db_command.c revision 1.37
1 /* $NetBSD: db_command.c,v 1.37 2000/04/11 02:21:16 chs 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 t = db_read_token(); 201 if (t == tEOL) { 202 /* empty line repeats last command, at 'next' */ 203 cmd = *last_cmdp; 204 addr = (db_expr_t)db_next; 205 have_addr = FALSE; 206 count = 1; 207 modif[0] = '\0'; 208 } 209 else if (t == tEXCL) { 210 db_fncall(0, 0, 0, NULL); 211 return; 212 } 213 else if (t != tIDENT) { 214 db_printf("?\n"); 215 db_flush_lex(); 216 return; 217 } 218 else { 219 /* 220 * Search for command 221 */ 222 while (cmd_table) { 223 result = db_cmd_search(db_tok_string, 224 cmd_table, 225 &cmd); 226 switch (result) { 227 case CMD_NONE: 228 db_printf("No such command\n"); 229 db_flush_lex(); 230 return; 231 case CMD_AMBIGUOUS: 232 db_printf("Ambiguous\n"); 233 db_flush_lex(); 234 return; 235 case CMD_HELP: 236 db_cmd_list(cmd_table); 237 db_flush_lex(); 238 return; 239 default: 240 break; 241 } 242 if ((cmd_table = cmd->more) != 0) { 243 t = db_read_token(); 244 if (t != tIDENT) { 245 db_cmd_list(cmd_table); 246 db_flush_lex(); 247 return; 248 } 249 } 250 } 251 252 if ((cmd->flag & CS_OWN) == 0) { 253 /* 254 * Standard syntax: 255 * command [/modifier] [addr] [,count] 256 */ 257 t = db_read_token(); 258 if (t == tSLASH) { 259 t = db_read_token(); 260 if (t != tIDENT) { 261 db_printf("Bad modifier\n"); 262 db_flush_lex(); 263 return; 264 } 265 db_strcpy(modif, db_tok_string); 266 } 267 else { 268 db_unread_token(t); 269 modif[0] = '\0'; 270 } 271 272 if (db_expression(&addr)) { 273 db_dot = (db_addr_t) addr; 274 db_last_addr = db_dot; 275 have_addr = TRUE; 276 } 277 else { 278 addr = (db_expr_t) db_dot; 279 have_addr = FALSE; 280 } 281 t = db_read_token(); 282 if (t == tCOMMA) { 283 if (!db_expression(&count)) { 284 db_printf("Count missing\n"); 285 db_flush_lex(); 286 return; 287 } 288 } 289 else { 290 db_unread_token(t); 291 count = -1; 292 } 293 if ((cmd->flag & CS_MORE) == 0) { 294 db_skip_to_eol(); 295 } 296 } 297 } 298 *last_cmdp = cmd; 299 if (cmd != 0) { 300 /* 301 * Execute the command. 302 */ 303 (*cmd->fcn)(addr, have_addr, count, modif); 304 305 if (cmd->flag & CS_SET_DOT) { 306 /* 307 * If command changes dot, set dot to 308 * previous address displayed (if 'ed' style). 309 */ 310 if (db_ed_style) { 311 db_dot = db_prev; 312 } 313 else { 314 db_dot = db_next; 315 } 316 } 317 else { 318 /* 319 * If command does not change dot, 320 * set 'next' location to be the same. 321 */ 322 db_next = db_dot; 323 } 324 } 325 } 326 327 /*ARGSUSED*/ 328 void 329 db_map_print_cmd(addr, have_addr, count, modif) 330 db_expr_t addr; 331 int have_addr; 332 db_expr_t count; 333 char * modif; 334 { 335 boolean_t full = FALSE; 336 337 if (modif[0] == 'f') 338 full = TRUE; 339 340 uvm_map_printit((vm_map_t) addr, full, db_printf); 341 } 342 343 /*ARGSUSED*/ 344 void 345 db_object_print_cmd(addr, have_addr, count, modif) 346 db_expr_t addr; 347 int have_addr; 348 db_expr_t count; 349 char * modif; 350 { 351 boolean_t full = FALSE; 352 353 if (modif[0] == 'f') 354 full = TRUE; 355 356 uvm_object_printit((struct uvm_object *) addr, full, db_printf); 357 } 358 359 /*ARGSUSED*/ 360 void 361 db_page_print_cmd(addr, have_addr, count, modif) 362 db_expr_t addr; 363 