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 int 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_active; 76 static db_cmdfcn_t db_stack_trace_all; 77 static db_cmdfcn_t db_watchdog; 78 79 /* 80 * 'show' commands 81 */ 82 83 static struct command db_show_active_cmds[] = { 84 { "trace", db_stack_trace_active, 0, NULL }, 85 }; 86 struct command_table db_show_active_table = 87 LIST_HEAD_INITIALIZER(db_show_active_table); 88 89 static struct command db_show_all_cmds[] = { 90 { "trace", db_stack_trace_all, 0, NULL }, 91 }; 92 struct command_table db_show_all_table = 93 LIST_HEAD_INITIALIZER(db_show_all_table); 94 95 static struct command db_show_cmds[] = { 96 { "active", 0, 0, &db_show_active_table }, 97 { "all", 0, 0, &db_show_all_table }, 98 { "registers", db_show_regs, 0, NULL }, 99 { "breaks", db_listbreak_cmd, 0, NULL }, 100 { "threads", db_show_threads, 0, NULL }, 101 }; 102 struct command_table db_show_table = LIST_HEAD_INITIALIZER(db_show_table); 103 104 static struct command db_cmds[] = { 105 { "print", db_print_cmd, 0, NULL }, 106 { "p", db_print_cmd, 0, NULL }, 107 { "examine", db_examine_cmd, CS_SET_DOT, NULL }, 108 { "x", db_examine_cmd, CS_SET_DOT, NULL }, 109 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, 110 { "set", db_set_cmd, CS_OWN, NULL }, 111 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 112 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 113 { "delete", db_delete_cmd, 0, NULL }, 114 { "d", db_delete_cmd, 0, NULL }, 115 { "dump", db_dump, 0, NULL }, 116 { "break", db_breakpoint_cmd, 0, NULL }, 117 { "b", db_breakpoint_cmd, 0, NULL }, 118 { "dwatch", db_deletewatch_cmd, 0, NULL }, 119 { "watch", db_watchpoint_cmd, CS_MORE,NULL }, 120 { "dhwatch", db_deletehwatch_cmd, 0, NULL }, 121 { "hwatch", db_hwatchpoint_cmd, 0, NULL }, 122 { "step", db_single_step_cmd, 0, NULL }, 123 { "s", db_single_step_cmd, 0, NULL }, 124 { "continue", db_continue_cmd, 0, NULL }, 125 { "c", db_continue_cmd, 0, NULL }, 126 { "until", db_trace_until_call_cmd,0, NULL }, 127 { "next", db_trace_until_matching_cmd,0, NULL }, 128 { "match", db_trace_until_matching_cmd,0, NULL }, 129 { "trace", db_stack_trace, CS_OWN, NULL }, 130 { "t", db_stack_trace, CS_OWN, NULL }, 131 /* XXX alias for active trace */ 132 { "acttrace", db_stack_trace_active, 0, NULL }, 133 /* XXX alias for all trace */ 134 { "alltrace", db_stack_trace_all, 0, NULL }, 135 { "where", db_stack_trace, CS_OWN, NULL }, 136 { "bt", db_stack_trace, CS_OWN, NULL }, 137 { "call", db_fncall, CS_OWN, NULL }, 138 { "show", 0, 0, &db_show_table }, 139 { "ps", db_ps, 0, NULL }, 140 { "gdb", db_gdb, 0, NULL }, 141 { "halt", db_halt, 0, NULL }, 142 { "reboot", db_reset, 0, NULL }, 143 { "reset", db_reset, 0, NULL }, 144 { "kill", db_kill, CS_OWN, NULL }, 145 { "watchdog", db_watchdog, CS_OWN, NULL }, 146 { "thread", db_set_thread, CS_OWN, NULL }, 147 { "run", db_run_cmd, CS_OWN, NULL }, 148 { "script", db_script_cmd, CS_OWN, NULL }, 149 { "scripts", db_scripts_cmd, 0, NULL }, 150 { "unscript", db_unscript_cmd, CS_OWN, NULL }, 151 { "capture", db_capture_cmd, CS_OWN, NULL }, 152 { "textdump", db_textdump_cmd, CS_OWN, NULL }, 153 { "findstack", db_findstack_cmd, 0, NULL }, 154 }; 155 struct command_table db_cmd_table = LIST_HEAD_INITIALIZER(db_cmd_table); 156 157 static struct command *db_last_command = NULL; 158 159 /* 160 * if 'ed' style: 'dot' is set at start of last item printed, 161 * and '+' points to next line. 162 * Otherwise: 'dot' points to next item, '..' points to last. 163 */ 164 static bool db_ed_style = true; 165 166 /* 167 * Utility routine - discard tokens through end-of-line. 168 */ 169 void 170 db_skip_to_eol(void) 171 { 172 int t; 173 do { 174 t = db_read_token(); 175 } while (t != tEOL); 176 } 177 178 /* 179 * Results of command search. 