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>
58 #include <sys/rwlock.h>
60 #include <sys/sysent.h>
61 #include <sys/sched.h>
63 #include <sys/stack.h>
65 #include <sys/sysctl.h>
66 #include <sys/filedesc.h>
68 #include <sys/signalvar.h>
73 #include <sys/vnode.h>
74 #include <sys/eventhandler.h>
81 #include <vm/vm_param.h>
82 #include <vm/vm_extern.h>
84 #include <vm/vm_map.h>
85 #include <vm/vm_object.h>
86 #include <vm/vm_page.h>
89 #ifdef COMPAT_FREEBSD32
90 #include <compat/freebsd32/freebsd32.h>
91 #include <compat/freebsd32/freebsd32_util.h>
94 SDT_PROVIDER_DEFINE(proc);
95 SDT_PROBE_DEFINE4(proc, kernel, ctor, entry, "struct proc *", "int",
97 SDT_PROBE_DEFINE4(proc, kernel, ctor, return, "struct proc *", "int",
99 SDT_PROBE_DEFINE4(proc, kernel, dtor, entry, "struct proc *", "int",
100 "void *", "struct thread *");
101 SDT_PROBE_DEFINE3(proc, kernel, dtor, return, "struct proc *", "int",
103 SDT_PROBE_DEFINE3(proc, kernel, init, entry, "struct proc *", "int",
105 SDT_PROBE_DEFINE3(proc, kernel, init, return, "struct proc *", "int",
108 MALLOC_DEFINE(M_PGRP, "pgrp", "process group header");
109 MALLOC_DEFINE(M_SESSION, "session", "session header");
110 static MALLOC_DEFINE(M_PROC, "proc", "Proc structures");
111 MALLOC_DEFINE(M_SUBPROC, "subproc", "Proc sub-structures");
113 static void doenterpgrp(struct proc *, struct pgrp *);
114 static void orphanpg(struct pgrp *pg);
115 static void fill_kinfo_aggregate(struct proc *p, struct kinfo_proc *kp);
116 static void fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp);
117 static void fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp,
119 static void pgadjustjobc(struct pgrp *pgrp, int entering);
120 static void pgdelete(struct pgrp *);
121 static int proc_ctor(void *mem, int size, void *arg, int flags);
122 static void proc_dtor(void *mem, int size, void *arg);
123 static int proc_init(void *mem, int size, int flags);
124 static void proc_fini(void *mem, int size);
125 static void pargs_free(struct pargs *pa);
126 static struct proc *zpfind_locked(pid_t pid);
129 * Other process lists
131 struct pidhashhead *pidhashtbl;
133 struct pgrphashhead *pgrphashtbl;
135 struct proclist allproc;
136 struct proclist zombproc;
137 struct sx allproc_lock;
138 struct sx proctree_lock;
139 struct mtx ppeers_lock;
140 uma_zone_t proc_zone;
142 int kstack_pages = KSTACK_PAGES;
143 SYSCTL_INT(_kern, OID_AUTO, kstack_pages, CTLFLAG_RD, &kstack_pages, 0,
144 "Kernel stack size in pages");
145 static int vmmap_skip_res_cnt = 0;
146 SYSCTL_INT(_kern, OID_AUTO, proc_vmmap_skip_resident_count, CTLFLAG_RW,
147 &vmmap_skip_res_cnt, 0,
148 "Skip calculation of the pages resident count in kern.proc.vmmap");
150 CTASSERT(sizeof(struct kinfo_proc) == KINFO_PROC_SIZE);
151 #ifdef COMPAT_FREEBSD32
152 CTASSERT(sizeof(struct kinfo_proc32) == KINFO_PROC32_SIZE);
156 * Initialize global process hashing structures.
162 sx_init(&allproc_lock, "allproc");
163 sx_init(&proctree_lock, "proctree");
164 mtx_init(&ppeers_lock, "p_peers", NULL, MTX_DEF);
166 LIST_INIT(&zombproc);
167 pidhashtbl = hashinit(maxproc / 4, M_PROC, &pidhash);
168 pgrphashtbl = hashinit(maxproc / 4, M_PROC, &pgrphash);
169 proc_zone = uma_zcreate("PROC", sched_sizeof_proc(),
170 proc_ctor, proc_dtor, proc_init, proc_fini,
171 UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
176 * Prepare a proc for use.
179 proc_ctor(void *mem, int size, void *arg, int flags)
183 p = (struct proc *)mem;
184 SDT_PROBE(proc, kernel, ctor , entry, p, size, arg, flags, 0);
185 EVENTHANDLER_INVOKE(process_ctor, p);
186 SDT_PROBE(proc, kernel, ctor , return, p, size, arg, flags, 0);
191 * Reclaim a proc after use.
194 proc_dtor(void *mem, int size, void *arg)
199 /* INVARIANTS checks go here */
200 p = (struct proc *)mem;
201 td = FIRST_THREAD_IN_PROC(p);
202 SDT_PROBE(proc, kernel, dtor, entry, p, size, arg, td, 0);
205 KASSERT((p->p_numthreads == 1),
206 ("bad number of threads in exiting process"));
207 KASSERT(STAILQ_EMPTY(&p->p_ktr), ("proc_dtor: non-empty p_ktr"));
209 /* Free all OSD associated to this thread. */
212 EVENTHANDLER_INVOKE(process_dtor, p);
213 if (p->p_ksi != NULL)
214 KASSERT(! KSI_ONQ(p->p_ksi), ("SIGCHLD queue"));
215 SDT_PROBE(proc, kernel, dtor, return, p, size, arg, 0, 0);
219 * Initialize type-stable parts of a proc (when newly created).
222 proc_init(void *mem, int size, int flags)
226 p = (struct proc *)mem;
227 SDT_PROBE(proc, kernel, init, entry, p, size, flags, 0, 0);
228 p->p_sched = (struct p_sched *)&p[1];
229 bzero(&p->p_mtx, sizeof(struct mtx));
230 mtx_init(&p->p_mtx, "process lock", NULL, MTX_DEF | MTX_DUPOK);
231 mtx_init(&p->p_slock, "process slock", NULL, MTX_SPIN | MTX_RECURSE);
232 cv_init(&p->p_pwait, "ppwait");
233 cv_init(&p->p_dbgwait, "dbgwait");
234 TAILQ_INIT(&p->p_threads); /* all threads in proc */
235 EVENTHANDLER_INVOKE(process_init, p);
236 p->p_stats = pstats_alloc();
237 SDT_PROBE(proc, kernel, init, return, p, size, flags, 0, 0);
242 * UMA should ensure that this function is never called.
243 * Freeing a proc structure would violate type stability.
246 proc_fini(void *mem, int size)
251 p = (struct proc *)mem;
252 EVENTHANDLER_INVOKE(process_fini, p);
253 pstats_free(p->p_stats);
254 thread_free(FIRST_THREAD_IN_PROC(p));
255 mtx_destroy(&p->p_mtx);
256 if (p->p_ksi != NULL)
257 ksiginfo_free(p->p_ksi);
259 panic("proc reclaimed");
264 * Is p an inferior of the current process?
267 inferior(struct proc *p)
270 sx_assert(&proctree_lock, SX_LOCKED);
271 PROC_LOCK_ASSERT(p, MA_OWNED);
272 for (; p != curproc; p = proc_realparent(p)) {
280 pfind_locked(pid_t pid)
284 sx_assert(&allproc_lock, SX_LOCKED);
285 LIST_FOREACH(p, PIDHASH(pid), p_hash) {
286 if (p->p_pid == pid) {
288 if (p->p_state == PRS_NEW) {
299 * Locate a process by number; return only "live" processes -- i.e., neither
300 * zombies nor newly born but incompletely initialized processes. By not
301 * returning processes in the PRS_NEW state, we allow callers to avoid
302 * testing for that condition to avoid dereferencing p_ucred, et al.
309 sx_slock(&allproc_lock);
310 p = pfind_locked(pid);
311 sx_sunlock(&allproc_lock);
316 pfind_tid_locked(pid_t tid)
321 sx_assert(&allproc_lock, SX_LOCKED);
322 FOREACH_PROC_IN_SYSTEM(p) {
324 if (p->p_state == PRS_NEW) {
328 FOREACH_THREAD_IN_PROC(p, td) {
329 if (td->td_tid == tid)
339 * Locate a process group by number.
340 * The caller must hold proctree_lock.
346 register struct pgrp *pgrp;
348 sx_assert(&proctree_lock, SX_LOCKED);
350 LIST_FOREACH(pgrp, PGRPHASH(pgid), pg_hash) {
351 if (pgrp->pg_id == pgid) {
360 * Locate process and do additional manipulations, depending on flags.
363 pget(pid_t pid, int flags, struct proc **pp)
368 sx_slock(&allproc_lock);
369 if (pid <= PID_MAX) {
370 p = pfind_locked(pid);
371 if (p == NULL && (flags & PGET_NOTWEXIT) == 0)
372 p = zpfind_locked(pid);
373 } else if ((flags & PGET_NOTID) == 0) {
374 p = pfind_tid_locked(pid);
378 sx_sunlock(&allproc_lock);
381 if ((flags & PGET_CANSEE) != 0) {
382 error = p_cansee(curthread, p);
386 if ((flags & PGET_CANDEBUG) != 0) {
387 error = p_candebug(curthread, p);
391 if ((flags & PGET_ISCURRENT) != 0 && curproc != p) {
395 if ((flags & PGET_NOTWEXIT) != 0 && (p->p_flag & P_WEXIT) != 0) {
399 if ((flags & PGET_NOTINEXEC) != 0 && (p->p_flag & P_INEXEC) != 0) {
401 * XXXRW: Not clear ESRCH is the right error during proc
407 if ((flags & PGET_HOLD) != 0) {
419 * Create a new process group.
420 * pgid must be equal to the pid of p.
421 * Begin a new session if required.
