xref: /onnv-gate/usr/src/uts/common/os/exit.c (revision 3813)
10Sstevel@tonic-gate /*
20Sstevel@tonic-gate  * CDDL HEADER START
30Sstevel@tonic-gate  *
40Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
52267Sdp  * Common Development and Distribution License (the "License").
62267Sdp  * You may not use this file except in compliance with the License.
70Sstevel@tonic-gate  *
80Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
90Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
100Sstevel@tonic-gate  * See the License for the specific language governing permissions
110Sstevel@tonic-gate  * and limitations under the License.
120Sstevel@tonic-gate  *
130Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
140Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
150Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
160Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
170Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
180Sstevel@tonic-gate  *
190Sstevel@tonic-gate  * CDDL HEADER END
200Sstevel@tonic-gate  */
21390Sraf 
220Sstevel@tonic-gate /*
23*3813Sdp  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
240Sstevel@tonic-gate  * Use is subject to license terms.
250Sstevel@tonic-gate  */
260Sstevel@tonic-gate 
270Sstevel@tonic-gate /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
280Sstevel@tonic-gate 
290Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"	/* from SVr4.0 1.74 */
300Sstevel@tonic-gate 
310Sstevel@tonic-gate #include <sys/types.h>
320Sstevel@tonic-gate #include <sys/param.h>
330Sstevel@tonic-gate #include <sys/sysmacros.h>
340Sstevel@tonic-gate #include <sys/systm.h>
350Sstevel@tonic-gate #include <sys/cred.h>
360Sstevel@tonic-gate #include <sys/user.h>
370Sstevel@tonic-gate #include <sys/errno.h>
380Sstevel@tonic-gate #include <sys/proc.h>
390Sstevel@tonic-gate #include <sys/ucontext.h>
400Sstevel@tonic-gate #include <sys/procfs.h>
410Sstevel@tonic-gate #include <sys/vnode.h>
420Sstevel@tonic-gate #include <sys/acct.h>
430Sstevel@tonic-gate #include <sys/var.h>
440Sstevel@tonic-gate #include <sys/cmn_err.h>
450Sstevel@tonic-gate #include <sys/debug.h>
460Sstevel@tonic-gate #include <sys/wait.h>
470Sstevel@tonic-gate #include <sys/siginfo.h>
480Sstevel@tonic-gate #include <sys/procset.h>
490Sstevel@tonic-gate #include <sys/class.h>
500Sstevel@tonic-gate #include <sys/file.h>
510Sstevel@tonic-gate #include <sys/session.h>
520Sstevel@tonic-gate #include <sys/kmem.h>
530Sstevel@tonic-gate #include <sys/vtrace.h>
540Sstevel@tonic-gate #include <sys/prsystm.h>
550Sstevel@tonic-gate #include <sys/ipc.h>
560Sstevel@tonic-gate #include <sys/sem_impl.h>
570Sstevel@tonic-gate #include <c2/audit.h>
580Sstevel@tonic-gate #include <sys/aio_impl.h>
590Sstevel@tonic-gate #include <vm/as.h>
600Sstevel@tonic-gate #include <sys/poll.h>
610Sstevel@tonic-gate #include <sys/door.h>
620Sstevel@tonic-gate #include <sys/lwpchan_impl.h>
630Sstevel@tonic-gate #include <sys/utrap.h>
640Sstevel@tonic-gate #include <sys/task.h>
650Sstevel@tonic-gate #include <sys/exacct.h>
660Sstevel@tonic-gate #include <sys/cyclic.h>
670Sstevel@tonic-gate #include <sys/schedctl.h>
680Sstevel@tonic-gate #include <sys/rctl.h>
690Sstevel@tonic-gate #include <sys/contract_impl.h>
700Sstevel@tonic-gate #include <sys/contract/process_impl.h>
710Sstevel@tonic-gate #include <sys/list.h>
720Sstevel@tonic-gate #include <sys/dtrace.h>
730Sstevel@tonic-gate #include <sys/pool.h>
740Sstevel@tonic-gate #include <sys/sdt.h>
750Sstevel@tonic-gate #include <sys/corectl.h>
762712Snn35248 #include <sys/brand.h>
773086Sraf #include <sys/libc_kernel.h>
780Sstevel@tonic-gate 
790Sstevel@tonic-gate /*
800Sstevel@tonic-gate  * convert code/data pair into old style wait status
810Sstevel@tonic-gate  */
820Sstevel@tonic-gate int
830Sstevel@tonic-gate wstat(int code, int data)
840Sstevel@tonic-gate {
850Sstevel@tonic-gate 	int stat = (data & 0377);
860Sstevel@tonic-gate 
870Sstevel@tonic-gate 	switch (code) {
880Sstevel@tonic-gate 	case CLD_EXITED:
890Sstevel@tonic-gate 		stat <<= 8;
900Sstevel@tonic-gate 		break;
910Sstevel@tonic-gate 	case CLD_DUMPED:
920Sstevel@tonic-gate 		stat |= WCOREFLG;
930Sstevel@tonic-gate 		break;
940Sstevel@tonic-gate 	case CLD_KILLED:
950Sstevel@tonic-gate 		break;
960Sstevel@tonic-gate 	case CLD_TRAPPED:
970Sstevel@tonic-gate 	case CLD_STOPPED:
980Sstevel@tonic-gate 		stat <<= 8;
990Sstevel@tonic-gate 		stat |= WSTOPFLG;
1000Sstevel@tonic-gate 		break;
1010Sstevel@tonic-gate 	case CLD_CONTINUED:
1020Sstevel@tonic-gate 		stat = WCONTFLG;
1030Sstevel@tonic-gate 		break;
1040Sstevel@tonic-gate 	default:
1050Sstevel@tonic-gate 		cmn_err(CE_PANIC, "wstat: bad code");
1060Sstevel@tonic-gate 		/* NOTREACHED */
1070Sstevel@tonic-gate 	}
1080Sstevel@tonic-gate 	return (stat);
1090Sstevel@tonic-gate }
1100Sstevel@tonic-gate 
1110Sstevel@tonic-gate static char *
1120Sstevel@tonic-gate exit_reason(char *buf, size_t bufsz, int what, int why)
1130Sstevel@tonic-gate {
1140Sstevel@tonic-gate 	switch (why) {
1150Sstevel@tonic-gate 	case CLD_EXITED:
1160Sstevel@tonic-gate 		(void) snprintf(buf, bufsz, "exited with status %d", what);
1170Sstevel@tonic-gate 		break;
1180Sstevel@tonic-gate 	case CLD_KILLED:
1190Sstevel@tonic-gate 		(void) snprintf(buf, bufsz, "exited on fatal signal %d", what);
1200Sstevel@tonic-gate 		break;
1210Sstevel@tonic-gate 	case CLD_DUMPED:
1220Sstevel@tonic-gate 		(void) snprintf(buf, bufsz, "core dumped on signal %d", what);
1230Sstevel@tonic-gate 		break;
1240Sstevel@tonic-gate 	default:
1250Sstevel@tonic-gate 		(void) snprintf(buf, bufsz, "encountered unknown error "
1260Sstevel@tonic-gate 		    "(%d, %d)", why, what);
1270Sstevel@tonic-gate 		break;
1280Sstevel@tonic-gate 	}
1290Sstevel@tonic-gate 
1300Sstevel@tonic-gate 	return (buf);
1310Sstevel@tonic-gate }
1320Sstevel@tonic-gate 
1330Sstevel@tonic-gate /*
1340Sstevel@tonic-gate  * exit system call: pass back caller's arg.
1350Sstevel@tonic-gate  */
1360Sstevel@tonic-gate void
1370Sstevel@tonic-gate rexit(int rval)
1380Sstevel@tonic-gate {
1390Sstevel@tonic-gate 	exit(CLD_EXITED, rval);
1400Sstevel@tonic-gate }
1410Sstevel@tonic-gate 
1420Sstevel@tonic-gate /*
1430Sstevel@tonic-gate  * Called by proc_exit() when a zone's init exits, presumably because
1440Sstevel@tonic-gate  * it failed.  As long as the given zone is still in the "running"
1450Sstevel@tonic-gate  * state, we will re-exec() init, but first we need to reset things
1460Sstevel@tonic-gate  * which are usually inherited across exec() but will break init's
1470Sstevel@tonic-gate  * assumption that it is being exec()'d from a virgin process.  Most
1480Sstevel@tonic-gate  * importantly this includes closing all file descriptors (exec only
1490Sstevel@tonic-gate  * closes those marked close-on-exec) and resetting signals (exec only
1500Sstevel@tonic-gate  * resets handled signals, and we need to clear any signals which
1510Sstevel@tonic-gate  * killed init).  Anything else that exec(2) says would be inherited,
1520Sstevel@tonic-gate  * but would affect the execution of init, needs to be reset.
1530Sstevel@tonic-gate  */
1540Sstevel@tonic-gate static int
1550Sstevel@tonic-gate restart_init(int what, int why)
1560Sstevel@tonic-gate {
1570Sstevel@tonic-gate 	kthread_t *t = curthread;
1580Sstevel@tonic-gate 	klwp_t *lwp = ttolwp(t);
1590Sstevel@tonic-gate 	proc_t *p = ttoproc(t);
1600Sstevel@tonic-gate 	user_t *up = PTOU(p);
1610Sstevel@tonic-gate 
1620Sstevel@tonic-gate 	vnode_t *oldcd, *oldrd;
1630Sstevel@tonic-gate 	int i, err;
1640Sstevel@tonic-gate 	char reason_buf[64];
1650Sstevel@tonic-gate 
1660Sstevel@tonic-gate 	/*
1670Sstevel@tonic-gate 	 * Let zone admin (and global zone admin if this is for a non-global
1680Sstevel@tonic-gate 	 * zone) know that init has failed and will be restarted.
1690Sstevel@tonic-gate 	 */
1700Sstevel@tonic-gate 	zcmn_err(p->p_zone->zone_id, CE_WARN,
1710Sstevel@tonic-gate 	    "init(1M) %s: restarting automatically",
1720Sstevel@tonic-gate 	    exit_reason(reason_buf, sizeof (reason_buf), what, why));
1730Sstevel@tonic-gate 
1740Sstevel@tonic-gate 	if (!INGLOBALZONE(p)) {
1750Sstevel@tonic-gate 		cmn_err(CE_WARN, "init(1M) for zone %s (pid %d) %s: "
1760Sstevel@tonic-gate 		    "restarting automatically",
1770Sstevel@tonic-gate 		    p->p_zone->zone_name, p->p_pid, reason_buf);
1780Sstevel@tonic-gate 	}
1790Sstevel@tonic-gate 
1800Sstevel@tonic-gate 	/*
1810Sstevel@tonic-gate 	 * Remove any fpollinfo_t's for this (last) thread from our file
1820Sstevel@tonic-gate 	 * descriptors so closeall() can ASSERT() that they're all gone.
