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" |
8ea051c5 | 35 | #include "gdbthread.h" |
b5a0ac70 | 36 | |
104c1213 JM |
37 | /* For dont_repeat() */ |
38 | #include "gdbcmd.h" | |
39 | ||
b5a0ac70 | 40 | /* readline include files */ |
dbda9972 AC |
41 | #include "readline/readline.h" |
42 | #include "readline/history.h" | |
b5a0ac70 SS |
43 | |
44 | /* readline defines this. */ | |
45 | #undef savestring | |
46 | ||
c2c6d25f JM |
47 | static void rl_callback_read_char_wrapper (gdb_client_data client_data); |
48 | static void command_line_handler (char *rl); | |
c2c6d25f JM |
49 | static void change_line_handler (void); |
50 | static void change_annotation_level (void); | |
51 | static void command_handler (char *command); | |
b5a0ac70 SS |
52 | |
53 | /* Signal handlers. */ | |
6d318c73 | 54 | #ifdef SIGQUIT |
c2c6d25f | 55 | static void handle_sigquit (int sig); |
6d318c73 | 56 | #endif |
0f0b8dcd | 57 | #ifdef SIGHUP |
c2c6d25f | 58 | static void handle_sighup (int sig); |
0f0b8dcd | 59 | #endif |
c2c6d25f | 60 | static void handle_sigfpe (int sig); |
d4f3574e | 61 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
c2c6d25f | 62 | static void handle_sigwinch (int sig); |
0f71a2f6 | 63 | #endif |
b5a0ac70 SS |
64 | |
65 | /* Functions to be invoked by the event loop in response to | |
66 | signals. */ | |
0f0b8dcd | 67 | #if defined (SIGQUIT) || defined (SIGHUP) |
c2c6d25f | 68 | static void async_do_nothing (gdb_client_data); |
0f0b8dcd DJ |
69 | #endif |
70 | #ifdef SIGHUP | |
c2c6d25f | 71 | static void async_disconnect (gdb_client_data); |
0f0b8dcd | 72 | #endif |
c2c6d25f | 73 | static void async_float_handler (gdb_client_data); |
0f0b8dcd | 74 | #ifdef STOP_SIGNAL |
c2c6d25f | 75 | static void async_stop_sig (gdb_client_data); |
0f0b8dcd | 76 | #endif |
b5a0ac70 | 77 | |
b5a0ac70 SS |
78 | /* Readline offers an alternate interface, via callback |
79 | functions. These are all included in the file callback.c in the | |
80 | readline distribution. This file provides (mainly) a function, which | |
81 | the event loop uses as callback (i.e. event handler) whenever an event | |
82 | is detected on the standard input file descriptor. | |
83 | readline_callback_read_char is called (by the GDB event loop) whenever | |
84 | there is a new character ready on the input stream. This function | |
85 | incrementally builds a buffer internal to readline where it | |
86 | accumulates the line read up to the point of invocation. In the | |
87 | special case in which the character read is newline, the function | |
88 | invokes a GDB supplied callback routine, which does the processing of | |
89 | a full command line. This latter routine is the asynchronous analog | |
90 | of the old command_line_input in gdb. Instead of invoking (and waiting | |
91 | for) readline to read the command line and pass it back to | |
92 | command_loop for processing, the new command_line_handler function has | |
93 | the command line already available as its parameter. INPUT_HANDLER is | |
94 | to be set to the function that readline will invoke when a complete | |
95 | line of input is ready. CALL_READLINE is to be set to the function | |
96 | that readline offers as callback to the event_loop. */ | |
97 | ||
c2c6d25f JM |
98 | void (*input_handler) (char *); |
99 | void (*call_readline) (gdb_client_data); | |
b5a0ac70 SS |
100 | |
101 | /* Important variables for the event loop. */ | |
102 | ||
103 | /* This is used to determine if GDB is using the readline library or | |
104 | its own simplified form of readline. It is used by the asynchronous | |
0f71a2f6 | 105 | form of the set editing command. |
392a587b | 106 | ezannoni: as of 1999-04-29 I expect that this |
b5a0ac70 SS |
107 | variable will not be used after gdb is changed to use the event |
108 | loop as default engine, and event-top.c is merged into top.c. */ | |
109 | int async_command_editing_p; | |
110 | ||
111 | /* This variable contains the new prompt that the user sets with the | |
112 | set prompt command. */ | |
113 | char *new_async_prompt; | |
114 | ||
115 | /* This is the annotation suffix that will be used when the | |
116 | annotation_level is 2. */ | |
117 | char *async_annotation_suffix; | |
118 | ||
104c1213 JM |
119 | /* This is used to display the notification of the completion of an |
120 | asynchronous execution command. */ | |
121 | int exec_done_display_p = 0; | |
122 | ||
b5a0ac70 SS |
123 | /* This is the file descriptor for the input stream that GDB uses to |
124 | read commands from. */ | |
125 | int input_fd; | |
126 | ||
127 | /* This is the prompt stack. Prompts will be pushed on the stack as | |
128 | needed by the different 'kinds' of user inputs GDB is asking | |
129 | for. See event-loop.h. */ | |
130 | struct prompts the_prompts; | |
131 | ||
132 | /* signal handling variables */ | |
133 | /* Each of these is a pointer to a function that the event loop will | |
134 | invoke if the corresponding signal has received. The real signal | |
135 | handlers mark these functions as ready to be executed and the event | |
136 | loop, in a later iteration, calls them. See the function | |
137 | invoke_async_signal_handler. */ | |
97bb9d91 | 138 | void *sigint_token; |
b5a0ac70 | 139 | #ifdef SIGHUP |
97bb9d91 | 140 | void *sighup_token; |
b5a0ac70 | 141 | #endif |
6d318c73 | 142 | #ifdef SIGQUIT |
97bb9d91 | 143 | void *sigquit_token; |
6d318c73 | 144 | #endif |
97bb9d91 | 145 | void *sigfpe_token; |
b5a0ac70 | 146 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
97bb9d91 | 147 | void *sigwinch_token; |
b5a0ac70 | 148 | #endif |
0f71a2f6 | 149 | #ifdef STOP_SIGNAL |
97bb9d91 | 150 | void *sigtstp_token; |
0f71a2f6 JM |
151 | #endif |
152 | ||
b5a0ac70 SS |
153 | /* Structure to save a partially entered command. This is used when |
154 | the user types '\' at the end of a command line. This is necessary | |