424 enterpgrp(p, pgid, pgrp, sess)
425 register struct proc *p;
428 struct session *sess;
431 sx_assert(&proctree_lock, SX_XLOCKED);
433 KASSERT(pgrp != NULL, ("enterpgrp: pgrp == NULL"));
434 KASSERT(p->p_pid == pgid,
435 ("enterpgrp: new pgrp and pid != pgid"));
436 KASSERT(pgfind(pgid) == NULL,
437 ("enterpgrp: pgrp with pgid exists"));
438 KASSERT(!SESS_LEADER(p),
439 ("enterpgrp: session leader attempted setpgrp"));
441 mtx_init(&pgrp->pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK);
447 mtx_init(&sess->s_mtx, "session", NULL, MTX_DEF);
449 p->p_flag &= ~P_CONTROLT;
453 sess->s_sid = p->p_pid;
454 refcount_init(&sess->s_count, 1);
455 sess->s_ttyvp = NULL;
456 sess->s_ttydp = NULL;
458 bcopy(p->p_session->s_login, sess->s_login,
459 sizeof(sess->s_login));
460 pgrp->pg_session = sess;
461 KASSERT(p == curproc,
462 ("enterpgrp: mksession and p != curproc"));
464 pgrp->pg_session = p->p_session;
465 sess_hold(pgrp->pg_session);
469 LIST_INIT(&pgrp->pg_members);
472 * As we have an exclusive lock of proctree_lock,
473 * this should not deadlock.
475 LIST_INSERT_HEAD(PGRPHASH(pgid), pgrp, pg_hash);
477 SLIST_INIT(&pgrp->pg_sigiolst);
480 doenterpgrp(p, pgrp);
486 * Move p to an existing process group
489 enterthispgrp(p, pgrp)
490 register struct proc *p;
494 sx_assert(&proctree_lock, SX_XLOCKED);
495 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
496 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
497 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
498 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
499 KASSERT(pgrp->pg_session == p->p_session,
500 ("%s: pgrp's session %p, p->p_session %p.\n",
504 KASSERT(pgrp != p->p_pgrp,
505 ("%s: p belongs to pgrp.", __func__));
507 doenterpgrp(p, pgrp);
513 * Move p to a process group
520 struct pgrp *savepgrp;
522 sx_assert(&proctree_lock, SX_XLOCKED);
523 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
524 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
525 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
526 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
528 savepgrp = p->p_pgrp;
531 * Adjust eligibility of affected pgrps to participate in job control.
532 * Increment eligibility counts before decrementing, otherwise we
533 * could reach 0 spuriously during the first call.
536 fixjobc(p, p->p_pgrp, 0);
541 LIST_REMOVE(p, p_pglist);
544 LIST_INSERT_HEAD(&pgrp->pg_members, p, p_pglist);
545 PGRP_UNLOCK(savepgrp);
547 if (LIST_EMPTY(&savepgrp->pg_members))
552 * remove process from process group
556 register struct proc *p;
558 struct pgrp *savepgrp;
560 sx_assert(&proctree_lock, SX_XLOCKED);
561 savepgrp = p->p_pgrp;
564 LIST_REMOVE(p, p_pglist);
567 PGRP_UNLOCK(savepgrp);
568 if (LIST_EMPTY(&savepgrp->pg_members))
574 * delete a process group
578 register struct pgrp *pgrp;
580 struct session *savesess;
583 sx_assert(&proctree_lock, SX_XLOCKED);
584 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
585 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
588 * Reset any sigio structures pointing to us as a result of
589 * F_SETOWN with our pgid.
591 funsetownlst(&pgrp->pg_sigiolst);
594 tp = pgrp->pg_session->s_ttyp;
595 LIST_REMOVE(pgrp, pg_hash);
596 savesess = pgrp->pg_session;
599 /* Remove the reference to the pgrp before deallocating it. */
602 tty_rel_pgrp(tp, pgrp);
605 mtx_destroy(&pgrp->pg_mtx);
607 sess_release(savesess);
611 pgadjustjobc(pgrp, entering)
621 if (pgrp->pg_jobc == 0)
628 * Adjust pgrp jobc counters when specified process changes process group.
629 * We count the number of processes in each process group that "qualify"
630 * the group for terminal job control (those with a parent in a different
631 * process group of the same session). If that count reaches zero, the
632 * process group becomes orphaned. Check both the specified process'
633 * process group and that of its children.
634 * entering == 0 => p is leaving specified group.
635 * entering == 1 => p is entering specified group.
638 fixjobc(p, pgrp, entering)
639 register struct proc *p;
640 register struct pgrp *pgrp;
643 register struct pgrp *hispgrp;
644 register struct session *mysession;
646 sx_assert(&proctree_lock, SX_LOCKED);
647 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
648 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
649 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
652 * Check p's parent to see whether p qualifies its own process
653 * group; if so, adjust count for p's process group.
655 mysession = pgrp->pg_session;
656 if ((hispgrp = p->p_pptr->p_pgrp) != pgrp &&
657 hispgrp->pg_session == mysession)
658 pgadjustjobc(pgrp, entering);
661 * Check this process' children to see whether they qualify
662 * their process groups; if so, adjust counts for children's
665 LIST_FOREACH(p, &p->p_children, p_sibling) {
667 if (hispgrp == pgrp ||
668 hispgrp->pg_session != mysession)
671 if (p->p_state == PRS_ZOMBIE) {
676 pgadjustjobc(hispgrp, entering);
681 * A process group has become orphaned;
682 * if there are any stopped processes in the group,
683 * hang-up all process in that group.
689 register struct proc *p;
691 PGRP_LOCK_ASSERT(pg, MA_OWNED);
693 LIST_FOREACH(p, &pg->pg_members, p_pglist) {
695 if (P_SHOULDSTOP(p)) {
697 LIST_FOREACH(p, &pg->pg_members, p_pglist) {
699 kern_psignal(p, SIGHUP);
700 kern_psignal(p, SIGCONT);
710 sess_hold(struct session *s)
713 refcount_acquire(&s->s_count);
717 sess_release(struct session *s)
720 if (refcount_release(&s->s_count)) {
721 if (s->s_ttyp != NULL) {
723 tty_rel_sess(s->s_ttyp, s);
725 mtx_destroy(&s->s_mtx);
732 DB_SHOW_COMMAND(pgrpdump, pgrpdump)
734 register struct pgrp *pgrp;
735 register struct proc *p;
738 for (i = 0; i <= pgrphash; i++) {
739 if (!LIST_EMPTY(&pgrphashtbl[i])) {
740 printf("\tindx %d\n", i);
741 LIST_FOREACH(pgrp, &pgrphashtbl[i], pg_hash) {
743 "\tpgrp %p, pgid %ld, sess %p, sesscnt %d, mem %p\n",
744 (void *)pgrp, (long)pgrp->pg_id,
745 (void *)pgrp->pg_session,
746 pgrp->pg_session->s_count,
747 (void *)LIST_FIRST(&pgrp->pg_members));
748 LIST_FOREACH(p, &pgrp->pg_members, p_pglist) {
749 printf("\t\tpid %ld addr %p pgrp %p\n",
750 (long)p->p_pid, (void *)p,
760 * Calculate the kinfo_proc members which contain process-wide
762 * Must be called with the target process locked.
765 fill_kinfo_aggregate(struct proc *p, struct kinfo_proc *kp)
769 PROC_LOCK_ASSERT(p, MA_OWNED);
773 FOREACH_THREAD_IN_PROC(p, td) {
775 kp->ki_pctcpu += sched_pctcpu(td);
776 kp->ki_estcpu += td->td_estcpu;
782 * Clear kinfo_proc and fill in any information that is common
783 * to all threads in the process.
784 * Must be called with the target process locked.
