1 /*- 2 * Mach Operating System 3 * Copyright (c) 1991,1990 Carnegie Mellon University 4 * All Rights Reserved. 5 * 6 * Permission to use, copy, modify and distribute this software and its 7 * documentation is hereby granted, provided that both the copyright 8 * notice and this permission notice appear in all copies of the 9 * software, derivative works or modified versions, and any portions 10 * thereof, and that both notices appear in supporting documentation. 11 * 12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS 13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 15 * 16 * Carnegie Mellon requests users of this software to return to 17 * 18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 19 * School of Computer Science 20 * Carnegie Mellon University 21 * Pittsburgh PA 15213-3890 22 * 23 * any improvements or extensions that they make and grant Carnegie the 24 * rights to redistribute these changes. 25 */ 26 /* 27 * Author: David B. Golub, Carnegie Mellon University 28 * Date: 7/90 29 */ 30 /* 31 * Command dispatcher. 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include <sys/param.h> 38 #include <sys/linker_set.h> 39 #include <sys/lock.h> 40 #include <sys/kdb.h> 41 #include <sys/mutex.h> 42 #include <sys/proc.h> 43 #include <sys/reboot.h> 44 #include <sys/signalvar.h> 45 #include <sys/systm.h> 46 #include <sys/cons.h> 47 #include <sys/conf.h> 48 #include <sys/watchdog.h> 49 #include <sys/kernel.h> 50 51 #include <ddb/ddb.h> 52 #include <ddb/db_command.h> 53 #include <ddb/db_lex.h> 54 #include <ddb/db_output.h> 55 56 #include <machine/cpu.h> 57 #include <machine/setjmp.h> 58 59 /* 60 * Exported global variables 61 */ 62 bool db_cmd_loop_done; 63 db_addr_t db_dot; 64 db_addr_t db_last_addr; 65 db_addr_t db_prev; 66 db_addr_t db_next; 67 68 static db_cmdfcn_t db_dump; 69 static db_cmdfcn_t db_fncall; 70 static db_cmdfcn_t db_gdb; 71 static db_cmdfcn_t db_halt; 72 static db_cmdfcn_t db_kill; 73 static db_cmdfcn_t db_reset; 74 static db_cmdfcn_t db_stack_trace; 75 static db_cmdfcn_t db_stack_trace_all; 76 static db_cmdfcn_t db_watchdog; 77 78 /* 79 * 'show' commands 80 */ 81 82 static struct command db_show_all_cmds[] = { 83 { "trace", db_stack_trace_all, 0, NULL }, 84 }; 85 struct command_table db_show_all_table = 86 LIST_HEAD_INITIALIZER(db_show_all_table); 87 88 static struct command db_show_cmds[] = { 89 { "all", 0, 0, &db_show_all_table }, 90 { "registers", db_show_regs, 0, NULL }, 91 { "breaks", db_listbreak_cmd, 0, NULL }, 92 { "threads", db_show_threads, 0, NULL }, 93 }; 94 struct command_table db_show_table = LIST_HEAD_INITIALIZER(db_show_table); 95 96 static struct command db_cmds[] = { 97 { "print", db_print_cmd, 0, NULL }, 98 { "p", db_print_cmd, 0, NULL }, 99 { "examine", db_examine_cmd, CS_SET_DOT, NULL }, 100 { "x", db_examine_cmd, CS_SET_DOT, NULL }, 101 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, 102 { "set", db_set_cmd, CS_OWN, NULL }, 103 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 104 