Commit | Line | Data |
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b5a0ac70 | 1 | /* Top level stuff for GDB, the GNU debugger. |
637537d0 | 2 | |
9b254dd1 | 3 | Copyright (C) 1999, 2000, 2001, 2002, 2004, 2005, 2007, 2008 |
6aba47ca | 4 | Free Software Foundation, Inc. |
637537d0 | 5 | |
b5a0ac70 SS |
6 | Written by Elena Zannoni <ezannoni@cygnus.com> of Cygnus Solutions. |
7 | ||
8 | This file is part of GDB. | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 12 | the Free Software Foundation; either version 3 of the License, or |
b5a0ac70 SS |
13 | (at your option) any later version. |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
b5a0ac70 SS |
22 | |
23 | #include "defs.h" | |
0f71a2f6 | 24 | #include "top.h" |
b5a0ac70 | 25 | #include "inferior.h" |
e514a9d6 | 26 | #include "target.h" |
c5aa993b | 27 | #include "terminal.h" /* for job_control */ |
9e0b60a8 | 28 | #include "event-loop.h" |
c2c6d25f | 29 | #include "event-top.h" |
4389a95a | 30 | #include "interps.h" |
042be3a9 | 31 | #include <signal.h> |
60250e8b | 32 | #include "exceptions.h" |
16026cd7 | 33 | #include "cli/cli-script.h" /* for reset_command_nest_depth */ |
d01a8610 | 34 | #include "main.h" |
b5a0ac70 | 35 | |
104c1213 JM |
36 | /* For dont_repeat() */ |
37 | #include "gdbcmd.h" | |
38 | ||
b5a0ac70 | 39 | /* readline include files */ |
dbda9972 AC |
40 | #include "readline/readline.h" |
41 | #include "readline/history.h" | |
b5a0ac70 SS |
42 | |
43 | /* readline defines this. */ | |
44 | #undef savestring | |
45 | ||
c2c6d25f JM |
46 | static void rl_callback_read_char_wrapper (gdb_client_data client_data); |
47 | static void command_line_handler (char *rl); | |
c2c6d25f JM |
48 | static void change_line_handler (void); |
49 | static void change_annotation_level (void); | |
50 | static void command_handler (char *command); | |
b5a0ac70 SS |
51 | |
52 | /* Signal handlers. */ | |
6d318c73 | 53 | #ifdef SIGQUIT |
c2c6d25f | 54 | static void handle_sigquit (int sig); |
6d318c73 | 55 | #endif |
0f0b8dcd | 56 | #ifdef SIGHUP |
c2c6d25f | 57 | static void handle_sighup (int sig); |
0f0b8dcd | 58 | #endif |
c2c6d25f | 59 | static void handle_sigfpe (int sig); |
d4f3574e | 60 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
c2c6d25f | 61 | static void handle_sigwinch (int sig); |
0f71a2f6 | 62 | #endif |
b5a0ac70 SS |
63 | |
64 | /* Functions to be invoked by the event loop in response to | |
65 | signals. */ | |
0f0b8dcd | 66 | #if defined (SIGQUIT) || defined (SIGHUP) |
c2c6d25f | 67 | static void async_do_nothing (gdb_client_data); |
0f0b8dcd DJ |
68 | #endif |
69 | #ifdef SIGHUP | |
c2c6d25f | 70 | static void async_disconnect (gdb_client_data); |
0f0b8dcd | 71 | #endif |
c2c6d25f | 72 | static void async_float_handler (gdb_client_data); |
0f0b8dcd | 73 | #ifdef STOP_SIGNAL |
c2c6d25f | 74 | static void async_stop_sig (gdb_client_data); |
0f0b8dcd | 75 | #endif |
b5a0ac70 | 76 | |
b5a0ac70 SS |
77 | /* Readline offers an alternate interface, via callback |
78 | functions. These are all included in the file callback.c in the | |
79 | readline distribution. This file provides (mainly) a function, which | |
80 | the event loop uses as callback (i.e. event handler) whenever an event | |
81 | is detected on the standard input file descriptor. | |
82 | readline_callback_read_char is called (by the GDB event loop) whenever | |
83 | there is a new character ready on the input stream. This function | |
84 | incrementally builds a buffer internal to readline where it | |
85 | accumulates the line read up to the point of invocation. In the | |
86 | special case in which the character read is newline, the function | |
87 | invokes a GDB supplied callback routine, which does the processing of | |
88 | a full command line. This latter routine is the asynchronous analog | |
89 | of the old command_line_input in gdb. Instead of invoking (and waiting | |
90 | for) readline to read the command line and pass it back to | |
91 | command_loop for processing, the new command_line_handler function has | |
92 | the command line already available as its parameter. INPUT_HANDLER is | |
93 | to be set to the function that readline will invoke when a complete | |
94 | line of input is ready. CALL_READLINE is to be set to the function | |
95 | that readline offers as callback to the event_loop. */ | |
96 | ||
c2c6d25f JM |
97 | void (*input_handler) (char *); |
98 | void (*call_readline) (gdb_client_data); | |
b5a0ac70 SS |
99 | |
100 | /* Important variables for the event loop. */ | |
101 | ||
102 | /* This is used to determine if GDB is using the readline library or | |
103 | its own simplified form of readline. It is used by the asynchronous | |
0f71a2f6 | 104 | form of the set editing command. |
392a587b | 105 | ezannoni: as of 1999-04-29 I expect that this |
b5a0ac70 SS |
106 | variable will not be used after gdb is changed to use the event |
107 | loop as default engine, and event-top.c is merged into top.c. */ | |
108 | int async_command_editing_p; | |
109 | ||
110 | /* This variable contains the new prompt that the user sets with the | |
111 | set prompt command. */ | |
112 | char *new_async_prompt; | |
113 | ||
114 | /* This is the annotation suffix that will be used when the | |
115 | annotation_level is 2. */ | |
116 | char *async_annotation_suffix; | |
117 | ||
104c1213 JM |
118 | /* This is used to display the notification of the completion of an |
119 | asynchronous execution command. */ | |
120 | int exec_done_display_p = 0; | |
121 | ||
b5a0ac70 SS |
122 | /* This is the file descriptor for the input stream that GDB uses to |
123 | read commands from. */ | |
124 | int input_fd; | |
125 | ||
126 | /* This is the prompt stack. Prompts will be pushed on the stack as | |
127 | needed by the different 'kinds' of user inputs GDB is asking | |
128 | for. See event-loop.h. */ | |
129 | struct prompts the_prompts; | |
130 | ||
131 | /* signal handling variables */ | |
