| 1 | /* Top level stuff for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 1986-2016 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 3 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, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "gdbcmd.h" |
| 22 | #include "cli/cli-cmds.h" |
| 23 | #include "cli/cli-script.h" |
| 24 | #include "cli/cli-setshow.h" |
| 25 | #include "cli/cli-decode.h" |
| 26 | #include "symtab.h" |
| 27 | #include "inferior.h" |
| 28 | #include "infrun.h" |
| 29 | #include <signal.h> |
| 30 | #include "target.h" |
| 31 | #include "target-dcache.h" |
| 32 | #include "breakpoint.h" |
| 33 | #include "gdbtypes.h" |
| 34 | #include "expression.h" |
| 35 | #include "value.h" |
| 36 | #include "language.h" |
| 37 | #include "terminal.h" /* For job_control. */ |
| 38 | #include "annotate.h" |
| 39 | #include "completer.h" |
| 40 | #include "top.h" |
| 41 | #include "version.h" |
| 42 | #include "serial.h" |
| 43 | #include "doublest.h" |
| 44 | #include "main.h" |
| 45 | #include "event-loop.h" |
| 46 | #include "gdbthread.h" |
| 47 | #include "extension.h" |
| 48 | #include "interps.h" |
| 49 | #include "observer.h" |
| 50 | #include "maint.h" |
| 51 | #include "filenames.h" |
| 52 | #include "frame.h" |
| 53 | #include "buffer.h" |
| 54 | |
| 55 | /* readline include files. */ |
| 56 | #include "readline/readline.h" |
| 57 | #include "readline/history.h" |
| 58 | |
| 59 | /* readline defines this. */ |
| 60 | #undef savestring |
| 61 | |
| 62 | #include <sys/types.h> |
| 63 | |
| 64 | #include "event-top.h" |
| 65 | #include <sys/stat.h> |
| 66 | #include <ctype.h> |
| 67 | #include "ui-out.h" |
| 68 | #include "cli-out.h" |
| 69 | #include "tracepoint.h" |
| 70 | #include "inf-loop.h" |
| 71 | |
| 72 | #if defined(TUI) |
| 73 | # include "tui/tui.h" |
| 74 | #endif |
| 75 | |
| 76 | extern void initialize_all_files (void); |
| 77 | |
| 78 | #define PROMPT(X) the_prompts.prompt_stack[the_prompts.top + X].prompt |
| 79 | #define PREFIX(X) the_prompts.prompt_stack[the_prompts.top + X].prefix |
| 80 | #define SUFFIX(X) the_prompts.prompt_stack[the_prompts.top + X].suffix |
| 81 | |
| 82 | /* Default command line prompt. This is overriden in some configs. */ |
| 83 | |
| 84 | #ifndef DEFAULT_PROMPT |
| 85 | #define DEFAULT_PROMPT "(gdb) " |
| 86 | #endif |
| 87 | |
| 88 | /* Initialization file name for gdb. This is host-dependent. */ |
| 89 | |
| 90 | const char gdbinit[] = GDBINIT; |
| 91 | |
| 92 | int inhibit_gdbinit = 0; |
| 93 | |
| 94 | extern char lang_frame_mismatch_warn[]; /* language.c */ |
| 95 | |
| 96 | /* Flag for whether we want to confirm potentially dangerous |
| 97 | operations. Default is yes. */ |
| 98 | |
| 99 | int confirm = 1; |
| 100 | |
| 101 | static void |
| 102 | show_confirm (struct ui_file *file, int from_tty, |
| 103 | struct cmd_list_element *c, const char *value) |
| 104 | { |
| 105 | fprintf_filtered (file, _("Whether to confirm potentially " |
| 106 | "dangerous operations is %s.\n"), |
| 107 | value); |
| 108 | } |
| 109 | |
| 110 | /* stdio stream that command input is being read from. Set to stdin |
| 111 | normally. Set by source_command to the file we are sourcing. Set |
| 112 | to NULL if we are executing a user-defined command or interacting |
| 113 | via a GUI. */ |
| 114 | |
| 115 | FILE *instream; |
| 116 | |
| 117 | /* Flag to indicate whether a user defined command is currently running. */ |
| 118 | |
| 119 | int in_user_command; |
| 120 | |
| 121 | /* Current working directory. */ |
| 122 | |
| 123 | char *current_directory; |
| 124 | |
| 125 | /* The directory name is actually stored here (usually). */ |
| 126 | char gdb_dirbuf[1024]; |
| 127 | |
| 128 | /* Buffer used for reading command lines, and the size |
| 129 | allocated for it so far. */ |
| 130 | |
| 131 | char *saved_command_line; |
| 132 | int saved_command_line_size = 100; |
| 133 | |
| 134 | /* Nonzero if the current command is modified by "server ". This |
| 135 | affects things like recording into the command history, commands |
| 136 | repeating on RETURN, etc. This is so a user interface (emacs, GUI, |
| 137 | whatever) can issue its own commands and also send along commands |
| 138 | from the user, and have the user not notice that the user interface |
| 139 | is issuing commands too. */ |
| 140 | int server_command; |
| 141 | |
| 142 | /* Timeout limit for response from target. */ |
| 143 | |
| 144 | /* The default value has been changed many times over the years. It |
| 145 | was originally 5 seconds. But that was thought to be a long time |
| 146 | to sit and wait, so it was changed to 2 seconds. That was thought |
| 147 | to be plenty unless the connection was going through some terminal |
| 148 | server or multiplexer or other form of hairy serial connection. |
| 149 | |
| 150 | In mid-1996, remote_timeout was moved from remote.c to top.c and |
| 151 | it began being used in other remote-* targets. It appears that the |
| 152 | default was changed to 20 seconds at that time, perhaps because the |
| 153 | Renesas E7000 ICE didn't always respond in a timely manner. |
| 154 | |
| 155 | But if 5 seconds is a long time to sit and wait for retransmissions, |
| 156 | 20 seconds is far worse. This demonstrates the difficulty of using |
| 157 | a single variable for all protocol timeouts. |
| 158 | |
| 159 | As remote.c is used much more than remote-e7000.c, it was changed |
| 160 | back to 2 seconds in 1999. */ |
| 161 | |
| 162 | int remote_timeout = 2; |
| 163 | |
| 164 | /* Non-zero tells remote* modules to output debugging info. */ |
| 165 | |
| 166 | int remote_debug = 0; |
| 167 | |
| 168 | /* Sbrk location on entry to main. Used for statistics only. */ |
| 169 | #ifdef HAVE_SBRK |
| 170 | char *lim_at_start; |
| 171 | #endif |
| 172 | |
| 173 | /* Hooks for alternate command interfaces. */ |
| 174 | |
| 175 | /* This hook is called from within gdb's many mini-event loops which |
| 176 | could steal control from a real user interface's event loop. It |
| 177 | returns non-zero if the user is requesting a detach, zero |
| 178 | otherwise. */ |
| 179 | |
| 180 | int (*deprecated_ui_loop_hook) (int); |
| 181 | |
| 182 | |
| 183 | /* Called from print_frame_info to list the line we stopped in. */ |
| 184 | |
| 185 | void (*deprecated_print_frame_info_listing_hook) (struct symtab * s, |
| 186 | int line, |
| 187 | int stopline, |
| 188 | int noerror); |
| 189 | /* Replaces most of query. */ |
| 190 | |
| 191 | int (*deprecated_query_hook) (const char *, va_list); |
| 192 | |
| 193 | /* Replaces most of warning. */ |
| 194 | |
| 195 | void (*deprecated_warning_hook) (const char *, va_list); |
| 196 | |
| 197 | /* These three functions support getting lines of text from the user. |
| 198 | They are used in sequence. First deprecated_readline_begin_hook is |
| 199 | called with a text string that might be (for example) a message for |
| 200 | the user to type in a sequence of commands to be executed at a |
| 201 | breakpoint. If this function calls back to a GUI, it might take |
| 202 | this opportunity to pop up a text interaction window with this |
| 203 | message. Next, deprecated_readline_hook is called with a prompt |
| 204 | that is emitted prior to collecting the user input. It can be |
| 205 | called multiple times. Finally, deprecated_readline_end_hook is |
| 206 | called to notify the GUI that we are done with the interaction |
| 207 | window and it can close it. */ |
| 208 | |
| 209 | void (*deprecated_readline_begin_hook) (char *, ...); |
| 210 | char *(*deprecated_readline_hook) (const char *); |
| 211 | void (*deprecated_readline_end_hook) (void); |
| 212 | |
| 213 | /* Called as appropriate to notify the interface that we have attached |
| 214 | to or detached from an already running process. */ |
| 215 | |
| 216 | void (*deprecated_attach_hook) (void); |
| 217 | void (*deprecated_detach_hook) (void); |
| 218 | |
| 219 | /* Called during long calculations to allow GUI to repair window |
| 220 | damage, and to check for stop buttons, etc... */ |
| 221 | |
| 222 | void (*deprecated_interactive_hook) (void); |
| 223 | |
| 224 | /* Called when going to wait for the target. Usually allows the GUI |
| 225 | to run while waiting for target events. */ |
| 226 | |
| 227 | ptid_t (*deprecated_target_wait_hook) (ptid_t ptid, |
| 228 | struct target_waitstatus *status, |
| 229 | int options); |
| 230 | |
| 231 | /* Used by UI as a wrapper around command execution. May do various |
| 232 | things like enabling/disabling buttons, etc... */ |
| 233 | |
| 234 | void (*deprecated_call_command_hook) (struct cmd_list_element * c, |
| 235 | char *cmd, int from_tty); |
| 236 | |
| 237 | /* Called when the current thread changes. Argument is thread id. */ |
| 238 | |
| 239 | void (*deprecated_context_hook) (int id); |
| 240 | |
| 241 | /* Handler for SIGHUP. */ |
| 242 | |
| 243 | #ifdef SIGHUP |
| 244 | /* NOTE 1999-04-29: This function will be static again, once we modify |
| 245 | gdb to use the event loop as the default command loop and we merge |
| 246 | event-top.c into this file, top.c. */ |
| 247 | /* static */ void |
| 248 | quit_cover (void) |
| 249 | { |
| 250 | /* Stop asking user for confirmation --- we're exiting. This |
| 251 | prevents asking the user dumb questions. */ |
| 252 | confirm = 0; |
| 253 | quit_command ((char *) 0, 0); |
| 254 | } |
| 255 | #endif /* defined SIGHUP */ |
| 256 | \f |
| 257 | /* Line number we are currently in, in a file which is being sourced. */ |
