2 * Copyright (c) 1982, 1986, 1989, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
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6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
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14 * may be used to endorse or promote products derived from this software
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29 * @(#)kern_proc.c 8.7 (Berkeley) 2/14/95
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include "opt_compat.h"
37 #include "opt_kdtrace.h"
38 #include "opt_ktrace.h"
39 #include "opt_kstack_pages.h"
40 #include "opt_stack.h"
42 #include <sys/param.h>
43 #include <sys/systm.h>
46 #include <sys/kernel.h>
47 #include <sys/limits.h>
49 #include <sys/loginclass.h>
50 #include <sys/malloc.h>
52 #include <sys/mount.h>
53 #include <sys/mutex.h>
55 #include <sys/ptrace.h>
56 #include <sys/refcount.h>
57 #include <sys/resourcevar.h>
59 #include <sys/sysent.h>
60 #include <sys/sched.h>
62 #include <sys/stack.h>
63 #include <sys/sysctl.h>
64 #include <sys/filedesc.h>
66 #include <sys/signalvar.h>
71 #include <sys/vnode.h>
72 #include <sys/eventhandler.h>
79 #include <vm/vm_extern.h>
81 #include <vm/vm_map.h>
82 #include <vm/vm_object.h>
83 #include <vm/vm_page.h>
86 #ifdef COMPAT_FREEBSD32
87 #include <compat/freebsd32/freebsd32.h>
88 #include <compat/freebsd32/freebsd32_util.h>
91 SDT_PROVIDER_DEFINE(proc);
92 SDT_PROBE_DEFINE(proc, kernel, ctor, entry, entry);
93 SDT_PROBE_ARGTYPE(proc, kernel, ctor, entry, 0, "struct proc *");
94 SDT_PROBE_ARGTYPE(proc, kernel, ctor, entry, 1, "int");
95 SDT_PROBE_ARGTYPE(proc, kernel, ctor, entry, 2, "void *");
96 SDT_PROBE_ARGTYPE(proc, kernel, ctor, entry, 3, "int");
97 SDT_PROBE_DEFINE(proc, kernel, ctor, return, return);
98 SDT_PROBE_ARGTYPE(proc, kernel, ctor, return, 0, "struct proc *");
99 SDT_PROBE_ARGTYPE(proc, kernel, ctor, return, 1, "int");
100 SDT_PROBE_ARGTYPE(proc, kernel, ctor, return, 2, "void *");
101 SDT_PROBE_ARGTYPE(proc, kernel, ctor, return, 3, "int");
102 SDT_PROBE_DEFINE(proc, kernel, dtor, entry, entry);
103 SDT_PROBE_ARGTYPE(proc, kernel, dtor, entry, 0, "struct proc *");
104 SDT_PROBE_ARGTYPE(proc, kernel, dtor, entry, 1, "int");
105 SDT_PROBE_ARGTYPE(proc, kernel, dtor, entry, 2, "void *");
106 SDT_PROBE_ARGTYPE(proc, kernel, dtor, entry, 3, "struct thread *");
107 SDT_PROBE_DEFINE(proc, kernel, dtor, return, return);
108 SDT_PROBE_ARGTYPE(proc, kernel, dtor, return, 0, "struct proc *");
109 SDT_PROBE_ARGTYPE(proc, kernel, dtor, return, 1, "int");
110 SDT_PROBE_ARGTYPE(proc, kernel, dtor, return, 2, "void *");
111 SDT_PROBE_DEFINE(proc, kernel, init, entry, entry);
112 SDT_PROBE_ARGTYPE(proc, kernel, init, entry, 0, "struct proc *");
113 SDT_PROBE_ARGTYPE(proc, kernel, init, entry, 1, "int");
114 SDT_PROBE_ARGTYPE(proc, kernel, init, entry, 2, "int");
115 SDT_PROBE_DEFINE(proc, kernel, init, return, return);
116 SDT_PROBE_ARGTYPE(proc, kernel, init, return, 0, "struct proc *");
117 SDT_PROBE_ARGTYPE(proc, kernel, init, return, 1, "int");
118 SDT_PROBE_ARGTYPE(proc, kernel, init, return, 2, "int");
120 MALLOC_DEFINE(M_PGRP, "pgrp", "process group header");
121 MALLOC_DEFINE(M_SESSION, "session", "session header");
122 static MALLOC_DEFINE(M_PROC, "proc", "Proc structures");
123 MALLOC_DEFINE(M_SUBPROC, "subproc", "Proc sub-structures");
125 static void doenterpgrp(struct proc *, struct pgrp *);
126 static void orphanpg(struct pgrp *pg);
127 static void fill_kinfo_aggregate(struct proc *p, struct kinfo_proc *kp);
128 static void fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp);
129 static void fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp,
131 static void pgadjustjobc(struct pgrp *pgrp, int entering);
132 static void pgdelete(struct pgrp *);
133 static int proc_ctor(void *mem, int size, void *arg, int flags);
134 static void proc_dtor(void *mem, int size, void *arg);
135 static int proc_init(void *mem, int size, int flags);
136 static void proc_fini(void *mem, int size);
137 static void pargs_free(struct pargs *pa);
140 * Other process lists
142 struct pidhashhead *pidhashtbl;
144 struct pgrphashhead *pgrphashtbl;
146 struct proclist allproc;
147 struct proclist zombproc;
148 struct sx allproc_lock;
149 struct sx proctree_lock;
150 struct mtx ppeers_lock;
151 uma_zone_t proc_zone;
153 int kstack_pages = KSTACK_PAGES;
154 SYSCTL_INT(_kern, OID_AUTO, kstack_pages, CTLFLAG_RD, &kstack_pages, 0,
155 "Kernel stack size in pages");
157 CTASSERT(sizeof(struct kinfo_proc) == KINFO_PROC_SIZE);
158 #ifdef COMPAT_FREEBSD32
159 CTASSERT(sizeof(struct kinfo_proc32) == KINFO_PROC32_SIZE);
163 * Initialize global process hashing structures.
169 sx_init(&allproc_lock, "allproc");
170 sx_init(&proctree_lock, "proctree");
171 mtx_init(&ppeers_lock, "p_peers", NULL, MTX_DEF);
173 LIST_INIT(&zombproc);
174 pidhashtbl = hashinit(maxproc / 4, M_PROC, &pidhash);
175 pgrphashtbl = hashinit(maxproc / 4, M_PROC, &pgrphash);
176 proc_zone = uma_zcreate("PROC", sched_sizeof_proc(),
177 proc_ctor, proc_dtor, proc_init, proc_fini,
178 UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
183 * Prepare a proc for use.
186 proc_ctor(void *mem, int size, void *arg, int flags)
190 p = (struct proc *)mem;
191 SDT_PROBE(proc, kernel, ctor , entry, p, size, arg, flags, 0);
192 EVENTHANDLER_INVOKE(process_ctor, p);
193 SDT_PROBE(proc, kernel, ctor , return, p, size, arg, flags, 0);
198 * Reclaim a proc after use.
201 proc_dtor(void *mem, int size, void *arg)
206 /* INVARIANTS checks go here */
207 p = (struct proc *)mem;
208 td = FIRST_THREAD_IN_PROC(p);
209 SDT_PROBE(proc, kernel, dtor, entry, p, size, arg, td, 0);
212 KASSERT((p->p_numthreads == 1),
213 ("bad number of threads in exiting process"));
214 KASSERT(STAILQ_EMPTY(&p->p_ktr), ("proc_dtor: non-empty p_ktr"));
216 /* Free all OSD associated to this thread. */
219 EVENTHANDLER_INVOKE(process_dtor, p);
220 if (p->p_ksi != NULL)
221 KASSERT(! KSI_ONQ(p->p_ksi), ("SIGCHLD queue"));
222 SDT_PROBE(proc, kernel, dtor, return, p, size, arg, 0, 0);
226 * Initialize type-stable parts of a proc (when newly created).
229 proc_init(void *mem, int size, int flags)
233 p = (struct proc *)mem;
234 SDT_PROBE(proc, kernel, init, entry, p, size, flags, 0, 0);
235 p->p_sched = (struct p_sched *)&p[1];
236 bzero(&p->p_mtx, sizeof(struct mtx));
237 mtx_init(&p->p_mtx, "process lock", NULL, MTX_DEF | MTX_DUPOK);
238 mtx_init(&p->p_slock, "process slock", NULL, MTX_SPIN | MTX_RECURSE);
239 cv_init(&p->p_pwait, "ppwait");
240 cv_init(&p->p_dbgwait, "dbgwait");
241 TAILQ_INIT(&p->p_threads); /* all threads in proc */
242 EVENTHANDLER_INVOKE(process_init, p);
243 p->p_stats = pstats_alloc();
244 SDT_PROBE(proc, kernel, init, return, p, size, flags, 0, 0);
249 * UMA should ensure that this function is never called.
250 * Freeing a proc structure would violate type stability.