int have_addr; 364 db_expr_t count; 365 char * modif; 366 { 367 boolean_t full = FALSE; 368 369 if (modif[0] == 'f') 370 full = TRUE; 371 372 uvm_page_printit((struct vm_page *) addr, full, db_printf); 373 } 374 375 /*ARGSUSED*/ 376 void 377 db_buf_print_cmd(addr, have_addr, count, modif) 378 db_expr_t addr; 379 int have_addr; 380 db_expr_t count; 381 char * modif; 382 { 383 boolean_t full = FALSE; 384 385 if (modif[0] == 'f') 386 full = TRUE; 387 388 vfs_buf_print((struct buf *)addr, full, db_printf); 389 } 390 391 /*ARGSUSED*/ 392 void 393 db_vnode_print_cmd(addr, have_addr, count, modif) 394 db_expr_t addr; 395 int have_addr; 396 db_expr_t count; 397 char * modif; 398 { 399 boolean_t full = FALSE; 400 401 if (modif[0] == 'f') 402 full = TRUE; 403 404 vfs_vnode_print((struct vnode *)addr, full, db_printf); 405 } 406 407 /*ARGSUSED*/ 408 void 409 db_pool_print_cmd(addr, have_addr, count, modif) 410 db_expr_t addr; 411 int have_addr; 412 db_expr_t count; 413 char * modif; 414 { 415 416 pool_printit((struct pool *) addr, modif, db_printf); 417 } 418 419 /* 420 * 'show' commands 421 */ 422 423 struct db_command db_show_all_cmds[] = { 424 { "callout", db_show_callout, 0, NULL }, 425 { "procs", db_show_all_procs, 0, NULL }, 426 { NULL, NULL, 0, NULL } 427 }; 428 429 struct db_command db_show_cmds[] = { 430 { "all", NULL, 0, db_show_all_cmds }, 431 { "breaks", db_listbreak_cmd, 0, NULL }, 432 { "map", db_map_print_cmd, 0, NULL }, 433 { "object", db_object_print_cmd, 0, NULL }, 434 { "page", db_page_print_cmd, 0, NULL }, 435 { "buf", db_buf_print_cmd, 0, NULL }, 436 { "vnode", db_vnode_print_cmd, 0, NULL }, 437 { "pool", db_pool_print_cmd, 0, NULL }, 438 { "registers", db_show_regs, 0, NULL }, 439 { "watches", db_listwatch_cmd, 0, NULL }, 440 { NULL, NULL, 0, NULL } 441 }; 442 443 struct db_command db_command_table[] = { 444 { "break", db_breakpoint_cmd, 0, NULL }, 445 { "c", db_continue_cmd, 0, NULL }, 446 { "call", db_fncall, CS_OWN, NULL }, 447 { "callout", db_show_callout, 0, NULL }, 448 { "continue", db_continue_cmd, 0, NULL }, 449 { "d", db_delete_cmd, 0, NULL }, 450 { "delete", db_delete_cmd, 0, NULL }, 451 { "dwatch", db_deletewatch_cmd, 0, NULL }, 452 { "examine", db_examine_cmd, CS_SET_DOT, NULL }, 453 { "kill", db_kill_proc, CS_OWN, NULL }, 454 #ifdef DB_MACHINE_COMMANDS 455 { "machine", NULL, 0, NULL }, 456 #endif 457 { "match", db_trace_until_matching_cmd,0, NULL }, 458 { "next", db_trace_until_matching_cmd,0, NULL }, 459 { "print", db_print_cmd, 0, NULL }, 460 { "ps", db_show_all_procs, 0, NULL }, 461 { "reboot", db_reboot_cmd, CS_OWN, NULL }, 462 { "s", db_single_step_cmd, 0, NULL }, 463 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, 464 { "set", db_set_cmd, CS_OWN, NULL }, 465 { "show", NULL, 0, db_show_cmds }, 466 { "step", db_single_step_cmd, 0, NULL }, 467 { "sync", db_sync_cmd, CS_OWN, NULL }, 468 { "trace", db_stack_trace_cmd, 0, NULL }, 469 { "until", db_trace_until_call_cmd,0, NULL }, 470 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 471 { "watch", db_watchpoint_cmd, CS_MORE, NULL }, 472 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 473 { "x", db_examine_cmd, CS_SET_DOT, NULL }, 474 { NULL, NULL, 0, NULL } 475 }; 476 477 #ifdef DB_MACHINE_COMMANDS 478 479 /* 