FreeBSD/Linux Kernel Cross Reference
sys/ddb/db_ps.c
1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1993 The Regents of the University of California.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
34
35 #include "opt_kstack_pages.h"
36
37 #include <sys/param.h>
38 #include <sys/cons.h>
39 #include <sys/jail.h>
40 #include <sys/kdb.h>
41 #include <sys/kernel.h>
42 #include <sys/proc.h>
43 #include <sys/sysent.h>
44 #include <sys/systm.h>
45 #include <sys/_kstack_cache.h>
46 #include <vm/vm.h>
47 #include <vm/vm_param.h>
48 #include <vm/pmap.h>
49 #include <vm/vm_map.h>
50
51 #include <ddb/ddb.h>
52
53 #define PRINT_NONE 0
54 #define PRINT_ARGS 1
55
56 static void dumpthread(volatile struct proc *p, volatile struct thread *td,
57 int all);
58 static int ps_mode;
59
60 /*
61 * At least one non-optional show-command must be implemented using
62 * DB_SHOW_ALL_COMMAND() so that db_show_all_cmd_set gets created.
63 * Here is one.
64 */
65 DB_SHOW_ALL_COMMAND(procs, db_procs_cmd)
66 {
67 db_ps(addr, have_addr, count, modif);
68 }
69
70 static void
71 dump_args(volatile struct proc *p)
72 {
73 char *args;
74 int i, len;
75
76 if (p->p_args == NULL)
77 return;
78 args = p->p_args->ar_args;
79 len = (int)p->p_args->ar_length;
80 for (i = 0; i < len; i++) {
81 if (args[i] == '\0')
82 db_printf(" ");
83 else
84 db_printf("%c", args[i]);
85 }
86 }
87
88 /*
89 * Layout:
90 * - column counts
91 * - header
92 * - single-threaded process
93 * - multi-threaded process
94 * - thread in a MT process
95 *
96 * 1 2 3 4 5 6 7
97 * 1234567890123456789012345678901234567890123456789012345678901234567890
98 * pid ppid pgrp uid state wmesg wchan cmd
99 * <pid> <ppi> <pgi> <uid> <stat> <wmesg> <wchan > <name>
100 * <pid> <ppi> <pgi> <uid> <stat> (threaded) <command>
101 * <tid > <stat> <wmesg> <wchan > <name>
102 *
103 * For machines with 64-bit pointers, we expand the wchan field 8 more
104 * characters.
105 */
106 void
107 db_ps(db_expr_t addr, bool hasaddr, db_expr_t count, char *modif)
108 {
109 volatile struct proc *p, *pp;
110 volatile struct thread *td;
111 struct ucred *cred;
112 struct pgrp *pgrp;
113 char state[9];
114 int np, rflag, sflag, dflag, lflag, wflag;
115
116 ps_mode = modif[0] == 'a' ? PRINT_ARGS : PRINT_NONE;
117 np = nprocs;
118
119 if (!LIST_EMPTY(&allproc))
120 p = LIST_FIRST(&allproc);
121 else
122 p = &proc0;
123
124 #ifdef __LP64__
125 db_printf(" pid ppid pgrp uid state wmesg wchan cmd\n");
126 #else
127 db_printf(" pid ppid pgrp uid state wmesg wchan cmd\n");
128 #endif
129 while (--np >= 0 && !db_pager_quit) {
130 if (p == NULL) {
131 db_printf("oops, ran out of processes early!\n");
132 break;
133 }
134 pp = p->p_pptr;
135 if (pp == NULL)
136 pp = p;
137
138 cred = p->p_ucred;
139 pgrp = p->p_pgrp;
140 db_printf("%5d %5d %5d %5d ", p->p_pid, pp->p_pid,
141 pgrp != NULL ? pgrp->pg_id : 0,
142 cred != NULL ? cred->cr_ruid : 0);
143
144 /* Determine our primary process state. */
145 switch (p->p_state) {
146 case PRS_NORMAL:
147 if (P_SHOULDSTOP(p))
148 state[0] = 'T';
149 else {
150 /*
151 * One of D, L, R, S, W. For a
152 * multithreaded process we will use
153 * the state of the thread with the
154 * highest precedence. The
155 * precendence order from high to low
156 * is R, L, D, S, W. If no thread is
157 * in a sane state we use '?' for our
158 * primary state.
