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>
44 #include <sys/bitstring.h>
46 #include <sys/eventhandler.h>
49 #include <sys/kernel.h>
50 #include <sys/limits.h>
52 #include <sys/loginclass.h>
53 #include <sys/malloc.h>
55 #include <sys/mount.h>
56 #include <sys/mutex.h>
58 #include <sys/ptrace.h>
59 #include <sys/refcount.h>
60 #include <sys/resourcevar.h>
61 #include <sys/rwlock.h>
63 #include <sys/sysent.h>
64 #include <sys/sched.h>
66 #include <sys/stack.h>
68 #include <sys/sysctl.h>
69 #include <sys/filedesc.h>
71 #include <sys/signalvar.h>
75 #include <sys/vnode.h>
83 #include <vm/vm_param.h>
84 #include <vm/vm_extern.h>
86 #include <vm/vm_map.h>
87 #include <vm/vm_object.h>
88 #include <vm/vm_page.h>
91 #ifdef COMPAT_FREEBSD32
92 #include <compat/freebsd32/freebsd32.h>
93 #include <compat/freebsd32/freebsd32_util.h>
96 SDT_PROVIDER_DEFINE(proc);
98 MALLOC_DEFINE(M_PGRP, "pgrp", "process group header");
99 MALLOC_DEFINE(M_SESSION, "session", "session header");
100 static MALLOC_DEFINE(M_PROC, "proc", "Proc structures");
101 MALLOC_DEFINE(M_SUBPROC, "subproc", "Proc sub-structures");
103 static void doenterpgrp(struct proc *, struct pgrp *);
104 static void orphanpg(struct pgrp *pg);
105 static void fill_kinfo_aggregate(struct proc *p, struct kinfo_proc *kp);
106 static void fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp);
107 static void fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp,
109 static void pgadjustjobc(struct pgrp *pgrp, int entering);
110 static void pgdelete(struct pgrp *);
111 static int proc_ctor(void *mem, int size, void *arg, int flags);
112 static void proc_dtor(void *mem, int size, void *arg);
113 static int proc_init(void *mem, int size, int flags);
114 static void proc_fini(void *mem, int size);
115 static void pargs_free(struct pargs *pa);
118 * Other process lists
120 struct pidhashhead *pidhashtbl;
121 struct sx *pidhashtbl_lock;
124 struct pgrphashhead *pgrphashtbl;
126 struct proclist allproc;
127 struct proclist zombproc;
128 struct sx __exclusive_cache_line allproc_lock;
129 struct sx __exclusive_cache_line zombproc_lock;
130 struct sx __exclusive_cache_line proctree_lock;
131 struct mtx __exclusive_cache_line ppeers_lock;
132 struct mtx __exclusive_cache_line procid_lock;
133 uma_zone_t proc_zone;
136 * The offset of various fields in struct proc and struct thread.
137 * These are used by kernel debuggers to enumerate kernel threads and
140 const int proc_off_p_pid = offsetof(struct proc, p_pid);
141 const int proc_off_p_comm = offsetof(struct proc, p_comm);
142 const int proc_off_p_list = offsetof(struct proc, p_list);
143 const int proc_off_p_threads = offsetof(struct proc, p_threads);
144 const int thread_off_td_tid = offsetof(struct thread, td_tid);
145 const int thread_off_td_name = offsetof(struct thread, td_name);
146 const int thread_off_td_oncpu = offsetof(struct thread, td_oncpu);
147 const int thread_off_td_pcb = offsetof(struct thread, td_pcb);
148 const int thread_off_td_plist = offsetof(struct thread, td_plist);
150 EVENTHANDLER_LIST_DEFINE(process_ctor);
151 EVENTHANDLER_LIST_DEFINE(process_dtor);
152 EVENTHANDLER_LIST_DEFINE(process_init);
153 EVENTHANDLER_LIST_DEFINE(process_fini);
154 EVENTHANDLER_LIST_DEFINE(process_exit);
155 EVENTHANDLER_LIST_DEFINE(process_fork);
156 EVENTHANDLER_LIST_DEFINE(process_exec);
158 EVENTHANDLER_LIST_DECLARE(thread_ctor);
159 EVENTHANDLER_LIST_DECLARE(thread_dtor);
161 int kstack_pages = KSTACK_PAGES;
162 SYSCTL_INT(_kern, OID_AUTO, kstack_pages, CTLFLAG_RD, &kstack_pages, 0,
163 "Kernel stack size in pages");
164 static int vmmap_skip_res_cnt = 0;
165 SYSCTL_INT(_kern, OID_AUTO, proc_vmmap_skip_resident_count, CTLFLAG_RW,
166 &vmmap_skip_res_cnt, 0,
167 "Skip calculation of the pages resident count in kern.proc.vmmap");
169 CTASSERT(sizeof(struct kinfo_proc) == KINFO_PROC_SIZE);
170 #ifdef COMPAT_FREEBSD32
171 CTASSERT(sizeof(struct kinfo_proc32) == KINFO_PROC32_SIZE);
175 * Initialize global process hashing structures.
182 sx_init(&allproc_lock, "allproc");
183 sx_init(&zombproc_lock, "zombproc");
184 sx_init(&proctree_lock, "proctree");
185 mtx_init(&ppeers_lock, "p_peers", NULL, MTX_DEF);
186 mtx_init(&procid_lock, "procid", NULL, MTX_DEF);
188 LIST_INIT(&zombproc);
189 pidhashtbl = hashinit(maxproc / 4, M_PROC, &pidhash);
190 pidhashlock = (pidhash + 1) / 64;
193 pidhashtbl_lock = malloc(sizeof(*pidhashtbl_lock) * (pidhashlock + 1),
194 M_PROC, M_WAITOK | M_ZERO);
195 for (i = 0; i < pidhashlock + 1; i++)
196 sx_init(&pidhashtbl_lock[i], "pidhash");
197 pgrphashtbl = hashinit(maxproc / 4, M_PROC, &pgrphash);
198 proc_zone = uma_zcreate("PROC", sched_sizeof_proc(),
199 proc_ctor, proc_dtor, proc_init, proc_fini,
200 UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
205 * Prepare a proc for use.
208 proc_ctor(void *mem, int size, void *arg, int flags)
213 p = (struct proc *)mem;
214 EVENTHANDLER_DIRECT_INVOKE(process_ctor, p);
215 td = FIRST_THREAD_IN_PROC(p);
217 /* Make sure all thread constructors are executed */
218 EVENTHANDLER_DIRECT_INVOKE(thread_ctor, td);
224 * Reclaim a proc after use.
227 proc_dtor(void *mem, int size, void *arg)
232 /* INVARIANTS checks go here */
233 p = (struct proc *)mem;
234 td = FIRST_THREAD_IN_PROC(p);
237 KASSERT((p->p_numthreads == 1),
238 ("bad number of threads in exiting process"));
239 KASSERT(STAILQ_EMPTY(&p->p_ktr), ("proc_dtor: non-empty p_ktr"));
241 /* Free all OSD associated to this thread. */
243 td_softdep_cleanup(td);
244 MPASS(td->td_su == NULL);
246 /* Make sure all thread destructors are executed */
247 EVENTHANDLER_DIRECT_INVOKE(thread_dtor, td);
249 EVENTHANDLER_DIRECT_INVOKE(process_dtor, p);
250 if (p->p_ksi != NULL)
251 KASSERT(! KSI_ONQ(p->p_ksi), ("SIGCHLD queue"));
255 * Initialize type-stable parts of a proc (when newly created).
258 proc_init(void *mem, int size, int flags)
262 p = (struct proc *)mem;
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();
277 * UMA should ensure that this function is never called.
278 * Freeing a proc structure would violate type stability.
281 proc_fini(void *mem, int size)
286 p = (struct proc *)mem;
287 EVENTHANDLER_DIRECT_INVOKE(process_fini, p);
288 pstats_free(p->p_stats);
289 thread_free(FIRST_THREAD_IN_PROC(p));
290 mtx_destroy(&p->p_mtx);
291 if (p->p_ksi != NULL)
292 ksiginfo_free(p->p_ksi);
294 panic("proc reclaimed");
299 * PID space management.
301 * These bitmaps are used by fork_findpid.
303 bitstr_t bit_decl(proc_id_pidmap, PID_MAX);
304 bitstr_t bit_decl(proc_id_grpidmap, PID_MAX);
305 bitstr_t bit_decl(proc_id_sessidmap, PID_MAX);
306 bitstr_t bit_decl(proc_id_reapmap, PID_MAX);
308 static bitstr_t *proc_id_array[] = {
316 proc_id_set(int type, pid_t id)
319 KASSERT(type >= 0 && type < nitems(proc_id_array),
320 ("invalid type %d\n", type));
321 mtx_lock(&procid_lock);
322 KASSERT(bit_test(proc_id_array[type], id) == 0,
323 ("bit %d already set in %d\n", id, type));
324 bit_set(proc_id_array[type], id);
325 mtx_unlock(&procid_lock);
329 proc_id_set_cond(int type, pid_t id)
332 KASSERT(type >= 0 && type < nitems(proc_id_array),
333 ("invalid type %d\n", type));
334 if (bit_test(proc_id_array[type], id))
336 mtx_lock(&procid_lock);
337 bit_set(proc_id_array[type], id);
338 mtx_unlock(&procid_lock);
342 proc_id_clear(int type, pid_t id)
345 KASSERT(type >= 0 && type < nitems(proc_id_array),
346 ("invalid type %d\n", type));
347 mtx_lock(&procid_lock);
348 KASSERT(bit_test(proc_id_array[type], id) != 0,
349 ("bit %d not set in %d\n", id, type));
350 bit_clear(proc_id_array[type], id);
351 mtx_unlock(&procid_lock);
355 * Is p an inferior of the current process?
358 inferior(struct proc *p)
361 sx_assert(&proctree_lock, SX_LOCKED);
362 PROC_LOCK_ASSERT(p, MA_OWNED);
363 for (; p != curproc; p = proc_realparent(p)) {
371 * Locate a process by number.
373 * By not returning processes in the PRS_NEW state, we allow callers to avoid
374 * testing for that condition to avoid dereferencing p_ucred, et al.
376 static __always_inline struct proc *
377 _pfind(pid_t pid, bool zombie)
382 if (p->p_pid == pid) {
386 sx_slock(PIDHASHLOCK(pid));
387 LIST_FOREACH(p, PIDHASH(pid), p_hash) {
388 if (p->p_pid == pid) {
390 if (p->p_state == PRS_NEW ||
391 (!zombie && p->p_state == PRS_ZOMBIE)) {
398 sx_sunlock(PIDHASHLOCK(pid));
406 return (_pfind(pid, false));
410 * Same as pfind but allow zombies.
416 return (_pfind(pid, true));
425 sx_slock(&allproc_lock);
426 FOREACH_PROC_IN_SYSTEM(p) {
428 if (p->p_state == PRS_NEW) {
432 FOREACH_THREAD_IN_PROC(p, td) {
433 if (td->td_tid == tid)
439 sx_sunlock(&allproc_lock);
444 * Locate a process group by number.
445 * The caller must hold proctree_lock.
