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I am developing an iPad application, I am facing a crash issue, but unable to find the cause behind it.
After crash it points to main.mm file only.
Try:
- NSLogs
- NSZombiEnabled
Below is the crash log. As of my knowledge, it is using some memory location which has already been freed. But how to identify, which object it is?
Incident Identifier: AF769A76-ADB4-4C3C-9A94-E0B45A994B42
CrashReporter Key: 7443d58afe6b6a3df23c273ba834f8ae4814a7ce
Hardware Model: iPad2,1
Process: BLSOffline [3255]
Path: /var/mobile/Applications/A4C2BB5D-0FE4-4A4D-B1D6-FF6E0183F4EE/BLSOffline.app/BLSOffline
Identifier: com.bentley.LearnInHouse
Version: 1.0 (1.0)
Code Type: ARM (Native)
Parent Process: launchd [1]
Date/Time: 2013-12-02 18:29:21.692 +0530
OS Version: iOS 7.0.4 (11B554a)
Report Version: 104
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x6192010b
Triggered by Thread: 0
Thread 0 Crashed:
0 libobjc.A.dylib 0x3a92db26 objc_msgSend + 6
1 MediaPlayer 0x314a2540 -[MPMoviePlayerControllerNew _moviePlayerWillBecomeActiveNotification:] + 472
2 CoreFoundation 0x30223116 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 10
3 CoreFoundation 0x30197252 _CFXNotificationPost + 1714
4 Foundation 0x30b7cc28 -[NSNotificationCenter postNotificationName:object:userInfo:] + 72
5 MediaPlayer 0x314a4a60 -[MPMoviePlayerControllerNew _postNotificationName:object:userInfo:] + 96
6 MediaPlayer 0x314a49f0 -[MPMoviePlayerControllerNew _postNotificationName:object:] + 40
7 MediaPlayer 0x314a43d4 -[MPMoviePlayerControllerNew _ensureActive] + 128
8 MediaPlayer 0x314a44a2 -[MPMoviePlayerControllerNew _prepareToPlayWithStartIndex:] + 66
9 MediaPlayer 0x314a009c -[MPMoviePlayerControllerNew prepareToPlay] + 40
10 MediaPlayer 0x314a0100 -[MPMoviePlayerControllerNew play] + 44
11 MediaPlayer 0x314a2b2e -[MPMoviePlayerControllerNew _movieSourceTypeAvailableNotification:] + 350
12 CoreFoundation 0x30223116 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 10
13 CoreFoundation 0x30197252 _CFXNotificationPost + 1714
14 Foundation 0x30b7cc28 -[NSNotificationCenter postNotificationName:object:userInfo:] + 72
15 Foundation 0x30b81506 -[NSNotificationCenter postNotificationName:object:] + 26
16 MediaPlayer 0x31525b00 -[MPMovie _determineMediaType] + 152
17 Foundation 0x30c3b386 __NSFireDelayedPerform + 410
18 CoreFoundation 0x3022c0dc __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 12
19 CoreFoundation 0x3022bcf2 __CFRunLoopDoTimer + 778
20 CoreFoundation 0x3022a08e __CFRunLoopRun + 1206
21 CoreFoundation 0x30194c22 CFRunLoopRunSpecific + 518
22 CoreFoundation 0x30194a06 CFRunLoopRunInMode + 102
23 GraphicsServices 0x34e6827e GSEventRunModal + 134
24 UIKit 0x32a38044 UIApplicationMain + 1132
25 BLSOffline 0x00116c0e 0xee000 + 166926
