Commit | Line | Data |
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b5a0ac70 | 1 | /* Top level stuff for GDB, the GNU debugger. |
a752853e | 2 | Copyright 1999, 2000, 2001, 2002 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> |
b5a0ac70 | 31 | |
104c1213 JM |
32 | /* For dont_repeat() */ |
33 | #include "gdbcmd.h" | |
34 | ||
b5a0ac70 SS |
35 | /* readline include files */ |
36 | #include <readline/readline.h> | |
37 | #include <readline/history.h> | |
38 | ||
39 | /* readline defines this. */ | |
40 | #undef savestring | |
41 | ||
c2c6d25f | 42 | extern void _initialize_event_loop (void); |
b5a0ac70 | 43 | |
c2c6d25f JM |
44 | static void rl_callback_read_char_wrapper (gdb_client_data client_data); |
45 | static void command_line_handler (char *rl); | |
46 | static void command_line_handler_continuation (struct continuation_arg *arg); | |
47 | static void change_line_handler (void); | |
48 | static void change_annotation_level (void); | |
49 | static void command_handler (char *command); | |
50 | void cli_command_loop (void); | |
51 | static void async_do_nothing (gdb_client_data arg); | |
52 | static void async_disconnect (gdb_client_data arg); | |
53 | static void async_stop_sig (gdb_client_data arg); | |
54 | static void async_float_handler (gdb_client_data arg); | |
b5a0ac70 SS |
55 | |
56 | /* Signal handlers. */ | |
c2c6d25f JM |
57 | static void handle_sigquit (int sig); |
58 | static void handle_sighup (int sig); | |
59 | static void handle_sigfpe (int sig); | |
d4f3574e | 60 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
c2c6d25f | 61 | static void handle_sigwinch (int sig); |
0f71a2f6 | 62 | #endif |
b5a0ac70 SS |
63 | |
64 | /* Functions to be invoked by the event loop in response to | |
65 | signals. */ | |
c2c6d25f JM |
66 | static void async_do_nothing (gdb_client_data); |
67 | static void async_disconnect (gdb_client_data); | |
68 | static void async_float_handler (gdb_client_data); | |
69 | static void async_stop_sig (gdb_client_data); | |
b5a0ac70 | 70 | |
b5a0ac70 SS |
71 | /* Readline offers an alternate interface, via callback |
72 | functions. These are all included in the file callback.c in the | |
73 | readline distribution. This file provides (mainly) a function, which | |
74 | the event loop uses as callback (i.e. event handler) whenever an event | |
75 | is detected on the standard input file descriptor. | |
76 | readline_callback_read_char is called (by the GDB event loop) whenever | |
77 | there is a new character ready on the input stream. This function | |
78 | incrementally builds a buffer internal to readline where it | |
79 | accumulates the line read up to the point of invocation. In the | |
80 | special case in which the character read is newline, the function | |
81 | invokes a GDB supplied callback routine, which does the processing of | |
82 | a full command line. This latter routine is the asynchronous analog | |
83 | of the old command_line_input in gdb. Instead of invoking (and waiting | |
84 | for) readline to read the command line and pass it back to | |
85 | command_loop for processing, the new command_line_handler function has | |
86 | the command line already available as its parameter. INPUT_HANDLER is | |
87 | to be set to the function that readline will invoke when a complete | |
88 | line of input is ready. CALL_READLINE is to be set to the function | |
89 | that readline offers as callback to the event_loop. */ | |
90 | ||
c2c6d25f JM |
91 | void (*input_handler) (char *); |
92 | void (*call_readline) (gdb_client_data); | |
b5a0ac70 SS |
93 | |
94 | /* Important variables for the event loop. */ | |
95 | ||
96 | /* This is used to determine if GDB is using the readline library or | |
97 | its own simplified form of readline. It is used by the asynchronous | |
0f71a2f6 | 98 | form of the set editing command. |
392a587b | 99 | ezannoni: as of 1999-04-29 I expect that this |
b5a0ac70 SS |
100 | variable will not be used after gdb is changed to use the event |
101 | loop as default engine, and event-top.c is merged into top.c. */ | |
102 | int async_command_editing_p; | |
103 | ||
104 | /* This variable contains the new prompt that the user sets with the | |
105 | set prompt command. */ | |
106 | char *new_async_prompt; | |
107 | ||
108 | /* This is the annotation suffix that will be used when the | |
109 | annotation_level is 2. */ | |
110 | char *async_annotation_suffix; | |
111 | ||
104c1213 JM |