787 fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp)
795 PROC_LOCK_ASSERT(p, MA_OWNED);
796 bzero(kp, sizeof(*kp));
798 kp->ki_structsize = sizeof(*kp);
800 kp->ki_addr =/* p->p_addr; */0; /* XXX */
801 kp->ki_args = p->p_args;
802 kp->ki_textvp = p->p_textvp;
804 kp->ki_tracep = p->p_tracevp;
805 kp->ki_traceflag = p->p_traceflag;
808 kp->ki_vmspace = p->p_vmspace;
809 kp->ki_flag = p->p_flag;
810 kp->ki_flag2 = p->p_flag2;
813 kp->ki_uid = cred->cr_uid;
814 kp->ki_ruid = cred->cr_ruid;
815 kp->ki_svuid = cred->cr_svuid;
817 if (cred->cr_flags & CRED_FLAG_CAPMODE)
818 kp->ki_cr_flags |= KI_CRF_CAPABILITY_MODE;
819 /* XXX bde doesn't like KI_NGROUPS */
820 if (cred->cr_ngroups > KI_NGROUPS) {
821 kp->ki_ngroups = KI_NGROUPS;
822 kp->ki_cr_flags |= KI_CRF_GRP_OVERFLOW;
824 kp->ki_ngroups = cred->cr_ngroups;
825 bcopy(cred->cr_groups, kp->ki_groups,
826 kp->ki_ngroups * sizeof(gid_t));
827 kp->ki_rgid = cred->cr_rgid;
828 kp->ki_svgid = cred->cr_svgid;
829 /* If jailed(cred), emulate the old P_JAILED flag. */
831 kp->ki_flag |= P_JAILED;
832 /* If inside the jail, use 0 as a jail ID. */
833 if (cred->cr_prison != curthread->td_ucred->cr_prison)
834 kp->ki_jid = cred->cr_prison->pr_id;
836 strlcpy(kp->ki_loginclass, cred->cr_loginclass->lc_name,
837 sizeof(kp->ki_loginclass));
841 mtx_lock(&ps->ps_mtx);
842 kp->ki_sigignore = ps->ps_sigignore;
843 kp->ki_sigcatch = ps->ps_sigcatch;
844 mtx_unlock(&ps->ps_mtx);
846 if (p->p_state != PRS_NEW &&
847 p->p_state != PRS_ZOMBIE &&
848 p->p_vmspace != NULL) {
849 struct vmspace *vm = p->p_vmspace;
851 kp->ki_size = vm->vm_map.size;
852 kp->ki_rssize = vmspace_resident_count(vm); /*XXX*/
853 FOREACH_THREAD_IN_PROC(p, td0) {
854 if (!TD_IS_SWAPPED(td0))
855 kp->ki_rssize += td0->td_kstack_pages;
857 kp->ki_swrss = vm->vm_swrss;
858 kp->ki_tsize = vm->vm_tsize;
859 kp->ki_dsize = vm->vm_dsize;
860 kp->ki_ssize = vm->vm_ssize;
861 } else if (p->p_state == PRS_ZOMBIE)
863 if (kp->ki_flag & P_INMEM)
864 kp->ki_sflag = PS_INMEM;
867 /* Calculate legacy swtime as seconds since 'swtick'. */
868 kp->ki_swtime = (ticks - p->p_swtick) / hz;
869 kp->ki_pid = p->p_pid;
870 kp->ki_nice = p->p_nice;
871 kp->ki_fibnum = p->p_fibnum;
872 kp->ki_start = p->p_stats->p_start;
873 timevaladd(&kp->ki_start, &boottime);
875 rufetch(p, &kp->ki_rusage);
876 kp->ki_runtime = cputick2usec(p->p_rux.rux_runtime);
877 calcru(p, &kp->ki_rusage.ru_utime, &kp->ki_rusage.ru_stime);
879 calccru(p, &kp->ki_childutime, &kp->ki_childstime);
880 /* Some callers want child times in a single value. */
881 kp->ki_childtime = kp->ki_childstime;
882 timevaladd(&kp->ki_childtime, &kp->ki_childutime);
884 FOREACH_THREAD_IN_PROC(p, td0)
885 kp->ki_cow += td0->td_cow;
889 kp->ki_pgid = p->p_pgrp->pg_id;
890 kp->ki_jobc = p->p_pgrp->pg_jobc;
891 sp = p->p_pgrp->pg_session;
894 kp->ki_sid = sp->s_sid;
896 strlcpy(kp->ki_login, sp->s_login,
897 sizeof(kp->ki_login));
899 kp->ki_kiflag |= KI_CTTY;
901 kp->ki_kiflag |= KI_SLEADER;
902 /* XXX proctree_lock */
907 if ((p->p_flag & P_CONTROLT) && tp != NULL) {
908 kp->ki_tdev = tty_udev(tp);
909 kp->ki_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
911 kp->ki_tsid = tp->t_session->s_sid;
914 if (p->p_comm[0] != '\0')
915 strlcpy(kp->ki_comm, p->p_comm, sizeof(kp->ki_comm));
916 if (p->p_sysent && p->p_sysent->sv_name != NULL &&
917 p->p_sysent->sv_name[0] != '\0')
918 strlcpy(kp->ki_emul, p->p_sysent->sv_name, sizeof(kp->ki_emul));
919 kp->ki_siglist = p->p_siglist;
920 kp->ki_xstat = p->p_xstat;
921 kp->ki_acflag = p->p_acflag;
922 kp->ki_lock = p->p_lock;
924 kp->ki_ppid = p->p_pptr->p_pid;
928 * Fill in information that is thread specific. Must be called with
929 * target process locked. If 'preferthread' is set, overwrite certain
930 * process-related fields that are maintained for both threads and
934 fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp, int preferthread)
940 PROC_LOCK_ASSERT(p, MA_OWNED);
945 if (td->td_wmesg != NULL)
946 strlcpy(kp->ki_wmesg, td->td_wmesg, sizeof(kp->ki_wmesg));
948 bzero(kp->ki_wmesg, sizeof(kp->ki_wmesg));
949 strlcpy(kp->ki_tdname, td->td_name, sizeof(kp->ki_tdname));
950 if (TD_ON_LOCK(td)) {
951 kp->ki_kiflag |= KI_LOCKBLOCK;
952 strlcpy(kp->ki_lockname, td->td_lockname,
953 sizeof(kp->ki_lockname));
955 kp->ki_kiflag &= ~KI_LOCKBLOCK;
956 bzero(kp->ki_lockname, sizeof(kp->ki_lockname));
959 if (p->p_state == PRS_NORMAL) { /* approximate. */
960 if (TD_ON_RUNQ(td) ||
964 } else if (P_SHOULDSTOP(p)) {
966 } else if (TD_IS_SLEEPING(td)) {
967 kp->ki_stat = SSLEEP;
968 } else if (TD_ON_LOCK(td)) {
973 } else if (p->p_state == PRS_ZOMBIE) {
979 /* Things in the thread */
980 kp->ki_wchan = td->td_wchan;
981 kp->ki_pri.pri_level = td->td_priority;
982 kp->ki_pri.pri_native = td->td_base_pri;
983 kp->ki_lastcpu = td->td_lastcpu;
984 kp->ki_oncpu = td->td_oncpu;
985 kp->ki_tdflags = td->td_flags;
986 kp->ki_tid = td->td_tid;
987 kp->ki_numthreads = p->p_numthreads;
988 kp->ki_pcb = td->td_pcb;
989 kp->ki_kstack = (void *)td->td_kstack;
990 kp->ki_slptime = (ticks - td->td_slptick) / hz;
991 kp->ki_pri.pri_class = td->td_pri_class;
992 kp->ki_pri.pri_user = td->td_user_pri;
995 rufetchtd(td, &kp->ki_rusage);
996 kp->ki_runtime = cputick2usec(td->td_rux.rux_runtime);
997 kp->ki_pctcpu = sched_pctcpu(td);
998 kp->ki_estcpu = td->td_estcpu;
999 kp->ki_cow = td->td_cow;
1002 /* We can't get this anymore but ps etc never used it anyway. */
1006 kp->ki_siglist = td->td_siglist;
1007 kp->ki_sigmask = td->td_sigmask;
1014 * Fill in a kinfo_proc structure for the specified process.
1015 * Must be called with the target process locked.
1018 fill_kinfo_proc(struct proc *p, struct kinfo_proc *kp)
1021 MPASS(FIRST_THREAD_IN_PROC(p) != NULL);
1023 fill_kinfo_proc_only(p, kp);
1024 fill_kinfo_thread(FIRST_THREAD_IN_PROC(p), kp, 0);
1025 fill_kinfo_aggregate(p, kp);
1032 return (malloc(sizeof(struct pstats), M_SUBPROC, M_ZERO|M_WAITOK));
1036 * Copy parts of p_stats; zero the rest of p_stats (statistics).
1039 pstats_fork(struct pstats *src, struct pstats *dst)
1042 bzero(&dst->pstat_startzero,
1043 __rangeof(struct pstats, pstat_startzero, pstat_endzero));
1044 bcopy(&src->pstat_startcopy, &dst->pstat_startcopy,
1045 __rangeof(struct pstats, pstat_startcopy, pstat_endcopy));
1049 pstats_free(struct pstats *ps)
1052 free(ps, M_SUBPROC);
1055 static struct proc *
1056 zpfind_locked(pid_t pid)
1060 sx_assert(&allproc_lock, SX_LOCKED);
1061 LIST_FOREACH(p, &zombproc, p_list) {
1062 if (p->p_pid == pid) {
1071 * Locate a zombie process by number
1078 sx_slock(&allproc_lock);
1079 p = zpfind_locked(pid);
1080 sx_sunlock(&allproc_lock);
1084 #ifdef COMPAT_FREEBSD32
1087 * This function is typically used to copy out the kernel address, so
1088 * it can be replaced by assignment of zero.