452 sx_assert(&proctree_lock, SX_LOCKED);
454 LIST_FOREACH(pgrp, PGRPHASH(pgid), pg_hash) {
455 if (pgrp->pg_id == pgid) {
464 * Locate process and do additional manipulations, depending on flags.
467 pget(pid_t pid, int flags, struct proc **pp)
473 if (p->p_pid == pid) {
477 if (pid <= PID_MAX) {
478 if ((flags & PGET_NOTWEXIT) == 0)
482 } else if ((flags & PGET_NOTID) == 0) {
487 if ((flags & PGET_CANSEE) != 0) {
488 error = p_cansee(curthread, p);
493 if ((flags & PGET_CANDEBUG) != 0) {
494 error = p_candebug(curthread, p);
498 if ((flags & PGET_ISCURRENT) != 0 && curproc != p) {
502 if ((flags & PGET_NOTWEXIT) != 0 && (p->p_flag & P_WEXIT) != 0) {
506 if ((flags & PGET_NOTINEXEC) != 0 && (p->p_flag & P_INEXEC) != 0) {
508 * XXXRW: Not clear ESRCH is the right error during proc
514 if ((flags & PGET_HOLD) != 0) {
526 * Create a new process group.
527 * pgid must be equal to the pid of p.
528 * Begin a new session if required.
531 enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp, struct session *sess)
534 sx_assert(&proctree_lock, SX_XLOCKED);
536 KASSERT(pgrp != NULL, ("enterpgrp: pgrp == NULL"));
537 KASSERT(p->p_pid == pgid,
538 ("enterpgrp: new pgrp and pid != pgid"));
539 KASSERT(pgfind(pgid) == NULL,
540 ("enterpgrp: pgrp with pgid exists"));
541 KASSERT(!SESS_LEADER(p),
542 ("enterpgrp: session leader attempted setpgrp"));
544 mtx_init(&pgrp->pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK);
550 mtx_init(&sess->s_mtx, "session", NULL, MTX_DEF);
552 p->p_flag &= ~P_CONTROLT;
556 sess->s_sid = p->p_pid;
557 proc_id_set(PROC_ID_SESSION, p->p_pid);
558 refcount_init(&sess->s_count, 1);
559 sess->s_ttyvp = NULL;
560 sess->s_ttydp = NULL;
562 bcopy(p->p_session->s_login, sess->s_login,
563 sizeof(sess->s_login));
564 pgrp->pg_session = sess;
565 KASSERT(p == curproc,
566 ("enterpgrp: mksession and p != curproc"));
568 pgrp->pg_session = p->p_session;
569 sess_hold(pgrp->pg_session);
573 proc_id_set(PROC_ID_GROUP, p->p_pid);
574 LIST_INIT(&pgrp->pg_members);
577 * As we have an exclusive lock of proctree_lock,
578 * this should not deadlock.
580 LIST_INSERT_HEAD(PGRPHASH(pgid), pgrp, pg_hash);
582 SLIST_INIT(&pgrp->pg_sigiolst);
585 doenterpgrp(p, pgrp);
591 * Move p to an existing process group
594 enterthispgrp(struct proc *p, struct pgrp *pgrp)
597 sx_assert(&proctree_lock, SX_XLOCKED);
598 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
599 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
600 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
601 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
602 KASSERT(pgrp->pg_session == p->p_session,
603 ("%s: pgrp's session %p, p->p_session %p.\n",
607 KASSERT(pgrp != p->p_pgrp,
608 ("%s: p belongs to pgrp.", __func__));
610 doenterpgrp(p, pgrp);
616 * Move p to a process group
619 doenterpgrp(struct proc *p, struct pgrp *pgrp)
621 struct pgrp *savepgrp;
623 sx_assert(&proctree_lock, SX_XLOCKED);
624 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
625 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
626 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
627 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
629 savepgrp = p->p_pgrp;
632 * Adjust eligibility of affected pgrps to participate in job control.
633 * Increment eligibility counts before decrementing, otherwise we
634 * could reach 0 spuriously during the first call.
637 fixjobc(p, p->p_pgrp, 0);
642 LIST_REMOVE(p, p_pglist);
645 LIST_INSERT_HEAD(&pgrp->pg_members, p, p_pglist);
646 PGRP_UNLOCK(savepgrp);
648 if (LIST_EMPTY(&savepgrp->pg_members))
653 * remove process from process group
656 leavepgrp(struct proc *p)
658 struct pgrp *savepgrp;
660 sx_assert(&proctree_lock, SX_XLOCKED);
661 savepgrp = p->p_pgrp;
664 LIST_REMOVE(p, p_pglist);
667 PGRP_UNLOCK(savepgrp);
668 if (LIST_EMPTY(&savepgrp->pg_members))
674 * delete a process group
677 pgdelete(struct pgrp *pgrp)
679 struct session *savesess;
682 sx_assert(&proctree_lock, SX_XLOCKED);
683 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
684 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
687 * Reset any sigio structures pointing to us as a result of
688 * F_SETOWN with our pgid.
690 funsetownlst(&pgrp->pg_sigiolst);
693 tp = pgrp->pg_session->s_ttyp;
694 LIST_REMOVE(pgrp, pg_hash);
695 savesess = pgrp->pg_session;
698 /* Remove the reference to the pgrp before deallocating it. */
701 tty_rel_pgrp(tp, pgrp);
704 proc_id_clear(PROC_ID_GROUP, pgrp->pg_id);
705 mtx_destroy(&pgrp->pg_mtx);
707 sess_release(savesess);
711 pgadjustjobc(struct pgrp *pgrp, int entering)
719 if (pgrp->pg_jobc == 0)
726 * Adjust pgrp jobc counters when specified process changes process group.
727 * We count the number of processes in each process group that "qualify"
728 * the group for terminal job control (those with a parent in a different
729 * process group of the same session). If that count reaches zero, the
730 * process group becomes orphaned. Check both the specified process'
731 * process group and that of its children.
732 * entering == 0 => p is leaving specified group.
733 * entering == 1 => p is entering specified group.
736 fixjobc(struct proc *p, struct pgrp *pgrp, int entering)
738 struct pgrp *hispgrp;
739 struct session *mysession;
742 sx_assert(&proctree_lock, SX_LOCKED);
743 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
744 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
745 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
748 * Check p's parent to see whether p qualifies its own process
749 * group; if so, adjust count for p's process group.
751 mysession = pgrp->pg_session;
752 if ((hispgrp = p->p_pptr->p_pgrp) != pgrp &&
753 hispgrp->pg_session == mysession)
754 pgadjustjobc(pgrp, entering);
757 * Check this process' children to see whether they qualify
758 * their process groups; if so, adjust counts for children's
761 LIST_FOREACH(q, &p->p_children, p_sibling) {
763 if (hispgrp == pgrp ||
764 hispgrp->pg_session != mysession)
766 if (q->p_state == PRS_ZOMBIE)
768 pgadjustjobc(hispgrp, entering);
781 MPASS(p->p_flag & P_WEXIT);
783 * Do a quick check to see if there is anything to do with the
784 * proctree_lock held. pgrp and LIST_EMPTY checks are for fixjobc().
787 if (!SESS_LEADER(p) &&
788 (p->p_pgrp == p->p_pptr->p_pgrp) &&
789 LIST_EMPTY(&p->p_children)) {
795 sx_xlock(&proctree_lock);
796 if (SESS_LEADER(p)) {
800 * s_ttyp is not zero'd; we use this to indicate that
801 * the session once had a controlling terminal. (for
802 * logging and informational purposes)
813 * Signal foreground pgrp and revoke access to
814 * controlling terminal if it has not been revoked
817 * Because the TTY may have been revoked in the mean
818 * time and could already have a new session associated
819 * with it, make sure we don't send a SIGHUP to a
820 * foreground process group that does not belong to this
826 if (tp->t_session == sp)
827 tty_signal_pgrp(tp, SIGHUP);
832 sx_xunlock(&proctree_lock);
833 if (vn_lock(ttyvp, LK_EXCLUSIVE) == 0) {
834 VOP_REVOKE(ttyvp, REVOKEALL);
835 VOP_UNLOCK(ttyvp, 0);
838 sx_xlock(&proctree_lock);
841 fixjobc(p, p->p_pgrp, 0);
842 sx_xunlock(&proctree_lock);
846 * A process group has become orphaned;
847 * if there are any stopped processes in the group,
848 * hang-up all process in that group.
851 orphanpg(struct pgrp *pg)
855 PGRP_LOCK_ASSERT(pg, MA_OWNED);
857 LIST_FOREACH(p, &pg->pg_members, p_pglist) {
859 if (P_SHOULDSTOP(p) == P_STOPPED_SIG) {
861 LIST_FOREACH(p, &pg->pg_members, p_pglist) {
863 kern_psignal(p, SIGHUP);
864 kern_psignal(p, SIGCONT);
874 sess_hold(struct session *s)
877 refcount_acquire(&s->s_count);
881 sess_release(struct session *s)
884 if (refcount_release(&s->s_count)) {
885 if (s->s_ttyp != NULL) {
887 tty_rel_sess(s->s_ttyp, s);
889 proc_id_clear(PROC_ID_SESSION, s->s_sid);
890 mtx_destroy(&s->s_mtx);
897 DB_SHOW_COMMAND(pgrpdump, pgrpdump)
903 for (i = 0; i <= pgrphash; i++) {
904 if (!LIST_EMPTY(&pgrphashtbl[i])) {
905 printf("\tindx %d\n", i);
906 LIST_FOREACH(pgrp, &pgrphashtbl[i], pg_hash) {
908 "\tpgrp %p, pgid %ld, sess %p, sesscnt %d, mem %p\n",
909 (void *)pgrp, (long)pgrp->pg_id,
910 (void *)pgrp->pg_session,
911 pgrp->pg_session->s_count,
912 (void *)LIST_FIRST(&pgrp->pg_members));
913 LIST_FOREACH(p, &pgrp->pg_members, p_pglist) {
914 printf("\t\tpid %ld addr %p pgrp %p\n",
915 (long)p->p_pid, (void *)p,
925 * Calculate the kinfo_proc members which contain process-wide
927 * Must be called with the target process locked.
930 fill_kinfo_aggregate(struct proc *p, struct kinfo_proc *kp)
934 PROC_LOCK_ASSERT(p, MA_OWNED);
938 FOREACH_THREAD_IN_PROC(p, td) {
940 kp->ki_pctcpu += sched_pctcpu(td);
941 kp->ki_estcpu += sched_estcpu(td);
947 * Clear kinfo_proc and fill in any information that is common
948 * to all threads in the process.
949 * Must be called with the target process locked.
