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 }; 144 struct command_table db_cmd_table = LIST_HEAD_INITIALIZER(db_cmd_table); 145 146 static struct command *db_last_command = 0; 147 148 /* 149 * if 'ed' style: 'dot' is set at start of last item printed, 150 * and '+' points to next line. 151 * Otherwise: 'dot' points to next item, '..' points to last. 152 */ 153 static boolean_t db_ed_style = TRUE; 154 155 /* 156 * Utility routine - discard tokens through end-of-line. 157 */ 158 void 159 db_skip_to_eol() 160 { 161 int t; 162 do { 163 t = db_read_token(); 164 } while (t != tEOL); 165 } 166 167 /* 168 * Results of command search. 169 */ 170 #define CMD_UNIQUE 0 171 #define CMD_FOUND 1 172 #define CMD_NONE 2 173 #define CMD_AMBIGUOUS 3 174 #define CMD_HELP 4 175 176 static void db_cmd_match(char *name, struct command *cmd, 177 struct command **cmdp, int *resultp); 178 static void db_cmd_list(struct command_table *table); 179 static int db_cmd_search(char *name, struct command_table *table, 180 struct command **cmdp); 181 static void db_command(struct command **last_cmdp, 182 struct command_table *cmd_table, int dopager); 183 184 /* 185 * Initialize the command lists from the static tables. 186 */ 187 void 188 db_command_init(void) 189 { 190 #define N(a) (sizeof(a) / sizeof(a[0])) 191 int i; 192 193 for (i = 0; i < N(db_cmds); i++) 194 db_command_register(&db_cmd_table, &db_cmds[i]); 195 for (i = 0; i < N(db_show_cmds); i++) 196 db_command_register(&db_show_table, &db_show_cmds[i]); 197 for (i = 0; i < N(db_show_all_cmds); i++) 198 db_command_register(&db_show_all_table, &db_show_all_cmds[i]); 199 #undef N 200 } 201 202 /* 203 * Register a command. 204 */ 205 void 206 db_command_register(struct command_table *list, struct command *cmd) 207 { 208 struct command *c, *last; 209 210 last = NULL; 211 LIST_FOREACH(c, list, next) { 212 int n = strcmp(cmd->name, c->name); 213 214 /* Check that the command is not already present. */ 215 if (n == 0) { 216 printf("%s: Warning, the command \"%s\" already exists;" 217 " ignoring request\n", __func__, cmd->name); 218 return; 219 } 220 if (n < 0) { 221 /* NB: keep list sorted lexicographically */ 222 LIST_INSERT_BEFORE(c, cmd, next); 223 return; 224 } 225 last = c; 226 } 227 if (last == NULL) 228 LIST_INSERT_HEAD(list, cmd, next); 229 else 230 LIST_INSERT_AFTER(last, cmd, next); 231 } 232 233 /* 234 * Remove a command previously registered with db_command_register. 235 */ 236 void 237 db_command_unregister(struct command_table *list, struct command *cmd) 238 { 239 struct command *c; 240 241 LIST_FOREACH(c, list, next) { 242 if (cmd == c) { 243 LIST_REMOVE(cmd, next); 244 return; 245 } 246 } 247 /* NB: intentionally quiet */ 248 } 249 250 /* 251 * Helper function to match a single command. 252 */ 253 static void 254 db_cmd_match(name, cmd, cmdp, resultp) 255 char * name; 256 struct command *cmd; 257 struct command **cmdp; /* out */ 258 int * resultp; 259 { 260 char *lp, *rp; 261 int c; 262 263 lp = name; 264 rp = cmd->name; 265 while ((c = *lp) == *rp) { 266 if (c == 0) { 267 /* complete match */ 268 *cmdp = cmd; 269 *resultp = CMD_UNIQUE; 270 return; 271 } 272 lp++; 273 rp++; 274 } 275 if (c == 0) { 276 /* end of name, not end of command - 277 partial match */ 278 if (*resultp == CMD_FOUND) { 279 *resultp = CMD_AMBIGUOUS; 280 /* but keep looking for a full match - 281 this lets us match single letters */ 282 } else { 283 *cmdp = cmd; 284 *resultp = CMD_FOUND; 285 } 286 } 287 } 288 289 /* 290 * Search for command prefix. 