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/proc.h>
  38 #include <sys/sysent.h>
  39 #include <sys/systm.h>
  40 #include <vm/vm.h>
  41 #include <vm/vm_param.h>
  42 #include <vm/pmap.h>
  43
  44 #include <ddb/ddb.h>
  45
  46 static void     dumpthread(volatile struct proc *p, volatile struct thread *td,
  47                     int all);
  48 /*
  49  * At least one non-optional show-command must be implemented using
  50  * DB_SHOW_ALL_COMMAND() so that db_show_all_cmd_set gets created.
  51  * Here is one.
  52  */
  53 DB_SHOW_ALL_COMMAND(procs, db_procs_cmd)
  54 {
  55         db_ps(addr, have_addr, count, modif);
  56 }
  57
  58 /*
  59  * Layout:
  60  * - column counts
  61  * - header
  62  * - single-threaded process
  63  * - multi-threaded process
  64  * - thread in a MT process
  65  *
  66  *          1         2         3         4         5         6         7
  67  * 1234567890123456789012345678901234567890123456789012345678901234567890
  68  *   pid  ppid  pgrp   uid   state   wmesg     wchan    cmd
  69  * <pid> <ppi> <pgi> <uid>  <stat> < wmesg > < wchan  > <name>
  70  * <pid> <ppi> <pgi> <uid>  <stat>  (threaded)          <command>
  71  * <tid >                   <stat> < wmesg > < wchan  > <name>
  72  *
  73  * For machines with 64-bit pointers, we expand the wchan field 8 more
  74  * characters.
  75  */
  76 void
  77 db_ps(db_expr_t addr, boolean_t hasaddr, db_expr_t count, char *modif)
  78 {
  79         volatile struct proc *p, *pp;
  80         volatile struct thread *td;
  81         struct ucred *cred;
  82         struct pgrp *pgrp;
  83         char state[9];
  84         int np, rflag, sflag, dflag, lflag, wflag;
  85
  86         np = nprocs;
  87
  88         if (!LIST_EMPTY(&allproc))
  89                 p = LIST_FIRST(&allproc);
  90         else
  91                 p = &proc0;
  92
  93 #ifdef __LP64__
  94         db_printf("  pid  ppid  pgrp   uid   state   wmesg         wchan        cmd\n");
  95 #else
  96         db_printf("  pid  ppid  pgrp   uid   state   wmesg     wchan    cmd\n");
  97 #endif
  98         while (--np >= 0 && !db_pager_quit) {
  99                 if (p == NULL) {
 100                         db_printf("oops, ran out of processes early!\n");
 101                         break;
 102                 }
 103                 pp = p->p_pptr;
 104                 if (pp == NULL)
 105                         pp = p;
 106
 107                 cred = p->p_ucred;
 108                 pgrp = p->p_pgrp;
 109                 db_printf("%5d %5d %5d %5d ", p->p_pid, pp->p_pid,
 110                     pgrp != NULL ? pgrp->pg_id : 0,
 111                     cred != NULL ? cred->cr_ruid : 0);
 112
 113                 /* Determine our primary process state. */
 114                 switch (p->p_state) {
 115                 case PRS_NORMAL:
 116                         if (P_SHOULDSTOP(p))
 117                                 state[0] = 'T';
 118                         else {
 119                                 /*
 120                                  * One of D, L, R, S, W.  For a
 121                                  * multithreaded process we will use
 122                                  * the state of the thread with the
 123                                  * highest precedence.  The
 124                                  * precendence order from high to low
 125                                  * is R, L, D, S, W.  If no thread is
 126                                  * in a sane state we use '?' for our
 127                                  * primary state.