132 | /* Each of these is a pointer to a function that the event loop will | |
133 | invoke if the corresponding signal has received. The real signal | |
134 | handlers mark these functions as ready to be executed and the event | |
135 | loop, in a later iteration, calls them. See the function | |
136 | invoke_async_signal_handler. */ | |
97bb9d91 | 137 | void *sigint_token; |
b5a0ac70 | 138 | #ifdef SIGHUP |
97bb9d91 | 139 | void *sighup_token; |
b5a0ac70 | 140 | #endif |
6d318c73 | 141 | #ifdef SIGQUIT |
97bb9d91 | 142 | void *sigquit_token; |
6d318c73 | 143 | #endif |
97bb9d91 | 144 | void *sigfpe_token; |
b5a0ac70 | 145 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
97bb9d91 | 146 | void *sigwinch_token; |
b5a0ac70 | 147 | #endif |
0f71a2f6 | 148 | #ifdef STOP_SIGNAL |
97bb9d91 | 149 | void *sigtstp_token; |
0f71a2f6 JM |
150 | #endif |
151 | ||
b5a0ac70 SS |
152 | /* Structure to save a partially entered command. This is used when |
153 | the user types '\' at the end of a command line. This is necessary | |
154 | because each line of input is handled by a different call to | |
155 | command_line_handler, and normally there is no state retained | |
156 | between different calls. */ | |
157 | int more_to_come = 0; | |
158 | ||
159 | struct readline_input_state | |
160 | { | |
161 | char *linebuffer; | |
162 | char *linebuffer_ptr; | |
163 | } | |
164 | readline_input_state; | |
467d8519 TT |
165 | |
166 | /* This hook is called by rl_callback_read_char_wrapper after each | |
167 | character is processed. */ | |
168 | void (*after_char_processing_hook) (); | |
b5a0ac70 SS |
169 | \f |
170 | ||
701f9765 | 171 | /* Wrapper function for calling into the readline library. The event |
c2c6d25f JM |
172 | loop expects the callback function to have a paramter, while readline |
173 | expects none. */ | |
174 | static void | |
175 | rl_callback_read_char_wrapper (gdb_client_data client_data) | |
176 | { | |
177 | rl_callback_read_char (); | |
467d8519 TT |
178 | if (after_char_processing_hook) |
179 | (*after_char_processing_hook) (); | |
c2c6d25f JM |
180 | } |
181 | ||
b5a0ac70 | 182 | /* Initialize all the necessary variables, start the event loop, |
085dd6e6 | 183 | register readline, and stdin, start the loop. */ |
b5a0ac70 | 184 | void |
c2c6d25f | 185 | cli_command_loop (void) |
b5a0ac70 | 186 | { |
0f71a2f6 JM |
187 | /* If we are using readline, set things up and display the first |
188 | prompt, otherwise just print the prompt. */ | |
189 | if (async_command_editing_p) | |
190 | { | |
2ed23f5f MS |
191 | int length; |
192 | char *a_prompt; | |
193 | char *gdb_prompt = get_prompt (); | |
194 | ||
0f71a2f6 | 195 | /* Tell readline what the prompt to display is and what function it |
c5aa993b JM |
196 | will need to call after a whole line is read. This also displays |
197 | the first prompt. */ | |
2ed23f5f MS |
198 | length = strlen (PREFIX (0)) |
199 | + strlen (gdb_prompt) + strlen (SUFFIX (0)) + 1; | |
200 | a_prompt = (char *) alloca (length); | |
0f71a2f6 | 201 | strcpy (a_prompt, PREFIX (0)); |
9e0b60a8 | 202 | strcat (a_prompt, gdb_prompt); |
0f71a2f6 JM |
203 | strcat (a_prompt, SUFFIX (0)); |
204 | rl_callback_handler_install (a_prompt, input_handler); | |
205 | } | |
206 | else | |
207 | display_gdb_prompt (0); | |
b5a0ac70 | 208 | |
085dd6e6 JM |
209 | /* Now it's time to start the event loop. */ |
210 | start_event_loop (); | |
b5a0ac70 SS |
211 | } |
212 | ||
213 | /* Change the function to be invoked every time there is a character | |
214 | ready on stdin. This is used when the user sets the editing off, | |
215 | therefore bypassing readline, and letting gdb handle the input | |
216 | itself, via gdb_readline2. Also it is used in the opposite case in | |
217 | which the user sets editing on again, by restoring readline | |
218 | handling of the input. */ | |
392a587b | 219 | static void |
c2c6d25f | 220 | change_line_handler (void) |
b5a0ac70 | 221 | { |
c2c6d25f JM |
222 | /* NOTE: this operates on input_fd, not instream. If we are reading |
223 | commands from a file, instream will point to the file. However in | |
224 | async mode, we always read commands from a file with editing | |
225 | off. This means that the 'set editing on/off' will have effect | |
226 | only on the interactive session. */ | |
227 | ||
b5a0ac70 SS |
228 | if (async_command_editing_p) |
229 | { | |
230 | /* Turn on editing by using readline. */ | |
c2c6d25f | 231 | call_readline = rl_callback_read_char_wrapper; |
0f71a2f6 | 232 | input_handler = command_line_handler; |
b5a0ac70 SS |
233 | } |
234 | else | |
235 | { | |
236 | /* Turn off editing by using gdb_readline2. */ | |
237 | rl_callback_handler_remove (); | |
238 | call_readline = gdb_readline2; | |
0f71a2f6 JM |
239 | |
240 | /* Set up the command handler as well, in case we are called as | |
c5aa993b | 241 | first thing from .gdbinit. */ |
0f71a2f6 | 242 | input_handler = command_line_handler; |
b5a0ac70 | 243 | } |
b5a0ac70 SS |
244 | } |
245 | ||
246 | /* Displays the prompt. The prompt that is displayed is the current | |
247 | top of the prompt stack, if the argument NEW_PROMPT is | |
248 | 0. Otherwise, it displays whatever NEW_PROMPT is. This is used | |
249 | after each gdb command has completed, and in the following cases: | |
0f71a2f6 JM |
250 | 1. when the user enters a command line which is ended by '\' |
251 | indicating that the command will continue on the next line. | |
b5a0ac70 | 252 | In that case the prompt that is displayed is the empty string. |
0f71a2f6 JM |
253 | 2. When the user is entering 'commands' for a breakpoint, or |
254 | actions for a tracepoint. In this case the prompt will be '>' | |
255 | 3. Other???? | |
b5a0ac70 SS |
256 | FIXME: 2. & 3. not implemented yet for async. */ |
257 | void | |
c2c6d25f | 258 | display_gdb_prompt (char *new_prompt) |
b5a0ac70 SS |
259 | { |
260 | int prompt_length = 0; | |
c5aa993b | 261 | char *gdb_prompt = get_prompt (); |
b5a0ac70 | 262 | |
16026cd7 AS |
