From a79a8111af512d2013b50521928205c279a60df2 Mon Sep 17 00:00:00 2001
From: Yijie Ma <yijiem@google.com>
Date: Mon, 20 May 2024 12:09:37 -0700
Subject: [PATCH] [EventEngine] Enable the EventEngine DNS Resolver on Windows
 (#36286)

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Closes #36286

COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/36286 from yijiem:enable-win-ee-dns 9276c47326383dd60f78d8c20f66ab048f1e928a
PiperOrigin-RevId: 635531420
---
 bazel/experiments.bzl                   | 6 ++++++
 src/core/lib/experiments/experiments.cc | 2 +-
 src/core/lib/experiments/experiments.h  | 3 ++-
 src/core/lib/experiments/rollouts.yaml  | 4 +---
 4 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/bazel/experiments.bzl b/bazel/experiments.bzl
index 013e8ae208a..e3aeb05464d 100644
--- a/bazel/experiments.bzl
+++ b/bazel/experiments.bzl
@@ -74,6 +74,9 @@ EXPERIMENTS = {
             ],
         },
         "on": {
+            "cancel_ares_query_test": [
+                "event_engine_dns",
+            ],
             "core_end2end_test": [
                 "event_engine_client",
                 "event_engine_listener",
@@ -90,6 +93,9 @@ EXPERIMENTS = {
             "lb_unit_test": [
                 "pick_first_new",
             ],
+            "resolver_component_tests_runner_invoker": [
+                "event_engine_dns",
+            ],
             "xds_end2end_test": [
                 "pick_first_new",
             ],
diff --git a/src/core/lib/experiments/experiments.cc b/src/core/lib/experiments/experiments.cc
index a8996e8e124..468884ec583 100644
--- a/src/core/lib/experiments/experiments.cc
+++ b/src/core/lib/experiments/experiments.cc
@@ -328,7 +328,7 @@ const ExperimentMetadata g_experiment_metadata[] = {
     {"event_engine_client", description_event_engine_client,
      additional_constraints_event_engine_client, nullptr, 0, true, true},
     {"event_engine_dns", description_event_engine_dns,
-     additional_constraints_event_engine_dns, nullptr, 0, false, false},
+     additional_constraints_event_engine_dns, nullptr, 0, true, false},
     {"event_engine_listener", description_event_engine_listener,
      additional_constraints_event_engine_listener, nullptr, 0, true, true},
     {"free_large_allocator", description_free_large_allocator,
diff --git a/src/core/lib/experiments/experiments.h b/src/core/lib/experiments/experiments.h
index db7c9664bcd..9e3ba9148ba 100644
--- a/src/core/lib/experiments/experiments.h
+++ b/src/core/lib/experiments/experiments.h
@@ -99,7 +99,8 @@ inline bool IsCanaryClientPrivacyEnabled() { return false; }
 inline bool IsClientPrivacyEnabled() { return false; }
 #define GRPC_EXPERIMENT_IS_INCLUDED_EVENT_ENGINE_CLIENT
 inline bool IsEventEngineClientEnabled() { return true; }
-inline bool IsEventEngineDnsEnabled() { return false; }
+#define GRPC_EXPERIMENT_IS_INCLUDED_EVENT_ENGINE_DNS
+inline bool IsEventEngineDnsEnabled() { return true; }
 #define GRPC_EXPERIMENT_IS_INCLUDED_EVENT_ENGINE_LISTENER
 inline bool IsEventEngineListenerEnabled() { return true; }
 inline bool IsFreeLargeAllocatorEnabled() { return false; }
diff --git a/src/core/lib/experiments/rollouts.yaml b/src/core/lib/experiments/rollouts.yaml
index 97018a672cd..7187f8c2952 100644
--- a/src/core/lib/experiments/rollouts.yaml
+++ b/src/core/lib/experiments/rollouts.yaml
@@ -64,9 +64,7 @@
     # not tested on iOS at all
     ios: broken
     posix: true
-    # TODO(yijiem): resolve when the WindowsEventEngine DNS Resolver is
-    # implemented
-    windows: broken
+    windows: true
 - name: event_engine_listener
   default:
     # not tested on iOS at all