signal_is_blocked
!signal_is_blocked(t, sig) && /* and signal not blocked */
if (!signal_is_blocked(t, sig)) {
(sigismember(&(p)->p_ignore, sig) || signal_is_blocked((t), sig))
if (signal_is_blocked(curthread, SIGTRAP) ||
extern int signal_is_blocked(kthread_t *, int);