| 1 | /* Top level `main' program for GDB, the GNU debugger. |
| 2 | Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 20 | |
| 21 | #include "defs.h" |
| 22 | #include "gdbcmd.h" |
| 23 | #include "call-cmds.h" |
| 24 | #include "symtab.h" |
| 25 | #include "inferior.h" |
| 26 | #include "signals.h" |
| 27 | #include "target.h" |
| 28 | #include "breakpoint.h" |
| 29 | #include "gdbtypes.h" |
| 30 | #include "expression.h" |
| 31 | #include "language.h" |
| 32 | #include "serial.h" /* For job_control. */ |
| 33 | |
| 34 | #include "getopt.h" |
| 35 | |
| 36 | /* readline include files */ |
| 37 | #include "readline.h" |
| 38 | #include "history.h" |
| 39 | |
| 40 | /* readline defines this. */ |
| 41 | #undef savestring |
| 42 | |
| 43 | #ifdef USG |
| 44 | #include <sys/types.h> |
| 45 | #include <unistd.h> |
| 46 | #endif |
| 47 | |
| 48 | #include <string.h> |
| 49 | #ifndef NO_SYS_FILE |
| 50 | #include <sys/file.h> |
| 51 | #endif |
| 52 | #include <setjmp.h> |
| 53 | #include <sys/param.h> |
| 54 | #include <sys/stat.h> |
| 55 | #include <ctype.h> |
| 56 | |
| 57 | #ifdef SET_STACK_LIMIT_HUGE |
| 58 | #include <sys/time.h> |
| 59 | #include <sys/resource.h> |
| 60 | |
| 61 | int original_stack_limit; |
| 62 | #endif |
| 63 | |
| 64 | /* Prototypes for local functions */ |
| 65 | |
| 66 | static char * |
| 67 | symbol_completion_function PARAMS ((char *, int)); |
| 68 | |
| 69 | static void |
| 70 | command_loop PARAMS ((void)); |
| 71 | |
| 72 | static void |
| 73 | command_loop_marker PARAMS ((int)); |
| 74 | |
| 75 | static void |
| 76 | print_gdb_version PARAMS ((FILE *)); |
| 77 | |
| 78 | static void |
| 79 | quit_command PARAMS ((char *, int)); |
| 80 | |
| 81 | static void |
| 82 | init_main PARAMS ((void)); |
| 83 | |
| 84 | static void |
| 85 | init_history PARAMS ((void)); |
| 86 | |
| 87 | static void |
| 88 | init_cmd_lists PARAMS ((void)); |
| 89 | |
| 90 | static void |
| 91 | float_handler PARAMS ((int)); |
| 92 | |
| 93 | static void |
| 94 | source_command PARAMS ((char *, int)); |
| 95 | |
| 96 | static void cd_command PARAMS ((char *, int)); |
| 97 | |
| 98 | static void |
| 99 | print_gnu_advertisement PARAMS ((void)); |
| 100 | |
| 101 | static void |
| 102 | init_signals PARAMS ((void)); |
| 103 | |
| 104 | static void |
| 105 | read_command_file PARAMS ((FILE *)); |
| 106 | |
| 107 | static void |
| 108 | set_verbose PARAMS ((char *, int, struct cmd_list_element *)); |
| 109 | |
| 110 | static void |
| 111 | show_history PARAMS ((char *, int)); |
| 112 | |
| 113 | static void |
| 114 | set_history PARAMS ((char *, int)); |
| 115 | |
| 116 | static void |
| 117 | set_history_size_command PARAMS ((char *, int, struct cmd_list_element *)); |
| 118 | |
| 119 | static void |
| 120 | show_commands PARAMS ((char *, int)); |
| 121 | |
| 122 | static void |
| 123 | echo_command PARAMS ((char *, int)); |
| 124 | |
| 125 | static void |
| 126 | pwd_command PARAMS ((char *, int)); |
| 127 | |
| 128 | static void |
| 129 | show_version PARAMS ((char *, int)); |
| 130 | |
| 131 | static void |
| 132 | document_command PARAMS ((char *, int)); |
| 133 | |
| 134 | static void |
| 135 | define_command PARAMS ((char *, int)); |
| 136 | |
| 137 | static void |
| 138 | validate_comname PARAMS ((char *)); |
| 139 | |
| 140 | static void |
| 141 | help_command PARAMS ((char *, int)); |
| 142 | |
| 143 | static void |
| 144 | show_command PARAMS ((char *, int)); |
| 145 | |
| 146 | static void |
| 147 | info_command PARAMS ((char *, int)); |
| 148 | |
| 149 | static void |
| 150 | do_nothing PARAMS ((int)); |
| 151 | |
| 152 | static int |
| 153 | quit_cover PARAMS ((char *)); |
| 154 | |
| 155 | static void |
| 156 | disconnect PARAMS ((int)); |
| 157 | |
| 158 | static void |
| 159 | source_cleanup PARAMS ((FILE *)); |
| 160 | |
| 161 | /* If this definition isn't overridden by the header files, assume |
| 162 | that isatty and fileno exist on this system. */ |
| 163 | #ifndef ISATTY |
| 164 | #define ISATTY(FP) (isatty (fileno (FP))) |
| 165 | #endif |
| 166 | |
| 167 | /* Initialization file name for gdb. This is overridden in some configs. */ |
| 168 | |
| 169 | #ifndef GDBINIT_FILENAME |
| 170 | #define GDBINIT_FILENAME ".gdbinit" |
| 171 | #endif |
| 172 | static char gdbinit[] = GDBINIT_FILENAME; |
| 173 | static int inhibit_gdbinit = 0; |
| 174 | |
| 175 | #define ALL_CLEANUPS ((struct cleanup *)0) |
| 176 | |
| 177 | /* Version number of GDB, as a string. */ |
| 178 | |
| 179 | extern char *version; |
| 180 | |
| 181 | /* Canonical host name as a string. */ |
| 182 | |
| 183 | extern char *host_canonical; |
| 184 | |
| 185 | /* Canonical target name as a string. */ |
| 186 | |
| 187 | extern char *target_canonical; |
| 188 | |
| 189 | /* Message to be printed before the error message, when an error occurs. */ |
| 190 | |
| 191 | extern char *error_pre_print; |
| 192 | |
| 193 | /* Message to be printed before the warning message, when a warning occurs. */ |
| 194 | |
| 195 | extern char *warning_pre_print; |
| 196 | |
| 197 | extern char lang_frame_mismatch_warn[]; /* language.c */ |
| 198 | |
| 199 | /* Flag for whether we want all the "from_tty" gubbish printed. */ |
| 200 | |
| 201 | int caution = 1; /* Default is yes, sigh. */ |
| 202 | |
| 203 | /* |
| 204 | * Define all cmd_list_element's |
| 205 | */ |
| 206 | |
| 207 | /* Chain containing all defined commands. */ |
| 208 | |
| 209 | struct cmd_list_element *cmdlist; |
| 210 | |
| 211 | /* Chain containing all defined info subcommands. */ |
| 212 | |
| 213 | struct cmd_list_element *infolist; |
| 214 | |
| 215 | /* Chain containing all defined enable subcommands. */ |
| 216 | |
| 217 | struct cmd_list_element *enablelist; |
| 218 | |
| 219 | /* Chain containing all defined disable subcommands. */ |
| 220 | |
| 221 | struct cmd_list_element *disablelist; |
| 222 | |
| 223 | /* Chain containing all defined delete subcommands. */ |
| 224 | |
| 225 | struct cmd_list_element *deletelist; |
| 226 | |
| 227 | /* Chain containing all defined "enable breakpoint" subcommands. */ |
| 228 | |
| 229 | struct cmd_list_element *enablebreaklist; |
| 230 | |
| 231 | /* Chain containing all defined set subcommands */ |
| 232 | |
| 233 | struct cmd_list_element *setlist; |
| 234 | |
| 235 | /* Chain containing all defined unset subcommands */ |
| 236 | |
| 237 | struct cmd_list_element *unsetlist; |
| 238 | |
| 239 | /* Chain containing all defined show subcommands. */ |
| 240 | |
| 241 | struct cmd_list_element *showlist; |
| 242 | |
| 243 | /* Chain containing all defined \"set history\". */ |
| 244 | |
| 245 | struct cmd_list_element *sethistlist; |
| 246 | |
| 247 | /* Chain containing all defined \"show history\". */ |
| 248 | |
| 249 | struct cmd_list_element *showhistlist; |
| 250 | |
| 251 | /* Chain containing all defined \"unset history\". */ |
| 252 | |
| 253 | struct cmd_list_element *unsethistlist; |
| 254 | |
| 255 | /* Chain containing all defined maintenance subcommands. */ |
| 256 | |
| 257 | #if MAINTENANCE_CMDS |
| 258 | struct cmd_list_element *maintenancelist; |
| 259 | #endif |
| 260 | |
| 261 | /* Chain containing all defined "maintenance info" subcommands. */ |
| 262 | |
| 263 | #if MAINTENANCE_CMDS |
| 264 | struct cmd_list_element *maintenanceinfolist; |
| 265 | #endif |
| 266 | |
| 267 | /* Chain containing all defined "maintenance print" subcommands. */ |
| 268 | |
| 269 | #if MAINTENANCE_CMDS |
| 270 | struct cmd_list_element *maintenanceprintlist; |
| 271 | #endif |
| 272 | |
| 273 | struct cmd_list_element *setprintlist; |
| 274 | |
| 275 | struct cmd_list_element *showprintlist; |
| 276 | |
| 277 | struct cmd_list_element *setchecklist; |
| 278 | |
| 279 | struct cmd_list_element *showchecklist; |
| 280 | |
| 281 | /* stdio stream that command input is being read from. */ |
| 282 | |
| 283 | FILE *instream; |
| 284 | |
| 285 | /* Current working directory. */ |
| 286 | |
| 287 | char *current_directory; |
| 288 | |
| 289 | /* The directory name is actually stored here (usually). */ |
| 290 | static char dirbuf[1024]; |
| 291 | |
| 292 | /* Function to call before reading a command, if nonzero. |
| 293 | The function receives two args: an input stream, |
| 294 | and a prompt string. */ |
| 295 | |
| 296 | void (*window_hook) PARAMS ((FILE *, char *)); |
| 297 | |
| 298 | extern int mapped_symbol_files; |
| 299 | extern int readnow_symbol_files; |
| 300 | |
| 301 | int epoch_interface; |
| 302 | int xgdb_verbose; |
| 303 | |
| 304 | /* gdb prints this when reading a command interactively */ |
| 305 | static char *prompt; |
| 306 | |
| 307 | /* Buffer used for reading command lines, and the size |
| 308 | allocated for it so far. */ |
| 309 | |
| 310 | char *line; |
| 311 | int linesize = 100; |
| 312 | |
| 313 | /* Baud rate specified for talking to serial target systems. Default |
| 314 | is left as a zero pointer, so targets can choose their own defaults. */ |
| 315 | |
| 316 | char *baud_rate; |
| 317 | |
| 318 | /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */ |
| 319 | |
| 320 | #ifndef STOP_SIGNAL |
| 321 | #ifdef SIGTSTP |
| 322 | #define STOP_SIGNAL SIGTSTP |
| 323 | static void stop_sig PARAMS ((int)); |
| 324 | #endif |
| 325 | #endif |
| 326 | |
| 327 | /* Some System V have job control but not sigsetmask(). */ |
| 328 | #if !defined (HAVE_SIGSETMASK) |
| 329 | #define HAVE_SIGSETMASK !defined (USG) |
| 330 | #endif |
| 331 | |
| 332 | #if 0 == (HAVE_SIGSETMASK) |
| 333 | #define sigsetmask(n) |
| 334 | #endif |
| 335 | \f |
| 336 | /* Where to go for return_to_top_level (RETURN_ERROR). */ |
| 337 | static jmp_buf error_return; |
| 338 | /* Where to go for return_to_top_level (RETURN_QUIT). */ |
| 339 | static jmp_buf quit_return; |
| 340 | |
| 341 | /* Temporary variable for SET_TOP_LEVEL. */ |
| 342 | static int top_level_val; |
| 343 | |
| 344 | /* Do a setjmp on error_return and quit_return. catch_errors is |
| 345 | generally a cleaner way to do this, but main() would look pretty |
| 346 | ugly if it had to use catch_errors each time. */ |
| 347 | |
| 348 | #define SET_TOP_LEVEL() \ |
| 349 | (((top_level_val = setjmp (error_return)) \ |
| 350 | ? (PTR) 0 : (PTR) memcpy (quit_return, error_return, sizeof (jmp_buf))) \ |
| 351 | , top_level_val) |
| 352 | |
| 353 | /* Return for reason REASON. This generally gets back to the command |
| 354 | loop, but can be caught via catch_errors. */ |
| 355 | |
| 356 | NORETURN void |
| 357 | return_to_top_level (reason) |
| 358 | enum return_reason reason; |
| 359 | { |
| 360 | quit_flag = 0; |
| 361 | immediate_quit = 0; |
| 362 | |
| 363 | /* Perhaps it would be cleaner to do this via the cleanup chain (not sure |
| 364 | I can think of a reason why that is vital, though). */ |
| 365 | bpstat_clear_actions(stop_bpstat); /* Clear queued breakpoint commands */ |
| 366 | |
| 367 | disable_current_display (); |
| 368 | do_cleanups (ALL_CLEANUPS); |
| 369 | (NORETURN void) longjmp |
| 370 | (reason == RETURN_ERROR ? error_return : quit_return, 1); |
| 371 | } |
| 372 | |
| 373 | /* Call FUNC with arg ARGS, catching any errors. If there is no |
| 374 | error, return the value returned by FUNC. If there is an error, |
| 375 | print ERRSTRING, print the specific error message, then return |
| 376 | zero. |
| 377 | |
| 378 | MASK specifies what to catch; it is normally set to |
| 379 | RETURN_MASK_ALL, if for no other reason than that the code which |
| 380 | calls catch_errors might not be set up to deal with a quit which |
| 381 | isn't caught. But if the code can deal with it, it generally |
| 382 | should be RETURN_MASK_ERROR, unless for some reason it is more |
| 383 | useful to abort only the portion of the operation inside the |
| 384 | catch_errors. Note that quit should return to the command line |
| 385 | fairly quickly, even if some further processing is being done. */ |
| 386 | |
| 387 | int |
| 388 | catch_errors (func, args, errstring, mask) |
