Add sanity test for CPU profiler

src/platform-win32.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1587 matching lines @@
 
 // Definition of invalid thread handle and id.
 static const HANDLE kNoThread = INVALID_HANDLE_VALUE;
 
 // Entry point for threads. The supplied argument is a pointer to the thread
 // object. The entry function dispatches to the run method in the thread
 // object. It is important that this function has __stdcall calling
 // convention.
 static unsigned int __stdcall ThreadEntry(void* arg) {
   Thread* thread = reinterpret_cast<Thread*>(arg);
-  thread->Run();
+  thread->NotifyStartedAndRun();
   return 0;
 }
 
 
 class Thread::PlatformData : public Malloced {
  public:
   explicit PlatformData(HANDLE thread) : thread_(thread) {}
   HANDLE thread_;
   unsigned thread_id_;
 };
 
 
 // Initialize a Win32 thread object. The thread has an invalid thread
 // handle until it is started.
 
 Thread::Thread(const Options& options)
-    : stack_size_(options.stack_size()) {
+    : stack_size_(options.stack_size()),
+      start_semaphore_(NULL) {
   data_ = new PlatformData(kNoThread);
   set_name(options.name());
 }
 
 
 void Thread::set_name(const char* name) {
   OS::StrNCpy(Vector<char>(name_, sizeof(name_)), name, strlen(name));
   name_[sizeof(name_) - 1] = '\0';
 }
 
@@ skipping 373 matching lines @@
         interval_(interval) {}
 
   static void SetUp() { if (!mutex_) mutex_ = OS::CreateMutex(); }
   static void TearDown() { delete mutex_; }
 
   static void AddActiveSampler(Sampler* sampler) {
     ScopedLock lock(mutex_);
     SamplerRegistry::AddActiveSampler(sampler);
     if (instance_ == NULL) {
       instance_ = new SamplerThread(sampler->interval());
-      instance_->Start();
+      instance_->StartSynchronously();
     } else {
       ASSERT(instance_->interval_ == sampler->interval());
     }
   }
 
   static void RemoveActiveSampler(Sampler* sampler) {
     ScopedLock lock(mutex_);
     SamplerRegistry::RemoveActiveSampler(sampler);
     if (SamplerRegistry::GetState() == SamplerRegistry::HAS_NO_SAMPLERS) {
       RuntimeProfiler::StopRuntimeProfilerThreadBeforeShutdown(instance_);
@@ skipping 118 matching lines @@
 
 
 void Sampler::Stop() {
   ASSERT(IsActive());
   SamplerThread::RemoveActiveSampler(this);
   SetActive(false);
 }
 
 
 } }  // namespace v8::internal