112 | /* This is used to display the notification of the completion of an |
113 | asynchronous execution command. */ | |
114 | int exec_done_display_p = 0; | |
115 | ||
b5a0ac70 SS |
116 | /* This is the file descriptor for the input stream that GDB uses to |
117 | read commands from. */ | |
118 | int input_fd; | |
119 | ||
120 | /* This is the prompt stack. Prompts will be pushed on the stack as | |
121 | needed by the different 'kinds' of user inputs GDB is asking | |
122 | for. See event-loop.h. */ | |
123 | struct prompts the_prompts; | |
124 | ||
125 | /* signal handling variables */ | |
126 | /* Each of these is a pointer to a function that the event loop will | |
127 | invoke if the corresponding signal has received. The real signal | |
128 | handlers mark these functions as ready to be executed and the event | |
129 | loop, in a later iteration, calls them. See the function | |
130 | invoke_async_signal_handler. */ | |
97bb9d91 | 131 | void *sigint_token; |
b5a0ac70 | 132 | #ifdef SIGHUP |
97bb9d91 | 133 | void *sighup_token; |
b5a0ac70 | 134 | #endif |
97bb9d91 EZ |
135 | void *sigquit_token; |
136 | void *sigfpe_token; | |
b5a0ac70 | 137 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
97bb9d91 | 138 | void *sigwinch_token; |
b5a0ac70 | 139 | #endif |
0f71a2f6 | 140 | #ifdef STOP_SIGNAL |
97bb9d91 | 141 | void *sigtstp_token; |
0f71a2f6 JM |
142 | #endif |
143 | ||
b5a0ac70 SS |
144 | /* Structure to save a partially entered command. This is used when |
145 | the user types '\' at the end of a command line. This is necessary | |
146 | because each line of input is handled by a different call to | |
147 | command_line_handler, and normally there is no state retained | |
148 | between different calls. */ | |
149 | int more_to_come = 0; | |
150 | ||
151 | struct readline_input_state | |
152 | { | |
153 | char *linebuffer; | |
154 | char *linebuffer_ptr; | |
155 | } | |
156 | readline_input_state; | |
467d8519 TT |
157 | |
158 | /* This hook is called by rl_callback_read_char_wrapper after each | |
159 | character is processed. */ | |
160 | void (*after_char_processing_hook) (); | |
b5a0ac70 SS |
161 | \f |
162 | ||
701f9765 | 163 | /* Wrapper function for calling into the readline library. The event |
c2c6d25f JM |
164 | loop expects the callback function to have a paramter, while readline |
165 | expects none. */ | |
166 | static void | |
167 | rl_callback_read_char_wrapper (gdb_client_data client_data) | |
168 | { | |
169 | rl_callback_read_char (); | |
467d8519 TT |
170 | if (after_char_processing_hook) |
171 | (*after_char_processing_hook) (); | |
c2c6d25f JM |
172 | } |
173 | ||
b5a0ac70 | 174 | /* Initialize all the necessary variables, start the event loop, |
085dd6e6 | 175 | register readline, and stdin, start the loop. */ |
b5a0ac70 | 176 | void |
c2c6d25f | 177 | cli_command_loop (void) |
b5a0ac70 | 178 | { |
0f71a2f6 JM |
179 | int length; |
180 | char *a_prompt; | |
9e0b60a8 | 181 | char *gdb_prompt = get_prompt (); |
b5a0ac70 | 182 | |
0f71a2f6 JM |
183 | /* If we are using readline, set things up and display the first |
184 | prompt, otherwise just print the prompt. */ | |
185 | if (async_command_editing_p) | |
186 | { | |
187 | /* Tell readline what the prompt to display is and what function it | |
c5aa993b JM |
188 | will need to call after a whole line is read. This also displays |
189 | the first prompt. */ | |
9e0b60a8 | 190 | length = strlen (PREFIX (0)) + strlen (gdb_prompt) + strlen (SUFFIX (0)) + 1; |
0f71a2f6 JM |
191 | a_prompt = (char *) xmalloc (length); |
192 | strcpy (a_prompt, PREFIX (0)); | |
9e0b60a8 | 193 | strcat (a_prompt, gdb_prompt); |
0f71a2f6 JM |
194 | strcat (a_prompt, SUFFIX (0)); |
195 | rl_callback_handler_install (a_prompt, input_handler); | |
196 | } | |
197 | else | |
198 | display_gdb_prompt (0); | |
b5a0ac70 | 199 | |
085dd6e6 JM |
200 | /* Now it's time to start the event loop. */ |
201 | start_event_loop (); | |
b5a0ac70 SS |
202 | } |
203 | ||
204 | /* Change the function to be invoked every time there is a character | |
205 | ready on stdin. This is used when the user sets the editing off, | |
206 | therefore bypassing readline, and letting gdb handle the input | |
207 | itself, via gdb_readline2. Also it is used in the opposite case in | |
208 | which the user sets editing on again, by restoring readline | |
209 | handling of the input. */ | |
392a587b | 210 | static void |
c2c6d25f | 211 | change_line_handler (void) |
b5a0ac70 | 212 | { |
