2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1982, 1986, 1989, 1991, 1993
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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 TAILQ_INIT(&p->p_threads); /* all threads in proc */
270 EVENTHANDLER_DIRECT_INVOKE(process_init, p);
271 p->p_stats = pstats_alloc();
273 SDT_PROBE3(proc, , init, return, p, size, flags);
278 * UMA should ensure that this function is never called.
279 * Freeing a proc structure would violate type stability.
282 proc_fini(void *mem, int size)
287 p = (struct proc *)mem;
288 EVENTHANDLER_DIRECT_INVOKE(process_fini, p);
289 pstats_free(p->p_stats);
290 thread_free(FIRST_THREAD_IN_PROC(p));
291 mtx_destroy(&p->p_mtx);
292 if (p->p_ksi != NULL)
293 ksiginfo_free(p->p_ksi);
295 panic("proc reclaimed");
300 * Is p an inferior of the current process?
303 inferior(struct proc *p)
306 sx_assert(&proctree_lock, SX_LOCKED);
307 PROC_LOCK_ASSERT(p, MA_OWNED);
308 for (; p != curproc; p = proc_realparent(p)) {
316 pfind_locked(pid_t pid)
320 sx_assert(&allproc_lock, SX_LOCKED);
321 LIST_FOREACH(p, PIDHASH(pid), p_hash) {
322 if (p->p_pid == pid) {
324 if (p->p_state == PRS_NEW) {
335 * Locate a process by number; return only "live" processes -- i.e., neither
336 * zombies nor newly born but incompletely initialized processes. By not
337 * returning processes in the PRS_NEW state, we allow callers to avoid
338 * testing for that condition to avoid dereferencing p_ucred, et al.
346 if (p->p_pid == pid) {
350 sx_slock(&allproc_lock);
351 p = pfind_locked(pid);
352 sx_sunlock(&allproc_lock);
357 * Same as pfind but allow zombies.
364 sx_slock(&allproc_lock);
365 p = pfind_locked(pid);
367 p = zpfind_locked(pid);
368 sx_sunlock(&allproc_lock);
374 * Locate a process group by number.
375 * The caller must hold proctree_lock.
382 sx_assert(&proctree_lock, SX_LOCKED);
384 LIST_FOREACH(pgrp, PGRPHASH(pgid), pg_hash) {
385 if (pgrp->pg_id == pgid) {
394 * Locate process and do additional manipulations, depending on flags.
397 pget(pid_t pid, int flags, struct proc **pp)
404 if (p->p_pid == pid) {
408 if (pid <= PID_MAX) {
409 sx_slock(&allproc_lock);
410 p = pfind_locked(pid);
411 if (p == NULL && (flags & PGET_NOTWEXIT) == 0)
412 p = zpfind_locked(pid);
413 sx_sunlock(&allproc_lock);
414 } else if ((flags & PGET_NOTID) == 0) {
415 td1 = tdfind(pid, -1);
421 if ((flags & PGET_CANSEE) != 0) {
422 error = p_cansee(curthread, p);
427 if ((flags & PGET_CANDEBUG) != 0) {
428 error = p_candebug(curthread, p);
432 if ((flags & PGET_ISCURRENT) != 0 && curproc != p) {
436 if ((flags & PGET_NOTWEXIT) != 0 && (p->p_flag & P_WEXIT) != 0) {
440 if ((flags & PGET_NOTINEXEC) != 0 && (p->p_flag & P_INEXEC) != 0) {
442 * XXXRW: Not clear ESRCH is the right error during proc
448 if ((flags & PGET_HOLD) != 0) {
460 * Create a new process group.
461 * pgid must be equal to the pid of p.
462 * Begin a new session if required.
465 enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp, struct session *sess)
468 sx_assert(&proctree_lock, SX_XLOCKED);
470 KASSERT(pgrp != NULL, ("enterpgrp: pgrp == NULL"));
471 KASSERT(p->p_pid == pgid,
472 ("enterpgrp: new pgrp and pid != pgid"));
473 KASSERT(pgfind(pgid) == NULL,
474 ("enterpgrp: pgrp with pgid exists"));
475 KASSERT(!SESS_LEADER(p),
476 ("enterpgrp: session leader attempted setpgrp"));
478 mtx_init(&pgrp->pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK);
484 mtx_init(&sess->s_mtx, "session", NULL, MTX_DEF);
486 p->p_flag &= ~P_CONTROLT;
490 sess->s_sid = p->p_pid;
491 refcount_init(&sess->s_count, 1);
492 sess->s_ttyvp = NULL;
493 sess->s_ttydp = NULL;
495 bcopy(p->p_session->s_login, sess->s_login,
496 sizeof(sess->s_login));
497 pgrp->pg_session = sess;
498 KASSERT(p == curproc,
499 ("enterpgrp: mksession and p != curproc"));
501 pgrp->pg_session = p->p_session;
502 sess_hold(pgrp->pg_session);
506 LIST_INIT(&pgrp->pg_members);
509 * As we have an exclusive lock of proctree_lock,
510 * this should not deadlock.
512 LIST_INSERT_HEAD(PGRPHASH(pgid), pgrp, pg_hash);
514 SLIST_INIT(&pgrp->pg_sigiolst);
517 doenterpgrp(p, pgrp);
523 * Move p to an existing process group
526 enterthispgrp(struct proc *p, struct pgrp *pgrp)
529 sx_assert(&proctree_lock, SX_XLOCKED);
530 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
531 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
532 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
533 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
534 KASSERT(pgrp->pg_session == p->p_session,
535 ("%s: pgrp's session %p, p->p_session %p.\n",
539 KASSERT(pgrp != p->p_pgrp,
540 ("%s: p belongs to pgrp.", __func__));
542 doenterpgrp(p, pgrp);
548 * Move p to a process group
551 doenterpgrp(struct proc *p, struct pgrp *pgrp)
553 struct pgrp *savepgrp;
555 sx_assert(&proctree_lock, SX_XLOCKED);
556 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
557 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
558 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
559 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
561 savepgrp = p->p_pgrp;
564 * Adjust eligibility of affected pgrps to participate in job control.
565 * Increment eligibility counts before decrementing, otherwise we
566 * could reach 0 spuriously during the first call.
569 fixjobc(p, p->p_pgrp, 0);
574 LIST_REMOVE(p, p_pglist);
577 LIST_INSERT_HEAD(&pgrp->pg_members, p, p_pglist);
578 PGRP_UNLOCK(savepgrp);
580 if (LIST_EMPTY(&savepgrp->pg_members))
585 * remove process from process group
588 leavepgrp(struct proc *p)
590 struct pgrp *savepgrp;
592 sx_assert(&proctree_lock, SX_XLOCKED);
593 savepgrp = p->p_pgrp;
596 LIST_REMOVE(p, p_pglist);
599 PGRP_UNLOCK(savepgrp);
600 if (LIST_EMPTY(&savepgrp->pg_members))
606 * delete a process group
609 pgdelete(struct pgrp *pgrp)
611 struct session *savesess;
614 sx_assert(&proctree_lock, SX_XLOCKED);
615 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
616 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
619 * Reset any sigio structures pointing to us as a result of
620 * F_SETOWN with our pgid.
622 funsetownlst(&pgrp->pg_sigiolst);
625 tp = pgrp->pg_session->s_ttyp;
626 LIST_REMOVE(pgrp, pg_hash);
627 savesess = pgrp->pg_session;
630 /* Remove the reference to the pgrp before deallocating it. */
633 tty_rel_pgrp(tp, pgrp);
636 mtx_destroy(&pgrp->pg_mtx);
638 sess_release(savesess);
642 pgadjustjobc(struct pgrp *pgrp, int entering)
650 if (pgrp->pg_jobc == 0)
657 * Adjust pgrp jobc counters when specified process changes process group.
658 * We count the number of processes in each process group that "qualify"
659 * the group for terminal job control (those with a parent in a different
660 * process group of the same session). If that count reaches zero, the
661 * process group becomes orphaned. Check both the specified process'
662 * process group and that of its children.
663 * entering == 0 => p is leaving specified group.
664 * entering == 1 => p is entering specified group.
667 fixjobc(struct proc *p, struct pgrp *pgrp, int entering)
669 struct pgrp *hispgrp;
670 struct session *mysession;
673 sx_assert(&proctree_lock, SX_LOCKED);
674 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
675 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
676 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
679 * Check p's parent to see whether p qualifies its own process
680 * group; if so, adjust count for p's process group.
682 mysession = pgrp->pg_session;
683 if ((hispgrp = p->p_pptr->p_pgrp) != pgrp &&
684 hispgrp->pg_session == mysession)
685 pgadjustjobc(pgrp, entering);
688 * Check this process' children to see whether they qualify
689 * their process groups; if so, adjust counts for children's
692 LIST_FOREACH(q, &p->p_children, p_sibling) {
694 if (hispgrp == pgrp ||
695 hispgrp->pg_session != mysession)
697 if (q->p_state == PRS_ZOMBIE)
699 pgadjustjobc(hispgrp, entering);
712 MPASS(p->p_flag & P_WEXIT);
714 * Do a quick check to see if there is anything to do with the
715 * proctree_lock held. pgrp and LIST_EMPTY checks are for fixjobc().
718 if (!SESS_LEADER(p) &&
719 (p->p_pgrp == p->p_pptr->p_pgrp) &&
720 LIST_EMPTY(&p->p_children)) {
726 sx_xlock(&proctree_lock);
727 if (SESS_LEADER(p)) {
731 * s_ttyp is not zero'd; we use this to indicate that
732 * the session once had a controlling terminal. (for
733 * logging and informational purposes)
744 * Signal foreground pgrp and revoke access to
745 * controlling terminal if it has not been revoked
748 * Because the TTY may have been revoked in the mean
749 * time and could already have a new session associated
750 * with it, make sure we don't send a SIGHUP to a
751 * foreground process group that does not belong to this
757 if (tp->t_session == sp)
758 tty_signal_pgrp(tp, SIGHUP);
763 sx_xunlock(&proctree_lock);
764 if (vn_lock(ttyvp, LK_EXCLUSIVE) == 0) {
765 VOP_REVOKE(ttyvp, REVOKEALL);
766 VOP_UNLOCK(ttyvp, 0);
769 sx_xlock(&proctree_lock);
772 fixjobc(p, p->p_pgrp, 0);
773 sx_xunlock(&proctree_lock);
777 * A process group has become orphaned;
778 * if there are any stopped processes in the group,
779 * hang-up all process in that group.