1830Sstevel@tonic-gate 	 * Then close all open file descriptors in the process.
1840Sstevel@tonic-gate 	 */
1850Sstevel@tonic-gate 	pollcleanup();
1860Sstevel@tonic-gate 	closeall(P_FINFO(p));
1870Sstevel@tonic-gate 
1880Sstevel@tonic-gate 	/*
1890Sstevel@tonic-gate 	 * Grab p_lock and begin clearing miscellaneous global process
1900Sstevel@tonic-gate 	 * state that needs to be reset before we exec the new init(1M).
1910Sstevel@tonic-gate 	 */
1920Sstevel@tonic-gate 
1930Sstevel@tonic-gate 	mutex_enter(&p->p_lock);
194390Sraf 	prbarrier(p);
1950Sstevel@tonic-gate 
196390Sraf 	p->p_flag &= ~(SKILLED | SEXTKILLED | SEXITING | SDOCORE);
1970Sstevel@tonic-gate 	up->u_cmask = CMASK;
1980Sstevel@tonic-gate 
1990Sstevel@tonic-gate 	sigemptyset(&t->t_hold);
2000Sstevel@tonic-gate 	sigemptyset(&t->t_sig);
2010Sstevel@tonic-gate 	sigemptyset(&t->t_extsig);
2020Sstevel@tonic-gate 
2030Sstevel@tonic-gate 	sigemptyset(&p->p_sig);
2040Sstevel@tonic-gate 	sigemptyset(&p->p_extsig);
2050Sstevel@tonic-gate 
2060Sstevel@tonic-gate 	sigdelq(p, t, 0);
2070Sstevel@tonic-gate 	sigdelq(p, NULL, 0);
2080Sstevel@tonic-gate 
2090Sstevel@tonic-gate 	if (p->p_killsqp) {
2100Sstevel@tonic-gate 		siginfofree(p->p_killsqp);
2110Sstevel@tonic-gate 		p->p_killsqp = NULL;
2120Sstevel@tonic-gate 	}
2130Sstevel@tonic-gate 
2140Sstevel@tonic-gate 	/*
2150Sstevel@tonic-gate 	 * Reset any signals that are ignored back to the default disposition.
2160Sstevel@tonic-gate 	 * Other u_signal members will be cleared when exec calls sigdefault().
2170Sstevel@tonic-gate 	 */
2180Sstevel@tonic-gate 	for (i = 1; i < NSIG; i++) {
2190Sstevel@tonic-gate 		if (up->u_signal[i - 1] == SIG_IGN) {
2200Sstevel@tonic-gate 			up->u_signal[i - 1] = SIG_DFL;
2210Sstevel@tonic-gate 			sigemptyset(&up->u_sigmask[i - 1]);
2220Sstevel@tonic-gate 		}
2230Sstevel@tonic-gate 	}
2240Sstevel@tonic-gate 
2250Sstevel@tonic-gate 	/*
2260Sstevel@tonic-gate 	 * Clear the current signal, any signal info associated with it, and
2270Sstevel@tonic-gate 	 * any signal information from contracts and/or contract templates.
2280Sstevel@tonic-gate 	 */
2290Sstevel@tonic-gate 	lwp->lwp_cursig = 0;
2300Sstevel@tonic-gate 	lwp->lwp_extsig = 0;
2310Sstevel@tonic-gate 	if (lwp->lwp_curinfo != NULL) {
2320Sstevel@tonic-gate 		siginfofree(lwp->lwp_curinfo);
2330Sstevel@tonic-gate 		lwp->lwp_curinfo = NULL;
2340Sstevel@tonic-gate 	}
2350Sstevel@tonic-gate 	lwp_ctmpl_clear(lwp);
2360Sstevel@tonic-gate 
2370Sstevel@tonic-gate 	/*
2380Sstevel@tonic-gate 	 * Reset both the process root directory and the current working
2390Sstevel@tonic-gate 	 * directory to the root of the zone just as we do during boot.
2400Sstevel@tonic-gate 	 */
2410Sstevel@tonic-gate 	VN_HOLD(p->p_zone->zone_rootvp);
2420Sstevel@tonic-gate 	oldrd = up->u_rdir;
2430Sstevel@tonic-gate 	up->u_rdir = p->p_zone->zone_rootvp;
2440Sstevel@tonic-gate 
2450Sstevel@tonic-gate 	VN_HOLD(p->p_zone->zone_rootvp);
2460Sstevel@tonic-gate 	oldcd = up->u_cdir;
2470Sstevel@tonic-gate 	up->u_cdir = p->p_zone->zone_rootvp;
2480Sstevel@tonic-gate 
2490Sstevel@tonic-gate 	if (up->u_cwd != NULL) {
2500Sstevel@tonic-gate 		refstr_rele(up->u_cwd);
2510Sstevel@tonic-gate 		up->u_cwd = NULL;
2520Sstevel@tonic-gate 	}
2530Sstevel@tonic-gate 
2540Sstevel@tonic-gate 	mutex_exit(&p->p_lock);
2550Sstevel@tonic-gate 
2560Sstevel@tonic-gate 	if (oldrd != NULL)
2570Sstevel@tonic-gate 		VN_RELE(oldrd);
2580Sstevel@tonic-gate 	if (oldcd != NULL)
2590Sstevel@tonic-gate 		VN_RELE(oldcd);
2600Sstevel@tonic-gate 
2612712Snn35248 	/* Free the controlling tty.  (freectty() always assumes curproc.) */
2622712Snn35248 	ASSERT(p == curproc);
2632712Snn35248 	(void) freectty(B_TRUE);
2640Sstevel@tonic-gate 
2650Sstevel@tonic-gate 	/*
2660Sstevel@tonic-gate 	 * Now exec() the new init(1M) on top of the current process.  If we
2670Sstevel@tonic-gate 	 * succeed, the caller will treat this like a successful system call.
2680Sstevel@tonic-gate 	 * If we fail, we issue messages and the caller will proceed with exit.
2690Sstevel@tonic-gate 	 */
2702267Sdp 	err = exec_init(p->p_zone->zone_initname, NULL);
2710Sstevel@tonic-gate 
2720Sstevel@tonic-gate 	if (err == 0)
2730Sstevel@tonic-gate 		return (0);
2740Sstevel@tonic-gate 
2750Sstevel@tonic-gate 	zcmn_err(p->p_zone->zone_id, CE_WARN,
2760Sstevel@tonic-gate 	    "failed to restart init(1M) (err=%d): system reboot required", err);
2770Sstevel@tonic-gate 
2780Sstevel@tonic-gate 	if (!INGLOBALZONE(p)) {
2790Sstevel@tonic-gate 		cmn_err(CE_WARN, "failed to restart init(1M) for zone %s "
2800Sstevel@tonic-gate 		    "(pid %d, err=%d): zoneadm(1M) boot required",
2810Sstevel@tonic-gate 		    p->p_zone->zone_name, p->p_pid, err);
2820Sstevel@tonic-gate 	}
2830Sstevel@tonic-gate 
2840Sstevel@tonic-gate 	return (-1);
2850Sstevel@tonic-gate }
2860Sstevel@tonic-gate 
2870Sstevel@tonic-gate /*
2880Sstevel@tonic-gate  * Release resources.
2890Sstevel@tonic-gate  * Enter zombie state.
2900Sstevel@tonic-gate  * Wake up parent and init processes,
2910Sstevel@tonic-gate  * and dispose of children.
2920Sstevel@tonic-gate  */
2930Sstevel@tonic-gate void
2940Sstevel@tonic-gate exit(int why, int what)
2950Sstevel@tonic-gate {
2960Sstevel@tonic-gate 	/*
2970Sstevel@tonic-gate 	 * If proc_exit() fails, then some other lwp in the process
2980Sstevel@tonic-gate 	 * got there first.  We just have to call lwp_exit() to allow
2990Sstevel@tonic-gate 	 * the other lwp to finish exiting the process.  Otherwise we're
3000Sstevel@tonic-gate 	 * restarting init, and should return.
3010Sstevel@tonic-gate 	 */
3020Sstevel@tonic-gate 	if (proc_exit(why, what) != 0) {
3030Sstevel@tonic-gate 		mutex_enter(&curproc->p_lock);
3040Sstevel@tonic-gate 		ASSERT(curproc->p_flag & SEXITLWPS);
3050Sstevel@tonic-gate 		lwp_exit();
3060Sstevel@tonic-gate 		/* NOTREACHED */
3070Sstevel@tonic-gate 	}
3080Sstevel@tonic-gate }
3090Sstevel@tonic-gate 
3100Sstevel@tonic-gate /*
311390Sraf  * Set the SEXITING flag on the process, after making sure /proc does
312390Sraf  * not have it locked.  This is done in more places than proc_exit(),
313390Sraf  * so it is a separate function.
314390Sraf  */
315390Sraf void
316390Sraf proc_is_exiting(proc_t *p)
317390Sraf {
318390Sraf 	mutex_enter(&p->p_lock);
319390Sraf 	prbarrier(p);
320390Sraf 	p->p_flag |= SEXITING;
321390Sraf 	mutex_exit(&p->p_lock);
322390Sraf }
323390Sraf 
324390Sraf /*
3250Sstevel@tonic-gate  * Return value:
3260Sstevel@tonic-gate  *   1 - exitlwps() failed, call (or continue) lwp_exit()
3270Sstevel@tonic-gate  *   0 - restarting init.  Return through system call path
3280Sstevel@tonic-gate  */
3290Sstevel@tonic-gate int
3300Sstevel@tonic-gate proc_exit(int why, int what)
3310Sstevel@tonic-gate {
3320Sstevel@tonic-gate 	kthread_t *t = curthread;
3330Sstevel@tonic-gate 	klwp_t *lwp = ttolwp(t);
3340Sstevel@tonic-gate 	proc_t *p = ttoproc(t);
3350Sstevel@tonic-gate 	zone_t *z = p->p_zone;
3360Sstevel@tonic-gate 	timeout_id_t tmp_id;
3370Sstevel@tonic-gate 	int rv;
3380Sstevel@tonic-gate 	proc_t *q;
3390Sstevel@tonic-gate 	task_t *tk;
3400Sstevel@tonic-gate 	vnode_t *exec_vp, *execdir_vp, *cdir, *rdir;
3410Sstevel@tonic-gate 	sigqueue_t *sqp;
3420Sstevel@tonic-gate 	lwpdir_t *lwpdir;
3430Sstevel@tonic-gate 	uint_t lwpdir_sz;
3440Sstevel@tonic-gate 	lwpdir_t **tidhash;
3450Sstevel@tonic-gate 	uint_t tidhash_sz;
3460Sstevel@tonic-gate 	refstr_t *cwd;
3470Sstevel@tonic-gate 	hrtime_t hrutime, hrstime;
3483086Sraf 	int evaporate;
3490Sstevel@tonic-gate 
3500Sstevel@tonic-gate 	/*
3510Sstevel@tonic-gate 	 * Stop and discard the process's lwps except for the current one,
3520Sstevel@tonic-gate 	 * unless some other lwp beat us to it.  If exitlwps() fails then
3530Sstevel@tonic-gate 	 * return and the calling lwp will call (or continue in) lwp_exit().
