Expose counters in javascript.

src/bootstrapper.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 24 matching lines @@
 #include "execution.h"
 #include "global-handles.h"
 #include "isolate-inl.h"
 #include "macro-assembler.h"
 #include "natives.h"
 #include "objects-visiting.h"
 #include "platform.h"
 #include "snapshot.h"
 #include "extensions/externalize-string-extension.h"
 #include "extensions/gc-extension.h"
+#include "extensions/counters-extension.h"
 
 namespace v8 {
 namespace internal {
 
 
 NativesExternalStringResource::NativesExternalStringResource(
     Bootstrapper* bootstrapper,
     const char* source,
     size_t length)
     : data_(source), length_(length) {
@@ skipping 33 matching lines @@
   }
   Handle<Object> cached_source(heap->natives_source_cache()->get(index));
   return Handle<String>::cast(cached_source);
 }
 
 
 void Bootstrapper::Initialize(bool create_heap_objects) {
   extensions_cache_.Initialize(create_heap_objects);
   GCExtension::Register();
   ExternalizeStringExtension::Register();
+  CountersExtension::Register();
 }
 
 
 char* Bootstrapper::AllocateAutoDeletedArray(int bytes) {
   char* memory = new char[bytes];
   if (memory != NULL) {
     if (delete_these_arrays_on_tear_down_ == NULL) {
       delete_these_arrays_on_tear_down_ = new List<char*>(2);
     }
     delete_these_arrays_on_tear_down_->Add(memory);
@@ skipping 1882 matching lines @@
   while (current != NULL) {
     if (current->extension()->auto_enable())
       InstallExtension(current, &extension_states);
     current = current->next();
   }
 
   if (FLAG_expose_gc) InstallExtension("v8/gc", &extension_states);
   if (FLAG_expose_externalize_string) {
     InstallExtension("v8/externalize", &extension_states);
   }
+  if (FLAG_track_gc_object_stats) {
+    InstallExtension("v8/counters", &extension_states);
+  }
 
   if (extensions == NULL) return true;
   // Install required extensions
   int count = v8::ImplementationUtilities::GetNameCount(extensions);
   const char** names = v8::ImplementationUtilities::GetNames(extensions);
   for (int i = 0; i < count; i++) {
     if (!InstallExtension(names[i], &extension_states))
       return false;
   }
 
@@ skipping 343 matching lines @@
   return from + sizeof(NestingCounterType);
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   ASSERT(!IsActive());
 }
 
 } }  // namespace v8::internal