SIGNAL_DEBUG_THREAD
send_signal_to_thread_locked(thread, SIGNAL_DEBUG_THREAD, NULL, 0);
case SIGNAL_DEBUG_THREAD:
case SIGNAL_DEBUG_THREAD:
| SIGNAL_TO_MASK(SIGNAL_DEBUG_THREAD) \
| SIGNAL_TO_MASK(SIGNAL_DEBUG_THREAD))
| SIGNAL_TO_MASK(SIGNAL_DEBUG_THREAD) \