1 /* Top level stuff for GDB, the GNU debugger. 2 3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 5 2008, 2009 Free Software Foundation, Inc. 6 7 This file is part of GDB. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 21 22 #include "defs.h" 23 #include "gdbcmd.h" 24 #include "call-cmds.h" 25 #include "cli/cli-cmds.h" 26 #include "cli/cli-script.h" 27 #include "cli/cli-setshow.h" 28 #include "cli/cli-decode.h" 29 #include "symtab.h" 30 #include "inferior.h" 31 #include "exceptions.h" 32 #include <signal.h> 33 #include "target.h" 34 #include "breakpoint.h" 35 #include "gdbtypes.h" 36 #include "expression.h" 37 #include "value.h" 38 #include "language.h" 39 #include "terminal.h" /* For job_control. */ 40 #include "annotate.h" 41 #include "completer.h" 42 #include "top.h" 43 #include "version.h" 44 #include "serial.h" 45 #include "doublest.h" 46 #include "gdb_assert.h" 47 #include "main.h" 48 #include "event-loop.h" 49 #include "gdbthread.h" 50 51 /* readline include files */ 52 #include "readline/readline.h" 53 #include "readline/history.h" 54 55 /* readline defines this. */ 56 #undef savestring 57 58 #include <sys/types.h> 59 60 #include "event-top.h" 61 #include "gdb_string.h" 62 #include "gdb_stat.h" 63 #include <ctype.h> 64 #include "ui-out.h" 65 #include "cli-out.h" 66 67 /* Default command line prompt. This is overriden in some configs. */ 68 69 #ifndef DEFAULT_PROMPT 70 #define DEFAULT_PROMPT "(gdb) " 71 #endif 72 73 /* Initialization file name for gdb. This is overridden in some configs. */ 74 75 #ifndef PATH_MAX 76 # ifdef FILENAME_MAX 77 # define PATH_MAX FILENAME_MAX 78 # else 79 # define PATH_MAX 512 80 # endif 81 #endif 82 83 #ifndef GDBINIT_FILENAME 84 #define GDBINIT_FILENAME ".gdbinit" 85 #endif 86 char gdbinit[PATH_MAX + 1] = GDBINIT_FILENAME; 87 88 int inhibit_gdbinit = 0; 89 90 /* If nonzero, and GDB has been configured to be able to use windows, 91 attempt to open them upon startup. */ 92 93 int use_windows = 0; 94 95 extern char lang_frame_mismatch_warn[]; /* language.c */ 96 97 /* Flag for whether we want all the "from_tty" gubbish printed. */ 98 99 int caution = 1; /* Default is yes, sigh. */ 100 static void 101 show_caution (struct ui_file *file, int from_tty, 102 struct cmd_list_element *c, const char *value) 103 { 104 fprintf_filtered (file, _("\ 105 Whether to confirm potentially dangerous operations is %s.\n"), 106 value); 107 } 108 109 /* stdio stream that command input is being read from. Set to stdin normally. 110 Set by source_command to the file we are sourcing. Set to NULL if we are 111 executing a user-defined command or interacting via a GUI. */ 112 113 FILE *instream; 114 115 /* Flag to indicate whether a user defined command is currently running. */ 116 117 int in_user_command; 118 119 /* Current working directory. */ 120 121 char *current_directory; 122 123 /* The directory name is actually stored here (usually). */ 124 char gdb_dirbuf[1024]; 125 126 /* Function to call before reading a command, if nonzero. 127 The function receives two args: an input stream, 128 and a prompt string. */ 129 130 void (*window_hook) (FILE *, char *); 131 132 int epoch_interface; 133 int xgdb_verbose; 134 135 /* Buffer used for reading command lines, and the size 136 allocated for it so far. */ 137 138 char *line; 139 int linesize = 100; 140 141 /* Nonzero if the current command is modified by "server ". This 142 affects things like recording into the command history, commands 143 repeating on RETURN, etc. This is so a user interface (emacs, GUI, 144 whatever) can issue its own commands and also send along commands 145 from the user, and have the user not notice that the user interface 146 is issuing commands too. */ 147 int server_command; 148 149 /* Baud rate specified for talking to serial target systems. Default 150 is left as -1, so targets can choose their own defaults. */ 151 /* FIXME: This means that "show remotebaud" and gr_files_info can print -1 152 or (unsigned int)-1. This is a Bad User Interface. */ 153 154 int baud_rate = -1; 155 156 /* Timeout limit for response from target. */ 157 158 /* The default value has been changed many times over the years. It 159 was originally 5 seconds. But that was thought to be a long time 160 to sit and wait, so it was changed to 2 seconds. That was thought 161 to be plenty unless the connection was going through some terminal 162 server or multiplexer or other form of hairy serial connection. 163 164 In mid-1996, remote_timeout was moved from remote.c to top.c and 165 it began being used in other remote-* targets. It appears that the 166 default was changed to 20 seconds at that time, perhaps because the 167 Renesas E7000 ICE didn't always respond in a timely manner. 168 169 But if 5 seconds is a long time to sit and wait for retransmissions, 170 20 seconds is far worse. This demonstrates the difficulty of using 171 a single variable for all protocol timeouts. 172 173 As remote.c is used much more than remote-e7000.c, it was changed 174 back to 2 seconds in 1999. */ 175 176 int remote_timeout = 2; 177 178 /* Non-zero tells remote* modules to output debugging info. */ 179 180 int remote_debug = 0; 181 182 /* Sbrk location on entry to main. Used for statistics only. */ 183 #ifdef HAVE_SBRK 184 char *lim_at_start; 185 #endif 186 187 /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */ 188 189 #ifndef STOP_SIGNAL 190 #ifdef SIGTSTP 191 #define STOP_SIGNAL SIGTSTP 192 static void stop_sig (int); 193 #endif 194 #endif 195 196 /* Hooks for alternate command interfaces. */ 197 198 /* Called after most modules have been initialized, but before taking users 199 command file. 200 201 If the UI fails to initialize and it wants GDB to continue 202 using the default UI, then it should clear this hook before returning. */ 203 204 void (*deprecated_init_ui_hook) (char *argv0); 205 206 /* This hook is called from within gdb's many mini-event loops which could 207 steal control from a real user interface's event loop. It returns 208 non-zero if the user is requesting a detach, zero otherwise. */ 209 210 int (*deprecated_ui_loop_hook) (int); 211 212 /* Called instead of command_loop at top level. Can be invoked via 213 throw_exception(). */ 214 215 void (*deprecated_command_loop_hook) (void); 216 217 218 /* Called from print_frame_info to list the line we stopped in. */ 219 220 void (*deprecated_print_frame_info_listing_hook) (struct symtab * s, int line, 221 int stopline, int noerror); 222 /* Replaces most of query. */ 223 224 int (*deprecated_query_hook) (const char *, va_list); 225 226 /* Replaces most of warning. */ 227 228 void (*deprecated_warning_hook) (const char *, va_list); 