Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/ddb/db_ps.c
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1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1993 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include "opt_kstack_pages.h" 36 37 #include <sys/param.h> 38 #include <sys/cons.h> 39 #include <sys/jail.h> 40 #include <sys/kdb.h> 41 #include <sys/kernel.h> 42 #include <sys/proc.h> 43 #include <sys/sysent.h> 44 #include <sys/systm.h> 45 #include <vm/vm.h> 46 #include <vm/vm_param.h> 47 #include <vm/pmap.h> 48 #include <vm/vm_map.h> 49 50 #include <ddb/ddb.h> 51 52 #define PRINT_NONE 0 53 #define PRINT_ARGS 1 54 55 static void dumpthread(volatile struct proc *p, volatile struct thread *td, 56 int all); 57 static void db_ps_proc(struct proc *p); 58 static int ps_mode; 59 60 /* 61 * At least one non-optional show-command must be implemented using 62 * DB_SHOW_ALL_COMMAND() so that db_show_all_cmd_set gets created. 63 * Here is one. 64 */ 65 DB_SHOW_ALL_COMMAND(procs, db_procs_cmd) 66 { 67 db_ps(addr, have_addr, count, modif); 68 } 69 70 static void 71 dump_args(volatile struct proc *p) 72 { 73 char *args; 74 int i, len; 75 76 if (p->p_args == NULL) 77 return; 78 args = p->p_args->ar_args; 79 len = (int)p->p_args->ar_length; 80 for (i = 0; i < len; i++) { 81 if (args[i] == '\0') 82 db_printf(" "); 83 else 84 db_printf("%c", args[i]); 85 } 86 } 87 88 /* 89 * Layout: 90 * - column counts 91 * - header 92 * - single-threaded process 93 * - multi-threaded process 94 * - thread in a MT process 95 * 96 * 1 2 3 4 5 6 7 97 * 1234567890123456789012345678901234567890123456789012345678901234567890 98 * pid ppid pgrp uid state wmesg wchan cmd 99 * <pid> <ppi> <pgi> <uid> <stat> <wmesg> <wchan > <name> 100 * <pid> <ppi> <pgi> <uid> <stat> (threaded) <command> 101 * <tid > <stat> <wmesg> <wchan > <name> 102 * 103 * For machines with 64-bit pointers, we expand the wchan field 8 more 104 * characters. 105 */ 106 void 107 db_ps(db_expr_t addr, bool hasaddr, db_expr_t count, char *modif) 108 { 109 struct proc *p; 110 int i; 111 112 ps_mode = modif[0] == 'a' ? PRINT_ARGS : PRINT_NONE; 113 114 #ifdef __LP64__ 115 db_printf(" pid ppid pgrp uid state wmesg wchan cmd\n"); 116 #else 117 db_printf(" pid ppid pgrp uid state wmesg wchan cmd\n"); 118 #endif 119 120 if (!LIST_EMPTY(&allproc)) 121 p = LIST_FIRST(&allproc); 122 else 123 p = &proc0; 124 for (; p != NULL && !db_pager_quit; p = LIST_NEXT(p, p_list)) 125 db_ps_proc(p); 126 127 /* 128 * Processes such as zombies not in allproc. 129 */ 130 for (i = 0; i <= pidhash && !db_pager_quit; i++) { 131 LIST_FOREACH(p, &pidhashtbl[i], p_hash) { 132 if (p->p_list.le_prev == NULL) 133 db_ps_proc(p); 134 } 135 } 136 } 137 138 static void 139 db_ps_proc(struct proc *p) 140 { 141 volatile struct proc *pp; 142 volatile struct thread *td; 143 struct ucred *cred; 144 struct pgrp *pgrp; 145 char state[9]; 146 int rflag, sflag, dflag, lflag, wflag; 147 148 pp = p->p_pptr; 149 if (pp == NULL) 150 pp = p; 151 152 cred = p->p_ucred; 153 pgrp = p->p_pgrp; 154 db_printf("%5d %5d %5d %5d ", p->p_pid, pp->p_pid, 155 pgrp != NULL ? pgrp->pg_id : 0, 156 cred != NULL ? cred->cr_ruid : 0); 157 158 /* Determine our primary process state. */ 159 switch (p->p_state) { 160 case PRS_NORMAL: 161 if (P_SHOULDSTOP(p)) 162 state[0] = 'T'; 163 else { 164 /* 165 * One of D, L, R, S, W. For a 166 * multithreaded process we will use 167 * the state of the thread with the 168 * highest precedence. The 169 * precendence order from high to low 170 * is R, L, D, S, W. If no thread is 171 * in a sane state we use '?' for our 172 * primary state. 