Commit | Line | Data |
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b5a0ac70 | 1 | /* Top level stuff for GDB, the GNU debugger. |
2ede629f | 2 | Copyright 1999, 2000, 2001, 2002, 2004 Free Software Foundation, Inc. |
b5a0ac70 SS |
3 | Written by Elena Zannoni <ezannoni@cygnus.com> of Cygnus Solutions. |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
c5aa993b JM |
19 | Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
b5a0ac70 SS |
21 | |
22 | #include "defs.h" | |
0f71a2f6 | 23 | #include "top.h" |
b5a0ac70 | 24 | #include "inferior.h" |
e514a9d6 | 25 | #include "target.h" |
c5aa993b | 26 | #include "terminal.h" /* for job_control */ |
9e0b60a8 | 27 | #include "event-loop.h" |
c2c6d25f | 28 | #include "event-top.h" |
4389a95a | 29 | #include "interps.h" |
042be3a9 | 30 | #include <signal.h> |
60250e8b | 31 | #include "exceptions.h" |
b5a0ac70 | 32 | |
104c1213 JM |
33 | /* For dont_repeat() */ |
34 | #include "gdbcmd.h" | |
35 | ||
b5a0ac70 | 36 | /* readline include files */ |
dbda9972 AC |
37 | #include "readline/readline.h" |
38 | #include "readline/history.h" | |
b5a0ac70 SS |
39 | |
40 | /* readline defines this. */ | |
41 | #undef savestring | |
42 | ||
c2c6d25f JM |
43 | static void rl_callback_read_char_wrapper (gdb_client_data client_data); |
44 | static void command_line_handler (char *rl); | |
45 | static void command_line_handler_continuation (struct continuation_arg *arg); | |
46 | static void change_line_handler (void); | |
47 | static void change_annotation_level (void); | |
48 | static void command_handler (char *command); | |
c2c6d25f JM |
49 | static void async_do_nothing (gdb_client_data arg); |
50 | static void async_disconnect (gdb_client_data arg); | |
51 | static void async_stop_sig (gdb_client_data arg); | |
52 | static void async_float_handler (gdb_client_data arg); | |
b5a0ac70 SS |
53 | |
54 | /* Signal handlers. */ | |
c2c6d25f JM |
55 | static void handle_sigquit (int sig); |
56 | static void handle_sighup (int sig); | |
57 | static void handle_sigfpe (int sig); | |
d4f3574e | 58 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
c2c6d25f | 59 | static void handle_sigwinch (int sig); |
0f71a2f6 | 60 | #endif |
b5a0ac70 SS |
61 | |
62 | /* Functions to be invoked by the event loop in response to | |
63 | signals. */ | |
c2c6d25f JM |
64 | static void async_do_nothing (gdb_client_data); |
65 | static void async_disconnect (gdb_client_data); | |
66 | static void async_float_handler (gdb_client_data); | |
67 | static void async_stop_sig (gdb_client_data); | |
b5a0ac70 | 68 | |
b5a0ac70 SS |
69 | /* Readline offers an alternate interface, via callback |
70 | functions. These are all included in the file callback.c in the | |
71 | readline distribution. This file provides (mainly) a function, which | |
72 | the event loop uses as callback (i.e. event handler) whenever an event | |
73 | is detected on the standard input file descriptor. | |
74 | readline_callback_read_char is called (by the GDB event loop) whenever | |
75 | there is a new character ready on the input stream. This function | |
76 | incrementally builds a buffer internal to readline where it | |
77 | accumulates the line read up to the point of invocation. In the | |
78 | special case in which the character read is newline, the function | |
79 | invokes a GDB supplied callback routine, which does the processing of | |
80 | a full command line. This latter routine is the asynchronous analog | |
81 | of the old command_line_input in gdb. Instead of invoking (and waiting | |
82 | for) readline to read the command line and pass it back to | |
83 | command_loop for processing, the new command_line_handler function has | |
84 | the command line already available as its parameter. INPUT_HANDLER is | |
85 | to be set to the function that readline will invoke when a complete | |
86 | line of input is ready. CALL_READLINE is to be set to the function | |
87 | that readline offers as callback to the event_loop. */ | |
88 | ||
c2c6d25f JM |
89 | void (*input_handler) (char *); |
90 | void (*call_readline) (gdb_client_data); | |
b5a0ac70 SS |
91 | |
92 | /* Important variables for the event loop. */ | |
93 | ||
94 | /* This is used to determine if GDB is using the readline library or | |
95 | its own simplified form of readline. It is used by the asynchronous | |
0f71a2f6 | 96 | form of the set editing command. |
392a587b | 97 | ezannoni: as of 1999-04-29 I expect that this |
b5a0ac70 SS |
98 | variable will not be used after gdb is changed to use the event |
99 | loop as default engine, and event-top.c is merged into top.c. */ | |
100 | int async_command_editing_p; | |
101 | ||
102 | /* This variable contains the new prompt that the user sets with the | |
103 | set prompt command. */ | |
104 | char *new_async_prompt; | |
105 | ||
106 | /* This is the annotation suffix that will be used when the | |
107 | annotation_level is 2. */ | |
108 | char *async_annotation_suffix; | |
109 | ||
104c1213 JM |
110 | /* This is used to display the notification of the completion of an |
111 | asynchronous execution command. */ | |
112 | int exec_done_display_p = 0; | |
113 | ||
b5a0ac70 SS |
114 | /* This is the file descriptor for the input stream that GDB uses to |
115 | read commands from. */ | |
116 | int input_fd; | |
117 | ||
118 | /* This is the prompt stack. Prompts will be pushed on the stack as | |
119 | needed by the different 'kinds' of user inputs GDB is asking | |
120 | for. See event-loop.h. */ | |
121 | struct prompts the_prompts; | |
122 | ||
123 | /* signal handling variables */ | |
124 | /* Each of these is a pointer to a function that the event loop will | |
125 | invoke if the corresponding signal has received. The real signal | |
126 | handlers mark these functions as ready to be executed and the event | |
127 | loop, in a later iteration, calls them. See the function | |
128 | invoke_async_signal_handler. */ | |
97bb9d91 | 129 | void *sigint_token; |
b5a0ac70 | 130 | #ifdef SIGHUP |
97bb9d91 | 131 | void *sighup_token; |
b5a0ac70 | 132 | #endif |
97bb9d91 EZ |