26 libdyld.dylib 0x3ae3aab4 start + 0
Thread 1 name: gputools.smt_poll.0x14632d20
Thread 1:
0 libsystem_kernel.dylib 0x3aef1550 __semwait_signal + 24
1 libsystem_c.dylib 0x3ae62808 nanosleep + 168
2 libsystem_c.dylib 0x3ae62756 usleep + 46
3 GPUToolsCore 0x02292f34 smt_poll_thread_entry(void*) + 120
4 libsystem_pthread.dylib 0x3af59c1a _pthread_body + 138
5 libsystem_pthread.dylib 0x3af59b8a _pthread_start + 98
6 libsystem_pthread.dylib 0x3af57c8c thread_start + 4
Thread 2:
0 libsystem_kernel.dylib 0x3aede83c kevent64 + 24
1 libdispatch.dylib 0x3ae1f210 _dispatch_mgr_invoke + 228
2 libdispatch.dylib 0x3ae1ef96 _dispatch_mgr_thread$VARIANT$mp + 34
Thread 3 name: WebThread
Thread 3:
0 libsystem_kernel.dylib 0x3aef0fa8 __psynch_mutexwait + 24
1 libsystem_pthread.dylib 0x3af57f0a _pthread_mutex_lock + 302
2 WebCore 0x383037f0 _WebTryThreadLock(bool) + 104
3 WebCore 0x38303772 WebRunLoopLock(__CFRunLoopObserver*, unsigned long, void*) + 42
4 CoreFoundation 0x3022c1ca __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 18
5 CoreFoundation 0x30229b6c __CFRunLoopDoObservers + 280
6 CoreFoundation 0x30229f7c __CFRunLoopRun + 932
7 CoreFoundation 0x30194c22 CFRunLoopRunSpecific + 518
8 CoreFoundation 0x30194a06 CFRunLoopRunInMode + 102
9 WebCore 0x38302266 RunWebThread(void*) + 414
10 libsystem_pthread.dylib 0x3af59c1a _pthread_body + 138
11 libsystem_pthread.dylib 0x3af59b8a _pthread_start + 98
12 libsystem_pthread.dylib 0x3af57c8c thread_start + 4
Thread 4:
0 libsystem_kernel.dylib 0x3aedea8c mach_msg_trap + 20
1 libsystem_kernel.dylib 0x3aede888 mach_msg + 44
2 CoreFoundation 0x3022b7be __CFRunLoopServiceMachPort + 150
3 CoreFoundation 0x30229ee4 __CFRunLoopRun + 780
4 CoreFoundation 0x30194c22 CFRunLoopRunSpecific + 518
5 CoreFoundation 0x30194a06 CFRunLoopRunInMode + 102
6 libAVFAudio.dylib 0x2f217584 GenericRunLoopThread::Entry(void*) + 124
7 libAVFAudio.dylib 0x2f20b99c CAPThread::Entry(CAPThread*) + 176
8 libsystem_pthread.dylib 0x3af59c1a _pthread_body + 138
9 libsystem_pthread.dylib 0x3af59b8a _pthread_start + 98
10 libsystem_pthread.dylib 0x3af57c8c thread_start + 4
Thread 5 name: JavaScriptCore::BlockFree
Thread 5:
0 libsystem_kernel.dylib 0x3aef0f38 __psynch_cvwait + 24
1 libsystem_pthread.dylib 0x3af59224 _pthread_cond_wait + 536
2 libsystem_pthread.dylib 0x3af5a000 pthread_cond_wait + 36
3 JavaScriptCore 0x311b9d50 JSC::BlockAllocator::blockFreeingThreadMain() + 204
4 JavaScriptCore 0x311b73a0 WTF::wtfThreadEntryPoint(void*) + 12
5 libsystem_pthread.dylib 0x3af59c1a _pthread_body + 138
6 libsystem_pthread.dylib 0x3af59b8a _pthread_start + 98
7 libsystem_pthread.dylib 0x3af57c8c thread_start + 4
Thread 6 name: JavaScriptCore::Marking
Thread 6:
0 libsystem_kernel.dylib 0x3aef0f38 __psynch_cvwait + 24
1 libsystem_pthread.dylib 0x3af59224 _pthread_cond_wait + 536