| 258 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
| 259 | gdb to use the event loop as the default command loop and we merge |
| 260 | event-top.c into this file, top.c. */ |
| 261 | /* static */ int source_line_number; |
| 262 | |
| 263 | /* Name of the file we are sourcing. */ |
| 264 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
| 265 | gdb to use the event loop as the default command loop and we merge |
| 266 | event-top.c into this file, top.c. */ |
| 267 | /* static */ const char *source_file_name; |
| 268 | |
| 269 | /* Clean up on error during a "source" command (or execution of a |
| 270 | user-defined command). */ |
| 271 | |
| 272 | void |
| 273 | do_restore_instream_cleanup (void *stream) |
| 274 | { |
| 275 | /* Restore the previous input stream. */ |
| 276 | instream = (FILE *) stream; |
| 277 | } |
| 278 | |
| 279 | /* Read commands from STREAM. */ |
| 280 | void |
| 281 | read_command_file (FILE *stream) |
| 282 | { |
| 283 | struct cleanup *cleanups; |
| 284 | |
| 285 | cleanups = make_cleanup (do_restore_instream_cleanup, instream); |
| 286 | instream = stream; |
| 287 | command_loop (); |
| 288 | do_cleanups (cleanups); |
| 289 | } |
| 290 | \f |
| 291 | void (*pre_init_ui_hook) (void); |
| 292 | |
| 293 | #ifdef __MSDOS__ |
| 294 | static void |
| 295 | do_chdir_cleanup (void *old_dir) |
| 296 | { |
| 297 | chdir (old_dir); |
| 298 | xfree (old_dir); |
| 299 | } |
| 300 | #endif |
| 301 | |
| 302 | struct cleanup * |
| 303 | prepare_execute_command (void) |
| 304 | { |
| 305 | struct value *mark; |
| 306 | struct cleanup *cleanup; |
| 307 | |
| 308 | mark = value_mark (); |
| 309 | cleanup = make_cleanup_value_free_to_mark (mark); |
| 310 | |
| 311 | /* With multiple threads running while the one we're examining is |
| 312 | stopped, the dcache can get stale without us being able to detect |
| 313 | it. For the duration of the command, though, use the dcache to |
| 314 | help things like backtrace. */ |
| 315 | if (non_stop) |
| 316 | target_dcache_invalidate (); |
| 317 | |
| 318 | return cleanup; |
| 319 | } |
| 320 | |
| 321 | /* Tell the user if the language has changed (except first time) after |
| 322 | executing a command. */ |
| 323 | |
| 324 | void |
| 325 | check_frame_language_change (void) |
| 326 | { |
| 327 | static int warned = 0; |
| 328 | struct frame_info *frame; |
| 329 | |
| 330 | /* First make sure that a new frame has been selected, in case the |
| 331 | command or the hooks changed the program state. */ |
| 332 | frame = deprecated_safe_get_selected_frame (); |
| 333 | if (current_language != expected_language) |
| 334 | { |
| 335 | if (language_mode == language_mode_auto && info_verbose) |
| 336 | { |
| 337 | language_info (1); /* Print what changed. */ |
| 338 | } |
| 339 | warned = 0; |
| 340 | } |
| 341 | |
| 342 | /* Warn the user if the working language does not match the language |
| 343 | of the current frame. Only warn the user if we are actually |
| 344 | running the program, i.e. there is a stack. */ |
| 345 | /* FIXME: This should be cacheing the frame and only running when |
| 346 | the frame changes. */ |
| 347 | |
| 348 | if (has_stack_frames ()) |
| 349 | { |
| 350 | enum language flang; |
| 351 | |
| 352 | flang = get_frame_language (frame); |
| 353 | if (!warned |
| 354 | && flang != language_unknown |
| 355 | && flang != current_language->la_language) |
| 356 | { |
| 357 | printf_filtered ("%s\n", lang_frame_mismatch_warn); |
| 358 | warned = 1; |
| 359 | } |
| 360 | } |
| 361 | } |
| 362 | |
| 363 | /* See top.h. */ |
| 364 | |
| 365 | void |
| 366 | wait_sync_command_done (void) |
| 367 | { |
| 368 | while (gdb_do_one_event () >= 0) |
| 369 | if (!sync_execution) |
| 370 | break; |
| 371 | } |
| 372 | |
| 373 | /* See top.h. */ |
| 374 | |
| 375 | void |
| 376 | maybe_wait_sync_command_done (int was_sync) |
| 377 | { |
| 378 | /* If the interpreter is in sync mode (we're running a user |
| 379 | command's list, running command hooks or similars), and we |
| 380 | just ran a synchronous command that started the target, wait |
| 381 | for that command to end. */ |
| 382 | if (!interpreter_async && !was_sync && sync_execution) |
| 383 | wait_sync_command_done (); |
| 384 | } |
| 385 | |
| 386 | /* Execute the line P as a command, in the current user context. |
| 387 | Pass FROM_TTY as second argument to the defining function. */ |
| 388 | |
| 389 | void |
| 390 | execute_command (char *p, int from_tty) |
| 391 | { |
| 392 | struct cleanup *cleanup_if_error, *cleanup; |
| 393 | struct cmd_list_element *c; |
| 394 | char *line; |
| 395 | |
| 396 | cleanup_if_error = make_bpstat_clear_actions_cleanup (); |
| 397 | cleanup = prepare_execute_command (); |
| 398 | |
| 399 | /* Force cleanup of any alloca areas if using C alloca instead of |
| 400 | a builtin alloca. */ |
| 401 | alloca (0); |
| 402 | |
| 403 | /* This can happen when command_line_input hits end of file. */ |
| 404 | if (p == NULL) |
| 405 | { |
| 406 | do_cleanups (cleanup); |
| 407 | discard_cleanups (cleanup_if_error); |
| 408 | return; |
| 409 | } |
| 410 | |
| 411 | target_log_command (p); |
| 412 | |
| 413 | while (*p == ' ' || *p == '\t') |
| 414 | p++; |
| 415 | if (*p) |
| 416 | { |
| 417 | const char *cmd = p; |
| 418 | char *arg; |
| 419 | int was_sync = sync_execution; |
| 420 | |
| 421 | line = p; |
| 422 | |
| 423 | /* If trace-commands is set then this will print this command. */ |
| 424 | print_command_trace (p); |
| 425 | |
| 426 | c = lookup_cmd (&cmd, cmdlist, "", 0, 1); |
| 427 | p = (char *) cmd; |
| 428 | |
| 429 | /* Pass null arg rather than an empty one. */ |
| 430 | arg = *p ? p : 0; |
| 431 | |
| 432 | /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy |
| 433 | while the is_complete_command(cfunc) test is just plain |
| 434 | bogus. They should both be replaced by a test of the form |
| 435 | c->strip_trailing_white_space_p. */ |
| 436 | /* NOTE: cagney/2002-02-02: The function.cfunc in the below |
| 437 | can't be replaced with func. This is because it is the |
| 438 | cfunc, and not the func, that has the value that the |
| 439 | is_complete_command hack is testing for. */ |
| 440 | /* Clear off trailing whitespace, except for set and complete |
| 441 | command. */ |
| 442 | if (arg |
| 443 | && c->type != set_cmd |
| 444 | && !is_complete_command (c)) |
| 445 | { |
| 446 | p = arg + strlen (arg) - 1; |
| 447 | while (p >= arg && (*p == ' ' || *p == '\t')) |
| 448 | p--; |
| 449 | *(p + 1) = '\0'; |
| 450 | } |
| 451 | |
| 452 | /* If this command has been pre-hooked, run the hook first. */ |
| 453 | execute_cmd_pre_hook (c); |
| 454 | |
| 455 | if (c->deprecated_warn_user) |
| 456 | deprecated_cmd_warning (line); |
| 457 | |
| 458 | /* c->user_commands would be NULL in the case of a python command. */ |
| 459 | if (c->theclass == class_user && c->user_commands) |
| 460 | execute_user_command (c, arg); |
| 461 | else if (c->type == set_cmd) |
| 462 | do_set_command (arg, from_tty, c); |
| 463 | else if (c->type == show_cmd) |
| 464 | do_show_command (arg, from_tty, c); |
| 465 | else if (!cmd_func_p (c)) |
| 466 | error (_("That is not a command, just a help topic.")); |
| 467 | else if (deprecated_call_command_hook) |
| 468 | deprecated_call_command_hook (c, arg, from_tty); |
| 469 | else |
| 470 | cmd_func (c, arg, from_tty); |
| 471 | |
| 472 | maybe_wait_sync_command_done (was_sync); |
| 473 | |
| 474 | /* If this command has been post-hooked, run the hook last. */ |
| 475 | execute_cmd_post_hook (c); |
| 476 | |
| 477 | } |
| 478 | |
| 479 | check_frame_language_change (); |
| 480 | |
| 481 | do_cleanups (cleanup); |
| 482 | discard_cleanups (cleanup_if_error); |
| 483 | } |
| 484 | |
| 485 | /* Run execute_command for P and FROM_TTY. Capture its output into the |
| 486 | returned string, do not display it to the screen. BATCH_FLAG will be |
| 487 | temporarily set to true. */ |
| 488 | |
| 489 | char * |
| 490 | execute_command_to_string (char *p, int from_tty) |
| 491 | { |
| 492 | struct ui_file *str_file; |
| 493 | struct cleanup *cleanup; |
| 494 | char *retval; |
| 495 | |
| 496 | /* GDB_STDOUT should be better already restored during these |
| 497 | restoration callbacks. */ |
| 498 | cleanup = set_batch_flag_and_make_cleanup_restore_page_info (); |
| 499 | |
| 500 | make_cleanup_restore_integer (&interpreter_async); |
| 501 | interpreter_async = 0; |
| 502 | |
| 503 | str_file = mem_fileopen (); |
| 504 | |
| 505 | make_cleanup_ui_file_delete (str_file); |
| 506 | make_cleanup_restore_ui_file (&gdb_stdout); |
| 507 | make_cleanup_restore_ui_file (&gdb_stderr); |
| 508 | make_cleanup_restore_ui_file (&gdb_stdlog); |
| 509 | make_cleanup_restore_ui_file (&gdb_stdtarg); |
| 510 | make_cleanup_restore_ui_file (&gdb_stdtargerr); |
| 511 | |
| 512 | if (ui_out_redirect (current_uiout, str_file) < 0) |
| 513 | warning (_("Current output protocol does not support redirection")); |
| 514 | else |
| 515 | make_cleanup_ui_out_redirect_pop (current_uiout); |
| 516 | |
| 517 | gdb_stdout = str_file; |
| 518 | gdb_stderr = str_file; |
| 519 | gdb_stdlog = str_file; |
| 520 | gdb_stdtarg = str_file; |
| 521 | gdb_stdtargerr = str_file; |
| 522 | |
| 523 | execute_command (p, from_tty); |
| 524 | |
| 525 | retval = ui_file_xstrdup (str_file, NULL); |
| 526 | |
| 527 | do_cleanups (cleanup); |
| 528 | |
| 529 | return retval; |
| 530 | } |
| 531 | |
| 532 | /* Read commands from `instream' and execute them |
