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

src/objects.cc

 // 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 10591 matching lines @@
   ASSERT(kind() == FUNCTION);
   BackEdgeTable back_edges(this, &no_gc);
   for (uint32_t i = 0; i < back_edges.length(); i++) {
     if (back_edges.pc_offset(i) == pc_offset) return back_edges.ast_id(i);
   }
   return BailoutId::None();
 }
 
 
 void Code::MakeCodeAgeSequenceYoung(byte* sequence, Isolate* isolate) {
-  PatchPlatformCodeAge(isolate, sequence, kNoAge, NO_MARKING_PARITY);
+  PatchPlatformCodeAge(isolate, sequence, kNoAgeCodeAge, NO_MARKING_PARITY);
 }
 
 
 void Code::MarkCodeAsExecuted(byte* sequence, Isolate* isolate) {
   PatchPlatformCodeAge(isolate, sequence, kExecutedOnceCodeAge,
       NO_MARKING_PARITY);
 }
 
 
 void Code::MakeOlder(MarkingParity current_parity) {
@@ skipping 24 matching lines @@
       (kind() == OPTIMIZED_FUNCTION ||
        (kind() == FUNCTION && !has_debug_break_slots()))
       ? instruction_start() + prologue_offset()
       : NULL;
 }
 
 
 Code::Age Code::GetAge() {
   byte* sequence = FindCodeAgeSequence();
   if (sequence == NULL) {
-    return Code::kNoAge;
+    return Code::kNoAgeCodeAge;
   }
   Age age;
   MarkingParity parity;
   GetCodeAgeAndParity(sequence, &age, &parity);
   return age;
 }
 
 
 void Code::GetCodeAgeAndParity(Code* code, Age* age,
                                MarkingParity* parity) {
@@ skipping 5730 matching lines @@
 #define ERROR_MESSAGES_TEXTS(C, T) T,
   static const char* error_messages_[] = {
       ERROR_MESSAGES_LIST(ERROR_MESSAGES_TEXTS)
   };
 #undef ERROR_MESSAGES_TEXTS
   return error_messages_[reason];
 }
 
 
 } }  // namespace v8::internal