db_command.c revision 1.27.4.1
1 /* $NetBSD: db_command.c,v 1.27.4.1 1998/11/09 06:06:31 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 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 #include "opt_uvm.h" 31 32 /* 33 * Command dispatcher. 34 */ 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/reboot.h> 38 #include <sys/proc.h> 39 #include <sys/vnode.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 #if defined(UVM) 57 #include <uvm/uvm_extern.h> 58 #include <uvm/uvm_ddb.h> 59 #endif 60 61 /* 62 * Exported global variables 63 */ 64 boolean_t db_cmd_loop_done; 65 label_t *db_recover; 66 67 /* 68 * if 'ed' style: 'dot' is set at start of last item printed, 69 * and '+' points to next line. 70 * Otherwise: 'dot' points to next item, '..' points to last. 71 */ 72 boolean_t db_ed_style = TRUE; 73 74 /* 75 * Utility routine - discard tokens through end-of-line. 76 */ 77 void 78 db_skip_to_eol() 79 { 80 int t; 81 do { 82 t = db_read_token(); 83 } while (t != tEOL); 84 } 85 86 /* 87 * Results of command search. 88 */ 89 #define CMD_UNIQUE 0 90 #define CMD_FOUND 1 91 #define CMD_NONE 2 92 #define CMD_AMBIGUOUS 3 93 #define CMD_HELP 4 94 95 /* 96 * Search for command prefix. 97 */ 98 int 99 db_cmd_search(name, table, cmdp) 100 char *name; 101 struct db_command *table; 102 struct db_command **cmdp; /* out */ 103 { 104 struct db_command *cmd; 105 int result = CMD_NONE; 106 107 for (cmd = table; cmd->name != 0; cmd++) { 108 register char *lp; 109 register char *rp; 110 register int c; 111 112 lp = name; 113 rp = cmd->name; 114 while ((c = *lp) == *rp) { 115 if (c == 0) { 116 /* complete match */ 117 *cmdp = cmd; 118 return (CMD_UNIQUE); 119 } 120 lp++; 121 rp++; 122 } 123 if (c == 0) { 124 /* end of name, not end of command - 125 partial match */ 126 if (result == CMD_FOUND) { 127 result = CMD_AMBIGUOUS; 128 /* but keep looking for a full match - 129 this lets us match single letters */ 130 } 131 else { 132 *cmdp = cmd; 133 result = CMD_FOUND; 134 } 135 } 136 } 137 if (result == CMD_NONE) { 138 /* check for 'help' */ 139 if (name[0] == 'h' && name[1] == 'e' 140 && name[2] == 'l' && name[3] == 'p') 141 result = CMD_HELP; 142 } 143 return (result); 144 } 145 146 void 147 db_cmd_list(table) 148 struct db_command *table; 149 { 150 register struct db_command *cmd; 151 152 for (cmd = table; cmd->name != 0; cmd++) { 153 db_printf("%-12s", cmd->name); 154 db_end_line(); 155 } 156 } 157 158 void 159 db_command(last_cmdp, cmd_table) 160 struct db_command **last_cmdp; /* IN_OUT */ 161 struct db_command *cmd_table; 162 { 163 struct db_command *cmd; 164 int t; 165 char modif[TOK_STRING_SIZE]; 166 db_expr_t addr, count; 167 boolean_t have_addr = FALSE; 168 int result; 169 170 t = db_read_token(); 171 if (t == tEOL) { 172 /* empty line repeats last command, at 'next' */ 173 cmd = *last_cmdp; 174 addr = (db_expr_t)db_next; 175 have_addr = FALSE; 176 count = 1; 177 modif[0] = '\0'; 178 } 179 else if (t == tEXCL) { 180 db_fncall(0, 0, 0, NULL); 181 return; 182 } 183 else if (t != tIDENT) { 184 db_printf("?