480 * this function should be called to install the machine dependent 481 * commands. It should be called before the debugger is enabled 482 */ 483 void 484 db_machine_commands_install(ptr) 485 struct db_command *ptr; 486 { 487 struct db_command *cmd; 488 489 for (cmd = db_command_table; cmd != 0; cmd++) { 490 if (strcmp(cmd->name, "machine") == 0) { 491 cmd->more = ptr; 492 break; 493 } 494 } 495 } 496 497 #endif 498 499 struct db_command *db_last_command = 0; 500 501 void 502 db_command_loop() 503 { 504 label_t db_jmpbuf; 505 label_t *savejmp; 506 extern int db_output_line; 507 508 /* 509 * Initialize 'prev' and 'next' to dot. 510 */ 511 db_prev = db_dot; 512 db_next = db_dot; 513 514 db_cmd_loop_done = 0; 515 516 savejmp = db_recover; 517 db_recover = &db_jmpbuf; 518 (void) setjmp(&db_jmpbuf); 519 520 while (!db_cmd_loop_done) { 521 if (db_print_position() != 0) 522 db_printf("\n"); 523 db_output_line = 0; 524 525 #ifdef MULTIPROCESSOR 526 db_printf("(cpu %d)", cpu_number()); 527 #endif 528 db_printf("db> "); 529 (void) db_read_line(); 530 531 db_command(&db_last_command, db_command_table); 532 } 533 534 db_recover = savejmp; 535 } 536 537 void 538 db_error(s) 539 char *s; 540 { 541 if (s) 542 db_printf(s); 543 db_flush_lex(); 544 longjmp(db_recover); 545 } 546 547 548 /* 549 * Call random function: 550 * !expr(arg,arg,arg) 551 */ 552 /*ARGSUSED*/ 553 void 554 db_fncall(addr, have_addr, count, modif) 555 db_expr_t addr; 556 int have_addr; 557 db_expr_t count; 558 char * modif; 559 { 560 db_expr_t fn_addr; 561 #define MAXARGS 11 562 db_expr_t args[MAXARGS]; 563 int nargs = 0; 564 db_expr_t retval; 565 db_expr_t (*func) __P((db_expr_t, ...)); 566 int t; 567 568 if (!db_expression(&fn_addr)) { 569 db_printf("Bad function\n"); 570 db_flush_lex(); 571 return; 572 } 573 func = (db_expr_t (*) __P((db_expr_t, ...))) fn_addr; 574 575 t = db_read_token(); 576 if (t == tLPAREN) { 577 if (db_expression(&args[0])) { 578 nargs++; 579 while ((t = db_read_token()) == tCOMMA) { 580 if (nargs == MAXARGS) { 581 db_printf("Too many arguments\n"); 582 db_flush_lex(); 583 return; 584 } 585 if (!db_expression(&args[nargs])) { 586 db_printf("Argument missing\n"); 587 db_flush_lex(); 588 return; 589 } 590 nargs++; 591 } 592 db_unread_token(t); 593 } 594 if (db_read_token() != tRPAREN) { 595 db_printf("?\n"); 596 db_flush_lex(); 597 return; 598 } 599 } 600 db_skip_to_eol(); 601 602 while (nargs < MAXARGS) { 603 args[nargs++] = 0; 604 } 605 606 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 607 args[5], args[6], args[7], args[8], args[9]); 608 db_printf("%#ln\n", retval); 609 } 610 611 void 612 db_reboot_cmd(addr, have_addr, count, modif) 613 db_expr_t addr; 614 int have_addr; 615 db_expr_t count; 616 char * modif; 617 { 618 db_expr_t bootflags; 619 620 /* Flags, default to RB_AUTOBOOT */ 621 if (!db_expression(&bootflags)) 622 bootflags = (db_expr_t)RB_AUTOBOOT; 623 if (db_read_token() != tEOL) { 624 db_error("?\n"); 625 /*NOTREACHED*/ 626 } 627 cpu_reboot((int)bootflags, NULL); 628 } 629 630 void 631 db_sync_cmd(addr, have_addr, count, modif) 632 db_expr_t addr; 633 int have_addr; 634 db_expr_t count; 635 char * modif; 636 { 637 638 cpu_reboot(RB_DUMP, NULL); 639 } 640
Indexes created Mon Sep 22 10:09:38 GMT 2025