FreeBSD/Linux Kernel Cross Reference
sys/ddb/db_ps.c
1 /*-
2 * Copyright (c) 1993 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32
33 #include <sys/param.h>
34 #include <sys/cons.h>
35 #include <sys/jail.h>
36 #include <sys/kdb.h>
37 #include <sys/linker_set.h>
38 #include <sys/proc.h>
39 #include <sys/sysent.h>
40 #include <sys/systm.h>
41 #include <vm/vm.h>
42 #include <vm/vm_param.h>
43 #include <vm/pmap.h>
44
45 #include <ddb/ddb.h>
46
47 static void dumpthread(volatile struct proc *p, volatile struct thread *td,
48 int all);
49
50 /*
51 * Layout:
52 * - column counts
53 * - header
54 * - single-threaded process
55 * - multi-threaded process
56 * - thread in a MT process
57 *
58 * 1 2 3 4 5 6 7
59 * 1234567890123456789012345678901234567890123456789012345678901234567890
60 * pid ppid pgrp uid state wmesg wchan cmd
61 * <pid> <ppi> <pgi> <uid> <stat> < wmesg > < wchan > <name>
62 * <pid> <ppi> <pgi> <uid> <stat> (threaded) <command>
63 * <tid > <stat> < wmesg > < wchan > <name>
64 *
65 * For machines with 64-bit pointers, we expand the wchan field 8 more
66 * characters.
67 */
68 void
69 db_ps(db_expr_t addr, boolean_t hasaddr, db_expr_t count, char *modif)
70 {
71 volatile struct proc *p, *pp;
72 volatile struct thread *td;
73 struct ucred *cred;
74 struct pgrp *pgrp;
75 char state[9];
76 int np, rflag, sflag, dflag, lflag, wflag;
77
78 np = nprocs;
79
80 if (!LIST_EMPTY(&allproc))
81 p = LIST_FIRST(&allproc);
82 else
83 p = &proc0;
84
85 #ifdef __LP64__
86 db_printf(" pid ppid pgrp uid state wmesg wchan cmd\n");
87 #else
88 db_printf(" pid ppid pgrp uid state wmesg wchan cmd\n");
89 #endif
90 while (--np >= 0 && !db_pager_quit) {
91 if (p == NULL) {
92 db_printf("oops, ran out of processes early!\n");
93 break;
94 }
95 pp = p->p_pptr;
96 if (pp == NULL)
97 pp = p;
98
99 cred = p->p_ucred;
100 pgrp = p->p_pgrp;
101 db_printf("%5d %5d %5d %5d ", p->p_pid, pp->p_pid,
102 pgrp != NULL ? pgrp->pg_id : 0,
103 cred != NULL ? cred->cr_ruid : 0);
104
105 /* Determine our primary process state. */
106 switch (p->p_state) {
107 case PRS_NORMAL:
108 if (P_SHOULDSTOP(p))
109 state[0] = 'T';
110 else {
111 /*
112 * One of D, L, R, S, W. For a
113 * multithreaded process we will use
114 * the state of the thread with the
115 * highest precedence. The
116 * precendence order from high to low
117 * is R, L, D, S, W. If no thread is
118 * in a sane state we use '?' for our
119 * primary state.
