6/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, quit, rflag, sflag, dflag, lflag, wflag;
  77
  78         np = nprocs;
  79         quit = 0;
  80
  81         if (!LIST_EMPTY(&allproc))
  82                 p = LIST_FIRST(&allproc);
  83         else
  84                 p = &proc0;
  85
  86         db_setup_paging(db_simple_pager, &quit, db_lines_per_page);
  87 #ifdef __LP64__
  88         db_printf("  pid  ppid  pgrp   uid   state   wmesg         wchan        cmd\n");
  89 #else
  90         db_printf("  pid  ppid  pgrp   uid   state   wmesg     wchan    cmd\n");
  91 #endif
  92         while (--np >= 0 && !quit) {
  93                 if (p == NULL) {
  94                         db_printf("oops, ran out of processes early!\n");
  95                         break;
  96                 }
  97                 pp = p->p_pptr;
  98                 if (pp == NULL)
  99                         pp = p;
 100
 101                 cred = p->p_ucred;
 102                 pgrp = p->p_pgrp;
 103                 db_printf("%5d %5d %5d %5d ", p->p_pid, pp->p_pid,
 104                     pgrp != NULL ? pgrp->pg_id : 0,
 105                     cred != NULL ? cred->cr_ruid : 0);
 106
 107                 /* Determine our primary process state. */
 108                 switch (p->p_state) {
 109                 case PRS_NORMAL:
 110                         if (P_SHOULDSTOP(p))
 111                                 state[0] = 'T';
 112                         else {
 113                                 /*
 114                                  * One of D, L, R, S, W.  For a
 115                                  * multithreaded process we will use
 116                                  * the state of the thread with the
 117                                  * highest precedence.  The
 118                                  * precendence order from high to low
 119                                  * is R, L, D, S, W.  If no thread is
 120                                  * in a sane state we use '?' for our
 121                                  * primary state.
 122                                  */
 123                                 rflag = sflag = dflag = lflag = wflag = 0;
 124                                 FOREACH_THREAD_IN_PROC(p, td) {
 125                                         if (td->td_state == TDS_RUNNING ||
 126                                             td->td_state == TDS_RUNQ ||
 127                                             td->td_state == TDS_CAN_RUN)
 128                                                 rflag++;
 129                                         if (TD_ON_LOCK(td))
 130                                                 lflag++;
 131                                         if (TD_IS_SLEEPING(td)) {
 132                                                 if (!td->td_flags & TDF_SINTR)
 133                                                         dflag++;
 134                                                 else
 135                                                         sflag++;
 136                                         }
 137                                         if (TD_AWAITING_INTR(td))
 138                                                 wflag++;
 139                                 }
 140                                 if (rflag)
 141                                         state[0] = 'R';
 142                                 else if (lflag)
 143                                         state[0] = 'L';
 144                                 else if (dflag)
 145                                         state[0] = 'D';
 146                                 else if (sflag)
 147                                         state[0] = 'S';
 148                                 else if (wflag)
 149                                         state[0] = 'W';
 150                                 else
 151                                         state[0] = '?';
 152                         }
 153                         break;
 154                 case PRS_NEW:
 155                         state[0] = 'N';
 156                         break;
 157                 case PRS_ZOMBIE:
 158                         state[0] = 'Z';
 159                         break;
 160                 default:
 161                         state[0] = 'U';
 162                         break;
