Index: lib/tsan/tests/rtl/tsan_posix.cc
===================================================================
--- lib/tsan/tests/rtl/tsan_posix.cc
+++ lib/tsan/tests/rtl/tsan_posix.cc
@@ -11,6 +11,7 @@
 //
 //===----------------------------------------------------------------------===//
 #include "tsan_interface.h"
+#include "tsan_posix_util.h"
 #include "tsan_test_util.h"
 #include "gtest/gtest.h"
 #include <pthread.h>
@@ -30,10 +31,10 @@
 
 static void thread_secific_dtor(void *v) {
   thread_key *k = (thread_key *)v;
-  EXPECT_EQ(pthread_mutex_lock(k->mtx), 0);
+  EXPECT_EQ(__interceptor_pthread_mutex_lock(k->mtx), 0);
   (*k->cnt)++;
   __tsan_write4(&k->cnt);
-  EXPECT_EQ(pthread_mutex_unlock(k->mtx), 0);
+  EXPECT_EQ(__interceptor_pthread_mutex_unlock(k->mtx), 0);
   if (k->val == 42) {
     // Okay.
   } else if (k->val == 43 || k->val == 44) {
@@ -55,22 +56,22 @@
   pthread_key_t key;
   EXPECT_EQ(pthread_key_create(&key, thread_secific_dtor), 0);
   pthread_mutex_t mtx;
-  EXPECT_EQ(pthread_mutex_init(&mtx, 0), 0);
+  EXPECT_EQ(__interceptor_pthread_mutex_init(&mtx, 0), 0);
   pthread_t th[3];
   thread_key k1 = thread_key(key, &mtx, 42, &cnt);
   thread_key k2 = thread_key(key, &mtx, 43, &cnt);
   thread_key k3 = thread_key(key, &mtx, 44, &cnt);
-  EXPECT_EQ(pthread_create(&th[0], 0, dtors_thread, &k1), 0);
-  EXPECT_EQ(pthread_create(&th[1], 0, dtors_thread, &k2), 0);
-  EXPECT_EQ(pthread_join(th[0], 0), 0);
-  EXPECT_EQ(pthread_create(&th[2], 0, dtors_thread, &k3), 0);
-  EXPECT_EQ(pthread_join(th[1], 0), 0);
-  EXPECT_EQ(pthread_join(th[2], 0), 0);
+  EXPECT_EQ(__interceptor_pthread_create(&th[0], 0, dtors_thread, &k1), 0);
+  EXPECT_EQ(__interceptor_pthread_create(&th[1], 0, dtors_thread, &k2), 0);
+  EXPECT_EQ(__interceptor_pthread_join(th[0], 0), 0);
+  EXPECT_EQ(__interceptor_pthread_create(&th[2], 0, dtors_thread, &k3), 0);
+  EXPECT_EQ(__interceptor_pthread_join(th[1], 0), 0);
+  EXPECT_EQ(__interceptor_pthread_join(th[2], 0), 0);
   EXPECT_EQ(pthread_key_delete(key), 0);
   EXPECT_EQ(6, cnt);
 }
 
-#ifndef __aarch64__
+#if !defined(__aarch64__) && !defined(__APPLE__)
 static __thread int local_var;
 
 static void *local_thread(void *p) {
@@ -81,10 +82,10 @@
   const int kThreads = 4;
   pthread_t th[kThreads];
   for (int i = 0; i < kThreads; i++)
-    EXPECT_EQ(pthread_create(&th[i], 0, local_thread,
+    EXPECT_EQ(__interceptor_pthread_create(&th[i], 0, local_thread,
               (void*)((long)p - 1)), 0);  // NOLINT
   for (int i = 0; i < kThreads; i++)
-    EXPECT_EQ(pthread_join(th[i], 0), 0);
+    EXPECT_EQ(__interceptor_pthread_join(th[i], 0), 0);
   return 0;
 }
 #endif
@@ -92,7 +93,9 @@
 TEST(Posix, ThreadLocalAccesses) {
 // The test is failing with high thread count for aarch64.
 // FIXME: track down the issue and re-enable the test.
-#ifndef __aarch64__
+// On Darwin, we're running unit tests without interceptors and __thread is
+// using malloc and free, which causes false data race reports.
+#if !defined(__aarch64__) && !defined(__APPLE__)
   local_thread((void*)2);
 #endif
 }
@@ -106,46 +109,46 @@
 static void *cond_thread(void *p) {
   CondContext &ctx = *static_cast<CondContext*>(p);
 
