Solving a crash issue iOS

iOS
#1

So I’m looking at my crash logs for my app trying to figure out what it might doing. Here is an example. Read from the bottom up, and it stops at (2)

0 Little Digits 0x00214aaa _ZNSt6vectorIP24ofxiPhoneExternalDisplaySaIS1_EED1Ev + 1694
1 Little Digits 0x002156d4 _ZNSt6vectorIP24ofxiPhoneExternalDisplaySaIS1_EED1Ev + 4808
2 libsystem_c.dylib 0x34f2a7ec _sigtramp + 48
3 Little Digits 0x00000000 + 0
4 AudioToolbox 0x353db48e _ZN10AUIOHelper20NotifyInputAvailableERK14AudioTimeStampmRK15AudioBufferList + 374
5 AudioToolbox 0x353cb792 _ZN10AURemoteIO9PerformIOEjjRK15XAudioTimeStampS2_Ri + 462
6 AudioToolbox 0x353cba96 AURIOCallbackReceiver_PerformIO + 198
7 AudioToolbox 0x353c2a24 _XPerformIO + 184
8 AudioToolbox 0x3532bce2 mshMIGPerform + 374
9 AudioToolbox 0x35396b9c MSHMIGDispatchMessage + 28
10 AudioToolbox 0x353cb2f0 _ZN10AURemoteIO8IOThread3RunEv + 64
11 AudioToolbox 0x353cef48 _ZN10AURemoteIO8IOThread5EntryEPv + 8
12 AudioToolbox 0x3530bca2 _ZN9CAPThread5EntryEPS_ + 214
13 libsystem_c.dylib 0x34ee1734 _pthread_start + 320
14 libsystem_c.dylib 0x34ee15ef thread_start + 7

The only thing I can see there stepping through is:

NotifyInputAvailableERK14AudioTimeStampmRK15AudioBufferList

I just found this on google
http://stackoverflow.com/questions/7354964/intermittent-crash-in-recordingcallback-on-app-launch

perhaps related?

my code looks a bit like this:

  
  
class soundRecording: public ofBaseSoundInput{  
  
  init(){  
    soundStream.setInput(this);  
    soundStream.setup(0, 1, sampleRate, startBufferSize, 4);  
 }  
  
}

Any thoughts appreciated. Thanks.

#2

So I am back to looking at this bug as it is happening lots.

I emailed the crash analytics to check if my report was syndicated properly, but they emailed back an insight into the crash above:

"A delegate (or callback of some kind) is being used with AudioToolbox which at some point during execution has its object deallocated from memory.

My reasoning goes like this:

  1. The exception reason is SIGSEGV which indicates that a bad memory address was accessed.
  2. _sigtramp is the source of the exception which indicates that the exception occurred while attempting to run a callback (delegate).
  3. AudioToolbox can be seen all over the stack trace, but line 6 is the important one, it refers to a CallbackReceiver."

Anyone have any thoughts re the above?

Here is another crash report on a (probably seperate) issue…

2 libsystem_c.dylib 0x32bf7e92 _sigtramp + 42
3 UIKit 0x3570037a -[UIViewController _setViewAppearState:isAnimating:] + 226
4 UIKit 0x357274ec -[UIViewController applicationWantsViewsToDisappear] + 88
5 CoreFoundation 0x38766036 _CFXNotificationPost + 1426
6 Foundation 0x37710d90 -[NSNotificationCenter postNotificationName:object:userInfo:] + 72
7 Foundation 0x37714852 -[NSNotificationCenter postNotificationName:object:] + 30
8 UIKit 0x3572465e -[UIApplication _handleApplicationSuspend:eventInfo:] + 2182
9 UIKit 0x3569a1ee -[UIApplication handleEvent:withNewEvent:] + 2458
10 UIKit 0x356996d4 -[UIApplication sendEvent:] + 72
11 UIKit 0x35699122 _UIApplicationHandleEvent + 6154
12 GraphicsServices 0x346965a2 _PurpleEventCallback + 590
13 GraphicsServices 0x346961d2 PurpleEventCallback + 34
14 CoreFoundation 0x387ea172 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 34
15 CoreFoundation 0x387ea116 __CFRunLoopDoSource1 + 138
16 CoreFoundation 0x387e8f98 __CFRunLoopRun + 1384
17 CoreFoundation 0x3875bebc CFRunLoopRunSpecific + 356
18 CoreFoundation 0x3875bd48 CFRunLoopRunInMode + 104
19 GraphicsServices 0x346952ea GSEventRunModal + 74
20 UIKit 0x356ed300 UIApplicationMain + 1120
21 Little Digits 0x001cf4dc _ZN17ofAppiPhoneWindow20startAppWithDelegateESs + 168
22 Little Digits 0x001cf364 _ZN17ofAppiPhoneWindow21runAppViaInfiniteLoopEP9ofBaseApp + 200
23 Little Digits 0x001dd7ce _Z8ofRunAppP9ofBaseApp + 422
24 Little Digits 0x000027aa main (main.mm:13)
25 Little Digits 0x0000271b start + 39

Seems it only goes as far as 0startAppWithDelegate in ofAppiPhoneWindow.

Hmm.

#3

Hi, I know this is from 2012, but were you able to fix this [UIViewController _setViewAppearState:isAnimating] crash? I’m running into the same problem.

Thanks!