| 533 | until end of file or error reading instream. */ |
| 534 | |
| 535 | void |
| 536 | command_loop (void) |
| 537 | { |
| 538 | struct cleanup *old_chain; |
| 539 | char *command; |
| 540 | |
| 541 | while (instream && !feof (instream)) |
| 542 | { |
| 543 | clear_quit_flag (); |
| 544 | if (instream == stdin) |
| 545 | reinitialize_more_filter (); |
| 546 | old_chain = make_cleanup (null_cleanup, 0); |
| 547 | |
| 548 | /* Get a command-line. This calls the readline package. */ |
| 549 | command = command_line_input (instream == stdin ? |
| 550 | get_prompt () : (char *) NULL, |
| 551 | instream == stdin, "prompt"); |
| 552 | if (command == 0) |
| 553 | { |
| 554 | do_cleanups (old_chain); |
| 555 | return; |
| 556 | } |
| 557 | |
| 558 | make_command_stats_cleanup (1); |
| 559 | |
| 560 | /* Do not execute commented lines. */ |
| 561 | if (command[0] != '#') |
| 562 | { |
| 563 | execute_command (command, instream == stdin); |
| 564 | |
| 565 | /* Do any commands attached to breakpoint we are stopped at. */ |
| 566 | bpstat_do_actions (); |
| 567 | } |
| 568 | do_cleanups (old_chain); |
| 569 | } |
| 570 | } |
| 571 | \f |
| 572 | /* When nonzero, cause dont_repeat to do nothing. This should only be |
| 573 | set via prevent_dont_repeat. */ |
| 574 | |
| 575 | static int suppress_dont_repeat = 0; |
| 576 | |
| 577 | /* Commands call this if they do not want to be repeated by null lines. */ |
| 578 | |
| 579 | void |
| 580 | dont_repeat (void) |
| 581 | { |
| 582 | if (suppress_dont_repeat || server_command) |
| 583 | return; |
| 584 | |
| 585 | /* If we aren't reading from standard input, we are saving the last |
| 586 | thing read from stdin in line and don't want to delete it. Null |
| 587 | lines won't repeat here in any case. */ |
| 588 | if (instream == stdin) |
| 589 | *saved_command_line = 0; |
| 590 | } |
| 591 | |
| 592 | /* Prevent dont_repeat from working, and return a cleanup that |
| 593 | restores the previous state. */ |
| 594 | |
| 595 | struct cleanup * |
| 596 | prevent_dont_repeat (void) |
| 597 | { |
| 598 | struct cleanup *result = make_cleanup_restore_integer (&suppress_dont_repeat); |
| 599 | |
| 600 | suppress_dont_repeat = 1; |
| 601 | return result; |
| 602 | } |
| 603 | |
| 604 | \f |
| 605 | /* Read a line from the stream "instream" without command line editing. |
| 606 | |
| 607 | It prints PROMPT once at the start. |
| 608 | Action is compatible with "readline", e.g. space for the result is |
| 609 | malloc'd and should be freed by the caller. |
| 610 | |
| 611 | A NULL return means end of file. */ |
| 612 | |
| 613 | static char * |
| 614 | gdb_readline_no_editing (const char *prompt) |
| 615 | { |
| 616 | struct buffer line_buffer; |
| 617 | |
| 618 | buffer_init (&line_buffer); |
| 619 | |
| 620 | if (prompt != NULL) |
| 621 | { |
| 622 | /* Don't use a _filtered function here. It causes the assumed |
| 623 | character position to be off, since the newline we read from |
| 624 | the user is not accounted for. */ |
| 625 | fputs_unfiltered (prompt, gdb_stdout); |
| 626 | gdb_flush (gdb_stdout); |
| 627 | } |
| 628 | |
| 629 | while (1) |
| 630 | { |
| 631 | int c; |
| 632 | |
| 633 | /* Read from stdin if we are executing a user defined command. |
| 634 | This is the right thing for prompt_for_continue, at least. */ |
| 635 | c = fgetc (instream ? instream : stdin); |
| 636 | |
| 637 | if (c == EOF) |
| 638 | { |
| 639 | if (line_buffer.used_size > 0) |
| 640 | /* The last line does not end with a newline. Return it, and |
| 641 | if we are called again fgetc will still return EOF and |
| 642 | we'll return NULL then. */ |
| 643 | break; |
| 644 | xfree (buffer_finish (&line_buffer)); |
| 645 | return NULL; |
| 646 | } |
| 647 | |
| 648 | if (c == '\n') |
| 649 | { |
| 650 | if (line_buffer.used_size > 0 |
| 651 | && line_buffer.buffer[line_buffer.used_size - 1] == '\r') |
| 652 | line_buffer.used_size--; |
| 653 | break; |
| 654 | } |
| 655 | |
| 656 | buffer_grow_char (&line_buffer, c); |
| 657 | } |
| 658 | |
| 659 | buffer_grow_char (&line_buffer, '\0'); |
| 660 | return buffer_finish (&line_buffer); |
| 661 | } |
| 662 | |
| 663 | /* Variables which control command line editing and history |
| 664 | substitution. These variables are given default values at the end |
| 665 | of this file. */ |
| 666 | static int command_editing_p; |
| 667 | |
| 668 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
| 669 | gdb to use the event loop as the default command loop and we merge |
| 670 | event-top.c into this file, top.c. */ |
| 671 | |
| 672 | /* static */ int history_expansion_p; |
| 673 | |
| 674 | static int write_history_p; |
| 675 | static void |
| 676 | show_write_history_p (struct ui_file *file, int from_tty, |
| 677 | struct cmd_list_element *c, const char *value) |
| 678 | { |
| 679 | fprintf_filtered (file, _("Saving of the history record on exit is %s.\n"), |
| 680 | value); |
| 681 | } |
| 682 | |
| 683 | /* The variable associated with the "set/show history size" |
| 684 | command. The value -1 means unlimited, and -2 means undefined. */ |
| 685 | static int history_size_setshow_var = -2; |
| 686 | |
| 687 | static void |
| 688 | show_history_size (struct ui_file *file, int from_tty, |
| 689 | struct cmd_list_element *c, const char *value) |
| 690 | { |
| 691 | fprintf_filtered (file, _("The size of the command history is %s.\n"), |
| 692 | value); |
| 693 | } |
| 694 | |
| 695 | /* Variable associated with the "history remove-duplicates" option. |
| 696 | The value -1 means unlimited. */ |
| 697 | static int history_remove_duplicates = 0; |
| 698 | |
| 699 | static void |
| 700 | show_history_remove_duplicates (struct ui_file *file, int from_tty, |
| 701 | struct cmd_list_element *c, const char *value) |
| 702 | { |
| 703 | fprintf_filtered (file, |
| 704 | _("The number of history entries to look back at for " |
| 705 | "duplicates is %s.\n"), |
| 706 | value); |
| 707 | } |
| 708 | |
| 709 | static char *history_filename; |
| 710 | static void |
| 711 | show_history_filename (struct ui_file *file, int from_tty, |
| 712 | struct cmd_list_element *c, const char *value) |
| 713 | { |
| 714 | fprintf_filtered (file, _("The filename in which to record " |
| 715 | "the command history is \"%s\".\n"), |
| 716 | value); |
| 717 | } |
| 718 | |
| 719 | /* This is like readline(), but it has some gdb-specific behavior. |
| 720 | gdb may want readline in both the synchronous and async modes during |
| 721 | a single gdb invocation. At the ordinary top-level prompt we might |
| 722 | be using the async readline. That means we can't use |
| 723 | rl_pre_input_hook, since it doesn't work properly in async mode. |
| 724 | However, for a secondary prompt (" >", such as occurs during a |
| 725 | `define'), gdb wants a synchronous response. |
| 726 | |
| 727 | We used to call readline() directly, running it in synchronous |
| 728 | mode. But mixing modes this way is not supported, and as of |
| 729 | readline 5.x it no longer works; the arrow keys come unbound during |
| 730 | the synchronous call. So we make a nested call into the event |
| 731 | loop. That's what gdb_readline_wrapper is for. */ |
| 732 | |
| 733 | /* A flag set as soon as gdb_readline_wrapper_line is called; we can't |
| 734 | rely on gdb_readline_wrapper_result, which might still be NULL if |
| 735 | the user types Control-D for EOF. */ |
| 736 | static int gdb_readline_wrapper_done; |
| 737 | |
| 738 | /* The result of the current call to gdb_readline_wrapper, once a newline |
| 739 | is seen. */ |
| 740 | static char *gdb_readline_wrapper_result; |
| 741 | |
| 742 | /* Any intercepted hook. Operate-and-get-next sets this, expecting it |
| 743 | to be called after the newline is processed (which will redisplay |
| 744 | the prompt). But in gdb_readline_wrapper we will not get a new |
| 745 | prompt until the next call, or until we return to the event loop. |
| 746 | So we disable this hook around the newline and restore it before we |
| 747 | return. */ |
| 748 | static void (*saved_after_char_processing_hook) (void); |
| 749 | |
| 750 | |
| 751 | /* The number of nested readline secondary prompts that are currently |
| 752 | active. */ |
| 753 | |
| 754 | static int gdb_secondary_prompt_depth = 0; |
| 755 | |
| 756 | /* See top.h. */ |
| 757 | |
| 758 | int |
| 759 | gdb_in_secondary_prompt_p (void) |
| 760 | { |
| 761 | return gdb_secondary_prompt_depth > 0; |
| 762 | } |
| 763 | |
| 764 | |
| 765 | /* This function is called when readline has seen a complete line of |
| 766 | text. */ |
| 767 | |
| 768 | static void |
| 769 | gdb_readline_wrapper_line (char *line) |
| 770 | { |
| 771 | gdb_assert (!gdb_readline_wrapper_done); |
| 772 | gdb_readline_wrapper_result = line; |
| 773 | gdb_readline_wrapper_done = 1; |
| 774 | |
| 775 | /* Prevent operate-and-get-next from acting too early. */ |
| 776 | saved_after_char_processing_hook = after_char_processing_hook; |
| 777 | after_char_processing_hook = NULL; |
| 778 | |
| 779 | /* Prevent parts of the prompt from being redisplayed if annotations |
| 780 | are enabled, and readline's state getting out of sync. We'll |
| 781 | reinstall the callback handler, which puts the terminal in raw |
| 782 | mode (or in readline lingo, in prepped state), when we're next |
| 783 | ready to process user input, either in display_gdb_prompt, or if |
| 784 | we're handling an asynchronous target event and running in the |
| 785 | background, just before returning to the event loop to process |
