Rename common to gdbsupport
[deliverable/binutils-gdb.git] / gdb / top.c
1 /* Top level stuff for GDB, the GNU debugger.
2
3 Copyright (C) 1986-2019 Free Software Foundation, Inc.
4
5 This file is part of GDB.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19
20 #include "defs.h"
21 #include "gdbcmd.h"
22 #include "cli/cli-cmds.h"
23 #include "cli/cli-script.h"
24 #include "cli/cli-setshow.h"
25 #include "cli/cli-decode.h"
26 #include "symtab.h"
27 #include "inferior.h"
28 #include "infrun.h"
29 #include <signal.h>
30 #include "target.h"
31 #include "target-dcache.h"
32 #include "breakpoint.h"
33 #include "gdbtypes.h"
34 #include "expression.h"
35 #include "value.h"
36 #include "language.h"
37 #include "terminal.h"
38 #include "gdbsupport/job-control.h"
39 #include "annotate.h"
40 #include "completer.h"
41 #include "top.h"
42 #include "gdbsupport/version.h"
43 #include "serial.h"
44 #include "main.h"
45 #include "event-loop.h"
46 #include "gdbthread.h"
47 #include "extension.h"
48 #include "interps.h"
49 #include "observable.h"
50 #include "maint.h"
51 #include "filenames.h"
52 #include "frame.h"
53 #include "gdbsupport/buffer.h"
54 #include "gdb_select.h"
55 #include "gdbsupport/scope-exit.h"
56
57 /* readline include files. */
58 #include "readline/readline.h"
59 #include "readline/history.h"
60
61 /* readline defines this. */
62 #undef savestring
63
64 #include <sys/types.h>
65
66 #include "event-top.h"
67 #include <sys/stat.h>
68 #include <ctype.h>
69 #include "ui-out.h"
70 #include "cli-out.h"
71 #include "tracepoint.h"
72 #include "inf-loop.h"
73
74 #if defined(TUI)
75 # include "tui/tui.h"
76 #endif
77
78 #ifndef O_NOCTTY
79 # define O_NOCTTY 0
80 #endif
81
82 extern void initialize_all_files (void);
83
84 #define PROMPT(X) the_prompts.prompt_stack[the_prompts.top + X].prompt
85 #define PREFIX(X) the_prompts.prompt_stack[the_prompts.top + X].prefix
86 #define SUFFIX(X) the_prompts.prompt_stack[the_prompts.top + X].suffix
87
88 /* Default command line prompt. This is overriden in some configs. */
89
90 #ifndef DEFAULT_PROMPT
91 #define DEFAULT_PROMPT "(gdb) "
92 #endif
93
94 /* Generate a function that exports a pointer to a field of the
95 current UI. */
96
97 #define gen_ret_current_ui_field_ptr(type, name) \
98 type * \
99 current_ui_## name ## _ptr (void) \
100 { \
101 return &current_ui->m_ ## name; \
102 }
103
104 gen_ret_current_ui_field_ptr (struct ui_file *, gdb_stdout)
105 gen_ret_current_ui_field_ptr (struct ui_file *, gdb_stdin)
106 gen_ret_current_ui_field_ptr (struct ui_file *, gdb_stderr)
107 gen_ret_current_ui_field_ptr (struct ui_file *, gdb_stdlog)
108 gen_ret_current_ui_field_ptr (struct ui_out *, current_uiout)
109
110 /* Initialization file name for gdb. This is host-dependent. */
111
112 const char gdbinit[] = GDBINIT;
113
114 int inhibit_gdbinit = 0;
115
116 extern char lang_frame_mismatch_warn[]; /* language.c */
117
118 /* Flag for whether we want to confirm potentially dangerous
119 operations. Default is yes. */
120
121 int confirm = 1;
122
123 static void
124 show_confirm (struct ui_file *file, int from_tty,
125 struct cmd_list_element *c, const char *value)
126 {
127 fprintf_filtered (file, _("Whether to confirm potentially "
128 "dangerous operations is %s.\n"),
129 value);
130 }
131
132 /* Current working directory. */
133
134 char *current_directory;
135
136 /* The last command line executed on the console. Used for command
137 repetitions when the user enters an empty line. */
138
139 static char *saved_command_line;
140
141 /* If not NULL, the arguments that should be passed if
142 saved_command_line is repeated. */
143
144 static const char *repeat_arguments;
145
146 /* The previous last command line executed on the console. Used for command
147 repetitions when a command wants to relaunch the previously launched
148 command. We need this as when a command is running, saved_command_line
149 already contains the line of the currently executing command. */
150
151 char *previous_saved_command_line;
152
153 /* If not NULL, the arguments that should be passed if the
154 previous_saved_command_line is repeated. */
155
156 static const char *previous_repeat_arguments;
157
158 /* Nonzero if the current command is modified by "server ". This
159 affects things like recording into the command history, commands
160 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
161 whatever) can issue its own commands and also send along commands
162 from the user, and have the user not notice that the user interface
163 is issuing commands too. */
164 int server_command;
165
166 /* Timeout limit for response from target. */
167
168 /* The default value has been changed many times over the years. It
169 was originally 5 seconds. But that was thought to be a long time
170 to sit and wait, so it was changed to 2 seconds. That was thought
171 to be plenty unless the connection was going through some terminal
172 server or multiplexer or other form of hairy serial connection.
173
174 In mid-1996, remote_timeout was moved from remote.c to top.c and
175 it began being used in other remote-* targets. It appears that the
176 default was changed to 20 seconds at that time, perhaps because the
177 Renesas E7000 ICE didn't always respond in a timely manner.
178
179 But if 5 seconds is a long time to sit and wait for retransmissions,
180 20 seconds is far worse. This demonstrates the difficulty of using
181 a single variable for all protocol timeouts.
182
183 As remote.c is used much more than remote-e7000.c, it was changed
184 back to 2 seconds in 1999. */
185
186 int remote_timeout = 2;
187
188 /* Non-zero tells remote* modules to output debugging info. */
189
190 int remote_debug = 0;
191
192 /* Sbrk location on entry to main. Used for statistics only. */
193 #ifdef HAVE_USEFUL_SBRK
194 char *lim_at_start;
195 #endif
196
197 /* Hooks for alternate command interfaces. */
198
199 /* This hook is called from within gdb's many mini-event loops which
200 could steal control from a real user interface's event loop. It
201 returns non-zero if the user is requesting a detach, zero
202 otherwise. */
203
204 int (*deprecated_ui_loop_hook) (int);
205
206
207 /* Called from print_frame_info to list the line we stopped in. */
208
209 void (*deprecated_print_frame_info_listing_hook) (struct symtab * s,
210 int line,
211 int stopline,
212 int noerror);
213 /* Replaces most of query. */
214
215 int (*deprecated_query_hook) (const char *, va_list);
216
217 /* Replaces most of warning. */
218
219 void (*deprecated_warning_hook) (const char *, va_list);
220
221 /* These three functions support getting lines of text from the user.