2 libsystem_pthread.dylib 0x3af5a000 pthread_cond_wait + 36
3 JavaScriptCore 0x31355236 JSC::GCThread::waitForNextPhase() + 74
4 JavaScriptCore 0x31355290 JSC::GCThread::gcThreadMain() + 48
5 JavaScriptCore 0x311b73a0 WTF::wtfThreadEntryPoint(void*) + 12
6 libsystem_pthread.dylib 0x3af59c1a _pthread_body + 138
7 libsystem_pthread.dylib 0x3af59b8a _pthread_start + 98
8 libsystem_pthread.dylib 0x3af57c8c thread_start + 4
Thread 7 name: WebCore: CFNetwork Loader
Thread 7:
0 libsystem_kernel.dylib 0x3aedea8c mach_msg_trap + 20
1 libsystem_kernel.dylib 0x3aede888 mach_msg + 44
2 CoreFoundation 0x3022b7be __CFRunLoopServiceMachPort + 150
3 CoreFoundation 0x30229ee4 __CFRunLoopRun + 780
4 CoreFoundation 0x30194c22 CFRunLoopRunSpecific + 518
5 CoreFoundation 0x30194a06 CFRunLoopRunInMode + 102
6 WebCore 0x3834ad5a WebCore::runLoaderThread(void*) + 250
7 JavaScriptCore 0x311b73a0 WTF::wtfThreadEntryPoint(void*) + 12
8 libsystem_pthread.dylib 0x3af59c1a _pthread_body + 138
9 libsystem_pthread.dylib 0x3af59b8a _pthread_start + 98
10 libsystem_pthread.dylib 0x3af57c8c thread_start + 4
Thread 8 name: com.apple.NSURLConnectionLoader
Thread 8:
0 libsystem_kernel.dylib 0x3aedea8c mach_msg_trap + 20
1 libsystem_kernel.dylib 0x3aede888 mach_msg + 44
2 CoreFoundation 0x3022b7be __CFRunLoopServiceMachPort + 150
3 CoreFoundation 0x30229ee4 __CFRunLoopRun + 780
4 CoreFoundation 0x30194c22 CFRunLoopRunSpecific + 518
5 CoreFoundation 0x30194a06 CFRunLoopRunInMode + 102
6 Foundation 0x30bcf2f2 +[NSURLConnection(Loader) _resourceLoadLoop:] + 314
7 Foundation 0x30c44c82 __NSThread__main__ + 1058
8 libsystem_pthread.dylib 0x3af59c1a _pthread_body + 138
9 libsystem_pthread.dylib 0x3af59b8a _pthread_start + 98
10 libsystem_pthread.dylib 0x3af57c8c thread_start + 4
Thread 9 name: com.apple.CFSocket.private
Thread 9:
0 libsystem_kernel.dylib 0x3aef1440 __select + 20
1 CoreFoundation 0x3022f680 __CFSocketManager + 480
2 libsystem_pthread.dylib 0x3af59c1a _pthread_body + 138
3 libsystem_pthread.dylib 0x3af59b8a _pthread_start + 98
4 libsystem_pthread.dylib 0x3af57c8c thread_start + 4
Thread 10 name: WebCore: LocalStorage
Thread 10:
0 libsystem_kernel.dylib 0x3aef0f38 __psynch_cvwait + 24
1 libsystem_pthread.dylib 0x3af59224 _pthread_cond_wait + 536
2 libsystem_pthread.dylib 0x3af5a000 pthread_cond_wait + 36
3 JavaScriptCore 0x311b9e82 WTF::ThreadCondition::timedWait(WTF::Mutex&, double) + 58
4 WebCore 0x384353a8 WTF::PassOwnPtr<WTF::Function<void ()> > WTF::MessageQueue<WTF::Function<void ()> >::waitForMessageFilteredWithTimeout<bool (WTF::Function<void ()>*)>(WTF::MessageQueueWaitResult&, bool (&)(WTF::Function<void ()>*), double) + 104
5 WebCore 0x3843532e WebCore::StorageThread::threadEntryPoint() + 162
6 JavaScriptCore 0x311b73a0 WTF::wtfThreadEntryPoint(void*) + 12
