1/* 2 * Copyright (C) 2013 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#include "core/inspector/AsyncCallStackTracker.h" 33 34#include "core/dom/ContextLifecycleObserver.h" 35#include "core/dom/ExecutionContext.h" 36 37namespace WebCore { 38 39class AsyncCallStackTracker::ExecutionContextData : public ContextLifecycleObserver { 40 WTF_MAKE_FAST_ALLOCATED; 41public: 42 ExecutionContextData(AsyncCallStackTracker* tracker, ExecutionContext* executionContext) 43 : ContextLifecycleObserver(executionContext) 44 , m_tracker(tracker) 45 { 46 } 47 48 virtual void contextDestroyed() OVERRIDE 49 { 50 m_tracker->contextDestroyed(executionContext()); 51 ContextLifecycleObserver::contextDestroyed(); 52 } 53 54private: 55 friend class AsyncCallStackTracker; 56 AsyncCallStackTracker* m_tracker; 57 HashSet<int> m_intervalTimerIds; 58 HashMap<int, RefPtr<AsyncCallChain> > m_timerCallChains; 59 HashMap<int, RefPtr<AsyncCallChain> > m_animationFrameCallChains; 60}; 61 62AsyncCallStackTracker::AsyncCallStack::AsyncCallStack(const String& description, const ScriptValue& callFrames) 63 : m_description(description) 64 , m_callFrames(callFrames) 65{ 66} 67 68AsyncCallStackTracker::AsyncCallStack::~AsyncCallStack() 69{ 70} 71 72AsyncCallStackTracker::AsyncCallStackTracker() 73 : m_maxAsyncCallStackDepth(0) 74{ 75} 76 77void AsyncCallStackTracker::setAsyncCallStackDepth(int depth) 78{ 79 if (depth <= 0) { 80 m_maxAsyncCallStackDepth = 0; 81 clear(); 82 } else { 83 m_maxAsyncCallStackDepth = depth; 84 } 85} 86 87const AsyncCallStackTracker::AsyncCallChain* AsyncCallStackTracker::currentAsyncCallChain() const 88{ 89 if (m_currentAsyncCallChain) 90 ensureMaxAsyncCallChainDepth(m_currentAsyncCallChain.get(), m_maxAsyncCallStackDepth); 91 return m_currentAsyncCallChain.get(); 92} 93 94void AsyncCallStackTracker::didInstallTimer(ExecutionContext* context, int timerId, bool singleShot, const ScriptValue& callFrames) 95{ 96 DEFINE_STATIC_LOCAL(String, setTimeoutName, ("setTimeout")); 97 DEFINE_STATIC_LOCAL(String, setIntervalName, ("setInterval")); 98 99 ASSERT(context); 100 ASSERT(isEnabled()); 101 if (!validateCallFrames(callFrames)) 102 return; 103 ASSERT(timerId > 0); 104 ExecutionContextData* data = createContextDataIfNeeded(context); 105 data->m_timerCallChains.set(timerId, createAsyncCallChain(singleShot ? setTimeoutName : setIntervalName, callFrames)); 106 if (!singleShot) 107 data->m_intervalTimerIds.add(timerId); 108} 109 110void AsyncCallStackTracker::didRemoveTimer(ExecutionContext* context, int timerId) 111{ 112 ASSERT(context); 113 if (!isEnabled() || timerId <= 0) 114 return; 115 ExecutionContextData* data = m_executionContextDataMap.get(context); 116 if (!data) 117 return; 118 data->m_intervalTimerIds.remove(timerId); 119 data->m_timerCallChains.remove(timerId); 120} 121 122void AsyncCallStackTracker::willFireTimer(ExecutionContext* context, int timerId) 123{ 124 ASSERT(context); 125 if (!isEnabled()) 126 return; 127 ASSERT(timerId > 0); 128 ASSERT(!m_currentAsyncCallChain); 129 ExecutionContextData* data = m_executionContextDataMap.get(context); 130 if (!data) 131 return; 132 if (data->m_intervalTimerIds.contains(timerId)) 133 m_currentAsyncCallChain = data->m_timerCallChains.get(timerId); 134 else 135 m_currentAsyncCallChain = data->m_timerCallChains.take(timerId); 136} 137 138void AsyncCallStackTracker::didRequestAnimationFrame(ExecutionContext* context, int callbackId, const ScriptValue& callFrames) 139{ 140 DEFINE_STATIC_LOCAL(String, requestAnimationFrameName, ("requestAnimationFrame")); 141 142 ASSERT(context); 143 ASSERT(isEnabled()); 144 if (!validateCallFrames(callFrames)) 145 return; 146 ASSERT(callbackId > 0); 147 ExecutionContextData* data = createContextDataIfNeeded(context); 148 data->m_animationFrameCallChains.set(callbackId, createAsyncCallChain(requestAnimationFrameName, callFrames)); 149} 150 151void AsyncCallStackTracker::didCancelAnimationFrame(ExecutionContext* context, int callbackId) 152{ 153 ASSERT(context); 154 if (!isEnabled() || callbackId <= 0) 155 return; 156 if (ExecutionContextData* data = m_executionContextDataMap.get(context)) 157 data->m_animationFrameCallChains.remove(callbackId); 158} 159 160void AsyncCallStackTracker::willFireAnimationFrame(ExecutionContext* context, int callbackId) 161{ 162 ASSERT(context); 163 if (!isEnabled()) 164 return; 165 ASSERT(callbackId > 0); 166 ASSERT(!m_currentAsyncCallChain); 167 if (ExecutionContextData* data = m_executionContextDataMap.get(context)) 168 m_currentAsyncCallChain = data->m_animationFrameCallChains.take(callbackId); 169} 170 171void AsyncCallStackTracker::didFireAsyncCall() 172{ 173 m_currentAsyncCallChain = 0; 174} 175 176PassRefPtr<AsyncCallStackTracker::AsyncCallChain> AsyncCallStackTracker::createAsyncCallChain(const String& description, const ScriptValue& callFrames) 177{ 178 ASSERT(isEnabled()); 179 RefPtr<AsyncCallChain> chain = adoptRef(m_currentAsyncCallChain ? new AsyncCallStackTracker::AsyncCallChain(*m_currentAsyncCallChain) : new AsyncCallStackTracker::AsyncCallChain()); 180 ensureMaxAsyncCallChainDepth(chain.get(), m_maxAsyncCallStackDepth - 1); 181 chain->m_callStacks.prepend(adoptRef(new AsyncCallStackTracker::AsyncCallStack(description, callFrames))); 182 return chain.release(); 183} 184 185void AsyncCallStackTracker::ensureMaxAsyncCallChainDepth(AsyncCallChain* chain, unsigned maxDepth) 186{ 187 while (chain->m_callStacks.size() > maxDepth) 188 chain->m_callStacks.removeLast(); 189} 190 191bool AsyncCallStackTracker::validateCallFrames(const ScriptValue& callFrames) 192{ 193 return !callFrames.hasNoValue(); 194} 195 196void AsyncCallStackTracker::contextDestroyed(ExecutionContext* context) 197{ 198 ASSERT(context); 199 if (ExecutionContextData* data = m_executionContextDataMap.take(context)) 200 delete data; 201} 202 203AsyncCallStackTracker::ExecutionContextData* AsyncCallStackTracker::createContextDataIfNeeded(ExecutionContext* context) 204{ 205 ExecutionContextData* data = m_executionContextDataMap.get(context); 206 if (!data) { 207 data = new AsyncCallStackTracker::ExecutionContextData(this, context); 208 m_executionContextDataMap.set(context, data); 209 } 210 return data; 211} 212 213void AsyncCallStackTracker::clear() 214{ 215 m_currentAsyncCallChain = 0; 216 Vector<ExecutionContextData*> contextsData; 217 copyValuesToVector(m_executionContextDataMap, contextsData); 218 m_executionContextDataMap.clear(); 219 for (Vector<ExecutionContextData*>::const_iterator it = contextsData.begin(); it != contextsData.end(); ++it) 220 delete *it; 221} 222 223} // namespace WebCore 224