782 orphanpg(struct pgrp *pg)
786 PGRP_LOCK_ASSERT(pg, MA_OWNED);
788 LIST_FOREACH(p, &pg->pg_members, p_pglist) {
790 if (P_SHOULDSTOP(p) == P_STOPPED_SIG) {
792 LIST_FOREACH(p, &pg->pg_members, p_pglist) {
794 kern_psignal(p, SIGHUP);
795 kern_psignal(p, SIGCONT);
805 sess_hold(struct session *s)
808 refcount_acquire(&s->s_count);
812 sess_release(struct session *s)
815 if (refcount_release(&s->s_count)) {
816 if (s->s_ttyp != NULL) {
818 tty_rel_sess(s->s_ttyp, s);
820 mtx_destroy(&s->s_mtx);
827 DB_SHOW_COMMAND(pgrpdump, pgrpdump)
833 for (i = 0; i <= pgrphash; i++) {
834 if (!LIST_EMPTY(&pgrphashtbl[i])) {
835 printf("\tindx %d\n", i);
836 LIST_FOREACH(pgrp, &pgrphashtbl[i], pg_hash) {
838 "\tpgrp %p, pgid %ld, sess %p, sesscnt %d, mem %p\n",
839 (void *)pgrp, (long)pgrp->pg_id,
840 (void *)pgrp->pg_session,
841 pgrp->pg_session->s_count,
842 (void *)LIST_FIRST(&pgrp->pg_members));
843 LIST_FOREACH(p, &pgrp->pg_members, p_pglist) {
844 printf("\t\tpid %ld addr %p pgrp %p\n",
845 (long)p->p_pid, (void *)p,
855 * Calculate the kinfo_proc members which contain process-wide
857 * Must be called with the target process locked.
860 fill_kinfo_aggregate(struct proc *p, struct kinfo_proc *kp)
864 PROC_LOCK_ASSERT(p, MA_OWNED);
868 FOREACH_THREAD_IN_PROC(p, td) {
870 kp->ki_pctcpu += sched_pctcpu(td);
871 kp->ki_estcpu += sched_estcpu(td);
877 * Clear kinfo_proc and fill in any information that is common
878 * to all threads in the process.
879 * Must be called with the target process locked.
882 fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp)
889 struct timeval boottime;
891 PROC_LOCK_ASSERT(p, MA_OWNED);
892 bzero(kp, sizeof(*kp));
894 kp->ki_structsize = sizeof(*kp);
896 kp->ki_addr =/* p->p_addr; */0; /* XXX */
897 kp->ki_args = p->p_args;
898 kp->ki_textvp = p->p_textvp;
900 kp->ki_tracep = p->p_tracevp;
901 kp->ki_traceflag = p->p_traceflag;
904 kp->ki_vmspace = p->p_vmspace;
905 kp->ki_flag = p->p_flag;
906 kp->ki_flag2 = p->p_flag2;
909 kp->ki_uid = cred->cr_uid;
910 kp->ki_ruid = cred->cr_ruid;
911 kp->ki_svuid = cred->cr_svuid;
913 if (cred->cr_flags & CRED_FLAG_CAPMODE)
914 kp->ki_cr_flags |= KI_CRF_CAPABILITY_MODE;
915 /* XXX bde doesn't like KI_NGROUPS */
916 if (cred->cr_ngroups > KI_NGROUPS) {
917 kp->ki_ngroups = KI_NGROUPS;
918 kp->ki_cr_flags |= KI_CRF_GRP_OVERFLOW;
920 kp->ki_ngroups = cred->cr_ngroups;
921 bcopy(cred->cr_groups, kp->ki_groups,
922 kp->ki_ngroups * sizeof(gid_t));
923 kp->ki_rgid = cred->cr_rgid;
924 kp->ki_svgid = cred->cr_svgid;
925 /* If jailed(cred), emulate the old P_JAILED flag. */
927 kp->ki_flag |= P_JAILED;
928 /* If inside the jail, use 0 as a jail ID. */
929 if (cred->cr_prison != curthread->td_ucred->cr_prison)
930 kp->ki_jid = cred->cr_prison->pr_id;
932 strlcpy(kp->ki_loginclass, cred->cr_loginclass->lc_name,
933 sizeof(kp->ki_loginclass));
937 mtx_lock(&ps->ps_mtx);
938 kp->ki_sigignore = ps->ps_sigignore;
939 kp->ki_sigcatch = ps->ps_sigcatch;
940 mtx_unlock(&ps->ps_mtx);
942 if (p->p_state != PRS_NEW &&
943 p->p_state != PRS_ZOMBIE &&
944 p->p_vmspace != NULL) {
945 struct vmspace *vm = p->p_vmspace;
947 kp->ki_size = vm->vm_map.size;
948 kp->ki_rssize = vmspace_resident_count(vm); /*XXX*/
949 FOREACH_THREAD_IN_PROC(p, td0) {
950 if (!TD_IS_SWAPPED(td0))
951 kp->ki_rssize += td0->td_kstack_pages;
953 kp->ki_swrss = vm->vm_swrss;
954 kp->ki_tsize = vm->vm_tsize;
955 kp->ki_dsize = vm->vm_dsize;
956 kp->ki_ssize = vm->vm_ssize;
957 } else if (p->p_state == PRS_ZOMBIE)
959 if (kp->ki_flag & P_INMEM)
960 kp->ki_sflag = PS_INMEM;
963 /* Calculate legacy swtime as seconds since 'swtick'. */
964 kp->ki_swtime = (ticks - p->p_swtick) / hz;
965 kp->ki_pid = p->p_pid;
966 kp->ki_nice = p->p_nice;
967 kp->ki_fibnum = p->p_fibnum;
968 kp->ki_start = p->p_stats->p_start;
969 getboottime(&boottime);
970 timevaladd(&kp->ki_start, &boottime);
972 rufetch(p, &kp->ki_rusage);
973 kp->ki_runtime = cputick2usec(p->p_rux.rux_runtime);
974 calcru(p, &kp->ki_rusage.ru_utime, &kp->ki_rusage.ru_stime);
976 calccru(p, &kp->ki_childutime, &kp->ki_childstime);
977 /* Some callers want child times in a single value. */
978 kp->ki_childtime = kp->ki_childstime;
979 timevaladd(&kp->ki_childtime, &kp->ki_childutime);
981 FOREACH_THREAD_IN_PROC(p, td0)
982 kp->ki_cow += td0->td_cow;
986 kp->ki_pgid = p->p_pgrp->pg_id;
987 kp->ki_jobc = p->p_pgrp->pg_jobc;
988 sp = p->p_pgrp->pg_session;
991 kp->ki_sid = sp->s_sid;
993 strlcpy(kp->ki_login, sp->s_login,
994 sizeof(kp->ki_login));
996 kp->ki_kiflag |= KI_CTTY;
998 kp->ki_kiflag |= KI_SLEADER;
999 /* XXX proctree_lock */
1004 if ((p->p_flag & P_CONTROLT) && tp != NULL) {
1005 kp->ki_tdev = tty_udev(tp);
1006 kp->ki_tdev_freebsd11 = kp->ki_tdev; /* truncate */
1007 kp->ki_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
1009 kp->ki_tsid = tp->t_session->s_sid;
1011 kp->ki_tdev = NODEV;
1012 kp->ki_tdev_freebsd11 = kp->ki_tdev; /* truncate */
1014 if (p->p_comm[0] != '\0')
1015 strlcpy(kp->ki_comm, p->p_comm, sizeof(kp->ki_comm));
1016 if (p->p_sysent && p->p_sysent->sv_name != NULL &&
1017 p->p_sysent->sv_name[0] != '\0')
1018 strlcpy(kp->ki_emul, p->p_sysent->sv_name, sizeof(kp->ki_emul));
1019 kp->ki_siglist = p->p_siglist;
1020 kp->ki_xstat = KW_EXITCODE(p->p_xexit, p->p_xsig);
1021 kp->ki_acflag = p->p_acflag;
1022 kp->ki_lock = p->p_lock;
1024 kp->ki_ppid = p->p_oppid;
1025 if (p->p_flag & P_TRACED)
1026 kp->ki_tracer = p->p_pptr->p_pid;
1031 * Fill in information that is thread specific. Must be called with
1032 * target process locked. If 'preferthread' is set, overwrite certain
1033 * process-related fields that are maintained for both threads and
1037 fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp, int preferthread)
1043 PROC_LOCK_ASSERT(p, MA_OWNED);
1048 if (td->td_wmesg != NULL)
1049 strlcpy(kp->ki_wmesg, td->td_wmesg, sizeof(kp->ki_wmesg));
1051 bzero(kp->ki_wmesg, sizeof(kp->ki_wmesg));
1052 if (strlcpy(kp->ki_tdname, td->td_name, sizeof(kp->ki_tdname)) >=
1053 sizeof(kp->ki_tdname)) {
1054 strlcpy(kp->ki_moretdname,
1055 td->td_name + sizeof(kp->ki_tdname) - 1,
1056 sizeof(kp->ki_moretdname));
1058 bzero(kp->ki_moretdname, sizeof(kp->ki_moretdname));
1060 if (TD_ON_LOCK(td)) {
1061 kp->ki_kiflag |= KI_LOCKBLOCK;
1062 strlcpy(kp->ki_lockname, td->td_lockname,
1063 sizeof(kp->ki_lockname));
1065 kp->ki_kiflag &= ~KI_LOCKBLOCK;
1066 bzero(kp->ki_lockname, sizeof(kp->ki_lockname));
1069 if (p->p_state == PRS_NORMAL) { /* approximate. */
1070 if (TD_ON_RUNQ(td) ||
1072 TD_IS_RUNNING(td)) {
1074 } else if (P_SHOULDSTOP(p)) {
1075 kp->ki_stat = SSTOP;
1076 } else if (TD_IS_SLEEPING(td)) {
1077 kp->ki_stat = SSLEEP;
1078 } else if (TD_ON_LOCK(td)) {
1079 kp->ki_stat = SLOCK;
1081 kp->ki_stat = SWAIT;
1083 } else if (p->p_state == PRS_ZOMBIE) {
1084 kp->ki_stat = SZOMB;
1089 /* Things in the thread */
1090 kp->ki_wchan = td->td_wchan;
1091 kp->ki_pri.pri_level = td->td_priority;
1092 kp->ki_pri.pri_native = td->td_base_pri;
1095 * Note: legacy fields; clamp at the old NOCPU value and/or
1096 * the maximum u_char CPU value.
