2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1982, 1986, 1989, 1991, 1993
5 * The Regents of the University of California. All rights reserved.
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8 * modification, are permitted provided that the following conditions
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31 * @(#)kern_proc.c 8.7 (Berkeley) 2/14/95
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
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>
45 #include <sys/eventhandler.h>
48 #include <sys/kernel.h>
49 #include <sys/limits.h>
51 #include <sys/loginclass.h>
52 #include <sys/malloc.h>
54 #include <sys/mount.h>
55 #include <sys/mutex.h>
57 #include <sys/ptrace.h>
58 #include <sys/refcount.h>
59 #include <sys/resourcevar.h>
60 #include <sys/rwlock.h>
62 #include <sys/sysent.h>
63 #include <sys/sched.h>
65 #include <sys/stack.h>
67 #include <sys/sysctl.h>
68 #include <sys/filedesc.h>
70 #include <sys/signalvar.h>
74 #include <sys/vnode.h>
82 #include <vm/vm_param.h>
83 #include <vm/vm_extern.h>
85 #include <vm/vm_map.h>
86 #include <vm/vm_object.h>
87 #include <vm/vm_page.h>
90 #ifdef COMPAT_FREEBSD32
91 #include <compat/freebsd32/freebsd32.h>
92 #include <compat/freebsd32/freebsd32_util.h>
95 SDT_PROVIDER_DEFINE(proc);
96 SDT_PROBE_DEFINE4(proc, , ctor, entry, "struct proc *", "int", "void *",
98 SDT_PROBE_DEFINE4(proc, , ctor, return, "struct proc *", "int", "void *",
100 SDT_PROBE_DEFINE4(proc, , dtor, entry, "struct proc *", "int", "void *",
102 SDT_PROBE_DEFINE3(proc, , dtor, return, "struct proc *", "int", "void *");
103 SDT_PROBE_DEFINE3(proc, , init, entry, "struct proc *", "int", "int");
104 SDT_PROBE_DEFINE3(proc, , init, return, "struct proc *", "int", "int");
106 MALLOC_DEFINE(M_PGRP, "pgrp", "process group header");
107 MALLOC_DEFINE(M_SESSION, "session", "session header");
108 static MALLOC_DEFINE(M_PROC, "proc", "Proc structures");
109 MALLOC_DEFINE(M_SUBPROC, "subproc", "Proc sub-structures");
111 static void doenterpgrp(struct proc *, struct pgrp *);
112 static void orphanpg(struct pgrp *pg);
113 static void fill_kinfo_aggregate(struct proc *p, struct kinfo_proc *kp);
114 static void fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp);
115 static void fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp,
117 static void pgadjustjobc(struct pgrp *pgrp, int entering);
118 static void pgdelete(struct pgrp *);
119 static int proc_ctor(void *mem, int size, void *arg, int flags);
120 static void proc_dtor(void *mem, int size, void *arg);
121 static int proc_init(void *mem, int size, int flags);
122 static void proc_fini(void *mem, int size);
123 static void pargs_free(struct pargs *pa);
124 static struct proc *zpfind_locked(pid_t pid);
127 * Other process lists
129 struct pidhashhead *pidhashtbl;
131 struct pgrphashhead *pgrphashtbl;
133 struct proclist allproc;
134 struct proclist zombproc;
135 struct sx __exclusive_cache_line allproc_lock;
136 struct sx __exclusive_cache_line proctree_lock;
137 struct mtx __exclusive_cache_line ppeers_lock;
138 uma_zone_t proc_zone;
141 * The offset of various fields in struct proc and struct thread.
142 * These are used by kernel debuggers to enumerate kernel threads and
145 const int proc_off_p_pid = offsetof(struct proc, p_pid);
146 const int proc_off_p_comm = offsetof(struct proc, p_comm);
147 const int proc_off_p_list = offsetof(struct proc, p_list);
148 const int proc_off_p_threads = offsetof(struct proc, p_threads);
149 const int thread_off_td_tid = offsetof(struct thread, td_tid);
150 const int thread_off_td_name = offsetof(struct thread, td_name);
151 const int thread_off_td_oncpu = offsetof(struct thread, td_oncpu);
152 const int thread_off_td_pcb = offsetof(struct thread, td_pcb);
153 const int thread_off_td_plist = offsetof(struct thread, td_plist);
155 EVENTHANDLER_LIST_DEFINE(process_ctor);
156 EVENTHANDLER_LIST_DEFINE(process_dtor);
157 EVENTHANDLER_LIST_DEFINE(process_init);
158 EVENTHANDLER_LIST_DEFINE(process_fini);
159 EVENTHANDLER_LIST_DEFINE(process_exit);
160 EVENTHANDLER_LIST_DEFINE(process_fork);
161 EVENTHANDLER_LIST_DEFINE(process_exec);
163 EVENTHANDLER_LIST_DECLARE(thread_ctor);
164 EVENTHANDLER_LIST_DECLARE(thread_dtor);
166 int kstack_pages = KSTACK_PAGES;
167 SYSCTL_INT(_kern, OID_AUTO, kstack_pages, CTLFLAG_RD, &kstack_pages, 0,
168 "Kernel stack size in pages");
169 static int vmmap_skip_res_cnt = 0;
170 SYSCTL_INT(_kern, OID_AUTO, proc_vmmap_skip_resident_count, CTLFLAG_RW,
171 &vmmap_skip_res_cnt, 0,
172 "Skip calculation of the pages resident count in kern.proc.vmmap");
174 CTASSERT(sizeof(struct kinfo_proc) == KINFO_PROC_SIZE);
175 #ifdef COMPAT_FREEBSD32
176 CTASSERT(sizeof(struct kinfo_proc32) == KINFO_PROC32_SIZE);
180 * Initialize global process hashing structures.
186 sx_init(&allproc_lock, "allproc");
187 sx_init(&proctree_lock, "proctree");
188 mtx_init(&ppeers_lock, "p_peers", NULL, MTX_DEF);
190 LIST_INIT(&zombproc);
191 pidhashtbl = hashinit(maxproc / 4, M_PROC, &pidhash);
192 pgrphashtbl = hashinit(maxproc / 4, M_PROC, &pgrphash);
193 proc_zone = uma_zcreate("PROC", sched_sizeof_proc(),
194 proc_ctor, proc_dtor, proc_init, proc_fini,
195 UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
200 * Prepare a proc for use.
203 proc_ctor(void *mem, int size, void *arg, int flags)
208 p = (struct proc *)mem;
209 SDT_PROBE4(proc, , ctor , entry, p, size, arg, flags);
210 EVENTHANDLER_DIRECT_INVOKE(process_ctor, p);
211 SDT_PROBE4(proc, , ctor , return, p, size, arg, flags);
212 td = FIRST_THREAD_IN_PROC(p);
214 /* Make sure all thread constructors are executed */
215 EVENTHANDLER_DIRECT_INVOKE(thread_ctor, td);
221 * Reclaim a proc after use.
224 proc_dtor(void *mem, int size, void *arg)
229 /* INVARIANTS checks go here */
230 p = (struct proc *)mem;
231 td = FIRST_THREAD_IN_PROC(p);
232 SDT_PROBE4(proc, , dtor, entry, p, size, arg, td);
235 KASSERT((p->p_numthreads == 1),
236 ("bad number of threads in exiting process"));
237 KASSERT(STAILQ_EMPTY(&p->p_ktr), ("proc_dtor: non-empty p_ktr"));
239 /* Free all OSD associated to this thread. */
241 td_softdep_cleanup(td);
242 MPASS(td->td_su == NULL);
244 /* Make sure all thread destructors are executed */
245 EVENTHANDLER_DIRECT_INVOKE(thread_dtor, td);
247 EVENTHANDLER_DIRECT_INVOKE(process_dtor, p);
248 if (p->p_ksi != NULL)
249 KASSERT(! KSI_ONQ(p->p_ksi), ("SIGCHLD queue"));
250 SDT_PROBE3(proc, , dtor, return, p, size, arg);
254 * Initialize type-stable parts of a proc (when newly created).
257 proc_init(void *mem, int size, int flags)
261 p = (struct proc *)mem;
262 SDT_PROBE3(proc, , init, entry, p, size, flags);
263 mtx_init(&p->p_mtx, "process lock", NULL, MTX_DEF | MTX_DUPOK | MTX_NEW);
264 mtx_init(&p->p_slock, "process slock", NULL, MTX_SPIN | MTX_NEW);
265 mtx_init(&p->p_statmtx, "pstatl", NULL, MTX_SPIN | MTX_NEW);
266 mtx_init(&p->p_itimmtx, "pitiml", NULL, MTX_SPIN | MTX_NEW);
267 mtx_init(&p->p_profmtx, "pprofl", NULL, MTX_SPIN | MTX_NEW);
268 cv_init(&p->p_pwait, "ppwait");
269 cv_init(&p->p_dbgwait, "dbgwait");
270 TAILQ_INIT(&p->p_threads); /* all threads in proc */
271 EVENTHANDLER_DIRECT_INVOKE(process_init, p);
272 p->p_stats = pstats_alloc();
274 SDT_PROBE3(proc, , init, return, p, size, flags);
279 * UMA should ensure that this function is never called.
280 * Freeing a proc structure would violate type stability.
283 proc_fini(void *mem, int size)
288 p = (struct proc *)mem;
289 EVENTHANDLER_DIRECT_INVOKE(process_fini, p);
290 pstats_free(p->p_stats);
291 thread_free(FIRST_THREAD_IN_PROC(p));
292 mtx_destroy(&p->p_mtx);
293 if (p->p_ksi != NULL)
294 ksiginfo_free(p->p_ksi);
296 panic("proc reclaimed");
301 * Is p an inferior of the current process?
304 inferior(struct proc *p)
307 sx_assert(&proctree_lock, SX_LOCKED);
308 PROC_LOCK_ASSERT(p, MA_OWNED);
309 for (; p != curproc; p = proc_realparent(p)) {
317 pfind_locked(pid_t pid)
321 sx_assert(&allproc_lock, SX_LOCKED);
322 LIST_FOREACH(p, PIDHASH(pid), p_hash) {
323 if (p->p_pid == pid) {
325 if (p->p_state == PRS_NEW) {
336 * Locate a process by number; return only "live" processes -- i.e., neither
337 * zombies nor newly born but incompletely initialized processes. By not
338 * returning processes in the PRS_NEW state, we allow callers to avoid
339 * testing for that condition to avoid dereferencing p_ucred, et al.
347 if (p->p_pid == pid) {
351 sx_slock(&allproc_lock);
352 p = pfind_locked(pid);
353 sx_sunlock(&allproc_lock);
358 * Same as pfind but allow zombies.
365 sx_slock(&allproc_lock);
366 p = pfind_locked(pid);
368 p = zpfind_locked(pid);
369 sx_sunlock(&allproc_lock);
375 pfind_tid_locked(pid_t tid)
380 sx_assert(&allproc_lock, SX_LOCKED);
381 FOREACH_PROC_IN_SYSTEM(p) {
383 if (p->p_state == PRS_NEW) {
387 FOREACH_THREAD_IN_PROC(p, td) {
388 if (td->td_tid == tid)
398 * Locate a process group by number.
399 * The caller must hold proctree_lock.