263 | /* Reset the nesting depth used when trace-commands is set. */ |
264 | reset_command_nest_depth (); | |
265 | ||
4389a95a AC |
266 | /* Each interpreter has its own rules on displaying the command |
267 | prompt. */ | |
268 | if (!current_interp_display_prompt_p ()) | |
fb40c209 | 269 | return; |
fb40c209 | 270 | |
6426a772 | 271 | if (target_executing && sync_execution) |
adf40b2e JM |
272 | { |
273 | /* This is to trick readline into not trying to display the | |
6426a772 JM |
274 | prompt. Even though we display the prompt using this |
275 | function, readline still tries to do its own display if we | |
276 | don't call rl_callback_handler_install and | |
277 | rl_callback_handler_remove (which readline detects because a | |
278 | global variable is not set). If readline did that, it could | |
279 | mess up gdb signal handlers for SIGINT. Readline assumes | |
280 | that between calls to rl_set_signals and rl_clear_signals gdb | |
281 | doesn't do anything with the signal handlers. Well, that's | |
282 | not the case, because when the target executes we change the | |
283 | SIGINT signal handler. If we allowed readline to display the | |
284 | prompt, the signal handler change would happen exactly | |
285 | between the calls to the above two functions. | |
286 | Calling rl_callback_handler_remove(), does the job. */ | |
adf40b2e JM |
287 | |
288 | rl_callback_handler_remove (); | |
289 | return; | |
290 | } | |
291 | ||
b5a0ac70 SS |
292 | if (!new_prompt) |
293 | { | |
294 | /* Just use the top of the prompt stack. */ | |
295 | prompt_length = strlen (PREFIX (0)) + | |
296 | strlen (SUFFIX (0)) + | |
9e0b60a8 | 297 | strlen (gdb_prompt) + 1; |
b5a0ac70 SS |
298 | |
299 | new_prompt = (char *) alloca (prompt_length); | |
300 | ||
301 | /* Prefix needs to have new line at end. */ | |
302 | strcpy (new_prompt, PREFIX (0)); | |
9e0b60a8 | 303 | strcat (new_prompt, gdb_prompt); |
b5a0ac70 SS |
304 | /* Suffix needs to have a new line at end and \032 \032 at |
305 | beginning. */ | |
306 | strcat (new_prompt, SUFFIX (0)); | |
307 | } | |
308 | ||
309 | if (async_command_editing_p) | |
310 | { | |
311 | rl_callback_handler_remove (); | |
312 | rl_callback_handler_install (new_prompt, input_handler); | |
313 | } | |
adf40b2e | 314 | /* new_prompt at this point can be the top of the stack or the one passed in */ |
b5a0ac70 SS |
315 | else if (new_prompt) |
316 | { | |
317 | /* Don't use a _filtered function here. It causes the assumed | |
318 | character position to be off, since the newline we read from | |
319 | the user is not accounted for. */ | |
320 | fputs_unfiltered (new_prompt, gdb_stdout); | |
b5a0ac70 SS |
321 | gdb_flush (gdb_stdout); |
322 | } | |
323 | } | |
324 | ||
325 | /* Used when the user requests a different annotation level, with | |
326 | 'set annotate'. It pushes a new prompt (with prefix and suffix) on top | |
327 | of the prompt stack, if the annotation level desired is 2, otherwise | |
328 | it pops the top of the prompt stack when we want the annotation level | |
adf40b2e | 329 | to be the normal ones (1 or 0). */ |
392a587b | 330 | static void |
c2c6d25f | 331 | change_annotation_level (void) |
b5a0ac70 SS |
332 | { |
333 | char *prefix, *suffix; | |
334 | ||
335 | if (!PREFIX (0) || !PROMPT (0) || !SUFFIX (0)) | |
336 | { | |
337 | /* The prompt stack has not been initialized to "", we are | |
338 | using gdb w/o the --async switch */ | |
8a3fe4f8 | 339 | warning (_("Command has same effect as set annotate")); |
b5a0ac70 SS |
340 | return; |
341 | } | |
342 | ||
343 | if (annotation_level > 1) | |
344 | { | |
345 | if (!strcmp (PREFIX (0), "") && !strcmp (SUFFIX (0), "")) | |
346 | { | |
347 | /* Push a new prompt if the previous annotation_level was not >1. */ | |
348 | prefix = (char *) alloca (strlen (async_annotation_suffix) + 10); | |
349 | strcpy (prefix, "\n\032\032pre-"); | |
350 | strcat (prefix, async_annotation_suffix); | |
351 | strcat (prefix, "\n"); | |
352 | ||
353 | suffix = (char *) alloca (strlen (async_annotation_suffix) + 6); | |
354 | strcpy (suffix, "\n\032\032"); | |
355 | strcat (suffix, async_annotation_suffix); | |
356 | strcat (suffix, "\n"); | |
357 | ||
358 | push_prompt (prefix, (char *) 0, suffix); | |
359 | } | |
360 | } | |
361 | else | |
362 | { | |
363 | if (strcmp (PREFIX (0), "") && strcmp (SUFFIX (0), "")) | |
364 | { | |
365 | /* Pop the top of the stack, we are going back to annotation < 1. */ | |
366 | pop_prompt (); | |
367 | } | |
368 | } | |
369 | } | |
370 | ||
371 | /* Pushes a new prompt on the prompt stack. Each prompt has three | |
372 | parts: prefix, prompt, suffix. Usually prefix and suffix are empty | |
373 | strings, except when the annotation level is 2. Memory is allocated | |
374 | within savestring for the new prompt. */ | |
43ff13b4 | 375 | void |
c2c6d25f | 376 | push_prompt (char *prefix, char *prompt, char *suffix) |
b5a0ac70 SS |
377 | { |
378 | the_prompts.top++; | |
379 | PREFIX (0) = savestring (prefix, strlen (prefix)); | |
380 | ||
43ff13b4 JM |
381 | /* Note that this function is used by the set annotate 2 |
382 | command. This is why we take care of saving the old prompt | |
383 | in case a new one is not specified. */ | |
b5a0ac70 SS |
384 | if (prompt) |
385 | PROMPT (0) = savestring (prompt, strlen (prompt)); | |
386 | else | |
387 | PROMPT (0) = savestring (PROMPT (-1), strlen (PROMPT (-1))); | |
388 | ||
389 | SUFFIX (0) = savestring (suffix, strlen (suffix)); | |
390 | } | |
391 | ||
392 | /* Pops the top of the prompt stack, and frees the memory allocated for it. */ | |
43ff13b4 | 393 | void |
c2c6d25f | 394 | pop_prompt (void) |
b5a0ac70 | 395 | { |
43ff13b4 JM |
396 | /* If we are not during a 'synchronous' execution command, in which |
397 | case, the top prompt would be empty. */ | |
398 | if (strcmp (PROMPT (0), "")) | |
399 | /* This is for the case in which the prompt is set while the | |
400 | annotation level is 2. The top prompt will be changed, but when | |