1098 if (td->td_lastcpu == NOCPU)
1099 kp->ki_lastcpu_old = NOCPU_OLD;
1100 else if (td->td_lastcpu > MAXCPU_OLD)
1101 kp->ki_lastcpu_old = MAXCPU_OLD;
1103 kp->ki_lastcpu_old = td->td_lastcpu;
1105 if (td->td_oncpu == NOCPU)
1106 kp->ki_oncpu_old = NOCPU_OLD;
1107 else if (td->td_oncpu > MAXCPU_OLD)
1108 kp->ki_oncpu_old = MAXCPU_OLD;
1110 kp->ki_oncpu_old = td->td_oncpu;
1112 kp->ki_lastcpu = td->td_lastcpu;
1113 kp->ki_oncpu = td->td_oncpu;
1114 kp->ki_tdflags = td->td_flags;
1115 kp->ki_tid = td->td_tid;
1116 kp->ki_numthreads = p->p_numthreads;
1117 kp->ki_pcb = td->td_pcb;
1118 kp->ki_kstack = (void *)td->td_kstack;
1119 kp->ki_slptime = (ticks - td->td_slptick) / hz;
1120 kp->ki_pri.pri_class = td->td_pri_class;
1121 kp->ki_pri.pri_user = td->td_user_pri;
1124 rufetchtd(td, &kp->ki_rusage);
1125 kp->ki_runtime = cputick2usec(td->td_rux.rux_runtime);
1126 kp->ki_pctcpu = sched_pctcpu(td);
1127 kp->ki_estcpu = sched_estcpu(td);
1128 kp->ki_cow = td->td_cow;
1131 /* We can't get this anymore but ps etc never used it anyway. */
1135 kp->ki_siglist = td->td_siglist;
1136 kp->ki_sigmask = td->td_sigmask;
1143 * Fill in a kinfo_proc structure for the specified process.
1144 * Must be called with the target process locked.
1147 fill_kinfo_proc(struct proc *p, struct kinfo_proc *kp)
1150 MPASS(FIRST_THREAD_IN_PROC(p) != NULL);
1152 fill_kinfo_proc_only(p, kp);
1153 fill_kinfo_thread(FIRST_THREAD_IN_PROC(p), kp, 0);
1154 fill_kinfo_aggregate(p, kp);
1161 return (malloc(sizeof(struct pstats), M_SUBPROC, M_ZERO|M_WAITOK));
1165 * Copy parts of p_stats; zero the rest of p_stats (statistics).
1168 pstats_fork(struct pstats *src, struct pstats *dst)
1171 bzero(&dst->pstat_startzero,
1172 __rangeof(struct pstats, pstat_startzero, pstat_endzero));
1173 bcopy(&src->pstat_startcopy, &dst->pstat_startcopy,
1174 __rangeof(struct pstats, pstat_startcopy, pstat_endcopy));
1178 pstats_free(struct pstats *ps)
1181 free(ps, M_SUBPROC);
1184 static struct proc *
1185 zpfind_locked(pid_t pid)
1189 sx_assert(&allproc_lock, SX_LOCKED);
1190 LIST_FOREACH(p, &zombproc, p_list) {
1191 if (p->p_pid == pid) {
1200 * Locate a zombie process by number
1207 sx_slock(&allproc_lock);
1208 p = zpfind_locked(pid);
1209 sx_sunlock(&allproc_lock);
1213 #ifdef COMPAT_FREEBSD32
1216 * This function is typically used to copy out the kernel address, so
1217 * it can be replaced by assignment of zero.
1219 static inline uint32_t
1220 ptr32_trim(void *ptr)
1224 uptr = (uintptr_t)ptr;
1225 return ((uptr > UINT_MAX) ? 0 : uptr);
1228 #define PTRTRIM_CP(src,dst,fld) \
1229 do { (dst).fld = ptr32_trim((src).fld); } while (0)
1232 freebsd32_kinfo_proc_out(const struct kinfo_proc *ki, struct kinfo_proc32 *ki32)
1236 bzero(ki32, sizeof(struct kinfo_proc32));
1237 ki32->ki_structsize = sizeof(struct kinfo_proc32);
1238 CP(*ki, *ki32, ki_layout);
1239 PTRTRIM_CP(*ki, *ki32, ki_args);
1240 PTRTRIM_CP(*ki, *ki32, ki_paddr);
1241 PTRTRIM_CP(*ki, *ki32, ki_addr);
1242 PTRTRIM_CP(*ki, *ki32, ki_tracep);
1243 PTRTRIM_CP(*ki, *ki32, ki_textvp);
1244 PTRTRIM_CP(*ki, *ki32, ki_fd);
1245 PTRTRIM_CP(*ki, *ki32, ki_vmspace);
1246 PTRTRIM_CP(*ki, *ki32, ki_wchan);
1247 CP(*ki, *ki32, ki_pid);
1248 CP(*ki, *ki32, ki_ppid);
1249 CP(*ki, *ki32, ki_pgid);
1250 CP(*ki, *ki32, ki_tpgid);
1251 CP(*ki, *ki32, ki_sid);
1252 CP(*ki, *ki32, ki_tsid);
1253 CP(*ki, *ki32, ki_jobc);
1254 CP(*ki, *ki32, ki_tdev);
1255 CP(*ki, *ki32, ki_tdev_freebsd11);
1256 CP(*ki, *ki32, ki_siglist);
1257 CP(*ki, *ki32, ki_sigmask);
1258 CP(*ki, *ki32, ki_sigignore);
1259 CP(*ki, *ki32, ki_sigcatch);
1260 CP(*ki, *ki32, ki_uid);
1261 CP(*ki, *ki32, ki_ruid);
1262 CP(*ki, *ki32, ki_svuid);
1263 CP(*ki, *ki32, ki_rgid);
1264 CP(*ki, *ki32, ki_svgid);
1265 CP(*ki, *ki32, ki_ngroups);
1266 for (i = 0; i < KI_NGROUPS; i++)
1267 CP(*ki, *ki32, ki_groups[i]);
1268 CP(*ki, *ki32, ki_size);
1269 CP(*ki, *ki32, ki_rssize);
1270 CP(*ki, *ki32, ki_swrss);
1271 CP(*ki, *ki32, ki_tsize);
1272 CP(*ki, *ki32, ki_dsize);
1273 CP(*ki, *ki32, ki_ssize);
1274 CP(*ki, *ki32, ki_xstat);
1275 CP(*ki, *ki32, ki_acflag);
1276 CP(*ki, *ki32, ki_pctcpu);
1277 CP(*ki, *ki32, ki_estcpu);
1278 CP(*ki, *ki32, ki_slptime);
1279 CP(*ki, *ki32, ki_swtime);
1280 CP(*ki, *ki32, ki_cow);
1281 CP(*ki, *ki32, ki_runtime);
1282 TV_CP(*ki, *ki32, ki_start);
1283 TV_CP(*ki, *ki32, ki_childtime);
1284 CP(*ki, *ki32, ki_flag);
1285 CP(*ki, *ki32, ki_kiflag);
1286 CP(*ki, *ki32, ki_traceflag);
1287 CP(*ki, *ki32, ki_stat);
1288 CP(*ki, *ki32, ki_nice);
1289 CP(*ki, *ki32, ki_lock);
1290 CP(*ki, *ki32, ki_rqindex);
1291 CP(*ki, *ki32, ki_oncpu);
1292 CP(*ki, *ki32, ki_lastcpu);
1294 /* XXX TODO: wrap cpu value as appropriate */
1295 CP(*ki, *ki32, ki_oncpu_old);
1296 CP(*ki, *ki32, ki_lastcpu_old);
1298 bcopy(ki->ki_tdname, ki32->ki_tdname, TDNAMLEN + 1);
1299 bcopy(ki->ki_wmesg, ki32->ki_wmesg, WMESGLEN + 1);
1300 bcopy(ki->ki_login, ki32->ki_login, LOGNAMELEN + 1);
1301 bcopy(ki->ki_lockname, ki32->ki_lockname, LOCKNAMELEN + 1);
1302 bcopy(ki->ki_comm, ki32->ki_comm, COMMLEN + 1);
1303 bcopy(ki->ki_emul, ki32->ki_emul, KI_EMULNAMELEN + 1);
1304 bcopy(ki->ki_loginclass, ki32->ki_loginclass, LOGINCLASSLEN + 1);
1305 bcopy(ki->ki_moretdname, ki32->ki_moretdname, MAXCOMLEN - TDNAMLEN + 1);
1306 CP(*ki, *ki32, ki_tracer);
1307 CP(*ki, *ki32, ki_flag2);
1308 CP(*ki, *ki32, ki_fibnum);
1309 CP(*ki, *ki32, ki_cr_flags);
1310 CP(*ki, *ki32, ki_jid);
1311 CP(*ki, *ki32, ki_numthreads);
1312 CP(*ki, *ki32, ki_tid);
1313 CP(*ki, *ki32, ki_pri);
1314 freebsd32_rusage_out(&ki->ki_rusage, &ki32->ki_rusage);
1315 freebsd32_rusage_out(&ki->ki_rusage_ch, &ki32->ki_rusage_ch);
1316 PTRTRIM_CP(*ki, *ki32, ki_pcb);
1317 PTRTRIM_CP(*ki, *ki32, ki_kstack);
1318 PTRTRIM_CP(*ki, *ki32, ki_udata);
1319 PTRTRIM_CP(*ki, *ki32, ki_tdaddr);
1320 CP(*ki, *ki32, ki_sflag);
1321 CP(*ki, *ki32, ki_tdflags);
1326 kern_proc_out_size(struct proc *p, int flags)
1330 PROC_LOCK_ASSERT(p, MA_OWNED);
1332 if ((flags & KERN_PROC_NOTHREADS) != 0) {
1333 #ifdef COMPAT_FREEBSD32
1334 if ((flags & KERN_PROC_MASK32) != 0) {
1335 size += sizeof(struct kinfo_proc32);
1338 size += sizeof(struct kinfo_proc);
1340 #ifdef COMPAT_FREEBSD32
1341 if ((flags & KERN_PROC_MASK32) != 0)
1342 size += sizeof(struct kinfo_proc32) * p->p_numthreads;
1345 size += sizeof(struct kinfo_proc) * p->p_numthreads;
1352 kern_proc_out(struct proc *p, struct sbuf *sb, int flags)