c2c6d25f JM |
213 | /* NOTE: this operates on input_fd, not instream. If we are reading |
214 | commands from a file, instream will point to the file. However in | |
215 | async mode, we always read commands from a file with editing | |
216 | off. This means that the 'set editing on/off' will have effect | |
217 | only on the interactive session. */ | |
218 | ||
b5a0ac70 SS |
219 | if (async_command_editing_p) |
220 | { | |
221 | /* Turn on editing by using readline. */ | |
c2c6d25f | 222 | call_readline = rl_callback_read_char_wrapper; |
0f71a2f6 | 223 | input_handler = command_line_handler; |
b5a0ac70 SS |
224 | } |
225 | else | |
226 | { | |
227 | /* Turn off editing by using gdb_readline2. */ | |
228 | rl_callback_handler_remove (); | |
229 | call_readline = gdb_readline2; | |
0f71a2f6 JM |
230 | |
231 | /* Set up the command handler as well, in case we are called as | |
c5aa993b | 232 | first thing from .gdbinit. */ |
0f71a2f6 | 233 | input_handler = command_line_handler; |
b5a0ac70 | 234 | } |
b5a0ac70 SS |
235 | } |
236 | ||
237 | /* Displays the prompt. The prompt that is displayed is the current | |
238 | top of the prompt stack, if the argument NEW_PROMPT is | |
239 | 0. Otherwise, it displays whatever NEW_PROMPT is. This is used | |
240 | after each gdb command has completed, and in the following cases: | |
0f71a2f6 JM |
241 | 1. when the user enters a command line which is ended by '\' |
242 | indicating that the command will continue on the next line. | |
b5a0ac70 | 243 | In that case the prompt that is displayed is the empty string. |
0f71a2f6 JM |
244 | 2. When the user is entering 'commands' for a breakpoint, or |
245 | actions for a tracepoint. In this case the prompt will be '>' | |
246 | 3. Other???? | |
b5a0ac70 SS |
247 | FIXME: 2. & 3. not implemented yet for async. */ |
248 | void | |
c2c6d25f | 249 | display_gdb_prompt (char *new_prompt) |
b5a0ac70 SS |
250 | { |
251 | int prompt_length = 0; | |
c5aa993b | 252 | char *gdb_prompt = get_prompt (); |
b5a0ac70 | 253 | |
4389a95a AC |
254 | /* Each interpreter has its own rules on displaying the command |
255 | prompt. */ | |
256 | if (!current_interp_display_prompt_p ()) | |
fb40c209 | 257 | return; |
fb40c209 | 258 | |
6426a772 | 259 | if (target_executing && sync_execution) |
adf40b2e JM |
260 | { |
261 | /* This is to trick readline into not trying to display the | |
6426a772 JM |
262 | prompt. Even though we display the prompt using this |
263 | function, readline still tries to do its own display if we | |
264 | don't call rl_callback_handler_install and | |
265 | rl_callback_handler_remove (which readline detects because a | |
266 | global variable is not set). If readline did that, it could | |
267 | mess up gdb signal handlers for SIGINT. Readline assumes | |
268 | that between calls to rl_set_signals and rl_clear_signals gdb | |
269 | doesn't do anything with the signal handlers. Well, that's | |
270 | not the case, because when the target executes we change the | |
271 | SIGINT signal handler. If we allowed readline to display the | |
272 | prompt, the signal handler change would happen exactly | |
273 | between the calls to the above two functions. | |
274 | Calling rl_callback_handler_remove(), does the job. */ | |
adf40b2e JM |
275 | |
276 | rl_callback_handler_remove (); | |
277 | return; | |
278 | } | |
279 | ||
b5a0ac70 SS |
280 | if (!new_prompt) |
281 | { | |
282 | /* Just use the top of the prompt stack. */ | |
283 | prompt_length = strlen (PREFIX (0)) + | |
284 | strlen (SUFFIX (0)) + | |
9e0b60a8 | 285 | strlen (gdb_prompt) + 1; |
b5a0ac70 SS |
286 | |
287 | new_prompt = (char *) alloca (prompt_length); | |
288 | ||
289 | /* Prefix needs to have new line at end. */ | |
290 | strcpy (new_prompt, PREFIX (0)); | |
9e0b60a8 | 291 | strcat (new_prompt, gdb_prompt); |
b5a0ac70 SS |
292 | /* Suffix needs to have a new line at end and \032 \032 at |
293 | beginning. */ | |
294 | strcat (new_prompt, SUFFIX (0)); | |
295 | } | |
296 | ||
297 | if (async_command_editing_p) | |
298 | { | |
299 | rl_callback_handler_remove (); | |
300 | rl_callback_handler_install (new_prompt, input_handler); | |
301 | } | |
adf40b2e | 302 | /* new_prompt at this point can be the top of the stack or the one passed in */ |
b5a0ac70 SS |
303 | else if (new_prompt) |
304 | { | |
305 | /* Don't use a _filtered function here. It causes the assumed | |
306 | character position to be off, since the newline we read from | |
