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Issue metadata

Status: Fixed
Owner:
Last visit > 30 days ago
Closed: Nov 2016
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Windows
Pri: 1
Type: Bug

Blocking:
issue 665688



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Flaky DCHECK in MemoryChunk::AllocateOldToNewSlots during webgl2_conformance_tests on NVIDIA GPU on Windows

Project Member Reported by ynovikov@chromium.org, Nov 28 2016

Issue description

Seeing this in https://build.chromium.org/p/chromium.gpu.fyi/builders/Win7%20Release%20%28NVIDIA%29/builds/28406

WebglConformance_deqp_functional_gles3_shadermatrix_mul_uniform_lowp (gpu_tests.webgl_conformance_integration_test.WebGLConformanceIntegrationTest) ... 

#
# Fatal error in e:\b\c\b\win\src\v8\src\heap\spaces.cc, line 1103
# Check failed: nullptr == old_to_new_slots_.Value().
#
Error initializing symbols (87).  Dumping unresolved backtrace:
	62174C60
	61412993
	6141F009
	6141F055
	779B672F
	779A2D89
	769A337A
	779892B2
	77989285
Backtrace:
	(No symbol) [0x00000000]
	v8::base::OS::Abort [0x6216D3ED+13]
	V8_Fatal [0x6216CF0C+124]
	v8::internal::MemoryChunk::AllocateOldToNewSlots [0x61412993+35]
	v8::internal::RememberedSet<1>::Insert [0x6108667F+63]
	v8::internal::StoreBuffer::MoveEntriesToRememberedSet [0x6141F009+521]
	v8::internal::StoreBuffer::Task::RunInternal [0x6141F055+37]
	base::WorkerPool::RunsTasksOnCurrentThread [0x61915805+453]
	TpAllocWork [0x779B672F+799]
	TpCallbackIndependent [0x779A2D89+2012]
	BaseThreadInitThunk [0x769A337A+18]
	RtlInitializeExceptionChain [0x779892B2+99]
	RtlInitializeExceptionChain [0x77989285+54]
[1121/032145:ERROR:process_info.cc(608)] range at 0xfffde000, size 0x230 fully unreadable
[1121/032145:ERROR:process_info.cc(608)] range at 0xfffdd000, size 0xf84 fully unreadable
[1121/032145:ERROR:process_info.cc(608)] range at 0xfffda000, size 0xf84 fully unreadable
[1121/032145:ERROR:process_info.cc(608)] range at 0xfffd7000, size 0xf84 fully unreadable
[1121/032145:ERROR:process_info.cc(608)] range at 0xfffaf000, size 0xf84 fully unreadable
[1121/032145:ERROR:process_info.cc(608)] range at 0xfffac000, size 0xf84 fully unreadable
[1121/032145:ERROR:process_info.cc(608)] range at 0xfffa9000, size 0xf84 fully unreadable
[1121/032145:ERROR:process_info.cc(608)] range at 0xfffa6000, size 0xf84 fully unreadable
[1121/032145:ERROR:process_info.cc(608)] range at 0xfffa3000, size 0xf84 fully unreadable
[1121/032145:ERROR:process_info.cc(608)] range at 0xfffa0000, size 0xf84 fully unreadable
[1121/032145:ERROR:process_info.cc(608)] range at 0xfff9d000, size 0xf84 fully unreadable
[1121/032145:ERROR:process_info.cc(608)] range at 0xfff9a000, size 0xf84 fully unreadable
[1121/032145:ERROR:process_info.cc(608)] range at 0xfff97000, size 0xf84 fully unreadable
[1121/032145:ERROR:process_info.cc(608)] range at 0xfff94000, size 0xf84 fully unreadable
[1121/032145:ERROR:process_info.cc(608)] range at 0xfff91000, size 0xf84 fully unreadable
[1121/032145:ERROR:process_info.cc(608)] range at 0xfff8e000, size 0xf84 fully unreadable
[1121/032145:ERROR:process_info.cc(608)] range at 0xfff8b000, size 0xf84 fully unreadable
[1121/032145:ERROR:process_info.cc(608)] range at 0xfff88000, size 0xf84 fully unreadable
[1121/032145:ERROR:process_info.cc(608)] range at 0xfff85000, size 0xf84 fully unreadable
[1121/032145:ERROR:process_info.cc(608)] range at 0xfff82000, size 0xf84 fully unreadable
(INFO) 2016-11-21 03:21:47,141 desktop_browser_backend._GetAllCrashpadMinidumps:361  Found crashpad_database_util
(INFO) 2016-11-21 03:21:47,188 desktop_browser_backend.GetStackTrace:530  Minidump found: c:\b\swarm_slave\w\itirehln\tmpwunafo\reports\8c4981df-e4ef-45e1-b6ea-bccaa332a5e1.dmp
(INFO) 2016-11-21 03:21:47,188 cloud_storage.Insert:310  Uploading c:\b\swarm_slave\w\itirehln\tmpwunafo\reports\8c4981df-e4ef-45e1-b6ea-bccaa332a5e1.dmp to gs://chrome-telemetry-output/minidump-2016-11-21_03-21-47-900999.dmp
(INFO) 2016-11-21 03:21:56,499 desktop_browser_backend._GetAllCrashpadMinidumps:361  Found crashpad_database_util
Can't get standard output with --show-stdout