406 sx_assert(&proctree_lock, SX_LOCKED);
408 LIST_FOREACH(pgrp, PGRPHASH(pgid), pg_hash) {
409 if (pgrp->pg_id == pgid) {
418 * Locate process and do additional manipulations, depending on flags.
421 pget(pid_t pid, int flags, struct proc **pp)
427 if (p->p_pid == pid) {
430 sx_slock(&allproc_lock);
431 if (pid <= PID_MAX) {
432 p = pfind_locked(pid);
433 if (p == NULL && (flags & PGET_NOTWEXIT) == 0)
434 p = zpfind_locked(pid);
435 } else if ((flags & PGET_NOTID) == 0) {
436 p = pfind_tid_locked(pid);
440 sx_sunlock(&allproc_lock);
443 if ((flags & PGET_CANSEE) != 0) {
444 error = p_cansee(curthread, p);
449 if ((flags & PGET_CANDEBUG) != 0) {
450 error = p_candebug(curthread, p);
454 if ((flags & PGET_ISCURRENT) != 0 && curproc != p) {
458 if ((flags & PGET_NOTWEXIT) != 0 && (p->p_flag & P_WEXIT) != 0) {
462 if ((flags & PGET_NOTINEXEC) != 0 && (p->p_flag & P_INEXEC) != 0) {
464 * XXXRW: Not clear ESRCH is the right error during proc
470 if ((flags & PGET_HOLD) != 0) {
482 * Create a new process group.
483 * pgid must be equal to the pid of p.
484 * Begin a new session if required.
487 enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp, struct session *sess)
490 sx_assert(&proctree_lock, SX_XLOCKED);
492 KASSERT(pgrp != NULL, ("enterpgrp: pgrp == NULL"));
493 KASSERT(p->p_pid == pgid,
494 ("enterpgrp: new pgrp and pid != pgid"));
495 KASSERT(pgfind(pgid) == NULL,
496 ("enterpgrp: pgrp with pgid exists"));
497 KASSERT(!SESS_LEADER(p),
498 ("enterpgrp: session leader attempted setpgrp"));
500 mtx_init(&pgrp->pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK);
506 mtx_init(&sess->s_mtx, "session", NULL, MTX_DEF);
508 p->p_flag &= ~P_CONTROLT;
512 sess->s_sid = p->p_pid;
513 refcount_init(&sess->s_count, 1);
514 sess->s_ttyvp = NULL;
515 sess->s_ttydp = NULL;
517 bcopy(p->p_session->s_login, sess->s_login,
518 sizeof(sess->s_login));
519 pgrp->pg_session = sess;
520 KASSERT(p == curproc,
521 ("enterpgrp: mksession and p != curproc"));
523 pgrp->pg_session = p->p_session;
524 sess_hold(pgrp->pg_session);
528 LIST_INIT(&pgrp->pg_members);
531 * As we have an exclusive lock of proctree_lock,
532 * this should not deadlock.
534 LIST_INSERT_HEAD(PGRPHASH(pgid), pgrp, pg_hash);
536 SLIST_INIT(&pgrp->pg_sigiolst);
539 doenterpgrp(p, pgrp);
545 * Move p to an existing process group
548 enterthispgrp(struct proc *p, struct pgrp *pgrp)
551 sx_assert(&proctree_lock, SX_XLOCKED);
552 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
553 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
554 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
555 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
556 KASSERT(pgrp->pg_session == p->p_session,
557 ("%s: pgrp's session %p, p->p_session %p.\n",
561 KASSERT(pgrp != p->p_pgrp,
562 ("%s: p belongs to pgrp.", __func__));
564 doenterpgrp(p, pgrp);
570 * Move p to a process group
573 doenterpgrp(struct proc *p, struct pgrp *pgrp)
575 struct pgrp *savepgrp;
577 sx_assert(&proctree_lock, SX_XLOCKED);
578 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
579 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
580 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
581 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
583 savepgrp = p->p_pgrp;
586 * Adjust eligibility of affected pgrps to participate in job control.
587 * Increment eligibility counts before decrementing, otherwise we
588 * could reach 0 spuriously during the first call.
591 fixjobc(p, p->p_pgrp, 0);
596 LIST_REMOVE(p, p_pglist);
599 LIST_INSERT_HEAD(&pgrp->pg_members, p, p_pglist);
600 PGRP_UNLOCK(savepgrp);
602 if (LIST_EMPTY(&savepgrp->pg_members))
607 * remove process from process group
610 leavepgrp(struct proc *p)
612 struct pgrp *savepgrp;
614 sx_assert(&proctree_lock, SX_XLOCKED);
615 savepgrp = p->p_pgrp;
618 LIST_REMOVE(p, p_pglist);
621 PGRP_UNLOCK(savepgrp);
622 if (LIST_EMPTY(&savepgrp->pg_members))
628 * delete a process group
631 pgdelete(struct pgrp *pgrp)
633 struct session *savesess;
636 sx_assert(&proctree_lock, SX_XLOCKED);
637 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
638 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
641 * Reset any sigio structures pointing to us as a result of
642 * F_SETOWN with our pgid.
644 funsetownlst(&pgrp->pg_sigiolst);
647 tp = pgrp->pg_session->s_ttyp;
648 LIST_REMOVE(pgrp, pg_hash);
649 savesess = pgrp->pg_session;
652 /* Remove the reference to the pgrp before deallocating it. */
655 tty_rel_pgrp(tp, pgrp);
658 mtx_destroy(&pgrp->pg_mtx);
660 sess_release(savesess);
664 pgadjustjobc(struct pgrp *pgrp, int entering)
672 if (pgrp->pg_jobc == 0)
679 * Adjust pgrp jobc counters when specified process changes process group.
680 * We count the number of processes in each process group that "qualify"
681 * the group for terminal job control (those with a parent in a different
682 * process group of the same session). If that count reaches zero, the
683 * process group becomes orphaned. Check both the specified process'
684 * process group and that of its children.
685 * entering == 0 => p is leaving specified group.
686 * entering == 1 => p is entering specified group.
689 fixjobc(struct proc *p, struct pgrp *pgrp, int entering)
691 struct pgrp *hispgrp;
692 struct session *mysession;
695 sx_assert(&proctree_lock, SX_LOCKED);
696 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
697 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
698 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
701 * Check p's parent to see whether p qualifies its own process
702 * group; if so, adjust count for p's process group.
704 mysession = pgrp->pg_session;
705 if ((hispgrp = p->p_pptr->p_pgrp) != pgrp &&
706 hispgrp->pg_session == mysession)
707 pgadjustjobc(pgrp, entering);
710 * Check this process' children to see whether they qualify
711 * their process groups; if so, adjust counts for children's
714 LIST_FOREACH(q, &p->p_children, p_sibling) {
716 if (hispgrp == pgrp ||
717 hispgrp->pg_session != mysession)
719 if (q->p_state == PRS_ZOMBIE)
721 pgadjustjobc(hispgrp, entering);
734 MPASS(p->p_flag & P_WEXIT);
736 * Do a quick check to see if there is anything to do with the
737 * proctree_lock held. pgrp and LIST_EMPTY checks are for fixjobc().
740 if (!SESS_LEADER(p) &&
741 (p->p_pgrp == p->p_pptr->p_pgrp) &&
742 LIST_EMPTY(&p->p_children)) {
748 sx_xlock(&proctree_lock);
749 if (SESS_LEADER(p)) {
753 * s_ttyp is not zero'd; we use this to indicate that
754 * the session once had a controlling terminal. (for
755 * logging and informational purposes)
766 * Signal foreground pgrp and revoke access to
767 * controlling terminal if it has not been revoked
770 * Because the TTY may have been revoked in the mean
771 * time and could already have a new session associated
772 * with it, make sure we don't send a SIGHUP to a
773 * foreground process group that does not belong to this
779 if (tp->t_session == sp)
780 tty_signal_pgrp(tp, SIGHUP);
785 sx_xunlock(&proctree_lock);
786 if (vn_lock(ttyvp, LK_EXCLUSIVE) == 0) {
787 VOP_REVOKE(ttyvp, REVOKEALL);
788 VOP_UNLOCK(ttyvp, 0);
791 sx_xlock(&proctree_lock);
794 fixjobc(p, p->p_pgrp, 0);
795 sx_xunlock(&proctree_lock);
799 * A process group has become orphaned;
800 * if there are any stopped processes in the group,
801 * hang-up all process in that group.
804 orphanpg(struct pgrp *pg)
808 PGRP_LOCK_ASSERT(pg, MA_OWNED);
810 LIST_FOREACH(p, &pg->pg_members, p_pglist) {
812 if (P_SHOULDSTOP(p) == P_STOPPED_SIG) {
814 LIST_FOREACH(p, &pg->pg_members, p_pglist) {
816 kern_psignal(p, SIGHUP);
817 kern_psignal(p, SIGCONT);
827 sess_hold(struct session *s)
830 refcount_acquire(&s->s_count);
834 sess_release(struct session *s)
837 if (refcount_release(&s->s_count)) {
838 if (s->s_ttyp != NULL) {
840 tty_rel_sess(s->s_ttyp, s);
842 mtx_destroy(&s->s_mtx);
849 DB_SHOW_COMMAND(pgrpdump, pgrpdump)
855 for (i = 0; i <= pgrphash; i++) {
856 if (!LIST_EMPTY(&pgrphashtbl[i])) {
857 printf("\tindx %d\n", i);
858 LIST_FOREACH(pgrp, &pgrphashtbl[i], pg_hash) {
860 "\tpgrp %p, pgid %ld, sess %p, sesscnt %d, mem %p\n",
861 (void *)pgrp, (long)pgrp->pg_id,
862 (void *)pgrp->pg_session,
863 pgrp->pg_session->s_count,
864 (void *)LIST_FIRST(&pgrp->pg_members));
865 LIST_FOREACH(p, &pgrp->pg_members, p_pglist) {
866 printf("\t\tpid %ld addr %p pgrp %p\n",
867 (long)p->p_pid, (void *)p,
877 * Calculate the kinfo_proc members which contain process-wide
879 * Must be called with the target process locked.
882 fill_kinfo_aggregate(struct proc *p, struct kinfo_proc *kp)
886 PROC_LOCK_ASSERT(p, MA_OWNED);
890 FOREACH_THREAD_IN_PROC(p, td) {
892 kp->ki_pctcpu += sched_pctcpu(td);
893 kp->ki_estcpu += sched_estcpu(td);
899 * Clear kinfo_proc and fill in any information that is common
900 * to all threads in the process.
901 * Must be called with the target process locked.