401 | we return to annotation level < 2, we want that new prompt to be | |
402 | in effect, until the user does another 'set prompt'. */ | |
403 | if (strcmp (PROMPT (0), PROMPT (-1))) | |
404 | { | |
b8c9b27d | 405 | xfree (PROMPT (-1)); |
43ff13b4 JM |
406 | PROMPT (-1) = savestring (PROMPT (0), strlen (PROMPT (0))); |
407 | } | |
b5a0ac70 | 408 | |
b8c9b27d KB |
409 | xfree (PREFIX (0)); |
410 | xfree (PROMPT (0)); | |
411 | xfree (SUFFIX (0)); | |
b5a0ac70 SS |
412 | the_prompts.top--; |
413 | } | |
c2c6d25f JM |
414 | |
415 | /* When there is an event ready on the stdin file desriptor, instead | |
416 | of calling readline directly throught the callback function, or | |
417 | instead of calling gdb_readline2, give gdb a chance to detect | |
418 | errors and do something. */ | |
419 | void | |
2acceee2 | 420 | stdin_event_handler (int error, gdb_client_data client_data) |
c2c6d25f JM |
421 | { |
422 | if (error) | |
423 | { | |
a3f17187 | 424 | printf_unfiltered (_("error detected on stdin\n")); |
2acceee2 | 425 | delete_file_handler (input_fd); |
c2c6d25f JM |
426 | discard_all_continuations (); |
427 | /* If stdin died, we may as well kill gdb. */ | |
c5394b80 | 428 | quit_command ((char *) 0, stdin == instream); |
c2c6d25f JM |
429 | } |
430 | else | |
6426a772 | 431 | (*call_readline) (client_data); |
c2c6d25f JM |
432 | } |
433 | ||
6426a772 JM |
434 | /* Re-enable stdin after the end of an execution command in |
435 | synchronous mode, or after an error from the target, and we aborted | |
436 | the exec operation. */ | |
437 | ||
438 | void | |
712af3be | 439 | async_enable_stdin (void) |
6426a772 | 440 | { |
32c1e744 VP |
441 | if (sync_execution) |
442 | { | |
443 | /* See NOTE in async_disable_stdin() */ | |
444 | /* FIXME: cagney/1999-09-27: Call this before clearing | |
445 | sync_execution. Current target_terminal_ours() implementations | |
446 | check for sync_execution before switching the terminal. */ | |
447 | target_terminal_ours (); | |
448 | pop_prompt (); | |
449 | sync_execution = 0; | |
450 | } | |
6426a772 JM |
451 | } |
452 | ||
453 | /* Disable reads from stdin (the console) marking the command as | |
454 | synchronous. */ | |
455 | ||
456 | void | |
457 | async_disable_stdin (void) | |
458 | { | |
459 | sync_execution = 1; | |
460 | push_prompt ("", "", ""); | |
461 | /* FIXME: cagney/1999-09-27: At present this call is technically | |
462 | redundant since infcmd.c and infrun.c both already call | |
463 | target_terminal_inferior(). As the terminal handling (in | |
464 | sync/async mode) is refined, the duplicate calls can be | |
465 | eliminated (Here or in infcmd.c/infrun.c). */ | |
466 | target_terminal_inferior (); | |
6426a772 | 467 | } |
b5a0ac70 | 468 | \f |
6426a772 | 469 | |
b5a0ac70 SS |
470 | /* Handles a gdb command. This function is called by |
471 | command_line_handler, which has processed one or more input lines | |
472 | into COMMAND. */ | |
392a587b | 473 | /* NOTE: 1999-04-30 This is the asynchronous version of the command_loop |
b5a0ac70 SS |
474 | function. The command_loop function will be obsolete when we |
475 | switch to use the event loop at every execution of gdb. */ | |
392a587b | 476 | static void |
c2c6d25f | 477 | command_handler (char *command) |
b5a0ac70 SS |
478 | { |
479 | struct cleanup *old_chain; | |
480 | int stdin_is_tty = ISATTY (stdin); | |
481 | long time_at_cmd_start; | |
482 | #ifdef HAVE_SBRK | |
483 | long space_at_cmd_start = 0; | |
484 | #endif | |
485 | extern int display_time; | |
486 | extern int display_space; | |
487 | ||
b5a0ac70 SS |
488 | quit_flag = 0; |
489 | if (instream == stdin && stdin_is_tty) | |
490 | reinitialize_more_filter (); | |
e2273c6d | 491 | old_chain = make_cleanup (null_cleanup, 0); |
b5a0ac70 | 492 | |
b5a0ac70 SS |
493 | /* If readline returned a NULL command, it means that the |
494 | connection with the terminal is gone. This happens at the | |
495 | end of a testsuite run, after Expect has hung up | |
496 | but GDB is still alive. In such a case, we just quit gdb | |
497 | killing the inferior program too. */ | |
498 | if (command == 0) | |
fa3fd85b AS |
499 | { |
500 | printf_unfiltered ("quit\n"); | |
501 | execute_command ("quit", stdin == instream); | |
502 | } | |
b5a0ac70 SS |
503 | |
504 | time_at_cmd_start = get_run_time (); | |
505 | ||
506 | if (display_space) | |
507 | { | |
508 | #ifdef HAVE_SBRK | |
b5a0ac70 | 509 | char *lim = (char *) sbrk (0); |
6dd77b81 | 510 | space_at_cmd_start = lim - lim_at_start; |
b5a0ac70 SS |
511 | #endif |
512 | } | |
513 | ||
514 | execute_command (command, instream == stdin); | |
c5aa993b | 515 | |
43ff13b4 JM |
516 | /* Do any commands attached to breakpoint we stopped at. Only if we |
517 | are always running synchronously. Or if we have just executed a | |
518 | command that doesn't start the target. */ | |
6426a772 | 519 | if (!target_can_async_p () || !target_executing) |
43ff13b4 JM |
520 | { |
521 | bpstat_do_actions (&stop_bpstat); | |
522 | do_cleanups (old_chain); | |
c5aa993b | 523 | |
43ff13b4 JM |
524 | if (display_time) |
525 | { | |
526 | long cmd_time = get_run_time () - time_at_cmd_start; | |
527 | ||
a3f17187 | 528 | printf_unfiltered (_("Command execution time: %ld.%06ld\n"), |
43ff13b4 JM |
529 | cmd_time / 1000000, cmd_time % 1000000); |
530 | } | |
531 | ||
532 | if (display_space) | |
533 | { | |
534 | #ifdef HAVE_SBRK | |
43ff13b4 | 535 | char *lim = (char *) sbrk (0); |
6dd77b81 | 536 | long space_now = lim - lim_at_start; |
43ff13b4 JM |
537 | long space_diff = space_now - space_at_cmd_start; |
538 | ||
a3f17187 | 539 | printf_unfiltered (_("Space used: %ld (%c%ld for this command)\n"), |
43ff13b4 JM |
540 | space_now, |
541 | (space_diff >= 0 ? '+' : '-'), | |
542 | space_diff); | |
543 | #endif | |
544 | } | |
545 | } | |
546 | } | |
547 | ||
b5a0ac70 SS |
548 | /* Handle a complete line of input. This is called by the callback |
549 | mechanism within the readline library. Deal with incomplete commands | |
