Introduce EmbedderReachableReferenceReporter

src/heap/mark-compact.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HEAP_MARK_COMPACT_H_
 #define V8_HEAP_MARK_COMPACT_H_
 
 #include <deque>
 
 #include "src/base/bits.h"
@@ skipping 472 matching lines @@
   // when mark bits are still intact.
   bool IsSlotInBlackObject(MemoryChunk* p, Address slot);
   HeapObject* FindBlackObjectBySlotSlow(Address slot);
 
   // Removes all the slots in the slot buffers that are within the given
   // address range.
   void RemoveObjectSlots(Address start_slot, Address end_slot);
 
   Sweeper& sweeper() { return sweeper_; }
 
-  // ===========================================================================
-  // Embedder heap tracer support. =============================================
-  // ===========================================================================
-
-  void SetEmbedderHeapTracer(EmbedderHeapTracer* tracer);
-  EmbedderHeapTracer* embedder_heap_tracer() { return embedder_heap_tracer_; }
-  bool UsingEmbedderHeapTracer() { return embedder_heap_tracer(); }
-
-  // In order to avoid running out of memory we force tracing wrappers if there
-  // are too many of them.
-  bool RequiresImmediateWrapperProcessing();
-
-  void RegisterWrappersWithEmbedderHeapTracer();
-
-  void TracePossibleWrapper(JSObject* js_object);
-
-  size_t wrappers_to_trace() { return wrappers_to_trace_.size(); }
-
  private:
   class EvacuateNewSpacePageVisitor;
   class EvacuateNewSpaceVisitor;
   class EvacuateOldSpaceVisitor;
   class EvacuateRecordOnlyVisitor;
   class EvacuateVisitorBase;
   class HeapObjectVisitor;
   class ObjectStatsVisitor;
 
   explicit MarkCompactCollector(Heap* heap);
@@ skipping 219 matching lines @@
   // candidates.
   bool compacting_;
 
   bool black_allocation_;
 
   bool have_code_to_deoptimize_;
 
   base::VirtualMemory* marking_deque_memory_;
   size_t marking_deque_memory_committed_;
   MarkingDeque marking_deque_;
-  std::vector<std::pair<void*, void*>> wrappers_to_trace_;
 
   CodeFlusher* code_flusher_;
 
-  EmbedderHeapTracer* embedder_heap_tracer_;
-
   List<Page*> evacuation_candidates_;
   List<Page*> newspace_evacuation_candidates_;
 
   Sweeper sweeper_;
 
   friend class Heap;
   friend class StoreBuffer;
 };
 
 
 class EvacuationScope BASE_EMBEDDED {
  public:
   explicit EvacuationScope(MarkCompactCollector* collector)
       : collector_(collector) {
     collector_->set_evacuation(true);
   }
 
   ~EvacuationScope() { collector_->set_evacuation(false); }
 
  private:
   MarkCompactCollector* collector_;
 };
 
 V8_EXPORT_PRIVATE const char* AllocationSpaceName(AllocationSpace space);
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_MARK_COMPACT_H_