Implement heap profiler memory usage reporting.

src/profile-generator.h

 // Copyright 2011 the V8 project authors. 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
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 54 matching lines @@
   StringsStorage();
   ~StringsStorage();
 
   const char* GetCopy(const char* src);
   const char* GetFormatted(const char* format, ...);
   const char* GetVFormatted(const char* format, va_list args);
   const char* GetName(String* name);
   const char* GetName(int index);
   inline const char* GetFunctionName(String* name);
   inline const char* GetFunctionName(const char* name);
+  size_t GetUsedMemorySize() const;
 
  private:
   static const int kMaxNameSize = 1024;
 
   INLINE(static bool StringsMatch(void* key1, void* key2)) {
     return strcmp(reinterpret_cast<char*>(key1),
                   reinterpret_cast<char*>(key2)) == 0;
   }
   const char* AddOrDisposeString(char* str, uint32_t hash);
 
@@ skipping 558 matching lines @@
   void SnapshotGenerationFinished();
   SnapshotObjectId FindEntry(Address addr);
   SnapshotObjectId FindOrAddEntry(Address addr, unsigned int size);
   void MoveObject(Address from, Address to);
   SnapshotObjectId last_assigned_id() const {
     return next_id_ - kObjectIdStep;
   }
 
   void StopHeapObjectsTracking();
   SnapshotObjectId PushHeapObjectsStats(OutputStream* stream);
+  size_t GetUsedMemorySize() const;
 
   static SnapshotObjectId GenerateId(v8::RetainedObjectInfo* info);
   static inline SnapshotObjectId GetNthGcSubrootId(int delta);
 
   static const int kObjectIdStep = 2;
   static const SnapshotObjectId kInternalRootObjectId;
   static const SnapshotObjectId kGcRootsObjectId;
   static const SnapshotObjectId kNativesRootObjectId;
   static const SnapshotObjectId kGcRootsFirstSubrootId;
   static const SnapshotObjectId kFirstAvailableObjectId;
@@ skipping 64 matching lines @@
     return ids_.FindEntry(object_addr);
   }
   SnapshotObjectId GetObjectId(Address object_addr, int object_size) {
     return ids_.FindOrAddEntry(object_addr, object_size);
   }
   Handle<HeapObject> FindHeapObjectById(SnapshotObjectId id);
   void ObjectMoveEvent(Address from, Address to) { ids_.MoveObject(from, to); }
   SnapshotObjectId last_assigned_id() const {
     return ids_.last_assigned_id();
   }
+  size_t GetUsedMemorySize() const;
 
  private:
   INLINE(static bool HeapSnapshotsMatch(void* key1, void* key2)) {
     return key1 == key2;
   }
 
   bool is_tracking_objects_;  // Whether tracking object moves is needed.
   List<HeapSnapshot*> snapshots_;
   // Mapping from snapshots' uids to HeapSnapshot* pointers.
   HashMap snapshots_uids_;
@@ skipping 345 matching lines @@
 
   friend class HeapSnapshotJSONSerializerEnumerator;
   friend class HeapSnapshotJSONSerializerIterator;
 
   DISALLOW_COPY_AND_ASSIGN(HeapSnapshotJSONSerializer);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PROFILE_GENERATOR_H_