| 389 | int (*func) PARAMS ((char *)); |
| 390 | PTR args; |
| 391 | char *errstring; |
| 392 | return_mask mask; |
| 393 | { |
| 394 | jmp_buf saved_error; |
| 395 | jmp_buf saved_quit; |
| 396 | jmp_buf tmp_jmp; |
| 397 | int val; |
| 398 | struct cleanup *saved_cleanup_chain; |
| 399 | char *saved_error_pre_print; |
| 400 | |
| 401 | saved_cleanup_chain = save_cleanups (); |
| 402 | saved_error_pre_print = error_pre_print; |
| 403 | |
| 404 | if (mask & RETURN_MASK_ERROR) |
| 405 | memcpy ((char *)saved_error, (char *)error_return, sizeof (jmp_buf)); |
| 406 | if (mask & RETURN_MASK_QUIT) |
| 407 | memcpy (saved_quit, quit_return, sizeof (jmp_buf)); |
| 408 | error_pre_print = errstring; |
| 409 | |
| 410 | if (setjmp (tmp_jmp) == 0) |
| 411 | { |
| 412 | if (mask & RETURN_MASK_ERROR) |
| 413 | memcpy (error_return, tmp_jmp, sizeof (jmp_buf)); |
| 414 | if (mask & RETURN_MASK_QUIT) |
| 415 | memcpy (quit_return, tmp_jmp, sizeof (jmp_buf)); |
| 416 | val = (*func) (args); |
| 417 | } |
| 418 | else |
| 419 | val = 0; |
| 420 | |
| 421 | restore_cleanups (saved_cleanup_chain); |
| 422 | |
| 423 | error_pre_print = saved_error_pre_print; |
| 424 | if (mask & RETURN_MASK_ERROR) |
| 425 | memcpy (error_return, saved_error, sizeof (jmp_buf)); |
| 426 | if (mask & RETURN_MASK_QUIT) |
| 427 | memcpy (quit_return, saved_quit, sizeof (jmp_buf)); |
| 428 | return val; |
| 429 | } |
| 430 | |
| 431 | /* Handler for SIGHUP. */ |
| 432 | |
| 433 | static void |
| 434 | disconnect (signo) |
| 435 | int signo; |
| 436 | { |
| 437 | catch_errors (quit_cover, NULL, |
| 438 | "Could not kill the program being debugged", RETURN_MASK_ALL); |
| 439 | signal (SIGHUP, SIG_DFL); |
| 440 | kill (getpid (), SIGHUP); |
| 441 | } |
| 442 | |
| 443 | /* Just a little helper function for disconnect(). */ |
| 444 | |
| 445 | static int |
| 446 | quit_cover (s) |
| 447 | char *s; |
| 448 | { |
| 449 | caution = 0; /* Throw caution to the wind -- we're exiting. |
| 450 | This prevents asking the user dumb questions. */ |
| 451 | quit_command((char *)0, 0); |
| 452 | return 0; |
| 453 | } |
| 454 | \f |
| 455 | /* Clean up on error during a "source" command (or execution of a |
| 456 | user-defined command). */ |
| 457 | |
| 458 | static void |
| 459 | source_cleanup (stream) |
| 460 | FILE *stream; |
| 461 | { |
| 462 | /* Restore the previous input stream. */ |
| 463 | instream = stream; |
| 464 | } |
| 465 | |
| 466 | /* Read commands from STREAM. */ |
| 467 | static void |
| 468 | read_command_file (stream) |
| 469 | FILE *stream; |
| 470 | { |
| 471 | struct cleanup *cleanups; |
| 472 | |
| 473 | cleanups = make_cleanup (source_cleanup, instream); |
| 474 | instream = stream; |
| 475 | command_loop (); |
| 476 | do_cleanups (cleanups); |
| 477 | } |
| 478 | \f |
| 479 | int |
| 480 | main (argc, argv) |
| 481 | int argc; |
| 482 | char **argv; |
| 483 | { |
| 484 | int count; |
| 485 | static int quiet = 0; |
| 486 | static int batch = 0; |
| 487 | |
| 488 | /* Pointers to various arguments from command line. */ |
| 489 | char *symarg = NULL; |
| 490 | char *execarg = NULL; |
| 491 | char *corearg = NULL; |
| 492 | char *cdarg = NULL; |
| 493 | char *ttyarg = NULL; |
| 494 | |
| 495 | /* These are static so that we can take their address in an initializer. */ |
| 496 | static int print_help; |
| 497 | static int print_version; |
| 498 | |
| 499 | /* Pointers to all arguments of --command option. */ |
| 500 | char **cmdarg; |
| 501 | /* Allocated size of cmdarg. */ |
| 502 | int cmdsize; |
| 503 | /* Number of elements of cmdarg used. */ |
| 504 | int ncmd; |
| 505 | |
| 506 | /* Indices of all arguments of --directory option. */ |
| 507 | char **dirarg; |
| 508 | /* Allocated size. */ |
| 509 | int dirsize; |
| 510 | /* Number of elements used. */ |
| 511 | int ndir; |
| 512 | |
| 513 | struct stat homebuf, cwdbuf; |
| 514 | char *homedir, *homeinit; |
| 515 | |
| 516 | register int i; |
| 517 | |
| 518 | /* This needs to happen before the first use of malloc. */ |
| 519 | init_malloc ((PTR) NULL); |
| 520 | |
| 521 | #if defined (ALIGN_STACK_ON_STARTUP) |
| 522 | i = (int) &count & 0x3; |
| 523 | if (i != 0) |
| 524 | alloca (4 - i); |
| 525 | #endif |
| 526 | |
| 527 | /* If error() is called from initialization code, just exit */ |
| 528 | if (SET_TOP_LEVEL ()) { |
| 529 | exit(1); |
| 530 | } |
| 531 | |
| 532 | cmdsize = 1; |
| 533 | cmdarg = (char **) xmalloc (cmdsize * sizeof (*cmdarg)); |
| 534 | ncmd = 0; |
| 535 | dirsize = 1; |
| 536 | dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg)); |
| 537 | ndir = 0; |
| 538 | |
| 539 | quit_flag = 0; |
| 540 | line = (char *) xmalloc (linesize); |
| 541 | line[0] = '\0'; /* Terminate saved (now empty) cmd line */ |
| 542 | instream = stdin; |
| 543 | |
| 544 | getcwd (dirbuf, sizeof (dirbuf)); |
| 545 | current_directory = dirbuf; |
| 546 | |
| 547 | #ifdef SET_STACK_LIMIT_HUGE |
| 548 | { |
| 549 | struct rlimit rlim; |
| 550 | |
| 551 | /* Set the stack limit huge so that alloca (particularly stringtab |
| 552 | * in dbxread.c) does not fail. */ |
| 553 | getrlimit (RLIMIT_STACK, &rlim); |
| 554 | original_stack_limit = rlim.rlim_cur; |
| 555 | rlim.rlim_cur = rlim.rlim_max; |
| 556 | setrlimit (RLIMIT_STACK, &rlim); |
| 557 | } |
| 558 | #endif /* SET_STACK_LIMIT_HUGE */ |
| 559 | |
| 560 | /* Parse arguments and options. */ |
| 561 | { |
| 562 | int c; |
| 563 | /* When var field is 0, use flag field to record the equivalent |
| 564 | short option (or arbitrary numbers starting at 10 for those |
| 565 | with no equivalent). */ |
| 566 | static struct option long_options[] = |
| 567 | { |
| 568 | {"readnow", no_argument, &readnow_symbol_files, 1}, |
| 569 | {"r", no_argument, &readnow_symbol_files, 1}, |
| 570 | {"mapped", no_argument, &mapped_symbol_files, 1}, |
| 571 | {"m", no_argument, &mapped_symbol_files, 1}, |
| 572 | {"quiet", no_argument, &quiet, 1}, |
| 573 | {"q", no_argument, &quiet, 1}, |
| 574 | {"silent", no_argument, &quiet, 1}, |
| 575 | {"nx", no_argument, &inhibit_gdbinit, 1}, |
| 576 | {"n", no_argument, &inhibit_gdbinit, 1}, |
| 577 | {"batch", no_argument, &batch, 1}, |
| 578 | {"epoch", no_argument, &epoch_interface, 1}, |
| 579 | {"fullname", no_argument, &frame_file_full_name, 1}, |
| 580 | {"f", no_argument, &frame_file_full_name, 1}, |
| 581 | {"help", no_argument, &print_help, 1}, |
| 582 | {"se", required_argument, 0, 10}, |
| 583 | {"symbols", required_argument, 0, 's'}, |
| 584 | {"s", required_argument, 0, 's'}, |
| 585 | {"exec", required_argument, 0, 'e'}, |
| 586 | {"e", required_argument, 0, 'e'}, |
| 587 | {"core", required_argument, 0, 'c'}, |
| 588 | {"c", required_argument, 0, 'c'}, |
| 589 | {"command", required_argument, 0, 'x'}, |
| 590 | {"version", no_argument, &print_version, 1}, |
| 591 | {"x", required_argument, 0, 'x'}, |
| 592 | {"directory", required_argument, 0, 'd'}, |
| 593 | {"cd", required_argument, 0, 11}, |
| 594 | {"tty", required_argument, 0, 't'}, |
| 595 | {"baud", required_argument, 0, 'b'}, |
| 596 | {"b", required_argument, 0, 'b'}, |
| 597 | /* Allow machine descriptions to add more options... */ |
| 598 | #ifdef ADDITIONAL_OPTIONS |
| 599 | ADDITIONAL_OPTIONS |
| 600 | #endif |
| 601 | {0, no_argument, 0, 0}, |
| 602 | }; |
| 603 | |
| 604 | while (1) |
| 605 | { |
| 606 | int option_index; |
| 607 | |
| 608 | c = getopt_long_only (argc, argv, "", |
| 609 | long_options, &option_index); |
| 610 | if (c == EOF) |
| 611 | break; |
| 612 | |
| 613 | /* Long option that takes an argument. */ |
| 614 | if (c == 0 && long_options[option_index].flag == 0) |
| 615 | c = long_options[option_index].val; |
| 616 | |
| 617 | switch (c) |
| 618 | { |
| 619 | case 0: |
| 620 | /* Long option that just sets a flag. */ |
| 621 | break; |
| 622 | case 10: |
| 623 | symarg = optarg; |
| 624 | execarg = optarg; |
| 625 | break; |
| 626 | case 11: |
| 627 | cdarg = optarg; |
| 628 | break; |
| 629 | case 's': |
| 630 | symarg = optarg; |
| 631 | break; |
| 632 | case 'e': |
| 633 | execarg = optarg; |
| 634 | break; |
| 635 | case 'c': |
| 636 | corearg = optarg; |
| 637 | break; |
| 638 | case 'x': |
| 639 | cmdarg[ncmd++] = optarg; |
| 640 | if (ncmd >= cmdsize) |
| 641 | { |
| 642 | cmdsize *= 2; |
| 643 | cmdarg = (char **) xrealloc ((char *)cmdarg, |
| 644 | cmdsize * sizeof (*cmdarg)); |
| 645 | } |
| 646 | break; |
| 647 | case 'd': |
| 648 | dirarg[ndir++] = optarg; |
| 649 | if (ndir >= dirsize) |
| 650 | { |
| 651 | dirsize *= 2; |
| 652 | dirarg = (char **) xrealloc ((char *)dirarg, |
| 653 | dirsize * sizeof (*dirarg)); |
| 654 | } |
| 655 | break; |
| 656 | case 't': |
| 657 | ttyarg = optarg; |
| 658 | break; |
| 659 | case 'q': |
| 660 | quiet = 1; |
| 661 | break; |
| 662 | case 'b': |
| 663 | baud_rate = optarg; |
| 664 | break; |
| 665 | #ifdef ADDITIONAL_OPTION_CASES |
| 666 | ADDITIONAL_OPTION_CASES |
| 667 | #endif |
| 668 | case '?': |
| 669 | fprintf (stderr, |
| 670 | "Use `%s --help' for a complete list of options.\n", |
| 671 | argv[0]); |
| 672 | exit (1); |
| 673 | } |
| 674 | } |
| 675 | |
| 676 | /* OK, that's all the options. The other arguments are filenames. */ |
| 677 | count = 0; |
| 678 | for (; optind < argc; optind++) |
| 679 | switch (++count) |
| 680 | { |
| 681 | case 1: |
| 682 | symarg = argv[optind]; |
| 683 | execarg = argv[optind]; |
| 684 | break; |
| 685 | case 2: |
| 686 | corearg = argv[optind]; |
| 687 | break; |
| 688 | case 3: |
| 689 | fprintf (stderr, |
| 690 | "Excess command line arguments ignored. (%s%s)\n", |
| 691 | argv[optind], (optind == argc - 1) ? "" : " ..."); |
| 692 | break; |
| 693 | } |
| 694 | if (batch) |
| 695 | quiet = 1; |
| 696 | } |
| 697 | |
| 698 | /* Run the init function of each source file */ |
| 699 | |
| 700 | init_cmd_lists (); /* This needs to be done first */ |
| 701 | initialize_all_files (); |
| 702 | init_main (); /* But that omits this file! Do it now */ |
| 703 | init_signals (); |
| 704 | |
| 705 | /* Do these (and anything which might call wrap_here or *_filtered) |
| 706 | after initialize_all_files. */ |
| 707 | if (print_version) |
| 708 | { |
| 709 | print_gdb_version (stdout); |
| 710 | wrap_here (""); |
| 711 | printf_filtered ("\n"); |
| 712 | exit (0); |
| 713 | } |
| 714 | |
| 715 | if (print_help) |
| 716 | { |
| 717 | /* --version is intentionally not documented here, because we |
| 718 | are printing the version here, and the help is long enough |
| 719 | already. */ |
| 720 | |
| 721 | print_gdb_version (stdout); |
| 722 | /* Make sure the output gets printed. */ |
| 723 | wrap_here (""); |
| 724 | printf_filtered ("\n"); |
| 725 | |
| 726 | /* But don't use *_filtered here. We don't want to prompt for continue |
| 727 | no matter how small the screen or how much we're going to print. */ |
| 728 | fputs ("\ |
| 729 | This is the GNU debugger. Usage:\n\ |
| 730 | gdb [options] [executable-file [core-file or process-id]]\n\ |
| 731 | Options:\n\ |
| 732 | --help Print this message.\n\ |
| 733 | --quiet Do not print version number on startup.\n\ |
| 734 | --fullname Output information used by emacs-GDB interface.\n\ |
| 735 | --epoch Output information used by epoch emacs-GDB interface.\n\ |
| 736 | --batch Exit after processing options.\n\ |
| 737 | --nx Do not read .gdbinit file.\n\ |
| 738 | --tty=TTY Use TTY for input/output by the program being debugged.\n\ |
| 739 | --cd=DIR Change current directory to DIR.\n\ |
| 740 | --directory=DIR Search for source files in DIR.\n\ |
| 741 | --command=FILE Execute GDB commands from FILE.\n\ |
| 742 | --symbols=SYMFILE Read symbols from SYMFILE.\n\ |
| 743 | --exec=EXECFILE Use EXECFILE as the executable.\n\ |
| 744 | --se=FILE Use FILE as symbol file and executable file.\n\ |
| 745 | --core=COREFILE Analyze the core dump COREFILE.\n\ |
| 746 | -b BAUDRATE Set serial port baud rate used for remote debugging.\n\ |
| 747 | --mapped Use mapped symbol files if supported on this system.\n\ |