291 */ 292 static int 293 db_cmd_search(name, table, cmdp) 294 char * name; 295 struct command_table *table; 296 struct command **cmdp; /* out */ 297 { 298 struct command *cmd; 299 int result = CMD_NONE; 300 301 LIST_FOREACH(cmd, table, next) { 302 db_cmd_match(name,cmd,cmdp,&result); 303 if (result == CMD_UNIQUE) 304 break; 305 } 306 307 if (result == CMD_NONE) { 308 /* check for 'help' */ 309 if (name[0] == 'h' && name[1] == 'e' 310 && name[2] == 'l' && name[3] == 'p') 311 result = CMD_HELP; 312 } 313 return (result); 314 } 315 316 static void 317 db_cmd_list(table) 318 struct command_table *table; 319 { 320 register struct command *cmd; 321 322 LIST_FOREACH(cmd, table, next) { 323 db_printf("%-12s", cmd->name); 324 db_end_line(12); 325 } 326 } 327 328 static void 329 db_command(last_cmdp, cmd_table, dopager) 330 struct command **last_cmdp; /* IN_OUT */ 331 struct command_table *cmd_table; 332 int dopager; 333 { 334 struct command *cmd = NULL; 335 int t; 336 char modif[TOK_STRING_SIZE]; 337 db_expr_t addr, count; 338 boolean_t have_addr = FALSE; 339 int result; 340 341 t = db_read_token(); 342 if (t == tEOL) { 343 /* empty line repeats last command, at 'next' */ 344 cmd = *last_cmdp; 345 addr = (db_expr_t)db_next; 346 have_addr = FALSE; 347 count = 1; 348 modif[0] = '\0'; 349 } 350 else if (t == tEXCL) { 351 db_fncall((db_expr_t)0, (boolean_t)0, (db_expr_t)0, (char *)0); 352 return; 353 } 354 else if (t != tIDENT) { 355 db_printf("?\n"); 356 db_flush_lex(); 357 return; 358 } 359 else { 360 /* 361 * Search for command 362 */ 363 while (cmd_table) { 364 result = db_cmd_search(db_tok_string, 365 cmd_table, 366 &cmd); 367 switch (result) { 368 case CMD_NONE: 369 db_printf("No such command\n"); 370 db_flush_lex(); 371 return; 372 case CMD_AMBIGUOUS: 373 db_printf("Ambiguous\n"); 374 db_flush_lex(); 375 return; 376 case CMD_HELP: 377 db_cmd_list(cmd_table); 378 db_flush_lex(); 379 return; 380 default: 381 break; 382 } 383 if ((cmd_table = cmd->more) != NULL) { 384 t = db_read_token(); 385 if (t != tIDENT) { 386 db_cmd_list(cmd_table); 387 db_flush_lex(); 388 return; 389 } 390 } 391 } 392 393 if ((cmd->flag & CS_OWN) == 0) { 394 /* 395 * Standard syntax: 396 * command [/modifier] [addr] [,count] 397 */ 398 t = db_read_token(); 399 if (t == tSLASH) { 400 t = db_read_token(); 401 if (t != tIDENT) { 402 db_printf("Bad modifier\n"); 403 db_flush_lex(); 404 return; 405 } 406 db_strcpy(modif, db_tok_string); 407 } 408 else { 409 db_unread_token(t); 410 modif[0] = '\0'; 411 } 412 413 if (db_expression(&addr)) { 414 db_dot = (db_addr_t) addr; 415 db_last_addr = db_dot; 416 have_addr = TRUE; 417 } 418 else { 419 addr = (db_expr_t) db_dot; 420 have_addr = FALSE; 421 } 422 t = db_read_token(); 423 if (t == tCOMMA) { 424 if (!db_expression(&count)) { 425 db_printf("Count missing\n"); 426 db_flush_lex(); 427 return; 428 } 429 } 430 else { 431 db_unread_token(t); 432 count = -1; 433 } 434 if ((cmd->flag & CS_MORE) == 0) { 435 db_skip_to_eol(); 436 } 437 } 438 } 439 *last_cmdp = cmd; 440 if (cmd != 0) { 441 /* 442 * Execute the command. 