问题
Does anyone have any insight on why this crash log is happening? The app records the locations where the user goes. So it has the UIBackgroundModes's Location is set in Info.plist to continue getting location updates in background. According to the log, something seems to crash after 10 minutes.
Incident Identifier: 4BA294E8-0DDF-4EC2-812A-20394F758A7F
CrashReporter Key: 59997a4e160853691bc673802439c8c4b9ca7ba3
Hardware Model: iPhone3,1
Process: MyMapApp [1234]
Path: /var/mobile/Applications/826E35FE-F6B7-477E-943E-CE18D0D03145/MyMapApp.app/MyMapApp
Identifier: MyMapApp
Version: ??? (???)
Code Type: ARM (Native)
Parent Process: launchd [1]
Date/Time: 2011-03-02 13:25:05.228 -0600
OS Version: iPhone OS 4.2.1 (8C148)
Report Version: 104
Exception Type: 00000020
Exception Codes: 0x8badf00d
Highlighted Thread: 0
Application Specific Information:
MyMapApp[1234] has active assertions beyond permitted time:
{(
<SBProcessAssertion: 0x63a07a0> identifier: CoreLocationRegistration process: MyMapApp[1234] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1234 preventSuspend preventIdleSleep ,
<SBProcessAssertion: 0xa095050> identifier: CoreLocationBackgroundClient process: MyMapApp[1234] permittedBackgroundDuration: 600.000000 reason: finishTask owner pid:1234 preventSuspend preventIdleSleep
)}
Elapsed total CPU time (seconds): 43.660 (user 17.920, system 25.740), 7% CPU
Elapsed application CPU time (seconds): 1.500, 0% CPU
Thread 0:
0 libSystem.B.dylib 0x33b5d268 mach_msg_trap + 20
1 libSystem.B.dylib 0x33b5f354 mach_msg + 44
2 CoreFoundation 0x33a48648 __CFRunLoopServiceMachPort + 88
3 CoreFoundation 0x33a47ed2 __CFRunLoopRun + 350
4 CoreFoundation 0x33a47c80 CFRunLoopRunSpecific + 224
5 CoreFoundation 0x33a47b88 CFRunLoopRunInMode + 52
6 GraphicsServices 0x33b0e4a4 GSEventRunModal + 108
7 GraphicsServices 0x33b0e550 GSEventRun + 56
8 UIKit 0x32099322 -[UIApplication _run] + 406
9 UIKit 0x32096e8c UIApplicationMain + 664
10 MyMapApp 0x00105546 main (main.m:50)
11 MyMapApp 0x00003f4c start + 44
Thread 1:
0 libSystem.B.dylib 0x33b89974 kevent + 24
1 libSystem.B.dylib 0x33c33704 _dispatch_mgr_invoke + 88
2 libSystem.B.dylib 0x33c33174 _dispatch_queue_invoke + 96
3 libSystem.B.dylib 0x33c32b98 _dispatch_worker_thread2 + 120
4 libSystem.B.dylib 0x33bd724a _pthread_wqthread + 258
5 libSystem.B.dylib 0x33bcf970 start_wqthread + 0
Thread 2:
0 libSystem.B.dylib 0x33b5d268 mach_msg_trap + 20
1 libSystem.B.dylib 0x33b5f354 mach_msg + 44
2 CoreFoundation 0x33a48648 __CFRunLoopServiceMachPort + 88
3 CoreFoundation 0x33a47ed2 __CFRunLoopRun + 350
4 CoreFoundation 0x33a47c80 CFRunLoopRunSpecific + 224
5 CoreFoundation 0x33a47b88 CFRunLoopRunInMode + 52
6 WebCore 0x304df124 RunWebThread(void*) + 332
7 libSystem.B.dylib 0x33bd6886 _pthread_start + 242
8 libSystem.B.dylib 0x33bcba88 thread_start + 0
Thread 3:
0 libSystem.B.dylib 0x33b5d268 mach_msg_trap + 20
1 libSystem.B.dylib 0x33b5f354 mach_msg + 44
2 CoreFoundation 0x33a48648 __CFRunLoopServiceMachPort + 88
3 CoreFoundation 0x33a47ed2 __CFRunLoopRun + 350
4 CoreFoundation 0x33a47c80 CFRunLoopRunSpecific + 224
5 CoreFoundation 0x33a47b88 CFRunLoopRunInMode + 52
6 Foundation 0x336465f6 +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:] + 206
7 Foundation 0x33624192 -[NSThread main] + 38
8 Foundation 0x3361d242 __NSThread__main__ + 966
