Bug 69149 – [Chromium] Skia on Mac crashes randomly (in debug) on many tests

• Component: Layout and Rendering
• Status: RESOLVED FIXED

[Adam Barth]

This crash stack shows up all the time on the Mac Skia bots, on all sort of random tests.

For example, right now it's showing up for storage/domstorage/events/basic.html and fast/history/same-document-iframes-changing-fragment.html

Process:         DumpRenderTree [40525]
Path:            /b/build/slave/Webkit_Mac10_6__dbg_/build/src/xcodebuild/Debug/DumpRenderTree.app/Contents/MacOS/DumpRenderTree
Identifier:      DumpRenderTree
Version:         ??? (???)
Code Type:       X86 (Native)
Parent Process:  Python [40508]

Date/Time:       2011-09-25 19:01:00.303 -0700
OS Version:      Mac OS X Server 10.6.8 (10K549)
Report Version:  6

Exception Type:  EXC_BAD_INSTRUCTION (SIGABRT)
Exception Codes: 0x0000000000000001, 0x0000000000000000
Crashed Thread:  10

Application Specific Information:
abort() called

Thread 0:  Dispatch queue: com.apple.main-thread
0   dyld                          	0x8fe1580b ImageLoaderMachOCompressed::findClosestSymbol(void const*, void const**) const + 235
1   dyld                          	0x8fe0984e dladdr + 149
2   libSystem.B.dylib             	0x982fe24f dladdr + 85
3   libSystem.B.dylib             	0x983bd9cc backtrace_symbols + 84
4   DumpRenderTree                	0x50f493eb base::debug::(anonymous namespace)::GetBacktraceStrings(void* const*, int, std::vector<std::string, std::allocator<std::string> >*, std::string*) + 75
5   DumpRenderTree                	0x514e9e7e base::debug::StackTrace::PrintBacktrace() const + 142
6   DumpRenderTree                	0x5157c695 base::(anonymous namespace)::StackDumpSignalHandler(int, __siginfo*, __darwin_ucontext*) + 309
7   libSystem.B.dylib             	0x9835e05b _sigtramp + 43
8   ???                           	0xffffffff 0 + 4294967295
9   DumpRenderTree                	0x50f4ab5b logging::LogMessage::LogMessage(char const*, int, int) + 139
10  DumpRenderTree                	0x50f4aaa5 logging::LogMessage::LogMessage(char const*, int, int) + 85
11  DumpRenderTree                	0x5157c60e base::(anonymous namespace)::StackDumpSignalHandler(int, __siginfo*, __darwin_ucontext*) + 174
12  libSystem.B.dylib             	0x9835e05b _sigtramp + 43
13  ???                           	0xffffffff 0 + 4294967295
14  DumpRenderTree                	0x542817ab testing::internal::DefaultGlobalTestPartResultReporter::ReportTestPartResult(testing::TestPartResult const&) + 123
15  DumpRenderTree                	0x54281a33 testing::internal::DefaultPerThreadTestPartResultReporter::ReportTestPartResult(testing::TestPartResult const&) + 83
16  DumpRenderTree                	0x5427fb3e testing::UnitTest::AddTestPartResult(testing::TestPartResult::Type, char const*, int, testing::internal::String const&, testing::internal::String const&) + 718
17  DumpRenderTree                	0x5427f78f testing::internal::AssertHelper::operator=(testing::Message const&) const + 207
18  DumpRenderTree                	0x512cc1de (anonymous namespace)::UnitTestAssertHandler(std::string const&) + 142
19  DumpRenderTree                	0x50f4b1f8 logging::LogMessage::~LogMessage() + 984
20  DumpRenderTree                	0x50f4a3bb logging::LogMessage::~LogMessage() + 43
21  DumpRenderTree                	0x50f501fd SkDebugf_FileLine(char const*, int, bool, char const*, ...) + 205
22  DumpRenderTree                	0x51788276 skia::BitmapPlatformDevice::BitmapPlatformDeviceData::BitmapPlatformDeviceData(CGContext*) + 198
23  DumpRenderTree                	0x51788189 skia::BitmapPlatformDevice::BitmapPlatformDeviceData::BitmapPlatformDeviceData(CGContext*) + 57
24  DumpRenderTree                	0x51788912 skia::BitmapPlatformDevice::Create(CGContext*, int, int, bool) + 578
25  DumpRenderTree                	0x51788bce skia::BitmapPlatformDevice::CreateWithData(unsigned char*, int, int, bool) + 142
26  DumpRenderTree                	0x5179e06a skia::PlatformCanvas::initialize(int, int, bool, unsigned char*) + 106
27  DumpRenderTree                	0x5179d66d skia::TryCreateBitmapCanvas(int, int, bool) + 141
28  DumpRenderTree                	0x52e8eafe WebCore::ImageBuffer::ImageBuffer(WebCore::IntSize const&, WebCore::ColorSpace, WebCore::RenderingMode, bool&) + 318
29  DumpRenderTree                	0x52e8e992 WebCore::ImageBuffer::ImageBuffer(WebCore::IntSize const&, WebCore::ColorSpace, WebCore::RenderingMode, bool&) + 98
30  DumpRenderTree                	0x52d135a4 WebCore::ImageBuffer::create(WebCore::IntSize const&, WebCore::ColorSpace, WebCore::RenderingMode) + 116
31  DumpRenderTree                	0x53a03f09 WebCore::createDeviceScaledImageBuffer(WebCore::IntSize, float) + 121
32  DumpRenderTree                	0x53a03112 WebCore::RenderBoxModelObject::paintFillLayerExtended(WebCore::PaintInfo const&, WebCore::Color const&, WebCore::FillLayer const*, WebCore::IntRect const&, WebCore::BackgroundBleedAvoidance, WebCore::InlineFlowBox*, WebCore::IntSize const&, WebCore::CompositeOperator, WebCore::RenderObject*) + 3378
