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/systm.h>
  35 #include <sys/jail.h>
  36 #include <sys/kdb.h>
  37 #include <sys/linker_set.h>
  38 #include <sys/lock.h>
  39 #include <sys/mutex.h>
  40 #include <sys/proc.h>
  41 #include <sys/sysent.h>
  42 #include <sys/cons.h>
  43 #include <vm/vm.h>
  44 #include <vm/vm_param.h>
  45 #include <vm/pmap.h>
  46
  47 #include <ddb/ddb.h>
  48
  49 /* XXX I'd prefer a better way. */
  50 #if defined(__alpha__) || defined(__amd64__) || defined(__ia64__) || defined(__sparc64__)
  51 #define PTR64
  52 #endif
  53
  54 #ifdef PTR64
  55 CTASSERT(sizeof(uintptr_t) == sizeof(uint64_t));
  56 #else
  57 CTASSERT(sizeof(uintptr_t) == sizeof(uint32_t));
  58 #endif
  59
  60 static void     dumpthread(volatile struct proc *p, volatile struct thread *td,
  61                     int all);
  62
  63 /*
  64  * Layout:
  65  * - column counts
  66  * - header
  67  * - single-threaded process
  68  * - multi-threaded process
  69  * - thread in a MT process
  70  *
  71  *          1         2         3         4         5         6         7
  72  * 1234567890123456789012345678901234567890123456789012345678901234567890
  73  *  pid   uid  ppid  pgrp  state   wmesg      wchan    cmd
  74  * <pid> <ui> <ppi> <pgi> <stat> < wmesg > <  wchan  > <name>
  75  * <pid> <ui> <ppi> <pgi> <stat>  (threaded)           <command>
  76  *  <tid    >             <stat> < wmesg > <  wchan  > <name>
  77  *
  78  * For machines with 64-bit pointers, we expand the wchan field 8 more
  79  * characters.
  80  */
  81 void
  82 db_ps(db_expr_t addr, boolean_t hasaddr, db_expr_t count, char *modif)
  83 {
  84         volatile struct proc *p, *pp;
  85         volatile struct thread *td;
  86         struct ucred *cred;
  87         struct pgrp *pgrp;
  88         char state[9];
  89         int np, quit, rflag, sflag, dflag, lflag, wflag;
  90
  91         np = nprocs;
  92         quit = 0;
  93
  94         /* sx_slock(&allproc_lock); */
  95         if (!LIST_EMPTY(&allproc))
  96                 p = LIST_FIRST(&allproc);
  97         else
  98                 p = &proc0;
  99
 100         db_setup_paging(db_simple_pager, &quit, db_lines_per_page);
 101 #ifdef PTR64
 102         db_printf(" pid   uid  ppid  pgrp  state   wmesg          wchan        cmd\n");
 103 #else
 104         db_printf(" pid   uid  ppid  pgrp  state   wmesg      wchan    cmd\n");
 105 #endif
 106         while (--np >= 0 && !quit) {
 107                 if (p == NULL) {
 108                         db_printf("oops, ran out of processes early!\n");
 109                         break;
 110                 }
 111                 /* PROC_LOCK(p); */
 112                 pp = p->p_pptr;
 113                 if (pp == NULL)
 114                         pp = p;
 115
 116                 cred = p->p_ucred;
 117                 pgrp = p->p_pgrp;
 118                 db_printf("%5d %4d %5d %5d ", p->p_pid,
 119                     cred != NULL ? cred->cr_ruid : 0, pp->p_pid,
 120                     pgrp != NULL ? pgrp->pg_id : 0);
 121
 122                 /* Determine our primary process state. */
 123                 switch(p->p_state) {
 124                 case PRS_NORMAL:
 125                         if (P_SHOULDSTOP(p))
 126                                 state[0] = 'T';
 127                         else {
 128                                 /*
 129                                  * One of D, L, R, S, W.  For a
 130                                  * multithreaded process we will use
 131                                  * the state of the thread with the
 132                                  * highest precedence.  The
 133                                  * precendence order from high to low
 134                                  * is R, L, D, S, W.  If no thread is
 135                                  * in a sane state we use '?' for our
 136                                  * primary state.