229 230 /* These three functions support getting lines of text from the user. 231 They are used in sequence. First deprecated_readline_begin_hook is 232 called with a text string that might be (for example) a message for 233 the user to type in a sequence of commands to be executed at a 234 breakpoint. If this function calls back to a GUI, it might take 235 this opportunity to pop up a text interaction window with this 236 message. Next, deprecated_readline_hook is called with a prompt 237 that is emitted prior to collecting the user input. It can be 238 called multiple times. Finally, deprecated_readline_end_hook is 239 called to notify the GUI that we are done with the interaction 240 window and it can close it. */ 241 242 void (*deprecated_readline_begin_hook) (char *, ...); 243 char *(*deprecated_readline_hook) (char *); 244 void (*deprecated_readline_end_hook) (void); 245 246 /* Called as appropriate to notify the interface that we have attached 247 to or detached from an already running process. */ 248 249 void (*deprecated_attach_hook) (void); 250 void (*deprecated_detach_hook) (void); 251 252 /* Called during long calculations to allow GUI to repair window damage, and to 253 check for stop buttons, etc... */ 254 255 void (*deprecated_interactive_hook) (void); 256 257 /* Tell the GUI someone changed the register REGNO. -1 means 258 that the caller does not know which register changed or 259 that several registers have changed (see value_assign). */ 260 void (*deprecated_register_changed_hook) (int regno); 261 262 /* Tell the GUI someone changed LEN bytes of memory at ADDR */ 263 void (*deprecated_memory_changed_hook) (CORE_ADDR addr, int len); 264 265 /* Called when going to wait for the target. Usually allows the GUI to run 266 while waiting for target events. */ 267 268 ptid_t (*deprecated_target_wait_hook) (ptid_t ptid, 269 struct target_waitstatus *status, 270 int options); 271 272 /* Used by UI as a wrapper around command execution. May do various things 273 like enabling/disabling buttons, etc... */ 274 275 void (*deprecated_call_command_hook) (struct cmd_list_element * c, char *cmd, 276 int from_tty); 277 278 /* Called after a `set' command has finished. Is only run if the 279 `set' command succeeded. */ 280 281 void (*deprecated_set_hook) (struct cmd_list_element * c); 282 283 /* Called when the current thread changes. Argument is thread id. */ 284 285 void (*deprecated_context_hook) (int id); 286 287 /* Handler for SIGHUP. */ 288 289 #ifdef SIGHUP 290 /* NOTE 1999-04-29: This function will be static again, once we modify 291 gdb to use the event loop as the default command loop and we merge 292 event-top.c into this file, top.c */ 293 /* static */ int 294 quit_cover (void *s) 295 { 296 caution = 0; /* Throw caution to the wind -- we're exiting. 297 This prevents asking the user dumb questions. */ 298 quit_command ((char *) 0, 0); 299 return 0; 300 } 301 #endif /* defined SIGHUP */ 302 303 /* Line number we are currently in in a file which is being sourced. */ 304 /* NOTE 1999-04-29: This variable will be static again, once we modify 305 gdb to use the event loop as the default command loop and we merge 306 event-top.c into this file, top.c */ 307 /* static */ int source_line_number; 308 309 /* Name of the file we are sourcing. */ 310 /* NOTE 1999-04-29: This variable will be static again, once we modify 311 gdb to use the event loop as the default command loop and we merge 312 event-top.c into this file, top.c */ 313 /* static */ char *source_file_name; 314 315 /* Clean up on error during a "source" command (or execution of a 316 user-defined command). */ 317 318 void 319 do_restore_instream_cleanup (void *stream) 320 { 321 /* Restore the previous input stream. */ 322 instream = stream; 323 } 324 325 /* Read commands from STREAM. */ 326 void 327 read_command_file (FILE *stream) 328 { 329 struct cleanup *cleanups; 330 331 cleanups = make_cleanup (do_restore_instream_cleanup, instream); 332 instream = stream; 333 command_loop (); 334 do_cleanups (cleanups); 335 } 336 337 void (*pre_init_ui_hook) (void); 338 339 #ifdef __MSDOS__ 340 void 341 do_chdir_cleanup (void *old_dir) 342 { 343 chdir (old_dir); 344 xfree (old_dir); 345 } 346 #endif 347 348 void 349 prepare_execute_command (void) 350 { 351 free_all_values (); 352 353 /* With multiple threads running while the one we're examining is stopped, 354 the dcache can get stale without us being able to detect it. 355 For the duration of the command, though, use the dcache to help 356 things like backtrace. */ 357 if (non_stop) 358 target_dcache_invalidate (); 359 } 360 361 /* Execute the line P as a command, in the current user context. 362 Pass FROM_TTY as second argument to the defining function. */ 363 364 void 365 execute_command (char *p, int from_tty) 366 { 367 struct cmd_list_element *c; 368 enum language flang; 369 static int warned = 0; 370 char *line; 371 long time_at_cmd_start = 0; 372 #ifdef HAVE_SBRK 373 long space_at_cmd_start = 0; 374 #endif 375 extern int display_time; 376 extern int display_space; 377 378 if (target_can_async_p ()) 379 { 380 time_at_cmd_start = get_run_time (); 381 382 if (display_space) 383 { 384 #ifdef HAVE_SBRK 385 char *lim = (char *) sbrk (0); 386 space_at_cmd_start = lim - lim_at_start; 387 #endif 388 } 389 } 390 391 prepare_execute_command (); 392 393 /* Force cleanup of any alloca areas if using C alloca instead of 394 a builtin alloca. */ 395 alloca (0); 396 397 /* This can happen when command_line_input hits end of file. */ 398 if (p == NULL) 399 return; 400 401 target_log_command (p); 402 403 while (*p == ' ' || *p == '\t') 404 p++; 405 if (*p) 406 { 407 char *arg; 408 line = p; 409 410 /* If trace-commands is set then this will print this command. */ 411 print_command_trace (p); 412 413 c = lookup_cmd (&p, cmdlist, "", 0, 1); 414 415 /* Pass null arg rather than an empty one. */ 416 arg = *p ? p : 0; 417 418 /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy 419 while the is_complete_command(cfunc) test is just plain 420 bogus. They should both be replaced by a test of the form 421 c->strip_trailing_white_space_p. */ 422 /* NOTE: cagney/2002-02-02: The function.cfunc in the below 423 can't be replaced with func. This is because it is the 424 cfunc, and not the func, that has the value that the 425 is_complete_command hack is testing for. */ 426 /* Clear off trailing whitespace, except for set and complete 427 command. */ 428 if (arg 429 && c->type != set_cmd 430 && !is_complete_command (c)) 431 { 432 p = arg + strlen (arg) - 1; 433 while (p >= arg && (*p == ' ' || *p == '\t')) 434 p--; 435 *(p + 1) = '\0'; 436 } 437 438 /* If this