| 786 | further input (or more target events). */ |
| 787 | if (async_command_editing_p) |
| 788 | gdb_rl_callback_handler_remove (); |
| 789 | } |
| 790 | |
| 791 | struct gdb_readline_wrapper_cleanup |
| 792 | { |
| 793 | void (*handler_orig) (char *); |
| 794 | int already_prompted_orig; |
| 795 | |
| 796 | /* Whether the target was async. */ |
| 797 | int target_is_async_orig; |
| 798 | }; |
| 799 | |
| 800 | static void |
| 801 | gdb_readline_wrapper_cleanup (void *arg) |
| 802 | { |
| 803 | struct gdb_readline_wrapper_cleanup *cleanup |
| 804 | = (struct gdb_readline_wrapper_cleanup *) arg; |
| 805 | |
| 806 | rl_already_prompted = cleanup->already_prompted_orig; |
| 807 | |
| 808 | gdb_assert (input_handler == gdb_readline_wrapper_line); |
| 809 | input_handler = cleanup->handler_orig; |
| 810 | |
| 811 | /* Don't restore our input handler in readline yet. That would make |
| 812 | readline prep the terminal (putting it in raw mode), while the |
| 813 | line we just read may trigger execution of a command that expects |
| 814 | the terminal in the default cooked/canonical mode, such as e.g., |
| 815 | running Python's interactive online help utility. See |
| 816 | gdb_readline_wrapper_line for when we'll reinstall it. */ |
| 817 | |
| 818 | gdb_readline_wrapper_result = NULL; |
| 819 | gdb_readline_wrapper_done = 0; |
| 820 | gdb_secondary_prompt_depth--; |
| 821 | gdb_assert (gdb_secondary_prompt_depth >= 0); |
| 822 | |
| 823 | after_char_processing_hook = saved_after_char_processing_hook; |
| 824 | saved_after_char_processing_hook = NULL; |
| 825 | |
| 826 | if (cleanup->target_is_async_orig) |
| 827 | target_async (1); |
| 828 | |
| 829 | xfree (cleanup); |
| 830 | } |
| 831 | |
| 832 | char * |
| 833 | gdb_readline_wrapper (const char *prompt) |
| 834 | { |
| 835 | struct cleanup *back_to; |
| 836 | struct gdb_readline_wrapper_cleanup *cleanup; |
| 837 | char *retval; |
| 838 | |
| 839 | cleanup = XNEW (struct gdb_readline_wrapper_cleanup); |
| 840 | cleanup->handler_orig = input_handler; |
| 841 | input_handler = gdb_readline_wrapper_line; |
| 842 | |
| 843 | cleanup->already_prompted_orig = rl_already_prompted; |
| 844 | |
| 845 | cleanup->target_is_async_orig = target_is_async_p (); |
| 846 | |
| 847 | gdb_secondary_prompt_depth++; |
| 848 | back_to = make_cleanup (gdb_readline_wrapper_cleanup, cleanup); |
| 849 | |
| 850 | if (cleanup->target_is_async_orig) |
| 851 | target_async (0); |
| 852 | |
| 853 | /* Display our prompt and prevent double prompt display. */ |
| 854 | display_gdb_prompt (prompt); |
| 855 | rl_already_prompted = 1; |
| 856 | |
| 857 | if (after_char_processing_hook) |
| 858 | (*after_char_processing_hook) (); |
| 859 | gdb_assert (after_char_processing_hook == NULL); |
| 860 | |
| 861 | while (gdb_do_one_event () >= 0) |
| 862 | if (gdb_readline_wrapper_done) |
| 863 | break; |
| 864 | |
| 865 | retval = gdb_readline_wrapper_result; |
| 866 | do_cleanups (back_to); |
| 867 | return retval; |
| 868 | } |
| 869 | |
| 870 | \f |
| 871 | /* The current saved history number from operate-and-get-next. |
| 872 | This is -1 if not valid. */ |
| 873 | static int operate_saved_history = -1; |
| 874 | |
| 875 | /* This is put on the appropriate hook and helps operate-and-get-next |
| 876 | do its work. */ |
| 877 | static void |
| 878 | gdb_rl_operate_and_get_next_completion (void) |
| 879 | { |
| 880 | int delta = where_history () - operate_saved_history; |
| 881 | |
| 882 | /* The `key' argument to rl_get_previous_history is ignored. */ |
| 883 | rl_get_previous_history (delta, 0); |
| 884 | operate_saved_history = -1; |
| 885 | |
| 886 | /* readline doesn't automatically update the display for us. */ |
| 887 | rl_redisplay (); |
| 888 | |
| 889 | after_char_processing_hook = NULL; |
| 890 | rl_pre_input_hook = NULL; |
| 891 | } |
| 892 | |
| 893 | /* This is a gdb-local readline command handler. It accepts the |
| 894 | current command line (like RET does) and, if this command was taken |
| 895 | from the history, arranges for the next command in the history to |
| 896 | appear on the command line when the prompt returns. |
| 897 | We ignore the arguments. */ |
| 898 | static int |
| 899 | gdb_rl_operate_and_get_next (int count, int key) |
| 900 | { |
| 901 | int where; |
| 902 | |
| 903 | /* Use the async hook. */ |
| 904 | after_char_processing_hook = gdb_rl_operate_and_get_next_completion; |
| 905 | |
| 906 | /* Find the current line, and find the next line to use. */ |
| 907 | where = where_history(); |
| 908 | |
| 909 | if ((history_is_stifled () && (history_length >= history_max_entries)) |
| 910 | || (where >= history_length - 1)) |
| 911 | operate_saved_history = where; |
| 912 | else |
| 913 | operate_saved_history = where + 1; |
| 914 | |
| 915 | return rl_newline (1, key); |
| 916 | } |
| 917 | |
| 918 | /* Number of user commands executed during this session. */ |
| 919 | |
| 920 | static int command_count = 0; |
| 921 | |
| 922 | /* Add the user command COMMAND to the input history list. */ |
| 923 | |
| 924 | void |
| 925 | gdb_add_history (const char *command) |
| 926 | { |
| 927 | command_count++; |
| 928 | |
| 929 | if (history_remove_duplicates != 0) |
| 930 | { |
| 931 | int lookbehind; |
| 932 | int lookbehind_threshold; |
| 933 | |
| 934 | /* The lookbehind threshold for finding a duplicate history entry is |
| 935 | bounded by command_count because we can't meaningfully delete |
| 936 | history entries that are already stored in the history file since |
| 937 | the history file is appended to. */ |
| 938 | if (history_remove_duplicates == -1 |
| 939 | || history_remove_duplicates > command_count) |
| 940 | lookbehind_threshold = command_count; |
| 941 | else |
| 942 | lookbehind_threshold = history_remove_duplicates; |
| 943 | |
| 944 | using_history (); |
| 945 | for (lookbehind = 0; lookbehind < lookbehind_threshold; lookbehind++) |
| 946 | { |
| 947 | HIST_ENTRY *temp = previous_history (); |
| 948 | |
| 949 | if (temp == NULL) |
| 950 | break; |
| 951 | |
| 952 | if (strcmp (temp->line, command) == 0) |
| 953 | { |
| 954 | HIST_ENTRY *prev = remove_history (where_history ()); |
| 955 | command_count--; |
| 956 | free_history_entry (prev); |
| 957 | break; |
| 958 | } |
| 959 | } |
| 960 | using_history (); |
| 961 | } |
| 962 | |
| 963 | add_history (command); |
| 964 | } |
| 965 | |
| 966 | /* Safely append new history entries to the history file in a corruption-free |
| 967 | way using an intermediate local history file. */ |
| 968 | |
| 969 | static void |
| 970 | gdb_safe_append_history (void) |
| 971 | { |
| 972 | int ret, saved_errno; |
| 973 | char *local_history_filename; |
| 974 | struct cleanup *old_chain; |
| 975 | |
| 976 | local_history_filename |
| 977 | = xstrprintf ("%s-gdb%d~", history_filename, getpid ()); |
| 978 | old_chain = make_cleanup (xfree, local_history_filename); |
| 979 | |
| 980 | ret = rename (history_filename, local_history_filename); |
| 981 | saved_errno = errno; |
| 982 | if (ret < 0 && saved_errno != ENOENT) |
| 983 | { |
| 984 | warning (_("Could not rename %s to %s: %s"), |
| 985 | history_filename, local_history_filename, |
| 986 | safe_strerror (saved_errno)); |
| 987 | } |
| 988 | else |
| 989 | { |
| 990 | if (ret < 0) |
| 991 | { |
| 992 | /* If the rename failed with ENOENT then either the global history |
| 993 | file never existed in the first place or another GDB process is |
| 994 | currently appending to it (and has thus temporarily renamed it). |
| 995 | Since we can't distinguish between these two cases, we have to |
| 996 | conservatively assume the first case and therefore must write out |
| 997 | (not append) our known history to our local history file and try |
| 998 | to move it back anyway. Otherwise a global history file would |
| 999 | never get created! */ |
| 1000 | gdb_assert (saved_errno == ENOENT); |
| 1001 | write_history (local_history_filename); |
| 1002 | } |
| 1003 | else |
| 1004 | { |
| 1005 | append_history (command_count, local_history_filename); |
| 1006 | if (history_is_stifled ()) |
| 1007 | history_truncate_file (local_history_filename, history_max_entries); |
| 1008 | } |
| 1009 | |
| 1010 | ret = rename (local_history_filename, history_filename); |
| 1011 | saved_errno = errno; |
| 1012 | if (ret < 0 && saved_errno != EEXIST) |
| 1013 | warning (_("Could not rename %s to %s: %s"), |
| 1014 | local_history_filename, history_filename, |
| 1015 | safe_strerror (saved_errno)); |
| 1016 | } |
| 1017 | |
| 1018 | do_cleanups (old_chain); |
| 1019 | } |
| 1020 | |
| 1021 | /* Read one line from the command input stream `instream' |
| 1022 | into the local static buffer `linebuffer' (whose current length |
| 1023 | is `linelength'). |
| 1024 | The buffer is made bigger as necessary. |
| 1025 | Returns the address of the start of the line. |
| 1026 | |
| 1027 | NULL is returned for end of file. |
| 1028 | |
| 1029 | *If* the instream == stdin & stdin is a terminal, the line read |
| 1030 | is copied into the file line saver (global var char *line, |
| 1031 | length linesize) so that it can be duplicated. |
| 1032 | |
| 1033 | This routine either uses fancy command line editing or |
| 1034 | simple input as the user has requested. */ |
| 1035 | |
| 1036 | char * |
| 1037 | command_line_input (const char *prompt_arg, int repeat, char *annotation_suffix) |
| 1038 | { |
| 1039 | static char *linebuffer = 0; |
| 1040 | static unsigned linelength = 0; |
| 1041 | const char *prompt = prompt_arg; |