253 proc_fini(void *mem, int size)
258 p = (struct proc *)mem;
259 EVENTHANDLER_INVOKE(process_fini, p);
260 pstats_free(p->p_stats);
261 thread_free(FIRST_THREAD_IN_PROC(p));
262 mtx_destroy(&p->p_mtx);
263 if (p->p_ksi != NULL)
264 ksiginfo_free(p->p_ksi);
266 panic("proc reclaimed");
271 * Is p an inferior of the current process?
275 register struct proc *p;
278 sx_assert(&proctree_lock, SX_LOCKED);
279 for (; p != curproc; p = p->p_pptr)
286 * Locate a process by number; return only "live" processes -- i.e., neither
287 * zombies nor newly born but incompletely initialized processes. By not
288 * returning processes in the PRS_NEW state, we allow callers to avoid
289 * testing for that condition to avoid dereferencing p_ucred, et al.
295 register struct proc *p;
297 sx_slock(&allproc_lock);
298 LIST_FOREACH(p, PIDHASH(pid), p_hash)
299 if (p->p_pid == pid) {
301 if (p->p_state == PRS_NEW) {
307 sx_sunlock(&allproc_lock);
312 * Locate a process group by number.
313 * The caller must hold proctree_lock.
319 register struct pgrp *pgrp;
321 sx_assert(&proctree_lock, SX_LOCKED);
323 LIST_FOREACH(pgrp, PGRPHASH(pgid), pg_hash) {
324 if (pgrp->pg_id == pgid) {
333 * Locate process and do additional manipulations, depending on flags.
336 pget(pid_t pid, int flags, struct proc **pp)
344 if ((flags & PGET_CANSEE) != 0) {
345 error = p_cansee(curthread, p);
349 if ((flags & PGET_CANDEBUG) != 0) {
350 error = p_candebug(curthread, p);
354 if ((flags & PGET_ISCURRENT) != 0 && curproc != p) {
358 if ((flags & PGET_NOTWEXIT) != 0 && (p->p_flag & P_WEXIT) != 0) {
362 if ((flags & PGET_NOTINEXEC) != 0 && (p->p_flag & P_INEXEC) != 0) {
364 * XXXRW: Not clear ESRCH is the right error during proc
370 if ((flags & PGET_HOLD) != 0) {
382 * Create a new process group.
383 * pgid must be equal to the pid of p.
384 * Begin a new session if required.
387 enterpgrp(p, pgid, pgrp, sess)
388 register struct proc *p;
391 struct session *sess;
395 sx_assert(&proctree_lock, SX_XLOCKED);
397 KASSERT(pgrp != NULL, ("enterpgrp: pgrp == NULL"));
398 KASSERT(p->p_pid == pgid,
399 ("enterpgrp: new pgrp and pid != pgid"));
401 pgrp2 = pgfind(pgid);
403 KASSERT(pgrp2 == NULL,
404 ("enterpgrp: pgrp with pgid exists"));
405 KASSERT(!SESS_LEADER(p),
406 ("enterpgrp: session leader attempted setpgrp"));
408 mtx_init(&pgrp->pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK);
414 mtx_init(&sess->s_mtx, "session", NULL, MTX_DEF);
416 p->p_flag &= ~P_CONTROLT;
420 sess->s_sid = p->p_pid;
421 refcount_init(&sess->s_count, 1);
422 sess->s_ttyvp = NULL;
423 sess->s_ttydp = NULL;
425 bcopy(p->p_session->s_login, sess->s_login,
426 sizeof(sess->s_login));
427 pgrp->pg_session = sess;
428 KASSERT(p == curproc,
429 ("enterpgrp: mksession and p != curproc"));
431 pgrp->pg_session = p->p_session;
432 sess_hold(pgrp->pg_session);
436 LIST_INIT(&pgrp->pg_members);
439 * As we have an exclusive lock of proctree_lock,
440 * this should not deadlock.
442 LIST_INSERT_HEAD(PGRPHASH(pgid), pgrp, pg_hash);
444 SLIST_INIT(&pgrp->pg_sigiolst);
447 doenterpgrp(p, pgrp);
453 * Move p to an existing process group
456 enterthispgrp(p, pgrp)
457 register struct proc *p;
461 sx_assert(&proctree_lock, SX_XLOCKED);
462 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
463 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
464 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
465 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
466 KASSERT(pgrp->pg_session == p->p_session,
467 ("%s: pgrp's session %p, p->p_session %p.\n",
471 KASSERT(pgrp != p->p_pgrp,
472 ("%s: p belongs to pgrp.", __func__));
474 doenterpgrp(p, pgrp);
480 * Move p to a process group
487 struct pgrp *savepgrp;
489 sx_assert(&proctree_lock, SX_XLOCKED);
490 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
491 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
492 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
493 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
495 savepgrp = p->p_pgrp;
498 * Adjust eligibility of affected pgrps to participate in job control.
499 * Increment eligibility counts before decrementing, otherwise we
500 * could reach 0 spuriously during the first call.
503 fixjobc(p, p->p_pgrp, 0);
508 LIST_REMOVE(p, p_pglist);
511 LIST_INSERT_HEAD(&pgrp->pg_members, p, p_pglist);
512 PGRP_UNLOCK(savepgrp);
514 if (LIST_EMPTY(&savepgrp->pg_members))
519 * remove process from process group
523 register struct proc *p;
525 struct pgrp *savepgrp;
527 sx_assert(&proctree_lock, SX_XLOCKED);
528 savepgrp = p->p_pgrp;
531 LIST_REMOVE(p, p_pglist);
534 PGRP_UNLOCK(savepgrp);
535 if (LIST_EMPTY(&savepgrp->pg_members))
541 * delete a process group
545 register struct pgrp *pgrp;
547 struct session *savesess;
550 sx_assert(&proctree_lock, SX_XLOCKED);
551 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
552 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
555 * Reset any sigio structures pointing to us as a result of
556 * F_SETOWN with our pgid.
558 funsetownlst(&pgrp->pg_sigiolst);
561 tp = pgrp->pg_session->s_ttyp;
562 LIST_REMOVE(pgrp, pg_hash);
563 savesess = pgrp->pg_session;
566 /* Remove the reference to the pgrp before deallocating it. */
569 tty_rel_pgrp(tp, pgrp);
572 mtx_destroy(&pgrp->pg_mtx);
574 sess_release(savesess);
578 pgadjustjobc(pgrp, entering)
588 if (pgrp->pg_jobc == 0)
595 * Adjust pgrp jobc counters when specified process changes process group.
596 * We count the number of processes in each process group that "qualify"
597 * the group for terminal job control (those with a parent in a different
598 * process group of the same session). If that count reaches zero, the
599 * process group becomes orphaned. Check both the specified process'
600 * process group and that of its children.
601 * entering == 0 => p is leaving specified group.
602 * entering == 1 => p is entering specified group.
605 fixjobc(p, pgrp, entering)
606 register struct proc *p;
607 register struct pgrp *pgrp;
610 register struct pgrp *hispgrp;
611 register struct session *mysession;
613 sx_assert(&proctree_lock, SX_LOCKED);
614 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
615 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
616 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
619 * Check p's parent to see whether p qualifies its own process
620 * group; if so, adjust count for p's process group.
622 mysession = pgrp->pg_session;
623 if ((hispgrp = p->p_pptr->p_pgrp) != pgrp &&
624 hispgrp->pg_session == mysession)
625 pgadjustjobc(pgrp, entering);
628 * Check this process' children to see whether they qualify
629 * their process groups; if so, adjust counts for children's
632 LIST_FOREACH(p, &p->p_children, p_sibling) {
634 if (hispgrp == pgrp ||
635 hispgrp->pg_session != mysession)
638 if (p->p_state == PRS_ZOMBIE) {
643 pgadjustjobc(hispgrp, entering);
648 * A process group has become orphaned;
649 * if there are any stopped processes in the group,
650 * hang-up all process in that group.
656 register struct proc *p;
658 PGRP_LOCK_ASSERT(pg, MA_OWNED);
660 LIST_FOREACH(p, &pg->pg_members, p_pglist) {
662 if (P_SHOULDSTOP(p)) {
664 LIST_FOREACH(p, &pg->pg_members, p_pglist) {
666 kern_psignal(p, SIGHUP);
667 kern_psignal(p, SIGCONT);
677 sess_hold(struct session *s)
680 refcount_acquire(&s->s_count);
684 sess_release(struct session *s)
687 if (refcount_release(&s->s_count)) {
688 if (s->s_ttyp != NULL) {
690 tty_rel_sess(s->s_ttyp, s);
692 mtx_destroy(&s->s_mtx);
701 DB_SHOW_COMMAND(pgrpdump, pgrpdump)
703 register struct pgrp *pgrp;
704 register struct proc *p;
707 for (i = 0; i <= pgrphash; i++) {
708 if (!LIST_EMPTY(&pgrphashtbl[i])) {
709 printf("\tindx %d\n", i);
710 LIST_FOREACH(pgrp, &pgrphashtbl[i], pg_hash) {
712 "\tpgrp %p, pgid %ld, sess %p, sesscnt %d, mem %p\n",
713 (void *)pgrp, (long)pgrp->pg_id,
714 (void *)pgrp->pg_session,
715 pgrp->pg_session->s_count,
716 (void *)LIST_FIRST(&pgrp->pg_members));
717 LIST_FOREACH(p, &pgrp->pg_members, p_pglist) {
718 printf("\t\tpid %ld addr %p pgrp %p\n",
719 (long)p->p_pid, (void *)p,
729 * Calculate the kinfo_proc members which contain process-wide
731 * Must be called with the target process locked.