| 748 | --readnow Fully read symbol files on first access.\n\ |
| 749 | ", stdout); |
| 750 | #ifdef ADDITIONAL_OPTION_HELP |
| 751 | fputs (ADDITIONAL_OPTION_HELP, stdout); |
| 752 | #endif |
| 753 | fputs ("\n\ |
| 754 | For more information, type \"help\" from within GDB, or consult the\n\ |
| 755 | GDB manual (available as on-line info or a printed manual).\n", stdout); |
| 756 | exit (0); |
| 757 | } |
| 758 | |
| 759 | if (!quiet) |
| 760 | { |
| 761 | /* Print all the junk at the top, with trailing "..." if we are about |
| 762 | to read a symbol file (possibly slowly). */ |
| 763 | print_gnu_advertisement (); |
| 764 | print_gdb_version (stdout); |
| 765 | if (symarg) |
| 766 | printf_filtered (".."); |
| 767 | wrap_here(""); |
| 768 | fflush (stdout); /* Force to screen during slow operations */ |
| 769 | } |
| 770 | |
| 771 | error_pre_print = "\n\n"; |
| 772 | /* We may get more than one warning, don't double space all of them... */ |
| 773 | warning_pre_print = "\nwarning: "; |
| 774 | |
| 775 | /* We need a default language for parsing expressions, so simple things like |
| 776 | "set width 0" won't fail if no language is explicitly set in a config file |
| 777 | or implicitly set by reading an executable during startup. */ |
| 778 | set_language (language_c); |
| 779 | expected_language = current_language; /* don't warn about the change. */ |
| 780 | |
| 781 | /* Read and execute $HOME/.gdbinit file, if it exists. This is done |
| 782 | *before* all the command line arguments are processed; it sets |
| 783 | global parameters, which are independent of what file you are |
| 784 | debugging or what directory you are in. */ |
| 785 | homedir = getenv ("HOME"); |
| 786 | if (homedir) |
| 787 | { |
| 788 | homeinit = (char *) alloca (strlen (getenv ("HOME")) + |
| 789 | strlen (gdbinit) + 10); |
| 790 | strcpy (homeinit, getenv ("HOME")); |
| 791 | strcat (homeinit, "/"); |
| 792 | strcat (homeinit, gdbinit); |
| 793 | if (!inhibit_gdbinit && access (homeinit, R_OK) == 0) |
| 794 | { |
| 795 | if (!SET_TOP_LEVEL ()) |
| 796 | source_command (homeinit, 0); |
| 797 | } |
| 798 | do_cleanups (ALL_CLEANUPS); |
| 799 | |
| 800 | /* Do stats; no need to do them elsewhere since we'll only |
| 801 | need them if homedir is set. Make sure that they are |
| 802 | zero in case one of them fails (this guarantees that they |
| 803 | won't match if either exists). */ |
| 804 | |
| 805 | memset (&homebuf, 0, sizeof (struct stat)); |
| 806 | memset (&cwdbuf, 0, sizeof (struct stat)); |
| 807 | |
| 808 | stat (homeinit, &homebuf); |
| 809 | stat (gdbinit, &cwdbuf); /* We'll only need this if |
| 810 | homedir was set. */ |
| 811 | } |
| 812 | |
| 813 | /* Now perform all the actions indicated by the arguments. */ |
| 814 | if (cdarg != NULL) |
| 815 | { |
| 816 | if (!SET_TOP_LEVEL ()) |
| 817 | { |
| 818 | cd_command (cdarg, 0); |
| 819 | init_source_path (); |
| 820 | } |
| 821 | } |
| 822 | do_cleanups (ALL_CLEANUPS); |
| 823 | |
| 824 | for (i = 0; i < ndir; i++) |
| 825 | if (!SET_TOP_LEVEL ()) |
| 826 | directory_command (dirarg[i], 0); |
| 827 | free ((PTR)dirarg); |
| 828 | do_cleanups (ALL_CLEANUPS); |
| 829 | |
| 830 | if (execarg != NULL |
| 831 | && symarg != NULL |
| 832 | && STREQ (execarg, symarg)) |
| 833 | { |
| 834 | /* The exec file and the symbol-file are the same. If we can't open |
| 835 | it, better only print one error message. */ |
| 836 | if (!SET_TOP_LEVEL ()) |
| 837 | { |
| 838 | exec_file_command (execarg, !batch); |
| 839 | symbol_file_command (symarg, 0); |
| 840 | } |
| 841 | } |
| 842 | else |
| 843 | { |
| 844 | if (execarg != NULL) |
| 845 | if (!SET_TOP_LEVEL ()) |
| 846 | exec_file_command (execarg, !batch); |
| 847 | if (symarg != NULL) |
| 848 | if (!SET_TOP_LEVEL ()) |
| 849 | symbol_file_command (symarg, 0); |
| 850 | } |
| 851 | do_cleanups (ALL_CLEANUPS); |
| 852 | |
| 853 | /* After the symbol file has been read, print a newline to get us |
| 854 | beyond the copyright line... But errors should still set off |
| 855 | the error message with a (single) blank line. */ |
| 856 | if (!quiet) |
| 857 | printf_filtered ("\n"); |
| 858 | error_pre_print = "\n"; |
| 859 | warning_pre_print = "\nwarning: "; |
| 860 | |
| 861 | if (corearg != NULL) |
| 862 | if (!SET_TOP_LEVEL ()) |
| 863 | core_file_command (corearg, !batch); |
| 864 | else if (isdigit (corearg[0]) && !SET_TOP_LEVEL ()) |
| 865 | attach_command (corearg, !batch); |
| 866 | do_cleanups (ALL_CLEANUPS); |
| 867 | |
| 868 | if (ttyarg != NULL) |
| 869 | if (!SET_TOP_LEVEL ()) |
| 870 | tty_command (ttyarg, !batch); |
| 871 | do_cleanups (ALL_CLEANUPS); |
| 872 | |
| 873 | #ifdef ADDITIONAL_OPTION_HANDLER |
| 874 | ADDITIONAL_OPTION_HANDLER; |
| 875 | #endif |
| 876 | |
| 877 | /* Error messages should no longer be distinguished with extra output. */ |
| 878 | error_pre_print = 0; |
| 879 | warning_pre_print = "warning: "; |
| 880 | |
| 881 | /* Read the .gdbinit file in the current directory, *if* it isn't |
| 882 | the same as the $HOME/.gdbinit file (it should exist, also). */ |
| 883 | |
| 884 | if (!homedir |
| 885 | || memcmp ((char *) &homebuf, (char *) &cwdbuf, sizeof (struct stat))) |
| 886 | if (!inhibit_gdbinit && access (gdbinit, R_OK) == 0) |
| 887 | { |
| 888 | if (!SET_TOP_LEVEL ()) |
| 889 | source_command (gdbinit, 0); |
| 890 | } |
| 891 | do_cleanups (ALL_CLEANUPS); |
| 892 | |
| 893 | for (i = 0; i < ncmd; i++) |
| 894 | { |
| 895 | if (!SET_TOP_LEVEL ()) |
| 896 | { |
| 897 | if (cmdarg[i][0] == '-' && cmdarg[i][1] == '\0') |
| 898 | read_command_file (stdin); |
| 899 | else |
| 900 | source_command (cmdarg[i], !batch); |
| 901 | do_cleanups (ALL_CLEANUPS); |
| 902 | } |
| 903 | } |
| 904 | free ((PTR)cmdarg); |
| 905 | |
| 906 | /* Read in the old history after all the command files have been read. */ |
| 907 | init_history(); |
| 908 | |
| 909 | if (batch) |
| 910 | { |
| 911 | /* We have hit the end of the batch file. */ |
| 912 | exit (0); |
| 913 | } |
| 914 | |
| 915 | /* Do any host- or target-specific hacks. This is used for i960 targets |
| 916 | to force the user to set a nindy target and spec its parameters. */ |
| 917 | |
| 918 | #ifdef BEFORE_MAIN_LOOP_HOOK |
| 919 | BEFORE_MAIN_LOOP_HOOK; |
| 920 | #endif |
| 921 | |
| 922 | /* The command loop. */ |
| 923 | |
| 924 | while (1) |
| 925 | { |
| 926 | if (!SET_TOP_LEVEL ()) |
| 927 | { |
| 928 | do_cleanups (ALL_CLEANUPS); /* Do complete cleanup */ |
| 929 | command_loop (); |
| 930 | quit_command ((char *)0, instream == stdin); |
| 931 | } |
| 932 | } |
| 933 | /* No exit -- exit is through quit_command. */ |
| 934 | } |
| 935 | |
| 936 | void |
| 937 | execute_user_command (c, args) |
| 938 | struct cmd_list_element *c; |
| 939 | char *args; |
| 940 | { |
| 941 | register struct command_line *cmdlines; |
| 942 | struct cleanup *old_chain; |
| 943 | |
| 944 | if (args) |
| 945 | error ("User-defined commands cannot take arguments."); |
| 946 | |
| 947 | cmdlines = c->user_commands; |
| 948 | if (cmdlines == 0) |
| 949 | /* Null command */ |
| 950 | return; |
| 951 | |
| 952 | /* Set the instream to 0, indicating execution of a |
| 953 | user-defined function. */ |
| 954 | old_chain = make_cleanup (source_cleanup, instream); |
| 955 | instream = (FILE *) 0; |
| 956 | while (cmdlines) |
| 957 | { |
| 958 | execute_command (cmdlines->line, 0); |
| 959 | cmdlines = cmdlines->next; |
| 960 | } |
| 961 | do_cleanups (old_chain); |
| 962 | } |
| 963 | |
| 964 | /* Execute the line P as a command. |
| 965 | Pass FROM_TTY as second argument to the defining function. */ |
| 966 | |
| 967 | void |
| 968 | execute_command (p, from_tty) |
| 969 | char *p; |
| 970 | int from_tty; |
| 971 | { |
| 972 | register struct cmd_list_element *c; |
| 973 | register enum language flang; |
| 974 | static int warned = 0; |
| 975 | |
| 976 | free_all_values (); |
| 977 | |
| 978 | /* This can happen when command_line_input hits end of file. */ |
| 979 | if (p == NULL) |
| 980 | return; |
| 981 | |
| 982 | while (*p == ' ' || *p == '\t') p++; |
| 983 | if (*p) |
| 984 | { |
| 985 | char *arg; |
| 986 | |
| 987 | c = lookup_cmd (&p, cmdlist, "", 0, 1); |
| 988 | /* Pass null arg rather than an empty one. */ |
| 989 | arg = *p ? p : 0; |
| 990 | |
| 991 | /* If this command has been hooked, run the hook first. */ |
| 992 | if (c->hook) |
| 993 | execute_user_command (c->hook, (char *)0); |
| 994 | |
| 995 | if (c->class == class_user) |
| 996 | execute_user_command (c, arg); |
| 997 | else if (c->type == set_cmd || c->type == show_cmd) |
| 998 | do_setshow_command (arg, from_tty & caution, c); |
| 999 | else if (c->function.cfunc == NO_FUNCTION) |
| 1000 | error ("That is not a command, just a help topic."); |
| 1001 | else |
| 1002 | (*c->function.cfunc) (arg, from_tty & caution); |
| 1003 | } |
| 1004 | |
| 1005 | /* Tell the user if the language has changed (except first time). */ |
| 1006 | if (current_language != expected_language) |
| 1007 | { |
| 1008 | if (language_mode == language_mode_auto) { |
| 1009 | language_info (1); /* Print what changed. */ |
| 1010 | } |
| 1011 | warned = 0; |
| 1012 | } |
| 1013 | |
| 1014 | /* Warn the user if the working language does not match the |
| 1015 | language of the current frame. Only warn the user if we are |
| 1016 | actually running the program, i.e. there is a stack. */ |
| 1017 | /* FIXME: This should be cacheing the frame and only running when |
| 1018 | the frame changes. */ |
| 1019 | if (target_has_stack) |
| 1020 | { |
| 1021 | flang = get_frame_language (); |
| 1022 | if (!warned |
| 1023 | && flang != language_unknown |
| 1024 | && flang != current_language->la_language) |
| 1025 | { |
| 1026 | printf_filtered ("%s\n", lang_frame_mismatch_warn); |
| 1027 | warned = 1; |
| 1028 | } |
| 1029 | } |
| 1030 | } |
| 1031 | |
| 1032 | /* ARGSUSED */ |
| 1033 | static void |
| 1034 | command_loop_marker (foo) |
| 1035 | int foo; |
| 1036 | { |
| 1037 | } |
| 1038 | |
| 1039 | /* Read commands from `instream' and execute them |
| 1040 | until end of file or error reading instream. */ |
| 1041 | static void |
| 1042 | command_loop () |
| 1043 | { |
| 1044 | struct cleanup *old_chain; |
| 1045 | char *command; |
| 1046 | int stdin_is_tty = ISATTY (stdin); |
| 1047 | |
| 1048 | while (!feof (instream)) |
| 1049 | { |
| 1050 | if (window_hook && instream == stdin) |
| 1051 | (*window_hook) (instream, prompt); |
| 1052 | |
| 1053 | quit_flag = 0; |
| 1054 | if (instream == stdin && stdin_is_tty) |
| 1055 | reinitialize_more_filter (); |
| 1056 | old_chain = make_cleanup (command_loop_marker, 0); |
| 1057 | command = command_line_input (instream == stdin ? prompt : (char *) NULL, |
| 1058 | instream == stdin); |
| 1059 | if (command == 0) |
| 1060 | return; |
| 1061 | execute_command (command, instream == stdin); |
| 1062 | /* Do any commands attached to breakpoint we stopped at. */ |
| 1063 | bpstat_do_actions (&stop_bpstat); |
| 1064 | do_cleanups (old_chain); |
| 1065 | } |
| 1066 | } |
| 1067 | \f |
| 1068 | /* Commands call this if they do not want to be repeated by null lines. */ |
| 1069 | |
| 1070 | void |
| 1071 | dont_repeat () |
| 1072 | { |
| 1073 | /* If we aren't reading from standard input, we are saving the last |
| 1074 | thing read from stdin in line and don't want to delete it. Null lines |
| 1075 | won't repeat here in any case. */ |
| 1076 | if (instream == stdin) |
| 1077 | *line = 0; |
| 1078 | } |
| 1079 | \f |
| 1080 | /* Read a line from the stream "instream" without command line editing. |
| 1081 | |
| 1082 | It prints PRROMPT once at the start. |
| 1083 | Action is compatible with "readline", e.g. space for the result is |
| 1084 | malloc'd and should be freed by the caller. |
| 1085 | |
| 1086 | A NULL return means end of file. */ |
| 1087 | char * |
| 1088 | gdb_readline (prrompt) |
| 1089 | char *prrompt; |
| 1090 | { |
| 1091 | int c; |
