[yz@localhost src]$ gcc sigwait_demo.c -g -o sigwait_demo
[yz@localhost src]$ gdb sigwait_demo
GNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-110.el7
...
(gdb) r
Starting program: sigwait_demo 
^CSIGINT arrived. Exit now.
[Inferior 1 (process 8016) exited normally]
(gdb)