734 fill_kinfo_aggregate(struct proc *p, struct kinfo_proc *kp)
738 PROC_LOCK_ASSERT(p, MA_OWNED);
742 FOREACH_THREAD_IN_PROC(p, td) {
744 kp->ki_pctcpu += sched_pctcpu(td);
745 kp->ki_estcpu += td->td_estcpu;
751 * Clear kinfo_proc and fill in any information that is common
752 * to all threads in the process.
753 * Must be called with the target process locked.
756 fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp)
764 PROC_LOCK_ASSERT(p, MA_OWNED);
765 bzero(kp, sizeof(*kp));
767 kp->ki_structsize = sizeof(*kp);
769 kp->ki_addr =/* p->p_addr; */0; /* XXX */
770 kp->ki_args = p->p_args;
771 kp->ki_textvp = p->p_textvp;
773 kp->ki_tracep = p->p_tracevp;
774 kp->ki_traceflag = p->p_traceflag;
777 kp->ki_vmspace = p->p_vmspace;
778 kp->ki_flag = p->p_flag;
781 kp->ki_uid = cred->cr_uid;
782 kp->ki_ruid = cred->cr_ruid;
783 kp->ki_svuid = cred->cr_svuid;
785 if (cred->cr_flags & CRED_FLAG_CAPMODE)
786 kp->ki_cr_flags |= KI_CRF_CAPABILITY_MODE;
787 /* XXX bde doesn't like KI_NGROUPS */
788 if (cred->cr_ngroups > KI_NGROUPS) {
789 kp->ki_ngroups = KI_NGROUPS;
790 kp->ki_cr_flags |= KI_CRF_GRP_OVERFLOW;
792 kp->ki_ngroups = cred->cr_ngroups;
793 bcopy(cred->cr_groups, kp->ki_groups,
794 kp->ki_ngroups * sizeof(gid_t));
795 kp->ki_rgid = cred->cr_rgid;
796 kp->ki_svgid = cred->cr_svgid;
797 /* If jailed(cred), emulate the old P_JAILED flag. */
799 kp->ki_flag |= P_JAILED;
800 /* If inside the jail, use 0 as a jail ID. */
801 if (cred->cr_prison != curthread->td_ucred->cr_prison)
802 kp->ki_jid = cred->cr_prison->pr_id;
804 strlcpy(kp->ki_loginclass, cred->cr_loginclass->lc_name,
805 sizeof(kp->ki_loginclass));
809 mtx_lock(&ps->ps_mtx);
810 kp->ki_sigignore = ps->ps_sigignore;
811 kp->ki_sigcatch = ps->ps_sigcatch;
812 mtx_unlock(&ps->ps_mtx);
814 if (p->p_state != PRS_NEW &&
815 p->p_state != PRS_ZOMBIE &&
816 p->p_vmspace != NULL) {
817 struct vmspace *vm = p->p_vmspace;
819 kp->ki_size = vm->vm_map.size;
820 kp->ki_rssize = vmspace_resident_count(vm); /*XXX*/
821 FOREACH_THREAD_IN_PROC(p, td0) {
822 if (!TD_IS_SWAPPED(td0))
823 kp->ki_rssize += td0->td_kstack_pages;
825 kp->ki_swrss = vm->vm_swrss;
826 kp->ki_tsize = vm->vm_tsize;
827 kp->ki_dsize = vm->vm_dsize;
828 kp->ki_ssize = vm->vm_ssize;
829 } else if (p->p_state == PRS_ZOMBIE)
831 if (kp->ki_flag & P_INMEM)
832 kp->ki_sflag = PS_INMEM;
835 /* Calculate legacy swtime as seconds since 'swtick'. */
836 kp->ki_swtime = (ticks - p->p_swtick) / hz;
837 kp->ki_pid = p->p_pid;
838 kp->ki_nice = p->p_nice;
839 kp->ki_start = p->p_stats->p_start;
840 timevaladd(&kp->ki_start, &boottime);
842 rufetch(p, &kp->ki_rusage);
843 kp->ki_runtime = cputick2usec(p->p_rux.rux_runtime);
844 calcru(p, &kp->ki_rusage.ru_utime, &kp->ki_rusage.ru_stime);
846 calccru(p, &kp->ki_childutime, &kp->ki_childstime);
847 /* Some callers want child times in a single value. */
848 kp->ki_childtime = kp->ki_childstime;
849 timevaladd(&kp->ki_childtime, &kp->ki_childutime);
853 kp->ki_pgid = p->p_pgrp->pg_id;
854 kp->ki_jobc = p->p_pgrp->pg_jobc;
855 sp = p->p_pgrp->pg_session;
858 kp->ki_sid = sp->s_sid;
860 strlcpy(kp->ki_login, sp->s_login,
861 sizeof(kp->ki_login));
863 kp->ki_kiflag |= KI_CTTY;
865 kp->ki_kiflag |= KI_SLEADER;
866 /* XXX proctree_lock */
871 if ((p->p_flag & P_CONTROLT) && tp != NULL) {
872 kp->ki_tdev = tty_udev(tp);
873 kp->ki_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
875 kp->ki_tsid = tp->t_session->s_sid;
878 if (p->p_comm[0] != '\0')
879 strlcpy(kp->ki_comm, p->p_comm, sizeof(kp->ki_comm));
880 if (p->p_sysent && p->p_sysent->sv_name != NULL &&
881 p->p_sysent->sv_name[0] != '\0')
882 strlcpy(kp->ki_emul, p->p_sysent->sv_name, sizeof(kp->ki_emul));
883 kp->ki_siglist = p->p_siglist;
884 kp->ki_xstat = p->p_xstat;
885 kp->ki_acflag = p->p_acflag;
886 kp->ki_lock = p->p_lock;
888 kp->ki_ppid = p->p_pptr->p_pid;
892 * Fill in information that is thread specific. Must be called with
893 * target process locked. If 'preferthread' is set, overwrite certain
894 * process-related fields that are maintained for both threads and
898 fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp, int preferthread)
904 PROC_LOCK_ASSERT(p, MA_OWNED);
909 if (td->td_wmesg != NULL)
910 strlcpy(kp->ki_wmesg, td->td_wmesg, sizeof(kp->ki_wmesg));
912 bzero(kp->ki_wmesg, sizeof(kp->ki_wmesg));
913 strlcpy(kp->ki_tdname, td->td_name, sizeof(kp->ki_tdname));
914 if (TD_ON_LOCK(td)) {
915 kp->ki_kiflag |= KI_LOCKBLOCK;
916 strlcpy(kp->ki_lockname, td->td_lockname,
917 sizeof(kp->ki_lockname));
919 kp->ki_kiflag &= ~KI_LOCKBLOCK;
920 bzero(kp->ki_lockname, sizeof(kp->ki_lockname));
923 if (p->p_state == PRS_NORMAL) { /* approximate. */
924 if (TD_ON_RUNQ(td) ||
928 } else if (P_SHOULDSTOP(p)) {
930 } else if (TD_IS_SLEEPING(td)) {
931 kp->ki_stat = SSLEEP;
932 } else if (TD_ON_LOCK(td)) {
937 } else if (p->p_state == PRS_ZOMBIE) {
943 /* Things in the thread */
944 kp->ki_wchan = td->td_wchan;
945 kp->ki_pri.pri_level = td->td_priority;
946 kp->ki_pri.pri_native = td->td_base_pri;
947 kp->ki_lastcpu = td->td_lastcpu;
948 kp->ki_oncpu = td->td_oncpu;
949 kp->ki_tdflags = td->td_flags;
950 kp->ki_tid = td->td_tid;
951 kp->ki_numthreads = p->p_numthreads;
952 kp->ki_pcb = td->td_pcb;
953 kp->ki_kstack = (void *)td->td_kstack;
954 kp->ki_slptime = (ticks - td->td_slptick) / hz;
955 kp->ki_pri.pri_class = td->td_pri_class;
956 kp->ki_pri.pri_user = td->td_user_pri;
959 rufetchtd(td, &kp->ki_rusage);
960 kp->ki_runtime = cputick2usec(td->td_rux.rux_runtime);
961 kp->ki_pctcpu = sched_pctcpu(td);
962 kp->ki_estcpu = td->td_estcpu;
965 /* We can't get this anymore but ps etc never used it anyway. */
969 kp->ki_siglist = td->td_siglist;
970 kp->ki_sigmask = td->td_sigmask;
977 * Fill in a kinfo_proc structure for the specified process.
978 * Must be called with the target process locked.
