db_command.c revision 1.82
1 /* $NetBSD: db_command.c,v 1.82 2005/12/01 13:21:05 yamt Exp $ */ 2 3 /* 4 * Mach Operating System 5 * Copyright (c) 1991,1990 Carnegie Mellon University 6 * All Rights Reserved. 7 * 8 * Permission to use, copy, modify and distribute this software and its 9 * documentation is hereby granted, provided that both the copyright 10 * notice and this permission notice appear in all copies of the 11 * software, derivative works or modified versions, and any portions 12 * thereof, and that both notices appear in supporting documentation. 13 * 14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 16 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 17 * 18 * Carnegie Mellon requests users of this software to return to 19 * 20 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 21 * School of Computer Science 22 * Carnegie Mellon University 23 * Pittsburgh PA 15213-3890 24 * 25 * any improvements or extensions that they make and grant Carnegie the 26 * rights to redistribute these changes. 27 */ 28 29 /* 30 * Command dispatcher. 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: db_command.c,v 1.82 2005/12/01 13:21:05 yamt Exp $"); 35 36 #include "opt_ddb.h" 37 #include "opt_kgdb.h" 38 #include "opt_inet.h" 39 #include "opt_ddbparam.h" 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/reboot.h> 44 #include <sys/device.h> 45 #include <sys/malloc.h> 46 #include <sys/namei.h> 47 #include <sys/pool.h> 48 #include <sys/proc.h> 49 #include <sys/vnode.h> 50 51 #include <machine/db_machdep.h> /* type definitions */ 52 53 #if defined(_KERNEL_OPT) 54 #include "opt_multiprocessor.h" 55 #endif 56 #ifdef MULTIPROCESSOR 57 #include <machine/cpu.h> 58 #endif 59 60 #include <ddb/db_lex.h> 61 #include <ddb/db_output.h> 62 #include <ddb/db_command.h> 63 #include <ddb/db_break.h> 64 #include <ddb/db_watch.h> 65 #include <ddb/db_run.h> 66 #include <ddb/db_variables.h> 67 #include <ddb/db_interface.h> 68 #include <ddb/db_sym.h> 69 #include <ddb/db_extern.h> 70 71 #include <uvm/uvm_extern.h> 72 #include <uvm/uvm_ddb.h> 73 74 #include "arp.h" 75 76 /* 77 * Results of command search. 78 */ 79 #define CMD_UNIQUE 0 80 #define CMD_FOUND 1 81 #define CMD_NONE 2 82 #define CMD_AMBIGUOUS 3 83 #define CMD_HELP 4 84 85 /* 86 * Exported global variables 87 */ 88 boolean_t db_cmd_loop_done; 89 label_t *db_recover; 90 db_addr_t db_dot; 91 db_addr_t db_last_addr; 92 db_addr_t db_prev; 93 db_addr_t db_next; 94 95 /* 96 * if 'ed' style: 'dot' is set at start of last item printed, 97 * and '+' points to next line. 98 * Otherwise: 'dot' points to next item, '..' points to last. 99 */ 100 static boolean_t db_ed_style = TRUE; 101 102 static void db_buf_print_cmd(db_expr_t, int, db_expr_t, const char *); 103 static void db_cmd_list(const struct db_command *); 104 static int db_cmd_search(const char *, const struct db_command *, 105 const struct db_command **); 106 static void db_command(const struct db_command **, 107 const struct db_command *); 108 static void db_event_print_cmd(db_expr_t, int, db_expr_t, const char *); 109 static void db_fncall(db_expr_t, int, db_expr_t, const char *); 110 static void db_malloc_print_cmd(db_expr_t, int, db_expr_t, const char *); 111 static void db_map_print_cmd(db_expr_t, int, db_expr_t, const char *); 