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