1090 static inline uint32_t
1091 ptr32_trim(void *ptr)
1095 uptr = (uintptr_t)ptr;
1096 return ((uptr > UINT_MAX) ? 0 : uptr);
1099 #define PTRTRIM_CP(src,dst,fld) \
1100 do { (dst).fld = ptr32_trim((src).fld); } while (0)
1103 freebsd32_kinfo_proc_out(const struct kinfo_proc *ki, struct kinfo_proc32 *ki32)
1107 bzero(ki32, sizeof(struct kinfo_proc32));
1108 ki32->ki_structsize = sizeof(struct kinfo_proc32);
1109 CP(*ki, *ki32, ki_layout);
1110 PTRTRIM_CP(*ki, *ki32, ki_args);
1111 PTRTRIM_CP(*ki, *ki32, ki_paddr);
1112 PTRTRIM_CP(*ki, *ki32, ki_addr);
1113 PTRTRIM_CP(*ki, *ki32, ki_tracep);
1114 PTRTRIM_CP(*ki, *ki32, ki_textvp);
1115 PTRTRIM_CP(*ki, *ki32, ki_fd);
1116 PTRTRIM_CP(*ki, *ki32, ki_vmspace);
1117 PTRTRIM_CP(*ki, *ki32, ki_wchan);
1118 CP(*ki, *ki32, ki_pid);
1119 CP(*ki, *ki32, ki_ppid);
1120 CP(*ki, *ki32, ki_pgid);
1121 CP(*ki, *ki32, ki_tpgid);
1122 CP(*ki, *ki32, ki_sid);
1123 CP(*ki, *ki32, ki_tsid);
1124 CP(*ki, *ki32, ki_jobc);
1125 CP(*ki, *ki32, ki_tdev);
1126 CP(*ki, *ki32, ki_siglist);
1127 CP(*ki, *ki32, ki_sigmask);
1128 CP(*ki, *ki32, ki_sigignore);
1129 CP(*ki, *ki32, ki_sigcatch);
1130 CP(*ki, *ki32, ki_uid);
1131 CP(*ki, *ki32, ki_ruid);
1132 CP(*ki, *ki32, ki_svuid);
1133 CP(*ki, *ki32, ki_rgid);
1134 CP(*ki, *ki32, ki_svgid);
1135 CP(*ki, *ki32, ki_ngroups);
1136 for (i = 0; i < KI_NGROUPS; i++)
1137 CP(*ki, *ki32, ki_groups[i]);
1138 CP(*ki, *ki32, ki_size);
1139 CP(*ki, *ki32, ki_rssize);
1140 CP(*ki, *ki32, ki_swrss);
1141 CP(*ki, *ki32, ki_tsize);
1142 CP(*ki, *ki32, ki_dsize);
1143 CP(*ki, *ki32, ki_ssize);
1144 CP(*ki, *ki32, ki_xstat);
1145 CP(*ki, *ki32, ki_acflag);
1146 CP(*ki, *ki32, ki_pctcpu);
1147 CP(*ki, *ki32, ki_estcpu);
1148 CP(*ki, *ki32, ki_slptime);
1149 CP(*ki, *ki32, ki_swtime);
1150 CP(*ki, *ki32, ki_cow);
1151 CP(*ki, *ki32, ki_runtime);
1152 TV_CP(*ki, *ki32, ki_start);
1153 TV_CP(*ki, *ki32, ki_childtime);
1154 CP(*ki, *ki32, ki_flag);
1155 CP(*ki, *ki32, ki_kiflag);
1156 CP(*ki, *ki32, ki_traceflag);
1157 CP(*ki, *ki32, ki_stat);
1158 CP(*ki, *ki32, ki_nice);
1159 CP(*ki, *ki32, ki_lock);
1160 CP(*ki, *ki32, ki_rqindex);
1161 CP(*ki, *ki32, ki_oncpu);
1162 CP(*ki, *ki32, ki_lastcpu);
1163 bcopy(ki->ki_tdname, ki32->ki_tdname, TDNAMLEN + 1);
1164 bcopy(ki->ki_wmesg, ki32->ki_wmesg, WMESGLEN + 1);
1165 bcopy(ki->ki_login, ki32->ki_login, LOGNAMELEN + 1);
1166 bcopy(ki->ki_lockname, ki32->ki_lockname, LOCKNAMELEN + 1);
1167 bcopy(ki->ki_comm, ki32->ki_comm, COMMLEN + 1);
1168 bcopy(ki->ki_emul, ki32->ki_emul, KI_EMULNAMELEN + 1);
1169 bcopy(ki->ki_loginclass, ki32->ki_loginclass, LOGINCLASSLEN + 1);
1170 CP(*ki, *ki32, ki_flag2);
1171 CP(*ki, *ki32, ki_fibnum);
1172 CP(*ki, *ki32, ki_cr_flags);
1173 CP(*ki, *ki32, ki_jid);
1174 CP(*ki, *ki32, ki_numthreads);
1175 CP(*ki, *ki32, ki_tid);
1176 CP(*ki, *ki32, ki_pri);
1177 freebsd32_rusage_out(&ki->ki_rusage, &ki32->ki_rusage);
1178 freebsd32_rusage_out(&ki->ki_rusage_ch, &ki32->ki_rusage_ch);
1179 PTRTRIM_CP(*ki, *ki32, ki_pcb);
1180 PTRTRIM_CP(*ki, *ki32, ki_kstack);
1181 PTRTRIM_CP(*ki, *ki32, ki_udata);
1182 CP(*ki, *ki32, ki_sflag);
1183 CP(*ki, *ki32, ki_tdflags);
1188 kern_proc_out(struct proc *p, struct sbuf *sb, int flags)
1191 struct kinfo_proc ki;
1192 #ifdef COMPAT_FREEBSD32
1193 struct kinfo_proc32 ki32;
1197 PROC_LOCK_ASSERT(p, MA_OWNED);
1198 MPASS(FIRST_THREAD_IN_PROC(p) != NULL);
1201 fill_kinfo_proc(p, &ki);
1202 if ((flags & KERN_PROC_NOTHREADS) != 0) {
1203 #ifdef COMPAT_FREEBSD32
1204 if ((flags & KERN_PROC_MASK32) != 0) {
1205 freebsd32_kinfo_proc_out(&ki, &ki32);
1206 if (sbuf_bcat(sb, &ki32, sizeof(ki32)) != 0)
1210 if (sbuf_bcat(sb, &ki, sizeof(ki)) != 0)
1213 FOREACH_THREAD_IN_PROC(p, td) {
1214 fill_kinfo_thread(td, &ki, 1);
1215 #ifdef COMPAT_FREEBSD32
1216 if ((flags & KERN_PROC_MASK32) != 0) {
1217 freebsd32_kinfo_proc_out(&ki, &ki32);
1218 if (sbuf_bcat(sb, &ki32, sizeof(ki32)) != 0)
1222 if (sbuf_bcat(sb, &ki, sizeof(ki)) != 0)
1233 sysctl_out_proc(struct proc *p, struct sysctl_req *req, int flags,
1237 struct kinfo_proc ki;
1243 sbuf_new_for_sysctl(&sb, (char *)&ki, sizeof(ki), req);
1244 error = kern_proc_out(p, &sb, flags);
1245 error2 = sbuf_finish(&sb);
1249 else if (error2 != 0)
1269 sysctl_kern_proc(SYSCTL_HANDLER_ARGS)
1271 int *name = (int *)arg1;
1272 u_int namelen = arg2;
1274 int flags, doingzomb, oid_number;
1277 oid_number = oidp->oid_number;
1278 if (oid_number != KERN_PROC_ALL &&
1279 (oid_number & KERN_PROC_INC_THREAD) == 0)
1280 flags = KERN_PROC_NOTHREADS;
1283 oid_number &= ~KERN_PROC_INC_THREAD;
1285 #ifdef COMPAT_FREEBSD32
1286 if (req->flags & SCTL_MASK32)
1287 flags |= KERN_PROC_MASK32;
1289 if (oid_number == KERN_PROC_PID) {
1292 error = sysctl_wire_old_buffer(req, 0);
1295 error = pget((pid_t)name[0], PGET_CANSEE, &p);
1298 error = sysctl_out_proc(p, req, flags, 0);
1302 switch (oid_number) {
1307 case KERN_PROC_PROC:
1308 if (namelen != 0 && namelen != 1)
1318 /* overestimate by 5 procs */
1319 error = SYSCTL_OUT(req, 0, sizeof (struct kinfo_proc) * 5);
1323 error = sysctl_wire_old_buffer(req, 0);
1326 sx_slock(&allproc_lock);
1327 for (doingzomb=0 ; doingzomb < 2 ; doingzomb++) {
1329 p = LIST_FIRST(&allproc);
1331 p = LIST_FIRST(&zombproc);
1332 for (; p != 0; p = LIST_NEXT(p, p_list)) {
1334 * Skip embryonic processes.
1337 if (p->p_state == PRS_NEW) {
1341 KASSERT(p->p_ucred != NULL,
1342 ("process credential is NULL for non-NEW proc"));
1344 * Show a user only appropriate processes.
1346 if (p_cansee(curthread, p)) {
1351 * TODO - make more efficient (see notes below).
1354 switch (oid_number) {
1357 if (p->p_ucred->cr_gid != (gid_t)name[0]) {
1363 case KERN_PROC_PGRP:
1364 /* could do this by traversing pgrp */
1365 if (p->p_pgrp == NULL ||
1366 p->p_pgrp->pg_id != (pid_t)name[0]) {
1372 case KERN_PROC_RGID:
1373 if (p->p_ucred->cr_rgid != (gid_t)name[0]) {
1379 case KERN_PROC_SESSION:
1380 if (p->p_session == NULL ||
1381 p->p_session->s_sid != (pid_t)name[0]) {
1388 if ((p->p_flag & P_CONTROLT) == 0 ||
1389 p->p_session == NULL) {
1393 /* XXX proctree_lock */
1394 SESS_LOCK(p->p_session);
1395 if (p->p_session->s_ttyp == NULL ||
1396 tty_udev(p->p_session->s_ttyp) !=
1398 SESS_UNLOCK(p->p_session);
1402 SESS_UNLOCK(p->p_session);
1406 if (p->p_ucred->cr_uid != (uid_t)name[0]) {
1412 case KERN_PROC_RUID:
1413 if (p->p_ucred->cr_ruid != (uid_t)name[0]) {
1419 case KERN_PROC_PROC:
1427 error = sysctl_out_proc(p, req, flags, doingzomb);
1429 sx_sunlock(&allproc_lock);
1434 sx_sunlock(&allproc_lock);
1439 pargs_alloc(int len)
1443 pa = malloc(sizeof(struct pargs) + len, M_PARGS,
1445 refcount_init(&pa->ar_ref, 1);
1446 pa->ar_length = len;
1451 pargs_free(struct pargs *pa)
1458 pargs_hold(struct pargs *pa)
1463 refcount_acquire(&pa->ar_ref);
1467 pargs_drop(struct pargs *pa)
1472 if (refcount_release(&pa->ar_ref))
1477 proc_read_mem(struct thread *td, struct proc *p, vm_offset_t offset, void* buf,
1483 iov.iov_base = (caddr_t)buf;
1487 uio.uio_offset = offset;
1488 uio.uio_resid = (ssize_t)len;
1489 uio.uio_segflg = UIO_SYSSPACE;
1490 uio.uio_rw = UIO_READ;
1493 return (proc_rwmem(p, &uio));
1497 proc_read_string(struct thread *td, struct proc *p, const char *sptr, char *buf,
1503 error = proc_read_mem(td, p, (vm_offset_t)sptr, buf, len);
1505 * Reading the chunk may validly return EFAULT if the string is shorter
1506 * than the chunk and is aligned at the end of the page, assuming the
1507 * next page is not mapped. So if EFAULT is returned do a fallback to
1508 * one byte read loop.
