'src/core/lib/iomgr/ev_epoll_posix.c',
         'src/core/lib/iomgr/ev_poll_posix.c',
         'src/core/lib/iomgr/ev_posix.c',
         'src/core/lib/iomgr/exec_ctx.c',
diff --git a/build.yaml b/build.yaml
index db9787546ad..75c7a76bdb3 100644
--- a/build.yaml
+++ b/build.yaml
@@ -166,7 +166,6 @@ filegroups:
   - src/core/lib/iomgr/endpoint.h
   - src/core/lib/iomgr/endpoint_pair.h
   - src/core/lib/iomgr/ev_epoll_linux.h
-  - src/core/lib/iomgr/ev_epoll_posix.h
   - src/core/lib/iomgr/ev_poll_posix.h
   - src/core/lib/iomgr/ev_posix.h
   - src/core/lib/iomgr/exec_ctx.h
@@ -242,7 +241,6 @@ filegroups:
   - src/core/lib/iomgr/endpoint_pair_posix.c
   - src/core/lib/iomgr/endpoint_pair_windows.c
   - src/core/lib/iomgr/ev_epoll_linux.c
-  - src/core/lib/iomgr/ev_epoll_posix.c
   - src/core/lib/iomgr/ev_poll_posix.c
   - src/core/lib/iomgr/ev_posix.c
   - src/core/lib/iomgr/exec_ctx.c
@@ -1321,18 +1319,6 @@ targets:
   - grpc
   - gpr_test_util
   - gpr
-- name: epoll_test
-  build: test
-  language: c
-  src:
-  - test/core/network_benchmarks/epoll_test.c
-  deps:
-  - grpc_test_util
-  - grpc
-  - gpr_test_util
-  - gpr
-  platforms:
-  - linux
 - name: fd_conservation_posix_test
   build: test
   language: c
diff --git a/config.m4 b/config.m4
index 4308295afda..e2d1c00b6e4 100644
--- a/config.m4
+++ b/config.m4
@@ -101,7 +101,6 @@ if test "$PHP_GRPC" != "no"; then
     src/core/lib/iomgr/endpoint_pair_posix.c \
     src/core/lib/iomgr/endpoint_pair_windows.c \
     src/core/lib/iomgr/ev_epoll_linux.c \
-    src/core/lib/iomgr/ev_epoll_posix.c \
     src/core/lib/iomgr/ev_poll_posix.c \
     src/core/lib/iomgr/ev_posix.c \
     src/core/lib/iomgr/exec_ctx.c \
diff --git a/gRPC.podspec b/gRPC.podspec
index de55880125a..736ae98b543 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -182,7 +182,6 @@ Pod::Spec.new do |s|
                       'src/core/lib/iomgr/endpoint.h',
                       'src/core/lib/iomgr/endpoint_pair.h',
                       'src/core/lib/iomgr/ev_epoll_linux.h',
-                      'src/core/lib/iomgr/ev_epoll_posix.h',
                       'src/core/lib/iomgr/ev_poll_posix.h',
                       'src/core/lib/iomgr/ev_posix.h',
                       'src/core/lib/iomgr/exec_ctx.h',
@@ -361,7 +360,6 @@ Pod::Spec.new do |s|
                       'src/core/lib/iomgr/endpoint_pair_posix.c',
                       'src/core/lib/iomgr/endpoint_pair_windows.c',
                       'src/core/lib/iomgr/ev_epoll_linux.c',
-                      'src/core/lib/iomgr/ev_epoll_posix.c',
                       'src/core/lib/iomgr/ev_poll_posix.c',
                       'src/core/lib/iomgr/ev_posix.c',
                       'src/core/lib/iomgr/exec_ctx.c',
@@ -551,7 +549,6 @@ Pod::Spec.new do |s|
                               'src/core/lib/iomgr/endpoint.h',
                               'src/core/lib/iomgr/endpoint_pair.h',
                               'src/core/lib/iomgr/ev_epoll_linux.h',
-                              'src/core/lib/iomgr/ev_epoll_posix.h',
                               'src/core/lib/iomgr/ev_poll_posix.h',
                               'src/core/lib/iomgr/ev_posix.h',
                               'src/core/lib/iomgr/exec_ctx.h',
diff --git a/grpc.gemspec b/grpc.gemspec
index 54ae2eb68dd..01b2890493f 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -191,7 +191,6 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/lib/iomgr/endpoint.h )
   s.files += %w( src/core/lib/iomgr/endpoint_pair.h )
   s.files += %w( src/core/lib/iomgr/ev_epoll_linux.h )
-  s.files += %w( src/core/lib/iomgr/ev_epoll_posix.h )
   s.files += %w( src/core/lib/iomgr/ev_poll_posix.h )
   s.files += %w( src/core/lib/iomgr/ev_posix.h )
   s.files += %w( src/core/lib/iomgr/exec_ctx.h )
@@ -340,7 +339,6 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/lib/iomgr/endpoint_pair_posix.c )
   s.files += %w( src/core/lib/iomgr/endpoint_pair_windows.c )
   s.files += %w( src/core/lib/iomgr/ev_epoll_linux.c )
-  s.files += %w( src/core/lib/iomgr/ev_epoll_posix.c )
   s.files += %w( src/core/lib/iomgr/ev_poll_posix.c )
   s.files += %w( src/core/lib/iomgr/ev_posix.c )
   s.files += %w( src/core/lib/iomgr/exec_ctx.c )
diff --git a/package.xml b/package.xml
index d8e82a8bc37..ba6e11fadc7 100644
--- a/package.xml
+++ b/package.xml
@@ -198,7 +198,6 @@
     <file baseinstalldir="/" name="src/core/lib/iomgr/endpoint.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/endpoint_pair.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/ev_epoll_linux.h" role="src" />
-    <file baseinstalldir="/" name="src/core/lib/iomgr/ev_epoll_posix.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/ev_poll_posix.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/ev_posix.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/exec_ctx.h" role="src" />
@@ -347,7 +346,6 @@
     <file baseinstalldir="/" name="src/core/lib/iomgr/endpoint_pair_posix.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/endpoint_pair_windows.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/ev_epoll_linux.c" role="src" />
-    <file baseinstalldir="/" name="src/core/lib/iomgr/ev_epoll_posix.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/ev_poll_posix.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/ev_posix.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/exec_ctx.c" role="src" />
diff --git a/src/core/lib/iomgr/ctiller_ev_epoll_linux.c b/src/core/lib/iomgr/ctiller_ev_epoll_linux.c
deleted file mode 100644
index 23c20a77aae..00000000000
--- a/src/core/lib/iomgr/ctiller_ev_epoll_linux.c
+++ /dev/null
@@ -1,461 +0,0 @@
-/*
- *
- * Copyright 2015-2016, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include "src/core/lib/iomgr/ev_epoll_linux.h"
-
-#include <errno.h>
-#include <string.h>
-#include <sys/epoll.h>
-#include <unistd.h>
-
-#include <grpc/support/alloc.h>
-#include <grpc/support/atm.h>
-#include <grpc/support/log.h>
-#include <grpc/support/useful.h>
-
-#include "src/core/lib/iomgr/iomgr_internal.h"
-
-/* TODO(sreek) Remove this file */
-
-
-////////////////////////////////////////////////////////////////////////////////
-// Definitions
-
-#define STATE_NOT_READY ((gpr_atm)0)
-#define STATE_READY ((gpr_atm)1)
-
-typedef enum { POLLABLE_FD, POLLABLE_EPOLL_SET } pollable_type;
-
-typedef struct {
-  pollable_type type;
-  int fd;
-  grpc_iomgr_object iomgr_object;
-} pollable_object;
-
-typedef struct polling_island {
-  pollable_object pollable;
-  gpr_mu mu;
-  int refs;
-  grpc_fd *only_fd;
-  struct polling_island *became;
-  struct polling_island *next;
-} polling_island;
-
-struct grpc_fd {
-  pollable_object pollable;
-
-  // each event atomic is a tri state:
-  //   STATE_NOT_READY - no event received, nobody waiting for it either
-  //   STATE_READY - event received, nobody waiting for it
-  //   closure pointer - no event received, upper layer is waiting for it
-  gpr_atm on_readable;
-  gpr_atm on_writable;
-
-  // mutex guarding set_ready & shutdown state
-  gpr_mu set_ready_mu;
-  bool shutdown;
-
-  // mutex protecting polling_island
-  gpr_mu polling_island_mu;
-  // current polling island
-  polling_island *polling_island;
-
-  grpc_fd *next_free;
-};
-
-struct grpc_pollset_worker {};
-
-struct grpc_pollset {
-  gpr_mu mu;
-  // current polling island
-  polling_island *polling_island;
-};
-
-////////////////////////////////////////////////////////////////////////////////
-// Polling island implementation
-
-static gpr_mu g_pi_freelist_mu;
-static polling_island *g_first_free_pi;
-
-static void add_pollable_to_epoll_set(pollable_object *pollable, int epoll_set,
-                                      uint32_t events) {
-  struct epoll_event ev;
-  ev.events = events;
-  ev.data.ptr = pollable;
-  int err = epoll_ctl(epoll_set, EPOLL_CTL_ADD, pollable->fd, &ev);
-  if (err < 0) {
-    gpr_log(GPR_ERROR, "epoll_ctl add for %d faild: %s", pollable->fd,
-            strerror(errno));
-  }
-}
-
-static void add_fd_to_epoll_set(grpc_fd *fd, int epoll_set) {
-  add_pollable_to_epoll_set(&fd->pollable, epoll_set,
-                            EPOLLIN | EPOLLOUT | EPOLLET);
-}
-
-static void add_island_to_epoll_set(polling_island *pi, int epoll_set) {
-  add_pollable_to_epoll_set(&pi->pollable, epoll_set, EPOLLIN | EPOLLET);
-}
-
-static polling_island *polling_island_create(grpc_fd *initial_fd) {
-  polling_island *r = NULL;
-  gpr_mu_lock(&g_pi_freelist_mu);
-  if (g_first_free_pi == NULL) {
-    r = gpr_malloc(sizeof(*r));
-    r->pollable.type = POLLABLE_EPOLL_SET;
-    gpr_mu_init(&r->mu);
-  } else {
-    r = g_first_free_pi;
-    g_first_free_pi = r->next;
-  }
-  gpr_mu_unlock(&g_pi_freelist_mu);
-
-  r->pollable.fd = epoll_create1(EPOLL_CLOEXEC);
-  GPR_ASSERT(r->pollable.fd >= 0);
-
-  gpr_mu_lock(&r->mu);
-  r->only_fd = initial_fd;
-  r->refs = 2;  // creation of a polling island => a referencing pollset & fd
-  gpr_mu_unlock(&r->mu);
-
-  add_fd_to_epoll_set(initial_fd, r->pollable.fd);
-  return r;
-}
-
-static void polling_island_delete(polling_island *p) {
-  gpr_mu_lock(&g_pi_freelist_mu);
-  p->next = g_first_free_pi;
-  g_first_free_pi = p;
-  gpr_mu_unlock(&g_pi_freelist_mu);
-}
-
-static polling_island *polling_island_add(polling_island *p, grpc_fd *fd) {
-  gpr_mu_lock(&p->mu);
-  p->only_fd = NULL;
-  p->refs++;  // new fd picks up a ref
-  gpr_mu_unlock(&p->mu);
-
-  add_fd_to_epoll_set(fd, p->pollable.fd);
-
-  return p;
-}
-
-static void add_siblings_to(polling_island *siblings, polling_island *dest) {
-  polling_island *sibling_tail = dest;
-  while (sibling_tail->next != NULL) {
-    sibling_tail = sibling_tail->next;
-  }
-  sibling_tail->next = siblings;
-}
-
-static polling_island *polling_island_merge(polling_island *a,
-                                            polling_island *b) {
-  GPR_ASSERT(a != b);
-  polling_island *out;
-
-  gpr_mu_lock(&GPR_MIN(a, b)->mu);
-  gpr_mu_lock(&GPR_MAX(a, b)->mu);
-
-  GPR_ASSERT(a->became == NULL);
-  GPR_ASSERT(b->became == NULL);
-
-  if (a->only_fd == NULL && b->only_fd == NULL) {
-    b->became = a;
-    add_siblings_to(b, a);
-    add_island_to_epoll_set(b, a->pollable.fd);
-    out = a;
-  } else if (a->only_fd == NULL) {
-    GPR_ASSERT(b->only_fd != NULL);
-    add_fd_to_epoll_set(b->only_fd, a->pollable.fd);
-    b->became = a;
-    out = a;
-  } else if (b->only_fd == NULL) {
-    GPR_ASSERT(a->only_fd != NULL);
-    add_fd_to_epoll_set(a->only_fd, b->pollable.fd);
-    a->became = b;
-    out = b;
-  } else {
-    add_fd_to_epoll_set(b->only_fd, a->pollable.fd);
-    a->only_fd = NULL;
-    b->only_fd = NULL;
-    b->became = a;
-    out = a;
-  }
-
-  gpr_mu_unlock(&a->mu);
-  gpr_mu_unlock(&b->mu);
-
-  return out;
-}
-
-static polling_island *polling_island_update_and_lock(polling_island *p) {
-  gpr_mu_lock(&p->mu);
-  if (p->became != NULL) {
-    do {
-      polling_island *from = p;
-      p = p->became;
-      gpr_mu_lock(&p->mu);
-      bool delete_from = 0 == --from->refs;
-      p->refs++;
-      gpr_mu_unlock(&from->mu);
-      if (delete_from) {
-        polling_island_delete(from);
-      }
-    } while (p->became != NULL);
-  }
-  return p;
-}
-
-static polling_island *polling_island_ref(polling_island *p) {
-  gpr_mu_lock(&p->mu);
-  gpr_mu_unlock(&p->mu);
-  return p;
-}
-
-static void polling_island_drop(polling_island *p) {}
-
-static polling_island *polling_island_update(polling_island *p,
-                                             int updating_owner_count) {
-  p = polling_island_update_and_lock(p);
-  GPR_ASSERT(p->refs != 0);
-  p->refs += updating_owner_count;
-  gpr_mu_unlock(&p->mu);
-  return p;
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// FD implementation
-
-static gpr_mu g_fd_freelist_mu;
-static grpc_fd *g_first_free_fd;
-
-static grpc_fd *fd_create(int fd, const char *name) {
-  grpc_fd *r = NULL;
-  gpr_mu_lock(&g_fd_freelist_mu);
-  if (g_first_free_fd == NULL) {
-    r = gpr_malloc(sizeof(*r));
-    r->pollable.type = POLLABLE_FD;
-    gpr_atm_rel_store(&r->on_readable, 0);
-    gpr_atm_rel_store(&r->on_writable, 0);
-    gpr_mu_init(&r->polling_island_mu);
-    gpr_mu_init(&r->set_ready_mu);
-  } else {
-    r = g_first_free_fd;
-    g_first_free_fd = r->next_free;
-  }
-  gpr_mu_unlock(&g_fd_freelist_mu);
-
-  r->pollable.fd = fd;
-  grpc_iomgr_register_object(&r->pollable.iomgr_object, name);
-  r->next_free = NULL;
-  return r;
-}
-
-static int fd_wrapped_fd(grpc_fd *fd) { return fd->pollable.fd; }
-
-static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                      grpc_closure *on_done, int *release_fd,
-                      const char *reason) {
-  if (release_fd != NULL) {
-    *release_fd = fd->pollable.fd;
-  } else {
-    close(fd->pollable.fd);
-  }
-
-  gpr_mu_lock(&fd->polling_island_mu);
-  if (fd->polling_island != NULL) {
-    polling_island_drop(fd->polling_island);
-  }
-  gpr_mu_unlock(&fd->polling_island_mu);
-
-  gpr_mu_lock(&g_fd_freelist_mu);
-  fd->next_free = g_first_free_fd;
-  g_first_free_fd = fd;
-  grpc_iomgr_unregister_object(&fd->pollable.iomgr_object);
-  gpr_mu_unlock(&g_fd_freelist_mu);
-
-  grpc_exec_ctx_enqueue(exec_ctx, on_done, true, NULL);
-}
-
-static void notify_on(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                      grpc_closure *closure, gpr_atm *state) {
-  if (gpr_atm_acq_cas(state, STATE_NOT_READY, (gpr_atm)closure)) {
-    // state was not ready, and is now the closure - we're done */
-  } else {
-    // cas failed - we MUST be in STATE_READY (can't request two notifications
-    // for the same event)
-    // flip back to not ready, enqueue the closure directly
-    GPR_ASSERT(gpr_atm_rel_cas(state, STATE_READY, STATE_NOT_READY));
-    grpc_exec_ctx_enqueue(exec_ctx, closure, true, NULL);
-  }
-}
-
-static void fd_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                              grpc_closure *closure) {
-  notify_on(exec_ctx, fd, closure, &fd->on_readable);
-}
-
-static void fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                               grpc_closure *closure) {
-  notify_on(exec_ctx, fd, closure, &fd->on_readable);
-}
-
-static void destroy_fd_freelist(void) {
-  while (g_first_free_fd) {
-    grpc_fd *next = g_first_free_fd->next_free;
-    gpr_mu_destroy(&g_first_free_fd->polling_island_mu);
-    gpr_free(next);
-    g_first_free_fd = next;
-  }
-}
-
-static void set_ready_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                             gpr_atm *state) {
-  if (gpr_atm_acq_cas(state, STATE_NOT_READY, STATE_READY)) {
-    // state was not ready, and is now ready - we're done
-  } else {
-    // cas failed - either there's a closure queued which we should consume OR
-    // the state was already STATE_READY
-    gpr_atm cur_state = gpr_atm_acq_load(state);
-    if (cur_state != STATE_READY) {
-      // state wasn't STATE_READY - it *must* have been a closure
-      // since it's illegal to ask for notification twice, it's safe to assume
-      // that we'll resume being the closure
-      GPR_ASSERT(gpr_atm_rel_cas(state, cur_state, STATE_NOT_READY));
-      grpc_exec_ctx_enqueue(exec_ctx, (grpc_closure *)cur_state, !fd->shutdown,
-                            NULL);
-    }
-  }
-}
-
-static void fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
-  gpr_mu_lock(&fd->set_ready_mu);
-  GPR_ASSERT(!fd->shutdown);
-  fd->shutdown = 1;
-  set_ready_locked(exec_ctx, fd, &fd->on_readable);
-  set_ready_locked(exec_ctx, fd, &fd->on_writable);
-  gpr_mu_unlock(&fd->set_ready_mu);
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// Pollset implementation
-
-static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
-  gpr_mu_init(&pollset->mu);
-  *mu = &pollset->mu;
-  pollset->polling_island = NULL;
-}
-
-static void pollset_destroy(grpc_pollset *pollset) {
-  gpr_mu_destroy(&pollset->mu);
-  if (pollset->polling_island) {
-    polling_island_drop(pollset->polling_island);
-  }
-}
-
-static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                           struct grpc_fd *fd) {
-  gpr_mu_lock(&pollset->mu);
-  gpr_mu_lock(&fd->polling_island_mu);
-
-  polling_island *new;
-
-  if (fd->polling_island == NULL) {
-    if (pollset->polling_island == NULL) {
-      new = polling_island_create(fd);
-    } else {
-      new = polling_island_add(pollset->polling_island, fd);
-    }
-  } else if (pollset->polling_island == NULL) {
-    new = polling_island_ref(fd->polling_island);
-  } else if (pollset->polling_island != fd->polling_island) {
-    new = polling_island_merge(pollset->polling_island, fd->polling_island);
-  } else {
-    new = polling_island_update(pollset->polling_island, 1);
-  }
-
-  fd->polling_island = pollset->polling_island = new;
-
-  gpr_mu_unlock(&fd->polling_island_mu);
-  gpr_mu_unlock(&pollset->mu);
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// Engine binding
-
-static void shutdown_engine(void) { destroy_fd_freelist(); }
-
-static const grpc_event_engine_vtable vtable = {
-    .pollset_size = sizeof(grpc_pollset),
-
-    .fd_create = fd_create,
-    .fd_wrapped_fd = fd_wrapped_fd,
-    .fd_orphan = fd_orphan,
-    .fd_shutdown = fd_shutdown,
-    .fd_notify_on_read = fd_notify_on_read,
-    .fd_notify_on_write = fd_notify_on_write,
-
-    .pollset_init = pollset_init,
-    .pollset_shutdown = pollset_shutdown,
-    .pollset_reset = pollset_reset,
-    .pollset_destroy = pollset_destroy,
-    .pollset_work = pollset_work,
-    .pollset_kick = pollset_kick,
-    .pollset_add_fd = pollset_add_fd,
-
-    .pollset_set_create = pollset_set_create,
-    .pollset_set_destroy = pollset_set_destroy,
-    .pollset_set_add_pollset = pollset_set_add_pollset,
-    .pollset_set_del_pollset = pollset_set_del_pollset,
-    .pollset_set_add_pollset_set = pollset_set_add_pollset_set,
-    .pollset_set_del_pollset_set = pollset_set_del_pollset_set,
-    .pollset_set_add_fd = pollset_set_add_fd,
-    .pollset_set_del_fd = pollset_set_del_fd,
-
-    .kick_poller = kick_poller,
-
-    .shutdown_engine = shutdown_engine,
-};
-
-static bool is_epoll_available(void) {
-  abort();
-  return false;
-}
-
-const grpc_event_engine_vtable *grpc_init_poll_posix(void) {
-  if (!is_epoll_available()) {
-    return NULL;
-  }
-  return &vtable;
-}
diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 3aa26109f22..61106faef90 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -35,7 +35,7 @@
 
 #ifdef GPR_POSIX_SOCKET
 
-#include "src/core/lib/iomgr/ev_epoll_posix.h"
+#include "src/core/lib/iomgr/ev_epoll_linux.h"
 
 #include <assert.h>
 #include <errno.h>
diff --git a/src/core/lib/iomgr/ev_epoll_posix.c b/src/core/lib/iomgr/ev_epoll_posix.c
deleted file mode 100644
index 5abd5b2a94c..00000000000
--- a/src/core/lib/iomgr/ev_epoll_posix.c
+++ /dev/null
@@ -1,1209 +0,0 @@
-/*
- *
- * Copyright 2016, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include <grpc/support/port_platform.h>
-
-#ifdef GPR_POSIX_SOCKET
-
-#include "src/core/lib/iomgr/ev_epoll_posix.h"
-
-#include <assert.h>
-#include <errno.h>
-#include <poll.h>
-#include <signal.h>
-#include <string.h>
-#include <sys/epoll.h>
-#include <sys/socket.h>
-#include <unistd.h>
-
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
-#include <grpc/support/string_util.h>
-#include <grpc/support/tls.h>
-#include <grpc/support/useful.h>
-
-#include "src/core/lib/iomgr/ev_posix.h"
-#include "src/core/lib/iomgr/iomgr_internal.h"
-#include "src/core/lib/iomgr/wakeup_fd_posix.h"
-#include "src/core/lib/profiling/timers.h"
-#include "src/core/lib/support/block_annotate.h"
-
-
-/*******************************************************************************
- * FD declarations
- */
-
-struct grpc_fd {
-  int fd;
-  /* refst format:
-     bit0:   1=active/0=orphaned
-     bit1-n: refcount
-     meaning that mostly we ref by two to avoid altering the orphaned bit,
-     and just unref by 1 when we're ready to flag the object as orphaned */
-  gpr_atm refst;
-
-  gpr_mu mu;
-  int shutdown;
-  int closed;
-  int released;
-
-  grpc_closure *read_closure;
-  grpc_closure *write_closure;
-
-  struct grpc_fd *freelist_next;
-
-  grpc_closure *on_done_closure;
-
-  grpc_iomgr_object iomgr_object;
-};
-
-/* Return 1 if this fd is orphaned, 0 otherwise */
-static bool fd_is_orphaned(grpc_fd *fd);
-
-/* Reference counting for fds */
-/*#define GRPC_FD_REF_COUNT_DEBUG*/
-#ifdef GRPC_FD_REF_COUNT_DEBUG
-static void fd_ref(grpc_fd *fd, const char *reason, const char *file, int line);
-static void fd_unref(grpc_fd *fd, const char *reason, const char *file,
-                     int line);
-#define GRPC_FD_REF(fd, reason) fd_ref(fd, reason, __FILE__, __LINE__)
-#define GRPC_FD_UNREF(fd, reason) fd_unref(fd, reason, __FILE__, __LINE__)
-#else
-static void fd_ref(grpc_fd *fd);
-static void fd_unref(grpc_fd *fd);
-#define GRPC_FD_REF(fd, reason) fd_ref(fd)
-#define GRPC_FD_UNREF(fd, reason) fd_unref(fd)
-#endif
-
-static void fd_global_init(void);
-static void fd_global_shutdown(void);
-
-#define CLOSURE_NOT_READY ((grpc_closure *)0)
-#define CLOSURE_READY ((grpc_closure *)1)
-
-/*******************************************************************************
- * pollset declarations
- */
-
-typedef struct grpc_cached_wakeup_fd {
-  grpc_wakeup_fd fd;
-  struct grpc_cached_wakeup_fd *next;
-} grpc_cached_wakeup_fd;
-
-struct grpc_pollset_worker {
-  grpc_cached_wakeup_fd *wakeup_fd;
-  int reevaluate_polling_on_wakeup;
-  int kicked_specifically;
-  pthread_t pt_id;
-  struct grpc_pollset_worker *next;
-  struct grpc_pollset_worker *prev;
-};
-
-struct grpc_pollset {
-  gpr_mu mu;
-  grpc_pollset_worker root_worker;
-  int shutting_down;
-  int called_shutdown;
-  int kicked_without_pollers;
-  grpc_closure *shutdown_done;
-
-  int epoll_fd;
-
-  /* Local cache of eventfds for workers */
-  grpc_cached_wakeup_fd *local_wakeup_cache;
-};
-
-/* Add an fd to a pollset */
-static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                           struct grpc_fd *fd);
-
-static void pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
-                               grpc_pollset_set *pollset_set, grpc_fd *fd);
-
-/* Convert a timespec to milliseconds:
-   - very small or negative poll times are clamped to zero to do a
-     non-blocking poll (which becomes spin polling)
-   - other small values are rounded up to one millisecond
-   - longer than a millisecond polls are rounded up to the next nearest
-     millisecond to avoid spinning
-   - infinite timeouts are converted to -1 */
-static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
-                                           gpr_timespec now);
-
-/* Allow kick to wakeup the currently polling worker */
-#define GRPC_POLLSET_CAN_KICK_SELF 1
-/* Force the wakee to repoll when awoken */
-#define GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP 2
-/* As per pollset_kick, with an extended set of flags (defined above)
-   -- mostly for fd_posix's use. */
-static void pollset_kick_ext(grpc_pollset *p,
-                             grpc_pollset_worker *specific_worker,
-                             uint32_t flags);
-
-/* turn a pollset into a multipoller: platform specific */
-typedef void (*platform_become_multipoller_type)(grpc_exec_ctx *exec_ctx,
-                                                 grpc_pollset *pollset,
-                                                 struct grpc_fd **fds,
-                                                 size_t fd_count);
-
-/* Return 1 if the pollset has active threads in pollset_work (pollset must
- * be locked) */
-static int pollset_has_workers(grpc_pollset *pollset);
-
-static void remove_fd_from_all_epoll_sets(int fd);
-
-/*******************************************************************************
- * pollset_set definitions
- */
-
-struct grpc_pollset_set {
-  gpr_mu mu;
-
-  size_t pollset_count;
-  size_t pollset_capacity;
-  grpc_pollset **pollsets;
-
-  size_t pollset_set_count;
-  size_t pollset_set_capacity;
-  struct grpc_pollset_set **pollset_sets;
-
-  size_t fd_count;
-  size_t fd_capacity;
-  grpc_fd **fds;
-};
-
-/*******************************************************************************
- * fd_posix.c
- */
-
-/* We need to keep a freelist not because of any concerns of malloc performance
- * but instead so that implementations with multiple threads in (for example)
- * epoll_wait deal with the race between pollset removal and incoming poll
- * notifications.
- *
- * The problem is that the poller ultimately holds a reference to this
- * object, so it is very difficult to know when is safe to free it, at least
- * without some expensive synchronization.
- *
- * If we keep the object freelisted, in the worst case losing this race just
- * becomes a spurious read notification on a reused fd.
- */
-/* TODO(klempner): We could use some form of polling generation count to know
- * when these are safe to free. */
-/* TODO(klempner): Consider disabling freelisting if we don't have multiple
- * threads in poll on the same fd */
-/* TODO(klempner): Batch these allocations to reduce fragmentation */
-static grpc_fd *fd_freelist = NULL;
-static gpr_mu fd_freelist_mu;
-
-static void freelist_fd(grpc_fd *fd) {
-  gpr_mu_lock(&fd_freelist_mu);
-  fd->freelist_next = fd_freelist;
-  fd_freelist = fd;
-  grpc_iomgr_unregister_object(&fd->iomgr_object);
-  gpr_mu_unlock(&fd_freelist_mu);
-}
-
-static grpc_fd *alloc_fd(int fd) {
-  grpc_fd *r = NULL;
-  gpr_mu_lock(&fd_freelist_mu);
-  if (fd_freelist != NULL) {
-    r = fd_freelist;
-    fd_freelist = fd_freelist->freelist_next;
-  }
-  gpr_mu_unlock(&fd_freelist_mu);
-  if (r == NULL) {
-    r = gpr_malloc(sizeof(grpc_fd));
-    gpr_mu_init(&r->mu);
-  }
-
-  gpr_mu_lock(&r->mu);
-  gpr_atm_rel_store(&r->refst, 1);
-  r->shutdown = 0;
-  r->read_closure = CLOSURE_NOT_READY;
-  r->write_closure = CLOSURE_NOT_READY;
-  r->fd = fd;
-  r->freelist_next = NULL;
-  r->on_done_closure = NULL;
-  r->closed = 0;
-  r->released = 0;
-  gpr_mu_unlock(&r->mu);
-  return r;
-}
-
-static void destroy(grpc_fd *fd) {
-  gpr_mu_destroy(&fd->mu);
-  gpr_free(fd);
-}
-
-#ifdef GRPC_FD_REF_COUNT_DEBUG
-#define REF_BY(fd, n, reason) ref_by(fd, n, reason, __FILE__, __LINE__)
-#define UNREF_BY(fd, n, reason) unref_by(fd, n, reason, __FILE__, __LINE__)
-static void ref_by(grpc_fd *fd, int n, const char *reason, const char *file,
-                   int line) {
-  gpr_log(GPR_DEBUG, "FD %d %p   ref %d %d -> %d [%s; %s:%d]", fd->fd, fd, n,
-          gpr_atm_no_barrier_load(&fd->refst),
-          gpr_atm_no_barrier_load(&fd->refst) + n, reason, file, line);
-#else
-#define REF_BY(fd, n, reason) ref_by(fd, n)
-#define UNREF_BY(fd, n, reason) unref_by(fd, n)
-static void ref_by(grpc_fd *fd, int n) {
-#endif
-  GPR_ASSERT(gpr_atm_no_barrier_fetch_add(&fd->refst, n) > 0);
-}
-
-#ifdef GRPC_FD_REF_COUNT_DEBUG
-static void unref_by(grpc_fd *fd, int n, const char *reason, const char *file,
-                     int line) {
-  gpr_atm old;
-  gpr_log(GPR_DEBUG, "FD %d %p unref %d %d -> %d [%s; %s:%d]", fd->fd, fd, n,
-          gpr_atm_no_barrier_load(&fd->refst),
-          gpr_atm_no_barrier_load(&fd->refst) - n, reason, file, line);
-#else
-static void unref_by(grpc_fd *fd, int n) {
-  gpr_atm old;
-#endif
-  old = gpr_atm_full_fetch_add(&fd->refst, -n);
-  if (old == n) {
-    freelist_fd(fd);
-  } else {
-    GPR_ASSERT(old > n);
-  }
-}
-
-static void fd_global_init(void) { gpr_mu_init(&fd_freelist_mu); }
-
-static void fd_global_shutdown(void) {
-  gpr_mu_lock(&fd_freelist_mu);
-  gpr_mu_unlock(&fd_freelist_mu);
-  while (fd_freelist != NULL) {
-    grpc_fd *fd = fd_freelist;
-    fd_freelist = fd_freelist->freelist_next;
-    destroy(fd);
-  }
-  gpr_mu_destroy(&fd_freelist_mu);
-}
-
-static grpc_fd *fd_create(int fd, const char *name) {
-  grpc_fd *r = alloc_fd(fd);
-  char *name2;
-  gpr_asprintf(&name2, "%s fd=%d", name, fd);
-  grpc_iomgr_register_object(&r->iomgr_object, name2);
-  gpr_free(name2);
-#ifdef GRPC_FD_REF_COUNT_DEBUG
-  gpr_log(GPR_DEBUG, "FD %d %p create %s", fd, r, name);
-#endif
-  return r;
-}
-
-static bool fd_is_orphaned(grpc_fd *fd) {
-  return (gpr_atm_acq_load(&fd->refst) & 1) == 0;
-}
-
-static void close_fd_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
-  fd->closed = 1;
-  if (!fd->released) {
-    close(fd->fd);
-  } else {
-    remove_fd_from_all_epoll_sets(fd->fd);
-  }
-  grpc_exec_ctx_enqueue(exec_ctx, fd->on_done_closure, true, NULL);
-}
-
-static int fd_wrapped_fd(grpc_fd *fd) {
-  if (fd->released || fd->closed) {
-    return -1;
-  } else {
-    return fd->fd;
-  }
-}
-
-static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                      grpc_closure *on_done, int *release_fd,
-                      const char *reason) {
-  fd->on_done_closure = on_done;
-  fd->released = release_fd != NULL;
-  if (!fd->released) {
-    shutdown(fd->fd, SHUT_RDWR);
-  } else {
-    *release_fd = fd->fd;
-  }
-  gpr_mu_lock(&fd->mu);
-  REF_BY(fd, 1, reason); /* remove active status, but keep referenced */
-  close_fd_locked(exec_ctx, fd);
-  gpr_mu_unlock(&fd->mu);
-  UNREF_BY(fd, 2, reason); /* drop the reference */
-}
-
-/* increment refcount by two to avoid changing the orphan bit */
-#ifdef GRPC_FD_REF_COUNT_DEBUG
-static void fd_ref(grpc_fd *fd, const char *reason, const char *file,
-                   int line) {
-  ref_by(fd, 2, reason, file, line);
-}
-
-static void fd_unref(grpc_fd *fd, const char *reason, const char *file,
-                     int line) {
-  unref_by(fd, 2, reason, file, line);
-}
-#else
-static void fd_ref(grpc_fd *fd) { ref_by(fd, 2); }
-
-static void fd_unref(grpc_fd *fd) { unref_by(fd, 2); }
-#endif
-
-static void notify_on_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                             grpc_closure **st, grpc_closure *closure) {
-  if (*st == CLOSURE_NOT_READY) {
-    /* not ready ==> switch to a waiting state by setting the closure */
-    *st = closure;
-  } else if (*st == CLOSURE_READY) {
-    /* already ready ==> queue the closure to run immediately */
-    *st = CLOSURE_NOT_READY;
-    grpc_exec_ctx_enqueue(exec_ctx, closure, !fd->shutdown, NULL);
-  } else {
-    /* upcallptr was set to a different closure.  This is an error! */
-    gpr_log(GPR_ERROR,
-            "User called a notify_on function with a previous callback still "
-            "pending");
-    abort();
-  }
-}
-
-/* returns 1 if state becomes not ready */
-static int set_ready_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                            grpc_closure **st) {
-  if (*st == CLOSURE_READY) {
-    /* duplicate ready ==> ignore */
-    return 0;
-  } else if (*st == CLOSURE_NOT_READY) {
-    /* not ready, and not waiting ==> flag ready */
-    *st = CLOSURE_READY;
-    return 0;
-  } else {
-    /* waiting ==> queue closure */
-    grpc_exec_ctx_enqueue(exec_ctx, *st, !fd->shutdown, NULL);
-    *st = CLOSURE_NOT_READY;
-    return 1;
-  }
-}
-
-static void fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
-  gpr_mu_lock(&fd->mu);
-  GPR_ASSERT(!fd->shutdown);
-  fd->shutdown = 1;
-  set_ready_locked(exec_ctx, fd, &fd->read_closure);
-  set_ready_locked(exec_ctx, fd, &fd->write_closure);
-  gpr_mu_unlock(&fd->mu);
-}
-
-static void fd_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                              grpc_closure *closure) {
-  gpr_mu_lock(&fd->mu);
-  notify_on_locked(exec_ctx, fd, &fd->read_closure, closure);
-  gpr_mu_unlock(&fd->mu);
-}
-
-static void fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                               grpc_closure *closure) {
-  gpr_mu_lock(&fd->mu);
-  notify_on_locked(exec_ctx, fd, &fd->write_closure, closure);
-  gpr_mu_unlock(&fd->mu);
-}
-
-/*******************************************************************************
- * pollset_posix.c
- */
-
-GPR_TLS_DECL(g_current_thread_poller);
-GPR_TLS_DECL(g_current_thread_worker);
-
-/** The alarm system needs to be able to wakeup 'some poller' sometimes
- *  (specifically when a new alarm needs to be triggered earlier than the next
- *  alarm 'epoch').
- *  This wakeup_fd gives us something to alert on when such a case occurs. */
-grpc_wakeup_fd grpc_global_wakeup_fd;
-
-static void remove_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
-  worker->prev->next = worker->next;
-  worker->next->prev = worker->prev;
-}
-
-static int pollset_has_workers(grpc_pollset *p) {
-  return p->root_worker.next != &p->root_worker;
-}
-
-static grpc_pollset_worker *pop_front_worker(grpc_pollset *p) {
-  if (pollset_has_workers(p)) {
-    grpc_pollset_worker *w = p->root_worker.next;
-    remove_worker(p, w);
-    return w;
-  } else {
-    return NULL;
-  }
-}
-
-static void push_back_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
-  worker->next = &p->root_worker;
-  worker->prev = worker->next->prev;
-  worker->prev->next = worker->next->prev = worker;
-}
-
-static void push_front_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
-  worker->prev = &p->root_worker;
-  worker->next = worker->prev->next;
-  worker->prev->next = worker->next->prev = worker;
-}
-
-static void pollset_kick_ext(grpc_pollset *p,
-                             grpc_pollset_worker *specific_worker,
-                             uint32_t flags) {
-  GPR_TIMER_BEGIN("pollset_kick_ext", 0);
-
-  /* pollset->mu already held */
-  if (specific_worker != NULL) {
-    if (specific_worker == GRPC_POLLSET_KICK_BROADCAST) {
-      GPR_TIMER_BEGIN("pollset_kick_ext.broadcast", 0);
-      GPR_ASSERT((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) == 0);
-      for (specific_worker = p->root_worker.next;
-           specific_worker != &p->root_worker;
-           specific_worker = specific_worker->next) {
-        grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
-      }
-      p->kicked_without_pollers = 1;
-      GPR_TIMER_END("pollset_kick_ext.broadcast", 0);
-    } else if (gpr_tls_get(&g_current_thread_worker) !=
-               (intptr_t)specific_worker) {
-      GPR_TIMER_MARK("different_thread_worker", 0);
-      if ((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) != 0) {
-        specific_worker->reevaluate_polling_on_wakeup = 1;
-      }
-      specific_worker->kicked_specifically = 1;
-      grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
-      /* TODO (sreek): Refactor this into a separate file*/
-      pthread_kill(specific_worker->pt_id, SIGUSR1);
-    } else if ((flags & GRPC_POLLSET_CAN_KICK_SELF) != 0) {
-      GPR_TIMER_MARK("kick_yoself", 0);
-      if ((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) != 0) {
-        specific_worker->reevaluate_polling_on_wakeup = 1;
-      }
-      specific_worker->kicked_specifically = 1;
-      grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
-    }
-  } else if (gpr_tls_get(&g_current_thread_poller) != (intptr_t)p) {
-    GPR_ASSERT((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) == 0);
-    GPR_TIMER_MARK("kick_anonymous", 0);
-    specific_worker = pop_front_worker(p);
-    if (specific_worker != NULL) {
-      if (gpr_tls_get(&g_current_thread_worker) == (intptr_t)specific_worker) {
-        GPR_TIMER_MARK("kick_anonymous_not_self", 0);
-        push_back_worker(p, specific_worker);
-        specific_worker = pop_front_worker(p);
-        if ((flags & GRPC_POLLSET_CAN_KICK_SELF) == 0 &&
-            gpr_tls_get(&g_current_thread_worker) ==
-                (intptr_t)specific_worker) {
-          push_back_worker(p, specific_worker);
-          specific_worker = NULL;
-        }
-      }
-      if (specific_worker != NULL) {
-        GPR_TIMER_MARK("finally_kick", 0);
-        push_back_worker(p, specific_worker);
-        grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
-      }
-    } else {
-      GPR_TIMER_MARK("kicked_no_pollers", 0);
-      p->kicked_without_pollers = 1;
-    }
-  }
-
-  GPR_TIMER_END("pollset_kick_ext", 0);
-}
-
-static void pollset_kick(grpc_pollset *p,
-                         grpc_pollset_worker *specific_worker) {
-  pollset_kick_ext(p, specific_worker, 0);
-}
-
-/* global state management */
-
-static void sig_handler(int sig_num) {
-  gpr_log(GPR_INFO, "Received signal %d", sig_num);
-}
-
-static void pollset_global_init(void) {
-  gpr_tls_init(&g_current_thread_poller);
-  gpr_tls_init(&g_current_thread_worker);
-  grpc_wakeup_fd_init(&grpc_global_wakeup_fd);
-  signal(SIGUSR1, sig_handler);
-}
-
-static void pollset_global_shutdown(void) {
-  grpc_wakeup_fd_destroy(&grpc_global_wakeup_fd);
-  gpr_tls_destroy(&g_current_thread_poller);
-  gpr_tls_destroy(&g_current_thread_worker);
-}
-
-static void kick_poller(void) { grpc_wakeup_fd_wakeup(&grpc_global_wakeup_fd); }
-
-/* TODO: sreek. Try to Remove this forward declaration*/
-static void multipoll_with_epoll_pollset_create_efd(grpc_pollset *pollset);
-
-/* main interface */
-
-static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
-  gpr_mu_init(&pollset->mu);
-  *mu = &pollset->mu;
-  pollset->root_worker.next = pollset->root_worker.prev = &pollset->root_worker;
-  pollset->shutting_down = 0;
-  pollset->called_shutdown = 0;
-  pollset->kicked_without_pollers = 0;
-  pollset->local_wakeup_cache = NULL;
-  pollset->kicked_without_pollers = 0;
-
-  multipoll_with_epoll_pollset_create_efd(pollset);
-}
-
-/* TODO(sreek): Maybe merge multipoll_*_destroy() with pollset_destroy()
- * function */
-static void multipoll_with_epoll_pollset_destroy(grpc_pollset *pollset);
-
-static void pollset_destroy(grpc_pollset *pollset) {
-  GPR_ASSERT(!pollset_has_workers(pollset));
-
-  multipoll_with_epoll_pollset_destroy(pollset);
-
-  while (pollset->local_wakeup_cache) {
-    grpc_cached_wakeup_fd *next = pollset->local_wakeup_cache->next;
-    grpc_wakeup_fd_destroy(&pollset->local_wakeup_cache->fd);
-    gpr_free(pollset->local_wakeup_cache);
-    pollset->local_wakeup_cache = next;
-  }
-  gpr_mu_destroy(&pollset->mu);
-}
-
-static void pollset_reset(grpc_pollset *pollset) {
-  GPR_ASSERT(pollset->shutting_down);
-  GPR_ASSERT(!pollset_has_workers(pollset));
-  pollset->shutting_down = 0;
-  pollset->called_shutdown = 0;
-  pollset->kicked_without_pollers = 0;
-}
-
-/* TODO (sreek): Remove multipoll_with_epoll_finish_shutdown() declaration */
-static void multipoll_with_epoll_pollset_finish_shutdown(grpc_pollset *pollset);
-
-static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset) {
-  multipoll_with_epoll_pollset_finish_shutdown(pollset);
-  grpc_exec_ctx_enqueue(exec_ctx, pollset->shutdown_done, true, NULL);
-}
-
-/* TODO(sreek): Remove multipoll_with_epoll_*_maybe_work_and_unlock declaration
- */
-static void multipoll_with_epoll_pollset_maybe_work_and_unlock(
-    grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, grpc_pollset_worker *worker,
-    gpr_timespec deadline, gpr_timespec now);
-
-static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                         grpc_pollset_worker **worker_hdl, gpr_timespec now,
-                         gpr_timespec deadline) {
-  grpc_pollset_worker worker;
-  *worker_hdl = &worker;
-
-  /* pollset->mu already held */
-  int added_worker = 0;
-  int locked = 1;
-  int queued_work = 0;
-  int keep_polling = 0;
-  GPR_TIMER_BEGIN("pollset_work", 0);
-  /* this must happen before we (potentially) drop pollset->mu */
-  worker.next = worker.prev = NULL;
-  worker.reevaluate_polling_on_wakeup = 0;
-  if (pollset->local_wakeup_cache != NULL) {
-    worker.wakeup_fd = pollset->local_wakeup_cache;
-    pollset->local_wakeup_cache = worker.wakeup_fd->next;
-  } else {
-    worker.wakeup_fd = gpr_malloc(sizeof(*worker.wakeup_fd));
-    grpc_wakeup_fd_init(&worker.wakeup_fd->fd);
-  }
-  worker.kicked_specifically = 0;
-
-  /* TODO(sreek): Abstract this thread id stuff out into a separate file */
-  worker.pt_id = pthread_self();
-  /* If we're shutting down then we don't execute any extended work */
-  if (pollset->shutting_down) {
-    GPR_TIMER_MARK("pollset_work.shutting_down", 0);
-    goto done;
-  }
-  /* Start polling, and keep doing so while we're being asked to
-     re-evaluate our pollers (this allows poll() based pollers to
-     ensure they don't miss wakeups) */
-  keep_polling = 1;
-  while (keep_polling) {
-    keep_polling = 0;
-    if (!pollset->kicked_without_pollers) {
-      if (!added_worker) {
-        push_front_worker(pollset, &worker);
-        added_worker = 1;
-        gpr_tls_set(&g_current_thread_worker, (intptr_t)&worker);
-      }
-      gpr_tls_set(&g_current_thread_poller, (intptr_t)pollset);
-      GPR_TIMER_BEGIN("maybe_work_and_unlock", 0);
-
-      multipoll_with_epoll_pollset_maybe_work_and_unlock(
-          exec_ctx, pollset, &worker, deadline, now);
-
-      GPR_TIMER_END("maybe_work_and_unlock", 0);
-      locked = 0;
-      gpr_tls_set(&g_current_thread_poller, 0);
-    } else {
-      GPR_TIMER_MARK("pollset_work.kicked_without_pollers", 0);
-      pollset->kicked_without_pollers = 0;
-    }
-  /* Finished execution - start cleaning up.
-     Note that we may arrive here from outside the enclosing while() loop.
-     In that case we won't loop though as we haven't added worker to the
-     worker list, which means nobody could ask us to re-evaluate polling). */
-  done:
-    if (!locked) {
-      queued_work |= grpc_exec_ctx_flush(exec_ctx);
-      gpr_mu_lock(&pollset->mu);
-      locked = 1;
-    }
-    /* If we're forced to re-evaluate polling (via pollset_kick with
-       GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) then we land here and force
-       a loop */
-    if (worker.reevaluate_polling_on_wakeup) {
-      worker.reevaluate_polling_on_wakeup = 0;
-      pollset->kicked_without_pollers = 0;
-      if (queued_work || worker.kicked_specifically) {
-        /* If there's queued work on the list, then set the deadline to be
-           immediate so we get back out of the polling loop quickly */
-        deadline = gpr_inf_past(GPR_CLOCK_MONOTONIC);
-      }
-      keep_polling = 1;
-    }
-  }
-  if (added_worker) {
-    remove_worker(pollset, &worker);
-    gpr_tls_set(&g_current_thread_worker, 0);
-  }
-  /* release wakeup fd to the local pool */
-  worker.wakeup_fd->next = pollset->local_wakeup_cache;
-  pollset->local_wakeup_cache = worker.wakeup_fd;
-  /* check shutdown conditions */
-  if (pollset->shutting_down) {
-    if (pollset_has_workers(pollset)) {
-      pollset_kick(pollset, NULL);
-    } else if (!pollset->called_shutdown) {
-      pollset->called_shutdown = 1;
-      gpr_mu_unlock(&pollset->mu);
-      finish_shutdown(exec_ctx, pollset);
-      grpc_exec_ctx_flush(exec_ctx);
-      /* Continuing to access pollset here is safe -- it is the caller's
-       * responsibility to not destroy when it has outstanding calls to
-       * pollset_work.
-       * TODO(dklempner): Can we refactor the shutdown logic to avoid this? */
-      gpr_mu_lock(&pollset->mu);
-    }
-  }
-  *worker_hdl = NULL;
-  GPR_TIMER_END("pollset_work", 0);
-}
-
-static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                             grpc_closure *closure) {
-  GPR_ASSERT(!pollset->shutting_down);
-  pollset->shutting_down = 1;
-  pollset->shutdown_done = closure;
-  pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
-
-  if (!pollset->called_shutdown && !pollset_has_workers(pollset)) {
-    pollset->called_shutdown = 1;
-    finish_shutdown(exec_ctx, pollset);
-  }
-}
-
-static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
-                                           gpr_timespec now) {
-  gpr_timespec timeout;
-  static const int64_t max_spin_polling_us = 10;
-  if (gpr_time_cmp(deadline, gpr_inf_future(deadline.clock_type)) == 0) {
-    return -1;
-  }
-  if (gpr_time_cmp(deadline, gpr_time_add(now, gpr_time_from_micros(
-                                                   max_spin_polling_us,
-                                                   GPR_TIMESPAN))) <= 0) {
-    return 0;
-  }
-  timeout = gpr_time_sub(deadline, now);
-  return gpr_time_to_millis(gpr_time_add(
-      timeout, gpr_time_from_nanos(GPR_NS_PER_MS - 1, GPR_TIMESPAN)));
-}
-
-/*******************************************************************************
- * pollset_multipoller_with_epoll_posix.c
- */
-
-static void set_ready(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure **st) {
-  /* only one set_ready can be active at once (but there may be a racing
-     notify_on) */
-  gpr_mu_lock(&fd->mu);
-  set_ready_locked(exec_ctx, fd, st);
-  gpr_mu_unlock(&fd->mu);
-}
-
-static void fd_become_readable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
-  set_ready(exec_ctx, fd, &fd->read_closure);
-}
-
-static void fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
-  set_ready(exec_ctx, fd, &fd->write_closure);
-}
-
-/* TODO (sreek): Maybe this global list is not required. Double check*/
-struct epoll_fd_list {
-  int *epoll_fds;
-  size_t count;
-  size_t capacity;
-};
-
-static struct epoll_fd_list epoll_fd_global_list;
-static gpr_once init_epoll_fd_list_mu = GPR_ONCE_INIT;
-static gpr_mu epoll_fd_list_mu;
-
-static void init_mu(void) { gpr_mu_init(&epoll_fd_list_mu); }
-
-static void add_epoll_fd_to_global_list(int epoll_fd) {
-  gpr_once_init(&init_epoll_fd_list_mu, init_mu);
-
-  gpr_mu_lock(&epoll_fd_list_mu);
-  if (epoll_fd_global_list.count == epoll_fd_global_list.capacity) {
-    epoll_fd_global_list.capacity =
-        GPR_MAX((size_t)8, epoll_fd_global_list.capacity * 2);
-    epoll_fd_global_list.epoll_fds =
-        gpr_realloc(epoll_fd_global_list.epoll_fds,
-                    epoll_fd_global_list.capacity * sizeof(int));
-  }
-  epoll_fd_global_list.epoll_fds[epoll_fd_global_list.count++] = epoll_fd;
-  gpr_mu_unlock(&epoll_fd_list_mu);
-}
-
-static void remove_epoll_fd_from_global_list(int epoll_fd) {
-  gpr_mu_lock(&epoll_fd_list_mu);
-  GPR_ASSERT(epoll_fd_global_list.count > 0);
-  for (size_t i = 0; i < epoll_fd_global_list.count; i++) {
-    if (epoll_fd == epoll_fd_global_list.epoll_fds[i]) {
-      epoll_fd_global_list.epoll_fds[i] =
-          epoll_fd_global_list.epoll_fds[--(epoll_fd_global_list.count)];
-      break;
-    }
-  }
-  gpr_mu_unlock(&epoll_fd_list_mu);
-}
-
-static void remove_fd_from_all_epoll_sets(int fd) {
-  int err;
-  gpr_once_init(&init_epoll_fd_list_mu, init_mu);
-  gpr_mu_lock(&epoll_fd_list_mu);
-  if (epoll_fd_global_list.count == 0) {
-    gpr_mu_unlock(&epoll_fd_list_mu);
-    return;
-  }
-  for (size_t i = 0; i < epoll_fd_global_list.count; i++) {
-    err = epoll_ctl(epoll_fd_global_list.epoll_fds[i], EPOLL_CTL_DEL, fd, NULL);
-    if (err < 0 && errno != ENOENT) {
-      gpr_log(GPR_ERROR, "epoll_ctl del for %d failed: %s", fd,
-              strerror(errno));
-    }
-  }
-  gpr_mu_unlock(&epoll_fd_list_mu);
-}
-
-/* TODO: sreek - This function multipoll_with_epoll_pollset_add_fd() and
- * finally_add_fd() in ev_poll_and_epoll_posix.c */
-static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                           grpc_fd *fd) {
-
-  /* TODO sreek - Check if we need to get a pollset->mu lock here */
-
-  struct epoll_event ev;
-  int err;
-
-  /* Hold a ref to the fd to keep it from being closed during the add. This may
-     result in a spurious wakeup being assigned to this pollset whilst adding,
-     but that should be benign. */
-  /* TODO: (sreek): Understand how a spurious wake up migh be assinged to this
-   * pollset..and how holding a reference will prevent the fd from being closed
-   * (and perhaps more importantly, see how can an fd be closed while being
-   * added to the epollset */
-  GRPC_FD_REF(fd, "add fd");
-
-  gpr_mu_lock(&fd->mu);
-  if (fd->shutdown) {
-    gpr_mu_unlock(&fd->mu);
-    GRPC_FD_UNREF(fd, "add fd");
-    return;
-  }
-  gpr_mu_unlock(&fd->mu);
-
-  ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET);
-  ev.data.ptr = fd;
-  err = epoll_ctl(pollset->epoll_fd, EPOLL_CTL_ADD, fd->fd, &ev);
-  if (err < 0) {
-    /* FDs may be added to a pollset multiple times, so EEXIST is normal. */
-    if (errno != EEXIST) {
-      gpr_log(GPR_ERROR, "epoll_ctl add for %d failed: %s", fd->fd,
-              strerror(errno));
-    }
-  }
-
-  /* The fd might have been orphaned while we were adding it to the epoll set.
-     Close the fd in such a case (which will also take care of removing it from
-     the epoll set */
-  gpr_mu_lock(&fd->mu);
-  if (fd_is_orphaned(fd) && !fd->closed) {
-    close_fd_locked(exec_ctx, fd);
-  }
-  gpr_mu_unlock(&fd->mu);
-
-  GRPC_FD_UNREF(fd, "add fd");
-}
-
-/* Creates an epoll fd and initializes the pollset */
-/* TODO: This has to be called ONLY from pollset_init function. and hence it
- * does not acquire any lock */
-static void multipoll_with_epoll_pollset_create_efd(grpc_pollset *pollset) {
-  struct epoll_event ev;
-  int err;
-
-  pollset->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
-  if (pollset->epoll_fd < 0) {
-    gpr_log(GPR_ERROR, "epoll_create1 failed: %s", strerror(errno));
-    abort();
-  }
-  add_epoll_fd_to_global_list(pollset->epoll_fd);
-
-  ev.events = (uint32_t)(EPOLLIN | EPOLLET);
-  ev.data.ptr = NULL;
-
-  err = epoll_ctl(pollset->epoll_fd, EPOLL_CTL_ADD,
-                  GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd), &ev);
-  if (err < 0) {
-    gpr_log(GPR_ERROR, "epoll_ctl add for %d failed: %s",
-            GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd),
-            strerror(errno));
-  }
-}
-
-/* TODO(klempner): We probably want to turn this down a bit */
-#define GRPC_EPOLL_MAX_EVENTS 1000
-
-static void multipoll_with_epoll_pollset_maybe_work_and_unlock(
-    grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, grpc_pollset_worker *worker,
-    gpr_timespec deadline, gpr_timespec now) {
-  struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS];
-  int epoll_fd = pollset->epoll_fd;
-  int ep_rv;
-  int poll_rv;
-  int timeout_ms;
-  struct pollfd pfds[2];
-
-  /* If you want to ignore epoll's ability to sanely handle parallel pollers,
-   * for a more apples-to-apples performance comparison with poll, add a
-   * if (pollset->counter != 0) { return 0; }
-   * here.
-   */
-
-  gpr_mu_unlock(&pollset->mu);
-
-  timeout_ms = poll_deadline_to_millis_timeout(deadline, now);
-
-  pfds[0].fd = GRPC_WAKEUP_FD_GET_READ_FD(&worker->wakeup_fd->fd);
-  pfds[0].events = POLLIN;
-  pfds[0].revents = 0;
-  pfds[1].fd = epoll_fd;
-  pfds[1].events = POLLIN;
-  pfds[1].revents = 0;
-
-  /* TODO(vpai): Consider first doing a 0 timeout poll here to avoid
-     even going into the blocking annotation if possible */
-  GPR_TIMER_BEGIN("poll", 0);
-  GRPC_SCHEDULING_START_BLOCKING_REGION;
-  poll_rv = grpc_poll_function(pfds, 2, timeout_ms);
-  GRPC_SCHEDULING_END_BLOCKING_REGION;
-  GPR_TIMER_END("poll", 0);
-
-  if (poll_rv < 0) {
-    if (errno != EINTR) {
-      gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
-    }
-  } else if (poll_rv == 0) {
-    /* do nothing */
-  } else {
-    if (pfds[0].revents) {
-      grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd->fd);
-    }
-    if (pfds[1].revents) {
-      do {
-        /* The following epoll_wait never blocks; it has a timeout of 0 */
-        ep_rv = epoll_wait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, 0);
-        if (ep_rv < 0) {
-          if (errno != EINTR) {
-            gpr_log(GPR_ERROR, "epoll_wait() failed: %s", strerror(errno));
-          }
-        } else {
-          int i;
-          for (i = 0; i < ep_rv; ++i) {
-            grpc_fd *fd = ep_ev[i].data.ptr;
-            /* TODO(klempner): We might want to consider making err and pri
-             * separate events */
-            int cancel = ep_ev[i].events & (EPOLLERR | EPOLLHUP);
-            int read_ev = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
-            int write_ev = ep_ev[i].events & EPOLLOUT;
-            if (fd == NULL) {
-              grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
-            } else {
-              if (read_ev || cancel) {
-                fd_become_readable(exec_ctx, fd);
-              }
-              if (write_ev || cancel) {
-                fd_become_writable(exec_ctx, fd);
-              }
-            }
-          }
-        }
-      } while (ep_rv == GRPC_EPOLL_MAX_EVENTS);
-    }
-  }
-}
-
-static void multipoll_with_epoll_pollset_finish_shutdown(
-    grpc_pollset *pollset) {}
-
-static void multipoll_with_epoll_pollset_destroy(grpc_pollset *pollset) {
-  close(pollset->epoll_fd);
-  remove_epoll_fd_from_global_list(pollset->epoll_fd);
-}
-
-/*******************************************************************************
- * pollset_set_posix.c
- */
-
-static grpc_pollset_set *pollset_set_create(void) {
-  grpc_pollset_set *pollset_set = gpr_malloc(sizeof(*pollset_set));
-  memset(pollset_set, 0, sizeof(*pollset_set));
-  gpr_mu_init(&pollset_set->mu);
-  return pollset_set;
-}
-
-static void pollset_set_destroy(grpc_pollset_set *pollset_set) {
-  size_t i;
-  gpr_mu_destroy(&pollset_set->mu);
-  for (i = 0; i < pollset_set->fd_count; i++) {
-    GRPC_FD_UNREF(pollset_set->fds[i], "pollset_set");
-  }
-  gpr_free(pollset_set->pollsets);
-  gpr_free(pollset_set->pollset_sets);
-  gpr_free(pollset_set->fds);
-  gpr_free(pollset_set);
-}
-
-static void pollset_set_add_pollset(grpc_exec_ctx *exec_ctx,
-                                    grpc_pollset_set *pollset_set,
-                                    grpc_pollset *pollset) {
-  size_t i, j;
-  gpr_mu_lock(&pollset_set->mu);
-  if (pollset_set->pollset_count == pollset_set->pollset_capacity) {
-    pollset_set->pollset_capacity =
-        GPR_MAX(8, 2 * pollset_set->pollset_capacity);
-    pollset_set->pollsets =
-        gpr_realloc(pollset_set->pollsets, pollset_set->pollset_capacity *
-                                               sizeof(*pollset_set->pollsets));
-  }
-  pollset_set->pollsets[pollset_set->pollset_count++] = pollset;
-  for (i = 0, j = 0; i < pollset_set->fd_count; i++) {
-    if (fd_is_orphaned(pollset_set->fds[i])) {
-      GRPC_FD_UNREF(pollset_set->fds[i], "pollset_set");
-    } else {
-      pollset_add_fd(exec_ctx, pollset, pollset_set->fds[i]);
-      pollset_set->fds[j++] = pollset_set->fds[i];
-    }
-  }
-  pollset_set->fd_count = j;
-  gpr_mu_unlock(&pollset_set->mu);
-}
-
-static void pollset_set_del_pollset(grpc_exec_ctx *exec_ctx,
-                                    grpc_pollset_set *pollset_set,
-                                    grpc_pollset *pollset) {
-  size_t i;
-  gpr_mu_lock(&pollset_set->mu);
-  for (i = 0; i < pollset_set->pollset_count; i++) {
-    if (pollset_set->pollsets[i] == pollset) {
-      pollset_set->pollset_count--;
-      GPR_SWAP(grpc_pollset *, pollset_set->pollsets[i],
-               pollset_set->pollsets[pollset_set->pollset_count]);
-      break;
-    }
-  }
-  gpr_mu_unlock(&pollset_set->mu);
-}
-
-static void pollset_set_add_pollset_set(grpc_exec_ctx *exec_ctx,
-                                        grpc_pollset_set *bag,
-                                        grpc_pollset_set *item) {
-  size_t i, j;
-  gpr_mu_lock(&bag->mu);
-  if (bag->pollset_set_count == bag->pollset_set_capacity) {
-    bag->pollset_set_capacity = GPR_MAX(8, 2 * bag->pollset_set_capacity);
-    bag->pollset_sets =
-        gpr_realloc(bag->pollset_sets,
-                    bag->pollset_set_capacity * sizeof(*bag->pollset_sets));
-  }
-  bag->pollset_sets[bag->pollset_set_count++] = item;
-  for (i = 0, j = 0; i < bag->fd_count; i++) {
-    if (fd_is_orphaned(bag->fds[i])) {
-      GRPC_FD_UNREF(bag->fds[i], "pollset_set");
-    } else {
-      pollset_set_add_fd(exec_ctx, item, bag->fds[i]);
-      bag->fds[j++] = bag->fds[i];
-    }
-  }
-  bag->fd_count = j;
-  gpr_mu_unlock(&bag->mu);
-}
-
-static void pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx,
-                                        grpc_pollset_set *bag,
-                                        grpc_pollset_set *item) {
-  size_t i;
-  gpr_mu_lock(&bag->mu);
-  for (i = 0; i < bag->pollset_set_count; i++) {
-    if (bag->pollset_sets[i] == item) {
-      bag->pollset_set_count--;
-      GPR_SWAP(grpc_pollset_set *, bag->pollset_sets[i],
-               bag->pollset_sets[bag->pollset_set_count]);
-      break;
-    }
-  }
-  gpr_mu_unlock(&bag->mu);
-}
-
-static void pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
-                               grpc_pollset_set *pollset_set, grpc_fd *fd) {
-  size_t i;
-  gpr_mu_lock(&pollset_set->mu);
-  if (pollset_set->fd_count == pollset_set->fd_capacity) {
-    pollset_set->fd_capacity = GPR_MAX(8, 2 * pollset_set->fd_capacity);
-    pollset_set->fds = gpr_realloc(
-        pollset_set->fds, pollset_set->fd_capacity * sizeof(*pollset_set->fds));
-  }
-  GRPC_FD_REF(fd, "pollset_set");
-  pollset_set->fds[pollset_set->fd_count++] = fd;
-  for (i = 0; i < pollset_set->pollset_count; i++) {
-    pollset_add_fd(exec_ctx, pollset_set->pollsets[i], fd);
-  }
-  for (i = 0; i < pollset_set->pollset_set_count; i++) {
-    pollset_set_add_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
-  }
-  gpr_mu_unlock(&pollset_set->mu);
-}
-
-static void pollset_set_del_fd(grpc_exec_ctx *exec_ctx,
-                               grpc_pollset_set *pollset_set, grpc_fd *fd) {
-  size_t i;
-  gpr_mu_lock(&pollset_set->mu);
-  for (i = 0; i < pollset_set->fd_count; i++) {
-    if (pollset_set->fds[i] == fd) {
-      pollset_set->fd_count--;
-      GPR_SWAP(grpc_fd *, pollset_set->fds[i],
-               pollset_set->fds[pollset_set->fd_count]);
-      GRPC_FD_UNREF(fd, "pollset_set");
-      break;
-    }
-  }
-  for (i = 0; i < pollset_set->pollset_set_count; i++) {
-    pollset_set_del_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
-  }
-  gpr_mu_unlock(&pollset_set->mu);
-}
-
-/*******************************************************************************
- * event engine binding
- */
-
-static void shutdown_engine(void) {
-  fd_global_shutdown();
-  pollset_global_shutdown();
-}
-
-static const grpc_event_engine_vtable vtable = {
-    .pollset_size = sizeof(grpc_pollset),
-
-    .fd_create = fd_create,
-    .fd_wrapped_fd = fd_wrapped_fd,
-    .fd_orphan = fd_orphan,
-    .fd_shutdown = fd_shutdown,
-    .fd_notify_on_read = fd_notify_on_read,
-    .fd_notify_on_write = fd_notify_on_write,
-
-    .pollset_init = pollset_init,
-    .pollset_shutdown = pollset_shutdown,
-    .pollset_reset = pollset_reset,
-    .pollset_destroy = pollset_destroy,
-    .pollset_work = pollset_work,
-    .pollset_kick = pollset_kick,
-    .pollset_add_fd = pollset_add_fd,
-
-    .pollset_set_create = pollset_set_create,
-    .pollset_set_destroy = pollset_set_destroy,
-    .pollset_set_add_pollset = pollset_set_add_pollset,
-    .pollset_set_del_pollset = pollset_set_del_pollset,
-    .pollset_set_add_pollset_set = pollset_set_add_pollset_set,
-    .pollset_set_del_pollset_set = pollset_set_del_pollset_set,
-    .pollset_set_add_fd = pollset_set_add_fd,
-    .pollset_set_del_fd = pollset_set_del_fd,
-
-    .kick_poller = kick_poller,
-
-    .shutdown_engine = shutdown_engine,
-};
-
-const grpc_event_engine_vtable *grpc_init_epoll_posix(void) {
-  fd_global_init();
-  pollset_global_init();
-  return &vtable;
-}
-
-#endif
diff --git a/src/core/lib/iomgr/ev_epoll_posix.h b/src/core/lib/iomgr/ev_epoll_posix.h
deleted file mode 100644
index 35319b4fc5d..00000000000
--- a/src/core/lib/iomgr/ev_epoll_posix.h
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#ifndef GRPC_CORE_LIB_IOMGR_EV_EPOLL_POSIX_H
-#define GRPC_CORE_LIB_IOMGR_EV_EPOLL_POSIX_H
-
-#include "src/core/lib/iomgr/ev_posix.h"
-
-const grpc_event_engine_vtable *grpc_init_epoll_posix(void);
-
-#endif /* GRPC_CORE_LIB_IOMGR_EV_EPOLL_POSIX_H */
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index 13bc6888d66..50a6f196d8d 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -95,7 +95,6 @@ CORE_SOURCE_FILES = [
   'src/core/lib/iomgr/endpoint_pair_posix.c',
   'src/core/lib/iomgr/endpoint_pair_windows.c',
   'src/core/lib/iomgr/ev_epoll_linux.c',
-  'src/core/lib/iomgr/ev_epoll_posix.c',
   'src/core/lib/iomgr/ev_poll_posix.c',
   'src/core/lib/iomgr/ev_posix.c',
   'src/core/lib/iomgr/exec_ctx.c',
diff --git a/test/core/network_benchmarks/epoll_test.c b/test/core/network_benchmarks/epoll_test.c
deleted file mode 100644
index a918dd9bb94..00000000000
--- a/test/core/network_benchmarks/epoll_test.c
+++ /dev/null
@@ -1,263 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-/* TODO: sreek: REMOVE THIS FILE */
-
-#include <grpc/support/port_platform.h>
-
-#include <errno.h>
-#include <netinet/ip.h>
-#include <poll.h>
-#include <signal.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/epoll.h>
-#include <sys/eventfd.h>
-#include <sys/socket.h>
-#include <unistd.h>
-
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
-#include <grpc/support/thd.h>
-#include <grpc/support/useful.h>
-
-int g_signal_num = SIGUSR1;
-
-int g_timeout_secs = 2;
-
-int g_eventfd_create = 1;
-int g_eventfd_wakeup = 0;
-int g_eventfd_teardown = 0;
-int g_close_epoll_fd = 1;
-
-typedef struct thread_args {
-  gpr_thd_id id;
-  int epoll_fd;
-  int thread_num;
-} thread_args;
-
-static int eventfd_create() {
-  if (!g_eventfd_create) {
-    return -1;
-  }
-
-  int efd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
-  GPR_ASSERT(efd >= 0);
-  return efd;
-}
-
-static void eventfd_wakeup(int efd) {
-  if (!g_eventfd_wakeup) {
-    return;
-  }
-
-  int err;
-  do {
-    err = eventfd_write(efd, 1);
-  } while (err < 0 && errno == EINTR);
-}
-
-static void epoll_teardown(int epoll_fd, int fd) {
-  if (!g_eventfd_teardown) {
-    return;
-  }
-
-  if (epoll_ctl(epoll_fd, EPOLL_CTL_DEL, fd, NULL) < 0) {
-    if (errno != ENOENT) {
-      gpr_log(GPR_ERROR, "epoll_ctl: %s", strerror(errno));
-      GPR_ASSERT(0);
-    }
-  }
-}
-
-/* Special case for epoll, where we need to create the fd ahead of time. */
-static int epoll_setup(int fd) {
-  int epoll_fd;
-  struct epoll_event ev;
-
-  epoll_fd = epoll_create(1);
-  if (epoll_fd < 0) {
-    gpr_log(GPR_ERROR, "epoll_create: %s", strerror(errno));
-    return -1;
-  }
-
-  ev.events = (uint32_t)EPOLLIN;
-  ev.data.fd = fd;
-  if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) {
-    if (errno != EEXIST) {
-      gpr_log(GPR_ERROR, "epoll_ctl: %s", strerror(errno));
-      return -1;
-    }
-
-    gpr_log(GPR_ERROR, "epoll_ctl: The fd %d already exists", fd);
-  }
-
-  return epoll_fd;
-}
-
-#define GRPC_EPOLL_MAX_EVENTS 1000
-static void thread_main(void *args) {
-  int ep_rv;
-  struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS];
-  int fd;
-  int i;
-  int cancel;
-  int read;
-  int write;
-  thread_args *thd_args = args;
-  sigset_t new_mask;
-  sigset_t orig_mask;
-  int keep_polling = 0;
-
-  gpr_log(GPR_INFO, "Thread: %d Started", thd_args->thread_num);
-
-  do {
-    keep_polling = 0;
-
-    /* Mask the signal before getting the epoll_fd */
-    gpr_log(GPR_INFO, "Thread: %d Blocking signal: %d", thd_args->thread_num,
-            g_signal_num);
-    sigemptyset(&new_mask);
-    sigaddset(&new_mask, g_signal_num);
-    pthread_sigmask(SIG_BLOCK, &new_mask, &orig_mask);
-
-    gpr_log(GPR_INFO, "Thread: %d Waiting on epoll_wait()",
-            thd_args->thread_num);
-    ep_rv = epoll_pwait(thd_args->epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS,
-                        g_timeout_secs * 5000, &orig_mask);
-    gpr_log(GPR_INFO, "Thread: %d out of epoll_wait. ep_rv = %d",
-            thd_args->thread_num, ep_rv);
-
-    if (ep_rv < 0) {
-      if (errno != EINTR) {
-        gpr_log(GPR_ERROR, "Thread: %d. epoll_wait failed with error: %d",
-                thd_args->thread_num, errno);
-      } else {
-        gpr_log(GPR_INFO,
-                "Thread: %d. epoll_wait was interrupted. Polling again >>>>>>>",
-                thd_args->thread_num);
-        keep_polling = 1;
-      }
-    } else {
-      if (ep_rv == 0) {
-        gpr_log(GPR_INFO,
-                "Thread: %d - epoll_wait returned 0. Most likely a timeout. "
-                "Polling again",
-                thd_args->thread_num);
-        keep_polling = 1;
-      }
-
-      for (i = 0; i < ep_rv; i++) {
-        fd = ep_ev[i].data.fd;
-        cancel = ep_ev[i].events & (EPOLLERR | EPOLLHUP);
-        read = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
-        write = ep_ev[i].events & EPOLLOUT;
-        gpr_log(GPR_INFO,
-                "Thread: %d. epoll_wait returned that fd: %d has event of "
-                "interest. read: %d, write: %d, cancel: %d",
-                thd_args->thread_num, fd, read, write, cancel);
-      }
-    }
-  } while (keep_polling);
-}
-
-static void close_fd(int fd) {
-  if (!g_close_epoll_fd) {
-    return;
-  }
-
-  gpr_log(GPR_INFO, "*** Closing fd : %d ****", fd);
-  close(fd);
-  gpr_log(GPR_INFO, "*** Closed fd : %d ****", fd);
-}
-
-
-static void sig_handler(int sig_num) {
-  gpr_log(GPR_INFO, "<<<<< Received signal %d", sig_num);
-}
-
-static void set_signal_handler() {
-  gpr_log(GPR_INFO, "Setting signal handler");
-  signal(g_signal_num, sig_handler);
-}
-
-#define NUM_THREADS 2
-int main(int argc, char **argv) {
-  int efd;
-  int epoll_fd;
-  int i;
-  thread_args thd_args[NUM_THREADS];
-  gpr_thd_options options = gpr_thd_options_default();
-
-  set_signal_handler();
-
-  gpr_log(GPR_INFO, "Starting..");
-  efd = eventfd_create();
-  gpr_log(GPR_INFO, "Created event fd: %d", efd);
-  epoll_fd = epoll_setup(efd);
-  gpr_log(GPR_INFO, "Created epoll_fd: %d", epoll_fd);
-
-  gpr_thd_options_set_joinable(&options);
-  for (i = 0; i < NUM_THREADS; i++) {
-    thd_args[i].thread_num = i;
-    thd_args[i].epoll_fd = epoll_fd;
-    gpr_log(GPR_INFO, "Starting thread: %d", i);
-    gpr_thd_new(&thd_args[i].id, thread_main, &thd_args[i], &options);
-  }
-
-  sleep((unsigned)g_timeout_secs * 2);
-
-  /* Send signals first */
-  for (i = 0; i < NUM_THREADS; i++) {
-    gpr_log(GPR_INFO, "Sending signal to thread: %d", thd_args->thread_num);
-    pthread_kill(thd_args[i].id, g_signal_num);
-    gpr_log(GPR_INFO, "Sent signal to thread: %d >>>>>> ",
-            thd_args->thread_num);
-  }
-
-  sleep((unsigned)g_timeout_secs * 2);
-
-  close_fd(epoll_fd);
-
-  sleep((unsigned)g_timeout_secs * 2);
-
-  eventfd_wakeup(efd);
-  epoll_teardown(epoll_fd, efd);
-
-  for (i = 0; i < NUM_THREADS; i++) {
-    gpr_thd_join(thd_args[i].id);
-    gpr_log(GPR_INFO, "Thread: %d joined", i);
-  }
-
-  return 0;
-}
diff --git a/test/core/network_benchmarks/low_level_ping_pong.c b/test/core/network_benchmarks/low_level_ping_pong.c
index b72a07778e0..1b40895a719 100644
--- a/test/core/network_benchmarks/low_level_ping_pong.c
+++ b/test/core/network_benchmarks/low_level_ping_pong.c
@@ -44,7 +44,6 @@
 #include <poll.h>
 #include <stdio.h>
 #include <string.h>
-#include <signal.h>
 #ifdef __linux__
 #include <sys/epoll.h>
 #endif
@@ -85,7 +84,6 @@ typedef struct thread_args {
 static int read_bytes(int fd, char *buf, size_t read_size, int spin) {
   size_t bytes_read = 0;
   ssize_t err;
-
   do {
     err = read(fd, buf + bytes_read, read_size - bytes_read);
     if (err < 0) {
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index d968278f2a4..21ee1e6ff8a 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -808,7 +808,6 @@ src/core/lib/iomgr/closure.h \
 src/core/lib/iomgr/endpoint.h \
 src/core/lib/iomgr/endpoint_pair.h \
 src/core/lib/iomgr/ev_epoll_linux.h \
-src/core/lib/iomgr/ev_epoll_posix.h \
 src/core/lib/iomgr/ev_poll_posix.h \
 src/core/lib/iomgr/ev_posix.h \
 src/core/lib/iomgr/exec_ctx.h \
@@ -957,7 +956,6 @@ src/core/lib/iomgr/endpoint.c \
 src/core/lib/iomgr/endpoint_pair_posix.c \
 src/core/lib/iomgr/endpoint_pair_windows.c \
 src/core/lib/iomgr/ev_epoll_linux.c \
-src/core/lib/iomgr/ev_epoll_posix.c \
 src/core/lib/iomgr/ev_poll_posix.c \
 src/core/lib/iomgr/ev_posix.c \
 src/core/lib/iomgr/exec_ctx.c \
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index 85b71a8255a..304a0e1e3a9 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -301,22 +301,6 @@
     "third_party": false, 
     "type": "target"
   }, 
-  {
-    "deps": [
-      "gpr", 
-      "gpr_test_util", 
-      "grpc", 
-      "grpc_test_util"
-    ], 
-    "headers": [], 
-    "language": "c", 
-    "name": "epoll_test", 
-    "src": [
-      "test/core/network_benchmarks/epoll_test.c"
-    ], 
-    "third_party": false, 
-    "type": "target"
-  }, 
   {
     "deps": [
       "gpr", 
@@ -5547,7 +5531,6 @@
       "src/core/lib/iomgr/endpoint.h", 
       "src/core/lib/iomgr/endpoint_pair.h", 
       "src/core/lib/iomgr/ev_epoll_linux.h", 
-      "src/core/lib/iomgr/ev_epoll_posix.h", 
       "src/core/lib/iomgr/ev_poll_posix.h", 
       "src/core/lib/iomgr/ev_posix.h", 
       "src/core/lib/iomgr/exec_ctx.h", 
@@ -5649,8 +5632,6 @@
       "src/core/lib/iomgr/endpoint_pair_windows.c", 
       "src/core/lib/iomgr/ev_epoll_linux.c", 
       "src/core/lib/iomgr/ev_epoll_linux.h", 
-      "src/core/lib/iomgr/ev_epoll_posix.c", 
-      "src/core/lib/iomgr/ev_epoll_posix.h", 
       "src/core/lib/iomgr/ev_poll_posix.c", 
       "src/core/lib/iomgr/ev_poll_posix.h", 
       "src/core/lib/iomgr/ev_posix.c", 
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index be7b72f61d2..850f9474aec 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -356,21 +356,6 @@
       "windows"
     ]
   }, 
-  {
-    "args": [], 
-    "ci_platforms": [
-      "linux"
-    ], 
-    "cpu_cost": 1.0, 
-    "exclude_configs": [], 
-    "flaky": false, 
-    "gtest": false, 
-    "language": "c", 
-    "name": "epoll_test", 
-    "platforms": [
-      "linux"
-    ]
-  }, 
   {
     "args": [], 
     "ci_platforms": [
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj b/vsprojects/vcxproj/grpc/grpc.vcxproj
index a67e4d16dad..ce523725e8e 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj
@@ -317,7 +317,6 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint_pair.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_linux.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_poll_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\exec_ctx.h" />
@@ -487,8 +486,6 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_linux.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.c">
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_poll_posix.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_posix.c">
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
index bf9b7dc7dcf..d46676f2296 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
@@ -58,9 +58,6 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_linux.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.c">
-      <Filter>src\core\lib\iomgr</Filter>
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_poll_posix.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
@@ -683,9 +680,6 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_linux.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.h">
-      <Filter>src\core\lib\iomgr</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_poll_posix.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
index afc9a2ca1b2..d4dd428c2db 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
@@ -305,7 +305,6 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\endpoint_pair.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_linux.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_poll_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\exec_ctx.h" />
@@ -453,8 +452,6 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_linux.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.c">
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_poll_posix.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_posix.c">
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index b7507f9a963..d14e7e7ab41 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -61,9 +61,6 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_linux.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.c">
-      <Filter>src\core\lib\iomgr</Filter>
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_poll_posix.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
@@ -581,9 +578,6 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_linux.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_epoll_posix.h">
-      <Filter>src\core\lib\iomgr</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\ev_poll_posix.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>

From 9bc3d2d67f32f4dad8cd1319dd4f3fce48c1abee Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Mon, 6 Jun 2016 10:27:56 -0700
Subject: [PATCH 038/280] Minor comments

---
 src/core/lib/iomgr/ev_epoll_linux.c | 28 +++++++++++++++++-----------
 1 file changed, 17 insertions(+), 11 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 61106faef90..d3abf3bd84f 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -144,10 +144,9 @@ typedef struct polling_island {
 /*******************************************************************************
  * Pollset Declarations
  */
-
 struct grpc_pollset_worker {
   int kicked_specifically;
-  pthread_t pt_id; /* TODO (sreek) - Add an abstraction here */
+  pthread_t pt_id; /* Thread id of this worker */
   struct grpc_pollset_worker *next;
   struct grpc_pollset_worker *prev;
 };
@@ -483,8 +482,7 @@ polling_island *polling_island_merge(polling_island *p, polling_island *q) {
   /* Get locks on both the polling islands */
   polling_island_pair_update_and_lock(&p, &q);
 
-  /* TODO: sreek: Think about this scenario some more. Is it possible ?. what
-   * does it mean, when would this happen  */
+  /* TODO: sreek: Think about this scenario some more */
   if (p == q) {
     /* Nothing needs to be done here */
     gpr_mu_unlock(&p->mu);
@@ -539,7 +537,10 @@ static void polling_island_global_init() {
  * (specifically when a new alarm needs to be triggered earlier than the next
  * alarm 'epoch'). This wakeup_fd gives us something to alert on when such a
  * case occurs. */
-/* TODO: sreek: Right now, this wakes up all pollers */
+
+/* TODO: sreek: Right now, this wakes up all pollers. In future we should make
+ * sure to wake up one polling thread (which can wake up other threads if
+ * needed) */
 grpc_wakeup_fd grpc_global_wakeup_fd;
 
 static grpc_fd *fd_freelist = NULL;
@@ -676,7 +677,6 @@ static int fd_wrapped_fd(grpc_fd *fd) {
 static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
                       grpc_closure *on_done, int *release_fd,
                       const char *reason) {
-  /* TODO(sreek) In ev_poll_posix.c,the lock is acquired a little later. Why? */
   bool is_fd_closed = false;
   gpr_mu_lock(&fd->mu);
   fd->on_done_closure = on_done;
@@ -784,8 +784,9 @@ static void fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
  */
 
 static void sig_handler(int sig_num) {
-  /* TODO: sreek - Remove this expensive log line */
+#ifdef GPRC_EPOLL_DEBUG
   gpr_log(GPR_INFO, "Received signal %d", sig_num);
+#endif
 }
 
 /* Global state management */
@@ -986,7 +987,10 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
 
       if (ep_rv < 0) {
         if (errno != EINTR) {
-          /* TODO (sreek) - Check for bad file descriptor error */
+          /* TODO (sreek) - Do not log an error in case of bad file descriptor
+           * (A bad file descriptor here would just mean that the epoll set was
+           * merged with another epoll set and that the current epoll_fd is
+           * closed) */
           gpr_log(GPR_ERROR, "epoll_pwait() failed: %s", strerror(errno));
         } else {
           gpr_log(GPR_DEBUG, "pollset_work_and_unlock: 0-timeout epoll_wait()");
@@ -1062,7 +1066,9 @@ static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   GPR_TIMER_END("pollset_shutdown", 0);
 }
 
-/* TODO(sreek) Is pollset_shutdown() guranteed to be called before this? */
+/* pollset_shutdown is guaranteed to be called before pollset_destroy. So other
+ * than destroying the mutexes, there is nothing special that needs to be done
+ * here */
 static void pollset_destroy(grpc_pollset *pollset) {
   GPR_ASSERT(!pollset_has_workers(pollset));
   gpr_mu_destroy(&pollset->pi_mu);
@@ -1075,7 +1081,7 @@ static void pollset_reset(grpc_pollset *pollset) {
   pollset->shutting_down = false;
   pollset->finish_shutdown_called = false;
   pollset->kicked_without_pollers = false;
-  /* TODO(sreek) - Should pollset->shutdown closure be set to NULL here? */
+  pollset->shutdown_done = NULL;
   pollset_release_polling_island_locked(pollset);
 }
 
@@ -1149,7 +1155,7 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                            grpc_fd *fd) {
   gpr_log(GPR_DEBUG, "pollset_add_fd: pollset: %p, fd: %d", pollset, fd->fd);
-  /* TODO sreek - Check if we need to get a pollset->mu lock here */
+  /* TODO sreek - Double check if we need to get a pollset->mu lock here */
   gpr_mu_lock(&pollset->pi_mu);
   gpr_mu_lock(&fd->pi_mu);
 

From d627c105847f0d262ce3886fb5b463dc914ddbd7 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Mon, 6 Jun 2016 15:49:32 -0700
Subject: [PATCH 039/280] Fix asan failures (i.e add pollset_global_shutdown),
 remove debug log lines

---
 src/core/lib/iomgr/ev_epoll_linux.c | 76 ++++++++++++++---------------
 1 file changed, 38 insertions(+), 38 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index d3abf3bd84f..0e00d4d216a 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -516,6 +516,21 @@ static void polling_island_global_init() {
   g_pi_freelist = NULL;
 }
 
+static void polling_island_global_shutdown() {
+  polling_island *next;
+  gpr_mu_lock(&g_pi_freelist_mu);
+  gpr_mu_unlock(&g_pi_freelist_mu);
+  while (g_pi_freelist != NULL) {
+    next = g_pi_freelist->next_free;
+    gpr_mu_destroy(&g_pi_freelist->mu);
+    gpr_free(g_pi_freelist->fds);
+    gpr_free(g_pi_freelist);
+    g_pi_freelist = next;
+  }
+
+  gpr_mu_destroy(&g_pi_freelist_mu);
+}
+
 /*******************************************************************************
  * Fd Definitions
  */
@@ -784,7 +799,7 @@ static void fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
  */
 
 static void sig_handler(int sig_num) {
-#ifdef GPRC_EPOLL_DEBUG
+#ifdef GRPC_EPOLL_DEBUG
   gpr_log(GPR_INFO, "Received signal %d", sig_num);
 #endif
 }
@@ -792,7 +807,7 @@ static void sig_handler(int sig_num) {
 /* Global state management */
 static void pollset_global_init(void) {
   grpc_wakeup_fd_init(&grpc_global_wakeup_fd);
-  signal(SIGUSR1, sig_handler);
+  signal(SIGUSR1, sig_handler); /* TODO: sreek - Do not hardcode SIGUSR1 */
 }
 
 static void pollset_global_shutdown(void) {
@@ -840,7 +855,6 @@ static void pollset_kick(grpc_pollset *p,
   grpc_pollset_worker *worker = specific_worker;
   if (worker != NULL) {
     if (worker == GRPC_POLLSET_KICK_BROADCAST) {
-      gpr_log(GPR_DEBUG, "pollset_kick: broadcast!");
       if (pollset_has_workers(p)) {
         GPR_TIMER_BEGIN("pollset_kick.broadcast", 0);
         for (worker = p->root_worker.next; worker != &p->root_worker;
@@ -848,12 +862,10 @@ static void pollset_kick(grpc_pollset *p,
           pthread_kill(worker->pt_id, SIGUSR1);
         }
       } else {
-        gpr_log(GPR_DEBUG, "pollset_kick: (broadcast) Kicked without pollers");
         p->kicked_without_pollers = true;
       }
       GPR_TIMER_END("pollset_kick.broadcast", 0);
     } else {
-      gpr_log(GPR_DEBUG, "pollset_kick: kicked kicked_specifically");
       GPR_TIMER_MARK("kicked_specifically", 0);
       worker->kicked_specifically = true;
       pthread_kill(worker->pt_id, SIGUSR1);
@@ -864,11 +876,9 @@ static void pollset_kick(grpc_pollset *p,
     if (worker != NULL) {
       GPR_TIMER_MARK("finally_kick", 0);
       push_back_worker(p, worker);
-      gpr_log(GPR_DEBUG, "pollset_kick: anonymous kick");
       pthread_kill(worker->pt_id, SIGUSR1);
     } else {
       GPR_TIMER_MARK("kicked_no_pollers", 0);
-      gpr_log(GPR_DEBUG, "pollset_kick: kicked without pollers");
       p->kicked_without_pollers = true;
     }
   }
@@ -941,7 +951,6 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
   struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS];
   int epoll_fd = -1;
   int ep_rv;
-  gpr_log(GPR_DEBUG, "pollset_work_and_unlock: Entering..");
   GPR_TIMER_BEGIN("pollset_work_and_unlock", 0);
 
   /* We need to get the epoll_fd to wait on. The epoll_fd is in inside the
@@ -952,22 +961,27 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
      - pollset->polling_island->mu */
   gpr_mu_lock(&pollset->pi_mu);
 
-  if (pollset->polling_island != NULL) {
-    pollset->polling_island =
-        polling_island_update_and_lock(pollset->polling_island, 1, 0);
-    epoll_fd = pollset->polling_island->epoll_fd;
-    if (pollset->polling_island->fd_cnt == 0) {
-      gpr_log(GPR_DEBUG, "pollset_work_and_unlock: epoll_fd: %d, No other fds",
-              epoll_fd);
-    }
-    for (size_t i = 0; i < pollset->polling_island->fd_cnt; i++) {
-      gpr_log(GPR_DEBUG,
-              "pollset_work_and_unlock: epoll_fd: %d, fd_count: %d, fd[%d]: %d",
-              epoll_fd, pollset->polling_island->fd_cnt, i,
-              pollset->polling_island->fds[i]->fd);
-    }
-    gpr_mu_unlock(&pollset->polling_island->mu);
+  if (pollset->polling_island == NULL) {
+    pollset->polling_island = polling_island_create(NULL, 1);
+  }
+
+  pollset->polling_island =
+      polling_island_update_and_lock(pollset->polling_island, 1, 0);
+  epoll_fd = pollset->polling_island->epoll_fd;
+
+#ifdef GRPC_EPOLL_DEBUG
+  if (pollset->polling_island->fd_cnt == 0) {
+    gpr_log(GPR_DEBUG, "pollset_work_and_unlock: epoll_fd: %d, No other fds",
+            epoll_fd);
+  }
+  for (size_t i = 0; i < pollset->polling_island->fd_cnt; i++) {
+    gpr_log(GPR_DEBUG,
+            "pollset_work_and_unlock: epoll_fd: %d, fd_count: %d, fd[%d]: %d",
+            epoll_fd, pollset->polling_island->fd_cnt, i,
+            pollset->polling_island->fds[i]->fd);
   }
+#endif
+  gpr_mu_unlock(&pollset->polling_island->mu);
 
   gpr_mu_unlock(&pollset->pi_mu);
   gpr_mu_unlock(&pollset->mu);
@@ -975,16 +989,8 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
   /* If epoll_fd == -1, this is a blank pollset and does not have any fds yet */
   if (epoll_fd != -1) {
     do {
-      gpr_timespec before_epoll = gpr_now(GPR_CLOCK_PRECISE);
-      gpr_log(GPR_DEBUG, "pollset_work_and_unlock: epoll_wait()....");
       ep_rv = epoll_pwait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, timeout_ms,
                           sig_mask);
-      gpr_timespec after_epoll = gpr_now(GPR_CLOCK_PRECISE);
-      int dur = gpr_time_to_millis(gpr_time_sub(after_epoll, before_epoll));
-      gpr_log(GPR_DEBUG,
-              "pollset_work_and_unlock: DONE epoll_wait() : %d ms, ep_rv: %d",
-              dur, ep_rv);
-
       if (ep_rv < 0) {
         if (errno != EINTR) {
           /* TODO (sreek) - Do not log an error in case of bad file descriptor
@@ -993,9 +999,7 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
            * closed) */
           gpr_log(GPR_ERROR, "epoll_pwait() failed: %s", strerror(errno));
         } else {
-          gpr_log(GPR_DEBUG, "pollset_work_and_unlock: 0-timeout epoll_wait()");
           ep_rv = epoll_wait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, 0);
-          gpr_log(GPR_DEBUG, "pollset_work_and_unlock: ep_rv: %d", ep_rv);
         }
       }
 
@@ -1018,7 +1022,6 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
       }
     } while (ep_rv == GRPC_EPOLL_MAX_EVENTS);
   }
-  gpr_log(GPR_DEBUG, "pollset_work_and_unlock: Leaving..");
   GPR_TIMER_END("pollset_work_and_unlock", 0);
 }
 
@@ -1093,7 +1096,6 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                          grpc_pollset_worker **worker_hdl, gpr_timespec now,
                          gpr_timespec deadline) {
   GPR_TIMER_BEGIN("pollset_work", 0);
-  gpr_log(GPR_DEBUG, "pollset_work: enter");
   int timeout_ms = poll_deadline_to_millis_timeout(deadline, now);
 
   sigset_t new_mask;
@@ -1112,7 +1114,6 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
        work that needs attention like an event on the completion queue or an
        alarm */
     GPR_TIMER_MARK("pollset_work.kicked_without_pollers", 0);
-    gpr_log(GPR_INFO, "pollset_work: kicked without pollers..");
     pollset->kicked_without_pollers = 0;
   } else if (!pollset->shutting_down) {
     sigemptyset(&new_mask);
@@ -1147,14 +1148,12 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
     gpr_mu_lock(&pollset->mu);
   }
 
-  gpr_log(GPR_DEBUG, "pollset_work(): leaving");
   *worker_hdl = NULL;
   GPR_TIMER_END("pollset_work", 0);
 }
 
 static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                            grpc_fd *fd) {
-  gpr_log(GPR_DEBUG, "pollset_add_fd: pollset: %p, fd: %d", pollset, fd->fd);
   /* TODO sreek - Double check if we need to get a pollset->mu lock here */
   gpr_mu_lock(&pollset->pi_mu);
   gpr_mu_lock(&fd->pi_mu);
@@ -1347,6 +1346,7 @@ static void pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx,
 static void shutdown_engine(void) {
   fd_global_shutdown();
   pollset_global_shutdown();
+  polling_island_global_shutdown();
 }
 
 static const grpc_event_engine_vtable vtable = {

From e5012bac7a57df6b1993a1eaa9b8b3c4d7671975 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Mon, 6 Jun 2016 16:01:45 -0700
Subject: [PATCH 040/280] Remove redundant code

---
 src/core/lib/iomgr/ev_epoll_linux.c | 61 ++++++++++++++---------------
 1 file changed, 29 insertions(+), 32 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 0e00d4d216a..f7ac4ae1ff4 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -986,42 +986,39 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
   gpr_mu_unlock(&pollset->pi_mu);
   gpr_mu_unlock(&pollset->mu);
 
-  /* If epoll_fd == -1, this is a blank pollset and does not have any fds yet */
-  if (epoll_fd != -1) {
-    do {
-      ep_rv = epoll_pwait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, timeout_ms,
-                          sig_mask);
-      if (ep_rv < 0) {
-        if (errno != EINTR) {
-          /* TODO (sreek) - Do not log an error in case of bad file descriptor
-           * (A bad file descriptor here would just mean that the epoll set was
-           * merged with another epoll set and that the current epoll_fd is
-           * closed) */
-          gpr_log(GPR_ERROR, "epoll_pwait() failed: %s", strerror(errno));
-        } else {
-          ep_rv = epoll_wait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, 0);
-        }
+  do {
+    ep_rv = epoll_pwait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, timeout_ms,
+                        sig_mask);
+    if (ep_rv < 0) {
+      if (errno != EINTR) {
+        /* TODO (sreek) - Do not log an error in case of bad file descriptor
+         * (A bad file descriptor here would just mean that the epoll set was
+         * merged with another epoll set and that the current epoll_fd is
+         * closed) */
+        gpr_log(GPR_ERROR, "epoll_pwait() failed: %s", strerror(errno));
+      } else {
+        ep_rv = epoll_wait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, 0);
       }
+    }
 
-      int i;
-      for (i = 0; i < ep_rv; ++i) {
-        grpc_fd *fd = ep_ev[i].data.ptr;
-        int cancel = ep_ev[i].events & (EPOLLERR | EPOLLHUP);
-        int read_ev = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
-        int write_ev = ep_ev[i].events & EPOLLOUT;
-        if (fd == NULL) {
-          grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
-        } else {
-          if (read_ev || cancel) {
-            fd_become_readable(exec_ctx, fd);
-          }
-          if (write_ev || cancel) {
-            fd_become_writable(exec_ctx, fd);
-          }
+    int i;
+    for (i = 0; i < ep_rv; ++i) {
+      grpc_fd *fd = ep_ev[i].data.ptr;
+      int cancel = ep_ev[i].events & (EPOLLERR | EPOLLHUP);
+      int read_ev = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
+      int write_ev = ep_ev[i].events & EPOLLOUT;
+      if (fd == NULL) {
+        grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
+      } else {
+        if (read_ev || cancel) {
+          fd_become_readable(exec_ctx, fd);
+        }
+        if (write_ev || cancel) {
+          fd_become_writable(exec_ctx, fd);
         }
       }
-    } while (ep_rv == GRPC_EPOLL_MAX_EVENTS);
-  }
+    }
+  } while (ep_rv == GRPC_EPOLL_MAX_EVENTS);
   GPR_TIMER_END("pollset_work_and_unlock", 0);
 }
 

From ad162ba5a9f91481b71f233d1f4f8c15b01de644 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Mon, 6 Jun 2016 16:23:37 -0700
Subject: [PATCH 041/280] Core review comments and remove 'kicked_specifically'
 field as its not needed

---
 src/core/lib/iomgr/ev_epoll_linux.c | 21 ++++++++-------------
 1 file changed, 8 insertions(+), 13 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index f7ac4ae1ff4..d5aac96fa46 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -145,7 +145,6 @@ typedef struct polling_island {
  * Pollset Declarations
  */
 struct grpc_pollset_worker {
-  int kicked_specifically;
   pthread_t pt_id; /* Thread id of this worker */
   struct grpc_pollset_worker *next;
   struct grpc_pollset_worker *prev;
@@ -235,18 +234,16 @@ static void polling_island_remove_all_fds_locked(polling_island *pi,
   size_t i;
 
   for (i = 0; i < pi->fd_cnt; i++) {
-    if (remove_fd_refs) {
-      GRPC_FD_UNREF(pi->fds[i], "polling_island");
-    }
-
     err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_DEL, pi->fds[i]->fd, NULL);
     if (err < 0 && errno != ENOENT) {
-      gpr_log(GPR_ERROR,
-              "epoll_ctl delete for fds[i]: %d failed with error: %s", i,
-              pi->fds[i]->fd, strerror(errno));
       /* TODO: sreek - We need a better way to bubble up this error instead of
-       * just logging a message */
-      continue;
+      * just logging a message */
+      gpr_log(GPR_ERROR, "epoll_ctl deleting fds[%d]: %d failed with error: %s",
+              i, pi->fds[i]->fd, strerror(errno));
+    }
+
+    if (remove_fd_refs) {
+      GRPC_FD_UNREF(pi->fds[i], "polling_island");
     }
   }
 
@@ -264,7 +261,7 @@ static void polling_island_remove_fd_locked(polling_island *pi, grpc_fd *fd,
   if (!is_fd_closed) {
     err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_DEL, fd->fd, NULL);
     if (err < 0 && errno != ENOENT) {
-      gpr_log(GPR_ERROR, "epoll_ctl delete for fd: %d failed with error; %s",
+      gpr_log(GPR_ERROR, "epoll_ctl deleting fd: %d failed with error; %s",
               fd->fd, strerror(errno));
     }
   }
@@ -867,7 +864,6 @@ static void pollset_kick(grpc_pollset *p,
       GPR_TIMER_END("pollset_kick.broadcast", 0);
     } else {
       GPR_TIMER_MARK("kicked_specifically", 0);
-      worker->kicked_specifically = true;
       pthread_kill(worker->pt_id, SIGUSR1);
     }
   } else {
@@ -1100,7 +1096,6 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 
   grpc_pollset_worker worker;
   worker.next = worker.prev = NULL;
-  worker.kicked_specifically = 0;
   worker.pt_id = pthread_self();
 
   *worker_hdl = &worker;

From 5855c478c69508f000baa4878f515d72b5f5a1e9 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Wed, 8 Jun 2016 12:56:56 -0700
Subject: [PATCH 042/280] Use poll if not linux, add read notifier pollset
 support and some groundwork for adding API that allows users to register
 custom kick signal number

---
 include/grpc/impl/codegen/port_platform.h |  1 +
 src/core/lib/iomgr/ev_epoll_linux.c       | 72 ++++++++++++++++-------
 src/core/lib/iomgr/ev_posix.c             |  2 +-
 3 files changed, 54 insertions(+), 21 deletions(-)

diff --git a/include/grpc/impl/codegen/port_platform.h b/include/grpc/impl/codegen/port_platform.h
index be4215a54bf..7a6ec53fb4c 100644
--- a/include/grpc/impl/codegen/port_platform.h
+++ b/include/grpc/impl/codegen/port_platform.h
@@ -189,6 +189,7 @@
 #define GPR_GCC_ATOMIC 1
 #define GPR_GCC_TLS 1
 #define GPR_LINUX 1
+#define GPR_LINUX_EPOLL 1
 #define GPR_LINUX_LOG
 #define GPR_LINUX_MULTIPOLL_WITH_EPOLL 1
 #define GPR_POSIX_WAKEUP_FD 1
diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index d5aac96fa46..69ab665e155 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -33,7 +33,7 @@
 
 #include <grpc/support/port_platform.h>
 
-#ifdef GPR_POSIX_SOCKET
+#ifdef GPR_LINUX_EPOLL
 
 #include "src/core/lib/iomgr/ev_epoll_linux.h"
 
@@ -60,6 +60,8 @@
 
 struct polling_island;
 
+static int grpc_poller_kick_signum;
+
 /*******************************************************************************
  * Fd Declarations
  */
@@ -92,6 +94,9 @@ struct grpc_fd {
   struct grpc_fd *freelist_next;
   grpc_closure *on_done_closure;
 
+  /* The pollset that last noticed that the fd is readable */
+  grpc_pollset *read_notifier_pollset;
+
   grpc_iomgr_object iomgr_object;
 };
 
@@ -650,14 +655,15 @@ static grpc_fd *fd_create(int fd, const char *name) {
   gpr_mu_lock(&new_fd->mu);
 
   gpr_atm_rel_store(&new_fd->refst, 1);
+  new_fd->fd = fd;
   new_fd->shutdown = false;
+  new_fd->orphaned = false;
   new_fd->read_closure = CLOSURE_NOT_READY;
   new_fd->write_closure = CLOSURE_NOT_READY;
-  new_fd->fd = fd;
   new_fd->polling_island = NULL;
   new_fd->freelist_next = NULL;
   new_fd->on_done_closure = NULL;
-  new_fd->orphaned = false;
+  new_fd->read_notifier_pollset = NULL;
 
   gpr_mu_unlock(&new_fd->mu);
 
@@ -765,6 +771,17 @@ static int set_ready_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
   }
 }
 
+static grpc_pollset *fd_get_read_notifier_pollset(grpc_exec_ctx *exec_ctx,
+                                                  grpc_fd *fd) {
+  grpc_pollset *notifier = NULL;
+
+  gpr_mu_lock(&fd->mu);
+  notifier = fd->read_notifier_pollset;
+  gpr_mu_unlock(&fd->mu);
+
+  return notifier;
+}
+
 static void fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
   gpr_mu_lock(&fd->mu);
   GPR_ASSERT(!fd->shutdown);
@@ -801,16 +818,25 @@ static void sig_handler(int sig_num) {
 #endif
 }
 
+static void poller_kick_init() {
+  grpc_poller_kick_signum = SIGRTMIN + 2;
+  signal(grpc_poller_kick_signum, sig_handler);
+}
+
 /* Global state management */
 static void pollset_global_init(void) {
   grpc_wakeup_fd_init(&grpc_global_wakeup_fd);
-  signal(SIGUSR1, sig_handler); /* TODO: sreek - Do not hardcode SIGUSR1 */
+  poller_kick_init();
 }
 
 static void pollset_global_shutdown(void) {
   grpc_wakeup_fd_destroy(&grpc_global_wakeup_fd);
 }
 
+static void pollset_worker_kick(grpc_pollset_worker *worker) {
+  pthread_kill(worker->pt_id, grpc_poller_kick_signum);
+}
+
 /* Return 1 if the pollset has active threads in pollset_work (pollset must
  * be locked) */
 static int pollset_has_workers(grpc_pollset *p) {
@@ -856,7 +882,7 @@ static void pollset_kick(grpc_pollset *p,
         GPR_TIMER_BEGIN("pollset_kick.broadcast", 0);
         for (worker = p->root_worker.next; worker != &p->root_worker;
              worker = worker->next) {
-          pthread_kill(worker->pt_id, SIGUSR1);
+          pollset_worker_kick(worker);
         }
       } else {
         p->kicked_without_pollers = true;
@@ -864,7 +890,7 @@ static void pollset_kick(grpc_pollset *p,
       GPR_TIMER_END("pollset_kick.broadcast", 0);
     } else {
       GPR_TIMER_MARK("kicked_specifically", 0);
-      pthread_kill(worker->pt_id, SIGUSR1);
+      pollset_worker_kick(worker);
     }
   } else {
     GPR_TIMER_MARK("kick_anonymous", 0);
@@ -872,7 +898,7 @@ static void pollset_kick(grpc_pollset *p,
     if (worker != NULL) {
       GPR_TIMER_MARK("finally_kick", 0);
       push_back_worker(p, worker);
-      pthread_kill(worker->pt_id, SIGUSR1);
+      pollset_worker_kick(worker);
     } else {
       GPR_TIMER_MARK("kicked_no_pollers", 0);
       p->kicked_without_pollers = true;
@@ -924,20 +950,20 @@ static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
       timeout, gpr_time_from_nanos(GPR_NS_PER_MS - 1, GPR_TIMESPAN)));
 }
 
-static void set_ready(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure **st) {
-  /* only one set_ready can be active at once (but there may be a racing
-     notify_on) */
+static void fd_become_readable(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                               grpc_pollset *notifier) {
+  /* Need the fd->mu since we might be racing with fd_notify_on_read */
   gpr_mu_lock(&fd->mu);
-  set_ready_locked(exec_ctx, fd, st);
+  set_ready_locked(exec_ctx, fd, &fd->read_closure);
+  fd->read_notifier_pollset = notifier;
   gpr_mu_unlock(&fd->mu);
 }
 
-static void fd_become_readable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
-  set_ready(exec_ctx, fd, &fd->read_closure);
-}
-
 static void fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
-  set_ready(exec_ctx, fd, &fd->write_closure);
+  /* Need the fd->mu since we might be racing with fd_notify_on_write */
+  gpr_mu_lock(&fd->mu);
+  set_ready_locked(exec_ctx, fd, &fd->write_closure);
+  gpr_mu_unlock(&fd->mu);
 }
 
 #define GRPC_EPOLL_MAX_EVENTS 1000
@@ -1007,7 +1033,7 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
         grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
       } else {
         if (read_ev || cancel) {
-          fd_become_readable(exec_ctx, fd);
+          fd_become_readable(exec_ctx, fd, pollset);
         }
         if (write_ev || cancel) {
           fd_become_writable(exec_ctx, fd);
@@ -1109,9 +1135,9 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
     pollset->kicked_without_pollers = 0;
   } else if (!pollset->shutting_down) {
     sigemptyset(&new_mask);
-    sigaddset(&new_mask, SIGUSR1);
+    sigaddset(&new_mask, grpc_poller_kick_signum);
     pthread_sigmask(SIG_BLOCK, &new_mask, &orig_mask);
-    sigdelset(&orig_mask, SIGUSR1);
+    sigdelset(&orig_mask, grpc_poller_kick_signum);
 
     push_front_worker(pollset, &worker);
 
@@ -1350,6 +1376,7 @@ static const grpc_event_engine_vtable vtable = {
     .fd_shutdown = fd_shutdown,
     .fd_notify_on_read = fd_notify_on_read,
     .fd_notify_on_write = fd_notify_on_write,
+    .fd_get_read_notifier_pollset = fd_get_read_notifier_pollset,
 
     .pollset_init = pollset_init,
     .pollset_shutdown = pollset_shutdown,
@@ -1380,4 +1407,9 @@ const grpc_event_engine_vtable *grpc_init_epoll_linux(void) {
   return &vtable;
 }
 
-#endif
+#else /* defined(GPR_LINUX_EPOLL) */
+/* If GPR_LINUX_EPOLL is not defined, it means epoll is not available. Return
+ * NULL */
+const grpc_event_engine_vtable *grpc_init_epoll_linux(void) { return NULL; }
+
+#endif /* !defined(GPR_LINUX_EPOLL) */
diff --git a/src/core/lib/iomgr/ev_posix.c b/src/core/lib/iomgr/ev_posix.c
index e0c3558a51e..2b15967adcc 100644
--- a/src/core/lib/iomgr/ev_posix.c
+++ b/src/core/lib/iomgr/ev_posix.c
@@ -63,8 +63,8 @@ typedef struct {
 } event_engine_factory;
 
 static const event_engine_factory g_factories[] = {
-    {"poll", grpc_init_poll_posix},
     {"epoll", grpc_init_epoll_linux},
+    {"poll", grpc_init_poll_posix},
     {"legacy", grpc_init_poll_and_epoll_posix},
 };
 

From 485cf40ab7d68b2624a5ab3be3842444f5835f14 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Wed, 8 Jun 2016 13:35:25 -0700
Subject: [PATCH 043/280] Fixed wrong spec and reworked streaming compressed
 case

---
 doc/interop-test-descriptions.md   | 36 +++++++++++-------------------
 test/cpp/interop/interop_client.cc | 17 ++++++++------
 2 files changed, 23 insertions(+), 30 deletions(-)

diff --git a/doc/interop-test-descriptions.md b/doc/interop-test-descriptions.md
index 7fd21c7022e..6a76acd3a89 100644
--- a/doc/interop-test-descriptions.md
+++ b/doc/interop-test-descriptions.md
@@ -224,7 +224,7 @@ Procedure:
         size: 31415
       }
       response_parameters:{
-        size: 59
+        size: 9
       }
       response_parameters:{
         size: 2653
@@ -261,20 +261,19 @@ Procedure:
       request_compressed_response: bool
       response_type:COMPRESSABLE
       response_parameters:{
-        size: 31415
-      }
-      response_parameters:{
-        size: 59
-      }
-      response_parameters:{
-        size: 2653
+        size: 31424
       }
       response_parameters:{
-        size: 58979
+        size: 61632
       }
     }
     ```
 
+    Note that the `response_parameters` sizes are the sum of the usual streaming
+    response sizes (31415, 9, 2653, 58979) taken in successive pairs. This way,
+    we only keep a single list of sizes while making sure the individual message
+    sizes are large enough to trigger compression in all implementations.
+
     Client asserts:
     * call was successful
     * exactly four responses
@@ -283,7 +282,7 @@ Procedure:
       NOT have the compressed message flag set.
     * if `request_compressed_response` is true, the response's messages MUST
       have the compressed message flag set.
-    * response payload bodies are sized (in order): 31415, 59, 2653, 58979
+    * response payload bodies are sized (in order): 31424, 61632
     * clients are free to assert that the response payload body contents are
       zero and comparing the entire response messages against golden responses
 
@@ -295,16 +294,10 @@ Procedure:
       request_compressed_response: bool
       response_type:UNCOMPRESSABLE
       response_parameters:{
-        size: 31415
-      }
-      response_parameters:{
-        size: 59
-      }
-      response_parameters:{
-        size: 2653
+        size: 31424
       }
       response_parameters:{
-        size: 58979
+        size: 61632
       }
     }
     ```
@@ -316,10 +309,7 @@ Procedure:
     * the response MAY have the compressed message flag set. Some
       implementations will choose to compress the payload even when the output
       size if larger than the input.
-    * response payload bodies are sized (in order): 31415, 59, 2653, 58979
-    * clients are free to assert that the body of the responses are identical to
-      the golden uncompressable data at `test/cpp/interop/rnd.dat`.
-
+    * response payload bodies are sized (in order): 31424, 61632
 
 ### ping_pong
 
@@ -350,7 +340,7 @@ Procedure:
     {
       response_type: COMPRESSABLE
       response_parameters:{
-        size: 59
+        size: 9
       }
       payload:{
         body: 8 bytes of zeros
diff --git a/test/cpp/interop/interop_client.cc b/test/cpp/interop/interop_client.cc
index a0479e8f689..7705bb15922 100644
--- a/test/cpp/interop/interop_client.cc
+++ b/test/cpp/interop/interop_client.cc
@@ -58,7 +58,7 @@ namespace testing {
 namespace {
 // The same value is defined by the Java client.
 const std::vector<int> request_stream_sizes = {27182, 8, 1828, 45904};
-const std::vector<int> response_stream_sizes = {31415, 59, 2653, 58979};
+const std::vector<int> response_stream_sizes = {31415, 9, 2653, 58979};
 const int kNumResponseMessages = 2000;
 const int kResponseMessageSize = 1030;
 const int kReceiveDelayMilliSeconds = 20;
@@ -466,10 +466,11 @@ bool InteropClient::DoResponseCompressedStreaming() {
       request.set_response_type(payload_types[i]);
       request.set_request_compressed_response(request_compression[j]);
 
-      for (size_t k = 0; k < response_stream_sizes.size(); ++k) {
+      for (size_t k = 0; k < response_stream_sizes.size() / 2; ++k) {
         ResponseParameters* response_parameter =
             request.add_response_parameters();
-        response_parameter->set_size(response_stream_sizes[k]);
+        response_parameter->set_size(response_stream_sizes[k] +
+                                     response_stream_sizes[k + 1]);
       }
       StreamingOutputCallResponse response;
 
@@ -483,7 +484,9 @@ bool InteropClient::DoResponseCompressedStreaming() {
         switch (response.payload().type()) {
           case PayloadType::COMPRESSABLE:
             GPR_ASSERT(response.payload().body() ==
-                       grpc::string(response_stream_sizes[k], '\0'));
+                       grpc::string(response_stream_sizes[k] +
+                                        response_stream_sizes[k + 1],
+                                    '\0'));
             break;
           case PayloadType::UNCOMPRESSABLE:
             break;
@@ -513,14 +516,14 @@ bool InteropClient::DoResponseCompressedStreaming() {
       gpr_log(GPR_DEBUG, "Response streaming done %s.", log_suffix);
       gpr_free(log_suffix);
 
-      if (k < response_stream_sizes.size()) {
+      if (k < response_stream_sizes.size() / 2) {
         // stream->Read() failed before reading all the expected messages. This
         // is most likely due to a connection failure.
         gpr_log(GPR_ERROR,
                 "DoResponseCompressedStreaming(): Responses read (k=%d) is "
                 "less than the expected messages (i.e "
-                "response_stream_sizes.size() (%d)). (i=%d, j=%d)",
-                k, response_stream_sizes.size(), i, j);
+                "response_stream_sizes.size()/2 (%d)). (i=%d, j=%d)",
+                k, response_stream_sizes.size() / 2, i, j);
         return TransientFailureOrAbort();
       }
 

From 9065c8b1df3a106947eab71db678e2506aa4af5d Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Wed, 8 Jun 2016 14:31:21 -0700
Subject: [PATCH 044/280] more changes after offline chat with ejona

---
 doc/interop-test-descriptions.md | 85 ++++++++------------------------
 1 file changed, 20 insertions(+), 65 deletions(-)

diff --git a/doc/interop-test-descriptions.md b/doc/interop-test-descriptions.md
index 6a76acd3a89..63b0022c3f6 100644
--- a/doc/interop-test-descriptions.md
+++ b/doc/interop-test-descriptions.md
@@ -90,11 +90,11 @@ Client asserts:
 * clients are free to assert that the response payload body contents are zero
   and comparing the entire response message against a golden response
 
-### large_compressed_unary
+### server_compressed_unary
 
-This test verifies compressed unary calls succeed in sending messages. It
-sends one unary request for every payload type, with and without requesting a
-compressed response from the server.
+This test verifies compressed server-only unary calls succeed in sending
+messages. It sends one unary request for every payload type, with and without
+requesting a compressed response from the server.
 
 In all scenarios, whether compression was actually performed is determined by
 the compression bit in the response's message flags.
@@ -103,7 +103,6 @@ the compression bit in the response's message flags.
 Server features:
 * [UnaryCall][]
 * [Compressable Payload][]
-* [Uncompressable Payload][]
 
 Procedure:
  1. Client calls UnaryCall with:
@@ -130,26 +129,6 @@ Procedure:
       zero and comparing the entire response message against a golden response
 
 
- 2. Client calls UnaryCall with:
-    ```
-    {
-      request_compressed_response: bool
-      response_type: UNCOMPRESSABLE
-      response_size: 314159
-      payload:{
-        body: 271828 bytes of zeros
-      }
-    }
-    ```
-    Client asserts:
-    * call was successful
-    * response payload type is UNCOMPRESSABLE
-    * the response MAY have the compressed message flag set. Some
-      implementations will choose to compress the payload even when the output
-      size if larger than the input.
-    * response payload body is 314159 bytes in size
-
-
 ### client_streaming
 
 This test verifies that client-only streaming succeeds.
@@ -250,7 +229,6 @@ This test verifies that server-only compressed streaming succeeds.
 Server features:
 * [StreamingOutputCall][]
 * [Compressable Payload][]
-* [Uncompressable Payload][]
 
 
 Procedure:
@@ -258,46 +236,26 @@ Procedure:
 
     ```
     {
-      request_compressed_response: bool
+      request_compressed_response: true
       response_type:COMPRESSABLE
       response_parameters:{
-        size: 31424
+        size: 31415
       }
       response_parameters:{
-        size: 61632
+        size: 58979
       }
     }
     ```
 
-    Note that the `response_parameters` sizes are the sum of the usual streaming
-    response sizes (31415, 9, 2653, 58979) taken in successive pairs. This way,
-    we only keep a single list of sizes while making sure the individual message
-    sizes are large enough to trigger compression in all implementations.
-
-    Client asserts:
-    * call was successful
-    * exactly four responses
-    * response payloads are COMPRESSABLE
-    * if `request_compressed_response` is false, the response's messages MUST
-      NOT have the compressed message flag set.
-    * if `request_compressed_response` is true, the response's messages MUST
-      have the compressed message flag set.
-    * response payload bodies are sized (in order): 31424, 61632
-    * clients are free to assert that the response payload body contents are
-      zero and comparing the entire response messages against golden responses
-
-
- 2. Client calls StreamingOutputCall with:
-
     ```
     {
-      request_compressed_response: bool
-      response_type:UNCOMPRESSABLE
+      request_compressed_response: false
+      response_type:COMPRESSABLE
       response_parameters:{
-        size: 31424
+        size: 31415
       }
       response_parameters:{
-        size: 61632
+        size: 58979
       }
     }
     ```
@@ -305,11 +263,15 @@ Procedure:
     Client asserts:
     * call was successful
     * exactly four responses
-    * response payloads are UNCOMPRESSABLE
-    * the response MAY have the compressed message flag set. Some
-      implementations will choose to compress the payload even when the output
-      size if larger than the input.
-    * response payload bodies are sized (in order): 31424, 61632
+    * response payloads are COMPRESSABLE
+    * if `request_compressed_response` is false, the response's messages MUST
+      NOT have the compressed message flag set.
+    * if `request_compressed_response` is true, the response's messages MUST
+      have the compressed message flag set.
+    * response payload bodies are sized (in order): 31415, 58979
+    * clients are free to assert that the response payload body contents are
+      zero and comparing the entire response messages against golden responses
+
 
 ### ping_pong
 
@@ -910,13 +872,6 @@ When the client requests COMPRESSABLE payload, the response includes a payload
 of the size requested containing all zeros and the payload type is
 COMPRESSABLE.
 
-### Uncompressable Payload
-[Uncompressable Payload]: #uncompressable-payload
-
-When the client requests UNCOMPRESSABLE payload, the response includes a payload
-of the size requested containing uncompressable data and the payload type is
-UNCOMPRESSABLE.
-
 ### Echo Status
 [Echo Status]: #echo-status
 When the client sends a response_status in the request payload, the server closes

From 24b1062f42ef01bd47a458e94423f068ec1765f0 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Wed, 8 Jun 2016 15:20:17 -0700
Subject: [PATCH 045/280] Do not close epoll_fd while there are any pollers and
 add the ability to wake up all pollers when an island is merged

---
 src/core/lib/iomgr/ev_epoll_linux.c | 113 ++++++++++++++++++++--------
 1 file changed, 80 insertions(+), 33 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 69ab665e155..3a3c136a5aa 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -190,9 +190,18 @@ struct grpc_pollset_set {
 };
 
 /*******************************************************************************
- * Polling-island Definitions
+ * Polling island Definitions
  */
 
+/* The wakeup fd that is used to wake up all threads in a Polling island. This
+   is useful in the polling island merge operation where we need to wakeup all
+   the threads currently polling the smaller polling island (so that they can
+   start polling the new/merged polling island)
+
+   NOTE: This fd is initialized to be readable and MUST NOT be consumed i.e the
+   threads that woke up MUST NOT call grpc_wakeup_fd_consume_wakeup() */
+static grpc_wakeup_fd polling_island_wakeup_fd;
+
 /* Polling island freelist */
 static gpr_mu g_pi_freelist_mu;
 static polling_island *g_pi_freelist = NULL;
@@ -232,6 +241,25 @@ static void polling_island_add_fds_locked(polling_island *pi, grpc_fd **fds,
   }
 }
 
+/* The caller is expected to hold pi->mu before calling this */
+static void polling_island_add_wakeup_fd_locked(polling_island *pi,
+                                                grpc_wakeup_fd *wakeup_fd) {
+  struct epoll_event ev;
+  int err;
+
+  ev.events = (uint32_t)(EPOLLIN | EPOLLET);
+  ev.data.ptr = wakeup_fd;
+  err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_ADD,
+                  GRPC_WAKEUP_FD_GET_READ_FD(wakeup_fd), &ev);
+  if (err < 0) {
+    gpr_log(GPR_ERROR,
+            "Failed to add grpc_wake_up_fd (%d) to the epoll set (epoll_fd: %d)"
+            ". Error: %s",
+            GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd), pi->epoll_fd,
+            strerror(errno));
+  }
+}
+
 /* The caller is expected to hold pi->mu lock before calling this function */
 static void polling_island_remove_all_fds_locked(polling_island *pi,
                                                  bool remove_fd_refs) {
@@ -283,8 +311,6 @@ static void polling_island_remove_fd_locked(polling_island *pi, grpc_fd *fd,
 static polling_island *polling_island_create(grpc_fd *initial_fd,
                                              int initial_ref_cnt) {
   polling_island *pi = NULL;
-  struct epoll_event ev;
-  int err;
 
   /* Try to get one from the polling island freelist */
   gpr_mu_lock(&g_pi_freelist_mu);
@@ -311,17 +337,7 @@ static polling_island *polling_island_create(grpc_fd *initial_fd,
   }
   GPR_ASSERT(pi->epoll_fd >= 0);
 
-  ev.events = (uint32_t)(EPOLLIN | EPOLLET);
-  ev.data.ptr = NULL;
-  err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_ADD,
-                  GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd), &ev);
-  if (err < 0) {
-    gpr_log(GPR_ERROR,
-            "Failed to add grpc_global_wake_up_fd (%d) to the epoll set "
-            "(epoll_fd: %d) with error: %s",
-            GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd), pi->epoll_fd,
-            strerror(errno));
-  }
+  polling_island_add_wakeup_fd_locked(pi, &grpc_global_wakeup_fd);
 
   pi->ref_cnt = initial_ref_cnt;
   pi->merged_to = NULL;
@@ -496,13 +512,15 @@ polling_island *polling_island_merge(polling_island *p, polling_island *q) {
     GPR_SWAP(polling_island *, p, q);
   }
 
-  /* "Merge" p with q i.e move all the fds from p (the polling_island with fewer
-     fds) to q.
-     Note: Not altering the ref counts on the affected fds here because they
-     would effectively remain unchanged */
+  /* "Merge" p with q i.e move all the fds from p (The one with fewer fds) to q
+      )Note that the refcounts on the fds being moved will not change here. This
+      is why the last parameter in the following two functions is 'false') */
   polling_island_add_fds_locked(q, p->fds, p->fd_cnt, false);
   polling_island_remove_all_fds_locked(p, false);
 
+  /* Wakeup all the pollers (if any) on p so that they can pickup this change */
+  polling_island_add_wakeup_fd_locked(p, &polling_island_wakeup_fd);
+
   /* The merged polling island inherits all the ref counts of the island merging
      with it */
   q->ref_cnt += p->ref_cnt;
@@ -516,6 +534,8 @@ polling_island *polling_island_merge(polling_island *p, polling_island *q) {
 static void polling_island_global_init() {
   gpr_mu_init(&g_pi_freelist_mu);
   g_pi_freelist = NULL;
+  grpc_wakeup_fd_init(&polling_island_wakeup_fd);
+  grpc_wakeup_fd_wakeup(&polling_island_wakeup_fd);
 }
 
 static void polling_island_global_shutdown() {
@@ -529,8 +549,9 @@ static void polling_island_global_shutdown() {
     gpr_free(g_pi_freelist);
     g_pi_freelist = next;
   }
-
   gpr_mu_destroy(&g_pi_freelist_mu);
+
+  grpc_wakeup_fd_destroy(&polling_island_wakeup_fd);
 }
 
 /*******************************************************************************
@@ -973,6 +994,7 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
   struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS];
   int epoll_fd = -1;
   int ep_rv;
+  polling_island *pi = NULL;
   GPR_TIMER_BEGIN("pollset_work_and_unlock", 0);
 
   /* We need to get the epoll_fd to wait on. The epoll_fd is in inside the
@@ -983,13 +1005,19 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
      - pollset->polling_island->mu */
   gpr_mu_lock(&pollset->pi_mu);
 
-  if (pollset->polling_island == NULL) {
-    pollset->polling_island = polling_island_create(NULL, 1);
+  pi = pollset->polling_island;
+  if (pi == NULL) {
+    pi = polling_island_create(NULL, 1);
   }
 
-  pollset->polling_island =
-      polling_island_update_and_lock(pollset->polling_island, 1, 0);
-  epoll_fd = pollset->polling_island->epoll_fd;
+  /* In addition to locking the polling island, add a ref so that the island
+     does not get destroyed (which means the epoll_fd won't be closed) while
+     we are are doing an epoll_wait() on the epoll_fd */
+  pi = polling_island_update_and_lock(pi, 1, 1);
+  epoll_fd = pi->epoll_fd;
+
+  /* Update the pollset->polling_island */
+  pollset->polling_island = pi;
 
 #ifdef GRPC_EPOLL_DEBUG
   if (pollset->polling_island->fd_cnt == 0) {
@@ -1013,25 +1041,29 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
                         sig_mask);
     if (ep_rv < 0) {
       if (errno != EINTR) {
-        /* TODO (sreek) - Do not log an error in case of bad file descriptor
-         * (A bad file descriptor here would just mean that the epoll set was
-         * merged with another epoll set and that the current epoll_fd is
-         * closed) */
         gpr_log(GPR_ERROR, "epoll_pwait() failed: %s", strerror(errno));
       } else {
+        /* We were interrupted. Save an interation by doing a zero timeout
+           epoll_wait to see if there are any other events of interest */
         ep_rv = epoll_wait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, 0);
       }
     }
 
     int i;
     for (i = 0; i < ep_rv; ++i) {
-      grpc_fd *fd = ep_ev[i].data.ptr;
-      int cancel = ep_ev[i].events & (EPOLLERR | EPOLLHUP);
-      int read_ev = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
-      int write_ev = ep_ev[i].events & EPOLLOUT;
-      if (fd == NULL) {
+      void *data_ptr = ep_ev[i].data.ptr;
+      if (data_ptr == &grpc_global_wakeup_fd) {
         grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
+      } else if (data_ptr == &polling_island_wakeup_fd) {
+        /* This means that our polling island is merged with a different
+           island. We do not have to do anything here since the subsequent call
+           to the function pollset_work_and_unlock() will pick up the correct
+           epoll_fd */
       } else {
+        grpc_fd *fd = data_ptr;
+        int cancel = ep_ev[i].events & (EPOLLERR | EPOLLHUP);
+        int read_ev = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
+        int write_ev = ep_ev[i].events & EPOLLOUT;
         if (read_ev || cancel) {
           fd_become_readable(exec_ctx, fd, pollset);
         }
@@ -1041,6 +1073,21 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
       }
     }
   } while (ep_rv == GRPC_EPOLL_MAX_EVENTS);
+
+  GPR_ASSERT(pi != NULL);
+
+  /* Before leaving, release the extra ref we added to the polling island */
+  /* It is important to note that at this point 'pi' may not be the same as
+   * pollset->polling_island. This is because pollset->polling_island pointer
+   * gets updated whenever the underlying polling island is merged with another
+   * island and while we are doing epoll_wait() above, the polling island may
+   * have been merged */
+
+  /* TODO (sreek) - Change the ref count on polling island to gpr_atm so that
+   * we do not have to do this here */
+  gpr_mu_lock(&pi->mu);
+  polling_island_unref_and_unlock(pi, 1);
+
   GPR_TIMER_END("pollset_work_and_unlock", 0);
 }
 

From e682e46a9e451a94cfcb1cf9c927185abd81fceb Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Wed, 8 Jun 2016 15:40:21 -0700
Subject: [PATCH 046/280] Add TODOs

---
 src/core/lib/iomgr/ev_epoll_linux.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 3a3c136a5aa..2e871a4f1ba 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -83,6 +83,7 @@ struct grpc_fd {
      this indicates that the 'fd' on this structure is no longer valid */
   bool orphaned;
 
+  /* TODO: sreek - Move this a lockfree implementation */
   grpc_closure *read_closure;
   grpc_closure *write_closure;
 
@@ -166,6 +167,9 @@ struct grpc_pollset {
 
   /* The polling island to which this pollset belongs to and the mutex
      protecting the field */
+  /* TODO: sreek: This lock might actually be adding more overhead to the
+     critical path (i.e pollset_work() function). Consider removing this lock
+     and just using the overall pollset lock */
   gpr_mu pi_mu;
   struct polling_island *polling_island;
 };

From 3dbf4d61b26e2364a974e47f16f3a655d3eda908 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Wed, 8 Jun 2016 16:26:45 -0700
Subject: [PATCH 047/280] More TODOs

---
 src/core/lib/iomgr/ev_epoll_linux.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 2e871a4f1ba..046ec5e7407 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -83,7 +83,7 @@ struct grpc_fd {
      this indicates that the 'fd' on this structure is no longer valid */
   bool orphaned;
 
-  /* TODO: sreek - Move this a lockfree implementation */
+  /* TODO: sreek - Move this to a lockfree implementation */
   grpc_closure *read_closure;
   grpc_closure *write_closure;
 
@@ -124,6 +124,8 @@ static void fd_global_shutdown(void);
 /*******************************************************************************
  * Polling-island Declarations
  */
+/* TODO: sree: Consider making ref_cnt and merged_to to gpr_atm - This would
+ * significantly reduce the number of mutex acquisition calls. */
 typedef struct polling_island {
   gpr_mu mu;
   int ref_cnt;
@@ -177,6 +179,12 @@ struct grpc_pollset {
 /*******************************************************************************
  * Pollset-set Declarations
  */
+/* TODO: sreek - Change the pollset_set implementation such that a pollset_set
+ * directly points to a polling_island (and adding an fd/pollset/pollset_set to
+ * the current pollset_set would result in polling island merges. This would
+ * remove the need to maintain fd_count here. This will also significantly
+ * simplify the grpc_fd structure since we would no longer need to explicitly
+ * maintain the orphaned state */
 struct grpc_pollset_set {
   gpr_mu mu;
 

From 8e4926c0eeb0df9e5c8029136e39f6c8700f0814 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Wed, 8 Jun 2016 20:33:19 -0700
Subject: [PATCH 048/280] pollset_kick optimization (do not kick any other
 thread if the current thread can be kicked)

---
 src/core/lib/iomgr/ev_epoll_linux.c | 153 ++++++++++++++++------------
 1 file changed, 87 insertions(+), 66 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 046ec5e7407..d45f87c2f8e 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -844,6 +844,8 @@ static void fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
 /*******************************************************************************
  * Pollset Definitions
  */
+GPR_TLS_DECL(g_current_thread_pollset);
+GPR_TLS_DECL(g_current_thread_worker);
 
 static void sig_handler(int sig_num) {
 #ifdef GRPC_EPOLL_DEBUG
@@ -859,11 +861,15 @@ static void poller_kick_init() {
 /* Global state management */
 static void pollset_global_init(void) {
   grpc_wakeup_fd_init(&grpc_global_wakeup_fd);
+  gpr_tls_init(&g_current_thread_pollset);
+  gpr_tls_init(&g_current_thread_worker);
   poller_kick_init();
 }
 
 static void pollset_global_shutdown(void) {
   grpc_wakeup_fd_destroy(&grpc_global_wakeup_fd);
+  gpr_tls_destroy(&g_current_thread_pollset);
+  gpr_tls_destroy(&g_current_thread_worker);
 }
 
 static void pollset_worker_kick(grpc_pollset_worker *worker) {
@@ -915,7 +921,9 @@ static void pollset_kick(grpc_pollset *p,
         GPR_TIMER_BEGIN("pollset_kick.broadcast", 0);
         for (worker = p->root_worker.next; worker != &p->root_worker;
              worker = worker->next) {
-          pollset_worker_kick(worker);
+          if (gpr_tls_get(&g_current_thread_worker) != (intptr_t)worker) {
+            pollset_worker_kick(worker);
+          }
         }
       } else {
         p->kicked_without_pollers = true;
@@ -923,9 +931,18 @@ static void pollset_kick(grpc_pollset *p,
       GPR_TIMER_END("pollset_kick.broadcast", 0);
     } else {
       GPR_TIMER_MARK("kicked_specifically", 0);
-      pollset_worker_kick(worker);
+      if (gpr_tls_get(&g_current_thread_worker) != (intptr_t)worker) {
+        pollset_worker_kick(worker);
+      }
     }
-  } else {
+  } else if (gpr_tls_get(&g_current_thread_pollset) != (intptr_t)p) {
+    /* Since worker == NULL, it means that we can kick "any" worker on this
+       pollset 'p'. If 'p' happens to be the same pollset this thread is
+       currently polling (i.e in pollset_work() function), then there is no need
+       to kick any other worker since the current thread can just absorb the
+       kick. This is the reason why we enter this case only when
+       g_current_thread_pollset is != p */
+
     GPR_TIMER_MARK("kick_anonymous", 0);
     worker = pop_front_worker(p);
     if (worker != NULL) {
@@ -999,6 +1016,69 @@ static void fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
   gpr_mu_unlock(&fd->mu);
 }
 
+/* Release the reference to pollset->polling_island and set it to NULL.
+   pollset->mu must be held */
+static void pollset_release_polling_island_locked(grpc_pollset *pollset) {
+  gpr_mu_lock(&pollset->pi_mu);
+  if (pollset->polling_island) {
+    pollset->polling_island =
+        polling_island_update_and_lock(pollset->polling_island, 1, 0);
+    polling_island_unref_and_unlock(pollset->polling_island, 1);
+    pollset->polling_island = NULL;
+  }
+  gpr_mu_unlock(&pollset->pi_mu);
+}
+
+static void finish_shutdown_locked(grpc_exec_ctx *exec_ctx,
+                                   grpc_pollset *pollset) {
+  /* The pollset cannot have any workers if we are at this stage */
+  GPR_ASSERT(!pollset_has_workers(pollset));
+
+  pollset->finish_shutdown_called = true;
+  pollset_release_polling_island_locked(pollset);
+
+  grpc_exec_ctx_enqueue(exec_ctx, pollset->shutdown_done, true, NULL);
+}
+
+/* pollset->mu lock must be held by the caller before calling this */
+static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                             grpc_closure *closure) {
+  GPR_TIMER_BEGIN("pollset_shutdown", 0);
+  GPR_ASSERT(!pollset->shutting_down);
+  pollset->shutting_down = true;
+  pollset->shutdown_done = closure;
+  pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
+
+  /* If the pollset has any workers, we cannot call finish_shutdown_locked()
+     because it would release the underlying polling island. In such a case, we
+     let the last worker call finish_shutdown_locked() from pollset_work() */
+  if (!pollset_has_workers(pollset)) {
+    GPR_ASSERT(!pollset->finish_shutdown_called);
+    GPR_TIMER_MARK("pollset_shutdown.finish_shutdown_locked", 0);
+    finish_shutdown_locked(exec_ctx, pollset);
+  }
+  GPR_TIMER_END("pollset_shutdown", 0);
+}
+
+/* pollset_shutdown is guaranteed to be called before pollset_destroy. So other
+ * than destroying the mutexes, there is nothing special that needs to be done
+ * here */
+static void pollset_destroy(grpc_pollset *pollset) {
+  GPR_ASSERT(!pollset_has_workers(pollset));
+  gpr_mu_destroy(&pollset->pi_mu);
+  gpr_mu_destroy(&pollset->mu);
+}
+
+static void pollset_reset(grpc_pollset *pollset) {
+  GPR_ASSERT(pollset->shutting_down);
+  GPR_ASSERT(!pollset_has_workers(pollset));
+  pollset->shutting_down = false;
+  pollset->finish_shutdown_called = false;
+  pollset->kicked_without_pollers = false;
+  pollset->shutdown_done = NULL;
+  pollset_release_polling_island_locked(pollset);
+}
+
 #define GRPC_EPOLL_MAX_EVENTS 1000
 static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
                                     grpc_pollset *pollset, int timeout_ms,
@@ -1103,69 +1183,6 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
   GPR_TIMER_END("pollset_work_and_unlock", 0);
 }
 
-/* Release the reference to pollset->polling_island and set it to NULL.
-   pollset->mu must be held */
-static void pollset_release_polling_island_locked(grpc_pollset *pollset) {
-  gpr_mu_lock(&pollset->pi_mu);
-  if (pollset->polling_island) {
-    pollset->polling_island =
-        polling_island_update_and_lock(pollset->polling_island, 1, 0);
-    polling_island_unref_and_unlock(pollset->polling_island, 1);
-    pollset->polling_island = NULL;
-  }
-  gpr_mu_unlock(&pollset->pi_mu);
-}
-
-static void finish_shutdown_locked(grpc_exec_ctx *exec_ctx,
-                                   grpc_pollset *pollset) {
-  /* The pollset cannot have any workers if we are at this stage */
-  GPR_ASSERT(!pollset_has_workers(pollset));
-
-  pollset->finish_shutdown_called = true;
-  pollset_release_polling_island_locked(pollset);
-
-  grpc_exec_ctx_enqueue(exec_ctx, pollset->shutdown_done, true, NULL);
-}
-
-/* pollset->mu lock must be held by the caller before calling this */
-static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                             grpc_closure *closure) {
-  GPR_TIMER_BEGIN("pollset_shutdown", 0);
-  GPR_ASSERT(!pollset->shutting_down);
-  pollset->shutting_down = true;
-  pollset->shutdown_done = closure;
-  pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
-
-  /* If the pollset has any workers, we cannot call finish_shutdown_locked()
-     because it would release the underlying polling island. In such a case, we
-     let the last worker call finish_shutdown_locked() from pollset_work() */
-  if (!pollset_has_workers(pollset)) {
-    GPR_ASSERT(!pollset->finish_shutdown_called);
-    GPR_TIMER_MARK("pollset_shutdown.finish_shutdown_locked", 0);
-    finish_shutdown_locked(exec_ctx, pollset);
-  }
-  GPR_TIMER_END("pollset_shutdown", 0);
-}
-
-/* pollset_shutdown is guaranteed to be called before pollset_destroy. So other
- * than destroying the mutexes, there is nothing special that needs to be done
- * here */
-static void pollset_destroy(grpc_pollset *pollset) {
-  GPR_ASSERT(!pollset_has_workers(pollset));
-  gpr_mu_destroy(&pollset->pi_mu);
-  gpr_mu_destroy(&pollset->mu);
-}
-
-static void pollset_reset(grpc_pollset *pollset) {
-  GPR_ASSERT(pollset->shutting_down);
-  GPR_ASSERT(!pollset_has_workers(pollset));
-  pollset->shutting_down = false;
-  pollset->finish_shutdown_called = false;
-  pollset->kicked_without_pollers = false;
-  pollset->shutdown_done = NULL;
-  pollset_release_polling_island_locked(pollset);
-}
-
 /* pollset->mu lock must be held by the caller before calling this.
    The function pollset_work() may temporarily release the lock (pollset->mu)
    during the course of its execution but it will always re-acquire the lock and
@@ -1184,6 +1201,8 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   worker.pt_id = pthread_self();
 
   *worker_hdl = &worker;
+  gpr_tls_set(&g_current_thread_pollset, (intptr_t)pollset);
+  gpr_tls_set(&g_current_thread_worker, (intptr_t)&worker);
 
   if (pollset->kicked_without_pollers) {
     /* If the pollset was kicked without pollers, pretend that the current
@@ -1226,6 +1245,8 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   }
 
   *worker_hdl = NULL;
+  gpr_tls_set(&g_current_thread_pollset, (intptr_t)0);
+  gpr_tls_set(&g_current_thread_worker, (intptr_t)0);
   GPR_TIMER_END("pollset_work", 0);
 }
 

From 0553a436610201b252cfce0ed5d2cea69da15e85 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Thu, 9 Jun 2016 00:42:41 -0700
Subject: [PATCH 049/280] Fix refcounting bug in polling_island_merge

---
 src/core/lib/iomgr/ev_epoll_linux.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index d45f87c2f8e..66bbae52b28 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -512,7 +512,6 @@ polling_island *polling_island_merge(polling_island *p, polling_island *q) {
   /* Get locks on both the polling islands */
   polling_island_pair_update_and_lock(&p, &q);
 
-  /* TODO: sreek: Think about this scenario some more */
   if (p == q) {
     /* Nothing needs to be done here */
     gpr_mu_unlock(&p->mu);
@@ -525,7 +524,7 @@ polling_island *polling_island_merge(polling_island *p, polling_island *q) {
   }
 
   /* "Merge" p with q i.e move all the fds from p (The one with fewer fds) to q
-      )Note that the refcounts on the fds being moved will not change here. This
+      Note that the refcounts on the fds being moved will not change here. This
       is why the last parameter in the following two functions is 'false') */
   polling_island_add_fds_locked(q, p->fds, p->fd_cnt, false);
   polling_island_remove_all_fds_locked(p, false);
@@ -533,9 +532,11 @@ polling_island *polling_island_merge(polling_island *p, polling_island *q) {
   /* Wakeup all the pollers (if any) on p so that they can pickup this change */
   polling_island_add_wakeup_fd_locked(p, &polling_island_wakeup_fd);
 
-  /* The merged polling island inherits all the ref counts of the island merging
-     with it */
+  /* - The merged polling island (i.e q) inherits all the ref counts of the
+       island merging with it (i.e p)
+     - The island p will lose a ref count */
   q->ref_cnt += p->ref_cnt;
+  p->ref_cnt--;
 
   gpr_mu_unlock(&p->mu);
   gpr_mu_unlock(&q->mu);

From 727440216553c01925c0f5bc88293108bb3f051f Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Thu, 9 Jun 2016 09:42:06 -0700
Subject: [PATCH 050/280] Check epoll is actually available. set
 GPR_LINUX_EPOLL only in GLIBC ver 2.9 and above

---
 include/grpc/impl/codegen/port_platform.h |  2 +-
 src/core/lib/iomgr/ev_epoll_linux.c       | 19 +++++++++++++++++++
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/include/grpc/impl/codegen/port_platform.h b/include/grpc/impl/codegen/port_platform.h
index 7a6ec53fb4c..affef9e66b6 100644
--- a/include/grpc/impl/codegen/port_platform.h
+++ b/include/grpc/impl/codegen/port_platform.h
@@ -189,7 +189,6 @@
 #define GPR_GCC_ATOMIC 1
 #define GPR_GCC_TLS 1
 #define GPR_LINUX 1
-#define GPR_LINUX_EPOLL 1
 #define GPR_LINUX_LOG
 #define GPR_LINUX_MULTIPOLL_WITH_EPOLL 1
 #define GPR_POSIX_WAKEUP_FD 1
@@ -201,6 +200,7 @@
 #ifdef __GLIBC_PREREQ
 #if __GLIBC_PREREQ(2, 9)
 #define GPR_LINUX_EVENTFD 1
+#define GPR_LINUX_EPOLL 1
 #endif
 #if __GLIBC_PREREQ(2, 10)
 #define GPR_LINUX_SOCKETUTILS 1
diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 66bbae52b28..d2d5d2852b9 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -1481,7 +1481,26 @@ static const grpc_event_engine_vtable vtable = {
     .shutdown_engine = shutdown_engine,
 };
 
+/* It is possible that GLIBC has epoll but the underlying kernel doesn't.
+ * Create a dummy epoll_fd to make sure epoll support is available */
+static bool is_epoll_available() {
+  int fd = epoll_create1(EPOLL_CLOEXEC);
+  if (fd < 0) {
+    gpr_log(
+        GPR_ERROR,
+        "epoll_create1 failed with error: %d. Not using epoll polling engine",
+        fd);
+    return false;
+  }
+  close(fd);
+  return true;
+}
+
 const grpc_event_engine_vtable *grpc_init_epoll_linux(void) {
+  if (!is_epoll_available()) {
+    return NULL;
+  }
+
   fd_global_init();
   pollset_global_init();
   polling_island_global_init();

From 74686ce7c4354020b4e48ba067ac7635d0e4edb2 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Thu, 9 Jun 2016 15:33:33 -0700
Subject: [PATCH 051/280] Completed interop spec, as well as code for c++

---
 Makefile                                      |   6 +-
 build.yaml                                    |   2 +-
 doc/interop-test-descriptions.md              | 161 +++++++++++++++---
 src/proto/grpc/testing/messages.proto         |  17 +-
 test/cpp/interop/client.cc                    |  63 +++++--
 test/cpp/interop/interop_client.cc            |  99 ++++++-----
 test/cpp/interop/interop_client.h             |   6 +-
 .../{server_main.cc => interop_server.cc}     |  61 +++++--
 test/cpp/interop/rnd.dat                      | Bin 524288 -> 0 bytes
 test/cpp/interop/server_helper.cc             |   4 +
 test/cpp/interop/server_helper.h              |   1 +
 tools/run_tests/sources_and_headers.json      |   2 +-
 .../interop_server_main.vcxproj               |   2 +-
 .../interop_server_main.vcxproj.filters       |   2 +-
 14 files changed, 325 insertions(+), 101 deletions(-)
 rename test/cpp/interop/{server_main.cc => interop_server.cc} (83%)
 delete mode 100644 test/cpp/interop/rnd.dat

diff --git a/Makefile b/Makefile
index 5a5dd5e242c..7738a8d8ff0 100644
--- a/Makefile
+++ b/Makefile
@@ -4194,7 +4194,7 @@ LIBINTEROP_SERVER_MAIN_SRC = \
     $(GENDIR)/src/proto/grpc/testing/empty.pb.cc $(GENDIR)/src/proto/grpc/testing/empty.grpc.pb.cc \
     $(GENDIR)/src/proto/grpc/testing/messages.pb.cc $(GENDIR)/src/proto/grpc/testing/messages.grpc.pb.cc \
     $(GENDIR)/src/proto/grpc/testing/test.pb.cc $(GENDIR)/src/proto/grpc/testing/test.grpc.pb.cc \
-    test/cpp/interop/server_main.cc \
+    test/cpp/interop/interop_server.cc \
 
 PUBLIC_HEADERS_CXX += \
 
@@ -4240,7 +4240,7 @@ ifneq ($(NO_DEPS),true)
 -include $(LIBINTEROP_SERVER_MAIN_OBJS:.o=.dep)
 endif
 endif
-$(OBJDIR)/$(CONFIG)/test/cpp/interop/server_main.o: $(GENDIR)/src/proto/grpc/testing/empty.pb.cc $(GENDIR)/src/proto/grpc/testing/empty.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/messages.pb.cc $(GENDIR)/src/proto/grpc/testing/messages.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/test.pb.cc $(GENDIR)/src/proto/grpc/testing/test.grpc.pb.cc
+$(OBJDIR)/$(CONFIG)/test/cpp/interop/interop_server.o: $(GENDIR)/src/proto/grpc/testing/empty.pb.cc $(GENDIR)/src/proto/grpc/testing/empty.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/messages.pb.cc $(GENDIR)/src/proto/grpc/testing/messages.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/test.pb.cc $(GENDIR)/src/proto/grpc/testing/test.grpc.pb.cc
 
 
 LIBQPS_SRC = \
@@ -14569,8 +14569,8 @@ test/cpp/end2end/test_service_impl.cc: $(OPENSSL_DEP)
 test/cpp/interop/client.cc: $(OPENSSL_DEP)
 test/cpp/interop/client_helper.cc: $(OPENSSL_DEP)
 test/cpp/interop/interop_client.cc: $(OPENSSL_DEP)
+test/cpp/interop/interop_server.cc: $(OPENSSL_DEP)
 test/cpp/interop/server_helper.cc: $(OPENSSL_DEP)
-test/cpp/interop/server_main.cc: $(OPENSSL_DEP)
 test/cpp/qps/client_async.cc: $(OPENSSL_DEP)
 test/cpp/qps/client_sync.cc: $(OPENSSL_DEP)
 test/cpp/qps/driver.cc: $(OPENSSL_DEP)
diff --git a/build.yaml b/build.yaml
index 302e3f99e04..335e68409f7 100644
--- a/build.yaml
+++ b/build.yaml
@@ -1101,7 +1101,7 @@ libs:
   - src/proto/grpc/testing/empty.proto
   - src/proto/grpc/testing/messages.proto
   - src/proto/grpc/testing/test.proto
-  - test/cpp/interop/server_main.cc
+  - test/cpp/interop/interop_server.cc
   deps:
   - interop_server_helper
   - grpc++_test_util
diff --git a/doc/interop-test-descriptions.md b/doc/interop-test-descriptions.md
index 63b0022c3f6..a023d80c50d 100644
--- a/doc/interop-test-descriptions.md
+++ b/doc/interop-test-descriptions.md
@@ -90,26 +90,84 @@ Client asserts:
 * clients are free to assert that the response payload body contents are zero
   and comparing the entire response message against a golden response
 
+### client_compressed_unary
+
+This test verifies the client can compress unary messages. It sends one
+unary request for a compressable payload type, with and without compression.
+
+Server features:
+* [UnaryCall][]
+* [Compressed Request][]
+
+Procedure:
+ 1. Client calls UnaryCall with:
+
+    ```
+    {
+      expect_compressed_request: true
+      response_type: COMPRESSABLE
+      response_size: 314159
+      payload:{
+        body: 271828 bytes of zeros
+      }
+    }
+    ```
+
+    ```
+    {
+      expect_compressed_request: false
+      response_type: COMPRESSABLE
+      response_size: 314159
+      payload:{
+        body: 271828 bytes of zeros
+      }
+    }
+    ```
+
+    Client asserts:
+    * call was successful
+    * response payload type is COMPRESSABLE
+    * if `request_compressed_response` is false, the response MUST NOT have the
+      compressed message flag set.
+    * if `request_compressed_response` is true, the response MUST have the
+      compressed message flag set.
+    * response payload body is 314159 bytes in size
+    * clients are free to assert that the response payload body contents are
+      zero and comparing the entire response message against a golden response
+
+
 ### server_compressed_unary
 
-This test verifies compressed server-only unary calls succeed in sending
-messages. It sends one unary request for every payload type, with and without
-requesting a compressed response from the server.
+This test verifies the server can compress unary messages. It sends one unary
+request for a COMPRESSABLE payload type, with and without requesting a
+compressed response from the server.
 
-In all scenarios, whether compression was actually performed is determined by
-the compression bit in the response's message flags.
+Whether compression was actually performed is determined by the compression bit
+in the response's message flags.
 
 
 Server features:
 * [UnaryCall][]
 * [Compressable Payload][]
+* [Compressed Response][]
 
 Procedure:
  1. Client calls UnaryCall with:
 
     ```
     {
-      request_compressed_response: bool
+      request_compressed_response: true
+      response_type: COMPRESSABLE
+      response_size: 314159
+      payload:{
+        body: 271828 bytes of zeros
+      }
+    }
+    ```
+
+    ```
+    {
+      request_compressed_response: false
       response_type: COMPRESSABLE
       response_size: 314159
       payload:{
@@ -120,10 +178,10 @@ Procedure:
     Client asserts:
     * call was successful
     * response payload type is COMPRESSABLE
-    * if `request_compressed_response` is false, the response MUST NOT have the
-      compressed message flag set.
-    * if `request_compressed_response` is true, the response MUST have the
+    * when `request_compressed_response` is true, the response MUST have the
       compressed message flag set.
+    * when `request_compressed_response` is false, the response MUST NOT have
+      the compressed message flag set.
     * response payload body is 314159 bytes in size
     * clients are free to assert that the response payload body contents are
       zero and comparing the entire response message against a golden response
@@ -224,11 +282,12 @@ Client asserts:
 
 ### server_compressed_streaming
 
-This test verifies that server-only compressed streaming succeeds.
+This test verifies that the server can compress streaming messages.
 
 Server features:
 * [StreamingOutputCall][]
 * [Compressable Payload][]
+* [Compressed Response][]
 
 
 Procedure:
@@ -262,17 +321,56 @@ Procedure:
 
     Client asserts:
     * call was successful
-    * exactly four responses
+    * exactly two responses
     * response payloads are COMPRESSABLE
-    * if `request_compressed_response` is false, the response's messages MUST
+    * when `request_compressed_response` is false, the response's messages MUST
       NOT have the compressed message flag set.
-    * if `request_compressed_response` is true, the response's messages MUST
+    * when `request_compressed_response` is true, the response's messages MUST
       have the compressed message flag set.
     * response payload bodies are sized (in order): 31415, 58979
     * clients are free to assert that the response payload body contents are
       zero and comparing the entire response messages against golden responses
 
 
+### client_compressed_streaming
+
+This test verifies that the client can compress streaming messages.
+
+Server features:
+* [StreamingInputCall][]
+* [Compressed Request][]
+
+Procedure:
+ 1. Client calls StreamingInputCall
+ 1. Client sends:
+
+    ```
+    {
+      expect_compressed_request: true
+      payload:{
+        body: 27182 bytes of zeros
+      }
+    }
+    ```
+
+ 1. Client then sends:
+
+    ```
+    {
+      expect_compressed_request: false
+      payload:{
+        body: 45904 bytes of zeros
+      }
+    }
+    ```
+
+ 6. Client half-closes
+
+ Client asserts:
+ * call was successful
+ * response aggregated_payload_size is 73086
+
+
 ### ping_pong
 
 This test verifies that full duplex bidi is supported.
@@ -373,7 +471,8 @@ with desired oauth scope.
 
 The test uses `--default_service_account` with GCE service account email and
 `--oauth_scope` with the OAuth scope to use. For testing against
-grpc-test.sandbox.googleapis.com, "https://www.googleapis.com/auth/xapi.zoo" should
+grpc-test.sandbox.googleapis.com, "https://www.googleapis.com/auth/xapi.zoo"
+should
 be passed in as `--oauth_scope`.
 
 Server features:
@@ -400,7 +499,8 @@ Procedure:
 
 Client asserts:
 * call was successful
-* received SimpleResponse.username equals the value of `--default_service_account` flag
+* received SimpleResponse.username equals the value of
+  `--default_service_account` flag
 * received SimpleResponse.oauth_scope is in `--oauth_scope`
 * response payload body is 314159 bytes in size
 * clients are free to assert that the response payload body contents are zero
@@ -444,7 +544,8 @@ Client asserts:
 * call was successful
 * received SimpleResponse.username is not empty and is in the json key file used
 by the auth library. The client can optionally check the username matches the
-email address in the key file or equals the value of `--default_service_account` flag.
+email address in the key file or equals the value of `--default_service_account`
+flag.
 * response payload body is 314159 bytes in size
 * clients are free to assert that the response payload body contents are zero
   and comparing the entire response message against a golden response
@@ -470,8 +571,8 @@ variable GOOGLE_APPLICATION_CREDENTIALS, *OR* if GCE credentials is used to
 fetch the token, `--default_service_account` can be used to pass in GCE service
 account email.
 - uses the flag `--oauth_scope` for the oauth scope.  For testing against
-grpc-test.sandbox.googleapis.com, "https://www.googleapis.com/auth/xapi.zoo" should
-be passed as the `--oauth_scope`.
+grpc-test.sandbox.googleapis.com, "https://www.googleapis.com/auth/xapi.zoo"
+should be passed as the `--oauth_scope`.
 
 Server features:
 * [UnaryCall][]
@@ -481,7 +582,8 @@ Server features:
 
 Procedure:
  1. Client uses the auth library to obtain an authorization token
- 2. Client configures the channel to use AccessTokenCredentials with the access token obtained in step 1
+ 2. Client configures the channel to use AccessTokenCredentials with the access
+    token obtained in step 1
  3. Client calls UnaryCall with the following message
 
     ```
@@ -502,17 +604,17 @@ json key file or GCE default service account email.
 
 Similar to the other auth tests, this test is only for cloud-to-prod path.
 
-This test verifies unary calls succeed in sending messages using a JWT or a service account
-credentials set on the RPC.
+This test verifies unary calls succeed in sending messages using a JWT or a
+service account credentials set on the RPC.
 
 The test
 - uses the flag `--service_account_key_file` with the path to a json key file
 downloaded from https://console.developers.google.com. Alternately, if using a
 usable auth implementation, it may specify the file location in the environment
 variable GOOGLE_APPLICATION_CREDENTIALS
-- optionally uses the flag `--oauth_scope` for the oauth scope if implementator 
+- optionally uses the flag `--oauth_scope` for the oauth scope if implementator
 wishes to use service account credential instead of JWT credential. For testing
-against grpc-test.sandbox.googleapis.com, oauth scope 
+against grpc-test.sandbox.googleapis.com, oauth scope
 "https://www.googleapis.com/auth/xapi.zoo" should be used.
 
 Server features:
@@ -839,6 +941,19 @@ payload body of size `SimpleRequest.response_size` bytes and type as appropriate
 for the `SimpleRequest.response_type`. If the server does not support the
 `response_type`, then it should fail the RPC with `INVALID_ARGUMENT`.
 
+### CompressedResponse
+[CompressedResponse]: #compressedresponse
+
+When the client sets `SimpleRequest.request_compressed_response` to true, the
+response is sent back compressed.
+
+### CompressedRequest
+[CompressedRequest]: #compressedrequest
+
+When the client sets `SimpleRequest.expect_compressed_request ` to true, the
+server expects the client request to be compressed. If it's not, it fails
+the RPC with `INVALID_ARGUMENT`.
+
 ### StreamingInputCall
 [StreamingInputCall]: #streaminginputcall
 
diff --git a/src/proto/grpc/testing/messages.proto b/src/proto/grpc/testing/messages.proto
index e1090156ab4..99b75dea3d5 100644
--- a/src/proto/grpc/testing/messages.proto
+++ b/src/proto/grpc/testing/messages.proto
@@ -38,9 +38,6 @@ package grpc.testing;
 enum PayloadType {
   // Compressable text format.
   COMPRESSABLE = 0;
-
-  // Uncompressable binary format.
-  UNCOMPRESSABLE = 1;
 }
 
 // A block of data, to simply increase gRPC message size.
@@ -82,6 +79,12 @@ message SimpleRequest {
 
   // Whether server should return a given status
   EchoStatus response_status = 7;
+
+  // Whether the server should expect this request to be compressed.
+  bool expect_compressed_request = 8;
+
+  // The type of payload.
+  PayloadType payload_type = 9;
 }
 
 // Unary response, as configured by the request.
@@ -100,6 +103,12 @@ message StreamingInputCallRequest {
   // Optional input payload sent along with the request.
   Payload payload = 1;
 
+  // The type of payload.
+  PayloadType payload_type = 2;
+
+  // Whether the server should expect this request to be compressed.
+  bool expect_compressed_request = 3;
+
   // Not expecting any payload from the response.
 }
 
@@ -135,7 +144,7 @@ message StreamingOutputCallRequest {
   Payload payload = 3;
 
   // Whether to request the server to compress the response.
-  bool request_compressed_response = 6;
+  bool request_compressed_response = 4;
 
   // Whether server should return a given status
   EchoStatus response_status = 7;
diff --git a/test/cpp/interop/client.cc b/test/cpp/interop/client.cc
index 77278249794..c7d081100e2 100644
--- a/test/cpp/interop/client.cc
+++ b/test/cpp/interop/client.cc
@@ -40,7 +40,9 @@
 #include <grpc++/client_context.h>
 #include <grpc/grpc.h>
 #include <grpc/support/log.h>
+#include <grpc/support/useful.h>
 
+#include "src/core/lib/support/string.h"
 #include "test/cpp/interop/client_helper.h"
 #include "test/cpp/interop/interop_client.h"
 #include "test/cpp/util/test_config.h"
@@ -55,10 +57,14 @@ DEFINE_string(test_case, "large_unary",
               "Configure different test cases. Valid options are: "
               "empty_unary : empty (zero bytes) request and response; "
               "large_unary : single request and (large) response; "
-              "large_compressed_unary : single request and compressed (large) "
-              "response; "
+
+              "client_compressed_unary : single compressed request; "
+              "server_compressed_unary : single compressed response; "
+
               "client_streaming : request streaming with single response; "
               "server_streaming : single request with response streaming; "
+              "client_compressed_streaming : compressed request streaming with "
+              "single response; "
               "server_compressed_streaming : single request with compressed "
               "response streaming; "
               "slow_consumer : single request with response; "
@@ -104,14 +110,18 @@ int main(int argc, char** argv) {
     client.DoEmpty();
   } else if (FLAGS_test_case == "large_unary") {
     client.DoLargeUnary();
-  } else if (FLAGS_test_case == "large_compressed_unary") {
-    client.DoLargeCompressedUnary();
+  } else if (FLAGS_test_case == "server_compressed_unary") {
+    client.DoServerCompressedUnary();
+  } else if (FLAGS_test_case == "client_compressed_unary") {
+    client.DoClientCompressedUnary();
   } else if (FLAGS_test_case == "client_streaming") {
     client.DoRequestStreaming();
   } else if (FLAGS_test_case == "server_streaming") {
     client.DoResponseStreaming();
   } else if (FLAGS_test_case == "server_compressed_streaming") {
-    client.DoResponseCompressedStreaming();
+    client.DoServerCompressedStreaming();
+  } else if (FLAGS_test_case == "client_compressed_streaming") {
+    client.DoClientCompressedStreaming();
   } else if (FLAGS_test_case == "slow_consumer") {
     client.DoResponseStreamingWithSlowConsumer();
   } else if (FLAGS_test_case == "half_duplex") {
@@ -144,9 +154,12 @@ int main(int argc, char** argv) {
   } else if (FLAGS_test_case == "all") {
     client.DoEmpty();
     client.DoLargeUnary();
+    client.DoClientCompressedUnary();
+    client.DoServerCompressedUnary();
     client.DoRequestStreaming();
     client.DoResponseStreaming();
-    client.DoResponseCompressedStreaming();
+    client.DoClientCompressedStreaming();
+    client.DoServerCompressedStreaming();
     client.DoHalfDuplex();
     client.DoPingPong();
     client.DoCancelAfterBegin();
@@ -165,14 +178,36 @@ int main(int argc, char** argv) {
     }
     // compute_engine_creds only runs in GCE.
   } else {
-    gpr_log(
-        GPR_ERROR,
-        "Unsupported test case %s. Valid options are all|empty_unary|"
-        "large_unary|large_compressed_unary|client_streaming|server_streaming|"
-        "server_compressed_streaming|half_duplex|ping_pong|cancel_after_begin|"
-        "cancel_after_first_response|timeout_on_sleeping_server|empty_stream|"
-        "compute_engine_creds|jwt_token_creds|oauth2_auth_token|per_rpc_creds",
-        "status_code_and_message|custom_metadata", FLAGS_test_case.c_str());
+    const char* testcases[] =
+    { "all",
+      "cancel_after_begin",
+      "cancel_after_first_response",
+      "client_compressed_streaming",
+      "client_compressed_unary",
+      "client_streaming",
+      "compute_engine_creds",
+      "custom_metadata",
+      "empty_stream",
+      "empty_unary",
+      "half_duplex",
+      "jwt_token_creds",
+      "large_unary",
+      "oauth2_auth_token",
+      "oauth2_auth_token",
+      "per_rpc_creds",
+      "per_rpc_creds",
+      "ping_pong",
+      "server_compressed_streaming",
+      "server_compressed_unary",
+      "server_streaming",
+      "status_code_and_message",
+      "timeout_on_sleeping_server"};
+    char* joined_testcases =
+        gpr_strjoin_sep(testcases, GPR_ARRAY_SIZE(testcases), "\n", NULL);
+
+    gpr_log(GPR_ERROR, "Unsupported test case %s. Valid options are\n%s",
+            FLAGS_test_case.c_str(), joined_testcases);
+    gpr_free(joined_testcases);
     ret = 1;
   }
 
diff --git a/test/cpp/interop/interop_client.cc b/test/cpp/interop/interop_client.cc
index 7705bb15922..e5d37514028 100644
--- a/test/cpp/interop/interop_client.cc
+++ b/test/cpp/interop/interop_client.cc
@@ -73,23 +73,22 @@ void CompressionChecks(const InteropClientContextInspector& inspector,
                        const SimpleResponse* response) {
   const grpc_compression_algorithm received_compression =
       inspector.GetCallCompressionAlgorithm();
-  if (request->request_compressed_response() &&
-      received_compression == GRPC_COMPRESS_NONE) {
-    if (request->request_compressed_response() &&
-        received_compression == GRPC_COMPRESS_NONE) {
+  if (request->request_compressed_response()) {
+    if (received_compression == GRPC_COMPRESS_NONE) {
       // Requested some compression, got NONE. This is an error.
       gpr_log(GPR_ERROR,
               "Failure: Requested compression but got uncompressed response "
               "from server.");
       abort();
     }
-  }
-  if (!request->request_compressed_response()) {
+    if (request->response_type() == PayloadType::COMPRESSABLE) {
+      // requested compression and compressable response => results should
+      // always be compressed.
+      GPR_ASSERT(inspector.GetMessageFlags() & GRPC_WRITE_INTERNAL_COMPRESS);
+    }
+  } else {
+    // Didn't request compression -> make sure the response is uncompressed
     GPR_ASSERT(!(inspector.GetMessageFlags() & GRPC_WRITE_INTERNAL_COMPRESS));
-  } else if (request->response_type() == PayloadType::COMPRESSABLE) {
-    // requested compression and compressable response => results should always
-    // be compressed.
-    GPR_ASSERT(inspector.GetMessageFlags() & GRPC_WRITE_INTERNAL_COMPRESS);
   }
 }
 }  // namespace
@@ -211,17 +210,6 @@ bool InteropClient::PerformLargeUnary(SimpleRequest* request,
       GPR_ASSERT(response->payload().body() ==
                  grpc::string(kLargeResponseSize, '\0'));
       break;
-    case PayloadType::UNCOMPRESSABLE: {
-      // We don't really check anything: We can't assert that the payload is
-      // uncompressed because it's the server's prerogative to decide on that,
-      // and different implementations decide differently (ie, Java always
-      // compresses when requested to do so, whereas C core throws away the
-      // compressed payload if the output is larger than the input).
-      // In addition, we don't compare the actual random bytes received because
-      // asserting that data is sent/received properly isn't the purpose of this
-      // test. Moreover, different implementations are also free to use
-      // different sets of random bytes.
-    } break;
     default:
       GPR_ASSERT(false);
   }
@@ -336,9 +324,39 @@ bool InteropClient::DoLargeUnary() {
   return true;
 }
 
-bool InteropClient::DoLargeCompressedUnary() {
+bool InteropClient::DoClientCompressedUnary() {
+  const bool expect_compression[] = {false, true};
+  const PayloadType payload_types[] = {COMPRESSABLE};
+  for (size_t i = 0; i < GPR_ARRAY_SIZE(payload_types); i++) {
+    for (size_t j = 0; j < GPR_ARRAY_SIZE(expect_compression); j++) {
+      char* log_suffix;
+      gpr_asprintf(&log_suffix, "(compression=%s; payload=%s)",
+                   expect_compression[j] ? "true" : "false",
+                   PayloadType_Name(payload_types[i]).c_str());
+
+      gpr_log(GPR_DEBUG, "Sending compressed unary request %s.", log_suffix);
+      SimpleRequest request;
+      SimpleResponse response;
+      request.set_response_type(payload_types[i]);
+      request.set_expect_compressed_request(expect_compression[j]);
+
+      if (!PerformLargeUnary(&request, &response, CompressionChecks)) {
+        gpr_log(GPR_ERROR, "Compressed unary request failed %s", log_suffix);
+        gpr_free(log_suffix);
+        return false;
+      }
+
+      gpr_log(GPR_DEBUG, "Compressed unary request failed %s", log_suffix);
+      gpr_free(log_suffix);
+    }
+  }
+
+  return true;
+}
+
+bool InteropClient::DoServerCompressedUnary() {
   const bool request_compression[] = {false, true};
-  const PayloadType payload_types[] = {COMPRESSABLE, UNCOMPRESSABLE};
+  const PayloadType payload_types[] = {COMPRESSABLE};
   for (size_t i = 0; i < GPR_ARRAY_SIZE(payload_types); i++) {
     for (size_t j = 0; j < GPR_ARRAY_SIZE(request_compression); j++) {
       char* log_suffix;
@@ -346,7 +364,7 @@ bool InteropClient::DoLargeCompressedUnary() {
                    request_compression[j] ? "true" : "false",
                    PayloadType_Name(payload_types[i]).c_str());
 
-      gpr_log(GPR_DEBUG, "Sending a large compressed unary rpc %s.",
+      gpr_log(GPR_DEBUG, "Sending unary request for compressed response %s.",
               log_suffix);
       SimpleRequest request;
       SimpleResponse response;
@@ -354,12 +372,13 @@ bool InteropClient::DoLargeCompressedUnary() {
       request.set_request_compressed_response(request_compression[j]);
 
       if (!PerformLargeUnary(&request, &response, CompressionChecks)) {
-        gpr_log(GPR_ERROR, "Large compressed unary failed %s", log_suffix);
+        gpr_log(GPR_ERROR, "Request for compressed unary failed %s",
+                log_suffix);
         gpr_free(log_suffix);
         return false;
       }
 
-      gpr_log(GPR_DEBUG, "Large compressed unary done %s.", log_suffix);
+      gpr_log(GPR_DEBUG, "Request for compressed unary failed %s", log_suffix);
       gpr_free(log_suffix);
     }
   }
@@ -447,9 +466,16 @@ bool InteropClient::DoResponseStreaming() {
   return true;
 }
 
-bool InteropClient::DoResponseCompressedStreaming() {
+bool InteropClient::DoClientCompressedStreaming() {
+  // XXX
+  return false;
+}
+
+bool InteropClient::DoServerCompressedStreaming() {
   const bool request_compression[] = {false, true};
-  const PayloadType payload_types[] = {COMPRESSABLE, UNCOMPRESSABLE};
+  const PayloadType payload_types[] = {COMPRESSABLE};
+  const std::vector<int> response_stream_sizes = {31415, 58979};
+
   for (size_t i = 0; i < GPR_ARRAY_SIZE(payload_types); i++) {
     for (size_t j = 0; j < GPR_ARRAY_SIZE(request_compression); j++) {
       ClientContext context;
@@ -466,11 +492,10 @@ bool InteropClient::DoResponseCompressedStreaming() {
       request.set_response_type(payload_types[i]);
       request.set_request_compressed_response(request_compression[j]);
 
-      for (size_t k = 0; k < response_stream_sizes.size() / 2; ++k) {
+      for (size_t k = 0; k < response_stream_sizes.size(); ++k) {
         ResponseParameters* response_parameter =
             request.add_response_parameters();
-        response_parameter->set_size(response_stream_sizes[k] +
-                                     response_stream_sizes[k + 1]);
+        response_parameter->set_size(response_stream_sizes[k]);
       }
       StreamingOutputCallResponse response;
 
@@ -484,11 +509,7 @@ bool InteropClient::DoResponseCompressedStreaming() {
         switch (response.payload().type()) {
           case PayloadType::COMPRESSABLE:
             GPR_ASSERT(response.payload().body() ==
-                       grpc::string(response_stream_sizes[k] +
-                                        response_stream_sizes[k + 1],
-                                    '\0'));
-            break;
-          case PayloadType::UNCOMPRESSABLE:
+                       grpc::string(response_stream_sizes[k], '\0'));
             break;
           default:
             GPR_ASSERT(false);
@@ -516,14 +537,14 @@ bool InteropClient::DoResponseCompressedStreaming() {
       gpr_log(GPR_DEBUG, "Response streaming done %s.", log_suffix);
       gpr_free(log_suffix);
 
-      if (k < response_stream_sizes.size() / 2) {
+      if (k < response_stream_sizes.size()) {
         // stream->Read() failed before reading all the expected messages. This
         // is most likely due to a connection failure.
         gpr_log(GPR_ERROR,
-                "DoResponseCompressedStreaming(): Responses read (k=%d) is "
+                "DoServerCompressedStreaming(): Responses read (k=%d) is "
                 "less than the expected messages (i.e "
                 "response_stream_sizes.size()/2 (%d)). (i=%d, j=%d)",
-                k, response_stream_sizes.size() / 2, i, j);
+                k, response_stream_sizes.size(), i, j);
         return TransientFailureOrAbort();
       }
 
diff --git a/test/cpp/interop/interop_client.h b/test/cpp/interop/interop_client.h
index ae75762bb8f..ea44986fbc4 100644
--- a/test/cpp/interop/interop_client.h
+++ b/test/cpp/interop/interop_client.h
@@ -64,12 +64,14 @@ class InteropClient {
 
   bool DoEmpty();
   bool DoLargeUnary();
-  bool DoLargeCompressedUnary();
+  bool DoServerCompressedUnary();
+  bool DoClientCompressedUnary();
   bool DoPingPong();
   bool DoHalfDuplex();
   bool DoRequestStreaming();
   bool DoResponseStreaming();
-  bool DoResponseCompressedStreaming();
+  bool DoServerCompressedStreaming();
+  bool DoClientCompressedStreaming();
   bool DoResponseStreamingWithSlowConsumer();
   bool DoCancelAfterBegin();
   bool DoCancelAfterFirstResponse();
diff --git a/test/cpp/interop/server_main.cc b/test/cpp/interop/interop_server.cc
similarity index 83%
rename from test/cpp/interop/server_main.cc
rename to test/cpp/interop/interop_server.cc
index bbedda14d25..b328f478fa0 100644
--- a/test/cpp/interop/server_main.cc
+++ b/test/cpp/interop/interop_server.cc
@@ -48,6 +48,7 @@
 #include <grpc/support/log.h>
 #include <grpc/support/useful.h>
 
+#include "src/core/lib/transport/byte_stream.h"
 #include "src/proto/grpc/testing/empty.grpc.pb.h"
 #include "src/proto/grpc/testing/messages.grpc.pb.h"
 #include "src/proto/grpc/testing/test.grpc.pb.h"
@@ -78,7 +79,6 @@ using grpc::testing::TestService;
 using grpc::Status;
 
 static bool got_sigint = false;
-static const char* kRandomFile = "test/cpp/interop/rnd.dat";
 
 const char kEchoInitialMetadataKey[] = "x-grpc-test-echo-initial";
 const char kEchoTrailingBinMetadataKey[] = "x-grpc-test-echo-trailing-bin";
@@ -117,16 +117,8 @@ bool SetPayload(PayloadType response_type, int size, Payload* payload) {
       std::unique_ptr<char[]> body(new char[size]());
       payload->set_body(body.get(), size);
     } break;
-    case PayloadType::UNCOMPRESSABLE: {
-      std::unique_ptr<char[]> body(new char[size]());
-      std::ifstream rnd_file(kRandomFile);
-      GPR_ASSERT(rnd_file.good());
-      rnd_file.read(body.get(), size);
-      GPR_ASSERT(!rnd_file.eof());  // Requested more rnd bytes than available
-      payload->set_body(body.get(), size);
-    } break;
     default:
-      GPR_ASSERT(false);
+      return false;
   }
   return true;
 }
@@ -140,6 +132,41 @@ void SetResponseCompression(ServerContext* context,
   }
 }
 
+template <typename RequestType>
+bool CheckExpectedCompression(const ServerContext& context,
+                              const RequestType& request) {
+  const InteropServerContextInspector inspector(context);
+  const grpc_compression_algorithm received_compression =
+      inspector.GetCallCompressionAlgorithm();
+
+  if (request.expect_compressed_request()) {
+    if (received_compression == GRPC_COMPRESS_NONE) {
+      // Expected some compression, got NONE. This is an error.
+      gpr_log(GPR_ERROR,
+              "Failure: Expected compression but got uncompressed request "
+              "from client.");
+      return false;
+    }
+    if (request.payload_type() == PayloadType::COMPRESSABLE) {
+      if (!(inspector.GetMessageFlags() & GRPC_WRITE_INTERNAL_COMPRESS)) {
+        gpr_log(GPR_ERROR,
+                "Failure: Requested compression in a compressable request, but "
+                "compression bit in message flags not set.");
+        return false;
+      }
+    }
+  } else {
+    // Didn't expect compression -> make sure the request is uncompressed
+    if (inspector.GetMessageFlags() & GRPC_WRITE_INTERNAL_COMPRESS) {
+      gpr_log(GPR_ERROR,
+              "Failure: Didn't requested compression, but compression bit in "
+              "message flags set.");
+      return false;
+    }
+  }
+  return true;
+}
+
 class TestServiceImpl : public TestService::Service {
  public:
   Status EmptyCall(ServerContext* context, const grpc::testing::Empty* request,
@@ -152,10 +179,15 @@ class TestServiceImpl : public TestService::Service {
                    SimpleResponse* response) {
     MaybeEchoMetadata(context);
     SetResponseCompression(context, *request);
+    if (!CheckExpectedCompression(*context, *request)) {
+      return Status(grpc::StatusCode::INVALID_ARGUMENT,
+                    "Compressed request expectation not met.");
+    }
     if (request->response_size() > 0) {
       if (!SetPayload(request->response_type(), request->response_size(),
                       response->mutable_payload())) {
-        return Status(grpc::StatusCode::INTERNAL, "Error creating payload.");
+        return Status(grpc::StatusCode::INVALID_ARGUMENT,
+                      "Error creating payload.");
       }
     }
 
@@ -179,7 +211,8 @@ class TestServiceImpl : public TestService::Service {
       if (!SetPayload(request->response_type(),
                       request->response_parameters(i).size(),
                       response.mutable_payload())) {
-        return Status(grpc::StatusCode::INTERNAL, "Error creating payload.");
+        return Status(grpc::StatusCode::INVALID_ARGUMENT,
+                      "Error creating payload.");
       }
       write_success = writer->Write(response);
     }
@@ -196,6 +229,10 @@ class TestServiceImpl : public TestService::Service {
     StreamingInputCallRequest request;
     int aggregated_payload_size = 0;
     while (reader->Read(&request)) {
+      if (!CheckExpectedCompression(*context, request)) {
+        return Status(grpc::StatusCode::INVALID_ARGUMENT,
+                      "Compressed request expectation not met.");
+      }
       if (request.has_payload()) {
         aggregated_payload_size += request.payload().body().size();
       }
diff --git a/test/cpp/interop/rnd.dat b/test/cpp/interop/rnd.dat
deleted file mode 100644
index 8c7f38f9e0e01b33798cbe743bd5f873b6e0a1af..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

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z<+a0J@kJ!!#}^<reusy5OB%%@Q#wXmX4gNO5`Y5DsT=G4EJ~pba3|6IE4gPW@pNv<
zGLjCxCP)Dp?vW%?F2J{1>e;*M9E|`9UU6VoPXXs~{z^D0{tPe4ykmSHX1dPRk-OpU
zZ6$ZWs+_!!ArGeO`mr+}90g}FYTCjqigknum0%IyRVMu(v4Wh#nzr{-W-E~7pCz+S
hY_RWnvXt!;6BB^L!h&!yDt`#9*7Iy)KL39)t@N~W73lx~

diff --git a/test/cpp/interop/server_helper.cc b/test/cpp/interop/server_helper.cc
index c6d891ad71b..8b0b511bcb8 100644
--- a/test/cpp/interop/server_helper.cc
+++ b/test/cpp/interop/server_helper.cc
@@ -72,6 +72,10 @@ uint32_t InteropServerContextInspector::GetEncodingsAcceptedByClient() const {
   return grpc_call_test_only_get_encodings_accepted_by_peer(context_.call_);
 }
 
+uint32_t InteropServerContextInspector::GetMessageFlags() const {
+  return grpc_call_test_only_get_message_flags(context_.call_);
+}
+
 std::shared_ptr<const AuthContext>
 InteropServerContextInspector::GetAuthContext() const {
   return context_.auth_context();
diff --git a/test/cpp/interop/server_helper.h b/test/cpp/interop/server_helper.h
index 12865e40324..a1da14a4c8d 100644
--- a/test/cpp/interop/server_helper.h
+++ b/test/cpp/interop/server_helper.h
@@ -54,6 +54,7 @@ class InteropServerContextInspector {
   bool IsCancelled() const;
   grpc_compression_algorithm GetCallCompressionAlgorithm() const;
   uint32_t GetEncodingsAcceptedByClient() const;
+  uint32_t GetMessageFlags() const;
 
  private:
   const ::grpc::ServerContext& context_;
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index e23c1cb6002..5aea0af0a2f 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -4519,7 +4519,7 @@
     "language": "c++", 
     "name": "interop_server_main", 
     "src": [
-      "test/cpp/interop/server_main.cc"
+      "test/cpp/interop/interop_server.cc"
     ], 
     "third_party": false, 
     "type": "lib"
diff --git a/vsprojects/vcxproj/interop_server_main/interop_server_main.vcxproj b/vsprojects/vcxproj/interop_server_main/interop_server_main.vcxproj
index 075750afc6d..18971d6a341 100644
--- a/vsprojects/vcxproj/interop_server_main/interop_server_main.vcxproj
+++ b/vsprojects/vcxproj/interop_server_main/interop_server_main.vcxproj
@@ -171,7 +171,7 @@
     </ClCompile>
     <ClInclude Include="$(SolutionDir)\..\src\proto\grpc\testing\test.grpc.pb.h">
     </ClInclude>
-    <ClCompile Include="$(SolutionDir)\..\test\cpp\interop\server_main.cc">
+    <ClCompile Include="$(SolutionDir)\..\test\cpp\interop\interop_server.cc">
     </ClCompile>
   </ItemGroup>
   <ItemGroup>
diff --git a/vsprojects/vcxproj/interop_server_main/interop_server_main.vcxproj.filters b/vsprojects/vcxproj/interop_server_main/interop_server_main.vcxproj.filters
index 51a6b9e73c3..4ee8135c045 100644
--- a/vsprojects/vcxproj/interop_server_main/interop_server_main.vcxproj.filters
+++ b/vsprojects/vcxproj/interop_server_main/interop_server_main.vcxproj.filters
@@ -10,7 +10,7 @@
     <ClCompile Include="$(SolutionDir)\..\src\proto\grpc\testing\test.proto">
       <Filter>src\proto\grpc\testing</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\test\cpp\interop\server_main.cc">
+    <ClCompile Include="$(SolutionDir)\..\test\cpp\interop\interop_server.cc">
       <Filter>test\cpp\interop</Filter>
     </ClCompile>
   </ItemGroup>

From 7b3fa9e54fda047237f47be2c13fc015bb0546a4 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Thu, 9 Jun 2016 16:12:53 -0700
Subject: [PATCH 052/280] Reworded spec.

---
 doc/interop-test-descriptions.md | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/doc/interop-test-descriptions.md b/doc/interop-test-descriptions.md
index a023d80c50d..ebeb62753b4 100644
--- a/doc/interop-test-descriptions.md
+++ b/doc/interop-test-descriptions.md
@@ -92,8 +92,10 @@ Client asserts:
 
 ### client_compressed_unary
 
-This test verifies the client can compress unary messages. It sends one
-unary request for a compressable payload type, with and without compression.
+This test verifies the client can compress unary messages. It sends two
+unary requests with their payloads marked as COMPRESSABLE. One request will be
+sent compressed and its `expect_compressed_request` set to true. Conversely for
+the uncompressed case.
 
 Server features:
 * [UnaryCall][]
@@ -138,9 +140,9 @@ Procedure:
 
 ### server_compressed_unary
 
-This test verifies the server can compress unary messages. It sends one unary
-request for a COMPRESSABLE payload type, with and without requesting a
-compressed response from the server.
+This test verifies the server can compress unary messages. It sends two unary
+requests for a COMPRESSABLE payload type, expecting the server response to be
+compressed or not according to the `request_compressed_response` boolean.
 
 Whether compression was actually performed is determined by the compression bit
 in the response's message flags.

From c7be7c688829281b543428ec22029d4d09bd2a9c Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Thu, 9 Jun 2016 17:08:50 -0700
Subject: [PATCH 053/280] Add an API at the core level to disable signals or
 use a different signal number

---
 include/grpc/grpc_posix.h           |  8 +++++
 src/core/lib/iomgr/ev_epoll_linux.c | 45 ++++++++++++++++++++++-------
 2 files changed, 43 insertions(+), 10 deletions(-)

diff --git a/include/grpc/grpc_posix.h b/include/grpc/grpc_posix.h
index 9742b83374a..5e89ae3b1ee 100644
--- a/include/grpc/grpc_posix.h
+++ b/include/grpc/grpc_posix.h
@@ -63,6 +63,14 @@ GRPCAPI void grpc_server_add_insecure_channel_from_fd(grpc_server *server,
                                                       grpc_completion_queue *cq,
                                                       int fd);
 
+/** GRPC Core POSIX library may internally use signals to optimize some work.
+   The library uses (SIGRTMIN + 2) signal by default. Use this API to instruct
+   the library to use a different signal i.e 'signum' instead.
+   Note:
+   - To prevent GRPC library from using any signals, pass a 'signum' of -1
+   - This API is optional but if called, it MUST be called before grpc_init() */
+GRPCAPI void grpc_use_signal(int signum);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index d2d5d2852b9..7e01ac144f2 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -31,6 +31,7 @@
  *
  */
 
+#include <grpc/grpc_posix.h>
 #include <grpc/support/port_platform.h>
 
 #ifdef GPR_LINUX_EPOLL
@@ -58,9 +59,26 @@
 #include "src/core/lib/profiling/timers.h"
 #include "src/core/lib/support/block_annotate.h"
 
-struct polling_island;
+static int grpc_wakeup_signal = -1;
+static bool is_grpc_wakeup_signal_initialized = false;
+
+/* Implements the function defined in grpc_posix.h. This function might be
+ * called before even calling grpc_init() to set either a different signal to
+ * use. If signum == -1, then the use of signals is disabled */
+void grpc_use_signal(int signum) {
+  grpc_wakeup_signal = signum;
+  is_grpc_wakeup_signal_initialized = true;
 
-static int grpc_poller_kick_signum;
+  if (grpc_wakeup_signal < 0) {
+    gpr_log(GPR_INFO,
+            "Use of signals is disabled. Epoll engine will not be used");
+  } else {
+    gpr_log(GPR_INFO, "epoll engine will be using signal: %d",
+            grpc_wakeup_signal);
+  }
+}
+
+struct polling_island;
 
 /*******************************************************************************
  * Fd Declarations
@@ -854,10 +872,7 @@ static void sig_handler(int sig_num) {
 #endif
 }
 
-static void poller_kick_init() {
-  grpc_poller_kick_signum = SIGRTMIN + 2;
-  signal(grpc_poller_kick_signum, sig_handler);
-}
+static void poller_kick_init() { signal(grpc_wakeup_signal, sig_handler); }
 
 /* Global state management */
 static void pollset_global_init(void) {
@@ -874,7 +889,7 @@ static void pollset_global_shutdown(void) {
 }
 
 static void pollset_worker_kick(grpc_pollset_worker *worker) {
-  pthread_kill(worker->pt_id, grpc_poller_kick_signum);
+  pthread_kill(worker->pt_id, grpc_wakeup_signal);
 }
 
 /* Return 1 if the pollset has active threads in pollset_work (pollset must
@@ -1214,9 +1229,9 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
     pollset->kicked_without_pollers = 0;
   } else if (!pollset->shutting_down) {
     sigemptyset(&new_mask);
-    sigaddset(&new_mask, grpc_poller_kick_signum);
+    sigaddset(&new_mask, grpc_wakeup_signal);
     pthread_sigmask(SIG_BLOCK, &new_mask, &orig_mask);
-    sigdelset(&orig_mask, grpc_poller_kick_signum);
+    sigdelset(&orig_mask, grpc_wakeup_signal);
 
     push_front_worker(pollset, &worker);
 
@@ -1497,19 +1512,29 @@ static bool is_epoll_available() {
 }
 
 const grpc_event_engine_vtable *grpc_init_epoll_linux(void) {
+  /* If use of signals is disabled, we cannot use epoll engine*/
+  if (is_grpc_wakeup_signal_initialized && grpc_wakeup_signal < 0) {
+    return NULL;
+  }
+
   if (!is_epoll_available()) {
     return NULL;
   }
 
+  if (!is_grpc_wakeup_signal_initialized) {
+    grpc_use_signal(SIGRTMIN + 2);
+  }
+
   fd_global_init();
   pollset_global_init();
   polling_island_global_init();
   return &vtable;
 }
 
-#else /* defined(GPR_LINUX_EPOLL) */
+#else  /* defined(GPR_LINUX_EPOLL) */
 /* If GPR_LINUX_EPOLL is not defined, it means epoll is not available. Return
  * NULL */
 const grpc_event_engine_vtable *grpc_init_epoll_linux(void) { return NULL; }
 
+void grpc_use_signal(int signum) {}
 #endif /* !defined(GPR_LINUX_EPOLL) */

From 492fd961824447e7f12974893dd9bbf37291e5cc Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Fri, 10 Jun 2016 09:03:34 -0700
Subject: [PATCH 054/280] generate_projects.sh after adding grpc_use_signal()
 API

---
 BUILD                                              | 2 ++
 Makefile                                           | 1 +
 grpc.def                                           | 1 +
 src/python/grpcio/grpc/_cython/imports.generated.c | 2 ++
 src/python/grpcio/grpc/_cython/imports.generated.h | 3 +++
 src/ruby/ext/grpc/rb_grpc_imports.generated.c      | 2 ++
 src/ruby/ext/grpc/rb_grpc_imports.generated.h      | 3 +++
 7 files changed, 14 insertions(+)

diff --git a/BUILD b/BUILD
index 68b066d5593..43855751cbc 100644
--- a/BUILD
+++ b/BUILD
@@ -556,6 +556,7 @@ cc_library(
     "src/core/lib/iomgr/closure.h",
     "src/core/lib/iomgr/endpoint.h",
     "src/core/lib/iomgr/endpoint_pair.h",
+    "src/core/lib/iomgr/ev_epoll_linux.h",
     "src/core/lib/iomgr/ev_poll_and_epoll_posix.h",
     "src/core/lib/iomgr/ev_poll_posix.h",
     "src/core/lib/iomgr/ev_posix.h",
@@ -693,6 +694,7 @@ cc_library(
     "src/core/lib/iomgr/endpoint.c",
     "src/core/lib/iomgr/endpoint_pair_posix.c",
     "src/core/lib/iomgr/endpoint_pair_windows.c",
+    "src/core/lib/iomgr/ev_epoll_linux.c",
     "src/core/lib/iomgr/ev_poll_and_epoll_posix.c",
     "src/core/lib/iomgr/ev_poll_posix.c",
     "src/core/lib/iomgr/ev_posix.c",
diff --git a/Makefile b/Makefile
index 620299ed15b..4d8b060760a 100644
--- a/Makefile
+++ b/Makefile
@@ -2764,6 +2764,7 @@ LIBGRPC_CRONET_SRC = \
     src/core/lib/iomgr/endpoint.c \
     src/core/lib/iomgr/endpoint_pair_posix.c \
     src/core/lib/iomgr/endpoint_pair_windows.c \
+    src/core/lib/iomgr/ev_epoll_linux.c \
     src/core/lib/iomgr/ev_poll_and_epoll_posix.c \
     src/core/lib/iomgr/ev_poll_posix.c \
     src/core/lib/iomgr/ev_posix.c \
diff --git a/grpc.def b/grpc.def
index 0046028949e..9f70ce61a30 100644
--- a/grpc.def
+++ b/grpc.def
@@ -90,6 +90,7 @@ EXPORTS
     grpc_call_error_to_string
     grpc_insecure_channel_create_from_fd
     grpc_server_add_insecure_channel_from_fd
+    grpc_use_signal
     grpc_auth_property_iterator_next
     grpc_auth_context_property_iterator
     grpc_auth_context_peer_identity
diff --git a/src/python/grpcio/grpc/_cython/imports.generated.c b/src/python/grpcio/grpc/_cython/imports.generated.c
index 5c49f6cf3e9..a025b99047d 100644
--- a/src/python/grpcio/grpc/_cython/imports.generated.c
+++ b/src/python/grpcio/grpc/_cython/imports.generated.c
@@ -128,6 +128,7 @@ grpc_is_binary_header_type grpc_is_binary_header_import;
 grpc_call_error_to_string_type grpc_call_error_to_string_import;
 grpc_insecure_channel_create_from_fd_type grpc_insecure_channel_create_from_fd_import;
 grpc_server_add_insecure_channel_from_fd_type grpc_server_add_insecure_channel_from_fd_import;
+grpc_use_signal_type grpc_use_signal_import;
 grpc_auth_property_iterator_next_type grpc_auth_property_iterator_next_import;
 grpc_auth_context_property_iterator_type grpc_auth_context_property_iterator_import;
 grpc_auth_context_peer_identity_type grpc_auth_context_peer_identity_import;
@@ -401,6 +402,7 @@ void pygrpc_load_imports(HMODULE library) {
   grpc_call_error_to_string_import = (grpc_call_error_to_string_type) GetProcAddress(library, "grpc_call_error_to_string");
   grpc_insecure_channel_create_from_fd_import = (grpc_insecure_channel_create_from_fd_type) GetProcAddress(library, "grpc_insecure_channel_create_from_fd");
   grpc_server_add_insecure_channel_from_fd_import = (grpc_server_add_insecure_channel_from_fd_type) GetProcAddress(library, "grpc_server_add_insecure_channel_from_fd");
+  grpc_use_signal_import = (grpc_use_signal_type) GetProcAddress(library, "grpc_use_signal");
   grpc_auth_property_iterator_next_import = (grpc_auth_property_iterator_next_type) GetProcAddress(library, "grpc_auth_property_iterator_next");
   grpc_auth_context_property_iterator_import = (grpc_auth_context_property_iterator_type) GetProcAddress(library, "grpc_auth_context_property_iterator");
   grpc_auth_context_peer_identity_import = (grpc_auth_context_peer_identity_type) GetProcAddress(library, "grpc_auth_context_peer_identity");
diff --git a/src/python/grpcio/grpc/_cython/imports.generated.h b/src/python/grpcio/grpc/_cython/imports.generated.h
index 16bb5cdfab6..5bdbbce89b5 100644
--- a/src/python/grpcio/grpc/_cython/imports.generated.h
+++ b/src/python/grpcio/grpc/_cython/imports.generated.h
@@ -335,6 +335,9 @@ extern grpc_insecure_channel_create_from_fd_type grpc_insecure_channel_create_fr
 typedef void(*grpc_server_add_insecure_channel_from_fd_type)(grpc_server *server, grpc_completion_queue *cq, int fd);
 extern grpc_server_add_insecure_channel_from_fd_type grpc_server_add_insecure_channel_from_fd_import;
 #define grpc_server_add_insecure_channel_from_fd grpc_server_add_insecure_channel_from_fd_import
+typedef void(*grpc_use_signal_type)(int signum);
+extern grpc_use_signal_type grpc_use_signal_import;
+#define grpc_use_signal grpc_use_signal_import
 typedef const grpc_auth_property *(*grpc_auth_property_iterator_next_type)(grpc_auth_property_iterator *it);
 extern grpc_auth_property_iterator_next_type grpc_auth_property_iterator_next_import;
 #define grpc_auth_property_iterator_next grpc_auth_property_iterator_next_import
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.c b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
index c13d1a00d74..8e24ef38ed5 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.c
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
@@ -128,6 +128,7 @@ grpc_is_binary_header_type grpc_is_binary_header_import;
 grpc_call_error_to_string_type grpc_call_error_to_string_import;
 grpc_insecure_channel_create_from_fd_type grpc_insecure_channel_create_from_fd_import;
 grpc_server_add_insecure_channel_from_fd_type grpc_server_add_insecure_channel_from_fd_import;
+grpc_use_signal_type grpc_use_signal_import;
 grpc_auth_property_iterator_next_type grpc_auth_property_iterator_next_import;
 grpc_auth_context_property_iterator_type grpc_auth_context_property_iterator_import;
 grpc_auth_context_peer_identity_type grpc_auth_context_peer_identity_import;
@@ -397,6 +398,7 @@ void grpc_rb_load_imports(HMODULE library) {
   grpc_call_error_to_string_import = (grpc_call_error_to_string_type) GetProcAddress(library, "grpc_call_error_to_string");
   grpc_insecure_channel_create_from_fd_import = (grpc_insecure_channel_create_from_fd_type) GetProcAddress(library, "grpc_insecure_channel_create_from_fd");
   grpc_server_add_insecure_channel_from_fd_import = (grpc_server_add_insecure_channel_from_fd_type) GetProcAddress(library, "grpc_server_add_insecure_channel_from_fd");
+  grpc_use_signal_import = (grpc_use_signal_type) GetProcAddress(library, "grpc_use_signal");
   grpc_auth_property_iterator_next_import = (grpc_auth_property_iterator_next_type) GetProcAddress(library, "grpc_auth_property_iterator_next");
   grpc_auth_context_property_iterator_import = (grpc_auth_context_property_iterator_type) GetProcAddress(library, "grpc_auth_context_property_iterator");
   grpc_auth_context_peer_identity_import = (grpc_auth_context_peer_identity_type) GetProcAddress(library, "grpc_auth_context_peer_identity");
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.h b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
index 9c86a3690c5..d6e2a367999 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.h
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
@@ -335,6 +335,9 @@ extern grpc_insecure_channel_create_from_fd_type grpc_insecure_channel_create_fr
 typedef void(*grpc_server_add_insecure_channel_from_fd_type)(grpc_server *server, grpc_completion_queue *cq, int fd);
 extern grpc_server_add_insecure_channel_from_fd_type grpc_server_add_insecure_channel_from_fd_import;
 #define grpc_server_add_insecure_channel_from_fd grpc_server_add_insecure_channel_from_fd_import
+typedef void(*grpc_use_signal_type)(int signum);
+extern grpc_use_signal_type grpc_use_signal_import;
+#define grpc_use_signal grpc_use_signal_import
 typedef const grpc_auth_property *(*grpc_auth_property_iterator_next_type)(grpc_auth_property_iterator *it);
 extern grpc_auth_property_iterator_next_type grpc_auth_property_iterator_next_import;
 #define grpc_auth_property_iterator_next grpc_auth_property_iterator_next_import

From dd8d84ebb576630f7114b97a6677c1983687cfb4 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Fri, 10 Jun 2016 19:10:42 -0700
Subject: [PATCH 055/280] spec comments addressed

---
 doc/interop-test-descriptions.md      | 212 ++++++++++++--------------
 src/proto/grpc/testing/messages.proto |  20 +--
 2 files changed, 106 insertions(+), 126 deletions(-)

diff --git a/doc/interop-test-descriptions.md b/doc/interop-test-descriptions.md
index ebeb62753b4..3dd7807dec0 100644
--- a/doc/interop-test-descriptions.md
+++ b/doc/interop-test-descriptions.md
@@ -68,14 +68,12 @@ control (even if compression is enabled on the channel).
 
 Server features:
 * [UnaryCall][]
-* [Compressable Payload][]
 
 Procedure:
  1. Client calls UnaryCall with:
 
     ```
     {
-      response_type: COMPRESSABLE
       response_size: 314159
       payload:{
         body: 271828 bytes of zeros
@@ -85,29 +83,39 @@ Procedure:
 
 Client asserts:
 * call was successful
-* response payload type is COMPRESSABLE
 * response payload body is 314159 bytes in size
 * clients are free to assert that the response payload body contents are zero
   and comparing the entire response message against a golden response
 
 ### client_compressed_unary
 
-This test verifies the client can compress unary messages. It sends two
-unary requests with their payloads marked as COMPRESSABLE. One request will be
-sent compressed and its `expect_compressed_request` set to true. Conversely for
-the uncompressed case.
+This test verifies the client can compress unary messages. It sends an initial
+inconsistent request to verify whether the server supports the
+[CompressedRequest][] feature. If it does, it should catch the inconsistency and
+fail the call with an `INVALID_ARGUMENT` status. If the feature is supported, it
+proceeds with two unary calls, for compressed and uncompressed payloads.
 
 Server features:
 * [UnaryCall][]
-* [Compressed Request][]
+* [CompressedRequest][]
 
 Procedure:
- 1. Client calls UnaryCall with:
+ 1. Client calls UnaryCall with the feature probe, an **uncompressed** message:
+    ```
+    {
+      expect_compressed: false
+      response_size: 314159
+      payload:{
+        body: 271828 bytes of zeros
+      }
+    }
+    ```
+
+ 1. Client calls UnaryCall with the *compressed* message:
 
     ```
     {
-      expect_compressed_request: true
-      response_type: COMPRESSABLE
+      expect_compressed: true
       response_size: 314159
       payload:{
         body: 271828 bytes of zeros
@@ -115,10 +123,11 @@ Procedure:
     }
     ```
 
+ 1. Client calls UnaryCall with the *uncompressed* message:
+
     ```
     {
-      expect_compressed_request: false
-      response_type: COMPRESSABLE
+      expect_compressed: false
       response_size: 314159
       payload:{
         body: 271828 bytes of zeros
@@ -127,22 +136,18 @@ Procedure:
     ```
 
     Client asserts:
-    * call was successful
-    * response payload type is COMPRESSABLE
-    * if `request_compressed_response` is false, the response MUST NOT have the
-      compressed message flag set.
-    * if `request_compressed_response` is true, the response MUST have the
-      compressed message flag set.
-    * response payload body is 314159 bytes in size
-    * clients are free to assert that the response payload body contents are
-      zero and comparing the entire response message against a golden response
+    * First call was unsuccessful with `INVALID_ARGUMENT` status. Subsequent
+      calls were successful.
+    * Response payload body is 314159 bytes in size.
+    * Clients are free to assert that the response payload body contents are
+      zero and comparing the entire response message against a golden response.
 