3540Sstevel@tonic-gate 	 */
355390Sraf 	proc_is_exiting(p);
3560Sstevel@tonic-gate 	if (exitlwps(0) != 0)
3570Sstevel@tonic-gate 		return (1);
3580Sstevel@tonic-gate 
3590Sstevel@tonic-gate 	DTRACE_PROC(lwp__exit);
3600Sstevel@tonic-gate 	DTRACE_PROC1(exit, int, why);
3610Sstevel@tonic-gate 
3620Sstevel@tonic-gate 	/*
3632712Snn35248 	 * Will perform any brand specific proc exit processing, since this
3642712Snn35248 	 * is always the last lwp, will also perform lwp_exit and free brand
3652712Snn35248 	 * data
3662712Snn35248 	 */
3672712Snn35248 	if (PROC_IS_BRANDED(p))
3682712Snn35248 		BROP(p)->b_proc_exit(p, lwp);
3692712Snn35248 
3702712Snn35248 	/*
3712267Sdp 	 * Don't let init exit unless zone_start_init() failed its exec, or
3720Sstevel@tonic-gate 	 * we are shutting down the zone or the machine.
3730Sstevel@tonic-gate 	 *
3740Sstevel@tonic-gate 	 * Since we are single threaded, we don't need to lock the
3750Sstevel@tonic-gate 	 * following accesses to zone_proc_initpid.
3760Sstevel@tonic-gate 	 */
3770Sstevel@tonic-gate 	if (p->p_pid == z->zone_proc_initpid) {
3780Sstevel@tonic-gate 		if (z->zone_boot_err == 0 &&
3790Sstevel@tonic-gate 		    zone_status_get(z) < ZONE_IS_SHUTTING_DOWN &&
3800Sstevel@tonic-gate 		    zone_status_get(global_zone) < ZONE_IS_SHUTTING_DOWN &&
3812712Snn35248 		    z->zone_restart_init == B_TRUE &&
3820Sstevel@tonic-gate 		    restart_init(what, why) == 0)
3830Sstevel@tonic-gate 			return (0);
3840Sstevel@tonic-gate 		/*
3850Sstevel@tonic-gate 		 * Since we didn't or couldn't restart init, we clear
3860Sstevel@tonic-gate 		 * the zone's init state and proceed with exit
3870Sstevel@tonic-gate 		 * processing.
3880Sstevel@tonic-gate 		 */
3890Sstevel@tonic-gate 		z->zone_proc_initpid = -1;
3900Sstevel@tonic-gate 	}
3910Sstevel@tonic-gate 
3920Sstevel@tonic-gate 	/*
3930Sstevel@tonic-gate 	 * Allocate a sigqueue now, before we grab locks.
3940Sstevel@tonic-gate 	 * It will be given to sigcld(), below.
3953086Sraf 	 * Special case:  If we will be making the process disappear
3963086Sraf 	 * without a trace (for the benefit of posix_spawn() in libc)
3973086Sraf 	 * don't bother to allocate a useless sigqueue.
3980Sstevel@tonic-gate 	 */
3993086Sraf 	evaporate = ((p->p_flag & SVFORK) &&
4003086Sraf 	    why == CLD_EXITED && what == _EVAPORATE);
4013086Sraf 	if (!evaporate)
4023086Sraf 		sqp = kmem_zalloc(sizeof (sigqueue_t), KM_SLEEP);
4030Sstevel@tonic-gate 
4040Sstevel@tonic-gate 	/*
4050Sstevel@tonic-gate 	 * revoke any doors created by the process.
4060Sstevel@tonic-gate 	 */
4070Sstevel@tonic-gate 	if (p->p_door_list)
4080Sstevel@tonic-gate 		door_exit();
4090Sstevel@tonic-gate 
4100Sstevel@tonic-gate 	/*
4110Sstevel@tonic-gate 	 * Release schedctl data structures.
4120Sstevel@tonic-gate 	 */
4130Sstevel@tonic-gate 	if (p->p_pagep)
4140Sstevel@tonic-gate 		schedctl_proc_cleanup();
4150Sstevel@tonic-gate 
4160Sstevel@tonic-gate 	/*
4170Sstevel@tonic-gate 	 * make sure all pending kaio has completed.
4180Sstevel@tonic-gate 	 */
4190Sstevel@tonic-gate 	if (p->p_aio)
4200Sstevel@tonic-gate 		aio_cleanup_exit();
4210Sstevel@tonic-gate 
4220Sstevel@tonic-gate 	/*
4230Sstevel@tonic-gate 	 * discard the lwpchan cache.
4240Sstevel@tonic-gate 	 */
4250Sstevel@tonic-gate 	if (p->p_lcp != NULL)
4260Sstevel@tonic-gate 		lwpchan_destroy_cache(0);
4270Sstevel@tonic-gate 
4280Sstevel@tonic-gate 	/*
4290Sstevel@tonic-gate 	 * Clean up any DTrace helper actions or probes for the process.
4300Sstevel@tonic-gate 	 */
4310Sstevel@tonic-gate 	if (p->p_dtrace_helpers != NULL) {
4320Sstevel@tonic-gate 		ASSERT(dtrace_helpers_cleanup != NULL);
4330Sstevel@tonic-gate 		(*dtrace_helpers_cleanup)();
4340Sstevel@tonic-gate 	}
4350Sstevel@tonic-gate 
4360Sstevel@tonic-gate 	/* untimeout the realtime timers */
4370Sstevel@tonic-gate 	if (p->p_itimer != NULL)
4380Sstevel@tonic-gate 		timer_exit();
4390Sstevel@tonic-gate 
4400Sstevel@tonic-gate 	if ((tmp_id = p->p_alarmid) != 0) {
4410Sstevel@tonic-gate 		p->p_alarmid = 0;
4420Sstevel@tonic-gate 		(void) untimeout(tmp_id);
4430Sstevel@tonic-gate 	}
4440Sstevel@tonic-gate 
4450Sstevel@tonic-gate 	/*
4460Sstevel@tonic-gate 	 * Remove any fpollinfo_t's for this (last) thread from our file
4470Sstevel@tonic-gate 	 * descriptors so closeall() can ASSERT() that they're all gone.
4480Sstevel@tonic-gate 	 */
4490Sstevel@tonic-gate 	pollcleanup();
4500Sstevel@tonic-gate 
4510Sstevel@tonic-gate 	if (p->p_rprof_cyclic != CYCLIC_NONE) {
4520Sstevel@tonic-gate 		mutex_enter(&cpu_lock);
4530Sstevel@tonic-gate 		cyclic_remove(p->p_rprof_cyclic);
4540Sstevel@tonic-gate 		mutex_exit(&cpu_lock);
4550Sstevel@tonic-gate 	}
4560Sstevel@tonic-gate 
4570Sstevel@tonic-gate 	mutex_enter(&p->p_lock);
4580Sstevel@tonic-gate 
4590Sstevel@tonic-gate 	/*
4600Sstevel@tonic-gate 	 * Clean up any DTrace probes associated with this process.
4610Sstevel@tonic-gate 	 */
4620Sstevel@tonic-gate 	if (p->p_dtrace_probes) {
4630Sstevel@tonic-gate 		ASSERT(dtrace_fasttrap_exit_ptr != NULL);
4640Sstevel@tonic-gate 		dtrace_fasttrap_exit_ptr(p);
4650Sstevel@tonic-gate 	}
4660Sstevel@tonic-gate 
4670Sstevel@tonic-gate 	while ((tmp_id = p->p_itimerid) != 0) {
4680Sstevel@tonic-gate 		p->p_itimerid = 0;
4690Sstevel@tonic-gate 		mutex_exit(&p->p_lock);
4700Sstevel@tonic-gate 		(void) untimeout(tmp_id);
4710Sstevel@tonic-gate 		mutex_enter(&p->p_lock);
4720Sstevel@tonic-gate 	}
4730Sstevel@tonic-gate 
4740Sstevel@tonic-gate 	lwp_cleanup();
4750Sstevel@tonic-gate 
4760Sstevel@tonic-gate 	/*
4770Sstevel@tonic-gate 	 * We are about to exit; prevent our resource associations from
4780Sstevel@tonic-gate 	 * being changed.
4790Sstevel@tonic-gate 	 */
4800Sstevel@tonic-gate 	pool_barrier_enter();
4810Sstevel@tonic-gate 
4820Sstevel@tonic-gate 	/*
4830Sstevel@tonic-gate 	 * Block the process against /proc now that we have really
4840Sstevel@tonic-gate 	 * acquired p->p_lock (to manipulate p_tlist at least).
