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)                  %s\n",
 194                             p->p_comm);
 195 #else
 196                         db_printf(" (threaded)          %s\n", p->p_comm);
 197 #endif
 198                 FOREACH_THREAD_IN_PROC(p, td) {
 199                         dumpthread(p, td, p->p_flag & P_HADTHREADS);
 200                         if (db_pager_quit)
 201                                 break;
 202                 }
 203
 204                 p = LIST_NEXT(p, p_list);
 205                 if (p == NULL && np > 0)
 206                         p = LIST_FIRST(&zombproc);
 207         }
 208 }
 209
 210 static void
 211 dumpthread(volatile struct proc *p, volatile struct thread *td, int all)
 212 {
 213         char state[9], wprefix;
 214         const char *wmesg;
 215         void *wchan;
 216
 217         if (all) {
 218                 db_printf("%6d                  ", td->td_tid);
 219                 switch (td->td_state) {
 220                 case TDS_RUNNING:
 221                         snprintf(state, sizeof(state), "Run");
 222                         break;
 223                 case TDS_RUNQ:
 224                         snprintf(state, sizeof(state), "RunQ");
 225                         break;
 226                 case TDS_CAN_RUN:
 227                         snprintf(state, sizeof(state), "CanRun");
 228                         break;
 229                 case TDS_INACTIVE:
 230                         snprintf(state, sizeof(state), "Inactv");
 231                         break;
 232                 case TDS_INHIBITED:
 233                         state[0] = '\0';
 234                         if (TD_ON_LOCK(td))
 235                                 strlcat(state, "L", sizeof(state));
 236                         if (TD_IS_SLEEPING(td)) {
 237                                 if (td->td_flags & TDF_SINTR)
 238                                         strlcat(state, "S", sizeof(state));
 239                                 else
 240                                         strlcat(state, "D", sizeof(state));
 241                         }
 242                         if (TD_IS_SWAPPED(td))
 243                                 strlcat(state, "W", sizeof(state));
 244                         if (TD_AWAITING_INTR(td))
 245                                 strlcat(state, "I", sizeof(state));
 246                         if (TD_IS_SUSPENDED(td))
 247                                 strlcat(state, "s", sizeof(state));
 248                         if (state[0] != '\0')
 249                                 break;
 250                 default:
 251                         snprintf(state, sizeof(state), "???");
 252                 }
 253                 db_printf(" %-6.6s ", state);
 254         }
 255         wprefix = ' ';
 256         if (TD_ON_LOCK(td)) {
 257                 wprefix = '*';
 258                 wmesg = td->td_lockname;
 259                 wchan = td->td_blocked;
 260         } else if (TD_ON_SLEEPQ(td)) {
 261                 wmesg = td->td_wmesg;
 262                 wchan = td->td_wchan;
 263         } else if (TD_IS_RUNNING(td)) {
 264                 snprintf(state, sizeof(state), "CPU %d", td->td_oncpu);
 265                 wmesg = state;
 266                 wchan = NULL;
 267         } else {
 268                 wmesg = "";
 269                 wchan = NULL;
 270         }
 271         db_printf("%c%-8.8s ", wprefix, wmesg);
 272         if (wchan == NULL)
 273 #ifdef __LP64__
 274                 db_printf("%18s ", "");
 275 #else
 276                 db_printf("%10s ", "");
 277 #endif
 278         else
 279                 db_printf("%p ", wchan);
 280         if (p->p_flag & P_SYSTEM)
 281                 db_printf("[");
 282         if (td->td_name[0] != '\0')
 283                 db_printf("%s", td->td_name);
 284         else
 285                 db_printf("%s", td->td_proc->p_comm);
 286         if (p->p_flag & P_SYSTEM)
 287                 db_printf("]");
 288         db_printf("\n");
 289 }
 290
 291 DB_SHOW_COMMAND(thread, db_show_thread)
 292 {
 293         struct thread *td;
 294         struct lock_object *lock;
 295         boolean_t comma;
 296
 297         /* Determine which thread to examine. */
 298         if (have_addr)
 299                 td = db_lookup_thread(addr, FALSE);
 300         else
 301                 td = kdb_thread;
 302         lock = (struct lock_object *)td->td_lock;
 303
 304         db_printf("Thread %d at %p:\n", td->td_tid, td);
 305         db_printf(" proc (pid %d): %p\n", td->td_proc->p_pid, td->td_proc);
 306         if (td->td_name[0] != '\0')
 307                 db_printf(" name: %s\n", td->td_name);
 308         db_printf(" stack: %p-%p\n", (void *)td->td_kstack,