command has been pre-hooked, run the hook first. */ 439 execute_cmd_pre_hook (c); 440 441 if (c->flags & DEPRECATED_WARN_USER) 442 deprecated_cmd_warning (&line); 443 444 if (c->class == class_user) 445 execute_user_command (c, arg); 446 else if (c->type == set_cmd || c->type == show_cmd) 447 do_setshow_command (arg, from_tty & caution, c); 448 else if (!cmd_func_p (c)) 449 error (_("That is not a command, just a help topic.")); 450 else if (deprecated_call_command_hook) 451 deprecated_call_command_hook (c, arg, from_tty & caution); 452 else 453 cmd_func (c, arg, from_tty & caution); 454 455 /* If this command has been post-hooked, run the hook last. */ 456 execute_cmd_post_hook (c); 457 458 } 459 460 /* Tell the user if the language has changed (except first time). */ 461 if (current_language != expected_language) 462 { 463 if (language_mode == language_mode_auto) 464 { 465 language_info (1); /* Print what changed. */ 466 } 467 warned = 0; 468 } 469 470 /* Warn the user if the working language does not match the 471 language of the current frame. Only warn the user if we are 472 actually running the program, i.e. there is a stack. */ 473 /* FIXME: This should be cacheing the frame and only running when 474 the frame changes. */ 475 476 if (has_stack_frames ()) 477 { 478 flang = get_frame_language (); 479 if (!warned 480 && flang != language_unknown 481 && flang != current_language->la_language) 482 { 483 printf_filtered ("%s\n", lang_frame_mismatch_warn); 484 warned = 1; 485 } 486 } 487 } 488 489 /* Read commands from `instream' and execute them 490 until end of file or error reading instream. */ 491 492 void 493 command_loop (void) 494 { 495 struct cleanup *old_chain; 496 char *command; 497 int stdin_is_tty = ISATTY (stdin); 498 long time_at_cmd_start; 499 #ifdef HAVE_SBRK 500 long space_at_cmd_start = 0; 501 #endif 502 extern int display_time; 503 extern int display_space; 504 505 while (instream && !feof (instream)) 506 { 507 if (window_hook && instream == stdin) 508 (*window_hook) (instream, get_prompt ()); 509 510 quit_flag = 0; 511 if (instream == stdin && stdin_is_tty) 512 reinitialize_more_filter (); 513 old_chain = make_cleanup (null_cleanup, 0); 514 515 /* Get a command-line. This calls the readline package. */ 516 command = command_line_input (instream == stdin ? 517 get_prompt () : (char *) NULL, 518 instream == stdin, "prompt"); 519 if (command == 0) 520 return; 521 522 time_at_cmd_start = get_run_time (); 523 524 if (display_space) 525 { 526 #ifdef HAVE_SBRK 527 char *lim = (char *) sbrk (0); 528 space_at_cmd_start = lim - lim_at_start; 529 #endif 530 } 531 532 execute_command (command, instream == stdin); 533 534 /* Do any commands attached to breakpoint we are stopped at. */ 535 bpstat_do_actions (); 536 537 do_cleanups (old_chain); 538 539 if (display_time) 540 { 541 long cmd_time = get_run_time () - time_at_cmd_start; 542 543 printf_unfiltered (_("Command execution time: %ld.%06ld\n"), 544 cmd_time / 1000000, cmd_time % 1000000); 545 } 546 547 if (display_space) 548 { 549 #ifdef HAVE_SBRK 550 char *lim = (char *) sbrk (0); 551 long space_now = lim - lim_at_start; 552 long space_diff = space_now - space_at_cmd_start; 553 554 printf_unfiltered (_("Space used: %ld (%s%ld for this command)\n"), 555 space_now, 556 (space_diff >= 0 ? "+" : ""), 557 space_diff); 558 #endif 559 } 560 } 561 } 562 563 /* Commands call this if they do not want to be repeated by null lines. */ 564 565 void 566 dont_repeat (void) 567 { 568 if (server_command) 569 return; 570 571 /* If we aren't reading from standard input, we are saving the last 572 thing read from stdin in line and don't want to delete it. Null lines 573 won't repeat here in any case. */ 574 if (instream == stdin) 575 *line = 0; 576 } 577 578 /* Read a line from the stream "instream" without command line editing. 579 580 It prints PROMPT_ARG once at the start. 581 Action is compatible with "readline", e.g. space for the result is 582 malloc'd and should be freed by the caller. 583 584 A NULL return means end of file. */ 585 char * 586 gdb_readline (char *prompt_arg) 587 { 588 int c; 589 char *result; 590 int input_index = 0; 591 int result_size = 80; 592 593 if (prompt_arg) 594 { 595 /* Don't use a _filtered function here. It causes the assumed 596 character position to be off, since the newline we read from 597 the user is not accounted for. */ 598 fputs_unfiltered (prompt_arg, gdb_stdout); 599 gdb_flush (gdb_stdout); 600 } 601 602 result = (char *) xmalloc (result_size); 603 604 while (1) 605 { 606 /* Read from stdin if we are executing a user defined command. 607 This is the right thing for prompt_for_continue, at least. */ 608 c = fgetc (instream ? instream : stdin); 609 610 if (c == EOF) 611 { 612 if (input_index > 0) 613 /* The last line does not end with a newline. Return it, and 614 if we are called again fgetc will still return EOF and 615 we'll return NULL then. */ 616 break; 617 xfree (result); 618 return NULL; 619 } 620 621 if (c == '\n') 622 { 623 if (input_index > 0 && result[input_index - 1] == '\r') 624 input_index--; 625 break; 626 } 627 628 result[input_index++] = c; 629 while (input_index >= result_size) 630 { 631 result_size *= 2; 632 result = (char *) xrealloc (result, result_size); 633 } 634 } 635 636 result[input_index++] = '\0'; 637 return result; 638 } 639 640 /* Variables which control command line editing and history 641 substitution. These variables are given default values at the end 642 of this file. */ 643 static int command_editing_p; 644 645 /* NOTE 1999-04-29: This variable will be static again, once we modify 646 gdb to use the event loop as the default command loop and we merge 647 event-top.c into this file, top.c */ 648 649 /* static */ int history_expansion_p; 650 651 static int write_history_p; 652 static void 653 show_write_history_p (struct ui_file *file, int from_tty, 654 struct cmd_list_element *c, const char *value) 655 { 656 fprintf_filtered (file, _("Saving of the history record on exit is %s.\n"), 657 value); 658 } 659 660 static int history_size; 661 static void 662 show_history_size (struct ui_file *file, int from_tty, 663 struct cmd_list_element *c, const char *value) 664 { 665 fprintf_filtered (file, _("The size of the command history is %s.\n"), 666 value); 667 } 668 669 static char *history_filename; 670 static void 671 show_history_filename (struct ui_file *file, int from_tty, 672 struct cmd_list_element *c, const char *value) 673 { 674 fprintf_filtered (file, _("\ 675 The filename in which to record the command history is \"%s\".\n"), 676 value); 677 } 678 679 /* This is like readline(), but it has some gdb-specific behavior. 