173 */ 174 rflag = sflag = dflag = lflag = wflag = 0; 175 FOREACH_THREAD_IN_PROC(p, td) { 176 if (TD_GET_STATE(td) == TDS_RUNNING || 177 TD_GET_STATE(td) == TDS_RUNQ || 178 TD_GET_STATE(td) == TDS_CAN_RUN) 179 rflag++; 180 if (TD_ON_LOCK(td)) 181 lflag++; 182 if (TD_IS_SLEEPING(td)) { 183 if (!(td->td_flags & TDF_SINTR)) 184 dflag++; 185 else 186 sflag++; 187 } 188 if (TD_AWAITING_INTR(td)) 189 wflag++; 190 } 191 if (rflag) 192 state[0] = 'R'; 193 else if (lflag) 194 state[0] = 'L'; 195 else if (dflag) 196 state[0] = 'D'; 197 else if (sflag) 198 state[0] = 'S'; 199 else if (wflag) 200 state[0] = 'W'; 201 else 202 state[0] = '?'; 203 } 204 break; 205 case PRS_NEW: 206 state[0] = 'N'; 207 break; 208 case PRS_ZOMBIE: 209 state[0] = 'Z'; 210 break; 211 default: 212 state[0] = 'U'; 213 break; 214 } 215 state[1] = '\0'; 216 217 /* Additional process state flags. */ 218 if (!(p->p_flag & P_INMEM)) 219 strlcat(state, "W", sizeof(state)); 220 if (p->p_flag & P_TRACED) 221 strlcat(state, "X", sizeof(state)); 222 if (p->p_flag & P_WEXIT && p->p_state != PRS_ZOMBIE) 223 strlcat(state, "E", sizeof(state)); 224 if (p->p_flag & P_PPWAIT) 225 strlcat(state, "V", sizeof(state)); 226 if (p->p_flag & P_SYSTEM || p->p_lock > 0) 227 strlcat(state, "L", sizeof(state)); 228 if (p->p_pgrp != NULL && p->p_session != NULL && 229 SESS_LEADER(p)) 230 strlcat(state, "s", sizeof(state)); 231 /* Cheated here and didn't compare pgid's. */ 232 if (p->p_flag & P_CONTROLT) 233 strlcat(state, "+", sizeof(state)); 234 if (cred != NULL && jailed(cred)) 235 strlcat(state, "J", sizeof(state)); 236 db_printf(" %-6.6s ", state); 237 if (p->p_flag & P_HADTHREADS) { 238 #ifdef __LP64__ 239 db_printf(" (threaded) "); 240 #else 241 db_printf(" (threaded) "); 242 #endif 243 if (p->p_flag & P_SYSTEM) 244 db_printf("["); 245 db_printf("%s", p->p_comm); 246 if (p->p_flag & P_SYSTEM) 247 db_printf("]"); 248 if (ps_mode == PRINT_ARGS) { 249 db_printf(" "); 250 dump_args(p); 251 } 252 db_printf("\n"); 253 } 254 FOREACH_THREAD_IN_PROC(p, td) { 255 dumpthread(p, td, p->p_flag & P_HADTHREADS); 256 if (db_pager_quit) 257 break; 258 } 259 } 260 261 static void 262 dumpthread(volatile struct proc *p, volatile struct thread *td, int all) 263 { 264 char state[9], wprefix; 265 const char *wmesg; 266 const void *wchan; 267 268 if (all) { 269 db_printf("%6d ", td->td_tid); 270 switch (TD_GET_STATE(td)) { 271 case TDS_RUNNING: 272 snprintf(state, sizeof(state), "Run"); 273 break; 274 case TDS_RUNQ: 275 snprintf(state, sizeof(state), "RunQ"); 276 break; 277 case TDS_CAN_RUN: 278 snprintf(state, sizeof(state), "CanRun"); 279 break; 280 case TDS_INACTIVE: 281 snprintf(state, sizeof(state), "Inactv"); 282 break; 283 case TDS_INHIBITED: 284 state[0] = '\0'; 285 if (TD_ON_LOCK(td)) 286 strlcat(state, "L", sizeof(state)); 287 if (TD_IS_SLEEPING(td)) { 288 if (td->td_flags & TDF_SINTR) 289 strlcat(state, "S", sizeof(state)); 290 else 291 