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
Version:
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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: releng/7.4/sys/ddb/db_ps.c 178509 2008-04-25 16:50:48Z sam $"); 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 * At least one non-optional show-command must be implemented using 51 * DB_SHOW_ALL_COMMAND() so that db_show_all_cmd_set gets created. 52 * Here is one. 53 */ 54 DB_SHOW_ALL_COMMAND(procs, db_procs_cmd) 55 { 56 db_ps(addr, have_addr, count, modif); 57 } 58 59 /* 60 * Layout: 61 * - column counts 62 * - header 63 * - single-threaded process 64 * - multi-threaded process 65 * - thread in a MT process 66 * 67 * 1 2 3 4 5 6 7 68 * 1234567890123456789012345678901234567890123456789012345678901234567890 69 * pid ppid pgrp uid state wmesg wchan cmd 70 * <pid> <ppi> <pgi> <uid> <stat> < wmesg > < wchan > <name> 71 * <pid> <ppi> <pgi> <uid> <stat> (threaded) <command> 72 * <tid > <stat> < wmesg > < wchan > <name> 73 * 74 * For machines with 64-bit pointers, we expand the wchan field 8 more 75 * characters. 76 */ 77 void 78 db_ps(db_expr_t addr, boolean_t hasaddr, db_expr_t count, char *modif) 79 { 80 volatile struct proc *p, *pp; 81 volatile struct thread *td; 82 struct ucred *cred; 83 struct pgrp *pgrp; 84 char state[9]; 85 int np, rflag, sflag, dflag, lflag, wflag; 86 87 np = nprocs; 88 89 if (!LIST_EMPTY(&allproc)) 90 p = LIST_FIRST(&allproc); 91 else 92 p = &proc0; 93 94 #ifdef __LP64__ 95 db_printf(" pid ppid pgrp uid state wmesg wchan cmd\n"); 96 #else 97 db_printf(" pid ppid pgrp uid state wmesg wchan cmd\n"); 98 #endif 99 while (--np >= 0 && !db_pager_quit) { 100 if (p == NULL) { 101 db_printf("oops, ran out of processes early!\n"); 102 break; 103 } 104 pp = p->p_pptr; 105 if (pp == NULL) 106 pp = p; 107 108 cred = p->p_ucred; 109 pgrp = p->p_pgrp; 110 db_printf("%5d %5d %5d %5d ", p->p_pid, pp->p_pid, 111 pgrp != NULL ? pgrp->pg_id : 0, 112 cred != NULL ? cred->cr_ruid : 0); 113 114 /* Determine our primary process state. */ 115 switch (p->p_state) { 116 case PRS_NORMAL: 117 if (P_SHOULDSTOP(p)) 118 state[0] = 'T'; 119 else { 120 /* 121 * One of D, L, R, S, W. For a 122 * multithreaded process we will use 123 * the state of the thread with the 124 * highest precedence. The 125 * precendence order from high to low 126 * is R, L, D, S, W. If no thread is 127 * in a sane state we use '?' for our 128 * primary state. 129 */ 130 rflag = sflag = dflag = lflag = wflag = 0; 131 FOREACH_THREAD_IN_PROC(p, td) { 132 if (td->td_state == TDS_RUNNING || 133 td->td_state == TDS_RUNQ || 134 td->td_state == TDS_CAN_RUN) 135 rflag++; 136 if (TD_ON_LOCK(td)) 137 lflag++; 138 if (TD_IS_SLEEPING(td)) { 139 if (!td->td_flags & TDF_SINTR) 140 dflag++; 141 else 142 sflag++; 143 } 144 if (TD_AWAITING_INTR(td)) 145 wflag++; 146 } 147 if (rflag) 148 state[0] = 'R'; 149 else if (lflag) 150 state[0] = 'L'; 151 else if (dflag) 152 state[0] = 'D'; 153 else if (sflag) 154 state[0] = 'S'; 155 else if (wflag) 156 state[0] = 'W'; 157 else 158 state[0] = '?'; 159 } 160 break; 161 case PRS_NEW: 162 state[0] = 'N'; 163 break; 164 case PRS_ZOMBIE: 165 state[0] = 'Z'; 166 break; 167 default: 168 state[0] = 'U'; 169 break; 170 } 171 