 137                                  */
 138                                 rflag = sflag = dflag = lflag = wflag = 0;
 139                                 FOREACH_THREAD_IN_PROC(p, td) {
 140                                         if (td->td_state == TDS_RUNNING ||
 141                                             td->td_state == TDS_RUNQ ||
 142                                             td->td_state == TDS_CAN_RUN)
 143                                                 rflag++;
 144                                         if (TD_ON_LOCK(td))
 145                                                 lflag++;
 146                                         if (TD_IS_SLEEPING(td)) {
 147                                                 if (!td->td_flags & TDF_SINTR)
 148                                                         dflag++;
 149                                                 else
 150                                                         sflag++;
 151                                         }
 152                                         if (TD_AWAITING_INTR(td))
 153                                                 wflag++;
 154                                 }
 155                                 if (rflag)
 156                                         state[0] = 'R';
 157                                 else if (lflag)
 158                                         state[0] = 'L';
 159                                 else if (dflag)
 160                                         state[0] = 'D';
 161                                 else if (sflag)
 162                                         state[0] = 'S';
 163                                 else if (wflag)
 164                                         state[0] = 'W';
 165                                 else
 166                                         state[0] = '?';
 167                         }
 168                         break;
 169                 case PRS_NEW:
 170                         state[0] = 'N';
 171                         break;
 172                 case PRS_ZOMBIE:
 173                         state[0] = 'Z';
 174                         break;
 175                 default:
 176                         state[0] = 'U';
 177                         break;
 178                 }
 179                 state[1] = '\0';
 180
 181                 /* Additional process state flags. */
 182                 if (!p->p_sflag & PS_INMEM)
 183                         strlcat(state, "W", sizeof(state));
 184                 if (p->p_flag & P_TRACED)
 185                         strlcat(state, "X", sizeof(state));
 186                 if (p->p_flag & P_WEXIT && p->p_state != PRS_ZOMBIE)
 187                         strlcat(state, "E", sizeof(state));
 188                 if (p->p_flag & P_PPWAIT)
 189                         strlcat(state, "V", sizeof(state));
 190                 if (p->p_flag & P_SYSTEM || p->p_lock > 0)
 191                         strlcat(state, "L", sizeof(state));
 192                 if (p->p_session != NULL && SESS_LEADER(p))
 193                         strlcat(state, "s", sizeof(state));
 194                 /* Cheated here and didn't compare pgid's. */
 195                 if (p->p_flag & P_CONTROLT)
 196                         strlcat(state, "+", sizeof(state));
 197                 if (cred != NULL && jailed(cred))
 198                         strlcat(state, "J", sizeof(state));
 199                 db_printf(" %-6.6s ", state);
 200                 if (p->p_flag & P_HADTHREADS)
 201 #ifdef PTR64
 202                         db_printf(" (threaded)                  %s\n",
 203                             p->p_comm);
 204 #else
 205                         db_printf(" (threaded)          %s\n", p->p_comm);
 206 #endif
 207                 FOREACH_THREAD_IN_PROC(p, td) {
 208                         dumpthread(p, td, p->p_flag & P_HADTHREADS);
 209                         if (quit)
 210                                 break;
 211                 }
 212                 /* PROC_UNLOCK(p); */
 213
 214                 p = LIST_NEXT(p, p_list);
 215                 if (p == NULL && np > 0)
 216                         p = LIST_FIRST(&zombproc);
 217         }
 218         /* sx_sunlock(&allproc_lock); */
 219 }
 220
 221 static void
 222 dumpthread(volatile struct proc *p, volatile struct thread *td, int all)