33  DumpRenderTree                	0x539e9d5d WebCore::RenderBox::paintFillLayer(WebCore::PaintInfo const&, WebCore::Color const&, WebCore::FillLayer const*, WebCore::IntRect const&, WebCore::BackgroundBleedAvoidance, WebCore::CompositeOperator, WebCore::RenderObject*) + 237
34  DumpRenderTree                	0x539e8d02 WebCore::RenderBox::paintFillLayers(WebCore::PaintInfo const&, WebCore::Color const&, WebCore::FillLayer const*, WebCore::IntRect const&, WebCore::BackgroundBleedAvoidance, WebCore::CompositeOperator, WebCore::RenderObject*) + 274
35  DumpRenderTree                	0x539e94c3 WebCore::RenderBox::paintBackground(WebCore::PaintInfo const&, WebCore::IntRect const&, WebCore::BackgroundBleedAvoidance) + 339
36  DumpRenderTree                	0x539e916b WebCore::RenderBox::paintBoxDecorations(WebCore::PaintInfo&, WebCore::IntPoint const&) + 667
37  DumpRenderTree                	0x53965ba4 WebCore::RenderBlock::paintObject(WebCore::PaintInfo&, WebCore::IntPoint const&) + 196
38  DumpRenderTree                	0x539641a1 WebCore::RenderBlock::paint(WebCore::PaintInfo&, WebCore::IntPoint const&) + 321
39  DumpRenderTree                	0x53965607 WebCore::RenderBlock::paintChildren(WebCore::PaintInfo&, WebCore::IntPoint const&) + 951
40  DumpRenderTree                	0x5396522c WebCore::RenderBlock::paintContents(WebCore::PaintInfo&, WebCore::IntPoint const&) + 204
41  DumpRenderTree                	0x53965d42 WebCore::RenderBlock::paintObject(WebCore::PaintInfo&, WebCore::IntPoint const&) + 610
42  DumpRenderTree                	0x539641a1 WebCore::RenderBlock::paint(WebCore::PaintInfo&, WebCore::IntPoint const&) + 321
43  DumpRenderTree                	0x53965607 WebCore::RenderBlock::paintChildren(WebCore::PaintInfo&, WebCore::IntPoint const&) + 951
44  DumpRenderTree                	0x5396522c WebCore::RenderBlock::paintContents(WebCore::PaintInfo&, WebCore::IntPoint const&) + 204
45  DumpRenderTree                	0x53965d42 WebCore::RenderBlock::paintObject(WebCore::PaintInfo&, WebCore::IntPoint const&) + 610
46  DumpRenderTree                	0x539641a1 WebCore::RenderBlock::paint(WebCore::PaintInfo&, WebCore::IntPoint const&) + 321
47  DumpRenderTree                	0x53a81c78 WebCore::RenderLayer::paintLayer(WebCore::RenderLayer*, WebCore::GraphicsContext*, WebCore::IntRect const&, unsigned int, WebCore::RenderObject*, WTF::HashMap<WebCore::OverlapTestRequestClient*, WebCore::IntRect, WTF::PtrHash<WebCore::OverlapTestRequestClient*>, WTF::HashTraits<WebCore::OverlapTestRequestClient*>, WTF::HashTraits<WebCore::IntRect> >*, unsigned int) + 3240
48  DumpRenderTree                	0x53a83684 WebCore::RenderLayer::paintList(WTF::Vector<WebCore::RenderLayer*, 0ul>*, WebCore::RenderLayer*, WebCore::GraphicsContext*, WebCore::IntRect const&, unsigned int, WebCore::RenderObject*, WTF::HashMap<WebCore::OverlapTestRequestClient*, WebCore::IntRect, WTF::PtrHash<WebCore::OverlapTestRequestClient*>, WTF::HashTraits<WebCore::OverlapTestRequestClient*>, WTF::HashTraits<WebCore::IntRect> >*, unsigned int) + 292
49  DumpRenderTree                	0x53a81f9d WebCore::RenderLayer::paintLayer(WebCore::RenderLayer*, WebCore::GraphicsContext*, WebCore::IntRect const&, unsigned int, WebCore::RenderObject*, WTF::HashMap<WebCore::OverlapTestRequestClient*, WebCore::IntRect, WTF::PtrHash<WebCore::OverlapTestRequestClient*>, WTF::HashTraits<WebCore::OverlapTestRequestClient*>, WTF::HashTraits<WebCore::IntRect> >*, unsigned int) + 4045
50  DumpRenderTree                	0x53a80ed9 WebCore::RenderLayer::paint(WebCore::GraphicsContext*, WebCore::IntRect const&, unsigned int, WebCore::RenderObject*) + 169
51  DumpRenderTree                	0x536231e7 WebCore::FrameView::paintContents(WebCore::GraphicsContext*, WebCore::IntRect const&) + 1447
52  DumpRenderTree                	0x52ca397e WebCore::ScrollView::paint(WebCore::GraphicsContext*, WebCore::IntRect const&) + 1038
53  DumpRenderTree                	0x510d74bd WebKit::WebFrameImpl::paintWithContext(WebCore::GraphicsContext&, WebKit::WebRect const&) + 189
54  DumpRenderTree                	0x510d7626 WebKit::WebFrameImpl::paint(SkCanvas*, WebKit::WebRect const&) + 150
55  DumpRenderTree                	0x51139fb9 WebKit::WebViewImpl::paint(SkCanvas*, WebKit::WebRect const&) + 313
56  DumpRenderTree                	0x51001efc WebViewHost::paintRect(WebKit::WebRect const&) + 300 (WebViewHost.cpp:1494)
57  DumpRenderTree                	0x50fe60bc TestShell::dump() + 1948 (TestShell.cpp:547)
58  DumpRenderTree                	0x50fe58f2 TestShell::testFinished() + 82 (TestShell.cpp:327)
59  DumpRenderTree                	0x50fc2494 LayoutTestController::WorkQueue::processWorkSoon() + 196 (LayoutTestController.cpp:263)
60  DumpRenderTree                	0x50fc2ae0 LayoutTestController::locationChangeDone() + 144 (LayoutTestController.cpp:649)
61  DumpRenderTree                	0x50ffe318 WebViewHost::locationChangeDone(WebKit::WebFrame*) + 88 (WebViewHost.cpp:1352)
62  DumpRenderTree                	0x50ffebc3 WebViewHost::didFinishLoad(WebKit::WebFrame*) + 163 (WebViewHost.cpp:1005)