904 fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp)
911 struct timeval boottime;
913 /* For proc_realparent. */
914 sx_assert(&proctree_lock, SX_LOCKED);
915 PROC_LOCK_ASSERT(p, MA_OWNED);
916 bzero(kp, sizeof(*kp));
918 kp->ki_structsize = sizeof(*kp);
920 kp->ki_addr =/* p->p_addr; */0; /* XXX */
921 kp->ki_args = p->p_args;
922 kp->ki_textvp = p->p_textvp;
924 kp->ki_tracep = p->p_tracevp;
925 kp->ki_traceflag = p->p_traceflag;
928 kp->ki_vmspace = p->p_vmspace;
929 kp->ki_flag = p->p_flag;
930 kp->ki_flag2 = p->p_flag2;
933 kp->ki_uid = cred->cr_uid;
934 kp->ki_ruid = cred->cr_ruid;
935 kp->ki_svuid = cred->cr_svuid;
937 if (cred->cr_flags & CRED_FLAG_CAPMODE)
938 kp->ki_cr_flags |= KI_CRF_CAPABILITY_MODE;
939 /* XXX bde doesn't like KI_NGROUPS */
940 if (cred->cr_ngroups > KI_NGROUPS) {
941 kp->ki_ngroups = KI_NGROUPS;
942 kp->ki_cr_flags |= KI_CRF_GRP_OVERFLOW;
944 kp->ki_ngroups = cred->cr_ngroups;
945 bcopy(cred->cr_groups, kp->ki_groups,
946 kp->ki_ngroups * sizeof(gid_t));
947 kp->ki_rgid = cred->cr_rgid;
948 kp->ki_svgid = cred->cr_svgid;
949 /* If jailed(cred), emulate the old P_JAILED flag. */
951 kp->ki_flag |= P_JAILED;
952 /* If inside the jail, use 0 as a jail ID. */
953 if (cred->cr_prison != curthread->td_ucred->cr_prison)
954 kp->ki_jid = cred->cr_prison->pr_id;
956 strlcpy(kp->ki_loginclass, cred->cr_loginclass->lc_name,
957 sizeof(kp->ki_loginclass));
961 mtx_lock(&ps->ps_mtx);
962 kp->ki_sigignore = ps->ps_sigignore;
963 kp->ki_sigcatch = ps->ps_sigcatch;
964 mtx_unlock(&ps->ps_mtx);
966 if (p->p_state != PRS_NEW &&
967 p->p_state != PRS_ZOMBIE &&
968 p->p_vmspace != NULL) {
969 struct vmspace *vm = p->p_vmspace;
971 kp->ki_size = vm->vm_map.size;
972 kp->ki_rssize = vmspace_resident_count(vm); /*XXX*/
973 FOREACH_THREAD_IN_PROC(p, td0) {
974 if (!TD_IS_SWAPPED(td0))
975 kp->ki_rssize += td0->td_kstack_pages;
977 kp->ki_swrss = vm->vm_swrss;
978 kp->ki_tsize = vm->vm_tsize;
979 kp->ki_dsize = vm->vm_dsize;
980 kp->ki_ssize = vm->vm_ssize;
981 } else if (p->p_state == PRS_ZOMBIE)
983 if (kp->ki_flag & P_INMEM)
984 kp->ki_sflag = PS_INMEM;
987 /* Calculate legacy swtime as seconds since 'swtick'. */
988 kp->ki_swtime = (ticks - p->p_swtick) / hz;
989 kp->ki_pid = p->p_pid;
990 kp->ki_nice = p->p_nice;
991 kp->ki_fibnum = p->p_fibnum;
992 kp->ki_start = p->p_stats->p_start;
993 getboottime(&boottime);
994 timevaladd(&kp->ki_start, &boottime);
996 rufetch(p, &kp->ki_rusage);
997 kp->ki_runtime = cputick2usec(p->p_rux.rux_runtime);
998 calcru(p, &kp->ki_rusage.ru_utime, &kp->ki_rusage.ru_stime);
1000 calccru(p, &kp->ki_childutime, &kp->ki_childstime);
1001 /* Some callers want child times in a single value. */
1002 kp->ki_childtime = kp->ki_childstime;
1003 timevaladd(&kp->ki_childtime, &kp->ki_childutime);
1005 FOREACH_THREAD_IN_PROC(p, td0)
1006 kp->ki_cow += td0->td_cow;
1010 kp->ki_pgid = p->p_pgrp->pg_id;
1011 kp->ki_jobc = p->p_pgrp->pg_jobc;
1012 sp = p->p_pgrp->pg_session;
1015 kp->ki_sid = sp->s_sid;
1017 strlcpy(kp->ki_login, sp->s_login,
1018 sizeof(kp->ki_login));
1020 kp->ki_kiflag |= KI_CTTY;
1022 kp->ki_kiflag |= KI_SLEADER;
1023 /* XXX proctree_lock */
1028 if ((p->p_flag & P_CONTROLT) && tp != NULL) {
1029 kp->ki_tdev = tty_udev(tp);
1030 kp->ki_tdev_freebsd11 = kp->ki_tdev; /* truncate */
1031 kp->ki_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
1033 kp->ki_tsid = tp->t_session->s_sid;
1035 kp->ki_tdev = NODEV;
1036 kp->ki_tdev_freebsd11 = kp->ki_tdev; /* truncate */
1038 if (p->p_comm[0] != '\0')
1039 strlcpy(kp->ki_comm, p->p_comm, sizeof(kp->ki_comm));
1040 if (p->p_sysent && p->p_sysent->sv_name != NULL &&
1041 p->p_sysent->sv_name[0] != '\0')
1042 strlcpy(kp->ki_emul, p->p_sysent->sv_name, sizeof(kp->ki_emul));
1043 kp->ki_siglist = p->p_siglist;
1044 kp->ki_xstat = KW_EXITCODE(p->p_xexit, p->p_xsig);
1045 kp->ki_acflag = p->p_acflag;
1046 kp->ki_lock = p->p_lock;
1048 kp->ki_ppid = proc_realparent(p)->p_pid;
1049 if (p->p_flag & P_TRACED)
1050 kp->ki_tracer = p->p_pptr->p_pid;
1055 * Fill in information that is thread specific. Must be called with
1056 * target process locked. If 'preferthread' is set, overwrite certain
1057 * process-related fields that are maintained for both threads and
1061 fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp, int preferthread)
1067 PROC_LOCK_ASSERT(p, MA_OWNED);
1072 if (td->td_wmesg != NULL)
1073 strlcpy(kp->ki_wmesg, td->td_wmesg, sizeof(kp->ki_wmesg));
1075 bzero(kp->ki_wmesg, sizeof(kp->ki_wmesg));
1076 if (strlcpy(kp->ki_tdname, td->td_name, sizeof(kp->ki_tdname)) >=
1077 sizeof(kp->ki_tdname)) {
1078 strlcpy(kp->ki_moretdname,
1079 td->td_name + sizeof(kp->ki_tdname) - 1,
1080 sizeof(kp->ki_moretdname));
1082 bzero(kp->ki_moretdname, sizeof(kp->ki_moretdname));
1084 if (TD_ON_LOCK(td)) {
1085 kp->ki_kiflag |= KI_LOCKBLOCK;
1086 strlcpy(kp->ki_lockname, td->td_lockname,
1087 sizeof(kp->ki_lockname));
1089 kp->ki_kiflag &= ~KI_LOCKBLOCK;
1090 bzero(kp->ki_lockname, sizeof(kp->ki_lockname));
1093 if (p->p_state == PRS_NORMAL) { /* approximate. */
1094 if (TD_ON_RUNQ(td) ||
1096 TD_IS_RUNNING(td)) {
1098 } else if (P_SHOULDSTOP(p)) {
1099 kp->ki_stat = SSTOP;
1100 } else if (TD_IS_SLEEPING(td)) {
1101 kp->ki_stat = SSLEEP;
1102 } else if (TD_ON_LOCK(td)) {
1103 kp->ki_stat = SLOCK;
1105 kp->ki_stat = SWAIT;
1107 } else if (p->p_state == PRS_ZOMBIE) {
1108 kp->ki_stat = SZOMB;
1113 /* Things in the thread */
1114 kp->ki_wchan = td->td_wchan;
1115 kp->ki_pri.pri_level = td->td_priority;
1116 kp->ki_pri.pri_native = td->td_base_pri;
1119 * Note: legacy fields; clamp at the old NOCPU value and/or
1120 * the maximum u_char CPU value.
1122 if (td->td_lastcpu == NOCPU)
1123 kp->ki_lastcpu_old = NOCPU_OLD;
1124 else if (td->td_lastcpu > MAXCPU_OLD)
1125 kp->ki_lastcpu_old = MAXCPU_OLD;
1127 kp->ki_lastcpu_old = td->td_lastcpu;
1129 if (td->td_oncpu == NOCPU)
1130 kp->ki_oncpu_old = NOCPU_OLD;
1131 else if (td->td_oncpu > MAXCPU_OLD)
1132 kp->ki_oncpu_old = MAXCPU_OLD;
1134 kp->ki_oncpu_old = td->td_oncpu;
1136 kp->ki_lastcpu = td->td_lastcpu;
1137 kp->ki_oncpu = td->td_oncpu;
1138 kp->ki_tdflags = td->td_flags;
1139 kp->ki_tid = td->td_tid;
1140 kp->ki_numthreads = p->p_numthreads;
1141 kp->ki_pcb = td->td_pcb;
1142 kp->ki_kstack = (void *)td->td_kstack;
1143 kp->ki_slptime = (ticks - td->td_slptick) / hz;
1144 kp->ki_pri.pri_class = td->td_pri_class;
1145 kp->ki_pri.pri_user = td->td_user_pri;
1148 rufetchtd(td, &kp->ki_rusage);
1149 kp->ki_runtime = cputick2usec(td->td_rux.rux_runtime);
1150 kp->ki_pctcpu = sched_pctcpu(td);
1151 kp->ki_estcpu = sched_estcpu(td);
1152 kp->ki_cow = td->td_cow;
1155 /* We can't get this anymore but ps etc never used it anyway. */
1159 kp->ki_siglist = td->td_siglist;
1160 kp->ki_sigmask = td->td_sigmask;
1167 * Fill in a kinfo_proc structure for the specified process.
1168 * Must be called with the target process locked.
1171 fill_kinfo_proc(struct proc *p, struct kinfo_proc *kp)
1174 MPASS(FIRST_THREAD_IN_PROC(p) != NULL);
1176 fill_kinfo_proc_only(p, kp);
1177 fill_kinfo_thread(FIRST_THREAD_IN_PROC(p), kp, 0);
1178 fill_kinfo_aggregate(p, kp);
1185 return (malloc(sizeof(struct pstats), M_SUBPROC, M_ZERO|M_WAITOK));
1189 * Copy parts of p_stats; zero the rest of p_stats (statistics).
1192 pstats_fork(struct pstats *src, struct pstats *dst)
1195 bzero(&dst->pstat_startzero,
1196 __rangeof(struct pstats, pstat_startzero, pstat_endzero));
1197 bcopy(&src->pstat_startcopy, &dst->pstat_startcopy,
1198 __rangeof(struct pstats, pstat_startcopy, pstat_endcopy));
1202 pstats_free(struct pstats *ps)
1205 free(ps, M_SUBPROC);
1208 static struct proc *
1209 zpfind_locked(pid_t pid)
1213 sx_assert(&allproc_lock, SX_LOCKED);
1214 LIST_FOREACH(p, &zombproc, p_list) {
1215 if (p->p_pid == pid) {
1224 * Locate a zombie process by number
1231 sx_slock(&allproc_lock);
1232 p = zpfind_locked(pid);
1233 sx_sunlock(&allproc_lock);
1237 #ifdef COMPAT_FREEBSD32
1240 * This function is typically used to copy out the kernel address, so
1241 * it can be replaced by assignment of zero.