443 */ 444 if (dopager) 445 db_enable_pager(); 446 else 447 db_disable_pager(); 448 (*cmd->fcn)(addr, have_addr, count, modif); 449 if (dopager) 450 db_disable_pager(); 451 452 if (cmd->flag & CS_SET_DOT) { 453 /* 454 * If command changes dot, set dot to 455 * previous address displayed (if 'ed' style). 456 */ 457 if (db_ed_style) { 458 db_dot = db_prev; 459 } 460 else { 461 db_dot = db_next; 462 } 463 } 464 else { 465 /* 466 * If command does not change dot, 467 * set 'next' location to be the same. 468 */ 469 db_next = db_dot; 470 } 471 } 472 } 473 474 /* 475 * At least one non-optional command must be implemented using 476 * DB_COMMAND() so that db_cmd_set gets created. Here is one. 477 */ 478 DB_COMMAND(panic, db_panic) 479 { 480 db_disable_pager(); 481 panic("from debugger"); 482 } 483 484 void 485 db_command_loop() 486 { 487 /* 488 * Initialize 'prev' and 'next' to dot. 489 */ 490 db_prev = db_dot; 491 db_next = db_dot; 492 493 db_cmd_loop_done = 0; 494 while (!db_cmd_loop_done) { 495 if (db_print_position() != 0) 496 db_printf("\n"); 497 498 db_printf("db> "); 499 (void) db_read_line(); 500 501 db_command(&db_last_command, &db_cmd_table, /* dopager */ 1); 502 } 503 } 504 505 /* 506 * Execute a command on behalf of a script. The caller is responsible for 507 * making sure that the command string is < DB_MAXLINE or it will be 508 * truncated. 509 * 510 * XXXRW: Runs by injecting faked input into DDB input stream; it would be 511 * nicer to use an alternative approach that didn't mess with the previous 512 * command buffer. 513 */ 514 void 515 db_command_script(const char *command) 516 { 517 db_prev = db_next = db_dot; 518 db_inject_line(command); 519 db_command(&db_last_command, &db_cmd_table, /* dopager */ 0); 520 } 521 522 void 523 db_error(s) 524 const char *s; 525 { 526 if (s) 527 db_printf("%s", s); 528 db_flush_lex(); 529 kdb_reenter(); 530 } 531 532 static void 533 db_dump(db_expr_t dummy, boolean_t dummy2, db_expr_t dummy3, char *dummy4) 534 { 535 int error; 536 537 error = doadump(FALSE); 538 if (error) { 539 db_printf("Cannot dump: "); 540 switch (error) { 541 case EBUSY: 542 db_printf("debugger got invoked while dumping.\n"); 543 break; 544 case ENXIO: 545 db_printf("no dump device specified.\n"); 546 break; 547 default: 548 db_printf("unknown error (error=%d).\n", error); 549 break; 550 } 551 } 552 } 553 554 /* 555 * Call random function: 556 * !expr(arg,arg,arg) 557 */ 558 559 /* The generic implementation supports a maximum of 10 arguments. */ 560 typedef db_expr_t __db_f(db_expr_t, db_expr_t, db_expr_t, db_expr_t, 561 db_expr_t, db_expr_t, db_expr_t, db_expr_t, db_expr_t, db_expr_t); 562 563 static __inline int 564 db_fncall_generic(db_expr_t addr, db_expr_t *rv, int nargs, db_expr_t args[]) 565 { 566 __db_f *f = (__db_f *)addr; 567 568 if (nargs > 10) { 569 db_printf("Too many arguments (max 10)\n"); 570 return (0); 571 } 572 *rv = (*f)(args[0], args[1], args[2], args[3], args[4], args[5], 573 args[6], args[7], args[8], args[9]); 574 return (1); 575 } 576 577 static void 578 db_fncall(dummy1, dummy2, dummy3, dummy4) 579 db_expr_t dummy1; 580 boolean_t dummy2; 581 db_expr_t dummy3; 582 char * dummy4; 583 { 584 db_expr_t fn_addr; 585 db_expr_t args[DB_MAXARGS]; 586 int nargs = 0; 587 db_expr_t retval; 588 int t; 589 590 if (!db_expression(&fn_addr)) { 591 db_printf("Bad