Oilpan: support eager tracing of objects when marking.

Source/platform/heap/Heap.h

 /*
  * Copyright (C) 2013 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 79 matching lines @@
 #else
 const size_t sizeMask = ~static_cast<size_t>(7);
 #endif
 const uint8_t freelistZapValue = 42;
 const uint8_t finalizedZapValue = 24;
 // The orphaned zap value must be zero in the lowest bits to allow for using
 // the mark bit when tracing.
 const uint8_t orphanedZapValue = 240;
 const int numberOfPagesToConsiderForCoalescing = 100;
 
-enum CallbackInvocationMode {
-    GlobalMarking,
-    ThreadLocalMarking,
-};
-
 class CallbackStack;
 class PageMemory;
 template<ThreadAffinity affinity> class ThreadLocalPersistents;
 template<typename T, typename RootsAccessor = ThreadLocalPersistents<ThreadingTrait<T>::Affinity > > class Persistent;
 
 #if ENABLE(GC_PROFILE_HEAP)
 class TracedValue;
 #endif
 
 // Blink heap pages are set up with a guard page before and after the
@@ skipping 768 matching lines @@
     static void pushWeakPointerCallback(void* closure, void* containerObject, WeakPointerCallback);
 
     // Similar to the more general pushWeakPointerCallback, but cell
     // pointer callbacks are added to a static callback work list and the weak
     // callback is performed on the thread performing garbage collection. This
     // is OK because cells are just cleared and no deallocation can happen.
     static void pushWeakCellPointerCallback(void** cell, WeakPointerCallback);
 
     // Pop the top of a marking stack and call the callback with the visitor
     // and the object. Returns false when there is nothing more to do.
-    template<CallbackInvocationMode Mode> static bool popAndInvokeTraceCallback(CallbackStack*, Visitor*);
+    static bool popAndInvokeTraceCallback(CallbackStack*, Visitor*);
 
     // Remove an item from the post-marking callback stack and call
     // the callback with the visitor and the object pointer. Returns
     // false when there is nothing more to do.
     static bool popAndInvokePostMarkingCallback(Visitor*);
 
     // Remove an item from the weak callback work list and call the callback
     // with the visitor and the closure pointer. Returns false when there is
     // nothing more to do.
     static bool popAndInvokeWeakPointerCallback(Visitor*);
 
     // Register an ephemeron table for fixed-point iteration.
     static void registerWeakTable(void* containerObject, EphemeronCallback, EphemeronCallback);
 #if ENABLE(ASSERT)
     static bool weakTableRegistered(const void*);
 #endif
 
     template<typename T, typename HeapTraits> static Address allocate(size_t);
     // FIXME: remove this once c++11 is allowed everywhere:
     template<typename T> static Address allocate(size_t);
 
     template<typename T> static Address reallocate(void* previous, size_t);
 
     static void collectGarbage(ThreadState::StackState, ThreadState::GCType = ThreadState::ForcedGC);
     static void collectGarbageForTerminatingThread(ThreadState*);
     static void collectAllGarbage();
-    template<CallbackInvocationMode Mode> static void processMarkingStack();
-    static void postMarkingProcessing();
-    static void globalWeakProcessing();
+
+    static void processMarkingStack(Visitor*);
+    static void postMarkingProcessing(Visitor*);
+    static void globalWeakProcessing(Visitor*);
     static void setForcePreciseGCForTesting();
 
     static void preGC();
     static void postGC();
 
     // Conservatively checks whether an address is a pointer in any of the thread
     // heaps. If so marks the object pointed to as live.
     static Address checkAndMarkPointer(Visitor*, Address);
 
 #if ENABLE(GC_PROFILE_MARKING)
@@ skipping 1383 matching lines @@
 template<typename T, size_t inlineCapacity>
 struct GCInfoTrait<HeapVector<T, inlineCapacity> > : public GCInfoTrait<Vector<T, inlineCapacity, HeapAllocator> > { };
 template<typename T, size_t inlineCapacity>
 struct GCInfoTrait<HeapDeque<T, inlineCapacity> > : public GCInfoTrait<Deque<T, inlineCapacity, HeapAllocator> > { };
 template<typename T, typename U, typename V>
 struct GCInfoTrait<HeapHashCountedSet<T, U, V> > : public GCInfoTrait<HashCountedSet<T, U, V, HeapAllocator> > { };
 
 } // namespace blink
 
 #endif // Heap_h