SIGTHR
[SIGTHR] = "SIGTHR",
#define SIGCANCEL SIGTHR
if (td->td_proc->p_leader != NULL && signum >= SIGTHR &&
signum < SIGTHR + 4 && td->td_proc->p_leader == p->p_leader)
#define RCTL_ACTION_SIGTHR SIGTHR
#define SIGLWP SIGTHR