| 1 | /* Top level stuff for GDB, the GNU debugger. |
| 2 | Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995 |
| 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 "value.h" |
| 32 | #include "language.h" |
| 33 | #include "terminal.h" /* For job_control. */ |
| 34 | #include "annotate.h" |
| 35 | #include <setjmp.h> |
| 36 | #include "top.h" |
| 37 | |
| 38 | /* readline include files */ |
| 39 | #include "readline.h" |
| 40 | #include "history.h" |
| 41 | |
| 42 | /* readline defines this. */ |
| 43 | #undef savestring |
| 44 | |
| 45 | #include <sys/types.h> |
| 46 | #ifdef USG |
| 47 | /* What is this for? X_OK? */ |
| 48 | #include <unistd.h> |
| 49 | #endif |
| 50 | |
| 51 | #include <string.h> |
| 52 | #ifndef NO_SYS_FILE |
| 53 | #include <sys/file.h> |
| 54 | #endif |
| 55 | #include <sys/param.h> |
| 56 | #include <sys/stat.h> |
| 57 | #include <ctype.h> |
| 58 | |
| 59 | extern void initialize_targets PARAMS ((void)); |
| 60 | |
| 61 | extern void initialize_utils PARAMS ((void)); |
| 62 | |
| 63 | /* Prototypes for local functions */ |
| 64 | |
| 65 | static char * line_completion_function PARAMS ((char *, int, char *, int)); |
| 66 | |
| 67 | static char * readline_line_completion_function PARAMS ((char *, int)); |
| 68 | |
| 69 | static void command_loop_marker PARAMS ((int)); |
| 70 | |
| 71 | static void while_command PARAMS ((char *, int)); |
| 72 | |
| 73 | static void if_command PARAMS ((char *, int)); |
| 74 | |
| 75 | static struct command_line * |
| 76 | build_command_line PARAMS ((enum command_control_type, char *)); |
| 77 | |
| 78 | static struct command_line * |
| 79 | get_command_line PARAMS ((enum command_control_type, char *)); |
| 80 | |
| 81 | static void realloc_body_list PARAMS ((struct command_line *, int)); |
| 82 | |
| 83 | static enum misc_command_type read_next_line PARAMS ((struct command_line **)); |
| 84 | |
| 85 | static enum command_control_type |
| 86 | recurse_read_control_structure PARAMS ((struct command_line *)); |
| 87 | |
| 88 | static struct cleanup * setup_user_args PARAMS ((char *)); |
| 89 | |
| 90 | static char * locate_arg PARAMS ((char *)); |
| 91 | |
| 92 | static char * insert_args PARAMS ((char *)); |
| 93 | |
| 94 | static void arg_cleanup PARAMS ((void)); |
| 95 | |
| 96 | static void init_main PARAMS ((void)); |
| 97 | |
| 98 | static void init_cmd_lists PARAMS ((void)); |
| 99 | |
| 100 | static void float_handler PARAMS ((int)); |
| 101 | |
| 102 | static void init_signals PARAMS ((void)); |
| 103 | |
| 104 | static void set_verbose PARAMS ((char *, int, struct cmd_list_element *)); |
| 105 | |
| 106 | #ifdef TARGET_BYTE_ORDER_SELECTABLE |
| 107 | |
| 108 | static void set_endian PARAMS ((char *, int)); |
| 109 | |
| 110 | static void set_endian_big PARAMS ((char *, int)); |
| 111 | |
| 112 | static void set_endian_little PARAMS ((char *, int)); |
| 113 | |
| 114 | static void set_endian_auto PARAMS ((char *, int)); |
| 115 | |
| 116 | static void show_endian PARAMS ((char *, int)); |
| 117 | |
| 118 | #endif |
| 119 | |
| 120 | static void show_history PARAMS ((char *, int)); |
| 121 | |
| 122 | static void set_history PARAMS ((char *, int)); |
| 123 | |
| 124 | static void set_history_size_command PARAMS ((char *, int, |
| 125 | struct cmd_list_element *)); |
| 126 | |
| 127 | static void show_commands PARAMS ((char *, int)); |
| 128 | |
| 129 | static void echo_command PARAMS ((char *, int)); |
| 130 | |
| 131 | static void pwd_command PARAMS ((char *, int)); |
| 132 | |
| 133 | static void show_version PARAMS ((char *, int)); |
| 134 | |
| 135 | static void document_command PARAMS ((char *, int)); |
| 136 | |
| 137 | static void define_command PARAMS ((char *, int)); |
| 138 | |
| 139 | static void validate_comname PARAMS ((char *)); |
| 140 | |
| 141 | static void help_command PARAMS ((char *, int)); |
| 142 | |
| 143 | static void show_command PARAMS ((char *, int)); |
| 144 | |
| 145 | static void info_command PARAMS ((char *, int)); |
| 146 | |
| 147 | static void complete_command PARAMS ((char *, int)); |
| 148 | |
| 149 | static void do_nothing PARAMS ((int)); |
| 150 | |
| 151 | static int quit_cover PARAMS ((char *)); |
| 152 | |
| 153 | static void disconnect PARAMS ((int)); |
| 154 | |
| 155 | static void source_cleanup PARAMS ((FILE *)); |
| 156 | |
| 157 | /* If this definition isn't overridden by the header files, assume |
| 158 | that isatty and fileno exist on this system. */ |
| 159 | #ifndef ISATTY |
| 160 | #define ISATTY(FP) (isatty (fileno (FP))) |
| 161 | #endif |
| 162 | |
| 163 | /* Initialization file name for gdb. This is overridden in some configs. */ |
| 164 | |
| 165 | #ifndef GDBINIT_FILENAME |
| 166 | #define GDBINIT_FILENAME ".gdbinit" |
| 167 | #endif |
| 168 | char gdbinit[] = GDBINIT_FILENAME; |
| 169 | |
| 170 | int inhibit_gdbinit = 0; |
| 171 | |
| 172 | /* If nonzero, and GDB has been configured to be able to use windows, |
| 173 | attempt to open them upon startup. */ |
| 174 | |
| 175 | int use_windows = 1; |
| 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_name; |
| 184 | |
| 185 | /* Canonical target name as a string. */ |
| 186 | |
| 187 | extern char *target_name; |
| 188 | |
| 189 | extern char lang_frame_mismatch_warn[]; /* language.c */ |
| 190 | |
| 191 | /* Flag for whether we want all the "from_tty" gubbish printed. */ |
| 192 | |
| 193 | int caution = 1; /* Default is yes, sigh. */ |
| 194 | |
| 195 | /* Define all cmd_list_elements. */ |
| 196 | |
| 197 | /* Chain containing all defined commands. */ |
| 198 | |
| 199 | struct cmd_list_element *cmdlist; |
| 200 | |
| 201 | /* Chain containing all defined info subcommands. */ |
| 202 | |
| 203 | struct cmd_list_element *infolist; |
| 204 | |
| 205 | /* Chain containing all defined enable subcommands. */ |
| 206 | |
| 207 | struct cmd_list_element *enablelist; |
| 208 | |
| 209 | /* Chain containing all defined disable subcommands. */ |
| 210 | |
| 211 | struct cmd_list_element *disablelist; |
| 212 | |
| 213 | /* Chain containing all defined delete subcommands. */ |
| 214 | |
| 215 | struct cmd_list_element *deletelist; |
| 216 | |
| 217 | /* Chain containing all defined "enable breakpoint" subcommands. */ |
| 218 | |
| 219 | struct cmd_list_element *enablebreaklist; |
| 220 | |
| 221 | /* Chain containing all defined set subcommands */ |
| 222 | |
| 223 | struct cmd_list_element *setlist; |
| 224 | |
| 225 | /* Chain containing all defined unset subcommands */ |
| 226 | |
| 227 | struct cmd_list_element *unsetlist; |
| 228 | |
| 229 | /* Chain containing all defined show subcommands. */ |
| 230 | |
| 231 | struct cmd_list_element *showlist; |
| 232 | |
| 233 | #ifdef TARGET_BYTE_ORDER_SELECTABLE |
| 234 | /* Chain containing the \"set endian\" commands. */ |
| 235 | |
| 236 | struct cmd_list_element *endianlist; |
| 237 | #endif |
| 238 | |
| 239 | /* Chain containing all defined \"set history\". */ |
| 240 | |
| 241 | struct cmd_list_element *sethistlist; |
| 242 | |
| 243 | /* Chain containing all defined \"show history\". */ |
| 244 | |
| 245 | struct cmd_list_element *showhistlist; |
| 246 | |
| 247 | /* Chain containing all defined \"unset history\". */ |
| 248 | |
| 249 | struct cmd_list_element *unsethistlist; |
| 250 | |
| 251 | /* Chain containing all defined maintenance subcommands. */ |
| 252 | |
| 253 | #if MAINTENANCE_CMDS |
| 254 | struct cmd_list_element *maintenancelist; |
| 255 | #endif |
| 256 | |
| 257 | /* Chain containing all defined "maintenance info" subcommands. */ |
| 258 | |
| 259 | #if MAINTENANCE_CMDS |
| 260 | struct cmd_list_element *maintenanceinfolist; |
| 261 | #endif |
| 262 | |
| 263 | /* Chain containing all defined "maintenance print" subcommands. */ |
| 264 | |
| 265 | #if MAINTENANCE_CMDS |
| 266 | struct cmd_list_element *maintenanceprintlist; |
| 267 | #endif |
| 268 | |
| 269 | struct cmd_list_element *setprintlist; |
| 270 | |
| 271 | struct cmd_list_element *showprintlist; |
| 272 | |
| 273 | struct cmd_list_element *setchecklist; |
| 274 | |
| 275 | struct cmd_list_element *showchecklist; |
| 276 | |
| 277 | /* stdio stream that command input is being read from. Set to stdin normally. |
| 278 | Set by source_command to the file we are sourcing. Set to NULL if we are |
| 279 | executing a user-defined command. */ |
| 280 | |
| 281 | FILE *instream; |
| 282 | |
| 283 | /* Current working directory. */ |
| 284 | |
| 285 | char *current_directory; |
| 286 | |
| 287 | /* The directory name is actually stored here (usually). */ |
| 288 | char gdb_dirbuf[1024]; |
| 289 | |
| 290 | /* Function to call before reading a command, if nonzero. |
| 291 | The function receives two args: an input stream, |
| 292 | and a prompt string. */ |
| 293 | |
| 294 | void (*window_hook) PARAMS ((FILE *, char *)); |
| 295 | |
| 296 | int epoch_interface; |
| 297 | int xgdb_verbose; |
| 298 | |
| 299 | /* gdb prints this when reading a command interactively */ |
| 300 | static char *prompt; |
| 301 | |
| 302 | /* Buffer used for reading command lines, and the size |
| 303 | allocated for it so far. */ |
| 304 | |
| 305 | char *line; |
| 306 | int linesize = 100; |
| 307 | |
| 308 | /* Nonzero if the current command is modified by "server ". This |
| 309 | affects things like recording into the command history, comamnds |
| 310 | repeating on RETURN, etc. This is so a user interface (emacs, GUI, |
| 311 | whatever) can issue its own commands and also send along commands |
| 312 | from the user, and have the user not notice that the user interface |
| 313 | is issuing commands too. */ |
| 314 | int server_command; |
| 315 | |
| 316 | /* Baud rate specified for talking to serial target systems. Default |
| 317 | is left as -1, so targets can choose their own defaults. */ |
| 318 | /* FIXME: This means that "show remotebaud" and gr_files_info can print -1 |
| 319 | or (unsigned int)-1. This is a Bad User Interface. */ |
| 320 | |
| 321 | int baud_rate = -1; |
| 322 | |
| 323 | /* Non-zero tells remote* modules to output debugging info. */ |
| 324 | |
| 325 | int remote_debug = 0; |
| 326 | |
| 327 | /* Level of control structure. */ |
| 328 | static int control_level; |
| 329 | |
| 330 | /* Structure for arguments to user defined functions. */ |
| 331 | #define MAXUSERARGS 10 |
| 332 | struct user_args |
| 333 | { |
| 334 | struct user_args *next; |
| 335 | struct |
| 336 | { |
| 337 | char *arg; |
| 338 | int len; |
| 339 | } a[MAXUSERARGS]; |
| 340 | int count; |
| 341 | } *user_args; |
| 342 | |
| 343 | /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */ |
| 344 | |
| 345 | #ifndef STOP_SIGNAL |
| 346 | #ifdef SIGTSTP |
| 347 | #define STOP_SIGNAL SIGTSTP |
| 348 | static void stop_sig PARAMS ((int)); |
| 349 | #endif |
| 350 | #endif |
| 351 | |
| 352 | /* Some System V have job control but not sigsetmask(). */ |
| 353 | #if !defined (HAVE_SIGSETMASK) |
| 354 | #if !defined (USG) |
| 355 | #define HAVE_SIGSETMASK 1 |
| 356 | #else |
| 357 | #define HAVE_SIGSETMASK 0 |
| 358 | #endif |
| 359 | #endif |
| 360 | |
| 361 | #if 0 == (HAVE_SIGSETMASK) |
| 362 | #define sigsetmask(n) |
| 363 | #endif |
| 364 | |
| 365 | /* Hooks for alternate command interfaces. */ |
| 366 | |
| 367 | /* Called after most modules have been initialized, but before taking users |
| 368 | command file. */ |
| 369 | |
| 370 | void (*init_ui_hook) PARAMS ((void)); |
| 371 | |
| 372 | /* Called instead of command_loop at top level. Can be invoked via |
| 373 | return_to_top_level. */ |
| 374 | |
| 375 | void (*command_loop_hook) PARAMS ((void)); |
| 376 | |
| 377 | /* Called instead of fputs for all output. */ |
| 378 | |
| 379 | void (*fputs_unfiltered_hook) PARAMS ((const char *linebuffer, FILE *stream)); |
| 380 | |
| 381 | /* Called from print_frame_info to list the line we stopped in. */ |
| 382 | |
| 383 | void (*print_frame_info_listing_hook) PARAMS ((struct symtab *s, int line, |
| 384 | int stopline, int noerror)); |
| 385 | /* Replaces most of query. */ |
| 386 | |
| 387 | int (*query_hook) PARAMS (()); |
| 388 | |
| 389 | /* Called from gdb_flush to flush output. */ |
| 390 | |
| 391 | void (*flush_hook) PARAMS ((FILE *stream)); |
| 392 | |
| 393 | /* Called as appropriate to notify the interface of the specified breakpoint |
| 394 | conditions. */ |
| 395 | |
| 396 | void (*create_breakpoint_hook) PARAMS ((struct breakpoint *bpt)); |
| 397 | void (*delete_breakpoint_hook) PARAMS ((struct breakpoint *bpt)); |
| 398 | void (*modify_breakpoint_hook) PARAMS ((struct breakpoint *bpt)); |
| 399 | |
| 400 | /* Called during long calculations to allow GUI to repair window damage, and to |
| 401 | check for stop buttons, etc... */ |
| 402 | |
| 403 | void (*interactive_hook) PARAMS ((void)); |
| 404 | |
| 405 | /* Called when the registers have changed, as a hint to a GUI |
| 406 | to minimize window update. */ |
| 407 | |
| 408 | void (*registers_changed_hook) PARAMS ((void)); |
| 409 | |
| 410 | /* Called when going to wait for the target. Usually allows the GUI to run |
| 411 | while waiting for target events. */ |
| 412 | |
| 413 | int (*target_wait_hook) PARAMS ((int pid, struct target_waitstatus *status)); |
| 414 | |
| 415 | /* Used by UI as a wrapper around command execution. May do various things |
| 416 | like enabling/disabling buttons, etc... */ |
| 417 | |
| 418 | void (*call_command_hook) PARAMS ((struct cmd_list_element *c, char *cmd, |
| 419 | int from_tty)); |
| 420 | |
| 421 | |
| 422 | /* Takes control from error (). Typically used to prevent longjmps out of the |
| 423 | middle of the GUI. Usually used in conjunction with a catch routine. */ |
| 424 | |
| 425 | NORETURN void (*error_hook) PARAMS (()); |
| 426 | |
| 427 | \f |
| 428 | /* Where to go for return_to_top_level (RETURN_ERROR). */ |
| 429 | jmp_buf error_return; |
| 430 | /* Where to go for return_to_top_level (RETURN_QUIT). */ |
| 431 | jmp_buf quit_return; |
| 432 | |
| 433 | /* Return for reason REASON. This generally gets back to the command |
| 434 | loop, but can be caught via catch_errors. */ |
| 435 | |
| 436 | NORETURN void |
| 437 | return_to_top_level (reason) |
| 438 | enum return_reason reason; |
| 439 | { |
| 440 | quit_flag = 0; |
| 441 | immediate_quit = 0; |
| 442 | |
| 443 | /* Perhaps it would be cleaner to do this via the cleanup chain (not sure |
| 444 | I can think of a reason why that is vital, though). */ |
| 445 | bpstat_clear_actions(stop_bpstat); /* Clear queued breakpoint commands */ |
| 446 | |
| 447 | disable_current_display (); |
| 448 | do_cleanups (ALL_CLEANUPS); |
| 449 | |
| 450 | if (annotation_level > 1) |
| 451 | switch (reason) |
| 452 | { |
| 453 | case RETURN_QUIT: |
| 454 | annotate_quit (); |
| 455 | break; |
| 456 | case RETURN_ERROR: |
| 457 | annotate_error (); |
| 458 | break; |
| 459 | } |
| 460 | |
| 461 | (NORETURN void) longjmp |
| 462 | (reason == RETURN_ERROR ? error_return : quit_return, 1); |
| 463 | } |
| 464 | |
| 465 | /* Call FUNC with arg ARGS, catching any errors. If there is no |
| 466 | error, return the value returned by FUNC. If there is an error, |
| 467 | print ERRSTRING, print the specific error message, then return |
| 468 | zero. |
| 469 | |