 128                                  */
 129                                 rflag = sflag = dflag = lflag = wflag = 0;
 130                                 FOREACH_THREAD_IN_PROC(p, td) {
 131                                         if (td->td_state == TDS_RUNNING ||
 132                                             td->td_state == TDS_RUNQ ||
 133                                             td->td_state == TDS_CAN_RUN)
 134                                                 rflag++;
 135                                         if (TD_ON_LOCK(td))
 136                                                 lflag++;
 137                                         if (TD_IS_SLEEPING(td)) {
 138                                                 if (!(td->td_flags & TDF_SINTR))
 139                                                         dflag++;
 140                                                 else
 141                                                         sflag++;
 142                                         }
 143                                         if (TD_AWAITING_INTR(td))
 144                                                 wflag++;
 145                                 }
 146                                 if (rflag)
 147                                         state[0] = 'R';
 148                                 else if (lflag)
 149                                         state[0] = 'L';
 150                                 else if (dflag)
 151                                         state[0] = 'D';
 152                                 else if (sflag)
 153                                         state[0] = 'S';
 154                                 else if (wflag)
 155                                         state[0] = 'W';
 156                                 else
 157                                         state[0] = '?';
 158                         }
 159                         break;
 160                 case PRS_NEW:
 161                         state[0] = 'N';
 162                         break;
 163                 case PRS_ZOMBIE:
 164                         state[0] = 'Z';
 165                         break;
 166                 default:
 167                         state[0] = 'U';
 168                         break;
 169                 }
 170                 state[1] = '\0';
 171
 172                 /* Additional process state flags. */
 173                 if (!(p->p_flag & P_INMEM))
 174                         strlcat(state, "W", sizeof(state));
 175                 if (p->p_flag & P_TRACED)
 176                         strlcat(state, "X", sizeof(state));
 177                 if (p->p_flag & P_WEXIT && p->p_state != PRS_ZOMBIE)
 178                         strlcat(state, "E", sizeof(state));
 179                 if (p->p_flag & P_PPWAIT)
 180                         strlcat(state, "V", sizeof(state));
 181                 if (p->p_flag & P_SYSTEM || p->p_lock > 0)
 182                         strlcat(state, "L", sizeof(state));
 183                 if (p->p_session != NULL && SESS_LEADER(p))
 184                         strlcat(state, "s", sizeof(state));
 185                 /* Cheated here and didn't compare pgid's. */
 186                 if (p->p_flag & P_CONTROLT)
 187                         strlcat(state, "+", sizeof(state));
 188                 if (cred != NULL && jailed(cred))
 189                         strlcat(state, "J", sizeof(state));
 190                 db_printf(" %-6.6s ", state);
 191                 if (p->p_flag & P_HADTHREADS) {
 192 #ifdef __LP64__
 193                         db_printf(" (threaded)                  ");
 194 #else
 195                         db_printf(" (threaded)          ");
 196 #endif
 197                         if (p->p_flag & P_SYSTEM)
 198                                 db_printf("[");
 199                         db_printf("%s", p->p_comm);
 200                         if (p->p_flag & P_SYSTEM)
 201                                 db_printf("]");
 202                         db_printf("\n");
 203                 }
 204                 FOREACH_THREAD_IN_PROC(p, td) {
 205                         dumpthread(p, td, p->p_flag & P_HADTHREADS);
 206                         if (db_pager_quit)
 207                                 break;
 208                 }
 209
 210                 p = LIST_NEXT(p, p_list);
 211                 if (p == NULL && np > 0)
 212                         p = LIST_FIRST(&zombproc);
