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 boolean_t 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, 0 }, 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, 0 }, 91 { "breaks", db_listbreak_cmd, 0, 0 }, 92 { "threads", db_show_threads, 0, 0 }, 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, 0 }, 98 { "p", db_print_cmd, 0, 0 }, 99 { "examine", db_examine_cmd, CS_SET_DOT, 0 }, 100 { "x", db_examine_cmd, CS_SET_DOT, 0 }, 101 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, 0 }, 102 { "set", db_set_cmd, CS_OWN, 0 }, 103 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, 0 }, 104 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, 0 }, 105 { "delete", db_delete_cmd, 0, 0 }, 106 { "d", db_delete_cmd, 0, 0 }, 107 { "dump", db_dump, 0, 0 }, 108 { "break", db_breakpoint_cmd, 0, 0 }, 109 { "b", db_breakpoint_cmd, 0, 0 }, 110 { "dwatch", db_deletewatch_cmd, 0, 0 }, 111 { "watch", db_watchpoint_cmd, CS_MORE,0 }, 112 { "dhwatch", db_deletehwatch_cmd, 0, 0 }, 113 { "hwatch", db_hwatchpoint_cmd, 0, 0 }, 114 { "step", db_single_step_cmd, 0, 0 }, 115 { "s", db_single_step_cmd, 0, 0 }, 116 { "continue", db_continue_cmd, 0, 0 }, 117 { "c", db_continue_cmd, 0, 0 }, 118 { "until", db_trace_until_call_cmd,0, 0 }, 119 { "next", db_trace_until_matching_cmd,0, 0 }, 120 { "match", db_trace_until_matching_cmd,0, 0 }, 121 { "trace", db_stack_trace, CS_OWN, 0 }, 122 { "t", db_stack_trace, CS_OWN, 0 }, 123 /* XXX alias for all trace */ 124 { "alltrace", db_stack_trace_all, 0, 0 }, 125 { "where", db_stack_trace, CS_OWN, 0 }, 126 { "bt", db_stack_trace, CS_OWN, 0 }, 127 { "call", db_fncall, CS_OWN, 0 }, 128 { "show", 0, 0, &db_show_table }, 129 { "ps", db_ps, 0, 0 }, 130 { "gdb", db_gdb, 0, 0 }, 131 { "halt", db_halt, 0, 0 }, 132 { "reboot", db_reset, 0, 0 }, 133 { "reset", db_reset, 0, 0 }, 134 { "kill", db_kill, CS_OWN, 0 }, 135 { "watchdog", db_watchdog, CS_OWN, 0 }, 136 { "thread", db_set_thread, CS_OWN, 0 }, 137 { "run", db_run_cmd, CS_OWN, 0 }, 138 { "script", db_script_cmd, CS_OWN, 0 }, 139 { "scripts", db_scripts_cmd, 0, 0 }, 140 { "unscript", db_unscript_cmd, CS_OWN, 0 }, 141 { "capture", db_capture_cmd, CS_OWN, 0 }, 142 { "textdump", db_textdump_cmd, CS_OWN, 0 }, 143 { "findstack", db_findstack_cmd, 0, 0 }, 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 boolean_t db_ed_style = TRUE; 155 156 /* 157 * Utility routine - discard tokens through end-of-line. 158 */ 159 void 160 db_skip_to_eol() 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(name, cmd, cmdp, resultp) 256 char * name; 257 struct command *cmd; 258 struct command **cmdp; /* out */ 259 int * resultp; 260 { 261 char *lp, *rp; 262 int c; 263 264 lp = name; 265 rp = cmd->name; 266 while ((c = *lp) == *rp) { 267 if (c == 0) { 268 /* complete match */ 269 *cmdp = cmd; 270 *resultp = CMD_UNIQUE; 271 return; 272 } 273 lp++; 274 rp++; 275 } 276 if (c == 0) { 277 /* end of name, not end of command - 278 partial match */ 279 if (*resultp == CMD_FOUND) { 280 *resultp = CMD_AMBIGUOUS; 281 /* but keep looking for a full match - 282 this lets us match single letters */ 283 } else { 284 *cmdp = cmd; 285 *resultp = CMD_FOUND; 286 } 287 } 288 } 289 290 /* 291 * Search for command prefix. 