| 470 | Must not be called with immediate_quit in effect (bad things might |
| 471 | happen, say we got a signal in the middle of a memcpy to quit_return). |
| 472 | This is an OK restriction; with very few exceptions immediate_quit can |
| 473 | be replaced by judicious use of QUIT. |
| 474 | |
| 475 | MASK specifies what to catch; it is normally set to |
| 476 | RETURN_MASK_ALL, if for no other reason than that the code which |
| 477 | calls catch_errors might not be set up to deal with a quit which |
| 478 | isn't caught. But if the code can deal with it, it generally |
| 479 | should be RETURN_MASK_ERROR, unless for some reason it is more |
| 480 | useful to abort only the portion of the operation inside the |
| 481 | catch_errors. Note that quit should return to the command line |
| 482 | fairly quickly, even if some further processing is being done. */ |
| 483 | |
| 484 | int |
| 485 | catch_errors (func, args, errstring, mask) |
| 486 | int (*func) PARAMS ((char *)); |
| 487 | PTR args; |
| 488 | char *errstring; |
| 489 | return_mask mask; |
| 490 | { |
| 491 | jmp_buf saved_error; |
| 492 | jmp_buf saved_quit; |
| 493 | jmp_buf tmp_jmp; |
| 494 | int val; |
| 495 | struct cleanup *saved_cleanup_chain; |
| 496 | char *saved_error_pre_print; |
| 497 | char *saved_quit_pre_print; |
| 498 | |
| 499 | saved_cleanup_chain = save_cleanups (); |
| 500 | saved_error_pre_print = error_pre_print; |
| 501 | saved_quit_pre_print = quit_pre_print; |
| 502 | |
| 503 | if (mask & RETURN_MASK_ERROR) |
| 504 | { |
| 505 | memcpy ((char *)saved_error, (char *)error_return, sizeof (jmp_buf)); |
| 506 | error_pre_print = errstring; |
| 507 | } |
| 508 | if (mask & RETURN_MASK_QUIT) |
| 509 | { |
| 510 | memcpy (saved_quit, quit_return, sizeof (jmp_buf)); |
| 511 | quit_pre_print = errstring; |
| 512 | } |
| 513 | |
| 514 | if (setjmp (tmp_jmp) == 0) |
| 515 | { |
| 516 | if (mask & RETURN_MASK_ERROR) |
| 517 | memcpy (error_return, tmp_jmp, sizeof (jmp_buf)); |
| 518 | if (mask & RETURN_MASK_QUIT) |
| 519 | memcpy (quit_return, tmp_jmp, sizeof (jmp_buf)); |
| 520 | val = (*func) (args); |
| 521 | } |
| 522 | else |
| 523 | val = 0; |
| 524 | |
| 525 | restore_cleanups (saved_cleanup_chain); |
| 526 | |
| 527 | if (mask & RETURN_MASK_ERROR) |
| 528 | { |
| 529 | memcpy (error_return, saved_error, sizeof (jmp_buf)); |
| 530 | error_pre_print = saved_error_pre_print; |
| 531 | } |
| 532 | if (mask & RETURN_MASK_QUIT) |
| 533 | { |
| 534 | memcpy (quit_return, saved_quit, sizeof (jmp_buf)); |
| 535 | quit_pre_print = saved_quit_pre_print; |
| 536 | } |
| 537 | return val; |
| 538 | } |
| 539 | |
| 540 | /* Handler for SIGHUP. */ |
| 541 | |
| 542 | static void |
| 543 | disconnect (signo) |
| 544 | int signo; |
| 545 | { |
| 546 | catch_errors (quit_cover, NULL, |
| 547 | "Could not kill the program being debugged", RETURN_MASK_ALL); |
| 548 | signal (SIGHUP, SIG_DFL); |
| 549 | kill (getpid (), SIGHUP); |
| 550 | } |
| 551 | |
| 552 | /* Just a little helper function for disconnect(). */ |
| 553 | |
| 554 | static int |
| 555 | quit_cover (s) |
| 556 | char *s; |
| 557 | { |
| 558 | caution = 0; /* Throw caution to the wind -- we're exiting. |
| 559 | This prevents asking the user dumb questions. */ |
| 560 | quit_command((char *)0, 0); |
| 561 | return 0; |
| 562 | } |
| 563 | \f |
| 564 | /* Line number we are currently in in a file which is being sourced. */ |
| 565 | static int source_line_number; |
| 566 | |
| 567 | /* Name of the file we are sourcing. */ |
| 568 | static char *source_file_name; |
| 569 | |
| 570 | /* Buffer containing the error_pre_print used by the source stuff. |
| 571 | Malloc'd. */ |
| 572 | static char *source_error; |
| 573 | static int source_error_allocated; |
| 574 | |
| 575 | /* Something to glom on to the start of error_pre_print if source_file_name |
| 576 | is set. */ |
| 577 | static char *source_pre_error; |
| 578 | |
| 579 | /* Clean up on error during a "source" command (or execution of a |
| 580 | user-defined command). */ |
| 581 | |
| 582 | static void |
| 583 | source_cleanup (stream) |
| 584 | FILE *stream; |
| 585 | { |
| 586 | /* Restore the previous input stream. */ |
| 587 | instream = stream; |
| 588 | } |
| 589 | |
| 590 | /* Read commands from STREAM. */ |
| 591 | void |
| 592 | read_command_file (stream) |
| 593 | FILE *stream; |
| 594 | { |
| 595 | struct cleanup *cleanups; |
| 596 | |
| 597 | cleanups = make_cleanup (source_cleanup, instream); |
| 598 | instream = stream; |
| 599 | command_loop (); |
| 600 | do_cleanups (cleanups); |
| 601 | } |
| 602 | \f |
| 603 | extern void init_proc (); |
| 604 | |
| 605 | void (*pre_init_ui_hook) PARAMS ((void)); |
| 606 | |
| 607 | void |
| 608 | gdb_init () |
| 609 | { |
| 610 | if (pre_init_ui_hook) |
| 611 | pre_init_ui_hook (); |
| 612 | |
| 613 | /* Run the init function of each source file */ |
| 614 | |
| 615 | getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)); |
| 616 | current_directory = gdb_dirbuf; |
| 617 | |
| 618 | init_cmd_lists (); /* This needs to be done first */ |
| 619 | initialize_targets (); /* Setup target_terminal macros for utils.c */ |
| 620 | initialize_utils (); /* Make errors and warnings possible */ |
| 621 | initialize_all_files (); |
| 622 | init_main (); /* But that omits this file! Do it now */ |
| 623 | init_signals (); |
| 624 | |
| 625 | init_proc (); |
| 626 | |
| 627 | /* We need a default language for parsing expressions, so simple things like |
| 628 | "set width 0" won't fail if no language is explicitly set in a config file |
| 629 | or implicitly set by reading an executable during startup. */ |
| 630 | set_language (language_c); |
| 631 | expected_language = current_language; /* don't warn about the change. */ |
| 632 | |
| 633 | if (init_ui_hook) |
| 634 | init_ui_hook (); |
| 635 | } |
| 636 | |
| 637 | /* Allocate, initialize a new command line structure for one of the |
| 638 | control commands (if/while). */ |
| 639 | |
| 640 | static struct command_line * |
| 641 | build_command_line (type, args) |
| 642 | enum command_control_type type; |
| 643 | char *args; |
| 644 | { |
| 645 | struct command_line *cmd; |
| 646 | |
| 647 | cmd = (struct command_line *)xmalloc (sizeof (struct command_line)); |
| 648 | cmd->next = NULL; |
| 649 | cmd->control_type = type; |
| 650 | |
| 651 | cmd->body_count = 1; |
| 652 | cmd->body_list |
| 653 | = (struct command_line **)xmalloc (sizeof (struct command_line *) |
| 654 | * cmd->body_count); |
| 655 | memset (cmd->body_list, 0, sizeof (struct command_line *) * cmd->body_count); |
| 656 | cmd->line = savestring (args, strlen (args)); |
| 657 | return cmd; |
| 658 | } |
| 659 | |
| 660 | /* Build and return a new command structure for the control commands |
| 661 | such as "if" and "while". */ |
| 662 | |
| 663 | static struct command_line * |
| 664 | get_command_line (type, arg) |
| 665 | enum command_control_type type; |
| 666 | char *arg; |
| 667 | { |
| 668 | struct command_line *cmd; |
| 669 | struct cleanup *old_chain = NULL; |
| 670 | |
| 671 | /* Allocate and build a new command line structure. */ |
| 672 | cmd = build_command_line (type, arg); |
| 673 | |
| 674 | old_chain = make_cleanup (free_command_lines, &cmd); |
| 675 | |
| 676 | /* Read in the body of this command. */ |
| 677 | if (recurse_read_control_structure (cmd) == invalid_control) |
| 678 | { |
| 679 | warning ("error reading in control structure\n"); |
| 680 | do_cleanups (old_chain); |
| 681 | return NULL; |
| 682 | } |
| 683 | |
| 684 | discard_cleanups (old_chain); |
| 685 | return cmd; |
| 686 | } |
| 687 | |
| 688 | /* Recursively print a command (including full control structures). */ |
| 689 | void |
| 690 | print_command_line (cmd, depth) |
| 691 | struct command_line *cmd; |
| 692 | unsigned int depth; |
| 693 | { |
| 694 | unsigned int i; |
| 695 | |
| 696 | if (depth) |
| 697 | { |
| 698 | for (i = 0; i < depth; i++) |
| 699 | fputs_filtered (" ", gdb_stdout); |
| 700 | } |
| 701 | |
| 702 | /* A simple command, print it and return. */ |
| 703 | if (cmd->control_type == simple_control) |
| 704 | { |
| 705 | fputs_filtered (cmd->line, gdb_stdout); |
| 706 | fputs_filtered ("\n", gdb_stdout); |
| 707 | return; |
| 708 | } |
| 709 | |
| 710 | /* loop_continue to jump to the start of a while loop, print it |
| 711 | and return. */ |
| 712 | if (cmd->control_type == continue_control) |
| 713 | { |
| 714 | fputs_filtered ("loop_continue\n", gdb_stdout); |
| 715 | return; |
| 716 | } |
| 717 | |
| 718 | /* loop_break to break out of a while loop, print it and return. */ |
| 719 | if (cmd->control_type == break_control) |
| 720 | { |
| 721 | fputs_filtered ("loop_break\n", gdb_stdout); |
| 722 | return; |
| 723 | } |
| 724 | |
| 725 | /* A while command. Recursively print its subcommands before returning. */ |
| 726 | if (cmd->control_type == while_control) |
| 727 | { |
| 728 | struct command_line *list; |
| 729 | fputs_filtered ("while ", gdb_stdout); |
| 730 | fputs_filtered (cmd->line, gdb_stdout); |
| 731 | fputs_filtered ("\n", gdb_stdout); |
| 732 | list = *cmd->body_list; |
| 733 | while (list) |
| 734 | { |
| 735 | print_command_line (list, depth + 1); |
| 736 | list = list->next; |
| 737 | } |
| 738 | } |
| 739 | |
| 740 | /* An if command. Recursively print both arms before returning. */ |
| 741 | if (cmd->control_type == if_control) |
| 742 | { |
| 743 | fputs_filtered ("if ", gdb_stdout); |
| 744 | fputs_filtered (cmd->line, gdb_stdout); |
| 745 | fputs_filtered ("\n", gdb_stdout); |
| 746 | /* The true arm. */ |
| 747 | print_command_line (cmd->body_list[0], depth + 1); |
| 748 | |
| 749 | /* Show the false arm if it exists. */ |
| 750 | if (cmd->body_count == 2) |
| 751 | { |
| 752 | if (depth) |
| 753 | { |
| 754 | for (i = 0; i < depth; i++) |
| 755 | fputs_filtered (" ", gdb_stdout); |
| 756 | } |
| 757 | fputs_filtered ("else\n", gdb_stdout); |
| 758 | print_command_line (cmd->body_list[1], depth + 1); |
| 759 | } |
| 760 | if (depth) |
| 761 | { |
| 762 | for (i = 0; i < depth; i++) |
| 763 | fputs_filtered (" ", gdb_stdout); |
| 764 | } |
| 765 | fputs_filtered ("end\n", gdb_stdout); |
| 766 | } |
| 767 | } |
| 768 | |
| 769 | /* Execute the command in CMD. */ |
| 770 | |
| 771 | enum command_control_type |
| 772 | execute_control_command (cmd) |
| 773 | struct command_line *cmd; |
| 774 | { |
| 775 | struct expression *expr; |
| 776 | struct command_line *current; |
| 777 | struct cleanup *old_chain = 0; |
| 778 | value_ptr val; |
| 779 | int loop; |
| 780 | enum command_control_type ret; |
| 781 | char *new_line; |
| 782 | |
| 783 | switch (cmd->control_type) |
| 784 | { |
| 785 | case simple_control: |
| 786 | /* A simple command, execute it and return. */ |
| 787 | new_line = insert_args (cmd->line); |
| 788 | if (!new_line) |
| 789 | return invalid_control; |
| 790 | old_chain = make_cleanup (free_current_contents, &new_line); |
| 791 | execute_command (new_line, 0); |
| 792 | ret = cmd->control_type; |
| 793 | break; |
| 794 | |
| 795 | case continue_control: |
| 796 | case break_control: |
| 797 | /* Return for "continue", and "break" so we can either |
| 798 | continue the loop at the top, or break out. */ |
| 799 | ret = cmd->control_type; |
| 800 | break; |
| 801 | |
| 802 | case while_control: |
| 803 | { |
| 804 | /* Parse the loop control expression for the while statement. */ |
| 805 | new_line = insert_args (cmd->line); |
| 806 | if (!new_line) |
| 807 | return invalid_control; |
| 808 | old_chain = make_cleanup (free_current_contents, &new_line); |
| 809 | expr = parse_expression (new_line); |
| 810 | make_cleanup (free_current_contents, &expr); |
| 811 | |
| 812 | ret = simple_control; |
| 813 | loop = true; |
| 814 | |
| 815 | /* Keep iterating so long as the expression is true. */ |
| 816 | while (loop == true) |
| 817 | { |
| 818 | /* Evaluate the expression. */ |
| 819 | val = evaluate_expression (expr); |
| 820 | |
| 821 | /* If the value is false, then break out of the loop. */ |
| 822 | if (!value_true (val)) |
| 823 | break; |
| 824 | |
| 825 | /* Execute the body of the while statement. */ |
| 826 | current = *cmd->body_list; |
| 827 | while (current) |
| 828 | { |
| 829 | ret = execute_control_command (current); |
| 830 | |
| 831 | /* If we got an error, or a "break" command, then stop |
| 832 | looping. */ |
| 833 | if (ret == invalid_control || ret == break_control) |
| 834 | { |
| 835 | loop = false; |
| 836 | break; |
| 837 | } |
| 838 | |
| 839 | /* If we got a "continue" command, then restart the loop |
| 840 | at this point. */ |
| 841 | if (ret == continue_control) |
| 842 | break; |
| 843 | |
| 844 | /* Get the next statement. */ |
| 845 | current = current->next; |
| 846 | } |
| 847 | } |
| 848 | |
| 849 | /* Reset RET so that we don't recurse the break all the way down. */ |
| 850 | if (ret == break_control) |
| 851 | ret = simple_control; |
| 852 | |
| 853 | break; |
| 854 | } |
| 855 | |
| 856 | case if_control: |
| 857 | { |
| 858 | new_line = insert_args (cmd->line); |
| 859 | if (!new_line) |
| 860 | return invalid_control; |
| 861 | old_chain = make_cleanup (free_current_contents, &new_line); |
| 862 | /* Parse the conditional for the if statement. */ |
| 863 | expr = parse_expression (new_line); |
| 864 | make_cleanup (free_current_contents, &expr); |
| 865 | |
| 866 | current = NULL; |
| 867 | ret = simple_control; |
| 868 | |
| 869 | /* Evaluate the conditional. */ |
| 870 | val = evaluate_expression (expr); |
| 871 | |
| 872 | /* Choose which arm to take commands from based on the value of the |
| 873 | conditional expression. */ |
| 874 | if (value_true (val)) |
| 875 | current = *cmd->body_list; |
| 876 | else if (cmd->body_count == 2) |
| 877 | current = *(cmd->body_list + 1); |
| 878 | |
| 879 | /* Execute commands in the given arm. */ |
| 880 | while (current) |
| 881 | { |
| 882 | ret = execute_control_command (current); |
| 883 | |
| 884 | /* If we got an error, get out. */ |
| 885 | if (ret != simple_control) |
| 886 | break; |
| 887 | |
| 888 | /* Get the next statement in the body. */ |
| 889 | current = current->next; |
| 890 | } |
| 891 | |
| 892 | break; |
| 893 | } |
| 894 | |
| 895 | default: |
| 896 | warning ("Invalid control type in command structure."); |
| 897 | return invalid_control; |
| 898 | } |
| 899 | |
| 900 | if (old_chain) |
| 901 | do_cleanups (old_chain); |
| 902 | |
| 903 | return ret; |
| 904 | } |
| 905 | |
| 906 | /* "while" command support. Executes a body of statements while the |
| 907 | loop condition is nonzero. */ |
| 908 | |
| 909 | static void |
| 910 | while_command (arg, from_tty) |
| 911 | char *arg; |
| 912 | int from_tty; |
| 913 | { |
| 914 | struct command_line *command = NULL; |
| 915 | |
| 916 | control_level = 1; |
| 917 | command = get_command_line (while_control, arg); |
| 918 | |
| 919 | if (command == NULL) |
| 920 | return; |
| 921 | |
| 922 | execute_control_command (command); |
| 923 | free_command_lines (&command); |
| 924 | } |
| 925 | |
| 926 | /* "if" command support. Execute either the true or false arm depending |
| 927 | on the value of the if conditional. */ |
| 928 | |
| 929 | static void |
| 930 | if_command (arg, from_tty) |
| 931 | char *arg; |
