Allow self_size to be larger than 2GB in heap snapshots.

src/heap-snapshot-generator.h

 // Copyright 2013 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 96 matching lines @@
     kConsString = v8::HeapGraphNode::kConsString,
     kSlicedString = v8::HeapGraphNode::kSlicedString
   };
   static const int kNoEntry;
 
   HeapEntry() { }
   HeapEntry(HeapSnapshot* snapshot,
             Type type,
             const char* name,
             SnapshotObjectId id,
-            int self_size);
+            size_t self_size);
 
   HeapSnapshot* snapshot() { return snapshot_; }
   Type type() { return static_cast<Type>(type_); }
   const char* name() { return name_; }
   void set_name(const char* name) { name_ = name; }
   inline SnapshotObjectId id() { return id_; }
-  int self_size() { return self_size_; }
+  size_t self_size() { return self_size_; }
   INLINE(int index() const);
   int children_count() const { return children_count_; }
   INLINE(int set_children_index(int index));
   void add_child(HeapGraphEdge* edge) {
     children_arr()[children_count_++] = edge;
   }
   Vector<HeapGraphEdge*> children() {
     return Vector<HeapGraphEdge*>(children_arr(), children_count_); }
 
   void SetIndexedReference(
       HeapGraphEdge::Type type, int index, HeapEntry* entry);
   void SetNamedReference(
       HeapGraphEdge::Type type, const char* name, HeapEntry* entry);
 
   void Print(
       const char* prefix, const char* edge_name, int max_depth, int indent);
 
  private:
   INLINE(HeapGraphEdge** children_arr());
   const char* TypeAsString();
 
   unsigned type_: 4;
   int children_count_: 28;
   int children_index_;
-  int self_size_;
+  size_t self_size_;
   SnapshotObjectId id_;
   HeapSnapshot* snapshot_;
   const char* name_;
 };
 
 
 // HeapSnapshot represents a single heap snapshot. It is stored in
 // HeapProfiler, which is also a factory for
 // HeapSnapshots. All HeapSnapshots share strings copied from JS heap
 // to be able to return them even if they were collected.
@@ skipping 19 matching lines @@
   List<HeapGraphEdge>& edges() { return edges_; }
   List<HeapGraphEdge*>& children() { return children_; }
   void RememberLastJSObjectId();
   SnapshotObjectId max_snapshot_js_object_id() const {
     return max_snapshot_js_object_id_;
   }
 
   HeapEntry* AddEntry(HeapEntry::Type type,
                       const char* name,
                       SnapshotObjectId id,
-                      int size);
+                      size_t size);
   HeapEntry* AddRootEntry();
   HeapEntry* AddGcRootsEntry();
   HeapEntry* AddGcSubrootEntry(int tag);
   HeapEntry* AddNativesRootEntry();
   HeapEntry* GetEntryById(SnapshotObjectId id);
   List<HeapEntry*>* GetSortedEntriesList();
   void FillChildren();
 
   void Print(int max_depth);
   void PrintEntriesSize();
@@ skipping 192 matching lines @@
   static HeapObject* const kInternalRootObject;
 
  private:
   HeapEntry* AddEntry(HeapObject* object);
   HeapEntry* AddEntry(HeapObject* object,
                       HeapEntry::Type type,
                       const char* name);
   HeapEntry* AddEntry(Address address,
                       HeapEntry::Type type,
                       const char* name,
-                      int size);
+                      size_t size);
 
   const char* GetSystemEntryName(HeapObject* object);
 
   void ExtractReferences(HeapObject* obj);
   void ExtractJSGlobalProxyReferences(int entry, JSGlobalProxy* proxy);
   void ExtractJSObjectReferences(int entry, JSObject* js_obj);
   void ExtractStringReferences(int entry, String* obj);
   void ExtractContextReferences(int entry, Context* context);
   void ExtractMapReferences(int entry, Map* map);
   void ExtractSharedFunctionInfoReferences(int entry,
@@ skipping 229 matching lines @@
   friend class HeapSnapshotJSONSerializerEnumerator;
   friend class HeapSnapshotJSONSerializerIterator;
 
   DISALLOW_COPY_AND_ASSIGN(HeapSnapshotJSONSerializer);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_SNAPSHOT_GENERATOR_H_