 223 {
 224         char state[9], wprefix;
 225         const char *wmesg;
 226         void *wchan;
 227
 228         if (all) {
 229                 db_printf(" %9d             ", td->td_tid);
 230                 switch (td->td_state) {
 231                 case TDS_RUNNING:
 232                         snprintf(state, sizeof(state), "Run");
 233                         break;
 234                 case TDS_RUNQ:
 235                         snprintf(state, sizeof(state), "RunQ");
 236                         break;
 237                 case TDS_CAN_RUN:
 238                         snprintf(state, sizeof(state), "CanRun");
 239                         break;
 240                 case TDS_INACTIVE:
 241                         snprintf(state, sizeof(state), "Inactv");
 242                         break;
 243                 case TDS_INHIBITED:
 244                         state[0] = '\0';
 245                         if (TD_ON_LOCK(td))
 246                                 strlcat(state, "L", sizeof(state));
 247                         if (TD_IS_SLEEPING(td)) {
 248                                 if (td->td_flags & TDF_SINTR)
 249                                         strlcat(state, "S", sizeof(state));
 250                                 else
 251                                         strlcat(state, "D", sizeof(state));
 252                         }
 253                         if (TD_IS_SWAPPED(td))
 254                                 strlcat(state, "W", sizeof(state));
 255                         if (TD_AWAITING_INTR(td))
 256                                 strlcat(state, "I", sizeof(state));
 257                         if (TD_IS_SUSPENDED(td))
 258                                 strlcat(state, "s", sizeof(state));
 259                         if (state[0] != '\0')
 260                                 break;
 261                 default:
 262                         snprintf(state, sizeof(state), "???");
 263                 }
 264                 db_printf(" %-6.6s ", state);
 265         }
 266         wprefix = ' ';
 267         if (TD_ON_LOCK(td)) {
 268                 wprefix = '*';
 269                 wmesg = td->td_lockname;
 270                 wchan = td->td_blocked;
 271         } else if (TD_ON_SLEEPQ(td)) {
 272                 wmesg = td->td_wmesg;
 273                 wchan = td->td_wchan;
 274         } else if (TD_IS_RUNNING(td)) {
 275                 snprintf(state, sizeof(state), "CPU %d", td->td_oncpu);
 276                 wmesg = state;
 277                 wchan = NULL;
 278         } else {
 279                 wmesg = "";
 280                 wchan = NULL;
 281         }
 282         db_printf("%c%-8.8s ", wprefix, wmesg);
 283         if (wchan == NULL)
 284 #ifdef PTR64
 285                 db_printf("%18s ", "");
 286 #else
 287                 db_printf("%10s ", "");
 288 #endif
 289         else
 290                 db_printf("%p ", wchan);
 291         if (p->p_flag & P_SYSTEM)
 292                 db_printf("[");
 293         if (td->td_name[0] != '\0')
 294                 db_printf("%s", td->td_name);
 295         else
 296                 db_printf("%s", td->td_proc->p_comm);
 297         if (p->p_flag & P_SYSTEM)
 298                 db_printf("]");
 299         db_printf("\n");
 300 }
 301
 302 DB_SHOW_COMMAND(thread, db_show_thread)
 303 {
 304         struct thread *td;
 305         boolean_t comma;
 306
 307         /* Determine which thread to examine. */
 308         if (have_addr)
 309                 td = db_lookup_thread(addr, FALSE);
 310         else
 311                 td = kdb_thread;
 312
 313         db_printf("Thread %d at %p:\n", td->td_tid, td);
 314         db_printf(" proc (pid %d): %p ", td->td_proc->p_pid, td->td_proc);
 315         db_printf(" ksegrp: %p\n", td->td_ksegrp);
 316         if (td->td_name[0] != '\0')
 317                 db_printf(" name: %s\n", td->td_name);
 318         db_printf(" flags: %#x ", td->td_flags);
 319         db_printf(" pflags: %#x\n", td->td_pflags);
 320         db_printf(" state: ");
 321         switch (td->td_state) {
 322         case TDS_INACTIVE:
 323                 db_printf("INACTIVE\n");
 324                 break;
 325         case TDS_CAN_RUN:
 326                 db_printf("CAN RUN\n");