63  DumpRenderTree                	0x50ffec19 non-virtual thunk to WebViewHost::didFinishLoad(WebKit::WebFrame*) + 41
64  DumpRenderTree                	0x51051a64 WebKit::FrameLoaderClientImpl::dispatchDidFinishLoad() + 148
65  DumpRenderTree                	0x534f0f1d WebCore::FrameLoader::checkLoadCompleteForThisFrame() + 2077
66  DumpRenderTree                	0x534e7a2d WebCore::FrameLoader::checkLoadComplete() + 413
67  DumpRenderTree                	0x534e745d WebCore::FrameLoader::checkCompleted() + 397
68  DumpRenderTree                	0x534e5e9e WebCore::FrameLoader::finishedParsing() + 190
69  DumpRenderTree                	0x52940c32 WebCore::Document::finishedParsing() + 626
70  DumpRenderTree                	0x52c4305a WebCore::HTMLTreeBuilder::finished() + 170
71  DumpRenderTree                	0x52c0a5ae WebCore::HTMLDocumentParser::end() + 254
72  DumpRenderTree                	0x52c093ac WebCore::HTMLDocumentParser::attemptToRunDeferredScriptsAndEnd() + 300
73  DumpRenderTree                	0x52c0911c WebCore::HTMLDocumentParser::prepareToStopParsing() + 300
74  DumpRenderTree                	0x52c09c91 WebCore::HTMLDocumentParser::endIfDelayed() + 129
75  DumpRenderTree                	0x52c09bdb WebCore::HTMLDocumentParser::resumeParsingAfterYield() + 91
76  DumpRenderTree                	0x52c1c767 WebCore::HTMLParserScheduler::continueNextChunkTimerFired(WebCore::Timer<WebCore::HTMLParserScheduler>*) + 215
77  DumpRenderTree                	0x52c1cde7 WebCore::Timer<WebCore::HTMLParserScheduler>::fired() + 135
78  DumpRenderTree                	0x52cb5a11 WebCore::ThreadTimers::sharedTimerFiredInternal() + 337
79  DumpRenderTree                	0x52cb579f WebCore::ThreadTimers::sharedTimerFired() + 47
80  DumpRenderTree                	0x5454ff49 webkit_glue::WebKitPlatformSupportImpl::DoTimeout() + 73
81  DumpRenderTree                	0x54550a71 void DispatchToMethod<webkit_glue::WebKitPlatformSupportImpl, void (webkit_glue::WebKitPlatformSupportImpl::*)()>(webkit_glue::WebKitPlatformSupportImpl*, void (webkit_glue::WebKitPlatformSupportImpl::*)(), Tuple0 const&) + 145
82  DumpRenderTree                	0x54550932 base::BaseTimer<webkit_glue::WebKitPlatformSupportImpl, false>::TimerTask::Run() + 130
83  DumpRenderTree                	0x515be4c2 base::subtle::TaskClosureAdapter::Run() + 50
84  DumpRenderTree                	0x51538a6f base::internal::Invoker1<false, base::internal::InvokerStorage1<void (base::subtle::TaskClosureAdapter::*)(), base::subtle::TaskClosureAdapter*>, void (base::subtle::TaskClosureAdapter::*)()>::DoInvoke(base::internal::InvokerStorageBase*) + 143
85  DumpRenderTree                	0x5153223b base::Callback<void ()()>::Run() const + 75
86  DumpRenderTree                	0x5152fc98 MessageLoop::RunTask(MessageLoop::PendingTask const&) + 472
87  DumpRenderTree                	0x5152feb1 MessageLoop::DeferOrRunPendingTask(MessageLoop::PendingTask const&) + 97
88  DumpRenderTree                	0x515300dd MessageLoop::DoWork() + 301
89  DumpRenderTree                	0x514bf03b base::MessagePumpCFRunLoopBase::RunWork() + 107
90  DumpRenderTree                	0x514be732 base::MessagePumpCFRunLoopBase::RunWorkSource(void*) + 50
91  com.apple.CoreFoundation      	0x9048845b __CFRunLoopDoSources0 + 1563
92  com.apple.CoreFoundation      	0x90485f1f __CFRunLoopRun + 1071
93  com.apple.CoreFoundation      	0x904853f4 CFRunLoopRunSpecific + 452
94  com.apple.CoreFoundation      	0x90485221 CFRunLoopRunInMode + 97
95  com.apple.HIToolbox           	0x98006e04 RunCurrentEventLoopInMode + 392
96  com.apple.HIToolbox           	0x98006bb9 ReceiveNextEventCommon + 354
97  com.apple.HIToolbox           	0x98006a3e BlockUntilNextEventMatchingListInMode + 81
98  com.apple.AppKit              	0x990cf595 _DPSNextEvent + 847
99  com.apple.AppKit              	0x990cedd6 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 156
100 com.apple.AppKit              	0x990911f3 -[NSApplication run] + 821
101 DumpRenderTree                	0x514bfd5e base::MessagePumpNSApplication::DoRun(base::MessagePump::Delegate*) + 350
102 DumpRenderTree                	0x514bed2d base::MessagePumpCFRunLoopBase::Run(base::MessagePump::Delegate*) + 189
103 DumpRenderTree                	0x5152f773 MessageLoop::RunInternal() + 291
104 DumpRenderTree                	0x5152ec6b MessageLoop::RunHandler() + 43
105 DumpRenderTree                	0x5152ebb0 MessageLoop::Run() + 64
106 DumpRenderTree                	0x512c9407 webkit_support::RunMessageLoop() + 39
107 DumpRenderTree                	0x50ff3575 TestShell::waitTestFinished() + 389 (TestShellMac.mm:122)
108 DumpRenderTree                	0x50fe510e TestShell::runFileTest(TestParams const&) + 814 (TestShell.cpp:236)
109 DumpRenderTree                	0x50fa6753 runTest(TestShell&, TestParams&, std::string const&, bool) + 1395 (DumpRenderTree.cpp:125)
110 DumpRenderTree                	0x50fa6023 main + 3347 (DumpRenderTree.cpp:256)
111 DumpRenderTree                	0x50f89826 start + 54