222 They are used in sequence. First deprecated_readline_begin_hook is
223 called with a text string that might be (for example) a message for
224 the user to type in a sequence of commands to be executed at a
225 breakpoint. If this function calls back to a GUI, it might take
226 this opportunity to pop up a text interaction window with this
227 message. Next, deprecated_readline_hook is called with a prompt
228 that is emitted prior to collecting the user input. It can be
229 called multiple times. Finally, deprecated_readline_end_hook is
230 called to notify the GUI that we are done with the interaction
231 window and it can close it. */
232
233 void (*deprecated_readline_begin_hook) (const char *, ...);
234 char *(*deprecated_readline_hook) (const char *);
235 void (*deprecated_readline_end_hook) (void);
236
237 /* Called as appropriate to notify the interface that we have attached
238 to or detached from an already running process. */
239
240 void (*deprecated_attach_hook) (void);
241 void (*deprecated_detach_hook) (void);
242
243 /* Called when going to wait for the target. Usually allows the GUI
244 to run while waiting for target events. */
245
246 ptid_t (*deprecated_target_wait_hook) (ptid_t ptid,
247 struct target_waitstatus *status,
248 int options);
249
250 /* Used by UI as a wrapper around command execution. May do various
251 things like enabling/disabling buttons, etc... */
252
253 void (*deprecated_call_command_hook) (struct cmd_list_element * c,
254 const char *cmd, int from_tty);
255
256 /* Called when the current thread changes. Argument is thread id. */
257
258 void (*deprecated_context_hook) (int id);
259
260 /* The highest UI number ever assigned. */
261 static int highest_ui_num;
262
263 /* See top.h. */
264
265 ui::ui (FILE *instream_, FILE *outstream_, FILE *errstream_)
266 : next (nullptr),
267 num (++highest_ui_num),
268 call_readline (nullptr),
269 input_handler (nullptr),
270 command_editing (0),
271 interp_info (nullptr),
272 async (0),
273 secondary_prompt_depth (0),
274 stdin_stream (instream_),
275 instream (instream_),
276 outstream (outstream_),
277 errstream (errstream_),
278 input_fd (fileno (instream)),
279 input_interactive_p (ISATTY (instream)),
280 prompt_state (PROMPT_NEEDED),
281 m_gdb_stdout (new stdio_file (outstream)),
282 m_gdb_stdin (new stdio_file (instream)),
283 m_gdb_stderr (new stderr_file (errstream)),
284 m_gdb_stdlog (m_gdb_stderr),
285 m_current_uiout (nullptr)
286 {
287 buffer_init (&line_buffer);
288
289 if (ui_list == NULL)
290 ui_list = this;
291 else
292 {
293 struct ui *last;
294
295 for (last = ui_list; last->next != NULL; last = last->next)
296 ;
297 last->next = this;
298 }
299 }
300
301 ui::~ui ()
302 {
303 struct ui *ui, *uiprev;
304
305 uiprev = NULL;
306
307 for (ui = ui_list; ui != NULL; uiprev = ui, ui = ui->next)
308 if (ui == this)
309 break;
310
311 gdb_assert (ui != NULL);
312
313 if (uiprev != NULL)
314 uiprev->next = next;
315 else
316 ui_list = next;
317
318 delete m_gdb_stdin;
319 delete m_gdb_stdout;
320 delete m_gdb_stderr;
321 }
322
323 /* Open file named NAME for read/write, making sure not to make it the
324 controlling terminal. */
325
326 static gdb_file_up
327 open_terminal_stream (const char *name)
328 {
329 int fd;
330
331 fd = gdb_open_cloexec (name, O_RDWR | O_NOCTTY, 0);
332 if (fd < 0)
333 perror_with_name (_("opening terminal failed"));
334
335 return gdb_file_up (fdopen (fd, "w+"));
336 }
337
338 /* Implementation of the "new-ui" command. */
339
340 static void
341 new_ui_command (const char *args, int from_tty)
342 {
343 gdb_file_up stream[3];
344 int i;
345 int argc;
346 const char *interpreter_name;
347 const char *tty_name;
348
349 dont_repeat ();
350
351 gdb_argv argv (args);
352 argc = argv.count ();
353
354 if (argc < 2)
355 error (_("Usage: new-ui INTERPRETER TTY"));
356
357 interpreter_name = argv[0];
358 tty_name = argv[1];
359
360 {
361 scoped_restore save_ui = make_scoped_restore (&current_ui);
362
363 /* Open specified terminal, once for each of
364 stdin/stdout/stderr. */
365 for (i = 0; i < 3; i++)
366 stream[i] = open_terminal_stream (tty_name);
367
368 std::unique_ptr<ui> ui
369 (new struct ui (stream[0].get (), stream[1].get (), stream[2].get ()));
370
371 ui->async = 1;
372
373 current_ui = ui.get ();
374
375 set_top_level_interpreter (interpreter_name);
376
377 interp_pre_command_loop (top_level_interpreter ());
378
379 /* Make sure the files are not closed. */
380 stream[0].release ();
381 stream[1].release ();
382 stream[2].release ();
383
384 ui.release ();
385 }
386
387 printf_unfiltered ("New UI allocated\n");
388 }
389
390 /* Handler for SIGHUP. */
391
392 #ifdef SIGHUP
393 /* NOTE 1999-04-29: This function will be static again, once we modify
394 gdb to use the event loop as the default command loop and we merge
395 event-top.c into this file, top.c. */
396 /* static */ void
397 quit_cover (void)
398 {
399 /* Stop asking user for confirmation --- we're exiting. This
400 prevents asking the user dumb questions. */
401 confirm = 0;
402 quit_command ((char *) 0, 0);
403 }
404 #endif /* defined SIGHUP */
405 \f
406 /* Line number we are currently in, in a file which is being sourced. */
407 /* NOTE 1999-04-29: This variable will be static again, once we modify
408 gdb to use the event loop as the default command loop and we merge
409 event-top.c into this file, top.c. */
410 /* static */ int source_line_number;
411
412 /* Name of the file we are sourcing. */
413 /* NOTE 1999-04-29: This variable will be static again, once we modify
414 gdb to use the event loop as the default command loop and we merge
415 event-top.c into this file, top.c. */
416 /* static */ std::string source_file_name;
417
418 /* Read commands from STREAM. */
419 void
420 read_command_file (FILE *stream)
421 {
422 struct ui *ui = current_ui;
423
424 scoped_restore save_instream
425 = make_scoped_restore (&ui->instream, stream);
426
427 /* Read commands from `instream' and execute them until end of file
428 or error reading instream. */
429
430 while (ui->instream != NULL && !feof (ui->instream))
431 {
432 char *command;
433
434 /* Get a command-line. This calls the readline package. */
435 command = command_line_input (NULL, NULL);
436 if (command == NULL)
437 break;
438 command_handler (command);
439 }
440 }
441 \f
442 void (*pre_init_ui_hook) (void);
443
444 #ifdef __MSDOS__
445 static void
446 do_chdir_cleanup (void *old_dir)
447 {
448 chdir ((const char *) old_dir);
449 xfree (old_dir);
450 }
451 #endif
452
453 scoped_value_mark
454 prepare_execute_command ()
455 {
456 /* With multiple threads running while the one we're examining is
457 stopped, the dcache can get stale without us being able to detect
458 it. For the duration of the command, though, use the dcache to
459 help things like backtrace. */
460 if (non_stop)
461 target_dcache_invalidate ();
462
463 return scoped_value_mark ();
464 }
465
466 /* Tell the user if the language has changed (except first time) after
467 executing a command. */
468
469 void
470 check_frame_language_change (void)
471 {
472 static int warned = 0;
473 struct frame_info *frame;
474
475 /* First make sure that a new frame has been selected, in case the
476 command or the hooks changed the program state. */
477 frame = deprecated_safe_get_selected_frame ();
478 if (current_language != expected_language)
479 {
480 if (language_mode == language_mode_auto && info_verbose)
481 {
482 language_info (1); /* Print what changed. */
483 }
484 warned = 0;
485 }
486
487 /* Warn the user if the working language does not match the language
488 of the current frame. Only warn the user if we are actually
489 running the program, i.e. there is a stack. */
490 /* FIXME: This should be cacheing the frame and only running when
491 the frame changes. */
492
493 if (has_stack_frames ())
494 {
495 enum language flang;
496
497 flang = get_frame_language (frame);
498 if (!warned
499 && flang != language_unknown
500 && flang != current_language->la_language)
501 {
502 printf_filtered ("%s\n", lang_frame_mismatch_warn);
503 warned = 1;
504 }
505 }
506 }
507
508 /* See top.h. */
509
510 void
511 wait_sync_command_done (void)
512 {
513 /* Processing events may change the current UI. */
514 scoped_restore save_ui = make_scoped_restore (&current_ui);
515 struct ui *ui = current_ui;
516
517 while (gdb_do_one_event () >= 0)
518 if (ui->prompt_state != PROMPT_BLOCKED)
519 break;
520 }
521
522 /* See top.h. */
523
524 void
525 maybe_wait_sync_command_done (int was_sync)
526 {
527 /* If the interpreter is in sync mode (we're running a user
528 command's list, running command hooks or similars), and we
529 just ran a synchronous command that started the target, wait
530 for that command to end. */
531 if (!current_ui->async
532 && !was_sync
533 && current_ui->prompt_state == PROMPT_BLOCKED)
534 wait_sync_command_done ();
535 }
536
537 /* See command.h. */
538
539 void
540 set_repeat_arguments (const char *args)
541 {
542 repeat_arguments = args;
543 }
544
545 /* Execute the line P as a command, in the current user context.
546 Pass FROM_TTY as second argument to the defining function. */
547
548 void
549 execute_command (const char *p, int from_tty)
550 {
551 struct cmd_list_element *c;
552 const char *line;
553 const char *cmd_start = p;
554
555 auto cleanup_if_error = make_scope_exit (bpstat_clear_actions);
556 scoped_value_mark cleanup = prepare_execute_command ();
557
558 /* This can happen when command_line_input hits end of file. */
559 if (p == NULL)
560 {
561 cleanup_if_error.release ();
562 return;
563 }
564
565 target_log_command (p);
566
567 while (*p == ' ' || *p == '\t')
568 p++;
569 if (*p)
570 {
571 const char *cmd = p;
572 const char *arg;
573 int was_sync = current_ui->prompt_state == PROMPT_BLOCKED;
574
575 line = p;
576
577 /* If trace-commands is set then this will print this command. */
578 print_command_trace ("%s", p);
579
580 c = lookup_cmd (&cmd, cmdlist, "", 0, 1);
581 p = cmd;
582
583 scoped_restore save_repeat_args
584 = make_scoped_restore (&repeat_arguments, nullptr);
585 const char *args_pointer = p;
586
587 /* Pass null arg rather than an empty one. */
588 arg = *p ? p : 0;
589
590 /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy
591 while the is_complete_command(cfunc) test is just plain
592 bogus. They should both be replaced by a test of the form
593 c->strip_trailing_white_space_p. */
594 /* NOTE: cagney/2002-02-02: The function.cfunc in the below
595 can't be replaced with func. This is because it is the
596 cfunc, and not the func, that has the value that the
597 is_complete_command hack is testing for. */
598 /* Clear off trailing whitespace, except for set and complete
599 command. */
600 std::string without_whitespace;
601 if (arg
602 && c->type != set_cmd
603 && !is_complete_command (c))
604 {
605 const char *old_end = arg + strlen (arg) - 1;
606 p = old_end;
607 while (p >= arg && (*p == ' ' || *p == '\t'))
608 p--;
609 if (p != old_end)
610 {
611 without_whitespace = std::string (arg, p + 1);
612 arg = without_whitespace.c_str ();
613 }
614 }
615
616 /* If this command has been pre-hooked, run the hook first. */
617 execute_cmd_pre_hook (c);
618
619 if (c->deprecated_warn_user)
620 deprecated_cmd_warning (line);
621
622 /* c->user_commands would be NULL in the case of a python command. */
623 if (c->theclass == class_user && c->user_commands)
624 execute_user_command (c, arg);
625 else if (c->type == set_cmd)
626 do_set_command (arg, from_tty, c);
627 else if (c->type == show_cmd)
628 do_show_command (arg, from_tty, c);
629 else if (!cmd_func_p (c))
630 error (_("That is not a command, just a help topic."));
631 else if (deprecated_call_command_hook)
632 deprecated_call_command_hook (c, arg, from_tty);
633 else
634 cmd_func (c, arg, from_tty);
635
636 maybe_wait_sync_command_done (was_sync);
637
638 /* If this command has been post-hooked, run the hook last. */
639 execute_cmd_post_hook (c);
640
641 if (repeat_arguments != NULL && cmd_start == saved_command_line)
642 {
643 gdb_assert (strlen (args_pointer) >= strlen (repeat_arguments));
644 strcpy (saved_command_line + (args_pointer - cmd_start),
645 repeat_arguments);
646 }
647 }
648
649 /* Only perform the frame-language-change check if the command
650 we just finished executing did not resume the inferior's execution.