| 1092 | char *result; |
| 1093 | int input_index = 0; |
| 1094 | int result_size = 80; |
| 1095 | |
| 1096 | if (prrompt) |
| 1097 | { |
| 1098 | /* Don't use a _filtered function here. It causes the assumed |
| 1099 | character position to be off, since the newline we read from |
| 1100 | the user is not accounted for. */ |
| 1101 | fputs (prrompt, stdout); |
| 1102 | fflush (stdout); |
| 1103 | } |
| 1104 | |
| 1105 | result = (char *) xmalloc (result_size); |
| 1106 | |
| 1107 | while (1) |
| 1108 | { |
| 1109 | /* Read from stdin if we are executing a user defined command. |
| 1110 | This is the right thing for prompt_for_continue, at least. */ |
| 1111 | c = fgetc (instream ? instream : stdin); |
| 1112 | |
| 1113 | if (c == EOF) |
| 1114 | { |
| 1115 | free (result); |
| 1116 | return NULL; |
| 1117 | } |
| 1118 | |
| 1119 | if (c == '\n') |
| 1120 | break; |
| 1121 | |
| 1122 | result[input_index++] = c; |
| 1123 | while (input_index >= result_size) |
| 1124 | { |
| 1125 | result_size *= 2; |
| 1126 | result = (char *) xrealloc (result, result_size); |
| 1127 | } |
| 1128 | } |
| 1129 | |
| 1130 | result[input_index++] = '\0'; |
| 1131 | return result; |
| 1132 | } |
| 1133 | |
| 1134 | /* Variables which control command line editing and history |
| 1135 | substitution. These variables are given default values at the end |
| 1136 | of this file. */ |
| 1137 | static int command_editing_p; |
| 1138 | static int history_expansion_p; |
| 1139 | static int write_history_p; |
| 1140 | static int history_size; |
| 1141 | static char *history_filename; |
| 1142 | |
| 1143 | /* readline uses the word breaks for two things: |
| 1144 | (1) In figuring out where to point the TEXT parameter to the |
| 1145 | rl_completion_entry_function. Since we don't use TEXT for much, |
| 1146 | it doesn't matter a lot what the word breaks are for this purpose, but |
| 1147 | it does affect how much stuff M-? lists. |
| 1148 | (2) If one of the matches contains a word break character, readline |
| 1149 | will quote it. That's why we switch between |
| 1150 | gdb_completer_word_break_characters and |
| 1151 | gdb_completer_command_word_break_characters. I'm not sure when |
| 1152 | we need this behavior (perhaps for funky characters in C++ symbols?). */ |
| 1153 | |
| 1154 | /* Variables which are necessary for fancy command line editing. */ |
| 1155 | char *gdb_completer_word_break_characters = |
| 1156 | " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-"; |
| 1157 | |
| 1158 | /* When completing on command names, we remove '-' from the list of |
| 1159 | word break characters, since we use it in command names. If the |
| 1160 | readline library sees one in any of the current completion strings, |
| 1161 | it thinks that the string needs to be quoted and automatically supplies |
| 1162 | a leading quote. */ |
| 1163 | char *gdb_completer_command_word_break_characters = |
| 1164 | " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,"; |
| 1165 | |
| 1166 | /* Characters that can be used to quote completion strings. Note that we |
| 1167 | can't include '"' because the gdb C parser treats such quoted sequences |
| 1168 | as strings. */ |
| 1169 | char *gdb_completer_quote_characters = |
| 1170 | "'"; |
| 1171 | |
| 1172 | /* Functions that are used as part of the fancy command line editing. */ |
| 1173 | |
| 1174 | /* This can be used for functions which don't want to complete on symbols |
| 1175 | but don't want to complete on anything else either. */ |
| 1176 | /* ARGSUSED */ |
| 1177 | char ** |
| 1178 | noop_completer (text, prefix) |
| 1179 | char *text; |
| 1180 | char *prefix; |
| 1181 | { |
| 1182 | return NULL; |
| 1183 | } |
| 1184 | |
| 1185 | /* Complete on filenames. */ |
| 1186 | char ** |
| 1187 | filename_completer (text, word) |
| 1188 | char *text; |
| 1189 | char *word; |
| 1190 | { |
| 1191 | /* From readline. */ |
| 1192 | extern char *filename_completion_function (); |
| 1193 | int subsequent_name; |
| 1194 | char **return_val; |
| 1195 | int return_val_used; |
| 1196 | int return_val_alloced; |
| 1197 | |
| 1198 | return_val_used = 0; |
| 1199 | /* Small for testing. */ |
| 1200 | return_val_alloced = 1; |
| 1201 | return_val = (char **) xmalloc (return_val_alloced * sizeof (char *)); |
| 1202 | |
| 1203 | subsequent_name = 0; |
| 1204 | while (1) |
| 1205 | { |
| 1206 | char *p; |
| 1207 | p = filename_completion_function (text, subsequent_name); |
| 1208 | if (return_val_used >= return_val_alloced) |
| 1209 | { |
| 1210 | return_val_alloced *= 2; |
| 1211 | return_val = |
| 1212 | (char **) xrealloc (return_val, |
| 1213 | return_val_alloced * sizeof (char *)); |
| 1214 | } |
| 1215 | if (p == NULL) |
| 1216 | { |
| 1217 | return_val[return_val_used++] = p; |
| 1218 | break; |
| 1219 | } |
| 1220 | /* Like emacs, don't complete on old versions. Especially useful |
| 1221 | in the "source" command. */ |
| 1222 | if (p[strlen (p) - 1] == '~') |
| 1223 | continue; |
| 1224 | |
| 1225 | { |
| 1226 | char *q; |
| 1227 | if (word == text) |
| 1228 | /* Return exactly p. */ |
| 1229 | return_val[return_val_used++] = p; |
| 1230 | else if (word > text) |
| 1231 | { |
| 1232 | /* Return some portion of p. */ |
| 1233 | q = xmalloc (strlen (p) + 5); |
| 1234 | strcpy (q, p + (word - text)); |
| 1235 | return_val[return_val_used++] = q; |
| 1236 | free (p); |
| 1237 | } |
| 1238 | else |
| 1239 | { |
| 1240 | /* Return some of TEXT plus p. */ |
| 1241 | q = xmalloc (strlen (p) + (text - word) + 5); |
| 1242 | strncpy (q, word, text - word); |
| 1243 | q[text - word] = '\0'; |
| 1244 | strcat (q, p); |
| 1245 | return_val[return_val_used++] = q; |
| 1246 | free (p); |
| 1247 | } |
| 1248 | } |
| 1249 | subsequent_name = 1; |
| 1250 | } |
| 1251 | #if 0 |
| 1252 | /* There is no way to do this just long enough to affect quote inserting |
| 1253 | without also affecting the next completion. This should be fixed in |
| 1254 | readline. FIXME. */ |
| 1255 | /* Insure that readline does the right thing |
| 1256 | with respect to inserting quotes. */ |
| 1257 | rl_completer_word_break_characters = ""; |
| 1258 | #endif |
| 1259 | return return_val; |
| 1260 | } |
| 1261 | |
| 1262 | /* Here are some useful test cases for completion. FIXME: These should |
| 1263 | be put in the test suite. They should be tested with both M-? and TAB. |
| 1264 | |
| 1265 | "show output-" "radix" |
| 1266 | "show output" "-radix" |
| 1267 | "p" ambiguous (commands starting with p--path, print, printf, etc.) |
| 1268 | "p " ambiguous (all symbols) |
| 1269 | "info t foo" no completions |
| 1270 | "info t " no completions |
| 1271 | "info t" ambiguous ("info target", "info terminal", etc.) |
| 1272 | "info ajksdlfk" no completions |
| 1273 | "info ajksdlfk " no completions |
| 1274 | "info" " " |
| 1275 | "info " ambiguous (all info commands) |
| 1276 | "p \"a" no completions (string constant) |
| 1277 | "p 'a" ambiguous (all symbols starting with a) |
| 1278 | "p b-a" ambiguous (all symbols starting with a) |
| 1279 | "p b-" ambiguous (all symbols) |
| 1280 | "file Make" "file" (word break hard to screw up here) |
| 1281 | "file ../gdb.stabs/wi" "erd" (needs to not break word at slash) |
| 1282 | */ |
| 1283 | |
| 1284 | /* Generate completions one by one for the completer. Each time we are |
| 1285 | called return another potential completion to the caller. The function |
| 1286 | is misnamed; it just completes on commands or passes the buck to the |
| 1287 | command's completer function; the stuff specific to symbol completion |
| 1288 | is in make_symbol_completion_list. |
| 1289 | |
| 1290 | TEXT is readline's idea of the "word" we are looking at; we don't really |
| 1291 | like readline's ideas about word breaking so we ignore it. |
| 1292 | |
| 1293 | MATCHES is the number of matches that have currently been collected from |
| 1294 | calling this completion function. When zero, then we need to initialize, |
| 1295 | otherwise the initialization has already taken place and we can just |
| 1296 | return the next potential completion string. |
| 1297 | |
| 1298 | Returns NULL if there are no more completions, else a pointer to a string |
| 1299 | which is a possible completion. |
| 1300 | |
| 1301 | RL_LINE_BUFFER is available to be looked at; it contains the entire text |
| 1302 | of the line. RL_POINT is the offset in that line of the cursor. You |
| 1303 | should pretend that the line ends at RL_POINT. */ |
| 1304 | |
| 1305 | static char * |
| 1306 | symbol_completion_function (text, matches) |
| 1307 | char *text; |
| 1308 | int matches; |
| 1309 | { |
| 1310 | static char **list = (char **)NULL; /* Cache of completions */ |
| 1311 | static int index; /* Next cached completion */ |
| 1312 | char *output = NULL; |
| 1313 | char *tmp_command, *p; |
| 1314 | /* Pointer within tmp_command which corresponds to text. */ |
| 1315 | char *word; |
| 1316 | struct cmd_list_element *c, *result_list; |
| 1317 | extern char *rl_line_buffer; |
| 1318 | extern int rl_point; |
| 1319 | |
| 1320 | if (matches == 0) |
| 1321 | { |
| 1322 | /* The caller is beginning to accumulate a new set of completions, so |
| 1323 | we need to find all of them now, and cache them for returning one at |
| 1324 | a time on future calls. */ |
| 1325 | |
| 1326 | if (list) |
| 1327 | { |
| 1328 | /* Free the storage used by LIST, but not by the strings inside. |
| 1329 | This is because rl_complete_internal () frees the strings. */ |
| 1330 | free ((PTR)list); |
| 1331 | } |
| 1332 | list = 0; |
| 1333 | index = 0; |
| 1334 | |
| 1335 | /* Choose the default set of word break characters to break completions. |
| 1336 | If we later find out that we are doing completions on command strings |
| 1337 | (as opposed to strings supplied by the individual command completer |
| 1338 | functions, which can be any string) then we will switch to the |
| 1339 | special word break set for command strings, which leaves out the |
| 1340 | '-' character used in some commands. */ |
| 1341 | |
| 1342 | rl_completer_word_break_characters = |
| 1343 | gdb_completer_word_break_characters; |
| 1344 | |
| 1345 | /* Decide whether to complete on a list of gdb commands or on symbols. */ |
| 1346 | tmp_command = (char *) alloca (rl_point + 1); |
| 1347 | p = tmp_command; |
| 1348 | |
| 1349 | strncpy (tmp_command, rl_line_buffer, rl_point); |
| 1350 | tmp_command[rl_point] = '\0'; |
| 1351 | /* Since text always contains some number of characters leading up |
| 1352 | to rl_point, we can find the equivalent position in tmp_command |
| 1353 | by subtracting that many characters from the end of tmp_command. */ |
| 1354 | word = tmp_command + rl_point - strlen (text); |
| 1355 | |
| 1356 | if (rl_point == 0) |
| 1357 | { |
| 1358 | /* An empty line we want to consider ambiguous; that is, it |
| 1359 | could be any command. */ |
| 1360 | c = (struct cmd_list_element *) -1; |
| 1361 | result_list = 0; |
| 1362 | } |
| 1363 | else |
| 1364 | { |
| 1365 | c = lookup_cmd_1 (&p, cmdlist, &result_list, 1); |
| 1366 | } |
| 1367 | |
| 1368 | /* Move p up to the next interesting thing. */ |
| 1369 | while (*p == ' ' || *p == '\t') |
| 1370 | { |
| 1371 | p++; |
| 1372 | } |
| 1373 | |
| 1374 | if (!c) |
| 1375 | { |
| 1376 | /* It is an unrecognized command. So there are no |
| 1377 | possible completions. */ |
| 1378 | list = NULL; |
| 1379 | } |
| 1380 | else if (c == (struct cmd_list_element *) -1) |
| 1381 | { |
| 1382 | char *q; |
| 1383 | |
| 1384 | /* lookup_cmd_1 advances p up to the first ambiguous thing, but |
| 1385 | doesn't advance over that thing itself. Do so now. */ |
| 1386 | q = p; |
| 1387 | while (*q && (isalnum (*q) || *q == '-' || *q == '_')) |
| 1388 | ++q; |
| 1389 | if (q != tmp_command + rl_point) |
| 1390 | { |
| 1391 | /* There is something beyond the ambiguous |
| 1392 | command, so there are no possible completions. For |