\n"); 185 db_flush_lex(); 186 return; 187 } 188 else { 189 /* 190 * Search for command 191 */ 192 while (cmd_table) { 193 result = db_cmd_search(db_tok_string, 194 cmd_table, 195 &cmd); 196 switch (result) { 197 case CMD_NONE: 198 db_printf("No such command\n"); 199 db_flush_lex(); 200 return; 201 case CMD_AMBIGUOUS: 202 db_printf("Ambiguous\n"); 203 db_flush_lex(); 204 return; 205 case CMD_HELP: 206 db_cmd_list(cmd_table); 207 db_flush_lex(); 208 return; 209 default: 210 break; 211 } 212 if ((cmd_table = cmd->more) != 0) { 213 t = db_read_token(); 214 if (t != tIDENT) { 215 db_cmd_list(cmd_table); 216 db_flush_lex(); 217 return; 218 } 219 } 220 } 221 222 if ((cmd->flag & CS_OWN) == 0) { 223 /* 224 * Standard syntax: 225 * command [/modifier] [addr] [,count] 226 */ 227 t = db_read_token(); 228 if (t == tSLASH) { 229 t = db_read_token(); 230 if (t != tIDENT) { 231 db_printf("Bad modifier\n"); 232 db_flush_lex(); 233 return; 234 } 235 db_strcpy(modif, db_tok_string); 236 } 237 else { 238 db_unread_token(t); 239 modif[0] = '\0'; 240 } 241 242 if (db_expression(&addr)) { 243 db_dot = (db_addr_t) addr; 244 db_last_addr = db_dot; 245 have_addr = TRUE; 246 } 247 else { 248 addr = (db_expr_t) db_dot; 249 have_addr = FALSE; 250 } 251 t = db_read_token(); 252 if (t == tCOMMA) { 253 if (!db_expression(&count)) { 254 db_printf("Count missing\n"); 255 db_flush_lex(); 256 return; 257 } 258 } 259 else { 260 db_unread_token(t); 261 count = -1; 262 } 263 if ((cmd->flag & CS_MORE) == 0) { 264 db_skip_to_eol(); 265 } 266 } 267 } 268 *last_cmdp = cmd; 269 if (cmd != 0) { 270 /* 271 * Execute the command. 272 */ 273 (*cmd->fcn)(addr, have_addr, count, modif); 274 275 if (cmd->flag & CS_SET_DOT) { 276 /* 277 * If command changes dot, set dot to 278 * previous address displayed (if 'ed' style). 279 */ 280 if (db_ed_style) { 281 db_dot = db_prev; 282 } 283 else { 284 db_dot = db_next; 285 } 286 } 287 else { 288 /* 289 * If command does not change dot, 290 * set 'next' location to be the same. 291 */ 292 db_next = db_dot; 293 } 294 } 295 } 296 297 /*ARGSUSED*/ 298 void 299 db_map_print_cmd(addr, have_addr, count, modif) 300 db_expr_t addr; 301 int have_addr; 302 db_expr_t count; 303 char * modif; 304 { 305 boolean_t full = FALSE; 306 307 if (modif[0] == 'f') 308 full = TRUE; 309 310 #if defined(UVM) 311 uvm_map_printit((vm_map_t) addr, full, db_printf); 312 #else 313 _vm_map_print((vm_map_t) addr, full, db_printf); 314 #endif 315 } 316 317 /*ARGSUSED*/ 318 void 319 db_object_print_cmd(addr, have_addr, count, modif) 320 db_expr_t addr; 321 int have_addr; 322 db_expr_t count; 323 char * modif; 324 { 325 boolean_t full = FALSE; 326 327 if (modif[0] == 'f') 328 full = TRUE; 329 330 #if defined(UVM) 331 uvm_object_printit((struct uvm_object *) addr, full, db_printf); 332 #else 333 _vm_object_print((vm_object_t) addr, full, db_printf); 334 #endif 335 } 336 337 /*ARGSUSED*/ 338 void 339 db_page_print_cmd(addr, have_addr, count, modif) 340 db_expr_t addr; 341 int have_addr; 342 db_expr_t count; 343 char * modif; 