| 1 | /* Top level stuff for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, |
| 4 | 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, |
| 5 | 2008, 2009 Free Software Foundation, Inc. |
| 6 | |
| 7 | This file is part of GDB. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 3 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "gdbcmd.h" |
| 24 | #include "call-cmds.h" |
| 25 | #include "cli/cli-cmds.h" |
| 26 | #include "cli/cli-script.h" |
| 27 | #include "cli/cli-setshow.h" |
| 28 | #include "cli/cli-decode.h" |
| 29 | #include "symtab.h" |
| 30 | #include "inferior.h" |
| 31 | #include "exceptions.h" |
| 32 | #include <signal.h> |
| 33 | #include "target.h" |
| 34 | #include "breakpoint.h" |
| 35 | #include "gdbtypes.h" |
| 36 | #include "expression.h" |
| 37 | #include "value.h" |
| 38 | #include "language.h" |
| 39 | #include "terminal.h" /* For job_control. */ |
| 40 | #include "annotate.h" |
| 41 | #include "completer.h" |
| 42 | #include "top.h" |
| 43 | #include "version.h" |
| 44 | #include "serial.h" |
| 45 | #include "doublest.h" |
| 46 | #include "gdb_assert.h" |
| 47 | #include "main.h" |
| 48 | #include "event-loop.h" |
| 49 | #include "gdbthread.h" |
| 50 | |
| 51 | /* readline include files */ |
| 52 | #include "readline/readline.h" |
| 53 | #include "readline/history.h" |
| 54 | |
| 55 | /* readline defines this. */ |
| 56 | #undef savestring |
| 57 | |
| 58 | #include <sys/types.h> |
| 59 | |
| 60 | #include "event-top.h" |
| 61 | #include "gdb_string.h" |
| 62 | #include "gdb_stat.h" |
| 63 | #include <ctype.h> |
| 64 | #include "ui-out.h" |
| 65 | #include "cli-out.h" |
| 66 | |
| 67 | /* Default command line prompt. This is overriden in some configs. */ |
| 68 | |
| 69 | #ifndef DEFAULT_PROMPT |
| 70 | #define DEFAULT_PROMPT "(gdb) " |
| 71 | #endif |
| 72 | |
| 73 | /* Initialization file name for gdb. This is overridden in some configs. */ |
| 74 | |
| 75 | #ifndef PATH_MAX |
| 76 | # ifdef FILENAME_MAX |
| 77 | # define PATH_MAX FILENAME_MAX |
| 78 | # else |
| 79 | # define PATH_MAX 512 |
| 80 | # endif |
| 81 | #endif |
| 82 | |
| 83 | #ifndef GDBINIT_FILENAME |
| 84 | #define GDBINIT_FILENAME ".gdbinit" |
| 85 | #endif |
| 86 | char gdbinit[PATH_MAX + 1] = GDBINIT_FILENAME; |
| 87 | |
| 88 | int inhibit_gdbinit = 0; |
| 89 | |
| 90 | /* If nonzero, and GDB has been configured to be able to use windows, |
| 91 | attempt to open them upon startup. */ |
| 92 | |
| 93 | int use_windows = 0; |
| 94 | |
| 95 | extern char lang_frame_mismatch_warn[]; /* language.c */ |
| 96 | |
| 97 | /* Flag for whether we want all the "from_tty" gubbish printed. */ |
| 98 | |
| 99 | int caution = 1; /* Default is yes, sigh. */ |
| 100 | static void |
| 101 | show_caution (struct ui_file *file, int from_tty, |
| 102 | struct cmd_list_element *c, const char *value) |
| 103 | { |
| 104 | fprintf_filtered (file, _("\ |
| 105 | Whether to confirm potentially dangerous operations is %s.\n"), |
| 106 | value); |
| 107 | } |
| 108 | |
| 109 | /* stdio stream that command input is being read from. Set to stdin normally. |
| 110 | Set by source_command to the file we are sourcing. Set to NULL if we are |
| 111 | executing a user-defined command or interacting via a GUI. */ |
| 112 | |
| 113 | FILE *instream; |
| 114 | |
| 115 | /* Flag to indicate whether a user defined command is currently running. */ |
| 116 | |
| 117 | int in_user_command; |
| 118 | |
| 119 | /* Current working directory. */ |
| 120 | |
| 121 | char *current_directory; |
| 122 | |
| 123 | /* The directory name is actually stored here (usually). */ |
| 124 | char gdb_dirbuf[1024]; |
| 125 | |
| 126 | /* Function to call before reading a command, if nonzero. |
| 127 | The function receives two args: an input stream, |
| 128 | and a prompt string. */ |
| 129 | |
| 130 | void (*window_hook) (FILE *, char *); |
| 131 | |
| 132 | int epoch_interface; |
| 133 | int xgdb_verbose; |
| 134 | |
| 135 | /* Buffer used for reading command lines, and the size |
| 136 | allocated for it so far. */ |
| 137 | |
| 138 | char *line; |
| 139 | int linesize = 100; |
| 140 | |
| 141 | /* Nonzero if the current command is modified by "server ". This |
| 142 | affects things like recording into the command history, commands |
| 143 | repeating on RETURN, etc. This is so a user interface (emacs, GUI, |
| 144 | whatever) can issue its own commands and also send along commands |
| 145 | from the user, and have the user not notice that the user interface |
| 146 | is issuing commands too. */ |
| 147 | int server_command; |
| 148 | |
| 149 | /* Baud rate specified for talking to serial target systems. Default |
| 150 | is left as -1, so targets can choose their own defaults. */ |
| 151 | /* FIXME: This means that "show remotebaud" and gr_files_info can print -1 |
| 152 | or (unsigned int)-1. This is a Bad User Interface. */ |
| 153 | |
| 154 | int baud_rate = -1; |
| 155 | |
| 156 | /* Timeout limit for response from target. */ |
| 157 | |
| 158 | /* The default value has been changed many times over the years. It |
| 159 | was originally 5 seconds. But that was thought to be a long time |
| 160 | to sit and wait, so it was changed to 2 seconds. That was thought |
| 161 | to be plenty unless the connection was going through some terminal |
| 162 | server or multiplexer or other form of hairy serial connection. |
| 163 | |
| 164 | In mid-1996, remote_timeout was moved from remote.c to top.c and |
| 165 | it began being used in other remote-* targets. It appears that the |
| 166 | default was changed to 20 seconds at that time, perhaps because the |
| 167 | Renesas E7000 ICE didn't always respond in a timely manner. |
| 168 | |
| 169 | But if 5 seconds is a long time to sit and wait for retransmissions, |
| 170 | 20 seconds is far worse. This demonstrates the difficulty of using |
| 171 | a single variable for all protocol timeouts. |
| 172 | |
| 173 | As remote.c is used much more than remote-e7000.c, it was changed |
| 174 | back to 2 seconds in 1999. */ |
| 175 | |
| 176 | int remote_timeout = 2; |
| 177 | |
| 178 | /* Non-zero tells remote* modules to output debugging info. */ |
| 179 | |
| 180 | int remote_debug = 0; |
| 181 | |
| 182 | /* Sbrk location on entry to main. Used for statistics only. */ |
| 183 | #ifdef HAVE_SBRK |
| 184 | char *lim_at_start; |
| 185 | #endif |
| 186 | |
| 187 | /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */ |
| 188 | |
| 189 | #ifndef STOP_SIGNAL |
| 190 | #ifdef SIGTSTP |
| 191 | #define STOP_SIGNAL SIGTSTP |
| 192 | static void stop_sig (int); |
| 193 | #endif |
| 194 | #endif |
| 195 | |
| 196 | /* Hooks for alternate command interfaces. */ |
| 197 | |
| 198 | /* Called after most modules have been initialized, but before taking users |
| 199 | command file. |
| 200 | |
| 201 | If the UI fails to initialize and it wants GDB to continue |
| 202 | using the default UI, then it should clear this hook before returning. */ |
| 203 | |
| 204 | void (*deprecated_init_ui_hook) (char *argv0); |
| 205 | |
| 206 | /* This hook is called from within gdb's many mini-event loops which could |
| 207 | steal control from a real user interface's event loop. It returns |
| 208 | non-zero if the user is requesting a detach, zero otherwise. */ |
| 209 | |
| 210 | int (*deprecated_ui_loop_hook) (int); |
| 211 | |
| 212 | /* Called instead of command_loop at top level. Can be invoked via |
| 213 | throw_exception(). */ |
| 214 | |
| 215 | void (*deprecated_command_loop_hook) (void); |
| 216 | |
| 217 | |
| 218 | /* Called from print_frame_info to list the line we stopped in. */ |
| 219 | |