952 fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp)
959 struct timeval boottime;
961 PROC_LOCK_ASSERT(p, MA_OWNED);
962 bzero(kp, sizeof(*kp));
964 kp->ki_structsize = sizeof(*kp);
966 kp->ki_addr =/* p->p_addr; */0; /* XXX */
967 kp->ki_args = p->p_args;
968 kp->ki_textvp = p->p_textvp;
970 kp->ki_tracep = p->p_tracevp;
971 kp->ki_traceflag = p->p_traceflag;
974 kp->ki_vmspace = p->p_vmspace;
975 kp->ki_flag = p->p_flag;
976 kp->ki_flag2 = p->p_flag2;
979 kp->ki_uid = cred->cr_uid;
980 kp->ki_ruid = cred->cr_ruid;
981 kp->ki_svuid = cred->cr_svuid;
983 if (cred->cr_flags & CRED_FLAG_CAPMODE)
984 kp->ki_cr_flags |= KI_CRF_CAPABILITY_MODE;
985 /* XXX bde doesn't like KI_NGROUPS */
986 if (cred->cr_ngroups > KI_NGROUPS) {
987 kp->ki_ngroups = KI_NGROUPS;
988 kp->ki_cr_flags |= KI_CRF_GRP_OVERFLOW;
990 kp->ki_ngroups = cred->cr_ngroups;
991 bcopy(cred->cr_groups, kp->ki_groups,
992 kp->ki_ngroups * sizeof(gid_t));
993 kp->ki_rgid = cred->cr_rgid;
994 kp->ki_svgid = cred->cr_svgid;
995 /* If jailed(cred), emulate the old P_JAILED flag. */
997 kp->ki_flag |= P_JAILED;
998 /* If inside the jail, use 0 as a jail ID. */
999 if (cred->cr_prison != curthread->td_ucred->cr_prison)
1000 kp->ki_jid = cred->cr_prison->pr_id;
1002 strlcpy(kp->ki_loginclass, cred->cr_loginclass->lc_name,
1003 sizeof(kp->ki_loginclass));
1007 mtx_lock(&ps->ps_mtx);
1008 kp->ki_sigignore = ps->ps_sigignore;
1009 kp->ki_sigcatch = ps->ps_sigcatch;
1010 mtx_unlock(&ps->ps_mtx);
1012 if (p->p_state != PRS_NEW &&
1013 p->p_state != PRS_ZOMBIE &&
1014 p->p_vmspace != NULL) {
1015 struct vmspace *vm = p->p_vmspace;
1017 kp->ki_size = vm->vm_map.size;
1018 kp->ki_rssize = vmspace_resident_count(vm); /*XXX*/
1019 FOREACH_THREAD_IN_PROC(p, td0) {
1020 if (!TD_IS_SWAPPED(td0))
1021 kp->ki_rssize += td0->td_kstack_pages;
1023 kp->ki_swrss = vm->vm_swrss;
1024 kp->ki_tsize = vm->vm_tsize;
1025 kp->ki_dsize = vm->vm_dsize;
1026 kp->ki_ssize = vm->vm_ssize;
1027 } else if (p->p_state == PRS_ZOMBIE)
1028 kp->ki_stat = SZOMB;
1029 if (kp->ki_flag & P_INMEM)
1030 kp->ki_sflag = PS_INMEM;
1033 /* Calculate legacy swtime as seconds since 'swtick'. */
1034 kp->ki_swtime = (ticks - p->p_swtick) / hz;
1035 kp->ki_pid = p->p_pid;
1036 kp->ki_nice = p->p_nice;
1037 kp->ki_fibnum = p->p_fibnum;
1038 kp->ki_start = p->p_stats->p_start;
1039 getboottime(&boottime);
1040 timevaladd(&kp->ki_start, &boottime);
1042 rufetch(p, &kp->ki_rusage);
1043 kp->ki_runtime = cputick2usec(p->p_rux.rux_runtime);
1044 calcru(p, &kp->ki_rusage.ru_utime, &kp->ki_rusage.ru_stime);
1046 calccru(p, &kp->ki_childutime, &kp->ki_childstime);
1047 /* Some callers want child times in a single value. */
1048 kp->ki_childtime = kp->ki_childstime;
1049 timevaladd(&kp->ki_childtime, &kp->ki_childutime);
1051 FOREACH_THREAD_IN_PROC(p, td0)
1052 kp->ki_cow += td0->td_cow;
1056 kp->ki_pgid = p->p_pgrp->pg_id;
1057 kp->ki_jobc = p->p_pgrp->pg_jobc;
1058 sp = p->p_pgrp->pg_session;
1061 kp->ki_sid = sp->s_sid;
1063 strlcpy(kp->ki_login, sp->s_login,
1064 sizeof(kp->ki_login));
1066 kp->ki_kiflag |= KI_CTTY;
1068 kp->ki_kiflag |= KI_SLEADER;
1069 /* XXX proctree_lock */
1074 if ((p->p_flag & P_CONTROLT) && tp != NULL) {
1075 kp->ki_tdev = tty_udev(tp);
1076 kp->ki_tdev_freebsd11 = kp->ki_tdev; /* truncate */
1077 kp->ki_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
1079 kp->ki_tsid = tp->t_session->s_sid;
1081 kp->ki_tdev = NODEV;
1082 kp->ki_tdev_freebsd11 = kp->ki_tdev; /* truncate */
1084 if (p->p_comm[0] != '\0')
1085 strlcpy(kp->ki_comm, p->p_comm, sizeof(kp->ki_comm));
1086 if (p->p_sysent && p->p_sysent->sv_name != NULL &&
1087 p->p_sysent->sv_name[0] != '\0')
1088 strlcpy(kp->ki_emul, p->p_sysent->sv_name, sizeof(kp->ki_emul));
1089 kp->ki_siglist = p->p_siglist;
1090 kp->ki_xstat = KW_EXITCODE(p->p_xexit, p->p_xsig);
1091 kp->ki_acflag = p->p_acflag;
1092 kp->ki_lock = p->p_lock;
1094 kp->ki_ppid = p->p_oppid;
1095 if (p->p_flag & P_TRACED)
1096 kp->ki_tracer = p->p_pptr->p_pid;
1101 * Fill in information that is thread specific. Must be called with
1102 * target process locked. If 'preferthread' is set, overwrite certain
1103 * process-related fields that are maintained for both threads and
1107 fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp, int preferthread)
1113 PROC_LOCK_ASSERT(p, MA_OWNED);
1118 if (td->td_wmesg != NULL)
1119 strlcpy(kp->ki_wmesg, td->td_wmesg, sizeof(kp->ki_wmesg));
1121 bzero(kp->ki_wmesg, sizeof(kp->ki_wmesg));
1122 if (strlcpy(kp->ki_tdname, td->td_name, sizeof(kp->ki_tdname)) >=
1123 sizeof(kp->ki_tdname)) {
1124 strlcpy(kp->ki_moretdname,
1125 td->td_name + sizeof(kp->ki_tdname) - 1,
1126 sizeof(kp->ki_moretdname));
1128 bzero(kp->ki_moretdname, sizeof(kp->ki_moretdname));
1130 if (TD_ON_LOCK(td)) {
1131 kp->ki_kiflag |= KI_LOCKBLOCK;
1132 strlcpy(kp->ki_lockname, td->td_lockname,
1133 sizeof(kp->ki_lockname));
1135 kp->ki_kiflag &= ~KI_LOCKBLOCK;
1136 bzero(kp->ki_lockname, sizeof(kp->ki_lockname));
1139 if (p->p_state == PRS_NORMAL) { /* approximate. */
1140 if (TD_ON_RUNQ(td) ||
1142 TD_IS_RUNNING(td)) {
1144 } else if (P_SHOULDSTOP(p)) {
1145 kp->ki_stat = SSTOP;
1146 } else if (TD_IS_SLEEPING(td)) {
1147 kp->ki_stat = SSLEEP;
1148 } else if (TD_ON_LOCK(td)) {
1149 kp->ki_stat = SLOCK;
1151 kp->ki_stat = SWAIT;
1153 } else if (p->p_state == PRS_ZOMBIE) {
1154 kp->ki_stat = SZOMB;
1159 /* Things in the thread */
1160 kp->ki_wchan = td->td_wchan;
1161 kp->ki_pri.pri_level = td->td_priority;
1162 kp->ki_pri.pri_native = td->td_base_pri;
1165 * Note: legacy fields; clamp at the old NOCPU value and/or
1166 * the maximum u_char CPU value.
1168 if (td->td_lastcpu == NOCPU)
1169 kp->ki_lastcpu_old = NOCPU_OLD;
1170 else if (td->td_lastcpu > MAXCPU_OLD)
1171 kp->ki_lastcpu_old = MAXCPU_OLD;
1173 kp->ki_lastcpu_old = td->td_lastcpu;
1175 if (td->td_oncpu == NOCPU)
1176 kp->ki_oncpu_old = NOCPU_OLD;
1177 else if (td->td_oncpu > MAXCPU_OLD)
1178 kp->ki_oncpu_old = MAXCPU_OLD;
1180 kp->ki_oncpu_old = td->td_oncpu;
1182 kp->ki_lastcpu = td->td_lastcpu;
1183 kp->ki_oncpu = td->td_oncpu;
1184 kp->ki_tdflags = td->td_flags;
1185 kp->ki_tid = td->td_tid;
1186 kp->ki_numthreads = p->p_numthreads;
1187 kp->ki_pcb = td->td_pcb;
1188 kp->ki_kstack = (void *)td->td_kstack;
1189 kp->ki_slptime = (ticks - td->td_slptick) / hz;
1190 kp->ki_pri.pri_class = td->td_pri_class;
1191 kp->ki_pri.pri_user = td->td_user_pri;
1194 rufetchtd(td, &kp->ki_rusage);
1195 kp->ki_runtime = cputick2usec(td->td_rux.rux_runtime);
1196 kp->ki_pctcpu = sched_pctcpu(td);
1197 kp->ki_estcpu = sched_estcpu(td);
1198 kp->ki_cow = td->td_cow;
1201 /* We can't get this anymore but ps etc never used it anyway. */
1205 kp->ki_siglist = td->td_siglist;
1206 kp->ki_sigmask = td->td_sigmask;
1213 * Fill in a kinfo_proc structure for the specified process.
1214 * Must be called with the target process locked.
1217 fill_kinfo_proc(struct proc *p, struct kinfo_proc *kp)
1220 MPASS(FIRST_THREAD_IN_PROC(p) != NULL);
1222 fill_kinfo_proc_only(p, kp);
1223 fill_kinfo_thread(FIRST_THREAD_IN_PROC(p), kp, 0);
1224 fill_kinfo_aggregate(p, kp);
1231 return (malloc(sizeof(struct pstats), M_SUBPROC, M_ZERO|M_WAITOK));
1235 * Copy parts of p_stats; zero the rest of p_stats (statistics).
1238 pstats_fork(struct pstats *src, struct pstats *dst)
1241 bzero(&dst->pstat_startzero,
1242 __rangeof(struct pstats, pstat_startzero, pstat_endzero));
1243 bcopy(&src->pstat_startcopy, &dst->pstat_startcopy,
1244 __rangeof(struct pstats, pstat_startcopy, pstat_endcopy));
1248 pstats_free(struct pstats *ps)
1251 free(ps, M_SUBPROC);
1255 * Locate a zombie process by number
1262 sx_slock(&zombproc_lock);
1263 LIST_FOREACH(p, &zombproc, p_list) {
1264 if (p->p_pid == pid) {
1269 sx_sunlock(&zombproc_lock);
1273 #ifdef COMPAT_FREEBSD32
1276 * This function is typically used to copy out the kernel address, so
1277 * it can be replaced by assignment of zero.