651 If it did resume the inferior, we will do that check after
652 the inferior stopped. */
653 if (has_stack_frames () && inferior_thread ()->state != THREAD_RUNNING)
654 check_frame_language_change ();
655
656 cleanup_if_error.release ();
657 }
658
659 /* Run execute_command for P and FROM_TTY. Sends its output to FILE,
660 do not display it to the screen. BATCH_FLAG will be
661 temporarily set to true. */
662
663 void
664 execute_command_to_ui_file (struct ui_file *file, const char *p, int from_tty)
665 {
666 /* GDB_STDOUT should be better already restored during these
667 restoration callbacks. */
668 set_batch_flag_and_restore_page_info save_page_info;
669
670 scoped_restore save_async = make_scoped_restore (&current_ui->async, 0);
671
672 {
673 current_uiout->redirect (file);
674 ui_out_redirect_pop redirect_popper (current_uiout);
675
676 scoped_restore save_stdout
677 = make_scoped_restore (&gdb_stdout, file);
678 scoped_restore save_stderr
679 = make_scoped_restore (&gdb_stderr, file);
680 scoped_restore save_stdlog
681 = make_scoped_restore (&gdb_stdlog, file);
682 scoped_restore save_stdtarg
683 = make_scoped_restore (&gdb_stdtarg, file);
684 scoped_restore save_stdtargerr
685 = make_scoped_restore (&gdb_stdtargerr, file);
686
687 execute_command (p, from_tty);
688 }
689 }
690
691 /* Run execute_command for P and FROM_TTY. Capture its output into the
692 returned string, do not display it to the screen. BATCH_FLAG will be
693 temporarily set to true. */
694
695 std::string
696 execute_command_to_string (const char *p, int from_tty,
697 bool term_out)
698 {
699 string_file str_file (term_out);
700
701 execute_command_to_ui_file (&str_file, p, from_tty);
702 return std::move (str_file.string ());
703 }
704
705 \f
706 /* When nonzero, cause dont_repeat to do nothing. This should only be
707 set via prevent_dont_repeat. */
708
709 static int suppress_dont_repeat = 0;
710
711 /* See command.h */
712
713 void
714 dont_repeat (void)
715 {
716 struct ui *ui = current_ui;
717
718 if (suppress_dont_repeat || server_command)
719 return;
720
721 /* If we aren't reading from standard input, we are saving the last
722 thing read from stdin in line and don't want to delete it. Null
723 lines won't repeat here in any case. */
724 if (ui->instream == ui->stdin_stream)
725 {
726 *saved_command_line = 0;
727 repeat_arguments = NULL;
728 }
729 }
730
731 /* See command.h */
732
733 const char *
734 repeat_previous ()
735 {
736 /* Do not repeat this command, as this command is a repeating command. */
737 dont_repeat ();
738
739 /* We cannot free saved_command_line, as this line is being executed,
740 so swap it with previous_saved_command_line. */
741 std::swap (previous_saved_command_line, saved_command_line);
742 std::swap (previous_repeat_arguments, repeat_arguments);
743
744 const char *prev = skip_spaces (get_saved_command_line ());
745 if (*prev == '\0')
746 error (_("No previous command to relaunch"));
747 return prev;
748 }
749
750 /* See command.h. */
751
752 scoped_restore_tmpl<int>
753 prevent_dont_repeat (void)
754 {
755 return make_scoped_restore (&suppress_dont_repeat, 1);
756 }
757
758 /* See command.h. */
759
760 char *
761 get_saved_command_line ()
762 {
763 return saved_command_line;
764 }
765
766 /* See command.h. */
767
768 void
769 save_command_line (const char *cmd)
770 {
771 xfree (previous_saved_command_line);
772 previous_saved_command_line = saved_command_line;
773 previous_repeat_arguments = repeat_arguments;
774 saved_command_line = xstrdup (cmd);
775 repeat_arguments = NULL;
776 }
777
778 \f
779 /* Read a line from the stream "instream" without command line editing.
780
781 It prints PROMPT once at the start.
782 Action is compatible with "readline", e.g. space for the result is
783 malloc'd and should be freed by the caller.
784
785 A NULL return means end of file. */
786
787 static char *
788 gdb_readline_no_editing (const char *prompt)
789 {
790 struct buffer line_buffer;
791 struct ui *ui = current_ui;
792 /* Read from stdin if we are executing a user defined command. This
793 is the right thing for prompt_for_continue, at least. */
794 FILE *stream = ui->instream != NULL ? ui->instream : stdin;
795 int fd = fileno (stream);
796
797 buffer_init (&line_buffer);
798
799 if (prompt != NULL)
800 {
801 /* Don't use a _filtered function here. It causes the assumed
802 character position to be off, since the newline we read from
803 the user is not accounted for. */
804 fputs_unfiltered (prompt, gdb_stdout);
805 gdb_flush (gdb_stdout);
806 }
807
808 while (1)
809 {
810 int c;
811 fd_set readfds;
812
813 QUIT;
814
815 /* Wait until at least one byte of data is available. Control-C
816 can interrupt interruptible_select, but not fgetc. */
817 FD_ZERO (&readfds);
818 FD_SET (fd, &readfds);
819 if (interruptible_select (fd + 1, &readfds, NULL, NULL, NULL) == -1)
820 {
821 if (errno == EINTR)
822 {
823 /* If this was ctrl-c, the QUIT above handles it. */
824 continue;
825 }
826 perror_with_name (("select"));
827 }
828
829 c = fgetc (stream);
830
831 if (c == EOF)
832 {
833 if (line_buffer.used_size > 0)
834 /* The last line does not end with a newline. Return it, and
835 if we are called again fgetc will still return EOF and
836 we'll return NULL then. */
837 break;
838 xfree (buffer_finish (&line_buffer));
839 return NULL;
840 }
841
842 if (c == '\n')
843 {
844 if (line_buffer.used_size > 0
845 && line_buffer.buffer[line_buffer.used_size - 1] == '\r')
846 line_buffer.used_size--;
847 break;
848 }
849
850 buffer_grow_char (&line_buffer, c);
851 }
852
853 buffer_grow_char (&line_buffer, '\0');
854 return buffer_finish (&line_buffer);
855 }
856
857 /* Variables which control command line editing and history
858 substitution. These variables are given default values at the end
859 of this file. */
860 static int command_editing_p;
861
862 /* NOTE 1999-04-29: This variable will be static again, once we modify
863 gdb to use the event loop as the default command loop and we merge
864 event-top.c into this file, top.c. */
865
866 /* static */ int history_expansion_p;
867
868 static int write_history_p;
869 static void
870 show_write_history_p (struct ui_file *file, int from_tty,
871 struct cmd_list_element *c, const char *value)
872 {
873 fprintf_filtered (file, _("Saving of the history record on exit is %s.\n"),
874 value);
875 }
876
877 /* The variable associated with the "set/show history size"
878 command. The value -1 means unlimited, and -2 means undefined. */
879 static int history_size_setshow_var = -2;
880
881 static void
882 show_history_size (struct ui_file *file, int from_tty,
883 struct cmd_list_element *c, const char *value)
884 {
885 fprintf_filtered (file, _("The size of the command history is %s.\n"),
886 value);
887 }
888
889 /* Variable associated with the "history remove-duplicates" option.
890 The value -1 means unlimited. */
891 static int history_remove_duplicates = 0;
892
893 static void
894 show_history_remove_duplicates (struct ui_file *file, int from_tty,
895 struct cmd_list_element *c, const char *value)
896 {
897 fprintf_filtered (file,
898 _("The number of history entries to look back at for "
899 "duplicates is %s.\n"),
900 value);
901 }
902
903 static char *history_filename;
904 static void
905 show_history_filename (struct ui_file *file, int from_tty,
906 struct cmd_list_element *c, const char *value)
907 {
908 fprintf_filtered (file, _("The filename in which to record "
909 "the command history is \"%s\".\n"),
910 value);
911 }
912
913 /* This is like readline(), but it has some gdb-specific behavior.
914 gdb may want readline in both the synchronous and async modes during
915 a single gdb invocation. At the ordinary top-level prompt we might
916 be using the async readline. That means we can't use
917 rl_pre_input_hook, since it doesn't work properly in async mode.
918 However, for a secondary prompt (" >", such as occurs during a
919 `define'), gdb wants a synchronous response.
920
921 We used to call readline() directly, running it in synchronous
922 mode. But mixing modes this way is not supported, and as of
923 readline 5.x it no longer works; the arrow keys come unbound during
924 the synchronous call. So we make a nested call into the event
925 loop. That's what gdb_readline_wrapper is for. */
926
927 /* A flag set as soon as gdb_readline_wrapper_line is called; we can't
928 rely on gdb_readline_wrapper_result, which might still be NULL if
929 the user types Control-D for EOF. */
930 static int gdb_readline_wrapper_done;
931
932 /* The result of the current call to gdb_readline_wrapper, once a newline
933 is seen. */
934 static char *gdb_readline_wrapper_result;
935
936 /* Any intercepted hook. Operate-and-get-next sets this, expecting it
937 to be called after the newline is processed (which will redisplay
938 the prompt). But in gdb_readline_wrapper we will not get a new
939 prompt until the next call, or until we return to the event loop.