155 | because each line of input is handled by a different call to | |
156 | command_line_handler, and normally there is no state retained | |
157 | between different calls. */ | |
158 | int more_to_come = 0; | |
159 | ||
160 | struct readline_input_state | |
161 | { | |
162 | char *linebuffer; | |
163 | char *linebuffer_ptr; | |
164 | } | |
165 | readline_input_state; | |
467d8519 TT |
166 | |
167 | /* This hook is called by rl_callback_read_char_wrapper after each | |
168 | character is processed. */ | |
169 | void (*after_char_processing_hook) (); | |
b5a0ac70 SS |
170 | \f |
171 | ||
701f9765 | 172 | /* Wrapper function for calling into the readline library. The event |
c2c6d25f JM |
173 | loop expects the callback function to have a paramter, while readline |
174 | expects none. */ | |
175 | static void | |
176 | rl_callback_read_char_wrapper (gdb_client_data client_data) | |
177 | { | |
178 | rl_callback_read_char (); | |
467d8519 TT |
179 | if (after_char_processing_hook) |
180 | (*after_char_processing_hook) (); | |
c2c6d25f JM |
181 | } |
182 | ||
b5a0ac70 | 183 | /* Initialize all the necessary variables, start the event loop, |
085dd6e6 | 184 | register readline, and stdin, start the loop. */ |
b5a0ac70 | 185 | void |
c2c6d25f | 186 | cli_command_loop (void) |
b5a0ac70 | 187 | { |
0f71a2f6 JM |
188 | /* If we are using readline, set things up and display the first |
189 | prompt, otherwise just print the prompt. */ | |
190 | if (async_command_editing_p) | |
191 | { | |
2ed23f5f MS |
192 | int length; |
193 | char *a_prompt; | |
194 | char *gdb_prompt = get_prompt (); | |
195 | ||
0f71a2f6 | 196 | /* Tell readline what the prompt to display is and what function it |
c5aa993b JM |
197 | will need to call after a whole line is read. This also displays |
198 | the first prompt. */ | |
2ed23f5f MS |
199 | length = strlen (PREFIX (0)) |
200 | + strlen (gdb_prompt) + strlen (SUFFIX (0)) + 1; | |
201 | a_prompt = (char *) alloca (length); | |
0f71a2f6 | 202 | strcpy (a_prompt, PREFIX (0)); |
9e0b60a8 | 203 | strcat (a_prompt, gdb_prompt); |
0f71a2f6 JM |
204 | strcat (a_prompt, SUFFIX (0)); |
205 | rl_callback_handler_install (a_prompt, input_handler); | |
206 | } | |
207 | else | |
208 | display_gdb_prompt (0); | |
b5a0ac70 | 209 | |
085dd6e6 JM |
210 | /* Now it's time to start the event loop. */ |
211 | start_event_loop (); | |
b5a0ac70 SS |
212 | } |
213 | ||
214 | /* Change the function to be invoked every time there is a character | |
215 | ready on stdin. This is used when the user sets the editing off, | |
216 | therefore bypassing readline, and letting gdb handle the input | |
217 | itself, via gdb_readline2. Also it is used in the opposite case in | |
218 | which the user sets editing on again, by restoring readline | |
219 | handling of the input. */ | |
392a587b | 220 | static void |
c2c6d25f | 221 | change_line_handler (void) |
b5a0ac70 | 222 | { |
c2c6d25f JM |
223 | /* NOTE: this operates on input_fd, not instream. If we are reading |
224 | commands from a file, instream will point to the file. However in | |
225 | async mode, we always read commands from a file with editing | |
226 | off. This means that the 'set editing on/off' will have effect | |
227 | only on the interactive session. */ | |
228 | ||
b5a0ac70 SS |
229 | if (async_command_editing_p) |
230 | { | |
231 | /* Turn on editing by using readline. */ | |
c2c6d25f | 232 | call_readline = rl_callback_read_char_wrapper; |
0f71a2f6 | 233 | input_handler = command_line_handler; |
b5a0ac70 SS |
234 | } |
235 | else | |
236 | { | |
237 | /* Turn off editing by using gdb_readline2. */ | |
238 | rl_callback_handler_remove (); | |
239 | call_readline = gdb_readline2; | |
0f71a2f6 JM |
240 | |
241 | /* Set up the command handler as well, in case we are called as | |
c5aa993b | 242 | first thing from .gdbinit. */ |
0f71a2f6 | 243 | input_handler = command_line_handler; |
b5a0ac70 | 244 | } |
b5a0ac70 SS |
245 | } |
246 | ||
247 | /* Displays the prompt. The prompt that is displayed is the current | |
248 | top of the prompt stack, if the argument NEW_PROMPT is | |
249 | 0. Otherwise, it displays whatever NEW_PROMPT is. This is used | |
250 | after each gdb command has completed, and in the following cases: | |
0f71a2f6 JM |
251 | 1. when the user enters a command line which is ended by '\' |
252 | indicating that the command will continue on the next line. | |
b5a0ac70 | 253 | In that case the prompt that is displayed is the empty string. |
0f71a2f6 JM |
254 | 2. When the user is entering 'commands' for a breakpoint, or |
255 | actions for a tracepoint. In this case the prompt will be '>' | |
256 | 3. Other???? | |
b5a0ac70 SS |
257 | FIXME: 2. & 3. not implemented yet for async. */ |
258 | void | |
c2c6d25f | 259 | display_gdb_prompt (char *new_prompt) |
b5a0ac70 SS |
260 | { |
261 | int prompt_length = 0; | |
c5aa993b | 262 | char *gdb_prompt = get_prompt (); |
b5a0ac70 | 263 | |
16026cd7 AS |
264 | /* Reset the nesting depth used when trace-commands is set. */ |
265 | reset_command_nest_depth (); | |
266 | ||
4389a95a AC |
267 | /* Each interpreter has its own rules on displaying the command |
268 | prompt. */ | |
269 | if (!current_interp_display_prompt_p ()) | |
fb40c209 | 270 | return; |
fb40c209 | 271 | |
8ea051c5 | 272 | if (sync_execution && is_running (inferior_ptid)) |
adf40b2e JM |
273 | { |
274 | /* This is to trick readline into not trying to display the | |
6426a772 JM |
275 | prompt. Even though we display the prompt using this |
276 | function, readline still tries to do its own display if we | |
277 | don't call rl_callback_handler_install and | |
278 | rl_callback_handler_remove (which readline detects because a | |
279 | global variable is not set). If readline did that, it could | |
280 | mess up gdb signal handlers for SIGINT. Readline assumes | |