1279 static inline uint32_t
1280 ptr32_trim(void *ptr)
1284 uptr = (uintptr_t)ptr;
1285 return ((uptr > UINT_MAX) ? 0 : uptr);
1288 #define PTRTRIM_CP(src,dst,fld) \
1289 do { (dst).fld = ptr32_trim((src).fld); } while (0)
1292 freebsd32_kinfo_proc_out(const struct kinfo_proc *ki, struct kinfo_proc32 *ki32)
1296 bzero(ki32, sizeof(struct kinfo_proc32));
1297 ki32->ki_structsize = sizeof(struct kinfo_proc32);
1298 CP(*ki, *ki32, ki_layout);
1299 PTRTRIM_CP(*ki, *ki32, ki_args);
1300 PTRTRIM_CP(*ki, *ki32, ki_paddr);
1301 PTRTRIM_CP(*ki, *ki32, ki_addr);
1302 PTRTRIM_CP(*ki, *ki32, ki_tracep);
1303 PTRTRIM_CP(*ki, *ki32, ki_textvp);
1304 PTRTRIM_CP(*ki, *ki32, ki_fd);
1305 PTRTRIM_CP(*ki, *ki32, ki_vmspace);
1306 PTRTRIM_CP(*ki, *ki32, ki_wchan);
1307 CP(*ki, *ki32, ki_pid);
1308 CP(*ki, *ki32, ki_ppid);
1309 CP(*ki, *ki32, ki_pgid);
1310 CP(*ki, *ki32, ki_tpgid);
1311 CP(*ki, *ki32, ki_sid);
1312 CP(*ki, *ki32, ki_tsid);
1313 CP(*ki, *ki32, ki_jobc);
1314 CP(*ki, *ki32, ki_tdev);
1315 CP(*ki, *ki32, ki_tdev_freebsd11);
1316 CP(*ki, *ki32, ki_siglist);
1317 CP(*ki, *ki32, ki_sigmask);
1318 CP(*ki, *ki32, ki_sigignore);
1319 CP(*ki, *ki32, ki_sigcatch);
1320 CP(*ki, *ki32, ki_uid);
1321 CP(*ki, *ki32, ki_ruid);
1322 CP(*ki, *ki32, ki_svuid);
1323 CP(*ki, *ki32, ki_rgid);
1324 CP(*ki, *ki32, ki_svgid);
1325 CP(*ki, *ki32, ki_ngroups);
1326 for (i = 0; i < KI_NGROUPS; i++)
1327 CP(*ki, *ki32, ki_groups[i]);
1328 CP(*ki, *ki32, ki_size);
1329 CP(*ki, *ki32, ki_rssize);
1330 CP(*ki, *ki32, ki_swrss);
1331 CP(*ki, *ki32, ki_tsize);
1332 CP(*ki, *ki32, ki_dsize);
1333 CP(*ki, *ki32, ki_ssize);
1334 CP(*ki, *ki32, ki_xstat);
1335 CP(*ki, *ki32, ki_acflag);
1336 CP(*ki, *ki32, ki_pctcpu);
1337 CP(*ki, *ki32, ki_estcpu);
1338 CP(*ki, *ki32, ki_slptime);
1339 CP(*ki, *ki32, ki_swtime);
1340 CP(*ki, *ki32, ki_cow);
1341 CP(*ki, *ki32, ki_runtime);
1342 TV_CP(*ki, *ki32, ki_start);
1343 TV_CP(*ki, *ki32, ki_childtime);
1344 CP(*ki, *ki32, ki_flag);
1345 CP(*ki, *ki32, ki_kiflag);
1346 CP(*ki, *ki32, ki_traceflag);
1347 CP(*ki, *ki32, ki_stat);
1348 CP(*ki, *ki32, ki_nice);
1349 CP(*ki, *ki32, ki_lock);
1350 CP(*ki, *ki32, ki_rqindex);
1351 CP(*ki, *ki32, ki_oncpu);
1352 CP(*ki, *ki32, ki_lastcpu);
1354 /* XXX TODO: wrap cpu value as appropriate */
1355 CP(*ki, *ki32, ki_oncpu_old);
1356 CP(*ki, *ki32, ki_lastcpu_old);
1358 bcopy(ki->ki_tdname, ki32->ki_tdname, TDNAMLEN + 1);
1359 bcopy(ki->ki_wmesg, ki32->ki_wmesg, WMESGLEN + 1);
1360 bcopy(ki->ki_login, ki32->ki_login, LOGNAMELEN + 1);
1361 bcopy(ki->ki_lockname, ki32->ki_lockname, LOCKNAMELEN + 1);
1362 bcopy(ki->ki_comm, ki32->ki_comm, COMMLEN + 1);
1363 bcopy(ki->ki_emul, ki32->ki_emul, KI_EMULNAMELEN + 1);
1364 bcopy(ki->ki_loginclass, ki32->ki_loginclass, LOGINCLASSLEN + 1);
1365 bcopy(ki->ki_moretdname, ki32->ki_moretdname, MAXCOMLEN - TDNAMLEN + 1);
1366 CP(*ki, *ki32, ki_tracer);
1367 CP(*ki, *ki32, ki_flag2);
1368 CP(*ki, *ki32, ki_fibnum);
1369 CP(*ki, *ki32, ki_cr_flags);
1370 CP(*ki, *ki32, ki_jid);
1371 CP(*ki, *ki32, ki_numthreads);
1372 CP(*ki, *ki32, ki_tid);
1373 CP(*ki, *ki32, ki_pri);
1374 freebsd32_rusage_out(&ki->ki_rusage, &ki32->ki_rusage);
1375 freebsd32_rusage_out(&ki->ki_rusage_ch, &ki32->ki_rusage_ch);
1376 PTRTRIM_CP(*ki, *ki32, ki_pcb);
1377 PTRTRIM_CP(*ki, *ki32, ki_kstack);
1378 PTRTRIM_CP(*ki, *ki32, ki_udata);
1379 PTRTRIM_CP(*ki, *ki32, ki_tdaddr);
1380 CP(*ki, *ki32, ki_sflag);
1381 CP(*ki, *ki32, ki_tdflags);
1386 kern_proc_out_size(struct proc *p, int flags)
1390 PROC_LOCK_ASSERT(p, MA_OWNED);
1392 if ((flags & KERN_PROC_NOTHREADS) != 0) {
1393 #ifdef COMPAT_FREEBSD32
1394 if ((flags & KERN_PROC_MASK32) != 0) {
1395 size += sizeof(struct kinfo_proc32);
1398 size += sizeof(struct kinfo_proc);
1400 #ifdef COMPAT_FREEBSD32
1401 if ((flags & KERN_PROC_MASK32) != 0)
1402 size += sizeof(struct kinfo_proc32) * p->p_numthreads;
1405 size += sizeof(struct kinfo_proc) * p->p_numthreads;
1412 kern_proc_out(struct proc *p, struct sbuf *sb, int flags)
1415 struct kinfo_proc ki;
1416 #ifdef COMPAT_FREEBSD32
1417 struct kinfo_proc32 ki32;
1421 PROC_LOCK_ASSERT(p, MA_OWNED);
1422 MPASS(FIRST_THREAD_IN_PROC(p) != NULL);
1425 fill_kinfo_proc(p, &ki);
1426 if ((flags & KERN_PROC_NOTHREADS) != 0) {
1427 #ifdef COMPAT_FREEBSD32
1428 if ((flags & KERN_PROC_MASK32) != 0) {
1429 freebsd32_kinfo_proc_out(&ki, &ki32);
1430 if (sbuf_bcat(sb, &ki32, sizeof(ki32)) != 0)
1434 if (sbuf_bcat(sb, &ki, sizeof(ki)) != 0)
1437 FOREACH_THREAD_IN_PROC(p, td) {
1438 fill_kinfo_thread(td, &ki, 1);
1439 #ifdef COMPAT_FREEBSD32
1440 if ((flags & KERN_PROC_MASK32) != 0) {
1441 freebsd32_kinfo_proc_out(&ki, &ki32);
1442 if (sbuf_bcat(sb, &ki32, sizeof(ki32)) != 0)
1446 if (sbuf_bcat(sb, &ki, sizeof(ki)) != 0)
1457 sysctl_out_proc(struct proc *p, struct sysctl_req *req, int flags)
1460 struct kinfo_proc ki;
1463 if (req->oldptr == NULL)
1464 return (SYSCTL_OUT(req, 0, kern_proc_out_size(p, flags)));
1466 sbuf_new_for_sysctl(&sb, (char *)&ki, sizeof(ki), req);
1467 sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
1468 error = kern_proc_out(p, &sb, flags);
1469 error2 = sbuf_finish(&sb);
1473 else if (error2 != 0)
1479 proc_iterate(int (*cb)(struct proc *, void *), void *cbarg)
1484 for (i = 0; i < pidhashlock + 1; i++) {
1485 sx_slock(&pidhashtbl_lock[i]);
1486 for (j = i; j <= pidhash; j += pidhashlock + 1) {
1487 LIST_FOREACH(p, &pidhashtbl[j], p_hash) {
1488 if (p->p_state == PRS_NEW)
1490 error = cb(p, cbarg);
1491 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
1493 sx_sunlock(&pidhashtbl_lock[i]);
1498 sx_sunlock(&pidhashtbl_lock[i]);
1503 struct kern_proc_out_args {
1504 struct sysctl_req *req;
1511 sysctl_kern_proc_iterate(struct proc *p, void *origarg)
1513 struct kern_proc_out_args *arg = origarg;
1514 int *name = arg->name;
1515 int oid_number = arg->oid_number;
1516 int flags = arg->flags;
1517 struct sysctl_req *req = arg->req;
1522 KASSERT(p->p_ucred != NULL,
1523 ("process credential is NULL for non-NEW proc"));
1525 * Show a user only appropriate processes.
1527 if (p_cansee(curthread, p))
1530 * TODO - make more efficient (see notes below).
