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