680 gdb may want readline in both the synchronous and async modes during 681 a single gdb invocation. At the ordinary top-level prompt we might 682 be using the async readline. That means we can't use 683 rl_pre_input_hook, since it doesn't work properly in async mode. 684 However, for a secondary prompt (" >", such as occurs during a 685 `define'), gdb wants a synchronous response. 686 687 We used to call readline() directly, running it in synchronous 688 mode. But mixing modes this way is not supported, and as of 689 readline 5.x it no longer works; the arrow keys come unbound during 690 the synchronous call. So we make a nested call into the event 691 loop. That's what gdb_readline_wrapper is for. */ 692 693 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't 694 rely on gdb_readline_wrapper_result, which might still be NULL if 695 the user types Control-D for EOF. */ 696 static int gdb_readline_wrapper_done; 697 698 /* The result of the current call to gdb_readline_wrapper, once a newline 699 is seen. */ 700 static char *gdb_readline_wrapper_result; 701 702 /* Any intercepted hook. Operate-and-get-next sets this, expecting it 703 to be called after the newline is processed (which will redisplay 704 the prompt). But in gdb_readline_wrapper we will not get a new 705 prompt until the next call, or until we return to the event loop. 706 So we disable this hook around the newline and restore it before we 707 return. */ 708 static void (*saved_after_char_processing_hook) (void); 709 710 /* This function is called when readline has seen a complete line of 711 text. */ 712 713 static void 714 gdb_readline_wrapper_line (char *line) 715 { 716 gdb_assert (!gdb_readline_wrapper_done); 717 gdb_readline_wrapper_result = line; 718 gdb_readline_wrapper_done = 1; 719 720 /* Prevent operate-and-get-next from acting too early. */ 721 saved_after_char_processing_hook = after_char_processing_hook; 722 after_char_processing_hook = NULL; 723 724 /* Prevent parts of the prompt from being redisplayed if annotations 725 are enabled, and readline's state getting out of sync. */ 726 if (async_command_editing_p) 727 rl_callback_handler_remove (); 728 } 729 730 struct gdb_readline_wrapper_cleanup 731 { 732 void (*handler_orig) (char *); 733 int already_prompted_orig; 734 }; 735 736 static void 737 gdb_readline_wrapper_cleanup (void *arg) 738 { 739 struct gdb_readline_wrapper_cleanup *cleanup = arg; 740 741 rl_already_prompted = cleanup->already_prompted_orig; 742 743 gdb_assert (input_handler == gdb_readline_wrapper_line); 744 input_handler = cleanup->handler_orig; 745 gdb_readline_wrapper_result = NULL; 746 gdb_readline_wrapper_done = 0; 747 748 after_char_processing_hook = saved_after_char_processing_hook; 749 saved_after_char_processing_hook = NULL; 750 751 xfree (cleanup); 752 } 753 754 char * 755 gdb_readline_wrapper (char *prompt) 756 { 757 struct cleanup *back_to; 758 struct gdb_readline_wrapper_cleanup *cleanup; 759 char *retval; 760 761 cleanup = xmalloc (sizeof (*cleanup)); 762 cleanup->handler_orig = input_handler; 763 input_handler = gdb_readline_wrapper_line; 764 765 cleanup->already_prompted_orig = rl_already_prompted; 766 767 back_to = make_cleanup (gdb_readline_wrapper_cleanup, cleanup); 768 769 /* Display our prompt and prevent double prompt display. */ 770 display_gdb_prompt (prompt); 771 rl_already_prompted = 1; 772 773 if (after_char_processing_hook) 774 (*after_char_processing_hook) (); 775 gdb_assert (after_char_processing_hook == NULL); 776 777 /* gdb_do_one_event argument is unused. */ 778 while (gdb_do_one_event (NULL) >= 0) 779 if (gdb_readline_wrapper_done) 780 break; 781 782 retval = gdb_readline_wrapper_result; 783 do_cleanups (back_to); 784 return retval; 785 } 786 787 788 #ifdef STOP_SIGNAL 789 static void 790 stop_sig (int signo) 791 { 792 #if STOP_SIGNAL == SIGTSTP 793 signal (SIGTSTP, SIG_DFL); 794 #if HAVE_SIGPROCMASK 795 { 796 sigset_t zero; 797 798 sigemptyset (&zero); 799 sigprocmask (SIG_SETMASK, &zero, 0); 800 } 801 #elif HAVE_SIGSETMASK 802 sigsetmask (0); 803 #endif 804 kill (getpid (), SIGTSTP); 805 signal (SIGTSTP, stop_sig); 806 #else 807 signal (STOP_SIGNAL, stop_sig); 808 #endif 809 printf_unfiltered ("%s", get_prompt ()); 810 gdb_flush (gdb_stdout); 811 812 /* Forget about any previous command -- null line now will do nothing. */ 813 dont_repeat (); 814 } 815 #endif /* STOP_SIGNAL */ 816 817 /* Initialize signal handlers. */ 818 static void 819 float_handler (int signo) 820 { 821 /* This message is based on ANSI C, section 4.7. Note that integer 822 divide by zero causes this, so "float" is a misnomer. */ 823 signal (SIGFPE, float_handler); 824 error (_("Erroneous arithmetic operation.")); 825 } 826 827 static void 828 do_nothing (int signo) 829 { 830 /* Under System V the default disposition of a signal is reinstated after 831 the signal is caught and delivered to an application process. On such 832 systems one must restore the replacement signal handler if one wishes 833 to continue handling the signal in one's program. On BSD systems this 834 is not needed but it is harmless, and it simplifies the code to just do 835 it unconditionally. */ 836 signal (signo, do_nothing); 837 } 838 839 /* The current saved history number from operate-and-get-next. 840 This is -1 if not valid. */ 841 static int operate_saved_history = -1; 842 843 /* This is put on the appropriate hook and helps operate-and-get-next 844 do its work. */ 845 static void 846 gdb_rl_operate_and_get_next_completion (void) 847 { 848 int delta = where_history () - operate_saved_history; 849 /* The `key' argument to rl_get_previous_history is ignored. */ 850 rl_get_previous_history (delta, 0); 851 operate_saved_history = -1; 852 853 /* readline doesn't automatically update the display for us. */ 854 rl_redisplay (); 855 856 after_char_processing_hook = NULL; 857 rl_pre_input_hook = NULL; 858 } 859 860 /* This is a gdb-local readline command handler. It accepts the 861 current command line (like RET does) and, if this command was taken 862 from the history, arranges for the next command in the history to 863 appear on the command line when the prompt returns. 864 We ignore the arguments. */ 865 static int 866 gdb_rl_operate_and_get_next (int count, int key) 867 { 868 int where; 869 870 /* Use the async hook. */ 871 after_char_processing_hook = gdb_rl_operate_and_get_next_completion; 872 873 /* Find the current line, and find the next line to use. */ 874 where = where_history(); 875 876 /* FIXME: kettenis/20020817: max_input_history is renamed into 877 history_max_entries in readline-4.2. When we do a new readline 878 import, we should probably change it here too, even though 879 readline maintains backwards compatibility for now by still 880 defining max_input_history. */ 881 if ((history_is_stifled () && (history_length >= max_input_history)) || 882 (where >= history_length - 1)) 883 operate_saved_history = where; 884 else 885 operate_saved_history = where + 1; 886 887 return rl_newline (1, key); 888 } 889 890 /* Read one line from the command input stream `instream' 891 into the local static buffer `linebuffer' (whose current length 892 is `linelength'). 