function\n"); 592 db_flush_lex(); 593 return; 594 } 595 596 t = db_read_token(); 597 if (t == tLPAREN) { 598 if (db_expression(&args[0])) { 599 nargs++; 600 while ((t = db_read_token()) == tCOMMA) { 601 if (nargs == DB_MAXARGS) { 602 db_printf("Too many arguments (max %d)\n", DB_MAXARGS); 603 db_flush_lex(); 604 return; 605 } 606 if (!db_expression(&args[nargs])) { 607 db_printf("Argument missing\n"); 608 db_flush_lex(); 609 return; 610 } 611 nargs++; 612 } 613 db_unread_token(t); 614 } 615 if (db_read_token() != tRPAREN) { 616 db_printf("?\n"); 617 db_flush_lex(); 618 return; 619 } 620 } 621 db_skip_to_eol(); 622 db_disable_pager(); 623 624 if (DB_CALL(fn_addr, &retval, nargs, args)) 625 db_printf("= %#lr\n", (long)retval); 626 } 627 628 static void 629 db_halt(db_expr_t dummy, boolean_t dummy2, db_expr_t dummy3, char *dummy4) 630 { 631 632 cpu_halt(); 633 } 634 635 static void 636 db_kill(dummy1, dummy2, dummy3, dummy4) 637 db_expr_t dummy1; 638 boolean_t dummy2; 639 db_expr_t dummy3; 640 char * dummy4; 641 { 642 db_expr_t old_radix, pid, sig; 643 struct proc *p; 644 645 #define DB_ERROR(f) do { db_printf f; db_flush_lex(); goto out; } while (0) 646 647 /* 648 * PIDs and signal numbers are typically represented in base 649 * 10, so make that the default here. It can, of course, be 650 * overridden by specifying a prefix. 651 */ 652 old_radix = db_radix; 653 db_radix = 10; 654 /* Retrieve arguments. */ 655 if (!db_expression(&sig)) 656 DB_ERROR(("Missing signal number\n")); 657 if (!db_expression(&pid)) 658 DB_ERROR(("Missing process ID\n")); 659 db_skip_to_eol(); 660 if (!_SIG_VALID(sig)) 661 DB_ERROR(("Signal number out of range\n")); 662 663 /* 664 * Find the process in question. allproc_lock is not needed 665 * since we're in DDB. 666 */ 667 /* sx_slock(&allproc_lock); */ 668 FOREACH_PROC_IN_SYSTEM(p) 669 if (p->p_pid == pid) 670 break; 671 /* sx_sunlock(&allproc_lock); */ 672 if (p == NULL) 673 DB_ERROR(("Can't find process with pid %ld\n", (long) pid)); 674 675 /* If it's already locked, bail; otherwise, do the deed. */ 676 if (PROC_TRYLOCK(p) == 0) 677 DB_ERROR(("Can't lock process with pid %ld\n", (long) pid)); 678 else { 679 pksignal(p, sig, NULL); 680 PROC_UNLOCK(p); 681 } 682 683 out: 684 db_radix = old_radix; 685 #undef DB_ERROR 686 } 687 688 /* 689 * Reboot. In case there is an additional argument, take it as delay in 690 * seconds. Default to 15s if we cannot parse it and make sure we will 691 * never wait longer than 1 week. Some code is similar to 692 * kern_shutdown.c:shutdown_panic(). 693 */ 694 #ifndef DB_RESET_MAXDELAY 695 #define DB_RESET_MAXDELAY (3600 * 24 * 7) 696 #endif 697 698 static void 699 db_reset(db_expr_t addr, boolean_t have_addr, db_expr_t count __unused, 700 char *modif __unused) 701 { 702 int delay, loop; 703 704 if (have_addr) { 705 delay = (int)db_hex2dec(addr); 706 707 /* If we parse to fail, use 15s. */ 708 if (delay == -1) 709 delay = 15; 710 711 /* Cap at one week. */ 712 if ((uintmax_t)delay > (uintmax_t)DB_RESET_MAXDELAY) 713 delay = DB_RESET_MAXDELAY; 714 715 db_printf("Automatic reboot in %d seconds - " 716 "press a key on the console to abort\n", delay); 717 for (loop = delay * 10; loop > 0; --loop) { 718 DELAY(1000 * 100); /* 1/10th second */ 719 /* Did user type a key? */ 720 if (cncheckc() != -1) 721 return; 