Bug 172203 – Got a GC crash in wasm/function-tests/grow-memory.js test

• Status: NEW
• Component: JavaScriptCore

[Saam Barati]

Can't reproduce, but here is crashlog:


Process:               jsc [9947]
Path:                  /Users/USER/*/JavaScriptCore.framework/Versions/A/Resources/jsc
Identifier:            jsc
Version:               0
Code Type:             X86-64 (Native)
Parent Process:        ??? [9945]
Responsible:           jsc [9947]
User ID:               501

Date/Time:             2017-05-16 17:38:12.233 -0700
Report Version:        12
Time Awake Since Boot: 650000 seconds
Time Since Wake:       25000 seconds

System Integrity Protection: enabled

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Segmentation fault: 11
Termination Reason:    Namespace SIGNAL, Code 0xb
Terminating Process:   exc handler [0]

VM Regions Near 0:
--> 
    __TEXT                 000000010eb7e000-000000010ebef000 [  452K] r-x/rwx SM=COW  /Users/USER/*/JavaScriptCore.framework/Versions/A/Resources/jsc

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.apple.JavaScriptCore      	0x000000011158f2dd JSC::Heap::runFixpointPhase(JSC::GCConductor) + 701 (memory:2702)
1   com.apple.JavaScriptCore      	0x000000011158e41c JSC::Heap::runCurrentPhase(JSC::GCConductor, JSC::CurrentThreadState*) + 236 (Heap.cpp:1129)
2   com.apple.JavaScriptCore      	0x00000001115b261a JSC::Heap::collectInMutatorThread()::$_0::operator()(JSC::CurrentThreadState&) const + 42 (Heap.cpp:1745)
3   com.apple.JavaScriptCore      	0x00000001115b25ac WTF::ScopedLambdaFunctor<void (JSC::CurrentThreadState&), JSC::Heap::collectInMutatorThread()::$_0>::implFunction(void*, JSC::CurrentThreadState&) + 44 (ScopedLambda.h:104)
4   com.apple.JavaScriptCore      	0x000000011192e9b7 void WTF::ScopedLambda<void (JSC::CurrentThreadState&)>::operator()<JSC::CurrentThreadState&>(JSC::CurrentThreadState&&&) const + 55 (ScopedLambda.h:56)
5   com.apple.JavaScriptCore      	0x000000011192e951 JSC::callWithCurrentThreadState(WTF::ScopedLambda<void (JSC::CurrentThreadState&)> const&) + 129 (MachineStackMarker.cpp:433)
6   com.apple.JavaScriptCore      	0x0000000111592f1a JSC::Heap::collectInMutatorThread() + 186 (Heap.cpp:1757)
7   com.apple.JavaScriptCore      	0x0000000111592ce6 JSC::Heap::stopIfNecessarySlow(unsigned int) + 198 (Heap.cpp:1728)
8   com.apple.JavaScriptCore      	0x0000000111593f7b void JSC::Heap::waitForCollector<JSC::Heap::waitForCollection(unsigned long long)::$_20>(JSC::Heap::waitForCollection(unsigned long long)::$_20 const&) + 139 (Heap.cpp:1783)
9   com.apple.JavaScriptCore      	0x000000011158e15f JSC::Heap::waitForCollection(unsigned long long) + 47 (Heap.cpp:2047)
10  com.apple.JavaScriptCore      	0x000000011158db80 JSC::Heap::collectSync(JSC::GCRequest) + 80 (Heap.cpp:1058)
11  com.apple.JavaScriptCore      	0x000000011158dc1c JSC::Heap::collectNow(JSC::Synchronousness, JSC::GCRequest) + 140 (Heap.cpp:1010)
12  com.apple.JavaScriptCore      	0x0000000111cbe3fd JSC::Wasm::(anonymous namespace)::tryGetFastMemory(JSC::VM&) + 365 (WasmMemory.cpp:156)
13  com.apple.JavaScriptCore      	0x0000000111cbe096 JSC::Wasm::Memory::create(JSC::VM&, JSC::Wasm::PageCount, JSC::Wasm::PageCount) + 534 (WasmMemory.cpp:399)
14  com.apple.JavaScriptCore      	0x0000000111d26f46 JSC::constructJSWebAssemblyMemory(JSC::ExecState*) + 1942 (WebAssemblyMemoryConstructor.cpp:99)
15  com.apple.JavaScriptCore      	0x000000011170a23b JSC::handleHostCall(JSC::ExecState*, JSC::JSValue, JSC::CallLinkInfo*) + 1131 (JITOperations.cpp:897)
16  com.apple.JavaScriptCore      	0x000000011170994c operationLinkCall + 332 (JITOperations.cpp:932)
17  ???                           	0x000027841ca0173c 0 + 43448369420092
18  ???                           	0x000027841cac6382 0 + 43448370226050
19  com.apple.JavaScriptCore      	0x000000011192471e vmEntryToJavaScript + 334 (LowLevelInterpreter64.asm:256)
20  com.apple.JavaScriptCore      	0x00000001116f45be JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*) + 350 (JITCode.cpp:81)
21  com.apple.JavaScriptCore      	0x00000001116a65fb JSC::Interpreter::execute(JSC::ModuleProgramExecutable*, JSC::ExecState*, JSC::JSModuleEnvironment*) + 1243 (Interpreter.cpp:1272)
22  com.apple.JavaScriptCore      	0x00000001117fcccc JSC::JSModuleRecord::evaluate(JSC::ExecState*) + 140 (JSModuleRecord.cpp:208)
23  com.apple.JavaScriptCore      	0x00000001117f34be JSC::JSModuleLoader::evaluate(JSC::ExecState*, JSC::JSValue, JSC::JSValue, JSC::JSValue) + 286 (JSModuleLoader.cpp:238)
24  com.apple.JavaScriptCore      	0x0000000111959c91 JSC::moduleLoaderPrototypeEvaluate(JSC::ExecState*) + 209 (ModuleLoaderPrototype.cpp:245)
25  ???                           	0x000027841ca01028 0 + 43448369418280
26  com.apple.JavaScriptCore      	0x000000011192bde7 llint_entry + 29875 (LowLevelInterpreter.asm:761)
27  com.apple.JavaScriptCore      	0x000000011192be61 llint_entry + 29997 (LowLevelInterpreter.asm:761)
28  ???                           	0x000027841ca0c6a0 0 + 43448369464992
29  com.apple.JavaScriptCore      	0x000000011192471e vmEntryToJavaScript + 334 (LowLevelInterpreter64.asm:256)
30  com.apple.JavaScriptCore      	0x00000001116f45be JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*) + 350 (JITCode.cpp:81)
31  com.apple.JavaScriptCore      	0x00000001116a4e35 JSC::Interpreter::executeCall(JSC::ExecState*, JSC::JSObject*, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) + 1269 (Interpreter.cpp:954)
32  com.apple.JavaScriptCore      	0x0000000110e55988 JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) + 184 (CallData.cpp:39)
33  com.apple.JavaScriptCore      	0x0000000110e55c3a JSC::profiledCall(JSC::ExecState*, JSC::ProfilingReason, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) + 106 (CallData.cpp:59)
34  com.apple.JavaScriptCore      	0x00000001117e6e68 JSC::JSJobMicrotask::run(JSC::ExecState*) + 504 (JSJob.cpp:75)
35  com.apple.JavaScriptCore      	0x0000000111c4b0e3 JSC::QueuedTask::run() + 83 (VM.cpp:877)
36  com.apple.JavaScriptCore      	0x0000000111c4acf7 JSC::VM::drainMicrotasks() + 135 (VM.cpp:871)
37  jsc                           	0x000000010ebd43b0 runWithScripts(GlobalObject*, WTF::Vector<Script, 0ul, WTF::CrashOnOverflow, 16ul> const&, WTF::String const&, bool, bool, bool) + 2224 (jsc.cpp:3523)
38  jsc                           	0x000000010eb9314f jscmain(int, char**)::$_8::operator()(JSC::VM&, GlobalObject*) const + 95 (jsc.cpp:3900)
39  jsc                           	0x000000010eb84072 int runJSC<jscmain(int, char**)::$_8>(CommandLine, jscmain(int, char**)::$_8 const&) + 1394 (jsc.cpp:3810)
40  jsc                           	0x000000010eb82ce8 jscmain(int, char**) + 136 (jsc.cpp:3897)
41  jsc                           	0x000000010eb82c4e main + 46 (jsc.cpp:3365)
42  libdyld.dylib                 	0x00007fffa5638235 start + 1