| 1042 | char *p; |
| 1043 | char *p1; |
| 1044 | char *rl; |
| 1045 | char *nline; |
| 1046 | char got_eof = 0; |
| 1047 | |
| 1048 | /* The annotation suffix must be non-NULL. */ |
| 1049 | if (annotation_suffix == NULL) |
| 1050 | annotation_suffix = ""; |
| 1051 | |
| 1052 | if (annotation_level > 1 && instream == stdin) |
| 1053 | { |
| 1054 | char *local_prompt; |
| 1055 | |
| 1056 | local_prompt |
| 1057 | = (char *) alloca ((prompt == NULL ? 0 : strlen (prompt)) |
| 1058 | + strlen (annotation_suffix) + 40); |
| 1059 | if (prompt == NULL) |
| 1060 | local_prompt[0] = '\0'; |
| 1061 | else |
| 1062 | strcpy (local_prompt, prompt); |
| 1063 | strcat (local_prompt, "\n\032\032"); |
| 1064 | strcat (local_prompt, annotation_suffix); |
| 1065 | strcat (local_prompt, "\n"); |
| 1066 | |
| 1067 | prompt = local_prompt; |
| 1068 | } |
| 1069 | |
| 1070 | if (linebuffer == 0) |
| 1071 | { |
| 1072 | linelength = 80; |
| 1073 | linebuffer = (char *) xmalloc (linelength); |
| 1074 | } |
| 1075 | |
| 1076 | p = linebuffer; |
| 1077 | |
| 1078 | /* Control-C quits instantly if typed while in this loop |
| 1079 | since it should not wait until the user types a newline. */ |
| 1080 | immediate_quit++; |
| 1081 | QUIT; |
| 1082 | #ifdef STOP_SIGNAL |
| 1083 | if (job_control) |
| 1084 | signal (STOP_SIGNAL, handle_stop_sig); |
| 1085 | #endif |
| 1086 | |
| 1087 | while (1) |
| 1088 | { |
| 1089 | /* Make sure that all output has been output. Some machines may |
| 1090 | let you get away with leaving out some of the gdb_flush, but |
| 1091 | not all. */ |
| 1092 | wrap_here (""); |
| 1093 | gdb_flush (gdb_stdout); |
| 1094 | gdb_flush (gdb_stderr); |
| 1095 | |
| 1096 | if (source_file_name != NULL) |
| 1097 | ++source_line_number; |
| 1098 | |
| 1099 | if (annotation_level > 1 && instream == stdin) |
| 1100 | { |
| 1101 | puts_unfiltered ("\n\032\032pre-"); |
| 1102 | puts_unfiltered (annotation_suffix); |
| 1103 | puts_unfiltered ("\n"); |
| 1104 | } |
| 1105 | |
| 1106 | /* Don't use fancy stuff if not talking to stdin. */ |
| 1107 | if (deprecated_readline_hook && input_from_terminal_p ()) |
| 1108 | { |
| 1109 | rl = (*deprecated_readline_hook) (prompt); |
| 1110 | } |
| 1111 | else if (command_editing_p && input_from_terminal_p ()) |
| 1112 | { |
| 1113 | rl = gdb_readline_wrapper (prompt); |
| 1114 | } |
| 1115 | else |
| 1116 | { |
| 1117 | rl = gdb_readline_no_editing (prompt); |
| 1118 | } |
| 1119 | |
| 1120 | if (annotation_level > 1 && instream == stdin) |
| 1121 | { |
| 1122 | puts_unfiltered ("\n\032\032post-"); |
| 1123 | puts_unfiltered (annotation_suffix); |
| 1124 | puts_unfiltered ("\n"); |
| 1125 | } |
| 1126 | |
| 1127 | if (!rl || rl == (char *) EOF) |
| 1128 | { |
| 1129 | got_eof = 1; |
| 1130 | break; |
| 1131 | } |
| 1132 | if (strlen (rl) + 1 + (p - linebuffer) > linelength) |
| 1133 | { |
| 1134 | linelength = strlen (rl) + 1 + (p - linebuffer); |
| 1135 | nline = (char *) xrealloc (linebuffer, linelength); |
| 1136 | p += nline - linebuffer; |
| 1137 | linebuffer = nline; |
| 1138 | } |
| 1139 | p1 = rl; |
| 1140 | /* Copy line. Don't copy null at end. (Leaves line alone |
| 1141 | if this was just a newline). */ |
| 1142 | while (*p1) |
| 1143 | *p++ = *p1++; |
| 1144 | |
| 1145 | xfree (rl); /* Allocated in readline. */ |
| 1146 | |
| 1147 | if (p == linebuffer || *(p - 1) != '\\') |
| 1148 | break; |
| 1149 | |
| 1150 | p--; /* Put on top of '\'. */ |
| 1151 | prompt = NULL; |
| 1152 | } |
| 1153 | |
| 1154 | #ifdef STOP_SIGNAL |
| 1155 | if (job_control) |
| 1156 | signal (STOP_SIGNAL, SIG_DFL); |
| 1157 | #endif |
| 1158 | immediate_quit--; |
| 1159 | |
| 1160 | if (got_eof) |
| 1161 | return NULL; |
| 1162 | |
| 1163 | #define SERVER_COMMAND_LENGTH 7 |
| 1164 | server_command = |
| 1165 | (p - linebuffer > SERVER_COMMAND_LENGTH) |
| 1166 | && strncmp (linebuffer, "server ", SERVER_COMMAND_LENGTH) == 0; |
| 1167 | if (server_command) |
| 1168 | { |
| 1169 | /* Note that we don't set `line'. Between this and the check in |
| 1170 | dont_repeat, this insures that repeating will still do the |
| 1171 | right thing. */ |
| 1172 | *p = '\0'; |
| 1173 | return linebuffer + SERVER_COMMAND_LENGTH; |
| 1174 | } |
| 1175 | |
| 1176 | /* Do history expansion if that is wished. */ |
| 1177 | if (history_expansion_p && instream == stdin |
| 1178 | && ISATTY (instream)) |
| 1179 | { |
| 1180 | char *history_value; |
| 1181 | int expanded; |
| 1182 | |
| 1183 | *p = '\0'; /* Insert null now. */ |
| 1184 | expanded = history_expand (linebuffer, &history_value); |
| 1185 | if (expanded) |
| 1186 | { |
| 1187 | /* Print the changes. */ |
| 1188 | printf_unfiltered ("%s\n", history_value); |
| 1189 | |
| 1190 | /* If there was an error, call this function again. */ |
| 1191 | if (expanded < 0) |
| 1192 | { |
| 1193 | xfree (history_value); |
| 1194 | return command_line_input (prompt, repeat, |
| 1195 | annotation_suffix); |
| 1196 | } |
| 1197 | if (strlen (history_value) > linelength) |
| 1198 | { |
| 1199 | linelength = strlen (history_value) + 1; |
| 1200 | linebuffer = (char *) xrealloc (linebuffer, linelength); |
| 1201 | } |
| 1202 | strcpy (linebuffer, history_value); |
| 1203 | p = linebuffer + strlen (linebuffer); |
| 1204 | } |
| 1205 | xfree (history_value); |
| 1206 | } |
| 1207 | |
| 1208 | /* If we just got an empty line, and that is supposed to repeat the |
| 1209 | previous command, return the value in the global buffer. */ |
| 1210 | if (repeat && p == linebuffer) |
| 1211 | return saved_command_line; |
| 1212 | for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++); |
| 1213 | if (repeat && !*p1) |
| 1214 | return saved_command_line; |
| 1215 | |
| 1216 | *p = 0; |
| 1217 | |
| 1218 | /* Add line to history if appropriate. */ |
| 1219 | if (*linebuffer && input_from_terminal_p ()) |
| 1220 | gdb_add_history (linebuffer); |
| 1221 | |
| 1222 | /* Save into global buffer if appropriate. */ |
| 1223 | if (repeat) |
| 1224 | { |
| 1225 | if (linelength > saved_command_line_size) |
| 1226 | { |
| 1227 | saved_command_line |
| 1228 | = (char *) xrealloc (saved_command_line, linelength); |
| 1229 | saved_command_line_size = linelength; |
| 1230 | } |
| 1231 | strcpy (saved_command_line, linebuffer); |
| 1232 | return saved_command_line; |
| 1233 | } |
| 1234 | |
| 1235 | return linebuffer; |
| 1236 | } |
| 1237 | \f |
| 1238 | /* Print the GDB banner. */ |
| 1239 | void |
| 1240 | print_gdb_version (struct ui_file *stream) |
| 1241 | { |
| 1242 | /* From GNU coding standards, first line is meant to be easy for a |
| 1243 | program to parse, and is just canonical program name and version |
| 1244 | number, which starts after last space. */ |
| 1245 | |
| 1246 | fprintf_filtered (stream, "GNU gdb %s%s\n", PKGVERSION, version); |
| 1247 | |
| 1248 | /* Second line is a copyright notice. */ |
| 1249 | |
| 1250 | fprintf_filtered (stream, |
| 1251 | "Copyright (C) 2016 Free Software Foundation, Inc.\n"); |
| 1252 | |
| 1253 | /* Following the copyright is a brief statement that the program is |
| 1254 | free software, that users are free to copy and change it on |
| 1255 | certain conditions, that it is covered by the GNU GPL, and that |
| 1256 | there is no warranty. */ |
| 1257 | |
| 1258 | fprintf_filtered (stream, "\ |
| 1259 | License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\ |
| 1260 | \nThis is free software: you are free to change and redistribute it.\n\ |
| 1261 | There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\ |
| 1262 | and \"show warranty\" for details.\n"); |
| 1263 | |
| 1264 | /* After the required info we print the configuration information. */ |
| 1265 | |
| 1266 | fprintf_filtered (stream, "This GDB was configured as \""); |
| 1267 | if (strcmp (host_name, target_name) != 0) |
| 1268 | { |
| 1269 | fprintf_filtered (stream, "--host=%s --target=%s", |
| 1270 | host_name, target_name); |
| 1271 | } |
| 1272 | else |
| 1273 | { |
| 1274 | fprintf_filtered (stream, "%s", host_name); |
| 1275 | } |
| 1276 | fprintf_filtered (stream, "\".\n\ |
| 1277 | Type \"show configuration\" for configuration details."); |
| 1278 | |
| 1279 | if (REPORT_BUGS_TO[0]) |
| 1280 | { |
| 1281 | fprintf_filtered (stream, |
| 1282 | _("\nFor bug reporting instructions, please see:\n")); |
| 1283 | fprintf_filtered (stream, "%s.\n", REPORT_BUGS_TO); |
| 1284 | } |
| 1285 | fprintf_filtered (stream, |
| 1286 | _("Find the GDB manual and other documentation \ |
| 1287 | resources online at:\n<http://www.gnu.org/software/gdb/documentation/>.\n")); |
| 1288 | fprintf_filtered (stream, _("For help, type \"help\".\n")); |
| 1289 | fprintf_filtered (stream, _("Type \"apropos word\" to search for \ |
| 1290 | commands related to \"word\".")); |
| 1291 | } |
| 1292 | |
| 1293 | /* Print the details of GDB build-time configuration. */ |
| 1294 | void |
| 1295 | print_gdb_configuration (struct ui_file *stream) |
| 1296 | { |
| 1297 | fprintf_filtered (stream, _("\ |
| 1298 | This GDB was configured as follows:\n\ |
| 1299 | configure --host=%s --target=%s\n\ |
| 1300 | "), host_name, target_name); |
| 1301 | fprintf_filtered (stream, _("\ |
| 1302 | --with-auto-load-dir=%s\n\ |
| 1303 | --with-auto-load-safe-path=%s\n\ |
| 1304 | "), AUTO_LOAD_DIR, AUTO_LOAD_SAFE_PATH); |
| 1305 | #if HAVE_LIBEXPAT |
| 1306 | fprintf_filtered (stream, _("\ |
| 1307 | --with-expat\n\ |
| 1308 | ")); |
| 1309 | #else |
| 1310 | fprintf_filtered (stream, _("\ |
| 1311 | --without-expat\n\ |