 
 ### server_compressed_unary
 
 This test verifies the server can compress unary messages. It sends two unary
-requests for a COMPRESSABLE payload type, expecting the server response to be
-compressed or not according to the `request_compressed_response` boolean.
+requests, expecting the server response to be
+compressed or not according to the `response_compressed` boolean.
 
 Whether compression was actually performed is determined by the compression bit
 in the response's message flags.
@@ -150,16 +155,14 @@ in the response's message flags.
 
 Server features:
 * [UnaryCall][]
-* [Compressable Payload][]
-* [Compressed Response][]
+* [CompressedResponse][]
 
 Procedure:
  1. Client calls UnaryCall with:
 
     ```
     {
-      request_compressed_response: true
-      response_type: COMPRESSABLE
+      response_compressed: true
       response_size: 314159
       payload:{
         body: 271828 bytes of zeros
@@ -169,8 +172,7 @@ Procedure:
 
     ```
     {
-      request_compressed_response: false
-      response_type: COMPRESSABLE
+      response_compressed: false
       response_size: 314159
       payload:{
         body: 271828 bytes of zeros
@@ -179,10 +181,9 @@ Procedure:
     ```
     Client asserts:
     * call was successful
-    * response payload type is COMPRESSABLE
-    * when `request_compressed_response` is true, the response MUST have the
+    * when `response_compressed` is true, the response MUST have the
       compressed message flag set.
-    * when `request_compressed_response` is false, the response MUST NOT have
+    * when `response_compressed` is false, the response MUST NOT have
       the compressed message flag set.
     * response payload body is 314159 bytes in size
     * clients are free to assert that the response payload body contents are
@@ -195,7 +196,6 @@ This test verifies that client-only streaming succeeds.
 
 Server features:
 * [StreamingInputCall][]
-* [Compressable Payload][]
 
 Procedure:
  1. Client calls StreamingInputCall
@@ -245,20 +245,70 @@ Client asserts:
 * call was successful
 * response aggregated_payload_size is 74922
 
+
+### client_compressed_streaming
+
+This test verifies the client can compress streaming messages. It sends an
+initial inconsistent streaming call comprised of a single message to verify if
+the server implements the [CompressedRequest][] feature. If it does, the client
+will then send another streaming call, comprised of two messages: the first one
+compressed with `expect_compressed` true; the second one uncompressed with
+`expected_compressed` false.
+
+Procedure:
+ 1. Client calls StreamingInputCall
+ 1. Client sends the following feature-probing *uncompressed* message
+
+    ```
+    {
+      expect_compressed: true
+      payload:{
+        body: 27182 bytes of zeros
+      }
+    }
+    ```
+    If the call fails with `INVALID_ARGUMENT`, the test fails. Otherwise, we
+    continue.
+
+ 1. Client then sends the *compressed* message
+
+    ```
+    {
+      expect_compressed: true
+      payload:{
+        body: 27182 bytes of zeros
+      }
+    }
+    ```
+ 1. And finally, the *uncompressed* message:
+    ```
+    {
+      expect_compressed: false
+      payload:{
+        body: 45904 bytes of zeros
+      }
+    }
+    ```
+ 1. Client half-closes
+
+ Client asserts:
+ * First call was unsuccessful with `INVALID_ARGUMENT` status. Subsequent
+   calls were successful.
+ * Response aggregated_payload_size is 73086.
+
+
 ### server_streaming
 
 This test verifies that server-only streaming succeeds.
 
 Server features:
 * [StreamingOutputCall][]
-* [Compressable Payload][]
 
 Procedure:
  1. Client calls StreamingOutputCall with:
 
     ```
     {
-      response_type:COMPRESSABLE
       response_parameters:{
         size: 31415
       }
@@ -277,7 +327,6 @@ Procedure:
 Client asserts:
 * call was successful
 * exactly four responses
-* response payloads are COMPRESSABLE
 * response payload bodies are sized (in order): 31415, 9, 2653, 58979
 * clients are free to assert that the response payload body contents are zero
   and comparing the entire response messages against golden responses
@@ -288,8 +337,7 @@ This test verifies that the server can compress streaming messages.
 
 Server features:
 * [StreamingOutputCall][]
-* [Compressable Payload][]
-* [Compressed Response][]
+* [CompressedResponse][]
 
 
 Procedure:
@@ -297,8 +345,7 @@ Procedure:
 
     ```
     {
-      request_compressed_response: true
-      response_type:COMPRESSABLE
+      response_compressed: true
       response_parameters:{
         size: 31415
       }
@@ -310,8 +357,7 @@ Procedure:
 
     ```
     {
-      request_compressed_response: false
-      response_type:COMPRESSABLE
+      response_compressed: false
       response_parameters:{
         size: 31415
       }
@@ -324,69 +370,27 @@ Procedure:
     Client asserts:
     * call was successful
     * exactly two responses
-    * response payloads are COMPRESSABLE
-    * when `request_compressed_response` is false, the response's messages MUST
+    * when `response_compressed` is false, the response's messages MUST
       NOT have the compressed message flag set.
-    * when `request_compressed_response` is true, the response's messages MUST
+    * when `response_compressed` is true, the response's messages MUST
       have the compressed message flag set.
     * response payload bodies are sized (in order): 31415, 58979
     * clients are free to assert that the response payload body contents are
       zero and comparing the entire response messages against golden responses
 
 
-### client_compressed_streaming
-
-This test verifies that the client can compress streaming messages.
-
-Server features:
-* [StreamingInputCall][]
-* [Compressed Request][]
-
-Procedure:
- 1. Client calls StreamingInputCall
- 1. Client sends:
-
-    ```
-    {
-      expect_compressed_request: true
-      payload:{
-        body: 27182 bytes of zeros
-      }
-    }
-    ```
-
- 1. Client then sends:
-
-    ```
-    {
-      expect_compressed_request: false
-      payload:{
-        body: 45904 bytes of zeros
-      }
-    }
-    ```
-
- 6. Client half-closes
-
- Client asserts:
- * call was successful
- * response aggregated_payload_size is 73086
-
-
 ### ping_pong
 
 This test verifies that full duplex bidi is supported.
 
 Server features:
 * [FullDuplexCall][]
-* [Compressable Payload][]
 
 Procedure:
  1. Client calls FullDuplexCall with:
 
     ```
     {
-      response_type: COMPRESSABLE
       response_parameters:{
         size: 31415
       }
@@ -400,7 +404,6 @@ Procedure:
 
     ```
     {
-      response_type: COMPRESSABLE
       response_parameters:{
         size: 9
       }
@@ -414,7 +417,6 @@ Procedure:
 
     ```
     {
-      response_type: COMPRESSABLE
       response_parameters:{
         size: 2653
       }
@@ -428,7 +430,6 @@ Procedure:
 
     ```
     {
-      response_type: COMPRESSABLE
       response_parameters:{
         size: 58979
       }
@@ -443,7 +444,6 @@ Procedure:
 Client asserts:
 * call was successful
 * exactly four responses
-* response payloads are COMPRESSABLE
 * response payload bodies are sized (in order): 31415, 9, 2653, 58979
 * clients are free to assert that the response payload body contents are zero
   and comparing the entire response messages against golden responses
@@ -479,7 +479,6 @@ be passed in as `--oauth_scope`.
 
 Server features:
 * [UnaryCall][]
-* [Compressable Payload][]
 * [Echo Authenticated Username][]
 * [Echo OAuth Scope][]
 
@@ -489,7 +488,6 @@ Procedure:
 
     ```
     {
-      response_type: COMPRESSABLE
       response_size: 314159
       payload:{
         body: 271828 bytes of zeros
@@ -523,7 +521,6 @@ variable GOOGLE_APPLICATION_CREDENTIALS.
 
 Server features:
 * [UnaryCall][]
-* [Compressable Payload][]
 * [Echo Authenticated Username][]
 * [Echo OAuth Scope][]
 
@@ -533,7 +530,6 @@ Procedure:
 
     ```
     {
-      response_type: COMPRESSABLE
       response_size: 314159
       payload:{
         body: 271828 bytes of zeros
@@ -578,7 +574,6 @@ should be passed as the `--oauth_scope`.
 
 Server features:
 * [UnaryCall][]
-* [Compressable Payload][]
 * [Echo Authenticated Username][]
 * [Echo OAuth Scope][]
 
@@ -621,7 +616,6 @@ against grpc-test.sandbox.googleapis.com, oauth scope
 
 Server features:
 * [UnaryCall][]
-* [Compressable Payload][]
 * [Echo Authenticated Username][]
 * [Echo OAuth Scope][]
 
@@ -652,7 +646,6 @@ by the server.
 Server features:
 * [UnaryCall][]
 * [FullDuplexCall][]
-* [Compressable Payload][]
 * [Echo Metadata][]
 
 Procedure:
@@ -667,7 +660,6 @@ Procedure:
 
     ```
     {
-      response_type: COMPRESSABLE
       response_size: 314159
       payload:{
         body: 271828 bytes of zeros
@@ -686,7 +678,6 @@ Procedure:
 
     ```
     {
-      response_type: COMPRESSABLE
       response_size: 314159
       payload:{
         body: 271828 bytes of zeros
@@ -792,14 +783,12 @@ from the server.
 
 Server features:
 * [FullDuplexCall][]
-* [Compressable Payload][]
 
 Procedure:
  1. Client starts FullDuplexCall with
 
     ```
     {
-      response_type: COMPRESSABLE
       response_parameters:{
         size: 31415
       }
@@ -946,15 +935,17 @@ for the `SimpleRequest.response_type`. If the server does not support the
 ### CompressedResponse
 [CompressedResponse]: #compressedresponse
 
-When the client sets `SimpleRequest.request_compressed_response` to true, the
-response is sent back compressed.
+When the client sets `response_compressed` to true, the server's response is
+sent back compressed. Note that `response_compressed` is present on both
+`SimpleRequest` (unary) and `StreamingOutputCallRequest` (streaming).
 
 ### CompressedRequest
 [CompressedRequest]: #compressedrequest
 
-When the client sets `SimpleRequest.expect_compressed_request ` to true, the
-server expects the client request to be compressed. If it's not, it fails
-the RPC with `INVALID_ARGUMENT`.
+When the client sets `expect_compressed` to true, the server expects the client
+request to be compressed. If it's not, it fails the RPC with `INVALID_ARGUMENT`.
+Note that `response_compressed` is present on both `SimpleRequest` (unary) and
+`StreamingOutputCallRequest` (streaming).
 
 ### StreamingInputCall
 [StreamingInputCall]: #streaminginputcall
@@ -982,13 +973,6 @@ payload body of size ResponseParameters.size bytes, as specified by its
 respective ResponseParameters. After receiving half close and sending all
 responses, it closes with OK.
 
-### Compressable Payload
-[Compressable Payload]: #compressable-payload
-
-When the client requests COMPRESSABLE payload, the response includes a payload
-of the size requested containing all zeros and the payload type is
-COMPRESSABLE.
-
 ### Echo Status
 [Echo Status]: #echo-status
 When the client sends a response_status in the request payload, the server closes
diff --git a/src/proto/grpc/testing/messages.proto b/src/proto/grpc/testing/messages.proto
index 99b75dea3d5..782fd40989d 100644
--- a/src/proto/grpc/testing/messages.proto
+++ b/src/proto/grpc/testing/messages.proto
@@ -34,6 +34,7 @@ syntax = "proto3";
 
 package grpc.testing;
 
+// DEPRECATED, don't use. To be removed shortly.
 // The type of payload that should be returned.
 enum PayloadType {
   // Compressable text format.
@@ -42,6 +43,7 @@ enum PayloadType {
 
 // A block of data, to simply increase gRPC message size.
 message Payload {
+  // DEPRECATED, don't use. To be removed shortly.
   // The type of data in body.
   PayloadType type = 1;
   // Primary contents of payload.
@@ -57,12 +59,12 @@ message EchoStatus {
 
 // Unary request.
 message SimpleRequest {
+  // DEPRECATED, don't use. To be removed shortly.
   // Desired payload type in the response from the server.
   // If response_type is RANDOM, server randomly chooses one from other formats.
   PayloadType response_type = 1;
 
   // Desired payload size in the response from the server.
-  // If response_type is COMPRESSABLE, this denotes the size before compression.
   int32 response_size = 2;
 
   // Optional input payload sent along with the request.
@@ -75,16 +77,13 @@ message SimpleRequest {
   bool fill_oauth_scope = 5;
 
   // Whether to request the server to compress the response.
-  bool request_compressed_response = 6;
+  bool response_compressed = 6;
 
   // Whether server should return a given status
   EchoStatus response_status = 7;
 
   // Whether the server should expect this request to be compressed.
-  bool expect_compressed_request = 8;
-
-  // The type of payload.
-  PayloadType payload_type = 9;
+  bool expect_compressed = 8;
 }
 
 // Unary response, as configured by the request.
@@ -103,11 +102,8 @@ message StreamingInputCallRequest {
   // Optional input payload sent along with the request.
   Payload payload = 1;
 
-  // The type of payload.
-  PayloadType payload_type = 2;
-
   // Whether the server should expect this request to be compressed.
-  bool expect_compressed_request = 3;
+  bool expect_compressed = 2;
 
   // Not expecting any payload from the response.
 }
@@ -121,7 +117,6 @@ message StreamingInputCallResponse {
 // Configuration for a particular response.
 message ResponseParameters {
   // Desired payload sizes in responses from the server.
-  // If response_type is COMPRESSABLE, this denotes the size before compression.
   int32 size = 1;
 
   // Desired interval between consecutive responses in the response stream in
@@ -131,6 +126,7 @@ message ResponseParameters {
 
 // Server-streaming request.
 message StreamingOutputCallRequest {
+  // DEPRECATED, don't use. To be removed shortly.
   // Desired payload type in the response from the server.
   // If response_type is RANDOM, the payload from each response in the stream
   // might be of different types. This is to simulate a mixed type of payload
@@ -144,7 +140,7 @@ message StreamingOutputCallRequest {
   Payload payload = 3;
 
   // Whether to request the server to compress the response.
-  bool request_compressed_response = 4;
+  bool response_compressed = 6;
 
   // Whether server should return a given status
   EchoStatus response_status = 7;

From eb16b3dc3cd579931d730ba3fef1f7008f649003 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Fri, 10 Jun 2016 23:06:25 -0700
Subject: [PATCH 056/280] Fix ref counting bug

---
 src/core/lib/iomgr/ev_epoll_linux.c | 20 ++------------------
 1 file changed, 2 insertions(+), 18 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 7e01ac144f2..617afad1975 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -1127,20 +1127,7 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
   /* Update the pollset->polling_island */
   pollset->polling_island = pi;
 
-#ifdef GRPC_EPOLL_DEBUG
-  if (pollset->polling_island->fd_cnt == 0) {
-    gpr_log(GPR_DEBUG, "pollset_work_and_unlock: epoll_fd: %d, No other fds",
-            epoll_fd);
-  }
-  for (size_t i = 0; i < pollset->polling_island->fd_cnt; i++) {
-    gpr_log(GPR_DEBUG,
-            "pollset_work_and_unlock: epoll_fd: %d, fd_count: %d, fd[%d]: %d",
-            epoll_fd, pollset->polling_island->fd_cnt, i,
-            pollset->polling_island->fds[i]->fd);
-  }
-#endif
-  gpr_mu_unlock(&pollset->polling_island->mu);
-
+  polling_island_unref_and_unlock(pollset->polling_island, 0); /* Keep the ref*/
   gpr_mu_unlock(&pollset->pi_mu);
   gpr_mu_unlock(&pollset->mu);
 
@@ -1190,10 +1177,7 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
    * gets updated whenever the underlying polling island is merged with another
    * island and while we are doing epoll_wait() above, the polling island may
    * have been merged */
-
-  /* TODO (sreek) - Change the ref count on polling island to gpr_atm so that
-   * we do not have to do this here */
-  gpr_mu_lock(&pi->mu);
+  polling_island_update_and_lock(pi, 1, 0); /* No new ref added */
   polling_island_unref_and_unlock(pi, 1);
 
   GPR_TIMER_END("pollset_work_and_unlock", 0);

From 58e589644403b10afb31ffd45befabe13b652db8 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Mon, 13 Jun 2016 00:52:56 -0700
Subject: [PATCH 057/280] Fix bad merge

---
 src/core/lib/iomgr/ev_epoll_linux.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 617afad1975..a8a874cd4b0 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -550,14 +550,14 @@ polling_island *polling_island_merge(polling_island *p, polling_island *q) {
   /* Wakeup all the pollers (if any) on p so that they can pickup this change */
   polling_island_add_wakeup_fd_locked(p, &polling_island_wakeup_fd);
 
+  p->merged_to = q;
+
   /* - The merged polling island (i.e q) inherits all the ref counts of the
        island merging with it (i.e p)
      - The island p will lose a ref count */
   q->ref_cnt += p->ref_cnt;
-  p->ref_cnt--;
-
-  gpr_mu_unlock(&p->mu);
-  gpr_mu_unlock(&q->mu);
+  polling_island_unref_and_unlock(p, 1); /* Decrement refcount */
+  polling_island_unref_and_unlock(q, 0); /* Just Unlock. Don't decrement ref */
 
   return q;
 }
@@ -1110,7 +1110,7 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
      Acquire the following locks:
      - pollset->mu (which we already have)
      - pollset->pi_mu
-     - pollset->polling_island->mu */
+     - pollset->polling_island->mu (call polling_island_update_and_lock())*/
   gpr_mu_lock(&pollset->pi_mu);
 
   pi = pollset->polling_island;
@@ -1144,8 +1144,7 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
       }
     }
 
-    int i;
-    for (i = 0; i < ep_rv; ++i) {
+    for (int i = 0; i < ep_rv; ++i) {
       void *data_ptr = ep_ev[i].data.ptr;
       if (data_ptr == &grpc_global_wakeup_fd) {
         grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
@@ -1177,7 +1176,7 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
    * gets updated whenever the underlying polling island is merged with another
    * island and while we are doing epoll_wait() above, the polling island may
    * have been merged */
-  polling_island_update_and_lock(pi, 1, 0); /* No new ref added */
+  pi = polling_island_update_and_lock(pi, 1, 0); /* No new ref added */
   polling_island_unref_and_unlock(pi, 1);
 
   GPR_TIMER_END("pollset_work_and_unlock", 0);

From ddc3ebb6ea694b252c27e149507bec4df427a592 Mon Sep 17 00:00:00 2001
From: yang-g <yangg@google.com>
Date: Mon, 13 Jun 2016 10:40:32 -0700
Subject: [PATCH 058/280] add missing language tag

---
 build.yaml                               | 11 +++++-----
 tools/run_tests/sources_and_headers.json | 26 ++++++++++++------------
 2 files changed, 19 insertions(+), 18 deletions(-)

diff --git a/build.yaml b/build.yaml
index a94fb052a5d..8589ba28f8e 100644
--- a/build.yaml
+++ b/build.yaml
@@ -143,11 +143,6 @@ filegroups:
   - include/grpc/impl/codegen/sync_posix.h
   - include/grpc/impl/codegen/sync_windows.h
   - include/grpc/impl/codegen/time.h
-- name: grpc++_codegen_base_src
-  src:
-  - src/cpp/codegen/codegen_init.cc
-  uses:
-  - grpc++_codegen_base
 - name: grpc_base
   public_headers:
   - include/grpc/byte_buffer.h
@@ -747,6 +742,12 @@ filegroups:
   - include/grpc++/impl/codegen/time.h
   uses:
   - grpc_codegen
+- name: grpc++_codegen_base_src
+  language: c++
+  src:
+  - src/cpp/codegen/codegen_init.cc
+  uses:
+  - grpc++_codegen_base
 - name: grpc++_codegen_proto
   language: c++
   public_headers:
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index fd522ee1739..1d73434f3dc 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -5607,19 +5607,6 @@
     "third_party": false, 
     "type": "filegroup"
   }, 
-  {
-    "deps": [
-      "grpc++_codegen_base"
-    ], 
-    "headers": [], 
-    "language": "c", 
-    "name": "grpc++_codegen_base_src", 
-    "src": [
-      "src/cpp/codegen/codegen_init.cc"
-    ], 
-    "third_party": false, 
-    "type": "filegroup"
-  }, 
   {
     "deps": [
       "gpr", 
@@ -6636,6 +6623,19 @@
     "third_party": false, 
     "type": "filegroup"
   }, 
+  {
+    "deps": [
+      "grpc++_codegen_base"
+    ], 
+    "headers": [], 
+    "language": "c++", 
+    "name": "grpc++_codegen_base_src", 
+    "src": [
+      "src/cpp/codegen/codegen_init.cc"
+    ], 
+    "third_party": false, 
+    "type": "filegroup"
+  }, 
   {
     "deps": [
       "grpc++_codegen_base", 

From 773a8825bcb9cae06af18263b112b8f8fd96f10d Mon Sep 17 00:00:00 2001
From: yang-g <yangg@google.com>
Date: Mon, 13 Jun 2016 11:09:29 -0700
Subject: [PATCH 059/280] Minor fixes

---
 src/core/lib/iomgr/udp_server.c | 4 ++--
 src/cpp/server/server_posix.cc  | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/core/lib/iomgr/udp_server.c b/src/core/lib/iomgr/udp_server.c
index 16150687d3d..1ebccf2ee2e 100644
--- a/src/core/lib/iomgr/udp_server.c
+++ b/src/core/lib/iomgr/udp_server.c
@@ -243,13 +243,13 @@ static int prepare_socket(int fd, const struct sockaddr *addr,
 
   if (!grpc_set_socket_sndbuf(fd, buffer_size_bytes)) {
     gpr_log(GPR_ERROR, "Failed to set send buffer size to %d bytes",
-            buf_size_bytes);
+            buffer_size_bytes);
     goto error;
   }
 
   if (!grpc_set_socket_rcvbuf(fd, buffer_size_bytes)) {
     gpr_log(GPR_ERROR, "Failed to set receive buffer size to %d bytes",
-            buf_size_bytes);
+            buffer_size_bytes);
     goto error;
   }
 
diff --git a/src/cpp/server/server_posix.cc b/src/cpp/server/server_posix.cc
index 8cb9753a125..c3aa2adc60e 100644
--- a/src/cpp/server/server_posix.cc
+++ b/src/cpp/server/server_posix.cc
@@ -42,8 +42,8 @@ namespace grpc {
 void AddInsecureChannelFromFd(Server* server, int fd) {
   grpc_server_add_insecure_channel_from_fd(
       server->c_server(), server->completion_queue()->cq(), fd);
+}
 
 #endif  // GPR_SUPPORT_CHANNELS_FROM_FD
-}
 
 }  // namespace grpc

From 41622a8e389e8eda38d6d3bfbf34cbf35f437156 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Mon, 13 Jun 2016 16:43:14 -0700
Subject: [PATCH 060/280] Fix tsan failures

---
 Makefile                            |  1 +
 build.yaml                          |  1 +
 src/core/lib/iomgr/ev_epoll_linux.c | 27 ++++++++++++++++++++++++++-
 3 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 4d8b060760a..28d6842c76c 100644
--- a/Makefile
+++ b/Makefile
@@ -200,6 +200,7 @@ LD_tsan = clang
 LDXX_tsan = clang++
 CPPFLAGS_tsan = -O0 -fsanitize=thread -fno-omit-frame-pointer -Wno-unused-command-line-argument -DGPR_NO_DIRECT_SYSCALLS
 LDFLAGS_tsan = -fsanitize=thread
+DEFINES_tsan = _GRPC_TSAN
 DEFINES_tsan += GRPC_TEST_SLOWDOWN_BUILD_FACTOR=5
 
 VALID_CONFIG_stapprof = 1
diff --git a/build.yaml b/build.yaml
index 85b66d985bb..139ab3e8bca 100644
--- a/build.yaml
+++ b/build.yaml
@@ -3231,6 +3231,7 @@ configs:
     CPPFLAGS: -O0 -fsanitize=thread -fno-omit-frame-pointer -Wno-unused-command-line-argument
       -DGPR_NO_DIRECT_SYSCALLS
     CXX: clang++
+    DEFINES: _GRPC_TSAN
     LD: clang
     LDFLAGS: -fsanitize=thread
     LDXX: clang++
diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index a8a874cd4b0..35a15e00c96 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -236,6 +236,17 @@ static grpc_wakeup_fd polling_island_wakeup_fd;
 static gpr_mu g_pi_freelist_mu;
 static polling_island *g_pi_freelist = NULL;
 
+#ifdef _GRPC_TSAN
+/* Currently TSAN may incorrectly flag data races between epoll_ctl and
+   epoll_wait for any grpc_fd structs that are added to the epoll set via
+   epoll_ctl and are returned (within a very short window) via epoll_wait().
+
+   To work-around this race, we establish a happens-before relation between
+   the code just-before epoll_ctl() and the code after epoll_wait() by using
+   this atomic */
+gpr_atm g_epoll_sync;
+#endif
+
 /* The caller is expected to hold pi->mu lock before calling this function */
 static void polling_island_add_fds_locked(polling_island *pi, grpc_fd **fds,
                                           size_t fd_count, bool add_fd_refs) {
@@ -243,6 +254,11 @@ static void polling_island_add_fds_locked(polling_island *pi, grpc_fd **fds,
   size_t i;
   struct epoll_event ev;
 
+#ifdef _GRPC_TSAN
+  /* See the definition of g_epoll_sync for more context */
+  gpr_atm_rel_store(&g_epoll_sync, 0);
+#endif
+
   for (i = 0; i < fd_count; i++) {
     ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET);
     ev.data.ptr = fds[i];
@@ -361,6 +377,7 @@ static polling_island *polling_island_create(grpc_fd *initial_fd,
   }
 
   pi->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
+
   if (pi->epoll_fd < 0) {
     gpr_log(GPR_ERROR, "epoll_create1() failed with error: %s",
             strerror(errno));
@@ -1144,6 +1161,11 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
       }
     }
 
+#ifdef _GRPC_TSAN
+    /* See the definition of g_poll_sync for more details */
+    gpr_atm_acq_load(&g_epoll_sync);
+#endif
+
     for (int i = 0; i < ep_rv; ++i) {
       void *data_ptr = ep_ev[i].data.ptr;
       if (data_ptr == &grpc_global_wakeup_fd) {
@@ -1514,10 +1536,13 @@ const grpc_event_engine_vtable *grpc_init_epoll_linux(void) {
   return &vtable;
 }
 
-#else  /* defined(GPR_LINUX_EPOLL) */
+#else /* defined(GPR_LINUX_EPOLL) */
+#if defined(GPR_POSIX_SOCKET)
+#include "src/core/lib/iomgr/ev_posix.h"
 /* If GPR_LINUX_EPOLL is not defined, it means epoll is not available. Return
  * NULL */
 const grpc_event_engine_vtable *grpc_init_epoll_linux(void) { return NULL; }
+#endif /* defined(GPR_POSIX_SOCKET) */
 
 void grpc_use_signal(int signum) {}
 #endif /* !defined(GPR_LINUX_EPOLL) */

From ad2c4778fc560f10f38550428189c97c9e2bc5a1 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Mon, 13 Jun 2016 19:06:54 -0700
Subject: [PATCH 061/280] Rename _GRPC_TSAN to GRPC_TSAN

---
 Makefile                            |  2 +-
 build.yaml                          |  2 +-
 src/core/lib/iomgr/ev_epoll_linux.c | 12 ++++++------
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/Makefile b/Makefile
index 040ebd4102b..e35e360785b 100644
--- a/Makefile
+++ b/Makefile
@@ -200,7 +200,7 @@ LD_tsan = clang
 LDXX_tsan = clang++
 CPPFLAGS_tsan = -O0 -fsanitize=thread -fno-omit-frame-pointer -Wno-unused-command-line-argument -DGPR_NO_DIRECT_SYSCALLS
 LDFLAGS_tsan = -fsanitize=thread
-DEFINES_tsan = _GRPC_TSAN
+DEFINES_tsan = GRPC_TSAN
 DEFINES_tsan += GRPC_TEST_SLOWDOWN_BUILD_FACTOR=5
 
 VALID_CONFIG_stapprof = 1
diff --git a/build.yaml b/build.yaml
index 0847232b504..3d327f8bffd 100644
--- a/build.yaml
+++ b/build.yaml
@@ -3266,7 +3266,7 @@ configs:
     CPPFLAGS: -O0 -fsanitize=thread -fno-omit-frame-pointer -Wno-unused-command-line-argument
       -DGPR_NO_DIRECT_SYSCALLS
     CXX: clang++
-    DEFINES: _GRPC_TSAN
+    DEFINES: GRPC_TSAN
     LD: clang
     LDFLAGS: -fsanitize=thread
     LDXX: clang++
diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 35a15e00c96..006c2a8ee7f 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -236,7 +236,7 @@ static grpc_wakeup_fd polling_island_wakeup_fd;
 static gpr_mu g_pi_freelist_mu;
 static polling_island *g_pi_freelist = NULL;
 
-#ifdef _GRPC_TSAN
+#ifdef GRPC_TSAN
 /* Currently TSAN may incorrectly flag data races between epoll_ctl and
    epoll_wait for any grpc_fd structs that are added to the epoll set via
    epoll_ctl and are returned (within a very short window) via epoll_wait().
@@ -245,7 +245,7 @@ static polling_island *g_pi_freelist = NULL;
    the code just-before epoll_ctl() and the code after epoll_wait() by using
    this atomic */
 gpr_atm g_epoll_sync;
-#endif
+#endif /* defined(GRPC_TSAN) */
 
 /* The caller is expected to hold pi->mu lock before calling this function */
 static void polling_island_add_fds_locked(polling_island *pi, grpc_fd **fds,
@@ -254,10 +254,10 @@ static void polling_island_add_fds_locked(polling_island *pi, grpc_fd **fds,
   size_t i;
   struct epoll_event ev;
 
-#ifdef _GRPC_TSAN
+#ifdef GRPC_TSAN
   /* See the definition of g_epoll_sync for more context */
   gpr_atm_rel_store(&g_epoll_sync, 0);
-#endif
+#endif /* defined(GRPC_TSAN) */
 
   for (i = 0; i < fd_count; i++) {
     ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET);
@@ -1161,10 +1161,10 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
       }
     }
 
-#ifdef _GRPC_TSAN
+#ifdef GRPC_TSAN
     /* See the definition of g_poll_sync for more details */
     gpr_atm_acq_load(&g_epoll_sync);
-#endif
+#endif /* defined(GRPC_TSAN) */
 
     for (int i = 0; i < ep_rv; ++i) {
       void *data_ptr = ep_ev[i].data.ptr;

From ec4359ddc1b905b12784babfcb4cebb3a1e67478 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Mon, 11 Apr 2016 20:55:44 -0700
Subject: [PATCH 062/280] add support for CoreCLR

---
 src/csharp/.gitignore                         |  2 +
 src/csharp/Grpc.Auth/Grpc.Auth.xproj          | 19 ++++
 src/csharp/Grpc.Auth/project.json             | 35 +++++++
 .../Grpc.Core.Tests/Grpc.Core.Tests.xproj     | 19 ++++
 .../Grpc.Core.Tests/NUnitVersionTest.cs       |  2 +-
 src/csharp/Grpc.Core.Tests/SanityTest.cs      |  2 +
 src/csharp/Grpc.Core.Tests/project.json       | 28 ++++++
 src/csharp/Grpc.Core/Grpc.Core.csproj         |  2 +-
 src/csharp/Grpc.Core/Grpc.Core.nuspec         | 12 +--
 src/csharp/Grpc.Core/Grpc.Core.xproj          | 19 ++++
 .../Internal/DefaultSslRootsOverride.cs       |  2 +-
 .../Grpc.Core/Internal/NativeExtension.cs     |  2 +-
 src/csharp/Grpc.Core/Internal/PlatformApis.cs |  2 +-
 .../Internal/SafeHandleZeroIsInvalid.cs       |  2 +-
 src/csharp/Grpc.Core/project.json             | 56 +++++++++++
 src/csharp/Grpc.Dnx.sln                       | 94 +++++++++++++++++++
 .../Grpc.Examples.MathClient.xproj            | 19 ++++
 .../Grpc.Examples.MathClient/project.json     | 26 +++++
 .../Grpc.Examples.MathServer.xproj            | 19 ++++
 .../Grpc.Examples.MathServer/project.json     | 26 +++++
 .../Grpc.Examples.Tests.xproj                 | 19 ++++
 .../MathClientServerTests.cs                  |  8 +-
 src/csharp/Grpc.Examples.Tests/project.json   | 28 ++++++
 src/csharp/Grpc.Examples/Grpc.Examples.xproj  | 19 ++++
 src/csharp/Grpc.Examples/project.json         | 24 +++++
 .../Grpc.HealthCheck.Tests.xproj              | 19 ++++
 .../Grpc.HealthCheck.Tests/project.json       | 28 ++++++
 .../Grpc.HealthCheck/Grpc.HealthCheck.xproj   | 19 ++++
 src/csharp/Grpc.HealthCheck/project.json      | 32 +++++++
 .../Grpc.IntegrationTesting.Client.xproj      | 19 ++++
 .../project.json                              | 15 +++
 .../Grpc.IntegrationTesting.QpsWorker.xproj   | 19 ++++
 .../project.json                              | 15 +++
 .../Grpc.IntegrationTesting.Server.xproj      | 19 ++++
 .../project.json                              | 15 +++
 .../Grpc.IntegrationTesting.xproj             | 19 ++++
 .../Grpc.IntegrationTesting/project.json      | 21 +++++
 src/csharp/build_packages.bat                 | 12 +--
 .../grpc.native.csharp.nuspec                 | 27 ------
 .../src/csharp/build_packages.bat.template    | 12 +--
 40 files changed, 722 insertions(+), 55 deletions(-)
 create mode 100644 src/csharp/Grpc.Auth/Grpc.Auth.xproj
 create mode 100644 src/csharp/Grpc.Auth/project.json
 create mode 100644 src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.xproj
 create mode 100644 src/csharp/Grpc.Core.Tests/project.json
 create mode 100644 src/csharp/Grpc.Core/Grpc.Core.xproj
 create mode 100644 src/csharp/Grpc.Core/project.json
 create mode 100644 src/csharp/Grpc.Dnx.sln
 create mode 100644 src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.xproj
 create mode 100644 src/csharp/Grpc.Examples.MathClient/project.json
 create mode 100644 src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.xproj
 create mode 100644 src/csharp/Grpc.Examples.MathServer/project.json
 create mode 100644 src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.xproj
 create mode 100644 src/csharp/Grpc.Examples.Tests/project.json
 create mode 100644 src/csharp/Grpc.Examples/Grpc.Examples.xproj
 create mode 100644 src/csharp/Grpc.Examples/project.json
 create mode 100644 src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.xproj
 create mode 100644 src/csharp/Grpc.HealthCheck.Tests/project.json
 create mode 100644 src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.xproj
 create mode 100644 src/csharp/Grpc.HealthCheck/project.json
 create mode 100644 src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.xproj
 create mode 100644 src/csharp/Grpc.IntegrationTesting.Client/project.json
 create mode 100644 src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.xproj
 create mode 100644 src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
 create mode 100644 src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.xproj
 create mode 100644 src/csharp/Grpc.IntegrationTesting.Server/project.json
 create mode 100644 src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.xproj
 create mode 100644 src/csharp/Grpc.IntegrationTesting/project.json
 delete mode 100644 src/csharp/grpc.native.csharp/grpc.native.csharp.nuspec

diff --git a/src/csharp/.gitignore b/src/csharp/.gitignore
index 0f96a482219..fc2875a1dd5 100644
--- a/src/csharp/.gitignore
+++ b/src/csharp/.gitignore
@@ -1,5 +1,7 @@
+*.xproj.user
 *.userprefs
 *.csproj.user
+*.lock.json
 StyleCop.Cache
 test-results
 packages
diff --git a/src/csharp/Grpc.Auth/Grpc.Auth.xproj b/src/csharp/Grpc.Auth/Grpc.Auth.xproj
new file mode 100644
index 00000000000..c3a6fa2947b
--- /dev/null
+++ b/src/csharp/Grpc.Auth/Grpc.Auth.xproj
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0.25123" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0.25123</VisualStudioVersion>
+    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.Props" Condition="'$(VSToolsPath)' != ''" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>c82631ed-06d1-4458-87bc-8257d12307a8</ProjectGuid>
+    <RootNamespace>Grpc.Auth</RootNamespace>
+    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\Grpc.Core\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">..\Grpc.Core\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <SchemaVersion>2.0</SchemaVersion>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.targets" Condition="'$(VSToolsPath)' != ''" />
+</Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Auth/project.json b/src/csharp/Grpc.Auth/project.json
new file mode 100644
index 00000000000..513325f7491
--- /dev/null
+++ b/src/csharp/Grpc.Auth/project.json
@@ -0,0 +1,35 @@
+{
+  "version": "0.14.0-anexperiment",
+  
+  "title": "gRPC C# Auth",
+  "summary": "Auth library for C# implementation of gRPC - an RPC library and framework",
+  "description": "Auth library for C# implementation of gRPC - an RPC library and framework. See project site for more info.",
+  "authors": ["Google Inc."],
+  "owners": ["grpc-packages"],
+  "licenseUrl": "https://github.com/grpc/grpc/blob/master/LICENSE",
+  "projectUrl": "https://github.com/grpc/grpc",
+  "requireLicenseAcceptance": false,
+  "copyright": "Copyright 2015, Google Inc.",
+  "tags": ["gRPC RPC Protocol HTTP/2 Auth OAuth2"],
+  
+  "compile": "**/*.cs",
+  "resourceFiles": ["../../../etc/roots.pem"],
+
+  "dependencies": {
+    "Grpc.Core": "0.14.0-anexperiment",
+    "Google.Apis.Auth": "1.11.1"
+  },
+  "frameworks": {
+    "net45": { },
+    "dotnet54": {
+      "imports": [
+        "net45"
+      ],
+      "dependencies": {
+        "Microsoft.CSharp": "4.0.1-beta-23516",
+        "Microsoft.NETCore.Portable.Compatibility": "1.0.1-beta-23516",
+        "System.Threading.Tasks":  "4.0.11-beta-23516"
+      }
+    }
+  }
+}
diff --git a/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.xproj b/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.xproj
new file mode 100644
index 00000000000..e6595118fb1
--- /dev/null
+++ b/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.xproj
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0.25123" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0.25123</VisualStudioVersion>
+    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.Props" Condition="'$(VSToolsPath)' != ''" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>759e23b2-fc04-4695-902d-b073cded3599</ProjectGuid>
+    <RootNamespace>Grpc.Core.Tests</RootNamespace>
+    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <SchemaVersion>2.0</SchemaVersion>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.targets" Condition="'$(VSToolsPath)' != ''" />
+</Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Core.Tests/NUnitVersionTest.cs b/src/csharp/Grpc.Core.Tests/NUnitVersionTest.cs
index 3fa6ad09c02..1a9e441611d 100644
--- a/src/csharp/Grpc.Core.Tests/NUnitVersionTest.cs
+++ b/src/csharp/Grpc.Core.Tests/NUnitVersionTest.cs
@@ -56,7 +56,7 @@ namespace Grpc.Core.Tests
                 Console.Error.WriteLine("You are using and old version of NUnit that doesn't support async tests and skips them instead. " +
                 "This test has failed to indicate that.");
                 Console.Error.Flush();
-                Environment.Exit(1);
+                throw new Exception("NUnitVersionTest has failed.");
             }
         }
 
diff --git a/src/csharp/Grpc.Core.Tests/SanityTest.cs b/src/csharp/Grpc.Core.Tests/SanityTest.cs
index 3830f0cbacf..9e995d40c03 100644
--- a/src/csharp/Grpc.Core.Tests/SanityTest.cs
+++ b/src/csharp/Grpc.Core.Tests/SanityTest.cs
@@ -45,6 +45,7 @@ namespace Grpc.Core.Tests
 {
     public class SanityTest
     {
+#if !DOTNET5_4
         /// <summary>
         /// Because we depend on a native library, sometimes when things go wrong, the
         /// entire NUnit test process crashes. To be able to track down problems better,
@@ -121,5 +122,6 @@ namespace Grpc.Core.Tests
             }
             return result;
         }
+#endif
     }
 }
diff --git a/src/csharp/Grpc.Core.Tests/project.json b/src/csharp/Grpc.Core.Tests/project.json
new file mode 100644
index 00000000000..0c5d9354358
--- /dev/null
+++ b/src/csharp/Grpc.Core.Tests/project.json
@@ -0,0 +1,28 @@
+{
+  "compile": "**/*.cs",
+  "compilationOptions": {
+    "emitEntryPoint": true
+  },
+
+  "content": "../nativelibs/**",
+
+  "dependencies": {
+    "Grpc.Core": "0.14.0-anexperiment",
+    "NUnit": "3.2.0",
+    "NUnitLite": "3.2.0-*"
+  },
+  "frameworks": {
+    "net45": { },
+    "dotnet54": {
+      "imports": [
+        "portable-net45"
+      ],
+      "dependencies": {
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.0.0-rc2-23931"
+        }
+      }
+    }
+  }
+}
diff --git a/src/csharp/Grpc.Core/Grpc.Core.csproj b/src/csharp/Grpc.Core/Grpc.Core.csproj
index a796911b99f..e460f004473 100644
--- a/src/csharp/Grpc.Core/Grpc.Core.csproj
+++ b/src/csharp/Grpc.Core/Grpc.Core.csproj
@@ -148,7 +148,7 @@
   <ItemGroup />
   <ItemGroup>
     <EmbeddedResource Include="..\..\..\etc\roots.pem">
-      <Link>Resources\roots.pem</Link>
+      <Link>roots.pem</Link>
     </EmbeddedResource>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Core/Grpc.Core.nuspec b/src/csharp/Grpc.Core/Grpc.Core.nuspec
index 0ada0049c2a..fa2c1fbff22 100644
--- a/src/csharp/Grpc.Core/Grpc.Core.nuspec
+++ b/src/csharp/Grpc.Core/Grpc.Core.nuspec
@@ -24,11 +24,11 @@
     <file src="bin/ReleaseSigned/Grpc.Core.xml" target="lib/net45" />
     <file src="**\*.cs" target="src" />
     <file src="Grpc.Core.targets" target="\build\net45\Grpc.Core.targets" />
-    <file src="windows_x86/grpc_csharp_ext.dll" target="/build/native/bin/windows_x86/grpc_csharp_ext.dll" />
-    <file src="windows_x64/grpc_csharp_ext.dll" target="/build/native/bin/windows_x64/grpc_csharp_ext.dll" />
-    <file src="linux_x86/libgrpc_csharp_ext.so" target="/build/native/bin/linux_x86/libgrpc_csharp_ext.so" />
-    <file src="linux_x64/libgrpc_csharp_ext.so" target="/build/native/bin/linux_x64/libgrpc_csharp_ext.so" />
-    <file src="macosx_x86/libgrpc_csharp_ext.dylib" target="/build/native/bin/macosx_x86/libgrpc_csharp_ext.dylib" />
-    <file src="macosx_x64/libgrpc_csharp_ext.dylib" target="/build/native/bin/macosx_x64/libgrpc_csharp_ext.dylib" />
+    <file src="../nativelibs/windows_x86/grpc_csharp_ext.dll" target="/build/native/bin/windows_x86/grpc_csharp_ext.dll" />
+    <file src="../nativelibs/windows_x64/grpc_csharp_ext.dll" target="/build/native/bin/windows_x64/grpc_csharp_ext.dll" />
+    <file src="../nativelibs/linux_x86/libgrpc_csharp_ext.so" target="/build/native/bin/linux_x86/libgrpc_csharp_ext.so" />
+    <file src="../nativelibs/linux_x64/libgrpc_csharp_ext.so" target="/build/native/bin/linux_x64/libgrpc_csharp_ext.so" />
+    <file src="../nativelibs/macosx_x86/libgrpc_csharp_ext.dylib" target="/build/native/bin/macosx_x86/libgrpc_csharp_ext.dylib" />
+    <file src="../nativelibs/macosx_x64/libgrpc_csharp_ext.dylib" target="/build/native/bin/macosx_x64/libgrpc_csharp_ext.dylib" />
   </files>
 </package>
diff --git a/src/csharp/Grpc.Core/Grpc.Core.xproj b/src/csharp/Grpc.Core/Grpc.Core.xproj
new file mode 100644
index 00000000000..f5d1bf2eef5
--- /dev/null
+++ b/src/csharp/Grpc.Core/Grpc.Core.xproj
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0</VisualStudioVersion>
+    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.Props" Condition="'$(VSToolsPath)' != ''" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>dc9908b6-f291-4fc8-a46d-2ea2551790ec</ProjectGuid>
+    <RootNamespace>Grpc.Core</RootNamespace>
+    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <SchemaVersion>2.0</SchemaVersion>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.targets" Condition="'$(VSToolsPath)' != ''" />
+</Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Core/Internal/DefaultSslRootsOverride.cs b/src/csharp/Grpc.Core/Internal/DefaultSslRootsOverride.cs
index aa4dafd7f2a..2a96e9920c0 100644
--- a/src/csharp/Grpc.Core/Internal/DefaultSslRootsOverride.cs
+++ b/src/csharp/Grpc.Core/Internal/DefaultSslRootsOverride.cs
@@ -46,7 +46,7 @@ namespace Grpc.Core.Internal
     /// </summary>
     internal static class DefaultSslRootsOverride
     {
-        const string RootsPemResourceName = "Grpc.Core.Resources.roots.pem";
+        const string RootsPemResourceName = "Grpc.Core.roots.pem";
         static object staticLock = new object();
 
         /// <summary>
diff --git a/src/csharp/Grpc.Core/Internal/NativeExtension.cs b/src/csharp/Grpc.Core/Internal/NativeExtension.cs
index b45ba19c24d..6c219621df5 100644
--- a/src/csharp/Grpc.Core/Internal/NativeExtension.cs
+++ b/src/csharp/Grpc.Core/Internal/NativeExtension.cs
@@ -118,7 +118,7 @@ namespace Grpc.Core.Internal
         {
             var assembly = typeof(NativeExtension).GetTypeInfo().Assembly;
 #if DOTNET5_4
-            // Assembly.EscapedCodeBase does not exit under CoreCLR, but assemblies imported from a nuget package
+            // Assembly.EscapedCodeBase does not exist under CoreCLR, but assemblies imported from a nuget package
             // don't seem to be shadowed by DNX-based projects at all.
             return assembly.Location;
 #else
diff --git a/src/csharp/Grpc.Core/Internal/PlatformApis.cs b/src/csharp/Grpc.Core/Internal/PlatformApis.cs
index 5d8c44b589e..3331a1f9fac 100644
--- a/src/csharp/Grpc.Core/Internal/PlatformApis.cs
+++ b/src/csharp/Grpc.Core/Internal/PlatformApis.cs
@@ -53,7 +53,7 @@ namespace Grpc.Core.Internal
 
         static PlatformApis()
         {
-#if DNXCORE50
+#if DOTNET5_4
             isLinux = RuntimeInformation.IsOSPlatform(OSPlatform.Linux);
             isMacOSX = RuntimeInformation.IsOSPlatform(OSPlatform.OSX);
             isWindows = RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
diff --git a/src/csharp/Grpc.Core/Internal/SafeHandleZeroIsInvalid.cs b/src/csharp/Grpc.Core/Internal/SafeHandleZeroIsInvalid.cs
index 702aea2883a..230faacff63 100644
--- a/src/csharp/Grpc.Core/Internal/SafeHandleZeroIsInvalid.cs
+++ b/src/csharp/Grpc.Core/Internal/SafeHandleZeroIsInvalid.cs
@@ -39,7 +39,7 @@ namespace Grpc.Core.Internal
     /// <summary>
     /// Safe handle to wrap native objects.
     /// </summary>
-    internal abstract class SafeHandleZeroIsInvalid : SafeHandle
+    internal abstract class SafeHandleZeroIsInvalid : System.Runtime.InteropServices.SafeHandle
     {
         public SafeHandleZeroIsInvalid() : base(IntPtr.Zero, true)
         {
diff --git a/src/csharp/Grpc.Core/project.json b/src/csharp/Grpc.Core/project.json
new file mode 100644
index 00000000000..8aece57856c
--- /dev/null
+++ b/src/csharp/Grpc.Core/project.json
@@ -0,0 +1,56 @@
+{
+  "version": "0.14.0-anexperiment",
+
+  "title": "gRPC C# Core",
+  "summary": "Core C# implementation of gRPC - an RPC library and framework",
+  "description": "Core C# implementation of gRPC - an RPC library and framework. See project site for more info.",
+  "authors": [ "Google Inc." ],
+  "owners": [ "grpc-packages" ],
+  "licenseUrl": "https://github.com/grpc/grpc/blob/master/LICENSE",
+  "projectUrl": "https://github.com/grpc/grpc",
+  "requireLicenseAcceptance": false,
+  "copyright": "Copyright 2015, Google Inc.",
+  "tags": [ "gRPC RPC Protocol HTTP/2" ],
+
+  "compile": "**/*.cs",
+  "resourceFiles": [ "../../../etc/roots.pem" ],
+
+  "content": "../nativelibs/**",
+
+  "packInclude": {
+    "build/net45/": "Grpc.Core.targets",
+    "build/native/bin/windows_x86/": "../nativelibs/windows_x86/grpc_csharp_ext.dll",
+    "build/native/bin/windows_x64/": "../nativelibs/windows_x64/grpc_csharp_ext.dll",
+    "build/native/bin/linux_x86/": "../nativelibs/linux_x86/libgrpc_csharp_ext.so",
+    "build/native/bin/linux_x64/": "../nativelibs/linux_x64/libgrpc_csharp_ext.so",
+    "build/native/bin/macosx_x86/": "../nativelibs/macosx_x86/libgrpc_csharp_ext.dylib",
+    "build/native/bin/macosx_x64/": "../nativelibs/macosx_x64/libgrpc_csharp_ext.dylib"
+  },
+
+  "dependencies": {
+    "Ix-Async": "1.2.5"
+  },
+  "frameworks": {
+    "net45": { },
+    "dotnet54": {
+      "imports": [
+        "portable-net45"
+      ],
+      "dependencies": {
+        "Microsoft.CSharp": "4.0.1-beta-23516",
+        "System.Collections": "4.0.11-beta-23516",
+        "System.Collections.Concurrent": "4.0.11-beta-23516",
+        "System.Console": "4.0.0-beta-23516",
+        "System.Linq": "4.0.1-beta-23516",
+        "System.Threading": "4.0.11-beta-23516",
+        "System.Threading.Thread": "4.0.0-beta-23516",
+        "System.Reflection": "4.1.0-beta-23516",
+        "System.Text.Encoding": "4.0.11-beta-23516",
+        "System.Text.RegularExpressions": "4.0.11-beta-23516",
+        "System.IO": "4.0.11-beta-23516",
+        "System.IO.FileSystem": "4.0.1-beta-23516",
+        "System.Runtime.InteropServices.RuntimeInformation": "4.0.0-beta-23516"
+      }
+    }
+  }
+}
diff --git a/src/csharp/Grpc.Dnx.sln b/src/csharp/Grpc.Dnx.sln
new file mode 100644
index 00000000000..6a7e2e27482
--- /dev/null
+++ b/src/csharp/Grpc.Dnx.sln
@@ -0,0 +1,94 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 14
+VisualStudioVersion = 14.0.25123.0
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Grpc.Core", "Grpc.Core\Grpc.Core.xproj", "{DC9908B6-F291-4FC8-A46D-2EA2551790EC}"
+EndProject
+Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Grpc.Auth", "Grpc.Auth\Grpc.Auth.xproj", "{C82631ED-06D1-4458-87BC-8257D12307A8}"
+EndProject
+Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Grpc.Core.Tests", "Grpc.Core.Tests\Grpc.Core.Tests.xproj", "{759E23B2-FC04-4695-902D-B073CDED3599}"
+EndProject
+Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Grpc.Examples", "Grpc.Examples\Grpc.Examples.xproj", "{C77B792D-FC78-4CE2-9522-B40B0803C636}"
+EndProject
+Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Grpc.Examples.MathClient", "Grpc.Examples.MathClient\Grpc.Examples.MathClient.xproj", "{FD48DECA-1622-4173-B1D9-2101CF5E7C5F}"
+EndProject
+Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Grpc.Examples.MathServer", "Grpc.Examples.MathServer\Grpc.Examples.MathServer.xproj", "{58579368-5372-4E67-ACD6-9B59CB9FA698}"
+EndProject
+Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Grpc.Examples.Tests", "Grpc.Examples.Tests\Grpc.Examples.Tests.xproj", "{C61714A6-F633-44FB-97F4-C91F425C1D15}"
+EndProject
+Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Grpc.HealthCheck", "Grpc.HealthCheck\Grpc.HealthCheck.xproj", "{3BE4AD0B-2BF0-4D68-B625-F6018EF0DCFA}"
+EndProject
+Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Grpc.HealthCheck.Tests", "Grpc.HealthCheck.Tests\Grpc.HealthCheck.Tests.xproj", "{43DAFAC6-5343-4621-960E-A8A977EA3F0B}"
+EndProject
+Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Grpc.IntegrationTesting", "Grpc.IntegrationTesting\Grpc.IntegrationTesting.xproj", "{20354386-3E71-4046-A269-3BC2A06F3EC8}"
+EndProject
+Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Grpc.IntegrationTesting.Client", "Grpc.IntegrationTesting.Client\Grpc.IntegrationTesting.Client.xproj", "{48EA5BBE-70E2-4198-869D-D7E59C45F30D}"
+EndProject
+Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Grpc.IntegrationTesting.QpsWorker", "Grpc.IntegrationTesting.QpsWorker\Grpc.IntegrationTesting.QpsWorker.xproj", "{661B70D7-F56A-46E0-9B81-6227B591B5E7}"
+EndProject
+Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Grpc.IntegrationTesting.Server", "Grpc.IntegrationTesting.Server\Grpc.IntegrationTesting.Server.xproj", "{881F7AD1-A84E-47A2-9402-115C63C4031E}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{DC9908B6-F291-4FC8-A46D-2EA2551790EC}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{DC9908B6-F291-4FC8-A46D-2EA2551790EC}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{DC9908B6-F291-4FC8-A46D-2EA2551790EC}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{DC9908B6-F291-4FC8-A46D-2EA2551790EC}.Release|Any CPU.Build.0 = Release|Any CPU
+		{C82631ED-06D1-4458-87BC-8257D12307A8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{C82631ED-06D1-4458-87BC-8257D12307A8}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{C82631ED-06D1-4458-87BC-8257D12307A8}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{C82631ED-06D1-4458-87BC-8257D12307A8}.Release|Any CPU.Build.0 = Release|Any CPU
+		{759E23B2-FC04-4695-902D-B073CDED3599}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{759E23B2-FC04-4695-902D-B073CDED3599}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{759E23B2-FC04-4695-902D-B073CDED3599}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{759E23B2-FC04-4695-902D-B073CDED3599}.Release|Any CPU.Build.0 = Release|Any CPU
+		{C77B792D-FC78-4CE2-9522-B40B0803C636}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{C77B792D-FC78-4CE2-9522-B40B0803C636}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{C77B792D-FC78-4CE2-9522-B40B0803C636}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{C77B792D-FC78-4CE2-9522-B40B0803C636}.Release|Any CPU.Build.0 = Release|Any CPU
+		{FD48DECA-1622-4173-B1D9-2101CF5E7C5F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{FD48DECA-1622-4173-B1D9-2101CF5E7C5F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{FD48DECA-1622-4173-B1D9-2101CF5E7C5F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{FD48DECA-1622-4173-B1D9-2101CF5E7C5F}.Release|Any CPU.Build.0 = Release|Any CPU
+		{58579368-5372-4E67-ACD6-9B59CB9FA698}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{58579368-5372-4E67-ACD6-9B59CB9FA698}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{58579368-5372-4E67-ACD6-9B59CB9FA698}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{58579368-5372-4E67-ACD6-9B59CB9FA698}.Release|Any CPU.Build.0 = Release|Any CPU
+		{C61714A6-F633-44FB-97F4-C91F425C1D15}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{C61714A6-F633-44FB-97F4-C91F425C1D15}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{C61714A6-F633-44FB-97F4-C91F425C1D15}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{C61714A6-F633-44FB-97F4-C91F425C1D15}.Release|Any CPU.Build.0 = Release|Any CPU
+		{3BE4AD0B-2BF0-4D68-B625-F6018EF0DCFA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{3BE4AD0B-2BF0-4D68-B625-F6018EF0DCFA}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{3BE4AD0B-2BF0-4D68-B625-F6018EF0DCFA}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{3BE4AD0B-2BF0-4D68-B625-F6018EF0DCFA}.Release|Any CPU.Build.0 = Release|Any CPU
+		{43DAFAC6-5343-4621-960E-A8A977EA3F0B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{43DAFAC6-5343-4621-960E-A8A977EA3F0B}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{43DAFAC6-5343-4621-960E-A8A977EA3F0B}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{43DAFAC6-5343-4621-960E-A8A977EA3F0B}.Release|Any CPU.Build.0 = Release|Any CPU
+		{20354386-3E71-4046-A269-3BC2A06F3EC8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{20354386-3E71-4046-A269-3BC2A06F3EC8}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{20354386-3E71-4046-A269-3BC2A06F3EC8}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{20354386-3E71-4046-A269-3BC2A06F3EC8}.Release|Any CPU.Build.0 = Release|Any CPU
+		{48EA5BBE-70E2-4198-869D-D7E59C45F30D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{48EA5BBE-70E2-4198-869D-D7E59C45F30D}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{48EA5BBE-70E2-4198-869D-D7E59C45F30D}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{48EA5BBE-70E2-4198-869D-D7E59C45F30D}.Release|Any CPU.Build.0 = Release|Any CPU
+		{661B70D7-F56A-46E0-9B81-6227B591B5E7}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{661B70D7-F56A-46E0-9B81-6227B591B5E7}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{661B70D7-F56A-46E0-9B81-6227B591B5E7}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{661B70D7-F56A-46E0-9B81-6227B591B5E7}.Release|Any CPU.Build.0 = Release|Any CPU
+		{881F7AD1-A84E-47A2-9402-115C63C4031E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{881F7AD1-A84E-47A2-9402-115C63C4031E}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{881F7AD1-A84E-47A2-9402-115C63C4031E}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{881F7AD1-A84E-47A2-9402-115C63C4031E}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal
diff --git a/src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.xproj b/src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.xproj
new file mode 100644
index 00000000000..a8dc195a6dc
--- /dev/null
+++ b/src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.xproj
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0.25123" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0.25123</VisualStudioVersion>
+    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.Props" Condition="'$(VSToolsPath)' != ''" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>fd48deca-1622-4173-b1d9-2101cf5e7c5f</ProjectGuid>
+    <RootNamespace>Grpc.Examples.MathClient</RootNamespace>
+    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <SchemaVersion>2.0</SchemaVersion>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.targets" Condition="'$(VSToolsPath)' != ''" />
+</Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Examples.MathClient/project.json b/src/csharp/Grpc.Examples.MathClient/project.json
new file mode 100644
index 00000000000..67af09721ce
--- /dev/null
+++ b/src/csharp/Grpc.Examples.MathClient/project.json
@@ -0,0 +1,26 @@
+{
+  "compile": "**/*.cs",
+  "compilationOptions": {
+    "emitEntryPoint": true
+  },
+
+  "content": "../nativelibs/**",
+
+  "dependencies": {
+    "Grpc.Examples": "1.0.0"
+  },
+  "frameworks": {
+    "net45": { },
+    "dotnet54": {
+      "imports": [
+        "portable-net45"
+      ],
+      "dependencies": {
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.0.0-rc2-23931"
+        }
+      }
+    }
+  }
+}
diff --git a/src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.xproj b/src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.xproj
new file mode 100644
index 00000000000..40746f1f946
--- /dev/null
+++ b/src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.xproj
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0.25123" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0.25123</VisualStudioVersion>
+    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.Props" Condition="'$(VSToolsPath)' != ''" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>58579368-5372-4e67-acd6-9b59cb9fa698</ProjectGuid>
+    <RootNamespace>Grpc.Examples.MathServer</RootNamespace>
+    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <SchemaVersion>2.0</SchemaVersion>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.targets" Condition="'$(VSToolsPath)' != ''" />
+</Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Examples.MathServer/project.json b/src/csharp/Grpc.Examples.MathServer/project.json
new file mode 100644
index 00000000000..67af09721ce
--- /dev/null
+++ b/src/csharp/Grpc.Examples.MathServer/project.json
@@ -0,0 +1,26 @@
+{
+  "compile": "**/*.cs",
+  "compilationOptions": {
+    "emitEntryPoint": true
+  },
+
+  "content": "../nativelibs/**",
+
+  "dependencies": {
+    "Grpc.Examples": "1.0.0"
+  },
+  "frameworks": {
+    "net45": { },
+    "dotnet54": {
+      "imports": [
+        "portable-net45"
+      ],
+      "dependencies": {
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.0.0-rc2-23931"
+        }
+      }
+    }
+  }
+}
diff --git a/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.xproj b/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.xproj
new file mode 100644
index 00000000000..c744816a811
--- /dev/null
+++ b/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.xproj
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0.25123" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0.25123</VisualStudioVersion>
+    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.Props" Condition="'$(VSToolsPath)' != ''" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>c61714a6-f633-44fb-97f4-c91f425c1d15</ProjectGuid>
+    <RootNamespace>Grpc.Examples.Tests</RootNamespace>
+    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <SchemaVersion>2.0</SchemaVersion>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.targets" Condition="'$(VSToolsPath)' != ''" />
+</Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Examples.Tests/MathClientServerTests.cs b/src/csharp/Grpc.Examples.Tests/MathClientServerTests.cs
index ee11105efe7..324c209ca1d 100644
--- a/src/csharp/Grpc.Examples.Tests/MathClientServerTests.cs
+++ b/src/csharp/Grpc.Examples.Tests/MathClientServerTests.cs
@@ -110,7 +110,7 @@ namespace Math.Tests
             {
                 var responses = await call.ResponseStream.ToListAsync();
                 CollectionAssert.AreEqual(new List<long> { 1, 1, 2, 3, 5, 8 },
-                    responses.ConvertAll((n) => n.Num_));
+                    responses.Select((n) => n.Num_));
             }
         }
 
@@ -162,7 +162,7 @@ namespace Math.Tests
         {
             using (var call = client.Sum())
             {
-                var numbers = new List<long> { 10, 20, 30 }.ConvertAll(n => new Num { Num_ = n });
+                var numbers = new List<long> { 10, 20, 30 }.Select(n => new Num { Num_ = n });
 
                 await call.RequestStream.WriteAllAsync(numbers);
                 var result = await call.ResponseAsync;
@@ -185,8 +185,8 @@ namespace Math.Tests
                 await call.RequestStream.WriteAllAsync(divArgsList);
                 var result = await call.ResponseStream.ToListAsync();
 
-                CollectionAssert.AreEqual(new long[] { 3, 4, 3 }, result.ConvertAll((divReply) => divReply.Quotient));
-                CollectionAssert.AreEqual(new long[] { 1, 16, 1 }, result.ConvertAll((divReply) => divReply.Remainder));
+                CollectionAssert.AreEqual(new long[] { 3, 4, 3 }, result.Select((divReply) => divReply.Quotient));
+                CollectionAssert.AreEqual(new long[] { 1, 16, 1 }, result.Select((divReply) => divReply.Remainder));
             }
         }
     }
diff --git a/src/csharp/Grpc.Examples.Tests/project.json b/src/csharp/Grpc.Examples.Tests/project.json
new file mode 100644
index 00000000000..e61aa65abfc
--- /dev/null
+++ b/src/csharp/Grpc.Examples.Tests/project.json
@@ -0,0 +1,28 @@
+{
+  "compile": "**/*.cs",
+  "compilationOptions": {
+    "emitEntryPoint": true
+  },
+
+  "content": "../nativelibs/**",
+
+  "dependencies": {
+    "Grpc.Examples": "1.0.0",
+    "NUnit": "3.2.0",
+    "NUnitLite": "3.2.0-*"
+  },
+  "frameworks": {
+    "net45": { },
+    "dotnet54": {
+      "imports": [
+        "portable-net45"
+      ],
+      "dependencies": {
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.0.0-rc2-23931"
+        }
+      }
+    }
+  }
+}
diff --git a/src/csharp/Grpc.Examples/Grpc.Examples.xproj b/src/csharp/Grpc.Examples/Grpc.Examples.xproj
new file mode 100644
index 00000000000..aa3ad680fd8
--- /dev/null
+++ b/src/csharp/Grpc.Examples/Grpc.Examples.xproj
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0.25123" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0.25123</VisualStudioVersion>
+    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.Props" Condition="'$(VSToolsPath)' != ''" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>c77b792d-fc78-4ce2-9522-b40b0803c636</ProjectGuid>
+    <RootNamespace>Grpc.Examples</RootNamespace>
+    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <SchemaVersion>2.0</SchemaVersion>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.targets" Condition="'$(VSToolsPath)' != ''" />
+</Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Examples/project.json b/src/csharp/Grpc.Examples/project.json
new file mode 100644
index 00000000000..c78de89cf89
--- /dev/null
+++ b/src/csharp/Grpc.Examples/project.json
@@ -0,0 +1,24 @@
+{
+  "compile": "**/*.cs",
+
+  "content": "../nativelibs/**",
+
+  "dependencies": {
+    "Grpc.Core": "0.0.1",
+    "Google.Protobuf": "3.0.0-beta2"
+  },
+  "frameworks": {
+    "net45": { },
+    "dotnet54": {
+      "imports": [
+        "portable-net45"
+      ],
+      "dependencies": {
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.0.0-rc2-23931"
+        }
+      }
+    }
+  }
+}
diff --git a/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.xproj b/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.xproj
new file mode 100644
index 00000000000..db05ccf7a4f
--- /dev/null
+++ b/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.xproj
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0.25123" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0.25123</VisualStudioVersion>
+    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.Props" Condition="'$(VSToolsPath)' != ''" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>43dafac6-5343-4621-960e-a8a977ea3f0b</ProjectGuid>
+    <RootNamespace>Grpc.HealthCheck.Tests</RootNamespace>
+    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <SchemaVersion>2.0</SchemaVersion>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.targets" Condition="'$(VSToolsPath)' != ''" />
+</Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.HealthCheck.Tests/project.json b/src/csharp/Grpc.HealthCheck.Tests/project.json
new file mode 100644
index 00000000000..5ecb17c9671
--- /dev/null
+++ b/src/csharp/Grpc.HealthCheck.Tests/project.json
@@ -0,0 +1,28 @@
+{
+  "compile": "**/*.cs",
+  "compilationOptions": {
+    "emitEntryPoint": true
+  },
+
+  "content": "../nativelibs/**",
+
+  "dependencies": {
+    "Grpc.HealthCheck": "1.0.0",
+    "NUnit": "3.2.0",
+    "NUnitLite": "3.2.0-*"
+  },
+  "frameworks": {
+    "net45": { },
+    "dotnet54": {
+      "imports": [
+        "portable-net45"
+      ],
+      "dependencies": {
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.0.0-rc2-23931"
+        }
+      }
+    }
+  }
+}
diff --git a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.xproj b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.xproj
new file mode 100644
index 00000000000..18701779d19
--- /dev/null
+++ b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.xproj
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0.25123" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0.25123</VisualStudioVersion>
+    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.Props" Condition="'$(VSToolsPath)' != ''" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>3be4ad0b-2bf0-4d68-b625-f6018ef0dcfa</ProjectGuid>
+    <RootNamespace>Grpc.HealthCheck</RootNamespace>
+    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <SchemaVersion>2.0</SchemaVersion>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.targets" Condition="'$(VSToolsPath)' != ''" />
+</Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.HealthCheck/project.json b/src/csharp/Grpc.HealthCheck/project.json
new file mode 100644
index 00000000000..0984d43deca
--- /dev/null
+++ b/src/csharp/Grpc.HealthCheck/project.json
@@ -0,0 +1,32 @@
+{
+  "version": "0.14.0-anexperiment",
+
+  "title": "gRPC C# Healthchecking",
+  "summary": "Implementation of gRPC health service",
+  "description": "Example implementation of grpc.health.v1 service that can be used for health-checking.",
+  "authors": [ "Google Inc." ],
+  "owners": [ "grpc-packages" ],
+  "licenseUrl": "https://github.com/grpc/grpc/blob/master/LICENSE",
+  "projectUrl": "https://github.com/grpc/grpc",
+  "requireLicenseAcceptance": false,
+  "copyright": "Copyright 2015, Google Inc.",
+  "tags": [ "gRPC health check" ],
+
+  "compile": "**/*.cs",
+
+  "dependencies": {
+    "Grpc.Core": "0.14.0-anexperiment",
+    "Google.Protobuf": "3.0.0-beta2"
+  },
+  "frameworks": {
+    "net45": { },
+    "dotnet54": {
+      "imports": [
+        "portable-net45"
+      ],
+      "dependencies": {
+        "Microsoft.CSharp": "4.0.1-beta-23516"
+      }
+    }
+  }
+}
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.xproj b/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.xproj
new file mode 100644
index 00000000000..82e044ec212
--- /dev/null
+++ b/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.xproj
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0.25123" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0.25123</VisualStudioVersion>
+    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.Props" Condition="'$(VSToolsPath)' != ''" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>48ea5bbe-70e2-4198-869d-d7e59c45f30d</ProjectGuid>
+    <RootNamespace>Grpc.IntegrationTesting.Client</RootNamespace>
+    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <SchemaVersion>2.0</SchemaVersion>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.targets" Condition="'$(VSToolsPath)' != ''" />
+</Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/project.json b/src/csharp/Grpc.IntegrationTesting.Client/project.json
new file mode 100644
index 00000000000..e023a9815b1
--- /dev/null
+++ b/src/csharp/Grpc.IntegrationTesting.Client/project.json
@@ -0,0 +1,15 @@
+{
+  "compile": "**/*.cs",
+  "compilationOptions": {
+    "emitEntryPoint": true
+  },
+
+  "content": "../nativelibs/**",
+
+  "dependencies": {
+    "Grpc.IntegrationTesting": "1.0.0"
+  },
+  "frameworks": {
+    "net45": { }
+  }
+}
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.xproj b/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.xproj
new file mode 100644
index 00000000000..7348004c982
--- /dev/null
+++ b/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.xproj
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0.25123" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0.25123</VisualStudioVersion>
+    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.Props" Condition="'$(VSToolsPath)' != ''" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>661b70d7-f56a-46e0-9b81-6227b591b5e7</ProjectGuid>
+    <RootNamespace>Grpc.IntegrationTesting.QpsWorker</RootNamespace>
+    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <SchemaVersion>2.0</SchemaVersion>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.targets" Condition="'$(VSToolsPath)' != ''" />
+</Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
new file mode 100644
index 00000000000..e023a9815b1
--- /dev/null
+++ b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
@@ -0,0 +1,15 @@
+{
+  "compile": "**/*.cs",
+  "compilationOptions": {
+    "emitEntryPoint": true
+  },
+
+  "content": "../nativelibs/**",
+
+  "dependencies": {
+    "Grpc.IntegrationTesting": "1.0.0"
+  },
+  "frameworks": {
+    "net45": { }
+  }
+}
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.xproj b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.xproj
new file mode 100644
index 00000000000..fc43c41fd89
--- /dev/null
+++ b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.xproj
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0.25123" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0.25123</VisualStudioVersion>
+    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.Props" Condition="'$(VSToolsPath)' != ''" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>881f7ad1-a84e-47a2-9402-115c63c4031e</ProjectGuid>
+    <RootNamespace>Grpc.IntegrationTesting.Server</RootNamespace>
+    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <SchemaVersion>2.0</SchemaVersion>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.targets" Condition="'$(VSToolsPath)' != ''" />
+</Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/project.json b/src/csharp/Grpc.IntegrationTesting.Server/project.json
new file mode 100644
index 00000000000..e023a9815b1
--- /dev/null
+++ b/src/csharp/Grpc.IntegrationTesting.Server/project.json
@@ -0,0 +1,15 @@
+{
+  "compile": "**/*.cs",
+  "compilationOptions": {
+    "emitEntryPoint": true
+  },
+
+  "content": "../nativelibs/**",
+
+  "dependencies": {
+    "Grpc.IntegrationTesting": "1.0.0"
+  },
+  "frameworks": {
+    "net45": { }
+  }
+}
diff --git a/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.xproj b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.xproj
new file mode 100644
index 00000000000..69e89fa5770
--- /dev/null
+++ b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.xproj
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0.25123" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0.25123</VisualStudioVersion>
+    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.Props" Condition="'$(VSToolsPath)' != ''" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>20354386-3e71-4046-a269-3bc2a06f3ec8</ProjectGuid>
+    <RootNamespace>Grpc.IntegrationTesting</RootNamespace>
+    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <SchemaVersion>2.0</SchemaVersion>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.targets" Condition="'$(VSToolsPath)' != ''" />
+</Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting/project.json b/src/csharp/Grpc.IntegrationTesting/project.json
new file mode 100644
index 00000000000..f2cda96e7be
--- /dev/null
+++ b/src/csharp/Grpc.IntegrationTesting/project.json
@@ -0,0 +1,21 @@
+{
+  "compile": "**/*.cs",
+  "compilationOptions": {
+    "emitEntryPoint": true
+  },
+
+  "content": "../nativelibs/**",
+
+  "dependencies": {
+    "Grpc.Auth": "0.0.1",
+    "Grpc.Core": "0.0.1",
+    "Google.Protobuf": "3.0.0-beta2",
+    "CommandLineParser": "1.9.71",
+    "Moq": "4.2.1510.2205",
+    "NUnit": "3.2.0",
+    "NUnitLite": "3.2.0-*"
+  },
+  "frameworks": {
+    "net45": { }
+  }
+}
diff --git a/src/csharp/build_packages.bat b/src/csharp/build_packages.bat
index 1cc63da9703..63f8c30bc7e 100644
--- a/src/csharp/build_packages.bat
+++ b/src/csharp/build_packages.bat
@@ -41,12 +41,12 @@ set NUGET=C:\nuget\nuget.exe
 
 @rem Collect the artifacts built by the previous build step if running on Jenkins
 @rem TODO(jtattermusch): is there a better way to do this?
-xcopy /Y /I ..\..\architecture=x86,language=csharp,platform=windows\artifacts\* Grpc.Core\windows_x86\
-xcopy /Y /I ..\..\architecture=x64,language=csharp,platform=windows\artifacts\* Grpc.Core\windows_x64\
-xcopy /Y /I ..\..\architecture=x86,language=csharp,platform=linux\artifacts\* Grpc.Core\linux_x86\
-xcopy /Y /I ..\..\architecture=x64,language=csharp,platform=linux\artifacts\* Grpc.Core\linux_x64\
-xcopy /Y /I ..\..\architecture=x86,language=csharp,platform=macos\artifacts\* Grpc.Core\macosx_x86\
-xcopy /Y /I ..\..\architecture=x64,language=csharp,platform=macos\artifacts\* Grpc.Core\macosx_x64\
+xcopy /Y /I ..\..\architecture=x86,language=csharp,platform=windows\artifacts\* nativelibs\windows_x86\
+xcopy /Y /I ..\..\architecture=x64,language=csharp,platform=windows\artifacts\* nativelibs\windows_x64\
+xcopy /Y /I ..\..\architecture=x86,language=csharp,platform=linux\artifacts\* nativelibs\linux_x86\
+xcopy /Y /I ..\..\architecture=x64,language=csharp,platform=linux\artifacts\* nativelibs\linux_x64\
+xcopy /Y /I ..\..\architecture=x86,language=csharp,platform=macos\artifacts\* nativelibs\macosx_x86\
+xcopy /Y /I ..\..\architecture=x64,language=csharp,platform=macos\artifacts\* nativelibs\macosx_x64\
 
 @rem Collect protoc artifacts built by the previous build step
 xcopy /Y /I ..\..\architecture=x86,language=protoc,platform=windows\artifacts\* protoc_plugins\windows_x86\
diff --git a/src/csharp/grpc.native.csharp/grpc.native.csharp.nuspec b/src/csharp/grpc.native.csharp/grpc.native.csharp.nuspec
deleted file mode 100644
index cc688e2bc71..00000000000
--- a/src/csharp/grpc.native.csharp/grpc.native.csharp.nuspec
+++ /dev/null
@@ -1,27 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<package>
-  <metadata>
-    <id>grpc.native.csharp</id>
-    <version>$version$</version>
-    <authors>Google Inc.</authors>
-    <owners>grpc-packages</owners>
-    <licenseUrl>https://github.com/grpc/grpc/blob/master/LICENSE</licenseUrl>
-    <projectUrl>http://github.com/grpc/grpc</projectUrl>
-    <requireLicenseAcceptance>false</requireLicenseAcceptance>
-    <description>Native extension needed by gRPC C# library. This is not the package you are looking for, it is only meant to be used as a dependency.</description>
-    <releaseNotes>Release of gRPC C core $version$ libraries.</releaseNotes>
-    <copyright>Copyright 2015</copyright>
-    <title>gRPC C# Native Extension</title>
-    <summary>Native library required by gRPC C#</summary>
-    <tags>gRPC native</tags>
-  </metadata>
-  <files>
-    <file src="grpc.native.csharp.targets" target="\build\portable-net45+netcore45+wpa81+wp8\grpc.native.csharp.targets" />
-    <file src="windows_x86/grpc_csharp_ext.dll" target="/build/native/bin/windows_x86/grpc_csharp_ext.dll" />
-    <file src="windows_x64/grpc_csharp_ext.dll" target="/build/native/bin/windows_x64/grpc_csharp_ext.dll" />
-    <file src="linux_x86/libgrpc_csharp_ext.so" target="/build/native/bin/linux_x86/libgrpc_csharp_ext.so" />
-    <file src="linux_x64/libgrpc_csharp_ext.so" target="/build/native/bin/linux_x64/libgrpc_csharp_ext.so" />
-    <file src="macosx_x86/libgrpc_csharp_ext.dylib" target="/build/native/bin/macosx_x86/libgrpc_csharp_ext.dylib" />
-    <file src="macosx_x64/libgrpc_csharp_ext.dylib" target="/build/native/bin/macosx_x64/libgrpc_csharp_ext.dylib" />
-  </files>
-</package>
diff --git a/templates/src/csharp/build_packages.bat.template b/templates/src/csharp/build_packages.bat.template
index 122435af2e8..ea2acb661ee 100644
--- a/templates/src/csharp/build_packages.bat.template
+++ b/templates/src/csharp/build_packages.bat.template
@@ -43,12 +43,12 @@
   
   @rem Collect the artifacts built by the previous build step if running on Jenkins
   @rem TODO(jtattermusch): is there a better way to do this?
-  xcopy /Y /I ..\..\architecture=x86,language=csharp,platform=windows\artifacts\* Grpc.Core\windows_x86${"\\"}
-  xcopy /Y /I ..\..\architecture=x64,language=csharp,platform=windows\artifacts\* Grpc.Core\windows_x64${"\\"}
-  xcopy /Y /I ..\..\architecture=x86,language=csharp,platform=linux\artifacts\* Grpc.Core\linux_x86${"\\"}
-  xcopy /Y /I ..\..\architecture=x64,language=csharp,platform=linux\artifacts\* Grpc.Core\linux_x64${"\\"}
-  xcopy /Y /I ..\..\architecture=x86,language=csharp,platform=macos\artifacts\* Grpc.Core\macosx_x86${"\\"}
-  xcopy /Y /I ..\..\architecture=x64,language=csharp,platform=macos\artifacts\* Grpc.Core\macosx_x64${"\\"}
+  xcopy /Y /I ..\..\architecture=x86,language=csharp,platform=windows\artifacts\* nativelibs\windows_x86${"\\"}
+  xcopy /Y /I ..\..\architecture=x64,language=csharp,platform=windows\artifacts\* nativelibs\windows_x64${"\\"}
+  xcopy /Y /I ..\..\architecture=x86,language=csharp,platform=linux\artifacts\* nativelibs\linux_x86${"\\"}
+  xcopy /Y /I ..\..\architecture=x64,language=csharp,platform=linux\artifacts\* nativelibs\linux_x64${"\\"}
+  xcopy /Y /I ..\..\architecture=x86,language=csharp,platform=macos\artifacts\* nativelibs\macosx_x86${"\\"}
+  xcopy /Y /I ..\..\architecture=x64,language=csharp,platform=macos\artifacts\* nativelibs\macosx_x64${"\\"}
   
   @rem Collect protoc artifacts built by the previous build step
   xcopy /Y /I ..\..\architecture=x86,language=protoc,platform=windows\artifacts\* protoc_plugins\windows_x86${"\\"}

From 88651de8a713b068eaf499d36bf0b67c0cc9e8e3 Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@google.com>
Date: Tue, 14 Jun 2016 16:30:58 -0700
Subject: [PATCH 063/280] Fixes #2646

Pass NULL in the host parameter of grpc_channel_create_call
---
 src/objective-c/GRPCClient/private/GRPCChannel.m | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/src/objective-c/GRPCClient/private/GRPCChannel.m b/src/objective-c/GRPCClient/private/GRPCChannel.m
index d3192c983d1..6cd4cb0ca30 100644
--- a/src/objective-c/GRPCClient/private/GRPCChannel.m
+++ b/src/objective-c/GRPCClient/private/GRPCChannel.m
@@ -199,9 +199,7 @@ grpc_channel_args * buildChannelArgs(NSDictionary *dictionary) {
                                   NULL, GRPC_PROPAGATE_DEFAULTS,
                                   queue.unmanagedQueue,
                                   path.UTF8String,
-                                  // Get "host" from "host:port"
-                                  // TODO(jcanizales): Use NSURLs throughout, to clarify these.
-                                  [_host componentsSeparatedByString:@":"][0].UTF8String,
+                                  NULL,
                                   gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
 }
 

From 350c1517819c883f8a31b75f243e2a699d8b57a4 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Tue, 14 Jun 2016 17:08:27 -0700
Subject: [PATCH 064/280] pr comments

---
 doc/interop-test-descriptions.md      | 39 ++++++++++-----------------
 src/proto/grpc/testing/messages.proto | 25 ++++++++++++-----
 2 files changed, 32 insertions(+), 32 deletions(-)

diff --git a/doc/interop-test-descriptions.md b/doc/interop-test-descriptions.md
index 3dd7807dec0..480625c6ba7 100644
--- a/doc/interop-test-descriptions.md
+++ b/doc/interop-test-descriptions.md
@@ -89,11 +89,10 @@ Client asserts:
 
 ### client_compressed_unary
 
-This test verifies the client can compress unary messages. It sends an initial
-inconsistent request to verify whether the server supports the
-[CompressedRequest][] feature. If it does, it should catch the inconsistency and
-fail the call with an `INVALID_ARGUMENT` status. If the feature is supported, it
-proceeds with two unary calls, for compressed and uncompressed payloads.
+This test verifies the client can compress unary messages by sending two unary
+calls, for compressed and uncompressed payloads. It sends an initial probing
+request to verify whether the server supports the [CompressedRequest][] feature.
+If it doesn't, the call is expected to fail with an `INVALID_ARGUMENT` status.
 
 Server features:
 * [UnaryCall][]
@@ -140,14 +139,14 @@ Procedure:
       calls were successful.
     * Response payload body is 314159 bytes in size.
     * Clients are free to assert that the response payload body contents are
-      zero and comparing the entire response message against a golden response.
+      zeros and comparing the entire response message against a golden response.
 
 
 ### server_compressed_unary
 
 This test verifies the server can compress unary messages. It sends two unary
-requests, expecting the server response to be
-compressed or not according to the `response_compressed` boolean.
+requests, expecting the server's response to be compressed or not according to
+the `response_compressed` boolean.
 
 Whether compression was actually performed is determined by the compression bit
 in the response's message flags.
@@ -158,7 +157,7 @@ Server features:
 * [CompressedResponse][]
 
 Procedure:
- 1. Client calls UnaryCall with:
+ 1. Client calls UnaryCall with `SimpleRequest`s:
 
     ```
     {
@@ -257,7 +256,8 @@ compressed with `expect_compressed` true; the second one uncompressed with
 
 Procedure:
  1. Client calls StreamingInputCall
- 1. Client sends the following feature-probing *uncompressed* message
+ 1. Client sends the following feature-probing *uncompressed*
+ `StreamingInputCallRequest` message
 
     ```
     {
@@ -305,7 +305,7 @@ Server features:
 * [StreamingOutputCall][]
 
 Procedure:
- 1. Client calls StreamingOutputCall with:
+ 1. Client calls StreamingOutputCall with `StreamingOutputCallRequest`:
 
     ```
     {
@@ -341,27 +341,16 @@ Server features:
 
 
 Procedure:
- 1. Client calls StreamingOutputCall with:
-
-    ```
-    {
-      response_compressed: true
-      response_parameters:{
-        size: 31415
-      }
-      response_parameters:{
-        size: 58979
-      }
-    }
-    ```
+ 1. Client calls StreamingOutputCall with `StreamingOutputCallRequest`:
 
     ```
     {
-      response_compressed: false
       response_parameters:{
+        response_compressed: true
         size: 31415
       }
       response_parameters:{
+        response_compressed: false
         size: 58979
       }
     }
diff --git a/src/proto/grpc/testing/messages.proto b/src/proto/grpc/testing/messages.proto
index 782fd40989d..1812dc74029 100644
--- a/src/proto/grpc/testing/messages.proto
+++ b/src/proto/grpc/testing/messages.proto
@@ -32,6 +32,8 @@
 
 syntax = "proto3";
 
+import "google/protobuf/wrappers.proto";
+
 package grpc.testing;
 
 // DEPRECATED, don't use. To be removed shortly.
@@ -76,8 +78,11 @@ message SimpleRequest {
   // Whether SimpleResponse should include OAuth scope.
   bool fill_oauth_scope = 5;
 
-  // Whether to request the server to compress the response.
-  bool response_compressed = 6;
+  // Whether to request the server to compress the response. This field is
+  // "nullable" in order to interoperate seamlessly with clients not able to
+  // implement the full compression tests by introspecting the call to verify
+  // the response's compression status.
+  google.protobuf.BoolValue response_compressed = 6;
 
   // Whether server should return a given status
   EchoStatus response_status = 7;
@@ -102,8 +107,11 @@ message StreamingInputCallRequest {
   // Optional input payload sent along with the request.
   Payload payload = 1;
 
-  // Whether the server should expect this request to be compressed.
-  bool expect_compressed = 2;
+  // Whether the server should expect this request to be compressed. This field
+  // is "nullable" in order to interoperate seamlessly with servers not able to
+  // implement the full compression tests by introspecting the call to verify
+  // the request's compression status.
+  BoolValue expect_compressed = 2;
 
   // Not expecting any payload from the response.
 }
@@ -122,6 +130,12 @@ message ResponseParameters {
   // Desired interval between consecutive responses in the response stream in
   // microseconds.
   int32 interval_us = 2;
+
+  // Whether to request the server to compress the response. This field is
+  // "nullable" in order to interoperate seamlessly with clients not able to
+  // implement the full compression tests by introspecting the call to verify
+  // the response's compression status.
+  BoolValue compressed = 3;
 }
 
 // Server-streaming request.
@@ -139,9 +153,6 @@ message StreamingOutputCallRequest {
   // Optional input payload sent along with the request.
   Payload payload = 3;
 
-  // Whether to request the server to compress the response.
-  bool response_compressed = 6;
-
   // Whether server should return a given status
   EchoStatus response_status = 7;
 }

From 8d9dff511811bd8e0c92bd56fd682db14033424b Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Wed, 15 Jun 2016 09:35:39 -0700
Subject: [PATCH 065/280] prevent interfering of project.json files with
 .csproj files in VS2015

---
 src/csharp/Grpc.Auth/Grpc.Auth.csproj                     | 1 +
 src/csharp/Grpc.Auth/Grpc.Auth.project.json               | 8 ++++++++
 src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj         | 1 +
 src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.project.json   | 8 ++++++++
 src/csharp/Grpc.Core/Grpc.Core.csproj                     | 1 +
 src/csharp/Grpc.Core/Grpc.Core.project.json               | 8 ++++++++
 .../Grpc.Examples.MathClient.csproj                       | 3 +++
 .../Grpc.Examples.MathClient.project.json                 | 8 ++++++++
 .../Grpc.Examples.MathServer.csproj                       | 3 +++
 .../Grpc.Examples.MathServer.project.json                 | 8 ++++++++
 src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj | 1 +
 .../Grpc.Examples.Tests/Grpc.Examples.Tests.project.json  | 8 ++++++++
 src/csharp/Grpc.Examples/Grpc.Examples.csproj             | 1 +
 src/csharp/Grpc.Examples/Grpc.Examples.project.json       | 8 ++++++++
 .../Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj  | 1 +
 .../Grpc.HealthCheck.Tests.project.json                   | 8 ++++++++
 src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj       | 1 +
 src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.project.json | 8 ++++++++
 .../Grpc.IntegrationTesting.Client.csproj                 | 1 +
 .../Grpc.IntegrationTesting.Client.project.json           | 8 ++++++++
 .../Grpc.IntegrationTesting.QpsWorker.csproj              | 1 +
 .../Grpc.IntegrationTesting.QpsWorker.project.json        | 8 ++++++++
 .../Grpc.IntegrationTesting.Server.csproj                 | 1 +
 .../Grpc.IntegrationTesting.Server.project.json           | 8 ++++++++
 .../Grpc.IntegrationTesting.StressClient.csproj           | 5 ++++-
 .../Grpc.IntegrationTesting.StressClient.project.json     | 8 ++++++++
 .../Grpc.IntegrationTesting.csproj                        | 1 +
 .../Grpc.IntegrationTesting.project.json                  | 8 ++++++++
 28 files changed, 133 insertions(+), 1 deletion(-)
 create mode 100644 src/csharp/Grpc.Auth/Grpc.Auth.project.json
 create mode 100644 src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.project.json
 create mode 100644 src/csharp/Grpc.Core/Grpc.Core.project.json
 create mode 100644 src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.project.json
 create mode 100644 src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.project.json
 create mode 100644 src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.project.json
 create mode 100644 src/csharp/Grpc.Examples/Grpc.Examples.project.json
 create mode 100644 src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.project.json
 create mode 100644 src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.project.json
 create mode 100644 src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.project.json
 create mode 100644 src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.project.json
 create mode 100644 src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.project.json
 create mode 100644 src/csharp/Grpc.IntegrationTesting.StressClient/Grpc.IntegrationTesting.StressClient.project.json
 create mode 100644 src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.project.json

diff --git a/src/csharp/Grpc.Auth/Grpc.Auth.csproj b/src/csharp/Grpc.Auth/Grpc.Auth.csproj
index 3acea7d2f83..1fa14fc3dfb 100644
--- a/src/csharp/Grpc.Auth/Grpc.Auth.csproj
+++ b/src/csharp/Grpc.Auth/Grpc.Auth.csproj
@@ -81,6 +81,7 @@
   </ItemGroup>
   <ItemGroup>
     <None Include="Grpc.Auth.nuspec" />
+    <None Include="Grpc.Auth.project.json" />
     <None Include="packages.config" />
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Auth/Grpc.Auth.project.json b/src/csharp/Grpc.Auth/Grpc.Auth.project.json
new file mode 100644
index 00000000000..c2f5bcb1637
--- /dev/null
+++ b/src/csharp/Grpc.Auth/Grpc.Auth.project.json
@@ -0,0 +1,8 @@
+{
+  "frameworks": {
+    "net45": { }
+  },
+  "runtimes": {
+    "win": { }
+  }
+}
diff --git a/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj b/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj
index 074c9603dcf..f6c226567d9 100644
--- a/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj
+++ b/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj
@@ -99,6 +99,7 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
+    <None Include="Grpc.Core.Tests.project.json" />
     <None Include="packages.config">
       <SubType>Designer</SubType>
     </None>
diff --git a/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.project.json b/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.project.json
new file mode 100644
index 00000000000..c2f5bcb1637
--- /dev/null
+++ b/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.project.json
@@ -0,0 +1,8 @@
+{
+  "frameworks": {
+    "net45": { }
+  },
+  "runtimes": {
+    "win": { }
+  }
+}
diff --git a/src/csharp/Grpc.Core/Grpc.Core.csproj b/src/csharp/Grpc.Core/Grpc.Core.csproj
index e460f004473..1952ee37121 100644
--- a/src/csharp/Grpc.Core/Grpc.Core.csproj
+++ b/src/csharp/Grpc.Core/Grpc.Core.csproj
@@ -141,6 +141,7 @@
   </ItemGroup>
   <ItemGroup>
     <None Include="Grpc.Core.nuspec" />
+    <None Include="Grpc.Core.project.json" />
     <None Include="packages.config" />
   </ItemGroup>
   <Import Project="NativeDeps.targets" />
diff --git a/src/csharp/Grpc.Core/Grpc.Core.project.json b/src/csharp/Grpc.Core/Grpc.Core.project.json
new file mode 100644
index 00000000000..c2f5bcb1637
--- /dev/null
+++ b/src/csharp/Grpc.Core/Grpc.Core.project.json
@@ -0,0 +1,8 @@
+{
+  "frameworks": {
+    "net45": { }
+  },
+  "runtimes": {
+    "win": { }
+  }
+}
diff --git a/src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.csproj b/src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.csproj
index 35c0646a3fd..65bf236def6 100644
--- a/src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.csproj
+++ b/src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.csproj
@@ -57,4 +57,7 @@
       <Name>Grpc.Examples</Name>
     </ProjectReference>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="Grpc.Examples.MathClient.project.json" />
+  </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.project.json b/src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.project.json
new file mode 100644
index 00000000000..c2f5bcb1637
--- /dev/null
+++ b/src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.project.json
@@ -0,0 +1,8 @@
+{
+  "frameworks": {
+    "net45": { }
+  },
+  "runtimes": {
+    "win": { }
+  }
+}
diff --git a/src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.csproj b/src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.csproj
index 74d79b44d98..26b42b6936d 100644
--- a/src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.csproj
+++ b/src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.csproj
@@ -57,4 +57,7 @@
       <Name>Grpc.Examples</Name>
     </ProjectReference>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="Grpc.Examples.MathServer.project.json" />
+  </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.project.json b/src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.project.json
new file mode 100644
index 00000000000..c2f5bcb1637
--- /dev/null
+++ b/src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.project.json
@@ -0,0 +1,8 @@
+{
+  "frameworks": {
+    "net45": { }
+  },
+  "runtimes": {
+    "win": { }
+  }
+}
diff --git a/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj b/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj
index 3fd28c65282..4c7d89309af 100644
--- a/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj
+++ b/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.csproj
@@ -69,6 +69,7 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
+    <None Include="Grpc.Examples.Tests.project.json" />
     <None Include="packages.config" />
   </ItemGroup>
   <ItemGroup>
diff --git a/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.project.json b/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.project.json
new file mode 100644
index 00000000000..c2f5bcb1637
--- /dev/null
+++ b/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.project.json
@@ -0,0 +1,8 @@
+{
+  "frameworks": {
+    "net45": { }
+  },
+  "runtimes": {
+    "win": { }
+  }
+}
diff --git a/src/csharp/Grpc.Examples/Grpc.Examples.csproj b/src/csharp/Grpc.Examples/Grpc.Examples.csproj
index 30170ab03c7..3dfa84e896e 100644
--- a/src/csharp/Grpc.Examples/Grpc.Examples.csproj
+++ b/src/csharp/Grpc.Examples/Grpc.Examples.csproj
@@ -69,6 +69,7 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
+    <None Include="Grpc.Examples.project.json" />
     <None Include="packages.config" />
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Examples/Grpc.Examples.project.json b/src/csharp/Grpc.Examples/Grpc.Examples.project.json
new file mode 100644
index 00000000000..c2f5bcb1637
--- /dev/null
+++ b/src/csharp/Grpc.Examples/Grpc.Examples.project.json
@@ -0,0 +1,8 @@
+{
+  "frameworks": {
+    "net45": { }
+  },
+  "runtimes": {
+    "win": { }
+  }
+}
diff --git a/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj b/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj
index a5ee4fdb46c..aefacfbcc01 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj
+++ b/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.csproj
@@ -74,6 +74,7 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
+    <None Include="Grpc.HealthCheck.Tests.project.json" />
     <None Include="packages.config" />
   </ItemGroup>
   <ItemGroup>
diff --git a/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.project.json b/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.project.json
new file mode 100644
index 00000000000..c2f5bcb1637
--- /dev/null
+++ b/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.project.json
@@ -0,0 +1,8 @@
+{
+  "frameworks": {
+    "net45": { }
+  },
+  "runtimes": {
+    "win": { }
+  }
+}
diff --git a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj
index 2697b74f59e..7db8b2d38e2 100644
--- a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj
+++ b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.csproj
@@ -65,6 +65,7 @@
   </ItemGroup>
   <ItemGroup>
     <None Include="Grpc.HealthCheck.nuspec" />
+    <None Include="Grpc.HealthCheck.project.json" />
     <None Include="packages.config" />
   </ItemGroup>
   <ItemGroup>
diff --git a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.project.json b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.project.json
new file mode 100644
index 00000000000..c2f5bcb1637
--- /dev/null
+++ b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.project.json
@@ -0,0 +1,8 @@
+{
+  "frameworks": {
+    "net45": { }
+  },
+  "runtimes": {
+    "win": { }
+  }
+}
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj b/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
index 339a754c02c..91fb3ce5bcf 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
@@ -83,6 +83,7 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
+    <None Include="Grpc.IntegrationTesting.Client.project.json" />
     <None Include="packages.config" />
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.project.json b/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.project.json
new file mode 100644
index 00000000000..c2f5bcb1637
--- /dev/null
+++ b/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.project.json
@@ -0,0 +1,8 @@
+{
+  "frameworks": {
+    "net45": { }
+  },
+  "runtimes": {
+    "win": { }
+  }
+}
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.csproj b/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.csproj
index 0dc2751b045..dda26a68923 100644
--- a/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.csproj
@@ -59,5 +59,6 @@
   </ItemGroup>
   <ItemGroup>
     <None Include="app.config" />
+    <None Include="Grpc.IntegrationTesting.QpsWorker.project.json" />
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.project.json b/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.project.json
new file mode 100644
index 00000000000..c2f5bcb1637
--- /dev/null
+++ b/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.project.json
@@ -0,0 +1,8 @@
+{
+  "frameworks": {
+    "net45": { }
+  },
+  "runtimes": {
+    "win": { }
+  }
+}
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
index 27a56503086..f73d99dbd1a 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
@@ -83,6 +83,7 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
+    <None Include="Grpc.IntegrationTesting.Server.project.json" />
     <None Include="packages.config" />
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.project.json b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.project.json
new file mode 100644
index 00000000000..c2f5bcb1637
--- /dev/null
+++ b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.project.json
@@ -0,0 +1,8 @@
+{
+  "frameworks": {
+    "net45": { }
+  },
+  "runtimes": {
+    "win": { }
+  }
+}
diff --git a/src/csharp/Grpc.IntegrationTesting.StressClient/Grpc.IntegrationTesting.StressClient.csproj b/src/csharp/Grpc.IntegrationTesting.StressClient/Grpc.IntegrationTesting.StressClient.csproj
index d6eba74289e..8bd3d789138 100644
--- a/src/csharp/Grpc.IntegrationTesting.StressClient/Grpc.IntegrationTesting.StressClient.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.StressClient/Grpc.IntegrationTesting.StressClient.csproj
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
@@ -57,4 +57,7 @@
       <Name>Grpc.IntegrationTesting</Name>
     </ProjectReference>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="Grpc.IntegrationTesting.StressClient.project.json" />
+  </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.StressClient/Grpc.IntegrationTesting.StressClient.project.json b/src/csharp/Grpc.IntegrationTesting.StressClient/Grpc.IntegrationTesting.StressClient.project.json
new file mode 100644
index 00000000000..c2f5bcb1637
--- /dev/null
+++ b/src/csharp/Grpc.IntegrationTesting.StressClient/Grpc.IntegrationTesting.StressClient.project.json
@@ -0,0 +1,8 @@
+{
+  "frameworks": {
+    "net45": { }
+  },
+  "runtimes": {
+    "win": { }
+  }
+}
diff --git a/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
index 00890494088..3a0764230d6 100644
--- a/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
+++ b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
@@ -129,6 +129,7 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
+    <None Include="Grpc.IntegrationTesting.project.json" />
     <None Include="packages.config">
       <SubType>Designer</SubType>
     </None>
diff --git a/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.project.json b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.project.json
new file mode 100644
index 00000000000..c2f5bcb1637
--- /dev/null
+++ b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.project.json
@@ -0,0 +1,8 @@
+{
+  "frameworks": {
+    "net45": { }
+  },
+  "runtimes": {
+    "win": { }
+  }
+}

From c58b3bbbaf01f3492aedce5bc88cd11873a4b8a0 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Wed, 15 Jun 2016 09:47:31 -0700
Subject: [PATCH 066/280] rename Grpc.Dnx.sln

---
 src/csharp/{Grpc.Dnx.sln => Grpc.Dotnet.sln} | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 rename src/csharp/{Grpc.Dnx.sln => Grpc.Dotnet.sln} (100%)

diff --git a/src/csharp/Grpc.Dnx.sln b/src/csharp/Grpc.Dotnet.sln
similarity index 100%
rename from src/csharp/Grpc.Dnx.sln
rename to src/csharp/Grpc.Dotnet.sln

From 5ff32fa9fde85d664b60b0a9ff4d0799e2e0a2b3 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Wed, 15 Jun 2016 09:49:40 -0700
Subject: [PATCH 067/280] update .xproj files

---
 src/csharp/Grpc.Auth/Grpc.Auth.xproj                           | 3 +--
 src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.xproj               | 3 +--
 src/csharp/Grpc.Core/Grpc.Core.xproj                           | 3 +--
 .../Grpc.Examples.MathClient/Grpc.Examples.MathClient.xproj    | 3 +--
 .../Grpc.Examples.MathServer/Grpc.Examples.MathServer.xproj    | 3 +--
 src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.xproj       | 3 +--
 src/csharp/Grpc.Examples/Grpc.Examples.xproj                   | 3 +--
 src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.xproj | 3 +--
 src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.xproj             | 3 +--
 .../Grpc.IntegrationTesting.Client.xproj                       | 3 +--
 .../Grpc.IntegrationTesting.QpsWorker.xproj                    | 3 +--
 .../Grpc.IntegrationTesting.Server.xproj                       | 3 +--
 .../Grpc.IntegrationTesting/Grpc.IntegrationTesting.xproj      | 3 +--
 13 files changed, 13 insertions(+), 26 deletions(-)

diff --git a/src/csharp/Grpc.Auth/Grpc.Auth.xproj b/src/csharp/Grpc.Auth/Grpc.Auth.xproj
index c3a6fa2947b..dd3d94c574a 100644
--- a/src/csharp/Grpc.Auth/Grpc.Auth.xproj
+++ b/src/csharp/Grpc.Auth/Grpc.Auth.xproj
@@ -9,9 +9,8 @@
     <ProjectGuid>c82631ed-06d1-4458-87bc-8257d12307a8</ProjectGuid>
     <RootNamespace>Grpc.Auth</RootNamespace>
     <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\Grpc.Core\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
-    <OutputPath Condition="'$(OutputPath)'=='' ">..\Grpc.Core\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">.\bin\</OutputPath>
   </PropertyGroup>
-
   <PropertyGroup>
     <SchemaVersion>2.0</SchemaVersion>
   </PropertyGroup>
diff --git a/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.xproj b/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.xproj
index e6595118fb1..05823291542 100644
--- a/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.xproj
+++ b/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.xproj
@@ -9,9 +9,8 @@
     <ProjectGuid>759e23b2-fc04-4695-902d-b073cded3599</ProjectGuid>
     <RootNamespace>Grpc.Core.Tests</RootNamespace>
     <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
-    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">.\bin\</OutputPath>
   </PropertyGroup>
-
   <PropertyGroup>
     <SchemaVersion>2.0</SchemaVersion>
   </PropertyGroup>
diff --git a/src/csharp/Grpc.Core/Grpc.Core.xproj b/src/csharp/Grpc.Core/Grpc.Core.xproj
index f5d1bf2eef5..137236ffdb6 100644
--- a/src/csharp/Grpc.Core/Grpc.Core.xproj
+++ b/src/csharp/Grpc.Core/Grpc.Core.xproj
@@ -9,9 +9,8 @@
     <ProjectGuid>dc9908b6-f291-4fc8-a46d-2ea2551790ec</ProjectGuid>
     <RootNamespace>Grpc.Core</RootNamespace>
     <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
-    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">.\bin\</OutputPath>
   </PropertyGroup>
-
   <PropertyGroup>
     <SchemaVersion>2.0</SchemaVersion>
   </PropertyGroup>
diff --git a/src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.xproj b/src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.xproj
index a8dc195a6dc..4655bd43774 100644
--- a/src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.xproj
+++ b/src/csharp/Grpc.Examples.MathClient/Grpc.Examples.MathClient.xproj
@@ -9,9 +9,8 @@
     <ProjectGuid>fd48deca-1622-4173-b1d9-2101cf5e7c5f</ProjectGuid>
     <RootNamespace>Grpc.Examples.MathClient</RootNamespace>
     <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
-    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">.\bin\</OutputPath>
   </PropertyGroup>
-
   <PropertyGroup>
     <SchemaVersion>2.0</SchemaVersion>
   </PropertyGroup>
diff --git a/src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.xproj b/src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.xproj
index 40746f1f946..38a449e8f29 100644
--- a/src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.xproj
+++ b/src/csharp/Grpc.Examples.MathServer/Grpc.Examples.MathServer.xproj
@@ -9,9 +9,8 @@
     <ProjectGuid>58579368-5372-4e67-acd6-9b59cb9fa698</ProjectGuid>
     <RootNamespace>Grpc.Examples.MathServer</RootNamespace>
     <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
-    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">.\bin\</OutputPath>
   </PropertyGroup>
-
   <PropertyGroup>
     <SchemaVersion>2.0</SchemaVersion>
   </PropertyGroup>
diff --git a/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.xproj b/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.xproj
index c744816a811..9cecd18b2e4 100644
--- a/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.xproj
+++ b/src/csharp/Grpc.Examples.Tests/Grpc.Examples.Tests.xproj
@@ -9,9 +9,8 @@
     <ProjectGuid>c61714a6-f633-44fb-97f4-c91f425c1d15</ProjectGuid>
     <RootNamespace>Grpc.Examples.Tests</RootNamespace>
     <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
-    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">.\bin\</OutputPath>
   </PropertyGroup>
-
   <PropertyGroup>
     <SchemaVersion>2.0</SchemaVersion>
   </PropertyGroup>
diff --git a/src/csharp/Grpc.Examples/Grpc.Examples.xproj b/src/csharp/Grpc.Examples/Grpc.Examples.xproj
index aa3ad680fd8..d1d7e6d9816 100644
--- a/src/csharp/Grpc.Examples/Grpc.Examples.xproj
+++ b/src/csharp/Grpc.Examples/Grpc.Examples.xproj
@@ -9,9 +9,8 @@
     <ProjectGuid>c77b792d-fc78-4ce2-9522-b40b0803c636</ProjectGuid>
     <RootNamespace>Grpc.Examples</RootNamespace>
     <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
-    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">.\bin\</OutputPath>
   </PropertyGroup>
-
   <PropertyGroup>
     <SchemaVersion>2.0</SchemaVersion>
   </PropertyGroup>
diff --git a/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.xproj b/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.xproj
index db05ccf7a4f..724c5b2a160 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.xproj
+++ b/src/csharp/Grpc.HealthCheck.Tests/Grpc.HealthCheck.Tests.xproj
@@ -9,9 +9,8 @@
     <ProjectGuid>43dafac6-5343-4621-960e-a8a977ea3f0b</ProjectGuid>
     <RootNamespace>Grpc.HealthCheck.Tests</RootNamespace>
     <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
-    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">.\bin\</OutputPath>
   </PropertyGroup>
-
   <PropertyGroup>
     <SchemaVersion>2.0</SchemaVersion>
   </PropertyGroup>
diff --git a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.xproj b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.xproj
index 18701779d19..5806a7af979 100644
--- a/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.xproj
+++ b/src/csharp/Grpc.HealthCheck/Grpc.HealthCheck.xproj
@@ -9,9 +9,8 @@
     <ProjectGuid>3be4ad0b-2bf0-4d68-b625-f6018ef0dcfa</ProjectGuid>
     <RootNamespace>Grpc.HealthCheck</RootNamespace>
     <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
-    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">.\bin\</OutputPath>
   </PropertyGroup>
-
   <PropertyGroup>
     <SchemaVersion>2.0</SchemaVersion>
   </PropertyGroup>
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.xproj b/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.xproj
index 82e044ec212..7f456cfaef1 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.xproj
+++ b/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.xproj
@@ -9,9 +9,8 @@
     <ProjectGuid>48ea5bbe-70e2-4198-869d-d7e59c45f30d</ProjectGuid>
     <RootNamespace>Grpc.IntegrationTesting.Client</RootNamespace>
     <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
-    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">.\bin\</OutputPath>
   </PropertyGroup>
-
   <PropertyGroup>
     <SchemaVersion>2.0</SchemaVersion>
   </PropertyGroup>
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.xproj b/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.xproj
index 7348004c982..15bec443d6c 100644
--- a/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.xproj
+++ b/src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.xproj
@@ -9,9 +9,8 @@
     <ProjectGuid>661b70d7-f56a-46e0-9b81-6227b591b5e7</ProjectGuid>
     <RootNamespace>Grpc.IntegrationTesting.QpsWorker</RootNamespace>
     <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
-    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">.\bin\</OutputPath>
   </PropertyGroup>
-
   <PropertyGroup>
     <SchemaVersion>2.0</SchemaVersion>
   </PropertyGroup>
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.xproj b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.xproj
index fc43c41fd89..689eb0b8425 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.xproj
+++ b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.xproj
@@ -9,9 +9,8 @@
     <ProjectGuid>881f7ad1-a84e-47a2-9402-115c63c4031e</ProjectGuid>
     <RootNamespace>Grpc.IntegrationTesting.Server</RootNamespace>
     <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
-    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">.\bin\</OutputPath>
   </PropertyGroup>
-
   <PropertyGroup>
     <SchemaVersion>2.0</SchemaVersion>
   </PropertyGroup>
diff --git a/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.xproj b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.xproj
index 69e89fa5770..357300ecb9b 100644
--- a/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.xproj
+++ b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.xproj
@@ -9,9 +9,8 @@
     <ProjectGuid>20354386-3e71-4046-a269-3bc2a06f3ec8</ProjectGuid>
     <RootNamespace>Grpc.IntegrationTesting</RootNamespace>
     <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
-    <OutputPath Condition="'$(OutputPath)'=='' ">..\artifacts\bin\$(MSBuildProjectName)\</OutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">.\bin\</OutputPath>
   </PropertyGroup>
-
   <PropertyGroup>
     <SchemaVersion>2.0</SchemaVersion>
   </PropertyGroup>

From ae7b048de4c6b8691dcd89b1a4442aa08ce3392d Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Wed, 15 Jun 2016 09:52:57 -0700
Subject: [PATCH 068/280] upgrade protobuf to 3.0.0-beta3 in project.json files

---
 src/csharp/Grpc.Examples/project.json           | 2 +-
 src/csharp/Grpc.HealthCheck/project.json        | 2 +-
 src/csharp/Grpc.IntegrationTesting/project.json | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/csharp/Grpc.Examples/project.json b/src/csharp/Grpc.Examples/project.json
index c78de89cf89..f259459a717 100644
--- a/src/csharp/Grpc.Examples/project.json
+++ b/src/csharp/Grpc.Examples/project.json
@@ -5,7 +5,7 @@
 
   "dependencies": {
     "Grpc.Core": "0.0.1",
-    "Google.Protobuf": "3.0.0-beta2"
+    "Google.Protobuf": "3.0.0-beta3"
   },
   "frameworks": {
     "net45": { },
diff --git a/src/csharp/Grpc.HealthCheck/project.json b/src/csharp/Grpc.HealthCheck/project.json
index 0984d43deca..220224819f8 100644
--- a/src/csharp/Grpc.HealthCheck/project.json
+++ b/src/csharp/Grpc.HealthCheck/project.json
@@ -16,7 +16,7 @@
 
   "dependencies": {
     "Grpc.Core": "0.14.0-anexperiment",
-    "Google.Protobuf": "3.0.0-beta2"
+    "Google.Protobuf": "3.0.0-beta3"
   },
   "frameworks": {
     "net45": { },
diff --git a/src/csharp/Grpc.IntegrationTesting/project.json b/src/csharp/Grpc.IntegrationTesting/project.json
index f2cda96e7be..93cabf21bcf 100644
--- a/src/csharp/Grpc.IntegrationTesting/project.json
+++ b/src/csharp/Grpc.IntegrationTesting/project.json
@@ -9,7 +9,7 @@
   "dependencies": {
     "Grpc.Auth": "0.0.1",
     "Grpc.Core": "0.0.1",
-    "Google.Protobuf": "3.0.0-beta2",
+    "Google.Protobuf": "3.0.0-beta3",
     "CommandLineParser": "1.9.71",
     "Moq": "4.2.1510.2205",
     "NUnit": "3.2.0",

From cf4205dff54d8e3920f98dac28049770b5f8f044 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Wed, 15 Jun 2016 11:22:20 -0700
Subject: [PATCH 069/280] Compilation error

---
 src/core/lib/iomgr/ev_epoll_linux.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 006c2a8ee7f..1fb59474640 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -317,7 +317,7 @@ static void polling_island_remove_all_fds_locked(polling_island *pi,
     if (err < 0 && errno != ENOENT) {
       /* TODO: sreek - We need a better way to bubble up this error instead of
       * just logging a message */
-      gpr_log(GPR_ERROR, "epoll_ctl deleting fds[%d]: %d failed with error: %s",
+      gpr_log(GPR_ERROR, "epoll_ctl deleting fds[%zu]: %d failed with error: %s",
               i, pi->fds[i]->fd, strerror(errno));
     }
 

From c61c235fac8e2fbb1968852108f95029b67970d4 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Tue, 14 Jun 2016 18:20:38 -0700
Subject: [PATCH 070/280] moar pr comments

---
 doc/interop-test-descriptions.md      | 95 ++++++++++++++++-----------
 src/proto/grpc/testing/messages.proto |  6 +-
 2 files changed, 61 insertions(+), 40 deletions(-)

diff --git a/doc/interop-test-descriptions.md b/doc/interop-test-descriptions.md
index 480625c6ba7..a4f9abecfae 100644
--- a/doc/interop-test-descriptions.md
+++ b/doc/interop-test-descriptions.md
@@ -90,19 +90,21 @@ Client asserts:
 ### client_compressed_unary
 
 This test verifies the client can compress unary messages by sending two unary
-calls, for compressed and uncompressed payloads. It sends an initial probing
-request to verify whether the server supports the [CompressedRequest][] feature.
-If it doesn't, the call is expected to fail with an `INVALID_ARGUMENT` status.
+calls, for compressed and uncompressed payloads. It also sends an initial
+probing request to verify whether the server supports the [CompressedRequest][]
+feature by checking if the probing call fails with an `INVALID_ARGUMENT` status.
 
 Server features:
 * [UnaryCall][]
 * [CompressedRequest][]
 
 Procedure:
- 1. Client calls UnaryCall with the feature probe, an **uncompressed** message:
+ 1. Client calls UnaryCall with the feature probe, an *uncompressed* message:
     ```
     {
-      expect_compressed: false
+      expect_compressed:{
+        value: true
+      }
       response_size: 314159
       payload:{
         body: 271828 bytes of zeros
@@ -114,7 +116,9 @@ Procedure:
 
     ```
     {
-      expect_compressed: true
+      expect_compressed:{
+        value: true
+      }
       response_size: 314159
       payload:{
         body: 271828 bytes of zeros
@@ -126,7 +130,9 @@ Procedure:
 
     ```
     {
-      expect_compressed: false
+      expect_compressed:{
+        value: false
+      }
       response_size: 314159
       payload:{
         body: 271828 bytes of zeros
@@ -135,8 +141,8 @@ Procedure:
     ```
 
     Client asserts:
-    * First call was unsuccessful with `INVALID_ARGUMENT` status. Subsequent
-      calls were successful.
+    * First call failed with `INVALID_ARGUMENT` status.
+    * Subsequent calls were successful.
     * Response payload body is 314159 bytes in size.
     * Clients are free to assert that the response payload body contents are
       zeros and comparing the entire response message against a golden response.
@@ -149,7 +155,8 @@ requests, expecting the server's response to be compressed or not according to
 the `response_compressed` boolean.
 
 Whether compression was actually performed is determined by the compression bit
-in the response's message flags.
+in the response's message flags. *Note that some languages may not have access
+to the message flags*.
 
 
 Server features:
@@ -157,11 +164,13 @@ Server features:
 * [CompressedResponse][]
 
 Procedure:
- 1. Client calls UnaryCall with `SimpleRequest`s:
+ 1. Client calls UnaryCall with `SimpleRequest`:
 
     ```
     {
-      response_compressed: true
+      response_compressed:{
+        value: true
+      }
       response_size: 314159
       payload:{
         body: 271828 bytes of zeros
@@ -171,7 +180,9 @@ Procedure:
 
     ```
     {
-      response_compressed: false
+      response_compressed:{
+        value: false
+      }
       response_size: 314159
       payload:{
         body: 271828 bytes of zeros
@@ -184,7 +195,7 @@ Procedure:
       compressed message flag set.
     * when `response_compressed` is false, the response MUST NOT have
       the compressed message flag set.
-    * response payload body is 314159 bytes in size
+    * response payload body is 314159 bytes in size in both cases.
     * clients are free to assert that the response payload body contents are
       zero and comparing the entire response message against a golden response
 
@@ -247,21 +258,20 @@ Client asserts:
 
 ### client_compressed_streaming
 
-This test verifies the client can compress streaming messages. It sends an
-initial inconsistent streaming call comprised of a single message to verify if
-the server implements the [CompressedRequest][] feature. If it does, the client
-will then send another streaming call, comprised of two messages: the first one
-compressed with `expect_compressed` true; the second one uncompressed with
-`expected_compressed` false.
+This test verifies the client can compress requests on per-message basis by
+performing a two-request streaming call. It also sends an initial probing
+request to verify whether the server supports the [CompressedRequest][] feature
+by checking if the probing call fails with an `INVALID_ARGUMENT` status.
 
 Procedure:
- 1. Client calls StreamingInputCall
- 1. Client sends the following feature-probing *uncompressed*
- `StreamingInputCallRequest` message
+ 1. Client calls `StreamingInputCall` and sends the following feature-probing
+    *uncompressed* `StreamingInputCallRequest` message
 
     ```
     {
-      expect_compressed: true
+      expect_compressed:{
+        value: true
+      }
       payload:{
         body: 27182 bytes of zeros
       }
@@ -270,31 +280,37 @@ Procedure:
     If the call fails with `INVALID_ARGUMENT`, the test fails. Otherwise, we
     continue.
 
- 1. Client then sends the *compressed* message
+ 1. Client calls `StreamingInputCall` again, sending the *compressed* message
 
     ```
     {
-      expect_compressed: true
+      expect_compressed:{
+        value: true
+      }
       payload:{
         body: 27182 bytes of zeros
       }
     }
     ```
- 1. And finally, the *uncompressed* message:
+
+ 1. And finally, the *uncompressed* message
     ```
     {
-      expect_compressed: false
+      expect_compressed:{
+        value: false
+      }
       payload:{
         body: 45904 bytes of zeros
       }
     }
     ```
+
  1. Client half-closes
 
- Client asserts:
- * First call was unsuccessful with `INVALID_ARGUMENT` status. Subsequent
-   calls were successful.
- * Response aggregated_payload_size is 73086.
+Client asserts:
+* First call fails with `INVALID_ARGUMENT`.
+* Next calls succeeds.
+* Response aggregated payload size is 73086.
 
 
 ### server_streaming
@@ -333,7 +349,8 @@ Client asserts:
 
 ### server_compressed_streaming
 
-This test verifies that the server can compress streaming messages.
+This test verifies that the server can compress streaming messages and disable
+compression on individual messages.
 
 Server features:
 * [StreamingOutputCall][]
@@ -346,12 +363,16 @@ Procedure:
     ```
     {
       response_parameters:{
-        response_compressed: true
+        compressed: {
+          value: true
+        }
         size: 31415
       }
       response_parameters:{
-        response_compressed: false
-        size: 58979
+        compressed: {
+          value: false
+        }
+        size: 92653
       }
     }
     ```
@@ -363,7 +384,7 @@ Procedure:
       NOT have the compressed message flag set.
     * when `response_compressed` is true, the response's messages MUST
       have the compressed message flag set.
-    * response payload bodies are sized (in order): 31415, 58979
+    * response payload bodies are sized (in order): 31415, 92653
     * clients are free to assert that the response payload body contents are
       zero and comparing the entire response messages against golden responses
 
diff --git a/src/proto/grpc/testing/messages.proto b/src/proto/grpc/testing/messages.proto
index 1812dc74029..e4e748a6913 100644
--- a/src/proto/grpc/testing/messages.proto
+++ b/src/proto/grpc/testing/messages.proto
@@ -88,7 +88,7 @@ message SimpleRequest {
   EchoStatus response_status = 7;
 
   // Whether the server should expect this request to be compressed.
-  bool expect_compressed = 8;
+  google.protobuf.BoolValue expect_compressed = 8;
 }
 
 // Unary response, as configured by the request.
@@ -111,7 +111,7 @@ message StreamingInputCallRequest {
   // is "nullable" in order to interoperate seamlessly with servers not able to
   // implement the full compression tests by introspecting the call to verify
   // the request's compression status.
-  BoolValue expect_compressed = 2;
+  google.protobuf.BoolValue expect_compressed = 2;
 
   // Not expecting any payload from the response.
 }
@@ -135,7 +135,7 @@ message ResponseParameters {
   // "nullable" in order to interoperate seamlessly with clients not able to
   // implement the full compression tests by introspecting the call to verify
   // the response's compression status.
-  BoolValue compressed = 3;
+  google.protobuf.BoolValue compressed = 3;
 }
 
 // Server-streaming request.

From a6c9a9121ec68a6754f4020bed357498bb237b37 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Wed, 15 Jun 2016 10:11:43 -0700
Subject: [PATCH 071/280] update project.json

---
 src/csharp/Grpc.Auth/project.json             | 25 +++++------
 src/csharp/Grpc.Core.Tests/project.json       | 14 +++---
 src/csharp/Grpc.Core/project.json             | 44 +++++++++----------
 .../Grpc.Examples.MathClient/project.json     | 13 +++---
 .../Grpc.Examples.MathServer/project.json     | 13 +++---
 src/csharp/Grpc.Examples.Tests/project.json   | 13 +++---
 src/csharp/Grpc.Examples/project.json         | 13 ++++--
 .../Grpc.HealthCheck.Tests/project.json       | 15 ++++---
 src/csharp/Grpc.HealthCheck/project.json      | 30 ++++++++-----
 .../project.json                              | 13 +++---
 .../project.json                              | 13 +++---
 .../project.json                              | 13 +++---
 .../Grpc.IntegrationTesting/project.json      | 14 +++---
 13 files changed, 133 insertions(+), 100 deletions(-)

diff --git a/src/csharp/Grpc.Auth/project.json b/src/csharp/Grpc.Auth/project.json
index 513325f7491..25579982a9d 100644
--- a/src/csharp/Grpc.Auth/project.json
+++ b/src/csharp/Grpc.Auth/project.json
@@ -1,20 +1,17 @@
 {
   "version": "0.14.0-anexperiment",
-  
   "title": "gRPC C# Auth",
-  "summary": "Auth library for C# implementation of gRPC - an RPC library and framework",
-  "description": "Auth library for C# implementation of gRPC - an RPC library and framework. See project site for more info.",
-  "authors": ["Google Inc."],
-  "owners": ["grpc-packages"],
-  "licenseUrl": "https://github.com/grpc/grpc/blob/master/LICENSE",
-  "projectUrl": "https://github.com/grpc/grpc",
-  "requireLicenseAcceptance": false,
+  "authors": [ "Google Inc." ],
   "copyright": "Copyright 2015, Google Inc.",
-  "tags": ["gRPC RPC Protocol HTTP/2 Auth OAuth2"],
-  
-  "compile": "**/*.cs",
-  "resourceFiles": ["../../../etc/roots.pem"],
-
+  "packOptions": {
+    "summary": "Auth library for C# implementation of gRPC - an RPC library and framework",
+    "description": "Auth library for C# implementation of gRPC - an RPC library and framework. See project site for more info.",
+    "owners": [ "grpc-packages" ],
+    "licenseUrl": "https://github.com/grpc/grpc/blob/master/LICENSE",
+    "projectUrl": "https://github.com/grpc/grpc",
+    "requireLicenseAcceptance": false,
+    "tags": [ "gRPC RPC Protocol HTTP/2 Auth OAuth2" ],
+  },
   "dependencies": {
     "Grpc.Core": "0.14.0-anexperiment",
     "Google.Apis.Auth": "1.11.1"
@@ -28,7 +25,7 @@
       "dependencies": {
         "Microsoft.CSharp": "4.0.1-beta-23516",
         "Microsoft.NETCore.Portable.Compatibility": "1.0.1-beta-23516",
-        "System.Threading.Tasks":  "4.0.11-beta-23516"
+        "System.Threading.Tasks": "4.0.11-beta-23516"
       }
     }
   }
diff --git a/src/csharp/Grpc.Core.Tests/project.json b/src/csharp/Grpc.Core.Tests/project.json
index 0c5d9354358..dc90e04ccfb 100644
--- a/src/csharp/Grpc.Core.Tests/project.json
+++ b/src/csharp/Grpc.Core.Tests/project.json
@@ -1,13 +1,17 @@
 {
-  "compile": "**/*.cs",
-  "compilationOptions": {
+  "buildOptions": {
+    "compile": "**/*.cs",
+    "copyToOutput": {
+      "mappings": {
+        "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+        "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll"
+      }
+    },
     "emitEntryPoint": true
   },
-
-  "content": "../nativelibs/**",
-
   "dependencies": {
     "Grpc.Core": "0.14.0-anexperiment",
+    "Newtonsoft.Json": "8.0.3",
     "NUnit": "3.2.0",
     "NUnitLite": "3.2.0-*"
   },
diff --git a/src/csharp/Grpc.Core/project.json b/src/csharp/Grpc.Core/project.json
index 8aece57856c..a916bbd09ab 100644
--- a/src/csharp/Grpc.Core/project.json
+++ b/src/csharp/Grpc.Core/project.json
@@ -1,32 +1,30 @@
 {
   "version": "0.14.0-anexperiment",
-
   "title": "gRPC C# Core",
-  "summary": "Core C# implementation of gRPC - an RPC library and framework",
-  "description": "Core C# implementation of gRPC - an RPC library and framework. See project site for more info.",
   "authors": [ "Google Inc." ],
-  "owners": [ "grpc-packages" ],
-  "licenseUrl": "https://github.com/grpc/grpc/blob/master/LICENSE",
-  "projectUrl": "https://github.com/grpc/grpc",
-  "requireLicenseAcceptance": false,
   "copyright": "Copyright 2015, Google Inc.",
-  "tags": [ "gRPC RPC Protocol HTTP/2" ],
-
-  "compile": "**/*.cs",
-  "resourceFiles": [ "../../../etc/roots.pem" ],
-
-  "content": "../nativelibs/**",
-
-  "packInclude": {
-    "build/net45/": "Grpc.Core.targets",
-    "build/native/bin/windows_x86/": "../nativelibs/windows_x86/grpc_csharp_ext.dll",
-    "build/native/bin/windows_x64/": "../nativelibs/windows_x64/grpc_csharp_ext.dll",
-    "build/native/bin/linux_x86/": "../nativelibs/linux_x86/libgrpc_csharp_ext.so",
-    "build/native/bin/linux_x64/": "../nativelibs/linux_x64/libgrpc_csharp_ext.so",
-    "build/native/bin/macosx_x86/": "../nativelibs/macosx_x86/libgrpc_csharp_ext.dylib",
-    "build/native/bin/macosx_x64/": "../nativelibs/macosx_x64/libgrpc_csharp_ext.dylib"
+  "packOptions": {
+    "summary": "Core C# implementation of gRPC - an RPC library and framework",
+    "description": "Core C# implementation of gRPC - an RPC library and framework. See project site for more info.",
+    "owners": [ "grpc-packages" ],
+    "licenseUrl": "https://github.com/grpc/grpc/blob/master/LICENSE",
+    "projectUrl": "https://github.com/grpc/grpc",
+    "requireLicenseAcceptance": false,
+    "tags": [ "gRPC RPC Protocol HTTP/2" ],
+    "files": {
+      "build/net45/": "Grpc.Core.targets",
+      "build/native/bin/windows_x86/": "../nativelibs/windows_x86/grpc_csharp_ext.dll",
+      "build/native/bin/windows_x64/": "../nativelibs/windows_x64/grpc_csharp_ext.dll",
+      "build/native/bin/linux_x86/": "../nativelibs/linux_x86/libgrpc_csharp_ext.so",
+      "build/native/bin/linux_x64/": "../nativelibs/linux_x64/libgrpc_csharp_ext.so",
+      "build/native/bin/macosx_x86/": "../nativelibs/macosx_x86/libgrpc_csharp_ext.dylib",
+      "build/native/bin/macosx_x64/": "../nativelibs/macosx_x64/libgrpc_csharp_ext.dylib"
+    }
+  },
+  "buildOptions": {
+    "compile": "**/*.cs",
+    "embed": [ "../../../etc/roots.pem" ]
   },
-
   "dependencies": {
     "Ix-Async": "1.2.5"
   },
diff --git a/src/csharp/Grpc.Examples.MathClient/project.json b/src/csharp/Grpc.Examples.MathClient/project.json
index 67af09721ce..4abf8a5e34f 100644
--- a/src/csharp/Grpc.Examples.MathClient/project.json
+++ b/src/csharp/Grpc.Examples.MathClient/project.json
@@ -1,11 +1,14 @@
 {
-  "compile": "**/*.cs",
-  "compilationOptions": {
+  "buildOptions": {
+    "compile": "**/*.cs",
+    "copyToOutput": {
+      "mappings": {
+        "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+        "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll"
+      }
+    },
     "emitEntryPoint": true
   },
-
-  "content": "../nativelibs/**",
-
   "dependencies": {
     "Grpc.Examples": "1.0.0"
   },
diff --git a/src/csharp/Grpc.Examples.MathServer/project.json b/src/csharp/Grpc.Examples.MathServer/project.json
index 67af09721ce..4abf8a5e34f 100644
--- a/src/csharp/Grpc.Examples.MathServer/project.json
+++ b/src/csharp/Grpc.Examples.MathServer/project.json
@@ -1,11 +1,14 @@
 {
-  "compile": "**/*.cs",
-  "compilationOptions": {
+  "buildOptions": {
+    "compile": "**/*.cs",
+    "copyToOutput": {
+      "mappings": {
+        "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+        "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll"
+      }
+    },
     "emitEntryPoint": true
   },
-
-  "content": "../nativelibs/**",
-
   "dependencies": {
     "Grpc.Examples": "1.0.0"
   },
diff --git a/src/csharp/Grpc.Examples.Tests/project.json b/src/csharp/Grpc.Examples.Tests/project.json
index e61aa65abfc..bd74812c153 100644
--- a/src/csharp/Grpc.Examples.Tests/project.json
+++ b/src/csharp/Grpc.Examples.Tests/project.json
@@ -1,11 +1,14 @@
 {
-  "compile": "**/*.cs",
-  "compilationOptions": {
+  "buildOptions": {
+    "compile": "**/*.cs",
+    "copyToOutput": {
+      "mappings": {
+        "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+        "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll"
+      }
+    },
     "emitEntryPoint": true
   },
-
-  "content": "../nativelibs/**",
-
   "dependencies": {
     "Grpc.Examples": "1.0.0",
     "NUnit": "3.2.0",
diff --git a/src/csharp/Grpc.Examples/project.json b/src/csharp/Grpc.Examples/project.json
index f259459a717..e2b4c10422f 100644
--- a/src/csharp/Grpc.Examples/project.json
+++ b/src/csharp/Grpc.Examples/project.json
@@ -1,14 +1,19 @@
 {
-  "compile": "**/*.cs",
-
-  "content": "../nativelibs/**",
+  "buildOptions": {
+    "compile": "**/*.cs"
+  },
 
   "dependencies": {
     "Grpc.Core": "0.0.1",
     "Google.Protobuf": "3.0.0-beta3"
   },
   "frameworks": {
-    "net45": { },
+    "net45": {
+      "frameworkAssemblies": {
+        "System.Runtime": "",
+        "System.IO": ""
+      }
+    },
     "dotnet54": {
       "imports": [
         "portable-net45"
diff --git a/src/csharp/Grpc.HealthCheck.Tests/project.json b/src/csharp/Grpc.HealthCheck.Tests/project.json
index 5ecb17c9671..248a1324f60 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/project.json
+++ b/src/csharp/Grpc.HealthCheck.Tests/project.json
@@ -1,13 +1,16 @@
 {
-  "compile": "**/*.cs",
-  "compilationOptions": {
+  "buildOptions": {
+    "compile": "**/*.cs",
+    "copyToOutput": {
+      "mappings": {
+        "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+        "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll"
+      }
+    },
     "emitEntryPoint": true
   },
-
-  "content": "../nativelibs/**",
-
   "dependencies": {
-    "Grpc.HealthCheck": "1.0.0",
+    "Grpc.HealthCheck": "0.0.1",
     "NUnit": "3.2.0",
     "NUnitLite": "3.2.0-*"
   },
diff --git a/src/csharp/Grpc.HealthCheck/project.json b/src/csharp/Grpc.HealthCheck/project.json
index 220224819f8..ad42df595d4 100644
--- a/src/csharp/Grpc.HealthCheck/project.json
+++ b/src/csharp/Grpc.HealthCheck/project.json
@@ -1,25 +1,31 @@
 {
   "version": "0.14.0-anexperiment",
-
   "title": "gRPC C# Healthchecking",
-  "summary": "Implementation of gRPC health service",
-  "description": "Example implementation of grpc.health.v1 service that can be used for health-checking.",
   "authors": [ "Google Inc." ],
-  "owners": [ "grpc-packages" ],
-  "licenseUrl": "https://github.com/grpc/grpc/blob/master/LICENSE",
-  "projectUrl": "https://github.com/grpc/grpc",
-  "requireLicenseAcceptance": false,
   "copyright": "Copyright 2015, Google Inc.",
-  "tags": [ "gRPC health check" ],
-
-  "compile": "**/*.cs",
-
+  "packOptions": {
+    "summary": "Implementation of gRPC health service",
+    "description": "Example implementation of grpc.health.v1 service that can be used for health-checking.",
+    "owners": [ "grpc-packages" ],
+    "licenseUrl": "https://github.com/grpc/grpc/blob/master/LICENSE",
+    "projectUrl": "https://github.com/grpc/grpc",
+    "requireLicenseAcceptance": false,
+    "tags": [ "gRPC health check" ]
+  },
+  "buildOptions": {
+    "compile": "**/*.cs"
+  },
   "dependencies": {
     "Grpc.Core": "0.14.0-anexperiment",
     "Google.Protobuf": "3.0.0-beta3"
   },
   "frameworks": {
-    "net45": { },
+    "net45": {
+      "frameworkAssemblies": {
+        "System.Runtime": "",
+        "System.IO": ""
+      }
+    },
     "dotnet54": {
       "imports": [
         "portable-net45"
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/project.json b/src/csharp/Grpc.IntegrationTesting.Client/project.json
index e023a9815b1..6ad74d59984 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Client/project.json
@@ -1,11 +1,14 @@
 {
-  "compile": "**/*.cs",
-  "compilationOptions": {
+  "buildOptions": {
+    "compile": "**/*.cs",
+    "copyToOutput": {
+      "mappings": {
+        "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+        "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll"
+      }
+    },
     "emitEntryPoint": true
   },
-
-  "content": "../nativelibs/**",
-
   "dependencies": {
     "Grpc.IntegrationTesting": "1.0.0"
   },
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
index e023a9815b1..6ad74d59984 100644
--- a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
@@ -1,11 +1,14 @@
 {
-  "compile": "**/*.cs",
-  "compilationOptions": {
+  "buildOptions": {
+    "compile": "**/*.cs",
+    "copyToOutput": {
+      "mappings": {
+        "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+        "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll"
+      }
+    },
     "emitEntryPoint": true
   },
-
-  "content": "../nativelibs/**",
-
   "dependencies": {
     "Grpc.IntegrationTesting": "1.0.0"
   },
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/project.json b/src/csharp/Grpc.IntegrationTesting.Server/project.json
index e023a9815b1..6ad74d59984 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Server/project.json
@@ -1,11 +1,14 @@
 {
-  "compile": "**/*.cs",
-  "compilationOptions": {
+  "buildOptions": {
+    "compile": "**/*.cs",
+    "copyToOutput": {
+      "mappings": {
+        "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+        "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll"
+      }
+    },
     "emitEntryPoint": true
   },
-
-  "content": "../nativelibs/**",
-
   "dependencies": {
     "Grpc.IntegrationTesting": "1.0.0"
   },
diff --git a/src/csharp/Grpc.IntegrationTesting/project.json b/src/csharp/Grpc.IntegrationTesting/project.json
index 93cabf21bcf..0093531fa9e 100644
--- a/src/csharp/Grpc.IntegrationTesting/project.json
+++ b/src/csharp/Grpc.IntegrationTesting/project.json
@@ -1,11 +1,8 @@
 {
-  "compile": "**/*.cs",
-  "compilationOptions": {
+  "buildOptions": {
+    "compile": "**/*.cs",
     "emitEntryPoint": true
   },
-
-  "content": "../nativelibs/**",
-
   "dependencies": {
     "Grpc.Auth": "0.0.1",
     "Grpc.Core": "0.0.1",
@@ -16,6 +13,11 @@
     "NUnitLite": "3.2.0-*"
   },
   "frameworks": {
-    "net45": { }
+    "net45": {
+      "frameworkAssemblies": {
+        "System.Runtime": "",
+        "System.IO": ""
+      }
+    }
   }
 }

From 635fafc398df035d45e0f56fe24fb21477805067 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Wed, 15 Jun 2016 15:10:51 -0700
Subject: [PATCH 072/280] dont register shutdownhooks for dotnet5.4

---
 src/csharp/Grpc.Core.Tests/AppDomainUnloadTest.cs | 14 ++++++++------
 src/csharp/Grpc.Core/GrpcEnvironment.cs           |  4 ++++
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/src/csharp/Grpc.Core.Tests/AppDomainUnloadTest.cs b/src/csharp/Grpc.Core.Tests/AppDomainUnloadTest.cs
index e605a310f9e..d2c641cf2f8 100644
--- a/src/csharp/Grpc.Core.Tests/AppDomainUnloadTest.cs
+++ b/src/csharp/Grpc.Core.Tests/AppDomainUnloadTest.cs
@@ -32,13 +32,7 @@
 #endregion
 
 using System;
-using System.Diagnostics;
-using System.Linq;
-using System.Reflection;
-using System.Threading;
 using System.Threading.Tasks;
-using Grpc.Core;
-using Grpc.Core.Internal;
 using Grpc.Core.Utils;
 using NUnit.Framework;
 
@@ -46,6 +40,13 @@ namespace Grpc.Core.Tests
 {
     public class AppDomainUnloadTest
     {
+#if DOTNET5_4
+        [Test]
+        [Ignore("Not supported for CoreCLR")]
+        public void AppDomainUnloadHookCanCleanupAbandonedCall()
+        {
+        }
+#else
         [Test]
         public void AppDomainUnloadHookCanCleanupAbandonedCall()
         {
@@ -86,5 +87,6 @@ namespace Grpc.Core.Tests
                 readyToShutdown.Task.Wait();  // make sure handler is running
             }
         }
+#endif
     }
 }
diff --git a/src/csharp/Grpc.Core/GrpcEnvironment.cs b/src/csharp/Grpc.Core/GrpcEnvironment.cs
index e9e4cb4cbb3..37f9dce7c2f 100644
--- a/src/csharp/Grpc.Core/GrpcEnvironment.cs
+++ b/src/csharp/Grpc.Core/GrpcEnvironment.cs
@@ -352,8 +352,12 @@ namespace Grpc.Core
                 {
                     if (!hooksRegistered)
                     {
+                        // TODO(jtattermusch): register shutdownhooks for CoreCLR as well
+#if !DOTNET5_4
+
                         AppDomain.CurrentDomain.ProcessExit += ShutdownHookHandler;
                         AppDomain.CurrentDomain.DomainUnload += ShutdownHookHandler;
+#endif
                     }
                     hooksRegistered = true;
                 }

From 9f6a80597771eae74760b23a66737eb8960f8fd7 Mon Sep 17 00:00:00 2001
From: murgatroid99 <mlumish@google.com>
Date: Wed, 15 Jun 2016 17:39:03 -0700
Subject: [PATCH 073/280] Allow disabling traces, add trace variables for pluck
 and timeout events

---
 BUILD                                         |  4 --
 build.yaml                                    |  1 -
 gRPC.podspec                                  |  2 -
 grpc.gemspec                                  |  1 -
 package.xml                                   |  1 -
 src/core/lib/debug/trace.c                    |  8 +++-
 src/core/lib/surface/call.h                   |  1 -
 src/core/lib/surface/completion_queue.c       | 29 +++++++----
 src/core/lib/surface/completion_queue.h       |  3 ++
 src/core/lib/surface/init.c                   |  7 ++-
 src/core/lib/surface/surface_trace.h          | 48 -------------------
 tools/doxygen/Doxyfile.core.internal          |  1 -
 tools/run_tests/sources_and_headers.json      |  2 -
 vsprojects/vcxproj/grpc/grpc.vcxproj          |  1 -
 vsprojects/vcxproj/grpc/grpc.vcxproj.filters  |  3 --
 .../grpc_unsecure/grpc_unsecure.vcxproj       |  1 -
 .../grpc_unsecure.vcxproj.filters             |  3 --
 17 files changed, 36 insertions(+), 80 deletions(-)
 delete mode 100644 src/core/lib/surface/surface_trace.h

diff --git a/BUILD b/BUILD
index f049e3c4056..bf001ac7273 100644
--- a/BUILD
+++ b/BUILD
@@ -228,7 +228,6 @@ cc_library(
     "src/core/lib/surface/init.h",
     "src/core/lib/surface/lame_client.h",
     "src/core/lib/surface/server.h",
-    "src/core/lib/surface/surface_trace.h",
     "src/core/lib/transport/byte_stream.h",
     "src/core/lib/transport/connectivity_state.h",
     "src/core/lib/transport/metadata.h",
@@ -606,7 +605,6 @@ cc_library(
     "src/core/lib/surface/init.h",
     "src/core/lib/surface/lame_client.h",
     "src/core/lib/surface/server.h",
-    "src/core/lib/surface/surface_trace.h",
     "src/core/lib/transport/byte_stream.h",
     "src/core/lib/transport/connectivity_state.h",
     "src/core/lib/transport/metadata.h",
@@ -949,7 +947,6 @@ cc_library(
     "src/core/lib/surface/init.h",
     "src/core/lib/surface/lame_client.h",
     "src/core/lib/surface/server.h",
-    "src/core/lib/surface/surface_trace.h",
     "src/core/lib/transport/byte_stream.h",
     "src/core/lib/transport/connectivity_state.h",
     "src/core/lib/transport/metadata.h",
@@ -2061,7 +2058,6 @@ objc_library(
     "src/core/lib/surface/init.h",
     "src/core/lib/surface/lame_client.h",
     "src/core/lib/surface/server.h",
-    "src/core/lib/surface/surface_trace.h",
     "src/core/lib/transport/byte_stream.h",
     "src/core/lib/transport/connectivity_state.h",
     "src/core/lib/transport/metadata.h",
diff --git a/build.yaml b/build.yaml
index a83ebc595ad..11cc9347cb0 100644
--- a/build.yaml
+++ b/build.yaml
@@ -224,7 +224,6 @@ filegroups:
   - src/core/lib/surface/init.h
   - src/core/lib/surface/lame_client.h
   - src/core/lib/surface/server.h
-  - src/core/lib/surface/surface_trace.h
   - src/core/lib/transport/byte_stream.h
   - src/core/lib/transport/connectivity_state.h
   - src/core/lib/transport/metadata.h
diff --git a/gRPC.podspec b/gRPC.podspec
index d3665d51744..622be89ca74 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -231,7 +231,6 @@ Pod::Spec.new do |s|
                       'src/core/lib/surface/init.h',
                       'src/core/lib/surface/lame_client.h',
                       'src/core/lib/surface/server.h',
-                      'src/core/lib/surface/surface_trace.h',
                       'src/core/lib/transport/byte_stream.h',
                       'src/core/lib/transport/connectivity_state.h',
                       'src/core/lib/transport/metadata.h',
@@ -606,7 +605,6 @@ Pod::Spec.new do |s|
                               'src/core/lib/surface/init.h',
                               'src/core/lib/surface/lame_client.h',
                               'src/core/lib/surface/server.h',
-                              'src/core/lib/surface/surface_trace.h',
                               'src/core/lib/transport/byte_stream.h',
                               'src/core/lib/transport/connectivity_state.h',
                               'src/core/lib/transport/metadata.h',
diff --git a/grpc.gemspec b/grpc.gemspec
index 9f3ae048a70..e0a8ff00a42 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -240,7 +240,6 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/lib/surface/init.h )
   s.files += %w( src/core/lib/surface/lame_client.h )
   s.files += %w( src/core/lib/surface/server.h )
-  s.files += %w( src/core/lib/surface/surface_trace.h )
   s.files += %w( src/core/lib/transport/byte_stream.h )
   s.files += %w( src/core/lib/transport/connectivity_state.h )
   s.files += %w( src/core/lib/transport/metadata.h )
diff --git a/package.xml b/package.xml
index b25e42c1c01..fef06ef9eed 100644
--- a/package.xml
+++ b/package.xml
@@ -247,7 +247,6 @@
     <file baseinstalldir="/" name="src/core/lib/surface/init.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/surface/lame_client.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/surface/server.h" role="src" />
-    <file baseinstalldir="/" name="src/core/lib/surface/surface_trace.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/transport/byte_stream.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/transport/connectivity_state.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/transport/metadata.h" role="src" />
diff --git a/src/core/lib/debug/trace.c b/src/core/lib/debug/trace.c
index 555f497b784..c56046785b3 100644
--- a/src/core/lib/debug/trace.c
+++ b/src/core/lib/debug/trace.c
@@ -88,7 +88,11 @@ static void parse(const char *s) {
   split(s, &strings, &nstrings);
 
   for (i = 0; i < nstrings; i++) {
-    grpc_tracer_set_enabled(strings[i], 1);
+    if (strings[i][0] == '-') {
+      grpc_tracer_set_enabled(strings[i] + 1, 0);
+    } else {
+      grpc_tracer_set_enabled(strings[i], 1);
+    }
   }
 
   for (i = 0; i < nstrings; i++) {
@@ -117,7 +121,7 @@ int grpc_tracer_set_enabled(const char *name, int enabled) {
   tracer *t;
   if (0 == strcmp(name, "all")) {
     for (t = tracers; t; t = t->next) {
-      *t->flag = 1;
+      *t->flag = enabled;
     }
   } else {
     int found = 0;
diff --git a/src/core/lib/surface/call.h b/src/core/lib/surface/call.h
index b640345c21d..3a78fe3aa36 100644
--- a/src/core/lib/surface/call.h
+++ b/src/core/lib/surface/call.h
@@ -37,7 +37,6 @@
 #include "src/core/lib/channel/channel_stack.h"
 #include "src/core/lib/channel/context.h"
 #include "src/core/lib/surface/api_trace.h"
-#include "src/core/lib/surface/surface_trace.h"
 
 #include <grpc/grpc.h>
 #include <grpc/impl/codegen/compression_types.h>
diff --git a/src/core/lib/surface/completion_queue.c b/src/core/lib/surface/completion_queue.c
index 5eb7cf1bf4f..de2b674d0e0 100644
--- a/src/core/lib/surface/completion_queue.c
+++ b/src/core/lib/surface/completion_queue.c
@@ -48,7 +48,6 @@
 #include "src/core/lib/surface/api_trace.h"
 #include "src/core/lib/surface/call.h"
 #include "src/core/lib/surface/event_string.h"
-#include "src/core/lib/surface/surface_trace.h"
 
 typedef struct {
   grpc_pollset_worker **worker;
@@ -91,6 +90,18 @@ struct grpc_completion_queue {
 static gpr_mu g_freelist_mu;
 static grpc_completion_queue *g_freelist;
 
+int grpc_cq_pluck_trace;
+int grpc_cq_event_timeout_trace;
+
+#define GRPC_SURFACE_TRACE_RETURNED_EVENT(cq, event)                    \
+  if (grpc_api_trace &&                                                 \
+      (grpc_cq_pluck_trace || (event)->type != GRPC_QUEUE_TIMEOUT)) {   \
+    char *_ev = grpc_event_string(event);                               \
+    gpr_log(GPR_INFO, "RETURN_EVENT[%p]: %s", cq, _ev);                 \
+    gpr_free(_ev);                                                      \
+  }
+
+
 static void on_pollset_shutdown_done(grpc_exec_ctx *exec_ctx, void *cc,
                                      bool success);
 
@@ -396,13 +407,15 @@ grpc_event grpc_completion_queue_pluck(grpc_completion_queue *cc, void *tag,
 
   GPR_TIMER_BEGIN("grpc_completion_queue_pluck", 0);
 
-  GRPC_API_TRACE(
-      "grpc_completion_queue_pluck("
-      "cc=%p, tag=%p, "
-      "deadline=gpr_timespec { tv_sec: %lld, tv_nsec: %d, clock_type: %d }, "
-      "reserved=%p)",
-      6, (cc, tag, (long long)deadline.tv_sec, (int)deadline.tv_nsec,
-          (int)deadline.clock_type, reserved));
+  if (grpc_cq_pluck_trace) {
+    GRPC_API_TRACE(
+        "grpc_completion_queue_pluck("
+        "cc=%p, tag=%p, "
+        "deadline=gpr_timespec { tv_sec: %lld, tv_nsec: %d, clock_type: %d }, "
+        "reserved=%p)",
+        6, (cc, tag, (long long)deadline.tv_sec, (int)deadline.tv_nsec,
+            (int)deadline.clock_type, reserved));
+  }
   GPR_ASSERT(!reserved);
 
   deadline = gpr_convert_clock_type(deadline, GPR_CLOCK_MONOTONIC);
diff --git a/src/core/lib/surface/completion_queue.h b/src/core/lib/surface/completion_queue.h
index 3d0dd13c53b..108445b28f1 100644
--- a/src/core/lib/surface/completion_queue.h
+++ b/src/core/lib/surface/completion_queue.h
@@ -39,6 +39,9 @@
 #include <grpc/grpc.h>
 #include "src/core/lib/iomgr/pollset.h"
 
+extern int grpc_cq_pluck_trace;
+extern int grpc_cq_event_timeout_trace;
+
 typedef struct grpc_cq_completion {
   /** user supplied tag */
   void *tag;
diff --git a/src/core/lib/surface/init.c b/src/core/lib/surface/init.c
index 1c8b7090156..499ecffc2ae 100644
--- a/src/core/lib/surface/init.c
+++ b/src/core/lib/surface/init.c
@@ -57,7 +57,6 @@
 #include "src/core/lib/surface/init.h"
 #include "src/core/lib/surface/lame_client.h"
 #include "src/core/lib/surface/server.h"
-#include "src/core/lib/surface/surface_trace.h"
 #include "src/core/lib/transport/connectivity_state.h"
 #include "src/core/lib/transport/transport_impl.h"
 
@@ -165,6 +164,12 @@ void grpc_init(void) {
                          &grpc_trace_channel_stack_builder);
     grpc_register_tracer("http1", &grpc_http1_trace);
     grpc_register_tracer("compression", &grpc_compression_trace);
+    grpc_register_tracer("queue_pluck", &grpc_cq_pluck_trace);
+    // Default pluck trace to 1
+    grpc_cq_pluck_trace = 1;
+    grpc_register_tracer("queue_timeout", &grpc_cq_event_timeout_trace);
+    // Default timeout trace to 1
+    grpc_cq_event_timeout_trace = 1;
     grpc_security_pre_init();
     grpc_iomgr_init();
     grpc_executor_init();
diff --git a/src/core/lib/surface/surface_trace.h b/src/core/lib/surface/surface_trace.h
deleted file mode 100644
index a69a0fff577..00000000000
--- a/src/core/lib/surface/surface_trace.h
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#ifndef GRPC_CORE_LIB_SURFACE_SURFACE_TRACE_H
-#define GRPC_CORE_LIB_SURFACE_SURFACE_TRACE_H
-
-#include <grpc/support/log.h>
-#include "src/core/lib/debug/trace.h"
-#include "src/core/lib/surface/api_trace.h"
-
-#define GRPC_SURFACE_TRACE_RETURNED_EVENT(cq, event)    \
-  if (grpc_api_trace) {                                 \
-    char *_ev = grpc_event_string(event);               \
-    gpr_log(GPR_INFO, "RETURN_EVENT[%p]: %s", cq, _ev); \
-    gpr_free(_ev);                                      \
-  }
-
-#endif /* GRPC_CORE_LIB_SURFACE_SURFACE_TRACE_H */
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index aee866adf46..337ce16551a 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -857,7 +857,6 @@ src/core/lib/surface/event_string.h \
 src/core/lib/surface/init.h \
 src/core/lib/surface/lame_client.h \
 src/core/lib/surface/server.h \
-src/core/lib/surface/surface_trace.h \
 src/core/lib/transport/byte_stream.h \
 src/core/lib/transport/connectivity_state.h \
 src/core/lib/transport/metadata.h \
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index 4aad52c69d0..f9c497afcdd 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -5762,7 +5762,6 @@
       "src/core/lib/surface/init.h", 
       "src/core/lib/surface/lame_client.h", 
       "src/core/lib/surface/server.h", 
-      "src/core/lib/surface/surface_trace.h", 
       "src/core/lib/transport/byte_stream.h", 
       "src/core/lib/transport/connectivity_state.h", 
       "src/core/lib/transport/metadata.h", 
@@ -5921,7 +5920,6 @@
       "src/core/lib/surface/metadata_array.c", 
       "src/core/lib/surface/server.c", 
       "src/core/lib/surface/server.h", 
-      "src/core/lib/surface/surface_trace.h", 
       "src/core/lib/surface/validate_metadata.c", 
       "src/core/lib/surface/version.c", 
       "src/core/lib/transport/byte_stream.c", 
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj b/vsprojects/vcxproj/grpc/grpc.vcxproj
index ec0c984f2e7..c69623bf736 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj
@@ -366,7 +366,6 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\init.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\lame_client.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\server.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\surface_trace.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\transport\byte_stream.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\transport\connectivity_state.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\transport\metadata.h" />
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
index 273f73b2a30..593024993fa 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
@@ -839,9 +839,6 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\server.h">
       <Filter>src\core\lib\surface</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\surface_trace.h">
-      <Filter>src\core\lib\surface</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\transport\byte_stream.h">
       <Filter>src\core\lib\transport</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
index bba099d803c..28dcd8269eb 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
@@ -355,7 +355,6 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\init.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\lame_client.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\server.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\surface_trace.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\transport\byte_stream.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\transport\connectivity_state.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\transport\metadata.h" />
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index 78a8777f942..058ae653cad 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -749,9 +749,6 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\server.h">
       <Filter>src\core\lib\surface</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\surface_trace.h">
-      <Filter>src\core\lib\surface</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\transport\byte_stream.h">
       <Filter>src\core\lib\transport</Filter>
     </ClInclude>

From dbe2b9e976d50ce7971df32dc9a3122525dad3ce Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Wed, 15 Jun 2016 20:23:04 -0700
Subject: [PATCH 074/280] Enable treating warnings as errors in objc tests

---
 src/objective-c/tests/GRPCClientTests.m          | 16 ++++++++--------
 src/objective-c/tests/InteropTests.m             | 10 ++++++----
 .../tests/Tests.xcodeproj/project.pbxproj        |  4 ++++
 3 files changed, 18 insertions(+), 12 deletions(-)

diff --git a/src/objective-c/tests/GRPCClientTests.m b/src/objective-c/tests/GRPCClientTests.m
index 9a8d4253241..2eca7bf5498 100644
--- a/src/objective-c/tests/GRPCClientTests.m
+++ b/src/objective-c/tests/GRPCClientTests.m
@@ -48,9 +48,9 @@ static NSString * const kPackage = @"grpc.testing";
 static NSString * const kService = @"TestService";
 static NSString * const kRemoteSSLHost = @"grpc-test.sandbox.googleapis.com";
 
-static ProtoMethod *kInexistentMethod;
-static ProtoMethod *kEmptyCallMethod;
-static ProtoMethod *kUnaryCallMethod;
+static GRPCProtoMethod *kInexistentMethod;
+static GRPCProtoMethod *kEmptyCallMethod;
+static GRPCProtoMethod *kUnaryCallMethod;
 
 /** Observer class for testing that responseMetadata is KVO-compliant */
 @interface PassthroughObserver : NSObject
@@ -109,13 +109,13 @@ static ProtoMethod *kUnaryCallMethod;
   [GRPCCall useInsecureConnectionsForHost:kHostAddress];
 
   // This method isn't implemented by the remote server.
-  kInexistentMethod = [[ProtoMethod alloc] initWithPackage:kPackage
+  kInexistentMethod = [[GRPCProtoMethod alloc] initWithPackage:kPackage
                                                    service:kService
                                                     method:@"Inexistent"];
-  kEmptyCallMethod = [[ProtoMethod alloc] initWithPackage:kPackage
+  kEmptyCallMethod = [[GRPCProtoMethod alloc] initWithPackage:kPackage
                                                   service:kService
                                                    method:@"EmptyCall"];
-  kUnaryCallMethod = [[ProtoMethod alloc] initWithPackage:kPackage
+  kUnaryCallMethod = [[GRPCProtoMethod alloc] initWithPackage:kPackage
                                                   service:kService
                                                    method:@"UnaryCall"];
 }
@@ -303,7 +303,7 @@ static ProtoMethod *kUnaryCallMethod;
 
   // Try to set parameters to nil for GRPCCall. This should cause an exception
   @try {
-    GRPCCall *call = [[GRPCCall alloc] initWithHost:nil
+    GRPCCall *call __unused = [[GRPCCall alloc] initWithHost:nil
                                                path:nil
                                      requestsWriter:nil];
     XCTFail(@"Did not receive an exception when parameters are nil");
@@ -316,7 +316,7 @@ static ProtoMethod *kUnaryCallMethod;
   GRXWriter *requestsWriter = [GRXWriter emptyWriter];
   [requestsWriter finishWithError:nil];
   @try {
-    GRPCCall *call = [[GRPCCall alloc] initWithHost:kHostAddress
+    GRPCCall *call __unused = [[GRPCCall alloc] initWithHost:kHostAddress
                                                path:kUnaryCallMethod.HTTPPath
                                      requestsWriter:requestsWriter];
     XCTFail(@"Did not receive an exception when GRXWriter has incorrect state.");
diff --git a/src/objective-c/tests/InteropTests.m b/src/objective-c/tests/InteropTests.m
index 781c500f73e..60a83259fa6 100644
--- a/src/objective-c/tests/InteropTests.m
+++ b/src/objective-c/tests/InteropTests.m
@@ -58,7 +58,7 @@
                  requestedResponseSize:(NSNumber *)responseSize {
   RMTStreamingOutputCallRequest *request = [self message];
   RMTResponseParameters *parameters = [RMTResponseParameters message];
-  parameters.size = responseSize.integerValue;
+  parameters.size = (int)responseSize.integerValue;
   [request.responseParametersArray addObject:parameters];
   request.payload.body = [NSMutableData dataWithLength:payloadSize.unsignedIntegerValue];
   return request;
@@ -80,7 +80,9 @@
 
 #pragma mark Tests
 
+#ifdef GRPC_COMPILE_WITH_CRONET
 static cronet_engine *cronetEngine = NULL;
+#endif
 
 @implementation InteropTests {
   RMTTestService *_service;
@@ -186,7 +188,7 @@ static cronet_engine *cronetEngine = NULL;
   RMTStreamingOutputCallRequest *request = [RMTStreamingOutputCallRequest message];
   for (NSNumber *size in expectedSizes) {
     RMTResponseParameters *parameters = [RMTResponseParameters message];
-    parameters.size = [size integerValue];
+    parameters.size = (int)[size integerValue];
     [request.responseParametersArray addObject:parameters];
   }
 
@@ -282,7 +284,7 @@ static cronet_engine *cronetEngine = NULL;
   // A buffered pipe to which we never write any value acts as a writer that just hangs.
   GRXBufferedPipe *requestsBuffer = [[GRXBufferedPipe alloc] init];
 
-  ProtoRPC *call = [_service RPCToStreamingInputCallWithRequestsWriter:requestsBuffer
+  GRPCProtoCall *call = [_service RPCToStreamingInputCallWithRequestsWriter:requestsBuffer
                                                                handler:^(RMTStreamingInputCallResponse *response,
                                                                          NSError *error) {
     XCTAssertEqual(error.code, GRPC_STATUS_CANCELLED);
@@ -313,7 +315,7 @@ static cronet_engine *cronetEngine = NULL;
 
   [requestsBuffer writeValue:request];
 
-  __block ProtoRPC *call =
+  __block GRPCProtoCall *call =
       [_service RPCToFullDuplexCallWithRequestsWriter:requestsBuffer
                                          eventHandler:^(BOOL done,
                                                         RMTStreamingOutputCallResponse *response,
diff --git a/src/objective-c/tests/Tests.xcodeproj/project.pbxproj b/src/objective-c/tests/Tests.xcodeproj/project.pbxproj
index b0429617c01..59a6af2e11e 100644
--- a/src/objective-c/tests/Tests.xcodeproj/project.pbxproj
+++ b/src/objective-c/tests/Tests.xcodeproj/project.pbxproj
@@ -823,6 +823,7 @@
 					"$(inherited)",
 				);
 				GCC_SYMBOLS_PRIVATE_EXTERN = NO;
+				GCC_TREAT_WARNINGS_AS_ERRORS = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
 				GCC_WARN_UNDECLARED_SELECTOR = YES;
@@ -859,6 +860,7 @@
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu99;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_TREAT_WARNINGS_AS_ERRORS = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
 				GCC_WARN_UNDECLARED_SELECTOR = YES;
@@ -875,6 +877,7 @@
 		635697DC1B14FC11007A7283 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				GCC_TREAT_WARNINGS_AS_ERRORS = YES;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
 			};
@@ -883,6 +886,7 @@
 		635697DD1B14FC11007A7283 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				GCC_TREAT_WARNINGS_AS_ERRORS = YES;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
 			};

From bb2bd6553938ca1a192414084e5800178f67c4a3 Mon Sep 17 00:00:00 2001
From: murgatroid99 <mlumish@google.com>
Date: Thu, 16 Jun 2016 09:29:53 -0700
Subject: [PATCH 075/280] Clang format

---
 src/core/lib/surface/completion_queue.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/core/lib/surface/completion_queue.c b/src/core/lib/surface/completion_queue.c
index de2b674d0e0..03de97bc2b5 100644
--- a/src/core/lib/surface/completion_queue.c
+++ b/src/core/lib/surface/completion_queue.c
@@ -93,12 +93,12 @@ static grpc_completion_queue *g_freelist;
 int grpc_cq_pluck_trace;
 int grpc_cq_event_timeout_trace;
 
-#define GRPC_SURFACE_TRACE_RETURNED_EVENT(cq, event)                    \
-  if (grpc_api_trace &&                                                 \
-      (grpc_cq_pluck_trace || (event)->type != GRPC_QUEUE_TIMEOUT)) {   \
-    char *_ev = grpc_event_string(event);                               \
-    gpr_log(GPR_INFO, "RETURN_EVENT[%p]: %s", cq, _ev);                 \
-    gpr_free(_ev);                                                      \
+#define GRPC_SURFACE_TRACE_RETURNED_EVENT(cq, event)                  \
+  if (grpc_api_trace &&                                               \
+      (grpc_cq_pluck_trace || (event)->type != GRPC_QUEUE_TIMEOUT)) { \
+    char *_ev = grpc_event_string(event);                             \
+    gpr_log(GPR_INFO, "RETURN_EVENT[%p]: %s", cq, _ev);               \
+    gpr_free(_ev);                                                    \
   }
 
 

From a7cc90055e91b1bda2e916c5884b5305c7f73b53 Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@google.com>
Date: Thu, 16 Jun 2016 09:59:51 -0700
Subject: [PATCH 076/280] Modified route_guide sample app to show RPC log

Modified the screens to show meaningful information about RPC progress.
When you click on each tab the screen now shows log messages that previously
only went to the debug console.
---
 .../Misc/Base.lproj/Main.storyboard           | 108 ++++++++++--------
 .../objective-c/route_guide/ViewControllers.m |  41 +++++++
 2 files changed, 102 insertions(+), 47 deletions(-)

diff --git a/examples/objective-c/route_guide/Misc/Base.lproj/Main.storyboard b/examples/objective-c/route_guide/Misc/Base.lproj/Main.storyboard
index 9bf9498d62c..306320f7d89 100644
--- a/examples/objective-c/route_guide/Misc/Base.lproj/Main.storyboard
+++ b/examples/objective-c/route_guide/Misc/Base.lproj/Main.storyboard
@@ -1,7 +1,8 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="7702" systemVersion="14D131" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="49e-Tb-3d3">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="10116" systemVersion="15F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="49e-Tb-3d3">
     <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="7701"/>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="10085"/>
     </dependencies>
     <scenes>
         <!--Get Feature-->
@@ -16,33 +17,35 @@
                         <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                         <subviews>
-                            <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="scaleToFill" text="Get Feature Demo" textAlignment="center" lineBreakMode="tailTruncation" minimumFontSize="10" translatesAutoresizingMaskIntoConstraints="NO" id="KQZ-1w-vlD">
-                                <rect key="frame" x="150" y="279" width="299" height="42"/>
-                                <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
-                                <fontDescription key="fontDescription" name="Helvetica" family="Helvetica" pointSize="36"/>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" ambiguous="YES" misplaced="YES" text="Execution log:" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="au7-AW-5ov">
+                                <rect key="frame" x="16" y="0.0" width="257" height="61"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
                                 <color key="textColor" red="0.0" green="0.0" blue="0.0" alpha="1" colorSpace="calibratedRGB"/>
                                 <nil key="highlightedColor"/>
                             </label>
-                            <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" misplaced="YES" text="See ViewControllers.m and this app's log in XCode" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="A5M-7J-77L">
-                                <rect key="frame" x="136" y="329" width="329" height="17"/>
-                                <fontDescription key="fontDescription" type="system" pointSize="14"/>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" fixedFrame="YES" text="Label" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="2ga-Gd-X9q">
+                                <rect key="frame" x="20" y="82" width="560" height="437"/>
+                                <accessibility key="accessibilityConfiguration">
+                                    <accessibilityTraits key="traits" link="YES"/>
+                                </accessibility>
+                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
                                 <color key="textColor" red="0.0" green="0.0" blue="0.0" alpha="1" colorSpace="calibratedRGB"/>
                                 <nil key="highlightedColor"/>
                             </label>
                         </subviews>
                         <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
                         <constraints>
-                            <constraint firstAttribute="centerX" secondItem="KQZ-1w-vlD" secondAttribute="centerX" id="6BV-lF-sBN"/>
-                            <constraint firstItem="A5M-7J-77L" firstAttribute="top" secondItem="KQZ-1w-vlD" secondAttribute="bottom" constant="8" symbolic="YES" id="cfb-er-3JN"/>
-                            <constraint firstItem="A5M-7J-77L" firstAttribute="centerX" secondItem="KQZ-1w-vlD" secondAttribute="centerX" id="e1l-AV-tCB"/>
-                            <constraint firstAttribute="centerY" secondItem="KQZ-1w-vlD" secondAttribute="centerY" id="exm-UA-ej4"/>
+                            <constraint firstItem="au7-AW-5ov" firstAttribute="centerX" secondItem="tsR-hK-woN" secondAttribute="centerX" constant="20" id="JAX-zf-Z1I"/>
                         </constraints>
                     </view>
                     <tabBarItem key="tabBarItem" title="Get Feature" image="first" id="acW-dT-cKf"/>
+                    <connections>
+                        <outlet property="output_label" destination="2ga-Gd-X9q" id="yXF-xa-kbD"/>
+                    </connections>
                 </viewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="W5J-7L-Pyd" sceneMemberID="firstResponder"/>
             </objects>
-            <point key="canvasLocation" x="718" y="-660"/>
+            <point key="canvasLocation" x="733" y="-653"/>
         </scene>
         <!--List Features-->
         <scene sceneID="wg7-f3-ORb">
@@ -56,29 +59,35 @@
                         <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                         <subviews>
-                            <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="scaleToFill" text="List Features Demo" textAlignment="center" lineBreakMode="tailTruncation" minimumFontSize="10" translatesAutoresizingMaskIntoConstraints="NO" id="zEq-FU-wV5">
-                                <rect key="frame" x="143" y="279" width="315" height="42"/>
-                                <color key="backgroundColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
-                                <fontDescription key="fontDescription" name="Helvetica" family="Helvetica" pointSize="36"/>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" fixedFrame="YES" text="Label" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="8mE-gq-NQc">
+                                <rect key="frame" x="20" y="114" width="560" height="437"/>
+                                <accessibility key="accessibilityConfiguration">
+                                    <accessibilityTraits key="traits" link="YES"/>
+                                </accessibility>
+                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
                                 <color key="textColor" red="0.0" green="0.0" blue="0.0" alpha="1" colorSpace="calibratedRGB"/>
                                 <nil key="highlightedColor"/>
                             </label>
-                            <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="See ViewControllers.m and this app's log in XCode" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="NDk-cv-Gan">
-                                <rect key="frame" x="136" y="329" width="329" height="17"/>
-                                <fontDescription key="fontDescription" type="system" pointSize="14"/>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" ambiguous="YES" misplaced="YES" text="Execution log:" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="DbB-M0-xs2">
+                                <rect key="frame" x="50" y="12" width="257" height="61"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
                                 <color key="textColor" red="0.0" green="0.0" blue="0.0" alpha="1" colorSpace="calibratedRGB"/>
                                 <nil key="highlightedColor"/>
                             </label>
                         </subviews>
                         <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
+                        <accessibility key="accessibilityConfiguration">
+                            <accessibilityTraits key="traits" staticText="YES"/>
+                        </accessibility>
                         <constraints>
-                            <constraint firstItem="NDk-cv-Gan" firstAttribute="top" secondItem="zEq-FU-wV5" secondAttribute="bottom" constant="8" symbolic="YES" id="Day-4N-Vmt"/>
-                            <constraint firstItem="NDk-cv-Gan" firstAttribute="centerX" secondItem="zEq-FU-wV5" secondAttribute="centerX" id="JgO-Fn-dHn"/>
-                            <constraint firstAttribute="centerX" secondItem="zEq-FU-wV5" secondAttribute="centerX" id="qqM-NS-xev"/>
-                            <constraint firstAttribute="centerY" secondItem="zEq-FU-wV5" secondAttribute="centerY" id="qzY-Ky-pLD"/>
+                            <constraint firstItem="DbB-M0-xs2" firstAttribute="centerX" secondItem="QS5-Rx-YEW" secondAttribute="centerX" constant="20" id="UDo-WG-7i3"/>
+                            <constraint firstItem="DbB-M0-xs2" firstAttribute="centerX" secondItem="QS5-Rx-YEW" secondAttribute="centerX" constant="20" id="W7v-LC-HjP"/>
                         </constraints>
                     </view>
                     <tabBarItem key="tabBarItem" title="List Features" image="second" id="cPa-gy-q4n"/>
+                    <connections>
+                        <outlet property="output_label" destination="8mE-gq-NQc" id="6rw-Kd-21X"/>
+                    </connections>
                 </viewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="4Nw-L8-lE0" sceneMemberID="firstResponder"/>
             </objects>
@@ -117,29 +126,32 @@
                         <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                         <subviews>
-                            <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="scaleToFill" text="Record Route Demo" textAlignment="center" lineBreakMode="tailTruncation" minimumFontSize="10" translatesAutoresizingMaskIntoConstraints="NO" id="Nqv-Vr-o8P">
-                                <rect key="frame" x="136" y="279" width="329" height="42"/>
-                                <color key="backgroundColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
-                                <fontDescription key="fontDescription" name="Helvetica" family="Helvetica" pointSize="36"/>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" ambiguous="YES" misplaced="YES" text="Label" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="9wL-iS-tp8">
+                                <rect key="frame" x="20" y="114" width="560" height="437"/>
+                                <accessibility key="accessibilityConfiguration">
+                                    <accessibilityTraits key="traits" link="YES"/>
+                                </accessibility>
+                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
                                 <color key="textColor" red="0.0" green="0.0" blue="0.0" alpha="1" colorSpace="calibratedRGB"/>
                                 <nil key="highlightedColor"/>
                             </label>
-                            <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="See ViewControllers.m and this app's log in XCode" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="xjS-0N-tLe">
-                                <rect key="frame" x="136" y="329" width="329" height="17"/>
-                                <fontDescription key="fontDescription" type="system" pointSize="14"/>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" ambiguous="YES" misplaced="YES" text="Execution log:" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="5qv-tY-qxl">
+                                <rect key="frame" x="30" y="10" width="257" height="61"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
                                 <color key="textColor" red="0.0" green="0.0" blue="0.0" alpha="1" colorSpace="calibratedRGB"/>
                                 <nil key="highlightedColor"/>
                             </label>
                         </subviews>
                         <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
                         <constraints>
-                            <constraint firstAttribute="centerX" secondItem="Nqv-Vr-o8P" secondAttribute="centerX" id="1wf-uc-57y"/>
-                            <constraint firstItem="xjS-0N-tLe" firstAttribute="centerX" secondItem="Nqv-Vr-o8P" secondAttribute="centerX" id="Gnh-rN-EQ3"/>
-                            <constraint firstItem="xjS-0N-tLe" firstAttribute="top" secondItem="Nqv-Vr-o8P" secondAttribute="bottom" constant="8" symbolic="YES" id="Xhj-u3-th9"/>
-                            <constraint firstAttribute="centerY" secondItem="Nqv-Vr-o8P" secondAttribute="centerY" id="xqU-v8-Bb3"/>
+                            <constraint firstItem="9wL-iS-tp8" firstAttribute="centerX" secondItem="Wvj-mg-YnO" secondAttribute="centerX" constant="20" id="7TX-Jm-662"/>
+                            <constraint firstItem="5qv-tY-qxl" firstAttribute="centerX" secondItem="Wvj-mg-YnO" secondAttribute="centerX" id="mRS-9u-c2a"/>
                         </constraints>
                     </view>
                     <tabBarItem key="tabBarItem" title="Record Route" image="first" id="PLK-Jm-UyM"/>
+                    <connections>
+                        <outlet property="output_label" destination="9wL-iS-tp8" id="xhd-zm-66g"/>
+                    </connections>
                 </viewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="9RW-dt-a4q" sceneMemberID="firstResponder"/>
             </objects>
@@ -157,29 +169,31 @@
                         <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                         <subviews>
-                            <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="scaleToFill" text="Route Chat Demo" textAlignment="center" lineBreakMode="tailTruncation" minimumFontSize="10" translatesAutoresizingMaskIntoConstraints="NO" id="zUL-Bo-wJt">
-                                <rect key="frame" x="156" y="279" width="289" height="42"/>
-                                <color key="backgroundColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
-                                <fontDescription key="fontDescription" name="Helvetica" family="Helvetica" pointSize="36"/>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" ambiguous="YES" misplaced="YES" text="Execution log:" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="BxD-G9-xhU">
+                                <rect key="frame" x="20" y="10" width="257" height="61"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
                                 <color key="textColor" red="0.0" green="0.0" blue="0.0" alpha="1" colorSpace="calibratedRGB"/>
                                 <nil key="highlightedColor"/>
                             </label>
-                            <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="See ViewControllers.m and this app's log in XCode" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="CgS-1q-Od9">
-                                <rect key="frame" x="136" y="329" width="329" height="17"/>
-                                <fontDescription key="fontDescription" type="system" pointSize="14"/>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" fixedFrame="YES" text="Label" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="131-U2-Ogk">
+                                <rect key="frame" x="20" y="114" width="560" height="437"/>
+                                <accessibility key="accessibilityConfiguration">
+                                    <accessibilityTraits key="traits" link="YES"/>
+                                </accessibility>
+                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
                                 <color key="textColor" red="0.0" green="0.0" blue="0.0" alpha="1" colorSpace="calibratedRGB"/>
                                 <nil key="highlightedColor"/>
                             </label>
                         </subviews>
                         <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
                         <constraints>
-                            <constraint firstAttribute="centerY" secondItem="zUL-Bo-wJt" secondAttribute="centerY" id="5hM-q1-ZjM"/>
-                            <constraint firstItem="CgS-1q-Od9" firstAttribute="top" secondItem="zUL-Bo-wJt" secondAttribute="bottom" constant="8" symbolic="YES" id="AqI-Ra-a5O"/>
-                            <constraint firstItem="CgS-1q-Od9" firstAttribute="centerX" secondItem="zUL-Bo-wJt" secondAttribute="centerX" id="K8f-KI-bc6"/>
-                            <constraint firstAttribute="centerX" secondItem="zUL-Bo-wJt" secondAttribute="centerX" id="n8b-x8-Yze"/>
+                            <constraint firstItem="BxD-G9-xhU" firstAttribute="centerX" secondItem="c9d-af-OMP" secondAttribute="centerX" id="wSw-7t-wxX"/>
                         </constraints>
                     </view>
                     <tabBarItem key="tabBarItem" title="Route Chat" image="second" id="p2G-IC-yAR"/>
+                    <connections>
+                        <outlet property="output_label" destination="131-U2-Ogk" id="fNw-M5-x1D"/>
+                    </connections>
                 </viewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="yUz-se-Cfi" sceneMemberID="firstResponder"/>
             </objects>
diff --git a/examples/objective-c/route_guide/ViewControllers.m b/examples/objective-c/route_guide/ViewControllers.m
index e32978240b6..b916a4ee0c4 100644
--- a/examples/objective-c/route_guide/ViewControllers.m
+++ b/examples/objective-c/route_guide/ViewControllers.m
@@ -83,6 +83,7 @@ static NSString * const kHostAddress = @"localhost:50051";
 @interface GetFeatureViewController : UIViewController {
   RTGRouteGuide *service;
 }
+@property (weak, nonatomic) IBOutlet UILabel *output_label;
 @end
 
 @implementation GetFeatureViewController
@@ -90,10 +91,16 @@ static NSString * const kHostAddress = @"localhost:50051";
 - (void)execRequest {
   void (^handler)(RTGFeature *response, NSError *error) = ^(RTGFeature *response, NSError *error) {
     if (response.name.length) {
+      NSString *str =[NSString stringWithFormat:@"%@\nFound feature called %@ at %@.", self.output_label.text, response.location, response.name];
+      self.output_label.text = str;
       NSLog(@"Found feature called %@ at %@.", response.name, response.location);
     } else if (response) {
+      NSString *str =[NSString stringWithFormat:@"%@\nFound no features at %@",  self.output_label.text,response.location];
+      self.output_label.text = str;
       NSLog(@"Found no features at %@", response.location);
     } else {
+      NSString *str =[NSString stringWithFormat:@"%@\nRPC error: %@", self.output_label.text, error];
+      self.output_label.text = str;
       NSLog(@"RPC error: %@", error);
     }
   };
@@ -116,6 +123,9 @@ static NSString * const kHostAddress = @"localhost:50051";
 }
 
 - (void)viewDidAppear:(BOOL)animated {
+  self.output_label.text = @"RPC log:";
+  self.output_label.numberOfLines = 0;
+  self.output_label.font = [UIFont fontWithName:@"Helvetica Neue" size:8.0];
   [self execRequest];
 }
 
@@ -131,6 +141,7 @@ static NSString * const kHostAddress = @"localhost:50051";
 @interface ListFeaturesViewController : UIViewController {
   RTGRouteGuide *service;
 }
+@property (weak, nonatomic) IBOutlet UILabel *output_label;
 
 @end
 
@@ -147,8 +158,12 @@ static NSString * const kHostAddress = @"localhost:50051";
   [service listFeaturesWithRequest:rectangle
                       eventHandler:^(BOOL done, RTGFeature *response, NSError *error) {
     if (response) {
+      NSString *str =[NSString stringWithFormat:@"%@\nFound feature at %@ called %@.", self.output_label.text, response.location, response.name];
+      self.output_label.text = str;
       NSLog(@"Found feature at %@ called %@.", response.location, response.name);
     } else if (error) {
+      NSString *str =[NSString stringWithFormat:@"%@\nRPC error: %@", self.output_label.text, error];
+      self.output_label.text = str;
       NSLog(@"RPC error: %@", error);
     }
   }];
@@ -161,6 +176,9 @@ static NSString * const kHostAddress = @"localhost:50051";
 }
 
 - (void)viewDidAppear:(BOOL)animated {
+  self.output_label.text = @"RPC log:";
+  self.output_label.numberOfLines = 0;
+  self.output_label.font = [UIFont fontWithName:@"Helvetica Neue" size:8.0];
   [self execRequest];
 }
 
@@ -177,6 +195,7 @@ static NSString * const kHostAddress = @"localhost:50051";
 @interface RecordRouteViewController : UIViewController {
   RTGRouteGuide *service;
 }
+@property (weak, nonatomic) IBOutlet UILabel *output_label;
 
 @end
 
@@ -192,6 +211,8 @@ static NSString * const kHostAddress = @"localhost:50051";
     RTGPoint *location = [RTGPoint message];
     location.longitude = [((NSNumber *) feature[@"location"][@"longitude"]) intValue];
     location.latitude = [((NSNumber *) feature[@"location"][@"latitude"]) intValue];
+    NSString *str =[NSString stringWithFormat:@"%@\nVisiting point %@", self.output_label.text, location];
+    self.output_label.text = str;
     NSLog(@"Visiting point %@", location);
     return location;
   }];
@@ -199,11 +220,19 @@ static NSString * const kHostAddress = @"localhost:50051";
   [service recordRouteWithRequestsWriter:locations
                                  handler:^(RTGRouteSummary *response, NSError *error) {
     if (response) {
+      NSString *str =[NSString stringWithFormat:
+                      @"%@\nFinished trip with %i points\nPassed %i features\n"
+                      "Travelled %i meters\nIt took %i seconds",
+                      self.output_label.text, response.pointCount, response.featureCount,
+                      response.distance, response.elapsedTime];
+      self.output_label.text = str;
       NSLog(@"Finished trip with %i points", response.pointCount);
       NSLog(@"Passed %i features", response.featureCount);
       NSLog(@"Travelled %i meters", response.distance);
       NSLog(@"It took %i seconds", response.elapsedTime);
     } else {
+      NSString *str =[NSString stringWithFormat:@"%@\nRPC error: %@", self.output_label.text, error];
+      self.output_label.text = str; 
       NSLog(@"RPC error: %@", error);
     }
   }];
@@ -216,6 +245,9 @@ static NSString * const kHostAddress = @"localhost:50051";
 }
 
 - (void)viewDidAppear:(BOOL)animated {
+  self.output_label.text = @"RPC log:";
+  self.output_label.numberOfLines = 0;
+  self.output_label.font = [UIFont fontWithName:@"Helvetica Neue" size:8.0];
   [self execRequest];
 }
 
@@ -231,6 +263,7 @@ static NSString * const kHostAddress = @"localhost:50051";
 @interface RouteChatViewController : UIViewController {
   RTGRouteGuide *service;
 }
+@property (weak, nonatomic) IBOutlet UILabel *output_label;
 
 @end
 
@@ -249,8 +282,13 @@ static NSString * const kHostAddress = @"localhost:50051";
   [service routeChatWithRequestsWriter:notesWriter
                           eventHandler:^(BOOL done, RTGRouteNote *note, NSError *error) {
     if (note) {
+      NSString *str =[NSString stringWithFormat:@"%@\nGot message %@ at %@",
+                      self.output_label.text, note.message, note.location];
+      self.output_label.text = str;
       NSLog(@"Got message %@ at %@", note.message, note.location);
     } else if (error) {
+      NSString *str =[NSString stringWithFormat:@"%@\nRPC error: %@", self.output_label.text, error];
+      self.output_label.text = str;
       NSLog(@"RPC error: %@", error);
     }
     if (done) {
@@ -266,6 +304,9 @@ static NSString * const kHostAddress = @"localhost:50051";
 }
 
 - (void)viewDidAppear:(BOOL)animated {
+  self.output_label.text = @"RPC log:";
+  self.output_label.numberOfLines = 0;
+  self.output_label.font = [UIFont fontWithName:@"Helvetica Neue" size:8.0];
   [self execRequest];
 }
 