-  EXPECT_EQ(pthread_mutex_lock(&ctx.m), 0);
+  EXPECT_EQ(__interceptor_pthread_mutex_lock(&ctx.m), 0);
   EXPECT_EQ(ctx.data, 0);
   ctx.data = 1;
-  EXPECT_EQ(pthread_cond_signal(&ctx.c), 0);
-  EXPECT_EQ(pthread_mutex_unlock(&ctx.m), 0);
+  EXPECT_EQ(__interceptor_pthread_cond_signal(&ctx.c), 0);
+  EXPECT_EQ(__interceptor_pthread_mutex_unlock(&ctx.m), 0);
 
-  EXPECT_EQ(pthread_mutex_lock(&ctx.m), 0);
+  EXPECT_EQ(__interceptor_pthread_mutex_lock(&ctx.m), 0);
   while (ctx.data != 2)
-    EXPECT_EQ(pthread_cond_wait(&ctx.c, &ctx.m), 0);
-  EXPECT_EQ(pthread_mutex_unlock(&ctx.m), 0);
+    EXPECT_EQ(__interceptor_pthread_cond_wait(&ctx.c, &ctx.m), 0);
+  EXPECT_EQ(__interceptor_pthread_mutex_unlock(&ctx.m), 0);
 
-  EXPECT_EQ(pthread_mutex_lock(&ctx.m), 0);
+  EXPECT_EQ(__interceptor_pthread_mutex_lock(&ctx.m), 0);
   ctx.data = 3;
   EXPECT_EQ(pthread_cond_broadcast(&ctx.c), 0);
-  EXPECT_EQ(pthread_mutex_unlock(&ctx.m), 0);
+  EXPECT_EQ(__interceptor_pthread_mutex_unlock(&ctx.m), 0);
 
   return 0;
 }
 
 TEST(Posix, CondBasic) {
   CondContext ctx;
-  EXPECT_EQ(pthread_mutex_init(&ctx.m, 0), 0);
-  EXPECT_EQ(pthread_cond_init(&ctx.c, 0), 0);
+  EXPECT_EQ(__interceptor_pthread_mutex_init(&ctx.m, 0), 0);
+  EXPECT_EQ(__interceptor_pthread_cond_init(&ctx.c, 0), 0);
   ctx.data = 0;
   pthread_t th;
-  EXPECT_EQ(pthread_create(&th, 0, cond_thread, &ctx), 0);
+  EXPECT_EQ(__interceptor_pthread_create(&th, 0, cond_thread, &ctx), 0);
 
-  EXPECT_EQ(pthread_mutex_lock(&ctx.m), 0);
+  EXPECT_EQ(__interceptor_pthread_mutex_lock(&ctx.m), 0);
   while (ctx.data != 1)
-    EXPECT_EQ(pthread_cond_wait(&ctx.c, &ctx.m), 0);
+    EXPECT_EQ(__interceptor_pthread_cond_wait(&ctx.c, &ctx.m), 0);
   ctx.data = 2;
-  EXPECT_EQ(pthread_mutex_unlock(&ctx.m), 0);
+  EXPECT_EQ(__interceptor_pthread_mutex_unlock(&ctx.m), 0);
   EXPECT_EQ(pthread_cond_broadcast(&ctx.c), 0);
 
-  EXPECT_EQ(pthread_mutex_lock(&ctx.m), 0);
+  EXPECT_EQ(__interceptor_pthread_mutex_lock(&ctx.m), 0);
   while (ctx.data != 3)
-    EXPECT_EQ(pthread_cond_wait(&ctx.c, &ctx.m), 0);
-  EXPECT_EQ(pthread_mutex_unlock(&ctx.m), 0);
+    EXPECT_EQ(__interceptor_pthread_cond_wait(&ctx.c, &ctx.m), 0);
+  EXPECT_EQ(__interceptor_pthread_mutex_unlock(&ctx.m), 0);
 
