Hello,
I am running pjsua 1.14.2 on OpenBSD.
OpenBSD pthreads (rthreads) has a debugging statement in its
pthread_mutex_destroy function to let you know if pthread_mutex_destroy
is called with waiters.
int
pthread_mutex_destroy(pthread_mutex_t *mutexp)
{
struct pthread_mutex *mutex;
assert(mutexp);
mutex = (struct pthread_mutex *)*mutexp;
if (mutex) {
if (mutex->count || mutex->owner != NULL ||
!TAILQ_EMPTY(&mutex->lockers)) {
#define MSG "pthread_mutex_destroy on mutex with waiters!\n"
write(2, MSG, sizeof(MSG) - 1);
#undef MSG
return (EBUSY);
}
free(mutex);
*mutexp = NULL;
}
return (0);
}
Running pjsua, my screen is spammed with "pthread_mutex_destroy on mutex
with waiters!" every couple of seconds. I think pj_mutex_destroy is
being called too early here...
I have provided a backtrace from GDB.
(gdb) bt
#0 pj_mutex_destroy (mutex=0x7c1283b8) at ../src/pj/os_core_unix.c:1350
#1 0x1c04bb18 in pjsip_tx_data_dec_ref (tdata=0x7c128064) at ../src/pjsip/sip_transport.c:446
#2 0x1c056050 in tsx_destroy (tsx=0x7c12a864) at ../src/pjsip/sip_transaction.c:1040
#3 0x1c0564be in tsx_set_state (tsx=0x7c12a864, state=PJSIP_TSX_STATE_DESTROYED, event_src_type=PJSIP_EVENT_TIMER, event_src=0x7c12a974)
at ../src/pjsip/sip_transaction.c:1204
#4 0x1c05656b in tsx_on_state_terminated (tsx=0x7c12a864, event=0x7c11eed4) at ../src/pjsip/sip_transaction.c:3228
#5 0x1c055f6c in tsx_timer_callback (theap=0x7c06d1f8, entry=0x7c12a974) at ../src/pjsip/sip_transaction.c:1107
#6 0x1c0ccc7f in pj_timer_heap_poll (ht=0x7c06d1f8, next_delay=0x7c11ef70) at ../src/pj/timer.c:518
#7 0x1c045d02 in pjsip_endpt_handle_events2 (endpt=0x7c06d064, max_timeout=0x7c11efa4, p_count=0x7c11efac) at ../src/pjsip/sip_endpoint.c:708
#8 0x1c01aa1e in pjsua_handle_events (msec_timeout=10) at ../src/pjsua-lib/pjsua_core.c:1550
#9 0x1c01aa84 in worker_thread (arg=0x0) at ../src/pjsua-lib/pjsua_core.c:571
#10 0x1c0bf5d7 in thread_main (param=0x7c0dbfc0) at ../src/pj/os_core_unix.c:512
#11 0x03a09c2e in _rthread_start (v=0x7c086600) at /usr/src/lib/librthread/rthread.c:113
#12 0x0f138313 in __tfork_thread () from /usr/lib/libc.so.64.0
- David
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