| 1393 | example, "info t " or "info t foo" does not complete |
| 1394 | to anything, because "info t" can be "info target" or |
| 1395 | "info terminal". */ |
| 1396 | list = NULL; |
| 1397 | } |
| 1398 | else |
| 1399 | { |
| 1400 | /* We're trying to complete on the command which was ambiguous. |
| 1401 | This we can deal with. */ |
| 1402 | if (result_list) |
| 1403 | { |
| 1404 | list = complete_on_cmdlist (*result_list->prefixlist, p, |
| 1405 | word); |
| 1406 | } |
| 1407 | else |
| 1408 | { |
| 1409 | list = complete_on_cmdlist (cmdlist, p, word); |
| 1410 | } |
| 1411 | /* Insure that readline does the right thing with respect to |
| 1412 | inserting quotes. */ |
| 1413 | rl_completer_word_break_characters = |
| 1414 | gdb_completer_command_word_break_characters; |
| 1415 | } |
| 1416 | } |
| 1417 | else |
| 1418 | { |
| 1419 | /* We've recognized a full command. */ |
| 1420 | |
| 1421 | if (p == tmp_command + rl_point) |
| 1422 | { |
| 1423 | /* There is no non-whitespace in the line beyond the command. */ |
| 1424 | |
| 1425 | if (p[-1] == ' ' || p[-1] == '\t') |
| 1426 | { |
| 1427 | /* The command is followed by whitespace; we need to complete |
| 1428 | on whatever comes after command. */ |
| 1429 | if (c->prefixlist) |
| 1430 | { |
| 1431 | /* It is a prefix command; what comes after it is |
| 1432 | a subcommand (e.g. "info "). */ |
| 1433 | list = complete_on_cmdlist (*c->prefixlist, p, word); |
| 1434 | |
| 1435 | /* Insure that readline does the right thing |
| 1436 | with respect to inserting quotes. */ |
| 1437 | rl_completer_word_break_characters = |
| 1438 | gdb_completer_command_word_break_characters; |
| 1439 | } |
| 1440 | else |
| 1441 | { |
| 1442 | /* It is a normal command; what comes after it is |
| 1443 | completed by the command's completer function. */ |
| 1444 | list = (*c->completer) (p, word); |
| 1445 | } |
| 1446 | } |
| 1447 | else |
| 1448 | { |
| 1449 | /* The command is not followed by whitespace; we need to |
| 1450 | complete on the command itself. e.g. "p" which is a |
| 1451 | command itself but also can complete to "print", "ptype" |
| 1452 | etc. */ |
| 1453 | char *q; |
| 1454 | |
| 1455 | /* Find the command we are completing on. */ |
| 1456 | q = p; |
| 1457 | while (q > tmp_command) |
| 1458 | { |
| 1459 | if (isalnum (q[-1]) || q[-1] == '-' || q[-1] == '_') |
| 1460 | --q; |
| 1461 | else |
| 1462 | break; |
| 1463 | } |
| 1464 | |
| 1465 | list = complete_on_cmdlist (result_list, q, word); |
| 1466 | |
| 1467 | /* Insure that readline does the right thing |
| 1468 | with respect to inserting quotes. */ |
| 1469 | rl_completer_word_break_characters = |
| 1470 | gdb_completer_command_word_break_characters; |
| 1471 | } |
| 1472 | } |
| 1473 | else |
| 1474 | { |
| 1475 | /* There is non-whitespace beyond the command. */ |
| 1476 | |
| 1477 | if (c->prefixlist && !c->allow_unknown) |
| 1478 | { |
| 1479 | /* It is an unrecognized subcommand of a prefix command, |
| 1480 | e.g. "info adsfkdj". */ |
| 1481 | list = NULL; |
| 1482 | } |
| 1483 | else |
| 1484 | { |
| 1485 | /* It is a normal command. */ |
| 1486 | list = (*c->completer) (p, word); |
| 1487 | } |
| 1488 | } |
| 1489 | } |
| 1490 | } |
| 1491 | |
| 1492 | /* If we found a list of potential completions during initialization then |
| 1493 | dole them out one at a time. The vector of completions is NULL |
| 1494 | terminated, so after returning the last one, return NULL (and continue |
| 1495 | to do so) each time we are called after that, until a new list is |
| 1496 | available. */ |
| 1497 | |
| 1498 | if (list) |
| 1499 | { |
| 1500 | output = list[index]; |
| 1501 | if (output) |
| 1502 | { |
| 1503 | index++; |
| 1504 | } |
| 1505 | } |
| 1506 | |
| 1507 | #if 0 |
| 1508 | /* Can't do this because readline hasn't yet checked the word breaks |
| 1509 | for figuring out whether to insert a quote. */ |
| 1510 | if (output == NULL) |
| 1511 | /* Make sure the word break characters are set back to normal for the |
| 1512 | next time that readline tries to complete something. */ |
| 1513 | rl_completer_word_break_characters = |
| 1514 | gdb_completer_word_break_characters; |
| 1515 | #endif |
| 1516 | |
| 1517 | return (output); |
| 1518 | } |
| 1519 | |
| 1520 | /* Skip over a possibly quoted word (as defined by the quote characters |
| 1521 | and word break characters the completer uses). Returns pointer to the |
| 1522 | location after the "word". */ |
| 1523 | |
| 1524 | char * |
| 1525 | skip_quoted (str) |
| 1526 | char *str; |
| 1527 | { |
| 1528 | char quote_char = '\0'; |
| 1529 | char *scan; |
| 1530 | |
| 1531 | for (scan = str; *scan != '\0'; scan++) |
| 1532 | { |
| 1533 | if (quote_char != '\0') |
| 1534 | { |
| 1535 | /* Ignore everything until the matching close quote char */ |
| 1536 | if (*scan == quote_char) |
| 1537 | { |
| 1538 | /* Found matching close quote. */ |
| 1539 | scan++; |
| 1540 | break; |
| 1541 | } |
| 1542 | } |
| 1543 | else if (strchr (gdb_completer_quote_characters, *scan)) |
| 1544 | { |
| 1545 | /* Found start of a quoted string. */ |
| 1546 | quote_char = *scan; |
| 1547 | } |
| 1548 | else if (strchr (gdb_completer_word_break_characters, *scan)) |
| 1549 | { |
| 1550 | break; |
| 1551 | } |
| 1552 | } |
| 1553 | return (scan); |
| 1554 | } |
| 1555 | |
| 1556 | \f |
| 1557 | #ifdef STOP_SIGNAL |
| 1558 | static void |
| 1559 | stop_sig (signo) |
| 1560 | int signo; |
| 1561 | { |
| 1562 | #if STOP_SIGNAL == SIGTSTP |
| 1563 | signal (SIGTSTP, SIG_DFL); |
| 1564 | sigsetmask (0); |
| 1565 | kill (getpid (), SIGTSTP); |
| 1566 | signal (SIGTSTP, stop_sig); |
| 1567 | #else |
| 1568 | signal (STOP_SIGNAL, stop_sig); |
| 1569 | #endif |
| 1570 | printf ("%s", prompt); |
| 1571 | fflush (stdout); |
| 1572 | |
| 1573 | /* Forget about any previous command -- null line now will do nothing. */ |
| 1574 | dont_repeat (); |
| 1575 | } |
| 1576 | #endif /* STOP_SIGNAL */ |
| 1577 | |
| 1578 | /* Initialize signal handlers. */ |
| 1579 | static void |
| 1580 | do_nothing (signo) |
| 1581 | int signo; |
| 1582 | { |
| 1583 | } |
| 1584 | |
| 1585 | static void |
| 1586 | init_signals () |
| 1587 | { |
| 1588 | signal (SIGINT, request_quit); |
| 1589 | |
| 1590 | /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get |
| 1591 | passed to the inferior, which we don't want. It would be |
| 1592 | possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but |
| 1593 | on BSD4.3 systems using vfork, that can affect the |
| 1594 | GDB process as well as the inferior (the signal handling tables |
| 1595 | might be in memory, shared between the two). Since we establish |
| 1596 | a handler for SIGQUIT, when we call exec it will set the signal |
| 1597 | to SIG_DFL for us. */ |
| 1598 | signal (SIGQUIT, do_nothing); |
| 1599 | if (signal (SIGHUP, do_nothing) != SIG_IGN) |
| 1600 | signal (SIGHUP, disconnect); |
| 1601 | signal (SIGFPE, float_handler); |
| 1602 | |
| 1603 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
| 1604 | signal (SIGWINCH, SIGWINCH_HANDLER); |
| 1605 | #endif |
| 1606 | } |
| 1607 | \f |
| 1608 | /* Read one line from the command input stream `instream' |
| 1609 | into the local static buffer `linebuffer' (whose current length |
| 1610 | is `linelength'). |
| 1611 | The buffer is made bigger as necessary. |
| 1612 | Returns the address of the start of the line. |
| 1613 | |
| 1614 | NULL is returned for end of file. |
| 1615 | |
| 1616 | *If* the instream == stdin & stdin is a terminal, the line read |
| 1617 | is copied into the file line saver (global var char *line, |
| 1618 | length linesize) so that it can be duplicated. |
| 1619 | |
| 1620 | This routine either uses fancy command line editing or |
| 1621 | simple input as the user has requested. */ |
| 1622 | |
| 1623 | char * |
| 1624 | command_line_input (prrompt, repeat) |
| 1625 | char *prrompt; |
| 1626 | int repeat; |
| 1627 | { |
| 1628 | static char *linebuffer = 0; |
| 1629 | static unsigned linelength = 0; |
| 1630 | register char *p; |
| 1631 | char *p1; |
| 1632 | char *rl; |
| 1633 | char *local_prompt = prrompt; |
| 1634 | register int c; |
| 1635 | char *nline; |
| 1636 | char got_eof = 0; |
| 1637 | |
| 1638 | if (linebuffer == 0) |
| 1639 | { |
| 1640 | linelength = 80; |
| 1641 | linebuffer = (char *) xmalloc (linelength); |
| 1642 | } |
| 1643 | |
| 1644 | p = linebuffer; |
| 1645 | |
| 1646 | /* Control-C quits instantly if typed while in this loop |
| 1647 | since it should not wait until the user types a newline. */ |
| 1648 | immediate_quit++; |
| 1649 | #ifdef STOP_SIGNAL |
| 1650 | if (job_control) |
| 1651 | signal (STOP_SIGNAL, stop_sig); |
| 1652 | #endif |
| 1653 | |
| 1654 | while (1) |
| 1655 | { |
| 1656 | /* Reports are that some Sys V's don't flush stdout/err on reads |
| 1657 | from stdin, when stdin/out are sockets rather than ttys. So we |
| 1658 | have to do it ourselves, to make emacs-gdb and xxgdb work. |
| 1659 | On other machines, doing this once per input should be a cheap nop. */ |
| 1660 | fflush (stdout); |
| 1661 | fflush (stderr); |
| 1662 | |
| 1663 | /* Don't use fancy stuff if not talking to stdin. */ |
| 1664 | if (command_editing_p && instream == stdin |
| 1665 | && ISATTY (instream)) |
| 1666 | rl = readline (local_prompt); |
| 1667 | else |
| 1668 | rl = gdb_readline (local_prompt); |
| 1669 | |
| 1670 | if (!rl || rl == (char *) EOF) |
| 1671 | { |
| 1672 | got_eof = 1; |
| 1673 | break; |
| 1674 | } |
| 1675 | if (strlen(rl) + 1 + (p - linebuffer) > linelength) |
| 1676 | { |
| 1677 | linelength = strlen(rl) + 1 + (p - linebuffer); |
| 1678 | nline = (char *) xrealloc (linebuffer, linelength); |
| 1679 | p += nline - linebuffer; |
| 1680 | linebuffer = nline; |
| 1681 | } |
| 1682 | p1 = rl; |
| 1683 | /* Copy line. Don't copy null at end. (Leaves line alone |
| 1684 | if this was just a newline) */ |
| 1685 | while (*p1) |
| 1686 | *p++ = *p1++; |
| 1687 | |
| 1688 | free (rl); /* Allocated in readline. */ |
| 1689 | |
| 1690 | if (p == linebuffer || *(p - 1) != '\\') |
| 1691 | break; |
| 1692 | |
| 1693 | p--; /* Put on top of '\'. */ |
| 1694 | local_prompt = (char *) 0; |
| 1695 | } |
| 1696 | |
| 1697 | #ifdef STOP_SIGNAL |
| 1698 | if (job_control) |
| 1699 | signal (STOP_SIGNAL, SIG_DFL); |
| 1700 | #endif |
| 1701 | immediate_quit--; |
| 1702 | |
| 1703 | if (got_eof) |
| 1704 | return NULL; |
| 1705 | |
| 1706 | /* Do history expansion if that is wished. */ |
| 1707 | if (history_expansion_p && instream == stdin |
| 1708 | && ISATTY (instream)) |
| 1709 | { |
| 1710 | char *history_value; |
| 1711 | int expanded; |
| 1712 | |
| 1713 | *p = '\0'; /* Insert null now. */ |
| 1714 | expanded = history_expand (linebuffer, &history_value); |
| 1715 | if (expanded) |
| 1716 | { |
| 1717 | /* Print the changes. */ |
| 1718 | printf ("%s\n", history_value); |
| 1719 | |
| 1720 | /* If there was an error, call this function again. */ |
| 1721 | if (expanded < 0) |
| 1722 | { |
| 1723 | free (history_value); |
| 1724 | return command_line_input (prrompt, repeat); |
| 1725 | } |
| 1726 | if (strlen (history_value) > linelength) |
| 1727 | { |
| 1728 | linelength = strlen (history_value) + 1; |
| 1729 | linebuffer = (char *) xrealloc (linebuffer, linelength); |
| 1730 | } |
| 1731 | strcpy (linebuffer, history_value); |
| 1732 | p = linebuffer + strlen(linebuffer); |
| 1733 | free (history_value); |
| 1734 | } |
| 1735 | } |
| 1736 | |
| 1737 | /* If we just got an empty line, and that is supposed |
| 1738 | to repeat the previous command, return the value in the |
| 1739 | global buffer. */ |
| 1740 | if (repeat) |
| 1741 | { |
| 1742 | if (p == linebuffer) |
| 1743 | return line; |
| 1744 | p1 = linebuffer; |
| 1745 | while (*p1 == ' ' || *p1 == '\t') |
| 1746 | p1++; |
| 1747 | if (!*p1) |
| 1748 | return line; |
| 1749 | } |
| 1750 | |
| 1751 | *p = 0; |
| 1752 | |
| 1753 | /* Add line to history if appropriate. */ |
| 1754 | if (instream == stdin |