strlcat(state, "D", sizeof(state)); 292 } 293 if (TD_IS_SWAPPED(td)) 294 strlcat(state, "W", sizeof(state)); 295 if (TD_AWAITING_INTR(td)) 296 strlcat(state, "I", sizeof(state)); 297 if (TD_IS_SUSPENDED(td)) 298 strlcat(state, "s", sizeof(state)); 299 if (state[0] != '\0') 300 break; 301 default: 302 snprintf(state, sizeof(state), "???"); 303 } 304 db_printf(" %-6.6s ", state); 305 } 306 wprefix = ' '; 307 if (TD_ON_LOCK(td)) { 308 wprefix = '*'; 309 wmesg = td->td_lockname; 310 wchan = td->td_blocked; 311 } else if (TD_ON_SLEEPQ(td)) { 312 wmesg = td->td_wmesg; 313 wchan = td->td_wchan; 314 } else if (TD_IS_RUNNING(td)) { 315 snprintf(state, sizeof(state), "CPU %d", td->td_oncpu); 316 wmesg = state; 317 wchan = NULL; 318 } else { 319 wmesg = ""; 320 wchan = NULL; 321 } 322 db_printf("%c%-7.7s ", wprefix, wmesg); 323 if (wchan == NULL) 324 #ifdef __LP64__ 325 db_printf("%18s ", ""); 326 #else 327 db_printf("%10s ", ""); 328 #endif 329 else 330 db_printf("%p ", wchan); 331 if (p->p_flag & P_SYSTEM) 332 db_printf("["); 333 if (td->td_name[0] != '\0') 334 db_printf("%s", td->td_name); 335 else 336 db_printf("%s", td->td_proc->p_comm); 337 if (p->p_flag & P_SYSTEM) 338 db_printf("]"); 339 if (ps_mode == PRINT_ARGS && all == 0) { 340 db_printf(" "); 341 dump_args(p); 342 } 343 db_printf("\n"); 344 } 345 346 DB_SHOW_COMMAND(thread, db_show_thread) 347 { 348 struct thread *td; 349 struct lock_object *lock; 350 u_int delta; 351 bool comma; 352 353 /* Determine which thread to examine. */ 354 if (have_addr) 355 td = db_lookup_thread(addr, false); 356 else 357 td = kdb_thread; 358 lock = (struct lock_object *)td->td_lock; 359 360 db_printf("Thread %d at %p:\n", td->td_tid, td); 361 db_printf(" proc (pid %d): %p\n", td->td_proc->p_pid, td->td_proc); 362 if (td->td_name[0] != '\0') 363 db_printf(" name: %s\n", td->td_name); 364 db_printf(" pcb: %p\n", td->td_pcb); 365 db_printf(" stack: %p-%p\n", (void *)td->td_kstack, 366 (void *)(td->td_kstack + td->td_kstack_pages * PAGE_SIZE - 1)); 367 db_printf(" flags: %#x ", td->td_flags); 368 db_printf(" pflags: %#x\n", td->td_pflags); 369 db_printf(" state: "); 370 switch (TD_GET_STATE(td)) { 371 case TDS_INACTIVE: 372 db_printf("INACTIVE\n"); 373 break; 374 case TDS_CAN_RUN: 375 db_printf("CAN RUN\n"); 376 break; 377 case TDS_RUNQ: 378 db_printf("RUNQ\n"); 379 break; 380 case TDS_RUNNING: 381 db_printf("RUNNING (CPU %d)\n", td->td_oncpu); 382 break; 383 case TDS_INHIBITED: 384 db_printf("INHIBITED: {"); 385 comma = false; 386 if (TD_IS_SLEEPING(td)) { 387 db_printf("SLEEPING"); 388 comma = true; 389 } 390 if (TD_IS_SUSPENDED(td)) { 391 if (comma) 392 db_printf(", "); 393 db_printf("SUSPENDED"); 394 comma = true; 395 } 396 if (TD_IS_SWAPPED(td)) { 397 if (comma) 398 db_printf(", "); 399 db_printf("SWAPPED"); 400 comma = true; 401 } 402 if (TD_ON_LOCK(td)) { 403 if (comma) 404 db_printf(", "); 405 db_printf("LOCK"); 406 comma = true; 407 } 408 if (TD_AWAITING_INTR(td)) { 409 if (comma) 410 db_printf(", "); 411 db_printf("IWAIT"); 412 } 413 db_printf("}\n"); 414 break; 415 default: 416 db_printf("??? (%#x)\n", TD_GET_STATE(td)); 417 break; 418 } 419 if (TD_ON_LOCK(td)) 420 db_printf(" lock: %s turnstile: %p\n", td->td_lockname, 421 td->td_blocked); 422 if (TD_ON_SLEEPQ(td)) 423 