Thread 1:
0   libsystem_kernel.dylib        	0x00007fffa5766f46 __semwait_signal + 10
1   libsystem_c.dylib             	0x00007fffa56edb72 nanosleep + 199
2   libc++.1.dylib                	0x00007fffa421265b std::__1::this_thread::sleep_for(std::__1::chrono::duration<long long, std::__1::ratio<1l, 1000000000l> > const&) + 80
3   com.apple.JavaScriptCore      	0x0000000111e65b20 void std::__1::this_thread::sleep_for<long long, std::__1::ratio<1l, 1000l> >(std::__1::chrono::duration<long long, std::__1::ratio<1l, 1000l> > const&) + 1776 (thread:443)
4   com.apple.JavaScriptCore      	0x0000000111e628d0 bmalloc::sleep(std::__1::unique_lock<bmalloc::StaticMutex>&, std::__1::chrono::duration<long long, std::__1::ratio<1l, 1000l> >) + 192 (StaticMutex.h:66)
5   com.apple.JavaScriptCore      	0x0000000111e627e5 bmalloc::Heap::scavenge(std::__1::unique_lock<bmalloc::StaticMutex>&, bmalloc::ScavengeMode) + 213 (Heap.cpp:179)
6   com.apple.JavaScriptCore      	0x0000000111e62130 bmalloc::Heap::concurrentScavenge() + 112 (Heap.cpp:164)
7   com.apple.JavaScriptCore      	0x0000000111e67428 bmalloc::AsyncTask<bmalloc::Heap, void (bmalloc::Heap::*)()>::threadRunLoop() + 1256 (AsyncTask.h:127)
8   com.apple.JavaScriptCore      	0x0000000111e663d6 bmalloc::AsyncTask<bmalloc::Heap, void (bmalloc::Heap::*)()>::threadEntryPoint(bmalloc::AsyncTask<bmalloc::Heap, void (bmalloc::Heap::*)()>*) + 38 (AsyncTask.h:111)
9   com.apple.JavaScriptCore      	0x0000000111e6844f void* std::__1::__thread_proxy<std::__1::tuple<void (*)(bmalloc::AsyncTask<bmalloc::Heap, void (bmalloc::Heap::*)()>*), bmalloc::AsyncTask<bmalloc::Heap, void (bmalloc::Heap::*)()>*> >(void*) + 415 (__functional_base:416)
10  libsystem_pthread.dylib       	0x00007fffa585193b _pthread_body + 180
11  libsystem_pthread.dylib       	0x00007fffa5851887 _pthread_start + 286
12  libsystem_pthread.dylib       	0x00007fffa585108d thread_start + 13

