Commit | Line | Data |
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2611b1a5 | 1 | /* GDB hooks for TUI. |
f33c6cbf AC |
2 | |
3 | Copyright 2001, 2002 Free Software Foundation, Inc. | |
2611b1a5 SC |
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 2 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, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
f33c6cbf AC |
22 | /* FIXME: cagney/2002-02-28: The GDB coding standard indicates that |
23 | "defs.h" should be included first. Unfortunatly some systems | |
24 | (currently Debian GNU/Linux) include the <stdbool.h> via <curses.h> | |
25 | and they clash with "bfd.h"'s definiton of true/false. The correct | |
26 | fix is to remove true/false from "bfd.h", however, until that | |
27 | happens, hack around it by including "config.h" and <curses.h> | |
28 | first. */ | |
29 | ||
4e8f7a8b DJ |
30 | #include "config.h" |
31 | #ifdef HAVE_NCURSES_H | |
32 | #include <ncurses.h> | |
33 | #else | |
34 | #ifdef HAVE_CURSES_H | |
35 | #include <curses.h> | |
36 | #endif | |
37 | #endif | |
38 | ||
2611b1a5 SC |
39 | #include "defs.h" |
40 | #include "symtab.h" | |
41 | #include "inferior.h" | |
42 | #include "command.h" | |
43 | #include "bfd.h" | |
44 | #include "symfile.h" | |
45 | #include "objfiles.h" | |
46 | #include "target.h" | |
47 | #include "gdbcore.h" | |
48 | #include "event-loop.h" | |
2b68e2c5 | 49 | #include "event-top.h" |
2611b1a5 SC |
50 | #include "frame.h" |
51 | #include "breakpoint.h" | |
52 | #include "gdb-events.h" | |
2b68e2c5 SC |
53 | #include "ui-out.h" |
54 | #include "top.h" | |
55 | #include <readline/readline.h> | |
2611b1a5 SC |
56 | #include <unistd.h> |
57 | #include <fcntl.h> | |
58 | ||
59 | #include "tui.h" | |
60 | #include "tuiData.h" | |
61 | #include "tuiLayout.h" | |
62 | #include "tuiIO.h" | |
63 | #include "tuiRegs.h" | |
64 | #include "tuiWin.h" | |
65 | #include "tuiStack.h" | |
66 | #include "tuiDataWin.h" | |
67 | #include "tuiSourceWin.h" | |
68 | ||
69 | int tui_target_has_run = 0; | |
70 | ||
71 | static void (* tui_target_new_objfile_chain) (struct objfile*); | |
2b68e2c5 SC |
72 | static void tui_event_loop (void); |
73 | static void tui_command_loop (void); | |
2611b1a5 SC |
74 | |
75 | static void | |
76 | tui_new_objfile_hook (struct objfile* objfile) | |
77 | { | |
78 | if (tui_active) | |
1f393769 | 79 | tui_display_main (); |
2611b1a5 SC |
80 | |
81 | if (tui_target_new_objfile_chain) | |
82 | tui_target_new_objfile_chain (objfile); | |
83 | } | |
84 | ||
85 | static int | |
86 | tui_query_hook (const char * msg, va_list argp) | |
87 | { | |
88 | int retval; | |
89 | int ans2; | |
90 | int answer; | |
91 | ||
92 | /* Automatically answer "yes" if input is not from a terminal. */ | |
93 | if (!input_from_terminal_p ()) | |
94 | return 1; | |
95 | ||
96 | echo (); | |
97 | while (1) | |
98 | { | |
99 | wrap_here (""); /* Flush any buffered output */ | |
100 | gdb_flush (gdb_stdout); | |
101 | ||
102 | vfprintf_filtered (gdb_stdout, msg, argp); | |
103 | printf_filtered ("(y or n) "); | |
104 | ||
105 | wrap_here (""); | |
106 | gdb_flush (gdb_stdout); | |
107 | ||
108 | answer = tui_getc (stdin); | |
109 | clearerr (stdin); /* in case of C-d */ | |
110 | if (answer == EOF) /* C-d */ | |
111 | { | |
112 | retval = 1; | |
113 | break; | |
114 | } | |
115 | /* Eat rest of input line, to EOF or newline */ | |
116 | if (answer != '\n') | |
117 | do | |
118 | { | |
119 | ans2 = tui_getc (stdin); | |
120 | clearerr (stdin); | |
121 | } | |
122 | while (ans2 != EOF && ans2 != '\n' && ans2 != '\r'); | |
123 | ||
124 | if (answer >= 'a') | |
125 | answer -= 040; | |
126 | if (answer == 'Y') | |
127 | { | |
128 | retval = 1; | |
129 | break; | |