4850Sstevel@tonic-gate 	 */
4860Sstevel@tonic-gate 	prbarrier(p);
4870Sstevel@tonic-gate 
4880Sstevel@tonic-gate #ifdef	SUN_SRC_COMPAT
4890Sstevel@tonic-gate 	if (code == CLD_KILLED)
4900Sstevel@tonic-gate 		u.u_acflag |= AXSIG;
4910Sstevel@tonic-gate #endif
4920Sstevel@tonic-gate 	sigfillset(&p->p_ignore);
4930Sstevel@tonic-gate 	sigemptyset(&p->p_siginfo);
4940Sstevel@tonic-gate 	sigemptyset(&p->p_sig);
4950Sstevel@tonic-gate 	sigemptyset(&p->p_extsig);
4960Sstevel@tonic-gate 	sigemptyset(&t->t_sig);
4970Sstevel@tonic-gate 	sigemptyset(&t->t_extsig);
4980Sstevel@tonic-gate 	sigemptyset(&p->p_sigmask);
4990Sstevel@tonic-gate 	sigdelq(p, t, 0);
5000Sstevel@tonic-gate 	lwp->lwp_cursig = 0;
5010Sstevel@tonic-gate 	lwp->lwp_extsig = 0;
5020Sstevel@tonic-gate 	p->p_flag &= ~(SKILLED | SEXTKILLED);
5030Sstevel@tonic-gate 	if (lwp->lwp_curinfo) {
5040Sstevel@tonic-gate 		siginfofree(lwp->lwp_curinfo);
5050Sstevel@tonic-gate 		lwp->lwp_curinfo = NULL;
5060Sstevel@tonic-gate 	}
5070Sstevel@tonic-gate 
5080Sstevel@tonic-gate 	t->t_proc_flag |= TP_LWPEXIT;
5090Sstevel@tonic-gate 	ASSERT(p->p_lwpcnt == 1 && p->p_zombcnt == 0);
5100Sstevel@tonic-gate 	prlwpexit(t);		/* notify /proc */
5110Sstevel@tonic-gate 	lwp_hash_out(p, t->t_tid);
5120Sstevel@tonic-gate 	prexit(p);
5130Sstevel@tonic-gate 
5140Sstevel@tonic-gate 	p->p_lwpcnt = 0;
5150Sstevel@tonic-gate 	p->p_tlist = NULL;
5160Sstevel@tonic-gate 	sigqfree(p);
5170Sstevel@tonic-gate 	term_mstate(t);
5180Sstevel@tonic-gate 	p->p_mterm = gethrtime();
5190Sstevel@tonic-gate 
5200Sstevel@tonic-gate 	exec_vp = p->p_exec;
5210Sstevel@tonic-gate 	execdir_vp = p->p_execdir;
5220Sstevel@tonic-gate 	p->p_exec = NULLVP;
5230Sstevel@tonic-gate 	p->p_execdir = NULLVP;
5240Sstevel@tonic-gate 	mutex_exit(&p->p_lock);
5250Sstevel@tonic-gate 	if (exec_vp)
5260Sstevel@tonic-gate 		VN_RELE(exec_vp);
5270Sstevel@tonic-gate 	if (execdir_vp)
5280Sstevel@tonic-gate 		VN_RELE(execdir_vp);
5290Sstevel@tonic-gate 
5300Sstevel@tonic-gate 	pr_free_watched_pages(p);
5310Sstevel@tonic-gate 
5320Sstevel@tonic-gate 	closeall(P_FINFO(p));
5330Sstevel@tonic-gate 
5342712Snn35248 	/* Free the controlling tty.  (freectty() always assumes curproc.) */
5352712Snn35248 	ASSERT(p == curproc);
5362712Snn35248 	(void) freectty(B_TRUE);
5370Sstevel@tonic-gate 
5380Sstevel@tonic-gate #if defined(__sparc)
5390Sstevel@tonic-gate 	if (p->p_utraps != NULL)
5400Sstevel@tonic-gate 		utrap_free(p);
5410Sstevel@tonic-gate #endif
5420Sstevel@tonic-gate 	if (p->p_semacct)			/* IPC semaphore exit */
5430Sstevel@tonic-gate 		semexit(p);
5440Sstevel@tonic-gate 	rv = wstat(why, what);
5450Sstevel@tonic-gate 
5460Sstevel@tonic-gate 	acct(rv & 0xff);
5470Sstevel@tonic-gate 	exacct_commit_proc(p, rv);
5480Sstevel@tonic-gate 
5490Sstevel@tonic-gate 	/*
5500Sstevel@tonic-gate 	 * Release any resources associated with C2 auditing
5510Sstevel@tonic-gate 	 */
5520Sstevel@tonic-gate #ifdef C2_AUDIT
5530Sstevel@tonic-gate 	if (audit_active) {
5540Sstevel@tonic-gate 		/*
5550Sstevel@tonic-gate 		 * audit exit system call
5560Sstevel@tonic-gate 		 */
5570Sstevel@tonic-gate 		audit_exit(why, what);
5580Sstevel@tonic-gate 	}
5590Sstevel@tonic-gate #endif
5600Sstevel@tonic-gate 
5610Sstevel@tonic-gate 	/*
5620Sstevel@tonic-gate 	 * Free address space.
5630Sstevel@tonic-gate 	 */
5640Sstevel@tonic-gate 	relvm();
5650Sstevel@tonic-gate 
5660Sstevel@tonic-gate 	/*
5670Sstevel@tonic-gate 	 * Release held contracts.
5680Sstevel@tonic-gate 	 */
5690Sstevel@tonic-gate 	contract_exit(p);
5700Sstevel@tonic-gate 
5710Sstevel@tonic-gate 	/*
5720Sstevel@tonic-gate 	 * Depart our encapsulating process contract.
5730Sstevel@tonic-gate 	 */
5740Sstevel@tonic-gate 	if ((p->p_flag & SSYS) == 0) {
5750Sstevel@tonic-gate 		ASSERT(p->p_ct_process);
5760Sstevel@tonic-gate 		contract_process_exit(p->p_ct_process, p, rv);
5770Sstevel@tonic-gate 	}
5780Sstevel@tonic-gate 
5790Sstevel@tonic-gate 	/*
5800Sstevel@tonic-gate 	 * Remove pool association, and block if requested by pool_do_bind.
5810Sstevel@tonic-gate 	 */
5820Sstevel@tonic-gate 	mutex_enter(&p->p_lock);
5830Sstevel@tonic-gate 	ASSERT(p->p_pool->pool_ref > 0);
5840Sstevel@tonic-gate 	atomic_add_32(&p->p_pool->pool_ref, -1);
5850Sstevel@tonic-gate 	p->p_pool = pool_default;
5860Sstevel@tonic-gate 	/*
5870Sstevel@tonic-gate 	 * Now that our address space has been freed and all other threads
5880Sstevel@tonic-gate 	 * in this process have exited, set the PEXITED pool flag.  This
5890Sstevel@tonic-gate 	 * tells the pools subsystems to ignore this process if it was
5900Sstevel@tonic-gate 	 * requested to rebind this process to a new pool.
5910Sstevel@tonic-gate 	 */
5920Sstevel@tonic-gate 	p->p_poolflag |= PEXITED;
5930Sstevel@tonic-gate 	pool_barrier_exit();
5940Sstevel@tonic-gate 	mutex_exit(&p->p_lock);
5950Sstevel@tonic-gate 
5960Sstevel@tonic-gate 	mutex_enter(&pidlock);
5970Sstevel@tonic-gate 
5980Sstevel@tonic-gate 	/*
5990Sstevel@tonic-gate 	 * Delete this process from the newstate list of its parent. We
6000Sstevel@tonic-gate 	 * will put it in the right place in the sigcld in the end.
6010Sstevel@tonic-gate 	 */
6020Sstevel@tonic-gate 	delete_ns(p->p_parent, p);
6030Sstevel@tonic-gate 
6040Sstevel@tonic-gate 	/*
6050Sstevel@tonic-gate 	 * Reassign the orphans to the next of kin.
6060Sstevel@tonic-gate 	 * Don't rearrange init's orphanage.
6070Sstevel@tonic-gate 	 */
6080Sstevel@tonic-gate 	if ((q = p->p_orphan) != NULL && p != proc_init) {
6090Sstevel@tonic-gate 
6100Sstevel@tonic-gate 		proc_t *nokp = p->p_nextofkin;
6110Sstevel@tonic-gate 
6120Sstevel@tonic-gate 		for (;;) {
6130Sstevel@tonic-gate 			q->p_nextofkin = nokp;
6140Sstevel@tonic-gate 			if (q->p_nextorph == NULL)
6150Sstevel@tonic-gate 				break;
6160Sstevel@tonic-gate 			q = q->p_nextorph;
6170Sstevel@tonic-gate 		}
6180Sstevel@tonic-gate 		q->p_nextorph = nokp->p_orphan;
6190Sstevel@tonic-gate 		nokp->p_orphan = p->p_orphan;
6200Sstevel@tonic-gate 		p->p_orphan = NULL;
6210Sstevel@tonic-gate 	}
6220Sstevel@tonic-gate 
6230Sstevel@tonic-gate 	/*
6240Sstevel@tonic-gate 	 * Reassign the children to init.
6250Sstevel@tonic-gate 	 * Don't try to assign init's children to init.
6260Sstevel@tonic-gate 	 */
6270Sstevel@tonic-gate 	if ((q = p->p_child) != NULL && p != proc_init) {
6280Sstevel@tonic-gate 		struct proc	*np;
6290Sstevel@tonic-gate 		struct proc	*initp = proc_init;
6300Sstevel@tonic-gate 		boolean_t	setzonetop = B_FALSE;
6310Sstevel@tonic-gate 
6320Sstevel@tonic-gate 		if (!INGLOBALZONE(curproc))
6330Sstevel@tonic-gate 			setzonetop = B_TRUE;
6340Sstevel@tonic-gate 
6350Sstevel@tonic-gate 		pgdetach(p);
6360Sstevel@tonic-gate 
6370Sstevel@tonic-gate 		do {
6380Sstevel@tonic-gate 			np = q->p_sibling;
6390Sstevel@tonic-gate 			/*
6400Sstevel@tonic-gate 			 * Delete it from its current parent new state
6410Sstevel@tonic-gate 			 * list and add it to init new state list
6420Sstevel@tonic-gate 			 */
6430Sstevel@tonic-gate 			delete_ns(q->p_parent, q);
6440Sstevel@tonic-gate 
6450Sstevel@tonic-gate 			q->p_ppid = 1;
6463235Sraf 			q->p_pidflag &= ~(CLDNOSIGCHLD | CLDWAITPID);
6470Sstevel@tonic-gate 			if (setzonetop) {
6480Sstevel@tonic-gate 				mutex_enter(&q->p_lock);
6490Sstevel@tonic-gate 				q->p_flag |= SZONETOP;
6500Sstevel@tonic-gate 				mutex_exit(&q->p_lock);
6510Sstevel@tonic-gate 			}
6520Sstevel@tonic-gate 			q->p_parent = initp;
6530Sstevel@tonic-gate 
6540Sstevel@tonic-gate 			/*
6550Sstevel@tonic-gate 			 * Since q will be the first child,
6560Sstevel@tonic-gate 			 * it will not have a previous sibling.
6570Sstevel@tonic-gate 			 */
6580Sstevel@tonic-gate 			q->p_psibling = NULL;
6590Sstevel@tonic-gate 			if (initp->p_child) {
6600Sstevel@tonic-gate 				initp->p_child->p_psibling = q;
6610Sstevel@tonic-gate 			}
6620Sstevel@tonic-gate 			q->p_sibling = initp->p_child;
6630Sstevel@tonic-gate 			initp->p_child = q;
6640Sstevel@tonic-gate 			if (q->p_proc_flag & P_PR_PTRACE) {
6650Sstevel@tonic-gate 				mutex_enter(&q->p_lock);
6660Sstevel@tonic-gate 				sigtoproc(q, NULL, SIGKILL);
6670Sstevel@tonic-gate 				mutex_exit(&q->p_lock);
6680Sstevel@tonic-gate 			}
6690Sstevel@tonic-gate 			/*
6700Sstevel@tonic-gate 			 * sigcld() will add the child to parents
6710Sstevel@tonic-gate 			 * newstate list.