Thread 2:
0   libsystem_kernel.dylib        	0x00007fffa576744e __workq_kernreturn + 10
1   libsystem_pthread.dylib       	0x00007fffa585148e _pthread_wqthread + 1023
2   libsystem_pthread.dylib       	0x00007fffa585107d start_wqthread + 13

Thread 3:
0   libsystem_kernel.dylib        	0x00007fffa576744e __workq_kernreturn + 10
1   libsystem_pthread.dylib       	0x00007fffa585148e _pthread_wqthread + 1023
2   libsystem_pthread.dylib       	0x00007fffa585107d start_wqthread + 13

Thread 4:
0   libsystem_kernel.dylib        	0x00007fffa576744e __workq_kernreturn + 10
1   libsystem_pthread.dylib       	0x00007fffa5851621 _pthread_wqthread + 1426
2   libsystem_pthread.dylib       	0x00007fffa585107d start_wqthread + 13

Thread 5:: WTF::AutomaticThread
0   libsystem_kernel.dylib        	0x00007fffa5766bf2 __psynch_cvwait + 10
1   libsystem_pthread.dylib       	0x00007fffa58527fa _pthread_cond_wait + 712
2   com.apple.JavaScriptCore      	0x0000000111e4f9b3 WTF::ThreadCondition::timedWait(WTF::Mutex&, double) + 195 (ThreadingPthreads.cpp:524)
3   com.apple.JavaScriptCore      	0x0000000111e1679b WTF::ParkingLot::parkConditionallyImpl(void const*, WTF::ScopedLambda<bool ()> const&, WTF::ScopedLambda<void ()> const&, WTF::TimeWithDynamicClockType const&) + 411 (ParkingLot.cpp:604)
4   com.apple.JavaScriptCore      	0x0000000110cbf520 WTF::ParkingLot::ParkResult WTF::ParkingLot::parkConditionally<bool WTF::ConditionBase::waitUntil<WTF::Lock>(WTF::Lock&, WTF::TimeWithDynamicClockType const&)::'lambda'(), bool WTF::ConditionBase::waitUntil<WTF::Lock>(WTF::Lock&, WTF::TimeWithDynamicClockType const&)::'lambda0'()>(void const*, WTF::Lock const&, bool WTF::ConditionBase::waitUntil<WTF::Lock>(WTF::Lock&, WTF::TimeWithDynamicClockType const&)::'lambda0'() const&, WTF::TimeWithDynamicClockType const&) + 96 (ParkingLot.h:81)
5   com.apple.JavaScriptCore      	0x0000000110cbf42f bool WTF::ConditionBase::waitUntil<WTF::Lock>(WTF::Lock&, WTF::TimeWithDynamicClockType const&) + 143 (Condition.h:77)
6   com.apple.JavaScriptCore      	0x0000000111de0d79 bool WTF::ConditionBase::waitFor<WTF::Lock>(WTF::Lock&, WTF::Seconds) + 105 (Condition.h:117)
7   com.apple.JavaScriptCore      	0x0000000111de0bbe WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0::operator()() const + 478 (AutomaticThread.cpp:199)
8   com.apple.JavaScriptCore      	0x0000000111de09cd void std::__1::__invoke_void_return_wrapper<void>::__call<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0&>(WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0&&&) + 45 (__functional_base:469)
9   com.apple.JavaScriptCore      	0x0000000111de0769 std::__1::__function::__func<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0, std::__1::allocator<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0>, void ()>::operator()() + 41 (functional:1437)
10  com.apple.JavaScriptCore      	0x00000001112d815a std::__1::function<void ()>::operator()() const + 26 (functional:1817)
11  com.apple.JavaScriptCore      	0x0000000111e4c717 WTF::threadEntryPoint(void*) + 151 (Threading.cpp:99)
12  com.apple.JavaScriptCore      	0x0000000111e4e822 WTF::wtfThreadEntryPoint(void*) + 402 (ThreadingPthreads.cpp:203)
13  libsystem_pthread.dylib       	0x00007fffa585193b _pthread_body + 180
14  libsystem_pthread.dylib       	0x00007fffa5851887 _pthread_start + 286
15  libsystem_pthread.dylib       	0x00007fffa585108d thread_start + 13