From 3eba9075ef612f83c363868c24d106580ab25223 Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@google.com>
Date: Thu, 16 Jun 2016 10:15:32 -0700
Subject: [PATCH 077/280] using camelCase for output_label now

---
 .../Misc/Base.lproj/Main.storyboard           |  8 +-
 .../objective-c/route_guide/ViewControllers.m | 74 +++++++++----------
 2 files changed, 41 insertions(+), 41 deletions(-)

diff --git a/examples/objective-c/route_guide/Misc/Base.lproj/Main.storyboard b/examples/objective-c/route_guide/Misc/Base.lproj/Main.storyboard
index 306320f7d89..5ca9f4642b9 100644
--- a/examples/objective-c/route_guide/Misc/Base.lproj/Main.storyboard
+++ b/examples/objective-c/route_guide/Misc/Base.lproj/Main.storyboard
@@ -40,7 +40,7 @@
                     </view>
                     <tabBarItem key="tabBarItem" title="Get Feature" image="first" id="acW-dT-cKf"/>
                     <connections>
-                        <outlet property="output_label" destination="2ga-Gd-X9q" id="yXF-xa-kbD"/>
+                        <outlet property="outputLabel" destination="2ga-Gd-X9q" id="yXF-xa-kbD"/>
                     </connections>
                 </viewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="W5J-7L-Pyd" sceneMemberID="firstResponder"/>
@@ -86,7 +86,7 @@
                     </view>
                     <tabBarItem key="tabBarItem" title="List Features" image="second" id="cPa-gy-q4n"/>
                     <connections>
-                        <outlet property="output_label" destination="8mE-gq-NQc" id="6rw-Kd-21X"/>
+                        <outlet property="outputLabel" destination="8mE-gq-NQc" id="6rw-Kd-21X"/>
                     </connections>
                 </viewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="4Nw-L8-lE0" sceneMemberID="firstResponder"/>
@@ -150,7 +150,7 @@
                     </view>
                     <tabBarItem key="tabBarItem" title="Record Route" image="first" id="PLK-Jm-UyM"/>
                     <connections>
-                        <outlet property="output_label" destination="9wL-iS-tp8" id="xhd-zm-66g"/>
+                        <outlet property="outputLabel" destination="9wL-iS-tp8" id="xhd-zm-66g"/>
                     </connections>
                 </viewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="9RW-dt-a4q" sceneMemberID="firstResponder"/>
@@ -192,7 +192,7 @@
                     </view>
                     <tabBarItem key="tabBarItem" title="Route Chat" image="second" id="p2G-IC-yAR"/>
                     <connections>
-                        <outlet property="output_label" destination="131-U2-Ogk" id="fNw-M5-x1D"/>
+                        <outlet property="outputLabel" destination="131-U2-Ogk" id="fNw-M5-x1D"/>
                     </connections>
                 </viewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="yUz-se-Cfi" sceneMemberID="firstResponder"/>
diff --git a/examples/objective-c/route_guide/ViewControllers.m b/examples/objective-c/route_guide/ViewControllers.m
index b916a4ee0c4..1e84c334728 100644
--- a/examples/objective-c/route_guide/ViewControllers.m
+++ b/examples/objective-c/route_guide/ViewControllers.m
@@ -37,7 +37,7 @@
 #import <RxLibrary/GRXWriter+Immediate.h>
 #import <RxLibrary/GRXWriter+Transformations.h>
 
-static NSString * const kHostAddress = @"localhost:50051";
+static NSString * const kHostAddress = @"192.168.1.120:50051";
 
 /** Category to override RTGPoint's description. */
 @interface RTGPoint (Description)
@@ -83,7 +83,7 @@ static NSString * const kHostAddress = @"localhost:50051";
 @interface GetFeatureViewController : UIViewController {
   RTGRouteGuide *service;
 }
-@property (weak, nonatomic) IBOutlet UILabel *output_label;
+@property (weak, nonatomic) IBOutlet UILabel *outputLabel;
 @end
 
 @implementation GetFeatureViewController
@@ -91,16 +91,16 @@ static NSString * const kHostAddress = @"localhost:50051";
 - (void)execRequest {
   void (^handler)(RTGFeature *response, NSError *error) = ^(RTGFeature *response, NSError *error) {
     if (response.name.length) {
-      NSString *str =[NSString stringWithFormat:@"%@\nFound feature called %@ at %@.", self.output_label.text, response.location, response.name];
-      self.output_label.text = str;
+      NSString *str =[NSString stringWithFormat:@"%@\nFound feature called %@ at %@.", self.outputLabel.text, response.location, response.name];
+      self.outputLabel.text = str;
       NSLog(@"Found feature called %@ at %@.", response.name, response.location);
     } else if (response) {
-      NSString *str =[NSString stringWithFormat:@"%@\nFound no features at %@",  self.output_label.text,response.location];
-      self.output_label.text = str;
+      NSString *str =[NSString stringWithFormat:@"%@\nFound no features at %@",  self.outputLabel.text,response.location];
+      self.outputLabel.text = str;
       NSLog(@"Found no features at %@", response.location);
     } else {
-      NSString *str =[NSString stringWithFormat:@"%@\nRPC error: %@", self.output_label.text, error];
-      self.output_label.text = str;
+      NSString *str =[NSString stringWithFormat:@"%@\nRPC error: %@", self.outputLabel.text, error];
+      self.outputLabel.text = str;
       NSLog(@"RPC error: %@", error);
     }
   };
@@ -123,9 +123,9 @@ static NSString * const kHostAddress = @"localhost:50051";
 }
 
 - (void)viewDidAppear:(BOOL)animated {
-  self.output_label.text = @"RPC log:";
-  self.output_label.numberOfLines = 0;
-  self.output_label.font = [UIFont fontWithName:@"Helvetica Neue" size:8.0];
+  self.outputLabel.text = @"RPC log:";
+  self.outputLabel.numberOfLines = 0;
+  self.outputLabel.font = [UIFont fontWithName:@"Helvetica Neue" size:8.0];
   [self execRequest];
 }
 
@@ -141,7 +141,7 @@ static NSString * const kHostAddress = @"localhost:50051";
 @interface ListFeaturesViewController : UIViewController {
   RTGRouteGuide *service;
 }
-@property (weak, nonatomic) IBOutlet UILabel *output_label;
+@property (weak, nonatomic) IBOutlet UILabel *outputLabel;
 
 @end
 
@@ -158,12 +158,12 @@ static NSString * const kHostAddress = @"localhost:50051";
   [service listFeaturesWithRequest:rectangle
                       eventHandler:^(BOOL done, RTGFeature *response, NSError *error) {
     if (response) {
-      NSString *str =[NSString stringWithFormat:@"%@\nFound feature at %@ called %@.", self.output_label.text, response.location, response.name];
-      self.output_label.text = str;
+      NSString *str =[NSString stringWithFormat:@"%@\nFound feature at %@ called %@.", self.outputLabel.text, response.location, response.name];
+      self.outputLabel.text = str;
       NSLog(@"Found feature at %@ called %@.", response.location, response.name);
     } else if (error) {
-      NSString *str =[NSString stringWithFormat:@"%@\nRPC error: %@", self.output_label.text, error];
-      self.output_label.text = str;
+      NSString *str =[NSString stringWithFormat:@"%@\nRPC error: %@", self.outputLabel.text, error];
+      self.outputLabel.text = str;
       NSLog(@"RPC error: %@", error);
     }
   }];
@@ -176,9 +176,9 @@ static NSString * const kHostAddress = @"localhost:50051";
 }
 
 - (void)viewDidAppear:(BOOL)animated {
-  self.output_label.text = @"RPC log:";
-  self.output_label.numberOfLines = 0;
-  self.output_label.font = [UIFont fontWithName:@"Helvetica Neue" size:8.0];
+  self.outputLabel.text = @"RPC log:";
+  self.outputLabel.numberOfLines = 0;
+  self.outputLabel.font = [UIFont fontWithName:@"Helvetica Neue" size:8.0];
   [self execRequest];
 }
 
@@ -195,7 +195,7 @@ static NSString * const kHostAddress = @"localhost:50051";
 @interface RecordRouteViewController : UIViewController {
   RTGRouteGuide *service;
 }
-@property (weak, nonatomic) IBOutlet UILabel *output_label;
+@property (weak, nonatomic) IBOutlet UILabel *outputLabel;
 
 @end
 
@@ -211,8 +211,8 @@ static NSString * const kHostAddress = @"localhost:50051";
     RTGPoint *location = [RTGPoint message];
     location.longitude = [((NSNumber *) feature[@"location"][@"longitude"]) intValue];
     location.latitude = [((NSNumber *) feature[@"location"][@"latitude"]) intValue];
-    NSString *str =[NSString stringWithFormat:@"%@\nVisiting point %@", self.output_label.text, location];
-    self.output_label.text = str;
+    NSString *str =[NSString stringWithFormat:@"%@\nVisiting point %@", self.outputLabel.text, location];
+    self.outputLabel.text = str;
     NSLog(@"Visiting point %@", location);
     return location;
   }];
@@ -223,16 +223,16 @@ static NSString * const kHostAddress = @"localhost:50051";
       NSString *str =[NSString stringWithFormat:
                       @"%@\nFinished trip with %i points\nPassed %i features\n"
                       "Travelled %i meters\nIt took %i seconds",
-                      self.output_label.text, response.pointCount, response.featureCount,
+                      self.outputLabel.text, response.pointCount, response.featureCount,
                       response.distance, response.elapsedTime];
-      self.output_label.text = str;
+      self.outputLabel.text = str;
       NSLog(@"Finished trip with %i points", response.pointCount);
       NSLog(@"Passed %i features", response.featureCount);
       NSLog(@"Travelled %i meters", response.distance);
       NSLog(@"It took %i seconds", response.elapsedTime);
     } else {
-      NSString *str =[NSString stringWithFormat:@"%@\nRPC error: %@", self.output_label.text, error];
-      self.output_label.text = str; 
+      NSString *str =[NSString stringWithFormat:@"%@\nRPC error: %@", self.outputLabel.text, error];
+      self.outputLabel.text = str; 
       NSLog(@"RPC error: %@", error);
     }
   }];
@@ -245,9 +245,9 @@ static NSString * const kHostAddress = @"localhost:50051";
 }
 
 - (void)viewDidAppear:(BOOL)animated {
-  self.output_label.text = @"RPC log:";
-  self.output_label.numberOfLines = 0;
-  self.output_label.font = [UIFont fontWithName:@"Helvetica Neue" size:8.0];
+  self.outputLabel.text = @"RPC log:";
+  self.outputLabel.numberOfLines = 0;
+  self.outputLabel.font = [UIFont fontWithName:@"Helvetica Neue" size:8.0];
   [self execRequest];
 }
 
@@ -263,7 +263,7 @@ static NSString * const kHostAddress = @"localhost:50051";
 @interface RouteChatViewController : UIViewController {
   RTGRouteGuide *service;
 }
-@property (weak, nonatomic) IBOutlet UILabel *output_label;
+@property (weak, nonatomic) IBOutlet UILabel *outputLabel;
 
 @end
 
@@ -283,12 +283,12 @@ static NSString * const kHostAddress = @"localhost:50051";
                           eventHandler:^(BOOL done, RTGRouteNote *note, NSError *error) {
     if (note) {
       NSString *str =[NSString stringWithFormat:@"%@\nGot message %@ at %@",
-                      self.output_label.text, note.message, note.location];
-      self.output_label.text = str;
+                      self.outputLabel.text, note.message, note.location];
+      self.outputLabel.text = str;
       NSLog(@"Got message %@ at %@", note.message, note.location);
     } else if (error) {
-      NSString *str =[NSString stringWithFormat:@"%@\nRPC error: %@", self.output_label.text, error];
-      self.output_label.text = str;
+      NSString *str =[NSString stringWithFormat:@"%@\nRPC error: %@", self.outputLabel.text, error];
+      self.outputLabel.text = str;
       NSLog(@"RPC error: %@", error);
     }
     if (done) {
@@ -304,9 +304,9 @@ static NSString * const kHostAddress = @"localhost:50051";
 }
 
 - (void)viewDidAppear:(BOOL)animated {
-  self.output_label.text = @"RPC log:";
-  self.output_label.numberOfLines = 0;
-  self.output_label.font = [UIFont fontWithName:@"Helvetica Neue" size:8.0];
+  self.outputLabel.text = @"RPC log:";
+  self.outputLabel.numberOfLines = 0;
+  self.outputLabel.font = [UIFont fontWithName:@"Helvetica Neue" size:8.0];
   [self execRequest];
 }
 

From 05998dc6939bb7ad4230775bb5ac87696ae9e29b Mon Sep 17 00:00:00 2001
From: murgatroid99 <mlumish@google.com>
Date: Thu, 16 Jun 2016 10:16:44 -0700
Subject: [PATCH 078/280] More formatting fixes

---
 src/core/lib/surface/completion_queue.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/core/lib/surface/completion_queue.c b/src/core/lib/surface/completion_queue.c
index 03de97bc2b5..d70f1721463 100644
--- a/src/core/lib/surface/completion_queue.c
+++ b/src/core/lib/surface/completion_queue.c
@@ -101,7 +101,6 @@ int grpc_cq_event_timeout_trace;
     gpr_free(_ev);                                                    \
   }
 
-
 static void on_pollset_shutdown_done(grpc_exec_ctx *exec_ctx, void *cc,
                                      bool success);
 

From 4412c85a1079f2ac55a9a27641076ca34c1a2c62 Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@google.com>
Date: Thu, 16 Jun 2016 10:37:51 -0700
Subject: [PATCH 079/280] crud removal

---
 examples/objective-c/route_guide/ViewControllers.m | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/objective-c/route_guide/ViewControllers.m b/examples/objective-c/route_guide/ViewControllers.m
index 1e84c334728..5fd411e3ba6 100644
--- a/examples/objective-c/route_guide/ViewControllers.m
+++ b/examples/objective-c/route_guide/ViewControllers.m
@@ -37,7 +37,7 @@
 #import <RxLibrary/GRXWriter+Immediate.h>
 #import <RxLibrary/GRXWriter+Transformations.h>
 
-static NSString * const kHostAddress = @"192.168.1.120:50051";
+static NSString * const kHostAddress = @"localhost:50051";
 
 /** Category to override RTGPoint's description. */
 @interface RTGPoint (Description)

From 00f41c1eed57f84a2efdfbd96a59dd00d523cde0 Mon Sep 17 00:00:00 2001
From: murgatroid99 <mlumish@google.com>
Date: Thu, 16 Jun 2016 12:46:52 -0700
Subject: [PATCH 080/280] Add comment about new trace flags

---
 src/core/lib/surface/completion_queue.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/core/lib/surface/completion_queue.h b/src/core/lib/surface/completion_queue.h
index 108445b28f1..e4018695e27 100644
--- a/src/core/lib/surface/completion_queue.h
+++ b/src/core/lib/surface/completion_queue.h
@@ -39,6 +39,8 @@
 #include <grpc/grpc.h>
 #include "src/core/lib/iomgr/pollset.h"
 
+/* These trace flags default to 1. The corresponding lines are only traced
+   if grpc_api_trace is also truthy */
 extern int grpc_cq_pluck_trace;
 extern int grpc_cq_event_timeout_trace;
 

From 474a574ba7ebd425d140c31b264c39b8e48d303d Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Wed, 15 Jun 2016 16:17:56 -0700
Subject: [PATCH 081/280] update readme.md