 213         }
 214 }
 215
 216 static void
 217 dumpthread(volatile struct proc *p, volatile struct thread *td, int all)
 218 {
 219         char state[9], wprefix;
 220         const char *wmesg;
 221         void *wchan;
 222
 223         if (all) {
 224                 db_printf("%6d                  ", td->td_tid);
 225                 switch (td->td_state) {
 226                 case TDS_RUNNING:
 227                         snprintf(state, sizeof(state), "Run");
 228                         break;
 229                 case TDS_RUNQ:
 230                         snprintf(state, sizeof(state), "RunQ");
 231                         break;
 232                 case TDS_CAN_RUN:
 233                         snprintf(state, sizeof(state), "CanRun");
 234                         break;
 235                 case TDS_INACTIVE:
 236                         snprintf(state, sizeof(state), "Inactv");
 237                         break;
 238                 case TDS_INHIBITED:
 239                         state[0] = '\0';
 240                         if (TD_ON_LOCK(td))
 241                                 strlcat(state, "L", sizeof(state));
 242                         if (TD_IS_SLEEPING(td)) {
 243                                 if (td->td_flags & TDF_SINTR)
 244                                         strlcat(state, "S", sizeof(state));
 245                                 else
 246                                         strlcat(state, "D", sizeof(state));
 247                         }
 248                         if (TD_IS_SWAPPED(td))
 249                                 strlcat(state, "W", sizeof(state));
 250                         if (TD_AWAITING_INTR(td))
 251                                 strlcat(state, "I", sizeof(state));
 252                         if (TD_IS_SUSPENDED(td))
 253                                 strlcat(state, "s", sizeof(state));
 254                         if (state[0] != '\0')
 255                                 break;
 256                 default:
 257                         snprintf(state, sizeof(state), "???");
 258                 }
 259                 db_printf(" %-6.6s ", state);
 260         }
 261         wprefix = ' ';
 262         if (TD_ON_LOCK(td)) {
 263                 wprefix = '*';
 264                 wmesg = td->td_lockname;
 265                 wchan = td->td_blocked;
 266         } else if (TD_ON_SLEEPQ(td)) {
 267                 wmesg = td->td_wmesg;
 268                 wchan = td->td_wchan;
 269         } else if (TD_IS_RUNNING(td)) {
 270                 snprintf(state, sizeof(state), "CPU %d", td->td_oncpu);
 271                 wmesg = state;
 272                 wchan = NULL;
 273         } else {
 274                 wmesg = "";
 275                 wchan = NULL;
 276         }
 277         db_printf("%c%-8.8s ", wprefix, wmesg);
 278         if (wchan == NULL)
 279 #ifdef __LP64__
 280                 db_printf("%18s ", "");
 281 #else
 282                 db_printf("%10s ", "");
 283 #endif
 284         else
 285                 db_printf("%p ", wchan);
 286         if (p->p_flag & P_SYSTEM)
 287                 db_printf("[");
 288         if (td->td_name[0] != '\0')
 289                 db_printf("%s", td->td_name);
 290         else
 291                 db_printf("%s", td->td_proc->p_comm);
 292         if (p->p_flag & P_SYSTEM)
 293                 db_printf("]");
 294         db_printf("\n");
 295 }
 296
 297 DB_SHOW_COMMAND(thread, db_show_thread)
 298 {
 299         struct thread *td;
 300         struct lock_object *lock;
 301         boolean_t comma;
 302
 303         /* Determine which thread to examine. */
 304         if (have_addr)
 305                 td = db_lookup_thread(addr, FALSE);
 306         else
 307                 td = kdb_thread;
 308         lock = (struct lock_object *)td->td_lock;
 309
 310         db_printf("Thread %d at %p:\n", td->td_tid, td);
 311         db_printf(" proc (pid %d): %p\n", td->td_proc->p_pid, td->td_proc);
 312         if (td->td_name[0] != '\0')
 313                 db_printf(" name: %s\n", td->td_name);
 314         db_printf(" stack: %p-%p\n", (void *)td->td_kstack,
 315             (void *)(td->td_kstack + td->td_kstack_pages * PAGE_SIZE - 1));
 316         db_printf(" flags: %#x ", td->td_flags);
 317         db_printf(" pflags: %#x\n", td->td_pflags);
 318         db_printf(" state: ");
 319         switch (td->td_state) {
 320         case TDS_INACTIVE:
