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| 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 namespace WebCore { |
| 35 |
| 36 #ifdef DEBUG_ASYNC_CALLS_DEBUGGER_SUPPORT |
| 37 namespace { |
| 38 unsigned totalAsyncCallStacks = 0; |
| 39 } |
| 40 #endif |
| 41 |
| 42 AsyncCallStackTracker::AsyncCallStack::AsyncCallStack(const ScriptValue& callFra
mes) |
| 43 : m_callFrames(callFrames) |
| 44 { |
| 45 #ifdef DEBUG_ASYNC_CALLS_DEBUGGER_SUPPORT |
| 46 fprintf(stderr, "AsyncCallStack::AsyncCallStack() %u\n", ++totalAsyncCallSta
cks); |
| 47 #endif |
| 48 } |
| 49 |
| 50 AsyncCallStackTracker::AsyncCallStack::~AsyncCallStack() |
| 51 { |
| 52 #ifdef DEBUG_ASYNC_CALLS_DEBUGGER_SUPPORT |
| 53 fprintf(stderr, "AsyncCallStack::~AsyncCallStack() %u\n", --totalAsyncCallSt
acks); |
| 54 #endif |
| 55 } |
| 56 |
| 57 AsyncCallStackTracker::AsyncCallStackTracker() |
| 58 : m_maxAsyncCallStackDepth(0) |
| 59 { |
| 60 #ifdef DEBUG_ASYNC_CALLS_DEBUGGER_SUPPORT |
| 61 m_maxAsyncCallStackDepth = 4; |
| 62 #endif |
| 63 } |
| 64 |
| 65 void AsyncCallStackTracker::setAsyncCallStackDepth(int depth) |
| 66 { |
| 67 if (depth <= 0) { |
| 68 m_maxAsyncCallStackDepth = 0; |
| 69 clear(); |
| 70 } else { |
| 71 m_maxAsyncCallStackDepth = depth; |
| 72 } |
| 73 } |
| 74 |
| 75 const AsyncCallStackTracker::AsyncCallChain* AsyncCallStackTracker::currentAsync
CallChain() const |
| 76 { |
| 77 if (m_currentAsyncCallChain) |
| 78 ensureMaxAsyncCallChainDepth(m_currentAsyncCallChain.get(), m_maxAsyncCa
llStackDepth); |
| 79 return m_currentAsyncCallChain.get(); |
| 80 } |
| 81 |
| 82 void AsyncCallStackTracker::didInstallTimer(int timerId, bool singleShot, const
ScriptValue& callFrames) |
| 83 { |
| 84 ASSERT(isEnabled()); |
| 85 if (!validateCallFrames(callFrames)) |
| 86 return; |
| 87 ASSERT(timerId > 0); |
| 88 m_timerCallChains.set(timerId, createAsyncCallChain(callFrames)); |
| 89 if (!singleShot) |
| 90 m_intervalTimerIds.add(timerId); |
| 91 } |
| 92 |
| 93 void AsyncCallStackTracker::didRemoveTimer(int timerId) |
| 94 { |
| 95 if (!isEnabled() || timerId <= 0) |
| 96 return; |
| 97 m_intervalTimerIds.remove(timerId); |
| 98 m_timerCallChains.remove(timerId); |
| 99 } |
| 100 |
| 101 void AsyncCallStackTracker::willFireTimer(int timerId) |
| 102 { |
| 103 if (!isEnabled()) |
| 104 return; |
| 105 ASSERT(timerId > 0); |
| 106 ASSERT(!m_currentAsyncCallChain); |
| 107 if (m_intervalTimerIds.contains(timerId)) |
| 108 m_currentAsyncCallChain = m_timerCallChains.get(timerId); |
| 109 else |
| 110 m_currentAsyncCallChain = m_timerCallChains.take(timerId); |
| 111 } |
| 112 |
| 113 void AsyncCallStackTracker::didRequestAnimationFrame(int callbackId, const Scrip
tValue& callFrames) |
| 114 { |
| 115 ASSERT(isEnabled()); |
| 116 if (!validateCallFrames(callFrames)) |
| 117 return; |
| 118 ASSERT(callbackId > 0); |
| 119 m_animationFrameCallChains.set(callbackId, createAsyncCallChain(callFrames))
; |
| 120 } |
| 121 |
| 122 void AsyncCallStackTracker::didCancelAnimationFrame(int callbackId) |
| 123 { |
| 124 if (!isEnabled() || callbackId <= 0) |
| 125 return; |
| 126 m_animationFrameCallChains.remove(callbackId); |
| 127 } |
| 128 |
| 129 void AsyncCallStackTracker::willFireAnimationFrame(int callbackId) |
| 130 { |
| 131 if (!isEnabled()) |
| 132 return; |
| 133 ASSERT(callbackId > 0); |
| 134 ASSERT(!m_currentAsyncCallChain); |
| 135 m_currentAsyncCallChain = m_animationFrameCallChains.take(callbackId); |
| 136 } |
| 137 |
| 138 void AsyncCallStackTracker::didFireAsyncCall() |
| 139 { |
| 140 m_currentAsyncCallChain = 0; |
| 141 } |
| 142 |
| 143 PassRefPtr<AsyncCallStackTracker::AsyncCallChain> AsyncCallStackTracker::createA
syncCallChain(const ScriptValue& callFrames) |
| 144 { |
| 145 ASSERT(isEnabled()); |
| 146 RefPtr<AsyncCallChain> chain = adoptRef(m_currentAsyncCallChain ? new AsyncC
allStackTracker::AsyncCallChain(*m_currentAsyncCallChain) : new AsyncCallStackTr
acker::AsyncCallChain()); |
| 147 ensureMaxAsyncCallChainDepth(chain.get(), m_maxAsyncCallStackDepth - 1); |
| 148 chain->m_callStacks.prepend(adoptRef(new AsyncCallStackTracker::AsyncCallSta
ck(callFrames))); |
| 149 return chain.release(); |
| 150 } |
| 151 |
| 152 void AsyncCallStackTracker::ensureMaxAsyncCallChainDepth(AsyncCallChain* chain,
unsigned maxDepth) |
| 153 { |
| 154 while (chain->m_callStacks.size() > maxDepth) |
| 155 chain->m_callStacks.removeLast(); |
| 156 } |
| 157 |
| 158 bool AsyncCallStackTracker::validateCallFrames(const ScriptValue& callFrames) |
| 159 { |
| 160 return !callFrames.hasNoValue() && callFrames.isObject(); |
| 161 } |
| 162 |
| 163 void AsyncCallStackTracker::clear() |
| 164 { |
| 165 m_currentAsyncCallChain = 0; |
| 166 m_intervalTimerIds.clear(); |
| 167 m_timerCallChains.clear(); |
| 168 m_animationFrameCallChains.clear(); |
| 169 } |
| 170 |
| 171 } // namespace WebCore |
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