1243 static inline uint32_t
1244 ptr32_trim(void *ptr)
1248 uptr = (uintptr_t)ptr;
1249 return ((uptr > UINT_MAX) ? 0 : uptr);
1252 #define PTRTRIM_CP(src,dst,fld) \
1253 do { (dst).fld = ptr32_trim((src).fld); } while (0)
1256 freebsd32_kinfo_proc_out(const struct kinfo_proc *ki, struct kinfo_proc32 *ki32)
1260 bzero(ki32, sizeof(struct kinfo_proc32));
1261 ki32->ki_structsize = sizeof(struct kinfo_proc32);
1262 CP(*ki, *ki32, ki_layout);
1263 PTRTRIM_CP(*ki, *ki32, ki_args);
1264 PTRTRIM_CP(*ki, *ki32, ki_paddr);
1265 PTRTRIM_CP(*ki, *ki32, ki_addr);
1266 PTRTRIM_CP(*ki, *ki32, ki_tracep);
1267 PTRTRIM_CP(*ki, *ki32, ki_textvp);
1268 PTRTRIM_CP(*ki, *ki32, ki_fd);
1269 PTRTRIM_CP(*ki, *ki32, ki_vmspace);
1270 PTRTRIM_CP(*ki, *ki32, ki_wchan);
1271 CP(*ki, *ki32, ki_pid);
1272 CP(*ki, *ki32, ki_ppid);
1273 CP(*ki, *ki32, ki_pgid);
1274 CP(*ki, *ki32, ki_tpgid);
1275 CP(*ki, *ki32, ki_sid);
1276 CP(*ki, *ki32, ki_tsid);
1277 CP(*ki, *ki32, ki_jobc);
1278 CP(*ki, *ki32, ki_tdev);
1279 CP(*ki, *ki32, ki_tdev_freebsd11);
1280 CP(*ki, *ki32, ki_siglist);
1281 CP(*ki, *ki32, ki_sigmask);
1282 CP(*ki, *ki32, ki_sigignore);
1283 CP(*ki, *ki32, ki_sigcatch);
1284 CP(*ki, *ki32, ki_uid);
1285 CP(*ki, *ki32, ki_ruid);
1286 CP(*ki, *ki32, ki_svuid);
1287 CP(*ki, *ki32, ki_rgid);
1288 CP(*ki, *ki32, ki_svgid);
1289 CP(*ki, *ki32, ki_ngroups);
1290 for (i = 0; i < KI_NGROUPS; i++)
1291 CP(*ki, *ki32, ki_groups[i]);
1292 CP(*ki, *ki32, ki_size);
1293 CP(*ki, *ki32, ki_rssize);
1294 CP(*ki, *ki32, ki_swrss);
1295 CP(*ki, *ki32, ki_tsize);
1296 CP(*ki, *ki32, ki_dsize);
1297 CP(*ki, *ki32, ki_ssize);
1298 CP(*ki, *ki32, ki_xstat);
1299 CP(*ki, *ki32, ki_acflag);
1300 CP(*ki, *ki32, ki_pctcpu);
1301 CP(*ki, *ki32, ki_estcpu);
1302 CP(*ki, *ki32, ki_slptime);
1303 CP(*ki, *ki32, ki_swtime);
1304 CP(*ki, *ki32, ki_cow);
1305 CP(*ki, *ki32, ki_runtime);
1306 TV_CP(*ki, *ki32, ki_start);
1307 TV_CP(*ki, *ki32, ki_childtime);
1308 CP(*ki, *ki32, ki_flag);
1309 CP(*ki, *ki32, ki_kiflag);
1310 CP(*ki, *ki32, ki_traceflag);
1311 CP(*ki, *ki32, ki_stat);
1312 CP(*ki, *ki32, ki_nice);
1313 CP(*ki, *ki32, ki_lock);
1314 CP(*ki, *ki32, ki_rqindex);
1315 CP(*ki, *ki32, ki_oncpu);
1316 CP(*ki, *ki32, ki_lastcpu);
1318 /* XXX TODO: wrap cpu value as appropriate */
1319 CP(*ki, *ki32, ki_oncpu_old);
1320 CP(*ki, *ki32, ki_lastcpu_old);
1322 bcopy(ki->ki_tdname, ki32->ki_tdname, TDNAMLEN + 1);
1323 bcopy(ki->ki_wmesg, ki32->ki_wmesg, WMESGLEN + 1);
1324 bcopy(ki->ki_login, ki32->ki_login, LOGNAMELEN + 1);
1325 bcopy(ki->ki_lockname, ki32->ki_lockname, LOCKNAMELEN + 1);
1326 bcopy(ki->ki_comm, ki32->ki_comm, COMMLEN + 1);
1327 bcopy(ki->ki_emul, ki32->ki_emul, KI_EMULNAMELEN + 1);
1328 bcopy(ki->ki_loginclass, ki32->ki_loginclass, LOGINCLASSLEN + 1);
1329 bcopy(ki->ki_moretdname, ki32->ki_moretdname, MAXCOMLEN - TDNAMLEN + 1);
1330 CP(*ki, *ki32, ki_tracer);
1331 CP(*ki, *ki32, ki_flag2);
1332 CP(*ki, *ki32, ki_fibnum);
1333 CP(*ki, *ki32, ki_cr_flags);
1334 CP(*ki, *ki32, ki_jid);
1335 CP(*ki, *ki32, ki_numthreads);
1336 CP(*ki, *ki32, ki_tid);
1337 CP(*ki, *ki32, ki_pri);
1338 freebsd32_rusage_out(&ki->ki_rusage, &ki32->ki_rusage);
1339 freebsd32_rusage_out(&ki->ki_rusage_ch, &ki32->ki_rusage_ch);
1340 PTRTRIM_CP(*ki, *ki32, ki_pcb);
1341 PTRTRIM_CP(*ki, *ki32, ki_kstack);
1342 PTRTRIM_CP(*ki, *ki32, ki_udata);
1343 PTRTRIM_CP(*ki, *ki32, ki_tdaddr);
1344 CP(*ki, *ki32, ki_sflag);
1345 CP(*ki, *ki32, ki_tdflags);
1350 kern_proc_out_size(struct proc *p, int flags)
1354 PROC_LOCK_ASSERT(p, MA_OWNED);
1356 if ((flags & KERN_PROC_NOTHREADS) != 0) {
1357 #ifdef COMPAT_FREEBSD32
1358 if ((flags & KERN_PROC_MASK32) != 0) {
1359 size += sizeof(struct kinfo_proc32);
1362 size += sizeof(struct kinfo_proc);
1364 #ifdef COMPAT_FREEBSD32
1365 if ((flags & KERN_PROC_MASK32) != 0)
1366 size += sizeof(struct kinfo_proc32) * p->p_numthreads;
1369 size += sizeof(struct kinfo_proc) * p->p_numthreads;
1376 kern_proc_out(struct proc *p, struct sbuf *sb, int flags)
1379 struct kinfo_proc ki;
1380 #ifdef COMPAT_FREEBSD32
1381 struct kinfo_proc32 ki32;
1385 PROC_LOCK_ASSERT(p, MA_OWNED);
1386 MPASS(FIRST_THREAD_IN_PROC(p) != NULL);
1389 fill_kinfo_proc(p, &ki);
1390 if ((flags & KERN_PROC_NOTHREADS) != 0) {
1391 #ifdef COMPAT_FREEBSD32
1392 if ((flags & KERN_PROC_MASK32) != 0) {
1393 freebsd32_kinfo_proc_out(&ki, &ki32);
1394 if (sbuf_bcat(sb, &ki32, sizeof(ki32)) != 0)
1398 if (sbuf_bcat(sb, &ki, sizeof(ki)) != 0)
1401 FOREACH_THREAD_IN_PROC(p, td) {
1402 fill_kinfo_thread(td, &ki, 1);
1403 #ifdef COMPAT_FREEBSD32
1404 if ((flags & KERN_PROC_MASK32) != 0) {
1405 freebsd32_kinfo_proc_out(&ki, &ki32);
1406 if (sbuf_bcat(sb, &ki32, sizeof(ki32)) != 0)
1410 if (sbuf_bcat(sb, &ki, sizeof(ki)) != 0)
1421 sysctl_out_proc(struct proc *p, struct sysctl_req *req, int flags)
1424 struct kinfo_proc ki;
1427 if (req->oldptr == NULL)
1428 return (SYSCTL_OUT(req, 0, kern_proc_out_size(p, flags)));
1430 sbuf_new_for_sysctl(&sb, (char *)&ki, sizeof(ki), req);
1431 sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
1432 error = kern_proc_out(p, &sb, flags);
1433 error2 = sbuf_finish(&sb);
1437 else if (error2 != 0)
1443 sysctl_kern_proc(SYSCTL_HANDLER_ARGS)
1445 int *name = (int *)arg1;
1446 u_int namelen = arg2;
1448 int flags, doingzomb, oid_number;
1451 oid_number = oidp->oid_number;
1452 if (oid_number != KERN_PROC_ALL &&
1453 (oid_number & KERN_PROC_INC_THREAD) == 0)
1454 flags = KERN_PROC_NOTHREADS;
1457 oid_number &= ~KERN_PROC_INC_THREAD;
1459 #ifdef COMPAT_FREEBSD32
1460 if (req->flags & SCTL_MASK32)
1461 flags |= KERN_PROC_MASK32;
1463 if (oid_number == KERN_PROC_PID) {
1466 error = sysctl_wire_old_buffer(req, 0);
1469 sx_slock(&proctree_lock);
1470 error = pget((pid_t)name[0], PGET_CANSEE, &p);
1472 error = sysctl_out_proc(p, req, flags);
1473 sx_sunlock(&proctree_lock);
1477 switch (oid_number) {
1482 case KERN_PROC_PROC:
1483 if (namelen != 0 && namelen != 1)
1492 if (req->oldptr == NULL) {
1493 /* overestimate by 5 procs */
1494 error = SYSCTL_OUT(req, 0, sizeof (struct kinfo_proc) * 5);
1498 error = sysctl_wire_old_buffer(req, 0);
1502 * This lock is only needed to safely grab the parent of a
1503 * traced process. Only grab it if we are producing any
1504 * data to begin with.
1506 sx_slock(&proctree_lock);
1508 sx_slock(&allproc_lock);
1509 for (doingzomb=0 ; doingzomb < 2 ; doingzomb++) {
1511 p = LIST_FIRST(&allproc);
1513 p = LIST_FIRST(&zombproc);
1514 for (; p != NULL; p = LIST_NEXT(p, p_list)) {
1516 * Skip embryonic processes.
1518 if (p->p_state == PRS_NEW)
1521 KASSERT(p->p_ucred != NULL,
1522 ("process credential is NULL for non-NEW proc"));
1524 * Show a user only appropriate processes.
1526 if (p_cansee(curthread, p)) {
1531 * TODO - make more efficient (see notes below).