112 static void db_namecache_print_cmd(db_expr_t, int, db_expr_t, const char *); 113 static void db_object_print_cmd(db_expr_t, int, db_expr_t, const char *); 114 static void db_page_print_cmd(db_expr_t, int, db_expr_t, const char *); 115 static void db_pool_print_cmd(db_expr_t, int, db_expr_t, const char *); 116 static void db_reboot_cmd(db_expr_t, int, db_expr_t, const char *); 117 static void db_sifting_cmd(db_expr_t, int, db_expr_t, const char *); 118 static void db_stack_trace_cmd(db_expr_t, int, db_expr_t, const char *); 119 static void db_sync_cmd(db_expr_t, int, db_expr_t, const char *); 120 static void db_uvmexp_print_cmd(db_expr_t, int, db_expr_t, const char *); 121 static void db_vnode_print_cmd(db_expr_t, int, db_expr_t, const char *); 122 static void db_mount_print_cmd(db_expr_t, int, db_expr_t, const char *); 123 124 /* 125 * 'show' commands 126 */ 127 128 static const struct db_command db_show_all_cmds[] = { 129 { "callout", db_show_callout, 0, NULL }, 130 { "procs", db_show_all_procs, 0, NULL }, 131 { "pools", db_show_all_pools, 0, NULL }, 132 { NULL, NULL, 0, NULL } 133 }; 134 135 static const struct db_command db_show_cmds[] = { 136 { "all", NULL, 0, db_show_all_cmds }, 137 #if defined(INET) && (NARP > 0) 138 { "arptab", db_show_arptab, 0, NULL }, 139 #endif 140 { "breaks", db_listbreak_cmd, 0, NULL }, 141 { "buf", db_buf_print_cmd, 0, NULL }, 142 { "event", db_event_print_cmd, 0, NULL }, 143 { "malloc", db_malloc_print_cmd, 0, NULL }, 144 { "map", db_map_print_cmd, 0, NULL }, 145 { "mount", db_mount_print_cmd, 0, NULL }, 146 { "ncache", db_namecache_print_cmd, 0, NULL }, 147 { "object", db_object_print_cmd, 0, NULL }, 148 { "page", db_page_print_cmd, 0, NULL }, 149 { "pool", db_pool_print_cmd, 0, NULL }, 150 { "registers", db_show_regs, 0, NULL }, 151 { "sched_qs", db_show_sched_qs, 0, NULL }, 152 { "uvmexp", db_uvmexp_print_cmd, 0, NULL }, 153 { "vnode", db_vnode_print_cmd, 0, NULL }, 154 { "watches", db_listwatch_cmd, 0, NULL }, 155 { NULL, NULL, 0, NULL } 156 }; 157 158 /* arch/<arch>/<arch>/db_interface.c */ 159 #ifdef DB_MACHINE_COMMANDS 160 extern const struct db_command db_machine_command_table[]; 161 #endif 162 163 static const struct db_command db_command_table[] = { 164 { "b", db_breakpoint_cmd, 0, NULL }, 165 { "break", db_breakpoint_cmd, 0, NULL }, 166 { "bt", db_stack_trace_cmd, 0, NULL }, 167 { "c", db_continue_cmd, 0, NULL }, 168 { "call", db_fncall, CS_OWN, NULL }, 169 { "callout", db_show_callout, 0, NULL }, 170 { "continue", db_continue_cmd, 0, NULL }, 171 { "d", db_delete_cmd, 0, NULL }, 172 { "delete", db_delete_cmd, 0, NULL }, 173 { "dmesg", db_dmesg, 0, NULL }, 174 { "dwatch", db_deletewatch_cmd, 0, NULL }, 175 { "examine", db_examine_cmd, CS_SET_DOT, NULL }, 176 { "kill", db_kill_proc, CS_OWN, NULL }, 177 #ifdef KGDB 178 { "kgdb", db_kgdb_cmd, 0, NULL }, 179 #endif 180 #ifdef DB_MACHINE_COMMANDS 181 { "machine", NULL, 0, db_machine_command_table }, 182 #endif 183 { "match", db_trace_until_matching_cmd,0, NULL }, 184 { "next", db_trace_until_matching_cmd,0, NULL }, 185 { "p", db_print_cmd, 0, NULL }, 186 { "print", db_print_cmd, 0, NULL }, 187 { "ps", db_show_all_procs, 0, NULL }, 188 { "reboot", db_reboot_cmd, CS_OWN, NULL }, 189 { "s", db_single_step_cmd, 0, NULL }, 190 