 163                 }
 164                 state[1] = '\0';
 165
 166                 /* Additional process state flags. */
 167                 if (!p->p_sflag & PS_INMEM)
 168                         strlcat(state, "W", sizeof(state));
 169                 if (p->p_flag & P_TRACED)
 170                         strlcat(state, "X", sizeof(state));
 171                 if (p->p_flag & P_WEXIT && p->p_state != PRS_ZOMBIE)
 172                         strlcat(state, "E", sizeof(state));
 173                 if (p->p_flag & P_PPWAIT)
 174                         strlcat(state, "V", sizeof(state));
 175                 if (p->p_flag & P_SYSTEM || p->p_lock > 0)
 176                         strlcat(state, "L", sizeof(state));
 177                 if (p->p_session != NULL && SESS_LEADER(p))
 178                         strlcat(state, "s", sizeof(state));
 179                 /* Cheated here and didn't compare pgid's. */
 180                 if (p->p_flag & P_CONTROLT)
 181                         strlcat(state, "+", sizeof(state));
 182                 if (cred != NULL && jailed(cred))
 183                         strlcat(state, "J", sizeof(state));
 184                 db_printf(" %-6.6s ", state);
 185                 if (p->p_flag & P_HADTHREADS)
 186 #ifdef __LP64__
 187                         db_printf(" (threaded)                  %s\n",
 188                             p->p_comm);
 189 #else
 190                         db_printf(" (threaded)          %s\n", p->p_comm);
 191 #endif
 192                 FOREACH_THREAD_IN_PROC(p, td) {
 193                         dumpthread(p, td, p->p_flag & P_HADTHREADS);
 194                         if (quit)
 195                                 break;
 196                 }
 197
 198                 p = LIST_NEXT(p, p_list);
 199                 if (p == NULL && np > 0)
 200                         p = LIST_FIRST(&zombproc);
 201         }
 202 }
 203
 204 static void
 205 dumpthread(volatile struct proc *p, volatile struct thread *td, int all)
 206 {
 207         char state[9], wprefix;
 208         const char *wmesg;
 209         void *wchan;
 210
 211         if (all) {
 212                 db_printf("%6d                  ", td->td_tid);
 213                 switch (td->td_state) {
 214                 case TDS_RUNNING:
 215                         snprintf(state, sizeof(state), "Run");
 216                         break;
 217                 case TDS_RUNQ:
 218                         snprintf(state, sizeof(state), "RunQ");
 219                         break;
 220                 case TDS_CAN_RUN:
 221                         snprintf(state, sizeof(state), "CanRun");
 222                         break;
 223                 case TDS_INACTIVE:
 224                         snprintf(state, sizeof(state), "Inactv");
 225                         break;
 226                 case TDS_INHIBITED:
 227                         state[0] = '\0';
 228                         if (TD_ON_LOCK(td))
 229                                 strlcat(state, "L", sizeof(state));
 230                         if (TD_IS_SLEEPING(td)) {
 231                                 if (td->td_flags & TDF_SINTR)
 232                                         strlcat(state, "S", sizeof(state));
 233                                 else
 234                                         strlcat(state, "D", sizeof(state));
 235                         }
 236                         if (TD_IS_SWAPPED(td))
 237                                 strlcat(state, "W", sizeof(state));
 238                         if (TD_AWAITING_INTR(td))
 239                                 strlcat(state, "I", sizeof(state));
 240                         if (TD_IS_SUSPENDED(td))
 241                                 strlcat(state, "s", sizeof(state));
 242                         if (state[0] != '\0')
 243                                 break;
 244                 default:
 245                         snprintf(state, sizeof(state), "???");
 246                 }
 247                 db_printf(" %-6.6s ", state);
 248         }
 249         wprefix = ' ';
 250         if (TD_ON_LOCK(td)) {
 251                 wprefix = '*';
 252                 wmesg = td->td_lockname;
 253                 wchan = td->td_blocked;
 254         } else if (TD_ON_SLEEPQ(td)) {
 255                 wmesg = td->td_wmesg;
 256                 wchan = td->td_wchan;
