(gdb) bt full
#0  pthread_spin_lock () at ../sysdeps/x86_64/nptl/pthread_spin_lock.S:22
No locals.
#1  0x00007ffff7fbeecd in timer_thread (arg=0x0) at /opt/accel-ppp/accel-pppd/triton/timer.c:93
        i = 0
        n = 1
        r = 0
        t = 0x7fffdc3480a8
        set = {__val = {18446744067266838271, 18446744073709551615 <repeats 15 times>}}
#2  0x00007ffff7f99609 in start_thread (arg=<optimized out>) at pthread_create.c:477
        ret = <optimized out>
        pd = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140737309075200, -1330821316069101965, 140737488347102, 140737488347103, 140737488347104,
                140737309073024, 1330835340275936883, 1330838855431810675}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {
              prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#3  0x00007ffff7ae4293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
No locals.