281 | that between calls to rl_set_signals and rl_clear_signals gdb | |
282 | doesn't do anything with the signal handlers. Well, that's | |
283 | not the case, because when the target executes we change the | |
284 | SIGINT signal handler. If we allowed readline to display the | |
285 | prompt, the signal handler change would happen exactly | |
286 | between the calls to the above two functions. | |
287 | Calling rl_callback_handler_remove(), does the job. */ | |
adf40b2e JM |
288 | |
289 | rl_callback_handler_remove (); | |
290 | return; | |
291 | } | |
292 | ||
b5a0ac70 SS |
293 | if (!new_prompt) |
294 | { | |
295 | /* Just use the top of the prompt stack. */ | |
296 | prompt_length = strlen (PREFIX (0)) + | |
297 | strlen (SUFFIX (0)) + | |
9e0b60a8 | 298 | strlen (gdb_prompt) + 1; |
b5a0ac70 SS |
299 | |
300 | new_prompt = (char *) alloca (prompt_length); | |
301 | ||
302 | /* Prefix needs to have new line at end. */ | |
303 | strcpy (new_prompt, PREFIX (0)); | |
9e0b60a8 | 304 | strcat (new_prompt, gdb_prompt); |
b5a0ac70 SS |
305 | /* Suffix needs to have a new line at end and \032 \032 at |
306 | beginning. */ | |
307 | strcat (new_prompt, SUFFIX (0)); | |
308 | } | |
309 | ||
310 | if (async_command_editing_p) | |
311 | { | |
312 | rl_callback_handler_remove (); | |
313 | rl_callback_handler_install (new_prompt, input_handler); | |
314 | } | |
adf40b2e | 315 | /* new_prompt at this point can be the top of the stack or the one passed in */ |
b5a0ac70 SS |
316 | else if (new_prompt) |
317 | { | |
318 | /* Don't use a _filtered function here. It causes the assumed | |
319 | character position to be off, since the newline we read from | |
320 | the user is not accounted for. */ | |
321 | fputs_unfiltered (new_prompt, gdb_stdout); | |
b5a0ac70 SS |
322 | gdb_flush (gdb_stdout); |
323 | } | |
324 | } | |
325 | ||
326 | /* Used when the user requests a different annotation level, with | |
327 | 'set annotate'. It pushes a new prompt (with prefix and suffix) on top | |
328 | of the prompt stack, if the annotation level desired is 2, otherwise | |
329 | it pops the top of the prompt stack when we want the annotation level | |
adf40b2e | 330 | to be the normal ones (1 or 0). */ |
392a587b | 331 | static void |
c2c6d25f | 332 | change_annotation_level (void) |
b5a0ac70 SS |
333 | { |
334 | char *prefix, *suffix; | |
335 | ||
336 | if (!PREFIX (0) || !PROMPT (0) || !SUFFIX (0)) | |
337 | { | |
338 | /* The prompt stack has not been initialized to "", we are | |
339 | using gdb w/o the --async switch */ | |
8a3fe4f8 | 340 | warning (_("Command has same effect as set annotate")); |
b5a0ac70 SS |
341 | return; |
342 | } | |
343 | ||
344 | if (annotation_level > 1) | |
345 | { | |
346 | if (!strcmp (PREFIX (0), "") && !strcmp (SUFFIX (0), "")) | |
347 | { | |
348 | /* Push a new prompt if the previous annotation_level was not >1. */ | |
349 | prefix = (char *) alloca (strlen (async_annotation_suffix) + 10); | |
350 | strcpy (prefix, "\n\032\032pre-"); | |
351 | strcat (prefix, async_annotation_suffix); | |
352 | strcat (prefix, "\n"); | |
353 | ||
354 | suffix = (char *) alloca (strlen (async_annotation_suffix) + 6); | |
355 | strcpy (suffix, "\n\032\032"); | |
356 | strcat (suffix, async_annotation_suffix); | |
357 | strcat (suffix, "\n"); | |
358 | ||
359 | push_prompt (prefix, (char *) 0, suffix); | |
360 | } | |
361 | } | |
362 | else | |
363 | { | |
364 | if (strcmp (PREFIX (0), "") && strcmp (SUFFIX (0), "")) | |
365 | { | |
366 | /* Pop the top of the stack, we are going back to annotation < 1. */ | |
367 | pop_prompt (); | |
368 | } | |
369 | } | |
370 | } | |
371 | ||
372 | /* Pushes a new prompt on the prompt stack. Each prompt has three | |
373 | parts: prefix, prompt, suffix. Usually prefix and suffix are empty | |
374 | strings, except when the annotation level is 2. Memory is allocated | |
375 | within savestring for the new prompt. */ | |
43ff13b4 | 376 | void |
c2c6d25f | 377 | push_prompt (char *prefix, char *prompt, char *suffix) |
b5a0ac70 SS |
378 | { |
379 | the_prompts.top++; | |
380 | PREFIX (0) = savestring (prefix, strlen (prefix)); | |
381 | ||
43ff13b4 JM |
382 | /* Note that this function is used by the set annotate 2 |
383 | command. This is why we take care of saving the old prompt | |
384 | in case a new one is not specified. */ | |
b5a0ac70 SS |
385 | if (prompt) |
386 | PROMPT (0) = savestring (prompt, strlen (prompt)); | |
387 | else | |
388 | PROMPT (0) = savestring (PROMPT (-1), strlen (PROMPT (-1))); | |
389 | ||
390 | SUFFIX (0) = savestring (suffix, strlen (suffix)); | |
391 | } | |
392 | ||
393 | /* Pops the top of the prompt stack, and frees the memory allocated for it. */ | |
43ff13b4 | 394 | void |
c2c6d25f | 395 | pop_prompt (void) |
b5a0ac70 | 396 | { |
43ff13b4 JM |
397 | /* If we are not during a 'synchronous' execution command, in which |
398 | case, the top prompt would be empty. */ | |
399 | if (strcmp (PROMPT (0), "")) | |
400 | /* This is for the case in which the prompt is set while the | |
401 | annotation level is 2. The top prompt will be changed, but when | |
402 | we return to annotation level < 2, we want that new prompt to be | |
403 | in effect, until the user does another 'set prompt'. */ | |
404 | if (strcmp (PROMPT (0), PROMPT (-1))) | |
405 | { | |
b8c9b27d | 406 | xfree (PROMPT (-1)); |
43ff13b4 JM |
407 | PROMPT (-1) = savestring (PROMPT (0), strlen (PROMPT (0))); |
408 | } | |
b5a0ac70 | 409 | |
b8c9b27d KB |
410 | xfree (PREFIX (0)); |
411 | xfree (PROMPT (0)); | |
412 | xfree (SUFFIX (0)); | |
b5a0ac70 SS |
413 | the_prompts.top--; |
414 | } | |
c2c6d25f JM |
415 | |
416 | /* When there is an event ready on the stdin file desriptor, instead | |
417 | of calling readline directly throught the callback function, or | |
418 | instead of calling gdb_readline2, give gdb a chance to detect | |