6720Sstevel@tonic-gate 			 */
6730Sstevel@tonic-gate 			if (q->p_stat == SZOMB)
6740Sstevel@tonic-gate 				sigcld(q, NULL);
6750Sstevel@tonic-gate 		} while ((q = np) != NULL);
6760Sstevel@tonic-gate 
6770Sstevel@tonic-gate 		p->p_child = NULL;
6780Sstevel@tonic-gate 		ASSERT(p->p_child_ns == NULL);
6790Sstevel@tonic-gate 	}
6800Sstevel@tonic-gate 
6810Sstevel@tonic-gate 	TRACE_1(TR_FAC_PROC, TR_PROC_EXIT, "proc_exit: %p", p);
6820Sstevel@tonic-gate 
6830Sstevel@tonic-gate 	mutex_enter(&p->p_lock);
6840Sstevel@tonic-gate 	CL_EXIT(curthread); /* tell the scheduler that curthread is exiting */
6850Sstevel@tonic-gate 
6860Sstevel@tonic-gate 	hrutime = mstate_aggr_state(p, LMS_USER);
6870Sstevel@tonic-gate 	hrstime = mstate_aggr_state(p, LMS_SYSTEM);
6880Sstevel@tonic-gate 	p->p_utime = (clock_t)NSEC_TO_TICK(hrutime) + p->p_cutime;
6890Sstevel@tonic-gate 	p->p_stime = (clock_t)NSEC_TO_TICK(hrstime) + p->p_cstime;
6900Sstevel@tonic-gate 
6910Sstevel@tonic-gate 	p->p_acct[LMS_USER]	+= p->p_cacct[LMS_USER];
6920Sstevel@tonic-gate 	p->p_acct[LMS_SYSTEM]	+= p->p_cacct[LMS_SYSTEM];
6930Sstevel@tonic-gate 	p->p_acct[LMS_TRAP]	+= p->p_cacct[LMS_TRAP];
6940Sstevel@tonic-gate 	p->p_acct[LMS_TFAULT]	+= p->p_cacct[LMS_TFAULT];
6950Sstevel@tonic-gate 	p->p_acct[LMS_DFAULT]	+= p->p_cacct[LMS_DFAULT];
6960Sstevel@tonic-gate 	p->p_acct[LMS_KFAULT]	+= p->p_cacct[LMS_KFAULT];
6970Sstevel@tonic-gate 	p->p_acct[LMS_USER_LOCK] += p->p_cacct[LMS_USER_LOCK];
6980Sstevel@tonic-gate 	p->p_acct[LMS_SLEEP]	+= p->p_cacct[LMS_SLEEP];
6990Sstevel@tonic-gate 	p->p_acct[LMS_WAIT_CPU]	+= p->p_cacct[LMS_WAIT_CPU];
7000Sstevel@tonic-gate 	p->p_acct[LMS_STOPPED]	+= p->p_cacct[LMS_STOPPED];
7010Sstevel@tonic-gate 
7020Sstevel@tonic-gate 	p->p_ru.minflt	+= p->p_cru.minflt;
7030Sstevel@tonic-gate 	p->p_ru.majflt	+= p->p_cru.majflt;
7040Sstevel@tonic-gate 	p->p_ru.nswap	+= p->p_cru.nswap;
7050Sstevel@tonic-gate 	p->p_ru.inblock	+= p->p_cru.inblock;
7060Sstevel@tonic-gate 	p->p_ru.oublock	+= p->p_cru.oublock;
7070Sstevel@tonic-gate 	p->p_ru.msgsnd	+= p->p_cru.msgsnd;
7080Sstevel@tonic-gate 	p->p_ru.msgrcv	+= p->p_cru.msgrcv;
7090Sstevel@tonic-gate 	p->p_ru.nsignals += p->p_cru.nsignals;
7100Sstevel@tonic-gate 	p->p_ru.nvcsw	+= p->p_cru.nvcsw;
7110Sstevel@tonic-gate 	p->p_ru.nivcsw	+= p->p_cru.nivcsw;
7120Sstevel@tonic-gate 	p->p_ru.sysc	+= p->p_cru.sysc;
7130Sstevel@tonic-gate 	p->p_ru.ioch	+= p->p_cru.ioch;
7140Sstevel@tonic-gate 
7150Sstevel@tonic-gate 	p->p_stat = SZOMB;
7160Sstevel@tonic-gate 	p->p_proc_flag &= ~P_PR_PTRACE;
7170Sstevel@tonic-gate 	p->p_wdata = what;
7180Sstevel@tonic-gate 	p->p_wcode = (char)why;
7190Sstevel@tonic-gate 
7200Sstevel@tonic-gate 	cdir = PTOU(p)->u_cdir;
7210Sstevel@tonic-gate 	rdir = PTOU(p)->u_rdir;
7220Sstevel@tonic-gate 	cwd = PTOU(p)->u_cwd;
7230Sstevel@tonic-gate 
7240Sstevel@tonic-gate 	/*
7250Sstevel@tonic-gate 	 * Release resource controls, as they are no longer enforceable.
7260Sstevel@tonic-gate 	 */
7270Sstevel@tonic-gate 	rctl_set_free(p->p_rctls);
7280Sstevel@tonic-gate 
7290Sstevel@tonic-gate 	/*
7300Sstevel@tonic-gate 	 * Give up task and project memberships.  Decrement tk_nlwps counter
7310Sstevel@tonic-gate 	 * for our task.max-lwps resource control.  An extended accounting
7320Sstevel@tonic-gate 	 * record, if that facility is active, is scheduled to be written.
7330Sstevel@tonic-gate 	 * Zombie processes are false members of task0 for the remainder of
7340Sstevel@tonic-gate 	 * their lifetime; no accounting information is recorded for them.
7350Sstevel@tonic-gate 	 */
7360Sstevel@tonic-gate 	tk = p->p_task;
7370Sstevel@tonic-gate 
7380Sstevel@tonic-gate 	mutex_enter(&p->p_zone->zone_nlwps_lock);
7390Sstevel@tonic-gate 	tk->tk_nlwps--;
7400Sstevel@tonic-gate 	tk->tk_proj->kpj_nlwps--;
7410Sstevel@tonic-gate 	p->p_zone->zone_nlwps--;
7420Sstevel@tonic-gate 	mutex_exit(&p->p_zone->zone_nlwps_lock);
7430Sstevel@tonic-gate 	task_detach(p);
7440Sstevel@tonic-gate 	p->p_task = task0p;
7450Sstevel@tonic-gate 
7460Sstevel@tonic-gate 	/*
7470Sstevel@tonic-gate 	 * Clear the lwp directory and the lwpid hash table
7480Sstevel@tonic-gate 	 * now that /proc can't bother us any more.
7490Sstevel@tonic-gate 	 * We free the memory below, after dropping p->p_lock.
7500Sstevel@tonic-gate 	 */
7510Sstevel@tonic-gate 	lwpdir = p->p_lwpdir;
7520Sstevel@tonic-gate 	lwpdir_sz = p->p_lwpdir_sz;
7530Sstevel@tonic-gate 	tidhash = p->p_tidhash;
7540Sstevel@tonic-gate 	tidhash_sz = p->p_tidhash_sz;
7550Sstevel@tonic-gate 	p->p_lwpdir = NULL;
7560Sstevel@tonic-gate 	p->p_lwpfree = NULL;
7570Sstevel@tonic-gate 	p->p_lwpdir_sz = 0;
7580Sstevel@tonic-gate 	p->p_tidhash = NULL;
7590Sstevel@tonic-gate 	p->p_tidhash_sz = 0;
7600Sstevel@tonic-gate 
7610Sstevel@tonic-gate 	/*
7621217Srab 	 * If the process has context ops installed, call the exit routine
7631217Srab 	 * on behalf of this last remaining thread. Normally exitpctx() is
7641217Srab 	 * called during thread_exit() or lwp_exit(), but because this is the
7651217Srab 	 * last thread in the process, we must call it here. By the time
7661217Srab 	 * thread_exit() is called (below), the association with the relevant
7671217Srab 	 * process has been lost.
7681217Srab 	 *
7691217Srab 	 * We also free the context here.
7701217Srab 	 */
7711217Srab 	if (p->p_pctx) {
7721217Srab 		kpreempt_disable();
7731217Srab 		exitpctx(p);
7741217Srab 		kpreempt_enable();
7751217Srab 
7761217Srab 		freepctx(p, 0);
7771217Srab 	}
7781217Srab 
7791217Srab 	/*
780*3813Sdp 	 * curthread's proc pointer is changed to point to the 'sched'
781*3813Sdp 	 * process for the corresponding zone, except in the case when
782*3813Sdp 	 * the exiting process is in fact a zsched instance, in which
783*3813Sdp 	 * case the proc pointer is set to p0.  We do so, so that the
784*3813Sdp 	 * process still points at the right zone when we call the VN_RELE()
785*3813Sdp 	 * below.
786*3813Sdp 	 *
787*3813Sdp 	 * This is because curthread's original proc pointer can be freed as
788*3813Sdp 	 * soon as the child sends a SIGCLD to its parent.  We use zsched so
789*3813Sdp 	 * that for user processes, even in the final moments of death, the
790*3813Sdp 	 * process is still associated with its zone.
7910Sstevel@tonic-gate 	 */
792*3813Sdp 	if (p != t->t_procp->p_zone->zone_zsched)
793*3813Sdp 		t->t_procp = t->t_procp->p_zone->zone_zsched;
794*3813Sdp 	else
795*3813Sdp 		t->t_procp = &p0;
7960Sstevel@tonic-gate 
7970Sstevel@tonic-gate 	mutex_exit(&p->p_lock);
7983235Sraf 	if (!evaporate) {
7993235Sraf 		p->p_pidflag &= ~CLDPEND;
8003086Sraf 		sigcld(p, sqp);
8013235Sraf 	} else {
8023086Sraf 		/*
8033086Sraf 		 * Do what sigcld() would do if the disposition
8043086Sraf 		 * of the SIGCHLD signal were set to be ignored.
8053086Sraf 		 */
8063086Sraf 		cv_broadcast(&p->p_srwchan_cv);
8073086Sraf 		freeproc(p);
8083086Sraf 	}
8090Sstevel@tonic-gate 	mutex_exit(&pidlock);
8100Sstevel@tonic-gate 
8110Sstevel@tonic-gate 	/*
8120Sstevel@tonic-gate 	 * We don't release u_cdir and u_rdir until SZOMB is set.