Thread 1:  Dispatch queue: com.apple.libdispatch-manager
0   libSystem.B.dylib             	0x9831e382 kevent + 10
1   libSystem.B.dylib             	0x9831ea9c _dispatch_mgr_invoke + 215
2   libSystem.B.dylib             	0x9831df59 _dispatch_queue_invoke + 163
3   libSystem.B.dylib             	0x9831dcfe _dispatch_worker_thread2 + 240
4   libSystem.B.dylib             	0x9831d781 _pthread_wqthread + 390
5   libSystem.B.dylib             	0x9831d5c6 start_wqthread + 30

Thread 2:  SimpleDBThread
0   libSystem.B.dylib             	0x98325aa2 __semwait_signal + 10
1   libSystem.B.dylib             	0x9832575e _pthread_cond_wait + 1191
2   libSystem.B.dylib             	0x983273f8 pthread_cond_wait$UNIX2003 + 73
3   DumpRenderTree                	0x515a8252 base::ConditionVariable::Wait() + 82
4   DumpRenderTree                	0x515a9fa7 base::WaitableEvent::TimedWait(base::TimeDelta const&) + 807
5   DumpRenderTree                	0x515a9c46 base::WaitableEvent::Wait() + 86
6   DumpRenderTree                	0x515423ef base::MessagePumpDefault::Run(base::MessagePump::Delegate*) + 591
7   DumpRenderTree                	0x5152f773 MessageLoop::RunInternal() + 291
8   DumpRenderTree                	0x5152ec6b MessageLoop::RunHandler() + 43
9   DumpRenderTree                	0x5152ebb0 MessageLoop::Run() + 64
10  DumpRenderTree                	0x515c0572 base::Thread::Run(MessageLoop*) + 50
11  DumpRenderTree                	0x515c071f base::Thread::ThreadMain() + 271
12  DumpRenderTree                	0x515bfa06 base::(anonymous namespace)::ThreadFunc(void*) + 134
13  libSystem.B.dylib             	0x98325259 _pthread_start + 345
14  libSystem.B.dylib             	0x983250de thread_start + 34

Thread 3:  SamplerThread
0   libSystem.B.dylib             	0x982f7b36 semaphore_wait_trap + 10
1   DumpRenderTree                	0x521626bf v8::internal::MacOSSemaphore::Wait() + 47
2   DumpRenderTree                	0x51faabb7 v8::internal::RuntimeProfiler::WaitForSomeIsolateToEnterJS() + 199
3   DumpRenderTree                	0x51faad73 v8::internal::RuntimeProfilerRateLimiter::SuspendIfNecessary() + 51
4   DumpRenderTree                	0x52162c7c v8::internal::SamplerThread::Run() + 108
5   DumpRenderTree                	0x52161529 v8::internal::ThreadEntry(void*) + 201
6   libSystem.B.dylib             	0x98325259 _pthread_start + 345
7   libSystem.B.dylib             	0x983250de thread_start + 34

Thread 4:  cache
0   libSystem.B.dylib             	0x9831e382 kevent + 10
1   DumpRenderTree                	0x51605f92 kq_dispatch + 178
2   DumpRenderTree                	0x516006db event_base_loop + 395
3   DumpRenderTree                	0x514b9dc0 base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) + 816
4   DumpRenderTree                	0x5152f773 MessageLoop::RunInternal() + 291
5   DumpRenderTree                	0x5152ec6b MessageLoop::RunHandler() + 43
6   DumpRenderTree                	0x5152ebb0 MessageLoop::Run() + 64
7   DumpRenderTree                	0x515c0572 base::Thread::Run(MessageLoop*) + 50
8   DumpRenderTree                	0x515c071f base::Thread::ThreadMain() + 271
9   DumpRenderTree                	0x515bfa06 base::(anonymous namespace)::ThreadFunc(void*) + 134
10  libSystem.B.dylib             	0x98325259 _pthread_start + 345
11  libSystem.B.dylib             	0x983250de thread_start + 34