981 fill_kinfo_proc(struct proc *p, struct kinfo_proc *kp)
984 MPASS(FIRST_THREAD_IN_PROC(p) != NULL);
986 fill_kinfo_proc_only(p, kp);
987 fill_kinfo_thread(FIRST_THREAD_IN_PROC(p), kp, 0);
988 fill_kinfo_aggregate(p, kp);
995 return (malloc(sizeof(struct pstats), M_SUBPROC, M_ZERO|M_WAITOK));
999 * Copy parts of p_stats; zero the rest of p_stats (statistics).
1002 pstats_fork(struct pstats *src, struct pstats *dst)
1005 bzero(&dst->pstat_startzero,
1006 __rangeof(struct pstats, pstat_startzero, pstat_endzero));
1007 bcopy(&src->pstat_startcopy, &dst->pstat_startcopy,
1008 __rangeof(struct pstats, pstat_startcopy, pstat_endcopy));
1012 pstats_free(struct pstats *ps)
1015 free(ps, M_SUBPROC);
1019 * Locate a zombie process by number
1026 sx_slock(&allproc_lock);
1027 LIST_FOREACH(p, &zombproc, p_list)
1028 if (p->p_pid == pid) {
1032 sx_sunlock(&allproc_lock);
1036 #define KERN_PROC_ZOMBMASK 0x3
1037 #define KERN_PROC_NOTHREADS 0x4
1039 #ifdef COMPAT_FREEBSD32
1042 * This function is typically used to copy out the kernel address, so
1043 * it can be replaced by assignment of zero.
1045 static inline uint32_t
1046 ptr32_trim(void *ptr)
1050 uptr = (uintptr_t)ptr;
1051 return ((uptr > UINT_MAX) ? 0 : uptr);
1054 #define PTRTRIM_CP(src,dst,fld) \
1055 do { (dst).fld = ptr32_trim((src).fld); } while (0)
1058 freebsd32_kinfo_proc_out(const struct kinfo_proc *ki, struct kinfo_proc32 *ki32)
1062 bzero(ki32, sizeof(struct kinfo_proc32));
1063 ki32->ki_structsize = sizeof(struct kinfo_proc32);
1064 CP(*ki, *ki32, ki_layout);
1065 PTRTRIM_CP(*ki, *ki32, ki_args);
1066 PTRTRIM_CP(*ki, *ki32, ki_paddr);
1067 PTRTRIM_CP(*ki, *ki32, ki_addr);
1068 PTRTRIM_CP(*ki, *ki32, ki_tracep);
1069 PTRTRIM_CP(*ki, *ki32, ki_textvp);
1070 PTRTRIM_CP(*ki, *ki32, ki_fd);
1071 PTRTRIM_CP(*ki, *ki32, ki_vmspace);
1072 PTRTRIM_CP(*ki, *ki32, ki_wchan);
1073 CP(*ki, *ki32, ki_pid);
1074 CP(*ki, *ki32, ki_ppid);
1075 CP(*ki, *ki32, ki_pgid);
1076 CP(*ki, *ki32, ki_tpgid);
1077 CP(*ki, *ki32, ki_sid);
1078 CP(*ki, *ki32, ki_tsid);
1079 CP(*ki, *ki32, ki_jobc);
1080 CP(*ki, *ki32, ki_tdev);
1081 CP(*ki, *ki32, ki_siglist);
1082 CP(*ki, *ki32, ki_sigmask);
1083 CP(*ki, *ki32, ki_sigignore);
1084 CP(*ki, *ki32, ki_sigcatch);
1085 CP(*ki, *ki32, ki_uid);
1086 CP(*ki, *ki32, ki_ruid);
1087 CP(*ki, *ki32, ki_svuid);
1088 CP(*ki, *ki32, ki_rgid);
1089 CP(*ki, *ki32, ki_svgid);
1090 CP(*ki, *ki32, ki_ngroups);
1091 for (i = 0; i < KI_NGROUPS; i++)
1092 CP(*ki, *ki32, ki_groups[i]);
1093 CP(*ki, *ki32, ki_size);
1094 CP(*ki, *ki32, ki_rssize);
1095 CP(*ki, *ki32, ki_swrss);
1096 CP(*ki, *ki32, ki_tsize);
1097 CP(*ki, *ki32, ki_dsize);
1098 CP(*ki, *ki32, ki_ssize);
1099 CP(*ki, *ki32, ki_xstat);
1100 CP(*ki, *ki32, ki_acflag);
1101 CP(*ki, *ki32, ki_pctcpu);
1102 CP(*ki, *ki32, ki_estcpu);
1103 CP(*ki, *ki32, ki_slptime);
1104 CP(*ki, *ki32, ki_swtime);
1105 CP(*ki, *ki32, ki_runtime);
1106 TV_CP(*ki, *ki32, ki_start);
1107 TV_CP(*ki, *ki32, ki_childtime);
1108 CP(*ki, *ki32, ki_flag);
1109 CP(*ki, *ki32, ki_kiflag);
1110 CP(*ki, *ki32, ki_traceflag);
1111 CP(*ki, *ki32, ki_stat);
1112 CP(*ki, *ki32, ki_nice);
1113 CP(*ki, *ki32, ki_lock);
1114 CP(*ki, *ki32, ki_rqindex);
1115 CP(*ki, *ki32, ki_oncpu);
1116 CP(*ki, *ki32, ki_lastcpu);
1117 bcopy(ki->ki_tdname, ki32->ki_tdname, TDNAMLEN + 1);
1118 bcopy(ki->ki_wmesg, ki32->ki_wmesg, WMESGLEN + 1);
1119 bcopy(ki->ki_login, ki32->ki_login, LOGNAMELEN + 1);
1120 bcopy(ki->ki_lockname, ki32->ki_lockname, LOCKNAMELEN + 1);
1121 bcopy(ki->ki_comm, ki32->ki_comm, COMMLEN + 1);
1122 bcopy(ki->ki_emul, ki32->ki_emul, KI_EMULNAMELEN + 1);
1123 bcopy(ki->ki_loginclass, ki32->ki_loginclass, LOGINCLASSLEN + 1);
1124 CP(*ki, *ki32, ki_cr_flags);
1125 CP(*ki, *ki32, ki_jid);
1126 CP(*ki, *ki32, ki_numthreads);
1127 CP(*ki, *ki32, ki_tid);
1128 CP(*ki, *ki32, ki_pri);
1129 freebsd32_rusage_out(&ki->ki_rusage, &ki32->ki_rusage);
1130 freebsd32_rusage_out(&ki->ki_rusage_ch, &ki32->ki_rusage_ch);
1131 PTRTRIM_CP(*ki, *ki32, ki_pcb);
1132 PTRTRIM_CP(*ki, *ki32, ki_kstack);
1133 PTRTRIM_CP(*ki, *ki32, ki_udata);
1134 CP(*ki, *ki32, ki_sflag);
1135 CP(*ki, *ki32, ki_tdflags);
1139 sysctl_out_proc_copyout(struct kinfo_proc *ki, struct sysctl_req *req)
1141 struct kinfo_proc32 ki32;
1144 if (req->flags & SCTL_MASK32) {
1145 freebsd32_kinfo_proc_out(ki, &ki32);
1146 error = SYSCTL_OUT(req, &ki32, sizeof(struct kinfo_proc32));
1148 error = SYSCTL_OUT(req, ki, sizeof(struct kinfo_proc));
1153 sysctl_out_proc_copyout(struct kinfo_proc *ki, struct sysctl_req *req)
1156 return (SYSCTL_OUT(req, ki, sizeof(struct kinfo_proc)));
1161 * Must be called with the process locked and will return with it unlocked.
1164 sysctl_out_proc(struct proc *p, struct sysctl_req *req, int flags)
1167 struct kinfo_proc kinfo_proc;
1170 pid_t pid = p->p_pid;
1172 PROC_LOCK_ASSERT(p, MA_OWNED);
1173 MPASS(FIRST_THREAD_IN_PROC(p) != NULL);
1175 fill_kinfo_proc(p, &kinfo_proc);
1176 if (flags & KERN_PROC_NOTHREADS)
1177 error = sysctl_out_proc_copyout(&kinfo_proc, req);
1179 FOREACH_THREAD_IN_PROC(p, td) {
1180 fill_kinfo_thread(td, &kinfo_proc, 1);
1181 error = sysctl_out_proc_copyout(&kinfo_proc, req);
1189 if (flags & KERN_PROC_ZOMBMASK)
1207 sysctl_kern_proc(SYSCTL_HANDLER_ARGS)
1209 int *name = (int *)arg1;
1210 u_int namelen = arg2;
1212 int flags, doingzomb, oid_number;
1215 oid_number = oidp->oid_number;
1216 if (oid_number != KERN_PROC_ALL &&
1217 (oid_number & KERN_PROC_INC_THREAD) == 0)
1218 flags = KERN_PROC_NOTHREADS;
1221 oid_number &= ~KERN_PROC_INC_THREAD;
1223 if (oid_number == KERN_PROC_PID) {
1226 error = sysctl_wire_old_buffer(req, 0);
1229 error = pget((pid_t)name[0], PGET_CANSEE, &p);
1232 error = sysctl_out_proc(p, req, flags);
1236 switch (oid_number) {
1241 case KERN_PROC_PROC:
1242 if (namelen != 0 && namelen != 1)
1252 /* overestimate by 5 procs */
1253 error = SYSCTL_OUT(req, 0, sizeof (struct kinfo_proc) * 5);
1257 error = sysctl_wire_old_buffer(req, 0);
1260 sx_slock(&allproc_lock);
1261 for (doingzomb=0 ; doingzomb < 2 ; doingzomb++) {
1263 p = LIST_FIRST(&allproc);
1265 p = LIST_FIRST(&zombproc);
1266 for (; p != 0; p = LIST_NEXT(p, p_list)) {
1268 * Skip embryonic processes.