| 1312 | ")); |
| 1313 | #endif |
| 1314 | if (GDB_DATADIR[0]) |
| 1315 | fprintf_filtered (stream, _("\ |
| 1316 | --with-gdb-datadir=%s%s\n\ |
| 1317 | "), GDB_DATADIR, GDB_DATADIR_RELOCATABLE ? " (relocatable)" : ""); |
| 1318 | #ifdef ICONV_BIN |
| 1319 | fprintf_filtered (stream, _("\ |
| 1320 | --with-iconv-bin=%s%s\n\ |
| 1321 | "), ICONV_BIN, ICONV_BIN_RELOCATABLE ? " (relocatable)" : ""); |
| 1322 | #endif |
| 1323 | if (JIT_READER_DIR[0]) |
| 1324 | fprintf_filtered (stream, _("\ |
| 1325 | --with-jit-reader-dir=%s%s\n\ |
| 1326 | "), JIT_READER_DIR, JIT_READER_DIR_RELOCATABLE ? " (relocatable)" : ""); |
| 1327 | #if HAVE_LIBUNWIND_IA64_H |
| 1328 | fprintf_filtered (stream, _("\ |
| 1329 | --with-libunwind-ia64\n\ |
| 1330 | ")); |
| 1331 | #else |
| 1332 | fprintf_filtered (stream, _("\ |
| 1333 | --without-libunwind-ia64\n\ |
| 1334 | ")); |
| 1335 | #endif |
| 1336 | #if HAVE_LIBLZMA |
| 1337 | fprintf_filtered (stream, _("\ |
| 1338 | --with-lzma\n\ |
| 1339 | ")); |
| 1340 | #else |
| 1341 | fprintf_filtered (stream, _("\ |
| 1342 | --without-lzma\n\ |
| 1343 | ")); |
| 1344 | #endif |
| 1345 | #ifdef WITH_PYTHON_PATH |
| 1346 | fprintf_filtered (stream, _("\ |
| 1347 | --with-python=%s%s\n\ |
| 1348 | "), WITH_PYTHON_PATH, PYTHON_PATH_RELOCATABLE ? " (relocatable)" : ""); |
| 1349 | #endif |
| 1350 | #if HAVE_GUILE |
| 1351 | fprintf_filtered (stream, _("\ |
| 1352 | --with-guile\n\ |
| 1353 | ")); |
| 1354 | #else |
| 1355 | fprintf_filtered (stream, _("\ |
| 1356 | --without-guile\n\ |
| 1357 | ")); |
| 1358 | #endif |
| 1359 | #ifdef RELOC_SRCDIR |
| 1360 | fprintf_filtered (stream, _("\ |
| 1361 | --with-relocated-sources=%s\n\ |
| 1362 | "), RELOC_SRCDIR); |
| 1363 | #endif |
| 1364 | if (DEBUGDIR[0]) |
| 1365 | fprintf_filtered (stream, _("\ |
| 1366 | --with-separate-debug-dir=%s%s\n\ |
| 1367 | "), DEBUGDIR, DEBUGDIR_RELOCATABLE ? " (relocatable)" : ""); |
| 1368 | if (TARGET_SYSTEM_ROOT[0]) |
| 1369 | fprintf_filtered (stream, _("\ |
| 1370 | --with-sysroot=%s%s\n\ |
| 1371 | "), TARGET_SYSTEM_ROOT, TARGET_SYSTEM_ROOT_RELOCATABLE ? " (relocatable)" : ""); |
| 1372 | if (SYSTEM_GDBINIT[0]) |
| 1373 | fprintf_filtered (stream, _("\ |
| 1374 | --with-system-gdbinit=%s%s\n\ |
| 1375 | "), SYSTEM_GDBINIT, SYSTEM_GDBINIT_RELOCATABLE ? " (relocatable)" : ""); |
| 1376 | #if HAVE_LIBBABELTRACE |
| 1377 | fprintf_filtered (stream, _("\ |
| 1378 | --with-babeltrace\n\ |
| 1379 | ")); |
| 1380 | #else |
| 1381 | fprintf_filtered (stream, _("\ |
| 1382 | --without-babeltrace\n\ |
| 1383 | ")); |
| 1384 | #endif |
| 1385 | /* We assume "relocatable" will be printed at least once, thus we always |
| 1386 | print this text. It's a reasonably safe assumption for now. */ |
| 1387 | fprintf_filtered (stream, _("\n\ |
| 1388 | (\"Relocatable\" means the directory can be moved with the GDB installation\n\ |
| 1389 | tree, and GDB will still find it.)\n\ |
| 1390 | ")); |
| 1391 | } |
| 1392 | \f |
| 1393 | |
| 1394 | /* The current top level prompt, settable with "set prompt", and/or |
| 1395 | with the python `gdb.prompt_hook' hook. */ |
| 1396 | static char *top_prompt; |
| 1397 | |
| 1398 | /* Access method for the GDB prompt string. */ |
| 1399 | |
| 1400 | char * |
| 1401 | get_prompt (void) |
| 1402 | { |
| 1403 | return top_prompt; |
| 1404 | } |
| 1405 | |
| 1406 | /* Set method for the GDB prompt string. */ |
| 1407 | |
| 1408 | void |
| 1409 | set_prompt (const char *s) |
| 1410 | { |
| 1411 | char *p = xstrdup (s); |
| 1412 | |
| 1413 | xfree (top_prompt); |
| 1414 | top_prompt = p; |
| 1415 | } |
| 1416 | \f |
| 1417 | |
| 1418 | struct qt_args |
| 1419 | { |
| 1420 | char *args; |
| 1421 | int from_tty; |
| 1422 | }; |
| 1423 | |
| 1424 | /* Callback for iterate_over_inferiors. Kills or detaches the given |
| 1425 | inferior, depending on how we originally gained control of it. */ |
| 1426 | |
| 1427 | static int |
| 1428 | kill_or_detach (struct inferior *inf, void *args) |
| 1429 | { |
| 1430 | struct qt_args *qt = (struct qt_args *) args; |
| 1431 | struct thread_info *thread; |
| 1432 | |
| 1433 | if (inf->pid == 0) |
| 1434 | return 0; |
| 1435 | |
| 1436 | thread = any_thread_of_process (inf->pid); |
| 1437 | if (thread != NULL) |
| 1438 | { |
| 1439 | switch_to_thread (thread->ptid); |
| 1440 | |
| 1441 | /* Leave core files alone. */ |
| 1442 | if (target_has_execution) |
| 1443 | { |
| 1444 | if (inf->attach_flag) |
| 1445 | target_detach (qt->args, qt->from_tty); |
| 1446 | else |
| 1447 | target_kill (); |
| 1448 | } |
| 1449 | } |
| 1450 | |
| 1451 | return 0; |
| 1452 | } |
| 1453 | |
| 1454 | /* Callback for iterate_over_inferiors. Prints info about what GDB |
| 1455 | will do to each inferior on a "quit". ARG points to a struct |
| 1456 | ui_out where output is to be collected. */ |
| 1457 | |
| 1458 | static int |
| 1459 | print_inferior_quit_action (struct inferior *inf, void *arg) |
| 1460 | { |
| 1461 | struct ui_file *stb = (struct ui_file *) arg; |
| 1462 | |
| 1463 | if (inf->pid == 0) |
| 1464 | return 0; |
| 1465 | |
| 1466 | if (inf->attach_flag) |
| 1467 | fprintf_filtered (stb, |
| 1468 | _("\tInferior %d [%s] will be detached.\n"), inf->num, |
| 1469 | target_pid_to_str (pid_to_ptid (inf->pid))); |
| 1470 | else |
| 1471 | fprintf_filtered (stb, |
| 1472 | _("\tInferior %d [%s] will be killed.\n"), inf->num, |
| 1473 | target_pid_to_str (pid_to_ptid (inf->pid))); |
| 1474 | |
| 1475 | return 0; |
| 1476 | } |
| 1477 | |
| 1478 | /* If necessary, make the user confirm that we should quit. Return |
| 1479 | non-zero if we should quit, zero if we shouldn't. */ |
| 1480 | |
| 1481 | int |
| 1482 | quit_confirm (void) |
| 1483 | { |
| 1484 | struct ui_file *stb; |
| 1485 | struct cleanup *old_chain; |
| 1486 | char *str; |
| 1487 | int qr; |
| 1488 | |
| 1489 | /* Don't even ask if we're only debugging a core file inferior. */ |
| 1490 | if (!have_live_inferiors ()) |
| 1491 | return 1; |
| 1492 | |
| 1493 | /* Build the query string as a single string. */ |
| 1494 | stb = mem_fileopen (); |
| 1495 | old_chain = make_cleanup_ui_file_delete (stb); |
| 1496 | |
| 1497 | fprintf_filtered (stb, _("A debugging session is active.\n\n")); |
| 1498 | iterate_over_inferiors (print_inferior_quit_action, stb); |
| 1499 | fprintf_filtered (stb, _("\nQuit anyway? ")); |
| 1500 | |
| 1501 | str = ui_file_xstrdup (stb, NULL); |
| 1502 | make_cleanup (xfree, str); |
| 1503 | |
| 1504 | qr = query ("%s", str); |
| 1505 | do_cleanups (old_chain); |
| 1506 | return qr; |
| 1507 | } |
| 1508 | |
| 1509 | /* Prepare to exit GDB cleanly by undoing any changes made to the |
| 1510 | terminal so that we leave the terminal in the state we acquired it. */ |
| 1511 | |
| 1512 | static void |
| 1513 | undo_terminal_modifications_before_exit (void) |
| 1514 | { |
| 1515 | target_terminal_ours (); |
| 1516 | #if defined(TUI) |
| 1517 | tui_disable (); |
| 1518 | #endif |
| 1519 | if (async_command_editing_p) |
| 1520 | gdb_disable_readline (); |
| 1521 | } |
| 1522 | |
| 1523 | |
| 1524 | /* Quit without asking for confirmation. */ |
| 1525 | |
| 1526 | void |
| 1527 | quit_force (char *args, int from_tty) |
| 1528 | { |
| 1529 | int exit_code = 0; |
| 1530 | struct qt_args qt; |
| 1531 | |
| 1532 | undo_terminal_modifications_before_exit (); |
| 1533 | |
| 1534 | /* An optional expression may be used to cause gdb to terminate with the |
| 1535 | value of that expression. */ |
| 1536 | if (args) |
| 1537 | { |
| 1538 | struct value *val = parse_and_eval (args); |
| 1539 | |
| 1540 | exit_code = (int) value_as_long (val); |
| 1541 | } |
| 1542 | else if (return_child_result) |
| 1543 | exit_code = return_child_result_value; |
| 1544 | |
| 1545 | qt.args = args; |
| 1546 | qt.from_tty = from_tty; |
| 1547 | |
| 1548 | /* We want to handle any quit errors and exit regardless. */ |
| 1549 | |
| 1550 | /* Get out of tfind mode, and kill or detach all inferiors. */ |
| 1551 | TRY |
| 1552 | { |
| 1553 | disconnect_tracing (); |
| 1554 | iterate_over_inferiors (kill_or_detach, &qt); |
| 1555 | } |
| 1556 | CATCH (ex, RETURN_MASK_ALL) |
| 1557 | { |
| 1558 | exception_print (gdb_stderr, ex); |
| 1559 | } |
| 1560 | END_CATCH |
| 1561 | |
| 1562 | /* Give all pushed targets a chance to do minimal cleanup, and pop |
| 1563 | them all out. */ |
| 1564 | TRY |
| 1565 | { |
| 1566 | pop_all_targets (); |
| 1567 | } |
| 1568 | CATCH (ex, RETURN_MASK_ALL) |
| 1569 | { |
| 1570 | exception_print (gdb_stderr, ex); |
| 1571 | } |
| 1572 | END_CATCH |
| 1573 | |
| 1574 | /* Save the history information if it is appropriate to do so. */ |
| 1575 | TRY |
| 1576 | { |
| 1577 | if (write_history_p && history_filename |
| 1578 | && input_from_terminal_p ()) |
| 1579 | gdb_safe_append_history (); |
| 1580 | } |
| 1581 | CATCH (ex, RETURN_MASK_ALL) |
| 1582 | { |
| 1583 | exception_print (gdb_stderr, ex); |
| 1584 | } |
| 1585 | END_CATCH |
| 1586 | |
| 1587 | /* Do any final cleanups before exiting. */ |
| 1588 | TRY |
| 1589 | { |
| 1590 | do_final_cleanups (all_cleanups ()); |
| 1591 | } |
| 1592 | CATCH (ex, RETURN_MASK_ALL) |
| 1593 | { |
| 1594 | exception_print (gdb_stderr, ex); |
| 1595 | } |
| 1596 | END_CATCH |
| 1597 | |
| 1598 | exit (exit_code); |
| 1599 | } |
| 1600 | |
| 1601 | /* Returns whether GDB is running on a terminal and input is |
| 1602 | currently coming from that terminal. */ |
| 1603 | |
| 1604 | int |
| 1605 | input_from_terminal_p (void) |
| 1606 | { |
| 1607 | if (batch_flag) |
| 1608 | return 0; |