550 | as well, by saving the partial input in a global buffer. */ | |
551 | ||
392a587b | 552 | /* NOTE: 1999-04-30 This is the asynchronous version of the |
b5a0ac70 SS |
553 | command_line_input function. command_line_input will become |
554 | obsolete once we use the event loop as the default mechanism in | |
555 | GDB. */ | |
556 | static void | |
c2c6d25f | 557 | command_line_handler (char *rl) |
b5a0ac70 SS |
558 | { |
559 | static char *linebuffer = 0; | |
560 | static unsigned linelength = 0; | |
52f0bd74 | 561 | char *p; |
b5a0ac70 | 562 | char *p1; |
b5a0ac70 SS |
563 | extern char *line; |
564 | extern int linesize; | |
565 | char *nline; | |
566 | char got_eof = 0; | |
567 | ||
568 | ||
569 | int repeat = (instream == stdin); | |
570 | ||
571 | if (annotation_level > 1 && instream == stdin) | |
572 | { | |
a3f17187 | 573 | printf_unfiltered (("\n\032\032post-")); |
306d9ac5 | 574 | puts_unfiltered (async_annotation_suffix); |
a3f17187 | 575 | printf_unfiltered (("\n")); |
b5a0ac70 SS |
576 | } |
577 | ||
578 | if (linebuffer == 0) | |
579 | { | |
580 | linelength = 80; | |
581 | linebuffer = (char *) xmalloc (linelength); | |
582 | } | |
583 | ||
584 | p = linebuffer; | |
585 | ||
586 | if (more_to_come) | |
587 | { | |
588 | strcpy (linebuffer, readline_input_state.linebuffer); | |
589 | p = readline_input_state.linebuffer_ptr; | |
b8c9b27d | 590 | xfree (readline_input_state.linebuffer); |
b5a0ac70 | 591 | more_to_come = 0; |
adf40b2e | 592 | pop_prompt (); |
b5a0ac70 SS |
593 | } |
594 | ||
595 | #ifdef STOP_SIGNAL | |
596 | if (job_control) | |
0f71a2f6 | 597 | signal (STOP_SIGNAL, handle_stop_sig); |
b5a0ac70 SS |
598 | #endif |
599 | ||
600 | /* Make sure that all output has been output. Some machines may let | |
601 | you get away with leaving out some of the gdb_flush, but not all. */ | |
602 | wrap_here (""); | |
603 | gdb_flush (gdb_stdout); | |
604 | gdb_flush (gdb_stderr); | |
605 | ||
606 | if (source_file_name != NULL) | |
637537d0 | 607 | ++source_line_number; |
b5a0ac70 SS |
608 | |
609 | /* If we are in this case, then command_handler will call quit | |
610 | and exit from gdb. */ | |
611 | if (!rl || rl == (char *) EOF) | |
612 | { | |
613 | got_eof = 1; | |
614 | command_handler (0); | |
40742ab6 | 615 | return; /* Lint. */ |
b5a0ac70 SS |
616 | } |
617 | if (strlen (rl) + 1 + (p - linebuffer) > linelength) | |
618 | { | |
619 | linelength = strlen (rl) + 1 + (p - linebuffer); | |
620 | nline = (char *) xrealloc (linebuffer, linelength); | |
621 | p += nline - linebuffer; | |
622 | linebuffer = nline; | |
623 | } | |
624 | p1 = rl; | |
625 | /* Copy line. Don't copy null at end. (Leaves line alone | |
626 | if this was just a newline) */ | |
627 | while (*p1) | |
628 | *p++ = *p1++; | |
629 | ||
b8c9b27d | 630 | xfree (rl); /* Allocated in readline. */ |
b5a0ac70 | 631 | |
4dd79c29 | 632 | if (p > linebuffer && *(p - 1) == '\\') |
b5a0ac70 | 633 | { |
b5a0ac70 SS |
634 | p--; /* Put on top of '\'. */ |
635 | ||
d96429cd AS |
636 | readline_input_state.linebuffer = savestring (linebuffer, |
637 | strlen (linebuffer)); | |
638 | readline_input_state.linebuffer_ptr = p; | |
639 | ||
640 | /* We will not invoke a execute_command if there is more | |
641 | input expected to complete the command. So, we need to | |
642 | print an empty prompt here. */ | |
643 | more_to_come = 1; | |
644 | push_prompt ("", "", ""); | |
645 | display_gdb_prompt (0); | |
646 | return; | |
b5a0ac70 SS |
647 | } |
648 | ||
649 | #ifdef STOP_SIGNAL | |
650 | if (job_control) | |
651 | signal (STOP_SIGNAL, SIG_DFL); | |
652 | #endif | |
653 | ||
654 | #define SERVER_COMMAND_LENGTH 7 | |
655 | server_command = | |
656 | (p - linebuffer > SERVER_COMMAND_LENGTH) | |
bf896cb0 | 657 | && strncmp (linebuffer, "server ", SERVER_COMMAND_LENGTH) == 0; |
b5a0ac70 SS |
658 | if (server_command) |
659 | { | |
660 | /* Note that we don't set `line'. Between this and the check in | |
661 | dont_repeat, this insures that repeating will still do the | |
662 | right thing. */ | |
663 | *p = '\0'; | |
664 | command_handler (linebuffer + SERVER_COMMAND_LENGTH); | |
665 | display_gdb_prompt (0); | |
666 | return; | |
667 | } | |
668 | ||
669 | /* Do history expansion if that is wished. */ | |
670 | if (history_expansion_p && instream == stdin | |
671 | && ISATTY (instream)) | |
672 | { | |
673 | char *history_value; | |
674 | int expanded; | |
675 | ||
676 | *p = '\0'; /* Insert null now. */ | |
677 | expanded = history_expand (linebuffer, &history_value); | |
678 | if (expanded) | |
679 | { | |
680 | /* Print the changes. */ | |
681 | printf_unfiltered ("%s\n", history_value); | |
682 | ||
683 | /* If there was an error, call this function again. */ | |
684 | if (expanded < 0) | |
685 | { | |
b8c9b27d | 686 | xfree (history_value); |
b5a0ac70 SS |
687 | return; |
688 | } | |
689 | if (strlen (history_value) > linelength) | |
690 | { | |
691 | linelength = strlen (history_value) + 1; | |
692 | linebuffer = (char *) xrealloc (linebuffer, linelength); | |
693 | } | |
694 | strcpy (linebuffer, history_value); | |
695 | p = linebuffer + strlen (linebuffer); | |
b5a0ac70 | 696 | } |
f5b73fbb | 697 | xfree (history_value); |
b5a0ac70 SS |
698 | } |
699 | ||
700 | /* If we just got an empty line, and that is supposed | |
701 | to repeat the previous command, return the value in the | |
702 | global buffer. */ | |
703 | if (repeat && p == linebuffer && *p != '\\') | |
704 | { | |
705 | command_handler (line); | |
706 | display_gdb_prompt (0); | |
707 | return; | |
708 | } | |
709 | ||
710 | for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++); | |
711 | if (repeat && !*p1) | |
712 | { | |
713 | command_handler (line); | |
714 | display_gdb_prompt (0); | |
715 | return; | |
716 | } | |
717 | ||
718 | *p = 0; | |
719 | ||
720 | /* Add line to history if appropriate. */ | |
721 | if (instream == stdin | |
722 | && ISATTY (stdin) && *linebuffer) | |
723 | add_history (linebuffer); | |
724 | ||