| 220 | void (*deprecated_print_frame_info_listing_hook) (struct symtab * s, int line, |
| 221 | int stopline, int noerror); |
| 222 | /* Replaces most of query. */ |
| 223 | |
| 224 | int (*deprecated_query_hook) (const char *, va_list); |
| 225 | |
| 226 | /* Replaces most of warning. */ |
| 227 | |
| 228 | void (*deprecated_warning_hook) (const char *, va_list); |
| 229 | |
| 230 | /* These three functions support getting lines of text from the user. |
| 231 | They are used in sequence. First deprecated_readline_begin_hook is |
| 232 | called with a text string that might be (for example) a message for |
| 233 | the user to type in a sequence of commands to be executed at a |
| 234 | breakpoint. If this function calls back to a GUI, it might take |
| 235 | this opportunity to pop up a text interaction window with this |
| 236 | message. Next, deprecated_readline_hook is called with a prompt |
| 237 | that is emitted prior to collecting the user input. It can be |
| 238 | called multiple times. Finally, deprecated_readline_end_hook is |
| 239 | called to notify the GUI that we are done with the interaction |
| 240 | window and it can close it. */ |
| 241 | |
| 242 | void (*deprecated_readline_begin_hook) (char *, ...); |
| 243 | char *(*deprecated_readline_hook) (char *); |
| 244 | void (*deprecated_readline_end_hook) (void); |
| 245 | |
| 246 | /* Called as appropriate to notify the interface that we have attached |
| 247 | to or detached from an already running process. */ |
| 248 | |
| 249 | void (*deprecated_attach_hook) (void); |
| 250 | void (*deprecated_detach_hook) (void); |
| 251 | |
| 252 | /* Called during long calculations to allow GUI to repair window damage, and to |
| 253 | check for stop buttons, etc... */ |
| 254 | |
| 255 | void (*deprecated_interactive_hook) (void); |
| 256 | |
| 257 | /* Tell the GUI someone changed the register REGNO. -1 means |
| 258 | that the caller does not know which register changed or |
| 259 | that several registers have changed (see value_assign). */ |
| 260 | void (*deprecated_register_changed_hook) (int regno); |
| 261 | |
| 262 | /* Tell the GUI someone changed LEN bytes of memory at ADDR */ |
| 263 | void (*deprecated_memory_changed_hook) (CORE_ADDR addr, int len); |
| 264 | |
| 265 | /* Called when going to wait for the target. Usually allows the GUI to run |
| 266 | while waiting for target events. */ |
| 267 | |
| 268 | ptid_t (*deprecated_target_wait_hook) (ptid_t ptid, |
| 269 | struct target_waitstatus * status); |
| 270 | |
| 271 | /* Used by UI as a wrapper around command execution. May do various things |
| 272 | like enabling/disabling buttons, etc... */ |
| 273 | |
| 274 | void (*deprecated_call_command_hook) (struct cmd_list_element * c, char *cmd, |
| 275 | int from_tty); |
| 276 | |
| 277 | /* Called after a `set' command has finished. Is only run if the |
| 278 | `set' command succeeded. */ |
| 279 | |
| 280 | void (*deprecated_set_hook) (struct cmd_list_element * c); |
| 281 | |
| 282 | /* Called when the current thread changes. Argument is thread id. */ |
| 283 | |
| 284 | void (*deprecated_context_hook) (int id); |
| 285 | |
| 286 | /* Handler for SIGHUP. */ |
| 287 | |
| 288 | #ifdef SIGHUP |
| 289 | /* NOTE 1999-04-29: This function will be static again, once we modify |
| 290 | gdb to use the event loop as the default command loop and we merge |
| 291 | event-top.c into this file, top.c */ |
| 292 | /* static */ int |
| 293 | quit_cover (void *s) |
| 294 | { |
| 295 | caution = 0; /* Throw caution to the wind -- we're exiting. |
| 296 | This prevents asking the user dumb questions. */ |
| 297 | quit_command ((char *) 0, 0); |
| 298 | return 0; |
| 299 | } |
| 300 | #endif /* defined SIGHUP */ |
| 301 | \f |
| 302 | /* Line number we are currently in in a file which is being sourced. */ |
| 303 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
| 304 | gdb to use the event loop as the default command loop and we merge |
| 305 | event-top.c into this file, top.c */ |
| 306 | /* static */ int source_line_number; |
| 307 | |
| 308 | /* Name of the file we are sourcing. */ |
| 309 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
| 310 | gdb to use the event loop as the default command loop and we merge |
| 311 | event-top.c into this file, top.c */ |
| 312 | /* static */ char *source_file_name; |
| 313 | |
| 314 | /* Clean up on error during a "source" command (or execution of a |
| 315 | user-defined command). */ |
| 316 | |
| 317 | void |
| 318 | do_restore_instream_cleanup (void *stream) |
| 319 | { |
| 320 | /* Restore the previous input stream. */ |
| 321 | instream = stream; |
| 322 | } |
| 323 | |
| 324 | /* Read commands from STREAM. */ |
| 325 | void |
| 326 | read_command_file (FILE *stream) |
| 327 | { |
| 328 | struct cleanup *cleanups; |
| 329 | |
| 330 | cleanups = make_cleanup (do_restore_instream_cleanup, instream); |
| 331 | instream = stream; |
| 332 | command_loop (); |
| 333 | do_cleanups (cleanups); |
| 334 | } |
| 335 | \f |
| 336 | void (*pre_init_ui_hook) (void); |
| 337 | |
| 338 | #ifdef __MSDOS__ |
| 339 | void |
| 340 | do_chdir_cleanup (void *old_dir) |
| 341 | { |
| 342 | chdir (old_dir); |
| 343 | xfree (old_dir); |
| 344 | } |
| 345 | #endif |
| 346 | |
| 347 | /* Execute the line P as a command. |
| 348 | Pass FROM_TTY as second argument to the defining function. */ |
| 349 | |
| 350 | /* Execute command P, in the current user context. */ |
| 351 | |
| 352 | void |
| 353 | execute_command (char *p, int from_tty) |
| 354 | { |
| 355 | struct cmd_list_element *c; |
| 356 | enum language flang; |
| 357 | static int warned = 0; |
| 358 | char *line; |
| 359 | long time_at_cmd_start = 0; |
| 360 | #ifdef HAVE_SBRK |
| 361 | long space_at_cmd_start = 0; |
| 362 | #endif |
| 363 | extern int display_time; |
| 364 | extern int display_space; |
| 365 | |
| 366 | if (target_can_async_p ()) |
| 367 | { |
| 368 | time_at_cmd_start = get_run_time (); |
| 369 | |
| 370 | if (display_space) |
| 371 | { |
| 372 | #ifdef HAVE_SBRK |
| 373 | char *lim = (char *) sbrk (0); |
| 374 | space_at_cmd_start = lim - lim_at_start; |
| 375 | #endif |
| 376 | } |
| 377 | } |
| 378 | |
| 379 | free_all_values (); |
| 380 | |
| 381 | /* Force cleanup of any alloca areas if using C alloca instead of |
| 382 | a builtin alloca. */ |
| 383 | alloca (0); |
| 384 | |
| 385 | /* This can happen when command_line_input hits end of file. */ |
| 386 | if (p == NULL) |
| 387 | return; |
| 388 | |
| 389 | target_log_command (p); |
| 390 | |
| 391 | while (*p == ' ' || *p == '\t') |
| 392 | p++; |
| 393 | if (*p) |
| 394 | { |
| 395 | char *arg; |
| 396 | line = p; |
| 397 | |
| 398 | /* If trace-commands is set then this will print this command. */ |
| 399 | print_command_trace (p); |
| 400 | |
| 401 | c = lookup_cmd (&p, cmdlist, "", 0, 1); |
| 402 | |
| 403 | /* If the selected thread has terminated, we allow only a |
| 404 | limited set of commands. */ |
| 405 | if (target_can_async_p () |
| 406 | && is_exited (inferior_ptid) |
| 407 | && !get_cmd_no_selected_thread_ok (c)) |
| 408 | error (_("\ |
| 409 | Cannot execute this command without a live selected thread. See `help thread'.")); |
| 410 | |
| 411 | /* Pass null arg rather than an empty one. */ |
| 412 | arg = *p ? p : 0; |
| 413 | |
| 414 | /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy |
| 415 | while the is_complete_command(cfunc) test is just plain |
| 416 | bogus. They should both be replaced by a test of the form |
| 417 | c->strip_trailing_white_space_p. */ |
| 418 | /* NOTE: cagney/2002-02-02: The function.cfunc in the below |
| 419 | can't be replaced with func. This is because it is the |