state[1] = '\0'; 172 173 /* Additional process state flags. */ 174 if (!p->p_flag & P_INMEM) 175 strlcat(state, "W", sizeof(state)); 176 if (p->p_flag & P_TRACED) 177 strlcat(state, "X", sizeof(state)); 178 if (p->p_flag & P_WEXIT && p->p_state != PRS_ZOMBIE) 179 strlcat(state, "E", sizeof(state)); 180 if (p->p_flag & P_PPWAIT) 181 strlcat(state, "V", sizeof(state)); 182 if (p->p_flag & P_SYSTEM || p->p_lock > 0) 183 strlcat(state, "L", sizeof(state)); 184 if (p->p_session != NULL && SESS_LEADER(p)) 185 strlcat(state, "s", sizeof(state)); 186 /* Cheated here and didn't compare pgid's. */ 187 if (p->p_flag & P_CONTROLT) 188 strlcat(state, "+", sizeof(state)); 189 if (cred != NULL && jailed(cred)) 190 strlcat(state, "J", sizeof(state)); 191 db_printf(" %-6.6s ", state); 192 if (p->p_flag & P_HADTHREADS) 193 #ifdef __LP64__ 194 db_printf(" (threaded) %s\n", 195 p->p_comm); 196 #else 197 db_printf(" (threaded) %s\n", p->p_comm); 198 #endif 199 FOREACH_THREAD_IN_PROC(p, td) { 200 dumpthread(p, td, p->p_flag & P_HADTHREADS); 201 if (db_pager_quit) 202 break; 203 } 204 205 p = LIST_NEXT(p, p_list); 206 if (p == NULL && np > 0) 207 p = LIST_FIRST(&zombproc); 208 } 209 } 210 211 static void 212 dumpthread(volatile struct proc *p, volatile struct thread *td, int all) 213 { 214 char state[9], wprefix; 215 const char *wmesg; 216 void *wchan; 217 218 if (all) { 219 db_printf("%6d ", td->td_tid); 220 switch (td->td_state) { 221 case TDS_RUNNING: 222 snprintf(state, sizeof(state), "Run"); 223 break; 224 case TDS_RUNQ: 225 snprintf(state, sizeof(state), "RunQ"); 226 break; 227 case TDS_CAN_RUN: 228 snprintf(state, sizeof(state), "CanRun"); 229 break; 230 case TDS_INACTIVE: 231 snprintf(state, sizeof(state), "Inactv"); 232 break; 233 case TDS_INHIBITED: 234 state[0] = '\0'; 235 if (TD_ON_LOCK(td)) 236 strlcat(state, "L", sizeof(state)); 237 if (TD_IS_SLEEPING(td)) { 238 if (td->td_flags & TDF_SINTR) 239 strlcat(state, "S", sizeof(state)); 240 else 241 strlcat(state, "D", sizeof(state)); 242 } 243 if (TD_IS_SWAPPED(td)) 244 strlcat(state, "W", sizeof(state)); 245 if (TD_AWAITING_INTR(td)) 246 strlcat(state, "I", sizeof(state)); 247 if (TD_IS_SUSPENDED(td)) 248 strlcat(state, "s", sizeof(state)); 249 if (state[0] != '\0') 250 break; 251 default: 252 snprintf(state, sizeof(state), "???"); 253 } 254 db_printf(" %-6.6s ", state); 255 } 256 wprefix = ' '; 257 if (TD_ON_LOCK(td)) { 258 wprefix = '*'; 259 wmesg = td->td_lockname; 260 wchan = td->td_blocked; 261 } else if (TD_ON_SLEEPQ(td)) { 262 wmesg = td->td_wmesg; 263 wchan = td->td_wchan; 264 } else if (TD_IS_RUNNING(td)) { 265 snprintf(state, sizeof(state), "CPU %d", td->td_oncpu); 266 wmesg = state; 267 wchan = NULL; 268 } else { 269 wmesg = ""; 270 wchan = NULL; 271 } 272 db_printf("%c%-8.8s ", wprefix, wmesg); 273 if (wchan == NULL) 274 #ifdef __LP64__ 275 db_printf("%18s ", ""); 276 #else 277 db_printf("%10s ", ""); 278 #endif 279 else 280 db_printf("%p ", wchan); 281 if (p->p_flag & P_SYSTEM) 282 db_printf("["); 283 if (td->td_name[0] != '\0') 284 db_printf("%s", td->td_name); 285 else 286 db_printf("%s", td->td_proc->p_comm); 287 if (p->p_flag & P_SYSTEM) 288 db_printf("]"); 289 db_printf("\n"); 290 } 291 292 DB_SHOW_COMMAND(thread, db_show_thread) 