133 | void *sigquit_token; |
134 | void *sigfpe_token; | |
b5a0ac70 | 135 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
97bb9d91 | 136 | void *sigwinch_token; |
b5a0ac70 | 137 | #endif |
0f71a2f6 | 138 | #ifdef STOP_SIGNAL |
97bb9d91 | 139 | void *sigtstp_token; |
0f71a2f6 JM |
140 | #endif |
141 | ||
b5a0ac70 SS |
142 | /* Structure to save a partially entered command. This is used when |
143 | the user types '\' at the end of a command line. This is necessary | |
144 | because each line of input is handled by a different call to | |
145 | command_line_handler, and normally there is no state retained | |
146 | between different calls. */ | |
147 | int more_to_come = 0; | |
148 | ||
149 | struct readline_input_state | |
150 | { | |
151 | char *linebuffer; | |
152 | char *linebuffer_ptr; | |
153 | } | |
154 | readline_input_state; | |
467d8519 TT |
155 | |
156 | /* This hook is called by rl_callback_read_char_wrapper after each | |
157 | character is processed. */ | |
158 | void (*after_char_processing_hook) (); | |
b5a0ac70 SS |
159 | \f |
160 | ||
701f9765 | 161 | /* Wrapper function for calling into the readline library. The event |
c2c6d25f JM |
162 | loop expects the callback function to have a paramter, while readline |
163 | expects none. */ | |
164 | static void | |
165 | rl_callback_read_char_wrapper (gdb_client_data client_data) | |
166 | { | |
167 | rl_callback_read_char (); | |
467d8519 TT |
168 | if (after_char_processing_hook) |
169 | (*after_char_processing_hook) (); | |
c2c6d25f JM |
170 | } |
171 | ||
b5a0ac70 | 172 | /* Initialize all the necessary variables, start the event loop, |
085dd6e6 | 173 | register readline, and stdin, start the loop. */ |
b5a0ac70 | 174 | void |
c2c6d25f | 175 | cli_command_loop (void) |
b5a0ac70 | 176 | { |
0f71a2f6 JM |
177 | int length; |
178 | char *a_prompt; | |
9e0b60a8 | 179 | char *gdb_prompt = get_prompt (); |
b5a0ac70 | 180 | |
0f71a2f6 JM |
181 | /* If we are using readline, set things up and display the first |
182 | prompt, otherwise just print the prompt. */ | |
183 | if (async_command_editing_p) | |
184 | { | |
185 | /* Tell readline what the prompt to display is and what function it | |
c5aa993b JM |
186 | will need to call after a whole line is read. This also displays |
187 | the first prompt. */ | |
9e0b60a8 | 188 | length = strlen (PREFIX (0)) + strlen (gdb_prompt) + strlen (SUFFIX (0)) + 1; |
0f71a2f6 JM |
189 | a_prompt = (char *) xmalloc (length); |
190 | strcpy (a_prompt, PREFIX (0)); | |
9e0b60a8 | 191 | strcat (a_prompt, gdb_prompt); |
0f71a2f6 JM |
192 | strcat (a_prompt, SUFFIX (0)); |
193 | rl_callback_handler_install (a_prompt, input_handler); | |
194 | } | |
195 | else | |
196 | display_gdb_prompt (0); | |
b5a0ac70 | 197 | |
085dd6e6 JM |
198 | /* Now it's time to start the event loop. */ |
199 | start_event_loop (); | |
b5a0ac70 SS |
200 | } |
201 | ||
202 | /* Change the function to be invoked every time there is a character | |
203 | ready on stdin. This is used when the user sets the editing off, | |
204 | therefore bypassing readline, and letting gdb handle the input | |
205 | itself, via gdb_readline2. Also it is used in the opposite case in | |
206 | which the user sets editing on again, by restoring readline | |
207 | handling of the input. */ | |
392a587b | 208 | static void |
c2c6d25f | 209 | change_line_handler (void) |
b5a0ac70 | 210 | { |
c2c6d25f JM |
211 | /* NOTE: this operates on input_fd, not instream. If we are reading |
212 | commands from a file, instream will point to the file. However in | |
213 | async mode, we always read commands from a file with editing | |
214 | off. This means that the 'set editing on/off' will have effect | |
215 | only on the interactive session. */ | |
216 | ||
b5a0ac70 SS |
217 | if (async_command_editing_p) |
218 | { | |
219 | /* Turn on editing by using readline. */ | |
c2c6d25f | 220 | call_readline = rl_callback_read_char_wrapper; |
0f71a2f6 | 221 | input_handler = command_line_handler; |
b5a0ac70 SS |
222 | } |
223 | else | |
224 | { | |
225 | /* Turn off editing by using gdb_readline2. */ | |
226 | rl_callback_handler_remove (); | |
227 | call_readline = gdb_readline2; | |
0f71a2f6 JM |
228 | |
229 | /* Set up the command handler as well, in case we are called as | |
c5aa993b | 230 | first thing from .gdbinit. */ |
0f71a2f6 | 231 | input_handler = command_line_handler; |
b5a0ac70 | 232 | } |
b5a0ac70 SS |
233 | } |
234 | ||
235 | /* Displays the prompt. The prompt that is displayed is the current | |
236 | top of the prompt stack, if the argument NEW_PROMPT is | |
237 | 0. Otherwise, it displays whatever NEW_PROMPT is. This is used | |
238 | after each gdb command has completed, and in the following cases: | |
0f71a2f6 JM |
239 | 1. when the user enters a command line which is ended by '\' |
240 | indicating that the command will continue on the next line. | |
b5a0ac70 | 241 | In that case the prompt that is displayed is the empty string. |
0f71a2f6 JM |
242 | 2. When the user is entering 'commands' for a breakpoint, or |
243 | actions for a tracepoint. In this case the prompt will be '>' | |
244 | 3. Other???? | |
b5a0ac70 SS |
245 | FIXME: 2. & 3. not implemented yet for async. */ |
246 | void | |
c2c6d25f | 247 | display_gdb_prompt (char *new_prompt) |
b5a0ac70 SS |
248 | { |
249 | int prompt_length = 0; | |
c5aa993b | 250 | char *gdb_prompt = get_prompt (); |
b5a0ac70 | 251 | |
4389a95a AC |
252 | /* Each interpreter has its own rules on displaying the command |
253 | prompt. */ | |
254 | if (!current_interp_display_prompt_p ()) | |
fb40c209 | 255 | return; |
fb40c209 | 256 | |
6426a772 | 257 | if (target_executing && sync_execution) |
adf40b2e JM |
258 | { |
259 | /* This is to trick readline into not trying to display the | |
6426a772 JM |
260 | prompt. Even though we display the prompt using this |
261 | function, readline still tries to do its own display if we | |
262 | don't call rl_callback_handler_install and | |
263 | rl_callback_handler_remove (which readline detects because a | |