292 */ 293 static int 294 db_cmd_search(name, table, cmdp) 295 char * name; 296 struct command_table *table; 297 struct command **cmdp; /* out */ 298 { 299 struct command *cmd; 300 int result = CMD_NONE; 301 302 LIST_FOREACH(cmd, table, next) { 303 db_cmd_match(name,cmd,cmdp,&result); 304 if (result == CMD_UNIQUE) 305 break; 306 } 307 308 if (result == CMD_NONE) { 309 /* check for 'help' */ 310 if (name[0] == 'h' && name[1] == 'e' 311 && name[2] == 'l' && name[3] == 'p') 312 result = CMD_HELP; 313 } 314 return (result); 315 } 316 317 static void 318 db_cmd_list(table) 319 struct command_table *table; 320 { 321 register struct command *cmd; 322 323 LIST_FOREACH(cmd, table, next) { 324 db_printf("%-12s", cmd->name); 325 db_end_line(12); 326 } 327 } 328 329 static void 330 db_command(last_cmdp, cmd_table, dopager) 331 struct command **last_cmdp; /* IN_OUT */ 332 struct command_table *cmd_table; 333 int dopager; 334 { 335 struct command *cmd = NULL; 336 int t; 337 char modif[TOK_STRING_SIZE]; 338 db_expr_t addr, count; 339 boolean_t have_addr = FALSE; 340 int result; 341 342 t = db_read_token(); 343 if (t == tEOL) { 344 /* empty line repeats last command, at 'next' */ 345 cmd = *last_cmdp; 346 addr = (db_expr_t)db_next; 347 have_addr = FALSE; 348 count = 1; 349 modif[0] = '\0'; 350 } 351 else if (t == tEXCL) { 352 db_fncall((db_expr_t)0, (boolean_t)0, (db_expr_t)0, (char *)0); 353 return; 354 } 355 else if (t != tIDENT) { 356 db_printf("?\n"); 357 db_flush_lex(); 358 return; 359 } 360 else { 361 /* 362 * Search for command 363 */ 364 while (cmd_table) { 365 result = db_cmd_search(db_tok_string, 366 cmd_table, 367 &cmd); 368 switch (result) { 369 case CMD_NONE: 370 db_printf("No such command\n"); 371 db_flush_lex(); 372 return; 373 case CMD_AMBIGUOUS: 374 db_printf("Ambiguous\n"); 375 db_flush_lex(); 376 return; 377 case CMD_HELP: 378 db_cmd_list(cmd_table); 379 db_flush_lex(); 380 return; 381 default: 382 break; 383 } 384 if ((cmd_table = cmd->more) != NULL) { 385 t = db_read_token(); 386 if (t != tIDENT) { 387 db_cmd_list(cmd_table); 388 db_flush_lex(); 389 return; 390 } 391 } 392 } 393 394 if ((cmd->flag & CS_OWN) == 0) { 395 /* 396 * Standard syntax: 397 * command [/modifier] [addr] [,count] 398 */ 399 t = db_read_token(); 400 if (t == tSLASH) { 401 t = db_read_token(); 402 if (t != tIDENT) { 403 db_printf("Bad modifier\n"); 404 db_flush_lex(); 405 return; 406 } 407 db_strcpy(modif, db_tok_string); 408 } 409 else { 410 db_unread_token(t); 411 modif[0] = '\0'; 412 } 413 414 if (db_expression(&addr)) { 415 db_dot = (db_addr_t) addr; 416 db_last_addr = db_dot; 417 have_addr = TRUE; 418 } 419 else { 420 addr = (db_expr_t) db_dot; 421 have_addr = FALSE; 422 } 423 t = db_read_token(); 424 if (t == tCOMMA) { 425 if (!db_expression(&count)) { 426 db_printf("Count missing\n"); 427 db_flush_lex(); 428 return; 429 } 430 } 431 else { 432 db_unread_token(t); 433 count = -1; 434 } 435 if ((cmd->flag & CS_MORE) == 0) { 436 db_skip_to_eol(); 437 } 438 } 439 } 440 *last_cmdp = cmd; 441 if (cmd != 0) { 442 /* 443 * Execute the command. 444 */ 445 if (dopager) 446 db_enable_pager(); 447 else 448 db_disable_pager(); 449 (*cmd->fcn)(addr, have_addr, count, modif); 450 if (dopager) 451 db_disable_pager(); 452 453 if (cmd->flag & CS_SET_DOT) { 454 /* 455 * If command changes dot, set dot to 456 * previous address displayed (if 'ed' style). 