419 | errors and do something. */ | |
420 | void | |
2acceee2 | 421 | stdin_event_handler (int error, gdb_client_data client_data) |
c2c6d25f JM |
422 | { |
423 | if (error) | |
424 | { | |
a3f17187 | 425 | printf_unfiltered (_("error detected on stdin\n")); |
2acceee2 | 426 | delete_file_handler (input_fd); |
c2c6d25f | 427 | discard_all_continuations (); |
604ead4a | 428 | discard_all_intermediate_continuations (); |
c2c6d25f | 429 | /* If stdin died, we may as well kill gdb. */ |
c5394b80 | 430 | quit_command ((char *) 0, stdin == instream); |
c2c6d25f JM |
431 | } |
432 | else | |
6426a772 | 433 | (*call_readline) (client_data); |
c2c6d25f JM |
434 | } |
435 | ||
6426a772 JM |
436 | /* Re-enable stdin after the end of an execution command in |
437 | synchronous mode, or after an error from the target, and we aborted | |
438 | the exec operation. */ | |
439 | ||
440 | void | |
712af3be | 441 | async_enable_stdin (void) |
6426a772 | 442 | { |
32c1e744 VP |
443 | if (sync_execution) |
444 | { | |
445 | /* See NOTE in async_disable_stdin() */ | |
446 | /* FIXME: cagney/1999-09-27: Call this before clearing | |
447 | sync_execution. Current target_terminal_ours() implementations | |
448 | check for sync_execution before switching the terminal. */ | |
449 | target_terminal_ours (); | |
450 | pop_prompt (); | |
451 | sync_execution = 0; | |
452 | } | |
6426a772 JM |
453 | } |
454 | ||
455 | /* Disable reads from stdin (the console) marking the command as | |
456 | synchronous. */ | |
457 | ||
458 | void | |
459 | async_disable_stdin (void) | |
460 | { | |
461 | sync_execution = 1; | |
462 | push_prompt ("", "", ""); | |
463 | /* FIXME: cagney/1999-09-27: At present this call is technically | |
464 | redundant since infcmd.c and infrun.c both already call | |
465 | target_terminal_inferior(). As the terminal handling (in | |
466 | sync/async mode) is refined, the duplicate calls can be | |
467 | eliminated (Here or in infcmd.c/infrun.c). */ | |
468 | target_terminal_inferior (); | |
6426a772 | 469 | } |
b5a0ac70 | 470 | \f |
6426a772 | 471 | |
b5a0ac70 SS |
472 | /* Handles a gdb command. This function is called by |
473 | command_line_handler, which has processed one or more input lines | |
474 | into COMMAND. */ | |
392a587b | 475 | /* NOTE: 1999-04-30 This is the asynchronous version of the command_loop |
b5a0ac70 SS |
476 | function. The command_loop function will be obsolete when we |
477 | switch to use the event loop at every execution of gdb. */ | |
392a587b | 478 | static void |
c2c6d25f | 479 | command_handler (char *command) |
b5a0ac70 SS |
480 | { |
481 | struct cleanup *old_chain; | |
482 | int stdin_is_tty = ISATTY (stdin); | |
483 | long time_at_cmd_start; | |
484 | #ifdef HAVE_SBRK | |
485 | long space_at_cmd_start = 0; | |
486 | #endif | |
487 | extern int display_time; | |
488 | extern int display_space; | |
489 | ||
b5a0ac70 SS |
490 | quit_flag = 0; |
491 | if (instream == stdin && stdin_is_tty) | |
492 | reinitialize_more_filter (); | |
e2273c6d | 493 | old_chain = make_cleanup (null_cleanup, 0); |
b5a0ac70 | 494 | |
b5a0ac70 SS |
495 | /* If readline returned a NULL command, it means that the |
496 | connection with the terminal is gone. This happens at the | |
497 | end of a testsuite run, after Expect has hung up | |
498 | but GDB is still alive. In such a case, we just quit gdb | |
499 | killing the inferior program too. */ | |
500 | if (command == 0) | |
fa3fd85b AS |
501 | { |
502 | printf_unfiltered ("quit\n"); | |
503 | execute_command ("quit", stdin == instream); | |
504 | } | |
b5a0ac70 SS |
505 | |
506 | time_at_cmd_start = get_run_time (); | |
507 | ||
508 | if (display_space) | |
509 | { | |
510 | #ifdef HAVE_SBRK | |
b5a0ac70 | 511 | char *lim = (char *) sbrk (0); |
6dd77b81 | 512 | space_at_cmd_start = lim - lim_at_start; |
b5a0ac70 SS |
513 | #endif |
514 | } | |
515 | ||
516 | execute_command (command, instream == stdin); | |
c5aa993b | 517 | |
43ff13b4 JM |
518 | /* Do any commands attached to breakpoint we stopped at. Only if we |
519 | are always running synchronously. Or if we have just executed a | |
520 | command that doesn't start the target. */ | |
0d6431e2 | 521 | if (!target_can_async_p () || is_stopped (inferior_ptid)) |
43ff13b4 JM |
522 | { |
523 | bpstat_do_actions (&stop_bpstat); | |
524 | do_cleanups (old_chain); | |
c5aa993b | 525 | |
43ff13b4 JM |
526 | if (display_time) |
527 | { | |
528 | long cmd_time = get_run_time () - time_at_cmd_start; | |
529 | ||
a3f17187 | 530 | printf_unfiltered (_("Command execution time: %ld.%06ld\n"), |
43ff13b4 JM |
531 | cmd_time / 1000000, cmd_time % 1000000); |
532 | } | |
533 | ||
534 | if (display_space) | |
535 | { | |
536 | #ifdef HAVE_SBRK | |
43ff13b4 | 537 | char *lim = (char *) sbrk (0); |
6dd77b81 | 538 | long space_now = lim - lim_at_start; |
43ff13b4 JM |
539 | long space_diff = space_now - space_at_cmd_start; |
540 | ||
a3f17187 | 541 | printf_unfiltered (_("Space used: %ld (%c%ld for this command)\n"), |
43ff13b4 JM |
542 | space_now, |
543 | (space_diff >= 0 ? '+' : '-'), | |
544 | space_diff); | |
545 | #endif | |
546 | } | |
547 | } | |
548 | } | |
549 | ||
b5a0ac70 SS |
550 | /* Handle a complete line of input. This is called by the callback |
551 | mechanism within the readline library. Deal with incomplete commands | |
552 | as well, by saving the partial input in a global buffer. */ | |
553 | ||
392a587b | 554 | /* NOTE: 1999-04-30 This is the asynchronous version of the |
b5a0ac70 SS |
555 | command_line_input function. command_line_input will become |
556 | obsolete once we use the event loop as the default mechanism in | |
557 | GDB. */ | |
558 | static void | |
c2c6d25f | 559 | command_line_handler (char *rl) |
b5a0ac70 SS |
560 | { |
561 | static char *linebuffer = 0; | |
562 | static unsigned linelength = 0; | |
52f0bd74 | 563 | char *p; |