 309             (void *)(td->td_kstack + td->td_kstack_pages * PAGE_SIZE - 1));
 310         db_printf(" flags: %#x ", td->td_flags);
 311         db_printf(" pflags: %#x\n", td->td_pflags);
 312         db_printf(" state: ");
 313         switch (td->td_state) {
 314         case TDS_INACTIVE:
 315                 db_printf("INACTIVE\n");
 316                 break;
 317         case TDS_CAN_RUN:
 318                 db_printf("CAN RUN\n");
 319                 break;
 320         case TDS_RUNQ:
 321                 db_printf("RUNQ\n");
 322                 break;
 323         case TDS_RUNNING:
 324                 db_printf("RUNNING (CPU %d)\n", td->td_oncpu);
 325                 break;
 326         case TDS_INHIBITED:
 327                 db_printf("INHIBITED: {");
 328                 comma = FALSE;
 329                 if (TD_IS_SLEEPING(td)) {
 330                         db_printf("SLEEPING");
 331                         comma = TRUE;
 332                 }
 333                 if (TD_IS_SUSPENDED(td)) {
 334                         if (comma)
 335                                 db_printf(", ");
 336                         db_printf("SUSPENDED");
 337                         comma = TRUE;
 338                 }
 339                 if (TD_IS_SWAPPED(td)) {
 340                         if (comma)
 341                                 db_printf(", ");
 342                         db_printf("SWAPPED");
 343                         comma = TRUE;
 344                 }
 345                 if (TD_ON_LOCK(td)) {
 346                         if (comma)
 347                                 db_printf(", ");
 348                         db_printf("LOCK");
 349                         comma = TRUE;
 350                 }
 351                 if (TD_AWAITING_INTR(td)) {
 352                         if (comma)
 353                                 db_printf(", ");
 354                         db_printf("IWAIT");
 355                 }
 356                 db_printf("}\n");
 357                 break;
 358         default:
 359                 db_printf("??? (%#x)\n", td->td_state);
 360                 break;
 361         }
 362         if (TD_ON_LOCK(td))
 363                 db_printf(" lock: %s  turnstile: %p\n", td->td_lockname,
 364                     td->td_blocked);
 365         if (TD_ON_SLEEPQ(td))
 366                 db_printf(" wmesg: %s  wchan: %p\n", td->td_wmesg,
 367                     td->td_wchan);
 368         db_printf(" priority: %d\n", td->td_priority);
 369         db_printf(" container lock: %s (%p)\n", lock->lo_name, lock);
 370 }
 371
 372 DB_SHOW_COMMAND(proc, db_show_proc)
 373 {
 374         struct thread *td;
 375         struct proc *p;
 376         int i;
 377
 378         /* Determine which process to examine. */
 379         if (have_addr)
 380                 p = db_lookup_proc(addr);
 381         else
 382                 p = kdb_thread->td_proc;
 383
 384         db_printf("Process %d (%s) at %p:\n", p->p_pid, p->p_comm, p);
 385         db_printf(" state: ");
 386         switch (p->p_state) {
 387         case PRS_NEW:
 388                 db_printf("NEW\n");
 389                 break;
 390         case PRS_NORMAL:
 391                 db_printf("NORMAL\n");
 392                 break;
 393         case PRS_ZOMBIE:
 394                 db_printf("ZOMBIE\n");
 395                 break;
 396         default:
 397                 db_printf("??? (%#x)\n", p->p_state);
 398         }
 399         if (p->p_ucred != NULL) {
 400                 db_printf(" uid: %d  gids: ", p->p_ucred->cr_uid);
 401                 for (i = 0; i < p->p_ucred->cr_ngroups; i++) {
 402                         db_printf("%d", p->p_ucred->cr_groups[i]);
 403                         if (i < (p->p_ucred->cr_ngroups - 1))
 404                                 db_printf(", ");
 405                 }
 406                 db_printf("\n");
 407         }
 408         if (p->p_pptr != NULL)
 409                 db_printf(" parent: pid %d at %p\n", p->p_pptr->p_pid,
 410                     p->p_pptr);
 411         if (p->p_leader != NULL && p->p_leader != p)
 412                 db_printf(" leader: pid %d at %p\n", p->p_leader->p_pid,
 413                     p->p_leader);
 414         if (p->p_sysent != NULL)
 415                 db_printf(" ABI: %s\n", p->p_sysent->sv_name);
 416         if (p->p_args != NULL)
 417                 db_printf(" arguments: %.*s\n", (int)p->p_args->ar_length,
 418                     p->p_args->ar_args);
 419         db_printf(" threads: %d\n", p->p_numthreads);
 420         FOREACH_THREAD_IN_PROC(p, td) {
 421                 dumpthread(p, td, 1);
 422                 if (db_pager_quit)
 423                         break;
 424         }
 425 }