457 */ 458 if (db_ed_style) { 459 db_dot = db_prev; 460 } 461 else { 462 db_dot = db_next; 463 } 464 } 465 else { 466 /* 467 * If command does not change dot, 468 * set 'next' location to be the same. 469 */ 470 db_next = db_dot; 471 } 472 } 473 } 474 475 /* 476 * At least one non-optional command must be implemented using 477 * DB_COMMAND() so that db_cmd_set gets created. Here is one. 478 */ 479 DB_COMMAND(panic, db_panic) 480 { 481 db_disable_pager(); 482 panic("from debugger"); 483 } 484 485 void 486 db_command_loop() 487 { 488 /* 489 * Initialize 'prev' and 'next' to dot. 490 */ 491 db_prev = db_dot; 492 db_next = db_dot; 493 494 db_cmd_loop_done = 0; 495 while (!db_cmd_loop_done) { 496 if (db_print_position() != 0) 497 db_printf("\n"); 498 499 db_printf("db> "); 500 (void) db_read_line(); 501 502 db_command(&db_last_command, &db_cmd_table, /* dopager */ 1); 503 } 504 } 505 506 /* 507 * Execute a command on behalf of a script. The caller is responsible for 508 * making sure that the command string is < DB_MAXLINE or it will be 509 * truncated. 510 * 511 * XXXRW: Runs by injecting faked input into DDB input stream; it would be 512 * nicer to use an alternative approach that didn't mess with the previous 513 * command buffer. 514 */ 515 void 516 db_command_script(const char *command) 517 { 518 db_prev = db_next = db_dot; 519 db_inject_line(command); 520 db_command(&db_last_command, &db_cmd_table, /* dopager */ 0); 521 } 522 523 void 524 db_error(s) 525 const char *s; 526 { 527 if (s) 528 db_printf("%s", s); 529 db_flush_lex(); 530 kdb_reenter(); 531 } 532 533 static void 534 db_dump(db_expr_t dummy, boolean_t dummy2, db_expr_t dummy3, char *dummy4) 535 { 536 int error; 537 538 error = doadump(FALSE); 539 if (error) { 540 db_printf("Cannot dump: "); 541 switch (error) { 542 case EBUSY: 543 db_printf("debugger got invoked while dumping.\n"); 544 break; 545 case ENXIO: 546 db_printf("no dump device specified.\n"); 547 break; 548 default: 549 db_printf("unknown error (error=%d).\n", error); 550 break; 551 } 552 } 553 } 554 555 /* 556 * Call random function: 557 * !expr(arg,arg,arg) 558 */ 559 560 /* The generic implementation supports a maximum of 10 arguments. */ 561 typedef db_expr_t __db_f(db_expr_t, db_expr_t, db_expr_t, db_expr_t, 562 db_expr_t, db_expr_t, db_expr_t, db_expr_t, db_expr_t, db_expr_t); 563 564 static __inline int 565 db_fncall_generic(db_expr_t addr, db_expr_t *rv, int nargs, db_expr_t args[]) 566 { 567 __db_f *f = (__db_f *)addr; 568 569 if (nargs > 10) { 570 db_printf("Too many arguments (max 10)\n"); 571 return (0); 572 } 573 *rv = (*f)(args[0], args[1], args[2], args[3], args[4], args[5], 574 args[6], args[7], args[8], args[9]); 575 return (1); 576 } 577 578 static void 579 db_fncall(dummy1, dummy2, dummy3, dummy4) 580 db_expr_t dummy1; 581 boolean_t dummy2; 582 db_expr_t dummy3; 583 char * dummy4; 584 { 585 db_expr_t fn_addr; 586 db_expr_t args[DB_MAXARGS]; 587 int nargs = 0; 588 db_expr_t retval; 589 int t; 590 591 if (!db_expression(&fn_addr)) { 592 db_printf("Bad function\n"); 593 db_flush_lex(); 594 return; 595 } 596 597 t = db_read_token(); 598 if (t == tLPAREN) { 599 if (db_expression(&args[0])) { 600 nargs++; 601 while ((t = db_read_token()) == tCOMMA) { 602 if (nargs == DB_MAXARGS) { 603 db_printf("Too many arguments (max %d)\n", DB_MAXARGS); 604 db_flush_lex(); 605 return; 606 } 607 if (!db_expression(&args[nargs])) { 608 db_printf("Argument missing\n"); 609 db_flush_lex(); 610 return; 611 } 612 nargs++; 613 } 614 db_unread_token(t); 615 } 616 if (db_read_token() != tRPAREN) { 617 db_printf("?