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, 191 { "set", db_set_cmd, CS_OWN, NULL }, 192 { "show", NULL, 0, db_show_cmds }, 193 { "sifting", db_sifting_cmd, CS_OWN, NULL }, 194 { "step", db_single_step_cmd, 0, NULL }, 195 { "sync", db_sync_cmd, CS_OWN, NULL }, 196 { "trace", db_stack_trace_cmd, 0, NULL }, 197 { "until", db_trace_until_call_cmd,0, NULL }, 198 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 199 { "watch", db_watchpoint_cmd, CS_MORE, NULL }, 200 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 201 { "x", db_examine_cmd, CS_SET_DOT, NULL }, 202 { NULL, NULL, 0, NULL } 203 }; 204 205 static const struct db_command *db_last_command = NULL; 206 #if defined(DDB_COMMANDONENTER) 207 char db_cmd_on_enter[DB_LINE_MAXLEN + 1] = ___STRING(DDB_COMMANDONENTER); 208 #else /* defined(DDB_COMMANDONENTER) */ 209 char db_cmd_on_enter[DB_LINE_MAXLEN + 1] = ""; 210 #endif /* defined(DDB_COMMANDONENTER) */ 211 #define DB_LINE_SEP ';' 212 213 /* 214 * Utility routine - discard tokens through end-of-line. 215 */ 216 void 217 db_skip_to_eol(void) 218 { 219 int t; 220 221 do { 222 t = db_read_token(); 223 } while (t != tEOL); 224 } 225 226 void 227 db_error(s) 228 const char *s; 229 { 230 231 if (s) 232 db_printf("%s", s); 233 db_flush_lex(); 234 longjmp(db_recover); 235 } 236 237 static void 238 db_execute_commandlist(const char *cmdlist) 239 { 240 const char *cmd = cmdlist; 241 const struct db_command *dummy = NULL; 242 243 while (*cmd != '\0') { 244 const char *ep = cmd; 245 246 while (*ep != '\0' && *ep != DB_LINE_SEP) { 247 ep++; 248 } 249 db_set_line(cmd, ep); 250 db_command(&dummy, db_command_table); 251 cmd = ep; 252 if (*cmd == DB_LINE_SEP) { 253 cmd++; 254 } 255 } 256 } 257 258 void 259 db_command_loop(void) 260 { 261 label_t db_jmpbuf; 262 label_t *savejmp; 263 264 /* 265 * Initialize 'prev' and 'next' to dot. 266 */ 267 db_prev = db_dot; 268 db_next = db_dot; 269 270 db_cmd_loop_done = 0; 271 272 savejmp = db_recover; 273 db_recover = &db_jmpbuf; 274 (void) setjmp(&db_jmpbuf); 275 276 db_execute_commandlist(db_cmd_on_enter); 277 278 while (!db_cmd_loop_done) { 279 if (db_print_position() != 0) 280 db_printf("\n"); 281 db_output_line = 0; 282 283 284 #ifdef MULTIPROCESSOR 285 db_printf("db{%ld}> ", (long)cpu_number()); 286 #else 287 db_printf("db> "); 288 #endif 289 (void) db_read_line(); 290 291 db_command(&db_last_command, db_command_table); 292 } 293 294 db_recover = savejmp; 295 } 296 297 /* 298 * Search for command prefix. 299 */ 300 static int 301 db_cmd_search(const char *name, const struct db_command *table, 302 const struct db_command **cmdp) 303 { 304 const struct db_command *cmd; 305 int result = CMD_NONE; 306 307 for (cmd = table; cmd->name != 0; cmd++) { 308 const char *lp; 309 const char *rp; 310 int c; 311 312 lp = name; 313 rp = cmd->name; 314 while ((c = *lp) == *rp) { 315 if (c == 0) { 316 /* complete match */ 317 *cmdp = cmd; 318 return (CMD_UNIQUE); 319 } 320 lp++; 321 rp++; 322 } 323 if (c == 0) { 324 /* end of name, not end of command - 325 partial match */ 326 if (result == CMD_FOUND) { 327 result = CMD_AMBIGUOUS; 328 /* but keep looking for a full match - 329 this lets us match single letters */ 330 } else { 331 *cmdp = cmd; 332 result = CMD_FOUND; 333 } 334 } 335 } 336 if (result == CMD_NONE) { 337 /* check