| 932 | int from_tty; |
| 933 | { |
| 934 | struct command_line *command = NULL; |
| 935 | |
| 936 | control_level = 1; |
| 937 | command = get_command_line (if_control, arg); |
| 938 | |
| 939 | if (command == NULL) |
| 940 | return; |
| 941 | |
| 942 | execute_control_command (command); |
| 943 | free_command_lines (&command); |
| 944 | } |
| 945 | |
| 946 | /* Cleanup */ |
| 947 | static void |
| 948 | arg_cleanup () |
| 949 | { |
| 950 | struct user_args *oargs = user_args; |
| 951 | if (!user_args) |
| 952 | fatal ("Internal error, arg_cleanup called with no user args.\n"); |
| 953 | |
| 954 | user_args = user_args->next; |
| 955 | free (oargs); |
| 956 | } |
| 957 | |
| 958 | /* Bind the incomming arguments for a user defined command to |
| 959 | $arg0, $arg1 ... $argMAXUSERARGS. */ |
| 960 | |
| 961 | static struct cleanup * |
| 962 | setup_user_args (p) |
| 963 | char *p; |
| 964 | { |
| 965 | struct user_args *args; |
| 966 | struct cleanup *old_chain; |
| 967 | unsigned int arg_count = 0; |
| 968 | |
| 969 | args = (struct user_args *)xmalloc (sizeof (struct user_args)); |
| 970 | memset (args, 0, sizeof (struct user_args)); |
| 971 | |
| 972 | args->next = user_args; |
| 973 | user_args = args; |
| 974 | |
| 975 | old_chain = make_cleanup (arg_cleanup, 0); |
| 976 | |
| 977 | if (p == NULL) |
| 978 | return old_chain; |
| 979 | |
| 980 | while (*p) |
| 981 | { |
| 982 | char *start_arg; |
| 983 | |
| 984 | if (arg_count >= MAXUSERARGS) |
| 985 | { |
| 986 | error ("user defined function may only have %d arguments.\n", |
| 987 | MAXUSERARGS); |
| 988 | return old_chain; |
| 989 | } |
| 990 | |
| 991 | /* Strip whitespace. */ |
| 992 | while (*p == ' ' || *p == '\t') |
| 993 | p++; |
| 994 | |
| 995 | /* P now points to an argument. */ |
| 996 | start_arg = p; |
| 997 | user_args->a[arg_count].arg = p; |
| 998 | |
| 999 | /* Get to the end of this argument. */ |
| 1000 | while (*p && *p != ' ' && *p != '\t') |
| 1001 | p++; |
| 1002 | |
| 1003 | user_args->a[arg_count].len = p - start_arg; |
| 1004 | arg_count++; |
| 1005 | user_args->count++; |
| 1006 | } |
| 1007 | return old_chain; |
| 1008 | } |
| 1009 | |
| 1010 | /* Given character string P, return a point to the first argument ($arg), |
| 1011 | or NULL if P contains no arguments. */ |
| 1012 | |
| 1013 | static char * |
| 1014 | locate_arg (p) |
| 1015 | char *p; |
| 1016 | { |
| 1017 | while ((p = strchr (p, '$'))) |
| 1018 | { |
| 1019 | if (strncmp (p, "$arg", 4) == 0 && isdigit (p[4])) |
| 1020 | return p; |
| 1021 | p++; |
| 1022 | } |
| 1023 | return NULL; |
| 1024 | } |
| 1025 | |
| 1026 | /* Insert the user defined arguments stored in user_arg into the $arg |
| 1027 | arguments found in line, with the updated copy being placed into nline. */ |
| 1028 | |
| 1029 | static char * |
| 1030 | insert_args (line) |
| 1031 | char *line; |
| 1032 | { |
| 1033 | char *p, *save_line, *new_line; |
| 1034 | unsigned len, i; |
| 1035 | |
| 1036 | /* First we need to know how much memory to allocate for the new line. */ |
| 1037 | save_line = line; |
| 1038 | len = 0; |
| 1039 | while ((p = locate_arg (line))) |
| 1040 | { |
| 1041 | len += p - line; |
| 1042 | i = p[4] - '0'; |
| 1043 | |
| 1044 | if (i >= user_args->count) |
| 1045 | { |
| 1046 | error ("Missing argument %d in user function.\n", i); |
| 1047 | return NULL; |
| 1048 | } |
| 1049 | len += user_args->a[i].len; |
| 1050 | line = p + 5; |
| 1051 | } |
| 1052 | |
| 1053 | /* Don't forget the tail. */ |
| 1054 | len += strlen (line); |
| 1055 | |
| 1056 | /* Allocate space for the new line and fill it in. */ |
| 1057 | new_line = (char *)xmalloc (len + 1); |
| 1058 | if (new_line == NULL) |
| 1059 | return NULL; |
| 1060 | |
| 1061 | /* Restore pointer to beginning of old line. */ |
| 1062 | line = save_line; |
| 1063 | |
| 1064 | /* Save pointer to beginning of new line. */ |
| 1065 | save_line = new_line; |
| 1066 | |
| 1067 | while ((p = locate_arg (line))) |
| 1068 | { |
| 1069 | int i, len; |
| 1070 | |
| 1071 | memcpy (new_line, line, p - line); |
| 1072 | new_line += p - line; |
| 1073 | i = p[4] - '0'; |
| 1074 | |
| 1075 | len = user_args->a[i].len; |
| 1076 | if (len) |
| 1077 | { |
| 1078 | memcpy (new_line, user_args->a[i].arg, len); |
| 1079 | new_line += len; |
| 1080 | } |
| 1081 | line = p + 5; |
| 1082 | } |
| 1083 | /* Don't forget the tail. */ |
| 1084 | strcpy (new_line, line); |
| 1085 | |
| 1086 | /* Return a pointer to the beginning of the new line. */ |
| 1087 | return save_line; |
| 1088 | } |
| 1089 | |
| 1090 | void |
| 1091 | execute_user_command (c, args) |
| 1092 | struct cmd_list_element *c; |
| 1093 | char *args; |
| 1094 | { |
| 1095 | register struct command_line *cmdlines; |
| 1096 | struct cleanup *old_chain; |
| 1097 | enum command_control_type ret; |
| 1098 | |
| 1099 | old_chain = setup_user_args (args); |
| 1100 | |
| 1101 | cmdlines = c->user_commands; |
| 1102 | if (cmdlines == 0) |
| 1103 | /* Null command */ |
| 1104 | return; |
| 1105 | |
| 1106 | /* Set the instream to 0, indicating execution of a |
| 1107 | user-defined function. */ |
| 1108 | old_chain = make_cleanup (source_cleanup, instream); |
| 1109 | instream = (FILE *) 0; |
| 1110 | while (cmdlines) |
| 1111 | { |
| 1112 | ret = execute_control_command (cmdlines); |
| 1113 | if (ret != simple_control && ret != break_control) |
| 1114 | { |
| 1115 | warning ("Error in control structure.\n"); |
| 1116 | break; |
| 1117 | } |
| 1118 | cmdlines = cmdlines->next; |
| 1119 | } |
| 1120 | do_cleanups (old_chain); |
| 1121 | } |
| 1122 | |
| 1123 | /* Execute the line P as a command. |
| 1124 | Pass FROM_TTY as second argument to the defining function. */ |
| 1125 | |
| 1126 | void |
| 1127 | execute_command (p, from_tty) |
| 1128 | char *p; |
| 1129 | int from_tty; |
| 1130 | { |
| 1131 | register struct cmd_list_element *c; |
| 1132 | register enum language flang; |
| 1133 | static int warned = 0; |
| 1134 | |
| 1135 | free_all_values (); |
| 1136 | |
| 1137 | /* This can happen when command_line_input hits end of file. */ |
| 1138 | if (p == NULL) |
| 1139 | return; |
| 1140 | |
| 1141 | while (*p == ' ' || *p == '\t') p++; |
| 1142 | if (*p) |
| 1143 | { |
| 1144 | char *arg; |
| 1145 | |
| 1146 | c = lookup_cmd (&p, cmdlist, "", 0, 1); |
| 1147 | /* Pass null arg rather than an empty one. */ |
| 1148 | arg = *p ? p : 0; |
| 1149 | |
| 1150 | /* If this command has been hooked, run the hook first. */ |
| 1151 | if (c->hook) |
| 1152 | execute_user_command (c->hook, (char *)0); |
| 1153 | |
| 1154 | if (c->class == class_user) |
| 1155 | execute_user_command (c, arg); |
| 1156 | else if (c->type == set_cmd || c->type == show_cmd) |
| 1157 | do_setshow_command (arg, from_tty & caution, c); |
| 1158 | else if (c->function.cfunc == NO_FUNCTION) |
| 1159 | error ("That is not a command, just a help topic."); |
| 1160 | else if (call_command_hook) |
| 1161 | call_command_hook (c, arg, from_tty & caution); |
| 1162 | else |
| 1163 | (*c->function.cfunc) (arg, from_tty & caution); |
| 1164 | } |
| 1165 | |
| 1166 | /* Tell the user if the language has changed (except first time). */ |
| 1167 | if (current_language != expected_language) |
| 1168 | { |
| 1169 | if (language_mode == language_mode_auto) { |
| 1170 | language_info (1); /* Print what changed. */ |
| 1171 | } |
| 1172 | warned = 0; |
| 1173 | } |
| 1174 | |
| 1175 | /* Warn the user if the working language does not match the |
| 1176 | language of the current frame. Only warn the user if we are |
| 1177 | actually running the program, i.e. there is a stack. */ |
| 1178 | /* FIXME: This should be cacheing the frame and only running when |
| 1179 | the frame changes. */ |
| 1180 | |
| 1181 | if (target_has_stack) |
| 1182 | { |
| 1183 | flang = get_frame_language (); |
| 1184 | if (!warned |
| 1185 | && flang != language_unknown |
| 1186 | && flang != current_language->la_language) |
| 1187 | { |
| 1188 | printf_filtered ("%s\n", lang_frame_mismatch_warn); |
| 1189 | warned = 1; |
| 1190 | } |
| 1191 | } |
| 1192 | } |
| 1193 | |
| 1194 | /* ARGSUSED */ |
| 1195 | static void |
| 1196 | command_loop_marker (foo) |
| 1197 | int foo; |
| 1198 | { |
| 1199 | } |
| 1200 | |
| 1201 | /* Read commands from `instream' and execute them |
| 1202 | until end of file or error reading instream. */ |
| 1203 | |
| 1204 | void |
| 1205 | command_loop () |
| 1206 | { |
| 1207 | struct cleanup *old_chain; |
| 1208 | char *command; |
| 1209 | int stdin_is_tty = ISATTY (stdin); |
| 1210 | long time_at_cmd_start; |
| 1211 | long space_at_cmd_start; |
| 1212 | extern int display_time; |
| 1213 | extern int display_space; |
| 1214 | |
| 1215 | while (!feof (instream)) |
| 1216 | { |
| 1217 | if (window_hook && instream == stdin) |
| 1218 | (*window_hook) (instream, prompt); |
| 1219 | |
| 1220 | quit_flag = 0; |
| 1221 | if (instream == stdin && stdin_is_tty) |
| 1222 | reinitialize_more_filter (); |
| 1223 | old_chain = make_cleanup (command_loop_marker, 0); |
| 1224 | command = command_line_input (instream == stdin ? prompt : (char *) NULL, |
| 1225 | instream == stdin, "prompt"); |
| 1226 | if (command == 0) |
| 1227 | return; |
| 1228 | |
| 1229 | time_at_cmd_start = get_run_time (); |
| 1230 | |
| 1231 | if (display_space) |
| 1232 | { |
| 1233 | extern char **environ; |
| 1234 | char *lim = (char *) sbrk (0); |
| 1235 | |
| 1236 | space_at_cmd_start = (long) (lim - (char *) &environ); |
| 1237 | } |
| 1238 | |
| 1239 | execute_command (command, instream == stdin); |
| 1240 | /* Do any commands attached to breakpoint we stopped at. */ |
| 1241 | bpstat_do_actions (&stop_bpstat); |
| 1242 | do_cleanups (old_chain); |
| 1243 | |
| 1244 | if (display_time) |
| 1245 | { |
| 1246 | long cmd_time = get_run_time () - time_at_cmd_start; |
| 1247 | |
| 1248 | printf_unfiltered ("Command execution time: %ld.%06ld\n", |
| 1249 | cmd_time / 1000000, cmd_time % 1000000); |
| 1250 | } |
| 1251 | |
| 1252 | if (display_space) |
| 1253 | { |
| 1254 | extern char **environ; |
| 1255 | char *lim = (char *) sbrk (0); |
| 1256 | long space_now = lim - (char *) &environ; |
| 1257 | long space_diff = space_now - space_at_cmd_start; |
| 1258 | |
| 1259 | printf_unfiltered ("Space used: %ld (%c%ld for this command)\n", |
| 1260 | space_now, |
| 1261 | (space_diff >= 0 ? '+' : '-'), |
| 1262 | space_diff); |
| 1263 | } |
| 1264 | } |
| 1265 | } |
| 1266 | \f |
| 1267 | /* Commands call this if they do not want to be repeated by null lines. */ |
| 1268 | |
| 1269 | void |
| 1270 | dont_repeat () |
| 1271 | { |
| 1272 | if (server_command) |
| 1273 | return; |
| 1274 | |
| 1275 | /* If we aren't reading from standard input, we are saving the last |
| 1276 | thing read from stdin in line and don't want to delete it. Null lines |
| 1277 | won't repeat here in any case. */ |
| 1278 | if (instream == stdin) |
| 1279 | *line = 0; |
| 1280 | } |
| 1281 | \f |
| 1282 | /* Read a line from the stream "instream" without command line editing. |
| 1283 | |
| 1284 | It prints PRROMPT once at the start. |
| 1285 | Action is compatible with "readline", e.g. space for the result is |
| 1286 | malloc'd and should be freed by the caller. |
| 1287 | |
| 1288 | A NULL return means end of file. */ |
| 1289 | char * |
| 1290 | gdb_readline (prrompt) |
| 1291 | char *prrompt; |
| 1292 | { |
| 1293 | int c; |
| 1294 | char *result; |
| 1295 | int input_index = 0; |
| 1296 | int result_size = 80; |
| 1297 | |
| 1298 | if (prrompt) |
| 1299 | { |
| 1300 | /* Don't use a _filtered function here. It causes the assumed |
| 1301 | character position to be off, since the newline we read from |
| 1302 | the user is not accounted for. */ |
| 1303 | fputs_unfiltered (prrompt, gdb_stdout); |
| 1304 | #ifdef MPW |
| 1305 | /* Move to a new line so the entered line doesn't have a prompt |
| 1306 | on the front of it. */ |
| 1307 | fputs_unfiltered ("\n", gdb_stdout); |
| 1308 | #endif /* MPW */ |
| 1309 | gdb_flush (gdb_stdout); |
| 1310 | } |
| 1311 | |
| 1312 | result = (char *) xmalloc (result_size); |
| 1313 | |
| 1314 | while (1) |
| 1315 | { |
| 1316 | /* Read from stdin if we are executing a user defined command. |
| 1317 | This is the right thing for prompt_for_continue, at least. */ |
| 1318 | c = fgetc (instream ? instream : stdin); |
| 1319 | |
| 1320 | if (c == EOF) |
| 1321 | { |
| 1322 | if (input_index > 0) |
| 1323 | /* The last line does not end with a newline. Return it, and |
| 1324 | if we are called again fgetc will still return EOF and |
| 1325 | we'll return NULL then. */ |
| 1326 | break; |
| 1327 | free (result); |
| 1328 | return NULL; |
| 1329 | } |
| 1330 | |
| 1331 | if (c == '\n') |
| 1332 | break; |
| 1333 | |
| 1334 | result[input_index++] = c; |
| 1335 | while (input_index >= result_size) |
| 1336 | { |
| 1337 | result_size *= 2; |
| 1338 | result = (char *) xrealloc (result, result_size); |
| 1339 | } |
| 1340 | } |
| 1341 | |
| 1342 | result[input_index++] = '\0'; |
| 1343 | return result; |
| 1344 | } |
| 1345 | |
| 1346 | /* Variables which control command line editing and history |
| 1347 | substitution. These variables are given default values at the end |
| 1348 | of this file. */ |
| 1349 | static int command_editing_p; |
| 1350 | static int history_expansion_p; |
| 1351 | static int write_history_p; |
| 1352 | static int history_size; |
| 1353 | static char *history_filename; |
| 1354 | |
| 1355 | /* readline uses the word breaks for two things: |
| 1356 | (1) In figuring out where to point the TEXT parameter to the |
| 1357 | rl_completion_entry_function. Since we don't use TEXT for much, |
| 1358 | it doesn't matter a lot what the word breaks are for this purpose, but |
| 1359 | it does affect how much stuff M-? lists. |
| 1360 | (2) If one of the matches contains a word break character, readline |
| 1361 | will quote it. That's why we switch between |
| 1362 | gdb_completer_word_break_characters and |
| 1363 | gdb_completer_command_word_break_characters. I'm not sure when |
| 1364 | we need this behavior (perhaps for funky characters in C++ symbols?). */ |
| 1365 | |
| 1366 | /* Variables which are necessary for fancy command line editing. */ |
| 1367 | char *gdb_completer_word_break_characters = |
| 1368 | " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-"; |
| 1369 | |
| 1370 | /* When completing on command names, we remove '-' from the list of |
| 1371 | word break characters, since we use it in command names. If the |
| 1372 | readline library sees one in any of the current completion strings, |
| 1373 | it thinks that the string needs to be quoted and automatically supplies |
| 1374 | a leading quote. */ |
| 1375 | char *gdb_completer_command_word_break_characters = |
| 1376 | " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,"; |
| 1377 | |
| 1378 | /* Characters that can be used to quote completion strings. Note that we |
| 1379 | can't include '"' because the gdb C parser treats such quoted sequences |
| 1380 | as strings. */ |
| 1381 | char *gdb_completer_quote_characters = |
| 1382 | "'"; |
| 1383 | |
| 1384 | /* Functions that are used as part of the fancy command line editing. */ |
| 1385 | |