159 */
160 rflag = sflag = dflag = lflag = wflag = 0;
161 FOREACH_THREAD_IN_PROC(p, td) {
162 if (td->td_state == TDS_RUNNING ||
163 td->td_state == TDS_RUNQ ||
164 td->td_state == TDS_CAN_RUN)
165 rflag++;
166 if (TD_ON_LOCK(td))
167 lflag++;
168 if (TD_IS_SLEEPING(td)) {
169 if (!(td->td_flags & TDF_SINTR))
170 dflag++;
171 else
172 sflag++;
173 }
174 if (TD_AWAITING_INTR(td))
175 wflag++;
176 }
177 if (rflag)
178 state[0] = 'R';
179 else if (lflag)
180 state[0] = 'L';
181 else if (dflag)
182 state[0] = 'D';
183 else if (sflag)
184 state[0] = 'S';
185 else if (wflag)
186 state[0] = 'W';
187 else
188 state[0] = '?';
189 }
190 break;
191 case PRS_NEW:
192 state[0] = 'N';
193 break;
194 case PRS_ZOMBIE:
195 state[0] = 'Z';
196 break;
197 default:
198 state[0] = 'U';
199 break;
200 }
201 state[1] = '\0';
202
203 /* Additional process state flags. */
204 if (!(p->p_flag & P_INMEM))
205 strlcat(state, "W", sizeof(state));
206 if (p->p_flag & P_TRACED)
207 strlcat(state, "X", sizeof(state));
208 if (p->p_flag & P_WEXIT && p->p_state != PRS_ZOMBIE)
209 strlcat(state, "E", sizeof(state));
210 if (p->p_flag & P_PPWAIT)
211 strlcat(state, "V", sizeof(state));
212 if (p->p_flag & P_SYSTEM || p->p_lock > 0)
213 strlcat(state, "L", sizeof(state));
214 if (p->p_pgrp != NULL && p->p_session != NULL &&
215 SESS_LEADER(p))
216 strlcat(state, "s", sizeof(state));
217 /* Cheated here and didn't compare pgid's. */
218 if (p->p_flag & P_CONTROLT)
219 strlcat(state, "+", sizeof(state));
220 if (cred != NULL && jailed(cred))
221 strlcat(state, "J", sizeof(state));
222 db_printf(" %-6.6s ", state);
223 if (p->p_flag & P_HADTHREADS) {
224 #ifdef __LP64__
225 db_printf(" (threaded) ");
226 #else
227 db_printf(" (threaded) ");
228 #endif
229 if (p->p_flag & P_SYSTEM)
230 db_printf("[");
231 db_printf("%s", p->p_comm);
232 if (p->p_flag & P_SYSTEM)
233 db_printf("]");
234 if (ps_mode == PRINT_ARGS) {
235 db_printf(" ");
236 dump_args(p);
237 }
238 db_printf("\n");
239 }
240 FOREACH_THREAD_IN_PROC(p, td) {
241 dumpthread(p, td, p->p_flag & P_HADTHREADS);
242 if (db_pager_quit)
243 break;
244 }
245
246 p = LIST_NEXT(p, p_list);
247 if (p == NULL && np > 0)
248 p = LIST_FIRST(&zombproc);
249 }
250 }
251
252 static void
253 dumpthread(volatile struct proc *p, volatile struct thread *td, int all)
254 {
255 char state[9], wprefix;
256 const char *wmesg;
257 void *wchan;
258
259 if (all) {
260 db_printf("%6d ", td->td_tid);
261 switch (td->td_state) {
262 case TDS_RUNNING:
263 snprintf(state, sizeof(state), "Run");
264 break;
265 case TDS_RUNQ:
266 snprintf(state, sizeof(state), "RunQ");
267 break;
268 case TDS_CAN_RUN:
269 snprintf(state, sizeof(state), "CanRun");
270 break;
271 case TDS_INACTIVE:
272 snprintf(state, sizeof(state), "Inactv");
273 break;
274 case TDS_INHIBITED:
275 state[0] = '\0';
276 if (TD_ON_LOCK(td))
277 strlcat(state, "L", sizeof(state));
278 if (TD_IS_SLEEPING(td)) {
279 if (td->td_flags & TDF_SINTR)
280 strlcat(state, "S", sizeof(state));
281 else
282 strlcat(state, "D", sizeof(state));
283 }
284 if (TD_IS_SWAPPED(td))
285 strlcat(state, "W", sizeof(state));
286 if (TD_AWAITING_INTR(td))
287 strlcat(state, "I", sizeof(state));
288 if (TD_IS_SUSPENDED(td))
289 strlcat(state, "s", sizeof(state));
