1 /* Top level stuff for GDB, the GNU debugger. 2 3 Copyright (C) 1986-2013 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 "exceptions.h" 29 #include <signal.h> 30 #include "target.h" 31 #include "breakpoint.h" 32 #include "gdbtypes.h" 33 #include "expression.h" 34 #include "value.h" 35 #include "language.h" 36 #include "terminal.h" /* For job_control. */ 37 #include "annotate.h" 38 #include "completer.h" 39 #include "top.h" 40 #include "version.h" 41 #include "serial.h" 42 #include "doublest.h" 43 #include "gdb_assert.h" 44 #include "main.h" 45 #include "event-loop.h" 46 #include "gdbthread.h" 47 #include "python/python.h" 48 #include "interps.h" 49 #include "observer.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 extern void initialize_all_files (void); 68 69 #define PROMPT(X) the_prompts.prompt_stack[the_prompts.top + X].prompt 70 #define PREFIX(X) the_prompts.prompt_stack[the_prompts.top + X].prefix 71 #define SUFFIX(X) the_prompts.prompt_stack[the_prompts.top + X].suffix 72 73 /* Default command line prompt. This is overriden in some configs. */ 74 75 #ifndef DEFAULT_PROMPT 76 #define DEFAULT_PROMPT "(gdb) " 77 #endif 78 79 /* Initialization file name for gdb. This is overridden in some configs. */ 80 81 #ifndef PATH_MAX 82 # ifdef FILENAME_MAX 83 # define PATH_MAX FILENAME_MAX 84 # else 85 # define PATH_MAX 512 86 # endif 87 #endif 88 89 #ifndef GDBINIT_FILENAME 90 #define GDBINIT_FILENAME ".gdbinit" 91 #endif 92 char gdbinit[PATH_MAX + 1] = GDBINIT_FILENAME; 93 94 int inhibit_gdbinit = 0; 95 96 /* If nonzero, and GDB has been configured to be able to use windows, 97 attempt to open them upon startup. */ 98 99 int use_windows = 0; 100 101 extern char lang_frame_mismatch_warn[]; /* language.c */ 102 103 /* Flag for whether we want to confirm potentially dangerous 104 operations. Default is yes. */ 105 106 int confirm = 1; 107 108 static void 109 show_confirm (struct ui_file *file, int from_tty, 110 struct cmd_list_element *c, const char *value) 111 { 112 fprintf_filtered (file, _("Whether to confirm potentially " 113 "dangerous operations is %s.\n"), 114 value); 115 } 116 117 /* stdio stream that command input is being read from. Set to stdin 118 normally. Set by source_command to the file we are sourcing. Set 119 to NULL if we are executing a user-defined command or interacting 120 via a GUI. */ 121 122 FILE *instream; 123 124 /* Flag to indicate whether a user defined command is currently running. */ 125 126 int in_user_command; 127 128 /* Current working directory. */ 129 130 char *current_directory; 131 132 /* The directory name is actually stored here (usually). */ 133 char gdb_dirbuf[1024]; 134 135 /* Function to call before reading a command, if nonzero. 136 The function receives two args: an input stream, 137 and a prompt string. */ 138 139 void (*window_hook) (FILE *, char *); 140 141 /* Buffer used for reading command lines, and the size 142 allocated for it so far. */ 143 144 char *saved_command_line; 145 int saved_command_line_size = 100; 146 147 /* Nonzero if the current command is modified by "server ". This 148 affects things like recording into the command history, commands 149 repeating on RETURN, etc. This is so a user interface (emacs, GUI, 150 whatever) can issue its own commands and also send along commands 151 from the user, and have the user not notice that the user interface 152 is issuing commands too. */ 153 int server_command; 154 155 /* Baud rate specified for talking to serial target systems. Default 156 is left as -1, so targets can choose their own defaults. */ 157 /* FIXME: This means that "show remotebaud" and gr_files_info can 158 print -1 or (unsigned int)-1. This is a Bad User Interface. */ 159 160 int baud_rate = -1; 161 162 /* Timeout limit for response from target. */ 163 164 /* The default value has been changed many times over the years. It 165 was originally 5 seconds. But that was thought to be a long time 166 to sit and wait, so it was changed to 2 seconds. That was thought 167 to be plenty unless the connection was going through some terminal 168 server or multiplexer or other form of hairy serial connection. 169 170 In mid-1996, remote_timeout was moved from remote.c to top.c and 171 it began being used in other remote-* targets. It appears that the 172 default was changed to 20 seconds at that time, perhaps because the 173 Renesas E7000 ICE didn't always respond in a timely manner. 174 175 But if 5 seconds is a long time to sit and wait for retransmissions, 176 20 seconds is far worse. This demonstrates the difficulty of using 177 a single variable for all protocol timeouts. 178 179 As remote.c is used much more than remote-e7000.c, it was changed 180 back to 2 seconds in 1999. */ 181 182 int remote_timeout = 2; 183 184 /* Non-zero tells remote* modules to output debugging info. */ 185 186 int remote_debug = 0; 187 188 /* Sbrk location on entry to main. Used for statistics only. */ 189 #ifdef HAVE_SBRK 190 char *lim_at_start; 191 #endif 192 193 /* Hooks for alternate command interfaces. */ 194 195 /* Called after most modules have been initialized, but before taking 196 users command file. 197 198 If the UI fails to initialize and it wants GDB to continue using 199 the default UI, then it should clear this hook before returning. */ 200 201 void (*deprecated_init_ui_hook) (char *argv0); 202 203 /* This hook is called from within gdb's many mini-event loops which 204 could steal control from a real user interface's event loop. It 205 returns non-zero if the user is requesting a detach, zero 206 otherwise. */ 207 208 int (*deprecated_ui_loop_hook) (int); 209 210 /* Called instead of command_loop at top level. Can be invoked via 211 throw_exception(). */ 212 213 void (*deprecated_command_loop_hook) (void); 214 215 216 /* Called from print_frame_info to list the line we stopped in. */ 217 218 void (*deprecated_print_frame_info_listing_hook) (struct symtab * s, 219 int line, 220 int stopline, 221 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 253 damage, and to 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 /* Called when going to wait for the target. Usually allows the GUI 263 to run while waiting for target events. */ 264 265 ptid_t (*deprecated_target_wait_hook) (ptid_t ptid, 266 struct target_waitstatus *status, 267 int options); 268 269 /* Used by UI as a wrapper around command execution. May do various 270 things like enabling/disabling buttons, etc... */ 271 272 void (*deprecated_call_command_hook) (struct cmd_list_element * c, 273 char *cmd, int from_tty); 274 275 /* Called after a `set' command has finished. Is only run if the 276 `set' command succeeded. */ 277 278 void (*deprecated_set_hook) (struct cmd_list_element * c); 279 280 /* Called when the current thread changes. Argument is thread id. */ 281 282 void (*deprecated_context_hook) (int id); 283 284 /* Handler for SIGHUP. */ 285 286 #ifdef SIGHUP 287 /* NOTE 1999-04-29: This function will be static again, once we modify 288 gdb to use the event loop as the default command loop and we merge 289 event-top.c into this file, top.c. */ 290 /* static */ void 291 quit_cover (void) 292 { 293 /* Stop asking user for confirmation --- we're exiting. This 294 prevents asking the user dumb questions. */ 295 confirm = 0; 296 quit_command ((char *) 0, 0); 297 } 298 #endif /* defined SIGHUP */ 299 300 /* Line number we are currently in, in a file which is being sourced. */ 301 /* NOTE 1999-04-29: This variable will be static again, once we modify 302 gdb to use the event loop as the default command loop and we merge 303 event-top.c into this file, top.c. */ 304 /* static */ int source_line_number; 305 306 /* Name of the file we are sourcing. */ 307 /* NOTE 1999-04-29: This variable will be static again, once we modify 308 gdb to use the event loop as the default command loop and we merge 309 event-top.c into this file, top.c. */ 310 /* static */ const char *source_file_name; 311 312 /* Clean up on error during a "source" command (or execution of a 313 user-defined command). */ 314 315 void 316 do_restore_instream_cleanup (void *stream) 317 { 318 /* Restore the previous input stream. */ 319 instream = stream; 320 } 321 322 /* Read commands from STREAM. */ 323 void 324 read_command_file (FILE *stream) 325 { 326 struct cleanup *cleanups; 327 328 cleanups = make_cleanup (do_restore_instream_cleanup, instream); 329 instream = stream; 330 command_loop (); 331 do_cleanups (cleanups); 332 } 333 334 void (*pre_init_ui_hook) (void); 335 336 #ifdef __MSDOS__ 337 static void 338 do_chdir_cleanup (void *old_dir) 339 { 340 chdir (old_dir); 341 xfree (old_dir); 342 } 343 #endif 344 345 struct cleanup * 346 prepare_execute_command (void) 347 { 348 struct value *mark; 349 struct cleanup *cleanup; 350 351 mark = value_mark (); 352 cleanup = make_cleanup_value_free_to_mark (mark); 353 354 /* With multiple threads running while the one we're examining is 355 stopped, the dcache can get stale without us being able to detect 356 it. For the duration of the command, though, use the dcache to 357 help things like backtrace. */ 358 if (non_stop) 359 target_dcache_invalidate (); 360 361 return cleanup; 362 } 363 364 /* Tell the user if the language has changed (except first time) after 365 executing a command. */ 366 367 void 368 check_frame_language_change (void) 369 { 370 static int warned = 0; 371 372 /* First make sure that a new frame has been selected, in case the 373 command or the hooks changed the program state. */ 374 deprecated_safe_get_selected_frame (); 375 if (current_language != expected_language) 376 { 377 if (language_mode == language_mode_auto && info_verbose) 378 { 379 language_info (1); /* Print what changed. */ 380 } 381 warned = 0; 382 } 383 384 /* Warn the user if the working language does not match the language 385 of the current frame. Only warn the user if we are actually 386 running the program, i.e. there is a stack. */ 387 /* FIXME: This should be cacheing the frame and only running when 388 the frame changes. */ 389 390 if (has_stack_frames ()) 391 { 392 enum language flang; 393 394 flang = get_frame_language (); 395 if (!warned 396 && flang != language_unknown 397 && flang != current_language->la_language) 398 { 399 printf_filtered ("%s\n", lang_frame_mismatch_warn); 400 warned = 1; 401 } 402 } 403 } 404 405 /* Execute the line P as a command, in the current user context. 406 Pass FROM_TTY as second argument to the defining function. */ 407 408 void 409 execute_command (char *p, int from_tty) 410 { 411 struct cleanup *cleanup_if_error, *cleanup; 412 struct cmd_list_element *c; 413 char *line; 414 415 cleanup_if_error = make_bpstat_clear_actions_cleanup (); 416 cleanup = prepare_execute_command (); 417 418 /* Force cleanup of any alloca areas if using C alloca instead of 419 a builtin alloca. */ 420 alloca (0); 421 422 /* This can happen when command_line_input hits end of file. */ 423 if (p == NULL) 424 { 425 do_cleanups (cleanup); 426 return; 427 } 428 429 target_log_command (p); 430 431 while (*p == ' ' || *p == '\t') 432 p++; 433 if (*p) 434 { 435 char *arg; 436 line = p; 437 438 /* If trace-commands is set then this will print this command. */ 439 print_command_trace (p); 440 441 c = lookup_cmd (&p, cmdlist, "", 0, 1); 442 443 /* Pass null arg rather than an empty one. */ 444 arg = *p ? p : 0; 445 446 /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy 447 while the is_complete_command(cfunc) test is just plain 448 bogus. They should both be replaced by a test of the form 449 c->strip_trailing_white_space_p. */ 450 /* NOTE: cagney/2002-02-02: The function.cfunc in the below 451 can't be replaced with func. This is because it is the 452 cfunc, and not the func, that has the value that the 453 is_complete_command hack is testing for. */ 454 /* Clear off trailing whitespace, except for set and complete 455 command. */ 456 if (arg 457 && c->type != set_cmd 458 && !is_complete_command (c)) 459 { 460 p = arg + strlen (arg) - 1; 461 while (p >= arg && (*p == ' ' || *p == '\t')) 462 p--; 463 *(p + 1) = '\0'; 464 } 465 466 /* If this command has been pre-hooked, run the hook first. */ 467 execute_cmd_pre_hook (c); 468 469 if (c->flags & DEPRECATED_WARN_USER) 470 deprecated_cmd_warning (&line); 471 472 /* c->user_commands would be NULL in the case of a python command. */ 473 if (c->class == class_user && c->user_commands) 474 execute_user_command (c, arg); 475 else if (c->type == set_cmd) 476 do_set_command (arg, from_tty, c); 477 else if (c->type == show_cmd) 478 do_show_command (arg, from_tty, c); 479 else if (!cmd_func_p (c)) 480 error (_("That is not a command, just a help topic.")); 481 else if (deprecated_call_command_hook) 482 deprecated_call_command_hook (c, arg, from_tty); 483 else 484 cmd_func (c, arg, from_tty); 485 486 /* If the interpreter is in sync mode (we're running a user 487 command's list, running command hooks or similars), and we 488 just ran a synchronous command that started the target, wait 489 for that command to end. */ 490 if (!interpreter_async && sync_execution) 491 { 492 while (gdb_do_one_event () >= 0) 493 if (!sync_execution) 494 break; 495 } 496 497 /* If this command has been post-hooked, run the hook last. */ 498 execute_cmd_post_hook (c); 499 500 } 501 502 check_frame_language_change (); 503 504 do_cleanups (cleanup); 505 discard_cleanups (cleanup_if_error); 506 } 507 508 /* Run execute_command for P and FROM_TTY. Capture its output into the 509 returned string, do not display it to the screen. BATCH_FLAG will be 510 temporarily set to true. */ 511 512 char * 513 execute_command_to_string (char *p, int from_tty) 514 { 515 struct ui_file *str_file; 516 struct cleanup *cleanup; 517 char *retval; 518 519 /* GDB_STDOUT should be better already restored during these 520 restoration callbacks. */ 521 cleanup = set_batch_flag_and_make_cleanup_restore_page_info (); 522 523 make_cleanup_restore_integer (&interpreter_async); 524 interpreter_async = 0; 525 526 str_file = mem_fileopen (); 527 528 make_cleanup_ui_file_delete (str_file); 529 make_cleanup_restore_ui_file (&gdb_stdout); 530 make_cleanup_restore_ui_file (&gdb_stderr); 531 make_cleanup_restore_ui_file (&gdb_stdlog); 532 make_cleanup_restore_ui_file (&gdb_stdtarg); 533 make_cleanup_restore_ui_file (&gdb_stdtargerr); 534 535 if (ui_out_redirect (current_uiout, str_file) < 0) 536 warning (_("Current output protocol does not support redirection")); 537 else 538 make_cleanup_ui_out_redirect_pop (current_uiout); 539 540 gdb_stdout = str_file; 541 gdb_stderr = str_file; 542 gdb_stdlog = str_file; 543 gdb_stdtarg = str_file; 544 gdb_stdtargerr = str_file; 545 546 execute_command (p, from_tty); 547 548 retval = ui_file_xstrdup (str_file, NULL); 549 550 do_cleanups (cleanup); 551 552 return retval; 553 } 554 555 /* Read commands from `instream' and execute them 556 until end of file or error reading instream. */ 557 558 void 559 command_loop (void) 560 { 561 struct cleanup *old_chain; 562 char *command; 563 int stdin_is_tty = ISATTY (stdin); 564 565 while (instream && !feof (instream)) 566 { 567 if (window_hook && instream == stdin) 568 (*window_hook) (instream, get_prompt ()); 569 570 clear_quit_flag (); 571 if (instream == stdin && stdin_is_tty) 572 reinitialize_more_filter (); 573 old_chain = make_cleanup (null_cleanup, 0); 574 575 /* Get a command-line. This calls the readline package. */ 576 command = command_line_input (instream == stdin ? 577 get_prompt () : (char *) NULL, 578 instream == stdin, "prompt"); 579 if (command == 0) 580 { 581 do_cleanups (old_chain); 582 return; 583 } 584 585 make_command_stats_cleanup (1); 586 587 execute_command (command, instream == stdin); 588 589 /* Do any commands attached to breakpoint we are stopped at. */ 590 bpstat_do_actions (); 591 592 do_cleanups (old_chain); 593 } 594 } 595 596 /* When nonzero, cause dont_repeat to do nothing. This should only be 597 set via prevent_dont_repeat. */ 598 599 static int suppress_dont_repeat = 0; 600 601 /* Commands call this if they do not want to be repeated by null lines. */ 602 603 void 604 dont_repeat (void) 605 { 606 if (suppress_dont_repeat || server_command) 607 return; 608 609 /* If we aren't reading from standard input, we are saving the last 610 thing read from stdin in line and don't want to delete it. Null 611 lines won't repeat here in any case. */ 612 if (instream == stdin) 613 *saved_command_line = 0; 614 } 615 616 /* Prevent dont_repeat from working, and return a cleanup that 617 restores the previous state. */ 618 619 struct cleanup * 620 prevent_dont_repeat (void) 621 { 622 struct cleanup *result = make_cleanup_restore_integer (&suppress_dont_repeat); 623 624 suppress_dont_repeat = 1; 625 return result; 626 } 627 628 629 /* Read a line from the stream "instream" without command line editing. 630 631 It prints PROMPT_ARG once at the start. 632 Action is compatible with "readline", e.g. space for the result is 633 malloc'd and should be freed by the caller. 634 635 A NULL return means end of file. */ 636 char * 637 gdb_readline (char *prompt_arg) 638 { 639 int c; 640 char *result; 641 int input_index = 0; 642 int result_size = 80; 643 644 if (prompt_arg) 645 { 646 /* Don't use a _filtered function here. It causes the assumed 647 character position to be off, since the newline we read from 648 the user is not accounted for. */ 649 fputs_unfiltered (prompt_arg, gdb_stdout); 650 gdb_flush (gdb_stdout); 651 } 652 653 result = (char *) xmalloc (result_size); 654 655 while (1) 656 { 657 /* Read from stdin if we are executing a user defined command. 658 This is the right thing for prompt_for_continue, at least. */ 659 c = fgetc (instream ? instream : stdin); 660 661 if (c == EOF) 662 { 663 if (input_index > 0) 664 /* The last line does not end with a newline. Return it, and 665 if we are called again fgetc will still return EOF and 666 we'll return NULL then. */ 667 break; 668 xfree (result); 669 return NULL; 670 } 671 672 if (c == '\n') 673 { 674 if (input_index > 0 && result[input_index - 1] == '\r') 675 input_index--; 676 break; 677 } 678 679 result[input_index++] = c; 680 while (input_index >= result_size) 681 { 682 result_size *= 2; 683 result = (char *) xrealloc (result, result_size); 684 } 685 } 686 687 result[input_index++] = '\0'; 688 return result; 689 } 690 691 /* Variables which control command line editing and history 692 substitution. These variables are given default values at the end 693 of this file. */ 694 static int command_editing_p; 695 696 /* NOTE 1999-04-29: This variable will be static again, once we modify 697 gdb to use the event loop as the default command loop and we merge 698 event-top.c into this file, top.c. */ 699 700 /* static */ int history_expansion_p; 701 702 static int write_history_p; 703 static void 704 show_write_history_p (struct ui_file *file, int from_tty, 705 struct cmd_list_element *c, const char *value) 706 { 707 fprintf_filtered (file, _("Saving of the history record on exit is %s.\n"), 708 value); 709 } 710 711 /* The variable associated with the "set/show history size" 712 command. */ 713 static unsigned int history_size_setshow_var; 714 715 static void 716 show_history_size (struct ui_file *file, int from_tty, 717 struct cmd_list_element *c, const char *value) 718 { 719 fprintf_filtered (file, _("The size of the command history is %s.\n"), 720 value); 721 } 722 723 static char *history_filename; 724 static void 725 show_history_filename (struct ui_file *file, int from_tty, 726 struct cmd_list_element *c, const char *value) 727 { 728 fprintf_filtered (file, _("The filename in which to record " 729 "the command history is \"%s\".