| 1386 | /* This can be used for functions which don't want to complete on symbols |
| 1387 | but don't want to complete on anything else either. */ |
| 1388 | /* ARGSUSED */ |
| 1389 | char ** |
| 1390 | noop_completer (text, prefix) |
| 1391 | char *text; |
| 1392 | char *prefix; |
| 1393 | { |
| 1394 | return NULL; |
| 1395 | } |
| 1396 | |
| 1397 | /* Complete on filenames. */ |
| 1398 | char ** |
| 1399 | filename_completer (text, word) |
| 1400 | char *text; |
| 1401 | char *word; |
| 1402 | { |
| 1403 | /* From readline. */ |
| 1404 | extern char *filename_completion_function (); |
| 1405 | int subsequent_name; |
| 1406 | char **return_val; |
| 1407 | int return_val_used; |
| 1408 | int return_val_alloced; |
| 1409 | |
| 1410 | return_val_used = 0; |
| 1411 | /* Small for testing. */ |
| 1412 | return_val_alloced = 1; |
| 1413 | return_val = (char **) xmalloc (return_val_alloced * sizeof (char *)); |
| 1414 | |
| 1415 | subsequent_name = 0; |
| 1416 | while (1) |
| 1417 | { |
| 1418 | char *p; |
| 1419 | p = filename_completion_function (text, subsequent_name); |
| 1420 | if (return_val_used >= return_val_alloced) |
| 1421 | { |
| 1422 | return_val_alloced *= 2; |
| 1423 | return_val = |
| 1424 | (char **) xrealloc (return_val, |
| 1425 | return_val_alloced * sizeof (char *)); |
| 1426 | } |
| 1427 | if (p == NULL) |
| 1428 | { |
| 1429 | return_val[return_val_used++] = p; |
| 1430 | break; |
| 1431 | } |
| 1432 | /* Like emacs, don't complete on old versions. Especially useful |
| 1433 | in the "source" command. */ |
| 1434 | if (p[strlen (p) - 1] == '~') |
| 1435 | continue; |
| 1436 | |
| 1437 | { |
| 1438 | char *q; |
| 1439 | if (word == text) |
| 1440 | /* Return exactly p. */ |
| 1441 | return_val[return_val_used++] = p; |
| 1442 | else if (word > text) |
| 1443 | { |
| 1444 | /* Return some portion of p. */ |
| 1445 | q = xmalloc (strlen (p) + 5); |
| 1446 | strcpy (q, p + (word - text)); |
| 1447 | return_val[return_val_used++] = q; |
| 1448 | free (p); |
| 1449 | } |
| 1450 | else |
| 1451 | { |
| 1452 | /* Return some of TEXT plus p. */ |
| 1453 | q = xmalloc (strlen (p) + (text - word) + 5); |
| 1454 | strncpy (q, word, text - word); |
| 1455 | q[text - word] = '\0'; |
| 1456 | strcat (q, p); |
| 1457 | return_val[return_val_used++] = q; |
| 1458 | free (p); |
| 1459 | } |
| 1460 | } |
| 1461 | subsequent_name = 1; |
| 1462 | } |
| 1463 | #if 0 |
| 1464 | /* There is no way to do this just long enough to affect quote inserting |
| 1465 | without also affecting the next completion. This should be fixed in |
| 1466 | readline. FIXME. */ |
| 1467 | /* Insure that readline does the right thing |
| 1468 | with respect to inserting quotes. */ |
| 1469 | rl_completer_word_break_characters = ""; |
| 1470 | #endif |
| 1471 | return return_val; |
| 1472 | } |
| 1473 | |
| 1474 | /* Here are some useful test cases for completion. FIXME: These should |
| 1475 | be put in the test suite. They should be tested with both M-? and TAB. |
| 1476 | |
| 1477 | "show output-" "radix" |
| 1478 | "show output" "-radix" |
| 1479 | "p" ambiguous (commands starting with p--path, print, printf, etc.) |
| 1480 | "p " ambiguous (all symbols) |
| 1481 | "info t foo" no completions |
| 1482 | "info t " no completions |
| 1483 | "info t" ambiguous ("info target", "info terminal", etc.) |
| 1484 | "info ajksdlfk" no completions |
| 1485 | "info ajksdlfk " no completions |
| 1486 | "info" " " |
| 1487 | "info " ambiguous (all info commands) |
| 1488 | "p \"a" no completions (string constant) |
| 1489 | "p 'a" ambiguous (all symbols starting with a) |
| 1490 | "p b-a" ambiguous (all symbols starting with a) |
| 1491 | "p b-" ambiguous (all symbols) |
| 1492 | "file Make" "file" (word break hard to screw up here) |
| 1493 | "file ../gdb.stabs/we" "ird" (needs to not break word at slash) |
| 1494 | */ |
| 1495 | |
| 1496 | /* Generate completions one by one for the completer. Each time we are |
| 1497 | called return another potential completion to the caller. |
| 1498 | line_completion just completes on commands or passes the buck to the |
| 1499 | command's completer function, the stuff specific to symbol completion |
| 1500 | is in make_symbol_completion_list. |
| 1501 | |
| 1502 | TEXT is the caller's idea of the "word" we are looking at. |
| 1503 | |
| 1504 | MATCHES is the number of matches that have currently been collected from |
| 1505 | calling this completion function. When zero, then we need to initialize, |
| 1506 | otherwise the initialization has already taken place and we can just |
| 1507 | return the next potential completion string. |
| 1508 | |
| 1509 | LINE_BUFFER is available to be looked at; it contains the entire text |
| 1510 | of the line. POINT is the offset in that line of the cursor. You |
| 1511 | should pretend that the line ends at POINT. |
| 1512 | |
| 1513 | Returns NULL if there are no more completions, else a pointer to a string |
| 1514 | which is a possible completion, it is the caller's responsibility to |
| 1515 | free the string. */ |
| 1516 | |
| 1517 | static char * |
| 1518 | line_completion_function (text, matches, line_buffer, point) |
| 1519 | char *text; |
| 1520 | int matches; |
| 1521 | char *line_buffer; |
| 1522 | int point; |
| 1523 | { |
| 1524 | static char **list = (char **)NULL; /* Cache of completions */ |
| 1525 | static int index; /* Next cached completion */ |
| 1526 | char *output = NULL; |
| 1527 | char *tmp_command, *p; |
| 1528 | /* Pointer within tmp_command which corresponds to text. */ |
| 1529 | char *word; |
| 1530 | struct cmd_list_element *c, *result_list; |
| 1531 | |
| 1532 | if (matches == 0) |
| 1533 | { |
| 1534 | /* The caller is beginning to accumulate a new set of completions, so |
| 1535 | we need to find all of them now, and cache them for returning one at |
| 1536 | a time on future calls. */ |
| 1537 | |
| 1538 | if (list) |
| 1539 | { |
| 1540 | /* Free the storage used by LIST, but not by the strings inside. |
| 1541 | This is because rl_complete_internal () frees the strings. */ |
| 1542 | free ((PTR)list); |
| 1543 | } |
| 1544 | list = 0; |
| 1545 | index = 0; |
| 1546 | |
| 1547 | /* Choose the default set of word break characters to break completions. |
| 1548 | If we later find out that we are doing completions on command strings |
| 1549 | (as opposed to strings supplied by the individual command completer |
| 1550 | functions, which can be any string) then we will switch to the |
| 1551 | special word break set for command strings, which leaves out the |
| 1552 | '-' character used in some commands. */ |
| 1553 | |
| 1554 | rl_completer_word_break_characters = |
| 1555 | gdb_completer_word_break_characters; |
| 1556 | |
| 1557 | /* Decide whether to complete on a list of gdb commands or on symbols. */ |
| 1558 | tmp_command = (char *) alloca (point + 1); |
| 1559 | p = tmp_command; |
| 1560 | |
| 1561 | strncpy (tmp_command, line_buffer, point); |
| 1562 | tmp_command[point] = '\0'; |
| 1563 | /* Since text always contains some number of characters leading up |
| 1564 | to point, we can find the equivalent position in tmp_command |
| 1565 | by subtracting that many characters from the end of tmp_command. */ |
| 1566 | word = tmp_command + point - strlen (text); |
| 1567 | |
| 1568 | if (point == 0) |
| 1569 | { |
| 1570 | /* An empty line we want to consider ambiguous; that is, it |
| 1571 | could be any command. */ |
| 1572 | c = (struct cmd_list_element *) -1; |
| 1573 | result_list = 0; |
| 1574 | } |
| 1575 | else |
| 1576 | { |
| 1577 | c = lookup_cmd_1 (&p, cmdlist, &result_list, 1); |
| 1578 | } |
| 1579 | |
| 1580 | /* Move p up to the next interesting thing. */ |
| 1581 | while (*p == ' ' || *p == '\t') |
| 1582 | { |
| 1583 | p++; |
| 1584 | } |
| 1585 | |
| 1586 | if (!c) |
| 1587 | { |
| 1588 | /* It is an unrecognized command. So there are no |
| 1589 | possible completions. */ |
| 1590 | list = NULL; |
| 1591 | } |
| 1592 | else if (c == (struct cmd_list_element *) -1) |
| 1593 | { |
| 1594 | char *q; |
| 1595 | |
| 1596 | /* lookup_cmd_1 advances p up to the first ambiguous thing, but |
| 1597 | doesn't advance over that thing itself. Do so now. */ |
| 1598 | q = p; |
| 1599 | while (*q && (isalnum (*q) || *q == '-' || *q == '_')) |
| 1600 | ++q; |
| 1601 | if (q != tmp_command + point) |
| 1602 | { |
| 1603 | /* There is something beyond the ambiguous |
| 1604 | command, so there are no possible completions. For |
| 1605 | example, "info t " or "info t foo" does not complete |
| 1606 | to anything, because "info t" can be "info target" or |
| 1607 | "info terminal". */ |
| 1608 | list = NULL; |
| 1609 | } |
| 1610 | else |
| 1611 | { |
| 1612 | /* We're trying to complete on the command which was ambiguous. |
| 1613 | This we can deal with. */ |
| 1614 | if (result_list) |
| 1615 | { |
| 1616 | list = complete_on_cmdlist (*result_list->prefixlist, p, |
| 1617 | word); |
| 1618 | } |
| 1619 | else |
| 1620 | { |
| 1621 | list = complete_on_cmdlist (cmdlist, p, word); |
| 1622 | } |
| 1623 | /* Insure that readline does the right thing with respect to |
| 1624 | inserting quotes. */ |
| 1625 | rl_completer_word_break_characters = |
| 1626 | gdb_completer_command_word_break_characters; |
| 1627 | } |
| 1628 | } |
| 1629 | else |
| 1630 | { |
| 1631 | /* We've recognized a full command. */ |
| 1632 | |
| 1633 | if (p == tmp_command + point) |
| 1634 | { |
| 1635 | /* There is no non-whitespace in the line beyond the command. */ |
| 1636 | |
| 1637 | if (p[-1] == ' ' || p[-1] == '\t') |
| 1638 | { |
| 1639 | /* The command is followed by whitespace; we need to complete |
| 1640 | on whatever comes after command. */ |
| 1641 | if (c->prefixlist) |
| 1642 | { |
| 1643 | /* It is a prefix command; what comes after it is |
| 1644 | a subcommand (e.g. "info "). */ |
| 1645 | list = complete_on_cmdlist (*c->prefixlist, p, word); |
| 1646 | |
| 1647 | /* Insure that readline does the right thing |
| 1648 | with respect to inserting quotes. */ |
| 1649 | rl_completer_word_break_characters = |
| 1650 | gdb_completer_command_word_break_characters; |
| 1651 | } |
| 1652 | else if (c->enums) |
| 1653 | { |
| 1654 | list = complete_on_enum (c->enums, p, word); |
| 1655 | rl_completer_word_break_characters = |
| 1656 | gdb_completer_command_word_break_characters; |
| 1657 | } |
| 1658 | else |
| 1659 | { |
| 1660 | /* It is a normal command; what comes after it is |
| 1661 | completed by the command's completer function. */ |
| 1662 | list = (*c->completer) (p, word); |
| 1663 | } |
| 1664 | } |
| 1665 | else |
| 1666 | { |
| 1667 | /* The command is not followed by whitespace; we need to |
| 1668 | complete on the command itself. e.g. "p" which is a |
| 1669 | command itself but also can complete to "print", "ptype" |
| 1670 | etc. */ |
| 1671 | char *q; |
| 1672 | |
| 1673 | /* Find the command we are completing on. */ |
| 1674 | q = p; |
| 1675 | while (q > tmp_command) |
| 1676 | { |
| 1677 | if (isalnum (q[-1]) || q[-1] == '-' || q[-1] == '_') |
| 1678 | --q; |
| 1679 | else |
| 1680 | break; |
| 1681 | } |
| 1682 | |
| 1683 | list = complete_on_cmdlist (result_list, q, word); |
| 1684 | |
| 1685 | /* Insure that readline does the right thing |
| 1686 | with respect to inserting quotes. */ |
| 1687 | rl_completer_word_break_characters = |
| 1688 | gdb_completer_command_word_break_characters; |
| 1689 | } |
| 1690 | } |
| 1691 | else |
| 1692 | { |
| 1693 | /* There is non-whitespace beyond the command. */ |
| 1694 | |
| 1695 | if (c->prefixlist && !c->allow_unknown) |
| 1696 | { |
| 1697 | /* It is an unrecognized subcommand of a prefix command, |
| 1698 | e.g. "info adsfkdj". */ |
| 1699 | list = NULL; |
| 1700 | } |
| 1701 | else if (c->enums) |
| 1702 | { |
| 1703 | list = complete_on_enum (c->enums, p, word); |
| 1704 | } |
| 1705 | else |
| 1706 | { |
| 1707 | /* It is a normal command. */ |
| 1708 | list = (*c->completer) (p, word); |
| 1709 | } |
| 1710 | } |
| 1711 | } |
| 1712 | } |
| 1713 | |
| 1714 | /* If we found a list of potential completions during initialization then |
| 1715 | dole them out one at a time. The vector of completions is NULL |
| 1716 | terminated, so after returning the last one, return NULL (and continue |
| 1717 | to do so) each time we are called after that, until a new list is |
| 1718 | available. */ |
| 1719 | |
| 1720 | if (list) |
| 1721 | { |
| 1722 | output = list[index]; |
| 1723 | if (output) |
| 1724 | { |
| 1725 | index++; |
| 1726 | } |
| 1727 | } |
| 1728 | |
| 1729 | #if 0 |
| 1730 | /* Can't do this because readline hasn't yet checked the word breaks |
| 1731 | for figuring out whether to insert a quote. */ |
| 1732 | if (output == NULL) |
| 1733 | /* Make sure the word break characters are set back to normal for the |
| 1734 | next time that readline tries to complete something. */ |
| 1735 | rl_completer_word_break_characters = |
| 1736 | gdb_completer_word_break_characters; |
| 1737 | #endif |
| 1738 | |
| 1739 | return (output); |
| 1740 | } |
| 1741 | |
| 1742 | /* Line completion interface function for readline. */ |
| 1743 | |
| 1744 | static char * |
| 1745 | readline_line_completion_function (text, matches) |
| 1746 | char *text; |
| 1747 | int matches; |
| 1748 | { |
| 1749 | return line_completion_function (text, matches, rl_line_buffer, rl_point); |
| 1750 | } |
| 1751 | |
| 1752 | /* Skip over a possibly quoted word (as defined by the quote characters |
| 1753 | and word break characters the completer uses). Returns pointer to the |
| 1754 | location after the "word". */ |
| 1755 | |
| 1756 | char * |
| 1757 | skip_quoted (str) |
| 1758 | char *str; |
| 1759 | { |
| 1760 | char quote_char = '\0'; |
| 1761 | char *scan; |
| 1762 | |
| 1763 | for (scan = str; *scan != '\0'; scan++) |
| 1764 | { |
| 1765 | if (quote_char != '\0') |
| 1766 | { |
| 1767 | /* Ignore everything until the matching close quote char */ |
| 1768 | if (*scan == quote_char) |
| 1769 | { |
| 1770 | /* Found matching close quote. */ |
| 1771 | scan++; |
| 1772 | break; |
| 1773 | } |
| 1774 | } |
| 1775 | else if (strchr (gdb_completer_quote_characters, *scan)) |
| 1776 | { |
| 1777 | /* Found start of a quoted string. */ |
| 1778 | quote_char = *scan; |
| 1779 | } |
| 1780 | else if (strchr (gdb_completer_word_break_characters, *scan)) |
| 1781 | { |
| 1782 | break; |
| 1783 | } |
| 1784 | } |
| 1785 | return (scan); |
| 1786 | } |
| 1787 | |
| 1788 | \f |
| 1789 | #ifdef STOP_SIGNAL |
| 1790 | static void |
| 1791 | stop_sig (signo) |
| 1792 | int signo; |
| 1793 | { |
| 1794 | #if STOP_SIGNAL == SIGTSTP |
| 1795 | signal (SIGTSTP, SIG_DFL); |
| 1796 | sigsetmask (0); |
| 1797 | kill (getpid (), SIGTSTP); |
| 1798 | signal (SIGTSTP, stop_sig); |
| 1799 | #else |
| 1800 | signal (STOP_SIGNAL, stop_sig); |
| 1801 | #endif |
| 1802 | printf_unfiltered ("%s", prompt); |
| 1803 | gdb_flush (gdb_stdout); |
| 1804 | |
| 1805 | /* Forget about any previous command -- null line now will do nothing. */ |
| 1806 | dont_repeat (); |
| 1807 | } |
| 1808 | #endif /* STOP_SIGNAL */ |
| 1809 | |
| 1810 | /* Initialize signal handlers. */ |
| 1811 | static void |
| 1812 | do_nothing (signo) |
| 1813 | int signo; |
| 1814 | { |
| 1815 | } |