1534 switch (oid_number) {
1537 if (p->p_ucred->cr_gid != (gid_t)name[0]) {
1543 case KERN_PROC_PGRP:
1544 /* could do this by traversing pgrp */
1545 if (p->p_pgrp == NULL ||
1546 p->p_pgrp->pg_id != (pid_t)name[0]) {
1552 case KERN_PROC_RGID:
1553 if (p->p_ucred->cr_rgid != (gid_t)name[0]) {
1559 case KERN_PROC_SESSION:
1560 if (p->p_session == NULL ||
1561 p->p_session->s_sid != (pid_t)name[0]) {
1568 if ((p->p_flag & P_CONTROLT) == 0 ||
1569 p->p_session == NULL) {
1573 /* XXX proctree_lock */
1574 SESS_LOCK(p->p_session);
1575 if (p->p_session->s_ttyp == NULL ||
1576 tty_udev(p->p_session->s_ttyp) !=
1578 SESS_UNLOCK(p->p_session);
1582 SESS_UNLOCK(p->p_session);
1586 if (p->p_ucred->cr_uid != (uid_t)name[0]) {
1592 case KERN_PROC_RUID:
1593 if (p->p_ucred->cr_ruid != (uid_t)name[0]) {
1599 case KERN_PROC_PROC:
1607 error = sysctl_out_proc(p, req, flags);
1613 sx_sunlock(&allproc_lock);
1614 if (req->oldptr != NULL)
1615 sx_sunlock(&proctree_lock);
1620 pargs_alloc(int len)
1624 pa = malloc(sizeof(struct pargs) + len, M_PARGS,
1626 refcount_init(&pa->ar_ref, 1);
1627 pa->ar_length = len;
1632 pargs_free(struct pargs *pa)
1639 pargs_hold(struct pargs *pa)
1644 refcount_acquire(&pa->ar_ref);
1648 pargs_drop(struct pargs *pa)
1653 if (refcount_release(&pa->ar_ref))
1658 proc_read_string(struct thread *td, struct proc *p, const char *sptr, char *buf,
1664 * This may return a short read if the string is shorter than the chunk
1665 * and is aligned at the end of the page, and the following page is not
1668 n = proc_readmem(td, p, (vm_offset_t)sptr, buf, len);
1674 #define PROC_AUXV_MAX 256 /* Safety limit on auxv size. */
1676 enum proc_vector_type {
1682 #ifdef COMPAT_FREEBSD32
1684 get_proc_vector32(struct thread *td, struct proc *p, char ***proc_vectorp,
1685 size_t *vsizep, enum proc_vector_type type)
1687 struct freebsd32_ps_strings pss;
1689 vm_offset_t vptr, ptr;
1690 uint32_t *proc_vector32;
1696 if (proc_readmem(td, p, (vm_offset_t)p->p_sysent->sv_psstrings, &pss,
1697 sizeof(pss)) != sizeof(pss))
1701 vptr = (vm_offset_t)PTRIN(pss.ps_argvstr);
1702 vsize = pss.ps_nargvstr;
1703 if (vsize > ARG_MAX)
1705 size = vsize * sizeof(int32_t);
1708 vptr = (vm_offset_t)PTRIN(pss.ps_envstr);
1709 vsize = pss.ps_nenvstr;
1710 if (vsize > ARG_MAX)
1712 size = vsize * sizeof(int32_t);
1715 vptr = (vm_offset_t)PTRIN(pss.ps_envstr) +
1716 (pss.ps_nenvstr + 1) * sizeof(int32_t);
1719 for (ptr = vptr, i = 0; i < PROC_AUXV_MAX; i++) {
1720 if (proc_readmem(td, p, ptr, &aux, sizeof(aux)) !=
1723 if (aux.a_type == AT_NULL)
1727 if (aux.a_type != AT_NULL)
1730 size = vsize * sizeof(aux);
1733 KASSERT(0, ("Wrong proc vector type: %d", type));
1736 proc_vector32 = malloc(size, M_TEMP, M_WAITOK);
1737 if (proc_readmem(td, p, vptr, proc_vector32, size) != size) {
1741 if (type == PROC_AUX) {
1742 *proc_vectorp = (char **)proc_vector32;
1746 proc_vector = malloc(vsize * sizeof(char *), M_TEMP, M_WAITOK);
1747 for (i = 0; i < (int)vsize; i++)
1748 proc_vector[i] = PTRIN(proc_vector32[i]);
1749 *proc_vectorp = proc_vector;
1752 free(proc_vector32, M_TEMP);
1758 get_proc_vector(struct thread *td, struct proc *p, char ***proc_vectorp,
1759 size_t *vsizep, enum proc_vector_type type)
1761 struct ps_strings pss;
1763 vm_offset_t vptr, ptr;
1768 #ifdef COMPAT_FREEBSD32
1769 if (SV_PROC_FLAG(p, SV_ILP32) != 0)
1770 return (get_proc_vector32(td, p, proc_vectorp, vsizep, type));
1772 if (proc_readmem(td, p, (vm_offset_t)p->p_sysent->sv_psstrings, &pss,
1773 sizeof(pss)) != sizeof(pss))
1777 vptr = (vm_offset_t)pss.ps_argvstr;
1778 vsize = pss.ps_nargvstr;
1779 if (vsize > ARG_MAX)
1781 size = vsize * sizeof(char *);
1784 vptr = (vm_offset_t)pss.ps_envstr;
1785 vsize = pss.ps_nenvstr;
1786 if (vsize > ARG_MAX)
1788 size = vsize * sizeof(char *);
1792 * The aux array is just above env array on the stack. Check
1793 * that the address is naturally aligned.
1795 vptr = (vm_offset_t)pss.ps_envstr + (pss.ps_nenvstr + 1)
1797 #if __ELF_WORD_SIZE == 64
1798 if (vptr % sizeof(uint64_t) != 0)
1800 if (vptr % sizeof(uint32_t) != 0)
1804 * We count the array size reading the aux vectors from the
1805 * stack until AT_NULL vector is returned. So (to keep the code
1806 * simple) we read the process stack twice: the first time here
1807 * to find the size and the second time when copying the vectors
1808 * to the allocated proc_vector.
1810 for (ptr = vptr, i = 0; i < PROC_AUXV_MAX; i++) {
1811 if (proc_readmem(td, p, ptr, &aux, sizeof(aux)) !=
1814 if (aux.a_type == AT_NULL)
1819 * If the PROC_AUXV_MAX entries are iterated over, and we have
1820 * not reached AT_NULL, it is most likely we are reading wrong
1821 * data: either the process doesn't have auxv array or data has
1822 * been modified. Return the error in this case.
1824 if (aux.a_type != AT_NULL)
1827 size = vsize * sizeof(aux);
1830 KASSERT(0, ("Wrong proc vector type: %d", type));
1831 return (EINVAL); /* In case we are built without INVARIANTS. */
1833 proc_vector = malloc(size, M_TEMP, M_WAITOK);
1834 if (proc_readmem(td, p, vptr, proc_vector, size) != size) {
1835 free(proc_vector, M_TEMP);
1838 *proc_vectorp = proc_vector;
1844 #define GET_PS_STRINGS_CHUNK_SZ 256 /* Chunk size (bytes) for ps_strings operations. */
1847 get_ps_strings(struct thread *td, struct proc *p, struct sbuf *sb,
1848 enum proc_vector_type type)
1850 size_t done, len, nchr, vsize;
1852 char **proc_vector, *sptr;
1853 char pss_string[GET_PS_STRINGS_CHUNK_SZ];
1855 PROC_ASSERT_HELD(p);
1858 * We are not going to read more than 2 * (PATH_MAX + ARG_MAX) bytes.
1860 nchr = 2 * (PATH_MAX + ARG_MAX);
1862 error = get_proc_vector(td, p, &proc_vector, &vsize, type);
1865 for (done = 0, i = 0; i < (int)vsize && done < nchr; i++) {
1867 * The program may have scribbled into its argv array, e.g. to
1868 * remove some arguments. If that has happened, break out
1869 * before trying to read from NULL.
1871 if (proc_vector[i] == NULL)
1873 for (sptr = proc_vector[i]; ; sptr += GET_PS_STRINGS_CHUNK_SZ) {
1874 error = proc_read_string(td, p, sptr, pss_string,
1875 sizeof(pss_string));
1878 len = strnlen(pss_string, GET_PS_STRINGS_CHUNK_SZ);
1879 if (done + len >= nchr)
1880 len = nchr - done - 1;
1881 sbuf_bcat(sb, pss_string, len);
1882 if (len != GET_PS_STRINGS_CHUNK_SZ)
1884 done += GET_PS_STRINGS_CHUNK_SZ;
1886 sbuf_bcat(sb, "", 1);
1890 free(proc_vector, M_TEMP);
1895 proc_getargv(struct thread *td, struct proc *p, struct sbuf *sb)
1898 return (get_ps_strings(curthread, p, sb, PROC_ARG));
1902 proc_getenvv(struct thread *td, struct proc *p, struct sbuf *sb)
1905 return (get_ps_strings(curthread, p, sb, PROC_ENV));
1909 proc_getauxv(struct thread *td, struct proc *p, struct sbuf *sb)
1915 error = get_proc_vector(td, p, &auxv, &vsize, PROC_AUX);
1917 #ifdef COMPAT_FREEBSD32
1918 if (SV_PROC_FLAG(p, SV_ILP32) != 0)
1919 size = vsize * sizeof(Elf32_Auxinfo);
1922 size = vsize * sizeof(Elf_Auxinfo);
1923 if (sbuf_bcat(sb, auxv, size) != 0)
1931 * This sysctl allows a process to retrieve the argument list or process
1932 * title for another process without groping around in the address space
1933 * of the other process. It also allow a process to set its own "process
1934 * title to a string of its own choice.
1937 sysctl_kern_proc_args(SYSCTL_HANDLER_ARGS)
1939 int *name = (int *)arg1;
1940 u_int namelen = arg2;
1941 struct pargs *newpa, *pa;
1944 int flags, error = 0, error2;
1950 pid = (pid_t)name[0];
1952 * If the query is for this process and it is single-threaded, there
1953 * is nobody to modify pargs, thus we can just read.
1956 if (pid == p->p_pid && p->p_numthreads == 1 && req->newptr == NULL &&
1957 (pa = p->p_args) != NULL)
1958 return (SYSCTL_OUT(req, pa->ar_args, pa->ar_length));
1960 flags = PGET_CANSEE;
1961 if (req->newptr != NULL)
1962 flags |= PGET_ISCURRENT;
1963 error = pget(pid, flags, &p);
1971 error = SYSCTL_OUT(req, pa->ar_args, pa->ar_length);
1973 } else if ((p->p_flag & (P_WEXIT | P_SYSTEM)) == 0) {
1976 sbuf_new_for_sysctl(&sb, NULL, GET_PS_STRINGS_CHUNK_SZ, req);
1977 sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
1978 error = proc_getargv(curthread, p, &sb);
1979 error2 = sbuf_finish(&sb);
1982 if (error == 0 && error2 != 0)
1987 if (error != 0 || req->newptr == NULL)
1990 if (req->newlen > ps_arg_cache_limit - sizeof(struct pargs))
1992 newpa = pargs_alloc(req->newlen);
1993 error = SYSCTL_IN(req, newpa->ar_args, req->newlen);
2007 * This sysctl allows a process to retrieve environment of another process.