-  EXPECT_EQ(pthread_join(th, 0), 0);
-  EXPECT_EQ(pthread_cond_destroy(&ctx.c), 0);
-  EXPECT_EQ(pthread_mutex_destroy(&ctx.m), 0);
+  EXPECT_EQ(__interceptor_pthread_join(th, 0), 0);
+  EXPECT_EQ(__interceptor_pthread_cond_destroy(&ctx.c), 0);
+  EXPECT_EQ(__interceptor_pthread_mutex_destroy(&ctx.m), 0);
 }
Index: lib/tsan/tests/rtl/tsan_posix_util.h
===================================================================
--- lib/tsan/tests/rtl/tsan_posix_util.h
+++ lib/tsan/tests/rtl/tsan_posix_util.h
@@ -0,0 +1,77 @@
+//===-- tsan_posix_util.h ---------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of ThreadSanitizer (TSan), a race detector.
+//
+// Test POSIX utils.
+//===----------------------------------------------------------------------===//
+#ifndef TSAN_POSIX_UTIL_H
+#define TSAN_POSIX_UTIL_H
+
+#include <pthread.h>
+
+#ifdef __APPLE__
+#define __interceptor_memcpy wrap_memcpy
+#define __interceptor_memset wrap_memset
+#define __interceptor_pthread_create wrap_pthread_create
+#define __interceptor_pthread_join wrap_pthread_join
+#define __interceptor_pthread_detach wrap_pthread_detach
+#define __interceptor_pthread_mutex_init wrap_pthread_mutex_init
+#define __interceptor_pthread_mutex_lock wrap_pthread_mutex_lock
+#define __interceptor_pthread_mutex_unlock wrap_pthread_mutex_unlock
+#define __interceptor_pthread_mutex_destroy wrap_pthread_mutex_destroy
+#define __interceptor_pthread_mutex_trylock wrap_pthread_mutex_trylock
+#define __interceptor_pthread_rwlock_init wrap_pthread_rwlock_init
+#define __interceptor_pthread_rwlock_destroy wrap_pthread_rwlock_destroy
+#define __interceptor_pthread_rwlock_trywrlock wrap_pthread_rwlock_trywrlock
+#define __interceptor_pthread_rwlock_wrlock wrap_pthread_rwlock_wrlock
+#define __interceptor_pthread_rwlock_unlock wrap_pthread_rwlock_unlock
+#define __interceptor_pthread_rwlock_rdlock wrap_pthread_rwlock_rdlock
+#define __interceptor_pthread_rwlock_tryrdlock wrap_pthread_rwlock_tryrdlock
+#define __interceptor_pthread_cond_init wrap_pthread_cond_init
+#define __interceptor_pthread_cond_signal wrap_pthread_cond_signal
+#define __interceptor_pthread_cond_broadcast wrap_pthread_cond_broadcast
+#define __interceptor_pthread_cond_wait wrap_pthread_cond_wait
+#define __interceptor_pthread_cond_destroy wrap_pthread_cond_destroy
+#endif
+
+extern "C" void *__interceptor_memcpy(void *, const void *, uptr);
+extern "C" void *__interceptor_memset(void *, int, uptr);
+extern "C" int __interceptor_pthread_create(pthread_t *thread,
+                                            const pthread_attr_t *attr,
+                                            void *(*start_routine)(void *),
+                                            void *arg);
+extern "C" int __interceptor_pthread_join(pthread_t thread, void **value_ptr);
+extern "C" int __interceptor_pthread_detach(pthread_t thread);
+
+extern "C" int __interceptor_pthread_mutex_init(
+    pthread_mutex_t *mutex, const pthread_mutexattr_t *attr);
+extern "C" int __interceptor_pthread_mutex_lock(pthread_mutex_t *mutex);
+extern "C" int __interceptor_pthread_mutex_unlock(pthread_mutex_t *mutex);
+extern "C" int __interceptor_pthread_mutex_destroy(pthread_mutex_t *mutex);
+extern "C" int __interceptor_pthread_mutex_trylock(pthread_mutex_t *mutex);
+
+extern "C" int __interceptor_pthread_rwlock_init(
+    pthread_rwlock_t *rwlock, const pthread_rwlockattr_t *attr);
+extern "C" int __interceptor_pthread_rwlock_destroy(pthread_rwlock_t *rwlock);
+extern "C" int __interceptor_pthread_rwlock_trywrlock(pthread_rwlock_t *rwlock);
+extern "C" int __interceptor_pthread_rwlock_wrlock(pthread_rwlock_t *rwlock);
+extern "C" int __interceptor_pthread_rwlock_unlock(pthread_rwlock_t *rwlock);
+extern "C" int __interceptor_pthread_rwlock_rdlock(pthread_rwlock_t *rwlock);
+extern "C" int __interceptor_pthread_rwlock_tryrdlock(pthread_rwlock_t *rwlock);
+
+extern "C" int __interceptor_pthread_cond_init(pthread_cond_t *cond,
+                                               const pthread_condattr_t *attr);
+extern "C" int __interceptor_pthread_cond_signal(pthread_cond_t *cond);
+extern "C" int __interceptor_pthread_cond_broadcast(pthread_cond_t *cond);
+extern "C" int __interceptor_pthread_cond_wait(pthread_cond_t *cond,
+                                               pthread_mutex_t *mutex);
+extern "C" int __interceptor_pthread_cond_destroy(pthread_cond_t *cond);
+
+#endif  // #ifndef TSAN_POSIX_UTIL_H
Index: lib/tsan/tests/rtl/tsan_test_util_posix.cc
===================================================================
--- lib/tsan/tests/rtl/tsan_test_util_posix.cc
+++ lib/tsan/tests/rtl/tsan_test_util_posix.cc
@@ -14,6 +14,7 @@
 
