1.c

	/*
	 * If we're being traced (possibly because someone attached us
	 * while we were stopped), check for a signal from the debugger.
	 */
	if (sig_proc->p_stat == SSTOP) {
		if ((sig_proc->p_lflag & P_LTRACED) != 0 && sig_proc->p_xstat != 0)
			uth->uu_siglist |= sigmask(sig_proc->p_xstat); 
		if ((flavor & PSIG_VFORK) != 0) {
			sig_proc->p_stat = SRUN;
		}
		proc_unlock(sig_proc);	
	} else {
		/*
	 	 * setrunnable(p) in BSD and
	 	 * Wake up the thread if it is interruptible.
	 	 */
		sig_proc->p_stat = SRUN;
		proc_unlock(sig_proc);	
		if ((flavor & PSIG_VFORK) == 0)
			thread_abort_safely(sig_thread);
	}