264 | global variable is not set). If readline did that, it could | |
265 | mess up gdb signal handlers for SIGINT. Readline assumes | |
266 | that between calls to rl_set_signals and rl_clear_signals gdb | |
267 | doesn't do anything with the signal handlers. Well, that's | |
268 | not the case, because when the target executes we change the | |
269 | SIGINT signal handler. If we allowed readline to display the | |
270 | prompt, the signal handler change would happen exactly | |
271 | between the calls to the above two functions. | |
272 | Calling rl_callback_handler_remove(), does the job. */ | |
adf40b2e JM |
273 | |
274 | rl_callback_handler_remove (); | |
275 | return; | |
276 | } | |
277 | ||
b5a0ac70 SS |
278 | if (!new_prompt) |
279 | { | |
280 | /* Just use the top of the prompt stack. */ | |
281 | prompt_length = strlen (PREFIX (0)) + | |
282 | strlen (SUFFIX (0)) + | |
9e0b60a8 | 283 | strlen (gdb_prompt) + 1; |
b5a0ac70 SS |
284 | |
285 | new_prompt = (char *) alloca (prompt_length); | |
286 | ||
287 | /* Prefix needs to have new line at end. */ | |
288 | strcpy (new_prompt, PREFIX (0)); | |
9e0b60a8 | 289 | strcat (new_prompt, gdb_prompt); |
b5a0ac70 SS |
290 | /* Suffix needs to have a new line at end and \032 \032 at |
291 | beginning. */ | |
292 | strcat (new_prompt, SUFFIX (0)); | |
293 | } | |
294 | ||
295 | if (async_command_editing_p) | |
296 | { | |
297 | rl_callback_handler_remove (); | |
298 | rl_callback_handler_install (new_prompt, input_handler); | |
299 | } | |
adf40b2e | 300 | /* new_prompt at this point can be the top of the stack or the one passed in */ |
b5a0ac70 SS |
301 | else if (new_prompt) |
302 | { | |
303 | /* Don't use a _filtered function here. It causes the assumed | |
304 | character position to be off, since the newline we read from | |
305 | the user is not accounted for. */ | |
306 | fputs_unfiltered (new_prompt, gdb_stdout); | |
b5a0ac70 SS |
307 | gdb_flush (gdb_stdout); |
308 | } | |
309 | } | |
310 | ||
311 | /* Used when the user requests a different annotation level, with | |
312 | 'set annotate'. It pushes a new prompt (with prefix and suffix) on top | |
313 | of the prompt stack, if the annotation level desired is 2, otherwise | |
314 | it pops the top of the prompt stack when we want the annotation level | |
adf40b2e | 315 | to be the normal ones (1 or 0). */ |
392a587b | 316 | static void |
c2c6d25f | 317 | change_annotation_level (void) |
b5a0ac70 SS |
318 | { |
319 | char *prefix, *suffix; | |
320 | ||
321 | if (!PREFIX (0) || !PROMPT (0) || !SUFFIX (0)) | |
322 | { | |
323 | /* The prompt stack has not been initialized to "", we are | |
324 | using gdb w/o the --async switch */ | |
325 | warning ("Command has same effect as set annotate"); | |
326 | return; | |
327 | } | |
328 | ||
329 | if (annotation_level > 1) | |
330 | { | |
331 | if (!strcmp (PREFIX (0), "") && !strcmp (SUFFIX (0), "")) | |
332 | { | |
333 | /* Push a new prompt if the previous annotation_level was not >1. */ | |
334 | prefix = (char *) alloca (strlen (async_annotation_suffix) + 10); | |
335 | strcpy (prefix, "\n\032\032pre-"); | |
336 | strcat (prefix, async_annotation_suffix); | |
337 | strcat (prefix, "\n"); | |
338 | ||
339 | suffix = (char *) alloca (strlen (async_annotation_suffix) + 6); | |
340 | strcpy (suffix, "\n\032\032"); | |
341 | strcat (suffix, async_annotation_suffix); | |
342 | strcat (suffix, "\n"); | |
343 | ||
344 | push_prompt (prefix, (char *) 0, suffix); | |
345 | } | |
346 | } | |
347 | else | |
348 | { | |
349 | if (strcmp (PREFIX (0), "") && strcmp (SUFFIX (0), "")) | |
350 | { | |
351 | /* Pop the top of the stack, we are going back to annotation < 1. */ | |
352 | pop_prompt (); | |
353 | } | |
354 | } | |
355 | } | |
356 | ||
357 | /* Pushes a new prompt on the prompt stack. Each prompt has three | |
358 | parts: prefix, prompt, suffix. Usually prefix and suffix are empty | |
359 | strings, except when the annotation level is 2. Memory is allocated | |
360 | within savestring for the new prompt. */ | |
43ff13b4 | 361 | void |
c2c6d25f | 362 | push_prompt (char *prefix, char *prompt, char *suffix) |
b5a0ac70 SS |
363 | { |
364 | the_prompts.top++; | |
365 | PREFIX (0) = savestring (prefix, strlen (prefix)); | |
366 | ||
43ff13b4 JM |
367 | /* Note that this function is used by the set annotate 2 |
368 | command. This is why we take care of saving the old prompt | |
369 | in case a new one is not specified. */ | |
b5a0ac70 SS |
370 | if (prompt) |
371 | PROMPT (0) = savestring (prompt, strlen (prompt)); | |
372 | else | |
373 | PROMPT (0) = savestring (PROMPT (-1), strlen (PROMPT (-1))); | |
374 | ||
375 | SUFFIX (0) = savestring (suffix, strlen (suffix)); | |
376 | } | |
377 | ||
378 | /* Pops the top of the prompt stack, and frees the memory allocated for it. */ | |
43ff13b4 | 379 | void |
c2c6d25f | 380 | pop_prompt (void) |
b5a0ac70 | 381 | { |
43ff13b4 JM |
382 | /* If we are not during a 'synchronous' execution command, in which |
383 | case, the top prompt would be empty. */ | |
384 | if (strcmp (PROMPT (0), "")) | |
385 | /* This is for the case in which the prompt is set while the | |
386 | annotation level is 2. The top prompt will be changed, but when | |
387 | we return to annotation level < 2, we want that new prompt to be | |
388 | in effect, until the user does another 'set prompt'. */ | |
389 | if (strcmp (PROMPT (0), PROMPT (-1))) | |
390 | { | |
b8c9b27d | 391 | xfree (PROMPT (-1)); |
43ff13b4 JM |
392 | PROMPT (-1) = savestring (PROMPT (0), strlen (PROMPT (0))); |
393 | } | |
b5a0ac70 | 394 | |
b8c9b27d KB |
395 | xfree (PREFIX (0)); |
396 | xfree (PROMPT (0)); | |
397 | xfree (SUFFIX (0)); | |
b5a0ac70 SS |
398 | the_prompts.top--; |
399 | } | |
c2c6d25f JM |
400 | |
401 | /* When there is an event ready on the stdin file desriptor, instead | |
402 | of calling readline directly throught the callback function, or | |
403 | instead of calling gdb_readline2, give gdb a chance to detect | |
404 | errors and do something. */ | |
405 | void | |
2acceee2 | 406 | stdin_event_handler (int error, gdb_client_data client_data) |