| 420 | cfunc, and not the func, that has the value that the |
| 421 | is_complete_command hack is testing for. */ |
| 422 | /* Clear off trailing whitespace, except for set and complete |
| 423 | command. */ |
| 424 | if (arg |
| 425 | && c->type != set_cmd |
| 426 | && !is_complete_command (c)) |
| 427 | { |
| 428 | p = arg + strlen (arg) - 1; |
| 429 | while (p >= arg && (*p == ' ' || *p == '\t')) |
| 430 | p--; |
| 431 | *(p + 1) = '\0'; |
| 432 | } |
| 433 | |
| 434 | /* If this command has been pre-hooked, run the hook first. */ |
| 435 | execute_cmd_pre_hook (c); |
| 436 | |
| 437 | if (c->flags & DEPRECATED_WARN_USER) |
| 438 | deprecated_cmd_warning (&line); |
| 439 | |
| 440 | if (c->class == class_user) |
| 441 | execute_user_command (c, arg); |
| 442 | else if (c->type == set_cmd || c->type == show_cmd) |
| 443 | do_setshow_command (arg, from_tty & caution, c); |
| 444 | else if (!cmd_func_p (c)) |
| 445 | error (_("That is not a command, just a help topic.")); |
| 446 | else if (deprecated_call_command_hook) |
| 447 | deprecated_call_command_hook (c, arg, from_tty & caution); |
| 448 | else |
| 449 | cmd_func (c, arg, from_tty & caution); |
| 450 | |
| 451 | /* If this command has been post-hooked, run the hook last. */ |
| 452 | execute_cmd_post_hook (c); |
| 453 | |
| 454 | } |
| 455 | |
| 456 | /* Tell the user if the language has changed (except first time). */ |
| 457 | if (current_language != expected_language) |
| 458 | { |
| 459 | if (language_mode == language_mode_auto) |
| 460 | { |
| 461 | language_info (1); /* Print what changed. */ |
| 462 | } |
| 463 | warned = 0; |
| 464 | } |
| 465 | |
| 466 | /* Warn the user if the working language does not match the |
| 467 | language of the current frame. Only warn the user if we are |
| 468 | actually running the program, i.e. there is a stack. */ |
| 469 | /* FIXME: This should be cacheing the frame and only running when |
| 470 | the frame changes. */ |
| 471 | |
| 472 | if (target_has_stack && is_stopped (inferior_ptid)) |
| 473 | { |
| 474 | flang = get_frame_language (); |
| 475 | if (!warned |
| 476 | && flang != language_unknown |
| 477 | && flang != current_language->la_language) |
| 478 | { |
| 479 | printf_filtered ("%s\n", lang_frame_mismatch_warn); |
| 480 | warned = 1; |
| 481 | } |
| 482 | } |
| 483 | } |
| 484 | |
| 485 | /* Read commands from `instream' and execute them |
| 486 | until end of file or error reading instream. */ |
| 487 | |
| 488 | void |
| 489 | command_loop (void) |
| 490 | { |
| 491 | struct cleanup *old_chain; |
| 492 | char *command; |
| 493 | int stdin_is_tty = ISATTY (stdin); |
| 494 | long time_at_cmd_start; |
| 495 | #ifdef HAVE_SBRK |
| 496 | long space_at_cmd_start = 0; |
| 497 | #endif |
| 498 | extern int display_time; |
| 499 | extern int display_space; |
| 500 | |
| 501 | while (instream && !feof (instream)) |
| 502 | { |
| 503 | if (window_hook && instream == stdin) |
| 504 | (*window_hook) (instream, get_prompt ()); |
| 505 | |
| 506 | quit_flag = 0; |
| 507 | if (instream == stdin && stdin_is_tty) |
| 508 | reinitialize_more_filter (); |
| 509 | old_chain = make_cleanup (null_cleanup, 0); |
| 510 | |
| 511 | /* Get a command-line. This calls the readline package. */ |
| 512 | command = command_line_input (instream == stdin ? |
| 513 | get_prompt () : (char *) NULL, |
| 514 | instream == stdin, "prompt"); |
| 515 | if (command == 0) |
| 516 | return; |
| 517 | |
| 518 | time_at_cmd_start = get_run_time (); |
| 519 | |
| 520 | if (display_space) |
| 521 | { |
| 522 | #ifdef HAVE_SBRK |
| 523 | char *lim = (char *) sbrk (0); |
| 524 | space_at_cmd_start = lim - lim_at_start; |
| 525 | #endif |
| 526 | } |
| 527 | |
| 528 | execute_command (command, instream == stdin); |
| 529 | |
| 530 | /* Do any commands attached to breakpoint we are stopped at. */ |
| 531 | bpstat_do_actions (); |
| 532 | |
| 533 | do_cleanups (old_chain); |
| 534 | |
| 535 | if (display_time) |
| 536 | { |
| 537 | long cmd_time = get_run_time () - time_at_cmd_start; |
| 538 | |
| 539 | printf_unfiltered (_("Command execution time: %ld.%06ld\n"), |
| 540 | cmd_time / 1000000, cmd_time % 1000000); |
| 541 | } |
| 542 | |
| 543 | if (display_space) |
| 544 | { |
| 545 | #ifdef HAVE_SBRK |
| 546 | char *lim = (char *) sbrk (0); |
| 547 | long space_now = lim - lim_at_start; |
| 548 | long space_diff = space_now - space_at_cmd_start; |
| 549 | |
| 550 | printf_unfiltered (_("Space used: %ld (%s%ld for this command)\n"), |
| 551 | space_now, |
| 552 | (space_diff >= 0 ? "+" : ""), |
| 553 | space_diff); |
| 554 | #endif |
| 555 | } |
| 556 | } |
| 557 | } |
| 558 | \f |
| 559 | /* Commands call this if they do not want to be repeated by null lines. */ |
| 560 | |
| 561 | void |
| 562 | dont_repeat (void) |
| 563 | { |
| 564 | if (server_command) |
| 565 | return; |
| 566 | |
| 567 | /* If we aren't reading from standard input, we are saving the last |
| 568 | thing read from stdin in line and don't want to delete it. Null lines |
| 569 | won't repeat here in any case. */ |
| 570 | if (instream == stdin) |
| 571 | *line = 0; |
| 572 | } |
| 573 | \f |
| 574 | /* Read a line from the stream "instream" without command line editing. |
| 575 | |
| 576 | It prints PROMPT_ARG once at the start. |
| 577 | Action is compatible with "readline", e.g. space for the result is |
| 578 | malloc'd and should be freed by the caller. |
| 579 | |
| 580 | A NULL return means end of file. */ |
| 581 | char * |
| 582 | gdb_readline (char *prompt_arg) |
| 583 | { |
| 584 | int c; |
| 585 | char *result; |
| 586 | int input_index = 0; |
| 587 | int result_size = 80; |
| 588 | |
| 589 | if (prompt_arg) |
| 590 | { |
| 591 | /* Don't use a _filtered function here. It causes the assumed |
| 592 | character position to be off, since the newline we read from |
| 593 | the user is not accounted for. */ |
| 594 | fputs_unfiltered (prompt_arg, gdb_stdout); |
| 595 | gdb_flush (gdb_stdout); |
| 596 | } |
| 597 | |
| 598 | result = (char *) xmalloc (result_size); |
| 599 | |
| 600 | while (1) |
| 601 | { |
| 602 | /* Read from stdin if we are executing a user defined command. |
| 603 | This is the right thing for prompt_for_continue, at least. */ |
| 604 | c = fgetc (instream ? instream : stdin); |
| 605 | |
| 606 | if (c == EOF) |
| 607 | { |
| 608 | if (input_index > 0) |
| 609 | /* The last line does not end with a newline. Return it, and |
| 610 | if we are called again fgetc will still return EOF and |
| 611 | we'll return NULL then. */ |
| 612 | break; |
| 613 | xfree (result); |
| 614 | return NULL; |
| 615 | } |
| 616 | |
| 617 | if (c == '\n') |
| 618 | { |
| 619 | if (input_index > 0 && result[input_index - 1] == '\r') |
| 620 | input_index--; |
| 621 | break; |
| 622 | } |
| 623 | |
| 624 | result[input_index++] = c; |
| 625 | while (input_index >= result_size) |
| 626 | { |
| 627 | result_size *= 2; |
| 628 | result = (char *) xrealloc (result, result_size); |
| 629 | } |
| 630 | } |
| 631 | |
| 632 | result[input_index++] = '\0'; |
| 633 | return result; |
| 634 | } |
| 635 | |
| 636 | /* Variables which control command line editing and history |
| 637 | substitution. These variables are given default values at the end |
| 638 | of this file. */ |
| 639 | static int command_editing_p; |
| 640 | |
| 641 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
| 642 | gdb to use the event loop as the default command loop and we merge |
| 643 | event-top.c into this file, top.c */ |
| 644 | |
| 645 | /* static */ int history_expansion_p; |
| 646 | |
| 647 | static int write_history_p; |
| 648 | static void |