8130Sstevel@tonic-gate 	 * This protects us against dofusers().
8140Sstevel@tonic-gate 	 */
8150Sstevel@tonic-gate 	VN_RELE(cdir);
8160Sstevel@tonic-gate 	if (rdir)
8170Sstevel@tonic-gate 		VN_RELE(rdir);
8180Sstevel@tonic-gate 	if (cwd)
8190Sstevel@tonic-gate 		refstr_rele(cwd);
8200Sstevel@tonic-gate 
821*3813Sdp 	/*
822*3813Sdp 	 * task_rele() may ultimately cause the zone to go away (or
823*3813Sdp 	 * may cause the last user process in a zone to go away, which
824*3813Sdp 	 * signals zsched to go away).  So prior to this call, we must
825*3813Sdp 	 * no longer point at zsched.
826*3813Sdp 	 */
827*3813Sdp 	t->t_procp = &p0;
828*3813Sdp 	task_rele(tk);
829*3813Sdp 
830*3813Sdp 	kmem_free(lwpdir, lwpdir_sz * sizeof (lwpdir_t));
831*3813Sdp 	kmem_free(tidhash, tidhash_sz * sizeof (lwpdir_t *));
832*3813Sdp 
8330Sstevel@tonic-gate 	lwp_pcb_exit();
8340Sstevel@tonic-gate 
8350Sstevel@tonic-gate 	thread_exit();
8360Sstevel@tonic-gate 	/* NOTREACHED */
8370Sstevel@tonic-gate }
8380Sstevel@tonic-gate 
8390Sstevel@tonic-gate /*
8400Sstevel@tonic-gate  * Format siginfo structure for wait system calls.
8410Sstevel@tonic-gate  */
8420Sstevel@tonic-gate void
8430Sstevel@tonic-gate winfo(proc_t *pp, k_siginfo_t *ip, int waitflag)
8440Sstevel@tonic-gate {
8450Sstevel@tonic-gate 	ASSERT(MUTEX_HELD(&pidlock));
8460Sstevel@tonic-gate 
8470Sstevel@tonic-gate 	bzero(ip, sizeof (k_siginfo_t));
8480Sstevel@tonic-gate 	ip->si_signo = SIGCLD;
8490Sstevel@tonic-gate 	ip->si_code = pp->p_wcode;
8500Sstevel@tonic-gate 	ip->si_pid = pp->p_pid;
8510Sstevel@tonic-gate 	ip->si_ctid = PRCTID(pp);
8520Sstevel@tonic-gate 	ip->si_zoneid = pp->p_zone->zone_id;
8530Sstevel@tonic-gate 	ip->si_status = pp->p_wdata;
8540Sstevel@tonic-gate 	ip->si_stime = pp->p_stime;
8550Sstevel@tonic-gate 	ip->si_utime = pp->p_utime;
8560Sstevel@tonic-gate 
8570Sstevel@tonic-gate 	if (waitflag) {
8580Sstevel@tonic-gate 		pp->p_wcode = 0;
8590Sstevel@tonic-gate 		pp->p_wdata = 0;
8600Sstevel@tonic-gate 		pp->p_pidflag &= ~CLDPEND;
8610Sstevel@tonic-gate 	}
8620Sstevel@tonic-gate }
8630Sstevel@tonic-gate 
8640Sstevel@tonic-gate /*
8650Sstevel@tonic-gate  * Wait system call.
8660Sstevel@tonic-gate  * Search for a terminated (zombie) child,
8670Sstevel@tonic-gate  * finally lay it to rest, and collect its status.
8680Sstevel@tonic-gate  * Look also for stopped children,
8690Sstevel@tonic-gate  * and pass back status from them.
8700Sstevel@tonic-gate  */
8710Sstevel@tonic-gate int
8720Sstevel@tonic-gate waitid(idtype_t idtype, id_t id, k_siginfo_t *ip, int options)
8730Sstevel@tonic-gate {
8740Sstevel@tonic-gate 	int found;
8750Sstevel@tonic-gate 	proc_t *cp, *pp;
8760Sstevel@tonic-gate 	int proc_gone;
8770Sstevel@tonic-gate 	int waitflag = !(options & WNOWAIT);
8780Sstevel@tonic-gate 
8790Sstevel@tonic-gate 	/*
8800Sstevel@tonic-gate 	 * Obsolete flag, defined here only for binary compatibility
8810Sstevel@tonic-gate 	 * with old statically linked executables.  Delete this when
8820Sstevel@tonic-gate 	 * we no longer care about these old and broken applications.
8830Sstevel@tonic-gate 	 */
8840Sstevel@tonic-gate #define	_WNOCHLD	0400
8850Sstevel@tonic-gate 	options &= ~_WNOCHLD;
8860Sstevel@tonic-gate 
8870Sstevel@tonic-gate 	if (options == 0 || (options & ~WOPTMASK))
8880Sstevel@tonic-gate 		return (EINVAL);
8890Sstevel@tonic-gate 
8900Sstevel@tonic-gate 	switch (idtype) {
8910Sstevel@tonic-gate 	case P_PID:
8920Sstevel@tonic-gate 	case P_PGID:
8930Sstevel@tonic-gate 		if (id < 0 || id >= maxpid)
8940Sstevel@tonic-gate 			return (EINVAL);
8950Sstevel@tonic-gate 		/* FALLTHROUGH */
8960Sstevel@tonic-gate 	case P_ALL:
8970Sstevel@tonic-gate 		break;
8980Sstevel@tonic-gate 	default:
8990Sstevel@tonic-gate 		return (EINVAL);
9000Sstevel@tonic-gate 	}
9010Sstevel@tonic-gate 
9020Sstevel@tonic-gate 	pp = ttoproc(curthread);
903749Ssusans 
9040Sstevel@tonic-gate 	/*
9050Sstevel@tonic-gate 	 * lock parent mutex so that sibling chain can be searched.
9060Sstevel@tonic-gate 	 */
9070Sstevel@tonic-gate 	mutex_enter(&pidlock);
908749Ssusans 
909749Ssusans 	/*
910749Ssusans 	 * if we are only looking for exited processes and child_ns list
911749Ssusans 	 * is empty no reason to look at all children.
912749Ssusans 	 */
913749Ssusans 	if (idtype == P_ALL &&
9143235Sraf 	    (options & ~WNOWAIT) == (WNOHANG | WEXITED) &&
9152267Sdp 	    pp->p_child_ns == NULL) {
916749Ssusans 		if (pp->p_child) {
917749Ssusans 			mutex_exit(&pidlock);
918749Ssusans 			bzero(ip, sizeof (k_siginfo_t));
919749Ssusans 			return (0);
920749Ssusans 		}
921749Ssusans 		mutex_exit(&pidlock);
922749Ssusans 		return (ECHILD);
923749Ssusans 	}
924749Ssusans 
9253235Sraf 	while (pp->p_child != NULL) {
9260Sstevel@tonic-gate 
9270Sstevel@tonic-gate 		proc_gone = 0;
9280Sstevel@tonic-gate 
9293235Sraf 		for (cp = pp->p_child_ns; cp != NULL; cp = cp->p_sibling_ns) {
9303235Sraf 			if (idtype != P_PID && (cp->p_pidflag & CLDWAITPID))
9313235Sraf 				continue;
9323235Sraf 			if (idtype == P_PID && id != cp->p_pid)
9330Sstevel@tonic-gate 				continue;
9343235Sraf 			if (idtype == P_PGID && id != cp->p_pgrp)
9350Sstevel@tonic-gate 				continue;
9360Sstevel@tonic-gate 
9373235Sraf 			switch (cp->p_wcode) {
9380Sstevel@tonic-gate 
9390Sstevel@tonic-gate 			case CLD_TRAPPED:
9400Sstevel@tonic-gate 			case CLD_STOPPED:
9410Sstevel@tonic-gate 			case CLD_CONTINUED:
9420Sstevel@tonic-gate 				cmn_err(CE_PANIC,
9430Sstevel@tonic-gate 				    "waitid: wrong state %d on the p_newstate"
9443235Sraf 				    " list", cp->p_wcode);
9450Sstevel@tonic-gate 				break;
9460Sstevel@tonic-gate 
9470Sstevel@tonic-gate 			case CLD_EXITED:
9480Sstevel@tonic-gate 			case CLD_DUMPED:
9490Sstevel@tonic-gate 			case CLD_KILLED:
9500Sstevel@tonic-gate 				if (!(options & WEXITED)) {
9510Sstevel@tonic-gate 					/*
9520Sstevel@tonic-gate 					 * Count how many are already gone
9530Sstevel@tonic-gate 					 * for good.
9540Sstevel@tonic-gate 					 */
9550Sstevel@tonic-gate 					proc_gone++;
9560Sstevel@tonic-gate 					break;
9570Sstevel@tonic-gate 				}
9580Sstevel@tonic-gate 				if (!waitflag) {
9593235Sraf 					winfo(cp, ip, 0);
9600Sstevel@tonic-gate 				} else {
9613235Sraf 					winfo(cp, ip, 1);
9623235Sraf 					freeproc(cp);
9630Sstevel@tonic-gate 				}
9640Sstevel@tonic-gate 				mutex_exit(&pidlock);
9650Sstevel@tonic-gate 				if (waitflag) {		/* accept SIGCLD */
9660Sstevel@tonic-gate 					sigcld_delete(ip);
9670Sstevel@tonic-gate 					sigcld_repost();
9680Sstevel@tonic-gate 				}
9690Sstevel@tonic-gate 				return (0);
9700Sstevel@tonic-gate 			}
9710Sstevel@tonic-gate 
9720Sstevel@tonic-gate 			if (idtype == P_PID)
9730Sstevel@tonic-gate 				break;
9740Sstevel@tonic-gate 		}
9750Sstevel@tonic-gate 
9760Sstevel@tonic-gate 		/*
9770Sstevel@tonic-gate 		 * Wow! None of the threads on the p_sibling_ns list were
9780Sstevel@tonic-gate 		 * interesting threads. Check all the kids!