c2c6d25f JM |
407 | { |
408 | if (error) | |
409 | { | |
2acceee2 JM |
410 | printf_unfiltered ("error detected on stdin\n"); |
411 | delete_file_handler (input_fd); | |
c2c6d25f JM |
412 | discard_all_continuations (); |
413 | /* If stdin died, we may as well kill gdb. */ | |
c5394b80 | 414 | quit_command ((char *) 0, stdin == instream); |
c2c6d25f JM |
415 | } |
416 | else | |
6426a772 | 417 | (*call_readline) (client_data); |
c2c6d25f JM |
418 | } |
419 | ||
6426a772 JM |
420 | /* Re-enable stdin after the end of an execution command in |
421 | synchronous mode, or after an error from the target, and we aborted | |
422 | the exec operation. */ | |
423 | ||
424 | void | |
425 | async_enable_stdin (void *dummy) | |
426 | { | |
427 | /* See NOTE in async_disable_stdin() */ | |
428 | /* FIXME: cagney/1999-09-27: Call this before clearing | |
429 | sync_execution. Current target_terminal_ours() implementations | |
430 | check for sync_execution before switching the terminal. */ | |
431 | target_terminal_ours (); | |
432 | pop_prompt (); | |
433 | sync_execution = 0; | |
434 | } | |
435 | ||
436 | /* Disable reads from stdin (the console) marking the command as | |
437 | synchronous. */ | |
438 | ||
439 | void | |
440 | async_disable_stdin (void) | |
441 | { | |
442 | sync_execution = 1; | |
443 | push_prompt ("", "", ""); | |
444 | /* FIXME: cagney/1999-09-27: At present this call is technically | |
445 | redundant since infcmd.c and infrun.c both already call | |
446 | target_terminal_inferior(). As the terminal handling (in | |
447 | sync/async mode) is refined, the duplicate calls can be | |
448 | eliminated (Here or in infcmd.c/infrun.c). */ | |
449 | target_terminal_inferior (); | |
2acceee2 JM |
450 | /* Add the reinstate of stdin to the list of cleanups to be done |
451 | in case the target errors out and dies. These cleanups are also | |
452 | done in case of normal successful termination of the execution | |
453 | command, by complete_execution(). */ | |
6426a772 JM |
454 | make_exec_error_cleanup (async_enable_stdin, NULL); |
455 | } | |
b5a0ac70 | 456 | \f |
6426a772 | 457 | |
b5a0ac70 SS |
458 | /* Handles a gdb command. This function is called by |
459 | command_line_handler, which has processed one or more input lines | |
460 | into COMMAND. */ | |
392a587b | 461 | /* NOTE: 1999-04-30 This is the asynchronous version of the command_loop |
b5a0ac70 SS |
462 | function. The command_loop function will be obsolete when we |
463 | switch to use the event loop at every execution of gdb. */ | |
392a587b | 464 | static void |
c2c6d25f | 465 | command_handler (char *command) |
b5a0ac70 SS |
466 | { |
467 | struct cleanup *old_chain; | |
468 | int stdin_is_tty = ISATTY (stdin); | |
43ff13b4 JM |
469 | struct continuation_arg *arg1; |
470 | struct continuation_arg *arg2; | |
b5a0ac70 SS |
471 | long time_at_cmd_start; |
472 | #ifdef HAVE_SBRK | |
473 | long space_at_cmd_start = 0; | |
474 | #endif | |
475 | extern int display_time; | |
476 | extern int display_space; | |
477 | ||
b5a0ac70 SS |
478 | quit_flag = 0; |
479 | if (instream == stdin && stdin_is_tty) | |
480 | reinitialize_more_filter (); | |
e2273c6d | 481 | old_chain = make_cleanup (null_cleanup, 0); |
b5a0ac70 | 482 | |
b5a0ac70 SS |
483 | /* If readline returned a NULL command, it means that the |
484 | connection with the terminal is gone. This happens at the | |
485 | end of a testsuite run, after Expect has hung up | |
486 | but GDB is still alive. In such a case, we just quit gdb | |
487 | killing the inferior program too. */ | |
488 | if (command == 0) | |
489 | quit_command ((char *) 0, stdin == instream); | |
490 | ||
491 | time_at_cmd_start = get_run_time (); | |
492 | ||
493 | if (display_space) | |
494 | { | |
495 | #ifdef HAVE_SBRK | |
b5a0ac70 | 496 | char *lim = (char *) sbrk (0); |
6dd77b81 | 497 | space_at_cmd_start = lim - lim_at_start; |
b5a0ac70 SS |
498 | #endif |
499 | } | |
500 | ||
501 | execute_command (command, instream == stdin); | |
c5aa993b | 502 | |
43ff13b4 | 503 | /* Set things up for this function to be compete later, once the |
701f9765 | 504 | execution has completed, if we are doing an execution command, |
43ff13b4 | 505 | otherwise, just go ahead and finish. */ |
6426a772 | 506 | if (target_can_async_p () && target_executing) |
43ff13b4 | 507 | { |
c5aa993b | 508 | arg1 = |
43ff13b4 | 509 | (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg)); |
c5aa993b | 510 | arg2 = |
43ff13b4 JM |
511 | (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg)); |
512 | arg1->next = arg2; | |
513 | arg2->next = NULL; | |
87c4a039 EZ |
514 | arg1->data.longint = time_at_cmd_start; |
515 | #ifdef HAVE_SBRK | |
516 | arg2->data.longint = space_at_cmd_start; | |
517 | #endif | |
43ff13b4 JM |
518 | add_continuation (command_line_handler_continuation, arg1); |
519 | } | |
b5a0ac70 | 520 | |
43ff13b4 JM |
521 | /* Do any commands attached to breakpoint we stopped at. Only if we |
522 | are always running synchronously. Or if we have just executed a | |
523 | command that doesn't start the target. */ | |
6426a772 | 524 | if (!target_can_async_p () || !target_executing) |
43ff13b4 JM |
525 | { |
526 | bpstat_do_actions (&stop_bpstat); | |
527 | do_cleanups (old_chain); | |
c5aa993b | 528 | |
43ff13b4 JM |
529 | if (display_time) |
530 | { | |
531 | long cmd_time = get_run_time () - time_at_cmd_start; | |
532 | ||
533 | printf_unfiltered ("Command execution time: %ld.%06ld\n", | |
534 | cmd_time / 1000000, cmd_time % 1000000); | |
535 | } | |
536 | ||
537 | if (display_space) | |
538 | { | |
539 | #ifdef HAVE_SBRK | |
43ff13b4 | 540 | char *lim = (char *) sbrk (0); |
6dd77b81 | 541 | long space_now = lim - lim_at_start; |
43ff13b4 JM |
542 | long space_diff = space_now - space_at_cmd_start; |
543 | ||
544 | printf_unfiltered ("Space used: %ld (%c%ld for this command)\n", | |
545 | space_now, | |
546 | (space_diff >= 0 ? '+' : '-'), | |
547 | space_diff); | |
548 | #endif | |
549 | } | |
550 | } | |
551 | } | |
552 | ||
553 | /* Do any commands attached to breakpoint we stopped at. Only if we | |