\n"); 618 db_flush_lex(); 619 return; 620 } 621 } 622 db_skip_to_eol(); 623 db_disable_pager(); 624 625 if (DB_CALL(fn_addr, &retval, nargs, args)) 626 db_printf("= %#lr\n", (long)retval); 627 } 628 629 static void 630 db_halt(db_expr_t dummy, boolean_t dummy2, db_expr_t dummy3, char *dummy4) 631 { 632 633 cpu_halt(); 634 } 635 636 static void 637 db_kill(dummy1, dummy2, dummy3, dummy4) 638 db_expr_t dummy1; 639 boolean_t dummy2; 640 db_expr_t dummy3; 641 char * dummy4; 642 { 643 db_expr_t old_radix, pid, sig; 644 struct proc *p; 645 646 #define DB_ERROR(f) do { db_printf f; db_flush_lex(); goto out; } while (0) 647 648 /* 649 * PIDs and signal numbers are typically represented in base 650 * 10, so make that the default here. It can, of course, be 651 * overridden by specifying a prefix. 652 */ 653 old_radix = db_radix; 654 db_radix = 10; 655 /* Retrieve arguments. */ 656 if (!db_expression(&sig)) 657 DB_ERROR(("Missing signal number\n")); 658 if (!db_expression(&pid)) 659 DB_ERROR(("Missing process ID\n")); 660 db_skip_to_eol(); 661 if (!_SIG_VALID(sig)) 662 DB_ERROR(("Signal number out of range\n")); 663 664 /* 665 * Find the process in question. allproc_lock is not needed 666 * since we're in DDB. 667 */ 668 /* sx_slock(&allproc_lock); */ 669 FOREACH_PROC_IN_SYSTEM(p) 670 if (p->p_pid == pid) 671 break; 672 /* sx_sunlock(&allproc_lock); */ 673 if (p == NULL) 674 DB_ERROR(("Can't find process with pid %ld\n", (long) pid)); 675 676 /* If it's already locked, bail; otherwise, do the deed. */ 677 if (PROC_TRYLOCK(p) == 0) 678 DB_ERROR(("Can't lock process with pid %ld\n", (long) pid)); 679 else { 680 pksignal(p, sig, NULL); 681 PROC_UNLOCK(p); 682 } 683 684 out: 685 db_radix = old_radix; 686 #undef DB_ERROR 687 } 688 689 /* 690 * Reboot. In case there is an additional argument, take it as delay in 691 * seconds. Default to 15s if we cannot parse it and make sure we will 692 * never wait longer than 1 week. Some code is similar to 693 * kern_shutdown.c:shutdown_panic(). 694 */ 695 #ifndef DB_RESET_MAXDELAY 696 #define DB_RESET_MAXDELAY (3600 * 24 * 7) 697 #endif 698 699 static void 700 db_reset(db_expr_t addr, boolean_t have_addr, db_expr_t count __unused, 701 char *modif __unused) 702 { 703 int delay, loop; 704 705 if (have_addr) { 706 delay = (int)db_hex2dec(addr); 707 708 /* If we parse to fail, use 15s. */ 709 if (delay == -1) 710 delay = 15; 711 712 /* Cap at one week. */ 713 if ((uintmax_t)delay > (uintmax_t)DB_RESET_MAXDELAY) 714 delay = DB_RESET_MAXDELAY; 715 716 db_printf("Automatic reboot in %d seconds - " 717 "press a key on the console to abort\n", delay); 718 for (loop = delay * 10; loop > 0; --loop) { 719 DELAY(1000 * 100); /* 1/10th second */ 720 /* Did user type a key? */ 721 if (cncheckc() != -1) 722 return; 723 } 724 } 725 726 cpu_reset(); 727 } 728 729 static void 