893 The buffer is made bigger as necessary. 894 Returns the address of the start of the line. 895 896 NULL is returned for end of file. 897 898 *If* the instream == stdin & stdin is a terminal, the line read 899 is copied into the file line saver (global var char *line, 900 length linesize) so that it can be duplicated. 901 902 This routine either uses fancy command line editing or 903 simple input as the user has requested. */ 904 905 char * 906 command_line_input (char *prompt_arg, int repeat, char *annotation_suffix) 907 { 908 static char *linebuffer = 0; 909 static unsigned linelength = 0; 910 char *p; 911 char *p1; 912 char *rl; 913 char *local_prompt = prompt_arg; 914 char *nline; 915 char got_eof = 0; 916 917 /* The annotation suffix must be non-NULL. */ 918 if (annotation_suffix == NULL) 919 annotation_suffix = ""; 920 921 if (annotation_level > 1 && instream == stdin) 922 { 923 local_prompt = alloca ((prompt_arg == NULL ? 0 : strlen (prompt_arg)) 924 + strlen (annotation_suffix) + 40); 925 if (prompt_arg == NULL) 926 local_prompt[0] = '\0'; 927 else 928 strcpy (local_prompt, prompt_arg); 929 strcat (local_prompt, "\n\032\032"); 930 strcat (local_prompt, annotation_suffix); 931 strcat (local_prompt, "\n"); 932 } 933 934 if (linebuffer == 0) 935 { 936 linelength = 80; 937 linebuffer = (char *) xmalloc (linelength); 938 } 939 940 p = linebuffer; 941 942 /* Control-C quits instantly if typed while in this loop 943 since it should not wait until the user types a newline. */ 944 immediate_quit++; 945 #ifdef STOP_SIGNAL 946 if (job_control) 947 signal (STOP_SIGNAL, handle_stop_sig); 948 #endif 949 950 while (1) 951 { 952 /* Make sure that all output has been output. Some machines may let 953 you get away with leaving out some of the gdb_flush, but not all. */ 954 wrap_here (""); 955 gdb_flush (gdb_stdout); 956 gdb_flush (gdb_stderr); 957 958 if (source_file_name != NULL) 959 ++source_line_number; 960 961 if (annotation_level > 1 && instream == stdin) 962 { 963 puts_unfiltered ("\n\032\032pre-"); 964 puts_unfiltered (annotation_suffix); 965 puts_unfiltered ("\n"); 966 } 967 968 /* Don't use fancy stuff if not talking to stdin. */ 969 if (deprecated_readline_hook && input_from_terminal_p ()) 970 { 971 rl = (*deprecated_readline_hook) (local_prompt); 972 } 973 else if (command_editing_p && input_from_terminal_p ()) 974 { 975 rl = gdb_readline_wrapper (local_prompt); 976 } 977 else 978 { 979 rl = gdb_readline (local_prompt); 980 } 981 982 if (annotation_level > 1 && instream == stdin) 983 { 984 puts_unfiltered ("\n\032\032post-"); 985 puts_unfiltered (annotation_suffix); 986 puts_unfiltered ("\n"); 987 } 988 989 if (!rl || rl == (char *) EOF) 990 { 991 got_eof = 1; 992 break; 993 } 994 if (strlen (rl) + 1 + (p - linebuffer) > linelength) 995 { 996 linelength = strlen (rl) + 1 + (p - linebuffer); 997 nline = (char *) xrealloc (linebuffer, linelength); 998 p += nline - linebuffer; 999 linebuffer = nline; 1000 } 1001 p1 = rl; 1002 /* Copy line. Don't copy null at end. (Leaves line alone 1003 if this was just a newline) */ 1004 while (*p1) 1005 *p++ = *p1++; 1006 1007 xfree (rl); /* Allocated in readline. */ 1008 1009 if (p == linebuffer || *(p - 1) != '\\') 1010 break; 1011 1012 p--; /* Put on top of '\'. */ 1013 local_prompt = (char *) 0; 1014 } 1015 1016 #ifdef STOP_SIGNAL 1017 if (job_control) 1018 signal (STOP_SIGNAL, SIG_DFL); 1019 #endif 1020 immediate_quit--; 1021 1022 if (got_eof) 1023 return NULL; 1024 1025 #define SERVER_COMMAND_LENGTH 7 1026 server_command = 1027 (p - linebuffer > SERVER_COMMAND_LENGTH) 1028 && strncmp (linebuffer, "server ", SERVER_COMMAND_LENGTH) == 0; 1029 if (server_command) 1030 { 1031 /* Note that we don't set `line'. Between this and the check in 1032 dont_repeat, this insures that repeating will still do the 1033 right thing. */ 1034 *p = '\0'; 1035 return linebuffer + SERVER_COMMAND_LENGTH; 1036 } 1037 1038 /* Do history expansion if that is wished. */ 1039 if (history_expansion_p && instream == stdin 1040 && ISATTY (instream)) 1041 { 1042 char *history_value; 1043 int expanded; 1044 1045 *p = '\0'; /* Insert null now. */ 1046 expanded = history_expand (linebuffer, &history_value); 1047 if (expanded) 1048 { 1049 /* Print the changes. */ 1050 printf_unfiltered ("%s\n", history_value); 1051 1052 /* If there was an error, call this function again. */ 1053 if (expanded < 0) 1054 { 1055 xfree (history_value); 1056 return command_line_input (prompt_arg, repeat, annotation_suffix); 1057 } 1058 if (strlen (history_value) > linelength) 1059 { 1060 linelength = strlen (history_value) + 1; 1061 linebuffer = (char *) xrealloc (linebuffer, linelength); 1062 } 1063 strcpy (linebuffer, history_value); 1064 p = linebuffer + strlen (linebuffer); 1065 } 1066 xfree (history_value); 1067 } 1068 1069 /* If we just got an empty line, and that is supposed 1070 to repeat the previous command, return the value in the 1071 global buffer. */ 1072 if (repeat && p == linebuffer) 1073 return line; 1074 for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++); 1075 if (repeat && !*p1) 1076 return line; 1077 1078 *p = 0; 1079 1080 /* Add line to history if appropriate. */ 1081 if (instream == stdin 1082 && ISATTY (stdin) && *linebuffer) 1083 add_history (linebuffer); 1084 1085 /* Note: lines consisting solely of comments are added to the command 1086 history. This is useful when you type a command, and then 1087 realize you don't want to execute it quite yet. You can comment 1088 out the command and then later fetch it from the value history 1089 and remove the '#'. The kill ring is probably better, but some 1090 people are in the habit of commenting things out. */ 1091 if (*p1 == '#') 1092 *p1 = '\0'; /* Found a comment. */ 1093 1094 /* Save into global buffer if appropriate. */ 1095 if (repeat) 1096 { 1097 if (linelength > linesize) 1098 { 1099 line = xrealloc (line, linelength); 1100 linesize = linelength; 1101 } 1102 strcpy (line, linebuffer); 1103 return line; 1104 } 1105 1106 return linebuffer; 1107 } 1108 1109 /* Print the GDB banner. */ 1110 void 1111 print_gdb_version (struct ui_file *stream) 1112 { 1113 /* From GNU coding standards, first line is meant to be easy for a 1114 program to parse, and is just canonical program name and version 1115 number, which starts after last space. */ 1116 1117 fprintf_filtered (stream, "GNU gdb %s%s\n", PKGVERSION, version); 1118 1119 /* Second line is a copyright notice. */ 1120 1121 fprintf_filtered (stream, "Copyright (C) 2009 Free Software Foundation, Inc.