| 1816 | |
| 1817 | static void |
| 1818 | init_signals () |
| 1819 | { |
| 1820 | signal (SIGINT, request_quit); |
| 1821 | |
| 1822 | /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get |
| 1823 | passed to the inferior, which we don't want. It would be |
| 1824 | possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but |
| 1825 | on BSD4.3 systems using vfork, that can affect the |
| 1826 | GDB process as well as the inferior (the signal handling tables |
| 1827 | might be in memory, shared between the two). Since we establish |
| 1828 | a handler for SIGQUIT, when we call exec it will set the signal |
| 1829 | to SIG_DFL for us. */ |
| 1830 | signal (SIGQUIT, do_nothing); |
| 1831 | if (signal (SIGHUP, do_nothing) != SIG_IGN) |
| 1832 | signal (SIGHUP, disconnect); |
| 1833 | signal (SIGFPE, float_handler); |
| 1834 | |
| 1835 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
| 1836 | signal (SIGWINCH, SIGWINCH_HANDLER); |
| 1837 | #endif |
| 1838 | } |
| 1839 | \f |
| 1840 | /* Read one line from the command input stream `instream' |
| 1841 | into the local static buffer `linebuffer' (whose current length |
| 1842 | is `linelength'). |
| 1843 | The buffer is made bigger as necessary. |
| 1844 | Returns the address of the start of the line. |
| 1845 | |
| 1846 | NULL is returned for end of file. |
| 1847 | |
| 1848 | *If* the instream == stdin & stdin is a terminal, the line read |
| 1849 | is copied into the file line saver (global var char *line, |
| 1850 | length linesize) so that it can be duplicated. |
| 1851 | |
| 1852 | This routine either uses fancy command line editing or |
| 1853 | simple input as the user has requested. */ |
| 1854 | |
| 1855 | char * |
| 1856 | command_line_input (prrompt, repeat, annotation_suffix) |
| 1857 | char *prrompt; |
| 1858 | int repeat; |
| 1859 | char *annotation_suffix; |
| 1860 | { |
| 1861 | static char *linebuffer = 0; |
| 1862 | static unsigned linelength = 0; |
| 1863 | register char *p; |
| 1864 | char *p1; |
| 1865 | char *rl; |
| 1866 | char *local_prompt = prrompt; |
| 1867 | register int c; |
| 1868 | char *nline; |
| 1869 | char got_eof = 0; |
| 1870 | |
| 1871 | /* The annotation suffix must be non-NULL. */ |
| 1872 | if (annotation_suffix == NULL) |
| 1873 | annotation_suffix = ""; |
| 1874 | |
| 1875 | if (annotation_level > 1 && instream == stdin) |
| 1876 | { |
| 1877 | local_prompt = alloca ((prrompt == NULL ? 0 : strlen (prrompt)) |
| 1878 | + strlen (annotation_suffix) + 40); |
| 1879 | if (prrompt == NULL) |
| 1880 | local_prompt[0] = '\0'; |
| 1881 | else |
| 1882 | strcpy (local_prompt, prrompt); |
| 1883 | strcat (local_prompt, "\n\032\032"); |
| 1884 | strcat (local_prompt, annotation_suffix); |
| 1885 | strcat (local_prompt, "\n"); |
| 1886 | } |
| 1887 | |
| 1888 | if (linebuffer == 0) |
| 1889 | { |
| 1890 | linelength = 80; |
| 1891 | linebuffer = (char *) xmalloc (linelength); |
| 1892 | } |
| 1893 | |
| 1894 | p = linebuffer; |
| 1895 | |
| 1896 | /* Control-C quits instantly if typed while in this loop |
| 1897 | since it should not wait until the user types a newline. */ |
| 1898 | immediate_quit++; |
| 1899 | #ifdef STOP_SIGNAL |
| 1900 | if (job_control) |
| 1901 | signal (STOP_SIGNAL, stop_sig); |
| 1902 | #endif |
| 1903 | |
| 1904 | while (1) |
| 1905 | { |
| 1906 | /* Make sure that all output has been output. Some machines may let |
| 1907 | you get away with leaving out some of the gdb_flush, but not all. */ |
| 1908 | wrap_here (""); |
| 1909 | gdb_flush (gdb_stdout); |
| 1910 | gdb_flush (gdb_stderr); |
| 1911 | |
| 1912 | if (source_file_name != NULL) |
| 1913 | { |
| 1914 | ++source_line_number; |
| 1915 | sprintf (source_error, |
| 1916 | "%s%s:%d: Error in sourced command file:\n", |
| 1917 | source_pre_error, |
| 1918 | source_file_name, |
| 1919 | source_line_number); |
| 1920 | error_pre_print = source_error; |
| 1921 | } |
| 1922 | |
| 1923 | if (annotation_level > 1 && instream == stdin) |
| 1924 | { |
| 1925 | printf_unfiltered ("\n\032\032pre-"); |
| 1926 | printf_unfiltered (annotation_suffix); |
| 1927 | printf_unfiltered ("\n"); |
| 1928 | } |
| 1929 | |
| 1930 | /* Don't use fancy stuff if not talking to stdin. */ |
| 1931 | if (command_editing_p && instream == stdin |
| 1932 | && ISATTY (instream)) |
| 1933 | rl = readline (local_prompt); |
| 1934 | else |
| 1935 | rl = gdb_readline (local_prompt); |
| 1936 | |
| 1937 | if (annotation_level > 1 && instream == stdin) |
| 1938 | { |
| 1939 | printf_unfiltered ("\n\032\032post-"); |
| 1940 | printf_unfiltered (annotation_suffix); |
| 1941 | printf_unfiltered ("\n"); |
| 1942 | } |
| 1943 | |
| 1944 | if (!rl || rl == (char *) EOF) |
| 1945 | { |
| 1946 | got_eof = 1; |
| 1947 | break; |
| 1948 | } |
| 1949 | if (strlen(rl) + 1 + (p - linebuffer) > linelength) |
| 1950 | { |
| 1951 | linelength = strlen(rl) + 1 + (p - linebuffer); |
| 1952 | nline = (char *) xrealloc (linebuffer, linelength); |
| 1953 | p += nline - linebuffer; |
| 1954 | linebuffer = nline; |
| 1955 | } |
| 1956 | p1 = rl; |
| 1957 | /* Copy line. Don't copy null at end. (Leaves line alone |
| 1958 | if this was just a newline) */ |
| 1959 | while (*p1) |
| 1960 | *p++ = *p1++; |
| 1961 | |
| 1962 | free (rl); /* Allocated in readline. */ |
| 1963 | |
| 1964 | if (p == linebuffer || *(p - 1) != '\\') |
| 1965 | break; |
| 1966 | |
| 1967 | p--; /* Put on top of '\'. */ |
| 1968 | local_prompt = (char *) 0; |
| 1969 | } |
| 1970 | |
| 1971 | #ifdef STOP_SIGNAL |
| 1972 | if (job_control) |
| 1973 | signal (STOP_SIGNAL, SIG_DFL); |
| 1974 | #endif |
| 1975 | immediate_quit--; |
| 1976 | |
| 1977 | if (got_eof) |
| 1978 | return NULL; |
| 1979 | |
| 1980 | #define SERVER_COMMAND_LENGTH 7 |
| 1981 | server_command = |
| 1982 | (p - linebuffer > SERVER_COMMAND_LENGTH) |
| 1983 | && STREQN (linebuffer, "server ", SERVER_COMMAND_LENGTH); |
| 1984 | if (server_command) |
| 1985 | { |
| 1986 | /* Note that we don't set `line'. Between this and the check in |
| 1987 | dont_repeat, this insures that repeating will still do the |
| 1988 | right thing. */ |
| 1989 | *p = '\0'; |
| 1990 | return linebuffer + SERVER_COMMAND_LENGTH; |
| 1991 | } |
| 1992 | |
| 1993 | /* Do history expansion if that is wished. */ |
| 1994 | if (history_expansion_p && instream == stdin |
| 1995 | && ISATTY (instream)) |
| 1996 | { |
| 1997 | char *history_value; |
| 1998 | int expanded; |
| 1999 | |
| 2000 | *p = '\0'; /* Insert null now. */ |
| 2001 | expanded = history_expand (linebuffer, &history_value); |
| 2002 | if (expanded) |
| 2003 | { |
| 2004 | /* Print the changes. */ |
| 2005 | printf_unfiltered ("%s\n", history_value); |
| 2006 | |
| 2007 | /* If there was an error, call this function again. */ |
| 2008 | if (expanded < 0) |
| 2009 | { |
| 2010 | free (history_value); |
| 2011 | return command_line_input (prrompt, repeat, annotation_suffix); |
| 2012 | } |
| 2013 | if (strlen (history_value) > linelength) |
| 2014 | { |
| 2015 | linelength = strlen (history_value) + 1; |
| 2016 | linebuffer = (char *) xrealloc (linebuffer, linelength); |
| 2017 | } |
| 2018 | strcpy (linebuffer, history_value); |
| 2019 | p = linebuffer + strlen(linebuffer); |
| 2020 | free (history_value); |
| 2021 | } |
| 2022 | } |
| 2023 | |
| 2024 | /* If we just got an empty line, and that is supposed |
| 2025 | to repeat the previous command, return the value in the |
| 2026 | global buffer. */ |
| 2027 | if (repeat) |
| 2028 | { |
| 2029 | if (p == linebuffer) |
| 2030 | return line; |
| 2031 | p1 = linebuffer; |
| 2032 | while (*p1 == ' ' || *p1 == '\t') |
| 2033 | p1++; |
| 2034 | if (!*p1) |
| 2035 | return line; |
| 2036 | } |
| 2037 | |
| 2038 | *p = 0; |
| 2039 | |
| 2040 | /* Add line to history if appropriate. */ |
| 2041 | if (instream == stdin |
| 2042 | && ISATTY (stdin) && *linebuffer) |
| 2043 | add_history (linebuffer); |
| 2044 | |
| 2045 | /* Note: lines consisting solely of comments are added to the command |
| 2046 | history. This is useful when you type a command, and then |
| 2047 | realize you don't want to execute it quite yet. You can comment |
| 2048 | out the command and then later fetch it from the value history |
| 2049 | and remove the '#'. The kill ring is probably better, but some |
| 2050 | people are in the habit of commenting things out. */ |
| 2051 | p1 = linebuffer; |
| 2052 | while ((c = *p1++) != '\0') |
| 2053 | { |
| 2054 | if (c == '"') |
| 2055 | while ((c = *p1++) != '"') |
| 2056 | { |
| 2057 | /* Make sure an escaped '"' doesn't make us think the string |
| 2058 | is ended. */ |
| 2059 | if (c == '\\') |
| 2060 | parse_escape (&p1); |
| 2061 | if (c == '\0') |
| 2062 | break; |
| 2063 | } |
| 2064 | else if (c == '\'') |
| 2065 | while ((c = *p1++) != '\'') |
| 2066 | { |
| 2067 | /* Make sure an escaped '\'' doesn't make us think the string |
| 2068 | is ended. */ |
| 2069 | if (c == '\\') |
| 2070 | parse_escape (&p1); |
| 2071 | if (c == '\0') |
| 2072 | break; |
| 2073 | } |
| 2074 | else if (c == '#') |
| 2075 | { |
| 2076 | /* Found a comment. */ |
| 2077 | p1[-1] = '\0'; |
| 2078 | break; |
| 2079 | } |
| 2080 | } |
| 2081 | |
| 2082 | /* Save into global buffer if appropriate. */ |
| 2083 | if (repeat) |
| 2084 | { |
| 2085 | if (linelength > linesize) |
| 2086 | { |
| 2087 | line = xrealloc (line, linelength); |
| 2088 | linesize = linelength; |
| 2089 | } |
| 2090 | strcpy (line, linebuffer); |
| 2091 | return line; |
| 2092 | } |
| 2093 | |
| 2094 | return linebuffer; |
| 2095 | } |
| 2096 | \f |
| 2097 | |
| 2098 | /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH |
| 2099 | code bodies. This is typically used when we encounter an "else" |
| 2100 | clause for an "if" command. */ |
| 2101 | |
| 2102 | static void |
| 2103 | realloc_body_list (command, new_length) |
| 2104 | struct command_line *command; |
| 2105 | int new_length; |
| 2106 | { |
| 2107 | int n; |
| 2108 | struct command_line **body_list; |
| 2109 | |
| 2110 | n = command->body_count; |
| 2111 | |
| 2112 | /* Nothing to do? */ |
| 2113 | if (new_length <= n) |
| 2114 | return; |
| 2115 | |
| 2116 | body_list = (struct command_line **) |
| 2117 | xmalloc (sizeof (struct command_line *) * new_length); |
| 2118 | |
| 2119 | memcpy (body_list, command->body_list, sizeof (struct command_line *) * n); |
| 2120 | |
| 2121 | free (command->body_list); |
| 2122 | command->body_list = body_list; |
| 2123 | command->body_count = new_length; |
| 2124 | } |
| 2125 | |
| 2126 | /* Read one line from the input stream. If the command is an "else" or |
| 2127 | "end", return such an indication to the caller. */ |
| 2128 | |
| 2129 | static enum misc_command_type |
| 2130 | read_next_line (command) |
| 2131 | struct command_line **command; |
| 2132 | { |
| 2133 | char *p, *p1, *prompt_ptr, control_prompt[256]; |
| 2134 | int i = 0; |
| 2135 | |
| 2136 | if (control_level >= 254) |
| 2137 | error ("Control nesting too deep!\n"); |
| 2138 | |
| 2139 | /* Set a prompt based on the nesting of the control commands. */ |
| 2140 | if (instream == stdin) |
| 2141 | { |
| 2142 | for (i = 0; i < control_level; i++) |
| 2143 | control_prompt[i] = ' '; |
| 2144 | control_prompt[i] = '>'; |
| 2145 | control_prompt[i+1] = '\0'; |
| 2146 | prompt_ptr = (char *)&control_prompt[0]; |
| 2147 | } |
| 2148 | else |
| 2149 | prompt_ptr = NULL; |
| 2150 | |
| 2151 | p = command_line_input (prompt_ptr, instream == stdin, "commands"); |
| 2152 | |
| 2153 | /* Not sure what to do here. */ |
| 2154 | if (p == NULL) |
| 2155 | return end_command; |
| 2156 | |
| 2157 | /* Strip leading and trailing whitespace. */ |
| 2158 | while (*p == ' ' || *p == '\t') |
| 2159 | p++; |
| 2160 | |
| 2161 | p1 = p + strlen (p); |
| 2162 | while (p1 != p && (p1[-1] == ' ' || p1[-1] == '\t')) |
| 2163 | p1--; |
| 2164 | |
| 2165 | /* Blanks and comments don't really do anything, but we need to |
| 2166 | distinguish them from else, end and other commands which can be |
| 2167 | executed. */ |
| 2168 | if (p1 == p || p[0] == '#') |
| 2169 | return nop_command; |
| 2170 | |
| 2171 | /* Is this the end of a simple, while, or if control structure? */ |
| 2172 | if (p1 - p == 3 && !strncmp (p, "end", 3)) |
| 2173 | return end_command; |
| 2174 | |
| 2175 | /* Is the else clause of an if control structure? */ |
| 2176 | if (p1 - p == 4 && !strncmp (p, "else", 4)) |
| 2177 | return else_command; |
| 2178 | |
| 2179 | /* Check for while, if, break, continue, etc and build a new command |
| 2180 | line structure for them. */ |
| 2181 | if (p1 - p > 5 && !strncmp (p, "while", 5)) |
| 2182 | *command = build_command_line (while_control, p + 6); |
| 2183 | else if (p1 - p > 2 && !strncmp (p, "if", 2)) |
| 2184 | *command = build_command_line (if_control, p + 3); |
| 2185 | else if (p1 - p == 5 && !strncmp (p, "loop_break", 5)) |
| 2186 | { |
| 2187 | *command = (struct command_line *) |
| 2188 | xmalloc (sizeof (struct command_line)); |
| 2189 | (*command)->next = NULL; |
| 2190 | (*command)->line = NULL; |
| 2191 | (*command)->control_type = break_control; |
| 2192 | (*command)->body_count = 0; |
| 2193 | (*command)->body_list = NULL; |
| 2194 | } |
| 2195 | else if (p1 - p == 8 && !strncmp (p, "loop_continue", 8)) |
| 2196 | { |
| 2197 | *command = (struct command_line *) |
| 2198 | xmalloc (sizeof (struct command_line)); |
| 2199 | (*command)->next = NULL; |
| 2200 | (*command)->line = NULL; |
| 2201 | (*command)->control_type = continue_control; |
| 2202 | (*command)->body_count = 0; |
| 2203 | (*command)->body_list = NULL; |
| 2204 | } |
| 2205 | else |
| 2206 | { |
| 2207 | /* A normal command. */ |
| 2208 | *command = (struct command_line *) |
| 2209 | xmalloc (sizeof (struct command_line)); |
| 2210 | (*command)->next = NULL; |
| 2211 | (*command)->line = savestring (p, p1 - p); |
| 2212 | (*command)->control_type = simple_control; |
| 2213 | (*command)->body_count = 0; |
| 2214 | (*command)->body_list = NULL; |
| 2215 | } |
| 2216 | |
| 2217 | /* Nothing special. */ |
| 2218 | return ok_command; |
| 2219 | } |
| 2220 | |
| 2221 | /* Recursively read in the control structures and create a command_line |
| 2222 | tructure from them. |
| 2223 | |
| 2224 | The parent_control parameter is the control structure in which the |
| 2225 | following commands are nested. */ |
| 2226 | |
| 2227 | static enum command_control_type |
| 2228 | recurse_read_control_structure (current_cmd) |
| 2229 | struct command_line *current_cmd; |
| 2230 | { |
| 2231 | int current_body, i; |
| 2232 | enum misc_command_type val; |
| 2233 | enum command_control_type ret; |
| 2234 | struct command_line **body_ptr, *child_tail, *next; |
| 2235 | struct cleanup *old_chains, *tmp_chains; |
| 2236 | |
| 2237 | old_chains = NULL; |
| 2238 | child_tail = NULL; |
| 2239 | current_body = 1; |
| 2240 | |
| 2241 | /* Sanity checks. */ |
| 2242 | if (current_cmd->control_type == simple_control) |
| 2243 | { |
| 2244 | error ("Recursed on a simple control type\n"); |
| 2245 | return invalid_control; |
| 2246 | } |
| 2247 | |
| 2248 | if (current_body > current_cmd->body_count) |
| 2249 | { |
| 2250 | error ("Allocated body is smaller than this command type needs\n"); |
| 2251 | return invalid_control; |