344 { 345 boolean_t full = FALSE; 346 347 if (modif[0] == 'f') 348 full = TRUE; 349 350 #if defined(UVM) 351 uvm_page_printit((struct vm_page *) addr, full, db_printf); 352 #else 353 printf("only supported by UVM\n"); 354 #endif 355 } 356 357 /*ARGSUSED*/ 358 void 359 db_buf_print_cmd(addr, have_addr, count, modif) 360 db_expr_t addr; 361 int have_addr; 362 db_expr_t count; 363 char * modif; 364 { 365 boolean_t full = FALSE; 366 367 if (modif[0] == 'f') 368 full = TRUE; 369 370 vfs_buf_print((struct buf *)addr, full, db_printf); 371 } 372 373 /*ARGSUSED*/ 374 void 375 db_vnode_print_cmd(addr, have_addr, count, modif) 376 db_expr_t addr; 377 int have_addr; 378 db_expr_t count; 379 char * modif; 380 { 381 boolean_t full = FALSE; 382 383 if (modif[0] == 'f') 384 full = TRUE; 385 386 vfs_vnode_print((struct vnode *) addr, full, db_printf); 387 } 388 389 /* 390 * 'show' commands 391 */ 392 393 struct db_command db_show_all_cmds[] = { 394 { "procs", db_show_all_procs, 0, NULL }, 395 { "callout", db_show_callout, 0, NULL }, 396 { NULL, NULL, 0, NULL } 397 }; 398 399 struct db_command db_show_cmds[] = { 400 { "all", NULL, 0, db_show_all_cmds }, 401 { "registers", db_show_regs, 0, NULL }, 402 { "breaks", db_listbreak_cmd, 0, NULL }, 403 { "watches", db_listwatch_cmd, 0, NULL }, 404 { "map", db_map_print_cmd, 0, NULL }, 405 { "object", db_object_print_cmd, 0, NULL }, 406 { "page", db_page_print_cmd, 0, NULL }, 407 { "buf", db_buf_print_cmd, 0, NULL }, 408 { "vnode", db_vnode_print_cmd, 0, NULL }, 409 { NULL, NULL, 0, NULL, } 410 }; 411 412 struct db_command db_command_table[] = { 413 #ifdef DB_MACHINE_COMMANDS 414 /* this must be the first entry, if it exists */ 415 { "machine", NULL, 0, NULL}, 416 #endif 417 { "print", db_print_cmd, 0, NULL }, 418 { "examine", db_examine_cmd, CS_SET_DOT, NULL }, 419 { "x", db_examine_cmd, CS_SET_DOT, NULL }, 420 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, NULL }, 421 { "set", db_set_cmd, CS_OWN, NULL }, 422 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 423 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, NULL }, 424 { "delete", db_delete_cmd, 0, NULL }, 425 { "d", db_delete_cmd, 0, NULL }, 426 { "break", db_breakpoint_cmd, 0, NULL }, 427 { "dwatch", db_deletewatch_cmd, 0, NULL }, 428 { "watch", db_watchpoint_cmd, CS_MORE, NULL }, 429 { "step", db_single_step_cmd, 0, NULL }, 430 { "s", db_single_step_cmd, 0, NULL }, 431 { "continue", db_continue_cmd, 0, NULL }, 432 { "c", db_continue_cmd, 0, NULL }, 433 { "until", db_trace_until_call_cmd,0, NULL }, 434 { "next", db_trace_until_matching_cmd,0, NULL }, 435 { "match", db_trace_until_matching_cmd,0, NULL }, 436 { "trace", db_stack_trace_cmd, 0, NULL }, 437 { "call", db_fncall, CS_OWN, NULL }, 438 { "ps", db_show_all_procs, 0, NULL }, 439 { "kill", db_kill_proc, CS_OWN, NULL }, 440 { "callout", db_show_callout, 0, NULL }, 441 { "reboot", db_reboot_cmd, CS_OWN, NULL }, 442 { "show", NULL, 0, db_show_cmds }, 443 { NULL, NULL, 0, NULL } 444 }; 445 446 #ifdef DB_MACHINE_COMMANDS 447 448 /* this function