\n"); 1122 1123 /* Following the copyright is a brief statement that the program is 1124 free software, that users are free to copy and change it on 1125 certain conditions, that it is covered by the GNU GPL, and that 1126 there is no warranty. */ 1127 1128 fprintf_filtered (stream, "\ 1129 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n\ 1130 This is free software: you are free to change and redistribute it.\n\ 1131 There is NO WARRANTY, to the extent permitted by law. Type \"show copying\"\n\ 1132 and \"show warranty\" for details.\n"); 1133 1134 /* After the required info we print the configuration information. */ 1135 1136 fprintf_filtered (stream, "This GDB was configured as \""); 1137 if (strcmp (host_name, target_name) != 0) 1138 { 1139 fprintf_filtered (stream, "--host=%s --target=%s", host_name, target_name); 1140 } 1141 else 1142 { 1143 fprintf_filtered (stream, "%s", host_name); 1144 } 1145 fprintf_filtered (stream, "\"."); 1146 1147 if (REPORT_BUGS_TO[0]) 1148 { 1149 fprintf_filtered (stream, 1150 _("\nFor bug reporting instructions, please see:\n")); 1151 fprintf_filtered (stream, "%s.", REPORT_BUGS_TO); 1152 } 1153 } 1154 1155 /* get_prompt: access method for the GDB prompt string. */ 1156 1157 char * 1158 get_prompt (void) 1159 { 1160 return PROMPT (0); 1161 } 1162 1163 void 1164 set_prompt (char *s) 1165 { 1166 /* ??rehrauer: I don't know why this fails, since it looks as though 1167 assignments to prompt are wrapped in calls to xstrdup... 1168 if (prompt != NULL) 1169 xfree (prompt); 1170 */ 1171 PROMPT (0) = xstrdup (s); 1172 } 1173 1174 1175 struct qt_args 1176 { 1177 char *args; 1178 int from_tty; 1179 }; 1180 1181 /* Callback for iterate_over_inferiors. Kills or detaches the given 1182 inferior, depending on how we originally gained control of it. */ 1183 1184 static int 1185 kill_or_detach (struct inferior *inf, void *args) 1186 { 1187 struct qt_args *qt = args; 1188 struct thread_info *thread; 1189 1190 thread = any_thread_of_process (inf->pid); 1191 if (thread != NULL) 1192 { 1193 switch_to_thread (thread->ptid); 1194 1195 /* Leave core files alone. */ 1196 if (target_has_execution) 1197 { 1198 if (inf->attach_flag) 1199 target_detach (qt->args, qt->from_tty); 1200 else 1201 target_kill (); 1202 } 1203 } 1204 1205 return 0; 1206 } 1207 1208 /* Callback for iterate_over_inferiors. Prints info about what GDB 1209 will do to each inferior on a "quit". ARG points to a struct 1210 ui_out where output is to be collected. */ 1211 1212 static int 1213 print_inferior_quit_action (struct inferior *inf, void *arg) 1214 { 1215 struct ui_file *stb = arg; 1216 1217 if (inf->attach_flag) 1218 fprintf_filtered (stb, 1219 _("\tInferior %d [%s] will be detached.\n"), inf->num, 1220 target_pid_to_str (pid_to_ptid (inf->pid))); 1221 else 1222 fprintf_filtered (stb, 1223 _("\tInferior %d [%s] will be killed.\n"), inf->num, 1224 target_pid_to_str (pid_to_ptid (inf->pid))); 1225 1226 return 0; 1227 } 1228 1229 /* If necessary, make the user confirm that we should quit. Return 1230 non-zero if we should quit, zero if we shouldn't. */ 1231 1232 int 1233 quit_confirm (void) 1234 { 1235 struct ui_file *stb; 1236 struct cleanup *old_chain; 1237 char *str; 1238 int qr; 1239 1240 /* Don't even ask if we're only debugging a core file inferior. */ 1241 if (!have_live_inferiors ()) 1242 return 1; 1243 1244 /* Build the query string as a single string. */ 1245 stb = mem_fileopen (); 1246 old_chain = make_cleanup_ui_file_delete (stb); 1247 1248 /* This is something of a hack. But there's no reliable way to see 1249 if a GUI is running. The `use_windows' variable doesn't cut 1250 it. */ 1251 if (deprecated_init_ui_hook) 1252 fprintf_filtered (stb, _("A debugging session is active.\n" 1253 "Do you still want to close the debugger?")); 1254 else 1255 { 1256 fprintf_filtered (stb, _("A debugging session is active.\n\n")); 1257 iterate_over_inferiors (print_inferior_quit_action, stb); 1258 fprintf_filtered (stb, _("\nQuit anyway? ")); 1259 } 1260 1261 str = ui_file_xstrdup (stb, NULL); 1262 make_cleanup (xfree, str); 1263 1264 qr = query ("%s", str); 1265 do_cleanups (old_chain); 1266 return qr; 1267 } 1268 1269 /* Helper routine for quit_force that requires error handling. */ 1270 1271 static int 1272 quit_target (void *arg) 1273 { 1274 struct qt_args *qt = (struct qt_args *)arg; 1275 1276 /* Kill or detach all inferiors. */ 1277 iterate_over_inferiors (kill_or_detach, qt); 1278 1279 /* Give all pushed targets a chance to do minimal cleanup, and pop 1280 them all out. */ 1281 pop_all_targets (1); 1282 1283 /* Save the history information if it is appropriate to do so. */ 1284 if (write_history_p && history_filename) 1285 write_history (history_filename); 1286 1287 do_final_cleanups (ALL_CLEANUPS); /* Do any final cleanups before exiting */ 1288 1289 return 0; 1290 } 1291 1292 /* Quit without asking for confirmation. */ 1293 1294 void 1295 quit_force (char *args, int from_tty) 1296 { 1297 int exit_code = 0; 1298 struct qt_args qt; 1299 1300 /* An optional expression may be used to cause gdb to terminate with the 1301 value of that expression. */ 1302 if (args) 1303 { 1304 struct value *val = parse_and_eval (args); 1305 1306 exit_code = (int) value_as_long (val); 1307 } 1308 else if (return_child_result) 1309 exit_code = return_child_result_value; 1310 1311 qt.args = args; 1312 qt.from_tty = from_tty; 1313 1314 /* We want to handle any quit errors and exit regardless. */ 1315 catch_errors (quit_target, &qt, 1316 "Quitting: ", RETURN_MASK_ALL); 1317 1318 exit (exit_code); 1319 } 1320 1321 /* If OFF, the debugger will run in non-interactive mode, which means 1322 that it will automatically select the default answer to all the 1323 queries made to the user. If ON, gdb will wait for the user to 1324 answer all queries. If AUTO, gdb will determine whether to run 1325 in interactive mode or not depending on whether stdin is a terminal 1326 or not. */ 1327 static enum auto_boolean interactive_mode = AUTO_BOOLEAN_AUTO; 1328 1329 /* Implement the "show interactive-mode" option. */ 1330 1331 static void 1332 show_interactive_mode (struct ui_file *file, int from_tty, 1333 struct cmd_list_element *c, 1334 const char *value) 1335 { 1336 if (interactive_mode == AUTO_BOOLEAN_AUTO) 1337 fprintf_filtered (file, "\ 1338 Debugger's interactive mode is %s (currently %s).