| 2252 | } |
| 2253 | |
| 2254 | /* Read lines from the input stream and build control structures. */ |
| 2255 | while (1) |
| 2256 | { |
| 2257 | dont_repeat (); |
| 2258 | |
| 2259 | next = NULL; |
| 2260 | val = read_next_line (&next); |
| 2261 | |
| 2262 | /* Just skip blanks and comments. */ |
| 2263 | if (val == nop_command) |
| 2264 | continue; |
| 2265 | |
| 2266 | if (val == end_command) |
| 2267 | { |
| 2268 | if (current_cmd->control_type == while_control |
| 2269 | || current_cmd->control_type == if_control) |
| 2270 | { |
| 2271 | /* Success reading an entire control structure. */ |
| 2272 | ret = simple_control; |
| 2273 | break; |
| 2274 | } |
| 2275 | else |
| 2276 | { |
| 2277 | ret = invalid_control; |
| 2278 | break; |
| 2279 | } |
| 2280 | } |
| 2281 | |
| 2282 | /* Not the end of a control structure. */ |
| 2283 | if (val == else_command) |
| 2284 | { |
| 2285 | if (current_cmd->control_type == if_control |
| 2286 | && current_body == 1) |
| 2287 | { |
| 2288 | realloc_body_list (current_cmd, 2); |
| 2289 | current_body = 2; |
| 2290 | child_tail = NULL; |
| 2291 | continue; |
| 2292 | } |
| 2293 | else |
| 2294 | { |
| 2295 | ret = invalid_control; |
| 2296 | break; |
| 2297 | } |
| 2298 | } |
| 2299 | |
| 2300 | if (child_tail) |
| 2301 | { |
| 2302 | child_tail->next = next; |
| 2303 | } |
| 2304 | else |
| 2305 | { |
| 2306 | /* We have just read the first line of the child's control |
| 2307 | structure. From now on, arrange to throw away the line |
| 2308 | we have if we quit or get an error. */ |
| 2309 | body_ptr = current_cmd->body_list; |
| 2310 | for (i = 1; i < current_body; i++) |
| 2311 | body_ptr++; |
| 2312 | |
| 2313 | *body_ptr = next; |
| 2314 | |
| 2315 | tmp_chains = make_cleanup (free_command_lines, body_ptr); |
| 2316 | |
| 2317 | if (!old_chains) |
| 2318 | old_chains = tmp_chains; |
| 2319 | } |
| 2320 | |
| 2321 | child_tail = next; |
| 2322 | |
| 2323 | /* If the latest line is another control structure, then recurse |
| 2324 | on it. */ |
| 2325 | if (next->control_type == while_control |
| 2326 | || next->control_type == if_control) |
| 2327 | { |
| 2328 | control_level++; |
| 2329 | ret = recurse_read_control_structure (next); |
| 2330 | control_level--; |
| 2331 | |
| 2332 | if (ret != simple_control) |
| 2333 | break; |
| 2334 | } |
| 2335 | } |
| 2336 | |
| 2337 | dont_repeat (); |
| 2338 | if (ret == invalid_control && old_chains) |
| 2339 | do_cleanups (old_chains); |
| 2340 | else if (old_chains) |
| 2341 | discard_cleanups (old_chains); |
| 2342 | |
| 2343 | return ret; |
| 2344 | } |
| 2345 | |
| 2346 | |
| 2347 | /* Read lines from the input stream |
| 2348 | and accumulate them in a chain of struct command_line's |
| 2349 | which is then returned. */ |
| 2350 | |
| 2351 | struct command_line * |
| 2352 | read_command_lines () |
| 2353 | { |
| 2354 | struct command_line *head, *tail, *next; |
| 2355 | struct cleanup *old_chain; |
| 2356 | enum command_control_type ret; |
| 2357 | enum misc_command_type val; |
| 2358 | |
| 2359 | head = tail = NULL; |
| 2360 | old_chain = NULL; |
| 2361 | |
| 2362 | while (1) |
| 2363 | { |
| 2364 | val = read_next_line (&next); |
| 2365 | |
| 2366 | /* Ignore blank lines or comments. */ |
| 2367 | if (val == nop_command) |
| 2368 | continue; |
| 2369 | |
| 2370 | if (val == end_command) |
| 2371 | { |
| 2372 | ret = simple_control; |
| 2373 | break; |
| 2374 | } |
| 2375 | |
| 2376 | if (val != ok_command) |
| 2377 | { |
| 2378 | ret = invalid_control; |
| 2379 | break; |
| 2380 | } |
| 2381 | |
| 2382 | if (next->control_type == while_control |
| 2383 | || next->control_type == if_control) |
| 2384 | { |
| 2385 | control_level++; |
| 2386 | ret = recurse_read_control_structure (next); |
| 2387 | control_level--; |
| 2388 | |
| 2389 | if (ret == invalid_control) |
| 2390 | break; |
| 2391 | } |
| 2392 | |
| 2393 | if (tail) |
| 2394 | { |
| 2395 | tail->next = next; |
| 2396 | } |
| 2397 | else |
| 2398 | { |
| 2399 | head = next; |
| 2400 | old_chain = make_cleanup (free_command_lines, &head); |
| 2401 | } |
| 2402 | tail = next; |
| 2403 | } |
| 2404 | |
| 2405 | dont_repeat (); |
| 2406 | |
| 2407 | if (head) |
| 2408 | { |
| 2409 | if (ret != invalid_control) |
| 2410 | { |
| 2411 | discard_cleanups (old_chain); |
| 2412 | return head; |
| 2413 | } |
| 2414 | else |
| 2415 | do_cleanups (old_chain); |
| 2416 | } |
| 2417 | |
| 2418 | return NULL; |
| 2419 | } |
| 2420 | |
| 2421 | /* Free a chain of struct command_line's. */ |
| 2422 | |
| 2423 | void |
| 2424 | free_command_lines (lptr) |
| 2425 | struct command_line **lptr; |
| 2426 | { |
| 2427 | register struct command_line *l = *lptr; |
| 2428 | register struct command_line *next; |
| 2429 | struct command_line **blist; |
| 2430 | int i; |
| 2431 | |
| 2432 | while (l) |
| 2433 | { |
| 2434 | if (l->body_count > 0) |
| 2435 | { |
| 2436 | blist = l->body_list; |
| 2437 | for (i = 0; i < l->body_count; i++, blist++) |
| 2438 | free_command_lines (blist); |
| 2439 | } |
| 2440 | next = l->next; |
| 2441 | free (l->line); |
| 2442 | free ((PTR)l); |
| 2443 | l = next; |
| 2444 | } |
| 2445 | } |
| 2446 | \f |
| 2447 | /* Add an element to the list of info subcommands. */ |
| 2448 | |
| 2449 | void |
| 2450 | add_info (name, fun, doc) |
| 2451 | char *name; |
| 2452 | void (*fun) PARAMS ((char *, int)); |
| 2453 | char *doc; |
| 2454 | { |
| 2455 | add_cmd (name, no_class, fun, doc, &infolist); |
| 2456 | } |
| 2457 | |
| 2458 | /* Add an alias to the list of info subcommands. */ |
| 2459 | |
| 2460 | void |
| 2461 | add_info_alias (name, oldname, abbrev_flag) |
| 2462 | char *name; |
| 2463 | char *oldname; |
| 2464 | int abbrev_flag; |
| 2465 | { |
| 2466 | add_alias_cmd (name, oldname, 0, abbrev_flag, &infolist); |
| 2467 | } |
| 2468 | |
| 2469 | /* The "info" command is defined as a prefix, with allow_unknown = 0. |
| 2470 | Therefore, its own definition is called only for "info" with no args. */ |
| 2471 | |
| 2472 | /* ARGSUSED */ |
| 2473 | static void |
| 2474 | info_command (arg, from_tty) |
| 2475 | char *arg; |
| 2476 | int from_tty; |
| 2477 | { |
| 2478 | printf_unfiltered ("\"info\" must be followed by the name of an info command.\n"); |
| 2479 | help_list (infolist, "info ", -1, gdb_stdout); |
| 2480 | } |
| 2481 | |
| 2482 | /* The "complete" command is used by Emacs to implement completion. */ |
| 2483 | |
| 2484 | /* ARGSUSED */ |
| 2485 | static void |
| 2486 | complete_command (arg, from_tty) |
| 2487 | char *arg; |
| 2488 | int from_tty; |
| 2489 | { |
| 2490 | int i; |
| 2491 | int argpoint; |
| 2492 | char *completion; |
| 2493 | |
| 2494 | dont_repeat (); |
| 2495 | |
| 2496 | if (arg == NULL) |
| 2497 | arg = ""; |
| 2498 | argpoint = strlen (arg); |
| 2499 | |
| 2500 | for (completion = line_completion_function (arg, i = 0, arg, argpoint); |
| 2501 | completion; |
| 2502 | completion = line_completion_function (arg, ++i, arg, argpoint)) |
| 2503 | { |
| 2504 | printf_unfiltered ("%s\n", completion); |
| 2505 | free (completion); |
| 2506 | } |
| 2507 | } |
| 2508 | |
| 2509 | /* The "show" command with no arguments shows all the settings. */ |
| 2510 | |
| 2511 | /* ARGSUSED */ |
| 2512 | static void |
| 2513 | show_command (arg, from_tty) |
| 2514 | char *arg; |
| 2515 | int from_tty; |
| 2516 | { |
| 2517 | cmd_show_list (showlist, from_tty, ""); |
| 2518 | } |
| 2519 | \f |
| 2520 | /* Add an element to the list of commands. */ |
| 2521 | |
| 2522 | void |
| 2523 | add_com (name, class, fun, doc) |
| 2524 | char *name; |
| 2525 | enum command_class class; |
| 2526 | void (*fun) PARAMS ((char *, int)); |
| 2527 | char *doc; |
| 2528 | { |
| 2529 | add_cmd (name, class, fun, doc, &cmdlist); |
| 2530 | } |
| 2531 | |
| 2532 | /* Add an alias or abbreviation command to the list of commands. */ |
| 2533 | |
| 2534 | void |
| 2535 | add_com_alias (name, oldname, class, abbrev_flag) |
| 2536 | char *name; |
| 2537 | char *oldname; |
| 2538 | enum command_class class; |
| 2539 | int abbrev_flag; |
| 2540 | { |
| 2541 | add_alias_cmd (name, oldname, class, abbrev_flag, &cmdlist); |
| 2542 | } |
| 2543 | |
| 2544 | void |
| 2545 | error_no_arg (why) |
| 2546 | char *why; |
| 2547 | { |
| 2548 | error ("Argument required (%s).", why); |
| 2549 | } |
| 2550 | |
| 2551 | /* ARGSUSED */ |
| 2552 | static void |
| 2553 | help_command (command, from_tty) |
| 2554 | char *command; |
| 2555 | int from_tty; /* Ignored */ |
| 2556 | { |
| 2557 | help_cmd (command, gdb_stdout); |
| 2558 | } |
| 2559 | \f |
| 2560 | static void |
| 2561 | validate_comname (comname) |
| 2562 | char *comname; |
| 2563 | { |
| 2564 | register char *p; |
| 2565 | |
| 2566 | if (comname == 0) |
| 2567 | error_no_arg ("name of command to define"); |
| 2568 | |
| 2569 | p = comname; |
| 2570 | while (*p) |
| 2571 | { |
| 2572 | if (!isalnum(*p) && *p != '-') |
| 2573 | error ("Junk in argument list: \"%s\"", p); |
| 2574 | p++; |
| 2575 | } |
| 2576 | } |
| 2577 | |
| 2578 | /* This is just a placeholder in the command data structures. */ |
| 2579 | static void |
| 2580 | user_defined_command (ignore, from_tty) |
| 2581 | char *ignore; |
| 2582 | int from_tty; |
| 2583 | { |
| 2584 | } |
| 2585 | |
| 2586 | static void |
| 2587 | define_command (comname, from_tty) |
| 2588 | char *comname; |
| 2589 | int from_tty; |
| 2590 | { |
| 2591 | register struct command_line *cmds; |
| 2592 | register struct cmd_list_element *c, *newc, *hookc = 0; |
| 2593 | char *tem = comname; |
| 2594 | #define HOOK_STRING "hook-" |
| 2595 | #define HOOK_LEN 5 |
| 2596 | |
| 2597 | validate_comname (comname); |
| 2598 | |
| 2599 | /* Look it up, and verify that we got an exact match. */ |
| 2600 | c = lookup_cmd (&tem, cmdlist, "", -1, 1); |
| 2601 | if (c && !STREQ (comname, c->name)) |
| 2602 | c = 0; |
| 2603 | |
| 2604 | if (c) |
| 2605 | { |
| 2606 | if (c->class == class_user || c->class == class_alias) |
| 2607 | tem = "Redefine command \"%s\"? "; |
| 2608 | else |
| 2609 | tem = "Really redefine built-in command \"%s\"? "; |
| 2610 | if (!query (tem, c->name)) |
| 2611 | error ("Command \"%s\" not redefined.", c->name); |
| 2612 | } |
| 2613 | |
| 2614 | /* If this new command is a hook, then mark the command which it |
| 2615 | is hooking. Note that we allow hooking `help' commands, so that |
| 2616 | we can hook the `stop' pseudo-command. */ |
| 2617 | |
| 2618 | if (!strncmp (comname, HOOK_STRING, HOOK_LEN)) |
| 2619 | { |
| 2620 | /* Look up cmd it hooks, and verify that we got an exact match. */ |
| 2621 | tem = comname+HOOK_LEN; |
| 2622 | hookc = lookup_cmd (&tem, cmdlist, "", -1, 0); |
| 2623 | if (hookc && !STREQ (comname+HOOK_LEN, hookc->name)) |
| 2624 | hookc = 0; |
| 2625 | if (!hookc) |
| 2626 | { |
| 2627 | warning ("Your new `%s' command does not hook any existing command.", |
| 2628 | comname); |
| 2629 | if (!query ("Proceed? ")) |
| 2630 | error ("Not confirmed."); |
| 2631 | } |
| 2632 | } |
| 2633 | |
| 2634 | comname = savestring (comname, strlen (comname)); |
| 2635 | |
| 2636 | /* If the rest of the commands will be case insensitive, this one |
| 2637 | should behave in the same manner. */ |
| 2638 | for (tem = comname; *tem; tem++) |
| 2639 | if (isupper(*tem)) *tem = tolower(*tem); |
| 2640 | |
| 2641 | if (from_tty) |
| 2642 | { |
| 2643 | printf_unfiltered ("Type commands for definition of \"%s\".\n\ |
| 2644 | End with a line saying just \"end\".\n", comname); |
| 2645 | gdb_flush (gdb_stdout); |
| 2646 | } |
| 2647 | |
| 2648 | control_level = 0; |
| 2649 | cmds = read_command_lines (); |
| 2650 | |
| 2651 | if (c && c->class == class_user) |
| 2652 | free_command_lines (&c->user_commands); |
| 2653 | |
| 2654 | newc = add_cmd (comname, class_user, user_defined_command, |
| 2655 | (c && c->class == class_user) |
| 2656 | ? c->doc : savestring ("User-defined.", 13), &cmdlist); |
| 2657 | newc->user_commands = cmds; |
| 2658 | |
| 2659 | /* If this new command is a hook, then mark both commands as being |
| 2660 | tied. */ |
| 2661 | if (hookc) |
| 2662 | { |
| 2663 | hookc->hook = newc; /* Target gets hooked. */ |
| 2664 | newc->hookee = hookc; /* We are marked as hooking target cmd. */ |
| 2665 | } |
| 2666 | } |
| 2667 | |
| 2668 | static void |
| 2669 | document_command (comname, from_tty) |
| 2670 | char *comname; |
| 2671 | int from_tty; |
| 2672 | { |
| 2673 | struct command_line *doclines; |
| 2674 | register struct cmd_list_element *c; |
| 2675 | char *tem = comname; |
| 2676 | |
| 2677 | validate_comname (comname); |
| 2678 | |
| 2679 | c = lookup_cmd (&tem, cmdlist, "", 0, 1); |
| 2680 | |
| 2681 | if (c->class != class_user) |
| 2682 | error ("Command \"%s\" is built-in.", comname); |
| 2683 | |
| 2684 | if (from_tty) |
| 2685 | printf_unfiltered ("Type documentation for \"%s\".\n\ |
| 2686 | End with a line saying just \"end\".\n", comname); |
| 2687 | |
| 2688 | doclines = read_command_lines (); |
| 2689 | |
| 2690 | if (c->doc) free (c->doc); |
| 2691 | |
| 2692 | { |
| 2693 | register struct command_line *cl1; |
| 2694 | register int len = 0; |
| 2695 | |
| 2696 | for (cl1 = doclines; cl1; cl1 = cl1->next) |
| 2697 | len += strlen (cl1->line) + 1; |
| 2698 | |
| 2699 | c->doc = (char *) xmalloc (len + 1); |
| 2700 | *c->doc = 0; |
| 2701 | |
| 2702 | for (cl1 = doclines; cl1; cl1 = cl1->next) |
| 2703 | { |
| 2704 | strcat (c->doc, cl1->line); |
| 2705 | if (cl1->next) |
| 2706 | strcat (c->doc, "\n"); |
| 2707 | } |
| 2708 | } |
| 2709 | |
| 2710 | free_command_lines (&doclines); |
| 2711 | } |
| 2712 | \f |
| 2713 | void |
| 2714 | print_gnu_advertisement () |
| 2715 | { |
| 2716 | printf_unfiltered ("\ |
| 2717 | GDB is free software and you are welcome to distribute copies of it\n\ |
| 2718 | under certain conditions; type \"show copying\" to see the conditions.\n\ |
| 2719 | There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\ |
| 2720 | "); |
| 2721 | } |
| 2722 | |
| 2723 | void |
| 2724 | print_gdb_version (stream) |
| 2725 | GDB_FILE *stream; |
| 2726 | { |
| 2727 | fprintf_filtered (stream, "\ |
| 2728 | GDB %s (%s", version, host_name); |
| 2729 | |
| 2730 | if (!STREQ (host_name, target_name)) |
| 2731 | fprintf_filtered (stream, " --target %s", target_name); |
| 2732 | |
| 2733 | fprintf_filtered (stream, "), "); |
| 2734 | wrap_here(""); |
| 2735 | fprintf_filtered (stream, "Copyright 1995 Free Software Foundation, Inc."); |
| 2736 | } |
| 2737 | |
| 2738 | /* ARGSUSED */ |
| 2739 | static void |
| 2740 | show_version (args, from_tty) |
| 2741 | char *args; |
| 2742 | int from_tty; |
| 2743 | { |
| 2744 | immediate_quit++; |
| 2745 | print_gnu_advertisement (); |
| 2746 | print_gdb_version (gdb_stdout); |
| 2747 | printf_filtered ("\n"); |
| 2748 | immediate_quit--; |
| 2749 | } |
| 2750 | \f |
| 2751 | /* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb |
| 2752 | is obsolete. */ |
| 2753 | |
| 2754 | void |
| 2755 | print_prompt () |
| 2756 | { |
| 2757 | printf_unfiltered ("%s", prompt); |
| 2758 | gdb_flush (gdb_stdout); |
| 2759 | } |
| 2760 | \f |
| 2761 | void |
| 2762 | quit_command (args, from_tty) |
| 2763 | char *args; |
| 2764 | int from_tty; |
| 2765 | { |