554 | are always running synchronously. Or if we have just executed a | |
555 | command that doesn't start the target. */ | |
556 | void | |
c2c6d25f | 557 | command_line_handler_continuation (struct continuation_arg *arg) |
c5aa993b | 558 | { |
43ff13b4 JM |
559 | extern int display_time; |
560 | extern int display_space; | |
561 | ||
57e687d9 MS |
562 | long time_at_cmd_start = arg->data.longint; |
563 | long space_at_cmd_start = arg->next->data.longint; | |
b5a0ac70 | 564 | |
43ff13b4 | 565 | bpstat_do_actions (&stop_bpstat); |
c5aa993b JM |
566 | /*do_cleanups (old_chain); *//*?????FIXME????? */ |
567 | ||
b5a0ac70 SS |
568 | if (display_time) |
569 | { | |
570 | long cmd_time = get_run_time () - time_at_cmd_start; | |
571 | ||
572 | printf_unfiltered ("Command execution time: %ld.%06ld\n", | |
573 | cmd_time / 1000000, cmd_time % 1000000); | |
574 | } | |
b5a0ac70 SS |
575 | if (display_space) |
576 | { | |
577 | #ifdef HAVE_SBRK | |
b5a0ac70 | 578 | char *lim = (char *) sbrk (0); |
6dd77b81 | 579 | long space_now = lim - lim_at_start; |
b5a0ac70 SS |
580 | long space_diff = space_now - space_at_cmd_start; |
581 | ||
582 | printf_unfiltered ("Space used: %ld (%c%ld for this command)\n", | |
583 | space_now, | |
584 | (space_diff >= 0 ? '+' : '-'), | |
585 | space_diff); | |
586 | #endif | |
587 | } | |
588 | } | |
589 | ||
590 | /* Handle a complete line of input. This is called by the callback | |
591 | mechanism within the readline library. Deal with incomplete commands | |
592 | as well, by saving the partial input in a global buffer. */ | |
593 | ||
392a587b | 594 | /* NOTE: 1999-04-30 This is the asynchronous version of the |
b5a0ac70 SS |
595 | command_line_input function. command_line_input will become |
596 | obsolete once we use the event loop as the default mechanism in | |
597 | GDB. */ | |
598 | static void | |
c2c6d25f | 599 | command_line_handler (char *rl) |
b5a0ac70 SS |
600 | { |
601 | static char *linebuffer = 0; | |
602 | static unsigned linelength = 0; | |
52f0bd74 | 603 | char *p; |
b5a0ac70 | 604 | char *p1; |
b5a0ac70 SS |
605 | extern char *line; |
606 | extern int linesize; | |
607 | char *nline; | |
608 | char got_eof = 0; | |
609 | ||
610 | ||
611 | int repeat = (instream == stdin); | |
612 | ||
613 | if (annotation_level > 1 && instream == stdin) | |
614 | { | |
615 | printf_unfiltered ("\n\032\032post-"); | |
306d9ac5 | 616 | puts_unfiltered (async_annotation_suffix); |
b5a0ac70 SS |
617 | printf_unfiltered ("\n"); |
618 | } | |
619 | ||
620 | if (linebuffer == 0) | |
621 | { | |
622 | linelength = 80; | |
623 | linebuffer = (char *) xmalloc (linelength); | |
624 | } | |
625 | ||
626 | p = linebuffer; | |
627 | ||
628 | if (more_to_come) | |
629 | { | |
630 | strcpy (linebuffer, readline_input_state.linebuffer); | |
631 | p = readline_input_state.linebuffer_ptr; | |
b8c9b27d | 632 | xfree (readline_input_state.linebuffer); |
b5a0ac70 | 633 | more_to_come = 0; |
adf40b2e | 634 | pop_prompt (); |
b5a0ac70 SS |
635 | } |
636 | ||
637 | #ifdef STOP_SIGNAL | |
638 | if (job_control) | |
0f71a2f6 | 639 | signal (STOP_SIGNAL, handle_stop_sig); |
b5a0ac70 SS |
640 | #endif |
641 | ||
642 | /* Make sure that all output has been output. Some machines may let | |
643 | you get away with leaving out some of the gdb_flush, but not all. */ | |
644 | wrap_here (""); | |
645 | gdb_flush (gdb_stdout); | |
646 | gdb_flush (gdb_stderr); | |
647 | ||
648 | if (source_file_name != NULL) | |
649 | { | |
650 | ++source_line_number; | |
651 | sprintf (source_error, | |
652 | "%s%s:%d: Error in sourced command file:\n", | |
653 | source_pre_error, | |
654 | source_file_name, | |
655 | source_line_number); | |
656 | error_pre_print = source_error; | |
657 | } | |
658 | ||
659 | /* If we are in this case, then command_handler will call quit | |
660 | and exit from gdb. */ | |
661 | if (!rl || rl == (char *) EOF) | |
662 | { | |
663 | got_eof = 1; | |
664 | command_handler (0); | |
665 | } | |
666 | if (strlen (rl) + 1 + (p - linebuffer) > linelength) | |
667 | { | |
668 | linelength = strlen (rl) + 1 + (p - linebuffer); | |
669 | nline = (char *) xrealloc (linebuffer, linelength); | |
670 | p += nline - linebuffer; | |
671 | linebuffer = nline; | |
672 | } | |
673 | p1 = rl; | |
674 | /* Copy line. Don't copy null at end. (Leaves line alone | |
675 | if this was just a newline) */ | |
676 | while (*p1) | |
677 | *p++ = *p1++; | |
678 | ||
b8c9b27d | 679 | xfree (rl); /* Allocated in readline. */ |
b5a0ac70 | 680 | |
4dd79c29 | 681 | if (p > linebuffer && *(p - 1) == '\\') |
b5a0ac70 | 682 | { |
b5a0ac70 SS |
683 | p--; /* Put on top of '\'. */ |
684 | ||
d96429cd AS |
685 | readline_input_state.linebuffer = savestring (linebuffer, |
686 | strlen (linebuffer)); | |
687 | readline_input_state.linebuffer_ptr = p; | |
688 | ||
689 | /* We will not invoke a execute_command if there is more | |
690 | input expected to complete the command. So, we need to | |
691 | print an empty prompt here. */ | |
692 | more_to_come = 1; | |
693 | push_prompt ("", "", ""); | |
694 | display_gdb_prompt (0); | |
695 | return; | |
b5a0ac70 SS |
696 | } |
697 | ||
698 | #ifdef STOP_SIGNAL | |
699 | if (job_control) | |
700 | signal (STOP_SIGNAL, SIG_DFL); | |
701 | #endif | |
702 | ||
703 | #define SERVER_COMMAND_LENGTH 7 | |
704 | server_command = | |
705 | (p - linebuffer > SERVER_COMMAND_LENGTH) | |
bf896cb0 | 706 | && strncmp (linebuffer, "server ", SERVER_COMMAND_LENGTH) == 0; |
b5a0ac70 SS |
707 | if (server_command) |
708 | { | |
709 | /* Note that we don't set `line'. Between this and the check in | |
710 | dont_repeat, this insures that repeating will still do the | |
711 | right thing. */ | |
712 | *p = '\0'; | |
713 | command_handler (linebuffer + SERVER_COMMAND_LENGTH); | |
714 | display_gdb_prompt (0); | |
715 | return; | |
716 | } | |
717 | ||
718 | /* Do history expansion if that is wished. */ | |
719 | if (history_expansion_p && instream == stdin | |
720 | && ISATTY (instream)) | |
721 | { | |
722 | char *history_value; | |