| 649 | show_write_history_p (struct ui_file *file, int from_tty, |
| 650 | struct cmd_list_element *c, const char *value) |
| 651 | { |
| 652 | fprintf_filtered (file, _("Saving of the history record on exit is %s.\n"), |
| 653 | value); |
| 654 | } |
| 655 | |
| 656 | static int history_size; |
| 657 | static void |
| 658 | show_history_size (struct ui_file *file, int from_tty, |
| 659 | struct cmd_list_element *c, const char *value) |
| 660 | { |
| 661 | fprintf_filtered (file, _("The size of the command history is %s.\n"), |
| 662 | value); |
| 663 | } |
| 664 | |
| 665 | static char *history_filename; |
| 666 | static void |
| 667 | show_history_filename (struct ui_file *file, int from_tty, |
| 668 | struct cmd_list_element *c, const char *value) |
| 669 | { |
| 670 | fprintf_filtered (file, _("\ |
| 671 | The filename in which to record the command history is \"%s\".\n"), |
| 672 | value); |
| 673 | } |
| 674 | |
| 675 | /* This is like readline(), but it has some gdb-specific behavior. |
| 676 | gdb may want readline in both the synchronous and async modes during |
| 677 | a single gdb invocation. At the ordinary top-level prompt we might |
| 678 | be using the async readline. That means we can't use |
| 679 | rl_pre_input_hook, since it doesn't work properly in async mode. |
| 680 | However, for a secondary prompt (" >", such as occurs during a |
| 681 | `define'), gdb wants a synchronous response. |
| 682 | |
| 683 | We used to call readline() directly, running it in synchronous |
| 684 | mode. But mixing modes this way is not supported, and as of |
| 685 | readline 5.x it no longer works; the arrow keys come unbound during |
| 686 | the synchronous call. So we make a nested call into the event |
| 687 | loop. That's what gdb_readline_wrapper is for. */ |
| 688 | |
| 689 | /* A flag set as soon as gdb_readline_wrapper_line is called; we can't |
| 690 | rely on gdb_readline_wrapper_result, which might still be NULL if |
| 691 | the user types Control-D for EOF. */ |
| 692 | static int gdb_readline_wrapper_done; |
| 693 | |
| 694 | /* The result of the current call to gdb_readline_wrapper, once a newline |
| 695 | is seen. */ |
| 696 | static char *gdb_readline_wrapper_result; |
| 697 | |
| 698 | /* Any intercepted hook. Operate-and-get-next sets this, expecting it |
| 699 | to be called after the newline is processed (which will redisplay |
| 700 | the prompt). But in gdb_readline_wrapper we will not get a new |
| 701 | prompt until the next call, or until we return to the event loop. |
| 702 | So we disable this hook around the newline and restore it before we |
| 703 | return. */ |
| 704 | static void (*saved_after_char_processing_hook) (void); |
| 705 | |
| 706 | /* This function is called when readline has seen a complete line of |
| 707 | text. */ |
| 708 | |
| 709 | static void |
| 710 | gdb_readline_wrapper_line (char *line) |
| 711 | { |
| 712 | gdb_assert (!gdb_readline_wrapper_done); |
| 713 | gdb_readline_wrapper_result = line; |
| 714 | gdb_readline_wrapper_done = 1; |
| 715 | |
| 716 | /* Prevent operate-and-get-next from acting too early. */ |
| 717 | saved_after_char_processing_hook = after_char_processing_hook; |
| 718 | after_char_processing_hook = NULL; |
| 719 | |
| 720 | /* Prevent parts of the prompt from being redisplayed if annotations |
| 721 | are enabled, and readline's state getting out of sync. */ |
| 722 | if (async_command_editing_p) |
| 723 | rl_callback_handler_remove (); |
| 724 | } |
| 725 | |
| 726 | struct gdb_readline_wrapper_cleanup |
| 727 | { |
| 728 | void (*handler_orig) (char *); |
| 729 | int already_prompted_orig; |
| 730 | }; |
| 731 | |
| 732 | static void |
| 733 | gdb_readline_wrapper_cleanup (void *arg) |
| 734 | { |
| 735 | struct gdb_readline_wrapper_cleanup *cleanup = arg; |
| 736 | |
| 737 | rl_already_prompted = cleanup->already_prompted_orig; |
| 738 | |
| 739 | gdb_assert (input_handler == gdb_readline_wrapper_line); |
| 740 | input_handler = cleanup->handler_orig; |
| 741 | gdb_readline_wrapper_result = NULL; |
| 742 | gdb_readline_wrapper_done = 0; |
| 743 | |
| 744 | after_char_processing_hook = saved_after_char_processing_hook; |
| 745 | saved_after_char_processing_hook = NULL; |
| 746 | |
| 747 | xfree (cleanup); |
| 748 | } |
| 749 | |
| 750 | char * |
| 751 | gdb_readline_wrapper (char *prompt) |
| 752 | { |
| 753 | struct cleanup *back_to; |
| 754 | struct gdb_readline_wrapper_cleanup *cleanup; |
| 755 | char *retval; |
| 756 | |
| 757 | cleanup = xmalloc (sizeof (*cleanup)); |
| 758 | cleanup->handler_orig = input_handler; |
| 759 | input_handler = gdb_readline_wrapper_line; |
| 760 | |
| 761 | cleanup->already_prompted_orig = rl_already_prompted; |
| 762 | |
| 763 | back_to = make_cleanup (gdb_readline_wrapper_cleanup, cleanup); |
| 764 | |
| 765 | /* Display our prompt and prevent double prompt display. */ |
| 766 | display_gdb_prompt (prompt); |
| 767 | rl_already_prompted = 1; |
| 768 | |
| 769 | if (after_char_processing_hook) |
| 770 | (*after_char_processing_hook) (); |
| 771 | gdb_assert (after_char_processing_hook == NULL); |
| 772 | |
| 773 | /* gdb_do_one_event argument is unused. */ |
| 774 | while (gdb_do_one_event (NULL) >= 0) |
| 775 | if (gdb_readline_wrapper_done) |
| 776 | break; |
| 777 | |
| 778 | retval = gdb_readline_wrapper_result; |
| 779 | do_cleanups (back_to); |
| 780 | return retval; |
| 781 | } |
| 782 | |
| 783 | \f |
| 784 | #ifdef STOP_SIGNAL |
| 785 | static void |
| 786 | stop_sig (int signo) |
| 787 | { |
| 788 | #if STOP_SIGNAL == SIGTSTP |
| 789 | signal (SIGTSTP, SIG_DFL); |
| 790 | #if HAVE_SIGPROCMASK |
| 791 | { |
| 792 | sigset_t zero; |
| 793 | |
| 794 | sigemptyset (&zero); |
| 795 | sigprocmask (SIG_SETMASK, &zero, 0); |
| 796 | } |
| 797 | #elif HAVE_SIGSETMASK |
| 798 | sigsetmask (0); |
| 799 | #endif |
| 800 | kill (getpid (), SIGTSTP); |
| 801 | signal (SIGTSTP, stop_sig); |
| 802 | #else |
| 803 | signal (STOP_SIGNAL, stop_sig); |
| 804 | #endif |
| 805 | printf_unfiltered ("%s", get_prompt ()); |
| 806 | gdb_flush (gdb_stdout); |
| 807 | |
| 808 | /* Forget about any previous command -- null line now will do nothing. */ |
| 809 | dont_repeat (); |
| 810 | } |
| 811 | #endif /* STOP_SIGNAL */ |
| 812 | |
| 813 | /* Initialize signal handlers. */ |
| 814 | static void |
| 815 | float_handler (int signo) |
| 816 | { |
| 817 | /* This message is based on ANSI C, section 4.7. Note that integer |
| 818 | divide by zero causes this, so "float" is a misnomer. */ |
| 819 | signal (SIGFPE, float_handler); |
| 820 | error (_("Erroneous arithmetic operation.")); |
| 821 | } |
| 822 | |
| 823 | static void |
| 824 | do_nothing (int signo) |
| 825 | { |
| 826 | /* Under System V the default disposition of a signal is reinstated after |
| 827 | the signal is caught and delivered to an application process. On such |
| 828 | systems one must restore the replacement signal handler if one wishes |
| 829 | to continue handling the signal in one's program. On BSD systems this |
| 830 | is not needed but it is harmless, and it simplifies the code to just do |
| 831 | it unconditionally. */ |
| 832 | signal (signo, do_nothing); |
| 833 | } |
| 834 | |
| 835 | /* The current saved history number from operate-and-get-next. |
| 836 | This is -1 if not valid. */ |
| 837 | static int operate_saved_history = -1; |
| 838 | |
| 839 | /* This is put on the appropriate hook and helps operate-and-get-next |
| 840 | do its work. */ |
| 841 | static void |
| 842 | gdb_rl_operate_and_get_next_completion (void) |
| 843 | { |
| 844 | int delta = where_history () - operate_saved_history; |
