(gdb) bt full
#0  peer_hash_cb (obj=0xbf1ff884, flags=8) at strings.h:279
No locals.
#1  0x08070455 in ao2_callback (c=0x81cffd0, flags=OBJ_POINTER, cb_fn=0xb77d9750 <peer_cmp_cb>, arg=0xbf1ff884) at astobj2.c:421
        i = 145
        last = -1216431308
        ret = (void *) 0x0
#2  0x08070dd6 in ao2_find (c=0xbf1ff884, arg=0xbf1ff884, flags=3206543492) at astobj2.c:493
No locals.
#3  0xb77c763d in iax2_devicestate (data=0xbf1ff85c) at chan_iax2.c:1108
        pds = {username = 0x0, password = 0x0, key = 0x0, peer = 0xbf1ff85c "ftloffice", port = 0x0, exten = 0x0, context = 0x0, options = 0x0}
        res = 4
#4  0x08092b42 in ast_device_state (device=0x8259fac "IAX2/ftloffice") at devicestate.c:170
        buf = 0xbf1ff9e5 "ftloffice"
        number = 0xbf1ff9e5 "ftloffice"
        chan_tech = (const struct ast_channel_tech *) 0xbf1ff884
        res = -1088423804
        tech = 0xbf1ff9e0 "IAX2"
        provider = 0xbf1ff9e0 "IAX2"
#5  0x08093578 in do_devstate_changes (data=0x0) at devicestate.c:285
        cur = (struct state_change *) 0x8259fa8
#6  0x080f6118 in dummy_start (data=0xbf1ff884) at utils.c:775
        _buffer = {__routine = 0x8067ef0 <ast_unregister_thread>, __arg = 0xc003, __canceltype = -1088423188, __prev = 0x0}
        ret = (void *) 0x817c270
        a = {start_routine = 0x8093500 <do_devstate_changes>, data = 0x0,
  name = 0x817c270 "do_devstate_changes  started at [  378] devicestate.c ast_device_state_engine_init()"}
#7  0xb7f0e1ee in pthread_start_thread () from /lib/libpthread.so.0
No symbol table info available.
#8  0xb7d52bea in clone () from /lib/libc.so.6
No symbol table info available.
(gdb)