Traceback (most recent call last):
  _RunGpuTest at content\test\gpu\gpu_tests\gpu_integration_test.py:78
    self.RunActualGpuTest(url, *args)
  RunActualGpuTest at content\test\gpu\gpu_tests\webgl_conformance_integration_test.py:196
    getattr(self, test_name)(test_path, *args[1:])
  _RunConformanceTest at content\test\gpu\gpu_tests\webgl_conformance_integration_test.py:210
    self._CheckTestCompletion()
  _CheckTestCompletion at content\test\gpu\gpu_tests\webgl_conformance_integration_test.py:204
    'webglTestHarness._finished', timeout_in_seconds=300)
  traced_function at third_party\catapult\common\py_trace_event\py_trace_event\trace_event_impl\decorators.py:52
    return func(*args, **kwargs)
  WaitForJavaScriptCondition at third_party\catapult\telemetry\telemetry\internal\actions\action_runner.py:240
    self._tab.WaitForJavaScriptExpression(condition, timeout_in_seconds)
  traced_function at third_party\catapult\common\py_trace_event\py_trace_event\trace_event_impl\decorators.py:52
    return func(*args, **kwargs)
  WaitForJavaScriptExpression at third_party\catapult\telemetry\telemetry\internal\browser\web_contents.py:129
    py_utils.WaitFor(IsJavaScriptExpressionTrue, timeout)
  WaitFor at third_party\catapult\common\py_utils\py_utils\__init__.py:120
    res = condition()
  IsJavaScriptExpressionTrue at third_party\catapult\telemetry\telemetry\internal\browser\web_contents.py:122
    return bool(self.EvaluateJavaScript(expr))
  traced_function at third_party\catapult\common\py_trace_event\py_trace_event\trace_event_impl\decorators.py:52
    return func(*args, **kwargs)
  EvaluateJavaScript at third_party\catapult\telemetry\telemetry\internal\browser\web_contents.py:193
    expr, context_id=None, timeout=timeout)
  traced_function at third_party\catapult\common\py_trace_event\py_trace_event\trace_event_impl\decorators.py:52
    return func(*args, **kwargs)
  EvaluateJavaScriptInContext at third_party\catapult\telemetry\telemetry\internal\browser\web_contents.py:221
    expr, context_id=context_id, timeout=timeout)
  traced_function at third_party\catapult\common\py_trace_event\py_trace_event\trace_event_impl\decorators.py:52
    return func(*args, **kwargs)
  inner at third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_backend.py:36
    return func(inspector_backend, *args, **kwargs)
  EvaluateJavaScript at third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_backend.py:211
    return self._runtime.Evaluate(expr, context_id, timeout)
  Evaluate at third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_runtime.py:45
    res = self._inspector_websocket.SyncRequest(request, timeout)
  SyncRequest at third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_websocket.py:110
    res = self._Receive(timeout)
  _Receive at third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_websocket.py:166
    self._HandleNotification(result)
  _HandleNotification at third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_websocket.py:179
    self._domain_handlers[domain_name](result)
  traced_function at third_party\catapult\common\py_trace_event\py_trace_event\trace_event_impl\decorators.py:52
    return func(*args, **kwargs)
  _HandleInspectorDomainNotification at third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_backend.py:365
    raise exception
DevtoolsTargetCrashException: Devtools target crashed
********************************************************************************
(c:\b\swarm_slave\w\irk8oao4\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_backend.py:418 _AddDebuggingInformation) Received a socket error in the browser connection and the tab no longer exists. The tab probably crashed.
********************************************************************************
(c:\b\swarm_slave\w\irk8oao4\third_party\catapult\telemetry\telemetry\internal\backends\chrome_inspector\inspector_backend.py:419 _AddDebuggingInformation) Debugger url: ws://127.0.0.1:55837/devtools/page/6dcbbf33-c3ed-4732-8db7-35d09fc3dfe5
Found Minidump: True
Stack Trace:
********************************************************************************
	Last event: e48.5d4: Access violation - code c0000005 (first/second chance not available)
	  debugger time: Mon Nov 21 03:21:51.204 2016 (UTC - 8:00)
	ChildEBP RetAddr  Args to Child              
	WARNING: Frame IP not in any known module. Following frames may be wrong.
	069ef9b8 6216d3ed 6216cf0c 62174c60 61412993 0x0
	069ef9bc 6216cf0c 62174c60 61412993 6141f009 chrome_child!v8::base::OS::Abort+0xd
	069efac0 61412993 63950dd8 0000044f 638d0b94 chrome_child!V8_Fatal+0x7c
	069efad8 6108667f 29500000 26c8f8ec 00f94abb chrome_child!v8::internal::MemoryChunk::AllocateOldToNewSlots+0x23
	069efaec 6141f009 29500000 29504178 63cc3aec chrome_child!v8::internal::RememberedSet<1>::Insert+0x3f
	069efb14 6141f055 00000002 00000000 63cc3aec chrome_child!v8::internal::StoreBuffer::MoveEntriesToRememberedSet+0x209
	069efb24 61915805 05093610 057925f0 00000000 chrome_child!v8::internal::StoreBuffer::Task::RunInternal+0x25
	069efb9c 779b672f 051567b0 709761f5 05097d50 chrome_child!base::WorkerPool::RunsTasksOnCurrentThread+0x1c5
	069efc10 779a2d89 051567b0 057925f0 70976095 ntdll!TpAllocWork+0x31f
	*** WARNING: Unable to verify checksum for kernel32.dll
	*** ERROR: Symbol file could not be found.  Defaulted to export symbols for kernel32.dll - 
	069efd70 769a337a 05097d48 069efdbc 779892b2 ntdll!TpCallbackIndependent+0x7dc
	069efd7c 779892b2 05097d48 70976059 00000000 kernel32!BaseThreadInitThunk+0x12
	069efdbc 77989285 779a27e5 05097d48 ffffffff ntdll!RtlInitializeExceptionChain+0x63
	069efdd4 00000000 779a27e5 05097d48 00000000 ntdll!RtlInitializeExceptionChain+0x36
	
	   0  Id: e48.c54 Suspend: 0 Teb: fffdd000 Unfrozen
	ChildEBP RetAddr  Args to Child              
	WARNING: Stack unwind information not available. Following frames may be wrong.
	0056d7d0 77989d12 00000000 00000000 00f6ba38 ntdll!ZwWaitForSingleObject+0x15
	0056d7f8 6217389a 00f18d70 00f6ba38 6141edbc ntdll!RtlEncodePointer+0xfb
	0056d804 6141edbc 00000000 00f6ba38 613d52c0 chrome_child!v8::base::Mutex::Lock+0xa
	0056d810 613d52c0 00000000 0579f978 00000000 chrome_child!v8::internal::StoreBuffer::MoveAllEntriesToRememberedSet+0xc
	0056d824 613cc6ac 00f6ba28 00000000 00f6ba38 chrome_child!v8::internal::Heap::GarbageCollectionPrologue+0x130
	0056d894 6139e09a 00000000 00000001 00000000 chrome_child!v8::internal::Heap::CollectGarbage+0x1bc
	0056d8c4 6159e5d9 0056d900 00000090 00000000 chrome_child!v8::internal::Factory::NewFillerObject+0x9a
	0056d8f0 61599d17 00000001 0056d938 00f6ba28 chrome_child!v8::internal::Runtime_UnwindAndFindExceptionHandler+0x2619
	0056d9fc 76f5efa9 ffffffff 0056da30 00000000 chrome_child!v8::internal::Runtime_AllocateInNewSpace+0xd7
	0056da20 76f5f01a ffffffff 50338000 00000002 KERNELBASE!VirtualAllocEx+0x44
	0056da40 60ebec8c 00ea0000 00000000 00000010 KERNELBASE!VirtualAlloc+0x18
	0056da54 60ebebb6 00000010 0056da78 60ebeaa5 chrome_child!base::allocator::WinHeapMalloc+0x1d
	0056da60 60ebeaa5 64b1306c 00000010 0512d170 chrome_child!realloc+0x70
	0056da88 61dd3c8c 34880000 051214ec 040fed88 chrome_child!ShimMalloc+0x11
	0056da9c 6217399f 040fed88 040fed88 613db671 chrome_child!std::_Hash<std::_Uset_traits<cc::BeginFrameObserver *,std::_Uhash_compare<cc::BeginFrameObserver *,std::hash<cc::BeginFrameObserver *>,std::equal_to<cc::BeginFrameObserver *> >,std::allocator<cc::BeginFrameObserver *>,0> >::_Insert<cc::BeginFrameObserver * &,std::_List_unchecked_const_iterator<std::_List_val<std::_List_simple_types<cc::BeginFrameObserver *> >,std::_Iterator_base0> >+0x10c
	0056daa8 613db671 0000e000 00f6ba28 00f6ba28 chrome_child!v8::base::Mutex::Unlock+0xf
	0056dac4 613db6cc 00f6ba38 0000e000 00000000 chrome_child!v8::internal::ArrayBufferTracker::RegisterNew+0xf1
	0056dad4 0001c000 00000000 0001c000 1e2841a1 chrome_child!v8::internal::Heap::RegisterNewArrayBuffer+0xc
	00000000 00000000 00000000 00000000 00000000 0x1c000
	