 #include "sanitizer_common/sanitizer_atomic.h"
 #include "tsan_interface.h"
+#include "tsan_posix_util.h"
 #include "tsan_test_util.h"
 #include "tsan_report.h"
 
@@ -33,52 +34,6 @@
 static __thread bool expect_report_reported;
 static __thread ReportType expect_report_type;
 
-#ifdef __APPLE__
-#define __interceptor_memcpy wrap_memcpy
-#define __interceptor_memset wrap_memset
-#define __interceptor_pthread_create wrap_pthread_create
-#define __interceptor_pthread_join wrap_pthread_join
-#define __interceptor_pthread_detach wrap_pthread_detach
-#define __interceptor_pthread_mutex_init wrap_pthread_mutex_init
-#define __interceptor_pthread_mutex_lock wrap_pthread_mutex_lock
-#define __interceptor_pthread_mutex_unlock wrap_pthread_mutex_unlock
-#define __interceptor_pthread_mutex_destroy wrap_pthread_mutex_destroy
-#define __interceptor_pthread_mutex_trylock wrap_pthread_mutex_trylock
-#define __interceptor_pthread_rwlock_init wrap_pthread_rwlock_init
-#define __interceptor_pthread_rwlock_destroy wrap_pthread_rwlock_destroy
-#define __interceptor_pthread_rwlock_trywrlock wrap_pthread_rwlock_trywrlock
-#define __interceptor_pthread_rwlock_wrlock wrap_pthread_rwlock_wrlock
-#define __interceptor_pthread_rwlock_unlock wrap_pthread_rwlock_unlock
-#define __interceptor_pthread_rwlock_rdlock wrap_pthread_rwlock_rdlock
-#define __interceptor_pthread_rwlock_tryrdlock wrap_pthread_rwlock_tryrdlock
-#endif
-
-extern "C" void *__interceptor_memcpy(void *, const void *, uptr);
-extern "C" void *__interceptor_memset(void *, int, uptr);
-extern "C" int __interceptor_pthread_create(pthread_t *thread,
-                                            const pthread_attr_t *attr,
-                                            void *(*start_routine)(void *),
-                                            void *arg);
-extern "C" int __interceptor_pthread_join(pthread_t thread, void **value_ptr);
-extern "C" int __interceptor_pthread_detach(pthread_t thread);
-
-extern "C" int __interceptor_pthread_mutex_init(
-    pthread_mutex_t *mutex, const pthread_mutexattr_t *attr);
-extern "C" int __interceptor_pthread_mutex_lock(pthread_mutex_t *mutex);
-extern "C" int __interceptor_pthread_mutex_unlock(pthread_mutex_t *mutex);
-extern "C" int __interceptor_pthread_mutex_destroy(pthread_mutex_t *mutex);
-extern "C" int __interceptor_pthread_mutex_trylock(pthread_mutex_t *mutex);
-
-extern "C" int __interceptor_pthread_rwlock_init(
-    pthread_rwlock_t *rwlock, const pthread_rwlockattr_t *attr);
-extern "C" int __interceptor_pthread_rwlock_destroy(pthread_rwlock_t *rwlock);
-extern "C" int __interceptor_pthread_rwlock_trywrlock(pthread_rwlock_t *rwlock);
-extern "C" int __interceptor_pthread_rwlock_wrlock(pthread_rwlock_t *rwlock);
-extern "C" int __interceptor_pthread_rwlock_unlock(pthread_rwlock_t *rwlock);
-extern "C" int __interceptor_pthread_rwlock_rdlock(pthread_rwlock_t *rwlock);
-extern "C" int __interceptor_pthread_rwlock_tryrdlock(pthread_rwlock_t *rwlock);
-
-
 static void *BeforeInitThread(void *param) {
   (void)param;
   return 0;