730 db_watchdog(dummy1, dummy2, dummy3, dummy4) 731 db_expr_t dummy1; 732 boolean_t dummy2; 733 db_expr_t dummy3; 734 char * dummy4; 735 { 736 db_expr_t old_radix, tout; 737 int err, i; 738 739 old_radix = db_radix; 740 db_radix = 10; 741 err = db_expression(&tout); 742 db_skip_to_eol(); 743 db_radix = old_radix; 744 745 /* If no argument is provided the watchdog will just be disabled. */ 746 if (err == 0) { 747 db_printf("No argument provided, disabling watchdog\n"); 748 tout = 0; 749 } else if ((tout & WD_INTERVAL) == WD_TO_NEVER) { 750 db_error("Out of range watchdog interval\n"); 751 return; 752 } 753 EVENTHANDLER_INVOKE(watchdog_list, tout, &i); 754 } 755 756 static void 757 db_gdb(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, char *dummy4) 758 { 759 760 if (kdb_dbbe_select("gdb") != 0) { 761 db_printf("The remote GDB backend could not be selected.\n"); 762 return; 763 } 764 /* 765 * Mark that we are done in the debugger. kdb_trap() 766 * should re-enter with the new backend. 767 */ 768 db_cmd_loop_done = 1; 769 db_printf("(ctrl-c will return control to ddb)\n"); 770 } 771 772 static void 773 db_stack_trace(db_expr_t tid, boolean_t hastid, db_expr_t count, char *modif) 774 { 775 struct thread *td; 776 db_expr_t radix; 777 pid_t pid; 778 int t; 779 780 /* 781 * We parse our own arguments. We don't like the default radix. 782 */ 783 radix = db_radix; 784 db_radix = 10; 785 hastid = db_expression(&tid); 786 t = db_read_token(); 787 if (t == tCOMMA) { 788 if (!db_expression(&count)) { 789 db_printf("Count missing\n"); 790 db_flush_lex(); 791 return; 792 } 793 } else { 794 db_unread_token(t); 795 count = -1; 796 } 797 db_skip_to_eol(); 798 db_radix = radix; 799 800 if (hastid) { 801 td = kdb_thr_lookup((lwpid_t)tid); 802 if (td == NULL) 803 td = kdb_thr_from_pid((pid_t)tid); 804 if (td == NULL) { 805 db_printf("Thread %d not found\n", (int)tid); 806 return; 807 } 808 } else 809 td = kdb_thread; 810 if (td->td_proc != NULL) 811 pid = td->td_proc->p_pid; 812 else 813 pid = -1; 814 db_printf("Tracing pid %d tid %ld td %p\n", pid, (long)td->td_tid, td); 815 db_trace_thread(td, count); 816 } 817 818 static void 819 db_stack_trace_all(db_expr_t dummy, boolean_t dummy2, db_expr_t dummy3, 820 char *dummy4) 821 { 822 struct proc *p; 823 struct thread *td; 824 jmp_buf jb; 825 void *prev_jb; 826 827 FOREACH_PROC_IN_SYSTEM(p) { 828 prev_jb = kdb_jmpbuf(jb); 829 if (setjmp(jb) == 0) { 830 FOREACH_THREAD_IN_PROC(p, td) { 831 db_printf("\nTracing command %s pid %d tid %ld td %p\n", 832 p->p_comm, p->p_pid, (long)td->td_tid, td); 833 db_trace_thread(td, -1); 834 if (db_pager_quit) { 835 kdb_jmpbuf(prev_jb); 836 return; 837 } 838 } 839 } 840 kdb_jmpbuf(prev_jb); 841 } 842 } 843 844 /* 845 * Take the parsed expression value from the command line that was parsed 846 * as a hexadecimal value and convert it as if the expression was parsed 847 * as a decimal value. Returns -1 if the expression was not a valid 848 * decimal value. 849 */ 850 db_expr_t 851 db_hex2dec(db_expr_t expr) 852 { 853 uintptr_t x, y; 854 db_expr_t val; 855 856 y = 1; 857 val = 0; 858 x = expr; 859 while (x != 0) { 860 if (x % 16 > 9) 861 return (-1); 862 val += (x % 16) * (y); 863 x >>= 4; 864 y *= 10; 865 } 866 return (val); 867 } 868