	   1  Id: e48.66c Suspend: 0 Teb: fffda000 Unfrozen
	ChildEBP RetAddr  Args to Child              
	WARNING: Stack unwind information not available. Following frames may be wrong.
	03e8f768 619321a5 000001a4 03e8f860 03e8f78c ntdll!NtRemoveIoCompletion+0x15
	03e8f790 61932a43 ffffffff 00000000 040619a0 chrome_child!base::MessagePumpForIO::GetIOItem+0x35
	03e8f870 61931f40 00000000 00f3e628 00000000 chrome_child!base::MessagePumpForIO::WaitForWork+0xa3
	03e8f950 6193280a 00000000 00f46fb8 00f46fb8 chrome_child!base::MessagePumpForIO::DoRunLoop+0xb0
	03e8f978 618f7a71 00f46fb8 03e8fd50 00000000 chrome_child!base::MessagePumpWin::Run+0x4a
	03e8fba4 61905da9 0056f348 01acbd45 00000000 chrome_child!base::MessageLoop::RunHandler+0x131
	03e8fbcc 618f0afd 00000000 0000001f 00f3c5f8 chrome_child!base::RunLoop::Run+0x29
	03e8fc88 618f13ce 03e8fd50 00f25598 769a1430 chrome_child!base::Thread::Run+0xad
	03e8fd90 618d5082 00000000 00000000 00f25598 chrome_child!base::Thread::ThreadMain+0x26e
	03e8fdac 769a337a 000001a0 03e8fdf8 779892b2 chrome_child!base::PlatformThread::Sleep+0x122
	03e8fdb8 779892b2 00f25598 75e1601d 00000000 kernel32!BaseThreadInitThunk+0x12
	03e8fdf8 77989285 618d4ff0 00f25598 ffffffff ntdll!RtlInitializeExceptionChain+0x63
	03e8fe10 00000000 618d4ff0 00f25598 00000000 ntdll!RtlInitializeExceptionChain+0x36
	
	   2  Id: e48.fec Suspend: 0 Teb: fffd7000 Unfrozen
	ChildEBP RetAddr  Args to Child              
	WARNING: Stack unwind information not available. Following frames may be wrong.
	03cff938 769a337a 00000000 03cff984 779892b2 ntdll!ZwWaitForMultipleObjects+0x15
	03cff944 779892b2 00f4bb80 75c66461 00000000 kernel32!BaseThreadInitThunk+0x12
	03cff984 77989285 779913b5 00f4bb80 ffffffff ntdll!RtlInitializeExceptionChain+0x63
	03cff99c 00000000 779913b5 00f4bb80 00000000 ntdll!RtlInitializeExceptionChain+0x36
	
	   3  Id: e48.d4c Suspend: 0 Teb: fffaf000 Unfrozen
	ChildEBP RetAddr  Args to Child              
	WARNING: Stack unwind information not available. Following frames may be wrong.
	0424f8a4 769a337a 00f580e0 0424f8f0 779892b2 ntdll!NtWaitForWorkViaWorkerFactory+0x12
	0424f8b0 779892b2 00f580e0 722d6515 00000000 kernel32!BaseThreadInitThunk+0x12
	0424f8f0 77989285 779a27e5 00f580e0 ffffffff ntdll!RtlInitializeExceptionChain+0x63
	0424f908 00000000 779a27e5 00f580e0 00000000 ntdll!RtlInitializeExceptionChain+0x36
	
	   4  Id: e48.e38 Suspend: 0 Teb: fffac000 Unfrozen
	ChildEBP RetAddr  Args to Child              
	WARNING: Stack unwind information not available. Following frames may be wrong.
	0434f1ec 769a1194 00000234 00000010 00000000 ntdll!ZwWaitForSingleObject+0x15
	0434f204 769a1148 00000234 00000010 00000000 kernel32!WaitForSingleObjectEx+0x43
	0434f218 618f0403 00000234 00000010 00f6abe8 kernel32!WaitForSingleObject+0x12
	0434f2f8 61932d83 00000000 00000000 0405eaa8 chrome_child!base::WaitableEvent::TimedWait+0xd3
	0434f3e4 618f7a71 0405eaa8 0434f7bc 00000000 chrome_child!base::MessagePumpDefault::Run+0x153
	0434f610 61905da9 00f2a9d4 01acc099 00000000 chrome_child!base::MessageLoop::RunHandler+0x131
	0434f638 618f0afd 00000000 00000040 00000040 chrome_child!base::RunLoop::Run+0x29
	0434f6f4 618f13ce 0434f7bc 00f99938 769a1430 chrome_child!base::Thread::Run+0xad
	0434f7fc 618d5082 00000000 00000000 00f99938 chrome_child!base::Thread::ThreadMain+0x26e
	0434f818 769a337a 00000230 0434f864 779892b2 chrome_child!base::PlatformThread::Sleep+0x122
	0434f824 779892b2 00f99938 723d6581 00000000 kernel32!BaseThreadInitThunk+0x12
	0434f864 77989285 618d4ff0 00f99938 ffffffff ntdll!RtlInitializeExceptionChain+0x63
	0434f87c 00000000 618d4ff0 00f99938 00000000 ntdll!RtlInitializeExceptionChain+0x36
	
