Add code age subtype tracking to --track-gc-object-stats

src/heap.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 7919 matching lines @@
   counters->count_of_FIXED_ARRAY_##name()->Increment(     \
       static_cast<int>(object_counts_[index]));           \
   counters->count_of_FIXED_ARRAY_##name()->Decrement(     \
       static_cast<int>(object_counts_last_time_[index])); \
   counters->size_of_FIXED_ARRAY_##name()->Increment(      \
       static_cast<int>(object_sizes_[index]));            \
   counters->size_of_FIXED_ARRAY_##name()->Decrement(      \
       static_cast<int>(object_sizes_last_time_[index]));
   FIXED_ARRAY_SUB_INSTANCE_TYPE_LIST(ADJUST_LAST_TIME_OBJECT_COUNT)
 #undef ADJUST_LAST_TIME_OBJECT_COUNT
+#define ADJUST_LAST_TIME_OBJECT_COUNT(name)                 \
+  index = FIRST_CODE_AGE_SUB_TYPE + Code::k##name##CodeAge; \
+  counters->count_of_CODE_AGE_##name()->Increment(          \
+      static_cast<int>(object_counts_[index]));             \
+  counters->count_of_CODE_AGE_##name()->Decrement(          \
+      static_cast<int>(object_counts_last_time_[index]));   \
+  counters->size_of_CODE_AGE_##name()->Increment(           \
+      static_cast<int>(object_sizes_[index]));              \
+  counters->size_of_CODE_AGE_##name()->Decrement(          \
+      static_cast<int>(object_sizes_last_time_[index]));
+  CODE_AGE_LIST_WITH_NO_AGE(ADJUST_LAST_TIME_OBJECT_COUNT)
+#undef ADJUST_LAST_TIME_OBJECT_COUNT
 
   OS::MemCopy(object_counts_last_time_, object_counts_, sizeof(object_counts_));
   OS::MemCopy(object_sizes_last_time_, object_sizes_, sizeof(object_sizes_));
   ClearObjectStats();
 }
 
 
 Heap::RelocationLock::RelocationLock(Heap* heap) : heap_(heap) {
   if (FLAG_concurrent_recompilation) {
     heap_->relocation_mutex_->Lock();
 #ifdef DEBUG
     heap_->relocation_mutex_locked_by_optimizer_thread_ =
         heap_->isolate()->optimizing_compiler_thread()->IsOptimizerThread();
 #endif  // DEBUG
   }
 }
 
 } }  // namespace v8::internal