290 if (state[0] != '\0')
291 break;
292 default:
293 snprintf(state, sizeof(state), "???");
294 }
295 db_printf(" %-6.6s ", state);
296 }
297 wprefix = ' ';
298 if (TD_ON_LOCK(td)) {
299 wprefix = '*';
300 wmesg = td->td_lockname;
301 wchan = td->td_blocked;
302 } else if (TD_ON_SLEEPQ(td)) {
303 wmesg = td->td_wmesg;
304 wchan = td->td_wchan;
305 } else if (TD_IS_RUNNING(td)) {
306 snprintf(state, sizeof(state), "CPU %d", td->td_oncpu);
307 wmesg = state;
308 wchan = NULL;
309 } else {
310 wmesg = "";
311 wchan = NULL;
312 }
313 db_printf("%c%-7.7s ", wprefix, wmesg);
314 if (wchan == NULL)
315 #ifdef __LP64__
316 db_printf("%18s ", "");
317 #else
318 db_printf("%10s ", "");
319 #endif
320 else
321 db_printf("%p ", wchan);
322 if (p->p_flag & P_SYSTEM)
323 db_printf("[");
324 if (td->td_name[0] != '\0')
325 db_printf("%s", td->td_name);
326 else
327 db_printf("%s", td->td_proc->p_comm);
328 if (p->p_flag & P_SYSTEM)
329 db_printf("]");
330 if (ps_mode == PRINT_ARGS && all == 0) {
331 db_printf(" ");
332 dump_args(p);
333 }
334 db_printf("\n");
335 }
336
337 DB_SHOW_COMMAND(thread, db_show_thread)
338 {
339 struct thread *td;
340 struct lock_object *lock;
341 bool comma;
342 int delta;
343
344 /* Determine which thread to examine. */
345 if (have_addr)
346 td = db_lookup_thread(addr, false);
347 else
348 td = kdb_thread;
349 lock = (struct lock_object *)td->td_lock;
350
351 db_printf("Thread %d at %p:\n", td->td_tid, td);
352 db_printf(" proc (pid %d): %p\n", td->td_proc->p_pid, td->td_proc);
353 if (td->td_name[0] != '\0')
354 db_printf(" name: %s\n", td->td_name);
355 db_printf(" stack: %p-%p\n", (void *)td->td_kstack,
356 (void *)(td->td_kstack + td->td_kstack_pages * PAGE_SIZE - 1));
357 db_printf(" flags: %#x ", td->td_flags);
358 db_printf(" pflags: %#x\n", td->td_pflags);
359 db_printf(" state: ");
360 switch (td->td_state) {
361 case TDS_INACTIVE:
362 db_printf("INACTIVE\n");
363 break;
364 case TDS_CAN_RUN:
365 db_printf("CAN RUN\n");
366 break;
367 case TDS_RUNQ:
368 db_printf("RUNQ\n");
369 break;
370 case TDS_RUNNING:
371 db_printf("RUNNING (CPU %d)\n", td->td_oncpu);
372 break;
373 case TDS_INHIBITED:
374 db_printf("INHIBITED: {");
375 comma = false;
376 if (TD_IS_SLEEPING(td)) {
377 db_printf("SLEEPING");
378 comma = true;
379 }
380 if (TD_IS_SUSPENDED(td)) {
381 if (comma)
382 db_printf(", ");
383 db_printf("SUSPENDED");
384 comma = true;
385 }
386 if (TD_IS_SWAPPED(td)) {
387 if (comma)
388 db_printf(", ");
389 db_printf("SWAPPED");
390 comma = true;
391 }
392 if (TD_ON_LOCK(td)) {
393 if (comma)
394 db_printf(", ");
395 db_printf("LOCK");
396 comma = true;
397 }
398 if (TD_AWAITING_INTR(td)) {
399 if (comma)
400 db_printf(", ");
401 db_printf("IWAIT");
402 }
403 db_printf("}\n");
404 break;
405 default:
406 db_printf("??? (%#x)\n", td->td_state);
407 break;
408 }
409 if (TD_ON_LOCK(td))
410 db_printf(" lock: %s turnstile: %p\n", td->td_lockname,
411 td->td_blocked);
412 if (TD_ON_SLEEPQ(td))
413 db_printf(
414 " wmesg: %s wchan: %p sleeptimo %lx. %jx (curr %lx. %jx)\n",
415 td->td_wmesg, td->td_wchan,
416 (long)sbttobt(td->td_sleeptimo).sec,
417 (uintmax_t)sbttobt(td->td_sleeptimo).frac,
418 (long)sbttobt(sbinuptime()).sec,
419 (uintmax_t)sbttobt(sbinuptime()).frac);