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 105 { "delete", db_delete_cmd, 0, NULL }, 106 { "d", db_delete_cmd, 0, NULL }, 107 { "dump", db_dump, 0, NULL }, 108 { "break", db_breakpoint_cmd, 0, NULL }, 109 { "b", db_breakpoint_cmd, 0, NULL }, 110 { "dwatch", db_deletewatch_cmd, 0, NULL }, 111 { "watch", db_watchpoint_cmd, CS_MORE,NULL }, 112 { "dhwatch", db_deletehwatch_cmd, 0, NULL }, 113 { "hwatch", db_hwatchpoint_cmd, 0, NULL }, 114 { "step", db_single_step_cmd, 0, NULL }, 115 { "s", db_single_step_cmd, 0, NULL }, 116 { "continue", db_continue_cmd, 0, NULL }, 117 { "c", db_continue_cmd, 0, NULL }, 118 { "until", db_trace_until_call_cmd,0, NULL }, 119 { "next", db_trace_until_matching_cmd,0, NULL }, 120 { "match", db_trace_until_matching_cmd,0, NULL }, 121 { "trace", db_stack_trace, CS_OWN, NULL }, 122 { "t", db_stack_trace, CS_OWN, NULL }, 123 /* XXX alias for all trace */ 124 { "alltrace", db_stack_trace_all, 0, NULL }, 125 { "where", db_stack_trace, CS_OWN, NULL }, 126 { "bt", db_stack_trace, CS_OWN, NULL }, 127 { "call", db_fncall, CS_OWN, NULL }, 128 { "show", 0, 0, &db_show_table }, 129 { "ps", db_ps, 0, NULL }, 130 { "gdb", db_gdb, 0, NULL }, 131 { "halt", db_halt, 0, NULL }, 132 { "reboot", db_reset, 0, NULL }, 133 { "reset", db_reset, 0, NULL }, 134 { "kill", db_kill, CS_OWN, NULL }, 135 { "watchdog", db_watchdog, CS_OWN, NULL }, 136 { "thread", db_set_thread, CS_OWN, NULL }, 137 { "run", db_run_cmd, CS_OWN, NULL }, 138 { "script", db_script_cmd, CS_OWN, NULL }, 139 { "scripts", db_scripts_cmd, 0, NULL }, 140 { "unscript", db_unscript_cmd, CS_OWN, NULL }, 141 { "capture", db_capture_cmd, CS_OWN, NULL }, 142 { "textdump", db_textdump_cmd, CS_OWN, NULL }, 143 { "findstack", db_findstack_cmd, 0, NULL }, 144 }; 145 struct command_table db_cmd_table = LIST_HEAD_INITIALIZER(db_cmd_table); 146 147 static struct command *db_last_command = 0; 148 149 /* 150 * if 'ed' style: 'dot' is set at start of last item printed, 151 * and '+' points to next line. 152 * Otherwise: 'dot' points to next item, '..' points to last. 153 */ 154 static bool db_ed_style = true; 155 156 /* 157 * Utility routine - discard tokens through end-of-line. 158 */ 159 void 160 db_skip_to_eol(void) 161 { 162 int t; 163 do { 164 t = db_read_token(); 165 } while (t != tEOL); 166 } 167 168 /* 169 * Results of command search. 170 */ 171 #define CMD_UNIQUE 0 172 #define CMD_FOUND 1 173 #define CMD_NONE 2 174 #define CMD_AMBIGUOUS 3 175 #define CMD_HELP 4 176 177 static void db_cmd_match(char *name, struct command *cmd, 178 struct command **cmdp, int *resultp); 179 static void db_cmd_list(struct command_table *table); 180 static int db_cmd_search(char *name, struct command_table *table, 181 struct command **cmdp); 182 static void db_command(struct command **last_cmdp, 183 struct command_table *cmd_table, int dopager); 184 185 /* 186 * Initialize the command lists from the static tables. 