| 2766 | if (inferior_pid != 0 && target_has_execution) |
| 2767 | { |
| 2768 | if (attach_flag) |
| 2769 | { |
| 2770 | if (query ("The program is running. Quit anyway (and detach it)? ")) |
| 2771 | target_detach (args, from_tty); |
| 2772 | else |
| 2773 | error ("Not confirmed."); |
| 2774 | } |
| 2775 | else |
| 2776 | { |
| 2777 | if (query ("The program is running. Quit anyway (and kill it)? ")) |
| 2778 | target_kill (); |
| 2779 | else |
| 2780 | error ("Not confirmed."); |
| 2781 | } |
| 2782 | } |
| 2783 | /* UDI wants this, to kill the TIP. */ |
| 2784 | target_close (1); |
| 2785 | |
| 2786 | /* Save the history information if it is appropriate to do so. */ |
| 2787 | if (write_history_p && history_filename) |
| 2788 | write_history (history_filename); |
| 2789 | |
| 2790 | exit (0); |
| 2791 | } |
| 2792 | |
| 2793 | /* Returns whether GDB is running on a terminal and whether the user |
| 2794 | desires that questions be asked of them on that terminal. */ |
| 2795 | |
| 2796 | int |
| 2797 | input_from_terminal_p () |
| 2798 | { |
| 2799 | return gdb_has_a_terminal () && (instream == stdin) & caution; |
| 2800 | } |
| 2801 | \f |
| 2802 | /* ARGSUSED */ |
| 2803 | static void |
| 2804 | pwd_command (args, from_tty) |
| 2805 | char *args; |
| 2806 | int from_tty; |
| 2807 | { |
| 2808 | if (args) error ("The \"pwd\" command does not take an argument: %s", args); |
| 2809 | getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)); |
| 2810 | |
| 2811 | if (!STREQ (gdb_dirbuf, current_directory)) |
| 2812 | printf_unfiltered ("Working directory %s\n (canonically %s).\n", |
| 2813 | current_directory, gdb_dirbuf); |
| 2814 | else |
| 2815 | printf_unfiltered ("Working directory %s.\n", current_directory); |
| 2816 | } |
| 2817 | |
| 2818 | void |
| 2819 | cd_command (dir, from_tty) |
| 2820 | char *dir; |
| 2821 | int from_tty; |
| 2822 | { |
| 2823 | int len; |
| 2824 | /* Found something other than leading repetitions of "/..". */ |
| 2825 | int found_real_path; |
| 2826 | char *p; |
| 2827 | |
| 2828 | /* If the new directory is absolute, repeat is a no-op; if relative, |
| 2829 | repeat might be useful but is more likely to be a mistake. */ |
| 2830 | dont_repeat (); |
| 2831 | |
| 2832 | if (dir == 0) |
| 2833 | error_no_arg ("new working directory"); |
| 2834 | |
| 2835 | dir = tilde_expand (dir); |
| 2836 | make_cleanup (free, dir); |
| 2837 | |
| 2838 | if (chdir (dir) < 0) |
| 2839 | perror_with_name (dir); |
| 2840 | |
| 2841 | len = strlen (dir); |
| 2842 | dir = savestring (dir, len - (len > 1 && SLASH_P(dir[len-1]))); |
| 2843 | if (ROOTED_P(dir)) |
| 2844 | current_directory = dir; |
| 2845 | else |
| 2846 | { |
| 2847 | if (SLASH_P (current_directory[0]) && current_directory[1] == '\0') |
| 2848 | current_directory = concat (current_directory, dir, NULL); |
| 2849 | else |
| 2850 | current_directory = concat (current_directory, SLASH_STRING, dir, NULL); |
| 2851 | free (dir); |
| 2852 | } |
| 2853 | |
| 2854 | /* Now simplify any occurrences of `.' and `..' in the pathname. */ |
| 2855 | |
| 2856 | found_real_path = 0; |
| 2857 | for (p = current_directory; *p;) |
| 2858 | { |
| 2859 | if (SLASH_P (p[0]) && p[1] == '.' && (p[2] == 0 || SLASH_P (p[2]))) |
| 2860 | strcpy (p, p + 2); |
| 2861 | else if (SLASH_P (p[0]) && p[1] == '.' && p[2] == '.' |
| 2862 | && (p[3] == 0 || SLASH_P (p[3]))) |
| 2863 | { |
| 2864 | if (found_real_path) |
| 2865 | { |
| 2866 | /* Search backwards for the directory just before the "/.." |
| 2867 | and obliterate it and the "/..". */ |
| 2868 | char *q = p; |
| 2869 | while (q != current_directory && ! SLASH_P (q[-1])) |
| 2870 | --q; |
| 2871 | |
| 2872 | if (q == current_directory) |
| 2873 | /* current_directory is |
| 2874 | a relative pathname ("can't happen"--leave it alone). */ |
| 2875 | ++p; |
| 2876 | else |
| 2877 | { |
| 2878 | strcpy (q - 1, p + 3); |
| 2879 | p = q - 1; |
| 2880 | } |
| 2881 | } |
| 2882 | else |
| 2883 | /* We are dealing with leading repetitions of "/..", for example |
| 2884 | "/../..", which is the Mach super-root. */ |
| 2885 | p += 3; |
| 2886 | } |
| 2887 | else |
| 2888 | { |
| 2889 | found_real_path = 1; |
| 2890 | ++p; |
| 2891 | } |
| 2892 | } |
| 2893 | |
| 2894 | forget_cached_source_info (); |
| 2895 | |
| 2896 | if (from_tty) |
| 2897 | pwd_command ((char *) 0, 1); |
| 2898 | } |
| 2899 | \f |
| 2900 | struct source_cleanup_lines_args { |
| 2901 | int old_line; |
| 2902 | char *old_file; |
| 2903 | char *old_pre_error; |
| 2904 | char *old_error_pre_print; |
| 2905 | }; |
| 2906 | |
| 2907 | static void |
| 2908 | source_cleanup_lines (args) |
| 2909 | PTR args; |
| 2910 | { |
| 2911 | struct source_cleanup_lines_args *p = |
| 2912 | (struct source_cleanup_lines_args *)args; |
| 2913 | source_line_number = p->old_line; |
| 2914 | source_file_name = p->old_file; |
| 2915 | source_pre_error = p->old_pre_error; |
| 2916 | error_pre_print = p->old_error_pre_print; |
| 2917 | } |
| 2918 | |
| 2919 | /* ARGSUSED */ |
| 2920 | void |
| 2921 | source_command (args, from_tty) |
| 2922 | char *args; |
| 2923 | int from_tty; |
| 2924 | { |
| 2925 | FILE *stream; |
| 2926 | struct cleanup *old_cleanups; |
| 2927 | char *file = args; |
| 2928 | struct source_cleanup_lines_args old_lines; |
| 2929 | int needed_length; |
| 2930 | |
| 2931 | if (file == NULL) |
| 2932 | { |
| 2933 | error ("source command requires pathname of file to source."); |
| 2934 | } |
| 2935 | |
| 2936 | file = tilde_expand (file); |
| 2937 | old_cleanups = make_cleanup (free, file); |
| 2938 | |
| 2939 | stream = fopen (file, FOPEN_RT); |
| 2940 | if (stream == 0) |
| 2941 | perror_with_name (file); |
| 2942 | |
| 2943 | make_cleanup (fclose, stream); |
| 2944 | |
| 2945 | old_lines.old_line = source_line_number; |
| 2946 | old_lines.old_file = source_file_name; |
| 2947 | old_lines.old_pre_error = source_pre_error; |
| 2948 | old_lines.old_error_pre_print = error_pre_print; |
| 2949 | make_cleanup (source_cleanup_lines, &old_lines); |
| 2950 | source_line_number = 0; |
| 2951 | source_file_name = file; |
| 2952 | source_pre_error = error_pre_print == NULL ? "" : error_pre_print; |
| 2953 | source_pre_error = savestring (source_pre_error, strlen (source_pre_error)); |
| 2954 | make_cleanup (free, source_pre_error); |
| 2955 | /* This will get set every time we read a line. So it won't stay "" for |
| 2956 | long. */ |
| 2957 | error_pre_print = ""; |
| 2958 | |
| 2959 | needed_length = strlen (source_file_name) + strlen (source_pre_error) + 80; |
| 2960 | if (source_error_allocated < needed_length) |
| 2961 | { |
| 2962 | source_error_allocated *= 2; |
| 2963 | if (source_error_allocated < needed_length) |
| 2964 | source_error_allocated = needed_length; |
| 2965 | if (source_error == NULL) |
| 2966 | source_error = xmalloc (source_error_allocated); |
| 2967 | else |
| 2968 | source_error = xrealloc (source_error, source_error_allocated); |
| 2969 | } |
| 2970 | |
| 2971 | read_command_file (stream); |
| 2972 | |
| 2973 | do_cleanups (old_cleanups); |
| 2974 | } |
| 2975 | |
| 2976 | /* ARGSUSED */ |
| 2977 | static void |
| 2978 | echo_command (text, from_tty) |
| 2979 | char *text; |
| 2980 | int from_tty; |
| 2981 | { |
| 2982 | char *p = text; |
| 2983 | register int c; |
| 2984 | |
| 2985 | if (text) |
| 2986 | while ((c = *p++) != '\0') |
| 2987 | { |
| 2988 | if (c == '\\') |
| 2989 | { |
| 2990 | /* \ at end of argument is used after spaces |
| 2991 | so they won't be lost. */ |
| 2992 | if (*p == 0) |
| 2993 | return; |
| 2994 | |
| 2995 | c = parse_escape (&p); |
| 2996 | if (c >= 0) |
| 2997 | printf_filtered ("%c", c); |
| 2998 | } |
| 2999 | else |
| 3000 | printf_filtered ("%c", c); |
| 3001 | } |
| 3002 | |
| 3003 | /* Force this output to appear now. */ |
| 3004 | wrap_here (""); |
| 3005 | gdb_flush (gdb_stdout); |
| 3006 | } |
| 3007 | |
| 3008 | \f |
| 3009 | #ifdef TARGET_BYTE_ORDER_SELECTABLE |
| 3010 | |
| 3011 | /* Functions to manipulate the endianness of the target. */ |
| 3012 | |
| 3013 | #ifndef TARGET_BYTE_ORDER_DEFAULT |
| 3014 | #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN |
| 3015 | #endif |
| 3016 | |
| 3017 | int target_byte_order = TARGET_BYTE_ORDER_DEFAULT; |
| 3018 | |
| 3019 | static int target_byte_order_auto = 1; |
| 3020 | |
| 3021 | /* Called if the user enters ``set endian'' without an argument. */ |
| 3022 | static void |
| 3023 | set_endian (args, from_tty) |
| 3024 | char *args; |
| 3025 | int from_tty; |
| 3026 | { |
| 3027 | printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n"); |
| 3028 | show_endian (args, from_tty); |
| 3029 | } |
| 3030 | |
| 3031 | /* Called by ``set endian big''. */ |
| 3032 | static void |
| 3033 | set_endian_big (args, from_tty) |
| 3034 | char *args; |
| 3035 | int from_tty; |
| 3036 | { |
| 3037 | target_byte_order = BIG_ENDIAN; |
| 3038 | target_byte_order_auto = 0; |
| 3039 | } |
| 3040 | |
| 3041 | /* Called by ``set endian little''. */ |
| 3042 | static void |
| 3043 | set_endian_little (args, from_tty) |
| 3044 | char *args; |
| 3045 | int from_tty; |
| 3046 | { |
| 3047 | target_byte_order = LITTLE_ENDIAN; |
| 3048 | target_byte_order_auto = 0; |
| 3049 | } |
| 3050 | |
| 3051 | /* Called by ``set endian auto''. */ |
| 3052 | static void |
| 3053 | set_endian_auto (args, from_tty) |
| 3054 | char *args; |
| 3055 | int from_tty; |
| 3056 | { |
| 3057 | target_byte_order_auto = 1; |
| 3058 | } |
| 3059 | |
| 3060 | /* Called by ``show endian''. */ |
| 3061 | static void |
| 3062 | show_endian (args, from_tty) |
| 3063 | char *args; |
| 3064 | int from_tty; |
| 3065 | { |
| 3066 | const char *msg = |
| 3067 | (target_byte_order_auto |
| 3068 | ? "The target endianness is set automatically (currently %s endian)\n" |
| 3069 | : "The target is assumed to be %s endian\n"); |
| 3070 | printf_unfiltered (msg, TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little"); |
| 3071 | } |
| 3072 | |
| 3073 | #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */ |
| 3074 | |
| 3075 | /* Set the endianness from a BFD. */ |
| 3076 | void |
| 3077 | set_endian_from_file (abfd) |
| 3078 | bfd *abfd; |
| 3079 | { |
| 3080 | #ifdef TARGET_BYTE_ORDER_SELECTABLE |
| 3081 | int want; |
| 3082 | |
| 3083 | if (abfd->xvec->byteorder_big_p) |
| 3084 | want = BIG_ENDIAN; |
| 3085 | else |
| 3086 | want = LITTLE_ENDIAN; |
| 3087 | if (target_byte_order_auto) |
| 3088 | target_byte_order = want; |
| 3089 | else if (target_byte_order != want) |
| 3090 | warning ("%s endian file does not match %s endian target.", |
| 3091 | want == BIG_ENDIAN ? "big" : "little", |
| 3092 | TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little"); |
| 3093 | |
| 3094 | #else /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */ |
| 3095 | |
| 3096 | if (abfd->xvec->byteorder_big_p |
| 3097 | ? TARGET_BYTE_ORDER != BIG_ENDIAN |
| 3098 | : TARGET_BYTE_ORDER == BIG_ENDIAN) |
| 3099 | warning ("%s endian file does not match %s endian target.", |
| 3100 | abfd->xvec->byteorder_big_p ? "big" : "little", |
| 3101 | TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little"); |
| 3102 | |
| 3103 | #endif /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */ |
| 3104 | } |
| 3105 | \f |
| 3106 | /* Functions to manipulate command line editing control variables. */ |
| 3107 | |
| 3108 | /* Number of commands to print in each call to show_commands. */ |
| 3109 | #define Hist_print 10 |
| 3110 | static void |
| 3111 | show_commands (args, from_tty) |
| 3112 | char *args; |
| 3113 | int from_tty; |
| 3114 | { |
| 3115 | /* Index for history commands. Relative to history_base. */ |
| 3116 | int offset; |
| 3117 | |
| 3118 | /* Number of the history entry which we are planning to display next. |
| 3119 | Relative to history_base. */ |
| 3120 | static int num = 0; |
| 3121 | |
| 3122 | /* The first command in the history which doesn't exist (i.e. one more |
| 3123 | than the number of the last command). Relative to history_base. */ |
| 3124 | int hist_len; |
| 3125 | |
| 3126 | extern HIST_ENTRY *history_get PARAMS ((int)); |
| 3127 | |
| 3128 | /* Print out some of the commands from the command history. */ |
| 3129 | /* First determine the length of the history list. */ |
| 3130 | hist_len = history_size; |
| 3131 | for (offset = 0; offset < history_size; offset++) |
| 3132 | { |
| 3133 | if (!history_get (history_base + offset)) |
| 3134 | { |
| 3135 | hist_len = offset; |
| 3136 | break; |
| 3137 | } |
| 3138 | } |
| 3139 | |
| 3140 | if (args) |
| 3141 | { |
| 3142 | if (args[0] == '+' && args[1] == '\0') |
| 3143 | /* "info editing +" should print from the stored position. */ |
| 3144 | ; |
| 3145 | else |
| 3146 | /* "info editing <exp>" should print around command number <exp>. */ |
| 3147 | num = (parse_and_eval_address (args) - history_base) - Hist_print / 2; |
| 3148 | } |
| 3149 | /* "show commands" means print the last Hist_print commands. */ |
| 3150 | else |
| 3151 | { |
| 3152 | num = hist_len - Hist_print; |
| 3153 | } |
| 3154 | |
| 3155 | if (num < 0) |
| 3156 | num = 0; |
| 3157 | |
| 3158 | /* If there are at least Hist_print commands, we want to display the last |
| 3159 | Hist_print rather than, say, the last 6. */ |
| 3160 | if (hist_len - num < Hist_print) |
| 3161 | { |
| 3162 | num = hist_len - Hist_print; |
| 3163 | if (num < 0) |
| 3164 | num = 0; |
| 3165 | } |
| 3166 | |
| 3167 | for (offset = num; offset < num + Hist_print && offset < hist_len; offset++) |
| 3168 | { |
| 3169 | printf_filtered ("%5d %s\n", history_base + offset, |
| 3170 | (history_get (history_base + offset))->line); |
| 3171 | } |
| 3172 | |
| 3173 | /* The next command we want to display is the next one that we haven't |
| 3174 | displayed yet. */ |
| 3175 | num += Hist_print; |
| 3176 | |
| 3177 | /* If the user repeats this command with return, it should do what |
| 3178 | "show commands +" does. This is unnecessary if arg is null, |
| 3179 | because "show commands +" is not useful after "show commands". */ |
| 3180 | if (from_tty && args) |
| 3181 | { |
| 3182 | args[0] = '+'; |
| 3183 | args[1] = '\0'; |
| 3184 | } |
| 3185 | } |
| 3186 | |
| 3187 | /* Called by do_setshow_command. */ |
| 3188 | /* ARGSUSED */ |
| 3189 | static void |
| 3190 | set_history_size_command (args, from_tty, c) |
| 3191 | char *args; |
| 3192 | int from_tty; |
| 3193 | struct cmd_list_element *c; |
| 3194 | { |
| 3195 | if (history_size == INT_MAX) |
| 3196 | unstifle_history (); |
| 3197 | else if (history_size >= 0) |
| 3198 | stifle_history (history_size); |
| 3199 | else |
| 3200 | { |
| 3201 | history_size = INT_MAX; |
| 3202 | error ("History size must be non-negative"); |
| 3203 | } |
| 3204 | } |
| 3205 | |
| 3206 | /* ARGSUSED */ |
| 3207 | static void |
| 3208 | set_history (args, from_tty) |
| 3209 | char *args; |
| 3210 | int from_tty; |
| 3211 | { |
| 3212 | printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n"); |
| 3213 | help_list (sethistlist, "set history ", -1, gdb_stdout); |
| 3214 | } |
| 3215 | |
| 3216 | /* ARGSUSED */ |
| 3217 | static void |
| 3218 | show_history (args, from_tty) |
| 3219 | char *args; |
| 3220 | int from_tty; |
| 3221 | { |
| 3222 | cmd_show_list (showhistlist, from_tty, ""); |