Thread 5:  IOThread
0   libSystem.B.dylib             	0x9831e382 kevent + 10
1   DumpRenderTree                	0x51605f92 kq_dispatch + 178
2   DumpRenderTree                	0x516006db event_base_loop + 395
3   DumpRenderTree                	0x514b9dc0 base::MessagePumpLibevent::Run(base::MessagePump::Delegate*) + 816
4   DumpRenderTree                	0x5152f773 MessageLoop::RunInternal() + 291
5   DumpRenderTree                	0x5152ec6b MessageLoop::RunHandler() + 43
6   DumpRenderTree                	0x5152ebb0 MessageLoop::Run() + 64
7   DumpRenderTree                	0x515c0572 base::Thread::Run(MessageLoop*) + 50
8   DumpRenderTree                	0x515c071f base::Thread::ThreadMain() + 271
9   DumpRenderTree                	0x515bfa06 base::(anonymous namespace)::ThreadFunc(void*) + 134
10  libSystem.B.dylib             	0x98325259 _pthread_start + 345
11  libSystem.B.dylib             	0x983250de thread_start + 34

Thread 6:  NetworkConfigWatcher
0   libSystem.B.dylib             	0x982f7afa mach_msg_trap + 10
1   libSystem.B.dylib             	0x982f8267 mach_msg + 68
2   com.apple.CoreFoundation      	0x9048630f __CFRunLoopRun + 2079
3   com.apple.CoreFoundation      	0x904853f4 CFRunLoopRunSpecific + 452
4   com.apple.CoreFoundation      	0x90485221 CFRunLoopRunInMode + 97
5   com.apple.Foundation          	0x95c73227 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 279
6   DumpRenderTree                	0x514bfa99 base::MessagePumpNSRunLoop::DoRun(base::MessagePump::Delegate*) + 169
7   DumpRenderTree                	0x514bed2d base::MessagePumpCFRunLoopBase::Run(base::MessagePump::Delegate*) + 189
8   DumpRenderTree                	0x5152f773 MessageLoop::RunInternal() + 291
9   DumpRenderTree                	0x5152ec6b MessageLoop::RunHandler() + 43
10  DumpRenderTree                	0x5152ebb0 MessageLoop::Run() + 64
11  DumpRenderTree                	0x515c0572 base::Thread::Run(MessageLoop*) + 50
12  DumpRenderTree                	0x515c071f base::Thread::ThreadMain() + 271
13  DumpRenderTree                	0x515bfa06 base::(anonymous namespace)::ThreadFunc(void*) + 134
14  libSystem.B.dylib             	0x98325259 _pthread_start + 345
15  libSystem.B.dylib             	0x983250de thread_start + 34

Thread 7:  AppCacheDBThread
0   libSystem.B.dylib             	0x98325aa2 __semwait_signal + 10
1   libSystem.B.dylib             	0x9832575e _pthread_cond_wait + 1191
2   libSystem.B.dylib             	0x983273f8 pthread_cond_wait$UNIX2003 + 73
3   DumpRenderTree                	0x515a8252 base::ConditionVariable::Wait() + 82
4   DumpRenderTree                	0x515a9fa7 base::WaitableEvent::TimedWait(base::TimeDelta const&) + 807
5   DumpRenderTree                	0x515a9c46 base::WaitableEvent::Wait() + 86
6   DumpRenderTree                	0x515423ef base::MessagePumpDefault::Run(base::MessagePump::Delegate*) + 591
7   DumpRenderTree                	0x5152f773 MessageLoop::RunInternal() + 291
8   DumpRenderTree                	0x5152ec6b MessageLoop::RunHandler() + 43
9   DumpRenderTree                	0x5152ebb0 MessageLoop::Run() + 64
10  DumpRenderTree                	0x515c0572 base::Thread::Run(MessageLoop*) + 50
11  DumpRenderTree                	0x515c071f base::Thread::ThreadMain() + 271
12  DumpRenderTree                	0x515bfa06 base::(anonymous namespace)::ThreadFunc(void*) + 134
13  libSystem.B.dylib             	0x98325259 _pthread_start + 345
14  libSystem.B.dylib             	0x983250de thread_start + 34

Thread 8:  WorkerPool/22335
0   libSystem.B.dylib             	0x98325aa2 __semwait_signal + 10
1   libSystem.B.dylib             	0x9832575e _pthread_cond_wait + 1191
2   libSystem.B.dylib             	0x983252b1 pthread_cond_timedwait$UNIX2003 + 72
3   DumpRenderTree                	0x515a854c base::ConditionVariable::TimedWait(base::TimeDelta const&) + 524
4   DumpRenderTree                	0x515c3c54 base::PosixDynamicThreadPool::WaitForTask() + 356
5   DumpRenderTree                	0x515c42d7 base::(anonymous namespace)::WorkerThread::ThreadMain() + 151
6   DumpRenderTree                	0x515bfa06 base::(anonymous namespace)::ThreadFunc(void*) + 134
7   libSystem.B.dylib             	0x98325259 _pthread_start + 345
8   libSystem.B.dylib             	0x983250de thread_start + 34