b5a0ac70 | 564 | char *p1; |
b5a0ac70 SS |
565 | extern char *line; |
566 | extern int linesize; | |
567 | char *nline; | |
568 | char got_eof = 0; | |
569 | ||
570 | ||
571 | int repeat = (instream == stdin); | |
572 | ||
573 | if (annotation_level > 1 && instream == stdin) | |
574 | { | |
a3f17187 | 575 | printf_unfiltered (("\n\032\032post-")); |
306d9ac5 | 576 | puts_unfiltered (async_annotation_suffix); |
a3f17187 | 577 | printf_unfiltered (("\n")); |
b5a0ac70 SS |
578 | } |
579 | ||
580 | if (linebuffer == 0) | |
581 | { | |
582 | linelength = 80; | |
583 | linebuffer = (char *) xmalloc (linelength); | |
584 | } | |
585 | ||
586 | p = linebuffer; | |
587 | ||
588 | if (more_to_come) | |
589 | { | |
590 | strcpy (linebuffer, readline_input_state.linebuffer); | |
591 | p = readline_input_state.linebuffer_ptr; | |
b8c9b27d | 592 | xfree (readline_input_state.linebuffer); |
b5a0ac70 | 593 | more_to_come = 0; |
adf40b2e | 594 | pop_prompt (); |
b5a0ac70 SS |
595 | } |
596 | ||
597 | #ifdef STOP_SIGNAL | |
598 | if (job_control) | |
0f71a2f6 | 599 | signal (STOP_SIGNAL, handle_stop_sig); |
b5a0ac70 SS |
600 | #endif |
601 | ||
602 | /* Make sure that all output has been output. Some machines may let | |
603 | you get away with leaving out some of the gdb_flush, but not all. */ | |
604 | wrap_here (""); | |
605 | gdb_flush (gdb_stdout); | |
606 | gdb_flush (gdb_stderr); | |
607 | ||
608 | if (source_file_name != NULL) | |
637537d0 | 609 | ++source_line_number; |
b5a0ac70 SS |
610 | |
611 | /* If we are in this case, then command_handler will call quit | |
612 | and exit from gdb. */ | |
613 | if (!rl || rl == (char *) EOF) | |
614 | { | |
615 | got_eof = 1; | |
616 | command_handler (0); | |
40742ab6 | 617 | return; /* Lint. */ |
b5a0ac70 SS |
618 | } |
619 | if (strlen (rl) + 1 + (p - linebuffer) > linelength) | |
620 | { | |
621 | linelength = strlen (rl) + 1 + (p - linebuffer); | |
622 | nline = (char *) xrealloc (linebuffer, linelength); | |
623 | p += nline - linebuffer; | |
624 | linebuffer = nline; | |
625 | } | |
626 | p1 = rl; | |
627 | /* Copy line. Don't copy null at end. (Leaves line alone | |
628 | if this was just a newline) */ | |
629 | while (*p1) | |
630 | *p++ = *p1++; | |
631 | ||
b8c9b27d | 632 | xfree (rl); /* Allocated in readline. */ |
b5a0ac70 | 633 | |
4dd79c29 | 634 | if (p > linebuffer && *(p - 1) == '\\') |
b5a0ac70 | 635 | { |
b5a0ac70 SS |
636 | p--; /* Put on top of '\'. */ |
637 | ||
d96429cd AS |
638 | readline_input_state.linebuffer = savestring (linebuffer, |
639 | strlen (linebuffer)); | |
640 | readline_input_state.linebuffer_ptr = p; | |
641 | ||
642 | /* We will not invoke a execute_command if there is more | |
643 | input expected to complete the command. So, we need to | |
644 | print an empty prompt here. */ | |
645 | more_to_come = 1; | |
646 | push_prompt ("", "", ""); | |
647 | display_gdb_prompt (0); | |
648 | return; | |
b5a0ac70 SS |
649 | } |
650 | ||
651 | #ifdef STOP_SIGNAL | |
652 | if (job_control) | |
653 | signal (STOP_SIGNAL, SIG_DFL); | |
654 | #endif | |
655 | ||
656 | #define SERVER_COMMAND_LENGTH 7 | |
657 | server_command = | |
658 | (p - linebuffer > SERVER_COMMAND_LENGTH) | |
bf896cb0 | 659 | && strncmp (linebuffer, "server ", SERVER_COMMAND_LENGTH) == 0; |
b5a0ac70 SS |
660 | if (server_command) |
661 | { | |
662 | /* Note that we don't set `line'. Between this and the check in | |
663 | dont_repeat, this insures that repeating will still do the | |
664 | right thing. */ | |
665 | *p = '\0'; | |
666 | command_handler (linebuffer + SERVER_COMMAND_LENGTH); | |
667 | display_gdb_prompt (0); | |
668 | return; | |
669 | } | |
670 | ||
671 | /* Do history expansion if that is wished. */ | |
672 | if (history_expansion_p && instream == stdin | |
673 | && ISATTY (instream)) | |
674 | { | |
675 | char *history_value; | |
676 | int expanded; | |
677 | ||
678 | *p = '\0'; /* Insert null now. */ | |
679 | expanded = history_expand (linebuffer, &history_value); | |
680 | if (expanded) | |
681 | { | |
682 | /* Print the changes. */ | |
683 | printf_unfiltered ("%s\n", history_value); | |
684 | ||
685 | /* If there was an error, call this function again. */ | |
686 | if (expanded < 0) | |
687 | { | |
b8c9b27d | 688 | xfree (history_value); |
b5a0ac70 SS |
689 | return; |
690 | } | |
691 | if (strlen (history_value) > linelength) | |
692 | { | |
693 | linelength = strlen (history_value) + 1; | |
694 | linebuffer = (char *) xrealloc (linebuffer, linelength); | |
695 | } | |
696 | strcpy (linebuffer, history_value); | |
697 | p = linebuffer + strlen (linebuffer); | |
b5a0ac70 | 698 | } |
f5b73fbb | 699 | xfree (history_value); |
b5a0ac70 SS |
700 | } |
701 | ||
702 | /* If we just got an empty line, and that is supposed | |
703 | to repeat the previous command, return the value in the | |
704 | global buffer. */ | |
705 | if (repeat && p == linebuffer && *p != '\\') | |
706 | { | |
707 | command_handler (line); | |
708 | display_gdb_prompt (0); | |
709 | return; | |
710 | } | |
711 | ||
712 | for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++); | |
713 | if (repeat && !*p1) | |
714 | { | |
715 | command_handler (line); | |
716 | display_gdb_prompt (0); | |
717 | return; | |
718 | } | |
719 | ||
720 | *p = 0; | |
721 | ||
722 | /* Add line to history if appropriate. */ | |
723 | if (instream == stdin | |
724 | && ISATTY (stdin) && *linebuffer) | |
725 | add_history (linebuffer); | |
726 | ||
727 | /* Note: lines consisting solely of comments are added to the command | |
728 | history. This is useful when you type a command, and then | |
729 | realize you don't want to execute it quite yet. You can comment | |
730 | out the command and then later fetch it from the value history | |
731 | and remove the '#'. The kill ring is probably better, but some | |
732 | people are in the habit of commenting things out. */ | |