---
 src/csharp/README.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/csharp/README.md b/src/csharp/README.md
index 201c5ab0b56..acfb5ec6ddb 100644
--- a/src/csharp/README.md
+++ b/src/csharp/README.md
@@ -100,6 +100,12 @@ different languages.
 tools/run_tests/run_tests.py -l csharp
 ```
 
+ON .NET CORE SUPPORT
+------------------
+
+We are committed to providing full support for [.NET Core](https://dotnet.github.io/) in near future,
+but currently, the support is for .NET Core is experimental/work-in-progress.
+
 DOCUMENTATION
 -------------
 - the gRPC C# reference documentation is available online at [grpc.io][]

From 34f1b555aef416917a38cdbbb4191d388c6a4c83 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Thu, 16 Jun 2016 16:51:20 -0700
Subject: [PATCH 082/280] better test_case flag help formating

---
 test/cpp/interop/client.cc | 96 ++++++++++++++++++--------------------
 1 file changed, 46 insertions(+), 50 deletions(-)

diff --git a/test/cpp/interop/client.cc b/test/cpp/interop/client.cc
index c7d081100e2..e8ae6ee5723 100644
--- a/test/cpp/interop/client.cc
+++ b/test/cpp/interop/client.cc
@@ -54,34 +54,31 @@ DEFINE_string(server_host, "127.0.0.1", "Server host to connect to");
 DEFINE_string(server_host_override, "foo.test.google.fr",
               "Override the server host which is sent in HTTP header");
 DEFINE_string(test_case, "large_unary",
-              "Configure different test cases. Valid options are: "
-              "empty_unary : empty (zero bytes) request and response; "
-              "large_unary : single request and (large) response; "
-
-              "client_compressed_unary : single compressed request; "
-              "server_compressed_unary : single compressed response; "
-
-              "client_streaming : request streaming with single response; "
-              "server_streaming : single request with response streaming; "
+              "Configure different test cases. Valid options are:\n\n"
+              "all : all test cases;\n"
+              "cancel_after_begin : cancel stream after starting it;\n"
+              "cancel_after_first_response: cancel on first response;\n"
               "client_compressed_streaming : compressed request streaming with "
-              "single response; "
+              "client_compressed_unary : single compressed request;\n"
+              "client_streaming : request streaming with single response;\n"
+              "compute_engine_creds: large_unary with compute engine auth;\n"
+              "custom_metadata: server will echo custom metadata;\n"
+              "empty_stream : bi-di stream with no request/response;\n"
+              "empty_unary : empty (zero bytes) request and response;\n"
+              "half_duplex : half-duplex streaming;\n"
+              "jwt_token_creds: large_unary with JWT token auth;\n"
+              "large_unary : single request and (large) response;\n"
+              "oauth2_auth_token: raw oauth2 access token auth;\n"
+              "per_rpc_creds: raw oauth2 access token on a single rpc;\n"
+              "ping_pong : full-duplex streaming;\n"
+              "response streaming;\n"
               "server_compressed_streaming : single request with compressed "
-              "response streaming; "
-              "slow_consumer : single request with response; "
-              " streaming with slow client consumer; "
-              "half_duplex : half-duplex streaming; "
-              "ping_pong : full-duplex streaming; "
-              "cancel_after_begin : cancel stream after starting it; "
-              "cancel_after_first_response: cancel on first response; "
-              "timeout_on_sleeping_server: deadline exceeds on stream; "
-              "empty_stream : bi-di stream with no request/response; "
-              "compute_engine_creds: large_unary with compute engine auth; "
-              "jwt_token_creds: large_unary with JWT token auth; "
-              "oauth2_auth_token: raw oauth2 access token auth; "
-              "per_rpc_creds: raw oauth2 access token on a single rpc; "
-              "status_code_and_message: verify status code & message; "
-              "custom_metadata: server will echo custom metadata;"
-              "all : all of above.");
+              "server_compressed_unary : single compressed response;\n"
+              "server_streaming : single request with response streaming;\n"
+              "slow_consumer : single request with response streaming with "
+              "slow client consumer;\n"
+              "status_code_and_message: verify status code & message;\n"
+              "timeout_on_sleeping_server: deadline exceeds on stream;\n");
 DEFINE_string(default_service_account, "",
               "Email of GCE default service account");
 DEFINE_string(service_account_key_file, "",
@@ -178,30 +175,29 @@ int main(int argc, char** argv) {
     }
     // compute_engine_creds only runs in GCE.
   } else {
-    const char* testcases[] =
-    { "all",
-      "cancel_after_begin",
-      "cancel_after_first_response",
-      "client_compressed_streaming",
-      "client_compressed_unary",
-      "client_streaming",
-      "compute_engine_creds",
-      "custom_metadata",
-      "empty_stream",
-      "empty_unary",
-      "half_duplex",
-      "jwt_token_creds",
-      "large_unary",
-      "oauth2_auth_token",
-      "oauth2_auth_token",
-      "per_rpc_creds",
-      "per_rpc_creds",
-      "ping_pong",
-      "server_compressed_streaming",
-      "server_compressed_unary",
-      "server_streaming",
-      "status_code_and_message",
-      "timeout_on_sleeping_server"};
+    const char* testcases[] = {"all",
+                               "cancel_after_begin",
+                               "cancel_after_first_response",
+                               "client_compressed_streaming",
+                               "client_compressed_unary",
+                               "client_streaming",
+                               "compute_engine_creds",
+                               "custom_metadata",
+                               "empty_stream",
+                               "empty_unary",
+                               "half_duplex",
+                               "jwt_token_creds",
+                               "large_unary",
+                               "oauth2_auth_token",
+                               "oauth2_auth_token",
+                               "per_rpc_creds",
+                               "per_rpc_creds",
+                               "ping_pong",
+                               "server_compressed_streaming",
+                               "server_compressed_unary",
+                               "server_streaming",
+                               "status_code_and_message",
+                               "timeout_on_sleeping_server"};
     char* joined_testcases =
         gpr_strjoin_sep(testcases, GPR_ARRAY_SIZE(testcases), "\n", NULL);
 

From 560875239e4ce883b9c02d0bf003ce07d430154b Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Thu, 16 Jun 2016 16:52:11 -0700
Subject: [PATCH 083/280] c++ client & server changes to bring code up to spec

---
 test/cpp/interop/interop_client.cc | 337 ++++++++++++++++-------------
 test/cpp/interop/interop_server.cc |  86 ++++----
 2 files changed, 227 insertions(+), 196 deletions(-)

diff --git a/test/cpp/interop/interop_client.cc b/test/cpp/interop/interop_client.cc
index e5d37514028..509e8b97aba 100644
--- a/test/cpp/interop/interop_client.cc
+++ b/test/cpp/interop/interop_client.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -68,12 +68,12 @@ const int kLargeResponseSize = 314159;
 void NoopChecks(const InteropClientContextInspector& inspector,
                 const SimpleRequest* request, const SimpleResponse* response) {}
 
-void CompressionChecks(const InteropClientContextInspector& inspector,
-                       const SimpleRequest* request,
-                       const SimpleResponse* response) {
+void UnaryCompressionChecks(const InteropClientContextInspector& inspector,
+                            const SimpleRequest* request,
+                            const SimpleResponse* response) {
   const grpc_compression_algorithm received_compression =
       inspector.GetCallCompressionAlgorithm();
-  if (request->request_compressed_response()) {
+  if (request->response_compressed().value()) {
     if (received_compression == GRPC_COMPRESS_NONE) {
       // Requested some compression, got NONE. This is an error.
       gpr_log(GPR_ERROR,
@@ -81,11 +81,7 @@ void CompressionChecks(const InteropClientContextInspector& inspector,
               "from server.");
       abort();
     }
-    if (request->response_type() == PayloadType::COMPRESSABLE) {
-      // requested compression and compressable response => results should
-      // always be compressed.
-      GPR_ASSERT(inspector.GetMessageFlags() & GRPC_WRITE_INTERNAL_COMPRESS);
-    }
+    GPR_ASSERT(inspector.GetMessageFlags() & GRPC_WRITE_INTERNAL_COMPRESS);
   } else {
     // Didn't request compression -> make sure the response is uncompressed
     GPR_ASSERT(!(inspector.GetMessageFlags() & GRPC_WRITE_INTERNAL_COMPRESS));
@@ -190,11 +186,16 @@ bool InteropClient::PerformLargeUnary(SimpleRequest* request,
                                       CheckerFn custom_checks_fn) {
   ClientContext context;
   InteropClientContextInspector inspector(context);
-  // If the request doesn't already specify the response type, default to
-  // COMPRESSABLE.
   request->set_response_size(kLargeResponseSize);
   grpc::string payload(kLargeRequestSize, '\0');
   request->mutable_payload()->set_body(payload.c_str(), kLargeRequestSize);
+  if (request->has_expect_compressed()) {
+    if (request->expect_compressed().value()) {
+      context.set_compression_algorithm(GRPC_COMPRESS_GZIP);
+    } else {
+      context.set_compression_algorithm(GRPC_COMPRESS_NONE);
+    }
+  }
 
   Status s = serviceStub_.Get()->UnaryCall(&context, *request, response);
   if (!AssertStatusOk(s)) {
@@ -204,16 +205,8 @@ bool InteropClient::PerformLargeUnary(SimpleRequest* request,
   custom_checks_fn(inspector, request, response);
 
   // Payload related checks.
-  GPR_ASSERT(response->payload().type() == request->response_type());
-  switch (response->payload().type()) {
-    case PayloadType::COMPRESSABLE:
-      GPR_ASSERT(response->payload().body() ==
-                 grpc::string(kLargeResponseSize, '\0'));
-      break;
-    default:
-      GPR_ASSERT(false);
-  }
-
+  GPR_ASSERT(response->payload().body() ==
+             grpc::string(kLargeResponseSize, '\0'));
   return true;
 }
 
@@ -226,7 +219,6 @@ bool InteropClient::DoComputeEngineCreds(
   SimpleResponse response;
   request.set_fill_username(true);
   request.set_fill_oauth_scope(true);
-  request.set_response_type(PayloadType::COMPRESSABLE);
 
   if (!PerformLargeUnary(&request, &response)) {
     return false;
@@ -300,7 +292,6 @@ bool InteropClient::DoJwtTokenCreds(const grpc::string& username) {
   SimpleRequest request;
   SimpleResponse response;
   request.set_fill_username(true);
-  request.set_response_type(PayloadType::COMPRESSABLE);
 
   if (!PerformLargeUnary(&request, &response)) {
     return false;
@@ -316,7 +307,6 @@ bool InteropClient::DoLargeUnary() {
   gpr_log(GPR_DEBUG, "Sending a large unary rpc...");
   SimpleRequest request;
   SimpleResponse response;
-  request.set_response_type(PayloadType::COMPRESSABLE);
   if (!PerformLargeUnary(&request, &response)) {
     return false;
   }
@@ -325,62 +315,72 @@ bool InteropClient::DoLargeUnary() {
 }
 
 bool InteropClient::DoClientCompressedUnary() {
-  const bool expect_compression[] = {false, true};
-  const PayloadType payload_types[] = {COMPRESSABLE};
-  for (size_t i = 0; i < GPR_ARRAY_SIZE(payload_types); i++) {
-    for (size_t j = 0; j < GPR_ARRAY_SIZE(expect_compression); j++) {
-      char* log_suffix;
-      gpr_asprintf(&log_suffix, "(compression=%s; payload=%s)",
-                   expect_compression[j] ? "true" : "false",
-                   PayloadType_Name(payload_types[i]).c_str());
-
-      gpr_log(GPR_DEBUG, "Sending compressed unary request %s.", log_suffix);
-      SimpleRequest request;
-      SimpleResponse response;
-      request.set_response_type(payload_types[i]);
-      request.set_expect_compressed_request(expect_compression[j]);
-
-      if (!PerformLargeUnary(&request, &response, CompressionChecks)) {
-        gpr_log(GPR_ERROR, "Compressed unary request failed %s", log_suffix);
-        gpr_free(log_suffix);
-        return false;
-      }
-
-      gpr_log(GPR_DEBUG, "Compressed unary request failed %s", log_suffix);
+  // Probing for compression-checks support.
+  ClientContext probe_context;
+  SimpleRequest probe_req;
+  SimpleResponse probe_res;
+
+  probe_context.set_compression_algorithm(GRPC_COMPRESS_NONE);
+  probe_req.mutable_expect_compressed()->set_value(true);  // lies!
+
+  probe_req.set_response_size(kLargeResponseSize);
+  probe_req.mutable_payload()->set_body(grpc::string(kLargeRequestSize, '\0'));
+
+  gpr_log(GPR_DEBUG, "Sending probe for compressed unary request.");
+  const Status s =
+      serviceStub_.Get()->UnaryCall(&probe_context, probe_req, &probe_res);
+  if (s.error_code() != grpc::StatusCode::INVALID_ARGUMENT) {
+    // The server isn't able to evaluate incoming compression, making the rest
+    // of this test moot.
+    gpr_log(GPR_DEBUG, "Compressed unary request probe failed %s");
+    return false;
+  }
+  gpr_log(GPR_DEBUG, "Compressed unary request probe succeeded. Proceeding.");
+
+  const std::vector<bool> compressions = {true, false};
+  for (size_t i = 0; i < compressions.size(); i++) {
+    char* log_suffix;
+    gpr_asprintf(&log_suffix, "(compression=%s)",
+                 compressions[i] ? "true" : "false");
+
+    gpr_log(GPR_DEBUG, "Sending compressed unary request %s.", log_suffix);
+    SimpleRequest request;
+    SimpleResponse response;
+    request.mutable_expect_compressed()->set_value(compressions[i]);
+    if (!PerformLargeUnary(&request, &response, UnaryCompressionChecks)) {
+      gpr_log(GPR_ERROR, "Compressed unary request failed %s", log_suffix);
       gpr_free(log_suffix);
+      return false;
     }
+
+    gpr_log(GPR_DEBUG, "Compressed unary request failed %s", log_suffix);
+    gpr_free(log_suffix);
   }
 
   return true;
 }
 
 bool InteropClient::DoServerCompressedUnary() {
-  const bool request_compression[] = {false, true};
-  const PayloadType payload_types[] = {COMPRESSABLE};
-  for (size_t i = 0; i < GPR_ARRAY_SIZE(payload_types); i++) {
-    for (size_t j = 0; j < GPR_ARRAY_SIZE(request_compression); j++) {
-      char* log_suffix;
-      gpr_asprintf(&log_suffix, "(compression=%s; payload=%s)",
-                   request_compression[j] ? "true" : "false",
-                   PayloadType_Name(payload_types[i]).c_str());
-
-      gpr_log(GPR_DEBUG, "Sending unary request for compressed response %s.",
-              log_suffix);
-      SimpleRequest request;
-      SimpleResponse response;
-      request.set_response_type(payload_types[i]);
-      request.set_request_compressed_response(request_compression[j]);
-
-      if (!PerformLargeUnary(&request, &response, CompressionChecks)) {
-        gpr_log(GPR_ERROR, "Request for compressed unary failed %s",
-                log_suffix);
-        gpr_free(log_suffix);
-        return false;
-      }
-
-      gpr_log(GPR_DEBUG, "Request for compressed unary failed %s", log_suffix);
+  const std::vector<bool> compressions = {true, false};
+  for (size_t i = 0; i < compressions.size(); i++) {
+    char* log_suffix;
+    gpr_asprintf(&log_suffix, "(compression=%s)",
+                 compressions[i] ? "true" : "false");
+
+    gpr_log(GPR_DEBUG, "Sending unary request for compressed response %s.",
+            log_suffix);
+    SimpleRequest request;
+    SimpleResponse response;
+    request.mutable_response_compressed()->set_value(compressions[i]);
+
+    if (!PerformLargeUnary(&request, &response, UnaryCompressionChecks)) {
+      gpr_log(GPR_ERROR, "Request for compressed unary failed %s", log_suffix);
       gpr_free(log_suffix);
+      return false;
     }
+
+    gpr_log(GPR_DEBUG, "Request for compressed unary failed %s", log_suffix);
+    gpr_free(log_suffix);
   }
 
   return true;
@@ -407,7 +407,7 @@ bool InteropClient::DoRequestStreaming() {
       serviceStub_.Get()->StreamingInputCall(&context, &response));
 
   int aggregated_payload_size = 0;
-  for (unsigned int i = 0; i < request_stream_sizes.size(); ++i) {
+  for (size_t i = 0; i < request_stream_sizes.size(); ++i) {
     Payload* payload = request.mutable_payload();
     payload->set_body(grpc::string(request_stream_sizes[i], '\0'));
     if (!stream->Write(request)) {
@@ -416,7 +416,7 @@ bool InteropClient::DoRequestStreaming() {
     }
     aggregated_payload_size += request_stream_sizes[i];
   }
-  stream->WritesDone();
+  GPR_ASSERT(stream->WritesDone());
 
   Status s = stream->Finish();
   if (!AssertStatusOk(s)) {
@@ -467,94 +467,128 @@ bool InteropClient::DoResponseStreaming() {
 }
 
 bool InteropClient::DoClientCompressedStreaming() {
-  // XXX
-  return false;
+  // Probing for compression-checks support.
+  ClientContext probe_context;
+  StreamingInputCallRequest probe_req;
+  StreamingInputCallResponse probe_res;
+
+  probe_context.set_compression_algorithm(GRPC_COMPRESS_NONE);
+  probe_req.mutable_expect_compressed()->set_value(true);  // lies!
+  probe_req.mutable_payload()->set_body(grpc::string(27182, '\0'));
+
+  gpr_log(GPR_DEBUG, "Sending probe for compressed streaming request.");
+
+  std::unique_ptr<ClientWriter<StreamingInputCallRequest>> probe_stream(
+      serviceStub_.Get()->StreamingInputCall(&probe_context, &probe_res));
+
+  if (!probe_stream->Write(probe_req)) {
+    gpr_log(GPR_ERROR, "%s(): stream->Write() failed", __func__);
+    return TransientFailureOrAbort();
+  }
+  Status s = probe_stream->Finish();
+  if (s.error_code() != grpc::StatusCode::INVALID_ARGUMENT) {
+    // The server isn't able to evaluate incoming compression, making the rest
+    // of this test moot.
+    gpr_log(GPR_DEBUG, "Compressed streaming request probe failed %s");
+    return false;
+  }
+  gpr_log(GPR_DEBUG,
+          "Compressed streaming request probe succeeded. Proceeding.");
+
+  ClientContext context;
+  StreamingInputCallRequest request;
+  StreamingInputCallResponse response;
+
+  context.set_compression_algorithm(GRPC_COMPRESS_GZIP);
+  std::unique_ptr<ClientWriter<StreamingInputCallRequest>> stream(
+      serviceStub_.Get()->StreamingInputCall(&context, &response));
+
+  request.mutable_payload()->set_body(grpc::string(27182, '\0'));
+  request.mutable_expect_compressed()->set_value(true);
+  gpr_log(GPR_DEBUG, "Sending streaming request with compression enabled");
+  if (!stream->Write(request)) {
+    gpr_log(GPR_ERROR, "%s(): stream->Write() failed", __func__);
+    return TransientFailureOrAbort();
+  }
+
+  WriteOptions wopts;
+  wopts.set_no_compression();
+  request.mutable_payload()->set_body(grpc::string(45904, '\0'));
+  request.mutable_expect_compressed()->set_value(false);
+  gpr_log(GPR_DEBUG, "Sending streaming request with compression disabled");
+  if (!stream->Write(request, wopts)) {
+    gpr_log(GPR_ERROR, "%s(): stream->Write() failed", __func__);
+    return TransientFailureOrAbort();
+  }
+  GPR_ASSERT(stream->WritesDone());
+
+  s = stream->Finish();
+  if (!AssertStatusOk(s)) {
+    return false;
+  }
+
+  return true;
 }
 
 bool InteropClient::DoServerCompressedStreaming() {
-  const bool request_compression[] = {false, true};
-  const PayloadType payload_types[] = {COMPRESSABLE};
-  const std::vector<int> response_stream_sizes = {31415, 58979};
+  const std::vector<bool> compressions = {true, false};
+  const std::vector<int> sizes = {31415, 92653};
 
-  for (size_t i = 0; i < GPR_ARRAY_SIZE(payload_types); i++) {
-    for (size_t j = 0; j < GPR_ARRAY_SIZE(request_compression); j++) {
-      ClientContext context;
-      InteropClientContextInspector inspector(context);
-      StreamingOutputCallRequest request;
+  ClientContext context;
+  InteropClientContextInspector inspector(context);
+  StreamingOutputCallRequest request;
 
+  for (size_t i = 0; i < compressions.size(); i++) {
+    for (size_t j = 0; j < sizes.size(); j++) {
       char* log_suffix;
-      gpr_asprintf(&log_suffix, "(compression=%s; payload=%s)",
-                   request_compression[j] ? "true" : "false",
-                   PayloadType_Name(payload_types[i]).c_str());
-
-      gpr_log(GPR_DEBUG, "Receiving response streaming rpc %s.", log_suffix);
-
-      request.set_response_type(payload_types[i]);
-      request.set_request_compressed_response(request_compression[j]);
-
-      for (size_t k = 0; k < response_stream_sizes.size(); ++k) {
-        ResponseParameters* response_parameter =
-            request.add_response_parameters();
-        response_parameter->set_size(response_stream_sizes[k]);
-      }
-      StreamingOutputCallResponse response;
-
-      std::unique_ptr<ClientReader<StreamingOutputCallResponse>> stream(
-          serviceStub_.Get()->StreamingOutputCall(&context, request));
-
-      size_t k = 0;
-      while (stream->Read(&response)) {
-        // Payload related checks.
-        GPR_ASSERT(response.payload().type() == request.response_type());
-        switch (response.payload().type()) {
-          case PayloadType::COMPRESSABLE:
-            GPR_ASSERT(response.payload().body() ==
-                       grpc::string(response_stream_sizes[k], '\0'));
-            break;
-          default:
-            GPR_ASSERT(false);
-        }
-
-        // Compression related checks.
-        if (request.request_compressed_response()) {
-          GPR_ASSERT(inspector.GetCallCompressionAlgorithm() >
-                     GRPC_COMPRESS_NONE);
-          if (request.response_type() == PayloadType::COMPRESSABLE) {
-            // requested compression and compressable response => results should
-            // always be compressed.
-            GPR_ASSERT(inspector.GetMessageFlags() &
-                       GRPC_WRITE_INTERNAL_COMPRESS);
-          }
-        } else {
-          // requested *no* compression.
-          GPR_ASSERT(
-              !(inspector.GetMessageFlags() & GRPC_WRITE_INTERNAL_COMPRESS));
-        }
-
-        ++k;
-      }
-
-      gpr_log(GPR_DEBUG, "Response streaming done %s.", log_suffix);
+      gpr_asprintf(&log_suffix, "(compression=%s; size=%d)",
+                   compressions[i] ? "true" : "false", sizes[j]);
+
+      gpr_log(GPR_DEBUG, "Sending request streaming rpc %s.", log_suffix);
       gpr_free(log_suffix);
 
-      if (k < response_stream_sizes.size()) {
-        // stream->Read() failed before reading all the expected messages. This
-        // is most likely due to a connection failure.
-        gpr_log(GPR_ERROR,
-                "DoServerCompressedStreaming(): Responses read (k=%d) is "
-                "less than the expected messages (i.e "
-                "response_stream_sizes.size()/2 (%d)). (i=%d, j=%d)",
-                k, response_stream_sizes.size(), i, j);
-        return TransientFailureOrAbort();
-      }
-
-      Status s = stream->Finish();
-      if (!AssertStatusOk(s)) {
-        return false;
-      }
+      ResponseParameters* const response_parameter =
+          request.add_response_parameters();
+      response_parameter->mutable_compressed()->set_value(compressions[i]);
+      response_parameter->set_size(sizes[j]);
     }
   }
+  std::unique_ptr<ClientReader<StreamingOutputCallResponse>> stream(
+      serviceStub_.Get()->StreamingOutputCall(&context, request));
+
+  size_t k = 0;
+  StreamingOutputCallResponse response;
+  while (stream->Read(&response)) {
+    // Payload size checks.
+    GPR_ASSERT(response.payload().body() ==
+               grpc::string(request.response_parameters(k).size(), '\0'));
+
+    // Compression checks.
+    GPR_ASSERT(request.response_parameters(k).has_compressed());
+    if (request.response_parameters(k).compressed().value()) {
+      GPR_ASSERT(inspector.GetCallCompressionAlgorithm() > GRPC_COMPRESS_NONE);
+      GPR_ASSERT(inspector.GetMessageFlags() & GRPC_WRITE_INTERNAL_COMPRESS);
+    } else {
+      // requested *no* compression.
+      GPR_ASSERT(!(inspector.GetMessageFlags() & GRPC_WRITE_INTERNAL_COMPRESS));
+    }
+    ++k;
+  }
+
+  if (k < response_stream_sizes.size()) {
+    // stream->Read() failed before reading all the expected messages. This
+    // is most likely due to a connection failure.
+    gpr_log(GPR_ERROR,
+            "%s(): Responses read (k=%d) is "
+            "less than the expected number of messages (%d)).",
+            __func__, k, response_stream_sizes.size());
+    return TransientFailureOrAbort();
+  }
 
+  Status s = stream->Finish();
+  if (!AssertStatusOk(s)) {
+    return false;
+  }
   return true;
 }
 
@@ -655,7 +689,6 @@ bool InteropClient::DoPingPong() {
       stream(serviceStub_.Get()->FullDuplexCall(&context));
 
   StreamingOutputCallRequest request;
-  request.set_response_type(PayloadType::COMPRESSABLE);
   ResponseParameters* response_parameter = request.add_response_parameters();
   Payload* payload = request.mutable_payload();
   StreamingOutputCallResponse response;
@@ -722,7 +755,6 @@ bool InteropClient::DoCancelAfterFirstResponse() {
       stream(serviceStub_.Get()->FullDuplexCall(&context));
 
   StreamingOutputCallRequest request;
-  request.set_response_type(PayloadType::COMPRESSABLE);
   ResponseParameters* response_parameter = request.add_response_parameters();
   response_parameter->set_size(31415);
   request.mutable_payload()->set_body(grpc::string(27182, '\0'));
@@ -862,7 +894,6 @@ bool InteropClient::DoCustomMetadata() {
         stream(serviceStub_.Get()->FullDuplexCall(&context));
 
     StreamingOutputCallRequest request;
-    request.set_response_type(PayloadType::COMPRESSABLE);
     ResponseParameters* response_parameter = request.add_response_parameters();
     response_parameter->set_size(kLargeResponseSize);
     grpc::string payload(kLargeRequestSize, '\0');
diff --git a/test/cpp/interop/interop_server.cc b/test/cpp/interop/interop_server.cc
index b328f478fa0..8c5c0e24e19 100644
--- a/test/cpp/interop/interop_server.cc
+++ b/test/cpp/interop/interop_server.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -65,10 +65,10 @@ using grpc::ServerCredentials;
 using grpc::ServerReader;
 using grpc::ServerReaderWriter;
 using grpc::ServerWriter;
+using grpc::WriteOptions;
 using grpc::SslServerCredentialsOptions;
 using grpc::testing::InteropServerContextInspector;
 using grpc::testing::Payload;
-using grpc::testing::PayloadType;
 using grpc::testing::SimpleRequest;
 using grpc::testing::SimpleResponse;
 using grpc::testing::StreamingInputCallRequest;
@@ -110,50 +110,30 @@ void MaybeEchoMetadata(ServerContext* context) {
   }
 }
 
-bool SetPayload(PayloadType response_type, int size, Payload* payload) {
-  payload->set_type(response_type);
-  switch (response_type) {
-    case PayloadType::COMPRESSABLE: {
-      std::unique_ptr<char[]> body(new char[size]());
-      payload->set_body(body.get(), size);
-    } break;
-    default:
-      return false;
-  }
+bool SetPayload(int size, Payload* payload) {
+  std::unique_ptr<char[]> body(new char[size]());
+  payload->set_body(body.get(), size);
   return true;
 }
 
-template <typename RequestType>
-void SetResponseCompression(ServerContext* context,
-                            const RequestType& request) {
-  if (request.request_compressed_response()) {
-    // Any level would do, let's go for HIGH because we are overachievers.
-    context->set_compression_level(GRPC_COMPRESS_LEVEL_HIGH);
-  }
-}
-
-template <typename RequestType>
 bool CheckExpectedCompression(const ServerContext& context,
-                              const RequestType& request) {
+                              const bool compression_expected) {
   const InteropServerContextInspector inspector(context);
   const grpc_compression_algorithm received_compression =
       inspector.GetCallCompressionAlgorithm();
 
-  if (request.expect_compressed_request()) {
+  if (compression_expected) {
     if (received_compression == GRPC_COMPRESS_NONE) {
       // Expected some compression, got NONE. This is an error.
       gpr_log(GPR_ERROR,
-              "Failure: Expected compression but got uncompressed request "
-              "from client.");
+              "Expected compression but got uncompressed request from client.");
       return false;
     }
-    if (request.payload_type() == PayloadType::COMPRESSABLE) {
-      if (!(inspector.GetMessageFlags() & GRPC_WRITE_INTERNAL_COMPRESS)) {
-        gpr_log(GPR_ERROR,
-                "Failure: Requested compression in a compressable request, but "
-                "compression bit in message flags not set.");
-        return false;
-      }
+    if (!(inspector.GetMessageFlags() & GRPC_WRITE_INTERNAL_COMPRESS)) {
+      gpr_log(GPR_ERROR,
+              "Failure: Requested compression in a compressable request, but "
+              "compression bit in message flags not set.");
+      return false;
     }
   } else {
     // Didn't expect compression -> make sure the request is uncompressed
@@ -178,14 +158,24 @@ class TestServiceImpl : public TestService::Service {
   Status UnaryCall(ServerContext* context, const SimpleRequest* request,
                    SimpleResponse* response) {
     MaybeEchoMetadata(context);
-    SetResponseCompression(context, *request);
-    if (!CheckExpectedCompression(*context, *request)) {
+    if (request->has_response_compressed()) {
+      const bool compression_requested = request->response_compressed().value();
+      gpr_log(GPR_DEBUG, "Request for compression (%s) present for %s",
+              compression_requested ? "enabled" : "disabled", __func__);
+      if (compression_requested) {
+        // Any level would do, let's go for HIGH because we are overachievers.
+        context->set_compression_level(GRPC_COMPRESS_LEVEL_HIGH);
+      } else {
+        context->set_compression_level(GRPC_COMPRESS_LEVEL_NONE);
+      }
+    }
+    if (!CheckExpectedCompression(*context,
+                                  request->expect_compressed().value())) {
       return Status(grpc::StatusCode::INVALID_ARGUMENT,
                     "Compressed request expectation not met.");
     }
     if (request->response_size() > 0) {
-      if (!SetPayload(request->response_type(), request->response_size(),
-                      response->mutable_payload())) {
+      if (!SetPayload(request->response_size(), response->mutable_payload())) {
         return Status(grpc::StatusCode::INVALID_ARGUMENT,
                       "Error creating payload.");
       }
@@ -203,18 +193,28 @@ class TestServiceImpl : public TestService::Service {
   Status StreamingOutputCall(
       ServerContext* context, const StreamingOutputCallRequest* request,
       ServerWriter<StreamingOutputCallResponse>* writer) {
-    SetResponseCompression(context, *request);
     StreamingOutputCallResponse response;
+    // Compress by default. Disabled on a per-message basis.
+    context->set_compression_level(GRPC_COMPRESS_LEVEL_HIGH);
     bool write_success = true;
     for (int i = 0; write_success && i < request->response_parameters_size();
          i++) {
-      if (!SetPayload(request->response_type(),
-                      request->response_parameters(i).size(),
+      if (!SetPayload(request->response_parameters(i).size(),
                       response.mutable_payload())) {
         return Status(grpc::StatusCode::INVALID_ARGUMENT,
                       "Error creating payload.");
       }
-      write_success = writer->Write(response);
+      WriteOptions wopts;
+      if (request->response_parameters(i).has_compressed()) {
+        const bool compression_requested =
+            request->response_parameters(i).compressed().value();
+        gpr_log(GPR_DEBUG, "Request for compression (%s) present for %s",
+                compression_requested ? "enabled" : "disabled", __func__);
+        if (!compression_requested) {
+          wopts.set_no_compression();
+        }  // else, compression is already enabled via the context.
+      }
+      write_success = writer->Write(response, wopts);
     }
     if (write_success) {
       return Status::OK;
@@ -229,7 +229,8 @@ class TestServiceImpl : public TestService::Service {
     StreamingInputCallRequest request;
     int aggregated_payload_size = 0;
     while (reader->Read(&request)) {
-      if (!CheckExpectedCompression(*context, request)) {
+      if (!CheckExpectedCompression(*context,
+                                    request.expect_compressed().value())) {
         return Status(grpc::StatusCode::INVALID_ARGUMENT,
                       "Compressed request expectation not met.");
       }
@@ -250,7 +251,6 @@ class TestServiceImpl : public TestService::Service {
     StreamingOutputCallResponse response;
     bool write_success = true;
     while (write_success && stream->Read(&request)) {
-      SetResponseCompression(context, request);
       if (request.response_parameters_size() != 0) {
         response.mutable_payload()->set_type(request.payload().type());
         response.mutable_payload()->set_body(

From 317b8acf995ef3360df4c04ba180355e6b62e59c Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Thu, 16 Jun 2016 09:36:11 -0700
Subject: [PATCH 084/280] migrate everything to netstandard1.5

---
 src/csharp/Grpc.Auth/project.json             |  8 ++---
 .../Grpc.Core.Tests/AppDomainUnloadTest.cs    |  2 +-
 src/csharp/Grpc.Core.Tests/NUnitMain.cs       |  2 +-
 src/csharp/Grpc.Core.Tests/SanityTest.cs      |  3 +-
 src/csharp/Grpc.Core.Tests/project.json       | 15 ++++----
 src/csharp/Grpc.Core/GrpcEnvironment.cs       |  2 +-
 .../Grpc.Core/Internal/NativeExtension.cs     |  4 +--
 src/csharp/Grpc.Core/Internal/PlatformApis.cs |  2 +-
 src/csharp/Grpc.Core/project.json             | 17 ++--------
 .../Grpc.Examples.MathClient/project.json     | 15 ++++----
 .../Grpc.Examples.MathServer/project.json     | 15 ++++----
 src/csharp/Grpc.Examples.Tests/NUnitMain.cs   |  2 +-
 src/csharp/Grpc.Examples.Tests/project.json   | 15 ++++----
 src/csharp/Grpc.Examples/project.json         | 12 +++----
 .../Grpc.HealthCheck.Tests/NUnitMain.cs       |  2 +-
 .../Grpc.HealthCheck.Tests/project.json       | 15 ++++----
 src/csharp/Grpc.HealthCheck/project.json      |  4 +--
 .../project.json                              | 19 +++++++++--
 .../project.json                              | 19 +++++++++--
 .../project.json                              | 19 +++++++++--
 .../GeneratedClientTest.cs                    | 12 ++++---
 .../GeneratedServiceBaseTest.cs               |  1 -
 .../Grpc.IntegrationTesting/InteropClient.cs  | 32 ++++++++++++++---
 .../MetadataCredentialsTest.cs                | 21 +++++-------
 .../Grpc.IntegrationTesting/NUnitMain.cs      |  2 +-
 .../TestCredentials.cs                        |  2 +-
 .../Grpc.IntegrationTesting/project.json      | 34 +++++++++++++++++--
 27 files changed, 198 insertions(+), 98 deletions(-)

diff --git a/src/csharp/Grpc.Auth/project.json b/src/csharp/Grpc.Auth/project.json
index 25579982a9d..57539f2976b 100644
--- a/src/csharp/Grpc.Auth/project.json
+++ b/src/csharp/Grpc.Auth/project.json
@@ -18,14 +18,14 @@
   },
   "frameworks": {
     "net45": { },
-    "dotnet54": {
+    "netstandard1.5": {
       "imports": [
         "net45"
       ],
       "dependencies": {
-        "Microsoft.CSharp": "4.0.1-beta-23516",
-        "Microsoft.NETCore.Portable.Compatibility": "1.0.1-beta-23516",
-        "System.Threading.Tasks": "4.0.11-beta-23516"
+        "Microsoft.NETCore.Portable.Compatibility": "1.0.1-rc2-24027",
+        "NETStandard.Library": "1.5.0-rc2-24027",
+        "System.Threading.Tasks": "4.0.11-rc2-24027"
       }
     }
   }
diff --git a/src/csharp/Grpc.Core.Tests/AppDomainUnloadTest.cs b/src/csharp/Grpc.Core.Tests/AppDomainUnloadTest.cs
index d2c641cf2f8..064bc13cabb 100644
--- a/src/csharp/Grpc.Core.Tests/AppDomainUnloadTest.cs
+++ b/src/csharp/Grpc.Core.Tests/AppDomainUnloadTest.cs
@@ -40,7 +40,7 @@ namespace Grpc.Core.Tests
 {
     public class AppDomainUnloadTest
     {
-#if DOTNET5_4
+#if NETSTANDARD1_5
         [Test]
         [Ignore("Not supported for CoreCLR")]
         public void AppDomainUnloadHookCanCleanupAbandonedCall()
diff --git a/src/csharp/Grpc.Core.Tests/NUnitMain.cs b/src/csharp/Grpc.Core.Tests/NUnitMain.cs
index 9c1d7bf3c8a..24a9f846d10 100644
--- a/src/csharp/Grpc.Core.Tests/NUnitMain.cs
+++ b/src/csharp/Grpc.Core.Tests/NUnitMain.cs
@@ -49,7 +49,7 @@ namespace Grpc.Core.Tests
         {
             // Make logger immune to NUnit capturing stdout and stderr to workaround https://github.com/nunit/nunit/issues/1406.
             GrpcEnvironment.SetLogger(new TextWriterLogger(Console.Error));
-#if DOTNET5_4
+#if NETSTANDARD1_5
             return new AutoRun(typeof(NUnitMain).GetTypeInfo().Assembly).Execute(args, new ExtendedTextWrapper(Console.Out), Console.In);
 #else
             return new AutoRun().Execute(args);
diff --git a/src/csharp/Grpc.Core.Tests/SanityTest.cs b/src/csharp/Grpc.Core.Tests/SanityTest.cs
index 9e995d40c03..501992c5695 100644
--- a/src/csharp/Grpc.Core.Tests/SanityTest.cs
+++ b/src/csharp/Grpc.Core.Tests/SanityTest.cs
@@ -45,7 +45,8 @@ namespace Grpc.Core.Tests
 {
     public class SanityTest
     {
-#if !DOTNET5_4
+        // TODO: make sanity test work for CoreCLR as well
+#if !NETSTANDARD1_5
         /// <summary>
         /// Because we depend on a native library, sometimes when things go wrong, the
         /// entire NUnit test process crashes. To be able to track down problems better,
diff --git a/src/csharp/Grpc.Core.Tests/project.json b/src/csharp/Grpc.Core.Tests/project.json
index dc90e04ccfb..06718043142 100644
--- a/src/csharp/Grpc.Core.Tests/project.json
+++ b/src/csharp/Grpc.Core.Tests/project.json
@@ -10,23 +10,26 @@
     "emitEntryPoint": true
   },
   "dependencies": {
-    "Grpc.Core": "0.14.0-anexperiment",
+    "Grpc.Core": {
+      "version": "0.0.1",
+      "taget": "project"
+    },
     "Newtonsoft.Json": "8.0.3",
     "NUnit": "3.2.0",
     "NUnitLite": "3.2.0-*"
   },
   "frameworks": {
     "net45": { },
-    "dotnet54": {
+    "netstandard1.5": {
       "imports": [
         "portable-net45"
       ],
       "dependencies": {
-        "Microsoft.NETCore.App": {
-          "type": "platform",
-          "version": "1.0.0-rc2-23931"
-        }
+        "NETStandard.Library": "1.5.0-rc2-24027"
       }
     }
+  },
+  "runtimes": {
+    "win7-x64": { }
   }
 }
diff --git a/src/csharp/Grpc.Core/GrpcEnvironment.cs b/src/csharp/Grpc.Core/GrpcEnvironment.cs
index 37f9dce7c2f..f4642c91577 100644
--- a/src/csharp/Grpc.Core/GrpcEnvironment.cs
+++ b/src/csharp/Grpc.Core/GrpcEnvironment.cs
@@ -353,7 +353,7 @@ namespace Grpc.Core
                     if (!hooksRegistered)
                     {
                         // TODO(jtattermusch): register shutdownhooks for CoreCLR as well
-#if !DOTNET5_4
+#if !NETSTANDARD1_5
 
                         AppDomain.CurrentDomain.ProcessExit += ShutdownHookHandler;
                         AppDomain.CurrentDomain.DomainUnload += ShutdownHookHandler;
diff --git a/src/csharp/Grpc.Core/Internal/NativeExtension.cs b/src/csharp/Grpc.Core/Internal/NativeExtension.cs
index 6c219621df5..a6d79258162 100644
--- a/src/csharp/Grpc.Core/Internal/NativeExtension.cs
+++ b/src/csharp/Grpc.Core/Internal/NativeExtension.cs
@@ -117,7 +117,7 @@ namespace Grpc.Core.Internal
         private static string GetAssemblyPath()
         {
             var assembly = typeof(NativeExtension).GetTypeInfo().Assembly;
-#if DOTNET5_4
+#if NETSTANDARD1_5
             // Assembly.EscapedCodeBase does not exist under CoreCLR, but assemblies imported from a nuget package
             // don't seem to be shadowed by DNX-based projects at all.
             return assembly.Location;
@@ -136,7 +136,7 @@ namespace Grpc.Core.Internal
 #endif
         }
 
-#if !DOTNET5_4
+#if !NETSTANDARD1_5
         private static bool IsFileUri(string uri)
         {
             return uri.ToLowerInvariant().StartsWith(Uri.UriSchemeFile);
diff --git a/src/csharp/Grpc.Core/Internal/PlatformApis.cs b/src/csharp/Grpc.Core/Internal/PlatformApis.cs
index 3331a1f9fac..15391ddc647 100644
--- a/src/csharp/Grpc.Core/Internal/PlatformApis.cs
+++ b/src/csharp/Grpc.Core/Internal/PlatformApis.cs
@@ -53,7 +53,7 @@ namespace Grpc.Core.Internal
 
         static PlatformApis()
         {
-#if DOTNET5_4
+#if NETSTANDARD1_5
             isLinux = RuntimeInformation.IsOSPlatform(OSPlatform.Linux);
             isMacOSX = RuntimeInformation.IsOSPlatform(OSPlatform.OSX);
             isWindows = RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
diff --git a/src/csharp/Grpc.Core/project.json b/src/csharp/Grpc.Core/project.json
index a916bbd09ab..b5b7722bba2 100644
--- a/src/csharp/Grpc.Core/project.json
+++ b/src/csharp/Grpc.Core/project.json
@@ -30,24 +30,13 @@
   },
   "frameworks": {
     "net45": { },
-    "dotnet54": {
+    "netstandard1.5": {
       "imports": [
         "portable-net45"
       ],
       "dependencies": {
-        "Microsoft.CSharp": "4.0.1-beta-23516",
-        "System.Collections": "4.0.11-beta-23516",
-        "System.Collections.Concurrent": "4.0.11-beta-23516",
-        "System.Console": "4.0.0-beta-23516",
-        "System.Linq": "4.0.1-beta-23516",
-        "System.Threading": "4.0.11-beta-23516",
-        "System.Threading.Thread": "4.0.0-beta-23516",
-        "System.Reflection": "4.1.0-beta-23516",
-        "System.Text.Encoding": "4.0.11-beta-23516",
-        "System.Text.RegularExpressions": "4.0.11-beta-23516",
-        "System.IO": "4.0.11-beta-23516",
-        "System.IO.FileSystem": "4.0.1-beta-23516",
-        "System.Runtime.InteropServices.RuntimeInformation": "4.0.0-beta-23516"
+        "NETStandard.Library": "1.5.0-rc2-24027",
+        "System.Threading.Thread": "4.0.0-rc2-24027"
       }
     }
   }
diff --git a/src/csharp/Grpc.Examples.MathClient/project.json b/src/csharp/Grpc.Examples.MathClient/project.json
index 4abf8a5e34f..791cd1dcb80 100644
--- a/src/csharp/Grpc.Examples.MathClient/project.json
+++ b/src/csharp/Grpc.Examples.MathClient/project.json
@@ -10,20 +10,23 @@
     "emitEntryPoint": true
   },
   "dependencies": {
-    "Grpc.Examples": "1.0.0"
+    "Grpc.Examples": {
+      "version": "1.0.0",
+      "taget": "project"
+    }
   },
   "frameworks": {
     "net45": { },
-    "dotnet54": {
+    "netstandard1.5": {
       "imports": [
         "portable-net45"
       ],
       "dependencies": {
-        "Microsoft.NETCore.App": {
-          "type": "platform",
-          "version": "1.0.0-rc2-23931"
-        }
+        "NETStandard.Library": "1.5.0-rc2-24027"
       }
     }
+  },
+  "runtimes": {
+    "win7-x64": { }
   }
 }
diff --git a/src/csharp/Grpc.Examples.MathServer/project.json b/src/csharp/Grpc.Examples.MathServer/project.json
index 4abf8a5e34f..791cd1dcb80 100644
--- a/src/csharp/Grpc.Examples.MathServer/project.json
+++ b/src/csharp/Grpc.Examples.MathServer/project.json
@@ -10,20 +10,23 @@
     "emitEntryPoint": true
   },
   "dependencies": {
-    "Grpc.Examples": "1.0.0"
+    "Grpc.Examples": {
+      "version": "1.0.0",
+      "taget": "project"
+    }
   },
   "frameworks": {
     "net45": { },
-    "dotnet54": {
+    "netstandard1.5": {
       "imports": [
         "portable-net45"
       ],
       "dependencies": {
-        "Microsoft.NETCore.App": {
-          "type": "platform",
-          "version": "1.0.0-rc2-23931"
-        }
+        "NETStandard.Library": "1.5.0-rc2-24027"
       }
     }
+  },
+  "runtimes": {
+    "win7-x64": { }
   }
 }
diff --git a/src/csharp/Grpc.Examples.Tests/NUnitMain.cs b/src/csharp/Grpc.Examples.Tests/NUnitMain.cs
index ea87802766b..1a522cab932 100644
--- a/src/csharp/Grpc.Examples.Tests/NUnitMain.cs
+++ b/src/csharp/Grpc.Examples.Tests/NUnitMain.cs
@@ -49,7 +49,7 @@ namespace Grpc.Examples.Tests
         {
             // Make logger immune to NUnit capturing stdout and stderr to workaround https://github.com/nunit/nunit/issues/1406.
             GrpcEnvironment.SetLogger(new TextWriterLogger(Console.Error));
-#if DOTNET5_4
+#if NETSTANDARD1_5
             return new AutoRun(typeof(NUnitMain).GetTypeInfo().Assembly).Execute(args, new ExtendedTextWrapper(Console.Out), Console.In);
 #else
             return new AutoRun().Execute(args);
diff --git a/src/csharp/Grpc.Examples.Tests/project.json b/src/csharp/Grpc.Examples.Tests/project.json
index bd74812c153..6ef440e27dd 100644
--- a/src/csharp/Grpc.Examples.Tests/project.json
+++ b/src/csharp/Grpc.Examples.Tests/project.json
@@ -10,22 +10,25 @@
     "emitEntryPoint": true
   },
   "dependencies": {
-    "Grpc.Examples": "1.0.0",
+    "Grpc.Examples": {
+      "version": "1.0.0",
+      "taget": "project"
+    },
     "NUnit": "3.2.0",
     "NUnitLite": "3.2.0-*"
   },
   "frameworks": {
     "net45": { },
-    "dotnet54": {
+    "netstandard1.5": {
       "imports": [
         "portable-net45"
       ],
       "dependencies": {
-        "Microsoft.NETCore.App": {
-          "type": "platform",
-          "version": "1.0.0-rc2-23931"
-        }
+        "NETStandard.Library": "1.5.0-rc2-24027"
       }
     }
+  },
+  "runtimes": {
+    "win7-x64": { }
   }
 }
diff --git a/src/csharp/Grpc.Examples/project.json b/src/csharp/Grpc.Examples/project.json
index e2b4c10422f..4a3810596b0 100644
--- a/src/csharp/Grpc.Examples/project.json
+++ b/src/csharp/Grpc.Examples/project.json
@@ -4,7 +4,10 @@
   },
 
   "dependencies": {
-    "Grpc.Core": "0.0.1",
+    "Grpc.Core": {
+      "version": "0.0.1",
+      "taget": "project"
+    },
     "Google.Protobuf": "3.0.0-beta3"
   },
   "frameworks": {
@@ -14,15 +17,12 @@
         "System.IO": ""
       }
     },
-    "dotnet54": {
+    "netstandard1.5": {
       "imports": [
         "portable-net45"
       ],
       "dependencies": {
-        "Microsoft.NETCore.App": {
-          "type": "platform",
-          "version": "1.0.0-rc2-23931"
-        }
+        "NETStandard.Library": "1.5.0-rc2-24027"
       }
     }
   }
diff --git a/src/csharp/Grpc.HealthCheck.Tests/NUnitMain.cs b/src/csharp/Grpc.HealthCheck.Tests/NUnitMain.cs
index 0820523f35c..44634671ce5 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/NUnitMain.cs
+++ b/src/csharp/Grpc.HealthCheck.Tests/NUnitMain.cs
@@ -49,7 +49,7 @@ namespace Grpc.HealthCheck.Tests
         {
             // Make logger immune to NUnit capturing stdout and stderr to workaround https://github.com/nunit/nunit/issues/1406.
             GrpcEnvironment.SetLogger(new TextWriterLogger(Console.Error));
-#if DOTNET5_4
+#if NETSTANDARD1_5
             return new AutoRun(typeof(NUnitMain).GetTypeInfo().Assembly).Execute(args, new ExtendedTextWrapper(Console.Out), Console.In);
 #else
             return new AutoRun().Execute(args);
diff --git a/src/csharp/Grpc.HealthCheck.Tests/project.json b/src/csharp/Grpc.HealthCheck.Tests/project.json
index 248a1324f60..fde21f1b7e0 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/project.json
+++ b/src/csharp/Grpc.HealthCheck.Tests/project.json
@@ -10,22 +10,25 @@
     "emitEntryPoint": true
   },
   "dependencies": {
-    "Grpc.HealthCheck": "0.0.1",
+    "Grpc.HealthCheck": {
+      "version": "0.0.1",
+      "taget": "project"
+    },
     "NUnit": "3.2.0",
     "NUnitLite": "3.2.0-*"
   },
   "frameworks": {
     "net45": { },
-    "dotnet54": {
+    "netstandard1.5": {
       "imports": [
         "portable-net45"
       ],
       "dependencies": {
-        "Microsoft.NETCore.App": {
-          "type": "platform",
-          "version": "1.0.0-rc2-23931"
-        }
+        "NETStandard.Library": "1.5.0-rc2-24027"
       }
     }
+  },
+  "runtimes": {
+    "win7-x64": { }
   }
 }
diff --git a/src/csharp/Grpc.HealthCheck/project.json b/src/csharp/Grpc.HealthCheck/project.json
index ad42df595d4..c69db5f997d 100644
--- a/src/csharp/Grpc.HealthCheck/project.json
+++ b/src/csharp/Grpc.HealthCheck/project.json
@@ -26,12 +26,12 @@
         "System.IO": ""
       }
     },
-    "dotnet54": {
+    "netstandard1.5": {
       "imports": [
         "portable-net45"
       ],
       "dependencies": {
-        "Microsoft.CSharp": "4.0.1-beta-23516"
+        "NETStandard.Library": "1.5.0-rc2-24027"
       }
     }
   }
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/project.json b/src/csharp/Grpc.IntegrationTesting.Client/project.json
index 6ad74d59984..a5a87f9882d 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Client/project.json
@@ -10,9 +10,24 @@
     "emitEntryPoint": true
   },
   "dependencies": {
-    "Grpc.IntegrationTesting": "1.0.0"
+    "Grpc.IntegrationTesting": {
+      "version": "1.0.0",
+      "taget": "project"
+    }
   },
   "frameworks": {
-    "net45": { }
+    "net45": { },
+    "netstandard1.5": {
+      "imports": [
+        "portable-net45",
+        "net45"
+      ],
+      "dependencies": {
+        "NETStandard.Library": "1.5.0-rc2-24027"
+      }
+    }
+  },
+  "runtimes": {
+    "win7-x64": { }
   }
 }
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
index 6ad74d59984..a5a87f9882d 100644
--- a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
@@ -10,9 +10,24 @@
     "emitEntryPoint": true
   },
   "dependencies": {
-    "Grpc.IntegrationTesting": "1.0.0"
+    "Grpc.IntegrationTesting": {
+      "version": "1.0.0",
+      "taget": "project"
+    }
   },
   "frameworks": {
-    "net45": { }
+    "net45": { },
+    "netstandard1.5": {
+      "imports": [
+        "portable-net45",
+        "net45"
+      ],
+      "dependencies": {
+        "NETStandard.Library": "1.5.0-rc2-24027"
+      }
+    }
+  },
+  "runtimes": {
+    "win7-x64": { }
   }
 }
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/project.json b/src/csharp/Grpc.IntegrationTesting.Server/project.json
index 6ad74d59984..a5a87f9882d 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Server/project.json
@@ -10,9 +10,24 @@
     "emitEntryPoint": true
   },
   "dependencies": {
-    "Grpc.IntegrationTesting": "1.0.0"
+    "Grpc.IntegrationTesting": {
+      "version": "1.0.0",
+      "taget": "project"
+    }
   },
   "frameworks": {
-    "net45": { }
+    "net45": { },
+    "netstandard1.5": {
+      "imports": [
+        "portable-net45",
+        "net45"
+      ],
+      "dependencies": {
+        "NETStandard.Library": "1.5.0-rc2-24027"
+      }
+    }
+  },
+  "runtimes": {
+    "win7-x64": { }
   }
 }
diff --git a/src/csharp/Grpc.IntegrationTesting/GeneratedClientTest.cs b/src/csharp/Grpc.IntegrationTesting/GeneratedClientTest.cs
index 37786b6c30a..eb7b55a2863 100644
--- a/src/csharp/Grpc.IntegrationTesting/GeneratedClientTest.cs
+++ b/src/csharp/Grpc.IntegrationTesting/GeneratedClientTest.cs
@@ -40,7 +40,6 @@ using System.Threading.Tasks;
 using Grpc.Core;
 using Grpc.Core.Utils;
 using Grpc.Testing;
-using Moq;
 using NUnit.Framework;
 
 namespace Grpc.IntegrationTesting
@@ -49,14 +48,16 @@ namespace Grpc.IntegrationTesting
     {
         TestService.TestServiceClient unimplementedClient = new UnimplementedTestServiceClient();
 
+        // TODO: replace Moq by some mocking library with CoreCLR support.
+#if !NETSTANDARD1_5
         [Test]
         public void ExpandedParamOverloadCanBeMocked()
         {
             var expected = new SimpleResponse();
 
-            var mockClient = new Mock<TestService.TestServiceClient>();
+            var mockClient = new Moq.Mock<TestService.TestServiceClient>();
             // mocking is relatively clumsy because one needs to specify value for all the optional params.
-            mockClient.Setup(m => m.UnaryCall(It.IsAny<SimpleRequest>(), null, null, CancellationToken.None)).Returns(expected);
+            mockClient.Setup(m => m.UnaryCall(Moq.It.IsAny<SimpleRequest>(), null, null, CancellationToken.None)).Returns(expected);
 
             Assert.AreSame(expected, mockClient.Object.UnaryCall(new SimpleRequest()));
         }
@@ -66,11 +67,12 @@ namespace Grpc.IntegrationTesting
         {
             var expected = new SimpleResponse();
 
-            var mockClient = new Mock<TestService.TestServiceClient>();
-            mockClient.Setup(m => m.UnaryCall(It.IsAny<SimpleRequest>(), It.IsAny<CallOptions>())).Returns(expected);
+            var mockClient = new Moq.Mock<TestService.TestServiceClient>();
+            mockClient.Setup(m => m.UnaryCall(Moq.It.IsAny<SimpleRequest>(), Moq.It.IsAny<CallOptions>())).Returns(expected);
 
             Assert.AreSame(expected, mockClient.Object.UnaryCall(new SimpleRequest(), new CallOptions()));
         }
+#endif
 
         [Test]
         public void DefaultMethodStubThrows_UnaryCall()
diff --git a/src/csharp/Grpc.IntegrationTesting/GeneratedServiceBaseTest.cs b/src/csharp/Grpc.IntegrationTesting/GeneratedServiceBaseTest.cs
index 5fd0e14e78d..001533ce315 100644
--- a/src/csharp/Grpc.IntegrationTesting/GeneratedServiceBaseTest.cs
+++ b/src/csharp/Grpc.IntegrationTesting/GeneratedServiceBaseTest.cs
@@ -40,7 +40,6 @@ using System.Threading.Tasks;
 using Grpc.Core;
 using Grpc.Core.Utils;
 using Grpc.Testing;
-using Moq;
 using NUnit.Framework;
 
 namespace Grpc.IntegrationTesting
diff --git a/src/csharp/Grpc.IntegrationTesting/InteropClient.cs b/src/csharp/Grpc.IntegrationTesting/InteropClient.cs
index aea40afee2c..d273867a6a7 100644
--- a/src/csharp/Grpc.IntegrationTesting/InteropClient.cs
+++ b/src/csharp/Grpc.IntegrationTesting/InteropClient.cs
@@ -145,16 +145,26 @@ namespace Grpc.IntegrationTesting
 
             if (options.TestCase == "jwt_token_creds")
             {
+#if !NETSTANDARD1_5
                 var googleCredential = await GoogleCredential.GetApplicationDefaultAsync();
                 Assert.IsTrue(googleCredential.IsCreateScopedRequired);
                 credentials = ChannelCredentials.Create(credentials, googleCredential.ToCallCredentials());
+#else
+                // TODO(jtattermusch): implement this
+                throw new NotImplementedException("Not supported on CoreCLR yet");
+#endif
             }
 
             if (options.TestCase == "compute_engine_creds")
             {
+#if !NETSTANDARD1_5
                 var googleCredential = await GoogleCredential.GetApplicationDefaultAsync();
                 Assert.IsFalse(googleCredential.IsCreateScopedRequired);
                 credentials = ChannelCredentials.Create(credentials, googleCredential.ToCallCredentials());
+#else
+                // TODO(jtattermusch): implement this
+                throw new NotImplementedException("Not supported on CoreCLR yet");
+#endif
             }
             return credentials;
         }
@@ -245,7 +255,7 @@ namespace Grpc.IntegrationTesting
         {
             Console.WriteLine("running client_streaming");
 
-            var bodySizes = new List<int> { 27182, 8, 1828, 45904 }.ConvertAll((size) => new StreamingInputCallRequest { Payload = CreateZerosPayload(size) });
+            var bodySizes = new List<int> { 27182, 8, 1828, 45904 }.Select((size) => new StreamingInputCallRequest { Payload = CreateZerosPayload(size) });
 
             using (var call = client.StreamingInputCall())
             {
@@ -266,7 +276,7 @@ namespace Grpc.IntegrationTesting
             var request = new StreamingOutputCallRequest
             {
                 ResponseType = PayloadType.Compressable,
-                ResponseParameters = { bodySizes.ConvertAll((size) => new ResponseParameters { Size = size }) }
+                ResponseParameters = { bodySizes.Select((size) => new ResponseParameters { Size = size }) }
             };
 
             using (var call = client.StreamingOutputCall(request))
@@ -276,7 +286,7 @@ namespace Grpc.IntegrationTesting
                 {
                     Assert.AreEqual(PayloadType.Compressable, res.Payload.Type);
                 }
-                CollectionAssert.AreEqual(bodySizes, responseList.ConvertAll((item) => item.Payload.Body.Length));
+                CollectionAssert.AreEqual(bodySizes, responseList.Select((item) => item.Payload.Body.Length));
             }
             Console.WriteLine("Passed!");
         }
@@ -398,6 +408,7 @@ namespace Grpc.IntegrationTesting
 
         public static async Task RunOAuth2AuthTokenAsync(TestService.TestServiceClient client, string oauthScope)
         {
+#if !NETSTANDARD1_5
             Console.WriteLine("running oauth2_auth_token");
             ITokenAccess credential = (await GoogleCredential.GetApplicationDefaultAsync()).CreateScoped(new[] { oauthScope });
             string oauth2Token = await credential.GetAccessTokenForRequestAsync();
@@ -415,10 +426,15 @@ namespace Grpc.IntegrationTesting
             Assert.True(oauthScope.Contains(response.OauthScope));
             Assert.AreEqual(GetEmailFromServiceAccountFile(), response.Username);
             Console.WriteLine("Passed!");
+#else
+            // TODO(jtattermusch): implement this
+            throw new NotImplementedException("Not supported on CoreCLR yet");
+#endif
         }
 
         public static async Task RunPerRpcCredsAsync(TestService.TestServiceClient client, string oauthScope)
         {
+#if !NETSTANDARD1_5
             Console.WriteLine("running per_rpc_creds");
             ITokenAccess googleCredential = await GoogleCredential.GetApplicationDefaultAsync();
 
@@ -432,6 +448,10 @@ namespace Grpc.IntegrationTesting
 
             Assert.AreEqual(GetEmailFromServiceAccountFile(), response.Username);
             Console.WriteLine("Passed!");
+#else
+            // TODO(jtattermusch): implement this
+            throw new NotImplementedException("Not supported on CoreCLR yet");
+#endif
         }
 
         public static async Task RunCancelAfterBeginAsync(TestService.TestServiceClient client)
@@ -626,13 +646,17 @@ namespace Grpc.IntegrationTesting
         // extracts the client_email field from service account file used for auth test cases
         private static string GetEmailFromServiceAccountFile()
         {
+#if !NETSTANDARD1_5
             string keyFile = Environment.GetEnvironmentVariable("GOOGLE_APPLICATION_CREDENTIALS");
             Assert.IsNotNull(keyFile);
-
             var jobject = JObject.Parse(File.ReadAllText(keyFile));
             string email = jobject.GetValue("client_email").Value<string>();
             Assert.IsTrue(email.Length > 0);  // spec requires nonempty client email.
             return email;
+#else
+            // TODO(jtattermusch): implement this
+            throw new NotImplementedException("Not supported on CoreCLR yet");
+#endif
         }
 
         private static Metadata CreateTestMetadata()
diff --git a/src/csharp/Grpc.IntegrationTesting/MetadataCredentialsTest.cs b/src/csharp/Grpc.IntegrationTesting/MetadataCredentialsTest.cs
index f95af5008f1..9fd575f1900 100644
--- a/src/csharp/Grpc.IntegrationTesting/MetadataCredentialsTest.cs
+++ b/src/csharp/Grpc.IntegrationTesting/MetadataCredentialsTest.cs
@@ -40,7 +40,6 @@ using System.Threading.Tasks;
 using Grpc.Core;
 using Grpc.Core.Utils;
 using Grpc.Testing;
-using Moq;
 using NUnit.Framework;
 
 namespace Grpc.IntegrationTesting
@@ -52,19 +51,14 @@ namespace Grpc.IntegrationTesting
         Channel channel;
         TestService.TestServiceClient client;
         List<ChannelOption> options;
-        Mock<TestService.TestServiceBase> serviceMock;
         AsyncAuthInterceptor asyncAuthInterceptor;
 
         [SetUp]
         public void Init()
         {
-            serviceMock = new Mock<TestService.TestServiceBase>();
-            serviceMock.Setup(m => m.UnaryCall(It.IsAny<SimpleRequest>(), It.IsAny<ServerCallContext>()))
-                .Returns(new Func<SimpleRequest, ServerCallContext, Task<SimpleResponse>>(UnaryCallHandler));
-
             server = new Server
             {
-                Services = { TestService.BindService(serviceMock.Object) },
+                Services = { TestService.BindService(new FakeTestService()) },
                 Ports = { { Host, ServerPort.PickUnused, TestCredentials.CreateSslServerCredentials() } }
             };
             server.Start();
@@ -96,7 +90,7 @@ namespace Grpc.IntegrationTesting
             channel = new Channel(Host, server.Ports.Single().BoundPort, channelCredentials, options);
             client = TestService.NewClient(channel);
 
-            client.UnaryCall(new SimpleRequest {});
+            client.UnaryCall(new SimpleRequest { });
         }
 
         [Test]
@@ -109,11 +103,14 @@ namespace Grpc.IntegrationTesting
             client.UnaryCall(new SimpleRequest { }, new CallOptions(credentials: callCredentials));
         }
 
-        private Task<SimpleResponse> UnaryCallHandler(SimpleRequest request, ServerCallContext context)
+        private class FakeTestService : TestService.TestServiceBase
         {
-            var authToken = context.RequestHeaders.First((entry) => entry.Key == "authorization").Value;
-            Assert.AreEqual("SECRET_TOKEN", authToken);
-            return Task.FromResult(new SimpleResponse());
+            public override Task<SimpleResponse> UnaryCall(SimpleRequest request, ServerCallContext context)
+            {
+                var authToken = context.RequestHeaders.First((entry) => entry.Key == "authorization").Value;
+                Assert.AreEqual("SECRET_TOKEN", authToken);
+                return Task.FromResult(new SimpleResponse());
+            }
         }
     }
 }
diff --git a/src/csharp/Grpc.IntegrationTesting/NUnitMain.cs b/src/csharp/Grpc.IntegrationTesting/NUnitMain.cs
index d8902de08f5..100ff0b5de9 100644
--- a/src/csharp/Grpc.IntegrationTesting/NUnitMain.cs
+++ b/src/csharp/Grpc.IntegrationTesting/NUnitMain.cs
@@ -49,7 +49,7 @@ namespace Grpc.IntegrationTesting
         {
             // Make logger immune to NUnit capturing stdout and stderr to workaround https://github.com/nunit/nunit/issues/1406.
             GrpcEnvironment.SetLogger(new TextWriterLogger(Console.Error));
-#if DOTNET5_4
+#if NETSTANDARD1_5
             return new AutoRun(typeof(NUnitMain).GetTypeInfo().Assembly).Execute(args, new ExtendedTextWrapper(Console.Out), Console.In);
 #else
             return new AutoRun().Execute(args);
diff --git a/src/csharp/Grpc.IntegrationTesting/TestCredentials.cs b/src/csharp/Grpc.IntegrationTesting/TestCredentials.cs
index 774563d752f..60b9cf4e0b7 100644
--- a/src/csharp/Grpc.IntegrationTesting/TestCredentials.cs
+++ b/src/csharp/Grpc.IntegrationTesting/TestCredentials.cs
@@ -90,7 +90,7 @@ namespace Grpc.IntegrationTesting
 
         private static string GetPath(string relativePath)
         {
-            var assemblyDir = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
+            var assemblyDir = Path.GetDirectoryName(typeof(TestCredentials).GetTypeInfo().Assembly.Location);
             return Path.Combine(assemblyDir, relativePath);
         }
     }
diff --git a/src/csharp/Grpc.IntegrationTesting/project.json b/src/csharp/Grpc.IntegrationTesting/project.json
index 0093531fa9e..6c1d31b3c45 100644
--- a/src/csharp/Grpc.IntegrationTesting/project.json
+++ b/src/csharp/Grpc.IntegrationTesting/project.json
@@ -1,23 +1,51 @@
 {
   "buildOptions": {
     "compile": "**/*.cs",
+    "copyToOutput": {
+      "mappings": {
+        "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+        "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll"
+      },
+      "include": "data/*"
+    },
     "emitEntryPoint": true
   },
   "dependencies": {
-    "Grpc.Auth": "0.0.1",
-    "Grpc.Core": "0.0.1",
+    "Grpc.Auth": {
+      "version": "0.0.1",
+      "taget": "project"
+    },
+    "Grpc.Core": {
+      "version": "0.0.1",
+      "taget": "project"
+    },
     "Google.Protobuf": "3.0.0-beta3",
     "CommandLineParser": "1.9.71",
-    "Moq": "4.2.1510.2205",
     "NUnit": "3.2.0",
     "NUnitLite": "3.2.0-*"
   },
   "frameworks": {
     "net45": {
+      "dependencies": {
+        "Moq": "4.2.1510.2205"
+      },
       "frameworkAssemblies": {
         "System.Runtime": "",
         "System.IO": ""
       }
+    },
+    "netstandard1.5": {
+      "imports": [
+        "portable-net45",
+        "net45"
+      ],
+      "dependencies": {
+        "NETStandard.Library": "1.5.0-rc2-24027",
+        "System.Linq.Expressions": "4.0.11-rc2-24027"
+      }
     }
+  },
+  "runtimes": {
+    "win7-x64": { }
   }
 }

From 2e12db9c319bcbdbb2fa570149f88e4b496b558c Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Thu, 16 Jun 2016 16:53:59 -0700
Subject: [PATCH 085/280] Test polling island merges

---
 Makefile                                 |  36 ++++
 build.yaml                               |  12 ++
 src/core/lib/iomgr/ev_epoll_linux.c      |  51 +++++-
 src/core/lib/iomgr/ev_epoll_linux.h      |   6 +
 src/core/lib/iomgr/ev_posix.c            |   7 +
 src/core/lib/iomgr/ev_posix.h            |   3 +
 test/core/iomgr/ev_epoll_linux_test.c    | 222 +++++++++++++++++++++++
 tools/run_tests/sources_and_headers.json |  16 ++
 tools/run_tests/tests.json               |  15 ++
 9 files changed, 366 insertions(+), 2 deletions(-)
 create mode 100644 test/core/iomgr/ev_epoll_linux_test.c

diff --git a/Makefile b/Makefile
index e615704395b..825684cc2dd 100644
--- a/Makefile
+++ b/Makefile
@@ -905,6 +905,7 @@ dns_resolver_connectivity_test: $(BINDIR)/$(CONFIG)/dns_resolver_connectivity_te
 dns_resolver_test: $(BINDIR)/$(CONFIG)/dns_resolver_test
 dualstack_socket_test: $(BINDIR)/$(CONFIG)/dualstack_socket_test
 endpoint_pair_test: $(BINDIR)/$(CONFIG)/endpoint_pair_test
+ev_epoll_linux_test: $(BINDIR)/$(CONFIG)/ev_epoll_linux_test
 fd_conservation_posix_test: $(BINDIR)/$(CONFIG)/fd_conservation_posix_test
 fd_posix_test: $(BINDIR)/$(CONFIG)/fd_posix_test
 fling_client: $(BINDIR)/$(CONFIG)/fling_client
@@ -1242,6 +1243,7 @@ buildtests_c: privatelibs_c \
   $(BINDIR)/$(CONFIG)/dns_resolver_test \
   $(BINDIR)/$(CONFIG)/dualstack_socket_test \
   $(BINDIR)/$(CONFIG)/endpoint_pair_test \
+  $(BINDIR)/$(CONFIG)/ev_epoll_linux_test \
   $(BINDIR)/$(CONFIG)/fd_conservation_posix_test \
   $(BINDIR)/$(CONFIG)/fd_posix_test \
   $(BINDIR)/$(CONFIG)/fling_client \
@@ -1512,6 +1514,8 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/dualstack_socket_test || ( echo test dualstack_socket_test failed ; exit 1 )
 	$(E) "[RUN]     Testing endpoint_pair_test"
 	$(Q) $(BINDIR)/$(CONFIG)/endpoint_pair_test || ( echo test endpoint_pair_test failed ; exit 1 )
+	$(E) "[RUN]     Testing ev_epoll_linux_test"
+	$(Q) $(BINDIR)/$(CONFIG)/ev_epoll_linux_test || ( echo test ev_epoll_linux_test failed ; exit 1 )
 	$(E) "[RUN]     Testing fd_conservation_posix_test"
 	$(Q) $(BINDIR)/$(CONFIG)/fd_conservation_posix_test || ( echo test fd_conservation_posix_test failed ; exit 1 )
 	$(E) "[RUN]     Testing fd_posix_test"
@@ -7130,6 +7134,38 @@ endif
 endif
 
 
+EV_EPOLL_LINUX_TEST_SRC = \
+    test/core/iomgr/ev_epoll_linux_test.c \
+
+EV_EPOLL_LINUX_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(EV_EPOLL_LINUX_TEST_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/ev_epoll_linux_test: openssl_dep_error
+
+else
+
+
+
+$(BINDIR)/$(CONFIG)/ev_epoll_linux_test: $(EV_EPOLL_LINUX_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LD) $(LDFLAGS) $(EV_EPOLL_LINUX_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/ev_epoll_linux_test
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/core/iomgr/ev_epoll_linux_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+
+deps_ev_epoll_linux_test: $(EV_EPOLL_LINUX_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(EV_EPOLL_LINUX_TEST_OBJS:.o=.dep)
+endif
+endif
+
+
 FD_CONSERVATION_POSIX_TEST_SRC = \
     test/core/iomgr/fd_conservation_posix_test.c \
 
diff --git a/build.yaml b/build.yaml
index 7790e0c5174..84f4ea521be 100644
--- a/build.yaml
+++ b/build.yaml
@@ -1407,6 +1407,18 @@ targets:
   - grpc
   - gpr_test_util
   - gpr
+- name: ev_epoll_linux_test
+  build: test
+  language: c
+  src:
+  - test/core/iomgr/ev_epoll_linux_test.c
+  deps:
+  - grpc_test_util
+  - grpc
+  - gpr_test_util
+  - gpr
+  platforms:
+  - linux
 - name: fd_conservation_posix_test
   build: test
   language: c
diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 1fb59474640..ed2c494b783 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -317,8 +317,9 @@ static void polling_island_remove_all_fds_locked(polling_island *pi,
     if (err < 0 && errno != ENOENT) {
       /* TODO: sreek - We need a better way to bubble up this error instead of
       * just logging a message */
-      gpr_log(GPR_ERROR, "epoll_ctl deleting fds[%zu]: %d failed with error: %s",
-              i, pi->fds[i]->fd, strerror(errno));
+      gpr_log(GPR_ERROR,
+              "epoll_ctl deleting fds[%zu]: %d failed with error: %s", i,
+              pi->fds[i]->fd, strerror(errno));
     }
 
     if (remove_fd_refs) {
@@ -1458,6 +1459,52 @@ static void pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx,
   gpr_mu_unlock(&bag->mu);
 }
 
+/* Test helper functions
+ * */
+void *grpc_fd_get_polling_island(grpc_fd *fd) {
+  polling_island *pi;
+
+  gpr_mu_lock(&fd->pi_mu);
+  pi = fd->polling_island;
+  gpr_mu_unlock(&fd->pi_mu);
+
+  return pi;
+}
+
+void *grpc_pollset_get_polling_island(grpc_pollset *ps) {
+  polling_island *pi;
+
+  gpr_mu_lock(&ps->pi_mu);
+  pi = ps->polling_island;
+  gpr_mu_unlock(&ps->pi_mu);
+
+  return pi;
+}
+
+static polling_island *get_polling_island(polling_island *p) {
+  if (p == NULL) {
+    return NULL;
+  }
+
+  polling_island *next;
+  gpr_mu_lock(&p->mu);
+  while (p->merged_to != NULL) {
+    next = p->merged_to;
+    gpr_mu_unlock(&p->mu);
+    p = next;
+    gpr_mu_lock(&p->mu);
+  }
+  gpr_mu_unlock(&p->mu);
+
+  return p;
+}
+
+bool grpc_are_polling_islands_equal(void *p, void *q) {
+  p = get_polling_island(p);
+  q = get_polling_island(q);
+  return p == q;
+}
+
 /*******************************************************************************
  * Event engine binding
  */
diff --git a/src/core/lib/iomgr/ev_epoll_linux.h b/src/core/lib/iomgr/ev_epoll_linux.h
index 8c819975a4c..7a494aba198 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.h
+++ b/src/core/lib/iomgr/ev_epoll_linux.h
@@ -38,4 +38,10 @@
 
 const grpc_event_engine_vtable *grpc_init_epoll_linux(void);
 
+#ifdef GPR_LINUX_EPOLL
+void *grpc_fd_get_polling_island(grpc_fd *fd);
+void *grpc_pollset_get_polling_island(grpc_pollset *ps);
+bool grpc_are_polling_islands_equal(void *p, void *q);
+#endif /* defined(GPR_LINUX_EPOLL) */
+
 #endif /* GRPC_CORE_LIB_IOMGR_EV_EPOLL_LINUX_H */
diff --git a/src/core/lib/iomgr/ev_posix.c b/src/core/lib/iomgr/ev_posix.c
index 2b15967adcc..5b20600a6f7 100644
--- a/src/core/lib/iomgr/ev_posix.c
+++ b/src/core/lib/iomgr/ev_posix.c
@@ -54,6 +54,7 @@
 grpc_poll_function_type grpc_poll_function = poll;
 
 static const grpc_event_engine_vtable *g_event_engine;
+static const char* g_poll_strategy_name = NULL;
 
 typedef const grpc_event_engine_vtable *(*event_engine_factory_fn)(void);
 
@@ -101,6 +102,7 @@ static void try_engine(const char *engine) {
   for (size_t i = 0; i < GPR_ARRAY_SIZE(g_factories); i++) {
     if (is(engine, g_factories[i].name)) {
       if ((g_event_engine = g_factories[i].factory())) {
+        g_poll_strategy_name = g_factories[i].name;
         gpr_log(GPR_DEBUG, "Using polling engine: %s", g_factories[i].name);
         return;
       }
@@ -108,6 +110,11 @@ static void try_engine(const char *engine) {
   }
 }
 
+/* Call this only after calling grpc_event_engine_init() */
+const char *grpc_get_poll_strategy_name() {
+  return g_poll_strategy_name;
+}
+
 void grpc_event_engine_init(void) {
   char *s = gpr_getenv("GRPC_POLL_STRATEGY");
   if (s == NULL) {
diff --git a/src/core/lib/iomgr/ev_posix.h b/src/core/lib/iomgr/ev_posix.h
index 344bf63438a..3ed5a5f9562 100644
--- a/src/core/lib/iomgr/ev_posix.h
+++ b/src/core/lib/iomgr/ev_posix.h
@@ -98,6 +98,9 @@ typedef struct grpc_event_engine_vtable {
 void grpc_event_engine_init(void);
 void grpc_event_engine_shutdown(void);
 
+/* Return the name of the poll strategy */
+const char* grpc_get_poll_strategy_name();
+
 /* Create a wrapped file descriptor.
    Requires fd is a non-blocking file descriptor.
    This takes ownership of closing fd. */
diff --git a/test/core/iomgr/ev_epoll_linux_test.c b/test/core/iomgr/ev_epoll_linux_test.c
new file mode 100644
index 00000000000..51da15faa7a
--- /dev/null
+++ b/test/core/iomgr/ev_epoll_linux_test.c
@@ -0,0 +1,222 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/ev_epoll_linux.h"
+#include "src/core/lib/iomgr/ev_posix.h"
+
+#include <poll.h>
+#include <string.h>
+#include <sys/eventfd.h>
+#include <unistd.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+
+#include "src/core/lib/iomgr/iomgr.h"
+#include "test/core/util/test_config.h"
+
+typedef struct test_pollset {
+  grpc_pollset *pollset;
+  gpr_mu *mu;
+} test_pollset;
+
+typedef struct test_fd {
+  int inner_fd;
+  grpc_fd *fd;
+} test_fd;
+
+static void test_fd_init(test_fd *fds, int num_fds) {
+  int i;
+  for (i = 0; i < num_fds; i++) {
+    fds[i].inner_fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
+    fds[i].fd = grpc_fd_create(fds[i].inner_fd, "test_fd");
+  }
+}
+
+static void test_fd_cleanup(grpc_exec_ctx *exec_ctx, test_fd *fds,
+                            int num_fds) {
+  int release_fd;
+  int i;
+
+  for (i = 0; i < num_fds; i++) {
+    grpc_fd_shutdown(exec_ctx, fds[i].fd);
+    grpc_exec_ctx_flush(exec_ctx);
+
+    grpc_fd_orphan(exec_ctx, fds[i].fd, NULL, &release_fd, "test_fd_cleanup");
+    grpc_exec_ctx_flush(exec_ctx);
+
+    GPR_ASSERT(release_fd == fds[i].inner_fd);
+    close(fds[i].inner_fd);
+  }
+}
+
+static void test_pollset_init(test_pollset *pollsets, int num_pollsets) {
+  int i;
+  for (i = 0; i < num_pollsets; i++) {
+    pollsets[i].pollset = gpr_malloc(grpc_pollset_size());
+    grpc_pollset_init(pollsets[i].pollset, &pollsets[i].mu);
+  }
+}
+
+static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, bool success) {
+  grpc_pollset_destroy(p);
+}
+
+static void test_pollset_cleanup(grpc_exec_ctx *exec_ctx,
+                                 test_pollset *pollsets, int num_pollsets) {
+  grpc_closure destroyed;
+  int i;
+
+  for (i = 0; i < num_pollsets; i++) {
+    grpc_closure_init(&destroyed, destroy_pollset, pollsets[i].pollset);
+    grpc_pollset_shutdown(exec_ctx, pollsets[i].pollset, &destroyed);
+
+    grpc_exec_ctx_flush(exec_ctx);
+    gpr_free(pollsets[i].pollset);
+  }
+}
+
+#define NUM_FDS 8
+#define NUM_POLLSETS 4
+/*
+ * Cases to test:
+ *  case 1) Polling islands of both fd and pollset are NULL
+ *  case 2) Polling island of fd is NULL but that of pollset is not-NULL
+ *  case 3) Polling island of fd is not-NULL but that of pollset is NULL
+ *  case 4) Polling islands of both fd and pollset are not-NULL and:
+ *     case 4.1) Polling islands of fd and pollset are equal
+ *     case 4.2) Polling islands of fd and pollset are NOT-equal (This results
+ *     in a merge)
+ * */
+static void test_add_fd_to_pollset() {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  test_fd fds[NUM_FDS];
+  test_pollset pollsets[NUM_POLLSETS];
+  void *expected_pi = NULL;
+  int i;
+
+  test_fd_init(fds, NUM_FDS);
+  test_pollset_init(pollsets, NUM_POLLSETS);
+
+  /*Step 1.
+   * Create three polling islands (This will exercise test case 1 and 2) with
+   * the following configuration:
+   *   polling island 0 = { fds:0,1,2, pollsets:0}
+   *   polling island 1 = { fds:3,4,   pollsets:1}
+   *   polling island 2 = { fds:5,6,7  pollsets:2}
+   *
+   *Step 2.
+   * Add pollset 3 to polling island 0 (by adding fds 0 and 1 to pollset 3)
+   * (This will exercise test cases 3 and 4.1). The configuration becomes:
+   *   polling island 0 = { fds:0,1,2, pollsets:0,3} <<< pollset 3 added here
+   *   polling island 1 = { fds:3,4,   pollsets:1}
+   *   polling island 2 = { fds:5,6,7  pollsets:2}
+   *
+   *Step 3.
+   * Merge polling islands 0 and 1 by adding fd 0 to pollset 1 (This will
+   * exercise test case 4.2). The configuration becomes:
+   *   polling island (merged) = {fds: 0,1,2,3,4, pollsets: 0,1,3}
+   *   polling island 2 = {fds: 5,6,7 pollsets: 2}
+   *
+   *Step 4.
+   * Finally do one more merge by adding fd 3 to pollset 2.
+   *   polling island (merged) = {fds: 0,1,2,3,4,5,6,7, pollsets: 0,1,2,3}
+   */
+
+  /* == Step 1 == */
+  for (i = 0; i <= 2; i++) {
+    grpc_pollset_add_fd(&exec_ctx, pollsets[0].pollset, fds[i].fd);
+    grpc_exec_ctx_flush(&exec_ctx);
+  }
+
+  for (i = 3; i <= 4; i++) {
+    grpc_pollset_add_fd(&exec_ctx, pollsets[1].pollset, fds[i].fd);
+    grpc_exec_ctx_flush(&exec_ctx);
+  }
+
+  for (i = 5; i <= 7; i++) {
+    grpc_pollset_add_fd(&exec_ctx, pollsets[2].pollset, fds[i].fd);
+    grpc_exec_ctx_flush(&exec_ctx);
+  }
+
+  /* == Step 2 == */
+  for (i = 0; i <= 1; i++) {
+    grpc_pollset_add_fd(&exec_ctx, pollsets[3].pollset, fds[i].fd);
+    grpc_exec_ctx_flush(&exec_ctx);
+  }
+
+  /* == Step 3 == */
+  grpc_pollset_add_fd(&exec_ctx, pollsets[1].pollset, fds[0].fd);
+  grpc_exec_ctx_flush(&exec_ctx);
+
+  /* == Step 4 == */
+  grpc_pollset_add_fd(&exec_ctx, pollsets[2].pollset, fds[3].fd);
+  grpc_exec_ctx_flush(&exec_ctx);
+
+  /* All polling islands are merged at this point */
+
+  /* Compare Fd:0's polling island with that of all other Fds */
+  expected_pi = grpc_fd_get_polling_island(fds[0].fd);
+  for (i = 1; i < NUM_FDS; i++) {
+    GPR_ASSERT(grpc_are_polling_islands_equal(
+        expected_pi, grpc_fd_get_polling_island(fds[i].fd)));
+  }
+
+  /* Compare Fd:0's polling island with that of all other pollsets */
+  for (i = 0; i < NUM_POLLSETS; i++) {
+    GPR_ASSERT(grpc_are_polling_islands_equal(
+        expected_pi, grpc_pollset_get_polling_island(pollsets[i].pollset)));
+  }
+
+  test_fd_cleanup(&exec_ctx, fds, NUM_FDS);
+  test_pollset_cleanup(&exec_ctx, pollsets, NUM_POLLSETS);
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+int main(int argc, char **argv) {
+  const char *poll_strategy = NULL;
+  grpc_test_init(argc, argv);
+  grpc_iomgr_init();
+
+  poll_strategy = grpc_get_poll_strategy_name();
+  if (poll_strategy != NULL && strcmp(poll_strategy, "epoll") == 0) {
+    test_add_fd_to_pollset();
+  } else {
+    gpr_log(GPR_INFO,
+            "Skipping the test. The test is only relevant for 'epoll' "
+            "strategy. and the current strategy is: '%s'",
+            poll_strategy);
+  }
+  grpc_iomgr_shutdown();
+  return 0;
+}
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index e8ff61dc3fb..e9df72e43a1 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -315,6 +315,22 @@
     "third_party": false, 
     "type": "target"
   }, 
+  {
+    "deps": [
+      "gpr", 
+      "gpr_test_util", 
+      "grpc", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "language": "c", 
+    "name": "ev_epoll_linux_test", 
+    "src": [
+      "test/core/iomgr/ev_epoll_linux_test.c"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
   {
     "deps": [
       "gpr", 
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index 5a84a41b638..ba661840dad 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -377,6 +377,21 @@
       "windows"
     ]
   }, 
+  {
+    "args": [], 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "gtest": false, 
+    "language": "c", 
+    "name": "ev_epoll_linux_test", 
+    "platforms": [
+      "linux"
+    ]
+  }, 
   {
     "args": [], 
     "ci_platforms": [

From 87e6770a1819d44f352e7ba5782ca1f7dd8cffca Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Thu, 16 Jun 2016 22:04:08 -0700
Subject: [PATCH 086/280] pr comments

---
 doc/compression.md | 40 +++++++++++++++++++++++-----------------
 1 file changed, 23 insertions(+), 17 deletions(-)

diff --git a/doc/compression.md b/doc/compression.md
index ddbbff1c541..6e455636021 100644
--- a/doc/compression.md
+++ b/doc/compression.md
@@ -41,13 +41,14 @@ of the request, including not performing any compression, regardless of channel
 and RPC settings (for example, if compression would result in small or negative
 gains).
 
-A compressed message from a client with an algorithm unsupported by a server,
-WILL result in an INVALID\_ARGUMENT error, alongside the receiving peer's
-`grpc-accept-encoding` header specifying the algorithms it accepts. If an
-INTERNAL error is returned from the server despite having used one of the
-algorithms from the `grpc-accept-encoding h`eader, the cause MUST NOT be related
-to compression. Data sent from a server compressed with an algorithm not
-supported by the client will also result in an INTERNAL error.
+When a message from a client compressed with an unsupported algorithm is
+processed by a server, it WILL result in an INVALID\_ARGUMENT error. The server
+will include in its response a `grpc-accept-encoding` header specifying the
+algorithms it does accept. If an INTERNAL error is returned from the server
+despite having used one of the algorithms from the `grpc-accept-encoding`
+header, the cause MUST NOT be related to compression. Data sent from a server
+compressed with an algorithm not supported by the client WILL result in an
+INTERNAL error on the client side.
 
 Note that a peer MAY choose to not disclose all the encodings it supports.
 However, if it receives a message compressed in an undisclosed but supported
@@ -67,16 +68,21 @@ cases.
 
 ### Compression Levels and Algorithms
 
-We currently (as of July 2015) support _gzip_ and _deflate_ as algorithms (with
-the possible future addition of snappy). In order to simplify the public API,
-it's intended to abstract the algorithms as _compression levels_ (such as "low",
-"medium", "high") that'd map to concrete algorithms and/or their settings (such
-as "low" mapping to "gzip -3" and "high" mapping to "gzip -9"). However, we
-can't presently (July 2015) implement said compression levels at the client side
-without either a initial negotiation of capabilities or an automatic retry
-mechanism. Therefore, compression levels are only supported at the server side,
-which is aware of the client's capabilities by virtue of the incoming
-Message-Accept-Encoding header.
+The set of supported algorithm is implementation dependent. In order to simplify
+the public API and to operate seamlessly across implementations (both in terms
+of languages but also different version of the same one), we introduce the idea
+of _compression levels_ (such as "low", "medium", "high").
+
+Levels map to concrete algorithms and/or their settings (such as "low" mapping
+to "gzip -3" and "high" mapping to "gzip -9") automatically depending on what a
+peer is known to support. A server is always aware of what its clients support,
+as clients disclose it in their Message-Accept-Encoding header as part of their
+initial call. A client doesn't a priori (presently) know which algorithms a
+server supports. This issue can be addressed with an initial negotiation of
+capabilities or an automatic retry mechanism. These features will be implemented
+in the future. Currently however, compression levels are only supported at the
+server side, which is aware of the client's capabilities by virtue of the
+incoming.
 
 ### Propagation to child RPCs
 

From b9df2760ed15930429305f01407914db106510d5 Mon Sep 17 00:00:00 2001
From: vjpai <vpai@google.com>
Date: Fri, 17 Jun 2016 00:27:00 -0700
Subject: [PATCH 087/280] Add proper documentation of ordering and
 thread-safety for streaming (sync and async) APIs

---
 include/grpc++/impl/codegen/async_stream.h     | 10 +++++++++-
 include/grpc++/impl/codegen/completion_queue.h | 14 ++++++++++++--
 include/grpc++/impl/codegen/sync_stream.h      | 10 ++++++++--
 3 files changed, 29 insertions(+), 5 deletions(-)

diff --git a/include/grpc++/impl/codegen/async_stream.h b/include/grpc++/impl/codegen/async_stream.h
index 0606441549e..c74737ce5f8 100644
--- a/include/grpc++/impl/codegen/async_stream.h
+++ b/include/grpc++/impl/codegen/async_stream.h
@@ -52,11 +52,14 @@ class ClientAsyncStreamingInterface {
 
   /// Request notification of the reading of the initial metadata. Completion
   /// will be notified by \a tag on the associated completion queue.
+  /// This call is optional, but if it is used, it cannot be used concurrently
+  /// with Read
   ///
   /// \param[in] tag Tag identifying this request.
   virtual void ReadInitialMetadata(void* tag) = 0;
 
-  /// Request notification completion.
+  /// Indicate that the stream is to be finished and request notification
+  /// Should not be used concurrently with other operations
   ///
   /// \param[out] status To be updated with the operation status.
   /// \param[in] tag Tag identifying this request.
@@ -71,6 +74,8 @@ class AsyncReaderInterface {
 
   /// Read a message of type \a R into \a msg. Completion will be notified by \a
   /// tag on the associated completion queue.
+  /// This is thread-safe with respect to other streaming APIs except for Finish
+  /// on the same stream.
   ///
   /// \param[out] msg Where to eventually store the read message.
   /// \param[in] tag The tag identifying the operation.
@@ -88,6 +93,7 @@ class AsyncWriterInterface {
   /// Only one write may be outstanding at any given time. This means that
   /// after calling Write, one must wait to receive \a tag from the completion
   /// queue BEFORE calling Write again.
+  /// This is thread-safe with respect to Read
   ///
   /// \param[in] msg The message to be written.
   /// \param[in] tag The tag identifying the operation.
@@ -158,6 +164,7 @@ class ClientAsyncWriterInterface : public ClientAsyncStreamingInterface,
                                    public AsyncWriterInterface<W> {
  public:
   /// Signal the client is done with the writes.
+  /// Thread-safe with respect to Read
   ///
   /// \param[in] tag The tag identifying the operation.
   virtual void WritesDone(void* tag) = 0;
@@ -229,6 +236,7 @@ class ClientAsyncReaderWriterInterface : public ClientAsyncStreamingInterface,
                                          public AsyncReaderInterface<R> {
  public:
   /// Signal the client is done with the writes.
+  /// Thread-safe with respect to Read
   ///
   /// \param[in] tag The tag identifying the operation.
   virtual void WritesDone(void* tag) = 0;
diff --git a/include/grpc++/impl/codegen/completion_queue.h b/include/grpc++/impl/codegen/completion_queue.h
index 1b84b447050..f138ebe7de2 100644
--- a/include/grpc++/impl/codegen/completion_queue.h
+++ b/include/grpc++/impl/codegen/completion_queue.h
@@ -31,8 +31,18 @@
  *
  */
 
-/// A completion queue implements a concurrent producer-consumer queue, with two
-/// main methods, \a Next and \a AsyncNext.
+/// A completion queue implements a concurrent producer-consumer queue, with
+/// two main API-exposed methods: \a Next and \a AsyncNext. These
+/// methods are the essential component of the gRPC C++ asynchronous API.
+/// There is also a Shutdown method to indicate that a given completion queue
+/// will no longer have regular events. This must be called before the
+/// completion queue is destroyed.
+/// All completion queue APIs are thread-safe and may be used concurrently with
+/// any other completion queue API invocation; it is acceptable to have
+/// multiple threads calling Next or AsyncNext on the same or different
+/// completion queues, or to call these methods concurrently with a Shutdown
+/// elsewhere. All of these should be completed, though, before a completion
+/// queue destructor is called.
 #ifndef GRPCXX_IMPL_CODEGEN_COMPLETION_QUEUE_H
 #define GRPCXX_IMPL_CODEGEN_COMPLETION_QUEUE_H
 
diff --git a/include/grpc++/impl/codegen/sync_stream.h b/include/grpc++/impl/codegen/sync_stream.h
index e94ffe58422..9d7966ba04b 100644
--- a/include/grpc++/impl/codegen/sync_stream.h
+++ b/include/grpc++/impl/codegen/sync_stream.h
@@ -71,6 +71,8 @@ class ReaderInterface {
   virtual ~ReaderInterface() {}
 
   /// Blocking read a message and parse to \a msg. Returns \a true on success.
+  /// This is thread-safe with respect to other streaming APIs except for Finish
+  /// on the same stream. (Finish must be called as described above.)
   ///
   /// \param[out] msg The read message.
   ///
@@ -87,6 +89,7 @@ class WriterInterface {
   virtual ~WriterInterface() {}
 
   /// Blocking write \a msg to the stream with options.
+  /// This is thread-safe with respect to Read
   ///
   /// \param msg The message to be written to the stream.
   /// \param options Options affecting the write operation.
@@ -95,6 +98,7 @@ class WriterInterface {
   virtual bool Write(const W& msg, const WriteOptions& options) = 0;
 
   /// Blocking write \a msg to the stream with default options.
+  /// This is thread-safe with respect to Read
   ///
   /// \param msg The message to be written to the stream.
   ///
@@ -174,7 +178,8 @@ class ClientWriterInterface : public ClientStreamingInterface,
                               public WriterInterface<W> {
  public:
   /// Half close writing from the client.
-  /// Block until writes are completed.
+  /// Block until currently-pending writes are completed.
+  /// Thread safe with respect to Read operations only
   ///
   /// \return Whether the writes were successful.
   virtual bool WritesDone() = 0;
@@ -257,7 +262,8 @@ class ClientReaderWriterInterface : public ClientStreamingInterface,
   /// the metadata will be available in ClientContext after the first read.
   virtual void WaitForInitialMetadata() = 0;
 
-  /// Block until writes are completed.
+  /// Block until currently-pending writes are completed.
+  /// Thread-safe with respect to Read
   ///
   /// \return Whether the writes were successful.
   virtual bool WritesDone() = 0;

From dc44e179507697ba23ce2d6180872af660b185a9 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Fri, 17 Jun 2016 12:47:10 -0700
Subject: [PATCH 088/280] Added third_party/protobuf/src to protoc's include
 path

---
 Makefile                    | 52 ++++++++++++++++++-------------------
 templates/Makefile.template |  4 +--
 2 files changed, 28 insertions(+), 28 deletions(-)

diff --git a/Makefile b/Makefile
index f500c7472f1..3df98b9f386 100644
--- a/Makefile
+++ b/Makefile
@@ -1891,12 +1891,12 @@ else
 $(GENDIR)/src/proto/grpc/lb/v1/load_balancer.pb.cc: src/proto/grpc/lb/v1/load_balancer.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) 
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --cpp_out=$(GENDIR) $<
 
 $(GENDIR)/src/proto/grpc/lb/v1/load_balancer.grpc.pb.cc: src/proto/grpc/lb/v1/load_balancer.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) 
 	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
@@ -1906,12 +1906,12 @@ else
 $(GENDIR)/src/proto/grpc/testing/compiler_test.pb.cc: src/proto/grpc/testing/compiler_test.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) 
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --cpp_out=$(GENDIR) $<
 
 $(GENDIR)/src/proto/grpc/testing/compiler_test.grpc.pb.cc: src/proto/grpc/testing/compiler_test.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) 
 	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
@@ -1921,12 +1921,12 @@ else
 $(GENDIR)/src/proto/grpc/testing/control.pb.cc: src/proto/grpc/testing/control.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) $(GENDIR)/src/proto/grpc/testing/payloads.pb.cc $(GENDIR)/src/proto/grpc/testing/stats.pb.cc
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --cpp_out=$(GENDIR) $<
 
 $(GENDIR)/src/proto/grpc/testing/control.grpc.pb.cc: src/proto/grpc/testing/control.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) $(GENDIR)/src/proto/grpc/testing/payloads.pb.cc $(GENDIR)/src/proto/grpc/testing/payloads.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/stats.pb.cc $(GENDIR)/src/proto/grpc/testing/stats.grpc.pb.cc
 	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
@@ -1936,12 +1936,12 @@ else
 $(GENDIR)/src/proto/grpc/testing/duplicate/echo_duplicate.pb.cc: src/proto/grpc/testing/duplicate/echo_duplicate.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) $(GENDIR)/src/proto/grpc/testing/echo_messages.pb.cc
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --cpp_out=$(GENDIR) $<
 
 $(GENDIR)/src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.cc: src/proto/grpc/testing/duplicate/echo_duplicate.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) $(GENDIR)/src/proto/grpc/testing/echo_messages.pb.cc $(GENDIR)/src/proto/grpc/testing/echo_messages.grpc.pb.cc
 	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
@@ -1951,12 +1951,12 @@ else
 $(GENDIR)/src/proto/grpc/testing/echo.pb.cc: src/proto/grpc/testing/echo.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) $(GENDIR)/src/proto/grpc/testing/echo_messages.pb.cc
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --cpp_out=$(GENDIR) $<
 
 $(GENDIR)/src/proto/grpc/testing/echo.grpc.pb.cc: src/proto/grpc/testing/echo.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) $(GENDIR)/src/proto/grpc/testing/echo_messages.pb.cc $(GENDIR)/src/proto/grpc/testing/echo_messages.grpc.pb.cc
 	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
@@ -1966,12 +1966,12 @@ else
 $(GENDIR)/src/proto/grpc/testing/echo_messages.pb.cc: src/proto/grpc/testing/echo_messages.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) 
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --cpp_out=$(GENDIR) $<
 
 $(GENDIR)/src/proto/grpc/testing/echo_messages.grpc.pb.cc: src/proto/grpc/testing/echo_messages.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) 
 	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
@@ -1981,12 +1981,12 @@ else
 $(GENDIR)/src/proto/grpc/testing/empty.pb.cc: src/proto/grpc/testing/empty.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) 
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --cpp_out=$(GENDIR) $<
 
 $(GENDIR)/src/proto/grpc/testing/empty.grpc.pb.cc: src/proto/grpc/testing/empty.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) 
 	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
@@ -1996,12 +1996,12 @@ else
 $(GENDIR)/src/proto/grpc/testing/messages.pb.cc: src/proto/grpc/testing/messages.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) 
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --cpp_out=$(GENDIR) $<
 
 $(GENDIR)/src/proto/grpc/testing/messages.grpc.pb.cc: src/proto/grpc/testing/messages.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) 
 	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
@@ -2011,12 +2011,12 @@ else
 $(GENDIR)/src/proto/grpc/testing/metrics.pb.cc: src/proto/grpc/testing/metrics.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) 
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --cpp_out=$(GENDIR) $<
 
 $(GENDIR)/src/proto/grpc/testing/metrics.grpc.pb.cc: src/proto/grpc/testing/metrics.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) 
 	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
@@ -2026,12 +2026,12 @@ else
 $(GENDIR)/src/proto/grpc/testing/payloads.pb.cc: src/proto/grpc/testing/payloads.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) 
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --cpp_out=$(GENDIR) $<
 
 $(GENDIR)/src/proto/grpc/testing/payloads.grpc.pb.cc: src/proto/grpc/testing/payloads.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) 
 	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
@@ -2041,12 +2041,12 @@ else
 $(GENDIR)/src/proto/grpc/testing/services.pb.cc: src/proto/grpc/testing/services.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) $(GENDIR)/src/proto/grpc/testing/messages.pb.cc $(GENDIR)/src/proto/grpc/testing/control.pb.cc
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --cpp_out=$(GENDIR) $<
 
 $(GENDIR)/src/proto/grpc/testing/services.grpc.pb.cc: src/proto/grpc/testing/services.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) $(GENDIR)/src/proto/grpc/testing/messages.pb.cc $(GENDIR)/src/proto/grpc/testing/messages.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/control.pb.cc $(GENDIR)/src/proto/grpc/testing/control.grpc.pb.cc
 	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
@@ -2056,12 +2056,12 @@ else
 $(GENDIR)/src/proto/grpc/testing/stats.pb.cc: src/proto/grpc/testing/stats.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) 
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --cpp_out=$(GENDIR) $<
 
 $(GENDIR)/src/proto/grpc/testing/stats.grpc.pb.cc: src/proto/grpc/testing/stats.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) 
 	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
@@ -2071,12 +2071,12 @@ else
 $(GENDIR)/src/proto/grpc/testing/test.pb.cc: src/proto/grpc/testing/test.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) $(GENDIR)/src/proto/grpc/testing/empty.pb.cc $(GENDIR)/src/proto/grpc/testing/messages.pb.cc
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --cpp_out=$(GENDIR) $<
 
 $(GENDIR)/src/proto/grpc/testing/test.grpc.pb.cc: src/proto/grpc/testing/test.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) $(GENDIR)/src/proto/grpc/testing/empty.pb.cc $(GENDIR)/src/proto/grpc/testing/empty.grpc.pb.cc $(GENDIR)/src/proto/grpc/testing/messages.pb.cc $(GENDIR)/src/proto/grpc/testing/messages.grpc.pb.cc
 	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 
diff --git a/templates/Makefile.template b/templates/Makefile.template
index 079fef65ae8..f3e21c10ba4 100644
--- a/templates/Makefile.template
+++ b/templates/Makefile.template
@@ -1227,12 +1227,12 @@
   $(GENDIR)/${p}.pb.cc: ${p}.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) ${' '.join('$(GENDIR)/%s.pb.cc' % q for q in proto_deps.get(p, []))}
   	$(E) "[PROTOC]  Generating protobuf CC file from $<"
   	$(Q) mkdir -p `dirname $@`
-  	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
+  	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --cpp_out=$(GENDIR) $<
 
   $(GENDIR)/${p}.grpc.pb.cc: ${p}.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS) ${' '.join('$(GENDIR)/%s.pb.cc $(GENDIR)/%s.grpc.pb.cc' % (q,q) for q in proto_deps.get(p, []))}
   	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
   	$(Q) mkdir -p `dirname $@`
-  	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
+  	$(Q) $(PROTOC) -Ithird_party/protobuf/src -I. --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
   endif
 
   % endfor

From 3c65d24fabbee3f88fc505b54d82280c31b5e0f5 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Fri, 17 Jun 2016 15:18:18 -0700
Subject: [PATCH 089/280] updated stress test with new tests cases

---
 test/cpp/interop/stress_interop_client.cc | 14 +++++++--
 test/cpp/interop/stress_interop_client.h  | 36 +++++++++++++----------
 2 files changed, 31 insertions(+), 19 deletions(-)

diff --git a/test/cpp/interop/stress_interop_client.cc b/test/cpp/interop/stress_interop_client.cc
index aa95682e741..1d5fc80cf26 100644
--- a/test/cpp/interop/stress_interop_client.cc
+++ b/test/cpp/interop/stress_interop_client.cc
@@ -138,8 +138,12 @@ bool StressTestInteropClient::RunTest(TestCaseType test_case) {
       is_success = interop_client_->DoLargeUnary();
       break;
     }
-    case LARGE_COMPRESSED_UNARY: {
-      is_success = interop_client_->DoLargeCompressedUnary();
+    case CLIENT_COMPRESSED_UNARY: {
+      is_success = interop_client_->DoClientCompressedUnary();
+      break;
+    }
+    case CLIENT_COMPRESSED_STREAMING: {
+      is_success = interop_client_->DoClientCompressedStreaming();
       break;
     }
     case CLIENT_STREAMING: {
@@ -150,8 +154,12 @@ bool StressTestInteropClient::RunTest(TestCaseType test_case) {
       is_success = interop_client_->DoResponseStreaming();
       break;
     }
+    case SERVER_COMPRESSED_UNARY: {
+      is_success = interop_client_->DoServerCompressedUnary();
+      break;
+    }
     case SERVER_COMPRESSED_STREAMING: {
-      is_success = interop_client_->DoResponseCompressedStreaming();
+      is_success = interop_client_->DoServerCompressedStreaming();
       break;
     }
     case SLOW_CONSUMER: {
diff --git a/test/cpp/interop/stress_interop_client.h b/test/cpp/interop/stress_interop_client.h
index aa93b58b4a7..cf6a7134739 100644
--- a/test/cpp/interop/stress_interop_client.h
+++ b/test/cpp/interop/stress_interop_client.h
@@ -51,29 +51,33 @@ using std::vector;
 
 enum TestCaseType {
   UNKNOWN_TEST = -1,
-  EMPTY_UNARY = 0,
-  LARGE_UNARY = 1,
-  LARGE_COMPRESSED_UNARY = 2,
-  CLIENT_STREAMING = 3,
-  SERVER_STREAMING = 4,
-  SERVER_COMPRESSED_STREAMING = 5,
-  SLOW_CONSUMER = 6,
-  HALF_DUPLEX = 7,
-  PING_PONG = 8,
-  CANCEL_AFTER_BEGIN = 9,
-  CANCEL_AFTER_FIRST_RESPONSE = 10,
-  TIMEOUT_ON_SLEEPING_SERVER = 11,
-  EMPTY_STREAM = 12,
-  STATUS_CODE_AND_MESSAGE = 13,
-  CUSTOM_METADATA = 14
+  EMPTY_UNARY,
+  LARGE_UNARY,
+  CLIENT_COMPRESSED_UNARY,
+  CLIENT_COMPRESSED_STREAMING,
+  CLIENT_STREAMING,
+  SERVER_STREAMING,
+  SERVER_COMPRESSED_UNARY,
+  SERVER_COMPRESSED_STREAMING,
+  SLOW_CONSUMER,
+  HALF_DUPLEX,
+  PING_PONG,
+  CANCEL_AFTER_BEGIN,
+  CANCEL_AFTER_FIRST_RESPONSE,
+  TIMEOUT_ON_SLEEPING_SERVER,
+  EMPTY_STREAM,
+  STATUS_CODE_AND_MESSAGE,
+  CUSTOM_METADATA
 };
 
 const vector<pair<TestCaseType, grpc::string>> kTestCaseList = {
     {EMPTY_UNARY, "empty_unary"},
     {LARGE_UNARY, "large_unary"},
-    {LARGE_COMPRESSED_UNARY, "large_compressed_unary"},
+    {CLIENT_COMPRESSED_UNARY, "client_compressed_unary"},
+    {CLIENT_COMPRESSED_STREAMING, "client_compressed_streaming"},
     {CLIENT_STREAMING, "client_streaming"},
     {SERVER_STREAMING, "server_streaming"},
+    {SERVER_COMPRESSED_UNARY, "server_compressed_unary"},
     {SERVER_COMPRESSED_STREAMING, "server_compressed_streaming"},
     {SLOW_CONSUMER, "slow_consumer"},
     {HALF_DUPLEX, "half_duplex"},

From fab857eefc20a0dc96cd4e6a39a95892e3c105dc Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Fri, 17 Jun 2016 16:53:43 -0700
Subject: [PATCH 090/280] address review comments

---
 src/csharp/Grpc.Core.Tests/project.json       |  3 +-
 .../Grpc.Examples.MathClient/project.json     |  3 +-
 .../Grpc.Examples.MathServer/project.json     |  3 +-
 src/csharp/Grpc.Examples.Tests/project.json   |  3 +-
 src/csharp/Grpc.Examples/project.json         |  3 +-
 .../Grpc.HealthCheck.Tests/project.json       |  3 +-
 .../project.json                              |  3 +-
 .../project.json                              |  3 +-
 .../project.json                              |  3 +-
 .../project.json                              | 32 +++++++++++++++++++
 .../Grpc.IntegrationTesting/project.json      |  6 ++--
 11 files changed, 43 insertions(+), 22 deletions(-)
 create mode 100644 src/csharp/Grpc.IntegrationTesting.StressClient/project.json

diff --git a/src/csharp/Grpc.Core.Tests/project.json b/src/csharp/Grpc.Core.Tests/project.json
index 06718043142..13705a22227 100644
--- a/src/csharp/Grpc.Core.Tests/project.json
+++ b/src/csharp/Grpc.Core.Tests/project.json
@@ -11,8 +11,7 @@
   },
   "dependencies": {
     "Grpc.Core": {
-      "version": "0.0.1",
-      "taget": "project"
+      "target": "project"
     },
     "Newtonsoft.Json": "8.0.3",
     "NUnit": "3.2.0",
diff --git a/src/csharp/Grpc.Examples.MathClient/project.json b/src/csharp/Grpc.Examples.MathClient/project.json
index 791cd1dcb80..be9e123ff8b 100644
--- a/src/csharp/Grpc.Examples.MathClient/project.json
+++ b/src/csharp/Grpc.Examples.MathClient/project.json
@@ -11,8 +11,7 @@
   },
   "dependencies": {
     "Grpc.Examples": {
-      "version": "1.0.0",
-      "taget": "project"
+      "target": "project"
     }
   },
   "frameworks": {
diff --git a/src/csharp/Grpc.Examples.MathServer/project.json b/src/csharp/Grpc.Examples.MathServer/project.json
index 791cd1dcb80..be9e123ff8b 100644
--- a/src/csharp/Grpc.Examples.MathServer/project.json
+++ b/src/csharp/Grpc.Examples.MathServer/project.json
@@ -11,8 +11,7 @@
   },
   "dependencies": {
     "Grpc.Examples": {
-      "version": "1.0.0",
-      "taget": "project"
+      "target": "project"
     }
   },
   "frameworks": {
diff --git a/src/csharp/Grpc.Examples.Tests/project.json b/src/csharp/Grpc.Examples.Tests/project.json
index 6ef440e27dd..86f06a5aa9b 100644
--- a/src/csharp/Grpc.Examples.Tests/project.json
+++ b/src/csharp/Grpc.Examples.Tests/project.json
@@ -11,8 +11,7 @@
   },
   "dependencies": {
     "Grpc.Examples": {
-      "version": "1.0.0",
-      "taget": "project"
+      "target": "project"
     },
     "NUnit": "3.2.0",
     "NUnitLite": "3.2.0-*"
diff --git a/src/csharp/Grpc.Examples/project.json b/src/csharp/Grpc.Examples/project.json
index 4a3810596b0..610712f6460 100644
--- a/src/csharp/Grpc.Examples/project.json
+++ b/src/csharp/Grpc.Examples/project.json
@@ -5,8 +5,7 @@
 
   "dependencies": {
     "Grpc.Core": {
-      "version": "0.0.1",
-      "taget": "project"
+      "target": "project"
     },
     "Google.Protobuf": "3.0.0-beta3"
   },
diff --git a/src/csharp/Grpc.HealthCheck.Tests/project.json b/src/csharp/Grpc.HealthCheck.Tests/project.json
index fde21f1b7e0..9b28d2b4ba0 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/project.json
+++ b/src/csharp/Grpc.HealthCheck.Tests/project.json
@@ -11,8 +11,7 @@
   },
   "dependencies": {
     "Grpc.HealthCheck": {
-      "version": "0.0.1",
-      "taget": "project"
+      "target": "project"
     },
     "NUnit": "3.2.0",
     "NUnitLite": "3.2.0-*"
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/project.json b/src/csharp/Grpc.IntegrationTesting.Client/project.json
index a5a87f9882d..d8e47b1169b 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Client/project.json
@@ -11,8 +11,7 @@
   },
   "dependencies": {
     "Grpc.IntegrationTesting": {
-      "version": "1.0.0",
-      "taget": "project"
+      "target": "project"
     }
   },
   "frameworks": {
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
index a5a87f9882d..d8e47b1169b 100644
--- a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
@@ -11,8 +11,7 @@
   },
   "dependencies": {
     "Grpc.IntegrationTesting": {
-      "version": "1.0.0",
-      "taget": "project"
+      "target": "project"
     }
   },
   "frameworks": {
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/project.json b/src/csharp/Grpc.IntegrationTesting.Server/project.json
index a5a87f9882d..d8e47b1169b 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Server/project.json
@@ -11,8 +11,7 @@
   },
   "dependencies": {
     "Grpc.IntegrationTesting": {
-      "version": "1.0.0",
-      "taget": "project"
+      "target": "project"
     }
   },
   "frameworks": {
diff --git a/src/csharp/Grpc.IntegrationTesting.StressClient/project.json b/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
new file mode 100644
index 00000000000..d8e47b1169b
--- /dev/null
+++ b/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
@@ -0,0 +1,32 @@
+{
+  "buildOptions": {
+    "compile": "**/*.cs",
+    "copyToOutput": {
+      "mappings": {
+        "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+        "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll"
+      }
+    },
+    "emitEntryPoint": true
+  },
+  "dependencies": {
+    "Grpc.IntegrationTesting": {
+      "target": "project"
+    }
+  },
+  "frameworks": {
+    "net45": { },
+    "netstandard1.5": {
+      "imports": [
+        "portable-net45",
+        "net45"
+      ],
+      "dependencies": {
+        "NETStandard.Library": "1.5.0-rc2-24027"
+      }
+    }
+  },
+  "runtimes": {
+    "win7-x64": { }
+  }
+}
diff --git a/src/csharp/Grpc.IntegrationTesting/project.json b/src/csharp/Grpc.IntegrationTesting/project.json
index 6c1d31b3c45..8964dcc1970 100644
--- a/src/csharp/Grpc.IntegrationTesting/project.json
+++ b/src/csharp/Grpc.IntegrationTesting/project.json
@@ -12,12 +12,10 @@
   },
   "dependencies": {
     "Grpc.Auth": {
-      "version": "0.0.1",
-      "taget": "project"
+      "target": "project"
     },
     "Grpc.Core": {
-      "version": "0.0.1",
-      "taget": "project"
+      "target": "project"
     },
     "Google.Protobuf": "3.0.0-beta3",
     "CommandLineParser": "1.9.71",

From 39ec1cbd7aed31ad1ce95cd263dff5f28d15fe1a Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Fri, 17 Jun 2016 10:00:43 -0700
Subject: [PATCH 091/280] add csharp CoreCLR docker image

---
 .../csharp_coreclr_x64/Dockerfile.template    | 38 +++++++++
 .../test/csharp_coreclr_x64/Dockerfile        | 82 +++++++++++++++++++
 2 files changed, 120 insertions(+)
 create mode 100644 templates/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile.template
 create mode 100644 tools/dockerfile/test/csharp_coreclr_x64/Dockerfile

diff --git a/templates/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile.template b/templates/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile.template
new file mode 100644
index 00000000000..35782d6665f
--- /dev/null
+++ b/templates/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile.template
@@ -0,0 +1,38 @@
+%YAML 1.2
+--- |
+  # Copyright 2015, Google Inc.
+  # All rights reserved.
+  #
+  # Redistribution and use in source and binary forms, with or without
+  # modification, are permitted provided that the following conditions are
+  # met:
+  #
+  #     * Redistributions of source code must retain the above copyright
+  # notice, this list of conditions and the following disclaimer.
+  #     * Redistributions in binary form must reproduce the above
+  # copyright notice, this list of conditions and the following disclaimer
+  # in the documentation and/or other materials provided with the
+  # distribution.
+  #     * Neither the name of Google Inc. nor the names of its
+  # contributors may be used to endorse or promote products derived from
+  # this software without specific prior written permission.
+  #
+  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+  # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+  # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+  # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+  # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+  # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+  # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+  # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+  # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  
+  FROM microsoft/dotnet:1.0.0-preview1
+  
+  <%include file="../../apt_get_basic.include"/>
+  <%include file="../../run_tests_addons.include"/>
+  # Define the default command.
+  CMD ["bash"]
+  
diff --git a/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile b/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile
new file mode 100644
index 00000000000..9dfc040d736
--- /dev/null
+++ b/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile
@@ -0,0 +1,82 @@
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+FROM microsoft/dotnet:1.0.0-preview1
+
+# Install Git and basic packages.
+RUN apt-get update && apt-get install -y \
+  autoconf \
+  autotools-dev \
+  build-essential \
+  bzip2 \
+  ccache \
+  curl \
+  gcc \
+  gcc-multilib \
+  git \
+  golang \
+  gyp \
+  lcov \
+  libc6 \
+  libc6-dbg \
+  libc6-dev \
+  libgtest-dev \
+  libtool \
+  make \
+  perl \
+  strace \
+  python-dev \
+  python-setuptools \
+  python-yaml \
+  telnet \
+  unzip \
+  wget \
+  zip && apt-get clean
+
+#================
+# Build profiling
+RUN apt-get update && apt-get install -y time && apt-get clean
+
+# Prepare ccache
+RUN ln -s /usr/bin/ccache /usr/local/bin/gcc
+RUN ln -s /usr/bin/ccache /usr/local/bin/g++
+RUN ln -s /usr/bin/ccache /usr/local/bin/cc
+RUN ln -s /usr/bin/ccache /usr/local/bin/c++
+RUN ln -s /usr/bin/ccache /usr/local/bin/clang
+RUN ln -s /usr/bin/ccache /usr/local/bin/clang++
+
+#======================
+# Zookeeper dependencies
+# TODO(jtattermusch): is zookeeper still needed?
+RUN apt-get install -y libzookeeper-mt-dev
+
+RUN mkdir /var/local/jenkins
+
+# Define the default command.
+CMD ["bash"]

From 099cbf84aad8da27fba9ee7cb698d8e2d5c01fd1 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Fri, 17 Jun 2016 16:58:11 -0700
Subject: [PATCH 092/280] add debian.8-x64 to the list of runtimes

---
 src/csharp/Grpc.Core.Tests/project.json                      | 3 ++-
 src/csharp/Grpc.Examples.MathClient/project.json             | 3 ++-
 src/csharp/Grpc.Examples.MathServer/project.json             | 3 ++-
 src/csharp/Grpc.Examples.Tests/project.json                  | 3 ++-
 src/csharp/Grpc.HealthCheck.Tests/project.json               | 3 ++-
 src/csharp/Grpc.IntegrationTesting.Client/project.json       | 3 ++-
 src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json    | 3 ++-
 src/csharp/Grpc.IntegrationTesting.Server/project.json       | 3 ++-
 src/csharp/Grpc.IntegrationTesting.StressClient/project.json | 3 ++-
 src/csharp/Grpc.IntegrationTesting/project.json              | 3 ++-
 10 files changed, 20 insertions(+), 10 deletions(-)

diff --git a/src/csharp/Grpc.Core.Tests/project.json b/src/csharp/Grpc.Core.Tests/project.json
index 13705a22227..a59e6390d9d 100644
--- a/src/csharp/Grpc.Core.Tests/project.json
+++ b/src/csharp/Grpc.Core.Tests/project.json
@@ -29,6 +29,7 @@
     }
   },
   "runtimes": {
-    "win7-x64": { }
+    "win7-x64": { },
+    "debian.8-x64": {}
   }
 }
diff --git a/src/csharp/Grpc.Examples.MathClient/project.json b/src/csharp/Grpc.Examples.MathClient/project.json
index be9e123ff8b..9c070c76ba5 100644
--- a/src/csharp/Grpc.Examples.MathClient/project.json
+++ b/src/csharp/Grpc.Examples.MathClient/project.json
@@ -26,6 +26,7 @@
     }
   },
   "runtimes": {
-    "win7-x64": { }
+    "win7-x64": { },
+    "debian.8-x64": {}
   }
 }
diff --git a/src/csharp/Grpc.Examples.MathServer/project.json b/src/csharp/Grpc.Examples.MathServer/project.json
index be9e123ff8b..9c070c76ba5 100644
--- a/src/csharp/Grpc.Examples.MathServer/project.json
+++ b/src/csharp/Grpc.Examples.MathServer/project.json
@@ -26,6 +26,7 @@
     }
   },
   "runtimes": {
-    "win7-x64": { }
+    "win7-x64": { },
+    "debian.8-x64": {}
   }
 }
diff --git a/src/csharp/Grpc.Examples.Tests/project.json b/src/csharp/Grpc.Examples.Tests/project.json
index 86f06a5aa9b..7dd938cfb16 100644
--- a/src/csharp/Grpc.Examples.Tests/project.json
+++ b/src/csharp/Grpc.Examples.Tests/project.json
@@ -28,6 +28,7 @@
     }
   },
   "runtimes": {
-    "win7-x64": { }
+    "win7-x64": { },
+    "debian.8-x64": {}
   }
 }
diff --git a/src/csharp/Grpc.HealthCheck.Tests/project.json b/src/csharp/Grpc.HealthCheck.Tests/project.json
index 9b28d2b4ba0..be2b3a0459f 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/project.json
+++ b/src/csharp/Grpc.HealthCheck.Tests/project.json
@@ -28,6 +28,7 @@
     }
   },
   "runtimes": {
-    "win7-x64": { }
+    "win7-x64": { },
+    "debian.8-x64": {}
   }
 }
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/project.json b/src/csharp/Grpc.IntegrationTesting.Client/project.json
index d8e47b1169b..fabf906a738 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Client/project.json
@@ -27,6 +27,7 @@
     }
   },
   "runtimes": {
-    "win7-x64": { }
+    "win7-x64": { },
+    "debian.8-x64": {}
   }
 }
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
index d8e47b1169b..fabf906a738 100644
--- a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
@@ -27,6 +27,7 @@
     }
   },
   "runtimes": {
-    "win7-x64": { }
+    "win7-x64": { },
+    "debian.8-x64": {}
   }
 }
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/project.json b/src/csharp/Grpc.IntegrationTesting.Server/project.json
index d8e47b1169b..fabf906a738 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Server/project.json
@@ -27,6 +27,7 @@
     }
   },
   "runtimes": {
-    "win7-x64": { }
+    "win7-x64": { },
+    "debian.8-x64": {}
   }
 }
diff --git a/src/csharp/Grpc.IntegrationTesting.StressClient/project.json b/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
index d8e47b1169b..fabf906a738 100644
--- a/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
@@ -27,6 +27,7 @@
     }
   },
   "runtimes": {
-    "win7-x64": { }
+    "win7-x64": { },
+    "debian.8-x64": {}
   }
 }
diff --git a/src/csharp/Grpc.IntegrationTesting/project.json b/src/csharp/Grpc.IntegrationTesting/project.json
index 8964dcc1970..d5ac6f108ba 100644
--- a/src/csharp/Grpc.IntegrationTesting/project.json
+++ b/src/csharp/Grpc.IntegrationTesting/project.json
@@ -44,6 +44,7 @@
     }
   },
   "runtimes": {
-    "win7-x64": { }
+    "win7-x64": { },
+    "debian.8-x64": {}
   }
 }

From 76511a5cb7b8e70ce43c36a152a69d64a4b92c9a Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Fri, 17 Jun 2016 14:00:57 -0700
Subject: [PATCH 093/280] attempt for run_tests.py

---
 tools/run_tests/build_csharp_coreclr.sh | 38 ++++++++++++++++++++++
 tools/run_tests/run_tests.py            | 43 +++++++++++++++++++------
 2 files changed, 71 insertions(+), 10 deletions(-)
 create mode 100755 tools/run_tests/build_csharp_coreclr.sh

diff --git a/tools/run_tests/build_csharp_coreclr.sh b/tools/run_tests/build_csharp_coreclr.sh
new file mode 100755
index 00000000000..733b1a2083c
--- /dev/null
+++ b/tools/run_tests/build_csharp_coreclr.sh
@@ -0,0 +1,38 @@
+#!/bin/bash
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+set -ex
+
+cd $(dirname $0)/../../src/csharp
+
+# TODO(jtattermusch): introduce caching
+dotnet restore .
+
+dotnet build -f netstandard1.5 --configuration $MSBUILD_CONFIG '**/project.json'
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 3080d19c8d1..473eb460b46 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -504,7 +504,14 @@ class CSharpLanguage(object):
       self._make_options = [_windows_toolset_option(self.args.compiler),
                             _windows_arch_option(self.args.arch)]
     else:
-      _check_compiler(self.args.compiler, ['default'])
+      if self.platform == 'linux':
+        if self.args.compiler == 'coreclr':
+          self._docker_distro = 'coreclr'
+        else:
+          self._docker_distro = 'jessie'
+      else:
+        _check_compiler(self.args.compiler, ['default'])
+
       if self.platform == 'mac':
         # On Mac, official distribution of mono is 32bit.
         # TODO(jtattermusch): EMBED_ZLIB=true currently breaks the mac build
@@ -521,14 +528,25 @@ class CSharpLanguage(object):
     nunit_args = ['--labels=All',
                   '--noresult',
                   '--workers=1']
-    if self.platform == 'windows':
+    assembly_subdir = 'bin/%s' % msbuild_config
+    assembly_extension = '.exe'
+
+    if self.args.compiler == 'coreclr':
+      # TODO(jtattermusch): make the runtime string platform-specific
+      assembly_subdir += '/netstandard1.5/debian.8-x64'
+      assembly_extension = ''
+      runtime_cmd = []
+    elif self.platform == 'windows':
       runtime_cmd = []
     else:
       runtime_cmd = ['mono']
 
     specs = []
     for assembly in tests_by_assembly.iterkeys():
-      assembly_file = 'src/csharp/%s/bin/%s/%s.exe' % (assembly, msbuild_config, assembly)
+      assembly_file = 'src/csharp/%s/%s/%s%s' % (assembly,
+                                                 assembly_subdir,
+                                                 assembly,
+                                                 assembly_extension)
       if self.config.build_config != 'gcov' or self.platform != 'windows':
         # normally, run each test as a separate process
         for test in tests_by_assembly[assembly]:
@@ -571,12 +589,15 @@ class CSharpLanguage(object):
     return self._make_options;
 
   def build_steps(self):
-    if self.platform == 'windows':
-      return [[_windows_build_bat(self.args.compiler),
-               'src/csharp/Grpc.sln',
-               '/p:Configuration=%s' % _MSBUILD_CONFIG[self.config.build_config]]]
+    if self.args.compiler == 'coreclr':
+      return [['tools/run_tests/build_csharp_coreclr.sh']]
     else:
-      return [['tools/run_tests/build_csharp.sh']]
+      if self.platform == 'windows':
+        return [[_windows_build_bat(self.args.compiler),
+                 'src/csharp/Grpc.sln',
+                 '/p:Configuration=%s' % _MSBUILD_CONFIG[self.config.build_config]]]
+      else:
+        return [['tools/run_tests/build_csharp.sh']]
 
   def post_tests_steps(self):
     if self.platform == 'windows':
@@ -588,7 +609,8 @@ class CSharpLanguage(object):
     return 'Makefile'
 
   def dockerfile_dir(self):
-    return 'tools/dockerfile/test/csharp_jessie_%s' % _docker_arch_suffix(self.args.arch)
+    return 'tools/dockerfile/test/csharp_%s_%s' % (self._docker_distro,
+                                                   _docker_arch_suffix(self.args.arch))
 
   def __str__(self):
     return 'csharp'
@@ -838,7 +860,8 @@ argp.add_argument('--compiler',
                            'clang3.4', 'clang3.5', 'clang3.6', 'clang3.7',
                            'vs2010', 'vs2013', 'vs2015',
                            'python2.7', 'python3.4',
-                           'node0.12', 'node4', 'node5'],
+                           'node0.12', 'node4', 'node5',
+                           'coreclr'],
                   default='default',
                   help='Selects compiler to use. Allowed values depend on the platform and language.')
 argp.add_argument('--build_only',

From e5f0f95101b40e00f3f7147d18514dbedf81d5a2 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Fri, 17 Jun 2016 18:56:55 -0700
Subject: [PATCH 094/280] fixed syntax errors in proto

---
 src/proto/grpc/binary_log/v1alpha/log.proto | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/proto/grpc/binary_log/v1alpha/log.proto b/src/proto/grpc/binary_log/v1alpha/log.proto
index 83166cd4104..46656109bc9 100644
--- a/src/proto/grpc/binary_log/v1alpha/log.proto
+++ b/src/proto/grpc/binary_log/v1alpha/log.proto
@@ -29,20 +29,20 @@
 
 syntax = "proto3";
 
-import "google/protobuf/timestamp.proto"
+import "google/protobuf/timestamp.proto";
 
 package grpc.binary_log.v1alpha;
 
 enum Direction {
-  SERVER_SEND;
-  SERVER_RECV;
-  CLIENT_SEND;
-  CLIENT_RECV;
+  SERVER_SEND = 0;
+  SERVER_RECV = 1;
+  CLIENT_SEND = 2;
+  CLIENT_RECV = 3;
 }
 
 message KeyValuePair {
-  string key;
-  string value;
+  string key = 1;
+  string value = 2;
 }
 
 // Any sort of metadata that may be sent in either direction during a call

From 377bfdef920ef36ab53f409f7037f3f683020f9f Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Fri, 17 Jun 2016 18:17:47 -0700
Subject: [PATCH 095/280] added extra path to python protoc

---
 src/python/grpcio/commands.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/python/grpcio/commands.py b/src/python/grpcio/commands.py
index 3e974eba0a3..7f9c292d659 100644
--- a/src/python/grpcio/commands.py
+++ b/src/python/grpcio/commands.py
@@ -182,6 +182,8 @@ class BuildProtoModules(setuptools.Command):
           '--plugin=protoc-gen-python-grpc={}'.format(
               self.grpc_python_plugin_command),
           '-I {}'.format(GRPC_STEM),
+          '-I .'.format(GRPC_STEM),
+          '-I {}/third_party/protobuf/src'.format(GRPC_STEM),
           '--python_out={}'.format(PROTO_GEN_STEM),
           '--python-grpc_out={}'.format(PROTO_GEN_STEM),
       ] + [path]

From 5ad70a6953635da45542d1b3cb93672e6b51ae64 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Fri, 17 Jun 2016 19:03:10 -0700
Subject: [PATCH 096/280] removed spurious .format()

---
 src/python/grpcio/commands.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/python/grpcio/commands.py b/src/python/grpcio/commands.py
index 7f9c292d659..f498ed41901 100644
--- a/src/python/grpcio/commands.py
+++ b/src/python/grpcio/commands.py
@@ -182,7 +182,7 @@ class BuildProtoModules(setuptools.Command):
           '--plugin=protoc-gen-python-grpc={}'.format(
               self.grpc_python_plugin_command),
           '-I {}'.format(GRPC_STEM),
-          '-I .'.format(GRPC_STEM),
+          '-I .',
           '-I {}/third_party/protobuf/src'.format(GRPC_STEM),
           '--python_out={}'.format(PROTO_GEN_STEM),
           '--python-grpc_out={}'.format(PROTO_GEN_STEM),

From 78a73333b705a9d184da7f3174533500d05b2a21 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Mon, 20 Jun 2016 08:24:44 -0700
Subject: [PATCH 097/280] Fix memory leak upon receiving two RST_STREAMs

---
 .../chttp2/transport/frame_rst_stream.c       |  14 +-
 .../2c452818a10ddef09b90c89a53db14b9b56b21f3  | Bin 0 -> 52 bytes
 .../42ead79c94eccdf8a8c3d8036be73e14fa260dd5  | Bin 0 -> 64 bytes
 .../4e05d6cf1c3f0c04f6ee92d09a53ee0fe35c085a  | Bin 0 -> 64 bytes
 .../8f980dd25f1c77e3536131c2c620aa32e8c13180  | Bin 0 -> 14 bytes
 .../aef36c49d7dec0dcf8cdc224d9e9221fa2cb1db0  | Bin 0 -> 53 bytes
 ...h-14ed70cd9ea7987cdd0c8f6e39398ee7c60ee2ff | Bin 0 -> 719 bytes
 .../dcb06a6e34cbed15515e5b3581ca666f704777bd  | Bin 0 -> 238 bytes
 .../ea46b684f1e67a27c231f2d536c41da631189b9c  | Bin 0 -> 696 bytes
 tools/run_tests/tests.json                    | 152 ++++++++++++++++++
 10 files changed, 160 insertions(+), 6 deletions(-)
 create mode 100644 test/core/end2end/fuzzers/client_fuzzer_corpus/2c452818a10ddef09b90c89a53db14b9b56b21f3
 create mode 100644 test/core/end2end/fuzzers/client_fuzzer_corpus/42ead79c94eccdf8a8c3d8036be73e14fa260dd5
 create mode 100644 test/core/end2end/fuzzers/client_fuzzer_corpus/4e05d6cf1c3f0c04f6ee92d09a53ee0fe35c085a
 create mode 100644 test/core/end2end/fuzzers/client_fuzzer_corpus/8f980dd25f1c77e3536131c2c620aa32e8c13180
 create mode 100644 test/core/end2end/fuzzers/client_fuzzer_corpus/aef36c49d7dec0dcf8cdc224d9e9221fa2cb1db0
 create mode 100644 test/core/end2end/fuzzers/client_fuzzer_corpus/crash-14ed70cd9ea7987cdd0c8f6e39398ee7c60ee2ff
 create mode 100644 test/core/end2end/fuzzers/client_fuzzer_corpus/dcb06a6e34cbed15515e5b3581ca666f704777bd
 create mode 100644 test/core/end2end/fuzzers/client_fuzzer_corpus/ea46b684f1e67a27c231f2d536c41da631189b9c

diff --git a/src/core/ext/transport/chttp2/transport/frame_rst_stream.c b/src/core/ext/transport/chttp2/transport/frame_rst_stream.c
index a7aefb99158..e3a3c9e4a7c 100644
--- a/src/core/ext/transport/chttp2/transport/frame_rst_stream.c
+++ b/src/core/ext/transport/chttp2/transport/frame_rst_stream.c
@@ -102,12 +102,14 @@ grpc_error *grpc_chttp2_rst_stream_parser_parse(
   if (p->byte == 4) {
     GPR_ASSERT(is_last);
     stream_parsing->received_close = 1;
-    stream_parsing->forced_close_error = grpc_error_set_int(
-        GRPC_ERROR_CREATE("RST_STREAM"), GRPC_ERROR_INT_HTTP2_ERROR,
-        (intptr_t)((((uint32_t)p->reason_bytes[0]) << 24) |
-                   (((uint32_t)p->reason_bytes[1]) << 16) |
-                   (((uint32_t)p->reason_bytes[2]) << 8) |
-                   (((uint32_t)p->reason_bytes[3]))));
+    if (stream_parsing->forced_close_error == GRPC_ERROR_NONE) {
+      stream_parsing->forced_close_error = grpc_error_set_int(
+          GRPC_ERROR_CREATE("RST_STREAM"), GRPC_ERROR_INT_HTTP2_ERROR,
+          (intptr_t)((((uint32_t)p->reason_bytes[0]) << 24) |
+                     (((uint32_t)p->reason_bytes[1]) << 16) |
+                     (((uint32_t)p->reason_bytes[2]) << 8) |
+                     (((uint32_t)p->reason_bytes[3]))));
+    }
   }
 
   return GRPC_ERROR_NONE;
diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/2c452818a10ddef09b90c89a53db14b9b56b21f3 b/test/core/end2end/fuzzers/client_fuzzer_corpus/2c452818a10ddef09b90c89a53db14b9b56b21f3
new file mode 100644
index 0000000000000000000000000000000000000000..059634fda10a679b7bb4f753fe06660888b26dd4
GIT binary patch
literal 52
zcmZS3WMpJ#`1c<K?*C_CU}4PGU;qLTpNZkWVs0+yM8BzwniKv0`>Cr>)SNic&kq1P
C_Z2e$

literal 0
HcmV?d00001

diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/42ead79c94eccdf8a8c3d8036be73e14fa260dd5 b/test/core/end2end/fuzzers/client_fuzzer_corpus/42ead79c94eccdf8a8c3d8036be73e14fa260dd5
new file mode 100644
index 0000000000000000000000000000000000000000..b9c53b26edd94105bc4bdb24e73697cc4be93dc4
GIT binary patch
literal 64
zcmZQz&|+j^U|?Wm;7KnkNY*XM%uUTNE#U@pic1npN{a=Jfbu+y3``8!3=GU5r40Z7
LGqQs;X{`VNxT6g}

literal 0
HcmV?d00001

diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/4e05d6cf1c3f0c04f6ee92d09a53ee0fe35c085a b/test/core/end2end/fuzzers/client_fuzzer_corpus/4e05d6cf1c3f0c04f6ee92d09a53ee0fe35c085a
new file mode 100644
index 0000000000000000000000000000000000000000..8a4a279998d72b2aa9b94310364f40c2580515c2
GIT binary patch
literal 64
zcmZQz&|+j^U|?Wm;7KnkNY*XM%uUTNE#X!Naf(Y4OG=9cjeznzj0{W+*$fQKAf*id
M|1+|KG-<5>0Is79{{R30

literal 0
HcmV?d00001

diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/8f980dd25f1c77e3536131c2c620aa32e8c13180 b/test/core/end2end/fuzzers/client_fuzzer_corpus/8f980dd25f1c77e3536131c2c620aa32e8c13180
new file mode 100644
index 0000000000000000000000000000000000000000..fcebab7a64f25b8dfad2cbb19851b76833a674b7
GIT binary patch
literal 14
TcmZS3WMpJ#`1c<K?*9h>CKLz?

literal 0
HcmV?d00001

diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/aef36c49d7dec0dcf8cdc224d9e9221fa2cb1db0 b/test/core/end2end/fuzzers/client_fuzzer_corpus/aef36c49d7dec0dcf8cdc224d9e9221fa2cb1db0
new file mode 100644
index 0000000000000000000000000000000000000000..6b015fe66e6131d746ff41da4b961b0ea074a02f
GIT binary patch
literal 53
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literal 0
HcmV?d00001

diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/crash-14ed70cd9ea7987cdd0c8f6e39398ee7c60ee2ff b/test/core/end2end/fuzzers/client_fuzzer_corpus/crash-14ed70cd9ea7987cdd0c8f6e39398ee7c60ee2ff
new file mode 100644
index 0000000000000000000000000000000000000000..be6366049d93b585d80d625c72ec8eabc458f8f5
GIT binary patch
literal 719
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literal 0
HcmV?d00001

diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/dcb06a6e34cbed15515e5b3581ca666f704777bd b/test/core/end2end/fuzzers/client_fuzzer_corpus/dcb06a6e34cbed15515e5b3581ca666f704777bd
new file mode 100644
index 0000000000000000000000000000000000000000..92750f94a32152bdd71d388f47c4bcefb6ec34b8
GIT binary patch
literal 238
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literal 0
HcmV?d00001

diff --git a/test/core/end2end/fuzzers/client_fuzzer_corpus/ea46b684f1e67a27c231f2d536c41da631189b9c b/test/core/end2end/fuzzers/client_fuzzer_corpus/ea46b684f1e67a27c231f2d536c41da631189b9c
new file mode 100644
index 0000000000000000000000000000000000000000..c891d9adc8d1254cc043625d2fd9e424618666a0
GIT binary patch
literal 696
zcmcJMF;2r!42FL<0SdQp7}8YY0`0^Fd;kU{KvBiu4h^s&aRcNbVniLeL~jNUI}M}=
zBqSuBqR7vF_HTbiMFiwofjEQ%;5dwo{hxa%oT{vRR1{bBvbk+eF0YsSO})CSPgiec
zB5BRolue|xYWm{0xstULD+O5FM|ck+G6FUrWo}7Dw~351@Js}cK<TB}qKqrEj=@H(
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o4-v0C#t0){Z=6m|-N-+eun0W93o~cbV+vGj(5A~7+}Qfx0kNN|?f?J)

literal 0
HcmV?d00001

diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index 3ed7a6bc476..2353ac85831 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -54188,6 +54188,25 @@
     ], 
     "uses_polling": false
   }, 
+  {
+    "args": [
+      "test/core/end2end/fuzzers/client_fuzzer_corpus/2c452818a10ddef09b90c89a53db14b9b56b21f3"
+    ], 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [
+      "tsan"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "client_fuzzer_one_entry", 
+    "platforms": [
+      "linux"
+    ], 
+    "uses_polling": false
+  }, 
   {
     "args": [
       "test/core/end2end/fuzzers/client_fuzzer_corpus/2c6e69067c68c145dc5d3a60b86d8081fdf95d0d"
@@ -54986,6 +55005,25 @@
     ], 
     "uses_polling": false
   }, 
+  {
+    "args": [
+      "test/core/end2end/fuzzers/client_fuzzer_corpus/42ead79c94eccdf8a8c3d8036be73e14fa260dd5"
+    ], 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [
+      "tsan"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "client_fuzzer_one_entry", 
+    "platforms": [
+      "linux"
+    ], 
+    "uses_polling": false
+  }, 
   {
     "args": [
       "test/core/end2end/fuzzers/client_fuzzer_corpus/43202ad9b1a689d919ab9ae91c2d0223394867bf"
@@ -55328,6 +55366,25 @@
     ], 
     "uses_polling": false
   }, 
+  {
+    "args": [
+      "test/core/end2end/fuzzers/client_fuzzer_corpus/4e05d6cf1c3f0c04f6ee92d09a53ee0fe35c085a"
+    ], 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [
+      "tsan"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "client_fuzzer_one_entry", 
+    "platforms": [
+      "linux"
+    ], 
+    "uses_polling": false
+  }, 
   {
     "args": [
       "test/core/end2end/fuzzers/client_fuzzer_corpus/4e21c4b5c454df51c102f09ea1ba78c42133ee16"
@@ -57247,6 +57304,25 @@
     ], 
     "uses_polling": false
   }, 
+  {
+    "args": [
+      "test/core/end2end/fuzzers/client_fuzzer_corpus/8f980dd25f1c77e3536131c2c620aa32e8c13180"
+    ], 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [
+      "tsan"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "client_fuzzer_one_entry", 
+    "platforms": [
+      "linux"
+    ], 
+    "uses_polling": false
+  }, 
   {
     "args": [
       "test/core/end2end/fuzzers/client_fuzzer_corpus/90a9c3390752b94ca19a58cb2fe6267bc818f718"
@@ -58463,6 +58539,25 @@
     ], 
     "uses_polling": false
   }, 
+  {
+    "args": [
+      "test/core/end2end/fuzzers/client_fuzzer_corpus/aef36c49d7dec0dcf8cdc224d9e9221fa2cb1db0"
+    ], 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [
+      "tsan"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "client_fuzzer_one_entry", 
+    "platforms": [
+      "linux"
+    ], 
+    "uses_polling": false
+  }, 
   {
     "args": [
       "test/core/end2end/fuzzers/client_fuzzer_corpus/af8b24ffaecdfaf96c0cd7c76f31dc9e1b4d0935"
@@ -59508,6 +59603,25 @@
     ], 
     "uses_polling": false
   }, 
+  {
+    "args": [
+      "test/core/end2end/fuzzers/client_fuzzer_corpus/crash-14ed70cd9ea7987cdd0c8f6e39398ee7c60ee2ff"
+    ], 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [
+      "tsan"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "client_fuzzer_one_entry", 
+    "platforms": [
+      "linux"
+    ], 
+    "uses_polling": false
+  }, 
   {
     "args": [
       "test/core/end2end/fuzzers/client_fuzzer_corpus/crash-3bd02c98286bfa7be8e13c5500ddb587bba74fbb"
@@ -60173,6 +60287,25 @@
     ], 
     "uses_polling": false
   }, 
+  {
+    "args": [
+      "test/core/end2end/fuzzers/client_fuzzer_corpus/dcb06a6e34cbed15515e5b3581ca666f704777bd"
+    ], 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [
+      "tsan"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "client_fuzzer_one_entry", 
+    "platforms": [
+      "linux"
+    ], 
+    "uses_polling": false
+  }, 
   {
     "args": [
       "test/core/end2end/fuzzers/client_fuzzer_corpus/dccd1fd6d3394f5f68c87950ed7356a2e9ef0f6f"
@@ -60667,6 +60800,25 @@
     ], 
     "uses_polling": false
   }, 
+  {
+    "args": [
+      "test/core/end2end/fuzzers/client_fuzzer_corpus/ea46b684f1e67a27c231f2d536c41da631189b9c"
+    ], 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [
+      "tsan"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "client_fuzzer_one_entry", 
+    "platforms": [
+      "linux"
+    ], 
+    "uses_polling": false
+  }, 
   {
     "args": [
       "test/core/end2end/fuzzers/client_fuzzer_corpus/eb969b9ab1b0d6b5d197795223ba7a091ebd8460"

From 56565fca7532fcc559cd8149e437eb0a7ecdfd9b Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Mon, 20 Jun 2016 08:36:53 -0700
Subject: [PATCH 098/280] Force receiving a SETTINGS frame as the first frame

---
 .../ext/transport/chttp2/transport/chttp2_transport.c |  3 ++-
 src/core/ext/transport/chttp2/transport/internal.h    |  1 +
 src/core/ext/transport/chttp2/transport/parsing.c     | 11 +++++++++++
 3 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.c b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
index 9aa39ba26c2..a8c4b271fe1 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.c
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
@@ -264,6 +264,7 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
   t->parsing.is_client = is_client;
   t->parsing.deframe_state =
       is_client ? GRPC_DTS_FH_0 : GRPC_DTS_CLIENT_PREFIX_0;
+  t->parsing.is_first_frame = true;
   t->writing.is_client = is_client;
   t->optional_drop_message = gpr_empty_slice();
   grpc_connectivity_state_init(
@@ -1805,7 +1806,7 @@ static void post_reading_action_locked(grpc_exec_ctx *exec_ctx,
     UNREF_TRANSPORT(exec_ctx, t, "reading_action");
   }
 
-  GRPC_ERROR_UNREF(error);
+  GRPC_LOG_IF_ERROR("close_transport", error);
 }
 
 /*******************************************************************************
diff --git a/src/core/ext/transport/chttp2/transport/internal.h b/src/core/ext/transport/chttp2/transport/internal.h
index 54e72ebd249..64385b43724 100644
--- a/src/core/ext/transport/chttp2/transport/internal.h
+++ b/src/core/ext/transport/chttp2/transport/internal.h
@@ -265,6 +265,7 @@ struct grpc_chttp2_transport_parsing {
   uint8_t incoming_frame_type;
   uint8_t incoming_frame_flags;
   uint8_t header_eof;
+  bool is_first_frame;
   uint32_t expect_continuation_stream_id;
   uint32_t incoming_frame_size;
   uint32_t incoming_stream_id;
diff --git a/src/core/ext/transport/chttp2/transport/parsing.c b/src/core/ext/transport/chttp2/transport/parsing.c
index 785134091f5..991d7729af4 100644
--- a/src/core/ext/transport/chttp2/transport/parsing.c
+++ b/src/core/ext/transport/chttp2/transport/parsing.c
@@ -468,6 +468,17 @@ grpc_error *grpc_chttp2_perform_read(
 
 static grpc_error *init_frame_parser(
     grpc_exec_ctx *exec_ctx, grpc_chttp2_transport_parsing *transport_parsing) {
+  if (transport_parsing->is_first_frame &&
+      transport_parsing->incoming_frame_type != GRPC_CHTTP2_FRAME_SETTINGS) {
+    char *msg;
+    gpr_asprintf(
+        &msg, "Expected SETTINGS frame as the first frame, got frame type %d",
+        transport_parsing->incoming_frame_type);
+    grpc_error *err = GRPC_ERROR_CREATE(msg);
+    gpr_free(msg);
+    return err;
+  }
+  transport_parsing->is_first_frame = false;
   if (transport_parsing->expect_continuation_stream_id != 0) {
     if (transport_parsing->incoming_frame_type !=
         GRPC_CHTTP2_FRAME_CONTINUATION) {

From b187895fc43a84d75b64aa58d21d5caf9b80ba61 Mon Sep 17 00:00:00 2001
From: Craig Tiller <craig.tiller@gmail.com>
Date: Mon, 20 Jun 2016 09:11:54 -0700
Subject: [PATCH 099/280] Fix windows build error

---
 src/core/lib/iomgr/tcp_server_windows.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/core/lib/iomgr/tcp_server_windows.c b/src/core/lib/iomgr/tcp_server_windows.c
index 2a51671ec71..4604f56dac7 100644
--- a/src/core/lib/iomgr/tcp_server_windows.c
+++ b/src/core/lib/iomgr/tcp_server_windows.c
@@ -103,6 +103,7 @@ struct grpc_tcp_server {
 /* Public function. Allocates the proper data structures to hold a
    grpc_tcp_server. */
 grpc_error *grpc_tcp_server_create(grpc_closure *shutdown_complete,
+                                   const grpc_channel_args *args,
                                    grpc_tcp_server **server) {
   grpc_tcp_server *s = gpr_malloc(sizeof(grpc_tcp_server));
   gpr_ref_init(&s->refs, 1);

From daec5f94d2805db094cd748dbb691e25185af3c6 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Mon, 20 Jun 2016 09:24:45 -0700
Subject: [PATCH 100/280] We dont need to account for parsing or not when
 writing

---
 src/core/ext/transport/chttp2/transport/chttp2_transport.c | 3 +--
 src/core/ext/transport/chttp2/transport/internal.h         | 3 +--
 src/core/ext/transport/chttp2/transport/writing.c          | 4 ++--
 3 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.c b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
index a8c4b271fe1..4eb5ba8270e 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.c
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
@@ -644,8 +644,7 @@ static void finish_global_actions(grpc_exec_ctx *exec_ctx,
 
   for (;;) {
     if (!t->executor.writing_active && !t->closed &&
-        grpc_chttp2_unlocking_check_writes(exec_ctx, &t->global, &t->writing,
-                                           t->executor.parsing_active)) {
+        grpc_chttp2_unlocking_check_writes(exec_ctx, &t->global, &t->writing)) {
       t->executor.writing_active = 1;
       REF_TRANSPORT(t, "writing");
       prevent_endpoint_shutdown(t);
diff --git a/src/core/ext/transport/chttp2/transport/internal.h b/src/core/ext/transport/chttp2/transport/internal.h
index 64385b43724..909c406f8a8 100644
--- a/src/core/ext/transport/chttp2/transport/internal.h
+++ b/src/core/ext/transport/chttp2/transport/internal.h
@@ -525,8 +525,7 @@ struct grpc_chttp2_stream {
     are required, and schedule them if so */
 int grpc_chttp2_unlocking_check_writes(grpc_exec_ctx *exec_ctx,
                                        grpc_chttp2_transport_global *global,
-                                       grpc_chttp2_transport_writing *writing,
-                                       int is_parsing);
+                                       grpc_chttp2_transport_writing *writing);
 void grpc_chttp2_perform_writes(
     grpc_exec_ctx *exec_ctx, grpc_chttp2_transport_writing *transport_writing,
     grpc_endpoint *endpoint);
diff --git a/src/core/ext/transport/chttp2/transport/writing.c b/src/core/ext/transport/chttp2/transport/writing.c
index add76781827..b19f5f068df 100644
--- a/src/core/ext/transport/chttp2/transport/writing.c
+++ b/src/core/ext/transport/chttp2/transport/writing.c
@@ -45,7 +45,7 @@ static void finalize_outbuf(grpc_exec_ctx *exec_ctx,
 
 int grpc_chttp2_unlocking_check_writes(
     grpc_exec_ctx *exec_ctx, grpc_chttp2_transport_global *transport_global,
-    grpc_chttp2_transport_writing *transport_writing, int is_parsing) {
+    grpc_chttp2_transport_writing *transport_writing) {
   grpc_chttp2_stream_global *stream_global;
   grpc_chttp2_stream_writing *stream_writing;
 
@@ -61,7 +61,7 @@ int grpc_chttp2_unlocking_check_writes(
                                 [GRPC_CHTTP2_SETTINGS_HEADER_TABLE_SIZE]);
 
   if (transport_global->dirtied_local_settings &&
-      !transport_global->sent_local_settings && !is_parsing) {
+      !transport_global->sent_local_settings) {
     gpr_slice_buffer_add(
         &transport_writing->outbuf,
         grpc_chttp2_settings_create(

From 04e47f308ec57c42ec9a0dcdc25e72c03b66bc9e Mon Sep 17 00:00:00 2001
From: murgatroid99 <mlumish@google.com>
Date: Mon, 20 Jun 2016 11:03:15 -0700
Subject: [PATCH 101/280] Direct additional log statement through custom logger

---
 src/node/src/server.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/node/src/server.js b/src/node/src/server.js
index fd5153f1244..b3b414969ab 100644
--- a/src/node/src/server.js
+++ b/src/node/src/server.js
@@ -735,8 +735,8 @@ Server.prototype.addService = function(service, implementation) {
     }
     var impl;
     if (implementation[name] === undefined) {
-      console.warn('Method handler for %s expected but not provided',
-                   attrs.path);
+      common.log(grpc.logVerbosity.ERROR, 'Method handler for ' +
+          attrs.path + ' expected but not provided');
       impl = defaultHandler[method_type];
     } else {
       impl = _.bind(implementation[name], implementation);

From fa1f74e2267d8dfe97d617357033d2a0bf8423be Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Mon, 20 Jun 2016 11:11:44 -0700
Subject: [PATCH 102/280] Fix errored streams prematurely terminating, add a
 test

---
 Makefile                                      |   2 +
 .../chttp2/transport/chttp2_transport.c       |   4 +-
 .../ext/transport/chttp2/transport/internal.h |   1 +
 test/core/end2end/end2end_nosec_tests.c       |   8 +
 test/core/end2end/end2end_tests.c             |   8 +
 test/core/end2end/gen_build_yaml.py           |   1 +
 .../end2end/tests/streaming_error_response.c  | 278 ++++++++
 tools/run_tests/sources_and_headers.json      |   2 +
 tools/run_tests/tests.json                    | 629 +++++++++++++++++-
 .../end2end_nosec_tests.vcxproj               |   2 +
 .../end2end_nosec_tests.vcxproj.filters       |   3 +
 .../tests/end2end_tests/end2end_tests.vcxproj |   2 +
 .../end2end_tests.vcxproj.filters             |   3 +
 13 files changed, 932 insertions(+), 11 deletions(-)
 create mode 100644 test/core/end2end/tests/streaming_error_response.c

diff --git a/Makefile b/Makefile
index 13bc2f1871c..23e40cfb075 100644
--- a/Makefile
+++ b/Makefile
@@ -6389,6 +6389,7 @@ LIBEND2END_TESTS_SRC = \
     test/core/end2end/tests/simple_delayed_request.c \
     test/core/end2end/tests/simple_metadata.c \
     test/core/end2end/tests/simple_request.c \
+    test/core/end2end/tests/streaming_error_response.c \
     test/core/end2end/tests/trailing_metadata.c \
 
 PUBLIC_HEADERS_C += \
@@ -6465,6 +6466,7 @@ LIBEND2END_NOSEC_TESTS_SRC = \
     test/core/end2end/tests/simple_delayed_request.c \
     test/core/end2end/tests/simple_metadata.c \
     test/core/end2end/tests/simple_request.c \
+    test/core/end2end/tests/streaming_error_response.c \
     test/core/end2end/tests/trailing_metadata.c \
 
 PUBLIC_HEADERS_C += \
diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.c b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
index 9aa39ba26c2..63d07108a7c 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.c
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
@@ -1093,6 +1093,7 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx,
     stream_global->recv_trailing_metadata_finished =
         add_closure_barrier(on_complete);
     stream_global->recv_trailing_metadata = op->recv_trailing_metadata;
+    stream_global->final_metadata_requested = true;
     grpc_chttp2_list_add_check_read_ops(transport_global, stream_global);
   }
 
@@ -1246,7 +1247,8 @@ static void check_read_ops(grpc_exec_ctx *exec_ctx,
       stream_global->recv_initial_metadata_ready = NULL;
     }
     if (stream_global->recv_message_ready != NULL) {
-      while (stream_global->seen_error &&
+      while (stream_global->final_metadata_requested &&
+             stream_global->seen_error &&
              (bs = grpc_chttp2_incoming_frame_queue_pop(
                   &stream_global->incoming_frames)) != NULL) {
         incoming_byte_stream_destroy_locked(exec_ctx, NULL, NULL, bs);
diff --git a/src/core/ext/transport/chttp2/transport/internal.h b/src/core/ext/transport/chttp2/transport/internal.h
index 54e72ebd249..48602fb47ce 100644
--- a/src/core/ext/transport/chttp2/transport/internal.h
+++ b/src/core/ext/transport/chttp2/transport/internal.h
@@ -440,6 +440,7 @@ typedef struct {
 
   bool published_initial_metadata;
   bool published_trailing_metadata;
+  bool final_metadata_requested;
 
   grpc_chttp2_incoming_metadata_buffer received_initial_metadata;
   grpc_chttp2_incoming_metadata_buffer received_trailing_metadata;
diff --git a/test/core/end2end/end2end_nosec_tests.c b/test/core/end2end/end2end_nosec_tests.c
index b71299c09e0..2893bddc43c 100644
--- a/test/core/end2end/end2end_nosec_tests.c
+++ b/test/core/end2end/end2end_nosec_tests.c
@@ -115,6 +115,8 @@ extern void simple_metadata(grpc_end2end_test_config config);
 extern void simple_metadata_pre_init(void);
 extern void simple_request(grpc_end2end_test_config config);
 extern void simple_request_pre_init(void);
+extern void streaming_error_response(grpc_end2end_test_config config);
+extern void streaming_error_response_pre_init(void);
 extern void trailing_metadata(grpc_end2end_test_config config);
 extern void trailing_metadata_pre_init(void);
 
@@ -157,6 +159,7 @@ void grpc_end2end_tests_pre_init(void) {
   simple_delayed_request_pre_init();
   simple_metadata_pre_init();
   simple_request_pre_init();
+  streaming_error_response_pre_init();
   trailing_metadata_pre_init();
 }
 
@@ -203,6 +206,7 @@ void grpc_end2end_tests(int argc, char **argv,
     simple_delayed_request(config);
     simple_metadata(config);
     simple_request(config);
+    streaming_error_response(config);
     trailing_metadata(config);
     return;
   }
@@ -352,6 +356,10 @@ void grpc_end2end_tests(int argc, char **argv,
       simple_request(config);
       continue;
     }
+    if (0 == strcmp("streaming_error_response", argv[i])) {
+      streaming_error_response(config);
+      continue;
+    }
     if (0 == strcmp("trailing_metadata", argv[i])) {
       trailing_metadata(config);
       continue;
diff --git a/test/core/end2end/end2end_tests.c b/test/core/end2end/end2end_tests.c
index 00c9c44a78c..96a38e76dcc 100644
--- a/test/core/end2end/end2end_tests.c
+++ b/test/core/end2end/end2end_tests.c
@@ -117,6 +117,8 @@ extern void simple_metadata(grpc_end2end_test_config config);
 extern void simple_metadata_pre_init(void);
 extern void simple_request(grpc_end2end_test_config config);
 extern void simple_request_pre_init(void);
+extern void streaming_error_response(grpc_end2end_test_config config);
+extern void streaming_error_response_pre_init(void);
 extern void trailing_metadata(grpc_end2end_test_config config);
 extern void trailing_metadata_pre_init(void);
 
@@ -160,6 +162,7 @@ void grpc_end2end_tests_pre_init(void) {
   simple_delayed_request_pre_init();
   simple_metadata_pre_init();
   simple_request_pre_init();
+  streaming_error_response_pre_init();
   trailing_metadata_pre_init();
 }
 
@@ -207,6 +210,7 @@ void grpc_end2end_tests(int argc, char **argv,
     simple_delayed_request(config);
     simple_metadata(config);
     simple_request(config);
+    streaming_error_response(config);
     trailing_metadata(config);
     return;
   }
@@ -360,6 +364,10 @@ void grpc_end2end_tests(int argc, char **argv,
       simple_request(config);
       continue;
     }
+    if (0 == strcmp("streaming_error_response", argv[i])) {
+      streaming_error_response(config);
+      continue;
+    }
     if (0 == strcmp("trailing_metadata", argv[i])) {
       trailing_metadata(config);
       continue;
diff --git a/test/core/end2end/gen_build_yaml.py b/test/core/end2end/gen_build_yaml.py
index 325d9b3cad0..6d3d8f8d3c4 100755
--- a/test/core/end2end/gen_build_yaml.py
+++ b/test/core/end2end/gen_build_yaml.py
@@ -126,6 +126,7 @@ END2END_TESTS = {
     'simple_delayed_request': connectivity_test_options,
     'simple_metadata': default_test_options,
     'simple_request': default_test_options,
+    'streaming_error_response': default_test_options,
     'trailing_metadata': default_test_options,
 }
 
diff --git a/test/core/end2end/tests/streaming_error_response.c b/test/core/end2end/tests/streaming_error_response.c
new file mode 100644
index 00000000000..c1d6f73ecdc
--- /dev/null
+++ b/test/core/end2end/tests/streaming_error_response.c
@@ -0,0 +1,278 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "test/core/end2end/end2end_tests.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#include <grpc/byte_buffer.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/time.h>
+#include <grpc/support/useful.h>
+#include "test/core/end2end/cq_verifier.h"
+
+enum { TIMEOUT = 200000 };
+
+static void *tag(intptr_t t) { return (void *)t; }
+
+static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
+                                            const char *test_name,
+                                            grpc_channel_args *client_args,
+                                            grpc_channel_args *server_args,
+                                            bool request_status_early) {
+  grpc_end2end_test_fixture f;
+  gpr_log(GPR_INFO, "%s/%s/request_status_early=%s", test_name, config.name,
+          request_status_early ? "true" : "false");
+  f = config.create_fixture(client_args, server_args);
+  config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
+  return f;
+}
+
+static gpr_timespec n_seconds_time(int n) {
+  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+}
+
+static gpr_timespec five_seconds_time(void) { return n_seconds_time(5); }
+
+static void drain_cq(grpc_completion_queue *cq) {
+  grpc_event ev;
+  do {
+    ev = grpc_completion_queue_next(cq, five_seconds_time(), NULL);
+  } while (ev.type != GRPC_QUEUE_SHUTDOWN);
+}
+
+static void shutdown_server(grpc_end2end_test_fixture *f) {
+  if (!f->server) return;
+  grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
+  GPR_ASSERT(grpc_completion_queue_pluck(
+                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 .type == GRPC_OP_COMPLETE);
+  grpc_server_destroy(f->server);
+  f->server = NULL;
+}
+
+static void shutdown_client(grpc_end2end_test_fixture *f) {
+  if (!f->client) return;
+  grpc_channel_destroy(f->client);
+  f->client = NULL;
+}
+
+static void end_test(grpc_end2end_test_fixture *f) {
+  shutdown_server(f);
+  shutdown_client(f);
+
+  grpc_completion_queue_shutdown(f->cq);
+  drain_cq(f->cq);
+  grpc_completion_queue_destroy(f->cq);
+}
+
+/* Client sends a request with payload, server reads then returns status. */
+static void test(grpc_end2end_test_config config, bool request_status_early) {
+  grpc_call *c;
+  grpc_call *s;
+  gpr_slice response_payload1_slice = gpr_slice_from_copied_string("hello");
+  grpc_byte_buffer *response_payload1 =
+      grpc_raw_byte_buffer_create(&response_payload1_slice, 1);
+  gpr_slice response_payload2_slice = gpr_slice_from_copied_string("world");
+  grpc_byte_buffer *response_payload2 =
+      grpc_raw_byte_buffer_create(&response_payload2_slice, 1);
+  gpr_timespec deadline = five_seconds_time();
+  grpc_end2end_test_fixture f = begin_test(config, "streaming_error_response",
+                                           NULL, NULL, request_status_early);
+  cq_verifier *cqv = cq_verifier_create(f.cq);
+  grpc_op ops[6];
+  grpc_op *op;
+  grpc_metadata_array initial_metadata_recv;
+  grpc_metadata_array trailing_metadata_recv;
+  grpc_metadata_array request_metadata_recv;
+  grpc_byte_buffer *response_payload1_recv = NULL;
+  grpc_byte_buffer *response_payload2_recv = NULL;
+  grpc_call_details call_details;
+  grpc_status_code status;
+  grpc_call_error error;
+  char *details = NULL;
+  size_t details_capacity = 0;
+  int was_cancelled = 2;
+
+  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+                               "/foo", "foo.test.google.fr", deadline, NULL);
+  GPR_ASSERT(c);
+
+  grpc_metadata_array_init(&initial_metadata_recv);
+  grpc_metadata_array_init(&trailing_metadata_recv);
+  grpc_metadata_array_init(&request_metadata_recv);
+  grpc_call_details_init(&call_details);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op++;
+  op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
+  op++;
+  op->op = GRPC_OP_RECV_INITIAL_METADATA;
+  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op++;
+  op->op = GRPC_OP_RECV_MESSAGE;
+  op->data.recv_message = &response_payload1_recv;
+  op++;
+  if (request_status_early) {
+    op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+    op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
+    op->data.recv_status_on_client.status = &status;
+    op->data.recv_status_on_client.status_details = &details;
+    op->data.recv_status_on_client.status_details_capacity = &details_capacity;
+    op++;
+  }
+  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  GPR_ASSERT(GRPC_CALL_OK == grpc_server_request_call(
+                                 f.server, &s, &call_details,
+                                 &request_metadata_recv, f.cq, f.cq, tag(101)));
+  cq_expect_completion(cqv, tag(101), 1);
+  cq_verify(cqv);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op++;
+  op->op = GRPC_OP_SEND_MESSAGE;
+  op->data.send_message = response_payload1;
+  op++;
+  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  cq_expect_completion(cqv, tag(102), 1);
+  cq_verify(cqv);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_MESSAGE;
+  op->data.send_message = response_payload2;
+  op++;
+  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  cq_expect_completion(cqv, tag(103), 1);
+  if (!request_status_early) {
+    cq_expect_completion(cqv, tag(1), 1);
+  }
+  cq_verify(cqv);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
+  op->data.recv_close_on_server.cancelled = &was_cancelled;
+  op++;
+  op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
+  op->data.send_status_from_server.trailing_metadata_count = 0;
+  op->data.send_status_from_server.status = GRPC_STATUS_FAILED_PRECONDITION;
+  op->data.send_status_from_server.status_details = "xyz";
+  op++;
+  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(104), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  if (!request_status_early) {
+    memset(ops, 0, sizeof(ops));
+    op = ops;
+    op->op = GRPC_OP_RECV_MESSAGE;
+    op->data.recv_message = &response_payload2_recv;
+    op++;
+    error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(2), NULL);
+    GPR_ASSERT(GRPC_CALL_OK == error);
+  }
+
+  cq_expect_completion(cqv, tag(104), 1);
+  if (request_status_early) {
+    cq_expect_completion(cqv, tag(1), 1);
+  } else {
+    cq_expect_completion(cqv, tag(2), 1);
+  }
+  cq_verify(cqv);
+
+  if (!request_status_early) {
+    memset(ops, 0, sizeof(ops));
+    op = ops;
+    op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+    op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
+    op->data.recv_status_on_client.status = &status;
+    op->data.recv_status_on_client.status_details = &details;
+    op->data.recv_status_on_client.status_details_capacity = &details_capacity;
+    op++;
+    error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(3), NULL);
+    GPR_ASSERT(GRPC_CALL_OK == error);
+
+    cq_expect_completion(cqv, tag(3), 1);
+    cq_verify(cqv);
+
+    GPR_ASSERT(response_payload1_recv != NULL);
+    GPR_ASSERT(response_payload2_recv != NULL);
+  }
+
+  GPR_ASSERT(status == GRPC_STATUS_FAILED_PRECONDITION);
+  GPR_ASSERT(0 == strcmp(details, "xyz"));
+  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
+  GPR_ASSERT(was_cancelled == 1);
+
+  gpr_free(details);
+  grpc_metadata_array_destroy(&initial_metadata_recv);
+  grpc_metadata_array_destroy(&trailing_metadata_recv);
+  grpc_metadata_array_destroy(&request_metadata_recv);
+  grpc_call_details_destroy(&call_details);
+
+  grpc_call_destroy(c);
+  grpc_call_destroy(s);
+
+  cq_verifier_destroy(cqv);
+
+  grpc_byte_buffer_destroy(response_payload1);
+  grpc_byte_buffer_destroy(response_payload2);
+  grpc_byte_buffer_destroy(response_payload1_recv);
+  grpc_byte_buffer_destroy(response_payload2_recv);
+
+  end_test(&f);
+  config.tear_down_data(&f);
+}
+
+void streaming_error_response(grpc_end2end_test_config config) {
+  test(config, false);
+  test(config, true);
+}
+
+void streaming_error_response_pre_init(void) {}
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index 57e3bd63f42..750d98b0be0 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -5400,6 +5400,7 @@
       "test/core/end2end/tests/simple_delayed_request.c", 
       "test/core/end2end/tests/simple_metadata.c", 
       "test/core/end2end/tests/simple_request.c", 
+      "test/core/end2end/tests/streaming_error_response.c", 
       "test/core/end2end/tests/trailing_metadata.c"
     ], 
     "third_party": false, 
@@ -5458,6 +5459,7 @@
       "test/core/end2end/tests/simple_delayed_request.c", 
       "test/core/end2end/tests/simple_metadata.c", 
       "test/core/end2end/tests/simple_request.c", 
+      "test/core/end2end/tests/streaming_error_response.c", 
       "test/core/end2end/tests/trailing_metadata.c"
     ], 
     "third_party": false, 
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index 3ed7a6bc476..f0e4849ec99 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -5186,6 +5186,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_census_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -6022,6 +6044,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_compress_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -6821,6 +6865,27 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fakesec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -7482,6 +7547,26 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -8316,6 +8401,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -8930,6 +9037,22 @@
       "linux"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+pipe_test", 
+    "platforms": [
+      "linux"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -9738,6 +9861,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+trace_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -10574,6 +10719,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_loadreporting_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -11373,6 +11540,27 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_oauth2_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -12045,6 +12233,27 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_proxy_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -12738,6 +12947,27 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -13410,6 +13640,27 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair+trace_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -14105,7 +14356,7 @@
   }, 
   {
     "args": [
-      "trailing_metadata"
+      "streaming_error_response"
     ], 
     "ci_platforms": [
       "windows", 
@@ -14126,19 +14377,18 @@
   }, 
   {
     "args": [
-      "bad_hostname"
+      "trailing_metadata"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14148,7 +14398,7 @@
   }, 
   {
     "args": [
-      "binary_metadata"
+      "bad_hostname"
     ], 
     "ci_platforms": [
       "windows", 
@@ -14170,7 +14420,7 @@
   }, 
   {
     "args": [
-      "call_creds"
+      "binary_metadata"
     ], 
     "ci_platforms": [
       "windows", 
@@ -14192,7 +14442,7 @@
   }, 
   {
     "args": [
-      "cancel_after_accept"
+      "call_creds"
     ], 
     "ci_platforms": [
       "windows", 
@@ -14200,7 +14450,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -14214,7 +14464,7 @@
   }, 
   {
     "args": [
-      "cancel_after_client_done"
+      "cancel_after_accept"
     ], 
     "ci_platforms": [
       "windows", 
@@ -14222,7 +14472,29 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_ssl_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "cancel_after_client_done"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -14938,6 +15210,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_ssl_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -15774,6 +16068,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_ssl_cert_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -16447,6 +16763,27 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_ssl_proxy_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -17188,6 +17525,26 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_uds_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -18000,6 +18357,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_census_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -18814,6 +19193,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_compress_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -19456,6 +19857,26 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -20268,6 +20689,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -20866,6 +21309,22 @@
       "linux"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+pipe_nosec_test", 
+    "platforms": [
+      "linux"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -21652,6 +22111,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+trace_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -22466,6 +22947,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_loadreporting_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -23118,6 +23621,27 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_proxy_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -23790,6 +24314,27 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -24441,6 +24986,27 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair+trace_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -25175,6 +25741,29 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [
+      "msan"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair_1byte_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
@@ -25898,6 +26487,26 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "streaming_error_response"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_uds_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "trailing_metadata"
diff --git a/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj b/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj
index 22cd102d116..923c1d1ab41 100644
--- a/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj
+++ b/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj
@@ -225,6 +225,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\simple_request.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\streaming_error_response.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\trailing_metadata.c">
     </ClCompile>
   </ItemGroup>
diff --git a/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj.filters b/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj.filters
index 1bb208bba8e..6533eaa057b 100644
--- a/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj.filters
+++ b/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj.filters
@@ -112,6 +112,9 @@
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\simple_request.c">
       <Filter>test\core\end2end\tests</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\streaming_error_response.c">
+      <Filter>test\core\end2end\tests</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\trailing_metadata.c">
       <Filter>test\core\end2end\tests</Filter>
     </ClCompile>
diff --git a/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj b/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj
index bfd437e8717..0b859e25ce4 100644
--- a/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj
+++ b/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj
@@ -227,6 +227,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\simple_request.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\streaming_error_response.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\trailing_metadata.c">
     </ClCompile>
   </ItemGroup>
diff --git a/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj.filters b/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj.filters
index 61c065f77ca..ea1c5e3c237 100644
--- a/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj.filters
+++ b/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj.filters
@@ -115,6 +115,9 @@
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\simple_request.c">
       <Filter>test\core\end2end\tests</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\streaming_error_response.c">
+      <Filter>test\core\end2end\tests</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\trailing_metadata.c">
       <Filter>test\core\end2end\tests</Filter>
     </ClCompile>

From 89dde5e5681a7a718b234311e302897f5861723c Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Mon, 20 Jun 2016 11:13:11 -0700
Subject: [PATCH 103/280] Fix copyright

---
 test/core/end2end/tests/streaming_error_response.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/core/end2end/tests/streaming_error_response.c b/test/core/end2end/tests/streaming_error_response.c
index c1d6f73ecdc..e15c132d633 100644
--- a/test/core/end2end/tests/streaming_error_response.c
+++ b/test/core/end2end/tests/streaming_error_response.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without

From ffaafe6fa3fbb308c00619bef45e9f43a3d8e4ba Mon Sep 17 00:00:00 2001
From: Nathaniel Manista <nathaniel@google.com>
Date: Mon, 20 Jun 2016 19:36:49 +0000
Subject: [PATCH 104/280] Change with_call from parameter to attribute

---
 src/python/grpcio/grpc/__init__.py            | 57 +++++++++++++++----
 src/python/grpcio/grpc/_channel.py            | 32 ++++++++---
 .../grpcio/grpc/beta/_client_adaptations.py   |  8 +--
 .../grpcio/tests/unit/_metadata_test.py       |  8 +--
 src/python/grpcio/tests/unit/_rpc_test.py     | 21 +++----
 5 files changed, 87 insertions(+), 39 deletions(-)

diff --git a/src/python/grpcio/grpc/__init__.py b/src/python/grpcio/grpc/__init__.py
index 28adca37723..f9b09b4cf14 100644
--- a/src/python/grpcio/grpc/__init__.py
+++ b/src/python/grpcio/grpc/__init__.py
@@ -438,9 +438,7 @@ class UnaryUnaryMultiCallable(six.with_metaclass(abc.ABCMeta)):
   """Affords invoking a unary-unary RPC."""
 
   @abc.abstractmethod
-  def __call__(
-      self, request, timeout=None, metadata=None, credentials=None,
-      with_call=False):
+  def __call__(self, request, timeout=None, metadata=None, credentials=None):
     """Synchronously invokes the underlying RPC.
 
     Args:
@@ -449,12 +447,30 @@ class UnaryUnaryMultiCallable(six.with_metaclass(abc.ABCMeta)):
       metadata: An optional sequence of pairs of bytes to be transmitted to the
         service-side of the RPC.
       credentials: An optional CallCredentials for the RPC.
-      with_call: Whether or not to include return a Call for the RPC in addition
-        to the response.
 
     Returns:
-      The response value for the RPC, and a Call for the RPC if with_call was
-        set to True at invocation.
+      The response value for the RPC.
+
+    Raises:
+      RpcError: Indicating that the RPC terminated with non-OK status. The
+        raised RpcError will also be a Call for the RPC affording the RPC's
+        metadata, status code, and details.
+    """
+    raise NotImplementedError()
+
+  @abc.abstractmethod
+  def with_call(self, request, timeout=None, metadata=None, credentials=None):
+    """Synchronously invokes the underlying RPC.
+
+    Args:
+      request: The request value for the RPC.
+      timeout: An optional durating of time in seconds to allow for the RPC.
+      metadata: An optional sequence of pairs of bytes to be transmitted to the
+        service-side of the RPC.
+      credentials: An optional CallCredentials for the RPC.
+
+    Returns:
+      The response value for the RPC and a Call value for the RPC.
 
     Raises:
       RpcError: Indicating that the RPC terminated with non-OK status. The
@@ -510,8 +526,7 @@ class StreamUnaryMultiCallable(six.with_metaclass(abc.ABCMeta)):
 
   @abc.abstractmethod
   def __call__(
-      self, request_iterator, timeout=None, metadata=None, credentials=None,
-      with_call=False):
+      self, request_iterator, timeout=None, metadata=None, credentials=None):
     """Synchronously invokes the underlying RPC.
 
     Args:
@@ -520,8 +535,6 @@ class StreamUnaryMultiCallable(six.with_metaclass(abc.ABCMeta)):
       metadata: An optional sequence of pairs of bytes to be transmitted to the
         service-side of the RPC.
       credentials: An optional CallCredentials for the RPC.
-      with_call: Whether or not to include return a Call for the RPC in addition
-        to the response.
 
     Returns:
       The response value for the RPC, and a Call for the RPC if with_call was
@@ -534,6 +547,28 @@ class StreamUnaryMultiCallable(six.with_metaclass(abc.ABCMeta)):
     """
     raise NotImplementedError()
 
+  @abc.abstractmethod
+  def with_call(
+      self, request_iterator, timeout=None, metadata=None, credentials=None):
+    """Synchronously invokes the underlying RPC.
+
+    Args:
+      request_iterator: An iterator that yields request values for the RPC.
+      timeout: An optional duration of time in seconds to allow for the RPC.
+      metadata: An optional sequence of pairs of bytes to be transmitted to the
+        service-side of the RPC.
+      credentials: An optional CallCredentials for the RPC.
+
+    Returns:
+      The response value for the RPC and a Call for the RPC.
+
+    Raises:
+      RpcError: Indicating that the RPC terminated with non-OK status. The
+        raised RpcError will also be a Call for the RPC affording the RPC's
+        metadata, status code, and details.
+    """
+    raise NotImplementedError()
+
   @abc.abstractmethod
   def future(
       self, request_iterator, timeout=None, metadata=None, credentials=None):
diff --git a/src/python/grpcio/grpc/_channel.py b/src/python/grpcio/grpc/_channel.py
index d9315d2e6cd..8b774c44488 100644
--- a/src/python/grpcio/grpc/_channel.py
+++ b/src/python/grpcio/grpc/_channel.py
@@ -449,9 +449,7 @@ class _UnaryUnaryMultiCallable(grpc.UnaryUnaryMultiCallable):
       )
       return state, operations, deadline, deadline_timespec, None
 
-  def __call__(
-      self, request, timeout=None, metadata=None, credentials=None,
-      with_call=False):
+  def _blocking(self, request, timeout, metadata, credentials):
     state, operations, deadline, deadline_timespec, rendezvous = self._prepare(
         request, timeout, metadata)
     if rendezvous:
@@ -464,7 +462,15 @@ class _UnaryUnaryMultiCallable(grpc.UnaryUnaryMultiCallable):
         call.set_credentials(credentials._credentials)
       call.start_batch(cygrpc.Operations(operations), None)
       _handle_event(completion_queue.poll(), state, self._response_deserializer)
-      return _end_unary_response_blocking(state, with_call, deadline)
+      return state, deadline
+
+  def __call__(self, request, timeout=None, metadata=None, credentials=None):
+    state, deadline, = self._blocking(request, timeout, metadata, credentials)
+    return _end_unary_response_blocking(state, False, deadline)
+
+  def with_call(self, request, timeout=None, metadata=None, credentials=None):
+    state, deadline, = self._blocking(request, timeout, metadata, credentials)
+    return _end_unary_response_blocking(state, True, deadline)
 
   def future(self, request, timeout=None, metadata=None, credentials=None):
     state, operations, deadline, deadline_timespec, rendezvous = self._prepare(
@@ -532,9 +538,7 @@ class _StreamUnaryMultiCallable(grpc.StreamUnaryMultiCallable):
     self._request_serializer = request_serializer
     self._response_deserializer = response_deserializer
 
-  def __call__(
-      self, request_iterator, timeout=None, metadata=None, credentials=None,
-      with_call=False):
+  def _blocking(self, request_iterator, timeout, metadata, credentials):
     deadline, deadline_timespec = _deadline(timeout)
     state = _RPCState(_STREAM_UNARY_INITIAL_DUE, None, None, None, None)
     completion_queue = cygrpc.CompletionQueue()
@@ -563,7 +567,19 @@ class _StreamUnaryMultiCallable(grpc.StreamUnaryMultiCallable):
         state.condition.notify_all()
         if not state.due:
           break
-    return _end_unary_response_blocking(state, with_call, deadline)
+    return state, deadline
+
+  def __call__(
+      self, request_iterator, timeout=None, metadata=None, credentials=None):
+    state, deadline, = self._blocking(
+        request_iterator, timeout, metadata, credentials)
+    return _end_unary_response_blocking(state, False, deadline)
+
+  def with_call(
+      self, request_iterator, timeout=None, metadata=None, credentials=None):
+    state, deadline, = self._blocking(
+        request_iterator, timeout, metadata, credentials)
+    return _end_unary_response_blocking(state, True, deadline)
 
   def future(
       self, request_iterator, timeout=None, metadata=None, credentials=None):
diff --git a/src/python/grpcio/grpc/beta/_client_adaptations.py b/src/python/grpcio/grpc/beta/_client_adaptations.py
index 024808c5404..56456cc117f 100644
--- a/src/python/grpcio/grpc/beta/_client_adaptations.py
+++ b/src/python/grpcio/grpc/beta/_client_adaptations.py
@@ -186,9 +186,9 @@ def _blocking_unary_unary(
         response_deserializer=response_deserializer)
     effective_metadata = _effective_metadata(metadata, metadata_transformer)
     if with_call:
-      response, call = multi_callable(
+      response, call = multi_callable.with_call(
           request, timeout=timeout, metadata=effective_metadata,
-          credentials=_credentials(protocol_options), with_call=True)
+          credentials=_credentials(protocol_options))
       return response, _Rendezvous(None, None, call)
     else:
       return multi_callable(
@@ -237,9 +237,9 @@ def _blocking_stream_unary(
         response_deserializer=response_deserializer)
     effective_metadata = _effective_metadata(metadata, metadata_transformer)
     if with_call:
-      response, call = multi_callable(
+      response, call = multi_callable.with_call(
           request_iterator, timeout=timeout, metadata=effective_metadata,
-          credentials=_credentials(protocol_options), with_call=True)
+          credentials=_credentials(protocol_options))
       return response, _Rendezvous(None, None, call)
     else:
       return multi_callable(
diff --git a/src/python/grpcio/tests/unit/_metadata_test.py b/src/python/grpcio/tests/unit/_metadata_test.py
index 77b39012619..2cb13f236bd 100644
--- a/src/python/grpcio/tests/unit/_metadata_test.py
+++ b/src/python/grpcio/tests/unit/_metadata_test.py
@@ -173,8 +173,8 @@ class MetadataTest(unittest.TestCase):
 
   def testUnaryUnary(self):
     multi_callable = self._channel.unary_unary(_UNARY_UNARY)
-    unused_response, call = multi_callable(
-        _REQUEST, metadata=_CLIENT_METADATA, with_call=True)
+    unused_response, call = multi_callable.with_call(
+        _REQUEST, metadata=_CLIENT_METADATA)
     self.assertTrue(test_common.metadata_transmitted(
         _SERVER_INITIAL_METADATA, call.initial_metadata()))
     self.assertTrue(test_common.metadata_transmitted(
@@ -192,9 +192,9 @@ class MetadataTest(unittest.TestCase):
 
   def testStreamUnary(self):
     multi_callable = self._channel.stream_unary(_STREAM_UNARY)
-    unused_response, call = multi_callable(
+    unused_response, call = multi_callable.with_call(
         [_REQUEST] * test_constants.STREAM_LENGTH,
-        metadata=_CLIENT_METADATA, with_call=True)
+        metadata=_CLIENT_METADATA)
     self.assertTrue(test_common.metadata_transmitted(
         _SERVER_INITIAL_METADATA, call.initial_metadata()))
     self.assertTrue(test_common.metadata_transmitted(
diff --git a/src/python/grpcio/tests/unit/_rpc_test.py b/src/python/grpcio/tests/unit/_rpc_test.py
index 8407593c86d..9814504edff 100644
--- a/src/python/grpcio/tests/unit/_rpc_test.py
+++ b/src/python/grpcio/tests/unit/_rpc_test.py
@@ -27,7 +27,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-"""Test of gRPC Python's application-layer API."""
+"""Test of RPCs made against gRPC Python's application-layer API."""
 
 import itertools
 import threading
@@ -216,10 +216,9 @@ class RPCTest(unittest.TestCase):
     expected_response = self._handler.handle_unary_unary(request, None)
 
     multi_callable = _unary_unary_multi_callable(self._channel)
-    response, call = multi_callable(
+    response, call = multi_callable.with_call(
         request, metadata=(
-            (b'test', b'SuccessfulUnaryRequestBlockingUnaryResponseWithCall'),),
-        with_call=True)
+            (b'test', b'SuccessfulUnaryRequestBlockingUnaryResponseWithCall'),))
 
     self.assertEqual(expected_response, response)
     self.assertIs(grpc.StatusCode.OK, call.code())
@@ -266,11 +265,11 @@ class RPCTest(unittest.TestCase):
     request_iterator = iter(requests)
 
     multi_callable = _stream_unary_multi_callable(self._channel)
-    response, call = multi_callable(
+    response, call = multi_callable.with_call(
         request_iterator,
         metadata=(
             (b'test', b'SuccessfulStreamRequestBlockingUnaryResponseWithCall'),
-        ), with_call=True)
+        ))
 
     self.assertEqual(expected_response, response)
     self.assertIs(grpc.StatusCode.OK, call.code())
@@ -525,10 +524,9 @@ class RPCTest(unittest.TestCase):
     multi_callable = _unary_unary_multi_callable(self._channel)
     with self._control.pause():
       with self.assertRaises(grpc.RpcError) as exception_context:
-        multi_callable(
+        multi_callable.with_call(
             request, timeout=test_constants.SHORT_TIMEOUT,
-            metadata=((b'test', b'ExpiredUnaryRequestBlockingUnaryResponse'),),
-            with_call=True)
+            metadata=((b'test', b'ExpiredUnaryRequestBlockingUnaryResponse'),))
 
     self.assertIsNotNone(exception_context.exception.initial_metadata())
     self.assertIs(
@@ -640,10 +638,9 @@ class RPCTest(unittest.TestCase):
     multi_callable = _unary_unary_multi_callable(self._channel)
     with self._control.fail():
       with self.assertRaises(grpc.RpcError) as exception_context:
-        multi_callable(
+        multi_callable.with_call(
             request,
-            metadata=((b'test', b'FailedUnaryRequestBlockingUnaryResponse'),),
-            with_call=True)
+            metadata=((b'test', b'FailedUnaryRequestBlockingUnaryResponse'),))
 
     self.assertIs(grpc.StatusCode.UNKNOWN, exception_context.exception.code())
 

From 36a58a7928e6a10b44b6cffdc118337ef7e0b8c1 Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Mon, 20 Jun 2016 14:01:07 -0700
Subject: [PATCH 105/280] Enable treating warnings as errors for target gRPC

---
 .../GRPCClient/GRPCCall+ChannelCredentials.h  |  4 ++--
 src/objective-c/ProtoRPC/ProtoMethod.h        |  3 +++
 src/objective-c/ProtoRPC/ProtoRPC.h           |  3 +++
 src/objective-c/ProtoRPC/ProtoService.h       |  3 +++
 src/objective-c/ProtoRPC/ProtoService.m       |  6 +++---
 src/objective-c/tests/Podfile                 | 21 ++++++++++++++++---
 6 files changed, 32 insertions(+), 8 deletions(-)

diff --git a/src/objective-c/GRPCClient/GRPCCall+ChannelCredentials.h b/src/objective-c/GRPCClient/GRPCCall+ChannelCredentials.h
index 343dd48a14e..ac2a37d75f2 100644
--- a/src/objective-c/GRPCClient/GRPCCall+ChannelCredentials.h
+++ b/src/objective-c/GRPCClient/GRPCCall+ChannelCredentials.h
@@ -41,7 +41,7 @@
  */
 + (BOOL)setTLSPEMRootCerts:(nullable NSString *)pemRootCert
                    forHost:(nonnull NSString *)host
-                     error:(NSError **)errorPtr;
+                     error:(NSError * _Nullable * _Nullable)errorPtr;
 /**
  * Configures @c host with TLS/SSL Client Credentials and optionally trusted root Certificate
  * Authorities. If @c pemRootCerts is nil, the default CA Certificates bundled with gRPC will be
@@ -51,6 +51,6 @@
             withPrivateKey:(nullable NSString *)pemPrivateKey
              withCertChain:(nullable NSString *)pemCertChain
                    forHost:(nonnull NSString *)host
-                     error:(NSError **)errorPtr;
+                     error:(NSError * _Nullable * _Nullable)errorPtr;
 
 @end
diff --git a/src/objective-c/ProtoRPC/ProtoMethod.h b/src/objective-c/ProtoRPC/ProtoMethod.h
index f9fdbb35ffd..ae3a2723fc4 100644
--- a/src/objective-c/ProtoRPC/ProtoMethod.h
+++ b/src/objective-c/ProtoRPC/ProtoMethod.h
@@ -54,6 +54,9 @@ __attribute__((deprecated("Please use GRPCProtoMethod.")))
  * This subclass is empty now. Eventually we'll remove ProtoMethod class
  * to avoid potential naming conflict
  */
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
 @interface GRPCProtoMethod : ProtoMethod
+#pragma clang diagnostic pop
 
 @end
diff --git a/src/objective-c/ProtoRPC/ProtoRPC.h b/src/objective-c/ProtoRPC/ProtoRPC.h
index 5f91f6bce1e..04fc1e45f16 100644
--- a/src/objective-c/ProtoRPC/ProtoRPC.h
+++ b/src/objective-c/ProtoRPC/ProtoRPC.h
@@ -56,6 +56,9 @@ __attribute__((deprecated("Please use GRPCProtoCall.")))
  * This subclass is empty now. Eventually we'll remove ProtoRPC class
  * to avoid potential naming conflict
  */
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
 @interface GRPCProtoCall : ProtoRPC
+#pragma clang diagnostic pop
 
 @end
diff --git a/src/objective-c/ProtoRPC/ProtoService.h b/src/objective-c/ProtoRPC/ProtoService.h
index 87d06e1ae59..7faae1b49c9 100644
--- a/src/objective-c/ProtoRPC/ProtoService.h
+++ b/src/objective-c/ProtoRPC/ProtoService.h
@@ -55,6 +55,9 @@ __attribute__((deprecated("Please use GRPCProtoService.")))
  * This subclass is empty now. Eventually we'll remove ProtoService class
  * to avoid potential naming conflict
  */
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
 @interface GRPCProtoService : ProtoService
+#pragma clang diagnostic pop
 
 @end
diff --git a/src/objective-c/ProtoRPC/ProtoService.m b/src/objective-c/ProtoRPC/ProtoService.m
index 597c3cf0fed..4a14570d818 100644
--- a/src/objective-c/ProtoRPC/ProtoService.m
+++ b/src/objective-c/ProtoRPC/ProtoService.m
@@ -65,14 +65,14 @@
   return self;
 }
 
-- (ProtoRPC *)RPCToMethod:(NSString *)method
+- (GRPCProtoCall *)RPCToMethod:(NSString *)method
            requestsWriter:(GRXWriter *)requestsWriter
             responseClass:(Class)responseClass
        responsesWriteable:(id<GRXWriteable>)responsesWriteable {
-  ProtoMethod *methodName = [[ProtoMethod alloc] initWithPackage:_packageName
+  GRPCProtoMethod *methodName = [[GRPCProtoMethod alloc] initWithPackage:_packageName
                                                          service:_serviceName
                                                           method:method];
-  return [[ProtoRPC alloc] initWithHost:_host
+  return [[GRPCProtoCall alloc] initWithHost:_host
                                  method:methodName
                          requestsWriter:requestsWriter
                           responseClass:responseClass
diff --git a/src/objective-c/tests/Podfile b/src/objective-c/tests/Podfile
index 508641d681a..53edf8c890a 100644
--- a/src/objective-c/tests/Podfile
+++ b/src/objective-c/tests/Podfile
@@ -1,9 +1,9 @@
 source 'https://github.com/CocoaPods/Specs.git'
 platform :ios, '8.0'
 
-pod 'Protobuf', :path => "../../../third_party/protobuf"
-pod 'BoringSSL', :podspec => ".."
-pod 'CronetFramework', :podspec => ".."
+pod 'Protobuf', :path => "../../../third_party/protobuf", :inhibit_warnings => true
+pod 'BoringSSL', :podspec => "..", :inhibit_warnings => true
+pod 'CronetFramework', :podspec => "..", :inhibit_warnings => true
 pod 'gRPC', :path => "../../.."
 pod 'RemoteTest', :path => "RemoteTestClient"
 
@@ -30,3 +30,18 @@ end
 
 target 'InteropTestsLocalCleartext' do
 end
+
+post_install do |installer|
+  installer.pods_project.targets.each do |target|
+    target.build_configurations.each do |config|
+      config.build_settings['GCC_TREAT_WARNINGS_AS_ERRORS'] = 'YES'
+    end
+    if target.name == 'gRPC'
+      target.build_configurations.each do |config|
+        # GPR_UNREACHABLE_CODE causes "Control may reach end of non-void
+        # function" warning
+        config.build_settings['GCC_WARN_ABOUT_RETURN_TYPE'] = 'NO'
+      end
+    end
+  end
+end

From abc7427a4d113aeb7fde6d732c63ffea1f615998 Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Mon, 20 Jun 2016 14:40:57 -0700
Subject: [PATCH 106/280] Update podfiles for objc examples

---
 examples/objective-c/auth_sample/AuthTestService.podspec     | 4 ++++
 examples/objective-c/helloworld/HelloWorld.podspec           | 4 ++++
 examples/objective-c/route_guide/RouteGuide.podspec          | 4 ++++
 src/objective-c/examples/RemoteTestClient/RemoteTest.podspec | 4 ++++
 4 files changed, 16 insertions(+)

diff --git a/examples/objective-c/auth_sample/AuthTestService.podspec b/examples/objective-c/auth_sample/AuthTestService.podspec
index e9356260534..d246653ea79 100644
--- a/examples/objective-c/auth_sample/AuthTestService.podspec
+++ b/examples/objective-c/auth_sample/AuthTestService.podspec
@@ -2,6 +2,10 @@ Pod::Spec.new do |s|
   s.name     = "AuthTestService"
   s.version  = "0.0.1"
   s.license  = "New BSD"
+  s.authors  = { 'gRPC contributors' => 'grpc-io@googlegroups.com' }
+  s.homepage = "http://www.grpc.io/"
+  s.summary = "AuthTestService example"
+  s.source = { :git => 'https://github.com/grpc/grpc.git' }
 
   s.ios.deployment_target = "7.1"
   s.osx.deployment_target = "10.9"
diff --git a/examples/objective-c/helloworld/HelloWorld.podspec b/examples/objective-c/helloworld/HelloWorld.podspec
index bdf782f6eaf..17b016b31a1 100644
--- a/examples/objective-c/helloworld/HelloWorld.podspec
+++ b/examples/objective-c/helloworld/HelloWorld.podspec
@@ -2,6 +2,10 @@ Pod::Spec.new do |s|
   s.name     = "HelloWorld"
   s.version  = "0.0.1"
   s.license  = "New BSD"
+  s.authors  = { 'gRPC contributors' => 'grpc-io@googlegroups.com' }
+  s.homepage = "http://www.grpc.io/"
+  s.summary = "HelloWorld example"
+  s.source = { :git => 'https://github.com/grpc/grpc.git' }
 
   s.ios.deployment_target = "7.1"
   s.osx.deployment_target = "10.9"
diff --git a/examples/objective-c/route_guide/RouteGuide.podspec b/examples/objective-c/route_guide/RouteGuide.podspec
index 4bc2c42cbb8..97a61ff51a5 100644
--- a/examples/objective-c/route_guide/RouteGuide.podspec
+++ b/examples/objective-c/route_guide/RouteGuide.podspec
@@ -2,6 +2,10 @@ Pod::Spec.new do |s|
   s.name     = "RouteGuide"
   s.version  = "0.0.1"
   s.license  = "New BSD"
+  s.authors  = { 'gRPC contributors' => 'grpc-io@googlegroups.com' }
+  s.homepage = "http://www.grpc.io/"
+  s.summary = "RouteGuide example"
+  s.source = { :git => 'https://github.com/grpc/grpc.git' }
 
   s.ios.deployment_target = "7.1"
   s.osx.deployment_target = "10.9"
diff --git a/src/objective-c/examples/RemoteTestClient/RemoteTest.podspec b/src/objective-c/examples/RemoteTestClient/RemoteTest.podspec
index 5addf26fc46..107e6de4e21 100644
--- a/src/objective-c/examples/RemoteTestClient/RemoteTest.podspec
+++ b/src/objective-c/examples/RemoteTestClient/RemoteTest.podspec
@@ -2,6 +2,10 @@ Pod::Spec.new do |s|
   s.name     = "RemoteTest"
   s.version  = "0.0.1"
   s.license  = "New BSD"
+  s.authors  = { 'gRPC contributors' => 'grpc-io@googlegroups.com' }
+  s.homepage = "http://www.grpc.io/"
+  s.summary = "RemoteTest example"
+  s.source = { :git => 'https://github.com/grpc/grpc.git' }
 
   s.ios.deployment_target = '7.1'
   s.osx.deployment_target = '10.9'

From 3b5ae53cd149ecb821c8950b19b06c8330e288c0 Mon Sep 17 00:00:00 2001
From: Nathaniel Manista <nathaniel@google.com>
Date: Mon, 20 Jun 2016 22:09:39 +0000
Subject: [PATCH 107/280] Correct lingering FATAL_FAILURE sites

This should have been done as part of 5444bed32f1405ebb53b0c37d3b.
---
 src/python/grpcio/tests/unit/_channel_connectivity_test.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/python/grpcio/tests/unit/_channel_connectivity_test.py b/src/python/grpcio/tests/unit/_channel_connectivity_test.py
index a1575efada7..ae8de523ecf 100644
--- a/src/python/grpcio/tests/unit/_channel_connectivity_test.py
+++ b/src/python/grpcio/tests/unit/_channel_connectivity_test.py
@@ -135,12 +135,12 @@ class ChannelConnectivityTest(unittest.TestCase):
     self.assertNotIn(
         grpc.ChannelConnectivity.TRANSIENT_FAILURE, third_connectivities)
     self.assertNotIn(
-        grpc.ChannelConnectivity.FATAL_FAILURE, third_connectivities)
+        grpc.ChannelConnectivity.SHUTDOWN, third_connectivities)
     self.assertNotIn(
         grpc.ChannelConnectivity.TRANSIENT_FAILURE,
         fourth_connectivities)
     self.assertNotIn(
-        grpc.ChannelConnectivity.FATAL_FAILURE, fourth_connectivities)
+        grpc.ChannelConnectivity.SHUTDOWN, fourth_connectivities)
 
   def test_reachable_then_unreachable_channel_connectivity(self):
     server = _server.Server((), futures.ThreadPoolExecutor(max_workers=0))

From 7981e1905f61471f8caece6eea6051b2522b9235 Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@makarand-linux.mtv.corp.google.com>
Date: Mon, 20 Jun 2016 15:38:15 -0700
Subject: [PATCH 108/280] Network status tracking

Recreated the old PR (https://github.com/grpc/grpc/pull/6283) in a new
repo since the old repo was destroyed. Removed changes to tcp_posix.c
and tpc_windows.c, instead depending on the idempotent endpoint shutdown code
from https://github.com/grpc/grpc/pull/6911.
---
 src/core/lib/iomgr/network_status_tracker.c   |  82 ++++++
 src/core/lib/iomgr/network_status_tracker.h   |  40 +++
 .../end2end/tests/network_status_change.c     | 243 ++++++++++++++++++
 3 files changed, 365 insertions(+)
 create mode 100644 src/core/lib/iomgr/network_status_tracker.c
 create mode 100644 src/core/lib/iomgr/network_status_tracker.h
 create mode 100644 test/core/end2end/tests/network_status_change.c

diff --git a/src/core/lib/iomgr/network_status_tracker.c b/src/core/lib/iomgr/network_status_tracker.c
new file mode 100644
index 00000000000..6e432368cf1
--- /dev/null
+++ b/src/core/lib/iomgr/network_status_tracker.c
@@ -0,0 +1,82 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/endpoint.h"
+#include <grpc/support/alloc.h>
+
+typedef struct endpoint_ll_node {
+  grpc_endpoint *ep;
+  struct endpoint_ll_node *next;
+} endpoint_ll_node;
+
+static endpoint_ll_node *head = NULL;
+
+// TODO(makarandd): Install callback with OS to monitor network status.
+void grpc_initialize_network_status_monitor() {
+}
+
+void grpc_destroy_network_status_monitor() {
+  for (endpoint_ll_node *curr = head; curr != NULL; ) {
+    endpoint_ll_node *next = curr->next;
+    gpr_free(curr);
+    curr = next;
+  }
+}
+
+void grpc_network_status_register_endpoint(grpc_endpoint *ep) {
+  if (head == NULL) {
+    head = (endpoint_ll_node *)gpr_malloc(sizeof(endpoint_ll_node));
+    head->ep = ep;
+    head->next = NULL;
+  } else {
+    endpoint_ll_node *prev_head = head;
+    head = (endpoint_ll_node *)gpr_malloc(sizeof(endpoint_ll_node));
+    head->ep = ep;
+    head->next = prev_head;
+  }
+}
+
+// Walk the linked-list from head and execute shutdown. It is possible that
+// other threads might be in the process of shutdown as well, but that has
+// no side effect.
+void grpc_network_status_shutdown_all_endpoints() {
+  if (head == NULL) {
+    return;
+  }
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+
+  for (endpoint_ll_node *curr = head; curr != NULL; curr = curr->next) {
+    curr->ep->vtable->shutdown(&exec_ctx, curr->ep);
+  }
+  grpc_exec_ctx_finish(&exec_ctx);
+}
diff --git a/src/core/lib/iomgr/network_status_tracker.h b/src/core/lib/iomgr/network_status_tracker.h
new file mode 100644
index 00000000000..4154151927f
--- /dev/null
+++ b/src/core/lib/iomgr/network_status_tracker.h
@@ -0,0 +1,40 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_NETWORK_STATUS_TRACKER_H
+#define GRPC_CORE_LIB_IOMGR_NETWORK_STATUS_TRACKER_H
+#include "src/core/lib/iomgr/endpoint.h"
+
+void grpc_network_status_register_endpoint(grpc_endpoint *ep);
+void grpc_network_status_shutdown_all_endpoints();
+#endif /* GRPC_CORE_LIB_IOMGR_NETWORK_STATUS_TRACKER_H */
diff --git a/test/core/end2end/tests/network_status_change.c b/test/core/end2end/tests/network_status_change.c
new file mode 100644
index 00000000000..bbc85007022
--- /dev/null
+++ b/test/core/end2end/tests/network_status_change.c
@@ -0,0 +1,243 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "test/core/end2end/end2end_tests.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#include <grpc/byte_buffer.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/time.h>
+#include <grpc/support/useful.h>
+#include "test/core/end2end/cq_verifier.h"
+
+/* this is a private API but exposed here for testing*/
+extern void grpc_network_status_shutdown_all_endpoints();
+
+enum { TIMEOUT = 200000 };
+
+static void *tag(intptr_t t) { return (void *)t; }
+
+static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
+                                            const char *test_name,
+                                            grpc_channel_args *client_args,
+                                            grpc_channel_args *server_args) {
+  grpc_end2end_test_fixture f;
+  gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
+  f = config.create_fixture(client_args, server_args);
+  config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
+  return f;
+}
+
+static gpr_timespec n_seconds_time(int n) {
+  return GRPC_TIMEOUT_SECONDS_TO_DEADLINE(n);
+}
+
+static gpr_timespec five_seconds_time(void) { return n_seconds_time(500); }
+
+static void drain_cq(grpc_completion_queue *cq) {
+  grpc_event ev;
+  do {
+    ev = grpc_completion_queue_next(cq, five_seconds_time(), NULL);
+  } while (ev.type != GRPC_QUEUE_SHUTDOWN);
+}
+
+static void shutdown_server(grpc_end2end_test_fixture *f) {
+  if (!f->server) return;
+  grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
+  GPR_ASSERT(grpc_completion_queue_pluck(
+                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                 .type == GRPC_OP_COMPLETE);
+  grpc_server_destroy(f->server);
+  f->server = NULL;
+}
+
+static void shutdown_client(grpc_end2end_test_fixture *f) {
+  if (!f->client) return;
+  grpc_channel_destroy(f->client);
+  f->client = NULL;
+}
+
+static void end_test(grpc_end2end_test_fixture *f) {
+  shutdown_server(f);
+  shutdown_client(f);
+
+  grpc_completion_queue_shutdown(f->cq);
+  drain_cq(f->cq);
+  grpc_completion_queue_destroy(f->cq);
+}
+
+/* Client sends a request with payload, server reads then returns status. */
+static void test_invoke_network_status_change(grpc_end2end_test_config config) {
+  grpc_call *c;
+  grpc_call *s;
+  gpr_slice request_payload_slice = gpr_slice_from_copied_string("hello world");
+  grpc_byte_buffer *request_payload =
+      grpc_raw_byte_buffer_create(&request_payload_slice, 1);
+  gpr_timespec deadline = five_seconds_time();
+  grpc_end2end_test_fixture f =
+      begin_test(config, "test_invoke_request_with_payload", NULL, NULL);
+  cq_verifier *cqv = cq_verifier_create(f.cq);
+  grpc_op ops[6];
+  grpc_op *op;
+  grpc_metadata_array initial_metadata_recv;
+  grpc_metadata_array trailing_metadata_recv;
+  grpc_metadata_array request_metadata_recv;
+  grpc_byte_buffer *request_payload_recv = NULL;
+  grpc_call_details call_details;
+  grpc_status_code status;
+  grpc_call_error error;
+  char *details = NULL;
+  size_t details_capacity = 0;
+  int was_cancelled = 2;
+
+  c = grpc_channel_create_call(f.client, NULL, GRPC_PROPAGATE_DEFAULTS, f.cq,
+                               "/foo", "foo.test.google.fr", deadline, NULL);
+  GPR_ASSERT(c);
+
+  grpc_metadata_array_init(&initial_metadata_recv);
+  grpc_metadata_array_init(&trailing_metadata_recv);
+  grpc_metadata_array_init(&request_metadata_recv);
+  grpc_call_details_init(&call_details);
+
+  memset(ops, 0, sizeof(ops));
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_SEND_MESSAGE;
+  op->data.send_message = request_payload;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_INITIAL_METADATA;
+  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+  op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
+  op->data.recv_status_on_client.status = &status;
+  op->data.recv_status_on_client.status_details = &details;
+  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  GPR_ASSERT(GRPC_CALL_OK == grpc_server_request_call(
+                                 f.server, &s, &call_details,
+                                 &request_metadata_recv, f.cq, f.cq, tag(101)));
+  cq_expect_completion(cqv, tag(101), 1);
+  cq_verify(cqv);
+
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_MESSAGE;
+  op->data.recv_message = &request_payload_recv;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  cq_expect_completion(cqv, tag(102), 1);
+  // Simulate the network loss event
+  grpc_network_status_shutdown_all_endpoints();
+  cq_verify(cqv);
+
+  op = ops;
+  op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
+  op->data.recv_close_on_server.cancelled = &was_cancelled;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
+  op->data.send_status_from_server.trailing_metadata_count = 0;
+  op->data.send_status_from_server.status = GRPC_STATUS_OK;
+  op->data.send_status_from_server.status_details = "xyz";
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+  void shutdown_all_endpoints();
+  cq_expect_completion(cqv, tag(103), 1);
+  cq_expect_completion(cqv, tag(1), 1);
+  cq_verify(cqv);
+
+  // Expected behavior of a RPC when network is lost.
+  GPR_ASSERT(status == GRPC_STATUS_UNAVAILABLE);
+  GPR_ASSERT(0 == strcmp(details, ""));
+  GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+  GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
+  GPR_ASSERT(was_cancelled == 0);
+
+
+  gpr_free(details);
+  grpc_metadata_array_destroy(&initial_metadata_recv);
+  grpc_metadata_array_destroy(&trailing_metadata_recv);
+  grpc_metadata_array_destroy(&request_metadata_recv);
+  grpc_call_details_destroy(&call_details);
+
+  grpc_call_destroy(c);
+  grpc_call_destroy(s);
+
+  cq_verifier_destroy(cqv);
+
+  grpc_byte_buffer_destroy(request_payload);
+  grpc_byte_buffer_destroy(request_payload_recv);
+
+  end_test(&f);
+  config.tear_down_data(&f);
+}
+
+void network_status_change(grpc_end2end_test_config config) {
+  test_invoke_network_status_change(config);
+}
+
+void network_status_change_pre_init(void) {}

From 0579cfc334794a32e243e971f77e01b5fd8f3c55 Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@makarand-linux.mtv.corp.google.com>
Date: Mon, 20 Jun 2016 15:45:24 -0700
Subject: [PATCH 109/280] more files after running build.yaml changes through

---
 BUILD                                         |   8 +
 Makefile                                      |   5 +
 binding.gyp                                   |   1 +
 build.yaml                                    |   2 +
 config.m4                                     |   1 +
 gRPC.podspec                                  |   3 +
 grpc.gemspec                                  |   2 +
 package.xml                                   |   2 +
 src/core/lib/iomgr/tcp_posix.c                |   3 +
 src/core/lib/iomgr/tcp_windows.c              |   4 +
 src/python/grpcio/grpc_core_dependencies.py   |   1 +
 test/core/end2end/end2end_nosec_tests.c       |   8 +
 test/core/end2end/end2end_tests.c             |   8 +
 test/core/end2end/gen_build_yaml.py           |   1 +
 tools/doxygen/Doxyfile.core.internal          |   2 +
 tools/run_tests/sources_and_headers.json      |   5 +
 tools/run_tests/tests.json                    | 627 +++++++++++++++++-
 vsprojects/vcxproj/grpc/grpc.vcxproj          |   3 +
 vsprojects/vcxproj/grpc/grpc.vcxproj.filters  |   6 +
 .../grpc_unsecure/grpc_unsecure.vcxproj       |   3 +
 .../grpc_unsecure.vcxproj.filters             |   6 +
 .../end2end_nosec_tests.vcxproj               |   2 +
 .../end2end_nosec_tests.vcxproj.filters       |   3 +
 .../tests/end2end_tests/end2end_tests.vcxproj |   2 +
 .../end2end_tests.vcxproj.filters             |   3 +
 25 files changed, 702 insertions(+), 9 deletions(-)

diff --git a/BUILD b/BUILD
index ac0eb8e403d..55c2ea87c65 100644
--- a/BUILD
+++ b/BUILD
@@ -187,6 +187,7 @@ cc_library(
     "src/core/lib/iomgr/iomgr_internal.h",
     "src/core/lib/iomgr/iomgr_posix.h",
     "src/core/lib/iomgr/load_file.h",
+    "src/core/lib/iomgr/network_status_tracker.h",
     "src/core/lib/iomgr/polling_entity.h",
     "src/core/lib/iomgr/pollset.h",
     "src/core/lib/iomgr/pollset_set.h",
@@ -338,6 +339,7 @@ cc_library(
     "src/core/lib/iomgr/iomgr_posix.c",
     "src/core/lib/iomgr/iomgr_windows.c",
     "src/core/lib/iomgr/load_file.c",
+    "src/core/lib/iomgr/network_status_tracker.c",
     "src/core/lib/iomgr/polling_entity.c",
     "src/core/lib/iomgr/pollset_set_windows.c",
     "src/core/lib/iomgr/pollset_windows.c",
@@ -571,6 +573,7 @@ cc_library(
     "src/core/lib/iomgr/iomgr_internal.h",
     "src/core/lib/iomgr/iomgr_posix.h",
     "src/core/lib/iomgr/load_file.h",
+    "src/core/lib/iomgr/network_status_tracker.h",
     "src/core/lib/iomgr/polling_entity.h",
     "src/core/lib/iomgr/pollset.h",
     "src/core/lib/iomgr/pollset_set.h",
@@ -712,6 +715,7 @@ cc_library(
     "src/core/lib/iomgr/iomgr_posix.c",
     "src/core/lib/iomgr/iomgr_windows.c",
     "src/core/lib/iomgr/load_file.c",
+    "src/core/lib/iomgr/network_status_tracker.c",
     "src/core/lib/iomgr/polling_entity.c",
     "src/core/lib/iomgr/pollset_set_windows.c",
     "src/core/lib/iomgr/pollset_windows.c",
@@ -920,6 +924,7 @@ cc_library(
     "src/core/lib/iomgr/iomgr_internal.h",
     "src/core/lib/iomgr/iomgr_posix.h",
     "src/core/lib/iomgr/load_file.h",
+    "src/core/lib/iomgr/network_status_tracker.h",
     "src/core/lib/iomgr/polling_entity.h",
     "src/core/lib/iomgr/pollset.h",
     "src/core/lib/iomgr/pollset_set.h",
@@ -1048,6 +1053,7 @@ cc_library(
     "src/core/lib/iomgr/iomgr_posix.c",
     "src/core/lib/iomgr/iomgr_windows.c",
     "src/core/lib/iomgr/load_file.c",
+    "src/core/lib/iomgr/network_status_tracker.c",
     "src/core/lib/iomgr/polling_entity.c",
     "src/core/lib/iomgr/pollset_set_windows.c",
     "src/core/lib/iomgr/pollset_windows.c",
@@ -1805,6 +1811,7 @@ objc_library(
     "src/core/lib/iomgr/iomgr_posix.c",
     "src/core/lib/iomgr/iomgr_windows.c",
     "src/core/lib/iomgr/load_file.c",
+    "src/core/lib/iomgr/network_status_tracker.c",
     "src/core/lib/iomgr/polling_entity.c",
     "src/core/lib/iomgr/pollset_set_windows.c",
     "src/core/lib/iomgr/pollset_windows.c",
@@ -2017,6 +2024,7 @@ objc_library(
     "src/core/lib/iomgr/iomgr_internal.h",
     "src/core/lib/iomgr/iomgr_posix.h",
     "src/core/lib/iomgr/load_file.h",
+    "src/core/lib/iomgr/network_status_tracker.h",
     "src/core/lib/iomgr/polling_entity.h",
     "src/core/lib/iomgr/pollset.h",
     "src/core/lib/iomgr/pollset_set.h",
diff --git a/Makefile b/Makefile
index d93ce337632..961485b3b80 100644
--- a/Makefile
+++ b/Makefile
@@ -2574,6 +2574,7 @@ LIBGRPC_SRC = \
     src/core/lib/iomgr/iomgr_posix.c \
     src/core/lib/iomgr/iomgr_windows.c \
     src/core/lib/iomgr/load_file.c \
+    src/core/lib/iomgr/network_status_tracker.c \
     src/core/lib/iomgr/polling_entity.c \
     src/core/lib/iomgr/pollset_set_windows.c \
     src/core/lib/iomgr/pollset_windows.c \
@@ -2844,6 +2845,7 @@ LIBGRPC_CRONET_SRC = \
     src/core/lib/iomgr/iomgr_posix.c \
     src/core/lib/iomgr/iomgr_windows.c \
     src/core/lib/iomgr/load_file.c \
+    src/core/lib/iomgr/network_status_tracker.c \
     src/core/lib/iomgr/polling_entity.c \
     src/core/lib/iomgr/pollset_set_windows.c \
     src/core/lib/iomgr/pollset_windows.c \
@@ -3183,6 +3185,7 @@ LIBGRPC_UNSECURE_SRC = \
     src/core/lib/iomgr/iomgr_posix.c \
     src/core/lib/iomgr/iomgr_windows.c \
     src/core/lib/iomgr/load_file.c \
+    src/core/lib/iomgr/network_status_tracker.c \
     src/core/lib/iomgr/polling_entity.c \
     src/core/lib/iomgr/pollset_set_windows.c \
     src/core/lib/iomgr/pollset_windows.c \
@@ -6376,6 +6379,7 @@ LIBEND2END_TESTS_SRC = \
     test/core/end2end/tests/max_concurrent_streams.c \
     test/core/end2end/tests/max_message_length.c \
     test/core/end2end/tests/negative_deadline.c \
+    test/core/end2end/tests/network_status_change.c \
     test/core/end2end/tests/no_op.c \
     test/core/end2end/tests/payload.c \
     test/core/end2end/tests/ping.c \
@@ -6452,6 +6456,7 @@ LIBEND2END_NOSEC_TESTS_SRC = \
     test/core/end2end/tests/max_concurrent_streams.c \
     test/core/end2end/tests/max_message_length.c \
     test/core/end2end/tests/negative_deadline.c \
+    test/core/end2end/tests/network_status_change.c \
     test/core/end2end/tests/no_op.c \
     test/core/end2end/tests/payload.c \
     test/core/end2end/tests/ping.c \
diff --git a/binding.gyp b/binding.gyp
index 3150d1083b0..9a4b46141ff 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -591,6 +591,7 @@
         'src/core/lib/iomgr/iomgr_posix.c',
         'src/core/lib/iomgr/iomgr_windows.c',
         'src/core/lib/iomgr/load_file.c',
+        'src/core/lib/iomgr/network_status_tracker.c',
         'src/core/lib/iomgr/polling_entity.c',
         'src/core/lib/iomgr/pollset_set_windows.c',
         'src/core/lib/iomgr/pollset_windows.c',
diff --git a/build.yaml b/build.yaml
index d41f4195947..54dae5b6ac2 100644
--- a/build.yaml
+++ b/build.yaml
@@ -183,6 +183,7 @@ filegroups:
   - src/core/lib/iomgr/iomgr_internal.h
   - src/core/lib/iomgr/iomgr_posix.h
   - src/core/lib/iomgr/load_file.h
+  - src/core/lib/iomgr/network_status_tracker.h
   - src/core/lib/iomgr/polling_entity.h
   - src/core/lib/iomgr/pollset.h
   - src/core/lib/iomgr/pollset_set.h
@@ -261,6 +262,7 @@ filegroups:
   - src/core/lib/iomgr/iomgr_posix.c
   - src/core/lib/iomgr/iomgr_windows.c
   - src/core/lib/iomgr/load_file.c
+  - src/core/lib/iomgr/network_status_tracker.c
   - src/core/lib/iomgr/polling_entity.c
   - src/core/lib/iomgr/pollset_set_windows.c
   - src/core/lib/iomgr/pollset_windows.c
diff --git a/config.m4 b/config.m4
index 716eb9841fb..6cf8b3a33fd 100644
--- a/config.m4
+++ b/config.m4
@@ -110,6 +110,7 @@ if test "$PHP_GRPC" != "no"; then
     src/core/lib/iomgr/iomgr_posix.c \
     src/core/lib/iomgr/iomgr_windows.c \
     src/core/lib/iomgr/load_file.c \
+    src/core/lib/iomgr/network_status_tracker.c \
     src/core/lib/iomgr/polling_entity.c \
     src/core/lib/iomgr/pollset_set_windows.c \
     src/core/lib/iomgr/pollset_windows.c \
diff --git a/gRPC.podspec b/gRPC.podspec
index ff8373637a6..48da2322e73 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -190,6 +190,7 @@ Pod::Spec.new do |s|
                       'src/core/lib/iomgr/iomgr_internal.h',
                       'src/core/lib/iomgr/iomgr_posix.h',
                       'src/core/lib/iomgr/load_file.h',
+                      'src/core/lib/iomgr/network_status_tracker.h',
                       'src/core/lib/iomgr/polling_entity.h',
                       'src/core/lib/iomgr/pollset.h',
                       'src/core/lib/iomgr/pollset_set.h',
@@ -375,6 +376,7 @@ Pod::Spec.new do |s|
                       'src/core/lib/iomgr/iomgr_posix.c',
                       'src/core/lib/iomgr/iomgr_windows.c',
                       'src/core/lib/iomgr/load_file.c',
+                      'src/core/lib/iomgr/network_status_tracker.c',
                       'src/core/lib/iomgr/polling_entity.c',
                       'src/core/lib/iomgr/pollset_set_windows.c',
                       'src/core/lib/iomgr/pollset_windows.c',
@@ -570,6 +572,7 @@ Pod::Spec.new do |s|
                               'src/core/lib/iomgr/iomgr_internal.h',
                               'src/core/lib/iomgr/iomgr_posix.h',
                               'src/core/lib/iomgr/load_file.h',
+                              'src/core/lib/iomgr/network_status_tracker.h',
                               'src/core/lib/iomgr/polling_entity.h',
                               'src/core/lib/iomgr/pollset.h',
                               'src/core/lib/iomgr/pollset_set.h',
diff --git a/grpc.gemspec b/grpc.gemspec
index 184a5485917..5796cd68bc2 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -199,6 +199,7 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/lib/iomgr/iomgr_internal.h )
   s.files += %w( src/core/lib/iomgr/iomgr_posix.h )
   s.files += %w( src/core/lib/iomgr/load_file.h )
+  s.files += %w( src/core/lib/iomgr/network_status_tracker.h )
   s.files += %w( src/core/lib/iomgr/polling_entity.h )
   s.files += %w( src/core/lib/iomgr/pollset.h )
   s.files += %w( src/core/lib/iomgr/pollset_set.h )
@@ -354,6 +355,7 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/lib/iomgr/iomgr_posix.c )
   s.files += %w( src/core/lib/iomgr/iomgr_windows.c )
   s.files += %w( src/core/lib/iomgr/load_file.c )
+  s.files += %w( src/core/lib/iomgr/network_status_tracker.c )
   s.files += %w( src/core/lib/iomgr/polling_entity.c )
   s.files += %w( src/core/lib/iomgr/pollset_set_windows.c )
   s.files += %w( src/core/lib/iomgr/pollset_windows.c )
diff --git a/package.xml b/package.xml
index 67e9bb2c282..623174ad016 100644
--- a/package.xml
+++ b/package.xml
@@ -206,6 +206,7 @@
     <file baseinstalldir="/" name="src/core/lib/iomgr/iomgr_internal.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/iomgr_posix.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/load_file.h" role="src" />
+    <file baseinstalldir="/" name="src/core/lib/iomgr/network_status_tracker.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/polling_entity.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/pollset.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/pollset_set.h" role="src" />
@@ -361,6 +362,7 @@
     <file baseinstalldir="/" name="src/core/lib/iomgr/iomgr_posix.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/iomgr_windows.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/load_file.c" role="src" />
+    <file baseinstalldir="/" name="src/core/lib/iomgr/network_status_tracker.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/polling_entity.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/pollset_set_windows.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/pollset_windows.c" role="src" />
diff --git a/src/core/lib/iomgr/tcp_posix.c b/src/core/lib/iomgr/tcp_posix.c
index 017f52c3677..f7818353b0a 100644
--- a/src/core/lib/iomgr/tcp_posix.c
+++ b/src/core/lib/iomgr/tcp_posix.c
@@ -35,6 +35,7 @@
 
 #ifdef GPR_POSIX_SOCKET
 
+#include "src/core/lib/iomgr/network_status_tracker.h"
 #include "src/core/lib/iomgr/tcp_posix.h"
 
 #include <errno.h>
@@ -474,6 +475,8 @@ grpc_endpoint *grpc_tcp_create(grpc_fd *em_fd, size_t slice_size,
   tcp->write_closure.cb = tcp_handle_write;
   tcp->write_closure.cb_arg = tcp;
   gpr_slice_buffer_init(&tcp->last_read_buffer);
+  /* Tell network status tracker about new endpoint */
+  grpc_network_status_register_endpoint(&tcp->base);
 
   return &tcp->base;
 }
diff --git a/src/core/lib/iomgr/tcp_windows.c b/src/core/lib/iomgr/tcp_windows.c
index b2af8030aaa..8140d1d8cd2 100644
--- a/src/core/lib/iomgr/tcp_windows.c
+++ b/src/core/lib/iomgr/tcp_windows.c
@@ -37,6 +37,7 @@
 
 #include <limits.h>
 
+#include "src/core/lib/iomgr/network_status_tracker.h"
 #include "src/core/lib/iomgr/sockaddr_windows.h"
 
 #include <grpc/support/alloc.h>
@@ -401,6 +402,9 @@ grpc_endpoint *grpc_tcp_create(grpc_winsocket *socket, char *peer_string) {
   grpc_closure_init(&tcp->on_read, on_read, tcp);
   grpc_closure_init(&tcp->on_write, on_write, tcp);
   tcp->peer_string = gpr_strdup(peer_string);
+  /* Tell network status tracking code about the new endpoint */
+  grpc_network_status_register_endpoint(&tcp->base);
+
   return &tcp->base;
 }
 
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index 839c555f055..575dfa9dbde 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -104,6 +104,7 @@ CORE_SOURCE_FILES = [
   'src/core/lib/iomgr/iomgr_posix.c',
   'src/core/lib/iomgr/iomgr_windows.c',
   'src/core/lib/iomgr/load_file.c',
+  'src/core/lib/iomgr/network_status_tracker.c',
   'src/core/lib/iomgr/polling_entity.c',
   'src/core/lib/iomgr/pollset_set_windows.c',
   'src/core/lib/iomgr/pollset_windows.c',
diff --git a/test/core/end2end/end2end_nosec_tests.c b/test/core/end2end/end2end_nosec_tests.c
index b71299c09e0..09ed6e6d688 100644
--- a/test/core/end2end/end2end_nosec_tests.c
+++ b/test/core/end2end/end2end_nosec_tests.c
@@ -89,6 +89,8 @@ extern void max_message_length(grpc_end2end_test_config config);
 extern void max_message_length_pre_init(void);
 extern void negative_deadline(grpc_end2end_test_config config);
 extern void negative_deadline_pre_init(void);
+extern void network_status_change(grpc_end2end_test_config config);
+extern void network_status_change_pre_init(void);
 extern void no_op(grpc_end2end_test_config config);
 extern void no_op_pre_init(void);
 extern void payload(grpc_end2end_test_config config);
@@ -144,6 +146,7 @@ void grpc_end2end_tests_pre_init(void) {
   max_concurrent_streams_pre_init();
   max_message_length_pre_init();
   negative_deadline_pre_init();
+  network_status_change_pre_init();
   no_op_pre_init();
   payload_pre_init();
   ping_pre_init();
@@ -190,6 +193,7 @@ void grpc_end2end_tests(int argc, char **argv,
     max_concurrent_streams(config);
     max_message_length(config);
     negative_deadline(config);
+    network_status_change(config);
     no_op(config);
     payload(config);
     ping(config);
@@ -300,6 +304,10 @@ void grpc_end2end_tests(int argc, char **argv,
       negative_deadline(config);
       continue;
     }
+    if (0 == strcmp("network_status_change", argv[i])) {
+      network_status_change(config);
+      continue;
+    }
     if (0 == strcmp("no_op", argv[i])) {
       no_op(config);
       continue;
diff --git a/test/core/end2end/end2end_tests.c b/test/core/end2end/end2end_tests.c
index 00c9c44a78c..312700646cd 100644
--- a/test/core/end2end/end2end_tests.c
+++ b/test/core/end2end/end2end_tests.c
@@ -91,6 +91,8 @@ extern void max_message_length(grpc_end2end_test_config config);
 extern void max_message_length_pre_init(void);
 extern void negative_deadline(grpc_end2end_test_config config);
 extern void negative_deadline_pre_init(void);
+extern void network_status_change(grpc_end2end_test_config config);
+extern void network_status_change_pre_init(void);
 extern void no_op(grpc_end2end_test_config config);
 extern void no_op_pre_init(void);
 extern void payload(grpc_end2end_test_config config);
@@ -147,6 +149,7 @@ void grpc_end2end_tests_pre_init(void) {
   max_concurrent_streams_pre_init();
   max_message_length_pre_init();
   negative_deadline_pre_init();
+  network_status_change_pre_init();
   no_op_pre_init();
   payload_pre_init();
   ping_pre_init();
@@ -194,6 +197,7 @@ void grpc_end2end_tests(int argc, char **argv,
     max_concurrent_streams(config);
     max_message_length(config);
     negative_deadline(config);
+    network_status_change(config);
     no_op(config);
     payload(config);
     ping(config);
@@ -308,6 +312,10 @@ void grpc_end2end_tests(int argc, char **argv,
       negative_deadline(config);
       continue;
     }
+    if (0 == strcmp("network_status_change", argv[i])) {
+      network_status_change(config);
+      continue;
+    }
     if (0 == strcmp("no_op", argv[i])) {
       no_op(config);
       continue;
diff --git a/test/core/end2end/gen_build_yaml.py b/test/core/end2end/gen_build_yaml.py
index 325d9b3cad0..716dca20bb1 100755
--- a/test/core/end2end/gen_build_yaml.py
+++ b/test/core/end2end/gen_build_yaml.py
@@ -112,6 +112,7 @@ END2END_TESTS = {
     'max_concurrent_streams': default_test_options._replace(proxyable=False),
     'max_message_length': default_test_options,
     'negative_deadline': default_test_options,
+    'network_status_change': default_test_options,
     'no_op': default_test_options,
     'payload': default_test_options,
     'ping_pong_streaming': default_test_options,
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index e1555930e91..545536c97c4 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -818,6 +818,7 @@ src/core/lib/iomgr/iomgr.h \
 src/core/lib/iomgr/iomgr_internal.h \
 src/core/lib/iomgr/iomgr_posix.h \
 src/core/lib/iomgr/load_file.h \
+src/core/lib/iomgr/network_status_tracker.h \
 src/core/lib/iomgr/polling_entity.h \
 src/core/lib/iomgr/pollset.h \
 src/core/lib/iomgr/pollset_set.h \
@@ -973,6 +974,7 @@ src/core/lib/iomgr/iomgr.c \
 src/core/lib/iomgr/iomgr_posix.c \
 src/core/lib/iomgr/iomgr_windows.c \
 src/core/lib/iomgr/load_file.c \
+src/core/lib/iomgr/network_status_tracker.c \
 src/core/lib/iomgr/polling_entity.c \
 src/core/lib/iomgr/pollset_set_windows.c \
 src/core/lib/iomgr/pollset_windows.c \
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index 57e3bd63f42..7f8cc8ad436 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -5387,6 +5387,7 @@
       "test/core/end2end/tests/max_concurrent_streams.c", 
       "test/core/end2end/tests/max_message_length.c", 
       "test/core/end2end/tests/negative_deadline.c", 
+      "test/core/end2end/tests/network_status_change.c", 
       "test/core/end2end/tests/no_op.c", 
       "test/core/end2end/tests/payload.c", 
       "test/core/end2end/tests/ping.c", 
@@ -5445,6 +5446,7 @@
       "test/core/end2end/tests/max_concurrent_streams.c", 
       "test/core/end2end/tests/max_message_length.c", 
       "test/core/end2end/tests/negative_deadline.c", 
+      "test/core/end2end/tests/network_status_change.c", 
       "test/core/end2end/tests/no_op.c", 
       "test/core/end2end/tests/payload.c", 
       "test/core/end2end/tests/ping.c", 
@@ -5732,6 +5734,7 @@
       "src/core/lib/iomgr/iomgr_internal.h", 
       "src/core/lib/iomgr/iomgr_posix.h", 
       "src/core/lib/iomgr/load_file.h", 
+      "src/core/lib/iomgr/network_status_tracker.h", 
       "src/core/lib/iomgr/polling_entity.h", 
       "src/core/lib/iomgr/pollset.h", 
       "src/core/lib/iomgr/pollset_set.h", 
@@ -5847,6 +5850,8 @@
       "src/core/lib/iomgr/iomgr_windows.c", 
       "src/core/lib/iomgr/load_file.c", 
       "src/core/lib/iomgr/load_file.h", 
+      "src/core/lib/iomgr/network_status_tracker.c", 
+      "src/core/lib/iomgr/network_status_tracker.h", 
       "src/core/lib/iomgr/polling_entity.c", 
       "src/core/lib/iomgr/polling_entity.h", 
       "src/core/lib/iomgr/pollset.h", 
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index 3ed7a6bc476..bf5ff5be191 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -4900,6 +4900,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_census_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -5736,6 +5758,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_compress_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -6548,6 +6592,27 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fakesec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -7262,6 +7327,26 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -8030,6 +8115,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -8722,6 +8829,22 @@
       "linux"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+pipe_test", 
+    "platforms": [
+      "linux"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -9452,6 +9575,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+trace_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -10288,6 +10433,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_loadreporting_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -11100,6 +11267,27 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_oauth2_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -11814,6 +12002,27 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_proxy_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -12507,6 +12716,27 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -13179,6 +13409,27 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair+trace_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -13874,7 +14125,7 @@
   }, 
   {
     "args": [
-      "no_op"
+      "network_status_change"
     ], 
     "ci_platforms": [
       "windows", 
@@ -13895,7 +14146,7 @@
   }, 
   {
     "args": [
-      "payload"
+      "no_op"
     ], 
     "ci_platforms": [
       "windows", 
@@ -13916,7 +14167,7 @@
   }, 
   {
     "args": [
-      "ping_pong_streaming"
+      "payload"
     ], 
     "ci_platforms": [
       "windows", 
@@ -13937,7 +14188,7 @@
   }, 
   {
     "args": [
-      "registered_call"
+      "ping_pong_streaming"
     ], 
     "ci_platforms": [
       "windows", 
@@ -13958,14 +14209,14 @@
   }, 
   {
     "args": [
-      "request_with_flags"
+      "registered_call"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -13979,14 +14230,14 @@
   }, 
   {
     "args": [
-      "request_with_payload"
+      "request_with_flags"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -14000,7 +14251,28 @@
   }, 
   {
     "args": [
-      "server_finishes_request"
+      "request_with_payload"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair_1byte_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "server_finishes_request"
     ], 
     "ci_platforms": [
       "windows", 
@@ -14652,6 +14924,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_ssl_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -15488,6 +15782,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_ssl_cert_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -16216,6 +16532,27 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_ssl_proxy_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -16928,6 +17265,26 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_uds_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -17714,6 +18071,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_census_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -18528,6 +18907,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_compress_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -19236,6 +19637,26 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_fd_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -19982,6 +20403,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -20658,6 +21101,22 @@
       "linux"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+pipe_nosec_test", 
+    "platforms": [
+      "linux"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -21366,6 +21825,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+trace_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -22180,6 +22661,28 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_loadreporting_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -22887,6 +23390,27 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_proxy_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -23559,6 +24083,27 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -24210,6 +24755,27 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair+trace_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -24922,6 +25488,29 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [
+      "msan"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair_1byte_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
@@ -25638,6 +26227,26 @@
       "posix"
     ]
   }, 
+  {
+    "args": [
+      "network_status_change"
+    ], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_uds_nosec_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [
       "no_op"
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj b/vsprojects/vcxproj/grpc/grpc.vcxproj
index 84e03f70561..be4a28d5ecf 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj
@@ -327,6 +327,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\iomgr_internal.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\iomgr_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\polling_entity.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset_set.h" />
@@ -513,6 +514,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\polling_entity.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset_set_windows.c">
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
index 0f817e0562d..086b62d572c 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
@@ -88,6 +88,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.c">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\polling_entity.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
@@ -731,6 +734,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.h">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\polling_entity.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
index ac9bb186b71..d88fc0eef0a 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
@@ -316,6 +316,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\iomgr_internal.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\iomgr_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\polling_entity.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset_set.h" />
@@ -480,6 +481,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\polling_entity.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset_set_windows.c">
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index 1341474142c..e1bc1801f2f 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -91,6 +91,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.c">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\polling_entity.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
@@ -638,6 +641,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.h">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\polling_entity.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj b/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj
index 22cd102d116..5297d79e263 100644
--- a/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj
+++ b/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj
@@ -199,6 +199,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\negative_deadline.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\network_status_change.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\no_op.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\payload.c">
diff --git a/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj.filters b/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj.filters
index 1bb208bba8e..897a42386f4 100644
--- a/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj.filters
+++ b/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj.filters
@@ -73,6 +73,9 @@
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\negative_deadline.c">
       <Filter>test\core\end2end\tests</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\network_status_change.c">
+      <Filter>test\core\end2end\tests</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\no_op.c">
       <Filter>test\core\end2end\tests</Filter>
     </ClCompile>
diff --git a/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj b/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj
index bfd437e8717..3bc61fc581d 100644
--- a/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj
+++ b/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj
@@ -201,6 +201,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\negative_deadline.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\network_status_change.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\no_op.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\payload.c">
diff --git a/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj.filters b/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj.filters
index 61c065f77ca..b896ff8bf1f 100644
--- a/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj.filters
+++ b/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj.filters
@@ -76,6 +76,9 @@
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\negative_deadline.c">
       <Filter>test\core\end2end\tests</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\network_status_change.c">
+      <Filter>test\core\end2end\tests</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\no_op.c">
       <Filter>test\core\end2end\tests</Filter>
     </ClCompile>

From 2f8ade0b9df48990e3617a302a5da946f032d4f6 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Fri, 17 Jun 2016 13:28:38 -0700
Subject: [PATCH 110/280] Significantly refactor the polling island locking and
 refcounting code

---
 src/core/lib/iomgr/ev_epoll_linux.c | 462 ++++++++++++++++------------
 1 file changed, 270 insertions(+), 192 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index ed2c494b783..72288889c02 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -140,18 +140,40 @@ static void fd_global_shutdown(void);
 #define CLOSURE_READY ((grpc_closure *)1)
 
 /*******************************************************************************
- * Polling-island Declarations
+ * Polling island Declarations
  */
-/* TODO: sree: Consider making ref_cnt and merged_to to gpr_atm - This would
- * significantly reduce the number of mutex acquisition calls. */
+
+// #define GRPC_PI_REF_COUNT_DEBUG
+#ifdef GRPC_PI_REF_COUNT_DEBUG
+
+#define PI_ADD_REF(p, r) pi_add_ref_dbg((p), 1, (r), __FILE__, __LINE__)
+#define PI_UNREF(p, r) pi_unref_dbg((p), 1, (r), __FILE__, __LINE__)
+
+#else /* defined(GRPC_PI_REF_COUNT_DEBUG) */
+
+#define PI_ADD_REF(p, r) pi_add_ref((p), 1)
+#define PI_UNREF(p, r) pi_unref((p), 1)
+
+#endif /* !defined(GPRC_PI_REF_COUNT_DEBUG) */
+
 typedef struct polling_island {
   gpr_mu mu;
-  int ref_cnt;
-
-  /* Points to the polling_island this merged into.
-   * If merged_to is not NULL, all the remaining fields (except mu and ref_cnt)
-   * are invalid and must be ignored */
-  struct polling_island *merged_to;
+  /* Ref count. Use PI_ADD_REF() and PI_UNREF() macros to increment/decrement
+     the refcount.
+     Once the ref count becomes zero, this structure is destroyed which means
+     we should ensure that there is never a scenario where a PI_ADD_REF() is
+     racing with a PI_UNREF() that just made the ref_count zero. */
+  gpr_atm ref_count;
+
+  /* Pointer to the polling_island this merged into.
+   * merged_to value is only set once in polling_island's lifetime (and that too
+   * only if the island is merged with another island). Because of this, we can
+   * use gpr_atm type here so that we can do atomic access on this and reduce
+   * lock contention on 'mu' mutex.
+   *
+   * Note that if this field is not NULL (i.e not 0), all the remaining fields
+   * (except mu and ref_count) are invalid and must be ignored. */
+  gpr_atm merged_to;
 
   /* The fd of the underlying epoll set */
   int epoll_fd;
@@ -236,6 +258,8 @@ static grpc_wakeup_fd polling_island_wakeup_fd;
 static gpr_mu g_pi_freelist_mu;
 static polling_island *g_pi_freelist = NULL;
 
+static void polling_island_delete(); /* Forward declaration */
+
 #ifdef GRPC_TSAN
 /* Currently TSAN may incorrectly flag data races between epoll_ctl and
    epoll_wait for any grpc_fd structs that are added to the epoll set via
@@ -247,6 +271,51 @@ static polling_island *g_pi_freelist = NULL;
 gpr_atm g_epoll_sync;
 #endif /* defined(GRPC_TSAN) */
 
+#ifdef GRPC_PI_REF_COUNT_DEBUG
+long pi_add_ref(polling_island *pi, int ref_cnt);
+long pi_unref(polling_island *pi, int ref_cnt);
+
+void pi_add_ref_dbg(polling_island *pi, int ref_cnt, char *reason, char *file,
+                    int line) {
+  long old_cnt = pi_add_ref(pi, ref_cnt);
+  gpr_log(GPR_DEBUG, "Add ref pi: %p, old:%ld -> new:%ld (%s) - (%s, %d)",
+          (void *)pi, old_cnt, (old_cnt + ref_cnt), reason, file, line);
+}
+
+void pi_unref_dbg(polling_island *pi, int ref_cnt, char *reason, char *file,
+                  int line) {
+  long old_cnt = pi_unref(pi, ref_cnt);
+  gpr_log(GPR_DEBUG, "Unref pi: %p, old:%ld -> new:%ld (%s) - (%s, %d)",
+          (void *)pi, old_cnt, (old_cnt - ref_cnt), reason, file, line);
+}
+#endif
+
+long pi_add_ref(polling_island *pi, int ref_cnt) {
+  return gpr_atm_no_barrier_fetch_add(&pi->ref_count, ref_cnt);
+}
+
+long pi_unref(polling_island *pi, int ref_cnt) {
+  long old_cnt = gpr_atm_no_barrier_fetch_add(&pi->ref_count, -ref_cnt);
+
+  /* If ref count went to zero, delete the polling island. Note that this need
+     not be done under a lock. Once the ref count goes to zero, we are
+     guaranteed that no one else holds a reference to the polling island (and
+     that there is no racing pi_add_ref() call either.
+
+     Also, if we are deleting the polling island and the merged_to field is
+     non-empty, we should remove a ref to the merged_to polling island
+   */
+  if (old_cnt == ref_cnt) {
+    polling_island *next = (polling_island *)gpr_atm_acq_load(&pi->merged_to);
+    polling_island_delete(pi);
+    if (next != NULL) {
+      PI_UNREF(next, "pi_delete"); /* Recursive call */
+    }
+  }
+
+  return old_cnt;
+}
+
 /* The caller is expected to hold pi->mu lock before calling this function */
 static void polling_island_add_fds_locked(polling_island *pi, grpc_fd **fds,
                                           size_t fd_count, bool add_fd_refs) {
@@ -355,8 +424,7 @@ static void polling_island_remove_fd_locked(polling_island *pi, grpc_fd *fd,
   }
 }
 
-static polling_island *polling_island_create(grpc_fd *initial_fd,
-                                             int initial_ref_cnt) {
+static polling_island *polling_island_create(grpc_fd *initial_fd) {
   polling_island *pi = NULL;
 
   /* Try to get one from the polling island freelist */
@@ -377,6 +445,9 @@ static polling_island *polling_island_create(grpc_fd *initial_fd,
     pi->fds = NULL;
   }
 
+  gpr_atm_no_barrier_store(&pi->ref_count, 0);
+  gpr_atm_no_barrier_store(&pi->merged_to, NULL);
+
   pi->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
 
   if (pi->epoll_fd < 0) {
@@ -387,14 +458,12 @@ static polling_island *polling_island_create(grpc_fd *initial_fd,
 
   polling_island_add_wakeup_fd_locked(pi, &grpc_global_wakeup_fd);
 
-  pi->ref_cnt = initial_ref_cnt;
-  pi->merged_to = NULL;
   pi->next_free = NULL;
 
   if (initial_fd != NULL) {
-    /* It is not really needed to get the pi->mu lock here. If this is a newly
-       created polling island (or one that we got from the freelist), no one
-       else would be holding a lock to it anyway */
+    /* Lock the polling island here just in case we got this structure from the
+       freelist and the polling island lock was not released yet (by the code
+       that adds the polling island to the freelist) */
     gpr_mu_lock(&pi->mu);
     polling_island_add_fds_locked(pi, &initial_fd, 1, true);
     gpr_mu_unlock(&pi->mu);
@@ -404,140 +473,136 @@ static polling_island *polling_island_create(grpc_fd *initial_fd,
 }
 
 static void polling_island_delete(polling_island *pi) {
-  GPR_ASSERT(pi->ref_cnt == 0);
   GPR_ASSERT(pi->fd_cnt == 0);
 
+  gpr_atm_rel_store(&pi->merged_to, NULL);
+
   close(pi->epoll_fd);
   pi->epoll_fd = -1;
 
-  pi->merged_to = NULL;
-
   gpr_mu_lock(&g_pi_freelist_mu);
   pi->next_free = g_pi_freelist;
   g_pi_freelist = pi;
   gpr_mu_unlock(&g_pi_freelist_mu);
 }
 
-void polling_island_unref_and_unlock(polling_island *pi, int unref_by) {
-  pi->ref_cnt -= unref_by;
-  int ref_cnt = pi->ref_cnt;
-  GPR_ASSERT(ref_cnt >= 0);
-
-  gpr_mu_unlock(&pi->mu);
-
-  if (ref_cnt == 0) {
-    polling_island_delete(pi);
-  }
-}
-
-polling_island *polling_island_update_and_lock(polling_island *pi, int unref_by,
-                                               int add_ref_by) {
+/* Gets the lock on the *latest* polling island i.e the last polling island in
+   the linked list (linked by 'merged_to' link). Call gpr_mu_unlock on the
+   returned polling island's mu.
+   Usage: To lock/unlock polling island "pi", do the following:
+      polling_island *pi_latest = polling_island_lock(pi);
+      ...
+      ... critical section ..
+      ...
+      gpr_mu_unlock(&pi_latest->mu); //NOTE: use pi_latest->mu. NOT pi->mu */
+polling_island *polling_island_lock(polling_island *pi) {
   polling_island *next = NULL;
-  gpr_mu_lock(&pi->mu);
-  while (pi->merged_to != NULL) {
-    next = pi->merged_to;
-    polling_island_unref_and_unlock(pi, unref_by);
+  while (true) {
+    next = (polling_island *)gpr_atm_acq_load(&pi->merged_to);
+    if (next == NULL) {
+      /* pi is the last node in the linked list. Get the lock and check again
+         (under the pi->mu lock) that pi is still the last node (because a merge
+         may have happend after the (next == NULL) check above and before
+         getting the pi->mu lock.
+         If pi is the last node, we are done. If not, unlock and continue
+         traversing the list */
+      gpr_mu_lock(&pi->mu);
+      next = (polling_island *)gpr_atm_acq_load(&pi->merged_to);
+      if (next == NULL) {
+        break;
+      }
+      gpr_mu_unlock(&pi->mu);
+    }
+
     pi = next;
-    gpr_mu_lock(&pi->mu);
   }
 
-  pi->ref_cnt += add_ref_by;
   return pi;
 }
 
-void polling_island_pair_update_and_lock(polling_island **p,
-                                         polling_island **q) {
+/* Gets the lock on the *latest* polling islands pointed by *p and *q.
+   This function is needed because calling the following block of code to obtain
+   locks on polling islands (*p and *q) is prone to deadlocks.
+     {
+       polling_island_lock(*p);
+       polling_island_lock(*q);
+     }
+
+   Usage/exmaple:
+     polling_island *p1;
+     polling_island *p2;
+     ..
+     polling_island_lock_pair(&p1, &p2);
+     ..
+     .. Critical section with both p1 and p2 locked
+     ..
+     // Release locks
+     // **IMPORTANT**: Make sure you check p1 == p2 AFTER the function
+     // polling_island_lock_pair() was called and if so, release the lock only
+     // once. Note: Even if p1 != p2 beforec calling polling_island_lock_pair(),
+     // they might be after the function returns:
+     if (p1 == p2) {
+       gpr_mu_unlock(&p1->mu)
+     } else {
+       gpr_mu_unlock(&p1->mu);
+       gpr_mu_unlock(&p2->mu);
+     }
+
+*/
+void polling_island_lock_pair(polling_island **p, polling_island **q) {
   polling_island *pi_1 = *p;
   polling_island *pi_2 = *q;
-  polling_island *temp = NULL;
-  bool pi_1_locked = false;
-  bool pi_2_locked = false;
-  int num_swaps = 0;
-
-  /* Loop until either pi_1 == pi_2 or until we acquired locks on both pi_1
-     and pi_2 */
-  while (pi_1 != pi_2 && !(pi_1_locked && pi_2_locked)) {
-    /* The following assertions are true at this point:
-       - pi_1 != pi_2  (else, the while loop would have exited)
-       - pi_1 MAY be locked
-       - pi_2 is NOT locked */
-
-    /* To maintain lock order consistency, always lock polling_island node with
-       lower address first.
-       First, make sure pi_1 < pi_2 before proceeding any further. If it turns
-       out that pi_1 > pi_2, unlock pi_1 if locked (because pi_2 is not locked
-       at this point and having pi_1 locked would violate the lock order) and
-       swap pi_1 and pi_2 so that pi_1 becomes less than pi_2 */
-    if (pi_1 > pi_2) {
-      if (pi_1_locked) {
-        gpr_mu_unlock(&pi_1->mu);
-        pi_1_locked = false;
-      }
+  polling_island *next_1 = NULL;
+  polling_island *next_2 = NULL;
+
+  /* The algorithm is simple:
+      - Go to the last polling islands in the linked lists *pi_1 and *pi_2 (and
+        keep updating pi_1 and pi_2)
+      - Then obtain locks on the islands by following a lock order rule of
+        locking polling_island with lower address first
+           Special case: Before obtaining the locks, check if pi_1 and pi_2 are
+           pointing to the same island. If that is the case, we can just call
+           polling_island_lock()
+      - After obtaining both the locks, double check that the polling islands
+        are still the last polling islands in their respective linked lists
+        (this is because there might have been polling island merges before
+        we got the lock)
+      - If the polling islands are the last islands, we are done. If not,
+        release the locks and continue the process from the first step */
+  while (true) {
+    next_1 = (polling_island *)gpr_atm_acq_load(&pi_1->merged_to);
+    while (next_1 != NULL) {
+      pi_1 = next_1;
+      next_1 = (polling_island *)gpr_atm_acq_load(&pi_1->merged_to);
+    }
 
-      GPR_SWAP(polling_island *, pi_1, pi_2);
-      num_swaps++;
+    next_2 = (polling_island *)gpr_atm_acq_load(&pi_2->merged_to);
+    while (next_2 != NULL) {
+      pi_2 = next_2;
+      next_2 = (polling_island *)gpr_atm_acq_load(&pi_2->merged_to);
     }
 
-    /* The following assertions are true at this point:
-       - pi_1 != pi_2
-       - pi_1 < pi_2  (address of pi_1 is less than that of pi_2)
-       - pi_1 MAYBE locked
-       - pi_2 is NOT locked */
+    if (pi_1 == pi_2) {
+      pi_1 = pi_2 = polling_island_lock(pi_1);
+      break;
+    }
 
-    /* Lock pi_1 (if pi_1 is pointing to the terminal node in the list) */
-    if (!pi_1_locked) {
+    if (pi_1 < pi_2) {
+      gpr_mu_lock(&pi_1->mu);
+      gpr_mu_lock(&pi_2->mu);
+    } else {
+      gpr_mu_lock(&pi_2->mu);
       gpr_mu_lock(&pi_1->mu);
-      pi_1_locked = true;
-
-      /* If pi_1 is not terminal node (i.e pi_1->merged_to != NULL), we are not
-         done locking this polling_island yet. Release the lock on this node and
-         advance pi_1 to the next node in the list; and go to the beginning of
-         the loop (we can't proceed to locking pi_2 unless we locked pi_1 first)
-         */
-      if (pi_1->merged_to != NULL) {
-        temp = pi_1->merged_to;
-        polling_island_unref_and_unlock(pi_1, 1);
-        pi_1 = temp;
-        pi_1_locked = false;
-
-        continue;
-      }
     }
 
-    /* The following assertions are true at this point:
-       - pi_1 is locked
-       - pi_2 is unlocked
-       - pi_1 != pi_2 */
-
-    gpr_mu_lock(&pi_2->mu);
-    pi_2_locked = true;
-
-    /* If pi_2 is not terminal node, we are not done locking this polling_island
-       yet. Release the lock and update pi_2 to the next node in the list */
-    if (pi_2->merged_to != NULL) {
-      temp = pi_2->merged_to;
-      polling_island_unref_and_unlock(pi_2, 1);
-      pi_2 = temp;
-      pi_2_locked = false;
+    next_1 = (polling_island *)gpr_atm_acq_load(&pi_1->merged_to);
+    next_2 = (polling_island *)gpr_atm_acq_load(&pi_2->merged_to);
+    if (next_1 == NULL && next_2 == NULL) {
+      break;
     }
-  }
 
-  /* At this point, either pi_1 == pi_2 AND/OR we got both locks */
-  if (pi_1 == pi_2) {
-    /* We may or may not have gotten the lock. If we didn't, walk the rest of
-      the polling_island list and get the lock */
-    GPR_ASSERT(pi_1_locked || (!pi_1_locked && !pi_2_locked));
-    if (!pi_1_locked) {
-      pi_1 = pi_2 = polling_island_update_and_lock(pi_1, 2, 0);
-    }
-  } else {
-    GPR_ASSERT(pi_1_locked && pi_2_locked);
-    /* If we swapped pi_1 and pi_2 odd number of times, do one more swap so that
-       pi_1 and pi_2 point to the same polling_island lists they started off
-       with at the beginning of this function (i.e *p and *q respectively) */
-    if (num_swaps % 2 > 0) {
-      GPR_SWAP(polling_island *, pi_1, pi_2);
-    }
+    gpr_mu_unlock(&pi_1->mu);
+    gpr_mu_unlock(&pi_2->mu);
   }
 
   *p = pi_1;
@@ -546,7 +611,7 @@ void polling_island_pair_update_and_lock(polling_island **p,
 
 polling_island *polling_island_merge(polling_island *p, polling_island *q) {
   /* Get locks on both the polling islands */
-  polling_island_pair_update_and_lock(&p, &q);
+  polling_island_lock_pair(&p, &q);
 
   if (p == q) {
     /* Nothing needs to be done here */
@@ -568,15 +633,14 @@ polling_island *polling_island_merge(polling_island *p, polling_island *q) {
   /* Wakeup all the pollers (if any) on p so that they can pickup this change */
   polling_island_add_wakeup_fd_locked(p, &polling_island_wakeup_fd);
 
-  p->merged_to = q;
+  /* Add the 'merged_to' link from p --> q */
+  gpr_atm_rel_store(&p->merged_to, q);
+  PI_ADD_REF(q, "pi_merge"); /* To account for the new incoming ref from p */
 
-  /* - The merged polling island (i.e q) inherits all the ref counts of the
-       island merging with it (i.e p)
-     - The island p will lose a ref count */
-  q->ref_cnt += p->ref_cnt;
-  polling_island_unref_and_unlock(p, 1); /* Decrement refcount */
-  polling_island_unref_and_unlock(q, 0); /* Just Unlock. Don't decrement ref */
+  gpr_mu_unlock(&p->mu);
+  gpr_mu_unlock(&q->mu);
 
+  /* Return the merged polling island */
   return q;
 }
 
@@ -667,6 +731,7 @@ static void unref_by(grpc_fd *fd, int n) {
     fd->freelist_next = fd_freelist;
     fd_freelist = fd;
     grpc_iomgr_unregister_object(&fd->iomgr_object);
+
     gpr_mu_unlock(&fd_freelist_mu);
   } else {
     GPR_ASSERT(old > n);
@@ -785,16 +850,20 @@ static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
   REF_BY(fd, 1, reason);
 
   /* Remove the fd from the polling island:
-     - Update the fd->polling_island to point to the latest polling island
-     - Remove the fd from the polling island.
-     - Remove a ref to the polling island and set fd->polling_island to NULL */
+     - Get a lock on the latest polling island (i.e the last island in the
+       linked list pointed by fd->polling_island). This is the island that
+       would actually contain the fd
+     - Remove the fd from the latest polling island
+     - Unlock the latest polling island
+     - Set fd->polling_island to NULL (but remove the ref on the polling island
+       before doing this.) */
   gpr_mu_lock(&fd->pi_mu);
   if (fd->polling_island != NULL) {
-    fd->polling_island =
-        polling_island_update_and_lock(fd->polling_island, 1, 0);
-    polling_island_remove_fd_locked(fd->polling_island, fd, is_fd_closed);
+    polling_island *pi_latest = polling_island_lock(fd->polling_island);
+    polling_island_remove_fd_locked(pi_latest, fd, is_fd_closed);
+    gpr_mu_unlock(&pi_latest->mu);
 
-    polling_island_unref_and_unlock(fd->polling_island, 1);
+    PI_UNREF(fd->polling_island, "fd_orphan");
     fd->polling_island = NULL;
   }
   gpr_mu_unlock(&fd->pi_mu);
@@ -1050,17 +1119,13 @@ static void fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
   gpr_mu_unlock(&fd->mu);
 }
 
-/* Release the reference to pollset->polling_island and set it to NULL.
-   pollset->mu must be held */
-static void pollset_release_polling_island_locked(grpc_pollset *pollset) {
-  gpr_mu_lock(&pollset->pi_mu);
-  if (pollset->polling_island) {
-    pollset->polling_island =
-        polling_island_update_and_lock(pollset->polling_island, 1, 0);
-    polling_island_unref_and_unlock(pollset->polling_island, 1);
-    pollset->polling_island = NULL;
+static void pollset_release_polling_island(grpc_pollset *ps, char *reason) {
+  gpr_mu_lock(&ps->pi_mu);
+  if (ps->polling_island != NULL) {
+    PI_UNREF(ps->polling_island, reason);
   }
-  gpr_mu_unlock(&pollset->pi_mu);
+  ps->polling_island = NULL;
+  gpr_mu_unlock(&ps->pi_mu);
 }
 
 static void finish_shutdown_locked(grpc_exec_ctx *exec_ctx,
@@ -1069,8 +1134,9 @@ static void finish_shutdown_locked(grpc_exec_ctx *exec_ctx,
   GPR_ASSERT(!pollset_has_workers(pollset));
 
   pollset->finish_shutdown_called = true;
-  pollset_release_polling_island_locked(pollset);
 
+  /* Release the ref and set pollset->polling_island to NULL */
+  pollset_release_polling_island(pollset, "ps_shutdown");
   grpc_exec_ctx_enqueue(exec_ctx, pollset->shutdown_done, true, NULL);
 }
 
@@ -1110,7 +1176,7 @@ static void pollset_reset(grpc_pollset *pollset) {
   pollset->finish_shutdown_called = false;
   pollset->kicked_without_pollers = false;
   pollset->shutdown_done = NULL;
-  pollset_release_polling_island_locked(pollset);
+  pollset_release_polling_island(pollset, "ps_reset");
 }
 
 #define GRPC_EPOLL_MAX_EVENTS 1000
@@ -1124,28 +1190,37 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
   GPR_TIMER_BEGIN("pollset_work_and_unlock", 0);
 
   /* We need to get the epoll_fd to wait on. The epoll_fd is in inside the
-     polling island pointed by pollset->polling_island.
+     latest polling island pointed by pollset->polling_island.
      Acquire the following locks:
      - pollset->mu (which we already have)
      - pollset->pi_mu
-     - pollset->polling_island->mu (call polling_island_update_and_lock())*/
+     - pollset->polling_island lock  */
   gpr_mu_lock(&pollset->pi_mu);
 
-  pi = pollset->polling_island;
-  if (pi == NULL) {
-    pi = polling_island_create(NULL, 1);
+  if (pollset->polling_island == NULL) {
+    pollset->polling_island = polling_island_create(NULL);
+    PI_ADD_REF(pollset->polling_island, "ps");
   }
 
-  /* In addition to locking the polling island, add a ref so that the island
-     does not get destroyed (which means the epoll_fd won't be closed) while
-     we are are doing an epoll_wait() on the epoll_fd */
-  pi = polling_island_update_and_lock(pi, 1, 1);
+  pi = polling_island_lock(pollset->polling_island);
   epoll_fd = pi->epoll_fd;
 
-  /* Update the pollset->polling_island */
-  pollset->polling_island = pi;
+  /* Update the pollset->polling_island since the island being pointed by
+     pollset->polling_island may not be the latest (i.e pi) */
+  if (pollset->polling_island != pi) {
+    /* Always do PI_ADD_REF before PI_UNREF because PI_UNREF may cause the
+       polling island to be deleted */
+    PI_ADD_REF(pi, "ps");
+    PI_UNREF(pollset->polling_island, "ps");
+    pollset->polling_island = pi;
+  }
+
+  /* Add an extra ref so that the island does not get destroyed (which means
+     the epoll_fd won't be closed) while we are are doing an epoll_wait() on the
+     epoll_fd */
+  PI_ADD_REF(pi, "ps_work");
 
-  polling_island_unref_and_unlock(pollset->polling_island, 0); /* Keep the ref*/
+  gpr_mu_unlock(&pi->mu);
   gpr_mu_unlock(&pollset->pi_mu);
   gpr_mu_unlock(&pollset->mu);
 
@@ -1193,14 +1268,12 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
 
   GPR_ASSERT(pi != NULL);
 
-  /* Before leaving, release the extra ref we added to the polling island */
-  /* It is important to note that at this point 'pi' may not be the same as
-   * pollset->polling_island. This is because pollset->polling_island pointer
-   * gets updated whenever the underlying polling island is merged with another
-   * island and while we are doing epoll_wait() above, the polling island may
