1/* 2* Copyright (C) 2010 Google Inc. All rights reserved. 3* 4* Redistribution and use in source and binary forms, with or without 5* modification, are permitted provided that the following conditions are 6* met: 7* 8* * Redistributions of source code must retain the above copyright 9* notice, this list of conditions and the following disclaimer. 10* * Redistributions in binary form must reproduce the above 11* copyright notice, this list of conditions and the following disclaimer 12* in the documentation and/or other materials provided with the 13* distribution. 14* * Neither the name of Google Inc. nor the names of its 15* contributors may be used to endorse or promote products derived from 16* this software without specific prior written permission. 17* 18* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29*/ 30 31#include "config.h" 32 33#if ENABLE(INSPECTOR) 34 35#include "ScriptGCEvent.h" 36#include "ScriptGCEventListener.h" 37 38#include <wtf/CurrentTime.h> 39 40namespace WebCore { 41 42ScriptGCEvent::GCEventListeners ScriptGCEvent::s_eventListeners; 43double ScriptGCEvent::s_startTime = 0.0; 44size_t ScriptGCEvent::s_usedHeapSize = 0; 45 46void ScriptGCEvent::addEventListener(ScriptGCEventListener* eventListener) 47{ 48 ASSERT(eventListener); 49 if (s_eventListeners.isEmpty()) { 50 v8::V8::AddGCPrologueCallback(ScriptGCEvent::gcPrologueCallback); 51 v8::V8::AddGCEpilogueCallback(ScriptGCEvent::gcEpilogueCallback); 52 } 53 s_eventListeners.append(eventListener); 54} 55 56void ScriptGCEvent::removeEventListener(ScriptGCEventListener* eventListener) 57{ 58 ASSERT(eventListener); 59 ASSERT(!s_eventListeners.isEmpty()); 60 size_t i = s_eventListeners.find(eventListener); 61 ASSERT(i != notFound); 62 s_eventListeners.remove(i); 63 if (s_eventListeners.isEmpty()) { 64 v8::V8::RemoveGCPrologueCallback(ScriptGCEvent::gcPrologueCallback); 65 v8::V8::RemoveGCEpilogueCallback(ScriptGCEvent::gcEpilogueCallback); 66 } 67} 68 69void ScriptGCEvent::getHeapSize(size_t& usedHeapSize, size_t& totalHeapSize, size_t& heapSizeLimit) 70{ 71 v8::HeapStatistics heapStatistics; 72 v8::V8::GetHeapStatistics(&heapStatistics); 73 usedHeapSize = heapStatistics.used_heap_size(); 74 totalHeapSize = heapStatistics.total_heap_size(); 75 heapSizeLimit = heapStatistics.heap_size_limit(); 76} 77 78size_t ScriptGCEvent::getUsedHeapSize() 79{ 80 v8::HeapStatistics heapStatistics; 81 v8::V8::GetHeapStatistics(&heapStatistics); 82 return heapStatistics.used_heap_size(); 83} 84 85void ScriptGCEvent::gcPrologueCallback(v8::GCType type, v8::GCCallbackFlags flags) 86{ 87 s_startTime = WTF::currentTimeMS(); 88 s_usedHeapSize = getUsedHeapSize(); 89} 90 91void ScriptGCEvent::gcEpilogueCallback(v8::GCType type, v8::GCCallbackFlags flags) 92{ 93 double endTime = WTF::currentTimeMS(); 94 size_t collectedBytes = s_usedHeapSize - getUsedHeapSize(); 95 GCEventListeners listeners(s_eventListeners); 96 for (GCEventListeners::iterator i = listeners.begin(); i != listeners.end(); ++i) 97 (*i)->didGC(s_startTime, endTime, collectedBytes); 98} 99 100} // namespace WebCore 101 102#endif // ENABLE(INSPECTOR) 103