1510 if (error == EFAULT) {
1511 for (i = 0; i < len; i++, buf++, sptr++) {
1512 error = proc_read_mem(td, p, (vm_offset_t)sptr, buf, 1);
1523 #define PROC_AUXV_MAX 256 /* Safety limit on auxv size. */
1525 enum proc_vector_type {
1531 #ifdef COMPAT_FREEBSD32
1533 get_proc_vector32(struct thread *td, struct proc *p, char ***proc_vectorp,
1534 size_t *vsizep, enum proc_vector_type type)
1536 struct freebsd32_ps_strings pss;
1538 vm_offset_t vptr, ptr;
1539 uint32_t *proc_vector32;
1544 error = proc_read_mem(td, p, (vm_offset_t)(p->p_sysent->sv_psstrings),
1550 vptr = (vm_offset_t)PTRIN(pss.ps_argvstr);
1551 vsize = pss.ps_nargvstr;
1552 if (vsize > ARG_MAX)
1554 size = vsize * sizeof(int32_t);
1557 vptr = (vm_offset_t)PTRIN(pss.ps_envstr);
1558 vsize = pss.ps_nenvstr;
1559 if (vsize > ARG_MAX)
1561 size = vsize * sizeof(int32_t);
1564 vptr = (vm_offset_t)PTRIN(pss.ps_envstr) +
1565 (pss.ps_nenvstr + 1) * sizeof(int32_t);
1568 for (ptr = vptr, i = 0; i < PROC_AUXV_MAX; i++) {
1569 error = proc_read_mem(td, p, ptr, &aux, sizeof(aux));
1572 if (aux.a_type == AT_NULL)
1576 if (aux.a_type != AT_NULL)
1579 size = vsize * sizeof(aux);
1582 KASSERT(0, ("Wrong proc vector type: %d", type));
1585 proc_vector32 = malloc(size, M_TEMP, M_WAITOK);
1586 error = proc_read_mem(td, p, vptr, proc_vector32, size);
1589 if (type == PROC_AUX) {
1590 *proc_vectorp = (char **)proc_vector32;
1594 proc_vector = malloc(vsize * sizeof(char *), M_TEMP, M_WAITOK);
1595 for (i = 0; i < (int)vsize; i++)
1596 proc_vector[i] = PTRIN(proc_vector32[i]);
1597 *proc_vectorp = proc_vector;
1600 free(proc_vector32, M_TEMP);
1606 get_proc_vector(struct thread *td, struct proc *p, char ***proc_vectorp,
1607 size_t *vsizep, enum proc_vector_type type)
1609 struct ps_strings pss;
1611 vm_offset_t vptr, ptr;
1616 #ifdef COMPAT_FREEBSD32
1617 if (SV_PROC_FLAG(p, SV_ILP32) != 0)
1618 return (get_proc_vector32(td, p, proc_vectorp, vsizep, type));
1620 error = proc_read_mem(td, p, (vm_offset_t)(p->p_sysent->sv_psstrings),
1626 vptr = (vm_offset_t)pss.ps_argvstr;
1627 vsize = pss.ps_nargvstr;
1628 if (vsize > ARG_MAX)
1630 size = vsize * sizeof(char *);
1633 vptr = (vm_offset_t)pss.ps_envstr;
1634 vsize = pss.ps_nenvstr;
1635 if (vsize > ARG_MAX)
1637 size = vsize * sizeof(char *);
1641 * The aux array is just above env array on the stack. Check
1642 * that the address is naturally aligned.
1644 vptr = (vm_offset_t)pss.ps_envstr + (pss.ps_nenvstr + 1)
1646 #if __ELF_WORD_SIZE == 64
1647 if (vptr % sizeof(uint64_t) != 0)
1649 if (vptr % sizeof(uint32_t) != 0)
1653 * We count the array size reading the aux vectors from the
1654 * stack until AT_NULL vector is returned. So (to keep the code
1655 * simple) we read the process stack twice: the first time here
1656 * to find the size and the second time when copying the vectors
1657 * to the allocated proc_vector.
1659 for (ptr = vptr, i = 0; i < PROC_AUXV_MAX; i++) {
1660 error = proc_read_mem(td, p, ptr, &aux, sizeof(aux));
1663 if (aux.a_type == AT_NULL)
1668 * If the PROC_AUXV_MAX entries are iterated over, and we have
1669 * not reached AT_NULL, it is most likely we are reading wrong
1670 * data: either the process doesn't have auxv array or data has
1671 * been modified. Return the error in this case.
1673 if (aux.a_type != AT_NULL)
1676 size = vsize * sizeof(aux);
1679 KASSERT(0, ("Wrong proc vector type: %d", type));
1680 return (EINVAL); /* In case we are built without INVARIANTS. */
1682 proc_vector = malloc(size, M_TEMP, M_WAITOK);
1683 if (proc_vector == NULL)
1685 error = proc_read_mem(td, p, vptr, proc_vector, size);
1687 free(proc_vector, M_TEMP);
1690 *proc_vectorp = proc_vector;
1696 #define GET_PS_STRINGS_CHUNK_SZ 256 /* Chunk size (bytes) for ps_strings operations. */
1699 get_ps_strings(struct thread *td, struct proc *p, struct sbuf *sb,
1700 enum proc_vector_type type)
1702 size_t done, len, nchr, vsize;
1704 char **proc_vector, *sptr;
1705 char pss_string[GET_PS_STRINGS_CHUNK_SZ];
1707 PROC_ASSERT_HELD(p);
1710 * We are not going to read more than 2 * (PATH_MAX + ARG_MAX) bytes.
1712 nchr = 2 * (PATH_MAX + ARG_MAX);
1714 error = get_proc_vector(td, p, &proc_vector, &vsize, type);
1717 for (done = 0, i = 0; i < (int)vsize && done < nchr; i++) {
1719 * The program may have scribbled into its argv array, e.g. to
1720 * remove some arguments. If that has happened, break out
1721 * before trying to read from NULL.
1723 if (proc_vector[i] == NULL)
1725 for (sptr = proc_vector[i]; ; sptr += GET_PS_STRINGS_CHUNK_SZ) {
1726 error = proc_read_string(td, p, sptr, pss_string,
1727 sizeof(pss_string));
1730 len = strnlen(pss_string, GET_PS_STRINGS_CHUNK_SZ);
1731 if (done + len >= nchr)
1732 len = nchr - done - 1;
1733 sbuf_bcat(sb, pss_string, len);
1734 if (len != GET_PS_STRINGS_CHUNK_SZ)
1736 done += GET_PS_STRINGS_CHUNK_SZ;
1738 sbuf_bcat(sb, "", 1);
1742 free(proc_vector, M_TEMP);
1747 proc_getargv(struct thread *td, struct proc *p, struct sbuf *sb)
1750 return (get_ps_strings(curthread, p, sb, PROC_ARG));
1754 proc_getenvv(struct thread *td, struct proc *p, struct sbuf *sb)
1757 return (get_ps_strings(curthread, p, sb, PROC_ENV));
1761 proc_getauxv(struct thread *td, struct proc *p, struct sbuf *sb)
1767 error = get_proc_vector(td, p, &auxv, &vsize, PROC_AUX);
1769 #ifdef COMPAT_FREEBSD32
1770 if (SV_PROC_FLAG(p, SV_ILP32) != 0)
1771 size = vsize * sizeof(Elf32_Auxinfo);
1774 size = vsize * sizeof(Elf_Auxinfo);
1775 if (sbuf_bcat(sb, auxv, size) != 0)
1783 * This sysctl allows a process to retrieve the argument list or process
1784 * title for another process without groping around in the address space
1785 * of the other process. It also allow a process to set its own "process
1786 * title to a string of its own choice.
1789 sysctl_kern_proc_args(SYSCTL_HANDLER_ARGS)
1791 int *name = (int *)arg1;
1792 u_int namelen = arg2;
1793 struct pargs *newpa, *pa;
1796 int flags, error = 0, error2;
1801 flags = PGET_CANSEE;
1802 if (req->newptr != NULL)
1803 flags |= PGET_ISCURRENT;
1804 error = pget((pid_t)name[0], flags, &p);
1812 error = SYSCTL_OUT(req, pa->ar_args, pa->ar_length);
1814 } else if ((p->p_flag & (P_WEXIT | P_SYSTEM)) == 0) {
1817 sbuf_new_for_sysctl(&sb, NULL, GET_PS_STRINGS_CHUNK_SZ, req);
1818 error = proc_getargv(curthread, p, &sb);
1819 error2 = sbuf_finish(&sb);
1822 if (error == 0 && error2 != 0)
1827 if (error != 0 || req->newptr == NULL)
1830 if (req->newlen + sizeof(struct pargs) > ps_arg_cache_limit)
1832 newpa = pargs_alloc(req->newlen);
1833 error = SYSCTL_IN(req, newpa->ar_args, req->newlen);
1847 * This sysctl allows a process to retrieve environment of another process.
1850 sysctl_kern_proc_env(SYSCTL_HANDLER_ARGS)
1852 int *name = (int *)arg1;
1853 u_int namelen = arg2;
1861 error = pget((pid_t)name[0], PGET_WANTREAD, &p);
1864 if ((p->p_flag & P_SYSTEM) != 0) {
1869 sbuf_new_for_sysctl(&sb, NULL, GET_PS_STRINGS_CHUNK_SZ, req);
1870 error = proc_getenvv(curthread, p, &sb);
1871 error2 = sbuf_finish(&sb);
1874 return (error != 0 ? error : error2);
1878 * This sysctl allows a process to retrieve ELF auxiliary vector of
1882 sysctl_kern_proc_auxv(SYSCTL_HANDLER_ARGS)
1884 int *name = (int *)arg1;
1885 u_int namelen = arg2;
1893 error = pget((pid_t)name[0], PGET_WANTREAD, &p);
1896 if ((p->p_flag & P_SYSTEM) != 0) {
1900 sbuf_new_for_sysctl(&sb, NULL, GET_PS_STRINGS_CHUNK_SZ, req);
1901 error = proc_getauxv(curthread, p, &sb);
1902 error2 = sbuf_finish(&sb);
1905 return (error != 0 ? error : error2);
1909 * This sysctl allows a process to retrieve the path of the executable for
1910 * itself or another process.
