db_command.c revision 1.28.2.2.2.1
1 /* $NetBSD: db_command.c,v 1.28.2.2.2.1 1999/06/07 04:25:29 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 40 #include <machine/db_machdep.h> /* type definitions */ 41 42 #include <ddb/db_lex.h> 43 #include <ddb/db_output.h> 44 #include <ddb/db_command.h> 45 #include <ddb/db_break.h> 46 #include <ddb/db_watch.h> 47 #include <ddb/db_run.h> 48 #include <ddb/db_variables.h> 49 #include <ddb/db_interface.h> 50 #include <ddb/db_sym.h> 51 #include <ddb/db_extern.h> 52 53 #include <vm/vm.h> 54 55 #include <uvm/uvm_extern.h> 56 #include <uvm/uvm_ddb.h> 57 58 /* 59 * Exported global variables 60 */ 61 boolean_t db_cmd_loop_done; 62 label_t *db_recover; 63 64 /* 65 * if 'ed' style: 'dot' is set at start of last item printed, 66 * and '+' points to next line. 67 * Otherwise: 'dot' points to next item, '..' points to last. 68 */ 69 boolean_t db_ed_style = TRUE; 70 71 /* 72 * Utility routine - discard tokens through end-of-line. 73 */ 74 void 75 db_skip_to_eol() 76 { 77 int t; 78 do { 79 t = db_read_token(); 80 } while (t != tEOL); 81 } 82 83 /* 84 * Results of command search. 85 */ 86 #define CMD_UNIQUE 0 87 #define CMD_FOUND 1 88 #define CMD_NONE 2 89 #define CMD_AMBIGUOUS 3 90 #define CMD_HELP 4 91 92 /* 93 * Search for command prefix. 94 */ 95 int 96 db_cmd_search(name, table, cmdp) 97 char *name; 98 struct db_command *table; 99 struct db_command **cmdp; /* out */ 100 { 101 struct db_command *cmd; 102 int result = CMD_NONE; 103 104 for (cmd = table; cmd->name != 0; cmd++) { 105 register char *lp; 106 register char *rp; 107 register int c; 108 109 lp = name; 110 rp = cmd->name; 111 while ((c = *lp) == *rp) { 112 if (c == 0) { 113 /* complete match */ 114 *cmdp = cmd; 115 return (CMD_UNIQUE); 116 } 117 lp++; 118 rp++; 119 } 120 if (c == 0) { 121 /* end of name, not end of command - 122 partial match */ 123 if (result == CMD_FOUND) { 124 result = CMD_AMBIGUOUS; 125 /* but keep looking for a full match - 126 this lets us match single letters */ 127 } 128 else { 129 *cmdp = cmd; 130 result = CMD_FOUND; 131 } 132 } 133 } 134 if (result == CMD_NONE) { 135 /* check for 'help' */ 136 if (name[0] == 'h' && name[1] == 'e' 137 && name[2] == 'l' && name[3] == 'p') 138 result = CMD_HELP; 139 } 140 return (result); 141 } 142 143 void 144 db_cmd_list(table) 145 struct db_command *table; 146 { 147 register struct db_command *cmd; 148 149 for (cmd = table; cmd->name != 0; cmd++) { 150 db_printf("%-12s", cmd->name); 151 db_end_line(); 152 } 153 } 154 155 void 156 db_command(last_cmdp, cmd_table) 157 struct db_command **last_cmdp; /* IN_OUT */ 158 struct db_command *cmd_table; 159 { 160 struct db_command *cmd; 161 int t; 162 char modif[TOK_STRING_SIZE]; 163 db_expr_t addr, count; 164 boolean_t have_addr = FALSE; 165 int result; 166 167 t = db_read_token(); 168 if (t == tEOL) { 169 /* empty line repeats last command, at 'next' */ 170 cmd = *last_cmdp; 171 addr = (db_expr_t)db_next; 172 have_addr = FALSE; 173 count = 1; 174 modif[0] = '\0'; 175 } 176 else if (t == tEXCL) { 177 db_fncall(0, 0, 0, NULL); 178 return; 179 } 180 else if (t != tIDENT) { 181 db_printf("?