307 | the user is not accounted for. */ | |
308 | fputs_unfiltered (new_prompt, gdb_stdout); | |
b5a0ac70 SS |
309 | gdb_flush (gdb_stdout); |
310 | } | |
311 | } | |
312 | ||
313 | /* Used when the user requests a different annotation level, with | |
314 | 'set annotate'. It pushes a new prompt (with prefix and suffix) on top | |
315 | of the prompt stack, if the annotation level desired is 2, otherwise | |
316 | it pops the top of the prompt stack when we want the annotation level | |
adf40b2e | 317 | to be the normal ones (1 or 0). */ |
392a587b | 318 | static void |
c2c6d25f | 319 | change_annotation_level (void) |
b5a0ac70 SS |
320 | { |
321 | char *prefix, *suffix; | |
322 | ||
323 | if (!PREFIX (0) || !PROMPT (0) || !SUFFIX (0)) | |
324 | { | |
325 | /* The prompt stack has not been initialized to "", we are | |
326 | using gdb w/o the --async switch */ | |
327 | warning ("Command has same effect as set annotate"); | |
328 | return; | |
329 | } | |
330 | ||
331 | if (annotation_level > 1) | |
332 | { | |
333 | if (!strcmp (PREFIX (0), "") && !strcmp (SUFFIX (0), "")) | |
334 | { | |
335 | /* Push a new prompt if the previous annotation_level was not >1. */ | |
336 | prefix = (char *) alloca (strlen (async_annotation_suffix) + 10); | |
337 | strcpy (prefix, "\n\032\032pre-"); | |
338 | strcat (prefix, async_annotation_suffix); | |
339 | strcat (prefix, "\n"); | |
340 | ||
341 | suffix = (char *) alloca (strlen (async_annotation_suffix) + 6); | |
342 | strcpy (suffix, "\n\032\032"); | |
343 | strcat (suffix, async_annotation_suffix); | |
344 | strcat (suffix, "\n"); | |
345 | ||
346 | push_prompt (prefix, (char *) 0, suffix); | |
347 | } | |
348 | } | |
349 | else | |
350 | { | |
351 | if (strcmp (PREFIX (0), "") && strcmp (SUFFIX (0), "")) | |
352 | { | |
353 | /* Pop the top of the stack, we are going back to annotation < 1. */ | |
354 | pop_prompt (); | |
355 | } | |
356 | } | |
357 | } | |
358 | ||
359 | /* Pushes a new prompt on the prompt stack. Each prompt has three | |
360 | parts: prefix, prompt, suffix. Usually prefix and suffix are empty | |
361 | strings, except when the annotation level is 2. Memory is allocated | |
362 | within savestring for the new prompt. */ | |
43ff13b4 | 363 | void |
c2c6d25f | 364 | push_prompt (char *prefix, char *prompt, char *suffix) |
b5a0ac70 SS |
365 | { |
366 | the_prompts.top++; | |
367 | PREFIX (0) = savestring (prefix, strlen (prefix)); | |
368 | ||
43ff13b4 JM |
369 | /* Note that this function is used by the set annotate 2 |
370 | command. This is why we take care of saving the old prompt | |
371 | in case a new one is not specified. */ | |
b5a0ac70 SS |
372 | if (prompt) |
373 | PROMPT (0) = savestring (prompt, strlen (prompt)); | |
374 | else | |
375 | PROMPT (0) = savestring (PROMPT (-1), strlen (PROMPT (-1))); | |
376 | ||
377 | SUFFIX (0) = savestring (suffix, strlen (suffix)); | |
378 | } | |
379 | ||
380 | /* Pops the top of the prompt stack, and frees the memory allocated for it. */ | |
43ff13b4 | 381 | void |
c2c6d25f | 382 | pop_prompt (void) |
b5a0ac70 | 383 | { |
43ff13b4 JM |
384 | /* If we are not during a 'synchronous' execution command, in which |
385 | case, the top prompt would be empty. */ | |
386 | if (strcmp (PROMPT (0), "")) | |
387 | /* This is for the case in which the prompt is set while the | |
388 | annotation level is 2. The top prompt will be changed, but when | |
389 | we return to annotation level < 2, we want that new prompt to be | |
390 | in effect, until the user does another 'set prompt'. */ | |
391 | if (strcmp (PROMPT (0), PROMPT (-1))) | |
392 | { | |
b8c9b27d | 393 | xfree (PROMPT (-1)); |
43ff13b4 JM |
394 | PROMPT (-1) = savestring (PROMPT (0), strlen (PROMPT (0))); |
395 | } | |
b5a0ac70 | 396 | |
b8c9b27d KB |
397 | xfree (PREFIX (0)); |
398 | xfree (PROMPT (0)); | |
399 | xfree (SUFFIX (0)); | |
b5a0ac70 SS |
400 | the_prompts.top--; |
401 | } | |
c2c6d25f JM |
402 | |
403 | /* When there is an event ready on the stdin file desriptor, instead | |
404 | of calling readline directly throught the callback function, or | |
405 | instead of calling gdb_readline2, give gdb a chance to detect | |
406 | errors and do something. */ | |
407 | void | |
2acceee2 | 408 | stdin_event_handler (int error, gdb_client_data client_data) |
c2c6d25f JM |
409 | { |
410 | if (error) | |
411 | { | |
2acceee2 JM |
412 | printf_unfiltered ("error detected on stdin\n"); |
413 | delete_file_handler (input_fd); | |
