NOTE_TRACK
if (__predict_false(kn->kn_sfflags & NOTE_TRACK)) {
EV_SET(&ke, (uintptr_t)pid, EVFILT_PROC, EV_ADD, NOTE_FORK|NOTE_TRACK,
EV_SET(&ke, (uintptr_t)getpid(), EVFILT_PROC, EV_ADD, NOTE_TRACK, 0, 0);
NOTE_TRACK | NOTE_EXIT, 0, 0);