- Add assertions in MutexLocker/MonitorLocker to ensure that the code enclosed

runtime/vm/thread_pool.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 "vm/thread_pool.h"
 
 #include "vm/flags.h"
 #include "vm/lockers.h"
 
 namespace dart {
@@ skipping 365 matching lines @@
 
 bool ThreadPool::Worker::Loop() {
   MonitorLocker ml(&monitor_);
   int64_t idle_start;
   while (true) {
     ASSERT(task_ != NULL);
     Task* task = task_;
     task_ = NULL;
 
     // Release monitor while handling the task.
-    monitor_.Exit();
+    ml.Exit();
     task->Run();
     ASSERT(Isolate::Current() == NULL);
     delete task;
-    monitor_.Enter();
+    ml.Enter();
 
     ASSERT(task_ == NULL);
     if (IsDone()) {
       return false;
     }
     ASSERT(!done_);
     pool_->SetIdleAndReapExited(this);
     idle_start = OS::GetCurrentTimeMillis();
     while (true) {
       Monitor::WaitResult result = ml.Wait(ComputeTimeout(idle_start));
@@ skipping 75 matching lines @@
     // is not due to a ThreadPool Shutdown. Thus, we simply delete the worker.
     // The worker's id is added to the thread pool's join list by
     // ReleaseIdleWorker, so in the case that the thread pool begins shutting
     // down immediately after returning from worker->Loop() above, we still
     // wait for the thread to exit by joining on it in Shutdown().
     delete worker;
   }
 }
 
 }  // namespace dart