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32 #include "bindings/core/v8/ScriptGCEvent.h"
34 #include "bindings/core/v8/V8Binding.h"
35 #include "core/inspector/ScriptGCEventListener.h"
37 #include "wtf/CurrentTime.h"
41 static GCEventData* isolateGCEventData()
43 V8PerIsolateData* isolateData = V8PerIsolateData::from(v8::Isolate::GetCurrent());
45 return isolateData->gcEventData();
48 void ScriptGCEvent::addEventListener(ScriptGCEventListener* eventListener)
50 GCEventData::GCEventListeners& listeners = isolateGCEventData()->listeners();
51 if (listeners.isEmpty()) {
52 v8::V8::AddGCPrologueCallback(ScriptGCEvent::gcPrologueCallback);
53 v8::V8::AddGCEpilogueCallback(ScriptGCEvent::gcEpilogueCallback);
55 listeners.append(eventListener);
58 void ScriptGCEvent::removeEventListener(ScriptGCEventListener* eventListener)
60 ASSERT(eventListener);
61 GCEventData::GCEventListeners& listeners = isolateGCEventData()->listeners();
62 ASSERT(!listeners.isEmpty());
63 size_t i = listeners.find(eventListener);
64 ASSERT(i != kNotFound);
66 if (listeners.isEmpty()) {
67 v8::V8::RemoveGCPrologueCallback(ScriptGCEvent::gcPrologueCallback);
68 v8::V8::RemoveGCEpilogueCallback(ScriptGCEvent::gcEpilogueCallback);
72 void ScriptGCEvent::getHeapSize(HeapInfo& info)
74 v8::HeapStatistics heapStatistics;
75 v8::Isolate::GetCurrent()->GetHeapStatistics(&heapStatistics);
76 info.usedJSHeapSize = heapStatistics.used_heap_size();
77 info.totalJSHeapSize = heapStatistics.total_physical_size();
78 info.jsHeapSizeLimit = heapStatistics.heap_size_limit();
81 size_t ScriptGCEvent::getUsedHeapSize()
83 v8::HeapStatistics heapStatistics;
84 v8::Isolate::GetCurrent()->GetHeapStatistics(&heapStatistics);
85 return heapStatistics.used_heap_size();
88 void ScriptGCEvent::gcPrologueCallback(v8::GCType type, v8::GCCallbackFlags flags)
90 GCEventData* gcEventData = isolateGCEventData();
91 gcEventData->setStartTime(WTF::monotonicallyIncreasingTime());
92 gcEventData->setUsedHeapSize(getUsedHeapSize());
95 void ScriptGCEvent::gcEpilogueCallback(v8::GCType type, v8::GCCallbackFlags flags)
97 GCEventData* gcEventData = isolateGCEventData();
98 if (!gcEventData->usedHeapSize())
100 double endTime = WTF::monotonicallyIncreasingTime();
101 size_t usedHeapSize = getUsedHeapSize();
102 size_t collectedBytes = usedHeapSize > gcEventData->usedHeapSize() ? 0 : gcEventData->usedHeapSize() - usedHeapSize;
103 GCEventData::GCEventListeners& listeners = gcEventData->listeners();
104 for (GCEventData::GCEventListeners::iterator i = listeners.begin(); i != listeners.end(); ++i)
105 (*i)->didGC(gcEventData->startTime(), endTime, collectedBytes);
106 gcEventData->clear();