Rollback of r11015, r11014, r11011, r11010 in trunk branch.

src/runtime-profiler.cc

Index: src/runtime-profiler.cc
diff --git a/src/runtime-profiler.cc b/src/runtime-profiler.cc
index cde6057ac406a4b428ef77464f953463f3d82601..fc7e3591c4f91c8bfa60688cfa984087e66f8996 100644
--- a/src/runtime-profiler.cc
+++ b/src/runtime-profiler.cc
@@ -72,9 +72,9 @@ static const int kMaxSizeEarlyOpt = 500;
 
 
 Atomic32 RuntimeProfiler::state_ = 0;
-
-// TODO(isolates): Clean up the semaphore when it is no longer required.
-static LazySemaphore<0>::type semaphore = LAZY_SEMAPHORE_INITIALIZER;
+// TODO(isolates): Create the semaphore lazily and clean it up when no
+// longer required.
+Semaphore* RuntimeProfiler::semaphore_ = OS::CreateSemaphore(0);
 
 #ifdef DEBUG
 bool RuntimeProfiler::has_been_globally_set_up_ = false;
@@ -412,7 +412,7 @@ void RuntimeProfiler::HandleWakeUp(Isolate* isolate) {
   // undid the decrement done by the profiler thread. Increment again
   // to get the right count of active isolates.
   NoBarrier_AtomicIncrement(&state_, 1);
-  semaphore.Pointer()->Signal();
+  semaphore_->Signal();
 }
 
 
@@ -425,7 +425,7 @@ bool RuntimeProfiler::WaitForSomeIsolateToEnterJS() {
   Atomic32 old_state = NoBarrier_CompareAndSwap(&state_, 0, -1);
   ASSERT(old_state >= -1);
   if (old_state != 0) return false;
-  semaphore.Pointer()->Wait();
+  semaphore_->Wait();
   return true;
 }
 
@@ -441,7 +441,7 @@ void RuntimeProfiler::StopRuntimeProfilerThreadBeforeShutdown(Thread* thread) {
   if (new_state == 0) {
     // The profiler thread is waiting. Wake it up. It must check for
     // stop conditions before attempting to wait again.
-    semaphore.Pointer()->Signal();
+    semaphore_->Signal();
   }
   thread->Join();
   // The profiler thread is now stopped. Undo the increment in case it