Thread 9:  WorkerPool/25643
0   libSystem.B.dylib             	0x98325aa2 __semwait_signal + 10
1   libSystem.B.dylib             	0x9832575e _pthread_cond_wait + 1191
2   libSystem.B.dylib             	0x983252b1 pthread_cond_timedwait$UNIX2003 + 72
3   DumpRenderTree                	0x515a854c base::ConditionVariable::TimedWait(base::TimeDelta const&) + 524
4   DumpRenderTree                	0x515c3c54 base::PosixDynamicThreadPool::WaitForTask() + 356
5   DumpRenderTree                	0x515c42d7 base::(anonymous namespace)::WorkerThread::ThreadMain() + 151
6   DumpRenderTree                	0x515bfa06 base::(anonymous namespace)::ThreadFunc(void*) + 134
7   libSystem.B.dylib             	0x98325259 _pthread_start + 345
8   libSystem.B.dylib             	0x983250de thread_start + 34

Thread 10 Crashed:
0   libSystem.B.dylib             	0x983650ee __semwait_signal_nocancel + 10
1   libSystem.B.dylib             	0x98364fd2 nanosleep$NOCANCEL$UNIX2003 + 166
2   libSystem.B.dylib             	0x983dffb2 usleep$NOCANCEL$UNIX2003 + 61
3   libSystem.B.dylib             	0x98401685 __abort + 136
4   libSystem.B.dylib             	0x984016f5 abort_report_np + 0
5   DumpRenderTree                	0x54292dcb testing::internal::posix::Abort() + 11
6   DumpRenderTree                	0x5427dee0 testing::internal::GTestLog::~GTestLog() + 112
7   DumpRenderTree                	0x5427de4b testing::internal::GTestLog::~GTestLog() + 43
8   DumpRenderTree                	0x542b1ec7 testing::internal::Mutex::~Mutex() + 199
9   DumpRenderTree                	0x54292d9b testing::internal::Mutex::~Mutex() + 43
10  DumpRenderTree                	0x5428dff1 testing::UnitTest::~UnitTest() + 97
11  DumpRenderTree                	0x5428d4db testing::UnitTest::~UnitTest() + 43
12  libSystem.B.dylib             	0x98316bff __cxa_finalize + 208
13  libSystem.B.dylib             	0x98316b14 exit + 33
14  DumpRenderTree                	0x50ff33b5 -[WatchDogTarget run:] + 517 (TestShellMac.mm:91)
15  com.apple.Foundation          	0x95c39564 -[NSThread main] + 45
16  com.apple.Foundation          	0x95c39514 __NSThread__main__ + 1499
17  libSystem.B.dylib             	0x98325259 _pthread_start + 345
18  libSystem.B.dylib             	0x983250de thread_start + 34

Thread 10 crashed with X86 Thread State (32-bit):
  eax: 0x0000003c  ebx: 0x98364f39  ecx: 0xb0102adc  edx: 0x983650ee
  edi: 0x000004d7  esi: 0xb0102b38  ebp: 0xb0102b18  esp: 0xb0102adc
   ss: 0x00000023  efl: 0x00000247  eip: 0x983650ee   cs: 0x0000000b
   ds: 0x00000023   es: 0x00000023   fs: 0x00000023   gs: 0x0000000f
  cr2: 0x0a80f000