| 3223 | } |
| 3224 | |
| 3225 | int info_verbose = 0; /* Default verbose msgs off */ |
| 3226 | |
| 3227 | /* Called by do_setshow_command. An elaborate joke. */ |
| 3228 | /* ARGSUSED */ |
| 3229 | static void |
| 3230 | set_verbose (args, from_tty, c) |
| 3231 | char *args; |
| 3232 | int from_tty; |
| 3233 | struct cmd_list_element *c; |
| 3234 | { |
| 3235 | char *cmdname = "verbose"; |
| 3236 | struct cmd_list_element *showcmd; |
| 3237 | |
| 3238 | showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1); |
| 3239 | |
| 3240 | if (info_verbose) |
| 3241 | { |
| 3242 | c->doc = "Set verbose printing of informational messages."; |
| 3243 | showcmd->doc = "Show verbose printing of informational messages."; |
| 3244 | } |
| 3245 | else |
| 3246 | { |
| 3247 | c->doc = "Set verbosity."; |
| 3248 | showcmd->doc = "Show verbosity."; |
| 3249 | } |
| 3250 | } |
| 3251 | |
| 3252 | static void |
| 3253 | float_handler (signo) |
| 3254 | int signo; |
| 3255 | { |
| 3256 | /* This message is based on ANSI C, section 4.7. Note that integer |
| 3257 | divide by zero causes this, so "float" is a misnomer. */ |
| 3258 | signal (SIGFPE, float_handler); |
| 3259 | error ("Erroneous arithmetic operation."); |
| 3260 | } |
| 3261 | |
| 3262 | \f |
| 3263 | static void |
| 3264 | init_cmd_lists () |
| 3265 | { |
| 3266 | cmdlist = NULL; |
| 3267 | infolist = NULL; |
| 3268 | enablelist = NULL; |
| 3269 | disablelist = NULL; |
| 3270 | deletelist = NULL; |
| 3271 | enablebreaklist = NULL; |
| 3272 | setlist = NULL; |
| 3273 | unsetlist = NULL; |
| 3274 | showlist = NULL; |
| 3275 | #ifdef TARGET_BYTE_ORDER_SELECTABLE |
| 3276 | endianlist = NULL; |
| 3277 | #endif |
| 3278 | sethistlist = NULL; |
| 3279 | showhistlist = NULL; |
| 3280 | unsethistlist = NULL; |
| 3281 | #if MAINTENANCE_CMDS |
| 3282 | maintenancelist = NULL; |
| 3283 | maintenanceinfolist = NULL; |
| 3284 | maintenanceprintlist = NULL; |
| 3285 | #endif |
| 3286 | setprintlist = NULL; |
| 3287 | showprintlist = NULL; |
| 3288 | setchecklist = NULL; |
| 3289 | showchecklist = NULL; |
| 3290 | } |
| 3291 | |
| 3292 | /* Init the history buffer. Note that we are called after the init file(s) |
| 3293 | * have been read so that the user can change the history file via his |
| 3294 | * .gdbinit file (for instance). The GDBHISTFILE environment variable |
| 3295 | * overrides all of this. |
| 3296 | */ |
| 3297 | |
| 3298 | void |
| 3299 | init_history() |
| 3300 | { |
| 3301 | char *tmpenv; |
| 3302 | |
| 3303 | tmpenv = getenv ("HISTSIZE"); |
| 3304 | if (tmpenv) |
| 3305 | history_size = atoi (tmpenv); |
| 3306 | else if (!history_size) |
| 3307 | history_size = 256; |
| 3308 | |
| 3309 | stifle_history (history_size); |
| 3310 | |
| 3311 | tmpenv = getenv ("GDBHISTFILE"); |
| 3312 | if (tmpenv) |
| 3313 | history_filename = savestring (tmpenv, strlen(tmpenv)); |
| 3314 | else if (!history_filename) { |
| 3315 | /* We include the current directory so that if the user changes |
| 3316 | directories the file written will be the same as the one |
| 3317 | that was read. */ |
| 3318 | history_filename = concat (current_directory, "/.gdb_history", NULL); |
| 3319 | } |
| 3320 | read_history (history_filename); |
| 3321 | } |
| 3322 | |
| 3323 | static void |
| 3324 | init_main () |
| 3325 | { |
| 3326 | struct cmd_list_element *c; |
| 3327 | |
| 3328 | #ifdef TARGET_BYTE_ORDER_SELECTABLE |
| 3329 | |
| 3330 | add_prefix_cmd ("endian", class_support, set_endian, |
| 3331 | "Set endianness of target.", |
| 3332 | &endianlist, "set endian ", 0, &setlist); |
| 3333 | add_cmd ("big", class_support, set_endian_big, |
| 3334 | "Set target as being big endian.", &endianlist); |
| 3335 | add_cmd ("little", class_support, set_endian_little, |
| 3336 | "Set target as being little endian.", &endianlist); |
| 3337 | add_cmd ("auto", class_support, set_endian_auto, |
| 3338 | "Select target endianness automatically.", &endianlist); |
| 3339 | add_cmd ("endian", class_support, show_endian, |
| 3340 | "Show endianness of target.", &showlist); |
| 3341 | |
| 3342 | #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */ |
| 3343 | |
| 3344 | #ifdef DEFAULT_PROMPT |
| 3345 | prompt = savestring (DEFAULT_PROMPT, strlen(DEFAULT_PROMPT)); |
| 3346 | #else |
| 3347 | prompt = savestring ("(gdb) ", 6); |
| 3348 | #endif |
| 3349 | |
| 3350 | /* Set the important stuff up for command editing. */ |
| 3351 | command_editing_p = 1; |
| 3352 | history_expansion_p = 0; |
| 3353 | write_history_p = 0; |
| 3354 | |
| 3355 | /* Setup important stuff for command line editing. */ |
| 3356 | rl_completion_entry_function = (int (*)()) readline_line_completion_function; |
| 3357 | rl_completer_word_break_characters = gdb_completer_word_break_characters; |
| 3358 | rl_completer_quote_characters = gdb_completer_quote_characters; |
| 3359 | rl_readline_name = "gdb"; |
| 3360 | |
| 3361 | /* Define the classes of commands. |
| 3362 | They will appear in the help list in the reverse of this order. */ |
| 3363 | |
| 3364 | add_cmd ("internals", class_maintenance, NO_FUNCTION, |
| 3365 | "Maintenance commands.\n\ |
| 3366 | Some gdb commands are provided just for use by gdb maintainers.\n\ |
| 3367 | These commands are subject to frequent change, and may not be as\n\ |
| 3368 | well documented as user commands.", |
| 3369 | &cmdlist); |
| 3370 | add_cmd ("obscure", class_obscure, NO_FUNCTION, "Obscure features.", &cmdlist); |
| 3371 | add_cmd ("aliases", class_alias, NO_FUNCTION, "Aliases of other commands.", &cmdlist); |
| 3372 | add_cmd ("user-defined", class_user, NO_FUNCTION, "User-defined commands.\n\ |
| 3373 | The commands in this class are those defined by the user.\n\ |
| 3374 | Use the \"define\" command to define a command.", &cmdlist); |
| 3375 | add_cmd ("support", class_support, NO_FUNCTION, "Support facilities.", &cmdlist); |
| 3376 | add_cmd ("status", class_info, NO_FUNCTION, "Status inquiries.", &cmdlist); |
| 3377 | add_cmd ("files", class_files, NO_FUNCTION, "Specifying and examining files.", &cmdlist); |
| 3378 | add_cmd ("breakpoints", class_breakpoint, NO_FUNCTION, "Making program stop at certain points.", &cmdlist); |
| 3379 | add_cmd ("data", class_vars, NO_FUNCTION, "Examining data.", &cmdlist); |
| 3380 | add_cmd ("stack", class_stack, NO_FUNCTION, "Examining the stack.\n\ |
| 3381 | The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\ |
| 3382 | counting from zero for the innermost (currently executing) frame.\n\n\ |
| 3383 | At any time gdb identifies one frame as the \"selected\" frame.\n\ |
| 3384 | Variable lookups are done with respect to the selected frame.\n\ |
| 3385 | When the program being debugged stops, gdb selects the innermost frame.\n\ |
| 3386 | The commands below can be used to select other frames by number or address.", |
| 3387 | &cmdlist); |
| 3388 | add_cmd ("running", class_run, NO_FUNCTION, "Running the program.", &cmdlist); |
| 3389 | |
| 3390 | add_com ("pwd", class_files, pwd_command, |
| 3391 | "Print working directory. This is used for your program as well."); |
| 3392 | c = add_cmd ("cd", class_files, cd_command, |
| 3393 | "Set working directory to DIR for debugger and program being debugged.\n\ |
| 3394 | The change does not take effect for the program being debugged\n\ |
| 3395 | until the next time it is started.", &cmdlist); |
| 3396 | c->completer = filename_completer; |
| 3397 | |
| 3398 | add_show_from_set |
| 3399 | (add_set_cmd ("prompt", class_support, var_string, (char *)&prompt, |
| 3400 | "Set gdb's prompt", |
| 3401 | &setlist), |
| 3402 | &showlist); |
| 3403 | |
| 3404 | add_com ("echo", class_support, echo_command, |
| 3405 | "Print a constant string. Give string as argument.\n\ |
| 3406 | C escape sequences may be used in the argument.\n\ |
| 3407 | No newline is added at the end of the argument;\n\ |
| 3408 | use \"\\n\" if you want a newline to be printed.\n\ |
| 3409 | Since leading and trailing whitespace are ignored in command arguments,\n\ |
| 3410 | if you want to print some you must use \"\\\" before leading whitespace\n\ |
| 3411 | to be printed or after trailing whitespace."); |
| 3412 | add_com ("document", class_support, document_command, |
| 3413 | "Document a user-defined command.\n\ |
| 3414 | Give command name as argument. Give documentation on following lines.\n\ |
| 3415 | End with a line of just \"end\"."); |
| 3416 | add_com ("define", class_support, define_command, |
| 3417 | "Define a new command name. Command name is argument.\n\ |
| 3418 | Definition appears on following lines, one command per line.\n\ |
| 3419 | End with a line of just \"end\".\n\ |
| 3420 | Use the \"document\" command to give documentation for the new command.\n\ |
| 3421 | Commands defined in this way may have up to ten arguments."); |
| 3422 | |
| 3423 | #ifdef __STDC__ |
| 3424 | c = add_cmd ("source", class_support, source_command, |
| 3425 | "Read commands from a file named FILE.\n\ |
| 3426 | Note that the file \"" GDBINIT_FILENAME "\" is read automatically in this way\n\ |
| 3427 | when gdb is started.", &cmdlist); |
| 3428 | #else |
| 3429 | /* Punt file name, we can't help it easily. */ |
| 3430 | c = add_cmd ("source", class_support, source_command, |
| 3431 | "Read commands from a file named FILE.\n\ |
| 3432 | Note that the file \".gdbinit\" is read automatically in this way\n\ |
| 3433 | when gdb is started.", &cmdlist); |
| 3434 | #endif |
| 3435 | c->completer = filename_completer; |
| 3436 | |
| 3437 | add_com ("quit", class_support, quit_command, "Exit gdb."); |
| 3438 | add_com ("help", class_support, help_command, "Print list of commands."); |
| 3439 | add_com_alias ("q", "quit", class_support, 1); |
| 3440 | add_com_alias ("h", "help", class_support, 1); |
| 3441 | |
| 3442 | |
| 3443 | c = add_set_cmd ("verbose", class_support, var_boolean, (char *)&info_verbose, |
| 3444 | "Set ", |
| 3445 | &setlist), |
| 3446 | add_show_from_set (c, &showlist); |
| 3447 | c->function.sfunc = set_verbose; |
| 3448 | set_verbose (NULL, 0, c); |
| 3449 | |
| 3450 | add_show_from_set |
| 3451 | (add_set_cmd ("editing", class_support, var_boolean, (char *)&command_editing_p, |
| 3452 | "Set editing of command lines as they are typed.\n\ |
| 3453 | Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\ |
| 3454 | Without an argument, command line editing is enabled. To edit, use\n\ |
| 3455 | EMACS-like or VI-like commands like control-P or ESC.", &setlist), |
| 3456 | &showlist); |
| 3457 | |
| 3458 | add_prefix_cmd ("history", class_support, set_history, |
| 3459 | "Generic command for setting command history parameters.", |
| 3460 | &sethistlist, "set history ", 0, &setlist); |
| 3461 | add_prefix_cmd ("history", class_support, show_history, |
| 3462 | "Generic command for showing command history parameters.", |
| 3463 | &showhistlist, "show history ", 0, &showlist); |
| 3464 | |
| 3465 | add_show_from_set |
| 3466 | (add_set_cmd ("expansion", no_class, var_boolean, (char *)&history_expansion_p, |
| 3467 | "Set history expansion on command input.\n\ |
| 3468 | Without an argument, history expansion is enabled.", &sethistlist), |
| 3469 | &showhistlist); |
| 3470 | |
| 3471 | add_show_from_set |
| 3472 | (add_set_cmd ("save", no_class, var_boolean, (char *)&write_history_p, |
| 3473 | "Set saving of the history record on exit.\n\ |
| 3474 | Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\ |
| 3475 | Without an argument, saving is enabled.", &sethistlist), |
| 3476 | &showhistlist); |
| 3477 | |
| 3478 | c = add_set_cmd ("size", no_class, var_integer, (char *)&history_size, |
| 3479 | "Set the size of the command history, \n\ |
| 3480 | ie. the number of previous commands to keep a record of.", &sethistlist); |
| 3481 | add_show_from_set (c, &showhistlist); |
| 3482 | c->function.sfunc = set_history_size_command; |
| 3483 | |
| 3484 | add_show_from_set |
| 3485 | (add_set_cmd ("filename", no_class, var_filename, (char *)&history_filename, |
| 3486 | "Set the filename in which to record the command history\n\ |
| 3487 | (the list of previous commands of which a record is kept).", &sethistlist), |
| 3488 | &showhistlist); |
| 3489 | |
| 3490 | add_show_from_set |
| 3491 | (add_set_cmd ("confirm", class_support, var_boolean, |
| 3492 | (char *)&caution, |
| 3493 | "Set whether to confirm potentially dangerous operations.", |
| 3494 | &setlist), |
| 3495 | &showlist); |
| 3496 | |
| 3497 | add_prefix_cmd ("info", class_info, info_command, |
| 3498 | "Generic command for showing things about the program being debugged.", |
| 3499 | &infolist, "info ", 0, &cmdlist); |
| 3500 | add_com_alias ("i", "info", class_info, 1); |
| 3501 | |
| 3502 | add_com ("complete", class_obscure, complete_command, |
| 3503 | "List the completions for the rest of the line as a command."); |
| 3504 | |
| 3505 | add_prefix_cmd ("show", class_info, show_command, |
| 3506 | "Generic command for showing things about the debugger.", |
| 3507 | &showlist, "show ", 0, &cmdlist); |
| 3508 | /* Another way to get at the same thing. */ |
| 3509 | add_info ("set", show_command, "Show all GDB settings."); |
| 3510 | |
| 3511 | add_cmd ("commands", no_class, show_commands, |
| 3512 | "Show the history of commands you typed.\n\ |
| 3513 | You can supply a command number to start with, or a `+' to start after\n\ |
| 3514 | the previous command number shown.", |
| 3515 | &showlist); |
| 3516 | |
| 3517 | add_cmd ("version", no_class, show_version, |
| 3518 | "Show what version of GDB this is.", &showlist); |
| 3519 | |
| 3520 | add_com ("while", class_support, while_command, |
| 3521 | "Execute nested commands WHILE the conditional expression is non zero.\n\ |
| 3522 | The conditional expression must follow the word `while' and must in turn be\n\ |
| 3523 | followed by a new line. The nested commands must be entered one per line,\n\ |
| 3524 | and should be terminated by the word `end'."); |
| 3525 | |
| 3526 | add_com ("if", class_support, if_command, |
| 3527 | "Execute nested commands once IF the conditional expression is non zero.\n\ |
| 3528 | The conditional expression must follow the word `if' and must in turn be\n\ |
| 3529 | followed by a new line. The nested commands must be entered one per line,\n\ |
| 3530 | and should be terminated by the word 'else' or `end'. If an else clause\n\ |
| 3531 | is used, the same rules apply to its nested commands as to the first ones."); |
| 3532 | |
| 3533 | /* If target is open when baud changes, it doesn't take effect until the |
| 3534 | next open (I think, not sure). */ |
| 3535 | add_show_from_set (add_set_cmd ("remotebaud", no_class, |
| 3536 | var_zinteger, (char *)&baud_rate, |
| 3537 | "Set baud rate for remote serial I/O.\n\ |
| 3538 | This value is used to set the speed of the serial port when debugging\n\ |
| 3539 | using remote targets.", &setlist), |
| 3540 | &showlist); |
| 3541 | |
| 3542 | add_show_from_set ( |
| 3543 | add_set_cmd ("remotedebug", no_class, var_zinteger, (char *)&remote_debug, |
| 3544 | "Set debugging of remote protocol.\n\ |
| 3545 | When enabled, each packet sent or received with the remote target\n\ |
| 3546 | is displayed.", &setlist), |
| 3547 | &showlist); |
| 3548 | } |