\n"), 730 value); 731 } 732 733 /* This is like readline(), but it has some gdb-specific behavior. 734 gdb may want readline in both the synchronous and async modes during 735 a single gdb invocation. At the ordinary top-level prompt we might 736 be using the async readline. That means we can't use 737 rl_pre_input_hook, since it doesn't work properly in async mode. 738 However, for a secondary prompt (" >", such as occurs during a 739 `define'), gdb wants a synchronous response. 740 741 We used to call readline() directly, running it in synchronous 742 mode. But mixing modes this way is not supported, and as of 743 readline 5.x it no longer works; the arrow keys come unbound during 744 the synchronous call. So we make a nested call into the event 745 loop. That's what gdb_readline_wrapper is for. */ 746 747 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't 748 rely on gdb_readline_wrapper_result, which might still be NULL if 749 the user types Control-D for EOF. */ 750 static int gdb_readline_wrapper_done; 751 752 /* The result of the current call to gdb_readline_wrapper, once a newline 753 is seen. */ 754 static char *gdb_readline_wrapper_result; 755 756 /* Any intercepted hook. Operate-and-get-next sets this, expecting it 757 to be called after the newline is processed (which will redisplay 758 the prompt). But in gdb_readline_wrapper we will not get a new 759 prompt until the next call, or until we return to the event loop. 760 So we disable this hook around the newline and restore it before we 761 return. */ 762 static void (*saved_after_char_processing_hook) (void); 763 764 /* This function is called when readline has seen a complete line of 765 text. */ 766 767 static void 768 gdb_readline_wrapper_line (char *line) 769 { 770 gdb_assert (!gdb_readline_wrapper_done); 771 gdb_readline_wrapper_result = line; 772 gdb_readline_wrapper_done = 1; 773 774 /* Prevent operate-and-get-next from acting too early. */ 775 saved_after_char_processing_hook = after_char_processing_hook; 776 after_char_processing_hook = NULL; 777 778 /* Prevent parts of the prompt from being redisplayed if annotations 779 are enabled, and readline's state getting out of sync. */ 780 if (async_command_editing_p) 781 rl_callback_handler_remove (); 782 } 783 784 struct gdb_readline_wrapper_cleanup 785 { 786 void (*handler_orig) (char *); 787 int already_prompted_orig; 788 }; 789 790 static void 791 gdb_readline_wrapper_cleanup (void *arg) 792 { 793 struct gdb_readline_wrapper_cleanup *cleanup = arg; 794 795 rl_already_prompted = cleanup->already_prompted_orig; 796 797 gdb_assert (input_handler == gdb_readline_wrapper_line); 798 input_handler = cleanup->handler_orig; 799 gdb_readline_wrapper_result = NULL; 800 gdb_readline_wrapper_done = 0; 801 802 after_char_processing_hook = saved_after_char_processing_hook; 803 saved_after_char_processing_hook = NULL; 804 805 xfree (cleanup); 806 } 807 808 char * 809 gdb_readline_wrapper (char *prompt) 810 { 811 struct cleanup *back_to; 812 struct gdb_readline_wrapper_cleanup *cleanup; 813 char *retval; 814 815 cleanup = xmalloc (sizeof (*cleanup)); 816 cleanup->handler_orig = input_handler; 817 input_handler = gdb_readline_wrapper_line; 818 819 cleanup->already_prompted_orig = rl_already_prompted; 820 821 back_to = make_cleanup (gdb_readline_wrapper_cleanup, cleanup); 822 823 /* Display our prompt and prevent double prompt display. */ 824 display_gdb_prompt (prompt); 825 rl_already_prompted = 1; 826 827 if (after_char_processing_hook) 828 (*after_char_processing_hook) (); 829 gdb_assert (after_char_processing_hook == NULL); 830 831 while (gdb_do_one_event () >= 0) 832 if (gdb_readline_wrapper_done) 833 break; 834 835 retval = gdb_readline_wrapper_result; 836 do_cleanups (back_to); 837 return retval; 838 } 839 840 841 /* The current saved history number from operate-and-get-next. 842 This is -1 if not valid. */ 843 static int operate_saved_history = -1; 844 845 /* This is put on the appropriate hook and helps operate-and-get-next 846 do its work. */ 847 static void 848 gdb_rl_operate_and_get_next_completion (void) 849 { 850 int delta = where_history () - operate_saved_history; 851 852 /* The `key' argument to rl_get_previous_history is ignored. */ 853 rl_get_previous_history (delta, 0); 854 operate_saved_history = -1; 855 856 /* readline doesn't automatically update the display for us. */ 857 rl_redisplay (); 858 859 after_char_processing_hook = NULL; 860 rl_pre_input_hook = NULL; 861 } 862 863 /* This is a gdb-local readline command handler. It accepts the 864 current command line (like RET does) and, if this command was taken 865 from the history, arranges for the next command in the history to 866 appear on the command line when the prompt returns. 867 We ignore the arguments. */ 868 static int 869 gdb_rl_operate_and_get_next (int count, int key) 870 { 871 int where; 872 873 /* Use the async hook. */ 874 after_char_processing_hook = gdb_rl_operate_and_get_next_completion; 875 876 /* Find the current line, and find the next line to use. */ 877 where = where_history(); 878 879 /* FIXME: kettenis/20020817: max_input_history is renamed into 880 history_max_entries in readline-4.2. When we do a new readline 881 import, we should probably change it here too, even though 882 readline maintains backwards compatibility for now by still 883 defining max_input_history. */ 884 if ((history_is_stifled () && (history_length >= max_input_history)) || 885 (where >= history_length - 1)) 886 operate_saved_history = where; 887 else 888 operate_saved_history = where + 1; 889 890 return rl_newline (1, key); 891 } 892 893 /* Read one line from the command input stream `instream' 894 into the local static buffer `linebuffer' (whose current length 895 is `linelength'). 896 The buffer is made bigger as necessary. 897 Returns the address of the start of the line. 898 899 NULL is returned for end of file. 900 901 *If* the instream == stdin & stdin is a terminal, the line read 902 is copied into the file line saver (global var char *line, 903 length linesize) so that it can be duplicated. 904 905 This routine either uses fancy command line editing or 906 simple input as the user has requested. */ 907 908 char * 909 command_line_input (char *prompt_arg, int repeat, char *annotation_suffix) 910 { 911 static char *linebuffer = 0; 912 static unsigned linelength = 0; 913 char *p; 914 char *p1; 915 char *rl; 916 char *local_prompt = prompt_arg; 917 char *nline; 918 char got_eof = 0; 919 920 /* The annotation suffix must be non-NULL. */ 921 if (annotation_suffix == NULL) 922 annotation_suffix = ""; 923 924 if (annotation_level > 1 && instream == stdin) 925 { 926 local_prompt = alloca ((prompt_arg == NULL ? 