	   5  Id: e48.360 Suspend: 0 Teb: fffa9000 Unfrozen
	ChildEBP RetAddr  Args to Child              
	WARNING: Stack unwind information not available. Following frames may be wrong.
	046bf1c0 769a1194 00000254 ffffffff 00000000 ntdll!ZwWaitForSingleObject+0x15
	046bf1d8 769a1148 00000254 ffffffff 00000000 kernel32!WaitForSingleObjectEx+0x43
	046bf1ec 618f04aa 00000254 ffffffff 00f6ad28 kernel32!WaitForSingleObject+0x12
	046bf2c4 61932d01 00000000 04052b20 00000000 chrome_child!base::WaitableEvent::Wait+0x2a
	046bf3ac 618f7a71 04052b20 046bf784 00000000 chrome_child!base::MessagePumpDefault::Run+0xd1
	046bf5d8 61905da9 00f2a94c 01acc099 00000000 chrome_child!base::MessageLoop::RunHandler+0x131
	046bf600 618f0afd 00000000 00000040 00000040 chrome_child!base::RunLoop::Run+0x29
	046bf6bc 618f13ce 046bf784 00f9fc38 769a1430 chrome_child!base::Thread::Run+0xad
	046bf7c4 618d5082 00000000 00000000 00f9fc38 chrome_child!base::Thread::ThreadMain+0x26e
	046bf7e0 769a337a 00000250 046bf82c 779892b2 chrome_child!base::PlatformThread::Sleep+0x122
	046bf7ec 779892b2 00f9fc38 726265c9 00000000 kernel32!BaseThreadInitThunk+0x12
	046bf82c 77989285 618d4ff0 00f9fc38 ffffffff ntdll!RtlInitializeExceptionChain+0x63
	046bf844 00000000 618d4ff0 00f9fc38 00000000 ntdll!RtlInitializeExceptionChain+0x36
	
	   6  Id: e48.f44 Suspend: 0 Teb: fffa6000 Unfrozen
	ChildEBP RetAddr  Args to Child              
	WARNING: Stack unwind information not available. Following frames may be wrong.
	047cfa30 76a25138 618d4c09 047cfa74 047cfa74 ntdll!NtWaitForKeyedEvent+0x15
	047cfa68 6191b031 00f4be28 00f4bdd8 ffffffff kernel32!SleepConditionVariableSRW+0x24
	047cfb3c 6191b0cb 047cfb4c 00f4bdd4 fffffc18 chrome_child!base::ConditionVariable::TimedWait+0x31
	047cfb54 62e6260e 0405d2ac 0405d290 00f4bdd4 chrome_child!base::ConditionVariable::Wait+0x2b
	047cfb68 62e6262f 0405d2e4 00f4be28 618f54e0 chrome_child!content::CategorizedWorkerPool::Run+0x43
	047cfb74 618f54e0 0405c1c0 769a1430 38303933 chrome_child!content::CategorizedWorkerPool::Run+0x64
	047cfba0 618d5082 00000000 00000000 0405c1c0 chrome_child!base::SimpleThread::ThreadMain+0x70
	047cfbbc 769a337a 00000260 047cfc08 779892b2 chrome_child!base::PlatformThread::Sleep+0x122
	047cfbc8 779892b2 0405c1c0 727561ed 00000000 kernel32!BaseThreadInitThunk+0x12
	047cfc08 77989285 618d4ff0 0405c1c0 ffffffff ntdll!RtlInitializeExceptionChain+0x63
	047cfc20 00000000 618d4ff0 0405c1c0 00000000 ntdll!RtlInitializeExceptionChain+0x36
	
	   7  Id: e48.794 Suspend: 0 Teb: fffa3000 Unfrozen
	ChildEBP RetAddr  Args to Child              
	WARNING: Stack unwind information not available. Following frames may be wrong.
	048ffa90 76a25138 618d4c09 048ffad4 048ffad4 ntdll!NtWaitForKeyedEvent+0x15
	048ffac8 6191b031 00f4be28 00f4bdd8 ffffffff kernel32!SleepConditionVariableSRW+0x24
	048ffb9c 6191b0cb 048ffbac 00f4bdd4 fffffc18 chrome_child!base::ConditionVariable::TimedWait+0x31
	048ffbb4 62e6260e 00f5052c 00f50510 00f4bdd4 chrome_child!base::ConditionVariable::Wait+0x2b
	048ffbc8 62e6262f 00f50564 00f4be28 618f54e0 chrome_child!content::CategorizedWorkerPool::Run+0x43
	048ffbd4 618f54e0 0405c280 769a1430 30343931 chrome_child!content::CategorizedWorkerPool::Run+0x64
	048ffc00 618d5082 00000000 00000000 0405c280 chrome_child!base::SimpleThread::ThreadMain+0x70
	048ffc1c 769a337a 0000026c 048ffc68 779892b2 chrome_child!base::PlatformThread::Sleep+0x122
	048ffc28 779892b2 0405c280 7286618d 00000000 kernel32!BaseThreadInitThunk+0x12
	048ffc68 77989285 618d4ff0 0405c280 ffffffff ntdll!RtlInitializeExceptionChain+0x63
	048ffc80 00000000 618d4ff0 0405c280 00000000 ntdll!RtlInitializeExceptionChain+0x36
	
	   8  Id: e48.430 Suspend: 0 Teb: fffa0000 Unfrozen
	ChildEBP RetAddr  Args to Child              
	WARNING: Stack unwind information not available. Following frames may be wrong.
	04cdfc30 76a25138 04cdfc6c 0407dd70 76a25138 ntdll!NtWaitForKeyedEvent+0x15
	04cdfc60 6191b031 00f4be28 00f4bdd8 ffffffff kernel32!SleepConditionVariableSRW+0x24
	04cdfd34 6191b0cb 04cdfd44 00f4bdd4 fffffc18 chrome_child!base::ConditionVariable::TimedWait+0x31
	04cdfd4c 62e6260e 0407dd8c 0407dd70 00f4bdd4 chrome_child!base::ConditionVariable::Wait+0x2b
	04cdfd60 62e6262f 0407ddc4 00f4be28 618f54e0 chrome_child!content::CategorizedWorkerPool::Run+0x43
	04cdfd6c 618f54e0 0405c280 769a1430 32373031 chrome_child!content::CategorizedWorkerPool::Run+0x64
	04cdfd98 618d5082 00000000 00000000 0405c280 chrome_child!base::SimpleThread::ThreadMain+0x70
	04cdfdb4 769a337a 00000278 04cdfe00 779892b2 chrome_child!base::PlatformThread::Sleep+0x122
	04cdfdc0 779892b2 0405c280 72c463e5 00000000 kernel32!BaseThreadInitThunk+0x12
	04cdfe00 77989285 618d4ff0 0405c280 ffffffff ntdll!RtlInitializeExceptionChain+0x63
	04cdfe18 00000000 618d4ff0 0405c280 00000000 ntdll!RtlInitializeExceptionChain+0x36
	