180 */ 181 #define CMD_UNIQUE 0 182 #define CMD_FOUND 1 183 #define CMD_NONE 2 184 #define CMD_AMBIGUOUS 3 185 #define CMD_HELP 4 186 187 static void db_cmd_match(char *name, struct command *cmd, 188 struct command **cmdp, int *resultp); 189 static void db_cmd_list(struct command_table *table); 190 static int db_cmd_search(char *name, struct command_table *table, 191 struct command **cmdp); 192 static void db_command(struct command **last_cmdp, 193 struct command_table *cmd_table, int dopager); 194 195 /* 196 * Initialize the command lists from the static tables. 197 */ 198 void 199 db_command_init(void) 200 { 201 #define N(a) (sizeof(a) / sizeof(a[0])) 202 int i; 203 204 for (i = 0; i < N(db_cmds); i++) 205 db_command_register(&db_cmd_table, &db_cmds[i]); 206 for (i = 0; i < N(db_show_cmds); i++) 207 db_command_register(&db_show_table, &db_show_cmds[i]); 208 for (i = 0; i < N(db_show_active_cmds); i++) 209 db_command_register(&db_show_active_table, 210 &db_show_active_cmds[i]); 211 for (i = 0; i < N(db_show_all_cmds); i++) 212 db_command_register(&db_show_all_table, &db_show_all_cmds[i]); 213 #undef N 214 } 215 216 /* 217 * Register a command. 218 */ 219 void 220 db_command_register(struct command_table *list, struct command *cmd) 221 { 222 struct command *c, *last; 223 224 last = NULL; 225 LIST_FOREACH(c, list, next) { 226 int n = strcmp(cmd->name, c->name); 227 228 /* Check that the command is not already present. */ 229 if (n == 0) { 230 printf("%s: Warning, the command \"%s\" already exists;" 231 " ignoring request\n", __func__, cmd->name); 232 return; 233 } 234 if (n < 0) { 235 /* NB: keep list sorted lexicographically */ 236 LIST_INSERT_BEFORE(c, cmd, next); 237 return; 238 } 239 last = c; 240 } 241 if (last == NULL) 242 LIST_INSERT_HEAD(list, cmd, next); 243 else 244 LIST_INSERT_AFTER(last, cmd, next); 245 } 246 247 /* 248 * Remove a command previously registered with db_command_register. 249 */ 250 void 251 db_command_unregister(struct command_table *list, struct command *cmd) 252 { 253 struct command *c; 254 255 LIST_FOREACH(c, list, next) { 256 if (cmd == c) { 257 LIST_REMOVE(cmd, next); 258 return; 259 } 260 } 261 /* NB: intentionally quiet */ 262 } 263 264 /* 265 * Helper function to match a single command. 266 */ 267 static void 268 db_cmd_match(char *name, struct command *cmd, struct command **cmdp, 269 int *resultp) 270 { 271 char *lp, *rp; 272 int c; 273 274 lp = name; 275 rp = cmd->name; 276 while ((c = *lp) == *rp) { 277 if (c == 0) { 278 /* complete match */ 279 *cmdp = cmd; 280 *resultp = CMD_UNIQUE; 281 return; 282 } 283 lp++; 284 rp++; 285 } 286 if (c == 0) { 287 /* end of name, not end of command - 288 partial match */ 289 if (*resultp == CMD_FOUND) { 290 *resultp = CMD_AMBIGUOUS; 291 /* but keep looking for a full match - 292 this lets us match single letters */ 293 } else { 294 *cmdp = cmd; 295 *resultp = CMD_FOUND; 296 } 297 } 298 } 299 300 /* 301 * Search for command prefix. 