\n", 1339 value, input_from_terminal_p () ? "on" : "off"); 1340 else 1341 fprintf_filtered (file, "Debugger's interactive mode is %s.\n", value); 1342 } 1343 1344 /* Returns whether GDB is running on a terminal and input is 1345 currently coming from that terminal. */ 1346 1347 int 1348 input_from_terminal_p (void) 1349 { 1350 if (interactive_mode != AUTO_BOOLEAN_AUTO) 1351 return interactive_mode == AUTO_BOOLEAN_TRUE; 1352 1353 if (gdb_has_a_terminal () && instream == stdin) 1354 return 1; 1355 1356 /* If INSTREAM is unset, and we are not in a user command, we 1357 must be in Insight. That's like having a terminal, for our 1358 purposes. */ 1359 if (instream == NULL && !in_user_command) 1360 return 1; 1361 1362 return 0; 1363 } 1364 1365 static void 1366 dont_repeat_command (char *ignored, int from_tty) 1367 { 1368 *line = 0; /* Can't call dont_repeat here because we're not 1369 necessarily reading from stdin. */ 1370 } 1371 1372 /* Functions to manipulate command line editing control variables. */ 1373 1374 /* Number of commands to print in each call to show_commands. */ 1375 #define Hist_print 10 1376 void 1377 show_commands (char *args, int from_tty) 1378 { 1379 /* Index for history commands. Relative to history_base. */ 1380 int offset; 1381 1382 /* Number of the history entry which we are planning to display next. 1383 Relative to history_base. */ 1384 static int num = 0; 1385 1386 /* The first command in the history which doesn't exist (i.e. one more 1387 than the number of the last command). Relative to history_base. */ 1388 int hist_len; 1389 1390 /* Print out some of the commands from the command history. */ 1391 /* First determine the length of the history list. */ 1392 hist_len = history_size; 1393 for (offset = 0; offset < history_size; offset++) 1394 { 1395 if (!history_get (history_base + offset)) 1396 { 1397 hist_len = offset; 1398 break; 1399 } 1400 } 1401 1402 if (args) 1403 { 1404 if (args[0] == '+' && args[1] == '\0') 1405 /* "info editing +" should print from the stored position. */ 1406 ; 1407 else 1408 /* "info editing <exp>" should print around command number <exp>. */ 1409 num = (parse_and_eval_long (args) - history_base) - Hist_print / 2; 1410 } 1411 /* "show commands" means print the last Hist_print commands. */ 1412 else 1413 { 1414 num = hist_len - Hist_print; 1415 } 1416 1417 if (num < 0) 1418 num = 0; 1419 1420 /* If there are at least Hist_print commands, we want to display the last 1421 Hist_print rather than, say, the last 6. */ 1422 if (hist_len - num < Hist_print) 1423 { 1424 num = hist_len - Hist_print; 1425 if (num < 0) 1426 num = 0; 1427 } 1428 1429 for (offset = num; offset < num + Hist_print && offset < hist_len; offset++) 1430 { 1431 printf_filtered ("%5d %s\n", history_base + offset, 1432 (history_get (history_base + offset))->line); 1433 } 1434 1435 /* The next command we want to display is the next one that we haven't 1436 displayed yet. */ 1437 num += Hist_print; 1438 1439 /* If the user repeats this command with return, it should do what 1440 "show commands +" does. This is unnecessary if arg is null, 1441 because "show commands +" is not useful after "show commands". */ 1442 if (from_tty && args) 1443 { 1444 args[0] = '+'; 1445 args[1] = '\0'; 1446 } 1447 } 1448 1449 /* Called by do_setshow_command. */ 1450 static void 1451 set_history_size_command (char *args, int from_tty, struct cmd_list_element *c) 1452 { 1453 if (history_size == INT_MAX) 1454 unstifle_history (); 1455 else if (history_size >= 0) 1456 stifle_history (history_size); 1457 else 1458 { 1459 history_size = INT_MAX; 1460 error (_("History size must be non-negative")); 1461 } 1462 } 1463 1464 void 1465 set_history (char *args, int from_tty) 1466 { 1467 printf_unfiltered (_("\"set history\" must be followed 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 1488 if (info_verbose) 1489 { 1490 c->doc = "Set verbose printing of informational messages."; 1491 showcmd->doc = "Show verbose printing of informational messages."; 1492 } 1493 else 1494 { 1495 c->doc = "Set verbosity."; 1496 showcmd->doc = "Show verbosity."; 1497 } 1498 } 1499 1500 /* Init the history buffer. Note that we are called after the init file(s) 1501 * have been read so that the user can change the history file via his 1502 * .gdbinit file (for instance). The GDBHISTFILE environment variable 1503 * overrides all of this. 1504 */ 1505 1506 void 1507 init_history (void) 1508 { 1509 char *tmpenv; 1510 1511 tmpenv = getenv ("HISTSIZE"); 1512 if (tmpenv) 1513 history_size = atoi (tmpenv); 1514 else if (!history_size) 1515 history_size = 256; 1516 1517 stifle_history (history_size); 1518 1519 tmpenv = getenv ("GDBHISTFILE"); 1520 if (tmpenv) 1521 history_filename = xstrdup (tmpenv); 1522 else if (!history_filename) 1523 { 1524 /* We include the current directory so that if the user changes 1525 directories the file written will be the same as the one 1526 that was read. */ 1527 #ifdef __MSDOS__ 1528 /* No leading dots in file names are allowed on MSDOS. */ 1529 history_filename = concat (current_directory, "/_gdb_history", 1530 (char *)NULL); 1531 #else 1532 history_filename = concat (current_directory, "/.gdb_history", 1533 (char *)NULL); 1534 #endif 1535 } 1536 read_history (history_filename); 1537 } 1538 1539 static void 1540 show_new_async_prompt (struct ui_file *file, int from_tty, 1541 struct cmd_list_element *c, const char *value) 1542 { 1543 fprintf_filtered (file, _("Gdb's prompt is \"%s\".\n"), value); 1544 } 1545 1546 static void 1547 show_async_command_editing_p (struct ui_file *file, int from_tty, 1548 struct cmd_list_element *c, const char *value) 1549 { 1550 fprintf_filtered (file, _("\ 1551 Editing of command lines as they are typed is %s.\n"), 1552 value); 1553 } 1554 1555 static void 1556 show_annotation_level (struct ui_file *file, int from_tty, 1557 struct cmd_list_element *c, const char *value) 1558 { 1559 fprintf_filtered (file, _("Annotation_level is %s.\n"), value); 1560 } 1561 1562 static void 1563 show_exec_done_display_p (struct ui_file *file, int from_tty, 1564 struct cmd_list_element *c, const char *value) 1565 { 1566 fprintf_filtered (file, _("\ 1567 Notification of completion for asynchronous execution commands is %s.