0 : strlen (prompt_arg)) 927 + strlen (annotation_suffix) + 40); 928 if (prompt_arg == NULL) 929 local_prompt[0] = '\0'; 930 else 931 strcpy (local_prompt, prompt_arg); 932 strcat (local_prompt, "\n\032\032"); 933 strcat (local_prompt, annotation_suffix); 934 strcat (local_prompt, "\n"); 935 } 936 937 if (linebuffer == 0) 938 { 939 linelength = 80; 940 linebuffer = (char *) xmalloc (linelength); 941 } 942 943 p = linebuffer; 944 945 /* Control-C quits instantly if typed while in this loop 946 since it should not wait until the user types a newline. */ 947 immediate_quit++; 948 QUIT; 949 #ifdef STOP_SIGNAL 950 if (job_control) 951 signal (STOP_SIGNAL, handle_stop_sig); 952 #endif 953 954 while (1) 955 { 956 /* Make sure that all output has been output. Some machines may 957 let you get away with leaving out some of the gdb_flush, but 958 not all. */ 959 wrap_here (""); 960 gdb_flush (gdb_stdout); 961 gdb_flush (gdb_stderr); 962 963 if (source_file_name != NULL) 964 ++source_line_number; 965 966 if (annotation_level > 1 && instream == stdin) 967 { 968 puts_unfiltered ("\n\032\032pre-"); 969 puts_unfiltered (annotation_suffix); 970 puts_unfiltered ("\n"); 971 } 972 973 /* Don't use fancy stuff if not talking to stdin. */ 974 if (deprecated_readline_hook && input_from_terminal_p ()) 975 { 976 rl = (*deprecated_readline_hook) (local_prompt); 977 } 978 else if (command_editing_p && input_from_terminal_p ()) 979 { 980 rl = gdb_readline_wrapper (local_prompt); 981 } 982 else 983 { 984 rl = gdb_readline (local_prompt); 985 } 986 987 if (annotation_level > 1 && instream == stdin) 988 { 989 puts_unfiltered ("\n\032\032post-"); 990 puts_unfiltered (annotation_suffix); 991 puts_unfiltered ("\n"); 992 } 993 994 if (!rl || rl == (char *) EOF) 995 { 996 got_eof = 1; 997 break; 998 } 999 if (strlen (rl) + 1 + (p - linebuffer) > linelength) 1000 { 1001 linelength = strlen (rl) + 1 + (p - linebuffer); 1002 nline = (char *) xrealloc (linebuffer, linelength); 1003 p += nline - linebuffer; 1004 linebuffer = nline; 1005 } 1006 p1 = rl; 1007 /* Copy line. Don't copy null at end. (Leaves line alone 1008 if this was just a newline). */ 1009 while (*p1) 1010 *p++ = *p1++; 1011 1012 xfree (rl); /* Allocated in readline. */ 1013 1014 if (p == linebuffer || *(p - 1) != '\\') 1015 break; 1016 1017 p--; /* Put on top of '\'. */ 1018 local_prompt = (char *) 0; 1019 } 1020 1021 #ifdef STOP_SIGNAL 1022 if (job_control) 1023 signal (STOP_SIGNAL, SIG_DFL); 1024 #endif 1025 immediate_quit--; 1026 1027 if (got_eof) 1028 return NULL; 1029 1030 #define SERVER_COMMAND_LENGTH 7 1031 server_command = 1032 (p - linebuffer > SERVER_COMMAND_LENGTH) 1033 && strncmp (linebuffer, "server ", SERVER_COMMAND_LENGTH) == 0; 1034 if (server_command) 1035 { 1036 /* Note that we don't set `line'. Between this and the check in 1037 dont_repeat, this insures that repeating will still do the 1038 right thing. */ 1039 *p = '\0'; 1040 return linebuffer + SERVER_COMMAND_LENGTH; 1041 } 1042 1043 /* Do history expansion if that is wished. */ 1044 if (history_expansion_p && instream == stdin 1045 && ISATTY (instream)) 1046 { 1047 char *history_value; 1048 int expanded; 1049 1050 *p = '\0'; /* Insert null now. */ 1051 expanded = history_expand (linebuffer, &history_value); 1052 if (expanded) 1053 { 1054 /* Print the changes. */ 1055 printf_unfiltered ("%s\n", history_value); 1056 1057 /* If there was an error, call this function again. */ 1058 if (expanded < 0) 1059 { 1060 xfree (history_value); 1061 return command_line_input (prompt_arg, repeat, 1062 annotation_suffix); 1063 } 1064 if (strlen (history_value) > linelength) 1065 { 1066 linelength = strlen (history_value) + 1; 1067 linebuffer = (char *) xrealloc (linebuffer, linelength); 1068 } 1069 strcpy (linebuffer, history_value); 1070 p = linebuffer + strlen (linebuffer); 1071 } 1072 xfree (history_value); 1073 } 1074 1075 /* If we just got an empty line, and that is supposed to repeat the 1076 previous command, return the value in the global buffer. */ 1077 if (repeat && p == linebuffer) 1078 return saved_command_line; 1079 for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++); 1080 if (repeat && !*p1) 1081 return saved_command_line; 1082 1083 *p = 0; 1084 1085 /* Add line to history if appropriate. */ 1086 if (instream == stdin 1087 && ISATTY (stdin) && *linebuffer) 1088 add_history (linebuffer); 1089 1090 /* Note: lines consisting solely of comments are added to the command 1091 history. This is useful when you type a command, and then 1092 realize you don't want to execute it quite yet. You can comment 1093 out the command and then later fetch it from the value history 1094 and remove the '#'. The kill ring is probably better, but some 1095 people are in the habit of commenting things out. */ 1096 if (*p1 == '#') 1097 *p1 = '\0'; /* Found a comment. */ 1098 1099 /* Save into global buffer if appropriate. */ 1100 if (repeat) 1101 { 1102 if (linelength > saved_command_line_size) 1103 { 1104 saved_command_line = xrealloc (saved_command_line, linelength); 1105 saved_command_line_size = linelength; 1106 } 1107 strcpy (saved_command_line, linebuffer); 1108 return saved_command_line; 1109 } 1110 1111 return linebuffer; 1112 } 1113 1114 /* Print the GDB banner. */ 1115 void 1116 print_gdb_version (struct ui_file *stream) 1117 { 1118 /* From GNU coding standards, first line is meant to be easy for a 1119 program to parse, and is just canonical program name and version 1120 number, which starts after last space. */ 1121 1122 fprintf_filtered (stream, "GNU gdb %s%s\n", PKGVERSION, version); 1123 1124 /* Second line is a copyright notice. */ 1125 1126 fprintf_filtered (stream, 1127 "Copyright (C) 2013 Free Software Foundation, Inc.\n"); 1128 1129 /* Following the copyright is a brief statement that the program is 1130 free software, that users are free to copy and change it on 1131 certain conditions, that it is covered by the GNU GPL, and that 1132 there is no warranty. */ 1133 1134 fprintf_filtered (stream, "\ 1135 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\ 1136 \nThis is free software: you are free to change and redistribute it.\n\ 1137 There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\ 1138 and \"show warranty\" for details.