1355 struct kinfo_proc ki;
1356 #ifdef COMPAT_FREEBSD32
1357 struct kinfo_proc32 ki32;
1361 PROC_LOCK_ASSERT(p, MA_OWNED);
1362 MPASS(FIRST_THREAD_IN_PROC(p) != NULL);
1365 fill_kinfo_proc(p, &ki);
1366 if ((flags & KERN_PROC_NOTHREADS) != 0) {
1367 #ifdef COMPAT_FREEBSD32
1368 if ((flags & KERN_PROC_MASK32) != 0) {
1369 freebsd32_kinfo_proc_out(&ki, &ki32);
1370 if (sbuf_bcat(sb, &ki32, sizeof(ki32)) != 0)
1374 if (sbuf_bcat(sb, &ki, sizeof(ki)) != 0)
1377 FOREACH_THREAD_IN_PROC(p, td) {
1378 fill_kinfo_thread(td, &ki, 1);
1379 #ifdef COMPAT_FREEBSD32
1380 if ((flags & KERN_PROC_MASK32) != 0) {
1381 freebsd32_kinfo_proc_out(&ki, &ki32);
1382 if (sbuf_bcat(sb, &ki32, sizeof(ki32)) != 0)
1386 if (sbuf_bcat(sb, &ki, sizeof(ki)) != 0)
1397 sysctl_out_proc(struct proc *p, struct sysctl_req *req, int flags)
1400 struct kinfo_proc ki;
1403 if (req->oldptr == NULL)
1404 return (SYSCTL_OUT(req, 0, kern_proc_out_size(p, flags)));
1406 sbuf_new_for_sysctl(&sb, (char *)&ki, sizeof(ki), req);
1407 sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
1408 error = kern_proc_out(p, &sb, flags);
1409 error2 = sbuf_finish(&sb);
1413 else if (error2 != 0)
1419 sysctl_kern_proc(SYSCTL_HANDLER_ARGS)
1421 int *name = (int *)arg1;
1422 u_int namelen = arg2;
1424 int flags, doingzomb, oid_number;
1427 oid_number = oidp->oid_number;
1428 if (oid_number != KERN_PROC_ALL &&
1429 (oid_number & KERN_PROC_INC_THREAD) == 0)
1430 flags = KERN_PROC_NOTHREADS;
1433 oid_number &= ~KERN_PROC_INC_THREAD;
1435 #ifdef COMPAT_FREEBSD32
1436 if (req->flags & SCTL_MASK32)
1437 flags |= KERN_PROC_MASK32;
1439 if (oid_number == KERN_PROC_PID) {
1442 error = sysctl_wire_old_buffer(req, 0);
1445 error = pget((pid_t)name[0], PGET_CANSEE, &p);
1447 error = sysctl_out_proc(p, req, flags);
1451 switch (oid_number) {
1456 case KERN_PROC_PROC:
1457 if (namelen != 0 && namelen != 1)
1466 if (req->oldptr == NULL) {
1467 /* overestimate by 5 procs */
1468 error = SYSCTL_OUT(req, 0, sizeof (struct kinfo_proc) * 5);
1472 error = sysctl_wire_old_buffer(req, 0);
1476 sx_slock(&allproc_lock);
1477 for (doingzomb=0 ; doingzomb < 2 ; doingzomb++) {
1479 p = LIST_FIRST(&allproc);
1481 p = LIST_FIRST(&zombproc);
1482 for (; p != NULL; p = LIST_NEXT(p, p_list)) {
1484 * Skip embryonic processes.
1486 if (p->p_state == PRS_NEW)
1489 KASSERT(p->p_ucred != NULL,
1490 ("process credential is NULL for non-NEW proc"));
1492 * Show a user only appropriate processes.
1494 if (p_cansee(curthread, p)) {
1499 * TODO - make more efficient (see notes below).
1502 switch (oid_number) {
1505 if (p->p_ucred->cr_gid != (gid_t)name[0]) {
1511 case KERN_PROC_PGRP:
1512 /* could do this by traversing pgrp */
1513 if (p->p_pgrp == NULL ||
1514 p->p_pgrp->pg_id != (pid_t)name[0]) {
1520 case KERN_PROC_RGID:
1521 if (p->p_ucred->cr_rgid != (gid_t)name[0]) {
1527 case KERN_PROC_SESSION:
1528 if (p->p_session == NULL ||
1529 p->p_session->s_sid != (pid_t)name[0]) {
1536 if ((p->p_flag & P_CONTROLT) == 0 ||
1537 p->p_session == NULL) {
1541 /* XXX proctree_lock */
1542 SESS_LOCK(p->p_session);
1543 if (p->p_session->s_ttyp == NULL ||
1544 tty_udev(p->p_session->s_ttyp) !=
1546 SESS_UNLOCK(p->p_session);
1550 SESS_UNLOCK(p->p_session);
1554 if (p->p_ucred->cr_uid != (uid_t)name[0]) {
1560 case KERN_PROC_RUID:
1561 if (p->p_ucred->cr_ruid != (uid_t)name[0]) {
1567 case KERN_PROC_PROC:
1575 error = sysctl_out_proc(p, req, flags);
1581 sx_sunlock(&allproc_lock);
1586 pargs_alloc(int len)
1590 pa = malloc(sizeof(struct pargs) + len, M_PARGS,
1592 refcount_init(&pa->ar_ref, 1);
1593 pa->ar_length = len;
1598 pargs_free(struct pargs *pa)
1605 pargs_hold(struct pargs *pa)
1610 refcount_acquire(&pa->ar_ref);
1614 pargs_drop(struct pargs *pa)
1619 if (refcount_release(&pa->ar_ref))
1624 proc_read_string(struct thread *td, struct proc *p, const char *sptr, char *buf,
1630 * This may return a short read if the string is shorter than the chunk
1631 * and is aligned at the end of the page, and the following page is not
1634 n = proc_readmem(td, p, (vm_offset_t)sptr, buf, len);
1640 #define PROC_AUXV_MAX 256 /* Safety limit on auxv size. */
1642 enum proc_vector_type {
1648 #ifdef COMPAT_FREEBSD32
1650 get_proc_vector32(struct thread *td, struct proc *p, char ***proc_vectorp,
1651 size_t *vsizep, enum proc_vector_type type)
1653 struct freebsd32_ps_strings pss;
1655 vm_offset_t vptr, ptr;
1656 uint32_t *proc_vector32;
1662 if (proc_readmem(td, p, (vm_offset_t)p->p_sysent->sv_psstrings, &pss,
1663 sizeof(pss)) != sizeof(pss))
1667 vptr = (vm_offset_t)PTRIN(pss.ps_argvstr);
1668 vsize = pss.ps_nargvstr;
1669 if (vsize > ARG_MAX)
1671 size = vsize * sizeof(int32_t);
1674 vptr = (vm_offset_t)PTRIN(pss.ps_envstr);
1675 vsize = pss.ps_nenvstr;
1676 if (vsize > ARG_MAX)
1678 size = vsize * sizeof(int32_t);
1681 vptr = (vm_offset_t)PTRIN(pss.ps_envstr) +
1682 (pss.ps_nenvstr + 1) * sizeof(int32_t);
1685 for (ptr = vptr, i = 0; i < PROC_AUXV_MAX; i++) {
1686 if (proc_readmem(td, p, ptr, &aux, sizeof(aux)) !=
1689 if (aux.a_type == AT_NULL)
1693 if (aux.a_type != AT_NULL)
1696 size = vsize * sizeof(aux);
1699 KASSERT(0, ("Wrong proc vector type: %d", type));
1702 proc_vector32 = malloc(size, M_TEMP, M_WAITOK);
1703 if (proc_readmem(td, p, vptr, proc_vector32, size) != size) {
1707 if (type == PROC_AUX) {
1708 *proc_vectorp = (char **)proc_vector32;
1712 proc_vector = malloc(vsize * sizeof(char *), M_TEMP, M_WAITOK);
1713 for (i = 0; i < (int)vsize; i++)
1714 proc_vector[i] = PTRIN(proc_vector32[i]);
1715 *proc_vectorp = proc_vector;
1718 free(proc_vector32, M_TEMP);
1724 get_proc_vector(struct thread *td, struct proc *p, char ***proc_vectorp,
1725 size_t *vsizep, enum proc_vector_type type)
1727 struct ps_strings pss;
1729 vm_offset_t vptr, ptr;
1734 #ifdef COMPAT_FREEBSD32
1735 if (SV_PROC_FLAG(p, SV_ILP32) != 0)
1736 return (get_proc_vector32(td, p, proc_vectorp, vsizep, type));
1738 if (proc_readmem(td, p, (vm_offset_t)p->p_sysent->sv_psstrings, &pss,
1739 sizeof(pss)) != sizeof(pss))
1743 vptr = (vm_offset_t)pss.ps_argvstr;
1744 vsize = pss.ps_nargvstr;
1745 if (vsize > ARG_MAX)
1747 size = vsize * sizeof(char *);
1750 vptr = (vm_offset_t)pss.ps_envstr;
1751 vsize = pss.ps_nenvstr;
1752 if (vsize > ARG_MAX)
1754 size = vsize * sizeof(char *);
1758 * The aux array is just above env array on the stack. Check
1759 * that the address is naturally aligned.