1913 sysctl_kern_proc_pathname(SYSCTL_HANDLER_ARGS)
1915 pid_t *pidp = (pid_t *)arg1;
1916 unsigned int arglen = arg2;
1919 char *retbuf, *freebuf;
1924 if (*pidp == -1) { /* -1 means this process */
1925 p = req->td->td_proc;
1927 error = pget(*pidp, PGET_CANSEE, &p);
1941 error = vn_fullpath(req->td, vp, &retbuf, &freebuf);
1945 error = SYSCTL_OUT(req, retbuf, strlen(retbuf) + 1);
1946 free(freebuf, M_TEMP);
1951 sysctl_kern_proc_sv_name(SYSCTL_HANDLER_ARGS)
1964 error = pget((pid_t)name[0], PGET_CANSEE, &p);
1967 sv_name = p->p_sysent->sv_name;
1969 return (sysctl_handle_string(oidp, sv_name, 0, req));
1972 #ifdef KINFO_OVMENTRY_SIZE
1973 CTASSERT(sizeof(struct kinfo_ovmentry) == KINFO_OVMENTRY_SIZE);
1976 #ifdef COMPAT_FREEBSD7
1978 sysctl_kern_proc_ovmmap(SYSCTL_HANDLER_ARGS)
1980 vm_map_entry_t entry, tmp_entry;
1981 unsigned int last_timestamp;
1982 char *fullpath, *freepath;
1983 struct kinfo_ovmentry *kve;
1993 error = pget((pid_t)name[0], PGET_WANTREAD, &p);
1996 vm = vmspace_acquire_ref(p);
2001 kve = malloc(sizeof(*kve), M_TEMP, M_WAITOK);
2004 vm_map_lock_read(map);
2005 for (entry = map->header.next; entry != &map->header;
2006 entry = entry->next) {
2007 vm_object_t obj, tobj, lobj;
2010 if (entry->eflags & MAP_ENTRY_IS_SUB_MAP)
2013 bzero(kve, sizeof(*kve));
2014 kve->kve_structsize = sizeof(*kve);
2016 kve->kve_private_resident = 0;
2017 obj = entry->object.vm_object;
2019 VM_OBJECT_RLOCK(obj);
2020 if (obj->shadow_count == 1)
2021 kve->kve_private_resident =
2022 obj->resident_page_count;
2024 kve->kve_resident = 0;
2025 addr = entry->start;
2026 while (addr < entry->end) {
2027 if (pmap_extract(map->pmap, addr))
2028 kve->kve_resident++;
2032 for (lobj = tobj = obj; tobj; tobj = tobj->backing_object) {
2034 VM_OBJECT_RLOCK(tobj);
2036 VM_OBJECT_RUNLOCK(lobj);
2040 kve->kve_start = (void*)entry->start;
2041 kve->kve_end = (void*)entry->end;
2042 kve->kve_offset = (off_t)entry->offset;
2044 if (entry->protection & VM_PROT_READ)
2045 kve->kve_protection |= KVME_PROT_READ;
2046 if (entry->protection & VM_PROT_WRITE)
2047 kve->kve_protection |= KVME_PROT_WRITE;
2048 if (entry->protection & VM_PROT_EXECUTE)
2049 kve->kve_protection |= KVME_PROT_EXEC;
2051 if (entry->eflags & MAP_ENTRY_COW)
2052 kve->kve_flags |= KVME_FLAG_COW;
2053 if (entry->eflags & MAP_ENTRY_NEEDS_COPY)
2054 kve->kve_flags |= KVME_FLAG_NEEDS_COPY;
2055 if (entry->eflags & MAP_ENTRY_NOCOREDUMP)
2056 kve->kve_flags |= KVME_FLAG_NOCOREDUMP;
2058 last_timestamp = map->timestamp;
2059 vm_map_unlock_read(map);
2061 kve->kve_fileid = 0;
2067 switch (lobj->type) {
2069 kve->kve_type = KVME_TYPE_DEFAULT;
2072 kve->kve_type = KVME_TYPE_VNODE;
2077 kve->kve_type = KVME_TYPE_SWAP;
2080 kve->kve_type = KVME_TYPE_DEVICE;
2083 kve->kve_type = KVME_TYPE_PHYS;
2086 kve->kve_type = KVME_TYPE_DEAD;
2089 kve->kve_type = KVME_TYPE_SG;
2092 kve->kve_type = KVME_TYPE_UNKNOWN;
2096 VM_OBJECT_RUNLOCK(lobj);
2098 kve->kve_ref_count = obj->ref_count;
2099 kve->kve_shadow_count = obj->shadow_count;
2100 VM_OBJECT_RUNLOCK(obj);
2102 vn_fullpath(curthread, vp, &fullpath,
2104 cred = curthread->td_ucred;
2105 vn_lock(vp, LK_SHARED | LK_RETRY);
2106 if (VOP_GETATTR(vp, &va, cred) == 0) {
2107 kve->kve_fileid = va.va_fileid;
2108 kve->kve_fsid = va.va_fsid;
2113 kve->kve_type = KVME_TYPE_NONE;
2114 kve->kve_ref_count = 0;
2115 kve->kve_shadow_count = 0;
2118 strlcpy(kve->kve_path, fullpath, sizeof(kve->kve_path));
2119 if (freepath != NULL)
2120 free(freepath, M_TEMP);
2122 error = SYSCTL_OUT(req, kve, sizeof(*kve));
2123 vm_map_lock_read(map);
2126 if (last_timestamp != map->timestamp) {
2127 vm_map_lookup_entry(map, addr - 1, &tmp_entry);
2131 vm_map_unlock_read(map);
2137 #endif /* COMPAT_FREEBSD7 */
2139 #ifdef KINFO_VMENTRY_SIZE
2140 CTASSERT(sizeof(struct kinfo_vmentry) == KINFO_VMENTRY_SIZE);
2144 kern_proc_vmmap_resident(vm_map_t map, vm_map_entry_t entry,
2145 struct kinfo_vmentry *kve)
2147 vm_object_t obj, tobj;
2150 vm_paddr_t locked_pa;
2151 vm_pindex_t pi, pi_adv, pindex;
2154 obj = entry->object.vm_object;
2155 addr = entry->start;
2157 pi = OFF_TO_IDX(entry->offset);
2158 for (; addr < entry->end; addr += IDX_TO_OFF(pi_adv), pi += pi_adv) {
2159 if (m_adv != NULL) {
2162 pi_adv = OFF_TO_IDX(entry->end - addr);
2164 for (tobj = obj;; tobj = tobj->backing_object) {
2165 m = vm_page_find_least(tobj, pindex);
2167 if (m->pindex == pindex)
2169 if (pi_adv > m->pindex - pindex) {
2170 pi_adv = m->pindex - pindex;
2174 if (tobj->backing_object == NULL)
2176 pindex += OFF_TO_IDX(tobj->
2177 backing_object_offset);
2181 if (m->psind != 0 && addr + pagesizes[1] <= entry->end &&
2182 (addr & (pagesizes[1] - 1)) == 0 &&
2183 (pmap_mincore(map->pmap, addr, &locked_pa) &
2184 MINCORE_SUPER) != 0) {
2185 kve->kve_flags |= KVME_FLAG_SUPER;
2186 pi_adv = OFF_TO_IDX(pagesizes[1]);
2189 * We do not test the found page on validity.
2190 * Either the page is busy and being paged in,
2191 * or it was invalidated. The first case
2192 * should be counted as resident, the second
2193 * is not so clear; we do account both.
2197 kve->kve_resident += pi_adv;
2200 PA_UNLOCK_COND(locked_pa);
2204 * Must be called with the process locked and will return unlocked.
2207 kern_proc_vmmap_out(struct proc *p, struct sbuf *sb)
2209 vm_map_entry_t entry, tmp_entry;
2212 vm_object_t obj, tobj, lobj;
2213 char *fullpath, *freepath;
2214 struct kinfo_vmentry *kve;
2219 unsigned int last_timestamp;
2222 PROC_LOCK_ASSERT(p, MA_OWNED);
2226 vm = vmspace_acquire_ref(p);
2231 kve = malloc(sizeof(*kve), M_TEMP, M_WAITOK);
2235 vm_map_lock_read(map);
2236 for (entry = map->header.next; entry != &map->header;
2237 entry = entry->next) {
2238 if (entry->eflags & MAP_ENTRY_IS_SUB_MAP)
2242 bzero(kve, sizeof(*kve));
2243 obj = entry->object.vm_object;
2245 for (tobj = obj; tobj != NULL;
2246 tobj = tobj->backing_object) {
2247 VM_OBJECT_RLOCK(tobj);
2250 if (obj->backing_object == NULL)
2251 kve->kve_private_resident =
2252 obj->resident_page_count;
2253 if (!vmmap_skip_res_cnt)
2254 kern_proc_vmmap_resident(map, entry, kve);
2255 for (tobj = obj; tobj != NULL;
2256 tobj = tobj->backing_object) {
2257 if (tobj != obj && tobj != lobj)
2258 VM_OBJECT_RUNLOCK(tobj);
2264 kve->kve_start = entry->start;
2265 kve->kve_end = entry->end;
2266 kve->kve_offset = entry->offset;
2268 if (entry->protection & VM_PROT_READ)
2269 kve->kve_protection |= KVME_PROT_READ;
2270 if (entry->protection & VM_PROT_WRITE)