940 So we disable this hook around the newline and restore it before we
941 return. */
942 static void (*saved_after_char_processing_hook) (void);
943
944
945 /* See top.h. */
946
947 int
948 gdb_in_secondary_prompt_p (struct ui *ui)
949 {
950 return ui->secondary_prompt_depth > 0;
951 }
952
953
954 /* This function is called when readline has seen a complete line of
955 text. */
956
957 static void
958 gdb_readline_wrapper_line (gdb::unique_xmalloc_ptr<char> &&line)
959 {
960 gdb_assert (!gdb_readline_wrapper_done);
961 gdb_readline_wrapper_result = line.release ();
962 gdb_readline_wrapper_done = 1;
963
964 /* Prevent operate-and-get-next from acting too early. */
965 saved_after_char_processing_hook = after_char_processing_hook;
966 after_char_processing_hook = NULL;
967
968 /* Prevent parts of the prompt from being redisplayed if annotations
969 are enabled, and readline's state getting out of sync. We'll
970 reinstall the callback handler, which puts the terminal in raw
971 mode (or in readline lingo, in prepped state), when we're next
972 ready to process user input, either in display_gdb_prompt, or if
973 we're handling an asynchronous target event and running in the
974 background, just before returning to the event loop to process
975 further input (or more target events). */
976 if (current_ui->command_editing)
977 gdb_rl_callback_handler_remove ();
978 }
979
980 class gdb_readline_wrapper_cleanup
981 {
982 public:
983 gdb_readline_wrapper_cleanup ()
984 : m_handler_orig (current_ui->input_handler),
985 m_already_prompted_orig (current_ui->command_editing
986 ? rl_already_prompted : 0),
987 m_target_is_async_orig (target_is_async_p ()),
988 m_save_ui (&current_ui)
989 {
990 current_ui->input_handler = gdb_readline_wrapper_line;
991 current_ui->secondary_prompt_depth++;
992
993 if (m_target_is_async_orig)
994 target_async (0);
995 }
996
997 ~gdb_readline_wrapper_cleanup ()
998 {
999 struct ui *ui = current_ui;
1000
1001 if (ui->command_editing)
1002 rl_already_prompted = m_already_prompted_orig;
1003
1004 gdb_assert (ui->input_handler == gdb_readline_wrapper_line);
1005 ui->input_handler = m_handler_orig;
1006
1007 /* Don't restore our input handler in readline yet. That would make
1008 readline prep the terminal (putting it in raw mode), while the
1009 line we just read may trigger execution of a command that expects
1010 the terminal in the default cooked/canonical mode, such as e.g.,
1011 running Python's interactive online help utility. See
1012 gdb_readline_wrapper_line for when we'll reinstall it. */
1013
1014 gdb_readline_wrapper_result = NULL;
1015 gdb_readline_wrapper_done = 0;
1016 ui->secondary_prompt_depth--;
1017 gdb_assert (ui->secondary_prompt_depth >= 0);
1018
1019 after_char_processing_hook = saved_after_char_processing_hook;
1020 saved_after_char_processing_hook = NULL;
1021
1022 if (m_target_is_async_orig)
1023 target_async (1);
1024 }
1025
1026 DISABLE_COPY_AND_ASSIGN (gdb_readline_wrapper_cleanup);
1027
1028 private:
1029
1030 void (*m_handler_orig) (gdb::unique_xmalloc_ptr<char> &&);
1031 int m_already_prompted_orig;
1032
1033 /* Whether the target was async. */
1034 int m_target_is_async_orig;
1035
1036 /* Processing events may change the current UI. */
1037 scoped_restore_tmpl<struct ui *> m_save_ui;
1038 };
1039
1040 char *
1041 gdb_readline_wrapper (const char *prompt)
1042 {
1043 struct ui *ui = current_ui;
1044
1045 gdb_readline_wrapper_cleanup cleanup;
1046
1047 /* Display our prompt and prevent double prompt display. Don't pass
1048 down a NULL prompt, since that has special meaning for
1049 display_gdb_prompt -- it indicates a request to print the primary
1050 prompt, while we want a secondary prompt here. */
1051 display_gdb_prompt (prompt != NULL ? prompt : "");
1052 if (ui->command_editing)
1053 rl_already_prompted = 1;
1054
1055 if (after_char_processing_hook)
1056 (*after_char_processing_hook) ();
1057 gdb_assert (after_char_processing_hook == NULL);
1058
1059 while (gdb_do_one_event () >= 0)
1060 if (gdb_readline_wrapper_done)
1061 break;
1062
1063 return gdb_readline_wrapper_result;
1064 }
1065
1066 \f
1067 /* The current saved history number from operate-and-get-next.
1068 This is -1 if not valid. */
1069 static int operate_saved_history = -1;
1070
1071 /* This is put on the appropriate hook and helps operate-and-get-next
1072 do its work. */
1073 static void
1074 gdb_rl_operate_and_get_next_completion (void)
1075 {
1076 int delta = where_history () - operate_saved_history;
1077
1078 /* The `key' argument to rl_get_previous_history is ignored. */
1079 rl_get_previous_history (delta, 0);
1080 operate_saved_history = -1;
1081
1082 /* readline doesn't automatically update the display for us. */
1083 rl_redisplay ();
1084
1085 after_char_processing_hook = NULL;
1086 rl_pre_input_hook = NULL;
1087 }
1088
1089 /* This is a gdb-local readline command handler. It accepts the
1090 current command line (like RET does) and, if this command was taken
1091 from the history, arranges for the next command in the history to
1092 appear on the command line when the prompt returns.
1093 We ignore the arguments. */
1094 static int
1095 gdb_rl_operate_and_get_next (int count, int key)
1096 {
1097 int where;
1098
1099 /* Use the async hook. */
1100 after_char_processing_hook = gdb_rl_operate_and_get_next_completion;
1101
1102 /* Find the current line, and find the next line to use. */
1103 where = where_history();
1104
1105 if ((history_is_stifled () && (history_length >= history_max_entries))
1106 || (where >= history_length - 1))
1107 operate_saved_history = where;
1108 else
1109 operate_saved_history = where + 1;
1110
1111 return rl_newline (1, key);
1112 }
1113
1114 /* Number of user commands executed during this session. */
1115
1116 static int command_count = 0;
1117
1118 /* Add the user command COMMAND to the input history list. */
1119
1120 void
1121 gdb_add_history (const char *command)
1122 {
1123 command_count++;
1124
1125 if (history_remove_duplicates != 0)
1126 {
1127 int lookbehind;
1128 int lookbehind_threshold;
1129
1130 /* The lookbehind threshold for finding a duplicate history entry is
1131 bounded by command_count because we can't meaningfully delete
1132 history entries that are already stored in the history file since
1133 the history file is appended to. */
1134 if (history_remove_duplicates == -1
1135 || history_remove_duplicates > command_count)
1136 lookbehind_threshold = command_count;
1137 else
1138 lookbehind_threshold = history_remove_duplicates;
1139
1140 using_history ();
1141 for (lookbehind = 0; lookbehind < lookbehind_threshold; lookbehind++)
1142 {
1143 HIST_ENTRY *temp = previous_history ();
1144
1145 if (temp == NULL)
1146 break;
1147
1148 if (strcmp (temp->line, command) == 0)
1149 {
1150 HIST_ENTRY *prev = remove_history (where_history ());
1151 command_count--;
1152 free_history_entry (prev);
1153 break;
1154 }
1155 }
1156 using_history ();
1157 }
1158
1159 add_history (command);
1160 }
1161
1162 /* Safely append new history entries to the history file in a corruption-free
1163 way using an intermediate local history file. */
1164
1165 static void
1166 gdb_safe_append_history (void)
1167 {
1168 int ret, saved_errno;
1169
1170 std::string local_history_filename
1171 = string_printf ("%s-gdb%ld~", history_filename, (long) getpid ());
1172
1173 ret = rename (history_filename, local_history_filename.c_str ());
1174 saved_errno = errno;
1175 if (ret < 0 && saved_errno != ENOENT)
1176 {
1177 warning (_("Could not rename %s to %s: %s"),
1178 history_filename, local_history_filename.c_str (),
1179 safe_strerror (saved_errno));
1180 }
1181 else
1182 {
1183 if (ret < 0)
1184 {
1185 /* If the rename failed with ENOENT then either the global history
1186 file never existed in the first place or another GDB process is
1187 currently appending to it (and has thus temporarily renamed it).
1188 Since we can't distinguish between these two cases, we have to
1189 conservatively assume the first case and therefore must write out
1190 (not append) our known history to our local history file and try
1191 to move it back anyway. Otherwise a global history file would
1192 never get created! */
1193 gdb_assert (saved_errno == ENOENT);
1194 write_history (local_history_filename.c_str ());
1195 }
1196 else
1197 {
1198 append_history (command_count, local_history_filename.c_str ());
1199 if (history_is_stifled ())
1200 history_truncate_file (local_history_filename.c_str (),
1201 history_max_entries);
1202 }
1203
1204 ret = rename (local_history_filename.c_str (), history_filename);
1205 saved_errno = errno;
1206 if (ret < 0 && saved_errno != EEXIST)
1207 warning (_("Could not rename %s to %s: %s"),
1208 local_history_filename.c_str (), history_filename,
1209 safe_strerror (saved_errno));
1210 }
1211 }
1212
1213 /* Read one line from the command input stream `instream' into a local
1214 static buffer. The buffer is made bigger as necessary. Returns
1215 the address of the start of the line.
