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

src/v8-counters.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 58 matching lines @@
     CODE_KIND_LIST(SC)
 #undef SC
 
 #define SC(name) \
     count_of_FIXED_ARRAY_##name##_ = \
         StatsCounter(isolate, "c:" "V8.CountOf_FIXED_ARRAY-" #name); \
     size_of_FIXED_ARRAY_##name##_ = \
         StatsCounter(isolate, "c:" "V8.SizeOf_FIXED_ARRAY-" #name);
     FIXED_ARRAY_SUB_INSTANCE_TYPE_LIST(SC)
 #undef SC
+
+#define SC(name) \
+    count_of_CODE_AGE_##name##_ = \
+        StatsCounter(isolate, "c:" "V8.CountOf_CODE_AGE-" #name); \
+    size_of_CODE_AGE_##name##_ = \
+        StatsCounter(isolate, "c:" "V8.SizeOf_CODE_AGE-" #name);
+    CODE_AGE_LIST_WITH_NO_AGE(SC)
+#undef SC
 }
 
 
 void Counters::ResetHistograms() {
 #define HT(name, caption) name##_.Reset();
     HISTOGRAM_TIMER_LIST(HT)
 #undef HT
 
 #define HP(name, caption) name##_.Reset();
     HISTOGRAM_PERCENTAGE_LIST(HP)
 #undef HP
 
 #define HM(name, caption) name##_.Reset();
     HISTOGRAM_MEMORY_LIST(HM)
 #undef HM
 }
 
 } }  // namespace v8::internal