c2c6d25f JM |
414 | discard_all_continuations (); |
415 | /* If stdin died, we may as well kill gdb. */ | |
c5394b80 | 416 | quit_command ((char *) 0, stdin == instream); |
c2c6d25f JM |
417 | } |
418 | else | |
6426a772 | 419 | (*call_readline) (client_data); |
c2c6d25f JM |
420 | } |
421 | ||
6426a772 JM |
422 | /* Re-enable stdin after the end of an execution command in |
423 | synchronous mode, or after an error from the target, and we aborted | |
424 | the exec operation. */ | |
425 | ||
426 | void | |
427 | async_enable_stdin (void *dummy) | |
428 | { | |
429 | /* See NOTE in async_disable_stdin() */ | |
430 | /* FIXME: cagney/1999-09-27: Call this before clearing | |
431 | sync_execution. Current target_terminal_ours() implementations | |
432 | check for sync_execution before switching the terminal. */ | |
433 | target_terminal_ours (); | |
434 | pop_prompt (); | |
435 | sync_execution = 0; | |
436 | } | |
437 | ||
438 | /* Disable reads from stdin (the console) marking the command as | |
439 | synchronous. */ | |
440 | ||
441 | void | |
442 | async_disable_stdin (void) | |
443 | { | |
444 | sync_execution = 1; | |
445 | push_prompt ("", "", ""); | |
446 | /* FIXME: cagney/1999-09-27: At present this call is technically | |
447 | redundant since infcmd.c and infrun.c both already call | |
448 | target_terminal_inferior(). As the terminal handling (in | |
449 | sync/async mode) is refined, the duplicate calls can be | |
450 | eliminated (Here or in infcmd.c/infrun.c). */ | |
451 | target_terminal_inferior (); | |
2acceee2 JM |
452 | /* Add the reinstate of stdin to the list of cleanups to be done |
453 | in case the target errors out and dies. These cleanups are also | |
454 | done in case of normal successful termination of the execution | |
455 | command, by complete_execution(). */ | |
6426a772 JM |
456 | make_exec_error_cleanup (async_enable_stdin, NULL); |
457 | } | |
b5a0ac70 | 458 | \f |
6426a772 | 459 | |
b5a0ac70 SS |
460 | /* Handles a gdb command. This function is called by |
461 | command_line_handler, which has processed one or more input lines | |
462 | into COMMAND. */ | |
392a587b | 463 | /* NOTE: 1999-04-30 This is the asynchronous version of the command_loop |
b5a0ac70 SS |
464 | function. The command_loop function will be obsolete when we |
465 | switch to use the event loop at every execution of gdb. */ | |
392a587b | 466 | static void |
c2c6d25f | 467 | command_handler (char *command) |
b5a0ac70 SS |
468 | { |
469 | struct cleanup *old_chain; | |
470 | int stdin_is_tty = ISATTY (stdin); | |
43ff13b4 JM |
471 | struct continuation_arg *arg1; |
472 | struct continuation_arg *arg2; | |
b5a0ac70 SS |
473 | long time_at_cmd_start; |
474 | #ifdef HAVE_SBRK | |
475 | long space_at_cmd_start = 0; | |
476 | #endif | |
477 | extern int display_time; | |
478 | extern int display_space; | |
479 | ||
b5a0ac70 SS |
480 | quit_flag = 0; |
481 | if (instream == stdin && stdin_is_tty) | |
482 | reinitialize_more_filter (); | |
e2273c6d | 483 | old_chain = make_cleanup (null_cleanup, 0); |
b5a0ac70 | 484 | |
b5a0ac70 SS |
485 | /* If readline returned a NULL command, it means that the |
486 | connection with the terminal is gone. This happens at the | |
487 | end of a testsuite run, after Expect has hung up | |
488 | but GDB is still alive. In such a case, we just quit gdb | |
489 | killing the inferior program too. */ | |
490 | if (command == 0) | |
491 | quit_command ((char *) 0, stdin == instream); | |
492 | ||
493 | time_at_cmd_start = get_run_time (); | |
494 | ||
495 | if (display_space) | |
496 | { | |
497 | #ifdef HAVE_SBRK | |
498 | extern char **environ; | |
499 | char *lim = (char *) sbrk (0); | |
500 | ||
501 | space_at_cmd_start = (long) (lim - (char *) &environ); | |
502 | #endif | |
503 | } | |
504 | ||
505 | execute_command (command, instream == stdin); | |
c5aa993b | 506 | |
43ff13b4 | 507 | /* Set things up for this function to be compete later, once the |
701f9765 | 508 | execution has completed, if we are doing an execution command, |
43ff13b4 | 509 | otherwise, just go ahead and finish. */ |
6426a772 | 510 | if (target_can_async_p () && target_executing) |
43ff13b4 | 511 | { |
c5aa993b | 512 | arg1 = |
43ff13b4 | 513 | (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg)); |
c5aa993b | 514 | arg2 = |
43ff13b4 JM |
515 | (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg)); |
516 | arg1->next = arg2; | |
517 | arg2->next = NULL; | |
