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 #ifndef AsyncCallStackTracker_h 32 #define AsyncCallStackTracker_h 33 34 #include "bindings/v8/ScriptValue.h" 35 #include "wtf/Deque.h" 36 #include "wtf/HashMap.h" 37 #include "wtf/HashSet.h" 38 #include "wtf/Noncopyable.h" 39 #include "wtf/PassRefPtr.h" 40 #include "wtf/RefPtr.h" 41 42 namespace WebCore { 43 44 class ExecutionContext; 45 46 class AsyncCallStackTracker { 47 WTF_MAKE_NONCOPYABLE(AsyncCallStackTracker); 48 public: 49 class AsyncCallStack : public RefCounted<AsyncCallStack> { 50 public: 51 AsyncCallStack(const String&, const ScriptValue&); 52 ~AsyncCallStack(); description()53 String description() const { return m_description; } callFrames()54 ScriptValue callFrames() const { return m_callFrames; } 55 private: 56 String m_description; 57 ScriptValue m_callFrames; 58 }; 59 60 typedef Deque<RefPtr<AsyncCallStack>, 4> AsyncCallStackVector; 61 62 class AsyncCallChain : public RefCounted<AsyncCallChain> { 63 public: AsyncCallChain()64 AsyncCallChain() { } AsyncCallChain(const AsyncCallChain & t)65 AsyncCallChain(const AsyncCallChain& t) : m_callStacks(t.m_callStacks) { } callStacks()66 AsyncCallStackVector callStacks() const { return m_callStacks; } 67 private: 68 friend class AsyncCallStackTracker; 69 AsyncCallStackVector m_callStacks; 70 }; 71 72 AsyncCallStackTracker(); 73 isEnabled()74 bool isEnabled() const { return m_maxAsyncCallStackDepth; } 75 void setAsyncCallStackDepth(int); 76 const AsyncCallChain* currentAsyncCallChain() const; 77 78 void didInstallTimer(ExecutionContext*, int timerId, bool singleShot, const ScriptValue& callFrames); 79 void didRemoveTimer(ExecutionContext*, int timerId); 80 void willFireTimer(ExecutionContext*, int timerId); 81 82 void didRequestAnimationFrame(ExecutionContext*, int callbackId, const ScriptValue& callFrames); 83 void didCancelAnimationFrame(ExecutionContext*, int callbackId); 84 void willFireAnimationFrame(ExecutionContext*, int callbackId); 85 86 void didFireAsyncCall(); 87 void clear(); 88 89 private: 90 PassRefPtr<AsyncCallChain> createAsyncCallChain(const String& description, const ScriptValue& callFrames); 91 static void ensureMaxAsyncCallChainDepth(AsyncCallChain*, unsigned); 92 static bool validateCallFrames(const ScriptValue& callFrames); 93 94 class ExecutionContextData; 95 void contextDestroyed(ExecutionContext*); 96 ExecutionContextData* createContextDataIfNeeded(ExecutionContext*); 97 98 unsigned m_maxAsyncCallStackDepth; 99 RefPtr<AsyncCallChain> m_currentAsyncCallChain; 100 HashMap<ExecutionContext*, ExecutionContextData*> m_executionContextDataMap; 101 }; 102 103 } // namespace WebCore 104 105 #endif // !defined(AsyncCallStackTracker_h) 106