db_command.c revision 1.38
1 /* $NetBSD: db_command.c,v 1.38 2000/04/13 22:48:29 jhawk 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 #include "opt_ddb.h" 30 31 /* 32 * Command dispatcher. 33 */ 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/reboot.h> 37 #include <sys/proc.h> 38 #include <sys/vnode.h> 39 #include <sys/pool.h> 40 41 #include <machine/db_machdep.h> /* type definitions */ 42 43 #if defined(_KERNEL) && !defined(_LKM) 44 #include "opt_multiprocessor.h" 45 #endif 46 #ifdef MULTIPROCESSOR 47 #include <machine/cpu.h> 48 #endif 49 50 #include <ddb/db_lex.h> 51 #include <ddb/db_output.h> 52 #include <ddb/db_command.h> 53 #include <ddb/db_break.h> 54 #include <ddb/db_watch.h> 55 #include <ddb/db_run.h> 56 #include <ddb/db_variables.h> 57 #include <ddb/db_interface.h> 58 #include <ddb/db_sym.h> 59 #include <ddb/db_extern.h> 60 61 #include <vm/vm.h> 62 63 #include <uvm/uvm_extern.h> 64 #include <uvm/uvm_ddb.h> 65 66 /* 67 * Exported global variables 68 */ 69 boolean_t db_cmd_loop_done; 70 label_t *db_recover; 71 72 /* 73 * if 'ed' style: 'dot' is set at start of last item printed, 74 * and '+' points to next line. 75 * Otherwise: 'dot' points to next item, '..' points to last. 76 */ 77 boolean_t db_ed_style = TRUE; 78 79 /* 80 * Utility routine - discard tokens through end-of-line. 81 */ 82 void 83 db_skip_to_eol() 84 { 85 int t; 86 do { 87 t = db_read_token(); 88 } while (t != tEOL); 89 } 90 91 /* 92 * Results of command search. 93 */ 94 #define CMD_UNIQUE 0 95 #define CMD_FOUND 1 96 #define CMD_NONE 2 97 #define CMD_AMBIGUOUS 3 98 #define CMD_HELP 4 99 100 /* 101 * Search for command prefix. 102 */ 103 int 104 db_cmd_search(name, table, cmdp) 105 char *name; 106 struct db_command *table; 107 struct db_command **cmdp; /* out */ 108 { 109 struct db_command *cmd; 110 int result = CMD_NONE; 111 112 for (cmd = table; cmd->name != 0; cmd++) { 113 char *lp; 114 char *rp; 115 int c; 116 117 lp = name; 118 rp = cmd->name; 119 while ((c = *lp) == *rp) { 120 if (c == 0) { 121 /* complete match */ 122 *cmdp = cmd; 123 return (CMD_UNIQUE); 124 } 125 lp++; 126 rp++; 127 } 128 if (c == 0) { 129 /* end of name, not end of command - 130 partial match */ 131 if (result == CMD_FOUND) { 132 result = CMD_AMBIGUOUS; 133 /* but keep looking for a full match - 134 this lets us match single letters */ 135 } 136 else { 137 *cmdp = cmd; 138 result = CMD_FOUND; 139 } 140 } 141 } 142 if (result == CMD_NONE) { 143 /* check for 'help' */ 144 if (name[0] == 'h' && name[1] == 'e' 145 && name[2] == 'l' && name[3] == 'p') 146 result = CMD_HELP; 147 } 148 return (result); 149 } 150 151 void 152 db_cmd_list(table) 153 struct db_command *table; 154 { 155 int i, j, w, columns, lines, width=0, items, numcmds; 156 char *p; 157 158 for (numcmds = 0; table[numcmds].name != NULL; numcmds++) { 159 w = strlen(table[numcmds].name); 160 if (w > width) 161 width = w; 162 } 163 width = DB_NEXT_TAB(width); 164 items = 0; 165 166 columns = db_max_width / width; 167 if (columns == 0) 168 columns = 1; 169 lines = (numcmds + columns - 1) / columns; 170 for (i = 0; i < lines; i++) { 171 for (j = 0; j < columns; j++) { 172 p = table[j * lines + i].name; 173 if (p) 174 db_printf("%s", p); 175 if (j * lines + i + lines >= numcmds) { 176 db_putchar('\n'); 177 break; 178 } 179 w = strlen(p); 180 while (w < width) { 181 w = DB_NEXT_TAB(w); 182 db_putchar('\t'); 183 } 184 } 185 } 186 } 187 188 void 189 db_command(last_cmdp, cmd_table) 190 struct db_command **last_cmdp; /* IN_OUT */ 191 struct db_command *cmd_table; 192 { 193 struct db_command *cmd; 194 int t; 195 char modif[TOK_STRING_SIZE]; 196 db_expr_t addr, count; 197 boolean_t have_addr = FALSE; 198 int result; 199 200 static db_expr_t last_count = 0; 201 202 t = db_read_token(); 203 if ((t == tEOL) || (t == tCOMMA)) { 204 /* 205 * An empty line repeats last command, at 'next'. 