 321                 db_printf("INACTIVE\n");
 322                 break;
 323         case TDS_CAN_RUN:
 324                 db_printf("CAN RUN\n");
 325                 break;
 326         case TDS_RUNQ:
 327                 db_printf("RUNQ\n");
 328                 break;
 329         case TDS_RUNNING:
 330                 db_printf("RUNNING (CPU %d)\n", td->td_oncpu);
 331                 break;
 332         case TDS_INHIBITED:
 333                 db_printf("INHIBITED: {");
 334                 comma = FALSE;
 335                 if (TD_IS_SLEEPING(td)) {
 336                         db_printf("SLEEPING");
 337                         comma = TRUE;
 338                 }
 339                 if (TD_IS_SUSPENDED(td)) {
 340                         if (comma)
 341                                 db_printf(", ");
 342                         db_printf("SUSPENDED");
 343                         comma = TRUE;
 344                 }
 345                 if (TD_IS_SWAPPED(td)) {
 346                         if (comma)
 347                                 db_printf(", ");
 348                         db_printf("SWAPPED");
 349                         comma = TRUE;
 350                 }
 351                 if (TD_ON_LOCK(td)) {
 352                         if (comma)
 353                                 db_printf(", ");
 354                         db_printf("LOCK");
 355                         comma = TRUE;
 356                 }
 357                 if (TD_AWAITING_INTR(td)) {
 358                         if (comma)
 359                                 db_printf(", ");
 360                         db_printf("IWAIT");
 361                 }
 362                 db_printf("}\n");
 363                 break;
 364         default:
 365                 db_printf("??? (%#x)\n", td->td_state);
 366                 break;
 367         }
 368         if (TD_ON_LOCK(td))
 369                 db_printf(" lock: %s  turnstile: %p\n", td->td_lockname,
 370                     td->td_blocked);
 371         if (TD_ON_SLEEPQ(td))
 372                 db_printf(" wmesg: %s  wchan: %p\n", td->td_wmesg,
 373                     td->td_wchan);
 374         db_printf(" priority: %d\n", td->td_priority);
 375         db_printf(" container lock: %s (%p)\n", lock->lo_name, lock);
 376 }
 377
 378 DB_SHOW_COMMAND(proc, db_show_proc)
 379 {
 380         struct thread *td;
 381         struct proc *p;
 382         int i;
 383
 384         /* Determine which process to examine. */
 385         if (have_addr)
 386                 p = db_lookup_proc(addr);
 387         else
 388                 p = kdb_thread->td_proc;
 389
 390         db_printf("Process %d (%s) at %p:\n", p->p_pid, p->p_comm, p);
 391         db_printf(" state: ");
 392         switch (p->p_state) {
 393         case PRS_NEW:
 394                 db_printf("NEW\n");
 395                 break;
 396         case PRS_NORMAL:
 397                 db_printf("NORMAL\n");
 398                 break;
 399         case PRS_ZOMBIE:
 400                 db_printf("ZOMBIE\n");
 401                 break;
 402         default:
 403                 db_printf("??? (%#x)\n", p->p_state);
 404         }
 405         if (p->p_ucred != NULL) {
 406                 db_printf(" uid: %d  gids: ", p->p_ucred->cr_uid);
 407                 for (i = 0; i < p->p_ucred->cr_ngroups; i++) {
 408                         db_printf("%d", p->p_ucred->cr_groups[i]);
 409                         if (i < (p->p_ucred->cr_ngroups - 1))
 410                                 db_printf(", ");
 411                 }
 412                 db_printf("\n");
 413         }
 414         if (p->p_pptr != NULL)
 415                 db_printf(" parent: pid %d at %p\n", p->p_pptr->p_pid,
 416                     p->p_pptr);
 417         if (p->p_leader != NULL && p->p_leader != p)
 418                 db_printf(" leader: pid %d at %p\n", p->p_leader->p_pid,
 419                     p->p_leader);
 420         if (p->p_sysent != NULL)
 421                 db_printf(" ABI: %s\n", p->p_sysent->sv_name);
 422         if (p->p_args != NULL)
 423                 db_printf(" arguments: %.*s\n", (int)p->p_args->ar_length,
 424                     p->p_args->ar_args);
 425         db_printf(" threads: %d\n", p->p_numthreads);
 426         FOREACH_THREAD_IN_PROC(p, td) {
 427                 dumpthread(p, td, 1);
 428                 if (db_pager_quit)
 429                         break;
 430         }
 431 }