1533 switch (oid_number) {
1536 if (p->p_ucred->cr_gid != (gid_t)name[0])
1540 case KERN_PROC_PGRP:
1541 /* could do this by traversing pgrp */
1542 if (p->p_pgrp == NULL ||
1543 p->p_pgrp->pg_id != (pid_t)name[0])
1547 case KERN_PROC_RGID:
1548 if (p->p_ucred->cr_rgid != (gid_t)name[0])
1552 case KERN_PROC_SESSION:
1553 if (p->p_session == NULL ||
1554 p->p_session->s_sid != (pid_t)name[0])
1559 if ((p->p_flag & P_CONTROLT) == 0 ||
1560 p->p_session == NULL)
1562 /* XXX proctree_lock */
1563 SESS_LOCK(p->p_session);
1564 if (p->p_session->s_ttyp == NULL ||
1565 tty_udev(p->p_session->s_ttyp) !=
1567 SESS_UNLOCK(p->p_session);
1570 SESS_UNLOCK(p->p_session);
1574 if (p->p_ucred->cr_uid != (uid_t)name[0])
1578 case KERN_PROC_RUID:
1579 if (p->p_ucred->cr_ruid != (uid_t)name[0])
1583 case KERN_PROC_PROC:
1590 error = sysctl_out_proc(p, req, flags);
1591 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
1599 sysctl_kern_proc(SYSCTL_HANDLER_ARGS)
1601 struct kern_proc_out_args iterarg;
1602 int *name = (int *)arg1;
1603 u_int namelen = arg2;
1605 int flags, oid_number;
1608 oid_number = oidp->oid_number;
1609 if (oid_number != KERN_PROC_ALL &&
1610 (oid_number & KERN_PROC_INC_THREAD) == 0)
1611 flags = KERN_PROC_NOTHREADS;
1614 oid_number &= ~KERN_PROC_INC_THREAD;
1616 #ifdef COMPAT_FREEBSD32
1617 if (req->flags & SCTL_MASK32)
1618 flags |= KERN_PROC_MASK32;
1620 if (oid_number == KERN_PROC_PID) {
1623 error = sysctl_wire_old_buffer(req, 0);
1626 error = pget((pid_t)name[0], PGET_CANSEE, &p);
1628 error = sysctl_out_proc(p, req, flags);
1632 switch (oid_number) {
1637 case KERN_PROC_PROC:
1638 if (namelen != 0 && namelen != 1)
1647 if (req->oldptr == NULL) {
1648 /* overestimate by 5 procs */
1649 error = SYSCTL_OUT(req, 0, sizeof (struct kinfo_proc) * 5);
1653 error = sysctl_wire_old_buffer(req, 0);
1657 iterarg.flags = flags;
1658 iterarg.oid_number = oid_number;
1660 iterarg.name = name;
1661 error = proc_iterate(sysctl_kern_proc_iterate, &iterarg);
1666 pargs_alloc(int len)
1670 pa = malloc(sizeof(struct pargs) + len, M_PARGS,
1672 refcount_init(&pa->ar_ref, 1);
1673 pa->ar_length = len;
1678 pargs_free(struct pargs *pa)
1685 pargs_hold(struct pargs *pa)
1690 refcount_acquire(&pa->ar_ref);
1694 pargs_drop(struct pargs *pa)
1699 if (refcount_release(&pa->ar_ref))
1704 proc_read_string(struct thread *td, struct proc *p, const char *sptr, char *buf,
1710 * This may return a short read if the string is shorter than the chunk
1711 * and is aligned at the end of the page, and the following page is not
1714 n = proc_readmem(td, p, (vm_offset_t)sptr, buf, len);
1720 #define PROC_AUXV_MAX 256 /* Safety limit on auxv size. */
1722 enum proc_vector_type {
1728 #ifdef COMPAT_FREEBSD32
1730 get_proc_vector32(struct thread *td, struct proc *p, char ***proc_vectorp,
1731 size_t *vsizep, enum proc_vector_type type)
1733 struct freebsd32_ps_strings pss;
1735 vm_offset_t vptr, ptr;
1736 uint32_t *proc_vector32;
1742 if (proc_readmem(td, p, (vm_offset_t)p->p_sysent->sv_psstrings, &pss,
1743 sizeof(pss)) != sizeof(pss))
1747 vptr = (vm_offset_t)PTRIN(pss.ps_argvstr);
1748 vsize = pss.ps_nargvstr;
1749 if (vsize > ARG_MAX)
1751 size = vsize * sizeof(int32_t);
1754 vptr = (vm_offset_t)PTRIN(pss.ps_envstr);
1755 vsize = pss.ps_nenvstr;
1756 if (vsize > ARG_MAX)
1758 size = vsize * sizeof(int32_t);
1761 vptr = (vm_offset_t)PTRIN(pss.ps_envstr) +
1762 (pss.ps_nenvstr + 1) * sizeof(int32_t);
1765 for (ptr = vptr, i = 0; i < PROC_AUXV_MAX; i++) {
1766 if (proc_readmem(td, p, ptr, &aux, sizeof(aux)) !=
1769 if (aux.a_type == AT_NULL)
1773 if (aux.a_type != AT_NULL)
1776 size = vsize * sizeof(aux);
1779 KASSERT(0, ("Wrong proc vector type: %d", type));
1782 proc_vector32 = malloc(size, M_TEMP, M_WAITOK);
1783 if (proc_readmem(td, p, vptr, proc_vector32, size) != size) {
1787 if (type == PROC_AUX) {
1788 *proc_vectorp = (char **)proc_vector32;
1792 proc_vector = malloc(vsize * sizeof(char *), M_TEMP, M_WAITOK);
1793 for (i = 0; i < (int)vsize; i++)
1794 proc_vector[i] = PTRIN(proc_vector32[i]);
1795 *proc_vectorp = proc_vector;
1798 free(proc_vector32, M_TEMP);
1804 get_proc_vector(struct thread *td, struct proc *p, char ***proc_vectorp,
1805 size_t *vsizep, enum proc_vector_type type)
1807 struct ps_strings pss;
1809 vm_offset_t vptr, ptr;
1814 #ifdef COMPAT_FREEBSD32
1815 if (SV_PROC_FLAG(p, SV_ILP32) != 0)
1816 return (get_proc_vector32(td, p, proc_vectorp, vsizep, type));
1818 if (proc_readmem(td, p, (vm_offset_t)p->p_sysent->sv_psstrings, &pss,
1819 sizeof(pss)) != sizeof(pss))
1823 vptr = (vm_offset_t)pss.ps_argvstr;
1824 vsize = pss.ps_nargvstr;
1825 if (vsize > ARG_MAX)
1827 size = vsize * sizeof(char *);
1830 vptr = (vm_offset_t)pss.ps_envstr;
1831 vsize = pss.ps_nenvstr;
1832 if (vsize > ARG_MAX)
1834 size = vsize * sizeof(char *);
1838 * The aux array is just above env array on the stack. Check
1839 * that the address is naturally aligned.
1841 vptr = (vm_offset_t)pss.ps_envstr + (pss.ps_nenvstr + 1)
1843 #if __ELF_WORD_SIZE == 64
1844 if (vptr % sizeof(uint64_t) != 0)
1846 if (vptr % sizeof(uint32_t) != 0)
1850 * We count the array size reading the aux vectors from the
1851 * stack until AT_NULL vector is returned. So (to keep the code
1852 * simple) we read the process stack twice: the first time here
1853 * to find the size and the second time when copying the vectors
1854 * to the allocated proc_vector.
1856 for (ptr = vptr, i = 0; i < PROC_AUXV_MAX; i++) {
1857 if (proc_readmem(td, p, ptr, &aux, sizeof(aux)) !=
1860 if (aux.a_type == AT_NULL)
1865 * If the PROC_AUXV_MAX entries are iterated over, and we have
1866 * not reached AT_NULL, it is most likely we are reading wrong
1867 * data: either the process doesn't have auxv array or data has
1868 * been modified. Return the error in this case.
1870 if (aux.a_type != AT_NULL)
1873 size = vsize * sizeof(aux);
1876 KASSERT(0, ("Wrong proc vector type: %d", type));
1877 return (EINVAL); /* In case we are built without INVARIANTS. */
1879 proc_vector = malloc(size, M_TEMP, M_WAITOK);
1880 if (proc_readmem(td, p, vptr, proc_vector, size) != size) {
1881 free(proc_vector, M_TEMP);
1884 *proc_vectorp = proc_vector;
1890 #define GET_PS_STRINGS_CHUNK_SZ 256 /* Chunk size (bytes) for ps_strings operations. */
1893 get_ps_strings(struct thread *td, struct proc *p, struct sbuf *sb,
1894 enum proc_vector_type type)
1896 size_t done, len, nchr, vsize;
1898 char **proc_vector, *sptr;
1899 char pss_string[GET_PS_STRINGS_CHUNK_SZ];
1901 PROC_ASSERT_HELD(p);
1904 * We are not going to read more than 2 * (PATH_MAX + ARG_MAX) bytes.
1906 nchr = 2 * (PATH_MAX + ARG_MAX);
1908 error = get_proc_vector(td, p, &proc_vector, &vsize, type);
1911 for (done = 0, i = 0; i < (int)vsize && done < nchr; i++) {
1913 * The program may have scribbled into its argv array, e.g. to
1914 * remove some arguments. If that has happened, break out
1915 * before trying to read from NULL.
1917 if (proc_vector[i] == NULL)
1919 for (sptr = proc_vector[i]; ; sptr += GET_PS_STRINGS_CHUNK_SZ) {
1920 error = proc_read_string(td, p, sptr, pss_string,
1921 sizeof(pss_string));
1924 len = strnlen(pss_string, GET_PS_STRINGS_CHUNK_SZ);
1925 if (done + len >= nchr)
1926 len = nchr - done - 1;
1927 sbuf_bcat(sb, pss_string, len);
1928 if (len != GET_PS_STRINGS_CHUNK_SZ)
1930 done += GET_PS_STRINGS_CHUNK_SZ;
1932 sbuf_bcat(sb, "", 1);
1936 free(proc_vector, M_TEMP);
1941 proc_getargv(struct thread *td, struct proc *p, struct sbuf *sb)
1944 return (get_ps_strings(curthread, p, sb, PROC_ARG));
1948 proc_getenvv(struct thread *td, struct proc *p, struct sbuf *sb)
1951 return (get_ps_strings(curthread, p, sb, PROC_ENV));
1955 proc_getauxv(struct thread *td, struct proc *p, struct sbuf *sb)
1961 error = get_proc_vector(td, p, &auxv, &vsize, PROC_AUX);
1963 #ifdef COMPAT_FREEBSD32
1964 if (SV_PROC_FLAG(p, SV_ILP32) != 0)
1965 size = vsize * sizeof(Elf32_Auxinfo);
1968 size = vsize * sizeof(Elf_Auxinfo);
1969 if (sbuf_bcat(sb, auxv, size) != 0)
1977 * This sysctl allows a process to retrieve the argument list or process
1978 * title for another process without groping around in the address space
1979 * of the other process. It also allow a process to set its own "process
1980 * title to a string of its own choice.
1983 sysctl_kern_proc_args(SYSCTL_HANDLER_ARGS)
1985 int *name = (int *)arg1;
1986 u_int namelen = arg2;
1987 struct pargs *newpa, *pa;
1990 int flags, error = 0, error2;
1996 pid = (pid_t)name[0];
1998 * If the query is for this process and it is single-threaded, there
1999 * is nobody to modify pargs, thus we can just read.
2002 if (pid == p->p_pid && p->p_numthreads == 1 && req->newptr == NULL &&
2003 (pa = p->p_args) != NULL)
2004 return (SYSCTL_OUT(req, pa->ar_args, pa->ar_length));
2006 flags = PGET_CANSEE;
2007 if (req->newptr != NULL)
2008 flags |= PGET_ISCURRENT;
2009 error = pget(pid, flags, &p);
2017 error = SYSCTL_OUT(req, pa->ar_args, pa->ar_length);
2019 } else if ((p->p_flag & (P_WEXIT | P_SYSTEM)) == 0) {
2022 sbuf_new_for_sysctl(&sb, NULL, GET_PS_STRINGS_CHUNK_SZ, req);
2023 sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
2024 error = proc_getargv(curthread, p, &sb);
2025 error2 = sbuf_finish(&sb);
2028 if (error == 0 && error2 != 0)
2033 if (error != 0 || req->newptr == NULL)
2036 if (req->newlen > ps_arg_cache_limit - sizeof(struct pargs))
2039 if (req->newlen == 0) {
2041 * Clear the argument pointer, so that we'll fetch arguments
2042 * with proc_getargv() until further notice.