206 * Only a count repeats the last command with the new count. 207 */ 208 cmd = *last_cmdp; 209 addr = (db_expr_t)db_next; 210 if (t == tCOMMA) { 211 if (!db_expression(&count)) { 212 db_printf("Count missing\n"); 213 db_flush_lex(); 214 return; 215 } 216 } else 217 count = last_count; 218 have_addr = FALSE; 219 modif[0] = '\0'; 220 } 221 else if (t == tEXCL) { 222 db_fncall(0, 0, 0, NULL); 223 return; 224 } 225 else if (t != tIDENT) { 226 db_printf("?\n"); 227 db_flush_lex(); 228 return; 229 } 230 else { 231 /* 232 * Search for command 233 */ 234 while (cmd_table) { 235 result = db_cmd_search(db_tok_string, 236 cmd_table, 237 &cmd); 238 switch (result) { 239 case CMD_NONE: 240 db_printf("No such command\n"); 241 db_flush_lex(); 242 return; 243 case CMD_AMBIGUOUS: 244 db_printf("Ambiguous\n"); 245 db_flush_lex(); 246 return; 247 case CMD_HELP: 248 db_cmd_list(cmd_table); 249 db_flush_lex(); 250 return; 251 default: 252 break; 253 } 254 if ((cmd_table = cmd->more) != 0) { 255 t = db_read_token(); 256 if (t != tIDENT) { 257 db_cmd_list(cmd_table); 258 db_flush_lex(); 259 return; 260 } 261 } 262 } 263 264 if ((cmd->flag & CS_OWN) == 0) { 265 /* 266 * Standard syntax: 267 * command [/modifier] [addr] [,count] 268 */ 269 t = db_read_token(); 270 if (t == tSLASH) { 271 t = db_read_token(); 272 if (t != tIDENT) { 273 db_printf("Bad modifier\n"); 274 db_flush_lex(); 275 return; 276 } 277 db_strcpy(modif, db_tok_string); 278 } 279 else { 280 db_unread_token(t); 281 modif[0] = '\0'; 282 } 283 284 if (db_expression(&addr)) { 285 db_dot = (db_addr_t) addr; 286 db_last_addr = db_dot; 287 have_addr = TRUE; 288 } 289 else { 290 addr = (db_expr_t) db_dot; 291 have_addr = FALSE; 292 } 293 t = db_read_token(); 294 if (t == tCOMMA) { 295 if (!db_expression(&count)) { 296 db_printf("Count missing\n"); 297 db_flush_lex(); 298 return; 299 } 300 } 301 else { 302 db_unread_token(t); 303 count = -1; 304 } 305 if ((cmd->flag & CS_MORE) == 0) { 306 db_skip_to_eol(); 307 } 308 } 309 } 310 *last_cmdp = cmd; 311 last_count = count; 312 if (cmd != 0) { 313 /* 314 * Execute the command. 315 */ 316 (*cmd->fcn)(addr, have_addr, count, modif); 317 318 if (cmd->flag & CS_SET_DOT) { 319 /* 320 * If command changes dot, set dot to 321 * previous address displayed (if 'ed' style). 322 */ 323 if (db_ed_style) { 324 db_dot = db_prev; 325 } 326 else { 327 db_dot = db_next; 328 } 329 } 330 else { 331 /* 332 * If command does not change dot, 333 * set 'next' location to be the same. 334 */ 335 db_next = db_dot; 336 } 337 } 338 } 339 340 /*ARGSUSED*/ 341 void 342 db_map_print_cmd(addr, have_addr, count, modif) 343 db_expr_t addr; 344 int have_addr; 345 db_expr_t count; 346 char * modif; 347 { 348 boolean_t full = FALSE; 349 350 if (modif[0] == 'f') 351 full = TRUE; 352 353 uvm_map_printit((vm_map_t) addr, full, db_printf); 354 } 355 356 /*ARGSUSED*/ 357 void 358 db_object_print_cmd(addr, have_addr, count, modif) 359 db_expr_t addr; 360 int have_addr; 