120 */
121 rflag = sflag = dflag = lflag = wflag = 0;
122 FOREACH_THREAD_IN_PROC(p, td) {
123 if (td->td_state == TDS_RUNNING ||
124 td->td_state == TDS_RUNQ ||
125 td->td_state == TDS_CAN_RUN)
126 rflag++;
127 if (TD_ON_LOCK(td))
128 lflag++;
129 if (TD_IS_SLEEPING(td)) {
130 if (!td->td_flags & TDF_SINTR)
131 dflag++;
132 else
133 sflag++;
134 }
135 if (TD_AWAITING_INTR(td))
136 wflag++;
137 }
138 if (rflag)
139 state[0] = 'R';
140 else if (lflag)
141 state[0] = 'L';
142 else if (dflag)
143 state[0] = 'D';
144 else if (sflag)
145 state[0] = 'S';
146 else if (wflag)
147 state[0] = 'W';
148 else
149 state[0] = '?';
150 }
151 break;
152 case PRS_NEW:
153 state[0] = 'N';
154 break;
155 case PRS_ZOMBIE:
156 state[0] = 'Z';
157 break;
158 default:
159 state[0] = 'U';
160 break;
161 }
162 state[1] = '\0';
163
164 /* Additional process state flags. */
165 if (!p->p_flag & P_INMEM)
166 strlcat(state, "W", sizeof(state));
167 if (p->p_flag & P_TRACED)
168 strlcat(state, "X", sizeof(state));
169 if (p->p_flag & P_WEXIT && p->p_state != PRS_ZOMBIE)
170 strlcat(state, "E", sizeof(state));
171 if (p->p_flag & P_PPWAIT)
172 strlcat(state, "V", sizeof(state));
173 if (p->p_flag & P_SYSTEM || p->p_lock > 0)
174 strlcat(state, "L", sizeof(state));
175 if (p->p_session != NULL && SESS_LEADER(p))
176 strlcat(state, "s", sizeof(state));
177 /* Cheated here and didn't compare pgid's. */
178 if (p->p_flag & P_CONTROLT)
179 strlcat(state, "+", sizeof(state));
180 if (cred != NULL && jailed(cred))
181 strlcat(state, "J", sizeof(state));
182 db_printf(" %-6.6s ", state);
183 if (p->p_flag & P_HADTHREADS)
184 #ifdef __LP64__
185 db_printf(" (threaded) %s\n",
186 p->p_comm);
187 #else
188 db_printf(" (threaded) %s\n", p->p_comm);
189 #endif
190 FOREACH_THREAD_IN_PROC(p, td) {
191 dumpthread(p, td, p->p_flag & P_HADTHREADS);
192 if (db_pager_quit)
193 break;
194 }
195
196 p = LIST_NEXT(p, p_list);
197 if (p == NULL && np > 0)
198 p = LIST_FIRST(&zombproc);
199 }
200 }
201
202 static void
203 dumpthread(volatile struct proc *p, volatile struct thread *td, int all)
204 {
205 char state[9], wprefix;
206 const char *wmesg;
207 void *wchan;
208
209 if (all) {
210 db_printf("%6d ", td->td_tid);
211 switch (td->td_state) {
212 case TDS_RUNNING:
213 snprintf(state, sizeof(state), "Run");
214 break;
215 case TDS_RUNQ:
216 snprintf(state, sizeof(state), "RunQ");
217 break;
218 case TDS_CAN_RUN:
219 snprintf(state, sizeof(state), "CanRun");
220 break;
221 case TDS_INACTIVE:
222 snprintf(state, sizeof(state), "Inactv");
223 break;
224 case TDS_INHIBITED:
225 state[0] = '\0';
226 if (TD_ON_LOCK(td))
227 strlcat(state, "L", sizeof(state));
228 if (TD_IS_SLEEPING(td)) {
229 if (td->td_flags & TDF_SINTR)
230 strlcat(state, "S", sizeof(state));
231 else
232 strlcat(state, "D", sizeof(state));
233 }
234 if (TD_IS_SWAPPED(td))
235 strlcat(state, "W", sizeof(state));
236 if (TD_AWAITING_INTR(td))
237 strlcat(state, "I", sizeof(state));
238 if (TD_IS_SUSPENDED(td))
239 strlcat(state, "s", sizeof(state));
240 if (state[0] != '\0')
241 break;
242 default:
243 snprintf(state, sizeof(state), "???");
244 }
245 db_printf(" %-6.6s ", state);
246 }
247 wprefix = ' ';
248 if (TD_ON_LOCK(td)) {
249 wprefix = '*';
250 wmesg = td->td_lockname;
251 wchan = td->td_blocked;
252 } else if (TD_ON_SLEEPQ(td)) {
253 wmesg = td->td_wmesg;
254 wchan = td->td_wchan;
255 } else if (TD_IS_RUNNING(td)) {
256 snprintf(state, sizeof(state), "CPU %d", td->td_oncpu);
257 wmesg = state;
258 wchan = NULL;
259 } else {
260 wmesg = "";
261 wchan = NULL;
262 }
263 db_printf("%c%-8.8s ", wprefix, wmesg);
264 if (wchan == NULL)
265 #ifdef __LP64__
266 db_printf("%18s ", "");
