Hi all,
I've been battling with this intermittent crash for about two weeks
now and can't figure it out for the life of me. I've got try/catch
blocks around nearly all my code, and definitely around any code which
runs in a separate thread, but it's not catching whatever causes this
crash. Also, I'm not even convinced it's my threads causing the crash
as this one happened while a modal sheet was being displayed, before
any of my external threads got started.
I'm fairly sure it's not a leak or a double-free - I've tried running
with NSZombieEnabled, NSDebugEnabled, Malloc Guard, run the Clang
Static Analyser over it and it's not showing anything up.
If I set NSExceptionHandlingMask to 63 in the terminal before
launching my app, I get the following lines appearing in the console
when a crash would have happened, and the application keeps running.
The problem is, I can't seem to catch the exception anywhere.
NSExceptionHandler has recorded the following exception:
NSUncaughtSystemExceptionException -- Uncaught system exception:
signal 5
Stack trace: 0x94f340a9 0x95294e3b 0x94f33b11 0xc0f2a 0xc121e
0x911502bb 0xffffffff 0x932e2556 0x91115155 0x91115012
Here's the crash log I mentioned earlier. It's an intermittent crash
and I'm going crazy trying to debug it. Can anyone offer me any
insight at all please? Should I just burn an ADC support ticket and
be done with it?
Many thanks for any help or suggestions you can give me.
Mark
Version: 2.0 (200)
Code Type: PPC (Native)
Parent Process: launchd [65]
Date/Time: 2009-08-27 11:32:25.003 -0700
OS Version: Mac OS X 10.5.8 (9L30)
Report Version: 6
Anonymous UUID:
Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000001, 0x0000000090d5c02c
Crashed Thread: 6
Thread 0:
0 libSystem.B.dylib 0x95ece1f8 mach_msg_trap + 8
1 libSystem.B.dylib 0x95ed511c mach_msg + 56
2 com.apple.CoreFoundation 0x90d61394 CFRunLoopRunSpecific +
1812
3 com.apple.HIToolbox 0x938a3b14
RunCurrentEventLoopInMode + 264
4 com.apple.HIToolbox 0x938a3938 ReceiveNextEventCommon +
412
5 com.apple.HIToolbox 0x938ead04
IsUserStillTracking(MenuSelectData*, unsigned char*) + 472
6 com.apple.HIToolbox 0x938d47a0
TrackMenuCommon(MenuSelectData&, unsigned char*) + 3180
7 com.apple.HIToolbox 0x938cf854
MenuSelectCore(MenuData*, Point, double, unsigned long,
OpaqueMenuRef**, unsigned short*) + 228
8 com.apple.HIToolbox 0x938cf3bc _HandleMenuSelection2 +
388
9 com.apple.AppKit 0x93147c54 _NSHandleCarbonMenuEvent
+ 188
10 com.apple.AppKit 0x930bd728 _DPSNextEvent + 1848
11 com.apple.AppKit 0x930bcbfc -[NSApplication
nextEventMatchingMask:untilDate:inMode:dequeue:] + 112
12 com.apple.AppKit 0x930b689c -[NSApplication run] + 744
13 com.apple.AppKit 0x93087298 NSApplicationMain + 440
14 uk.co.markallan.myapp 0x000027f8 _start + 756
15 uk.co.markallan.myapp 0x000024fc start + 44
Thread 1:
0 libSystem.B.dylib 0x95ece278
semaphore_timedwait_signal_trap + 8
1 libSystem.B.dylib 0x95f11368 _pthread_cond_wait + 1320
2 com.apple.Foundation 0x9037f1a0 -[NSCondition
waitUntilDate:] + 384
3 com.apple.Foundation 0x9037efcc -[NSConditionLock
lockWhenCondition:beforeDate:] + 268
4 com.apple.AppKit 0x931189cc -[NSUIHeartBeat
_heartBeatThread:] + 664
5 com.apple.Foundation 0x90341d84 __NSThread__main__ + 1004
6 libSystem.B.dylib 0x95f100c4 _pthread_start + 316
Thread 2:
0 libSystem.B.dylib 0x95ece1f8 mach_msg_trap + 8
1 libSystem.B.dylib 0x95ed511c mach_msg + 56
2 com.apple.CoreFoundation 0x90d61394 CFRunLoopRunSpecific +
1812
3 com.apple.Foundation 0x90398d50 +
[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:] +
280
4 com.apple.Foundation 0x90341d84 __NSThread__main__ + 1004
5 libSystem.B.dylib 0x95f100c4 _pthread_start + 316
Thread 3:
0 libSystem.B.dylib 0x95ece1f8 mach_msg_trap + 8
1 libSystem.B.dylib 0x95ed511c mach_msg + 56
2 com.apple.CoreFoundation 0x90d61394 CFRunLoopRunSpecific +
1812
3 com.apple.CFNetwork 0x94de63b0
CFURLCacheWorkerThread(void*) + 288
4 libSystem.B.dylib 0x95f100c4 _pthread_start + 316
Thread 4:
0 libSystem.B.dylib 0x95f31d74 select$DARWIN_EXTSN + 12
1 com.apple.CoreFoundation 0x90d6c808 __CFSocketManager + 764
Thread 5:
0 libSystem.B.dylib 0x95f0f904 kevent + 12
1 com.apple.CoreFoundation 0x90d38a48
__monitor_file_descriptor__ + 240
Thread 6 Crashed:
0 com.apple.CoreFoundation 0x90d5c02c CFRunLoopWakeUp + 156
1 com.apple.Foundation 0x903ad0e4 _backgroundActivity + 440
Thread 6 crashed with PPC Thread State 32:
srr0: 0x90d5c02c srr1: 0x0002d030 dar: 0xf0299ee4 dsisr:
0x42000000
r0: 0x10000004 r1: 0xf0299d50 r2: 0x00000018 r3:
0x10000003
r4: 0x00000011 r5: 0x00000018 r6: 0x00000000 r7:
0x00000000
r8: 0x00000000 r9: 0x00000000 r10: 0x00000000 r11:
0xa098568c
r12: 0x95ece1f0 r13: 0x00000000 r14: 0x00000000 r15:
0x00000000
r16: 0x00000000 r17: 0x00000000 r18: 0x00000000 r19:
0x00000000
r20: 0x00000000 r21: 0x00000000 r22: 0x00000000 r23:
0x00000000
r24: 0x00000000 r25: 0xa097ff98 r26: 0x00007f0b r27:
0x00000001
r28: 0xf0299df8 r29: 0x000001fe r30: 0x001b4cd0 r31:
0x90d5bf98
cr: 0x24000004 xer: 0x00000000 lr: 0x90d5c008 ctr:
0x95ece1f0
vrsave: 0x00000000
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