Thread 6:: WTF::AutomaticThread
0   libsystem_kernel.dylib        	0x00007fffa575f43a swtch_pri + 10
1   libsystem_pthread.dylib       	0x00007fffa5852479 sched_yield + 11
2   com.apple.JavaScriptCore      	0x0000000111e0089f WTF::LockAlgorithm<unsigned char, (unsigned char)1, (unsigned char)2>::lockSlow(WTF::Atomic<unsigned char>&) + 159 (LockAlgorithm.h:145)
3   com.apple.JavaScriptCore      	0x0000000111e007f5 WTF::LockBase::lockSlow() + 21 (Lock.cpp:34)
4   com.apple.JavaScriptCore      	0x0000000110b01335 WTF::LockBase::lock() + 53 (Lock.h:59)
5   com.apple.JavaScriptCore      	0x0000000110cbf44a bool WTF::ConditionBase::waitUntil<WTF::Lock>(WTF::Lock&, WTF::TimeWithDynamicClockType const&) + 170 (Condition.h:89)
6   com.apple.JavaScriptCore      	0x0000000111b9dd49 bool WTF::ConditionBase::waitUntil<WTF::Lock, JSC::SlotVisitor::drainFromShared(JSC::SlotVisitor::SharedDrainMode, WTF::MonotonicTime)::$_8>(WTF::Lock&, WTF::TimeWithDynamicClockType const&, JSC::SlotVisitor::drainFromShared(JSC::SlotVisitor::SharedDrainMode, WTF::MonotonicTime)::$_8 const&) + 73 (Condition.h:99)
7   com.apple.JavaScriptCore      	0x0000000111b9dbf7 JSC::SlotVisitor::drainFromShared(JSC::SlotVisitor::SharedDrainMode, WTF::MonotonicTime) + 919 (SlotVisitor.cpp:636)
8   com.apple.JavaScriptCore      	0x00000001115aa2f8 JSC::Heap::runBeginPhase(JSC::GCConductor)::$_12::operator()() const + 1048 (Heap.cpp:1234)
9   com.apple.JavaScriptCore      	0x00000001115a9e39 WTF::SharedTaskFunctor<void (), JSC::Heap::runBeginPhase(JSC::GCConductor)::$_12>::run() + 25 (SharedTask.h:90)
10  com.apple.JavaScriptCore      	0x0000000111e1440d WTF::ParallelHelperClient::runTask(WTF::RefPtr<WTF::SharedTask<void ()> >) + 173 (ParallelHelperPool.cpp:115)
11  com.apple.JavaScriptCore      	0x0000000111e150ff WTF::ParallelHelperPool::Thread::work() + 63 (ParallelHelperPool.cpp:194)
12  com.apple.JavaScriptCore      	0x0000000111de0c27 WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0::operator()() const + 583 (AutomaticThread.cpp:215)
13  com.apple.JavaScriptCore      	0x0000000111de09cd void std::__1::__invoke_void_return_wrapper<void>::__call<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0&>(WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0&&&) + 45 (__functional_base:469)
14  com.apple.JavaScriptCore      	0x0000000111de0769 std::__1::__function::__func<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0, std::__1::allocator<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0>, void ()>::operator()() + 41 (functional:1437)
15  com.apple.JavaScriptCore      	0x00000001112d815a std::__1::function<void ()>::operator()() const + 26 (functional:1817)
16  com.apple.JavaScriptCore      	0x0000000111e4c717 WTF::threadEntryPoint(void*) + 151 (Threading.cpp:99)
17  com.apple.JavaScriptCore      	0x0000000111e4e822 WTF::wtfThreadEntryPoint(void*) + 402 (ThreadingPthreads.cpp:203)
18  libsystem_pthread.dylib       	0x00007fffa585193b _pthread_body + 180
19  libsystem_pthread.dylib       	0x00007fffa5851887 _pthread_start + 286
20  libsystem_pthread.dylib       	0x00007fffa585108d thread_start + 13

Thread 7:: WTF::AutomaticThread
0   libsystem_kernel.dylib        	0x00007fffa575f43a swtch_pri + 10
1   libsystem_pthread.dylib       	0x00007fffa5852479 sched_yield + 11
2   com.apple.JavaScriptCore      	0x0000000111e0089f WTF::LockAlgorithm<unsigned char, (unsigned char)1, (unsigned char)2>::lockSlow(WTF::Atomic<unsigned char>&) + 159 (LockAlgorithm.h:145)
3   com.apple.JavaScriptCore      	0x0000000111e007f5 WTF::LockBase::lockSlow() + 21 (Lock.cpp:34)
4   com.apple.JavaScriptCore      	0x0000000110b01335 WTF::LockBase::lock() + 53 (Lock.h:59)
5   com.apple.JavaScriptCore      	0x0000000110b05e7a WTF::Locker<WTF::LockBase>::lock() + 42 (Locker.h:111)
6   com.apple.JavaScriptCore      	0x0000000110cb7630 WTF::Locker<WTF::LockBase>::Locker(WTF::LockBase&) + 48 (Locker.h:53)
7   com.apple.JavaScriptCore      	0x0000000110cb75ed WTF::Locker<WTF::LockBase>::Locker(WTF::LockBase&) + 29 (Locker.h:53)
8   com.apple.JavaScriptCore      	0x0000000111de0a40 WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0::operator()() const + 96 (AutomaticThread.cpp:169)
9   com.apple.JavaScriptCore      	0x0000000111de09cd void std::__1::__invoke_void_return_wrapper<void>::__call<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0&>(WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0&&&) + 45 (__functional_base:469)
10  com.apple.JavaScriptCore      	0x0000000111de0769 std::__1::__function::__func<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0, std::__1::allocator<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0>, void ()>::operator()() + 41 (functional:1437)
11  com.apple.JavaScriptCore      	0x00000001112d815a std::__1::function<void ()>::operator()() const + 26 (functional:1817)
12  com.apple.JavaScriptCore      	0x0000000111e4c717 WTF::threadEntryPoint(void*) + 151 (Threading.cpp:99)
13  com.apple.JavaScriptCore      	0x0000000111e4e822 WTF::wtfThreadEntryPoint(void*) + 402 (ThreadingPthreads.cpp:203)
14  libsystem_pthread.dylib       	0x00007fffa585193b _pthread_body + 180
15  libsystem_pthread.dylib       	0x00007fffa5851887 _pthread_start + 286
16  libsystem_pthread.dylib       	0x00007fffa585108d thread_start + 13