733 | if (*p1 == '#') | |
734 | *p1 = '\0'; /* Found a comment. */ | |
735 | ||
736 | /* Save into global buffer if appropriate. */ | |
737 | if (repeat) | |
738 | { | |
739 | if (linelength > linesize) | |
740 | { | |
741 | line = xrealloc (line, linelength); | |
742 | linesize = linelength; | |
743 | } | |
744 | strcpy (line, linebuffer); | |
745 | if (!more_to_come) | |
746 | { | |
747 | command_handler (line); | |
748 | display_gdb_prompt (0); | |
749 | } | |
750 | return; | |
751 | } | |
752 | ||
753 | command_handler (linebuffer); | |
754 | display_gdb_prompt (0); | |
755 | return; | |
756 | } | |
757 | ||
758 | /* Does reading of input from terminal w/o the editing features | |
759 | provided by the readline library. */ | |
760 | ||
392a587b | 761 | /* NOTE: 1999-04-30 Asynchronous version of gdb_readline. gdb_readline |
b5a0ac70 SS |
762 | will become obsolete when the event loop is made the default |
763 | execution for gdb. */ | |
085dd6e6 | 764 | void |
c2c6d25f | 765 | gdb_readline2 (gdb_client_data client_data) |
b5a0ac70 SS |
766 | { |
767 | int c; | |
768 | char *result; | |
769 | int input_index = 0; | |
770 | int result_size = 80; | |
7be570e7 JM |
771 | static int done_once = 0; |
772 | ||
773 | /* Unbuffer the input stream, so that, later on, the calls to fgetc | |
774 | fetch only one char at the time from the stream. The fgetc's will | |
775 | get up to the first newline, but there may be more chars in the | |
776 | stream after '\n'. If we buffer the input and fgetc drains the | |
777 | stream, getting stuff beyond the newline as well, a select, done | |
778 | afterwards will not trigger. */ | |
779 | if (!done_once && !ISATTY (instream)) | |
780 | { | |
781 | setbuf (instream, NULL); | |
782 | done_once = 1; | |
783 | } | |
b5a0ac70 SS |
784 | |
785 | result = (char *) xmalloc (result_size); | |
786 | ||
787 | /* We still need the while loop here, even though it would seem | |
788 | obvious to invoke gdb_readline2 at every character entered. If | |
789 | not using the readline library, the terminal is in cooked mode, | |
790 | which sends the characters all at once. Poll will notice that the | |
791 | input fd has changed state only after enter is pressed. At this | |
792 | point we still need to fetch all the chars entered. */ | |
793 | ||
794 | while (1) | |
795 | { | |
796 | /* Read from stdin if we are executing a user defined command. | |
797 | This is the right thing for prompt_for_continue, at least. */ | |
798 | c = fgetc (instream ? instream : stdin); | |
799 | ||
800 | if (c == EOF) | |
801 | { | |
802 | if (input_index > 0) | |
803 | /* The last line does not end with a newline. Return it, and | |
804 | if we are called again fgetc will still return EOF and | |
805 | we'll return NULL then. */ | |
806 | break; | |
b8c9b27d | 807 | xfree (result); |
0f71a2f6 | 808 | (*input_handler) (0); |
13ce7133 | 809 | return; |
b5a0ac70 SS |
810 | } |
811 | ||
812 | if (c == '\n') | |
b5a0ac70 SS |
813 | { |
814 | if (input_index > 0 && result[input_index - 1] == '\r') | |
815 | input_index--; | |
816 | break; | |
817 | } | |
b5a0ac70 SS |
818 | |
819 | result[input_index++] = c; | |
820 | while (input_index >= result_size) | |
821 | { | |
822 | result_size *= 2; | |
823 | result = (char *) xrealloc (result, result_size); | |
824 | } | |
825 | } | |
826 | ||
827 | result[input_index++] = '\0'; | |
0f71a2f6 | 828 | (*input_handler) (result); |
b5a0ac70 SS |
829 | } |
830 | \f | |
831 | ||
832 | /* Initialization of signal handlers and tokens. There is a function | |
833 | handle_sig* for each of the signals GDB cares about. Specifically: | |
834 | SIGINT, SIGFPE, SIGQUIT, SIGTSTP, SIGHUP, SIGWINCH. These | |
835 | functions are the actual signal handlers associated to the signals | |
836 | via calls to signal(). The only job for these functions is to | |
837 | enqueue the appropriate event/procedure with the event loop. Such | |
838 | procedures are the old signal handlers. The event loop will take | |
839 | care of invoking the queued procedures to perform the usual tasks | |
840 | associated with the reception of the signal. */ | |
392a587b | 841 | /* NOTE: 1999-04-30 This is the asynchronous version of init_signals. |
b5a0ac70 SS |
842 | init_signals will become obsolete as we move to have to event loop |
843 | as the default for gdb. */ | |
844 | void | |
c2c6d25f | 845 | async_init_signals (void) |
c5aa993b | 846 | { |
b5a0ac70 SS |
847 | signal (SIGINT, handle_sigint); |
848 | sigint_token = | |
0f71a2f6 | 849 | create_async_signal_handler (async_request_quit, NULL); |
a7266fef | 850 | signal (SIGTERM, handle_sigterm); |
b5a0ac70 SS |
851 | |
852 | /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed | |
853 | to the inferior and breakpoints will be ignored. */ | |
854 | #ifdef SIGTRAP | |
855 | signal (SIGTRAP, SIG_DFL); | |
856 | #endif | |
857 | ||
6d318c73 | 858 | #ifdef SIGQUIT |
b5a0ac70 SS |
859 | /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get |
860 | passed to the inferior, which we don't want. It would be | |
861 | possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but | |
862 | on BSD4.3 systems using vfork, that can affect the | |
863 | GDB process as well as the inferior (the signal handling tables | |
864 | might be in memory, shared between the two). Since we establish | |
865 | a handler for SIGQUIT, when we call exec it will set the signal | |
866 | to SIG_DFL for us. */ | |
867 | signal (SIGQUIT, handle_sigquit); | |
868 | sigquit_token = | |
0f71a2f6 | 869 | create_async_signal_handler (async_do_nothing, NULL); |
6d318c73 | 870 | #endif |
b5a0ac70 SS |
871 | #ifdef SIGHUP |
872 | if (signal (SIGHUP, handle_sighup) != SIG_IGN) | |
873 | sighup_token = | |
0f71a2f6 | 874 | create_async_signal_handler (async_disconnect, NULL); |
b5a0ac70 SS |
875 | else |
876 | sighup_token = | |