420 db_printf(" priority: %d\n", td->td_priority);
421 db_printf(" container lock: %s (%p)\n", lock->lo_name, lock);
422 if (td->td_swvoltick != 0) {
423 delta = (u_int)ticks - (u_int)td->td_swvoltick;
424 db_printf(" last voluntary switch: %d ms ago\n",
425 1000 * delta / hz);
426 }
427 if (td->td_swinvoltick != 0) {
428 delta = (u_int)ticks - (u_int)td->td_swinvoltick;
429 db_printf(" last involuntary switch: %d ms ago\n",
430 1000 * delta / hz);
431 }
432 }
433
434 DB_SHOW_COMMAND(proc, db_show_proc)
435 {
436 struct thread *td;
437 struct proc *p;
438 int i;
439
440 /* Determine which process to examine. */
441 if (have_addr)
442 p = db_lookup_proc(addr);
443 else
444 p = kdb_thread->td_proc;
445
446 db_printf("Process %d (%s) at %p:\n", p->p_pid, p->p_comm, p);
447 db_printf(" state: ");
448 switch (p->p_state) {
449 case PRS_NEW:
450 db_printf("NEW\n");
451 break;
452 case PRS_NORMAL:
453 db_printf("NORMAL\n");
454 break;
455 case PRS_ZOMBIE:
456 db_printf("ZOMBIE\n");
457 break;
458 default:
459 db_printf("??? (%#x)\n", p->p_state);
460 }
461 if (p->p_ucred != NULL) {
462 db_printf(" uid: %d gids: ", p->p_ucred->cr_uid);
463 for (i = 0; i < p->p_ucred->cr_ngroups; i++) {
464 db_printf("%d", p->p_ucred->cr_groups[i]);
465 if (i < (p->p_ucred->cr_ngroups - 1))
466 db_printf(", ");
467 }
468 db_printf("\n");
469 }
470 if (p->p_pptr != NULL)
471 db_printf(" parent: pid %d at %p\n", p->p_pptr->p_pid,
472 p->p_pptr);
473 if (p->p_leader != NULL && p->p_leader != p)
474 db_printf(" leader: pid %d at %p\n", p->p_leader->p_pid,
475 p->p_leader);
476 if (p->p_sysent != NULL)
477 db_printf(" ABI: %s\n", p->p_sysent->sv_name);
478 if (p->p_args != NULL) {
479 db_printf(" arguments: ");
480 dump_args(p);
481 db_printf("\n");
482 }
483 db_printf(" repear: %p reapsubtree: %d\n",
484 p->p_reaper, p->p_reapsubtree);
485 db_printf(" sigparent: %d\n", p->p_sigparent);
486 db_printf(" vmspace: %p\n", p->p_vmspace);
487 db_printf(" (map %p)\n",
488 (p->p_vmspace != NULL) ? &p->p_vmspace->vm_map : 0);
489 db_printf(" (map.pmap %p)\n",
490 (p->p_vmspace != NULL) ? &p->p_vmspace->vm_map.pmap : 0);
491 db_printf(" (pmap %p)\n",
492 (p->p_vmspace != NULL) ? &p->p_vmspace->vm_pmap : 0);
493 db_printf(" threads: %d\n", p->p_numthreads);
494 FOREACH_THREAD_IN_PROC(p, td) {
495 dumpthread(p, td, 1);
496 if (db_pager_quit)
497 break;
498 }
499 }
500
501 void
502 db_findstack_cmd(db_expr_t addr, bool have_addr, db_expr_t dummy3 __unused,
503 char *dummy4 __unused)
504 {
505 struct proc *p;
506 struct thread *td;
507 struct kstack_cache_entry *ks_ce;
508 vm_offset_t saddr;
509
510 if (have_addr)
511 saddr = addr;
512 else {
513 db_printf("Usage: findstack <address>\n");
514 return;
515 }
516
517 FOREACH_PROC_IN_SYSTEM(p) {
518 FOREACH_THREAD_IN_PROC(p, td) {
519 if (td->td_kstack <= saddr && saddr < td->td_kstack +
520 PAGE_SIZE * td->td_kstack_pages) {
521 db_printf("Thread %p\n", td);
522 return;
523 }
524 }
525 }
526
527 for (ks_ce = kstack_cache; ks_ce != NULL;
528 ks_ce = ks_ce->next_ks_entry) {
529 if ((vm_offset_t)ks_ce <= saddr && saddr < (vm_offset_t)ks_ce +
530 PAGE_SIZE * kstack_pages) {
531 db_printf("Cached stack %p\n", ks_ce);
532 return;
533 }
534 }
535 }
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