723 | int expanded; | |
724 | ||
725 | *p = '\0'; /* Insert null now. */ | |
726 | expanded = history_expand (linebuffer, &history_value); | |
727 | if (expanded) | |
728 | { | |
729 | /* Print the changes. */ | |
730 | printf_unfiltered ("%s\n", history_value); | |
731 | ||
732 | /* If there was an error, call this function again. */ | |
733 | if (expanded < 0) | |
734 | { | |
b8c9b27d | 735 | xfree (history_value); |
b5a0ac70 SS |
736 | return; |
737 | } | |
738 | if (strlen (history_value) > linelength) | |
739 | { | |
740 | linelength = strlen (history_value) + 1; | |
741 | linebuffer = (char *) xrealloc (linebuffer, linelength); | |
742 | } | |
743 | strcpy (linebuffer, history_value); | |
744 | p = linebuffer + strlen (linebuffer); | |
b8c9b27d | 745 | xfree (history_value); |
b5a0ac70 SS |
746 | } |
747 | } | |
748 | ||
749 | /* If we just got an empty line, and that is supposed | |
750 | to repeat the previous command, return the value in the | |
751 | global buffer. */ | |
752 | if (repeat && p == linebuffer && *p != '\\') | |
753 | { | |
754 | command_handler (line); | |
755 | display_gdb_prompt (0); | |
756 | return; | |
757 | } | |
758 | ||
759 | for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++); | |
760 | if (repeat && !*p1) | |
761 | { | |
762 | command_handler (line); | |
763 | display_gdb_prompt (0); | |
764 | return; | |
765 | } | |
766 | ||
767 | *p = 0; | |
768 | ||
769 | /* Add line to history if appropriate. */ | |
770 | if (instream == stdin | |
771 | && ISATTY (stdin) && *linebuffer) | |
772 | add_history (linebuffer); | |
773 | ||
774 | /* Note: lines consisting solely of comments are added to the command | |
775 | history. This is useful when you type a command, and then | |
776 | realize you don't want to execute it quite yet. You can comment | |
777 | out the command and then later fetch it from the value history | |
778 | and remove the '#'. The kill ring is probably better, but some | |
779 | people are in the habit of commenting things out. */ | |
780 | if (*p1 == '#') | |
781 | *p1 = '\0'; /* Found a comment. */ | |
782 | ||
783 | /* Save into global buffer if appropriate. */ | |
784 | if (repeat) | |
785 | { | |
786 | if (linelength > linesize) | |
787 | { | |
788 | line = xrealloc (line, linelength); | |
789 | linesize = linelength; | |
790 | } | |
791 | strcpy (line, linebuffer); | |
792 | if (!more_to_come) | |
793 | { | |
794 | command_handler (line); | |
795 | display_gdb_prompt (0); | |
796 | } | |
797 | return; | |
798 | } | |
799 | ||
800 | command_handler (linebuffer); | |
801 | display_gdb_prompt (0); | |
802 | return; | |
803 | } | |
804 | ||
805 | /* Does reading of input from terminal w/o the editing features | |
806 | provided by the readline library. */ | |
807 | ||
392a587b | 808 | /* NOTE: 1999-04-30 Asynchronous version of gdb_readline. gdb_readline |
b5a0ac70 SS |
809 | will become obsolete when the event loop is made the default |
810 | execution for gdb. */ | |
085dd6e6 | 811 | void |
c2c6d25f | 812 | gdb_readline2 (gdb_client_data client_data) |
b5a0ac70 SS |
813 | { |
814 | int c; | |
815 | char *result; | |
816 | int input_index = 0; | |
817 | int result_size = 80; | |
7be570e7 JM |
818 | static int done_once = 0; |
819 | ||
820 | /* Unbuffer the input stream, so that, later on, the calls to fgetc | |
821 | fetch only one char at the time from the stream. The fgetc's will | |
822 | get up to the first newline, but there may be more chars in the | |
823 | stream after '\n'. If we buffer the input and fgetc drains the | |
824 | stream, getting stuff beyond the newline as well, a select, done | |
825 | afterwards will not trigger. */ | |
826 | if (!done_once && !ISATTY (instream)) | |
827 | { | |
828 | setbuf (instream, NULL); | |
829 | done_once = 1; | |
830 | } | |
b5a0ac70 SS |
831 | |
832 | result = (char *) xmalloc (result_size); | |
833 | ||
834 | /* We still need the while loop here, even though it would seem | |
835 | obvious to invoke gdb_readline2 at every character entered. If | |
836 | not using the readline library, the terminal is in cooked mode, | |
837 | which sends the characters all at once. Poll will notice that the | |
838 | input fd has changed state only after enter is pressed. At this | |
839 | point we still need to fetch all the chars entered. */ | |
840 | ||
841 | while (1) | |
842 | { | |
843 | /* Read from stdin if we are executing a user defined command. | |
844 | This is the right thing for prompt_for_continue, at least. */ | |
845 | c = fgetc (instream ? instream : stdin); | |
846 | ||
847 | if (c == EOF) | |
848 | { | |
849 | if (input_index > 0) | |
850 | /* The last line does not end with a newline. Return it, and | |
851 | if we are called again fgetc will still return EOF and | |
852 | we'll return NULL then. */ | |
853 | break; | |
b8c9b27d | 854 | xfree (result); |
0f71a2f6 | 855 | (*input_handler) (0); |
b5a0ac70 SS |
856 | } |
857 | ||
858 | if (c == '\n') | |
b5a0ac70 SS |
859 | { |
860 | if (input_index > 0 && result[input_index - 1] == '\r') | |
861 | input_index--; | |
862 | break; | |
863 | } | |
b5a0ac70 SS |
864 | |
865 | result[input_index++] = c; | |
866 | while (input_index >= result_size) | |
867 | { | |
868 | result_size *= 2; | |
869 | result = (char *) xrealloc (result, result_size); | |
870 | } | |
871 | } | |
872 | ||
873 | result[input_index++] = '\0'; | |
0f71a2f6 | 874 | (*input_handler) (result); |
b5a0ac70 SS |
875 | } |
876 | \f | |
877 | ||
878 | /* Initialization of signal handlers and tokens. There is a function | |
879 | handle_sig* for each of the signals GDB cares about. Specifically: | |
880 | SIGINT, SIGFPE, SIGQUIT, SIGTSTP, SIGHUP, SIGWINCH. These | |
881 | functions are the actual signal handlers associated to the signals | |
882 | via calls to signal(). The only job for these functions is to | |
883 | enqueue the appropriate event/procedure with the event loop. Such | |
884 | procedures are the old signal handlers. The event loop will take | |
885 | care of invoking the queued procedures to perform the usual tasks | |
