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PORandom crashes in WaitNextEvent under 10.7.2
 

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  1. PORandom crashes in WaitNextEvent under 10.7.2
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    <p>Our (legacy) app runs stable on a range of OS versions (10.4 - 10.7) since years and now randomly crashes at ONE customers computers (both of them, though) within <code>WaitNextEvent</code>.</p> <p>All crashes occur deep inside Apple's code with random locations but always with <code>WaitNextEvent</code> somewhere in the call stack.</p> <p>Examples are:</p> <pre><code> Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 dyld 0x8fe8a33d _ZN4dyldL10loadPhase5EPKcS1_RKNS_11LoadContextEPSt6vectorIS1_SaIS1_EE + 716 1 dyld 0x8fe8a501 _ZN4dyldL10loadPhase4EPKcS1_RKNS_11LoadContextEPSt6vectorIS1_SaIS1_EE + 179 2 dyld 0x8fe8ae31 _ZN4dyldL10loadPhase3EPKcS1_RKNS_11LoadContextEPSt6vectorIS1_SaIS1_EE + 1429 3 dyld 0x8fe8b1f1 _ZN4dyldL10loadPhase1EPKcS1_RKNS_11LoadContextEPSt6vectorIS1_SaIS1_EE + 166 4 dyld 0x8fe8b340 _ZN4dyldL10loadPhase0EPKcS1_RKNS_11LoadContextEPSt6vectorIS1_SaIS1_EE + 240 5 dyld 0x8fe8b3fd dyld::load(char const*, dyld::LoadContext const&amp;) + 132 6 dyld 0x8fe8e036 dlopen + 428 7 libdyld.dylib 0x977b9a95 dlopen + 70 8 com.apple.CoreServices.CarbonCore 0x90d467cf GetDYLDEntryPointWithImage + 43 9 com.apple.CoreServices.CarbonCore 0x90d50aed GetDYLDEntryPoint + 45 10 com.apple.AppKit 0x9c62cf2c _IsCarbonFullScreenInstanceWorkspace + 57 11 com.apple.AppKit 0x9c03231c -[NSApplication _updateFullScreenPresentationOptions] + 75 12 com.apple.AppKit 0x9bdc97d5 -[NSApplication sendEvent:] + 906 13 com.apple.AppKit 0x9c4d81e1 _appActivationHandler + 547 14 com.apple.AppKit 0x9c4d79b8 carbonAppApplicationHandler + 108 15 com.apple.HIToolbox 0x9bb9f920 _InvokeEventHandlerUPP(OpaqueEventHandlerCallRef*, OpaqueEventRef*, void*, long (*)(OpaqueEventHandlerCallRef*, OpaqueEventRef*, void*)) + 36 16 com.apple.HIToolbox 0x9ba1b803 _ZL23DispatchEventToHandlersP14EventTargetRecP14OpaqueEventRefP14HandlerCallRec + 1602 17 com.apple.HIToolbox 0x9ba1ac80 _ZL30SendEventToEventTargetInternalP14OpaqueEventRefP20OpaqueEventTargetRefP14HandlerCallRec + 482 18 com.apple.HIToolbox 0x9ba1aa98 SendEventToEventTargetWithOptions + 75 19 com.apple.HIToolbox 0x9ba306fe _ZL29ToolboxEventDispatcherHandlerP25OpaqueEventHandlerCallRefP14OpaqueEventRefPv + 3152 20 com.apple.HIToolbox 0x9ba1bcbe _ZL23DispatchEventToHandlersP14EventTargetRecP14OpaqueEventRefP14HandlerCallRec + 2813 21 com.apple.HIToolbox 0x9ba1ac80 _ZL30SendEventToEventTargetInternalP14OpaqueEventRefP20OpaqueEventTargetRefP14HandlerCallRec + 482 22 com.apple.HIToolbox 0x9ba2faa9 SendEventToEventTarget + 76 23 com.apple.HIToolbox 0x9bb9f76c ToolboxEventDispatcher + 82 24 com.apple.HIToolbox 0x9bbb1e0f GetOrPeekEvent + 482 25 com.apple.HIToolbox 0x9bbb217f GetNextEventMatchingMask + 539 26 com.apple.HIToolbox 0x9bbb24b7 WNEInternal + 434 27 com.apple.HIToolbox 0x9bbb1784 WaitNextEvent + 53 28 com.ourStuff 0x000bebe5 LApplication::ProcessNextEvent() + 69 </code></pre> <p>or</p> <pre><code> Thread 0:: Dispatch queue: com.apple.main-thread 0 libsystem_kernel.dylib 0x9c2dec22 mach_msg_trap + 10 1 libsystem_kernel.dylib 0x9c2de1f6 mach_msg + 70 2 com.apple.CoreFoundation 0x98f370ea __CFRunLoopServiceMachPort + 170 3 com.apple.CoreFoundation 0x98f40214 __CFRunLoopRun + 1428 4 com.apple.CoreFoundation 0x98f3f8ec CFRunLoopRunSpecific + 332 5 com.apple.CoreFoundation 0x98f3f798 CFRunLoopRunInMode + 120 6 com.apple.HIToolbox 0x95b7fa7f RunCurrentEventLoopInMode + 318 7 com.apple.HIToolbox 0x95d1c151 GetNextEventMatchingMask + 493 8 com.apple.HIToolbox 0x95d1c4b7 WNEInternal + 434 9 com.apple.HIToolbox 0x95d1b784 WaitNextEvent + 53 10 com.apple.HIToolbox 0x95cfc136 ModalDialog + 1638 11 com.apple.HIToolbox 0x95d03ff5 RunStandardAlert + 741 12 com.apple.HIToolbox 0x95d028bf StandardAlert + 201 13 com.ourStuff 0x0007fbaa 0x1000 + 519082 </code></pre> <p><strong>Any</strong> hints are highly appreciated!</p> <p>As of now we couldn't reproduce the bug locally.</p>
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    1. USPeter Hosey
    1. USJay
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    1. COWow. Nice to see a fellow PowerPlanter here. :) I don't have any answer for you but I do remember some years ago one of my apps also randomly crashed inside WaitNextEvent. After days of hair-pulling, I finally pinned it down to an extra CFRelease to a CFStringRef somewhere else in my code. Some how it never crashed near the extra release but much later in the event loop.
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      1. PORandom crashes in WaitNextEvent under 10.7.2
      1. USStephen Chu
    2. COIt's a weird one! But the crashes are happening on one customer's system only - and he's got the DefaultFolderX hack installed, which shows up in every crash dump...
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      1. PORandom crashes in WaitNextEvent under 10.7.2
      1. USJay
 

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