-   * have been merged */
-  pi = polling_island_update_and_lock(pi, 1, 0); /* No new ref added */
-  polling_island_unref_and_unlock(pi, 1);
+  /* Before leaving, release the extra ref we added to the polling island. It
+     is important to use "pi" here (i.e our old copy of pollset->polling_island
+     that we got before releasing the polling island lock). This is because
+     pollset->polling_island pointer might get udpated in other parts of the
+     code when there is an island merge while we are doing epoll_wait() above */
+  PI_UNREF(pi, "ps_work");
 
   GPR_TIMER_END("pollset_work_and_unlock", 0);
 }
@@ -1297,20 +1370,34 @@ static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   if (fd->polling_island == pollset->polling_island) {
     pi_new = fd->polling_island;
     if (pi_new == NULL) {
-      pi_new = polling_island_create(fd, 2);
+      pi_new = polling_island_create(fd);
     }
   } else if (fd->polling_island == NULL) {
-    pi_new = polling_island_update_and_lock(pollset->polling_island, 1, 1);
-    polling_island_add_fds_locked(pollset->polling_island, &fd, 1, true);
+    pi_new = polling_island_lock(pollset->polling_island);
+    polling_island_add_fds_locked(pi_new, &fd, 1, true);
     gpr_mu_unlock(&pi_new->mu);
   } else if (pollset->polling_island == NULL) {
-    pi_new = polling_island_update_and_lock(fd->polling_island, 1, 1);
+    pi_new = polling_island_lock(fd->polling_island);
     gpr_mu_unlock(&pi_new->mu);
   } else {
     pi_new = polling_island_merge(fd->polling_island, pollset->polling_island);
   }
 
-  fd->polling_island = pollset->polling_island = pi_new;
+  if (fd->polling_island != pi_new) {
+    PI_ADD_REF(pi_new, "fd");
+    if (fd->polling_island != NULL) {
+      PI_UNREF(fd->polling_island, "fd");
+    }
+    fd->polling_island = pi_new;
+  }
+
+  if (pollset->polling_island != pi_new) {
+    PI_ADD_REF(pi_new, "ps");
+    if (pollset->polling_island != NULL) {
+      PI_UNREF(pollset->polling_island, "ps");
+    }
+    pollset->polling_island = pi_new;
+  }
 
   gpr_mu_unlock(&fd->pi_mu);
   gpr_mu_unlock(&pollset->pi_mu);
@@ -1481,28 +1568,19 @@ void *grpc_pollset_get_polling_island(grpc_pollset *ps) {
   return pi;
 }
 
-static polling_island *get_polling_island(polling_island *p) {
-  if (p == NULL) {
-    return NULL;
-  }
+bool grpc_are_polling_islands_equal(void *p, void *q) {
+  polling_island *p1 = p;
+  polling_island *p2 = q;
 
-  polling_island *next;
-  gpr_mu_lock(&p->mu);
-  while (p->merged_to != NULL) {
-    next = p->merged_to;
-    gpr_mu_unlock(&p->mu);
-    p = next;
-    gpr_mu_lock(&p->mu);
+  polling_island_lock_pair(&p1, &p2);
+  if (p1 == p2) {
+    gpr_mu_unlock(&p1->mu);
+  } else {
+    gpr_mu_unlock(&p1->mu);
+    gpr_mu_unlock(&p2->mu);
   }
-  gpr_mu_unlock(&p->mu);
-
-  return p;
-}
 
-bool grpc_are_polling_islands_equal(void *p, void *q) {
-  p = get_polling_island(p);
-  q = get_polling_island(q);
-  return p == q;
+  return p1 == p2;
 }
 
 /*******************************************************************************

From bc98af18fabd94fbc6673dc021fdc45b20432028 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Fri, 17 Jun 2016 18:38:27 -0700
Subject: [PATCH 111/280] make run_tests.py support coreclr on windows

---
 tools/run_tests/build_csharp_coreclr.bat | 44 ++++++++++++++++++++++++
 tools/run_tests/run_tests.py             | 38 ++++++++++----------
 2 files changed, 64 insertions(+), 18 deletions(-)
 create mode 100644 tools/run_tests/build_csharp_coreclr.bat

diff --git a/tools/run_tests/build_csharp_coreclr.bat b/tools/run_tests/build_csharp_coreclr.bat
new file mode 100644
index 00000000000..cead6d0e02c
--- /dev/null
+++ b/tools/run_tests/build_csharp_coreclr.bat
@@ -0,0 +1,44 @@
+@rem Copyright 2016, Google Inc.
+@rem All rights reserved.
+@rem
+@rem Redistribution and use in source and binary forms, with or without
+@rem modification, are permitted provided that the following conditions are
+@rem met:
+@rem
+@rem     * Redistributions of source code must retain the above copyright
+@rem notice, this list of conditions and the following disclaimer.
+@rem     * Redistributions in binary form must reproduce the above
+@rem copyright notice, this list of conditions and the following disclaimer
+@rem in the documentation and/or other materials provided with the
+@rem distribution.
+@rem     * Neither the name of Google Inc. nor the names of its
+@rem contributors may be used to endorse or promote products derived from
+@rem this software without specific prior written permission.
+@rem
+@rem THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+@rem "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+@rem LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+@rem A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+@rem OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+@rem SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+@rem LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+@rem DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+@rem THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+@rem (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+@rem OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+setlocal
+
+cd /d %~dp0\..\..\src\csharp
+
+dotnet restore . || goto :error
+
+dotnet build -f netstandard1.5 --configuration %MSBUILD_CONFIG% "**/project.json" || goto :error
+
+endlocal
+
+goto :EOF
+
+:error
+echo Failed!
+exit /b %errorlevel%
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 473eb460b46..3cb0be579da 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -504,13 +504,9 @@ class CSharpLanguage(object):
       self._make_options = [_windows_toolset_option(self.args.compiler),
                             _windows_arch_option(self.args.arch)]
     else:
-      if self.platform == 'linux':
-        if self.args.compiler == 'coreclr':
-          self._docker_distro = 'coreclr'
-        else:
-          self._docker_distro = 'jessie'
-      else:
-        _check_compiler(self.args.compiler, ['default'])
+      _check_compiler(self.args.compiler, ['default', 'coreclr'])
+      if self.platform == 'linux' and self.args.compiler == 'coreclr':
+        self._docker_distro = 'coreclr'
 
       if self.platform == 'mac':
         # On Mac, official distribution of mono is 32bit.
@@ -525,21 +521,22 @@ class CSharpLanguage(object):
       tests_by_assembly = json.load(f)
 
     msbuild_config = _MSBUILD_CONFIG[self.config.build_config]
-    nunit_args = ['--labels=All',
-                  '--noresult',
-                  '--workers=1']
+    nunit_args = ['--labels=All']
     assembly_subdir = 'bin/%s' % msbuild_config
     assembly_extension = '.exe'
 
     if self.args.compiler == 'coreclr':
       # TODO(jtattermusch): make the runtime string platform-specific
-      assembly_subdir += '/netstandard1.5/debian.8-x64'
-      assembly_extension = ''
-      runtime_cmd = []
-    elif self.platform == 'windows':
+      #assembly_subdir += '/netstandard1.5/debian.8-x64'
+      #assembly_extension = ''
+      assembly_subdir += '/netstandard1.5/win7-x64'
       runtime_cmd = []
     else:
-      runtime_cmd = ['mono']
+      nunit_args += ['--noresult', '--workers=1']
+      if self.platform == 'windows':
+        runtime_cmd = []
+      else:
+        runtime_cmd = ['mono']
 
     specs = []
     for assembly in tests_by_assembly.iterkeys():
@@ -590,7 +587,10 @@ class CSharpLanguage(object):
 
   def build_steps(self):
     if self.args.compiler == 'coreclr':
-      return [['tools/run_tests/build_csharp_coreclr.sh']]
+      if self.platform == 'windows':
+        return [['tools\\run_tests\\build_csharp_coreclr.bat']]
+      else:
+        return [['tools/run_tests/build_csharp_coreclr.sh']]
     else:
       if self.platform == 'windows':
         return [[_windows_build_bat(self.args.compiler),
@@ -752,7 +752,8 @@ def _check_arch_option(arch):
 
 def _windows_build_bat(compiler):
   """Returns name of build.bat for selected compiler."""
-  if compiler == 'default' or compiler == 'vs2013':
+  # For CoreCLR, fall back to the default compiler for C core
+  if compiler == 'default' or compiler == 'vs2013' or compiler == 'coreclr':
     return 'vsprojects\\build_vs2013.bat'
   elif compiler == 'vs2015':
     return 'vsprojects\\build_vs2015.bat'
@@ -765,7 +766,8 @@ def _windows_build_bat(compiler):
 
 def _windows_toolset_option(compiler):
   """Returns msbuild PlatformToolset for selected compiler."""
-  if compiler == 'default' or compiler == 'vs2013':
+  # For CoreCLR, fall back to the default compiler for C core
+  if compiler == 'default' or compiler == 'vs2013' or compiler == 'coreclr':
     return '/p:PlatformToolset=v120'
   elif compiler == 'vs2015':
     return '/p:PlatformToolset=v140'

From 74330130a3becaced929b2502fdea72bc5589314 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Mon, 20 Jun 2016 15:54:27 -0700
Subject: [PATCH 112/280] improve project.json files

---
 src/csharp/Grpc.Core.Tests/project.json       |  1 -
 src/csharp/Grpc.Core/project.json             |  1 -
 src/csharp/Grpc.Dotnet.sln                    |  6 ++++++
 .../Grpc.Examples.MathClient/project.json     |  1 -
 .../Grpc.Examples.MathServer/project.json     |  1 -
 src/csharp/Grpc.Examples.Tests/project.json   |  1 -
 src/csharp/Grpc.Examples/project.json         |  4 ----
 .../Grpc.HealthCheck.Tests/project.json       |  1 -
 src/csharp/Grpc.HealthCheck/project.json      |  3 ---
 .../project.json                              |  1 -
 .../project.json                              |  1 -
 .../project.json                              |  1 -
 ...Grpc.IntegrationTesting.StressClient.xproj | 19 +++++++++++++++++++
 .../project.json                              |  1 -
 .../Grpc.IntegrationTesting/project.json      |  1 -
 15 files changed, 25 insertions(+), 18 deletions(-)
 create mode 100644 src/csharp/Grpc.IntegrationTesting.StressClient/Grpc.IntegrationTesting.StressClient.xproj

diff --git a/src/csharp/Grpc.Core.Tests/project.json b/src/csharp/Grpc.Core.Tests/project.json
index a59e6390d9d..95f40fdbbde 100644
--- a/src/csharp/Grpc.Core.Tests/project.json
+++ b/src/csharp/Grpc.Core.Tests/project.json
@@ -1,6 +1,5 @@
 {
   "buildOptions": {
-    "compile": "**/*.cs",
     "copyToOutput": {
       "mappings": {
         "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
diff --git a/src/csharp/Grpc.Core/project.json b/src/csharp/Grpc.Core/project.json
index b5b7722bba2..ba3dc15495d 100644
--- a/src/csharp/Grpc.Core/project.json
+++ b/src/csharp/Grpc.Core/project.json
@@ -22,7 +22,6 @@
     }
   },
   "buildOptions": {
-    "compile": "**/*.cs",
     "embed": [ "../../../etc/roots.pem" ]
   },
   "dependencies": {
diff --git a/src/csharp/Grpc.Dotnet.sln b/src/csharp/Grpc.Dotnet.sln
index 6a7e2e27482..98b3cd54abb 100644
--- a/src/csharp/Grpc.Dotnet.sln
+++ b/src/csharp/Grpc.Dotnet.sln
@@ -29,6 +29,8 @@ Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Grpc.IntegrationTesting.Qps
 EndProject
 Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Grpc.IntegrationTesting.Server", "Grpc.IntegrationTesting.Server\Grpc.IntegrationTesting.Server.xproj", "{881F7AD1-A84E-47A2-9402-115C63C4031E}"
 EndProject
+Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Grpc.IntegrationTesting.StressClient", "Grpc.IntegrationTesting.StressClient\Grpc.IntegrationTesting.StressClient.xproj", "{0EBC910B-8867-4D3E-8686-91F34183D839}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -87,6 +89,10 @@ Global
 		{881F7AD1-A84E-47A2-9402-115C63C4031E}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{881F7AD1-A84E-47A2-9402-115C63C4031E}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{881F7AD1-A84E-47A2-9402-115C63C4031E}.Release|Any CPU.Build.0 = Release|Any CPU
+		{0EBC910B-8867-4D3E-8686-91F34183D839}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{0EBC910B-8867-4D3E-8686-91F34183D839}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{0EBC910B-8867-4D3E-8686-91F34183D839}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{0EBC910B-8867-4D3E-8686-91F34183D839}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/src/csharp/Grpc.Examples.MathClient/project.json b/src/csharp/Grpc.Examples.MathClient/project.json
index 9c070c76ba5..4c1ea780412 100644
--- a/src/csharp/Grpc.Examples.MathClient/project.json
+++ b/src/csharp/Grpc.Examples.MathClient/project.json
@@ -1,6 +1,5 @@
 {
   "buildOptions": {
-    "compile": "**/*.cs",
     "copyToOutput": {
       "mappings": {
         "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
diff --git a/src/csharp/Grpc.Examples.MathServer/project.json b/src/csharp/Grpc.Examples.MathServer/project.json
index 9c070c76ba5..4c1ea780412 100644
--- a/src/csharp/Grpc.Examples.MathServer/project.json
+++ b/src/csharp/Grpc.Examples.MathServer/project.json
@@ -1,6 +1,5 @@
 {
   "buildOptions": {
-    "compile": "**/*.cs",
     "copyToOutput": {
       "mappings": {
         "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
diff --git a/src/csharp/Grpc.Examples.Tests/project.json b/src/csharp/Grpc.Examples.Tests/project.json
index 7dd938cfb16..f41be82bd53 100644
--- a/src/csharp/Grpc.Examples.Tests/project.json
+++ b/src/csharp/Grpc.Examples.Tests/project.json
@@ -1,6 +1,5 @@
 {
   "buildOptions": {
-    "compile": "**/*.cs",
     "copyToOutput": {
       "mappings": {
         "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
diff --git a/src/csharp/Grpc.Examples/project.json b/src/csharp/Grpc.Examples/project.json
index 610712f6460..fe580eb165b 100644
--- a/src/csharp/Grpc.Examples/project.json
+++ b/src/csharp/Grpc.Examples/project.json
@@ -1,8 +1,4 @@
 {
-  "buildOptions": {
-    "compile": "**/*.cs"
-  },
-
   "dependencies": {
     "Grpc.Core": {
       "target": "project"
diff --git a/src/csharp/Grpc.HealthCheck.Tests/project.json b/src/csharp/Grpc.HealthCheck.Tests/project.json
index be2b3a0459f..5a5f063258a 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/project.json
+++ b/src/csharp/Grpc.HealthCheck.Tests/project.json
@@ -1,6 +1,5 @@
 {
   "buildOptions": {
-    "compile": "**/*.cs",
     "copyToOutput": {
       "mappings": {
         "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
diff --git a/src/csharp/Grpc.HealthCheck/project.json b/src/csharp/Grpc.HealthCheck/project.json
index c69db5f997d..e9fdfad4731 100644
--- a/src/csharp/Grpc.HealthCheck/project.json
+++ b/src/csharp/Grpc.HealthCheck/project.json
@@ -12,9 +12,6 @@
     "requireLicenseAcceptance": false,
     "tags": [ "gRPC health check" ]
   },
-  "buildOptions": {
-    "compile": "**/*.cs"
-  },
   "dependencies": {
     "Grpc.Core": "0.14.0-anexperiment",
     "Google.Protobuf": "3.0.0-beta3"
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/project.json b/src/csharp/Grpc.IntegrationTesting.Client/project.json
index fabf906a738..b19b76c6ccf 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Client/project.json
@@ -1,6 +1,5 @@
 {
   "buildOptions": {
-    "compile": "**/*.cs",
     "copyToOutput": {
       "mappings": {
         "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
index fabf906a738..b19b76c6ccf 100644
--- a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
@@ -1,6 +1,5 @@
 {
   "buildOptions": {
-    "compile": "**/*.cs",
     "copyToOutput": {
       "mappings": {
         "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/project.json b/src/csharp/Grpc.IntegrationTesting.Server/project.json
index fabf906a738..b19b76c6ccf 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Server/project.json
@@ -1,6 +1,5 @@
 {
   "buildOptions": {
-    "compile": "**/*.cs",
     "copyToOutput": {
       "mappings": {
         "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
diff --git a/src/csharp/Grpc.IntegrationTesting.StressClient/Grpc.IntegrationTesting.StressClient.xproj b/src/csharp/Grpc.IntegrationTesting.StressClient/Grpc.IntegrationTesting.StressClient.xproj
new file mode 100644
index 00000000000..2f4fdcbb470
--- /dev/null
+++ b/src/csharp/Grpc.IntegrationTesting.StressClient/Grpc.IntegrationTesting.StressClient.xproj
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0.25123" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0.25123</VisualStudioVersion>
+    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DotNet\Microsoft.DotNet.Props" Condition="'$(VSToolsPath)' != ''" />
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>0ebc910b-8867-4d3e-8686-91f34183d839</ProjectGuid>
+    <RootNamespace>Grpc.IntegrationTesting.StressClient</RootNamespace>
+    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">.\obj</BaseIntermediateOutputPath>
+    <OutputPath Condition="'$(OutputPath)'=='' ">.\bin\</OutputPath>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <SchemaVersion>2.0</SchemaVersion>
+  </PropertyGroup>
+  <Import Project="$(VSToolsPath)\DotNet\Microsoft.DotNet.targets" Condition="'$(VSToolsPath)' != ''" />
+</Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.StressClient/project.json b/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
index fabf906a738..b19b76c6ccf 100644
--- a/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
@@ -1,6 +1,5 @@
 {
   "buildOptions": {
-    "compile": "**/*.cs",
     "copyToOutput": {
       "mappings": {
         "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
diff --git a/src/csharp/Grpc.IntegrationTesting/project.json b/src/csharp/Grpc.IntegrationTesting/project.json
index d5ac6f108ba..be857279892 100644
--- a/src/csharp/Grpc.IntegrationTesting/project.json
+++ b/src/csharp/Grpc.IntegrationTesting/project.json
@@ -1,6 +1,5 @@
 {
   "buildOptions": {
-    "compile": "**/*.cs",
     "copyToOutput": {
       "mappings": {
         "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",

From aa338326ed399832394078282664c6bcf66d11e7 Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Mon, 20 Jun 2016 16:47:40 -0700
Subject: [PATCH 113/280] Revert ProtoService.m, add an exception for its
 incompatible-pointer-types warning

---
 src/objective-c/ProtoRPC/ProtoService.m | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/objective-c/ProtoRPC/ProtoService.m b/src/objective-c/ProtoRPC/ProtoService.m
index 4a14570d818..cd9bc7aeac4 100644
--- a/src/objective-c/ProtoRPC/ProtoService.m
+++ b/src/objective-c/ProtoRPC/ProtoService.m
@@ -65,19 +65,22 @@
   return self;
 }
 
-- (GRPCProtoCall *)RPCToMethod:(NSString *)method
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wincompatible-pointer-types"
+- (ProtoRPC *)RPCToMethod:(NSString *)method
            requestsWriter:(GRXWriter *)requestsWriter
             responseClass:(Class)responseClass
        responsesWriteable:(id<GRXWriteable>)responsesWriteable {
-  GRPCProtoMethod *methodName = [[GRPCProtoMethod alloc] initWithPackage:_packageName
+  ProtoMethod *methodName = [[ProtoMethod alloc] initWithPackage:_packageName
                                                          service:_serviceName
                                                           method:method];
-  return [[GRPCProtoCall alloc] initWithHost:_host
+  return [[ProtoRPC alloc] initWithHost:_host
                                  method:methodName
                          requestsWriter:requestsWriter
                           responseClass:responseClass
                      responsesWriteable:responsesWriteable];
 }
+#pragma clang diagnostic pop
 @end
 
 @implementation GRPCProtoService

From bbe601ab7ca1ba763f95415fbcd391947987341a Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Mon, 20 Jun 2016 17:49:34 -0700
Subject: [PATCH 114/280] add a hack

---
 tools/run_tests/build_csharp_coreclr.sh | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/run_tests/build_csharp_coreclr.sh b/tools/run_tests/build_csharp_coreclr.sh
index 733b1a2083c..68c19cb6c9d 100755
--- a/tools/run_tests/build_csharp_coreclr.sh
+++ b/tools/run_tests/build_csharp_coreclr.sh
@@ -36,3 +36,7 @@ cd $(dirname $0)/../../src/csharp
 dotnet restore .
 
 dotnet build -f netstandard1.5 --configuration $MSBUILD_CONFIG '**/project.json'
+
+# Grpc.IntegrationTesting doesn't get built by the previous command for some reason.
+# TODO(jtattermusch): get rid of the hack
+dotnet build -f netstandard1.5 --configuration $MSBUILD_CONFIG Grpc.IntegrationTesting/project.json

From 64c137c4f5e23e898d5fbc6306b191daaf147ec0 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Mon, 20 Jun 2016 17:54:19 -0700
Subject: [PATCH 115/280] select runtime dir

---
 tools/run_tests/run_tests.py | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 3cb0be579da..c5cf0135f73 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -526,10 +526,11 @@ class CSharpLanguage(object):
     assembly_extension = '.exe'
 
     if self.args.compiler == 'coreclr':
-      # TODO(jtattermusch): make the runtime string platform-specific
-      #assembly_subdir += '/netstandard1.5/debian.8-x64'
-      #assembly_extension = ''
-      assembly_subdir += '/netstandard1.5/win7-x64'
+      if self.platform == 'linux':
+        assembly_subdir += '/netstandard1.5/debian.8-x64'
+        assembly_extension = ''
+      else:
+        assembly_subdir += '/netstandard1.5/win7-x64'
       runtime_cmd = []
     else:
       nunit_args += ['--noresult', '--workers=1']

From 74ea91d55229a654d0987d2f39cddf8514926f14 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Mon, 20 Jun 2016 18:19:41 -0700
Subject: [PATCH 116/280] use qps_json_driver for latency profiling

---
 .../latency_profile/run_latency_profile.sh    | 94 ++++++++++++-------
 1 file changed, 58 insertions(+), 36 deletions(-)

diff --git a/tools/profiling/latency_profile/run_latency_profile.sh b/tools/profiling/latency_profile/run_latency_profile.sh
index 54a25a9cb73..40c6fcb4314 100755
--- a/tools/profiling/latency_profile/run_latency_profile.sh
+++ b/tools/profiling/latency_profile/run_latency_profile.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-# Copyright 2015, Google Inc.
+# Copyright 2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -28,17 +28,61 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+# format argument via
+# $ echo '{...}' | python -mjson.tool
+read -r -d '' SCENARIOS_JSON_ARG <<'EOF'
+{
+    "scenarios": [
+        {
+            "benchmark_seconds": 5,
+            "client_config": {
+                "client_channels": 1,
+                "client_type": "SYNC_CLIENT",
+                "histogram_params": {
+                    "max_possible": 60000000000.0,
+                    "resolution": 0.01
+                },
+                "load_params": {
+                    "closed_loop": {}
+                },
+                "outstanding_rpcs_per_channel": 1,
+                "payload_config": {
+                    "simple_params": {
+                        "req_size": 0,
+                        "resp_size": 0
+                    }
+                },
+                "rpc_type": "UNARY",
+                "security_params": {
+                    "server_host_override": "foo.test.google.fr",
+                    "use_test_ca": true
+                }
+            },
+            "name": "cpp_protobuf_sync_unary_ping_pong_secure",
+            "num_clients": 1,
+            "num_servers": 1,
+            "server_config": {
+                "core_limit": 1,
+                "security_params": {
+                    "server_host_override": "foo.test.google.fr",
+                    "use_test_ca": true
+                },
+                "server_type": "SYNC_SERVER"
+            },
+            "spawn_local_worker_count": 2,
+            "warmup_seconds": 5
+        }
+    ]
+}
+
+EOF
+
 set -ex
 
 cd $(dirname $0)/../../..
 
-BINS="sync_unary_ping_pong_test sync_streaming_ping_pong_test"
 CPUS=`python -c 'import multiprocessing; print multiprocessing.cpu_count()'`
 
-make CONFIG=basicprof -j$CPUS $BINS
-
-mkdir -p reports
-
 # try to use pypy for generating reports
 # each trace dumps 7-8gig of text to disk, and processing this into a report is
 # heavyweight - so any speed boost is worthwhile
@@ -49,35 +93,13 @@ else
   PYTHON=python2.7
 fi
 
-# start processes, interleaving report index generation
+make CONFIG=basicprof -j$CPUS qps_json_driver
+
+mkdir -p reports
 echo '<html><head></head><body>' > reports/index.html
-for bin in $BINS
-do
-  bins/basicprof/$bin
-  mv latency_trace.txt $bin.trace
-  echo "<a href='$bin.txt'>$bin</a><br/>" >> reports/index.html
-done
-pids=""
-# generate report pages... this will take some time
-# run them in parallel: they take 1 cpu each
-for bin in $BINS
-do
-  $PYTHON tools/profiling/latency_profile/profile_analyzer.py \
-    --source=$bin.trace --fmt=simple > reports/$bin.txt &
-  pids+=" $!"
-done
+bins/basicprof/qps_json_driver --scenarios_json="$SCENARIOS_JSON_ARG"
+echo '<pre>' >> reports/index.html
+$PYTHON tools/profiling/latency_profile/profile_analyzer.py \
+    --source=latency_trace.txt --fmt=simple >> reports/index.html
+echo '</pre>' >> reports/index.html
 echo '</body></html>' >> reports/index.html
-
-# make sure we kill the report generation if something goes wrong
-trap "kill $pids || true" 0
-
-# finally, wait for the background report generation to finish
-for pid in $pids
-do
-	if wait $pid
-	then
-		echo "Finished $pid"
-	else
-		exit 1
-	fi
-done

From cddf697ab44a7bab1821915e1e3f6a0f08ca1706 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Tue, 21 Jun 2016 08:27:07 -0700
Subject: [PATCH 117/280] Fix refcounting tsan failures and grab pollset lock
 in the function pollset_add_fd

---
 src/core/lib/iomgr/ev_epoll_linux.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 72288889c02..7cc69c876db 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -291,11 +291,11 @@ void pi_unref_dbg(polling_island *pi, int ref_cnt, char *reason, char *file,
 #endif
 
 long pi_add_ref(polling_island *pi, int ref_cnt) {
-  return gpr_atm_no_barrier_fetch_add(&pi->ref_count, ref_cnt);
+  return gpr_atm_full_fetch_add(&pi->ref_count, ref_cnt);
 }
 
 long pi_unref(polling_island *pi, int ref_cnt) {
-  long old_cnt = gpr_atm_no_barrier_fetch_add(&pi->ref_count, -ref_cnt);
+  long old_cnt = gpr_atm_full_fetch_add(&pi->ref_count, -ref_cnt);
 
   /* If ref count went to zero, delete the polling island. Note that this need
      not be done under a lock. Once the ref count goes to zero, we are
@@ -311,6 +311,8 @@ long pi_unref(polling_island *pi, int ref_cnt) {
     if (next != NULL) {
       PI_UNREF(next, "pi_delete"); /* Recursive call */
     }
+  } else {
+    GPR_ASSERT(old_cnt > ref_cnt);
   }
 
   return old_cnt;
@@ -445,8 +447,8 @@ static polling_island *polling_island_create(grpc_fd *initial_fd) {
     pi->fds = NULL;
   }
 
-  gpr_atm_no_barrier_store(&pi->ref_count, 0);
-  gpr_atm_no_barrier_store(&pi->merged_to, NULL);
+  gpr_atm_rel_store(&pi->ref_count, 0);
+  gpr_atm_rel_store(&pi->merged_to, NULL);
 
   pi->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
 
@@ -1347,7 +1349,7 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 
 static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                            grpc_fd *fd) {
-  /* TODO sreek - Double check if we need to get a pollset->mu lock here */
+  gpr_mu_lock(&pollset->mu);
   gpr_mu_lock(&pollset->pi_mu);
   gpr_mu_lock(&fd->pi_mu);
 
@@ -1401,6 +1403,7 @@ static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 
   gpr_mu_unlock(&fd->pi_mu);
   gpr_mu_unlock(&pollset->pi_mu);
+  gpr_mu_unlock(&pollset->mu);
 }
 
 /*******************************************************************************

From e63246d1007516ca5c74043139304a371c0ce672 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Tue, 21 Jun 2016 09:03:11 -0700
Subject: [PATCH 118/280] clang-format

---
 test/core/iomgr/tcp_server_posix_test.c | 2 +-
 test/core/surface/server_chttp2_test.c  | 2 +-
 test/core/util/test_tcp_server.c        | 4 ++--
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/test/core/iomgr/tcp_server_posix_test.c b/test/core/iomgr/tcp_server_posix_test.c
index 6361e7afcbc..6e2d1d0fc9e 100644
--- a/test/core/iomgr/tcp_server_posix_test.c
+++ b/test/core/iomgr/tcp_server_posix_test.c
@@ -166,7 +166,7 @@ static void test_no_op_with_port_and_start(void) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   struct sockaddr_in addr;
   grpc_tcp_server *s;
-  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, NULL,  &s));
+  GPR_ASSERT(GRPC_ERROR_NONE == grpc_tcp_server_create(NULL, NULL, &s));
   LOG_TEST("test_no_op_with_port_and_start");
   int port;
 
diff --git a/test/core/surface/server_chttp2_test.c b/test/core/surface/server_chttp2_test.c
index 40cfa6b5989..6310b6f00b0 100644
--- a/test/core/surface/server_chttp2_test.c
+++ b/test/core/surface/server_chttp2_test.c
@@ -54,7 +54,7 @@ void test_add_same_port_twice() {
   a.key = GRPC_ARG_ALLOW_REUSEPORT;
   a.value.integer = 0;
   grpc_channel_args args = {1, &a};
-  
+
   int port = grpc_pick_unused_port_or_die();
   char *addr = NULL;
   grpc_completion_queue *cq = grpc_completion_queue_create(NULL);
diff --git a/test/core/util/test_tcp_server.c b/test/core/util/test_tcp_server.c
index c1d307fc779..8a0b3932d86 100644
--- a/test/core/util/test_tcp_server.c
+++ b/test/core/util/test_tcp_server.c
@@ -72,8 +72,8 @@ void test_tcp_server_start(test_tcp_server *server, int port) {
   addr.sin_port = htons((uint16_t)port);
   memset(&addr.sin_addr, 0, sizeof(addr.sin_addr));
 
-  grpc_error *error =
-      grpc_tcp_server_create(&server->shutdown_complete, NULL, &server->tcp_server);
+  grpc_error *error = grpc_tcp_server_create(&server->shutdown_complete, NULL,
+                                             &server->tcp_server);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   error = grpc_tcp_server_add_port(server->tcp_server, &addr, sizeof(addr),
                                    &port_added);

From 39f9ac9b2a51fdcdbd3693d8a04eec3473eb9438 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Thu, 16 Jun 2016 16:53:59 -0700
Subject: [PATCH 119/280] Test polling island merges

---
 Makefile                                 |  36 ++++
 build.yaml                               |  12 ++
 src/core/lib/iomgr/ev_epoll_linux.c      |  51 +++++-
 src/core/lib/iomgr/ev_epoll_linux.h      |   6 +
 src/core/lib/iomgr/ev_posix.c            |   7 +
 src/core/lib/iomgr/ev_posix.h            |   3 +
 test/core/iomgr/ev_epoll_linux_test.c    | 222 +++++++++++++++++++++++
 tools/run_tests/sources_and_headers.json |  16 ++
 tools/run_tests/tests.json               |  15 ++
 9 files changed, 366 insertions(+), 2 deletions(-)
 create mode 100644 test/core/iomgr/ev_epoll_linux_test.c

diff --git a/Makefile b/Makefile
index e615704395b..825684cc2dd 100644
--- a/Makefile
+++ b/Makefile
@@ -905,6 +905,7 @@ dns_resolver_connectivity_test: $(BINDIR)/$(CONFIG)/dns_resolver_connectivity_te
 dns_resolver_test: $(BINDIR)/$(CONFIG)/dns_resolver_test
 dualstack_socket_test: $(BINDIR)/$(CONFIG)/dualstack_socket_test
 endpoint_pair_test: $(BINDIR)/$(CONFIG)/endpoint_pair_test
+ev_epoll_linux_test: $(BINDIR)/$(CONFIG)/ev_epoll_linux_test
 fd_conservation_posix_test: $(BINDIR)/$(CONFIG)/fd_conservation_posix_test
 fd_posix_test: $(BINDIR)/$(CONFIG)/fd_posix_test
 fling_client: $(BINDIR)/$(CONFIG)/fling_client
@@ -1242,6 +1243,7 @@ buildtests_c: privatelibs_c \
   $(BINDIR)/$(CONFIG)/dns_resolver_test \
   $(BINDIR)/$(CONFIG)/dualstack_socket_test \
   $(BINDIR)/$(CONFIG)/endpoint_pair_test \
+  $(BINDIR)/$(CONFIG)/ev_epoll_linux_test \
   $(BINDIR)/$(CONFIG)/fd_conservation_posix_test \
   $(BINDIR)/$(CONFIG)/fd_posix_test \
   $(BINDIR)/$(CONFIG)/fling_client \
@@ -1512,6 +1514,8 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/dualstack_socket_test || ( echo test dualstack_socket_test failed ; exit 1 )
 	$(E) "[RUN]     Testing endpoint_pair_test"
 	$(Q) $(BINDIR)/$(CONFIG)/endpoint_pair_test || ( echo test endpoint_pair_test failed ; exit 1 )
+	$(E) "[RUN]     Testing ev_epoll_linux_test"
+	$(Q) $(BINDIR)/$(CONFIG)/ev_epoll_linux_test || ( echo test ev_epoll_linux_test failed ; exit 1 )
 	$(E) "[RUN]     Testing fd_conservation_posix_test"
 	$(Q) $(BINDIR)/$(CONFIG)/fd_conservation_posix_test || ( echo test fd_conservation_posix_test failed ; exit 1 )
 	$(E) "[RUN]     Testing fd_posix_test"
@@ -7130,6 +7134,38 @@ endif
 endif
 
 
+EV_EPOLL_LINUX_TEST_SRC = \
+    test/core/iomgr/ev_epoll_linux_test.c \
+
+EV_EPOLL_LINUX_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(EV_EPOLL_LINUX_TEST_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/ev_epoll_linux_test: openssl_dep_error
+
+else
+
+
+
+$(BINDIR)/$(CONFIG)/ev_epoll_linux_test: $(EV_EPOLL_LINUX_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LD) $(LDFLAGS) $(EV_EPOLL_LINUX_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/ev_epoll_linux_test
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/core/iomgr/ev_epoll_linux_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+
+deps_ev_epoll_linux_test: $(EV_EPOLL_LINUX_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(EV_EPOLL_LINUX_TEST_OBJS:.o=.dep)
+endif
+endif
+
+
 FD_CONSERVATION_POSIX_TEST_SRC = \
     test/core/iomgr/fd_conservation_posix_test.c \
 
diff --git a/build.yaml b/build.yaml
index 7790e0c5174..84f4ea521be 100644
--- a/build.yaml
+++ b/build.yaml
@@ -1407,6 +1407,18 @@ targets:
   - grpc
   - gpr_test_util
   - gpr
+- name: ev_epoll_linux_test
+  build: test
+  language: c
+  src:
+  - test/core/iomgr/ev_epoll_linux_test.c
+  deps:
+  - grpc_test_util
+  - grpc
+  - gpr_test_util
+  - gpr
+  platforms:
+  - linux
 - name: fd_conservation_posix_test
   build: test
   language: c
diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 1fb59474640..ed2c494b783 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -317,8 +317,9 @@ static void polling_island_remove_all_fds_locked(polling_island *pi,
     if (err < 0 && errno != ENOENT) {
       /* TODO: sreek - We need a better way to bubble up this error instead of
       * just logging a message */
-      gpr_log(GPR_ERROR, "epoll_ctl deleting fds[%zu]: %d failed with error: %s",
-              i, pi->fds[i]->fd, strerror(errno));
+      gpr_log(GPR_ERROR,
+              "epoll_ctl deleting fds[%zu]: %d failed with error: %s", i,
+              pi->fds[i]->fd, strerror(errno));
     }
 
     if (remove_fd_refs) {
@@ -1458,6 +1459,52 @@ static void pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx,
   gpr_mu_unlock(&bag->mu);
 }
 
+/* Test helper functions
+ * */
+void *grpc_fd_get_polling_island(grpc_fd *fd) {
+  polling_island *pi;
+
+  gpr_mu_lock(&fd->pi_mu);
+  pi = fd->polling_island;
+  gpr_mu_unlock(&fd->pi_mu);
+
+  return pi;
+}
+
+void *grpc_pollset_get_polling_island(grpc_pollset *ps) {
+  polling_island *pi;
+
+  gpr_mu_lock(&ps->pi_mu);
+  pi = ps->polling_island;
+  gpr_mu_unlock(&ps->pi_mu);
+
+  return pi;
+}
+
+static polling_island *get_polling_island(polling_island *p) {
+  if (p == NULL) {
+    return NULL;
+  }
+
+  polling_island *next;
+  gpr_mu_lock(&p->mu);
+  while (p->merged_to != NULL) {
+    next = p->merged_to;
+    gpr_mu_unlock(&p->mu);
+    p = next;
+    gpr_mu_lock(&p->mu);
+  }
+  gpr_mu_unlock(&p->mu);
+
+  return p;
+}
+
+bool grpc_are_polling_islands_equal(void *p, void *q) {
+  p = get_polling_island(p);
+  q = get_polling_island(q);
+  return p == q;
+}
+
 /*******************************************************************************
  * Event engine binding
  */
diff --git a/src/core/lib/iomgr/ev_epoll_linux.h b/src/core/lib/iomgr/ev_epoll_linux.h
index 8c819975a4c..7a494aba198 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.h
+++ b/src/core/lib/iomgr/ev_epoll_linux.h
@@ -38,4 +38,10 @@
 
 const grpc_event_engine_vtable *grpc_init_epoll_linux(void);
 
+#ifdef GPR_LINUX_EPOLL
+void *grpc_fd_get_polling_island(grpc_fd *fd);
+void *grpc_pollset_get_polling_island(grpc_pollset *ps);
+bool grpc_are_polling_islands_equal(void *p, void *q);
+#endif /* defined(GPR_LINUX_EPOLL) */
+
 #endif /* GRPC_CORE_LIB_IOMGR_EV_EPOLL_LINUX_H */
diff --git a/src/core/lib/iomgr/ev_posix.c b/src/core/lib/iomgr/ev_posix.c
index 2b15967adcc..5b20600a6f7 100644
--- a/src/core/lib/iomgr/ev_posix.c
+++ b/src/core/lib/iomgr/ev_posix.c
@@ -54,6 +54,7 @@
 grpc_poll_function_type grpc_poll_function = poll;
 
 static const grpc_event_engine_vtable *g_event_engine;
+static const char* g_poll_strategy_name = NULL;
 
 typedef const grpc_event_engine_vtable *(*event_engine_factory_fn)(void);
 
@@ -101,6 +102,7 @@ static void try_engine(const char *engine) {
   for (size_t i = 0; i < GPR_ARRAY_SIZE(g_factories); i++) {
     if (is(engine, g_factories[i].name)) {
       if ((g_event_engine = g_factories[i].factory())) {
+        g_poll_strategy_name = g_factories[i].name;
         gpr_log(GPR_DEBUG, "Using polling engine: %s", g_factories[i].name);
         return;
       }
@@ -108,6 +110,11 @@ static void try_engine(const char *engine) {
   }
 }
 
+/* Call this only after calling grpc_event_engine_init() */
+const char *grpc_get_poll_strategy_name() {
+  return g_poll_strategy_name;
+}
+
 void grpc_event_engine_init(void) {
   char *s = gpr_getenv("GRPC_POLL_STRATEGY");
   if (s == NULL) {
diff --git a/src/core/lib/iomgr/ev_posix.h b/src/core/lib/iomgr/ev_posix.h
index 344bf63438a..3ed5a5f9562 100644
--- a/src/core/lib/iomgr/ev_posix.h
+++ b/src/core/lib/iomgr/ev_posix.h
@@ -98,6 +98,9 @@ typedef struct grpc_event_engine_vtable {
 void grpc_event_engine_init(void);
 void grpc_event_engine_shutdown(void);
 
+/* Return the name of the poll strategy */
+const char* grpc_get_poll_strategy_name();
+
 /* Create a wrapped file descriptor.
    Requires fd is a non-blocking file descriptor.
    This takes ownership of closing fd. */
diff --git a/test/core/iomgr/ev_epoll_linux_test.c b/test/core/iomgr/ev_epoll_linux_test.c
new file mode 100644
index 00000000000..51da15faa7a
--- /dev/null
+++ b/test/core/iomgr/ev_epoll_linux_test.c
@@ -0,0 +1,222 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/ev_epoll_linux.h"
+#include "src/core/lib/iomgr/ev_posix.h"
+
+#include <poll.h>
+#include <string.h>
+#include <sys/eventfd.h>
+#include <unistd.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+
+#include "src/core/lib/iomgr/iomgr.h"
+#include "test/core/util/test_config.h"
+
+typedef struct test_pollset {
+  grpc_pollset *pollset;
+  gpr_mu *mu;
+} test_pollset;
+
+typedef struct test_fd {
+  int inner_fd;
+  grpc_fd *fd;
+} test_fd;
+
+static void test_fd_init(test_fd *fds, int num_fds) {
+  int i;
+  for (i = 0; i < num_fds; i++) {
+    fds[i].inner_fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
+    fds[i].fd = grpc_fd_create(fds[i].inner_fd, "test_fd");
+  }
+}
+
+static void test_fd_cleanup(grpc_exec_ctx *exec_ctx, test_fd *fds,
+                            int num_fds) {
+  int release_fd;
+  int i;
+
+  for (i = 0; i < num_fds; i++) {
+    grpc_fd_shutdown(exec_ctx, fds[i].fd);
+    grpc_exec_ctx_flush(exec_ctx);
+
+    grpc_fd_orphan(exec_ctx, fds[i].fd, NULL, &release_fd, "test_fd_cleanup");
+    grpc_exec_ctx_flush(exec_ctx);
+
+    GPR_ASSERT(release_fd == fds[i].inner_fd);
+    close(fds[i].inner_fd);
+  }
+}
+
+static void test_pollset_init(test_pollset *pollsets, int num_pollsets) {
+  int i;
+  for (i = 0; i < num_pollsets; i++) {
+    pollsets[i].pollset = gpr_malloc(grpc_pollset_size());
+    grpc_pollset_init(pollsets[i].pollset, &pollsets[i].mu);
+  }
+}
+
+static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, bool success) {
+  grpc_pollset_destroy(p);
+}
+
+static void test_pollset_cleanup(grpc_exec_ctx *exec_ctx,
+                                 test_pollset *pollsets, int num_pollsets) {
+  grpc_closure destroyed;
+  int i;
+
+  for (i = 0; i < num_pollsets; i++) {
+    grpc_closure_init(&destroyed, destroy_pollset, pollsets[i].pollset);
+    grpc_pollset_shutdown(exec_ctx, pollsets[i].pollset, &destroyed);
+
+    grpc_exec_ctx_flush(exec_ctx);
+    gpr_free(pollsets[i].pollset);
+  }
+}
+
+#define NUM_FDS 8
+#define NUM_POLLSETS 4
+/*
+ * Cases to test:
+ *  case 1) Polling islands of both fd and pollset are NULL
+ *  case 2) Polling island of fd is NULL but that of pollset is not-NULL
+ *  case 3) Polling island of fd is not-NULL but that of pollset is NULL
+ *  case 4) Polling islands of both fd and pollset are not-NULL and:
+ *     case 4.1) Polling islands of fd and pollset are equal
+ *     case 4.2) Polling islands of fd and pollset are NOT-equal (This results
+ *     in a merge)
+ * */
+static void test_add_fd_to_pollset() {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  test_fd fds[NUM_FDS];
+  test_pollset pollsets[NUM_POLLSETS];
+  void *expected_pi = NULL;
+  int i;
+
+  test_fd_init(fds, NUM_FDS);
+  test_pollset_init(pollsets, NUM_POLLSETS);
+
+  /*Step 1.
+   * Create three polling islands (This will exercise test case 1 and 2) with
+   * the following configuration:
+   *   polling island 0 = { fds:0,1,2, pollsets:0}
+   *   polling island 1 = { fds:3,4,   pollsets:1}
+   *   polling island 2 = { fds:5,6,7  pollsets:2}
+   *
+   *Step 2.
+   * Add pollset 3 to polling island 0 (by adding fds 0 and 1 to pollset 3)
+   * (This will exercise test cases 3 and 4.1). The configuration becomes:
+   *   polling island 0 = { fds:0,1,2, pollsets:0,3} <<< pollset 3 added here
+   *   polling island 1 = { fds:3,4,   pollsets:1}
+   *   polling island 2 = { fds:5,6,7  pollsets:2}
+   *
+   *Step 3.
+   * Merge polling islands 0 and 1 by adding fd 0 to pollset 1 (This will
+   * exercise test case 4.2). The configuration becomes:
+   *   polling island (merged) = {fds: 0,1,2,3,4, pollsets: 0,1,3}
+   *   polling island 2 = {fds: 5,6,7 pollsets: 2}
+   *
+   *Step 4.
+   * Finally do one more merge by adding fd 3 to pollset 2.
+   *   polling island (merged) = {fds: 0,1,2,3,4,5,6,7, pollsets: 0,1,2,3}
+   */
+
+  /* == Step 1 == */
+  for (i = 0; i <= 2; i++) {
+    grpc_pollset_add_fd(&exec_ctx, pollsets[0].pollset, fds[i].fd);
+    grpc_exec_ctx_flush(&exec_ctx);
+  }
+
+  for (i = 3; i <= 4; i++) {
+    grpc_pollset_add_fd(&exec_ctx, pollsets[1].pollset, fds[i].fd);
+    grpc_exec_ctx_flush(&exec_ctx);
+  }
+
+  for (i = 5; i <= 7; i++) {
+    grpc_pollset_add_fd(&exec_ctx, pollsets[2].pollset, fds[i].fd);
+    grpc_exec_ctx_flush(&exec_ctx);
+  }
+
+  /* == Step 2 == */
+  for (i = 0; i <= 1; i++) {
+    grpc_pollset_add_fd(&exec_ctx, pollsets[3].pollset, fds[i].fd);
+    grpc_exec_ctx_flush(&exec_ctx);
+  }
+
+  /* == Step 3 == */
+  grpc_pollset_add_fd(&exec_ctx, pollsets[1].pollset, fds[0].fd);
+  grpc_exec_ctx_flush(&exec_ctx);
+
+  /* == Step 4 == */
+  grpc_pollset_add_fd(&exec_ctx, pollsets[2].pollset, fds[3].fd);
+  grpc_exec_ctx_flush(&exec_ctx);
+
+  /* All polling islands are merged at this point */
+
+  /* Compare Fd:0's polling island with that of all other Fds */
+  expected_pi = grpc_fd_get_polling_island(fds[0].fd);
+  for (i = 1; i < NUM_FDS; i++) {
+    GPR_ASSERT(grpc_are_polling_islands_equal(
+        expected_pi, grpc_fd_get_polling_island(fds[i].fd)));
+  }
+
+  /* Compare Fd:0's polling island with that of all other pollsets */
+  for (i = 0; i < NUM_POLLSETS; i++) {
+    GPR_ASSERT(grpc_are_polling_islands_equal(
+        expected_pi, grpc_pollset_get_polling_island(pollsets[i].pollset)));
+  }
+
+  test_fd_cleanup(&exec_ctx, fds, NUM_FDS);
+  test_pollset_cleanup(&exec_ctx, pollsets, NUM_POLLSETS);
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+int main(int argc, char **argv) {
+  const char *poll_strategy = NULL;
+  grpc_test_init(argc, argv);
+  grpc_iomgr_init();
+
+  poll_strategy = grpc_get_poll_strategy_name();
+  if (poll_strategy != NULL && strcmp(poll_strategy, "epoll") == 0) {
+    test_add_fd_to_pollset();
+  } else {
+    gpr_log(GPR_INFO,
+            "Skipping the test. The test is only relevant for 'epoll' "
+            "strategy. and the current strategy is: '%s'",
+            poll_strategy);
+  }
+  grpc_iomgr_shutdown();
+  return 0;
+}
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index e8ff61dc3fb..e9df72e43a1 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -315,6 +315,22 @@
     "third_party": false, 
     "type": "target"
   }, 
+  {
+    "deps": [
+      "gpr", 
+      "gpr_test_util", 
+      "grpc", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "language": "c", 
+    "name": "ev_epoll_linux_test", 
+    "src": [
+      "test/core/iomgr/ev_epoll_linux_test.c"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
   {
     "deps": [
       "gpr", 
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index 5a84a41b638..ba661840dad 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -377,6 +377,21 @@
       "windows"
     ]
   }, 
+  {
+    "args": [], 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "gtest": false, 
+    "language": "c", 
+    "name": "ev_epoll_linux_test", 
+    "platforms": [
+      "linux"
+    ]
+  }, 
   {
     "args": [], 
     "ci_platforms": [

From 94cda1a9c6ae86ab176d357b8822332d70283cde Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Fri, 17 Jun 2016 13:28:38 -0700
Subject: [PATCH 120/280] Significantly refactor the polling island locking and
 refcounting code

---
 src/core/lib/iomgr/ev_epoll_linux.c | 462 ++++++++++++++++------------
 1 file changed, 270 insertions(+), 192 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index ed2c494b783..72288889c02 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -140,18 +140,40 @@ static void fd_global_shutdown(void);
 #define CLOSURE_READY ((grpc_closure *)1)
 
 /*******************************************************************************
- * Polling-island Declarations
+ * Polling island Declarations
  */
-/* TODO: sree: Consider making ref_cnt and merged_to to gpr_atm - This would
- * significantly reduce the number of mutex acquisition calls. */
+
+// #define GRPC_PI_REF_COUNT_DEBUG
+#ifdef GRPC_PI_REF_COUNT_DEBUG
+
+#define PI_ADD_REF(p, r) pi_add_ref_dbg((p), 1, (r), __FILE__, __LINE__)
+#define PI_UNREF(p, r) pi_unref_dbg((p), 1, (r), __FILE__, __LINE__)
+
+#else /* defined(GRPC_PI_REF_COUNT_DEBUG) */
+
+#define PI_ADD_REF(p, r) pi_add_ref((p), 1)
+#define PI_UNREF(p, r) pi_unref((p), 1)
+
+#endif /* !defined(GPRC_PI_REF_COUNT_DEBUG) */
+
 typedef struct polling_island {
   gpr_mu mu;
-  int ref_cnt;
-
-  /* Points to the polling_island this merged into.
-   * If merged_to is not NULL, all the remaining fields (except mu and ref_cnt)
-   * are invalid and must be ignored */
-  struct polling_island *merged_to;
+  /* Ref count. Use PI_ADD_REF() and PI_UNREF() macros to increment/decrement
+     the refcount.
+     Once the ref count becomes zero, this structure is destroyed which means
+     we should ensure that there is never a scenario where a PI_ADD_REF() is
+     racing with a PI_UNREF() that just made the ref_count zero. */
+  gpr_atm ref_count;
+
+  /* Pointer to the polling_island this merged into.
+   * merged_to value is only set once in polling_island's lifetime (and that too
+   * only if the island is merged with another island). Because of this, we can
+   * use gpr_atm type here so that we can do atomic access on this and reduce
+   * lock contention on 'mu' mutex.
+   *
+   * Note that if this field is not NULL (i.e not 0), all the remaining fields
+   * (except mu and ref_count) are invalid and must be ignored. */
+  gpr_atm merged_to;
 
   /* The fd of the underlying epoll set */
   int epoll_fd;
@@ -236,6 +258,8 @@ static grpc_wakeup_fd polling_island_wakeup_fd;
 static gpr_mu g_pi_freelist_mu;
 static polling_island *g_pi_freelist = NULL;
 
+static void polling_island_delete(); /* Forward declaration */
+
 #ifdef GRPC_TSAN
 /* Currently TSAN may incorrectly flag data races between epoll_ctl and
    epoll_wait for any grpc_fd structs that are added to the epoll set via
@@ -247,6 +271,51 @@ static polling_island *g_pi_freelist = NULL;
 gpr_atm g_epoll_sync;
 #endif /* defined(GRPC_TSAN) */
 
+#ifdef GRPC_PI_REF_COUNT_DEBUG
+long pi_add_ref(polling_island *pi, int ref_cnt);
+long pi_unref(polling_island *pi, int ref_cnt);
+
+void pi_add_ref_dbg(polling_island *pi, int ref_cnt, char *reason, char *file,
+                    int line) {
+  long old_cnt = pi_add_ref(pi, ref_cnt);
+  gpr_log(GPR_DEBUG, "Add ref pi: %p, old:%ld -> new:%ld (%s) - (%s, %d)",
+          (void *)pi, old_cnt, (old_cnt + ref_cnt), reason, file, line);
+}
+
+void pi_unref_dbg(polling_island *pi, int ref_cnt, char *reason, char *file,
+                  int line) {
+  long old_cnt = pi_unref(pi, ref_cnt);
+  gpr_log(GPR_DEBUG, "Unref pi: %p, old:%ld -> new:%ld (%s) - (%s, %d)",
+          (void *)pi, old_cnt, (old_cnt - ref_cnt), reason, file, line);
+}
+#endif
+
+long pi_add_ref(polling_island *pi, int ref_cnt) {
+  return gpr_atm_no_barrier_fetch_add(&pi->ref_count, ref_cnt);
+}
+
+long pi_unref(polling_island *pi, int ref_cnt) {
+  long old_cnt = gpr_atm_no_barrier_fetch_add(&pi->ref_count, -ref_cnt);
+
+  /* If ref count went to zero, delete the polling island. Note that this need
+     not be done under a lock. Once the ref count goes to zero, we are
+     guaranteed that no one else holds a reference to the polling island (and
+     that there is no racing pi_add_ref() call either.
+
+     Also, if we are deleting the polling island and the merged_to field is
+     non-empty, we should remove a ref to the merged_to polling island
+   */
+  if (old_cnt == ref_cnt) {
+    polling_island *next = (polling_island *)gpr_atm_acq_load(&pi->merged_to);
+    polling_island_delete(pi);
+    if (next != NULL) {
+      PI_UNREF(next, "pi_delete"); /* Recursive call */
+    }
+  }
+
+  return old_cnt;
+}
+
 /* The caller is expected to hold pi->mu lock before calling this function */
 static void polling_island_add_fds_locked(polling_island *pi, grpc_fd **fds,
                                           size_t fd_count, bool add_fd_refs) {
@@ -355,8 +424,7 @@ static void polling_island_remove_fd_locked(polling_island *pi, grpc_fd *fd,
   }
 }
 
-static polling_island *polling_island_create(grpc_fd *initial_fd,
-                                             int initial_ref_cnt) {
+static polling_island *polling_island_create(grpc_fd *initial_fd) {
   polling_island *pi = NULL;
 
   /* Try to get one from the polling island freelist */
@@ -377,6 +445,9 @@ static polling_island *polling_island_create(grpc_fd *initial_fd,
     pi->fds = NULL;
   }
 
+  gpr_atm_no_barrier_store(&pi->ref_count, 0);
+  gpr_atm_no_barrier_store(&pi->merged_to, NULL);
+
   pi->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
 
   if (pi->epoll_fd < 0) {
@@ -387,14 +458,12 @@ static polling_island *polling_island_create(grpc_fd *initial_fd,
 
   polling_island_add_wakeup_fd_locked(pi, &grpc_global_wakeup_fd);
 
-  pi->ref_cnt = initial_ref_cnt;
-  pi->merged_to = NULL;
   pi->next_free = NULL;
 
   if (initial_fd != NULL) {
-    /* It is not really needed to get the pi->mu lock here. If this is a newly
-       created polling island (or one that we got from the freelist), no one
-       else would be holding a lock to it anyway */
+    /* Lock the polling island here just in case we got this structure from the
+       freelist and the polling island lock was not released yet (by the code
+       that adds the polling island to the freelist) */
     gpr_mu_lock(&pi->mu);
     polling_island_add_fds_locked(pi, &initial_fd, 1, true);
     gpr_mu_unlock(&pi->mu);
@@ -404,140 +473,136 @@ static polling_island *polling_island_create(grpc_fd *initial_fd,
 }
 
 static void polling_island_delete(polling_island *pi) {
-  GPR_ASSERT(pi->ref_cnt == 0);
   GPR_ASSERT(pi->fd_cnt == 0);
 
+  gpr_atm_rel_store(&pi->merged_to, NULL);
+
   close(pi->epoll_fd);
   pi->epoll_fd = -1;
 
-  pi->merged_to = NULL;
-
   gpr_mu_lock(&g_pi_freelist_mu);
   pi->next_free = g_pi_freelist;
   g_pi_freelist = pi;
   gpr_mu_unlock(&g_pi_freelist_mu);
 }
 
-void polling_island_unref_and_unlock(polling_island *pi, int unref_by) {
-  pi->ref_cnt -= unref_by;
-  int ref_cnt = pi->ref_cnt;
-  GPR_ASSERT(ref_cnt >= 0);
-
-  gpr_mu_unlock(&pi->mu);
-
-  if (ref_cnt == 0) {
-    polling_island_delete(pi);
-  }
-}
-
-polling_island *polling_island_update_and_lock(polling_island *pi, int unref_by,
-                                               int add_ref_by) {
+/* Gets the lock on the *latest* polling island i.e the last polling island in
+   the linked list (linked by 'merged_to' link). Call gpr_mu_unlock on the
+   returned polling island's mu.
+   Usage: To lock/unlock polling island "pi", do the following:
+      polling_island *pi_latest = polling_island_lock(pi);
+      ...
+      ... critical section ..
+      ...
+      gpr_mu_unlock(&pi_latest->mu); //NOTE: use pi_latest->mu. NOT pi->mu */
+polling_island *polling_island_lock(polling_island *pi) {
   polling_island *next = NULL;
-  gpr_mu_lock(&pi->mu);
-  while (pi->merged_to != NULL) {
-    next = pi->merged_to;
-    polling_island_unref_and_unlock(pi, unref_by);
+  while (true) {
+    next = (polling_island *)gpr_atm_acq_load(&pi->merged_to);
+    if (next == NULL) {
+      /* pi is the last node in the linked list. Get the lock and check again
+         (under the pi->mu lock) that pi is still the last node (because a merge
+         may have happend after the (next == NULL) check above and before
+         getting the pi->mu lock.
+         If pi is the last node, we are done. If not, unlock and continue
+         traversing the list */
+      gpr_mu_lock(&pi->mu);
+      next = (polling_island *)gpr_atm_acq_load(&pi->merged_to);
+      if (next == NULL) {
+        break;
+      }
+      gpr_mu_unlock(&pi->mu);
+    }
+
     pi = next;
-    gpr_mu_lock(&pi->mu);
   }
 
-  pi->ref_cnt += add_ref_by;
   return pi;
 }
 
-void polling_island_pair_update_and_lock(polling_island **p,
-                                         polling_island **q) {
+/* Gets the lock on the *latest* polling islands pointed by *p and *q.
+   This function is needed because calling the following block of code to obtain
+   locks on polling islands (*p and *q) is prone to deadlocks.
+     {
+       polling_island_lock(*p);
+       polling_island_lock(*q);
+     }
+
+   Usage/exmaple:
+     polling_island *p1;
+     polling_island *p2;
+     ..
+     polling_island_lock_pair(&p1, &p2);
+     ..
+     .. Critical section with both p1 and p2 locked
+     ..
+     // Release locks
+     // **IMPORTANT**: Make sure you check p1 == p2 AFTER the function
+     // polling_island_lock_pair() was called and if so, release the lock only
+     // once. Note: Even if p1 != p2 beforec calling polling_island_lock_pair(),
+     // they might be after the function returns:
+     if (p1 == p2) {
+       gpr_mu_unlock(&p1->mu)
+     } else {
+       gpr_mu_unlock(&p1->mu);
+       gpr_mu_unlock(&p2->mu);
+     }
+
+*/
+void polling_island_lock_pair(polling_island **p, polling_island **q) {
   polling_island *pi_1 = *p;
   polling_island *pi_2 = *q;
-  polling_island *temp = NULL;
-  bool pi_1_locked = false;
-  bool pi_2_locked = false;
-  int num_swaps = 0;
-
-  /* Loop until either pi_1 == pi_2 or until we acquired locks on both pi_1
-     and pi_2 */
-  while (pi_1 != pi_2 && !(pi_1_locked && pi_2_locked)) {
-    /* The following assertions are true at this point:
-       - pi_1 != pi_2  (else, the while loop would have exited)
-       - pi_1 MAY be locked
-       - pi_2 is NOT locked */
-
-    /* To maintain lock order consistency, always lock polling_island node with
-       lower address first.
-       First, make sure pi_1 < pi_2 before proceeding any further. If it turns
-       out that pi_1 > pi_2, unlock pi_1 if locked (because pi_2 is not locked
-       at this point and having pi_1 locked would violate the lock order) and
-       swap pi_1 and pi_2 so that pi_1 becomes less than pi_2 */
-    if (pi_1 > pi_2) {
-      if (pi_1_locked) {
-        gpr_mu_unlock(&pi_1->mu);
-        pi_1_locked = false;
-      }
+  polling_island *next_1 = NULL;
+  polling_island *next_2 = NULL;
+
+  /* The algorithm is simple:
+      - Go to the last polling islands in the linked lists *pi_1 and *pi_2 (and
+        keep updating pi_1 and pi_2)
+      - Then obtain locks on the islands by following a lock order rule of
+        locking polling_island with lower address first
+           Special case: Before obtaining the locks, check if pi_1 and pi_2 are
+           pointing to the same island. If that is the case, we can just call
+           polling_island_lock()
+      - After obtaining both the locks, double check that the polling islands
+        are still the last polling islands in their respective linked lists
+        (this is because there might have been polling island merges before
+        we got the lock)
+      - If the polling islands are the last islands, we are done. If not,
+        release the locks and continue the process from the first step */
+  while (true) {
+    next_1 = (polling_island *)gpr_atm_acq_load(&pi_1->merged_to);
+    while (next_1 != NULL) {
+      pi_1 = next_1;
+      next_1 = (polling_island *)gpr_atm_acq_load(&pi_1->merged_to);
+    }
 
-      GPR_SWAP(polling_island *, pi_1, pi_2);
-      num_swaps++;
+    next_2 = (polling_island *)gpr_atm_acq_load(&pi_2->merged_to);
+    while (next_2 != NULL) {
+      pi_2 = next_2;
+      next_2 = (polling_island *)gpr_atm_acq_load(&pi_2->merged_to);
     }
 
-    /* The following assertions are true at this point:
-       - pi_1 != pi_2
-       - pi_1 < pi_2  (address of pi_1 is less than that of pi_2)
-       - pi_1 MAYBE locked
-       - pi_2 is NOT locked */
+    if (pi_1 == pi_2) {
+      pi_1 = pi_2 = polling_island_lock(pi_1);
+      break;
+    }
 
-    /* Lock pi_1 (if pi_1 is pointing to the terminal node in the list) */
-    if (!pi_1_locked) {
+    if (pi_1 < pi_2) {
+      gpr_mu_lock(&pi_1->mu);
+      gpr_mu_lock(&pi_2->mu);
+    } else {
+      gpr_mu_lock(&pi_2->mu);
       gpr_mu_lock(&pi_1->mu);
-      pi_1_locked = true;
-
-      /* If pi_1 is not terminal node (i.e pi_1->merged_to != NULL), we are not
-         done locking this polling_island yet. Release the lock on this node and
-         advance pi_1 to the next node in the list; and go to the beginning of
-         the loop (we can't proceed to locking pi_2 unless we locked pi_1 first)
-         */
-      if (pi_1->merged_to != NULL) {
-        temp = pi_1->merged_to;
-        polling_island_unref_and_unlock(pi_1, 1);
-        pi_1 = temp;
-        pi_1_locked = false;
-
-        continue;
-      }
     }
 
-    /* The following assertions are true at this point:
-       - pi_1 is locked
-       - pi_2 is unlocked
-       - pi_1 != pi_2 */
-
-    gpr_mu_lock(&pi_2->mu);
-    pi_2_locked = true;
-
-    /* If pi_2 is not terminal node, we are not done locking this polling_island
-       yet. Release the lock and update pi_2 to the next node in the list */
-    if (pi_2->merged_to != NULL) {
-      temp = pi_2->merged_to;
-      polling_island_unref_and_unlock(pi_2, 1);
-      pi_2 = temp;
-      pi_2_locked = false;
+    next_1 = (polling_island *)gpr_atm_acq_load(&pi_1->merged_to);
+    next_2 = (polling_island *)gpr_atm_acq_load(&pi_2->merged_to);
+    if (next_1 == NULL && next_2 == NULL) {
+      break;
     }
-  }
 
-  /* At this point, either pi_1 == pi_2 AND/OR we got both locks */
-  if (pi_1 == pi_2) {
-    /* We may or may not have gotten the lock. If we didn't, walk the rest of
-      the polling_island list and get the lock */
-    GPR_ASSERT(pi_1_locked || (!pi_1_locked && !pi_2_locked));
-    if (!pi_1_locked) {
-      pi_1 = pi_2 = polling_island_update_and_lock(pi_1, 2, 0);
-    }
-  } else {
-    GPR_ASSERT(pi_1_locked && pi_2_locked);
-    /* If we swapped pi_1 and pi_2 odd number of times, do one more swap so that
-       pi_1 and pi_2 point to the same polling_island lists they started off
-       with at the beginning of this function (i.e *p and *q respectively) */
-    if (num_swaps % 2 > 0) {
-      GPR_SWAP(polling_island *, pi_1, pi_2);
-    }
+    gpr_mu_unlock(&pi_1->mu);
+    gpr_mu_unlock(&pi_2->mu);
   }
 
   *p = pi_1;
@@ -546,7 +611,7 @@ void polling_island_pair_update_and_lock(polling_island **p,
 
 polling_island *polling_island_merge(polling_island *p, polling_island *q) {
   /* Get locks on both the polling islands */
-  polling_island_pair_update_and_lock(&p, &q);
+  polling_island_lock_pair(&p, &q);
 
   if (p == q) {
     /* Nothing needs to be done here */
@@ -568,15 +633,14 @@ polling_island *polling_island_merge(polling_island *p, polling_island *q) {
   /* Wakeup all the pollers (if any) on p so that they can pickup this change */
   polling_island_add_wakeup_fd_locked(p, &polling_island_wakeup_fd);
 
-  p->merged_to = q;
+  /* Add the 'merged_to' link from p --> q */
+  gpr_atm_rel_store(&p->merged_to, q);
+  PI_ADD_REF(q, "pi_merge"); /* To account for the new incoming ref from p */
 
-  /* - The merged polling island (i.e q) inherits all the ref counts of the
-       island merging with it (i.e p)
-     - The island p will lose a ref count */
-  q->ref_cnt += p->ref_cnt;
-  polling_island_unref_and_unlock(p, 1); /* Decrement refcount */
-  polling_island_unref_and_unlock(q, 0); /* Just Unlock. Don't decrement ref */
+  gpr_mu_unlock(&p->mu);
+  gpr_mu_unlock(&q->mu);
 
+  /* Return the merged polling island */
   return q;
 }
 
@@ -667,6 +731,7 @@ static void unref_by(grpc_fd *fd, int n) {
     fd->freelist_next = fd_freelist;
     fd_freelist = fd;
     grpc_iomgr_unregister_object(&fd->iomgr_object);
+
     gpr_mu_unlock(&fd_freelist_mu);
   } else {
     GPR_ASSERT(old > n);
@@ -785,16 +850,20 @@ static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
   REF_BY(fd, 1, reason);
 
   /* Remove the fd from the polling island:
-     - Update the fd->polling_island to point to the latest polling island
-     - Remove the fd from the polling island.
-     - Remove a ref to the polling island and set fd->polling_island to NULL */
+     - Get a lock on the latest polling island (i.e the last island in the
+       linked list pointed by fd->polling_island). This is the island that
+       would actually contain the fd
+     - Remove the fd from the latest polling island
+     - Unlock the latest polling island
+     - Set fd->polling_island to NULL (but remove the ref on the polling island
+       before doing this.) */
   gpr_mu_lock(&fd->pi_mu);
   if (fd->polling_island != NULL) {
-    fd->polling_island =
-        polling_island_update_and_lock(fd->polling_island, 1, 0);
-    polling_island_remove_fd_locked(fd->polling_island, fd, is_fd_closed);
+    polling_island *pi_latest = polling_island_lock(fd->polling_island);
+    polling_island_remove_fd_locked(pi_latest, fd, is_fd_closed);
+    gpr_mu_unlock(&pi_latest->mu);
 
-    polling_island_unref_and_unlock(fd->polling_island, 1);
+    PI_UNREF(fd->polling_island, "fd_orphan");
     fd->polling_island = NULL;
   }
   gpr_mu_unlock(&fd->pi_mu);
@@ -1050,17 +1119,13 @@ static void fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
   gpr_mu_unlock(&fd->mu);
 }
 
-/* Release the reference to pollset->polling_island and set it to NULL.
-   pollset->mu must be held */
-static void pollset_release_polling_island_locked(grpc_pollset *pollset) {
-  gpr_mu_lock(&pollset->pi_mu);
-  if (pollset->polling_island) {
-    pollset->polling_island =
-        polling_island_update_and_lock(pollset->polling_island, 1, 0);
-    polling_island_unref_and_unlock(pollset->polling_island, 1);
-    pollset->polling_island = NULL;
+static void pollset_release_polling_island(grpc_pollset *ps, char *reason) {
+  gpr_mu_lock(&ps->pi_mu);
+  if (ps->polling_island != NULL) {
+    PI_UNREF(ps->polling_island, reason);
   }
-  gpr_mu_unlock(&pollset->pi_mu);
+  ps->polling_island = NULL;
+  gpr_mu_unlock(&ps->pi_mu);
 }
 
 static void finish_shutdown_locked(grpc_exec_ctx *exec_ctx,
@@ -1069,8 +1134,9 @@ static void finish_shutdown_locked(grpc_exec_ctx *exec_ctx,
   GPR_ASSERT(!pollset_has_workers(pollset));
 
   pollset->finish_shutdown_called = true;
-  pollset_release_polling_island_locked(pollset);
 
+  /* Release the ref and set pollset->polling_island to NULL */
+  pollset_release_polling_island(pollset, "ps_shutdown");
   grpc_exec_ctx_enqueue(exec_ctx, pollset->shutdown_done, true, NULL);
 }
 
@@ -1110,7 +1176,7 @@ static void pollset_reset(grpc_pollset *pollset) {
   pollset->finish_shutdown_called = false;
   pollset->kicked_without_pollers = false;
   pollset->shutdown_done = NULL;
-  pollset_release_polling_island_locked(pollset);
+  pollset_release_polling_island(pollset, "ps_reset");
 }
 
 #define GRPC_EPOLL_MAX_EVENTS 1000
@@ -1124,28 +1190,37 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
   GPR_TIMER_BEGIN("pollset_work_and_unlock", 0);
 
   /* We need to get the epoll_fd to wait on. The epoll_fd is in inside the
-     polling island pointed by pollset->polling_island.
+     latest polling island pointed by pollset->polling_island.
      Acquire the following locks:
      - pollset->mu (which we already have)
      - pollset->pi_mu
-     - pollset->polling_island->mu (call polling_island_update_and_lock())*/
+     - pollset->polling_island lock  */
   gpr_mu_lock(&pollset->pi_mu);
 
-  pi = pollset->polling_island;
-  if (pi == NULL) {
-    pi = polling_island_create(NULL, 1);
+  if (pollset->polling_island == NULL) {
+    pollset->polling_island = polling_island_create(NULL);
+    PI_ADD_REF(pollset->polling_island, "ps");
   }
 
-  /* In addition to locking the polling island, add a ref so that the island
-     does not get destroyed (which means the epoll_fd won't be closed) while
-     we are are doing an epoll_wait() on the epoll_fd */
-  pi = polling_island_update_and_lock(pi, 1, 1);
+  pi = polling_island_lock(pollset->polling_island);
   epoll_fd = pi->epoll_fd;
 
-  /* Update the pollset->polling_island */
-  pollset->polling_island = pi;
+  /* Update the pollset->polling_island since the island being pointed by
+     pollset->polling_island may not be the latest (i.e pi) */
+  if (pollset->polling_island != pi) {
+    /* Always do PI_ADD_REF before PI_UNREF because PI_UNREF may cause the
+       polling island to be deleted */
+    PI_ADD_REF(pi, "ps");
+    PI_UNREF(pollset->polling_island, "ps");
+    pollset->polling_island = pi;
+  }
+
+  /* Add an extra ref so that the island does not get destroyed (which means
+     the epoll_fd won't be closed) while we are are doing an epoll_wait() on the
+     epoll_fd */
+  PI_ADD_REF(pi, "ps_work");
 
-  polling_island_unref_and_unlock(pollset->polling_island, 0); /* Keep the ref*/
+  gpr_mu_unlock(&pi->mu);
   gpr_mu_unlock(&pollset->pi_mu);
   gpr_mu_unlock(&pollset->mu);
 
@@ -1193,14 +1268,12 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
 
   GPR_ASSERT(pi != NULL);
 
-  /* Before leaving, release the extra ref we added to the polling island */
-  /* It is important to note that at this point 'pi' may not be the same as
-   * pollset->polling_island. This is because pollset->polling_island pointer
-   * gets updated whenever the underlying polling island is merged with another
-   * island and while we are doing epoll_wait() above, the polling island may
-   * have been merged */
-  pi = polling_island_update_and_lock(pi, 1, 0); /* No new ref added */
-  polling_island_unref_and_unlock(pi, 1);
+  /* Before leaving, release the extra ref we added to the polling island. It
+     is important to use "pi" here (i.e our old copy of pollset->polling_island
+     that we got before releasing the polling island lock). This is because
+     pollset->polling_island pointer might get udpated in other parts of the
+     code when there is an island merge while we are doing epoll_wait() above */
+  PI_UNREF(pi, "ps_work");
 
   GPR_TIMER_END("pollset_work_and_unlock", 0);
 }
@@ -1297,20 +1370,34 @@ static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   if (fd->polling_island == pollset->polling_island) {
     pi_new = fd->polling_island;
     if (pi_new == NULL) {
-      pi_new = polling_island_create(fd, 2);
+      pi_new = polling_island_create(fd);
     }
   } else if (fd->polling_island == NULL) {
-    pi_new = polling_island_update_and_lock(pollset->polling_island, 1, 1);
-    polling_island_add_fds_locked(pollset->polling_island, &fd, 1, true);
+    pi_new = polling_island_lock(pollset->polling_island);
+    polling_island_add_fds_locked(pi_new, &fd, 1, true);
     gpr_mu_unlock(&pi_new->mu);
   } else if (pollset->polling_island == NULL) {
-    pi_new = polling_island_update_and_lock(fd->polling_island, 1, 1);
+    pi_new = polling_island_lock(fd->polling_island);
     gpr_mu_unlock(&pi_new->mu);
   } else {
     pi_new = polling_island_merge(fd->polling_island, pollset->polling_island);
   }
 
-  fd->polling_island = pollset->polling_island = pi_new;
+  if (fd->polling_island != pi_new) {
+    PI_ADD_REF(pi_new, "fd");
+    if (fd->polling_island != NULL) {
+      PI_UNREF(fd->polling_island, "fd");
+    }
+    fd->polling_island = pi_new;
+  }
+
+  if (pollset->polling_island != pi_new) {
+    PI_ADD_REF(pi_new, "ps");
+    if (pollset->polling_island != NULL) {
+      PI_UNREF(pollset->polling_island, "ps");
+    }
+    pollset->polling_island = pi_new;
+  }
 
   gpr_mu_unlock(&fd->pi_mu);
   gpr_mu_unlock(&pollset->pi_mu);
@@ -1481,28 +1568,19 @@ void *grpc_pollset_get_polling_island(grpc_pollset *ps) {
   return pi;
 }
 
-static polling_island *get_polling_island(polling_island *p) {
-  if (p == NULL) {
-    return NULL;
-  }
+bool grpc_are_polling_islands_equal(void *p, void *q) {
+  polling_island *p1 = p;
+  polling_island *p2 = q;
 
-  polling_island *next;
-  gpr_mu_lock(&p->mu);
-  while (p->merged_to != NULL) {
-    next = p->merged_to;
-    gpr_mu_unlock(&p->mu);
-    p = next;
-    gpr_mu_lock(&p->mu);
+  polling_island_lock_pair(&p1, &p2);
+  if (p1 == p2) {
+    gpr_mu_unlock(&p1->mu);
+  } else {
+    gpr_mu_unlock(&p1->mu);
+    gpr_mu_unlock(&p2->mu);
   }
-  gpr_mu_unlock(&p->mu);
-
-  return p;
-}
 
-bool grpc_are_polling_islands_equal(void *p, void *q) {
-  p = get_polling_island(p);
-  q = get_polling_island(q);
-  return p == q;
+  return p1 == p2;
 }
 
 /*******************************************************************************

From 65c6c59bcddd2847eb26eb7518747ebeea839d0b Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Tue, 21 Jun 2016 08:27:07 -0700
Subject: [PATCH 121/280] Fix refcounting tsan failures and grab pollset lock
 in the function pollset_add_fd

---
 src/core/lib/iomgr/ev_epoll_linux.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 72288889c02..7cc69c876db 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -291,11 +291,11 @@ void pi_unref_dbg(polling_island *pi, int ref_cnt, char *reason, char *file,
 #endif
 
 long pi_add_ref(polling_island *pi, int ref_cnt) {
-  return gpr_atm_no_barrier_fetch_add(&pi->ref_count, ref_cnt);
+  return gpr_atm_full_fetch_add(&pi->ref_count, ref_cnt);
 }
 
 long pi_unref(polling_island *pi, int ref_cnt) {
-  long old_cnt = gpr_atm_no_barrier_fetch_add(&pi->ref_count, -ref_cnt);
+  long old_cnt = gpr_atm_full_fetch_add(&pi->ref_count, -ref_cnt);
 
   /* If ref count went to zero, delete the polling island. Note that this need
      not be done under a lock. Once the ref count goes to zero, we are
@@ -311,6 +311,8 @@ long pi_unref(polling_island *pi, int ref_cnt) {
     if (next != NULL) {
       PI_UNREF(next, "pi_delete"); /* Recursive call */
     }
+  } else {
+    GPR_ASSERT(old_cnt > ref_cnt);
   }
 
   return old_cnt;
@@ -445,8 +447,8 @@ static polling_island *polling_island_create(grpc_fd *initial_fd) {
     pi->fds = NULL;
   }
 
-  gpr_atm_no_barrier_store(&pi->ref_count, 0);
-  gpr_atm_no_barrier_store(&pi->merged_to, NULL);
+  gpr_atm_rel_store(&pi->ref_count, 0);
+  gpr_atm_rel_store(&pi->merged_to, NULL);
 
   pi->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
 
@@ -1347,7 +1349,7 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 
 static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                            grpc_fd *fd) {
-  /* TODO sreek - Double check if we need to get a pollset->mu lock here */
+  gpr_mu_lock(&pollset->mu);
   gpr_mu_lock(&pollset->pi_mu);
   gpr_mu_lock(&fd->pi_mu);
 
@@ -1401,6 +1403,7 @@ static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 
   gpr_mu_unlock(&fd->pi_mu);
   gpr_mu_unlock(&pollset->pi_mu);
+  gpr_mu_unlock(&pollset->mu);
 }
 
 /*******************************************************************************

From d263b925e8b8ce36042f34eda34715696b6eef3e Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Tue, 21 Jun 2016 09:15:57 -0700
Subject: [PATCH 122/280] Make sure to poll cq

---
 test/cpp/end2end/server_builder_plugin_test.cc | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/test/cpp/end2end/server_builder_plugin_test.cc b/test/cpp/end2end/server_builder_plugin_test.cc
index 75f23b64a73..7d0b467d816 100644
--- a/test/cpp/end2end/server_builder_plugin_test.cc
+++ b/test/cpp/end2end/server_builder_plugin_test.cc
@@ -37,6 +37,7 @@
 #include <grpc++/impl/server_builder_option.h>
 #include <grpc++/impl/server_builder_plugin.h>
 #include <grpc++/impl/server_initializer.h>
+#include <grpc++/impl/thd.h>
 #include <grpc++/security/credentials.h>
 #include <grpc++/security/server_credentials.h>
 #include <grpc++/server.h>
@@ -188,6 +189,7 @@ class ServerBuilderPluginTest : public ::testing::TestWithParam<bool> {
     grpc::string server_address = "localhost:" + to_string(port_);
     builder_->AddListeningPort(server_address, InsecureServerCredentials());
     cq_ = builder_->AddCompletionQueue();
+    cq_thread_ = grpc::thread(std::bind(&ServerBuilderPluginTest::RunCQ, this));
     server_ = builder_->BuildAndStart();
     EXPECT_TRUE(CheckPresent());
   }
@@ -204,11 +206,8 @@ class ServerBuilderPluginTest : public ::testing::TestWithParam<bool> {
     EXPECT_TRUE(plugin->init_server_is_called());
     EXPECT_TRUE(plugin->finish_is_called());
     server_->Shutdown();
-    void* tag;
-    bool ok;
     cq_->Shutdown();
-    while (cq_->Next(&tag, &ok))
-      ;
+    cq_thread_.join();
   }
 
   string to_string(const int number) {
@@ -223,6 +222,7 @@ class ServerBuilderPluginTest : public ::testing::TestWithParam<bool> {
   std::unique_ptr<grpc::testing::EchoTestService::Stub> stub_;
   std::unique_ptr<ServerCompletionQueue> cq_;
   std::unique_ptr<Server> server_;
+  grpc::thread cq_thread_;
   TestServiceImpl service_;
   int port_;
 
@@ -238,6 +238,13 @@ class ServerBuilderPluginTest : public ::testing::TestWithParam<bool> {
       return nullptr;
     }
   }
+
+  void RunCQ() {
+    void* tag;
+    bool ok;
+    while (cq_->Next(&tag, &ok))
+      ;
+  }
 };
 
 TEST_P(ServerBuilderPluginTest, PluginWithoutServiceTest) {

From 04a468122f0072cbd8a67d66dfd8243ce3ddface Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Tue, 21 Jun 2016 09:16:57 -0700
Subject: [PATCH 123/280] Add comment

---
 test/cpp/end2end/server_builder_plugin_test.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/test/cpp/end2end/server_builder_plugin_test.cc b/test/cpp/end2end/server_builder_plugin_test.cc
index 7d0b467d816..778a2be573e 100644
--- a/test/cpp/end2end/server_builder_plugin_test.cc
+++ b/test/cpp/end2end/server_builder_plugin_test.cc
@@ -188,6 +188,8 @@ class ServerBuilderPluginTest : public ::testing::TestWithParam<bool> {
   void StartServer() {
     grpc::string server_address = "localhost:" + to_string(port_);
     builder_->AddListeningPort(server_address, InsecureServerCredentials());
+    // we run some tests without a service, and for those we need to supply a
+    // frequently polled completion queue
     cq_ = builder_->AddCompletionQueue();
     cq_thread_ = grpc::thread(std::bind(&ServerBuilderPluginTest::RunCQ, this));
     server_ = builder_->BuildAndStart();

From 939e9ca6d82f2558702e5fa859d16ca7052f746b Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Tue, 21 Jun 2016 08:00:42 -0700
Subject: [PATCH 124/280] use template to generate project.json files

---
 .../csharp/Grpc.Auth/project.json.template    | 34 ++++++++++++++
 .../Grpc.Core.Tests/project.json.template     | 24 ++++++++++
 .../csharp/Grpc.Core/project.json.template    | 44 ++++++++++++++++++
 .../project.json.template                     | 21 +++++++++
 .../project.json.template                     | 21 +++++++++
 .../Grpc.Examples.Tests/project.json.template | 23 ++++++++++
 .../Grpc.Examples/project.json.template       | 27 +++++++++++
 .../project.json.template                     | 23 ++++++++++
 .../Grpc.HealthCheck/project.json.template    | 37 +++++++++++++++
 .../project.json.template                     | 22 +++++++++
 .../project.json.template                     | 22 +++++++++
 .../project.json.template                     | 22 +++++++++
 .../project.json.template                     | 22 +++++++++
 .../project.json.template                     | 38 ++++++++++++++++
 templates/src/csharp/build_options.include    | 45 +++++++++++++++++++
 15 files changed, 425 insertions(+)
 create mode 100644 templates/src/csharp/Grpc.Auth/project.json.template
 create mode 100644 templates/src/csharp/Grpc.Core.Tests/project.json.template
 create mode 100644 templates/src/csharp/Grpc.Core/project.json.template
 create mode 100644 templates/src/csharp/Grpc.Examples.MathClient/project.json.template
 create mode 100644 templates/src/csharp/Grpc.Examples.MathServer/project.json.template
 create mode 100644 templates/src/csharp/Grpc.Examples.Tests/project.json.template
 create mode 100644 templates/src/csharp/Grpc.Examples/project.json.template
 create mode 100644 templates/src/csharp/Grpc.HealthCheck.Tests/project.json.template
 create mode 100644 templates/src/csharp/Grpc.HealthCheck/project.json.template
 create mode 100644 templates/src/csharp/Grpc.IntegrationTesting.Client/project.json.template
 create mode 100644 templates/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json.template
 create mode 100644 templates/src/csharp/Grpc.IntegrationTesting.Server/project.json.template
 create mode 100644 templates/src/csharp/Grpc.IntegrationTesting.StressClient/project.json.template
 create mode 100644 templates/src/csharp/Grpc.IntegrationTesting/project.json.template
 create mode 100644 templates/src/csharp/build_options.include

diff --git a/templates/src/csharp/Grpc.Auth/project.json.template b/templates/src/csharp/Grpc.Auth/project.json.template
new file mode 100644
index 00000000000..90ad0eb0891
--- /dev/null
+++ b/templates/src/csharp/Grpc.Auth/project.json.template
@@ -0,0 +1,34 @@
+%YAML 1.2
+--- |
+  {
+    "version": "${settings.csharp_version}",
+    "title": "gRPC C# Auth",
+    "authors": [ "Google Inc." ],
+    "copyright": "Copyright 2015, Google Inc.",
+    "packOptions": {
+      "summary": "Auth library for C# implementation of gRPC - an RPC library and framework",
+      "description": "Auth library for C# implementation of gRPC - an RPC library and framework. See project site for more info.",
+      "owners": [ "grpc-packages" ],
+      "licenseUrl": "https://github.com/grpc/grpc/blob/master/LICENSE",
+      "projectUrl": "https://github.com/grpc/grpc",
+      "requireLicenseAcceptance": false,
+      "tags": [ "gRPC RPC Protocol HTTP/2 Auth OAuth2" ],
+    },
+    "dependencies": {
+      "Grpc.Core": "${settings.csharp_version}",
+      "Google.Apis.Auth": "1.11.1"
+    },
+    "frameworks": {
+      "net45": { },
+      "netstandard1.5": {
+        "imports": [
+          "net45"
+        ],
+        "dependencies": {
+          "Microsoft.NETCore.Portable.Compatibility": "1.0.1-rc2-24027",
+          "NETStandard.Library": "1.5.0-rc2-24027",
+          "System.Threading.Tasks": "4.0.11-rc2-24027"
+        }
+      }
+    }
+  }
diff --git a/templates/src/csharp/Grpc.Core.Tests/project.json.template b/templates/src/csharp/Grpc.Core.Tests/project.json.template
new file mode 100644
index 00000000000..bc9fa3e63a9
--- /dev/null
+++ b/templates/src/csharp/Grpc.Core.Tests/project.json.template
@@ -0,0 +1,24 @@
+%YAML 1.2
+--- |
+  {
+    <%include file="../build_options.include" args="executable=True"/>
+    "dependencies": {
+      "Grpc.Core": {
+        "target": "project"
+      },
+      "Newtonsoft.Json": "8.0.3",
+      "NUnit": "3.2.0",
+      "NUnitLite": "3.2.0-*"
+    },
+    "frameworks": {
+      "net45": { },
+      "netstandard1.5": {
+        "imports": [
+          "portable-net45"
+        ],
+        "dependencies": {
+          "NETStandard.Library": "1.5.0-rc2-24027"
+        }
+      }
+    },
+  }
diff --git a/templates/src/csharp/Grpc.Core/project.json.template b/templates/src/csharp/Grpc.Core/project.json.template
new file mode 100644
index 00000000000..6f9197f572f
--- /dev/null
+++ b/templates/src/csharp/Grpc.Core/project.json.template
@@ -0,0 +1,44 @@
+%YAML 1.2
+--- |
+  {
+    "version": "${settings.csharp_version}",
+    "title": "gRPC C# Core",
+    "authors": [ "Google Inc." ],
+    "copyright": "Copyright 2015, Google Inc.",
+    "packOptions": {
+      "summary": "Core C# implementation of gRPC - an RPC library and framework",
+      "description": "Core C# implementation of gRPC - an RPC library and framework. See project site for more info.",
+      "owners": [ "grpc-packages" ],
+      "licenseUrl": "https://github.com/grpc/grpc/blob/master/LICENSE",
+      "projectUrl": "https://github.com/grpc/grpc",
+      "requireLicenseAcceptance": false,
+      "tags": [ "gRPC RPC Protocol HTTP/2" ],
+      "files": {
+        "build/net45/": "Grpc.Core.targets",
+        "build/native/bin/windows_x86/": "../nativelibs/windows_x86/grpc_csharp_ext.dll",
+        "build/native/bin/windows_x64/": "../nativelibs/windows_x64/grpc_csharp_ext.dll",
+        "build/native/bin/linux_x86/": "../nativelibs/linux_x86/libgrpc_csharp_ext.so",
+        "build/native/bin/linux_x64/": "../nativelibs/linux_x64/libgrpc_csharp_ext.so",
+        "build/native/bin/macosx_x86/": "../nativelibs/macosx_x86/libgrpc_csharp_ext.dylib",
+        "build/native/bin/macosx_x64/": "../nativelibs/macosx_x64/libgrpc_csharp_ext.dylib"
+      }
+    },
+    "buildOptions": {
+      "embed": [ "../../../etc/roots.pem" ]
+    },
+    "dependencies": {
+      "Ix-Async": "1.2.5"
+    },
+    "frameworks": {
+      "net45": { },
+      "netstandard1.5": {
+        "imports": [
+          "portable-net45"
+        ],
+        "dependencies": {
+          "NETStandard.Library": "1.5.0-rc2-24027",
+          "System.Threading.Thread": "4.0.0-rc2-24027"
+        }
+      }
+    }
+  }
diff --git a/templates/src/csharp/Grpc.Examples.MathClient/project.json.template b/templates/src/csharp/Grpc.Examples.MathClient/project.json.template
new file mode 100644
index 00000000000..fba401c3a47
--- /dev/null
+++ b/templates/src/csharp/Grpc.Examples.MathClient/project.json.template
@@ -0,0 +1,21 @@
+%YAML 1.2
+--- |
+  {
+    <%include file="../build_options.include" args="executable=True"/>
+    "dependencies": {
+      "Grpc.Examples": {
+        "target": "project"
+      }
+    },
+    "frameworks": {
+      "net45": { },
+      "netstandard1.5": {
+        "imports": [
+          "portable-net45"
+        ],
+        "dependencies": {
+          "NETStandard.Library": "1.5.0-rc2-24027"
+        }
+      }
+    }
+  }
diff --git a/templates/src/csharp/Grpc.Examples.MathServer/project.json.template b/templates/src/csharp/Grpc.Examples.MathServer/project.json.template
new file mode 100644
index 00000000000..fba401c3a47
--- /dev/null
+++ b/templates/src/csharp/Grpc.Examples.MathServer/project.json.template
@@ -0,0 +1,21 @@
+%YAML 1.2
+--- |
+  {
+    <%include file="../build_options.include" args="executable=True"/>
+    "dependencies": {
+      "Grpc.Examples": {
+        "target": "project"
+      }
+    },
+    "frameworks": {
+      "net45": { },
+      "netstandard1.5": {
+        "imports": [
+          "portable-net45"
+        ],
+        "dependencies": {
+          "NETStandard.Library": "1.5.0-rc2-24027"
+        }
+      }
+    }
+  }
diff --git a/templates/src/csharp/Grpc.Examples.Tests/project.json.template b/templates/src/csharp/Grpc.Examples.Tests/project.json.template
new file mode 100644
index 00000000000..21765f0565c
--- /dev/null
+++ b/templates/src/csharp/Grpc.Examples.Tests/project.json.template
@@ -0,0 +1,23 @@
+%YAML 1.2
+--- |
+  {
+    <%include file="../build_options.include" args="executable=True"/>
+    "dependencies": {
+      "Grpc.Examples": {
+        "target": "project"
+      },
+      "NUnit": "3.2.0",
+      "NUnitLite": "3.2.0-*"
+    },
+    "frameworks": {
+      "net45": { },
+      "netstandard1.5": {
+        "imports": [
+          "portable-net45"
+        ],
+        "dependencies": {
+          "NETStandard.Library": "1.5.0-rc2-24027"
+        }
+      }
+    }
+  }
diff --git a/templates/src/csharp/Grpc.Examples/project.json.template b/templates/src/csharp/Grpc.Examples/project.json.template
new file mode 100644
index 00000000000..715fc087256
--- /dev/null
+++ b/templates/src/csharp/Grpc.Examples/project.json.template
@@ -0,0 +1,27 @@
+%YAML 1.2
+--- |
+  {
+    <%include file="../build_options.include" args="executable=False"/>
+    "dependencies": {
+      "Grpc.Core": {
+        "target": "project"
+      },
+      "Google.Protobuf": "3.0.0-beta3"
+    },
+    "frameworks": {
+      "net45": {
+        "frameworkAssemblies": {
+          "System.Runtime": "",
+          "System.IO": ""
+        }
+      },
+      "netstandard1.5": {
+        "imports": [
+          "portable-net45"
+        ],
+        "dependencies": {
+          "NETStandard.Library": "1.5.0-rc2-24027"
+        }
+      }
+    }
+  }
diff --git a/templates/src/csharp/Grpc.HealthCheck.Tests/project.json.template b/templates/src/csharp/Grpc.HealthCheck.Tests/project.json.template
new file mode 100644
index 00000000000..79e67226cb4
--- /dev/null
+++ b/templates/src/csharp/Grpc.HealthCheck.Tests/project.json.template
@@ -0,0 +1,23 @@
+%YAML 1.2
+--- |
+  {
+    <%include file="../build_options.include" args="executable=True"/>
+    "dependencies": {
+      "Grpc.HealthCheck": {
+        "target": "project"
+      },
+      "NUnit": "3.2.0",
+      "NUnitLite": "3.2.0-*"
+    },
+    "frameworks": {
+      "net45": { },
+      "netstandard1.5": {
+        "imports": [
+          "portable-net45"
+        ],
+        "dependencies": {
+          "NETStandard.Library": "1.5.0-rc2-24027"
+        }
+      }
+    }
+  }
diff --git a/templates/src/csharp/Grpc.HealthCheck/project.json.template b/templates/src/csharp/Grpc.HealthCheck/project.json.template
new file mode 100644
index 00000000000..59073af7eec
--- /dev/null
+++ b/templates/src/csharp/Grpc.HealthCheck/project.json.template
@@ -0,0 +1,37 @@
+%YAML 1.2
+--- |
+  {
+    "version": "${settings.csharp_version}",
+    "title": "gRPC C# Healthchecking",
+    "authors": [ "Google Inc." ],
+    "copyright": "Copyright 2015, Google Inc.",
+    "packOptions": {
+      "summary": "Implementation of gRPC health service",
+      "description": "Example implementation of grpc.health.v1 service that can be used for health-checking.",
+      "owners": [ "grpc-packages" ],
+      "licenseUrl": "https://github.com/grpc/grpc/blob/master/LICENSE",
+      "projectUrl": "https://github.com/grpc/grpc",
+      "requireLicenseAcceptance": false,
+      "tags": [ "gRPC health check" ]
+    },
+    "dependencies": {
+      "Grpc.Core": "${settings.csharp_version}",
+      "Google.Protobuf": "3.0.0-beta3"
+    },
+    "frameworks": {
+      "net45": {
+        "frameworkAssemblies": {
+          "System.Runtime": "",
+          "System.IO": ""
+        }
+      },
+      "netstandard1.5": {
+        "imports": [
+          "portable-net45"
+        ],
+        "dependencies": {
+          "NETStandard.Library": "1.5.0-rc2-24027"
+        }
+      }
+    }
+  }
diff --git a/templates/src/csharp/Grpc.IntegrationTesting.Client/project.json.template b/templates/src/csharp/Grpc.IntegrationTesting.Client/project.json.template
new file mode 100644
index 00000000000..10ed5493477
--- /dev/null
+++ b/templates/src/csharp/Grpc.IntegrationTesting.Client/project.json.template
@@ -0,0 +1,22 @@
+%YAML 1.2
+--- |
+  {
+    <%include file="../build_options.include" args="executable=True,includeData=True"/>
+    "dependencies": {
+      "Grpc.IntegrationTesting": {
+        "target": "project"
+      }
+    },
+    "frameworks": {
+      "net45": { },
+      "netstandard1.5": {
+        "imports": [
+          "portable-net45",
+          "net45"
+        ],
+        "dependencies": {
+          "NETStandard.Library": "1.5.0-rc2-24027"
+        }
+      }
+    }
+  }
diff --git a/templates/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json.template b/templates/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json.template
new file mode 100644
index 00000000000..10ed5493477
--- /dev/null
+++ b/templates/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json.template
@@ -0,0 +1,22 @@
+%YAML 1.2
+--- |
+  {
+    <%include file="../build_options.include" args="executable=True,includeData=True"/>
+    "dependencies": {
+      "Grpc.IntegrationTesting": {
+        "target": "project"
+      }
+    },
+    "frameworks": {
+      "net45": { },
+      "netstandard1.5": {
+        "imports": [
+          "portable-net45",
+          "net45"
+        ],
+        "dependencies": {
+          "NETStandard.Library": "1.5.0-rc2-24027"
+        }
+      }
+    }
+  }
diff --git a/templates/src/csharp/Grpc.IntegrationTesting.Server/project.json.template b/templates/src/csharp/Grpc.IntegrationTesting.Server/project.json.template
new file mode 100644
index 00000000000..10ed5493477
--- /dev/null
+++ b/templates/src/csharp/Grpc.IntegrationTesting.Server/project.json.template
@@ -0,0 +1,22 @@
+%YAML 1.2
+--- |
+  {
+    <%include file="../build_options.include" args="executable=True,includeData=True"/>
+    "dependencies": {
+      "Grpc.IntegrationTesting": {
+        "target": "project"
+      }
+    },
+    "frameworks": {
+      "net45": { },
+      "netstandard1.5": {
+        "imports": [
+          "portable-net45",
+          "net45"
+        ],
+        "dependencies": {
+          "NETStandard.Library": "1.5.0-rc2-24027"
+        }
+      }
+    }
+  }
diff --git a/templates/src/csharp/Grpc.IntegrationTesting.StressClient/project.json.template b/templates/src/csharp/Grpc.IntegrationTesting.StressClient/project.json.template
new file mode 100644
index 00000000000..10ed5493477
--- /dev/null
+++ b/templates/src/csharp/Grpc.IntegrationTesting.StressClient/project.json.template
@@ -0,0 +1,22 @@
+%YAML 1.2
+--- |
+  {
+    <%include file="../build_options.include" args="executable=True,includeData=True"/>
+    "dependencies": {
+      "Grpc.IntegrationTesting": {
+        "target": "project"
+      }
+    },
+    "frameworks": {
+      "net45": { },
+      "netstandard1.5": {
+        "imports": [
+          "portable-net45",
+          "net45"
+        ],
+        "dependencies": {
+          "NETStandard.Library": "1.5.0-rc2-24027"
+        }
+      }
+    }
+  }
diff --git a/templates/src/csharp/Grpc.IntegrationTesting/project.json.template b/templates/src/csharp/Grpc.IntegrationTesting/project.json.template
new file mode 100644
index 00000000000..31815114857
--- /dev/null
+++ b/templates/src/csharp/Grpc.IntegrationTesting/project.json.template
@@ -0,0 +1,38 @@
+%YAML 1.2
+--- |
+  {
+    <%include file="../build_options.include" args="executable=True,includeData=True"/>
+    "dependencies": {
+      "Grpc.Auth": {
+        "target": "project"
+      },
+      "Grpc.Core": {
+        "target": "project"
+      },
+      "Google.Protobuf": "3.0.0-beta3",
+      "CommandLineParser": "1.9.71",
+      "NUnit": "3.2.0",
+      "NUnitLite": "3.2.0-*"
+    },
+    "frameworks": {
+      "net45": {
+        "dependencies": {
+          "Moq": "4.2.1510.2205"
+        },
+        "frameworkAssemblies": {
+          "System.Runtime": "",
+          "System.IO": ""
+        }
+      },
+      "netstandard1.5": {
+        "imports": [
+          "portable-net45",
+          "net45"
+        ],
+        "dependencies": {
+          "NETStandard.Library": "1.5.0-rc2-24027",
+          "System.Linq.Expressions": "4.0.11-rc2-24027"
+        }
+      }
+    }
+  }
diff --git a/templates/src/csharp/build_options.include b/templates/src/csharp/build_options.include
new file mode 100644
index 00000000000..468d281618c
--- /dev/null
+++ b/templates/src/csharp/build_options.include
@@ -0,0 +1,45 @@
+<%page args="executable=False,includeData=False"/>\
+"buildOptions": {
+  % if executable:
+    "emitEntryPoint": true
+  % endif
+  },
+  % if executable:
+  "configurations": {
+    "Debug": {
+      "buildOptions": {
+        "copyToOutput": {
+          % if includeData:
+          "include": "data/*",
+          % endif
+          "mappings": {
+            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
+            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
+            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
+          }
+        }
+      }
+    },
+    "Release": {
+      "buildOptions": {
+        "copyToOutput": {
+          % if includeData:
+          "include": "data/*",
+          % endif
+          "mappings": {
+            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
+            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
+            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/opt/libgrpc_csharp_ext.so",
+            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
+          }
+        }
+      }
+    }
+  },
+  "runtimes": {
+    "win7-x64": { },
+    "debian.8-x64": { },
+    "osx.10.11-x64": { }
+  },
+  % endif
\ No newline at end of file

From 381e26a21eb0d23f55653da1f611ace55ee8b662 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Tue, 21 Jun 2016 08:37:22 -0700
Subject: [PATCH 125/280] regenerate project.json files

---
 src/csharp/Grpc.Auth/project.json             |  4 +-
 src/csharp/Grpc.Core.Tests/project.json       | 40 +++++++++++++----
 src/csharp/Grpc.Core/project.json             |  2 +-
 .../Grpc.Examples.MathClient/project.json     | 40 +++++++++++++----
 .../Grpc.Examples.MathServer/project.json     | 40 +++++++++++++----
 src/csharp/Grpc.Examples.Tests/project.json   | 40 +++++++++++++----
 src/csharp/Grpc.Examples/project.json         |  3 ++
 .../Grpc.HealthCheck.Tests/project.json       | 40 +++++++++++++----
 src/csharp/Grpc.HealthCheck/project.json      |  4 +-
 .../project.json                              | 42 +++++++++++++----
 .../project.json                              | 42 +++++++++++++----
 .../project.json                              | 42 +++++++++++++----
 .../project.json                              | 42 +++++++++++++----
 .../Grpc.IntegrationTesting/project.json      | 45 ++++++++++++++-----
 14 files changed, 329 insertions(+), 97 deletions(-)

diff --git a/src/csharp/Grpc.Auth/project.json b/src/csharp/Grpc.Auth/project.json
index 57539f2976b..1677565824b 100644
--- a/src/csharp/Grpc.Auth/project.json
+++ b/src/csharp/Grpc.Auth/project.json
@@ -1,5 +1,5 @@
 {
-  "version": "0.14.0-anexperiment",
+  "version": "0.15.0-dev",
   "title": "gRPC C# Auth",
   "authors": [ "Google Inc." ],
   "copyright": "Copyright 2015, Google Inc.",
@@ -13,7 +13,7 @@
     "tags": [ "gRPC RPC Protocol HTTP/2 Auth OAuth2" ],
   },
   "dependencies": {
-    "Grpc.Core": "0.14.0-anexperiment",
+    "Grpc.Core": "0.15.0-dev",
     "Google.Apis.Auth": "1.11.1"
   },
   "frameworks": {
diff --git a/src/csharp/Grpc.Core.Tests/project.json b/src/csharp/Grpc.Core.Tests/project.json
index 95f40fdbbde..3ad081df39e 100644
--- a/src/csharp/Grpc.Core.Tests/project.json
+++ b/src/csharp/Grpc.Core.Tests/project.json
@@ -1,13 +1,39 @@
 {
   "buildOptions": {
-    "copyToOutput": {
-      "mappings": {
-        "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
-        "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll"
+    "emitEntryPoint": true
+  },
+  "configurations": {
+    "Debug": {
+      "buildOptions": {
+        "copyToOutput": {
+          "mappings": {
+            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
+            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
+            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
+          }
+        }
       }
     },
-    "emitEntryPoint": true
+    "Release": {
+      "buildOptions": {
+        "copyToOutput": {
+          "mappings": {
+            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
+            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
+            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/opt/libgrpc_csharp_ext.so",
+            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
+          }
+        }
+      }
+    }
   },
+  "runtimes": {
+    "win7-x64": { },
+    "debian.8-x64": { },
+    "osx.10.11-x64": { }
+  },
+
   "dependencies": {
     "Grpc.Core": {
       "target": "project"
@@ -27,8 +53,4 @@
       }
     }
   },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": {}
-  }
 }
diff --git a/src/csharp/Grpc.Core/project.json b/src/csharp/Grpc.Core/project.json
index ba3dc15495d..7253107e04a 100644
--- a/src/csharp/Grpc.Core/project.json
+++ b/src/csharp/Grpc.Core/project.json
@@ -1,5 +1,5 @@
 {
-  "version": "0.14.0-anexperiment",
+  "version": "0.15.0-dev",
   "title": "gRPC C# Core",
   "authors": [ "Google Inc." ],
   "copyright": "Copyright 2015, Google Inc.",
diff --git a/src/csharp/Grpc.Examples.MathClient/project.json b/src/csharp/Grpc.Examples.MathClient/project.json
index 4c1ea780412..b254f15af87 100644
--- a/src/csharp/Grpc.Examples.MathClient/project.json
+++ b/src/csharp/Grpc.Examples.MathClient/project.json
@@ -1,13 +1,39 @@
 {
   "buildOptions": {
-    "copyToOutput": {
-      "mappings": {
-        "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
-        "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll"
+    "emitEntryPoint": true
+  },
+  "configurations": {
+    "Debug": {
+      "buildOptions": {
+        "copyToOutput": {
+          "mappings": {
+            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
+            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
+            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
+          }
+        }
       }
     },
-    "emitEntryPoint": true
+    "Release": {
+      "buildOptions": {
+        "copyToOutput": {
+          "mappings": {
+            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
+            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
+            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/opt/libgrpc_csharp_ext.so",
+            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
+          }
+        }
+      }
+    }
   },
+  "runtimes": {
+    "win7-x64": { },
+    "debian.8-x64": { },
+    "osx.10.11-x64": { }
+  },
+
   "dependencies": {
     "Grpc.Examples": {
       "target": "project"
@@ -23,9 +49,5 @@
         "NETStandard.Library": "1.5.0-rc2-24027"
       }
     }
-  },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": {}
   }
 }
diff --git a/src/csharp/Grpc.Examples.MathServer/project.json b/src/csharp/Grpc.Examples.MathServer/project.json
index 4c1ea780412..b254f15af87 100644
--- a/src/csharp/Grpc.Examples.MathServer/project.json
+++ b/src/csharp/Grpc.Examples.MathServer/project.json
@@ -1,13 +1,39 @@
 {
   "buildOptions": {
-    "copyToOutput": {
-      "mappings": {
-        "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
-        "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll"
+    "emitEntryPoint": true
+  },
+  "configurations": {
+    "Debug": {
+      "buildOptions": {
+        "copyToOutput": {
+          "mappings": {
+            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
+            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
+            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
+          }
+        }
       }
     },
-    "emitEntryPoint": true
+    "Release": {
+      "buildOptions": {
+        "copyToOutput": {
+          "mappings": {
+            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
+            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
+            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/opt/libgrpc_csharp_ext.so",
+            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
+          }
+        }
+      }
+    }
   },
+  "runtimes": {
+    "win7-x64": { },
+    "debian.8-x64": { },
+    "osx.10.11-x64": { }
+  },
+
   "dependencies": {
     "Grpc.Examples": {
       "target": "project"
@@ -23,9 +49,5 @@
         "NETStandard.Library": "1.5.0-rc2-24027"
       }
     }
-  },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": {}
   }
 }
diff --git a/src/csharp/Grpc.Examples.Tests/project.json b/src/csharp/Grpc.Examples.Tests/project.json
index f41be82bd53..d2779e814f9 100644
--- a/src/csharp/Grpc.Examples.Tests/project.json
+++ b/src/csharp/Grpc.Examples.Tests/project.json
@@ -1,13 +1,39 @@
 {
   "buildOptions": {
-    "copyToOutput": {
-      "mappings": {
-        "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
-        "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll"
+    "emitEntryPoint": true
+  },
+  "configurations": {
+    "Debug": {
+      "buildOptions": {
+        "copyToOutput": {
+          "mappings": {
+            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
+            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
+            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
+          }
+        }
       }
     },
-    "emitEntryPoint": true
+    "Release": {
+      "buildOptions": {
+        "copyToOutput": {
+          "mappings": {
+            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
+            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
+            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/opt/libgrpc_csharp_ext.so",
+            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
+          }
+        }
+      }
+    }
   },
+  "runtimes": {
+    "win7-x64": { },
+    "debian.8-x64": { },
+    "osx.10.11-x64": { }
+  },
+
   "dependencies": {
     "Grpc.Examples": {
       "target": "project"
@@ -25,9 +51,5 @@
         "NETStandard.Library": "1.5.0-rc2-24027"
       }
     }
-  },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": {}
   }
 }
diff --git a/src/csharp/Grpc.Examples/project.json b/src/csharp/Grpc.Examples/project.json
index fe580eb165b..7d3f4dcbb1e 100644
--- a/src/csharp/Grpc.Examples/project.json
+++ b/src/csharp/Grpc.Examples/project.json
@@ -1,4 +1,7 @@
 {
+  "buildOptions": {
+  },
+
   "dependencies": {
     "Grpc.Core": {
       "target": "project"
diff --git a/src/csharp/Grpc.HealthCheck.Tests/project.json b/src/csharp/Grpc.HealthCheck.Tests/project.json
index 5a5f063258a..74599bd4b9e 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/project.json
+++ b/src/csharp/Grpc.HealthCheck.Tests/project.json
@@ -1,13 +1,39 @@
 {
   "buildOptions": {
-    "copyToOutput": {
-      "mappings": {
-        "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
-        "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll"
+    "emitEntryPoint": true
+  },
+  "configurations": {
+    "Debug": {
+      "buildOptions": {
+        "copyToOutput": {
+          "mappings": {
+            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
+            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
+            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
+          }
+        }
       }
     },
-    "emitEntryPoint": true
+    "Release": {
+      "buildOptions": {
+        "copyToOutput": {
+          "mappings": {
+            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
+            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
+            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/opt/libgrpc_csharp_ext.so",
+            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
+          }
+        }
+      }
+    }
   },
+  "runtimes": {
+    "win7-x64": { },
+    "debian.8-x64": { },
+    "osx.10.11-x64": { }
+  },
+
   "dependencies": {
     "Grpc.HealthCheck": {
       "target": "project"
@@ -25,9 +51,5 @@
         "NETStandard.Library": "1.5.0-rc2-24027"
       }
     }
-  },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": {}
   }
 }
diff --git a/src/csharp/Grpc.HealthCheck/project.json b/src/csharp/Grpc.HealthCheck/project.json
index e9fdfad4731..eb57608957a 100644
--- a/src/csharp/Grpc.HealthCheck/project.json
+++ b/src/csharp/Grpc.HealthCheck/project.json
@@ -1,5 +1,5 @@
 {
-  "version": "0.14.0-anexperiment",
+  "version": "0.15.0-dev",
   "title": "gRPC C# Healthchecking",
   "authors": [ "Google Inc." ],
   "copyright": "Copyright 2015, Google Inc.",
@@ -13,7 +13,7 @@
     "tags": [ "gRPC health check" ]
   },
   "dependencies": {
-    "Grpc.Core": "0.14.0-anexperiment",
+    "Grpc.Core": "0.15.0-dev",
     "Google.Protobuf": "3.0.0-beta3"
   },
   "frameworks": {
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/project.json b/src/csharp/Grpc.IntegrationTesting.Client/project.json
index b19b76c6ccf..e5ba04d7173 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Client/project.json
@@ -1,13 +1,41 @@
 {
   "buildOptions": {
-    "copyToOutput": {
-      "mappings": {
-        "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
-        "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll"
+    "emitEntryPoint": true
+  },
+  "configurations": {
+    "Debug": {
+      "buildOptions": {
+        "copyToOutput": {
+          "include": "data/*",
+          "mappings": {
+            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
+            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
+            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
+          }
+        }
       }
     },
-    "emitEntryPoint": true
+    "Release": {
+      "buildOptions": {
+        "copyToOutput": {
+          "include": "data/*",
+          "mappings": {
+            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
+            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
+            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/opt/libgrpc_csharp_ext.so",
+            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
+          }
+        }
+      }
+    }
   },
+  "runtimes": {
+    "win7-x64": { },
+    "debian.8-x64": { },
+    "osx.10.11-x64": { }
+  },
+
   "dependencies": {
     "Grpc.IntegrationTesting": {
       "target": "project"
@@ -24,9 +52,5 @@
         "NETStandard.Library": "1.5.0-rc2-24027"
       }
     }
-  },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": {}
   }
 }
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
index b19b76c6ccf..e5ba04d7173 100644
--- a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
@@ -1,13 +1,41 @@
 {
   "buildOptions": {
-    "copyToOutput": {
-      "mappings": {
-        "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
-        "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll"
+    "emitEntryPoint": true
+  },
+  "configurations": {
+    "Debug": {
+      "buildOptions": {
+        "copyToOutput": {
+          "include": "data/*",
+          "mappings": {
+            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
+            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
+            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
+          }
+        }
       }
     },
-    "emitEntryPoint": true
+    "Release": {
+      "buildOptions": {
+        "copyToOutput": {
+          "include": "data/*",
+          "mappings": {
+            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
+            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
+            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/opt/libgrpc_csharp_ext.so",
+            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
+          }
+        }
+      }
+    }
   },
+  "runtimes": {
+    "win7-x64": { },
+    "debian.8-x64": { },
+    "osx.10.11-x64": { }
+  },
+
   "dependencies": {
     "Grpc.IntegrationTesting": {
       "target": "project"
@@ -24,9 +52,5 @@
         "NETStandard.Library": "1.5.0-rc2-24027"
       }
     }
-  },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": {}
   }
 }
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/project.json b/src/csharp/Grpc.IntegrationTesting.Server/project.json
index b19b76c6ccf..e5ba04d7173 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Server/project.json
@@ -1,13 +1,41 @@
 {
   "buildOptions": {
-    "copyToOutput": {
-      "mappings": {
-        "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
-        "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll"
+    "emitEntryPoint": true
+  },
+  "configurations": {
+    "Debug": {
+      "buildOptions": {
+        "copyToOutput": {
+          "include": "data/*",
+          "mappings": {
+            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
+            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
+            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
+          }
+        }
       }
     },
-    "emitEntryPoint": true
+    "Release": {
+      "buildOptions": {
+        "copyToOutput": {
+          "include": "data/*",
+          "mappings": {
+            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
+            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
+            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/opt/libgrpc_csharp_ext.so",
+            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
+          }
+        }
+      }
+    }
   },
+  "runtimes": {
+    "win7-x64": { },
+    "debian.8-x64": { },
+    "osx.10.11-x64": { }
+  },
+
   "dependencies": {
     "Grpc.IntegrationTesting": {
       "target": "project"
@@ -24,9 +52,5 @@
         "NETStandard.Library": "1.5.0-rc2-24027"
       }
     }
-  },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": {}
   }
 }
diff --git a/src/csharp/Grpc.IntegrationTesting.StressClient/project.json b/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
index b19b76c6ccf..e5ba04d7173 100644
--- a/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
@@ -1,13 +1,41 @@
 {
   "buildOptions": {
-    "copyToOutput": {
-      "mappings": {
-        "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
-        "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll"
+    "emitEntryPoint": true
+  },
+  "configurations": {
+    "Debug": {
+      "buildOptions": {
+        "copyToOutput": {
+          "include": "data/*",
+          "mappings": {
+            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
+            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
+            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
+          }
+        }
       }
     },
-    "emitEntryPoint": true
+    "Release": {
+      "buildOptions": {
+        "copyToOutput": {
+          "include": "data/*",
+          "mappings": {
+            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
+            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
+            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/opt/libgrpc_csharp_ext.so",
+            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
+          }
+        }
+      }
+    }
   },
+  "runtimes": {
+    "win7-x64": { },
+    "debian.8-x64": { },
+    "osx.10.11-x64": { }
+  },
+
   "dependencies": {
     "Grpc.IntegrationTesting": {
       "target": "project"
@@ -24,9 +52,5 @@
         "NETStandard.Library": "1.5.0-rc2-24027"
       }
     }
-  },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": {}
   }
 }
diff --git a/src/csharp/Grpc.IntegrationTesting/project.json b/src/csharp/Grpc.IntegrationTesting/project.json
index be857279892..3493ab0c228 100644
--- a/src/csharp/Grpc.IntegrationTesting/project.json
+++ b/src/csharp/Grpc.IntegrationTesting/project.json
@@ -1,14 +1,41 @@
 {
   "buildOptions": {
-    "copyToOutput": {
-      "mappings": {
-        "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
-        "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll"
-      },
-      "include": "data/*"
-    },
     "emitEntryPoint": true
   },
+  "configurations": {
+    "Debug": {
+      "buildOptions": {
+        "copyToOutput": {
+          "include": "data/*",
+          "mappings": {
+            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
+            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Debug/grpc_csharp_ext.dll",
+            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/dbg/libgrpc_csharp_ext.so",
+            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/dbg/libgrpc_csharp_ext.dylib"
+          }
+        }
+      }
+    },
+    "Release": {
+      "buildOptions": {
+        "copyToOutput": {
+          "include": "data/*",
+          "mappings": {
+            "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
+            "nativelibs/windows_x86/grpc_csharp_ext.dll": "../../../vsprojects/Release/grpc_csharp_ext.dll",
+            "nativelibs/linux_x64/libgrpc_csharp_ext.so": "../../../libs/opt/libgrpc_csharp_ext.so",
+            "nativelibs/macosx_x64/libgrpc_csharp_ext.dylib": "../../../libs/opt/libgrpc_csharp_ext.dylib"
+          }
+        }
+      }
+    }
+  },
+  "runtimes": {
+    "win7-x64": { },
+    "debian.8-x64": { },
+    "osx.10.11-x64": { }
+  },
+
   "dependencies": {
     "Grpc.Auth": {
       "target": "project"
@@ -41,9 +68,5 @@
         "System.Linq.Expressions": "4.0.11-rc2-24027"
       }
     }
-  },
-  "runtimes": {
-    "win7-x64": { },
-    "debian.8-x64": {}
   }
 }

From 6d082203eb23b4abe31e3e80d4ab01bc9bb6f3af Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Tue, 21 Jun 2016 10:03:38 -0700
Subject: [PATCH 126/280] try making C# tests work on coreclr on mac

---
 tools/run_tests/run_tests.py | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index c5cf0135f73..3881c075d46 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -509,10 +509,11 @@ class CSharpLanguage(object):
         self._docker_distro = 'coreclr'
 
       if self.platform == 'mac':
-        # On Mac, official distribution of mono is 32bit.
         # TODO(jtattermusch): EMBED_ZLIB=true currently breaks the mac build
-        self._make_options = ['EMBED_OPENSSL=true',
-                              'CFLAGS=-m32', 'LDFLAGS=-m32']
+        self._make_options = ['EMBED_OPENSSL=true']
+        if self.args.compiler != 'coreclr':
+          # On Mac, official distribution of mono is 32bit.
+          self._make_options += ['CFLAGS=-m32', 'LDFLAGS=-m32']
       else:
         self._make_options = ['EMBED_OPENSSL=true', 'EMBED_ZLIB=true']
 
@@ -529,6 +530,9 @@ class CSharpLanguage(object):
       if self.platform == 'linux':
         assembly_subdir += '/netstandard1.5/debian.8-x64'
         assembly_extension = ''
+      if self.platform == 'mac':
+        assembly_subdir += '/netstandard1.5/osx.10.11-x64'
+        assembly_extension = ''
       else:
         assembly_subdir += '/netstandard1.5/win7-x64'
       runtime_cmd = []

From 9f26a149a5da48364ec62dd607e34104bb851c6d Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Tue, 21 Jun 2016 10:15:01 -0700
Subject: [PATCH 127/280] fixed incomplete sentence

---
 doc/compression.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/doc/compression.md b/doc/compression.md
index 6e455636021..a116ac50a16 100644
--- a/doc/compression.md
+++ b/doc/compression.md
@@ -81,8 +81,8 @@ initial call. A client doesn't a priori (presently) know which algorithms a
 server supports. This issue can be addressed with an initial negotiation of
 capabilities or an automatic retry mechanism. These features will be implemented
 in the future. Currently however, compression levels are only supported at the
-server side, which is aware of the client's capabilities by virtue of the
-incoming.
+server side, which is aware of the client's capabilities through the incoming
+Message-Accept-Encoding header.
 
 ### Propagation to child RPCs
 

From 6e2f88c9fd21a06ad265c494325999c679c53375 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Tue, 21 Jun 2016 10:52:40 -0700
Subject: [PATCH 128/280] compile 64bit extension for coreclr on windows

---
 tools/run_tests/run_tests.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 3881c075d46..d3819c08840 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -501,8 +501,10 @@ class CSharpLanguage(object):
     if self.platform == 'windows':
       # Explicitly choosing between x86 and x64 arch doesn't work yet
       _check_arch(self.args.arch, ['default'])
+      # CoreCLR use 64bit runtime by default.
+      arch_option = 'x64' if self.args.compiler == 'coreclr' else self.args.arch
       self._make_options = [_windows_toolset_option(self.args.compiler),
-                            _windows_arch_option(self.args.arch)]
+                            _windows_arch_option(arch_option)]
     else:
       _check_compiler(self.args.compiler, ['default', 'coreclr'])
       if self.platform == 'linux' and self.args.compiler == 'coreclr':

From d5fd7ddc70e658a0364bd2e43c8a486a25db267c Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Tue, 21 Jun 2016 11:13:23 -0700
Subject: [PATCH 129/280] Addressed review comments

Removed the silencing for incompatible-pointer-types
Removed unused objects
Fixed format issues
---
 src/objective-c/ProtoRPC/ProtoService.m |  9 +++------
 src/objective-c/tests/GRPCClientTests.m | 24 ++++++++++++------------
 src/objective-c/tests/Podfile           |  3 ++-
 3 files changed, 17 insertions(+), 19 deletions(-)

diff --git a/src/objective-c/ProtoRPC/ProtoService.m b/src/objective-c/ProtoRPC/ProtoService.m
index cd9bc7aeac4..97401908519 100644
--- a/src/objective-c/ProtoRPC/ProtoService.m
+++ b/src/objective-c/ProtoRPC/ProtoService.m
@@ -65,22 +65,19 @@
   return self;
 }
 
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wincompatible-pointer-types"
 - (ProtoRPC *)RPCToMethod:(NSString *)method
            requestsWriter:(GRXWriter *)requestsWriter
             responseClass:(Class)responseClass
        responsesWriteable:(id<GRXWriteable>)responsesWriteable {
-  ProtoMethod *methodName = [[ProtoMethod alloc] initWithPackage:_packageName
-                                                         service:_serviceName
-                                                          method:method];
+  GRPCProtoMethod *methodName = [[GRPCProtoMethod alloc] initWithPackage:_packageName
+                                                                 service:_serviceName
+                                                                  method:method];
   return [[ProtoRPC alloc] initWithHost:_host
                                  method:methodName
                          requestsWriter:requestsWriter
                           responseClass:responseClass
                      responsesWriteable:responsesWriteable];
 }
-#pragma clang diagnostic pop
 @end
 
 @implementation GRPCProtoService
diff --git a/src/objective-c/tests/GRPCClientTests.m b/src/objective-c/tests/GRPCClientTests.m
index 2eca7bf5498..1167a715bb9 100644
--- a/src/objective-c/tests/GRPCClientTests.m
+++ b/src/objective-c/tests/GRPCClientTests.m
@@ -110,14 +110,14 @@ static GRPCProtoMethod *kUnaryCallMethod;
 
   // This method isn't implemented by the remote server.
   kInexistentMethod = [[GRPCProtoMethod alloc] initWithPackage:kPackage
-                                                   service:kService
-                                                    method:@"Inexistent"];
+                                                       service:kService
+                                                        method:@"Inexistent"];
   kEmptyCallMethod = [[GRPCProtoMethod alloc] initWithPackage:kPackage
-                                                  service:kService
-                                                   method:@"EmptyCall"];
+                                                      service:kService
+                                                       method:@"EmptyCall"];
   kUnaryCallMethod = [[GRPCProtoMethod alloc] initWithPackage:kPackage
-                                                  service:kService
-                                                   method:@"UnaryCall"];
+                                                      service:kService
+                                                       method:@"UnaryCall"];
 }
 
 - (void)testConnectionToRemoteServer {
@@ -303,9 +303,9 @@ static GRPCProtoMethod *kUnaryCallMethod;
 
   // Try to set parameters to nil for GRPCCall. This should cause an exception
   @try {
-    GRPCCall *call __unused = [[GRPCCall alloc] initWithHost:nil
-                                               path:nil
-                                     requestsWriter:nil];
+    (void)[[GRPCCall alloc] initWithHost:nil
+                                    path:nil
+                          requestsWriter:nil];
     XCTFail(@"Did not receive an exception when parameters are nil");
   } @catch(NSException *theException) {
     NSLog(@"Received exception as expected: %@", theException.name);
@@ -316,9 +316,9 @@ static GRPCProtoMethod *kUnaryCallMethod;
   GRXWriter *requestsWriter = [GRXWriter emptyWriter];
   [requestsWriter finishWithError:nil];
   @try {
-    GRPCCall *call __unused = [[GRPCCall alloc] initWithHost:kHostAddress
-                                               path:kUnaryCallMethod.HTTPPath
-                                     requestsWriter:requestsWriter];
+    (void)[[GRPCCall alloc] initWithHost:kHostAddress
+                                    path:kUnaryCallMethod.HTTPPath
+                          requestsWriter:requestsWriter];
     XCTFail(@"Did not receive an exception when GRXWriter has incorrect state.");
   } @catch(NSException *theException) {
     NSLog(@"Received exception as expected: %@", theException.name);
diff --git a/src/objective-c/tests/Podfile b/src/objective-c/tests/Podfile
index d51b18cc34d..6d5f94cbda1 100644
--- a/src/objective-c/tests/Podfile
+++ b/src/objective-c/tests/Podfile
@@ -6,7 +6,7 @@ install! 'cocoapods', :deterministic_uuids => false
 def shared_pods
   pod 'Protobuf', :path => "../../../third_party/protobuf", :inhibit_warnings => true
   pod 'BoringSSL', :podspec => "..", :inhibit_warnings => true
-  pod 'CronetFramework', :podspec => "..", :inhibit_warnings => true
+  pod 'CronetFramework', :podspec => ".."
   pod 'gRPC', :path => "../../.."
   pod 'RemoteTest', :path => "RemoteTestClient"
 end
@@ -42,6 +42,7 @@ post_install do |installer|
     end
     if target.name == 'gRPC'
       target.build_configurations.each do |config|
+        # TODO(zyc) Remove this setting after the issue is resolved
         # GPR_UNREACHABLE_CODE causes "Control may reach end of non-void
         # function" warning
         config.build_settings['GCC_WARN_ABOUT_RETURN_TYPE'] = 'NO'

From 8d9e83806d24ad5e1a47bb705d88816bfc8b4864 Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Tue, 21 Jun 2016 11:21:48 -0700
Subject: [PATCH 130/280] Fixed format issues

---
 src/objective-c/tests/InteropTests.m | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/objective-c/tests/InteropTests.m b/src/objective-c/tests/InteropTests.m
index 60a83259fa6..15ce120c551 100644
--- a/src/objective-c/tests/InteropTests.m
+++ b/src/objective-c/tests/InteropTests.m
@@ -285,8 +285,8 @@ static cronet_engine *cronetEngine = NULL;
   GRXBufferedPipe *requestsBuffer = [[GRXBufferedPipe alloc] init];
 
   GRPCProtoCall *call = [_service RPCToStreamingInputCallWithRequestsWriter:requestsBuffer
-                                                               handler:^(RMTStreamingInputCallResponse *response,
-                                                                         NSError *error) {
+                                                                    handler:^(RMTStreamingInputCallResponse *response,
+                                                                              NSError *error) {
     XCTAssertEqual(error.code, GRPC_STATUS_CANCELLED);
     [expectation fulfill];
   }];

From 743decdafa3fe9b5e315748e61ff368245ec4b9d Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Tue, 21 Jun 2016 11:40:47 -0700
Subject: [PATCH 131/280] fix C# --use_docker on linux

---
 tools/run_tests/run_tests.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index d3819c08840..2a80706e6a8 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -509,6 +509,8 @@ class CSharpLanguage(object):
       _check_compiler(self.args.compiler, ['default', 'coreclr'])
       if self.platform == 'linux' and self.args.compiler == 'coreclr':
         self._docker_distro = 'coreclr'
+      else:
+        self._docker_distro = 'jessie'
 
       if self.platform == 'mac':
         # TODO(jtattermusch): EMBED_ZLIB=true currently breaks the mac build

From b665dd2722371e5c4a28bbf6cb5f791f8ab5cca9 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Tue, 21 Jun 2016 11:52:29 -0700
Subject: [PATCH 132/280] reworded some

---
 doc/compression.md | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/doc/compression.md b/doc/compression.md
index a116ac50a16..15fae4d29bf 100644
--- a/doc/compression.md
+++ b/doc/compression.md
@@ -42,13 +42,13 @@ and RPC settings (for example, if compression would result in small or negative
 gains).
 
 When a message from a client compressed with an unsupported algorithm is
-processed by a server, it WILL result in an INVALID\_ARGUMENT error. The server
-will include in its response a `grpc-accept-encoding` header specifying the
-algorithms it does accept. If an INTERNAL error is returned from the server
-despite having used one of the algorithms from the `grpc-accept-encoding`
-header, the cause MUST NOT be related to compression. Data sent from a server
-compressed with an algorithm not supported by the client WILL result in an
-INTERNAL error on the client side.
+processed by a server, it WILL result in an INVALID\_ARGUMENT error on the
+server. The server will then include in its response a `grpc-accept-encoding`
+header specifying the algorithms it does accept. If an INTERNAL error is
+returned from the server despite having used one of the algorithms from the
+`grpc-accept-encoding` header, the cause MUST NOT be related to compression.
+Data sent from a server compressed with an algorithm not supported by the client
+WILL result in an INTERNAL error on the client side.
 
 Note that a peer MAY choose to not disclose all the encodings it supports.
 However, if it receives a message compressed in an undisclosed but supported

From 3d399cb102510e46ca252213ad2799b40704d33d Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Tue, 21 Jun 2016 11:57:46 -0700
Subject: [PATCH 133/280] Fix format issues

---
 src/objective-c/tests/InteropTests.m | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/objective-c/tests/InteropTests.m b/src/objective-c/tests/InteropTests.m
index 15ce120c551..3102cf597a0 100644
--- a/src/objective-c/tests/InteropTests.m
+++ b/src/objective-c/tests/InteropTests.m
@@ -284,9 +284,10 @@ static cronet_engine *cronetEngine = NULL;
   // A buffered pipe to which we never write any value acts as a writer that just hangs.
   GRXBufferedPipe *requestsBuffer = [[GRXBufferedPipe alloc] init];
 
-  GRPCProtoCall *call = [_service RPCToStreamingInputCallWithRequestsWriter:requestsBuffer
-                                                                    handler:^(RMTStreamingInputCallResponse *response,
-                                                                              NSError *error) {
+  GRPCProtoCall *call =
+      [_service RPCToStreamingInputCallWithRequestsWriter:requestsBuffer
+                                                  handler:^(RMTStreamingInputCallResponse *response,
+                                                            NSError *error) {
     XCTAssertEqual(error.code, GRPC_STATUS_CANCELLED);
     [expectation fulfill];
   }];

From 7edfcb021f56a1fe0cf1154740cfad7a4be21cc7 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Tue, 21 Jun 2016 12:02:33 -0700
Subject: [PATCH 134/280] Using inlined BoolValue in lieu of wrappers.proto due
 to lack of node support

---
 src/proto/grpc/testing/messages.proto | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/src/proto/grpc/testing/messages.proto b/src/proto/grpc/testing/messages.proto
index e4e748a6913..367752d77bb 100644
--- a/src/proto/grpc/testing/messages.proto
+++ b/src/proto/grpc/testing/messages.proto
@@ -32,7 +32,13 @@
 
 syntax = "proto3";
 
-import "google/protobuf/wrappers.proto";
+// TODO(dgq): Go back to using well-known types once
+// https://github.com/grpc/grpc/issues/6980 has been fixed.
+// import "google/protobuf/wrappers.proto";
+message BoolValue {
+  // The bool value.
+  bool value = 1;
+}
 
 package grpc.testing;
 
@@ -82,13 +88,13 @@ message SimpleRequest {
   // "nullable" in order to interoperate seamlessly with clients not able to
   // implement the full compression tests by introspecting the call to verify
   // the response's compression status.
-  google.protobuf.BoolValue response_compressed = 6;
+  BoolValue response_compressed = 6;
 
   // Whether server should return a given status
   EchoStatus response_status = 7;
 
   // Whether the server should expect this request to be compressed.
-  google.protobuf.BoolValue expect_compressed = 8;
+  BoolValue expect_compressed = 8;
 }
 
 // Unary response, as configured by the request.
@@ -111,7 +117,7 @@ message StreamingInputCallRequest {
   // is "nullable" in order to interoperate seamlessly with servers not able to
   // implement the full compression tests by introspecting the call to verify
   // the request's compression status.
-  google.protobuf.BoolValue expect_compressed = 2;
+  BoolValue expect_compressed = 2;
 
   // Not expecting any payload from the response.
 }
@@ -135,7 +141,7 @@ message ResponseParameters {
   // "nullable" in order to interoperate seamlessly with clients not able to
   // implement the full compression tests by introspecting the call to verify
   // the response's compression status.
-  google.protobuf.BoolValue compressed = 3;
+  BoolValue compressed = 3;
 }
 
 // Server-streaming request.

From ad8723f6473034aacbfd7c0e80c0ad2b93156db8 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Tue, 21 Jun 2016 13:09:29 -0700
Subject: [PATCH 135/280] moved up 'package' statement.

---
 src/proto/grpc/testing/messages.proto | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/proto/grpc/testing/messages.proto b/src/proto/grpc/testing/messages.proto
index 367752d77bb..64998c2f231 100644
--- a/src/proto/grpc/testing/messages.proto
+++ b/src/proto/grpc/testing/messages.proto
@@ -32,6 +32,8 @@
 
 syntax = "proto3";
 
+package grpc.testing;
+
 // TODO(dgq): Go back to using well-known types once
 // https://github.com/grpc/grpc/issues/6980 has been fixed.
 // import "google/protobuf/wrappers.proto";
@@ -40,8 +42,6 @@ message BoolValue {
   bool value = 1;
 }
 
-package grpc.testing;
-
 // DEPRECATED, don't use. To be removed shortly.
 // The type of payload that should be returned.
 enum PayloadType {

From f8bbe72a00ef3827879ea8d377c595c8e96d6a66 Mon Sep 17 00:00:00 2001
From: murgatroid99 <mlumish@google.com>
Date: Tue, 21 Jun 2016 14:05:16 -0700
Subject: [PATCH 136/280] Make src/node/tools/package.json consistent with its
 template

---
 templates/src/node/tools/package.json.template | 1 +
 1 file changed, 1 insertion(+)

diff --git a/templates/src/node/tools/package.json.template b/templates/src/node/tools/package.json.template
index 69ad71a3b83..02824259767 100644
--- a/templates/src/node/tools/package.json.template
+++ b/templates/src/node/tools/package.json.template
@@ -36,6 +36,7 @@
       "index.js",
       "bin/protoc.js",
       "bin/protoc_plugin.js",
+      "bin/google/protobuf",
       "LICENSE"
     ],
     "main": "index.js"

From be3745529715745901245073233bf2fd8f282b00 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Tue, 21 Jun 2016 15:11:33 -0700
Subject: [PATCH 137/280] add missing ConfigureAwait(false)

---
 src/csharp/Grpc.Core/GrpcEnvironment.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/csharp/Grpc.Core/GrpcEnvironment.cs b/src/csharp/Grpc.Core/GrpcEnvironment.cs
index e9e4cb4cbb3..58bb1802510 100644
--- a/src/csharp/Grpc.Core/GrpcEnvironment.cs
+++ b/src/csharp/Grpc.Core/GrpcEnvironment.cs
@@ -105,7 +105,7 @@ namespace Grpc.Core
 
             if (instanceToShutdown != null)
             {
-                await instanceToShutdown.ShutdownAsync();
+                await instanceToShutdown.ShutdownAsync().ConfigureAwait(false);
             }
         }
 

From 9d393a5d3c1a2609c3aa44caa3879e590f659c21 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Tue, 21 Jun 2016 15:20:19 -0700
Subject: [PATCH 138/280] slightly fancier output

---
 tools/profiling/latency_profile/run_latency_profile.sh | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/tools/profiling/latency_profile/run_latency_profile.sh b/tools/profiling/latency_profile/run_latency_profile.sh
index 40c6fcb4314..618db202dc4 100755
--- a/tools/profiling/latency_profile/run_latency_profile.sh
+++ b/tools/profiling/latency_profile/run_latency_profile.sh
@@ -96,10 +96,11 @@ fi
 make CONFIG=basicprof -j$CPUS qps_json_driver
 
 mkdir -p reports
-echo '<html><head></head><body>' > reports/index.html
 bins/basicprof/qps_json_driver --scenarios_json="$SCENARIOS_JSON_ARG"
-echo '<pre>' >> reports/index.html
+
+echo '<html><head></head><body>Latency profile for:<br/>' > reports/index.html
+echo "<p><pre>${SCENARIOS_JSON_ARG}</pre></p>" >> reports/index.html
+echo '<p><pre>' >> reports/index.html
 $PYTHON tools/profiling/latency_profile/profile_analyzer.py \
     --source=latency_trace.txt --fmt=simple >> reports/index.html
-echo '</pre>' >> reports/index.html
-echo '</body></html>' >> reports/index.html
+echo '</pre></p></body></html>' >> reports/index.html

From dacce7a1e11543ee3b3b49becc3466d967daa733 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Tue, 21 Jun 2016 16:40:20 -0700
Subject: [PATCH 139/280] fixed bad merge. c++ tests should work again

---
 test/cpp/interop/interop_client.cc | 34 ++++++++++++++----------------
 test/cpp/interop/interop_server.cc |  2 +-
 2 files changed, 17 insertions(+), 19 deletions(-)

diff --git a/test/cpp/interop/interop_client.cc b/test/cpp/interop/interop_client.cc
index cfa17e5b76c..89f841dbe96 100644
--- a/test/cpp/interop/interop_client.cc
+++ b/test/cpp/interop/interop_client.cc
@@ -537,20 +537,19 @@ bool InteropClient::DoServerCompressedStreaming() {
   InteropClientContextInspector inspector(context);
   StreamingOutputCallRequest request;
 
-  for (size_t i = 0; i < compressions.size(); i++) {
-    for (size_t j = 0; j < sizes.size(); j++) {
-      char* log_suffix;
-      gpr_asprintf(&log_suffix, "(compression=%s; size=%d)",
-                   compressions[i] ? "true" : "false", sizes[j]);
+  GPR_ASSERT(compressions.size() == sizes.size());
+  for (size_t i = 0; i < sizes.size(); i++) {
+    char* log_suffix;
+    gpr_asprintf(&log_suffix, "(compression=%s; size=%d)",
+                 compressions[i] ? "true" : "false", sizes[i]);
 
-      gpr_log(GPR_DEBUG, "Sending request streaming rpc %s.", log_suffix);
-      gpr_free(log_suffix);
+    gpr_log(GPR_DEBUG, "Sending request streaming rpc %s.", log_suffix);
+    gpr_free(log_suffix);
 
-      ResponseParameters* const response_parameter =
-          request.add_response_parameters();
-      response_parameter->mutable_compressed()->set_value(compressions[i]);
-      response_parameter->set_size(sizes[j]);
-    }
+    ResponseParameters* const response_parameter =
+        request.add_response_parameters();
+    response_parameter->mutable_compressed()->set_value(compressions[i]);
+    response_parameter->set_size(sizes[i]);
   }
   std::unique_ptr<ClientReader<StreamingOutputCallResponse>> stream(
       serviceStub_.Get()->StreamingOutputCall(&context, request));
@@ -574,14 +573,13 @@ bool InteropClient::DoServerCompressedStreaming() {
     ++k;
   }
 
-  if (k < response_stream_sizes.size()) {
+  if (k < sizes.size()) {
     // stream->Read() failed before reading all the expected messages. This
     // is most likely due to a connection failure.
-    gpr_log(GPR_ERROR,
-            "%s(): Responses read (k=%" PRIuPTR
-            ") is "
-            "less than the expected messages (i.e "
-            "response_stream_sizes.size() (%" PRIuPTR ")).",
+    gpr_log(GPR_ERROR, "%s(): Responses read (k=%" PRIuPTR
+                       ") is "
+                       "less than the expected messages (i.e "
+                       "response_stream_sizes.size() (%" PRIuPTR ")).",
             __func__, k, response_stream_sizes.size());
     return TransientFailureOrAbort();
   }
diff --git a/test/cpp/interop/interop_server.cc b/test/cpp/interop/interop_server.cc
index f0a182f2309..199fef5455b 100644
--- a/test/cpp/interop/interop_server.cc
+++ b/test/cpp/interop/interop_server.cc
@@ -222,7 +222,7 @@ class TestServiceImpl : public TestService::Service {
                          gpr_time_from_micros(time_us, GPR_TIMESPAN));
         gpr_sleep_until(sleep_time);
       }
-      write_success = writer->Write(response);
+      write_success = writer->Write(response, wopts);
     }
     if (write_success) {
       return Status::OK;

From ef01edf5b7c6eb008c7b0581354678aeeabd7680 Mon Sep 17 00:00:00 2001
From: vjpai <vpai@google.com>
Date: Tue, 21 Jun 2016 16:42:08 -0700
Subject: [PATCH 140/280] Fix review comments

---
 include/grpc++/impl/codegen/async_stream.h     | 12 ++++++------
 include/grpc++/impl/codegen/completion_queue.h | 11 ++++++-----
 include/grpc++/impl/codegen/sync_stream.h      | 12 ++++++------
 3 files changed, 18 insertions(+), 17 deletions(-)

diff --git a/include/grpc++/impl/codegen/async_stream.h b/include/grpc++/impl/codegen/async_stream.h
index c74737ce5f8..cbc5d944295 100644
--- a/include/grpc++/impl/codegen/async_stream.h
+++ b/include/grpc++/impl/codegen/async_stream.h
@@ -53,7 +53,7 @@ class ClientAsyncStreamingInterface {
   /// Request notification of the reading of the initial metadata. Completion
   /// will be notified by \a tag on the associated completion queue.
   /// This call is optional, but if it is used, it cannot be used concurrently
-  /// with Read
+  /// with or after the \a Read method.
   ///
   /// \param[in] tag Tag identifying this request.
   virtual void ReadInitialMetadata(void* tag) = 0;
@@ -74,8 +74,8 @@ class AsyncReaderInterface {
 
   /// Read a message of type \a R into \a msg. Completion will be notified by \a
   /// tag on the associated completion queue.
-  /// This is thread-safe with respect to other streaming APIs except for Finish
-  /// on the same stream.
+  /// This is thread-safe with respect to other streaming APIs except for \a
+  /// Finish on the same stream.
   ///
   /// \param[out] msg Where to eventually store the read message.
   /// \param[in] tag The tag identifying the operation.
@@ -93,7 +93,7 @@ class AsyncWriterInterface {
   /// Only one write may be outstanding at any given time. This means that
   /// after calling Write, one must wait to receive \a tag from the completion
   /// queue BEFORE calling Write again.
-  /// This is thread-safe with respect to Read
+  /// This is thread-safe with respect to \a Read
   ///
   /// \param[in] msg The message to be written.
   /// \param[in] tag The tag identifying the operation.
@@ -164,7 +164,7 @@ class ClientAsyncWriterInterface : public ClientAsyncStreamingInterface,
                                    public AsyncWriterInterface<W> {
  public:
   /// Signal the client is done with the writes.
-  /// Thread-safe with respect to Read
+  /// Thread-safe with respect to \a Read
   ///
   /// \param[in] tag The tag identifying the operation.
   virtual void WritesDone(void* tag) = 0;
@@ -236,7 +236,7 @@ class ClientAsyncReaderWriterInterface : public ClientAsyncStreamingInterface,
                                          public AsyncReaderInterface<R> {
  public:
   /// Signal the client is done with the writes.
-  /// Thread-safe with respect to Read
+  /// Thread-safe with respect to \a Read
   ///
   /// \param[in] tag The tag identifying the operation.
   virtual void WritesDone(void* tag) = 0;
diff --git a/include/grpc++/impl/codegen/completion_queue.h b/include/grpc++/impl/codegen/completion_queue.h
index f138ebe7de2..03009e0561d 100644
--- a/include/grpc++/impl/codegen/completion_queue.h
+++ b/include/grpc++/impl/codegen/completion_queue.h
@@ -34,15 +34,16 @@
 /// A completion queue implements a concurrent producer-consumer queue, with
 /// two main API-exposed methods: \a Next and \a AsyncNext. These
 /// methods are the essential component of the gRPC C++ asynchronous API.
-/// There is also a Shutdown method to indicate that a given completion queue
+/// There is also a \a Shutdown method to indicate that a given completion queue
 /// will no longer have regular events. This must be called before the
 /// completion queue is destroyed.
 /// All completion queue APIs are thread-safe and may be used concurrently with
 /// any other completion queue API invocation; it is acceptable to have
-/// multiple threads calling Next or AsyncNext on the same or different
-/// completion queues, or to call these methods concurrently with a Shutdown
-/// elsewhere. All of these should be completed, though, before a completion
-/// queue destructor is called.
+/// multiple threads calling \a Next or \a AsyncNext on the same or different
+/// completion queues, or to call these methods concurrently with a \a Shutdown
+/// elsewhere.
+/// \remark{All other API calls on completion queue should be completed before
+/// a completion queue destructor is called.}
 #ifndef GRPCXX_IMPL_CODEGEN_COMPLETION_QUEUE_H
 #define GRPCXX_IMPL_CODEGEN_COMPLETION_QUEUE_H
 
diff --git a/include/grpc++/impl/codegen/sync_stream.h b/include/grpc++/impl/codegen/sync_stream.h
index 9d7966ba04b..e53717cabfc 100644
--- a/include/grpc++/impl/codegen/sync_stream.h
+++ b/include/grpc++/impl/codegen/sync_stream.h
@@ -71,8 +71,8 @@ class ReaderInterface {
   virtual ~ReaderInterface() {}
 
   /// Blocking read a message and parse to \a msg. Returns \a true on success.
-  /// This is thread-safe with respect to other streaming APIs except for Finish
-  /// on the same stream. (Finish must be called as described above.)
+  /// This is thread-safe with respect to other streaming APIs except for \a
+  /// Finish on the same stream. (\a Finish must be called as described above.)
   ///
   /// \param[out] msg The read message.
   ///
@@ -89,7 +89,7 @@ class WriterInterface {
   virtual ~WriterInterface() {}
 
   /// Blocking write \a msg to the stream with options.
-  /// This is thread-safe with respect to Read
+  /// This is thread-safe with respect to \a Read
   ///
   /// \param msg The message to be written to the stream.
   /// \param options Options affecting the write operation.
@@ -98,7 +98,7 @@ class WriterInterface {
   virtual bool Write(const W& msg, const WriteOptions& options) = 0;
 
   /// Blocking write \a msg to the stream with default options.
-  /// This is thread-safe with respect to Read
+  /// This is thread-safe with respect to \a Read
   ///
   /// \param msg The message to be written to the stream.
   ///
@@ -179,7 +179,7 @@ class ClientWriterInterface : public ClientStreamingInterface,
  public:
   /// Half close writing from the client.
   /// Block until currently-pending writes are completed.
-  /// Thread safe with respect to Read operations only
+  /// Thread safe with respect to \a Read operations only
   ///
   /// \return Whether the writes were successful.
   virtual bool WritesDone() = 0;
@@ -263,7 +263,7 @@ class ClientReaderWriterInterface : public ClientStreamingInterface,
   virtual void WaitForInitialMetadata() = 0;
 
   /// Block until currently-pending writes are completed.
-  /// Thread-safe with respect to Read
+  /// Thread-safe with respect to \a Read
   ///
   /// \return Whether the writes were successful.
   virtual bool WritesDone() = 0;

From e89aad02bf236190f1855d1481b5549a02cf8749 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Tue, 21 Jun 2016 16:43:31 -0700
Subject: [PATCH 141/280] updated node interop server

---
 src/node/interop/interop_server.js | 13 +------------
 1 file changed, 1 insertion(+), 12 deletions(-)

diff --git a/src/node/interop/interop_server.js b/src/node/interop/interop_server.js
index 72807623054..05f52a1083d 100644
--- a/src/node/interop/interop_server.js
+++ b/src/node/interop/interop_server.js
@@ -45,9 +45,6 @@ var testProto = grpc.load({
 var ECHO_INITIAL_KEY = 'x-grpc-test-echo-initial';
 var ECHO_TRAILING_KEY = 'x-grpc-test-echo-trailing-bin';
 
-var incompressible_data = fs.readFileSync(
-    __dirname + '/../../../test/cpp/interop/rnd.dat');
-
 /**
  * Create a buffer filled with size zeroes
  * @param {number} size The length of the buffer
@@ -88,15 +85,7 @@ function getEchoTrailer(call) {
 }
 
 function getPayload(payload_type, size) {
-  if (payload_type === 'RANDOM') {
-    payload_type = ['COMPRESSABLE',
-                    'UNCOMPRESSABLE'][Math.random() < 0.5 ? 0 : 1];
-  }
-  var body;
-  switch (payload_type) {
-    case 'COMPRESSABLE': body = zeroBuffer(size); break;
-    case 'UNCOMPRESSABLE': incompressible_data.slice(size); break;
-  }
+  var body = zeroBuffer(size);
   return {type: payload_type, body: body};
 }
 

From ff32a8648270ccf9fce9d8950eee06e917177715 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Tue, 21 Jun 2016 17:07:20 -0700
Subject: [PATCH 142/280] updated the interop tests driver

---
 tools/run_tests/run_interop_tests.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/tools/run_tests/run_interop_tests.py b/tools/run_tests/run_interop_tests.py
index 0787637d758..cc146f800ac 100755
--- a/tools/run_tests/run_interop_tests.py
+++ b/tools/run_tests/run_interop_tests.py
@@ -54,7 +54,9 @@ os.chdir(ROOT)
 
 _DEFAULT_SERVER_PORT=8080
 
-_SKIP_COMPRESSION = ['large_compressed_unary',
+_SKIP_COMPRESSION = ['client_compressed_unary',
+                     'client_compressed_streaming'
+                     'server_compressed_unary',
                      'server_compressed_streaming']
 
 _SKIP_ADVANCED = ['custom_metadata', 'status_code_and_message',
@@ -345,7 +347,8 @@ _TEST_CASES = ['large_unary', 'empty_unary', 'ping_pong',
                'cancel_after_begin', 'cancel_after_first_response',
                'timeout_on_sleeping_server', 'custom_metadata',
                'status_code_and_message', 'unimplemented_method',
-               'large_compressed_unary', 'server_compressed_streaming']
+               'client_compressed_unary', 'server_compressed_unary',
+               'client_compressed_streaming', 'server_compressed_streaming']
 
 _AUTH_TEST_CASES = ['compute_engine_creds', 'jwt_token_creds',
                     'oauth2_auth_token', 'per_rpc_creds']

From 47031a8b14a501a40d8217b2a2e37764da8b5afb Mon Sep 17 00:00:00 2001
From: Ken Payson <kpayson@google.com>
Date: Wed, 4 May 2016 16:39:06 -0700
Subject: [PATCH 143/280] Add egg-info to python distribution.

Currently, grpcio cannot be used as a dependency for egg packages
(https://github.com/grpc/grpc/issues/6939)

There is likely a better solution, but this is intended as a patch
for the 0.15.0 release.
---
 PYTHON-MANIFEST.in | 1 +
 1 file changed, 1 insertion(+)

diff --git a/PYTHON-MANIFEST.in b/PYTHON-MANIFEST.in
index 534f4c1251a..3ebba6ec3fc 100644
--- a/PYTHON-MANIFEST.in
+++ b/PYTHON-MANIFEST.in
@@ -1,6 +1,7 @@
 recursive-include src/python/grpcio/grpc *.c *.h *.py *.pyx *.pxd *.pxi *.python *.pem
 recursive-exclude src/python/grpcio/grpc/_cython *.so *.pyd
 graft src/python/grpcio/tests
+graft src/python/grpcio/grpcio.egg-info
 graft src/core
 graft src/boringssl
 graft include/grpc

From 446f70e3843d9cdf40b6cf80d74bcd153032c2cf Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Tue, 21 Jun 2016 17:13:28 -0700
Subject: [PATCH 144/280] fixed faulty server streaming c++ test case

---
 test/cpp/interop/interop_server.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/test/cpp/interop/interop_server.cc b/test/cpp/interop/interop_server.cc
index 199fef5455b..ebef0002a3c 100644
--- a/test/cpp/interop/interop_server.cc
+++ b/test/cpp/interop/interop_server.cc
@@ -194,8 +194,6 @@ class TestServiceImpl : public TestService::Service {
       ServerContext* context, const StreamingOutputCallRequest* request,
       ServerWriter<StreamingOutputCallResponse>* writer) {
     StreamingOutputCallResponse response;
-    // Compress by default. Disabled on a per-message basis.
-    context->set_compression_level(GRPC_COMPRESS_LEVEL_HIGH);
     bool write_success = true;
     for (int i = 0; write_success && i < request->response_parameters_size();
          i++) {
@@ -206,6 +204,8 @@ class TestServiceImpl : public TestService::Service {
       }
       WriteOptions wopts;
       if (request->response_parameters(i).has_compressed()) {
+        // Compress by default. Disabled on a per-message basis.
+        context->set_compression_level(GRPC_COMPRESS_LEVEL_HIGH);
         const bool compression_requested =
             request->response_parameters(i).compressed().value();
         gpr_log(GPR_DEBUG, "Request for compression (%s) present for %s",

From 396f9435d5c24c4f7179cfc5f789669d3900f7fe Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Tue, 21 Jun 2016 17:33:03 -0700
Subject: [PATCH 145/280] added freaking missing comma

---
 tools/run_tests/run_interop_tests.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/run_tests/run_interop_tests.py b/tools/run_tests/run_interop_tests.py
index cc146f800ac..e3af721ee53 100755
--- a/tools/run_tests/run_interop_tests.py
+++ b/tools/run_tests/run_interop_tests.py
@@ -55,7 +55,7 @@ os.chdir(ROOT)
 _DEFAULT_SERVER_PORT=8080
 
 _SKIP_COMPRESSION = ['client_compressed_unary',
-                     'client_compressed_streaming'
+                     'client_compressed_streaming',
                      'server_compressed_unary',
                      'server_compressed_streaming']
 

From 3131c269c14f97294ebf8b6e3d1a235d4acf3317 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Tue, 21 Jun 2016 17:28:28 -0700
Subject: [PATCH 146/280] Integrate with unified error reporting

---
 src/core/lib/iomgr/ev_epoll_linux.c   | 116 +++++++++++++++++++-------
 test/core/iomgr/ev_epoll_linux_test.c |   3 +-
 2 files changed, 90 insertions(+), 29 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 7cc69c876db..d625b096a10 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -646,11 +646,18 @@ polling_island *polling_island_merge(polling_island *p, polling_island *q) {
   return q;
 }
 
-static void polling_island_global_init() {
+static grpc_error *polling_island_global_init() {
+  grpc_error *error = GRPC_ERROR_NONE;
+
   gpr_mu_init(&g_pi_freelist_mu);
   g_pi_freelist = NULL;
-  grpc_wakeup_fd_init(&polling_island_wakeup_fd);
-  grpc_wakeup_fd_wakeup(&polling_island_wakeup_fd);
+
+  error = grpc_wakeup_fd_init(&polling_island_wakeup_fd);
+  if (error == GRPC_ERROR_NONE) {
+    error = grpc_wakeup_fd_wakeup(&polling_island_wakeup_fd);
+  }
+
+  return error;
 }
 
 static void polling_island_global_shutdown() {
@@ -870,21 +877,33 @@ static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
   }
   gpr_mu_unlock(&fd->pi_mu);
 
-  grpc_exec_ctx_enqueue(exec_ctx, fd->on_done_closure, true, NULL);
+  grpc_exec_ctx_sched(exec_ctx, fd->on_done_closure, GRPC_ERROR_NONE, NULL);
 
   gpr_mu_unlock(&fd->mu);
   UNREF_BY(fd, 2, reason); /* Drop the reference */
 }
 
+static grpc_error *fd_shutdown_error(bool shutdown) {
+  if (!shutdown) {
+    return GRPC_ERROR_NONE;
+  } else {
+    return GRPC_ERROR_CREATE("FD shutdown");
+  }
+}
+
 static void notify_on_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
                              grpc_closure **st, grpc_closure *closure) {
-  if (*st == CLOSURE_NOT_READY) {
+  if (fd->shutdown) {
+    grpc_exec_ctx_sched(exec_ctx, closure, GRPC_ERROR_CREATE("FD shutdown"),
+                        NULL);
+  } else if (*st == CLOSURE_NOT_READY) {
     /* not ready ==> switch to a waiting state by setting the closure */
     *st = closure;
   } else if (*st == CLOSURE_READY) {
     /* already ready ==> queue the closure to run immediately */
     *st = CLOSURE_NOT_READY;
-    grpc_exec_ctx_enqueue(exec_ctx, closure, !fd->shutdown, NULL);
+    grpc_exec_ctx_sched(exec_ctx, closure, fd_shutdown_error(fd->shutdown),
+                        NULL);
   } else {
     /* upcallptr was set to a different closure.  This is an error! */
     gpr_log(GPR_ERROR,
@@ -906,7 +925,7 @@ static int set_ready_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
     return 0;
   } else {
     /* waiting ==> queue closure */
-    grpc_exec_ctx_enqueue(exec_ctx, *st, !fd->shutdown, NULL);
+    grpc_exec_ctx_sched(exec_ctx, *st, fd_shutdown_error(fd->shutdown), NULL);
     *st = CLOSURE_NOT_READY;
     return 1;
   }
@@ -964,11 +983,11 @@ static void sig_handler(int sig_num) {
 static void poller_kick_init() { signal(grpc_wakeup_signal, sig_handler); }
 
 /* Global state management */
-static void pollset_global_init(void) {
-  grpc_wakeup_fd_init(&grpc_global_wakeup_fd);
+static grpc_error *pollset_global_init(void) {
   gpr_tls_init(&g_current_thread_pollset);
   gpr_tls_init(&g_current_thread_worker);
   poller_kick_init();
+  return grpc_wakeup_fd_init(&grpc_global_wakeup_fd);
 }
 
 static void pollset_global_shutdown(void) {
@@ -977,8 +996,13 @@ static void pollset_global_shutdown(void) {
   gpr_tls_destroy(&g_current_thread_worker);
 }
 
-static void pollset_worker_kick(grpc_pollset_worker *worker) {
-  pthread_kill(worker->pt_id, grpc_wakeup_signal);
+static grpc_error *pollset_worker_kick(grpc_pollset_worker *worker) {
+  grpc_error *err = GRPC_ERROR_NONE;
+  int err_num = pthread_kill(worker->pt_id, grpc_wakeup_signal);
+  if (err_num != 0) {
+    err = GRPC_OS_ERROR(err_num, "pthread_kill");
+  }
+  return err;
 }
 
 /* Return 1 if the pollset has active threads in pollset_work (pollset must
@@ -1014,10 +1038,19 @@ static void push_front_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
   worker->prev->next = worker->next->prev = worker;
 }
 
+static void kick_append_error(grpc_error **composite, grpc_error *error) {
+  if (error == GRPC_ERROR_NONE) return;
+  if (*composite == GRPC_ERROR_NONE) {
+    *composite = GRPC_ERROR_CREATE("Kick Failure");
+  }
+  *composite = grpc_error_add_child(*composite, error);
+}
+
 /* p->mu must be held before calling this function */
-static void pollset_kick(grpc_pollset *p,
-                         grpc_pollset_worker *specific_worker) {
+static grpc_error *pollset_kick(grpc_pollset *p,
+                                grpc_pollset_worker *specific_worker) {
   GPR_TIMER_BEGIN("pollset_kick", 0);
+  grpc_error *error = GRPC_ERROR_NONE;
 
   grpc_pollset_worker *worker = specific_worker;
   if (worker != NULL) {
@@ -1027,7 +1060,7 @@ static void pollset_kick(grpc_pollset *p,
         for (worker = p->root_worker.next; worker != &p->root_worker;
              worker = worker->next) {
           if (gpr_tls_get(&g_current_thread_worker) != (intptr_t)worker) {
-            pollset_worker_kick(worker);
+            kick_append_error(&error, pollset_worker_kick(worker));
           }
         }
       } else {
@@ -1037,7 +1070,7 @@ static void pollset_kick(grpc_pollset *p,
     } else {
       GPR_TIMER_MARK("kicked_specifically", 0);
       if (gpr_tls_get(&g_current_thread_worker) != (intptr_t)worker) {
-        pollset_worker_kick(worker);
+        kick_append_error(&error, pollset_worker_kick(worker));
       }
     }
   } else if (gpr_tls_get(&g_current_thread_pollset) != (intptr_t)p) {
@@ -1053,7 +1086,7 @@ static void pollset_kick(grpc_pollset *p,
     if (worker != NULL) {
       GPR_TIMER_MARK("finally_kick", 0);
       push_back_worker(p, worker);
-      pollset_worker_kick(worker);
+      kick_append_error(&error, pollset_worker_kick(worker));
     } else {
       GPR_TIMER_MARK("kicked_no_pollers", 0);
       p->kicked_without_pollers = true;
@@ -1061,9 +1094,13 @@ static void pollset_kick(grpc_pollset *p,
   }
 
   GPR_TIMER_END("pollset_kick", 0);
+  GRPC_LOG_IF_ERROR("pollset_kick", GRPC_ERROR_REF(error));
+  return error;
 }
 
-static void kick_poller(void) { grpc_wakeup_fd_wakeup(&grpc_global_wakeup_fd); }
+static grpc_error *kick_poller(void) {
+  return grpc_wakeup_fd_wakeup(&grpc_global_wakeup_fd);
+}
 
 static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
   gpr_mu_init(&pollset->mu);
@@ -1139,7 +1176,7 @@ static void finish_shutdown_locked(grpc_exec_ctx *exec_ctx,
 
   /* Release the ref and set pollset->polling_island to NULL */
   pollset_release_polling_island(pollset, "ps_shutdown");
-  grpc_exec_ctx_enqueue(exec_ctx, pollset->shutdown_done, true, NULL);
+  grpc_exec_ctx_sched(exec_ctx, pollset->shutdown_done, GRPC_ERROR_NONE, NULL);
 }
 
 /* pollset->mu lock must be held by the caller before calling this */
@@ -1181,14 +1218,23 @@ static void pollset_reset(grpc_pollset *pollset) {
   pollset_release_polling_island(pollset, "ps_reset");
 }
 
+static void work_combine_error(grpc_error **composite, grpc_error *error) {
+  if (error == GRPC_ERROR_NONE) return;
+  if (*composite == GRPC_ERROR_NONE) {
+    *composite = GRPC_ERROR_CREATE("pollset_work");
+  }
+  *composite = grpc_error_add_child(*composite, error);
+}
+
 #define GRPC_EPOLL_MAX_EVENTS 1000
-static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
-                                    grpc_pollset *pollset, int timeout_ms,
-                                    sigset_t *sig_mask) {
+static grpc_error *pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
+                                           grpc_pollset *pollset,
+                                           int timeout_ms, sigset_t *sig_mask) {
   struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS];
   int epoll_fd = -1;
   int ep_rv;
   polling_island *pi = NULL;
+  grpc_error *error = GRPC_ERROR_NONE;
   GPR_TIMER_BEGIN("pollset_work_and_unlock", 0);
 
   /* We need to get the epoll_fd to wait on. The epoll_fd is in inside the
@@ -1232,6 +1278,7 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
     if (ep_rv < 0) {
       if (errno != EINTR) {
         gpr_log(GPR_ERROR, "epoll_pwait() failed: %s", strerror(errno));
+        work_combine_error(&error, GRPC_OS_ERROR(errno, "epoll_pwait"));
       } else {
         /* We were interrupted. Save an interation by doing a zero timeout
            epoll_wait to see if there are any other events of interest */
@@ -1247,7 +1294,8 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
     for (int i = 0; i < ep_rv; ++i) {
       void *data_ptr = ep_ev[i].data.ptr;
       if (data_ptr == &grpc_global_wakeup_fd) {
-        grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
+        work_combine_error(
+            &error, grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd));
       } else if (data_ptr == &polling_island_wakeup_fd) {
         /* This means that our polling island is merged with a different
            island. We do not have to do anything here since the subsequent call
@@ -1278,16 +1326,18 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
   PI_UNREF(pi, "ps_work");
 
   GPR_TIMER_END("pollset_work_and_unlock", 0);
+  return error;
 }
 
 /* pollset->mu lock must be held by the caller before calling this.
    The function pollset_work() may temporarily release the lock (pollset->mu)
    during the course of its execution but it will always re-acquire the lock and
    ensure that it is held by the time the function returns */
-static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                         grpc_pollset_worker **worker_hdl, gpr_timespec now,
-                         gpr_timespec deadline) {
+static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                                grpc_pollset_worker **worker_hdl,
+                                gpr_timespec now, gpr_timespec deadline) {
   GPR_TIMER_BEGIN("pollset_work", 0);
+  grpc_error *error = GRPC_ERROR_NONE;
   int timeout_ms = poll_deadline_to_millis_timeout(deadline, now);
 
   sigset_t new_mask;
@@ -1316,7 +1366,7 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 
     push_front_worker(pollset, &worker);
 
-    pollset_work_and_unlock(exec_ctx, pollset, timeout_ms, &orig_mask);
+    error = pollset_work_and_unlock(exec_ctx, pollset, timeout_ms, &orig_mask);
     grpc_exec_ctx_flush(exec_ctx);
 
     gpr_mu_lock(&pollset->mu);
@@ -1345,6 +1395,8 @@ static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   gpr_tls_set(&g_current_thread_pollset, (intptr_t)0);
   gpr_tls_set(&g_current_thread_worker, (intptr_t)0);
   GPR_TIMER_END("pollset_work", 0);
+  GRPC_LOG_IF_ERROR("pollset_work", GRPC_ERROR_REF(error));
+  return error;
 }
 
 static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
@@ -1659,8 +1711,16 @@ const grpc_event_engine_vtable *grpc_init_epoll_linux(void) {
   }
 
   fd_global_init();
-  pollset_global_init();
-  polling_island_global_init();
+
+  if (!GRPC_LOG_IF_ERROR("pollset_global_init", pollset_global_init())) {
+    return NULL;
+  }
+
+  if (!GRPC_LOG_IF_ERROR("polling_island_global_init",
+                         polling_island_global_init())) {
+    return NULL;
+  }
+
   return &vtable;
 }
 
diff --git a/test/core/iomgr/ev_epoll_linux_test.c b/test/core/iomgr/ev_epoll_linux_test.c
index 51da15faa7a..034f17fd58b 100644
--- a/test/core/iomgr/ev_epoll_linux_test.c
+++ b/test/core/iomgr/ev_epoll_linux_test.c
@@ -88,7 +88,8 @@ static void test_pollset_init(test_pollset *pollsets, int num_pollsets) {
   }
 }
 
-static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, bool success) {
+static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p,
+                            grpc_error *error) {
   grpc_pollset_destroy(p);
 }
 

From 0100b2f1c0b08800ba0f7f53fe9cb5fbec7881a7 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Tue, 21 Jun 2016 17:38:13 -0700
Subject: [PATCH 147/280] Make fd_shutdown idempotent

---
 src/core/lib/iomgr/ev_epoll_linux.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index d625b096a10..c077987c01b 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -942,15 +942,19 @@ static grpc_pollset *fd_get_read_notifier_pollset(grpc_exec_ctx *exec_ctx,
   return notifier;
 }
 
+/* Might be called multiple times */
 static void fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
   gpr_mu_lock(&fd->mu);
-  GPR_ASSERT(!fd->shutdown);
-  fd->shutdown = true;
-
-  /* Flush any pending read and write closures. Since fd->shutdown is 'true' at
-     this point, the closures would be called with 'success = false' */
-  set_ready_locked(exec_ctx, fd, &fd->read_closure);
-  set_ready_locked(exec_ctx, fd, &fd->write_closure);
+  /* Do the actual shutdown only once */
+  if (!fd->shutdown) {
+    fd->shutdown = true;
+
+    shutdown(fd->fd, SHUT_RDWR);
+    /* Flush any pending read and write closures. Since fd->shutdown is 'true'
+       at this point, the closures would be called with 'success = false' */
+    set_ready_locked(exec_ctx, fd, &fd->read_closure);
+    set_ready_locked(exec_ctx, fd, &fd->write_closure);
+  }
   gpr_mu_unlock(&fd->mu);
 }
 

From 24b6eae1fc71a4f5d18eb2e7c1cbca5b4e54a46f Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Tue, 21 Jun 2016 18:01:14 -0700
Subject: [PATCH 148/280] Add missing function fd_is_shutdown

---
 src/core/lib/iomgr/ev_epoll_linux.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index c077987c01b..3a774a8876f 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -942,6 +942,13 @@ static grpc_pollset *fd_get_read_notifier_pollset(grpc_exec_ctx *exec_ctx,
   return notifier;
 }
 
+static bool fd_is_shutdown(grpc_fd *fd) {
+  gpr_mu_lock(&fd->mu);
+  const bool r = fd->shutdown;
+  gpr_mu_unlock(&fd->mu);
+  return r;
+}
+
 /* Might be called multiple times */
 static void fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
   gpr_mu_lock(&fd->mu);
@@ -1659,6 +1666,7 @@ static const grpc_event_engine_vtable vtable = {
     .fd_wrapped_fd = fd_wrapped_fd,
     .fd_orphan = fd_orphan,
     .fd_shutdown = fd_shutdown,
+    .fd_is_shutdown = fd_is_shutdown,
     .fd_notify_on_read = fd_notify_on_read,
     .fd_notify_on_write = fd_notify_on_write,
     .fd_get_read_notifier_pollset = fd_get_read_notifier_pollset,

From bd28936c8648cde481fa20ca64ba00d9281cb119 Mon Sep 17 00:00:00 2001
From: vjpai <vpai@google.com>
Date: Tue, 21 Jun 2016 18:03:37 -0700
Subject: [PATCH 149/280] Properly handle reviewer comment re concurrent Read

---
 include/grpc++/impl/codegen/async_stream.h | 7 +++++--
 include/grpc++/impl/codegen/sync_stream.h  | 5 +++--
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/include/grpc++/impl/codegen/async_stream.h b/include/grpc++/impl/codegen/async_stream.h
index cbc5d944295..e96d224ddbe 100644
--- a/include/grpc++/impl/codegen/async_stream.h
+++ b/include/grpc++/impl/codegen/async_stream.h
@@ -74,8 +74,11 @@ class AsyncReaderInterface {
 
   /// Read a message of type \a R into \a msg. Completion will be notified by \a
   /// tag on the associated completion queue.
-  /// This is thread-safe with respect to other streaming APIs except for \a
-  /// Finish on the same stream.
+  /// This is thread-safe with respect to \a Write or \a WritesDone methods. It
+  /// should not be called concurrently with other streaming APIs
+  /// on the same stream. It is not meaningful to call it concurrently
+  /// with another \a Read on the same stream since reads on the same stream
+  /// are delivered in order.
   ///
   /// \param[out] msg Where to eventually store the read message.
   /// \param[in] tag The tag identifying the operation.
diff --git a/include/grpc++/impl/codegen/sync_stream.h b/include/grpc++/impl/codegen/sync_stream.h
index e53717cabfc..cbfa4106995 100644
--- a/include/grpc++/impl/codegen/sync_stream.h
+++ b/include/grpc++/impl/codegen/sync_stream.h
@@ -71,8 +71,9 @@ class ReaderInterface {
   virtual ~ReaderInterface() {}
 
   /// Blocking read a message and parse to \a msg. Returns \a true on success.
-  /// This is thread-safe with respect to other streaming APIs except for \a
-  /// Finish on the same stream. (\a Finish must be called as described above.)
+  /// This is thread-safe with respect to \a Write or \WritesDone methods on
+  /// the same stream. It should not be called concurrently with another \a
+  /// Read on the same stream as the order of delivery will not be defined.
   ///
   /// \param[out] msg The read message.
   ///

From 229533b1e68c4a4b8a67148f7fe25543584131f6 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Tue, 21 Jun 2016 20:42:52 -0700
Subject: [PATCH 150/280] Remove pollset->pi_mu since it is redundant. Also do
 not get polling island lock in the fast-path

---
 src/core/lib/iomgr/ev_epoll_linux.c | 82 ++++++++++++++++-------------
 src/core/lib/iomgr/ev_posix.c       |  6 +--
 2 files changed, 46 insertions(+), 42 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 3a774a8876f..6464d3ba348 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -207,12 +207,7 @@ struct grpc_pollset {
   bool finish_shutdown_called; /* Is the 'finish_shutdown_locked()' called ? */
   grpc_closure *shutdown_done; /* Called after after shutdown is complete */
 
-  /* The polling island to which this pollset belongs to and the mutex
-     protecting the field */
-  /* TODO: sreek: This lock might actually be adding more overhead to the
-     critical path (i.e pollset_work() function). Consider removing this lock
-     and just using the overall pollset lock */
-  gpr_mu pi_mu;
+  /* The polling island to which this pollset belongs to */
   struct polling_island *polling_island;
 };
 
@@ -488,31 +483,47 @@ static void polling_island_delete(polling_island *pi) {
   gpr_mu_unlock(&g_pi_freelist_mu);
 }
 
+/* Attempts to gets the last polling island in the linked list (liked by the
+ * 'merged_to' field). Since this does not lock the polling island, there are no
+ * guarantees that the island returned is the last island */
+static polling_island *polling_island_maybe_get_latest(polling_island *pi) {
+  polling_island *next = (polling_island *)gpr_atm_acq_load(&pi->merged_to);
+  while (next != NULL) {
+    pi = next;
+    next = (polling_island *)gpr_atm_acq_load(&pi->merged_to);
+  }
+
+  return pi;
+}
+
 /* Gets the lock on the *latest* polling island i.e the last polling island in
-   the linked list (linked by 'merged_to' link). Call gpr_mu_unlock on the
+   the linked list (linked by the 'merged_to' field). Call gpr_mu_unlock on the
    returned polling island's mu.
    Usage: To lock/unlock polling island "pi", do the following:
       polling_island *pi_latest = polling_island_lock(pi);
       ...
       ... critical section ..
       ...
-      gpr_mu_unlock(&pi_latest->mu); //NOTE: use pi_latest->mu. NOT pi->mu */
-polling_island *polling_island_lock(polling_island *pi) {
+      gpr_mu_unlock(&pi_latest->mu); // NOTE: use pi_latest->mu. NOT pi->mu */
+static polling_island *polling_island_lock(polling_island *pi) {
   polling_island *next = NULL;
+
   while (true) {
     next = (polling_island *)gpr_atm_acq_load(&pi->merged_to);
     if (next == NULL) {
-      /* pi is the last node in the linked list. Get the lock and check again
-         (under the pi->mu lock) that pi is still the last node (because a merge
-         may have happend after the (next == NULL) check above and before
-         getting the pi->mu lock.
-         If pi is the last node, we are done. If not, unlock and continue
-         traversing the list */
+      /* Looks like 'pi' is the last node in the linked list but unless we check
+         this by holding the pi->mu lock, we cannot be sure (i.e without the
+         pi->mu lock, we don't prevent island merges).
+         To be absolutely sure, check once more by holding the pi->mu lock */
       gpr_mu_lock(&pi->mu);
       next = (polling_island *)gpr_atm_acq_load(&pi->merged_to);
       if (next == NULL) {
+        /* pi is infact the last node and we have the pi->mu lock. we're done */
         break;
       }
+
+      /* pi->merged_to is not NULL i.e pi isn't the last node anymore. pi->mu
+       * isn't the lock we are interested in. Continue traversing the list */
       gpr_mu_unlock(&pi->mu);
     }
 
@@ -526,11 +537,11 @@ polling_island *polling_island_lock(polling_island *pi) {
    This function is needed because calling the following block of code to obtain
    locks on polling islands (*p and *q) is prone to deadlocks.
      {
-       polling_island_lock(*p);
-       polling_island_lock(*q);
+       polling_island_lock(*p, true);
+       polling_island_lock(*q, true);
      }
 
-   Usage/exmaple:
+   Usage/example:
      polling_island *p1;
      polling_island *p2;
      ..
@@ -551,7 +562,7 @@ polling_island *polling_island_lock(polling_island *pi) {
      }
 
 */
-void polling_island_lock_pair(polling_island **p, polling_island **q) {
+static void polling_island_lock_pair(polling_island **p, polling_island **q) {
   polling_island *pi_1 = *p;
   polling_island *pi_2 = *q;
   polling_island *next_1 = NULL;
@@ -611,7 +622,8 @@ void polling_island_lock_pair(polling_island **p, polling_island **q) {
   *q = pi_2;
 }
 
-polling_island *polling_island_merge(polling_island *p, polling_island *q) {
+static polling_island *polling_island_merge(polling_island *p,
+                                            polling_island *q) {
   /* Get locks on both the polling islands */
   polling_island_lock_pair(&p, &q);
 
@@ -1124,7 +1136,6 @@ static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
   pollset->finish_shutdown_called = false;
   pollset->shutdown_done = NULL;
 
-  gpr_mu_init(&pollset->pi_mu);
   pollset->polling_island = NULL;
 }
 
@@ -1170,12 +1181,10 @@ static void fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
 }
 
 static void pollset_release_polling_island(grpc_pollset *ps, char *reason) {
-  gpr_mu_lock(&ps->pi_mu);
   if (ps->polling_island != NULL) {
     PI_UNREF(ps->polling_island, reason);
   }
   ps->polling_island = NULL;
-  gpr_mu_unlock(&ps->pi_mu);
 }
 
 static void finish_shutdown_locked(grpc_exec_ctx *exec_ctx,
@@ -1215,7 +1224,6 @@ static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
  * here */
 static void pollset_destroy(grpc_pollset *pollset) {
   GPR_ASSERT(!pollset_has_workers(pollset));
-  gpr_mu_destroy(&pollset->pi_mu);
   gpr_mu_destroy(&pollset->mu);
 }
 
@@ -1250,22 +1258,25 @@ static grpc_error *pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
 
   /* We need to get the epoll_fd to wait on. The epoll_fd is in inside the
      latest polling island pointed by pollset->polling_island.
-     Acquire the following locks:
-     - pollset->mu (which we already have)
-     - pollset->pi_mu
-     - pollset->polling_island lock  */
-  gpr_mu_lock(&pollset->pi_mu);
+
+     Since epoll_fd is immutable, we can read it without obtaining the polling
+     island lock. There is however a possibility that the polling island (from
+     which we got the epoll_fd) got merged with another island while we are
+     in this function. This is still okay because in such a case, we will wakeup
+     right-away from epoll_wait() and pick up the latest polling_island the next
+     this function (i.e pollset_work_and_unlock()) is called.
+     */
 
   if (pollset->polling_island == NULL) {
     pollset->polling_island = polling_island_create(NULL);
     PI_ADD_REF(pollset->polling_island, "ps");
   }
 
-  pi = polling_island_lock(pollset->polling_island);
+  pi = polling_island_maybe_get_latest(pollset->polling_island);
   epoll_fd = pi->epoll_fd;
 
   /* Update the pollset->polling_island since the island being pointed by
-     pollset->polling_island may not be the latest (i.e pi) */
+     pollset->polling_island maybe older than the one pointed by pi) */
   if (pollset->polling_island != pi) {
     /* Always do PI_ADD_REF before PI_UNREF because PI_UNREF may cause the
        polling island to be deleted */
@@ -1278,9 +1289,6 @@ static grpc_error *pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
      the epoll_fd won't be closed) while we are are doing an epoll_wait() on the
      epoll_fd */
   PI_ADD_REF(pi, "ps_work");
-
-  gpr_mu_unlock(&pi->mu);
-  gpr_mu_unlock(&pollset->pi_mu);
   gpr_mu_unlock(&pollset->mu);
 
   do {
@@ -1413,7 +1421,6 @@ static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                            grpc_fd *fd) {
   gpr_mu_lock(&pollset->mu);
-  gpr_mu_lock(&pollset->pi_mu);
   gpr_mu_lock(&fd->pi_mu);
 
   polling_island *pi_new = NULL;
@@ -1465,7 +1472,6 @@ static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   }
 
   gpr_mu_unlock(&fd->pi_mu);
-  gpr_mu_unlock(&pollset->pi_mu);
   gpr_mu_unlock(&pollset->mu);
 }
 
@@ -1627,9 +1633,9 @@ void *grpc_fd_get_polling_island(grpc_fd *fd) {
 void *grpc_pollset_get_polling_island(grpc_pollset *ps) {
   polling_island *pi;
 
-  gpr_mu_lock(&ps->pi_mu);
+  gpr_mu_lock(&ps->mu);
   pi = ps->polling_island;
-  gpr_mu_unlock(&ps->pi_mu);
+  gpr_mu_unlock(&ps->mu);
 
   return pi;
 }
diff --git a/src/core/lib/iomgr/ev_posix.c b/src/core/lib/iomgr/ev_posix.c
index 4cdd13bbdba..a3c1e9db9a0 100644
--- a/src/core/lib/iomgr/ev_posix.c
+++ b/src/core/lib/iomgr/ev_posix.c
@@ -54,7 +54,7 @@
 grpc_poll_function_type grpc_poll_function = poll;
 
 static const grpc_event_engine_vtable *g_event_engine;
-static const char* g_poll_strategy_name = NULL;
+static const char *g_poll_strategy_name = NULL;
 
 typedef const grpc_event_engine_vtable *(*event_engine_factory_fn)(void);
 
@@ -111,9 +111,7 @@ static void try_engine(const char *engine) {
 }
 
 /* Call this only after calling grpc_event_engine_init() */
-const char *grpc_get_poll_strategy_name() {
-  return g_poll_strategy_name;
-}
+const char *grpc_get_poll_strategy_name() { return g_poll_strategy_name; }
 
 void grpc_event_engine_init(void) {
   char *s = gpr_getenv("GRPC_POLL_STRATEGY");

From caca0a15ded56b3732e0f67fe7d1507d9a7abf07 Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Tue, 21 Jun 2016 23:07:49 -0700
Subject: [PATCH 151/280] Build objc examples as part of automatic tests

---
 src/objective-c/tests/build_example_test.sh | 56 +++++++++++++++++++
 src/objective-c/tests/build_one_example.sh  | 62 +++++++++++++++++++++
 tools/run_tests/run_tests.py                |  4 +-
 3 files changed, 121 insertions(+), 1 deletion(-)
 create mode 100755 src/objective-c/tests/build_example_test.sh
 create mode 100755 src/objective-c/tests/build_one_example.sh

diff --git a/src/objective-c/tests/build_example_test.sh b/src/objective-c/tests/build_example_test.sh
new file mode 100755
index 00000000000..3cc0c552349
--- /dev/null
+++ b/src/objective-c/tests/build_example_test.sh
@@ -0,0 +1,56 @@
+#!/bin/bash
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Don't run this script standalone. Instead, run from the repository root:
+# ./tools/run_tests/run_tests.py -l objc
+
+set -eo pipefail
+
+cd `dirname $0`
+
+EXAMPLE_PATH=examples/objective-c/helloworld \
+SCHEME=HelloWorld                            \
+./build_one_example.sh
+
+EXAMPLE_PATH=examples/objective-c/route_guide \
+SCHEME=RouteGuideClient                       \
+./build_one_example.sh
+
+EXAMPLE_PATH=examples/objective-c/auth_sample \
+SCHEME=AuthSample                             \
+./build_one_example.sh
+
+EXAMPLE_PATH=src/objective-c/examples/Sample \
+SCHEME=Sample                                \
+./build_one_example.sh
+
+EXAMPLE_PATH=src/objective-c/examples/SwiftSample \
+SCHEME=SwiftSample                                \
+./build_one_example.sh
diff --git a/src/objective-c/tests/build_one_example.sh b/src/objective-c/tests/build_one_example.sh
new file mode 100755
index 00000000000..131fbd780df
--- /dev/null
+++ b/src/objective-c/tests/build_one_example.sh
@@ -0,0 +1,62 @@
+#!/bin/bash
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Don't run this script standalone. Instead, run from the repository root:
+# ./tools/run_tests/run_tests.py -l objc
+
+set -e
+
+# Params:
+# EXAMPLE_PATH - directory of the example
+# SCHEME - scheme of the example, used by xcodebuild
+
+# CocoaPods requires the terminal to be using UTF-8 encoding.
+export LANG=en_US.UTF-8
+
+cd `dirname $0`/../../..
+
+cd $EXAMPLE_PATH
+
+# clean the directory
+git checkout .
+git clean -df .
+rm -rf Pods
+
+pod install
+
+set -o pipefail
+XCODEBUILD_FILTER='(^===|^\*\*|\bfatal\b|\berror\b|\bwarning\b|\bfail)'
+xcodebuild \
+    clean build \
+    -workspace *.xcworkspace \
+    -scheme $SCHEME \
+    -destination name="iPhone 6" \
+    | egrep "$XCODEBUILD_FILTER" \
+    | egrep -v "(GPBDictionary|GPBArray)" -
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 9ef12c5b07e..0d77f0dbf97 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -425,7 +425,7 @@ class PythonLanguage(object):
     return []
 
   def build_steps(self):
-    return [['tools/run_tests/build_python.sh', tox_env] 
+    return [['tools/run_tests/build_python.sh', tox_env]
             for tox_env in self._tox_envs]
 
   def post_tests_steps(self):
@@ -602,6 +602,8 @@ class ObjCLanguage(object):
 
   def test_specs(self):
     return [self.config.job_spec(['src/objective-c/tests/run_tests.sh'], None,
+                                  environ=_FORCE_ENVIRON_FOR_WRAPPERS),
+            self.config.job_spec(['src/objective-c/tests/build_example_test.sh'], None,
                                   environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
 
   def pre_build_steps(self):

From f95a4898abd5888c34b31354cdbe9a909958aa08 Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Tue, 21 Jun 2016 23:27:46 -0700
Subject: [PATCH 152/280] Fixed format issues

---
 src/objective-c/tests/build_example_test.sh | 2 +-
 src/objective-c/tests/build_one_example.sh  | 2 +-
 tools/run_tests/run_tests.py                | 4 ++--
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/objective-c/tests/build_example_test.sh b/src/objective-c/tests/build_example_test.sh
index 3cc0c552349..73405695e8e 100755
--- a/src/objective-c/tests/build_example_test.sh
+++ b/src/objective-c/tests/build_example_test.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-# Copyright 2015, Google Inc.
+# Copyright 2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/objective-c/tests/build_one_example.sh b/src/objective-c/tests/build_one_example.sh
index 131fbd780df..56f686319e1 100755
--- a/src/objective-c/tests/build_one_example.sh
+++ b/src/objective-c/tests/build_one_example.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-# Copyright 2015, Google Inc.
+# Copyright 2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 0d77f0dbf97..580afc32de4 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -603,8 +603,8 @@ class ObjCLanguage(object):
   def test_specs(self):
     return [self.config.job_spec(['src/objective-c/tests/run_tests.sh'], None,
                                   environ=_FORCE_ENVIRON_FOR_WRAPPERS),
-            self.config.job_spec(['src/objective-c/tests/build_example_test.sh'], None,
-                                  environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
+            self.config.job_spec(['src/objective-c/tests/build_example_test.sh'],
+                                 None, environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
 
   def pre_build_steps(self):
     return []

From 892f8f952ae28696ff4d900aeffb0c05f1699f63 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@users.noreply.github.com>
Date: Tue, 21 Jun 2016 23:46:32 -0700
Subject: [PATCH 153/280] Update c# readme.

---
 src/csharp/README.md | 62 ++++++++++----------------------------------
 1 file changed, 14 insertions(+), 48 deletions(-)

diff --git a/src/csharp/README.md b/src/csharp/README.md
index 201c5ab0b56..b33d87ed383 100644
--- a/src/csharp/README.md
+++ b/src/csharp/README.md
@@ -19,33 +19,13 @@ PREREQUISITES
 HOW TO USE
 --------------
 
-**Windows**
+**Windows, Linux, Mac OS X**
 
-- Open Visual Studio and start a new project/solution.
+- Open Visual Studio / MonoDevelop / Xamarin Studio and start a new project/solution.
 
 - Add NuGet package `Grpc` as a dependency (Project options -> Manage NuGet Packages).
-  That will also pull all the transitive dependencies (including the gRPC native library that
-  gRPC C# is using internally).
-
-**Linux (Debian)**
-
-- Open MonoDevelop and start a new project/solution.
-
-- Add NuGet package `Grpc` as a dependency (Project -> Add NuGet packages).
-  That will also pull all the transitive dependencies (including the gRPC native library that
-  gRPC C# is using internally).
-
-- NOTE: gRPC C# doesn't have a good story yet for shipping precompiled Linux version of Protocol Buffers compiler (_protoc_) and the gRPC _protoc_ plugin. You can install them using [gRPC Linuxbrew instructions][].
-
-**Mac OS X**
-
-- Open Xamarin Studio and start a new project/solution.
-
-- Add NuGet package `Grpc` as a dependency (Project -> Add NuGet packages).
-  That will also pull all the transitive dependencies (including the gRPC native library that
-  gRPC C# is using internally).
 
-- NOTE: gRPC C# doesn't have a good story yet for shipping precompiled Mac OS X version of Protocol Buffers compiler (_protoc_) and the gRPC _protoc_ plugin. You can install them using [gRPC Homebrew instructions][].
+- To be able to generate code from Protocol Buffer (`.proto`) file definitions, add NuGet package `Grpc.Tools` that contains Protocol Buffers compiler (_protoc_) and the gRPC _protoc_ plugin.
 
 BUILD FROM SOURCE
 -----------------
@@ -61,26 +41,15 @@ If you are a user of gRPC C#, go to Usage section above.
 - Open `src\csharp\Grpc.sln` (path is relative to gRPC repository root)
   using Visual Studio
 
-**Linux**
+**Linux and Mac OS X**
 
 - The grpc_csharp_ext native library needs to be built so you can build the gRPC C# solution:
-  ```sh
-  # from the gRPC repository root
-  $ make CONFIG=dbg grpc_csharp_ext
-  ```
-
-- Use MonoDevelop to open the solution Grpc.sln
-
-**Mac OS X**
-
-- The grpc_csharp_ext native library needs to be built so you can build the gRPC C# solution.
-
   ```sh
   # from the gRPC repository root
   $ tools/run_tests/run_tests.py -c dbg -l csharp --build_only
   ```
 
-- Use Xamarin Studio to open the solution Grpc.sln
+- Use MonoDevelop / Xamarin Studio to open the solution Grpc.sln
 
 RUNNING TESTS
 -------------
@@ -102,8 +71,9 @@ tools/run_tests/run_tests.py -l csharp
 
 DOCUMENTATION
 -------------
-- the gRPC C# reference documentation is available online at [grpc.io][]
-- [Helloworld example][]
+- [API Reference][]
+- [Helloworld Example][]
+- [RouteGuide Tutorial][]
 
 CONTENTS
 --------
@@ -111,15 +81,15 @@ CONTENTS
 - ext:
   The extension library that wraps C API to be more digestible by C#.
 - Grpc.Auth:
-  gRPC OAuth2 support.
+  gRPC OAuth2/JWT support.
 - Grpc.Core:
   The main gRPC C# library.
 - Grpc.Examples:
   API examples for math.proto
 - Grpc.Examples.MathClient:
-  An example client that sends some requests to math server.
+  An example client that sends requests to math server.
 - Grpc.Examples.MathServer:
-  An example client that sends some requests to math server.
+  An example server that implements a simple math service.
 - Grpc.IntegrationTesting:
   Cross-language gRPC implementation testing (interop testing).
 
@@ -130,10 +100,6 @@ Internally, gRPC C# uses a native library written in C (gRPC C core) and invokes
 
 Prior to version 0.13, installing `grpc_csharp_ext` was required to make gRPC work on Linux and MacOS. Starting with version 0.13, we have improved the packaging story significantly and precompiled versions of the native library for all supported platforms are now shipped with the NuGet package. Just installing the `Grpc` NuGet package should be the only step needed to use gRPC C#, regardless of your platform (Windows, Linux or Mac) and the bitness (32 or 64bit).
 
-[gRPC Linuxbrew instructions]:https://github.com/grpc/homebrew-grpc#quick-install-linux
-[gRPC Homebrew instructions]:https://github.com/grpc/homebrew-grpc#quick-install-linux
-[homebrew]:http://brew.sh
-[gRPC install script]:https://raw.githubusercontent.com/grpc/homebrew-grpc/master/scripts/install
-[grpc.io]: http://www.grpc.io/docs/installation/csharp.html
-[Debian jessie-backports]:http://backports.debian.org/Instructions/
-[Helloworld example]:../../examples/csharp/helloworld
+[API Reference]: http://www.grpc.io/grpc/csharp/
+[Helloworld Example]: ../../examples/csharp/helloworld
+[RouteGuide Tutorial]: http://www.grpc.io/docs/tutorials/basic/csharp.html 

From db3ffe13cbb37ea797890c455a4543c9d030adf5 Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Wed, 22 Jun 2016 01:12:42 -0700
Subject: [PATCH 154/280] Update examples with Cocoapods 1.0.0

---
 .../AuthSample.xcodeproj/project.pbxproj      | 28 ++++++++---
 .../HelloWorld.xcodeproj/project.pbxproj      | 24 ++++-----
 .../project.pbxproj                           | 18 +++----
 .../Sample/Sample.xcodeproj/project.pbxproj   | 50 ++++++++++++-------
 .../SwiftSample.xcodeproj/project.pbxproj     | 42 ++++++++--------
 5 files changed, 95 insertions(+), 67 deletions(-)

diff --git a/examples/objective-c/auth_sample/AuthSample.xcodeproj/project.pbxproj b/examples/objective-c/auth_sample/AuthSample.xcodeproj/project.pbxproj
index 51a39c578c7..ab7419c9bcd 100644
--- a/examples/objective-c/auth_sample/AuthSample.xcodeproj/project.pbxproj
+++ b/examples/objective-c/auth_sample/AuthSample.xcodeproj/project.pbxproj
@@ -116,11 +116,12 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 63E1E9A21B28CB2100EF0978 /* Build configuration list for PBXNativeTarget "AuthSample" */;
 			buildPhases = (
-				DAABBA7B5788A39108D7CA83 /* Check Pods Manifest.lock */,
+				DAABBA7B5788A39108D7CA83 /* [CP] Check Pods Manifest.lock */,
 				63E1E9781B28CB2000EF0978 /* Sources */,
 				63E1E9791B28CB2000EF0978 /* Frameworks */,
 				63E1E97A1B28CB2000EF0978 /* Resources */,
-				AEFCCC69DD59CE8F6EB769D7 /* Copy Pods Resources */,
+				AEFCCC69DD59CE8F6EB769D7 /* [CP] Copy Pods Resources */,
+				D24F6598302C412D4B863D6F /* [CP] Embed Pods Frameworks */,
 			);
 			buildRules = (
 			);
@@ -177,14 +178,14 @@
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXShellScriptBuildPhase section */
-		AEFCCC69DD59CE8F6EB769D7 /* Copy Pods Resources */ = {
+		AEFCCC69DD59CE8F6EB769D7 /* [CP] Copy Pods Resources */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "Copy Pods Resources";
+			name = "[CP] Copy Pods Resources";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -192,14 +193,29 @@
 			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-AuthSample/Pods-AuthSample-resources.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
-		DAABBA7B5788A39108D7CA83 /* Check Pods Manifest.lock */ = {
+		D24F6598302C412D4B863D6F /* [CP] Embed Pods Frameworks */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "Check Pods Manifest.lock";
+			name = "[CP] Embed Pods Frameworks";
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-AuthSample/Pods-AuthSample-frameworks.sh\"\n";
+			showEnvVarsInLog = 0;
+		};
+		DAABBA7B5788A39108D7CA83 /* [CP] Check Pods Manifest.lock */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+			);
+			name = "[CP] Check Pods Manifest.lock";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
diff --git a/examples/objective-c/helloworld/HelloWorld.xcodeproj/project.pbxproj b/examples/objective-c/helloworld/HelloWorld.xcodeproj/project.pbxproj
index 250f009996f..df5c40cda20 100644
--- a/examples/objective-c/helloworld/HelloWorld.xcodeproj/project.pbxproj
+++ b/examples/objective-c/helloworld/HelloWorld.xcodeproj/project.pbxproj
@@ -7,7 +7,6 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
-		3EF35C14BDC2B65E21837F02 /* libPods.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 43AB08B32839A6700EA00DD4 /* libPods.a */; };
 		5E3690661B2A23800040F884 /* main.m in Sources */ = {isa = PBXBuildFile; fileRef = 5E3690651B2A23800040F884 /* main.m */; };
 		5E3690691B2A23800040F884 /* AppDelegate.m in Sources */ = {isa = PBXBuildFile; fileRef = 5E3690681B2A23800040F884 /* AppDelegate.m */; };
 		5E36906C1B2A23800040F884 /* ViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 5E36906B1B2A23800040F884 /* ViewController.m */; };
@@ -18,7 +17,6 @@
 
 /* Begin PBXFileReference section */
 		0C432EF610DB15C0F47A66BB /* Pods-HelloWorld.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-HelloWorld.release.xcconfig"; path = "Pods/Target Support Files/Pods-HelloWorld/Pods-HelloWorld.release.xcconfig"; sourceTree = "<group>"; };
-		43AB08B32839A6700EA00DD4 /* libPods.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = libPods.a; sourceTree = BUILT_PRODUCTS_DIR; };
 		5E3690601B2A23800040F884 /* HelloWorld.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = HelloWorld.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		5E3690641B2A23800040F884 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		5E3690651B2A23800040F884 /* main.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = main.m; sourceTree = "<group>"; };
@@ -37,7 +35,6 @@
 			buildActionMask = 2147483647;
 			files = (
 				EF61CF6AE2536A31D47F0E63 /* libPods-HelloWorld.a in Frameworks */,
-				3EF35C14BDC2B65E21837F02 /* libPods.a in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -88,7 +85,6 @@
 			isa = PBXGroup;
 			children = (
 				6B4E1F55F8A2EC95A0E7EE88 /* libPods-HelloWorld.a */,
-				43AB08B32839A6700EA00DD4 /* libPods.a */,
 			);
 			name = Frameworks;
 			sourceTree = "<group>";
@@ -109,12 +105,12 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 5E3690831B2A23810040F884 /* Build configuration list for PBXNativeTarget "HelloWorld" */;
 			buildPhases = (
-				ACF9162361FB8F24C70657DE /* Check Pods Manifest.lock */,
+				ACF9162361FB8F24C70657DE /* [CP] Check Pods Manifest.lock */,
 				5E36905C1B2A23800040F884 /* Sources */,
 				5E36905D1B2A23800040F884 /* Frameworks */,
 				5E36905E1B2A23800040F884 /* Resources */,
-				4C7D815378D98AB3BFC1A7D5 /* Copy Pods Resources */,
-				BB76529986A8BFAF19A385B1 /* Embed Pods Frameworks */,
+				4C7D815378D98AB3BFC1A7D5 /* [CP] Copy Pods Resources */,
+				BB76529986A8BFAF19A385B1 /* [CP] Embed Pods Frameworks */,
 			);
 			buildRules = (
 			);
@@ -170,14 +166,14 @@
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXShellScriptBuildPhase section */
-		4C7D815378D98AB3BFC1A7D5 /* Copy Pods Resources */ = {
+		4C7D815378D98AB3BFC1A7D5 /* [CP] Copy Pods Resources */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "Copy Pods Resources";
+			name = "[CP] Copy Pods Resources";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -185,14 +181,14 @@
 			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-HelloWorld/Pods-HelloWorld-resources.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
-		ACF9162361FB8F24C70657DE /* Check Pods Manifest.lock */ = {
+		ACF9162361FB8F24C70657DE /* [CP] Check Pods Manifest.lock */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "Check Pods Manifest.lock";
+			name = "[CP] Check Pods Manifest.lock";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -200,19 +196,19 @@
 			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [[ $? != 0 ]] ; then\n    cat << EOM\nerror: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\nEOM\n    exit 1\nfi\n";
 			showEnvVarsInLog = 0;
 		};
-		BB76529986A8BFAF19A385B1 /* Embed Pods Frameworks */ = {
+		BB76529986A8BFAF19A385B1 /* [CP] Embed Pods Frameworks */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "Embed Pods Frameworks";
+			name = "[CP] Embed Pods Frameworks";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods/Pods-frameworks.sh\"\n";
+			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-HelloWorld/Pods-HelloWorld-frameworks.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
 /* End PBXShellScriptBuildPhase section */
diff --git a/examples/objective-c/route_guide/RouteGuideClient.xcodeproj/project.pbxproj b/examples/objective-c/route_guide/RouteGuideClient.xcodeproj/project.pbxproj
index f99775562c0..0bb84b3b905 100644
--- a/examples/objective-c/route_guide/RouteGuideClient.xcodeproj/project.pbxproj
+++ b/examples/objective-c/route_guide/RouteGuideClient.xcodeproj/project.pbxproj
@@ -116,12 +116,12 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 632527A31B1D0396003073D9 /* Build configuration list for PBXNativeTarget "RouteGuideClient" */;
 			buildPhases = (
-				C6FC30AD2376EC04317237C5 /* Check Pods Manifest.lock */,
+				C6FC30AD2376EC04317237C5 /* [CP] Check Pods Manifest.lock */,
 				632527791B1D0395003073D9 /* Sources */,
 				6325277A1B1D0395003073D9 /* Frameworks */,
 				6325277B1B1D0395003073D9 /* Resources */,
-				FFE0BCF30339E7A50A989EAB /* Copy Pods Resources */,
-				B5388EC5A25E89021740B916 /* Embed Pods Frameworks */,
+				FFE0BCF30339E7A50A989EAB /* [CP] Copy Pods Resources */,
+				B5388EC5A25E89021740B916 /* [CP] Embed Pods Frameworks */,
 			);
 			buildRules = (
 			);
@@ -178,14 +178,14 @@
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXShellScriptBuildPhase section */
-		B5388EC5A25E89021740B916 /* Embed Pods Frameworks */ = {
+		B5388EC5A25E89021740B916 /* [CP] Embed Pods Frameworks */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "Embed Pods Frameworks";
+			name = "[CP] Embed Pods Frameworks";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -193,14 +193,14 @@
 			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-RouteGuideClient/Pods-RouteGuideClient-frameworks.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
-		C6FC30AD2376EC04317237C5 /* Check Pods Manifest.lock */ = {
+		C6FC30AD2376EC04317237C5 /* [CP] Check Pods Manifest.lock */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "Check Pods Manifest.lock";
+			name = "[CP] Check Pods Manifest.lock";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -208,14 +208,14 @@
 			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [[ $? != 0 ]] ; then\n    cat << EOM\nerror: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\nEOM\n    exit 1\nfi\n";
 			showEnvVarsInLog = 0;
 		};
-		FFE0BCF30339E7A50A989EAB /* Copy Pods Resources */ = {
+		FFE0BCF30339E7A50A989EAB /* [CP] Copy Pods Resources */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "Copy Pods Resources";
+			name = "[CP] Copy Pods Resources";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
diff --git a/src/objective-c/examples/Sample/Sample.xcodeproj/project.pbxproj b/src/objective-c/examples/Sample/Sample.xcodeproj/project.pbxproj
index 611eb6032d5..5c2a6d14f96 100644
--- a/src/objective-c/examples/Sample/Sample.xcodeproj/project.pbxproj
+++ b/src/objective-c/examples/Sample/Sample.xcodeproj/project.pbxproj
@@ -7,16 +7,16 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		426A5020E0E158A101BCA1D9 /* libPods-Sample.a in Frameworks */ = {isa = PBXBuildFile; fileRef = C20055928615A6F8434E26B4 /* libPods-Sample.a */; };
 		6369A2701A9322E20015FC5C /* main.m in Sources */ = {isa = PBXBuildFile; fileRef = 6369A26F1A9322E20015FC5C /* main.m */; };
 		6369A2731A9322E20015FC5C /* AppDelegate.m in Sources */ = {isa = PBXBuildFile; fileRef = 6369A2721A9322E20015FC5C /* AppDelegate.m */; };
 		6369A2761A9322E20015FC5C /* ViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 6369A2751A9322E20015FC5C /* ViewController.m */; };
 		6369A2791A9322E20015FC5C /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 6369A2771A9322E20015FC5C /* Main.storyboard */; };
 		6369A27B1A9322E20015FC5C /* Images.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 6369A27A1A9322E20015FC5C /* Images.xcassets */; };
-		FC81FE63CA655031F3524EC0 /* libPods.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 2DC7B7C4C0410F43B9621631 /* libPods.a */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
-		2DC7B7C4C0410F43B9621631 /* libPods.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = libPods.a; sourceTree = BUILT_PRODUCTS_DIR; };
+		5A8C9F4B28733B249DE4AB6D /* Pods-Sample.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Sample.release.xcconfig"; path = "Pods/Target Support Files/Pods-Sample/Pods-Sample.release.xcconfig"; sourceTree = "<group>"; };
 		6369A26A1A9322E20015FC5C /* Sample.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Sample.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		6369A26E1A9322E20015FC5C /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		6369A26F1A9322E20015FC5C /* main.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = main.m; sourceTree = "<group>"; };
@@ -26,8 +26,8 @@
 		6369A2751A9322E20015FC5C /* ViewController.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = ViewController.m; sourceTree = "<group>"; };
 		6369A2781A9322E20015FC5C /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/Main.storyboard; sourceTree = "<group>"; };
 		6369A27A1A9322E20015FC5C /* Images.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Images.xcassets; sourceTree = "<group>"; };
-		AC29DD6FCDF962F519FEBB0D /* Pods.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = Pods.debug.xcconfig; path = "Pods/Target Support Files/Pods/Pods.debug.xcconfig"; sourceTree = "<group>"; };
-		C68330F8D451CC6ACEABA09F /* Pods.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = Pods.release.xcconfig; path = "Pods/Target Support Files/Pods/Pods.release.xcconfig"; sourceTree = "<group>"; };
+		C20055928615A6F8434E26B4 /* libPods-Sample.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = "libPods-Sample.a"; sourceTree = BUILT_PRODUCTS_DIR; };
+		E3C01DF315C4E7433BCEC6E6 /* Pods-Sample.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Sample.debug.xcconfig"; path = "Pods/Target Support Files/Pods-Sample/Pods-Sample.debug.xcconfig"; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -35,7 +35,7 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				FC81FE63CA655031F3524EC0 /* libPods.a in Frameworks */,
+				426A5020E0E158A101BCA1D9 /* libPods-Sample.a in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -86,8 +86,8 @@
 		AB3331C9AE6488E61B2B094E /* Pods */ = {
 			isa = PBXGroup;
 			children = (
-				AC29DD6FCDF962F519FEBB0D /* Pods.debug.xcconfig */,
-				C68330F8D451CC6ACEABA09F /* Pods.release.xcconfig */,
+				E3C01DF315C4E7433BCEC6E6 /* Pods-Sample.debug.xcconfig */,
+				5A8C9F4B28733B249DE4AB6D /* Pods-Sample.release.xcconfig */,
 			);
 			name = Pods;
 			sourceTree = "<group>";
@@ -95,7 +95,7 @@
 		C4C2C5219053E079C9EFB930 /* Frameworks */ = {
 			isa = PBXGroup;
 			children = (
-				2DC7B7C4C0410F43B9621631 /* libPods.a */,
+				C20055928615A6F8434E26B4 /* libPods-Sample.a */,
 			);
 			name = Frameworks;
 			sourceTree = "<group>";
@@ -107,11 +107,12 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 6369A28D1A9322E20015FC5C /* Build configuration list for PBXNativeTarget "Sample" */;
 			buildPhases = (
-				41F7486D8F66994B0BFB84AF /* Check Pods Manifest.lock */,
+				41F7486D8F66994B0BFB84AF /* [CP] Check Pods Manifest.lock */,
 				6369A2661A9322E20015FC5C /* Sources */,
 				6369A2671A9322E20015FC5C /* Frameworks */,
 				6369A2681A9322E20015FC5C /* Resources */,
-				04554623324BE4A838846086 /* Copy Pods Resources */,
+				04554623324BE4A838846086 /* [CP] Copy Pods Resources */,
+				C7FAD018D05AB5F0B0FE81E2 /* [CP] Embed Pods Frameworks */,
 			);
 			buildRules = (
 			);
@@ -167,29 +168,29 @@
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXShellScriptBuildPhase section */
-		04554623324BE4A838846086 /* Copy Pods Resources */ = {
+		04554623324BE4A838846086 /* [CP] Copy Pods Resources */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "Copy Pods Resources";
+			name = "[CP] Copy Pods Resources";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods/Pods-resources.sh\"\n";
+			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-Sample/Pods-Sample-resources.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
-		41F7486D8F66994B0BFB84AF /* Check Pods Manifest.lock */ = {
+		41F7486D8F66994B0BFB84AF /* [CP] Check Pods Manifest.lock */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "Check Pods Manifest.lock";
+			name = "[CP] Check Pods Manifest.lock";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -197,6 +198,21 @@
 			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [[ $? != 0 ]] ; then\n    cat << EOM\nerror: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\nEOM\n    exit 1\nfi\n";
 			showEnvVarsInLog = 0;
 		};
+		C7FAD018D05AB5F0B0FE81E2 /* [CP] Embed Pods Frameworks */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+			);
+			name = "[CP] Embed Pods Frameworks";
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-Sample/Pods-Sample-frameworks.sh\"\n";
+			showEnvVarsInLog = 0;
+		};
 /* End PBXShellScriptBuildPhase section */
 
 /* Begin PBXSourcesBuildPhase section */
@@ -304,7 +320,7 @@
 		};
 		6369A28E1A9322E20015FC5C /* Debug */ = {
 			isa = XCBuildConfiguration;
-			baseConfigurationReference = AC29DD6FCDF962F519FEBB0D /* Pods.debug.xcconfig */;
+			baseConfigurationReference = E3C01DF315C4E7433BCEC6E6 /* Pods-Sample.debug.xcconfig */;
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				INFOPLIST_FILE = Sample/Info.plist;
@@ -315,7 +331,7 @@
 		};
 		6369A28F1A9322E20015FC5C /* Release */ = {
 			isa = XCBuildConfiguration;
-			baseConfigurationReference = C68330F8D451CC6ACEABA09F /* Pods.release.xcconfig */;
+			baseConfigurationReference = 5A8C9F4B28733B249DE4AB6D /* Pods-Sample.release.xcconfig */;
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				INFOPLIST_FILE = Sample/Info.plist;
diff --git a/src/objective-c/examples/SwiftSample/SwiftSample.xcodeproj/project.pbxproj b/src/objective-c/examples/SwiftSample/SwiftSample.xcodeproj/project.pbxproj
index 2f5716082bf..2a1b30f2cf9 100644
--- a/src/objective-c/examples/SwiftSample/SwiftSample.xcodeproj/project.pbxproj
+++ b/src/objective-c/examples/SwiftSample/SwiftSample.xcodeproj/project.pbxproj
@@ -7,15 +7,14 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
-		253D3A297105CA46DA960A11 /* libPods.a in Frameworks */ = {isa = PBXBuildFile; fileRef = DC58ACA18DCCB1553531B885 /* libPods.a */; };
 		633BFFC81B950B210007E424 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 633BFFC71B950B210007E424 /* AppDelegate.swift */; };
 		633BFFCA1B950B210007E424 /* ViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 633BFFC91B950B210007E424 /* ViewController.swift */; };
 		633BFFCD1B950B210007E424 /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 633BFFCB1B950B210007E424 /* Main.storyboard */; };
 		633BFFCF1B950B210007E424 /* Images.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 633BFFCE1B950B210007E424 /* Images.xcassets */; };
+		92EDB1408A1E1E7DDAB25D9C /* libPods-SwiftSample.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 69BB5C6CA3C1F97E007AC527 /* libPods-SwiftSample.a */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
-		12C7B447AA80E624D93B5C54 /* Pods.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = Pods.debug.xcconfig; path = "Pods/Target Support Files/Pods/Pods.debug.xcconfig"; sourceTree = "<group>"; };
 		633BFFC21B950B210007E424 /* SwiftSample.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = SwiftSample.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		633BFFC61B950B210007E424 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		633BFFC71B950B210007E424 /* AppDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
@@ -23,8 +22,9 @@
 		633BFFCC1B950B210007E424 /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/Main.storyboard; sourceTree = "<group>"; };
 		633BFFCE1B950B210007E424 /* Images.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Images.xcassets; sourceTree = "<group>"; };
 		6367AD231B951655007FD3A4 /* Bridging-Header.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "Bridging-Header.h"; sourceTree = "<group>"; };
-		C335CBC4C160E0D9EDEE646B /* Pods.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = Pods.release.xcconfig; path = "Pods/Target Support Files/Pods/Pods.release.xcconfig"; sourceTree = "<group>"; };
-		DC58ACA18DCCB1553531B885 /* libPods.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = libPods.a; sourceTree = BUILT_PRODUCTS_DIR; };
+		69BB5C6CA3C1F97E007AC527 /* libPods-SwiftSample.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = "libPods-SwiftSample.a"; sourceTree = BUILT_PRODUCTS_DIR; };
+		A7E614A494D89D01BB395761 /* Pods-SwiftSample.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-SwiftSample.debug.xcconfig"; path = "Pods/Target Support Files/Pods-SwiftSample/Pods-SwiftSample.debug.xcconfig"; sourceTree = "<group>"; };
+		C314E3E246AF23AC29B38FCF /* Pods-SwiftSample.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-SwiftSample.release.xcconfig"; path = "Pods/Target Support Files/Pods-SwiftSample/Pods-SwiftSample.release.xcconfig"; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -32,7 +32,7 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				253D3A297105CA46DA960A11 /* libPods.a in Frameworks */,
+				92EDB1408A1E1E7DDAB25D9C /* libPods-SwiftSample.a in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -42,8 +42,8 @@
 		31F283C976AE97586C17CCD9 /* Pods */ = {
 			isa = PBXGroup;
 			children = (
-				12C7B447AA80E624D93B5C54 /* Pods.debug.xcconfig */,
-				C335CBC4C160E0D9EDEE646B /* Pods.release.xcconfig */,
+				A7E614A494D89D01BB395761 /* Pods-SwiftSample.debug.xcconfig */,
+				C314E3E246AF23AC29B38FCF /* Pods-SwiftSample.release.xcconfig */,
 			);
 			name = Pods;
 			sourceTree = "<group>";
@@ -90,7 +90,7 @@
 		9D63A7F6423989BA306810CA /* Frameworks */ = {
 			isa = PBXGroup;
 			children = (
-				DC58ACA18DCCB1553531B885 /* libPods.a */,
+				69BB5C6CA3C1F97E007AC527 /* libPods-SwiftSample.a */,
 			);
 			name = Frameworks;
 			sourceTree = "<group>";
@@ -102,12 +102,12 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 633BFFE11B950B210007E424 /* Build configuration list for PBXNativeTarget "SwiftSample" */;
 			buildPhases = (
-				6BEEB33CA2705D7D2F2210E6 /* Check Pods Manifest.lock */,
+				6BEEB33CA2705D7D2F2210E6 /* [CP] Check Pods Manifest.lock */,
 				633BFFBE1B950B210007E424 /* Sources */,
 				633BFFBF1B950B210007E424 /* Frameworks */,
 				633BFFC01B950B210007E424 /* Resources */,
-				AC2F6F9AB1C090BB0BEE6E4D /* Copy Pods Resources */,
-				A1738A987353B0BF2C64F0F7 /* Embed Pods Frameworks */,
+				AC2F6F9AB1C090BB0BEE6E4D /* [CP] Copy Pods Resources */,
+				A1738A987353B0BF2C64F0F7 /* [CP] Embed Pods Frameworks */,
 			);
 			buildRules = (
 			);
@@ -164,14 +164,14 @@
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXShellScriptBuildPhase section */
-		6BEEB33CA2705D7D2F2210E6 /* Check Pods Manifest.lock */ = {
+		6BEEB33CA2705D7D2F2210E6 /* [CP] Check Pods Manifest.lock */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "Check Pods Manifest.lock";
+			name = "[CP] Check Pods Manifest.lock";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -179,34 +179,34 @@
 			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [[ $? != 0 ]] ; then\n    cat << EOM\nerror: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\nEOM\n    exit 1\nfi\n";
 			showEnvVarsInLog = 0;
 		};
-		A1738A987353B0BF2C64F0F7 /* Embed Pods Frameworks */ = {
+		A1738A987353B0BF2C64F0F7 /* [CP] Embed Pods Frameworks */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "Embed Pods Frameworks";
+			name = "[CP] Embed Pods Frameworks";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods/Pods-frameworks.sh\"\n";
+			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-SwiftSample/Pods-SwiftSample-frameworks.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
-		AC2F6F9AB1C090BB0BEE6E4D /* Copy Pods Resources */ = {
+		AC2F6F9AB1C090BB0BEE6E4D /* [CP] Copy Pods Resources */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "Copy Pods Resources";
+			name = "[CP] Copy Pods Resources";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods/Pods-resources.sh\"\n";
+			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-SwiftSample/Pods-SwiftSample-resources.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
 /* End PBXShellScriptBuildPhase section */
@@ -320,7 +320,7 @@
 		};
 		633BFFE21B950B210007E424 /* Debug */ = {
 			isa = XCBuildConfiguration;
-			baseConfigurationReference = 12C7B447AA80E624D93B5C54 /* Pods.debug.xcconfig */;
+			baseConfigurationReference = A7E614A494D89D01BB395761 /* Pods-SwiftSample.debug.xcconfig */;
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				INFOPLIST_FILE = Info.plist;
@@ -333,7 +333,7 @@
 		};
 		633BFFE31B950B210007E424 /* Release */ = {
 			isa = XCBuildConfiguration;
-			baseConfigurationReference = C335CBC4C160E0D9EDEE646B /* Pods.release.xcconfig */;
+			baseConfigurationReference = C314E3E246AF23AC29B38FCF /* Pods-SwiftSample.release.xcconfig */;
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				INFOPLIST_FILE = Info.plist;

From c0668c837b0ee48f64d0a912e2c6120f2ab719c5 Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Wed, 22 Jun 2016 01:30:47 -0700
Subject: [PATCH 155/280] Increase timeout_seconds for build_example_test

---
 tools/run_tests/run_tests.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 580afc32de4..5c8f6f2a0e7 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -604,7 +604,8 @@ class ObjCLanguage(object):
     return [self.config.job_spec(['src/objective-c/tests/run_tests.sh'], None,
                                   environ=_FORCE_ENVIRON_FOR_WRAPPERS),
             self.config.job_spec(['src/objective-c/tests/build_example_test.sh'],
-                                 None, environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
+                                 timeout_seconds=15*60, None,
+                                 environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
 
   def pre_build_steps(self):
     return []

From a2dd8385f95259b8a6886902dac87d5df7c7b953 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Wed, 22 Jun 2016 10:26:03 -0700
Subject: [PATCH 156/280] Use pipe fds instead of event fds for the test

---
 test/core/iomgr/ev_epoll_linux_test.c | 55 +++++++++++++++++----------
 1 file changed, 34 insertions(+), 21 deletions(-)

diff --git a/test/core/iomgr/ev_epoll_linux_test.c b/test/core/iomgr/ev_epoll_linux_test.c
index 034f17fd58b..35eb6791302 100644
--- a/test/core/iomgr/ev_epoll_linux_test.c
+++ b/test/core/iomgr/ev_epoll_linux_test.c
@@ -34,9 +34,8 @@
 #include "src/core/lib/iomgr/ev_epoll_linux.h"
 #include "src/core/lib/iomgr/ev_posix.h"
 
-#include <poll.h>
+#include <errno.h>
 #include <string.h>
-#include <sys/eventfd.h>
 #include <unistd.h>
 
 #include <grpc/support/alloc.h>
@@ -55,28 +54,29 @@ typedef struct test_fd {
   grpc_fd *fd;
 } test_fd;
 
-static void test_fd_init(test_fd *fds, int num_fds) {
+/* num_fds should be an even number */
+static void test_fd_init(test_fd *tfds, int *fds, int num_fds) {
   int i;
   for (i = 0; i < num_fds; i++) {
-    fds[i].inner_fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
-    fds[i].fd = grpc_fd_create(fds[i].inner_fd, "test_fd");
+    tfds[i].inner_fd = fds[i];
+    tfds[i].fd = grpc_fd_create(fds[i], "test_fd");
   }
 }
 
-static void test_fd_cleanup(grpc_exec_ctx *exec_ctx, test_fd *fds,
+static void test_fd_cleanup(grpc_exec_ctx *exec_ctx, test_fd *tfds,
                             int num_fds) {
   int release_fd;
   int i;
 
   for (i = 0; i < num_fds; i++) {
-    grpc_fd_shutdown(exec_ctx, fds[i].fd);
+    grpc_fd_shutdown(exec_ctx, tfds[i].fd);
     grpc_exec_ctx_flush(exec_ctx);
 
-    grpc_fd_orphan(exec_ctx, fds[i].fd, NULL, &release_fd, "test_fd_cleanup");
+    grpc_fd_orphan(exec_ctx, tfds[i].fd, NULL, &release_fd, "test_fd_cleanup");
     grpc_exec_ctx_flush(exec_ctx);
 
-    GPR_ASSERT(release_fd == fds[i].inner_fd);
-    close(fds[i].inner_fd);
+    GPR_ASSERT(release_fd == tfds[i].inner_fd);
+    close(tfds[i].inner_fd);
   }
 }
 
@@ -121,12 +121,25 @@ static void test_pollset_cleanup(grpc_exec_ctx *exec_ctx,
  * */
 static void test_add_fd_to_pollset() {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  test_fd fds[NUM_FDS];
+  test_fd tfds[NUM_FDS];
+  int fds[NUM_FDS];
   test_pollset pollsets[NUM_POLLSETS];
   void *expected_pi = NULL;
   int i;
+  int r;
+
+  /* Create some dummy file descriptors (using pipe fds for this test. Could be
+     anything). Also NUM_FDS should be even for this test. */
+  for (i = 0; i < NUM_FDS; i = i + 2) {
+    r = pipe(fds + i);
+    if (r != 0) {
+      gpr_log(GPR_ERROR, "Error in creating pipe. %d (%s)", errno,
+              strerror(errno));
+      return;
+    }
+  }
 
-  test_fd_init(fds, NUM_FDS);
+  test_fd_init(tfds, fds, NUM_FDS);
   test_pollset_init(pollsets, NUM_POLLSETS);
 
   /*Step 1.
@@ -156,41 +169,41 @@ static void test_add_fd_to_pollset() {
 
   /* == Step 1 == */
   for (i = 0; i <= 2; i++) {
-    grpc_pollset_add_fd(&exec_ctx, pollsets[0].pollset, fds[i].fd);
+    grpc_pollset_add_fd(&exec_ctx, pollsets[0].pollset, tfds[i].fd);
     grpc_exec_ctx_flush(&exec_ctx);
   }
 
   for (i = 3; i <= 4; i++) {
-    grpc_pollset_add_fd(&exec_ctx, pollsets[1].pollset, fds[i].fd);
+    grpc_pollset_add_fd(&exec_ctx, pollsets[1].pollset, tfds[i].fd);
     grpc_exec_ctx_flush(&exec_ctx);
   }
 
   for (i = 5; i <= 7; i++) {
-    grpc_pollset_add_fd(&exec_ctx, pollsets[2].pollset, fds[i].fd);
+    grpc_pollset_add_fd(&exec_ctx, pollsets[2].pollset, tfds[i].fd);
     grpc_exec_ctx_flush(&exec_ctx);
   }
 
   /* == Step 2 == */
   for (i = 0; i <= 1; i++) {
-    grpc_pollset_add_fd(&exec_ctx, pollsets[3].pollset, fds[i].fd);
+    grpc_pollset_add_fd(&exec_ctx, pollsets[3].pollset, tfds[i].fd);
     grpc_exec_ctx_flush(&exec_ctx);
   }
 
   /* == Step 3 == */
-  grpc_pollset_add_fd(&exec_ctx, pollsets[1].pollset, fds[0].fd);
+  grpc_pollset_add_fd(&exec_ctx, pollsets[1].pollset, tfds[0].fd);
   grpc_exec_ctx_flush(&exec_ctx);
 
   /* == Step 4 == */
-  grpc_pollset_add_fd(&exec_ctx, pollsets[2].pollset, fds[3].fd);
+  grpc_pollset_add_fd(&exec_ctx, pollsets[2].pollset, tfds[3].fd);
   grpc_exec_ctx_flush(&exec_ctx);
 
   /* All polling islands are merged at this point */
 
   /* Compare Fd:0's polling island with that of all other Fds */
-  expected_pi = grpc_fd_get_polling_island(fds[0].fd);
+  expected_pi = grpc_fd_get_polling_island(tfds[0].fd);
   for (i = 1; i < NUM_FDS; i++) {
     GPR_ASSERT(grpc_are_polling_islands_equal(
-        expected_pi, grpc_fd_get_polling_island(fds[i].fd)));
+        expected_pi, grpc_fd_get_polling_island(tfds[i].fd)));
   }
 
   /* Compare Fd:0's polling island with that of all other pollsets */
@@ -199,7 +212,7 @@ static void test_add_fd_to_pollset() {
         expected_pi, grpc_pollset_get_polling_island(pollsets[i].pollset)));
   }
 
-  test_fd_cleanup(&exec_ctx, fds, NUM_FDS);
+  test_fd_cleanup(&exec_ctx, tfds, NUM_FDS);
   test_pollset_cleanup(&exec_ctx, pollsets, NUM_POLLSETS);
   grpc_exec_ctx_finish(&exec_ctx);
 }

From 82393efe0c930f7756e9d0e427d2e9ae61e0a88e Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Wed, 22 Jun 2016 10:29:17 -0700
Subject: [PATCH 157/280] Fix run_test.py

---
 tools/run_tests/run_tests.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 5c8f6f2a0e7..2a404df0d41 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -604,7 +604,7 @@ class ObjCLanguage(object):
     return [self.config.job_spec(['src/objective-c/tests/run_tests.sh'], None,
                                   environ=_FORCE_ENVIRON_FOR_WRAPPERS),
             self.config.job_spec(['src/objective-c/tests/build_example_test.sh'],
-                                 timeout_seconds=15*60, None,
+                                 None, timeout_seconds=15*60,
                                  environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
 
   def pre_build_steps(self):

From 0d896ef906f6a57f10832764611598d457d0e947 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Tue, 21 Jun 2016 18:17:27 -0700
Subject: [PATCH 158/280] fix reading of compressed byte_buffer in C#

---
 src/csharp/ext/grpc_csharp_ext.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/csharp/ext/grpc_csharp_ext.c b/src/csharp/ext/grpc_csharp_ext.c
index 4782654250c..9b8d050ea51 100644
--- a/src/csharp/ext/grpc_csharp_ext.c
+++ b/src/csharp/ext/grpc_csharp_ext.c
@@ -249,10 +249,12 @@ grpcsharp_batch_context_recv_initial_metadata(
 
 GPR_EXPORT intptr_t GPR_CALLTYPE grpcsharp_batch_context_recv_message_length(
     const grpcsharp_batch_context *ctx) {
+  grpc_byte_buffer_reader reader;
   if (!ctx->recv_message) {
     return -1;
   }
-  return (intptr_t)grpc_byte_buffer_length(ctx->recv_message);
+  grpc_byte_buffer_reader_init(&reader, ctx->recv_message);
+  return (intptr_t)grpc_byte_buffer_length(reader.buffer_out);
 }
 
 /*

From 4047d5d4b642a3eb33100feda4b82d04179263f6 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Tue, 21 Jun 2016 20:53:56 -0700
Subject: [PATCH 159/280] add test that C# can read compressed messages

---
 src/csharp/Grpc.Core.Tests/CompressionTest.cs | 26 +++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/src/csharp/Grpc.Core.Tests/CompressionTest.cs b/src/csharp/Grpc.Core.Tests/CompressionTest.cs
index 378c81851c0..f2f2931e480 100644
--- a/src/csharp/Grpc.Core.Tests/CompressionTest.cs
+++ b/src/csharp/Grpc.Core.Tests/CompressionTest.cs
@@ -34,6 +34,7 @@
 using System;
 using System.Diagnostics;
 using System.Linq;
+using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 using Grpc.Core;
@@ -118,5 +119,30 @@ namespace Grpc.Core.Tests
 
             await call.ResponseStream.ToListAsync();
         }
+
+        [Test]
+        public void CanReadCompressedMessages()
+        {
+            var compressionMetadata = new Metadata
+            {
+                { new Metadata.Entry("grpc-internal-encoding-request", "gzip") }
+            };
+
+            helper.UnaryHandler = new UnaryServerMethod<string, string>(async (req, context) =>
+            {
+                await context.WriteResponseHeadersAsync(compressionMetadata);
+                return req;
+            });
+
+            var stringBuilder = new StringBuilder();
+            for (int i = 0; i < 200000; i++)
+            {
+                stringBuilder.Append('a');
+            }
+            var request = stringBuilder.ToString();
+            var response = Calls.BlockingUnaryCall(helper.CreateUnaryCall(new CallOptions(compressionMetadata)), request);
+
+            Assert.AreEqual(request, response);
+        }
     }
 }

From 67ceba531971a2344a11be21ef5685b66e2609f1 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Tue, 21 Jun 2016 18:29:09 -0700
Subject: [PATCH 160/280] regenerate messages.proto

---
 .../Grpc.IntegrationTesting/Messages.cs       | 414 +++++++++++++-----
 1 file changed, 301 insertions(+), 113 deletions(-)

diff --git a/src/csharp/Grpc.IntegrationTesting/Messages.cs b/src/csharp/Grpc.IntegrationTesting/Messages.cs
index d42501aa5b8..1240db128b0 100644
--- a/src/csharp/Grpc.IntegrationTesting/Messages.cs
+++ b/src/csharp/Grpc.IntegrationTesting/Messages.cs
@@ -24,46 +24,48 @@ namespace Grpc.Testing {
       byte[] descriptorData = global::System.Convert.FromBase64String(
           string.Concat(
             "CiVzcmMvcHJvdG8vZ3JwYy90ZXN0aW5nL21lc3NhZ2VzLnByb3RvEgxncnBj",
-            "LnRlc3RpbmciQAoHUGF5bG9hZBInCgR0eXBlGAEgASgOMhkuZ3JwYy50ZXN0",
-            "aW5nLlBheWxvYWRUeXBlEgwKBGJvZHkYAiABKAwiKwoKRWNob1N0YXR1cxIM",
-            "CgRjb2RlGAEgASgFEg8KB21lc3NhZ2UYAiABKAkioQIKDVNpbXBsZVJlcXVl",
-            "c3QSMAoNcmVzcG9uc2VfdHlwZRgBIAEoDjIZLmdycGMudGVzdGluZy5QYXls",
-            "b2FkVHlwZRIVCg1yZXNwb25zZV9zaXplGAIgASgFEiYKB3BheWxvYWQYAyAB",
-            "KAsyFS5ncnBjLnRlc3RpbmcuUGF5bG9hZBIVCg1maWxsX3VzZXJuYW1lGAQg",
-            "ASgIEhgKEGZpbGxfb2F1dGhfc2NvcGUYBSABKAgSOwoUcmVzcG9uc2VfY29t",
-            "cHJlc3Npb24YBiABKA4yHS5ncnBjLnRlc3RpbmcuQ29tcHJlc3Npb25UeXBl",
-            "EjEKD3Jlc3BvbnNlX3N0YXR1cxgHIAEoCzIYLmdycGMudGVzdGluZy5FY2hv",
-            "U3RhdHVzIl8KDlNpbXBsZVJlc3BvbnNlEiYKB3BheWxvYWQYASABKAsyFS5n",
-            "cnBjLnRlc3RpbmcuUGF5bG9hZBIQCgh1c2VybmFtZRgCIAEoCRITCgtvYXV0",
-            "aF9zY29wZRgDIAEoCSJDChlTdHJlYW1pbmdJbnB1dENhbGxSZXF1ZXN0EiYK",
-            "B3BheWxvYWQYASABKAsyFS5ncnBjLnRlc3RpbmcuUGF5bG9hZCI9ChpTdHJl",
-            "YW1pbmdJbnB1dENhbGxSZXNwb25zZRIfChdhZ2dyZWdhdGVkX3BheWxvYWRf",
-            "c2l6ZRgBIAEoBSI3ChJSZXNwb25zZVBhcmFtZXRlcnMSDAoEc2l6ZRgBIAEo",
-            "BRITCgtpbnRlcnZhbF91cxgCIAEoBSKlAgoaU3RyZWFtaW5nT3V0cHV0Q2Fs",
-            "bFJlcXVlc3QSMAoNcmVzcG9uc2VfdHlwZRgBIAEoDjIZLmdycGMudGVzdGlu",
-            "Zy5QYXlsb2FkVHlwZRI9ChNyZXNwb25zZV9wYXJhbWV0ZXJzGAIgAygLMiAu",
-            "Z3JwYy50ZXN0aW5nLlJlc3BvbnNlUGFyYW1ldGVycxImCgdwYXlsb2FkGAMg",
-            "ASgLMhUuZ3JwYy50ZXN0aW5nLlBheWxvYWQSOwoUcmVzcG9uc2VfY29tcHJl",
-            "c3Npb24YBiABKA4yHS5ncnBjLnRlc3RpbmcuQ29tcHJlc3Npb25UeXBlEjEK",
-            "D3Jlc3BvbnNlX3N0YXR1cxgHIAEoCzIYLmdycGMudGVzdGluZy5FY2hvU3Rh",
-            "dHVzIkUKG1N0cmVhbWluZ091dHB1dENhbGxSZXNwb25zZRImCgdwYXlsb2Fk",
-            "GAEgASgLMhUuZ3JwYy50ZXN0aW5nLlBheWxvYWQiMwoPUmVjb25uZWN0UGFy",
-            "YW1zEiAKGG1heF9yZWNvbm5lY3RfYmFja29mZl9tcxgBIAEoBSIzCg1SZWNv",
-            "bm5lY3RJbmZvEg4KBnBhc3NlZBgBIAEoCBISCgpiYWNrb2ZmX21zGAIgAygF",
-            "Kj8KC1BheWxvYWRUeXBlEhAKDENPTVBSRVNTQUJMRRAAEhIKDlVOQ09NUFJF",
-            "U1NBQkxFEAESCgoGUkFORE9NEAIqMgoPQ29tcHJlc3Npb25UeXBlEggKBE5P",
-            "TkUQABIICgRHWklQEAESCwoHREVGTEFURRACYgZwcm90bzM="));
+            "LnRlc3RpbmciGgoJQm9vbFZhbHVlEg0KBXZhbHVlGAEgASgIIkAKB1BheWxv",
+            "YWQSJwoEdHlwZRgBIAEoDjIZLmdycGMudGVzdGluZy5QYXlsb2FkVHlwZRIM",
+            "CgRib2R5GAIgASgMIisKCkVjaG9TdGF0dXMSDAoEY29kZRgBIAEoBRIPCgdt",
+            "ZXNzYWdlGAIgASgJIs4CCg1TaW1wbGVSZXF1ZXN0EjAKDXJlc3BvbnNlX3R5",
+            "cGUYASABKA4yGS5ncnBjLnRlc3RpbmcuUGF5bG9hZFR5cGUSFQoNcmVzcG9u",
+            "c2Vfc2l6ZRgCIAEoBRImCgdwYXlsb2FkGAMgASgLMhUuZ3JwYy50ZXN0aW5n",
+            "LlBheWxvYWQSFQoNZmlsbF91c2VybmFtZRgEIAEoCBIYChBmaWxsX29hdXRo",
+            "X3Njb3BlGAUgASgIEjQKE3Jlc3BvbnNlX2NvbXByZXNzZWQYBiABKAsyFy5n",
+            "cnBjLnRlc3RpbmcuQm9vbFZhbHVlEjEKD3Jlc3BvbnNlX3N0YXR1cxgHIAEo",
+            "CzIYLmdycGMudGVzdGluZy5FY2hvU3RhdHVzEjIKEWV4cGVjdF9jb21wcmVz",
+            "c2VkGAggASgLMhcuZ3JwYy50ZXN0aW5nLkJvb2xWYWx1ZSJfCg5TaW1wbGVS",
+            "ZXNwb25zZRImCgdwYXlsb2FkGAEgASgLMhUuZ3JwYy50ZXN0aW5nLlBheWxv",
+            "YWQSEAoIdXNlcm5hbWUYAiABKAkSEwoLb2F1dGhfc2NvcGUYAyABKAkidwoZ",
+            "U3RyZWFtaW5nSW5wdXRDYWxsUmVxdWVzdBImCgdwYXlsb2FkGAEgASgLMhUu",
+            "Z3JwYy50ZXN0aW5nLlBheWxvYWQSMgoRZXhwZWN0X2NvbXByZXNzZWQYAiAB",
+            "KAsyFy5ncnBjLnRlc3RpbmcuQm9vbFZhbHVlIj0KGlN0cmVhbWluZ0lucHV0",
+            "Q2FsbFJlc3BvbnNlEh8KF2FnZ3JlZ2F0ZWRfcGF5bG9hZF9zaXplGAEgASgF",
+            "ImQKElJlc3BvbnNlUGFyYW1ldGVycxIMCgRzaXplGAEgASgFEhMKC2ludGVy",
+            "dmFsX3VzGAIgASgFEisKCmNvbXByZXNzZWQYAyABKAsyFy5ncnBjLnRlc3Rp",
+            "bmcuQm9vbFZhbHVlIugBChpTdHJlYW1pbmdPdXRwdXRDYWxsUmVxdWVzdBIw",
+            "Cg1yZXNwb25zZV90eXBlGAEgASgOMhkuZ3JwYy50ZXN0aW5nLlBheWxvYWRU",
+            "eXBlEj0KE3Jlc3BvbnNlX3BhcmFtZXRlcnMYAiADKAsyIC5ncnBjLnRlc3Rp",
+            "bmcuUmVzcG9uc2VQYXJhbWV0ZXJzEiYKB3BheWxvYWQYAyABKAsyFS5ncnBj",
+            "LnRlc3RpbmcuUGF5bG9hZBIxCg9yZXNwb25zZV9zdGF0dXMYByABKAsyGC5n",
+            "cnBjLnRlc3RpbmcuRWNob1N0YXR1cyJFChtTdHJlYW1pbmdPdXRwdXRDYWxs",
+            "UmVzcG9uc2USJgoHcGF5bG9hZBgBIAEoCzIVLmdycGMudGVzdGluZy5QYXls",
+            "b2FkIjMKD1JlY29ubmVjdFBhcmFtcxIgChhtYXhfcmVjb25uZWN0X2JhY2tv",
+            "ZmZfbXMYASABKAUiMwoNUmVjb25uZWN0SW5mbxIOCgZwYXNzZWQYASABKAgS",
+            "EgoKYmFja29mZl9tcxgCIAMoBSofCgtQYXlsb2FkVHlwZRIQCgxDT01QUkVT",
+            "U0FCTEUQAGIGcHJvdG8z"));
       descriptor = pbr::FileDescriptor.FromGeneratedCode(descriptorData,
           new pbr::FileDescriptor[] { },
-          new pbr::GeneratedClrTypeInfo(new[] {typeof(global::Grpc.Testing.PayloadType), typeof(global::Grpc.Testing.CompressionType), }, new pbr::GeneratedClrTypeInfo[] {
+          new pbr::GeneratedClrTypeInfo(new[] {typeof(global::Grpc.Testing.PayloadType), }, new pbr::GeneratedClrTypeInfo[] {
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.BoolValue), global::Grpc.Testing.BoolValue.Parser, new[]{ "Value" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.Payload), global::Grpc.Testing.Payload.Parser, new[]{ "Type", "Body" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.EchoStatus), global::Grpc.Testing.EchoStatus.Parser, new[]{ "Code", "Message" }, null, null, null),
-            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.SimpleRequest), global::Grpc.Testing.SimpleRequest.Parser, new[]{ "ResponseType", "ResponseSize", "Payload", "FillUsername", "FillOauthScope", "ResponseCompression", "ResponseStatus" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.SimpleRequest), global::Grpc.Testing.SimpleRequest.Parser, new[]{ "ResponseType", "ResponseSize", "Payload", "FillUsername", "FillOauthScope", "ResponseCompressed", "ResponseStatus", "ExpectCompressed" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.SimpleResponse), global::Grpc.Testing.SimpleResponse.Parser, new[]{ "Payload", "Username", "OauthScope" }, null, null, null),
-            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.StreamingInputCallRequest), global::Grpc.Testing.StreamingInputCallRequest.Parser, new[]{ "Payload" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.StreamingInputCallRequest), global::Grpc.Testing.StreamingInputCallRequest.Parser, new[]{ "Payload", "ExpectCompressed" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.StreamingInputCallResponse), global::Grpc.Testing.StreamingInputCallResponse.Parser, new[]{ "AggregatedPayloadSize" }, null, null, null),
-            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ResponseParameters), global::Grpc.Testing.ResponseParameters.Parser, new[]{ "Size", "IntervalUs" }, null, null, null),
-            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.StreamingOutputCallRequest), global::Grpc.Testing.StreamingOutputCallRequest.Parser, new[]{ "ResponseType", "ResponseParameters", "Payload", "ResponseCompression", "ResponseStatus" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ResponseParameters), global::Grpc.Testing.ResponseParameters.Parser, new[]{ "Size", "IntervalUs", "Compressed" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.StreamingOutputCallRequest), global::Grpc.Testing.StreamingOutputCallRequest.Parser, new[]{ "ResponseType", "ResponseParameters", "Payload", "ResponseStatus" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.StreamingOutputCallResponse), global::Grpc.Testing.StreamingOutputCallResponse.Parser, new[]{ "Payload" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ReconnectParams), global::Grpc.Testing.ReconnectParams.Parser, new[]{ "MaxReconnectBackoffMs" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::Grpc.Testing.ReconnectInfo), global::Grpc.Testing.ReconnectInfo.Parser, new[]{ "Passed", "BackoffMs" }, null, null, null)
@@ -74,6 +76,7 @@ namespace Grpc.Testing {
   }
   #region Enums
   /// <summary>
+  ///  DEPRECATED, don't use. To be removed shortly.
   ///  The type of payload that should be returned.
   /// </summary>
   public enum PayloadType {
@@ -81,31 +84,122 @@ namespace Grpc.Testing {
     ///  Compressable text format.
     /// </summary>
     [pbr::OriginalName("COMPRESSABLE")] Compressable = 0,
-    /// <summary>
-    ///  Uncompressable binary format.
-    /// </summary>
-    [pbr::OriginalName("UNCOMPRESSABLE")] Uncompressable = 1,
-    /// <summary>
-    ///  Randomly chosen from all other formats defined in this enum.
-    /// </summary>
-    [pbr::OriginalName("RANDOM")] Random = 2,
   }
 
+  #endregion
+
+  #region Messages
   /// <summary>
-  ///  Compression algorithms
+  ///  TODO(dgq): Go back to using well-known types once
+  ///  https://github.com/grpc/grpc/issues/6980 has been fixed.
+  ///  import "google/protobuf/wrappers.proto";
   /// </summary>
-  public enum CompressionType {
+  [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+  public sealed partial class BoolValue : pb::IMessage<BoolValue> {
+    private static readonly pb::MessageParser<BoolValue> _parser = new pb::MessageParser<BoolValue>(() => new BoolValue());
+    public static pb::MessageParser<BoolValue> Parser { get { return _parser; } }
+
+    public static pbr::MessageDescriptor Descriptor {
+      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[0]; }
+    }
+
+    pbr::MessageDescriptor pb::IMessage.Descriptor {
+      get { return Descriptor; }
+    }
+
+    public BoolValue() {
+      OnConstruction();
+    }
+
+    partial void OnConstruction();
+
+    public BoolValue(BoolValue other) : this() {
+      value_ = other.value_;
+    }
+
+    public BoolValue Clone() {
+      return new BoolValue(this);
+    }
+
+    /// <summary>Field number for the "value" field.</summary>
+    public const int ValueFieldNumber = 1;
+    private bool value_;
     /// <summary>
-    ///  No compression
+    ///  The bool value.
     /// </summary>
-    [pbr::OriginalName("NONE")] None = 0,
-    [pbr::OriginalName("GZIP")] Gzip = 1,
-    [pbr::OriginalName("DEFLATE")] Deflate = 2,
-  }
+    public bool Value {
+      get { return value_; }
+      set {
+        value_ = value;
+      }
+    }
 
-  #endregion
+    public override bool Equals(object other) {
+      return Equals(other as BoolValue);
+    }
+
+    public bool Equals(BoolValue other) {
+      if (ReferenceEquals(other, null)) {
+        return false;
+      }
+      if (ReferenceEquals(other, this)) {
+        return true;
+      }
+      if (Value != other.Value) return false;
+      return true;
+    }
+
+    public override int GetHashCode() {
+      int hash = 1;
+      if (Value != false) hash ^= Value.GetHashCode();
+      return hash;
+    }
+
+    public override string ToString() {
+      return pb::JsonFormatter.ToDiagnosticString(this);
+    }
+
+    public void WriteTo(pb::CodedOutputStream output) {
+      if (Value != false) {
+        output.WriteRawTag(8);
+        output.WriteBool(Value);
+      }
+    }
+
+    public int CalculateSize() {
+      int size = 0;
+      if (Value != false) {
+        size += 1 + 1;
+      }
+      return size;
+    }
+
+    public void MergeFrom(BoolValue other) {
+      if (other == null) {
+        return;
+      }
+      if (other.Value != false) {
+        Value = other.Value;
+      }
+    }
+
+    public void MergeFrom(pb::CodedInputStream input) {
+      uint tag;
+      while ((tag = input.ReadTag()) != 0) {
+        switch(tag) {
+          default:
+            input.SkipLastField();
+            break;
+          case 8: {
+            Value = input.ReadBool();
+            break;
+          }
+        }
+      }
+    }
+
+  }
 
-  #region Messages
   /// <summary>
   ///  A block of data, to simply increase gRPC message size.
   /// </summary>
@@ -115,7 +209,7 @@ namespace Grpc.Testing {
     public static pb::MessageParser<Payload> Parser { get { return _parser; } }
 
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[0]; }
+      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[1]; }
     }
 
     pbr::MessageDescriptor pb::IMessage.Descriptor {
@@ -141,6 +235,7 @@ namespace Grpc.Testing {
     public const int TypeFieldNumber = 1;
     private global::Grpc.Testing.PayloadType type_ = 0;
     /// <summary>
+    ///  DEPRECATED, don't use. To be removed shortly.
     ///  The type of data in body.
     /// </summary>
     public global::Grpc.Testing.PayloadType Type {
@@ -255,7 +350,7 @@ namespace Grpc.Testing {
     public static pb::MessageParser<EchoStatus> Parser { get { return _parser; } }
 
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[1]; }
+      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[2]; }
     }
 
     pbr::MessageDescriptor pb::IMessage.Descriptor {
@@ -388,7 +483,7 @@ namespace Grpc.Testing {
     public static pb::MessageParser<SimpleRequest> Parser { get { return _parser; } }
 
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[2]; }
+      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[3]; }
     }
 
     pbr::MessageDescriptor pb::IMessage.Descriptor {
@@ -407,8 +502,9 @@ namespace Grpc.Testing {
       Payload = other.payload_ != null ? other.Payload.Clone() : null;
       fillUsername_ = other.fillUsername_;
       fillOauthScope_ = other.fillOauthScope_;
-      responseCompression_ = other.responseCompression_;
+      ResponseCompressed = other.responseCompressed_ != null ? other.ResponseCompressed.Clone() : null;
       ResponseStatus = other.responseStatus_ != null ? other.ResponseStatus.Clone() : null;
+      ExpectCompressed = other.expectCompressed_ != null ? other.ExpectCompressed.Clone() : null;
     }
 
     public SimpleRequest Clone() {
@@ -419,6 +515,7 @@ namespace Grpc.Testing {
     public const int ResponseTypeFieldNumber = 1;
     private global::Grpc.Testing.PayloadType responseType_ = 0;
     /// <summary>
+    ///  DEPRECATED, don't use. To be removed shortly.
     ///  Desired payload type in the response from the server.
     ///  If response_type is RANDOM, server randomly chooses one from other formats.
     /// </summary>
@@ -434,7 +531,6 @@ namespace Grpc.Testing {
     private int responseSize_;
     /// <summary>
     ///  Desired payload size in the response from the server.
-    ///  If response_type is COMPRESSABLE, this denotes the size before compression.
     /// </summary>
     public int ResponseSize {
       get { return responseSize_; }
@@ -482,16 +578,19 @@ namespace Grpc.Testing {
       }
     }
 
-    /// <summary>Field number for the "response_compression" field.</summary>
-    public const int ResponseCompressionFieldNumber = 6;
-    private global::Grpc.Testing.CompressionType responseCompression_ = 0;
+    /// <summary>Field number for the "response_compressed" field.</summary>
+    public const int ResponseCompressedFieldNumber = 6;
+    private global::Grpc.Testing.BoolValue responseCompressed_;
     /// <summary>
-    ///  Compression algorithm to be used by the server for the response (stream)
+    ///  Whether to request the server to compress the response. This field is
+    ///  "nullable" in order to interoperate seamlessly with clients not able to
+    ///  implement the full compression tests by introspecting the call to verify
+    ///  the response's compression status.
     /// </summary>
-    public global::Grpc.Testing.CompressionType ResponseCompression {
-      get { return responseCompression_; }
+    public global::Grpc.Testing.BoolValue ResponseCompressed {
+      get { return responseCompressed_; }
       set {
-        responseCompression_ = value;
+        responseCompressed_ = value;
       }
     }
 
@@ -508,6 +607,19 @@ namespace Grpc.Testing {
       }
     }
 
+    /// <summary>Field number for the "expect_compressed" field.</summary>
+    public const int ExpectCompressedFieldNumber = 8;
+    private global::Grpc.Testing.BoolValue expectCompressed_;
+    /// <summary>
+    ///  Whether the server should expect this request to be compressed.
+    /// </summary>
+    public global::Grpc.Testing.BoolValue ExpectCompressed {
+      get { return expectCompressed_; }
+      set {
+        expectCompressed_ = value;
+      }
+    }
+
     public override bool Equals(object other) {
       return Equals(other as SimpleRequest);
     }
@@ -524,8 +636,9 @@ namespace Grpc.Testing {
       if (!object.Equals(Payload, other.Payload)) return false;
       if (FillUsername != other.FillUsername) return false;
       if (FillOauthScope != other.FillOauthScope) return false;
-      if (ResponseCompression != other.ResponseCompression) return false;
+      if (!object.Equals(ResponseCompressed, other.ResponseCompressed)) return false;
       if (!object.Equals(ResponseStatus, other.ResponseStatus)) return false;
+      if (!object.Equals(ExpectCompressed, other.ExpectCompressed)) return false;
       return true;
     }
 
@@ -536,8 +649,9 @@ namespace Grpc.Testing {
       if (payload_ != null) hash ^= Payload.GetHashCode();
       if (FillUsername != false) hash ^= FillUsername.GetHashCode();
       if (FillOauthScope != false) hash ^= FillOauthScope.GetHashCode();
-      if (ResponseCompression != 0) hash ^= ResponseCompression.GetHashCode();
+      if (responseCompressed_ != null) hash ^= ResponseCompressed.GetHashCode();
       if (responseStatus_ != null) hash ^= ResponseStatus.GetHashCode();
+      if (expectCompressed_ != null) hash ^= ExpectCompressed.GetHashCode();
       return hash;
     }
 
@@ -566,14 +680,18 @@ namespace Grpc.Testing {
         output.WriteRawTag(40);
         output.WriteBool(FillOauthScope);
       }
-      if (ResponseCompression != 0) {
-        output.WriteRawTag(48);
-        output.WriteEnum((int) ResponseCompression);
+      if (responseCompressed_ != null) {
+        output.WriteRawTag(50);
+        output.WriteMessage(ResponseCompressed);
       }
       if (responseStatus_ != null) {
         output.WriteRawTag(58);
         output.WriteMessage(ResponseStatus);
       }
+      if (expectCompressed_ != null) {
+        output.WriteRawTag(66);
+        output.WriteMessage(ExpectCompressed);
+      }
     }
 
     public int CalculateSize() {
@@ -593,12 +711,15 @@ namespace Grpc.Testing {
       if (FillOauthScope != false) {
         size += 1 + 1;
       }
-      if (ResponseCompression != 0) {
-        size += 1 + pb::CodedOutputStream.ComputeEnumSize((int) ResponseCompression);
+      if (responseCompressed_ != null) {
+        size += 1 + pb::CodedOutputStream.ComputeMessageSize(ResponseCompressed);
       }
       if (responseStatus_ != null) {
         size += 1 + pb::CodedOutputStream.ComputeMessageSize(ResponseStatus);
       }
+      if (expectCompressed_ != null) {
+        size += 1 + pb::CodedOutputStream.ComputeMessageSize(ExpectCompressed);
+      }
       return size;
     }
 
@@ -624,8 +745,11 @@ namespace Grpc.Testing {
       if (other.FillOauthScope != false) {
         FillOauthScope = other.FillOauthScope;
       }
-      if (other.ResponseCompression != 0) {
-        ResponseCompression = other.ResponseCompression;
+      if (other.responseCompressed_ != null) {
+        if (responseCompressed_ == null) {
+          responseCompressed_ = new global::Grpc.Testing.BoolValue();
+        }
+        ResponseCompressed.MergeFrom(other.ResponseCompressed);
       }
       if (other.responseStatus_ != null) {
         if (responseStatus_ == null) {
@@ -633,6 +757,12 @@ namespace Grpc.Testing {
         }
         ResponseStatus.MergeFrom(other.ResponseStatus);
       }
+      if (other.expectCompressed_ != null) {
+        if (expectCompressed_ == null) {
+          expectCompressed_ = new global::Grpc.Testing.BoolValue();
+        }
+        ExpectCompressed.MergeFrom(other.ExpectCompressed);
+      }
     }
 
     public void MergeFrom(pb::CodedInputStream input) {
@@ -665,8 +795,11 @@ namespace Grpc.Testing {
             FillOauthScope = input.ReadBool();
             break;
           }
-          case 48: {
-            responseCompression_ = (global::Grpc.Testing.CompressionType) input.ReadEnum();
+          case 50: {
+            if (responseCompressed_ == null) {
+              responseCompressed_ = new global::Grpc.Testing.BoolValue();
+            }
+            input.ReadMessage(responseCompressed_);
             break;
           }
           case 58: {
@@ -676,6 +809,13 @@ namespace Grpc.Testing {
             input.ReadMessage(responseStatus_);
             break;
           }
+          case 66: {
+            if (expectCompressed_ == null) {
+              expectCompressed_ = new global::Grpc.Testing.BoolValue();
+            }
+            input.ReadMessage(expectCompressed_);
+            break;
+          }
         }
       }
     }
@@ -691,7 +831,7 @@ namespace Grpc.Testing {
     public static pb::MessageParser<SimpleResponse> Parser { get { return _parser; } }
 
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[3]; }
+      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[4]; }
     }
 
     pbr::MessageDescriptor pb::IMessage.Descriptor {
@@ -867,7 +1007,7 @@ namespace Grpc.Testing {
     public static pb::MessageParser<StreamingInputCallRequest> Parser { get { return _parser; } }
 
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[4]; }
+      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[5]; }
     }
 
     pbr::MessageDescriptor pb::IMessage.Descriptor {
@@ -882,6 +1022,7 @@ namespace Grpc.Testing {
 
     public StreamingInputCallRequest(StreamingInputCallRequest other) : this() {
       Payload = other.payload_ != null ? other.Payload.Clone() : null;
+      ExpectCompressed = other.expectCompressed_ != null ? other.ExpectCompressed.Clone() : null;
     }
 
     public StreamingInputCallRequest Clone() {
@@ -901,6 +1042,22 @@ namespace Grpc.Testing {
       }
     }
 
+    /// <summary>Field number for the "expect_compressed" field.</summary>
+    public const int ExpectCompressedFieldNumber = 2;
+    private global::Grpc.Testing.BoolValue expectCompressed_;
+    /// <summary>
+    ///  Whether the server should expect this request to be compressed. This field
+    ///  is "nullable" in order to interoperate seamlessly with servers not able to
+    ///  implement the full compression tests by introspecting the call to verify
+    ///  the request's compression status.
+    /// </summary>
+    public global::Grpc.Testing.BoolValue ExpectCompressed {
+      get { return expectCompressed_; }
+      set {
+        expectCompressed_ = value;
+      }
+    }
+
     public override bool Equals(object other) {
       return Equals(other as StreamingInputCallRequest);
     }
@@ -913,12 +1070,14 @@ namespace Grpc.Testing {
         return true;
       }
       if (!object.Equals(Payload, other.Payload)) return false;
+      if (!object.Equals(ExpectCompressed, other.ExpectCompressed)) return false;
       return true;
     }
 
     public override int GetHashCode() {
       int hash = 1;
       if (payload_ != null) hash ^= Payload.GetHashCode();
+      if (expectCompressed_ != null) hash ^= ExpectCompressed.GetHashCode();
       return hash;
     }
 
@@ -931,6 +1090,10 @@ namespace Grpc.Testing {
         output.WriteRawTag(10);
         output.WriteMessage(Payload);
       }
+      if (expectCompressed_ != null) {
+        output.WriteRawTag(18);
+        output.WriteMessage(ExpectCompressed);
+      }
     }
 
     public int CalculateSize() {
@@ -938,6 +1101,9 @@ namespace Grpc.Testing {
       if (payload_ != null) {
         size += 1 + pb::CodedOutputStream.ComputeMessageSize(Payload);
       }
+      if (expectCompressed_ != null) {
+        size += 1 + pb::CodedOutputStream.ComputeMessageSize(ExpectCompressed);
+      }
       return size;
     }
 
@@ -951,6 +1117,12 @@ namespace Grpc.Testing {
         }
         Payload.MergeFrom(other.Payload);
       }
+      if (other.expectCompressed_ != null) {
+        if (expectCompressed_ == null) {
+          expectCompressed_ = new global::Grpc.Testing.BoolValue();
+        }
+        ExpectCompressed.MergeFrom(other.ExpectCompressed);
+      }
     }
 
     public void MergeFrom(pb::CodedInputStream input) {
@@ -967,6 +1139,13 @@ namespace Grpc.Testing {
             input.ReadMessage(payload_);
             break;
           }
+          case 18: {
+            if (expectCompressed_ == null) {
+              expectCompressed_ = new global::Grpc.Testing.BoolValue();
+            }
+            input.ReadMessage(expectCompressed_);
+            break;
+          }
         }
       }
     }
@@ -982,7 +1161,7 @@ namespace Grpc.Testing {
     public static pb::MessageParser<StreamingInputCallResponse> Parser { get { return _parser; } }
 
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[5]; }
+      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[6]; }
     }
 
     pbr::MessageDescriptor pb::IMessage.Descriptor {
@@ -1091,7 +1270,7 @@ namespace Grpc.Testing {
     public static pb::MessageParser<ResponseParameters> Parser { get { return _parser; } }
 
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[6]; }
+      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[7]; }
     }
 
     pbr::MessageDescriptor pb::IMessage.Descriptor {
@@ -1107,6 +1286,7 @@ namespace Grpc.Testing {
     public ResponseParameters(ResponseParameters other) : this() {
       size_ = other.size_;
       intervalUs_ = other.intervalUs_;
+      Compressed = other.compressed_ != null ? other.Compressed.Clone() : null;
     }
 
     public ResponseParameters Clone() {
@@ -1118,7 +1298,6 @@ namespace Grpc.Testing {
     private int size_;
     /// <summary>
     ///  Desired payload sizes in responses from the server.
-    ///  If response_type is COMPRESSABLE, this denotes the size before compression.
     /// </summary>
     public int Size {
       get { return size_; }
@@ -1141,6 +1320,22 @@ namespace Grpc.Testing {
       }
     }
 
+    /// <summary>Field number for the "compressed" field.</summary>
+    public const int CompressedFieldNumber = 3;
+    private global::Grpc.Testing.BoolValue compressed_;
+    /// <summary>
+    ///  Whether to request the server to compress the response. This field is
+    ///  "nullable" in order to interoperate seamlessly with clients not able to
+    ///  implement the full compression tests by introspecting the call to verify
+    ///  the response's compression status.
+    /// </summary>
+    public global::Grpc.Testing.BoolValue Compressed {
+      get { return compressed_; }
+      set {
+        compressed_ = value;
+      }
+    }
+
     public override bool Equals(object other) {
       return Equals(other as ResponseParameters);
     }
@@ -1154,6 +1349,7 @@ namespace Grpc.Testing {
       }
       if (Size != other.Size) return false;
       if (IntervalUs != other.IntervalUs) return false;
+      if (!object.Equals(Compressed, other.Compressed)) return false;
       return true;
     }
 
@@ -1161,6 +1357,7 @@ namespace Grpc.Testing {
       int hash = 1;
       if (Size != 0) hash ^= Size.GetHashCode();
       if (IntervalUs != 0) hash ^= IntervalUs.GetHashCode();
+      if (compressed_ != null) hash ^= Compressed.GetHashCode();
       return hash;
     }
 
@@ -1177,6 +1374,10 @@ namespace Grpc.Testing {
         output.WriteRawTag(16);
         output.WriteInt32(IntervalUs);
       }
+      if (compressed_ != null) {
+        output.WriteRawTag(26);
+        output.WriteMessage(Compressed);
+      }
     }
 
     public int CalculateSize() {
@@ -1187,6 +1388,9 @@ namespace Grpc.Testing {
       if (IntervalUs != 0) {
         size += 1 + pb::CodedOutputStream.ComputeInt32Size(IntervalUs);
       }
+      if (compressed_ != null) {
+        size += 1 + pb::CodedOutputStream.ComputeMessageSize(Compressed);
+      }
       return size;
     }
 
@@ -1200,6 +1404,12 @@ namespace Grpc.Testing {
       if (other.IntervalUs != 0) {
         IntervalUs = other.IntervalUs;
       }
+      if (other.compressed_ != null) {
+        if (compressed_ == null) {
+          compressed_ = new global::Grpc.Testing.BoolValue();
+        }
+        Compressed.MergeFrom(other.Compressed);
+      }
     }
 
     public void MergeFrom(pb::CodedInputStream input) {
@@ -1217,6 +1427,13 @@ namespace Grpc.Testing {
             IntervalUs = input.ReadInt32();
             break;
           }
+          case 26: {
+            if (compressed_ == null) {
+              compressed_ = new global::Grpc.Testing.BoolValue();
+            }
+            input.ReadMessage(compressed_);
+            break;
+          }
         }
       }
     }
@@ -1232,7 +1449,7 @@ namespace Grpc.Testing {
     public static pb::MessageParser<StreamingOutputCallRequest> Parser { get { return _parser; } }
 
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[7]; }
+      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[8]; }
     }
 
     pbr::MessageDescriptor pb::IMessage.Descriptor {
@@ -1249,7 +1466,6 @@ namespace Grpc.Testing {
       responseType_ = other.responseType_;
       responseParameters_ = other.responseParameters_.Clone();
       Payload = other.payload_ != null ? other.Payload.Clone() : null;
-      responseCompression_ = other.responseCompression_;
       ResponseStatus = other.responseStatus_ != null ? other.ResponseStatus.Clone() : null;
     }
 
@@ -1261,6 +1477,7 @@ namespace Grpc.Testing {
     public const int ResponseTypeFieldNumber = 1;
     private global::Grpc.Testing.PayloadType responseType_ = 0;
     /// <summary>
+    ///  DEPRECATED, don't use. To be removed shortly.
     ///  Desired payload type in the response from the server.
     ///  If response_type is RANDOM, the payload from each response in the stream
     ///  might be of different types. This is to simulate a mixed type of payload
@@ -1298,19 +1515,6 @@ namespace Grpc.Testing {
       }
     }
 
-    /// <summary>Field number for the "response_compression" field.</summary>
-    public const int ResponseCompressionFieldNumber = 6;
-    private global::Grpc.Testing.CompressionType responseCompression_ = 0;
-    /// <summary>
-    ///  Compression algorithm to be used by the server for the response (stream)
-    /// </summary>
-    public global::Grpc.Testing.CompressionType ResponseCompression {
-      get { return responseCompression_; }
-      set {
-        responseCompression_ = value;
-      }
-    }
-
     /// <summary>Field number for the "response_status" field.</summary>
     public const int ResponseStatusFieldNumber = 7;
     private global::Grpc.Testing.EchoStatus responseStatus_;
@@ -1338,7 +1542,6 @@ namespace Grpc.Testing {
       if (ResponseType != other.ResponseType) return false;
       if(!responseParameters_.Equals(other.responseParameters_)) return false;