886 | associated with the reception of the signal. */ | |
392a587b | 887 | /* NOTE: 1999-04-30 This is the asynchronous version of init_signals. |
b5a0ac70 SS |
888 | init_signals will become obsolete as we move to have to event loop |
889 | as the default for gdb. */ | |
890 | void | |
c2c6d25f | 891 | async_init_signals (void) |
c5aa993b | 892 | { |
b5a0ac70 SS |
893 | signal (SIGINT, handle_sigint); |
894 | sigint_token = | |
0f71a2f6 | 895 | create_async_signal_handler (async_request_quit, NULL); |
b5a0ac70 SS |
896 | |
897 | /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed | |
898 | to the inferior and breakpoints will be ignored. */ | |
899 | #ifdef SIGTRAP | |
900 | signal (SIGTRAP, SIG_DFL); | |
901 | #endif | |
902 | ||
903 | /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get | |
904 | passed to the inferior, which we don't want. It would be | |
905 | possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but | |
906 | on BSD4.3 systems using vfork, that can affect the | |
907 | GDB process as well as the inferior (the signal handling tables | |
908 | might be in memory, shared between the two). Since we establish | |
909 | a handler for SIGQUIT, when we call exec it will set the signal | |
910 | to SIG_DFL for us. */ | |
911 | signal (SIGQUIT, handle_sigquit); | |
912 | sigquit_token = | |
0f71a2f6 | 913 | create_async_signal_handler (async_do_nothing, NULL); |
b5a0ac70 SS |
914 | #ifdef SIGHUP |
915 | if (signal (SIGHUP, handle_sighup) != SIG_IGN) | |
916 | sighup_token = | |
0f71a2f6 | 917 | create_async_signal_handler (async_disconnect, NULL); |
b5a0ac70 SS |
918 | else |
919 | sighup_token = | |
0f71a2f6 | 920 | create_async_signal_handler (async_do_nothing, NULL); |
b5a0ac70 SS |
921 | #endif |
922 | signal (SIGFPE, handle_sigfpe); | |
923 | sigfpe_token = | |
0f71a2f6 | 924 | create_async_signal_handler (async_float_handler, NULL); |
b5a0ac70 SS |
925 | |
926 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) | |
927 | signal (SIGWINCH, handle_sigwinch); | |
928 | sigwinch_token = | |
0f71a2f6 | 929 | create_async_signal_handler (SIGWINCH_HANDLER, NULL); |
b5a0ac70 | 930 | #endif |
0f71a2f6 JM |
931 | #ifdef STOP_SIGNAL |
932 | sigtstp_token = | |
933 | create_async_signal_handler (async_stop_sig, NULL); | |
934 | #endif | |
935 | ||
936 | } | |
937 | ||
c5aa993b | 938 | void |
97bb9d91 | 939 | mark_async_signal_handler_wrapper (void *token) |
0f71a2f6 | 940 | { |
c2c6d25f | 941 | mark_async_signal_handler ((struct async_signal_handler *) token); |
b5a0ac70 SS |
942 | } |
943 | ||
944 | /* Tell the event loop what to do if SIGINT is received. | |
945 | See event-signal.c. */ | |
c5aa993b | 946 | void |
c2c6d25f | 947 | handle_sigint (int sig) |
b5a0ac70 SS |
948 | { |
949 | signal (sig, handle_sigint); | |
950 | ||
951 | /* If immediate_quit is set, we go ahead and process the SIGINT right | |
952 | away, even if we usually would defer this to the event loop. The | |
953 | assumption here is that it is safe to process ^C immediately if | |
954 | immediate_quit is set. If we didn't, SIGINT would be really | |
955 | processed only the next time through the event loop. To get to | |
956 | that point, though, the command that we want to interrupt needs to | |
957 | finish first, which is unacceptable. */ | |
958 | if (immediate_quit) | |
0f71a2f6 | 959 | async_request_quit (0); |
b5a0ac70 SS |
960 | else |
961 | /* If immediate quit is not set, we process SIGINT the next time | |
962 | through the loop, which is fine. */ | |
0f71a2f6 | 963 | mark_async_signal_handler_wrapper (sigint_token); |
b5a0ac70 SS |
964 | } |
965 | ||
966 | /* Do the quit. All the checks have been done by the caller. */ | |
c5aa993b | 967 | void |
c2c6d25f | 968 | async_request_quit (gdb_client_data arg) |
b5a0ac70 SS |
969 | { |
970 | quit_flag = 1; | |
b5a0ac70 | 971 | quit (); |
b5a0ac70 SS |
972 | } |
973 | ||
974 | /* Tell the event loop what to do if SIGQUIT is received. | |
975 | See event-signal.c. */ | |
c5aa993b | 976 | static void |
c2c6d25f | 977 | handle_sigquit (int sig) |
b5a0ac70 | 978 | { |
0f71a2f6 | 979 | mark_async_signal_handler_wrapper (sigquit_token); |
b5a0ac70 SS |
980 | signal (sig, handle_sigquit); |
981 | } | |
982 | ||
983 | /* Called by the event loop in response to a SIGQUIT. */ | |
c5aa993b | 984 | static void |
c2c6d25f | 985 | async_do_nothing (gdb_client_data arg) |
b5a0ac70 SS |
986 | { |
987 | /* Empty function body. */ | |
988 | } | |
989 | ||
990 | #ifdef SIGHUP | |
991 | /* Tell the event loop what to do if SIGHUP is received. | |
992 | See event-signal.c. */ | |
c5aa993b | 993 | static void |
fba45db2 | 994 | handle_sighup (int sig) |
b5a0ac70 | 995 | { |
0f71a2f6 | 996 | mark_async_signal_handler_wrapper (sighup_token); |
b5a0ac70 SS |
997 | signal (sig, handle_sighup); |
998 | } | |
999 | ||
0f71a2f6 | 1000 | /* Called by the event loop to process a SIGHUP */ |
c5aa993b | 1001 | static void |
c2c6d25f | 1002 | async_disconnect (gdb_client_data arg) |
b5a0ac70 SS |
1003 | { |
1004 | catch_errors (quit_cover, NULL, | |
1005 | "Could not kill the program being debugged", | |
1006 | RETURN_MASK_ALL); | |
1007 | signal (SIGHUP, SIG_DFL); /*FIXME: ??????????? */ | |
1008 | kill (getpid (), SIGHUP); | |
1009 | } | |
1010 | #endif | |
1011 | ||
0f71a2f6 | 1012 | #ifdef STOP_SIGNAL |
c5aa993b | 1013 | void |
c2c6d25f | 1014 | handle_stop_sig (int sig) |
0f71a2f6 | 1015 | { |
c5aa993b JM |
1016 | mark_async_signal_handler_wrapper (sigtstp_token); |
1017 | signal (sig, handle_stop_sig); | |
0f71a2f6 JM |
1018 | } |
1019 | ||
1020 | static void | |
c2c6d25f | 1021 | async_stop_sig (gdb_client_data arg) |
0f71a2f6 | 1022 | { |
c5aa993b | 1023 | char *prompt = get_prompt (); |
0f71a2f6 JM |
1024 | #if STOP_SIGNAL == SIGTSTP |
1025 | signal (SIGTSTP, SIG_DFL); | |
2acceee2 JM |
1026 | #if HAVE_SIGPROCMASK |
1027 | { | |
1028 | sigset_t zero; | |
46711df8 | 1029 | |
2acceee2 JM |
1030 | sigemptyset (&zero); |
1031 | sigprocmask (SIG_SETMASK, &zero, 0); | |
1032 | } | |
46711df8 | 1033 | #elif HAVE_SIGSETMASK |
0f71a2f6 | 1034 | sigsetmask (0); |