| 845 | /* The `key' argument to rl_get_previous_history is ignored. */ |
| 846 | rl_get_previous_history (delta, 0); |
| 847 | operate_saved_history = -1; |
| 848 | |
| 849 | /* readline doesn't automatically update the display for us. */ |
| 850 | rl_redisplay (); |
| 851 | |
| 852 | after_char_processing_hook = NULL; |
| 853 | rl_pre_input_hook = NULL; |
| 854 | } |
| 855 | |
| 856 | /* This is a gdb-local readline command handler. It accepts the |
| 857 | current command line (like RET does) and, if this command was taken |
| 858 | from the history, arranges for the next command in the history to |
| 859 | appear on the command line when the prompt returns. |
| 860 | We ignore the arguments. */ |
| 861 | static int |
| 862 | gdb_rl_operate_and_get_next (int count, int key) |
| 863 | { |
| 864 | int where; |
| 865 | |
| 866 | /* Use the async hook. */ |
| 867 | after_char_processing_hook = gdb_rl_operate_and_get_next_completion; |
| 868 | |
| 869 | /* Find the current line, and find the next line to use. */ |
| 870 | where = where_history(); |
| 871 | |
| 872 | /* FIXME: kettenis/20020817: max_input_history is renamed into |
| 873 | history_max_entries in readline-4.2. When we do a new readline |
| 874 | import, we should probably change it here too, even though |
| 875 | readline maintains backwards compatibility for now by still |
| 876 | defining max_input_history. */ |
| 877 | if ((history_is_stifled () && (history_length >= max_input_history)) || |
| 878 | (where >= history_length - 1)) |
| 879 | operate_saved_history = where; |
| 880 | else |
| 881 | operate_saved_history = where + 1; |
| 882 | |
| 883 | return rl_newline (1, key); |
| 884 | } |
| 885 | \f |
| 886 | /* Read one line from the command input stream `instream' |
| 887 | into the local static buffer `linebuffer' (whose current length |
| 888 | is `linelength'). |
| 889 | The buffer is made bigger as necessary. |
| 890 | Returns the address of the start of the line. |
| 891 | |
| 892 | NULL is returned for end of file. |
| 893 | |
| 894 | *If* the instream == stdin & stdin is a terminal, the line read |
| 895 | is copied into the file line saver (global var char *line, |
| 896 | length linesize) so that it can be duplicated. |
| 897 | |
| 898 | This routine either uses fancy command line editing or |
| 899 | simple input as the user has requested. */ |
| 900 | |
| 901 | char * |
| 902 | command_line_input (char *prompt_arg, int repeat, char *annotation_suffix) |
| 903 | { |
| 904 | static char *linebuffer = 0; |
| 905 | static unsigned linelength = 0; |
| 906 | char *p; |
| 907 | char *p1; |
| 908 | char *rl; |
| 909 | char *local_prompt = prompt_arg; |
| 910 | char *nline; |
| 911 | char got_eof = 0; |
| 912 | |
| 913 | /* The annotation suffix must be non-NULL. */ |
| 914 | if (annotation_suffix == NULL) |
| 915 | annotation_suffix = ""; |
| 916 | |
| 917 | if (annotation_level > 1 && instream == stdin) |
| 918 | { |
| 919 | local_prompt = alloca ((prompt_arg == NULL ? 0 : strlen (prompt_arg)) |
| 920 | + strlen (annotation_suffix) + 40); |
| 921 | if (prompt_arg == NULL) |
| 922 | local_prompt[0] = '\0'; |
| 923 | else |
| 924 | strcpy (local_prompt, prompt_arg); |
| 925 | strcat (local_prompt, "\n\032\032"); |
| 926 | strcat (local_prompt, annotation_suffix); |
| 927 | strcat (local_prompt, "\n"); |
| 928 | } |
| 929 | |
| 930 | if (linebuffer == 0) |
| 931 | { |
| 932 | linelength = 80; |
| 933 | linebuffer = (char *) xmalloc (linelength); |
| 934 | } |
| 935 | |
| 936 | p = linebuffer; |
| 937 | |
| 938 | /* Control-C quits instantly if typed while in this loop |
| 939 | since it should not wait until the user types a newline. */ |
| 940 | immediate_quit++; |
| 941 | #ifdef STOP_SIGNAL |
| 942 | if (job_control) |
| 943 | signal (STOP_SIGNAL, handle_stop_sig); |
| 944 | #endif |
| 945 | |
| 946 | while (1) |
| 947 | { |
| 948 | /* Make sure that all output has been output. Some machines may let |
| 949 | you get away with leaving out some of the gdb_flush, but not all. */ |
| 950 | wrap_here (""); |
| 951 | gdb_flush (gdb_stdout); |
| 952 | gdb_flush (gdb_stderr); |
| 953 | |
| 954 | if (source_file_name != NULL) |
| 955 | ++source_line_number; |
| 956 | |
| 957 | if (annotation_level > 1 && instream == stdin) |
| 958 | { |
| 959 | puts_unfiltered ("\n\032\032pre-"); |
| 960 | puts_unfiltered (annotation_suffix); |
| 961 | puts_unfiltered ("\n"); |
| 962 | } |
| 963 | |
| 964 | /* Don't use fancy stuff if not talking to stdin. */ |
| 965 | if (deprecated_readline_hook && input_from_terminal_p ()) |
| 966 | { |
| 967 | rl = (*deprecated_readline_hook) (local_prompt); |
| 968 | } |
| 969 | else if (command_editing_p && input_from_terminal_p ()) |
| 970 | { |
| 971 | rl = gdb_readline_wrapper (local_prompt); |
| 972 | } |
| 973 | else |
| 974 | { |
| 975 | rl = gdb_readline (local_prompt); |
| 976 | } |
| 977 | |
| 978 | if (annotation_level > 1 && instream == stdin) |
| 979 | { |
| 980 | puts_unfiltered ("\n\032\032post-"); |
| 981 | puts_unfiltered (annotation_suffix); |
| 982 | puts_unfiltered ("\n"); |
| 983 | } |
| 984 | |
| 985 | if (!rl || rl == (char *) EOF) |
| 986 | { |
| 987 | got_eof = 1; |
| 988 | break; |
| 989 | } |
| 990 | if (strlen (rl) + 1 + (p - linebuffer) > linelength) |
| 991 | { |
| 992 | linelength = strlen (rl) + 1 + (p - linebuffer); |
| 993 | nline = (char *) xrealloc (linebuffer, linelength); |
| 994 | p += nline - linebuffer; |
| 995 | linebuffer = nline; |
| 996 | } |
| 997 | p1 = rl; |
| 998 | /* Copy line. Don't copy null at end. (Leaves line alone |
| 999 | if this was just a newline) */ |
| 1000 | while (*p1) |
| 1001 | *p++ = *p1++; |
| 1002 | |
| 1003 | xfree (rl); /* Allocated in readline. */ |
| 1004 | |
| 1005 | if (p == linebuffer || *(p - 1) != '\\') |
| 1006 | break; |
| 1007 | |
| 1008 | p--; /* Put on top of '\'. */ |
| 1009 | local_prompt = (char *) 0; |
| 1010 | } |
| 1011 | |
| 1012 | #ifdef STOP_SIGNAL |
| 1013 | if (job_control) |
| 1014 | signal (STOP_SIGNAL, SIG_DFL); |
| 1015 | #endif |
| 1016 | immediate_quit--; |
| 1017 | |
| 1018 | if (got_eof) |
| 1019 | return NULL; |
| 1020 | |
| 1021 | #define SERVER_COMMAND_LENGTH 7 |
| 1022 | server_command = |
| 1023 | (p - linebuffer > SERVER_COMMAND_LENGTH) |
| 1024 | && strncmp (linebuffer, "server ", SERVER_COMMAND_LENGTH) == 0; |
| 1025 | if (server_command) |
| 1026 | { |
| 1027 | /* Note that we don't set `line'. Between this and the check in |
| 1028 | dont_repeat, this insures that repeating will still do the |
| 1029 | right thing. */ |
| 1030 | *p = '\0'; |
| 1031 | return linebuffer + SERVER_COMMAND_LENGTH; |
| 1032 | } |
| 1033 | |
| 1034 | /* Do history expansion if that is wished. */ |
| 1035 | if (history_expansion_p && instream == stdin |
| 1036 | && ISATTY (instream)) |
| 1037 | { |
| 1038 | char *history_value; |
| 1039 | int expanded; |
| 1040 | |
| 1041 | *p = '\0'; /* Insert null now. */ |
| 1042 | expanded = history_expand (linebuffer, &history_value); |
| 1043 | if (expanded) |
| 1044 | { |
| 1045 | /* Print the changes. */ |
| 1046 | printf_unfiltered ("%s\n", history_value); |
| 1047 | |
| 1048 | /* If there was an error, call this function again. */ |
| 1049 | if (expanded < 0) |
| 1050 | { |
| 1051 | xfree (history_value); |
| 1052 | return command_line_input (prompt_arg, repeat, annotation_suffix); |
| 1053 | } |
| 1054 | if (strlen (history_value) > linelength) |
| 1055 | { |
| 1056 | linelength = strlen (history_value) + 1; |
| 1057 | linebuffer = (char *) xrealloc (linebuffer, linelength); |
| 1058 | } |
| 1059 | strcpy (linebuffer, history_value); |
| 1060 | p = linebuffer + strlen (linebuffer); |
| 1061 | } |