\n"); 1139 1140 /* After the required info we print the configuration information. */ 1141 1142 fprintf_filtered (stream, "This GDB was configured as \""); 1143 if (strcmp (host_name, target_name) != 0) 1144 { 1145 fprintf_filtered (stream, "--host=%s --target=%s", 1146 host_name, target_name); 1147 } 1148 else 1149 { 1150 fprintf_filtered (stream, "%s", host_name); 1151 } 1152 fprintf_filtered (stream, "\"."); 1153 1154 if (REPORT_BUGS_TO[0]) 1155 { 1156 fprintf_filtered (stream, 1157 _("\nFor bug reporting instructions, please see:\n")); 1158 fprintf_filtered (stream, "%s.", REPORT_BUGS_TO); 1159 } 1160 } 1161 1162 1163 /* The current top level prompt, settable with "set prompt", and/or 1164 with the python `gdb.prompt_hook' hook. */ 1165 static char *top_prompt; 1166 1167 /* Access method for the GDB prompt string. */ 1168 1169 char * 1170 get_prompt (void) 1171 { 1172 return top_prompt; 1173 } 1174 1175 /* Set method for the GDB prompt string. */ 1176 1177 void 1178 set_prompt (const char *s) 1179 { 1180 char *p = xstrdup (s); 1181 1182 xfree (top_prompt); 1183 top_prompt = p; 1184 } 1185 1186 1187 struct qt_args 1188 { 1189 char *args; 1190 int from_tty; 1191 }; 1192 1193 /* Callback for iterate_over_inferiors. Kills or detaches the given 1194 inferior, depending on how we originally gained control of it. */ 1195 1196 static int 1197 kill_or_detach (struct inferior *inf, void *args) 1198 { 1199 struct qt_args *qt = args; 1200 struct thread_info *thread; 1201 1202 if (inf->pid == 0) 1203 return 0; 1204 1205 thread = any_thread_of_process (inf->pid); 1206 if (thread != NULL) 1207 { 1208 switch_to_thread (thread->ptid); 1209 1210 /* Leave core files alone. */ 1211 if (target_has_execution) 1212 { 1213 if (inf->attach_flag) 1214 target_detach (qt->args, qt->from_tty); 1215 else 1216 target_kill (); 1217 } 1218 } 1219 1220 return 0; 1221 } 1222 1223 /* Callback for iterate_over_inferiors. Prints info about what GDB 1224 will do to each inferior on a "quit". ARG points to a struct 1225 ui_out where output is to be collected. */ 1226 1227 static int 1228 print_inferior_quit_action (struct inferior *inf, void *arg) 1229 { 1230 struct ui_file *stb = arg; 1231 1232 if (inf->pid == 0) 1233 return 0; 1234 1235 if (inf->attach_flag) 1236 fprintf_filtered (stb, 1237 _("\tInferior %d [%s] will be detached.\n"), inf->num, 1238 target_pid_to_str (pid_to_ptid (inf->pid))); 1239 else 1240 fprintf_filtered (stb, 1241 _("\tInferior %d [%s] will be killed.\n"), inf->num, 1242 target_pid_to_str (pid_to_ptid (inf->pid))); 1243 1244 return 0; 1245 } 1246 1247 /* If necessary, make the user confirm that we should quit. Return 1248 non-zero if we should quit, zero if we shouldn't. */ 1249 1250 int 1251 quit_confirm (void) 1252 { 1253 struct ui_file *stb; 1254 struct cleanup *old_chain; 1255 char *str; 1256 int qr; 1257 1258 /* Don't even ask if we're only debugging a core file inferior. */ 1259 if (!have_live_inferiors ()) 1260 return 1; 1261 1262 /* Build the query string as a single string. */ 1263 stb = mem_fileopen (); 1264 old_chain = make_cleanup_ui_file_delete (stb); 1265 1266 /* This is something of a hack. But there's no reliable way to see 1267 if a GUI is running. The `use_windows' variable doesn't cut 1268 it. */ 1269 if (deprecated_init_ui_hook) 1270 fprintf_filtered (stb, _("A debugging session is active.\n" 1271 "Do you still want to close the debugger?")); 1272 else 1273 { 1274 fprintf_filtered (stb, _("A debugging session is active.\n\n")); 1275 iterate_over_inferiors (print_inferior_quit_action, stb); 1276 fprintf_filtered (stb, _("\nQuit anyway? ")); 1277 } 1278 1279 str = ui_file_xstrdup (stb, NULL); 1280 make_cleanup (xfree, str); 1281 1282 qr = query ("%s", str); 1283 do_cleanups (old_chain); 1284 return qr; 1285 } 1286 1287 /* Helper routine for quit_force that requires error handling. */ 1288 1289 static int 1290 quit_target (void *arg) 1291 { 1292 struct qt_args *qt = (struct qt_args *)arg; 1293 1294 /* Kill or detach all inferiors. */ 1295 iterate_over_inferiors (kill_or_detach, qt); 1296 1297 /* Give all pushed targets a chance to do minimal cleanup, and pop 1298 them all out. */ 1299 pop_all_targets (1); 1300 1301 /* Save the history information if it is appropriate to do so. */ 1302 if (write_history_p && history_filename) 1303 write_history (history_filename); 1304 1305 do_final_cleanups (all_cleanups ()); /* Do any final cleanups before 1306 exiting. */ 1307 return 0; 1308 } 1309 1310 /* Quit without asking for confirmation. */ 1311 1312 void 1313 quit_force (char *args, int from_tty) 1314 { 1315 int exit_code = 0; 1316 struct qt_args qt; 1317 1318 /* An optional expression may be used to cause gdb to terminate with the 1319 value of that expression. */ 1320 if (args) 1321 { 1322 struct value *val = parse_and_eval (args); 1323 1324 exit_code = (int) value_as_long (val); 1325 } 1326 else if (return_child_result) 1327 exit_code = return_child_result_value; 1328 1329 qt.args = args; 1330 qt.from_tty = from_tty; 1331 1332 /* We want to handle any quit errors and exit regardless. */ 1333 catch_errors (quit_target, &qt, 1334 "Quitting: ", RETURN_MASK_ALL); 1335 1336 exit (exit_code); 1337 } 1338 1339 /* Returns whether GDB is running on a terminal and input is 1340 currently coming from that terminal. */ 1341 1342 int 1343 input_from_terminal_p (void) 1344 { 1345 if (batch_flag) 1346 return 0; 1347 1348 if (gdb_has_a_terminal () && instream == stdin) 1349 return 1; 1350 1351 /* If INSTREAM is unset, and we are not in a user command, we 1352 must be in Insight. That's like having a terminal, for our 1353 purposes. */ 1354 if (instream == NULL && !in_user_command) 1355 return 1; 1356 1357 return 0; 1358 } 1359 1360 static void 1361 dont_repeat_command (char *ignored, int from_tty) 1362 { 1363 /* Can't call dont_repeat here because we're not necessarily reading 1364 from stdin. */ 1365 *saved_command_line = 0; 1366 } 1367 1368 /* Functions to manipulate command line editing control variables. */ 1369 1370 /* Number of commands to print in each call to show_commands. */ 1371 #define Hist_print 10 1372 void 1373 show_commands (char *args, int from_tty) 1374 { 1375 /* Index for history commands. Relative to history_base. */ 1376 int offset; 1377 1378 /* Number of the history entry which we are planning to display next. 1379 Relative to history_base. */ 1380 static int num = 0; 1381 1382 /* Print out some of the commands from the command history. */ 1383 1384 if (args) 1385 { 1386 if (args[0] == '+' && args[1] == '\0') 1387 /* "info editing +" should print from the stored position. */ 1388 ; 1389 else 1390 /* "info editing <exp>" should print around command number <exp>. */ 1391 num = (parse_and_eval_long (args) - history_base) - Hist_print / 2; 1392 } 1393 /* "show commands" means print the last Hist_print commands. */ 1394 else 1395 { 1396 num = history_length - Hist_print; 1397 } 1398 1399 if (num < 0) 1400 num = 0; 1401 1402 /* If there are at least Hist_print commands, we want to display the last 1403 Hist_print rather than, say, the last 6. */ 1404 if (history_length - num < Hist_print) 1405 { 1406 num = history_length - Hist_print; 1407 if (num < 0) 1408 num = 0; 1409 } 1410 1411 for (offset = num; 1412 offset < num + Hist_print && offset < history_length; 1413 offset++) 1414 { 1415 printf_filtered ("%5d %s\n", history_base + offset, 1416 (history_get (history_base + offset))->line); 1417 } 1418 1419 /* The next command we want to display is the next one that we haven't 1420 displayed yet. */ 1421 num += Hist_print; 1422 1423 /* If the user repeats this command with return, it should do what 1424 "show commands +" does. This is unnecessary if arg is null, 1425 because "show commands +" is not useful after "show commands". */ 1426 if (from_tty && args) 1427 { 1428 args[0] = '+'; 1429 args[1] = '\0'; 1430 } 1431 } 1432 1433 /* Called by do_setshow_command. */ 1434 static void 1435 set_history_size_command (char *args, int from_tty, struct cmd_list_element *c) 1436 { 1437 /* Readline's history interface works with 'int', so it can only 1438 handle history sizes up to INT_MAX. The command itself is 1439 uinteger, so UINT_MAX means "unlimited", but we only get that if 1440 the user does "set history size 0" -- "set history size <UINT_MAX>" 1441 throws out-of-range. */ 1442 if (history_size_setshow_var > INT_MAX 1443 && history_size_setshow_var != UINT_MAX) 1444 { 1445 unsigned int new_value = history_size_setshow_var; 1446 1447 /* Restore previous value before throwing. */ 1448 if (history_is_stifled ()) 1449 history_size_setshow_var = history_max_entries; 1450 else 1451 history_size_setshow_var = UINT_MAX; 1452 1453 error (_("integer %u out of range"), new_value); 1454 } 1455 1456 /* Commit the new value to readline's history. */ 1457 if (history_size_setshow_var == UINT_MAX) 1458 unstifle_history (); 1459 else 1460 stifle_history (history_size_setshow_var); 1461 } 1462 1463 void 1464 set_history (char *args, int from_tty) 1465 { 1466 printf_unfiltered (_("\"set history\" must be followed " 1467 "by the name of a history subcommand.\n")); 1468 help_list (sethistlist, "set history ", -1, gdb_stdout); 1469 } 1470 1471 void 1472 show_history (char *args, int from_tty) 1473 { 1474 cmd_show_list (showhistlist, from_tty, ""); 1475 } 1476 1477 int info_verbose = 0; /* Default verbose msgs off. */ 1478 1479 /* Called by do_setshow_command. An elaborate joke. */ 1480 void 1481 set_verbose (char *args, int from_tty, struct cmd_list_element *c) 1482 { 1483 char *cmdname = "verbose"; 1484 struct cmd_list_element *showcmd; 1485 1486 showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1); 1487 gdb_assert (showcmd != NULL && showcmd != CMD_LIST_AMBIGUOUS); 1488 1489 if (info_verbose) 1490 { 1491 c->doc = "Set verbose printing of informational messages."; 1492 showcmd->doc = "Show verbose printing of informational messages."; 1493 } 1494 else 1495 { 1496 c->doc = "Set verbosity."; 1497 showcmd->doc = "Show verbosity."; 1498 } 1499 } 1500 1501 /* Init the history buffer. Note that we are called after the init file(s) 1502 have been read so that the user can change the history file via his 1503 .gdbinit file (for instance). The GDBHISTFILE environment variable 1504 overrides all of this. */ 1505 1506 void 1507 init_history (void) 1508 { 1509 char *tmpenv; 1510 1511 tmpenv = getenv ("HISTSIZE"); 1512 if (tmpenv) 1513 { 1514 int var; 1515 1516 var = atoi (tmpenv); 1517 if (var < 0) 1518 { 1519 /* Prefer ending up with no history rather than overflowing 1520 readline's history interface, which uses signed 'int' 1521 everywhere. */ 1522 var = 0; 1523 } 1524 1525 history_size_setshow_var = var; 1526 } 1527 /* If the init file hasn't set a size yet, pick the default. */ 1528 else if (history_size_setshow_var == 0) 1529 history_size_setshow_var = 256; 1530 1531 /* Note that unlike "set history size 0", "HISTSIZE=0" really sets 1532 the history size to 0... */ 1533 stifle_history (history_size_setshow_var); 1534 1535 tmpenv = getenv ("GDBHISTFILE"); 1536 if (tmpenv) 1537 history_filename = xstrdup (tmpenv); 1538 else if (!history_filename) 1539 { 1540 /* We include the current directory so that if the user changes 1541 directories the file written will be the same as the one 1542 that was read. */ 1543 #ifdef __MSDOS__ 1544 /* No leading dots in file names are allowed on MSDOS. */ 1545 history_filename = concat (current_directory, "/_gdb_history", 1546 (char *)NULL); 1547 #else 1548 history_filename = concat (current_directory, "/.gdb_history", 1549 (char *)NULL); 1550 #endif 1551 } 1552 read_history (history_filename); 1553 } 1554 1555 static void 1556 show_prompt (struct ui_file *file, int from_tty, 1557 struct cmd_list_element *c, const char *value) 1558 { 1559 fprintf_filtered (file, _("Gdb's prompt is \"%s\".\n"), value); 1560 } 1561 1562 static void 1563 show_async_command_editing_p (struct ui_file *file, int from_tty, 1564 struct cmd_list_element *c, const char *value) 1565 { 1566 fprintf_filtered (file, _("Editing of command lines as " 1567 "they are typed is %s.\n"), 1568 value); 1569 } 1570 1571 static void 1572 show_annotation_level (struct ui_file *file, int from_tty, 1573 struct cmd_list_element *c, const char *value) 1574 { 1575 fprintf_filtered (file, _("Annotation_level is %s.\n"), value); 1576 } 1577 1578 static void 1579 show_exec_done_display_p (struct ui_file *file, int from_tty, 1580 struct cmd_list_element *c, const char *value) 1581 { 1582 fprintf_filtered (file, _("Notification of completion for " 1583 "asynchronous execution commands is %s.