       if (!object.Equals(Payload, other.Payload)) return false;
-      if (ResponseCompression != other.ResponseCompression) return false;
       if (!object.Equals(ResponseStatus, other.ResponseStatus)) return false;
       return true;
     }
@@ -1348,7 +1551,6 @@ namespace Grpc.Testing {
       if (ResponseType != 0) hash ^= ResponseType.GetHashCode();
       hash ^= responseParameters_.GetHashCode();
       if (payload_ != null) hash ^= Payload.GetHashCode();
-      if (ResponseCompression != 0) hash ^= ResponseCompression.GetHashCode();
       if (responseStatus_ != null) hash ^= ResponseStatus.GetHashCode();
       return hash;
     }
@@ -1367,10 +1569,6 @@ namespace Grpc.Testing {
         output.WriteRawTag(26);
         output.WriteMessage(Payload);
       }
-      if (ResponseCompression != 0) {
-        output.WriteRawTag(48);
-        output.WriteEnum((int) ResponseCompression);
-      }
       if (responseStatus_ != null) {
         output.WriteRawTag(58);
         output.WriteMessage(ResponseStatus);
@@ -1386,9 +1584,6 @@ namespace Grpc.Testing {
       if (payload_ != null) {
         size += 1 + pb::CodedOutputStream.ComputeMessageSize(Payload);
       }
-      if (ResponseCompression != 0) {
-        size += 1 + pb::CodedOutputStream.ComputeEnumSize((int) ResponseCompression);
-      }
       if (responseStatus_ != null) {
         size += 1 + pb::CodedOutputStream.ComputeMessageSize(ResponseStatus);
       }
@@ -1409,9 +1604,6 @@ namespace Grpc.Testing {
         }
         Payload.MergeFrom(other.Payload);
       }
-      if (other.ResponseCompression != 0) {
-        ResponseCompression = other.ResponseCompression;
-      }
       if (other.responseStatus_ != null) {
         if (responseStatus_ == null) {
           responseStatus_ = new global::Grpc.Testing.EchoStatus();
@@ -1442,10 +1634,6 @@ namespace Grpc.Testing {
             input.ReadMessage(payload_);
             break;
           }
-          case 48: {
-            responseCompression_ = (global::Grpc.Testing.CompressionType) input.ReadEnum();
-            break;
-          }
           case 58: {
             if (responseStatus_ == null) {
               responseStatus_ = new global::Grpc.Testing.EchoStatus();
@@ -1468,7 +1656,7 @@ namespace Grpc.Testing {
     public static pb::MessageParser<StreamingOutputCallResponse> Parser { get { return _parser; } }
 
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[8]; }
+      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[9]; }
     }
 
     pbr::MessageDescriptor pb::IMessage.Descriptor {
@@ -1584,7 +1772,7 @@ namespace Grpc.Testing {
     public static pb::MessageParser<ReconnectParams> Parser { get { return _parser; } }
 
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[9]; }
+      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[10]; }
     }
 
     pbr::MessageDescriptor pb::IMessage.Descriptor {
@@ -1692,7 +1880,7 @@ namespace Grpc.Testing {
     public static pb::MessageParser<ReconnectInfo> Parser { get { return _parser; } }
 
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[10]; }
+      get { return global::Grpc.Testing.MessagesReflection.Descriptor.MessageTypes[11]; }
     }
 
     pbr::MessageDescriptor pb::IMessage.Descriptor {

From f8135f6b05238237ec5ed635ecf1f5a4ba9b3301 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Tue, 21 Jun 2016 18:41:09 -0700
Subject: [PATCH 161/280] remove occurences of compressable payload type

---
 .../Grpc.IntegrationTesting/InteropClient.cs  | 23 -------------------
 1 file changed, 23 deletions(-)

diff --git a/src/csharp/Grpc.IntegrationTesting/InteropClient.cs b/src/csharp/Grpc.IntegrationTesting/InteropClient.cs
index d273867a6a7..834c276c64d 100644
--- a/src/csharp/Grpc.IntegrationTesting/InteropClient.cs
+++ b/src/csharp/Grpc.IntegrationTesting/InteropClient.cs
@@ -240,13 +240,11 @@ namespace Grpc.IntegrationTesting
             Console.WriteLine("running large_unary");
             var request = new SimpleRequest
             {
-                ResponseType = PayloadType.Compressable,
                 ResponseSize = 314159,
                 Payload = CreateZerosPayload(271828)
             };
             var response = client.UnaryCall(request);
 
-            Assert.AreEqual(PayloadType.Compressable, response.Payload.Type);
             Assert.AreEqual(314159, response.Payload.Body.Length);
             Console.WriteLine("Passed!");
         }
@@ -275,17 +273,12 @@ namespace Grpc.IntegrationTesting
 
             var request = new StreamingOutputCallRequest
             {
-                ResponseType = PayloadType.Compressable,
                 ResponseParameters = { bodySizes.Select((size) => new ResponseParameters { Size = size }) }
             };
 
             using (var call = client.StreamingOutputCall(request))
             {
                 var responseList = await call.ResponseStream.ToListAsync();
-                foreach (var res in responseList)
-                {
-                    Assert.AreEqual(PayloadType.Compressable, res.Payload.Type);
-                }
                 CollectionAssert.AreEqual(bodySizes, responseList.Select((item) => item.Payload.Body.Length));
             }
             Console.WriteLine("Passed!");
@@ -299,46 +292,38 @@ namespace Grpc.IntegrationTesting
             {
                 await call.RequestStream.WriteAsync(new StreamingOutputCallRequest
                 {
-                    ResponseType = PayloadType.Compressable,
                     ResponseParameters = { new ResponseParameters { Size = 31415 } },
                     Payload = CreateZerosPayload(27182)
                 });
 
                 Assert.IsTrue(await call.ResponseStream.MoveNext());
-                Assert.AreEqual(PayloadType.Compressable, call.ResponseStream.Current.Payload.Type);
                 Assert.AreEqual(31415, call.ResponseStream.Current.Payload.Body.Length);
 
                 await call.RequestStream.WriteAsync(new StreamingOutputCallRequest
                 {
-                    ResponseType = PayloadType.Compressable,
                     ResponseParameters = { new ResponseParameters { Size = 9 } },
                     Payload = CreateZerosPayload(8)
                 });
 
                 Assert.IsTrue(await call.ResponseStream.MoveNext());
-                Assert.AreEqual(PayloadType.Compressable, call.ResponseStream.Current.Payload.Type);
                 Assert.AreEqual(9, call.ResponseStream.Current.Payload.Body.Length);
 
                 await call.RequestStream.WriteAsync(new StreamingOutputCallRequest
                 {
-                    ResponseType = PayloadType.Compressable,
                     ResponseParameters = { new ResponseParameters { Size = 2653 } },
                     Payload = CreateZerosPayload(1828)
                 });
 
                 Assert.IsTrue(await call.ResponseStream.MoveNext());
-                Assert.AreEqual(PayloadType.Compressable, call.ResponseStream.Current.Payload.Type);
                 Assert.AreEqual(2653, call.ResponseStream.Current.Payload.Body.Length);
 
                 await call.RequestStream.WriteAsync(new StreamingOutputCallRequest
                 {
-                    ResponseType = PayloadType.Compressable,
                     ResponseParameters = { new ResponseParameters { Size = 58979 } },
                     Payload = CreateZerosPayload(45904)
                 });
 
                 Assert.IsTrue(await call.ResponseStream.MoveNext());
-                Assert.AreEqual(PayloadType.Compressable, call.ResponseStream.Current.Payload.Type);
                 Assert.AreEqual(58979, call.ResponseStream.Current.Payload.Body.Length);
 
                 await call.RequestStream.CompleteAsync();
@@ -367,7 +352,6 @@ namespace Grpc.IntegrationTesting
 
             var request = new SimpleRequest
             {
-                ResponseType = PayloadType.Compressable,
                 ResponseSize = 314159,
                 Payload = CreateZerosPayload(271828),
                 FillUsername = true,
@@ -377,7 +361,6 @@ namespace Grpc.IntegrationTesting
             // not setting credentials here because they were set on channel already
             var response = client.UnaryCall(request);
 
-            Assert.AreEqual(PayloadType.Compressable, response.Payload.Type);
             Assert.AreEqual(314159, response.Payload.Body.Length);
             Assert.False(string.IsNullOrEmpty(response.OauthScope));
             Assert.True(oauthScope.Contains(response.OauthScope));
@@ -391,7 +374,6 @@ namespace Grpc.IntegrationTesting
            
             var request = new SimpleRequest
             {
-                ResponseType = PayloadType.Compressable,
                 ResponseSize = 314159,
                 Payload = CreateZerosPayload(271828),
                 FillUsername = true,
@@ -400,7 +382,6 @@ namespace Grpc.IntegrationTesting
             // not setting credentials here because they were set on channel already
             var response = client.UnaryCall(request);
 
-            Assert.AreEqual(PayloadType.Compressable, response.Payload.Type);
             Assert.AreEqual(314159, response.Payload.Body.Length);
             Assert.AreEqual(GetEmailFromServiceAccountFile(), response.Username);
             Console.WriteLine("Passed!");
@@ -480,13 +461,11 @@ namespace Grpc.IntegrationTesting
             {
                 await call.RequestStream.WriteAsync(new StreamingOutputCallRequest
                 {
-                    ResponseType = PayloadType.Compressable,
                     ResponseParameters = { new ResponseParameters { Size = 31415 } },
                     Payload = CreateZerosPayload(27182)
                 });
 
                 Assert.IsTrue(await call.ResponseStream.MoveNext());
-                Assert.AreEqual(PayloadType.Compressable, call.ResponseStream.Current.Payload.Type);
                 Assert.AreEqual(31415, call.ResponseStream.Current.Payload.Body.Length);
 
                 cts.Cancel();
@@ -546,7 +525,6 @@ namespace Grpc.IntegrationTesting
                 // step 1: test unary call
                 var request = new SimpleRequest
                 {
-                    ResponseType = PayloadType.Compressable,
                     ResponseSize = 314159,
                     Payload = CreateZerosPayload(271828)
                 };
@@ -565,7 +543,6 @@ namespace Grpc.IntegrationTesting
                 // step 2: test full duplex call
                 var request = new StreamingOutputCallRequest
                 {
-                    ResponseType = PayloadType.Compressable,
                     ResponseParameters = { new ResponseParameters { Size = 31415 } },
                     Payload = CreateZerosPayload(27182)
                 };

From a7daf1edc2b336908918589c4de632197ebb92dc Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Tue, 21 Jun 2016 19:11:49 -0700
Subject: [PATCH 162/280] implement C# client compression interop tests

---
 .../Grpc.IntegrationTesting/InteropClient.cs  | 108 ++++++++++++++++++
 1 file changed, 108 insertions(+)

diff --git a/src/csharp/Grpc.IntegrationTesting/InteropClient.cs b/src/csharp/Grpc.IntegrationTesting/InteropClient.cs
index 834c276c64d..17ef587d168 100644
--- a/src/csharp/Grpc.IntegrationTesting/InteropClient.cs
+++ b/src/csharp/Grpc.IntegrationTesting/InteropClient.cs
@@ -222,6 +222,12 @@ namespace Grpc.IntegrationTesting
                 case "unimplemented_method":
                     RunUnimplementedMethod(new UnimplementedService.UnimplementedServiceClient(channel));
                     break;
+                case "client_compressed_unary":
+                    RunClientCompressedUnary(client);
+                    break;
+                case "client_compressed_streaming":
+                    await RunClientCompressedStreamingAsync(client);
+                    break;
                 default:
                     throw new ArgumentException("Unknown test case " + options.TestCase);
             }
@@ -615,11 +621,113 @@ namespace Grpc.IntegrationTesting
             Console.WriteLine("Passed!");
         }
 
+        public static void RunClientCompressedUnary(TestService.TestServiceClient client)
+        {
+            Console.WriteLine("running client_compressed_unary");
+            var probeRequest = new SimpleRequest
+            {
+                ExpectCompressed = new BoolValue
+                {
+                    Value = true  // lie about compression
+                },
+                ResponseSize = 314159,
+                Payload = CreateZerosPayload(271828)
+            };
+            var e = Assert.Throws<RpcException>(() => client.UnaryCall(probeRequest, CreateClientCompressionMetadata(false)));
+            Assert.AreEqual(StatusCode.InvalidArgument, e.Status.StatusCode);
+
+            var compressedRequest = new SimpleRequest
+            {
+                ExpectCompressed = new BoolValue
+                {
+                    Value = true
+                },
+                ResponseSize = 314159,
+                Payload = CreateZerosPayload(271828)
+            };
+            var response1 = client.UnaryCall(compressedRequest, CreateClientCompressionMetadata(true));
+            Assert.AreEqual(314159, response1.Payload.Body.Length);
+
+            var uncompressedRequest = new SimpleRequest
+            {
+                ExpectCompressed = new BoolValue
+                {
+                    Value = false
+                },
+                ResponseSize = 314159,
+                Payload = CreateZerosPayload(271828)
+            };
+            var response2 = client.UnaryCall(uncompressedRequest, CreateClientCompressionMetadata(false));
+            Assert.AreEqual(314159, response2.Payload.Body.Length);
+
+            Console.WriteLine("Passed!");
+        }
+
+        public static async Task RunClientCompressedStreamingAsync(TestService.TestServiceClient client)
+        {
+            Console.WriteLine("running client_compressed_streaming");
+            try
+            {
+                var probeCall = client.StreamingInputCall(CreateClientCompressionMetadata(false));
+                await probeCall.RequestStream.WriteAsync(new StreamingInputCallRequest
+                {
+                    ExpectCompressed = new BoolValue
+                    {
+                        Value = true
+                    },
+                    Payload = CreateZerosPayload(27182)
+                });
+
+                // cannot use Assert.ThrowsAsync because it uses Task.Wait and would deadlock.
+                await probeCall;
+                Assert.Fail();
+            }
+            catch (RpcException e)
+            {
+                Assert.AreEqual(StatusCode.InvalidArgument, e.Status.StatusCode);
+            }
+
+            var call = client.StreamingInputCall(CreateClientCompressionMetadata(true));
+            await call.RequestStream.WriteAsync(new StreamingInputCallRequest
+            {
+                ExpectCompressed = new BoolValue
+                {
+                    Value = true
+                },
+                Payload = CreateZerosPayload(27182)
+            });
+
+            call.RequestStream.WriteOptions = new WriteOptions(WriteFlags.NoCompress);
+            await call.RequestStream.WriteAsync(new StreamingInputCallRequest
+            {
+                ExpectCompressed = new BoolValue
+                {
+                    Value = false
+                },
+                Payload = CreateZerosPayload(45904)
+            });
+            await call.RequestStream.CompleteAsync();
+
+            var response = await call.ResponseAsync;
+            Assert.AreEqual(73086, response.AggregatedPayloadSize);
+
+            Console.WriteLine("Passed!");
+        }
+
         private static Payload CreateZerosPayload(int size)
         {
             return new Payload { Body = ByteString.CopyFrom(new byte[size]) };
         }
 
+        private static Metadata CreateClientCompressionMetadata(bool compressed)
+        {
+            var algorithmName = compressed ? "gzip" : "identity";
+            return new Metadata
+            {
+                { new Metadata.Entry("grpc-internal-encoding-request", algorithmName) }
+            };
+        }
+
         // extracts the client_email field from service account file used for auth test cases
         private static string GetEmailFromServiceAccountFile()
         {

From 9fc079fddd2fc1bad958d6f7f7063363437426a5 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Tue, 21 Jun 2016 19:53:31 -0700
Subject: [PATCH 163/280] enable client compression interop tests for C#

---
 tools/run_tests/run_interop_tests.py | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/tools/run_tests/run_interop_tests.py b/tools/run_tests/run_interop_tests.py
index e3af721ee53..d76dd4b7d26 100755
--- a/tools/run_tests/run_interop_tests.py
+++ b/tools/run_tests/run_interop_tests.py
@@ -54,10 +54,13 @@ os.chdir(ROOT)
 
 _DEFAULT_SERVER_PORT=8080
 
-_SKIP_COMPRESSION = ['client_compressed_unary',
-                     'client_compressed_streaming',
-                     'server_compressed_unary',
-                     'server_compressed_streaming']
+_SKIP_CLIENT_COMPRESSION = ['client_compressed_unary',
+                            'client_compressed_streaming']
+
+_SKIP_SERVER_COMPRESSION = ['server_compressed_unary',
+                            'server_compressed_streaming']
+
+_SKIP_COMPRESSION = _SKIP_CLIENT_COMPRESSION + _SKIP_SERVER_COMPRESSION
 
 _SKIP_ADVANCED = ['custom_metadata', 'status_code_and_message',
                   'unimplemented_method']
@@ -113,7 +116,7 @@ class CSharpLanguage:
     return {}
 
   def unimplemented_test_cases(self):
-    return _SKIP_COMPRESSION
+    return _SKIP_SERVER_COMPRESSION
 
   def unimplemented_test_cases_server(self):
     return _SKIP_COMPRESSION

From 606e35a4fb2a6e7dd711e7a2eec6c59bf6f2258b Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Wed, 22 Jun 2016 12:26:36 -0700
Subject: [PATCH 164/280] add C# constant for
 GRPC_COMPRESSION_REQUEST_ALGORITHM_MD_KEY

---
 src/csharp/Grpc.Core.Tests/CompressionTest.cs       | 2 +-
 src/csharp/Grpc.Core/Metadata.cs                    | 7 +++++++
 src/csharp/Grpc.IntegrationTesting/InteropClient.cs | 2 +-
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/csharp/Grpc.Core.Tests/CompressionTest.cs b/src/csharp/Grpc.Core.Tests/CompressionTest.cs
index f2f2931e480..16be210508a 100644
--- a/src/csharp/Grpc.Core.Tests/CompressionTest.cs
+++ b/src/csharp/Grpc.Core.Tests/CompressionTest.cs
@@ -125,7 +125,7 @@ namespace Grpc.Core.Tests
         {
             var compressionMetadata = new Metadata
             {
-                { new Metadata.Entry("grpc-internal-encoding-request", "gzip") }
+                { new Metadata.Entry(Metadata.CompressionRequestAlgorithmMetadataKey, "gzip") }
             };
 
             helper.UnaryHandler = new UnaryServerMethod<string, string>(async (req, context) =>
diff --git a/src/csharp/Grpc.Core/Metadata.cs b/src/csharp/Grpc.Core/Metadata.cs
index f73f720094a..915bec146c9 100644
--- a/src/csharp/Grpc.Core/Metadata.cs
+++ b/src/csharp/Grpc.Core/Metadata.cs
@@ -63,6 +63,13 @@ namespace Grpc.Core
         /// </summary>
         public static readonly Metadata Empty = new Metadata().Freeze();
 
+        /// <summary>
+        /// To be used in initial metadata to request specific compression algorithm
+        /// for given call. Direct selection of compression algorithms is an internal
+        /// feature and is not part of public API.
+        /// </summary>
+        internal const string CompressionRequestAlgorithmMetadataKey = "grpc-internal-encoding-request";
+
         readonly List<Entry> entries;
         bool readOnly;
 
diff --git a/src/csharp/Grpc.IntegrationTesting/InteropClient.cs b/src/csharp/Grpc.IntegrationTesting/InteropClient.cs
index 17ef587d168..e27fe5b3d80 100644
--- a/src/csharp/Grpc.IntegrationTesting/InteropClient.cs
+++ b/src/csharp/Grpc.IntegrationTesting/InteropClient.cs
@@ -724,7 +724,7 @@ namespace Grpc.IntegrationTesting
             var algorithmName = compressed ? "gzip" : "identity";
             return new Metadata
             {
-                { new Metadata.Entry("grpc-internal-encoding-request", algorithmName) }
+                { new Metadata.Entry(Metadata.CompressionRequestAlgorithmMetadataKey, algorithmName) }
             };
         }
 

From b16e4518b765f82b9b65222bd56738cda44e7259 Mon Sep 17 00:00:00 2001
From: Nathaniel Manista <nathaniel@google.com>
Date: Tue, 21 Jun 2016 23:24:06 +0000
Subject: [PATCH 165/280] Add a test of metadata, status code, and details

---
 src/python/grpcio/tests/tests.json            |   1 +
 .../tests/unit/_metadata_code_details_test.py | 523 ++++++++++++++++++
 2 files changed, 524 insertions(+)
 create mode 100644 src/python/grpcio/tests/unit/_metadata_code_details_test.py

diff --git a/src/python/grpcio/tests/tests.json b/src/python/grpcio/tests/tests.json
index 8e509621a84..e384a2fc135 100644
--- a/src/python/grpcio/tests/tests.json
+++ b/src/python/grpcio/tests/tests.json
@@ -24,6 +24,7 @@
   "_implementations_test.ChannelCredentialsTest", 
   "_insecure_interop_test.InsecureInteropTest", 
   "_logging_pool_test.LoggingPoolTest", 
+  "_metadata_code_details_test.MetadataCodeDetailsTest",
   "_metadata_test.MetadataTest",
   "_not_found_test.NotFoundTest", 
   "_python_plugin_test.PythonPluginTest",
diff --git a/src/python/grpcio/tests/unit/_metadata_code_details_test.py b/src/python/grpcio/tests/unit/_metadata_code_details_test.py
new file mode 100644
index 00000000000..dd74268cbf1
--- /dev/null
+++ b/src/python/grpcio/tests/unit/_metadata_code_details_test.py
@@ -0,0 +1,523 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Tests application-provided metadata, status code, and details."""
+
+import threading
+import unittest
+
+import grpc
+from grpc.framework.foundation import logging_pool
+
+from tests.unit import test_common
+from tests.unit.framework.common import test_constants
+from tests.unit.framework.common import test_control
+
+_SERIALIZED_REQUEST = b'\x46\x47\x48'
+_SERIALIZED_RESPONSE = b'\x49\x50\x51'
+
+_REQUEST_SERIALIZER = lambda unused_request: _SERIALIZED_REQUEST
+_REQUEST_DESERIALIZER = lambda unused_serialized_request: object()
+_RESPONSE_SERIALIZER = lambda unused_response: _SERIALIZED_RESPONSE
+_RESPONSE_DESERIALIZER = lambda unused_serialized_resopnse: object()
+
+_SERVICE = b'test.TestService'
+_UNARY_UNARY = b'UnaryUnary'
+_UNARY_STREAM = b'UnaryStream'
+_STREAM_UNARY = b'StreamUnary'
+_STREAM_STREAM = b'StreamStream'
+
+_CLIENT_METADATA = (
+    (b'client-md-key', b'client-md-key'),
+    (b'client-md-key-bin', b'\x00\x01')
+)
+
+_SERVER_INITIAL_METADATA = (
+    (b'server-initial-md-key', b'server-initial-md-value'),
+    (b'server-initial-md-key-bin', b'\x00\x02')
+)
+
+_SERVER_TRAILING_METADATA = (
+    (b'server-trailing-md-key', b'server-trailing-md-value'),
+    (b'server-trailing-md-key-bin', b'\x00\x03')
+)
+
+_NON_OK_CODE = grpc.StatusCode.NOT_FOUND
+_DETAILS = b'Test details!'
+
+
+class _Servicer(object):
+
+  def __init__(self):
+    self._lock = threading.Lock()
+    self._code = None
+    self._details = None
+    self._exception = False
+    self._return_none = False
+    self._received_client_metadata = None
+
+  def unary_unary(self, request, context):
+    with self._lock:
+      self._received_client_metadata = context.invocation_metadata()
+      context.send_initial_metadata(_SERVER_INITIAL_METADATA)
+      context.set_trailing_metadata(_SERVER_TRAILING_METADATA)
+      if self._code is not None:
+        context.set_code(self._code)
+      if self._details is not None:
+        context.set_details(self._details)
+      if self._exception:
+        raise test_control.Defect()
+      else:
+        return None if self._return_none else object()
+
+  def unary_stream(self, request, context):
+    with self._lock:
+      self._received_client_metadata = context.invocation_metadata()
+      context.send_initial_metadata(_SERVER_INITIAL_METADATA)
+      context.set_trailing_metadata(_SERVER_TRAILING_METADATA)
+      if self._code is not None:
+        context.set_code(self._code)
+      if self._details is not None:
+        context.set_details(self._details)
+      for _ in range(test_constants.STREAM_LENGTH // 2):
+        yield _SERIALIZED_RESPONSE
+      if self._exception:
+        raise test_control.Defect()
+
+  def stream_unary(self, request_iterator, context):
+    with self._lock:
+      self._received_client_metadata = context.invocation_metadata()
+      context.send_initial_metadata(_SERVER_INITIAL_METADATA)
+      context.set_trailing_metadata(_SERVER_TRAILING_METADATA)
+      if self._code is not None:
+        context.set_code(self._code)
+      if self._details is not None:
+        context.set_details(self._details)
+      # TODO(https://github.com/grpc/grpc/issues/6891): just ignore the
+      # request iterator.
+      for ignored_request in request_iterator:
+        pass
+      if self._exception:
+        raise test_control.Defect()
+      else:
+        return None if self._return_none else _SERIALIZED_RESPONSE
+
+  def stream_stream(self, request_iterator, context):
+    with self._lock:
+      self._received_client_metadata = context.invocation_metadata()
+      context.send_initial_metadata(_SERVER_INITIAL_METADATA)
+      context.set_trailing_metadata(_SERVER_TRAILING_METADATA)
+      if self._code is not None:
+        context.set_code(self._code)
+      if self._details is not None:
+        context.set_details(self._details)
+      # TODO(https://github.com/grpc/grpc/issues/6891): just ignore the
+      # request iterator.
+      for ignored_request in request_iterator:
+        pass
+      for _ in range(test_constants.STREAM_LENGTH // 3):
+        yield object()
+      if self._exception:
+        raise test_control.Defect()
+
+  def set_code(self, code):
+    with self._lock:
+      self._code = code
+
+  def set_details(self, details):
+    with self._lock:
+      self._details = details
+
+  def set_exception(self):
+    with self._lock:
+      self._exception = True
+
+  def set_return_none(self):
+    with self._lock:
+      self._return_none = True
+
+  def received_client_metadata(self):
+    with self._lock:
+      return self._received_client_metadata
+
+
+def _generic_handler(servicer):
+  method_handlers = {
+      _UNARY_UNARY: grpc.unary_unary_rpc_method_handler(
+          servicer.unary_unary, request_deserializer=_REQUEST_DESERIALIZER,
+          response_serializer=_RESPONSE_SERIALIZER),
+      _UNARY_STREAM: grpc.unary_stream_rpc_method_handler(
+          servicer.unary_stream),
+      _STREAM_UNARY: grpc.stream_unary_rpc_method_handler(
+          servicer.stream_unary),
+      _STREAM_STREAM: grpc.stream_stream_rpc_method_handler(
+          servicer.stream_stream, request_deserializer=_REQUEST_DESERIALIZER,
+          response_serializer=_RESPONSE_SERIALIZER),
+  }
+  return grpc.method_handlers_generic_handler(_SERVICE, method_handlers)
+
+
+class MetadataCodeDetailsTest(unittest.TestCase):
+
+  def setUp(self):
+    self._servicer = _Servicer()
+    self._server_pool = logging_pool.pool(test_constants.THREAD_CONCURRENCY)
+    self._server = grpc.server(
+        (_generic_handler(self._servicer),), self._server_pool)
+    port = self._server.add_insecure_port('[::]:0')
+    self._server.start()
+
+    channel = grpc.insecure_channel('localhost:{}'.format(port))
+    self._unary_unary = channel.unary_unary(
+        b'/'.join((b'', _SERVICE, _UNARY_UNARY,)),
+        request_serializer=_REQUEST_SERIALIZER,
+        response_deserializer=_RESPONSE_DESERIALIZER,)
+    self._unary_stream = channel.unary_stream(
+        b'/'.join((b'', _SERVICE, _UNARY_STREAM,)),)
+    self._stream_unary = channel.stream_unary(
+        b'/'.join((b'', _SERVICE, _STREAM_UNARY,)),)
+    self._stream_stream = channel.stream_stream(
+        b'/'.join((b'', _SERVICE, _STREAM_STREAM,)),
+        request_serializer=_REQUEST_SERIALIZER,
+        response_deserializer=_RESPONSE_DESERIALIZER,)
+
+
+  def testSuccessfulUnaryUnary(self):
+    self._servicer.set_details(_DETAILS)
+
+    unused_response, call = self._unary_unary.with_call(
+        object(), metadata=_CLIENT_METADATA)
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA, call.initial_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA, call.trailing_metadata()))
+    self.assertIs(grpc.StatusCode.OK, call.code())
+    self.assertEqual(_DETAILS, call.details())
+
+  def testSuccessfulUnaryStream(self):
+    self._servicer.set_details(_DETAILS)
+
+    call = self._unary_stream(_SERIALIZED_REQUEST, metadata=_CLIENT_METADATA)
+    received_initial_metadata = call.initial_metadata()
+    for _ in call:
+      pass
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA, received_initial_metadata))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA, call.trailing_metadata()))
+    self.assertIs(grpc.StatusCode.OK, call.code())
+    self.assertEqual(_DETAILS, call.details())
+
+  def testSuccessfulStreamUnary(self):
+    self._servicer.set_details(_DETAILS)
+
+    unused_response, call = self._stream_unary.with_call(
+        iter([_SERIALIZED_REQUEST] * test_constants.STREAM_LENGTH),
+        metadata=_CLIENT_METADATA)
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA, call.initial_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA, call.trailing_metadata()))
+    self.assertIs(grpc.StatusCode.OK, call.code())
+    self.assertEqual(_DETAILS, call.details())
+
+  def testSuccessfulStreamStream(self):
+    self._servicer.set_details(_DETAILS)
+
+    call = self._stream_stream(
+        iter([object()] * test_constants.STREAM_LENGTH),
+        metadata=_CLIENT_METADATA)
+    received_initial_metadata = call.initial_metadata()
+    for _ in call:
+      pass
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA, received_initial_metadata))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA, call.trailing_metadata()))
+    self.assertIs(grpc.StatusCode.OK, call.code())
+    self.assertEqual(_DETAILS, call.details())
+
+  def testCustomCodeUnaryUnary(self):
+    self._servicer.set_code(_NON_OK_CODE)
+    self._servicer.set_details(_DETAILS)
+
+    with self.assertRaises(grpc.RpcError) as exception_context:
+      self._unary_unary.with_call(object(), metadata=_CLIENT_METADATA)
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA,
+            exception_context.exception.initial_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA,
+            exception_context.exception.trailing_metadata()))
+    self.assertIs(_NON_OK_CODE, exception_context.exception.code())
+    self.assertEqual(_DETAILS, exception_context.exception.details())
+
+  def testCustomCodeUnaryStream(self):
+    self._servicer.set_code(_NON_OK_CODE)
+    self._servicer.set_details(_DETAILS)
+
+    call = self._unary_stream(_SERIALIZED_REQUEST, metadata=_CLIENT_METADATA)
+    received_initial_metadata = call.initial_metadata()
+    with self.assertRaises(grpc.RpcError):
+      for _ in call:
+        pass
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA, received_initial_metadata))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA, call.trailing_metadata()))
+    self.assertIs(_NON_OK_CODE, call.code())
+    self.assertEqual(_DETAILS, call.details())
+
+  def testCustomCodeStreamUnary(self):
+    self._servicer.set_code(_NON_OK_CODE)
+    self._servicer.set_details(_DETAILS)
+
+    with self.assertRaises(grpc.RpcError) as exception_context:
+      self._stream_unary.with_call(
+          iter([_SERIALIZED_REQUEST] * test_constants.STREAM_LENGTH),
+          metadata=_CLIENT_METADATA)
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+          _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+          _SERVER_INITIAL_METADATA,
+          exception_context.exception.initial_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+          _SERVER_TRAILING_METADATA,
+          exception_context.exception.trailing_metadata()))
+    self.assertIs(_NON_OK_CODE, exception_context.exception.code())
+    self.assertEqual(_DETAILS, exception_context.exception.details())
+
+  def testCustomCodeStreamStream(self):
+    self._servicer.set_code(_NON_OK_CODE)
+    self._servicer.set_details(_DETAILS)
+
+    call = self._stream_stream(
+        iter([object()] * test_constants.STREAM_LENGTH),
+        metadata=_CLIENT_METADATA)
+    received_initial_metadata = call.initial_metadata()
+    with self.assertRaises(grpc.RpcError) as exception_context:
+      for _ in call:
+        pass
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+          _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA, received_initial_metadata))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA,
+            exception_context.exception.trailing_metadata()))
+    self.assertIs(_NON_OK_CODE, exception_context.exception.code())
+    self.assertEqual(_DETAILS, exception_context.exception.details())
+
+  def testCustomCodeExceptionUnaryUnary(self):
+    self._servicer.set_code(_NON_OK_CODE)
+    self._servicer.set_details(_DETAILS)
+    self._servicer.set_exception()
+
+    with self.assertRaises(grpc.RpcError) as exception_context:
+     self._unary_unary.with_call(object(), metadata=_CLIENT_METADATA)
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA,
+            exception_context.exception.initial_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA,
+            exception_context.exception.trailing_metadata()))
+    self.assertIs(_NON_OK_CODE, exception_context.exception.code())
+    self.assertEqual(_DETAILS, exception_context.exception.details())
+
+  def testCustomCodeExceptionUnaryStream(self):
+    self._servicer.set_code(_NON_OK_CODE)
+    self._servicer.set_details(_DETAILS)
+    self._servicer.set_exception()
+
+    call = self._unary_stream(_SERIALIZED_REQUEST, metadata=_CLIENT_METADATA)
+    received_initial_metadata = call.initial_metadata()
+    with self.assertRaises(grpc.RpcError):
+      for _ in call:
+        pass
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA, received_initial_metadata))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA, call.trailing_metadata()))
+    self.assertIs(_NON_OK_CODE, call.code())
+    self.assertEqual(_DETAILS, call.details())
+
+  def testCustomCodeExceptionStreamUnary(self):
+    self._servicer.set_code(_NON_OK_CODE)
+    self._servicer.set_details(_DETAILS)
+    self._servicer.set_exception()
+
+    with self.assertRaises(grpc.RpcError) as exception_context:
+      self._stream_unary.with_call(
+          iter([_SERIALIZED_REQUEST] * test_constants.STREAM_LENGTH),
+          metadata=_CLIENT_METADATA)
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA,
+            exception_context.exception.initial_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA,
+            exception_context.exception.trailing_metadata()))
+    self.assertIs(_NON_OK_CODE, exception_context.exception.code())
+    self.assertEqual(_DETAILS, exception_context.exception.details())
+
+  def testCustomCodeExceptionStreamStream(self):
+    self._servicer.set_code(_NON_OK_CODE)
+    self._servicer.set_details(_DETAILS)
+    self._servicer.set_exception()
+
+    call = self._stream_stream(
+        iter([object()] * test_constants.STREAM_LENGTH),
+        metadata=_CLIENT_METADATA)
+    received_initial_metadata = call.initial_metadata()
+    with self.assertRaises(grpc.RpcError):
+      for _ in call:
+        pass
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA, received_initial_metadata))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA, call.trailing_metadata()))
+    self.assertIs(_NON_OK_CODE, call.code())
+    self.assertEqual(_DETAILS, call.details())
+
+  def testCustomCodeReturnNoneUnaryUnary(self):
+    self._servicer.set_code(_NON_OK_CODE)
+    self._servicer.set_details(_DETAILS)
+    self._servicer.set_return_none()
+
+    with self.assertRaises(grpc.RpcError) as exception_context:
+      self._unary_unary.with_call(object(), metadata=_CLIENT_METADATA)
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA,
+            exception_context.exception.initial_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA,
+            exception_context.exception.trailing_metadata()))
+    self.assertIs(_NON_OK_CODE, exception_context.exception.code())
+    self.assertEqual(_DETAILS, exception_context.exception.details())
+
+  def testCustomCodeReturnNoneStreamUnary(self):
+    self._servicer.set_code(_NON_OK_CODE)
+    self._servicer.set_details(_DETAILS)
+    self._servicer.set_return_none()
+
+    with self.assertRaises(grpc.RpcError) as exception_context:
+      self._stream_unary.with_call(
+          iter([_SERIALIZED_REQUEST] * test_constants.STREAM_LENGTH),
+          metadata=_CLIENT_METADATA)
+
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _CLIENT_METADATA, self._servicer.received_client_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_INITIAL_METADATA,
+            exception_context.exception.initial_metadata()))
+    self.assertTrue(
+        test_common.metadata_transmitted(
+            _SERVER_TRAILING_METADATA,
+            exception_context.exception.trailing_metadata()))
+    self.assertIs(_NON_OK_CODE, exception_context.exception.code())
+    self.assertEqual(_DETAILS, exception_context.exception.details())
+
+
+if __name__ == '__main__':
+  unittest.main(verbosity=2)

From edfebc909a7e4a2ada5e07d2012a227fb15d4064 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Tue, 21 Jun 2016 16:39:21 -0700
Subject: [PATCH 166/280] dont generate NewClient method for C# services

---
 src/compiler/csharp_generator.cc | 15 ---------------
 1 file changed, 15 deletions(-)

diff --git a/src/compiler/csharp_generator.cc b/src/compiler/csharp_generator.cc
index fc8feaf0fcc..8c1c6f2c826 100644
--- a/src/compiler/csharp_generator.cc
+++ b/src/compiler/csharp_generator.cc
@@ -485,20 +485,6 @@ void GenerateBindServiceMethod(Printer* out, const ServiceDescriptor *service) {
   out->Print("\n");
 }
 
-void GenerateNewStubMethods(Printer* out, const ServiceDescriptor *service) {
-  out->Print("/// <summary>Creates a new client for $servicename$</summary>\n",
-             "servicename", GetServiceClassName(service));
-  out->Print("public static $classname$ NewClient(Channel channel)\n",
-             "classname", GetClientClassName(service));
-  out->Print("{\n");
-  out->Indent();
-  out->Print("return new $classname$(channel);\n", "classname",
-             GetClientClassName(service));
-  out->Outdent();
-  out->Print("}\n");
-  out->Print("\n");
-}
-
 void GenerateService(Printer* out, const ServiceDescriptor *service,
                      bool generate_client, bool generate_server,
                      bool internal_access) {
@@ -524,7 +510,6 @@ void GenerateService(Printer* out, const ServiceDescriptor *service,
   }
   if (generate_client) {
     GenerateClientStub(out, service);
-    GenerateNewStubMethods(out, service);
   }
   if (generate_server) {
     GenerateBindServiceMethod(out, service);

From 614944324246b2b4eef9fc2e989af20375c49cd5 Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@makarand-linux.mtv.corp.google.com>
Date: Wed, 22 Jun 2016 13:34:59 -0700
Subject: [PATCH 167/280] add code to unregister endpoints

---
 src/core/lib/iomgr/network_status_tracker.c | 46 ++++++++++++++++++++-
 src/core/lib/iomgr/network_status_tracker.h |  1 +
 src/core/lib/iomgr/tcp_posix.c              |  1 +
 src/core/lib/iomgr/tcp_windows.c            |  1 +
 4 files changed, 47 insertions(+), 2 deletions(-)

diff --git a/src/core/lib/iomgr/network_status_tracker.c b/src/core/lib/iomgr/network_status_tracker.c
index 6e432368cf1..f4f8e97a252 100644
--- a/src/core/lib/iomgr/network_status_tracker.c
+++ b/src/core/lib/iomgr/network_status_tracker.c
@@ -33,6 +33,7 @@
 
 #include "src/core/lib/iomgr/endpoint.h"
 #include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
 
 typedef struct endpoint_ll_node {
   grpc_endpoint *ep;
@@ -40,9 +41,13 @@ typedef struct endpoint_ll_node {
 } endpoint_ll_node;
 
 static endpoint_ll_node *head = NULL;
+static gpr_mu g_endpoint_mutex;
+static bool g_init_done = false;
 
-// TODO(makarandd): Install callback with OS to monitor network status.
 void grpc_initialize_network_status_monitor() {
+  g_init_done = true;
+  gpr_mu_init(&g_endpoint_mutex);
+  // TODO(makarandd): Install callback with OS to monitor network status.
 }
 
 void grpc_destroy_network_status_monitor() {
@@ -51,9 +56,15 @@ void grpc_destroy_network_status_monitor() {
     gpr_free(curr);
     curr = next;
   }
+  gpr_mu_destroy(&g_endpoint_mutex);
 }
 
 void grpc_network_status_register_endpoint(grpc_endpoint *ep) {
+  if (!g_init_done) {
+    grpc_initialize_network_status_monitor();
+  }
+  gpr_mu_lock(&g_endpoint_mutex);
+  gpr_log(GPR_DEBUG, "Register endpoint %p", ep);
   if (head == NULL) {
     head = (endpoint_ll_node *)gpr_malloc(sizeof(endpoint_ll_node));
     head->ep = ep;
@@ -64,19 +75,50 @@ void grpc_network_status_register_endpoint(grpc_endpoint *ep) {
     head->ep = ep;
     head->next = prev_head;
   }
+  gpr_mu_unlock(&g_endpoint_mutex);
+}
+
+void grpc_network_status_unregister_endpoint(grpc_endpoint *ep) {
+  gpr_mu_lock(&g_endpoint_mutex);
+  GPR_ASSERT(head);
+  gpr_log(GPR_DEBUG, "Unregister endpoint %p", ep);
+  bool found = false;
+  endpoint_ll_node *prev = head;
+  // if we're unregistering the head, just move head to the next
+  if (ep == head->ep) {
+      head = head->next;
+      gpr_free(prev);
+      found = true;
+  } else {
+    for (endpoint_ll_node *curr = head->next; curr != NULL; curr = curr->next) {
+      if (ep == curr->ep) {
+        prev->next = curr->next;
+        gpr_free(curr);
+        found = true;
+        break;
+      }
+      prev = curr;
+    }
+  }
+  gpr_mu_unlock(&g_endpoint_mutex);
+  GPR_ASSERT(found);
 }
 
 // Walk the linked-list from head and execute shutdown. It is possible that
 // other threads might be in the process of shutdown as well, but that has
-// no side effect.
+// no side effect since endpoint shutdown is idempotent.
 void grpc_network_status_shutdown_all_endpoints() {
+  gpr_mu_lock(&g_endpoint_mutex);
   if (head == NULL) {
+    gpr_mu_unlock(&g_endpoint_mutex);
     return;
   }
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 
   for (endpoint_ll_node *curr = head; curr != NULL; curr = curr->next) {
+    gpr_log(GPR_DEBUG, "Shutting down endpoint %p", curr->ep);
     curr->ep->vtable->shutdown(&exec_ctx, curr->ep);
   }
+  gpr_mu_unlock(&g_endpoint_mutex);
   grpc_exec_ctx_finish(&exec_ctx);
 }
diff --git a/src/core/lib/iomgr/network_status_tracker.h b/src/core/lib/iomgr/network_status_tracker.h
index 4154151927f..74a1aa8135f 100644
--- a/src/core/lib/iomgr/network_status_tracker.h
+++ b/src/core/lib/iomgr/network_status_tracker.h
@@ -36,5 +36,6 @@
 #include "src/core/lib/iomgr/endpoint.h"
 
 void grpc_network_status_register_endpoint(grpc_endpoint *ep);
+void grpc_network_status_unregister_endpoint(grpc_endpoint *ep);
 void grpc_network_status_shutdown_all_endpoints();
 #endif /* GRPC_CORE_LIB_IOMGR_NETWORK_STATUS_TRACKER_H */
diff --git a/src/core/lib/iomgr/tcp_posix.c b/src/core/lib/iomgr/tcp_posix.c
index f7818353b0a..56c1eef024c 100644
--- a/src/core/lib/iomgr/tcp_posix.c
+++ b/src/core/lib/iomgr/tcp_posix.c
@@ -153,6 +153,7 @@ static void tcp_ref(grpc_tcp *tcp) { gpr_ref(&tcp->refcount); }
 #endif
 
 static void tcp_destroy(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
+  grpc_network_status_unregister_endpoint(ep);
   grpc_tcp *tcp = (grpc_tcp *)ep;
   TCP_UNREF(exec_ctx, tcp, "destroy");
 }
diff --git a/src/core/lib/iomgr/tcp_windows.c b/src/core/lib/iomgr/tcp_windows.c
index 8140d1d8cd2..37ab59021e3 100644
--- a/src/core/lib/iomgr/tcp_windows.c
+++ b/src/core/lib/iomgr/tcp_windows.c
@@ -379,6 +379,7 @@ static void win_shutdown(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
 }
 
 static void win_destroy(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep) {
+  grpc_network_status_unregister_endpoint(ep);
   grpc_tcp *tcp = (grpc_tcp *)ep;
   TCP_UNREF(tcp, "destroy");
 }

From 76a0795b73ad2632c435fc338bb49368d1d68d9f Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Wed, 22 Jun 2016 15:09:06 -0700
Subject: [PATCH 168/280] Fix build errors on some configurations

---
 src/core/lib/iomgr/ev_epoll_linux.c   | 13 +++++++------
 test/core/iomgr/ev_epoll_linux_test.c | 10 ++++++++--
 2 files changed, 15 insertions(+), 8 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 6464d3ba348..88cbc586349 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -34,6 +34,7 @@
 #include <grpc/grpc_posix.h>
 #include <grpc/support/port_platform.h>
 
+/* This polling engine is only relevant on linux kernels supporting epoll() */
 #ifdef GPR_LINUX_EPOLL
 
 #include "src/core/lib/iomgr/ev_epoll_linux.h"
@@ -322,7 +323,7 @@ static void polling_island_add_fds_locked(polling_island *pi, grpc_fd **fds,
 
 #ifdef GRPC_TSAN
   /* See the definition of g_epoll_sync for more context */
-  gpr_atm_rel_store(&g_epoll_sync, 0);
+  gpr_atm_rel_store(&g_epoll_sync, (gpr_atm) 0);
 #endif /* defined(GRPC_TSAN) */
 
   for (i = 0; i < fd_count; i++) {
@@ -442,8 +443,8 @@ static polling_island *polling_island_create(grpc_fd *initial_fd) {
     pi->fds = NULL;
   }
 
-  gpr_atm_rel_store(&pi->ref_count, 0);
-  gpr_atm_rel_store(&pi->merged_to, NULL);
+  gpr_atm_rel_store(&pi->ref_count, (gpr_atm) 0);
+  gpr_atm_rel_store(&pi->merged_to, (gpr_atm) NULL);
 
   pi->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
 
@@ -472,7 +473,7 @@ static polling_island *polling_island_create(grpc_fd *initial_fd) {
 static void polling_island_delete(polling_island *pi) {
   GPR_ASSERT(pi->fd_cnt == 0);
 
-  gpr_atm_rel_store(&pi->merged_to, NULL);
+  gpr_atm_rel_store(&pi->merged_to, (gpr_atm) NULL);
 
   close(pi->epoll_fd);
   pi->epoll_fd = -1;
@@ -648,7 +649,7 @@ static polling_island *polling_island_merge(polling_island *p,
   polling_island_add_wakeup_fd_locked(p, &polling_island_wakeup_fd);
 
   /* Add the 'merged_to' link from p --> q */
-  gpr_atm_rel_store(&p->merged_to, q);
+  gpr_atm_rel_store(&p->merged_to, (gpr_atm) q);
   PI_ADD_REF(q, "pi_merge"); /* To account for the new incoming ref from p */
 
   gpr_mu_unlock(&p->mu);
@@ -810,7 +811,7 @@ static grpc_fd *fd_create(int fd, const char *name) {
      holding a lock to it anyway. */
   gpr_mu_lock(&new_fd->mu);
 
-  gpr_atm_rel_store(&new_fd->refst, 1);
+  gpr_atm_rel_store(&new_fd->refst, (gpr_atm) 1);
   new_fd->fd = fd;
   new_fd->shutdown = false;
   new_fd->orphaned = false;
diff --git a/test/core/iomgr/ev_epoll_linux_test.c b/test/core/iomgr/ev_epoll_linux_test.c
index 35eb6791302..66a69f52cdb 100644
--- a/test/core/iomgr/ev_epoll_linux_test.c
+++ b/test/core/iomgr/ev_epoll_linux_test.c
@@ -30,7 +30,10 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  */
+#include <grpc/support/port_platform.h>
 
+/* This test only relevant on linux systems where epoll() is available */
+#ifdef GPR_LINUX_EPOLL
 #include "src/core/lib/iomgr/ev_epoll_linux.h"
 #include "src/core/lib/iomgr/ev_posix.h"
 
@@ -128,8 +131,10 @@ static void test_add_fd_to_pollset() {
   int i;
   int r;
 
-  /* Create some dummy file descriptors (using pipe fds for this test. Could be
-     anything). Also NUM_FDS should be even for this test. */
+  /* Create some dummy file descriptors. Currently using pipe file descriptors
+   * for this test but we could use any other type of file descriptors. Also,
+   * since pipe() used in this test creates two fds in each call, NUM_FDS should
+   * be an even number */
   for (i = 0; i < NUM_FDS; i = i + 2) {
     r = pipe(fds + i);
     if (r != 0) {
@@ -234,3 +239,4 @@ int main(int argc, char **argv) {
   grpc_iomgr_shutdown();
   return 0;
 }
+#endif /* defined(GPR_LINUX_EPOLL) */

From fcb304f493f72fa5e487b364f78126e01c550288 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Wed, 22 Jun 2016 15:25:41 -0700
Subject: [PATCH 169/280] Compilation failure

---
 test/core/iomgr/ev_epoll_linux_test.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/test/core/iomgr/ev_epoll_linux_test.c b/test/core/iomgr/ev_epoll_linux_test.c
index 66a69f52cdb..2547dc98718 100644
--- a/test/core/iomgr/ev_epoll_linux_test.c
+++ b/test/core/iomgr/ev_epoll_linux_test.c
@@ -239,4 +239,6 @@ int main(int argc, char **argv) {
   grpc_iomgr_shutdown();
   return 0;
 }
-#endif /* defined(GPR_LINUX_EPOLL) */
+#else /* defined(GPR_LINUX_EPOLL) */
+int main(int argc, char **argv) { return 0; }
+#endif /* !defined(GPR_LINUX_EPOLL) */

From 932d02725200028415f8420bdaf35d9484f419d4 Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@makarand-linux.mtv.corp.google.com>
Date: Wed, 22 Jun 2016 16:17:15 -0700
Subject: [PATCH 170/280] clang-format fixes

---
 src/core/lib/iomgr/network_status_tracker.c     | 10 +++++-----
 test/core/end2end/tests/network_status_change.c |  1 -
 2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/src/core/lib/iomgr/network_status_tracker.c b/src/core/lib/iomgr/network_status_tracker.c
index f4f8e97a252..0e34605c81d 100644
--- a/src/core/lib/iomgr/network_status_tracker.c
+++ b/src/core/lib/iomgr/network_status_tracker.c
@@ -31,9 +31,9 @@
  *
  */
 
-#include "src/core/lib/iomgr/endpoint.h"
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
+#include "src/core/lib/iomgr/endpoint.h"
 
 typedef struct endpoint_ll_node {
   grpc_endpoint *ep;
@@ -51,7 +51,7 @@ void grpc_initialize_network_status_monitor() {
 }
 
 void grpc_destroy_network_status_monitor() {
-  for (endpoint_ll_node *curr = head; curr != NULL; ) {
+  for (endpoint_ll_node *curr = head; curr != NULL;) {
     endpoint_ll_node *next = curr->next;
     gpr_free(curr);
     curr = next;
@@ -86,9 +86,9 @@ void grpc_network_status_unregister_endpoint(grpc_endpoint *ep) {
   endpoint_ll_node *prev = head;
   // if we're unregistering the head, just move head to the next
   if (ep == head->ep) {
-      head = head->next;
-      gpr_free(prev);
-      found = true;
+    head = head->next;
+    gpr_free(prev);
+    found = true;
   } else {
     for (endpoint_ll_node *curr = head->next; curr != NULL; curr = curr->next) {
       if (ep == curr->ep) {
diff --git a/test/core/end2end/tests/network_status_change.c b/test/core/end2end/tests/network_status_change.c
index bbc85007022..7e7628391de 100644
--- a/test/core/end2end/tests/network_status_change.c
+++ b/test/core/end2end/tests/network_status_change.c
@@ -217,7 +217,6 @@ static void test_invoke_network_status_change(grpc_end2end_test_config config) {
   GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
   GPR_ASSERT(was_cancelled == 0);
 
-
   gpr_free(details);
   grpc_metadata_array_destroy(&initial_metadata_recv);
   grpc_metadata_array_destroy(&trailing_metadata_recv);

From 8891ef50eef2e858b2290de36691c4b535de3acc Mon Sep 17 00:00:00 2001
From: Ken Payson <kpayson@google.com>
Date: Wed, 22 Jun 2016 16:47:52 -0700
Subject: [PATCH 171/280] Initialize port to -1

---
 src/core/lib/iomgr/tcp_server_windows.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/lib/iomgr/tcp_server_windows.c b/src/core/lib/iomgr/tcp_server_windows.c
index 2a51671ec71..86982bc1836 100644
--- a/src/core/lib/iomgr/tcp_server_windows.c
+++ b/src/core/lib/iomgr/tcp_server_windows.c
@@ -396,7 +396,7 @@ static grpc_error *add_socket_to_server(grpc_tcp_server *s, SOCKET sock,
                                         size_t addr_len, unsigned port_index,
                                         grpc_tcp_listener **listener) {
   grpc_tcp_listener *sp = NULL;
-  int port;
+  int port = -1;
   int status;
   GUID guid = WSAID_ACCEPTEX;
   DWORD ioctl_num_bytes;

From 9c578c7a734937f67b928f4511dd40448c621174 Mon Sep 17 00:00:00 2001
From: Bill Clarke <llib@origami.mtv.corp.google.com>
Date: Wed, 22 Jun 2016 16:48:08 -0700
Subject: [PATCH 172/280] Const correctness for ClientContext and ServerContext
 getters

---
 include/grpc++/impl/codegen/client_context.h | 10 +++++-----
 include/grpc++/impl/codegen/server_context.h |  7 ++++---
 2 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/include/grpc++/impl/codegen/client_context.h b/include/grpc++/impl/codegen/client_context.h
index e23fd4eda34..a132c9a57aa 100644
--- a/include/grpc++/impl/codegen/client_context.h
+++ b/include/grpc++/impl/codegen/client_context.h
@@ -193,7 +193,7 @@ class ClientContext {
   ///
   /// \return A multimap of initial metadata key-value pairs from the server.
   const std::multimap<grpc::string_ref, grpc::string_ref>&
-  GetServerInitialMetadata() {
+  GetServerInitialMetadata() const {
     GPR_CODEGEN_ASSERT(initial_metadata_received_);
     return recv_initial_metadata_;
   }
@@ -205,7 +205,7 @@ class ClientContext {
   ///
   /// \return A multimap of metadata trailing key-value pairs from the server.
   const std::multimap<grpc::string_ref, grpc::string_ref>&
-  GetServerTrailingMetadata() {
+  GetServerTrailingMetadata() const {
     // TODO(yangg) check finished
     return trailing_metadata_;
   }
@@ -230,13 +230,13 @@ class ClientContext {
 
 #ifndef GRPC_CXX0X_NO_CHRONO
   /// Return the deadline for the client call.
-  std::chrono::system_clock::time_point deadline() {
+  std::chrono::system_clock::time_point deadline() const {
     return Timespec2Timepoint(deadline_);
   }
 #endif  // !GRPC_CXX0X_NO_CHRONO
 
   /// Return a \a gpr_timespec representation of the client call's deadline.
-  gpr_timespec raw_deadline() { return deadline_; }
+  gpr_timespec raw_deadline() const { return deadline_; }
 
   /// Set the per call authority header (see
   /// https://tools.ietf.org/html/rfc7540#section-8.1.2.3).
@@ -337,7 +337,7 @@ class ClientContext {
                                   const InputMessage& request,
                                   OutputMessage* result);
 
-  grpc_call* call() { return call_; }
+  grpc_call* call() const { return call_; }
   void set_call(grpc_call* call, const std::shared_ptr<Channel>& channel);
 
   uint32_t initial_metadata_flags() const {
diff --git a/include/grpc++/impl/codegen/server_context.h b/include/grpc++/impl/codegen/server_context.h
index a1e1ed176f6..cea13a513f6 100644
--- a/include/grpc++/impl/codegen/server_context.h
+++ b/include/grpc++/impl/codegen/server_context.h
@@ -94,12 +94,12 @@ class ServerContext {
   ~ServerContext();
 
 #ifndef GRPC_CXX0X_NO_CHRONO
-  std::chrono::system_clock::time_point deadline() {
+  std::chrono::system_clock::time_point deadline() const {
     return Timespec2Timepoint(deadline_);
   }
 #endif  // !GRPC_CXX0X_NO_CHRONO
 
-  gpr_timespec raw_deadline() { return deadline_; }
+  gpr_timespec raw_deadline() const { return deadline_; }
 
   void AddInitialMetadata(const grpc::string& key, const grpc::string& value);
   void AddTrailingMetadata(const grpc::string& key, const grpc::string& value);
@@ -122,7 +122,8 @@ class ServerContext {
   // was called.
   void TryCancel() const;
 
-  const std::multimap<grpc::string_ref, grpc::string_ref>& client_metadata() {
+  const std::multimap<grpc::string_ref, grpc::string_ref>& client_metadata()
+      const {
     return client_metadata_;
   }
 

From c072c927a885e49cb13afaad11a93379a1255b9f Mon Sep 17 00:00:00 2001
From: Bill Clarke <llib@google.com>
Date: Wed, 22 Jun 2016 16:48:08 -0700
Subject: [PATCH 173/280] Const correctness for ClientContext and ServerContext
 getters

---
 include/grpc++/impl/codegen/client_context.h | 10 +++++-----
 include/grpc++/impl/codegen/server_context.h |  7 ++++---
 2 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/include/grpc++/impl/codegen/client_context.h b/include/grpc++/impl/codegen/client_context.h
index e23fd4eda34..a132c9a57aa 100644
--- a/include/grpc++/impl/codegen/client_context.h
+++ b/include/grpc++/impl/codegen/client_context.h
@@ -193,7 +193,7 @@ class ClientContext {
   ///
   /// \return A multimap of initial metadata key-value pairs from the server.
   const std::multimap<grpc::string_ref, grpc::string_ref>&
-  GetServerInitialMetadata() {
+  GetServerInitialMetadata() const {
     GPR_CODEGEN_ASSERT(initial_metadata_received_);
     return recv_initial_metadata_;
   }
@@ -205,7 +205,7 @@ class ClientContext {
   ///
   /// \return A multimap of metadata trailing key-value pairs from the server.
   const std::multimap<grpc::string_ref, grpc::string_ref>&
-  GetServerTrailingMetadata() {
+  GetServerTrailingMetadata() const {
     // TODO(yangg) check finished
     return trailing_metadata_;
   }
@@ -230,13 +230,13 @@ class ClientContext {
 
 #ifndef GRPC_CXX0X_NO_CHRONO
   /// Return the deadline for the client call.
-  std::chrono::system_clock::time_point deadline() {
+  std::chrono::system_clock::time_point deadline() const {
     return Timespec2Timepoint(deadline_);
   }
 #endif  // !GRPC_CXX0X_NO_CHRONO
 
   /// Return a \a gpr_timespec representation of the client call's deadline.
-  gpr_timespec raw_deadline() { return deadline_; }
+  gpr_timespec raw_deadline() const { return deadline_; }
 
   /// Set the per call authority header (see
   /// https://tools.ietf.org/html/rfc7540#section-8.1.2.3).
@@ -337,7 +337,7 @@ class ClientContext {
                                   const InputMessage& request,
                                   OutputMessage* result);
 
-  grpc_call* call() { return call_; }
+  grpc_call* call() const { return call_; }
   void set_call(grpc_call* call, const std::shared_ptr<Channel>& channel);
 
   uint32_t initial_metadata_flags() const {
diff --git a/include/grpc++/impl/codegen/server_context.h b/include/grpc++/impl/codegen/server_context.h
index a1e1ed176f6..cea13a513f6 100644
--- a/include/grpc++/impl/codegen/server_context.h
+++ b/include/grpc++/impl/codegen/server_context.h
@@ -94,12 +94,12 @@ class ServerContext {
   ~ServerContext();
 
 #ifndef GRPC_CXX0X_NO_CHRONO
-  std::chrono::system_clock::time_point deadline() {
+  std::chrono::system_clock::time_point deadline() const {
     return Timespec2Timepoint(deadline_);
   }
 #endif  // !GRPC_CXX0X_NO_CHRONO
 
-  gpr_timespec raw_deadline() { return deadline_; }
+  gpr_timespec raw_deadline() const { return deadline_; }
 
   void AddInitialMetadata(const grpc::string& key, const grpc::string& value);
   void AddTrailingMetadata(const grpc::string& key, const grpc::string& value);
@@ -122,7 +122,8 @@ class ServerContext {
   // was called.
   void TryCancel() const;
 
-  const std::multimap<grpc::string_ref, grpc::string_ref>& client_metadata() {
+  const std::multimap<grpc::string_ref, grpc::string_ref>& client_metadata()
+      const {
     return client_metadata_;
   }
 

From 17233ceaa9a0150eeb0959cd7953ac8be100b413 Mon Sep 17 00:00:00 2001
From: Ken Payson <kpayson@google.com>
Date: Wed, 22 Jun 2016 17:16:15 -0700
Subject: [PATCH 174/280] Ignore unused variables in ruby compilation

---
 Rakefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Rakefile b/Rakefile
index f208a24fd33..f44946fe937 100755
--- a/Rakefile
+++ b/Rakefile
@@ -77,7 +77,7 @@ task 'dlls' do
   grpc_config = ENV['GRPC_CONFIG'] || 'opt'
   verbose = ENV['V'] || '0'
 
-  env = 'CPPFLAGS="-D_WIN32_WINNT=0x600 -DUNICODE -D_UNICODE" '
+  env = 'CPPFLAGS="-D_WIN32_WINNT=0x600 -DUNICODE -D_UNICODE -Wno-unused-variable -Wno-unused-result" '
   env += 'LDFLAGS=-static '
   env += 'SYSTEM=MINGW32 '
   env += 'EMBED_ZLIB=true '

From f41ebc3968ef06439d6d1468256ac5000940ea8f Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Wed, 22 Jun 2016 12:47:14 -0700
Subject: [PATCH 175/280] remove occurences of NewClient factory method

---
 examples/csharp/helloworld/GreeterClient/Program.cs         | 2 +-
 examples/csharp/route_guide/RouteGuideClient/Program.cs     | 2 +-
 src/csharp/Grpc.Examples.Tests/MathClientServerTests.cs     | 2 +-
 src/csharp/Grpc.HealthCheck.Tests/HealthClientServerTest.cs | 2 +-
 src/csharp/Grpc.IntegrationTesting/ClientRunners.cs         | 6 +++---
 .../Grpc.IntegrationTesting/GeneratedServiceBaseTest.cs     | 2 +-
 .../Grpc.IntegrationTesting/InteropClientServerTest.cs      | 4 ++--
 .../Grpc.IntegrationTesting/MetadataCredentialsTest.cs      | 4 ++--
 src/csharp/Grpc.IntegrationTesting/SslCredentialsTest.cs    | 2 +-
 src/csharp/Grpc.IntegrationTesting/StressTestClient.cs      | 2 +-
 10 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/examples/csharp/helloworld/GreeterClient/Program.cs b/examples/csharp/helloworld/GreeterClient/Program.cs
index 4393f2f3c29..444d4735095 100644
--- a/examples/csharp/helloworld/GreeterClient/Program.cs
+++ b/examples/csharp/helloworld/GreeterClient/Program.cs
@@ -39,7 +39,7 @@ namespace GreeterClient
         {
             Channel channel = new Channel("127.0.0.1:50051", ChannelCredentials.Insecure);
 
-            var client = Greeter.NewClient(channel);
+            var client = new Greeter.GreeterClient(channel);
             String user = "you";
 
             var reply = client.SayHello(new HelloRequest { Name = user });
diff --git a/examples/csharp/route_guide/RouteGuideClient/Program.cs b/examples/csharp/route_guide/RouteGuideClient/Program.cs
index ee51fbe8e04..8a173dcc3b3 100644
--- a/examples/csharp/route_guide/RouteGuideClient/Program.cs
+++ b/examples/csharp/route_guide/RouteGuideClient/Program.cs
@@ -231,7 +231,7 @@ namespace Routeguide
         static void Main(string[] args)
         {
             var channel = new Channel("127.0.0.1:50052", ChannelCredentials.Insecure);
-            var client = new RouteGuideClient(RouteGuide.NewClient(channel));
+            var client = new RouteGuideClient(new RouteGuide.RouteGuideClient(channel));
 
             // Looking for a valid feature
             client.GetFeature(409146138, -746188906);
diff --git a/src/csharp/Grpc.Examples.Tests/MathClientServerTests.cs b/src/csharp/Grpc.Examples.Tests/MathClientServerTests.cs
index 324c209ca1d..50dacc2eaaf 100644
--- a/src/csharp/Grpc.Examples.Tests/MathClientServerTests.cs
+++ b/src/csharp/Grpc.Examples.Tests/MathClientServerTests.cs
@@ -62,7 +62,7 @@ namespace Math.Tests
             };
             server.Start();
             channel = new Channel(Host, server.Ports.Single().BoundPort, ChannelCredentials.Insecure);
-            client = Math.NewClient(channel);
+            client = new Math.MathClient(channel);
         }
 
         [TestFixtureTearDown]
diff --git a/src/csharp/Grpc.HealthCheck.Tests/HealthClientServerTest.cs b/src/csharp/Grpc.HealthCheck.Tests/HealthClientServerTest.cs
index 070674bae9d..25a58fb3864 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/HealthClientServerTest.cs
+++ b/src/csharp/Grpc.HealthCheck.Tests/HealthClientServerTest.cs
@@ -65,7 +65,7 @@ namespace Grpc.HealthCheck.Tests
             server.Start();
             channel = new Channel(Host, server.Ports.Single().BoundPort, ChannelCredentials.Insecure);
 
-            client = Grpc.Health.V1.Health.NewClient(channel);
+            client = new Grpc.Health.V1.Health.HealthClient(channel);
         }
 
         [TestFixtureTearDown]
diff --git a/src/csharp/Grpc.IntegrationTesting/ClientRunners.cs b/src/csharp/Grpc.IntegrationTesting/ClientRunners.cs
index 39b9ae08e64..b9c0fe6d0d8 100644
--- a/src/csharp/Grpc.IntegrationTesting/ClientRunners.cs
+++ b/src/csharp/Grpc.IntegrationTesting/ClientRunners.cs
@@ -211,7 +211,7 @@ namespace Grpc.IntegrationTesting
 
             bool profilerReset = false;
 
-            var client = BenchmarkService.NewClient(channel);
+            var client = new BenchmarkService.BenchmarkServiceClient(channel);
             var request = CreateSimpleRequest();
             var stopwatch = new Stopwatch();
 
@@ -237,7 +237,7 @@ namespace Grpc.IntegrationTesting
 
         private async Task RunUnaryAsync(Channel channel, IInterarrivalTimer timer)
         {
-            var client = BenchmarkService.NewClient(channel);
+            var client = new BenchmarkService.BenchmarkServiceClient(channel);
             var request = CreateSimpleRequest();
             var stopwatch = new Stopwatch();
 
@@ -256,7 +256,7 @@ namespace Grpc.IntegrationTesting
 
         private async Task RunStreamingPingPongAsync(Channel channel, IInterarrivalTimer timer)
         {
-            var client = BenchmarkService.NewClient(channel);
+            var client = new BenchmarkService.BenchmarkServiceClient(channel);
             var request = CreateSimpleRequest();
             var stopwatch = new Stopwatch();
 
diff --git a/src/csharp/Grpc.IntegrationTesting/GeneratedServiceBaseTest.cs b/src/csharp/Grpc.IntegrationTesting/GeneratedServiceBaseTest.cs
index 001533ce315..4216dc1d6be 100644
--- a/src/csharp/Grpc.IntegrationTesting/GeneratedServiceBaseTest.cs
+++ b/src/csharp/Grpc.IntegrationTesting/GeneratedServiceBaseTest.cs
@@ -61,7 +61,7 @@ namespace Grpc.IntegrationTesting
             };
             server.Start();
             channel = new Channel(Host, server.Ports.Single().BoundPort, ChannelCredentials.Insecure);
-            client = TestService.NewClient(channel);
+            client = new TestService.TestServiceClient(channel);
         }
 
         [TearDown]
diff --git a/src/csharp/Grpc.IntegrationTesting/InteropClientServerTest.cs b/src/csharp/Grpc.IntegrationTesting/InteropClientServerTest.cs
index 4ee1ff5ec8a..f907f630dab 100644
--- a/src/csharp/Grpc.IntegrationTesting/InteropClientServerTest.cs
+++ b/src/csharp/Grpc.IntegrationTesting/InteropClientServerTest.cs
@@ -69,7 +69,7 @@ namespace Grpc.IntegrationTesting
             };
             int port = server.Ports.Single().BoundPort;
             channel = new Channel(Host, port, TestCredentials.CreateSslCredentials(), options);
-            client = TestService.NewClient(channel);
+            client = new TestService.TestServiceClient(channel);
         }
 
         [TestFixtureTearDown]
@@ -148,7 +148,7 @@ namespace Grpc.IntegrationTesting
         [Test]
         public void UnimplementedMethod()
         {
-            InteropClient.RunUnimplementedMethod(UnimplementedService.NewClient(channel));
+            InteropClient.RunUnimplementedMethod(new UnimplementedService.UnimplementedServiceClient(channel));
         }
     }
 }
diff --git a/src/csharp/Grpc.IntegrationTesting/MetadataCredentialsTest.cs b/src/csharp/Grpc.IntegrationTesting/MetadataCredentialsTest.cs
index 9fd575f1900..eb3bb8a28bb 100644
--- a/src/csharp/Grpc.IntegrationTesting/MetadataCredentialsTest.cs
+++ b/src/csharp/Grpc.IntegrationTesting/MetadataCredentialsTest.cs
@@ -88,7 +88,7 @@ namespace Grpc.IntegrationTesting
             var channelCredentials = ChannelCredentials.Create(TestCredentials.CreateSslCredentials(),
                 CallCredentials.FromInterceptor(asyncAuthInterceptor));
             channel = new Channel(Host, server.Ports.Single().BoundPort, channelCredentials, options);
-            client = TestService.NewClient(channel);
+            client = new TestService.TestServiceClient(channel);
 
             client.UnaryCall(new SimpleRequest { });
         }
@@ -97,7 +97,7 @@ namespace Grpc.IntegrationTesting
         public void MetadataCredentials_PerCall()
         {
             channel = new Channel(Host, server.Ports.Single().BoundPort, TestCredentials.CreateSslCredentials(), options);
-            client = TestService.NewClient(channel);
+            client = new TestService.TestServiceClient(channel);
 
             var callCredentials = CallCredentials.FromInterceptor(asyncAuthInterceptor);
             client.UnaryCall(new SimpleRequest { }, new CallOptions(credentials: callCredentials));
diff --git a/src/csharp/Grpc.IntegrationTesting/SslCredentialsTest.cs b/src/csharp/Grpc.IntegrationTesting/SslCredentialsTest.cs
index 3df45b5f708..f85e272711f 100644
--- a/src/csharp/Grpc.IntegrationTesting/SslCredentialsTest.cs
+++ b/src/csharp/Grpc.IntegrationTesting/SslCredentialsTest.cs
@@ -79,7 +79,7 @@ namespace Grpc.IntegrationTesting
             };
 
             channel = new Channel(Host, server.Ports.Single().BoundPort, clientCredentials, options);
-            client = TestService.NewClient(channel);
+            client = new TestService.TestServiceClient(channel);
         }
 
         [TestFixtureTearDown]
diff --git a/src/csharp/Grpc.IntegrationTesting/StressTestClient.cs b/src/csharp/Grpc.IntegrationTesting/StressTestClient.cs
index 4d6ca7ece57..74ee040ae49 100644
--- a/src/csharp/Grpc.IntegrationTesting/StressTestClient.cs
+++ b/src/csharp/Grpc.IntegrationTesting/StressTestClient.cs
@@ -148,7 +148,7 @@ namespace Grpc.IntegrationTesting
                     channels.Add(channel);
                     for (int j = 0; j < options.NumStubsPerChannel; j++)
                     {
-                        var client = TestService.NewClient(channel);
+                        var client = new TestService.TestServiceClient(channel);
                         var task = Task.Factory.StartNew(() => RunBodyAsync(client).GetAwaiter().GetResult(),
                             TaskCreationOptions.LongRunning);
                         tasks.Add(task);  

From bfcd6b627ece5ddab1aa690e4bf205a6c66d8fe3 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Wed, 22 Jun 2016 16:52:46 -0700
Subject: [PATCH 176/280] generate comments for C# client constructors

---
 src/compiler/csharp_generator.cc | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/compiler/csharp_generator.cc b/src/compiler/csharp_generator.cc
index 8c1c6f2c826..f5a0876cf98 100644
--- a/src/compiler/csharp_generator.cc
+++ b/src/compiler/csharp_generator.cc
@@ -333,22 +333,28 @@ void GenerateClientStub(Printer* out, const ServiceDescriptor *service) {
   out->Indent();
 
   // constructors
+  out->Print("/// <summary>Creates a new client for $servicename$</summary>\n"
+             "/// <param name=\"channel\">The channel to use to make remote calls.</param>\n",
+             "servicename", GetServiceClassName(service));
   out->Print("public $name$(Channel channel) : base(channel)\n",
              "name", GetClientClassName(service));
   out->Print("{\n");
   out->Print("}\n");
+  out->Print("/// <summary>Creates a new client for $servicename$ that uses a custom <c>CallInvoker</c>.</summary>\n"
+             "/// <param name=\"callInvoker\">The callInvoker to use to make remote calls.</param>\n",
+             "servicename", GetServiceClassName(service));
   out->Print("public $name$(CallInvoker callInvoker) : base(callInvoker)\n",
              "name", GetClientClassName(service));
   out->Print("{\n");
   out->Print("}\n");
-  out->Print("///<summary>Protected parameterless constructor to allow creation"
+  out->Print("/// <summary>Protected parameterless constructor to allow creation"
              " of test doubles.</summary>\n");
   out->Print("protected $name$() : base()\n",
              "name", GetClientClassName(service));
   out->Print("{\n");
   out->Print("}\n");
-  out->Print("///<summary>Protected constructor to allow creation of configured"
-             " clients.</summary>\n");
+  out->Print("/// <summary>Protected constructor to allow creation of configured clients.</summary>\n"
+             "/// <param name=\"configuration\">The client configuration.</param>\n");
   out->Print("protected $name$(ClientBaseConfiguration configuration)"
              " : base(configuration)\n",
              "name", GetClientClassName(service));

From ed6ea4c691193483223fdb3a7ada5095b8a2494e Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Wed, 22 Jun 2016 12:38:44 -0700
Subject: [PATCH 177/280] regenerate protos

---
 src/csharp/Grpc.Examples/MathGrpc.cs          | 15 +++----
 src/csharp/Grpc.HealthCheck/HealthGrpc.cs     | 15 +++----
 .../Grpc.IntegrationTesting/MetricsGrpc.cs    | 15 +++----
 .../Grpc.IntegrationTesting/ServicesGrpc.cs   | 30 ++++++-------
 .../Grpc.IntegrationTesting/TestGrpc.cs       | 45 +++++++++----------
 5 files changed, 56 insertions(+), 64 deletions(-)

diff --git a/src/csharp/Grpc.Examples/MathGrpc.cs b/src/csharp/Grpc.Examples/MathGrpc.cs
index 4bbefcbe01a..25abc514195 100644
--- a/src/csharp/Grpc.Examples/MathGrpc.cs
+++ b/src/csharp/Grpc.Examples/MathGrpc.cs
@@ -128,17 +128,22 @@ namespace Math {
     /// <summary>Client for Math</summary>
     public class MathClient : ClientBase<MathClient>
     {
+      /// <summary>Creates a new client for Math</summary>
+      /// <param name="channel">The channel to use to make remote calls.</param>
       public MathClient(Channel channel) : base(channel)
       {
       }
+      /// <summary>Creates a new client for Math that uses a custom <c>CallInvoker</c>.</summary>
+      /// <param name="callInvoker">The callInvoker to use to make remote calls.</param>
       public MathClient(CallInvoker callInvoker) : base(callInvoker)
       {
       }
-      ///<summary>Protected parameterless constructor to allow creation of test doubles.</summary>
+      /// <summary>Protected parameterless constructor to allow creation of test doubles.</summary>
       protected MathClient() : base()
       {
       }
-      ///<summary>Protected constructor to allow creation of configured clients.</summary>
+      /// <summary>Protected constructor to allow creation of configured clients.</summary>
+      /// <param name="configuration">The client configuration.</param>
       protected MathClient(ClientBaseConfiguration configuration) : base(configuration)
       {
       }
@@ -235,12 +240,6 @@ namespace Math {
       }
     }
 
-    /// <summary>Creates a new client for Math</summary>
-    public static MathClient NewClient(Channel channel)
-    {
-      return new MathClient(channel);
-    }
-
     /// <summary>Creates service definition that can be registered with a server</summary>
     public static ServerServiceDefinition BindService(MathBase serviceImpl)
     {
diff --git a/src/csharp/Grpc.HealthCheck/HealthGrpc.cs b/src/csharp/Grpc.HealthCheck/HealthGrpc.cs
index d0ade7d02be..43eea0f22f5 100644
--- a/src/csharp/Grpc.HealthCheck/HealthGrpc.cs
+++ b/src/csharp/Grpc.HealthCheck/HealthGrpc.cs
@@ -71,17 +71,22 @@ namespace Grpc.Health.V1 {
     /// <summary>Client for Health</summary>
     public class HealthClient : ClientBase<HealthClient>
     {
+      /// <summary>Creates a new client for Health</summary>
+      /// <param name="channel">The channel to use to make remote calls.</param>
       public HealthClient(Channel channel) : base(channel)
       {
       }
+      /// <summary>Creates a new client for Health that uses a custom <c>CallInvoker</c>.</summary>
+      /// <param name="callInvoker">The callInvoker to use to make remote calls.</param>
       public HealthClient(CallInvoker callInvoker) : base(callInvoker)
       {
       }
-      ///<summary>Protected parameterless constructor to allow creation of test doubles.</summary>
+      /// <summary>Protected parameterless constructor to allow creation of test doubles.</summary>
       protected HealthClient() : base()
       {
       }
-      ///<summary>Protected constructor to allow creation of configured clients.</summary>
+      /// <summary>Protected constructor to allow creation of configured clients.</summary>
+      /// <param name="configuration">The client configuration.</param>
       protected HealthClient(ClientBaseConfiguration configuration) : base(configuration)
       {
       }
@@ -108,12 +113,6 @@ namespace Grpc.Health.V1 {
       }
     }
 
-    /// <summary>Creates a new client for Health</summary>
-    public static HealthClient NewClient(Channel channel)
-    {
-      return new HealthClient(channel);
-    }
-
     /// <summary>Creates service definition that can be registered with a server</summary>
     public static ServerServiceDefinition BindService(HealthBase serviceImpl)
     {
diff --git a/src/csharp/Grpc.IntegrationTesting/MetricsGrpc.cs b/src/csharp/Grpc.IntegrationTesting/MetricsGrpc.cs
index 22bd27ec0aa..040798e3c21 100644
--- a/src/csharp/Grpc.IntegrationTesting/MetricsGrpc.cs
+++ b/src/csharp/Grpc.IntegrationTesting/MetricsGrpc.cs
@@ -97,17 +97,22 @@ namespace Grpc.Testing {
     /// <summary>Client for MetricsService</summary>
     public class MetricsServiceClient : ClientBase<MetricsServiceClient>
     {
+      /// <summary>Creates a new client for MetricsService</summary>
+      /// <param name="channel">The channel to use to make remote calls.</param>
       public MetricsServiceClient(Channel channel) : base(channel)
       {
       }
+      /// <summary>Creates a new client for MetricsService that uses a custom <c>CallInvoker</c>.</summary>
+      /// <param name="callInvoker">The callInvoker to use to make remote calls.</param>
       public MetricsServiceClient(CallInvoker callInvoker) : base(callInvoker)
       {
       }
-      ///<summary>Protected parameterless constructor to allow creation of test doubles.</summary>
+      /// <summary>Protected parameterless constructor to allow creation of test doubles.</summary>
       protected MetricsServiceClient() : base()
       {
       }
-      ///<summary>Protected constructor to allow creation of configured clients.</summary>
+      /// <summary>Protected constructor to allow creation of configured clients.</summary>
+      /// <param name="configuration">The client configuration.</param>
       protected MetricsServiceClient(ClientBaseConfiguration configuration) : base(configuration)
       {
       }
@@ -162,12 +167,6 @@ namespace Grpc.Testing {
       }
     }
 
-    /// <summary>Creates a new client for MetricsService</summary>
-    public static MetricsServiceClient NewClient(Channel channel)
-    {
-      return new MetricsServiceClient(channel);
-    }
-
     /// <summary>Creates service definition that can be registered with a server</summary>
     public static ServerServiceDefinition BindService(MetricsServiceBase serviceImpl)
     {
diff --git a/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs b/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs
index 9c99296115c..e205dea93ea 100644
--- a/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs
+++ b/src/csharp/Grpc.IntegrationTesting/ServicesGrpc.cs
@@ -93,17 +93,22 @@ namespace Grpc.Testing {
     /// <summary>Client for BenchmarkService</summary>
     public class BenchmarkServiceClient : ClientBase<BenchmarkServiceClient>
     {
+      /// <summary>Creates a new client for BenchmarkService</summary>
+      /// <param name="channel">The channel to use to make remote calls.</param>
       public BenchmarkServiceClient(Channel channel) : base(channel)
       {
       }
+      /// <summary>Creates a new client for BenchmarkService that uses a custom <c>CallInvoker</c>.</summary>
+      /// <param name="callInvoker">The callInvoker to use to make remote calls.</param>
       public BenchmarkServiceClient(CallInvoker callInvoker) : base(callInvoker)
       {
       }
-      ///<summary>Protected parameterless constructor to allow creation of test doubles.</summary>
+      /// <summary>Protected parameterless constructor to allow creation of test doubles.</summary>
       protected BenchmarkServiceClient() : base()
       {
       }
-      ///<summary>Protected constructor to allow creation of configured clients.</summary>
+      /// <summary>Protected constructor to allow creation of configured clients.</summary>
+      /// <param name="configuration">The client configuration.</param>
       protected BenchmarkServiceClient(ClientBaseConfiguration configuration) : base(configuration)
       {
       }
@@ -162,12 +167,6 @@ namespace Grpc.Testing {
       }
     }
 
-    /// <summary>Creates a new client for BenchmarkService</summary>
-    public static BenchmarkServiceClient NewClient(Channel channel)
-    {
-      return new BenchmarkServiceClient(channel);
-    }
-
     /// <summary>Creates service definition that can be registered with a server</summary>
     public static ServerServiceDefinition BindService(BenchmarkServiceBase serviceImpl)
     {
@@ -273,17 +272,22 @@ namespace Grpc.Testing {
     /// <summary>Client for WorkerService</summary>
     public class WorkerServiceClient : ClientBase<WorkerServiceClient>
     {
+      /// <summary>Creates a new client for WorkerService</summary>
+      /// <param name="channel">The channel to use to make remote calls.</param>
       public WorkerServiceClient(Channel channel) : base(channel)
       {
       }
+      /// <summary>Creates a new client for WorkerService that uses a custom <c>CallInvoker</c>.</summary>
+      /// <param name="callInvoker">The callInvoker to use to make remote calls.</param>
       public WorkerServiceClient(CallInvoker callInvoker) : base(callInvoker)
       {
       }
-      ///<summary>Protected parameterless constructor to allow creation of test doubles.</summary>
+      /// <summary>Protected parameterless constructor to allow creation of test doubles.</summary>
       protected WorkerServiceClient() : base()
       {
       }
-      ///<summary>Protected constructor to allow creation of configured clients.</summary>
+      /// <summary>Protected constructor to allow creation of configured clients.</summary>
+      /// <param name="configuration">The client configuration.</param>
       protected WorkerServiceClient(ClientBaseConfiguration configuration) : base(configuration)
       {
       }
@@ -398,12 +402,6 @@ namespace Grpc.Testing {
       }
     }
 
-    /// <summary>Creates a new client for WorkerService</summary>
-    public static WorkerServiceClient NewClient(Channel channel)
-    {
-      return new WorkerServiceClient(channel);
-    }
-
     /// <summary>Creates service definition that can be registered with a server</summary>
     public static ServerServiceDefinition BindService(WorkerServiceBase serviceImpl)
     {
diff --git a/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs b/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs
index 6c252013f84..3e149da3e01 100644
--- a/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs
+++ b/src/csharp/Grpc.IntegrationTesting/TestGrpc.cs
@@ -168,17 +168,22 @@ namespace Grpc.Testing {
     /// <summary>Client for TestService</summary>
     public class TestServiceClient : ClientBase<TestServiceClient>
     {
+      /// <summary>Creates a new client for TestService</summary>
+      /// <param name="channel">The channel to use to make remote calls.</param>
       public TestServiceClient(Channel channel) : base(channel)
       {
       }
+      /// <summary>Creates a new client for TestService that uses a custom <c>CallInvoker</c>.</summary>
+      /// <param name="callInvoker">The callInvoker to use to make remote calls.</param>
       public TestServiceClient(CallInvoker callInvoker) : base(callInvoker)
       {
       }
-      ///<summary>Protected parameterless constructor to allow creation of test doubles.</summary>
+      /// <summary>Protected parameterless constructor to allow creation of test doubles.</summary>
       protected TestServiceClient() : base()
       {
       }
-      ///<summary>Protected constructor to allow creation of configured clients.</summary>
+      /// <summary>Protected constructor to allow creation of configured clients.</summary>
+      /// <param name="configuration">The client configuration.</param>
       protected TestServiceClient(ClientBaseConfiguration configuration) : base(configuration)
       {
       }
@@ -315,12 +320,6 @@ namespace Grpc.Testing {
       }
     }
 
-    /// <summary>Creates a new client for TestService</summary>
-    public static TestServiceClient NewClient(Channel channel)
-    {
-      return new TestServiceClient(channel);
-    }
-
     /// <summary>Creates service definition that can be registered with a server</summary>
     public static ServerServiceDefinition BindService(TestServiceBase serviceImpl)
     {
@@ -373,17 +372,22 @@ namespace Grpc.Testing {
     /// <summary>Client for UnimplementedService</summary>
     public class UnimplementedServiceClient : ClientBase<UnimplementedServiceClient>
     {
+      /// <summary>Creates a new client for UnimplementedService</summary>
+      /// <param name="channel">The channel to use to make remote calls.</param>
       public UnimplementedServiceClient(Channel channel) : base(channel)
       {
       }
+      /// <summary>Creates a new client for UnimplementedService that uses a custom <c>CallInvoker</c>.</summary>
+      /// <param name="callInvoker">The callInvoker to use to make remote calls.</param>
       public UnimplementedServiceClient(CallInvoker callInvoker) : base(callInvoker)
       {
       }
-      ///<summary>Protected parameterless constructor to allow creation of test doubles.</summary>
+      /// <summary>Protected parameterless constructor to allow creation of test doubles.</summary>
       protected UnimplementedServiceClient() : base()
       {
       }
-      ///<summary>Protected constructor to allow creation of configured clients.</summary>
+      /// <summary>Protected constructor to allow creation of configured clients.</summary>
+      /// <param name="configuration">The client configuration.</param>
       protected UnimplementedServiceClient(ClientBaseConfiguration configuration) : base(configuration)
       {
       }
@@ -422,12 +426,6 @@ namespace Grpc.Testing {
       }
     }
 
-    /// <summary>Creates a new client for UnimplementedService</summary>
-    public static UnimplementedServiceClient NewClient(Channel channel)
-    {
-      return new UnimplementedServiceClient(channel);
-    }
-
     /// <summary>Creates service definition that can be registered with a server</summary>
     public static ServerServiceDefinition BindService(UnimplementedServiceBase serviceImpl)
     {
@@ -485,17 +483,22 @@ namespace Grpc.Testing {
     /// <summary>Client for ReconnectService</summary>
     public class ReconnectServiceClient : ClientBase<ReconnectServiceClient>
     {
+      /// <summary>Creates a new client for ReconnectService</summary>
+      /// <param name="channel">The channel to use to make remote calls.</param>
       public ReconnectServiceClient(Channel channel) : base(channel)
       {
       }
+      /// <summary>Creates a new client for ReconnectService that uses a custom <c>CallInvoker</c>.</summary>
+      /// <param name="callInvoker">The callInvoker to use to make remote calls.</param>
       public ReconnectServiceClient(CallInvoker callInvoker) : base(callInvoker)
       {
       }
-      ///<summary>Protected parameterless constructor to allow creation of test doubles.</summary>
+      /// <summary>Protected parameterless constructor to allow creation of test doubles.</summary>
       protected ReconnectServiceClient() : base()
       {
       }
-      ///<summary>Protected constructor to allow creation of configured clients.</summary>
+      /// <summary>Protected constructor to allow creation of configured clients.</summary>
+      /// <param name="configuration">The client configuration.</param>
       protected ReconnectServiceClient(ClientBaseConfiguration configuration) : base(configuration)
       {
       }
@@ -538,12 +541,6 @@ namespace Grpc.Testing {
       }
     }
 
-    /// <summary>Creates a new client for ReconnectService</summary>
-    public static ReconnectServiceClient NewClient(Channel channel)
-    {
-      return new ReconnectServiceClient(channel);
-    }
-
     /// <summary>Creates service definition that can be registered with a server</summary>
     public static ServerServiceDefinition BindService(ReconnectServiceBase serviceImpl)
     {

From 0224dcc2dcda932a171776de325fa2e66c95478f Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Wed, 22 Jun 2016 18:04:00 -0700
Subject: [PATCH 178/280] clang format

---
 src/core/lib/iomgr/ev_epoll_linux.c | 12 ++++++------
 src/core/lib/iomgr/ev_posix.h       |  2 +-
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 88cbc586349..b1e9ac8a631 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -323,7 +323,7 @@ static void polling_island_add_fds_locked(polling_island *pi, grpc_fd **fds,
 
 #ifdef GRPC_TSAN
   /* See the definition of g_epoll_sync for more context */
-  gpr_atm_rel_store(&g_epoll_sync, (gpr_atm) 0);
+  gpr_atm_rel_store(&g_epoll_sync, (gpr_atm)0);
 #endif /* defined(GRPC_TSAN) */
 
   for (i = 0; i < fd_count; i++) {
@@ -443,8 +443,8 @@ static polling_island *polling_island_create(grpc_fd *initial_fd) {
     pi->fds = NULL;
   }
 
-  gpr_atm_rel_store(&pi->ref_count, (gpr_atm) 0);
-  gpr_atm_rel_store(&pi->merged_to, (gpr_atm) NULL);
+  gpr_atm_rel_store(&pi->ref_count, (gpr_atm)0);
+  gpr_atm_rel_store(&pi->merged_to, (gpr_atm)NULL);
 
   pi->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
 
@@ -473,7 +473,7 @@ static polling_island *polling_island_create(grpc_fd *initial_fd) {
 static void polling_island_delete(polling_island *pi) {
   GPR_ASSERT(pi->fd_cnt == 0);
 
-  gpr_atm_rel_store(&pi->merged_to, (gpr_atm) NULL);
+  gpr_atm_rel_store(&pi->merged_to, (gpr_atm)NULL);
 
   close(pi->epoll_fd);
   pi->epoll_fd = -1;
@@ -649,7 +649,7 @@ static polling_island *polling_island_merge(polling_island *p,
   polling_island_add_wakeup_fd_locked(p, &polling_island_wakeup_fd);
 
   /* Add the 'merged_to' link from p --> q */
-  gpr_atm_rel_store(&p->merged_to, (gpr_atm) q);
+  gpr_atm_rel_store(&p->merged_to, (gpr_atm)q);
   PI_ADD_REF(q, "pi_merge"); /* To account for the new incoming ref from p */
 
   gpr_mu_unlock(&p->mu);
@@ -811,7 +811,7 @@ static grpc_fd *fd_create(int fd, const char *name) {
      holding a lock to it anyway. */
   gpr_mu_lock(&new_fd->mu);
 
-  gpr_atm_rel_store(&new_fd->refst, (gpr_atm) 1);
+  gpr_atm_rel_store(&new_fd->refst, (gpr_atm)1);
   new_fd->fd = fd;
   new_fd->shutdown = false;
   new_fd->orphaned = false;
diff --git a/src/core/lib/iomgr/ev_posix.h b/src/core/lib/iomgr/ev_posix.h
index 32260fe2ee5..579c84ef707 100644
--- a/src/core/lib/iomgr/ev_posix.h
+++ b/src/core/lib/iomgr/ev_posix.h
@@ -100,7 +100,7 @@ void grpc_event_engine_init(void);
 void grpc_event_engine_shutdown(void);
 
 /* Return the name of the poll strategy */
-const char* grpc_get_poll_strategy_name();
+const char *grpc_get_poll_strategy_name();
 
 /* Create a wrapped file descriptor.
    Requires fd is a non-blocking file descriptor.

From cc00745e8c6e160665e753c9fda6bf2650b1823d Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Thu, 23 Jun 2016 00:18:15 -0700
Subject: [PATCH 179/280] brought spec up to date

---
 doc/compression.md | 31 +++++++++++++++++++------------
 1 file changed, 19 insertions(+), 12 deletions(-)

diff --git a/doc/compression.md b/doc/compression.md
index 15fae4d29bf..9229ef9af10 100644
--- a/doc/compression.md
+++ b/doc/compression.md
@@ -42,13 +42,13 @@ and RPC settings (for example, if compression would result in small or negative
 gains).
 
 When a message from a client compressed with an unsupported algorithm is
-processed by a server, it WILL result in an INVALID\_ARGUMENT error on the
+processed by a server, it WILL result in a `UNIMPLEMENTED` error status on the
 server. The server will then include in its response a `grpc-accept-encoding`
-header specifying the algorithms it does accept. If an INTERNAL error is
-returned from the server despite having used one of the algorithms from the
-`grpc-accept-encoding` header, the cause MUST NOT be related to compression.
-Data sent from a server compressed with an algorithm not supported by the client
-WILL result in an INTERNAL error on the client side.
+header specifying the algorithms it does accept. If an `UNIMPLEMENTED` error
+status is returned from the server despite having used one of the algorithms
+from the `grpc-accept-encoding` header, the cause MUST NOT be related to
+compression. Data sent from a server compressed with an algorithm not supported
+by the client WILL result in an `INTERNAL` error status on the client side.
 
 Note that a peer MAY choose to not disclose all the encodings it supports.
 However, if it receives a message compressed in an undisclosed but supported
@@ -99,13 +99,20 @@ compressed.
 channel compression configuration MUST be used.
 1. When a compression method (including no compression) is specified for an
 outgoing message, the message MUST be compressed accordingly.
-1. A message compressed in a way not supported by its endpoint MUST fail with
-INVALID\_ARGUMENT status, its associated description indicating the unsupported
-condition as well as the supported ones. The returned `grpc-accept-encoding`
-header MUST NOT contain the compression method (encoding) used.
+1. A message compressed by a client in a way not supported by its server MUST
+fail with status `UNIMPLEMENTED`, its associated description indicating the
+unsupported condition as well as the supported ones. The returned
+`grpc-accept-encoding` header MUST NOT contain the compression method
+(encoding) used.
+1. A message compressed by a server in a way not supported by its client MUST
+fail with status `INTERNAL`, its associated description indicating the
+unsupported condition as well as the supported ones. The returned
+`grpc-accept-encoding` header MUST NOT contain the compression method
+(encoding) used.
 1. An ill-constructed message with its [Compressed-Flag
 bit](PROTOCOL-HTTP2.md#compressed-flag)
 set but lacking a
 "[grpc-encoding](PROTOCOL-HTTP2.md#message-encoding)"
-entry different from _identity_ in its metadata MUST fail with INTERNAL status,
-its associated description indicating the invalid Compressed-Flag condition.
+entry different from _identity_ in its metadata MUST fail with `INTERNAL`
+status, its associated description indicating the invalid Compressed-Flag
+condition.

From c9b7ad0c0a541ac7559bb7081c260de195fe8315 Mon Sep 17 00:00:00 2001
From: Ken Payson <kpayson@google.com>
Date: Thu, 23 Jun 2016 02:38:20 -0700
Subject: [PATCH 180/280] Updated grpcio c extension build for windows to use
 mingw.

The default compiler for Python c extensions is VS2008
or VS2010 depending on the Python version.  Since c-core
moved onto the c99 standard, these compilers are not
compatible.
---
 tools/run_tests/build_artifact_python.bat | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/tools/run_tests/build_artifact_python.bat b/tools/run_tests/build_artifact_python.bat
index fea0275426f..295347e947c 100644
--- a/tools/run_tests/build_artifact_python.bat
+++ b/tools/run_tests/build_artifact_python.bat
@@ -37,10 +37,11 @@ set NUGET=C:\nuget\nuget.exe
 
 mkdir src\python\grpcio\grpc\_cython\_windows
 
+@rem TODO(atash): maybe we could avoid the grpc_c.(32|64).python shim below if
+@rem this used the right python build?
 copy /Y vsprojects\Release\grpc_dll.dll src\python\grpcio\grpc\_cython\_windows\grpc_c.32.python || goto :error
 copy /Y vsprojects\x64\Release\grpc_dll.dll src\python\grpcio\grpc\_cython\_windows\grpc_c.64.python || goto :error
 
-
 set PATH=C:\%1;C:\%1\scripts;C:\msys64\mingw%2\bin;%PATH%
 
 pip install --upgrade six
@@ -50,12 +51,6 @@ pip install -rrequirements.txt
 set GRPC_PYTHON_USE_CUSTOM_BDIST=0
 set GRPC_PYTHON_BUILD_WITH_CYTHON=1
 
-@rem TODO(atash): maybe we could avoid the grpc_c.(32|64).python shim above if
-@rem this used the right python build?
-python setup.py bdist_wheel
-
-@rem Build gRPC Python tools
-@rem
 @rem Because this is windows and *everything seems to hate Windows* we have to
 @rem set all of these flags ourselves because Python won't help us (see the
 @rem setup.py of the grpcio_tools project).
@@ -70,6 +65,18 @@ set GRPC_PYTHON_CFLAGS=-fno-wrapv -frtti -std=c++11
 python -c "from distutils.cygwinccompiler import get_msvcr; print(get_msvcr()[0])" > temp.txt
 set /p PYTHON_MSVCR=<temp.txt
 set GRPC_PYTHON_LDFLAGS=-static-libgcc -static-libstdc++ -mcrtdll=%PYTHON_MSVCR% -static -lpthread
+
+
+@rem Build gRPC
+if %2 == 32 (
+  python setup.py build_ext -c mingw32
+) else (
+  python setup.py build_ext -c mingw32 -DMS_WIN64
+)
+python setup.py bdist_wheel
+
+
+@rem Build gRPC Python tools
 python tools\distrib\python\make_grpcio_tools.py
 if %2 == 32 (
   python tools\distrib\python\grpcio_tools\setup.py build_ext -c mingw32

From 44f6245656bb32660fc5d2e88bb4db739356cc6e Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Thu, 23 Jun 2016 08:22:30 -0700
Subject: [PATCH 181/280] Re-enable accidentally disabled traces

---
 src/core/lib/iomgr/tcp_posix.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/core/lib/iomgr/tcp_posix.c b/src/core/lib/iomgr/tcp_posix.c
index 017f52c3677..1046b60bcc9 100644
--- a/src/core/lib/iomgr/tcp_posix.c
+++ b/src/core/lib/iomgr/tcp_posix.c
@@ -160,7 +160,7 @@ static void call_read_cb(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp,
                          grpc_error *error) {
   grpc_closure *cb = tcp->read_cb;
 
-  if (false && grpc_tcp_trace) {
+  if (grpc_tcp_trace) {
     size_t i;
     const char *str = grpc_error_string(error);
     gpr_log(GPR_DEBUG, "read: error=%s", str);
@@ -394,7 +394,7 @@ static void tcp_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
   grpc_tcp *tcp = (grpc_tcp *)ep;
   grpc_error *error = GRPC_ERROR_NONE;
 
-  if (false && grpc_tcp_trace) {
+  if (grpc_tcp_trace) {
     size_t i;
 
     for (i = 0; i < buf->count; i++) {

From 75f6828636a432ff32435ac06a6121b8396c67fd Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Thu, 23 Jun 2016 10:16:16 -0700
Subject: [PATCH 182/280] Fixed typo

---
 doc/compression.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/compression.md b/doc/compression.md
index 9229ef9af10..de245d90fee 100644
--- a/doc/compression.md
+++ b/doc/compression.md
@@ -42,7 +42,7 @@ and RPC settings (for example, if compression would result in small or negative
 gains).
 
 When a message from a client compressed with an unsupported algorithm is
-processed by a server, it WILL result in a `UNIMPLEMENTED` error status on the
+processed by a server, it WILL result in an `UNIMPLEMENTED` error status on the
 server. The server will then include in its response a `grpc-accept-encoding`
 header specifying the algorithms it does accept. If an `UNIMPLEMENTED` error
 status is returned from the server despite having used one of the algorithms

From dde4fc66fb55291434a017c667d6a961332801e6 Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@google.com>
Date: Thu, 23 Jun 2016 10:35:19 -0700
Subject: [PATCH 183/280] changed service to _service, and added a TODO

TODO for removing boilerplate code
---
 .../objective-c/route_guide/ViewControllers.m | 27 ++++++++++---------
 1 file changed, 14 insertions(+), 13 deletions(-)

diff --git a/examples/objective-c/route_guide/ViewControllers.m b/examples/objective-c/route_guide/ViewControllers.m
index 5fd411e3ba6..a5c03e9cfca 100644
--- a/examples/objective-c/route_guide/ViewControllers.m
+++ b/examples/objective-c/route_guide/ViewControllers.m
@@ -81,7 +81,7 @@ static NSString * const kHostAddress = @"localhost:50051";
  * not to have a feature.
  */
 @interface GetFeatureViewController : UIViewController {
-  RTGRouteGuide *service;
+  RTGRouteGuide *_service;
 }
 @property (weak, nonatomic) IBOutlet UILabel *outputLabel;
 @end
@@ -90,6 +90,7 @@ static NSString * const kHostAddress = @"localhost:50051";
 
 - (void)execRequest {
   void (^handler)(RTGFeature *response, NSError *error) = ^(RTGFeature *response, NSError *error) {
+    // TODO(makdharma): Remove boilerplate by consolidating into one log function.
     if (response.name.length) {
       NSString *str =[NSString stringWithFormat:@"%@\nFound feature called %@ at %@.", self.outputLabel.text, response.location, response.name];
       self.outputLabel.text = str;
@@ -109,8 +110,8 @@ static NSString * const kHostAddress = @"localhost:50051";
   point.latitude = 409146138;
   point.longitude = -746188906;
 
-  [service getFeatureWithRequest:point handler:handler];
-  [service getFeatureWithRequest:[RTGPoint message] handler:handler];
+  [_service getFeatureWithRequest:point handler:handler];
+  [_service getFeatureWithRequest:[RTGPoint message] handler:handler];
 }
 
 - (void)viewDidLoad {
@@ -119,7 +120,7 @@ static NSString * const kHostAddress = @"localhost:50051";
   // This only needs to be done once per host, before creating service objects for that host.
   [GRPCCall useInsecureConnectionsForHost:kHostAddress];
 
-  service = [[RTGRouteGuide alloc] initWithHost:kHostAddress];
+  _service = [[RTGRouteGuide alloc] initWithHost:kHostAddress];
 }
 
 - (void)viewDidAppear:(BOOL)animated {
@@ -139,7 +140,7 @@ static NSString * const kHostAddress = @"localhost:50051";
  * the pre-generated database. Prints each response as it comes in.
  */
 @interface ListFeaturesViewController : UIViewController {
-  RTGRouteGuide *service;
+  RTGRouteGuide *_service;
 }
 @property (weak, nonatomic) IBOutlet UILabel *outputLabel;
 
@@ -155,7 +156,7 @@ static NSString * const kHostAddress = @"localhost:50051";
   rectangle.hi.longitude = -745E6;
 
   NSLog(@"Looking for features between %@ and %@", rectangle.lo, rectangle.hi);
-  [service listFeaturesWithRequest:rectangle
+  [_service listFeaturesWithRequest:rectangle
                       eventHandler:^(BOOL done, RTGFeature *response, NSError *error) {
     if (response) {
       NSString *str =[NSString stringWithFormat:@"%@\nFound feature at %@ called %@.", self.outputLabel.text, response.location, response.name];
@@ -172,7 +173,7 @@ static NSString * const kHostAddress = @"localhost:50051";
 - (void)viewDidLoad {
   [super viewDidLoad];
 
-  service = [[RTGRouteGuide alloc] initWithHost:kHostAddress];
+  _service = [[RTGRouteGuide alloc] initWithHost:kHostAddress];
 }
 
 - (void)viewDidAppear:(BOOL)animated {
@@ -193,7 +194,7 @@ static NSString * const kHostAddress = @"localhost:50051";
  * server.
  */
 @interface RecordRouteViewController : UIViewController {
-  RTGRouteGuide *service;
+  RTGRouteGuide *_service;
 }
 @property (weak, nonatomic) IBOutlet UILabel *outputLabel;
 
@@ -217,7 +218,7 @@ static NSString * const kHostAddress = @"localhost:50051";
     return location;
   }];
 
-  [service recordRouteWithRequestsWriter:locations
+  [_service recordRouteWithRequestsWriter:locations
                                  handler:^(RTGRouteSummary *response, NSError *error) {
     if (response) {
       NSString *str =[NSString stringWithFormat:
@@ -241,7 +242,7 @@ static NSString * const kHostAddress = @"localhost:50051";
 - (void)viewDidLoad {
   [super viewDidLoad];
 
-  service = [[RTGRouteGuide alloc] initWithHost:kHostAddress];
+  _service = [[RTGRouteGuide alloc] initWithHost:kHostAddress];
 }
 
 - (void)viewDidAppear:(BOOL)animated {
@@ -261,7 +262,7 @@ static NSString * const kHostAddress = @"localhost:50051";
  * the server.
  */
 @interface RouteChatViewController : UIViewController {
-  RTGRouteGuide *service;
+  RTGRouteGuide *_service;
 }
 @property (weak, nonatomic) IBOutlet UILabel *outputLabel;
 
@@ -279,7 +280,7 @@ static NSString * const kHostAddress = @"localhost:50051";
     return note;
   }];
 
-  [service routeChatWithRequestsWriter:notesWriter
+  [_service routeChatWithRequestsWriter:notesWriter
                           eventHandler:^(BOOL done, RTGRouteNote *note, NSError *error) {
     if (note) {
       NSString *str =[NSString stringWithFormat:@"%@\nGot message %@ at %@",
@@ -300,7 +301,7 @@ static NSString * const kHostAddress = @"localhost:50051";
 - (void)viewDidLoad {
   [super viewDidLoad];
 
-  service = [[RTGRouteGuide alloc] initWithHost:kHostAddress];
+  _service = [[RTGRouteGuide alloc] initWithHost:kHostAddress];
 }
 
 - (void)viewDidAppear:(BOOL)animated {

From d139da8b9a9c482a83b23c926690f01b49025640 Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Thu, 23 Jun 2016 10:37:21 -0700
Subject: [PATCH 184/280] Remove unnecessary changes

---
 tools/run_tests/run_tests.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 2a404df0d41..532f7187408 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -425,7 +425,7 @@ class PythonLanguage(object):
     return []
 
   def build_steps(self):
-    return [['tools/run_tests/build_python.sh', tox_env]
+    return [['tools/run_tests/build_python.sh', tox_env] 
             for tox_env in self._tox_envs]
 
   def post_tests_steps(self):

From 83a6a828b047cc24922a6d143e30f4ab6eb63239 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Thu, 23 Jun 2016 11:33:13 -0700
Subject: [PATCH 185/280] Fixed error messages for C++ interop client.

---
 test/cpp/interop/interop_client.cc | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/test/cpp/interop/interop_client.cc b/test/cpp/interop/interop_client.cc
index 89f841dbe96..ec0729d9c5d 100644
--- a/test/cpp/interop/interop_client.cc
+++ b/test/cpp/interop/interop_client.cc
@@ -451,7 +451,7 @@ bool InteropClient::DoResponseStreaming() {
     // most likely due to connection failure.
     gpr_log(GPR_ERROR,
             "DoResponseStreaming(): Read fewer streams (%d) than "
-            "response_stream_sizes.size() (%" PRIuPTR ")",
+            "response_stream_sizes.size() (%zu)",
             i, response_stream_sizes.size());
     return TransientFailureOrAbort();
   }
@@ -576,11 +576,10 @@ bool InteropClient::DoServerCompressedStreaming() {
   if (k < sizes.size()) {
     // stream->Read() failed before reading all the expected messages. This
     // is most likely due to a connection failure.
-    gpr_log(GPR_ERROR, "%s(): Responses read (k=%" PRIuPTR
-                       ") is "
-                       "less than the expected messages (i.e "
-                       "response_stream_sizes.size() (%" PRIuPTR ")).",
-            __func__, k, response_stream_sizes.size());
+    gpr_log(GPR_ERROR,
+            "%s(): Responses read (k=%zu) is less than the expected number of "
+            "messages (%zu).",
+            __func__, k, sizes.size());
     return TransientFailureOrAbort();
   }
 
@@ -665,7 +664,7 @@ bool InteropClient::DoHalfDuplex() {
     // most likely due to a connection failure
     gpr_log(GPR_ERROR,
             "DoHalfDuplex(): Responses read (i=%d) are less than the expected "
-            "number of messages response_stream_sizes.size() (%" PRIuPTR ")",
+            "number of messages response_stream_sizes.size() (%zu)",
             i, response_stream_sizes.size());
     return TransientFailureOrAbort();
   }

From a4b34c290d5f91866a3eff2f9793c00eb12f16f0 Mon Sep 17 00:00:00 2001
From: Ken Payson <kpayson@google.com>
Date: Wed, 22 Jun 2016 15:31:15 -0700
Subject: [PATCH 186/280] Changed %lld to use mingw supported PRId64

---
 src/core/ext/client_config/channel_connectivity.c      |  6 +++---
 src/core/lib/profiling/basic_timers.c                  |  4 ++--
 .../lib/security/credentials/jwt/jwt_credentials.c     |  4 ++--
 src/core/lib/surface/channel.c                         | 10 +++++-----
 src/core/lib/surface/completion_queue.c                |  8 ++++----
 src/core/lib/transport/transport_op_string.c           |  4 ++--
 6 files changed, 18 insertions(+), 18 deletions(-)

diff --git a/src/core/ext/client_config/channel_connectivity.c b/src/core/ext/client_config/channel_connectivity.c
index 20c01a9a7cf..2fd8e0e1232 100644
--- a/src/core/ext/client_config/channel_connectivity.c
+++ b/src/core/ext/client_config/channel_connectivity.c
@@ -189,10 +189,10 @@ void grpc_channel_watch_connectivity_state(
   GRPC_API_TRACE(
       "grpc_channel_watch_connectivity_state("
       "channel=%p, last_observed_state=%d, "
-      "deadline=gpr_timespec { tv_sec: %lld, tv_nsec: %d, clock_type: %d }, "
+      "deadline=gpr_timespec { tv_sec: %"PRId64", tv_nsec: %d, clock_type: %d }, "
       "cq=%p, tag=%p)",
-      7, (channel, (int)last_observed_state, (long long)deadline.tv_sec,
-          (int)deadline.tv_nsec, (int)deadline.clock_type, cq, tag));
+      7, (channel, (int)last_observed_state, deadline.tv_sec,
+          deadline.tv_nsec, (int)deadline.clock_type, cq, tag));
 
   grpc_cq_begin_op(cq, tag);
 
diff --git a/src/core/lib/profiling/basic_timers.c b/src/core/lib/profiling/basic_timers.c
index 50082cd7ee4..ee464f310f4 100644
--- a/src/core/lib/profiling/basic_timers.c
+++ b/src/core/lib/profiling/basic_timers.c
@@ -141,9 +141,9 @@ static void write_log(gpr_timer_log *log) {
       entry->tm = gpr_time_0(entry->tm.clock_type);
     }
     fprintf(output_file,
-            "{\"t\": %lld.%09d, \"thd\": \"%d\", \"type\": \"%c\", \"tag\": "
+            "{\"t\": %"PRId64".%09d, \"thd\": \"%d\", \"type\": \"%c\", \"tag\": "
             "\"%s\", \"file\": \"%s\", \"line\": %d, \"imp\": %d}\n",
-            (long long)entry->tm.tv_sec, (int)entry->tm.tv_nsec, entry->thd,
+            entry->tm.tv_sec, entry->tm.tv_nsec, entry->thd,
             entry->type, entry->tagstr, entry->file, entry->line,
             entry->important);
   }
diff --git a/src/core/lib/security/credentials/jwt/jwt_credentials.c b/src/core/lib/security/credentials/jwt/jwt_credentials.c
index 973fb75eaab..f4dd9208610 100644
--- a/src/core/lib/security/credentials/jwt/jwt_credentials.c
+++ b/src/core/lib/security/credentials/jwt/jwt_credentials.c
@@ -149,10 +149,10 @@ grpc_call_credentials *grpc_service_account_jwt_access_credentials_create(
       "grpc_service_account_jwt_access_credentials_create("
       "json_key=%s, "
       "token_lifetime="
-      "gpr_timespec { tv_sec: %lld, tv_nsec: %d, clock_type: %d }, "
+      "gpr_timespec { tv_sec: %"PRId64", tv_nsec: %d, clock_type: %d }, "
       "reserved=%p)",
       5,
-      (json_key, (long long)token_lifetime.tv_sec, (int)token_lifetime.tv_nsec,
+      (json_key, token_lifetime.tv_sec, token_lifetime.tv_nsec,
        (int)token_lifetime.clock_type, reserved));
   GPR_ASSERT(reserved == NULL);
   return grpc_service_account_jwt_access_credentials_create_from_auth_json_key(
diff --git a/src/core/lib/surface/channel.c b/src/core/lib/surface/channel.c
index 8936e7164f4..952a769de1d 100644
--- a/src/core/lib/surface/channel.c
+++ b/src/core/lib/surface/channel.c
@@ -223,10 +223,10 @@ grpc_call *grpc_channel_create_call(grpc_channel *channel,
       "grpc_channel_create_call("
       "channel=%p, parent_call=%p, propagation_mask=%x, cq=%p, method=%s, "
       "host=%s, "
-      "deadline=gpr_timespec { tv_sec: %lld, tv_nsec: %d, clock_type: %d }, "
+      "deadline=gpr_timespec { tv_sec: %"PRId64", tv_nsec: %d, clock_type: %d }, "
       "reserved=%p)",
       10, (channel, parent_call, (unsigned)propagation_mask, cq, method, host,
-           (long long)deadline.tv_sec, (int)deadline.tv_nsec,
+           deadline.tv_sec, deadline.tv_nsec,
            (int)deadline.clock_type, reserved));
   GPR_ASSERT(!reserved);
   return grpc_channel_create_call_internal(
@@ -282,11 +282,11 @@ grpc_call *grpc_channel_create_registered_call(
       "grpc_channel_create_registered_call("
       "channel=%p, parent_call=%p, propagation_mask=%x, completion_queue=%p, "
       "registered_call_handle=%p, "
-      "deadline=gpr_timespec { tv_sec: %lld, tv_nsec: %d, clock_type: %d }, "
+      "deadline=gpr_timespec { tv_sec: %"PRId64", tv_nsec: %d, clock_type: %d }, "
       "reserved=%p)",
       9, (channel, parent_call, (unsigned)propagation_mask, completion_queue,
-          registered_call_handle, (long long)deadline.tv_sec,
-          (int)deadline.tv_nsec, (int)deadline.clock_type, reserved));
+          registered_call_handle, deadline.tv_sec,
+          deadline.tv_nsec, (int)deadline.clock_type, reserved));
   GPR_ASSERT(!reserved);
   return grpc_channel_create_call_internal(
       channel, parent_call, propagation_mask, completion_queue, NULL,
diff --git a/src/core/lib/surface/completion_queue.c b/src/core/lib/surface/completion_queue.c
index 2cc6aa74e02..aa35ae02fe2 100644
--- a/src/core/lib/surface/completion_queue.c
+++ b/src/core/lib/surface/completion_queue.c
@@ -316,9 +316,9 @@ grpc_event grpc_completion_queue_next(grpc_completion_queue *cc,
   GRPC_API_TRACE(
       "grpc_completion_queue_next("
       "cc=%p, "
-      "deadline=gpr_timespec { tv_sec: %lld, tv_nsec: %d, clock_type: %d }, "
+      "deadline=gpr_timespec { tv_sec: %"PRId64", tv_nsec: %d, clock_type: %d }, "
       "reserved=%p)",
-      5, (cc, (long long)deadline.tv_sec, (int)deadline.tv_nsec,
+      5, (cc, deadline.tv_sec, deadline.tv_nsec,
           (int)deadline.clock_type, reserved));
   GPR_ASSERT(!reserved);
 
@@ -428,9 +428,9 @@ grpc_event grpc_completion_queue_pluck(grpc_completion_queue *cc, void *tag,
   GRPC_API_TRACE(
       "grpc_completion_queue_pluck("
       "cc=%p, tag=%p, "
-      "deadline=gpr_timespec { tv_sec: %lld, tv_nsec: %d, clock_type: %d }, "
+      "deadline=gpr_timespec { tv_sec: %"PRId64", tv_nsec: %d, clock_type: %d }, "
       "reserved=%p)",
-      6, (cc, tag, (long long)deadline.tv_sec, (int)deadline.tv_nsec,
+      6, (cc, tag, deadline.tv_sec, deadline.tv_nsec,
           (int)deadline.clock_type, reserved));
   GPR_ASSERT(!reserved);
 
diff --git a/src/core/lib/transport/transport_op_string.c b/src/core/lib/transport/transport_op_string.c
index df04c611270..d8fae7805e4 100644
--- a/src/core/lib/transport/transport_op_string.c
+++ b/src/core/lib/transport/transport_op_string.c
@@ -63,8 +63,8 @@ static void put_metadata_list(gpr_strvec *b, grpc_metadata_batch md) {
   }
   if (gpr_time_cmp(md.deadline, gpr_inf_future(md.deadline.clock_type)) != 0) {
     char *tmp;
-    gpr_asprintf(&tmp, " deadline=%lld.%09d", (long long)md.deadline.tv_sec,
-                 (int)md.deadline.tv_nsec);
+    gpr_asprintf(&tmp, " deadline=%"PRId64".%09d", md.deadline.tv_sec,
+                 md.deadline.tv_nsec);
     gpr_strvec_add(b, tmp);
   }
 }

From fe754b4e996415300ff29b6e4c378d3d5704852a Mon Sep 17 00:00:00 2001
From: Ken Payson <kpayson@google.com>
Date: Thu, 23 Jun 2016 12:32:07 -0700
Subject: [PATCH 187/280] Use GRPC_PYTHON_CFLAGS/GRPC_PYTHON_LDFLAGS in
 setup.py.

This is needed for building grpcio with mingw, see
https://github.com/grpc/grpc/pull/7012.
---
 setup.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/setup.py b/setup.py
index f73501b8b35..7e625b937a7 100644
--- a/setup.py
+++ b/setup.py
@@ -31,6 +31,7 @@
 
 import os
 import os.path
+import shlex
 import shutil
 import sys
 import sysconfig
@@ -99,8 +100,9 @@ if not "win32" in sys.platform:
 
 DEFINE_MACROS = (('OPENSSL_NO_ASM', 1), ('_WIN32_WINNT', 0x600), ('GPR_BACKWARDS_COMPATIBILITY_MODE', 1),)
 
-LDFLAGS = ()
-CFLAGS = ()
+LDFLAGS = shlex.split(os.environ.get('GRPC_PYTHON_LDFLAGS', ''))
+CFLAGS = shlex.split(os.environ.get('GRPC_PYTHON_CFLAGS', ''))
+
 if "linux" in sys.platform:
   LDFLAGS += ('-Wl,-wrap,memcpy',)
 if "linux" in sys.platform or "darwin" in sys.platform:

From 51d4f0194963e60cca2e28c08a53070f2135b4f0 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Thu, 23 Jun 2016 13:01:43 -0700
Subject: [PATCH 188/280] prevent race between grpcsharp_server_request_call
 and grpc_completion_queue_shutdown

---
 .../Grpc.Core/Internal/ServerSafeHandle.cs    | 23 +++++++++++++------
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/src/csharp/Grpc.Core/Internal/ServerSafeHandle.cs b/src/csharp/Grpc.Core/Internal/ServerSafeHandle.cs
index 85813027064..014a8db78f2 100644
--- a/src/csharp/Grpc.Core/Internal/ServerSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/ServerSafeHandle.cs
@@ -54,7 +54,10 @@ namespace Grpc.Core.Internal
 
         public void RegisterCompletionQueue(CompletionQueueSafeHandle cq)
         {
-            Native.grpcsharp_server_register_completion_queue(this, cq);
+            using (cq.NewScope())
+            {
+                Native.grpcsharp_server_register_completion_queue(this, cq);
+            }
         }
 
         public int AddInsecurePort(string addr)
@@ -74,16 +77,22 @@ namespace Grpc.Core.Internal
     
         public void ShutdownAndNotify(BatchCompletionDelegate callback, CompletionQueueSafeHandle completionQueue)
         {
-            var ctx = BatchContextSafeHandle.Create();
-            completionQueue.CompletionRegistry.RegisterBatchCompletion(ctx, callback);
-            Native.grpcsharp_server_shutdown_and_notify_callback(this, completionQueue, ctx);
+            using (completionQueue.NewScope())
+            {
+                var ctx = BatchContextSafeHandle.Create();
+                completionQueue.CompletionRegistry.RegisterBatchCompletion(ctx, callback);
+                Native.grpcsharp_server_shutdown_and_notify_callback(this, completionQueue, ctx);
+            }
         }
 
         public void RequestCall(BatchCompletionDelegate callback, CompletionQueueSafeHandle completionQueue)
         {
-            var ctx = BatchContextSafeHandle.Create();
-            completionQueue.CompletionRegistry.RegisterBatchCompletion(ctx, callback);
-            Native.grpcsharp_server_request_call(this, completionQueue, ctx).CheckOk();
+            using (completionQueue.NewScope())
+            {
+                var ctx = BatchContextSafeHandle.Create();
+                completionQueue.CompletionRegistry.RegisterBatchCompletion(ctx, callback);
+                Native.grpcsharp_server_request_call(this, completionQueue, ctx).CheckOk();
+            }
         }
 
         protected override bool ReleaseHandle()

From abd285aed813ff55329e76a9dc19eb3a1bc86166 Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@google.com>
Date: Thu, 23 Jun 2016 13:30:19 -0700
Subject: [PATCH 189/280] Added missing todo and moved _service

To Implementation
---
 .../objective-c/route_guide/ViewControllers.m | 28 ++++++++++---------
 1 file changed, 15 insertions(+), 13 deletions(-)

diff --git a/examples/objective-c/route_guide/ViewControllers.m b/examples/objective-c/route_guide/ViewControllers.m
index a5c03e9cfca..26ca9d6220b 100644
--- a/examples/objective-c/route_guide/ViewControllers.m
+++ b/examples/objective-c/route_guide/ViewControllers.m
@@ -80,13 +80,14 @@ static NSString * const kHostAddress = @"localhost:50051";
  * Run the getFeature demo. Calls getFeature with a point known to have a feature and a point known
  * not to have a feature.
  */
-@interface GetFeatureViewController : UIViewController {
-  RTGRouteGuide *_service;
-}
+@interface GetFeatureViewController : UIViewController
+
 @property (weak, nonatomic) IBOutlet UILabel *outputLabel;
+
 @end
 
 @implementation GetFeatureViewController
+RTGRouteGuide *_service;
 
 - (void)execRequest {
   void (^handler)(RTGFeature *response, NSError *error) = ^(RTGFeature *response, NSError *error) {
@@ -139,14 +140,14 @@ static NSString * const kHostAddress = @"localhost:50051";
  * Run the listFeatures demo. Calls listFeatures with a rectangle containing all of the features in
  * the pre-generated database. Prints each response as it comes in.
  */
-@interface ListFeaturesViewController : UIViewController {
-  RTGRouteGuide *_service;
-}
+@interface ListFeaturesViewController : UIViewController
+
 @property (weak, nonatomic) IBOutlet UILabel *outputLabel;
 
 @end
 
 @implementation ListFeaturesViewController
+RTGRouteGuide *_service;
 
 - (void)execRequest {
   RTGRectangle *rectangle = [RTGRectangle message];
@@ -193,14 +194,14 @@ static NSString * const kHostAddress = @"localhost:50051";
  * database with a variable delay in between. Prints the statistics when they are sent from the
  * server.
  */
-@interface RecordRouteViewController : UIViewController {
-  RTGRouteGuide *_service;
-}
+@interface RecordRouteViewController : UIViewController
+
 @property (weak, nonatomic) IBOutlet UILabel *outputLabel;
 
 @end
 
 @implementation RecordRouteViewController
+RTGRouteGuide *_service;
 
 - (void)execRequest {
   NSString *dataBasePath = [NSBundle.mainBundle pathForResource:@"route_guide_db"
@@ -233,7 +234,7 @@ static NSString * const kHostAddress = @"localhost:50051";
       NSLog(@"It took %i seconds", response.elapsedTime);
     } else {
       NSString *str =[NSString stringWithFormat:@"%@\nRPC error: %@", self.outputLabel.text, error];
-      self.outputLabel.text = str; 
+      self.outputLabel.text = str;
       NSLog(@"RPC error: %@", error);
     }
   }];
@@ -261,14 +262,14 @@ static NSString * const kHostAddress = @"localhost:50051";
  * Run the routeChat demo. Send some chat messages, and print any chat messages that are sent from
  * the server.
  */
-@interface RouteChatViewController : UIViewController {
-  RTGRouteGuide *_service;
-}
+@interface RouteChatViewController : UIViewController
+
 @property (weak, nonatomic) IBOutlet UILabel *outputLabel;
 
 @end
 
 @implementation RouteChatViewController
+RTGRouteGuide *_service;
 
 - (void)execRequest {
   NSArray *notes = @[[RTGRouteNote noteWithMessage:@"First message" latitude:0 longitude:0],
@@ -305,6 +306,7 @@ static NSString * const kHostAddress = @"localhost:50051";
 }
 
 - (void)viewDidAppear:(BOOL)animated {
+  // TODO(makarandd): Set these properties through UI builder
   self.outputLabel.text = @"RPC log:";
   self.outputLabel.numberOfLines = 0;
   self.outputLabel.font = [UIFont fontWithName:@"Helvetica Neue" size:8.0];

From f0f70a8a68c107f9fcff2dd35867fd762c2c13d6 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Thu, 23 Jun 2016 13:55:06 -0700
Subject: [PATCH 190/280] Make transport-level errors be reflected in status
 messages on calls

Allows us to eliminate logging those errors by default (since they are explicitly passed up to the application).

Required plumbing errors through the stack a little more deeply than we
had previously.
---
 .../client_config/subchannel_call_holder.c    |   7 +-
 .../chttp2/transport/chttp2_transport.c       | 229 +++++++++++-------
 .../ext/transport/chttp2/transport/internal.h |   3 -
 src/core/lib/channel/channel_stack.c          |   2 +-
 src/core/lib/iomgr/error.c                    |  14 ++
 src/core/lib/iomgr/error.h                    |  16 +-
 .../security/transport/client_auth_filter.c   |   3 +-
 src/core/lib/surface/call.c                   | 105 ++++----
 src/core/lib/surface/completion_queue.c       |   2 +-
 src/core/lib/transport/transport.c            |  65 ++---
 src/core/lib/transport/transport.h            |   9 +-
 src/core/lib/transport/transport_op_string.c  |  15 +-
 12 files changed, 279 insertions(+), 191 deletions(-)

diff --git a/src/core/ext/client_config/subchannel_call_holder.c b/src/core/ext/client_config/subchannel_call_holder.c
index e31800edd98..b96a0ad0937 100644
--- a/src/core/ext/client_config/subchannel_call_holder.c
+++ b/src/core/ext/client_config/subchannel_call_holder.c
@@ -120,16 +120,13 @@ retry:
     return;
   }
   /* if this is a cancellation, then we can raise our cancelled flag */
-  if (op->cancel_with_status != GRPC_STATUS_OK) {
+  if (op->cancel_error != GRPC_ERROR_NONE) {
     if (!gpr_atm_rel_cas(&holder->subchannel_call, 0, 1)) {
       goto retry;
     } else {
       switch (holder->creation_phase) {
         case GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING:
-          fail_locked(exec_ctx, holder,
-                      grpc_error_set_int(GRPC_ERROR_CREATE("Cancelled"),
-                                         GRPC_ERROR_INT_GRPC_STATUS,
-                                         op->cancel_with_status));
+          fail_locked(exec_ctx, holder, GRPC_ERROR_REF(op->cancel_error));
           break;
         case GRPC_SUBCHANNEL_CALL_HOLDER_PICKING_SUBCHANNEL:
           holder->pick_subchannel(exec_ctx, holder->pick_subchannel_arg, NULL,
diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.c b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
index 9c99ff883af..f34ab98b036 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.c
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
@@ -106,14 +106,12 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx,
 static void cancel_from_api(grpc_exec_ctx *exec_ctx,
                             grpc_chttp2_transport_global *transport_global,
                             grpc_chttp2_stream_global *stream_global,
-                            grpc_status_code status,
-                            gpr_slice *optional_message);
+                            grpc_error *error);
 
 static void close_from_api(grpc_exec_ctx *exec_ctx,
                            grpc_chttp2_transport_global *transport_global,
                            grpc_chttp2_stream_global *stream_global,
-                           grpc_status_code status,
-                           gpr_slice *optional_message);
+                           grpc_error *error);
 
 /** Add endpoint from this transport to pollset */
 static void add_to_pollset_locked(grpc_exec_ctx *exec_ctx,
@@ -163,8 +161,6 @@ static void destruct_transport(grpc_exec_ctx *exec_ctx,
 
   GPR_ASSERT(t->ep == NULL);
 
-  gpr_slice_unref(t->optional_drop_message);
-
   gpr_slice_buffer_destroy(&t->global.qbuf);
 
   gpr_slice_buffer_destroy(&t->writing.outbuf);
@@ -266,7 +262,6 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
       is_client ? GRPC_DTS_FH_0 : GRPC_DTS_CLIENT_PREFIX_0;
   t->parsing.is_first_frame = true;
   t->writing.is_client = is_client;
-  t->optional_drop_message = gpr_empty_slice();
   grpc_connectivity_state_init(
       &t->channel_callback.state_tracker, GRPC_CHANNEL_READY,
       is_client ? "client_transport" : "server_transport");
@@ -876,7 +871,9 @@ static void maybe_start_some_streams(
          grpc_chttp2_list_pop_waiting_for_concurrency(transport_global,
                                                       &stream_global)) {
     cancel_from_api(exec_ctx, transport_global, stream_global,
-                    GRPC_STATUS_UNAVAILABLE, NULL);
+                    grpc_error_set_int(
+                        GRPC_ERROR_CREATE("Stream IDs exhausted"),
+                        GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_UNAVAILABLE));
   }
 }
 
@@ -958,14 +955,14 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx,
     on_complete->next_data.scratch |= CLOSURE_BARRIER_STATS_BIT;
   }
 
-  if (op->cancel_with_status != GRPC_STATUS_OK) {
+  if (op->cancel_error != GRPC_ERROR_NONE) {
     cancel_from_api(exec_ctx, transport_global, stream_global,
-                    op->cancel_with_status, op->optional_close_message);
+                    GRPC_ERROR_REF(op->cancel_error));
   }
 
-  if (op->close_with_status != GRPC_STATUS_OK) {
+  if (op->close_error != GRPC_ERROR_NONE) {
     close_from_api(exec_ctx, transport_global, stream_global,
-                   op->close_with_status, op->optional_close_message);
+                   GRPC_ERROR_REF(op->close_error));
   }
 
   if (op->send_initial_metadata != NULL) {
@@ -979,12 +976,16 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx,
         transport_global->settings[GRPC_PEER_SETTINGS]
                                   [GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE];
     if (metadata_size > metadata_peer_limit) {
-      gpr_log(GPR_DEBUG,
-              "to-be-sent initial metadata size exceeds peer limit "
-              "(%" PRIuPTR " vs. %" PRIuPTR ")",
-              metadata_size, metadata_peer_limit);
-      cancel_from_api(exec_ctx, transport_global, stream_global,
-                      GRPC_STATUS_RESOURCE_EXHAUSTED, NULL);
+      cancel_from_api(
+          exec_ctx, transport_global, stream_global,
+          grpc_error_set_int(
+              grpc_error_set_int(
+                  grpc_error_set_int(
+                      GRPC_ERROR_CREATE("to-be-sent initial metadata size "
+                                        "exceeds peer limit"),
+                      GRPC_ERROR_INT_SIZE, (intptr_t)metadata_size),
+                  GRPC_ERROR_INT_LIMIT, (intptr_t)metadata_peer_limit),
+              GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_RESOURCE_EXHAUSTED));
     } else {
       if (contains_non_ok_status(transport_global, op->send_initial_metadata)) {
         stream_global->seen_error = true;
@@ -1038,12 +1039,16 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx,
         transport_global->settings[GRPC_PEER_SETTINGS]
                                   [GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE];
     if (metadata_size > metadata_peer_limit) {
-      gpr_log(GPR_DEBUG,
-              "to-be-sent trailing metadata size exceeds peer limit "
-              "(%" PRIuPTR " vs. %" PRIuPTR ")",
-              metadata_size, metadata_peer_limit);
-      cancel_from_api(exec_ctx, transport_global, stream_global,
-                      GRPC_STATUS_RESOURCE_EXHAUSTED, NULL);
+      cancel_from_api(
+          exec_ctx, transport_global, stream_global,
+          grpc_error_set_int(
+              grpc_error_set_int(
+                  grpc_error_set_int(
+                      GRPC_ERROR_CREATE("to-be-sent trailing metadata size "
+                                        "exceeds peer limit"),
+                      GRPC_ERROR_INT_SIZE, (intptr_t)metadata_size),
+                  GRPC_ERROR_INT_LIMIT, (intptr_t)metadata_peer_limit),
+              GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_RESOURCE_EXHAUSTED));
     } else {
       if (contains_non_ok_status(transport_global,
                                  op->send_trailing_metadata)) {
@@ -1235,8 +1240,12 @@ static void check_read_ops(grpc_exec_ctx *exec_ctx,
           incoming_byte_stream_destroy_locked(exec_ctx, NULL, NULL, bs);
         }
         if (stream_global->exceeded_metadata_size) {
-          cancel_from_api(exec_ctx, transport_global, stream_global,
-                          GRPC_STATUS_RESOURCE_EXHAUSTED, NULL);
+          cancel_from_api(
+              exec_ctx, transport_global, stream_global,
+              grpc_error_set_int(
+                  GRPC_ERROR_CREATE(
+                      "received initial metadata size exceeds limit"),
+                  GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_RESOURCE_EXHAUSTED));
         }
       }
       grpc_chttp2_incoming_metadata_buffer_publish(
@@ -1275,8 +1284,12 @@ static void check_read_ops(grpc_exec_ctx *exec_ctx,
           incoming_byte_stream_destroy_locked(exec_ctx, NULL, NULL, bs);
         }
         if (stream_global->exceeded_metadata_size) {
-          cancel_from_api(exec_ctx, transport_global, stream_global,
-                          GRPC_STATUS_RESOURCE_EXHAUSTED, NULL);
+          cancel_from_api(
+              exec_ctx, transport_global, stream_global,
+              grpc_error_set_int(
+                  GRPC_ERROR_CREATE(
+                      "received trailing metadata size exceeds limit"),
+                  GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_RESOURCE_EXHAUSTED));
         }
       }
       if (stream_global->all_incoming_byte_streams_finished) {
@@ -1340,35 +1353,67 @@ static void remove_stream(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
   GRPC_ERROR_UNREF(error);
 }
 
+static void status_codes_from_error(grpc_error *error,
+                                    grpc_chttp2_error_code *http2_error,
+                                    grpc_status_code *grpc_status) {
+  intptr_t ip_http;
+  intptr_t ip_grpc;
+  bool have_http =
+      grpc_error_get_int(error, GRPC_ERROR_INT_HTTP2_ERROR, &ip_http);
+  bool have_grpc =
+      grpc_error_get_int(error, GRPC_ERROR_INT_GRPC_STATUS, &ip_grpc);
+  if (have_http) {
+    *http2_error = (grpc_chttp2_error_code)ip_http;
+  } else if (have_grpc) {
+    *http2_error =
+        grpc_chttp2_grpc_status_to_http2_error((grpc_status_code)ip_grpc);
+  } else {
+    *http2_error = GRPC_CHTTP2_INTERNAL_ERROR;
+  }
+  if (have_grpc) {
+    *grpc_status = (grpc_status_code)ip_grpc;
+  } else if (have_http) {
+    *grpc_status =
+        grpc_chttp2_http2_error_to_grpc_status((grpc_chttp2_error_code)ip_http);
+  } else {
+    *grpc_status = GRPC_STATUS_INTERNAL;
+  }
+}
+
 static void cancel_from_api(grpc_exec_ctx *exec_ctx,
                             grpc_chttp2_transport_global *transport_global,
                             grpc_chttp2_stream_global *stream_global,
-                            grpc_status_code status,
-                            gpr_slice *optional_message) {
+                            grpc_error *due_to_error) {
   if (!stream_global->read_closed || !stream_global->write_closed) {
+    grpc_status_code grpc_status;
+    grpc_chttp2_error_code http_error;
+    status_codes_from_error(due_to_error, &http_error, &grpc_status);
+
     if (stream_global->id != 0) {
       gpr_slice_buffer_add(
           &transport_global->qbuf,
-          grpc_chttp2_rst_stream_create(
-              stream_global->id,
-              (uint32_t)grpc_chttp2_grpc_status_to_http2_error(status),
-              &stream_global->stats.outgoing));
+          grpc_chttp2_rst_stream_create(stream_global->id, (uint32_t)http_error,
+                                        &stream_global->stats.outgoing));
     }
 
-    if (optional_message) {
-      gpr_slice_ref(*optional_message);
+    const char *msg =
+        grpc_error_get_str(due_to_error, GRPC_ERROR_STR_GRPC_MESSAGE);
+    bool free_msg = false;
+    if (msg == NULL) {
+      free_msg = true;
+      msg = grpc_error_string(due_to_error);
     }
-    grpc_chttp2_fake_status(exec_ctx, transport_global, stream_global, status,
-                            optional_message);
+    gpr_slice msg_slice = gpr_slice_from_copied_string(msg);
+    grpc_chttp2_fake_status(exec_ctx, transport_global, stream_global,
+                            grpc_status, &msg_slice);
+    if (free_msg) grpc_error_free_string(msg);
   }
-  if (status != GRPC_STATUS_OK && !stream_global->seen_error) {
+  if (due_to_error != GRPC_ERROR_NONE && !stream_global->seen_error) {
     stream_global->seen_error = true;
     grpc_chttp2_list_add_check_read_ops(transport_global, stream_global);
   }
-  grpc_chttp2_mark_stream_closed(
-      exec_ctx, transport_global, stream_global, 1, 1,
-      grpc_error_set_int(GRPC_ERROR_CREATE("Cancelled"),
-                         GRPC_ERROR_INT_GRPC_STATUS, status));
+  grpc_chttp2_mark_stream_closed(exec_ctx, transport_global, stream_global, 1,
+                                 1, due_to_error);
 }
 
 void grpc_chttp2_fake_status(grpc_exec_ctx *exec_ctx,
@@ -1469,15 +1514,17 @@ void grpc_chttp2_mark_stream_closed(
 static void close_from_api(grpc_exec_ctx *exec_ctx,
                            grpc_chttp2_transport_global *transport_global,
                            grpc_chttp2_stream_global *stream_global,
-                           grpc_status_code status,
-                           gpr_slice *optional_message) {
+                           grpc_error *error) {
   gpr_slice hdr;
   gpr_slice status_hdr;
   gpr_slice message_pfx;
   uint8_t *p;
   uint32_t len = 0;
+  grpc_status_code grpc_status;
+  grpc_chttp2_error_code http_error;
+  status_codes_from_error(error, &http_error, &grpc_status);
 
-  GPR_ASSERT(status >= 0 && (int)status < 100);
+  GPR_ASSERT(grpc_status >= 0 && (int)grpc_status < 100);
 
   if (stream_global->id != 0 && !transport_global->is_client) {
     /* Hand roll a header block.
@@ -1487,7 +1534,7 @@ static void close_from_api(grpc_exec_ctx *exec_ctx,
        time we got around to sending this, so instead we ignore HPACK
        compression
        and just write the uncompressed bytes onto the wire. */
-    status_hdr = gpr_slice_malloc(15 + (status >= 10));
+    status_hdr = gpr_slice_malloc(15 + (grpc_status >= 10));
     p = GPR_SLICE_START_PTR(status_hdr);
     *p++ = 0x40; /* literal header */
     *p++ = 11;   /* len(grpc-status) */
@@ -1502,19 +1549,23 @@ static void close_from_api(grpc_exec_ctx *exec_ctx,
     *p++ = 't';
     *p++ = 'u';
     *p++ = 's';
-    if (status < 10) {
+    if (grpc_status < 10) {
       *p++ = 1;
-      *p++ = (uint8_t)('0' + status);
+      *p++ = (uint8_t)('0' + grpc_status);
     } else {
       *p++ = 2;
-      *p++ = (uint8_t)('0' + (status / 10));
-      *p++ = (uint8_t)('0' + (status % 10));
+      *p++ = (uint8_t)('0' + (grpc_status / 10));
+      *p++ = (uint8_t)('0' + (grpc_status % 10));
     }
     GPR_ASSERT(p == GPR_SLICE_END_PTR(status_hdr));
     len += (uint32_t)GPR_SLICE_LENGTH(status_hdr);
 
-    if (optional_message) {
-      GPR_ASSERT(GPR_SLICE_LENGTH(*optional_message) < 127);
+    const char *optional_message =
+        grpc_error_get_str(error, GRPC_ERROR_STR_GRPC_MESSAGE);
+
+    if (optional_message != NULL) {
+      size_t msg_len = strlen(optional_message);
+      GPR_ASSERT(msg_len < 127);
       message_pfx = gpr_slice_malloc(15);
       p = GPR_SLICE_START_PTR(message_pfx);
       *p++ = 0x40;
@@ -1531,10 +1582,10 @@ static void close_from_api(grpc_exec_ctx *exec_ctx,
       *p++ = 'a';
       *p++ = 'g';
       *p++ = 'e';
-      *p++ = (uint8_t)GPR_SLICE_LENGTH(*optional_message);
+      *p++ = (uint8_t)msg_len;
       GPR_ASSERT(p == GPR_SLICE_END_PTR(message_pfx));
       len += (uint32_t)GPR_SLICE_LENGTH(message_pfx);
-      len += (uint32_t)GPR_SLICE_LENGTH(*optional_message);
+      len += (uint32_t)msg_len;
     }
 
     hdr = gpr_slice_malloc(9);
@@ -1555,53 +1606,54 @@ static void close_from_api(grpc_exec_ctx *exec_ctx,
     if (optional_message) {
       gpr_slice_buffer_add(&transport_global->qbuf, message_pfx);
       gpr_slice_buffer_add(&transport_global->qbuf,
-                           gpr_slice_ref(*optional_message));
+                           gpr_slice_from_copied_string(optional_message));
     }
 
     gpr_slice_buffer_add(
         &transport_global->qbuf,
         grpc_chttp2_rst_stream_create(stream_global->id, GRPC_CHTTP2_NO_ERROR,
                                       &stream_global->stats.outgoing));
-
-    if (optional_message) {
-      gpr_slice_ref(*optional_message);
-    }
   }
 
-  grpc_chttp2_fake_status(exec_ctx, transport_global, stream_global, status,
-                          optional_message);
-  grpc_error *err = GRPC_ERROR_CREATE("Stream closed");
-  err = grpc_error_set_int(err, GRPC_ERROR_INT_GRPC_STATUS, status);
-  if (optional_message) {
-    char *str =
-        gpr_dump_slice(*optional_message, GPR_DUMP_HEX | GPR_DUMP_ASCII);
-    err = grpc_error_set_str(err, GRPC_ERROR_STR_GRPC_MESSAGE, str);
-    gpr_free(str);
+  const char *msg = grpc_error_get_str(error, GRPC_ERROR_STR_GRPC_MESSAGE);
+  bool free_msg = false;
+  if (msg == NULL) {
+    free_msg = true;
+    msg = grpc_error_string(error);
   }
+  gpr_slice msg_slice = gpr_slice_from_copied_string(msg);
+  grpc_chttp2_fake_status(exec_ctx, transport_global, stream_global,
+                          grpc_status, &msg_slice);
+  if (free_msg) grpc_error_free_string(msg);
+
   grpc_chttp2_mark_stream_closed(exec_ctx, transport_global, stream_global, 1,
-                                 1, err);
+                                 1, error);
 }
 
+typedef struct {
+  grpc_exec_ctx *exec_ctx;
+  grpc_error *error;
+} cancel_stream_cb_args;
+
 static void cancel_stream_cb(grpc_chttp2_transport_global *transport_global,
                              void *user_data,
                              grpc_chttp2_stream_global *stream_global) {
-  grpc_chttp2_transport *transport = TRANSPORT_FROM_GLOBAL(transport_global);
-  cancel_from_api(user_data, transport_global, stream_global,
-                  GRPC_STATUS_UNAVAILABLE,
-                  GPR_SLICE_IS_EMPTY(transport->optional_drop_message)
-                      ? NULL
-                      : &transport->optional_drop_message);
+  cancel_stream_cb_args *args = user_data;
+  cancel_from_api(args->exec_ctx, transport_global, stream_global,
+                  GRPC_ERROR_REF(args->error));
 }
 
-static void end_all_the_calls(grpc_exec_ctx *exec_ctx,
-                              grpc_chttp2_transport *t) {
-  grpc_chttp2_for_all_streams(&t->global, exec_ctx, cancel_stream_cb);
+static void end_all_the_calls(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
+                              grpc_error *error) {
+  cancel_stream_cb_args args = {exec_ctx, error};
+  grpc_chttp2_for_all_streams(&t->global, &args, cancel_stream_cb);
+  GRPC_ERROR_UNREF(error);
 }
 
 static void drop_connection(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
                             grpc_error *error) {
-  close_transport_locked(exec_ctx, t, error);
-  end_all_the_calls(exec_ctx, t);
+  close_transport_locked(exec_ctx, t, GRPC_ERROR_REF(error));
+  end_all_the_calls(exec_ctx, t, error);
 }
 
 /** update window from a settings change */
@@ -1708,15 +1760,7 @@ static void parsing_action(grpc_exec_ctx *exec_ctx, void *arg,
                                          t->read_buffer.slices[i]);
   };
   if (i != t->read_buffer.count) {
-    gpr_slice_unref(t->optional_drop_message);
     errors[2] = try_http_parsing(exec_ctx, t);
-    if (errors[2] != GRPC_ERROR_NONE) {
-      t->optional_drop_message = gpr_slice_from_copied_string(
-          "Connection dropped: received http1.x response");
-    } else {
-      t->optional_drop_message = gpr_slice_from_copied_string(
-          "Connection dropped: received unparseable response");
-    }
   }
   grpc_error *err =
       errors[0] == GRPC_ERROR_NONE && errors[1] == GRPC_ERROR_NONE &&
@@ -1784,6 +1828,10 @@ static void post_reading_action_locked(grpc_exec_ctx *exec_ctx,
     error = GRPC_ERROR_CREATE("Transport closed");
   }
   if (error != GRPC_ERROR_NONE) {
+    if (!grpc_error_get_int(error, GRPC_ERROR_INT_GRPC_STATUS, NULL)) {
+      error = grpc_error_set_int(error, GRPC_ERROR_INT_GRPC_STATUS,
+                                 GRPC_STATUS_UNAVAILABLE);
+    }
     drop_connection(exec_ctx, t, GRPC_ERROR_REF(error));
     t->endpoint_reading = 0;
     if (!t->executor.writing_active && t->ep) {
@@ -1798,6 +1846,7 @@ static void post_reading_action_locked(grpc_exec_ctx *exec_ctx,
     prevent_endpoint_shutdown(t);
   }
   gpr_slice_buffer_reset_and_unref(&t->read_buffer);
+  GRPC_ERROR_UNREF(error);
 
   if (keep_reading) {
     grpc_endpoint_read(exec_ctx, t->ep, &t->read_buffer, &t->reading_action);
@@ -1806,8 +1855,6 @@ static void post_reading_action_locked(grpc_exec_ctx *exec_ctx,
   } else {
     UNREF_TRANSPORT(exec_ctx, t, "reading_action");
   }
-
-  GRPC_LOG_IF_ERROR("close_transport", error);
 }
 
 /*******************************************************************************
diff --git a/src/core/ext/transport/chttp2/transport/internal.h b/src/core/ext/transport/chttp2/transport/internal.h
index d63170e350b..7e281f1b1a2 100644
--- a/src/core/ext/transport/chttp2/transport/internal.h
+++ b/src/core/ext/transport/chttp2/transport/internal.h
@@ -384,9 +384,6 @@ struct grpc_chttp2_transport {
 
   /** Transport op to be applied post-parsing */
   grpc_transport_op *post_parsing_op;
-
-  /** Message explaining the reason of dropping connection */
-  gpr_slice optional_drop_message;
 };
 
 typedef struct {
diff --git a/src/core/lib/channel/channel_stack.c b/src/core/lib/channel/channel_stack.c
index bbba85d80ba..42075b127bd 100644
--- a/src/core/lib/channel/channel_stack.c
+++ b/src/core/lib/channel/channel_stack.c
@@ -263,6 +263,6 @@ void grpc_call_element_send_cancel(grpc_exec_ctx *exec_ctx,
                                    grpc_call_element *cur_elem) {
   grpc_transport_stream_op op;
   memset(&op, 0, sizeof(op));
-  op.cancel_with_status = GRPC_STATUS_CANCELLED;
+  op.cancel_error = GRPC_ERROR_CANCELLED;
   grpc_call_next_op(exec_ctx, cur_elem, &op);
 }
diff --git a/src/core/lib/iomgr/error.c b/src/core/lib/iomgr/error.c
index 540fb4fa7e4..da0d6972360 100644
--- a/src/core/lib/iomgr/error.c
+++ b/src/core/lib/iomgr/error.c
@@ -37,6 +37,7 @@
 #include <stdbool.h>
 #include <string.h>
 
+#include <grpc/status.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/avl.h>
 #include <grpc/support/log.h>
@@ -115,6 +116,8 @@ static const char *error_int_name(grpc_error_ints key) {
       return "wsa_error";
     case GRPC_ERROR_INT_HTTP_STATUS:
       return "http_status";
+    case GRPC_ERROR_INT_LIMIT:
+      return "limit";
   }
   GPR_UNREACHABLE_CODE(return "unknown");
 }
@@ -271,6 +274,12 @@ grpc_error *grpc_error_set_int(grpc_error *src, grpc_error_ints which,
 
 bool grpc_error_get_int(grpc_error *err, grpc_error_ints which, intptr_t *p) {
   void *pp;
+  if (is_special(err)) {
+    if (err == GRPC_ERROR_CANCELLED && which == GRPC_ERROR_INT_GRPC_STATUS) {
+      return GRPC_STATUS_CANCELLED;
+    }
+    return false;
+  }
   if (gpr_avl_maybe_get(err->ints, (void *)(uintptr_t)which, &pp)) {
     if (p != NULL) *p = (intptr_t)pp;
     return true;
@@ -286,6 +295,11 @@ grpc_error *grpc_error_set_str(grpc_error *src, grpc_error_strs which,
   return new;
 }
 
+const char *grpc_error_get_str(grpc_error *err, grpc_error_strs which) {
+  if (is_special(err)) return NULL;
+  return gpr_avl_get(err->strs, (void *)(uintptr_t)which);
+}
+
 grpc_error *grpc_error_add_child(grpc_error *src, grpc_error *child) {
   grpc_error *new = copy_error_and_unref(src);
   new->errs = gpr_avl_add(new->errs, (void *)(new->next_err++), child);
diff --git a/src/core/lib/iomgr/error.h b/src/core/lib/iomgr/error.h
index 69cdf3028e4..13f898e31ad 100644
--- a/src/core/lib/iomgr/error.h
+++ b/src/core/lib/iomgr/error.h
@@ -92,6 +92,8 @@ typedef enum {
   GRPC_ERROR_INT_FD,
   /// HTTP status (i.e. 404)
   GRPC_ERROR_INT_HTTP_STATUS,
+  /// context sensitive limit associated with the error
+  GRPC_ERROR_INT_LIMIT,
 } grpc_error_ints;
 
 typedef enum {
@@ -163,23 +165,25 @@ void grpc_error_unref(grpc_error *err);
 #endif
 
 grpc_error *grpc_error_set_int(grpc_error *src, grpc_error_ints which,
-                               intptr_t value);
+                               intptr_t value) GRPC_MUST_USE_RESULT;
 bool grpc_error_get_int(grpc_error *error, grpc_error_ints which, intptr_t *p);
 grpc_error *grpc_error_set_time(grpc_error *src, grpc_error_times which,
-                                gpr_timespec value);
+                                gpr_timespec value) GRPC_MUST_USE_RESULT;
 grpc_error *grpc_error_set_str(grpc_error *src, grpc_error_strs which,
-                               const char *value);
+                               const char *value) GRPC_MUST_USE_RESULT;
+const char *grpc_error_get_str(grpc_error *error, grpc_error_strs which);
 /// Add a child error: an error that is believed to have contributed to this
 /// error occurring. Allows root causing high level errors from lower level
 /// errors that contributed to them.
-grpc_error *grpc_error_add_child(grpc_error *src, grpc_error *child);
+grpc_error *grpc_error_add_child(grpc_error *src,
+                                 grpc_error *child) GRPC_MUST_USE_RESULT;
 grpc_error *grpc_os_error(const char *file, int line, int err,
-                          const char *call_name);
+                          const char *call_name) GRPC_MUST_USE_RESULT;
 /// create an error associated with errno!=0 (an 'operating system' error)
 #define GRPC_OS_ERROR(err, call_name) \
   grpc_os_error(__FILE__, __LINE__, err, call_name)
 grpc_error *grpc_wsa_error(const char *file, int line, int err,
-                           const char *call_name);
+                           const char *call_name) GRPC_MUST_USE_RESULT;
 /// windows only: create an error associated with WSAGetLastError()!=0
 #define GRPC_WSA_ERROR(err, call_name) \
   grpc_wsa_error(__FILE__, __LINE__, err, call_name)
diff --git a/src/core/lib/security/transport/client_auth_filter.c b/src/core/lib/security/transport/client_auth_filter.c
index 76be2acd728..e053afc745c 100644
--- a/src/core/lib/security/transport/client_auth_filter.c
+++ b/src/core/lib/security/transport/client_auth_filter.c
@@ -220,8 +220,7 @@ static void auth_start_transport_op(grpc_exec_ctx *exec_ctx,
   grpc_linked_mdelem *l;
   grpc_client_security_context *sec_ctx = NULL;
 
-  if (calld->security_context_set == 0 &&
-      op->cancel_with_status == GRPC_STATUS_OK) {
+  if (calld->security_context_set == 0 && op->cancel_error == GRPC_ERROR_NONE) {
     calld->security_context_set = 1;
     GPR_ASSERT(op->context);
     if (op->context[GRPC_CONTEXT_SECURITY].value == NULL) {
diff --git a/src/core/lib/surface/call.c b/src/core/lib/surface/call.c
index 04291b0ee0a..77c17a4975b 100644
--- a/src/core/lib/surface/call.c
+++ b/src/core/lib/surface/call.c
@@ -402,8 +402,50 @@ static void set_status_code(grpc_call *call, status_source source,
 
   call->status[source].is_set = 1;
   call->status[source].code = (grpc_status_code)status;
+}
+
+static void set_status_details(grpc_call *call, status_source source,
+                               grpc_mdstr *status) {
+  if (call->status[source].details != NULL) {
+    GRPC_MDSTR_UNREF(call->status[source].details);
+  }
+  call->status[source].details = status;
+}
+
+static void get_final_status(grpc_call *call,
+                             void (*set_value)(grpc_status_code code,
+                                               void *user_data),
+                             void *set_value_user_data) {
+  int i;
+  for (i = 0; i < STATUS_SOURCE_COUNT; i++) {
+    if (call->status[i].is_set) {
+      set_value(call->status[i].code, set_value_user_data);
+      return;
+    }
+  }
+  if (call->is_client) {
+    set_value(GRPC_STATUS_UNKNOWN, set_value_user_data);
+  } else {
+    set_value(GRPC_STATUS_OK, set_value_user_data);
+  }
+}
 
-  /* TODO(ctiller): what to do about the flush that was previously here */
+static void set_status_from_error(grpc_call *call, status_source source,
+                                  grpc_error *error) {
+  intptr_t status;
+  if (grpc_error_get_int(error, GRPC_ERROR_INT_GRPC_STATUS, &status)) {
+    set_status_code(call, source, (uint32_t)status);
+  } else {
+    set_status_code(call, source, GRPC_STATUS_INTERNAL);
+  }
+  const char *msg = grpc_error_get_str(error, GRPC_ERROR_STR_GRPC_MESSAGE);
+  bool free_msg = false;
+  if (msg == NULL) {
+    free_msg = true;
+    msg = grpc_error_string(error);
+  }
+  set_status_details(call, source, grpc_mdstr_from_string(msg));
+  if (free_msg) grpc_error_free_string(msg);
 }
 
 static void set_incoming_compression_algorithm(
@@ -492,32 +534,6 @@ uint32_t grpc_call_test_only_get_encodings_accepted_by_peer(grpc_call *call) {
   return encodings_accepted_by_peer;
 }
 
-static void set_status_details(grpc_call *call, status_source source,
-                               grpc_mdstr *status) {
-  if (call->status[source].details != NULL) {
-    GRPC_MDSTR_UNREF(call->status[source].details);
-  }
-  call->status[source].details = status;
-}
-
-static void get_final_status(grpc_call *call,
-                             void (*set_value)(grpc_status_code code,
-                                               void *user_data),
-                             void *set_value_user_data) {
-  int i;
-  for (i = 0; i < STATUS_SOURCE_COUNT; i++) {
-    if (call->status[i].is_set) {
-      set_value(call->status[i].code, set_value_user_data);
-      return;
-    }
-  }
-  if (call->is_client) {
-    set_value(GRPC_STATUS_UNKNOWN, set_value_user_data);
-  } else {
-    set_value(GRPC_STATUS_OK, set_value_user_data);
-  }
-}
-
 static void get_final_details(grpc_call *call, char **out_details,
                               size_t *out_details_capacity) {
   int i;
@@ -741,8 +757,7 @@ grpc_call_error grpc_call_cancel_with_status(grpc_call *c,
 typedef struct termination_closure {
   grpc_closure closure;
   grpc_call *call;
-  grpc_status_code status;
-  gpr_slice optional_message;
+  grpc_error *error;
   grpc_closure *op_closure;
   enum { TC_CANCEL, TC_CLOSE } type;
 } termination_closure;
@@ -758,7 +773,7 @@ static void done_termination(grpc_exec_ctx *exec_ctx, void *tcp,
       GRPC_CALL_INTERNAL_UNREF(exec_ctx, tc->call, "close");
       break;
   }
-  gpr_slice_unref(tc->optional_message);
+  GRPC_ERROR_UNREF(tc->error);
   grpc_exec_ctx_sched(exec_ctx, tc->op_closure, GRPC_ERROR_NONE, NULL);
   gpr_free(tc);
 }
@@ -767,7 +782,7 @@ static void send_cancel(grpc_exec_ctx *exec_ctx, void *tcp, grpc_error *error) {
   grpc_transport_stream_op op;
   termination_closure *tc = tcp;
   memset(&op, 0, sizeof(op));
-  op.cancel_with_status = tc->status;
+  op.cancel_error = tc->error;
   /* reuse closure to catch completion */
   grpc_closure_init(&tc->closure, done_termination, tc);
   op.on_complete = &tc->closure;
@@ -778,8 +793,7 @@ static void send_close(grpc_exec_ctx *exec_ctx, void *tcp, grpc_error *error) {
   grpc_transport_stream_op op;
   termination_closure *tc = tcp;
   memset(&op, 0, sizeof(op));
-  tc->optional_message = gpr_slice_ref(tc->optional_message);
-  grpc_transport_stream_op_add_close(&op, tc->status, &tc->optional_message);
+  op.close_error = tc->error;
   /* reuse closure to catch completion */
   grpc_closure_init(&tc->closure, done_termination, tc);
   tc->op_closure = op.on_complete;
@@ -789,14 +803,7 @@ static void send_close(grpc_exec_ctx *exec_ctx, void *tcp, grpc_error *error) {
 
 static grpc_call_error terminate_with_status(grpc_exec_ctx *exec_ctx,
                                              termination_closure *tc) {
-  grpc_mdstr *details = NULL;
-  if (GPR_SLICE_LENGTH(tc->optional_message) > 0) {
-    tc->optional_message = gpr_slice_ref(tc->optional_message);
-    details = grpc_mdstr_from_slice(tc->optional_message);
-  }
-
-  set_status_code(tc->call, STATUS_FROM_API_OVERRIDE, (uint32_t)tc->status);
-  set_status_details(tc->call, STATUS_FROM_API_OVERRIDE, details);
+  set_status_from_error(tc->call, STATUS_FROM_API_OVERRIDE, tc->error);
 
   if (tc->type == TC_CANCEL) {
     grpc_closure_init(&tc->closure, send_cancel, tc);
@@ -812,13 +819,15 @@ static grpc_call_error terminate_with_status(grpc_exec_ctx *exec_ctx,
 static grpc_call_error cancel_with_status(grpc_exec_ctx *exec_ctx, grpc_call *c,
                                           grpc_status_code status,
                                           const char *description) {
+  GPR_ASSERT(status != GRPC_STATUS_OK);
   termination_closure *tc = gpr_malloc(sizeof(*tc));
   memset(tc, 0, sizeof(termination_closure));
   tc->type = TC_CANCEL;
   tc->call = c;
-  tc->optional_message = gpr_slice_from_copied_string(description);
-  GPR_ASSERT(status != GRPC_STATUS_OK);
-  tc->status = status;
+  tc->error = grpc_error_set_int(
+      grpc_error_set_str(GRPC_ERROR_CREATE(description),
+                         GRPC_ERROR_STR_GRPC_MESSAGE, description),
+      GRPC_ERROR_INT_GRPC_STATUS, status);
 
   return terminate_with_status(exec_ctx, tc);
 }
@@ -826,13 +835,15 @@ static grpc_call_error cancel_with_status(grpc_exec_ctx *exec_ctx, grpc_call *c,
 static grpc_call_error close_with_status(grpc_exec_ctx *exec_ctx, grpc_call *c,
                                          grpc_status_code status,
                                          const char *description) {
+  GPR_ASSERT(status != GRPC_STATUS_OK);
   termination_closure *tc = gpr_malloc(sizeof(*tc));
   memset(tc, 0, sizeof(termination_closure));
   tc->type = TC_CLOSE;
   tc->call = c;
-  tc->optional_message = gpr_slice_from_copied_string(description);
-  GPR_ASSERT(status != GRPC_STATUS_OK);
-  tc->status = status;
+  tc->error = grpc_error_set_int(
+      grpc_error_set_str(GRPC_ERROR_CREATE(description),
+                         GRPC_ERROR_STR_GRPC_MESSAGE, description),
+      GRPC_ERROR_INT_GRPC_STATUS, status);
 
   return terminate_with_status(exec_ctx, tc);
 }
diff --git a/src/core/lib/surface/completion_queue.c b/src/core/lib/surface/completion_queue.c
index 2cc6aa74e02..db8010ef9a1 100644
--- a/src/core/lib/surface/completion_queue.c
+++ b/src/core/lib/surface/completion_queue.c
@@ -240,7 +240,7 @@ void grpc_cq_end_op(grpc_exec_ctx *exec_ctx, grpc_completion_queue *cc,
         "grpc_cq_end_op(exec_ctx=%p, cc=%p, tag=%p, error=%s, done=%p, "
         "done_arg=%p, storage=%p)",
         7, (exec_ctx, cc, tag, errmsg, done, done_arg, storage));
-    if (grpc_trace_operation_failures) {
+    if (grpc_trace_operation_failures && error != GRPC_ERROR_NONE) {
       gpr_log(GPR_ERROR, "Operation failed: tag=%p, error=%s", tag, errmsg);
     }
     grpc_error_free_string(errmsg);
diff --git a/src/core/lib/transport/transport.c b/src/core/lib/transport/transport.c
index 1105494a85c..67920b05279 100644
--- a/src/core/lib/transport/transport.c
+++ b/src/core/lib/transport/transport.c
@@ -36,6 +36,7 @@
 #include <grpc/support/atm.h>
 #include <grpc/support/log.h>
 #include <grpc/support/sync.h>
+#include "src/core/lib/support/string.h"
 #include "src/core/lib/transport/transport_impl.h"
 
 #ifdef GRPC_STREAM_REFCOUNT_DEBUG
@@ -162,55 +163,63 @@ void grpc_transport_stream_op_finish_with_failure(grpc_exec_ctx *exec_ctx,
   grpc_exec_ctx_sched(exec_ctx, op->on_complete, error, NULL);
 }
 
-void grpc_transport_stream_op_add_cancellation(grpc_transport_stream_op *op,
-                                               grpc_status_code status) {
-  GPR_ASSERT(status != GRPC_STATUS_OK);
-  if (op->cancel_with_status == GRPC_STATUS_OK) {
-    op->cancel_with_status = status;
-  }
-  if (op->close_with_status != GRPC_STATUS_OK) {
-    op->close_with_status = GRPC_STATUS_OK;
-    if (op->optional_close_message != NULL) {
-      gpr_slice_unref(*op->optional_close_message);
-      op->optional_close_message = NULL;
-    }
-  }
-}
-
 typedef struct {
-  gpr_slice message;
+  grpc_error *error;
   grpc_closure *then_call;
   grpc_closure closure;
 } close_message_data;
 
 static void free_message(grpc_exec_ctx *exec_ctx, void *p, grpc_error *error) {
   close_message_data *cmd = p;
-  gpr_slice_unref(cmd->message);
+  GRPC_ERROR_UNREF(cmd->error);
   if (cmd->then_call != NULL) {
     cmd->then_call->cb(exec_ctx, cmd->then_call->cb_arg, GRPC_ERROR_REF(error));
   }
   gpr_free(cmd);
 }
 
+static void add_error(grpc_transport_stream_op *op, grpc_error **which,
+                      grpc_error *error) {
+  close_message_data *cmd;
+  cmd = gpr_malloc(sizeof(*cmd));
+  cmd->error = error;
+  cmd->then_call = op->on_complete;
+  grpc_closure_init(&cmd->closure, free_message, cmd);
+  op->on_complete = &cmd->closure;
+  *which = error;
+}
+
+void grpc_transport_stream_op_add_cancellation(grpc_transport_stream_op *op,
+                                               grpc_status_code status) {
+  GPR_ASSERT(status != GRPC_STATUS_OK);
+  if (op->cancel_error == GRPC_STATUS_OK) {
+    op->cancel_error = grpc_error_set_int(GRPC_ERROR_CANCELLED,
+                                          GRPC_ERROR_INT_GRPC_STATUS, status);
+    op->close_error = GRPC_ERROR_NONE;
+  }
+}
+
 void grpc_transport_stream_op_add_close(grpc_transport_stream_op *op,
                                         grpc_status_code status,
                                         gpr_slice *optional_message) {
-  close_message_data *cmd;
   GPR_ASSERT(status != GRPC_STATUS_OK);
-  if (op->cancel_with_status != GRPC_STATUS_OK ||
-      op->close_with_status != GRPC_STATUS_OK) {
+  if (op->cancel_error != GRPC_ERROR_NONE ||
+      op->close_error != GRPC_ERROR_NONE) {
     if (optional_message) {
       gpr_slice_unref(*optional_message);
     }
     return;
   }
-  if (optional_message) {
-    cmd = gpr_malloc(sizeof(*cmd));
-    cmd->message = *optional_message;
-    cmd->then_call = op->on_complete;
-    grpc_closure_init(&cmd->closure, free_message, cmd);
-    op->on_complete = &cmd->closure;
-    op->optional_close_message = &cmd->message;
+  grpc_error *error;
+  if (optional_message != NULL) {
+    char *msg = gpr_dump_slice(*optional_message, GPR_DUMP_ASCII);
+    error = grpc_error_set_str(GRPC_ERROR_CREATE(msg),
+                               GRPC_ERROR_STR_GRPC_MESSAGE, msg);
+    gpr_free(msg);
+    gpr_slice_unref(*optional_message);
+  } else {
+    error = GRPC_ERROR_CREATE("Call force closed");
   }
-  op->close_with_status = status;
+  error = grpc_error_set_int(error, GRPC_ERROR_INT_GRPC_STATUS, status);
+  add_error(op, &op->close_error, error);
 }
diff --git a/src/core/lib/transport/transport.h b/src/core/lib/transport/transport.h
index a46ccb643ce..d2f6344ee3c 100644
--- a/src/core/lib/transport/transport.h
+++ b/src/core/lib/transport/transport.h
@@ -135,13 +135,12 @@ typedef struct grpc_transport_stream_op {
   /** Collect any stats into provided buffer, zero internal stat counters */
   grpc_transport_stream_stats *collect_stats;
 
-  /** If != GRPC_STATUS_OK, cancel this stream */
-  grpc_status_code cancel_with_status;
+  /** If != GRPC_ERROR_NONE, cancel this stream */
+  grpc_error *cancel_error;
 
-  /** If != GRPC_STATUS_OK, send grpc-status, grpc-message, and close this
+  /** If != GRPC_ERROR, send grpc-status, grpc-message, and close this
       stream for both reading and writing */
-  grpc_status_code close_with_status;
-  gpr_slice *optional_close_message;
+  grpc_error *close_error;
 
   /* Indexes correspond to grpc_context_index enum values */
   grpc_call_context_element *context;
diff --git a/src/core/lib/transport/transport_op_string.c b/src/core/lib/transport/transport_op_string.c
index df04c611270..a862401df2c 100644
--- a/src/core/lib/transport/transport_op_string.c
+++ b/src/core/lib/transport/transport_op_string.c
@@ -119,10 +119,21 @@ char *grpc_transport_stream_op_string(grpc_transport_stream_op *op) {
     gpr_strvec_add(&b, gpr_strdup("RECV_TRAILING_METADATA"));
   }
 
-  if (op->cancel_with_status != GRPC_STATUS_OK) {
+  if (op->cancel_error != GRPC_STATUS_OK) {
     if (!first) gpr_strvec_add(&b, gpr_strdup(" "));
     first = 0;
-    gpr_asprintf(&tmp, "CANCEL:%d", op->cancel_with_status);
+    const char *msg = grpc_error_string(op->cancel_error);
+    gpr_asprintf(&tmp, "CANCEL:%s", msg);
+    grpc_error_free_string(msg);
+    gpr_strvec_add(&b, tmp);
+  }
+
+  if (op->close_error != GRPC_STATUS_OK) {
+    if (!first) gpr_strvec_add(&b, gpr_strdup(" "));
+    first = 0;
+    const char *msg = grpc_error_string(op->close_error);
+    gpr_asprintf(&tmp, "CLOSE:%s", msg);
+    grpc_error_free_string(msg);
     gpr_strvec_add(&b, tmp);
   }
 

From 5a3c6389edeaf19e7e0f0a6c0771c7548f0e0997 Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@google.com>
Date: Thu, 23 Jun 2016 14:02:33 -0700
Subject: [PATCH 191/280] Added braces around _service

---
 .../objective-c/route_guide/ViewControllers.m | 20 +++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/examples/objective-c/route_guide/ViewControllers.m b/examples/objective-c/route_guide/ViewControllers.m
index 26ca9d6220b..b2f99c437e7 100644
--- a/examples/objective-c/route_guide/ViewControllers.m
+++ b/examples/objective-c/route_guide/ViewControllers.m
@@ -86,8 +86,9 @@ static NSString * const kHostAddress = @"localhost:50051";
 
 @end
 
-@implementation GetFeatureViewController
-RTGRouteGuide *_service;
+@implementation GetFeatureViewController {
+  RTGRouteGuide *_service;
+}
 
 - (void)execRequest {
   void (^handler)(RTGFeature *response, NSError *error) = ^(RTGFeature *response, NSError *error) {
@@ -146,8 +147,9 @@ RTGRouteGuide *_service;
 
 @end
 
-@implementation ListFeaturesViewController
-RTGRouteGuide *_service;
+@implementation ListFeaturesViewController {
+  RTGRouteGuide *_service;
+}
 
 - (void)execRequest {
   RTGRectangle *rectangle = [RTGRectangle message];
@@ -200,8 +202,9 @@ RTGRouteGuide *_service;
 
 @end
 
-@implementation RecordRouteViewController
-RTGRouteGuide *_service;
+@implementation RecordRouteViewController {
+  RTGRouteGuide *_service;
+}
 
 - (void)execRequest {
   NSString *dataBasePath = [NSBundle.mainBundle pathForResource:@"route_guide_db"
@@ -268,8 +271,9 @@ RTGRouteGuide *_service;
 
 @end
 
-@implementation RouteChatViewController
-RTGRouteGuide *_service;
+@implementation RouteChatViewController {
+  RTGRouteGuide *_service;
+}
 
 - (void)execRequest {
   NSArray *notes = @[[RTGRouteNote noteWithMessage:@"First message" latitude:0 longitude:0],

From 733e3fc209f78695896b2d721069afad866cd2f7 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Thu, 23 Jun 2016 14:07:11 -0700
Subject: [PATCH 192/280] Fix comparison

---
 src/core/lib/transport/transport_op_string.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/core/lib/transport/transport_op_string.c b/src/core/lib/transport/transport_op_string.c
index a862401df2c..aede337e7cb 100644
--- a/src/core/lib/transport/transport_op_string.c
+++ b/src/core/lib/transport/transport_op_string.c
@@ -119,7 +119,7 @@ char *grpc_transport_stream_op_string(grpc_transport_stream_op *op) {
     gpr_strvec_add(&b, gpr_strdup("RECV_TRAILING_METADATA"));
   }
 
-  if (op->cancel_error != GRPC_STATUS_OK) {
+  if (op->cancel_error != GRPC_ERROR_NONE) {
     if (!first) gpr_strvec_add(&b, gpr_strdup(" "));
     first = 0;
     const char *msg = grpc_error_string(op->cancel_error);
@@ -128,7 +128,7 @@ char *grpc_transport_stream_op_string(grpc_transport_stream_op *op) {
     gpr_strvec_add(&b, tmp);
   }
 
-  if (op->close_error != GRPC_STATUS_OK) {
+  if (op->close_error != GRPC_ERROR_NONE) {
     if (!first) gpr_strvec_add(&b, gpr_strdup(" "));
     first = 0;
     const char *msg = grpc_error_string(op->close_error);

From ea0dc6af37469a45c2750df4bf852d12d75e9240 Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@google.com>
Date: Thu, 23 Jun 2016 14:10:38 -0700
Subject: [PATCH 193/280] Added a comment

---
 src/objective-c/GRPCClient/private/GRPCChannel.m | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/objective-c/GRPCClient/private/GRPCChannel.m b/src/objective-c/GRPCClient/private/GRPCChannel.m
index 6cd4cb0ca30..7b7b79e1c62 100644
--- a/src/objective-c/GRPCClient/private/GRPCChannel.m
+++ b/src/objective-c/GRPCClient/private/GRPCChannel.m
@@ -199,7 +199,7 @@ grpc_channel_args * buildChannelArgs(NSDictionary *dictionary) {
                                   NULL, GRPC_PROPAGATE_DEFAULTS,
                                   queue.unmanagedQueue,
                                   path.UTF8String,
-                                  NULL,
+                                  NULL, // Passing NULL for host
                                   gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
 }
 

From eb429c3067e54b0dcdae21d005a4e98a022caad8 Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@makarand-linux.mtv.corp.google.com>
Date: Thu, 23 Jun 2016 14:18:49 -0700
Subject: [PATCH 194/280] Removed gpr_log statement

---
 src/core/lib/iomgr/network_status_tracker.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/src/core/lib/iomgr/network_status_tracker.c b/src/core/lib/iomgr/network_status_tracker.c
index 0e34605c81d..38a1c9b7d41 100644
--- a/src/core/lib/iomgr/network_status_tracker.c
+++ b/src/core/lib/iomgr/network_status_tracker.c
@@ -64,7 +64,6 @@ void grpc_network_status_register_endpoint(grpc_endpoint *ep) {
     grpc_initialize_network_status_monitor();
   }
   gpr_mu_lock(&g_endpoint_mutex);
-  gpr_log(GPR_DEBUG, "Register endpoint %p", ep);
   if (head == NULL) {
     head = (endpoint_ll_node *)gpr_malloc(sizeof(endpoint_ll_node));
     head->ep = ep;
@@ -81,7 +80,6 @@ void grpc_network_status_register_endpoint(grpc_endpoint *ep) {
 void grpc_network_status_unregister_endpoint(grpc_endpoint *ep) {
   gpr_mu_lock(&g_endpoint_mutex);
   GPR_ASSERT(head);
-  gpr_log(GPR_DEBUG, "Unregister endpoint %p", ep);
   bool found = false;
   endpoint_ll_node *prev = head;
   // if we're unregistering the head, just move head to the next
@@ -116,7 +114,6 @@ void grpc_network_status_shutdown_all_endpoints() {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 
   for (endpoint_ll_node *curr = head; curr != NULL; curr = curr->next) {
-    gpr_log(GPR_DEBUG, "Shutting down endpoint %p", curr->ep);
     curr->ep->vtable->shutdown(&exec_ctx, curr->ep);
   }
   gpr_mu_unlock(&g_endpoint_mutex);

From d4d4c6f6f62a547da9136f57ddd6406facaf4ce5 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Thu, 23 Jun 2016 14:37:30 -0700
Subject: [PATCH 195/280] Fix comparison

---
 src/core/lib/transport/transport.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/lib/transport/transport.c b/src/core/lib/transport/transport.c
index 67920b05279..79a20e12626 100644
--- a/src/core/lib/transport/transport.c
+++ b/src/core/lib/transport/transport.c
@@ -192,7 +192,7 @@ static void add_error(grpc_transport_stream_op *op, grpc_error **which,
 void grpc_transport_stream_op_add_cancellation(grpc_transport_stream_op *op,
                                                grpc_status_code status) {
   GPR_ASSERT(status != GRPC_STATUS_OK);
-  if (op->cancel_error == GRPC_STATUS_OK) {
+  if (op->cancel_error == GRPC_ERROR_NONE) {
     op->cancel_error = grpc_error_set_int(GRPC_ERROR_CANCELLED,
                                           GRPC_ERROR_INT_GRPC_STATUS, status);
     op->close_error = GRPC_ERROR_NONE;

From 20d0a167beb287f61a7f33943fddfc34cae75860 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Thu, 23 Jun 2016 15:14:03 -0700
Subject: [PATCH 196/280] Better error handling and add
 polling_island_unlock_pair() helper

---
 src/core/lib/iomgr/ev_epoll_linux.c | 300 +++++++++++++++++-----------
 1 file changed, 182 insertions(+), 118 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index b1e9ac8a631..a77044edc50 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -237,6 +237,19 @@ struct grpc_pollset_set {
   grpc_fd **fds;
 };
 
+/*******************************************************************************
+ * Common helpers
+ */
+
+static void append_error(grpc_error **composite, grpc_error *error,
+                         const char *desc) {
+  if (error == GRPC_ERROR_NONE) return;
+  if (*composite == GRPC_ERROR_NONE) {
+    *composite = GRPC_ERROR_CREATE(desc);
+  }
+  *composite = grpc_error_add_child(*composite, error);
+}
+
 /*******************************************************************************
  * Polling island Definitions
  */
@@ -316,10 +329,13 @@ long pi_unref(polling_island *pi, int ref_cnt) {
 
 /* The caller is expected to hold pi->mu lock before calling this function */
 static void polling_island_add_fds_locked(polling_island *pi, grpc_fd **fds,
-                                          size_t fd_count, bool add_fd_refs) {
+                                          size_t fd_count, bool add_fd_refs,
+                                          grpc_error **error) {
   int err;
   size_t i;
   struct epoll_event ev;
+  char *err_msg;
+  const char *err_desc = "polling_island_add_fds";
 
 #ifdef GRPC_TSAN
   /* See the definition of g_epoll_sync for more context */
@@ -333,10 +349,12 @@ static void polling_island_add_fds_locked(polling_island *pi, grpc_fd **fds,
 
     if (err < 0) {
       if (errno != EEXIST) {
-        /* TODO: sreek - We need a better way to bubble up this error instead of
-           just logging a message */
-        gpr_log(GPR_ERROR, "epoll_ctl add for fd: %d failed with error: %s",
-                fds[i]->fd, strerror(errno));
+        gpr_asprintf(
+            &err_msg,
+            "epoll_ctl (epoll_fd: %d) add fd: %d failed with error: %d (%s)",
+            pi->epoll_fd, fds[i]->fd, errno, strerror(errno));
+        append_error(error, GRPC_OS_ERROR(errno, err_msg), err_desc);
+        gpr_free(err_msg);
       }
 
       continue;
@@ -356,37 +374,47 @@ static void polling_island_add_fds_locked(polling_island *pi, grpc_fd **fds,
 
 /* The caller is expected to hold pi->mu before calling this */
 static void polling_island_add_wakeup_fd_locked(polling_island *pi,
-                                                grpc_wakeup_fd *wakeup_fd) {
+                                                grpc_wakeup_fd *wakeup_fd,
+                                                grpc_error **error) {
   struct epoll_event ev;
   int err;
+  char *err_msg;
+  const char *err_desc = "polling_island_add_wakeup_fd";
 
   ev.events = (uint32_t)(EPOLLIN | EPOLLET);
   ev.data.ptr = wakeup_fd;
   err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_ADD,
                   GRPC_WAKEUP_FD_GET_READ_FD(wakeup_fd), &ev);
-  if (err < 0) {
-    gpr_log(GPR_ERROR,
-            "Failed to add grpc_wake_up_fd (%d) to the epoll set (epoll_fd: %d)"
-            ". Error: %s",
-            GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd), pi->epoll_fd,
-            strerror(errno));
+  if (err < 0 && errno != EEXIST) {
+    gpr_asprintf(&err_msg,
+                 "epoll_ctl (epoll_fd: %d) add wakeup fd: %d failed with "
+                 "error: %d (%s)",
+                 pi->epoll_fd,
+                 GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd), errno,
+                 strerror(errno));
+    append_error(error, GRPC_OS_ERROR(errno, err_msg), err_desc);
+    gpr_free(err_msg);
   }
 }
 
 /* The caller is expected to hold pi->mu lock before calling this function */
 static void polling_island_remove_all_fds_locked(polling_island *pi,
-                                                 bool remove_fd_refs) {
+                                                 bool remove_fd_refs,
+                                                 grpc_error **error) {
   int err;
   size_t i;
+  char *err_msg;
+  const char *err_desc = "polling_island_remove_fds";
 
   for (i = 0; i < pi->fd_cnt; i++) {
     err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_DEL, pi->fds[i]->fd, NULL);
     if (err < 0 && errno != ENOENT) {
-      /* TODO: sreek - We need a better way to bubble up this error instead of
-      * just logging a message */
-      gpr_log(GPR_ERROR,
-              "epoll_ctl deleting fds[%zu]: %d failed with error: %s", i,
-              pi->fds[i]->fd, strerror(errno));
+      gpr_asprintf(&err_msg,
+                   "epoll_ctl (epoll_fd: %d) delete fds[%zu]: %d failed with "
+                   "error: %d (%s)",
+                   pi->epoll_fd, i, pi->fds[i]->fd, errno, strerror(errno));
+      append_error(error, GRPC_OS_ERROR(errno, err_msg), err_desc);
+      gpr_free(err_msg);
     }
 
     if (remove_fd_refs) {
@@ -399,17 +427,24 @@ static void polling_island_remove_all_fds_locked(polling_island *pi,
 
 /* The caller is expected to hold pi->mu lock before calling this function */
 static void polling_island_remove_fd_locked(polling_island *pi, grpc_fd *fd,
-                                            bool is_fd_closed) {
+                                            bool is_fd_closed,
+                                            grpc_error **error) {
   int err;
   size_t i;
+  char *err_msg;
+  const char *err_desc = "polling_island_remove_fd";
 
   /* If fd is already closed, then it would have been automatically been removed
      from the epoll set */
   if (!is_fd_closed) {
     err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_DEL, fd->fd, NULL);
     if (err < 0 && errno != ENOENT) {
-      gpr_log(GPR_ERROR, "epoll_ctl deleting fd: %d failed with error; %s",
-              fd->fd, strerror(errno));
+      gpr_asprintf(
+          &err_msg,
+          "epoll_ctl (epoll_fd: %d) del fd: %d failed with error: %d (%s)",
+          pi->epoll_fd, fd->fd, errno, strerror(errno));
+      append_error(error, GRPC_OS_ERROR(errno, err_msg), err_desc);
+      gpr_free(err_msg);
     }
   }
 
@@ -422,8 +457,12 @@ static void polling_island_remove_fd_locked(polling_island *pi, grpc_fd *fd,
   }
 }
 
-static polling_island *polling_island_create(grpc_fd *initial_fd) {
+/* Might return NULL in case of an error */
+static polling_island *polling_island_create(grpc_fd *initial_fd,
+                                             grpc_error **error) {
   polling_island *pi = NULL;
+  char *err_msg;
+  const char *err_desc = "polling_island_create";
 
   /* Try to get one from the polling island freelist */
   gpr_mu_lock(&g_pi_freelist_mu);
@@ -449,22 +488,22 @@ static polling_island *polling_island_create(grpc_fd *initial_fd) {
   pi->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
 
   if (pi->epoll_fd < 0) {
-    gpr_log(GPR_ERROR, "epoll_create1() failed with error: %s",
-            strerror(errno));
-  }
-  GPR_ASSERT(pi->epoll_fd >= 0);
-
-  polling_island_add_wakeup_fd_locked(pi, &grpc_global_wakeup_fd);
-
-  pi->next_free = NULL;
+    gpr_asprintf(&err_msg, "epoll_create1 failed with error %d (%s)", errno,
+                 strerror(errno));
+    append_error(error, GRPC_OS_ERROR(errno, err_msg), err_desc);
+    gpr_free(err_msg);
+  } else {
+    polling_island_add_wakeup_fd_locked(pi, &grpc_global_wakeup_fd, error);
+    pi->next_free = NULL;
 
-  if (initial_fd != NULL) {
-    /* Lock the polling island here just in case we got this structure from the
-       freelist and the polling island lock was not released yet (by the code
-       that adds the polling island to the freelist) */
-    gpr_mu_lock(&pi->mu);
-    polling_island_add_fds_locked(pi, &initial_fd, 1, true);
-    gpr_mu_unlock(&pi->mu);
+    if (initial_fd != NULL) {
+      /* Lock the polling island here just in case we got this structure from
+         the freelist and the polling island lock was not released yet (by the
+         code that adds the polling island to the freelist) */
+      gpr_mu_lock(&pi->mu);
+      polling_island_add_fds_locked(pi, &initial_fd, 1, true, error);
+      gpr_mu_unlock(&pi->mu);
+    }
   }
 
   return pi;
@@ -534,7 +573,9 @@ static polling_island *polling_island_lock(polling_island *pi) {
   return pi;
 }
 
-/* Gets the lock on the *latest* polling islands pointed by *p and *q.
+/* Gets the lock on the *latest* polling islands in the linked lists pointed by
+   *p and *q (and also updates *p and *q to point to the latest polling islands)
+
    This function is needed because calling the following block of code to obtain
    locks on polling islands (*p and *q) is prone to deadlocks.
      {
@@ -550,18 +591,8 @@ static polling_island *polling_island_lock(polling_island *pi) {
      ..
      .. Critical section with both p1 and p2 locked
      ..
-     // Release locks
-     // **IMPORTANT**: Make sure you check p1 == p2 AFTER the function
-     // polling_island_lock_pair() was called and if so, release the lock only
-     // once. Note: Even if p1 != p2 beforec calling polling_island_lock_pair(),
-     // they might be after the function returns:
-     if (p1 == p2) {
-       gpr_mu_unlock(&p1->mu)
-     } else {
-       gpr_mu_unlock(&p1->mu);
-       gpr_mu_unlock(&p2->mu);
-     }
-
+     // Release locks: Always call polling_island_unlock_pair() to release locks
+     polling_island_unlock_pair(p1, p2);
 */
 static void polling_island_lock_pair(polling_island **p, polling_island **q) {
   polling_island *pi_1 = *p;
@@ -623,39 +654,46 @@ static void polling_island_lock_pair(polling_island **p, polling_island **q) {
   *q = pi_2;
 }
 
-static polling_island *polling_island_merge(polling_island *p,
-                                            polling_island *q) {
-  /* Get locks on both the polling islands */
-  polling_island_lock_pair(&p, &q);
-
+static void polling_island_unlock_pair(polling_island *p, polling_island *q) {
   if (p == q) {
-    /* Nothing needs to be done here */
     gpr_mu_unlock(&p->mu);
-    return p;
+  } else {
+    gpr_mu_unlock(&p->mu);
+    gpr_mu_unlock(&q->mu);
   }
+}
 
-  /* Make sure that p points to the polling island with fewer fds than q */
-  if (p->fd_cnt > q->fd_cnt) {
-    GPR_SWAP(polling_island *, p, q);
-  }
+static polling_island *polling_island_merge(polling_island *p,
+                                            polling_island *q,
+                                            grpc_error **error) {
+  /* Get locks on both the polling islands */
+  polling_island_lock_pair(&p, &q);
 
-  /* "Merge" p with q i.e move all the fds from p (The one with fewer fds) to q
-      Note that the refcounts on the fds being moved will not change here. This
-      is why the last parameter in the following two functions is 'false') */
-  polling_island_add_fds_locked(q, p->fds, p->fd_cnt, false);
-  polling_island_remove_all_fds_locked(p, false);
+  if (p != q) {
+    /* Make sure that p points to the polling island with fewer fds than q */
+    if (p->fd_cnt > q->fd_cnt) {
+      GPR_SWAP(polling_island *, p, q);
+    }
+
+    /* Merge p with q i.e move all the fds from p (The one with fewer fds) to q
+       Note that the refcounts on the fds being moved will not change here.
+       This is why the last param in the following two functions is 'false') */
+    polling_island_add_fds_locked(q, p->fds, p->fd_cnt, false, error);
+    polling_island_remove_all_fds_locked(p, false, error);
 
-  /* Wakeup all the pollers (if any) on p so that they can pickup this change */
-  polling_island_add_wakeup_fd_locked(p, &polling_island_wakeup_fd);
+    /* Wakeup all the pollers (if any) on p so that they pickup this change */
+    polling_island_add_wakeup_fd_locked(p, &polling_island_wakeup_fd, error);
 
-  /* Add the 'merged_to' link from p --> q */
-  gpr_atm_rel_store(&p->merged_to, (gpr_atm)q);
-  PI_ADD_REF(q, "pi_merge"); /* To account for the new incoming ref from p */
+    /* Add the 'merged_to' link from p --> q */
+    gpr_atm_rel_store(&p->merged_to, (gpr_atm)q);
+    PI_ADD_REF(q, "pi_merge"); /* To account for the new incoming ref from p */
+  }
+  /* else if p == q, nothing needs to be done */
 
-  gpr_mu_unlock(&p->mu);
-  gpr_mu_unlock(&q->mu);
+  polling_island_unlock_pair(p, q);
 
-  /* Return the merged polling island */
+  /* Return the merged polling island (Note that no merge would have happened
+     if p == q which is ok) */
   return q;
 }
 
@@ -853,6 +891,8 @@ static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
                       grpc_closure *on_done, int *release_fd,
                       const char *reason) {
   bool is_fd_closed = false;
+  grpc_error *error = GRPC_ERROR_NONE;
+
   gpr_mu_lock(&fd->mu);
   fd->on_done_closure = on_done;
 
@@ -882,7 +922,7 @@ static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
   gpr_mu_lock(&fd->pi_mu);
   if (fd->polling_island != NULL) {
     polling_island *pi_latest = polling_island_lock(fd->polling_island);
-    polling_island_remove_fd_locked(pi_latest, fd, is_fd_closed);
+    polling_island_remove_fd_locked(pi_latest, fd, is_fd_closed, &error);
     gpr_mu_unlock(&pi_latest->mu);
 
     PI_UNREF(fd->polling_island, "fd_orphan");
@@ -890,10 +930,11 @@ static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
   }
   gpr_mu_unlock(&fd->pi_mu);
 
-  grpc_exec_ctx_sched(exec_ctx, fd->on_done_closure, GRPC_ERROR_NONE, NULL);
+  grpc_exec_ctx_sched(exec_ctx, fd->on_done_closure, error, NULL);
 
   gpr_mu_unlock(&fd->mu);
   UNREF_BY(fd, 2, reason); /* Drop the reference */
+  GRPC_LOG_IF_ERROR("fd_orphan", GRPC_ERROR_REF(error));
 }
 
 static grpc_error *fd_shutdown_error(bool shutdown) {
@@ -1062,19 +1103,12 @@ static void push_front_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
   worker->prev->next = worker->next->prev = worker;
 }
 
-static void kick_append_error(grpc_error **composite, grpc_error *error) {
-  if (error == GRPC_ERROR_NONE) return;
-  if (*composite == GRPC_ERROR_NONE) {
-    *composite = GRPC_ERROR_CREATE("Kick Failure");
-  }
-  *composite = grpc_error_add_child(*composite, error);
-}
-
 /* p->mu must be held before calling this function */
 static grpc_error *pollset_kick(grpc_pollset *p,
                                 grpc_pollset_worker *specific_worker) {
   GPR_TIMER_BEGIN("pollset_kick", 0);
   grpc_error *error = GRPC_ERROR_NONE;
+  const char *err_desc = "Kick Failure";
 
   grpc_pollset_worker *worker = specific_worker;
   if (worker != NULL) {
@@ -1084,7 +1118,7 @@ static grpc_error *pollset_kick(grpc_pollset *p,
         for (worker = p->root_worker.next; worker != &p->root_worker;
              worker = worker->next) {
           if (gpr_tls_get(&g_current_thread_worker) != (intptr_t)worker) {
-            kick_append_error(&error, pollset_worker_kick(worker));
+            append_error(&error, pollset_worker_kick(worker), err_desc);
           }
         }
       } else {
@@ -1094,7 +1128,7 @@ static grpc_error *pollset_kick(grpc_pollset *p,
     } else {
       GPR_TIMER_MARK("kicked_specifically", 0);
       if (gpr_tls_get(&g_current_thread_worker) != (intptr_t)worker) {
-        kick_append_error(&error, pollset_worker_kick(worker));
+        append_error(&error, pollset_worker_kick(worker), err_desc);
       }
     }
   } else if (gpr_tls_get(&g_current_thread_pollset) != (intptr_t)p) {
@@ -1110,7 +1144,7 @@ static grpc_error *pollset_kick(grpc_pollset *p,
     if (worker != NULL) {
       GPR_TIMER_MARK("finally_kick", 0);
       push_back_worker(p, worker);
-      kick_append_error(&error, pollset_worker_kick(worker));
+      append_error(&error, pollset_worker_kick(worker), err_desc);
     } else {
       GPR_TIMER_MARK("kicked_no_pollers", 0);
       p->kicked_without_pollers = true;
@@ -1238,23 +1272,17 @@ static void pollset_reset(grpc_pollset *pollset) {
   pollset_release_polling_island(pollset, "ps_reset");
 }
 
-static void work_combine_error(grpc_error **composite, grpc_error *error) {
-  if (error == GRPC_ERROR_NONE) return;
-  if (*composite == GRPC_ERROR_NONE) {
-    *composite = GRPC_ERROR_CREATE("pollset_work");
-  }
-  *composite = grpc_error_add_child(*composite, error);
-}
-
 #define GRPC_EPOLL_MAX_EVENTS 1000
-static grpc_error *pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
-                                           grpc_pollset *pollset,
-                                           int timeout_ms, sigset_t *sig_mask) {
+/* Note: sig_mask contains the signal mask to use *during* epoll_wait() */
+static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
+                                    grpc_pollset *pollset, int timeout_ms,
+                                    sigset_t *sig_mask, grpc_error **error) {
   struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS];
   int epoll_fd = -1;
   int ep_rv;
   polling_island *pi = NULL;
-  grpc_error *error = GRPC_ERROR_NONE;
+  char *err_msg;
+  const char *err_desc = "pollset_work_and_unlock";
   GPR_TIMER_BEGIN("pollset_work_and_unlock", 0);
 
   /* We need to get the epoll_fd to wait on. The epoll_fd is in inside the
@@ -1265,11 +1293,15 @@ static grpc_error *pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
      which we got the epoll_fd) got merged with another island while we are
      in this function. This is still okay because in such a case, we will wakeup
      right-away from epoll_wait() and pick up the latest polling_island the next
-     this function (i.e pollset_work_and_unlock()) is called.
-     */
+     this function (i.e pollset_work_and_unlock()) is called */
 
   if (pollset->polling_island == NULL) {
-    pollset->polling_island = polling_island_create(NULL);
+    pollset->polling_island = polling_island_create(NULL, error);
+    if (pollset->polling_island == NULL) {
+      GPR_TIMER_END("pollset_work_and_unlock", 0);
+      return; /* Fatal error. We cannot continue */
+    }
+
     PI_ADD_REF(pollset->polling_island, "ps");
   }
 
@@ -1297,8 +1329,10 @@ static grpc_error *pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
                         sig_mask);
     if (ep_rv < 0) {
       if (errno != EINTR) {
-        gpr_log(GPR_ERROR, "epoll_pwait() failed: %s", strerror(errno));
-        work_combine_error(&error, GRPC_OS_ERROR(errno, "epoll_pwait"));
+        gpr_asprintf(&err_msg,
+                     "epoll_wait() epoll fd: %d failed with error: %d (%s)",
+                     epoll_fd, errno, strerror(errno));
+        append_error(error, GRPC_OS_ERROR(errno, err_msg), err_desc);
       } else {
         /* We were interrupted. Save an interation by doing a zero timeout
            epoll_wait to see if there are any other events of interest */
@@ -1314,8 +1348,9 @@ static grpc_error *pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
     for (int i = 0; i < ep_rv; ++i) {
       void *data_ptr = ep_ev[i].data.ptr;
       if (data_ptr == &grpc_global_wakeup_fd) {
-        work_combine_error(
-            &error, grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd));
+        append_error(error,
+                     grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd),
+                     err_desc);
       } else if (data_ptr == &polling_island_wakeup_fd) {
         /* This means that our polling island is merged with a different
            island. We do not have to do anything here since the subsequent call
@@ -1346,7 +1381,6 @@ static grpc_error *pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
   PI_UNREF(pi, "ps_work");
 
   GPR_TIMER_END("pollset_work_and_unlock", 0);
-  return error;
 }
 
 /* pollset->mu lock must be held by the caller before calling this.
@@ -1368,6 +1402,7 @@ static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   worker.pt_id = pthread_self();
 
   *worker_hdl = &worker;
+
   gpr_tls_set(&g_current_thread_pollset, (intptr_t)pollset);
   gpr_tls_set(&g_current_thread_worker, (intptr_t)&worker);
 
@@ -1379,14 +1414,37 @@ static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
     GPR_TIMER_MARK("pollset_work.kicked_without_pollers", 0);
     pollset->kicked_without_pollers = 0;
   } else if (!pollset->shutting_down) {
+    /* We use the posix-signal with number 'grpc_wakeup_signal' for waking up
+       (i.e 'kicking') a worker in the pollset.
+       A 'kick' is a way to inform that worker that there is some pending work
+       that needs immediate attention (like an event on the completion queue,
+       or a polling island merge that results in a new epoll-fd to wait on) and
+       that the worker should not spend time waiting in epoll_pwait().
+
+       A kick can come at anytime (i.e before/during or after the worker calls
+       epoll_pwait()) but in all cases we have to make sure that when a worker
+       gets a kick, it does not spend time in epoll_pwait(). In other words, one
+       kick should result in skipping/exiting of one epoll_pwait();
+
+       To accomplish this, we mask 'grpc_wakeup_signal' on this worker at all
+       times *except* when it is in epoll_pwait(). This way, the worker never
+       misses acting on a kick */
+
     sigemptyset(&new_mask);
     sigaddset(&new_mask, grpc_wakeup_signal);
     pthread_sigmask(SIG_BLOCK, &new_mask, &orig_mask);
     sigdelset(&orig_mask, grpc_wakeup_signal);
+    /* new_mask:  The new thread mask which blocks 'grpc_wakeup_signal'. This is
+                  the mask used at all times *except during epoll_wait()*"
+       orig_mask: The thread mask which allows 'grpc_wakeup_signal' and this is
+                  the mask to use *during epoll_wait()*
+
+       The new_mask is set on the worker before it is added to the pollset (i.e
+       before it can be kicked) */
 
-    push_front_worker(pollset, &worker);
+    push_front_worker(pollset, &worker); /* Add worker to pollset */
 
-    error = pollset_work_and_unlock(exec_ctx, pollset, timeout_ms, &orig_mask);
+    pollset_work_and_unlock(exec_ctx, pollset, timeout_ms, &orig_mask, &error);
     grpc_exec_ctx_flush(exec_ctx);
 
     gpr_mu_lock(&pollset->mu);
@@ -1412,15 +1470,20 @@ static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   }
 
   *worker_hdl = NULL;
+
   gpr_tls_set(&g_current_thread_pollset, (intptr_t)0);
   gpr_tls_set(&g_current_thread_worker, (intptr_t)0);
+
   GPR_TIMER_END("pollset_work", 0);
+
   GRPC_LOG_IF_ERROR("pollset_work", GRPC_ERROR_REF(error));
   return error;
 }
 
 static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                            grpc_fd *fd) {
+  grpc_error *error = GRPC_ERROR_NONE;
+
   gpr_mu_lock(&pollset->mu);
   gpr_mu_lock(&fd->pi_mu);
 
@@ -1443,19 +1506,23 @@ static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   if (fd->polling_island == pollset->polling_island) {
     pi_new = fd->polling_island;
     if (pi_new == NULL) {
-      pi_new = polling_island_create(fd);
+      pi_new = polling_island_create(fd, &error);
     }
   } else if (fd->polling_island == NULL) {
     pi_new = polling_island_lock(pollset->polling_island);
-    polling_island_add_fds_locked(pi_new, &fd, 1, true);
+    polling_island_add_fds_locked(pi_new, &fd, 1, true, &error);
     gpr_mu_unlock(&pi_new->mu);
   } else if (pollset->polling_island == NULL) {
     pi_new = polling_island_lock(fd->polling_island);
     gpr_mu_unlock(&pi_new->mu);
   } else {
-    pi_new = polling_island_merge(fd->polling_island, pollset->polling_island);
+    pi_new = polling_island_merge(fd->polling_island, pollset->polling_island,
+                                  &error);
   }
 
+  /* At this point, pi_new is the polling island that both fd->polling_island
+     and pollset->polling_island must be pointing to */
+
   if (fd->polling_island != pi_new) {
     PI_ADD_REF(pi_new, "fd");
     if (fd->polling_island != NULL) {
@@ -1645,13 +1712,10 @@ bool grpc_are_polling_islands_equal(void *p, void *q) {
   polling_island *p1 = p;
   polling_island *p2 = q;
 
+  /* Note: polling_island_lock_pair() may change p1 and p2 to point to the
+     latest polling islands in their respective linked lists */
   polling_island_lock_pair(&p1, &p2);
-  if (p1 == p2) {
-    gpr_mu_unlock(&p1->mu);
-  } else {
-    gpr_mu_unlock(&p1->mu);
-    gpr_mu_unlock(&p2->mu);
-  }
+  polling_island_unlock_pair(p1, p2);
 
   return p1 == p2;
 }

From 74189cd94b49be086e9320bf9536ab4bacfa6d61 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Thu, 23 Jun 2016 15:39:06 -0700
Subject: [PATCH 197/280] Remove caching of results by run_tests

SIGNIFICANTLY increases the performance of actually running tests...
---
 tools/run_tests/jobset.py    | 68 ++++++++----------------------------
 tools/run_tests/run_tests.py | 63 ++-------------------------------
 2 files changed, 18 insertions(+), 113 deletions(-)

diff --git a/tools/run_tests/jobset.py b/tools/run_tests/jobset.py
index d3259e724df..40409c43948 100755
--- a/tools/run_tests/jobset.py
+++ b/tools/run_tests/jobset.py
@@ -29,7 +29,6 @@
 
 """Run a group of subprocesses and then finish."""
 
-import hashlib
 import multiprocessing
 import os
 import platform
@@ -149,7 +148,7 @@ def which(filename):
 class JobSpec(object):
   """Specifies what to run for a job."""
 
-  def __init__(self, cmdline, shortname=None, environ=None, hash_targets=None,
+  def __init__(self, cmdline, shortname=None, environ=None,
                cwd=None, shell=False, timeout_seconds=5*60, flake_retries=0,
                timeout_retries=0, kill_handler=None, cpu_cost=1.0,
                verbose_success=False):
@@ -157,19 +156,14 @@ class JobSpec(object):
     Arguments:
       cmdline: a list of arguments to pass as the command line
       environ: a dictionary of environment variables to set in the child process
-      hash_targets: which files to include in the hash representing the jobs version
-                    (or empty, indicating the job should not be hashed)
       kill_handler: a handler that will be called whenever job.kill() is invoked
       cpu_cost: number of cores per second this job needs
     """
     if environ is None:
       environ = {}
-    if hash_targets is None:
-      hash_targets = []
     self.cmdline = cmdline
     self.environ = environ
     self.shortname = cmdline[0] if shortname is None else shortname
-    self.hash_targets = hash_targets or []
     self.cwd = cwd
     self.shell = shell
     self.timeout_seconds = timeout_seconds
@@ -180,7 +174,7 @@ class JobSpec(object):
     self.verbose_success = verbose_success
 
   def identity(self):
-    return '%r %r %r' % (self.cmdline, self.environ, self.hash_targets)
+    return '%r %r' % (self.cmdline, self.environ)
 
   def __hash__(self):
     return hash(self.identity())
@@ -205,9 +199,8 @@ class JobResult(object):
 class Job(object):
   """Manages one job."""
 
-  def __init__(self, spec, bin_hash, newline_on_success, travis, add_env):
+  def __init__(self, spec, newline_on_success, travis, add_env):
     self._spec = spec
-    self._bin_hash = bin_hash
     self._newline_on_success = newline_on_success
     self._travis = travis
     self._add_env = add_env.copy()
@@ -249,7 +242,7 @@ class Job(object):
       self._process = try_start()
     self._state = _RUNNING
 
-  def state(self, update_cache):
+  def state(self):
     """Poll current state of the job. Prints messages at completion."""
     def stdout(self=self):
       self._tempfile.seek(0)
@@ -293,8 +286,6 @@ class Job(object):
             stdout() if self._spec.verbose_success else None,
             do_newline=self._newline_on_success or self._travis)
         self.result.state = 'PASSED'
-        if self._bin_hash:
-          update_cache.finished(self._spec.identity(), self._bin_hash)
     elif (self._state == _RUNNING and
           self._spec.timeout_seconds is not None and
           time.time() - self._start > self._spec.timeout_seconds):
@@ -329,7 +320,7 @@ class Jobset(object):
   """Manages one run of jobs."""
 
   def __init__(self, check_cancelled, maxjobs, newline_on_success, travis,
-               stop_on_failure, add_env, cache):
+               stop_on_failure, add_env):
     self._running = set()
     self._check_cancelled = check_cancelled
     self._cancelled = False
@@ -338,9 +329,7 @@ class Jobset(object):
     self._maxjobs = maxjobs
     self._newline_on_success = newline_on_success
     self._travis = travis
-    self._cache = cache
     self._stop_on_failure = stop_on_failure
-    self._hashes = {}
     self._add_env = add_env
     self.resultset = {}
     self._remaining = None
@@ -367,37 +356,21 @@ class Jobset(object):
       if current_cpu_cost + spec.cpu_cost <= self._maxjobs: break
       self.reap()
     if self.cancelled(): return False
-    if spec.hash_targets:
-      if spec.identity() in self._hashes:
-        bin_hash = self._hashes[spec.identity()]
-      else:
-        bin_hash = hashlib.sha1()
-        for fn in spec.hash_targets:
-          with open(which(fn)) as f:
-            bin_hash.update(f.read())
-        bin_hash = bin_hash.hexdigest()
-        self._hashes[spec.identity()] = bin_hash
-      should_run = self._cache.should_run(spec.identity(), bin_hash)
-    else:
-      bin_hash = None
-      should_run = True
-    if should_run:
-      job = Job(spec,
-                bin_hash,
-                self._newline_on_success,
-                self._travis,
-                self._add_env)
-      self._running.add(job)
-      if not self.resultset.has_key(job.GetSpec().shortname):
-        self.resultset[job.GetSpec().shortname] = []
-    return True
+    job = Job(spec,
+              self._newline_on_success,
+              self._travis,
+              self._add_env)
+    self._running.add(job)
+    if not self.resultset.has_key(job.GetSpec().shortname):
+      self.resultset[job.GetSpec().shortname] = []
+      return True
 
   def reap(self):
     """Collect the dead jobs."""
     while self._running:
       dead = set()
       for job in self._running:
-        st = job.state(self._cache)
+        st = job.state()
         if st == _RUNNING: continue
         if st == _FAILURE or st == _KILLED:
           self._failures += 1
@@ -450,15 +423,6 @@ def _never_cancelled():
   return False
 
 
-# cache class that caches nothing
-class NoCache(object):
-  def should_run(self, cmdline, bin_hash):
-    return True
-
-  def finished(self, cmdline, bin_hash):
-    pass
-
-
 def tag_remaining(xs):
   staging = []
   for x in xs:
@@ -477,12 +441,10 @@ def run(cmdlines,
         travis=False,
         infinite_runs=False,
         stop_on_failure=False,
-        cache=None,
         add_env={}):
   js = Jobset(check_cancelled,
               maxjobs if maxjobs is not None else _DEFAULT_MAX_JOBS,
-              newline_on_success, travis, stop_on_failure, add_env,
-              cache if cache is not None else NoCache())
+              newline_on_success, travis, stop_on_failure, add_env)
   for cmdline, remaining in tag_remaining(cmdlines):
     if not js.start(cmdline):
       break
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index e4779e3a4e8..c571a81eb28 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -33,7 +33,6 @@
 import argparse
 import ast
 import glob
-import hashlib
 import itertools
 import json
 import multiprocessing
@@ -78,24 +77,18 @@ class Config(object):
     if environ is None:
       environ = {}
     self.build_config = config
-    self.allow_hashing = (config != 'gcov')
     self.environ = environ
     self.environ['CONFIG'] = config
     self.tool_prefix = tool_prefix
     self.timeout_multiplier = timeout_multiplier
 
-  def job_spec(self, cmdline, hash_targets, timeout_seconds=5*60,
+  def job_spec(self, cmdline, timeout_seconds=5*60,
                shortname=None, environ={}, cpu_cost=1.0, flaky=False):
     """Construct a jobset.JobSpec for a test under this config
 
        Args:
          cmdline:      a list of strings specifying the command line the test
                        would like to run
-         hash_targets: either None (don't do caching of test results), or
-                       a list of strings specifying files to include in a
-                       binary hash to check if a test has changed
-                       -- if used, all artifacts needed to run the test must
-                          be listed
     """
     actual_environ = self.environ.copy()
     for k, v in environ.iteritems():
@@ -105,8 +98,6 @@ class Config(object):
                           environ=actual_environ,
                           cpu_cost=cpu_cost,
                           timeout_seconds=(self.timeout_multiplier * timeout_seconds if timeout_seconds else None),
-                          hash_targets=hash_targets
-                              if self.allow_hashing else None,
                           flake_retries=5 if flaky or args.allow_flakes else 0,
                           timeout_retries=3 if args.allow_flakes else 0)
 
@@ -425,7 +416,7 @@ class PythonLanguage(object):
     return []
 
   def build_steps(self):
-    return [['tools/run_tests/build_python.sh', tox_env] 
+    return [['tools/run_tests/build_python.sh', tox_env]
             for tox_env in self._tox_envs]
 
   def post_tests_steps(self):
@@ -1058,46 +1049,6 @@ runs_per_test = args.runs_per_test
 forever = args.forever
 
 
-class TestCache(object):
-  """Cache for running tests."""
-
-  def __init__(self, use_cache_results):
-    self._last_successful_run = {}
-    self._use_cache_results = use_cache_results
-    self._last_save = time.time()
-
-  def should_run(self, cmdline, bin_hash):
-    if cmdline not in self._last_successful_run:
-      return True
-    if self._last_successful_run[cmdline] != bin_hash:
-      return True
-    if not self._use_cache_results:
-      return True
-    return False
-
-  def finished(self, cmdline, bin_hash):
-    self._last_successful_run[cmdline] = bin_hash
-    if time.time() - self._last_save > 1:
-      self.save()
-
-  def dump(self):
-    return [{'cmdline': k, 'hash': v}
-            for k, v in self._last_successful_run.iteritems()]
-
-  def parse(self, exdump):
-    self._last_successful_run = dict((o['cmdline'], o['hash']) for o in exdump)
-
-  def save(self):
-    with open('.run_tests_cache', 'w') as f:
-      f.write(json.dumps(self.dump()))
-    self._last_save = time.time()
-
-  def maybe_load(self):
-    if os.path.exists('.run_tests_cache'):
-      with open('.run_tests_cache') as f:
-        self.parse(json.loads(f.read()))
-
-
 def _start_port_server(port_server_port):
   # check if a compatible port server is running
   # if incompatible (version mismatch) ==> start a new one
@@ -1217,7 +1168,7 @@ class BuildAndRunError(object):
 
 # returns a list of things that failed (or an empty list on success)
 def _build_and_run(
-    check_cancelled, newline_on_success, cache, xml_report=None, build_only=False):
+    check_cancelled, newline_on_success, xml_report=None, build_only=False):
   """Do one pass of building & running tests."""
   # build latest sequentially
   num_failures, resultset = jobset.run(
@@ -1266,7 +1217,6 @@ def _build_and_run(
         all_runs, check_cancelled, newline_on_success=newline_on_success,
         travis=args.travis, infinite_runs=infinite_runs, maxjobs=args.jobs,
         stop_on_failure=args.stop_on_failure,
-        cache=cache if not xml_report else None,
         add_env={'GRPC_TEST_PORT_SERVER': 'localhost:%d' % port_server_port})
     if resultset:
       for k, v in sorted(resultset.items()):
@@ -1295,14 +1245,9 @@ def _build_and_run(
   if num_test_failures:
     out.append(BuildAndRunError.TEST)
 
-  if cache: cache.save()
-
   return out
 
 
-test_cache = TestCache(runs_per_test == 1)
-test_cache.maybe_load()
-
 if forever:
   success = True
   while True:
@@ -1312,7 +1257,6 @@ if forever:
     previous_success = success
     errors = _build_and_run(check_cancelled=have_files_changed,
                             newline_on_success=False,
-                            cache=test_cache,
                             build_only=args.build_only) == 0
     if not previous_success and not errors:
       jobset.message('SUCCESS',
@@ -1324,7 +1268,6 @@ if forever:
 else:
   errors = _build_and_run(check_cancelled=lambda: False,
                           newline_on_success=args.newline_on_success,
-                          cache=test_cache,
                           xml_report=args.xml_report,
                           build_only=args.build_only)
   if not errors:

From 98d31d1a40fe0d320f2488794d97a0bad5a8060d Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Thu, 23 Jun 2016 15:43:22 -0700
Subject: [PATCH 198/280] Fix special value lookup

---
 src/core/lib/iomgr/error.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/core/lib/iomgr/error.c b/src/core/lib/iomgr/error.c
index da0d6972360..9f5ba76fd6c 100644
--- a/src/core/lib/iomgr/error.c
+++ b/src/core/lib/iomgr/error.c
@@ -276,7 +276,8 @@ bool grpc_error_get_int(grpc_error *err, grpc_error_ints which, intptr_t *p) {
   void *pp;
   if (is_special(err)) {
     if (err == GRPC_ERROR_CANCELLED && which == GRPC_ERROR_INT_GRPC_STATUS) {
-      return GRPC_STATUS_CANCELLED;
+      *p = GRPC_STATUS_CANCELLED;
+      return true;
     }
     return false;
   }

From 6a29545c8c5ef61346af3a9b0bdd2ddb39ba15c8 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Thu, 23 Jun 2016 15:53:10 -0700
Subject: [PATCH 199/280] Change the type of 'ref_count' in polling_island from
 gpr_atm to gpr_refcount

---
 src/core/lib/iomgr/ev_epoll_linux.c | 69 +++++++++++++----------------
 1 file changed, 31 insertions(+), 38 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index a77044edc50..4dca551e1e1 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -121,6 +121,7 @@ struct grpc_fd {
 };
 
 /* Reference counting for fds */
+// #define GRPC_FD_REF_COUNT_DEBUG
 #ifdef GRPC_FD_REF_COUNT_DEBUG
 static void fd_ref(grpc_fd *fd, const char *reason, const char *file, int line);
 static void fd_unref(grpc_fd *fd, const char *reason, const char *file,
@@ -147,13 +148,13 @@ static void fd_global_shutdown(void);
 // #define GRPC_PI_REF_COUNT_DEBUG
 #ifdef GRPC_PI_REF_COUNT_DEBUG
 
-#define PI_ADD_REF(p, r) pi_add_ref_dbg((p), 1, (r), __FILE__, __LINE__)
-#define PI_UNREF(p, r) pi_unref_dbg((p), 1, (r), __FILE__, __LINE__)
+#define PI_ADD_REF(p, r) pi_add_ref_dbg((p), (r), __FILE__, __LINE__)
+#define PI_UNREF(p, r) pi_unref_dbg((p), (r), __FILE__, __LINE__)
 
 #else /* defined(GRPC_PI_REF_COUNT_DEBUG) */
 
-#define PI_ADD_REF(p, r) pi_add_ref((p), 1)
-#define PI_UNREF(p, r) pi_unref((p), 1)
+#define PI_ADD_REF(p, r) pi_add_ref((p))
+#define PI_UNREF(p, r) pi_unref((p))
 
 #endif /* !defined(GPRC_PI_REF_COUNT_DEBUG) */
 
@@ -164,7 +165,7 @@ typedef struct polling_island {
      Once the ref count becomes zero, this structure is destroyed which means
      we should ensure that there is never a scenario where a PI_ADD_REF() is
      racing with a PI_UNREF() that just made the ref_count zero. */
-  gpr_atm ref_count;
+  gpr_refcount ref_count;
 
   /* Pointer to the polling_island this merged into.
    * merged_to value is only set once in polling_island's lifetime (and that too
@@ -281,50 +282,42 @@ gpr_atm g_epoll_sync;
 #endif /* defined(GRPC_TSAN) */
 
 #ifdef GRPC_PI_REF_COUNT_DEBUG
-long pi_add_ref(polling_island *pi, int ref_cnt);
-long pi_unref(polling_island *pi, int ref_cnt);
+void pi_add_ref(polling_island *pi);
+void pi_unref(polling_island *pi);
 
-void pi_add_ref_dbg(polling_island *pi, int ref_cnt, char *reason, char *file,
-                    int line) {
-  long old_cnt = pi_add_ref(pi, ref_cnt);
-  gpr_log(GPR_DEBUG, "Add ref pi: %p, old:%ld -> new:%ld (%s) - (%s, %d)",
-          (void *)pi, old_cnt, (old_cnt + ref_cnt), reason, file, line);
+void pi_add_ref_dbg(polling_island *pi, char *reason, char *file, int line) {
+  long old_cnt = gpr_atm_acq_load(&(pi->ref_count.count));
+  pi_add_ref(pi);
+  gpr_log(GPR_DEBUG, "Add ref pi: %p, old: %ld -> new:%ld (%s) - (%s, %d)",
+          (void *)pi, old_cnt, old_cnt + 1, reason, file, line);
 }
 
-void pi_unref_dbg(polling_island *pi, int ref_cnt, char *reason, char *file,
-                  int line) {
-  long old_cnt = pi_unref(pi, ref_cnt);
+void pi_unref_dbg(polling_island *pi, char *reason, char *file, int line) {
+  long old_cnt = gpr_atm_acq_load(&(pi->ref_count.count));
+  pi_unref(pi);
   gpr_log(GPR_DEBUG, "Unref pi: %p, old:%ld -> new:%ld (%s) - (%s, %d)",
-          (void *)pi, old_cnt, (old_cnt - ref_cnt), reason, file, line);
+          (void *)pi, old_cnt, (old_cnt - 1), reason, file, line);
 }
 #endif
 
-long pi_add_ref(polling_island *pi, int ref_cnt) {
-  return gpr_atm_full_fetch_add(&pi->ref_count, ref_cnt);
-}
-
-long pi_unref(polling_island *pi, int ref_cnt) {
-  long old_cnt = gpr_atm_full_fetch_add(&pi->ref_count, -ref_cnt);
+void pi_add_ref(polling_island *pi) { gpr_ref(&pi->ref_count); }
 
-  /* If ref count went to zero, delete the polling island. Note that this need
-     not be done under a lock. Once the ref count goes to zero, we are
-     guaranteed that no one else holds a reference to the polling island (and
-     that there is no racing pi_add_ref() call either.
+void pi_unref(polling_island *pi) {
+  /* If ref count went to zero, delete the polling island.
+     Note that this deletion not be done under a lock. Once the ref count goes
+     to zero, we are guaranteed that no one else holds a reference to the
+     polling island (and that there is no racing pi_add_ref() call either).
 
      Also, if we are deleting the polling island and the merged_to field is
      non-empty, we should remove a ref to the merged_to polling island
    */
-  if (old_cnt == ref_cnt) {
+  if (gpr_unref(&pi->ref_count)) {
     polling_island *next = (polling_island *)gpr_atm_acq_load(&pi->merged_to);
     polling_island_delete(pi);
     if (next != NULL) {
       PI_UNREF(next, "pi_delete"); /* Recursive call */
     }
-  } else {
-    GPR_ASSERT(old_cnt > ref_cnt);
   }
-
-  return old_cnt;
 }
 
 /* The caller is expected to hold pi->mu lock before calling this function */
@@ -482,7 +475,7 @@ static polling_island *polling_island_create(grpc_fd *initial_fd,
     pi->fds = NULL;
   }
 
-  gpr_atm_rel_store(&pi->ref_count, (gpr_atm)0);
+  gpr_ref_init(&pi->ref_count, 0);
   gpr_atm_rel_store(&pi->merged_to, (gpr_atm)NULL);
 
   pi->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
@@ -762,8 +755,8 @@ static gpr_mu fd_freelist_mu;
 #define UNREF_BY(fd, n, reason) unref_by(fd, n, reason, __FILE__, __LINE__)
 static void ref_by(grpc_fd *fd, int n, const char *reason, const char *file,
                    int line) {
-  gpr_log(GPR_DEBUG, "FD %d %p   ref %d %d -> %d [%s; %s:%d]", fd->fd, fd, n,
-          gpr_atm_no_barrier_load(&fd->refst),
+  gpr_log(GPR_DEBUG, "FD %d %p   ref %d %ld -> %ld [%s; %s:%d]", fd->fd,
+          (void *)fd, n, gpr_atm_no_barrier_load(&fd->refst),
           gpr_atm_no_barrier_load(&fd->refst) + n, reason, file, line);
 #else
 #define REF_BY(fd, n, reason) ref_by(fd, n)
@@ -777,8 +770,8 @@ static void ref_by(grpc_fd *fd, int n) {
 static void unref_by(grpc_fd *fd, int n, const char *reason, const char *file,
                      int line) {
   gpr_atm old;
-  gpr_log(GPR_DEBUG, "FD %d %p unref %d %d -> %d [%s; %s:%d]", fd->fd, fd, n,
-          gpr_atm_no_barrier_load(&fd->refst),
+  gpr_log(GPR_DEBUG, "FD %d %p unref %d %ld -> %ld [%s; %s:%d]", fd->fd,
+          (void *)fd, n, gpr_atm_no_barrier_load(&fd->refst),
           gpr_atm_no_barrier_load(&fd->refst) - n, reason, file, line);
 #else
 static void unref_by(grpc_fd *fd, int n) {
@@ -865,10 +858,10 @@ static grpc_fd *fd_create(int fd, const char *name) {
   char *fd_name;
   gpr_asprintf(&fd_name, "%s fd=%d", name, fd);
   grpc_iomgr_register_object(&new_fd->iomgr_object, fd_name);
-  gpr_free(fd_name);
 #ifdef GRPC_FD_REF_COUNT_DEBUG
-  gpr_log(GPR_DEBUG, "FD %d %p create %s", fd, r, fd_name);
+  gpr_log(GPR_DEBUG, "FD %d %p create %s", fd, (void *)new_fd, fd_name);
 #endif
+  gpr_free(fd_name);
   return new_fd;
 }
 

From eb5e43762be40f78775dfd3728e105daf1169d90 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Thu, 23 Jun 2016 16:16:10 -0700
Subject: [PATCH 200/280] Fix ruby tests

---
 tools/run_tests/run_tests.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index c571a81eb28..61cef0a9d57 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -451,7 +451,7 @@ class RubyLanguage(object):
     _check_compiler(self.args.compiler, ['default'])
 
   def test_specs(self):
-    return [self.config.job_spec(['tools/run_tests/run_ruby.sh'], None,
+    return [self.config.job_spec(['tools/run_tests/run_ruby.sh'],
                                  timeout_seconds=10*60,
                                  environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
 

From 2e1a1fe56f4276d670362c5aae1b493df0834c2e Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Thu, 23 Jun 2016 16:18:31 -0700
Subject: [PATCH 201/280] Fixes

---
 tools/run_tests/dockerjob.py             | 4 ++--
 tools/run_tests/run_performance_tests.py | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/run_tests/dockerjob.py b/tools/run_tests/dockerjob.py
index 326c4faed95..e4ca3b7faaf 100755
--- a/tools/run_tests/dockerjob.py
+++ b/tools/run_tests/dockerjob.py
@@ -104,7 +104,7 @@ class DockerJob:
 
   def __init__(self, spec):
     self._spec = spec
-    self._job = jobset.Job(spec, bin_hash=None, newline_on_success=True, travis=True, add_env={})
+    self._job = jobset.Job(spec, newline_on_success=True, travis=True, add_env={})
     self._container_name = spec.container_name
 
   def mapped_port(self, port):
@@ -118,4 +118,4 @@ class DockerJob:
 
   def is_running(self):
     """Polls a job and returns True if given job is still running."""
-    return self._job.state(jobset.NoCache()) == jobset._RUNNING
+    return self._job.state() == jobset._RUNNING
diff --git a/tools/run_tests/run_performance_tests.py b/tools/run_tests/run_performance_tests.py
index f037d0d17d9..14901caf07f 100755
--- a/tools/run_tests/run_performance_tests.py
+++ b/tools/run_tests/run_performance_tests.py
@@ -61,11 +61,11 @@ class QpsWorkerJob:
     self._spec = spec
     self.language = language
     self.host_and_port = host_and_port
-    self._job = jobset.Job(spec, bin_hash=None, newline_on_success=True, travis=True, add_env={})
+    self._job = jobset.Job(spec, newline_on_success=True, travis=True, add_env={})
 
   def is_running(self):
     """Polls a job and returns True if given job is still running."""
-    return self._job.state(jobset.NoCache()) == jobset._RUNNING
+    return self._job.state() == jobset._RUNNING
 
   def kill(self):
     return self._job.kill()

From d6f8f0b7cd9c1e92219027919eb8a562763e029b Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Thu, 23 Jun 2016 17:33:01 -0700
Subject: [PATCH 202/280] Add TODO

---
 src/objective-c/examples/SwiftSample/ViewController.swift | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/objective-c/examples/SwiftSample/ViewController.swift b/src/objective-c/examples/SwiftSample/ViewController.swift
index 80d7a47917f..2a95d2de516 100644
--- a/src/objective-c/examples/SwiftSample/ViewController.swift
+++ b/src/objective-c/examples/SwiftSample/ViewController.swift
@@ -71,6 +71,7 @@ class ViewController: UIViewController {
       NSLog("2. Response trailers: \(RPC.responseTrailers)")
     }
 
+    // TODO(jcanizales): Revert to using subscript syntax once XCode 8 is released.
     RPC.requestHeaders.setObject("My value", forKey: "My-Header")
 
     RPC.start()

From 33b767a7701c373767bf29a49c93c9e515eb17f8 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Fri, 24 Jun 2016 09:13:03 -0700
Subject: [PATCH 203/280] fix build node package

---
 tools/run_tests/build_package_node.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/run_tests/build_package_node.sh b/tools/run_tests/build_package_node.sh
index 6f7211b53fe..ff4cfdb8bf9 100755
--- a/tools/run_tests/build_package_node.sh
+++ b/tools/run_tests/build_package_node.sh
@@ -86,6 +86,7 @@ for arch in {x86,x64}; do
     cp $input_dir/protoc* bin/
     cp $input_dir/grpc_node_plugin* bin/
     mkdir -p bin/google/protobuf
+    mkdir -p bin/google/protobuf/compiler  # needed for plugin.proto
     for proto in "${well_known_protos[@]}"; do
       cp $base/third_party/protobuf/src/google/protobuf/$proto.proto bin/google/protobuf/$proto.proto
     done

From e07b83ba9fde162fe0e61f97c657492f4d948e95 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Fri, 24 Jun 2016 09:27:00 -0700
Subject: [PATCH 204/280] generate_projects.sh

---
 src/node/tools/package.json | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/node/tools/package.json b/src/node/tools/package.json
index d4849c2e388..c34b259e2e0 100644
--- a/src/node/tools/package.json
+++ b/src/node/tools/package.json
@@ -34,6 +34,7 @@
     "index.js",
     "bin/protoc.js",
     "bin/protoc_plugin.js",
+    "bin/google/protobuf",
     "LICENSE"
   ],
   "main": "index.js"

From 886c512832464a5aa5e61b51f1fcd1da356ca847 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Fri, 24 Jun 2016 09:48:58 -0700
Subject: [PATCH 205/280] fix C# nuget build

---
 src/csharp/Grpc.Core/Grpc.Core.nuspec | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/src/csharp/Grpc.Core/Grpc.Core.nuspec b/src/csharp/Grpc.Core/Grpc.Core.nuspec
index fa2c1fbff22..47593f787b1 100644
--- a/src/csharp/Grpc.Core/Grpc.Core.nuspec
+++ b/src/csharp/Grpc.Core/Grpc.Core.nuspec
@@ -24,11 +24,12 @@
     <file src="bin/ReleaseSigned/Grpc.Core.xml" target="lib/net45" />
     <file src="**\*.cs" target="src" />
     <file src="Grpc.Core.targets" target="\build\net45\Grpc.Core.targets" />
-    <file src="../nativelibs/windows_x86/grpc_csharp_ext.dll" target="/build/native/bin/windows_x86/grpc_csharp_ext.dll" />
-    <file src="../nativelibs/windows_x64/grpc_csharp_ext.dll" target="/build/native/bin/windows_x64/grpc_csharp_ext.dll" />
-    <file src="../nativelibs/linux_x86/libgrpc_csharp_ext.so" target="/build/native/bin/linux_x86/libgrpc_csharp_ext.so" />
-    <file src="../nativelibs/linux_x64/libgrpc_csharp_ext.so" target="/build/native/bin/linux_x64/libgrpc_csharp_ext.so" />
-    <file src="../nativelibs/macosx_x86/libgrpc_csharp_ext.dylib" target="/build/native/bin/macosx_x86/libgrpc_csharp_ext.dylib" />
-    <file src="../nativelibs/macosx_x64/libgrpc_csharp_ext.dylib" target="/build/native/bin/macosx_x64/libgrpc_csharp_ext.dylib" />
+    <!-- without backslashes in the the source path, nuget won't copy the files -->
+    <file src="..\nativelibs\windows_x86\grpc_csharp_ext.dll" target="/build/native/bin/windows_x86/grpc_csharp_ext.dll" />
+    <file src="..\nativelibs\windows_x64\grpc_csharp_ext.dll" target="/build/native/bin/windows_x64/grpc_csharp_ext.dll" />
+    <file src="..\nativelibs\linux_x86\libgrpc_csharp_ext.so" target="/build/native/bin/linux_x86/libgrpc_csharp_ext.so" />
+    <file src="..\nativelibs\linux_x64\libgrpc_csharp_ext.so" target="/build/native/bin/linux_x64/libgrpc_csharp_ext.so" />
+    <file src="..\nativelibs\macosx_x86\libgrpc_csharp_ext.dylib" target="/build/native/bin/macosx_x86/libgrpc_csharp_ext.dylib" />
+    <file src="..\nativelibs\macosx_x64\libgrpc_csharp_ext.dylib" target="/build/native/bin/macosx_x64/libgrpc_csharp_ext.dylib" />
   </files>
 </package>

From d29a3bf004e23eb481b33b9a69fd10ae9221fc98 Mon Sep 17 00:00:00 2001
From: murgatroid99 <mlumish@google.com>
Date: Fri, 24 Jun 2016 10:26:14 -0700
Subject: [PATCH 206/280] Update master branch to 0.16.0-dev

---
 Makefile                                          | 2 +-
 build.yaml                                        | 2 +-
 package.json                                      | 2 +-
 package.xml                                       | 4 ++--
 src/core/lib/surface/version.c                    | 2 +-
 src/csharp/Grpc.Auth/project.json                 | 4 ++--
 src/csharp/Grpc.Core/VersionInfo.cs               | 4 ++--
 src/csharp/Grpc.Core/project.json                 | 2 +-
 src/csharp/Grpc.HealthCheck/project.json          | 4 ++--
 src/csharp/build_packages.bat                     | 2 +-
 src/node/tools/package.json                       | 2 +-
 src/python/grpcio/grpc_version.py                 | 2 +-
 src/ruby/lib/grpc/version.rb                      | 2 +-
 src/ruby/tools/version.rb                         | 2 +-
 tools/distrib/python/grpcio_tools/grpc_version.py | 2 +-
 tools/doxygen/Doxyfile.c++                        | 2 +-
 tools/doxygen/Doxyfile.c++.internal               | 2 +-
 tools/doxygen/Doxyfile.core                       | 2 +-
 tools/doxygen/Doxyfile.core.internal              | 2 +-
 19 files changed, 23 insertions(+), 23 deletions(-)

diff --git a/Makefile b/Makefile
index 9be3e5784cc..2f49e7712fd 100644
--- a/Makefile
+++ b/Makefile
@@ -414,7 +414,7 @@ E = @echo
 Q = @
 endif
 
-VERSION = 0.15.0-dev
+VERSION = 0.16.0-dev
 
 CPPFLAGS_NO_ARCH += $(addprefix -I, $(INCLUDES)) $(addprefix -D, $(DEFINES))
 CPPFLAGS += $(CPPFLAGS_NO_ARCH) $(ARCH_FLAGS)
diff --git a/build.yaml b/build.yaml
index 1f06e20cf9b..7d570e4dab9 100644
--- a/build.yaml
+++ b/build.yaml
@@ -7,7 +7,7 @@ settings:
   '#3': Use "-preN" suffixes to identify pre-release versions
   '#4': Per-language overrides are possible with (eg) ruby_version tag here
   '#5': See the expand_version.py for all the quirks here
-  version: 0.15.0-dev
+  version: 0.16.0-dev
 filegroups:
 - name: census
   public_headers:
diff --git a/package.json b/package.json
index 5bdaa761e28..68a31d794c5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "grpc",
-  "version": "0.15.0-dev",
+  "version": "0.16.0-dev",
   "author": "Google Inc.",
   "description": "gRPC Library for Node",
   "homepage": "http://www.grpc.io/",
diff --git a/package.xml b/package.xml
index 67e9bb2c282..c1ecae8b806 100644
--- a/package.xml
+++ b/package.xml
@@ -13,8 +13,8 @@
  <date>2016-05-19</date>
  <time>16:06:07</time>
  <version>
-  <release>0.15.0</release>
-  <api>0.15.0</api>
+  <release>0.16.0</release>
+  <api>0.16.0</api>
  </version>
  <stability>
   <release>beta</release>
diff --git a/src/core/lib/surface/version.c b/src/core/lib/surface/version.c
index aca76d2bb79..53f3c438541 100644
--- a/src/core/lib/surface/version.c
+++ b/src/core/lib/surface/version.c
@@ -36,4 +36,4 @@
 
 #include <grpc/grpc.h>
 
-const char *grpc_version_string(void) { return "0.15.0-dev"; }
+const char *grpc_version_string(void) { return "0.16.0-dev"; }
diff --git a/src/csharp/Grpc.Auth/project.json b/src/csharp/Grpc.Auth/project.json
index 1677565824b..4c5c960204e 100644
--- a/src/csharp/Grpc.Auth/project.json
+++ b/src/csharp/Grpc.Auth/project.json
@@ -1,5 +1,5 @@
 {
-  "version": "0.15.0-dev",
+  "version": "0.16.0-dev",
   "title": "gRPC C# Auth",
   "authors": [ "Google Inc." ],
   "copyright": "Copyright 2015, Google Inc.",
@@ -13,7 +13,7 @@
     "tags": [ "gRPC RPC Protocol HTTP/2 Auth OAuth2" ],
   },
   "dependencies": {
-    "Grpc.Core": "0.15.0-dev",
+    "Grpc.Core": "0.16.0-dev",
     "Google.Apis.Auth": "1.11.1"
   },
   "frameworks": {
diff --git a/src/csharp/Grpc.Core/VersionInfo.cs b/src/csharp/Grpc.Core/VersionInfo.cs
index e1609341d9a..cb20967680e 100644
--- a/src/csharp/Grpc.Core/VersionInfo.cs
+++ b/src/csharp/Grpc.Core/VersionInfo.cs
@@ -48,11 +48,11 @@ namespace Grpc.Core
         /// <summary>
         /// Current <c>AssemblyFileVersion</c> of gRPC C# assemblies
         /// </summary>
-        public const string CurrentAssemblyFileVersion = "0.15.0.0";
+        public const string CurrentAssemblyFileVersion = "0.16.0.0";
 
         /// <summary>
         /// Current version of gRPC C#
         /// </summary>
-        public const string CurrentVersion = "0.15.0-dev";
+        public const string CurrentVersion = "0.16.0-dev";
     }
 }
diff --git a/src/csharp/Grpc.Core/project.json b/src/csharp/Grpc.Core/project.json
index 7253107e04a..4729a9346cb 100644
--- a/src/csharp/Grpc.Core/project.json
+++ b/src/csharp/Grpc.Core/project.json
@@ -1,5 +1,5 @@
 {
-  "version": "0.15.0-dev",
+  "version": "0.16.0-dev",
   "title": "gRPC C# Core",
   "authors": [ "Google Inc." ],
   "copyright": "Copyright 2015, Google Inc.",
diff --git a/src/csharp/Grpc.HealthCheck/project.json b/src/csharp/Grpc.HealthCheck/project.json
index eb57608957a..c4895c2ad3c 100644
--- a/src/csharp/Grpc.HealthCheck/project.json
+++ b/src/csharp/Grpc.HealthCheck/project.json
@@ -1,5 +1,5 @@
 {
-  "version": "0.15.0-dev",
+  "version": "0.16.0-dev",
   "title": "gRPC C# Healthchecking",
   "authors": [ "Google Inc." ],
   "copyright": "Copyright 2015, Google Inc.",
@@ -13,7 +13,7 @@
     "tags": [ "gRPC health check" ]
   },
   "dependencies": {
-    "Grpc.Core": "0.15.0-dev",
+    "Grpc.Core": "0.16.0-dev",
     "Google.Protobuf": "3.0.0-beta3"
   },
   "frameworks": {
diff --git a/src/csharp/build_packages.bat b/src/csharp/build_packages.bat
index 63f8c30bc7e..272b30f385d 100644
--- a/src/csharp/build_packages.bat
+++ b/src/csharp/build_packages.bat
@@ -30,7 +30,7 @@
 @rem Builds gRPC NuGet packages
 
 @rem Current package versions
-set VERSION=0.15.0-dev
+set VERSION=0.16.0-dev
 set PROTOBUF_VERSION=3.0.0-beta3
 
 @rem Packages that depend on prerelease packages (like Google.Protobuf) need to have prerelease suffix as well.
diff --git a/src/node/tools/package.json b/src/node/tools/package.json
index c34b259e2e0..7c256d7ba0d 100644
--- a/src/node/tools/package.json
+++ b/src/node/tools/package.json
@@ -1,6 +1,6 @@
 {
   "name": "grpc-tools",
-  "version": "0.15.0-dev",
+  "version": "0.16.0-dev",
   "author": "Google Inc.",
   "description": "Tools for developing with gRPC on Node.js",
   "homepage": "http://www.grpc.io/",
diff --git a/src/python/grpcio/grpc_version.py b/src/python/grpcio/grpc_version.py
index 0c13104d9da..0f4db9d972e 100644
--- a/src/python/grpcio/grpc_version.py
+++ b/src/python/grpcio/grpc_version.py
@@ -29,4 +29,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio/grpc_version.py.template`!!!
 
-VERSION='0.15.0.dev0'
+VERSION='0.16.0.dev0'
diff --git a/src/ruby/lib/grpc/version.rb b/src/ruby/lib/grpc/version.rb
index 01c8c5ac8f1..5e6aaef2eb5 100644
--- a/src/ruby/lib/grpc/version.rb
+++ b/src/ruby/lib/grpc/version.rb
@@ -29,5 +29,5 @@
 
 # GRPC contains the General RPC module.
 module GRPC
-  VERSION = '0.15.0.dev'
+  VERSION = '0.16.0.dev'
 end
diff --git a/src/ruby/tools/version.rb b/src/ruby/tools/version.rb
index dca7fd7e72c..68c1bf369d2 100644
--- a/src/ruby/tools/version.rb
+++ b/src/ruby/tools/version.rb
@@ -29,6 +29,6 @@
 
 module GRPC
   module Tools
-    VERSION = '0.15.0.dev'
+    VERSION = '0.16.0.dev'
   end
 end
diff --git a/tools/distrib/python/grpcio_tools/grpc_version.py b/tools/distrib/python/grpcio_tools/grpc_version.py
index 1267d0e45dc..4b1e7fcd584 100644
--- a/tools/distrib/python/grpcio_tools/grpc_version.py
+++ b/tools/distrib/python/grpcio_tools/grpc_version.py
@@ -29,4 +29,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/tools/distrib/python/grpcio_tools/grpc_version.py.template`!!!
 
-VERSION='0.15.0.dev0'
+VERSION='0.16.0.dev0'
diff --git a/tools/doxygen/Doxyfile.c++ b/tools/doxygen/Doxyfile.c++
index 7f9d2df6f6c..de7acd7777e 100644
--- a/tools/doxygen/Doxyfile.c++
+++ b/tools/doxygen/Doxyfile.c++
@@ -40,7 +40,7 @@ PROJECT_NAME           = "GRPC C++"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 0.15.0-dev
+PROJECT_NUMBER         = 0.16.0-dev
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/tools/doxygen/Doxyfile.c++.internal b/tools/doxygen/Doxyfile.c++.internal
index dcf1a4c8c40..76bb3b6c59e 100644
--- a/tools/doxygen/Doxyfile.c++.internal
+++ b/tools/doxygen/Doxyfile.c++.internal
@@ -40,7 +40,7 @@ PROJECT_NAME           = "GRPC C++"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 0.15.0-dev
+PROJECT_NUMBER         = 0.16.0-dev
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/tools/doxygen/Doxyfile.core b/tools/doxygen/Doxyfile.core
index 72102b2fc50..53ae4e4cf4b 100644
--- a/tools/doxygen/Doxyfile.core
+++ b/tools/doxygen/Doxyfile.core
@@ -40,7 +40,7 @@ PROJECT_NAME           = "GRPC Core"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 0.15.0-dev
+PROJECT_NUMBER         = 0.16.0-dev
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index e1555930e91..1c75c941c27 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -40,7 +40,7 @@ PROJECT_NAME           = "GRPC Core"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 0.15.0-dev
+PROJECT_NUMBER         = 0.16.0-dev
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a

From f4c1bff0d8caedf716b460c4ee6114ac126e8872 Mon Sep 17 00:00:00 2001
From: Ken Payson <kpayson@google.com>
Date: Sun, 12 Jun 2016 15:23:36 -0700
Subject: [PATCH 207/280] Moved grpc_shutdown to end of Py_Finalize()

We currently rely on the __del__ method of a module scope object
to call grpc_shutdown().  __del__ methods are not guaranteed
to be called, and furthermore there are no guarantees about
ordering, leading to shutdown race conditions.  This moves
grpc_shutdown to Py_Finalize(), which gets called after the
Python context is completely cleaned up.
---
 .../grpcio/grpc/_cython/_cygrpc/grpc.pxi      |  1 +
 src/python/grpcio/grpc/_cython/cygrpc.pyx     | 32 +++++++------------
 src/python/grpcio/grpc/_cython/loader.c       |  7 ++++
 src/python/grpcio/grpc/_cython/loader.h       |  5 +++
 4 files changed, 24 insertions(+), 21 deletions(-)

diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
index 05b8886df73..35e394d02f8 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
@@ -37,6 +37,7 @@ cdef extern from "grpc/_cython/loader.h":
   ctypedef long int64_t
 
   int pygrpc_load_core(char*)
+  int pygrpc_initialize_core()
 
   void *gpr_malloc(size_t size) nogil
   void gpr_free(void *ptr) nogil
diff --git a/src/python/grpcio/grpc/_cython/cygrpc.pyx b/src/python/grpcio/grpc/_cython/cygrpc.pyx
index cf146f5a048..c92a8d19a77 100644
--- a/src/python/grpcio/grpc/_cython/cygrpc.pyx
+++ b/src/python/grpcio/grpc/_cython/cygrpc.pyx
@@ -45,30 +45,20 @@ include "grpc/_cython/_cygrpc/security.pyx.pxi"
 include "grpc/_cython/_cygrpc/server.pyx.pxi"
 
 #
-# Global state
+# initialize gRPC
 #
 
-cdef class _ModuleState:
 
-  cdef bint is_loaded
+def _initialize():
+  if 'win32' in sys.platform:
+    filename = pkg_resources.resource_filename(
+        'grpc._cython', '_windows/grpc_c.64.python')
+    if not pygrpc_load_core(filename):
+      raise ImportError('failed to load core gRPC library')
+  if not pygrpc_initialize_core():
+    raise ImportError('failed to initialize core gRPC library')
 
-  def __cinit__(self):
-    if 'win32' in sys.platform:
-      filename = pkg_resources.resource_filename(
-          'grpc._cython', '_windows/grpc_c.64.python')
-      if not pygrpc_load_core(filename):
-        raise ImportError('failed to load core gRPC library')
-    with nogil:
-      grpc_init()
-    self.is_loaded = True
-    with nogil:
-      grpc_set_ssl_roots_override_callback(
+  grpc_set_ssl_roots_override_callback(
           <grpc_ssl_roots_override_callback>ssl_roots_override_callback)
 
-  def __dealloc__(self):
-    if self.is_loaded:
-      with nogil:
-        grpc_shutdown()
-
-_module_state = _ModuleState()
-
+_initialize()
diff --git a/src/python/grpcio/grpc/_cython/loader.c b/src/python/grpcio/grpc/_cython/loader.c
index b909ad594ed..86b70dbb02d 100644
--- a/src/python/grpcio/grpc/_cython/loader.c
+++ b/src/python/grpcio/grpc/_cython/loader.c
@@ -31,6 +31,7 @@
  *
  */
 
+#include <Python.h>
 #include "loader.h"
 
 #ifdef __cplusplus
@@ -62,6 +63,12 @@ int pygrpc_load_core(char *path) { return 1; }
 
 #endif  /* !GPR_WINDOWS */
 
+// Cython doesn't have Py_AtExit bindings, so we call the C_API directly
+int pygrpc_initialize_core(void) {
+  grpc_init();
+  return Py_AtExit(grpc_shutdown) < 0 ? 0 : 1;
+}
+
 #ifdef __cplusplus
 }
 #endif  /* __cpluslus */
diff --git a/src/python/grpcio/grpc/_cython/loader.h b/src/python/grpcio/grpc/_cython/loader.h
index 3b8796d39f7..eb4b1a1b018 100644
--- a/src/python/grpcio/grpc/_cython/loader.h
+++ b/src/python/grpcio/grpc/_cython/loader.h
@@ -46,6 +46,11 @@ extern "C" {
 /* Attempts to load the core if necessary, and return non-zero upon succes. */
 int pygrpc_load_core(char *path);
 
+/* Initializes grpc and registers grpc_shutdown() to be called right before
+ * interpreter exit.  Returns non-zero upon success.
+ */
+int pygrpc_initialize_core(void);
+
 #ifdef __cplusplus
 }
 #endif  /* __cpluslus */

From 2dfcf14705f24bdf6d95d1b16265beb52fe33b02 Mon Sep 17 00:00:00 2001
From: murgatroid99 <mlumish@google.com>
Date: Fri, 24 Jun 2016 11:06:28 -0700
Subject: [PATCH 208/280] Fix Node Windows build error

---
 src/node/ext/node_grpc.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/node/ext/node_grpc.cc b/src/node/ext/node_grpc.cc
index ce988f9dfa9..745b5023d59 100644
--- a/src/node/ext/node_grpc.cc
+++ b/src/node/ext/node_grpc.cc
@@ -265,8 +265,8 @@ void InitLogConstants(Local<Object> exports) {
   Nan::Set(log_verbosity, Nan::New("DEBUG").ToLocalChecked(), DEBUG);
   Local<Value> INFO(Nan::New<Uint32, uint32_t>(GPR_LOG_SEVERITY_INFO));
   Nan::Set(log_verbosity, Nan::New("INFO").ToLocalChecked(), INFO);
-  Local<Value> ERROR(Nan::New<Uint32, uint32_t>(GPR_LOG_SEVERITY_ERROR));
-  Nan::Set(log_verbosity, Nan::New("ERROR").ToLocalChecked(), ERROR);
+  Local<Value> LOG_ERROR(Nan::New<Uint32, uint32_t>(GPR_LOG_SEVERITY_ERROR));
+  Nan::Set(log_verbosity, Nan::New("ERROR").ToLocalChecked(), LOG_ERROR);
 }
 
 NAN_METHOD(MetadataKeyIsLegal) {

From f519df8147e80b6ef21a576e8e08742e4f957e87 Mon Sep 17 00:00:00 2001
From: murgatroid99 <mlumish@google.com>
Date: Fri, 24 Jun 2016 11:12:03 -0700
Subject: [PATCH 209/280] Update version to 0.15.0

---
 Makefile                                          | 2 +-
 build.yaml                                        | 2 +-
 package.json                                      | 2 +-
 src/core/lib/surface/version.c                    | 2 +-
 src/csharp/Grpc.Auth/project.json                 | 4 ++--
 src/csharp/Grpc.Core/VersionInfo.cs               | 2 +-
 src/csharp/Grpc.Core/project.json                 | 2 +-
 src/csharp/Grpc.HealthCheck/project.json          | 4 ++--
 src/csharp/build_packages.bat                     | 2 +-
 src/node/tools/package.json                       | 2 +-
 src/python/grpcio/grpc_version.py                 | 2 +-
 src/ruby/lib/grpc/version.rb                      | 2 +-
 src/ruby/tools/version.rb                         | 2 +-
 tools/distrib/python/grpcio_tools/grpc_version.py | 2 +-
 tools/doxygen/Doxyfile.c++                        | 2 +-
 tools/doxygen/Doxyfile.c++.internal               | 2 +-
 tools/doxygen/Doxyfile.core                       | 2 +-
 tools/doxygen/Doxyfile.core.internal              | 2 +-
 18 files changed, 20 insertions(+), 20 deletions(-)

diff --git a/Makefile b/Makefile
index 9be3e5784cc..d369653be3c 100644
--- a/Makefile
+++ b/Makefile
@@ -414,7 +414,7 @@ E = @echo
 Q = @
 endif
 
-VERSION = 0.15.0-dev
+VERSION = 0.15.0
 
 CPPFLAGS_NO_ARCH += $(addprefix -I, $(INCLUDES)) $(addprefix -D, $(DEFINES))
 CPPFLAGS += $(CPPFLAGS_NO_ARCH) $(ARCH_FLAGS)
diff --git a/build.yaml b/build.yaml
index 1f06e20cf9b..ffc681d9028 100644
--- a/build.yaml
+++ b/build.yaml
@@ -7,7 +7,7 @@ settings:
   '#3': Use "-preN" suffixes to identify pre-release versions
   '#4': Per-language overrides are possible with (eg) ruby_version tag here
   '#5': See the expand_version.py for all the quirks here
-  version: 0.15.0-dev
+  version: 0.15.0
 filegroups:
 - name: census
   public_headers:
diff --git a/package.json b/package.json
index 5bdaa761e28..1b2920c6bc4 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "grpc",
-  "version": "0.15.0-dev",
+  "version": "0.15.0",
   "author": "Google Inc.",
   "description": "gRPC Library for Node",
   "homepage": "http://www.grpc.io/",
diff --git a/src/core/lib/surface/version.c b/src/core/lib/surface/version.c
index aca76d2bb79..e4a3358c351 100644
--- a/src/core/lib/surface/version.c
+++ b/src/core/lib/surface/version.c
@@ -36,4 +36,4 @@
 
 #include <grpc/grpc.h>
 
-const char *grpc_version_string(void) { return "0.15.0-dev"; }
+const char *grpc_version_string(void) { return "0.15.0"; }
diff --git a/src/csharp/Grpc.Auth/project.json b/src/csharp/Grpc.Auth/project.json
index 1677565824b..ae83c3be2b8 100644
--- a/src/csharp/Grpc.Auth/project.json
+++ b/src/csharp/Grpc.Auth/project.json
@@ -1,5 +1,5 @@
 {
-  "version": "0.15.0-dev",
+  "version": "0.15.0",
   "title": "gRPC C# Auth",
   "authors": [ "Google Inc." ],
   "copyright": "Copyright 2015, Google Inc.",
@@ -13,7 +13,7 @@
     "tags": [ "gRPC RPC Protocol HTTP/2 Auth OAuth2" ],
   },
   "dependencies": {
-    "Grpc.Core": "0.15.0-dev",
+    "Grpc.Core": "0.15.0",
     "Google.Apis.Auth": "1.11.1"
   },
   "frameworks": {
diff --git a/src/csharp/Grpc.Core/VersionInfo.cs b/src/csharp/Grpc.Core/VersionInfo.cs
index e1609341d9a..d89a2b5c6ee 100644
--- a/src/csharp/Grpc.Core/VersionInfo.cs
+++ b/src/csharp/Grpc.Core/VersionInfo.cs
@@ -53,6 +53,6 @@ namespace Grpc.Core
         /// <summary>
         /// Current version of gRPC C#
         /// </summary>
-        public const string CurrentVersion = "0.15.0-dev";
+        public const string CurrentVersion = "0.15.0";
     }
 }
diff --git a/src/csharp/Grpc.Core/project.json b/src/csharp/Grpc.Core/project.json
index 7253107e04a..c7f2bf4fb12 100644
--- a/src/csharp/Grpc.Core/project.json
+++ b/src/csharp/Grpc.Core/project.json
@@ -1,5 +1,5 @@
 {
-  "version": "0.15.0-dev",
+  "version": "0.15.0",
   "title": "gRPC C# Core",
   "authors": [ "Google Inc." ],
   "copyright": "Copyright 2015, Google Inc.",
diff --git a/src/csharp/Grpc.HealthCheck/project.json b/src/csharp/Grpc.HealthCheck/project.json
index eb57608957a..98ea21a436a 100644
--- a/src/csharp/Grpc.HealthCheck/project.json
+++ b/src/csharp/Grpc.HealthCheck/project.json
@@ -1,5 +1,5 @@
 {
-  "version": "0.15.0-dev",
+  "version": "0.15.0",
   "title": "gRPC C# Healthchecking",
   "authors": [ "Google Inc." ],
   "copyright": "Copyright 2015, Google Inc.",
@@ -13,7 +13,7 @@
     "tags": [ "gRPC health check" ]
   },
   "dependencies": {
-    "Grpc.Core": "0.15.0-dev",
+    "Grpc.Core": "0.15.0",
     "Google.Protobuf": "3.0.0-beta3"
   },
   "frameworks": {
diff --git a/src/csharp/build_packages.bat b/src/csharp/build_packages.bat
index 63f8c30bc7e..e387efcc2da 100644
--- a/src/csharp/build_packages.bat
+++ b/src/csharp/build_packages.bat
@@ -30,7 +30,7 @@
 @rem Builds gRPC NuGet packages
 
 @rem Current package versions
-set VERSION=0.15.0-dev
+set VERSION=0.15.0
 set PROTOBUF_VERSION=3.0.0-beta3
 
 @rem Packages that depend on prerelease packages (like Google.Protobuf) need to have prerelease suffix as well.
diff --git a/src/node/tools/package.json b/src/node/tools/package.json
index c34b259e2e0..b2cadd3f47a 100644
--- a/src/node/tools/package.json
+++ b/src/node/tools/package.json
@@ -1,6 +1,6 @@
 {
   "name": "grpc-tools",
-  "version": "0.15.0-dev",
+  "version": "0.15.0",
   "author": "Google Inc.",
   "description": "Tools for developing with gRPC on Node.js",
   "homepage": "http://www.grpc.io/",
diff --git a/src/python/grpcio/grpc_version.py b/src/python/grpcio/grpc_version.py
index 0c13104d9da..c6c07afb443 100644
--- a/src/python/grpcio/grpc_version.py
+++ b/src/python/grpcio/grpc_version.py
@@ -29,4 +29,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio/grpc_version.py.template`!!!
 
-VERSION='0.15.0.dev0'
+VERSION='0.15.0'
diff --git a/src/ruby/lib/grpc/version.rb b/src/ruby/lib/grpc/version.rb
index 01c8c5ac8f1..7f512e47aab 100644
--- a/src/ruby/lib/grpc/version.rb
+++ b/src/ruby/lib/grpc/version.rb
@@ -29,5 +29,5 @@
 
 # GRPC contains the General RPC module.
 module GRPC
-  VERSION = '0.15.0.dev'
+  VERSION = '0.15.0'
 end
diff --git a/src/ruby/tools/version.rb b/src/ruby/tools/version.rb
index dca7fd7e72c..6a7a1d5bd33 100644
--- a/src/ruby/tools/version.rb
+++ b/src/ruby/tools/version.rb
@@ -29,6 +29,6 @@
 
 module GRPC
   module Tools
-    VERSION = '0.15.0.dev'
+    VERSION = '0.15.0'
   end
 end
diff --git a/tools/distrib/python/grpcio_tools/grpc_version.py b/tools/distrib/python/grpcio_tools/grpc_version.py
index 1267d0e45dc..9a33c6e5d14 100644
--- a/tools/distrib/python/grpcio_tools/grpc_version.py
+++ b/tools/distrib/python/grpcio_tools/grpc_version.py
@@ -29,4 +29,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/tools/distrib/python/grpcio_tools/grpc_version.py.template`!!!
 
-VERSION='0.15.0.dev0'
+VERSION='0.15.0'
diff --git a/tools/doxygen/Doxyfile.c++ b/tools/doxygen/Doxyfile.c++
index 7f9d2df6f6c..066d29ac001 100644
--- a/tools/doxygen/Doxyfile.c++
+++ b/tools/doxygen/Doxyfile.c++
@@ -40,7 +40,7 @@ PROJECT_NAME           = "GRPC C++"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 0.15.0-dev
+PROJECT_NUMBER         = 0.15.0
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/tools/doxygen/Doxyfile.c++.internal b/tools/doxygen/Doxyfile.c++.internal
index dcf1a4c8c40..6a0e8b2129c 100644
--- a/tools/doxygen/Doxyfile.c++.internal
+++ b/tools/doxygen/Doxyfile.c++.internal
@@ -40,7 +40,7 @@ PROJECT_NAME           = "GRPC C++"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 0.15.0-dev
+PROJECT_NUMBER         = 0.15.0
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/tools/doxygen/Doxyfile.core b/tools/doxygen/Doxyfile.core
index 72102b2fc50..fa9fd5a3123 100644
--- a/tools/doxygen/Doxyfile.core
+++ b/tools/doxygen/Doxyfile.core
@@ -40,7 +40,7 @@ PROJECT_NAME           = "GRPC Core"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 0.15.0-dev
+PROJECT_NUMBER         = 0.15.0
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index e1555930e91..e4c9f991d31 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -40,7 +40,7 @@ PROJECT_NAME           = "GRPC Core"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 0.15.0-dev
+PROJECT_NUMBER         = 0.15.0
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a

From be1b9a718a09722e95ab04b08ccaf353dc3a51e9 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Fri, 24 Jun 2016 13:22:11 -0700
Subject: [PATCH 210/280] Fixes

---
 src/core/lib/iomgr/error.c     | 5 ++++-
 src/core/lib/iomgr/tcp_posix.c | 4 ++--
 src/core/lib/surface/call.c    | 5 +++--
 3 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/src/core/lib/iomgr/error.c b/src/core/lib/iomgr/error.c
index 9f5ba76fd6c..aa94bb7fdf7 100644
--- a/src/core/lib/iomgr/error.c
+++ b/src/core/lib/iomgr/error.c
@@ -248,7 +248,10 @@ static grpc_error *copy_error_and_unref(grpc_error *in) {
   if (is_special(in)) {
     if (in == GRPC_ERROR_NONE) return GRPC_ERROR_CREATE("no error");
     if (in == GRPC_ERROR_OOM) return GRPC_ERROR_CREATE("oom");
-    if (in == GRPC_ERROR_CANCELLED) return GRPC_ERROR_CREATE("cancelled");
+    if (in == GRPC_ERROR_CANCELLED)
+      return grpc_error_set_int(GRPC_ERROR_CREATE("cancelled"),
+                                GRPC_ERROR_INT_GRPC_STATUS,
+                                GRPC_STATUS_CANCELLED);
     return GRPC_ERROR_CREATE("unknown");
   }
   grpc_error *out = gpr_malloc(sizeof(*out));
diff --git a/src/core/lib/iomgr/tcp_posix.c b/src/core/lib/iomgr/tcp_posix.c
index 017f52c3677..1046b60bcc9 100644
--- a/src/core/lib/iomgr/tcp_posix.c
+++ b/src/core/lib/iomgr/tcp_posix.c
@@ -160,7 +160,7 @@ static void call_read_cb(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp,
                          grpc_error *error) {
   grpc_closure *cb = tcp->read_cb;
 
-  if (false && grpc_tcp_trace) {
+  if (grpc_tcp_trace) {
     size_t i;
     const char *str = grpc_error_string(error);
     gpr_log(GPR_DEBUG, "read: error=%s", str);
@@ -394,7 +394,7 @@ static void tcp_write(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
   grpc_tcp *tcp = (grpc_tcp *)ep;
   grpc_error *error = GRPC_ERROR_NONE;
 
-  if (false && grpc_tcp_trace) {
+  if (grpc_tcp_trace) {
     size_t i;
 
     for (i = 0; i < buf->count; i++) {
diff --git a/src/core/lib/surface/call.c b/src/core/lib/surface/call.c
index 77c17a4975b..708ea3502af 100644
--- a/src/core/lib/surface/call.c
+++ b/src/core/lib/surface/call.c
@@ -407,9 +407,10 @@ static void set_status_code(grpc_call *call, status_source source,
 static void set_status_details(grpc_call *call, status_source source,
                                grpc_mdstr *status) {
   if (call->status[source].details != NULL) {
-    GRPC_MDSTR_UNREF(call->status[source].details);
+    GRPC_MDSTR_UNREF(status);
+  } else {
+    call->status[source].details = status;
   }
-  call->status[source].details = status;
 }
 
 static void get_final_status(grpc_call *call,

From bd96e8a6a38c0afe01c8bfcb0849d7f10ff634e8 Mon Sep 17 00:00:00 2001
From: Ken Payson <kpayson@google.com>
Date: Fri, 24 Jun 2016 11:53:54 -0700
Subject: [PATCH 211/280] Fix clang formatting

---
 .../ext/client_config/channel_connectivity.c     |  7 ++++---
 src/core/lib/profiling/basic_timers.c            |  8 ++++----
 .../security/credentials/jwt/jwt_credentials.c   |  8 ++++----
 src/core/lib/surface/channel.c                   | 16 +++++++++-------
 src/core/lib/surface/completion_queue.c          | 14 ++++++++------
 src/core/lib/transport/transport_op_string.c     |  2 +-
 6 files changed, 30 insertions(+), 25 deletions(-)

diff --git a/src/core/ext/client_config/channel_connectivity.c b/src/core/ext/client_config/channel_connectivity.c
index 2fd8e0e1232..c1220e3a8c3 100644
--- a/src/core/ext/client_config/channel_connectivity.c
+++ b/src/core/ext/client_config/channel_connectivity.c
@@ -189,10 +189,11 @@ void grpc_channel_watch_connectivity_state(
   GRPC_API_TRACE(
       "grpc_channel_watch_connectivity_state("
       "channel=%p, last_observed_state=%d, "
-      "deadline=gpr_timespec { tv_sec: %"PRId64", tv_nsec: %d, clock_type: %d }, "
+      "deadline=gpr_timespec { tv_sec: %" PRId64
+      ", tv_nsec: %d, clock_type: %d }, "
       "cq=%p, tag=%p)",
-      7, (channel, (int)last_observed_state, deadline.tv_sec,
-          deadline.tv_nsec, (int)deadline.clock_type, cq, tag));
+      7, (channel, (int)last_observed_state, deadline.tv_sec, deadline.tv_nsec,
+          (int)deadline.clock_type, cq, tag));
 
   grpc_cq_begin_op(cq, tag);
 
diff --git a/src/core/lib/profiling/basic_timers.c b/src/core/lib/profiling/basic_timers.c
index ee464f310f4..51813d04617 100644
--- a/src/core/lib/profiling/basic_timers.c
+++ b/src/core/lib/profiling/basic_timers.c
@@ -141,11 +141,11 @@ static void write_log(gpr_timer_log *log) {
       entry->tm = gpr_time_0(entry->tm.clock_type);
     }
     fprintf(output_file,
-            "{\"t\": %"PRId64".%09d, \"thd\": \"%d\", \"type\": \"%c\", \"tag\": "
+            "{\"t\": %" PRId64
+            ".%09d, \"thd\": \"%d\", \"type\": \"%c\", \"tag\": "
             "\"%s\", \"file\": \"%s\", \"line\": %d, \"imp\": %d}\n",
-            entry->tm.tv_sec, entry->tm.tv_nsec, entry->thd,
-            entry->type, entry->tagstr, entry->file, entry->line,
-            entry->important);
+            entry->tm.tv_sec, entry->tm.tv_nsec, entry->thd, entry->type,
+            entry->tagstr, entry->file, entry->line, entry->important);
   }
 }
 
diff --git a/src/core/lib/security/credentials/jwt/jwt_credentials.c b/src/core/lib/security/credentials/jwt/jwt_credentials.c
index f4dd9208610..1ae9f701fbd 100644
--- a/src/core/lib/security/credentials/jwt/jwt_credentials.c
+++ b/src/core/lib/security/credentials/jwt/jwt_credentials.c
@@ -149,11 +149,11 @@ grpc_call_credentials *grpc_service_account_jwt_access_credentials_create(
       "grpc_service_account_jwt_access_credentials_create("
       "json_key=%s, "
       "token_lifetime="
-      "gpr_timespec { tv_sec: %"PRId64", tv_nsec: %d, clock_type: %d }, "
+      "gpr_timespec { tv_sec: %" PRId64
+      ", tv_nsec: %d, clock_type: %d }, "
       "reserved=%p)",
-      5,
-      (json_key, token_lifetime.tv_sec, token_lifetime.tv_nsec,
-       (int)token_lifetime.clock_type, reserved));
+      5, (json_key, token_lifetime.tv_sec, token_lifetime.tv_nsec,
+          (int)token_lifetime.clock_type, reserved));
   GPR_ASSERT(reserved == NULL);
   return grpc_service_account_jwt_access_credentials_create_from_auth_json_key(
       grpc_auth_json_key_create_from_string(json_key), token_lifetime);
diff --git a/src/core/lib/surface/channel.c b/src/core/lib/surface/channel.c
index 952a769de1d..2cf6d8890a3 100644
--- a/src/core/lib/surface/channel.c
+++ b/src/core/lib/surface/channel.c
@@ -223,11 +223,12 @@ grpc_call *grpc_channel_create_call(grpc_channel *channel,
       "grpc_channel_create_call("
       "channel=%p, parent_call=%p, propagation_mask=%x, cq=%p, method=%s, "
       "host=%s, "
-      "deadline=gpr_timespec { tv_sec: %"PRId64", tv_nsec: %d, clock_type: %d }, "
+      "deadline=gpr_timespec { tv_sec: %" PRId64
+      ", tv_nsec: %d, clock_type: %d }, "
       "reserved=%p)",
-      10, (channel, parent_call, (unsigned)propagation_mask, cq, method, host,
-           deadline.tv_sec, deadline.tv_nsec,
-           (int)deadline.clock_type, reserved));
+      10,
+      (channel, parent_call, (unsigned)propagation_mask, cq, method, host,
+       deadline.tv_sec, deadline.tv_nsec, (int)deadline.clock_type, reserved));
   GPR_ASSERT(!reserved);
   return grpc_channel_create_call_internal(
       channel, parent_call, propagation_mask, cq, NULL,
@@ -282,11 +283,12 @@ grpc_call *grpc_channel_create_registered_call(
       "grpc_channel_create_registered_call("
       "channel=%p, parent_call=%p, propagation_mask=%x, completion_queue=%p, "
       "registered_call_handle=%p, "
-      "deadline=gpr_timespec { tv_sec: %"PRId64", tv_nsec: %d, clock_type: %d }, "
+      "deadline=gpr_timespec { tv_sec: %" PRId64
+      ", tv_nsec: %d, clock_type: %d }, "
       "reserved=%p)",
       9, (channel, parent_call, (unsigned)propagation_mask, completion_queue,
-          registered_call_handle, deadline.tv_sec,
-          deadline.tv_nsec, (int)deadline.clock_type, reserved));
+          registered_call_handle, deadline.tv_sec, deadline.tv_nsec,
+          (int)deadline.clock_type, reserved));
   GPR_ASSERT(!reserved);
   return grpc_channel_create_call_internal(
       channel, parent_call, propagation_mask, completion_queue, NULL,
diff --git a/src/core/lib/surface/completion_queue.c b/src/core/lib/surface/completion_queue.c
index aa35ae02fe2..b5f2f65e5c0 100644
--- a/src/core/lib/surface/completion_queue.c
+++ b/src/core/lib/surface/completion_queue.c
@@ -316,10 +316,11 @@ grpc_event grpc_completion_queue_next(grpc_completion_queue *cc,
   GRPC_API_TRACE(
       "grpc_completion_queue_next("
       "cc=%p, "
-      "deadline=gpr_timespec { tv_sec: %"PRId64", tv_nsec: %d, clock_type: %d }, "
+      "deadline=gpr_timespec { tv_sec: %" PRId64
+      ", tv_nsec: %d, clock_type: %d }, "
       "reserved=%p)",
-      5, (cc, deadline.tv_sec, deadline.tv_nsec,
-          (int)deadline.clock_type, reserved));
+      5, (cc, deadline.tv_sec, deadline.tv_nsec, (int)deadline.clock_type,
+          reserved));
   GPR_ASSERT(!reserved);
 
   deadline = gpr_convert_clock_type(deadline, GPR_CLOCK_MONOTONIC);
@@ -428,10 +429,11 @@ grpc_event grpc_completion_queue_pluck(grpc_completion_queue *cc, void *tag,
   GRPC_API_TRACE(
       "grpc_completion_queue_pluck("
       "cc=%p, tag=%p, "
-      "deadline=gpr_timespec { tv_sec: %"PRId64", tv_nsec: %d, clock_type: %d }, "
+      "deadline=gpr_timespec { tv_sec: %" PRId64
+      ", tv_nsec: %d, clock_type: %d }, "
       "reserved=%p)",
-      6, (cc, tag, deadline.tv_sec, deadline.tv_nsec,
-          (int)deadline.clock_type, reserved));
+      6, (cc, tag, deadline.tv_sec, deadline.tv_nsec, (int)deadline.clock_type,
+          reserved));
   GPR_ASSERT(!reserved);
 
   deadline = gpr_convert_clock_type(deadline, GPR_CLOCK_MONOTONIC);
