#include "config.h"
#if ENABLE(INSPECTOR)
#include "ScriptGCEvent.h"
#include "ScriptGCEventListener.h"
#include "V8Binding.h"
#include <wtf/CurrentTime.h>
namespace WebCore {
static GCEventData& isolateGCEventData()
{
V8BindingPerIsolateData* isolateData = V8BindingPerIsolateData::current();
ASSERT(isolateData);
return isolateData->gcEventData();
}
void ScriptGCEvent::addEventListener(ScriptGCEventListener* eventListener)
{
GCEventData::GCEventListeners& listeners = isolateGCEventData().listeners();
if (listeners.isEmpty()) {
v8::V8::AddGCPrologueCallback(ScriptGCEvent::gcPrologueCallback);
v8::V8::AddGCEpilogueCallback(ScriptGCEvent::gcEpilogueCallback);
}
listeners.append(eventListener);
}
void ScriptGCEvent::removeEventListener(ScriptGCEventListener* eventListener)
{
ASSERT(eventListener);
GCEventData::GCEventListeners& listeners = isolateGCEventData().listeners();
ASSERT(!listeners.isEmpty());
size_t i = listeners.find(eventListener);
ASSERT(i != notFound);
listeners.remove(i);
if (listeners.isEmpty()) {
v8::V8::RemoveGCPrologueCallback(ScriptGCEvent::gcPrologueCallback);
v8::V8::RemoveGCEpilogueCallback(ScriptGCEvent::gcEpilogueCallback);
}
}
void ScriptGCEvent::getHeapSize(size_t& usedHeapSize, size_t& totalHeapSize, size_t& heapSizeLimit)
{
v8::HeapStatistics heapStatistics;
v8::V8::GetHeapStatistics(&heapStatistics);
usedHeapSize = heapStatistics.used_heap_size();
totalHeapSize = heapStatistics.total_heap_size();
heapSizeLimit = heapStatistics.heap_size_limit();
}
size_t ScriptGCEvent::getUsedHeapSize()
{
v8::HeapStatistics heapStatistics;
v8::V8::GetHeapStatistics(&heapStatistics);
return heapStatistics.used_heap_size();
}
void ScriptGCEvent::gcPrologueCallback(v8::GCType type, v8::GCCallbackFlags flags)
{
GCEventData& gcEventData = isolateGCEventData();
gcEventData.startTime = WTF::monotonicallyIncreasingTime();
gcEventData.usedHeapSize = getUsedHeapSize();
}
void ScriptGCEvent::gcEpilogueCallback(v8::GCType type, v8::GCCallbackFlags flags)
{
GCEventData& gcEventData = isolateGCEventData();
if (!gcEventData.usedHeapSize)
return;
double endTime = WTF::monotonicallyIncreasingTime();
size_t usedHeapSize = getUsedHeapSize();
size_t collectedBytes = usedHeapSize > gcEventData.usedHeapSize ? 0 : gcEventData.usedHeapSize - usedHeapSize;
GCEventData::GCEventListeners& listeners = gcEventData.listeners();
for (GCEventData::GCEventListeners::iterator i = listeners.begin(); i != listeners.end(); ++i)
(*i)->didGC(gcEventData.startTime, endTime, collectedBytes);
gcEventData.clear();
}
}
#endif // ENABLE(INSPECTOR)