for 'help' */ 338 if (name[0] == 'h' && name[1] == 'e' 339 && name[2] == 'l' && name[3] == 'p') 340 result = CMD_HELP; 341 } 342 return (result); 343 } 344 345 static void 346 db_cmd_list(const struct db_command *table) 347 { 348 int i, j, w, columns, lines, width=0, numcmds; 349 const char *p; 350 351 for (numcmds = 0; table[numcmds].name != NULL; numcmds++) { 352 w = strlen(table[numcmds].name); 353 if (w > width) 354 width = w; 355 } 356 width = DB_NEXT_TAB(width); 357 358 columns = db_max_width / width; 359 if (columns == 0) 360 columns = 1; 361 lines = (numcmds + columns - 1) / columns; 362 for (i = 0; i < lines; i++) { 363 for (j = 0; j < columns; j++) { 364 p = table[j * lines + i].name; 365 if (p) 366 db_printf("%s", p); 367 if (j * lines + i + lines >= numcmds) { 368 db_putchar('\n'); 369 break; 370 } 371 w = strlen(p); 372 while (w < width) { 373 w = DB_NEXT_TAB(w); 374 db_putchar('\t'); 375 } 376 } 377 } 378 } 379 380 static void 381 db_command(const struct db_command **last_cmdp, 382 const struct db_command *cmd_table) 383 { 384 const struct db_command *cmd; 385 int t; 386 char modif[TOK_STRING_SIZE]; 387 db_expr_t addr, count; 388 boolean_t have_addr = FALSE; 389 int result; 390 391 static db_expr_t last_count = 0; 392 393 t = db_read_token(); 394 if ((t == tEOL) || (t == tCOMMA)) { 395 /* 396 * An empty line repeats last command, at 'next'. 397 * Only a count repeats the last command with the new count. 398 */ 399 cmd = *last_cmdp; 400 addr = (db_expr_t)db_next; 401 if (t == tCOMMA) { 402 if (!db_expression(&count)) { 403 db_printf("Count missing\n"); 404 db_flush_lex(); 405 return; 406 } 407 } else 408 count = last_count; 409 have_addr = FALSE; 410 modif[0] = '\0'; 411 db_skip_to_eol(); 412 } else if (t == tEXCL) { 413 db_fncall(0, 0, 0, NULL); 414 return; 415 } else if (t != tIDENT) { 416 db_printf("?\n"); 417 db_flush_lex(); 418 return; 419 } else { 420 /* 421 * Search for command 422 */ 423 while (cmd_table) { 424 result = db_cmd_search(db_tok_string, cmd_table, &cmd); 425 switch (result) { 426 case CMD_NONE: 427 db_printf("No such command\n"); 428 db_flush_lex(); 429 return; 430 case CMD_AMBIGUOUS: 431 db_printf("Ambiguous\n"); 432 db_flush_lex(); 433 return; 434 case CMD_HELP: 435 db_cmd_list(cmd_table); 436 db_flush_lex(); 437 return; 438 default: 439 break; 440 } 441 if ((cmd_table = cmd->more) != 0) { 442 t = db_read_token(); 443 if (t != tIDENT) { 444 db_cmd_list(cmd_table); 445 db_flush_lex(); 446 return; 447 } 448 } 449 } 450 451 if ((cmd->flag & CS_OWN) == 0) { 452 /* 453 * Standard syntax: 454 * command [/modifier] [addr] [,count] 455 */ 456 t = db_read_token(); 457 if (t == tSLASH) { 458 t = db_read_token(); 459 if (t != tIDENT) { 460 db_printf("Bad modifier\n"); 461 db_flush_lex(); 462 return; 463 } 464 strlcpy(modif, db_tok_string, sizeof(modif)); 465 } else { 466 db_unread_token(t); 467 modif[0] = '\0'; 468 } 469 470 if (db_expression(&addr)) { 471 db_dot = (db_addr_t) addr; 472 db_last_addr = db_dot; 473 have_addr = TRUE; 474 } else { 475 addr = (db_expr_t) db_dot; 476 have_addr = FALSE; 477 } 478 t = db_read_token(); 479 if (t == tCOMMA) { 480 if (!db_expression(&count)) { 481 db_printf("Count missing\n"); 482 db_flush_lex(); 483 return; 484 } 485 } else { 486 db_unread_token(t); 487 count = -1; 488 } 489 if ((cmd->flag & CS_MORE) == 0) { 490 db_skip_to_eol(); 491 } 492 } 493 } 494 *last_cmdp = cmd; 495 last_count = count; 496 if (cmd != 0) { 497 /* 498 * Execute the command. 