302 */ 303 static int 304 db_cmd_search(char *name, struct command_table *table, struct command **cmdp) 305 { 306 struct command *cmd; 307 int result = CMD_NONE; 308 309 LIST_FOREACH(cmd, table, next) { 310 db_cmd_match(name,cmd,cmdp,&result); 311 if (result == CMD_UNIQUE) 312 break; 313 } 314 315 if (result == CMD_NONE) { 316 /* check for 'help' */ 317 if (name[0] == 'h' && name[1] == 'e' 318 && name[2] == 'l' && name[3] == 'p') 319 result = CMD_HELP; 320 } 321 return (result); 322 } 323 324 static void 325 db_cmd_list(struct command_table *table) 326 { 327 struct command *cmd; 328 329 LIST_FOREACH(cmd, table, next) { 330 db_printf("%-16s", cmd->name); 331 db_end_line(16); 332 } 333 } 334 335 static void 336 db_command(struct command **last_cmdp, struct command_table *cmd_table, 337 int dopager) 338 { 339 struct command *cmd = NULL; 340 int t; 341 char modif[TOK_STRING_SIZE]; 342 db_expr_t addr, count; 343 bool have_addr = false; 344 int result; 345 346 t = db_read_token(); 347 if (t == tEOL) { 348 /* empty line repeats last command, at 'next' */ 349 cmd = *last_cmdp; 350 addr = (db_expr_t)db_next; 351 have_addr = false; 352 count = 1; 353 modif[0] = '\0'; 354 } 355 else if (t == tEXCL) { 356 db_fncall((db_expr_t)0, (bool)false, (db_expr_t)0, (char *)0); 357 return; 358 } 359 else if (t != tIDENT) { 360 db_printf("?\n"); 361 db_flush_lex(); 362 return; 363 } 364 else { 365 /* 366 * Search for command 367 */ 368 while (cmd_table) { 369 result = db_cmd_search(db_tok_string, 370 cmd_table, 371 &cmd); 372 switch (result) { 373 case CMD_NONE: 374 db_printf("No such command\n"); 375 db_flush_lex(); 376 return; 377 case CMD_AMBIGUOUS: 378 db_printf("Ambiguous\n"); 379 db_flush_lex(); 380 return; 381 case CMD_HELP: 382 db_cmd_list(cmd_table); 383 db_flush_lex(); 384 return; 385 default: 386 break; 387 } 388 if ((cmd_table = cmd->more) != NULL) { 389 t = db_read_token(); 390 if (t != tIDENT) { 391 db_cmd_list(cmd_table); 392 db_flush_lex(); 393 return; 394 } 395 } 396 } 397 398 if ((cmd->flag & CS_OWN) == 0) { 399 /* 400 * Standard syntax: 401 * command [/modifier] [addr] [,count] 402 */ 403 t = db_read_token(); 404 if (t == tSLASH) { 405 t = db_read_token(); 406 if (t != tIDENT) { 407 db_printf("Bad modifier\n"); 408 db_flush_lex(); 409 return; 410 } 411 db_strcpy(modif, db_tok_string); 412 } 413 else { 414 db_unread_token(t); 415 modif[0] = '\0'; 416 } 417 418 if (db_expression(&addr)) { 419 db_dot = (db_addr_t) addr; 420 db_last_addr = db_dot; 421 have_addr = true; 422 } 423 else { 424 addr = (db_expr_t) db_dot; 425 have_addr = false; 426 } 427 t = db_read_token(); 428 if (t == tCOMMA) { 429 if (!db_expression(&count)) { 430 db_printf("Count missing\n"); 431 db_flush_lex(); 432 return; 433 } 434 } 435 else { 436 db_unread_token(t); 437 count = -1; 438 } 439 if ((cmd->flag & CS_MORE) == 0) { 440 db_skip_to_eol(); 441 } 442 } 443 } 444 *last_cmdp = cmd; 445 if (cmd != NULL) { 446 /* 447 * Execute the command. 448 */ 449 if (dopager) 450 db_enable_pager(); 451 else 452 db_disable_pager(); 453 (*cmd->fcn)(addr, have_addr, count, modif); 454 if (dopager) 455 db_disable_pager(); 456 457 if (cmd->flag & CS_SET_DOT) { 458 /* 459 * If command changes dot, set dot to 460 * previous address displayed (if 'ed' style). 461 */ 462 if (db_ed_style) { 463 db_dot = db_prev; 464 } 465 else { 466 db_dot = db_next; 467 } 468 } 469 else { 470 /* 471 * If command does not change dot, 472 * set 'next' location to be the same. 473 */ 474 db_next = db_dot; 475 } 476 } 477 } 478 479 /* 480 * At least one non-optional command must be implemented using 481 * DB_COMMAND() so that db_cmd_set gets created. Here is one. 482 */ 483 DB_COMMAND(panic, db_panic) 484 { 485 db_disable_pager(); 486 panic("from debugger"); 487 } 488 489 void 490 db_command_loop(void) 491 { 492 /* 493 * Initialize 'prev' and 'next' to dot. 494 */ 495 db_prev = db_dot; 496 db_next = db_dot; 497 498 db_cmd_loop_done = 0; 499 while (!db_cmd_loop_done) { 500 if (db_print_position() != 0) 501 db_printf("\n"); 502 503 db_printf("db> "); 504 (void) db_read_line(); 505 506 db_command(&db_last_command, &db_cmd_table, /* dopager */ 1); 507 } 508 } 509 510 /* 511 * Execute a command on behalf of a script. The caller is responsible for 512 * making sure that the command string is < DB_MAXLINE or it will be 513 * truncated. 