Fix for issue 25236

runtime/vm/os_thread_macos.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"  // NOLINT
 #if defined(TARGET_OS_MACOS)
 
 #include "vm/os_thread.h"
 
 #include <sys/errno.h>  // NOLINT
@@ skipping 70 matching lines @@
 // exits.
 static void* ThreadStart(void* data_ptr) {
   ThreadStartData* data = reinterpret_cast<ThreadStartData*>(data_ptr);
 
   const char* name = data->name();
   OSThread::ThreadStartFunction function = data->function();
   uword parameter = data->parameter();
   delete data;
 
   // Create new OSThread object and set as TLS for new thread.
-  OSThread* thread = new OSThread();
-  OSThread::SetCurrent(thread);
-  thread->set_name(name);
+  OSThread* thread = OSThread::CreateOSThread();
+  if (thread != NULL) {
+    OSThread::SetCurrent(thread);
+    thread->set_name(name);
 
-  // Call the supplied thread start function handing it its parameters.
-  function(parameter);
+    // Call the supplied thread start function handing it its parameters.
+    function(parameter);
+  }
 
   return NULL;
 }
 
 
 int OSThread::Start(const char* name,
                     ThreadStartFunction function,
                     uword parameter) {
   pthread_attr_t attr;
   int result = pthread_attr_init(&attr);
@@ skipping 309 matching lines @@
 void Monitor::NotifyAll() {
   // When running with assertions enabled we track the owner.
   ASSERT(IsOwnedByCurrentThread());
   int result = pthread_cond_broadcast(data_.cond());
   VALIDATE_PTHREAD_RESULT(result);
 }
 
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_MACOS)