| 1062 | xfree (history_value); |
| 1063 | } |
| 1064 | |
| 1065 | /* If we just got an empty line, and that is supposed |
| 1066 | to repeat the previous command, return the value in the |
| 1067 | global buffer. */ |
| 1068 | if (repeat && p == linebuffer) |
| 1069 | return line; |
| 1070 | for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++); |
| 1071 | if (repeat && !*p1) |
| 1072 | return line; |
| 1073 | |
| 1074 | *p = 0; |
| 1075 | |
| 1076 | /* Add line to history if appropriate. */ |
| 1077 | if (instream == stdin |
| 1078 | && ISATTY (stdin) && *linebuffer) |
| 1079 | add_history (linebuffer); |
| 1080 | |
| 1081 | /* Note: lines consisting solely of comments are added to the command |
| 1082 | history. This is useful when you type a command, and then |
| 1083 | realize you don't want to execute it quite yet. You can comment |
| 1084 | out the command and then later fetch it from the value history |
| 1085 | and remove the '#'. The kill ring is probably better, but some |
| 1086 | people are in the habit of commenting things out. */ |
| 1087 | if (*p1 == '#') |
| 1088 | *p1 = '\0'; /* Found a comment. */ |
| 1089 | |
| 1090 | /* Save into global buffer if appropriate. */ |
| 1091 | if (repeat) |
| 1092 | { |
| 1093 | if (linelength > linesize) |
| 1094 | { |
| 1095 | line = xrealloc (line, linelength); |
| 1096 | linesize = linelength; |
| 1097 | } |
| 1098 | strcpy (line, linebuffer); |
| 1099 | return line; |
| 1100 | } |
| 1101 | |
| 1102 | return linebuffer; |
| 1103 | } |
| 1104 | \f |
| 1105 | /* Print the GDB banner. */ |
| 1106 | void |
| 1107 | print_gdb_version (struct ui_file *stream) |
| 1108 | { |
| 1109 | /* From GNU coding standards, first line is meant to be easy for a |
| 1110 | program to parse, and is just canonical program name and version |
| 1111 | number, which starts after last space. */ |
| 1112 | |
| 1113 | fprintf_filtered (stream, "GNU gdb %s%s\n", PKGVERSION, version); |
| 1114 | |
| 1115 | /* Second line is a copyright notice. */ |
| 1116 | |
| 1117 | fprintf_filtered (stream, "Copyright (C) 2009 Free Software Foundation, Inc.\n"); |
| 1118 | |
| 1119 | /* Following the copyright is a brief statement that the program is |
| 1120 | free software, that users are free to copy and change it on |
| 1121 | certain conditions, that it is covered by the GNU GPL, and that |
| 1122 | there is no warranty. */ |
| 1123 | |
| 1124 | fprintf_filtered (stream, "\ |
| 1125 | License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n\ |
| 1126 | This is free software: you are free to change and redistribute it.\n\ |
| 1127 | There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\ |
| 1128 | and \"show warranty\" for details.\n"); |
| 1129 | |
| 1130 | /* After the required info we print the configuration information. */ |
| 1131 | |
| 1132 | fprintf_filtered (stream, "This GDB was configured as \""); |
| 1133 | if (strcmp (host_name, target_name) != 0) |
| 1134 | { |
| 1135 | fprintf_filtered (stream, "--host=%s --target=%s", host_name, target_name); |
| 1136 | } |
| 1137 | else |
| 1138 | { |
| 1139 | fprintf_filtered (stream, "%s", host_name); |
| 1140 | } |
| 1141 | fprintf_filtered (stream, "\"."); |
| 1142 | |
| 1143 | if (REPORT_BUGS_TO[0]) |
| 1144 | { |
| 1145 | fprintf_filtered (stream, |
| 1146 | _("\nFor bug reporting instructions, please see:\n")); |
| 1147 | fprintf_filtered (stream, "%s.", REPORT_BUGS_TO); |
| 1148 | } |
| 1149 | } |
| 1150 | \f |
| 1151 | /* get_prompt: access method for the GDB prompt string. */ |
| 1152 | |
| 1153 | char * |
| 1154 | get_prompt (void) |
| 1155 | { |
| 1156 | return PROMPT (0); |
| 1157 | } |
| 1158 | |
| 1159 | void |
| 1160 | set_prompt (char *s) |
| 1161 | { |
| 1162 | /* ??rehrauer: I don't know why this fails, since it looks as though |
| 1163 | assignments to prompt are wrapped in calls to savestring... |
| 1164 | if (prompt != NULL) |
| 1165 | xfree (prompt); |
| 1166 | */ |
| 1167 | PROMPT (0) = savestring (s, strlen (s)); |
| 1168 | } |
| 1169 | \f |
| 1170 | |
| 1171 | /* If necessary, make the user confirm that we should quit. Return |
| 1172 | non-zero if we should quit, zero if we shouldn't. */ |
| 1173 | |
| 1174 | int |
| 1175 | quit_confirm (void) |
| 1176 | { |
| 1177 | if (! ptid_equal (inferior_ptid, null_ptid) && target_has_execution) |
| 1178 | { |
| 1179 | char *s; |
| 1180 | struct inferior *inf = current_inferior (); |
| 1181 | |
| 1182 | /* This is something of a hack. But there's no reliable way to |
| 1183 | see if a GUI is running. The `use_windows' variable doesn't |
| 1184 | cut it. */ |
| 1185 | if (deprecated_init_ui_hook) |
| 1186 | s = "A debugging session is active.\nDo you still want to close the debugger?"; |
| 1187 | else if (inf->attach_flag) |
| 1188 | s = "The program is running. Quit anyway (and detach it)? "; |
| 1189 | else |
| 1190 | s = "The program is running. Quit anyway (and kill it)? "; |
| 1191 | |
| 1192 | if (!query ("%s", s)) |
| 1193 | return 0; |
| 1194 | } |
| 1195 | |
| 1196 | return 1; |
| 1197 | } |
| 1198 | |
| 1199 | struct qt_args |
| 1200 | { |
| 1201 | char *args; |
| 1202 | int from_tty; |
| 1203 | }; |
| 1204 | |
| 1205 | /* Callback for iterate_over_threads. Finds any thread of inferior |
| 1206 | given by ARG (really an int*). */ |
| 1207 | |
| 1208 | static int |
| 1209 | any_thread_of (struct thread_info *thread, void *arg) |
| 1210 | { |
| 1211 | int pid = * (int *)arg; |
| 1212 | |
| 1213 | if (PIDGET (thread->ptid) == pid) |
| 1214 | return 1; |
| 1215 | |
| 1216 | return 0; |
| 1217 | } |
| 1218 | |
| 1219 | /* Callback for iterate_over_inferiors. Kills or detaches the given |
| 1220 | inferior, depending on how we originally gained control of it. */ |
| 1221 | |
| 1222 | static int |
| 1223 | kill_or_detach (struct inferior *inf, void *args) |
| 1224 | { |
| 1225 | struct qt_args *qt = args; |
| 1226 | struct thread_info *thread; |
| 1227 | |
| 1228 | thread = iterate_over_threads (any_thread_of, &inf->pid); |
| 1229 | if (thread) |
| 1230 | { |
| 1231 | switch_to_thread (thread->ptid); |
| 1232 | if (inf->attach_flag) |
| 1233 | target_detach (qt->args, qt->from_tty); |
| 1234 | else |
| 1235 | target_kill (); |
| 1236 | } |
| 1237 | |
| 1238 | return 0; |
| 1239 | } |
| 1240 | |
| 1241 | /* Helper routine for quit_force that requires error handling. */ |
| 1242 | |
| 1243 | static int |
| 1244 | quit_target (void *arg) |
| 1245 | { |
| 1246 | struct qt_args *qt = (struct qt_args *)arg; |
| 1247 | |
| 1248 | /* Kill or detach all inferiors. */ |
| 1249 | iterate_over_inferiors (kill_or_detach, qt); |
| 1250 | |
| 1251 | /* Give all pushed targets a chance to do minimal cleanup, and pop |
| 1252 | them all out. */ |
| 1253 | pop_all_targets (1); |
| 1254 | |
| 1255 | /* Save the history information if it is appropriate to do so. */ |
| 1256 | if (write_history_p && history_filename) |
| 1257 | write_history (history_filename); |
| 1258 | |
| 1259 | do_final_cleanups (ALL_CLEANUPS); /* Do any final cleanups before exiting */ |
| 1260 | |
| 1261 | return 0; |
| 1262 | } |
| 1263 | |
| 1264 | /* Quit without asking for confirmation. */ |
| 1265 | |
| 1266 | void |
| 1267 | quit_force (char *args, int from_tty) |
| 1268 | { |
| 1269 | int exit_code = 0; |
| 1270 | struct qt_args qt; |
| 1271 | |
| 1272 | /* An optional expression may be used to cause gdb to terminate with the |
| 1273 | value of that expression. */ |
| 1274 | if (args) |
| 1275 | { |
| 1276 | struct value *val = parse_and_eval (args); |
| 1277 | |
| 1278 | exit_code = (int) value_as_long (val); |
| 1279 | } |
| 1280 | else if (return_child_result) |
| 1281 | exit_code = return_child_result_value; |
