#0  0x005baae2 in __ast_pthread_mutex_trylock (filename=0x60de44 "chan_sip.c", lineno=15677, func=0x61a8a9 "do_monitor", mutex_name=0x61a8d5 "&sip->lock",
    t=0x11) at /usr/src/updates/SMR.1.3.831/updates/applications/asterisk-1.4.18-patched/include/asterisk/lock.h:390
390             int canlog = strcmp(filename, "logger.c") & t->track;
(gdb) bt
#0  0x005baae2 in __ast_pthread_mutex_trylock (filename=0x60de44 "chan_sip.c", lineno=15677, func=0x61a8a9 "do_monitor", mutex_name=0x61a8d5 "&sip->lock",
    t=0x11) at /usr/src/updates/SMR.1.3.831/updates/applications/asterisk-1.4.18-patched/include/asterisk/lock.h:390
#1  0x005ffcba in do_monitor (data=0x0) at chan_sip.c:15677
#2  0x081118f3 in dummy_start (data=0x9b40940) at utils.c:852
#3  0x003c23cc in start_thread () from /lib/tls/libpthread.so.0
#4  0x007cac3e in clone () from /lib/tls/libc.so.6
(gdb) bt full
#0  0x005baae2 in __ast_pthread_mutex_trylock (filename=0x60de44 "chan_sip.c", lineno=15677, func=0x61a8a9 "do_monitor", mutex_name=0x61a8d5 "&sip->lock",
    t=0x11) at /usr/src/updates/SMR.1.3.831/updates/applications/asterisk-1.4.18-patched/include/asterisk/lock.h:390
        res = 16
        canlog = 0
        __PRETTY_FUNCTION__ = "__ast_pthread_mutex_trylock"
#1  0x005ffcba in do_monitor (data=0x0) at chan_sip.c:15677
        res = 1
        sip = (struct sip_pvt *) 0x11
        peer = (struct sip_peer *) 0x0
        t = 1260535381
        fastrestart = 0
        lastpeernum = -1
        curpeernum = 129
        reloading = 0
        __PRETTY_FUNCTION__ = "do_monitor"
#2  0x081118f3 in dummy_start (data=0x9b40940) at utils.c:852
        _buffer = {__routine = 0x806a159 <ast_unregister_thread>, __arg = 0x53bba0, __canceltype = 0, __prev = 0x0}
        ret = (void *) 0x0
        a = {start_routine = 0x5ffa57 <do_monitor>, data = 0x0,
  name = 0x9b40950 "do_monitor", ' ' <repeats 11 times>, "started at [15811] chan_sip.c restart_monitor()"}
        lock_info = (struct thr_lock_info *) 0x9bae988
        mutex_attr = {__mutexkind = 1}
#3  0x003c23cc in start_thread () from /lib/tls/libpthread.so.0
No symbol table info available.
#4  0x007cac3e in clone () from /lib/tls/libc.so.6
No symbol table info available.