\n"); 182 db_flush_lex(); 183 return; 184 } 185 else { 186 /* 187 * Search for command 188 */ 189 while (cmd_table) { 190 result = db_cmd_search(db_tok_string, 191 cmd_table, 192 &cmd); 193 switch (result) { 194 case CMD_NONE: 195 db_printf("No such command\n"); 196 db_flush_lex(); 197 return; 198 case CMD_AMBIGUOUS: 199 db_printf("Ambiguous\n"); 200 db_flush_lex(); 201 return; 202 case CMD_HELP: 203 db_cmd_list(cmd_table); 204 db_flush_lex(); 205 return; 206 default: 207 break; 208 } 209 if ((cmd_table = cmd->more) != 0) { 210 t = db_read_token(); 211 if (t != tIDENT) { 212 db_cmd_list(cmd_table); 213 db_flush_lex(); 214 return; 215 } 216 } 217 } 218 219 if ((cmd->flag & CS_OWN) == 0) { 220 /* 221 * Standard syntax: 222 * command [/modifier] [addr] [,count] 223 */ 224 t = db_read_token(); 225 if (t == tSLASH) { 226 t = db_read_token(); 227 if (t != tIDENT) { 228 db_printf("Bad modifier\n"); 229 db_flush_lex(); 230 return; 231 } 232 db_strcpy(modif, db_tok_string); 233 } 234 else { 235 db_unread_token(t); 236 modif[0] = '\0'; 237 } 238 239 if (db_expression(&addr)) { 240 db_dot = (db_addr_t) addr; 241 db_last_addr = db_dot; 242 have_addr = TRUE; 243 } 244 else { 245 addr = (db_expr_t) db_dot; 246 have_addr = FALSE; 247 } 248 t = db_read_token(); 249 if (t == tCOMMA) { 250 if (!db_expression(&count)) { 251 db_printf("Count missing\n"); 252 db_flush_lex(); 253 return; 254 } 255 } 256 else { 257 db_unread_token(t); 258 count = -1; 259 } 260 if ((cmd->flag & CS_MORE) == 0) { 261 db_skip_to_eol(); 262 } 263 } 264 } 265 *last_cmdp = cmd; 266 if (cmd != 0) { 267 /* 268 * Execute the command. 269 */ 270 (*cmd->fcn)(addr, have_addr, count, modif); 271 272 if (cmd->flag & CS_SET_DOT) { 273 /* 274 * If command changes dot, set dot to 275 * previous address displayed (if 'ed' style). 276 */ 277 if (db_ed_style) { 278 db_dot = db_prev; 279 } 280 else { 281 db_dot = db_next; 282 } 283 } 284 else { 285 /* 286 * If command does not change dot, 287 * set 'next' location to be the same. 288 */ 289 db_next = db_dot; 290 } 291 } 292 } 293 294 /*ARGSUSED*/ 295 void 296 db_map_print_cmd(addr, have_addr, count, modif) 297 db_expr_t addr; 298 int have_addr; 299 db_expr_t count; 300 char * modif; 301 { 302 boolean_t full = FALSE; 303 304 if (modif[0] == 'f') 305 full = TRUE; 306 307 uvm_map_printit((vm_map_t) addr, full, db_printf); 308 } 309 310 /*ARGSUSED*/ 311 void 312 db_object_print_cmd(addr, have_addr, count, modif) 313 db_expr_t addr; 314 int have_addr; 315 db_expr_t count; 316 char * modif; 317 { 318 boolean_t full = FALSE; 319 320 if (modif[0] == 'f') 321 full = TRUE; 322 323 uvm_object_printit((struct uvm_object *) addr, full, db_printf); 324 } 325 326 /*ARGSUSED*/ 327 void 328 db_page_print_cmd(addr, have_addr, count, modif) 329 db_expr_t addr; 330 int have_addr; 331 db_expr_t count; 332 char * modif; 333 { 