Merge branch 'master' into fix-dns-job-2

src/core/lib/iomgr/tcp_posix.cc

@@ -26,6 +26,7 @@
 #include "src/core/lib/iomgr/tcp_posix.h"
 
 #include <errno.h>
+#include <limits.h>
 #include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
@@ -513,7 +514,11 @@ static void tcp_read(grpc_endpoint* ep, grpc_slice_buffer* incoming_buffer,
 }
 
 /* returns true if done, false if pending; if returning true, *error is set */
+#if defined(IOV_MAX) && IOV_MAX < 1000
+#define MAX_WRITE_IOVEC IOV_MAX
+#else
 #define MAX_WRITE_IOVEC 1000
+#endif
 static bool tcp_flush(grpc_tcp* tcp, grpc_error** error) {
   struct msghdr msg;
   struct iovec iov[MAX_WRITE_IOVEC];

tools/internal_ci/linux/grpc_tsan_on_foundry.sh

@@ -14,5 +14,5 @@
 # limitations under the License.
 
 export UPLOAD_TEST_RESULTS=true
-EXTRA_FLAGS="--copt=-gmlt --strip=never --copt=-fsanitize=thread --linkopt=-fsanitize=thread --test_timeout=3600 --action_env=TSAN_OPTIONS=suppressions=test/core/util/tsan_suppressions.txt:halt_on_error=1:second_deadlock_stack=1"
+EXTRA_FLAGS="--copt=-gmlt --strip=never --copt=-fsanitize=thread --linkopt=-fsanitize=thread --test_timeout=3600 --action_env=TSAN_OPTIONS=suppressions=test/core/util/tsan_suppressions.txt:halt_on_error=1:second_deadlock_stack=1  --runs_per_test_detects_flakes --runs_per_test=2"
 github/grpc/tools/internal_ci/linux/grpc_bazel_on_foundry_base.sh "${EXTRA_FLAGS}"

tools/internal_ci/linux/pull_request/grpc_tsan_on_foundry.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+# Copyright 2017 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+EXTRA_FLAGS="--copt=-gmlt --strip=never --copt=-fsanitize=thread --linkopt=-fsanitize=thread --test_timeout=3600 --action_env=TSAN_OPTIONS=suppressions=test/core/util/tsan_suppressions.txt:halt_on_error=1:second_deadlock_stack=1"
+github/grpc/tools/internal_ci/linux/grpc_bazel_on_foundry_base.sh "${EXTRA_FLAGS}"