TDF_EXITING
if (current->dfly_td->td_flags & TDF_EXITING) {
(current->dfly_td->td_flags & TDF_EXITING) && fatal_signal_pending(current)) {
TDF_EXITING)) != TDF_EXITING) {
TDF_EXITING)) == TDF_EXITING);
lp->lwp_thread->td_flags |= TDF_EXITING;
exiting = otd->td_flags & TDF_EXITING;
curthread->td_flags |= TDF_EXITING;
curthread->td_flags |= TDF_EXITING;