2010 sysctl_kern_proc_env(SYSCTL_HANDLER_ARGS)
2012 int *name = (int *)arg1;
2013 u_int namelen = arg2;
2021 error = pget((pid_t)name[0], PGET_WANTREAD, &p);
2024 if ((p->p_flag & P_SYSTEM) != 0) {
2029 sbuf_new_for_sysctl(&sb, NULL, GET_PS_STRINGS_CHUNK_SZ, req);
2030 sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
2031 error = proc_getenvv(curthread, p, &sb);
2032 error2 = sbuf_finish(&sb);
2035 return (error != 0 ? error : error2);
2039 * This sysctl allows a process to retrieve ELF auxiliary vector of
2043 sysctl_kern_proc_auxv(SYSCTL_HANDLER_ARGS)
2045 int *name = (int *)arg1;
2046 u_int namelen = arg2;
2054 error = pget((pid_t)name[0], PGET_WANTREAD, &p);
2057 if ((p->p_flag & P_SYSTEM) != 0) {
2061 sbuf_new_for_sysctl(&sb, NULL, GET_PS_STRINGS_CHUNK_SZ, req);
2062 sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
2063 error = proc_getauxv(curthread, p, &sb);
2064 error2 = sbuf_finish(&sb);
2067 return (error != 0 ? error : error2);
2071 * This sysctl allows a process to retrieve the path of the executable for
2072 * itself or another process.
2075 sysctl_kern_proc_pathname(SYSCTL_HANDLER_ARGS)
2077 pid_t *pidp = (pid_t *)arg1;
2078 unsigned int arglen = arg2;
2081 char *retbuf, *freebuf;
2086 if (*pidp == -1) { /* -1 means this process */
2087 p = req->td->td_proc;
2089 error = pget(*pidp, PGET_CANSEE, &p);
2103 error = vn_fullpath(req->td, vp, &retbuf, &freebuf);
2107 error = SYSCTL_OUT(req, retbuf, strlen(retbuf) + 1);
2108 free(freebuf, M_TEMP);
2113 sysctl_kern_proc_sv_name(SYSCTL_HANDLER_ARGS)
2126 error = pget((pid_t)name[0], PGET_CANSEE, &p);
2129 sv_name = p->p_sysent->sv_name;
2131 return (sysctl_handle_string(oidp, sv_name, 0, req));
2134 #ifdef KINFO_OVMENTRY_SIZE
2135 CTASSERT(sizeof(struct kinfo_ovmentry) == KINFO_OVMENTRY_SIZE);
2138 #ifdef COMPAT_FREEBSD7
2140 sysctl_kern_proc_ovmmap(SYSCTL_HANDLER_ARGS)
2142 vm_map_entry_t entry, tmp_entry;
2143 unsigned int last_timestamp;
2144 char *fullpath, *freepath;
2145 struct kinfo_ovmentry *kve;
2155 error = pget((pid_t)name[0], PGET_WANTREAD, &p);
2158 vm = vmspace_acquire_ref(p);
2163 kve = malloc(sizeof(*kve), M_TEMP, M_WAITOK);
2166 vm_map_lock_read(map);
2167 for (entry = map->header.next; entry != &map->header;
2168 entry = entry->next) {
2169 vm_object_t obj, tobj, lobj;
2172 if (entry->eflags & MAP_ENTRY_IS_SUB_MAP)
2175 bzero(kve, sizeof(*kve));
2176 kve->kve_structsize = sizeof(*kve);
2178 kve->kve_private_resident = 0;
2179 obj = entry->object.vm_object;
2181 VM_OBJECT_RLOCK(obj);
2182 if (obj->shadow_count == 1)
2183 kve->kve_private_resident =
2184 obj->resident_page_count;
2186 kve->kve_resident = 0;
2187 addr = entry->start;
2188 while (addr < entry->end) {
2189 if (pmap_extract(map->pmap, addr))
2190 kve->kve_resident++;
2194 for (lobj = tobj = obj; tobj; tobj = tobj->backing_object) {
2196 VM_OBJECT_RLOCK(tobj);
2197 kve->kve_offset += tobj->backing_object_offset;
2200 VM_OBJECT_RUNLOCK(lobj);
2204 kve->kve_start = (void*)entry->start;
2205 kve->kve_end = (void*)entry->end;
2206 kve->kve_offset += (off_t)entry->offset;
2208 if (entry->protection & VM_PROT_READ)
2209 kve->kve_protection |= KVME_PROT_READ;
2210 if (entry->protection & VM_PROT_WRITE)
2211 kve->kve_protection |= KVME_PROT_WRITE;
2212 if (entry->protection & VM_PROT_EXECUTE)
2213 kve->kve_protection |= KVME_PROT_EXEC;
2215 if (entry->eflags & MAP_ENTRY_COW)
2216 kve->kve_flags |= KVME_FLAG_COW;
2217 if (entry->eflags & MAP_ENTRY_NEEDS_COPY)
2218 kve->kve_flags |= KVME_FLAG_NEEDS_COPY;
2219 if (entry->eflags & MAP_ENTRY_NOCOREDUMP)
2220 kve->kve_flags |= KVME_FLAG_NOCOREDUMP;
2222 last_timestamp = map->timestamp;
2223 vm_map_unlock_read(map);
2225 kve->kve_fileid = 0;
2231 switch (lobj->type) {
2233 kve->kve_type = KVME_TYPE_DEFAULT;
2236 kve->kve_type = KVME_TYPE_VNODE;
2241 if ((lobj->flags & OBJ_TMPFS_NODE) != 0) {
2242 kve->kve_type = KVME_TYPE_VNODE;
2243 if ((lobj->flags & OBJ_TMPFS) != 0) {
2244 vp = lobj->un_pager.swp.swp_tmpfs;
2248 kve->kve_type = KVME_TYPE_SWAP;
2252 kve->kve_type = KVME_TYPE_DEVICE;
2255 kve->kve_type = KVME_TYPE_PHYS;
2258 kve->kve_type = KVME_TYPE_DEAD;
2261 kve->kve_type = KVME_TYPE_SG;
2264 kve->kve_type = KVME_TYPE_UNKNOWN;
2268 VM_OBJECT_RUNLOCK(lobj);
2270 kve->kve_ref_count = obj->ref_count;
2271 kve->kve_shadow_count = obj->shadow_count;
2272 VM_OBJECT_RUNLOCK(obj);
2274 vn_fullpath(curthread, vp, &fullpath,
2276 cred = curthread->td_ucred;
2277 vn_lock(vp, LK_SHARED | LK_RETRY);
2278 if (VOP_GETATTR(vp, &va, cred) == 0) {
2279 kve->kve_fileid = va.va_fileid;
2281 kve->kve_fsid = va.va_fsid;
2286 kve->kve_type = KVME_TYPE_NONE;
2287 kve->kve_ref_count = 0;
2288 kve->kve_shadow_count = 0;
2291 strlcpy(kve->kve_path, fullpath, sizeof(kve->kve_path));
2292 if (freepath != NULL)
2293 free(freepath, M_TEMP);
2295 error = SYSCTL_OUT(req, kve, sizeof(*kve));
2296 vm_map_lock_read(map);
2299 if (last_timestamp != map->timestamp) {
2300 vm_map_lookup_entry(map, addr - 1, &tmp_entry);
2304 vm_map_unlock_read(map);
2310 #endif /* COMPAT_FREEBSD7 */
2312 #ifdef KINFO_VMENTRY_SIZE
2313 CTASSERT(sizeof(struct kinfo_vmentry) == KINFO_VMENTRY_SIZE);
2317 kern_proc_vmmap_resident(vm_map_t map, vm_map_entry_t entry,
2318 int *resident_count, bool *super)
2320 vm_object_t obj, tobj;
2323 vm_paddr_t locked_pa;
2324 vm_pindex_t pi, pi_adv, pindex;
2327 *resident_count = 0;
2328 if (vmmap_skip_res_cnt)
2332 obj = entry->object.vm_object;
2333 addr = entry->start;
2335 pi = OFF_TO_IDX(entry->offset);
2336 for (; addr < entry->end; addr += IDX_TO_OFF(pi_adv), pi += pi_adv) {
2337 if (m_adv != NULL) {
2340 pi_adv = atop(entry->end - addr);
2342 for (tobj = obj;; tobj = tobj->backing_object) {
2343 m = vm_page_find_least(tobj, pindex);
2345 if (m->pindex == pindex)
2347 if (pi_adv > m->pindex - pindex) {
2348 pi_adv = m->pindex - pindex;
2352 if (tobj->backing_object == NULL)
2354 pindex += OFF_TO_IDX(tobj->
2355 backing_object_offset);
2359 if (m->psind != 0 && addr + pagesizes[1] <= entry->end &&
2360 (addr & (pagesizes[1] - 1)) == 0 &&
2361 (pmap_mincore(map->pmap, addr, &locked_pa) &
2362 MINCORE_SUPER) != 0) {
2364 pi_adv = atop(pagesizes[1]);
2367 * We do not test the found page on validity.
2368 * Either the page is busy and being paged in,
2369 * or it was invalidated. The first case
2370 * should be counted as resident, the second
2371 * is not so clear; we do account both.
2375 *resident_count += pi_adv;
2378 PA_UNLOCK_COND(locked_pa);
2382 * Must be called with the process locked and will return unlocked.