Thread 8:: WTF::AutomaticThread
0   com.apple.JavaScriptCore      	0x0000000111e1afed WTF::(anonymous namespace)::ensureHashtable() + 29 (ParkingLot.cpp:267)
1   com.apple.JavaScriptCore      	0x0000000111e177a8 bool WTF::(anonymous namespace)::dequeue<WTF::ParkingLot::unparkCount(void const*, unsigned int)::$_7, WTF::ParkingLot::unparkCount(void const*, unsigned int)::$_8>(void const*, WTF::(anonymous namespace)::BucketMode, WTF::ParkingLot::unparkCount(void const*, unsigned int)::$_7 const&, WTF::ParkingLot::unparkCount(void const*, unsigned int)::$_8 const&) + 40 (ParkingLot.cpp:524)
2   com.apple.JavaScriptCore      	0x0000000111e17625 WTF::ParkingLot::unparkCount(void const*, unsigned int) + 101 (ParkingLot.cpp:757)
3   com.apple.JavaScriptCore      	0x0000000111e179da WTF::ParkingLot::unparkAll(void const*) + 26 (ParkingLot.cpp:794)
4   com.apple.JavaScriptCore      	0x0000000110cc0834 WTF::ConditionBase::notifyAll() + 68 (Condition.h:170)
5   com.apple.JavaScriptCore      	0x0000000111b9db53 JSC::SlotVisitor::drainFromShared(JSC::SlotVisitor::SharedDrainMode, WTF::MonotonicTime) + 755 (SlotVisitor.cpp:626)
6   com.apple.JavaScriptCore      	0x00000001115aa2f8 JSC::Heap::runBeginPhase(JSC::GCConductor)::$_12::operator()() const + 1048 (Heap.cpp:1234)
7   com.apple.JavaScriptCore      	0x00000001115a9e39 WTF::SharedTaskFunctor<void (), JSC::Heap::runBeginPhase(JSC::GCConductor)::$_12>::run() + 25 (SharedTask.h:90)
8   com.apple.JavaScriptCore      	0x0000000111e1440d WTF::ParallelHelperClient::runTask(WTF::RefPtr<WTF::SharedTask<void ()> >) + 173 (ParallelHelperPool.cpp:115)
9   com.apple.JavaScriptCore      	0x0000000111e150ff WTF::ParallelHelperPool::Thread::work() + 63 (ParallelHelperPool.cpp:194)
10  com.apple.JavaScriptCore      	0x0000000111de0c27 WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0::operator()() const + 583 (AutomaticThread.cpp:215)
11  com.apple.JavaScriptCore      	0x0000000111de09cd void std::__1::__invoke_void_return_wrapper<void>::__call<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0&>(WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0&&&) + 45 (__functional_base:469)
12  com.apple.JavaScriptCore      	0x0000000111de0769 std::__1::__function::__func<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0, std::__1::allocator<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0>, void ()>::operator()() + 41 (functional:1437)
13  com.apple.JavaScriptCore      	0x00000001112d815a std::__1::function<void ()>::operator()() const + 26 (functional:1817)
14  com.apple.JavaScriptCore      	0x0000000111e4c717 WTF::threadEntryPoint(void*) + 151 (Threading.cpp:99)
15  com.apple.JavaScriptCore      	0x0000000111e4e822 WTF::wtfThreadEntryPoint(void*) + 402 (ThreadingPthreads.cpp:203)
16  libsystem_pthread.dylib       	0x00007fffa585193b _pthread_body + 180
17  libsystem_pthread.dylib       	0x00007fffa5851887 _pthread_start + 286
18  libsystem_pthread.dylib       	0x00007fffa585108d thread_start + 13