1216
1217 NULL is returned for end of file.
1218
1219 This routine either uses fancy command line editing or simple input
1220 as the user has requested. */
1221
1222 char *
1223 command_line_input (const char *prompt_arg, const char *annotation_suffix)
1224 {
1225 static struct buffer cmd_line_buffer;
1226 static int cmd_line_buffer_initialized;
1227 struct ui *ui = current_ui;
1228 const char *prompt = prompt_arg;
1229 char *cmd;
1230 int from_tty = ui->instream == ui->stdin_stream;
1231
1232 /* The annotation suffix must be non-NULL. */
1233 if (annotation_suffix == NULL)
1234 annotation_suffix = "";
1235
1236 if (from_tty && annotation_level > 1)
1237 {
1238 char *local_prompt;
1239
1240 local_prompt
1241 = (char *) alloca ((prompt == NULL ? 0 : strlen (prompt))
1242 + strlen (annotation_suffix) + 40);
1243 if (prompt == NULL)
1244 local_prompt[0] = '\0';
1245 else
1246 strcpy (local_prompt, prompt);
1247 strcat (local_prompt, "\n\032\032");
1248 strcat (local_prompt, annotation_suffix);
1249 strcat (local_prompt, "\n");
1250
1251 prompt = local_prompt;
1252 }
1253
1254 if (!cmd_line_buffer_initialized)
1255 {
1256 buffer_init (&cmd_line_buffer);
1257 cmd_line_buffer_initialized = 1;
1258 }
1259
1260 /* Starting a new command line. */
1261 cmd_line_buffer.used_size = 0;
1262
1263 #ifdef SIGTSTP
1264 if (job_control)
1265 signal (SIGTSTP, handle_sigtstp);
1266 #endif
1267
1268 while (1)
1269 {
1270 gdb::unique_xmalloc_ptr<char> rl;
1271
1272 /* Make sure that all output has been output. Some machines may
1273 let you get away with leaving out some of the gdb_flush, but
1274 not all. */
1275 wrap_here ("");
1276 gdb_flush (gdb_stdout);
1277 gdb_flush (gdb_stderr);
1278
1279 if (!source_file_name.empty ())
1280 ++source_line_number;
1281
1282 if (from_tty && annotation_level > 1)
1283 {
1284 puts_unfiltered ("\n\032\032pre-");
1285 puts_unfiltered (annotation_suffix);
1286 puts_unfiltered ("\n");
1287 }
1288
1289 /* Don't use fancy stuff if not talking to stdin. */
1290 if (deprecated_readline_hook
1291 && from_tty
1292 && input_interactive_p (current_ui))
1293 {
1294 rl.reset ((*deprecated_readline_hook) (prompt));
1295 }
1296 else if (command_editing_p
1297 && from_tty
1298 && input_interactive_p (current_ui))
1299 {
1300 rl.reset (gdb_readline_wrapper (prompt));
1301 }
1302 else
1303 {
1304 rl.reset (gdb_readline_no_editing (prompt));
1305 }
1306
1307 cmd = handle_line_of_input (&cmd_line_buffer, rl.get (),
1308 0, annotation_suffix);
1309 if (cmd == (char *) EOF)
1310 {
1311 cmd = NULL;
1312 break;
1313 }
1314 if (cmd != NULL)
1315 break;
1316
1317 /* Got partial input. I.e., got a line that ends with a
1318 continuation character (backslash). Suppress printing the
1319 prompt again. */
1320 prompt = NULL;
1321 }
1322
1323 #ifdef SIGTSTP
1324 if (job_control)
1325 signal (SIGTSTP, SIG_DFL);
1326 #endif
1327
1328 return cmd;
1329 }
1330 \f
1331 /* See top.h. */
1332 void
1333 print_gdb_version (struct ui_file *stream, bool interactive)
1334 {
1335 /* From GNU coding standards, first line is meant to be easy for a
1336 program to parse, and is just canonical program name and version
1337 number, which starts after last space. */
1338
1339 ui_file_style style;
1340 if (interactive)
1341 {
1342 ui_file_style nstyle = { ui_file_style::MAGENTA, ui_file_style::NONE,
1343 ui_file_style::BOLD };
1344 style = nstyle;
1345 }
1346 fprintf_styled (stream, style, "GNU gdb %s%s\n", PKGVERSION, version);
1347
1348 /* Second line is a copyright notice. */
1349
1350 fprintf_filtered (stream,
1351 "Copyright (C) 2019 Free Software Foundation, Inc.\n");
1352
1353 /* Following the copyright is a brief statement that the program is
1354 free software, that users are free to copy and change it on
1355 certain conditions, that it is covered by the GNU GPL, and that
1356 there is no warranty. */
1357
1358 fprintf_filtered (stream, "\
1359 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\
1360 \nThis is free software: you are free to change and redistribute it.\n\
1361 There is NO WARRANTY, to the extent permitted by law.");
1362
1363 if (!interactive)
1364 return;
1365
1366 fprintf_filtered (stream, ("\nType \"show copying\" and "
1367 "\"show warranty\" for details.\n"));
1368
1369 /* After the required info we print the configuration information. */
1370
1371 fprintf_filtered (stream, "This GDB was configured as \"");
1372 if (strcmp (host_name, target_name) != 0)
1373 {
1374 fprintf_filtered (stream, "--host=%s --target=%s",
1375 host_name, target_name);
1376 }
1377 else
1378 {
1379 fprintf_filtered (stream, "%s", host_name);
1380 }
1381 fprintf_filtered (stream, "\".\n");
1382
1383 fprintf_filtered (stream, _("Type \"show configuration\" "
1384 "for configuration details.\n"));
1385
1386 if (REPORT_BUGS_TO[0])
1387 {
1388 fprintf_filtered (stream,
1389 _("For bug reporting instructions, please see:\n"));
1390 fprintf_filtered (stream, "%s.\n", REPORT_BUGS_TO);
1391 }
1392 fprintf_filtered (stream,
1393 _("Find the GDB manual and other documentation \
1394 resources online at:\n <http://www.gnu.org/software/gdb/documentation/>."));
1395 fprintf_filtered (stream, "\n\n");
1396 fprintf_filtered (stream, _("For help, type \"help\".\n"));
1397 fprintf_filtered (stream,
1398 _("Type \"apropos word\" to search for commands \
1399 related to \"word\"."));
1400 }
1401
1402 /* Print the details of GDB build-time configuration. */
1403 void
1404 print_gdb_configuration (struct ui_file *stream)
1405 {
1406 fprintf_filtered (stream, _("\
1407 This GDB was configured as follows:\n\
1408 configure --host=%s --target=%s\n\
1409 "), host_name, target_name);
1410 fprintf_filtered (stream, _("\
1411 --with-auto-load-dir=%s\n\
1412 --with-auto-load-safe-path=%s\n\
1413 "), AUTO_LOAD_DIR, AUTO_LOAD_SAFE_PATH);
1414 #if HAVE_LIBEXPAT
1415 fprintf_filtered (stream, _("\
1416 --with-expat\n\
1417 "));
1418 #else
1419 fprintf_filtered (stream, _("\
1420 --without-expat\n\
1421 "));
1422 #endif
1423 if (GDB_DATADIR[0])
1424 fprintf_filtered (stream, _("\
1425 --with-gdb-datadir=%s%s\n\
1426 "), GDB_DATADIR, GDB_DATADIR_RELOCATABLE ? " (relocatable)" : "");
1427 #ifdef ICONV_BIN
1428 fprintf_filtered (stream, _("\
1429 --with-iconv-bin=%s%s\n\
1430 "), ICONV_BIN, ICONV_BIN_RELOCATABLE ? " (relocatable)" : "");
1431 #endif
1432 if (JIT_READER_DIR[0])
1433 fprintf_filtered (stream, _("\
1434 --with-jit-reader-dir=%s%s\n\
1435 "), JIT_READER_DIR, JIT_READER_DIR_RELOCATABLE ? " (relocatable)" : "");
1436 #if HAVE_LIBUNWIND_IA64_H
1437 fprintf_filtered (stream, _("\
1438 --with-libunwind-ia64\n\
1439 "));
1440 #else
1441 fprintf_filtered (stream, _("\
1442 --without-libunwind-ia64\n\
1443 "));
1444 #endif
1445 #if HAVE_LIBLZMA
1446 fprintf_filtered (stream, _("\
1447 --with-lzma\n\
1448 "));
1449 #else
1450 fprintf_filtered (stream, _("\
1451 --without-lzma\n\
1452 "));
1453 #endif
1454 #if HAVE_LIBBABELTRACE
1455 fprintf_filtered (stream, _("\
1456 --with-babeltrace\n\
1457 "));
1458 #else
1459 fprintf_filtered (stream, _("\
1460 --without-babeltrace\n\
1461 "));
1462 #endif
1463 #if HAVE_LIBIPT
1464 fprintf_filtered (stream, _("\
1465 --with-intel-pt\n\
1466 "));
1467 #else
1468 fprintf_filtered (stream, _("\
1469 --without-intel-pt\n\
1470 "));
1471 #endif
1472 #if HAVE_LIBMCHECK
1473 fprintf_filtered (stream, _("\
1474 --enable-libmcheck\n\
1475 "));
1476 #else
1477 fprintf_filtered (stream, _("\
1478 --disable-libmcheck\n\
1479 "));
1480 #endif
1481 #if HAVE_LIBMPFR
1482 fprintf_filtered (stream, _("\
1483 --with-mpfr\n\
1484 "));
1485 #else
1486 fprintf_filtered (stream, _("\
1487 --without-mpfr\n\
1488 "));
1489 #endif
1490 #ifdef WITH_PYTHON_PATH
1491 fprintf_filtered (stream, _("\
1492 --with-python=%s%s\n\
1493 "), WITH_PYTHON_PATH, PYTHON_PATH_RELOCATABLE ? " (relocatable)" : "");
1494 #else
1495 fprintf_filtered (stream, _("\
1496 --without-python\n\
1497 "));
1498 #endif
1499 #if HAVE_GUILE
1500 fprintf_filtered (stream, _("\
1501 --with-guile\n\
1502 "));
1503 #else
1504 fprintf_filtered (stream, _("\
1505 --without-guile\n\