334 boolean_t full = FALSE; 335 336 if (modif[0] == 'f') 337 full = TRUE; 338 339 uvm_page_printit((struct vm_page *) addr, full, db_printf); 340 } 341 342 /*ARGSUSED*/ 343 void 344 db_buf_print_cmd(addr, have_addr, count, modif) 345 db_expr_t addr; 346 int have_addr; 347 db_expr_t count; 348 char * modif; 349 { 350 boolean_t full = FALSE; 351 352 if (modif[0] == 'f') 353 full = TRUE; 354 355 vfs_buf_print((struct buf *)addr, full, db_printf); 356 } 357 358 /*ARGSUSED*/ 359 void 360 db_vnode_print_cmd(addr, have_addr, count, modif) 361 db_expr_t addr; 362 int have_addr; 363 db_expr_t count; 364 char * modif; 365 { 366 boolean_t full = FALSE; 367 368 if (modif[0] == 'f') 369 full = TRUE; 370 371 vfs_vnode_print((struct vnode *) addr, full, db_printf); 372 } 373 374 /* 375 * 'show' commands 376 */ 377 378 struct db_command db_show_all_cmds[] = { 379 { "procs", db_show_all_procs, 0, NULL }, 380 { "callout", db_show_callout, 0, NULL }, 381 { NULL, NULL, 0, NULL } 382 }; 383 384 struct db_command db_show_cmds[] = { 385 { "all", NULL, 0, db_show_all_cmds }, 386 { "registers", db_show_regs, 0, NULL }, 387 { "breaks", db_listbreak_cmd, 0, NULL }, 388 { "watches", db_listwatch_cmd, 0, NULL }, 389 { "map", db_map_print_cmd, 0, NULL }, 390 { "object", db_object_print_cmd, 0, NULL }, 391 { "page", db_page_print_cmd, 0, NULL }, 392 { "buf", db_buf_print_cmd, 0, NULL }, 393 { "vnode", db_vnode_print_cmd, 0, NULL }, 394 { NULL, NULL, 0, NULL, } 395 }; 396 397 struct db_command db_command_table[] = { 398 #ifdef DB_MACHINE_COMMANDS 399 /* this must be the first entry, if it exists */ 400 { "machine", NULL, 0, NULL}, 401 #endif 402 { "print", db_print_cmd, 0, NULL }, 403 { "examine", db_examine_cmd, CS_SET_DOT, NULL }, 404 { "x", db_examine_cmd, CS_SET_DOT, NULL }, 405 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, 406 { "set", db_set_cmd, CS_OWN, NULL }, 407 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 408 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 409 { "delete", db_delete_cmd, 0, NULL }, 410 { "d", db_delete_cmd, 0, NULL }, 411 { "break", db_breakpoint_cmd, 0, NULL }, 412 { "dwatch", db_deletewatch_cmd, 0, NULL }, 413 { "watch", db_watchpoint_cmd, CS_MORE, NULL }, 414 { "step", db_single_step_cmd, 0, NULL }, 415 { "s", db_single_step_cmd, 0, NULL }, 416 { "continue", db_continue_cmd, 0, NULL }, 417 { "c", db_continue_cmd, 0, NULL }, 418 { "until", db_trace_until_call_cmd,0, NULL }, 419 { "next", db_trace_until_matching_cmd,0, NULL }, 420 { "match", db_trace_until_matching_cmd,0, NULL }, 421 { "trace", db_stack_trace_cmd, 0, NULL }, 422 { "call", db_fncall, CS_OWN, NULL }, 423 { "ps", db_show_all_procs, 0, NULL }, 424 { "kill", db_kill_proc, CS_OWN, NULL }, 425 { "callout", db_show_callout, 0, NULL }, 426 { "reboot", db_reboot_cmd, CS_OWN, NULL }, 427 { "show", NULL, 0, db_show_cmds }, 428 { NULL, NULL, 0, NULL } 429 }; 430 431 #ifdef DB_MACHINE_COMMANDS 432 433 /* this function should be called to install the machine