Thread 9:: WTF::AutomaticThread
0   libsystem_kernel.dylib        	0x00007fffa5766bf2 __psynch_cvwait + 10
1   libsystem_pthread.dylib       	0x00007fffa58527fa _pthread_cond_wait + 712
2   com.apple.JavaScriptCore      	0x0000000111e4f8a0 WTF::ThreadCondition::wait(WTF::Mutex&) + 48 (ThreadingPthreads.cpp:503)
3   com.apple.JavaScriptCore      	0x0000000111e4f958 WTF::ThreadCondition::timedWait(WTF::Mutex&, double) + 104 (ThreadingPthreads.cpp:514)
4   com.apple.JavaScriptCore      	0x0000000111e1679b WTF::ParkingLot::parkConditionallyImpl(void const*, WTF::ScopedLambda<bool ()> const&, WTF::ScopedLambda<void ()> const&, WTF::TimeWithDynamicClockType const&) + 411 (ParkingLot.cpp:604)
5   com.apple.JavaScriptCore      	0x0000000110cbf520 WTF::ParkingLot::ParkResult WTF::ParkingLot::parkConditionally<bool WTF::ConditionBase::waitUntil<WTF::Lock>(WTF::Lock&, WTF::TimeWithDynamicClockType const&)::'lambda'(), bool WTF::ConditionBase::waitUntil<WTF::Lock>(WTF::Lock&, WTF::TimeWithDynamicClockType const&)::'lambda0'()>(void const*, WTF::Lock const&, bool WTF::ConditionBase::waitUntil<WTF::Lock>(WTF::Lock&, WTF::TimeWithDynamicClockType const&)::'lambda0'() const&, WTF::TimeWithDynamicClockType const&) + 96 (ParkingLot.h:81)
6   com.apple.JavaScriptCore      	0x0000000110cbf42f bool WTF::ConditionBase::waitUntil<WTF::Lock>(WTF::Lock&, WTF::TimeWithDynamicClockType const&) + 143 (Condition.h:77)
7   com.apple.JavaScriptCore      	0x0000000111b9dd49 bool WTF::ConditionBase::waitUntil<WTF::Lock, JSC::SlotVisitor::drainFromShared(JSC::SlotVisitor::SharedDrainMode, WTF::MonotonicTime)::$_8>(WTF::Lock&, WTF::TimeWithDynamicClockType const&, JSC::SlotVisitor::drainFromShared(JSC::SlotVisitor::SharedDrainMode, WTF::MonotonicTime)::$_8 const&) + 73 (Condition.h:99)
8   com.apple.JavaScriptCore      	0x0000000111b9dbf7 JSC::SlotVisitor::drainFromShared(JSC::SlotVisitor::SharedDrainMode, WTF::MonotonicTime) + 919 (SlotVisitor.cpp:636)
9   com.apple.JavaScriptCore      	0x00000001115aa2f8 JSC::Heap::runBeginPhase(JSC::GCConductor)::$_12::operator()() const + 1048 (Heap.cpp:1234)
10  com.apple.JavaScriptCore      	0x00000001115a9e39 WTF::SharedTaskFunctor<void (), JSC::Heap::runBeginPhase(JSC::GCConductor)::$_12>::run() + 25 (SharedTask.h:90)
11  com.apple.JavaScriptCore      	0x0000000111e1440d WTF::ParallelHelperClient::runTask(WTF::RefPtr<WTF::SharedTask<void ()> >) + 173 (ParallelHelperPool.cpp:115)
12  com.apple.JavaScriptCore      	0x0000000111e150ff WTF::ParallelHelperPool::Thread::work() + 63 (ParallelHelperPool.cpp:194)
13  com.apple.JavaScriptCore      	0x0000000111de0c27 WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0::operator()() const + 583 (AutomaticThread.cpp:215)
14  com.apple.JavaScriptCore      	0x0000000111de09cd void std::__1::__invoke_void_return_wrapper<void>::__call<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0&>(WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0&&&) + 45 (__functional_base:469)
15  com.apple.JavaScriptCore      	0x0000000111de0769 std::__1::__function::__func<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0, std::__1::allocator<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0>, void ()>::operator()() + 41 (functional:1437)
16  com.apple.JavaScriptCore      	0x00000001112d815a std::__1::function<void ()>::operator()() const + 26 (functional:1817)
17  com.apple.JavaScriptCore      	0x0000000111e4c717 WTF::threadEntryPoint(void*) + 151 (Threading.cpp:99)
18  com.apple.JavaScriptCore      	0x0000000111e4e822 WTF::wtfThreadEntryPoint(void*) + 402 (ThreadingPthreads.cpp:203)
19  libsystem_pthread.dylib       	0x00007fffa585193b _pthread_body + 180
20  libsystem_pthread.dylib       	0x00007fffa5851887 _pthread_start + 286
21  libsystem_pthread.dylib       	0x00007fffa585108d thread_start + 13

Thread 10:: WTF::AutomaticThread
0   libsystem_kernel.dylib        	0x00007fffa575f43a swtch_pri + 10
1   libsystem_pthread.dylib       	0x00007fffa5852479 sched_yield + 11
2   com.apple.JavaScriptCore      	0x0000000111e0089f WTF::LockAlgorithm<unsigned char, (unsigned char)1, (unsigned char)2>::lockSlow(WTF::Atomic<unsigned char>&) + 159 (LockAlgorithm.h:145)
3   com.apple.JavaScriptCore      	0x0000000111e007f5 WTF::LockBase::lockSlow() + 21 (Lock.cpp:34)
4   com.apple.JavaScriptCore      	0x0000000110b01335 WTF::LockBase::lock() + 53 (Lock.h:59)
5   com.apple.JavaScriptCore      	0x0000000110cbf44a bool WTF::ConditionBase::waitUntil<WTF::Lock>(WTF::Lock&, WTF::TimeWithDynamicClockType const&) + 170 (Condition.h:89)
6   com.apple.JavaScriptCore      	0x0000000111b9dd49 bool WTF::ConditionBase::waitUntil<WTF::Lock, JSC::SlotVisitor::drainFromShared(JSC::SlotVisitor::SharedDrainMode, WTF::MonotonicTime)::$_8>(WTF::Lock&, WTF::TimeWithDynamicClockType const&, JSC::SlotVisitor::drainFromShared(JSC::SlotVisitor::SharedDrainMode, WTF::MonotonicTime)::$_8 const&) + 73 (Condition.h:99)
7   com.apple.JavaScriptCore      	0x0000000111b9dbf7 JSC::SlotVisitor::drainFromShared(JSC::SlotVisitor::SharedDrainMode, WTF::MonotonicTime) + 919 (SlotVisitor.cpp:636)
8   com.apple.JavaScriptCore      	0x00000001115aa2f8 JSC::Heap::runBeginPhase(JSC::GCConductor)::$_12::operator()() const + 1048 (Heap.cpp:1234)
9   com.apple.JavaScriptCore      	0x00000001115a9e39 WTF::SharedTaskFunctor<void (), JSC::Heap::runBeginPhase(JSC::GCConductor)::$_12>::run() + 25 (SharedTask.h:90)
10  com.apple.JavaScriptCore      	0x0000000111e1440d WTF::ParallelHelperClient::runTask(WTF::RefPtr<WTF::SharedTask<void ()> >) + 173 (ParallelHelperPool.cpp:115)
11  com.apple.JavaScriptCore      	0x0000000111e150ff WTF::ParallelHelperPool::Thread::work() + 63 (ParallelHelperPool.cpp:194)
12  com.apple.JavaScriptCore      	0x0000000111de0c27 WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0::operator()() const + 583 (AutomaticThread.cpp:215)
13  com.apple.JavaScriptCore      	0x0000000111de09cd void std::__1::__invoke_void_return_wrapper<void>::__call<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0&>(WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0&&&) + 45 (__functional_base:469)
14  com.apple.JavaScriptCore      	0x0000000111de0769 std::__1::__function::__func<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0, std::__1::allocator<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0>, void ()>::operator()() + 41 (functional:1437)
15  com.apple.JavaScriptCore      	0x00000001112d815a std::__1::function<void ()>::operator()() const + 26 (functional:1817)
16  com.apple.JavaScriptCore      	0x0000000111e4c717 WTF::threadEntryPoint(void*) + 151 (Threading.cpp:99)
17  com.apple.JavaScriptCore      	0x0000000111e4e822 WTF::wtfThreadEntryPoint(void*) + 402 (ThreadingPthreads.cpp:203)
18  libsystem_pthread.dylib       	0x00007fffa585193b _pthread_body + 180
19  libsystem_pthread.dylib       	0x00007fffa5851887 _pthread_start + 286
20  libsystem_pthread.dylib       	0x00007fffa585108d thread_start + 13