514 * 515 * XXXRW: Runs by injecting faked input into DDB input stream; it would be 516 * nicer to use an alternative approach that didn't mess with the previous 517 * command buffer. 518 */ 519 void 520 db_command_script(const char *command) 521 { 522 db_prev = db_next = db_dot; 523 db_inject_line(command); 524 db_command(&db_last_command, &db_cmd_table, /* dopager */ 0); 525 } 526 527 void 528 db_error(const char *s) 529 { 530 if (s) 531 db_printf("%s", s); 532 db_flush_lex(); 533 kdb_reenter(); 534 } 535 536 static void 537 db_dump(db_expr_t dummy, bool dummy2, db_expr_t dummy3, char *dummy4) 538 { 539 int error; 540 541 if (textdump_pending) { 542 db_printf("textdump_pending set.\n" 543 "run \"textdump unset\" first or \"textdump dump\" for a textdump.\n"); 544 return; 545 } 546 error = doadump(false); 547 if (error) { 548 db_printf("Cannot dump: "); 549 switch (error) { 550 case EBUSY: 551 db_printf("debugger got invoked while dumping.\n"); 552 break; 553 case ENXIO: 554 db_printf("no dump device specified.\n"); 555 break; 556 default: 557 db_printf("unknown error (error=%d).\n", error); 558 break; 559 } 560 } 561 } 562 563 /* 564 * Call random function: 565 * !expr(arg,arg,arg) 566 */ 567 568 /* The generic implementation supports a maximum of 10 arguments. */ 569 typedef db_expr_t __db_f(db_expr_t, db_expr_t, db_expr_t, db_expr_t, 570 db_expr_t, db_expr_t, db_expr_t, db_expr_t, db_expr_t, db_expr_t); 571 572 static __inline int 573 db_fncall_generic(db_expr_t addr, db_expr_t *rv, int nargs, db_expr_t args[]) 574 { 575 __db_f *f = (__db_f *)addr; 576 577 if (nargs > 10) { 578 db_printf("Too many arguments (max 10)\n"); 579 return (0); 580 } 581 *rv = (*f)(args[0], args[1], args[2], args[3], args[4], args[5], 582 args[6], args[7], args[8], args[9]); 583 return (1); 584 } 585 586 static void 587 db_fncall(db_expr_t dummy1, bool dummy2, db_expr_t dummy3, char *dummy4) 588 { 589 db_expr_t fn_addr; 590 db_expr_t args[DB_MAXARGS]; 591 int nargs = 0; 592 db_expr_t retval; 593 int t; 594 595 if (!db_expression(&fn_addr)) { 596 db_printf("Bad function\n"); 597 db_flush_lex(); 598 return; 599 } 600 601 t = db_read_token(); 602 if (t == tLPAREN) { 603 if (db_expression(&args[0])) { 604 nargs++; 605 while ((t = db_read_token()) == tCOMMA) { 606 if (nargs == DB_MAXARGS) { 607 db_printf("Too many arguments (max %d)\n", DB_MAXARGS); 608 db_flush_lex(); 609 return; 610 } 611 if (!db_expression(&args[nargs])) { 612 db_printf("Argument missing\n"); 613 db_flush_lex(); 614 return; 615 } 616 nargs++; 617 } 618 db_unread_token(t); 619 } 620 if (db_read_token() != tRPAREN) { 621 db_printf("?\n"); 622 db_flush_lex(); 623 return; 624 } 625 } 626 db_skip_to_eol(); 627 db_disable_pager(); 628 629 if (DB_CALL(fn_addr, &retval, nargs, args)) 630 db_printf("= %#lr\n", (long)retval); 631 } 632 633 static void 634 db_halt(db_expr_t dummy, bool dummy2, db_expr_t dummy3, char *dummy4) 635 { 636 637 cpu_halt(); 638 } 639 640 static void 641 db_kill(db_expr_t dummy1, bool dummy2, db_expr_t dummy3, 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, bool 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(db_expr_t dummy1, bool dummy2, db_expr_t dummy3, char *dummy4) 731 { 732 db_expr_t old_radix, tout; 