Oilpan: Add more trace events to platform/heap/

Source/platform/heap/Handle.h

 /*
  * Copyright (C) 2014 Google Inc. 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
@@ skipping 268 matching lines @@
         if (!m_count)
             ThreadState::current()->freeWrapperPersistentRegion(this);
     }
 
     bool removeIfNotLast(WrapperPersistentRegion** headPtr);
     static void insertHead(WrapperPersistentRegion** headPtr, WrapperPersistentRegion* newHead);
     static WrapperPersistentRegion* removeHead(WrapperPersistentRegion** headPtr);
     static Address outOfLineAllocate(ThreadState*, WrapperPersistentRegion**);
     static void trace(WrapperPersistentRegion* head, Visitor* visitor)
     {
+        TRACE_EVENT0("blink_gc", "WrapperPersistentRegion::trace");

[sof, 2014/10/10 07:21:19]

TRACE_EVENT0() will always be in scope?

[haraken, 2014/10/10 07:27:42]

Not always. If the TRACE_EVENT0 measures the time spent in one method, we don't
add a scope for the TRACE_EVENT0.

         for (WrapperPersistentRegion* current = head; current; current = current->m_next)
             current->traceRegion(visitor);
     }
 
 private:
     void traceRegion(Visitor* visitor)
     {
         size_t live = 0;
 
 #ifdef NDEBUG
@@ skipping 1097 matching lines @@
 struct ParamStorageTraits<T*> : public PointerParamStorageTraits<T*, blink::IsGarbageCollectedType<T>::value> {
 };
 
 template<typename T>
 struct ParamStorageTraits<RawPtr<T> > : public PointerParamStorageTraits<T*, blink::IsGarbageCollectedType<T>::value> {
 };
 
 } // namespace WTF
 
 #endif