db_command.c revision 1.28.2.2.2.2
1 /* $NetBSD: db_command.c,v 1.28.2.2.2.2 1999/06/21 01:16:20 thorpej 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 #include <ddb/db_lex.h> 44 #include <ddb/db_output.h> 45 #include <ddb/db_command.h> 46 #include <ddb/db_break.h> 47 #include <ddb/db_watch.h> 48 #include <ddb/db_run.h> 49 #include <ddb/db_variables.h> 50 #include <ddb/db_interface.h> 51 #include <ddb/db_sym.h> 52 #include <ddb/db_extern.h> 53 54 #include <vm/vm.h> 55 56 #include <uvm/uvm_extern.h> 57 #include <uvm/uvm_ddb.h> 58 59 /* 60 * Exported global variables 61 */ 62 boolean_t db_cmd_loop_done; 63 label_t *db_recover; 64 65 /* 66 * if 'ed' style: 'dot' is set at start of last item printed, 67 * and '+' points to next line. 68 * Otherwise: 'dot' points to next item, '..' points to last. 69 */ 70 boolean_t db_ed_style = TRUE; 71 72 /* 73 * Utility routine - discard tokens through end-of-line. 74 */ 75 void 76 db_skip_to_eol() 77 { 78 int t; 79 do { 80 t = db_read_token(); 81 } while (t != tEOL); 82 } 83 84 /* 85 * Results of command search. 86 */ 87 #define CMD_UNIQUE 0 88 #define CMD_FOUND 1 89 #define CMD_NONE 2 90 #define CMD_AMBIGUOUS 3 91 #define CMD_HELP 4 92 93 /* 94 * Search for command prefix. 95 */ 96 int 97 db_cmd_search(name, table, cmdp) 98 char *name; 99 struct db_command *table; 100 struct db_command **cmdp; /* out */ 101 { 102 struct db_command *cmd; 103 int result = CMD_NONE; 104 105 for (cmd = table; cmd->name != 0; cmd++) { 106 register char *lp; 107 register char *rp; 108 register int c; 109 110 lp = name; 111 rp = cmd->name; 112 while ((c = *lp) == *rp) { 113 if (c == 0) { 114 /* complete match */ 115 *cmdp = cmd; 116 return (CMD_UNIQUE); 117 } 118 lp++; 119 rp++; 120 } 121 if (c == 0) { 122 /* end of name, not end of command - 123 partial match */ 124 if (result == CMD_FOUND) { 125 result = CMD_AMBIGUOUS; 126 /* but keep looking for a full match - 127 this lets us match single letters */ 128 } 129 else { 130 *cmdp = cmd; 131 result = CMD_FOUND; 132 } 133 } 134 } 135 if (result == CMD_NONE) { 136 /* check for 'help' */ 137 if (name[0] == 'h' && name[1] == 'e' 138 && name[2] == 'l' && name[3] == 'p') 139 result = CMD_HELP; 140 } 141 return (result); 142 } 143 144 void 145 db_cmd_list(table) 146 struct db_command *table; 147 { 148 register struct db_command *cmd; 149 150 for (cmd = table; cmd->name != 0; cmd++) { 151 db_printf("%-12s", cmd->name); 152 db_end_line(); 153 } 154 } 155 156 void 157 db_command(last_cmdp, cmd_table) 158 struct db_command **last_cmdp; /* IN_OUT */ 159 struct db_command *cmd_table; 160 { 161 struct db_command *cmd; 162 int t; 163 char modif[TOK_STRING_SIZE]; 164 db_expr_t addr, count; 165 boolean_t have_addr = FALSE; 166 int result; 167 168 t = db_read_token(); 169 if (t == tEOL) { 170 /* empty line repeats last command, at 'next' */ 171 cmd = *last_cmdp; 172 addr = (db_expr_t)db_next; 173 have_addr = FALSE; 174 count = 1; 175 modif[0] = '\0'; 176 } 177 else if (t == tEXCL) { 178 db_fncall(0, 0, 0, NULL); 179 return; 180 } 181 else if (t != tIDENT) { 182 db_printf("?\n"); 183 db_flush_lex(); 184 return; 185 } 186 else { 187 /* 188 * Search for command 189 */ 190 while (cmd_table) { 191 result = db_cmd_search(db_tok_string, 192 cmd_table, 193 &cmd); 194 switch (result) { 195 case CMD_NONE: 196 db_printf("No such command\n"); 197 db_flush_lex(); 198 return; 199 case CMD_AMBIGUOUS: 200 db_printf("Ambiguous\n"); 201 db_flush_lex(); 202 return; 203 case CMD_HELP: 204 db_cmd_list(cmd_table); 205 db_flush_lex(); 206 return; 207 default: 208 break; 209 } 210 if ((cmd_table = cmd->more) != 0) { 211 t = db_read_token(); 212 if (t != tIDENT) { 213 db_cmd_list(cmd_table); 214 db_flush_lex(); 215 return; 216 } 217 } 218 } 219 220 if ((cmd->flag & CS_OWN) == 0) { 221 /* 222 * Standard syntax: 223 * command [/modifier] [addr] [,count] 224 */ 225 t = db_read_token(); 226 