733 int err, i; 734 735 old_radix = db_radix; 736 db_radix = 10; 737 err = db_expression(&tout); 738 db_skip_to_eol(); 739 db_radix = old_radix; 740 741 /* If no argument is provided the watchdog will just be disabled. */ 742 if (err == 0) { 743 db_printf("No argument provided, disabling watchdog\n"); 744 tout = 0; 745 } else if ((tout & WD_INTERVAL) == WD_TO_NEVER) { 746 db_error("Out of range watchdog interval\n"); 747 return; 748 } 749 EVENTHANDLER_INVOKE(watchdog_list, tout, &i); 750 } 751 752 static void 753 db_gdb(db_expr_t dummy1, bool dummy2, db_expr_t dummy3, char *dummy4) 754 { 755 756 if (kdb_dbbe_select("gdb") != 0) { 757 db_printf("The remote GDB backend could not be selected.\n"); 758 return; 759 } 760 /* 761 * Mark that we are done in the debugger. kdb_trap() 762 * should re-enter with the new backend. 763 */ 764 db_cmd_loop_done = 1; 765 db_printf("(ctrl-c will return control to ddb)\n"); 766 } 767 768 static void 769 db_stack_trace(db_expr_t tid, bool hastid, db_expr_t count, char *modif) 770 { 771 struct thread *td; 772 db_expr_t radix; 773 pid_t pid; 774 int t; 775 776 /* 777 * We parse our own arguments. We don't like the default radix. 778 */ 779 radix = db_radix; 780 db_radix = 10; 781 hastid = db_expression(&tid); 782 t = db_read_token(); 783 if (t == tCOMMA) { 784 if (!db_expression(&count)) { 785 db_printf("Count missing\n"); 786 db_flush_lex(); 787 return; 788 } 789 } else { 790 db_unread_token(t); 791 count = -1; 792 } 793 db_skip_to_eol(); 794 db_radix = radix; 795 796 if (hastid) { 797 td = kdb_thr_lookup((lwpid_t)tid); 798 if (td == NULL) 799 td = kdb_thr_from_pid((pid_t)tid); 800 if (td == NULL) { 801 db_printf("Thread %d not found\n", (int)tid); 802 return; 803 } 804 } else 805 td = kdb_thread; 806 if (td->td_proc != NULL) 807 pid = td->td_proc->p_pid; 808 else 809 pid = -1; 810 db_printf("Tracing pid %d tid %ld td %p\n", pid, (long)td->td_tid, td); 811 db_trace_thread(td, count); 812 } 813 814 static void 815 _db_stack_trace_all(bool active_only) 816 { 817 struct proc *p; 818 struct thread *td; 819 jmp_buf jb; 820 void *prev_jb; 821 822 FOREACH_PROC_IN_SYSTEM(p) { 823 prev_jb = kdb_jmpbuf(jb); 824 if (setjmp(jb) == 0) { 825 FOREACH_THREAD_IN_PROC(p, td) { 826 if (td->td_state == TDS_RUNNING) 827 db_printf("\nTracing command %s pid %d" 828 " tid %ld td %p (CPU %d)\n", 829 p->p_comm, p->p_pid, 830 (long)td->td_tid, td, 831 td->td_oncpu); 832 else if (active_only) 833 continue; 834 else 835 db_printf("\nTracing command %s pid %d" 836 " tid %ld td %p\n", p->p_comm, 837 p->p_pid, (long)td->td_tid, td); 838 db_trace_thread(td, -1); 839 if (db_pager_quit) { 840 kdb_jmpbuf(prev_jb); 841 return; 842 } 843 } 844 } 845 kdb_jmpbuf(prev_jb); 846 } 847 } 848 849 static void 850 db_stack_trace_active(db_expr_t dummy, bool dummy2, db_expr_t dummy3, 851 char *dummy4) 852 { 853 854 _db_stack_trace_all(true); 855 } 856 857 static void 858 db_stack_trace_all(db_expr_t dummy, bool dummy2, db_expr_t dummy3, 859 char *dummy4) 860 { 861 862 _db_stack_trace_all(false); 863 } 864 865 /* 866 * Take the parsed expression value from the command line that was parsed 867 * as a hexadecimal value and convert it as if the expression was parsed 868 * as a decimal value. Returns -1 if the expression was not a valid 869 * decimal value. 870 */ 871 db_expr_t 872 db_hex2dec(db_expr_t expr) 873 { 874 uintptr_t x, y; 875 db_expr_t val; 876 877 y = 1; 878 val = 0; 879 x = expr; 880 while (x != 0) { 881 if (x % 16 > 9) 882 return (-1); 883 val += (x % 16) * (y); 884 x >>= 4; 885 y *= 10; 886 } 887 return (val); 888 } 889