1761 vptr = (vm_offset_t)pss.ps_envstr + (pss.ps_nenvstr + 1)
1763 #if __ELF_WORD_SIZE == 64
1764 if (vptr % sizeof(uint64_t) != 0)
1766 if (vptr % sizeof(uint32_t) != 0)
1770 * We count the array size reading the aux vectors from the
1771 * stack until AT_NULL vector is returned. So (to keep the code
1772 * simple) we read the process stack twice: the first time here
1773 * to find the size and the second time when copying the vectors
1774 * to the allocated proc_vector.
1776 for (ptr = vptr, i = 0; i < PROC_AUXV_MAX; i++) {
1777 if (proc_readmem(td, p, ptr, &aux, sizeof(aux)) !=
1780 if (aux.a_type == AT_NULL)
1785 * If the PROC_AUXV_MAX entries are iterated over, and we have
1786 * not reached AT_NULL, it is most likely we are reading wrong
1787 * data: either the process doesn't have auxv array or data has
1788 * been modified. Return the error in this case.
1790 if (aux.a_type != AT_NULL)
1793 size = vsize * sizeof(aux);
1796 KASSERT(0, ("Wrong proc vector type: %d", type));
1797 return (EINVAL); /* In case we are built without INVARIANTS. */
1799 proc_vector = malloc(size, M_TEMP, M_WAITOK);
1800 if (proc_readmem(td, p, vptr, proc_vector, size) != size) {
1801 free(proc_vector, M_TEMP);
1804 *proc_vectorp = proc_vector;
1810 #define GET_PS_STRINGS_CHUNK_SZ 256 /* Chunk size (bytes) for ps_strings operations. */
1813 get_ps_strings(struct thread *td, struct proc *p, struct sbuf *sb,
1814 enum proc_vector_type type)
1816 size_t done, len, nchr, vsize;
1818 char **proc_vector, *sptr;
1819 char pss_string[GET_PS_STRINGS_CHUNK_SZ];
1821 PROC_ASSERT_HELD(p);
1824 * We are not going to read more than 2 * (PATH_MAX + ARG_MAX) bytes.
1826 nchr = 2 * (PATH_MAX + ARG_MAX);
1828 error = get_proc_vector(td, p, &proc_vector, &vsize, type);
1831 for (done = 0, i = 0; i < (int)vsize && done < nchr; i++) {
1833 * The program may have scribbled into its argv array, e.g. to
1834 * remove some arguments. If that has happened, break out
1835 * before trying to read from NULL.
1837 if (proc_vector[i] == NULL)
1839 for (sptr = proc_vector[i]; ; sptr += GET_PS_STRINGS_CHUNK_SZ) {
1840 error = proc_read_string(td, p, sptr, pss_string,
1841 sizeof(pss_string));
1844 len = strnlen(pss_string, GET_PS_STRINGS_CHUNK_SZ);
1845 if (done + len >= nchr)
1846 len = nchr - done - 1;
1847 sbuf_bcat(sb, pss_string, len);
1848 if (len != GET_PS_STRINGS_CHUNK_SZ)
1850 done += GET_PS_STRINGS_CHUNK_SZ;
1852 sbuf_bcat(sb, "", 1);
1856 free(proc_vector, M_TEMP);
1861 proc_getargv(struct thread *td, struct proc *p, struct sbuf *sb)
1864 return (get_ps_strings(curthread, p, sb, PROC_ARG));
1868 proc_getenvv(struct thread *td, struct proc *p, struct sbuf *sb)
1871 return (get_ps_strings(curthread, p, sb, PROC_ENV));
1875 proc_getauxv(struct thread *td, struct proc *p, struct sbuf *sb)
1881 error = get_proc_vector(td, p, &auxv, &vsize, PROC_AUX);
1883 #ifdef COMPAT_FREEBSD32
1884 if (SV_PROC_FLAG(p, SV_ILP32) != 0)
1885 size = vsize * sizeof(Elf32_Auxinfo);
1888 size = vsize * sizeof(Elf_Auxinfo);
1889 if (sbuf_bcat(sb, auxv, size) != 0)
1897 * This sysctl allows a process to retrieve the argument list or process
1898 * title for another process without groping around in the address space
1899 * of the other process. It also allow a process to set its own "process
1900 * title to a string of its own choice.
1903 sysctl_kern_proc_args(SYSCTL_HANDLER_ARGS)
1905 int *name = (int *)arg1;
1906 u_int namelen = arg2;
1907 struct pargs *newpa, *pa;
1910 int flags, error = 0, error2;
1916 pid = (pid_t)name[0];
1918 * If the query is for this process and it is single-threaded, there
1919 * is nobody to modify pargs, thus we can just read.
1922 if (pid == p->p_pid && p->p_numthreads == 1 && req->newptr == NULL &&
1923 (pa = p->p_args) != NULL)
1924 return (SYSCTL_OUT(req, pa->ar_args, pa->ar_length));
1926 flags = PGET_CANSEE;
1927 if (req->newptr != NULL)
1928 flags |= PGET_ISCURRENT;
1929 error = pget(pid, flags, &p);
1937 error = SYSCTL_OUT(req, pa->ar_args, pa->ar_length);
1939 } else if ((p->p_flag & (P_WEXIT | P_SYSTEM)) == 0) {
1942 sbuf_new_for_sysctl(&sb, NULL, GET_PS_STRINGS_CHUNK_SZ, req);
1943 sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
1944 error = proc_getargv(curthread, p, &sb);
1945 error2 = sbuf_finish(&sb);
1948 if (error == 0 && error2 != 0)
1953 if (error != 0 || req->newptr == NULL)
1956 if (req->newlen > ps_arg_cache_limit - sizeof(struct pargs))
1959 if (req->newlen == 0) {
1961 * Clear the argument pointer, so that we'll fetch arguments
1962 * with proc_getargv() until further notice.
1966 newpa = pargs_alloc(req->newlen);
1967 error = SYSCTL_IN(req, newpa->ar_args, req->newlen);
1982 * This sysctl allows a process to retrieve environment of another process.
1985 sysctl_kern_proc_env(SYSCTL_HANDLER_ARGS)
1987 int *name = (int *)arg1;
1988 u_int namelen = arg2;
1996 error = pget((pid_t)name[0], PGET_WANTREAD, &p);
1999 if ((p->p_flag & P_SYSTEM) != 0) {
2004 sbuf_new_for_sysctl(&sb, NULL, GET_PS_STRINGS_CHUNK_SZ, req);
2005 sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
2006 error = proc_getenvv(curthread, p, &sb);
2007 error2 = sbuf_finish(&sb);
2010 return (error != 0 ? error : error2);
2014 * This sysctl allows a process to retrieve ELF auxiliary vector of
2018 sysctl_kern_proc_auxv(SYSCTL_HANDLER_ARGS)
2020 int *name = (int *)arg1;
2021 u_int namelen = arg2;
2029 error = pget((pid_t)name[0], PGET_WANTREAD, &p);
2032 if ((p->p_flag & P_SYSTEM) != 0) {
2036 sbuf_new_for_sysctl(&sb, NULL, GET_PS_STRINGS_CHUNK_SZ, req);
2037 sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
2038 error = proc_getauxv(curthread, p, &sb);
2039 error2 = sbuf_finish(&sb);
2042 return (error != 0 ? error : error2);
2046 * This sysctl allows a process to retrieve the path of the executable for
2047 * itself or another process.