| 1609 | |
| 1610 | if (gdb_has_a_terminal () && instream == stdin) |
| 1611 | return 1; |
| 1612 | |
| 1613 | /* If INSTREAM is unset, and we are not in a user command, we |
| 1614 | must be in Insight. That's like having a terminal, for our |
| 1615 | purposes. */ |
| 1616 | if (instream == NULL && !in_user_command) |
| 1617 | return 1; |
| 1618 | |
| 1619 | return 0; |
| 1620 | } |
| 1621 | \f |
| 1622 | static void |
| 1623 | dont_repeat_command (char *ignored, int from_tty) |
| 1624 | { |
| 1625 | /* Can't call dont_repeat here because we're not necessarily reading |
| 1626 | from stdin. */ |
| 1627 | *saved_command_line = 0; |
| 1628 | } |
| 1629 | \f |
| 1630 | /* Functions to manipulate command line editing control variables. */ |
| 1631 | |
| 1632 | /* Number of commands to print in each call to show_commands. */ |
| 1633 | #define Hist_print 10 |
| 1634 | void |
| 1635 | show_commands (char *args, int from_tty) |
| 1636 | { |
| 1637 | /* Index for history commands. Relative to history_base. */ |
| 1638 | int offset; |
| 1639 | |
| 1640 | /* Number of the history entry which we are planning to display next. |
| 1641 | Relative to history_base. */ |
| 1642 | static int num = 0; |
| 1643 | |
| 1644 | /* Print out some of the commands from the command history. */ |
| 1645 | |
| 1646 | if (args) |
| 1647 | { |
| 1648 | if (args[0] == '+' && args[1] == '\0') |
| 1649 | /* "info editing +" should print from the stored position. */ |
| 1650 | ; |
| 1651 | else |
| 1652 | /* "info editing <exp>" should print around command number <exp>. */ |
| 1653 | num = (parse_and_eval_long (args) - history_base) - Hist_print / 2; |
| 1654 | } |
| 1655 | /* "show commands" means print the last Hist_print commands. */ |
| 1656 | else |
| 1657 | { |
| 1658 | num = history_length - Hist_print; |
| 1659 | } |
| 1660 | |
| 1661 | if (num < 0) |
| 1662 | num = 0; |
| 1663 | |
| 1664 | /* If there are at least Hist_print commands, we want to display the last |
| 1665 | Hist_print rather than, say, the last 6. */ |
| 1666 | if (history_length - num < Hist_print) |
| 1667 | { |
| 1668 | num = history_length - Hist_print; |
| 1669 | if (num < 0) |
| 1670 | num = 0; |
| 1671 | } |
| 1672 | |
| 1673 | for (offset = num; |
| 1674 | offset < num + Hist_print && offset < history_length; |
| 1675 | offset++) |
| 1676 | { |
| 1677 | printf_filtered ("%5d %s\n", history_base + offset, |
| 1678 | (history_get (history_base + offset))->line); |
| 1679 | } |
| 1680 | |
| 1681 | /* The next command we want to display is the next one that we haven't |
| 1682 | displayed yet. */ |
| 1683 | num += Hist_print; |
| 1684 | |
| 1685 | /* If the user repeats this command with return, it should do what |
| 1686 | "show commands +" does. This is unnecessary if arg is null, |
| 1687 | because "show commands +" is not useful after "show commands". */ |
| 1688 | if (from_tty && args) |
| 1689 | { |
| 1690 | args[0] = '+'; |
| 1691 | args[1] = '\0'; |
| 1692 | } |
| 1693 | } |
| 1694 | |
| 1695 | /* Update the size of our command history file to HISTORY_SIZE. |
| 1696 | |
| 1697 | A HISTORY_SIZE of -1 stands for unlimited. */ |
| 1698 | |
| 1699 | static void |
| 1700 | set_readline_history_size (int history_size) |
| 1701 | { |
| 1702 | gdb_assert (history_size >= -1); |
| 1703 | |
| 1704 | if (history_size == -1) |
| 1705 | unstifle_history (); |
| 1706 | else |
| 1707 | stifle_history (history_size); |
| 1708 | } |
| 1709 | |
| 1710 | /* Called by do_setshow_command. */ |
| 1711 | static void |
| 1712 | set_history_size_command (char *args, int from_tty, struct cmd_list_element *c) |
| 1713 | { |
| 1714 | set_readline_history_size (history_size_setshow_var); |
| 1715 | } |
| 1716 | |
| 1717 | void |
| 1718 | set_history (char *args, int from_tty) |
| 1719 | { |
| 1720 | printf_unfiltered (_("\"set history\" must be followed " |
| 1721 | "by the name of a history subcommand.\n")); |
| 1722 | help_list (sethistlist, "set history ", all_commands, gdb_stdout); |
| 1723 | } |
| 1724 | |
| 1725 | void |
| 1726 | show_history (char *args, int from_tty) |
| 1727 | { |
| 1728 | cmd_show_list (showhistlist, from_tty, ""); |
| 1729 | } |
| 1730 | |
| 1731 | int info_verbose = 0; /* Default verbose msgs off. */ |
| 1732 | |
| 1733 | /* Called by do_setshow_command. An elaborate joke. */ |
| 1734 | void |
| 1735 | set_verbose (char *args, int from_tty, struct cmd_list_element *c) |
| 1736 | { |
| 1737 | const char *cmdname = "verbose"; |
| 1738 | struct cmd_list_element *showcmd; |
| 1739 | |
| 1740 | showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1); |
| 1741 | gdb_assert (showcmd != NULL && showcmd != CMD_LIST_AMBIGUOUS); |
| 1742 | |
| 1743 | if (info_verbose) |
| 1744 | { |
| 1745 | c->doc = "Set verbose printing of informational messages."; |
| 1746 | showcmd->doc = "Show verbose printing of informational messages."; |
| 1747 | } |
| 1748 | else |
| 1749 | { |
| 1750 | c->doc = "Set verbosity."; |
| 1751 | showcmd->doc = "Show verbosity."; |
| 1752 | } |
| 1753 | } |
| 1754 | |
| 1755 | /* Init the history buffer. Note that we are called after the init file(s) |
| 1756 | have been read so that the user can change the history file via his |
| 1757 | .gdbinit file (for instance). The GDBHISTFILE environment variable |
| 1758 | overrides all of this. */ |
| 1759 | |
| 1760 | void |
| 1761 | init_history (void) |
| 1762 | { |
| 1763 | char *tmpenv; |
| 1764 | |
| 1765 | tmpenv = getenv ("GDBHISTSIZE"); |
| 1766 | if (tmpenv) |
| 1767 | { |
| 1768 | long var; |
| 1769 | int saved_errno; |
| 1770 | char *endptr; |
| 1771 | |
| 1772 | tmpenv = skip_spaces (tmpenv); |
| 1773 | errno = 0; |
| 1774 | var = strtol (tmpenv, &endptr, 10); |
| 1775 | saved_errno = errno; |
| 1776 | endptr = skip_spaces (endptr); |
| 1777 | |
| 1778 | /* If GDBHISTSIZE is non-numeric then ignore it. If GDBHISTSIZE is the |
| 1779 | empty string, a negative number or a huge positive number (larger than |
| 1780 | INT_MAX) then set the history size to unlimited. Otherwise set our |
| 1781 | history size to the number we have read. This behavior is consistent |
| 1782 | with how bash handles HISTSIZE. */ |
| 1783 | if (*endptr != '\0') |
| 1784 | ; |
| 1785 | else if (*tmpenv == '\0' |
| 1786 | || var < 0 |
| 1787 | || var > INT_MAX |
| 1788 | /* On targets where INT_MAX == LONG_MAX, we have to look at |
| 1789 | errno after calling strtol to distinguish between a value that |
| 1790 | is exactly INT_MAX and an overflowing value that was clamped |
| 1791 | to INT_MAX. */ |
| 1792 | || (var == INT_MAX && saved_errno == ERANGE)) |
| 1793 | history_size_setshow_var = -1; |
| 1794 | else |
| 1795 | history_size_setshow_var = var; |
| 1796 | } |
| 1797 | |
| 1798 | /* If neither the init file nor GDBHISTSIZE has set a size yet, pick the |
| 1799 | default. */ |
| 1800 | if (history_size_setshow_var == -2) |
| 1801 | history_size_setshow_var = 256; |
| 1802 | |
| 1803 | set_readline_history_size (history_size_setshow_var); |
| 1804 | |
| 1805 | tmpenv = getenv ("GDBHISTFILE"); |
| 1806 | if (tmpenv) |
| 1807 | history_filename = xstrdup (tmpenv); |
| 1808 | else if (!history_filename) |
| 1809 | { |
| 1810 | /* We include the current directory so that if the user changes |
| 1811 | directories the file written will be the same as the one |
| 1812 | that was read. */ |
| 1813 | #ifdef __MSDOS__ |
| 1814 | /* No leading dots in file names are allowed on MSDOS. */ |
| 1815 | history_filename = concat (current_directory, "/_gdb_history", |
| 1816 | (char *)NULL); |
| 1817 | #else |
| 1818 | history_filename = concat (current_directory, "/.gdb_history", |
| 1819 | (char *)NULL); |
| 1820 | #endif |
| 1821 | } |
| 1822 | read_history (history_filename); |
| 1823 | } |
| 1824 | |
| 1825 | static void |
| 1826 | show_prompt (struct ui_file *file, int from_tty, |
| 1827 | struct cmd_list_element *c, const char *value) |
| 1828 | { |
| 1829 | fprintf_filtered (file, _("Gdb's prompt is \"%s\".\n"), value); |
| 1830 | } |
| 1831 | |
| 1832 | static void |
| 1833 | show_async_command_editing_p (struct ui_file *file, int from_tty, |
| 1834 | struct cmd_list_element *c, const char *value) |
| 1835 | { |
| 1836 | fprintf_filtered (file, _("Editing of command lines as " |
| 1837 | "they are typed is %s.\n"), |
| 1838 | value); |
| 1839 | } |
| 1840 | |
| 1841 | static void |
| 1842 | show_annotation_level (struct ui_file *file, int from_tty, |
| 1843 | struct cmd_list_element *c, const char *value) |
| 1844 | { |
| 1845 | fprintf_filtered (file, _("Annotation_level is %s.\n"), value); |
| 1846 | } |
| 1847 | |
| 1848 | static void |
| 1849 | show_exec_done_display_p (struct ui_file *file, int from_tty, |
| 1850 | struct cmd_list_element *c, const char *value) |
| 1851 | { |
| 1852 | fprintf_filtered (file, _("Notification of completion for " |
| 1853 | "asynchronous execution commands is %s.\n"), |
| 1854 | value); |
| 1855 | } |
| 1856 | |
| 1857 | /* New values of the "data-directory" parameter are staged here. */ |
| 1858 | static char *staged_gdb_datadir; |
| 1859 | |
| 1860 | /* "set" command for the gdb_datadir configuration variable. */ |
| 1861 | |
| 1862 | static void |
| 1863 | set_gdb_datadir (char *args, int from_tty, struct cmd_list_element *c) |
| 1864 | { |
| 1865 | set_gdb_data_directory (staged_gdb_datadir); |
| 1866 | observer_notify_gdb_datadir_changed (); |
| 1867 | } |
| 1868 | |
| 1869 | /* "show" command for the gdb_datadir configuration variable. */ |
| 1870 | |
| 1871 | static void |