should be called to install the machine dependent 449 commands. It should be called before the debugger is enabled */ 450 void db_machine_commands_install(ptr) 451 struct db_command *ptr; 452 { 453 db_command_table[0].more = ptr; 454 return; 455 } 456 457 #endif 458 459 struct db_command *db_last_command = 0; 460 461 void 462 db_help_cmd() 463 { 464 struct db_command *cmd = db_command_table; 465 466 while (cmd->name != 0) { 467 db_printf("%-12s", cmd->name); 468 db_end_line(); 469 cmd++; 470 } 471 } 472 473 void 474 db_command_loop() 475 { 476 label_t db_jmpbuf; 477 label_t *savejmp; 478 extern int db_output_line; 479 480 /* 481 * Initialize 'prev' and 'next' to dot. 482 */ 483 db_prev = db_dot; 484 db_next = db_dot; 485 486 db_cmd_loop_done = 0; 487 488 savejmp = db_recover; 489 db_recover = &db_jmpbuf; 490 (void) setjmp(&db_jmpbuf); 491 492 while (!db_cmd_loop_done) { 493 if (db_print_position() != 0) 494 db_printf("\n"); 495 db_output_line = 0; 496 497 db_printf("db> "); 498 (void) db_read_line(); 499 500 db_command(&db_last_command, db_command_table); 501 } 502 503 db_recover = savejmp; 504 } 505 506 void 507 db_error(s) 508 char *s; 509 { 510 if (s) 511 db_printf(s); 512 db_flush_lex(); 513 longjmp(db_recover); 514 } 515 516 517 /* 518 * Call random function: 519 * !expr(arg,arg,arg) 520 */ 521 /*ARGSUSED*/ 522 void 523 db_fncall(addr, have_addr, count, modif) 524 db_expr_t addr; 525 int have_addr; 526 db_expr_t count; 527 char * modif; 528 { 529 db_expr_t fn_addr; 530 #define MAXARGS 11 531 db_expr_t args[MAXARGS]; 532 int nargs = 0; 533 db_expr_t retval; 534 db_expr_t (*func) __P((db_expr_t, ...)); 535 int t; 536 537 if (!db_expression(&fn_addr)) { 538 db_printf("Bad function\n"); 539 db_flush_lex(); 540 return; 541 } 542 func = (db_expr_t (*) __P((db_expr_t, ...))) fn_addr; 543 544 t = db_read_token(); 545 if (t == tLPAREN) { 546 if (db_expression(&args[0])) { 547 nargs++; 548 while ((t = db_read_token()) == tCOMMA) { 549 if (nargs == MAXARGS) { 550 db_printf("Too many arguments\n"); 551 db_flush_lex(); 552 return; 553 } 554 if (!db_expression(&args[nargs])) { 555 db_printf("Argument missing\n"); 556 db_flush_lex(); 557 return; 558 } 559 nargs++; 560 } 561 db_unread_token(t); 562 } 563 if (db_read_token() != tRPAREN) { 564 db_printf("?\n"); 565 db_flush_lex(); 566 return; 567 } 568 } 569 db_skip_to_eol(); 570 571 while (nargs < MAXARGS) { 572 args[nargs++] = 0; 573 } 574 575 retval = (*func)(args[0], args[1], args[2], args[3], args[4], 576 args[5], args[6], args[7], args[8], args[9]); 577 db_printf("%#ln\n", retval); 578 } 579 580 void 581 db_reboot_cmd(addr, have_addr, count, modif) 582 db_expr_t addr; 583 int have_addr; 584 db_expr_t count; 585 char * modif; 586 { 587 db_expr_t bootflags; 588 589 /* Flags, default to RB_AUTOBOOT */ 590 if (!db_expression(&bootflags)) 591 bootflags = (db_expr_t)RB_AUTOBOOT; 592 if (db_read_token() != tEOL) { 593 db_error("?\n"); 594 /*NOTREACHED*/ 595 } 596 cpu_reboot((int)bootflags, NULL); 597 } 598
Indexes created Tue Sep 30 11:09:46 GMT 2025