Thread 11:: WTF::AutomaticThread
0   libsystem_kernel.dylib        	0x00007fffa575f43a swtch_pri + 10
1   libsystem_pthread.dylib       	0x00007fffa5852479 sched_yield + 11
2   com.apple.JavaScriptCore      	0x0000000111e0089f WTF::LockAlgorithm<unsigned char, (unsigned char)1, (unsigned char)2>::lockSlow(WTF::Atomic<unsigned char>&) + 159 (LockAlgorithm.h:145)
3   com.apple.JavaScriptCore      	0x0000000111e007f5 WTF::LockBase::lockSlow() + 21 (Lock.cpp:34)
4   com.apple.JavaScriptCore      	0x0000000110b01335 WTF::LockBase::lock() + 53 (Lock.h:59)
5   com.apple.JavaScriptCore      	0x0000000110b05e7a WTF::Locker<WTF::LockBase>::lock() + 42 (Locker.h:111)
6   com.apple.JavaScriptCore      	0x0000000110cb7630 WTF::Locker<WTF::LockBase>::Locker(WTF::LockBase&) + 48 (Locker.h:53)
7   com.apple.JavaScriptCore      	0x0000000110cb75ed WTF::Locker<WTF::LockBase>::Locker(WTF::LockBase&) + 29 (Locker.h:53)
8   com.apple.JavaScriptCore      	0x0000000111de0a40 WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0::operator()() const + 96 (AutomaticThread.cpp:169)
9   com.apple.JavaScriptCore      	0x0000000111de09cd void std::__1::__invoke_void_return_wrapper<void>::__call<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0&>(WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0&&&) + 45 (__functional_base:469)
10  com.apple.JavaScriptCore      	0x0000000111de0769 std::__1::__function::__func<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0, std::__1::allocator<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0>, void ()>::operator()() + 41 (functional:1437)
11  com.apple.JavaScriptCore      	0x00000001112d815a std::__1::function<void ()>::operator()() const + 26 (functional:1817)
12  com.apple.JavaScriptCore      	0x0000000111e4c717 WTF::threadEntryPoint(void*) + 151 (Threading.cpp:99)
13  com.apple.JavaScriptCore      	0x0000000111e4e822 WTF::wtfThreadEntryPoint(void*) + 402 (ThreadingPthreads.cpp:203)
14  libsystem_pthread.dylib       	0x00007fffa585193b _pthread_body + 180
15  libsystem_pthread.dylib       	0x00007fffa5851887 _pthread_start + 286
16  libsystem_pthread.dylib       	0x00007fffa585108d thread_start + 13