dependent 434 commands. It should be called before the debugger is enabled */ 435 void db_machine_commands_install(ptr) 436 struct db_command *ptr; 437 { 438 db_command_table[0].more = ptr; 439 return; 440 } 441 442 #endif 443 444 struct db_command *db_last_command = 0; 445 446 void 447 db_help_cmd() 448 { 449 struct db_command *cmd = db_command_table; 450 451 while (cmd->name != 0) { 452 db_printf("%-12s", cmd->name); 453 db_end_line(); 454 cmd++; 455 } 456 } 457 458 void 459 db_command_loop() 460 { 461 label_t db_jmpbuf; 462 label_t *savejmp; 463 extern int db_output_line; 464 465 /* 466 * Initialize 'prev' and 'next' to dot. 467 */ 468 db_prev = db_dot; 469 db_next = db_dot; 470 471 db_cmd_loop_done = 0; 472 473 savejmp = db_recover; 474 db_recover = &db_jmpbuf; 475 (void) setjmp(&db_jmpbuf); 476 477 while (!db_cmd_loop_done) { 478 if (db_print_position() != 0) 479 db_printf("\n"); 480 db_output_line = 0; 481 482 db_printf("db> "); 483 (void) db_read_line(); 484 485 db_command(&db_last_command, db_command_table); 486 } 487 488 db_recover = savejmp; 489 } 490 491 void 492 db_error(s) 493 char *s; 494 { 495 if (s) 496 db_printf(s); 497 db_flush_lex(); 498 longjmp(db_recover); 499 } 500 501 502 /* 503 * Call random function: 504 * !expr(arg,arg,arg) 505 */ 506 /*ARGSUSED*/ 507 void 508 db_fncall(addr, have_addr, count, modif) 509 db_expr_t addr; 510 int have_addr; 511 db_expr_t count; 512 char * modif; 513 { 514 db_expr_t fn_addr; 515 #define MAXARGS 11 516 db_expr_t args[MAXARGS]; 517 int nargs = 0; 518 db_expr_t retval; 519 db_expr_t (*func) __P((db_expr_t, ...)); 520 int t; 521 522 if (!db_expression(&fn_addr)) { 523 db_printf("Bad function\n"); 524 db_flush_lex(); 525 return; 526 } 527 func = (db_expr_t (*) __P((db_expr_t, ...))) fn_addr; 528 529 t = db_read_token(); 530 if (t == tLPAREN) { 531 if (db_expression(&args[0])) { 532 nargs++; 533 while ((t = db_read_token()) == tCOMMA) { 534 if (nargs == MAXARGS) { 535 db_printf("Too many arguments\n"); 536 db_flush_lex(); 537 return; 538 } 539 if (!db_expression(&args[nargs])) { 540 db_printf("Argument missing\n"); 541 db_flush_lex(); 542 return; 543 } 544 nargs++; 545 } 546 db_unread_token(t); 547 } 548 if (db_read_token() != tRPAREN) { 549 db_printf("?\n"); 550 db_flush_lex(); 551 return; 552 } 553 } 554 db_skip_to_eol(); 555 556 while (nargs < MAXARGS) { 557 args[nargs++] = 0; 558 } 559 560 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 561 args[5], args[6], args[7], args[8], args[9]); 562 db_printf("%#ln\n", retval); 563 } 564 565 void 566 db_reboot_cmd(addr, have_addr, count, modif) 567 db_expr_t addr; 568 int have_addr; 569 db_expr_t count; 570 char * modif; 571 { 572 db_expr_t bootflags; 573 574 /* Flags, default to RB_AUTOBOOT */ 575 if (!db_expression(&bootflags)) 576 bootflags = (db_expr_t)RB_AUTOBOOT; 577 if (db_read_token() != tEOL) { 578 db_error("?\n"); 579 /*NOTREACHED*/ 580 } 581 cpu_reboot((int)bootflags, NULL); 582 } 583
Indexes created Tue Sep 30 11:09:46 GMT 2025