87c4a039 EZ |
518 | arg1->data.longint = time_at_cmd_start; |
519 | #ifdef HAVE_SBRK | |
520 | arg2->data.longint = space_at_cmd_start; | |
521 | #endif | |
43ff13b4 JM |
522 | add_continuation (command_line_handler_continuation, arg1); |
523 | } | |
b5a0ac70 | 524 | |
43ff13b4 JM |
525 | /* Do any commands attached to breakpoint we stopped at. Only if we |
526 | are always running synchronously. Or if we have just executed a | |
527 | command that doesn't start the target. */ | |
6426a772 | 528 | if (!target_can_async_p () || !target_executing) |
43ff13b4 JM |
529 | { |
530 | bpstat_do_actions (&stop_bpstat); | |
531 | do_cleanups (old_chain); | |
c5aa993b | 532 | |
43ff13b4 JM |
533 | if (display_time) |
534 | { | |
535 | long cmd_time = get_run_time () - time_at_cmd_start; | |
536 | ||
537 | printf_unfiltered ("Command execution time: %ld.%06ld\n", | |
538 | cmd_time / 1000000, cmd_time % 1000000); | |
539 | } | |
540 | ||
541 | if (display_space) | |
542 | { | |
543 | #ifdef HAVE_SBRK | |
544 | extern char **environ; | |
545 | char *lim = (char *) sbrk (0); | |
546 | long space_now = lim - (char *) &environ; | |
547 | long space_diff = space_now - space_at_cmd_start; | |
548 | ||
549 | printf_unfiltered ("Space used: %ld (%c%ld for this command)\n", | |
550 | space_now, | |
551 | (space_diff >= 0 ? '+' : '-'), | |
552 | space_diff); | |
553 | #endif | |
554 | } | |
555 | } | |
556 | } | |
557 | ||
558 | /* Do any commands attached to breakpoint we stopped at. Only if we | |
559 | are always running synchronously. Or if we have just executed a | |
560 | command that doesn't start the target. */ | |
561 | void | |
c2c6d25f | 562 | command_line_handler_continuation (struct continuation_arg *arg) |
c5aa993b | 563 | { |
43ff13b4 JM |
564 | extern int display_time; |
565 | extern int display_space; | |
566 | ||
57e687d9 MS |
567 | long time_at_cmd_start = arg->data.longint; |
568 | long space_at_cmd_start = arg->next->data.longint; | |
b5a0ac70 | 569 | |
43ff13b4 | 570 | bpstat_do_actions (&stop_bpstat); |
c5aa993b JM |
571 | /*do_cleanups (old_chain); *//*?????FIXME????? */ |
572 | ||
b5a0ac70 SS |
573 | if (display_time) |
574 | { | |
575 | long cmd_time = get_run_time () - time_at_cmd_start; | |
576 | ||
577 | printf_unfiltered ("Command execution time: %ld.%06ld\n", | |
578 | cmd_time / 1000000, cmd_time % 1000000); | |
579 | } | |
b5a0ac70 SS |
580 | if (display_space) |
581 | { | |
582 | #ifdef HAVE_SBRK | |
583 | extern char **environ; | |
584 | char *lim = (char *) sbrk (0); | |
585 | long space_now = lim - (char *) &environ; | |
586 | long space_diff = space_now - space_at_cmd_start; | |
587 | ||
588 | printf_unfiltered ("Space used: %ld (%c%ld for this command)\n", | |
589 | space_now, | |
590 | (space_diff >= 0 ? '+' : '-'), | |
591 | space_diff); | |
592 | #endif | |
593 | } | |
594 | } | |
595 | ||
596 | /* Handle a complete line of input. This is called by the callback | |
597 | mechanism within the readline library. Deal with incomplete commands | |
598 | as well, by saving the partial input in a global buffer. */ | |
599 | ||
392a587b | 600 | /* NOTE: 1999-04-30 This is the asynchronous version of the |
b5a0ac70 SS |
601 | command_line_input function. command_line_input will become |
602 | obsolete once we use the event loop as the default mechanism in | |
603 | GDB. */ | |
604 | static void | |
c2c6d25f | 605 | command_line_handler (char *rl) |
b5a0ac70 SS |
606 | { |
607 | static char *linebuffer = 0; | |
608 | static unsigned linelength = 0; | |
609 | register char *p; | |
610 | char *p1; | |
b5a0ac70 SS |
611 | extern char *line; |
612 | extern int linesize; | |
613 | char *nline; | |
614 | char got_eof = 0; | |
615 | ||
616 | ||
617 | int repeat = (instream == stdin); | |
618 | ||
619 | if (annotation_level > 1 && instream == stdin) | |
620 | { | |
621 | printf_unfiltered ("\n\032\032post-"); | |
622 | printf_unfiltered (async_annotation_suffix); | |
623 | printf_unfiltered ("\n"); | |
624 | } | |
625 | ||
626 | if (linebuffer == 0) | |
627 | { | |
628 | linelength = 80; | |
629 | linebuffer = (char *) xmalloc (linelength); | |
630 | } | |
631 | ||
632 | p = linebuffer; | |
633 | ||
634 | if (more_to_come) | |
635 | { | |
636 | strcpy (linebuffer, readline_input_state.linebuffer); | |
637 | p = readline_input_state.linebuffer_ptr; | |
b8c9b27d | 638 | xfree (readline_input_state.linebuffer); |
b5a0ac70 | 639 | more_to_come = 0; |
adf40b2e | 640 | pop_prompt (); |
