src/extensions/statistics-extension.cc

// Copyright 2012 the V8 project authors. All rights reserved.
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#include "statistics-extension.h"

namespace v8 {
namespace internal {

const char* const StatisticsExtension::kSource =
    "native function getV8Statistics();";


v8::Handle<v8::FunctionTemplate> StatisticsExtension::GetNativeFunction(
    v8::Handle<v8::String> str) {
  ASSERT(strcmp(*v8::String::AsciiValue(str), "getV8Statistics") == 0);
  return v8::FunctionTemplate::New(StatisticsExtension::GetCounters);
}


v8::Handle<v8::Value> StatisticsExtension::GetCounters(
    const v8::Arguments& args) {
  Isolate* isolate = Isolate::Current();
  Heap* heap = isolate->heap();
  if (args.Length() > 0) {  // GC if first argument evaluates to true.
    if (args[0]->IsBoolean() && args[0]->ToBoolean()->Value()) {
      heap->CollectAllGarbage(Heap::kNoGCFlags, "counters extension");
    }
  }

  Counters* counters = isolate->counters();
  v8::Local<v8::Object> result = v8::Object::New();

  StatsCounter* counter = NULL;

#define ADD_COUNTER(name, caption)                                             \
  counter = counters->name();                                                  \
  if (counter->Enabled())                                                      \
    result->Set(v8::String::New(#name),                                        \
        v8::Number::New(*counter->GetInternalPointer()));

  STATS_COUNTER_LIST_1(ADD_COUNTER)
  STATS_COUNTER_LIST_2(ADD_COUNTER)
#undef ADD_COUNTER
#define ADD_COUNTER(name)                                                      \
  counter = counters->count_of_##name();                                       \
  if (counter->Enabled())                                                      \
    result->Set(v8::String::New("count_of_" #name),                            \
        v8::Number::New(*counter->GetInternalPointer()));                      \
  counter = counters->size_of_##name();                                        \
  if (counter->Enabled())                                                      \
    result->Set(v8::String::New("size_of_" #name),                             \
        v8::Number::New(*counter->GetInternalPointer()));

  INSTANCE_TYPE_LIST(ADD_COUNTER)
#undef ADD_COUNTER
#define ADD_COUNTER(name)                                                      \
  result->Set(v8::String::New("count_of_CODE_TYPE_" #name),                    \
      v8::Number::New(                                                         \
          *counters->count_of_CODE_TYPE_##name()->GetInternalPointer()));      \
  result->Set(v8::String::New("size_of_CODE_TYPE_" #name),                     \
        v8::Number::New(                                                       \
            *counters->size_of_CODE_TYPE_##name()->GetInternalPointer()));

  CODE_KIND_LIST(ADD_COUNTER)
#undef ADD_COUNTER
#define ADD_COUNTER(name)                                                      \
  result->Set(v8::String::New("count_of_FIXED_ARRAY_" #name),                  \
      v8::Number::New(                                                         \
          *counters->count_of_FIXED_ARRAY_##name()->GetInternalPointer()));    \
  result->Set(v8::String::New("size_of_FIXED_ARRAY_" #name),                   \
        v8::Number::New(                                                       \
            *counters->size_of_FIXED_ARRAY_##name()->GetInternalPointer()));

  FIXED_ARRAY_SUB_INSTANCE_TYPE_LIST(ADD_COUNTER)
#undef ADD_COUNTER

  return result;
}


void StatisticsExtension::Register() {
  static StatisticsExtension statistics_extension;
  static v8::DeclareExtension declaration(&statistics_extension);
}

} }  // namespace v8::internal