0f71a2f6 | 877 | create_async_signal_handler (async_do_nothing, NULL); |
b5a0ac70 SS |
878 | #endif |
879 | signal (SIGFPE, handle_sigfpe); | |
880 | sigfpe_token = | |
0f71a2f6 | 881 | create_async_signal_handler (async_float_handler, NULL); |
b5a0ac70 SS |
882 | |
883 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) | |
884 | signal (SIGWINCH, handle_sigwinch); | |
885 | sigwinch_token = | |
0f71a2f6 | 886 | create_async_signal_handler (SIGWINCH_HANDLER, NULL); |
b5a0ac70 | 887 | #endif |
0f71a2f6 JM |
888 | #ifdef STOP_SIGNAL |
889 | sigtstp_token = | |
890 | create_async_signal_handler (async_stop_sig, NULL); | |
891 | #endif | |
892 | ||
893 | } | |
894 | ||
c5aa993b | 895 | void |
97bb9d91 | 896 | mark_async_signal_handler_wrapper (void *token) |
0f71a2f6 | 897 | { |
c2c6d25f | 898 | mark_async_signal_handler ((struct async_signal_handler *) token); |
b5a0ac70 SS |
899 | } |
900 | ||
901 | /* Tell the event loop what to do if SIGINT is received. | |
902 | See event-signal.c. */ | |
c5aa993b | 903 | void |
c2c6d25f | 904 | handle_sigint (int sig) |
b5a0ac70 SS |
905 | { |
906 | signal (sig, handle_sigint); | |
907 | ||
5f960e00 FF |
908 | /* We could be running in a loop reading in symfiles or something so |
909 | it may be quite a while before we get back to the event loop. So | |
910 | set quit_flag to 1 here. Then if QUIT is called before we get to | |
911 | the event loop, we will unwind as expected. */ | |
912 | ||
913 | quit_flag = 1; | |
914 | ||
b5a0ac70 SS |
915 | /* If immediate_quit is set, we go ahead and process the SIGINT right |
916 | away, even if we usually would defer this to the event loop. The | |
917 | assumption here is that it is safe to process ^C immediately if | |
918 | immediate_quit is set. If we didn't, SIGINT would be really | |
919 | processed only the next time through the event loop. To get to | |
920 | that point, though, the command that we want to interrupt needs to | |
b803fb0f DJ |
921 | finish first, which is unacceptable. If immediate quit is not set, |
922 | we process SIGINT the next time through the loop, which is fine. */ | |
923 | gdb_call_async_signal_handler (sigint_token, immediate_quit); | |
b5a0ac70 SS |
924 | } |
925 | ||
a7266fef AS |
926 | /* Quit GDB if SIGTERM is received. |
927 | GDB would quit anyway, but this way it will clean up properly. */ | |
928 | void | |
929 | handle_sigterm (int sig) | |
930 | { | |
931 | signal (sig, handle_sigterm); | |
932 | quit_force ((char *) 0, stdin == instream); | |
933 | } | |
934 | ||
b5a0ac70 | 935 | /* Do the quit. All the checks have been done by the caller. */ |
c5aa993b | 936 | void |
c2c6d25f | 937 | async_request_quit (gdb_client_data arg) |
b5a0ac70 | 938 | { |
5f960e00 | 939 | /* If the quit_flag has gotten reset back to 0 by the time we get |
4ac94eda FF |
940 | back here, that means that an exception was thrown to unwind the |
941 | current command before we got back to the event loop. So there | |
942 | is no reason to call quit again here, unless immediate_quit is | |
943 | set.*/ | |
5f960e00 | 944 | |
4ac94eda FF |
945 | if (quit_flag || immediate_quit) |
946 | quit (); | |
b5a0ac70 SS |
947 | } |
948 | ||
6d318c73 | 949 | #ifdef SIGQUIT |
b5a0ac70 SS |
950 | /* Tell the event loop what to do if SIGQUIT is received. |
951 | See event-signal.c. */ | |
c5aa993b | 952 | static void |
c2c6d25f | 953 | handle_sigquit (int sig) |
b5a0ac70 | 954 | { |
0f71a2f6 | 955 | mark_async_signal_handler_wrapper (sigquit_token); |
b5a0ac70 SS |
956 | signal (sig, handle_sigquit); |
957 | } | |
6d318c73 | 958 | #endif |
b5a0ac70 | 959 | |
0f0b8dcd DJ |
960 | #if defined (SIGQUIT) || defined (SIGHUP) |
961 | /* Called by the event loop in response to a SIGQUIT or an | |
962 | ignored SIGHUP. */ | |
c5aa993b | 963 | static void |
c2c6d25f | 964 | async_do_nothing (gdb_client_data arg) |
b5a0ac70 SS |
965 | { |
966 | /* Empty function body. */ | |
967 | } | |
0f0b8dcd | 968 | #endif |
b5a0ac70 SS |
969 | |
970 | #ifdef SIGHUP | |
971 | /* Tell the event loop what to do if SIGHUP is received. | |
972 | See event-signal.c. */ | |
c5aa993b | 973 | static void |
fba45db2 | 974 | handle_sighup (int sig) |
b5a0ac70 | 975 | { |
0f71a2f6 | 976 | mark_async_signal_handler_wrapper (sighup_token); |
b5a0ac70 SS |
977 | signal (sig, handle_sighup); |
978 | } | |
979 | ||
0f71a2f6 | 980 | /* Called by the event loop to process a SIGHUP */ |
c5aa993b | 981 | static void |
c2c6d25f | 982 | async_disconnect (gdb_client_data arg) |
b5a0ac70 SS |
983 | { |
984 | catch_errors (quit_cover, NULL, | |
985 | "Could not kill the program being debugged", | |
986 | RETURN_MASK_ALL); | |
987 | signal (SIGHUP, SIG_DFL); /*FIXME: ??????????? */ | |
988 | kill (getpid (), SIGHUP); | |
989 | } | |
990 | #endif | |
991 | ||
0f71a2f6 | 992 | #ifdef STOP_SIGNAL |
c5aa993b | 993 | void |
c2c6d25f | 994 | handle_stop_sig (int sig) |
0f71a2f6 | 995 | { |
c5aa993b JM |
996 | mark_async_signal_handler_wrapper (sigtstp_token); |
997 | signal (sig, handle_stop_sig); | |
0f71a2f6 JM |
998 | } |
999 | ||
1000 | static void | |
c2c6d25f | 1001 | async_stop_sig (gdb_client_data arg) |
0f71a2f6 | 1002 | { |
c5aa993b | 1003 | char *prompt = get_prompt (); |
0f71a2f6 JM |
1004 | #if STOP_SIGNAL == SIGTSTP |
1005 | signal (SIGTSTP, SIG_DFL); | |
2acceee2 JM |
1006 | #if HAVE_SIGPROCMASK |
1007 | { | |
1008 | sigset_t zero; | |
46711df8 | 1009 | |
2acceee2 JM |
1010 | sigemptyset (&zero); |
1011 | sigprocmask (SIG_SETMASK, &zero, 0); | |
1012 | } | |
46711df8 | 1013 | #elif HAVE_SIGSETMASK |
0f71a2f6 | 1014 | sigsetmask (0); |
2acceee2 | 1015 | #endif |
0f71a2f6 JM |
1016 | kill (getpid (), SIGTSTP); |
1017 | signal (SIGTSTP, handle_stop_sig); | |
1018 | #else | |
1019 | signal (STOP_SIGNAL, handle_stop_sig); | |
1020 | #endif | |
1021 | printf_unfiltered ("%s", prompt); | |
1022 | gdb_flush (gdb_stdout); | |