1271 if (p->p_state == PRS_NEW) {
1275 KASSERT(p->p_ucred != NULL,
1276 ("process credential is NULL for non-NEW proc"));
1278 * Show a user only appropriate processes.
1280 if (p_cansee(curthread, p)) {
1285 * TODO - make more efficient (see notes below).
1288 switch (oid_number) {
1291 if (p->p_ucred->cr_gid != (gid_t)name[0]) {
1297 case KERN_PROC_PGRP:
1298 /* could do this by traversing pgrp */
1299 if (p->p_pgrp == NULL ||
1300 p->p_pgrp->pg_id != (pid_t)name[0]) {
1306 case KERN_PROC_RGID:
1307 if (p->p_ucred->cr_rgid != (gid_t)name[0]) {
1313 case KERN_PROC_SESSION:
1314 if (p->p_session == NULL ||
1315 p->p_session->s_sid != (pid_t)name[0]) {
1322 if ((p->p_flag & P_CONTROLT) == 0 ||
1323 p->p_session == NULL) {
1327 /* XXX proctree_lock */
1328 SESS_LOCK(p->p_session);
1329 if (p->p_session->s_ttyp == NULL ||
1330 tty_udev(p->p_session->s_ttyp) !=
1332 SESS_UNLOCK(p->p_session);
1336 SESS_UNLOCK(p->p_session);
1340 if (p->p_ucred->cr_uid != (uid_t)name[0]) {
1346 case KERN_PROC_RUID:
1347 if (p->p_ucred->cr_ruid != (uid_t)name[0]) {
1353 case KERN_PROC_PROC:
1361 error = sysctl_out_proc(p, req, flags | doingzomb);
1363 sx_sunlock(&allproc_lock);
1368 sx_sunlock(&allproc_lock);
1373 pargs_alloc(int len)
1377 pa = malloc(sizeof(struct pargs) + len, M_PARGS,
1379 refcount_init(&pa->ar_ref, 1);
1380 pa->ar_length = len;
1385 pargs_free(struct pargs *pa)
1392 pargs_hold(struct pargs *pa)
1397 refcount_acquire(&pa->ar_ref);
1401 pargs_drop(struct pargs *pa)
1406 if (refcount_release(&pa->ar_ref))
1411 proc_read_mem(struct thread *td, struct proc *p, vm_offset_t offset, void* buf,
1417 iov.iov_base = (caddr_t)buf;
1421 uio.uio_offset = offset;
1422 uio.uio_resid = (ssize_t)len;
1423 uio.uio_segflg = UIO_SYSSPACE;
1424 uio.uio_rw = UIO_READ;
1427 return (proc_rwmem(p, &uio));
1431 proc_read_string(struct thread *td, struct proc *p, const char *sptr, char *buf,
1437 error = proc_read_mem(td, p, (vm_offset_t)sptr, buf, len);
1439 * Reading the chunk may validly return EFAULT if the string is shorter
1440 * than the chunk and is aligned at the end of the page, assuming the
1441 * next page is not mapped. So if EFAULT is returned do a fallback to
1442 * one byte read loop.
1444 if (error == EFAULT) {
1445 for (i = 0; i < len; i++, buf++, sptr++) {
1446 error = proc_read_mem(td, p, (vm_offset_t)sptr, buf, 1);
1457 #define PROC_AUXV_MAX 256 /* Safety limit on auxv size. */
1459 enum proc_vector_type {
1465 #ifdef COMPAT_FREEBSD32
1467 get_proc_vector32(struct thread *td, struct proc *p, char ***proc_vectorp,
1468 size_t *vsizep, enum proc_vector_type type)
1470 struct freebsd32_ps_strings pss;
1472 vm_offset_t vptr, ptr;
1473 uint32_t *proc_vector32;
1478 error = proc_read_mem(td, p, (vm_offset_t)(p->p_sysent->sv_psstrings),
1484 vptr = (vm_offset_t)PTRIN(pss.ps_argvstr);
1485 vsize = pss.ps_nargvstr;
1486 if (vsize > ARG_MAX)
1488 size = vsize * sizeof(int32_t);
1491 vptr = (vm_offset_t)PTRIN(pss.ps_envstr);
1492 vsize = pss.ps_nenvstr;
1493 if (vsize > ARG_MAX)
1495 size = vsize * sizeof(int32_t);
1498 vptr = (vm_offset_t)PTRIN(pss.ps_envstr) +
1499 (pss.ps_nenvstr + 1) * sizeof(int32_t);
1502 for (ptr = vptr, i = 0; i < PROC_AUXV_MAX; i++) {
1503 error = proc_read_mem(td, p, ptr, &aux, sizeof(aux));
1506 if (aux.a_type == AT_NULL)
1510 if (aux.a_type != AT_NULL)
1513 size = vsize * sizeof(aux);
1516 KASSERT(0, ("Wrong proc vector type: %d", type));
1519 proc_vector32 = malloc(size, M_TEMP, M_WAITOK);
1520 error = proc_read_mem(td, p, vptr, proc_vector32, size);
1523 if (type == PROC_AUX) {
1524 *proc_vectorp = (char **)proc_vector32;
1528 proc_vector = malloc(vsize * sizeof(char *), M_TEMP, M_WAITOK);
1529 for (i = 0; i < (int)vsize; i++)
1530 proc_vector[i] = PTRIN(proc_vector32[i]);
1531 *proc_vectorp = proc_vector;
1534 free(proc_vector32, M_TEMP);
1540 get_proc_vector(struct thread *td, struct proc *p, char ***proc_vectorp,
1541 size_t *vsizep, enum proc_vector_type type)
1543 struct ps_strings pss;
1545 vm_offset_t vptr, ptr;
1550 #ifdef COMPAT_FREEBSD32
1551 if (SV_PROC_FLAG(p, SV_ILP32) != 0)
1552 return (get_proc_vector32(td, p, proc_vectorp, vsizep, type));
1554 error = proc_read_mem(td, p, (vm_offset_t)(p->p_sysent->sv_psstrings),
1560 vptr = (vm_offset_t)pss.ps_argvstr;
1561 vsize = pss.ps_nargvstr;
1562 if (vsize > ARG_MAX)
1564 size = vsize * sizeof(char *);
1567 vptr = (vm_offset_t)pss.ps_envstr;
1568 vsize = pss.ps_nenvstr;
1569 if (vsize > ARG_MAX)
1571 size = vsize * sizeof(char *);
1575 * The aux array is just above env array on the stack. Check
1576 * that the address is naturally aligned.
1578 vptr = (vm_offset_t)pss.ps_envstr + (pss.ps_nenvstr + 1)
1580 #if __ELF_WORD_SIZE == 64
1581 if (vptr % sizeof(uint64_t) != 0)
1583 if (vptr % sizeof(uint32_t) != 0)
1587 * We count the array size reading the aux vectors from the
1588 * stack until AT_NULL vector is returned. So (to keep the code
1589 * simple) we read the process stack twice: the first time here
1590 * to find the size and the second time when copying the vectors
1591 * to the allocated proc_vector.
1593 for (ptr = vptr, i = 0; i < PROC_AUXV_MAX; i++) {
1594 error = proc_read_mem(td, p, ptr, &aux, sizeof(aux));
1597 if (aux.a_type == AT_NULL)
1602 * If the PROC_AUXV_MAX entries are iterated over, and we have
1603 * not reached AT_NULL, it is most likely we are reading wrong
1604 * data: either the process doesn't have auxv array or data has
1605 * been modified. Return the error in this case.
1607 if (aux.a_type != AT_NULL)
1610 size = vsize * sizeof(aux);
1613 KASSERT(0, ("Wrong proc vector type: %d", type));
1614 return (EINVAL); /* In case we are built without INVARIANTS. */
1616 proc_vector = malloc(size, M_TEMP, M_WAITOK);
1617 if (proc_vector == NULL)
1619 error = proc_read_mem(td, p, vptr, proc_vector, size);
1621 free(proc_vector, M_TEMP);
1624 *proc_vectorp = proc_vector;
1630 #define GET_PS_STRINGS_CHUNK_SZ 256 /* Chunk size (bytes) for ps_strings operations. */
1633 get_ps_strings(struct thread *td, struct proc *p, struct sbuf *sb,
1634 enum proc_vector_type type)
1636 size_t done, len, nchr, vsize;
1638 char **proc_vector, *sptr;
1639 char pss_string[GET_PS_STRINGS_CHUNK_SZ];
1641 PROC_ASSERT_HELD(p);
1644 * We are not going to read more than 2 * (PATH_MAX + ARG_MAX) bytes.