2acceee2 | 1035 | #endif |
0f71a2f6 JM |
1036 | kill (getpid (), SIGTSTP); |
1037 | signal (SIGTSTP, handle_stop_sig); | |
1038 | #else | |
1039 | signal (STOP_SIGNAL, handle_stop_sig); | |
1040 | #endif | |
1041 | printf_unfiltered ("%s", prompt); | |
1042 | gdb_flush (gdb_stdout); | |
1043 | ||
1044 | /* Forget about any previous command -- null line now will do nothing. */ | |
1045 | dont_repeat (); | |
1046 | } | |
1047 | #endif /* STOP_SIGNAL */ | |
1048 | ||
b5a0ac70 SS |
1049 | /* Tell the event loop what to do if SIGFPE is received. |
1050 | See event-signal.c. */ | |
c5aa993b | 1051 | static void |
c2c6d25f | 1052 | handle_sigfpe (int sig) |
b5a0ac70 | 1053 | { |
0f71a2f6 | 1054 | mark_async_signal_handler_wrapper (sigfpe_token); |
b5a0ac70 SS |
1055 | signal (sig, handle_sigfpe); |
1056 | } | |
1057 | ||
1058 | /* Event loop will call this functin to process a SIGFPE. */ | |
c5aa993b | 1059 | static void |
c2c6d25f | 1060 | async_float_handler (gdb_client_data arg) |
b5a0ac70 SS |
1061 | { |
1062 | /* This message is based on ANSI C, section 4.7. Note that integer | |
1063 | divide by zero causes this, so "float" is a misnomer. */ | |
1064 | error ("Erroneous arithmetic operation."); | |
1065 | } | |
1066 | ||
1067 | /* Tell the event loop what to do if SIGWINCH is received. | |
1068 | See event-signal.c. */ | |
1069 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) | |
c5aa993b | 1070 | static void |
c2c6d25f | 1071 | handle_sigwinch (int sig) |
b5a0ac70 | 1072 | { |
0f71a2f6 | 1073 | mark_async_signal_handler_wrapper (sigwinch_token); |
b5a0ac70 SS |
1074 | signal (sig, handle_sigwinch); |
1075 | } | |
1076 | #endif | |
1077 | \f | |
1078 | ||
1079 | /* Called by do_setshow_command. */ | |
b5a0ac70 | 1080 | void |
c2c6d25f | 1081 | set_async_editing_command (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 SS |
1082 | { |
1083 | change_line_handler (); | |
1084 | } | |
1085 | ||
1086 | /* Called by do_setshow_command. */ | |
b5a0ac70 | 1087 | void |
c2c6d25f | 1088 | set_async_annotation_level (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 SS |
1089 | { |
1090 | change_annotation_level (); | |
1091 | } | |
1092 | ||
1093 | /* Called by do_setshow_command. */ | |
b5a0ac70 | 1094 | void |
c2c6d25f | 1095 | set_async_prompt (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 SS |
1096 | { |
1097 | PROMPT (0) = savestring (new_async_prompt, strlen (new_async_prompt)); | |
1098 | } | |
1099 | ||
0f71a2f6 JM |
1100 | /* Set things up for readline to be invoked via the alternate |
1101 | interface, i.e. via a callback function (rl_callback_read_char), | |
c5aa993b | 1102 | and hook up instream to the event loop. */ |
0f71a2f6 | 1103 | void |
cee6ddeb | 1104 | gdb_setup_readline (void) |
0f71a2f6 | 1105 | { |
362646f5 AC |
1106 | /* This function is a noop for the sync case. The assumption is |
1107 | that the sync setup is ALL done in gdb_init, and we would only | |
1108 | mess it up here. The sync stuff should really go away over | |
1109 | time. */ | |
1110 | ||
1111 | gdb_stdout = stdio_fileopen (stdout); | |
1112 | gdb_stderr = stdio_fileopen (stderr); | |
1113 | gdb_stdlog = gdb_stderr; /* for moment */ | |
1114 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
1115 | ||
1116 | /* If the input stream is connected to a terminal, turn on | |
1117 | editing. */ | |
1118 | if (ISATTY (instream)) | |
9e0b60a8 | 1119 | { |
362646f5 AC |
1120 | /* Tell gdb that we will be using the readline library. This |
1121 | could be overwritten by a command in .gdbinit like 'set | |
1122 | editing on' or 'off'. */ | |
1123 | async_command_editing_p = 1; | |
c5201926 | 1124 | |
362646f5 AC |
1125 | /* When a character is detected on instream by select or poll, |
1126 | readline will be invoked via this callback function. */ | |
1127 | call_readline = rl_callback_read_char_wrapper; | |
9e0b60a8 | 1128 | } |
362646f5 AC |
1129 | else |
1130 | { | |
1131 | async_command_editing_p = 0; | |
1132 | call_readline = gdb_readline2; | |
1133 | } | |
1134 | ||
1135 | /* When readline has read an end-of-line character, it passes the | |
1136 | complete line to gdb for processing. command_line_handler is the | |
1137 | function that does this. */ | |
1138 | input_handler = command_line_handler; | |
1139 | ||
1140 | /* Tell readline to use the same input stream that gdb uses. */ | |
1141 | rl_instream = instream; | |
1142 | ||
1143 | /* Get a file descriptor for the input stream, so that we can | |
1144 | register it with the event loop. */ | |
1145 | input_fd = fileno (instream); | |
1146 | ||
1147 | /* Now we need to create the event sources for the input file | |
1148 | descriptor. */ | |
1149 | /* At this point in time, this is the only event source that we | |
1150 | register with the even loop. Another source is going to be the | |
1151 | target program (inferior), but that must be registered only when | |
1152 | it actually exists (I.e. after we say 'run' or after we connect | |
1153 | to a remote target. */ | |
1154 | add_file_handler (input_fd, stdin_event_handler, 0); | |
0f71a2f6 | 1155 | } |
cee6ddeb | 1156 | |
7d5b6fdd EZ |
1157 | /* Disable command input through the standard CLI channels. Used in |
1158 | the suspend proc for interpreters that use the standard gdb readline | |
1159 | interface, like the cli & the mi. */ | |
1160 | void | |
1161 | gdb_disable_readline (void) | |
1162 | { | |
362646f5 AC |
1163 | /* FIXME - It is too heavyweight to delete and remake these every |
1164 | time you run an interpreter that needs readline. It is probably | |
1165 | better to have the interpreters cache these, which in turn means | |
1166 | that this needs to be moved into interpreter specific code. */ | |
7d5b6fdd EZ |
1167 | |
1168 | #if 0 | |
362646f5 AC |
1169 | ui_file_delete (gdb_stdout); |
1170 | ui_file_delete (gdb_stderr); | |
1171 | gdb_stdlog = NULL; | |
1172 | gdb_stdtarg = NULL; | |
7d5b6fdd EZ |
1173 | #endif |
1174 | ||
362646f5 AC |
1175 | rl_callback_handler_remove (); |
1176 | delete_file_handler (input_fd); | |
7d5b6fdd | 1177 | } |