Fix all instances of bugprone-undefined-memory-manipulation

.clang-tidy

@@ -1,6 +1,6 @@
 ---
-Checks: 'modernize-use-nullptr,google-build-namespaces,google-build-explicit-make-pair,readability-function-size,performance-*'
+Checks: 'modernize-use-nullptr,google-build-namespaces,google-build-explicit-make-pair,readability-function-size,performance-*,bugprone-*'
-WarningsAsErrors: 'modernize-use-nullptr,google-build-namespaces,google-build-explicit-make-pair,readability-function-size,performance-*'
+WarningsAsErrors: 'modernize-use-nullptr,google-build-namespaces,google-build-explicit-make-pair,readability-function-size,performance-*,bugprone-*'
 CheckOptions:
   - key:    readability-function-size.StatementThreshold
     value:  '450'

src/core/ext/filters/client_channel/client_channel.cc

@@ -457,7 +457,6 @@ get_service_config_from_resolver_result_locked(channel_data* chand) {
         grpc_uri* uri = grpc_uri_parse(server_uri, true);
         GPR_ASSERT(uri->path[0] != '\0');
         service_config_parsing_state parsing_state;
-        memset(&parsing_state, 0, sizeof(parsing_state));
         parsing_state.server_name =
             uri->path[0] == '/' ? uri->path + 1 : uri->path;
         service_config->ParseGlobalParams(parse_retry_throttle_params,

src/core/lib/surface/channel.cc

@@ -100,7 +100,6 @@ grpc_channel* grpc_channel_create_with_builder(
     return channel;
   }
 
-  memset(channel, 0, sizeof(*channel));
   channel->target = target;
   channel->is_client = grpc_channel_stack_type_is_client(channel_stack_type);
   size_t channel_tracer_max_nodes = 0;  // default to off

src/core/tsi/alts_transport_security.cc

@@ -45,7 +45,9 @@ void grpc_tsi_alts_signal_for_cq_destroy() {
 }
 
 void grpc_tsi_alts_init() {
-  memset(&g_alts_resource, 0, sizeof(alts_shared_resource));
+  g_alts_resource.channel = nullptr;
+  g_alts_resource.cq = nullptr;
+  g_alts_resource.is_cq_drained = false;
   gpr_mu_init(&g_alts_resource.mu);
   gpr_cv_init(&g_alts_resource.cv);
 }

test/core/end2end/fixtures/http_proxy_fixture.cc

@@ -52,6 +52,16 @@
 #include "test/core/util/port.h"
 
 struct grpc_end2end_http_proxy {
+  grpc_end2end_http_proxy()
+      : proxy_name(nullptr),
+        server(nullptr),
+        channel_args(nullptr),
+        mu(nullptr),
+        pollset(nullptr),
+        combiner(nullptr) {
+    gpr_ref_init(&users, 1);
+    combiner = grpc_combiner_create();
+  }
   char* proxy_name;
   grpc_core::Thread thd;
   grpc_tcp_server* server;
@@ -519,11 +529,7 @@ static void thread_main(void* arg) {
 grpc_end2end_http_proxy* grpc_end2end_http_proxy_create(
     grpc_channel_args* args) {
   grpc_core::ExecCtx exec_ctx;
-  grpc_end2end_http_proxy* proxy =
+  grpc_end2end_http_proxy* proxy = grpc_core::New<grpc_end2end_http_proxy>();
-      static_cast<grpc_end2end_http_proxy*>(gpr_malloc(sizeof(*proxy)));
-  memset(proxy, 0, sizeof(*proxy));
-  proxy->combiner = grpc_combiner_create();
-  gpr_ref_init(&proxy->users, 1);
   // Construct proxy address.
   const int proxy_port = grpc_pick_unused_port_or_die();
   gpr_join_host_port(&proxy->proxy_name, "localhost", proxy_port);
@@ -573,7 +579,7 @@ void grpc_end2end_http_proxy_destroy(grpc_end2end_http_proxy* proxy) {
                         GRPC_CLOSURE_CREATE(destroy_pollset, proxy->pollset,
                                             grpc_schedule_on_exec_ctx));
   GRPC_COMBINER_UNREF(proxy->combiner, "test");
-  gpr_free(proxy);
+  grpc_core::Delete(proxy);
 }
 
 const char* grpc_end2end_http_proxy_get_proxy_name(

test/core/end2end/fixtures/proxy.cc

@@ -30,6 +30,17 @@
 #include "test/core/util/port.h"
 
 struct grpc_end2end_proxy {
+  grpc_end2end_proxy()
+      : proxy_port(nullptr),
+        server_port(nullptr),
+        cq(nullptr),
+        server(nullptr),
+        client(nullptr),
+        shutdown(false),
+        new_call(nullptr) {
+    memset(&new_call_details, 0, sizeof(new_call_details));
+    memset(&new_call_metadata, 0, sizeof(new_call_metadata));
+  }
   grpc_core::Thread thd;
   char* proxy_port;
   char* server_port;
@@ -79,9 +90,7 @@ grpc_end2end_proxy* grpc_end2end_proxy_create(const grpc_end2end_proxy_def* def,
   int proxy_port = grpc_pick_unused_port_or_die();
   int server_port = grpc_pick_unused_port_or_die();
 
-  grpc_end2end_proxy* proxy =
+  grpc_end2end_proxy* proxy = grpc_core::New<grpc_end2end_proxy>();
-      static_cast<grpc_end2end_proxy*>(gpr_malloc(sizeof(*proxy)));
-  memset(proxy, 0, sizeof(*proxy));
 
   gpr_join_host_port(&proxy->proxy_port, "localhost", proxy_port);
   gpr_join_host_port(&proxy->server_port, "localhost", server_port);
@@ -128,7 +137,7 @@ void grpc_end2end_proxy_destroy(grpc_end2end_proxy* proxy) {
   grpc_channel_destroy(proxy->client);
   grpc_completion_queue_destroy(proxy->cq);
   grpc_call_details_destroy(&proxy->new_call_details);
-  gpr_free(proxy);
+  grpc_core::Delete(proxy);
 }
 
 static void unrefpc(proxy_call* pc, const char* reason) {