499 */ 500 (*cmd->fcn)(addr, have_addr, count, modif); 501 502 if (cmd->flag & CS_SET_DOT) { 503 /* 504 * If command changes dot, set dot to 505 * previous address displayed (if 'ed' style). 506 */ 507 if (db_ed_style) 508 db_dot = db_prev; 509 else 510 db_dot = db_next; 511 } else { 512 /* 513 * If command does not change dot, 514 * set 'next' location to be the same. 515 */ 516 db_next = db_dot; 517 } 518 } 519 } 520 521 /*ARGSUSED*/ 522 static void 523 db_map_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 524 { 525 boolean_t full = FALSE; 526 527 if (modif[0] == 'f') 528 full = TRUE; 529 530 if (have_addr == FALSE) 531 addr = (db_expr_t)(intptr_t) kernel_map; 532 533 uvm_map_printit((struct vm_map *)(intptr_t) addr, full, db_printf); 534 } 535 536 /*ARGSUSED*/ 537 static void 538 db_malloc_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 539 { 540 541 #ifdef MALLOC_DEBUG 542 if (!have_addr) 543 addr = 0; 544 545 debug_malloc_printit(db_printf, (vaddr_t) addr); 546 #else 547 db_printf("The kernel is not built with the MALLOC_DEBUG option.\n"); 548 #endif /* MALLOC_DEBUG */ 549 } 550 551 /*ARGSUSED*/ 552 static void 553 db_object_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 554 { 555 boolean_t full = FALSE; 556 557 if (modif[0] == 'f') 558 full = TRUE; 559 560 uvm_object_printit((struct uvm_object *)(intptr_t) addr, full, 561 db_printf); 562 } 563 564 /*ARGSUSED*/ 565 static void 566 db_page_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 567 { 568 boolean_t full = FALSE; 569 570 if (modif[0] == 'f') 571 full = TRUE; 572 573 uvm_page_printit((struct vm_page *)(intptr_t) addr, full, db_printf); 574 } 575 576 /*ARGSUSED*/ 577 static void 578 db_buf_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 579 { 580 boolean_t full = FALSE; 581 582 if (modif[0] == 'f') 583 full = TRUE; 584 585 vfs_buf_print((struct buf *)(intptr_t) addr, full, db_printf); 586 } 587 588 /*ARGSUSED*/ 589 static void 590 db_event_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 591 { 592 boolean_t full = FALSE; 593 594 if (modif[0] == 'f') 595 full = TRUE; 596 597 event_print(full, db_printf); 598 } 599 600 /*ARGSUSED*/ 601 static void 602 db_vnode_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 603 { 604 boolean_t full = FALSE; 605 606 if (modif[0] == 'f') 607 full = TRUE; 608 609 vfs_vnode_print((struct vnode *)(intptr_t) addr, full, db_printf); 610 } 611 612 static void 613 db_mount_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 614 { 615 boolean_t full = FALSE; 616 617 if (modif[0] == 'f') 618 full = TRUE; 619 620 vfs_mount_print((struct mount *)(intptr_t) addr, full, db_printf); 621 } 622 623 /*ARGSUSED*/ 624 static void 625 db_pool_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 626 { 627 628 pool_printit((struct pool *)(intptr_t) addr, modif, db_printf); 629 } 630 631 /*ARGSUSED*/ 632 static void 633 db_namecache_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, 634 const char *modif) 635 { 636 637 namecache_print((struct vnode *)(intptr_t) addr, db_printf); 638 } 639 640 /*ARGSUSED*/ 641 static void 642 