1506 "));
1507 #endif
1508 #if HAVE_SOURCE_HIGHLIGHT
1509 fprintf_filtered (stream, _("\
1510 --enable-source-highlight\n\
1511 "));
1512 #else
1513 fprintf_filtered (stream, _("\
1514 --disable-source-highlight\n\
1515 "));
1516 #endif
1517 #ifdef RELOC_SRCDIR
1518 fprintf_filtered (stream, _("\
1519 --with-relocated-sources=%s\n\
1520 "), RELOC_SRCDIR);
1521 #endif
1522 if (DEBUGDIR[0])
1523 fprintf_filtered (stream, _("\
1524 --with-separate-debug-dir=%s%s\n\
1525 "), DEBUGDIR, DEBUGDIR_RELOCATABLE ? " (relocatable)" : "");
1526 if (TARGET_SYSTEM_ROOT[0])
1527 fprintf_filtered (stream, _("\
1528 --with-sysroot=%s%s\n\
1529 "), TARGET_SYSTEM_ROOT, TARGET_SYSTEM_ROOT_RELOCATABLE ? " (relocatable)" : "");
1530 if (SYSTEM_GDBINIT[0])
1531 fprintf_filtered (stream, _("\
1532 --with-system-gdbinit=%s%s\n\
1533 "), SYSTEM_GDBINIT, SYSTEM_GDBINIT_RELOCATABLE ? " (relocatable)" : "");
1534 /* We assume "relocatable" will be printed at least once, thus we always
1535 print this text. It's a reasonably safe assumption for now. */
1536 fprintf_filtered (stream, _("\n\
1537 (\"Relocatable\" means the directory can be moved with the GDB installation\n\
1538 tree, and GDB will still find it.)\n\
1539 "));
1540 }
1541 \f
1542
1543 /* The current top level prompt, settable with "set prompt", and/or
1544 with the python `gdb.prompt_hook' hook. */
1545 static char *top_prompt;
1546
1547 /* Access method for the GDB prompt string. */
1548
1549 char *
1550 get_prompt (void)
1551 {
1552 return top_prompt;
1553 }
1554
1555 /* Set method for the GDB prompt string. */
1556
1557 void
1558 set_prompt (const char *s)
1559 {
1560 char *p = xstrdup (s);
1561
1562 xfree (top_prompt);
1563 top_prompt = p;
1564 }
1565 \f
1566
1567 struct qt_args
1568 {
1569 int from_tty;
1570 };
1571
1572 /* Callback for iterate_over_inferiors. Kills or detaches the given
1573 inferior, depending on how we originally gained control of it. */
1574
1575 static int
1576 kill_or_detach (struct inferior *inf, void *args)
1577 {
1578 struct qt_args *qt = (struct qt_args *) args;
1579
1580 if (inf->pid == 0)
1581 return 0;
1582
1583 thread_info *thread = any_thread_of_inferior (inf);
1584 if (thread != NULL)
1585 {
1586 switch_to_thread (thread);
1587
1588 /* Leave core files alone. */
1589 if (target_has_execution)
1590 {
1591 if (inf->attach_flag)
1592 target_detach (inf, qt->from_tty);
1593 else
1594 target_kill ();
1595 }
1596 }
1597
1598 return 0;
1599 }
1600
1601 /* Callback for iterate_over_inferiors. Prints info about what GDB
1602 will do to each inferior on a "quit". ARG points to a struct
1603 ui_out where output is to be collected. */
1604
1605 static int
1606 print_inferior_quit_action (struct inferior *inf, void *arg)
1607 {
1608 struct ui_file *stb = (struct ui_file *) arg;
1609
1610 if (inf->pid == 0)
1611 return 0;
1612
1613 if (inf->attach_flag)
1614 fprintf_filtered (stb,
1615 _("\tInferior %d [%s] will be detached.\n"), inf->num,
1616 target_pid_to_str (ptid_t (inf->pid)).c_str ());
1617 else
1618 fprintf_filtered (stb,
1619 _("\tInferior %d [%s] will be killed.\n"), inf->num,
1620 target_pid_to_str (ptid_t (inf->pid)).c_str ());
1621
1622 return 0;
1623 }
1624
1625 /* If necessary, make the user confirm that we should quit. Return
1626 non-zero if we should quit, zero if we shouldn't. */
1627
1628 int
1629 quit_confirm (void)
1630 {
1631 /* Don't even ask if we're only debugging a core file inferior. */
1632 if (!have_live_inferiors ())
1633 return 1;
1634
1635 /* Build the query string as a single string. */
1636 string_file stb;
1637
1638 stb.puts (_("A debugging session is active.\n\n"));
1639 iterate_over_inferiors (print_inferior_quit_action, &stb);
1640 stb.puts (_("\nQuit anyway? "));
1641
1642 return query ("%s", stb.c_str ());
1643 }
1644
1645 /* Prepare to exit GDB cleanly by undoing any changes made to the
1646 terminal so that we leave the terminal in the state we acquired it. */
1647
1648 static void
1649 undo_terminal_modifications_before_exit (void)
1650 {
1651 struct ui *saved_top_level = current_ui;
1652
1653 target_terminal::ours ();
1654
1655 current_ui = main_ui;
1656
1657 #if defined(TUI)
1658 tui_disable ();
1659 #endif
1660 gdb_disable_readline ();
1661
1662 current_ui = saved_top_level;
1663 }
1664
1665
1666 /* Quit without asking for confirmation. */
1667
1668 void
1669 quit_force (int *exit_arg, int from_tty)
1670 {
1671 int exit_code = 0;
1672 struct qt_args qt;
1673
1674 undo_terminal_modifications_before_exit ();
1675
1676 /* An optional expression may be used to cause gdb to terminate with the
1677 value of that expression. */
1678 if (exit_arg)
1679 exit_code = *exit_arg;
1680 else if (return_child_result)
1681 exit_code = return_child_result_value;
1682
1683 qt.from_tty = from_tty;
1684
1685 /* We want to handle any quit errors and exit regardless. */
1686
1687 /* Get out of tfind mode, and kill or detach all inferiors. */
1688 try
1689 {
1690 disconnect_tracing ();
1691 iterate_over_inferiors (kill_or_detach, &qt);
1692 }
1693 catch (const gdb_exception &ex)
1694 {
1695 exception_print (gdb_stderr, ex);
1696 }
1697
1698 /* Give all pushed targets a chance to do minimal cleanup, and pop
1699 them all out. */
1700 try
1701 {
1702 pop_all_targets ();
1703 }
1704 catch (const gdb_exception &ex)
1705 {
1706 exception_print (gdb_stderr, ex);
1707 }
1708
1709 /* Save the history information if it is appropriate to do so. */
1710 try
1711 {
1712 if (write_history_p && history_filename)
1713 {
1714 struct ui *ui;
1715 int save = 0;
1716
1717 /* History is currently shared between all UIs. If there's
1718 any UI with a terminal, save history. */
1719 ALL_UIS (ui)
1720 {
1721 if (input_interactive_p (ui))
1722 {
1723 save = 1;
1724 break;
1725 }
1726 }
1727
1728 if (save)
1729 gdb_safe_append_history ();
1730 }
1731 }
1732 catch (const gdb_exception &ex)
1733 {
1734 exception_print (gdb_stderr, ex);
1735 }
1736
1737 /* Destroy any values currently allocated now instead of leaving it
1738 to global destructors, because that may be too late. For
1739 example, the destructors of xmethod values call into the Python
1740 runtime, which is finalized via a final cleanup. */
1741 finalize_values ();
1742
1743 /* Do any final cleanups before exiting. */
1744 try
1745 {
1746 do_final_cleanups ();
1747 }
1748 catch (const gdb_exception &ex)
1749 {
1750 exception_print (gdb_stderr, ex);
1751 }
1752
1753 exit (exit_code);
1754 }
1755
1756 /* The value of the "interactive-mode" setting. */
1757 static enum auto_boolean interactive_mode = AUTO_BOOLEAN_AUTO;
1758
1759 /* Implement the "show interactive-mode" option. */
1760
1761 static void
1762 show_interactive_mode (struct ui_file *file, int from_tty,
1763 struct cmd_list_element *c,
1764 const char *value)
1765 {
1766 if (interactive_mode == AUTO_BOOLEAN_AUTO)
1767 fprintf_filtered (file, "Debugger's interactive mode "
1768 "is %s (currently %s).\n",
1769 value, input_interactive_p (current_ui) ? "on" : "off");
1770 else
1771 fprintf_filtered (file, "Debugger's interactive mode is %s.\n", value);
1772 }
1773
1774 /* Returns whether GDB is running on an interactive terminal. */
1775
1776 int
1777 input_interactive_p (struct ui *ui)
1778 {
1779 if (batch_flag)
1780 return 0;
1781
1782 if (interactive_mode != AUTO_BOOLEAN_AUTO)
1783 return interactive_mode == AUTO_BOOLEAN_TRUE;
1784
1785 return ui->input_interactive_p;
1786 }
1787 \f
1788 static void
1789 dont_repeat_command (const char *ignored, int from_tty)
1790 {
1791 /* Can't call dont_repeat here because we're not necessarily reading
1792 from stdin. */
1793 *saved_command_line = 0;
1794 }
1795 \f
1796 /* Functions to manipulate command line editing control variables. */
1797
1798 /* Number of commands to print in each call to show_commands. */
1799 #define Hist_print 10
1800 void
1801 show_commands (const char *args, int from_tty)
1802 {
1803 /* Index for history commands. Relative to history_base. */
1804 int offset;
1805
1806 /* Number of the history entry which we are planning to display next.