187 */ 188 void 189 db_command_init(void) 190 { 191 #define N(a) (sizeof(a) / sizeof(a[0])) 192 int i; 193 194 for (i = 0; i < N(db_cmds); i++) 195 db_command_register(&db_cmd_table, &db_cmds[i]); 196 for (i = 0; i < N(db_show_cmds); i++) 197 db_command_register(&db_show_table, &db_show_cmds[i]); 198 for (i = 0; i < N(db_show_all_cmds); i++) 199 db_command_register(&db_show_all_table, &db_show_all_cmds[i]); 200 #undef N 201 } 202 203 /* 204 * Register a command. 205 */ 206 void 207 db_command_register(struct command_table *list, struct command *cmd) 208 { 209 struct command *c, *last; 210 211 last = NULL; 212 LIST_FOREACH(c, list, next) { 213 int n = strcmp(cmd->name, c->name); 214 215 /* Check that the command is not already present. */ 216 if (n == 0) { 217 printf("%s: Warning, the command \"%s\" already exists;" 218 " ignoring request\n", __func__, cmd->name); 219 return; 220 } 221 if (n < 0) { 222 /* NB: keep list sorted lexicographically */ 223 LIST_INSERT_BEFORE(c, cmd, next); 224 return; 225 } 226 last = c; 227 } 228 if (last == NULL) 229 LIST_INSERT_HEAD(list, cmd, next); 230 else 231 LIST_INSERT_AFTER(last, cmd, next); 232 } 233 234 /* 235 * Remove a command previously registered with db_command_register. 236 */ 237 void 238 db_command_unregister(struct command_table *list, struct command *cmd) 239 { 240 struct command *c; 241 242 LIST_FOREACH(c, list, next) { 243 if (cmd == c) { 244 LIST_REMOVE(cmd, next); 245 return; 246 } 247 } 248 /* NB: intentionally quiet */ 249 } 250 251 /* 252 * Helper function to match a single command. 253 */ 254 static void 255 db_cmd_match(char *name, struct command *cmd, struct command **cmdp, 256 int *resultp) 257 { 258 char *lp, *rp; 259 int c; 260 261 lp = name; 262 rp = cmd->name; 263 while ((c = *lp) == *rp) { 264 if (c == 0) { 265 /* complete match */ 266 *cmdp = cmd; 267 *resultp = CMD_UNIQUE; 268 return; 269 } 270 lp++; 271 rp++; 272 } 273 if (c == 0) { 274 /* end of name, not end of command - 275 partial match */ 276 if (*resultp == CMD_FOUND) { 277 *resultp = CMD_AMBIGUOUS; 278 /* but keep looking for a full match - 279 this lets us match single letters */ 280 } else { 281 *cmdp = cmd; 282 *resultp = CMD_FOUND; 283 } 284 } 285 } 286 287 /* 288 * Search for command prefix. 289 */ 290 static int 291 db_cmd_search(char *name, struct command_table *table, struct command **cmdp) 292 { 293 struct command *cmd; 294 int result = CMD_NONE; 295 296 LIST_FOREACH(cmd, table, next) { 297 db_cmd_match(name,cmd,cmdp,&result); 298 if (result == CMD_UNIQUE) 299 break; 300 } 301 302 if (result == CMD_NONE) { 303 /* check for 'help' */ 304 if (name[0] == 'h' && name[1] == 'e' 305 && name[2] == 'l' && name[3] == 'p') 306 result = CMD_HELP; 307 } 308 return (result); 309 } 310 311 static void 312 db_cmd_list(struct command_table *table) 313 { 314 struct command *cmd; 315 316 LIST_FOREACH(cmd, table, next) { 317 db_printf("%-16s", cmd->name); 318 db_end_line(16); 319 } 320 } 321 322 static void 323 db_command(struct command **last_cmdp, struct command_table *cmd_table, 324 int dopager) 325 { 326 struct command *cmd = NULL; 327 int t; 