7 libsystem_pthread.dylib 0x3af59c1a _pthread_body + 138
8 libsystem_pthread.dylib 0x3af59b8a _pthread_start + 98
9 libsystem_pthread.dylib 0x3af57c8c thread_start + 4
Thread 11 name: com.apple.coremedia.player.async
Thread 11:
0 libsystem_kernel.dylib 0x3aedeadc semaphore_wait_trap + 8
1 libdispatch.dylib 0x3ae1d428 _dispatch_semaphore_wait_slow + 172
2 MediaToolbox 0x3168083c fpa_AsyncMovieControlThread + 1752
3 CoreMedia 0x307bf234 figThreadMain + 192
4 libsystem_pthread.dylib 0x3af59c1a _pthread_body + 138
5 libsystem_pthread.dylib 0x3af59b8a _pthread_start + 98
6 libsystem_pthread.dylib 0x3af57c8c thread_start + 4
Thread 12 name: com.apple.coremedia.player.remote
Thread 12:
0 libsystem_kernel.dylib 0x3aedea8c mach_msg_trap + 20
1 libsystem_kernel.dylib 0x3aede888 mach_msg + 44
2 MediaToolbox 0x31686c58 FigExpressNotificationThread + 84
3 CoreMedia 0x307bf234 figThreadMain + 192
4 libsystem_pthread.dylib 0x3af59c1a _pthread_body + 138
5 libsystem_pthread.dylib 0x3af59b8a _pthread_start + 98
6 libsystem_pthread.dylib 0x3af57c8c thread_start + 4
Thread 13:
0 libsystem_kernel.dylib 0x3aef1c7c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x3af57dc6 _pthread_wqthread + 306
2 libsystem_pthread.dylib 0x3af57c80 start_wqthread + 4
Thread 14:
0 libsystem_kernel.dylib 0x3aef1c7c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x3af57dc6 _pthread_wqthread + 306
2 libsystem_pthread.dylib 0x3af57c80 start_wqthread + 4
Thread 15 name: com.apple.coremedia.player.async
Thread 15:
0 libsystem_kernel.dylib 0x3aedeadc semaphore_wait_trap + 8
1 libdispatch.dylib 0x3ae1d428 _dispatch_semaphore_wait_slow + 172
2 MediaToolbox 0x3168083c fpa_AsyncMovieControlThread + 1752
3 CoreMedia 0x307bf234 figThreadMain + 192
4 libsystem_pthread.dylib 0x3af59c1a _pthread_body + 138
5 libsystem_pthread.dylib 0x3af59b8a _pthread_start + 98
6 libsystem_pthread.dylib 0x3af57c8c thread_start + 4
Thread 16:
0 libsystem_kernel.dylib 0x3aef1c7c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x3af57dc6 _pthread_wqthread + 306
2 libsystem_pthread.dylib 0x3af57c80 start_wqthread + 4
Thread 0 crashed with ARM Thread State (32-bit):
r0: 0x145cb7d0 r1: 0x31617754 r2: 0x3b3091a0 r3: 0x00000000
r4: 0x1918aea0 r5: 0x145cb7d0 r6: 0x00000000 r7: 0x27d134f8
r8: 0x00000000 r9: 0x619200ff r10: 0x31617754 r11: 0x145cb7ec
ip: 0x3b2cd2a4 sp: 0x27d134c0 lr: 0x314a2545 pc: 0x3a92db26
cpsr: 0x60000030
802
It seems as if you are forgetting to remove an observer for the movie callbacks:
-(void) dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
It's likely that the movie player (via NSNotificationCenter) is the object that is using some memory location which has already been freed when it tries to notify its observers
128
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