| 1282 | |
| 1283 | qt.args = args; |
| 1284 | qt.from_tty = from_tty; |
| 1285 | |
| 1286 | /* We want to handle any quit errors and exit regardless. */ |
| 1287 | catch_errors (quit_target, &qt, |
| 1288 | "Quitting: ", RETURN_MASK_ALL); |
| 1289 | |
| 1290 | exit (exit_code); |
| 1291 | } |
| 1292 | |
| 1293 | /* Returns whether GDB is running on a terminal and input is |
| 1294 | currently coming from that terminal. */ |
| 1295 | |
| 1296 | int |
| 1297 | input_from_terminal_p (void) |
| 1298 | { |
| 1299 | if (gdb_has_a_terminal () && instream == stdin) |
| 1300 | return 1; |
| 1301 | |
| 1302 | /* If INSTREAM is unset, and we are not in a user command, we |
| 1303 | must be in Insight. That's like having a terminal, for our |
| 1304 | purposes. */ |
| 1305 | if (instream == NULL && !in_user_command) |
| 1306 | return 1; |
| 1307 | |
| 1308 | return 0; |
| 1309 | } |
| 1310 | \f |
| 1311 | static void |
| 1312 | dont_repeat_command (char *ignored, int from_tty) |
| 1313 | { |
| 1314 | *line = 0; /* Can't call dont_repeat here because we're not |
| 1315 | necessarily reading from stdin. */ |
| 1316 | } |
| 1317 | \f |
| 1318 | /* Functions to manipulate command line editing control variables. */ |
| 1319 | |
| 1320 | /* Number of commands to print in each call to show_commands. */ |
| 1321 | #define Hist_print 10 |
| 1322 | void |
| 1323 | show_commands (char *args, int from_tty) |
| 1324 | { |
| 1325 | /* Index for history commands. Relative to history_base. */ |
| 1326 | int offset; |
| 1327 | |
| 1328 | /* Number of the history entry which we are planning to display next. |
| 1329 | Relative to history_base. */ |
| 1330 | static int num = 0; |
| 1331 | |
| 1332 | /* The first command in the history which doesn't exist (i.e. one more |
| 1333 | than the number of the last command). Relative to history_base. */ |
| 1334 | int hist_len; |
| 1335 | |
| 1336 | /* Print out some of the commands from the command history. */ |
| 1337 | /* First determine the length of the history list. */ |
| 1338 | hist_len = history_size; |
| 1339 | for (offset = 0; offset < history_size; offset++) |
| 1340 | { |
| 1341 | if (!history_get (history_base + offset)) |
| 1342 | { |
| 1343 | hist_len = offset; |
| 1344 | break; |
| 1345 | } |
| 1346 | } |
| 1347 | |
| 1348 | if (args) |
| 1349 | { |
| 1350 | if (args[0] == '+' && args[1] == '\0') |
| 1351 | /* "info editing +" should print from the stored position. */ |
| 1352 | ; |
| 1353 | else |
| 1354 | /* "info editing <exp>" should print around command number <exp>. */ |
| 1355 | num = (parse_and_eval_long (args) - history_base) - Hist_print / 2; |
| 1356 | } |
| 1357 | /* "show commands" means print the last Hist_print commands. */ |
| 1358 | else |
| 1359 | { |
| 1360 | num = hist_len - Hist_print; |
| 1361 | } |
| 1362 | |
| 1363 | if (num < 0) |
| 1364 | num = 0; |
| 1365 | |
| 1366 | /* If there are at least Hist_print commands, we want to display the last |
| 1367 | Hist_print rather than, say, the last 6. */ |
| 1368 | if (hist_len - num < Hist_print) |
| 1369 | { |
| 1370 | num = hist_len - Hist_print; |
| 1371 | if (num < 0) |
| 1372 | num = 0; |
| 1373 | } |
| 1374 | |
| 1375 | for (offset = num; offset < num + Hist_print && offset < hist_len; offset++) |
| 1376 | { |
| 1377 | printf_filtered ("%5d %s\n", history_base + offset, |
| 1378 | (history_get (history_base + offset))->line); |
| 1379 | } |
| 1380 | |
| 1381 | /* The next command we want to display is the next one that we haven't |
| 1382 | displayed yet. */ |
| 1383 | num += Hist_print; |
| 1384 | |
| 1385 | /* If the user repeats this command with return, it should do what |
| 1386 | "show commands +" does. This is unnecessary if arg is null, |
| 1387 | because "show commands +" is not useful after "show commands". */ |
| 1388 | if (from_tty && args) |
| 1389 | { |
| 1390 | args[0] = '+'; |
| 1391 | args[1] = '\0'; |
| 1392 | } |
| 1393 | } |
| 1394 | |
| 1395 | /* Called by do_setshow_command. */ |
| 1396 | static void |
| 1397 | set_history_size_command (char *args, int from_tty, struct cmd_list_element *c) |
| 1398 | { |
| 1399 | if (history_size == INT_MAX) |
| 1400 | unstifle_history (); |
| 1401 | else if (history_size >= 0) |
| 1402 | stifle_history (history_size); |
| 1403 | else |
| 1404 | { |
| 1405 | history_size = INT_MAX; |
| 1406 | error (_("History size must be non-negative")); |
| 1407 | } |
| 1408 | } |
| 1409 | |
| 1410 | void |
| 1411 | set_history (char *args, int from_tty) |
| 1412 | { |
| 1413 | printf_unfiltered (_("\"set history\" must be followed by the name of a history subcommand.\n")); |
| 1414 | help_list (sethistlist, "set history ", -1, gdb_stdout); |
| 1415 | } |
| 1416 | |
| 1417 | void |
| 1418 | show_history (char *args, int from_tty) |
| 1419 | { |
| 1420 | cmd_show_list (showhistlist, from_tty, ""); |
| 1421 | } |
| 1422 | |
| 1423 | int info_verbose = 0; /* Default verbose msgs off */ |
| 1424 | |
| 1425 | /* Called by do_setshow_command. An elaborate joke. */ |
| 1426 | void |
| 1427 | set_verbose (char *args, int from_tty, struct cmd_list_element *c) |
| 1428 | { |
| 1429 | char *cmdname = "verbose"; |
| 1430 | struct cmd_list_element *showcmd; |
| 1431 | |
| 1432 | showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1); |
| 1433 | |
| 1434 | if (info_verbose) |
| 1435 | { |
| 1436 | c->doc = "Set verbose printing of informational messages."; |
| 1437 | showcmd->doc = "Show verbose printing of informational messages."; |
| 1438 | } |
| 1439 | else |
| 1440 | { |
| 1441 | c->doc = "Set verbosity."; |
| 1442 | showcmd->doc = "Show verbosity."; |
| 1443 | } |
| 1444 | } |
| 1445 | |
| 1446 | /* Init the history buffer. Note that we are called after the init file(s) |
| 1447 | * have been read so that the user can change the history file via his |
| 1448 | * .gdbinit file (for instance). The GDBHISTFILE environment variable |
| 1449 | * overrides all of this. |
| 1450 | */ |
| 1451 | |
| 1452 | void |
| 1453 | init_history (void) |
| 1454 | { |
| 1455 | char *tmpenv; |
| 1456 | |
| 1457 | tmpenv = getenv ("HISTSIZE"); |
| 1458 | if (tmpenv) |
| 1459 | history_size = atoi (tmpenv); |
| 1460 | else if (!history_size) |
| 1461 | history_size = 256; |
| 1462 | |
| 1463 | stifle_history (history_size); |
| 1464 | |
| 1465 | tmpenv = getenv ("GDBHISTFILE"); |
| 1466 | if (tmpenv) |
| 1467 | history_filename = savestring (tmpenv, strlen (tmpenv)); |
| 1468 | else if (!history_filename) |
| 1469 | { |
| 1470 | /* We include the current directory so that if the user changes |
| 1471 | directories the file written will be the same as the one |
| 1472 | that was read. */ |
| 1473 | #ifdef __MSDOS__ |
| 1474 | /* No leading dots in file names are allowed on MSDOS. */ |
| 1475 | history_filename = concat (current_directory, "/_gdb_history", |
| 1476 | (char *)NULL); |
| 1477 | #else |
| 1478 | history_filename = concat (current_directory, "/.gdb_history", |
| 1479 | (char *)NULL); |
| 1480 | #endif |
| 1481 | } |
| 1482 | read_history (history_filename); |
| 1483 | } |
| 1484 | |
| 1485 | static void |
| 1486 | show_new_async_prompt (struct ui_file *file, int from_tty, |
| 1487 | struct cmd_list_element *c, const char *value) |
| 1488 | { |
| 1489 | fprintf_filtered (file, _("Gdb's prompt is \"%s\".\n"), value); |
| 1490 | } |
| 1491 | |
| 1492 | static void |
| 1493 | show_async_command_editing_p (struct ui_file *file, int from_tty, |
| 1494 | struct cmd_list_element *c, const char *value) |
| 1495 | { |
| 1496 | fprintf_filtered (file, _("\ |
| 1497 | Editing of command lines as they are typed is %s.\n"), |
| 1498 | value); |
| 1499 | } |