9790Sstevel@tonic-gate 		 */
9800Sstevel@tonic-gate 		found = 0;
9813235Sraf 		for (cp = pp->p_child; cp != NULL; cp = cp->p_sibling) {
9823235Sraf 			if (idtype == P_PID && id != cp->p_pid)
9830Sstevel@tonic-gate 				continue;
9843235Sraf 			if (idtype == P_PGID && id != cp->p_pgrp)
9850Sstevel@tonic-gate 				continue;
9860Sstevel@tonic-gate 
9870Sstevel@tonic-gate 			switch (cp->p_wcode) {
9880Sstevel@tonic-gate 			case CLD_TRAPPED:
9890Sstevel@tonic-gate 				if (!(options & WTRAPPED))
9900Sstevel@tonic-gate 					break;
9910Sstevel@tonic-gate 				winfo(cp, ip, waitflag);
9920Sstevel@tonic-gate 				mutex_exit(&pidlock);
9930Sstevel@tonic-gate 				if (waitflag) {		/* accept SIGCLD */
9940Sstevel@tonic-gate 					sigcld_delete(ip);
9950Sstevel@tonic-gate 					sigcld_repost();
9960Sstevel@tonic-gate 				}
9970Sstevel@tonic-gate 				return (0);
9980Sstevel@tonic-gate 
9990Sstevel@tonic-gate 			case CLD_STOPPED:
10000Sstevel@tonic-gate 				if (!(options & WSTOPPED))
10010Sstevel@tonic-gate 					break;
10020Sstevel@tonic-gate 				/* Is it still stopped? */
10030Sstevel@tonic-gate 				mutex_enter(&cp->p_lock);
10040Sstevel@tonic-gate 				if (!jobstopped(cp)) {
10050Sstevel@tonic-gate 					mutex_exit(&cp->p_lock);
10060Sstevel@tonic-gate 					break;
10070Sstevel@tonic-gate 				}
10080Sstevel@tonic-gate 				mutex_exit(&cp->p_lock);
10090Sstevel@tonic-gate 				winfo(cp, ip, waitflag);
10100Sstevel@tonic-gate 				mutex_exit(&pidlock);
10110Sstevel@tonic-gate 				if (waitflag) {		/* accept SIGCLD */
10120Sstevel@tonic-gate 					sigcld_delete(ip);
10130Sstevel@tonic-gate 					sigcld_repost();
10140Sstevel@tonic-gate 				}
10150Sstevel@tonic-gate 				return (0);
10160Sstevel@tonic-gate 
10170Sstevel@tonic-gate 			case CLD_CONTINUED:
10180Sstevel@tonic-gate 				if (!(options & WCONTINUED))
10190Sstevel@tonic-gate 					break;
10200Sstevel@tonic-gate 				winfo(cp, ip, waitflag);
10210Sstevel@tonic-gate 				mutex_exit(&pidlock);
10220Sstevel@tonic-gate 				if (waitflag) {		/* accept SIGCLD */
10230Sstevel@tonic-gate 					sigcld_delete(ip);
10240Sstevel@tonic-gate 					sigcld_repost();
10250Sstevel@tonic-gate 				}
10260Sstevel@tonic-gate 				return (0);
10270Sstevel@tonic-gate 
10280Sstevel@tonic-gate 			case CLD_EXITED:
10290Sstevel@tonic-gate 			case CLD_DUMPED:
10300Sstevel@tonic-gate 			case CLD_KILLED:
10313235Sraf 				if (idtype != P_PID &&
10323235Sraf 				    (cp->p_pidflag & CLDWAITPID))
10333235Sraf 					continue;
10340Sstevel@tonic-gate 				/*
10350Sstevel@tonic-gate 				 * Don't complain if a process was found in
10360Sstevel@tonic-gate 				 * the first loop but we broke out of the loop
10370Sstevel@tonic-gate 				 * because of the arguments passed to us.
10380Sstevel@tonic-gate 				 */
10390Sstevel@tonic-gate 				if (proc_gone == 0) {
10400Sstevel@tonic-gate 					cmn_err(CE_PANIC,
10410Sstevel@tonic-gate 					    "waitid: wrong state on the"
10420Sstevel@tonic-gate 					    " p_child list");
10430Sstevel@tonic-gate 				} else {
10440Sstevel@tonic-gate 					break;
10450Sstevel@tonic-gate 				}
10460Sstevel@tonic-gate 			}
10470Sstevel@tonic-gate 
10483235Sraf 			found++;
10493235Sraf 
10500Sstevel@tonic-gate 			if (idtype == P_PID)
10510Sstevel@tonic-gate 				break;
10523235Sraf 		}
10530Sstevel@tonic-gate 
10540Sstevel@tonic-gate 		/*
10550Sstevel@tonic-gate 		 * If we found no interesting processes at all,
10560Sstevel@tonic-gate 		 * break out and return ECHILD.
10570Sstevel@tonic-gate 		 */
10580Sstevel@tonic-gate 		if (found + proc_gone == 0)
10590Sstevel@tonic-gate 			break;
10600Sstevel@tonic-gate 
10610Sstevel@tonic-gate 		if (options & WNOHANG) {
10623235Sraf 			mutex_exit(&pidlock);
10630Sstevel@tonic-gate 			bzero(ip, sizeof (k_siginfo_t));
10640Sstevel@tonic-gate 			/*
10650Sstevel@tonic-gate 			 * We should set ip->si_signo = SIGCLD,
10660Sstevel@tonic-gate 			 * but there is an SVVS test that expects
10670Sstevel@tonic-gate 			 * ip->si_signo to be zero in this case.
10680Sstevel@tonic-gate 			 */
10690Sstevel@tonic-gate 			return (0);
10700Sstevel@tonic-gate 		}
10710Sstevel@tonic-gate 
10720Sstevel@tonic-gate 		/*
10730Sstevel@tonic-gate 		 * If we found no processes of interest that could
10740Sstevel@tonic-gate 		 * change state while we wait, we don't wait at all.
10750Sstevel@tonic-gate 		 * Get out with ECHILD according to SVID.
10760Sstevel@tonic-gate 		 */
10770Sstevel@tonic-gate 		if (found == proc_gone)
10780Sstevel@tonic-gate 			break;
10790Sstevel@tonic-gate 
10800Sstevel@tonic-gate 		if (!cv_wait_sig_swap(&pp->p_cv, &pidlock)) {
10810Sstevel@tonic-gate 			mutex_exit(&pidlock);
10820Sstevel@tonic-gate 			return (EINTR);
10830Sstevel@tonic-gate 		}
10840Sstevel@tonic-gate 	}
10850Sstevel@tonic-gate 	mutex_exit(&pidlock);
10860Sstevel@tonic-gate 	return (ECHILD);
10870Sstevel@tonic-gate }
10880Sstevel@tonic-gate 
10890Sstevel@tonic-gate /*
10903235Sraf  * The wait() system call trap is no longer invoked by libc.
10913235Sraf  * It is retained only for the benefit of statically linked applications.
10923235Sraf  * Delete this when we no longer care about these old and broken applications.
10930Sstevel@tonic-gate  */
10940Sstevel@tonic-gate int64_t
10950Sstevel@tonic-gate wait(void)
10960Sstevel@tonic-gate {
10970Sstevel@tonic-gate 	int error;
10980Sstevel@tonic-gate 	k_siginfo_t info;
10990Sstevel@tonic-gate 	rval_t	r;
11000Sstevel@tonic-gate 
11010Sstevel@tonic-gate 	if (error =  waitid(P_ALL, (id_t)0, &info, WEXITED|WTRAPPED))
11020Sstevel@tonic-gate 		return (set_errno(error));
11030Sstevel@tonic-gate 	r.r_val1 = info.si_pid;
11040Sstevel@tonic-gate 	r.r_val2 = wstat(info.si_code, info.si_status);
11050Sstevel@tonic-gate 	return (r.r_vals);
11060Sstevel@tonic-gate }
11070Sstevel@tonic-gate 
11080Sstevel@tonic-gate int
11090Sstevel@tonic-gate waitsys(idtype_t idtype, id_t id, siginfo_t *infop, int options)
11100Sstevel@tonic-gate {
11110Sstevel@tonic-gate 	int error;
11120Sstevel@tonic-gate 	k_siginfo_t info;
11130Sstevel@tonic-gate 
11140Sstevel@tonic-gate 	if (error = waitid(idtype, id, &info, options))
11150Sstevel@tonic-gate 		return (set_errno(error));
11160Sstevel@tonic-gate 	if (copyout(&info, infop, sizeof (k_siginfo_t)))
11170Sstevel@tonic-gate 		return (set_errno(EFAULT));
11180Sstevel@tonic-gate 	return (0);
11190Sstevel@tonic-gate }
11200Sstevel@tonic-gate 
11210Sstevel@tonic-gate #ifdef _SYSCALL32_IMPL
11220Sstevel@tonic-gate 
11230Sstevel@tonic-gate int
11240Sstevel@tonic-gate waitsys32(idtype_t idtype, id_t id, siginfo_t *infop, int options)
11250Sstevel@tonic-gate {
11260Sstevel@tonic-gate 	int error;
11270Sstevel@tonic-gate 	k_siginfo_t info;
11280Sstevel@tonic-gate 	siginfo32_t info32;
11290Sstevel@tonic-gate 
11300Sstevel@tonic-gate 	if (error = waitid(idtype, id, &info, options))
11310Sstevel@tonic-gate 		return (set_errno(error));
11320Sstevel@tonic-gate 	siginfo_kto32(&info, &info32);
11330Sstevel@tonic-gate 	if (copyout(&info32, infop, sizeof (info32)))
11340Sstevel@tonic-gate 		return (set_errno(EFAULT));
11350Sstevel@tonic-gate 	return (0);
11360Sstevel@tonic-gate }
11370Sstevel@tonic-gate 
11380Sstevel@tonic-gate #endif	/* _SYSCALL32_IMPL */
11390Sstevel@tonic-gate 
11400Sstevel@tonic-gate void
11410Sstevel@tonic-gate proc_detach(proc_t *p)
11420Sstevel@tonic-gate {
11430Sstevel@tonic-gate 	proc_t *q;
11440Sstevel@tonic-gate 
11450Sstevel@tonic-gate 	ASSERT(MUTEX_HELD(&pidlock));
11460Sstevel@tonic-gate 
11470Sstevel@tonic-gate 	q = p->p_parent;
11480Sstevel@tonic-gate 	ASSERT(q != NULL);
11490Sstevel@tonic-gate 
11500Sstevel@tonic-gate 	/*
11510Sstevel@tonic-gate 	 * Take it off the newstate list of its parent
11520Sstevel@tonic-gate 	 */
11530Sstevel@tonic-gate 	delete_ns(q, p);
11540Sstevel@tonic-gate 
11550Sstevel@tonic-gate 	if (q->p_child == p) {
11560Sstevel@tonic-gate 		q->p_child = p->p_sibling;
11570Sstevel@tonic-gate 		/*
11580Sstevel@tonic-gate 		 * If the parent has no children, it better not
11590Sstevel@tonic-gate 		 * have any with new states either!