2385 kern_proc_vmmap_out(struct proc *p, struct sbuf *sb, ssize_t maxlen, int flags)
2387 vm_map_entry_t entry, tmp_entry;
2390 vm_object_t obj, tobj, lobj;
2391 char *fullpath, *freepath;
2392 struct kinfo_vmentry *kve;
2397 unsigned int last_timestamp;
2401 PROC_LOCK_ASSERT(p, MA_OWNED);
2405 vm = vmspace_acquire_ref(p);
2410 kve = malloc(sizeof(*kve), M_TEMP, M_WAITOK | M_ZERO);
2414 vm_map_lock_read(map);
2415 for (entry = map->header.next; entry != &map->header;
2416 entry = entry->next) {
2417 if (entry->eflags & MAP_ENTRY_IS_SUB_MAP)
2421 bzero(kve, sizeof(*kve));
2422 obj = entry->object.vm_object;
2424 for (tobj = obj; tobj != NULL;
2425 tobj = tobj->backing_object) {
2426 VM_OBJECT_RLOCK(tobj);
2427 kve->kve_offset += tobj->backing_object_offset;
2430 if (obj->backing_object == NULL)
2431 kve->kve_private_resident =
2432 obj->resident_page_count;
2433 kern_proc_vmmap_resident(map, entry,
2434 &kve->kve_resident, &super);
2436 kve->kve_flags |= KVME_FLAG_SUPER;
2437 for (tobj = obj; tobj != NULL;
2438 tobj = tobj->backing_object) {
2439 if (tobj != obj && tobj != lobj)
2440 VM_OBJECT_RUNLOCK(tobj);
2446 kve->kve_start = entry->start;
2447 kve->kve_end = entry->end;
2448 kve->kve_offset += entry->offset;
2450 if (entry->protection & VM_PROT_READ)
2451 kve->kve_protection |= KVME_PROT_READ;
2452 if (entry->protection & VM_PROT_WRITE)
2453 kve->kve_protection |= KVME_PROT_WRITE;
2454 if (entry->protection & VM_PROT_EXECUTE)
2455 kve->kve_protection |= KVME_PROT_EXEC;
2457 if (entry->eflags & MAP_ENTRY_COW)
2458 kve->kve_flags |= KVME_FLAG_COW;
2459 if (entry->eflags & MAP_ENTRY_NEEDS_COPY)
2460 kve->kve_flags |= KVME_FLAG_NEEDS_COPY;
2461 if (entry->eflags & MAP_ENTRY_NOCOREDUMP)
2462 kve->kve_flags |= KVME_FLAG_NOCOREDUMP;
2463 if (entry->eflags & MAP_ENTRY_GROWS_UP)
2464 kve->kve_flags |= KVME_FLAG_GROWS_UP;
2465 if (entry->eflags & MAP_ENTRY_GROWS_DOWN)
2466 kve->kve_flags |= KVME_FLAG_GROWS_DOWN;
2468 last_timestamp = map->timestamp;
2469 vm_map_unlock_read(map);
2475 switch (lobj->type) {
2477 kve->kve_type = KVME_TYPE_DEFAULT;
2480 kve->kve_type = KVME_TYPE_VNODE;
2485 if ((lobj->flags & OBJ_TMPFS_NODE) != 0) {
2486 kve->kve_type = KVME_TYPE_VNODE;
2487 if ((lobj->flags & OBJ_TMPFS) != 0) {
2488 vp = lobj->un_pager.swp.swp_tmpfs;
2492 kve->kve_type = KVME_TYPE_SWAP;
2496 kve->kve_type = KVME_TYPE_DEVICE;
2499 kve->kve_type = KVME_TYPE_PHYS;
2502 kve->kve_type = KVME_TYPE_DEAD;
2505 kve->kve_type = KVME_TYPE_SG;
2507 case OBJT_MGTDEVICE:
2508 kve->kve_type = KVME_TYPE_MGTDEVICE;
2511 kve->kve_type = KVME_TYPE_UNKNOWN;
2515 VM_OBJECT_RUNLOCK(lobj);
2517 kve->kve_ref_count = obj->ref_count;
2518 kve->kve_shadow_count = obj->shadow_count;
2519 VM_OBJECT_RUNLOCK(obj);
2521 vn_fullpath(curthread, vp, &fullpath,
2523 kve->kve_vn_type = vntype_to_kinfo(vp->v_type);
2524 cred = curthread->td_ucred;
2525 vn_lock(vp, LK_SHARED | LK_RETRY);
2526 if (VOP_GETATTR(vp, &va, cred) == 0) {
2527 kve->kve_vn_fileid = va.va_fileid;
2528 kve->kve_vn_fsid = va.va_fsid;
2529 kve->kve_vn_fsid_freebsd11 =
2530 kve->kve_vn_fsid; /* truncate */
2532 MAKEIMODE(va.va_type, va.va_mode);
2533 kve->kve_vn_size = va.va_size;
2534 kve->kve_vn_rdev = va.va_rdev;
2535 kve->kve_vn_rdev_freebsd11 =
2536 kve->kve_vn_rdev; /* truncate */
2537 kve->kve_status = KF_ATTR_VALID;
2542 kve->kve_type = KVME_TYPE_NONE;
2543 kve->kve_ref_count = 0;
2544 kve->kve_shadow_count = 0;
2547 strlcpy(kve->kve_path, fullpath, sizeof(kve->kve_path));
2548 if (freepath != NULL)
2549 free(freepath, M_TEMP);
2551 /* Pack record size down */
2552 if ((flags & KERN_VMMAP_PACK_KINFO) != 0)
2553 kve->kve_structsize =
2554 offsetof(struct kinfo_vmentry, kve_path) +
2555 strlen(kve->kve_path) + 1;
2557 kve->kve_structsize = sizeof(*kve);
2558 kve->kve_structsize = roundup(kve->kve_structsize,
2561 /* Halt filling and truncate rather than exceeding maxlen */
2562 if (maxlen != -1 && maxlen < kve->kve_structsize) {
2564 vm_map_lock_read(map);
2566 } else if (maxlen != -1)
2567 maxlen -= kve->kve_structsize;
2569 if (sbuf_bcat(sb, kve, kve->kve_structsize) != 0)
2571 vm_map_lock_read(map);
2574 if (last_timestamp != map->timestamp) {
2575 vm_map_lookup_entry(map, addr - 1, &tmp_entry);
2579 vm_map_unlock_read(map);
2587 sysctl_kern_proc_vmmap(SYSCTL_HANDLER_ARGS)
2591 int error, error2, *name;
2594 sbuf_new_for_sysctl(&sb, NULL, sizeof(struct kinfo_vmentry), req);
2595 sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
2596 error = pget((pid_t)name[0], PGET_CANDEBUG | PGET_NOTWEXIT, &p);
2601 error = kern_proc_vmmap_out(p, &sb, -1, KERN_VMMAP_PACK_KINFO);
2602 error2 = sbuf_finish(&sb);
2604 return (error != 0 ? error : error2);
2607 #if defined(STACK) || defined(DDB)
2609 sysctl_kern_proc_kstack(SYSCTL_HANDLER_ARGS)
2611 struct kinfo_kstack *kkstp;
2612 int error, i, *name, numthreads;
2613 lwpid_t *lwpidarray;
2620 error = pget((pid_t)name[0], PGET_NOTINEXEC | PGET_WANTREAD, &p);
2624 kkstp = malloc(sizeof(*kkstp), M_TEMP, M_WAITOK);
2625 st = stack_create(M_WAITOK);
2630 if (lwpidarray != NULL) {
2631 free(lwpidarray, M_TEMP);
2634 numthreads = p->p_numthreads;
2636 lwpidarray = malloc(sizeof(*lwpidarray) * numthreads, M_TEMP,
2639 } while (numthreads < p->p_numthreads);
2642 * XXXRW: During the below loop, execve(2) and countless other sorts
2643 * of changes could have taken place. Should we check to see if the
2644 * vmspace has been replaced, or the like, in order to prevent
2645 * giving a snapshot that spans, say, execve(2), with some threads
2646 * before and some after? Among other things, the credentials could
2647 * have changed, in which case the right to extract debug info might
2648 * no longer be assured.
2651 FOREACH_THREAD_IN_PROC(p, td) {
2652 KASSERT(i < numthreads,
2653 ("sysctl_kern_proc_kstack: numthreads"));
2654 lwpidarray[i] = td->td_tid;
2658 for (i = 0; i < numthreads; i++) {
2659 td = thread_find(p, lwpidarray[i]);
2663 bzero(kkstp, sizeof(*kkstp));
2664 (void)sbuf_new(&sb, kkstp->kkst_trace,
2665 sizeof(kkstp->kkst_trace), SBUF_FIXEDLEN);
2667 kkstp->kkst_tid = td->td_tid;
2668 if (TD_IS_SWAPPED(td)) {
2669 kkstp->kkst_state = KKST_STATE_SWAPPED;
2670 } else if (TD_IS_RUNNING(td)) {
2671 if (stack_save_td_running(st, td) == 0)
2672 kkstp->kkst_state = KKST_STATE_STACKOK;
2674 kkstp->kkst_state = KKST_STATE_RUNNING;
2676 kkstp->kkst_state = KKST_STATE_STACKOK;
2677 stack_save_td(st, td);
2681 stack_sbuf_print(&sb, st);
2684 error = SYSCTL_OUT(req, kkstp, sizeof(*kkstp));
2691 if (lwpidarray != NULL)
2692 free(lwpidarray, M_TEMP);
2694 free(kkstp, M_TEMP);
2700 * This sysctl allows a process to retrieve the full list of groups from
2701 * itself or another process.
2704 sysctl_kern_proc_groups(SYSCTL_HANDLER_ARGS)
2706 pid_t *pidp = (pid_t *)arg1;
2707 unsigned int arglen = arg2;
2714 if (*pidp == -1) { /* -1 means this process */
2715 p = req->td->td_proc;
2718 error = pget(*pidp, PGET_CANSEE, &p);
2723 cred = crhold(p->p_ucred);
2726 error = SYSCTL_OUT(req, cred->cr_groups,
2727 cred->cr_ngroups * sizeof(gid_t));
2733 * This sysctl allows a process to retrieve or/and set the resource limit for
2737 sysctl_kern_proc_rlimit(SYSCTL_HANDLER_ARGS)
2739 int *name = (int *)arg1;
2740 u_int namelen = arg2;
2749 which = (u_int)name[1];
2750 if (which >= RLIM_NLIMITS)
2753 if (req->newptr != NULL && req->newlen != sizeof(rlim))
2756 flags = PGET_HOLD | PGET_NOTWEXIT;
2757 if (req->newptr != NULL)
2758 flags |= PGET_CANDEBUG;
2760 flags |= PGET_CANSEE;
2761 error = pget((pid_t)name[0], flags, &p);
2768 if (req->oldptr != NULL) {
2770 lim_rlimit_proc(p, which, &rlim);
2773 error = SYSCTL_OUT(req, &rlim, sizeof(rlim));
2780 if (req->newptr != NULL) {
2781 error = SYSCTL_IN(req, &rlim, sizeof(rlim));
2783 error = kern_proc_setrlimit(curthread, p, which, &rlim);
2792 * This sysctl allows a process to retrieve ps_strings structure location of
2796 sysctl_kern_proc_ps_strings(SYSCTL_HANDLER_ARGS)
2798 int *name = (int *)arg1;
2799 u_int namelen = arg2;
2801 vm_offset_t ps_strings;
2803 #ifdef COMPAT_FREEBSD32
2804 uint32_t ps_strings32;
2810 error = pget((pid_t)name[0], PGET_CANDEBUG, &p);
2813 #ifdef COMPAT_FREEBSD32
2814 if ((req->flags & SCTL_MASK32) != 0) {
2816 * We return 0 if the 32 bit emulation request is for a 64 bit
2819 ps_strings32 = SV_PROC_FLAG(p, SV_ILP32) != 0 ?
2820 PTROUT(p->p_sysent->sv_psstrings) : 0;
2822 error = SYSCTL_OUT(req, &ps_strings32, sizeof(ps_strings32));
2826 ps_strings = p->p_sysent->sv_psstrings;
2828 error = SYSCTL_OUT(req, &ps_strings, sizeof(ps_strings));
2833 * This sysctl allows a process to retrieve umask of another process.