| 1500 | |
| 1501 | static void |
| 1502 | show_annotation_level (struct ui_file *file, int from_tty, |
| 1503 | struct cmd_list_element *c, const char *value) |
| 1504 | { |
| 1505 | fprintf_filtered (file, _("Annotation_level is %s.\n"), value); |
| 1506 | } |
| 1507 | |
| 1508 | static void |
| 1509 | show_exec_done_display_p (struct ui_file *file, int from_tty, |
| 1510 | struct cmd_list_element *c, const char *value) |
| 1511 | { |
| 1512 | fprintf_filtered (file, _("\ |
| 1513 | Notification of completion for asynchronous execution commands is %s.\n"), |
| 1514 | value); |
| 1515 | } |
| 1516 | static void |
| 1517 | init_main (void) |
| 1518 | { |
| 1519 | struct cmd_list_element *c; |
| 1520 | |
| 1521 | /* initialize the prompt stack to a simple "(gdb) " prompt or to |
| 1522 | whatever the DEFAULT_PROMPT is. */ |
| 1523 | the_prompts.top = 0; |
| 1524 | PREFIX (0) = ""; |
| 1525 | PROMPT (0) = savestring (DEFAULT_PROMPT, strlen (DEFAULT_PROMPT)); |
| 1526 | SUFFIX (0) = ""; |
| 1527 | /* Set things up for annotation_level > 1, if the user ever decides |
| 1528 | to use it. */ |
| 1529 | async_annotation_suffix = "prompt"; |
| 1530 | /* Set the variable associated with the setshow prompt command. */ |
| 1531 | new_async_prompt = savestring (PROMPT (0), strlen (PROMPT (0))); |
| 1532 | |
| 1533 | /* If gdb was started with --annotate=2, this is equivalent to the |
| 1534 | user entering the command 'set annotate 2' at the gdb prompt, so |
| 1535 | we need to do extra processing. */ |
| 1536 | if (annotation_level > 1) |
| 1537 | set_async_annotation_level (NULL, 0, NULL); |
| 1538 | |
| 1539 | /* Set the important stuff up for command editing. */ |
| 1540 | command_editing_p = 1; |
| 1541 | history_expansion_p = 0; |
| 1542 | write_history_p = 0; |
| 1543 | |
| 1544 | /* Setup important stuff for command line editing. */ |
| 1545 | rl_completion_entry_function = readline_line_completion_function; |
| 1546 | rl_completer_word_break_characters = default_word_break_characters (); |
| 1547 | rl_completer_quote_characters = get_gdb_completer_quote_characters (); |
| 1548 | rl_readline_name = "gdb"; |
| 1549 | rl_terminal_name = getenv ("TERM"); |
| 1550 | |
| 1551 | /* The name for this defun comes from Bash, where it originated. |
| 1552 | 15 is Control-o, the same binding this function has in Bash. */ |
| 1553 | rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15); |
| 1554 | |
| 1555 | add_setshow_string_cmd ("prompt", class_support, |
| 1556 | &new_async_prompt, _("\ |
| 1557 | Set gdb's prompt"), _("\ |
| 1558 | Show gdb's prompt"), NULL, |
| 1559 | set_async_prompt, |
| 1560 | show_new_async_prompt, |
| 1561 | &setlist, &showlist); |
| 1562 | |
| 1563 | add_com ("dont-repeat", class_support, dont_repeat_command, _("\ |
| 1564 | Don't repeat this command.\n\ |
| 1565 | Primarily used inside of user-defined commands that should not be repeated when\n\ |
| 1566 | hitting return.")); |
| 1567 | |
| 1568 | add_setshow_boolean_cmd ("editing", class_support, |
| 1569 | &async_command_editing_p, _("\ |
| 1570 | Set editing of command lines as they are typed."), _("\ |
| 1571 | Show editing of command lines as they are typed."), _("\ |
| 1572 | Use \"on\" to enable the editing, and \"off\" to disable it.\n\ |
| 1573 | Without an argument, command line editing is enabled. To edit, use\n\ |
| 1574 | EMACS-like or VI-like commands like control-P or ESC."), |
| 1575 | set_async_editing_command, |
| 1576 | show_async_command_editing_p, |
| 1577 | &setlist, &showlist); |
| 1578 | |
| 1579 | add_setshow_boolean_cmd ("save", no_class, &write_history_p, _("\ |
| 1580 | Set saving of the history record on exit."), _("\ |
| 1581 | Show saving of the history record on exit."), _("\ |
| 1582 | Use \"on\" to enable the saving, and \"off\" to disable it.\n\ |
| 1583 | Without an argument, saving is enabled."), |
| 1584 | NULL, |
| 1585 | show_write_history_p, |
| 1586 | &sethistlist, &showhistlist); |
| 1587 | |
| 1588 | add_setshow_integer_cmd ("size", no_class, &history_size, _("\ |
| 1589 | Set the size of the command history,"), _("\ |
| 1590 | Show the size of the command history,"), _("\ |
| 1591 | ie. the number of previous commands to keep a record of."), |
| 1592 | set_history_size_command, |
| 1593 | show_history_size, |
| 1594 | &sethistlist, &showhistlist); |
| 1595 | |
| 1596 | add_setshow_filename_cmd ("filename", no_class, &history_filename, _("\ |
| 1597 | Set the filename in which to record the command history"), _("\ |
| 1598 | Show the filename in which to record the command history"), _("\ |
| 1599 | (the list of previous commands of which a record is kept)."), |
| 1600 | NULL, |
| 1601 | show_history_filename, |
| 1602 | &sethistlist, &showhistlist); |
| 1603 | |
| 1604 | add_setshow_boolean_cmd ("confirm", class_support, &caution, _("\ |
| 1605 | Set whether to confirm potentially dangerous operations."), _("\ |
| 1606 | Show whether to confirm potentially dangerous operations."), NULL, |
| 1607 | NULL, |
| 1608 | show_caution, |
| 1609 | &setlist, &showlist); |
| 1610 | |
| 1611 | add_setshow_zinteger_cmd ("annotate", class_obscure, &annotation_level, _("\ |
| 1612 | Set annotation_level."), _("\ |
| 1613 | Show annotation_level."), _("\ |
| 1614 | 0 == normal; 1 == fullname (for use when running under emacs)\n\ |
| 1615 | 2 == output annotated suitably for use by programs that control GDB."), |
| 1616 | set_async_annotation_level, |
| 1617 | show_annotation_level, |
| 1618 | &setlist, &showlist); |
| 1619 | |
| 1620 | add_setshow_boolean_cmd ("exec-done-display", class_support, |
| 1621 | &exec_done_display_p, _("\ |
| 1622 | Set notification of completion for asynchronous execution commands."), _("\ |
| 1623 | Show notification of completion for asynchronous execution commands."), _("\ |
| 1624 | Use \"on\" to enable the notification, and \"off\" to disable it."), |
| 1625 | NULL, |
| 1626 | show_exec_done_display_p, |
| 1627 | &setlist, &showlist); |
| 1628 | } |
| 1629 | |
| 1630 | void |
| 1631 | gdb_init (char *argv0) |
| 1632 | { |
| 1633 | if (pre_init_ui_hook) |
| 1634 | pre_init_ui_hook (); |
| 1635 | |
| 1636 | /* Run the init function of each source file */ |
| 1637 | |
| 1638 | #ifdef __MSDOS__ |
| 1639 | /* Make sure we return to the original directory upon exit, come |
| 1640 | what may, since the OS doesn't do that for us. */ |
| 1641 | make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory)); |
| 1642 | #endif |
| 1643 | |
| 1644 | init_cmd_lists (); /* This needs to be done first */ |
| 1645 | initialize_targets (); /* Setup target_terminal macros for utils.c */ |
| 1646 | initialize_utils (); /* Make errors and warnings possible */ |
| 1647 | initialize_all_files (); |
| 1648 | initialize_current_architecture (); |
| 1649 | init_cli_cmds(); |
| 1650 | init_main (); /* But that omits this file! Do it now */ |
| 1651 | |
| 1652 | initialize_stdin_serial (); |
| 1653 | |
| 1654 | async_init_signals (); |
| 1655 | |
| 1656 | /* We need a default language for parsing expressions, so simple things like |
| 1657 | "set width 0" won't fail if no language is explicitly set in a config file |
| 1658 | or implicitly set by reading an executable during startup. */ |
| 1659 | set_language (language_c); |
| 1660 | expected_language = current_language; /* don't warn about the change. */ |
| 1661 | |
| 1662 | /* Allow another UI to initialize. If the UI fails to initialize, |
| 1663 | and it wants GDB to revert to the CLI, it should clear |
| 1664 | deprecated_init_ui_hook. */ |
| 1665 | if (deprecated_init_ui_hook) |
| 1666 | deprecated_init_ui_hook (argv0); |
| 1667 | } |