1807 Relative to history_base. */
1808 static int num = 0;
1809
1810 /* Print out some of the commands from the command history. */
1811
1812 if (args)
1813 {
1814 if (args[0] == '+' && args[1] == '\0')
1815 /* "info editing +" should print from the stored position. */
1816 ;
1817 else
1818 /* "info editing <exp>" should print around command number <exp>. */
1819 num = (parse_and_eval_long (args) - history_base) - Hist_print / 2;
1820 }
1821 /* "show commands" means print the last Hist_print commands. */
1822 else
1823 {
1824 num = history_length - Hist_print;
1825 }
1826
1827 if (num < 0)
1828 num = 0;
1829
1830 /* If there are at least Hist_print commands, we want to display the last
1831 Hist_print rather than, say, the last 6. */
1832 if (history_length - num < Hist_print)
1833 {
1834 num = history_length - Hist_print;
1835 if (num < 0)
1836 num = 0;
1837 }
1838
1839 for (offset = num;
1840 offset < num + Hist_print && offset < history_length;
1841 offset++)
1842 {
1843 printf_filtered ("%5d %s\n", history_base + offset,
1844 (history_get (history_base + offset))->line);
1845 }
1846
1847 /* The next command we want to display is the next one that we haven't
1848 displayed yet. */
1849 num += Hist_print;
1850
1851 /* If the user repeats this command with return, it should do what
1852 "show commands +" does. This is unnecessary if arg is null,
1853 because "show commands +" is not useful after "show commands". */
1854 if (from_tty && args)
1855 set_repeat_arguments ("+");
1856 }
1857
1858 /* Update the size of our command history file to HISTORY_SIZE.
1859
1860 A HISTORY_SIZE of -1 stands for unlimited. */
1861
1862 static void
1863 set_readline_history_size (int history_size)
1864 {
1865 gdb_assert (history_size >= -1);
1866
1867 if (history_size == -1)
1868 unstifle_history ();
1869 else
1870 stifle_history (history_size);
1871 }
1872
1873 /* Called by do_setshow_command. */
1874 static void
1875 set_history_size_command (const char *args,
1876 int from_tty, struct cmd_list_element *c)
1877 {
1878 set_readline_history_size (history_size_setshow_var);
1879 }
1880
1881 void
1882 set_history (const char *args, int from_tty)
1883 {
1884 printf_unfiltered (_("\"set history\" must be followed "
1885 "by the name of a history subcommand.\n"));
1886 help_list (sethistlist, "set history ", all_commands, gdb_stdout);
1887 }
1888
1889 void
1890 show_history (const char *args, int from_tty)
1891 {
1892 cmd_show_list (showhistlist, from_tty, "");
1893 }
1894
1895 int info_verbose = 0; /* Default verbose msgs off. */
1896
1897 /* Called by do_set_command. An elaborate joke. */
1898 void
1899 set_verbose (const char *args, int from_tty, struct cmd_list_element *c)
1900 {
1901 const char *cmdname = "verbose";
1902 struct cmd_list_element *showcmd;
1903
1904 showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1);
1905 gdb_assert (showcmd != NULL && showcmd != CMD_LIST_AMBIGUOUS);
1906
1907 if (c->doc && c->doc_allocated)
1908 xfree ((char *) c->doc);
1909 if (showcmd->doc && showcmd->doc_allocated)
1910 xfree ((char *) showcmd->doc);
1911 if (info_verbose)
1912 {
1913 c->doc = _("Set verbose printing of informational messages.");
1914 showcmd->doc = _("Show verbose printing of informational messages.");
1915 }
1916 else
1917 {
1918 c->doc = _("Set verbosity.");
1919 showcmd->doc = _("Show verbosity.");
1920 }
1921 c->doc_allocated = 0;
1922 showcmd->doc_allocated = 0;
1923 }
1924
1925 /* Init the history buffer. Note that we are called after the init file(s)
1926 have been read so that the user can change the history file via his
1927 .gdbinit file (for instance). The GDBHISTFILE environment variable
1928 overrides all of this. */
1929
1930 void
1931 init_history (void)
1932 {
1933 const char *tmpenv;
1934
1935 tmpenv = getenv ("GDBHISTSIZE");
1936 if (tmpenv)
1937 {
1938 long var;
1939 int saved_errno;
1940 char *endptr;
1941
1942 tmpenv = skip_spaces (tmpenv);
1943 errno = 0;
1944 var = strtol (tmpenv, &endptr, 10);
1945 saved_errno = errno;
1946 endptr = skip_spaces (endptr);
1947
1948 /* If GDBHISTSIZE is non-numeric then ignore it. If GDBHISTSIZE is the
1949 empty string, a negative number or a huge positive number (larger than
1950 INT_MAX) then set the history size to unlimited. Otherwise set our
1951 history size to the number we have read. This behavior is consistent
1952 with how bash handles HISTSIZE. */
1953 if (*endptr != '\0')
1954 ;
1955 else if (*tmpenv == '\0'
1956 || var < 0
1957 || var > INT_MAX
1958 /* On targets where INT_MAX == LONG_MAX, we have to look at
1959 errno after calling strtol to distinguish between a value that
1960 is exactly INT_MAX and an overflowing value that was clamped
1961 to INT_MAX. */
1962 || (var == INT_MAX && saved_errno == ERANGE))
1963 history_size_setshow_var = -1;
1964 else
1965 history_size_setshow_var = var;
1966 }
1967
1968 /* If neither the init file nor GDBHISTSIZE has set a size yet, pick the
1969 default. */
1970 if (history_size_setshow_var == -2)
1971 history_size_setshow_var = 256;
1972
1973 set_readline_history_size (history_size_setshow_var);
1974
1975 tmpenv = getenv ("GDBHISTFILE");
1976 if (tmpenv)
1977 history_filename = xstrdup (tmpenv);
1978 else if (!history_filename)
1979 {
1980 /* We include the current directory so that if the user changes
1981 directories the file written will be the same as the one
1982 that was read. */
1983 #ifdef __MSDOS__
1984 /* No leading dots in file names are allowed on MSDOS. */
1985 history_filename = concat (current_directory, "/_gdb_history",
1986 (char *)NULL);
1987 #else
1988 history_filename = concat (current_directory, "/.gdb_history",
1989 (char *)NULL);
1990 #endif
1991 }
1992 read_history (history_filename);
1993 }
1994
1995 static void
1996 show_prompt (struct ui_file *file, int from_tty,
1997 struct cmd_list_element *c, const char *value)
1998 {
1999 fprintf_filtered (file, _("Gdb's prompt is \"%s\".\n"), value);
2000 }
2001
2002 /* "set editing" command. */
2003
2004 static void
2005 set_editing (const char *args, int from_tty, struct cmd_list_element *c)
2006 {
2007 change_line_handler (set_editing_cmd_var);
2008 /* Update the control variable so that MI's =cmd-param-changed event
2009 shows the correct value. */
2010 set_editing_cmd_var = current_ui->command_editing;
2011 }
2012
2013 static void
2014 show_editing (struct ui_file *file, int from_tty,
2015 struct cmd_list_element *c, const char *value)
2016 {
2017 fprintf_filtered (file, _("Editing of command lines as "
2018 "they are typed is %s.\n"),
2019 current_ui->command_editing ? _("on") : _("off"));
2020 }
2021
2022 static void
2023 show_annotation_level (struct ui_file *file, int from_tty,
2024 struct cmd_list_element *c, const char *value)
2025 {
2026 fprintf_filtered (file, _("Annotation_level is %s.\n"), value);
2027 }
2028
2029 static void
2030 show_exec_done_display_p (struct ui_file *file, int from_tty,
2031 struct cmd_list_element *c, const char *value)
2032 {
2033 fprintf_filtered (file, _("Notification of completion for "
2034 "asynchronous execution commands is %s.\n"),
2035 value);
2036 }
2037
2038 /* New values of the "data-directory" parameter are staged here. */
2039 static char *staged_gdb_datadir;
2040
2041 /* "set" command for the gdb_datadir configuration variable. */
2042
2043 static void
2044 set_gdb_datadir (const char *args, int from_tty, struct cmd_list_element *c)
2045 {
2046 set_gdb_data_directory (staged_gdb_datadir);
2047 gdb::observers::gdb_datadir_changed.notify ();
2048 }
2049
2050 /* "show" command for the gdb_datadir configuration variable. */
2051
2052 static void
2053 show_gdb_datadir (struct ui_file *file, int from_tty,
2054 struct cmd_list_element *c, const char *value)
2055 {
2056 fprintf_filtered (file, _("GDB's data directory is \"%s\".\n"),
2057 gdb_datadir);
2058 }
2059
2060 static void
2061 set_history_filename (const char *args,
2062 int from_tty, struct cmd_list_element *c)
2063 {
2064 /* We include the current directory so that if the user changes
2065 directories the file written will be the same as the one
2066 that was read. */
2067 if (!IS_ABSOLUTE_PATH (history_filename))
2068 history_filename = reconcat (history_filename, current_directory, "/",
2069 history_filename, (char *) NULL);
2070 }
2071
2072 static void
2073 init_gdb_version_vars (void)
2074 {
2075 struct internalvar *major_version_var = create_internalvar ("_gdb_major");
2076 struct internalvar *minor_version_var = create_internalvar ("_gdb_minor");
2077 int vmajor = 0, vminor = 0, vrevision = 0;
2078 sscanf (version, "%d.%d.%d", &vmajor, &vminor, &vrevision);
2079 set_internalvar_integer (major_version_var, vmajor);
2080 set_internalvar_integer (minor_version_var, vminor + (vrevision > 0));
2081 }
2082
2083 static void
2084 init_main (void)
2085 {
2086 struct cmd_list_element *c;
2087
2088 /* Initialize the prompt to a simple "(gdb) " prompt or to whatever
2089 the DEFAULT_PROMPT is. */
2090 set_prompt (DEFAULT_PROMPT);
2091
2092 /* Set the important stuff up for command editing. */
2093 command_editing_p = 1;
2094 history_expansion_p = 0;
2095 write_history_p = 0;
2096
2097 /* Setup important stuff for command line editing. */
2098 rl_completion_word_break_hook = gdb_completion_word_break_characters;
2099 rl_attempted_completion_function = gdb_rl_attempted_completion_function;
2100 set_rl_completer_word_break_characters (default_word_break_characters ());
2101 rl_completer_quote_characters = get_gdb_completer_quote_characters ();
2102 rl_completion_display_matches_hook = cli_display_match_list;
2103 rl_readline_name = "gdb";
2104 rl_terminal_name = getenv ("TERM");
2105
2106 /* The name for this defun comes from Bash, where it originated.
