Fix --track_gc_object_stats option.

src/mark-compact.cc

 // Copyright 2012 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 1613 matching lines @@
       heap->RecordObjectStats(FIXED_ARRAY_TYPE,
                               DESCRIPTOR_ARRAY_SUB_TYPE,
                               fixed_array_size);
     }
     if (map_obj->HasTransitionArray()) {
       int fixed_array_size = map_obj->transitions()->Size();
       heap->RecordObjectStats(FIXED_ARRAY_TYPE,
                               TRANSITION_ARRAY_SUB_TYPE,
                               fixed_array_size);
     }
-    if (map_obj->code_cache() != heap->empty_fixed_array()) {
+    if (map_obj->has_code_cache()) {
+      CodeCache* cache = CodeCache::cast(map_obj->code_cache());
       heap->RecordObjectStats(
           FIXED_ARRAY_TYPE,
           MAP_CODE_CACHE_SUB_TYPE,
-          FixedArray::cast(map_obj->code_cache())->Size());
+          cache->default_cache()->Size());
+      if (!cache->normal_type_cache()->IsUndefined()) {
+        heap->RecordObjectStats(
+            FIXED_ARRAY_TYPE,
+            MAP_CODE_CACHE_SUB_TYPE,
+            FixedArray::cast(cache->normal_type_cache())->Size());
+      }
     }
     ObjectStatsVisitBase(kVisitMap, map, obj);
   }
 };
 
 
 template<>
 class MarkCompactMarkingVisitor::ObjectStatsTracker<
     MarkCompactMarkingVisitor::kVisitCode> {
  public:
@@ skipping 2666 matching lines @@
   while (buffer != NULL) {
     SlotsBuffer* next_buffer = buffer->next();
     DeallocateBuffer(buffer);
     buffer = next_buffer;
   }
   *buffer_address = NULL;
 }
 
 
 } }  // namespace v8::internal