db_uvmexp_print_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 643 { 644 645 uvmexp_print(db_printf); 646 } 647 648 /* 649 * Call random function: 650 * !expr(arg,arg,arg) 651 */ 652 /*ARGSUSED*/ 653 static void 654 db_fncall(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 655 { 656 db_expr_t fn_addr; 657 #define MAXARGS 11 658 db_expr_t args[MAXARGS]; 659 int nargs = 0; 660 db_expr_t retval; 661 db_expr_t (*func)(db_expr_t, ...); 662 int t; 663 664 if (!db_expression(&fn_addr)) { 665 db_printf("Bad function\n"); 666 db_flush_lex(); 667 return; 668 } 669 func = (db_expr_t (*)(db_expr_t, ...))(intptr_t) fn_addr; 670 671 t = db_read_token(); 672 if (t == tLPAREN) { 673 if (db_expression(&args[0])) { 674 nargs++; 675 while ((t = db_read_token()) == tCOMMA) { 676 if (nargs == MAXARGS) { 677 db_printf("Too many arguments\n"); 678 db_flush_lex(); 679 return; 680 } 681 if (!db_expression(&args[nargs])) { 682 db_printf("Argument missing\n"); 683 db_flush_lex(); 684 return; 685 } 686 nargs++; 687 } 688 db_unread_token(t); 689 } 690 if (db_read_token() != tRPAREN) { 691 db_printf("?\n"); 692 db_flush_lex(); 693 return; 694 } 695 } 696 db_skip_to_eol(); 697 698 while (nargs < MAXARGS) { 699 args[nargs++] = 0; 700 } 701 702 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 703 args[5], args[6], args[7], args[8], args[9]); 704 db_printf("%s\n", db_num_to_str(retval)); 705 } 706 707 static void 708 db_reboot_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 709 { 710 db_expr_t bootflags; 711 712 /* Flags, default to RB_AUTOBOOT */ 713 if (!db_expression(&bootflags)) 714 bootflags = (db_expr_t)RB_AUTOBOOT; 715 if (db_read_token() != tEOL) { 716 db_error("?\n"); 717 /*NOTREACHED*/ 718 } 719 /* 720 * We are leaving DDB, never to return upward. 721 * Clear db_recover so that we can debug faults in functions 722 * called from cpu_reboot. 723 */ 724 db_recover = 0; 725 cpu_reboot((int)bootflags, NULL); 726 } 727 728 static void 729 db_sifting_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 730 { 731 int mode, t; 732 733 t = db_read_token(); 734 if (t == tSLASH) { 735 t = db_read_token(); 736 if (t != tIDENT) { 737 bad_modifier: 738 db_printf("Bad modifier\n"); 739 db_flush_lex(); 740 return; 741 } 742 if (!strcmp(db_tok_string, "F")) 743 mode = 'F'; 744 else 745 goto bad_modifier; 746 t = db_read_token(); 747 } else 748 mode = 0; 749 750 if (t == tIDENT) 751 db_sifting(db_tok_string, mode); 752 else { 753 db_printf("Bad argument (non-string)\n"); 754 db_flush_lex(); 755 } 756 } 757 758 static void 759 db_stack_trace_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 760 { 761 register const char *cp = modif; 762 register char c; 763 void (*pr)(const char *, ...); 764 765 pr = db_printf; 766 while ((c = *cp++) != 0) 767 if (c == 'l') 768 pr = printf; 769 770 if (count == -1) 771 count = 65535; 772 773 db_stack_trace_print(addr, have_addr, count, modif, pr); 774 } 775 776 static void 777 db_sync_cmd(db_expr_t addr, int have_addr, db_expr_t count, const char *modif) 778 { 779 780 /* 781 * We are leaving DDB, never to return upward. 782 * Clear db_recover so that we can debug faults in functions 783 * called from cpu_reboot. 784 */ 785 db_recover = 0; 786 cpu_reboot(RB_DUMP, NULL); 787 } 788
Indexes created Mon Sep 22 13:09:51 GMT 2025