| 1872 | show_gdb_datadir (struct ui_file *file, int from_tty, |
| 1873 | struct cmd_list_element *c, const char *value) |
| 1874 | { |
| 1875 | fprintf_filtered (file, _("GDB's data directory is \"%s\".\n"), |
| 1876 | gdb_datadir); |
| 1877 | } |
| 1878 | |
| 1879 | static void |
| 1880 | set_history_filename (char *args, int from_tty, struct cmd_list_element *c) |
| 1881 | { |
| 1882 | /* We include the current directory so that if the user changes |
| 1883 | directories the file written will be the same as the one |
| 1884 | that was read. */ |
| 1885 | if (!IS_ABSOLUTE_PATH (history_filename)) |
| 1886 | history_filename = reconcat (history_filename, current_directory, "/", |
| 1887 | history_filename, (char *) NULL); |
| 1888 | } |
| 1889 | |
| 1890 | static void |
| 1891 | init_main (void) |
| 1892 | { |
| 1893 | /* Initialize the prompt to a simple "(gdb) " prompt or to whatever |
| 1894 | the DEFAULT_PROMPT is. */ |
| 1895 | set_prompt (DEFAULT_PROMPT); |
| 1896 | |
| 1897 | /* Set the important stuff up for command editing. */ |
| 1898 | command_editing_p = 1; |
| 1899 | history_expansion_p = 0; |
| 1900 | write_history_p = 0; |
| 1901 | |
| 1902 | /* Setup important stuff for command line editing. */ |
| 1903 | rl_completion_word_break_hook = gdb_completion_word_break_characters; |
| 1904 | rl_completion_entry_function = readline_line_completion_function; |
| 1905 | rl_completer_word_break_characters = default_word_break_characters (); |
| 1906 | rl_completer_quote_characters = get_gdb_completer_quote_characters (); |
| 1907 | rl_completion_display_matches_hook = cli_display_match_list; |
| 1908 | rl_readline_name = "gdb"; |
| 1909 | rl_terminal_name = getenv ("TERM"); |
| 1910 | |
| 1911 | /* The name for this defun comes from Bash, where it originated. |
| 1912 | 15 is Control-o, the same binding this function has in Bash. */ |
| 1913 | rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15); |
| 1914 | |
| 1915 | add_setshow_string_cmd ("prompt", class_support, |
| 1916 | &top_prompt, |
| 1917 | _("Set gdb's prompt"), |
| 1918 | _("Show gdb's prompt"), |
| 1919 | NULL, NULL, |
| 1920 | show_prompt, |
| 1921 | &setlist, &showlist); |
| 1922 | |
| 1923 | add_com ("dont-repeat", class_support, dont_repeat_command, _("\ |
| 1924 | Don't repeat this command.\nPrimarily \ |
| 1925 | used inside of user-defined commands that should not be repeated when\n\ |
| 1926 | hitting return.")); |
| 1927 | |
| 1928 | add_setshow_boolean_cmd ("editing", class_support, |
| 1929 | &async_command_editing_p, _("\ |
| 1930 | Set editing of command lines as they are typed."), _("\ |
| 1931 | Show editing of command lines as they are typed."), _("\ |
| 1932 | Use \"on\" to enable the editing, and \"off\" to disable it.\n\ |
| 1933 | Without an argument, command line editing is enabled. To edit, use\n\ |
| 1934 | EMACS-like or VI-like commands like control-P or ESC."), |
| 1935 | set_async_editing_command, |
| 1936 | show_async_command_editing_p, |
| 1937 | &setlist, &showlist); |
| 1938 | |
| 1939 | add_setshow_boolean_cmd ("save", no_class, &write_history_p, _("\ |
| 1940 | Set saving of the history record on exit."), _("\ |
| 1941 | Show saving of the history record on exit."), _("\ |
| 1942 | Use \"on\" to enable the saving, and \"off\" to disable it.\n\ |
| 1943 | Without an argument, saving is enabled."), |
| 1944 | NULL, |
| 1945 | show_write_history_p, |
| 1946 | &sethistlist, &showhistlist); |
| 1947 | |
| 1948 | add_setshow_zuinteger_unlimited_cmd ("size", no_class, |
| 1949 | &history_size_setshow_var, _("\ |
| 1950 | Set the size of the command history,"), _("\ |
| 1951 | Show the size of the command history,"), _("\ |
| 1952 | ie. the number of previous commands to keep a record of.\n\ |
| 1953 | If set to \"unlimited\", the number of commands kept in the history\n\ |
| 1954 | list is unlimited. This defaults to the value of the environment\n\ |
| 1955 | variable \"GDBHISTSIZE\", or to 256 if this variable is not set."), |
| 1956 | set_history_size_command, |
| 1957 | show_history_size, |
| 1958 | &sethistlist, &showhistlist); |
| 1959 | |
| 1960 | add_setshow_zuinteger_unlimited_cmd ("remove-duplicates", no_class, |
| 1961 | &history_remove_duplicates, _("\ |
| 1962 | Set how far back in history to look for and remove duplicate entries."), _("\ |
| 1963 | Show how far back in history to look for and remove duplicate entries."), _("\ |
| 1964 | If set to a nonzero value N, GDB will look back at the last N history entries\n\ |
| 1965 | and remove the first history entry that is a duplicate of the most recent\n\ |
| 1966 | entry, each time a new history entry is added.\n\ |
| 1967 | If set to \"unlimited\", this lookbehind is unbounded.\n\ |
| 1968 | Only history entries added during this session are considered for removal.\n\ |
| 1969 | If set to 0, removal of duplicate history entries is disabled.\n\ |
| 1970 | By default this option is set to 0."), |
| 1971 | NULL, |
| 1972 | show_history_remove_duplicates, |
| 1973 | &sethistlist, &showhistlist); |
| 1974 | |
| 1975 | add_setshow_filename_cmd ("filename", no_class, &history_filename, _("\ |
| 1976 | Set the filename in which to record the command history"), _("\ |
| 1977 | Show the filename in which to record the command history"), _("\ |
| 1978 | (the list of previous commands of which a record is kept)."), |
| 1979 | set_history_filename, |
| 1980 | show_history_filename, |
| 1981 | &sethistlist, &showhistlist); |
| 1982 | |
| 1983 | add_setshow_boolean_cmd ("confirm", class_support, &confirm, _("\ |
| 1984 | Set whether to confirm potentially dangerous operations."), _("\ |
| 1985 | Show whether to confirm potentially dangerous operations."), NULL, |
| 1986 | NULL, |
| 1987 | show_confirm, |
| 1988 | &setlist, &showlist); |
| 1989 | |
| 1990 | add_setshow_zinteger_cmd ("annotate", class_obscure, &annotation_level, _("\ |
| 1991 | Set annotation_level."), _("\ |
| 1992 | Show annotation_level."), _("\ |
| 1993 | 0 == normal; 1 == fullname (for use when running under emacs)\n\ |
| 1994 | 2 == output annotated suitably for use by programs that control GDB."), |
| 1995 | NULL, |
| 1996 | show_annotation_level, |
| 1997 | &setlist, &showlist); |
| 1998 | |
| 1999 | add_setshow_boolean_cmd ("exec-done-display", class_support, |
| 2000 | &exec_done_display_p, _("\ |
| 2001 | Set notification of completion for asynchronous execution commands."), _("\ |
| 2002 | Show notification of completion for asynchronous execution commands."), _("\ |
| 2003 | Use \"on\" to enable the notification, and \"off\" to disable it."), |
| 2004 | NULL, |
| 2005 | show_exec_done_display_p, |
| 2006 | &setlist, &showlist); |
| 2007 | |
| 2008 | add_setshow_filename_cmd ("data-directory", class_maintenance, |
| 2009 | &staged_gdb_datadir, _("Set GDB's data directory."), |
| 2010 | _("Show GDB's data directory."), |
| 2011 | _("\ |
| 2012 | When set, GDB uses the specified path to search for data files."), |
| 2013 | set_gdb_datadir, show_gdb_datadir, |
| 2014 | &setlist, |
| 2015 | &showlist); |
| 2016 | } |
| 2017 | |
| 2018 | void |
| 2019 | gdb_init (char *argv0) |
| 2020 | { |
| 2021 | if (pre_init_ui_hook) |
| 2022 | pre_init_ui_hook (); |
| 2023 | |
| 2024 | /* Run the init function of each source file. */ |
| 2025 | |
| 2026 | #ifdef __MSDOS__ |
| 2027 | /* Make sure we return to the original directory upon exit, come |
| 2028 | what may, since the OS doesn't do that for us. */ |
| 2029 | make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory)); |
| 2030 | #endif |
| 2031 | |
| 2032 | init_cmd_lists (); /* This needs to be done first. */ |
| 2033 | initialize_targets (); /* Setup target_terminal macros for utils.c. */ |
| 2034 | initialize_utils (); /* Make errors and warnings possible. */ |
| 2035 | |
| 2036 | init_page_info (); |
| 2037 | |
| 2038 | /* Here is where we call all the _initialize_foo routines. */ |
| 2039 | initialize_all_files (); |
| 2040 | |
| 2041 | /* This creates the current_program_space. Do this after all the |
| 2042 | _initialize_foo routines have had a chance to install their |
| 2043 | per-sspace data keys. Also do this before |
| 2044 | initialize_current_architecture is called, because it accesses |
| 2045 | exec_bfd of the current program space. */ |
| 2046 | initialize_progspace (); |
| 2047 | initialize_inferiors (); |
| 2048 | initialize_current_architecture (); |
| 2049 | init_cli_cmds(); |
| 2050 | init_main (); /* But that omits this file! Do it now. */ |
| 2051 | |
| 2052 | initialize_stdin_serial (); |
| 2053 | |
| 2054 | /* Take a snapshot of our tty state before readline/ncurses have had a chance |
| 2055 | to alter it. */ |
| 2056 | set_initial_gdb_ttystate (); |
| 2057 | |
| 2058 | async_init_signals (); |
| 2059 | |
| 2060 | /* We need a default language for parsing expressions, so simple |
| 2061 | things like "set width 0" won't fail if no language is explicitly |
| 2062 | set in a config file or implicitly set by reading an executable |
| 2063 | during startup. */ |
| 2064 | set_language (language_c); |
| 2065 | expected_language = current_language; /* Don't warn about the change. */ |
| 2066 | |
| 2067 | /* Python initialization, for example, can require various commands to be |
| 2068 | installed. For example "info pretty-printer" needs the "info" |
| 2069 | prefix to be installed. Keep things simple and just do final |
| 2070 | script initialization here. */ |
| 2071 | finish_ext_lang_initialization (); |
| 2072 | } |