2050 sysctl_kern_proc_pathname(SYSCTL_HANDLER_ARGS)
2052 pid_t *pidp = (pid_t *)arg1;
2053 unsigned int arglen = arg2;
2056 char *retbuf, *freebuf;
2061 if (*pidp == -1) { /* -1 means this process */
2062 p = req->td->td_proc;
2064 error = pget(*pidp, PGET_CANSEE, &p);
2078 error = vn_fullpath(req->td, vp, &retbuf, &freebuf);
2082 error = SYSCTL_OUT(req, retbuf, strlen(retbuf) + 1);
2083 free(freebuf, M_TEMP);
2088 sysctl_kern_proc_sv_name(SYSCTL_HANDLER_ARGS)
2101 error = pget((pid_t)name[0], PGET_CANSEE, &p);
2104 sv_name = p->p_sysent->sv_name;
2106 return (sysctl_handle_string(oidp, sv_name, 0, req));
2109 #ifdef KINFO_OVMENTRY_SIZE
2110 CTASSERT(sizeof(struct kinfo_ovmentry) == KINFO_OVMENTRY_SIZE);
2113 #ifdef COMPAT_FREEBSD7
2115 sysctl_kern_proc_ovmmap(SYSCTL_HANDLER_ARGS)
2117 vm_map_entry_t entry, tmp_entry;
2118 unsigned int last_timestamp;
2119 char *fullpath, *freepath;
2120 struct kinfo_ovmentry *kve;
2130 error = pget((pid_t)name[0], PGET_WANTREAD, &p);
2133 vm = vmspace_acquire_ref(p);
2138 kve = malloc(sizeof(*kve), M_TEMP, M_WAITOK);
2141 vm_map_lock_read(map);
2142 for (entry = map->header.next; entry != &map->header;
2143 entry = entry->next) {
2144 vm_object_t obj, tobj, lobj;
2147 if (entry->eflags & MAP_ENTRY_IS_SUB_MAP)
2150 bzero(kve, sizeof(*kve));
2151 kve->kve_structsize = sizeof(*kve);
2153 kve->kve_private_resident = 0;
2154 obj = entry->object.vm_object;
2156 VM_OBJECT_RLOCK(obj);
2157 if (obj->shadow_count == 1)
2158 kve->kve_private_resident =
2159 obj->resident_page_count;
2161 kve->kve_resident = 0;
2162 addr = entry->start;
2163 while (addr < entry->end) {
2164 if (pmap_extract(map->pmap, addr))
2165 kve->kve_resident++;
2169 for (lobj = tobj = obj; tobj; tobj = tobj->backing_object) {
2171 VM_OBJECT_RLOCK(tobj);
2172 kve->kve_offset += tobj->backing_object_offset;
2175 VM_OBJECT_RUNLOCK(lobj);
2179 kve->kve_start = (void*)entry->start;
2180 kve->kve_end = (void*)entry->end;
2181 kve->kve_offset += (off_t)entry->offset;
2183 if (entry->protection & VM_PROT_READ)
2184 kve->kve_protection |= KVME_PROT_READ;
2185 if (entry->protection & VM_PROT_WRITE)
2186 kve->kve_protection |= KVME_PROT_WRITE;
2187 if (entry->protection & VM_PROT_EXECUTE)
2188 kve->kve_protection |= KVME_PROT_EXEC;
2190 if (entry->eflags & MAP_ENTRY_COW)
2191 kve->kve_flags |= KVME_FLAG_COW;
2192 if (entry->eflags & MAP_ENTRY_NEEDS_COPY)
2193 kve->kve_flags |= KVME_FLAG_NEEDS_COPY;
2194 if (entry->eflags & MAP_ENTRY_NOCOREDUMP)
2195 kve->kve_flags |= KVME_FLAG_NOCOREDUMP;
2197 last_timestamp = map->timestamp;
2198 vm_map_unlock_read(map);
2200 kve->kve_fileid = 0;
2206 switch (lobj->type) {
2208 kve->kve_type = KVME_TYPE_DEFAULT;
2211 kve->kve_type = KVME_TYPE_VNODE;
2216 if ((lobj->flags & OBJ_TMPFS_NODE) != 0) {
2217 kve->kve_type = KVME_TYPE_VNODE;
2218 if ((lobj->flags & OBJ_TMPFS) != 0) {
2219 vp = lobj->un_pager.swp.swp_tmpfs;
2223 kve->kve_type = KVME_TYPE_SWAP;
2227 kve->kve_type = KVME_TYPE_DEVICE;
2230 kve->kve_type = KVME_TYPE_PHYS;
2233 kve->kve_type = KVME_TYPE_DEAD;
2236 kve->kve_type = KVME_TYPE_SG;
2239 kve->kve_type = KVME_TYPE_UNKNOWN;
2243 VM_OBJECT_RUNLOCK(lobj);
2245 kve->kve_ref_count = obj->ref_count;
2246 kve->kve_shadow_count = obj->shadow_count;
2247 VM_OBJECT_RUNLOCK(obj);
2249 vn_fullpath(curthread, vp, &fullpath,
2251 cred = curthread->td_ucred;
2252 vn_lock(vp, LK_SHARED | LK_RETRY);
2253 if (VOP_GETATTR(vp, &va, cred) == 0) {
2254 kve->kve_fileid = va.va_fileid;
2256 kve->kve_fsid = va.va_fsid;
2261 kve->kve_type = KVME_TYPE_NONE;
2262 kve->kve_ref_count = 0;
2263 kve->kve_shadow_count = 0;
2266 strlcpy(kve->kve_path, fullpath, sizeof(kve->kve_path));
2267 if (freepath != NULL)
2268 free(freepath, M_TEMP);
2270 error = SYSCTL_OUT(req, kve, sizeof(*kve));
2271 vm_map_lock_read(map);
2274 if (last_timestamp != map->timestamp) {
2275 vm_map_lookup_entry(map, addr - 1, &tmp_entry);
2279 vm_map_unlock_read(map);
2285 #endif /* COMPAT_FREEBSD7 */
2287 #ifdef KINFO_VMENTRY_SIZE
2288 CTASSERT(sizeof(struct kinfo_vmentry) == KINFO_VMENTRY_SIZE);
2292 kern_proc_vmmap_resident(vm_map_t map, vm_map_entry_t entry,
2293 int *resident_count, bool *super)
2295 vm_object_t obj, tobj;
2298 vm_paddr_t locked_pa;
2299 vm_pindex_t pi, pi_adv, pindex;
2302 *resident_count = 0;
2303 if (vmmap_skip_res_cnt)
2307 obj = entry->object.vm_object;
2308 addr = entry->start;
2310 pi = OFF_TO_IDX(entry->offset);
2311 for (; addr < entry->end; addr += IDX_TO_OFF(pi_adv), pi += pi_adv) {
2312 if (m_adv != NULL) {
2315 pi_adv = atop(entry->end - addr);
2317 for (tobj = obj;; tobj = tobj->backing_object) {
2318 m = vm_page_find_least(tobj, pindex);
2320 if (m->pindex == pindex)
2322 if (pi_adv > m->pindex - pindex) {
2323 pi_adv = m->pindex - pindex;
2327 if (tobj->backing_object == NULL)
2329 pindex += OFF_TO_IDX(tobj->
2330 backing_object_offset);
2334 if (m->psind != 0 && addr + pagesizes[1] <= entry->end &&
2335 (addr & (pagesizes[1] - 1)) == 0 &&
2336 (pmap_mincore(map->pmap, addr, &locked_pa) &
2337 MINCORE_SUPER) != 0) {
2339 pi_adv = atop(pagesizes[1]);
2342 * We do not test the found page on validity.
2343 * Either the page is busy and being paged in,
2344 * or it was invalidated. The first case
2345 * should be counted as resident, the second
2346 * is not so clear; we do account both.
2350 *resident_count += pi_adv;
2353 PA_UNLOCK_COND(locked_pa);
2357 * Must be called with the process locked and will return unlocked.
2360 kern_proc_vmmap_out(struct proc *p, struct sbuf *sb, ssize_t maxlen, int flags)
2362 vm_map_entry_t entry, tmp_entry;
2365 vm_object_t obj, tobj, lobj;
2366 char *fullpath, *freepath;
2367 struct kinfo_vmentry *kve;
2372 unsigned int last_timestamp;
2376 PROC_LOCK_ASSERT(p, MA_OWNED);
2380 vm = vmspace_acquire_ref(p);
2385 kve = malloc(sizeof(*kve), M_TEMP, M_WAITOK | M_ZERO);
2389 vm_map_lock_read(map);
2390 for (entry = map->header.next; entry != &map->header;
2391 entry = entry->next) {
2392 if (entry->eflags & MAP_ENTRY_IS_SUB_MAP)
2396 bzero(kve, sizeof(*kve));
2397 obj = entry->object.vm_object;
2399 for (tobj = obj; tobj != NULL;
2400 tobj = tobj->backing_object) {
2401 VM_OBJECT_RLOCK(tobj);
2402 kve->kve_offset += tobj->backing_object_offset;
2405 if (obj->backing_object == NULL)
2406 kve->kve_private_resident =
2407 obj->resident_page_count;
2408 kern_proc_vmmap_resident(map, entry,
2409 &kve->kve_resident, &super);
2411 kve->kve_flags |= KVME_FLAG_SUPER;
2412 for (tobj = obj; tobj != NULL;
2413 tobj = tobj->backing_object) {
2414 if (tobj != obj && tobj != lobj)
2415 VM_OBJECT_RUNLOCK(tobj);
2421 kve->kve_start = entry->start;
2422 kve->kve_end = entry->end;
2423 kve->kve_offset += entry->offset;
2425 if (entry->protection & VM_PROT_READ)
2426 kve->kve_protection |= KVME_PROT_READ;
2427 if (entry->protection & VM_PROT_WRITE)
2428 kve->kve_protection |= KVME_PROT_WRITE;
2429 if (entry->protection & VM_PROT_EXECUTE)
2430 kve->kve_protection |= KVME_PROT_EXEC;
2432 if (entry->eflags & MAP_ENTRY_COW)
2433 kve->kve_flags |= KVME_FLAG_COW;
2434 if (entry->eflags & MAP_ENTRY_NEEDS_COPY)