	   9  Id: e48.cdc Suspend: 0 Teb: fff9d000 Unfrozen
	ChildEBP RetAddr  Args to Child              
	WARNING: Stack unwind information not available. Following frames may be wrong.
	04edfbf0 76a25138 04edfc30 04edfc30 00f50660 ntdll!NtWaitForKeyedEvent+0x15
	04edfc24 6191b031 00f4be28 00f4bdd8 ffffffff kernel32!SleepConditionVariableSRW+0x24
	04edfcf8 6191b0cb 04edfd08 00f4bdd4 fffffc18 chrome_child!base::ConditionVariable::TimedWait+0x31
	04edfd10 62e6260e 00f5067c 00f50660 00f4bdd4 chrome_child!base::ConditionVariable::Wait+0x2b
	04edfd24 62e6262f 00f506b4 00f4be28 618f54e0 chrome_child!content::CategorizedWorkerPool::Run+0x43
	04edfd30 618f54e0 0405c358 769a1430 32393233 chrome_child!content::CategorizedWorkerPool::Run+0x64
	04edfd5c 618d5082 00000000 00000000 0405c358 chrome_child!base::SimpleThread::ThreadMain+0x70
	04edfd78 769a337a 00000284 04edfdc4 779892b2 chrome_child!base::PlatformThread::Sleep+0x122
	04edfd84 779892b2 0405c358 72e46021 00000000 kernel32!BaseThreadInitThunk+0x12
	04edfdc4 77989285 618d4ff0 0405c358 ffffffff ntdll!RtlInitializeExceptionChain+0x63
	04edfddc 00000000 618d4ff0 0405c358 00000000 ntdll!RtlInitializeExceptionChain+0x36
	
	  10  Id: e48.f64 Suspend: 0 Teb: fff9a000 Unfrozen
	ChildEBP RetAddr  Args to Child              
	WARNING: Stack unwind information not available. Following frames may be wrong.
	0501f890 76a25138 00f5ab28 76a25138 00f4be34 ntdll!NtWaitForKeyedEvent+0x15
	0501f8bc 6191b031 00f4be34 00f4bdd8 ffffffff kernel32!SleepConditionVariableSRW+0x24
	0501f990 6191b0cb 0501f9a0 00f4bdd4 fffffc18 chrome_child!base::ConditionVariable::TimedWait+0x31
	0501f9a8 62e6260e 00f5ab44 00f5ab28 00f4bdd4 chrome_child!base::ConditionVariable::Wait+0x2b
	0501f9bc 62e6262f 00f5ab7c 00f4be34 618f54e0 chrome_child!content::CategorizedWorkerPool::Run+0x43
	0501f9c8 618f54e0 0405c280 769a1430 30343933 chrome_child!content::CategorizedWorkerPool::Run+0x64
	0501f9f4 618d5082 00000000 00000000 0405c280 chrome_child!base::SimpleThread::ThreadMain+0x70
	0501fa10 769a337a 00000290 0501fa5c 779892b2 chrome_child!base::PlatformThread::Sleep+0x122
	0501fa1c 779892b2 0405c280 730867b9 00000000 kernel32!BaseThreadInitThunk+0x12
	0501fa5c 77989285 618d4ff0 0405c280 ffffffff ntdll!RtlInitializeExceptionChain+0x63
	0501fa74 00000000 618d4ff0 0405c280 00000000 ntdll!RtlInitializeExceptionChain+0x36
	
	  11  Id: e48.a58 Suspend: 0 Teb: fff97000 Unfrozen
	ChildEBP RetAddr  Args to Child              
	WARNING: Stack unwind information not available. Following frames may be wrong.
	0554f890 769a1194 000002c8 ffffffff 00000000 ntdll!ZwWaitForSingleObject+0x15
	0554f8a8 769a1148 000002c8 ffffffff 00000000 kernel32!WaitForSingleObjectEx+0x43
	0554f8bc 618f04aa 000002c8 ffffffff 04060008 kernel32!WaitForSingleObject+0x12
	0554f994 61932d01 00000000 04077768 00000000 chrome_child!base::WaitableEvent::Wait+0x2a
	0554fa7c 618f7a71 04077768 0554fe54 00000000 chrome_child!base::MessagePumpDefault::Run+0xd1
	0554fca8 61905da9 04112394 01ace2b2 00000000 chrome_child!base::MessageLoop::RunHandler+0x131
	0554fcd0 618f0afd 00000000 0000001f 04052328 chrome_child!base::RunLoop::Run+0x29
	0554fd8c 618f13ce 0554fe54 04139ca8 769a1430 chrome_child!base::Thread::Run+0xad
	0554fe94 618d5082 00000000 00000000 04139ca8 chrome_child!base::Thread::ThreadMain+0x26e
	0554feb0 769a337a 000002c4 0554fefc 779892b2 chrome_child!base::PlatformThread::Sleep+0x122
	0554febc 779892b2 04139ca8 735d6319 00000000 kernel32!BaseThreadInitThunk+0x12
	0554fefc 77989285 618d4ff0 04139ca8 ffffffff ntdll!RtlInitializeExceptionChain+0x63
	0554ff14 00000000 618d4ff0 04139ca8 00000000 ntdll!RtlInitializeExceptionChain+0x36
	
	  12  Id: e48.a10 Suspend: 0 Teb: fff94000 Unfrozen
	ChildEBP RetAddr  Args to Child              
	WARNING: Stack unwind information not available. Following frames may be wrong.
	05cdfa3c 769a337a 05097d48 05cdfa88 779892b2 ntdll!NtWaitForWorkViaWorkerFactory+0x12
	05cdfa48 779892b2 05097d48 73c4676d 00000000 kernel32!BaseThreadInitThunk+0x12
	05cdfa88 77989285 779a27e5 05097d48 ffffffff ntdll!RtlInitializeExceptionChain+0x63
	05cdfaa0 00000000 779a27e5 05097d48 00000000 ntdll!RtlInitializeExceptionChain+0x36
	
	  13  Id: e48.f2c Suspend: 0 Teb: fff91000 Unfrozen
	ChildEBP RetAddr  Args to Child              
	WARNING: Stack unwind information not available. Following frames may be wrong.
	0565fe48 769a337a 05097d48 0565fe94 779892b2 ntdll!NtWaitForWorkViaWorkerFactory+0x12
	0565fe54 779892b2 05097d48 736c6371 00000000 kernel32!BaseThreadInitThunk+0x12
	0565fe94 77989285 779a27e5 05097d48 ffffffff ntdll!RtlInitializeExceptionChain+0x63
	0565feac 00000000 779a27e5 05097d48 00000000 ntdll!RtlInitializeExceptionChain+0x36
	
