.
Thread 2 (process 1719):
#0  0x00007f320d58b373 in *__GI___poll (fds=<value optimized out>, 
    nfds=<value optimized out>, timeout=-1)
    at ../sysdeps/unix/sysv/linux/poll.c:87
	resultvar = <value optimized out>
	_a3 = -1
	_a2 = 2
	_a1 = 139852826083088
	oldtype = 0
	result = <value optimized out>
#1  0x00007f3206339e9b in task_monitor_alsa (data=0xca5870)
    at gstalsamixer.c:443
	nfds = 1
	rnfds = 1
	revents = 0
	__PRETTY_FUNCTION__ = "task_monitor_alsa"
#2  0x00007f320e300417 in gst_task_func (task=0xc95120) at gsttask.c:234
	lock = (GStaticRecMutex *) 0xc961f0
	tself = (GThread *) 0xca9940
	priv = (GstTaskPrivate *) 0xc951c0
	__PRETTY_FUNCTION__ = "gst_task_func"
#3  0x00007f320ec30132 in ?? () from /lib/libglib-2.0.so.0
No symbol table info available.
#4  0x00007f320ec2eb34 in ?? () from /lib/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f320e7a5a04 in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#6  0x00007f320d5977bd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#7  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (process 1680):
#0  0x0000000000402f2d in xvd_calculate_avg_volume ()
No symbol table info available.
#1  0x00000000004031bb in xvd_mixer_init_volume ()
No symbol table info available.
#2  0x000000000040280b in main ()
No symbol table info available.