2271 kve->kve_protection |= KVME_PROT_WRITE;
2272 if (entry->protection & VM_PROT_EXECUTE)
2273 kve->kve_protection |= KVME_PROT_EXEC;
2275 if (entry->eflags & MAP_ENTRY_COW)
2276 kve->kve_flags |= KVME_FLAG_COW;
2277 if (entry->eflags & MAP_ENTRY_NEEDS_COPY)
2278 kve->kve_flags |= KVME_FLAG_NEEDS_COPY;
2279 if (entry->eflags & MAP_ENTRY_NOCOREDUMP)
2280 kve->kve_flags |= KVME_FLAG_NOCOREDUMP;
2281 if (entry->eflags & MAP_ENTRY_GROWS_UP)
2282 kve->kve_flags |= KVME_FLAG_GROWS_UP;
2283 if (entry->eflags & MAP_ENTRY_GROWS_DOWN)
2284 kve->kve_flags |= KVME_FLAG_GROWS_DOWN;
2286 last_timestamp = map->timestamp;
2287 vm_map_unlock_read(map);
2293 switch (lobj->type) {
2295 kve->kve_type = KVME_TYPE_DEFAULT;
2298 kve->kve_type = KVME_TYPE_VNODE;
2303 kve->kve_type = KVME_TYPE_SWAP;
2306 kve->kve_type = KVME_TYPE_DEVICE;
2309 kve->kve_type = KVME_TYPE_PHYS;
2312 kve->kve_type = KVME_TYPE_DEAD;
2315 kve->kve_type = KVME_TYPE_SG;
2317 case OBJT_MGTDEVICE:
2318 kve->kve_type = KVME_TYPE_MGTDEVICE;
2321 kve->kve_type = KVME_TYPE_UNKNOWN;
2325 VM_OBJECT_RUNLOCK(lobj);
2327 kve->kve_ref_count = obj->ref_count;
2328 kve->kve_shadow_count = obj->shadow_count;
2329 VM_OBJECT_RUNLOCK(obj);
2331 vn_fullpath(curthread, vp, &fullpath,
2333 kve->kve_vn_type = vntype_to_kinfo(vp->v_type);
2334 cred = curthread->td_ucred;
2335 vn_lock(vp, LK_SHARED | LK_RETRY);
2336 if (VOP_GETATTR(vp, &va, cred) == 0) {
2337 kve->kve_vn_fileid = va.va_fileid;
2338 kve->kve_vn_fsid = va.va_fsid;
2340 MAKEIMODE(va.va_type, va.va_mode);
2341 kve->kve_vn_size = va.va_size;
2342 kve->kve_vn_rdev = va.va_rdev;
2343 kve->kve_status = KF_ATTR_VALID;
2348 kve->kve_type = KVME_TYPE_NONE;
2349 kve->kve_ref_count = 0;
2350 kve->kve_shadow_count = 0;
2353 strlcpy(kve->kve_path, fullpath, sizeof(kve->kve_path));
2354 if (freepath != NULL)
2355 free(freepath, M_TEMP);
2357 /* Pack record size down */
2358 kve->kve_structsize = offsetof(struct kinfo_vmentry, kve_path) +
2359 strlen(kve->kve_path) + 1;
2360 kve->kve_structsize = roundup(kve->kve_structsize,
2362 if (sbuf_bcat(sb, kve, kve->kve_structsize) != 0)
2364 vm_map_lock_read(map);
2367 if (last_timestamp != map->timestamp) {
2368 vm_map_lookup_entry(map, addr - 1, &tmp_entry);
2372 vm_map_unlock_read(map);
2380 sysctl_kern_proc_vmmap(SYSCTL_HANDLER_ARGS)
2384 int error, error2, *name;
2387 sbuf_new_for_sysctl(&sb, NULL, sizeof(struct kinfo_vmentry), req);
2388 error = pget((pid_t)name[0], PGET_CANDEBUG | PGET_NOTWEXIT, &p);
2393 error = kern_proc_vmmap_out(p, &sb);
2394 error2 = sbuf_finish(&sb);
2396 return (error != 0 ? error : error2);
2399 #if defined(STACK) || defined(DDB)
2401 sysctl_kern_proc_kstack(SYSCTL_HANDLER_ARGS)
2403 struct kinfo_kstack *kkstp;
2404 int error, i, *name, numthreads;
2405 lwpid_t *lwpidarray;
2412 error = pget((pid_t)name[0], PGET_NOTINEXEC | PGET_WANTREAD, &p);
2416 kkstp = malloc(sizeof(*kkstp), M_TEMP, M_WAITOK);
2417 st = stack_create();
2423 if (numthreads < p->p_numthreads) {
2424 if (lwpidarray != NULL) {
2425 free(lwpidarray, M_TEMP);
2428 numthreads = p->p_numthreads;
2430 lwpidarray = malloc(sizeof(*lwpidarray) * numthreads, M_TEMP,
2438 * XXXRW: During the below loop, execve(2) and countless other sorts
2439 * of changes could have taken place. Should we check to see if the
2440 * vmspace has been replaced, or the like, in order to prevent
2441 * giving a snapshot that spans, say, execve(2), with some threads
2442 * before and some after? Among other things, the credentials could
2443 * have changed, in which case the right to extract debug info might
2444 * no longer be assured.
2446 FOREACH_THREAD_IN_PROC(p, td) {
2447 KASSERT(i < numthreads,
2448 ("sysctl_kern_proc_kstack: numthreads"));
2449 lwpidarray[i] = td->td_tid;
2453 for (i = 0; i < numthreads; i++) {
2454 td = thread_find(p, lwpidarray[i]);
2458 bzero(kkstp, sizeof(*kkstp));
2459 (void)sbuf_new(&sb, kkstp->kkst_trace,
2460 sizeof(kkstp->kkst_trace), SBUF_FIXEDLEN);
2462 kkstp->kkst_tid = td->td_tid;
2463 if (TD_IS_SWAPPED(td))
2464 kkstp->kkst_state = KKST_STATE_SWAPPED;
2465 else if (TD_IS_RUNNING(td))
2466 kkstp->kkst_state = KKST_STATE_RUNNING;
2468 kkstp->kkst_state = KKST_STATE_STACKOK;
2469 stack_save_td(st, td);
2473 stack_sbuf_print(&sb, st);
2476 error = SYSCTL_OUT(req, kkstp, sizeof(*kkstp));
2483 if (lwpidarray != NULL)
2484 free(lwpidarray, M_TEMP);
2486 free(kkstp, M_TEMP);
2492 * This sysctl allows a process to retrieve the full list of groups from
2493 * itself or another process.
2496 sysctl_kern_proc_groups(SYSCTL_HANDLER_ARGS)
2498 pid_t *pidp = (pid_t *)arg1;
2499 unsigned int arglen = arg2;
2506 if (*pidp == -1) { /* -1 means this process */
2507 p = req->td->td_proc;
2509 error = pget(*pidp, PGET_CANSEE, &p);
2514 cred = crhold(p->p_ucred);
2518 error = SYSCTL_OUT(req, cred->cr_groups,
2519 cred->cr_ngroups * sizeof(gid_t));
2525 * This sysctl allows a process to retrieve or/and set the resource limit for
2529 sysctl_kern_proc_rlimit(SYSCTL_HANDLER_ARGS)
2531 int *name = (int *)arg1;
2532 u_int namelen = arg2;
2541 which = (u_int)name[1];
2542 if (which >= RLIM_NLIMITS)
2545 if (req->newptr != NULL && req->newlen != sizeof(rlim))
2548 flags = PGET_HOLD | PGET_NOTWEXIT;
2549 if (req->newptr != NULL)
2550 flags |= PGET_CANDEBUG;
2552 flags |= PGET_CANSEE;
2553 error = pget((pid_t)name[0], flags, &p);
2560 if (req->oldptr != NULL) {
2562 lim_rlimit(p, which, &rlim);
2565 error = SYSCTL_OUT(req, &rlim, sizeof(rlim));
2572 if (req->newptr != NULL) {
2573 error = SYSCTL_IN(req, &rlim, sizeof(rlim));
2575 error = kern_proc_setrlimit(curthread, p, which, &rlim);
2584 * This sysctl allows a process to retrieve ps_strings structure location of
2588 sysctl_kern_proc_ps_strings(SYSCTL_HANDLER_ARGS)
2590 int *name = (int *)arg1;
2591 u_int namelen = arg2;
2593 vm_offset_t ps_strings;
2595 #ifdef COMPAT_FREEBSD32
2596 uint32_t ps_strings32;
2602 error = pget((pid_t)name[0], PGET_CANDEBUG, &p);
2605 #ifdef COMPAT_FREEBSD32
2606 if ((req->flags & SCTL_MASK32) != 0) {
2608 * We return 0 if the 32 bit emulation request is for a 64 bit
2611 ps_strings32 = SV_PROC_FLAG(p, SV_ILP32) != 0 ?
2612 PTROUT(p->p_sysent->sv_psstrings) : 0;
2614 error = SYSCTL_OUT(req, &ps_strings32, sizeof(ps_strings32));
2618 ps_strings = p->p_sysent->sv_psstrings;
2620 error = SYSCTL_OUT(req, &ps_strings, sizeof(ps_strings));
2625 * This sysctl allows a process to retrieve umask of another process.