722 } 723 } 724 725 cpu_reset(); 726 } 727 728 static void 729 db_watchdog(dummy1, dummy2, dummy3, dummy4) 730 db_expr_t dummy1; 731 boolean_t dummy2; 732 db_expr_t dummy3; 733 char * dummy4; 734 { 735 db_expr_t old_radix, tout; 736 int err, i; 737 738 old_radix = db_radix; 739 db_radix = 10; 740 err = db_expression(&tout); 741 db_skip_to_eol(); 742 db_radix = old_radix; 743 744 /* If no argument is provided the watchdog will just be disabled. */ 745 if (err == 0) { 746 db_printf("No argument provided, disabling watchdog\n"); 747 tout = 0; 748 } else if ((tout & WD_INTERVAL) == WD_TO_NEVER) { 749 db_error("Out of range watchdog interval\n"); 750 return; 751 } 752 EVENTHANDLER_INVOKE(watchdog_list, tout, &i); 753 } 754 755 static void 756 db_gdb(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, char *dummy4) 757 { 758 759 if (kdb_dbbe_select("gdb") != 0) { 760 db_printf("The remote GDB backend could not be selected.\n"); 761 return; 762 } 763 /* 764 * Mark that we are done in the debugger. kdb_trap() 765 * should re-enter with the new backend. 766 */ 767 db_cmd_loop_done = 1; 768 db_printf("(ctrl-c will return control to ddb)\n"); 769 } 770 771 static void 772 db_stack_trace(db_expr_t tid, boolean_t hastid, db_expr_t count, char *modif) 773 { 774 struct thread *td; 775 db_expr_t radix; 776 pid_t pid; 777 int t; 778 779 /* 780 * We parse our own arguments. We don't like the default radix. 781 */ 782 radix = db_radix; 783 db_radix = 10; 784 hastid = db_expression(&tid); 785 t = db_read_token(); 786 if (t == tCOMMA) { 787 if (!db_expression(&count)) { 788 db_printf("Count missing\n"); 789 db_flush_lex(); 790 return; 791 } 792 } else { 793 db_unread_token(t); 794 count = -1; 795 } 796 db_skip_to_eol(); 797 db_radix = radix; 798 799 if (hastid) { 800 td = kdb_thr_lookup((lwpid_t)tid); 801 if (td == NULL) 802 td = kdb_thr_from_pid((pid_t)tid); 803 if (td == NULL) { 804 db_printf("Thread %d not found\n", (int)tid); 805 return; 806 } 807 } else 808 td = kdb_thread; 809 if (td->td_proc != NULL) 810 pid = td->td_proc->p_pid; 811 else 812 pid = -1; 813 db_printf("Tracing pid %d tid %ld td %p\n", pid, (long)td->td_tid, td); 814 db_trace_thread(td, count); 815 } 816 817 static void 818 db_stack_trace_all(db_expr_t dummy, boolean_t dummy2, db_expr_t dummy3, 819 char *dummy4) 820 { 821 struct proc *p; 822 struct thread *td; 823 jmp_buf jb; 824 void *prev_jb; 825 826 FOREACH_PROC_IN_SYSTEM(p) { 827 prev_jb = kdb_jmpbuf(jb); 828 if (setjmp(jb) == 0) { 829 FOREACH_THREAD_IN_PROC(p, td) { 830 db_printf("\nTracing command %s pid %d tid %ld td %p\n", 831 p->p_comm, p->p_pid, (long)td->td_tid, td); 832 db_trace_thread(td, -1); 833 if (db_pager_quit) { 834 kdb_jmpbuf(prev_jb); 835 return; 836 } 837 } 838 } 839 kdb_jmpbuf(prev_jb); 840 } 841 } 842 843 /* 844 * Take the parsed expression value from the command line that was parsed 845 * as a hexadecimal value and convert it as if the expression was parsed 846 * as a decimal value. Returns -1 if the expression was not a valid 847 * decimal value. 848 */ 849 db_expr_t 850 db_hex2dec(db_expr_t expr) 851 { 852 uintptr_t x, y; 853 db_expr_t val; 854 855 y = 1; 856 val = 0; 857 x = expr; 858 while (x != 0) { 859 if (x % 16 > 9) 860 return (-1); 861 val += (x % 16) * (y); 862 x >>= 4; 863 y *= 10; 864 } 865 return (val); 866 } 867