2046 newpa = pargs_alloc(req->newlen);
2047 error = SYSCTL_IN(req, newpa->ar_args, req->newlen);
2062 * This sysctl allows a process to retrieve environment of another process.
2065 sysctl_kern_proc_env(SYSCTL_HANDLER_ARGS)
2067 int *name = (int *)arg1;
2068 u_int namelen = arg2;
2076 error = pget((pid_t)name[0], PGET_WANTREAD, &p);
2079 if ((p->p_flag & P_SYSTEM) != 0) {
2084 sbuf_new_for_sysctl(&sb, NULL, GET_PS_STRINGS_CHUNK_SZ, req);
2085 sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
2086 error = proc_getenvv(curthread, p, &sb);
2087 error2 = sbuf_finish(&sb);
2090 return (error != 0 ? error : error2);
2094 * This sysctl allows a process to retrieve ELF auxiliary vector of
2098 sysctl_kern_proc_auxv(SYSCTL_HANDLER_ARGS)
2100 int *name = (int *)arg1;
2101 u_int namelen = arg2;
2109 error = pget((pid_t)name[0], PGET_WANTREAD, &p);
2112 if ((p->p_flag & P_SYSTEM) != 0) {
2116 sbuf_new_for_sysctl(&sb, NULL, GET_PS_STRINGS_CHUNK_SZ, req);
2117 sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
2118 error = proc_getauxv(curthread, p, &sb);
2119 error2 = sbuf_finish(&sb);
2122 return (error != 0 ? error : error2);
2126 * This sysctl allows a process to retrieve the path of the executable for
2127 * itself or another process.
2130 sysctl_kern_proc_pathname(SYSCTL_HANDLER_ARGS)
2132 pid_t *pidp = (pid_t *)arg1;
2133 unsigned int arglen = arg2;
2136 char *retbuf, *freebuf;
2141 if (*pidp == -1) { /* -1 means this process */
2142 p = req->td->td_proc;
2144 error = pget(*pidp, PGET_CANSEE, &p);
2158 error = vn_fullpath(req->td, vp, &retbuf, &freebuf);
2162 error = SYSCTL_OUT(req, retbuf, strlen(retbuf) + 1);
2163 free(freebuf, M_TEMP);
2168 sysctl_kern_proc_sv_name(SYSCTL_HANDLER_ARGS)
2181 error = pget((pid_t)name[0], PGET_CANSEE, &p);
2184 sv_name = p->p_sysent->sv_name;
2186 return (sysctl_handle_string(oidp, sv_name, 0, req));
2189 #ifdef KINFO_OVMENTRY_SIZE
2190 CTASSERT(sizeof(struct kinfo_ovmentry) == KINFO_OVMENTRY_SIZE);
2193 #ifdef COMPAT_FREEBSD7
2195 sysctl_kern_proc_ovmmap(SYSCTL_HANDLER_ARGS)
2197 vm_map_entry_t entry, tmp_entry;
2198 unsigned int last_timestamp;
2199 char *fullpath, *freepath;
2200 struct kinfo_ovmentry *kve;
2210 error = pget((pid_t)name[0], PGET_WANTREAD, &p);
2213 vm = vmspace_acquire_ref(p);
2218 kve = malloc(sizeof(*kve), M_TEMP, M_WAITOK);
2221 vm_map_lock_read(map);
2222 for (entry = map->header.next; entry != &map->header;
2223 entry = entry->next) {
2224 vm_object_t obj, tobj, lobj;
2227 if (entry->eflags & MAP_ENTRY_IS_SUB_MAP)
2230 bzero(kve, sizeof(*kve));
2231 kve->kve_structsize = sizeof(*kve);
2233 kve->kve_private_resident = 0;
2234 obj = entry->object.vm_object;
2236 VM_OBJECT_RLOCK(obj);
2237 if (obj->shadow_count == 1)
2238 kve->kve_private_resident =
2239 obj->resident_page_count;
2241 kve->kve_resident = 0;
2242 addr = entry->start;
2243 while (addr < entry->end) {
2244 if (pmap_extract(map->pmap, addr))
2245 kve->kve_resident++;
2249 for (lobj = tobj = obj; tobj; tobj = tobj->backing_object) {
2251 VM_OBJECT_RLOCK(tobj);
2252 kve->kve_offset += tobj->backing_object_offset;
2255 VM_OBJECT_RUNLOCK(lobj);
2259 kve->kve_start = (void*)entry->start;
2260 kve->kve_end = (void*)entry->end;
2261 kve->kve_offset += (off_t)entry->offset;
2263 if (entry->protection & VM_PROT_READ)
2264 kve->kve_protection |= KVME_PROT_READ;
2265 if (entry->protection & VM_PROT_WRITE)
2266 kve->kve_protection |= KVME_PROT_WRITE;
2267 if (entry->protection & VM_PROT_EXECUTE)
2268 kve->kve_protection |= KVME_PROT_EXEC;
2270 if (entry->eflags & MAP_ENTRY_COW)
2271 kve->kve_flags |= KVME_FLAG_COW;
2272 if (entry->eflags & MAP_ENTRY_NEEDS_COPY)
2273 kve->kve_flags |= KVME_FLAG_NEEDS_COPY;
2274 if (entry->eflags & MAP_ENTRY_NOCOREDUMP)
2275 kve->kve_flags |= KVME_FLAG_NOCOREDUMP;
2277 last_timestamp = map->timestamp;
2278 vm_map_unlock_read(map);
2280 kve->kve_fileid = 0;
2285 kve->kve_type = vm_object_kvme_type(lobj, &vp);
2286 if (kve->kve_type == KVME_TYPE_MGTDEVICE)
2287 kve->kve_type = KVME_TYPE_UNKNOWN;
2291 VM_OBJECT_RUNLOCK(lobj);
2293 kve->kve_ref_count = obj->ref_count;
2294 kve->kve_shadow_count = obj->shadow_count;
2295 VM_OBJECT_RUNLOCK(obj);
2297 vn_fullpath(curthread, vp, &fullpath,
2299 cred = curthread->td_ucred;
2300 vn_lock(vp, LK_SHARED | LK_RETRY);
2301 if (VOP_GETATTR(vp, &va, cred) == 0) {
2302 kve->kve_fileid = va.va_fileid;
2304 kve->kve_fsid = va.va_fsid;
2309 kve->kve_type = KVME_TYPE_NONE;
2310 kve->kve_ref_count = 0;
2311 kve->kve_shadow_count = 0;
2314 strlcpy(kve->kve_path, fullpath, sizeof(kve->kve_path));
2315 if (freepath != NULL)
2316 free(freepath, M_TEMP);
2318 error = SYSCTL_OUT(req, kve, sizeof(*kve));
2319 vm_map_lock_read(map);
2322 if (last_timestamp != map->timestamp) {
2323 vm_map_lookup_entry(map, addr - 1, &tmp_entry);
2327 vm_map_unlock_read(map);
2333 #endif /* COMPAT_FREEBSD7 */
2335 #ifdef KINFO_VMENTRY_SIZE
2336 CTASSERT(sizeof(struct kinfo_vmentry) == KINFO_VMENTRY_SIZE);
2340 kern_proc_vmmap_resident(vm_map_t map, vm_map_entry_t entry,
2341 int *resident_count, bool *super)
2343 vm_object_t obj, tobj;
2346 vm_paddr_t locked_pa;
2347 vm_pindex_t pi, pi_adv, pindex;
2350 *resident_count = 0;
2351 if (vmmap_skip_res_cnt)
2355 obj = entry->object.vm_object;
2356 addr = entry->start;
2358 pi = OFF_TO_IDX(entry->offset);
2359 for (; addr < entry->end; addr += IDX_TO_OFF(pi_adv), pi += pi_adv) {
2360 if (m_adv != NULL) {
2363 pi_adv = atop(entry->end - addr);
2365 for (tobj = obj;; tobj = tobj->backing_object) {
2366 m = vm_page_find_least(tobj, pindex);
2368 if (m->pindex == pindex)
2370 if (pi_adv > m->pindex - pindex) {
2371 pi_adv = m->pindex - pindex;
2375 if (tobj->backing_object == NULL)
2377 pindex += OFF_TO_IDX(tobj->
2378 backing_object_offset);
2382 if (m->psind != 0 && addr + pagesizes[1] <= entry->end &&
2383 (addr & (pagesizes[1] - 1)) == 0 &&
2384 (pmap_mincore(map->pmap, addr, &locked_pa) &
2385 MINCORE_SUPER) != 0) {
2387 pi_adv = atop(pagesizes[1]);
2390 * We do not test the found page on validity.
2391 * Either the page is busy and being paged in,
2392 * or it was invalidated. The first case
2393 * should be counted as resident, the second
2394 * is not so clear; we do account both.
2398 *resident_count += pi_adv;
2401 PA_UNLOCK_COND(locked_pa);
2405 * Must be called with the process locked and will return unlocked.