130 | } | |
131 | if (answer == 'N') | |
132 | { | |
133 | retval = 0; | |
134 | break; | |
135 | } | |
136 | printf_filtered ("Please answer y or n.\n"); | |
137 | } | |
138 | noecho (); | |
139 | return retval; | |
140 | } | |
141 | ||
142 | /* Prevent recursion of registers_changed_hook(). */ | |
143 | static int tui_refreshing_registers = 0; | |
144 | ||
145 | static void | |
146 | tui_registers_changed_hook (void) | |
147 | { | |
148 | struct frame_info *fi; | |
149 | ||
6e7f8b9c | 150 | fi = deprecated_selected_frame; |
2611b1a5 SC |
151 | if (fi && tui_refreshing_registers == 0) |
152 | { | |
153 | tui_refreshing_registers = 1; | |
154 | #if 0 | |
155 | tuiCheckDataValues (fi); | |
156 | #endif | |
157 | tui_refreshing_registers = 0; | |
158 | } | |
159 | } | |
160 | ||
161 | static void | |
162 | tui_register_changed_hook (int regno) | |
163 | { | |
164 | struct frame_info *fi; | |
165 | ||
6e7f8b9c | 166 | fi = deprecated_selected_frame; |
2611b1a5 SC |
167 | if (fi && tui_refreshing_registers == 0) |
168 | { | |
169 | tui_refreshing_registers = 1; | |
170 | tuiCheckDataValues (fi); | |
171 | tui_refreshing_registers = 0; | |
172 | } | |
173 | } | |
174 | ||
2611b1a5 SC |
175 | /* Breakpoint creation hook. |
176 | Update the screen to show the new breakpoint. */ | |
177 | static void | |
178 | tui_event_create_breakpoint (int number) | |
179 | { | |
00b2bad4 | 180 | tui_update_all_breakpoint_info (); |
2611b1a5 SC |
181 | } |
182 | ||
183 | /* Breakpoint deletion hook. | |
184 | Refresh the screen to update the breakpoint marks. */ | |
185 | static void | |
186 | tui_event_delete_breakpoint (int number) | |
187 | { | |
00b2bad4 | 188 | tui_update_all_breakpoint_info (); |
2611b1a5 SC |
189 | } |
190 | ||
191 | static void | |
192 | tui_event_modify_breakpoint (int number) | |
193 | { | |
00b2bad4 | 194 | tui_update_all_breakpoint_info (); |
2611b1a5 SC |
195 | } |
196 | ||
197 | static void | |
198 | tui_event_default (int number) | |
199 | { | |
200 | ; | |
201 | } | |
202 | ||
203 | static struct gdb_events *tui_old_event_hooks; | |
204 | ||
205 | static struct gdb_events tui_event_hooks = | |
206 | { | |
207 | tui_event_create_breakpoint, | |
208 | tui_event_delete_breakpoint, | |
209 | tui_event_modify_breakpoint, | |
210 | tui_event_default, | |
211 | tui_event_default, | |
212 | tui_event_default | |
213 | }; | |
214 | ||
215 | /* Called when going to wait for the target. | |
216 | Leave curses mode and setup program mode. */ | |
217 | static ptid_t | |
218 | tui_target_wait_hook (ptid_t pid, struct target_waitstatus *status) | |
219 | { | |
220 | ptid_t res; | |
221 | ||
222 | /* Leave tui mode (optional). */ | |
223 | #if 0 | |
224 | if (tui_active) | |
225 | { | |
226 | target_terminal_ours (); | |
227 | endwin (); | |
228 | target_terminal_inferior (); | |
229 | } | |
230 | #endif | |
231 | tui_target_has_run = 1; | |
232 | res = target_wait (pid, status); | |
233 | ||
234 | if (tui_active) | |
235 | { | |
236 | /* TODO: need to refresh (optional). */ | |
237 | } | |
238 | return res; | |
239 | } | |
240 | ||
241 | /* The selected frame has changed. This is happens after a target | |
242 | stop or when the user explicitly changes the frame (up/down/thread/...). */ | |
243 | static void | |
244 | tui_selected_frame_level_changed_hook (int level) | |
245 | { | |
246 | struct frame_info *fi; | |
247 | ||
6e7f8b9c | 248 | fi = deprecated_selected_frame; |
2611b1a5 SC |
249 | /* Ensure that symbols for this frame are read in. Also, determine the |
250 | source language of this frame, and switch to it if desired. */ | |
251 | if (fi) | |
252 | { | |
253 | struct symtab *s; | |
254 | ||
255 | s = find_pc_symtab (fi->pc); | |