| 1755 | && ISATTY (stdin) && *linebuffer) |
| 1756 | add_history (linebuffer); |
| 1757 | |
| 1758 | /* Note: lines consisting soley of comments are added to the command |
| 1759 | history. This is useful when you type a command, and then |
| 1760 | realize you don't want to execute it quite yet. You can comment |
| 1761 | out the command and then later fetch it from the value history |
| 1762 | and remove the '#'. The kill ring is probably better, but some |
| 1763 | people are in the habit of commenting things out. */ |
| 1764 | p1 = linebuffer; |
| 1765 | while ((c = *p1++) != '\0') |
| 1766 | { |
| 1767 | if (c == '"') |
| 1768 | while ((c = *p1++) != '"') |
| 1769 | { |
| 1770 | /* Make sure an escaped '"' doesn't make us think the string |
| 1771 | is ended. */ |
| 1772 | if (c == '\\') |
| 1773 | parse_escape (&p1); |
| 1774 | if (c == '\0') |
| 1775 | break; |
| 1776 | } |
| 1777 | else if (c == '\'') |
| 1778 | while ((c = *p1++) != '\'') |
| 1779 | { |
| 1780 | /* Make sure an escaped '\'' doesn't make us think the string |
| 1781 | is ended. */ |
| 1782 | if (c == '\\') |
| 1783 | parse_escape (&p1); |
| 1784 | if (c == '\0') |
| 1785 | break; |
| 1786 | } |
| 1787 | else if (c == '#') |
| 1788 | { |
| 1789 | /* Found a comment. */ |
| 1790 | p1[-1] = '\0'; |
| 1791 | break; |
| 1792 | } |
| 1793 | } |
| 1794 | |
| 1795 | /* Save into global buffer if appropriate. */ |
| 1796 | if (repeat) |
| 1797 | { |
| 1798 | if (linelength > linesize) |
| 1799 | { |
| 1800 | line = xrealloc (line, linelength); |
| 1801 | linesize = linelength; |
| 1802 | } |
| 1803 | strcpy (line, linebuffer); |
| 1804 | return line; |
| 1805 | } |
| 1806 | |
| 1807 | return linebuffer; |
| 1808 | } |
| 1809 | \f |
| 1810 | /* Read lines from the input stream |
| 1811 | and accumulate them in a chain of struct command_line's |
| 1812 | which is then returned. */ |
| 1813 | |
| 1814 | struct command_line * |
| 1815 | read_command_lines () |
| 1816 | { |
| 1817 | struct command_line *first = 0; |
| 1818 | register struct command_line *next, *tail = 0; |
| 1819 | register char *p, *p1; |
| 1820 | struct cleanup *old_chain = 0; |
| 1821 | |
| 1822 | while (1) |
| 1823 | { |
| 1824 | dont_repeat (); |
| 1825 | p = command_line_input ((char *) NULL, instream == stdin); |
| 1826 | if (p == NULL) |
| 1827 | /* Treat end of file like "end". */ |
| 1828 | break; |
| 1829 | |
| 1830 | /* Remove leading and trailing blanks. */ |
| 1831 | while (*p == ' ' || *p == '\t') p++; |
| 1832 | p1 = p + strlen (p); |
| 1833 | while (p1 != p && (p1[-1] == ' ' || p1[-1] == '\t')) p1--; |
| 1834 | |
| 1835 | /* Is this "end"? */ |
| 1836 | if (p1 - p == 3 && !strncmp (p, "end", 3)) |
| 1837 | break; |
| 1838 | |
| 1839 | /* No => add this line to the chain of command lines. */ |
| 1840 | next = (struct command_line *) xmalloc (sizeof (struct command_line)); |
| 1841 | next->line = savestring (p, p1 - p); |
| 1842 | next->next = 0; |
| 1843 | if (tail) |
| 1844 | { |
| 1845 | tail->next = next; |
| 1846 | } |
| 1847 | else |
| 1848 | { |
| 1849 | /* We just read the first line. |
| 1850 | From now on, arrange to throw away the lines we have |
| 1851 | if we quit or get an error while inside this function. */ |
| 1852 | first = next; |
| 1853 | old_chain = make_cleanup (free_command_lines, &first); |
| 1854 | } |
| 1855 | tail = next; |
| 1856 | } |
| 1857 | |
| 1858 | dont_repeat (); |
| 1859 | |
| 1860 | /* Now we are about to return the chain to our caller, |
| 1861 | so freeing it becomes his responsibility. */ |
| 1862 | if (first) |
| 1863 | discard_cleanups (old_chain); |
| 1864 | return first; |
| 1865 | } |
| 1866 | |
| 1867 | /* Free a chain of struct command_line's. */ |
| 1868 | |
| 1869 | void |
| 1870 | free_command_lines (lptr) |
| 1871 | struct command_line **lptr; |
| 1872 | { |
| 1873 | register struct command_line *l = *lptr; |
| 1874 | register struct command_line *next; |
| 1875 | |
| 1876 | while (l) |
| 1877 | { |
| 1878 | next = l->next; |
| 1879 | free (l->line); |
| 1880 | free ((PTR)l); |
| 1881 | l = next; |
| 1882 | } |
| 1883 | } |
| 1884 | \f |
| 1885 | /* Add an element to the list of info subcommands. */ |
| 1886 | |
| 1887 | void |
| 1888 | add_info (name, fun, doc) |
| 1889 | char *name; |
| 1890 | void (*fun) PARAMS ((char *, int)); |
| 1891 | char *doc; |
| 1892 | { |
| 1893 | add_cmd (name, no_class, fun, doc, &infolist); |
| 1894 | } |
| 1895 | |
| 1896 | /* Add an alias to the list of info subcommands. */ |
| 1897 | |
| 1898 | void |
| 1899 | add_info_alias (name, oldname, abbrev_flag) |
| 1900 | char *name; |
| 1901 | char *oldname; |
| 1902 | int abbrev_flag; |
| 1903 | { |
| 1904 | add_alias_cmd (name, oldname, 0, abbrev_flag, &infolist); |
| 1905 | } |
| 1906 | |
| 1907 | /* The "info" command is defined as a prefix, with allow_unknown = 0. |
| 1908 | Therefore, its own definition is called only for "info" with no args. */ |
| 1909 | |
| 1910 | /* ARGSUSED */ |
| 1911 | static void |
| 1912 | info_command (arg, from_tty) |
| 1913 | char *arg; |
| 1914 | int from_tty; |
| 1915 | { |
| 1916 | printf ("\"info\" must be followed by the name of an info command.\n"); |
| 1917 | help_list (infolist, "info ", -1, stdout); |
| 1918 | } |
| 1919 | |
| 1920 | /* The "show" command with no arguments shows all the settings. */ |
| 1921 | |
| 1922 | /* ARGSUSED */ |
| 1923 | static void |
| 1924 | show_command (arg, from_tty) |
| 1925 | char *arg; |
| 1926 | int from_tty; |
| 1927 | { |
| 1928 | cmd_show_list (showlist, from_tty, ""); |
| 1929 | } |
| 1930 | \f |
| 1931 | /* Add an element to the list of commands. */ |
| 1932 | |
| 1933 | void |
| 1934 | add_com (name, class, fun, doc) |
| 1935 | char *name; |
| 1936 | enum command_class class; |
| 1937 | void (*fun) PARAMS ((char *, int)); |
| 1938 | char *doc; |
| 1939 | { |
| 1940 | add_cmd (name, class, fun, doc, &cmdlist); |
| 1941 | } |
| 1942 | |
| 1943 | /* Add an alias or abbreviation command to the list of commands. */ |
| 1944 | |
| 1945 | void |
| 1946 | add_com_alias (name, oldname, class, abbrev_flag) |
| 1947 | char *name; |
| 1948 | char *oldname; |
| 1949 | enum command_class class; |
| 1950 | int abbrev_flag; |
| 1951 | { |
| 1952 | add_alias_cmd (name, oldname, class, abbrev_flag, &cmdlist); |
| 1953 | } |
| 1954 | |
| 1955 | void |
| 1956 | error_no_arg (why) |
| 1957 | char *why; |
| 1958 | { |
| 1959 | error ("Argument required (%s).", why); |
| 1960 | } |
| 1961 | |
| 1962 | /* ARGSUSED */ |
| 1963 | static void |
| 1964 | help_command (command, from_tty) |
| 1965 | char *command; |
| 1966 | int from_tty; /* Ignored */ |
| 1967 | { |
| 1968 | help_cmd (command, stdout); |
| 1969 | } |
| 1970 | \f |
| 1971 | static void |
| 1972 | validate_comname (comname) |
| 1973 | char *comname; |
| 1974 | { |
| 1975 | register char *p; |
| 1976 | |
| 1977 | if (comname == 0) |
| 1978 | error_no_arg ("name of command to define"); |
| 1979 | |
| 1980 | p = comname; |
| 1981 | while (*p) |
| 1982 | { |
| 1983 | if (!isalnum(*p) && *p != '-') |
| 1984 | error ("Junk in argument list: \"%s\"", p); |
| 1985 | p++; |
| 1986 | } |
| 1987 | } |
| 1988 | |
| 1989 | /* This is just a placeholder in the command data structures. */ |
| 1990 | static void |
| 1991 | user_defined_command (ignore, from_tty) |
| 1992 | char *ignore; |
| 1993 | int from_tty; |
| 1994 | { |
| 1995 | } |
| 1996 | |
| 1997 | static void |
| 1998 | define_command (comname, from_tty) |
| 1999 | char *comname; |
| 2000 | int from_tty; |
| 2001 | { |
| 2002 | register struct command_line *cmds; |
| 2003 | register struct cmd_list_element *c, *newc, *hookc = 0; |
| 2004 | char *tem = comname; |
| 2005 | #define HOOK_STRING "hook-" |
| 2006 | #define HOOK_LEN 5 |
| 2007 | |
| 2008 | validate_comname (comname); |
| 2009 | |
| 2010 | /* Look it up, and verify that we got an exact match. */ |
| 2011 | c = lookup_cmd (&tem, cmdlist, "", -1, 1); |
| 2012 | if (c && !STREQ (comname, c->name)) |
| 2013 | c = 0; |
| 2014 | |
| 2015 | if (c) |
| 2016 | { |
| 2017 | if (c->class == class_user || c->class == class_alias) |
| 2018 | tem = "Redefine command \"%s\"? "; |
| 2019 | else |
| 2020 | tem = "Really redefine built-in command \"%s\"? "; |
| 2021 | if (!query (tem, c->name)) |
| 2022 | error ("Command \"%s\" not redefined.", c->name); |
| 2023 | } |
| 2024 | |
| 2025 | /* If this new command is a hook, then mark the command which it |
| 2026 | is hooking. Note that we allow hooking `help' commands, so that |
| 2027 | we can hook the `stop' pseudo-command. */ |
| 2028 | |
| 2029 | if (!strncmp (comname, HOOK_STRING, HOOK_LEN)) |
| 2030 | { |
| 2031 | /* Look up cmd it hooks, and verify that we got an exact match. */ |
| 2032 | tem = comname+HOOK_LEN; |
| 2033 | hookc = lookup_cmd (&tem, cmdlist, "", -1, 0); |
| 2034 | if (hookc && !STREQ (comname+HOOK_LEN, hookc->name)) |
| 2035 | hookc = 0; |
| 2036 | if (!hookc) |
| 2037 | { |
| 2038 | warning ("Your new `%s' command does not hook any existing command.", |
| 2039 | comname); |
| 2040 | if (!query ("Proceed? ", (char *)0)) |
| 2041 | error ("Not confirmed."); |
| 2042 | } |
| 2043 | } |
| 2044 | |
| 2045 | comname = savestring (comname, strlen (comname)); |
| 2046 | |
| 2047 | /* If the rest of the commands will be case insensitive, this one |
| 2048 | should behave in the same manner. */ |
| 2049 | for (tem = comname; *tem; tem++) |
| 2050 | if (isupper(*tem)) *tem = tolower(*tem); |
| 2051 | |
| 2052 | if (from_tty) |
| 2053 | { |
| 2054 | printf ("Type commands for definition of \"%s\".\n\ |
| 2055 | End with a line saying just \"end\".\n", comname); |
| 2056 | fflush (stdout); |
| 2057 | } |
| 2058 | |
| 2059 | cmds = read_command_lines (); |
| 2060 | |
| 2061 | if (c && c->class == class_user) |
| 2062 | free_command_lines (&c->user_commands); |
| 2063 | |
| 2064 | newc = add_cmd (comname, class_user, user_defined_command, |
| 2065 | (c && c->class == class_user) |
| 2066 | ? c->doc : savestring ("User-defined.", 13), &cmdlist); |
| 2067 | newc->user_commands = cmds; |
| 2068 | |
| 2069 | /* If this new command is a hook, then mark both commands as being |
| 2070 | tied. */ |
| 2071 | if (hookc) |
| 2072 | { |
| 2073 | hookc->hook = newc; /* Target gets hooked. */ |
| 2074 | newc->hookee = hookc; /* We are marked as hooking target cmd. */ |
| 2075 | } |
| 2076 | } |
| 2077 | |
| 2078 | static void |
| 2079 | document_command (comname, from_tty) |
| 2080 | char *comname; |
| 2081 | int from_tty; |
| 2082 | { |
| 2083 | struct command_line *doclines; |
| 2084 | register struct cmd_list_element *c; |
| 2085 | char *tem = comname; |
| 2086 | |
| 2087 | validate_comname (comname); |
| 2088 | |
| 2089 | c = lookup_cmd (&tem, cmdlist, "", 0, 1); |
| 2090 | |
| 2091 | if (c->class != class_user) |
| 2092 | error ("Command \"%s\" is built-in.", comname); |
| 2093 | |
| 2094 | if (from_tty) |
| 2095 | printf ("Type documentation for \"%s\".\n\ |
| 2096 | End with a line saying just \"end\".\n", comname); |
| 2097 | |
| 2098 | doclines = read_command_lines (); |
| 2099 | |
| 2100 | if (c->doc) free (c->doc); |
| 2101 | |
| 2102 | { |
| 2103 | register struct command_line *cl1; |
| 2104 | register int len = 0; |
| 2105 | |
| 2106 | for (cl1 = doclines; cl1; cl1 = cl1->next) |
| 2107 | len += strlen (cl1->line) + 1; |
| 2108 | |
| 2109 | c->doc = (char *) xmalloc (len + 1); |
| 2110 | *c->doc = 0; |
| 2111 | |
| 2112 | for (cl1 = doclines; cl1; cl1 = cl1->next) |
| 2113 | { |
| 2114 | strcat (c->doc, cl1->line); |
| 2115 | if (cl1->next) |
| 2116 | strcat (c->doc, "\n"); |
| 2117 | } |
| 2118 | } |
| 2119 | |
| 2120 | free_command_lines (&doclines); |
| 2121 | } |
| 2122 | \f |
| 2123 | static void |
| 2124 | print_gnu_advertisement() |
| 2125 | { |
| 2126 | printf ("\ |
| 2127 | GDB is free software and you are welcome to distribute copies of it\n\ |
| 2128 | under certain conditions; type \"show copying\" to see the conditions.\n\ |