1646 nchr = 2 * (PATH_MAX + ARG_MAX);
1648 error = get_proc_vector(td, p, &proc_vector, &vsize, type);
1651 for (done = 0, i = 0; i < (int)vsize && done < nchr; i++) {
1653 * The program may have scribbled into its argv array, e.g. to
1654 * remove some arguments. If that has happened, break out
1655 * before trying to read from NULL.
1657 if (proc_vector[i] == NULL)
1659 for (sptr = proc_vector[i]; ; sptr += GET_PS_STRINGS_CHUNK_SZ) {
1660 error = proc_read_string(td, p, sptr, pss_string,
1661 sizeof(pss_string));
1664 len = strnlen(pss_string, GET_PS_STRINGS_CHUNK_SZ);
1665 if (done + len >= nchr)
1666 len = nchr - done - 1;
1667 sbuf_bcat(sb, pss_string, len);
1668 if (len != GET_PS_STRINGS_CHUNK_SZ)
1670 done += GET_PS_STRINGS_CHUNK_SZ;
1672 sbuf_bcat(sb, "", 1);
1676 free(proc_vector, M_TEMP);
1681 proc_getargv(struct thread *td, struct proc *p, struct sbuf *sb)
1684 return (get_ps_strings(curthread, p, sb, PROC_ARG));
1688 proc_getenvv(struct thread *td, struct proc *p, struct sbuf *sb)
1691 return (get_ps_strings(curthread, p, sb, PROC_ENV));
1695 * This sysctl allows a process to retrieve the argument list or process
1696 * title for another process without groping around in the address space
1697 * of the other process. It also allow a process to set its own "process
1698 * title to a string of its own choice.
1701 sysctl_kern_proc_args(SYSCTL_HANDLER_ARGS)
1703 int *name = (int *)arg1;
1704 u_int namelen = arg2;
1705 struct pargs *newpa, *pa;
1708 int flags, error = 0, error2;
1713 flags = PGET_CANSEE;
1714 if (req->newptr != NULL)
1715 flags |= PGET_ISCURRENT;
1716 error = pget((pid_t)name[0], flags, &p);
1724 error = SYSCTL_OUT(req, pa->ar_args, pa->ar_length);
1726 } else if ((p->p_flag & (P_WEXIT | P_SYSTEM)) == 0) {
1729 sbuf_new_for_sysctl(&sb, NULL, GET_PS_STRINGS_CHUNK_SZ, req);
1730 error = proc_getargv(curthread, p, &sb);
1731 error2 = sbuf_finish(&sb);
1734 if (error == 0 && error2 != 0)
1739 if (error != 0 || req->newptr == NULL)
1742 if (req->newlen + sizeof(struct pargs) > ps_arg_cache_limit)
1744 newpa = pargs_alloc(req->newlen);
1745 error = SYSCTL_IN(req, newpa->ar_args, req->newlen);
1759 * This sysctl allows a process to retrieve environment of another process.
1762 sysctl_kern_proc_env(SYSCTL_HANDLER_ARGS)
1764 int *name = (int *)arg1;
1765 u_int namelen = arg2;
1773 error = pget((pid_t)name[0], PGET_WANTREAD, &p);
1776 if ((p->p_flag & P_SYSTEM) != 0) {
1781 sbuf_new_for_sysctl(&sb, NULL, GET_PS_STRINGS_CHUNK_SZ, req);
1782 error = proc_getenvv(curthread, p, &sb);
1783 error2 = sbuf_finish(&sb);
1786 return (error != 0 ? error : error2);
1790 * This sysctl allows a process to retrieve ELF auxiliary vector of
1794 sysctl_kern_proc_auxv(SYSCTL_HANDLER_ARGS)
1796 int *name = (int *)arg1;
1797 u_int namelen = arg2;
1806 error = pget((pid_t)name[0], PGET_WANTREAD, &p);
1809 if ((p->p_flag & P_SYSTEM) != 0) {
1813 error = get_proc_vector(curthread, p, &auxv, &vsize, PROC_AUX);
1815 #ifdef COMPAT_FREEBSD32
1816 if (SV_PROC_FLAG(p, SV_ILP32) != 0)
1817 size = vsize * sizeof(Elf32_Auxinfo);
1820 size = vsize * sizeof(Elf_Auxinfo);
1822 error = SYSCTL_OUT(req, auxv, size);
1831 * This sysctl allows a process to retrieve the path of the executable for
1832 * itself or another process.
1835 sysctl_kern_proc_pathname(SYSCTL_HANDLER_ARGS)
1837 pid_t *pidp = (pid_t *)arg1;
1838 unsigned int arglen = arg2;
1841 char *retbuf, *freebuf;
1842 int error, vfslocked;
1846 if (*pidp == -1) { /* -1 means this process */
1847 p = req->td->td_proc;
1849 error = pget(*pidp, PGET_CANSEE, &p);
1863 error = vn_fullpath(req->td, vp, &retbuf, &freebuf);
1864 vfslocked = VFS_LOCK_GIANT(vp->v_mount);
1866 VFS_UNLOCK_GIANT(vfslocked);
1869 error = SYSCTL_OUT(req, retbuf, strlen(retbuf) + 1);
1870 free(freebuf, M_TEMP);
1875 sysctl_kern_proc_sv_name(SYSCTL_HANDLER_ARGS)
1888 error = pget((pid_t)name[0], PGET_CANSEE, &p);
1891 sv_name = p->p_sysent->sv_name;
1893 return (sysctl_handle_string(oidp, sv_name, 0, req));
1896 #ifdef KINFO_OVMENTRY_SIZE
1897 CTASSERT(sizeof(struct kinfo_ovmentry) == KINFO_OVMENTRY_SIZE);
1900 #ifdef COMPAT_FREEBSD7
1902 sysctl_kern_proc_ovmmap(SYSCTL_HANDLER_ARGS)
1904 vm_map_entry_t entry, tmp_entry;
1905 unsigned int last_timestamp;
1906 char *fullpath, *freepath;
1907 struct kinfo_ovmentry *kve;
1917 error = pget((pid_t)name[0], PGET_WANTREAD, &p);
1920 vm = vmspace_acquire_ref(p);
1925 kve = malloc(sizeof(*kve), M_TEMP, M_WAITOK);
1927 map = &p->p_vmspace->vm_map; /* XXXRW: More locking required? */
1928 vm_map_lock_read(map);
1929 for (entry = map->header.next; entry != &map->header;
1930 entry = entry->next) {
1931 vm_object_t obj, tobj, lobj;
1935 if (entry->eflags & MAP_ENTRY_IS_SUB_MAP)
1938 bzero(kve, sizeof(*kve));
1939 kve->kve_structsize = sizeof(*kve);
1941 kve->kve_private_resident = 0;
1942 obj = entry->object.vm_object;
1944 VM_OBJECT_LOCK(obj);
1945 if (obj->shadow_count == 1)
1946 kve->kve_private_resident =
1947 obj->resident_page_count;
1949 kve->kve_resident = 0;
1950 addr = entry->start;
1951 while (addr < entry->end) {
1952 if (pmap_extract(map->pmap, addr))
1953 kve->kve_resident++;
1957 for (lobj = tobj = obj; tobj; tobj = tobj->backing_object) {
1959 VM_OBJECT_LOCK(tobj);
1961 VM_OBJECT_UNLOCK(lobj);
1965 kve->kve_start = (void*)entry->start;
1966 kve->kve_end = (void*)entry->end;
1967 kve->kve_offset = (off_t)entry->offset;
1969 if (entry->protection & VM_PROT_READ)
1970 kve->kve_protection |= KVME_PROT_READ;
1971 if (entry->protection & VM_PROT_WRITE)
1972 kve->kve_protection |= KVME_PROT_WRITE;
1973 if (entry->protection & VM_PROT_EXECUTE)
1974 kve->kve_protection |= KVME_PROT_EXEC;
1976 if (entry->eflags & MAP_ENTRY_COW)
1977 kve->kve_flags |= KVME_FLAG_COW;
1978 if (entry->eflags & MAP_ENTRY_NEEDS_COPY)
1979 kve->kve_flags |= KVME_FLAG_NEEDS_COPY;
1980 if (entry->eflags & MAP_ENTRY_NOCOREDUMP)
1981 kve->kve_flags |= KVME_FLAG_NOCOREDUMP;
1983 last_timestamp = map->timestamp;
1984 vm_map_unlock_read(map);
1986 kve->kve_fileid = 0;
1992 switch (lobj->type) {
1994 kve->kve_type = KVME_TYPE_DEFAULT;
1997 kve->kve_type = KVME_TYPE_VNODE;
2002 kve->kve_type = KVME_TYPE_SWAP;
2005 kve->kve_type = KVME_TYPE_DEVICE;
2008 kve->kve_type = KVME_TYPE_PHYS;
2011 kve->kve_type = KVME_TYPE_DEAD;
2014 kve->kve_type = KVME_TYPE_SG;
2017 kve->kve_type = KVME_TYPE_UNKNOWN;
2021 VM_OBJECT_UNLOCK(lobj);
2023 kve->kve_ref_count = obj->ref_count;
2024 kve->kve_shadow_count = obj->shadow_count;