2435 kve->kve_flags |= KVME_FLAG_NEEDS_COPY;
2436 if (entry->eflags & MAP_ENTRY_NOCOREDUMP)
2437 kve->kve_flags |= KVME_FLAG_NOCOREDUMP;
2438 if (entry->eflags & MAP_ENTRY_GROWS_UP)
2439 kve->kve_flags |= KVME_FLAG_GROWS_UP;
2440 if (entry->eflags & MAP_ENTRY_GROWS_DOWN)
2441 kve->kve_flags |= KVME_FLAG_GROWS_DOWN;
2442 if (entry->eflags & MAP_ENTRY_USER_WIRED)
2443 kve->kve_flags |= KVME_FLAG_USER_WIRED;
2445 last_timestamp = map->timestamp;
2446 vm_map_unlock_read(map);
2452 switch (lobj->type) {
2454 kve->kve_type = KVME_TYPE_DEFAULT;
2457 kve->kve_type = KVME_TYPE_VNODE;
2462 if ((lobj->flags & OBJ_TMPFS_NODE) != 0) {
2463 kve->kve_type = KVME_TYPE_VNODE;
2464 if ((lobj->flags & OBJ_TMPFS) != 0) {
2465 vp = lobj->un_pager.swp.swp_tmpfs;
2469 kve->kve_type = KVME_TYPE_SWAP;
2473 kve->kve_type = KVME_TYPE_DEVICE;
2476 kve->kve_type = KVME_TYPE_PHYS;
2479 kve->kve_type = KVME_TYPE_DEAD;
2482 kve->kve_type = KVME_TYPE_SG;
2484 case OBJT_MGTDEVICE:
2485 kve->kve_type = KVME_TYPE_MGTDEVICE;
2488 kve->kve_type = KVME_TYPE_UNKNOWN;
2492 VM_OBJECT_RUNLOCK(lobj);
2494 kve->kve_ref_count = obj->ref_count;
2495 kve->kve_shadow_count = obj->shadow_count;
2496 VM_OBJECT_RUNLOCK(obj);
2498 vn_fullpath(curthread, vp, &fullpath,
2500 kve->kve_vn_type = vntype_to_kinfo(vp->v_type);
2501 cred = curthread->td_ucred;
2502 vn_lock(vp, LK_SHARED | LK_RETRY);
2503 if (VOP_GETATTR(vp, &va, cred) == 0) {
2504 kve->kve_vn_fileid = va.va_fileid;
2505 kve->kve_vn_fsid = va.va_fsid;
2506 kve->kve_vn_fsid_freebsd11 =
2507 kve->kve_vn_fsid; /* truncate */
2509 MAKEIMODE(va.va_type, va.va_mode);
2510 kve->kve_vn_size = va.va_size;
2511 kve->kve_vn_rdev = va.va_rdev;
2512 kve->kve_vn_rdev_freebsd11 =
2513 kve->kve_vn_rdev; /* truncate */
2514 kve->kve_status = KF_ATTR_VALID;
2519 kve->kve_type = KVME_TYPE_NONE;
2520 kve->kve_ref_count = 0;
2521 kve->kve_shadow_count = 0;
2524 strlcpy(kve->kve_path, fullpath, sizeof(kve->kve_path));
2525 if (freepath != NULL)
2526 free(freepath, M_TEMP);
2528 /* Pack record size down */
2529 if ((flags & KERN_VMMAP_PACK_KINFO) != 0)
2530 kve->kve_structsize =
2531 offsetof(struct kinfo_vmentry, kve_path) +
2532 strlen(kve->kve_path) + 1;
2534 kve->kve_structsize = sizeof(*kve);
2535 kve->kve_structsize = roundup(kve->kve_structsize,
2538 /* Halt filling and truncate rather than exceeding maxlen */
2539 if (maxlen != -1 && maxlen < kve->kve_structsize) {
2541 vm_map_lock_read(map);
2543 } else if (maxlen != -1)
2544 maxlen -= kve->kve_structsize;
2546 if (sbuf_bcat(sb, kve, kve->kve_structsize) != 0)
2548 vm_map_lock_read(map);
2551 if (last_timestamp != map->timestamp) {
2552 vm_map_lookup_entry(map, addr - 1, &tmp_entry);
2556 vm_map_unlock_read(map);
2564 sysctl_kern_proc_vmmap(SYSCTL_HANDLER_ARGS)
2568 int error, error2, *name;
2571 sbuf_new_for_sysctl(&sb, NULL, sizeof(struct kinfo_vmentry), req);
2572 sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
2573 error = pget((pid_t)name[0], PGET_CANDEBUG | PGET_NOTWEXIT, &p);
2578 error = kern_proc_vmmap_out(p, &sb, -1, KERN_VMMAP_PACK_KINFO);
2579 error2 = sbuf_finish(&sb);
2581 return (error != 0 ? error : error2);
2584 #if defined(STACK) || defined(DDB)
2586 sysctl_kern_proc_kstack(SYSCTL_HANDLER_ARGS)
2588 struct kinfo_kstack *kkstp;
2589 int error, i, *name, numthreads;
2590 lwpid_t *lwpidarray;
2597 error = pget((pid_t)name[0], PGET_NOTINEXEC | PGET_WANTREAD, &p);
2601 kkstp = malloc(sizeof(*kkstp), M_TEMP, M_WAITOK);
2602 st = stack_create(M_WAITOK);
2607 if (lwpidarray != NULL) {
2608 free(lwpidarray, M_TEMP);
2611 numthreads = p->p_numthreads;
2613 lwpidarray = malloc(sizeof(*lwpidarray) * numthreads, M_TEMP,
2616 } while (numthreads < p->p_numthreads);
2619 * XXXRW: During the below loop, execve(2) and countless other sorts
2620 * of changes could have taken place. Should we check to see if the
2621 * vmspace has been replaced, or the like, in order to prevent
2622 * giving a snapshot that spans, say, execve(2), with some threads
2623 * before and some after? Among other things, the credentials could
2624 * have changed, in which case the right to extract debug info might
2625 * no longer be assured.
2628 FOREACH_THREAD_IN_PROC(p, td) {
2629 KASSERT(i < numthreads,
2630 ("sysctl_kern_proc_kstack: numthreads"));
2631 lwpidarray[i] = td->td_tid;
2635 for (i = 0; i < numthreads; i++) {
2636 td = thread_find(p, lwpidarray[i]);
2640 bzero(kkstp, sizeof(*kkstp));
2641 (void)sbuf_new(&sb, kkstp->kkst_trace,
2642 sizeof(kkstp->kkst_trace), SBUF_FIXEDLEN);
2644 kkstp->kkst_tid = td->td_tid;
2645 if (TD_IS_SWAPPED(td)) {
2646 kkstp->kkst_state = KKST_STATE_SWAPPED;
2647 } else if (TD_IS_RUNNING(td)) {
2648 if (stack_save_td_running(st, td) == 0)
2649 kkstp->kkst_state = KKST_STATE_STACKOK;
2651 kkstp->kkst_state = KKST_STATE_RUNNING;
2653 kkstp->kkst_state = KKST_STATE_STACKOK;
2654 stack_save_td(st, td);
2658 stack_sbuf_print(&sb, st);
2661 error = SYSCTL_OUT(req, kkstp, sizeof(*kkstp));
2668 if (lwpidarray != NULL)
2669 free(lwpidarray, M_TEMP);
2671 free(kkstp, M_TEMP);
2677 * This sysctl allows a process to retrieve the full list of groups from
2678 * itself or another process.
2681 sysctl_kern_proc_groups(SYSCTL_HANDLER_ARGS)
2683 pid_t *pidp = (pid_t *)arg1;
2684 unsigned int arglen = arg2;
2691 if (*pidp == -1) { /* -1 means this process */
2692 p = req->td->td_proc;
2695 error = pget(*pidp, PGET_CANSEE, &p);
2700 cred = crhold(p->p_ucred);
2703 error = SYSCTL_OUT(req, cred->cr_groups,
2704 cred->cr_ngroups * sizeof(gid_t));
2710 * This sysctl allows a process to retrieve or/and set the resource limit for
2714 sysctl_kern_proc_rlimit(SYSCTL_HANDLER_ARGS)
2716 int *name = (int *)arg1;
2717 u_int namelen = arg2;
2726 which = (u_int)name[1];
2727 if (which >= RLIM_NLIMITS)
2730 if (req->newptr != NULL && req->newlen != sizeof(rlim))
2733 flags = PGET_HOLD | PGET_NOTWEXIT;
2734 if (req->newptr != NULL)
2735 flags |= PGET_CANDEBUG;
2737 flags |= PGET_CANSEE;
2738 error = pget((pid_t)name[0], flags, &p);
2745 if (req->oldptr != NULL) {
2747 lim_rlimit_proc(p, which, &rlim);
2750 error = SYSCTL_OUT(req, &rlim, sizeof(rlim));
2757 if (req->newptr != NULL) {
2758 error = SYSCTL_IN(req, &rlim, sizeof(rlim));
2760 error = kern_proc_setrlimit(curthread, p, which, &rlim);
2769 * This sysctl allows a process to retrieve ps_strings structure location of
2773 sysctl_kern_proc_ps_strings(SYSCTL_HANDLER_ARGS)
2775 int *name = (int *)arg1;
2776 u_int namelen = arg2;
2778 vm_offset_t ps_strings;
2780 #ifdef COMPAT_FREEBSD32
2781 uint32_t ps_strings32;
2787 error = pget((pid_t)name[0], PGET_CANDEBUG, &p);
2790 #ifdef COMPAT_FREEBSD32
2791 if ((req->flags & SCTL_MASK32) != 0) {
2793 * We return 0 if the 32 bit emulation request is for a 64 bit
2796 ps_strings32 = SV_PROC_FLAG(p, SV_ILP32) != 0 ?
2797 PTROUT(p->p_sysent->sv_psstrings) : 0;
2799 error = SYSCTL_OUT(req, &ps_strings32, sizeof(ps_strings32));
2803 ps_strings = p->p_sysent->sv_psstrings;
2805 error = SYSCTL_OUT(req, &ps_strings, sizeof(ps_strings));
2810 * This sysctl allows a process to retrieve umask of another process.