361 db_expr_t count; 362 char * modif; 363 { 364 boolean_t full = FALSE; 365 366 if (modif[0] == 'f') 367 full = TRUE; 368 369 uvm_object_printit((struct uvm_object *) addr, full, db_printf); 370 } 371 372 /*ARGSUSED*/ 373 void 374 db_page_print_cmd(addr, have_addr, count, modif) 375 db_expr_t addr; 376 int have_addr; 377 db_expr_t count; 378 char * modif; 379 { 380 boolean_t full = FALSE; 381 382 if (modif[0] == 'f') 383 full = TRUE; 384 385 uvm_page_printit((struct vm_page *) addr, full, db_printf); 386 } 387 388 /*ARGSUSED*/ 389 void 390 db_buf_print_cmd(addr, have_addr, count, modif) 391 db_expr_t addr; 392 int have_addr; 393 db_expr_t count; 394 char * modif; 395 { 396 boolean_t full = FALSE; 397 398 if (modif[0] == 'f') 399 full = TRUE; 400 401 vfs_buf_print((struct buf *)addr, full, db_printf); 402 } 403 404 /*ARGSUSED*/ 405 void 406 db_vnode_print_cmd(addr, have_addr, count, modif) 407 db_expr_t addr; 408 int have_addr; 409 db_expr_t count; 410 char * modif; 411 { 412 boolean_t full = FALSE; 413 414 if (modif[0] == 'f') 415 full = TRUE; 416 417 vfs_vnode_print((struct vnode *)addr, full, db_printf); 418 } 419 420 /*ARGSUSED*/ 421 void 422 db_pool_print_cmd(addr, have_addr, count, modif) 423 db_expr_t addr; 424 int have_addr; 425 db_expr_t count; 426 char * modif; 427 { 428 429 pool_printit((struct pool *) addr, modif, db_printf); 430 } 431 432 /* 433 * 'show' commands 434 */ 435 436 struct db_command db_show_all_cmds[] = { 437 { "callout", db_show_callout, 0, NULL }, 438 { "procs", db_show_all_procs, 0, NULL }, 439 { NULL, NULL, 0, NULL } 440 }; 441 442 struct db_command db_show_cmds[] = { 443 { "all", NULL, 0, db_show_all_cmds }, 444 { "breaks", db_listbreak_cmd, 0, NULL }, 445 { "map", db_map_print_cmd, 0, NULL }, 446 { "object", db_object_print_cmd, 0, NULL }, 447 { "page", db_page_print_cmd, 0, NULL }, 448 { "buf", db_buf_print_cmd, 0, NULL }, 449 { "vnode", db_vnode_print_cmd, 0, NULL }, 450 { "pool", db_pool_print_cmd, 0, NULL }, 451 { "registers", db_show_regs, 0, NULL }, 452 { "watches", db_listwatch_cmd, 0, NULL }, 453 { NULL, NULL, 0, NULL } 454 }; 455 456 struct db_command db_command_table[] = { 457 { "break", db_breakpoint_cmd, 0, NULL }, 458 { "c", db_continue_cmd, 0, NULL }, 459 { "call", db_fncall, CS_OWN, NULL }, 460 { "callout", db_show_callout, 0, NULL }, 461 { "continue", db_continue_cmd, 0, NULL }, 462 { "d", db_delete_cmd, 0, NULL }, 463 { "delete", db_delete_cmd, 0, NULL }, 464 { "dwatch", db_deletewatch_cmd, 0, NULL }, 465 { "examine", db_examine_cmd, CS_SET_DOT, NULL }, 466 { "kill", db_kill_proc, CS_OWN, NULL }, 467 #ifdef DB_MACHINE_COMMANDS 468 { "machine", NULL, 0, NULL }, 469 #endif 470 { "match", db_trace_until_matching_cmd,0, NULL }, 471 { "next", db_trace_until_matching_cmd,0, NULL }, 472 { "print", db_print_cmd, 0, NULL }, 473 { "ps", db_show_all_procs, 0, NULL }, 474 { "reboot", db_reboot_cmd, CS_OWN, NULL }, 475 { "s", db_single_step_cmd, 0, NULL }, 476 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, 477 { "set", db_set_cmd, CS_OWN, NULL }, 478 { "show", NULL, 0, db_show_cmds }, 479 { "step", db_single_step_cmd, 0, NULL }, 480 { "sync", db_sync_cmd, CS_OWN, NULL }, 481 { "trace", db_stack_trace_cmd, 0, NULL }, 482 { "until", db_trace_until_call_cmd,0, NULL }, 483 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 484 { "watch", db_watchpoint_cmd, CS_MORE, NULL }, 485 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 