1023 | ||
1024 | /* Forget about any previous command -- null line now will do nothing. */ | |
1025 | dont_repeat (); | |
1026 | } | |
1027 | #endif /* STOP_SIGNAL */ | |
1028 | ||
b5a0ac70 SS |
1029 | /* Tell the event loop what to do if SIGFPE is received. |
1030 | See event-signal.c. */ | |
c5aa993b | 1031 | static void |
c2c6d25f | 1032 | handle_sigfpe (int sig) |
b5a0ac70 | 1033 | { |
0f71a2f6 | 1034 | mark_async_signal_handler_wrapper (sigfpe_token); |
b5a0ac70 SS |
1035 | signal (sig, handle_sigfpe); |
1036 | } | |
1037 | ||
1038 | /* Event loop will call this functin to process a SIGFPE. */ | |
c5aa993b | 1039 | static void |
c2c6d25f | 1040 | async_float_handler (gdb_client_data arg) |
b5a0ac70 SS |
1041 | { |
1042 | /* This message is based on ANSI C, section 4.7. Note that integer | |
1043 | divide by zero causes this, so "float" is a misnomer. */ | |
8a3fe4f8 | 1044 | error (_("Erroneous arithmetic operation.")); |
b5a0ac70 SS |
1045 | } |
1046 | ||
1047 | /* Tell the event loop what to do if SIGWINCH is received. | |
1048 | See event-signal.c. */ | |
1049 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) | |
c5aa993b | 1050 | static void |
c2c6d25f | 1051 | handle_sigwinch (int sig) |
b5a0ac70 | 1052 | { |
0f71a2f6 | 1053 | mark_async_signal_handler_wrapper (sigwinch_token); |
b5a0ac70 SS |
1054 | signal (sig, handle_sigwinch); |
1055 | } | |
1056 | #endif | |
1057 | \f | |
1058 | ||
1059 | /* Called by do_setshow_command. */ | |
b5a0ac70 | 1060 | void |
c2c6d25f | 1061 | set_async_editing_command (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 SS |
1062 | { |
1063 | change_line_handler (); | |
1064 | } | |
1065 | ||
1066 | /* Called by do_setshow_command. */ | |
b5a0ac70 | 1067 | void |
c2c6d25f | 1068 | set_async_annotation_level (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 SS |
1069 | { |
1070 | change_annotation_level (); | |
1071 | } | |
1072 | ||
1073 | /* Called by do_setshow_command. */ | |
b5a0ac70 | 1074 | void |
c2c6d25f | 1075 | set_async_prompt (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 SS |
1076 | { |
1077 | PROMPT (0) = savestring (new_async_prompt, strlen (new_async_prompt)); | |
1078 | } | |
1079 | ||
0f71a2f6 JM |
1080 | /* Set things up for readline to be invoked via the alternate |
1081 | interface, i.e. via a callback function (rl_callback_read_char), | |
c5aa993b | 1082 | and hook up instream to the event loop. */ |
0f71a2f6 | 1083 | void |
cee6ddeb | 1084 | gdb_setup_readline (void) |
0f71a2f6 | 1085 | { |
362646f5 AC |
1086 | /* This function is a noop for the sync case. The assumption is |
1087 | that the sync setup is ALL done in gdb_init, and we would only | |
1088 | mess it up here. The sync stuff should really go away over | |
1089 | time. */ | |
1a088d06 AS |
1090 | if (!batch_silent) |
1091 | gdb_stdout = stdio_fileopen (stdout); | |
362646f5 AC |
1092 | gdb_stderr = stdio_fileopen (stderr); |
1093 | gdb_stdlog = gdb_stderr; /* for moment */ | |
1094 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
1095 | ||
1096 | /* If the input stream is connected to a terminal, turn on | |
1097 | editing. */ | |
1098 | if (ISATTY (instream)) | |
9e0b60a8 | 1099 | { |
362646f5 AC |
1100 | /* Tell gdb that we will be using the readline library. This |
1101 | could be overwritten by a command in .gdbinit like 'set | |
1102 | editing on' or 'off'. */ | |
1103 | async_command_editing_p = 1; | |
c5201926 | 1104 | |
362646f5 AC |
1105 | /* When a character is detected on instream by select or poll, |
1106 | readline will be invoked via this callback function. */ | |
1107 | call_readline = rl_callback_read_char_wrapper; | |
9e0b60a8 | 1108 | } |
362646f5 AC |
1109 | else |
1110 | { | |
1111 | async_command_editing_p = 0; | |
1112 | call_readline = gdb_readline2; | |
1113 | } | |
1114 | ||
1115 | /* When readline has read an end-of-line character, it passes the | |
1116 | complete line to gdb for processing. command_line_handler is the | |
1117 | function that does this. */ | |
1118 | input_handler = command_line_handler; | |
1119 | ||
1120 | /* Tell readline to use the same input stream that gdb uses. */ | |
1121 | rl_instream = instream; | |
1122 | ||
1123 | /* Get a file descriptor for the input stream, so that we can | |
1124 | register it with the event loop. */ | |
1125 | input_fd = fileno (instream); | |
1126 | ||
1127 | /* Now we need to create the event sources for the input file | |
1128 | descriptor. */ | |
1129 | /* At this point in time, this is the only event source that we | |
1130 | register with the even loop. Another source is going to be the | |
1131 | target program (inferior), but that must be registered only when | |
1132 | it actually exists (I.e. after we say 'run' or after we connect | |
1133 | to a remote target. */ | |
1134 | add_file_handler (input_fd, stdin_event_handler, 0); | |
0f71a2f6 | 1135 | } |
cee6ddeb | 1136 | |
7d5b6fdd EZ |
1137 | /* Disable command input through the standard CLI channels. Used in |
1138 | the suspend proc for interpreters that use the standard gdb readline | |
1139 | interface, like the cli & the mi. */ | |
1140 | void | |
1141 | gdb_disable_readline (void) | |
1142 | { | |
362646f5 AC |
1143 | /* FIXME - It is too heavyweight to delete and remake these every |
1144 | time you run an interpreter that needs readline. It is probably | |
1145 | better to have the interpreters cache these, which in turn means | |
1146 | that this needs to be moved into interpreter specific code. */ | |
7d5b6fdd EZ |
1147 | |
1148 | #if 0 | |
362646f5 AC |
1149 | ui_file_delete (gdb_stdout); |
1150 | ui_file_delete (gdb_stderr); | |
1151 | gdb_stdlog = NULL; | |
1152 | gdb_stdtarg = NULL; | |
7d5b6fdd EZ |
1153 | #endif |
1154 | ||
362646f5 AC |
1155 | rl_callback_handler_remove (); |
1156 | delete_file_handler (input_fd); | |
7d5b6fdd | 1157 | } |