Binary Images:
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0x91918000 - 0x91949ff7  libGLImage.dylib ??? (???) <0EE86397-A867-0BBA-E5B1-B800E43FC5CF> /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGLImage.dylib
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0x91eb1000 - 0x91ec5fe7  libbsm.0.dylib ??? (???) <0476BD2A-BF85-4DDF-3CBC-00B690284B93> /usr/lib/libbsm.0.dylib
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0x97fa5000 - 0x97fa8ff7  libCoreVMClient.dylib ??? (???) <F58BDFC1-7408-53C8-0B08-48BA2F25CA43> /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libCoreVMClient.dylib
0x97fa9000 - 0x97fd1ff7  libxslt.1.dylib 3.24.0 (compatibility 3.0.0) <315D97C2-4E1F-A95F-A759-4A3FA5639E75> /usr/lib/libxslt.1.dylib
0x97fd2000 - 0x982f6fef  com.apple.HIToolbox 1.6.5 (???) <21164164-41CE-61DE-C567-32E89755CB34> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox
0x982f7000 - 0x9849eff7  libSystem.B.dylib 125.2.11 (compatibility 1.0.0) <2DCD13E3-1BD1-6F25-119A-3863A3848B90> /usr/lib/libSystem.B.dylib
0x9849f000 - 0x984b1ff7  com.apple.MultitouchSupport.framework 207.11 (207.11) <6FF4F2D6-B8CD-AE13-56CB-17437EE5B741> /System/Library/PrivateFrameworks/MultitouchSupport.framework/Versions/A/MultitouchSupport
0x984b2000 - 0x984b5fe7  libmathCommon.A.dylib 315.0.0 (compatibility 1.0.0) <1622A54F-1A98-2CBE-B6A4-2122981A500E> /usr/lib/system/libmathCommon.A.dylib
0x984b6000 - 0x984fafe7  com.apple.Metadata 10.6.3 (507.15) <460BEF23-B89F-6F4C-4940-45556C0671B5> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/Metadata.framework/Versions/A/Metadata
0x985f0000 - 0x9862aff7  libcups.2.dylib 2.8.0 (compatibility 2.0.0) <6875335E-0993-0D77-4E80-41763A8477CF> /usr/lib/libcups.2.dylib
0x9887d000 - 0x988cafeb  com.apple.DirectoryService.PasswordServerFramework 6.1 (6.1) <136BFA48-D456-B677-3B5D-40A6946C3A09> /System/Library/PrivateFrameworks/PasswordServer.framework/Versions/A/PasswordServer
0x988cb000 - 0x989f9fe7  com.apple.CoreData 102.1 (251) <87FE6861-F2D6-773D-ED45-345272E56463> /System/Library/Frameworks/CoreData.framework/Versions/A/CoreData
0x989fa000 - 0x98ab2feb  libFontParser.dylib ??? (???) <D57D3834-9395-FD58-092A-49B3708E8C89> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ATS.framework/Versions/A/Resources/libFontParser.dylib
0x98d6c000 - 0x98d6eff7  libRadiance.dylib ??? (???) <5920EB69-8D7F-5EFD-70AD-590FCB5C9E6C> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ImageIO.framework/Versions/A/Resources/libRadiance.dylib
0x98d71000 - 0x98d93fef  com.apple.DirectoryService.Framework 3.6 (621.11) <CA979EAC-9537-43B6-CD69-C144ACB75E09> /System/Library/Frameworks/DirectoryService.framework/Versions/A/DirectoryService
0x98db4000 - 0x98db4ff7  com.apple.Carbon 150 (152) <734BDB59-8B13-54FA-0653-AA8623DF9846> /System/Library/Frameworks/Carbon.framework/Versions/A/Carbon
0x98e7a000 - 0x98e7fff7  com.apple.OpenDirectory 10.6 (10.6) <C1B46982-7D3B-3CC4-3BC2-3E4B595F0231> /System/Library/Frameworks/OpenDirectory.framework/Versions/A/OpenDirectory
0x98e80000 - 0x98ebdff7  com.apple.SystemConfiguration 1.10.8 (1.10.2) <50E4D49B-4F61-446F-1C21-1B2BA814713D> /System/Library/Frameworks/SystemConfiguration.framework/Versions/A/SystemConfiguration
0x98f35000 - 0x98fc7fe7  com.apple.print.framework.PrintCore 6.3 (312.7) <7410D1B2-655D-68DA-D4B9-2C65747B6817> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/PrintCore.framework/Versions/A/PrintCore
0x99087000 - 0x9996aff7  com.apple.AppKit 6.6.8 (1038.36) <A353465E-CFC9-CB75-949D-786F6F7732F6> /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
0x9996b000 - 0x99987fe3  com.apple.openscripting 1.3.1 (???) <2A748037-D1C0-6D47-2C4A-0562AF799AC9> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/OpenScripting.framework/Versions/A/OpenScripting
0x999a6000 - 0x99a28ffb  SecurityFoundation ??? (???) <2E1F1AF0-A258-D215-2600-5DF03896D1F1> /System/Library/Frameworks/SecurityFoundation.framework/Versions/A/SecurityFoundation
0x99a29000 - 0x99a34ff7  libCSync.A.dylib 545.0.0 (compatibility 64.0.0) <287DECA3-7821-32B6-724D-AE03A9A350F9> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/Versions/A/Resources/libCSync.A.dylib
0x99a35000 - 0x99bb7fe7  libicucore.A.dylib 40.0.0 (compatibility 1.0.0) <D5980817-6D19-9636-51C3-E82BAE26776B> /usr/lib/libicucore.A.dylib
0x99bb8000 - 0x99bbfff3  com.apple.print.framework.Print 6.1 (237.1) <F5AAE53D-5530-9004-A9E3-2C1690C5328E> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/Print.framework/Versions/A/Print
0x99cee000 - 0x99ceeff7  com.apple.vecLib 3.6 (vecLib 3.6) <FF4DC8B6-0AB0-DEE8-ADA8-7B57645A1F36> /System/Library/Frameworks/vecLib.framework/Versions/A/vecLib
0x9aa4a000 - 0x9ab06fff  com.apple.ColorSync 4.6.6 (4.6.6) <7CD8B191-039A-02C3-EA5E-4194EC59995B> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ColorSync.framework/Versions/A/ColorSync
0x9ab07000 - 0x9ab2dffb  com.apple.DictionaryServices 1.1.2 (1.1.2) <43E1D565-6E01-3681-F2E5-72AE4C3A097A> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/DictionaryServices.framework/Versions/A/DictionaryServices
0xffff0000 - 0xffff1fff  libSystem.B.dylib ??? (???) <2DCD13E3-1BD1-6F25-119A-3863A3848B90> /usr/lib/libSystem.B.dylib

[Mike Reed]

Just a guess, but it may be that CGBitmapContextCreate is returning NULL (called from CGContextForData in bitmap_platform_device_mac.cc)

[Adam Barth]

Is there a plan for fixing this issue soon?  You've asked the WebKit gardener to maintain this configuration, but this bug causes a ton of noise because a bunch of tests are randomly crashing.

[Cary Clark]

I am unfamiliar with this area of code. I've contacted one of the original authors to get some advice on how to fix this.

Additionally, epoger is working on a temporary test_expectation to allow CRASH.

[Mark Mentovai]

Are we reaching skia::(anonymous namespace)::CGContextForData(void* data, int width, int height) with 0 for width? Or, for that matter, for height or data?

[Cary Clark]

Mark: I haven't been able to reproduce this locally. This crash has only happened on the WebKit bot.

[Adam Barth]

It happens sporadically.  You might need to run the entire test suite in debug mode a number of times to see it trigger.

[Cary Clark]

I'm running new-run-webkit-tests 10 times (different out directory each time), recording if the data, width, or height parameter for CGContextForData is ever 0.