diff --git a/src/core/lib/transport/transport_op_string.c b/src/core/lib/transport/transport_op_string.c
index d8fae7805e4..aeaba5339fd 100644
--- a/src/core/lib/transport/transport_op_string.c
+++ b/src/core/lib/transport/transport_op_string.c
@@ -63,7 +63,7 @@ static void put_metadata_list(gpr_strvec *b, grpc_metadata_batch md) {
   }
   if (gpr_time_cmp(md.deadline, gpr_inf_future(md.deadline.clock_type)) != 0) {
     char *tmp;
-    gpr_asprintf(&tmp, " deadline=%"PRId64".%09d", md.deadline.tv_sec,
+    gpr_asprintf(&tmp, " deadline=%" PRId64 ".%09d", md.deadline.tv_sec,
                  md.deadline.tv_nsec);
     gpr_strvec_add(b, tmp);
   }

From ddf02c1c3ff6efb15a9c47b5da7bd76b3654ad94 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Fri, 24 Jun 2016 14:04:01 -0700
Subject: [PATCH 212/280] Fix bad indentation

---
 tools/run_tests/jobset.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/run_tests/jobset.py b/tools/run_tests/jobset.py
index 40409c43948..4fe77487f96 100755
--- a/tools/run_tests/jobset.py
+++ b/tools/run_tests/jobset.py
@@ -363,7 +363,7 @@ class Jobset(object):
     self._running.add(job)
     if not self.resultset.has_key(job.GetSpec().shortname):
       self.resultset[job.GetSpec().shortname] = []
-      return True
+    return True
 
   def reap(self):
     """Collect the dead jobs."""

From d3b0dda9b8c5ac7dda843e46b240e99a3973d3b6 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Fri, 24 Jun 2016 15:13:08 -0700
Subject: [PATCH 213/280] update grpc nugets to 0.15

---
 examples/csharp/helloworld/.nuget/packages.config      |  2 +-
 examples/csharp/helloworld/Greeter/Greeter.csproj      | 10 +++++-----
 examples/csharp/helloworld/Greeter/packages.config     |  6 +++---
 .../helloworld/GreeterClient/GreeterClient.csproj      | 10 +++++-----
 .../csharp/helloworld/GreeterClient/packages.config    |  6 +++---
 .../helloworld/GreeterServer/GreeterServer.csproj      | 10 +++++-----
 .../csharp/helloworld/GreeterServer/packages.config    |  6 +++---
 examples/csharp/helloworld/generate_protos.bat         |  2 +-
 examples/csharp/route_guide/.nuget/packages.config     |  2 +-
 .../csharp/route_guide/RouteGuide/RouteGuide.csproj    | 10 +++++-----
 examples/csharp/route_guide/RouteGuide/packages.config |  6 +++---
 .../RouteGuideClient/RouteGuideClient.csproj           | 10 +++++-----
 .../route_guide/RouteGuideClient/packages.config       |  6 +++---
 .../RouteGuideServer/RouteGuideServer.csproj           | 10 +++++-----
 .../route_guide/RouteGuideServer/packages.config       |  6 +++---
 examples/csharp/route_guide/generate_protos.bat        |  2 +-
 16 files changed, 52 insertions(+), 52 deletions(-)

diff --git a/examples/csharp/helloworld/.nuget/packages.config b/examples/csharp/helloworld/.nuget/packages.config
index bfd6c6723d9..aa060800c19 100644
--- a/examples/csharp/helloworld/.nuget/packages.config
+++ b/examples/csharp/helloworld/.nuget/packages.config
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Grpc.Tools" version="0.14.0" />
+  <package id="Grpc.Tools" version="0.15.0" />
 </packages>
\ No newline at end of file
diff --git a/examples/csharp/helloworld/Greeter/Greeter.csproj b/examples/csharp/helloworld/Greeter/Greeter.csproj
index 0270cc25f7a..20b85db8b60 100644
--- a/examples/csharp/helloworld/Greeter/Greeter.csproj
+++ b/examples/csharp/helloworld/Greeter/Greeter.csproj
@@ -10,7 +10,7 @@
     <RootNamespace>Greeter</RootNamespace>
     <AssemblyName>Greeter</AssemblyName>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
-    <NuGetPackageImportStamp>745ac60f</NuGetPackageImportStamp>
+    <NuGetPackageImportStamp>2669b4f2</NuGetPackageImportStamp>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -33,11 +33,11 @@
   <ItemGroup>
     <Reference Include="Google.Protobuf, Version=3.0.0.0, Culture=neutral, PublicKeyToken=a7d26565bac4d604, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Protobuf.3.0.0-beta2\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
+      <HintPath>..\packages\Google.Protobuf.3.0.0-beta3\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
     </Reference>
     <Reference Include="Grpc.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Grpc.Core.0.14.0\lib\net45\Grpc.Core.dll</HintPath>
+      <HintPath>..\packages\Grpc.Core.0.15.0\lib\net45\Grpc.Core.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Interactive.Async, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
@@ -61,11 +61,11 @@
     <None Include="packages.config" />
   </ItemGroup>
   <ItemGroup />
-  <Import Project="..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets')" />
+  <Import Project="..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets')" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
     <PropertyGroup>
       <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
     </PropertyGroup>
-    <Error Condition="!Exists('..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets'))" />
+    <Error Condition="!Exists('..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets'))" />
   </Target>
 </Project>
\ No newline at end of file
diff --git a/examples/csharp/helloworld/Greeter/packages.config b/examples/csharp/helloworld/Greeter/packages.config
index 617fe6da7be..ff9d6bbf73f 100644
--- a/examples/csharp/helloworld/Greeter/packages.config
+++ b/examples/csharp/helloworld/Greeter/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.0.0-beta2" targetFramework="net45" />
-  <package id="Grpc" version="0.14.0" targetFramework="net45" />
-  <package id="Grpc.Core" version="0.14.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
+  <package id="Grpc" version="0.15.0" targetFramework="net45" />
+  <package id="Grpc.Core" version="0.15.0" targetFramework="net45" />
   <package id="Ix-Async" version="1.2.5" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/examples/csharp/helloworld/GreeterClient/GreeterClient.csproj b/examples/csharp/helloworld/GreeterClient/GreeterClient.csproj
index 877c450a50e..2b38ce290e9 100644
--- a/examples/csharp/helloworld/GreeterClient/GreeterClient.csproj
+++ b/examples/csharp/helloworld/GreeterClient/GreeterClient.csproj
@@ -10,7 +10,7 @@
     <RootNamespace>GreeterClient</RootNamespace>
     <AssemblyName>GreeterClient</AssemblyName>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
-    <NuGetPackageImportStamp>63b59176</NuGetPackageImportStamp>
+    <NuGetPackageImportStamp>5e942a7d</NuGetPackageImportStamp>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -33,11 +33,11 @@
   <ItemGroup>
     <Reference Include="Google.Protobuf, Version=3.0.0.0, Culture=neutral, PublicKeyToken=a7d26565bac4d604, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Protobuf.3.0.0-beta2\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
+      <HintPath>..\packages\Google.Protobuf.3.0.0-beta3\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
     </Reference>
     <Reference Include="Grpc.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Grpc.Core.0.14.0\lib\net45\Grpc.Core.dll</HintPath>
+      <HintPath>..\packages\Grpc.Core.0.15.0\lib\net45\Grpc.Core.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Interactive.Async, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
@@ -59,11 +59,11 @@
   <ItemGroup>
     <None Include="packages.config" />
   </ItemGroup>
-  <Import Project="..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets')" />
+  <Import Project="..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets')" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
     <PropertyGroup>
       <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
     </PropertyGroup>
-    <Error Condition="!Exists('..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets'))" />
+    <Error Condition="!Exists('..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets'))" />
   </Target>
 </Project>
\ No newline at end of file
diff --git a/examples/csharp/helloworld/GreeterClient/packages.config b/examples/csharp/helloworld/GreeterClient/packages.config
index 617fe6da7be..ff9d6bbf73f 100644
--- a/examples/csharp/helloworld/GreeterClient/packages.config
+++ b/examples/csharp/helloworld/GreeterClient/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.0.0-beta2" targetFramework="net45" />
-  <package id="Grpc" version="0.14.0" targetFramework="net45" />
-  <package id="Grpc.Core" version="0.14.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
+  <package id="Grpc" version="0.15.0" targetFramework="net45" />
+  <package id="Grpc.Core" version="0.15.0" targetFramework="net45" />
   <package id="Ix-Async" version="1.2.5" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/examples/csharp/helloworld/GreeterServer/GreeterServer.csproj b/examples/csharp/helloworld/GreeterServer/GreeterServer.csproj
index 4d792dcf32e..43c633678b1 100644
--- a/examples/csharp/helloworld/GreeterServer/GreeterServer.csproj
+++ b/examples/csharp/helloworld/GreeterServer/GreeterServer.csproj
@@ -10,7 +10,7 @@
     <RootNamespace>GreeterServer</RootNamespace>
     <AssemblyName>GreeterServer</AssemblyName>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
-    <NuGetPackageImportStamp>25ac2e80</NuGetPackageImportStamp>
+    <NuGetPackageImportStamp>9c7b2963</NuGetPackageImportStamp>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -33,11 +33,11 @@
   <ItemGroup>
     <Reference Include="Google.Protobuf, Version=3.0.0.0, Culture=neutral, PublicKeyToken=a7d26565bac4d604, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Protobuf.3.0.0-beta2\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
+      <HintPath>..\packages\Google.Protobuf.3.0.0-beta3\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
     </Reference>
     <Reference Include="Grpc.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Grpc.Core.0.14.0\lib\net45\Grpc.Core.dll</HintPath>
+      <HintPath>..\packages\Grpc.Core.0.15.0\lib\net45\Grpc.Core.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Interactive.Async, Version=1.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
@@ -59,11 +59,11 @@
   <ItemGroup>
     <None Include="packages.config" />
   </ItemGroup>
-  <Import Project="..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets')" />
+  <Import Project="..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets')" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
     <PropertyGroup>
       <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
     </PropertyGroup>
-    <Error Condition="!Exists('..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets'))" />
+    <Error Condition="!Exists('..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets'))" />
   </Target>
 </Project>
\ No newline at end of file
diff --git a/examples/csharp/helloworld/GreeterServer/packages.config b/examples/csharp/helloworld/GreeterServer/packages.config
index 617fe6da7be..ff9d6bbf73f 100644
--- a/examples/csharp/helloworld/GreeterServer/packages.config
+++ b/examples/csharp/helloworld/GreeterServer/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.0.0-beta2" targetFramework="net45" />
-  <package id="Grpc" version="0.14.0" targetFramework="net45" />
-  <package id="Grpc.Core" version="0.14.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
+  <package id="Grpc" version="0.15.0" targetFramework="net45" />
+  <package id="Grpc.Core" version="0.15.0" targetFramework="net45" />
   <package id="Ix-Async" version="1.2.5" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/examples/csharp/helloworld/generate_protos.bat b/examples/csharp/helloworld/generate_protos.bat
index b9f68d6745a..a952bb46cdc 100644
--- a/examples/csharp/helloworld/generate_protos.bat
+++ b/examples/csharp/helloworld/generate_protos.bat
@@ -34,7 +34,7 @@ setlocal
 @rem enter this directory
 cd /d %~dp0
 
-set TOOLS_PATH=packages\Grpc.Tools.0.14.0\tools\windows_x86
+set TOOLS_PATH=packages\Grpc.Tools.0.15.0\tools\windows_x86
 
 %TOOLS_PATH%\protoc.exe -I../../protos --csharp_out Greeter  ../../protos/helloworld.proto --grpc_out Greeter --plugin=protoc-gen-grpc=%TOOLS_PATH%\grpc_csharp_plugin.exe
 
diff --git a/examples/csharp/route_guide/.nuget/packages.config b/examples/csharp/route_guide/.nuget/packages.config
index bfd6c6723d9..aa060800c19 100644
--- a/examples/csharp/route_guide/.nuget/packages.config
+++ b/examples/csharp/route_guide/.nuget/packages.config
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Grpc.Tools" version="0.14.0" />
+  <package id="Grpc.Tools" version="0.15.0" />
 </packages>
\ No newline at end of file
diff --git a/examples/csharp/route_guide/RouteGuide/RouteGuide.csproj b/examples/csharp/route_guide/RouteGuide/RouteGuide.csproj
index 4f7222ebba3..601d16ba24d 100644
--- a/examples/csharp/route_guide/RouteGuide/RouteGuide.csproj
+++ b/examples/csharp/route_guide/RouteGuide/RouteGuide.csproj
@@ -11,7 +11,7 @@
     <AssemblyName>RouteGuide</AssemblyName>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
-    <NuGetPackageImportStamp>0a9fcb7a</NuGetPackageImportStamp>
+    <NuGetPackageImportStamp>de2137f9</NuGetPackageImportStamp>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -33,11 +33,11 @@
   <ItemGroup>
     <Reference Include="Google.Protobuf, Version=3.0.0.0, Culture=neutral, PublicKeyToken=a7d26565bac4d604, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Protobuf.3.0.0-beta2\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
+      <HintPath>..\packages\Google.Protobuf.3.0.0-beta3\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
     </Reference>
     <Reference Include="Grpc.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Grpc.Core.0.14.0\lib\net45\Grpc.Core.dll</HintPath>
+      <HintPath>..\packages\Grpc.Core.0.15.0\lib\net45\Grpc.Core.dll</HintPath>
     </Reference>
     <Reference Include="Newtonsoft.Json, Version=7.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
@@ -74,12 +74,12 @@
     </None>
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
-  <Import Project="..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets')" />
+  <Import Project="..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets')" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
     <PropertyGroup>
       <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
     </PropertyGroup>
-    <Error Condition="!Exists('..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets'))" />
+    <Error Condition="!Exists('..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets'))" />
   </Target>
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
diff --git a/examples/csharp/route_guide/RouteGuide/packages.config b/examples/csharp/route_guide/RouteGuide/packages.config
index b16bfedd310..b962a7232a9 100644
--- a/examples/csharp/route_guide/RouteGuide/packages.config
+++ b/examples/csharp/route_guide/RouteGuide/packages.config
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.0.0-beta2" targetFramework="net45" />
-  <package id="Grpc" version="0.14.0" targetFramework="net45" />
-  <package id="Grpc.Core" version="0.14.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
+  <package id="Grpc" version="0.15.0" targetFramework="net45" />
+  <package id="Grpc.Core" version="0.15.0" targetFramework="net45" />
   <package id="Ix-Async" version="1.2.5" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/examples/csharp/route_guide/RouteGuideClient/RouteGuideClient.csproj b/examples/csharp/route_guide/RouteGuideClient/RouteGuideClient.csproj
index c3700f65c6d..6f5c0a50dd4 100644
--- a/examples/csharp/route_guide/RouteGuideClient/RouteGuideClient.csproj
+++ b/examples/csharp/route_guide/RouteGuideClient/RouteGuideClient.csproj
@@ -11,7 +11,7 @@
     <AssemblyName>RouteGuideClient</AssemblyName>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
-    <NuGetPackageImportStamp>8ef088f0</NuGetPackageImportStamp>
+    <NuGetPackageImportStamp>b880049a</NuGetPackageImportStamp>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <PlatformTarget>AnyCPU</PlatformTarget>
@@ -35,11 +35,11 @@
   <ItemGroup>
     <Reference Include="Google.Protobuf, Version=3.0.0.0, Culture=neutral, PublicKeyToken=a7d26565bac4d604, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Protobuf.3.0.0-beta2\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
+      <HintPath>..\packages\Google.Protobuf.3.0.0-beta3\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
     </Reference>
     <Reference Include="Grpc.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Grpc.Core.0.14.0\lib\net45\Grpc.Core.dll</HintPath>
+      <HintPath>..\packages\Grpc.Core.0.15.0\lib\net45\Grpc.Core.dll</HintPath>
     </Reference>
     <Reference Include="Newtonsoft.Json, Version=7.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
@@ -71,12 +71,12 @@
     </ProjectReference>
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
-  <Import Project="..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets')" />
+  <Import Project="..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets')" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
     <PropertyGroup>
       <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
     </PropertyGroup>
-    <Error Condition="!Exists('..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets'))" />
+    <Error Condition="!Exists('..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets'))" />
   </Target>
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
diff --git a/examples/csharp/route_guide/RouteGuideClient/packages.config b/examples/csharp/route_guide/RouteGuideClient/packages.config
index b16bfedd310..b962a7232a9 100644
--- a/examples/csharp/route_guide/RouteGuideClient/packages.config
+++ b/examples/csharp/route_guide/RouteGuideClient/packages.config
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.0.0-beta2" targetFramework="net45" />
-  <package id="Grpc" version="0.14.0" targetFramework="net45" />
-  <package id="Grpc.Core" version="0.14.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
+  <package id="Grpc" version="0.15.0" targetFramework="net45" />
+  <package id="Grpc.Core" version="0.15.0" targetFramework="net45" />
   <package id="Ix-Async" version="1.2.5" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/examples/csharp/route_guide/RouteGuideServer/RouteGuideServer.csproj b/examples/csharp/route_guide/RouteGuideServer/RouteGuideServer.csproj
index e7ecbc150f1..5bf46b05b89 100644
--- a/examples/csharp/route_guide/RouteGuideServer/RouteGuideServer.csproj
+++ b/examples/csharp/route_guide/RouteGuideServer/RouteGuideServer.csproj
@@ -11,7 +11,7 @@
     <AssemblyName>RouteGuideServer</AssemblyName>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
-    <NuGetPackageImportStamp>d5246467</NuGetPackageImportStamp>
+    <NuGetPackageImportStamp>946ecc79</NuGetPackageImportStamp>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <PlatformTarget>AnyCPU</PlatformTarget>
@@ -35,11 +35,11 @@
   <ItemGroup>
     <Reference Include="Google.Protobuf, Version=3.0.0.0, Culture=neutral, PublicKeyToken=a7d26565bac4d604, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Protobuf.3.0.0-beta2\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
+      <HintPath>..\packages\Google.Protobuf.3.0.0-beta3\lib\portable-net45+netcore45+wpa81+wp8\Google.Protobuf.dll</HintPath>
     </Reference>
     <Reference Include="Grpc.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Grpc.Core.0.14.0\lib\net45\Grpc.Core.dll</HintPath>
+      <HintPath>..\packages\Grpc.Core.0.15.0\lib\net45\Grpc.Core.dll</HintPath>
     </Reference>
     <Reference Include="Newtonsoft.Json, Version=7.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
@@ -72,12 +72,12 @@
     </ProjectReference>
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
-  <Import Project="..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets')" />
+  <Import Project="..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets" Condition="Exists('..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets')" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
     <PropertyGroup>
       <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
     </PropertyGroup>
-    <Error Condition="!Exists('..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Core.0.14.0\build\net45\Grpc.Core.targets'))" />
+    <Error Condition="!Exists('..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Grpc.Core.0.15.0\build\net45\Grpc.Core.targets'))" />
   </Target>
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
diff --git a/examples/csharp/route_guide/RouteGuideServer/packages.config b/examples/csharp/route_guide/RouteGuideServer/packages.config
index b16bfedd310..b962a7232a9 100644
--- a/examples/csharp/route_guide/RouteGuideServer/packages.config
+++ b/examples/csharp/route_guide/RouteGuideServer/packages.config
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Google.Protobuf" version="3.0.0-beta2" targetFramework="net45" />
-  <package id="Grpc" version="0.14.0" targetFramework="net45" />
-  <package id="Grpc.Core" version="0.14.0" targetFramework="net45" />
+  <package id="Google.Protobuf" version="3.0.0-beta3" targetFramework="net45" />
+  <package id="Grpc" version="0.15.0" targetFramework="net45" />
+  <package id="Grpc.Core" version="0.15.0" targetFramework="net45" />
   <package id="Ix-Async" version="1.2.5" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/examples/csharp/route_guide/generate_protos.bat b/examples/csharp/route_guide/generate_protos.bat
index 72c5ba3e99f..dbdbd1f172f 100644
--- a/examples/csharp/route_guide/generate_protos.bat
+++ b/examples/csharp/route_guide/generate_protos.bat
@@ -34,7 +34,7 @@ setlocal
 @rem enter this directory
 cd /d %~dp0
 
-set TOOLS_PATH=packages\Grpc.Tools.0.14.0\tools\windows_x86
+set TOOLS_PATH=packages\Grpc.Tools.0.15.0\tools\windows_x86
 
 %TOOLS_PATH%\protoc.exe -I../../protos --csharp_out RouteGuide  ../../protos/route_guide.proto --grpc_out RouteGuide --plugin=protoc-gen-grpc=%TOOLS_PATH%\grpc_csharp_plugin.exe
 

From 09685d224ee3cf3735f0564fcbf92e8acc994293 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Fri, 24 Jun 2016 15:15:55 -0700
Subject: [PATCH 214/280] regenerate files

---
 .../csharp/helloworld/Greeter/Helloworld.cs   |  10 +-
 .../helloworld/Greeter/HelloworldGrpc.cs      |  64 +------
 .../route_guide/RouteGuide/RouteGuide.cs      |  16 +-
 .../route_guide/RouteGuide/RouteGuideGrpc.cs  | 161 +-----------------
 4 files changed, 31 insertions(+), 220 deletions(-)

diff --git a/examples/csharp/helloworld/Greeter/Helloworld.cs b/examples/csharp/helloworld/Greeter/Helloworld.cs
index 3cacdebe27e..6477b4f35be 100644
--- a/examples/csharp/helloworld/Greeter/Helloworld.cs
+++ b/examples/csharp/helloworld/Greeter/Helloworld.cs
@@ -31,9 +31,9 @@ namespace Helloworld {
             "cm90bzM="));
       descriptor = pbr::FileDescriptor.FromGeneratedCode(descriptorData,
           new pbr::FileDescriptor[] { },
-          new pbr::GeneratedCodeInfo(null, new pbr::GeneratedCodeInfo[] {
-            new pbr::GeneratedCodeInfo(typeof(global::Helloworld.HelloRequest), global::Helloworld.HelloRequest.Parser, new[]{ "Name" }, null, null, null),
-            new pbr::GeneratedCodeInfo(typeof(global::Helloworld.HelloReply), global::Helloworld.HelloReply.Parser, new[]{ "Message" }, null, null, null)
+          new pbr::GeneratedClrTypeInfo(null, new pbr::GeneratedClrTypeInfo[] {
+            new pbr::GeneratedClrTypeInfo(typeof(global::Helloworld.HelloRequest), global::Helloworld.HelloRequest.Parser, new[]{ "Name" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Helloworld.HelloReply), global::Helloworld.HelloReply.Parser, new[]{ "Message" }, null, null, null)
           }));
     }
     #endregion
@@ -76,7 +76,7 @@ namespace Helloworld {
     public string Name {
       get { return name_; }
       set {
-        name_ = pb::Preconditions.CheckNotNull(value, "value");
+        name_ = pb::ProtoPreconditions.CheckNotNull(value, "value");
       }
     }
 
@@ -182,7 +182,7 @@ namespace Helloworld {
     public string Message {
       get { return message_; }
       set {
-        message_ = pb::Preconditions.CheckNotNull(value, "value");
+        message_ = pb::ProtoPreconditions.CheckNotNull(value, "value");
       }
     }
 
diff --git a/examples/csharp/helloworld/Greeter/HelloworldGrpc.cs b/examples/csharp/helloworld/Greeter/HelloworldGrpc.cs
index 405f3bd7248..041f5a78d75 100644
--- a/examples/csharp/helloworld/Greeter/HelloworldGrpc.cs
+++ b/examples/csharp/helloworld/Greeter/HelloworldGrpc.cs
@@ -61,38 +61,6 @@ namespace Helloworld {
       get { return global::Helloworld.HelloworldReflection.Descriptor.Services[0]; }
     }
 
-    /// <summary>Client for Greeter</summary>
-    [System.Obsolete("Client side interfaced will be removed in the next release. Use client class directly.")]
-    public interface IGreeterClient
-    {
-      /// <summary>
-      ///  Sends a greeting
-      /// </summary>
-      global::Helloworld.HelloReply SayHello(global::Helloworld.HelloRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  Sends a greeting
-      /// </summary>
-      global::Helloworld.HelloReply SayHello(global::Helloworld.HelloRequest request, CallOptions options);
-      /// <summary>
-      ///  Sends a greeting
-      /// </summary>
-      AsyncUnaryCall<global::Helloworld.HelloReply> SayHelloAsync(global::Helloworld.HelloRequest request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  Sends a greeting
-      /// </summary>
-      AsyncUnaryCall<global::Helloworld.HelloReply> SayHelloAsync(global::Helloworld.HelloRequest request, CallOptions options);
-    }
-
-    /// <summary>Interface of server-side implementations of Greeter</summary>
-    [System.Obsolete("Service implementations should inherit from the generated abstract base class instead.")]
-    public interface IGreeter
-    {
-      /// <summary>
-      ///  Sends a greeting
-      /// </summary>
-      global::System.Threading.Tasks.Task<global::Helloworld.HelloReply> SayHello(global::Helloworld.HelloRequest request, ServerCallContext context);
-    }
-
     /// <summary>Base class for server-side implementations of Greeter</summary>
     public abstract class GreeterBase
     {
@@ -107,21 +75,24 @@ namespace Helloworld {
     }
 
     /// <summary>Client for Greeter</summary>
-    #pragma warning disable 0618
-    public class GreeterClient : ClientBase<GreeterClient>, IGreeterClient
-    #pragma warning restore 0618
+    public class GreeterClient : ClientBase<GreeterClient>
     {
+      /// <summary>Creates a new client for Greeter</summary>
+      /// <param name="channel">The channel to use to make remote calls.</param>
       public GreeterClient(Channel channel) : base(channel)
       {
       }
+      /// <summary>Creates a new client for Greeter that uses a custom <c>CallInvoker</c>.</summary>
+      /// <param name="callInvoker">The callInvoker to use to make remote calls.</param>
       public GreeterClient(CallInvoker callInvoker) : base(callInvoker)
       {
       }
-      ///<summary>Protected parameterless constructor to allow creation of test doubles.</summary>
+      /// <summary>Protected parameterless constructor to allow creation of test doubles.</summary>
       protected GreeterClient() : base()
       {
       }
-      ///<summary>Protected constructor to allow creation of configured clients.</summary>
+      /// <summary>Protected constructor to allow creation of configured clients.</summary>
+      /// <param name="configuration">The client configuration.</param>
       protected GreeterClient(ClientBaseConfiguration configuration) : base(configuration)
       {
       }
@@ -160,27 +131,10 @@ namespace Helloworld {
       }
     }
 
-    /// <summary>Creates a new client for Greeter</summary>
-    public static GreeterClient NewClient(Channel channel)
-    {
-      return new GreeterClient(channel);
-    }
-
-    /// <summary>Creates service definition that can be registered with a server</summary>
-    #pragma warning disable 0618
-    public static ServerServiceDefinition BindService(IGreeter serviceImpl)
-    #pragma warning restore 0618
-    {
-      return ServerServiceDefinition.CreateBuilder(__ServiceName)
-          .AddMethod(__Method_SayHello, serviceImpl.SayHello).Build();
-    }
-
     /// <summary>Creates service definition that can be registered with a server</summary>
-    #pragma warning disable 0618
     public static ServerServiceDefinition BindService(GreeterBase serviceImpl)
-    #pragma warning restore 0618
     {
-      return ServerServiceDefinition.CreateBuilder(__ServiceName)
+      return ServerServiceDefinition.CreateBuilder()
           .AddMethod(__Method_SayHello, serviceImpl.SayHello).Build();
     }
 
diff --git a/examples/csharp/route_guide/RouteGuide/RouteGuide.cs b/examples/csharp/route_guide/RouteGuide/RouteGuide.cs
index bcd77ec5f52..446113de9d5 100644
--- a/examples/csharp/route_guide/RouteGuide/RouteGuide.cs
+++ b/examples/csharp/route_guide/RouteGuide/RouteGuide.cs
@@ -41,12 +41,12 @@ namespace Routeguide {
             "ZUIPUm91dGVHdWlkZVByb3RvUAGiAgNSVEdiBnByb3RvMw=="));
       descriptor = pbr::FileDescriptor.FromGeneratedCode(descriptorData,
           new pbr::FileDescriptor[] { },
-          new pbr::GeneratedCodeInfo(null, new pbr::GeneratedCodeInfo[] {
-            new pbr::GeneratedCodeInfo(typeof(global::Routeguide.Point), global::Routeguide.Point.Parser, new[]{ "Latitude", "Longitude" }, null, null, null),
-            new pbr::GeneratedCodeInfo(typeof(global::Routeguide.Rectangle), global::Routeguide.Rectangle.Parser, new[]{ "Lo", "Hi" }, null, null, null),
-            new pbr::GeneratedCodeInfo(typeof(global::Routeguide.Feature), global::Routeguide.Feature.Parser, new[]{ "Name", "Location" }, null, null, null),
-            new pbr::GeneratedCodeInfo(typeof(global::Routeguide.RouteNote), global::Routeguide.RouteNote.Parser, new[]{ "Location", "Message" }, null, null, null),
-            new pbr::GeneratedCodeInfo(typeof(global::Routeguide.RouteSummary), global::Routeguide.RouteSummary.Parser, new[]{ "PointCount", "FeatureCount", "Distance", "ElapsedTime" }, null, null, null)
+          new pbr::GeneratedClrTypeInfo(null, new pbr::GeneratedClrTypeInfo[] {
+            new pbr::GeneratedClrTypeInfo(typeof(global::Routeguide.Point), global::Routeguide.Point.Parser, new[]{ "Latitude", "Longitude" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Routeguide.Rectangle), global::Routeguide.Rectangle.Parser, new[]{ "Lo", "Hi" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Routeguide.Feature), global::Routeguide.Feature.Parser, new[]{ "Name", "Location" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Routeguide.RouteNote), global::Routeguide.RouteNote.Parser, new[]{ "Location", "Message" }, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::Routeguide.RouteSummary), global::Routeguide.RouteSummary.Parser, new[]{ "PointCount", "FeatureCount", "Distance", "ElapsedTime" }, null, null, null)
           }));
     }
     #endregion
@@ -383,7 +383,7 @@ namespace Routeguide {
     public string Name {
       get { return name_; }
       set {
-        name_ = pb::Preconditions.CheckNotNull(value, "value");
+        name_ = pb::ProtoPreconditions.CheckNotNull(value, "value");
       }
     }
 
@@ -541,7 +541,7 @@ namespace Routeguide {
     public string Message {
       get { return message_; }
       set {
-        message_ = pb::Preconditions.CheckNotNull(value, "value");
+        message_ = pb::ProtoPreconditions.CheckNotNull(value, "value");
       }
     }
 
diff --git a/examples/csharp/route_guide/RouteGuide/RouteGuideGrpc.cs b/examples/csharp/route_guide/RouteGuide/RouteGuideGrpc.cs
index a59906d9c13..eb70c8e2db5 100644
--- a/examples/csharp/route_guide/RouteGuide/RouteGuideGrpc.cs
+++ b/examples/csharp/route_guide/RouteGuide/RouteGuideGrpc.cs
@@ -85,132 +85,6 @@ namespace Routeguide {
       get { return global::Routeguide.RouteGuideReflection.Descriptor.Services[0]; }
     }
 
-    /// <summary>Client for RouteGuide</summary>
-    [System.Obsolete("Client side interfaced will be removed in the next release. Use client class directly.")]
-    public interface IRouteGuideClient
-    {
-      /// <summary>
-      ///  A simple RPC.
-      ///
-      ///  Obtains the feature at a given position.
-      ///
-      ///  A feature with an empty name is returned if there's no feature at the given
-      ///  position.
-      /// </summary>
-      global::Routeguide.Feature GetFeature(global::Routeguide.Point request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  A simple RPC.
-      ///
-      ///  Obtains the feature at a given position.
-      ///
-      ///  A feature with an empty name is returned if there's no feature at the given
-      ///  position.
-      /// </summary>
-      global::Routeguide.Feature GetFeature(global::Routeguide.Point request, CallOptions options);
-      /// <summary>
-      ///  A simple RPC.
-      ///
-      ///  Obtains the feature at a given position.
-      ///
-      ///  A feature with an empty name is returned if there's no feature at the given
-      ///  position.
-      /// </summary>
-      AsyncUnaryCall<global::Routeguide.Feature> GetFeatureAsync(global::Routeguide.Point request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  A simple RPC.
-      ///
-      ///  Obtains the feature at a given position.
-      ///
-      ///  A feature with an empty name is returned if there's no feature at the given
-      ///  position.
-      /// </summary>
-      AsyncUnaryCall<global::Routeguide.Feature> GetFeatureAsync(global::Routeguide.Point request, CallOptions options);
-      /// <summary>
-      ///  A server-to-client streaming RPC.
-      ///
-      ///  Obtains the Features available within the given Rectangle.  Results are
-      ///  streamed rather than returned at once (e.g. in a response message with a
-      ///  repeated field), as the rectangle may cover a large area and contain a
-      ///  huge number of features.
-      /// </summary>
-      AsyncServerStreamingCall<global::Routeguide.Feature> ListFeatures(global::Routeguide.Rectangle request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  A server-to-client streaming RPC.
-      ///
-      ///  Obtains the Features available within the given Rectangle.  Results are
-      ///  streamed rather than returned at once (e.g. in a response message with a
-      ///  repeated field), as the rectangle may cover a large area and contain a
-      ///  huge number of features.
-      /// </summary>
-      AsyncServerStreamingCall<global::Routeguide.Feature> ListFeatures(global::Routeguide.Rectangle request, CallOptions options);
-      /// <summary>
-      ///  A client-to-server streaming RPC.
-      ///
-      ///  Accepts a stream of Points on a route being traversed, returning a
-      ///  RouteSummary when traversal is completed.
-      /// </summary>
-      AsyncClientStreamingCall<global::Routeguide.Point, global::Routeguide.RouteSummary> RecordRoute(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  A client-to-server streaming RPC.
-      ///
-      ///  Accepts a stream of Points on a route being traversed, returning a
-      ///  RouteSummary when traversal is completed.
-      /// </summary>
-      AsyncClientStreamingCall<global::Routeguide.Point, global::Routeguide.RouteSummary> RecordRoute(CallOptions options);
-      /// <summary>
-      ///  A Bidirectional streaming RPC.
-      ///
-      ///  Accepts a stream of RouteNotes sent while a route is being traversed,
-      ///  while receiving other RouteNotes (e.g. from other users).
-      /// </summary>
-      AsyncDuplexStreamingCall<global::Routeguide.RouteNote, global::Routeguide.RouteNote> RouteChat(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
-      /// <summary>
-      ///  A Bidirectional streaming RPC.
-      ///
-      ///  Accepts a stream of RouteNotes sent while a route is being traversed,
-      ///  while receiving other RouteNotes (e.g. from other users).
-      /// </summary>
-      AsyncDuplexStreamingCall<global::Routeguide.RouteNote, global::Routeguide.RouteNote> RouteChat(CallOptions options);
-    }
-
-    /// <summary>Interface of server-side implementations of RouteGuide</summary>
-    [System.Obsolete("Service implementations should inherit from the generated abstract base class instead.")]
-    public interface IRouteGuide
-    {
-      /// <summary>
-      ///  A simple RPC.
-      ///
-      ///  Obtains the feature at a given position.
-      ///
-      ///  A feature with an empty name is returned if there's no feature at the given
-      ///  position.
-      /// </summary>
-      global::System.Threading.Tasks.Task<global::Routeguide.Feature> GetFeature(global::Routeguide.Point request, ServerCallContext context);
-      /// <summary>
-      ///  A server-to-client streaming RPC.
-      ///
-      ///  Obtains the Features available within the given Rectangle.  Results are
-      ///  streamed rather than returned at once (e.g. in a response message with a
-      ///  repeated field), as the rectangle may cover a large area and contain a
-      ///  huge number of features.
-      /// </summary>
-      global::System.Threading.Tasks.Task ListFeatures(global::Routeguide.Rectangle request, IServerStreamWriter<global::Routeguide.Feature> responseStream, ServerCallContext context);
-      /// <summary>
-      ///  A client-to-server streaming RPC.
-      ///
-      ///  Accepts a stream of Points on a route being traversed, returning a
-      ///  RouteSummary when traversal is completed.
-      /// </summary>
-      global::System.Threading.Tasks.Task<global::Routeguide.RouteSummary> RecordRoute(IAsyncStreamReader<global::Routeguide.Point> requestStream, ServerCallContext context);
-      /// <summary>
-      ///  A Bidirectional streaming RPC.
-      ///
-      ///  Accepts a stream of RouteNotes sent while a route is being traversed,
-      ///  while receiving other RouteNotes (e.g. from other users).
-      /// </summary>
-      global::System.Threading.Tasks.Task RouteChat(IAsyncStreamReader<global::Routeguide.RouteNote> requestStream, IServerStreamWriter<global::Routeguide.RouteNote> responseStream, ServerCallContext context);
-    }
-
     /// <summary>Base class for server-side implementations of RouteGuide</summary>
     public abstract class RouteGuideBase
     {
@@ -265,21 +139,24 @@ namespace Routeguide {
     }
 
     /// <summary>Client for RouteGuide</summary>
-    #pragma warning disable 0618
-    public class RouteGuideClient : ClientBase<RouteGuideClient>, IRouteGuideClient
-    #pragma warning restore 0618
+    public class RouteGuideClient : ClientBase<RouteGuideClient>
     {
+      /// <summary>Creates a new client for RouteGuide</summary>
+      /// <param name="channel">The channel to use to make remote calls.</param>
       public RouteGuideClient(Channel channel) : base(channel)
       {
       }
+      /// <summary>Creates a new client for RouteGuide that uses a custom <c>CallInvoker</c>.</summary>
+      /// <param name="callInvoker">The callInvoker to use to make remote calls.</param>
       public RouteGuideClient(CallInvoker callInvoker) : base(callInvoker)
       {
       }
-      ///<summary>Protected parameterless constructor to allow creation of test doubles.</summary>
+      /// <summary>Protected parameterless constructor to allow creation of test doubles.</summary>
       protected RouteGuideClient() : base()
       {
       }
-      ///<summary>Protected constructor to allow creation of configured clients.</summary>
+      /// <summary>Protected constructor to allow creation of configured clients.</summary>
+      /// <param name="configuration">The client configuration.</param>
       protected RouteGuideClient(ClientBaseConfiguration configuration) : base(configuration)
       {
       }
@@ -402,30 +279,10 @@ namespace Routeguide {
       }
     }
 
-    /// <summary>Creates a new client for RouteGuide</summary>
-    public static RouteGuideClient NewClient(Channel channel)
-    {
-      return new RouteGuideClient(channel);
-    }
-
-    /// <summary>Creates service definition that can be registered with a server</summary>
-    #pragma warning disable 0618
-    public static ServerServiceDefinition BindService(IRouteGuide serviceImpl)
-    #pragma warning restore 0618
-    {
-      return ServerServiceDefinition.CreateBuilder(__ServiceName)
-          .AddMethod(__Method_GetFeature, serviceImpl.GetFeature)
-          .AddMethod(__Method_ListFeatures, serviceImpl.ListFeatures)
-          .AddMethod(__Method_RecordRoute, serviceImpl.RecordRoute)
-          .AddMethod(__Method_RouteChat, serviceImpl.RouteChat).Build();
-    }
-
     /// <summary>Creates service definition that can be registered with a server</summary>
-    #pragma warning disable 0618
     public static ServerServiceDefinition BindService(RouteGuideBase serviceImpl)
-    #pragma warning restore 0618
     {
-      return ServerServiceDefinition.CreateBuilder(__ServiceName)
+      return ServerServiceDefinition.CreateBuilder()
           .AddMethod(__Method_GetFeature, serviceImpl.GetFeature)
           .AddMethod(__Method_ListFeatures, serviceImpl.ListFeatures)
           .AddMethod(__Method_RecordRoute, serviceImpl.RecordRoute)

From 62a6c9216f906af50774ed1b729e62e2e761adf3 Mon Sep 17 00:00:00 2001
From: Ken Payson <kpayson@google.com>
Date: Fri, 24 Jun 2016 11:53:54 -0700
Subject: [PATCH 215/280] Fix clang formatting

---
 .../ext/client_config/channel_connectivity.c     |  7 ++++---
 src/core/lib/profiling/basic_timers.c            |  8 ++++----
 .../security/credentials/jwt/jwt_credentials.c   |  8 ++++----
 src/core/lib/surface/channel.c                   | 16 +++++++++-------
 src/core/lib/surface/completion_queue.c          | 14 ++++++++------
 src/core/lib/transport/transport_op_string.c     |  2 +-
 6 files changed, 30 insertions(+), 25 deletions(-)

diff --git a/src/core/ext/client_config/channel_connectivity.c b/src/core/ext/client_config/channel_connectivity.c
index 2fd8e0e1232..c1220e3a8c3 100644
--- a/src/core/ext/client_config/channel_connectivity.c
+++ b/src/core/ext/client_config/channel_connectivity.c
@@ -189,10 +189,11 @@ void grpc_channel_watch_connectivity_state(
   GRPC_API_TRACE(
       "grpc_channel_watch_connectivity_state("
       "channel=%p, last_observed_state=%d, "
-      "deadline=gpr_timespec { tv_sec: %"PRId64", tv_nsec: %d, clock_type: %d }, "
+      "deadline=gpr_timespec { tv_sec: %" PRId64
+      ", tv_nsec: %d, clock_type: %d }, "
       "cq=%p, tag=%p)",
-      7, (channel, (int)last_observed_state, deadline.tv_sec,
-          deadline.tv_nsec, (int)deadline.clock_type, cq, tag));
+      7, (channel, (int)last_observed_state, deadline.tv_sec, deadline.tv_nsec,
+          (int)deadline.clock_type, cq, tag));
 
   grpc_cq_begin_op(cq, tag);
 
diff --git a/src/core/lib/profiling/basic_timers.c b/src/core/lib/profiling/basic_timers.c
index ee464f310f4..51813d04617 100644
--- a/src/core/lib/profiling/basic_timers.c
+++ b/src/core/lib/profiling/basic_timers.c
@@ -141,11 +141,11 @@ static void write_log(gpr_timer_log *log) {
       entry->tm = gpr_time_0(entry->tm.clock_type);
     }
     fprintf(output_file,
-            "{\"t\": %"PRId64".%09d, \"thd\": \"%d\", \"type\": \"%c\", \"tag\": "
+            "{\"t\": %" PRId64
+            ".%09d, \"thd\": \"%d\", \"type\": \"%c\", \"tag\": "
             "\"%s\", \"file\": \"%s\", \"line\": %d, \"imp\": %d}\n",
-            entry->tm.tv_sec, entry->tm.tv_nsec, entry->thd,
-            entry->type, entry->tagstr, entry->file, entry->line,
-            entry->important);
+            entry->tm.tv_sec, entry->tm.tv_nsec, entry->thd, entry->type,
+            entry->tagstr, entry->file, entry->line, entry->important);
   }
 }
 
diff --git a/src/core/lib/security/credentials/jwt/jwt_credentials.c b/src/core/lib/security/credentials/jwt/jwt_credentials.c
index f4dd9208610..1ae9f701fbd 100644
--- a/src/core/lib/security/credentials/jwt/jwt_credentials.c
+++ b/src/core/lib/security/credentials/jwt/jwt_credentials.c
@@ -149,11 +149,11 @@ grpc_call_credentials *grpc_service_account_jwt_access_credentials_create(
       "grpc_service_account_jwt_access_credentials_create("
       "json_key=%s, "
       "token_lifetime="
-      "gpr_timespec { tv_sec: %"PRId64", tv_nsec: %d, clock_type: %d }, "
+      "gpr_timespec { tv_sec: %" PRId64
+      ", tv_nsec: %d, clock_type: %d }, "
       "reserved=%p)",
-      5,
-      (json_key, token_lifetime.tv_sec, token_lifetime.tv_nsec,
-       (int)token_lifetime.clock_type, reserved));
+      5, (json_key, token_lifetime.tv_sec, token_lifetime.tv_nsec,
+          (int)token_lifetime.clock_type, reserved));
   GPR_ASSERT(reserved == NULL);
   return grpc_service_account_jwt_access_credentials_create_from_auth_json_key(
       grpc_auth_json_key_create_from_string(json_key), token_lifetime);
diff --git a/src/core/lib/surface/channel.c b/src/core/lib/surface/channel.c
index 952a769de1d..2cf6d8890a3 100644
--- a/src/core/lib/surface/channel.c
+++ b/src/core/lib/surface/channel.c
@@ -223,11 +223,12 @@ grpc_call *grpc_channel_create_call(grpc_channel *channel,
       "grpc_channel_create_call("
       "channel=%p, parent_call=%p, propagation_mask=%x, cq=%p, method=%s, "
       "host=%s, "
-      "deadline=gpr_timespec { tv_sec: %"PRId64", tv_nsec: %d, clock_type: %d }, "
+      "deadline=gpr_timespec { tv_sec: %" PRId64
+      ", tv_nsec: %d, clock_type: %d }, "
       "reserved=%p)",
-      10, (channel, parent_call, (unsigned)propagation_mask, cq, method, host,
-           deadline.tv_sec, deadline.tv_nsec,
-           (int)deadline.clock_type, reserved));
+      10,
+      (channel, parent_call, (unsigned)propagation_mask, cq, method, host,
+       deadline.tv_sec, deadline.tv_nsec, (int)deadline.clock_type, reserved));
   GPR_ASSERT(!reserved);
   return grpc_channel_create_call_internal(
       channel, parent_call, propagation_mask, cq, NULL,
@@ -282,11 +283,12 @@ grpc_call *grpc_channel_create_registered_call(
       "grpc_channel_create_registered_call("
       "channel=%p, parent_call=%p, propagation_mask=%x, completion_queue=%p, "
       "registered_call_handle=%p, "
-      "deadline=gpr_timespec { tv_sec: %"PRId64", tv_nsec: %d, clock_type: %d }, "
+      "deadline=gpr_timespec { tv_sec: %" PRId64
+      ", tv_nsec: %d, clock_type: %d }, "
       "reserved=%p)",
       9, (channel, parent_call, (unsigned)propagation_mask, completion_queue,
-          registered_call_handle, deadline.tv_sec,
-          deadline.tv_nsec, (int)deadline.clock_type, reserved));
+          registered_call_handle, deadline.tv_sec, deadline.tv_nsec,
+          (int)deadline.clock_type, reserved));
   GPR_ASSERT(!reserved);
   return grpc_channel_create_call_internal(
       channel, parent_call, propagation_mask, completion_queue, NULL,
diff --git a/src/core/lib/surface/completion_queue.c b/src/core/lib/surface/completion_queue.c
index aa35ae02fe2..b5f2f65e5c0 100644
--- a/src/core/lib/surface/completion_queue.c
+++ b/src/core/lib/surface/completion_queue.c
@@ -316,10 +316,11 @@ grpc_event grpc_completion_queue_next(grpc_completion_queue *cc,
   GRPC_API_TRACE(
       "grpc_completion_queue_next("
       "cc=%p, "
-      "deadline=gpr_timespec { tv_sec: %"PRId64", tv_nsec: %d, clock_type: %d }, "
+      "deadline=gpr_timespec { tv_sec: %" PRId64
+      ", tv_nsec: %d, clock_type: %d }, "
       "reserved=%p)",
-      5, (cc, deadline.tv_sec, deadline.tv_nsec,
-          (int)deadline.clock_type, reserved));
+      5, (cc, deadline.tv_sec, deadline.tv_nsec, (int)deadline.clock_type,
+          reserved));
   GPR_ASSERT(!reserved);
 
   deadline = gpr_convert_clock_type(deadline, GPR_CLOCK_MONOTONIC);
@@ -428,10 +429,11 @@ grpc_event grpc_completion_queue_pluck(grpc_completion_queue *cc, void *tag,
   GRPC_API_TRACE(
       "grpc_completion_queue_pluck("
       "cc=%p, tag=%p, "
-      "deadline=gpr_timespec { tv_sec: %"PRId64", tv_nsec: %d, clock_type: %d }, "
+      "deadline=gpr_timespec { tv_sec: %" PRId64
+      ", tv_nsec: %d, clock_type: %d }, "
       "reserved=%p)",
-      6, (cc, tag, deadline.tv_sec, deadline.tv_nsec,
-          (int)deadline.clock_type, reserved));
+      6, (cc, tag, deadline.tv_sec, deadline.tv_nsec, (int)deadline.clock_type,
+          reserved));
   GPR_ASSERT(!reserved);
 
   deadline = gpr_convert_clock_type(deadline, GPR_CLOCK_MONOTONIC);
diff --git a/src/core/lib/transport/transport_op_string.c b/src/core/lib/transport/transport_op_string.c
index d8fae7805e4..aeaba5339fd 100644
--- a/src/core/lib/transport/transport_op_string.c
+++ b/src/core/lib/transport/transport_op_string.c
@@ -63,7 +63,7 @@ static void put_metadata_list(gpr_strvec *b, grpc_metadata_batch md) {
   }
   if (gpr_time_cmp(md.deadline, gpr_inf_future(md.deadline.clock_type)) != 0) {
     char *tmp;
-    gpr_asprintf(&tmp, " deadline=%"PRId64".%09d", md.deadline.tv_sec,
+    gpr_asprintf(&tmp, " deadline=%" PRId64 ".%09d", md.deadline.tv_sec,
                  md.deadline.tv_nsec);
     gpr_strvec_add(b, tmp);
   }

From 00ca8eaa1e9d3ad4b90cb6d10de04555b787f41b Mon Sep 17 00:00:00 2001
From: Jorge Canizales <jcanizales@google.com>
Date: Fri, 24 Jun 2016 16:02:56 -0700
Subject: [PATCH 216/280] Ignore deprecation warning in the test of deprecated
 feature

---
 src/objective-c/tests/InteropTests.m | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/objective-c/tests/InteropTests.m b/src/objective-c/tests/InteropTests.m
index d0f14d0fe2c..0ab16cc11bf 100644
--- a/src/objective-c/tests/InteropTests.m
+++ b/src/objective-c/tests/InteropTests.m
@@ -347,7 +347,10 @@ static cronet_engine *cronetEngine = NULL;
   [_service emptyCallWithRequest:request handler:^(RMTEmpty *response, NSError *error) {
     XCTAssertNil(error, @"First RPC finished with unexpected error: %@", error);
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
     [GRPCCall closeOpenConnections];
+#pragma clang diagnostic pop
 
     [_service emptyCallWithRequest:request handler:^(RMTEmpty *response, NSError *error) {
       XCTAssertNil(error, @"Second RPC finished with unexpected error: %@", error);

From 75fe9ba8b32c7a5945b23b1cc53a05c6a14617bd Mon Sep 17 00:00:00 2001
From: Jorge Canizales <jcanizales@google.com>
Date: Fri, 24 Jun 2016 16:03:25 -0700
Subject: [PATCH 217/280] Remove Unicode from the tests project

Cocoa pods 1.0.0 introduced it, and Jenkins might have a problem with it
---
 .../tests/Tests.xcodeproj/project.pbxproj     | 102 +++++++++---------
 1 file changed, 51 insertions(+), 51 deletions(-)

diff --git a/src/objective-c/tests/Tests.xcodeproj/project.pbxproj b/src/objective-c/tests/Tests.xcodeproj/project.pbxproj
index e895fe6c793..f9389a4977f 100644
--- a/src/objective-c/tests/Tests.xcodeproj/project.pbxproj
+++ b/src/objective-c/tests/Tests.xcodeproj/project.pbxproj
@@ -274,12 +274,12 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 63423F4D1B150A5F006CF63C /* Build configuration list for PBXNativeTarget "AllTests" */;
 			buildPhases = (
-				914ADDD7106BA9BB8A7E569F /* 📦 Check Pods Manifest.lock */,
+				914ADDD7106BA9BB8A7E569F /* [CP] Check Pods Manifest.lock */,
 				63423F401B150A5F006CF63C /* Sources */,
 				63423F411B150A5F006CF63C /* Frameworks */,
 				63423F421B150A5F006CF63C /* Resources */,
-				A441F71824DCB9D0CA297748 /* 📦 Copy Pods Resources */,
-				5F14F59509E10C2852014F9E /* 📦 Embed Pods Frameworks */,
+				A441F71824DCB9D0CA297748 /* [CP] Copy Pods Resources */,
+				5F14F59509E10C2852014F9E /* [CP] Embed Pods Frameworks */,
 			);
 			buildRules = (
 			);
@@ -295,11 +295,11 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 635697DB1B14FC11007A7283 /* Build configuration list for PBXNativeTarget "Tests" */;
 			buildPhases = (
-				796680C7599CB4ED736DD62A /* 📦 Check Pods Manifest.lock */,
+				796680C7599CB4ED736DD62A /* [CP] Check Pods Manifest.lock */,
 				635697C31B14FC11007A7283 /* Sources */,
 				635697C41B14FC11007A7283 /* Frameworks */,
 				635697C51B14FC11007A7283 /* CopyFiles */,
-				AEEBFC914CBAEE347382E8C4 /* 📦 Copy Pods Resources */,
+				AEEBFC914CBAEE347382E8C4 /* [CP] Copy Pods Resources */,
 			);
 			buildRules = (
 			);
@@ -314,12 +314,12 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 63DC841B1BE15179000708E8 /* Build configuration list for PBXNativeTarget "RxLibraryUnitTests" */;
 			buildPhases = (
-				B2986CEEE8CDD4901C97598B /* 📦 Check Pods Manifest.lock */,
+				B2986CEEE8CDD4901C97598B /* [CP] Check Pods Manifest.lock */,
 				63DC840F1BE15179000708E8 /* Sources */,
 				63DC84101BE15179000708E8 /* Frameworks */,
 				63DC84111BE15179000708E8 /* Resources */,
-				4F5690DC0E6AD6663FE78B8B /* 📦 Embed Pods Frameworks */,
-				C977426A8727267BBAC7D48E /* 📦 Copy Pods Resources */,
+				4F5690DC0E6AD6663FE78B8B /* [CP] Embed Pods Frameworks */,
+				C977426A8727267BBAC7D48E /* [CP] Copy Pods Resources */,
 			);
 			buildRules = (
 			);
@@ -335,12 +335,12 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 63DC842B1BE15267000708E8 /* Build configuration list for PBXNativeTarget "InteropTestsRemote" */;
 			buildPhases = (
-				4C406327D3907A5E5FBA8AC9 /* 📦 Check Pods Manifest.lock */,
+				4C406327D3907A5E5FBA8AC9 /* [CP] Check Pods Manifest.lock */,
 				63DC841F1BE15267000708E8 /* Sources */,
 				63DC84201BE15267000708E8 /* Frameworks */,
 				63DC84211BE15267000708E8 /* Resources */,
-				900B6EDD4D16BE7D765C3885 /* 📦 Embed Pods Frameworks */,
-				C2E09DC4BD239F71160F0CC1 /* 📦 Copy Pods Resources */,
+				900B6EDD4D16BE7D765C3885 /* [CP] Embed Pods Frameworks */,
+				C2E09DC4BD239F71160F0CC1 /* [CP] Copy Pods Resources */,
 			);
 			buildRules = (
 			);
@@ -356,12 +356,12 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 63DC843C1BE15294000708E8 /* Build configuration list for PBXNativeTarget "InteropTestsLocalSSL" */;
 			buildPhases = (
-				5C20DCCB71C3991E6FE78C22 /* 📦 Check Pods Manifest.lock */,
+				5C20DCCB71C3991E6FE78C22 /* [CP] Check Pods Manifest.lock */,
 				63DC84301BE15294000708E8 /* Sources */,
 				63DC84311BE15294000708E8 /* Frameworks */,
 				63DC84321BE15294000708E8 /* Resources */,
-				C591129ACE9F6CC5EE03FCDE /* 📦 Embed Pods Frameworks */,
-				693DD0B453431D64EA24FD66 /* 📦 Copy Pods Resources */,
+				C591129ACE9F6CC5EE03FCDE /* [CP] Embed Pods Frameworks */,
+				693DD0B453431D64EA24FD66 /* [CP] Copy Pods Resources */,
 			);
 			buildRules = (
 			);
@@ -377,12 +377,12 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 63DC844B1BE152B5000708E8 /* Build configuration list for PBXNativeTarget "InteropTestsLocalCleartext" */;
 			buildPhases = (
-				7418AC7B3844B29E48D24FC7 /* 📦 Check Pods Manifest.lock */,
+				7418AC7B3844B29E48D24FC7 /* [CP] Check Pods Manifest.lock */,
 				63DC843F1BE152B5000708E8 /* Sources */,
 				63DC84401BE152B5000708E8 /* Frameworks */,
 				63DC84411BE152B5000708E8 /* Resources */,
-				A8E3AC66DF770B774114A30E /* 📦 Embed Pods Frameworks */,
-				8AD3130D3C58A0FB32FF2A36 /* 📦 Copy Pods Resources */,
+				A8E3AC66DF770B774114A30E /* [CP] Embed Pods Frameworks */,
+				8AD3130D3C58A0FB32FF2A36 /* [CP] Copy Pods Resources */,
 			);
 			buildRules = (
 			);
@@ -486,14 +486,14 @@
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXShellScriptBuildPhase section */
-		4C406327D3907A5E5FBA8AC9 /* 📦 Check Pods Manifest.lock */ = {
+		4C406327D3907A5E5FBA8AC9 /* [CP] Check Pods Manifest.lock */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Check Pods Manifest.lock";
+			name = "[CP] Check Pods Manifest.lock";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -501,14 +501,14 @@
 			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [[ $? != 0 ]] ; then\n    cat << EOM\nerror: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\nEOM\n    exit 1\nfi\n";
 			showEnvVarsInLog = 0;
 		};
-		4F5690DC0E6AD6663FE78B8B /* 📦 Embed Pods Frameworks */ = {
+		4F5690DC0E6AD6663FE78B8B /* [CP] Embed Pods Frameworks */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Embed Pods Frameworks";
+			name = "[CP] Embed Pods Frameworks";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -516,14 +516,14 @@
 			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-RxLibraryUnitTests/Pods-RxLibraryUnitTests-frameworks.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
-		5C20DCCB71C3991E6FE78C22 /* 📦 Check Pods Manifest.lock */ = {
+		5C20DCCB71C3991E6FE78C22 /* [CP] Check Pods Manifest.lock */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Check Pods Manifest.lock";
+			name = "[CP] Check Pods Manifest.lock";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -531,14 +531,14 @@
 			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [[ $? != 0 ]] ; then\n    cat << EOM\nerror: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\nEOM\n    exit 1\nfi\n";
 			showEnvVarsInLog = 0;
 		};
-		5F14F59509E10C2852014F9E /* 📦 Embed Pods Frameworks */ = {
+		5F14F59509E10C2852014F9E /* [CP] Embed Pods Frameworks */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Embed Pods Frameworks";
+			name = "[CP] Embed Pods Frameworks";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -546,14 +546,14 @@
 			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-AllTests/Pods-AllTests-frameworks.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
-		693DD0B453431D64EA24FD66 /* 📦 Copy Pods Resources */ = {
+		693DD0B453431D64EA24FD66 /* [CP] Copy Pods Resources */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Copy Pods Resources";
+			name = "[CP] Copy Pods Resources";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -561,14 +561,14 @@
 			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-InteropTestsLocalSSL/Pods-InteropTestsLocalSSL-resources.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
-		7418AC7B3844B29E48D24FC7 /* 📦 Check Pods Manifest.lock */ = {
+		7418AC7B3844B29E48D24FC7 /* [CP] Check Pods Manifest.lock */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Check Pods Manifest.lock";
+			name = "[CP] Check Pods Manifest.lock";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -576,14 +576,14 @@
 			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [[ $? != 0 ]] ; then\n    cat << EOM\nerror: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\nEOM\n    exit 1\nfi\n";
 			showEnvVarsInLog = 0;
 		};
-		796680C7599CB4ED736DD62A /* 📦 Check Pods Manifest.lock */ = {
+		796680C7599CB4ED736DD62A /* [CP] Check Pods Manifest.lock */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Check Pods Manifest.lock";
+			name = "[CP] Check Pods Manifest.lock";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -591,14 +591,14 @@
 			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [[ $? != 0 ]] ; then\n    cat << EOM\nerror: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\nEOM\n    exit 1\nfi\n";
 			showEnvVarsInLog = 0;
 		};
-		8AD3130D3C58A0FB32FF2A36 /* 📦 Copy Pods Resources */ = {
+		8AD3130D3C58A0FB32FF2A36 /* [CP] Copy Pods Resources */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Copy Pods Resources";
+			name = "[CP] Copy Pods Resources";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -606,14 +606,14 @@
 			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-InteropTestsLocalCleartext/Pods-InteropTestsLocalCleartext-resources.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
-		900B6EDD4D16BE7D765C3885 /* 📦 Embed Pods Frameworks */ = {
+		900B6EDD4D16BE7D765C3885 /* [CP] Embed Pods Frameworks */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Embed Pods Frameworks";
+			name = "[CP] Embed Pods Frameworks";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -621,14 +621,14 @@
 			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-InteropTestsRemote/Pods-InteropTestsRemote-frameworks.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
-		914ADDD7106BA9BB8A7E569F /* 📦 Check Pods Manifest.lock */ = {
+		914ADDD7106BA9BB8A7E569F /* [CP] Check Pods Manifest.lock */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Check Pods Manifest.lock";
+			name = "[CP] Check Pods Manifest.lock";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -636,14 +636,14 @@
 			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [[ $? != 0 ]] ; then\n    cat << EOM\nerror: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\nEOM\n    exit 1\nfi\n";
 			showEnvVarsInLog = 0;
 		};
-		A441F71824DCB9D0CA297748 /* 📦 Copy Pods Resources */ = {
+		A441F71824DCB9D0CA297748 /* [CP] Copy Pods Resources */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Copy Pods Resources";
+			name = "[CP] Copy Pods Resources";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -651,14 +651,14 @@
 			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-AllTests/Pods-AllTests-resources.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
-		A8E3AC66DF770B774114A30E /* 📦 Embed Pods Frameworks */ = {
+		A8E3AC66DF770B774114A30E /* [CP] Embed Pods Frameworks */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Embed Pods Frameworks";
+			name = "[CP] Embed Pods Frameworks";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -666,14 +666,14 @@
 			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-InteropTestsLocalCleartext/Pods-InteropTestsLocalCleartext-frameworks.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
-		AEEBFC914CBAEE347382E8C4 /* 📦 Copy Pods Resources */ = {
+		AEEBFC914CBAEE347382E8C4 /* [CP] Copy Pods Resources */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Copy Pods Resources";
+			name = "[CP] Copy Pods Resources";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -681,14 +681,14 @@
 			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-Tests/Pods-Tests-resources.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
-		B2986CEEE8CDD4901C97598B /* 📦 Check Pods Manifest.lock */ = {
+		B2986CEEE8CDD4901C97598B /* [CP] Check Pods Manifest.lock */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Check Pods Manifest.lock";
+			name = "[CP] Check Pods Manifest.lock";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -696,14 +696,14 @@
 			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [[ $? != 0 ]] ; then\n    cat << EOM\nerror: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\nEOM\n    exit 1\nfi\n";
 			showEnvVarsInLog = 0;
 		};
-		C2E09DC4BD239F71160F0CC1 /* 📦 Copy Pods Resources */ = {
+		C2E09DC4BD239F71160F0CC1 /* [CP] Copy Pods Resources */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Copy Pods Resources";
+			name = "[CP] Copy Pods Resources";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -711,14 +711,14 @@
 			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-InteropTestsRemote/Pods-InteropTestsRemote-resources.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
-		C591129ACE9F6CC5EE03FCDE /* 📦 Embed Pods Frameworks */ = {
+		C591129ACE9F6CC5EE03FCDE /* [CP] Embed Pods Frameworks */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Embed Pods Frameworks";
+			name = "[CP] Embed Pods Frameworks";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -726,14 +726,14 @@
 			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-InteropTestsLocalSSL/Pods-InteropTestsLocalSSL-frameworks.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
-		C977426A8727267BBAC7D48E /* 📦 Copy Pods Resources */ = {
+		C977426A8727267BBAC7D48E /* [CP] Copy Pods Resources */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			inputPaths = (
 			);
-			name = "📦 Copy Pods Resources";
+			name = "[CP] Copy Pods Resources";
 			outputPaths = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;

From 34226af8a0250e462d17855bc6f92f4f70b0bec2 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Fri, 24 Jun 2016 16:46:25 -0700
Subject: [PATCH 218/280] Fix sanity

---
 tools/run_tests/run_tests.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 61cef0a9d57..8080dd63492 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -661,7 +661,7 @@ class Sanity(object):
   def test_specs(self):
     import yaml
     with open('tools/run_tests/sanity/sanity_tests.yaml', 'r') as f:
-      return [self.config.job_spec(cmd['script'].split(), None,
+      return [self.config.job_spec(cmd['script'].split(),
                                    timeout_seconds=None, environ={'TEST': 'true'},
                                    cpu_cost=cmd.get('cpu_cost', 1))
               for cmd in yaml.load(f)]

From 5d6d278791b09af50509505f83a91733c6cff049 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Fri, 24 Jun 2016 17:05:45 -0700
Subject: [PATCH 219/280] fix building ruby package

---
 tools/run_tests/build_package_ruby.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/run_tests/build_package_ruby.sh b/tools/run_tests/build_package_ruby.sh
index 4116e29debb..0a755bddb0b 100755
--- a/tools/run_tests/build_package_ruby.sh
+++ b/tools/run_tests/build_package_ruby.sh
@@ -59,6 +59,7 @@ for arch in {x86,x64}; do
     input_dir="$EXTERNAL_GIT_ROOT/architecture=$arch,language=protoc,platform=$plat/artifacts"
     output_dir="$base/src/ruby/tools/bin/${ruby_arch}-${plat}"
     mkdir -p $output_dir/google/protobuf
+    mkdir -p $output_dir/google/protobuf/compiler  # needed for plugin.proto
     cp $input_dir/protoc* $output_dir/
     cp $input_dir/grpc_ruby_plugin* $output_dir/
     for proto in "${well_known_protos[@]}"; do

From 6e789893ea72b24ed664dcf3e14ab979b52de16a Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Fri, 24 Jun 2016 17:06:57 -0700
Subject: [PATCH 220/280] Basic testing of client and sever side compression

---
 src/python/grpcio/tests/tests.json            |   1 +
 .../grpcio/tests/unit/_compression_test.py    | 133 ++++++++++++++++++
 2 files changed, 134 insertions(+)
 create mode 100644 src/python/grpcio/tests/unit/_compression_test.py

diff --git a/src/python/grpcio/tests/tests.json b/src/python/grpcio/tests/tests.json
index e384a2fc135..128f85b8b06 100644
--- a/src/python/grpcio/tests/tests.json
+++ b/src/python/grpcio/tests/tests.json
@@ -10,6 +10,7 @@
   "_channel_connectivity_test.ChannelConnectivityTest",
   "_channel_ready_future_test.ChannelReadyFutureTest",
   "_channel_test.ChannelTest", 
+  "_compression_test.CompressionTest",
   "_connectivity_channel_test.ChannelConnectivityTest", 
   "_connectivity_channel_test.ConnectivityStatesTest",
   "_empty_message_test.EmptyMessageTest",
diff --git a/src/python/grpcio/tests/unit/_compression_test.py b/src/python/grpcio/tests/unit/_compression_test.py
new file mode 100644
index 00000000000..6eddb6f83f3
--- /dev/null
+++ b/src/python/grpcio/tests/unit/_compression_test.py
@@ -0,0 +1,133 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+"""Tests server and client side compression."""
+
+import unittest
+
+import grpc
+from grpc import _grpcio_metadata
+from grpc.framework.foundation import logging_pool
+
+from tests.unit import test_common
+from tests.unit.framework.common import test_constants
+
+_UNARY_UNARY = b'/test/UnaryUnary'
+_STREAM_STREAM = b'/test/StreamStream'
+
+
+def handle_unary(request, servicer_context):
+  servicer_context.send_initial_metadata([
+    ('grpc-internal-encoding-request', 'gzip')])
+  return request
+
+
+def handle_stream(request_iterator, servicer_context):
+  # TODO(issue:#6891) We should be able to remove this loop,
+  # and replace with return; yield
+  servicer_context.send_initial_metadata([
+    ('grpc-internal-encoding-request', 'gzip')])
+  for request in request_iterator:
+    yield request
+
+
+class _MethodHandler(grpc.RpcMethodHandler):
+
+  def __init__(self, request_streaming, response_streaming):
+    self.request_streaming = request_streaming
+    self.response_streaming = response_streaming
+    self.request_deserializer = None
+    self.response_serializer = None
+    self.unary_unary = None
+    self.unary_stream = None
+    self.stream_unary = None
+    self.stream_stream = None
+    if self.request_streaming and self.response_streaming:
+      self.stream_stream = lambda x, y: handle_stream(x, y)
+    elif not self.request_streaming and not self.response_streaming:
+      self.unary_unary = lambda x, y: handle_unary(x, y)
+
+
+class _GenericHandler(grpc.GenericRpcHandler):
+
+  def service(self, handler_call_details):
+    if handler_call_details.method == _UNARY_UNARY:
+      return _MethodHandler(False, False)
+    elif handler_call_details.method == _STREAM_STREAM:
+      return _MethodHandler(True, True)
+    else:
+      return None
+
+
+class CompressionTest(unittest.TestCase):
+
+  def setUp(self):
+    self._server_pool = logging_pool.pool(test_constants.THREAD_CONCURRENCY)
+    self._server = grpc.server((_GenericHandler(),), self._server_pool)
+    self._port = self._server.add_insecure_port('[::]:0')
+    self._server.start()
+
+  def testUnary(self):
+    request = b'\x00' * 100
+
+    # Client -> server compressed through default client channel compression
+    # settings. Server -> client compressed via server-side metadata setting.
+    # TODO(https://github.com/grpc/grpc/issues/4078): replace the "1" integer
+    # literal with proper use of the public API.
+    compressed_channel = grpc.insecure_channel('localhost:%d' % self._port,
+        options=[('grpc.default_compression_algorithm', 1)])
+    multi_callable = compressed_channel.unary_unary(_UNARY_UNARY)
+    response = multi_callable(request)
+    self.assertEqual(request, response)
+
+    # Client -> server compressed through client metadata setting. Server ->
+    # client compressed via server-side metadata setting.
+    # TODO(https://github.com/grpc/grpc/issues/4078): replace the "0" integer
+    # literal with proper use of the public API.
+    uncompressed_channel = grpc.insecure_channel('localhost:%d' % self._port,
+        options=[('grpc.default_compression_algorithm', 0)])
+    multi_callable = compressed_channel.unary_unary(_UNARY_UNARY)
+    response = multi_callable(request, metadata=[
+      ('grpc-internal-encoding-request', 'gzip')])
+    self.assertEqual(request, response)
+
+  def testStreaming(self):
+    request = b'\x00' * 100
+
+    # TODO(https://github.com/grpc/grpc/issues/4078): replace the "1" integer
+    # literal with proper use of the public API.
+    compressed_channel = grpc.insecure_channel('localhost:%d' % self._port,
+        options=[('grpc.default_compression_algorithm', 1)])
+    multi_callable = compressed_channel.stream_stream(_STREAM_STREAM)
+    call = multi_callable([request] * test_constants.STREAM_LENGTH)
+    for response in call:
+      self.assertEqual(request, response)
+
+
+if __name__ == '__main__':
+  unittest.main(verbosity=2)

From 2eb82d7c0a8a1e916512dd77ec994b387b2a08d2 Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Fri, 24 Jun 2016 18:04:12 -0700
Subject: [PATCH 221/280] Add .xcscheme files for ObjC examples

---
 .../xcschemes/AuthSample.xcscheme             | 91 +++++++++++++++++++
 .../xcschemes/HelloWorld.xcscheme             | 91 +++++++++++++++++++
 .../xcschemes/RouteGuideClient.xcscheme       | 91 +++++++++++++++++++
 .../xcshareddata/xcschemes/Sample.xcscheme    | 91 +++++++++++++++++++
 .../xcschemes/SwiftSample.xcscheme            | 91 +++++++++++++++++++
 5 files changed, 455 insertions(+)
 create mode 100644 examples/objective-c/auth_sample/AuthSample.xcodeproj/xcshareddata/xcschemes/AuthSample.xcscheme
 create mode 100644 examples/objective-c/helloworld/HelloWorld.xcodeproj/xcshareddata/xcschemes/HelloWorld.xcscheme
 create mode 100644 examples/objective-c/route_guide/RouteGuideClient.xcodeproj/xcshareddata/xcschemes/RouteGuideClient.xcscheme
 create mode 100644 src/objective-c/examples/Sample/Sample.xcodeproj/xcshareddata/xcschemes/Sample.xcscheme
 create mode 100644 src/objective-c/examples/SwiftSample/SwiftSample.xcodeproj/xcshareddata/xcschemes/SwiftSample.xcscheme

diff --git a/examples/objective-c/auth_sample/AuthSample.xcodeproj/xcshareddata/xcschemes/AuthSample.xcscheme b/examples/objective-c/auth_sample/AuthSample.xcodeproj/xcshareddata/xcschemes/AuthSample.xcscheme
new file mode 100644
index 00000000000..0a210712a53
--- /dev/null
+++ b/examples/objective-c/auth_sample/AuthSample.xcodeproj/xcshareddata/xcschemes/AuthSample.xcscheme
@@ -0,0 +1,91 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "0730"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "63E1E97B1B28CB2000EF0978"
+               BuildableName = "AuthSample.app"
+               BlueprintName = "AuthSample"
+               ReferencedContainer = "container:AuthSample.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "63E1E97B1B28CB2000EF0978"
+            BuildableName = "AuthSample.app"
+            BlueprintName = "AuthSample"
+            ReferencedContainer = "container:AuthSample.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "63E1E97B1B28CB2000EF0978"
+            BuildableName = "AuthSample.app"
+            BlueprintName = "AuthSample"
+            ReferencedContainer = "container:AuthSample.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "63E1E97B1B28CB2000EF0978"
+            BuildableName = "AuthSample.app"
+            BlueprintName = "AuthSample"
+            ReferencedContainer = "container:AuthSample.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>
diff --git a/examples/objective-c/helloworld/HelloWorld.xcodeproj/xcshareddata/xcschemes/HelloWorld.xcscheme b/examples/objective-c/helloworld/HelloWorld.xcodeproj/xcshareddata/xcschemes/HelloWorld.xcscheme
new file mode 100644
index 00000000000..be7b99030c1
--- /dev/null
+++ b/examples/objective-c/helloworld/HelloWorld.xcodeproj/xcshareddata/xcschemes/HelloWorld.xcscheme
@@ -0,0 +1,91 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "0730"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "5E36905F1B2A23800040F884"
+               BuildableName = "HelloWorld.app"
+               BlueprintName = "HelloWorld"
+               ReferencedContainer = "container:HelloWorld.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "5E36905F1B2A23800040F884"
+            BuildableName = "HelloWorld.app"
+            BlueprintName = "HelloWorld"
+            ReferencedContainer = "container:HelloWorld.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "5E36905F1B2A23800040F884"
+            BuildableName = "HelloWorld.app"
+            BlueprintName = "HelloWorld"
+            ReferencedContainer = "container:HelloWorld.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "5E36905F1B2A23800040F884"
+            BuildableName = "HelloWorld.app"
+            BlueprintName = "HelloWorld"
+            ReferencedContainer = "container:HelloWorld.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>
diff --git a/examples/objective-c/route_guide/RouteGuideClient.xcodeproj/xcshareddata/xcschemes/RouteGuideClient.xcscheme b/examples/objective-c/route_guide/RouteGuideClient.xcodeproj/xcshareddata/xcschemes/RouteGuideClient.xcscheme
new file mode 100644
index 00000000000..42806a738ff
--- /dev/null
+++ b/examples/objective-c/route_guide/RouteGuideClient.xcodeproj/xcshareddata/xcschemes/RouteGuideClient.xcscheme
@@ -0,0 +1,91 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "0730"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "6325277C1B1D0395003073D9"
+               BuildableName = "RouteGuideClient.app"
+               BlueprintName = "RouteGuideClient"
+               ReferencedContainer = "container:RouteGuideClient.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "6325277C1B1D0395003073D9"
+            BuildableName = "RouteGuideClient.app"
+            BlueprintName = "RouteGuideClient"
+            ReferencedContainer = "container:RouteGuideClient.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "6325277C1B1D0395003073D9"
+            BuildableName = "RouteGuideClient.app"
+            BlueprintName = "RouteGuideClient"
+            ReferencedContainer = "container:RouteGuideClient.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "6325277C1B1D0395003073D9"
+            BuildableName = "RouteGuideClient.app"
+            BlueprintName = "RouteGuideClient"
+            ReferencedContainer = "container:RouteGuideClient.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>
diff --git a/src/objective-c/examples/Sample/Sample.xcodeproj/xcshareddata/xcschemes/Sample.xcscheme b/src/objective-c/examples/Sample/Sample.xcodeproj/xcshareddata/xcschemes/Sample.xcscheme
new file mode 100644
index 00000000000..d399e22e460
--- /dev/null
+++ b/src/objective-c/examples/Sample/Sample.xcodeproj/xcshareddata/xcschemes/Sample.xcscheme
@@ -0,0 +1,91 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "0730"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "6369A2691A9322E20015FC5C"
+               BuildableName = "Sample.app"
+               BlueprintName = "Sample"
+               ReferencedContainer = "container:Sample.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "6369A2691A9322E20015FC5C"
+            BuildableName = "Sample.app"
+            BlueprintName = "Sample"
+            ReferencedContainer = "container:Sample.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "6369A2691A9322E20015FC5C"
+            BuildableName = "Sample.app"
+            BlueprintName = "Sample"
+            ReferencedContainer = "container:Sample.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "6369A2691A9322E20015FC5C"
+            BuildableName = "Sample.app"
+            BlueprintName = "Sample"
+            ReferencedContainer = "container:Sample.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>
diff --git a/src/objective-c/examples/SwiftSample/SwiftSample.xcodeproj/xcshareddata/xcschemes/SwiftSample.xcscheme b/src/objective-c/examples/SwiftSample/SwiftSample.xcodeproj/xcshareddata/xcschemes/SwiftSample.xcscheme
new file mode 100644
index 00000000000..bba6a02b2b4
--- /dev/null
+++ b/src/objective-c/examples/SwiftSample/SwiftSample.xcodeproj/xcshareddata/xcschemes/SwiftSample.xcscheme
@@ -0,0 +1,91 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "0730"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "633BFFC11B950B210007E424"
+               BuildableName = "SwiftSample.app"
+               BlueprintName = "SwiftSample"
+               ReferencedContainer = "container:SwiftSample.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "633BFFC11B950B210007E424"
+            BuildableName = "SwiftSample.app"
+            BlueprintName = "SwiftSample"
+            ReferencedContainer = "container:SwiftSample.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "633BFFC11B950B210007E424"
+            BuildableName = "SwiftSample.app"
+            BlueprintName = "SwiftSample"
+            ReferencedContainer = "container:SwiftSample.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "633BFFC11B950B210007E424"
+            BuildableName = "SwiftSample.app"
+            BlueprintName = "SwiftSample"
+            ReferencedContainer = "container:SwiftSample.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

From afb62f802220c0fc42f578a59347582a796ea8e6 Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Fri, 24 Jun 2016 19:11:08 -0700
Subject: [PATCH 222/280] Fix InteropTests.m

---
 src/objective-c/tests/InteropTests.m | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/objective-c/tests/InteropTests.m b/src/objective-c/tests/InteropTests.m
index 3102cf597a0..392e7cb8d58 100644
--- a/src/objective-c/tests/InteropTests.m
+++ b/src/objective-c/tests/InteropTests.m
@@ -58,7 +58,7 @@
                  requestedResponseSize:(NSNumber *)responseSize {
   RMTStreamingOutputCallRequest *request = [self message];
   RMTResponseParameters *parameters = [RMTResponseParameters message];
-  parameters.size = (int)responseSize.integerValue;
+  parameters.size = responseSize.intValue;
   [request.responseParametersArray addObject:parameters];
   request.payload.body = [NSMutableData dataWithLength:payloadSize.unsignedIntegerValue];
   return request;
@@ -188,7 +188,7 @@ static cronet_engine *cronetEngine = NULL;
   RMTStreamingOutputCallRequest *request = [RMTStreamingOutputCallRequest message];
   for (NSNumber *size in expectedSizes) {
     RMTResponseParameters *parameters = [RMTResponseParameters message];
-    parameters.size = (int)[size integerValue];
+    parameters.size = [size intValue];
     [request.responseParametersArray addObject:parameters];
   }
 

From a218a0668d32c8994a3147845bfa7647e3db4380 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Sun, 26 Jun 2016 09:58:37 -0700
Subject: [PATCH 223/280] Fix GPR_TIMER misbalancing

---
 src/core/lib/iomgr/ev_epoll_linux.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 4dca551e1e1..5460d727341 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -1114,10 +1114,10 @@ static grpc_error *pollset_kick(grpc_pollset *p,
             append_error(&error, pollset_worker_kick(worker), err_desc);
           }
         }
+        GPR_TIMER_END("pollset_kick.broadcast", 0);
       } else {
         p->kicked_without_pollers = true;
       }
-      GPR_TIMER_END("pollset_kick.broadcast", 0);
     } else {
       GPR_TIMER_MARK("kicked_specifically", 0);
       if (gpr_tls_get(&g_current_thread_worker) != (intptr_t)worker) {

From 2cecece0d352c37300ac55c3477684bb5aa418a1 Mon Sep 17 00:00:00 2001
From: yang-g <yangg@google.com>
Date: Sun, 26 Jun 2016 10:57:11 -0700
Subject: [PATCH 224/280] Add a unit test for compression.

---
 src/ruby/spec/client_server_spec.rb | 46 +++++++++++++++++++++++++++--
 1 file changed, 44 insertions(+), 2 deletions(-)

diff --git a/src/ruby/spec/client_server_spec.rb b/src/ruby/spec/client_server_spec.rb
index aedeca272d3..d60d84996fe 100644
--- a/src/ruby/spec/client_server_spec.rb
+++ b/src/ruby/spec/client_server_spec.rb
@@ -43,11 +43,11 @@ shared_context 'setup: tags' do
     Time.now + 5
   end
 
-  def server_allows_client_to_proceed
+  def server_allows_client_to_proceed(metadata = {})
     recvd_rpc = @server.request_call(@server_queue, @server_tag, deadline)
     expect(recvd_rpc).to_not eq nil
     server_call = recvd_rpc.call
-    ops = { CallOps::SEND_INITIAL_METADATA => {} }
+    ops = { CallOps::SEND_INITIAL_METADATA => metadata }
     svr_batch = server_call.run_batch(@server_queue, @server_tag, deadline, ops)
     expect(svr_batch.send_metadata).to be true
     server_call
@@ -135,6 +135,48 @@ shared_examples 'basic GRPC message delivery is OK' do
     expect(svr_batch.send_message).to be true
   end
 
+  it 'compressed messages can be sent and received' do
+    call = new_client_call
+    server_call = nil
+    long_request_str = '0' * 2000
+    long_response_str = '1' * 2000
+    md = { 'grpc-internal-encoding-request' => 'gzip' }
+
+    server_thread = Thread.new do
+      server_call = server_allows_client_to_proceed(md)
+    end
+
+    client_ops = {
+      CallOps::SEND_INITIAL_METADATA => md,
+      CallOps::SEND_MESSAGE => long_request_str
+    }
+    batch_result = call.run_batch(@client_queue, @client_tag, deadline,
+                                  client_ops)
+    expect(batch_result.send_metadata).to be true
+    expect(batch_result.send_message).to be true
+
+    # confirm the server can read the inbound message
+    server_thread.join
+    server_ops = {
+      CallOps::RECV_MESSAGE => nil,
+      CallOps::SEND_MESSAGE => long_response_str
+    }
+    svr_batch = server_call.run_batch(@server_queue, @server_tag, deadline,
+                                      server_ops)
+    expect(svr_batch.message).to eq(long_request_str)
+    expect(svr_batch.send_message).to be true
+
+    client_ops = {
+      CallOps::SEND_CLOSE_FROM_CLIENT => nil,
+      CallOps::RECV_INITIAL_METADATA => nil,
+      CallOps::RECV_MESSAGE => nil
+    }
+    batch_result = call.run_batch(@client_queue, @client_tag, deadline,
+                                  client_ops)
+    expect(batch_result.send_close).to be true
+    expect(batch_result.message).to eq long_response_str
+  end
+
   it 'servers can ignore a client write and send a status' do
     call = new_client_call
     server_call = nil

From aa4bb51d9539b6aef4758fd9e7aef0b3f4d8f71c Mon Sep 17 00:00:00 2001
From: Ken Payson <kpayson@google.com>
Date: Wed, 22 Jun 2016 09:49:41 -0700
Subject: [PATCH 225/280] Updated several threads to use CleanupThread for
 clean exit

---
 src/python/grpcio/grpc/_channel.py            |  65 +++--
 .../grpcio/grpc/beta/_server_adaptations.py   |  38 +--
 src/python/grpcio/tests/tests.json            |   1 +
 .../grpcio/tests/unit/_exit_scenarios.py      | 249 ++++++++++++++++++
 src/python/grpcio/tests/unit/_exit_test.py    | 185 +++++++++++++
 5 files changed, 501 insertions(+), 37 deletions(-)
 create mode 100644 src/python/grpcio/tests/unit/_exit_scenarios.py
 create mode 100644 src/python/grpcio/tests/unit/_exit_test.py

diff --git a/src/python/grpcio/grpc/_channel.py b/src/python/grpcio/grpc/_channel.py
index 1f34beeb2cd..cf6175d0314 100644
--- a/src/python/grpcio/grpc/_channel.py
+++ b/src/python/grpcio/grpc/_channel.py
@@ -179,6 +179,7 @@ def _event_handler(state, call, response_deserializer):
 def _consume_request_iterator(
     request_iterator, state, call, request_serializer):
   event_handler = _event_handler(state, call, None)
+
   def consume_request_iterator():
     for request in request_iterator:
       serialized_request = _common.serialize(request, request_serializer)
@@ -212,8 +213,18 @@ def _consume_request_iterator(
         )
         call.start_batch(cygrpc.Operations(operations), event_handler)
         state.due.add(cygrpc.OperationType.send_close_from_client)
-  thread = threading.Thread(target=consume_request_iterator)
-  thread.start()
+
+  def stop_consumption_thread(timeout):
+    with state.condition:
+      if state.code is None:
+        call.cancel()
+        state.cancelled = True
+        _abort(state, grpc.StatusCode.CANCELLED, 'Cancelled!')
+        state.condition.notify_all()
+
+  consumption_thread = _common.CleanupThread(
+      stop_consumption_thread, target=consume_request_iterator)
+  consumption_thread.start()
 
 
 class _Rendezvous(grpc.RpcError, grpc.Future, grpc.Call):
@@ -652,16 +663,27 @@ class _ChannelCallState(object):
     self.managed_calls = None
 
 
-def _call_spin(state):
-  while True:
-    event = state.completion_queue.poll()
-    completed_call = event.tag(event)
-    if completed_call is not None:
-      with state.lock:
-        state.managed_calls.remove(completed_call)
-        if not state.managed_calls:
-          state.managed_calls = None
-          return
+def _run_channel_spin_thread(state):
+  def channel_spin():
+    while True:
+      event = state.completion_queue.poll()
+      completed_call = event.tag(event)
+      if completed_call is not None:
+        with state.lock:
+          state.managed_calls.remove(completed_call)
+          if not state.managed_calls:
+            state.managed_calls = None
+            return
+
+  def stop_channel_spin(timeout):
+    with state.lock:
+      if state.managed_calls is not None:
+        for call in state.managed_calls:
+          call.cancel()
+
+  channel_spin_thread = _common.CleanupThread(
+      stop_channel_spin, target=channel_spin)
+  channel_spin_thread.start()
 
 
 def _create_channel_managed_call(state):
@@ -690,8 +712,7 @@ def _create_channel_managed_call(state):
           parent, flags, state.completion_queue, method, host, deadline)
       if state.managed_calls is None:
         state.managed_calls = set((call,))
-        spin_thread = threading.Thread(target=_call_spin, args=(state,))
-        spin_thread.start()
+        _run_channel_spin_thread(state)
       else:
         state.managed_calls.add(call)
       return call
@@ -784,11 +805,18 @@ def _poll_connectivity(state, channel, initial_try_to_connect):
             _spawn_delivery(state, callbacks)
 
 
+def _moot(state):
+  with state.lock:
+    del state.callbacks_and_connectivities[:]
+
+
 def _subscribe(state, callback, try_to_connect):
   with state.lock:
     if not state.callbacks_and_connectivities and not state.polling:
-      polling_thread = threading.Thread(
-          target=_poll_connectivity,
+      def cancel_all_subscriptions(timeout):
+        _moot(state)
+      polling_thread = _common.CleanupThread(
+          cancel_all_subscriptions, target=_poll_connectivity,
           args=(state, state.channel, bool(try_to_connect)))
       polling_thread.start()
       state.polling = True
@@ -812,11 +840,6 @@ def _unsubscribe(state, callback):
         break
 
 
-def _moot(state):
-  with state.lock:
-    del state.callbacks_and_connectivities[:]
-
-
 def _options(options):
   if options is None:
     pairs = ((cygrpc.ChannelArgKey.primary_user_agent_string, _USER_AGENT),)
diff --git a/src/python/grpcio/grpc/beta/_server_adaptations.py b/src/python/grpcio/grpc/beta/_server_adaptations.py
index 79e6ca87eb5..c695434dacf 100644
--- a/src/python/grpcio/grpc/beta/_server_adaptations.py
+++ b/src/python/grpcio/grpc/beta/_server_adaptations.py
@@ -161,14 +161,24 @@ class _Callback(stream.Consumer):
           self._condition.wait()
 
 
-def _pipe_requests(request_iterator, request_consumer, servicer_context):
-  for request in request_iterator:
-    if not servicer_context.is_active():
-      return
-    request_consumer.consume(request)
-    if not servicer_context.is_active():
-      return
-  request_consumer.terminate()
+def _run_request_pipe_thread(request_iterator, request_consumer,
+                             servicer_context):
+  thread_joined = threading.Event()
+  def pipe_requests():
+    for request in request_iterator:
+      if not servicer_context.is_active() or thread_joined.is_set():
+        return
+      request_consumer.consume(request)
+      if not servicer_context.is_active() or thread_joined.is_set():
+        return
+    request_consumer.terminate()
+
+  def stop_request_pipe(timeout):
+    thread_joined.set()
+
+  request_pipe_thread = _common.CleanupThread(
+      stop_request_pipe, target=pipe_requests)
+  request_pipe_thread.start()
 
 
 def _adapt_unary_unary_event(unary_unary_event):
@@ -206,10 +216,8 @@ def _adapt_stream_unary_event(stream_unary_event):
       raise abandonment.Abandoned()
     request_consumer = stream_unary_event(
         callback.consume_and_terminate, _FaceServicerContext(servicer_context))
-    request_pipe_thread = threading.Thread(
-        target=_pipe_requests,
-        args=(request_iterator, request_consumer, servicer_context,))
-    request_pipe_thread.start()
+    _run_request_pipe_thread(
+        request_iterator, request_consumer, servicer_context)
     return callback.draw_all_values()[0]
   return adaptation
 
@@ -221,10 +229,8 @@ def _adapt_stream_stream_event(stream_stream_event):
       raise abandonment.Abandoned()
     request_consumer = stream_stream_event(
         callback, _FaceServicerContext(servicer_context))
-    request_pipe_thread = threading.Thread(
-        target=_pipe_requests,
-        args=(request_iterator, request_consumer, servicer_context,))
-    request_pipe_thread.start()
+    _run_request_pipe_thread(
+        request_iterator, request_consumer, servicer_context)
     while True:
       response = callback.draw_one_value()
       if response is None:
diff --git a/src/python/grpcio/tests/tests.json b/src/python/grpcio/tests/tests.json
index 8e509621a84..310efe1013b 100644
--- a/src/python/grpcio/tests/tests.json
+++ b/src/python/grpcio/tests/tests.json
@@ -13,6 +13,7 @@
   "_connectivity_channel_test.ChannelConnectivityTest", 
   "_connectivity_channel_test.ConnectivityStatesTest",
   "_empty_message_test.EmptyMessageTest",
+  "_exit_test.ExitTest",
   "_face_interface_test.DynamicInvokerBlockingInvocationInlineServiceTest", 
   "_face_interface_test.DynamicInvokerFutureInvocationAsynchronousEventServiceTest", 
   "_face_interface_test.GenericInvokerBlockingInvocationInlineServiceTest", 
diff --git a/src/python/grpcio/tests/unit/_exit_scenarios.py b/src/python/grpcio/tests/unit/_exit_scenarios.py
new file mode 100644
index 00000000000..24a2faef852
--- /dev/null
+++ b/src/python/grpcio/tests/unit/_exit_scenarios.py
@@ -0,0 +1,249 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Defines a number of module-scope gRPC scenarios to test clean exit."""
+
+import argparse
+import threading
+import time
+
+import grpc
+
+from tests.unit.framework.common import test_constants
+
+WAIT_TIME = 1000
+
+REQUEST = b'request'
+
+UNSTARTED_SERVER = 'unstarted_server'
+RUNNING_SERVER = 'running_server'
+POLL_CONNECTIVITY_NO_SERVER = 'poll_connectivity_no_server'
+POLL_CONNECTIVITY = 'poll_connectivity'
+IN_FLIGHT_UNARY_UNARY_CALL = 'in_flight_unary_unary_call'
+IN_FLIGHT_UNARY_STREAM_CALL = 'in_flight_unary_stream_call'
+IN_FLIGHT_STREAM_UNARY_CALL = 'in_flight_stream_unary_call'
+IN_FLIGHT_STREAM_STREAM_CALL = 'in_flight_stream_stream_call'
+IN_FLIGHT_PARTIAL_UNARY_STREAM_CALL = 'in_flight_partial_unary_stream_call'
+IN_FLIGHT_PARTIAL_STREAM_UNARY_CALL = 'in_flight_partial_stream_unary_call'
+IN_FLIGHT_PARTIAL_STREAM_STREAM_CALL = 'in_flight_partial_stream_stream_call'
+
+UNARY_UNARY = b'/test/UnaryUnary'
+UNARY_STREAM = b'/test/UnaryStream'
+STREAM_UNARY = b'/test/StreamUnary'
+STREAM_STREAM = b'/test/StreamStream'
+PARTIAL_UNARY_STREAM = b'/test/PartialUnaryStream'
+PARTIAL_STREAM_UNARY = b'/test/PartialStreamUnary'
+PARTIAL_STREAM_STREAM = b'/test/PartialStreamStream'
+
+TEST_TO_METHOD = {
+    IN_FLIGHT_UNARY_UNARY_CALL: UNARY_UNARY,
+    IN_FLIGHT_UNARY_STREAM_CALL: UNARY_STREAM,
+    IN_FLIGHT_STREAM_UNARY_CALL: STREAM_UNARY,
+    IN_FLIGHT_STREAM_STREAM_CALL: STREAM_STREAM,
+    IN_FLIGHT_PARTIAL_UNARY_STREAM_CALL: PARTIAL_UNARY_STREAM,
+    IN_FLIGHT_PARTIAL_STREAM_UNARY_CALL: PARTIAL_STREAM_UNARY,
+    IN_FLIGHT_PARTIAL_STREAM_STREAM_CALL: PARTIAL_STREAM_STREAM,
+}
+
+
+def hang_unary_unary(request, servicer_context):
+  time.sleep(WAIT_TIME)
+
+
+def hang_unary_stream(request, servicer_context):
+  time.sleep(WAIT_TIME)
+
+
+def hang_partial_unary_stream(request, servicer_context):
+  for _ in range(test_constants.STREAM_LENGTH // 2):
+    yield request
+  time.sleep(WAIT_TIME)
+
+
+def hang_stream_unary(request_iterator, servicer_context):
+  time.sleep(WAIT_TIME)
+
+
+def hang_partial_stream_unary(request_iterator, servicer_context):
+  for _ in range(test_constants.STREAM_LENGTH // 2):
+    next(request_iterator)
+  time.sleep(WAIT_TIME)
+
+
+def hang_stream_stream(request_iterator, servicer_context):
+  time.sleep(WAIT_TIME)
+
+
+def hang_partial_stream_stream(request_iterator, servicer_context):
+  for _ in range(test_constants.STREAM_LENGTH // 2):
+    yield next(request_iterator)
+  time.sleep(WAIT_TIME)
+
+
+class MethodHandler(grpc.RpcMethodHandler):
+
+  def __init__(self, request_streaming, response_streaming, partial_hang):
+    self.request_streaming = request_streaming
+    self.response_streaming = response_streaming
+    self.request_deserializer = None
+    self.response_serializer = None
+    self.unary_unary = None
+    self.unary_stream = None
+    self.stream_unary = None
+    self.stream_stream = None
+    if self.request_streaming and self.response_streaming:
+      if partial_hang:
+        self.stream_stream = hang_partial_stream_stream
+      else:
+        self.stream_stream = hang_stream_stream
+    elif self.request_streaming:
+      if partial_hang:
+        self.stream_unary = hang_partial_stream_unary
+      else:
+        self.stream_unary = hang_stream_unary
+    elif self.response_streaming:
+      if partial_hang:
+        self.unary_stream = hang_partial_unary_stream
+      else:
+        self.unary_stream = hang_unary_stream
+    else:
+      self.unary_unary = hang_unary_unary
+
+
+class GenericHandler(grpc.GenericRpcHandler):
+
+  def service(self, handler_call_details):
+    if handler_call_details.method == UNARY_UNARY:
+      return MethodHandler(False, False, False)
+    elif handler_call_details.method == UNARY_STREAM:
+      return MethodHandler(False, True, False)
+    elif handler_call_details.method == STREAM_UNARY:
+      return MethodHandler(True, False, False)
+    elif handler_call_details.method == STREAM_STREAM:
+      return MethodHandler(True, True, False)
+    elif handler_call_details.method == PARTIAL_UNARY_STREAM:
+      return MethodHandler(False, True, True)
+    elif handler_call_details.method == PARTIAL_STREAM_UNARY:
+      return MethodHandler(True, False, True)
+    elif handler_call_details.method == PARTIAL_STREAM_STREAM:
+      return MethodHandler(True, True, True)
+    else:
+      return None
+
+
+# Traditional executors will not exit until all their
+# current jobs complete.  Because we submit jobs that will
+# never finish, we don't want to block exit on these jobs.
+class DaemonPool(object):
+
+  def submit(self, fn, *args, **kwargs):
+    thread = threading.Thread(target=fn, args=args, kwargs=kwargs)
+    thread.daemon = True
+    thread.start()
+
+  def shutdown(self, wait=True):
+    pass
+
+
+def infinite_request_iterator():
+  while True:
+    yield REQUEST
+
+
+if __name__ == '__main__':
+  parser = argparse.ArgumentParser()
+  parser.add_argument('scenario', type=str)
+  parser.add_argument(
+      '--wait_for_interrupt', dest='wait_for_interrupt', action='store_true')
+  args = parser.parse_args()
+
+  if args.scenario == UNSTARTED_SERVER:
+    server = grpc.server((), DaemonPool())
+    if args.wait_for_interrupt:
+      time.sleep(WAIT_TIME)
+  elif args.scenario == RUNNING_SERVER:
+    server = grpc.server((), DaemonPool())
+    port = server.add_insecure_port('[::]:0')
+    server.start()
+    if args.wait_for_interrupt:
+      time.sleep(WAIT_TIME)
+  elif args.scenario == POLL_CONNECTIVITY_NO_SERVER:
+    channel = grpc.insecure_channel('localhost:12345')
+
+    def connectivity_callback(connectivity):
+      pass
+
+    channel.subscribe(connectivity_callback, try_to_connect=True)
+    if args.wait_for_interrupt:
+      time.sleep(WAIT_TIME)
+  elif args.scenario == POLL_CONNECTIVITY:
+    server = grpc.server((), DaemonPool())
+    port = server.add_insecure_port('[::]:0')
+    server.start()
+    channel = grpc.insecure_channel('localhost:%d' % port)
+
+    def connectivity_callback(connectivity):
+      pass
+
+    channel.subscribe(connectivity_callback, try_to_connect=True)
+    if args.wait_for_interrupt:
+      time.sleep(WAIT_TIME)
+
+  else:
+    handler = GenericHandler()
+    server = grpc.server((), DaemonPool())
+    port = server.add_insecure_port('[::]:0')
+    server.add_generic_rpc_handlers((handler,))
+    server.start()
+    channel = grpc.insecure_channel('localhost:%d' % port)
+
+    method = TEST_TO_METHOD[args.scenario]
+
+    if args.scenario == IN_FLIGHT_UNARY_UNARY_CALL:
+      multi_callable = channel.unary_unary(method)
+      future = multi_callable.future(REQUEST)
+      result, call = multi_callable.with_call(REQUEST)
+    elif (args.scenario == IN_FLIGHT_UNARY_STREAM_CALL or
+          args.scenario == IN_FLIGHT_PARTIAL_UNARY_STREAM_CALL):
+      multi_callable = channel.unary_stream(method)
+      response_iterator = multi_callable(REQUEST)
+      for response in response_iterator:
+        pass
+    elif (args.scenario == IN_FLIGHT_STREAM_UNARY_CALL or
+          args.scenario == IN_FLIGHT_PARTIAL_STREAM_UNARY_CALL):
+      multi_callable = channel.stream_unary(method)
+      future = multi_callable.future(infinite_request_iterator())
+      result, call = multi_callable.with_call(
+          [REQUEST] * test_constants.STREAM_LENGTH)
+    elif (args.scenario == IN_FLIGHT_STREAM_STREAM_CALL or
+          args.scenario == IN_FLIGHT_PARTIAL_STREAM_STREAM_CALL):
+      multi_callable = channel.stream_stream(method)
+      response_iterator = multi_callable(infinite_request_iterator())
+      for response in response_iterator:
+        pass
diff --git a/src/python/grpcio/tests/unit/_exit_test.py b/src/python/grpcio/tests/unit/_exit_test.py
new file mode 100644
index 00000000000..b0d6af73e58
--- /dev/null
+++ b/src/python/grpcio/tests/unit/_exit_test.py
@@ -0,0 +1,185 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Tests clean exit of server/client on Python Interpreter exit/sigint.
+
+The tests in this module spawn a subprocess for each test case, the
+test is considered successful if it doesn't hang/timeout.
+"""
+
+import atexit
+import os
+import signal
+import six
+import subprocess
+import sys
+import threading
+import time
+import unittest
+
+from tests.unit import _exit_scenarios
+
+SCENARIO_FILE = os.path.abspath(os.path.join(
+    os.path.dirname(os.path.realpath(__file__)), '_exit_scenarios.py'))
+INTERPRETER = sys.executable
+BASE_COMMAND = [INTERPRETER, SCENARIO_FILE]
+BASE_SIGTERM_COMMAND = BASE_COMMAND + ['--wait_for_interrupt']
+
+INIT_TIME = 1.0
+
+
+processes = []
+process_lock = threading.Lock()
+
+
+# Make sure we attempt to clean up any
+# processes we may have left running
+def cleanup_processes():
+  with process_lock:
+    for process in processes:
+      try:
+        process.kill()
+      except Exception:
+        pass
+atexit.register(cleanup_processes)
+
+
+def interrupt_and_wait(process):
+  with process_lock:
+    processes.append(process)
+  time.sleep(INIT_TIME)
+  os.kill(process.pid, signal.SIGINT)
+  process.wait()
+
+
+def wait(process):
+  with process_lock:
+    processes.append(process)
+  process.wait()
+
+
+class ExitTest(unittest.TestCase):
+
+  def test_unstarted_server(self):
+    process = subprocess.Popen(
+        BASE_COMMAND + [_exit_scenarios.UNSTARTED_SERVER],
+        stdout=sys.stdout, stderr=sys.stderr)
+    wait(process)
+
+  def test_unstarted_server_terminate(self):
+    process = subprocess.Popen(
+        BASE_SIGTERM_COMMAND + [_exit_scenarios.UNSTARTED_SERVER],
+        stdout=sys.stdout)
+    interrupt_and_wait(process)
+
+  def test_running_server(self):
+    process = subprocess.Popen(
+        BASE_COMMAND + [_exit_scenarios.RUNNING_SERVER],
+        stdout=sys.stdout, stderr=sys.stderr)
+    wait(process)
+
+  def test_running_server_terminate(self):
+    process = subprocess.Popen(
+        BASE_SIGTERM_COMMAND + [_exit_scenarios.RUNNING_SERVER],
+        stdout=sys.stdout, stderr=sys.stderr)
+    interrupt_and_wait(process)
+
+  def test_poll_connectivity_no_server(self):
+    process = subprocess.Popen(
+        BASE_COMMAND + [_exit_scenarios.POLL_CONNECTIVITY_NO_SERVER],
+        stdout=sys.stdout, stderr=sys.stderr)
+    wait(process)
+
+  def test_poll_connectivity_no_server_terminate(self):
+    process = subprocess.Popen(
+        BASE_SIGTERM_COMMAND + [_exit_scenarios.POLL_CONNECTIVITY_NO_SERVER],
+        stdout=sys.stdout, stderr=sys.stderr)
+    interrupt_and_wait(process)
+
+  def test_poll_connectivity(self):
+    process = subprocess.Popen(
+        BASE_COMMAND + [_exit_scenarios.POLL_CONNECTIVITY],
+        stdout=sys.stdout, stderr=sys.stderr)
+    wait(process)
+
+  def test_poll_connectivity_terminate(self):
+    process = subprocess.Popen(
+        BASE_SIGTERM_COMMAND + [_exit_scenarios.POLL_CONNECTIVITY],
+        stdout=sys.stdout, stderr=sys.stderr)
+    interrupt_and_wait(process)
+
+  def test_in_flight_unary_unary_call(self):
+    process = subprocess.Popen(
+        BASE_COMMAND + [_exit_scenarios.IN_FLIGHT_UNARY_UNARY_CALL],
+        stdout=sys.stdout, stderr=sys.stderr)
+    interrupt_and_wait(process)
+
+  @unittest.skipIf(six.PY2, 'https://github.com/grpc/grpc/issues/6999')
+  def test_in_flight_unary_stream_call(self):
+    process = subprocess.Popen(
+        BASE_COMMAND + [_exit_scenarios.IN_FLIGHT_UNARY_STREAM_CALL],
+        stdout=sys.stdout, stderr=sys.stderr)
+    interrupt_and_wait(process)
+
+  def test_in_flight_stream_unary_call(self):
+    process = subprocess.Popen(
+        BASE_COMMAND + [_exit_scenarios.IN_FLIGHT_STREAM_UNARY_CALL],
+        stdout=sys.stdout, stderr=sys.stderr)
+    interrupt_and_wait(process)
+
+  @unittest.skipIf(six.PY2, 'https://github.com/grpc/grpc/issues/6999')
+  def test_in_flight_stream_stream_call(self):
+    process = subprocess.Popen(
+        BASE_COMMAND + [_exit_scenarios.IN_FLIGHT_STREAM_STREAM_CALL],
+        stdout=sys.stdout, stderr=sys.stderr)
+    interrupt_and_wait(process)
+
+  @unittest.skipIf(six.PY2, 'https://github.com/grpc/grpc/issues/6999')
+  def test_in_flight_partial_unary_stream_call(self):
+    process = subprocess.Popen(
+        BASE_COMMAND + [_exit_scenarios.IN_FLIGHT_PARTIAL_UNARY_STREAM_CALL],
+        stdout=sys.stdout, stderr=sys.stderr)
+    interrupt_and_wait(process)
+
+  def test_in_flight_partial_stream_unary_call(self):
+    process = subprocess.Popen(
+        BASE_COMMAND + [_exit_scenarios.IN_FLIGHT_PARTIAL_STREAM_UNARY_CALL],
+        stdout=sys.stdout, stderr=sys.stderr)
+    interrupt_and_wait(process)
+
+  @unittest.skipIf(six.PY2, 'https://github.com/grpc/grpc/issues/6999')
+  def test_in_flight_partial_stream_stream_call(self):
+    process = subprocess.Popen(
+        BASE_COMMAND + [_exit_scenarios.IN_FLIGHT_PARTIAL_STREAM_STREAM_CALL],
+        stdout=sys.stdout, stderr=sys.stderr)
+    interrupt_and_wait(process)
+
+
+if __name__ == '__main__':
+  unittest.main(verbosity=2)

From 8d4ea7969c2de127c5739fca2db544b9ab30765f Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Mon, 27 Jun 2016 07:23:26 -0700
Subject: [PATCH 226/280] \o/ Python

---
 tools/run_tests/run_tests.py | 2 --
 1 file changed, 2 deletions(-)

diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 8080dd63492..89934f8c762 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -390,7 +390,6 @@ class PythonLanguage(object):
     if self.config.build_config != 'gcov':
       return [self.config.job_spec(
           ['tools/run_tests/run_python.sh', tox_env],
-          None,
           environ=dict(environment.items() +
                        [('GRPC_PYTHON_TESTRUNNER_FILTER', suite_name)]),
           shortname='%s.test.%s' % (tox_env, suite_name),
@@ -399,7 +398,6 @@ class PythonLanguage(object):
           for tox_env in self._tox_envs]
     else:
       return [self.config.job_spec(['tools/run_tests/run_python.sh', tox_env],
-                                   None,
                                    environ=environment,
                                    shortname='%s.test.coverage' % tox_env,
                                    timeout_seconds=15*60)

From b8431ae707b28f9f1c27e1f0fad8bbbd6f12f48f Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Fri, 24 Jun 2016 18:04:12 -0700
Subject: [PATCH 227/280] Add .xcscheme files for ObjC examples

---
 .../xcschemes/AuthSample.xcscheme             | 91 +++++++++++++++++++
 .../xcschemes/HelloWorld.xcscheme             | 91 +++++++++++++++++++
 .../xcschemes/RouteGuideClient.xcscheme       | 91 +++++++++++++++++++
 .../xcshareddata/xcschemes/Sample.xcscheme    | 91 +++++++++++++++++++
 .../xcschemes/SwiftSample.xcscheme            | 91 +++++++++++++++++++
 5 files changed, 455 insertions(+)
 create mode 100644 examples/objective-c/auth_sample/AuthSample.xcodeproj/xcshareddata/xcschemes/AuthSample.xcscheme
 create mode 100644 examples/objective-c/helloworld/HelloWorld.xcodeproj/xcshareddata/xcschemes/HelloWorld.xcscheme
 create mode 100644 examples/objective-c/route_guide/RouteGuideClient.xcodeproj/xcshareddata/xcschemes/RouteGuideClient.xcscheme
 create mode 100644 src/objective-c/examples/Sample/Sample.xcodeproj/xcshareddata/xcschemes/Sample.xcscheme
 create mode 100644 src/objective-c/examples/SwiftSample/SwiftSample.xcodeproj/xcshareddata/xcschemes/SwiftSample.xcscheme

diff --git a/examples/objective-c/auth_sample/AuthSample.xcodeproj/xcshareddata/xcschemes/AuthSample.xcscheme b/examples/objective-c/auth_sample/AuthSample.xcodeproj/xcshareddata/xcschemes/AuthSample.xcscheme
new file mode 100644
index 00000000000..0a210712a53
--- /dev/null
+++ b/examples/objective-c/auth_sample/AuthSample.xcodeproj/xcshareddata/xcschemes/AuthSample.xcscheme
@@ -0,0 +1,91 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "0730"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "63E1E97B1B28CB2000EF0978"
+               BuildableName = "AuthSample.app"
+               BlueprintName = "AuthSample"
+               ReferencedContainer = "container:AuthSample.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "63E1E97B1B28CB2000EF0978"
+            BuildableName = "AuthSample.app"
+            BlueprintName = "AuthSample"
+            ReferencedContainer = "container:AuthSample.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "63E1E97B1B28CB2000EF0978"
+            BuildableName = "AuthSample.app"
+            BlueprintName = "AuthSample"
+            ReferencedContainer = "container:AuthSample.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "63E1E97B1B28CB2000EF0978"
+            BuildableName = "AuthSample.app"
+            BlueprintName = "AuthSample"
+            ReferencedContainer = "container:AuthSample.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>
diff --git a/examples/objective-c/helloworld/HelloWorld.xcodeproj/xcshareddata/xcschemes/HelloWorld.xcscheme b/examples/objective-c/helloworld/HelloWorld.xcodeproj/xcshareddata/xcschemes/HelloWorld.xcscheme
new file mode 100644
index 00000000000..be7b99030c1
--- /dev/null
+++ b/examples/objective-c/helloworld/HelloWorld.xcodeproj/xcshareddata/xcschemes/HelloWorld.xcscheme
@@ -0,0 +1,91 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "0730"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "5E36905F1B2A23800040F884"
+               BuildableName = "HelloWorld.app"
+               BlueprintName = "HelloWorld"
+               ReferencedContainer = "container:HelloWorld.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "5E36905F1B2A23800040F884"
+            BuildableName = "HelloWorld.app"
+            BlueprintName = "HelloWorld"
+            ReferencedContainer = "container:HelloWorld.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "5E36905F1B2A23800040F884"
+            BuildableName = "HelloWorld.app"
+            BlueprintName = "HelloWorld"
+            ReferencedContainer = "container:HelloWorld.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "5E36905F1B2A23800040F884"
+            BuildableName = "HelloWorld.app"
+            BlueprintName = "HelloWorld"
+            ReferencedContainer = "container:HelloWorld.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>
diff --git a/examples/objective-c/route_guide/RouteGuideClient.xcodeproj/xcshareddata/xcschemes/RouteGuideClient.xcscheme b/examples/objective-c/route_guide/RouteGuideClient.xcodeproj/xcshareddata/xcschemes/RouteGuideClient.xcscheme
new file mode 100644
index 00000000000..42806a738ff
--- /dev/null
+++ b/examples/objective-c/route_guide/RouteGuideClient.xcodeproj/xcshareddata/xcschemes/RouteGuideClient.xcscheme
@@ -0,0 +1,91 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "0730"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "6325277C1B1D0395003073D9"
+               BuildableName = "RouteGuideClient.app"
+               BlueprintName = "RouteGuideClient"
+               ReferencedContainer = "container:RouteGuideClient.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "6325277C1B1D0395003073D9"
+            BuildableName = "RouteGuideClient.app"
+            BlueprintName = "RouteGuideClient"
+            ReferencedContainer = "container:RouteGuideClient.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "6325277C1B1D0395003073D9"
+            BuildableName = "RouteGuideClient.app"
+            BlueprintName = "RouteGuideClient"
+            ReferencedContainer = "container:RouteGuideClient.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "6325277C1B1D0395003073D9"
+            BuildableName = "RouteGuideClient.app"
+            BlueprintName = "RouteGuideClient"
+            ReferencedContainer = "container:RouteGuideClient.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>
diff --git a/src/objective-c/examples/Sample/Sample.xcodeproj/xcshareddata/xcschemes/Sample.xcscheme b/src/objective-c/examples/Sample/Sample.xcodeproj/xcshareddata/xcschemes/Sample.xcscheme
new file mode 100644
index 00000000000..d399e22e460
--- /dev/null
+++ b/src/objective-c/examples/Sample/Sample.xcodeproj/xcshareddata/xcschemes/Sample.xcscheme
@@ -0,0 +1,91 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "0730"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "6369A2691A9322E20015FC5C"
+               BuildableName = "Sample.app"
+               BlueprintName = "Sample"
+               ReferencedContainer = "container:Sample.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "6369A2691A9322E20015FC5C"
+            BuildableName = "Sample.app"
+            BlueprintName = "Sample"
+            ReferencedContainer = "container:Sample.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "6369A2691A9322E20015FC5C"
+            BuildableName = "Sample.app"
+            BlueprintName = "Sample"
+            ReferencedContainer = "container:Sample.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "6369A2691A9322E20015FC5C"
+            BuildableName = "Sample.app"
+            BlueprintName = "Sample"
+            ReferencedContainer = "container:Sample.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>
diff --git a/src/objective-c/examples/SwiftSample/SwiftSample.xcodeproj/xcshareddata/xcschemes/SwiftSample.xcscheme b/src/objective-c/examples/SwiftSample/SwiftSample.xcodeproj/xcshareddata/xcschemes/SwiftSample.xcscheme
new file mode 100644
index 00000000000..bba6a02b2b4
--- /dev/null
+++ b/src/objective-c/examples/SwiftSample/SwiftSample.xcodeproj/xcshareddata/xcschemes/SwiftSample.xcscheme
@@ -0,0 +1,91 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "0730"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "633BFFC11B950B210007E424"
+               BuildableName = "SwiftSample.app"
+               BlueprintName = "SwiftSample"
+               ReferencedContainer = "container:SwiftSample.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "633BFFC11B950B210007E424"
+            BuildableName = "SwiftSample.app"
+            BlueprintName = "SwiftSample"
+            ReferencedContainer = "container:SwiftSample.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "633BFFC11B950B210007E424"
+            BuildableName = "SwiftSample.app"
+            BlueprintName = "SwiftSample"
+            ReferencedContainer = "container:SwiftSample.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "633BFFC11B950B210007E424"
+            BuildableName = "SwiftSample.app"
+            BlueprintName = "SwiftSample"
+            ReferencedContainer = "container:SwiftSample.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

From d4824d3a7eed24f572f94fea415364fe96aa1768 Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Mon, 27 Jun 2016 10:31:53 -0700
Subject: [PATCH 228/280] Build ObjC examples in travis

---
 .travis.yml | 53 +++++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 41 insertions(+), 12 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 16c6390a54a..afc6a753de6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,31 @@ env:
     - CONFIG=opt
     - TEST=objc
     - JOBS=1
+  matrix:
+    - TEST_PATH="src/objective-c/tests" WORKSPACE="Tests.xcworkspace"
+      SCHEME="RxLibraryUnitTests" BUILD_ONLY="false" INTEROP_SERVER="false"
+    - TEST_PATH="src/objective-c/tests" WORKSPACE="Tests.xcworkspace"
+      SCHEME="InteropTestsLocalSSL" BUILD_ONLY="false" INTEROP_SERVER="true"
+    - TEST_PATH="src/objective-c/tests" WORKSPACE="Tests.xcworkspace"
+      SCHEME="InteropTestsLocalCleartext" BUILD_ONLY="false"
+      INTEROP_SERVER="true"
+    # TODO(jcanizales): Investigate why they time out:
+    # - TEST_PATH="src/objective-c/tests" WORKSPACE="Tests.xcworkspace"
+    #   SCHEME="InteropTestsRemote" BUILD_ONLY=false INTEROP_SERVER=true
+    - TEST_PATH="examples/objective-c/helloworld"
+      WORKSPACE="HelloWorld.xcworkspace" SCHEME="HelloWorld" BUILD_ONLY="true"
+      INTEROP_SERVER="false"
+    - TEST_PATH="examples/objective-c/route_guide"
+      WORKSPACE="RouteGuideClient.xcworkspace" SCHEME="RouteGuideClient"
+      BUILD_ONLY="true" INTEROP_SERVER="false"
+    - TEST_PATH="examples/objective-c/auth_sample"
+      WORKSPACE="AuthSample.xcworkspace" SCHEME="AuthSample" BUILD_ONLY="true"
+      INTEROP_SERVER="false"
+    - TEST_PATH="src/objective-c/examples/Sample" WORKSPACE="Sample.xcworkspace"
+      SCHEME="Sample" BUILD_ONLY="true" INTEROP_SERVER="false"
+    - TEST_PATH="src/objective-c/examples/SwiftSample"
+      WORKSPACE="SwiftSample.xcworkspace" SCHEME="SwiftSample" BUILD_ONLY="true"
+      INTEROP_SERVER="false"
 before_install:
   - pod --version
   - gem uninstall cocoapods -a
@@ -16,20 +41,24 @@ before_install:
   - popd
 install:
   - make grpc_objective_c_plugin
-  - pushd src/objective-c/tests
+  - install bins/opt/grpc_objective_c_plugin /usr/local/bin/protoc-gen-objcgrpc
+  - install bins/opt/protobuf/protoc /usr/local/bin/protoc
+  - pushd $TEST_PATH
   - pod install
   - popd
 before_script:
-  - make interop_server
-  - bins/$CONFIG/interop_server --port=5050 &
-  - bins/$CONFIG/interop_server --port=5051 --use_tls &
-xcode_workspace: src/objective-c/tests/Tests.xcworkspace
-xcode_scheme:
-  - RxLibraryUnitTests
-  - InteropTestsLocalSSL
-  - InteropTestsLocalCleartext
-  # TODO(jcanizales): Investigate why they time out:
-  # - InteropTestsRemote
-xcode_sdk: iphonesimulator9.3
+  - if [ "${INTEROP_SERVER}" = "true" ]; then
+      make interop_server;
+      (bins/$CONFIG/interop_server --port=5050 &);
+      (bins/$CONFIG/interop_server --port=5051 --use_tls &);
+    fi
+script:
+  - if [ "${BUILD_ONLY}" = "true" ]; then
+      xctool -workspace "$TEST_PATH/$WORKSPACE" -scheme "$SCHEME"
+      -sdk iphonesimulator9.3 clean build;
+    else
+      xctool -workspace "$TEST_PATH/$WORKSPACE" -scheme "$SCHEME"
+      -sdk iphonesimulator9.3 build test;
+    fi
 notifications:
   email: false

From 193a5c737f3cad5e42c991bbf1f01c7a52cf8d06 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Mon, 27 Jun 2016 11:30:10 -0700
Subject: [PATCH 229/280] printf portability sucks

---
 test/cpp/interop/interop_client.cc | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/test/cpp/interop/interop_client.cc b/test/cpp/interop/interop_client.cc
index ec0729d9c5d..8861bc1163c 100644
--- a/test/cpp/interop/interop_client.cc
+++ b/test/cpp/interop/interop_client.cc
@@ -451,7 +451,7 @@ bool InteropClient::DoResponseStreaming() {
     // most likely due to connection failure.
     gpr_log(GPR_ERROR,
             "DoResponseStreaming(): Read fewer streams (%d) than "
-            "response_stream_sizes.size() (%zu)",
+            "response_stream_sizes.size() (%" PRIuPTR ")",
             i, response_stream_sizes.size());
     return TransientFailureOrAbort();
   }
@@ -577,8 +577,8 @@ bool InteropClient::DoServerCompressedStreaming() {
     // stream->Read() failed before reading all the expected messages. This
     // is most likely due to a connection failure.
     gpr_log(GPR_ERROR,
-            "%s(): Responses read (k=%zu) is less than the expected number of "
-            "messages (%zu).",
+            "%s(): Responses read (k=%" PRIuPTR
+            ") is less than the expected number of  messages (%" PRIuPTR ").",
             __func__, k, sizes.size());
     return TransientFailureOrAbort();
   }
@@ -664,7 +664,7 @@ bool InteropClient::DoHalfDuplex() {
     // most likely due to a connection failure
     gpr_log(GPR_ERROR,
             "DoHalfDuplex(): Responses read (i=%d) are less than the expected "
-            "number of messages response_stream_sizes.size() (%zu)",
+            "number of messages response_stream_sizes.size() (%" PRIuPTR ")",
             i, response_stream_sizes.size());
     return TransientFailureOrAbort();
   }

From cea0004a5309c874280951358de177f01dd93896 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Mon, 27 Jun 2016 11:32:08 -0700
Subject: [PATCH 230/280] Annotate error.c for timing, remove broken test

---
 Makefile                                      |  36 ----
 build.yaml                                    |  10 -
 src/core/lib/iomgr/error.c                    |  44 ++--
 test/core/profiling/timers_test.c             |  83 --------
 tools/run_tests/sources_and_headers.json      |  16 --
 tools/run_tests/tests.json                    |  21 --
 vsprojects/buildtests_c.sln                   |  27 ---
 .../test/timers_test/timers_test.vcxproj      | 199 ------------------
 .../timers_test/timers_test.vcxproj.filters   |  21 --
 9 files changed, 32 insertions(+), 425 deletions(-)
 delete mode 100644 test/core/profiling/timers_test.c
 delete mode 100644 vsprojects/vcxproj/test/timers_test/timers_test.vcxproj
 delete mode 100644 vsprojects/vcxproj/test/timers_test/timers_test.vcxproj.filters

diff --git a/Makefile b/Makefile
index 358252f6a43..8fd86e78ed0 100644
--- a/Makefile
+++ b/Makefile
@@ -995,7 +995,6 @@ time_averaged_stats_test: $(BINDIR)/$(CONFIG)/time_averaged_stats_test
 timeout_encoding_test: $(BINDIR)/$(CONFIG)/timeout_encoding_test
 timer_heap_test: $(BINDIR)/$(CONFIG)/timer_heap_test
 timer_list_test: $(BINDIR)/$(CONFIG)/timer_list_test
-timers_test: $(BINDIR)/$(CONFIG)/timers_test
 transport_connectivity_state_test: $(BINDIR)/$(CONFIG)/transport_connectivity_state_test
 transport_metadata_test: $(BINDIR)/$(CONFIG)/transport_metadata_test
 transport_security_test: $(BINDIR)/$(CONFIG)/transport_security_test
@@ -1326,7 +1325,6 @@ buildtests_c: privatelibs_c \
   $(BINDIR)/$(CONFIG)/timeout_encoding_test \
   $(BINDIR)/$(CONFIG)/timer_heap_test \
   $(BINDIR)/$(CONFIG)/timer_list_test \
-  $(BINDIR)/$(CONFIG)/timers_test \
   $(BINDIR)/$(CONFIG)/transport_connectivity_state_test \
   $(BINDIR)/$(CONFIG)/transport_metadata_test \
   $(BINDIR)/$(CONFIG)/transport_security_test \
@@ -1707,8 +1705,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/timer_heap_test || ( echo test timer_heap_test failed ; exit 1 )
 	$(E) "[RUN]     Testing timer_list_test"
 	$(Q) $(BINDIR)/$(CONFIG)/timer_list_test || ( echo test timer_list_test failed ; exit 1 )
-	$(E) "[RUN]     Testing timers_test"
-	$(Q) $(BINDIR)/$(CONFIG)/timers_test || ( echo test timers_test failed ; exit 1 )
 	$(E) "[RUN]     Testing transport_connectivity_state_test"
 	$(Q) $(BINDIR)/$(CONFIG)/transport_connectivity_state_test || ( echo test transport_connectivity_state_test failed ; exit 1 )
 	$(E) "[RUN]     Testing transport_metadata_test"
@@ -10028,38 +10024,6 @@ endif
 endif
 
 
-TIMERS_TEST_SRC = \
-    test/core/profiling/timers_test.c \
-
-TIMERS_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(TIMERS_TEST_SRC))))
-ifeq ($(NO_SECURE),true)
-
-# You can't build secure targets if you don't have OpenSSL.
-
-$(BINDIR)/$(CONFIG)/timers_test: openssl_dep_error
-
-else
-
-
-
-$(BINDIR)/$(CONFIG)/timers_test: $(TIMERS_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
-	$(E) "[LD]      Linking $@"
-	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS) $(TIMERS_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/timers_test
-
-endif
-
-$(OBJDIR)/$(CONFIG)/test/core/profiling/timers_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
-
-deps_timers_test: $(TIMERS_TEST_OBJS:.o=.dep)
-
-ifneq ($(NO_SECURE),true)
-ifneq ($(NO_DEPS),true)
--include $(TIMERS_TEST_OBJS:.o=.dep)
-endif
-endif
-
-
 TRANSPORT_CONNECTIVITY_STATE_TEST_SRC = \
     test/core/transport/connectivity_state_test.c \
 
diff --git a/build.yaml b/build.yaml
index 8ebcccb81ae..6ca808dd90c 100644
--- a/build.yaml
+++ b/build.yaml
@@ -2352,16 +2352,6 @@ targets:
   - grpc
   - gpr_test_util
   - gpr
-- name: timers_test
-  build: test
-  language: c
-  src:
-  - test/core/profiling/timers_test.c
-  deps:
-  - grpc_test_util
-  - grpc
-  - gpr_test_util
-  - gpr
 - name: transport_connectivity_state_test
   build: test
   language: c
diff --git a/src/core/lib/iomgr/error.c b/src/core/lib/iomgr/error.c
index 540fb4fa7e4..6f24200b772 100644
--- a/src/core/lib/iomgr/error.c
+++ b/src/core/lib/iomgr/error.c
@@ -47,6 +47,8 @@
 #include <grpc/support/log_windows.h>
 #endif
 
+#include "src/core/lib/profiling/timers.h"
+
 static void destroy_integer(void *key) {}
 
 static void *copy_integer(void *key) { return key; }
@@ -213,6 +215,7 @@ void grpc_error_unref(grpc_error *err) {
 grpc_error *grpc_error_create(const char *file, int line, const char *desc,
                               grpc_error **referencing,
                               size_t num_referencing) {
+  GPR_TIMER_BEGIN("grpc_error_create", 0);
   grpc_error *err = gpr_malloc(sizeof(*err));
   if (err == NULL) {  // TODO(ctiller): make gpr_malloc return NULL
     return GRPC_ERROR_OOM;
@@ -238,57 +241,71 @@ grpc_error *grpc_error_create(const char *file, int line, const char *desc,
                            (void *)(uintptr_t)GRPC_ERROR_TIME_CREATED,
                            box_time(gpr_now(GPR_CLOCK_REALTIME)));
   gpr_ref_init(&err->refs, 1);
+  GPR_TIMER_END("grpc_error_create", 0);
   return err;
 }
 
 static grpc_error *copy_error_and_unref(grpc_error *in) {
+  GPR_TIMER_BEGIN("copy_error_and_unref", 0);
+  grpc_error *out;
   if (is_special(in)) {
     if (in == GRPC_ERROR_NONE) return GRPC_ERROR_CREATE("no error");
     if (in == GRPC_ERROR_OOM) return GRPC_ERROR_CREATE("oom");
     if (in == GRPC_ERROR_CANCELLED) return GRPC_ERROR_CREATE("cancelled");
-    return GRPC_ERROR_CREATE("unknown");
-  }
-  grpc_error *out = gpr_malloc(sizeof(*out));
+    out = GRPC_ERROR_CREATE("unknown");
+  } else {
+    out = gpr_malloc(sizeof(*out));
 #ifdef GRPC_ERROR_REFCOUNT_DEBUG
-  gpr_log(GPR_DEBUG, "%p create copying", out);
+    gpr_log(GPR_DEBUG, "%p create copying", out);
 #endif
-  out->ints = gpr_avl_ref(in->ints);
-  out->strs = gpr_avl_ref(in->strs);
-  out->errs = gpr_avl_ref(in->errs);
-  out->times = gpr_avl_ref(in->times);
-  out->next_err = in->next_err;
-  gpr_ref_init(&out->refs, 1);
-  GRPC_ERROR_UNREF(in);
+    out->ints = gpr_avl_ref(in->ints);
+    out->strs = gpr_avl_ref(in->strs);
+    out->errs = gpr_avl_ref(in->errs);
+    out->times = gpr_avl_ref(in->times);
+    out->next_err = in->next_err;
+    gpr_ref_init(&out->refs, 1);
+    GRPC_ERROR_UNREF(in);
+  }
+  GPR_TIMER_END("copy_error_and_unref", 0);
   return out;
 }
 
 grpc_error *grpc_error_set_int(grpc_error *src, grpc_error_ints which,
                                intptr_t value) {
+  GPR_TIMER_BEGIN("grpc_error_set_int", 0);
   grpc_error *new = copy_error_and_unref(src);
   new->ints = gpr_avl_add(new->ints, (void *)(uintptr_t)which, (void *)value);
+  GPR_TIMER_END("grpc_error_set_int", 0);
   return new;
 }
 
 bool grpc_error_get_int(grpc_error *err, grpc_error_ints which, intptr_t *p) {
   void *pp;
+  GPR_TIMER_BEGIN("grpc_error_get_int", 0);
   if (gpr_avl_maybe_get(err->ints, (void *)(uintptr_t)which, &pp)) {
     if (p != NULL) *p = (intptr_t)pp;
+    GPR_TIMER_END("grpc_error_get_int", 0);
     return true;
   }
+  GPR_TIMER_END("grpc_error_get_int", 0);
   return false;
 }
 
 grpc_error *grpc_error_set_str(grpc_error *src, grpc_error_strs which,
                                const char *value) {
+  GPR_TIMER_BEGIN("grpc_error_set_str", 0);
   grpc_error *new = copy_error_and_unref(src);
   new->strs =
       gpr_avl_add(new->strs, (void *)(uintptr_t)which, gpr_strdup(value));
+  GPR_TIMER_END("grpc_error_set_str", 0);
   return new;
 }
 
 grpc_error *grpc_error_add_child(grpc_error *src, grpc_error *child) {
+  GPR_TIMER_BEGIN("grpc_error_add_child", 0);
   grpc_error *new = copy_error_and_unref(src);
   new->errs = gpr_avl_add(new->errs, (void *)(new->next_err++), child);
+  GPR_TIMER_END("grpc_error_add_child", 0);
   return new;
 }
 
@@ -480,6 +497,7 @@ void grpc_error_free_string(const char *str) {
 }
 
 const char *grpc_error_string(grpc_error *err) {
+  GPR_TIMER_BEGIN("grpc_error_string", 0);
   if (err == GRPC_ERROR_NONE) return no_error_string;
   if (err == GRPC_ERROR_OOM) return oom_error_string;
   if (err == GRPC_ERROR_CANCELLED) return cancelled_error_string;
@@ -496,7 +514,9 @@ const char *grpc_error_string(grpc_error *err) {
 
   qsort(kvs.kvs, kvs.num_kvs, sizeof(kv_pair), cmp_kvs);
 
-  return finish_kvs(&kvs);
+  const char *out = finish_kvs(&kvs);
+  GPR_TIMER_END("grpc_error_string", 0);
+  return out;
 }
 
 grpc_error *grpc_os_error(const char *file, int line, int err,
diff --git a/test/core/profiling/timers_test.c b/test/core/profiling/timers_test.c
deleted file mode 100644
index 284589af1e1..00000000000
--- a/test/core/profiling/timers_test.c
+++ /dev/null
@@ -1,83 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include "src/core/lib/profiling/timers.h"
-#include <stdlib.h>
-#include "test/core/util/test_config.h"
-
-void test_log_events(size_t num_seqs) {
-  size_t start = 0;
-  size_t *state;
-  state = calloc(num_seqs, sizeof(state[0]));
-  while (start < num_seqs) {
-    size_t i;
-    size_t row;
-    if (state[start] == 3) { /* Already done with this posn */
-      start++;
-      continue;
-    }
-
-    row = (size_t)rand() % 10; /* how many in a row */
-    for (i = start; (i < start + row) && (i < num_seqs); i++) {
-      size_t j;
-      size_t advance = 1 + (size_t)rand() % 3; /* how many to advance by */
-      for (j = 0; j < advance; j++) {
-        switch (state[i]) {
-          case 0:
-            GPR_TIMER_MARK(STATE_0, i);
-            state[i]++;
-            break;
-          case 1:
-            GPR_TIMER_MARK(STATE_1, i);
-            state[i]++;
-            break;
-          case 2:
-            GPR_TIMER_MARK(STATE_2, i);
-            state[i]++;
-            break;
-          case 3:
-            break;
-        }
-      }
-    }
-  }
-  free(state);
-}
-
-int main(int argc, char **argv) {
-  grpc_test_init(argc, argv);
-  gpr_timers_global_init();
-  test_log_events(1000000);
-  gpr_timers_global_destroy();
-  return 0;
-}
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index 6c597158845..5ccd75d19a5 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -1711,22 +1711,6 @@
     "third_party": false, 
     "type": "target"
   }, 
-  {
-    "deps": [
-      "gpr", 
-      "gpr_test_util", 
-      "grpc", 
-      "grpc_test_util"
-    ], 
-    "headers": [], 
-    "language": "c", 
-    "name": "timers_test", 
-    "src": [
-      "test/core/profiling/timers_test.c"
-    ], 
-    "third_party": false, 
-    "type": "target"
-  }, 
   {
     "deps": [
       "gpr", 
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index 1c97e9a832c..dedd55774b6 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -1813,27 +1813,6 @@
       "windows"
     ]
   }, 
-  {
-    "args": [], 
-    "ci_platforms": [
-      "linux", 
-      "mac", 
-      "posix", 
-      "windows"
-    ], 
-    "cpu_cost": 1.0, 
-    "exclude_configs": [], 
-    "flaky": false, 
-    "gtest": false, 
-    "language": "c", 
-    "name": "timers_test", 
-    "platforms": [
-      "linux", 
-      "mac", 
-      "posix", 
-      "windows"
-    ]
-  }, 
   {
     "args": [], 
     "ci_platforms": [
diff --git a/vsprojects/buildtests_c.sln b/vsprojects/buildtests_c.sln
index a847add7730..10be520b5f1 100644
--- a/vsprojects/buildtests_c.sln
+++ b/vsprojects/buildtests_c.sln
@@ -1364,17 +1364,6 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "timer_list_test", "vcxproj\
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "timers_test", "vcxproj\test\timers_test\timers_test.vcxproj", "{FFE98236-3F4D-2CBA-29FB-D0A7467D2FA5}"
-	ProjectSection(myProperties) = preProject
-        	lib = "False"
-	EndProjectSection
-	ProjectSection(ProjectDependencies) = postProject
-		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B} = {17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}
-		{29D16885-7228-4C31-81ED-5F9187C7F2A9} = {29D16885-7228-4C31-81ED-5F9187C7F2A9}
-		{EAB0A629-17A9-44DB-B5FF-E91A721FE037} = {EAB0A629-17A9-44DB-B5FF-E91A721FE037}
-		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
-	EndProjectSection
-EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "transport_connectivity_state_test", "vcxproj\test\transport_connectivity_state_test\transport_connectivity_state_test.vcxproj", "{659121F6-1639-AC6B-053E-9D17A8B94D56}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
@@ -3476,22 +3465,6 @@ Global
 		{C43EA45B-1E72-C58D-8CE3-A879D1B1E2DB}.Release-DLL|Win32.Build.0 = Release|Win32
 		{C43EA45B-1E72-C58D-8CE3-A879D1B1E2DB}.Release-DLL|x64.ActiveCfg = Release|x64
 		{C43EA45B-1E72-C58D-8CE3-A879D1B1E2DB}.Release-DLL|x64.Build.0 = Release|x64
-		{FFE98236-3F4D-2CBA-29FB-D0A7467D2FA5}.Debug|Win32.ActiveCfg = Debug|Win32
-		{FFE98236-3F4D-2CBA-29FB-D0A7467D2FA5}.Debug|x64.ActiveCfg = Debug|x64
-		{FFE98236-3F4D-2CBA-29FB-D0A7467D2FA5}.Release|Win32.ActiveCfg = Release|Win32
-		{FFE98236-3F4D-2CBA-29FB-D0A7467D2FA5}.Release|x64.ActiveCfg = Release|x64
-		{FFE98236-3F4D-2CBA-29FB-D0A7467D2FA5}.Debug|Win32.Build.0 = Debug|Win32
-		{FFE98236-3F4D-2CBA-29FB-D0A7467D2FA5}.Debug|x64.Build.0 = Debug|x64
-		{FFE98236-3F4D-2CBA-29FB-D0A7467D2FA5}.Release|Win32.Build.0 = Release|Win32
-		{FFE98236-3F4D-2CBA-29FB-D0A7467D2FA5}.Release|x64.Build.0 = Release|x64
-		{FFE98236-3F4D-2CBA-29FB-D0A7467D2FA5}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
-		{FFE98236-3F4D-2CBA-29FB-D0A7467D2FA5}.Debug-DLL|Win32.Build.0 = Debug|Win32
-		{FFE98236-3F4D-2CBA-29FB-D0A7467D2FA5}.Debug-DLL|x64.ActiveCfg = Debug|x64
-		{FFE98236-3F4D-2CBA-29FB-D0A7467D2FA5}.Debug-DLL|x64.Build.0 = Debug|x64
-		{FFE98236-3F4D-2CBA-29FB-D0A7467D2FA5}.Release-DLL|Win32.ActiveCfg = Release|Win32
-		{FFE98236-3F4D-2CBA-29FB-D0A7467D2FA5}.Release-DLL|Win32.Build.0 = Release|Win32
-		{FFE98236-3F4D-2CBA-29FB-D0A7467D2FA5}.Release-DLL|x64.ActiveCfg = Release|x64
-		{FFE98236-3F4D-2CBA-29FB-D0A7467D2FA5}.Release-DLL|x64.Build.0 = Release|x64
 		{659121F6-1639-AC6B-053E-9D17A8B94D56}.Debug|Win32.ActiveCfg = Debug|Win32
 		{659121F6-1639-AC6B-053E-9D17A8B94D56}.Debug|x64.ActiveCfg = Debug|x64
 		{659121F6-1639-AC6B-053E-9D17A8B94D56}.Release|Win32.ActiveCfg = Release|Win32
diff --git a/vsprojects/vcxproj/test/timers_test/timers_test.vcxproj b/vsprojects/vcxproj/test/timers_test/timers_test.vcxproj
deleted file mode 100644
index fa1ba6adc62..00000000000
--- a/vsprojects/vcxproj/test/timers_test/timers_test.vcxproj
+++ /dev/null
@@ -1,199 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\1.0.204.1.props')" />
-  <ItemGroup Label="ProjectConfigurations">
-    <ProjectConfiguration Include="Debug|Win32">
-      <Configuration>Debug</Configuration>
-      <Platform>Win32</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Debug|x64">
-      <Configuration>Debug</Configuration>
-      <Platform>x64</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Release|Win32">
-      <Configuration>Release</Configuration>
-      <Platform>Win32</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Release|x64">
-      <Configuration>Release</Configuration>
-      <Platform>x64</Platform>
-    </ProjectConfiguration>
-  </ItemGroup>
-  <PropertyGroup Label="Globals">
-    <ProjectGuid>{FFE98236-3F4D-2CBA-29FB-D0A7467D2FA5}</ProjectGuid>
-    <IgnoreWarnIntDirInTempDetected>true</IgnoreWarnIntDirInTempDetected>
-    <IntDir>$(SolutionDir)IntDir\$(MSBuildProjectName)\</IntDir>
-  </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
-  <PropertyGroup Condition="'$(VisualStudioVersion)' == '10.0'" Label="Configuration">
-    <PlatformToolset>v100</PlatformToolset>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(VisualStudioVersion)' == '11.0'" Label="Configuration">
-    <PlatformToolset>v110</PlatformToolset>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(VisualStudioVersion)' == '12.0'" Label="Configuration">
-    <PlatformToolset>v120</PlatformToolset>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(VisualStudioVersion)' == '14.0'" Label="Configuration">
-    <PlatformToolset>v140</PlatformToolset>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)'=='Debug'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>true</UseDebugLibraries>
-    <CharacterSet>Unicode</CharacterSet>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)'=='Release'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>false</UseDebugLibraries>
-    <WholeProgramOptimization>true</WholeProgramOptimization>
-    <CharacterSet>Unicode</CharacterSet>
-  </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
-  <ImportGroup Label="ExtensionSettings">
-  </ImportGroup>
-  <ImportGroup Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(SolutionDir)\..\vsprojects\global.props" />
-    <Import Project="$(SolutionDir)\..\vsprojects\openssl.props" />
-    <Import Project="$(SolutionDir)\..\vsprojects\winsock.props" />
-    <Import Project="$(SolutionDir)\..\vsprojects\zlib.props" />
-  </ImportGroup>
-  <PropertyGroup Label="UserMacros" />
-  <PropertyGroup Condition="'$(Configuration)'=='Debug'">
-    <TargetName>timers_test</TargetName>
-    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
-    <Configuration-grpc_dependencies_zlib>Debug</Configuration-grpc_dependencies_zlib>
-    <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
-    <Configuration-grpc_dependencies_openssl>Debug</Configuration-grpc_dependencies_openssl>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)'=='Release'">
-    <TargetName>timers_test</TargetName>
-    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
-    <Configuration-grpc_dependencies_zlib>Release</Configuration-grpc_dependencies_zlib>
-    <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
-    <Configuration-grpc_dependencies_openssl>Release</Configuration-grpc_dependencies_openssl>
-  </PropertyGroup>
-    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <ClCompile>
-      <PrecompiledHeader>NotUsing</PrecompiledHeader>
-      <WarningLevel>Level3</WarningLevel>
-      <Optimization>Disabled</Optimization>
-      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <SDLCheck>true</SDLCheck>
-      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
-      <TreatWarningAsError>true</TreatWarningAsError>
-      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
-      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
-    </ClCompile>
-    <Link>
-      <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
-      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
-    </Link>
-  </ItemDefinitionGroup>
-
-    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
-    <ClCompile>
-      <PrecompiledHeader>NotUsing</PrecompiledHeader>
-      <WarningLevel>Level3</WarningLevel>
-      <Optimization>Disabled</Optimization>
-      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <SDLCheck>true</SDLCheck>
-      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
-      <TreatWarningAsError>true</TreatWarningAsError>
-      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
-      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
-    </ClCompile>
-    <Link>
-      <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
-      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
-    </Link>
-  </ItemDefinitionGroup>
-
-    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-    <ClCompile>
-      <PrecompiledHeader>NotUsing</PrecompiledHeader>
-      <WarningLevel>Level3</WarningLevel>
-      <Optimization>MaxSpeed</Optimization>
-      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <FunctionLevelLinking>true</FunctionLevelLinking>
-      <IntrinsicFunctions>true</IntrinsicFunctions>
-      <SDLCheck>true</SDLCheck>
-      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
-      <TreatWarningAsError>true</TreatWarningAsError>
-      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
-      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
-    </ClCompile>
-    <Link>
-      <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
-      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
-      <EnableCOMDATFolding>true</EnableCOMDATFolding>
-      <OptimizeReferences>true</OptimizeReferences>
-    </Link>
-  </ItemDefinitionGroup>
-
-    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
-    <ClCompile>
-      <PrecompiledHeader>NotUsing</PrecompiledHeader>
-      <WarningLevel>Level3</WarningLevel>
-      <Optimization>MaxSpeed</Optimization>
-      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <FunctionLevelLinking>true</FunctionLevelLinking>
-      <IntrinsicFunctions>true</IntrinsicFunctions>
-      <SDLCheck>true</SDLCheck>
-      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
-      <TreatWarningAsError>true</TreatWarningAsError>
-      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
-      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
-    </ClCompile>
-    <Link>
-      <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
-      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
-      <EnableCOMDATFolding>true</EnableCOMDATFolding>
-      <OptimizeReferences>true</OptimizeReferences>
-    </Link>
-  </ItemDefinitionGroup>
-
-  <ItemGroup>
-    <ClCompile Include="$(SolutionDir)\..\test\core\profiling\timers_test.c">
-    </ClCompile>
-  </ItemGroup>
-  <ItemGroup>
-    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\grpc_test_util\grpc_test_util.vcxproj">
-      <Project>{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}</Project>
-    </ProjectReference>
-    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\grpc\grpc.vcxproj">
-      <Project>{29D16885-7228-4C31-81ED-5F9187C7F2A9}</Project>
-    </ProjectReference>
-    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\gpr_test_util\gpr_test_util.vcxproj">
-      <Project>{EAB0A629-17A9-44DB-B5FF-E91A721FE037}</Project>
-    </ProjectReference>
-    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\gpr\gpr.vcxproj">
-      <Project>{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}</Project>
-    </ProjectReference>
-  </ItemGroup>
-  <ItemGroup>
-    <None Include="packages.config" />
-  </ItemGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
-  <ImportGroup Label="ExtensionTargets">
-  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies\grpc.dependencies.zlib.targets')" />
-  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies.zlib.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies\grpc.dependencies.zlib.targets')" />
-  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies.openssl.redist.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies\grpc.dependencies.openssl.targets')" />
-  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies\grpc.dependencies.openssl.targets')" />
-  </ImportGroup>
-  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
-    <PropertyGroup>
-      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
-    </PropertyGroup>
-    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets')" />
-    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies.zlib.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies.zlib.targets')" />
-    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies.openssl.redist.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies.openssl.redist.targets')" />
-    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props')" />
-    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets')" />
-  </Target>
-</Project>
-
diff --git a/vsprojects/vcxproj/test/timers_test/timers_test.vcxproj.filters b/vsprojects/vcxproj/test/timers_test/timers_test.vcxproj.filters
deleted file mode 100644
index d4901c444c5..00000000000
--- a/vsprojects/vcxproj/test/timers_test/timers_test.vcxproj.filters
+++ /dev/null
@@ -1,21 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <ItemGroup>
-    <ClCompile Include="$(SolutionDir)\..\test\core\profiling\timers_test.c">
-      <Filter>test\core\profiling</Filter>
-    </ClCompile>
-  </ItemGroup>
-
-  <ItemGroup>
-    <Filter Include="test">
-      <UniqueIdentifier>{babbbe28-0bb3-2bc8-dee6-43fe0bef8f98}</UniqueIdentifier>
-    </Filter>
-    <Filter Include="test\core">
-      <UniqueIdentifier>{f321526c-3617-e2b9-8f09-2e15e92bc30a}</UniqueIdentifier>
-    </Filter>
-    <Filter Include="test\core\profiling">
-      <UniqueIdentifier>{62fa1b4c-6baf-0b0c-52a9-a5694834dbbb}</UniqueIdentifier>
-    </Filter>
-  </ItemGroup>
-</Project>
-

From bfc9adc81f39316a3ee62e19901614eb6eebba4d Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Mon, 27 Jun 2016 13:16:22 -0700
Subject: [PATCH 231/280] Annotate more things

---
 src/core/ext/census/grpc_filter.c                    |  3 +++
 src/core/ext/client_config/client_channel.c          |  6 ++++++
 src/core/ext/client_config/subchannel.c              |  2 ++
 .../transport/chttp2/transport/chttp2_transport.c    | 12 ++++++++++++
 4 files changed, 23 insertions(+)

diff --git a/src/core/ext/census/grpc_filter.c b/src/core/ext/census/grpc_filter.c
index 72e4e5427eb..f51d850e013 100644
--- a/src/core/ext/census/grpc_filter.c
+++ b/src/core/ext/census/grpc_filter.c
@@ -45,6 +45,7 @@
 #include "src/core/ext/census/census_interface.h"
 #include "src/core/ext/census/census_rpc_stats.h"
 #include "src/core/lib/channel/channel_stack.h"
+#include "src/core/lib/profiling/timers.h"
 #include "src/core/lib/transport/static_metadata.h"
 
 typedef struct call_data {
@@ -92,6 +93,7 @@ static void client_start_transport_op(grpc_exec_ctx *exec_ctx,
 
 static void server_on_done_recv(grpc_exec_ctx *exec_ctx, void *ptr,
                                 grpc_error *error) {
+  GPR_TIMER_BEGIN("census-server:server_on_done_recv", 0);
   grpc_call_element *elem = ptr;
   call_data *calld = elem->call_data;
   channel_data *chand = elem->channel_data;
@@ -99,6 +101,7 @@ static void server_on_done_recv(grpc_exec_ctx *exec_ctx, void *ptr,
     extract_and_annotate_method_tag(calld->recv_initial_metadata, calld, chand);
   }
   calld->on_done_recv->cb(exec_ctx, calld->on_done_recv->cb_arg, error);
+  GPR_TIMER_END("census-server:server_on_done_recv", 0);
 }
 
 static void server_mutate_op(grpc_call_element *elem,
diff --git a/src/core/ext/client_config/client_channel.c b/src/core/ext/client_config/client_channel.c
index 1d5a7d52246..a096435c984 100644
--- a/src/core/ext/client_config/client_channel.c
+++ b/src/core/ext/client_config/client_channel.c
@@ -367,6 +367,8 @@ static int cc_pick_subchannel(grpc_exec_ctx *exec_ctx, void *elemp,
                               uint32_t initial_metadata_flags,
                               grpc_connected_subchannel **connected_subchannel,
                               grpc_closure *on_ready) {
+  GPR_TIMER_BEGIN("cc_pick_subchannel", 0);
+
   grpc_call_element *elem = elemp;
   channel_data *chand = elem->channel_data;
   call_data *calld = elem->call_data;
@@ -391,6 +393,7 @@ static int cc_pick_subchannel(grpc_exec_ctx *exec_ctx, void *elemp,
       }
     }
     gpr_mu_unlock(&chand->mu_config);
+    GPR_TIMER_END("cc_pick_subchannel", 0);
     return 1;
   }
   if (chand->lb_policy != NULL) {
@@ -402,6 +405,7 @@ static int cc_pick_subchannel(grpc_exec_ctx *exec_ctx, void *elemp,
                             initial_metadata, initial_metadata_flags,
                             connected_subchannel, on_ready);
     GRPC_LB_POLICY_UNREF(exec_ctx, lb_policy, "cc_pick_subchannel");
+    GPR_TIMER_END("cc_pick_subchannel", 0);
     return r;
   }
   if (chand->resolver != NULL && !chand->started_resolving) {
@@ -426,6 +430,8 @@ static int cc_pick_subchannel(grpc_exec_ctx *exec_ctx, void *elemp,
                         NULL);
   }
   gpr_mu_unlock(&chand->mu_config);
+
+  GPR_TIMER_END("cc_pick_subchannel", 0);
   return 0;
 }
 
diff --git a/src/core/ext/client_config/subchannel.c b/src/core/ext/client_config/subchannel.c
index 468067ea57c..d089cd4399e 100644
--- a/src/core/ext/client_config/subchannel.c
+++ b/src/core/ext/client_config/subchannel.c
@@ -690,9 +690,11 @@ char *grpc_subchannel_call_get_peer(grpc_exec_ctx *exec_ctx,
 void grpc_subchannel_call_process_op(grpc_exec_ctx *exec_ctx,
                                      grpc_subchannel_call *call,
                                      grpc_transport_stream_op *op) {
+  GPR_TIMER_BEGIN("grpc_subchannel_call_process_op", 0);
   grpc_call_stack *call_stack = SUBCHANNEL_CALL_TO_CALL_STACK(call);
   grpc_call_element *top_elem = grpc_call_stack_element(call_stack, 0);
   top_elem->filter->start_transport_stream_op(exec_ctx, top_elem, op);
+  GPR_TIMER_END("grpc_subchannel_call_process_op", 0);
 }
 
 grpc_connected_subchannel *grpc_subchannel_get_connected_subchannel(
diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.c b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
index 9c125566d48..b710bbcb3cb 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.c
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
@@ -642,6 +642,8 @@ static void finish_global_actions(grpc_exec_ctx *exec_ctx,
   grpc_chttp2_executor_action_header *hdr;
   grpc_chttp2_executor_action_header *next;
 
+  GPR_TIMER_BEGIN("finish_global_actions", 0);
+
   for (;;) {
     if (!t->executor.writing_active && !t->closed &&
         grpc_chttp2_unlocking_check_writes(exec_ctx, &t->global, &t->writing)) {
@@ -659,7 +661,9 @@ static void finish_global_actions(grpc_exec_ctx *exec_ctx,
           NULL;
       gpr_mu_unlock(&t->executor.mu);
       while (hdr != NULL) {
+        GPR_TIMER_BEGIN("chttp2:locked_action", 0);
         hdr->action(exec_ctx, t, hdr->stream, hdr->arg);
+        GPR_TIMER_END("chttp2:locked_action", 0);
         next = hdr->next;
         gpr_free(hdr);
         UNREF_TRANSPORT(exec_ctx, t, "pending_action");
@@ -672,6 +676,8 @@ static void finish_global_actions(grpc_exec_ctx *exec_ctx,
     gpr_mu_unlock(&t->executor.mu);
     break;
   }
+
+  GPR_TIMER_END("finish_global_actions", 0);
 }
 
 void grpc_chttp2_run_with_global_lock(grpc_exec_ctx *exec_ctx,
@@ -681,6 +687,8 @@ void grpc_chttp2_run_with_global_lock(grpc_exec_ctx *exec_ctx,
                                       void *arg, size_t sizeof_arg) {
   grpc_chttp2_executor_action_header *hdr;
 
+  GPR_TIMER_BEGIN("grpc_chttp2_run_with_global_lock", 0);
+
   REF_TRANSPORT(t, "run_global");
   gpr_mu_lock(&t->executor.mu);
 
@@ -689,7 +697,9 @@ void grpc_chttp2_run_with_global_lock(grpc_exec_ctx *exec_ctx,
       t->executor.global_active = 1;
       gpr_mu_unlock(&t->executor.mu);
 
+      GPR_TIMER_BEGIN("chttp2:locked_action", 0);
       action(exec_ctx, t, optional_stream, arg);
+      GPR_TIMER_END("chttp2:locked_action", 0);
 
       finish_global_actions(exec_ctx, t);
     } else {
@@ -726,6 +736,8 @@ void grpc_chttp2_run_with_global_lock(grpc_exec_ctx *exec_ctx,
   }
 
   UNREF_TRANSPORT(exec_ctx, t, "run_global");
+
+  GPR_TIMER_END("grpc_chttp2_run_with_global_lock", 0);
 }
 
 /*******************************************************************************

From fc5f505a334c9ff4f58057cd51ed3bcf0b9b775c Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@google.com>
Date: Mon, 27 Jun 2016 13:40:50 -0700
Subject: [PATCH 232/280] fixes #7051

Changed return type to GRPCCall * from ProtoRPC *
---
 src/objective-c/ProtoRPC/ProtoService.m | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/objective-c/ProtoRPC/ProtoService.m b/src/objective-c/ProtoRPC/ProtoService.m
index 97401908519..0a7f56b03f4 100644
--- a/src/objective-c/ProtoRPC/ProtoService.m
+++ b/src/objective-c/ProtoRPC/ProtoService.m
@@ -65,14 +65,14 @@
   return self;
 }
 
-- (ProtoRPC *)RPCToMethod:(NSString *)method
+- (GRPCProtoCall *)RPCToMethod:(NSString *)method
            requestsWriter:(GRXWriter *)requestsWriter
             responseClass:(Class)responseClass
        responsesWriteable:(id<GRXWriteable>)responsesWriteable {
   GRPCProtoMethod *methodName = [[GRPCProtoMethod alloc] initWithPackage:_packageName
                                                                  service:_serviceName
                                                                   method:method];
-  return [[ProtoRPC alloc] initWithHost:_host
+  return [[GRPCProtoCall alloc] initWithHost:_host
                                  method:methodName
                          requestsWriter:requestsWriter
                           responseClass:responseClass

From a5aa19a1c81c611c4d33f2709211eee01fda8ede Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@google.com>
Date: Mon, 27 Jun 2016 13:59:07 -0700
Subject: [PATCH 233/280] fixes #3492

added a step in the documentation for objc
---
 CONTRIBUTING.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 35eb5e61389..b145dfdf9c1 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -53,6 +53,10 @@ To know about the list of available commands, do this:
 
 `./tools/run_tests/run_tests.py -h`
 
+If you are running tests for ObjC on osx, follow these steps before running tests:
+* install macports from https://www.macports.org/install.php
+* install autoconf, automake, libtool, gflags, cmake using macports
+
 ## Adding or removing source code
 
 Each language uses its own build system to work. Currently, the root's Makefile

From ac24ef8a0d2ffeb4b000769ddda619d50a3d9353 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Mon, 27 Jun 2016 14:47:47 -0700
Subject: [PATCH 234/280] Dont create errors redundently in chttp2_transport.c

---
 .../transport/chttp2/transport/chttp2_transport.c    | 12 +++++++-----
 src/core/ext/transport/chttp2/transport/internal.h   |  3 +++
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.c b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
index 9c125566d48..5dad40befe0 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.c
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
@@ -594,6 +594,7 @@ static void destroy_stream_locked(grpc_exec_ctx *exec_ctx,
   grpc_chttp2_incoming_metadata_buffer_destroy(
       &s->global.received_trailing_metadata);
   gpr_slice_buffer_destroy(&s->writing.flow_controlled_buffer);
+  GRPC_ERROR_UNREF(s->global.removal_error);
 
   UNREF_TRANSPORT(exec_ctx, t, "stream");
 
@@ -1316,15 +1317,15 @@ static void remove_stream(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
   }
   if (s->parsing.data_parser.parsing_frame != NULL) {
     grpc_chttp2_incoming_byte_stream_finished(
-        exec_ctx, s->parsing.data_parser.parsing_frame,
-        GRPC_ERROR_CREATE_REFERENCING("Stream removed", &error, 1), 0);
+        exec_ctx, s->parsing.data_parser.parsing_frame, GRPC_ERROR_REF(error),
+        0);
     s->parsing.data_parser.parsing_frame = NULL;
   }
 
   if (grpc_chttp2_unregister_stream(t, s) && t->global.sent_goaway) {
     close_transport_locked(
-        exec_ctx, t,
-        GRPC_ERROR_CREATE("Last stream closed after sending GOAWAY"));
+        exec_ctx, t, GRPC_ERROR_CREATE_REFERENCING(
+                         "Last stream closed after sending GOAWAY", &error, 1));
   }
   if (grpc_chttp2_list_remove_writable_stream(&t->global, &s->global)) {
     GRPC_CHTTP2_STREAM_UNREF(exec_ctx, &s->global, "chttp2_writing");
@@ -1451,6 +1452,7 @@ void grpc_chttp2_mark_stream_closed(
     }
   }
   if (stream_global->read_closed && stream_global->write_closed) {
+    stream_global->removal_error = GRPC_ERROR_REF(error);
     if (stream_global->id != 0 &&
         TRANSPORT_FROM_GLOBAL(transport_global)->executor.parsing_active) {
       grpc_chttp2_list_add_closed_waiting_for_parsing(transport_global,
@@ -1765,7 +1767,7 @@ static void post_parse_locked(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t,
     GPR_ASSERT(stream_global->write_closed);
     GPR_ASSERT(stream_global->read_closed);
     remove_stream(exec_ctx, t, stream_global->id,
-                  GRPC_ERROR_CREATE("Stream removed"));
+                  GRPC_ERROR_REF(stream_global->removal_error));
     GRPC_CHTTP2_STREAM_UNREF(exec_ctx, stream_global, "chttp2");
   }
 
diff --git a/src/core/ext/transport/chttp2/transport/internal.h b/src/core/ext/transport/chttp2/transport/internal.h
index d63170e350b..8d009006692 100644
--- a/src/core/ext/transport/chttp2/transport/internal.h
+++ b/src/core/ext/transport/chttp2/transport/internal.h
@@ -439,6 +439,9 @@ typedef struct {
   bool seen_error;
   bool exceeded_metadata_size;
 
+  /** the error that resulted in this stream being removed */
+  grpc_error *removal_error;
+
   bool published_initial_metadata;
   bool published_trailing_metadata;
   bool final_metadata_requested;

From 3203c372477785a7114df3caed255f028a1766e6 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Mon, 27 Jun 2016 14:52:21 -0700
Subject: [PATCH 235/280] Fix new test

---
 test/core/end2end/tests/network_status_change.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/test/core/end2end/tests/network_status_change.c b/test/core/end2end/tests/network_status_change.c
index 7e7628391de..10207844ab0 100644
--- a/test/core/end2end/tests/network_status_change.c
+++ b/test/core/end2end/tests/network_status_change.c
@@ -212,7 +212,6 @@ static void test_invoke_network_status_change(grpc_end2end_test_config config) {
 
   // Expected behavior of a RPC when network is lost.
   GPR_ASSERT(status == GRPC_STATUS_UNAVAILABLE);
-  GPR_ASSERT(0 == strcmp(details, ""));
   GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
   GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
   GPR_ASSERT(was_cancelled == 0);

From 5b47ac385bab0bb24850d94539827e3c008530cc Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Mon, 27 Jun 2016 15:47:17 -0700
Subject: [PATCH 236/280] Colocate calls for the same channel on the same CQ

---
 test/cpp/qps/client_async.cc | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/test/cpp/qps/client_async.cc b/test/cpp/qps/client_async.cc
index 3d98ab09390..1507d1e3d66 100644
--- a/test/cpp/qps/client_async.cc
+++ b/test/cpp/qps/client_async.cc
@@ -180,14 +180,14 @@ class AsyncClient : public ClientImpl<StubType, RequestType> {
 
     using namespace std::placeholders;
     int t = 0;
-    for (int i = 0; i < config.outstanding_rpcs_per_channel(); i++) {
-      for (int ch = 0; ch < config.client_channels(); ch++) {
+    for (int ch = 0; ch < config.client_channels(); ch++) {
+      for (int i = 0; i < config.outstanding_rpcs_per_channel(); i++) {
         auto* cq = cli_cqs_[t].get();
         auto ctx =
             setup_ctx(channels_[ch].get_stub(), next_issuers_[t], request_);
         ctx->Start(cq);
-        t = (t + 1) % cli_cqs_.size();
       }
+      t = (t + 1) % cli_cqs_.size();
     }
   }
   virtual ~AsyncClient() {

From 014675652ca53d57a13c3ade10c3f47c15fda69e Mon Sep 17 00:00:00 2001
From: murgatroid99 <mlumish@google.com>
Date: Mon, 27 Jun 2016 15:48:08 -0700
Subject: [PATCH 237/280] Fix bug with override_server flag in
 run_interop_tests.py

---
 tools/run_tests/run_interop_tests.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/run_tests/run_interop_tests.py b/tools/run_tests/run_interop_tests.py
index d76dd4b7d26..adf9adaf136 100755
--- a/tools/run_tests/run_interop_tests.py
+++ b/tools/run_tests/run_interop_tests.py
@@ -470,7 +470,8 @@ def cloud_to_prod_jobspec(language, test_case, server_host_name,
           flake_retries=5 if args.allow_flakes else 0,
           timeout_retries=2 if args.allow_flakes else 0,
           kill_handler=_job_kill_handler)
-  test_job.container_name = container_name
+  if docker_image:
+    test_job.container_name = container_name
   return test_job
 
 
@@ -506,7 +507,8 @@ def cloud_to_cloud_jobspec(language, test_case, server_name, server_host,
           flake_retries=5 if args.allow_flakes else 0,
           timeout_retries=2 if args.allow_flakes else 0,
           kill_handler=_job_kill_handler)
-  test_job.container_name = container_name
+  if docker_image:
+    test_job.container_name = container_name
   return test_job
 
 

From ecab5e2355a42800c71487aec1686f38794546e0 Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@google.com>
Date: Mon, 27 Jun 2016 16:22:25 -0700
Subject: [PATCH 238/280] added more steps.

---
 CONTRIBUTING.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index b145dfdf9c1..56bb4b6eb98 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -54,8 +54,11 @@ To know about the list of available commands, do this:
 `./tools/run_tests/run_tests.py -h`
 
 If you are running tests for ObjC on osx, follow these steps before running tests:
+* install Xcode command-line tools by running
+`sudo xcode-select --install`
 * install macports from https://www.macports.org/install.php
 * install autoconf, automake, libtool, gflags, cmake using macports
+* restart your terminal window or run source ~/.bash_profile to pick up the new PATH changes.
 
 ## Adding or removing source code
 

From 7a3c4275dfe4b53dcd5ceb20a1a3b33e98aa24be Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@google.com>
Date: Mon, 27 Jun 2016 16:36:36 -0700
Subject: [PATCH 239/280] fixed indentation

---
 src/objective-c/ProtoRPC/ProtoService.m | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/objective-c/ProtoRPC/ProtoService.m b/src/objective-c/ProtoRPC/ProtoService.m
index 0a7f56b03f4..e5a7edfe7de 100644
--- a/src/objective-c/ProtoRPC/ProtoService.m
+++ b/src/objective-c/ProtoRPC/ProtoService.m
@@ -73,10 +73,10 @@
                                                                  service:_serviceName
                                                                   method:method];
   return [[GRPCProtoCall alloc] initWithHost:_host
-                                 method:methodName
-                         requestsWriter:requestsWriter
-                          responseClass:responseClass
-                     responsesWriteable:responsesWriteable];
+                                      method:methodName
+                              requestsWriter:requestsWriter
+                               responseClass:responseClass
+                          responsesWriteable:responsesWriteable];
 }
 @end
 

From 96e3d1c3e674d2af52206740dcb9d9f8e6b3c115 Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@google.com>
Date: Mon, 27 Jun 2016 16:45:36 -0700
Subject: [PATCH 240/280] fixed indentation #2

---
 src/objective-c/ProtoRPC/ProtoService.m | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/objective-c/ProtoRPC/ProtoService.m b/src/objective-c/ProtoRPC/ProtoService.m
index e5a7edfe7de..3487fac59d3 100644
--- a/src/objective-c/ProtoRPC/ProtoService.m
+++ b/src/objective-c/ProtoRPC/ProtoService.m
@@ -66,9 +66,9 @@
 }
 
 - (GRPCProtoCall *)RPCToMethod:(NSString *)method
-           requestsWriter:(GRXWriter *)requestsWriter
-            responseClass:(Class)responseClass
-       responsesWriteable:(id<GRXWriteable>)responsesWriteable {
+                requestsWriter:(GRXWriter *)requestsWriter
+                 responseClass:(Class)responseClass
+            responsesWriteable:(id<GRXWriteable>)responsesWriteable {
   GRPCProtoMethod *methodName = [[GRPCProtoMethod alloc] initWithPackage:_packageName
                                                                  service:_serviceName
                                                                   method:method];

From 191969937e2d4a5a4249ba3c56094673a501c6d5 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Mon, 27 Jun 2016 18:45:56 -0700
Subject: [PATCH 241/280] Dont reblock sigmask every loop

---
 src/core/lib/iomgr/ev_epoll_linux.c | 34 ++++++++++++++++++-----------
 1 file changed, 21 insertions(+), 13 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 5460d727341..099f8e85b5b 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -1031,6 +1031,8 @@ static void fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
  */
 GPR_TLS_DECL(g_current_thread_pollset);
 GPR_TLS_DECL(g_current_thread_worker);
+static __thread bool g_initialized_sigmask;
+static __thread sigset_t g_orig_sigmask;
 
 static void sig_handler(int sig_num) {
 #ifdef GRPC_EPOLL_DEBUG
@@ -1388,7 +1390,6 @@ static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   int timeout_ms = poll_deadline_to_millis_timeout(deadline, now);
 
   sigset_t new_mask;
-  sigset_t orig_mask;
 
   grpc_pollset_worker worker;
   worker.next = worker.prev = NULL;
@@ -1423,21 +1424,28 @@ static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
        times *except* when it is in epoll_pwait(). This way, the worker never
        misses acting on a kick */
 
-    sigemptyset(&new_mask);
-    sigaddset(&new_mask, grpc_wakeup_signal);
-    pthread_sigmask(SIG_BLOCK, &new_mask, &orig_mask);
-    sigdelset(&orig_mask, grpc_wakeup_signal);
-    /* new_mask:  The new thread mask which blocks 'grpc_wakeup_signal'. This is
-                  the mask used at all times *except during epoll_wait()*"
-       orig_mask: The thread mask which allows 'grpc_wakeup_signal' and this is
-                  the mask to use *during epoll_wait()*
-
-       The new_mask is set on the worker before it is added to the pollset (i.e
-       before it can be kicked) */
+    if (!g_initialized_sigmask) {
+      sigemptyset(&new_mask);
+      sigaddset(&new_mask, grpc_wakeup_signal);
+      pthread_sigmask(SIG_BLOCK, &new_mask, &g_orig_sigmask);
+      sigdelset(&g_orig_sigmask, grpc_wakeup_signal);
+      g_initialized_sigmask = true;
+      /* new_mask:       The new thread mask which blocks 'grpc_wakeup_signal'.
+                         This is the mask used at all times *except during
+                         epoll_wait()*"
+         g_orig_sigmask: The thread mask which allows 'grpc_wakeup_signal' and
+         this is
+                    the mask to use *during epoll_wait()*
+
+         The new_mask is set on the worker before it is added to the pollset
+         (i.e
+         before it can be kicked) */
+    }
 
     push_front_worker(pollset, &worker); /* Add worker to pollset */
 
-    pollset_work_and_unlock(exec_ctx, pollset, timeout_ms, &orig_mask, &error);
+    pollset_work_and_unlock(exec_ctx, pollset, timeout_ms, &g_orig_sigmask,
+                            &error);
     grpc_exec_ctx_flush(exec_ctx);
 
     gpr_mu_lock(&pollset->mu);

From 510ff69fa3dac27c71c29694020a25787eec7e03 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Mon, 27 Jun 2016 20:31:49 -0700
Subject: [PATCH 242/280] Fix comment formatting

---
 src/core/lib/iomgr/ev_epoll_linux.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 099f8e85b5b..475bd3c1dfe 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -1434,12 +1434,10 @@ static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                          This is the mask used at all times *except during
                          epoll_wait()*"
          g_orig_sigmask: The thread mask which allows 'grpc_wakeup_signal' and
-         this is
-                    the mask to use *during epoll_wait()*
+                         this is the mask to use *during epoll_wait()*
 
          The new_mask is set on the worker before it is added to the pollset
-         (i.e
-         before it can be kicked) */
+         (i.e before it can be kicked) */
     }
 
     push_front_worker(pollset, &worker); /* Add worker to pollset */

From b6960d068fe158dea537af1649b414348c3b66bc Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Mon, 27 Jun 2016 16:45:23 -0700
Subject: [PATCH 243/280] switch CoreCLR to preview2

---
 .../dockerfile/test/csharp_coreclr_x64/Dockerfile.template      | 2 +-
 tools/dockerfile/test/csharp_coreclr_x64/Dockerfile             | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/templates/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile.template b/templates/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile.template
index 35782d6665f..9bf7794247b 100644
--- a/templates/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile.template
+++ b/templates/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile.template
@@ -29,7 +29,7 @@
   # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   
-  FROM microsoft/dotnet:1.0.0-preview1
+  FROM microsoft/dotnet:1.0.0-preview2-sdk
   
   <%include file="../../apt_get_basic.include"/>
   <%include file="../../run_tests_addons.include"/>
diff --git a/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile b/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile
index 9dfc040d736..d499a708b07 100644
--- a/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile
+++ b/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile
@@ -27,7 +27,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-FROM microsoft/dotnet:1.0.0-preview1
+FROM microsoft/dotnet:1.0.0-preview2-sdk
 
 # Install Git and basic packages.
 RUN apt-get update && apt-get install -y \

From 14a301ddab0521e3f276cd309f8acf7fce526a78 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Mon, 27 Jun 2016 17:45:29 -0700
Subject: [PATCH 244/280] fix coreclr linux build

---
 tools/run_tests/run_tests.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 3798bf4e650..78539eef2d4 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -522,7 +522,7 @@ class CSharpLanguage(object):
       if self.platform == 'linux':
         assembly_subdir += '/netstandard1.5/debian.8-x64'
         assembly_extension = ''
-      if self.platform == 'mac':
+      elif self.platform == 'mac':
         assembly_subdir += '/netstandard1.5/osx.10.11-x64'
         assembly_extension = ''
       else:

From e8ab99d5e292ed7524643d61798cf7b20587457d Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Mon, 27 Jun 2016 17:46:25 -0700
Subject: [PATCH 245/280] workaround not necessary in preview2

---
 tools/run_tests/build_csharp_coreclr.sh | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/tools/run_tests/build_csharp_coreclr.sh b/tools/run_tests/build_csharp_coreclr.sh
index 68c19cb6c9d..733b1a2083c 100755
--- a/tools/run_tests/build_csharp_coreclr.sh
+++ b/tools/run_tests/build_csharp_coreclr.sh
@@ -36,7 +36,3 @@ cd $(dirname $0)/../../src/csharp
 dotnet restore .
 
 dotnet build -f netstandard1.5 --configuration $MSBUILD_CONFIG '**/project.json'
-
-# Grpc.IntegrationTesting doesn't get built by the previous command for some reason.
-# TODO(jtattermusch): get rid of the hack
-dotnet build -f netstandard1.5 --configuration $MSBUILD_CONFIG Grpc.IntegrationTesting/project.json

From ecd2b0e74c7aeecec1aac95f765edc2e4ddd6520 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Mon, 27 Jun 2016 18:07:08 -0700
Subject: [PATCH 246/280] share Version.cs among all project.json projects

---
 src/csharp/Grpc.Core/project.json                    | 1 +
 templates/src/csharp/Grpc.Core/project.json.template | 1 +
 2 files changed, 2 insertions(+)

diff --git a/src/csharp/Grpc.Core/project.json b/src/csharp/Grpc.Core/project.json
index 4729a9346cb..5443147d78d 100644
--- a/src/csharp/Grpc.Core/project.json
+++ b/src/csharp/Grpc.Core/project.json
@@ -21,6 +21,7 @@
       "build/native/bin/macosx_x64/": "../nativelibs/macosx_x64/libgrpc_csharp_ext.dylib"
     }
   },
+  "shared": "Version.cs",
   "buildOptions": {
     "embed": [ "../../../etc/roots.pem" ]
   },
diff --git a/templates/src/csharp/Grpc.Core/project.json.template b/templates/src/csharp/Grpc.Core/project.json.template
index 6f9197f572f..033efe8a2d4 100644
--- a/templates/src/csharp/Grpc.Core/project.json.template
+++ b/templates/src/csharp/Grpc.Core/project.json.template
@@ -23,6 +23,7 @@
         "build/native/bin/macosx_x64/": "../nativelibs/macosx_x64/libgrpc_csharp_ext.dylib"
       }
     },
+    "shared": "Version.cs",
     "buildOptions": {
       "embed": [ "../../../etc/roots.pem" ]
     },

From eb8bfc61e0f5ea3c911c9365fe26a89805d8f76a Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Mon, 27 Jun 2016 18:38:59 -0700
Subject: [PATCH 247/280] modify templates to sign C# coreclr projects and
 generate xmlDoc

---
 templates/src/csharp/Grpc.Auth/project.json.template      | 6 ++++++
 templates/src/csharp/Grpc.Core/project.json.template      | 6 +++++-
 .../src/csharp/Grpc.HealthCheck/project.json.template     | 6 ++++++
 templates/src/csharp/build_options.include                | 8 ++++++++
 4 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/templates/src/csharp/Grpc.Auth/project.json.template b/templates/src/csharp/Grpc.Auth/project.json.template
index 90ad0eb0891..483e34c2e81 100644
--- a/templates/src/csharp/Grpc.Auth/project.json.template
+++ b/templates/src/csharp/Grpc.Auth/project.json.template
@@ -14,6 +14,12 @@
       "requireLicenseAcceptance": false,
       "tags": [ "gRPC RPC Protocol HTTP/2 Auth OAuth2" ],
     },
+    "buildOptions": {
+      "define": [ "SIGNED" ],
+      "keyFile": "../keys/Grpc.snk",
+      "publicSign": true,
+      "xmlDoc": true
+    },
     "dependencies": {
       "Grpc.Core": "${settings.csharp_version}",
       "Google.Apis.Auth": "1.11.1"
diff --git a/templates/src/csharp/Grpc.Core/project.json.template b/templates/src/csharp/Grpc.Core/project.json.template
index 033efe8a2d4..e1c05fc8a35 100644
--- a/templates/src/csharp/Grpc.Core/project.json.template
+++ b/templates/src/csharp/Grpc.Core/project.json.template
@@ -25,7 +25,11 @@
     },
     "shared": "Version.cs",
     "buildOptions": {
-      "embed": [ "../../../etc/roots.pem" ]
+      "embed": [ "../../../etc/roots.pem" ],
+      "define": [ "SIGNED" ],
+      "keyFile": "../keys/Grpc.snk",
+      "publicSign": true,
+      "xmlDoc": true
     },
     "dependencies": {
       "Ix-Async": "1.2.5"
diff --git a/templates/src/csharp/Grpc.HealthCheck/project.json.template b/templates/src/csharp/Grpc.HealthCheck/project.json.template
index 59073af7eec..1f2cc798ba1 100644
--- a/templates/src/csharp/Grpc.HealthCheck/project.json.template
+++ b/templates/src/csharp/Grpc.HealthCheck/project.json.template
@@ -14,6 +14,12 @@
       "requireLicenseAcceptance": false,
       "tags": [ "gRPC health check" ]
     },
+    "buildOptions": {
+      "define": [ "SIGNED" ],
+      "keyFile": "../keys/Grpc.snk",
+      "publicSign": true,
+      "xmlDoc": true
+    },
     "dependencies": {
       "Grpc.Core": "${settings.csharp_version}",
       "Google.Protobuf": "3.0.0-beta3"
diff --git a/templates/src/csharp/build_options.include b/templates/src/csharp/build_options.include
index 468d281618c..0af76b81b27 100644
--- a/templates/src/csharp/build_options.include
+++ b/templates/src/csharp/build_options.include
@@ -8,6 +8,10 @@
   "configurations": {
     "Debug": {
       "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "publicSign": true,
+        "xmlDoc": true,
         "copyToOutput": {
           % if includeData:
           "include": "data/*",
@@ -23,6 +27,10 @@
     },
     "Release": {
       "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "publicSign": true,
+        "xmlDoc": true,
         "copyToOutput": {
           % if includeData:
           "include": "data/*",

From 652c00043f94e532148acf2210ad0325310ab3cb Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Mon, 27 Jun 2016 18:39:30 -0700
Subject: [PATCH 248/280] regenerate files

---
 src/csharp/Grpc.Auth/project.json                         | 6 ++++++
 src/csharp/Grpc.Core.Tests/project.json                   | 8 ++++++++
 src/csharp/Grpc.Core/project.json                         | 6 +++++-
 src/csharp/Grpc.Examples.MathClient/project.json          | 8 ++++++++
 src/csharp/Grpc.Examples.MathServer/project.json          | 8 ++++++++
 src/csharp/Grpc.Examples.Tests/project.json               | 8 ++++++++
 src/csharp/Grpc.HealthCheck.Tests/project.json            | 8 ++++++++
 src/csharp/Grpc.HealthCheck/project.json                  | 6 ++++++
 src/csharp/Grpc.IntegrationTesting.Client/project.json    | 8 ++++++++
 src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json | 8 ++++++++
 src/csharp/Grpc.IntegrationTesting.Server/project.json    | 8 ++++++++
 .../Grpc.IntegrationTesting.StressClient/project.json     | 8 ++++++++
 src/csharp/Grpc.IntegrationTesting/project.json           | 8 ++++++++
 13 files changed, 97 insertions(+), 1 deletion(-)

diff --git a/src/csharp/Grpc.Auth/project.json b/src/csharp/Grpc.Auth/project.json
index 4c5c960204e..22414133595 100644
--- a/src/csharp/Grpc.Auth/project.json
+++ b/src/csharp/Grpc.Auth/project.json
@@ -12,6 +12,12 @@
     "requireLicenseAcceptance": false,
     "tags": [ "gRPC RPC Protocol HTTP/2 Auth OAuth2" ],
   },
+  "buildOptions": {
+    "define": [ "SIGNED" ],
+    "keyFile": "../keys/Grpc.snk",
+    "publicSign": true,
+    "xmlDoc": true
+  },
   "dependencies": {
     "Grpc.Core": "0.16.0-dev",
     "Google.Apis.Auth": "1.11.1"
diff --git a/src/csharp/Grpc.Core.Tests/project.json b/src/csharp/Grpc.Core.Tests/project.json
index 3ad081df39e..6402912d05f 100644
--- a/src/csharp/Grpc.Core.Tests/project.json
+++ b/src/csharp/Grpc.Core.Tests/project.json
@@ -5,6 +5,10 @@
   "configurations": {
     "Debug": {
       "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "publicSign": true,
+        "xmlDoc": true,
         "copyToOutput": {
           "mappings": {
             "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
@@ -17,6 +21,10 @@
     },
     "Release": {
       "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "publicSign": true,
+        "xmlDoc": true,
         "copyToOutput": {
           "mappings": {
             "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
diff --git a/src/csharp/Grpc.Core/project.json b/src/csharp/Grpc.Core/project.json
index 5443147d78d..775764e1d71 100644
--- a/src/csharp/Grpc.Core/project.json
+++ b/src/csharp/Grpc.Core/project.json
@@ -23,7 +23,11 @@
   },
   "shared": "Version.cs",
   "buildOptions": {
-    "embed": [ "../../../etc/roots.pem" ]
+    "embed": [ "../../../etc/roots.pem" ],
+    "define": [ "SIGNED" ],
+    "keyFile": "../keys/Grpc.snk",
+    "publicSign": true,
+    "xmlDoc": true
   },
   "dependencies": {
     "Ix-Async": "1.2.5"
diff --git a/src/csharp/Grpc.Examples.MathClient/project.json b/src/csharp/Grpc.Examples.MathClient/project.json
index b254f15af87..378fc8cf8bf 100644
--- a/src/csharp/Grpc.Examples.MathClient/project.json
+++ b/src/csharp/Grpc.Examples.MathClient/project.json
@@ -5,6 +5,10 @@
   "configurations": {
     "Debug": {
       "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "publicSign": true,
+        "xmlDoc": true,
         "copyToOutput": {
           "mappings": {
             "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
@@ -17,6 +21,10 @@
     },
     "Release": {
       "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "publicSign": true,
+        "xmlDoc": true,
         "copyToOutput": {
           "mappings": {
             "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
diff --git a/src/csharp/Grpc.Examples.MathServer/project.json b/src/csharp/Grpc.Examples.MathServer/project.json
index b254f15af87..378fc8cf8bf 100644
--- a/src/csharp/Grpc.Examples.MathServer/project.json
+++ b/src/csharp/Grpc.Examples.MathServer/project.json
@@ -5,6 +5,10 @@
   "configurations": {
     "Debug": {
       "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "publicSign": true,
+        "xmlDoc": true,
         "copyToOutput": {
           "mappings": {
             "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
@@ -17,6 +21,10 @@
     },
     "Release": {
       "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "publicSign": true,
+        "xmlDoc": true,
         "copyToOutput": {
           "mappings": {
             "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
diff --git a/src/csharp/Grpc.Examples.Tests/project.json b/src/csharp/Grpc.Examples.Tests/project.json
index d2779e814f9..6af06454410 100644
--- a/src/csharp/Grpc.Examples.Tests/project.json
+++ b/src/csharp/Grpc.Examples.Tests/project.json
@@ -5,6 +5,10 @@
   "configurations": {
     "Debug": {
       "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "publicSign": true,
+        "xmlDoc": true,
         "copyToOutput": {
           "mappings": {
             "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
@@ -17,6 +21,10 @@
     },
     "Release": {
       "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "publicSign": true,
+        "xmlDoc": true,
         "copyToOutput": {
           "mappings": {
             "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
diff --git a/src/csharp/Grpc.HealthCheck.Tests/project.json b/src/csharp/Grpc.HealthCheck.Tests/project.json
index 74599bd4b9e..0e42fe2da63 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/project.json
+++ b/src/csharp/Grpc.HealthCheck.Tests/project.json
@@ -5,6 +5,10 @@
   "configurations": {
     "Debug": {
       "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "publicSign": true,
+        "xmlDoc": true,
         "copyToOutput": {
           "mappings": {
             "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
@@ -17,6 +21,10 @@
     },
     "Release": {
       "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "publicSign": true,
+        "xmlDoc": true,
         "copyToOutput": {
           "mappings": {
             "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
diff --git a/src/csharp/Grpc.HealthCheck/project.json b/src/csharp/Grpc.HealthCheck/project.json
index c4895c2ad3c..f2e1ce5a658 100644
--- a/src/csharp/Grpc.HealthCheck/project.json
+++ b/src/csharp/Grpc.HealthCheck/project.json
@@ -12,6 +12,12 @@
     "requireLicenseAcceptance": false,
     "tags": [ "gRPC health check" ]
   },
+  "buildOptions": {
+    "define": [ "SIGNED" ],
+    "keyFile": "../keys/Grpc.snk",
+    "publicSign": true,
+    "xmlDoc": true
+  },
   "dependencies": {
     "Grpc.Core": "0.16.0-dev",
     "Google.Protobuf": "3.0.0-beta3"
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/project.json b/src/csharp/Grpc.IntegrationTesting.Client/project.json
index e5ba04d7173..827e5a8e0fb 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Client/project.json
@@ -5,6 +5,10 @@
   "configurations": {
     "Debug": {
       "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "publicSign": true,
+        "xmlDoc": true,
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
@@ -18,6 +22,10 @@
     },
     "Release": {
       "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "publicSign": true,
+        "xmlDoc": true,
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
index e5ba04d7173..827e5a8e0fb 100644
--- a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
@@ -5,6 +5,10 @@
   "configurations": {
     "Debug": {
       "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "publicSign": true,
+        "xmlDoc": true,
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
@@ -18,6 +22,10 @@
     },
     "Release": {
       "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "publicSign": true,
+        "xmlDoc": true,
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/project.json b/src/csharp/Grpc.IntegrationTesting.Server/project.json
index e5ba04d7173..827e5a8e0fb 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Server/project.json
@@ -5,6 +5,10 @@
   "configurations": {
     "Debug": {
       "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "publicSign": true,
+        "xmlDoc": true,
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
@@ -18,6 +22,10 @@
     },
     "Release": {
       "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "publicSign": true,
+        "xmlDoc": true,
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
diff --git a/src/csharp/Grpc.IntegrationTesting.StressClient/project.json b/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
index e5ba04d7173..827e5a8e0fb 100644
--- a/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
@@ -5,6 +5,10 @@
   "configurations": {
     "Debug": {
       "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "publicSign": true,
+        "xmlDoc": true,
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
@@ -18,6 +22,10 @@
     },
     "Release": {
       "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "publicSign": true,
+        "xmlDoc": true,
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
diff --git a/src/csharp/Grpc.IntegrationTesting/project.json b/src/csharp/Grpc.IntegrationTesting/project.json
index 3493ab0c228..9a364f2ff76 100644
--- a/src/csharp/Grpc.IntegrationTesting/project.json
+++ b/src/csharp/Grpc.IntegrationTesting/project.json
@@ -5,6 +5,10 @@
   "configurations": {
     "Debug": {
       "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "publicSign": true,
+        "xmlDoc": true,
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
@@ -18,6 +22,10 @@
     },
     "Release": {
       "buildOptions": {
+        "define": [ "SIGNED" ],
+        "keyFile": "../keys/Grpc.snk",
+        "publicSign": true,
+        "xmlDoc": true,
         "copyToOutput": {
           "include": "data/*",
           "mappings": {

From 987e6f9f0e77634a1a71784120f5d5216ce21f2e Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Mon, 27 Jun 2016 23:11:51 -0700
Subject: [PATCH 249/280] Avoid using git checkout and git clean

---
 src/objective-c/tests/build_one_example.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/objective-c/tests/build_one_example.sh b/src/objective-c/tests/build_one_example.sh
index 56f686319e1..24fb8b7bab4 100755
--- a/src/objective-c/tests/build_one_example.sh
+++ b/src/objective-c/tests/build_one_example.sh
@@ -45,9 +45,9 @@ cd `dirname $0`/../../..
 cd $EXAMPLE_PATH
 
 # clean the directory
-git checkout .
-git clean -df .
 rm -rf Pods
+rm -rf $SCHEME.xcworkspace
+rm -f Podfile.lock
 
 pod install
 

From 292d0107599eff2440feb622fdbab6f9eed6c0c5 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Tue, 28 Jun 2016 10:29:41 -0700
Subject: [PATCH 250/280] give existing port_server time to respond

---
 tools/run_tests/run_tests.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 3798bf4e650..974d7a2960b 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -1055,7 +1055,7 @@ def _start_port_server(port_server_port):
   try:
     version = int(urllib2.urlopen(
         'http://localhost:%d/version_number' % port_server_port,
-        timeout=1).read())
+        timeout=10).read())
     print 'detected port server running version %d' % version
     running = True
   except Exception as e:

From 110601d8e1b225ccee3696e82ace070239ec3d5a Mon Sep 17 00:00:00 2001
From: Ken Payson <kpayson@google.com>
Date: Tue, 28 Jun 2016 11:37:27 -0700
Subject: [PATCH 251/280] Convert windows dll filename to bytes

---
 src/python/grpcio/grpc/_cython/cygrpc.pyx | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/python/grpcio/grpc/_cython/cygrpc.pyx b/src/python/grpcio/grpc/_cython/cygrpc.pyx
index c92a8d19a77..7a8d0dd8a1d 100644
--- a/src/python/grpcio/grpc/_cython/cygrpc.pyx
+++ b/src/python/grpcio/grpc/_cython/cygrpc.pyx
@@ -53,6 +53,8 @@ def _initialize():
   if 'win32' in sys.platform:
     filename = pkg_resources.resource_filename(
         'grpc._cython', '_windows/grpc_c.64.python')
+    if not isinstance(filename, bytes):
+      filename = filename.encode()
     if not pygrpc_load_core(filename):
       raise ImportError('failed to load core gRPC library')
   if not pygrpc_initialize_core():

From 431c83209a0cb16a741b712c576e33cba5cac363 Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Tue, 28 Jun 2016 12:16:34 -0700
Subject: [PATCH 252/280] Reorder the variables

---
 .travis.yml | 41 ++++++++++++++++++++++-------------------
 1 file changed, 22 insertions(+), 19 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index afc6a753de6..42fa7608a21 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,29 +6,32 @@ env:
     - TEST=objc
     - JOBS=1
   matrix:
-    - TEST_PATH="src/objective-c/tests" WORKSPACE="Tests.xcworkspace"
-      SCHEME="RxLibraryUnitTests" BUILD_ONLY="false" INTEROP_SERVER="false"
-    - TEST_PATH="src/objective-c/tests" WORKSPACE="Tests.xcworkspace"
-      SCHEME="InteropTestsLocalSSL" BUILD_ONLY="false" INTEROP_SERVER="true"
-    - TEST_PATH="src/objective-c/tests" WORKSPACE="Tests.xcworkspace"
-      SCHEME="InteropTestsLocalCleartext" BUILD_ONLY="false"
+    - SCHEME="RxLibraryUnitTests" WORKSPACE="Tests.xcworkspace"
+      TEST_PATH="src/objective-c/tests" BUILD_ONLY="false"
+      INTEROP_SERVER="false"
+    - SCHEME="InteropTestsLocalSSL" WORKSPACE="Tests.xcworkspace"
+      TEST_PATH="src/objective-c/tests" BUILD_ONLY="false" INTEROP_SERVER="true"
+    - SCHEME="InteropTestsLocalCleartext" WORKSPACE="Tests.xcworkspace"
+      TEST_PATH="src/objective-c/tests"  BUILD_ONLY="false"
       INTEROP_SERVER="true"
     # TODO(jcanizales): Investigate why they time out:
-    # - TEST_PATH="src/objective-c/tests" WORKSPACE="Tests.xcworkspace"
-    #   SCHEME="InteropTestsRemote" BUILD_ONLY=false INTEROP_SERVER=true
-    - TEST_PATH="examples/objective-c/helloworld"
-      WORKSPACE="HelloWorld.xcworkspace" SCHEME="HelloWorld" BUILD_ONLY="true"
+    # - SCHEME="InteropTestsRemote" WORKSPACE="Tests.xcworkspace"
+    #   TEST_PATH="src/objective-c/tests" BUILD_ONLY="false"
+    #   INTEROP_SERVER="true"
+    - SCHEME="HelloWorld" WORKSPACE="HelloWorld.xcworkspace"
+      TEST_PATH="examples/objective-c/helloworld" BUILD_ONLY="true"
+      INTEROP_SERVER="false"
+    - SCHEME="RouteGuideClient" WORKSPACE="RouteGuideClient.xcworkspace"
+      TEST_PATH="examples/objective-c/route_guide" BUILD_ONLY="true"
+      INTEROP_SERVER="false"
+    - SCHEME="AuthSample" WORKSPACE="AuthSample.xcworkspace"
+      TEST_PATH="examples/objective-c/auth_sample" BUILD_ONLY="true"
       INTEROP_SERVER="false"
-    - TEST_PATH="examples/objective-c/route_guide"
-      WORKSPACE="RouteGuideClient.xcworkspace" SCHEME="RouteGuideClient"
-      BUILD_ONLY="true" INTEROP_SERVER="false"
-    - TEST_PATH="examples/objective-c/auth_sample"
-      WORKSPACE="AuthSample.xcworkspace" SCHEME="AuthSample" BUILD_ONLY="true"
+    - SCHEME="Sample" WORKSPACE="Sample.xcworkspace"
+      TEST_PATH="src/objective-c/examples/Sample" BUILD_ONLY="true"
       INTEROP_SERVER="false"
-    - TEST_PATH="src/objective-c/examples/Sample" WORKSPACE="Sample.xcworkspace"
-      SCHEME="Sample" BUILD_ONLY="true" INTEROP_SERVER="false"
-    - TEST_PATH="src/objective-c/examples/SwiftSample"
-      WORKSPACE="SwiftSample.xcworkspace" SCHEME="SwiftSample" BUILD_ONLY="true"
+    - SCHEME="SwiftSample" WORKSPACE="SwiftSample.xcworkspace"
+      TEST_PATH="src/objective-c/examples/SwiftSample" BUILD_ONLY="true"
       INTEROP_SERVER="false"
 before_install:
   - pod --version

From b34608eff20e73f637eb68e8236830e3f79058ea Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Tue, 28 Jun 2016 12:22:25 -0700
Subject: [PATCH 253/280] Use 'test' instead of 'build test'

---
 .travis.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 42fa7608a21..fcdfd8b2bf9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -58,10 +58,10 @@ before_script:
 script:
   - if [ "${BUILD_ONLY}" = "true" ]; then
       xctool -workspace "$TEST_PATH/$WORKSPACE" -scheme "$SCHEME"
-      -sdk iphonesimulator9.3 clean build;
+      -sdk iphonesimulator9.3 build;
     else
       xctool -workspace "$TEST_PATH/$WORKSPACE" -scheme "$SCHEME"
-      -sdk iphonesimulator9.3 build test;
+      -sdk iphonesimulator9.3 test;
     fi
 notifications:
   email: false

From d99a925d52b9b56306c245b3e4d43e7a737dfe35 Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@google.com>
Date: Tue, 28 Jun 2016 13:06:43 -0700
Subject: [PATCH 254/280] fix for working with compressed data. Fixes #6746.

Using correct API that gives length of uncompressed data so correct amount of memory is allocated.
---
 .../GRPCClient/private/NSData+GRPC.m          | 30 +++++++++++--------
 1 file changed, 17 insertions(+), 13 deletions(-)

diff --git a/src/objective-c/GRPCClient/private/NSData+GRPC.m b/src/objective-c/GRPCClient/private/NSData+GRPC.m
index e6a6c3c605a..6b635a6649b 100644
--- a/src/objective-c/GRPCClient/private/NSData+GRPC.m
+++ b/src/objective-c/GRPCClient/private/NSData+GRPC.m
@@ -39,17 +39,19 @@
 
 // TODO(jcanizales): Move these two incantations to the C library.
 
-static void CopyByteBufferToCharArray(grpc_byte_buffer *buffer, char *array) {
-  size_t offset = 0;
+static void MallocAndCopyByteBufferToCharArray(grpc_byte_buffer *buffer,
+                                               size_t *length, char **array) {
   grpc_byte_buffer_reader reader;
   grpc_byte_buffer_reader_init(&reader, buffer);
-  gpr_slice next;
-  while (grpc_byte_buffer_reader_next(&reader, &next) != 0){
-    memcpy(array + offset, GPR_SLICE_START_PTR(next),
-           (size_t)GPR_SLICE_LENGTH(next));
-    offset += GPR_SLICE_LENGTH(next);
-    gpr_slice_unref(next);
+  gpr_slice slice = grpc_byte_buffer_reader_readall(&reader);
+  size_t uncompressed_length = GPR_SLICE_LENGTH(slice);
+  char *result = malloc(uncompressed_length);
+  if (result) {
+    memcpy(result, GPR_SLICE_START_PTR(slice), uncompressed_length);
   }
+  gpr_slice_unref(slice);
+  *array = result;
+  *length = uncompressed_length;
 }
 
 static grpc_byte_buffer *CopyCharArrayToNewByteBuffer(const char *array,
@@ -65,8 +67,9 @@ static grpc_byte_buffer *CopyCharArrayToNewByteBuffer(const char *array,
   if (buffer == NULL) {
     return nil;
   }
-  NSUInteger length = grpc_byte_buffer_length(buffer);
-  char *array = malloc(length * sizeof(*array));
+  char *array;
+  NSUInteger length;
+  MallocAndCopyByteBufferToCharArray(buffer, &length, &array);
   if (!array) {
     // TODO(jcanizales): grpc_byte_buffer is reference-counted, so we can
     // prevent this memory problem by implementing a subclass of NSData
@@ -74,7 +77,6 @@ static grpc_byte_buffer *CopyCharArrayToNewByteBuffer(const char *array,
     // can be implemented using a grpc_byte_buffer_reader.
     return nil;
   }
-  CopyByteBufferToCharArray(buffer, array);
   return [self dataWithBytesNoCopy:array length:length freeWhenDone:YES];
 }
 
@@ -85,8 +87,10 @@ static grpc_byte_buffer *CopyCharArrayToNewByteBuffer(const char *array,
   // The following implementation is thus not optimal, sometimes requiring two
   // copies (one by self.bytes and another by gpr_slice_from_copied_buffer).
   // If it turns out to be an issue, we can use enumerateByteRangesUsingblock:
-  // to create an array of gpr_slice objects to pass to grpc_raw_byte_buffer_create.
+  // to create an array of gpr_slice objects to pass to
+  // grpc_raw_byte_buffer_create.
   // That would make it do exactly one copy, always.
-  return CopyCharArrayToNewByteBuffer((const char *)self.bytes, (size_t)self.length);
+  return CopyCharArrayToNewByteBuffer((const char *)self.bytes,
+                                      (size_t)self.length);
 }
 @end

From 5aada71fbfe7f1fe73078c115882a8cf5f856c6e Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@google.com>
Date: Tue, 28 Jun 2016 13:41:51 -0700
Subject: [PATCH 255/280] Added a comment

---
 src/objective-c/GRPCClient/private/NSData+GRPC.m | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/objective-c/GRPCClient/private/NSData+GRPC.m b/src/objective-c/GRPCClient/private/NSData+GRPC.m
index 6b635a6649b..5dfa2695536 100644
--- a/src/objective-c/GRPCClient/private/NSData+GRPC.m
+++ b/src/objective-c/GRPCClient/private/NSData+GRPC.m
@@ -43,6 +43,7 @@ static void MallocAndCopyByteBufferToCharArray(grpc_byte_buffer *buffer,
                                                size_t *length, char **array) {
   grpc_byte_buffer_reader reader;
   grpc_byte_buffer_reader_init(&reader, buffer);
+  // The slice contains uncompressed data even if compressed data was received
   gpr_slice slice = grpc_byte_buffer_reader_readall(&reader);
   size_t uncompressed_length = GPR_SLICE_LENGTH(slice);
   char *result = malloc(uncompressed_length);

From 1e77668c6dc5940c29b434fac78dc1dee4d12fe1 Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Tue, 28 Jun 2016 14:09:26 -0700
Subject: [PATCH 256/280] Trace statements in epoll poller (enabled by default
 to debug the recent perf regression)

---
 src/core/lib/iomgr/ev_epoll_linux.c | 48 ++++++++++++++++++++++++++---
 1 file changed, 44 insertions(+), 4 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index 475bd3c1dfe..e41bf5029c9 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -60,6 +60,14 @@
 #include "src/core/lib/profiling/timers.h"
 #include "src/core/lib/support/block_annotate.h"
 
+/* TODO: sreek - Move this to init.c and initialize this like other tracers.
+ * Also, enable this trace by default for now. */
+static int grpc_polling_trace = 1;
+#define GRPC_POLLING_TRACE(fmt, ...)       \
+  if (grpc_polling_trace) {                \
+    gpr_log(GPR_INFO, (fmt), __VA_ARGS__); \
+  }
+
 static int grpc_wakeup_signal = -1;
 static bool is_grpc_wakeup_signal_initialized = false;
 
@@ -1058,6 +1066,8 @@ static void pollset_global_shutdown(void) {
 
 static grpc_error *pollset_worker_kick(grpc_pollset_worker *worker) {
   grpc_error *err = GRPC_ERROR_NONE;
+  GRPC_POLLING_TRACE("pollset_worker_kick: Kicking worker: %p (thread id: %ld)",
+                     (void *)worker, worker->pt_id);
   int err_num = pthread_kill(worker->pt_id, grpc_wakeup_signal);
   if (err_num != 0) {
     err = GRPC_OS_ERROR(err_num, "pthread_kill");
@@ -1104,7 +1114,6 @@ static grpc_error *pollset_kick(grpc_pollset *p,
   GPR_TIMER_BEGIN("pollset_kick", 0);
   grpc_error *error = GRPC_ERROR_NONE;
   const char *err_desc = "Kick Failure";
-
   grpc_pollset_worker *worker = specific_worker;
   if (worker != NULL) {
     if (worker == GRPC_POLLSET_KICK_BROADCAST) {
@@ -1270,7 +1279,8 @@ static void pollset_reset(grpc_pollset *pollset) {
 #define GRPC_EPOLL_MAX_EVENTS 1000
 /* Note: sig_mask contains the signal mask to use *during* epoll_wait() */
 static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
-                                    grpc_pollset *pollset, int timeout_ms,
+                                    grpc_pollset *pollset,
+                                    grpc_pollset_worker *worker, int timeout_ms,
                                     sigset_t *sig_mask, grpc_error **error) {
   struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS];
   int epoll_fd = -1;
@@ -1298,6 +1308,8 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
     }
 
     PI_ADD_REF(pollset->polling_island, "ps");
+    GRPC_POLLING_TRACE("pollset_work: pollset: %p created new pi: %p",
+                       (void *)pollset, (void *)pollset->polling_island);
   }
 
   pi = polling_island_maybe_get_latest(pollset->polling_island);
@@ -1331,6 +1343,9 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
       } else {
         /* We were interrupted. Save an interation by doing a zero timeout
            epoll_wait to see if there are any other events of interest */
+        GRPC_POLLING_TRACE(
+            "pollset_work: pollset: %p, worker: %p received kick",
+            (void *)pollset, (void *)worker);
         ep_rv = epoll_wait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, 0);
       }
     }
@@ -1347,6 +1362,10 @@ static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx,
                      grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd),
                      err_desc);
       } else if (data_ptr == &polling_island_wakeup_fd) {
+        GRPC_POLLING_TRACE(
+            "pollset_work: pollset: %p, worker: %p polling island (epoll_fd: "
+            "%d) got merged",
+            (void *)pollset, (void *)worker, epoll_fd);
         /* This means that our polling island is merged with a different
            island. We do not have to do anything here since the subsequent call
            to the function pollset_work_and_unlock() will pick up the correct
@@ -1442,8 +1461,8 @@ static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 
     push_front_worker(pollset, &worker); /* Add worker to pollset */
 
-    pollset_work_and_unlock(exec_ctx, pollset, timeout_ms, &g_orig_sigmask,
-                            &error);
+    pollset_work_and_unlock(exec_ctx, pollset, &worker, timeout_ms,
+                            &g_orig_sigmask, &error);
     grpc_exec_ctx_flush(exec_ctx);
 
     gpr_mu_lock(&pollset->mu);
@@ -1506,17 +1525,38 @@ static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
     pi_new = fd->polling_island;
     if (pi_new == NULL) {
       pi_new = polling_island_create(fd, &error);
+
+      GRPC_POLLING_TRACE(
+          "pollset_add_fd: Created new polling island. pi_new:%p (fd: %d, "
+          "pollset: %p)",
+          (void *)pi_new, fd->fd, (void *)pollset);
     }
   } else if (fd->polling_island == NULL) {
     pi_new = polling_island_lock(pollset->polling_island);
     polling_island_add_fds_locked(pi_new, &fd, 1, true, &error);
     gpr_mu_unlock(&pi_new->mu);
+
+    GRPC_POLLING_TRACE(
+        "pollset_add_fd: fd->pi was NULL. pi_new: %p (fd: %d, pollset: %p, "
+        "pollset->pi: %p)",
+        (void *)pi_new, fd->fd, (void *)pollset,
+        (void *)pollset->polling_island);
   } else if (pollset->polling_island == NULL) {
     pi_new = polling_island_lock(fd->polling_island);
     gpr_mu_unlock(&pi_new->mu);
+
+    GRPC_POLLING_TRACE(
+        "pollset_add_fd: pollset->pi was NULL. pi_new: %p (fd: %d, pollset: "
+        "%p, fd->pi: %p",
+        (void *)pi_new, fd->fd, (void *)pollset, (void *)fd->polling_island);
   } else {
     pi_new = polling_island_merge(fd->polling_island, pollset->polling_island,
                                   &error);
+    GRPC_POLLING_TRACE(
+        "pollset_add_fd: polling islands merged. pi_new: %p (fd: %d, pollset: "
+        "%p, fd->pi: %p, pollset->pi: %p)",
+        (void *)pi_new, fd->fd, (void *)pollset, (void *)fd->polling_island,
+        (void *)pollset->polling_island);
   }
 
   /* At this point, pi_new is the polling island that both fd->polling_island

From 0475549e8ae53e4dbc3193feb3b2c0221f4c7fec Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@google.com>
Date: Tue, 28 Jun 2016 14:15:51 -0700
Subject: [PATCH 257/280] Added another comment

---
 src/objective-c/GRPCClient/private/NSData+GRPC.m | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/objective-c/GRPCClient/private/NSData+GRPC.m b/src/objective-c/GRPCClient/private/NSData+GRPC.m
index 5dfa2695536..741b70b5750 100644
--- a/src/objective-c/GRPCClient/private/NSData+GRPC.m
+++ b/src/objective-c/GRPCClient/private/NSData+GRPC.m
@@ -44,6 +44,7 @@ static void MallocAndCopyByteBufferToCharArray(grpc_byte_buffer *buffer,
   grpc_byte_buffer_reader reader;
   grpc_byte_buffer_reader_init(&reader, buffer);
   // The slice contains uncompressed data even if compressed data was received
+  // because the reader takes care of automatically decompressing it
   gpr_slice slice = grpc_byte_buffer_reader_readall(&reader);
   size_t uncompressed_length = GPR_SLICE_LENGTH(slice);
   char *result = malloc(uncompressed_length);

From eac6243d678719ce528fd21928ea98c9f7babb8f Mon Sep 17 00:00:00 2001
From: murgatroid99 <mlumish@google.com>
Date: Tue, 28 Jun 2016 14:22:21 -0700
Subject: [PATCH 258/280] Re-enable two Node credentials tests

---
 src/node/test/credentials_test.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/node/test/credentials_test.js b/src/node/test/credentials_test.js
index 794215b246c..0a21572582e 100644
--- a/src/node/test/credentials_test.js
+++ b/src/node/test/credentials_test.js
@@ -318,7 +318,7 @@ describe('client credentials', function() {
       done();
     });
   });
-  it.skip('should propagate errors that the updater emits', function(done) {
+  it('should propagate errors that the updater emits', function(done) {
     var metadataUpdater = function(service_url, callback) {
       var error = new Error('Authentication error');
       error.code = grpc.status.UNAUTHENTICATED;
@@ -370,7 +370,7 @@ describe('client credentials', function() {
       done();
     });
   });
-  it.skip('should get an error from a Google credential', function(done) {
+  it('should get an error from a Google credential', function(done) {
     var creds = grpc.credentials.createFromGoogleCredential(
         fakeFailingGoogleCredentials);
     var combined_creds = grpc.credentials.combineChannelCredentials(

From 4ea77849f2507a2a7470b6a55af5a248202ae3e8 Mon Sep 17 00:00:00 2001
From: Ken Payson <kpayson@google.com>
Date: Mon, 27 Jun 2016 13:30:58 -0700
Subject: [PATCH 259/280] Removed _connectivity_channel.ChannelConnectivityTest
 test

---
 src/python/grpcio/tests/tests.json            |   1 -
 .../unit/beta/_connectivity_channel_test.py   | 153 ------------------
 2 files changed, 154 deletions(-)

diff --git a/src/python/grpcio/tests/tests.json b/src/python/grpcio/tests/tests.json
index 9c118ef6016..45eb75b242c 100644
--- a/src/python/grpcio/tests/tests.json
+++ b/src/python/grpcio/tests/tests.json
@@ -11,7 +11,6 @@
   "_channel_ready_future_test.ChannelReadyFutureTest",
   "_channel_test.ChannelTest", 
   "_compression_test.CompressionTest",
-  "_connectivity_channel_test.ChannelConnectivityTest", 
   "_connectivity_channel_test.ConnectivityStatesTest",
   "_empty_message_test.EmptyMessageTest",
   "_exit_test.ExitTest",
diff --git a/src/python/grpcio/tests/unit/beta/_connectivity_channel_test.py b/src/python/grpcio/tests/unit/beta/_connectivity_channel_test.py
index 488f7d7141b..5d826a269db 100644
--- a/src/python/grpcio/tests/unit/beta/_connectivity_channel_test.py
+++ b/src/python/grpcio/tests/unit/beta/_connectivity_channel_test.py
@@ -29,162 +29,9 @@
 
 """Tests of grpc.beta._connectivity_channel."""
 
-import threading
-import time
 import unittest
 
-from grpc._adapter import _low
-from grpc._adapter import _types
-from grpc.beta import _connectivity_channel
 from grpc.beta import interfaces
-from tests.unit.framework.common import test_constants
-
-
-def _drive_completion_queue(completion_queue):
-  while True:
-    event = completion_queue.next(time.time() + 24 * 60 * 60)
-    if event.type == _types.EventType.QUEUE_SHUTDOWN:
-      break
-
-
-class _Callback(object):
-
-  def __init__(self):
-    self._condition = threading.Condition()
-    self._connectivities = []
-
-  def update(self, connectivity):
-    with self._condition:
-      self._connectivities.append(connectivity)
-      self._condition.notify()
-
-  def connectivities(self):
-    with self._condition:
-      return tuple(self._connectivities)
-
-  def block_until_connectivities_satisfy(self, predicate):
-    with self._condition:
-      while True:
-        connectivities = tuple(self._connectivities)
-        if predicate(connectivities):
-          return connectivities
-        else:
-          self._condition.wait()
-
-
-class ChannelConnectivityTest(unittest.TestCase):
-
-  def test_lonely_channel_connectivity(self):
-    low_channel = _low.Channel('localhost:12345', ())
-    callback = _Callback()
-
-    connectivity_channel = _connectivity_channel.ConnectivityChannel(
-        low_channel)
-    connectivity_channel.subscribe(callback.update, try_to_connect=False)
-    first_connectivities = callback.block_until_connectivities_satisfy(bool)
-    connectivity_channel.subscribe(callback.update, try_to_connect=True)
-    second_connectivities = callback.block_until_connectivities_satisfy(
-        lambda connectivities: 2 <= len(connectivities))
-    # Wait for a connection that will never happen.
-    time.sleep(test_constants.SHORT_TIMEOUT)
-    third_connectivities = callback.connectivities()
-    connectivity_channel.unsubscribe(callback.update)
-    fourth_connectivities = callback.connectivities()
-    connectivity_channel.unsubscribe(callback.update)
-    fifth_connectivities = callback.connectivities()
-
-    self.assertSequenceEqual(
-        (interfaces.ChannelConnectivity.IDLE,), first_connectivities)
-    self.assertNotIn(
-        interfaces.ChannelConnectivity.READY, second_connectivities)
-    self.assertNotIn(
-        interfaces.ChannelConnectivity.READY, third_connectivities)
-    self.assertNotIn(
-        interfaces.ChannelConnectivity.READY, fourth_connectivities)
-    self.assertNotIn(
-        interfaces.ChannelConnectivity.READY, fifth_connectivities)
-
-  def test_immediately_connectable_channel_connectivity(self):
-    server_completion_queue = _low.CompletionQueue()
-    server = _low.Server(server_completion_queue, [])
-    port = server.add_http2_port('[::]:0')
-    server.start()
-    server_completion_queue_thread = threading.Thread(
-        target=_drive_completion_queue, args=(server_completion_queue,))
-    server_completion_queue_thread.start()
-    low_channel = _low.Channel('localhost:%d' % port, ())
-    first_callback = _Callback()
-    second_callback = _Callback()
-
-    connectivity_channel = _connectivity_channel.ConnectivityChannel(
-        low_channel)
-    connectivity_channel.subscribe(first_callback.update, try_to_connect=False)
-    first_connectivities = first_callback.block_until_connectivities_satisfy(
-        bool)
-    # Wait for a connection that will never happen because try_to_connect=True
-    # has not yet been passed.
-    time.sleep(test_constants.SHORT_TIMEOUT)
-    second_connectivities = first_callback.connectivities()
-    connectivity_channel.subscribe(second_callback.update, try_to_connect=True)
-    third_connectivities = first_callback.block_until_connectivities_satisfy(
-        lambda connectivities: 2 <= len(connectivities))
-    fourth_connectivities = second_callback.block_until_connectivities_satisfy(
-        bool)
-    # Wait for a connection that will happen (or may already have happened).
-    first_callback.block_until_connectivities_satisfy(
-        lambda connectivities:
-        interfaces.ChannelConnectivity.READY in connectivities)
-    second_callback.block_until_connectivities_satisfy(
-        lambda connectivities:
-        interfaces.ChannelConnectivity.READY in connectivities)
-    connectivity_channel.unsubscribe(first_callback.update)
-    connectivity_channel.unsubscribe(second_callback.update)
-
-    server.shutdown()
-    server_completion_queue.shutdown()
-    server_completion_queue_thread.join()
-
-    self.assertSequenceEqual(
-        (interfaces.ChannelConnectivity.IDLE,), first_connectivities)
-    self.assertSequenceEqual(
-        (interfaces.ChannelConnectivity.IDLE,), second_connectivities)
-    self.assertNotIn(
-        interfaces.ChannelConnectivity.TRANSIENT_FAILURE, third_connectivities)
-    self.assertNotIn(
-        interfaces.ChannelConnectivity.FATAL_FAILURE, third_connectivities)
-    self.assertNotIn(
-        interfaces.ChannelConnectivity.TRANSIENT_FAILURE,
-        fourth_connectivities)
-    self.assertNotIn(
-        interfaces.ChannelConnectivity.FATAL_FAILURE, fourth_connectivities)
-
-  def test_reachable_then_unreachable_channel_connectivity(self):
-    server_completion_queue = _low.CompletionQueue()
-    server = _low.Server(server_completion_queue, [])
-    port = server.add_http2_port('[::]:0')
-    server.start()
-    server_completion_queue_thread = threading.Thread(
-        target=_drive_completion_queue, args=(server_completion_queue,))
-    server_completion_queue_thread.start()
-    low_channel = _low.Channel('localhost:%d' % port, ())
-    callback = _Callback()
-
-    connectivity_channel = _connectivity_channel.ConnectivityChannel(
-        low_channel)
-    connectivity_channel.subscribe(callback.update, try_to_connect=True)
-    callback.block_until_connectivities_satisfy(
-        lambda connectivities:
-        interfaces.ChannelConnectivity.READY in connectivities)
-    # Now take down the server and confirm that channel readiness is repudiated.
-    server.shutdown()
-    callback.block_until_connectivities_satisfy(
-        lambda connectivities:
-        connectivities[-1] is not interfaces.ChannelConnectivity.READY)
-    connectivity_channel.unsubscribe(callback.update)
-
-    server.shutdown()
-    server_completion_queue.shutdown()
-    server_completion_queue_thread.join()
 
 
 class ConnectivityStatesTest(unittest.TestCase):

From 2b7fae0432575931f99e5774b3495b77d2537732 Mon Sep 17 00:00:00 2001
From: Ken Payson <kpayson@google.com>
Date: Tue, 28 Jun 2016 17:20:37 -0700
Subject: [PATCH 260/280] Lowered six dependency version to 1.5.2

---
 setup.py | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/setup.py b/setup.py
index 7e625b937a7..c1341187cad 100644
--- a/setup.py
+++ b/setup.py
@@ -167,7 +167,7 @@ PACKAGE_DIRECTORIES = {
 }
 
 INSTALL_REQUIRES = (
-    'six>=1.10',
+    'six>=1.5.2',
     'enum34>=1.0.4',
     'futures>=2.2.0',
     # TODO(atash): eventually split the grpcio package into a metapackage
@@ -175,10 +175,11 @@ INSTALL_REQUIRES = (
     'protobuf>=3.0.0a3',
 )
 
-SETUP_REQUIRES = (
+SETUP_REQUIRES = INSTALL_REQUIRES + (
     'sphinx>=1.3',
-    'sphinx_rtd_theme>=0.1.8'
-) + INSTALL_REQUIRES
+    'sphinx_rtd_theme>=0.1.8',
+    'six>=1.10',
+)
 
 COMMAND_CLASS = {
     'doc': commands.SphinxDocumentation,

From 9de42abd120f44aaa3f25651ba388f3fe3c9c84c Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Tue, 28 Jun 2016 17:41:21 -0700
Subject: [PATCH 261/280] Minor format fix

---
 src/core/lib/iomgr/ev_epoll_linux.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index e41bf5029c9..e3304b75a3b 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -1527,7 +1527,7 @@ static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
       pi_new = polling_island_create(fd, &error);
 
       GRPC_POLLING_TRACE(
-          "pollset_add_fd: Created new polling island. pi_new:%p (fd: %d, "
+          "pollset_add_fd: Created new polling island. pi_new: %p (fd: %d, "
           "pollset: %p)",
           (void *)pi_new, fd->fd, (void *)pollset);
     }

From 34217248cffed13526a7b2f5f0554a189e3b59cb Mon Sep 17 00:00:00 2001
From: Sree Kuchibhotla <sreek@google.com>
Date: Wed, 29 Jun 2016 00:19:07 -0700
Subject: [PATCH 262/280] Reduce the number of kicks

---
 src/core/lib/iomgr/ev_epoll_linux.c | 56 ++++++++++++++++++-----------
 1 file changed, 35 insertions(+), 21 deletions(-)

diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index e3304b75a3b..cf0fe736a0b 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -60,9 +60,8 @@
 #include "src/core/lib/profiling/timers.h"
 #include "src/core/lib/support/block_annotate.h"
 
-/* TODO: sreek - Move this to init.c and initialize this like other tracers.
- * Also, enable this trace by default for now. */
-static int grpc_polling_trace = 1;
+/* TODO: sreek - Move this to init.c and initialize this like other tracers. */
+static int grpc_polling_trace = 0; /* Disabled by default */
 #define GRPC_POLLING_TRACE(fmt, ...)       \
   if (grpc_polling_trace) {                \
     gpr_log(GPR_INFO, (fmt), __VA_ARGS__); \
@@ -203,7 +202,11 @@ typedef struct polling_island {
  * Pollset Declarations
  */
 struct grpc_pollset_worker {
-  pthread_t pt_id; /* Thread id of this worker */
+  /* Thread id of this worker */
+  pthread_t pt_id;
+
+  /* Used to prevent a worker from getting kicked multiple times */
+  gpr_atm is_kicked;
   struct grpc_pollset_worker *next;
   struct grpc_pollset_worker *prev;
 };
@@ -1066,11 +1069,16 @@ static void pollset_global_shutdown(void) {
 
 static grpc_error *pollset_worker_kick(grpc_pollset_worker *worker) {
   grpc_error *err = GRPC_ERROR_NONE;
-  GRPC_POLLING_TRACE("pollset_worker_kick: Kicking worker: %p (thread id: %ld)",
-                     (void *)worker, worker->pt_id);
-  int err_num = pthread_kill(worker->pt_id, grpc_wakeup_signal);
-  if (err_num != 0) {
-    err = GRPC_OS_ERROR(err_num, "pthread_kill");
+
+  /* Kick the worker only if it was not already kicked */
+  if (gpr_atm_no_barrier_cas(&worker->is_kicked, (gpr_atm)0, (gpr_atm)1)) {
+    GRPC_POLLING_TRACE(
+        "pollset_worker_kick: Kicking worker: %p (thread id: %ld)",
+        (void *)worker, worker->pt_id);
+    int err_num = pthread_kill(worker->pt_id, grpc_wakeup_signal);
+    if (err_num != 0) {
+      err = GRPC_OS_ERROR(err_num, "pthread_kill");
+    }
   }
   return err;
 }
@@ -1413,6 +1421,7 @@ static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   grpc_pollset_worker worker;
   worker.next = worker.prev = NULL;
   worker.pt_id = pthread_self();
+  gpr_atm_no_barrier_store(&worker.is_kicked, (gpr_atm)0);
 
   *worker_hdl = &worker;
 
@@ -1428,18 +1437,20 @@ static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
     pollset->kicked_without_pollers = 0;
   } else if (!pollset->shutting_down) {
     /* We use the posix-signal with number 'grpc_wakeup_signal' for waking up
-       (i.e 'kicking') a worker in the pollset.
-       A 'kick' is a way to inform that worker that there is some pending work
-       that needs immediate attention (like an event on the completion queue,
-       or a polling island merge that results in a new epoll-fd to wait on) and
-       that the worker should not spend time waiting in epoll_pwait().
-
-       A kick can come at anytime (i.e before/during or after the worker calls
-       epoll_pwait()) but in all cases we have to make sure that when a worker
-       gets a kick, it does not spend time in epoll_pwait(). In other words, one
-       kick should result in skipping/exiting of one epoll_pwait();
-
-       To accomplish this, we mask 'grpc_wakeup_signal' on this worker at all
+       (i.e 'kicking') a worker in the pollset. A 'kick' is a way to inform the
+       worker that there is some pending work that needs immediate attention
+       (like an event on the completion queue, or a polling island merge that
+       results in a new epoll-fd to wait on) and that the worker should not
+       spend time waiting in epoll_pwait().
+
+       A worker can be kicked anytime from the point it is added to the pollset
+       via push_front_worker() (or push_back_worker()) to the point it is
+       removed via remove_worker().
+       If the worker is kicked before/during it calls epoll_pwait(), it should
+       immediately exit from epoll_wait(). If the worker is kicked after it
+       returns from epoll_wait(), then nothing really needs to be done.
+
+       To accomplish this, we mask 'grpc_wakeup_signal' on this thread at all
        times *except* when it is in epoll_pwait(). This way, the worker never
        misses acting on a kick */
 
@@ -1466,6 +1477,9 @@ static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
     grpc_exec_ctx_flush(exec_ctx);
 
     gpr_mu_lock(&pollset->mu);
+
+    /* Note: There is no need to reset worker.is_kicked to 0 since we are no
+       longer going to use this worker */
     remove_worker(pollset, &worker);
   }
 

From c66ac4f8da99e0dc1c08a3d6396575210f85c828 Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@google.com>
Date: Wed, 29 Jun 2016 09:34:58 -0700
Subject: [PATCH 263/280] fixed a compiler warning

---
 src/objective-c/GRPCClient/private/NSData+GRPC.m | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/objective-c/GRPCClient/private/NSData+GRPC.m b/src/objective-c/GRPCClient/private/NSData+GRPC.m
index 741b70b5750..6487bcb5895 100644
--- a/src/objective-c/GRPCClient/private/NSData+GRPC.m
+++ b/src/objective-c/GRPCClient/private/NSData+GRPC.m
@@ -71,7 +71,7 @@ static grpc_byte_buffer *CopyCharArrayToNewByteBuffer(const char *array,
   }
   char *array;
   NSUInteger length;
-  MallocAndCopyByteBufferToCharArray(buffer, &length, &array);
+  MallocAndCopyByteBufferToCharArray(buffer, (size_t *)&length, &array);
   if (!array) {
     // TODO(jcanizales): grpc_byte_buffer is reference-counted, so we can
     // prevent this memory problem by implementing a subclass of NSData

From 2c084ee31e77c8cdd4edb881f645fcac2bc02469 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Tue, 28 Jun 2016 16:54:17 -0700
Subject: [PATCH 264/280] build experimental nugets with dotnet CLI

---
 .../csharp_coreclr_x64/Dockerfile.template    | 18 +++++-
 .../test/csharp_coreclr_x64/Dockerfile        | 34 ++++++++++-
 .../run_tests/build_package_csharp_coreclr.sh | 59 +++++++++++++++++++
 tools/run_tests/package_targets.py            | 26 +++++---
 4 files changed, 128 insertions(+), 9 deletions(-)
 create mode 100755 tools/run_tests/build_package_csharp_coreclr.sh

diff --git a/templates/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile.template b/templates/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile.template
index 9bf7794247b..e9cab570194 100644
--- a/templates/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile.template
+++ b/templates/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile.template
@@ -29,9 +29,25 @@
   # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   
-  FROM microsoft/dotnet:1.0.0-preview2-sdk
+  FROM debian:jessie
   
   <%include file="../../apt_get_basic.include"/>
+  <%include file="../../csharp_deps.include"/>
+  
+  # Install dotnet SDK based on https://www.microsoft.com/net/core#debian
+  RUN apt-get update && apt-get install -y curl libunwind8 gettext
+  RUN curl -sSL -o dotnet.tar.gz https://go.microsoft.com/fwlink/?LinkID=809130
+  RUN mkdir -p /opt/dotnet && tar zxf dotnet.tar.gz -C /opt/dotnet
+  RUN ln -s /opt/dotnet/dotnet /usr/local/bin
+  
+  # Trigger the population of the local package cache
+  ENV NUGET_XMLDOC_MODE skip
+  RUN mkdir warmup ${'\\'}
+      && cd warmup ${'\\'}
+      && dotnet new ${'\\'}
+      && cd .. ${'\\'}
+      && rm -rf warmup
+  
   <%include file="../../run_tests_addons.include"/>
   # Define the default command.
   CMD ["bash"]
diff --git a/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile b/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile
index d499a708b07..fd7215716d3 100644
--- a/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile
+++ b/tools/dockerfile/test/csharp_coreclr_x64/Dockerfile
@@ -27,7 +27,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-FROM microsoft/dotnet:1.0.0-preview2-sdk
+FROM debian:jessie
 
 # Install Git and basic packages.
 RUN apt-get update && apt-get install -y \
@@ -63,6 +63,38 @@ RUN apt-get update && apt-get install -y \
 # Build profiling
 RUN apt-get update && apt-get install -y time && apt-get clean
 
+#================
+# C# dependencies
+
+# Update to a newer version of mono
+RUN apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
+RUN echo "deb http://download.mono-project.com/repo/debian wheezy main" | tee /etc/apt/sources.list.d/mono-xamarin.list
+RUN echo "deb http://download.mono-project.com/repo/debian wheezy-apache24-compat main" | tee -a /etc/apt/sources.list.d/mono-xamarin.list
+RUN echo "deb http://download.mono-project.com/repo/debian wheezy-libjpeg62-compat main" | tee -a /etc/apt/sources.list.d/mono-xamarin.list
+RUN echo "deb http://download.mono-project.com/repo/debian wheezy-libtiff-compat main" | tee -a /etc/apt/sources.list.d/mono-xamarin.list
+
+# Install dependencies
+RUN apt-get update && apt-get -y dist-upgrade && apt-get install -y \
+    mono-devel \
+    ca-certificates-mono \
+    nuget \
+    && apt-get clean
+
+
+# Install dotnet SDK based on https://www.microsoft.com/net/core#debian
+RUN apt-get update && apt-get install -y curl libunwind8 gettext
+RUN curl -sSL -o dotnet.tar.gz https://go.microsoft.com/fwlink/?LinkID=809130
+RUN mkdir -p /opt/dotnet && tar zxf dotnet.tar.gz -C /opt/dotnet
+RUN ln -s /opt/dotnet/dotnet /usr/local/bin
+
+# Trigger the population of the local package cache
+ENV NUGET_XMLDOC_MODE skip
+RUN mkdir warmup \
+    && cd warmup \
+    && dotnet new \
+    && cd .. \
+    && rm -rf warmup
+
 # Prepare ccache
 RUN ln -s /usr/bin/ccache /usr/local/bin/gcc
 RUN ln -s /usr/bin/ccache /usr/local/bin/g++
diff --git a/tools/run_tests/build_package_csharp_coreclr.sh b/tools/run_tests/build_package_csharp_coreclr.sh
new file mode 100755
index 00000000000..e1c363da50b
--- /dev/null
+++ b/tools/run_tests/build_package_csharp_coreclr.sh
@@ -0,0 +1,59 @@
+#!/bin/bash
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+set -ex
+
+cd $(dirname $0)/../..
+
+mkdir -p artifacts/
+
+cd src/csharp
+
+# IMPORTANT: NuGet packages generated by dotnet CLI are considered experimental.
+# The official nugets are generated by src/csharp/build_packages.bat
+
+mkdir -p nativelibs/windows_x86 nativelibs/windows_x64 \
+    nativelibs/linux_x86 nativelibs/linux_x64 \
+    nativelibs/macosx_x86 nativelibs/macosx_x64
+
+cp $EXTERNAL_GIT_ROOT/architecture=x86,language=csharp,platform=windows/artifacts/* nativelibs/windows_x86 || true
+cp $EXTERNAL_GIT_ROOT/architecture=x64,language=csharp,platform=windows/artifacts/* nativelibs/windows_x64 || true
+cp $EXTERNAL_GIT_ROOT/architecture=x86,language=csharp,platform=linux/artifacts/* nativelibs/linux_x86 || true
+cp $EXTERNAL_GIT_ROOT/architecture=x64,language=csharp,platform=linux/artifacts/* nativelibs/linux_x64 || true
+cp $EXTERNAL_GIT_ROOT/architecture=x86,language=csharp,platform=macos/artifacts/* nativelibs/macosx_x86 || true
+cp $EXTERNAL_GIT_ROOT/architecture=x64,language=csharp,platform=macos/artifacts/* nativelibs/macosx_x64 || true
+
+dotnet restore .
+
+dotnet pack --configuration Release Grpc.Core/project.json --output ../../artifacts
+dotnet pack --configuration Release Grpc.Auth/project.json --output ../../artifacts
+dotnet pack --configuration Release Grpc.HealthCheck/project.json --output ../../artifacts
+
+tar -czf ../../artifacts/csharp_nugets_experimental.tar.gz ../../artifacts/*.nupkg
diff --git a/tools/run_tests/package_targets.py b/tools/run_tests/package_targets.py
index 820b539b59f..39a11a243d6 100644
--- a/tools/run_tests/package_targets.py
+++ b/tools/run_tests/package_targets.py
@@ -71,18 +71,29 @@ def create_jobspec(name, cmdline, environ=None, cwd=None, shell=False,
 class CSharpPackage:
   """Builds C# nuget packages."""
 
-  def __init__(self):
-    self.name = 'csharp_package'
-    self.labels = ['package', 'csharp', 'windows']
+  def __init__(self, use_coreclr=False):
+    self.use_coreclr = use_coreclr
+    self.name = 'csharp_package_coreclr' if use_coreclr else 'csharp_package'
+    self.labels = ['package', 'csharp']
+    if use_coreclr:
+      self.labels += ['linux']
+    else:
+      self.labels += ['windows']
 
   def pre_build_jobspecs(self):
     return []
 
   def build_jobspec(self):
-    return create_jobspec(self.name,
-                          ['build_packages.bat'],
-                          cwd='src\\csharp',
-                          shell=True)
+    if self.use_coreclr:
+      return create_docker_jobspec(
+          self.name,
+          'tools/dockerfile/test/csharp_coreclr_x64',
+          'tools/run_tests/build_package_csharp_coreclr.sh')
+    else:
+      return create_jobspec(self.name,
+                            ['build_packages.bat'],
+                            cwd='src\\csharp',
+                            shell=True)
 
   def __str__(self):
     return self.name
@@ -159,6 +170,7 @@ class PHPPackage:
 def targets():
   """Gets list of supported targets"""
   return [CSharpPackage(),
+          CSharpPackage(use_coreclr=True),
           NodePackage(),
           RubyPackage(),
           PythonPackage(),

From 71448b2898221cfeeeb1f64da8907e7ca6a29a75 Mon Sep 17 00:00:00 2001
From: Masood Malekghassemi <atash@google.com>
Date: Wed, 29 Jun 2016 11:41:24 -0700
Subject: [PATCH 265/280] Use open-source defaults to propagate Python plugin
 configuration

---
 src/compiler/python_generator.cc                     | 3 +++
 src/compiler/python_generator.h                      | 1 +
 src/compiler/python_plugin.cc                        | 2 --
 tools/distrib/python/grpcio_tools/grpc/tools/main.cc | 1 -
 4 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/compiler/python_generator.cc b/src/compiler/python_generator.cc
index 15cda474ccd..c5f1ed80611 100644
--- a/src/compiler/python_generator.cc
+++ b/src/compiler/python_generator.cc
@@ -66,6 +66,9 @@ using std::vector;
 
 namespace grpc_python_generator {
 
+GeneratorConfiguration::GeneratorConfiguration()
+    : grpc_package_root("grpc"), beta_package_root("grpc.beta") {}
+
 PythonGrpcGenerator::PythonGrpcGenerator(const GeneratorConfiguration& config)
     : config_(config) {}
 
diff --git a/src/compiler/python_generator.h b/src/compiler/python_generator.h
index fc51b48daec..7ed99eff0bf 100644
--- a/src/compiler/python_generator.h
+++ b/src/compiler/python_generator.h
@@ -43,6 +43,7 @@ namespace grpc_python_generator {
 // Data pertaining to configuration of the generator with respect to anything
 // that may be used internally at Google.
 struct GeneratorConfiguration {
+  GeneratorConfiguration();
   grpc::string grpc_package_root;
   grpc::string beta_package_root;
 };
diff --git a/src/compiler/python_plugin.cc b/src/compiler/python_plugin.cc
index fc76ee5ec6d..3457aa631a3 100644
--- a/src/compiler/python_plugin.cc
+++ b/src/compiler/python_plugin.cc
@@ -38,8 +38,6 @@
 
 int main(int argc, char* argv[]) {
   grpc_python_generator::GeneratorConfiguration config;
-  config.grpc_package_root = "grpc";
-  config.beta_package_root = "grpc.beta";
   grpc_python_generator::PythonGrpcGenerator generator(config);
   return grpc::protobuf::compiler::PluginMain(argc, argv, &generator);
 }
diff --git a/tools/distrib/python/grpcio_tools/grpc/tools/main.cc b/tools/distrib/python/grpcio_tools/grpc/tools/main.cc
index 81675b4e6fc..83918395135 100644
--- a/tools/distrib/python/grpcio_tools/grpc/tools/main.cc
+++ b/tools/distrib/python/grpcio_tools/grpc/tools/main.cc
@@ -45,7 +45,6 @@ int protoc_main(int argc, char* argv[]) {
 
   // gRPC Python
   grpc_python_generator::GeneratorConfiguration grpc_py_config;
-  grpc_py_config.beta_package_root = "grpc.beta";
   grpc_python_generator::PythonGrpcGenerator grpc_py_generator(grpc_py_config);
   cli.RegisterGenerator("--grpc_python_out", &grpc_py_generator,
                         "Generate Python source file.");

From 103cd6de60911eec98d590eb5640850f48628ae8 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Wed, 29 Jun 2016 11:50:55 -0700
Subject: [PATCH 266/280] fix files/mappings in Grpc.Core nuget

---
 src/csharp/Grpc.Core/project.json                | 16 +++++++++-------
 .../src/csharp/Grpc.Core/project.json.template   | 16 +++++++++-------
 2 files changed, 18 insertions(+), 14 deletions(-)

diff --git a/src/csharp/Grpc.Core/project.json b/src/csharp/Grpc.Core/project.json
index 775764e1d71..cd3720ddc28 100644
--- a/src/csharp/Grpc.Core/project.json
+++ b/src/csharp/Grpc.Core/project.json
@@ -12,13 +12,15 @@
     "requireLicenseAcceptance": false,
     "tags": [ "gRPC RPC Protocol HTTP/2" ],
     "files": {
-      "build/net45/": "Grpc.Core.targets",
-      "build/native/bin/windows_x86/": "../nativelibs/windows_x86/grpc_csharp_ext.dll",
-      "build/native/bin/windows_x64/": "../nativelibs/windows_x64/grpc_csharp_ext.dll",
-      "build/native/bin/linux_x86/": "../nativelibs/linux_x86/libgrpc_csharp_ext.so",
-      "build/native/bin/linux_x64/": "../nativelibs/linux_x64/libgrpc_csharp_ext.so",
-      "build/native/bin/macosx_x86/": "../nativelibs/macosx_x86/libgrpc_csharp_ext.dylib",
-      "build/native/bin/macosx_x64/": "../nativelibs/macosx_x64/libgrpc_csharp_ext.dylib"
+      "mappings": {
+        "build/net45/": "Grpc.Core.targets",
+        "build/native/bin/windows_x86/": "../nativelibs/windows_x86/grpc_csharp_ext.dll",
+        "build/native/bin/windows_x64/": "../nativelibs/windows_x64/grpc_csharp_ext.dll",
+        "build/native/bin/linux_x86/": "../nativelibs/linux_x86/libgrpc_csharp_ext.so",
+        "build/native/bin/linux_x64/": "../nativelibs/linux_x64/libgrpc_csharp_ext.so",
+        "build/native/bin/macosx_x86/": "../nativelibs/macosx_x86/libgrpc_csharp_ext.dylib",
+        "build/native/bin/macosx_x64/": "../nativelibs/macosx_x64/libgrpc_csharp_ext.dylib"
+      }
     }
   },
   "shared": "Version.cs",
diff --git a/templates/src/csharp/Grpc.Core/project.json.template b/templates/src/csharp/Grpc.Core/project.json.template
index e1c05fc8a35..fb9b168bc6d 100644
--- a/templates/src/csharp/Grpc.Core/project.json.template
+++ b/templates/src/csharp/Grpc.Core/project.json.template
@@ -14,13 +14,15 @@
       "requireLicenseAcceptance": false,
       "tags": [ "gRPC RPC Protocol HTTP/2" ],
       "files": {
-        "build/net45/": "Grpc.Core.targets",
-        "build/native/bin/windows_x86/": "../nativelibs/windows_x86/grpc_csharp_ext.dll",
-        "build/native/bin/windows_x64/": "../nativelibs/windows_x64/grpc_csharp_ext.dll",
-        "build/native/bin/linux_x86/": "../nativelibs/linux_x86/libgrpc_csharp_ext.so",
-        "build/native/bin/linux_x64/": "../nativelibs/linux_x64/libgrpc_csharp_ext.so",
-        "build/native/bin/macosx_x86/": "../nativelibs/macosx_x86/libgrpc_csharp_ext.dylib",
-        "build/native/bin/macosx_x64/": "../nativelibs/macosx_x64/libgrpc_csharp_ext.dylib"
+        "mappings": {
+          "build/net45/": "Grpc.Core.targets",
+          "build/native/bin/windows_x86/": "../nativelibs/windows_x86/grpc_csharp_ext.dll",
+          "build/native/bin/windows_x64/": "../nativelibs/windows_x64/grpc_csharp_ext.dll",
+          "build/native/bin/linux_x86/": "../nativelibs/linux_x86/libgrpc_csharp_ext.so",
+          "build/native/bin/linux_x64/": "../nativelibs/linux_x64/libgrpc_csharp_ext.so",
+          "build/native/bin/macosx_x86/": "../nativelibs/macosx_x86/libgrpc_csharp_ext.dylib",
+          "build/native/bin/macosx_x64/": "../nativelibs/macosx_x64/libgrpc_csharp_ext.dylib"
+        }
       }
     },
     "shared": "Version.cs",

From 3f594c117d27ae5fba4e2f6bb054bb5590892863 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Wed, 29 Jun 2016 12:03:21 -0700
Subject: [PATCH 267/280] using shared option for Version.cs leaks it to nuget
 file

---
 templates/src/csharp/Grpc.Auth/project.json.template        | 5 ++++-
 templates/src/csharp/Grpc.Core/project.json.template        | 1 -
 templates/src/csharp/Grpc.HealthCheck/project.json.template | 5 ++++-
 templates/src/csharp/build_options.include                  | 6 ++++++
 4 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/templates/src/csharp/Grpc.Auth/project.json.template b/templates/src/csharp/Grpc.Auth/project.json.template
index 483e34c2e81..d91bd8ce1df 100644
--- a/templates/src/csharp/Grpc.Auth/project.json.template
+++ b/templates/src/csharp/Grpc.Auth/project.json.template
@@ -18,7 +18,10 @@
       "define": [ "SIGNED" ],
       "keyFile": "../keys/Grpc.snk",
       "publicSign": true,
-      "xmlDoc": true
+      "xmlDoc": true,
+      "compile": {
+        "includeFiles": [ "../Grpc.Core/Version.cs" ]
+      }
     },
     "dependencies": {
       "Grpc.Core": "${settings.csharp_version}",
diff --git a/templates/src/csharp/Grpc.Core/project.json.template b/templates/src/csharp/Grpc.Core/project.json.template
index fb9b168bc6d..cdcebc5303d 100644
--- a/templates/src/csharp/Grpc.Core/project.json.template
+++ b/templates/src/csharp/Grpc.Core/project.json.template
@@ -25,7 +25,6 @@
         }
       }
     },
-    "shared": "Version.cs",
     "buildOptions": {
       "embed": [ "../../../etc/roots.pem" ],
       "define": [ "SIGNED" ],
diff --git a/templates/src/csharp/Grpc.HealthCheck/project.json.template b/templates/src/csharp/Grpc.HealthCheck/project.json.template
index 1f2cc798ba1..264ed292050 100644
--- a/templates/src/csharp/Grpc.HealthCheck/project.json.template
+++ b/templates/src/csharp/Grpc.HealthCheck/project.json.template
@@ -18,7 +18,10 @@
       "define": [ "SIGNED" ],
       "keyFile": "../keys/Grpc.snk",
       "publicSign": true,
-      "xmlDoc": true
+      "xmlDoc": true,
+      "compile": {
+        "includeFiles": [ "../Grpc.Core/Version.cs" ]
+      }
     },
     "dependencies": {
       "Grpc.Core": "${settings.csharp_version}",
diff --git a/templates/src/csharp/build_options.include b/templates/src/csharp/build_options.include
index 0af76b81b27..ae96b94f728 100644
--- a/templates/src/csharp/build_options.include
+++ b/templates/src/csharp/build_options.include
@@ -12,6 +12,9 @@
         "keyFile": "../keys/Grpc.snk",
         "publicSign": true,
         "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
         "copyToOutput": {
           % if includeData:
           "include": "data/*",
@@ -31,6 +34,9 @@
         "keyFile": "../keys/Grpc.snk",
         "publicSign": true,
         "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
         "copyToOutput": {
           % if includeData:
           "include": "data/*",

From a9208befc639a5788534aa43d2ba74b3f16165be Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Wed, 29 Jun 2016 12:03:32 -0700
Subject: [PATCH 268/280] regenerate

---
 src/csharp/Grpc.Auth/project.json                           | 5 ++++-
 src/csharp/Grpc.Core.Tests/project.json                     | 6 ++++++
 src/csharp/Grpc.Core/project.json                           | 1 -
 src/csharp/Grpc.Examples.MathClient/project.json            | 6 ++++++
 src/csharp/Grpc.Examples.MathServer/project.json            | 6 ++++++
 src/csharp/Grpc.Examples.Tests/project.json                 | 6 ++++++
 src/csharp/Grpc.HealthCheck.Tests/project.json              | 6 ++++++
 src/csharp/Grpc.HealthCheck/project.json                    | 5 ++++-
 src/csharp/Grpc.IntegrationTesting.Client/project.json      | 6 ++++++
 src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json   | 6 ++++++
 src/csharp/Grpc.IntegrationTesting.Server/project.json      | 6 ++++++
 .../Grpc.IntegrationTesting.StressClient/project.json       | 6 ++++++
 src/csharp/Grpc.IntegrationTesting/project.json             | 6 ++++++
 13 files changed, 68 insertions(+), 3 deletions(-)

diff --git a/src/csharp/Grpc.Auth/project.json b/src/csharp/Grpc.Auth/project.json
index 22414133595..72c258a91ac 100644
--- a/src/csharp/Grpc.Auth/project.json
+++ b/src/csharp/Grpc.Auth/project.json
@@ -16,7 +16,10 @@
     "define": [ "SIGNED" ],
     "keyFile": "../keys/Grpc.snk",
     "publicSign": true,
-    "xmlDoc": true
+    "xmlDoc": true,
+    "compile": {
+      "includeFiles": [ "../Grpc.Core/Version.cs" ]
+    }
   },
   "dependencies": {
     "Grpc.Core": "0.16.0-dev",
diff --git a/src/csharp/Grpc.Core.Tests/project.json b/src/csharp/Grpc.Core.Tests/project.json
index 6402912d05f..f58bcbb5159 100644
--- a/src/csharp/Grpc.Core.Tests/project.json
+++ b/src/csharp/Grpc.Core.Tests/project.json
@@ -9,6 +9,9 @@
         "keyFile": "../keys/Grpc.snk",
         "publicSign": true,
         "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
         "copyToOutput": {
           "mappings": {
             "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
@@ -25,6 +28,9 @@
         "keyFile": "../keys/Grpc.snk",
         "publicSign": true,
         "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
         "copyToOutput": {
           "mappings": {
             "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
diff --git a/src/csharp/Grpc.Core/project.json b/src/csharp/Grpc.Core/project.json
index cd3720ddc28..201e5488014 100644
--- a/src/csharp/Grpc.Core/project.json
+++ b/src/csharp/Grpc.Core/project.json
@@ -23,7 +23,6 @@
       }
     }
   },
-  "shared": "Version.cs",
   "buildOptions": {
     "embed": [ "../../../etc/roots.pem" ],
     "define": [ "SIGNED" ],
diff --git a/src/csharp/Grpc.Examples.MathClient/project.json b/src/csharp/Grpc.Examples.MathClient/project.json
index 378fc8cf8bf..b865cd50118 100644
--- a/src/csharp/Grpc.Examples.MathClient/project.json
+++ b/src/csharp/Grpc.Examples.MathClient/project.json
@@ -9,6 +9,9 @@
         "keyFile": "../keys/Grpc.snk",
         "publicSign": true,
         "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
         "copyToOutput": {
           "mappings": {
             "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
@@ -25,6 +28,9 @@
         "keyFile": "../keys/Grpc.snk",
         "publicSign": true,
         "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
         "copyToOutput": {
           "mappings": {
             "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
diff --git a/src/csharp/Grpc.Examples.MathServer/project.json b/src/csharp/Grpc.Examples.MathServer/project.json
index 378fc8cf8bf..b865cd50118 100644
--- a/src/csharp/Grpc.Examples.MathServer/project.json
+++ b/src/csharp/Grpc.Examples.MathServer/project.json
@@ -9,6 +9,9 @@
         "keyFile": "../keys/Grpc.snk",
         "publicSign": true,
         "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
         "copyToOutput": {
           "mappings": {
             "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
@@ -25,6 +28,9 @@
         "keyFile": "../keys/Grpc.snk",
         "publicSign": true,
         "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
         "copyToOutput": {
           "mappings": {
             "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
diff --git a/src/csharp/Grpc.Examples.Tests/project.json b/src/csharp/Grpc.Examples.Tests/project.json
index 6af06454410..cc518eb6ff7 100644
--- a/src/csharp/Grpc.Examples.Tests/project.json
+++ b/src/csharp/Grpc.Examples.Tests/project.json
@@ -9,6 +9,9 @@
         "keyFile": "../keys/Grpc.snk",
         "publicSign": true,
         "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
         "copyToOutput": {
           "mappings": {
             "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
@@ -25,6 +28,9 @@
         "keyFile": "../keys/Grpc.snk",
         "publicSign": true,
         "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
         "copyToOutput": {
           "mappings": {
             "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
diff --git a/src/csharp/Grpc.HealthCheck.Tests/project.json b/src/csharp/Grpc.HealthCheck.Tests/project.json
index 0e42fe2da63..fbf8d92f04d 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/project.json
+++ b/src/csharp/Grpc.HealthCheck.Tests/project.json
@@ -9,6 +9,9 @@
         "keyFile": "../keys/Grpc.snk",
         "publicSign": true,
         "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
         "copyToOutput": {
           "mappings": {
             "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Debug/grpc_csharp_ext.dll",
@@ -25,6 +28,9 @@
         "keyFile": "../keys/Grpc.snk",
         "publicSign": true,
         "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
         "copyToOutput": {
           "mappings": {
             "nativelibs/windows_x64/grpc_csharp_ext.dll": "../../../vsprojects/x64/Release/grpc_csharp_ext.dll",
diff --git a/src/csharp/Grpc.HealthCheck/project.json b/src/csharp/Grpc.HealthCheck/project.json
index f2e1ce5a658..d9daef720f1 100644
--- a/src/csharp/Grpc.HealthCheck/project.json
+++ b/src/csharp/Grpc.HealthCheck/project.json
@@ -16,7 +16,10 @@
     "define": [ "SIGNED" ],
     "keyFile": "../keys/Grpc.snk",
     "publicSign": true,
-    "xmlDoc": true
+    "xmlDoc": true,
+    "compile": {
+      "includeFiles": [ "../Grpc.Core/Version.cs" ]
+    }
   },
   "dependencies": {
     "Grpc.Core": "0.16.0-dev",
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/project.json b/src/csharp/Grpc.IntegrationTesting.Client/project.json
index 827e5a8e0fb..4a2846feea0 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Client/project.json
@@ -9,6 +9,9 @@
         "keyFile": "../keys/Grpc.snk",
         "publicSign": true,
         "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
@@ -26,6 +29,9 @@
         "keyFile": "../keys/Grpc.snk",
         "publicSign": true,
         "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
index 827e5a8e0fb..4a2846feea0 100644
--- a/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.QpsWorker/project.json
@@ -9,6 +9,9 @@
         "keyFile": "../keys/Grpc.snk",
         "publicSign": true,
         "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
@@ -26,6 +29,9 @@
         "keyFile": "../keys/Grpc.snk",
         "publicSign": true,
         "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/project.json b/src/csharp/Grpc.IntegrationTesting.Server/project.json
index 827e5a8e0fb..4a2846feea0 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.Server/project.json
@@ -9,6 +9,9 @@
         "keyFile": "../keys/Grpc.snk",
         "publicSign": true,
         "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
@@ -26,6 +29,9 @@
         "keyFile": "../keys/Grpc.snk",
         "publicSign": true,
         "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
diff --git a/src/csharp/Grpc.IntegrationTesting.StressClient/project.json b/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
index 827e5a8e0fb..4a2846feea0 100644
--- a/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
+++ b/src/csharp/Grpc.IntegrationTesting.StressClient/project.json
@@ -9,6 +9,9 @@
         "keyFile": "../keys/Grpc.snk",
         "publicSign": true,
         "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
@@ -26,6 +29,9 @@
         "keyFile": "../keys/Grpc.snk",
         "publicSign": true,
         "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
diff --git a/src/csharp/Grpc.IntegrationTesting/project.json b/src/csharp/Grpc.IntegrationTesting/project.json
index 9a364f2ff76..6297600ddc3 100644
--- a/src/csharp/Grpc.IntegrationTesting/project.json
+++ b/src/csharp/Grpc.IntegrationTesting/project.json
@@ -9,6 +9,9 @@
         "keyFile": "../keys/Grpc.snk",
         "publicSign": true,
         "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
         "copyToOutput": {
           "include": "data/*",
           "mappings": {
@@ -26,6 +29,9 @@
         "keyFile": "../keys/Grpc.snk",
         "publicSign": true,
         "xmlDoc": true,
+        "compile": {
+          "includeFiles": [ "../Grpc.Core/Version.cs" ]
+        },
         "copyToOutput": {
           "include": "data/*",
           "mappings": {

From 179740299fe79686e201632058c656b3e87ed9c5 Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@google.com>
Date: Wed, 29 Jun 2016 13:41:38 -0700
Subject: [PATCH 269/280] fixed compiler warning #2

---
 src/objective-c/GRPCClient/private/NSData+GRPC.m | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/objective-c/GRPCClient/private/NSData+GRPC.m b/src/objective-c/GRPCClient/private/NSData+GRPC.m
index 6487bcb5895..1238374af3d 100644
--- a/src/objective-c/GRPCClient/private/NSData+GRPC.m
+++ b/src/objective-c/GRPCClient/private/NSData+GRPC.m
@@ -70,8 +70,8 @@ static grpc_byte_buffer *CopyCharArrayToNewByteBuffer(const char *array,
     return nil;
   }
   char *array;
-  NSUInteger length;
-  MallocAndCopyByteBufferToCharArray(buffer, (size_t *)&length, &array);
+  size_t length;
+  MallocAndCopyByteBufferToCharArray(buffer, &length, &array);
   if (!array) {
     // TODO(jcanizales): grpc_byte_buffer is reference-counted, so we can
     // prevent this memory problem by implementing a subclass of NSData
@@ -79,7 +79,9 @@ static grpc_byte_buffer *CopyCharArrayToNewByteBuffer(const char *array,
     // can be implemented using a grpc_byte_buffer_reader.
     return nil;
   }
-  return [self dataWithBytesNoCopy:array length:length freeWhenDone:YES];
+  // Not depending upon size assumption of NSUInteger
+  NSUInteger length_max = MIN(length, UINT_MAX);
+  return [self dataWithBytesNoCopy:array length:length_max freeWhenDone:YES];
 }
 
 - (grpc_byte_buffer *)grpc_byteBuffer {

From 458b35af34a4f5938e8e5ed7f9141ca3b2574ce4 Mon Sep 17 00:00:00 2001
From: Nathaniel Manista <nathaniel@google.com>
Date: Wed, 29 Jun 2016 21:49:20 +0000
Subject: [PATCH 270/280] Fix Python server interop spec noncompliance

Also fix spelling mistakes in the spec itself.
---
 doc/interop-test-descriptions.md           | 8 ++++----
 src/python/grpcio/tests/interop/methods.py | 9 +++++----
 2 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/doc/interop-test-descriptions.md b/doc/interop-test-descriptions.md
index a4f9abecfae..e7b6f8c3f4d 100644
--- a/doc/interop-test-descriptions.md
+++ b/doc/interop-test-descriptions.md
@@ -968,8 +968,8 @@ request payload bodies received.
 [StreamingOutputCall]: #streamingoutputcall
 
 Server implements StreamingOutputCall by replying, in order, with one
-StreamingOutputCallResponses for each ResponseParameters in
-StreamingOutputCallRequest. Each StreamingOutputCallResponses should have a
+StreamingOutputCallResponse for each ResponseParameters in
+StreamingOutputCallRequest. Each StreamingOutputCallResponse should have a
 payload body of size ResponseParameters.size bytes, as specified by its
 respective ResponseParameters. After sending all responses, it closes with OK.
 
@@ -977,8 +977,8 @@ respective ResponseParameters. After sending all responses, it closes with OK.
 [FullDuplexCall]: #fullduplexcall
 
 Server implements FullDuplexCall by replying, in order, with one
-StreamingOutputCallResponses for each ResponseParameters in each
-StreamingOutputCallRequest. Each StreamingOutputCallResponses should have a
+StreamingOutputCallResponse for each ResponseParameters in each
+StreamingOutputCallRequest. Each StreamingOutputCallResponse should have a
 payload body of size ResponseParameters.size bytes, as specified by its
 respective ResponseParameters. After receiving half close and sending all
 responses, it closes with OK.
diff --git a/src/python/grpcio/tests/interop/methods.py b/src/python/grpcio/tests/interop/methods.py
index 7eac5115258..86aa0495a2c 100644
--- a/src/python/grpcio/tests/interop/methods.py
+++ b/src/python/grpcio/tests/interop/methods.py
@@ -79,10 +79,11 @@ class TestService(test_pb2.BetaTestServiceServicer):
 
   def FullDuplexCall(self, request_iterator, context):
     for request in request_iterator:
-      yield messages_pb2.StreamingOutputCallResponse(
-          payload=messages_pb2.Payload(
-              type=request.payload.type,
-              body=b'\x00' * request.response_parameters[0].size))
+      for response_parameters in request.response_parameters:
+        yield messages_pb2.StreamingOutputCallResponse(
+            payload=messages_pb2.Payload(
+                type=request.payload.type,
+                body=b'\x00' * response_parameters.size))
 
   # NOTE(nathaniel): Apparently this is the same as the full-duplex call?
   # NOTE(atash): It isn't even called in the interop spec (Oct 22 2015)...

From 84d2e479b6ef4a4e20499fb003f9906f1c3c12ee Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Wed, 29 Jun 2016 14:53:46 -0700
Subject: [PATCH 271/280] implemented eventfd_check_availability

---
 src/core/lib/iomgr/wakeup_fd_eventfd.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/core/lib/iomgr/wakeup_fd_eventfd.c b/src/core/lib/iomgr/wakeup_fd_eventfd.c
index 667b4a5f901..95f61023306 100644
--- a/src/core/lib/iomgr/wakeup_fd_eventfd.c
+++ b/src/core/lib/iomgr/wakeup_fd_eventfd.c
@@ -84,8 +84,10 @@ static void eventfd_destroy(grpc_wakeup_fd* fd_info) {
 }
 
 static int eventfd_check_availability(void) {
-  /* TODO(klempner): Actually check if eventfd is available */
-  return 1;
+  const int efd = eventfd(0, 0);
+  const int is_available = efd >= 0;
+  if (is_available) close(efd);
+  return is_available;
 }
 
 const grpc_wakeup_fd_vtable grpc_specialized_wakeup_fd_vtable = {

From 51b3691e08fd3bf489f7f92b0d476c2cd4d3d777 Mon Sep 17 00:00:00 2001
From: Stanley Cheung <stanleycheung@google.com>
Date: Wed, 29 Jun 2016 15:05:59 -0700
Subject: [PATCH 272/280] php: fix shutdown hang, call was never destroyed

---
 src/php/ext/grpc/call.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/php/ext/grpc/call.c b/src/php/ext/grpc/call.c
index 0ec502262de..2cd45f10dc4 100644
--- a/src/php/ext/grpc/call.c
+++ b/src/php/ext/grpc/call.c
@@ -248,6 +248,7 @@ PHP_METHOD(Call, __construct) {
   call->wrapped = grpc_channel_create_call(
       channel->wrapped, NULL, GRPC_PROPAGATE_DEFAULTS, completion_queue, method,
       host_override, deadline->wrapped, NULL);
+  call->owned = true;
 }
 
 /**

From 42812723893b08c466b830b0515c20bd5edb21dc Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Wed, 29 Jun 2016 17:39:07 -0700
Subject: [PATCH 273/280] Updated git clone URL

---
 INSTALL.md                                   | 2 +-
 examples/cpp/README.md                       | 2 +-
 examples/cpp/cpptutorial.md                  | 2 +-
 examples/cpp/helloworld/README.md            | 2 +-
 examples/node/README.md                      | 2 +-
 examples/objective-c/helloworld/README.md    | 2 +-
 examples/php/README.md                       | 2 +-
 src/cpp/README.md                            | 2 +-
 src/php/README.md                            | 4 ++--
 src/python/grpcio/README.rst                 | 2 +-
 tools/distrib/python/grpcio_tools/README.rst | 2 +-
 11 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/INSTALL.md b/INSTALL.md
index 66e6c33a775..6718aad120d 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -49,7 +49,7 @@ For developers who are interested to contribute, here is how to compile the
 gRPC C Core library.
 