 327                 break;
 328         case TDS_RUNQ:
 329                 db_printf("RUNQ\n");
 330                 break;
 331         case TDS_RUNNING:
 332                 db_printf("RUNNING (CPU %d)\n", td->td_oncpu);
 333                 break;
 334         case TDS_INHIBITED:
 335                 db_printf("INHIBITED: {");
 336                 comma = FALSE;
 337                 if (TD_IS_SLEEPING(td)) {
 338                         db_printf("SLEEPING");
 339                         comma = TRUE;
 340                 }
 341                 if (TD_IS_SUSPENDED(td)) {
 342                         if (comma)
 343                                 db_printf(", ");
 344                         db_printf("SUSPENDED");
 345                         comma = TRUE;
 346                 }
 347                 if (TD_IS_SWAPPED(td)) {
 348                         if (comma)
 349                                 db_printf(", ");
 350                         db_printf("SWAPPED");
 351                         comma = TRUE;
 352                 }
 353                 if (TD_ON_LOCK(td)) {
 354                         if (comma)
 355                                 db_printf(", ");
 356                         db_printf("LOCK");
 357                         comma = TRUE;
 358                 }
 359                 if (TD_AWAITING_INTR(td)) {
 360                         if (comma)
 361                                 db_printf(", ");
 362                         db_printf("IWAIT");
 363                 }
 364                 db_printf("}\n");
 365                 break;
 366         default:
 367                 db_printf("??? (%#x)\n", td->td_state);
 368                 break;
 369         }
 370         if (TD_ON_LOCK(td))
 371                 db_printf(" lock: %s  turnstile: %p\n", td->td_lockname,
 372                     td->td_blocked);
 373         if (TD_ON_SLEEPQ(td))
 374                 db_printf(" wmesg: %s  wchan: %p\n", td->td_wmesg,
 375                     td->td_wchan);
 376         db_printf(" priority: %d\n", td->td_priority);
 377 }
 378
 379 DB_SHOW_COMMAND(proc, db_show_proc)
 380 {
 381         struct thread *td;
 382         struct proc *p;
 383         int i, quit;
 384
 385         /* Determine which process to examine. */
 386         if (have_addr)
 387                 p = db_lookup_proc(addr);
 388         else
 389                 p = kdb_thread->td_proc;
 390
 391         quit = 0;
 392         db_setup_paging(db_simple_pager, &quit, db_lines_per_page);
 393         db_printf("Process %d (%s) at %p:\n", p->p_pid, p->p_comm, p);
 394         db_printf(" state: ");
 395         switch (p->p_state) {
 396         case PRS_NEW:
 397                 db_printf("NEW\n");
 398                 break;
 399         case PRS_NORMAL:
 400                 db_printf("NORMAL\n");
 401                 break;
 402         case PRS_ZOMBIE:
 403                 db_printf("ZOMBIE\n");
 404                 break;
 405         default:
 406                 db_printf("??? (%#x)\n", p->p_state);
 407         }
 408         if (p->p_ucred != NULL) {
 409                 db_printf(" uid: %d  gids: ", p->p_ucred->cr_uid);
 410                 for (i = 0; i < p->p_ucred->cr_ngroups; i++) {
 411                         db_printf("%d", p->p_ucred->cr_groups[i]);
 412                         if (i < (p->p_ucred->cr_ngroups - 1))
 413                                 db_printf(", ");
 414                 }
 415                 db_printf("\n");
 416         }
 417         if (p->p_pptr != NULL)
 418                 db_printf(" parent: pid %d at %p\n", p->p_pptr->p_pid,
 419                     p->p_pptr);
 420         if (p->p_leader != NULL && p->p_leader != p)
 421                 db_printf(" leader: pid %d at %p\n", p->p_leader->p_pid,
 422                     p->p_leader);
 423         if (p->p_sysent != NULL)
 424                 db_printf(" ABI: %s\n", p->p_sysent->sv_name);
 425         if (p->p_args != NULL)
 426                 db_printf(" arguments: %.*s\n", (int)p->p_args->ar_length,
 427                     p->p_args->ar_args);
 428         db_printf(" threads: %d\n", p->p_numthreads);
 429         FOREACH_THREAD_IN_PROC(p, td) {
 430                 dumpthread(p, td, 1);
 431                 if (quit)
 432                         break;
 433         }
 434 }