2813 sysctl_kern_proc_umask(SYSCTL_HANDLER_ARGS)
2815 int *name = (int *)arg1;
2816 u_int namelen = arg2;
2825 pid = (pid_t)name[0];
2827 if (pid == p->p_pid || pid == 0) {
2828 fd_cmask = p->p_fd->fd_cmask;
2832 error = pget(pid, PGET_WANTREAD, &p);
2836 fd_cmask = p->p_fd->fd_cmask;
2839 error = SYSCTL_OUT(req, &fd_cmask, sizeof(fd_cmask));
2844 * This sysctl allows a process to set and retrieve binary osreldate of
2848 sysctl_kern_proc_osrel(SYSCTL_HANDLER_ARGS)
2850 int *name = (int *)arg1;
2851 u_int namelen = arg2;
2853 int flags, error, osrel;
2858 if (req->newptr != NULL && req->newlen != sizeof(osrel))
2861 flags = PGET_HOLD | PGET_NOTWEXIT;
2862 if (req->newptr != NULL)
2863 flags |= PGET_CANDEBUG;
2865 flags |= PGET_CANSEE;
2866 error = pget((pid_t)name[0], flags, &p);
2870 error = SYSCTL_OUT(req, &p->p_osrel, sizeof(p->p_osrel));
2874 if (req->newptr != NULL) {
2875 error = SYSCTL_IN(req, &osrel, sizeof(osrel));
2890 sysctl_kern_proc_sigtramp(SYSCTL_HANDLER_ARGS)
2892 int *name = (int *)arg1;
2893 u_int namelen = arg2;
2895 struct kinfo_sigtramp kst;
2896 const struct sysentvec *sv;
2898 #ifdef COMPAT_FREEBSD32
2899 struct kinfo_sigtramp32 kst32;
2905 error = pget((pid_t)name[0], PGET_CANDEBUG, &p);
2909 #ifdef COMPAT_FREEBSD32
2910 if ((req->flags & SCTL_MASK32) != 0) {
2911 bzero(&kst32, sizeof(kst32));
2912 if (SV_PROC_FLAG(p, SV_ILP32)) {
2913 if (sv->sv_sigcode_base != 0) {
2914 kst32.ksigtramp_start = sv->sv_sigcode_base;
2915 kst32.ksigtramp_end = sv->sv_sigcode_base +
2918 kst32.ksigtramp_start = sv->sv_psstrings -
2920 kst32.ksigtramp_end = sv->sv_psstrings;
2924 error = SYSCTL_OUT(req, &kst32, sizeof(kst32));
2928 bzero(&kst, sizeof(kst));
2929 if (sv->sv_sigcode_base != 0) {
2930 kst.ksigtramp_start = (char *)sv->sv_sigcode_base;
2931 kst.ksigtramp_end = (char *)sv->sv_sigcode_base +
2934 kst.ksigtramp_start = (char *)sv->sv_psstrings -
2936 kst.ksigtramp_end = (char *)sv->sv_psstrings;
2939 error = SYSCTL_OUT(req, &kst, sizeof(kst));
2943 SYSCTL_NODE(_kern, KERN_PROC, proc, CTLFLAG_RD, 0, "Process table");
2945 SYSCTL_PROC(_kern_proc, KERN_PROC_ALL, all, CTLFLAG_RD|CTLTYPE_STRUCT|
2946 CTLFLAG_MPSAFE, 0, 0, sysctl_kern_proc, "S,proc",
2947 "Return entire process table");
2949 static SYSCTL_NODE(_kern_proc, KERN_PROC_GID, gid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2950 sysctl_kern_proc, "Process table");
2952 static SYSCTL_NODE(_kern_proc, KERN_PROC_PGRP, pgrp, CTLFLAG_RD | CTLFLAG_MPSAFE,
2953 sysctl_kern_proc, "Process table");
2955 static SYSCTL_NODE(_kern_proc, KERN_PROC_RGID, rgid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2956 sysctl_kern_proc, "Process table");
2958 static SYSCTL_NODE(_kern_proc, KERN_PROC_SESSION, sid, CTLFLAG_RD |
2959 CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2961 static SYSCTL_NODE(_kern_proc, KERN_PROC_TTY, tty, CTLFLAG_RD | CTLFLAG_MPSAFE,
2962 sysctl_kern_proc, "Process table");
2964 static SYSCTL_NODE(_kern_proc, KERN_PROC_UID, uid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2965 sysctl_kern_proc, "Process table");
2967 static SYSCTL_NODE(_kern_proc, KERN_PROC_RUID, ruid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2968 sysctl_kern_proc, "Process table");
2970 static SYSCTL_NODE(_kern_proc, KERN_PROC_PID, pid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2971 sysctl_kern_proc, "Process table");
2973 static SYSCTL_NODE(_kern_proc, KERN_PROC_PROC, proc, CTLFLAG_RD | CTLFLAG_MPSAFE,
2974 sysctl_kern_proc, "Return process table, no threads");
2976 static SYSCTL_NODE(_kern_proc, KERN_PROC_ARGS, args,
2977 CTLFLAG_RW | CTLFLAG_CAPWR | CTLFLAG_ANYBODY | CTLFLAG_MPSAFE,
2978 sysctl_kern_proc_args, "Process argument list");
2980 static SYSCTL_NODE(_kern_proc, KERN_PROC_ENV, env, CTLFLAG_RD | CTLFLAG_MPSAFE,
2981 sysctl_kern_proc_env, "Process environment");
2983 static SYSCTL_NODE(_kern_proc, KERN_PROC_AUXV, auxv, CTLFLAG_RD |
2984 CTLFLAG_MPSAFE, sysctl_kern_proc_auxv, "Process ELF auxiliary vector");
2986 static SYSCTL_NODE(_kern_proc, KERN_PROC_PATHNAME, pathname, CTLFLAG_RD |
2987 CTLFLAG_MPSAFE, sysctl_kern_proc_pathname, "Process executable path");
2989 static SYSCTL_NODE(_kern_proc, KERN_PROC_SV_NAME, sv_name, CTLFLAG_RD |
2990 CTLFLAG_MPSAFE, sysctl_kern_proc_sv_name,
2991 "Process syscall vector name (ABI type)");
2993 static SYSCTL_NODE(_kern_proc, (KERN_PROC_GID | KERN_PROC_INC_THREAD), gid_td,
2994 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2996 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PGRP | KERN_PROC_INC_THREAD), pgrp_td,
2997 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2999 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RGID | KERN_PROC_INC_THREAD), rgid_td,
3000 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
3002 static SYSCTL_NODE(_kern_proc, (KERN_PROC_SESSION | KERN_PROC_INC_THREAD),
3003 sid_td, CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
3005 static SYSCTL_NODE(_kern_proc, (KERN_PROC_TTY | KERN_PROC_INC_THREAD), tty_td,
3006 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
3008 static SYSCTL_NODE(_kern_proc, (KERN_PROC_UID | KERN_PROC_INC_THREAD), uid_td,
3009 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
3011 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RUID | KERN_PROC_INC_THREAD), ruid_td,
3012 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
3014 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PID | KERN_PROC_INC_THREAD), pid_td,
3015 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
3017 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PROC | KERN_PROC_INC_THREAD), proc_td,
3018 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc,
3019 "Return process table, no threads");
3021 #ifdef COMPAT_FREEBSD7
3022 static SYSCTL_NODE(_kern_proc, KERN_PROC_OVMMAP, ovmmap, CTLFLAG_RD |
3023 CTLFLAG_MPSAFE, sysctl_kern_proc_ovmmap, "Old Process vm map entries");
3026 static SYSCTL_NODE(_kern_proc, KERN_PROC_VMMAP, vmmap, CTLFLAG_RD |
3027 CTLFLAG_MPSAFE, sysctl_kern_proc_vmmap, "Process vm map entries");
3029 #if defined(STACK) || defined(DDB)
3030 static SYSCTL_NODE(_kern_proc, KERN_PROC_KSTACK, kstack, CTLFLAG_RD |
3031 CTLFLAG_MPSAFE, sysctl_kern_proc_kstack, "Process kernel stacks");
3034 static SYSCTL_NODE(_kern_proc, KERN_PROC_GROUPS, groups, CTLFLAG_RD |
3035 CTLFLAG_MPSAFE, sysctl_kern_proc_groups, "Process groups");
3037 static SYSCTL_NODE(_kern_proc, KERN_PROC_RLIMIT, rlimit, CTLFLAG_RW |
3038 CTLFLAG_ANYBODY | CTLFLAG_MPSAFE, sysctl_kern_proc_rlimit,
3039 "Process resource limits");
3041 static SYSCTL_NODE(_kern_proc, KERN_PROC_PS_STRINGS, ps_strings, CTLFLAG_RD |
3042 CTLFLAG_MPSAFE, sysctl_kern_proc_ps_strings,
3043 "Process ps_strings location");
3045 static SYSCTL_NODE(_kern_proc, KERN_PROC_UMASK, umask, CTLFLAG_RD |
3046 CTLFLAG_MPSAFE, sysctl_kern_proc_umask, "Process umask");
3048 static SYSCTL_NODE(_kern_proc, KERN_PROC_OSREL, osrel, CTLFLAG_RW |
3049 CTLFLAG_ANYBODY | CTLFLAG_MPSAFE, sysctl_kern_proc_osrel,
3050 "Process binary osreldate");
3052 static SYSCTL_NODE(_kern_proc, KERN_PROC_SIGTRAMP, sigtramp, CTLFLAG_RD |
3053 CTLFLAG_MPSAFE, sysctl_kern_proc_sigtramp,
3054 "Process signal trampoline location");
3059 * stop_all_proc() purpose is to stop all process which have usermode,
3060 * except current process for obvious reasons. This makes it somewhat
3061 * unreliable when invoked from multithreaded process. The service
3062 * must not be user-callable anyway.
3067 struct proc *cp, *p;
3069 bool restart, seen_stopped, seen_exiting, stopped_some;
3073 sx_xlock(&allproc_lock);
3075 seen_exiting = seen_stopped = stopped_some = restart = false;
3076 LIST_REMOVE(cp, p_list);
3077 LIST_INSERT_HEAD(&allproc, cp, p_list);
3079 p = LIST_NEXT(cp, p_list);
3082 LIST_REMOVE(cp, p_list);
3083 LIST_INSERT_AFTER(p, cp, p_list);
3085 if ((p->p_flag & (P_KPROC | P_SYSTEM | P_TOTAL_STOP)) != 0) {
3089 if ((p->p_flag & P_WEXIT) != 0) {
3090 seen_exiting = true;
3094 if (P_SHOULDSTOP(p) == P_STOPPED_SINGLE) {
3096 * Stopped processes are tolerated when there
3097 * are no other processes which might continue
3098 * them. P_STOPPED_SINGLE but not
3099 * P_TOTAL_STOP process still has at least one
3102 seen_stopped = true;
3106 sx_xunlock(&allproc_lock);
3108 r = thread_single(p, SINGLE_ALLPROC);
3112 stopped_some = true;
3115 sx_xlock(&allproc_lock);
3117 /* Catch forked children we did not see in iteration. */
3118 if (gen != allproc_gen)
3120 sx_xunlock(&allproc_lock);
3121 if (restart || stopped_some || seen_exiting || seen_stopped) {
3122 kern_yield(PRI_USER);
3128 resume_all_proc(void)
3130 struct proc *cp, *p;
3133 sx_xlock(&allproc_lock);
3135 LIST_REMOVE(cp, p_list);
3136 LIST_INSERT_HEAD(&allproc, cp, p_list);
3138 p = LIST_NEXT(cp, p_list);
3141 LIST_REMOVE(cp, p_list);
3142 LIST_INSERT_AFTER(p, cp, p_list);
3144 if ((p->p_flag & P_TOTAL_STOP) != 0) {
3145 sx_xunlock(&allproc_lock);
3147 thread_single_end(p, SINGLE_ALLPROC);
3150 sx_xlock(&allproc_lock);
3155 /* Did the loop above missed any stopped process ? */
3156 FOREACH_PROC_IN_SYSTEM(p) {
3157 /* No need for proc lock. */
3158 if ((p->p_flag & P_TOTAL_STOP) != 0)
3161 sx_xunlock(&allproc_lock);
3164 /* #define TOTAL_STOP_DEBUG 1 */
3165 #ifdef TOTAL_STOP_DEBUG
3166 volatile static int ap_resume;
3167 #include <sys/mount.h>
3170 sysctl_debug_stop_all_proc(SYSCTL_HANDLER_ARGS)
3176 error = sysctl_handle_int(oidp, &val, 0, req);
3177 if (error != 0 || req->newptr == NULL)
3182 while (ap_resume == 0)
3190 SYSCTL_PROC(_debug, OID_AUTO, stop_all_proc, CTLTYPE_INT | CTLFLAG_RW |
3191 CTLFLAG_MPSAFE, __DEVOLATILE(int *, &ap_resume), 0,
3192 sysctl_debug_stop_all_proc, "I",