| 2129 | There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\ |
| 2130 | "); |
| 2131 | } |
| 2132 | |
| 2133 | static void |
| 2134 | print_gdb_version (stream) |
| 2135 | FILE *stream; |
| 2136 | { |
| 2137 | fprintf_filtered (stream, "\ |
| 2138 | GDB %s (%s", version, host_canonical); |
| 2139 | |
| 2140 | if (strcmp(host_canonical, target_canonical)) |
| 2141 | fprintf_filtered (stream, " --target %s", target_canonical); |
| 2142 | |
| 2143 | fprintf_filtered (stream, "), "); |
| 2144 | wrap_here(""); |
| 2145 | fprintf_filtered (stream, "Copyright 1993 Free Software Foundation, Inc."); |
| 2146 | } |
| 2147 | |
| 2148 | /* ARGSUSED */ |
| 2149 | static void |
| 2150 | show_version (args, from_tty) |
| 2151 | char *args; |
| 2152 | int from_tty; |
| 2153 | { |
| 2154 | immediate_quit++; |
| 2155 | print_gnu_advertisement (); |
| 2156 | print_gdb_version (stdout); |
| 2157 | printf_filtered ("\n"); |
| 2158 | immediate_quit--; |
| 2159 | } |
| 2160 | \f |
| 2161 | /* xgdb calls this to reprint the usual GDB prompt. */ |
| 2162 | |
| 2163 | void |
| 2164 | print_prompt () |
| 2165 | { |
| 2166 | printf ("%s", prompt); |
| 2167 | fflush (stdout); |
| 2168 | } |
| 2169 | \f |
| 2170 | static void |
| 2171 | quit_command (args, from_tty) |
| 2172 | char *args; |
| 2173 | int from_tty; |
| 2174 | { |
| 2175 | if (inferior_pid != 0 && target_has_execution) |
| 2176 | { |
| 2177 | if (attach_flag) |
| 2178 | { |
| 2179 | if (query ("The program is running. Quit anyway (and detach it)? ")) |
| 2180 | target_detach (args, from_tty); |
| 2181 | else |
| 2182 | error ("Not confirmed."); |
| 2183 | } |
| 2184 | else |
| 2185 | { |
| 2186 | if (query ("The program is running. Quit anyway (and kill it)? ")) |
| 2187 | target_kill (); |
| 2188 | else |
| 2189 | error ("Not confirmed."); |
| 2190 | } |
| 2191 | } |
| 2192 | /* Save the history information if it is appropriate to do so. */ |
| 2193 | if (write_history_p && history_filename) |
| 2194 | write_history (history_filename); |
| 2195 | exit (0); |
| 2196 | } |
| 2197 | |
| 2198 | /* Returns whether GDB is running on a terminal and whether the user |
| 2199 | desires that questions be asked of them on that terminal. */ |
| 2200 | |
| 2201 | int |
| 2202 | input_from_terminal_p () |
| 2203 | { |
| 2204 | return gdb_has_a_terminal () && (instream == stdin) & caution; |
| 2205 | } |
| 2206 | \f |
| 2207 | /* ARGSUSED */ |
| 2208 | static void |
| 2209 | pwd_command (args, from_tty) |
| 2210 | char *args; |
| 2211 | int from_tty; |
| 2212 | { |
| 2213 | if (args) error ("The \"pwd\" command does not take an argument: %s", args); |
| 2214 | getcwd (dirbuf, sizeof (dirbuf)); |
| 2215 | |
| 2216 | if (!STREQ (dirbuf, current_directory)) |
| 2217 | printf ("Working directory %s\n (canonically %s).\n", |
| 2218 | current_directory, dirbuf); |
| 2219 | else |
| 2220 | printf ("Working directory %s.\n", current_directory); |
| 2221 | } |
| 2222 | |
| 2223 | static void |
| 2224 | cd_command (dir, from_tty) |
| 2225 | char *dir; |
| 2226 | int from_tty; |
| 2227 | { |
| 2228 | int len; |
| 2229 | /* Found something other than leading repetitions of "/..". */ |
| 2230 | int found_real_path; |
| 2231 | char *p; |
| 2232 | |
| 2233 | /* If the new directory is absolute, repeat is a no-op; if relative, |
| 2234 | repeat might be useful but is more likely to be a mistake. */ |
| 2235 | dont_repeat (); |
| 2236 | |
| 2237 | if (dir == 0) |
| 2238 | error_no_arg ("new working directory"); |
| 2239 | |
| 2240 | dir = tilde_expand (dir); |
| 2241 | make_cleanup (free, dir); |
| 2242 | |
| 2243 | if (chdir (dir) < 0) |
| 2244 | perror_with_name (dir); |
| 2245 | |
| 2246 | len = strlen (dir); |
| 2247 | dir = savestring (dir, len - (len > 1 && dir[len-1] == '/')); |
| 2248 | if (dir[0] == '/') |
| 2249 | current_directory = dir; |
| 2250 | else |
| 2251 | { |
| 2252 | if (current_directory[0] == '/' && current_directory[1] == '\0') |
| 2253 | current_directory = concat (current_directory, dir, NULL); |
| 2254 | else |
| 2255 | current_directory = concat (current_directory, "/", dir, NULL); |
| 2256 | free (dir); |
| 2257 | } |
| 2258 | |
| 2259 | /* Now simplify any occurrences of `.' and `..' in the pathname. */ |
| 2260 | |
| 2261 | found_real_path = 0; |
| 2262 | for (p = current_directory; *p;) |
| 2263 | { |
| 2264 | if (p[0] == '/' && p[1] == '.' && (p[2] == 0 || p[2] == '/')) |
| 2265 | strcpy (p, p + 2); |
| 2266 | else if (p[0] == '/' && p[1] == '.' && p[2] == '.' |
| 2267 | && (p[3] == 0 || p[3] == '/')) |
| 2268 | { |
| 2269 | if (found_real_path) |
| 2270 | { |
| 2271 | /* Search backwards for the directory just before the "/.." |
| 2272 | and obliterate it and the "/..". */ |
| 2273 | char *q = p; |
| 2274 | while (q != current_directory && q[-1] != '/') |
| 2275 | --q; |
| 2276 | |
| 2277 | if (q == current_directory) |
| 2278 | /* current_directory is |
| 2279 | a relative pathname ("can't happen"--leave it alone). */ |
| 2280 | ++p; |
| 2281 | else |
| 2282 | { |
| 2283 | strcpy (q - 1, p + 3); |
| 2284 | p = q - 1; |
| 2285 | } |
| 2286 | } |
| 2287 | else |
| 2288 | /* We are dealing with leading repetitions of "/..", for example |
| 2289 | "/../..", which is the Mach super-root. */ |
| 2290 | p += 3; |
| 2291 | } |
| 2292 | else |
| 2293 | { |
| 2294 | found_real_path = 1; |
| 2295 | ++p; |
| 2296 | } |
| 2297 | } |
| 2298 | |
| 2299 | forget_cached_source_info (); |
| 2300 | |
| 2301 | if (from_tty) |
| 2302 | pwd_command ((char *) 0, 1); |
| 2303 | } |
| 2304 | \f |
| 2305 | /* ARGSUSED */ |
| 2306 | static void |
| 2307 | source_command (args, from_tty) |
| 2308 | char *args; |
| 2309 | int from_tty; |
| 2310 | { |
| 2311 | FILE *stream; |
| 2312 | struct cleanup *cleanups; |
| 2313 | char *file = args; |
| 2314 | |
| 2315 | if (file == NULL) |
| 2316 | { |
| 2317 | error ("source command requires pathname of file to source."); |
| 2318 | } |
| 2319 | |
| 2320 | file = tilde_expand (file); |
| 2321 | make_cleanup (free, file); |
| 2322 | |
| 2323 | stream = fopen (file, FOPEN_RT); |
| 2324 | if (stream == 0) |
| 2325 | perror_with_name (file); |
| 2326 | |
| 2327 | cleanups = make_cleanup (fclose, stream); |
| 2328 | |
| 2329 | read_command_file (stream); |
| 2330 | |
| 2331 | do_cleanups (cleanups); |
| 2332 | } |
| 2333 | |
| 2334 | /* ARGSUSED */ |
| 2335 | static void |
| 2336 | echo_command (text, from_tty) |
| 2337 | char *text; |
| 2338 | int from_tty; |
| 2339 | { |
| 2340 | char *p = text; |
| 2341 | register int c; |
| 2342 | |
| 2343 | if (text) |
| 2344 | while ((c = *p++) != '\0') |
| 2345 | { |
| 2346 | if (c == '\\') |
| 2347 | { |
| 2348 | /* \ at end of argument is used after spaces |
| 2349 | so they won't be lost. */ |
| 2350 | if (*p == 0) |
| 2351 | return; |
| 2352 | |
| 2353 | c = parse_escape (&p); |
| 2354 | if (c >= 0) |
| 2355 | printf_filtered ("%c", c); |
| 2356 | } |
| 2357 | else |
| 2358 | printf_filtered ("%c", c); |
| 2359 | } |
| 2360 | |
| 2361 | /* Force this output to appear now. */ |
| 2362 | wrap_here (""); |
| 2363 | fflush (stdout); |
| 2364 | } |
| 2365 | |
| 2366 | \f |
| 2367 | /* Functions to manipulate command line editing control variables. */ |
| 2368 | |
| 2369 | /* Number of commands to print in each call to show_commands. */ |
| 2370 | #define Hist_print 10 |
| 2371 | static void |
| 2372 | show_commands (args, from_tty) |
| 2373 | char *args; |
| 2374 | int from_tty; |
| 2375 | { |
| 2376 | /* Index for history commands. Relative to history_base. */ |
| 2377 | int offset; |
| 2378 | |
| 2379 | /* Number of the history entry which we are planning to display next. |
| 2380 | Relative to history_base. */ |
| 2381 | static int num = 0; |
| 2382 | |
| 2383 | /* The first command in the history which doesn't exist (i.e. one more |
| 2384 | than the number of the last command). Relative to history_base. */ |
| 2385 | int hist_len; |
| 2386 | |
| 2387 | extern struct _hist_entry *history_get PARAMS ((int)); |
| 2388 | extern int history_base; |
| 2389 | |
| 2390 | /* Print out some of the commands from the command history. */ |
| 2391 | /* First determine the length of the history list. */ |
| 2392 | hist_len = history_size; |
| 2393 | for (offset = 0; offset < history_size; offset++) |
| 2394 | { |
| 2395 | if (!history_get (history_base + offset)) |
| 2396 | { |
| 2397 | hist_len = offset; |
| 2398 | break; |
| 2399 | } |
| 2400 | } |
| 2401 | |
| 2402 | if (args) |
| 2403 | { |
| 2404 | if (args[0] == '+' && args[1] == '\0') |
| 2405 | /* "info editing +" should print from the stored position. */ |
| 2406 | ; |
| 2407 | else |
| 2408 | /* "info editing <exp>" should print around command number <exp>. */ |
| 2409 | num = (parse_and_eval_address (args) - history_base) - Hist_print / 2; |
| 2410 | } |
| 2411 | /* "show commands" means print the last Hist_print commands. */ |
| 2412 | else |
| 2413 | { |
| 2414 | num = hist_len - Hist_print; |
| 2415 | } |
| 2416 | |
| 2417 | if (num < 0) |
| 2418 | num = 0; |
| 2419 | |
| 2420 | /* If there are at least Hist_print commands, we want to display the last |
| 2421 | Hist_print rather than, say, the last 6. */ |
| 2422 | if (hist_len - num < Hist_print) |
| 2423 | { |
| 2424 | num = hist_len - Hist_print; |
| 2425 | if (num < 0) |
| 2426 | num = 0; |
| 2427 | } |
| 2428 | |
| 2429 | for (offset = num; offset < num + Hist_print && offset < hist_len; offset++) |
| 2430 | { |
| 2431 | printf_filtered ("%5d %s\n", history_base + offset, |
| 2432 | (history_get (history_base + offset))->line); |
| 2433 | } |
| 2434 | |
| 2435 | /* The next command we want to display is the next one that we haven't |
| 2436 | displayed yet. */ |
| 2437 | num += Hist_print; |
| 2438 | |
| 2439 | /* If the user repeats this command with return, it should do what |
| 2440 | "show commands +" does. This is unnecessary if arg is null, |
| 2441 | because "show commands +" is not useful after "show commands". */ |
| 2442 | if (from_tty && args) |
| 2443 | { |
| 2444 | args[0] = '+'; |
| 2445 | args[1] = '\0'; |
| 2446 | } |
| 2447 | } |
| 2448 | |
| 2449 | /* Called by do_setshow_command. */ |
| 2450 | /* ARGSUSED */ |
| 2451 | static void |
| 2452 | set_history_size_command (args, from_tty, c) |
| 2453 | char *args; |
| 2454 | int from_tty; |
| 2455 | struct cmd_list_element *c; |
| 2456 | { |
| 2457 | if (history_size == INT_MAX) |
| 2458 | unstifle_history (); |
| 2459 | else if (history_size >= 0) |
| 2460 | stifle_history (history_size); |
| 2461 | else |
| 2462 | { |
| 2463 | history_size = INT_MAX; |
| 2464 | error ("History size must be non-negative"); |
| 2465 | } |
| 2466 | } |
| 2467 | |
| 2468 | /* ARGSUSED */ |
| 2469 | static void |
| 2470 | set_history (args, from_tty) |
| 2471 | char *args; |
| 2472 | int from_tty; |
| 2473 | { |
| 2474 | printf ("\"set history\" must be followed by the name of a history subcommand.\n"); |
| 2475 | help_list (sethistlist, "set history ", -1, stdout); |
| 2476 | } |
| 2477 | |
| 2478 | /* ARGSUSED */ |
| 2479 | static void |
| 2480 | show_history (args, from_tty) |
| 2481 | char *args; |
| 2482 | int from_tty; |
| 2483 | { |
| 2484 | cmd_show_list (showhistlist, from_tty, ""); |
| 2485 | } |
| 2486 | |
| 2487 | int info_verbose = 0; /* Default verbose msgs off */ |
| 2488 | |
| 2489 | /* Called by do_setshow_command. An elaborate joke. */ |
| 2490 | /* ARGSUSED */ |
| 2491 | static void |
| 2492 | set_verbose (args, from_tty, c) |
| 2493 | char *args; |
| 2494 | int from_tty; |
| 2495 | struct cmd_list_element *c; |
| 2496 | { |
| 2497 | char *cmdname = "verbose"; |
| 2498 | struct cmd_list_element *showcmd; |
| 2499 | |
| 2500 | showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1); |
| 2501 | |
| 2502 | if (info_verbose) |
| 2503 | { |
| 2504 | c->doc = "Set verbose printing of informational messages."; |
| 2505 | showcmd->doc = "Show verbose printing of informational messages."; |
| 2506 | } |
| 2507 | else |
| 2508 | { |