if (t == tSLASH) { 227 t = db_read_token(); 228 if (t != tIDENT) { 229 db_printf("Bad modifier\n"); 230 db_flush_lex(); 231 return; 232 } 233 db_strcpy(modif, db_tok_string); 234 } 235 else { 236 db_unread_token(t); 237 modif[0] = '\0'; 238 } 239 240 if (db_expression(&addr)) { 241 db_dot = (db_addr_t) addr; 242 db_last_addr = db_dot; 243 have_addr = TRUE; 244 } 245 else { 246 addr = (db_expr_t) db_dot; 247 have_addr = FALSE; 248 } 249 t = db_read_token(); 250 if (t == tCOMMA) { 251 if (!db_expression(&count)) { 252 db_printf("Count missing\n"); 253 db_flush_lex(); 254 return; 255 } 256 } 257 else { 258 db_unread_token(t); 259 count = -1; 260 } 261 if ((cmd->flag & CS_MORE) == 0) { 262 db_skip_to_eol(); 263 } 264 } 265 } 266 *last_cmdp = cmd; 267 if (cmd != 0) { 268 /* 269 * Execute the command. 270 */ 271 (*cmd->fcn)(addr, have_addr, count, modif); 272 273 if (cmd->flag & CS_SET_DOT) { 274 /* 275 * If command changes dot, set dot to 276 * previous address displayed (if 'ed' style). 277 */ 278 if (db_ed_style) { 279 db_dot = db_prev; 280 } 281 else { 282 db_dot = db_next; 283 } 284 } 285 else { 286 /* 287 * If command does not change dot, 288 * set 'next' location to be the same. 289 */ 290 db_next = db_dot; 291 } 292 } 293 } 294 295 /*ARGSUSED*/ 296 void 297 db_map_print_cmd(addr, have_addr, count, modif) 298 db_expr_t addr; 299 int have_addr; 300 db_expr_t count; 301 char * modif; 302 { 303 boolean_t full = FALSE; 304 305 if (modif[0] == 'f') 306 full = TRUE; 307 308 uvm_map_printit((vm_map_t) addr, full, db_printf); 309 } 310 311 /*ARGSUSED*/ 312 void 313 db_object_print_cmd(addr, have_addr, count, modif) 314 db_expr_t addr; 315 int have_addr; 316 db_expr_t count; 317 char * modif; 318 { 319 boolean_t full = FALSE; 320 321 if (modif[0] == 'f') 322 full = TRUE; 323 324 uvm_object_printit((struct uvm_object *) addr, full, db_printf); 325 } 326 327 /*ARGSUSED*/ 328 void 329 db_page_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_page_printit((struct vm_page *) addr, full, db_printf); 341 } 342 343 /*ARGSUSED*/ 344 void 345 db_buf_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 vfs_buf_print((struct buf *)addr, full, db_printf); 357 } 358 359 /*ARGSUSED*/ 360 void 361 db_vnode_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 vfs_vnode_print((struct vnode *) addr, full, db_printf); 373 } 374 375 /*ARGSUSED*/ 376 void 377 db_pool_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 { 383 384 pool_printit((struct pool *) addr, modif, db_printf); 385 } 386 387 /* 388 * 'show' commands 389 */ 390 391 struct db_command db_show_all_cmds[] = { 392 { "procs", db_show_all_procs, 0, NULL }, 393 { "callout", db_show_callout, 0, NULL }, 394 { NULL, NULL, 0, NULL } 395 }; 396 397 struct db_command db_show_cmds[] = { 398 { "all", NULL, 0, db_show_all_cmds }, 399 { "registers", db_show_regs, 0, NULL }, 400 { "breaks", db_listbreak_cmd, 0, NULL }, 401 { "watches", db_listwatch_cmd, 0, NULL }, 402 { "map", db_map_print_cmd, 0, NULL }, 403 { "object", db_object_print_cmd, 0, NULL }, 404 { "page", db_page_print_cmd, 0, NULL }, 405 { "buf", db_buf_print_cmd, 0, NULL }, 406 { "vnode", db_vnode_print_cmd, 0, NULL }, 407 { "pool", db_pool_print_cmd, 0, NULL }, 408 { NULL, NULL, 0, NULL, } 409 }; 410 411 struct db_command db_command_table[] = { 412 #ifdef DB_MACHINE_COMMANDS 413 /* this must be the first entry, if it exists */ 414 { "machine", NULL, 0, NULL}, 415 #endif 416 { "print", db_print_cmd, 0, NULL }, 417 { "examine", db_examine_cmd, CS_SET_DOT, NULL }, 418 { "x", db_examine_cmd, CS_SET_DOT, NULL }, 419 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, 420 { "set", db_set_cmd, CS_OWN, NULL }, 421 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 422 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 423 { "delete", db_delete_cmd, 0, NULL }, 424 { "d", db_delete_cmd, 0, NULL }, 425 { "break", db_breakpoint_cmd, 