256 | /* elz: this if here fixes the problem with the pc not being displayed | |
257 | in the tui asm layout, with no debug symbols. The value of s | |
258 | would be 0 here, and select_source_symtab would abort the | |
259 | command by calling the 'error' function */ | |
260 | if (s) | |
90949d06 SC |
261 | select_source_symtab (s); |
262 | ||
263 | /* Display the frame position (even if there is no symbols). */ | |
264 | tuiShowFrameInfo (fi); | |
2611b1a5 SC |
265 | |
266 | /* Refresh the register window if it's visible. */ | |
267 | if (tui_is_window_visible (DATA_WIN)) | |
268 | { | |
269 | tui_refreshing_registers = 1; | |
270 | tuiCheckDataValues (fi); | |
271 | tui_refreshing_registers = 0; | |
272 | } | |
273 | } | |
274 | } | |
275 | ||
276 | /* Called from print_frame_info to list the line we stopped in. */ | |
277 | static void | |
278 | tui_print_frame_info_listing_hook (struct symtab *s, int line, | |
279 | int stopline, int noerror) | |
280 | { | |
281 | select_source_symtab (s); | |
6e7f8b9c | 282 | tuiShowFrameInfo (deprecated_selected_frame); |
2611b1a5 SC |
283 | } |
284 | ||
cda8ab40 SC |
285 | /* Called when the target process died or is detached. |
286 | Update the status line. */ | |
287 | static void | |
288 | tui_detach_hook (void) | |
289 | { | |
290 | tuiShowFrameInfo (0); | |
291 | tui_display_main (); | |
292 | } | |
293 | ||
2611b1a5 SC |
294 | /* Install the TUI specific hooks. */ |
295 | void | |
296 | tui_install_hooks (void) | |
297 | { | |
298 | target_wait_hook = tui_target_wait_hook; | |
299 | selected_frame_level_changed_hook = tui_selected_frame_level_changed_hook; | |
300 | print_frame_info_listing_hook = tui_print_frame_info_listing_hook; | |
301 | ||
302 | query_hook = tui_query_hook; | |
303 | ||
304 | /* Install the event hooks. */ | |
305 | tui_old_event_hooks = set_gdb_event_hooks (&tui_event_hooks); | |
306 | ||
307 | registers_changed_hook = tui_registers_changed_hook; | |
308 | register_changed_hook = tui_register_changed_hook; | |
cda8ab40 | 309 | detach_hook = tui_detach_hook; |
2611b1a5 SC |
310 | } |
311 | ||
312 | /* Remove the TUI specific hooks. */ | |
313 | void | |
314 | tui_remove_hooks (void) | |
315 | { | |
316 | target_wait_hook = 0; | |
317 | selected_frame_level_changed_hook = 0; | |
318 | print_frame_info_listing_hook = 0; | |
319 | query_hook = 0; | |
320 | registers_changed_hook = 0; | |
321 | register_changed_hook = 0; | |
cda8ab40 | 322 | detach_hook = 0; |
2611b1a5 SC |
323 | |
324 | /* Restore the previous event hooks. */ | |
325 | set_gdb_event_hooks (tui_old_event_hooks); | |
326 | } | |
327 | ||
328 | /* Cleanup the tui before exiting. */ | |
329 | static void | |
330 | tui_exit (void) | |
331 | { | |
332 | /* Disable the tui. Curses mode is left leaving the screen | |
333 | in a clean state (see endwin()). */ | |
334 | tui_disable (); | |
335 | } | |
336 | ||
2b68e2c5 SC |
337 | /* Initialize all the necessary variables, start the event loop, |
338 | register readline, and stdin, start the loop. */ | |
339 | static void | |
340 | tui_command_loop (void) | |
341 | { | |
342 | int length; | |
343 | char *a_prompt; | |
344 | char *gdb_prompt = get_prompt (); | |
345 | ||
346 | /* If we are using readline, set things up and display the first | |
347 | prompt, otherwise just print the prompt. */ | |
348 | if (async_command_editing_p) | |
349 | { | |
350 | /* Tell readline what the prompt to display is and what function it | |
351 | will need to call after a whole line is read. This also displays | |
352 | the first prompt. */ | |
353 | length = strlen (PREFIX (0)) + strlen (gdb_prompt) + strlen (SUFFIX (0)) + 1; | |
354 | a_prompt = (char *) xmalloc (length); | |
355 | strcpy (a_prompt, PREFIX (0)); | |
