Re: Crash with ARC enabled on Xcode 6.1
Re: Crash with ARC enabled on Xcode 6.1
- Subject: Re: Crash with ARC enabled on Xcode 6.1
- From: Beinan Li <email@hidden>
- Date: Wed, 22 Oct 2014 17:45:07 -0400
It is quite unpredictable.
At first it crashes at a dictionary creation line in a .mm implementation
like this:
- (NSString*) getAVAudioSessionMode:(myAudioSessionMode)modeKey {
NSDictionary* modeDict = @{ // Here it crashes
@(myAudioSessionModeDefault): AVAudioSessionModeDefault,
@(myAudioSessionModeVoiceChat): AVAudioSessionModeVoiceChat,
@(myAudioSessionModeGameChat): AVAudioSessionModeGameChat,
@(myAudioSessionModeVideoRecording): AVAudioSessionModeVideoRecording,
@(myAudioSessionModeMeasurement): AVAudioSessionModeMeasurement,
@(myAudioSessionModeMoviePlayback): AVAudioSessionModeMoviePlayback,
@(myAudioSessionModeVideoChat): AVAudioSessionModeVideoChat
};
NSString* mode = [modeDict objectForKey:@(mySettings.audioSession.eMode)];
return mode;
}
The backtrace gives me:
* thread #1: tid = 0x2403, 0x0013148c MyDemo`-[MyImp
getAVAudioSessionMode:](self=0x1e839a80, _cmd=0x002d3077,
modeKey=myAudioSessionModeDefault) + 676 at MyImp.mm:78, queue =
'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x0)
* frame #0:
0x0013148c MyDemo -[MyImp getAVAudioSessionMode:](self=0x1e839a80,
_cmd=0x002d3077, modeKey=myAudioSessionModeDefault) + 676 at MyImp.mm:78
Then if I remove this dictionary all together and do it like this:
- (NSString*) getAVAudioSessionMode:(myAudioSessionMode)modeKey {
return AVAudioSessionModeDefault;
}
Then I get a crash right in the main.mm:
int retVal = UIApplicationMain(argc, argv, nil, @"MyDemoAppDelegate");
backtrace:
* thread #1: tid = 0x2403, 0x3c4df350 libsystem_kernel.dylib`__pthread_kill
+ 8, queue = 'com.apple.main-thread', stop reason = signal SIGABRT
frame #0: 0x3c4df350 libsystem_kernel.dylib`__pthread_kill + 8
frame #1: 0x3c456122 libsystem_c.dylib`pthread_kill + 58
frame #2: 0x3c492972 libsystem_c.dylib`abort + 94
frame #3: 0x3ba30d4e libc++abi.dylib`abort_message + 74
frame #4: 0x3ba2dff8 libc++abi.dylib`default_terminate() + 24
frame #5: 0x3bfe1a76 libobjc.A.dylib`_objc_terminate() + 146
frame #6: 0x3ba2e07a libc++abi.dylib`safe_handler_caller(void (*)()) +
78
frame #7: 0x3ba2e114 libc++abi.dylib`std::terminate() + 20
frame #8: 0x3ba2f598 libc++abi.dylib`__cxa_rethrow + 88
frame #9: 0x3bfe19d0 libobjc.A.dylib`objc_exception_rethrow + 12
frame #10: 0x34243f20 CoreFoundation`CFRunLoopRunSpecific + 456
frame #11: 0x34243d48 CoreFoundation`CFRunLoopRunInMode + 104
frame #12: 0x3615c484 UIKit`-[UIApplication _run] + 668
frame #13: 0x36159300 UIKit`UIApplicationMain + 1120
* frame #14: 0x00033212 MyDemo`main(argc=1, argv=0x2fdd6c68) + 378 at
main.mm:27
Something tells me that this is a memory bug.
Thanks,
Beinan
Thanks,
Beinan
On Wed, Oct 22, 2014 at 5:12 PM, David Duncan <email@hidden>
wrote:
> How is your application crashing?
>
> > On Oct 22, 2014, at 2:10 PM, Beinan Li <email@hidden> wrote:
> >
> > Hi CocoaDev,
> >
> > Not sure if it's the right list to post to.
> >
> > My iOS app is coded in Obj-C++ with the ObjC part using ARC.
> > It seemed to work well with Xcode 6.0.x and iOS 8.0 SDK.
> >
> > However, on Xcode 6.1 and iOS 8.1 SDK it starts to crash right away.
> > And it stops crashing if I turn off ARC.
> >
> > I wonder if there are changes in Xcode 6.1 that I need to know about
> > to fix this.
> >
> > Thanks,
> > Beinan
> > _______________________________________________
> >
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> --
> David Duncan
>
>
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