	# 14  Id: e48.5d4 Suspend: 0 Teb: fff8e000 Unfrozen
	ChildEBP RetAddr  Args to Child              
	WARNING: Stack unwind information not available. Following frames may be wrong.
	069ef138 76f644ab 0000ea60 00000000 069ef210 ntdll!NtDelayExecution+0x15
	*** WARNING: Unable to verify checksum for chrome_elf.dll
	069ef148 686391ef 0000ea60 069ef408 069ef408 KERNELBASE!Sleep+0xf
	069ef210 61917c62 069ef408 76a7030c 00000000 chrome_elf!crashpad::CrashpadClient::StartHandler+0xb41
	069ef31c 769e030b 069ef408 3453c990 779c3840 chrome_child!base::debug::StackTrace::OutputToStream+0x332
	069ef3a4 779c3821 069ef408 00000000 069ef408 kernel32!GetProfileStringW+0x12d6f
	069ef3bc 779c37b5 069ef408 069efc4c 00000000 ntdll!RtlWerpReportException+0x25b
	069ef3d0 779ebf27 069ef408 069efc4c 069efd4c ntdll!RtlWerpReportException+0x1ef
	069efd70 769a337a 05097d48 069efdbc 779892b2 ntdll!RtlUlonglongByteSwap+0x1e927
	069efd7c 779892b2 05097d48 70976059 00000000 kernel32!BaseThreadInitThunk+0x12
	069efdbc 77989285 779a27e5 05097d48 ffffffff ntdll!RtlInitializeExceptionChain+0x63
	069efdd4 00000000 779a27e5 05097d48 00000000 ntdll!RtlInitializeExceptionChain+0x36
	
	  15  Id: e48.c1c Suspend: 0 Teb: fff8b000 Unfrozen
	ChildEBP RetAddr  Args to Child              
	WARNING: Stack unwind information not available. Following frames may be wrong.
	06affcec 769a337a 05097d48 06affd38 779892b2 ntdll!NtWaitForWorkViaWorkerFactory+0x12
	06affcf8 779892b2 05097d48 70a660dd 00000000 kernel32!BaseThreadInitThunk+0x12
	06affd38 77989285 779a27e5 05097d48 ffffffff ntdll!RtlInitializeExceptionChain+0x63
	06affd50 00000000 779a27e5 05097d48 00000000 ntdll!RtlInitializeExceptionChain+0x36
	
	  16  Id: e48.d84 Suspend: 0 Teb: fff88000 Unfrozen
	ChildEBP RetAddr  Args to Child              
	WARNING: Stack unwind information not available. Following frames may be wrong.
	06c6fdd8 769a337a 05097d48 06c6fe24 779892b2 ntdll!NtWaitForWorkViaWorkerFactory+0x12
	06c6fde4 779892b2 05097d48 70cf63c1 00000000 kernel32!BaseThreadInitThunk+0x12
	06c6fe24 77989285 779a27e5 05097d48 ffffffff ntdll!RtlInitializeExceptionChain+0x63
	06c6fe3c 00000000 779a27e5 05097d48 00000000 ntdll!RtlInitializeExceptionChain+0x36
	
	  17  Id: e48.e6c Suspend: 0 Teb: fff85000 Unfrozen
	ChildEBP RetAddr  Args to Child              
	WARNING: Stack unwind information not available. Following frames may be wrong.
	06d8ff80 769a337a 05097d48 06d8ffcc 779892b2 ntdll!NtWaitForWorkViaWorkerFactory+0x12
	06d8ff8c 779892b2 05097d48 70d16229 00000000 kernel32!BaseThreadInitThunk+0x12
	06d8ffcc 77989285 779a27e5 05097d48 ffffffff ntdll!RtlInitializeExceptionChain+0x63
	06d8ffe4 00000000 779a27e5 05097d48 00000000 ntdll!RtlInitializeExceptionChain+0x36
	
	  18  Id: e48.d40 Suspend: 0 Teb: fff82000 Unfrozen
	ChildEBP RetAddr  Args to Child              
	WARNING: Stack unwind information not available. Following frames may be wrong.
	06f8fa40 769a337a 05097d48 06f8fa8c 779892b2 ntdll!NtWaitForWorkViaWorkerFactory+0x12
	06f8fa4c 779892b2 05097d48 70f16769 00000000 kernel32!BaseThreadInitThunk+0x12
	06f8fa8c 77989285 779a27e5 05097d48 ffffffff ntdll!RtlInitializeExceptionChain+0x63
	06f8faa4 00000000 779a27e5 05097d48 00000000 ntdll!RtlInitializeExceptionChain+0x36
********************************************************************************
Standard output:
********************************************************************************
********************************************************************************
System log:
(Not implemented)

Locals:
  exception : DevtoolsTargetCrashException('Devtools target crashed',)
  res       : {u'params': {}, u'method': u'Inspector.targetCrashed'}