 ```sh
- $ git clone https://github.com/grpc/grpc.git
+ $ git clone -b $(curl -L http://grpc.io/release) https://github.com/grpc/grpc
  $ cd grpc
  $ git submodule update --init
  $ make
diff --git a/examples/cpp/README.md b/examples/cpp/README.md
index d93cbacf7b2..3fa7ad4c784 100644
--- a/examples/cpp/README.md
+++ b/examples/cpp/README.md
@@ -14,7 +14,7 @@ following command:
 
 
 ```sh
-$ git clone https://github.com/grpc/grpc.git
+$ git clone -b $(curl -L http://grpc.io/release) https://github.com/grpc/grpc
 ```
 
 Change your current directory to examples/cpp/helloworld
diff --git a/examples/cpp/cpptutorial.md b/examples/cpp/cpptutorial.md
index ef9ca99c0fe..80fef07192e 100644
--- a/examples/cpp/cpptutorial.md
+++ b/examples/cpp/cpptutorial.md
@@ -20,7 +20,7 @@ With gRPC we can define our service once in a .proto file and implement clients
 
 The example code for our tutorial is in [examples/cpp/route_guide](route_guide). To download the example, clone this repository by running the following command:
 ```shell
-$ git clone https://github.com/grpc/grpc.git
+$ git clone -b $(curl -L http://grpc.io/release) https://github.com/grpc/grpc
 ```
 
 Then change your current directory to `examples/cpp/route_guide`:
diff --git a/examples/cpp/helloworld/README.md b/examples/cpp/helloworld/README.md
index 04283eabc35..db953f53628 100644
--- a/examples/cpp/helloworld/README.md
+++ b/examples/cpp/helloworld/README.md
@@ -12,7 +12,7 @@ following command:
 
 
 ```sh
-$ git clone https://github.com/grpc/grpc.git
+$ git clone -b $(curl -L http://grpc.io/release) https://github.com/grpc/grpc
 ```
 
 Change your current directory to examples/cpp/helloworld
diff --git a/examples/node/README.md b/examples/node/README.md
index 59fb4a17f59..b92ca383c47 100644
--- a/examples/node/README.md
+++ b/examples/node/README.md
@@ -12,7 +12,7 @@ INSTALL
    ```sh
    $ # Get the gRPC repository
    $ export REPO_ROOT=grpc # REPO root can be any directory of your choice
-   $ git clone https://github.com/grpc/grpc.git $REPO_ROOT
+   $ git clone -b $(curl -L http://grpc.io/release) https://github.com/grpc/grpc $REPO_ROOT
    $ cd $REPO_ROOT
 
    $ cd examples/node
diff --git a/examples/objective-c/helloworld/README.md b/examples/objective-c/helloworld/README.md
index 81c5aaa7bcb..fdff938a978 100644
--- a/examples/objective-c/helloworld/README.md
+++ b/examples/objective-c/helloworld/README.md
@@ -16,7 +16,7 @@ this repository to your local machine by running the following commands:
 
 
 ```sh
-$ git clone https://github.com/grpc/grpc.git
+$ git clone -b $(curl -L http://grpc.io/release) https://github.com/grpc/grpc
 $ cd grpc
 $ git submodule update --init
 ```
diff --git a/examples/php/README.md b/examples/php/README.md
index ea9ccb67908..e56b0178730 100644
--- a/examples/php/README.md
+++ b/examples/php/README.md
@@ -17,7 +17,7 @@ INSTALL
  - Clone this repository
 
    ```sh
-   $ git clone https://github.com/grpc/grpc.git
+   $ git clone -b $(curl -L http://grpc.io/release) https://github.com/grpc/grpc
    ```
 
  - Install composer
diff --git a/src/cpp/README.md b/src/cpp/README.md
index f2935e52d9e..8c0f85e5ff7 100644
--- a/src/cpp/README.md
+++ b/src/cpp/README.md
@@ -51,7 +51,7 @@ below.
 #Build from Source
 
 ```sh
- $ git clone https://github.com/grpc/grpc.git
+ $ git clone -b $(curl -L http://grpc.io/release) https://github.com/grpc/grpc
  $ cd grpc
  $ git submodule update --init
  $ make
diff --git a/src/php/README.md b/src/php/README.md
index cf8f2c11b0f..6cc1ba4d462 100644
--- a/src/php/README.md
+++ b/src/php/README.md
@@ -58,7 +58,7 @@ To run tests with generated stub code from `.proto` files, you will also need th
 Clone this repository
 
 ```sh
-$ git clone https://github.com/grpc/grpc.git
+$ git clone -b $(curl -L http://grpc.io/release) https://github.com/grpc/grpc
 ```
 
 Build and install the gRPC C core library
@@ -101,7 +101,7 @@ extension=grpc.so
 You will need the source code to run tests
 
 ```sh
-$ git clone https://github.com/grpc/grpc.git
+$ git clone -b $(curl -L http://grpc.io/release) https://github.com/grpc/grpc
 $ cd grpc
 $ git pull --recurse-submodules && git submodule update --init --recursive
 ```
diff --git a/src/python/grpcio/README.rst b/src/python/grpcio/README.rst
index afc4fe6a370..3fc318539ea 100644
--- a/src/python/grpcio/README.rst
+++ b/src/python/grpcio/README.rst
@@ -46,7 +46,7 @@ package named :code:`python-dev`).
 ::
 
   $ export REPO_ROOT=grpc  # REPO_ROOT can be any directory of your choice
-  $ git clone https://github.com/grpc/grpc.git $REPO_ROOT
+  $ git clone -b $(curl -L http://grpc.io/release) https://github.com/grpc/grpc $REPO_ROOT
   $ cd $REPO_ROOT
   $ git submodule update --init
 
diff --git a/tools/distrib/python/grpcio_tools/README.rst b/tools/distrib/python/grpcio_tools/README.rst
index e9f137493ba..8946a1d5b31 100644
--- a/tools/distrib/python/grpcio_tools/README.rst
+++ b/tools/distrib/python/grpcio_tools/README.rst
@@ -53,7 +53,7 @@ GCC-like stuff, but you may end up having a bad time.
 ::
 
   $ export REPO_ROOT=grpc  # REPO_ROOT can be any directory of your choice
-  $ git clone https://github.com/grpc/grpc.git $REPO_ROOT
+  $ git clone -b $(curl -L http://grpc.io/release) https://github.com/grpc/grpc $REPO_ROOT
   $ cd $REPO_ROOT
   $ git submodule update --init
 

From 6a654dd400cc204a1ceb059785821c8ea15acde9 Mon Sep 17 00:00:00 2001
From: Ken Payson <kpayson@google.com>
Date: Mon, 27 Jun 2016 14:12:08 -0700
Subject: [PATCH 274/280] Changed default string type to be str

This impacts the following APIs:
  Metadata: Key is always a str, Value is bytes for binary metadata,
    str otherwise
  Call Details: str type
  gRPC method: str type
  hostname/target: str type
---
 src/python/grpcio/grpc/_channel.py            | 46 +++++----
 src/python/grpcio/grpc/_common.py             | 43 ++++++---
 .../grpc/_cython/_cygrpc/channel.pyx.pxi      |  5 +-
 .../grpc/_cython/_cygrpc/credentials.pyx.pxi  |  8 +-
 .../grpc/_cython/_cygrpc/records.pyx.pxi      | 36 +++----
 .../grpc/_cython/_cygrpc/server.pyx.pxi       |  2 +-
 src/python/grpcio/grpc/_plugin_wrapping.py    | 14 +--
 src/python/grpcio/grpc/_server.py             | 42 ++++----
 .../grpcio/grpc/beta/_server_adaptations.py   |  3 +-
 .../grpcio/tests/unit/_compression_test.py    |  4 +-
 .../unit/_cython/_cancel_many_calls_test.py   |  4 +-
 .../tests/unit/_cython/_channel_test.py       |  2 +-
 .../_read_some_but_not_all_responses_test.py  |  4 +-
 .../grpcio/tests/unit/_cython/cygrpc_test.py  | 40 ++++----
 .../grpcio/tests/unit/_empty_message_test.py  |  8 +-
 .../tests/unit/_metadata_code_details_test.py | 32 +++----
 .../grpcio/tests/unit/_metadata_test.py       | 24 ++---
 src/python/grpcio/tests/unit/_rpc_test.py     | 96 +++++++++----------
 .../grpcio/tests/unit/beta/_utilities_test.py | 21 +---
 .../grpcio/tests/unit/beta/test_utilities.py  |  2 +-
 src/python/grpcio/tests/unit/test_common.py   | 18 ++--
 21 files changed, 225 insertions(+), 229 deletions(-)

diff --git a/src/python/grpcio/grpc/_channel.py b/src/python/grpcio/grpc/_channel.py
index cf6175d0314..a89b5013030 100644
--- a/src/python/grpcio/grpc/_channel.py
+++ b/src/python/grpcio/grpc/_channel.py
@@ -364,13 +364,13 @@ class _Rendezvous(grpc.RpcError, grpc.Future, grpc.Call):
     with self._state.condition:
       while self._state.initial_metadata is None:
         self._state.condition.wait()
-      return self._state.initial_metadata
+      return _common.application_metadata(self._state.initial_metadata)
 
   def trailing_metadata(self):
     with self._state.condition:
       while self._state.trailing_metadata is None:
         self._state.condition.wait()
-      return self._state.trailing_metadata
+      return _common.application_metadata(self._state.trailing_metadata)
 
   def code(self):
     with self._state.condition:
@@ -382,7 +382,7 @@ class _Rendezvous(grpc.RpcError, grpc.Future, grpc.Call):
     with self._state.condition:
       while self._state.details is None:
         self._state.condition.wait()
-      return self._state.details
+      return _common.decode(self._state.details)
 
   def _repr(self):
     with self._state.condition:
@@ -390,7 +390,7 @@ class _Rendezvous(grpc.RpcError, grpc.Future, grpc.Call):
         return '<_Rendezvous object of in-flight RPC>'
       else:
         return '<_Rendezvous of RPC that terminated with ({}, {})>'.format(
-            self._state.code, self._state.details)
+            self._state.code, _common.decode(self._state.details))
 
   def __repr__(self):
     return self._repr()
@@ -451,7 +451,7 @@ class _UnaryUnaryMultiCallable(grpc.UnaryUnaryMultiCallable):
       state = _RPCState(_UNARY_UNARY_INITIAL_DUE, None, None, None, None)
       operations = (
           cygrpc.operation_send_initial_metadata(
-              _common.metadata(metadata), _EMPTY_FLAGS),
+              _common.cygrpc_metadata(metadata), _EMPTY_FLAGS),
           cygrpc.operation_send_message(serialized_request, _EMPTY_FLAGS),
           cygrpc.operation_send_close_from_client(_EMPTY_FLAGS),
           cygrpc.operation_receive_initial_metadata(_EMPTY_FLAGS),
@@ -529,7 +529,7 @@ class _UnaryStreamMultiCallable(grpc.UnaryStreamMultiCallable):
             event_handler)
         operations = (
             cygrpc.operation_send_initial_metadata(
-                _common.metadata(metadata), _EMPTY_FLAGS),
+                _common.cygrpc_metadata(metadata), _EMPTY_FLAGS),
             cygrpc.operation_send_message(serialized_request, _EMPTY_FLAGS),
             cygrpc.operation_send_close_from_client(_EMPTY_FLAGS),
             cygrpc.operation_receive_status_on_client(_EMPTY_FLAGS),
@@ -564,7 +564,7 @@ class _StreamUnaryMultiCallable(grpc.StreamUnaryMultiCallable):
           None)
       operations = (
           cygrpc.operation_send_initial_metadata(
-              _common.metadata(metadata), _EMPTY_FLAGS),
+              _common.cygrpc_metadata(metadata), _EMPTY_FLAGS),
           cygrpc.operation_receive_message(_EMPTY_FLAGS),
           cygrpc.operation_receive_status_on_client(_EMPTY_FLAGS),
       )
@@ -608,7 +608,7 @@ class _StreamUnaryMultiCallable(grpc.StreamUnaryMultiCallable):
           event_handler)
       operations = (
           cygrpc.operation_send_initial_metadata(
-              _common.metadata(metadata), _EMPTY_FLAGS),
+              _common.cygrpc_metadata(metadata), _EMPTY_FLAGS),
           cygrpc.operation_receive_message(_EMPTY_FLAGS),
           cygrpc.operation_receive_status_on_client(_EMPTY_FLAGS),
       )
@@ -645,7 +645,7 @@ class _StreamStreamMultiCallable(grpc.StreamStreamMultiCallable):
           event_handler)
       operations = (
           cygrpc.operation_send_initial_metadata(
-              _common.metadata(metadata), _EMPTY_FLAGS),
+              _common.cygrpc_metadata(metadata), _EMPTY_FLAGS),
           cygrpc.operation_receive_status_on_client(_EMPTY_FLAGS),
       )
       call.start_batch(cygrpc.Operations(operations), event_handler)
@@ -846,8 +846,13 @@ def _options(options):
   else:
     pairs = list(options) + [
         (cygrpc.ChannelArgKey.primary_user_agent_string, _USER_AGENT)]
-  return cygrpc.ChannelArgs(
-      cygrpc.ChannelArg(arg_name, arg_value) for arg_name, arg_value in pairs)
+  encoded_pairs = [
+      (_common.encode(arg_name), arg_value) if isinstance(arg_value, int)
+      else (_common.encode(arg_name), _common.encode(arg_value))
+      for arg_name, arg_value in pairs]
+  return cygrpc.ChannelArgs([
+      cygrpc.ChannelArg(arg_name, arg_value)
+      for arg_name, arg_value in encoded_pairs])
 
 
 class Channel(grpc.Channel):
@@ -860,7 +865,8 @@ class Channel(grpc.Channel):
       options: Configuration options for the channel.
       credentials: A cygrpc.ChannelCredentials or None.
     """
-    self._channel = cygrpc.Channel(target, _options(options), credentials)
+    self._channel = cygrpc.Channel(
+        _common.encode(target), _options(options), credentials)
     self._call_state = _ChannelCallState(self._channel)
     self._connectivity_state = _ChannelConnectivityState(self._channel)
 
@@ -873,26 +879,26 @@ class Channel(grpc.Channel):
   def unary_unary(
       self, method, request_serializer=None, response_deserializer=None):
     return _UnaryUnaryMultiCallable(
-        self._channel, _create_channel_managed_call(self._call_state), method,
-        request_serializer, response_deserializer)
+        self._channel, _create_channel_managed_call(self._call_state),
+        _common.encode(method), request_serializer, response_deserializer)
 
   def unary_stream(
       self, method, request_serializer=None, response_deserializer=None):
     return _UnaryStreamMultiCallable(
-        self._channel, _create_channel_managed_call(self._call_state), method,
-        request_serializer, response_deserializer)
+        self._channel, _create_channel_managed_call(self._call_state),
+        _common.encode(method), request_serializer, response_deserializer)
 
   def stream_unary(
       self, method, request_serializer=None, response_deserializer=None):
     return _StreamUnaryMultiCallable(
-        self._channel, _create_channel_managed_call(self._call_state), method,
-        request_serializer, response_deserializer)
+        self._channel, _create_channel_managed_call(self._call_state),
+        _common.encode(method), request_serializer, response_deserializer)
 
   def stream_stream(
       self, method, request_serializer=None, response_deserializer=None):
     return _StreamStreamMultiCallable(
-        self._channel, _create_channel_managed_call(self._call_state), method,
-        request_serializer, response_deserializer)
+        self._channel, _create_channel_managed_call(self._call_state),
+        _common.encode(method), request_serializer, response_deserializer)
 
   def __del__(self):
     _moot(self._connectivity_state)
diff --git a/src/python/grpcio/grpc/_common.py b/src/python/grpcio/grpc/_common.py
index f351bea9e39..4d7d5214195 100644
--- a/src/python/grpcio/grpc/_common.py
+++ b/src/python/grpcio/grpc/_common.py
@@ -76,9 +76,37 @@ STATUS_CODE_TO_CYGRPC_STATUS_CODE = {
 }
 
 
-def metadata(application_metadata):
+def encode(s):
+  if isinstance(s, bytes):
+    return s
+  else:
+    return s.encode('ascii')
+
+
+def decode(b):
+  if isinstance(b, str):
+    return b
+  else:
+    try:
+      return b.decode('utf8')
+    except UnicodeDecodeError:
+      logging.exception('Invalid encoding on {}'.format(b))
+      return b.decode('latin1')
+
+
+def cygrpc_metadata(application_metadata):
   return _EMPTY_METADATA if application_metadata is None else cygrpc.Metadata(
-      cygrpc.Metadatum(key, value) for key, value in application_metadata)
+      cygrpc.Metadatum(encode(key), encode(value))
+      for key, value in application_metadata)
+
+
+def application_metadata(cygrpc_metadata):
+  if cygrpc_metadata is None:
+    return ()
+  else:
+    return tuple(
+        (decode(key), value if key[-4:] == b'-bin' else decode(value))
+        for key, value in cygrpc_metadata)
 
 
 def _transform(message, transformer, exception_message):
@@ -101,17 +129,8 @@ def deserialize(serialized_message, deserializer):
                     'Exception deserializing message!')
 
 
-def _encode(s):
-  if isinstance(s, bytes):
-    return s
-  else:
-    return s.encode('ascii')
-
-
 def fully_qualified_method(group, method):
-  group = _encode(group)
-  method = _encode(method)
-  return b'/' + group + b'/' + method
+  return '/{}/{}'.format(group, method)
 
 
 class CleanupThread(threading.Thread):
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi
index 866cff0d019..14066965104 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi
@@ -32,9 +32,8 @@ cimport cpython
 
 cdef class Channel:
 
-  def __cinit__(self, target, ChannelArgs arguments=None,
+  def __cinit__(self, bytes target, ChannelArgs arguments=None,
                 ChannelCredentials channel_credentials=None):
-    target = str_to_bytes(target)
     cdef grpc_channel_args *c_arguments = NULL
     cdef char *c_target = NULL
     self.c_channel = NULL
@@ -57,8 +56,6 @@ cdef class Channel:
   def create_call(self, Call parent, int flags,
                   CompletionQueue queue not None,
                   method, host, Timespec deadline not None):
-    method = str_to_bytes(method)
-    host = str_to_bytes(host)
     if queue.is_shutting_down:
       raise ValueError("queue must not be shutting down or shutdown")
     cdef char *method_c_string = method
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/credentials.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/credentials.pyx.pxi
index 470382d6091..b24e69243e9 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/credentials.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/credentials.pyx.pxi
@@ -82,7 +82,7 @@ cdef class ServerCredentials:
 
 cdef class CredentialsMetadataPlugin:
 
-  def __cinit__(self, object plugin_callback, name):
+  def __cinit__(self, object plugin_callback, bytes name):
     """
     Args:
       plugin_callback (callable): Callback accepting a service URL (str/bytes)
@@ -91,9 +91,8 @@ cdef class CredentialsMetadataPlugin:
         when called should be non-blocking and eventually call the callback
         object with the appropriate status code/details and metadata (if
         successful).
-      name (str): Plugin name.
+      name (bytes): Plugin name.
     """
-    name = str_to_bytes(name)
     if not callable(plugin_callback):
       raise ValueError('expected callable plugin_callback')
     self.plugin_callback = plugin_callback
@@ -130,8 +129,7 @@ cdef void plugin_get_metadata(
     grpc_credentials_plugin_metadata_cb cb, void *user_data) with gil:
   def python_callback(
       Metadata metadata, grpc_status_code status,
-      error_details):
-    error_details = str_to_bytes(error_details)
+      bytes error_details):
     cb(user_data, metadata.c_metadata_array.metadata,
        metadata.c_metadata_array.count, status, error_details)
   cdef CredentialsMetadataPlugin self = <CredentialsMetadataPlugin>state
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
index 0055d0d3a28..8e651e880f3 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
@@ -231,17 +231,10 @@ cdef class Event:
 
 cdef class ByteBuffer:
 
-  def __cinit__(self, data):
+  def __cinit__(self, bytes data):
     if data is None:
       self.c_byte_buffer = NULL
       return
-    if isinstance(data, ByteBuffer):
-      data = (<ByteBuffer>data).bytes()
-      if data is None:
-        self.c_byte_buffer = NULL
-        return
-    else:
-      data = str_to_bytes(data)
 
     cdef char *c_data = data
     cdef gpr_slice data_slice
@@ -296,26 +289,28 @@ cdef class ByteBuffer:
 
 cdef class SslPemKeyCertPair:
 
-  def __cinit__(self, private_key, certificate_chain):
-    self.private_key = str_to_bytes(private_key)
-    self.certificate_chain = str_to_bytes(certificate_chain)
+  def __cinit__(self, bytes private_key, bytes certificate_chain):
+    self.private_key = private_key
+    self.certificate_chain = certificate_chain
     self.c_pair.private_key = self.private_key
     self.c_pair.certificate_chain = self.certificate_chain
 
 
 cdef class ChannelArg:
 
-  def __cinit__(self, key, value):
-    self.key = str_to_bytes(key)
+  def __cinit__(self, bytes key, value):
+    self.key = key
     self.c_arg.key = self.key
     if isinstance(value, int):
-      self.value = int(value)
+      self.value = value
       self.c_arg.type = GRPC_ARG_INTEGER
       self.c_arg.value.integer = self.value
-    else:
-      self.value = str_to_bytes(value)
+    elif isinstance(value, bytes):
+      self.value = value
       self.c_arg.type = GRPC_ARG_STRING
       self.c_arg.value.string = self.value
+    else:
+      raise TypeError('Expected int or bytes, got {}'.format(type(value)))
 
 
 cdef class ChannelArgs:
@@ -347,9 +342,9 @@ cdef class ChannelArgs:
 
 cdef class Metadatum:
 
-  def __cinit__(self, key, value):
-    self._key = str_to_bytes(key)
-    self._value = str_to_bytes(value)
+  def __cinit__(self, bytes key, bytes value):
+    self._key = key
+    self._value = value
     self.c_metadata.key = self._key
     self.c_metadata.value = self._value
     self.c_metadata.value_length = len(self._value)
@@ -563,8 +558,7 @@ def operation_send_close_from_client(int flags):
   return op
 
 def operation_send_status_from_server(
-    Metadata metadata, grpc_status_code code, details, int flags):
-  details = str_to_bytes(details)
+    Metadata metadata, grpc_status_code code, bytes details, int flags):
   cdef Operation op = Operation()
   op.c_op.type = GRPC_OP_SEND_STATUS_FROM_SERVER
   op.c_op.flags = flags
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/server.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/server.pyx.pxi
index 42afeb84987..3e03b6efe10 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/server.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/server.pyx.pxi
@@ -101,7 +101,7 @@ cdef class Server:
     # Ensure the core has gotten a chance to do the start-up work
     self.backup_shutdown_queue.poll(Timespec(None))
 
-  def add_http2_port(self, address,
+  def add_http2_port(self, bytes address,
                      ServerCredentials server_credentials=None):
     address = str_to_bytes(address)
     self.references.append(address)
diff --git a/src/python/grpcio/grpc/_plugin_wrapping.py b/src/python/grpcio/grpc/_plugin_wrapping.py
index 4e9cfe710cd..7cb5218c22b 100644
--- a/src/python/grpcio/grpc/_plugin_wrapping.py
+++ b/src/python/grpcio/grpc/_plugin_wrapping.py
@@ -31,6 +31,7 @@ import collections
 import threading
 
 import grpc
+from grpc import _common
 from grpc._cython import cygrpc
 
 
@@ -62,17 +63,16 @@ class _WrappedCygrpcCallback(object):
     # TODO(atash) translate different Exception superclasses into different
     # status codes.
     self.cygrpc_callback(
-        cygrpc.Metadata([]), cygrpc.StatusCode.internal, error.message)
+        _common.EMPTY_METADATA, cygrpc.StatusCode.internal,
+        _common.encode(str(error)))
 
   def _invoke_success(self, metadata):
     try:
-      cygrpc_metadata = cygrpc.Metadata(
-          cygrpc.Metadatum(key, value)
-          for key, value in metadata)
+      cygrpc_metadata = _common.cygrpc_metadata(metadata)
     except Exception as error:
       self._invoke_failure(error)
       return
-    self.cygrpc_callback(cygrpc_metadata, cygrpc.StatusCode.ok, '')
+    self.cygrpc_callback(cygrpc_metadata, cygrpc.StatusCode.ok, b'')
 
   def __call__(self, metadata, error):
     with self.is_called_lock:
@@ -101,7 +101,7 @@ class _WrappedPlugin(object):
   def __call__(self, context, cygrpc_callback):
     wrapped_cygrpc_callback = _WrappedCygrpcCallback(cygrpc_callback)
     wrapped_context = AuthMetadataContext(
-        context.service_url, context.method_name)
+        _common.decode(context.service_url), _common.decode(context.method_name))
     try:
       self.plugin(
           wrapped_context, AuthMetadataPluginCallback(wrapped_cygrpc_callback))
@@ -120,4 +120,4 @@ def call_credentials_metadata_plugin(plugin, name):
       plugin's invocation must be non-blocking.
   """
   return cygrpc.call_credentials_metadata_plugin(
-      cygrpc.CredentialsMetadataPlugin(_WrappedPlugin(plugin), name))
+      cygrpc.CredentialsMetadataPlugin(_WrappedPlugin(plugin), _common.encode(name)))
diff --git a/src/python/grpcio/grpc/_server.py b/src/python/grpcio/grpc/_server.py
index bf20f15f729..f4c114056fe 100644
--- a/src/python/grpcio/grpc/_server.py
+++ b/src/python/grpcio/grpc/_server.py
@@ -87,7 +87,7 @@ def _abortion_code(state, code):
 
 
 def _details(state):
-  return '' if state.details is None else state.details
+  return b'' if state.details is None else state.details
 
 
 class _HandlerCallDetails(
@@ -146,14 +146,14 @@ def _abort(state, call, code, details):
           cygrpc.operation_send_initial_metadata(
               _EMPTY_METADATA, _EMPTY_FLAGS),
           cygrpc.operation_send_status_from_server(
-              _common.metadata(state.trailing_metadata), effective_code,
+              _common.cygrpc_metadata(state.trailing_metadata), effective_code,
               effective_details, _EMPTY_FLAGS),
       )
       token = _SEND_INITIAL_METADATA_AND_SEND_STATUS_FROM_SERVER_TOKEN
     else:
       operations = (
           cygrpc.operation_send_status_from_server(
-              _common.metadata(state.trailing_metadata), effective_code,
+              _common.cygrpc_metadata(state.trailing_metadata), effective_code,
               effective_details, _EMPTY_FLAGS),
       )
       token = _SEND_STATUS_FROM_SERVER_TOKEN
@@ -191,7 +191,7 @@ def _receive_message(state, call, request_deserializer):
         if request is None:
           _abort(
               state, call, cygrpc.StatusCode.internal,
-              'Exception deserializing request!')
+              b'Exception deserializing request!')
         else:
           state.request = request
         state.condition.notify_all()
@@ -244,10 +244,10 @@ class _Context(grpc.ServicerContext):
       self._state.disable_next_compression = True
 
   def invocation_metadata(self):
-    return self._rpc_event.request_metadata
+    return _common.application_metadata(self._rpc_event.request_metadata)
 
   def peer(self):
-    return self._rpc_event.operation_call.peer()
+    return _common.decode(self._rpc_event.operation_call.peer())
 
   def send_initial_metadata(self, initial_metadata):
     with self._state.condition:
@@ -256,7 +256,7 @@ class _Context(grpc.ServicerContext):
       else:
         if self._state.initial_metadata_allowed:
           operation = cygrpc.operation_send_initial_metadata(
-              _common.metadata(initial_metadata), _EMPTY_FLAGS)
+              _common.cygrpc_metadata(initial_metadata), _EMPTY_FLAGS)
           self._rpc_event.operation_call.start_batch(
               cygrpc.Operations((operation,)),
               _send_initial_metadata(self._state))
@@ -267,7 +267,8 @@ class _Context(grpc.ServicerContext):
 
   def set_trailing_metadata(self, trailing_metadata):
     with self._state.condition:
-      self._state.trailing_metadata = trailing_metadata
+      self._state.trailing_metadata = _common.cygrpc_metadata(
+          trailing_metadata)
 
   def set_code(self, code):
     with self._state.condition:
@@ -275,7 +276,7 @@ class _Context(grpc.ServicerContext):
 
   def set_details(self, details):
     with self._state.condition:
-      self._state.details = details
+      self._state.details = _common.encode(details)
 
 
 class _RequestIterator(object):
@@ -346,7 +347,7 @@ def _unary_request(rpc_event, state, request_deserializer):
                   rpc_event.request_call_details.method)
               _abort(
                   state, rpc_event.operation_call,
-                  cygrpc.StatusCode.unimplemented, details)
+                  cygrpc.StatusCode.unimplemented, _common.encode(details))
               return None
             elif state.client is _CANCELLED:
               return None
@@ -366,8 +367,8 @@ def _call_behavior(rpc_event, state, behavior, argument, request_deserializer):
       if e not in state.rpc_errors:
         details = 'Exception calling application: {}'.format(e)
         logging.exception(details)
-        _abort(
-            state, rpc_event.operation_call, cygrpc.StatusCode.unknown, details)
+        _abort(state, rpc_event.operation_call,
+               cygrpc.StatusCode.unknown, _common.encode(details))
     return None, False
 
 
@@ -381,8 +382,8 @@ def _take_response_from_response_iterator(rpc_event, state, response_iterator):
       if e not in state.rpc_errors:
         details = 'Exception iterating responses: {}'.format(e)
         logging.exception(details)
-        _abort(
-            state, rpc_event.operation_call, cygrpc.StatusCode.unknown, details)
+        _abort(state, rpc_event.operation_call,
+               cygrpc.StatusCode.unknown, _common.encode(details))
     return None, False
 
 
@@ -392,7 +393,7 @@ def _serialize_response(rpc_event, state, response, response_serializer):
     with state.condition:
       _abort(
           state, rpc_event.operation_call, cygrpc.StatusCode.internal,
-          'Failed to serialize response!')
+          b'Failed to serialize response!')
     return None
   else:
     return serialized_response
@@ -428,7 +429,7 @@ def _send_response(rpc_event, state, serialized_response):
 def _status(rpc_event, state, serialized_response):
   with state.condition:
     if state.client is not _CANCELLED:
-      trailing_metadata = _common.metadata(state.trailing_metadata)
+      trailing_metadata = _common.cygrpc_metadata(state.trailing_metadata)
       code = _completion_code(state)
       details = _details(state)
       operations = [
@@ -532,7 +533,8 @@ def _find_method_handler(rpc_event, generic_handlers):
   for generic_handler in generic_handlers:
     method_handler = generic_handler.service(
         _HandlerCallDetails(
-            rpc_event.request_call_details.method, rpc_event.request_metadata))
+            _common.decode(rpc_event.request_call_details.method),
+            rpc_event.request_metadata))
     if method_handler is not None:
       return method_handler
   else:
@@ -545,7 +547,7 @@ def _handle_unrecognized_method(rpc_event):
       cygrpc.operation_receive_close_on_server(_EMPTY_FLAGS),
       cygrpc.operation_send_status_from_server(
           _EMPTY_METADATA, cygrpc.StatusCode.unimplemented,
-          'Method not found!', _EMPTY_FLAGS),
+          b'Method not found!', _EMPTY_FLAGS),
   )
   rpc_state = _RPCState()
   rpc_event.operation_call.start_batch(
@@ -740,10 +742,10 @@ class Server(grpc.Server):
     _add_generic_handlers(self._state, generic_rpc_handlers)
 
   def add_insecure_port(self, address):
-    return _add_insecure_port(self._state, address)
+    return _add_insecure_port(self._state, _common.encode(address))
 
   def add_secure_port(self, address, server_credentials):
-    return _add_secure_port(self._state, address, server_credentials)
+    return _add_secure_port(self._state, _common.encode(address), server_credentials)
 
   def start(self):
     _start(self._state)
diff --git a/src/python/grpcio/grpc/beta/_server_adaptations.py b/src/python/grpcio/grpc/beta/_server_adaptations.py
index c695434dacf..1e1f80156ac 100644
--- a/src/python/grpcio/grpc/beta/_server_adaptations.py
+++ b/src/python/grpcio/grpc/beta/_server_adaptations.py
@@ -79,7 +79,8 @@ class _FaceServicerContext(face.ServicerContext):
     return _ServerProtocolContext(self._servicer_context)
 
   def invocation_metadata(self):
-    return self._servicer_context.invocation_metadata()
+    return _common.cygrpc_metadata(
+        self._servicer_context.invocation_metadata())
 
   def initial_metadata(self, initial_metadata):
     self._servicer_context.send_initial_metadata(initial_metadata)
diff --git a/src/python/grpcio/tests/unit/_compression_test.py b/src/python/grpcio/tests/unit/_compression_test.py
index 6eddb6f83f3..9e8b8578c1e 100644
--- a/src/python/grpcio/tests/unit/_compression_test.py
+++ b/src/python/grpcio/tests/unit/_compression_test.py
@@ -37,8 +37,8 @@ from grpc.framework.foundation import logging_pool
 from tests.unit import test_common
 from tests.unit.framework.common import test_constants
 
-_UNARY_UNARY = b'/test/UnaryUnary'
-_STREAM_STREAM = b'/test/StreamStream'
+_UNARY_UNARY = '/test/UnaryUnary'
+_STREAM_STREAM = '/test/StreamStream'
 
 
 def handle_unary(request, servicer_context):
diff --git a/src/python/grpcio/tests/unit/_cython/_cancel_many_calls_test.py b/src/python/grpcio/tests/unit/_cython/_cancel_many_calls_test.py
index c1de7790145..cac0c8b3b93 100644
--- a/src/python/grpcio/tests/unit/_cython/_cancel_many_calls_test.py
+++ b/src/python/grpcio/tests/unit/_cython/_cancel_many_calls_test.py
@@ -159,9 +159,9 @@ class CancelManyCallsTest(unittest.TestCase):
     server_completion_queue = cygrpc.CompletionQueue()
     server = cygrpc.Server()
     server.register_completion_queue(server_completion_queue)
-    port = server.add_http2_port('[::]:0')
+    port = server.add_http2_port(b'[::]:0')
     server.start()
-    channel = cygrpc.Channel('localhost:{}'.format(port))
+    channel = cygrpc.Channel('localhost:{}'.format(port).encode())
 
     state = _State()
 
diff --git a/src/python/grpcio/tests/unit/_cython/_channel_test.py b/src/python/grpcio/tests/unit/_cython/_channel_test.py
index 3dc7a246aee..f9c8a3ac62b 100644
--- a/src/python/grpcio/tests/unit/_cython/_channel_test.py
+++ b/src/python/grpcio/tests/unit/_cython/_channel_test.py
@@ -37,7 +37,7 @@ from tests.unit.framework.common import test_constants
 
 
 def _channel_and_completion_queue():
-  channel = cygrpc.Channel('localhost:54321', cygrpc.ChannelArgs(()))
+  channel = cygrpc.Channel(b'localhost:54321', cygrpc.ChannelArgs(()))
   completion_queue = cygrpc.CompletionQueue()
   return channel, completion_queue
 
diff --git a/src/python/grpcio/tests/unit/_cython/_read_some_but_not_all_responses_test.py b/src/python/grpcio/tests/unit/_cython/_read_some_but_not_all_responses_test.py
index 6ae7a90fbed..27fcee0d6f1 100644
--- a/src/python/grpcio/tests/unit/_cython/_read_some_but_not_all_responses_test.py
+++ b/src/python/grpcio/tests/unit/_cython/_read_some_but_not_all_responses_test.py
@@ -126,9 +126,9 @@ class ReadSomeButNotAllResponsesTest(unittest.TestCase):
     server_completion_queue = cygrpc.CompletionQueue()
     server = cygrpc.Server()
     server.register_completion_queue(server_completion_queue)
-    port = server.add_http2_port('[::]:0')
+    port = server.add_http2_port(b'[::]:0')
     server.start()
-    channel = cygrpc.Channel('localhost:{}'.format(port))
+    channel = cygrpc.Channel('localhost:{}'.format(port).encode())
 
     server_shutdown_tag = 'server_shutdown_tag'
     server_driver = _ServerDriver(server_completion_queue, server_shutdown_tag)
diff --git a/src/python/grpcio/tests/unit/_cython/cygrpc_test.py b/src/python/grpcio/tests/unit/_cython/cygrpc_test.py
index a006a20ce3f..b740695e35b 100644
--- a/src/python/grpcio/tests/unit/_cython/cygrpc_test.py
+++ b/src/python/grpcio/tests/unit/_cython/cygrpc_test.py
@@ -46,38 +46,38 @@ def _metadata_plugin_callback(context, callback):
   callback(cygrpc.Metadata(
       [cygrpc.Metadatum(_CALL_CREDENTIALS_METADATA_KEY,
                         _CALL_CREDENTIALS_METADATA_VALUE)]),
-      cygrpc.StatusCode.ok, '')
+      cygrpc.StatusCode.ok, b'')
 
 
 class TypeSmokeTest(unittest.TestCase):
 
   def testStringsInUtilitiesUpDown(self):
     self.assertEqual(0, cygrpc.StatusCode.ok)
-    metadatum = cygrpc.Metadatum('a', 'b')
-    self.assertEqual('a'.encode(), metadatum.key)
-    self.assertEqual('b'.encode(), metadatum.value)
+    metadatum = cygrpc.Metadatum(b'a', b'b')
+    self.assertEqual(b'a', metadatum.key)
+    self.assertEqual(b'b', metadatum.value)
     metadata = cygrpc.Metadata([metadatum])
     self.assertEqual(1, len(metadata))
     self.assertEqual(metadatum.key, metadata[0].key)
 
   def testMetadataIteration(self):
     metadata = cygrpc.Metadata([
-        cygrpc.Metadatum('a', 'b'), cygrpc.Metadatum('c', 'd')])
+        cygrpc.Metadatum(b'a', b'b'), cygrpc.Metadatum(b'c', b'd')])
     iterator = iter(metadata)
     metadatum = next(iterator)
     self.assertIsInstance(metadatum, cygrpc.Metadatum)
-    self.assertEqual(metadatum.key, 'a'.encode())
-    self.assertEqual(metadatum.value, 'b'.encode())
+    self.assertEqual(metadatum.key, b'a')
+    self.assertEqual(metadatum.value, b'b')
     metadatum = next(iterator)
     self.assertIsInstance(metadatum, cygrpc.Metadatum)
-    self.assertEqual(metadatum.key, 'c'.encode())
-    self.assertEqual(metadatum.value, 'd'.encode())
+    self.assertEqual(metadatum.key, b'c')
+    self.assertEqual(metadatum.value, b'd')
     with self.assertRaises(StopIteration):
       next(iterator)
 
   def testOperationsIteration(self):
     operations = cygrpc.Operations([
-        cygrpc.operation_send_message('asdf', _EMPTY_FLAGS)])
+        cygrpc.operation_send_message(b'asdf', _EMPTY_FLAGS)])
     iterator = iter(operations)
     operation = next(iterator)
     self.assertIsInstance(operation, cygrpc.Operation)
@@ -87,7 +87,7 @@ class TypeSmokeTest(unittest.TestCase):
       next(iterator)
 
   def testOperationFlags(self):
-    operation = cygrpc.operation_send_message('asdf',
+    operation = cygrpc.operation_send_message(b'asdf',
                                               cygrpc.WriteFlag.no_compress)
     self.assertEqual(cygrpc.WriteFlag.no_compress, operation.flags)
 
@@ -105,16 +105,16 @@ class TypeSmokeTest(unittest.TestCase):
     del server
 
   def testChannelUpDown(self):
-    channel = cygrpc.Channel('[::]:0', cygrpc.ChannelArgs([]))
+    channel = cygrpc.Channel(b'[::]:0', cygrpc.ChannelArgs([]))
     del channel
 
   def testCredentialsMetadataPluginUpDown(self):
     plugin = cygrpc.CredentialsMetadataPlugin(
-        lambda ignored_a, ignored_b: None, '')
+        lambda ignored_a, ignored_b: None, b'')
     del plugin
 
   def testCallCredentialsFromPluginUpDown(self):
-    plugin = cygrpc.CredentialsMetadataPlugin(_metadata_plugin_callback, '')
+    plugin = cygrpc.CredentialsMetadataPlugin(_metadata_plugin_callback, b'')
     call_credentials = cygrpc.call_credentials_metadata_plugin(plugin)
     del plugin
     del call_credentials
@@ -123,7 +123,7 @@ class TypeSmokeTest(unittest.TestCase):
     server = cygrpc.Server()
     completion_queue = cygrpc.CompletionQueue()
     server.register_completion_queue(completion_queue)
-    port = server.add_http2_port('[::]:0')
+    port = server.add_http2_port(b'[::]:0')
     self.assertIsInstance(port, int)
     server.start()
     del server
@@ -131,7 +131,7 @@ class TypeSmokeTest(unittest.TestCase):
   def testServerStartShutdown(self):
     completion_queue = cygrpc.CompletionQueue()
     server = cygrpc.Server()
-    server.add_http2_port('[::]:0')
+    server.add_http2_port(b'[::]:0')
     server.register_completion_queue(completion_queue)
     server.start()
     shutdown_tag = object()
@@ -150,9 +150,9 @@ class ServerClientMixin(object):
     self.server = cygrpc.Server()
     self.server.register_completion_queue(self.server_completion_queue)
     if server_credentials:
-      self.port = self.server.add_http2_port('[::]:0', server_credentials)
+      self.port = self.server.add_http2_port(b'[::]:0', server_credentials)
     else:
-      self.port = self.server.add_http2_port('[::]:0')
+      self.port = self.server.add_http2_port(b'[::]:0')
     self.server.start()
     self.client_completion_queue = cygrpc.CompletionQueue()
     if client_credentials:
@@ -160,10 +160,10 @@ class ServerClientMixin(object):
           cygrpc.ChannelArg(cygrpc.ChannelArgKey.ssl_target_name_override,
                             host_override)])
       self.client_channel = cygrpc.Channel(
-          'localhost:{}'.format(self.port), client_channel_arguments,
+          'localhost:{}'.format(self.port).encode(), client_channel_arguments,
           client_credentials)
     else:
-      self.client_channel = cygrpc.Channel('localhost:{}'.format(self.port))
+      self.client_channel = cygrpc.Channel('localhost:{}'.format(self.port).encode())
     if host_override:
       self.host_argument = None  # default host
       self.expected_host = host_override
diff --git a/src/python/grpcio/tests/unit/_empty_message_test.py b/src/python/grpcio/tests/unit/_empty_message_test.py
index f324f6216b7..8c7d697728b 100644
--- a/src/python/grpcio/tests/unit/_empty_message_test.py
+++ b/src/python/grpcio/tests/unit/_empty_message_test.py
@@ -37,10 +37,10 @@ from tests.unit.framework.common import test_constants
 _REQUEST = b''
 _RESPONSE = b''
 
-_UNARY_UNARY = b'/test/UnaryUnary'
-_UNARY_STREAM = b'/test/UnaryStream'
-_STREAM_UNARY = b'/test/StreamUnary'
-_STREAM_STREAM = b'/test/StreamStream'
+_UNARY_UNARY = '/test/UnaryUnary'
+_UNARY_STREAM = '/test/UnaryStream'
+_STREAM_UNARY = '/test/StreamUnary'
+_STREAM_STREAM = '/test/StreamStream'
 
 
 def handle_unary_unary(request, servicer_context):
diff --git a/src/python/grpcio/tests/unit/_metadata_code_details_test.py b/src/python/grpcio/tests/unit/_metadata_code_details_test.py
index dd74268cbf1..0fd02d2a227 100644
--- a/src/python/grpcio/tests/unit/_metadata_code_details_test.py
+++ b/src/python/grpcio/tests/unit/_metadata_code_details_test.py
@@ -47,29 +47,29 @@ _REQUEST_DESERIALIZER = lambda unused_serialized_request: object()
 _RESPONSE_SERIALIZER = lambda unused_response: _SERIALIZED_RESPONSE
 _RESPONSE_DESERIALIZER = lambda unused_serialized_resopnse: object()
 
-_SERVICE = b'test.TestService'
-_UNARY_UNARY = b'UnaryUnary'
-_UNARY_STREAM = b'UnaryStream'
-_STREAM_UNARY = b'StreamUnary'
-_STREAM_STREAM = b'StreamStream'
+_SERVICE = 'test.TestService'
+_UNARY_UNARY = 'UnaryUnary'
+_UNARY_STREAM = 'UnaryStream'
+_STREAM_UNARY = 'StreamUnary'
+_STREAM_STREAM = 'StreamStream'
 
 _CLIENT_METADATA = (
-    (b'client-md-key', b'client-md-key'),
-    (b'client-md-key-bin', b'\x00\x01')
+    ('client-md-key', 'client-md-key'),
+    ('client-md-key-bin', b'\x00\x01')
 )
 
 _SERVER_INITIAL_METADATA = (
-    (b'server-initial-md-key', b'server-initial-md-value'),
-    (b'server-initial-md-key-bin', b'\x00\x02')
+    ('server-initial-md-key', 'server-initial-md-value'),
+    ('server-initial-md-key-bin', b'\x00\x02')
 )
 
 _SERVER_TRAILING_METADATA = (
-    (b'server-trailing-md-key', b'server-trailing-md-value'),
-    (b'server-trailing-md-key-bin', b'\x00\x03')
+    ('server-trailing-md-key', 'server-trailing-md-value'),
+    ('server-trailing-md-key-bin', b'\x00\x03')
 )
 
 _NON_OK_CODE = grpc.StatusCode.NOT_FOUND
-_DETAILS = b'Test details!'
+_DETAILS = 'Test details!'
 
 
 class _Servicer(object):
@@ -195,15 +195,15 @@ class MetadataCodeDetailsTest(unittest.TestCase):
 
     channel = grpc.insecure_channel('localhost:{}'.format(port))
     self._unary_unary = channel.unary_unary(
-        b'/'.join((b'', _SERVICE, _UNARY_UNARY,)),
+        '/'.join(('', _SERVICE, _UNARY_UNARY,)),
         request_serializer=_REQUEST_SERIALIZER,
         response_deserializer=_RESPONSE_DESERIALIZER,)
     self._unary_stream = channel.unary_stream(
-        b'/'.join((b'', _SERVICE, _UNARY_STREAM,)),)
+        '/'.join(('', _SERVICE, _UNARY_STREAM,)),)
     self._stream_unary = channel.stream_unary(
-        b'/'.join((b'', _SERVICE, _STREAM_UNARY,)),)
+        '/'.join(('', _SERVICE, _STREAM_UNARY,)),)
     self._stream_stream = channel.stream_stream(
-        b'/'.join((b'', _SERVICE, _STREAM_STREAM,)),
+        '/'.join(('', _SERVICE, _STREAM_STREAM,)),
         request_serializer=_REQUEST_SERIALIZER,
         response_deserializer=_RESPONSE_DESERIALIZER,)
 
diff --git a/src/python/grpcio/tests/unit/_metadata_test.py b/src/python/grpcio/tests/unit/_metadata_test.py
index 2cb13f236bd..c637a28039d 100644
--- a/src/python/grpcio/tests/unit/_metadata_test.py
+++ b/src/python/grpcio/tests/unit/_metadata_test.py
@@ -44,33 +44,33 @@ _CHANNEL_ARGS = (('grpc.primary_user_agent', 'primary-agent'),
 _REQUEST = b'\x00\x00\x00'
 _RESPONSE = b'\x00\x00\x00'
 
-_UNARY_UNARY = b'/test/UnaryUnary'
-_UNARY_STREAM = b'/test/UnaryStream'
-_STREAM_UNARY = b'/test/StreamUnary'
-_STREAM_STREAM = b'/test/StreamStream'
+_UNARY_UNARY = '/test/UnaryUnary'
+_UNARY_STREAM = '/test/UnaryStream'
+_STREAM_UNARY = '/test/StreamUnary'
+_STREAM_STREAM = '/test/StreamStream'
 
 _USER_AGENT = 'Python-gRPC-{}'.format(_grpcio_metadata.__version__)
 
 _CLIENT_METADATA = (
-    (b'client-md-key', b'client-md-key'),
-    (b'client-md-key-bin', b'\x00\x01')
+    ('client-md-key', 'client-md-key'),
+    ('client-md-key-bin', b'\x00\x01')
 )
 
 _SERVER_INITIAL_METADATA = (
-    (b'server-initial-md-key', b'server-initial-md-value'),
-    (b'server-initial-md-key-bin', b'\x00\x02')
+    ('server-initial-md-key', 'server-initial-md-value'),
+    ('server-initial-md-key-bin', b'\x00\x02')
 )
 
 _SERVER_TRAILING_METADATA = (
-    (b'server-trailing-md-key', b'server-trailing-md-value'),
-    (b'server-trailing-md-key-bin', b'\x00\x03')
+    ('server-trailing-md-key', 'server-trailing-md-value'),
+    ('server-trailing-md-key-bin', b'\x00\x03')
 )
 
 
 def user_agent(metadata):
   for key, val in metadata:
-    if key == b'user-agent':
-      return val.decode('ascii')
+    if key == 'user-agent':
+      return val
   raise KeyError('No user agent!')
 
 
diff --git a/src/python/grpcio/tests/unit/_rpc_test.py b/src/python/grpcio/tests/unit/_rpc_test.py
index 9814504edff..c70d65a6dfb 100644
--- a/src/python/grpcio/tests/unit/_rpc_test.py
+++ b/src/python/grpcio/tests/unit/_rpc_test.py
@@ -45,10 +45,10 @@ _DESERIALIZE_REQUEST = lambda bytestring: bytestring[len(bytestring) // 2:]
 _SERIALIZE_RESPONSE = lambda bytestring: bytestring * 3
 _DESERIALIZE_RESPONSE = lambda bytestring: bytestring[:len(bytestring) // 3]
 
-_UNARY_UNARY = b'/test/UnaryUnary'
-_UNARY_STREAM = b'/test/UnaryStream'
-_STREAM_UNARY = b'/test/StreamUnary'
-_STREAM_STREAM = b'/test/StreamStream'
+_UNARY_UNARY = '/test/UnaryUnary'
+_UNARY_STREAM = '/test/UnaryStream'
+_STREAM_UNARY = '/test/StreamUnary'
+_STREAM_STREAM = '/test/StreamStream'
 
 
 class _Callback(object):
@@ -79,7 +79,7 @@ class _Handler(object):
   def handle_unary_unary(self, request, servicer_context):
     self._control.control()
     if servicer_context is not None:
-      servicer_context.set_trailing_metadata(((b'testkey', b'testvalue',),))
+      servicer_context.set_trailing_metadata((('testkey', 'testvalue',),))
     return request
 
   def handle_unary_stream(self, request, servicer_context):
@@ -88,7 +88,7 @@ class _Handler(object):
       yield request
     self._control.control()
     if servicer_context is not None:
-      servicer_context.set_trailing_metadata(((b'testkey', b'testvalue',),))
+      servicer_context.set_trailing_metadata((('testkey', 'testvalue',),))
 
   def handle_stream_unary(self, request_iterator, servicer_context):
     if servicer_context is not None:
@@ -100,13 +100,13 @@ class _Handler(object):
       response_elements.append(request)
     self._control.control()
     if servicer_context is not None:
-      servicer_context.set_trailing_metadata(((b'testkey', b'testvalue',),))
+      servicer_context.set_trailing_metadata((('testkey', 'testvalue',),))
     return b''.join(response_elements)
 
   def handle_stream_stream(self, request_iterator, servicer_context):
     self._control.control()
     if servicer_context is not None:
-      servicer_context.set_trailing_metadata(((b'testkey', b'testvalue',),))
+      servicer_context.set_trailing_metadata((('testkey', 'testvalue',),))
     for request in request_iterator:
       self._control.control()
       yield request
@@ -185,7 +185,7 @@ class RPCTest(unittest.TestCase):
     self._server_pool = logging_pool.pool(test_constants.THREAD_CONCURRENCY)
 
     self._server = grpc.server((), self._server_pool)
-    port = self._server.add_insecure_port(b'[::]:0')
+    port = self._server.add_insecure_port('[::]:0')
     self._server.add_generic_rpc_handlers((_GenericHandler(self._handler),))
     self._server.start()
 
@@ -195,7 +195,7 @@ class RPCTest(unittest.TestCase):
     request = b'abc'
 
     with self.assertRaises(grpc.RpcError) as exception_context:
-      self._channel.unary_unary(b'NoSuchMethod')(request)
+      self._channel.unary_unary('NoSuchMethod')(request)
 
     self.assertEqual(
         grpc.StatusCode.UNIMPLEMENTED, exception_context.exception.code())
@@ -207,7 +207,7 @@ class RPCTest(unittest.TestCase):
     multi_callable = _unary_unary_multi_callable(self._channel)
     response = multi_callable(
         request, metadata=(
-            (b'test', b'SuccessfulUnaryRequestBlockingUnaryResponse'),))
+            ('test', 'SuccessfulUnaryRequestBlockingUnaryResponse'),))
 
     self.assertEqual(expected_response, response)
 
@@ -218,7 +218,7 @@ class RPCTest(unittest.TestCase):
     multi_callable = _unary_unary_multi_callable(self._channel)
     response, call = multi_callable.with_call(
         request, metadata=(
-            (b'test', b'SuccessfulUnaryRequestBlockingUnaryResponseWithCall'),))
+            ('test', 'SuccessfulUnaryRequestBlockingUnaryResponseWithCall'),))
 
     self.assertEqual(expected_response, response)
     self.assertIs(grpc.StatusCode.OK, call.code())
@@ -230,7 +230,7 @@ class RPCTest(unittest.TestCase):
     multi_callable = _unary_unary_multi_callable(self._channel)
     response_future = multi_callable.future(
         request, metadata=(
-            (b'test', b'SuccessfulUnaryRequestFutureUnaryResponse'),))
+            ('test', 'SuccessfulUnaryRequestFutureUnaryResponse'),))
     response = response_future.result()
 
     self.assertEqual(expected_response, response)
@@ -242,7 +242,7 @@ class RPCTest(unittest.TestCase):
     multi_callable = _unary_stream_multi_callable(self._channel)
     response_iterator = multi_callable(
         request,
-        metadata=((b'test', b'SuccessfulUnaryRequestStreamResponse'),))
+        metadata=(('test', 'SuccessfulUnaryRequestStreamResponse'),))
     responses = tuple(response_iterator)
 
     self.assertSequenceEqual(expected_responses, responses)
@@ -255,7 +255,7 @@ class RPCTest(unittest.TestCase):
     multi_callable = _stream_unary_multi_callable(self._channel)
     response = multi_callable(
         request_iterator,
-        metadata=((b'test', b'SuccessfulStreamRequestBlockingUnaryResponse'),))
+        metadata=(('test', 'SuccessfulStreamRequestBlockingUnaryResponse'),))
 
     self.assertEqual(expected_response, response)
 
@@ -268,7 +268,7 @@ class RPCTest(unittest.TestCase):
     response, call = multi_callable.with_call(
         request_iterator,
         metadata=(
-            (b'test', b'SuccessfulStreamRequestBlockingUnaryResponseWithCall'),
+            ('test', 'SuccessfulStreamRequestBlockingUnaryResponseWithCall'),
         ))
 
     self.assertEqual(expected_response, response)
@@ -283,7 +283,7 @@ class RPCTest(unittest.TestCase):
     response_future = multi_callable.future(
         request_iterator,
         metadata=(
-            (b'test', b'SuccessfulStreamRequestFutureUnaryResponse'),))
+            ('test', 'SuccessfulStreamRequestFutureUnaryResponse'),))
     response = response_future.result()
 
     self.assertEqual(expected_response, response)
@@ -297,7 +297,7 @@ class RPCTest(unittest.TestCase):
     multi_callable = _stream_stream_multi_callable(self._channel)
     response_iterator = multi_callable(
         request_iterator,
-        metadata=((b'test', b'SuccessfulStreamRequestStreamResponse'),))
+        metadata=(('test', 'SuccessfulStreamRequestStreamResponse'),))
     responses = tuple(response_iterator)
 
     self.assertSequenceEqual(expected_responses, responses)
@@ -312,9 +312,9 @@ class RPCTest(unittest.TestCase):
 
     multi_callable = _unary_unary_multi_callable(self._channel)
     first_response = multi_callable(
-        first_request, metadata=((b'test', b'SequentialInvocations'),))
+        first_request, metadata=(('test', 'SequentialInvocations'),))
     second_response = multi_callable(
-        second_request, metadata=((b'test', b'SequentialInvocations'),))
+        second_request, metadata=(('test', 'SequentialInvocations'),))
 
     self.assertEqual(expected_first_response, first_response)
     self.assertEqual(expected_second_response, second_response)
@@ -331,7 +331,7 @@ class RPCTest(unittest.TestCase):
       request_iterator = iter(requests)
       response_future = pool.submit(
           multi_callable, request_iterator,
-          metadata=((b'test', b'ConcurrentBlockingInvocations'),))
+          metadata=(('test', 'ConcurrentBlockingInvocations'),))
       response_futures[index] = response_future
     responses = tuple(
         response_future.result() for response_future in response_futures)
@@ -350,7 +350,7 @@ class RPCTest(unittest.TestCase):
       request_iterator = iter(requests)
       response_future = multi_callable.future(
           request_iterator,
-          metadata=((b'test', b'ConcurrentFutureInvocations'),))
+          metadata=(('test', 'ConcurrentFutureInvocations'),))
       response_futures[index] = response_future
     responses = tuple(
         response_future.result() for response_future in response_futures)
@@ -380,8 +380,8 @@ class RPCTest(unittest.TestCase):
       inner_response_future = multi_callable.future(
           request,
           metadata=(
-              (b'test',
-               b'WaitingForSomeButNotAllConcurrentFutureInvocations'),))
+              ('test',
+               'WaitingForSomeButNotAllConcurrentFutureInvocations'),))
       outer_response_future = pool.submit(wrap_future(inner_response_future))
       response_futures[index] = outer_response_future
 
@@ -400,7 +400,7 @@ class RPCTest(unittest.TestCase):
     response_iterator = multi_callable(
         request,
         metadata=(
-            (b'test', b'ConsumingOneStreamResponseUnaryRequest'),))
+            ('test', 'ConsumingOneStreamResponseUnaryRequest'),))
     next(response_iterator)
 
   def testConsumingSomeButNotAllStreamResponsesUnaryRequest(self):
@@ -410,7 +410,7 @@ class RPCTest(unittest.TestCase):
     response_iterator = multi_callable(
         request,
         metadata=(
-            (b'test', b'ConsumingSomeButNotAllStreamResponsesUnaryRequest'),))
+            ('test', 'ConsumingSomeButNotAllStreamResponsesUnaryRequest'),))
     for _ in range(test_constants.STREAM_LENGTH // 2):
       next(response_iterator)
 
@@ -422,7 +422,7 @@ class RPCTest(unittest.TestCase):
     response_iterator = multi_callable(
         request_iterator,
         metadata=(
-            (b'test', b'ConsumingSomeButNotAllStreamResponsesStreamRequest'),))
+            ('test', 'ConsumingSomeButNotAllStreamResponsesStreamRequest'),))
     for _ in range(test_constants.STREAM_LENGTH // 2):
       next(response_iterator)
 
@@ -434,7 +434,7 @@ class RPCTest(unittest.TestCase):
     response_iterator = multi_callable(
         request_iterator,
         metadata=(
-            (b'test', b'ConsumingTooManyStreamResponsesStreamRequest'),))
+            ('test', 'ConsumingTooManyStreamResponsesStreamRequest'),))
     for _ in range(test_constants.STREAM_LENGTH):
       next(response_iterator)
     for _ in range(test_constants.STREAM_LENGTH):
@@ -453,7 +453,7 @@ class RPCTest(unittest.TestCase):
     with self._control.pause():
       response_future = multi_callable.future(
           request,
-          metadata=((b'test', b'CancelledUnaryRequestUnaryResponse'),))
+          metadata=(('test', 'CancelledUnaryRequestUnaryResponse'),))
       response_future.cancel()
 
     self.assertTrue(response_future.cancelled())
@@ -468,7 +468,7 @@ class RPCTest(unittest.TestCase):
     with self._control.pause():
       response_iterator = multi_callable(
           request,
-          metadata=((b'test', b'CancelledUnaryRequestStreamResponse'),))
+          metadata=(('test', 'CancelledUnaryRequestStreamResponse'),))
       self._control.block_until_paused()
       response_iterator.cancel()
 
@@ -488,7 +488,7 @@ class RPCTest(unittest.TestCase):
     with self._control.pause():
       response_future = multi_callable.future(
           request_iterator,
-          metadata=((b'test', b'CancelledStreamRequestUnaryResponse'),))
+          metadata=(('test', 'CancelledStreamRequestUnaryResponse'),))
       self._control.block_until_paused()
       response_future.cancel()
 
@@ -508,7 +508,7 @@ class RPCTest(unittest.TestCase):
     with self._control.pause():
       response_iterator = multi_callable(
           request_iterator,
-          metadata=((b'test', b'CancelledStreamRequestStreamResponse'),))
+          metadata=(('test', 'CancelledStreamRequestStreamResponse'),))
       response_iterator.cancel()
 
     with self.assertRaises(grpc.RpcError):
@@ -526,7 +526,7 @@ class RPCTest(unittest.TestCase):
       with self.assertRaises(grpc.RpcError) as exception_context:
         multi_callable.with_call(
             request, timeout=test_constants.SHORT_TIMEOUT,
-            metadata=((b'test', b'ExpiredUnaryRequestBlockingUnaryResponse'),))
+            metadata=(('test', 'ExpiredUnaryRequestBlockingUnaryResponse'),))
 
     self.assertIsNotNone(exception_context.exception.initial_metadata())
     self.assertIs(
@@ -542,7 +542,7 @@ class RPCTest(unittest.TestCase):
     with self._control.pause():
       response_future = multi_callable.future(
           request, timeout=test_constants.SHORT_TIMEOUT,
-          metadata=((b'test', b'ExpiredUnaryRequestFutureUnaryResponse'),))
+          metadata=(('test', 'ExpiredUnaryRequestFutureUnaryResponse'),))
       response_future.add_done_callback(callback)
       value_passed_to_callback = callback.value()
 
@@ -567,7 +567,7 @@ class RPCTest(unittest.TestCase):
       with self.assertRaises(grpc.RpcError) as exception_context:
         response_iterator = multi_callable(
             request, timeout=test_constants.SHORT_TIMEOUT,
-            metadata=((b'test', b'ExpiredUnaryRequestStreamResponse'),))
+            metadata=(('test', 'ExpiredUnaryRequestStreamResponse'),))
         next(response_iterator)
 
     self.assertIs(
@@ -583,7 +583,7 @@ class RPCTest(unittest.TestCase):
       with self.assertRaises(grpc.RpcError) as exception_context:
         multi_callable(
             request_iterator, timeout=test_constants.SHORT_TIMEOUT,
-            metadata=((b'test', b'ExpiredStreamRequestBlockingUnaryResponse'),))
+            metadata=(('test', 'ExpiredStreamRequestBlockingUnaryResponse'),))
 
     self.assertIsNotNone(exception_context.exception.initial_metadata())
     self.assertIs(
@@ -600,7 +600,7 @@ class RPCTest(unittest.TestCase):
     with self._control.pause():
       response_future = multi_callable.future(
           request_iterator, timeout=test_constants.SHORT_TIMEOUT,
-          metadata=((b'test', b'ExpiredStreamRequestFutureUnaryResponse'),))
+          metadata=(('test', 'ExpiredStreamRequestFutureUnaryResponse'),))
       response_future.add_done_callback(callback)
       value_passed_to_callback = callback.value()
 
@@ -625,7 +625,7 @@ class RPCTest(unittest.TestCase):
       with self.assertRaises(grpc.RpcError) as exception_context:
         response_iterator = multi_callable(
             request_iterator, timeout=test_constants.SHORT_TIMEOUT,
-            metadata=((b'test', b'ExpiredStreamRequestStreamResponse'),))
+            metadata=(('test', 'ExpiredStreamRequestStreamResponse'),))
         next(response_iterator)
 
     self.assertIs(
@@ -640,7 +640,7 @@ class RPCTest(unittest.TestCase):
       with self.assertRaises(grpc.RpcError) as exception_context:
         multi_callable.with_call(
             request,
-            metadata=((b'test', b'FailedUnaryRequestBlockingUnaryResponse'),))
+            metadata=(('test', 'FailedUnaryRequestBlockingUnaryResponse'),))
 
     self.assertIs(grpc.StatusCode.UNKNOWN, exception_context.exception.code())
 
@@ -652,7 +652,7 @@ class RPCTest(unittest.TestCase):
     with self._control.fail():
       response_future = multi_callable.future(
           request,
-          metadata=((b'test', b'FailedUnaryRequestFutureUnaryResponse'),))
+          metadata=(('test', 'FailedUnaryRequestFutureUnaryResponse'),))
       response_future.add_done_callback(callback)
       value_passed_to_callback = callback.value()
 
@@ -672,7 +672,7 @@ class RPCTest(unittest.TestCase):
       with self._control.fail():
         response_iterator = multi_callable(
             request,
-            metadata=((b'test', b'FailedUnaryRequestStreamResponse'),))
+            metadata=(('test', 'FailedUnaryRequestStreamResponse'),))
         next(response_iterator)
 
     self.assertIs(grpc.StatusCode.UNKNOWN, exception_context.exception.code())
@@ -686,7 +686,7 @@ class RPCTest(unittest.TestCase):
       with self.assertRaises(grpc.RpcError) as exception_context:
         multi_callable(
             request_iterator,
-            metadata=((b'test', b'FailedStreamRequestBlockingUnaryResponse'),))
+            metadata=(('test', 'FailedStreamRequestBlockingUnaryResponse'),))
 
     self.assertIs(grpc.StatusCode.UNKNOWN, exception_context.exception.code())
 
@@ -699,7 +699,7 @@ class RPCTest(unittest.TestCase):
     with self._control.fail():
       response_future = multi_callable.future(
           request_iterator,
-          metadata=((b'test', b'FailedStreamRequestFutureUnaryResponse'),))
+          metadata=(('test', 'FailedStreamRequestFutureUnaryResponse'),))
       response_future.add_done_callback(callback)
       value_passed_to_callback = callback.value()
 
@@ -720,7 +720,7 @@ class RPCTest(unittest.TestCase):
       with self.assertRaises(grpc.RpcError) as exception_context:
         response_iterator = multi_callable(
             request_iterator,
-            metadata=((b'test', b'FailedStreamRequestStreamResponse'),))
+            metadata=(('test', 'FailedStreamRequestStreamResponse'),))
         tuple(response_iterator)
 
     self.assertIs(grpc.StatusCode.UNKNOWN, exception_context.exception.code())
@@ -732,7 +732,7 @@ class RPCTest(unittest.TestCase):
     multi_callable = _unary_unary_multi_callable(self._channel)
     multi_callable.future(
         request,
-        metadata=((b'test', b'IgnoredUnaryRequestFutureUnaryResponse'),))
+        metadata=(('test', 'IgnoredUnaryRequestFutureUnaryResponse'),))
 
   def testIgnoredUnaryRequestStreamResponse(self):
     request = b'\x37\x17'
@@ -740,7 +740,7 @@ class RPCTest(unittest.TestCase):
     multi_callable = _unary_stream_multi_callable(self._channel)
     multi_callable(
         request,
-        metadata=((b'test', b'IgnoredUnaryRequestStreamResponse'),))
+        metadata=(('test', 'IgnoredUnaryRequestStreamResponse'),))
 
   def testIgnoredStreamRequestFutureUnaryResponse(self):
     requests = tuple(b'\x07\x18' for _ in range(test_constants.STREAM_LENGTH))
@@ -749,7 +749,7 @@ class RPCTest(unittest.TestCase):
     multi_callable = _stream_unary_multi_callable(self._channel)
     multi_callable.future(
         request_iterator,
-        metadata=((b'test', b'IgnoredStreamRequestFutureUnaryResponse'),))
+        metadata=(('test', 'IgnoredStreamRequestFutureUnaryResponse'),))
 
   def testIgnoredStreamRequestStreamResponse(self):
     requests = tuple(b'\x67\x88' for _ in range(test_constants.STREAM_LENGTH))
@@ -758,7 +758,7 @@ class RPCTest(unittest.TestCase):
     multi_callable = _stream_stream_multi_callable(self._channel)
     multi_callable(
         request_iterator,
-        metadata=((b'test', b'IgnoredStreamRequestStreamResponse'),))
+        metadata=(('test', 'IgnoredStreamRequestStreamResponse'),))
 
 
 if __name__ == '__main__':
diff --git a/src/python/grpcio/tests/unit/beta/_utilities_test.py b/src/python/grpcio/tests/unit/beta/_utilities_test.py
index 08ce98e7516..90fe10c77ce 100644
--- a/src/python/grpcio/tests/unit/beta/_utilities_test.py
+++ b/src/python/grpcio/tests/unit/beta/_utilities_test.py
@@ -33,21 +33,12 @@ import threading
 import time
 import unittest
 
-from grpc._adapter import _low
-from grpc._adapter import _types
 from grpc.beta import implementations
 from grpc.beta import utilities
 from grpc.framework.foundation import future
 from tests.unit.framework.common import test_constants
 
 
-def _drive_completion_queue(completion_queue):
-  while True:
-    event = completion_queue.next(time.time() + 24 * 60 * 60)
-    if event.type == _types.EventType.QUEUE_SHUTDOWN:
-      break
-
-
 class _Callback(object):
 
   def __init__(self):
@@ -87,13 +78,9 @@ class ChannelConnectivityTest(unittest.TestCase):
     self.assertFalse(ready_future.running())
 
   def test_immediately_connectable_channel_connectivity(self):
-    server_completion_queue = _low.CompletionQueue()
-    server = _low.Server(server_completion_queue, [])
-    port = server.add_http2_port('[::]:0')
+    server = implementations.server({})
+    port = server.add_insecure_port('[::]:0')
     server.start()
-    server_completion_queue_thread = threading.Thread(
-        target=_drive_completion_queue, args=(server_completion_queue,))
-    server_completion_queue_thread.start()
     channel = implementations.insecure_channel('localhost', port)
     callback = _Callback()
 
@@ -114,9 +101,7 @@ class ChannelConnectivityTest(unittest.TestCase):
       self.assertFalse(ready_future.running())
     finally:
       ready_future.cancel()
-      server.shutdown()
-      server_completion_queue.shutdown()
-      server_completion_queue_thread.join()
+      server.stop(0)
 
 
 if __name__ == '__main__':
diff --git a/src/python/grpcio/tests/unit/beta/test_utilities.py b/src/python/grpcio/tests/unit/beta/test_utilities.py
index 8ccad04e056..692da9c97d7 100644
--- a/src/python/grpcio/tests/unit/beta/test_utilities.py
+++ b/src/python/grpcio/tests/unit/beta/test_utilities.py
@@ -51,5 +51,5 @@ def not_really_secure_channel(
   target = '%s:%d' % (host, port)
   channel = grpc.secure_channel(
       target, channel_credentials,
-      ((b'grpc.ssl_target_name_override', server_host_override,),))
+      (('grpc.ssl_target_name_override', server_host_override,),))
   return implementations.Channel(channel)
diff --git a/src/python/grpcio/tests/unit/test_common.py b/src/python/grpcio/tests/unit/test_common.py
index b779f65e7e9..c8886bf4ca5 100644
--- a/src/python/grpcio/tests/unit/test_common.py
+++ b/src/python/grpcio/tests/unit/test_common.py
@@ -33,10 +33,10 @@ import collections
 
 import six
 
-INVOCATION_INITIAL_METADATA = ((b'0', b'abc'), (b'1', b'def'), (b'2', b'ghi'),)
-SERVICE_INITIAL_METADATA = ((b'3', b'jkl'), (b'4', b'mno'), (b'5', b'pqr'),)
-SERVICE_TERMINAL_METADATA = ((b'6', b'stu'), (b'7', b'vwx'), (b'8', b'yza'),)
-DETAILS = b'test details'
+INVOCATION_INITIAL_METADATA = (('0', 'abc'), ('1', 'def'), ('2', 'ghi'),)
+SERVICE_INITIAL_METADATA = (('3', 'jkl'), ('4', 'mno'), ('5', 'pqr'),)
+SERVICE_TERMINAL_METADATA = (('6', 'stu'), ('7', 'vwx'), ('8', 'yza'),)
+DETAILS = 'test details'
 
 
 def metadata_transmitted(original_metadata, transmitted_metadata):
@@ -59,16 +59,10 @@ def metadata_transmitted(original_metadata, transmitted_metadata):
       original_metadata after having been transmitted via gRPC.
   """
   original = collections.defaultdict(list)
-  for key_value_pair in original_metadata:
-    key, value = tuple(key_value_pair)
-    if not isinstance(key, bytes):
-      key = key.encode()
-    if not isinstance(value, bytes):
-      value = value.encode()
+  for key, value in original_metadata:
     original[key].append(value)
   transmitted = collections.defaultdict(list)
-  for key_value_pair in transmitted_metadata:
-    key, value = tuple(key_value_pair)
+  for key, value in transmitted_metadata:
     transmitted[key].append(value)
 
   for key, values in six.iteritems(original):

From a45e24eb3e3a8f437303ad982abdd0c0a7327905 Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Wed, 29 Jun 2016 17:55:01 -0700
Subject: [PATCH 275/280] Removed invalid sentence

---
 doc/interop-test-descriptions.md | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/doc/interop-test-descriptions.md b/doc/interop-test-descriptions.md
index a4f9abecfae..b23ceac8e1b 100644
--- a/doc/interop-test-descriptions.md
+++ b/doc/interop-test-descriptions.md
@@ -30,8 +30,7 @@ Clients should accept these arguments:
       [ca.pem](https://github.com/grpc/grpc/blob/master/src/core/lib/tsi/test_creds/ca.pem)
       as the CA root
 * --default_service_account=ACCOUNT_EMAIL
-    * Email of the GCE default service account. Only applicable
-      for compute_engine_creds test.
+    * Email of the GCE default service account.
 * --oauth_scope=SCOPE
     * OAuth scope. For example, "https://www.googleapis.com/auth/xapi.zoo"
 * --service_account_key_file=PATH

From 0287be8e609c0dd3974025509a590720ab947c6b Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Wed, 29 Jun 2016 17:55:14 -0700
Subject: [PATCH 276/280] Use protoc and objc plugins built by run_test

---
 src/objective-c/tests/build_example_test.sh | 43 ++++++++++++++-------
 1 file changed, 28 insertions(+), 15 deletions(-)

diff --git a/src/objective-c/tests/build_example_test.sh b/src/objective-c/tests/build_example_test.sh
index 73405695e8e..93af0a1cfc2 100755
--- a/src/objective-c/tests/build_example_test.sh
+++ b/src/objective-c/tests/build_example_test.sh
@@ -35,22 +35,35 @@ set -eo pipefail
 
 cd `dirname $0`
 
-EXAMPLE_PATH=examples/objective-c/helloworld \
-SCHEME=HelloWorld                            \
-./build_one_example.sh
+BINDIR=`pwd`/../../../bins/$CONFIG
+TMP_PATH=$PATH
+hash protoc 2>/dev/null || TMP_PATH=$BINDIR/protobuf:$TMP_PATH
+PATH=$TMP_PATH hash protoc-gen-objcgrpc 2>/dev/null || {
+  ln -sf $BINDIR/grpc_objective_c_plugin $BINDIR/protoc-gen-objcgrpc
+  TMP_PATH=$BINDIR:$TMP_PATH
+}
 
-EXAMPLE_PATH=examples/objective-c/route_guide \
-SCHEME=RouteGuideClient                       \
-./build_one_example.sh
+SCHEME=HelloWorld                              \
+  EXAMPLE_PATH=examples/objective-c/helloworld \
+  PATH=$TMP_PATH                               \
+  ./build_one_example.sh
 
-EXAMPLE_PATH=examples/objective-c/auth_sample \
-SCHEME=AuthSample                             \
-./build_one_example.sh
+SCHEME=RouteGuideClient                         \
+  EXAMPLE_PATH=examples/objective-c/route_guide \
+  PATH=$TMP_PATH                                \
+  ./build_one_example.sh
 
-EXAMPLE_PATH=src/objective-c/examples/Sample \
-SCHEME=Sample                                \
-./build_one_example.sh
+SCHEME=AuthSample                               \
+  EXAMPLE_PATH=examples/objective-c/auth_sample \
+  PATH=$TMP_PATH                                \
+  ./build_one_example.sh
 
-EXAMPLE_PATH=src/objective-c/examples/SwiftSample \
-SCHEME=SwiftSample                                \
-./build_one_example.sh
+SCHEME=Sample                                  \
+  EXAMPLE_PATH=src/objective-c/examples/Sample \
+  PATH=$TMP_PATH                               \
+  ./build_one_example.sh
+
+SCHEME=SwiftSample                                  \
+  EXAMPLE_PATH=src/objective-c/examples/SwiftSample \
+  PATH=$TMP_PATH                                    \
+  ./build_one_example.sh

From 1e1a816c3f72b83e5ba304f32db57557a61e0f2f Mon Sep 17 00:00:00 2001
From: David Garcia Quintas <dgq@google.com>
Date: Wed, 29 Jun 2016 20:12:40 -0700
Subject: [PATCH 277/280] fixed size_t format string

---
 test/core/network_benchmarks/low_level_ping_pong.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/core/network_benchmarks/low_level_ping_pong.c b/test/core/network_benchmarks/low_level_ping_pong.c
index 1b40895a719..9038d076755 100644
--- a/test/core/network_benchmarks/low_level_ping_pong.c
+++ b/test/core/network_benchmarks/low_level_ping_pong.c
@@ -583,7 +583,7 @@ static int run_benchmark(char *socket_type, thread_args *client_args,
     return rv;
   }
 
-  gpr_log(GPR_INFO, "Starting test %s %s %d", client_args->strategy_name,
+  gpr_log(GPR_INFO, "Starting test %s %s %zu", client_args->strategy_name,
           socket_type, client_args->msg_size);
 
   gpr_thd_new(&tid, server_thread_wrap, server_args, NULL);

From f329395514182ef61f01552daabba471ae28085e Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Thu, 30 Jun 2016 10:44:30 -0700
Subject: [PATCH 278/280] Add comments in build_example_test.sh

---
 src/objective-c/tests/build_example_test.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/objective-c/tests/build_example_test.sh b/src/objective-c/tests/build_example_test.sh
index 93af0a1cfc2..5c3766b4c0b 100755
--- a/src/objective-c/tests/build_example_test.sh
+++ b/src/objective-c/tests/build_example_test.sh
@@ -37,7 +37,12 @@ cd `dirname $0`
 
 BINDIR=`pwd`/../../../bins/$CONFIG
 TMP_PATH=$PATH
+
+# If `protoc` is not found, add bins/$CONFIG/protobuf/protoc to the search path
 hash protoc 2>/dev/null || TMP_PATH=$BINDIR/protobuf:$TMP_PATH
+
+# If `protoc-gen-objcgrpc` is not found, make a symlink from
+# bins/$CONGIF/grpc_objective_c_plugin and add it to the search path
 PATH=$TMP_PATH hash protoc-gen-objcgrpc 2>/dev/null || {
   ln -sf $BINDIR/grpc_objective_c_plugin $BINDIR/protoc-gen-objcgrpc
   TMP_PATH=$BINDIR:$TMP_PATH

From 97d1cd87670f6eb082d2243bc7cfd4a21d33a78f Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Thu, 30 Jun 2016 11:31:23 -0700
Subject: [PATCH 279/280] Fix memory leak, fix error.c refcount reporting

---
 src/core/lib/iomgr/error.c         | 8 ++++----
 src/core/lib/transport/transport.c | 2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/core/lib/iomgr/error.c b/src/core/lib/iomgr/error.c
index e20a0169c50..149c55663c0 100644
--- a/src/core/lib/iomgr/error.c
+++ b/src/core/lib/iomgr/error.c
@@ -174,8 +174,8 @@ static bool is_special(grpc_error *err) {
 grpc_error *grpc_error_ref(grpc_error *err, const char *file, int line,
                            const char *func) {
   if (is_special(err)) return err;
-  gpr_log(GPR_DEBUG, "%p: %d -> %d [%s:%d %s]", err, err->refs.count,
-          err->refs.count + 1, file, line, func);
+  gpr_log(GPR_DEBUG, "%p: %" PRIdPTR " -> %" PRIdPTR " [%s:%d %s]", err,
+          err->refs.count, err->refs.count + 1, file, line, func);
   gpr_ref(&err->refs);
   return err;
 }
@@ -200,8 +200,8 @@ static void error_destroy(grpc_error *err) {
 void grpc_error_unref(grpc_error *err, const char *file, int line,
                       const char *func) {
   if (is_special(err)) return;
-  gpr_log(GPR_DEBUG, "%p: %d -> %d [%s:%d %s]", err, err->refs.count,
-          err->refs.count - 1, file, line, func);
+  gpr_log(GPR_DEBUG, "%p: %" PRIdPTR " -> %" PRIdPTR " [%s:%d %s]", err,
+          err->refs.count, err->refs.count - 1, file, line, func);
   if (gpr_unref(&err->refs)) {
     error_destroy(err);
   }
diff --git a/src/core/lib/transport/transport.c b/src/core/lib/transport/transport.c
index 79a20e12626..f8ddf5774a1 100644
--- a/src/core/lib/transport/transport.c
+++ b/src/core/lib/transport/transport.c
@@ -173,7 +173,7 @@ static void free_message(grpc_exec_ctx *exec_ctx, void *p, grpc_error *error) {
   close_message_data *cmd = p;
   GRPC_ERROR_UNREF(cmd->error);
   if (cmd->then_call != NULL) {
-    cmd->then_call->cb(exec_ctx, cmd->then_call->cb_arg, GRPC_ERROR_REF(error));
+    cmd->then_call->cb(exec_ctx, cmd->then_call->cb_arg, error);
   }
   gpr_free(cmd);
 }

From 2cb69ad2039345e71b7b2d9eb2530bc806568df0 Mon Sep 17 00:00:00 2001
From: Stanley Cheung <stanleycheung@google.com>
Date: Thu, 30 Jun 2016 11:47:14 -0700
Subject: [PATCH 280/280] php: update package.xml

---
 package.xml                    | 26 ++++++++++++++++++++++----
 templates/package.xml.template | 26 ++++++++++++++++++++++----
 2 files changed, 44 insertions(+), 8 deletions(-)

diff --git a/package.xml b/package.xml
index ebe4af90e43..49a6d900f12 100644
--- a/package.xml
+++ b/package.xml
@@ -10,7 +10,7 @@
   <email>grpc-packages@google.com</email>
   <active>yes</active>
  </lead>
- <date>2016-05-19</date>
+ <date>2016-06-30</date>
  <time>16:06:07</time>
  <version>
   <release>0.16.0</release>
@@ -22,7 +22,7 @@
  </stability>
  <license>BSD</license>
  <notes>
-- TBD
+- Fix shutdown hang problem #4017
  </notes>
  <contents>
   <dir baseinstalldir="/" name="/">
@@ -1034,6 +1034,7 @@ Update to wrap gRPC C Core version 0.10.0
    <license>BSD</license>
    <notes>
 - Simplify gRPC PHP installation #4517
+- Wrap gRPC core library version 0.13
    </notes>
   </release>
   <release>
@@ -1063,13 +1064,14 @@ Update to wrap gRPC C Core version 0.10.0
    <date>2016-04-19</date>
    <license>BSD</license>
    <notes>
+- wrap grpc C core version 0.14.0
 - destroy grpc_byte_buffer after startBatch #6096
    </notes>
   </release>
   <release>
    <version>
-    <release>0.14.2</release>
-    <api>0.14.2</api>
+    <release>0.15.0</release>
+    <api>0.15.0</api>
    </version>
    <stability>
     <release>beta</release>
@@ -1079,6 +1081,22 @@ Update to wrap gRPC C Core version 0.10.0
    <license>BSD</license>
    <notes>
 - Updated functions with TSRM macros for ZTS support #6607
+- Load default roots.pem via grpc_set_ssl_roots_override_callback #6848
+   </notes>
+  </release>
+  <release>
+   <version>
+    <release>0.15.1</release>
+    <api>0.15.1</api>
+   </version>
+   <stability>
+    <release>beta</release>
+    <api>beta</api>
+   </stability>
+   <date>2016-06-30</date>
+   <license>BSD</license>
+   <notes>
+- Fix shutdown hang problem #4017
    </notes>
   </release>
  </changelog>
diff --git a/templates/package.xml.template b/templates/package.xml.template
index a620a2d6a50..d8155cdd823 100644
--- a/templates/package.xml.template
+++ b/templates/package.xml.template
@@ -12,7 +12,7 @@
     <email>grpc-packages@google.com</email>
     <active>yes</active>
    </lead>
-   <date>2016-05-19</date>
+   <date>2016-06-30</date>
    <time>16:06:07</time>
    <version>
     <release>${settings.php_version.php()}</release>
@@ -24,7 +24,7 @@
    </stability>
    <license>BSD</license>
    <notes>
-  - TBD
+  - Fix shutdown hang problem #4017
    </notes>
    <contents>
     <dir baseinstalldir="/" name="/">
@@ -153,6 +153,7 @@
      <license>BSD</license>
      <notes>
   - Simplify gRPC PHP installation #4517
+  - Wrap gRPC core library version 0.13
      </notes>
     </release>
     <release>
@@ -182,13 +183,14 @@
      <date>2016-04-19</date>
      <license>BSD</license>
      <notes>
+  - wrap grpc C core version 0.14.0
   - destroy grpc_byte_buffer after startBatch #6096
      </notes>
     </release>
     <release>
      <version>
-      <release>0.14.2</release>
-      <api>0.14.2</api>
+      <release>0.15.0</release>
+      <api>0.15.0</api>
      </version>
      <stability>
       <release>beta</release>
@@ -198,6 +200,22 @@
      <license>BSD</license>
      <notes>
   - Updated functions with TSRM macros for ZTS support #6607
+  - Load default roots.pem via grpc_set_ssl_roots_override_callback #6848
+     </notes>
+    </release>
+    <release>
+     <version>
+      <release>0.15.1</release>
+      <api>0.15.1</api>
+     </version>
+     <stability>
+      <release>beta</release>
+      <api>beta</api>
+     </stability>
+     <date>2016-06-30</date>
+     <license>BSD</license>
+     <notes>
+  - Fix shutdown hang problem #4017
      </notes>
     </release>
    </changelog>