Re: [Jack-Devel] [jack2] hang on jack_deactivate

1) Which jack version?

2) I don't understand this "jack_client_has_session_callback"  and "TransportReposition" code stack, can you describe more?

Thanks.

Stéphane 


Le 16 mai 2012 à 11:30, tim a écrit :

> another jack2 issue: when running my application inside a debugger,
> calls to jack_deactivate deadlock the application.
> 
> this thread calls jack_deactivate, pthread_join hangs:
> 
>> 0 pthread_join     PC=0x7fa70a51d148, FP=0x7fffbcaa7740 [/usr/lib/debug/lib/x86_64-linux-gnu/libpthread-2.15.so]
>   1 _ZN4Jack15JackDebugClient19TransportRepositionEP15jack_position_t
> PC=0x7fa70b9914d4, FP=0x7fffbcaa7760
> [/usr/lib/x86_64-linux-gnu/libjack.so.0]
>   2 jack_client_has_session_callback PC=0x7fa70b97db87,
> FP=0x7fffbcaa7790 [/usr/lib/x86_64-linux-gnu/libjack.so.0]
> 
> 
> the other jack-related threads are in the following state:
> 
>> 0 pthread_cond_wait PC=0x7fa70a51fd84, FP=0x7fa6f5115db0 [/usr/lib/debug/lib/x86_64-linux-gnu/libpthread-2.15.so]
>   1 _ZN4Jack15JackDebugClient19TransportRepositionEP15jack_position_t
> PC=0x7fa70b9927ff, FP=0x7fa6f5115dd0
> [/usr/lib/x86_64-linux-gnu/libjack.so.0]
>   2 _ZN4Jack15JackDebugClient19TransportRepositionEP15jack_position_t
> PC=0x7fa70b98ddac, FP=0x7fa6f5115e00
> [/usr/lib/x86_64-linux-gnu/libjack.so.0]
>   3 _ZN4Jack15JackDebugClient19TransportRepositionEP15jack_position_t
> PC=0x7fa70b9911ad, FP=0x7fa6f5115e20
> [/usr/lib/x86_64-linux-gnu/libjack.so.0]
>   4 start_thread     PC=0x7fa70a51be93, FP=0x7fa6f5115f30
> [/usr/lib/debug/lib/x86_64-linux-gnu/libpthread-2.15.so]
> 
>> 0 __read_nocancel  PC=0x7fa70a522d2d, FP=0x7fa6f5094c20 [/usr/lib/debug/lib/x86_64-linux-gnu/libpthread-2.15.so]
>   1 _ZN4Jack15JackDebugClient19TransportRepositionEP15jack_position_t
> PC=0x7fa70b992fb5, FP=0x7fa6f5094c50
> [/usr/lib/x86_64-linux-gnu/libjack.so.0]
>   2 jack_get_client_pid PC=0x7fa70b995961, FP=0x7fa6f5094e00
> [/usr/lib/x86_64-linux-gnu/libjack.so.0]
>   3 _ZN4Jack15JackDebugClient19TransportRepositionEP15jack_position_t
> PC=0x7fa70b9911ad, FP=0x7fa6f5094e20
> [/usr/lib/x86_64-linux-gnu/libjack.so.0]
>   4 start_thread     PC=0x7fa70a51be93, FP=0x7fa6f5094f30
> [/usr/lib/debug/lib/x86_64-linux-gnu/libpthread-2.15.so]
> 
>> 0 sem_timedwait    PC=0x7fa70a5220c1, FP=0x7fa6f5013d10 [/usr/lib/debug/lib/x86_64-linux-gnu/libpthread-2.15.so]
>   1 _ZN4Jack15JackDebugClient19TransportRepositionEP15jack_position_t
> PC=0x7fa70b991bcd, FP=0x7fa6f5013d60
> [/usr/lib/x86_64-linux-gnu/libjack.so.0]
>   2 _ZStplIcSt11char_traitsIcESaIcEESbIT_T0_T1_ERKS6_S8_
> PC=0x7fa70b9806c4, FP=0x7fa6f5013d80
> [/usr/lib/x86_64-linux-gnu/libjack.so.0]
>   3 jack_client_has_session_callback PC=0x7fa70b97dcf6,
> FP=0x7fa6f5013e00 [/usr/lib/x86_64-linux-gnu/libjack.so.0]
>   4 _ZN4Jack15JackDebugClient19TransportRepositionEP15jack_position_t
> PC=0x7fa70b9911ad, FP=0x7fa6f5013e20
> [/usr/lib/x86_64-linux-gnu/libjack.so.0]
>   5 start_thread     PC=0x7fa70a51be93, FP=0x7fa6f5013f30
> [/usr/lib/debug/lib/x86_64-linux-gnu/libpthread-2.15.so]
> 
> looks like a classic dead-lock: the second thread waits for a condition
> and the first thread waits for the second thread (or maybe another
> thread) ... maybe some of the other threads are involved as well ...
> 
> hth, tim
> 
> 
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