486 { "x", db_examine_cmd, CS_SET_DOT, NULL }, 487 { NULL, NULL, 0, NULL } 488 }; 489 490 #ifdef DB_MACHINE_COMMANDS 491 492 /* 493 * this function should be called to install the machine dependent 494 * commands. It should be called before the debugger is enabled 495 */ 496 void 497 db_machine_commands_install(ptr) 498 struct db_command *ptr; 499 { 500 struct db_command *cmd; 501 502 for (cmd = db_command_table; cmd != 0; cmd++) { 503 if (strcmp(cmd->name, "machine") == 0) { 504 cmd->more = ptr; 505 break; 506 } 507 } 508 } 509 510 #endif 511 512 struct db_command *db_last_command = 0; 513 514 void 515 db_command_loop() 516 { 517 label_t db_jmpbuf; 518 label_t *savejmp; 519 extern int db_output_line; 520 521 /* 522 * Initialize 'prev' and 'next' to dot. 523 */ 524 db_prev = db_dot; 525 db_next = db_dot; 526 527 db_cmd_loop_done = 0; 528 529 savejmp = db_recover; 530 db_recover = &db_jmpbuf; 531 (void) setjmp(&db_jmpbuf); 532 533 while (!db_cmd_loop_done) { 534 if (db_print_position() != 0) 535 db_printf("\n"); 536 db_output_line = 0; 537 538 #ifdef MULTIPROCESSOR 539 db_printf("(cpu %d)", cpu_number()); 540 #endif 541 db_printf("db> "); 542 (void) db_read_line(); 543 544 db_command(&db_last_command, db_command_table); 545 } 546 547 db_recover = savejmp; 548 } 549 550 void 551 db_error(s) 552 char *s; 553 { 554 if (s) 555 db_printf(s); 556 db_flush_lex(); 557 longjmp(db_recover); 558 } 559 560 561 /* 562 * Call random function: 563 * !expr(arg,arg,arg) 564 */ 565 /*ARGSUSED*/ 566 void 567 db_fncall(addr, have_addr, count, modif) 568 db_expr_t addr; 569 int have_addr; 570 db_expr_t count; 571 char * modif; 572 { 573 db_expr_t fn_addr; 574 #define MAXARGS 11 575 db_expr_t args[MAXARGS]; 576 int nargs = 0; 577 db_expr_t retval; 578 db_expr_t (*func) __P((db_expr_t, ...)); 579 int t; 580 581 if (!db_expression(&fn_addr)) { 582 db_printf("Bad function\n"); 583 db_flush_lex(); 584 return; 585 } 586 func = (db_expr_t (*) __P((db_expr_t, ...))) fn_addr; 587 588 t = db_read_token(); 589 if (t == tLPAREN) { 590 if (db_expression(&args[0])) { 591 nargs++; 592 while ((t = db_read_token()) == tCOMMA) { 593 if (nargs == MAXARGS) { 594 db_printf("Too many arguments\n"); 595 db_flush_lex(); 596 return; 597 } 598 if (!db_expression(&args[nargs])) { 599 db_printf("Argument missing\n"); 600 db_flush_lex(); 601 return; 602 } 603 nargs++; 604 } 605 db_unread_token(t); 606 } 607 if (db_read_token() != tRPAREN) { 608 db_printf("?\n"); 609 db_flush_lex(); 610 return; 611 } 612 } 613 db_skip_to_eol(); 614 615 while (nargs < MAXARGS) { 616 args[nargs++] = 0; 617 } 618 619 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 620 args[5], args[6], args[7], args[8], args[9]); 621 db_printf("%#ln\n", retval); 622 } 623 624 void 625 db_reboot_cmd(addr, have_addr, count, modif) 626 db_expr_t addr; 627 int have_addr; 628 db_expr_t count; 629 char * modif; 630 { 631 db_expr_t bootflags; 632 633 /* Flags, default to RB_AUTOBOOT */ 634 if (!db_expression(&bootflags)) 635 bootflags = (db_expr_t)RB_AUTOBOOT; 636 if (db_read_token() != tEOL) { 637 db_error("?\n"); 638 /*NOTREACHED*/ 639 } 640 cpu_reboot((int)bootflags, NULL); 641 } 642 643 void 644 db_sync_cmd(addr, have_addr, count, modif) 645 db_expr_t addr; 646 int have_addr; 647 db_expr_t count; 648 char * modif; 649 { 650 651 cpu_reboot(RB_DUMP, NULL); 652 } 653
Indexes created Sat Sep 20 22:09:52 GMT 2025