Bug 151155 - CRASH under JSC::Debugger::setPauseOnNextStatement when debugging Web Inspector
Summary: CRASH under JSC::Debugger::setPauseOnNextStatement when debugging Web Inspector
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: JavaScriptCore (show other bugs)
Version: WebKit Nightly Build
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2015-11-11 14:15 PST by BJ Burg
Modified: 2017-01-18 23:39 PST (History)
6 users (show)

See Also:


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Description BJ Burg 2015-11-11 14:15:34 PST
SUMMARY:

 * Nondeterministic crashes when stepping through Web Inspector code in Web Inspector^2

STEPS TO REPRODUCE:

(N.B. it may reproduce on other simpler breakpoints, this is just where I hit it > once)

 * Open Web Inspector
 * Open Web Inspector^2
 * [^2] Set a breakpoint in DebuggerSidebarPanel.showDefaultContentView
 * Close and reopen Web Inspector^1
 * Should hit breakpoint
 * Wait 1 minute
 * Start single-stepping

EXPECTED:

 * No crashes

ACTUAL:

 * Occasional crashes in the debuggee process. Call stack:

CallFrameProxy#ECFZ1O:[0x11a53ae00->0x10c918e00, BaselineFunctionConstruct, 424 (FTLFail)]: we have result = CompilationSuccessful but we are our own replacement.
1   0x107796126 JSC::JITToDFGDeferredCompilationCallback::compilationDidComplete(JSC::CodeBlock*, JSC::CodeBlock*, JSC::CompilationResult)
2   0x107610ca4 JSC::DFG::Worklist::completeAllReadyPlansForVM(JSC::VM&, JSC::DFG::CompilationKey)
3   0x107610ede JSC::DFG::Worklist::completeAllPlansForVM(JSC::VM&)
4   0x1076123d8 JSC::DFG::completeAllPlansForVM(JSC::VM&)
5   0x107426a5d JSC::Debugger::setPauseOnNextStatement(bool)
6   0x10770534c non-virtual thunk to Inspector::InspectorDebuggerAgent::pause(WTF::String&)
7   0x1076e5a5d Inspector::DebuggerBackendDispatcher::pause(long, WTF::RefPtr<Inspector::InspectorObject>&&)
8   0x1076e414c Inspector::DebuggerBackendDispatcher::dispatch(long, WTF::String const&, WTF::Ref<Inspector::InspectorObject>&&)
9   0x1076d2aa3 Inspector::BackendDispatcher::dispatch(WTF::String const&)
10  0x106689084 void IPC::handleMessage<Messages::WebInspector::SendMessageToBackend, WebKit::WebInspector, void (WebKit::WebInspector::*)(WTF::String const&)>(IPC::MessageDecoder&, WebKit::WebInspector*, void (WebKit::WebInspector::*)(WTF::String const&))
11  0x106512957 IPC::Connection::dispatchMessage(std::__1::unique_ptr<IPC::MessageDecoder, std::__1::default_delete<IPC::MessageDecoder> >)
12  0x1065152b0 IPC::Connection::dispatchOneMessage()
13  0x107a78e75 WTF::RunLoop::performWork()
14  0x107a79222 WTF::RunLoop::performWork(void*)
15  0x7fff8eb295c1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__
16  0x7fff8eb1b41c __CFRunLoopDoSources0
17  0x7fff8eb1a93f __CFRunLoopRun
18  0x7fff8eb1a338 CFRunLoopRunSpecific
19  0x7fff99c6d935 RunCurrentEventLoopInMode
20  0x7fff99c6d76f ReceiveNextEventCommon
21  0x7fff99c6d5af _BlockUntilNextEventMatchingListInModeWithFilter
22  0x7fffa0ee11c6 _DPSNextEvent
23  0x7fffa12ada9f -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:]
24  0x1082cb9fa WebCore::EventLoop::cycle()
25  0x108a72568 WebCore::PageScriptDebugServer::runEventLoopWhilePaused()
26  0x1079d2941 Inspector::ScriptDebugServer::handlePause(JSC::JSGlobalObject*, JSC::Debugger::ReasonForPause)
27  0x107426c8d JSC::Debugger::pauseIfNeeded(JSC::ExecState*)
28  0x107427012 JSC::Debugger::atStatement(JSC::ExecState*)
29  0x1078b74d5 llint_slow_path_debug
30  0x1078c0e9b llint_entry
31  0x483cefc3380c
Comment 1 Radar WebKit Bug Importer 2015-11-11 14:16:08 PST
<rdar://problem/23506164>