 257         } else if (TD_IS_RUNNING(td)) {
 258                 snprintf(state, sizeof(state), "CPU %d", td->td_oncpu);
 259                 wmesg = state;
 260                 wchan = NULL;
 261         } else {
 262                 wmesg = "";
 263                 wchan = NULL;
 264         }
 265         db_printf("%c%-8.8s ", wprefix, wmesg);
 266         if (wchan == NULL)
 267 #ifdef __LP64__
 268                 db_printf("%18s ", "");
 269 #else
 270                 db_printf("%10s ", "");
 271 #endif
 272         else
 273                 db_printf("%p ", wchan);
 274         if (p->p_flag & P_SYSTEM)
 275                 db_printf("[");
 276         db_printf("%s", td->td_proc->p_comm);
 277         if (p->p_flag & P_SYSTEM)
 278                 db_printf("]");
 279         db_printf("\n");
 280 }
 281
 282 DB_SHOW_COMMAND(thread, db_show_thread)
 283 {
 284         struct thread *td;
 285         boolean_t comma;
 286
 287         /* Determine which thread to examine. */
 288         if (have_addr)
 289                 td = db_lookup_thread(addr, FALSE);
 290         else
 291                 td = kdb_thread;
 292
 293         db_printf("Thread %d at %p:\n", td->td_tid, td);
 294         db_printf(" proc (pid %d): %p ", td->td_proc->p_pid, td->td_proc);
 295         db_printf(" ksegrp: %p\n", td->td_ksegrp);
 296         db_printf(" flags: %#x ", td->td_flags);
 297         db_printf(" pflags: %#x\n", td->td_pflags);
 298         db_printf(" state: ");
 299         switch (td->td_state) {
 300         case TDS_INACTIVE:
 301                 db_printf("INACTIVE\n");
 302                 break;
 303         case TDS_CAN_RUN:
 304                 db_printf("CAN RUN\n");
 305                 break;
 306         case TDS_RUNQ:
 307                 db_printf("RUNQ\n");
 308                 break;
 309         case TDS_RUNNING:
 310                 db_printf("RUNNING (CPU %d)\n", td->td_oncpu);
 311                 break;
 312         case TDS_INHIBITED:
 313                 db_printf("INHIBITED: {");
 314                 comma = FALSE;
 315                 if (TD_IS_SLEEPING(td)) {
 316                         db_printf("SLEEPING");
 317                         comma = TRUE;
 318                 }
 319                 if (TD_IS_SUSPENDED(td)) {
 320                         if (comma)
 321                                 db_printf(", ");
 322                         db_printf("SUSPENDED");
 323                         comma = TRUE;
 324                 }
 325                 if (TD_IS_SWAPPED(td)) {
 326                         if (comma)
 327                                 db_printf(", ");
 328                         db_printf("SWAPPED");
 329                         comma = TRUE;
 330                 }
 331                 if (TD_ON_LOCK(td)) {
 332                         if (comma)
 333                                 db_printf(", ");
 334                         db_printf("LOCK");
 335                         comma = TRUE;
 336                 }
 337                 if (TD_AWAITING_INTR(td)) {
 338                         if (comma)
 339                                 db_printf(", ");
 340                         db_printf("IWAIT");
 341                 }
 342                 db_printf("}\n");
 343                 break;
 344         default:
 345                 db_printf("??? (%#x)\n", td->td_state);
 346                 break;
 347         }
 348         if (TD_ON_LOCK(td))
 349                 db_printf(" lock: %s  turnstile: %p\n", td->td_lockname,
 350                     td->td_blocked);
 351         if (TD_ON_SLEEPQ(td))
 352                 db_printf(" wmesg: %s  wchan: %p\n", td->td_wmesg,
 353                     td->td_wchan);
 354         db_printf(" priority: %d\n", td->td_priority);
 355 }
 356
 357 DB_SHOW_COMMAND(proc, db_show_proc)
 358 {
 359         struct thread *td;
 360         struct proc *p;
 361         int i, quit;
 362
 363         /* Determine which process to examine. */
 364         if (have_addr)
 365                 p = db_lookup_proc(addr);
 366         else
 367                 p = kdb_thread->td_proc;
 368
 369         quit = 0;
 370         db_setup_paging(db_simple_pager, &quit, db_lines_per_page);
 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 (quit)
 410                         break;
 411         }
 412 }