I'd like to add addr field into EntryInfo struct.

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 704 matching lines @@
 
   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;
 
  private:
   struct EntryInfo {
-    explicit EntryInfo(SnapshotObjectId id) : id(id), accessed(true) { }
-    EntryInfo(SnapshotObjectId id, bool accessed)
-      : id(id),
-        accessed(accessed) { }
+    EntryInfo(SnapshotObjectId id, Address addr)
+      : id(id), addr(addr), accessed(true) { }
+    EntryInfo(SnapshotObjectId id, Address addr, bool accessed)
+      : id(id), addr(addr), accessed(accessed) { }
     SnapshotObjectId id;
+    Address addr;
     bool accessed;
   };
 
   void AddEntry(Address addr, SnapshotObjectId id);
   SnapshotObjectId FindEntry(Address addr);
   void RemoveDeadEntries();
 
   static bool AddressesMatch(void* key1, void* key2) {
     return key1 == key2;
   }
@@ skipping 424 matching lines @@
 
   friend class HeapSnapshotJSONSerializerEnumerator;
   friend class HeapSnapshotJSONSerializerIterator;
 
   DISALLOW_COPY_AND_ASSIGN(HeapSnapshotJSONSerializer);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PROFILE_GENERATOR_H_