Merge up to 8597 to experimental/gc from the bleeding edge.

src/platform-cygwin.cc

Index: src/platform-cygwin.cc
===================================================================
--- src/platform-cygwin.cc	(revision 8618)
+++ src/platform-cygwin.cc	(working copy)
@@ -371,17 +371,15 @@
 
 
 
-Thread::Thread(Isolate* isolate, const Options& options)
+Thread::Thread(const Options& options)
     : data_(new PlatformData),
-      isolate_(isolate),
       stack_size_(options.stack_size) {
   set_name(options.name);
 }
 
 
-Thread::Thread(Isolate* isolate, const char* name)
+Thread::Thread(const char* name)
     : data_(new PlatformData),
-      isolate_(isolate),
       stack_size_(0) {
   set_name(name);
 }
@@ -399,7 +397,6 @@
   // one) so we initialize it here too.
   thread->data()->thread_ = pthread_self();
   ASSERT(thread->data()->thread_ != kNoThread);
-  Thread::SetThreadLocal(Isolate::isolate_key(), thread->isolate());
   thread->Run();
   return NULL;
 }
@@ -631,7 +628,7 @@
 class SamplerThread : public Thread {
  public:
   explicit SamplerThread(int interval)
-      : Thread(NULL, "SamplerThread"),
+      : Thread("SamplerThread"),
         interval_(interval) {}
 
   static void AddActiveSampler(Sampler* sampler) {
@@ -649,8 +646,7 @@
     ScopedLock lock(mutex_);
     SamplerRegistry::RemoveActiveSampler(sampler);
     if (SamplerRegistry::GetState() == SamplerRegistry::HAS_NO_SAMPLERS) {
-      RuntimeProfiler::WakeUpRuntimeProfilerThreadBeforeShutdown();
-      instance_->Join();
+      RuntimeProfiler::StopRuntimeProfilerThreadBeforeShutdown(instance_);
       delete instance_;
       instance_ = NULL;
     }