b5a0ac70 SS |
641 | } |
642 | ||
643 | #ifdef STOP_SIGNAL | |
644 | if (job_control) | |
0f71a2f6 | 645 | signal (STOP_SIGNAL, handle_stop_sig); |
b5a0ac70 SS |
646 | #endif |
647 | ||
648 | /* Make sure that all output has been output. Some machines may let | |
649 | you get away with leaving out some of the gdb_flush, but not all. */ | |
650 | wrap_here (""); | |
651 | gdb_flush (gdb_stdout); | |
652 | gdb_flush (gdb_stderr); | |
653 | ||
654 | if (source_file_name != NULL) | |
655 | { | |
656 | ++source_line_number; | |
657 | sprintf (source_error, | |
658 | "%s%s:%d: Error in sourced command file:\n", | |
659 | source_pre_error, | |
660 | source_file_name, | |
661 | source_line_number); | |
662 | error_pre_print = source_error; | |
663 | } | |
664 | ||
665 | /* If we are in this case, then command_handler will call quit | |
666 | and exit from gdb. */ | |
667 | if (!rl || rl == (char *) EOF) | |
668 | { | |
669 | got_eof = 1; | |
670 | command_handler (0); | |
671 | } | |
672 | if (strlen (rl) + 1 + (p - linebuffer) > linelength) | |
673 | { | |
674 | linelength = strlen (rl) + 1 + (p - linebuffer); | |
675 | nline = (char *) xrealloc (linebuffer, linelength); | |
676 | p += nline - linebuffer; | |
677 | linebuffer = nline; | |
678 | } | |
679 | p1 = rl; | |
680 | /* Copy line. Don't copy null at end. (Leaves line alone | |
681 | if this was just a newline) */ | |
682 | while (*p1) | |
683 | *p++ = *p1++; | |
684 | ||
b8c9b27d | 685 | xfree (rl); /* Allocated in readline. */ |
b5a0ac70 | 686 | |
4dd79c29 | 687 | if (p > linebuffer && *(p - 1) == '\\') |
b5a0ac70 | 688 | { |
b5a0ac70 SS |
689 | p--; /* Put on top of '\'. */ |
690 | ||
d96429cd AS |
691 | readline_input_state.linebuffer = savestring (linebuffer, |
692 | strlen (linebuffer)); | |
693 | readline_input_state.linebuffer_ptr = p; | |
694 | ||
695 | /* We will not invoke a execute_command if there is more | |
696 | input expected to complete the command. So, we need to | |
697 | print an empty prompt here. */ | |
698 | more_to_come = 1; | |
699 | push_prompt ("", "", ""); | |
700 | display_gdb_prompt (0); | |
701 | return; | |
b5a0ac70 SS |
702 | } |
703 | ||
704 | #ifdef STOP_SIGNAL | |
705 | if (job_control) | |
706 | signal (STOP_SIGNAL, SIG_DFL); | |
707 | #endif | |
708 | ||
709 | #define SERVER_COMMAND_LENGTH 7 | |
710 | server_command = | |
711 | (p - linebuffer > SERVER_COMMAND_LENGTH) | |
712 | && STREQN (linebuffer, "server ", SERVER_COMMAND_LENGTH); | |
713 | if (server_command) | |
714 | { | |
715 | /* Note that we don't set `line'. Between this and the check in | |
716 | dont_repeat, this insures that repeating will still do the | |
717 | right thing. */ | |
718 | *p = '\0'; | |
719 | command_handler (linebuffer + SERVER_COMMAND_LENGTH); | |
720 | display_gdb_prompt (0); | |
721 | return; | |
722 | } | |
723 | ||
724 | /* Do history expansion if that is wished. */ | |
725 | if (history_expansion_p && instream == stdin | |
726 | && ISATTY (instream)) | |
727 | { | |
728 | char *history_value; | |
729 | int expanded; | |
730 | ||
731 | *p = '\0'; /* Insert null now. */ | |
732 | expanded = history_expand (linebuffer, &history_value); | |
733 | if (expanded) | |
734 | { | |
735 | /* Print the changes. */ | |
736 | printf_unfiltered ("%s\n", history_value); | |
737 | ||
738 | /* If there was an error, call this function again. */ | |
739 | if (expanded < 0) | |
740 | { | |
b8c9b27d | 741 | xfree (history_value); |
b5a0ac70 SS |
742 | return; |
743 | } | |
744 | if (strlen (history_value) > linelength) | |
745 | { | |
746 | linelength = strlen (history_value) + 1; | |
747 | linebuffer = (char *) xrealloc (linebuffer, linelength); | |
748 | } | |
749 | strcpy (linebuffer, history_value); | |
750 | p = linebuffer + strlen (linebuffer); | |
b8c9b27d | 751 | xfree (history_value); |
b5a0ac70 SS |
752 | } |
753 | } | |
754 | ||
755 | /* If we just got an empty line, and that is supposed | |
756 | to repeat the previous command, return the value in the | |
757 | global buffer. */ | |
758 | if (repeat && p == linebuffer && *p != '\\') | |
759 | { | |
760 | command_handler (line); | |
761 | display_gdb_prompt (0); | |
762 | return; | |
763 | } | |
764 | ||
765 | for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++); | |
766 | if (repeat && !*p1) | |
767 | { | |
768 | command_handler (line); | |
769 | display_gdb_prompt (0); | |
770 | return; | |
771 | } | |
772 | ||
773 | *p = 0; | |
774 | ||