328 char modif[TOK_STRING_SIZE]; 329 db_expr_t addr, count; 330 bool have_addr = false; 331 int result; 332 333 t = db_read_token(); 334 if (t == tEOL) { 335 /* empty line repeats last command, at 'next' */ 336 cmd = *last_cmdp; 337 addr = (db_expr_t)db_next; 338 have_addr = false; 339 count = 1; 340 modif[0] = '\0'; 341 } 342 else if (t == tEXCL) { 343 db_fncall((db_expr_t)0, (bool)false, (db_expr_t)0, (char *)0); 344 return; 345 } 346 else if (t != tIDENT) { 347 db_printf("?\n"); 348 db_flush_lex(); 349 return; 350 } 351 else { 352 /* 353 * Search for command 354 */ 355 while (cmd_table) { 356 result = db_cmd_search(db_tok_string, 357 cmd_table, 358 &cmd); 359 switch (result) { 360 case CMD_NONE: 361 db_printf("No such command\n"); 362 db_flush_lex(); 363 return; 364 case CMD_AMBIGUOUS: 365 db_printf("Ambiguous\n"); 366 db_flush_lex(); 367 return; 368 case CMD_HELP: 369 db_cmd_list(cmd_table); 370 db_flush_lex(); 371 return; 372 default: 373 break; 374 } 375 if ((cmd_table = cmd->more) != NULL) { 376 t = db_read_token(); 377 if (t != tIDENT) { 378 db_cmd_list(cmd_table); 379 db_flush_lex(); 380 return; 381 } 382 } 383 } 384 385 if ((cmd->flag & CS_OWN) == 0) { 386 /* 387 * Standard syntax: 388 * command [/modifier] [addr] [,count] 389 */ 390 t = db_read_token(); 391 if (t == tSLASH) { 392 t = db_read_token(); 393 if (t != tIDENT) { 394 db_printf("Bad modifier\n"); 395 db_flush_lex(); 396 return; 397 } 398 db_strcpy(modif, db_tok_string); 399 } 400 else { 401 db_unread_token(t); 402 modif[0] = '\0'; 403 } 404 405 if (db_expression(&addr)) { 406 db_dot = (db_addr_t) addr; 407 db_last_addr = db_dot; 408 have_addr = true; 409 } 410 else { 411 addr = (db_expr_t) db_dot; 412 have_addr = false; 413 } 414 t = db_read_token(); 415 if (t == tCOMMA) { 416 if (!db_expression(&count)) { 417 db_printf("Count missing\n"); 418 db_flush_lex(); 419 return; 420 } 421 } 422 else { 423 db_unread_token(t); 424 count = -1; 425 } 426 if ((cmd->flag & CS_MORE) == 0) { 427 db_skip_to_eol(); 428 } 429 } 430 } 431 *last_cmdp = cmd; 432 if (cmd != 0) { 433 /* 434 * Execute the command. 435 */ 436 if (dopager) 437 db_enable_pager(); 438 else 439 db_disable_pager(); 440 (*cmd->fcn)(addr, have_addr, count, modif); 441 if (dopager) 442 db_disable_pager(); 443 444 if (cmd->flag & CS_SET_DOT) { 445 /* 446 * If command changes dot, set dot to 447 * previous address displayed (if 'ed' style). 448 */ 449 if (db_ed_style) { 450 db_dot = db_prev; 451 } 452 else { 453 db_dot = db_next; 454 } 455 } 456 else { 457 /* 458 * If command does not change dot, 459 * set 'next' location to be the same. 460 */ 461 db_next = db_dot; 462 } 463 } 464 } 465 466 /* 467 * At least one non-optional command must be implemented using 468 * DB_COMMAND() so that db_cmd_set gets created. Here is one. 469 */ 470 DB_COMMAND(panic, db_panic) 471 { 472 db_disable_pager(); 473 panic("from debugger"); 474 } 475 476 void 477 db_command_loop(void) 478 { 479 /* 480 * Initialize 'prev' and 'next' to dot. 481 */ 482 db_prev = db_dot; 483 db_next = db_dot; 484 485 db_cmd_loop_done = 0; 486 while (!db_cmd_loop_done) { 487 if (db_print_position() != 0) 488 db_printf("\n"); 489 490 db_printf("db> "); 491 (void) db_read_line(); 492 493 db_command(&db_last_command, &db_cmd_table, /* dopager */ 1); 494 } 495 } 496 497 /* 498 * Execute a command on behalf of a script. The caller is responsible for 499 * making sure that the command string is < DB_MAXLINE or it will be 500 * truncated. 501 * 502 * XXXRW: Runs by injecting faked input into DDB input stream; it would be 503 * nicer to use an alternative approach that didn't mess with the previous 504 * command buffer. 505 */ 506 void 507 db_command_script(const char *command) 508 { 509 db_prev = db_next = db_dot; 510 db_inject_line(command); 511 db_command(&db_last_command, &db_cmd_table, /* dopager */ 0); 512 } 513 514 void 515 db_error(const char *s) 516 { 517 if (s) 518 db_printf("%s", s); 519 db_flush_lex(); 520 kdb_reenter(); 521 } 522 523 static void 524 db_dump(db_expr_t dummy, bool dummy2, db_expr_t dummy3, char *dummy4) 525 { 526 int error; 527 528 if (textdump_pending) { 529 db_printf("textdump_pending set.\n" 530 "run \"textdump unset\" first or \"textdump dump\" for a textdump.\n"); 531 return; 532 } 533 error = doadump(false); 534 if (error) { 535 db_printf("Cannot dump: "); 536 switch (error) { 537 case EBUSY: 538 db_printf("debugger got invoked while dumping.\n"); 539 break; 540 case ENXIO: 541 db_printf("no dump device specified.\n"); 542 break; 543 default: 544 db_printf("unknown error (error=%d).\n", error); 545 break; 546 } 547 } 548 } 549 550 /* 551 * Call random function: 552 * !expr(arg,arg,arg) 553 */ 554 555 /* The generic implementation supports a maximum of 10 arguments. */ 556 typedef db_expr_t __db_f(db_expr_t, db_expr_t, db_expr_t, db_expr_t, 557 db_expr_t, db_expr_t, db_expr_t, db_expr_t, db_expr_t, db_expr_t); 558 559 static __inline int 560 db_fncall_generic(db_expr_t addr, db_expr_t *rv, int nargs, db_expr_t args[]) 561 { 562 __db_f *f = (__db_f *)addr; 563 564 if (nargs > 10) { 565 db_printf("Too many arguments (max 10)\n"); 566 return (0); 567 } 568 *rv = (*f)(args[0], args[1], args[2], args[3], args[4], args[5], 569 args[6], args[7], args[8], args[9]); 570 return (1); 571 } 572 573 static void 574 db_fncall(db_expr_t dummy1, bool dummy2, db_expr_t dummy3, char *dummy4) 575 { 576 db_expr_t fn_addr; 577 db_expr_t args[DB_MAXARGS]; 578 int nargs = 0; 579 db_expr_t retval; 580 int t; 581 582 if (!db_expression(&fn_addr)) { 583 db_printf("Bad function\n"); 584 db_flush_lex(); 585 return; 586 } 587 588 t = db_read_token(); 589 if (t == tLPAREN) { 590 if (db_expression(&args[0])) { 591 nargs++; 592 while ((t = db_read_token()) == tCOMMA) { 593 if (nargs == DB_MAXARGS) { 594 db_printf("Too many arguments (max %d)\n", DB_MAXARGS); 595 db_flush_lex(); 596 return; 597 } 598 if (!db_expression(&args[nargs])) { 599 db_printf("Argument missing\n"); 600 db_flush_lex(); 601 return; 602 } 603 nargs++; 604 } 605 db_unread_token(t); 606 } 607 if (db_read_token() != tRPAREN) { 608 db_printf("?