Add counters that automatically track object sizes and counts.

src/v8-counters.h

Index: src/v8-counters.h
diff --git a/src/v8-counters.h b/src/v8-counters.h
index dc55042b462ee08a86d7685ea4176fe050c3fb6d..435d79619d16ba4e49120d4532c04e9ca4dc5c98 100644
--- a/src/v8-counters.h
+++ b/src/v8-counters.h
@@ -1,4 +1,4 @@
-// Copyright 2011 the V8 project authors. All rights reserved.
+// 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:
@@ -30,6 +30,7 @@
 
 #include "allocation.h"
 #include "counters.h"
+#include "objects.h"
 #include "v8globals.h"
 
 namespace v8 {
@@ -286,6 +287,12 @@ class Counters {
   STATS_COUNTER_LIST_2(SC)
 #undef SC
 
+#define SC(name) \
+  StatsCounter* count_of_##name() { return &count_of_##name##_; } \
+  StatsCounter* size_of_##name() { return &size_of_##name##_; }
+  INSTANCE_TYPE_LIST(SC)
+#undef SC
+
   enum Id {
 #define RATE_ID(name, caption) k_##name,
     HISTOGRAM_TIMER_LIST(RATE_ID)
@@ -294,6 +301,9 @@ class Counters {
     STATS_COUNTER_LIST_1(COUNTER_ID)
     STATS_COUNTER_LIST_2(COUNTER_ID)
 #undef COUNTER_ID
+#define COUNTER_ID(name) kCountOf##name, kSizeOf##name,
+    INSTANCE_TYPE_LIST(COUNTER_ID)
+#undef COUNTER_ID
 #define COUNTER_ID(name) k_##name,
     STATE_TAG_LIST(COUNTER_ID)
 #undef COUNTER_ID
@@ -316,6 +326,12 @@ class Counters {
   STATS_COUNTER_LIST_2(SC)
 #undef SC
 
+#define SC(name) \
+  StatsCounter size_of_##name##_; \
+  StatsCounter count_of_##name##_;
+  INSTANCE_TYPE_LIST(SC)
+#undef SC
+
   enum {
 #define COUNTER_ID(name) __##name,
     STATE_TAG_LIST(COUNTER_ID)