267 #else
268 db_printf("%10s ", "");
269 #endif
270 else
271 db_printf("%p ", wchan);
272 if (p->p_flag & P_SYSTEM)
273 db_printf("[");
274 if (td->td_name[0] != '\0')
275 db_printf("%s", td->td_name);
276 else
277 db_printf("%s", td->td_proc->p_comm);
278 if (p->p_flag & P_SYSTEM)
279 db_printf("]");
280 db_printf("\n");
281 }
282
283 DB_SHOW_COMMAND(thread, db_show_thread)
284 {
285 struct thread *td;
286 boolean_t comma;
287
288 /* Determine which thread to examine. */
289 if (have_addr)
290 td = db_lookup_thread(addr, FALSE);
291 else
292 td = kdb_thread;
293
294 db_printf("Thread %d at %p:\n", td->td_tid, td);
295 db_printf(" proc (pid %d): %p\n", td->td_proc->p_pid, td->td_proc);
296 if (td->td_name[0] != '\0')
297 db_printf(" name: %s\n", td->td_name);
298 db_printf(" flags: %#x ", td->td_flags);
299 db_printf(" pflags: %#x\n", td->td_pflags);
300 db_printf(" state: ");
301 switch (td->td_state) {
302 case TDS_INACTIVE:
303 db_printf("INACTIVE\n");
304 break;
305 case TDS_CAN_RUN:
306 db_printf("CAN RUN\n");
307 break;
308 case TDS_RUNQ:
309 db_printf("RUNQ\n");
310 break;
311 case TDS_RUNNING:
312 db_printf("RUNNING (CPU %d)\n", td->td_oncpu);
313 break;
314 case TDS_INHIBITED:
315 db_printf("INHIBITED: {");
316 comma = FALSE;
317 if (TD_IS_SLEEPING(td)) {
318 db_printf("SLEEPING");
319 comma = TRUE;
320 }
321 if (TD_IS_SUSPENDED(td)) {
322 if (comma)
323 db_printf(", ");
324 db_printf("SUSPENDED");
325 comma = TRUE;
326 }
327 if (TD_IS_SWAPPED(td)) {
328 if (comma)
329 db_printf(", ");
330 db_printf("SWAPPED");
331 comma = TRUE;
332 }
333 if (TD_ON_LOCK(td)) {
334 if (comma)
335 db_printf(", ");
336 db_printf("LOCK");
337 comma = TRUE;
338 }
339 if (TD_AWAITING_INTR(td)) {
340 if (comma)
341 db_printf(", ");
342 db_printf("IWAIT");
343 }
344 db_printf("}\n");
345 break;
346 default:
347 db_printf("??? (%#x)\n", td->td_state);
348 break;
349 }
350 if (TD_ON_LOCK(td))
351 db_printf(" lock: %s turnstile: %p\n", td->td_lockname,
352 td->td_blocked);
353 if (TD_ON_SLEEPQ(td))
354 db_printf(" wmesg: %s wchan: %p\n", td->td_wmesg,
355 td->td_wchan);
356 db_printf(" priority: %d\n", td->td_priority);
357 }
358
359 DB_SHOW_COMMAND(proc, db_show_proc)
360 {
361 struct thread *td;
362 struct proc *p;
363 int i;
364
365 /* Determine which process to examine. */
366 if (have_addr)
367 p = db_lookup_proc(addr);
368 else
369 p = kdb_thread->td_proc;
370
371 db_printf("Process %d (%s) at %p:\n", p->p_pid, p->p_comm, p);
372 db_printf(" state: ");
373 switch (p->p_state) {
374 case PRS_NEW:
375 db_printf("NEW\n");
376 break;
377 case PRS_NORMAL:
378 db_printf("NORMAL\n");
379 break;
380 case PRS_ZOMBIE:
381 db_printf("ZOMBIE\n");
382 break;
383 default:
384 db_printf("??? (%#x)\n", p->p_state);
385 }
386 if (p->p_ucred != NULL) {
387 db_printf(" uid: %d gids: ", p->p_ucred->cr_uid);
388 for (i = 0; i < p->p_ucred->cr_ngroups; i++) {
389 db_printf("%d", p->p_ucred->cr_groups[i]);
390 if (i < (p->p_ucred->cr_ngroups - 1))
391 db_printf(", ");
392 }
393 db_printf("\n");
394 }
395 if (p->p_pptr != NULL)
396 db_printf(" parent: pid %d at %p\n", p->p_pptr->p_pid,
397 p->p_pptr);
398 if (p->p_leader != NULL && p->p_leader != p)
399 db_printf(" leader: pid %d at %p\n", p->p_leader->p_pid,
400 p->p_leader);
401 if (p->p_sysent != NULL)
402 db_printf(" ABI: %s\n", p->p_sysent->sv_name);
403 if (p->p_args != NULL)
404 db_printf(" arguments: %.*s\n", (int)p->p_args->ar_length,
405 p->p_args->ar_args);
406 db_printf(" threads: %d\n", p->p_numthreads);
407 FOREACH_THREAD_IN_PROC(p, td) {
408 dumpthread(p, td, 1);
409 if (db_pager_quit)
410 break;
411 }
412 }
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