2025 VM_OBJECT_UNLOCK(obj);
2027 vn_fullpath(curthread, vp, &fullpath,
2029 cred = curthread->td_ucred;
2030 vfslocked = VFS_LOCK_GIANT(vp->v_mount);
2031 vn_lock(vp, LK_SHARED | LK_RETRY);
2032 if (VOP_GETATTR(vp, &va, cred) == 0) {
2033 kve->kve_fileid = va.va_fileid;
2034 kve->kve_fsid = va.va_fsid;
2037 VFS_UNLOCK_GIANT(vfslocked);
2040 kve->kve_type = KVME_TYPE_NONE;
2041 kve->kve_ref_count = 0;
2042 kve->kve_shadow_count = 0;
2045 strlcpy(kve->kve_path, fullpath, sizeof(kve->kve_path));
2046 if (freepath != NULL)
2047 free(freepath, M_TEMP);
2049 error = SYSCTL_OUT(req, kve, sizeof(*kve));
2050 vm_map_lock_read(map);
2053 if (last_timestamp != map->timestamp) {
2054 vm_map_lookup_entry(map, addr - 1, &tmp_entry);
2058 vm_map_unlock_read(map);
2064 #endif /* COMPAT_FREEBSD7 */
2066 #ifdef KINFO_VMENTRY_SIZE
2067 CTASSERT(sizeof(struct kinfo_vmentry) == KINFO_VMENTRY_SIZE);
2071 sysctl_kern_proc_vmmap(SYSCTL_HANDLER_ARGS)
2073 vm_map_entry_t entry, tmp_entry;
2074 unsigned int last_timestamp;
2075 char *fullpath, *freepath;
2076 struct kinfo_vmentry *kve;
2086 error = pget((pid_t)name[0], PGET_WANTREAD, &p);
2089 vm = vmspace_acquire_ref(p);
2094 kve = malloc(sizeof(*kve), M_TEMP, M_WAITOK);
2096 map = &vm->vm_map; /* XXXRW: More locking required? */
2097 vm_map_lock_read(map);
2098 for (entry = map->header.next; entry != &map->header;
2099 entry = entry->next) {
2100 vm_object_t obj, tobj, lobj;
2102 vm_paddr_t locked_pa;
2103 int vfslocked, mincoreinfo;
2105 if (entry->eflags & MAP_ENTRY_IS_SUB_MAP)
2108 bzero(kve, sizeof(*kve));
2110 kve->kve_private_resident = 0;
2111 obj = entry->object.vm_object;
2113 VM_OBJECT_LOCK(obj);
2114 if (obj->shadow_count == 1)
2115 kve->kve_private_resident =
2116 obj->resident_page_count;
2118 kve->kve_resident = 0;
2119 addr = entry->start;
2120 while (addr < entry->end) {
2122 mincoreinfo = pmap_mincore(map->pmap, addr, &locked_pa);
2124 vm_page_unlock(PHYS_TO_VM_PAGE(locked_pa));
2125 if (mincoreinfo & MINCORE_INCORE)
2126 kve->kve_resident++;
2127 if (mincoreinfo & MINCORE_SUPER)
2128 kve->kve_flags |= KVME_FLAG_SUPER;
2132 for (lobj = tobj = obj; tobj; tobj = tobj->backing_object) {
2134 VM_OBJECT_LOCK(tobj);
2136 VM_OBJECT_UNLOCK(lobj);
2140 kve->kve_start = entry->start;
2141 kve->kve_end = entry->end;
2142 kve->kve_offset = entry->offset;
2144 if (entry->protection & VM_PROT_READ)
2145 kve->kve_protection |= KVME_PROT_READ;
2146 if (entry->protection & VM_PROT_WRITE)
2147 kve->kve_protection |= KVME_PROT_WRITE;
2148 if (entry->protection & VM_PROT_EXECUTE)
2149 kve->kve_protection |= KVME_PROT_EXEC;
2151 if (entry->eflags & MAP_ENTRY_COW)
2152 kve->kve_flags |= KVME_FLAG_COW;
2153 if (entry->eflags & MAP_ENTRY_NEEDS_COPY)
2154 kve->kve_flags |= KVME_FLAG_NEEDS_COPY;
2155 if (entry->eflags & MAP_ENTRY_NOCOREDUMP)
2156 kve->kve_flags |= KVME_FLAG_NOCOREDUMP;
2158 last_timestamp = map->timestamp;
2159 vm_map_unlock_read(map);
2165 switch (lobj->type) {
2167 kve->kve_type = KVME_TYPE_DEFAULT;
2170 kve->kve_type = KVME_TYPE_VNODE;
2175 kve->kve_type = KVME_TYPE_SWAP;
2178 kve->kve_type = KVME_TYPE_DEVICE;
2181 kve->kve_type = KVME_TYPE_PHYS;
2184 kve->kve_type = KVME_TYPE_DEAD;
2187 kve->kve_type = KVME_TYPE_SG;
2190 kve->kve_type = KVME_TYPE_UNKNOWN;
2194 VM_OBJECT_UNLOCK(lobj);
2196 kve->kve_ref_count = obj->ref_count;
2197 kve->kve_shadow_count = obj->shadow_count;
2198 VM_OBJECT_UNLOCK(obj);
2200 vn_fullpath(curthread, vp, &fullpath,
2202 kve->kve_vn_type = vntype_to_kinfo(vp->v_type);
2203 cred = curthread->td_ucred;
2204 vfslocked = VFS_LOCK_GIANT(vp->v_mount);
2205 vn_lock(vp, LK_SHARED | LK_RETRY);
2206 if (VOP_GETATTR(vp, &va, cred) == 0) {
2207 kve->kve_vn_fileid = va.va_fileid;
2208 kve->kve_vn_fsid = va.va_fsid;
2210 MAKEIMODE(va.va_type, va.va_mode);
2211 kve->kve_vn_size = va.va_size;
2212 kve->kve_vn_rdev = va.va_rdev;
2213 kve->kve_status = KF_ATTR_VALID;
2216 VFS_UNLOCK_GIANT(vfslocked);
2219 kve->kve_type = KVME_TYPE_NONE;
2220 kve->kve_ref_count = 0;
2221 kve->kve_shadow_count = 0;
2224 strlcpy(kve->kve_path, fullpath, sizeof(kve->kve_path));
2225 if (freepath != NULL)
2226 free(freepath, M_TEMP);
2228 /* Pack record size down */
2229 kve->kve_structsize = offsetof(struct kinfo_vmentry, kve_path) +
2230 strlen(kve->kve_path) + 1;
2231 kve->kve_structsize = roundup(kve->kve_structsize,
2233 error = SYSCTL_OUT(req, kve, kve->kve_structsize);
2234 vm_map_lock_read(map);
2237 if (last_timestamp != map->timestamp) {
2238 vm_map_lookup_entry(map, addr - 1, &tmp_entry);
2242 vm_map_unlock_read(map);
2249 #if defined(STACK) || defined(DDB)
2251 sysctl_kern_proc_kstack(SYSCTL_HANDLER_ARGS)
2253 struct kinfo_kstack *kkstp;
2254 int error, i, *name, numthreads;
2255 lwpid_t *lwpidarray;
2262 error = pget((pid_t)name[0], PGET_NOTINEXEC | PGET_WANTREAD, &p);
2266 kkstp = malloc(sizeof(*kkstp), M_TEMP, M_WAITOK);
2267 st = stack_create();
2273 if (numthreads < p->p_numthreads) {
2274 if (lwpidarray != NULL) {
2275 free(lwpidarray, M_TEMP);
2278 numthreads = p->p_numthreads;
2280 lwpidarray = malloc(sizeof(*lwpidarray) * numthreads, M_TEMP,
2288 * XXXRW: During the below loop, execve(2) and countless other sorts
2289 * of changes could have taken place. Should we check to see if the
2290 * vmspace has been replaced, or the like, in order to prevent
2291 * giving a snapshot that spans, say, execve(2), with some threads
2292 * before and some after? Among other things, the credentials could
2293 * have changed, in which case the right to extract debug info might
2294 * no longer be assured.
2296 FOREACH_THREAD_IN_PROC(p, td) {
2297 KASSERT(i < numthreads,
2298 ("sysctl_kern_proc_kstack: numthreads"));
2299 lwpidarray[i] = td->td_tid;
2303 for (i = 0; i < numthreads; i++) {
2304 td = thread_find(p, lwpidarray[i]);
2308 bzero(kkstp, sizeof(*kkstp));
2309 (void)sbuf_new(&sb, kkstp->kkst_trace,
2310 sizeof(kkstp->kkst_trace), SBUF_FIXEDLEN);
2312 kkstp->kkst_tid = td->td_tid;
2313 if (TD_IS_SWAPPED(td))
2314 kkstp->kkst_state = KKST_STATE_SWAPPED;
2315 else if (TD_IS_RUNNING(td))
2316 kkstp->kkst_state = KKST_STATE_RUNNING;
2318 kkstp->kkst_state = KKST_STATE_STACKOK;
2319 stack_save_td(st, td);
2323 stack_sbuf_print(&sb, st);
2326 error = SYSCTL_OUT(req, kkstp, sizeof(*kkstp));
2333 if (lwpidarray != NULL)
2334 free(lwpidarray, M_TEMP);
2336 free(kkstp, M_TEMP);
2342 * This sysctl allows a process to retrieve the full list of groups from
2343 * itself or another process.