725 | /* Note: lines consisting solely of comments are added to the command | |
726 | history. This is useful when you type a command, and then | |
727 | realize you don't want to execute it quite yet. You can comment | |
728 | out the command and then later fetch it from the value history | |
729 | and remove the '#'. The kill ring is probably better, but some | |
730 | people are in the habit of commenting things out. */ | |
731 | if (*p1 == '#') | |
732 | *p1 = '\0'; /* Found a comment. */ | |
733 | ||
734 | /* Save into global buffer if appropriate. */ | |
735 | if (repeat) | |
736 | { | |
737 | if (linelength > linesize) | |
738 | { | |
739 | line = xrealloc (line, linelength); | |
740 | linesize = linelength; | |
741 | } | |
742 | strcpy (line, linebuffer); | |
743 | if (!more_to_come) | |
744 | { | |
745 | command_handler (line); | |
746 | display_gdb_prompt (0); | |
747 | } | |
748 | return; | |
749 | } | |
750 | ||
751 | command_handler (linebuffer); | |
752 | display_gdb_prompt (0); | |
753 | return; | |
754 | } | |
755 | ||
756 | /* Does reading of input from terminal w/o the editing features | |
757 | provided by the readline library. */ | |
758 | ||
392a587b | 759 | /* NOTE: 1999-04-30 Asynchronous version of gdb_readline. gdb_readline |
b5a0ac70 SS |
760 | will become obsolete when the event loop is made the default |
761 | execution for gdb. */ | |
085dd6e6 | 762 | void |
c2c6d25f | 763 | gdb_readline2 (gdb_client_data client_data) |
b5a0ac70 SS |
764 | { |
765 | int c; | |
766 | char *result; | |
767 | int input_index = 0; | |
768 | int result_size = 80; | |
7be570e7 JM |
769 | static int done_once = 0; |
770 | ||
771 | /* Unbuffer the input stream, so that, later on, the calls to fgetc | |
772 | fetch only one char at the time from the stream. The fgetc's will | |
773 | get up to the first newline, but there may be more chars in the | |
774 | stream after '\n'. If we buffer the input and fgetc drains the | |
775 | stream, getting stuff beyond the newline as well, a select, done | |
776 | afterwards will not trigger. */ | |
777 | if (!done_once && !ISATTY (instream)) | |
778 | { | |
779 | setbuf (instream, NULL); | |
780 | done_once = 1; | |
781 | } | |
b5a0ac70 SS |
782 | |
783 | result = (char *) xmalloc (result_size); | |
784 | ||
785 | /* We still need the while loop here, even though it would seem | |
786 | obvious to invoke gdb_readline2 at every character entered. If | |
787 | not using the readline library, the terminal is in cooked mode, | |
788 | which sends the characters all at once. Poll will notice that the | |
789 | input fd has changed state only after enter is pressed. At this | |
790 | point we still need to fetch all the chars entered. */ | |
791 | ||
792 | while (1) | |
793 | { | |
794 | /* Read from stdin if we are executing a user defined command. | |
795 | This is the right thing for prompt_for_continue, at least. */ | |
796 | c = fgetc (instream ? instream : stdin); | |
797 | ||
798 | if (c == EOF) | |
799 | { | |
800 | if (input_index > 0) | |
801 | /* The last line does not end with a newline. Return it, and | |
802 | if we are called again fgetc will still return EOF and | |
803 | we'll return NULL then. */ | |
804 | break; | |
b8c9b27d | 805 | xfree (result); |
0f71a2f6 | 806 | (*input_handler) (0); |
13ce7133 | 807 | return; |
b5a0ac70 SS |
808 | } |
809 | ||
810 | if (c == '\n') | |
b5a0ac70 SS |
811 | { |
812 | if (input_index > 0 && result[input_index - 1] == '\r') | |
813 | input_index--; | |
814 | break; | |
815 | } | |
b5a0ac70 SS |
816 | |
817 | result[input_index++] = c; | |
818 | while (input_index >= result_size) | |
819 | { | |
820 | result_size *= 2; | |
821 | result = (char *) xrealloc (result, result_size); | |
822 | } | |
823 | } | |
824 | ||
825 | result[input_index++] = '\0'; | |
0f71a2f6 | 826 | (*input_handler) (result); |
b5a0ac70 SS |
827 | } |
828 | \f | |
829 | ||
830 | /* Initialization of signal handlers and tokens. There is a function | |
831 | handle_sig* for each of the signals GDB cares about. Specifically: | |
832 | SIGINT, SIGFPE, SIGQUIT, SIGTSTP, SIGHUP, SIGWINCH. These | |
833 | functions are the actual signal handlers associated to the signals | |
834 | via calls to signal(). The only job for these functions is to | |
835 | enqueue the appropriate event/procedure with the event loop. Such | |
836 | procedures are the old signal handlers. The event loop will take | |
837 | care of invoking the queued procedures to perform the usual tasks | |
838 | associated with the reception of the signal. */ | |
392a587b | 839 | /* NOTE: 1999-04-30 This is the asynchronous version of init_signals. |
b5a0ac70 SS |
840 | init_signals will become obsolete as we move to have to event loop |
841 | as the default for gdb. */ | |
842 | void | |
c2c6d25f | 843 | async_init_signals (void) |
c5aa993b | 844 | { |
b5a0ac70 SS |
845 | signal (SIGINT, handle_sigint); |
846 | sigint_token = | |
0f71a2f6 | 847 | create_async_signal_handler (async_request_quit, NULL); |
a7266fef | 848 | signal (SIGTERM, handle_sigterm); |
b5a0ac70 SS |
849 | |
850 | /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed | |
851 | to the inferior and breakpoints will be ignored. */ | |
852 | #ifdef SIGTRAP | |
853 | signal (SIGTRAP, SIG_DFL); | |
854 | #endif | |
855 | ||
6d318c73 | 856 | #ifdef SIGQUIT |
b5a0ac70 SS |
857 | /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get |
858 | passed to the inferior, which we don't want. It would be | |
859 | possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but | |
860 | on BSD4.3 systems using vfork, that can affect the | |
861 | GDB process as well as the inferior (the signal handling tables | |
862 | might be in memory, shared between the two). Since we establish | |
863 | a handler for SIGQUIT, when we call exec it will set the signal | |
864 | to SIG_DFL for us. */ | |
865 | signal (SIGQUIT, handle_sigquit); | |
866 | sigquit_token = | |
0f71a2f6 | 867 | create_async_signal_handler (async_do_nothing, NULL); |