2836 sysctl_kern_proc_umask(SYSCTL_HANDLER_ARGS)
2838 int *name = (int *)arg1;
2839 u_int namelen = arg2;
2848 pid = (pid_t)name[0];
2850 if (pid == p->p_pid || pid == 0) {
2851 fd_cmask = p->p_fd->fd_cmask;
2855 error = pget(pid, PGET_WANTREAD, &p);
2859 fd_cmask = p->p_fd->fd_cmask;
2862 error = SYSCTL_OUT(req, &fd_cmask, sizeof(fd_cmask));
2867 * This sysctl allows a process to set and retrieve binary osreldate of
2871 sysctl_kern_proc_osrel(SYSCTL_HANDLER_ARGS)
2873 int *name = (int *)arg1;
2874 u_int namelen = arg2;
2876 int flags, error, osrel;
2881 if (req->newptr != NULL && req->newlen != sizeof(osrel))
2884 flags = PGET_HOLD | PGET_NOTWEXIT;
2885 if (req->newptr != NULL)
2886 flags |= PGET_CANDEBUG;
2888 flags |= PGET_CANSEE;
2889 error = pget((pid_t)name[0], flags, &p);
2893 error = SYSCTL_OUT(req, &p->p_osrel, sizeof(p->p_osrel));
2897 if (req->newptr != NULL) {
2898 error = SYSCTL_IN(req, &osrel, sizeof(osrel));
2913 sysctl_kern_proc_sigtramp(SYSCTL_HANDLER_ARGS)
2915 int *name = (int *)arg1;
2916 u_int namelen = arg2;
2918 struct kinfo_sigtramp kst;
2919 const struct sysentvec *sv;
2921 #ifdef COMPAT_FREEBSD32
2922 struct kinfo_sigtramp32 kst32;
2928 error = pget((pid_t)name[0], PGET_CANDEBUG, &p);
2932 #ifdef COMPAT_FREEBSD32
2933 if ((req->flags & SCTL_MASK32) != 0) {
2934 bzero(&kst32, sizeof(kst32));
2935 if (SV_PROC_FLAG(p, SV_ILP32)) {
2936 if (sv->sv_sigcode_base != 0) {
2937 kst32.ksigtramp_start = sv->sv_sigcode_base;
2938 kst32.ksigtramp_end = sv->sv_sigcode_base +
2941 kst32.ksigtramp_start = sv->sv_psstrings -
2943 kst32.ksigtramp_end = sv->sv_psstrings;
2947 error = SYSCTL_OUT(req, &kst32, sizeof(kst32));
2951 bzero(&kst, sizeof(kst));
2952 if (sv->sv_sigcode_base != 0) {
2953 kst.ksigtramp_start = (char *)sv->sv_sigcode_base;
2954 kst.ksigtramp_end = (char *)sv->sv_sigcode_base +
2957 kst.ksigtramp_start = (char *)sv->sv_psstrings -
2959 kst.ksigtramp_end = (char *)sv->sv_psstrings;
2962 error = SYSCTL_OUT(req, &kst, sizeof(kst));
2966 SYSCTL_NODE(_kern, KERN_PROC, proc, CTLFLAG_RD, 0, "Process table");
2968 SYSCTL_PROC(_kern_proc, KERN_PROC_ALL, all, CTLFLAG_RD|CTLTYPE_STRUCT|
2969 CTLFLAG_MPSAFE, 0, 0, sysctl_kern_proc, "S,proc",
2970 "Return entire process table");
2972 static SYSCTL_NODE(_kern_proc, KERN_PROC_GID, gid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2973 sysctl_kern_proc, "Process table");
2975 static SYSCTL_NODE(_kern_proc, KERN_PROC_PGRP, pgrp, CTLFLAG_RD | CTLFLAG_MPSAFE,
2976 sysctl_kern_proc, "Process table");
2978 static SYSCTL_NODE(_kern_proc, KERN_PROC_RGID, rgid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2979 sysctl_kern_proc, "Process table");
2981 static SYSCTL_NODE(_kern_proc, KERN_PROC_SESSION, sid, CTLFLAG_RD |
2982 CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2984 static SYSCTL_NODE(_kern_proc, KERN_PROC_TTY, tty, CTLFLAG_RD | CTLFLAG_MPSAFE,
2985 sysctl_kern_proc, "Process table");
2987 static SYSCTL_NODE(_kern_proc, KERN_PROC_UID, uid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2988 sysctl_kern_proc, "Process table");
2990 static SYSCTL_NODE(_kern_proc, KERN_PROC_RUID, ruid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2991 sysctl_kern_proc, "Process table");
2993 static SYSCTL_NODE(_kern_proc, KERN_PROC_PID, pid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2994 sysctl_kern_proc, "Process table");
2996 static SYSCTL_NODE(_kern_proc, KERN_PROC_PROC, proc, CTLFLAG_RD | CTLFLAG_MPSAFE,
2997 sysctl_kern_proc, "Return process table, no threads");
2999 static SYSCTL_NODE(_kern_proc, KERN_PROC_ARGS, args,
3000 CTLFLAG_RW | CTLFLAG_CAPWR | CTLFLAG_ANYBODY | CTLFLAG_MPSAFE,
3001 sysctl_kern_proc_args, "Process argument list");
3003 static SYSCTL_NODE(_kern_proc, KERN_PROC_ENV, env, CTLFLAG_RD | CTLFLAG_MPSAFE,
3004 sysctl_kern_proc_env, "Process environment");
3006 static SYSCTL_NODE(_kern_proc, KERN_PROC_AUXV, auxv, CTLFLAG_RD |
3007 CTLFLAG_MPSAFE, sysctl_kern_proc_auxv, "Process ELF auxiliary vector");
3009 static SYSCTL_NODE(_kern_proc, KERN_PROC_PATHNAME, pathname, CTLFLAG_RD |
3010 CTLFLAG_MPSAFE, sysctl_kern_proc_pathname, "Process executable path");
3012 static SYSCTL_NODE(_kern_proc, KERN_PROC_SV_NAME, sv_name, CTLFLAG_RD |
3013 CTLFLAG_MPSAFE, sysctl_kern_proc_sv_name,
3014 "Process syscall vector name (ABI type)");
3016 static SYSCTL_NODE(_kern_proc, (KERN_PROC_GID | KERN_PROC_INC_THREAD), gid_td,
3017 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
3019 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PGRP | KERN_PROC_INC_THREAD), pgrp_td,
3020 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
3022 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RGID | KERN_PROC_INC_THREAD), rgid_td,
3023 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
3025 static SYSCTL_NODE(_kern_proc, (KERN_PROC_SESSION | KERN_PROC_INC_THREAD),
3026 sid_td, CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
3028 static SYSCTL_NODE(_kern_proc, (KERN_PROC_TTY | KERN_PROC_INC_THREAD), tty_td,
3029 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
3031 static SYSCTL_NODE(_kern_proc, (KERN_PROC_UID | KERN_PROC_INC_THREAD), uid_td,
3032 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
3034 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RUID | KERN_PROC_INC_THREAD), ruid_td,
3035 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
3037 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PID | KERN_PROC_INC_THREAD), pid_td,
3038 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
3040 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PROC | KERN_PROC_INC_THREAD), proc_td,
3041 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc,
3042 "Return process table, no threads");
3044 #ifdef COMPAT_FREEBSD7
3045 static SYSCTL_NODE(_kern_proc, KERN_PROC_OVMMAP, ovmmap, CTLFLAG_RD |
3046 CTLFLAG_MPSAFE, sysctl_kern_proc_ovmmap, "Old Process vm map entries");
3049 static SYSCTL_NODE(_kern_proc, KERN_PROC_VMMAP, vmmap, CTLFLAG_RD |
3050 CTLFLAG_MPSAFE, sysctl_kern_proc_vmmap, "Process vm map entries");
3052 #if defined(STACK) || defined(DDB)
3053 static SYSCTL_NODE(_kern_proc, KERN_PROC_KSTACK, kstack, CTLFLAG_RD |
3054 CTLFLAG_MPSAFE, sysctl_kern_proc_kstack, "Process kernel stacks");
3057 static SYSCTL_NODE(_kern_proc, KERN_PROC_GROUPS, groups, CTLFLAG_RD |
3058 CTLFLAG_MPSAFE, sysctl_kern_proc_groups, "Process groups");
3060 static SYSCTL_NODE(_kern_proc, KERN_PROC_RLIMIT, rlimit, CTLFLAG_RW |
3061 CTLFLAG_ANYBODY | CTLFLAG_MPSAFE, sysctl_kern_proc_rlimit,
3062 "Process resource limits");
3064 static SYSCTL_NODE(_kern_proc, KERN_PROC_PS_STRINGS, ps_strings, CTLFLAG_RD |
3065 CTLFLAG_MPSAFE, sysctl_kern_proc_ps_strings,
3066 "Process ps_strings location");
3068 static SYSCTL_NODE(_kern_proc, KERN_PROC_UMASK, umask, CTLFLAG_RD |
3069 CTLFLAG_MPSAFE, sysctl_kern_proc_umask, "Process umask");
3071 static SYSCTL_NODE(_kern_proc, KERN_PROC_OSREL, osrel, CTLFLAG_RW |
3072 CTLFLAG_ANYBODY | CTLFLAG_MPSAFE, sysctl_kern_proc_osrel,
3073 "Process binary osreldate");
3075 static SYSCTL_NODE(_kern_proc, KERN_PROC_SIGTRAMP, sigtramp, CTLFLAG_RD |
3076 CTLFLAG_MPSAFE, sysctl_kern_proc_sigtramp,
3077 "Process signal trampoline location");
3082 * stop_all_proc() purpose is to stop all process which have usermode,
3083 * except current process for obvious reasons. This makes it somewhat
3084 * unreliable when invoked from multithreaded process. The service
3085 * must not be user-callable anyway.
3090 struct proc *cp, *p;
3092 bool restart, seen_stopped, seen_exiting, stopped_some;
3096 sx_xlock(&allproc_lock);
3098 seen_exiting = seen_stopped = stopped_some = restart = false;
3099 LIST_REMOVE(cp, p_list);
3100 LIST_INSERT_HEAD(&allproc, cp, p_list);
3102 p = LIST_NEXT(cp, p_list);
3105 LIST_REMOVE(cp, p_list);
3106 LIST_INSERT_AFTER(p, cp, p_list);
3108 if ((p->p_flag & (P_KPROC | P_SYSTEM | P_TOTAL_STOP)) != 0) {
3112 if ((p->p_flag & P_WEXIT) != 0) {
3113 seen_exiting = true;
3117 if (P_SHOULDSTOP(p) == P_STOPPED_SINGLE) {
3119 * Stopped processes are tolerated when there
3120 * are no other processes which might continue
3121 * them. P_STOPPED_SINGLE but not
3122 * P_TOTAL_STOP process still has at least one
3125 seen_stopped = true;
3130 sx_xunlock(&allproc_lock);
3131 r = thread_single(p, SINGLE_ALLPROC);
3135 stopped_some = true;
3138 sx_xlock(&allproc_lock);
3140 /* Catch forked children we did not see in iteration. */
3141 if (gen != allproc_gen)
3143 sx_xunlock(&allproc_lock);
3144 if (restart || stopped_some || seen_exiting || seen_stopped) {
3145 kern_yield(PRI_USER);
3151 resume_all_proc(void)
3153 struct proc *cp, *p;
3156 sx_xlock(&allproc_lock);
3158 LIST_REMOVE(cp, p_list);
3159 LIST_INSERT_HEAD(&allproc, cp, p_list);
3161 p = LIST_NEXT(cp, p_list);
3164 LIST_REMOVE(cp, p_list);
3165 LIST_INSERT_AFTER(p, cp, p_list);
3167 if ((p->p_flag & P_TOTAL_STOP) != 0) {
3168 sx_xunlock(&allproc_lock);
3170 thread_single_end(p, SINGLE_ALLPROC);
3173 sx_xlock(&allproc_lock);
3178 /* Did the loop above missed any stopped process ? */
3179 FOREACH_PROC_IN_SYSTEM(p) {
3180 /* No need for proc lock. */
3181 if ((p->p_flag & P_TOTAL_STOP) != 0)
3184 sx_xunlock(&allproc_lock);
3187 /* #define TOTAL_STOP_DEBUG 1 */
3188 #ifdef TOTAL_STOP_DEBUG
3189 volatile static int ap_resume;
3190 #include <sys/mount.h>
3193 sysctl_debug_stop_all_proc(SYSCTL_HANDLER_ARGS)
3199 error = sysctl_handle_int(oidp, &val, 0, req);
3200 if (error != 0 || req->newptr == NULL)
3205 while (ap_resume == 0)
3213 SYSCTL_PROC(_debug, OID_AUTO, stop_all_proc, CTLTYPE_INT | CTLFLAG_RW |
3214 CTLFLAG_MPSAFE, __DEVOLATILE(int *, &ap_resume), 0,
3215 sysctl_debug_stop_all_proc, "I",