[Cary Clark]

Sometimes both width and height are zero, although this does not necessarily trigger the assert.

[Mark Mentovai]

I’m kind of at a loss too, then.

[Cary Clark]

Proposed fix here (will require Chromium DEPS roll) 
http://codereview.chromium.org/8118014

(In reply to comment #6)
> It happens sporadically.  You might need to run the entire test suite in debug mode a number of times to see it trigger.

Adam- Did the crash stack you pasted at the top of this bug come from a buildbot run?  If so, which one?  (Since Cary hasn't been able to reproduce this bug locally, we need as many clues as we can get.)

I went looking through the history of the tests you mentioned...

http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=storage%2Fdomstorage%2Fevents%2Fbasic.html

http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=fast%2Fhistory%2Fsame-document-iframes-changing-fragment.html

In doing so, I found one run that exhibited both failures: http://build.chromium.org/p/chromium.webkit/builders/Webkit%20Mac10.6%20(dbg)/builds/5488

(but it was on Sept 30, not Sept 25)

[Adam Barth]

Here are two instances for the most recent bot runs:

http://build.chromium.org/f/chromium/layout_test_results/Webkit_Mac10_6__CG__dbg_/results/layout-test-results/storage/domstorage/events/basic-crash-log.txt
http://build.chromium.org/f/chromium/layout_test_results/Webkit_Mac10_5__CG__dbg__2_/results/layout-test-results/fast/reflections/reflection-masks-outset-crash-log.txt

[Adam Barth]

Oops.  One of those is a plugin issue, but the other one is this issue.

(In reply to comment #12)
> Here are two instances for the most recent bot runs:
> 
> http://build.chromium.org/f/chromium/layout_test_results/Webkit_Mac10_6__CG__dbg_/results/layout-test-results/storage/domstorage/events/basic-crash-log.txt
> http://build.chromium.org/f/chromium/layout_test_results/Webkit_Mac10_5__CG__dbg__2_/results/layout-test-results/fast/reflections/reflection-masks-outset-crash-log.txt

Why do both of the following links lead to seemingly identical content?

http://build.chromium.org/f/chromium/layout_test_results/Webkit_Mac10_6__CG__dbg_/results/layout-test-results/storage/domstorage/events/basic-body-attribute-crash-log.txt

http://build.chromium.org/f/chromium/layout_test_results/Webkit_Mac10_6__dbg_/results/layout-test-results/storage/domstorage/events/documentURI-crash-log.txt

Of particular concern to me:
- They both have path /b/build/slave/Webkit_Mac10_6__dbg_ in spite of the fact that one is CG
- They both show Date/Time 2011-09-25 19:01:00.303 -0700 (what is that the date/time of?)

[Adam Barth]

How strange.  Maybe there's some sort of problem with the buildbot where it's finding the wrong crash reports?

[Cary Clark]

Fixed in this CL : http://codereview.chromium.org/8118014/

[Adam Barth]

Many thanks.

(In reply to comment #16)
> Fixed in this CL : http://codereview.chromium.org/8118014/

In other words, the purported fix was committed to the Chromium tree as http://src.chromium.org/viewvc/chrome?view=rev&revision=104374 .

But I am still seeing CRASHes on the WebKit-Skia buildbot :
http://build.chromium.org/p/chromium.webkit/waterfall?show=Webkit%20Mac10.6%20(dbg)
(for example, as of ChromiumRev104478 and WebkitRev96932, http://build.chromium.org/p/chromium.webkit/builders/Webkit%20Mac10.6%20%28dbg%29/builds/5606/steps/webkit_tests/logs/stdio )

The fix probably requires a WebKit->Chromium DEPS roll.  I will prepare one.

(In reply to comment #18)
> (In reply to comment #16)
> > Fixed in this CL : http://codereview.chromium.org/8118014/
> 
> In other words, the purported fix was committed to the Chromium tree as http://src.chromium.org/viewvc/chrome?view=rev&revision=104374 .
> 
> But I am still seeing CRASHes on the WebKit-Skia buildbot :
> http://build.chromium.org/p/chromium.webkit/waterfall?show=Webkit%20Mac10.6%20(dbg)
> (for example, as of ChromiumRev104478 and WebkitRev96932, http://build.chromium.org/p/chromium.webkit/builders/Webkit%20Mac10.6%20%28dbg%29/builds/5606/steps/webkit_tests/logs/stdio )
> 
> The fix probably requires a WebKit->Chromium DEPS roll.  I will prepare one.

The purported fix was rolled into Webkit on 6 October: http://trac.webkit.org/changeset/96899/trunk/Source/WebKit/chromium/DEPS

But I still see these CRASHes (or at least the stack looks the same)...

Here's one: http://build.chromium.org/p/chromium.webkit/builders/Webkit%20Mac10.6%20%28dbg%29/builds/5697/steps/webkit_tests/logs/stdio
shows:
Regressions: Unexpected DumpRenderTree crashes : (1)
  fast/dom/multiple-ids.html = CRASH

When I look at 
http://build.chromium.org/f/chromium/layout_test_results/Webkit_Mac10_6__dbg_/results/layout-test-results/fast/dom/multiple-ids-crash-log.txt , I see a very similar stack trace...

See apparently related http://code.google.com/p/chromium/issues/detail?id=99899 ('Suddenly Crashy DumpRenderTree on Mac CG')

[Cary Clark]

I haven't heard anything more about this for quite a while, so I assume it's resolved. If that's not the case, please let me know especially if it repros easily for you.

[Adam Barth]

Yeah, I haven't seen this in a while either.  Thanks!