2107 15 is Control-o, the same binding this function has in Bash. */
2108 rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15);
2109
2110 add_setshow_string_cmd ("prompt", class_support,
2111 &top_prompt,
2112 _("Set gdb's prompt"),
2113 _("Show gdb's prompt"),
2114 NULL, NULL,
2115 show_prompt,
2116 &setlist, &showlist);
2117
2118 add_com ("dont-repeat", class_support, dont_repeat_command, _("\
2119 Don't repeat this command.\nPrimarily \
2120 used inside of user-defined commands that should not be repeated when\n\
2121 hitting return."));
2122
2123 add_setshow_boolean_cmd ("editing", class_support,
2124 &set_editing_cmd_var, _("\
2125 Set editing of command lines as they are typed."), _("\
2126 Show editing of command lines as they are typed."), _("\
2127 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
2128 Without an argument, command line editing is enabled. To edit, use\n\
2129 EMACS-like or VI-like commands like control-P or ESC."),
2130 set_editing,
2131 show_editing,
2132 &setlist, &showlist);
2133
2134 add_setshow_boolean_cmd ("save", no_class, &write_history_p, _("\
2135 Set saving of the history record on exit."), _("\
2136 Show saving of the history record on exit."), _("\
2137 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
2138 Without an argument, saving is enabled."),
2139 NULL,
2140 show_write_history_p,
2141 &sethistlist, &showhistlist);
2142
2143 add_setshow_zuinteger_unlimited_cmd ("size", no_class,
2144 &history_size_setshow_var, _("\
2145 Set the size of the command history,"), _("\
2146 Show the size of the command history,"), _("\
2147 ie. the number of previous commands to keep a record of.\n\
2148 If set to \"unlimited\", the number of commands kept in the history\n\
2149 list is unlimited. This defaults to the value of the environment\n\
2150 variable \"GDBHISTSIZE\", or to 256 if this variable is not set."),
2151 set_history_size_command,
2152 show_history_size,
2153 &sethistlist, &showhistlist);
2154
2155 add_setshow_zuinteger_unlimited_cmd ("remove-duplicates", no_class,
2156 &history_remove_duplicates, _("\
2157 Set how far back in history to look for and remove duplicate entries."), _("\
2158 Show how far back in history to look for and remove duplicate entries."), _("\
2159 If set to a nonzero value N, GDB will look back at the last N history entries\n\
2160 and remove the first history entry that is a duplicate of the most recent\n\
2161 entry, each time a new history entry is added.\n\
2162 If set to \"unlimited\", this lookbehind is unbounded.\n\
2163 Only history entries added during this session are considered for removal.\n\
2164 If set to 0, removal of duplicate history entries is disabled.\n\
2165 By default this option is set to 0."),
2166 NULL,
2167 show_history_remove_duplicates,
2168 &sethistlist, &showhistlist);
2169
2170 add_setshow_filename_cmd ("filename", no_class, &history_filename, _("\
2171 Set the filename in which to record the command history"), _("\
2172 Show the filename in which to record the command history"), _("\
2173 (the list of previous commands of which a record is kept)."),
2174 set_history_filename,
2175 show_history_filename,
2176 &sethistlist, &showhistlist);
2177
2178 add_setshow_boolean_cmd ("confirm", class_support, &confirm, _("\
2179 Set whether to confirm potentially dangerous operations."), _("\
2180 Show whether to confirm potentially dangerous operations."), NULL,
2181 NULL,
2182 show_confirm,
2183 &setlist, &showlist);
2184
2185 add_setshow_zinteger_cmd ("annotate", class_obscure, &annotation_level, _("\
2186 Set annotation_level."), _("\
2187 Show annotation_level."), _("\
2188 0 == normal; 1 == fullname (for use when running under emacs)\n\
2189 2 == output annotated suitably for use by programs that control GDB."),
2190 NULL,
2191 show_annotation_level,
2192 &setlist, &showlist);
2193
2194 add_setshow_boolean_cmd ("exec-done-display", class_support,
2195 &exec_done_display_p, _("\
2196 Set notification of completion for asynchronous execution commands."), _("\
2197 Show notification of completion for asynchronous execution commands."), _("\
2198 Use \"on\" to enable the notification, and \"off\" to disable it."),
2199 NULL,
2200 show_exec_done_display_p,
2201 &setlist, &showlist);
2202
2203 add_setshow_filename_cmd ("data-directory", class_maintenance,
2204 &staged_gdb_datadir, _("Set GDB's data directory."),
2205 _("Show GDB's data directory."),
2206 _("\
2207 When set, GDB uses the specified path to search for data files."),
2208 set_gdb_datadir, show_gdb_datadir,
2209 &setlist,
2210 &showlist);
2211
2212 add_setshow_auto_boolean_cmd ("interactive-mode", class_support,
2213 &interactive_mode, _("\
2214 Set whether GDB's standard input is a terminal."), _("\
2215 Show whether GDB's standard input is a terminal."), _("\
2216 If on, GDB assumes that standard input is a terminal. In practice, it\n\
2217 means that GDB should wait for the user to answer queries associated to\n\
2218 commands entered at the command prompt. If off, GDB assumes that standard\n\
2219 input is not a terminal, and uses the default answer to all queries.\n\
2220 If auto (the default), determine which mode to use based on the standard\n\
2221 input settings."),
2222 NULL,
2223 show_interactive_mode,
2224 &setlist, &showlist);
2225
2226 c = add_cmd ("new-ui", class_support, new_ui_command, _("\
2227 Create a new UI. It takes two arguments:\n\
2228 The first argument is the name of the interpreter to run.\n\
2229 The second argument is the terminal the UI runs on."), &cmdlist);
2230 set_cmd_completer (c, interpreter_completer);
2231 }
2232
2233 void
2234 gdb_init (char *argv0)
2235 {
2236 saved_command_line = xstrdup ("");
2237 previous_saved_command_line = xstrdup ("");
2238
2239 if (pre_init_ui_hook)
2240 pre_init_ui_hook ();
2241
2242 /* Run the init function of each source file. */
2243
2244 #ifdef __MSDOS__
2245 /* Make sure we return to the original directory upon exit, come
2246 what may, since the OS doesn't do that for us. */
2247 make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory));
2248 #endif
2249
2250 init_cmd_lists (); /* This needs to be done first. */
2251 initialize_targets (); /* Setup target_terminal macros for utils.c. */
2252 initialize_utils (); /* Make errors and warnings possible. */
2253
2254 init_page_info ();
2255
2256 /* Here is where we call all the _initialize_foo routines. */
2257 initialize_all_files ();
2258
2259 /* This creates the current_program_space. Do this after all the
2260 _initialize_foo routines have had a chance to install their
2261 per-sspace data keys. Also do this before
2262 initialize_current_architecture is called, because it accesses
2263 exec_bfd of the current program space. */
2264 initialize_progspace ();
2265 initialize_inferiors ();
2266 initialize_current_architecture ();
2267 init_cli_cmds();
2268 init_main (); /* But that omits this file! Do it now. */
2269
2270 initialize_stdin_serial ();
2271
2272 /* Take a snapshot of our tty state before readline/ncurses have had a chance
2273 to alter it. */
2274 set_initial_gdb_ttystate ();
2275
2276 async_init_signals ();
2277
2278 /* We need a default language for parsing expressions, so simple
2279 things like "set width 0" won't fail if no language is explicitly
2280 set in a config file or implicitly set by reading an executable
2281 during startup. */
2282 set_language (language_c);
2283 expected_language = current_language; /* Don't warn about the change. */
2284
2285 /* Python initialization, for example, can require various commands to be
2286 installed. For example "info pretty-printer" needs the "info"
2287 prefix to be installed. Keep things simple and just do final
2288 script initialization here. */
2289 finish_ext_lang_initialization ();
2290
2291 /* Create $_gdb_major and $_gdb_minor convenience variables. */
2292 init_gdb_version_vars ();
2293 }
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