2346 sysctl_kern_proc_groups(SYSCTL_HANDLER_ARGS)
2348 pid_t *pidp = (pid_t *)arg1;
2349 unsigned int arglen = arg2;
2356 if (*pidp == -1) { /* -1 means this process */
2357 p = req->td->td_proc;
2359 error = pget(*pidp, PGET_CANSEE, &p);
2364 cred = crhold(p->p_ucred);
2368 error = SYSCTL_OUT(req, cred->cr_groups,
2369 cred->cr_ngroups * sizeof(gid_t));
2375 * This sysctl allows a process to retrieve or/and set the resource limit for
2379 sysctl_kern_proc_rlimit(SYSCTL_HANDLER_ARGS)
2381 int *name = (int *)arg1;
2382 u_int namelen = arg2;
2391 which = (u_int)name[1];
2392 if (which >= RLIM_NLIMITS)
2395 if (req->newptr != NULL && req->newlen != sizeof(rlim))
2398 flags = PGET_HOLD | PGET_NOTWEXIT;
2399 if (req->newptr != NULL)
2400 flags |= PGET_CANDEBUG;
2402 flags |= PGET_CANSEE;
2403 error = pget((pid_t)name[0], flags, &p);
2410 if (req->oldptr != NULL) {
2412 lim_rlimit(p, which, &rlim);
2415 error = SYSCTL_OUT(req, &rlim, sizeof(rlim));
2422 if (req->newptr != NULL) {
2423 error = SYSCTL_IN(req, &rlim, sizeof(rlim));
2425 error = kern_proc_setrlimit(curthread, p, which, &rlim);
2434 * This sysctl allows a process to retrieve ps_strings structure location of
2438 sysctl_kern_proc_ps_strings(SYSCTL_HANDLER_ARGS)
2440 int *name = (int *)arg1;
2441 u_int namelen = arg2;
2443 vm_offset_t ps_strings;
2445 #ifdef COMPAT_FREEBSD32
2446 uint32_t ps_strings32;
2452 error = pget((pid_t)name[0], PGET_CANDEBUG, &p);
2455 #ifdef COMPAT_FREEBSD32
2456 if ((req->flags & SCTL_MASK32) != 0) {
2458 * We return 0 if the 32 bit emulation request is for a 64 bit
2461 ps_strings32 = SV_PROC_FLAG(p, SV_ILP32) != 0 ?
2462 PTROUT(p->p_sysent->sv_psstrings) : 0;
2464 error = SYSCTL_OUT(req, &ps_strings32, sizeof(ps_strings32));
2468 ps_strings = p->p_sysent->sv_psstrings;
2470 error = SYSCTL_OUT(req, &ps_strings, sizeof(ps_strings));
2474 SYSCTL_NODE(_kern, KERN_PROC, proc, CTLFLAG_RD, 0, "Process table");
2476 SYSCTL_PROC(_kern_proc, KERN_PROC_ALL, all, CTLFLAG_RD|CTLTYPE_STRUCT|
2477 CTLFLAG_MPSAFE, 0, 0, sysctl_kern_proc, "S,proc",
2478 "Return entire process table");
2480 static SYSCTL_NODE(_kern_proc, KERN_PROC_GID, gid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2481 sysctl_kern_proc, "Process table");
2483 static SYSCTL_NODE(_kern_proc, KERN_PROC_PGRP, pgrp, CTLFLAG_RD | CTLFLAG_MPSAFE,
2484 sysctl_kern_proc, "Process table");
2486 static SYSCTL_NODE(_kern_proc, KERN_PROC_RGID, rgid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2487 sysctl_kern_proc, "Process table");
2489 static SYSCTL_NODE(_kern_proc, KERN_PROC_SESSION, sid, CTLFLAG_RD |
2490 CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2492 static SYSCTL_NODE(_kern_proc, KERN_PROC_TTY, tty, CTLFLAG_RD | CTLFLAG_MPSAFE,
2493 sysctl_kern_proc, "Process table");
2495 static SYSCTL_NODE(_kern_proc, KERN_PROC_UID, uid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2496 sysctl_kern_proc, "Process table");
2498 static SYSCTL_NODE(_kern_proc, KERN_PROC_RUID, ruid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2499 sysctl_kern_proc, "Process table");
2501 static SYSCTL_NODE(_kern_proc, KERN_PROC_PID, pid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2502 sysctl_kern_proc, "Process table");
2504 static SYSCTL_NODE(_kern_proc, KERN_PROC_PROC, proc, CTLFLAG_RD | CTLFLAG_MPSAFE,
2505 sysctl_kern_proc, "Return process table, no threads");
2507 static SYSCTL_NODE(_kern_proc, KERN_PROC_ARGS, args,
2508 CTLFLAG_RW | CTLFLAG_ANYBODY | CTLFLAG_MPSAFE,
2509 sysctl_kern_proc_args, "Process argument list");
2511 static SYSCTL_NODE(_kern_proc, KERN_PROC_ENV, env, CTLFLAG_RD | CTLFLAG_MPSAFE,
2512 sysctl_kern_proc_env, "Process environment");
2514 static SYSCTL_NODE(_kern_proc, KERN_PROC_AUXV, auxv, CTLFLAG_RD |
2515 CTLFLAG_MPSAFE, sysctl_kern_proc_auxv, "Process ELF auxiliary vector");
2517 static SYSCTL_NODE(_kern_proc, KERN_PROC_PATHNAME, pathname, CTLFLAG_RD |
2518 CTLFLAG_MPSAFE, sysctl_kern_proc_pathname, "Process executable path");
2520 static SYSCTL_NODE(_kern_proc, KERN_PROC_SV_NAME, sv_name, CTLFLAG_RD |
2521 CTLFLAG_MPSAFE, sysctl_kern_proc_sv_name,
2522 "Process syscall vector name (ABI type)");
2524 static SYSCTL_NODE(_kern_proc, (KERN_PROC_GID | KERN_PROC_INC_THREAD), gid_td,
2525 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2527 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PGRP | KERN_PROC_INC_THREAD), pgrp_td,
2528 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2530 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RGID | KERN_PROC_INC_THREAD), rgid_td,
2531 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2533 static SYSCTL_NODE(_kern_proc, (KERN_PROC_SESSION | KERN_PROC_INC_THREAD),
2534 sid_td, CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2536 static SYSCTL_NODE(_kern_proc, (KERN_PROC_TTY | KERN_PROC_INC_THREAD), tty_td,
2537 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2539 static SYSCTL_NODE(_kern_proc, (KERN_PROC_UID | KERN_PROC_INC_THREAD), uid_td,
2540 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2542 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RUID | KERN_PROC_INC_THREAD), ruid_td,
2543 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2545 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PID | KERN_PROC_INC_THREAD), pid_td,
2546 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2548 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PROC | KERN_PROC_INC_THREAD), proc_td,
2549 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc,
2550 "Return process table, no threads");
2552 #ifdef COMPAT_FREEBSD7
2553 static SYSCTL_NODE(_kern_proc, KERN_PROC_OVMMAP, ovmmap, CTLFLAG_RD |
2554 CTLFLAG_MPSAFE, sysctl_kern_proc_ovmmap, "Old Process vm map entries");
2557 static SYSCTL_NODE(_kern_proc, KERN_PROC_VMMAP, vmmap, CTLFLAG_RD |
2558 CTLFLAG_MPSAFE, sysctl_kern_proc_vmmap, "Process vm map entries");
2560 #if defined(STACK) || defined(DDB)
2561 static SYSCTL_NODE(_kern_proc, KERN_PROC_KSTACK, kstack, CTLFLAG_RD |
2562 CTLFLAG_MPSAFE, sysctl_kern_proc_kstack, "Process kernel stacks");
2565 static SYSCTL_NODE(_kern_proc, KERN_PROC_GROUPS, groups, CTLFLAG_RD |
2566 CTLFLAG_MPSAFE, sysctl_kern_proc_groups, "Process groups");
2568 static SYSCTL_NODE(_kern_proc, KERN_PROC_RLIMIT, rlimit, CTLFLAG_RW |
2569 CTLFLAG_ANYBODY | CTLFLAG_MPSAFE, sysctl_kern_proc_rlimit,
2570 "Process resource limits");
2572 static SYSCTL_NODE(_kern_proc, KERN_PROC_PS_STRINGS, ps_strings, CTLFLAG_RD |
2573 CTLFLAG_MPSAFE, sysctl_kern_proc_ps_strings,
2574 "Process ps_strings location");