\n"), 1584 value); 1585 } 1586 1587 /* "set" command for the gdb_datadir configuration variable. */ 1588 1589 static void 1590 set_gdb_datadir (char *args, int from_tty, struct cmd_list_element *c) 1591 { 1592 observer_notify_gdb_datadir_changed (); 1593 } 1594 1595 static void 1596 init_main (void) 1597 { 1598 /* Initialize the prompt to a simple "(gdb) " prompt or to whatever 1599 the DEFAULT_PROMPT is. */ 1600 set_prompt (DEFAULT_PROMPT); 1601 1602 /* Set things up for annotation_level > 1, if the user ever decides 1603 to use it. */ 1604 async_annotation_suffix = "prompt"; 1605 1606 /* Set the important stuff up for command editing. */ 1607 command_editing_p = 1; 1608 history_expansion_p = 0; 1609 write_history_p = 0; 1610 1611 /* Setup important stuff for command line editing. */ 1612 rl_completion_word_break_hook = gdb_completion_word_break_characters; 1613 rl_completion_entry_function = readline_line_completion_function; 1614 rl_completer_word_break_characters = default_word_break_characters (); 1615 rl_completer_quote_characters = get_gdb_completer_quote_characters (); 1616 rl_readline_name = "gdb"; 1617 rl_terminal_name = getenv ("TERM"); 1618 1619 /* The name for this defun comes from Bash, where it originated. 1620 15 is Control-o, the same binding this function has in Bash. */ 1621 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15); 1622 1623 add_setshow_string_cmd ("prompt", class_support, 1624 &top_prompt, 1625 _("Set gdb's prompt"), 1626 _("Show gdb's prompt"), 1627 NULL, NULL, 1628 show_prompt, 1629 &setlist, &showlist); 1630 1631 add_com ("dont-repeat", class_support, dont_repeat_command, _("\ 1632 Don't repeat this command.\nPrimarily \ 1633 used inside of user-defined commands that should not be repeated when\n\ 1634 hitting return.")); 1635 1636 add_setshow_boolean_cmd ("editing", class_support, 1637 &async_command_editing_p, _("\ 1638 Set editing of command lines as they are typed."), _("\ 1639 Show editing of command lines as they are typed."), _("\ 1640 Use \"on\" to enable the editing, and \"off\" to disable it.\n\ 1641 Without an argument, command line editing is enabled. To edit, use\n\ 1642 EMACS-like or VI-like commands like control-P or ESC."), 1643 set_async_editing_command, 1644 show_async_command_editing_p, 1645 &setlist, &showlist); 1646 1647 add_setshow_boolean_cmd ("save", no_class, &write_history_p, _("\ 1648 Set saving of the history record on exit."), _("\ 1649 Show saving of the history record on exit."), _("\ 1650 Use \"on\" to enable the saving, and \"off\" to disable it.\n\ 1651 Without an argument, saving is enabled."), 1652 NULL, 1653 show_write_history_p, 1654 &sethistlist, &showhistlist); 1655 1656 add_setshow_uinteger_cmd ("size", no_class, &history_size_setshow_var, _("\ 1657 Set the size of the command history,"), _("\ 1658 Show the size of the command history,"), _("\ 1659 ie. the number of previous commands to keep a record of."), 1660 set_history_size_command, 1661 show_history_size, 1662 &sethistlist, &showhistlist); 1663 1664 add_setshow_filename_cmd ("filename", no_class, &history_filename, _("\ 1665 Set the filename in which to record the command history"), _("\ 1666 Show the filename in which to record the command history"), _("\ 1667 (the list of previous commands of which a record is kept)."), 1668 NULL, 1669 show_history_filename, 1670 &sethistlist, &showhistlist); 1671 1672 add_setshow_boolean_cmd ("confirm", class_support, &confirm, _("\ 1673 Set whether to confirm potentially dangerous operations."), _("\ 1674 Show whether to confirm potentially dangerous operations."), NULL, 1675 NULL, 1676 show_confirm, 1677 &setlist, &showlist); 1678 1679 add_setshow_zinteger_cmd ("annotate", class_obscure, &annotation_level, _("\ 1680 Set annotation_level."), _("\ 1681 Show annotation_level."), _("\ 1682 0 == normal; 1 == fullname (for use when running under emacs)\n\ 1683 2 == output annotated suitably for use by programs that control GDB."), 1684 NULL, 1685 show_annotation_level, 1686 &setlist, &showlist); 1687 1688 add_setshow_boolean_cmd ("exec-done-display", class_support, 1689 &exec_done_display_p, _("\ 1690 Set notification of completion for asynchronous execution commands."), _("\ 1691 Show notification of completion for asynchronous execution commands."), _("\ 1692 Use \"on\" to enable the notification, and \"off\" to disable it."), 1693 NULL, 1694 show_exec_done_display_p, 1695 &setlist, &showlist); 1696 1697 add_setshow_filename_cmd ("data-directory", class_maintenance, 1698 &gdb_datadir, _("Set GDB's data directory."), 1699 _("Show GDB's data directory."), 1700 _("\ 1701 When set, GDB uses the specified path to search for data files."), 1702 set_gdb_datadir, NULL, 1703 &setlist, 1704 &showlist); 1705 } 1706 1707 void 1708 gdb_init (char *argv0) 1709 { 1710 if (pre_init_ui_hook) 1711 pre_init_ui_hook (); 1712 1713 /* Run the init function of each source file. */ 1714 1715 #ifdef __MSDOS__ 1716 /* Make sure we return to the original directory upon exit, come 1717 what may, since the OS doesn't do that for us. */ 1718 make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory)); 1719 #endif 1720 1721 init_cmd_lists (); /* This needs to be done first. */ 1722 initialize_targets (); /* Setup target_terminal macros for utils.c. */ 1723 initialize_utils (); /* Make errors and warnings possible. */ 1724 1725 /* Here is where we call all the _initialize_foo routines. */ 1726 initialize_all_files (); 1727 1728 /* This creates the current_program_space. Do this after all the 1729 _initialize_foo routines have had a chance to install their 1730 per-sspace data keys. Also do this before 1731 initialize_current_architecture is called, because it accesses 1732 exec_bfd of the current program space. */ 1733 initialize_progspace (); 1734 initialize_inferiors (); 1735 initialize_current_architecture (); 1736 init_cli_cmds(); 1737 initialize_event_loop (); 1738 init_main (); /* But that omits this file! Do it now. */ 1739 1740 initialize_stdin_serial (); 1741 1742 async_init_signals (); 1743 1744 /* We need a default language for parsing expressions, so simple 1745 things like "set width 0" won't fail if no language is explicitly 1746 set in a config file or implicitly set by reading an executable 1747 during startup. */ 1748 set_language (language_c); 1749 expected_language = current_language; /* Don't warn about the change. */ 1750 1751 /* Allow another UI to initialize. If the UI fails to initialize, 1752 and it wants GDB to revert to the CLI, it should clear 1753 deprecated_init_ui_hook. */ 1754 if (deprecated_init_ui_hook) 1755 deprecated_init_ui_hook (argv0); 1756 1757 #ifdef HAVE_PYTHON 1758 /* Python initialization can require various commands to be 1759 installed. For example "info pretty-printer" needs the "info" 1760 prefix to be installed. Keep things simple and just do final 1761 python initialization here. */ 1762 finish_python_initialization (); 1763 #endif 1764 } 1765