6d318c73 | 868 | #endif |
b5a0ac70 SS |
869 | #ifdef SIGHUP |
870 | if (signal (SIGHUP, handle_sighup) != SIG_IGN) | |
871 | sighup_token = | |
0f71a2f6 | 872 | create_async_signal_handler (async_disconnect, NULL); |
b5a0ac70 SS |
873 | else |
874 | sighup_token = | |
0f71a2f6 | 875 | create_async_signal_handler (async_do_nothing, NULL); |
b5a0ac70 SS |
876 | #endif |
877 | signal (SIGFPE, handle_sigfpe); | |
878 | sigfpe_token = | |
0f71a2f6 | 879 | create_async_signal_handler (async_float_handler, NULL); |
b5a0ac70 SS |
880 | |
881 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) | |
882 | signal (SIGWINCH, handle_sigwinch); | |
883 | sigwinch_token = | |
0f71a2f6 | 884 | create_async_signal_handler (SIGWINCH_HANDLER, NULL); |
b5a0ac70 | 885 | #endif |
0f71a2f6 JM |
886 | #ifdef STOP_SIGNAL |
887 | sigtstp_token = | |
888 | create_async_signal_handler (async_stop_sig, NULL); | |
889 | #endif | |
890 | ||
891 | } | |
892 | ||
c5aa993b | 893 | void |
97bb9d91 | 894 | mark_async_signal_handler_wrapper (void *token) |
0f71a2f6 | 895 | { |
c2c6d25f | 896 | mark_async_signal_handler ((struct async_signal_handler *) token); |
b5a0ac70 SS |
897 | } |
898 | ||
899 | /* Tell the event loop what to do if SIGINT is received. | |
900 | See event-signal.c. */ | |
c5aa993b | 901 | void |
c2c6d25f | 902 | handle_sigint (int sig) |
b5a0ac70 SS |
903 | { |
904 | signal (sig, handle_sigint); | |
905 | ||
5f960e00 FF |
906 | /* We could be running in a loop reading in symfiles or something so |
907 | it may be quite a while before we get back to the event loop. So | |
908 | set quit_flag to 1 here. Then if QUIT is called before we get to | |
909 | the event loop, we will unwind as expected. */ | |
910 | ||
911 | quit_flag = 1; | |
912 | ||
b5a0ac70 SS |
913 | /* If immediate_quit is set, we go ahead and process the SIGINT right |
914 | away, even if we usually would defer this to the event loop. The | |
915 | assumption here is that it is safe to process ^C immediately if | |
916 | immediate_quit is set. If we didn't, SIGINT would be really | |
917 | processed only the next time through the event loop. To get to | |
918 | that point, though, the command that we want to interrupt needs to | |
b803fb0f DJ |
919 | finish first, which is unacceptable. If immediate quit is not set, |
920 | we process SIGINT the next time through the loop, which is fine. */ | |
921 | gdb_call_async_signal_handler (sigint_token, immediate_quit); | |
b5a0ac70 SS |
922 | } |
923 | ||
a7266fef AS |
924 | /* Quit GDB if SIGTERM is received. |
925 | GDB would quit anyway, but this way it will clean up properly. */ | |
926 | void | |
927 | handle_sigterm (int sig) | |
928 | { | |
929 | signal (sig, handle_sigterm); | |
930 | quit_force ((char *) 0, stdin == instream); | |
931 | } | |
932 | ||
b5a0ac70 | 933 | /* Do the quit. All the checks have been done by the caller. */ |
c5aa993b | 934 | void |
c2c6d25f | 935 | async_request_quit (gdb_client_data arg) |
b5a0ac70 | 936 | { |
5f960e00 | 937 | /* If the quit_flag has gotten reset back to 0 by the time we get |
4ac94eda FF |
938 | back here, that means that an exception was thrown to unwind the |
939 | current command before we got back to the event loop. So there | |
940 | is no reason to call quit again here, unless immediate_quit is | |
941 | set.*/ | |
5f960e00 | 942 | |
4ac94eda FF |
943 | if (quit_flag || immediate_quit) |
944 | quit (); | |
b5a0ac70 SS |
945 | } |
946 | ||
6d318c73 | 947 | #ifdef SIGQUIT |
b5a0ac70 SS |
948 | /* Tell the event loop what to do if SIGQUIT is received. |
949 | See event-signal.c. */ | |
c5aa993b | 950 | static void |
c2c6d25f | 951 | handle_sigquit (int sig) |
b5a0ac70 | 952 | { |
0f71a2f6 | 953 | mark_async_signal_handler_wrapper (sigquit_token); |
b5a0ac70 SS |
954 | signal (sig, handle_sigquit); |
955 | } | |
6d318c73 | 956 | #endif |
b5a0ac70 | 957 | |
0f0b8dcd DJ |
958 | #if defined (SIGQUIT) || defined (SIGHUP) |
959 | /* Called by the event loop in response to a SIGQUIT or an | |
960 | ignored SIGHUP. */ | |
c5aa993b | 961 | static void |
c2c6d25f | 962 | async_do_nothing (gdb_client_data arg) |
b5a0ac70 SS |
963 | { |
964 | /* Empty function body. */ | |
965 | } | |
0f0b8dcd | 966 | #endif |
b5a0ac70 SS |
967 | |
968 | #ifdef SIGHUP | |
969 | /* Tell the event loop what to do if SIGHUP is received. | |
970 | See event-signal.c. */ | |
c5aa993b | 971 | static void |
fba45db2 | 972 | handle_sighup (int sig) |
b5a0ac70 | 973 | { |
0f71a2f6 | 974 | mark_async_signal_handler_wrapper (sighup_token); |
b5a0ac70 SS |
975 | signal (sig, handle_sighup); |
976 | } | |
977 | ||
0f71a2f6 | 978 | /* Called by the event loop to process a SIGHUP */ |
c5aa993b | 979 | static void |
c2c6d25f | 980 | async_disconnect (gdb_client_data arg) |
b5a0ac70 SS |
981 | { |
982 | catch_errors (quit_cover, NULL, | |
983 | "Could not kill the program being debugged", | |
984 | RETURN_MASK_ALL); | |
985 | signal (SIGHUP, SIG_DFL); /*FIXME: ??????????? */ | |
986 | kill (getpid (), SIGHUP); | |
987 | } | |
988 | #endif | |
989 | ||
0f71a2f6 | 990 | #ifdef STOP_SIGNAL |
c5aa993b | 991 | void |
c2c6d25f | 992 | handle_stop_sig (int sig) |
0f71a2f6 | 993 | { |
c5aa993b JM |
994 | mark_async_signal_handler_wrapper (sigtstp_token); |
995 | signal (sig, handle_stop_sig); | |
0f71a2f6 JM |
996 | } |
997 | ||
998 | static void | |
c2c6d25f | 999 | async_stop_sig (gdb_client_data arg) |
0f71a2f6 | 1000 | { |
c5aa993b | 1001 | char *prompt = get_prompt (); |
0f71a2f6 JM |
1002 | #if STOP_SIGNAL == SIGTSTP |
1003 | signal (SIGTSTP, SIG_DFL); | |
2acceee2 JM |
1004 | #if HAVE_SIGPROCMASK |
1005 | { | |
1006 | sigset_t zero; | |
46711df8 | 1007 | |
2acceee2 JM |
1008 | sigemptyset (&zero); |
1009 | sigprocmask (SIG_SETMASK, &zero, 0); | |
1010 | } | |
46711df8 | 1011 | #elif HAVE_SIGSETMASK |
0f71a2f6 | 1012 | sigsetmask (0); |
2acceee2 | 1013 | #endif |
0f71a2f6 JM |
1014 | kill (getpid (), SIGTSTP); |
1015 | signal (SIGTSTP, handle_stop_sig); | |
1016 | #else | |
