[Jack-Devel] [jack2] hang on jack_deactivate

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

1337160666.2343_0.ltw:2,a <jovs3r$gbv$1 at dough dot gmane dot org>