(INFO) 2016-11-21 03:21:56,687 desktop_browser_backend._GetAllCrashpadMinidumps:361  Found crashpad_database_util
(ERROR) 2016-11-21 03:21:56,691 gpu_integration_test._SymbolizeUnsymbolizedMinidumps:148  No minidump paths to symbolize
(INFO) 2016-11-21 03:21:56,691 desktop_browser_backend._GetAllCrashpadMinidumps:361  Found crashpad_database_util
(WARNING) 2016-11-21 03:21:56,697 gpu_integration_test._RestartBrowser:56  Restarting browser due to unexpected test failure
[3736:1692:1121/032156:WARNING:url_request_context_getter.cc(43)] URLRequestContextGetter leaking due to no owning thread.
(INFO) 2016-11-21 03:21:56,903 desktop_browser_backend._TryCooperativeShutdown:584  Successfully shut down browser cooperatively
(WARNING) 2016-11-21 03:21:56,911 gpu_integration_test.StartBrowser:38  Starting browser, attempt 1 of 3
(INFO) 2016-11-21 03:21:56,913 desktop_browser_backend.GetBrowserStartupArgs:250  Requested remote debugging port: 0
(INFO) 2016-11-21 03:21:56,913 desktop_browser_backend.Start:291  Starting Chrome ['c:\\b\\swarm_slave\\w\\irk8oao4\\out\\Release\\chrome.exe', '--disable-gpu-watchdog', '--test-type=gpu', '--disable-domain-blocking-for-3d-apis', '--disable-gesture-requirement-for-media-playback', '--disable-gpu-process-crash-limit', '--enable-experimental-canvas-features', '--js-flags=--expose-gc', '--enable-es3-apis', '--enable-logging=stderr', '--enable-net-benchmarking', '--metrics-recording-only', '--no-default-browser-check', '--no-first-run', '--enable-gpu-benchmarking', '--disable-background-networking', '--proxy-server=socks://localhost:55835', '--ignore-certificate-errors', '--disable-component-extensions-with-background-pages', '--disable-default-apps', '--remote-debugging-port=0', '--enable-crash-reporter-for-testing', '--window-size=1280,1024', '--user-data-dir=c:\\b\\swarm_slave\\w\\itirehln\\tmp31bv3j', 'about:blank']
[1308:1700:1121/032156:ERROR:memory_mapped_file.cc(52)] Couldn't open c:\b\swarm_slave\w\irk8oao4\out\Release\chrome_200_percent.pak
[1308:1700:1121/032156:ERROR:data_pack.cc(79)] Failed to mmap datapack
(INFO) 2016-11-21 03:21:57,026 desktop_browser_backend.HasBrowserFinishedLaunching:237  Discovered ephemeral port 55964
(INFO) 2016-11-21 03:21:57,049 browser._LogBrowserInfo:113  OS: win win7
[1121/032157:ERROR:memory_mapped_file.cc(52)] Couldn't open c:\b\swarm_slave\w\irk8oao4\out\Release\chrome_200_percent.pak
[1121/032157:ERROR:data_pack.cc(79)] Failed to mmap datapack
[2544:3816:1121/032157:INFO:media_foundation_video_encode_accelerator_win.cc(307)] Windows versions earlier than 8 are not supported.
(INFO) 2016-11-21 03:21:57,088 browser._LogBrowserInfo:120  GPU device 0: VENDOR = 0x10de (Nvidia), DEVICE = 0x104a
(INFO) 2016-11-21 03:21:57,088 browser._LogBrowserInfo:120  GPU device 1: VENDOR = 0x102b, DEVICE = 0x534
(INFO) 2016-11-21 03:21:57,088 browser._LogBrowserInfo:122  GPU Attributes:
(INFO) 2016-11-21 03:21:57,088 browser._LogBrowserInfo:124    adapter_luid        : 0.0
(INFO) 2016-11-21 03:21:57,088 browser._LogBrowserInfo:124    amd_switchable      : False
(INFO) 2016-11-21 03:21:57,088 browser._LogBrowserInfo:124    basic_info_state    : 1
(INFO) 2016-11-21 03:21:57,088 browser._LogBrowserInfo:124    context_info_state  : 1
(INFO) 2016-11-21 03:21:57,088 browser._LogBrowserInfo:124    direct_rendering    : True
(INFO) 2016-11-21 03:21:57,088 browser._LogBrowserInfo:124    driver_date         : 8-11-2016
(INFO) 2016-11-21 03:21:57,089 browser._LogBrowserInfo:124    driver_vendor       : NVIDIA
(INFO) 2016-11-21 03:21:57,089 browser._LogBrowserInfo:124    driver_version      : 21.21.13.7254
(INFO) 2016-11-21 03:21:57,089 browser._LogBrowserInfo:124    dx_diagnostics_info_state: 0
(INFO) 2016-11-21 03:21:57,089 browser._LogBrowserInfo:124    encrypted_only      : False
(INFO) 2016-11-21 03:21:57,089 browser._LogBrowserInfo:124    gl_extensions       : GL_ANGLE_depth_texture GL_ANGLE_framebuffer_blit GL_ANGLE_framebuffer_multisample GL_ANGLE_instanced_arrays GL_ANGLE_lossy_etc_decode GL_ANGLE_pack_reverse_row_order GL_ANGLE_robust_client_memory GL_ANGLE_texture_compression_dxt3 GL_ANGLE_texture_compression_dxt5 GL_ANGLE_texture_usage GL_ANGLE_translated_shader_source GL_CHROMIUM_bind_generates_resource GL_CHROMIUM_bind_uniform_location GL_CHROMIUM_copy_compressed_texture GL_CHROMIUM_copy_texture GL_CHROMIUM_sync_query GL_EXT_blend_minmax GL_EXT_color_buffer_float GL_EXT_color_buffer_half_float GL_EXT_debug_marker GL_EXT_discard_framebuffer GL_EXT_disjoint_timer_query GL_EXT_draw_buffers GL_EXT_frag_depth GL_EXT_map_buffer_range GL_EXT_occlusion_query_boolean GL_EXT_read_format_bgra GL_EXT_robustness GL_EXT_sRGB GL_EXT_shader_texture_lod GL_EXT_texture_compression_dxt1 GL_EXT_texture_filter_anisotropic GL_EXT_texture_format_BGRA8888 GL_EXT_texture_norm16 GL_EXT_texture_rg GL_EXT_texture_storage GL_EXT_unpack_subimage GL_KHR_debug GL_NV_EGL_stream_consumer_external GL_NV_fence GL_NV_pack_subimage GL_NV_pixel_buffer_object GL_OES_EGL_image GL_OES_EGL_image_external GL_OES_EGL_image_external_essl3 GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth32 GL_OES_element_index_uint GL_OES_get_program_binary GL_OES_mapbuffer GL_OES_packed_depth_stencil GL_OES_rgb8_rgba8 GL_OES_standard_derivatives GL_OES_texture_float GL_OES_texture_float_linear GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_npot GL_OES_vertex_array_object 
(INFO) 2016-11-21 03:21:57,089 browser._LogBrowserInfo:124    gl_renderer         : ANGLE (NVIDIA GeForce GT 610 Direct3D11 vs_5_0 ps_5_0)
(INFO) 2016-11-21 03:21:57,089 browser._LogBrowserInfo:124    gl_reset_notification_strategy: 33362
(INFO) 2016-11-21 03:21:57,089 browser._LogBrowserInfo:124    gl_vendor           : Google Inc.
(INFO) 2016-11-21 03:21:57,089 browser._LogBrowserInfo:124    gl_version          : OpenGL ES 3.0 (ANGLE 2.1.0.5dc37d05b193)
(INFO) 2016-11-21 03:21:57,089 browser._LogBrowserInfo:124    gl_ws_extensions    : EGL_EXT_create_context_robustness EGL_ANGLE_d3d_share_handle_client_buffer EGL_ANGLE_d3d_texture_client_buffer EGL_ANGLE_surface_d3d_texture_2d_share_handle EGL_ANGLE_query_surface_pointer EGL_ANGLE_window_fixed_size EGL_ANGLE_keyed_mutex EGL_ANGLE_surface_orientation EGL_NV_post_sub_buffer EGL_KHR_create_context EGL_EXT_device_query EGL_KHR_image EGL_KHR_image_base EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_gl_renderbuffer_image EGL_KHR_get_all_proc_addresses EGL_KHR_stream EGL_KHR_stream_consumer_gltexture EGL_NV_stream_consumer_gltexture_yuv EGL_ANGLE_flexible_surface_compatibility EGL_ANGLE_create_context_webgl_compatibility EGL_CHROMIUM_create_context_bind_generates_resource 
(INFO) 2016-11-21 03:21:57,089 browser._LogBrowserInfo:124    gl_ws_vendor        : Google Inc. (adapter LUID: 0000000000007f80)
(INFO) 2016-11-21 03:21:57,089 browser._LogBrowserInfo:124    gl_ws_version       : 1.4 (ANGLE 2.1.0.5dc37d05b193)
(INFO) 2016-11-21 03:21:57,089 browser._LogBrowserInfo:124    in_process_gpu      : False
(INFO) 2016-11-21 03:21:57,089 browser._LogBrowserInfo:124    initialization_time : 0.04148
(INFO) 2016-11-21 03:21:57,091 browser._LogBrowserInfo:124    jpeg_decode_accelerator_supported: False
(INFO) 2016-11-21 03:21:57,091 browser._LogBrowserInfo:124    lenovo_dcute        : False
(INFO) 2016-11-21 03:21:57,091 browser._LogBrowserInfo:124    max_msaa_samples    : 8
(INFO) 2016-11-21 03:21:57,091 browser._LogBrowserInfo:124    max_resolution_height: 1088
(INFO) 2016-11-21 03:21:57,091 browser._LogBrowserInfo:124    max_resolution_width: 1920
(INFO) 2016-11-21 03:21:57,091 browser._LogBrowserInfo:124    min_resolution_height: 48
(INFO) 2016-11-21 03:21:57,091 browser._LogBrowserInfo:124    min_resolution_width: 48
(INFO) 2016-11-21 03:21:57,091 browser._LogBrowserInfo:124    optimus             : False
(INFO) 2016-11-21 03:21:57,091 browser._LogBrowserInfo:124    pixel_shader_version: 5.0
(INFO) 2016-11-21 03:21:57,091 browser._LogBrowserInfo:124    process_crash_count : 0
(INFO) 2016-11-21 03:21:57,091 browser._LogBrowserInfo:124    profile             : 3
(INFO) 2016-11-21 03:21:57,091 browser._LogBrowserInfo:124    sandboxed           : True
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:124    software_rendering  : False
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:124    vertex_shader_version: 5.0
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:124    video_decode_accelerator_flags: 0
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:126  Feature Status:
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:128    2d_canvas           : enabled
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:128    flash_3d            : enabled
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:128    flash_stage3d       : enabled
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:128    flash_stage3d_baseline: enabled
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:128    gpu_compositing     : enabled
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:128    multiple_raster_threads: enabled_on
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:128    native_gpu_memory_buffers: disabled_software
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:128    rasterization       : unavailable_software
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:128    video_decode        : enabled
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:128    video_encode        : enabled
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:128    vpx_decode          : unavailable_software
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:128    webgl               : enabled
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:128    webgl2              : enabled
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:130  Driver Bug Workarounds:
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:132    clear_uniforms_before_first_program_use
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:132    disable_direct_composition
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:132    disable_discard_framebuffer
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:132    disable_dxgi_zero_copy_video
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:132    disable_framebuffer_cmaa
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:132    exit_on_context_lost
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:132    force_cube_complete
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:132    scalarize_vec_and_mat_constructor_args
(INFO) 2016-11-21 03:21:57,092 browser._LogBrowserInfo:132    texsubimage_faster_than_teximage
ERROR