293 { 294 struct thread *td; 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; 302 303 db_printf("Thread %d at %p:\n", td->td_tid, td); 304 db_printf(" proc (pid %d): %p\n", td->td_proc->p_pid, td->td_proc); 305 if (td->td_name[0] != '\0') 306 db_printf(" name: %s\n", td->td_name); 307 db_printf(" flags: %#x ", td->td_flags); 308 db_printf(" pflags: %#x\n", td->td_pflags); 309 db_printf(" state: "); 310 switch (td->td_state) { 311 case TDS_INACTIVE: 312 db_printf("INACTIVE\n"); 313 break; 314 case TDS_CAN_RUN: 315 db_printf("CAN RUN\n"); 316 break; 317 case TDS_RUNQ: 318 db_printf("RUNQ\n"); 319 break; 320 case TDS_RUNNING: 321 db_printf("RUNNING (CPU %d)\n", td->td_oncpu); 322 break; 323 case TDS_INHIBITED: 324 db_printf("INHIBITED: {"); 325 comma = FALSE; 326 if (TD_IS_SLEEPING(td)) { 327 db_printf("SLEEPING"); 328 comma = TRUE; 329 } 330 if (TD_IS_SUSPENDED(td)) { 331 if (comma) 332 db_printf(", "); 333 db_printf("SUSPENDED"); 334 comma = TRUE; 335 } 336 if (TD_IS_SWAPPED(td)) { 337 if (comma) 338 db_printf(", "); 339 db_printf("SWAPPED"); 340 comma = TRUE; 341 } 342 if (TD_ON_LOCK(td)) { 343 if (comma) 344 db_printf(", "); 345 db_printf("LOCK"); 346 comma = TRUE; 347 } 348 if (TD_AWAITING_INTR(td)) { 349 if (comma) 350 db_printf(", "); 351 db_printf("IWAIT"); 352 } 353 db_printf("}\n"); 354 break; 355 default: 356 db_printf("??? (%#x)\n", td->td_state); 357 break; 358 } 359 if (TD_ON_LOCK(td)) 360 db_printf(" lock: %s turnstile: %p\n", td->td_lockname, 361 td->td_blocked); 362 if (TD_ON_SLEEPQ(td)) 363 db_printf(" wmesg: %s wchan: %p\n", td->td_wmesg, 364 td->td_wchan); 365 db_printf(" priority: %d\n", td->td_priority); 366 } 367 368 DB_SHOW_COMMAND(proc, db_show_proc) 369 { 370 struct thread *td; 371 struct proc *p; 372 int i; 373 374 /* Determine which process to examine. */ 375 if (have_addr) 376 p = db_lookup_proc(addr); 377 else 378 p = kdb_thread->td_proc; 379 380 db_printf("Process %d (%s) at %p:\n", p->p_pid, p->p_comm, p); 381 db_printf(" state: "); 382 switch (p->p_state) { 383 case PRS_NEW: 384 db_printf("NEW\n"); 385 break; 386 case PRS_NORMAL: 387 db_printf("NORMAL\n"); 388 break; 389 case PRS_ZOMBIE: 390 db_printf("ZOMBIE\n"); 391 break; 392 default: 393 db_printf("??? (%#x)\n", p->p_state); 394 } 395 if (p->p_ucred != NULL) { 396 db_printf(" uid: %d gids: ", p->p_ucred->cr_uid); 397 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 398 db_printf("%d", p->p_ucred->cr_groups[i]); 399 if (i < (p->p_ucred->cr_ngroups - 1)) 400 db_printf(", "); 401 } 402 db_printf("\n"); 403 } 404 if (p->p_pptr != NULL) 405 db_printf(" parent: pid %d at %p\n", p->p_pptr->p_pid, 406 p->p_pptr); 407 if (p->p_leader != NULL && p->p_leader != p) 408 db_printf(" leader: pid %d at %p\n", p->p_leader->p_pid, 409 p->p_leader); 410 if (p->p_sysent != NULL) 411 db_printf(" ABI: %s\n", p->p_sysent->sv_name); 412 if (p->p_args != NULL) 413 db_printf(" arguments: %.*s\n", (int)p->p_args->ar_length, 414 p->p_args->ar_args); 415 db_printf(" threads: %d\n", p->p_numthreads); 416 FOREACH_THREAD_IN_PROC(p, td) { 417 dumpthread(p, td, 1); 418 if (db_pager_quit) 419 break; 420 } 421 }
Cache object: b4260fc3dc7c9ecebbe51a39afa604b9
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