0, NULL }, 426 { "dwatch", db_deletewatch_cmd, 0, NULL }, 427 { "watch", db_watchpoint_cmd, CS_MORE, NULL }, 428 { "step", db_single_step_cmd, 0, NULL }, 429 { "s", db_single_step_cmd, 0, NULL }, 430 { "continue", db_continue_cmd, 0, NULL }, 431 { "c", db_continue_cmd, 0, NULL }, 432 { "until", db_trace_until_call_cmd,0, NULL }, 433 { "next", db_trace_until_matching_cmd,0, NULL }, 434 { "match", db_trace_until_matching_cmd,0, NULL }, 435 { "trace", db_stack_trace_cmd, 0, NULL }, 436 { "call", db_fncall, CS_OWN, NULL }, 437 { "ps", db_show_all_procs, 0, NULL }, 438 { "kill", db_kill_proc, CS_OWN, NULL }, 439 { "callout", db_show_callout, 0, NULL }, 440 { "reboot", db_reboot_cmd, CS_OWN, NULL }, 441 { "show", NULL, 0, db_show_cmds }, 442 { NULL, NULL, 0, NULL } 443 }; 444 445 #ifdef DB_MACHINE_COMMANDS 446 447 /* this function should be called to install the machine dependent 448 commands. It should be called before the debugger is enabled */ 449 void db_machine_commands_install(ptr) 450 struct db_command *ptr; 451 { 452 db_command_table[0].more = ptr; 453 return; 454 } 455 456 #endif 457 458 struct db_command *db_last_command = 0; 459 460 void 461 db_help_cmd() 462 { 463 struct db_command *cmd = db_command_table; 464 465 while (cmd->name != 0) { 466 db_printf("%-12s", cmd->name); 467 db_end_line(); 468 cmd++; 469 } 470 } 471 472 void 473 db_command_loop() 474 { 475 label_t db_jmpbuf; 476 label_t *savejmp; 477 extern int db_output_line; 478 479 /* 480 * Initialize 'prev' and 'next' to dot. 481 */ 482 db_prev = db_dot; 483 db_next = db_dot; 484 485 db_cmd_loop_done = 0; 486 487 savejmp = db_recover; 488 db_recover = &db_jmpbuf; 489 (void) setjmp(&db_jmpbuf); 490 491 while (!db_cmd_loop_done) { 492 if (db_print_position() != 0) 493 db_printf("\n"); 494 db_output_line = 0; 495 496 db_printf("db> "); 497 (void) db_read_line(); 498 499 db_command(&db_last_command, db_command_table); 500 } 501 502 db_recover = savejmp; 503 } 504 505 void 506 db_error(s) 507 char *s; 508 { 509 if (s) 510 db_printf(s); 511 db_flush_lex(); 512 longjmp(db_recover); 513 } 514 515 516 /* 517 * Call random function: 518 * !expr(arg,arg,arg) 519 */ 520 /*ARGSUSED*/ 521 void 522 db_fncall(addr, have_addr, count, modif) 523 db_expr_t addr; 524 int have_addr; 525 db_expr_t count; 526 char * modif; 527 { 528 db_expr_t fn_addr; 529 #define MAXARGS 11 530 db_expr_t args[MAXARGS]; 531 int nargs = 0; 532 db_expr_t retval; 533 db_expr_t (*func) __P((db_expr_t, ...)); 534 int t; 535 536 if (!db_expression(&fn_addr)) { 537 db_printf("Bad function\n"); 538 db_flush_lex(); 539 return; 540 } 541 func = (db_expr_t (*) __P((db_expr_t, ...))) fn_addr; 542 543 t = db_read_token(); 544 if (t == tLPAREN) { 545 if (db_expression(&args[0])) { 546 nargs++; 547 while ((t = db_read_token()) == tCOMMA) { 548 if (nargs == MAXARGS) { 549 db_printf("Too many arguments\n"); 550 db_flush_lex(); 551 return; 552 } 553 if (!db_expression(&args[nargs])) { 554 db_printf("Argument missing\n"); 555 db_flush_lex(); 556 return; 557 } 558 nargs++; 559 } 560 db_unread_token(t); 561 } 562 if (db_read_token() != tRPAREN) { 563 db_printf("?\n"); 564 db_flush_lex(); 565 return; 566 } 567 } 568 db_skip_to_eol(); 569 570 while (nargs < MAXARGS) { 571 args[nargs++] = 0; 572 } 573 574 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 575 args[5], args[6], args[7], args[8], args[9]); 576 db_printf("%#ln\n", retval); 577 } 578 579 void 580 db_reboot_cmd(addr, have_addr, count, modif) 581 db_expr_t addr; 582 int have_addr; 583 db_expr_t count; 584 char * modif; 585 { 586 db_expr_t bootflags; 587 588 /* Flags, default to RB_AUTOBOOT */ 589 if (!db_expression(&bootflags)) 590 bootflags = (db_expr_t)RB_AUTOBOOT; 591 if (db_read_token() != tEOL) { 592 db_error("?\n"); 593 /*NOTREACHED*/ 594 } 595 cpu_reboot((int)bootflags, NULL); 596 } 597
Indexes created Tue Sep 30 11:09:46 GMT 2025