This was last modified in https://codereview.chromium.org/2390743005 "[heap] Concurrently free empty slot set buckets". Maybe also related to  issue 665688 .
 

Comment 1 by kbr@chromium.org, Nov 29 2016

Blocking: 665688
Cc: mlippautz@chromium.org
I wonder whether it's also possible that  Issue 666061  is affecting this. There is a bug in the management of the Oilpan GC'd WebGL objects that I am fixing under that bug ID and  Issue 537054 . I suspect not, since it looks like this is purely in V8's GC, but the two GCs are intertwined in ways I don't fully understand.

Comment 2 by hpayer@chromium.org, Nov 29 2016

It looks like a race between main thread directly adding to the remembered set and concurrent store buffer processing thread. Fix in flight.
Project Member

Comment 4 by bugdroid1@chromium.org, Nov 29 2016

The following revision refers to this bug:
  https://chromium.googlesource.com/v8/v8.git/+/810fcb2866d265266b24515ff2d9348425c63aef

commit 810fcb2866d265266b24515ff2d9348425c63aef
Author: machenbach <machenbach@chromium.org>
Date: Tue Nov 29 10:02:22 2016

Revert of [heap] Reland: Use store buffer for writes coming from mutator. (patchset #1 id:1 of https://codereview.chromium.org/2529293004/ )

Reason for revert:
Suspect for tsan failures:
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20TSAN/builds/12915

Original issue's description:
> [heap] Reland: Use store buffer for writes coming from mutator.
>
> This reverts commit 061c2ab23a1d4cd192b935e7912e7dfb1fed845d.
>
> BUG= chromium:648568 ,  chromium:669270 
>
> Committed: https://crrev.com/fa2fdf275197185d9bca9d5e72c16a60722c3893
> Cr-Commit-Position: refs/heads/master@{#41341}

TBR=mlippautz@chromium.org,hpayer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG= chromium:648568 ,  chromium:669270 

Review-Url: https://codereview.chromium.org/2534803004
Cr-Commit-Position: refs/heads/master@{#41342}

[modify] https://crrev.com/810fcb2866d265266b24515ff2d9348425c63aef/src/heap/heap-inl.h
[modify] https://crrev.com/810fcb2866d265266b24515ff2d9348425c63aef/src/heap/heap.cc
[modify] https://crrev.com/810fcb2866d265266b24515ff2d9348425c63aef/src/heap/store-buffer.cc
[modify] https://crrev.com/810fcb2866d265266b24515ff2d9348425c63aef/src/heap/store-buffer.h

Comment 6 by hpayer@chromium.org, Nov 29 2016

Status: Fixed (was: Assigned)
Should be fixed. Cannot reproduce locally. Please re-open if this crasher shows up again.
Project Member

Comment 7 by bugdroid1@chromium.org, Dec 8 2016

Labels: merge-merged-5.6
The following revision refers to this bug:
  https://chromium.googlesource.com/v8/v8.git/+/0830b15b734c87dbb7d407a0d4ba383bba4e2a31

commit 0830b15b734c87dbb7d407a0d4ba383bba4e2a31
Author: Hannes Payer <hpayer@chromium.org>
Date: Thu Dec 08 11:08:49 2016

Merged: [heap] Reland: Use store buffer for writes coming from mutator.

Revision: f3d119b9c5bb39ba994a6e437bfdacff9a6ff8fc

BUG= chromium:648568 , chromium:669270 ,chromium:668475
LOG=N
NOTRY=true
NOPRESUBMIT=true
NOTREECHECKS=true
R=hablich@chromium.org

Review URL: https://codereview.chromium.org/2562683002 .

Cr-Commit-Position: refs/branch-heads/5.6@{#47}
Cr-Branched-From: bdd3886218dfe76e8560eb8a18401942452ae859-refs/heads/5.6.326@{#1}
Cr-Branched-From: 879f6599eee6e1dfcbe9a24bf688b261c03e9558-refs/heads/master@{#41014}

[modify] https://crrev.com/0830b15b734c87dbb7d407a0d4ba383bba4e2a31/src/heap/heap-inl.h
[modify] https://crrev.com/0830b15b734c87dbb7d407a0d4ba383bba4e2a31/src/heap/heap.cc
[modify] https://crrev.com/0830b15b734c87dbb7d407a0d4ba383bba4e2a31/src/heap/store-buffer.cc
[modify] https://crrev.com/0830b15b734c87dbb7d407a0d4ba383bba4e2a31/src/heap/store-buffer.h
[modify] https://crrev.com/0830b15b734c87dbb7d407a0d4ba383bba4e2a31/src/objects-inl.h

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