\n"); 609 db_flush_lex(); 610 return; 611 } 612 } 613 db_skip_to_eol(); 614 db_disable_pager(); 615 616 if (DB_CALL(fn_addr, &retval, nargs, args)) 617 db_printf("= %#lr\n", (long)retval); 618 } 619 620 static void 621 db_halt(db_expr_t dummy, bool dummy2, db_expr_t dummy3, char *dummy4) 622 { 623 624 cpu_halt(); 625 } 626 627 static void 628 db_kill(db_expr_t dummy1, bool dummy2, db_expr_t dummy3, char *dummy4) 629 { 630 db_expr_t old_radix, pid, sig; 631 struct proc *p; 632 633 #define DB_ERROR(f) do { db_printf f; db_flush_lex(); goto out; } while (0) 634 635 /* 636 * PIDs and signal numbers are typically represented in base 637 * 10, so make that the default here. It can, of course, be 638 * overridden by specifying a prefix. 639 */ 640 old_radix = db_radix; 641 db_radix = 10; 642 /* Retrieve arguments. */ 643 if (!db_expression(&sig)) 644 DB_ERROR(("Missing signal number\n")); 645 if (!db_expression(&pid)) 646 DB_ERROR(("Missing process ID\n")); 647 db_skip_to_eol(); 648 if (!_SIG_VALID(sig)) 649 DB_ERROR(("Signal number out of range\n")); 650 651 /* 652 * Find the process in question. allproc_lock is not needed 653 * since we're in DDB. 654 */ 655 /* sx_slock(&allproc_lock); */ 656 FOREACH_PROC_IN_SYSTEM(p) 657 if (p->p_pid == pid) 658 break; 659 /* sx_sunlock(&allproc_lock); */ 660 if (p == NULL) 661 DB_ERROR(("Can't find process with pid %ld\n", (long) pid)); 662 663 /* If it's already locked, bail; otherwise, do the deed. */ 664 if (PROC_TRYLOCK(p) == 0) 665 DB_ERROR(("Can't lock process with pid %ld\n", (long) pid)); 666 else { 667 pksignal(p, sig, NULL); 668 PROC_UNLOCK(p); 669 } 670 671 out: 672 db_radix = old_radix; 673 #undef DB_ERROR 674 } 675 676 /* 677 * Reboot. In case there is an additional argument, take it as delay in 678 * seconds. Default to 15s if we cannot parse it and make sure we will 679 * never wait longer than 1 week. Some code is similar to 680 * kern_shutdown.c:shutdown_panic(). 681 */ 682 #ifndef DB_RESET_MAXDELAY 683 #define DB_RESET_MAXDELAY (3600 * 24 * 7) 684 #endif 685 686 static void 687 db_reset(db_expr_t addr, bool have_addr, db_expr_t count __unused, 688 char *modif __unused) 689 { 690 int delay, loop; 691 692 if (have_addr) { 693 delay = (int)db_hex2dec(addr); 694 695 /* If we parse to fail, use 15s. */ 696 if (delay == -1) 697 delay = 15; 698 699 /* Cap at one week. */ 700 if ((uintmax_t)delay > (uintmax_t)DB_RESET_MAXDELAY) 701 delay = DB_RESET_MAXDELAY; 702 703 db_printf("Automatic reboot in %d seconds - " 704 "press a key on the console to abort\n", delay); 705 for (loop = delay * 10; loop > 0; --loop) { 706 DELAY(1000 * 100); /* 1/10th second */ 707 /* Did user type a key? */ 708 if (cncheckc() != -1) 709 return; 710 } 711 } 712 713 cpu_reset(); 714 } 715 716 static void 717 db_watchdog(db_expr_t dummy1, bool dummy2, db_expr_t dummy3, char *dummy4) 718 { 719 db_expr_t old_radix, tout; 720 int err, i; 721 722 old_radix = db_radix; 723 db_radix = 10; 724 err = db_expression(&tout); 725 db_skip_to_eol(); 726 db_radix = old_radix; 727 728 /* If no argument is provided the watchdog will just be disabled. */ 729 if (err == 0) { 730 db_printf("No argument provided, disabling watchdog\n"); 731 tout = 0; 732 } else if ((tout & WD_INTERVAL) == WD_TO_NEVER) { 733 db_error("Out of range watchdog interval\n"); 734 return; 735 } 736 EVENTHANDLER_INVOKE(watchdog_list, tout, &i); 737 } 738 739 static void 740 db_gdb(db_expr_t dummy1, bool dummy2, db_expr_t dummy3, char *dummy4) 741 { 742 743 if (kdb_dbbe_select("gdb") != 0) { 744 db_printf("The remote GDB backend could not be selected.\n"); 745 return; 746 } 747 /* 748 * Mark that we are done in the debugger. kdb_trap() 749 * should re-enter with the new backend. 750 */ 751 db_cmd_loop_done = 1; 752 db_printf("(ctrl-c will return control to ddb)\n"); 753 } 754 755 static void 756 db_stack_trace(db_expr_t tid, bool hastid, db_expr_t count, char *modif) 757 { 758 struct thread *td; 759 db_expr_t radix; 760 pid_t pid; 761 int t; 762 763 /* 764 * We parse our own arguments. We don't like the default radix. 765 */ 766 radix = db_radix; 767 db_radix = 10; 768 hastid = db_expression(&tid); 769 t = db_read_token(); 770 if (t == tCOMMA) { 771 if (!db_expression(&count)) { 772 db_printf("Count missing\n"); 773 db_flush_lex(); 774 return; 775 } 776 } else { 777 db_unread_token(t); 778 count = -1; 779 } 780 db_skip_to_eol(); 781 db_radix = radix; 782 783 if (hastid) { 784 td = kdb_thr_lookup((lwpid_t)tid); 785 if (td == NULL) 786 td = kdb_thr_from_pid((pid_t)tid); 787 if (td == NULL) { 788 db_printf("Thread %d not found\n", (int)tid); 789 return; 790 } 791 } else 792 td = kdb_thread; 793 if (td->td_proc != NULL) 794 pid = td->td_proc->p_pid; 795 else 796 pid = -1; 797 db_printf("Tracing pid %d tid %ld td %p\n", pid, (long)td->td_tid, td); 798 db_trace_thread(td, count); 799 } 800 801 static void 802 db_stack_trace_all(db_expr_t dummy, bool dummy2, db_expr_t dummy3, 803 char *dummy4) 804 { 805 struct proc *p; 806 struct thread *td; 807 jmp_buf jb; 808 void *prev_jb; 809 810 FOREACH_PROC_IN_SYSTEM(p) { 811 prev_jb = kdb_jmpbuf(jb); 812 if (setjmp(jb) == 0) { 813 FOREACH_THREAD_IN_PROC(p, td) { 814 db_printf("\nTracing command %s pid %d tid %ld td %p\n", 815 p->p_comm, p->p_pid, (long)td->td_tid, td); 816 db_trace_thread(td, -1); 817 if (db_pager_quit) { 818 kdb_jmpbuf(prev_jb); 819 return; 820 } 821 } 822 } 823 kdb_jmpbuf(prev_jb); 824 } 825 } 826 827 /* 828 * Take the parsed expression value from the command line that was parsed 829 * as a hexadecimal value and convert it as if the expression was parsed 830 * as a decimal value. Returns -1 if the expression was not a valid 831 * decimal value. 832 */ 833 db_expr_t 834 db_hex2dec(db_expr_t expr) 835 { 836 uintptr_t x, y; 837 db_expr_t val; 838 839 y = 1; 840 val = 0; 841 x = expr; 842 while (x != 0) { 843 if (x % 16 > 9) 844 return (-1); 845 val += (x % 16) * (y); 846 x >>= 4; 847 y *= 10; 848 } 849 return (val); 850 } 851