356 | strcat (a_prompt, gdb_prompt); | |
357 | strcat (a_prompt, SUFFIX (0)); | |
358 | rl_callback_handler_install (a_prompt, input_handler); | |
359 | } | |
360 | else | |
361 | display_gdb_prompt (0); | |
362 | ||
363 | /* Now it's time to start the event loop. */ | |
364 | tui_event_loop (); | |
365 | } | |
366 | ||
367 | /* Start up the event loop. This is the entry point to the event loop | |
368 | from the command loop. */ | |
369 | ||
370 | static void | |
371 | tui_event_loop (void) | |
372 | { | |
373 | /* Loop until there is nothing to do. This is the entry point to the | |
374 | event loop engine. gdb_do_one_event, called via catch_errors() | |
375 | will process one event for each invocation. It blocks waits for | |
376 | an event and then processes it. >0 when an event is processed, 0 | |
377 | when catch_errors() caught an error and <0 when there are no | |
378 | longer any event sources registered. */ | |
379 | while (1) | |
380 | { | |
381 | int result = catch_errors (gdb_do_one_event, 0, "", RETURN_MASK_ALL); | |
382 | if (result < 0) | |
383 | break; | |
384 | ||
385 | /* Update gdb output according to TUI mode. Since catch_errors | |
386 | preserves the uiout from changing, this must be done at top | |
387 | level of event loop. */ | |
388 | if (tui_active) | |
389 | uiout = tui_out; | |
390 | else | |
391 | uiout = tui_old_uiout; | |
392 | ||
393 | if (result == 0) | |
394 | { | |
395 | /* FIXME: this should really be a call to a hook that is | |
396 | interface specific, because interfaces can display the | |
397 | prompt in their own way. */ | |
398 | display_gdb_prompt (0); | |
399 | /* This call looks bizarre, but it is required. If the user | |
400 | entered a command that caused an error, | |
401 | after_char_processing_hook won't be called from | |
402 | rl_callback_read_char_wrapper. Using a cleanup there | |
403 | won't work, since we want this function to be called | |
404 | after a new prompt is printed. */ | |
405 | if (after_char_processing_hook) | |
406 | (*after_char_processing_hook) (); | |
407 | /* Maybe better to set a flag to be checked somewhere as to | |
408 | whether display the prompt or not. */ | |
409 | } | |
410 | } | |
411 | ||
412 | /* We are done with the event loop. There are no more event sources | |
413 | to listen to. So we exit GDB. */ | |
414 | return; | |
415 | } | |
416 | ||
2611b1a5 SC |
417 | /* Initialize the tui by installing several gdb hooks, initializing |
418 | the tui IO and preparing the readline with the kind binding. */ | |
419 | static void | |
420 | tui_init_hook (char *argv0) | |
421 | { | |
9c393d00 SC |
422 | /* Don't enable the TUI if a specific interpreter is installed. */ |
423 | if (interpreter_p) | |
424 | return; | |
425 | ||
2611b1a5 SC |
426 | /* Install exit handler to leave the screen in a good shape. */ |
427 | atexit (tui_exit); | |
428 | ||
429 | initializeStaticData (); | |
430 | ||
431 | /* Install the permanent hooks. */ | |
432 | tui_target_new_objfile_chain = target_new_objfile_hook; | |
433 | target_new_objfile_hook = tui_new_objfile_hook; | |
434 | ||
435 | tui_initialize_io (); | |
436 | tui_initialize_readline (); | |
437 | ||
2b68e2c5 SC |
438 | /* Tell gdb to use the tui_command_loop as the main loop. */ |
439 | command_loop_hook = tui_command_loop; | |
440 | ||
2611b1a5 SC |
441 | /* Decide in which mode to start using GDB (based on -tui). */ |
442 | if (tui_version) | |
443 | { | |
444 | tui_enable (); | |
445 | } | |
446 | } | |
447 | ||
448 | /* Initialize the tui. */ | |
449 | void | |
450 | _initialize_tui (void) | |
451 | { | |
452 | /* Setup initialization hook. */ | |
453 | init_ui_hook = tui_init_hook; | |
454 | } | |
455 |