1017 | signal (STOP_SIGNAL, handle_stop_sig); | |
1018 | #endif | |
1019 | printf_unfiltered ("%s", prompt); | |
1020 | gdb_flush (gdb_stdout); | |
1021 | ||
1022 | /* Forget about any previous command -- null line now will do nothing. */ | |
1023 | dont_repeat (); | |
1024 | } | |
1025 | #endif /* STOP_SIGNAL */ | |
1026 | ||
b5a0ac70 SS |
1027 | /* Tell the event loop what to do if SIGFPE is received. |
1028 | See event-signal.c. */ | |
c5aa993b | 1029 | static void |
c2c6d25f | 1030 | handle_sigfpe (int sig) |
b5a0ac70 | 1031 | { |
0f71a2f6 | 1032 | mark_async_signal_handler_wrapper (sigfpe_token); |
b5a0ac70 SS |
1033 | signal (sig, handle_sigfpe); |
1034 | } | |
1035 | ||
1036 | /* Event loop will call this functin to process a SIGFPE. */ | |
c5aa993b | 1037 | static void |
c2c6d25f | 1038 | async_float_handler (gdb_client_data arg) |
b5a0ac70 SS |
1039 | { |
1040 | /* This message is based on ANSI C, section 4.7. Note that integer | |
1041 | divide by zero causes this, so "float" is a misnomer. */ | |
8a3fe4f8 | 1042 | error (_("Erroneous arithmetic operation.")); |
b5a0ac70 SS |
1043 | } |
1044 | ||
1045 | /* Tell the event loop what to do if SIGWINCH is received. | |
1046 | See event-signal.c. */ | |
1047 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) | |
c5aa993b | 1048 | static void |
c2c6d25f | 1049 | handle_sigwinch (int sig) |
b5a0ac70 | 1050 | { |
0f71a2f6 | 1051 | mark_async_signal_handler_wrapper (sigwinch_token); |
b5a0ac70 SS |
1052 | signal (sig, handle_sigwinch); |
1053 | } | |
1054 | #endif | |
1055 | \f | |
1056 | ||
1057 | /* Called by do_setshow_command. */ | |
b5a0ac70 | 1058 | void |
c2c6d25f | 1059 | set_async_editing_command (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 SS |
1060 | { |
1061 | change_line_handler (); | |
1062 | } | |
1063 | ||
1064 | /* Called by do_setshow_command. */ | |
b5a0ac70 | 1065 | void |
c2c6d25f | 1066 | set_async_annotation_level (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 SS |
1067 | { |
1068 | change_annotation_level (); | |
1069 | } | |
1070 | ||
1071 | /* Called by do_setshow_command. */ | |
b5a0ac70 | 1072 | void |
c2c6d25f | 1073 | set_async_prompt (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 SS |
1074 | { |
1075 | PROMPT (0) = savestring (new_async_prompt, strlen (new_async_prompt)); | |
1076 | } | |
1077 | ||
0f71a2f6 JM |
1078 | /* Set things up for readline to be invoked via the alternate |
1079 | interface, i.e. via a callback function (rl_callback_read_char), | |
c5aa993b | 1080 | and hook up instream to the event loop. */ |
0f71a2f6 | 1081 | void |
cee6ddeb | 1082 | gdb_setup_readline (void) |
0f71a2f6 | 1083 | { |
362646f5 AC |
1084 | /* This function is a noop for the sync case. The assumption is |
1085 | that the sync setup is ALL done in gdb_init, and we would only | |
1086 | mess it up here. The sync stuff should really go away over | |
1087 | time. */ | |
1a088d06 AS |
1088 | if (!batch_silent) |
1089 | gdb_stdout = stdio_fileopen (stdout); | |
362646f5 AC |
1090 | gdb_stderr = stdio_fileopen (stderr); |
1091 | gdb_stdlog = gdb_stderr; /* for moment */ | |
1092 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
1093 | ||
1094 | /* If the input stream is connected to a terminal, turn on | |
1095 | editing. */ | |
1096 | if (ISATTY (instream)) | |
9e0b60a8 | 1097 | { |
362646f5 AC |
1098 | /* Tell gdb that we will be using the readline library. This |
1099 | could be overwritten by a command in .gdbinit like 'set | |
1100 | editing on' or 'off'. */ | |
1101 | async_command_editing_p = 1; | |
c5201926 | 1102 | |
362646f5 AC |
1103 | /* When a character is detected on instream by select or poll, |
1104 | readline will be invoked via this callback function. */ | |
1105 | call_readline = rl_callback_read_char_wrapper; | |
9e0b60a8 | 1106 | } |
362646f5 AC |
1107 | else |
1108 | { | |
1109 | async_command_editing_p = 0; | |
1110 | call_readline = gdb_readline2; | |
1111 | } | |
1112 | ||
1113 | /* When readline has read an end-of-line character, it passes the | |
1114 | complete line to gdb for processing. command_line_handler is the | |
1115 | function that does this. */ | |
1116 | input_handler = command_line_handler; | |
1117 | ||
1118 | /* Tell readline to use the same input stream that gdb uses. */ | |
1119 | rl_instream = instream; | |
1120 | ||
1121 | /* Get a file descriptor for the input stream, so that we can | |
1122 | register it with the event loop. */ | |
1123 | input_fd = fileno (instream); | |
1124 | ||
1125 | /* Now we need to create the event sources for the input file | |
1126 | descriptor. */ | |
1127 | /* At this point in time, this is the only event source that we | |
1128 | register with the even loop. Another source is going to be the | |
1129 | target program (inferior), but that must be registered only when | |
1130 | it actually exists (I.e. after we say 'run' or after we connect | |
1131 | to a remote target. */ | |
1132 | add_file_handler (input_fd, stdin_event_handler, 0); | |
0f71a2f6 | 1133 | } |
cee6ddeb | 1134 | |
7d5b6fdd EZ |
1135 | /* Disable command input through the standard CLI channels. Used in |
1136 | the suspend proc for interpreters that use the standard gdb readline | |
1137 | interface, like the cli & the mi. */ | |
1138 | void | |
1139 | gdb_disable_readline (void) | |
1140 | { | |
362646f5 AC |
1141 | /* FIXME - It is too heavyweight to delete and remake these every |
1142 | time you run an interpreter that needs readline. It is probably | |
1143 | better to have the interpreters cache these, which in turn means | |
1144 | that this needs to be moved into interpreter specific code. */ | |
7d5b6fdd EZ |
1145 | |
1146 | #if 0 | |
362646f5 AC |
1147 | ui_file_delete (gdb_stdout); |
1148 | ui_file_delete (gdb_stderr); | |
1149 | gdb_stdlog = NULL; | |
1150 | gdb_stdtarg = NULL; | |
7d5b6fdd EZ |
1151 | #endif |
1152 | ||
362646f5 AC |
1153 | rl_callback_handler_remove (); |
1154 | delete_file_handler (input_fd); | |
7d5b6fdd | 1155 | } |