gdb) thread apply all bt

Thread 1 (Thread 0x7f5e50a7b840 (LWP 30609)):
#0  0x00007f5e4f490810 in __read_nocancel () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f5e5084520c in ?? ()
#2  0x00007f5e5082dba9 in ?? ()
#3  0x00007f5e50822f65 in ?? ()
#4  0x00007f5e50824a89 in ?? ()
#5  0x00007f5e508183b6 in ?? ()
#6  0x00007f5e4f3c6ec5 in __libc_start_main (main=0x7f5e50816b40, argc=11, argv=0x7ffdc6fd56e8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffdc6fd56d8)
    at libc-start.c:287
#7  0x00007f5e5081959d in ?? ()