db_printf( 424 " wmesg: %s wchan: %p sleeptimo %lx. %jx (curr %lx. %jx)\n", 425 td->td_wmesg, td->td_wchan, 426 (long)sbttobt(td->td_sleeptimo).sec, 427 (uintmax_t)sbttobt(td->td_sleeptimo).frac, 428 (long)sbttobt(sbinuptime()).sec, 429 (uintmax_t)sbttobt(sbinuptime()).frac); 430 db_printf(" priority: %d\n", td->td_priority); 431 db_printf(" container lock: %s (%p)\n", lock->lo_name, lock); 432 if (td->td_swvoltick != 0) { 433 delta = ticks - td->td_swvoltick; 434 db_printf(" last voluntary switch: %u.%03u s ago\n", 435 delta / hz, (delta % hz) * 1000 / hz); 436 } 437 if (td->td_swinvoltick != 0) { 438 delta = ticks - td->td_swinvoltick; 439 db_printf(" last involuntary switch: %u.%03u s ago\n", 440 delta / hz, (delta % hz) * 1000 / hz); 441 } 442 } 443 444 DB_SHOW_COMMAND(proc, db_show_proc) 445 { 446 struct thread *td; 447 struct proc *p; 448 int i; 449 450 /* Determine which process to examine. */ 451 if (have_addr) 452 p = db_lookup_proc(addr); 453 else 454 p = kdb_thread->td_proc; 455 456 db_printf("Process %d (%s) at %p:\n", p->p_pid, p->p_comm, p); 457 db_printf(" state: "); 458 switch (p->p_state) { 459 case PRS_NEW: 460 db_printf("NEW\n"); 461 break; 462 case PRS_NORMAL: 463 db_printf("NORMAL\n"); 464 break; 465 case PRS_ZOMBIE: 466 db_printf("ZOMBIE\n"); 467 break; 468 default: 469 db_printf("??? (%#x)\n", p->p_state); 470 } 471 if (p->p_ucred != NULL) { 472 db_printf(" uid: %d gids: ", p->p_ucred->cr_uid); 473 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 474 db_printf("%d", p->p_ucred->cr_groups[i]); 475 if (i < (p->p_ucred->cr_ngroups - 1)) 476 db_printf(", "); 477 } 478 db_printf("\n"); 479 } 480 if (p->p_pptr != NULL) 481 db_printf(" parent: pid %d at %p\n", p->p_pptr->p_pid, 482 p->p_pptr); 483 if (p->p_leader != NULL && p->p_leader != p) 484 db_printf(" leader: pid %d at %p\n", p->p_leader->p_pid, 485 p->p_leader); 486 if (p->p_sysent != NULL) 487 db_printf(" ABI: %s\n", p->p_sysent->sv_name); 488 db_printf(" flag: %#x ", p->p_flag); 489 db_printf(" flag2: %#x\n", p->p_flag2); 490 if (p->p_args != NULL) { 491 db_printf(" arguments: "); 492 dump_args(p); 493 db_printf("\n"); 494 } 495 db_printf(" reaper: %p reapsubtree: %d\n", 496 p->p_reaper, p->p_reapsubtree); 497 db_printf(" sigparent: %d\n", p->p_sigparent); 498 db_printf(" vmspace: %p\n", p->p_vmspace); 499 db_printf(" (map %p)\n", 500 (p->p_vmspace != NULL) ? &p->p_vmspace->vm_map : 0); 501 db_printf(" (map.pmap %p)\n", 502 (p->p_vmspace != NULL) ? &p->p_vmspace->vm_map.pmap : 0); 503 db_printf(" (pmap %p)\n", 504 (p->p_vmspace != NULL) ? &p->p_vmspace->vm_pmap : 0); 505 db_printf(" threads: %d\n", p->p_numthreads); 506 FOREACH_THREAD_IN_PROC(p, td) { 507 dumpthread(p, td, 1); 508 if (db_pager_quit) 509 break; 510 } 511 } 512 513 void 514 db_findstack_cmd(db_expr_t addr, bool have_addr, db_expr_t dummy3 __unused, 515 char *dummy4 __unused) 516 { 517 struct thread *td; 518 vm_offset_t saddr; 519 520 if (have_addr) 521 saddr = addr; 522 else { 523 db_printf("Usage: findstack <address>\n"); 524 return; 525 } 526 527 for (td = kdb_thr_first(); td != NULL; td = kdb_thr_next(td)) { 528 if (kstack_contains(td, saddr, 1)) { 529 db_printf("Thread %p\n", td); 530 return; 531 } 532 } 533 }
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