bsd/kern/kern_exit.c

156 static int reap_child_locked(proc_t parent, proc_t child, int deadparent, int reparentedtoinit, int locked, int droplock);
242  * to zombie, and unlink proc from allproc and parent's lists.  Save exit
420 	 * If parent is waiting for us to exit or exec,
421 	 * P_LPPWAIT is set; we will wakeup the parent below.
659 				panic("parent child linkage broken");
805 	 * Notify parent that we're gone.
812 		 * If the parent is ignoring SIGCHLD, then POSIX requires
813 		 * us to not add the resource usage to the parent process -
820 		 * Add child resource usage to parent before giving
851 		 * no one except parent (reaping ) can look at this.
852 		 * The write is to an int and is coherent. Also parent is
866 		/* and now wakeup the parent */
871 		/* should be fine as parent proc would be initproc */
874 		 * no one except parent (reaping ) can look at this.
875 		 * The write is to an int and is coherent. Also parent is
923  *		parent, else recover all resources remaining associated
926  * Parameters:	proc_t parent		Parent of process being reaped
934 reap_child_locked(proc_t parent, proc_t child, int deadparent, int reparentedtoinit, int locked, int droplock)
936 	proc_t trace_parent = PROC_NULL;	/* Traced parent process, if tracing */
943 	 * we need to give it back to the old parent.
979 			/* resend knote to original parent (and others) after reparenting */
995 		 * If we can't reparent (e.g. the original parent exited while child was being debugged, or
996 		 * original parent is the same as the debugger currently exiting), we still need to satisfy
1012 		proc_lock(parent);
1015 		 * If the parent is ignoring SIGCHLD, then POSIX requires
1016 		 * us to not add the resource usage to the parent process -
1021 		if (!(parent->p_flag & P_NOCLDWAIT))
1023 			ruadd(&parent->p_stats->p_cru, child->p_ru);
1024 		proc_unlock(parent);
1064 	parent->p_childrencnt--;
1066 	/* If there are no more children wakeup parent */
1067 	if ((deadparent != 0) && (LIST_EMPTY(&parent->p_children)))
1068 		wakeup((caddr_t)parent);	/* with list lock held */
1556  * make process 'parent' the new parent of process 'child'.
1559 proc_reparentlocked(proc_t child, proc_t parent, int cansignal, int locked)
1563 	if (child->p_pptr == parent)
1572 		panic("proc_reparent: process %p does not have a parent\n", child);
1585 	LIST_INSERT_HEAD(&parent->p_children, child, p_sibling);
1586 	parent->p_childrencnt++;
1587 	child->p_pptr = parent;
1588 	child->p_ppid = parent->p_pid;
1592 	if ((cansignal != 0) && (initproc == parent) && (child->p_stat == SZOMB))
1600  * to zombie, and unlink proc from allproc and parent's lists.  Save exit
1631 	 	* This happens when a parent exits/killed and vfork is in progress
1642 		 * parent of a vfork child has already called exit() and the
1797 				panic("parent child linkage broken");
1941 	 * Notify parent that we're gone.
1960 		 * no one except parent (reaping ) can look at this.
1961 		 * The write is to an int and is coherent. Also parent is
1968 		/* and now wakeup the parent */