| 2509 | c->doc = "Set verbosity."; |
| 2510 | showcmd->doc = "Show verbosity."; |
| 2511 | } |
| 2512 | } |
| 2513 | |
| 2514 | static void |
| 2515 | float_handler (signo) |
| 2516 | int signo; |
| 2517 | { |
| 2518 | /* This message is based on ANSI C, section 4.7. Note that integer |
| 2519 | divide by zero causes this, so "float" is a misnomer. */ |
| 2520 | signal (SIGFPE, float_handler); |
| 2521 | error ("Erroneous arithmetic operation."); |
| 2522 | } |
| 2523 | |
| 2524 | /* Return whether we are running a batch file or from terminal. */ |
| 2525 | int |
| 2526 | batch_mode () |
| 2527 | { |
| 2528 | return !(instream == stdin && ISATTY (stdin)); |
| 2529 | } |
| 2530 | |
| 2531 | \f |
| 2532 | static void |
| 2533 | init_cmd_lists () |
| 2534 | { |
| 2535 | cmdlist = NULL; |
| 2536 | infolist = NULL; |
| 2537 | enablelist = NULL; |
| 2538 | disablelist = NULL; |
| 2539 | deletelist = NULL; |
| 2540 | enablebreaklist = NULL; |
| 2541 | setlist = NULL; |
| 2542 | unsetlist = NULL; |
| 2543 | showlist = NULL; |
| 2544 | sethistlist = NULL; |
| 2545 | showhistlist = NULL; |
| 2546 | unsethistlist = NULL; |
| 2547 | #if MAINTENANCE_CMDS |
| 2548 | maintenancelist = NULL; |
| 2549 | maintenanceinfolist = NULL; |
| 2550 | maintenanceprintlist = NULL; |
| 2551 | #endif |
| 2552 | setprintlist = NULL; |
| 2553 | showprintlist = NULL; |
| 2554 | setchecklist = NULL; |
| 2555 | showchecklist = NULL; |
| 2556 | } |
| 2557 | |
| 2558 | /* Init the history buffer. Note that we are called after the init file(s) |
| 2559 | * have been read so that the user can change the history file via his |
| 2560 | * .gdbinit file (for instance). The GDBHISTFILE environment variable |
| 2561 | * overrides all of this. |
| 2562 | */ |
| 2563 | |
| 2564 | static void |
| 2565 | init_history() |
| 2566 | { |
| 2567 | char *tmpenv; |
| 2568 | |
| 2569 | tmpenv = getenv ("HISTSIZE"); |
| 2570 | if (tmpenv) |
| 2571 | history_size = atoi (tmpenv); |
| 2572 | else if (!history_size) |
| 2573 | history_size = 256; |
| 2574 | |
| 2575 | stifle_history (history_size); |
| 2576 | |
| 2577 | tmpenv = getenv ("GDBHISTFILE"); |
| 2578 | if (tmpenv) |
| 2579 | history_filename = savestring (tmpenv, strlen(tmpenv)); |
| 2580 | else if (!history_filename) { |
| 2581 | /* We include the current directory so that if the user changes |
| 2582 | directories the file written will be the same as the one |
| 2583 | that was read. */ |
| 2584 | history_filename = concat (current_directory, "/.gdb_history", NULL); |
| 2585 | } |
| 2586 | read_history (history_filename); |
| 2587 | } |
| 2588 | |
| 2589 | static void |
| 2590 | init_main () |
| 2591 | { |
| 2592 | struct cmd_list_element *c; |
| 2593 | |
| 2594 | #ifdef DEFAULT_PROMPT |
| 2595 | prompt = savestring (DEFAULT_PROMPT, strlen(DEFAULT_PROMPT)); |
| 2596 | #else |
| 2597 | prompt = savestring ("(gdb) ", 6); |
| 2598 | #endif |
| 2599 | |
| 2600 | /* Set the important stuff up for command editing. */ |
| 2601 | command_editing_p = 1; |
| 2602 | history_expansion_p = 0; |
| 2603 | write_history_p = 0; |
| 2604 | |
| 2605 | /* Setup important stuff for command line editing. */ |
| 2606 | rl_completion_entry_function = (int (*)()) symbol_completion_function; |
| 2607 | rl_completer_word_break_characters = gdb_completer_word_break_characters; |
| 2608 | rl_completer_quote_characters = gdb_completer_quote_characters; |
| 2609 | rl_readline_name = "gdb"; |
| 2610 | |
| 2611 | /* Define the classes of commands. |
| 2612 | They will appear in the help list in the reverse of this order. */ |
| 2613 | |
| 2614 | add_cmd ("internals", class_maintenance, NO_FUNCTION, |
| 2615 | "Maintenance commands.\n\ |
| 2616 | Some gdb commands are provided just for use by gdb maintainers.\n\ |
| 2617 | These commands are subject to frequent change, and may not be as\n\ |
| 2618 | well documented as user commands.", |
| 2619 | &cmdlist); |
| 2620 | add_cmd ("obscure", class_obscure, NO_FUNCTION, "Obscure features.", &cmdlist); |
| 2621 | add_cmd ("aliases", class_alias, NO_FUNCTION, "Aliases of other commands.", &cmdlist); |
| 2622 | add_cmd ("user-defined", class_user, NO_FUNCTION, "User-defined commands.\n\ |
| 2623 | The commands in this class are those defined by the user.\n\ |
| 2624 | Use the \"define\" command to define a command.", &cmdlist); |
| 2625 | add_cmd ("support", class_support, NO_FUNCTION, "Support facilities.", &cmdlist); |
| 2626 | add_cmd ("status", class_info, NO_FUNCTION, "Status inquiries.", &cmdlist); |
| 2627 | add_cmd ("files", class_files, NO_FUNCTION, "Specifying and examining files.", &cmdlist); |
| 2628 | add_cmd ("breakpoints", class_breakpoint, NO_FUNCTION, "Making program stop at certain points.", &cmdlist); |
| 2629 | add_cmd ("data", class_vars, NO_FUNCTION, "Examining data.", &cmdlist); |
| 2630 | add_cmd ("stack", class_stack, NO_FUNCTION, "Examining the stack.\n\ |
| 2631 | The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\ |
| 2632 | counting from zero for the innermost (currently executing) frame.\n\n\ |
| 2633 | At any time gdb identifies one frame as the \"selected\" frame.\n\ |
| 2634 | Variable lookups are done with respect to the selected frame.\n\ |
| 2635 | When the program being debugged stops, gdb selects the innermost frame.\n\ |
| 2636 | The commands below can be used to select other frames by number or address.", |
| 2637 | &cmdlist); |
| 2638 | add_cmd ("running", class_run, NO_FUNCTION, "Running the program.", &cmdlist); |
| 2639 | |
| 2640 | add_com ("pwd", class_files, pwd_command, |
| 2641 | "Print working directory. This is used for your program as well."); |
| 2642 | c = add_cmd ("cd", class_files, cd_command, |
| 2643 | "Set working directory to DIR for debugger and program being debugged.\n\ |
| 2644 | The change does not take effect for the program being debugged\n\ |
| 2645 | until the next time it is started.", &cmdlist); |
| 2646 | c->completer = filename_completer; |
| 2647 | |
| 2648 | add_show_from_set |
| 2649 | (add_set_cmd ("prompt", class_support, var_string, (char *)&prompt, |
| 2650 | "Set gdb's prompt", |
| 2651 | &setlist), |
| 2652 | &showlist); |
| 2653 | |
| 2654 | add_com ("echo", class_support, echo_command, |
| 2655 | "Print a constant string. Give string as argument.\n\ |
| 2656 | C escape sequences may be used in the argument.\n\ |
| 2657 | No newline is added at the end of the argument;\n\ |
| 2658 | use \"\\n\" if you want a newline to be printed.\n\ |
| 2659 | Since leading and trailing whitespace are ignored in command arguments,\n\ |
| 2660 | if you want to print some you must use \"\\\" before leading whitespace\n\ |
| 2661 | to be printed or after trailing whitespace."); |
| 2662 | add_com ("document", class_support, document_command, |
| 2663 | "Document a user-defined command.\n\ |
| 2664 | Give command name as argument. Give documentation on following lines.\n\ |
| 2665 | End with a line of just \"end\"."); |
| 2666 | add_com ("define", class_support, define_command, |
| 2667 | "Define a new command name. Command name is argument.\n\ |
| 2668 | Definition appears on following lines, one command per line.\n\ |
| 2669 | End with a line of just \"end\".\n\ |
| 2670 | Use the \"document\" command to give documentation for the new command.\n\ |
| 2671 | Commands defined in this way do not take arguments."); |
| 2672 | |
| 2673 | #ifdef __STDC__ |
| 2674 | c = add_cmd ("source", class_support, source_command, |
| 2675 | "Read commands from a file named FILE.\n\ |
| 2676 | Note that the file \"" GDBINIT_FILENAME "\" is read automatically in this way\n\ |
| 2677 | when gdb is started.", &cmdlist); |
| 2678 | #else |
| 2679 | /* Punt file name, we can't help it easily. */ |
| 2680 | c = add_cmd ("source", class_support, source_command, |
| 2681 | "Read commands from a file named FILE.\n\ |
| 2682 | Note that the file \".gdbinit\" is read automatically in this way\n\ |
| 2683 | when gdb is started.", &cmdlist); |
| 2684 | #endif |
| 2685 | c->completer = filename_completer; |
| 2686 | |
| 2687 | add_com ("quit", class_support, quit_command, "Exit gdb."); |
| 2688 | add_com ("help", class_support, help_command, "Print list of commands."); |
| 2689 | add_com_alias ("q", "quit", class_support, 1); |
| 2690 | add_com_alias ("h", "help", class_support, 1); |
| 2691 | |
| 2692 | |
| 2693 | c = add_set_cmd ("verbose", class_support, var_boolean, (char *)&info_verbose, |
| 2694 | "Set ", |
| 2695 | &setlist), |
| 2696 | add_show_from_set (c, &showlist); |
| 2697 | c->function.sfunc = set_verbose; |
| 2698 | set_verbose (NULL, 0, c); |
| 2699 | |
| 2700 | add_show_from_set |
| 2701 | (add_set_cmd ("editing", class_support, var_boolean, (char *)&command_editing_p, |
| 2702 | "Set editing of command lines as they are typed.\n\ |
| 2703 | Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\ |
| 2704 | Without an argument, command line editing is enabled. To edit, use\n\ |
| 2705 | EMACS-like or VI-like commands like control-P or ESC.", &setlist), |
| 2706 | &showlist); |
| 2707 | |
| 2708 | add_prefix_cmd ("history", class_support, set_history, |
| 2709 | "Generic command for setting command history parameters.", |
| 2710 | &sethistlist, "set history ", 0, &setlist); |
| 2711 | add_prefix_cmd ("history", class_support, show_history, |
| 2712 | "Generic command for showing command history parameters.", |
| 2713 | &showhistlist, "show history ", 0, &showlist); |
| 2714 | |
| 2715 | add_show_from_set |
| 2716 | (add_set_cmd ("expansion", no_class, var_boolean, (char *)&history_expansion_p, |
| 2717 | "Set history expansion on command input.\n\ |
| 2718 | Without an argument, history expansion is enabled.", &sethistlist), |
| 2719 | &showhistlist); |
| 2720 | |
| 2721 | add_show_from_set |
| 2722 | (add_set_cmd ("save", no_class, var_boolean, (char *)&write_history_p, |
| 2723 | "Set saving of the history record on exit.\n\ |
| 2724 | Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\ |
| 2725 | Without an argument, saving is enabled.", &sethistlist), |
| 2726 | &showhistlist); |
| 2727 | |
| 2728 | c = add_set_cmd ("size", no_class, var_integer, (char *)&history_size, |
| 2729 | "Set the size of the command history, \n\ |
| 2730 | ie. the number of previous commands to keep a record of.", &sethistlist); |
| 2731 | add_show_from_set (c, &showhistlist); |
| 2732 | c->function.sfunc = set_history_size_command; |
| 2733 | |
| 2734 | add_show_from_set |
| 2735 | (add_set_cmd ("filename", no_class, var_filename, (char *)&history_filename, |
| 2736 | "Set the filename in which to record the command history\n\ |
| 2737 | (the list of previous commands of which a record is kept).", &sethistlist), |
| 2738 | &showhistlist); |
| 2739 | |
| 2740 | add_show_from_set |
| 2741 | (add_set_cmd ("confirm", class_support, var_boolean, |
| 2742 | (char *)&caution, |
| 2743 | "Set whether to confirm potentially dangerous operations.", |
| 2744 | &setlist), |
| 2745 | &showlist); |
| 2746 | |
| 2747 | add_prefix_cmd ("info", class_info, info_command, |
| 2748 | "Generic command for showing things about the program being debugged.", |
| 2749 | &infolist, "info ", 0, &cmdlist); |
| 2750 | add_com_alias ("i", "info", class_info, 1); |
| 2751 | |
| 2752 | add_prefix_cmd ("show", class_info, show_command, |
| 2753 | "Generic command for showing things about the debugger.", |
| 2754 | &showlist, "show ", 0, &cmdlist); |
| 2755 | /* Another way to get at the same thing. */ |
| 2756 | add_info ("set", show_command, "Show all GDB settings."); |
| 2757 | |
| 2758 | add_cmd ("commands", no_class, show_commands, |
| 2759 | "Show the the history of commands you typed.\n\ |
| 2760 | You can supply a command number to start with, or a `+' to start after\n\ |
| 2761 | the previous command number shown.", |
| 2762 | &showlist); |
| 2763 | |
| 2764 | add_cmd ("version", no_class, show_version, |
| 2765 | "Show what version of GDB this is.", &showlist); |
| 2766 | } |