2408 kern_proc_vmmap_out(struct proc *p, struct sbuf *sb, ssize_t maxlen, int flags)
2410 vm_map_entry_t entry, tmp_entry;
2413 vm_object_t obj, tobj, lobj;
2414 char *fullpath, *freepath;
2415 struct kinfo_vmentry *kve;
2420 unsigned int last_timestamp;
2424 PROC_LOCK_ASSERT(p, MA_OWNED);
2428 vm = vmspace_acquire_ref(p);
2433 kve = malloc(sizeof(*kve), M_TEMP, M_WAITOK | M_ZERO);
2437 vm_map_lock_read(map);
2438 for (entry = map->header.next; entry != &map->header;
2439 entry = entry->next) {
2440 if (entry->eflags & MAP_ENTRY_IS_SUB_MAP)
2444 bzero(kve, sizeof(*kve));
2445 obj = entry->object.vm_object;
2447 for (tobj = obj; tobj != NULL;
2448 tobj = tobj->backing_object) {
2449 VM_OBJECT_RLOCK(tobj);
2450 kve->kve_offset += tobj->backing_object_offset;
2453 if (obj->backing_object == NULL)
2454 kve->kve_private_resident =
2455 obj->resident_page_count;
2456 kern_proc_vmmap_resident(map, entry,
2457 &kve->kve_resident, &super);
2459 kve->kve_flags |= KVME_FLAG_SUPER;
2460 for (tobj = obj; tobj != NULL;
2461 tobj = tobj->backing_object) {
2462 if (tobj != obj && tobj != lobj)
2463 VM_OBJECT_RUNLOCK(tobj);
2469 kve->kve_start = entry->start;
2470 kve->kve_end = entry->end;
2471 kve->kve_offset += entry->offset;
2473 if (entry->protection & VM_PROT_READ)
2474 kve->kve_protection |= KVME_PROT_READ;
2475 if (entry->protection & VM_PROT_WRITE)
2476 kve->kve_protection |= KVME_PROT_WRITE;
2477 if (entry->protection & VM_PROT_EXECUTE)
2478 kve->kve_protection |= KVME_PROT_EXEC;
2480 if (entry->eflags & MAP_ENTRY_COW)
2481 kve->kve_flags |= KVME_FLAG_COW;
2482 if (entry->eflags & MAP_ENTRY_NEEDS_COPY)
2483 kve->kve_flags |= KVME_FLAG_NEEDS_COPY;
2484 if (entry->eflags & MAP_ENTRY_NOCOREDUMP)
2485 kve->kve_flags |= KVME_FLAG_NOCOREDUMP;
2486 if (entry->eflags & MAP_ENTRY_GROWS_UP)
2487 kve->kve_flags |= KVME_FLAG_GROWS_UP;
2488 if (entry->eflags & MAP_ENTRY_GROWS_DOWN)
2489 kve->kve_flags |= KVME_FLAG_GROWS_DOWN;
2490 if (entry->eflags & MAP_ENTRY_USER_WIRED)
2491 kve->kve_flags |= KVME_FLAG_USER_WIRED;
2493 last_timestamp = map->timestamp;
2494 vm_map_unlock_read(map);
2499 kve->kve_type = vm_object_kvme_type(lobj, &vp);
2503 VM_OBJECT_RUNLOCK(lobj);
2505 kve->kve_ref_count = obj->ref_count;
2506 kve->kve_shadow_count = obj->shadow_count;
2507 VM_OBJECT_RUNLOCK(obj);
2509 vn_fullpath(curthread, vp, &fullpath,
2511 kve->kve_vn_type = vntype_to_kinfo(vp->v_type);
2512 cred = curthread->td_ucred;
2513 vn_lock(vp, LK_SHARED | LK_RETRY);
2514 if (VOP_GETATTR(vp, &va, cred) == 0) {
2515 kve->kve_vn_fileid = va.va_fileid;
2516 kve->kve_vn_fsid = va.va_fsid;
2517 kve->kve_vn_fsid_freebsd11 =
2518 kve->kve_vn_fsid; /* truncate */
2520 MAKEIMODE(va.va_type, va.va_mode);
2521 kve->kve_vn_size = va.va_size;
2522 kve->kve_vn_rdev = va.va_rdev;
2523 kve->kve_vn_rdev_freebsd11 =
2524 kve->kve_vn_rdev; /* truncate */
2525 kve->kve_status = KF_ATTR_VALID;
2530 kve->kve_type = KVME_TYPE_NONE;
2531 kve->kve_ref_count = 0;
2532 kve->kve_shadow_count = 0;
2535 strlcpy(kve->kve_path, fullpath, sizeof(kve->kve_path));
2536 if (freepath != NULL)
2537 free(freepath, M_TEMP);
2539 /* Pack record size down */
2540 if ((flags & KERN_VMMAP_PACK_KINFO) != 0)
2541 kve->kve_structsize =
2542 offsetof(struct kinfo_vmentry, kve_path) +
2543 strlen(kve->kve_path) + 1;
2545 kve->kve_structsize = sizeof(*kve);
2546 kve->kve_structsize = roundup(kve->kve_structsize,
2549 /* Halt filling and truncate rather than exceeding maxlen */
2550 if (maxlen != -1 && maxlen < kve->kve_structsize) {
2552 vm_map_lock_read(map);
2554 } else if (maxlen != -1)
2555 maxlen -= kve->kve_structsize;
2557 if (sbuf_bcat(sb, kve, kve->kve_structsize) != 0)
2559 vm_map_lock_read(map);
2562 if (last_timestamp != map->timestamp) {
2563 vm_map_lookup_entry(map, addr - 1, &tmp_entry);
2567 vm_map_unlock_read(map);
2575 sysctl_kern_proc_vmmap(SYSCTL_HANDLER_ARGS)
2579 int error, error2, *name;
2582 sbuf_new_for_sysctl(&sb, NULL, sizeof(struct kinfo_vmentry), req);
2583 sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
2584 error = pget((pid_t)name[0], PGET_CANDEBUG | PGET_NOTWEXIT, &p);
2589 error = kern_proc_vmmap_out(p, &sb, -1, KERN_VMMAP_PACK_KINFO);
2590 error2 = sbuf_finish(&sb);
2592 return (error != 0 ? error : error2);
2595 #if defined(STACK) || defined(DDB)
2597 sysctl_kern_proc_kstack(SYSCTL_HANDLER_ARGS)
2599 struct kinfo_kstack *kkstp;
2600 int error, i, *name, numthreads;
2601 lwpid_t *lwpidarray;
2608 error = pget((pid_t)name[0], PGET_NOTINEXEC | PGET_WANTREAD, &p);
2612 kkstp = malloc(sizeof(*kkstp), M_TEMP, M_WAITOK);
2613 st = stack_create(M_WAITOK);
2618 if (lwpidarray != NULL) {
2619 free(lwpidarray, M_TEMP);
2622 numthreads = p->p_numthreads;
2624 lwpidarray = malloc(sizeof(*lwpidarray) * numthreads, M_TEMP,
2627 } while (numthreads < p->p_numthreads);
2630 * XXXRW: During the below loop, execve(2) and countless other sorts
2631 * of changes could have taken place. Should we check to see if the
2632 * vmspace has been replaced, or the like, in order to prevent
2633 * giving a snapshot that spans, say, execve(2), with some threads
2634 * before and some after? Among other things, the credentials could
2635 * have changed, in which case the right to extract debug info might
2636 * no longer be assured.
2639 FOREACH_THREAD_IN_PROC(p, td) {
2640 KASSERT(i < numthreads,
2641 ("sysctl_kern_proc_kstack: numthreads"));
2642 lwpidarray[i] = td->td_tid;
2646 for (i = 0; i < numthreads; i++) {
2647 td = thread_find(p, lwpidarray[i]);
2651 bzero(kkstp, sizeof(*kkstp));
2652 (void)sbuf_new(&sb, kkstp->kkst_trace,
2653 sizeof(kkstp->kkst_trace), SBUF_FIXEDLEN);
2655 kkstp->kkst_tid = td->td_tid;
2656 if (TD_IS_SWAPPED(td)) {
2657 kkstp->kkst_state = KKST_STATE_SWAPPED;
2658 } else if (TD_IS_RUNNING(td)) {
2659 if (stack_save_td_running(st, td) == 0)
2660 kkstp->kkst_state = KKST_STATE_STACKOK;
2662 kkstp->kkst_state = KKST_STATE_RUNNING;
2664 kkstp->kkst_state = KKST_STATE_STACKOK;
2665 stack_save_td(st, td);
2669 stack_sbuf_print(&sb, st);
2672 error = SYSCTL_OUT(req, kkstp, sizeof(*kkstp));
2679 if (lwpidarray != NULL)
2680 free(lwpidarray, M_TEMP);
2682 free(kkstp, M_TEMP);
2688 * This sysctl allows a process to retrieve the full list of groups from
2689 * itself or another process.
2692 sysctl_kern_proc_groups(SYSCTL_HANDLER_ARGS)
2694 pid_t *pidp = (pid_t *)arg1;
2695 unsigned int arglen = arg2;
2702 if (*pidp == -1) { /* -1 means this process */
2703 p = req->td->td_proc;
2706 error = pget(*pidp, PGET_CANSEE, &p);
2711 cred = crhold(p->p_ucred);
2714 error = SYSCTL_OUT(req, cred->cr_groups,
2715 cred->cr_ngroups * sizeof(gid_t));
2721 * This sysctl allows a process to retrieve or/and set the resource limit for
2725 sysctl_kern_proc_rlimit(SYSCTL_HANDLER_ARGS)
2727 int *name = (int *)arg1;
2728 u_int namelen = arg2;
2737 which = (u_int)name[1];
2738 if (which >= RLIM_NLIMITS)
2741 if (req->newptr != NULL && req->newlen != sizeof(rlim))
2744 flags = PGET_HOLD | PGET_NOTWEXIT;
2745 if (req->newptr != NULL)
2746 flags |= PGET_CANDEBUG;
2748 flags |= PGET_CANSEE;
2749 error = pget((pid_t)name[0], flags, &p);
2756 if (req->oldptr != NULL) {
2758 lim_rlimit_proc(p, which, &rlim);
2761 error = SYSCTL_OUT(req, &rlim, sizeof(rlim));
2768 if (req->newptr != NULL) {
2769 error = SYSCTL_IN(req, &rlim, sizeof(rlim));
2771 error = kern_proc_setrlimit(curthread, p, which, &rlim);
2780 * This sysctl allows a process to retrieve ps_strings structure location of
2784 sysctl_kern_proc_ps_strings(SYSCTL_HANDLER_ARGS)
2786 int *name = (int *)arg1;
2787 u_int namelen = arg2;
2789 vm_offset_t ps_strings;
2791 #ifdef COMPAT_FREEBSD32
2792 uint32_t ps_strings32;
2798 error = pget((pid_t)name[0], PGET_CANDEBUG, &p);
2801 #ifdef COMPAT_FREEBSD32
2802 if ((req->flags & SCTL_MASK32) != 0) {
2804 * We return 0 if the 32 bit emulation request is for a 64 bit
2807 ps_strings32 = SV_PROC_FLAG(p, SV_ILP32) != 0 ?
2808 PTROUT(p->p_sysent->sv_psstrings) : 0;
2810 error = SYSCTL_OUT(req, &ps_strings32, sizeof(ps_strings32));
2814 ps_strings = p->p_sysent->sv_psstrings;
2816 error = SYSCTL_OUT(req, &ps_strings, sizeof(ps_strings));
2821 * This sysctl allows a process to retrieve umask of another process.
