1^getpid .*(__kernel_vsyscall )?(__)?getpid ns::f3\(int\) ns::f2\(int\) ns::f1\(int\) ns::f0\(int\) main 2^SIGURG .*(__kernel_vsyscall )?(__)?kill ns::f3\(int\) ns::f2\(int\) ns::f1\(int\) ns::f0\(int\) main 3