9 libSystem.B.dylib 0x33bd6886 _pthread_start + 242
10 libSystem.B.dylib 0x33bcba88 thread_start + 0
Thread 4:
0 libSystem.B.dylib 0x33bd59f0 __semwait_signal + 24
1 libSystem.B.dylib 0x33b8a7ec _pthread_cond_wait + 748
2 libSystem.B.dylib 0x33b8a3d2 pthread_cond_wait + 26
3 CoreMedia 0x31a41b14 WaitOnCondition + 4
4 CoreMedia 0x31a41a5a FigSemaphoreWaitRelative + 66
5 MediaToolbox 0x300c0c9c fpa_AsyncMovieControlThread + 48
6 CoreMedia 0x31a5df76 figThreadMain + 166
7 libSystem.B.dylib 0x33bd6886 _pthread_start + 242
8 libSystem.B.dylib 0x33bcba88 thread_start + 0
Thread 5:
0 libSystem.B.dylib 0x33b8168c select$DARWIN_EXTSN + 20
1 CoreFoundation 0x33a7f662 __CFSocketManager + 582
2 libSystem.B.dylib 0x33bd6886 _pthread_start + 242
3 libSystem.B.dylib 0x33bcba88 thread_start + 0
Thread 6:
0 libSystem.B.dylib 0x33b5d268 mach_msg_trap + 20
1 libSystem.B.dylib 0x33b5f354 mach_msg + 44
2 CoreFoundation 0x33a48648 __CFRunLoopServiceMachPort + 88
3 CoreFoundation 0x33a47ed2 __CFRunLoopRun + 350
4 CoreFoundation 0x33a47c80 CFRunLoopRunSpecific + 224
5 CoreFoundation 0x33a47b88 CFRunLoopRunInMode + 52
6 MapKit 0x31be8906 TileCachePrivate::runCacheThread() + 274
7 MapKit 0x31be87ea _runCacheThread(void*) + 2
8 libSystem.B.dylib 0x33bd6886 _pthread_start + 242
9 libSystem.B.dylib 0x33bcba88 thread_start + 0
Thread 7:
0 libSystem.B.dylib 0x33bd59f0 __semwait_signal + 24
1 libSystem.B.dylib 0x33b8a7ec _pthread_cond_wait + 748
2 libSystem.B.dylib 0x33b8a3d2 pthread_cond_wait + 26
3 QuartzCore 0x3412e5dc CA::DispatchGroup::thread(void*) + 84
4 QuartzCore 0x340fb01a thread_fun + 10
5 libSystem.B.dylib 0x33bd6886 _pthread_start + 242
6 libSystem.B.dylib 0x33bcba88 thread_start + 0
Thread 8:
0 libSystem.B.dylib 0x33b5d268 mach_msg_trap + 20
1 libSystem.B.dylib 0x33b5f354 mach_msg + 44
2 CoreFoundation 0x33a48648 __CFRunLoopServiceMachPort + 88
3 CoreFoundation 0x33a47ed2 __CFRunLoopRun + 350
4 CoreFoundation 0x33a47c80 CFRunLoopRunSpecific + 224
5 CoreFoundation 0x33a47b88 CFRunLoopRunInMode + 52
6 MapKit 0x31bf327e +[NSThread(MKAdditions) _mapkit_runThread:] + 334
7 Foundation 0x33624192 -[NSThread main] + 38
8 Foundation 0x3361d242 __NSThread__main__ + 966
9 libSystem.B.dylib 0x33bd6886 _pthread_start + 242
10 libSystem.B.dylib 0x33bcba88 thread_start + 0
Thread 9:
0 libSystem.B.dylib 0x33b5d268 mach_msg_trap + 20
1 libSystem.B.dylib 0x33b5f354 mach_msg + 44
2 CoreFoundation 0x33a48648 __CFRunLoopServiceMachPort + 88
3 CoreFoundation 0x33a47ed2 __CFRunLoopRun + 350
4 CoreFoundation 0x33a47c80 CFRunLoopRunSpecific + 224
5 CoreFoundation 0x33a47b88 CFRunLoopRunInMode + 52
6 AudioToolbox 0x316504ba GenericRunLoopThread::RunLoop() + 30
7 AudioToolbox 0x31663306 TRunLoop<AQClient>::Entry(void*) + 90
8 AudioToolbox 0x316501d2 CAPThread::Entry(CAPThread*) + 138
9 libSystem.B.dylib 0x33bd6886 _pthread_start + 242
10 libSystem.B.dylib 0x33bcba88 thread_start + 0
Unknown thread crashed with unknown flavor: 5, state_count: 1
回答1:
Are you by any chance calling beginBackgroundTaskWithExpirationHandler: without calling a corresponding endBackgroundTask:?
http://developer.apple.com/library/ios/#documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/BackgroundExecution/BackgroundExecution.html
来源：https://stackoverflow.com/questions/5183171/myapp-has-active-assertions-beyond-permitted-time-crash-corelocationregistra