Oh! I did actually.
The method I posted belongs to an ObjC object which is wrapped by a C++
object.
That C++ object is a singleton (static).
How is this going to affect ARC and why it didn't down-right crash a week
ago before I upgraded Xcode?
Thanks,
Beinan
On Wed, Oct 22, 2014 at 7:00 PM, Kevin Meaney <k...@yvs.eu.com> wrote:
> Your not creating a static C++ object anywhere are you? One that creates
> the dictionary before main gets called by any chance?
>
> Kevin
>
> Sent from my iPhone
>
> > On 22 Oct 2014, at 22:45, Beinan Li <li.bei...@gmail.com> wrote:
> >
> > Note, the initial crashing function is merely translating a C++ enum to
> the
> > AVFoundation builtin constants.
> >
> > Thanks,
> > Beinan
> >
> >
> >> On Wed, Oct 22, 2014 at 5:45 PM, Beinan Li <li.bei...@gmail.com> wrote:
> >>
> >> 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: 0x3bfe1a
>
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