2628 sysctl_kern_proc_umask(SYSCTL_HANDLER_ARGS)
2630 int *name = (int *)arg1;
2631 u_int namelen = arg2;
2639 error = pget((pid_t)name[0], PGET_WANTREAD, &p);
2643 FILEDESC_SLOCK(p->p_fd);
2644 fd_cmask = p->p_fd->fd_cmask;
2645 FILEDESC_SUNLOCK(p->p_fd);
2647 error = SYSCTL_OUT(req, &fd_cmask, sizeof(fd_cmask));
2652 * This sysctl allows a process to set and retrieve binary osreldate of
2656 sysctl_kern_proc_osrel(SYSCTL_HANDLER_ARGS)
2658 int *name = (int *)arg1;
2659 u_int namelen = arg2;
2661 int flags, error, osrel;
2666 if (req->newptr != NULL && req->newlen != sizeof(osrel))
2669 flags = PGET_HOLD | PGET_NOTWEXIT;
2670 if (req->newptr != NULL)
2671 flags |= PGET_CANDEBUG;
2673 flags |= PGET_CANSEE;
2674 error = pget((pid_t)name[0], flags, &p);
2678 error = SYSCTL_OUT(req, &p->p_osrel, sizeof(p->p_osrel));
2682 if (req->newptr != NULL) {
2683 error = SYSCTL_IN(req, &osrel, sizeof(osrel));
2698 sysctl_kern_proc_sigtramp(SYSCTL_HANDLER_ARGS)
2700 int *name = (int *)arg1;
2701 u_int namelen = arg2;
2703 struct kinfo_sigtramp kst;
2704 const struct sysentvec *sv;
2706 #ifdef COMPAT_FREEBSD32
2707 struct kinfo_sigtramp32 kst32;
2713 error = pget((pid_t)name[0], PGET_CANDEBUG, &p);
2717 #ifdef COMPAT_FREEBSD32
2718 if ((req->flags & SCTL_MASK32) != 0) {
2719 bzero(&kst32, sizeof(kst32));
2720 if (SV_PROC_FLAG(p, SV_ILP32)) {
2721 if (sv->sv_sigcode_base != 0) {
2722 kst32.ksigtramp_start = sv->sv_sigcode_base;
2723 kst32.ksigtramp_end = sv->sv_sigcode_base +
2726 kst32.ksigtramp_start = sv->sv_psstrings -
2728 kst32.ksigtramp_end = sv->sv_psstrings;
2732 error = SYSCTL_OUT(req, &kst32, sizeof(kst32));
2736 bzero(&kst, sizeof(kst));
2737 if (sv->sv_sigcode_base != 0) {
2738 kst.ksigtramp_start = (char *)sv->sv_sigcode_base;
2739 kst.ksigtramp_end = (char *)sv->sv_sigcode_base +
2742 kst.ksigtramp_start = (char *)sv->sv_psstrings -
2744 kst.ksigtramp_end = (char *)sv->sv_psstrings;
2747 error = SYSCTL_OUT(req, &kst, sizeof(kst));
2751 SYSCTL_NODE(_kern, KERN_PROC, proc, CTLFLAG_RD, 0, "Process table");
2753 SYSCTL_PROC(_kern_proc, KERN_PROC_ALL, all, CTLFLAG_RD|CTLTYPE_STRUCT|
2754 CTLFLAG_MPSAFE, 0, 0, sysctl_kern_proc, "S,proc",
2755 "Return entire process table");
2757 static SYSCTL_NODE(_kern_proc, KERN_PROC_GID, gid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2758 sysctl_kern_proc, "Process table");
2760 static SYSCTL_NODE(_kern_proc, KERN_PROC_PGRP, pgrp, CTLFLAG_RD | CTLFLAG_MPSAFE,
2761 sysctl_kern_proc, "Process table");
2763 static SYSCTL_NODE(_kern_proc, KERN_PROC_RGID, rgid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2764 sysctl_kern_proc, "Process table");
2766 static SYSCTL_NODE(_kern_proc, KERN_PROC_SESSION, sid, CTLFLAG_RD |
2767 CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2769 static SYSCTL_NODE(_kern_proc, KERN_PROC_TTY, tty, CTLFLAG_RD | CTLFLAG_MPSAFE,
2770 sysctl_kern_proc, "Process table");
2772 static SYSCTL_NODE(_kern_proc, KERN_PROC_UID, uid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2773 sysctl_kern_proc, "Process table");
2775 static SYSCTL_NODE(_kern_proc, KERN_PROC_RUID, ruid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2776 sysctl_kern_proc, "Process table");
2778 static SYSCTL_NODE(_kern_proc, KERN_PROC_PID, pid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2779 sysctl_kern_proc, "Process table");
2781 static SYSCTL_NODE(_kern_proc, KERN_PROC_PROC, proc, CTLFLAG_RD | CTLFLAG_MPSAFE,
2782 sysctl_kern_proc, "Return process table, no threads");
2784 static SYSCTL_NODE(_kern_proc, KERN_PROC_ARGS, args,
2785 CTLFLAG_RW | CTLFLAG_ANYBODY | CTLFLAG_MPSAFE,
2786 sysctl_kern_proc_args, "Process argument list");
2788 static SYSCTL_NODE(_kern_proc, KERN_PROC_ENV, env, CTLFLAG_RD | CTLFLAG_MPSAFE,
2789 sysctl_kern_proc_env, "Process environment");
2791 static SYSCTL_NODE(_kern_proc, KERN_PROC_AUXV, auxv, CTLFLAG_RD |
2792 CTLFLAG_MPSAFE, sysctl_kern_proc_auxv, "Process ELF auxiliary vector");
2794 static SYSCTL_NODE(_kern_proc, KERN_PROC_PATHNAME, pathname, CTLFLAG_RD |
2795 CTLFLAG_MPSAFE, sysctl_kern_proc_pathname, "Process executable path");
2797 static SYSCTL_NODE(_kern_proc, KERN_PROC_SV_NAME, sv_name, CTLFLAG_RD |
2798 CTLFLAG_MPSAFE, sysctl_kern_proc_sv_name,
2799 "Process syscall vector name (ABI type)");
2801 static SYSCTL_NODE(_kern_proc, (KERN_PROC_GID | KERN_PROC_INC_THREAD), gid_td,
2802 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2804 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PGRP | KERN_PROC_INC_THREAD), pgrp_td,
2805 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2807 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RGID | KERN_PROC_INC_THREAD), rgid_td,
2808 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2810 static SYSCTL_NODE(_kern_proc, (KERN_PROC_SESSION | KERN_PROC_INC_THREAD),
2811 sid_td, CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2813 static SYSCTL_NODE(_kern_proc, (KERN_PROC_TTY | KERN_PROC_INC_THREAD), tty_td,
2814 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2816 static SYSCTL_NODE(_kern_proc, (KERN_PROC_UID | KERN_PROC_INC_THREAD), uid_td,
2817 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2819 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RUID | KERN_PROC_INC_THREAD), ruid_td,
2820 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2822 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PID | KERN_PROC_INC_THREAD), pid_td,
2823 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2825 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PROC | KERN_PROC_INC_THREAD), proc_td,
2826 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc,
2827 "Return process table, no threads");
2829 #ifdef COMPAT_FREEBSD7
2830 static SYSCTL_NODE(_kern_proc, KERN_PROC_OVMMAP, ovmmap, CTLFLAG_RD |
2831 CTLFLAG_MPSAFE, sysctl_kern_proc_ovmmap, "Old Process vm map entries");
2834 static SYSCTL_NODE(_kern_proc, KERN_PROC_VMMAP, vmmap, CTLFLAG_RD |
2835 CTLFLAG_MPSAFE, sysctl_kern_proc_vmmap, "Process vm map entries");
2837 #if defined(STACK) || defined(DDB)
2838 static SYSCTL_NODE(_kern_proc, KERN_PROC_KSTACK, kstack, CTLFLAG_RD |
2839 CTLFLAG_MPSAFE, sysctl_kern_proc_kstack, "Process kernel stacks");
2842 static SYSCTL_NODE(_kern_proc, KERN_PROC_GROUPS, groups, CTLFLAG_RD |
2843 CTLFLAG_MPSAFE, sysctl_kern_proc_groups, "Process groups");
2845 static SYSCTL_NODE(_kern_proc, KERN_PROC_RLIMIT, rlimit, CTLFLAG_RW |
2846 CTLFLAG_ANYBODY | CTLFLAG_MPSAFE, sysctl_kern_proc_rlimit,
2847 "Process resource limits");
2849 static SYSCTL_NODE(_kern_proc, KERN_PROC_PS_STRINGS, ps_strings, CTLFLAG_RD |
2850 CTLFLAG_MPSAFE, sysctl_kern_proc_ps_strings,
2851 "Process ps_strings location");
2853 static SYSCTL_NODE(_kern_proc, KERN_PROC_UMASK, umask, CTLFLAG_RD |
2854 CTLFLAG_MPSAFE, sysctl_kern_proc_umask, "Process umask");
2856 static SYSCTL_NODE(_kern_proc, KERN_PROC_OSREL, osrel, CTLFLAG_RW |
2857 CTLFLAG_ANYBODY | CTLFLAG_MPSAFE, sysctl_kern_proc_osrel,
2858 "Process binary osreldate");
2860 static SYSCTL_NODE(_kern_proc, KERN_PROC_SIGTRAMP, sigtramp, CTLFLAG_RD |
2861 CTLFLAG_MPSAFE, sysctl_kern_proc_sigtramp,
2862 "Process signal trampoline location");
2869 struct proc *cp, *p;
2871 bool restart, seen_stopped, seen_exiting, stopped_some;
2875 * stop_all_proc() assumes that all process which have
2876 * usermode must be stopped, except current process, for
2877 * obvious reasons. Since other threads in the process
2878 * establishing global stop could unstop something, disable
2879 * calls from multithreaded processes as precaution. The
2880 * service must not be user-callable anyway.
2882 KASSERT((cp->p_flag & P_HADTHREADS) == 0 ||
2883 (cp->p_flag & P_KTHREAD) != 0, ("mt stop_all_proc"));
2886 sx_xlock(&allproc_lock);
2888 seen_exiting = seen_stopped = stopped_some = restart = false;
2889 LIST_REMOVE(cp, p_list);
2890 LIST_INSERT_HEAD(&allproc, cp, p_list);
2892 p = LIST_NEXT(cp, p_list);
2895 LIST_REMOVE(cp, p_list);
2896 LIST_INSERT_AFTER(p, cp, p_list);
2898 if ((p->p_flag & (P_KTHREAD | P_SYSTEM |
2899 P_TOTAL_STOP)) != 0) {
2903 if ((p->p_flag & P_WEXIT) != 0) {
2904 seen_exiting = true;
2908 if (P_SHOULDSTOP(p) == P_STOPPED_SINGLE) {
2910 * Stopped processes are tolerated when there
2911 * are no other processes which might continue
2912 * them. P_STOPPED_SINGLE but not
2913 * P_TOTAL_STOP process still has at least one
2916 seen_stopped = true;
2921 sx_xunlock(&allproc_lock);
2922 r = thread_single(p, SINGLE_ALLPROC);
2926 stopped_some = true;
2929 sx_xlock(&allproc_lock);
2931 /* Catch forked children we did not see in iteration. */
2932 if (gen != allproc_gen)
2934 sx_xunlock(&allproc_lock);
2935 if (restart || stopped_some || seen_exiting || seen_stopped) {
2936 kern_yield(PRI_USER);
2942 resume_all_proc(void)
2944 struct proc *cp, *p;
2947 sx_xlock(&allproc_lock);
2948 LIST_REMOVE(cp, p_list);
2949 LIST_INSERT_HEAD(&allproc, cp, p_list);
2951 p = LIST_NEXT(cp, p_list);
2954 LIST_REMOVE(cp, p_list);
2955 LIST_INSERT_AFTER(p, cp, p_list);
2957 if ((p->p_flag & P_TOTAL_STOP) != 0) {
2958 sx_xunlock(&allproc_lock);
2960 thread_single_end(p, SINGLE_ALLPROC);
2963 sx_xlock(&allproc_lock);
2968 sx_xunlock(&allproc_lock);
2971 #define TOTAL_STOP_DEBUG 1
2972 #ifdef TOTAL_STOP_DEBUG
2973 volatile static int ap_resume;
2974 #include <sys/mount.h>
2977 sysctl_debug_stop_all_proc(SYSCTL_HANDLER_ARGS)
2983 error = sysctl_handle_int(oidp, &val, 0, req);
2984 if (error != 0 || req->newptr == NULL)
2989 while (ap_resume == 0)
2997 SYSCTL_PROC(_debug, OID_AUTO, stop_all_proc, CTLTYPE_INT | CTLFLAG_RW |
2998 CTLFLAG_MPSAFE, __DEVOLATILE(int *, &ap_resume), 0,
2999 sysctl_debug_stop_all_proc, "I",