2824 sysctl_kern_proc_umask(SYSCTL_HANDLER_ARGS)
2826 int *name = (int *)arg1;
2827 u_int namelen = arg2;
2836 pid = (pid_t)name[0];
2838 if (pid == p->p_pid || pid == 0) {
2839 fd_cmask = p->p_fd->fd_cmask;
2843 error = pget(pid, PGET_WANTREAD, &p);
2847 fd_cmask = p->p_fd->fd_cmask;
2850 error = SYSCTL_OUT(req, &fd_cmask, sizeof(fd_cmask));
2855 * This sysctl allows a process to set and retrieve binary osreldate of
2859 sysctl_kern_proc_osrel(SYSCTL_HANDLER_ARGS)
2861 int *name = (int *)arg1;
2862 u_int namelen = arg2;
2864 int flags, error, osrel;
2869 if (req->newptr != NULL && req->newlen != sizeof(osrel))
2872 flags = PGET_HOLD | PGET_NOTWEXIT;
2873 if (req->newptr != NULL)
2874 flags |= PGET_CANDEBUG;
2876 flags |= PGET_CANSEE;
2877 error = pget((pid_t)name[0], flags, &p);
2881 error = SYSCTL_OUT(req, &p->p_osrel, sizeof(p->p_osrel));
2885 if (req->newptr != NULL) {
2886 error = SYSCTL_IN(req, &osrel, sizeof(osrel));
2901 sysctl_kern_proc_sigtramp(SYSCTL_HANDLER_ARGS)
2903 int *name = (int *)arg1;
2904 u_int namelen = arg2;
2906 struct kinfo_sigtramp kst;
2907 const struct sysentvec *sv;
2909 #ifdef COMPAT_FREEBSD32
2910 struct kinfo_sigtramp32 kst32;
2916 error = pget((pid_t)name[0], PGET_CANDEBUG, &p);
2920 #ifdef COMPAT_FREEBSD32
2921 if ((req->flags & SCTL_MASK32) != 0) {
2922 bzero(&kst32, sizeof(kst32));
2923 if (SV_PROC_FLAG(p, SV_ILP32)) {
2924 if (sv->sv_sigcode_base != 0) {
2925 kst32.ksigtramp_start = sv->sv_sigcode_base;
2926 kst32.ksigtramp_end = sv->sv_sigcode_base +
2929 kst32.ksigtramp_start = sv->sv_psstrings -
2931 kst32.ksigtramp_end = sv->sv_psstrings;
2935 error = SYSCTL_OUT(req, &kst32, sizeof(kst32));
2939 bzero(&kst, sizeof(kst));
2940 if (sv->sv_sigcode_base != 0) {
2941 kst.ksigtramp_start = (char *)sv->sv_sigcode_base;
2942 kst.ksigtramp_end = (char *)sv->sv_sigcode_base +
2945 kst.ksigtramp_start = (char *)sv->sv_psstrings -
2947 kst.ksigtramp_end = (char *)sv->sv_psstrings;
2950 error = SYSCTL_OUT(req, &kst, sizeof(kst));
2954 SYSCTL_NODE(_kern, KERN_PROC, proc, CTLFLAG_RD, 0, "Process table");
2956 SYSCTL_PROC(_kern_proc, KERN_PROC_ALL, all, CTLFLAG_RD|CTLTYPE_STRUCT|
2957 CTLFLAG_MPSAFE, 0, 0, sysctl_kern_proc, "S,proc",
2958 "Return entire process table");
2960 static SYSCTL_NODE(_kern_proc, KERN_PROC_GID, gid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2961 sysctl_kern_proc, "Process table");
2963 static SYSCTL_NODE(_kern_proc, KERN_PROC_PGRP, pgrp, CTLFLAG_RD | CTLFLAG_MPSAFE,
2964 sysctl_kern_proc, "Process table");
2966 static SYSCTL_NODE(_kern_proc, KERN_PROC_RGID, rgid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2967 sysctl_kern_proc, "Process table");
2969 static SYSCTL_NODE(_kern_proc, KERN_PROC_SESSION, sid, CTLFLAG_RD |
2970 CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2972 static SYSCTL_NODE(_kern_proc, KERN_PROC_TTY, tty, CTLFLAG_RD | CTLFLAG_MPSAFE,
2973 sysctl_kern_proc, "Process table");
2975 static SYSCTL_NODE(_kern_proc, KERN_PROC_UID, uid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2976 sysctl_kern_proc, "Process table");
2978 static SYSCTL_NODE(_kern_proc, KERN_PROC_RUID, ruid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2979 sysctl_kern_proc, "Process table");
2981 static SYSCTL_NODE(_kern_proc, KERN_PROC_PID, pid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2982 sysctl_kern_proc, "Process table");
2984 static SYSCTL_NODE(_kern_proc, KERN_PROC_PROC, proc, CTLFLAG_RD | CTLFLAG_MPSAFE,
2985 sysctl_kern_proc, "Return process table, no threads");
2987 static SYSCTL_NODE(_kern_proc, KERN_PROC_ARGS, args,
2988 CTLFLAG_RW | CTLFLAG_CAPWR | CTLFLAG_ANYBODY | CTLFLAG_MPSAFE,
2989 sysctl_kern_proc_args, "Process argument list");
2991 static SYSCTL_NODE(_kern_proc, KERN_PROC_ENV, env, CTLFLAG_RD | CTLFLAG_MPSAFE,
2992 sysctl_kern_proc_env, "Process environment");
2994 static SYSCTL_NODE(_kern_proc, KERN_PROC_AUXV, auxv, CTLFLAG_RD |
2995 CTLFLAG_MPSAFE, sysctl_kern_proc_auxv, "Process ELF auxiliary vector");
2997 static SYSCTL_NODE(_kern_proc, KERN_PROC_PATHNAME, pathname, CTLFLAG_RD |
2998 CTLFLAG_MPSAFE, sysctl_kern_proc_pathname, "Process executable path");
3000 static SYSCTL_NODE(_kern_proc, KERN_PROC_SV_NAME, sv_name, CTLFLAG_RD |
3001 CTLFLAG_MPSAFE, sysctl_kern_proc_sv_name,
3002 "Process syscall vector name (ABI type)");
3004 static SYSCTL_NODE(_kern_proc, (KERN_PROC_GID | KERN_PROC_INC_THREAD), gid_td,
3005 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
3007 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PGRP | KERN_PROC_INC_THREAD), pgrp_td,
3008 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
3010 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RGID | KERN_PROC_INC_THREAD), rgid_td,
3011 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
3013 static SYSCTL_NODE(_kern_proc, (KERN_PROC_SESSION | KERN_PROC_INC_THREAD),
3014 sid_td, CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
3016 static SYSCTL_NODE(_kern_proc, (KERN_PROC_TTY | KERN_PROC_INC_THREAD), tty_td,
3017 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
3019 static SYSCTL_NODE(_kern_proc, (KERN_PROC_UID | KERN_PROC_INC_THREAD), uid_td,
3020 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
3022 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RUID | KERN_PROC_INC_THREAD), ruid_td,
3023 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
3025 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PID | KERN_PROC_INC_THREAD), pid_td,
3026 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
3028 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PROC | KERN_PROC_INC_THREAD), proc_td,
3029 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc,
3030 "Return process table, no threads");
3032 #ifdef COMPAT_FREEBSD7
3033 static SYSCTL_NODE(_kern_proc, KERN_PROC_OVMMAP, ovmmap, CTLFLAG_RD |
3034 CTLFLAG_MPSAFE, sysctl_kern_proc_ovmmap, "Old Process vm map entries");
3037 static SYSCTL_NODE(_kern_proc, KERN_PROC_VMMAP, vmmap, CTLFLAG_RD |
3038 CTLFLAG_MPSAFE, sysctl_kern_proc_vmmap, "Process vm map entries");
3040 #if defined(STACK) || defined(DDB)
3041 static SYSCTL_NODE(_kern_proc, KERN_PROC_KSTACK, kstack, CTLFLAG_RD |
3042 CTLFLAG_MPSAFE, sysctl_kern_proc_kstack, "Process kernel stacks");
3045 static SYSCTL_NODE(_kern_proc, KERN_PROC_GROUPS, groups, CTLFLAG_RD |
3046 CTLFLAG_MPSAFE, sysctl_kern_proc_groups, "Process groups");
3048 static SYSCTL_NODE(_kern_proc, KERN_PROC_RLIMIT, rlimit, CTLFLAG_RW |
3049 CTLFLAG_ANYBODY | CTLFLAG_MPSAFE, sysctl_kern_proc_rlimit,
3050 "Process resource limits");
3052 static SYSCTL_NODE(_kern_proc, KERN_PROC_PS_STRINGS, ps_strings, CTLFLAG_RD |
3053 CTLFLAG_MPSAFE, sysctl_kern_proc_ps_strings,
3054 "Process ps_strings location");
3056 static SYSCTL_NODE(_kern_proc, KERN_PROC_UMASK, umask, CTLFLAG_RD |
3057 CTLFLAG_MPSAFE, sysctl_kern_proc_umask, "Process umask");
3059 static SYSCTL_NODE(_kern_proc, KERN_PROC_OSREL, osrel, CTLFLAG_RW |
3060 CTLFLAG_ANYBODY | CTLFLAG_MPSAFE, sysctl_kern_proc_osrel,
3061 "Process binary osreldate");
3063 static SYSCTL_NODE(_kern_proc, KERN_PROC_SIGTRAMP, sigtramp, CTLFLAG_RD |
3064 CTLFLAG_MPSAFE, sysctl_kern_proc_sigtramp,
3065 "Process signal trampoline location");
3070 * stop_all_proc() purpose is to stop all process which have usermode,
3071 * except current process for obvious reasons. This makes it somewhat
3072 * unreliable when invoked from multithreaded process. The service
3073 * must not be user-callable anyway.
3078 struct proc *cp, *p;
3080 bool restart, seen_stopped, seen_exiting, stopped_some;
3084 sx_xlock(&allproc_lock);
3086 seen_exiting = seen_stopped = stopped_some = restart = false;
3087 LIST_REMOVE(cp, p_list);
3088 LIST_INSERT_HEAD(&allproc, cp, p_list);
3090 p = LIST_NEXT(cp, p_list);
3093 LIST_REMOVE(cp, p_list);
3094 LIST_INSERT_AFTER(p, cp, p_list);
3096 if ((p->p_flag & (P_KPROC | P_SYSTEM | P_TOTAL_STOP)) != 0) {
3100 if ((p->p_flag & P_WEXIT) != 0) {
3101 seen_exiting = true;
3105 if (P_SHOULDSTOP(p) == P_STOPPED_SINGLE) {
3107 * Stopped processes are tolerated when there
3108 * are no other processes which might continue
3109 * them. P_STOPPED_SINGLE but not
3110 * P_TOTAL_STOP process still has at least one
3113 seen_stopped = true;
3117 sx_xunlock(&allproc_lock);
3119 r = thread_single(p, SINGLE_ALLPROC);
3123 stopped_some = true;
3126 sx_xlock(&allproc_lock);
3128 /* Catch forked children we did not see in iteration. */
3129 if (gen != allproc_gen)
3131 sx_xunlock(&allproc_lock);
3132 if (restart || stopped_some || seen_exiting || seen_stopped) {
3133 kern_yield(PRI_USER);
3139 resume_all_proc(void)
3141 struct proc *cp, *p;
3144 sx_xlock(&allproc_lock);
3146 LIST_REMOVE(cp, p_list);
3147 LIST_INSERT_HEAD(&allproc, cp, p_list);
3149 p = LIST_NEXT(cp, p_list);
3152 LIST_REMOVE(cp, p_list);
3153 LIST_INSERT_AFTER(p, cp, p_list);
3155 if ((p->p_flag & P_TOTAL_STOP) != 0) {
3156 sx_xunlock(&allproc_lock);
3158 thread_single_end(p, SINGLE_ALLPROC);
3161 sx_xlock(&allproc_lock);
3166 /* Did the loop above missed any stopped process ? */
3167 FOREACH_PROC_IN_SYSTEM(p) {
3168 /* No need for proc lock. */
3169 if ((p->p_flag & P_TOTAL_STOP) != 0)
3172 sx_xunlock(&allproc_lock);
3175 /* #define TOTAL_STOP_DEBUG 1 */
3176 #ifdef TOTAL_STOP_DEBUG
3177 volatile static int ap_resume;
3178 #include <sys/mount.h>
3181 sysctl_debug_stop_all_proc(SYSCTL_HANDLER_ARGS)
3187 error = sysctl_handle_int(oidp, &val, 0, req);
3188 if (error != 0 || req->newptr == NULL)
3193 while (ap_resume == 0)
3201 SYSCTL_PROC(_debug, OID_AUTO, stop_all_proc, CTLTYPE_INT | CTLFLAG_RW |
3202 CTLFLAG_MPSAFE, __DEVOLATILE(int *, &ap_resume), 0,
3203 sysctl_debug_stop_all_proc, "I",