\n"), 1568 value); 1569 } 1570 static void 1571 init_main (void) 1572 { 1573 struct cmd_list_element *c; 1574 1575 /* initialize the prompt stack to a simple "(gdb) " prompt or to 1576 whatever the DEFAULT_PROMPT is. */ 1577 the_prompts.top = 0; 1578 PREFIX (0) = ""; 1579 PROMPT (0) = xstrdup (DEFAULT_PROMPT); 1580 SUFFIX (0) = ""; 1581 /* Set things up for annotation_level > 1, if the user ever decides 1582 to use it. */ 1583 async_annotation_suffix = "prompt"; 1584 /* Set the variable associated with the setshow prompt command. */ 1585 new_async_prompt = xstrdup (PROMPT (0)); 1586 1587 /* If gdb was started with --annotate=2, this is equivalent to the 1588 user entering the command 'set annotate 2' at the gdb prompt, so 1589 we need to do extra processing. */ 1590 if (annotation_level > 1) 1591 set_async_annotation_level (NULL, 0, NULL); 1592 1593 /* Set the important stuff up for command editing. */ 1594 command_editing_p = 1; 1595 history_expansion_p = 0; 1596 write_history_p = 0; 1597 1598 /* Setup important stuff for command line editing. */ 1599 rl_completion_word_break_hook = gdb_completion_word_break_characters; 1600 rl_completion_entry_function = readline_line_completion_function; 1601 rl_completer_word_break_characters = default_word_break_characters (); 1602 rl_completer_quote_characters = get_gdb_completer_quote_characters (); 1603 rl_readline_name = "gdb"; 1604 rl_terminal_name = getenv ("TERM"); 1605 1606 /* The name for this defun comes from Bash, where it originated. 1607 15 is Control-o, the same binding this function has in Bash. */ 1608 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15); 1609 1610 add_setshow_string_cmd ("prompt", class_support, 1611 &new_async_prompt, _("\ 1612 Set gdb's prompt"), _("\ 1613 Show gdb's prompt"), NULL, 1614 set_async_prompt, 1615 show_new_async_prompt, 1616 &setlist, &showlist); 1617 1618 add_com ("dont-repeat", class_support, dont_repeat_command, _("\ 1619 Don't repeat this command.\n\ 1620 Primarily used inside of user-defined commands that should not be repeated when\n\ 1621 hitting return.")); 1622 1623 add_setshow_boolean_cmd ("editing", class_support, 1624 &async_command_editing_p, _("\ 1625 Set editing of command lines as they are typed."), _("\ 1626 Show editing of command lines as they are typed."), _("\ 1627 Use \"on\" to enable the editing, and \"off\" to disable it.\n\ 1628 Without an argument, command line editing is enabled. To edit, use\n\ 1629 EMACS-like or VI-like commands like control-P or ESC."), 1630 set_async_editing_command, 1631 show_async_command_editing_p, 1632 &setlist, &showlist); 1633 1634 add_setshow_boolean_cmd ("save", no_class, &write_history_p, _("\ 1635 Set saving of the history record on exit."), _("\ 1636 Show saving of the history record on exit."), _("\ 1637 Use \"on\" to enable the saving, and \"off\" to disable it.\n\ 1638 Without an argument, saving is enabled."), 1639 NULL, 1640 show_write_history_p, 1641 &sethistlist, &showhistlist); 1642 1643 add_setshow_integer_cmd ("size", no_class, &history_size, _("\ 1644 Set the size of the command history,"), _("\ 1645 Show the size of the command history,"), _("\ 1646 ie. the number of previous commands to keep a record of."), 1647 set_history_size_command, 1648 show_history_size, 1649 &sethistlist, &showhistlist); 1650 1651 add_setshow_filename_cmd ("filename", no_class, &history_filename, _("\ 1652 Set the filename in which to record the command history"), _("\ 1653 Show the filename in which to record the command history"), _("\ 1654 (the list of previous commands of which a record is kept)."), 1655 NULL, 1656 show_history_filename, 1657 &sethistlist, &showhistlist); 1658 1659 add_setshow_boolean_cmd ("confirm", class_support, &caution, _("\ 1660 Set whether to confirm potentially dangerous operations."), _("\ 1661 Show whether to confirm potentially dangerous operations."), NULL, 1662 NULL, 1663 show_caution, 1664 &setlist, &showlist); 1665 1666 add_setshow_zinteger_cmd ("annotate", class_obscure, &annotation_level, _("\ 1667 Set annotation_level."), _("\ 1668 Show annotation_level."), _("\ 1669 0 == normal; 1 == fullname (for use when running under emacs)\n\ 1670 2 == output annotated suitably for use by programs that control GDB."), 1671 set_async_annotation_level, 1672 show_annotation_level, 1673 &setlist, &showlist); 1674 1675 add_setshow_boolean_cmd ("exec-done-display", class_support, 1676 &exec_done_display_p, _("\ 1677 Set notification of completion for asynchronous execution commands."), _("\ 1678 Show notification of completion for asynchronous execution commands."), _("\ 1679 Use \"on\" to enable the notification, and \"off\" to disable it."), 1680 NULL, 1681 show_exec_done_display_p, 1682 &setlist, &showlist); 1683 1684 add_setshow_auto_boolean_cmd ("interactive-mode", class_support, 1685 &interactive_mode, _("\ 1686 Set whether GDB should run in interactive mode or not"), _("\ 1687 Show whether GDB runs in interactive mode"), _("\ 1688 If on, run in interactive mode and wait for the user to answer\n\ 1689 all queries. If off, run in non-interactive mode and automatically\n\ 1690 assume the default answer to all queries. If auto (the default),\n\ 1691 determine which mode to use based on the standard input settings"), 1692 NULL, 1693 show_interactive_mode, 1694 &setlist, &showlist); 1695 1696 add_setshow_filename_cmd ("data-directory", class_maintenance, 1697 &gdb_datadir, _("Set GDB's data directory."), 1698 _("Show GDB's data directory."), 1699 _("\ 1700 When set, GDB uses the specified path to search for data files."), 1701 NULL, NULL, 1702 &setlist, 1703 &showlist); 1704 } 1705 1706 void 1707 gdb_init (char *argv0) 1708 { 1709 if (pre_init_ui_hook) 1710 pre_init_ui_hook (); 1711 1712 /* Run the init function of each source file */ 1713 1714 #ifdef __MSDOS__ 1715 /* Make sure we return to the original directory upon exit, come 1716 what may, since the OS doesn't do that for us. */ 1717 make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory)); 1718 #endif 1719 1720 init_cmd_lists (); /* This needs to be done first */ 1721 initialize_targets (); /* Setup target_terminal macros for utils.c */ 1722 initialize_utils (); /* Make errors and warnings possible */ 1723 initialize_all_files (); 1724 initialize_current_architecture (); 1725 init_cli_cmds(); 1726 init_main (); /* But that omits this file! Do it now */ 1727 1728 initialize_stdin_serial (); 1729 1730 async_init_signals (); 1731 1732 /* We need a default language for parsing expressions, so simple things like 1733 "set width 0" won't fail if no language is explicitly set in a config file 1734 or implicitly set by reading an executable during startup. */ 1735 set_language (language_c); 1736 expected_language = current_language; /* don't warn about the change. */ 1737 1738 /* Allow another UI to initialize. If the UI fails to initialize, 1739 and it wants GDB to revert to the CLI, it should clear 1740 deprecated_init_ui_hook. */ 1741 if (deprecated_init_ui_hook) 1742 deprecated_init_ui_hook (argv0); 1743 } 1744