11600Sstevel@tonic-gate 		 */
11610Sstevel@tonic-gate 		ASSERT(q->p_child ? 1 : q->p_child_ns == NULL);
11620Sstevel@tonic-gate 	}
11630Sstevel@tonic-gate 
11640Sstevel@tonic-gate 	if (p->p_sibling) {
11650Sstevel@tonic-gate 		p->p_sibling->p_psibling = p->p_psibling;
11660Sstevel@tonic-gate 	}
11670Sstevel@tonic-gate 
11680Sstevel@tonic-gate 	if (p->p_psibling) {
11690Sstevel@tonic-gate 		p->p_psibling->p_sibling = p->p_sibling;
11700Sstevel@tonic-gate 	}
11710Sstevel@tonic-gate }
11720Sstevel@tonic-gate 
11730Sstevel@tonic-gate /*
11740Sstevel@tonic-gate  * Remove zombie children from the process table.
11750Sstevel@tonic-gate  */
11760Sstevel@tonic-gate void
11770Sstevel@tonic-gate freeproc(proc_t *p)
11780Sstevel@tonic-gate {
11790Sstevel@tonic-gate 	proc_t *q;
11800Sstevel@tonic-gate 
11810Sstevel@tonic-gate 	ASSERT(p->p_stat == SZOMB);
11820Sstevel@tonic-gate 	ASSERT(p->p_tlist == NULL);
11830Sstevel@tonic-gate 	ASSERT(MUTEX_HELD(&pidlock));
11840Sstevel@tonic-gate 
11850Sstevel@tonic-gate 	sigdelq(p, NULL, 0);
11860Sstevel@tonic-gate 	if (p->p_killsqp) {
11870Sstevel@tonic-gate 		siginfofree(p->p_killsqp);
11880Sstevel@tonic-gate 		p->p_killsqp = NULL;
11890Sstevel@tonic-gate 	}
11900Sstevel@tonic-gate 
11910Sstevel@tonic-gate 	prfree(p);	/* inform /proc */
11920Sstevel@tonic-gate 
11930Sstevel@tonic-gate 	/*
11940Sstevel@tonic-gate 	 * Don't free the init processes.
11950Sstevel@tonic-gate 	 * Other dying processes will access it.
11960Sstevel@tonic-gate 	 */
11970Sstevel@tonic-gate 	if (p == proc_init)
11980Sstevel@tonic-gate 		return;
11990Sstevel@tonic-gate 
12000Sstevel@tonic-gate 
12010Sstevel@tonic-gate 	/*
12020Sstevel@tonic-gate 	 * We wait until now to free the cred structure because a
12030Sstevel@tonic-gate 	 * zombie process's credentials may be examined by /proc.
12040Sstevel@tonic-gate 	 * No cred locking needed because there are no threads at this point.
12050Sstevel@tonic-gate 	 */
12060Sstevel@tonic-gate 	upcount_dec(crgetruid(p->p_cred), crgetzoneid(p->p_cred));
12070Sstevel@tonic-gate 	crfree(p->p_cred);
12080Sstevel@tonic-gate 	if (p->p_corefile != NULL) {
12090Sstevel@tonic-gate 		corectl_path_rele(p->p_corefile);
12100Sstevel@tonic-gate 		p->p_corefile = NULL;
12110Sstevel@tonic-gate 	}
12120Sstevel@tonic-gate 	if (p->p_content != NULL) {
12130Sstevel@tonic-gate 		corectl_content_rele(p->p_content);
12140Sstevel@tonic-gate 		p->p_content = NULL;
12150Sstevel@tonic-gate 	}
12160Sstevel@tonic-gate 
12170Sstevel@tonic-gate 	if (p->p_nextofkin && !((p->p_nextofkin->p_flag & SNOWAIT) ||
12180Sstevel@tonic-gate 	    (PTOU(p->p_nextofkin)->u_signal[SIGCLD - 1] == SIG_IGN))) {
12190Sstevel@tonic-gate 		/*
12200Sstevel@tonic-gate 		 * This should still do the right thing since p_utime/stime
12210Sstevel@tonic-gate 		 * get set to the correct value on process exit, so it
12220Sstevel@tonic-gate 		 * should get properly updated
12230Sstevel@tonic-gate 		 */
12240Sstevel@tonic-gate 		p->p_nextofkin->p_cutime += p->p_utime;
12250Sstevel@tonic-gate 		p->p_nextofkin->p_cstime += p->p_stime;
12260Sstevel@tonic-gate 
12270Sstevel@tonic-gate 		p->p_nextofkin->p_cacct[LMS_USER] += p->p_acct[LMS_USER];
12280Sstevel@tonic-gate 		p->p_nextofkin->p_cacct[LMS_SYSTEM] += p->p_acct[LMS_SYSTEM];
12290Sstevel@tonic-gate 		p->p_nextofkin->p_cacct[LMS_TRAP] += p->p_acct[LMS_TRAP];
12300Sstevel@tonic-gate 		p->p_nextofkin->p_cacct[LMS_TFAULT] += p->p_acct[LMS_TFAULT];
12310Sstevel@tonic-gate 		p->p_nextofkin->p_cacct[LMS_DFAULT] += p->p_acct[LMS_DFAULT];
12320Sstevel@tonic-gate 		p->p_nextofkin->p_cacct[LMS_KFAULT] += p->p_acct[LMS_KFAULT];
12330Sstevel@tonic-gate 		p->p_nextofkin->p_cacct[LMS_USER_LOCK]
12340Sstevel@tonic-gate 		    += p->p_acct[LMS_USER_LOCK];
12350Sstevel@tonic-gate 		p->p_nextofkin->p_cacct[LMS_SLEEP] += p->p_acct[LMS_SLEEP];
12360Sstevel@tonic-gate 		p->p_nextofkin->p_cacct[LMS_WAIT_CPU]
12370Sstevel@tonic-gate 		    += p->p_acct[LMS_WAIT_CPU];
12380Sstevel@tonic-gate 		p->p_nextofkin->p_cacct[LMS_STOPPED] += p->p_acct[LMS_STOPPED];
12390Sstevel@tonic-gate 
12400Sstevel@tonic-gate 		p->p_nextofkin->p_cru.minflt	+= p->p_ru.minflt;
12410Sstevel@tonic-gate 		p->p_nextofkin->p_cru.majflt	+= p->p_ru.majflt;
12420Sstevel@tonic-gate 		p->p_nextofkin->p_cru.nswap	+= p->p_ru.nswap;
12430Sstevel@tonic-gate 		p->p_nextofkin->p_cru.inblock	+= p->p_ru.inblock;
12440Sstevel@tonic-gate 		p->p_nextofkin->p_cru.oublock	+= p->p_ru.oublock;
12450Sstevel@tonic-gate 		p->p_nextofkin->p_cru.msgsnd	+= p->p_ru.msgsnd;
12460Sstevel@tonic-gate 		p->p_nextofkin->p_cru.msgrcv	+= p->p_ru.msgrcv;
12470Sstevel@tonic-gate 		p->p_nextofkin->p_cru.nsignals	+= p->p_ru.nsignals;
12480Sstevel@tonic-gate 		p->p_nextofkin->p_cru.nvcsw	+= p->p_ru.nvcsw;
12490Sstevel@tonic-gate 		p->p_nextofkin->p_cru.nivcsw	+= p->p_ru.nivcsw;
12500Sstevel@tonic-gate 		p->p_nextofkin->p_cru.sysc	+= p->p_ru.sysc;
12510Sstevel@tonic-gate 		p->p_nextofkin->p_cru.ioch	+= p->p_ru.ioch;
12520Sstevel@tonic-gate 
12530Sstevel@tonic-gate 	}
12540Sstevel@tonic-gate 
12550Sstevel@tonic-gate 	q = p->p_nextofkin;
12560Sstevel@tonic-gate 	if (q && q->p_orphan == p)
12570Sstevel@tonic-gate 		q->p_orphan = p->p_nextorph;
12580Sstevel@tonic-gate 	else if (q) {
12590Sstevel@tonic-gate 		for (q = q->p_orphan; q; q = q->p_nextorph)
12600Sstevel@tonic-gate 			if (q->p_nextorph == p)
12610Sstevel@tonic-gate 				break;
12620Sstevel@tonic-gate 		ASSERT(q && q->p_nextorph == p);
12630Sstevel@tonic-gate 		q->p_nextorph = p->p_nextorph;
12640Sstevel@tonic-gate 	}
12650Sstevel@tonic-gate 
12660Sstevel@tonic-gate 	proc_detach(p);
12670Sstevel@tonic-gate 	pid_exit(p);	/* frees pid and proc structure */
12680Sstevel@tonic-gate }
12690Sstevel@tonic-gate 
12700Sstevel@tonic-gate /*
12710Sstevel@tonic-gate  * Delete process "child" from the newstate list of process "parent"
12720Sstevel@tonic-gate  */
12730Sstevel@tonic-gate void
12740Sstevel@tonic-gate delete_ns(proc_t *parent, proc_t *child)
12750Sstevel@tonic-gate {
12760Sstevel@tonic-gate 	proc_t **ns;
12770Sstevel@tonic-gate 
12780Sstevel@tonic-gate 	ASSERT(MUTEX_HELD(&pidlock));
12790Sstevel@tonic-gate 	ASSERT(child->p_parent == parent);
12800Sstevel@tonic-gate 	for (ns = &parent->p_child_ns; *ns != NULL; ns = &(*ns)->p_sibling_ns) {
12810Sstevel@tonic-gate 		if (*ns == child) {
12820Sstevel@tonic-gate 
12830Sstevel@tonic-gate 			ASSERT((*ns)->p_parent == parent);
12840Sstevel@tonic-gate 
12850Sstevel@tonic-gate 			*ns = child->p_sibling_ns;
12860Sstevel@tonic-gate 			child->p_sibling_ns = NULL;
12870Sstevel@tonic-gate 			return;
12880Sstevel@tonic-gate 		}
12890Sstevel@tonic-gate 	}
12900Sstevel@tonic-gate }
12910Sstevel@tonic-gate 
12920Sstevel@tonic-gate /*
12930Sstevel@tonic-gate  * Add process "child" to the new state list of process "parent"
12940Sstevel@tonic-gate  */
12950Sstevel@tonic-gate void
12960Sstevel@tonic-gate add_ns(proc_t *parent, proc_t *child)
12970Sstevel@tonic-gate {
12980Sstevel@tonic-gate 	ASSERT(child->p_sibling_ns == NULL);
12990Sstevel@tonic-gate 	child->p_sibling_ns = parent->p_child_ns;
13000Sstevel@tonic-gate 	parent->p_child_ns = child;
13010Sstevel@tonic-gate }
1302