Thread 12:: WTF::AutomaticThread
0   libsystem_kernel.dylib        	0x00007fffa575f43a swtch_pri + 10
1   libsystem_pthread.dylib       	0x00007fffa5852479 sched_yield + 11
2   com.apple.JavaScriptCore      	0x0000000111e0089f WTF::LockAlgorithm<unsigned char, (unsigned char)1, (unsigned char)2>::lockSlow(WTF::Atomic<unsigned char>&) + 159 (LockAlgorithm.h:145)
3   com.apple.JavaScriptCore      	0x0000000111e007f5 WTF::LockBase::lockSlow() + 21 (Lock.cpp:34)
4   com.apple.JavaScriptCore      	0x0000000110b01335 WTF::LockBase::lock() + 53 (Lock.h:59)
5   com.apple.JavaScriptCore      	0x0000000110b05e7a WTF::Locker<WTF::LockBase>::lock() + 42 (Locker.h:111)
6   com.apple.JavaScriptCore      	0x0000000110cb7630 WTF::Locker<WTF::LockBase>::Locker(WTF::LockBase&) + 48 (Locker.h:53)
7   com.apple.JavaScriptCore      	0x0000000110cb75ed WTF::Locker<WTF::LockBase>::Locker(WTF::LockBase&) + 29 (Locker.h:53)
8   com.apple.JavaScriptCore      	0x0000000111b9d920 JSC::SlotVisitor::drainFromShared(JSC::SlotVisitor::SharedDrainMode, WTF::MonotonicTime) + 192 (SlotVisitor.cpp:587)
9   com.apple.JavaScriptCore      	0x00000001115aa2f8 JSC::Heap::runBeginPhase(JSC::GCConductor)::$_12::operator()() const + 1048 (Heap.cpp:1234)
10  com.apple.JavaScriptCore      	0x00000001115a9e39 WTF::SharedTaskFunctor<void (), JSC::Heap::runBeginPhase(JSC::GCConductor)::$_12>::run() + 25 (SharedTask.h:90)
11  com.apple.JavaScriptCore      	0x0000000111e1440d WTF::ParallelHelperClient::runTask(WTF::RefPtr<WTF::SharedTask<void ()> >) + 173 (ParallelHelperPool.cpp:115)
12  com.apple.JavaScriptCore      	0x0000000111e150ff WTF::ParallelHelperPool::Thread::work() + 63 (ParallelHelperPool.cpp:194)
13  com.apple.JavaScriptCore      	0x0000000111de0c27 WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0::operator()() const + 583 (AutomaticThread.cpp:215)
14  com.apple.JavaScriptCore      	0x0000000111de09cd void std::__1::__invoke_void_return_wrapper<void>::__call<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0&>(WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0&&&) + 45 (__functional_base:469)
15  com.apple.JavaScriptCore      	0x0000000111de0769 std::__1::__function::__func<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0, std::__1::allocator<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0>, void ()>::operator()() + 41 (functional:1437)
16  com.apple.JavaScriptCore      	0x00000001112d815a std::__1::function<void ()>::operator()() const + 26 (functional:1817)
17  com.apple.JavaScriptCore      	0x0000000111e4c717 WTF::threadEntryPoint(void*) + 151 (Threading.cpp:99)
18  com.apple.JavaScriptCore      	0x0000000111e4e822 WTF::wtfThreadEntryPoint(void*) + 402 (ThreadingPthreads.cpp:203)
19  libsystem_pthread.dylib       	0x00007fffa585193b _pthread_body + 180
20  libsystem_pthread.dylib       	0x00007fffa5851887 _pthread_start + 286
21  libsystem_pthread.dylib       	0x00007fffa585108d thread_start + 13

Thread 0 crashed with X86 Thread State (64-bit):
  rax: 0x0000000000000000  rbx: 0x00007fff510810e0  rcx: 0x0000000000000002  rdx: 0x0000000000000010
  rdi: 0x00000001100002a0  rsi: 0x00007fffffe00050  rbp: 0x00007fff5107edc0  rsp: 0x00007fff5107eb90
   r8: 0x000000000000026b   r9: 0x00007fff5107ea9f  r10: 0x0000000000000002  r11: 0xffffffff00000000
  r12: 0x0000000000000000  r13: 0x0000000110018008  r14: 0xffff000000000000  r15: 0xffff000000000002
  rip: 0x000000011158f2dd  rfl: 0x0000000000010287  cr2: 0x0000000000000000
  
Logical CPU:     0
Error Code:      0x00000004
Trap Number:     14


Binary Images:
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    0x7fffa585d000 -     0x7fffa585eff3  libsystem_secinit.dylib (24.50.4) <F78B847B-3565-3E4B-98A6-F7AD40392E2D> /usr/lib/system/libsystem_secinit.dylib
    0x7fffa585f000 -     0x7fffa5866ffb  libsystem_symptoms.dylib (532.50.47) <3390E07C-C1CE-348F-ADBD-2C5440B45EAA> /usr/lib/system/libsystem_symptoms.dylib
    0x7fffa5867000 -     0x7fffa587aff7  libsystem_trace.dylib (518.60.2) <6B145B10-5874-3E89-90CD-D370DB475BA1> /usr/lib/system/libsystem_trace.dylib
    0x7fffa587b000 -     0x7fffa5880ffb  libunwind.dylib (35.3) <3D50D8A8-C460-334D-A519-2DA841102C6B> /usr/lib/system/libunwind.dylib
    0x7fffa5881000 -     0x7fffa58aaff7  libxpc.dylib (972.60.2) <1C9AF716-69DF-359F-85E9-7DFDE362F9A2> /usr/lib/system/libxpc.dylib

External Modification Summary:
  Calls made by other processes targeting this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by all processes on this machine:
    task_for_pid: 651701
    thread_create: 0
    thread_set_state: 3942

VM Region Summary:
ReadOnly portion of Libraries: Total=255.8M resident=0K(0%) swapped_out_or_unallocated=255.8M(100%)
Writable regions: Total=1.2G written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=1.2G(100%)
 
                                  VIRTUAL   REGION 
REGION TYPE                          SIZE    COUNT (non-coalesced) 
===========                       =======  ======= 
Dispatch continuations              16.0M        2 
JS JIT generated code              256.0M        5 
JS JIT generated code (reserved)   768.0M        2         reserved VM address space (unallocated)
JS garbage collector                 4.0G        2 
JS garbage collector (reserved)     3200K        2         reserved VM address space (unallocated)
Kernel Alloc Once                      8K        2 
MALLOC                              48.2M       10 
MALLOC guard page                     16K        4 
STACK GUARD                           52K       14 
Stack                               70.1M       14 
WebKit Malloc                       22.1M       45 
__DATA                              9712K      140 
__LINKEDIT                         152.7M        5 
__TEXT                             103.1M      142 
__UNICODE                            556K        2 
shared memory                         20K        5 
===========                       =======  ======= 
TOTAL                                5.4G      380 
TOTAL, minus reserved VM space       4.7G      380