775 | /* Add line to history if appropriate. */ | |
776 | if (instream == stdin | |
777 | && ISATTY (stdin) && *linebuffer) | |
778 | add_history (linebuffer); | |
779 | ||
780 | /* Note: lines consisting solely of comments are added to the command | |
781 | history. This is useful when you type a command, and then | |
782 | realize you don't want to execute it quite yet. You can comment | |
783 | out the command and then later fetch it from the value history | |
784 | and remove the '#'. The kill ring is probably better, but some | |
785 | people are in the habit of commenting things out. */ | |
786 | if (*p1 == '#') | |
787 | *p1 = '\0'; /* Found a comment. */ | |
788 | ||
789 | /* Save into global buffer if appropriate. */ | |
790 | if (repeat) | |
791 | { | |
792 | if (linelength > linesize) | |
793 | { | |
794 | line = xrealloc (line, linelength); | |
795 | linesize = linelength; | |
796 | } | |
797 | strcpy (line, linebuffer); | |
798 | if (!more_to_come) | |
799 | { | |
800 | command_handler (line); | |
801 | display_gdb_prompt (0); | |
802 | } | |
803 | return; | |
804 | } | |
805 | ||
806 | command_handler (linebuffer); | |
807 | display_gdb_prompt (0); | |
808 | return; | |
809 | } | |
810 | ||
811 | /* Does reading of input from terminal w/o the editing features | |
812 | provided by the readline library. */ | |
813 | ||
392a587b | 814 | /* NOTE: 1999-04-30 Asynchronous version of gdb_readline. gdb_readline |
b5a0ac70 SS |
815 | will become obsolete when the event loop is made the default |
816 | execution for gdb. */ | |
085dd6e6 | 817 | void |
c2c6d25f | 818 | gdb_readline2 (gdb_client_data client_data) |
b5a0ac70 SS |
819 | { |
820 | int c; | |
821 | char *result; | |
822 | int input_index = 0; | |
823 | int result_size = 80; | |
7be570e7 JM |
824 | static int done_once = 0; |
825 | ||
826 | /* Unbuffer the input stream, so that, later on, the calls to fgetc | |
827 | fetch only one char at the time from the stream. The fgetc's will | |
828 | get up to the first newline, but there may be more chars in the | |
829 | stream after '\n'. If we buffer the input and fgetc drains the | |
830 | stream, getting stuff beyond the newline as well, a select, done | |
831 | afterwards will not trigger. */ | |
832 | if (!done_once && !ISATTY (instream)) | |
833 | { | |
834 | setbuf (instream, NULL); | |
835 | done_once = 1; | |
836 | } | |
b5a0ac70 SS |
837 | |
838 | result = (char *) xmalloc (result_size); | |
839 | ||
840 | /* We still need the while loop here, even though it would seem | |
841 | obvious to invoke gdb_readline2 at every character entered. If | |
842 | not using the readline library, the terminal is in cooked mode, | |
843 | which sends the characters all at once. Poll will notice that the | |
844 | input fd has changed state only after enter is pressed. At this | |
845 | point we still need to fetch all the chars entered. */ | |
846 | ||
847 | while (1) | |
848 | { | |
849 | /* Read from stdin if we are executing a user defined command. | |
850 | This is the right thing for prompt_for_continue, at least. */ | |
851 | c = fgetc (instream ? instream : stdin); | |
852 | ||
853 | if (c == EOF) | |
854 | { | |
855 | if (input_index > 0) | |
856 | /* The last line does not end with a newline. Return it, and | |
857 | if we are called again fgetc will still return EOF and | |
858 | we'll return NULL then. */ | |
859 | break; | |
b8c9b27d | 860 | xfree (result); |
0f71a2f6 | 861 | (*input_handler) (0); |
b5a0ac70 SS |
862 | } |
863 | ||
864 | if (c == '\n') | |
865 | #ifndef CRLF_SOURCE_FILES | |
866 | break; | |
867 | #else | |
868 | { | |
869 | if (input_index > 0 && result[input_index - 1] == '\r') | |
870 | input_index--; | |
871 | break; | |
872 | } | |
873 | #endif | |
874 | ||
875 | result[input_index++] = c; | |
876 | while (input_index >= result_size) | |
877 | { | |
878 | result_size *= 2; | |
879 | result = (char *) xrealloc (result, result_size); | |
880 | } | |
881 | } | |
882 | ||
883 | result[input_index++] = '\0'; | |
0f71a2f6 | 884 | (*input_handler) (result); |
b5a0ac70 SS |
885 | } |
886 | \f | |
887 | ||
888 | /* Initialization of signal handlers and tokens. There is a function | |
889 | handle_sig* for each of the signals GDB cares about. Specifically: | |
890 | SIGINT, SIGFPE, SIGQUIT, SIGTSTP, SIGHUP, SIGWINCH. These | |
891 | functions are the actual signal handlers associated to the signals | |
892 | via calls to signal(). The only job for these functions is to | |
893 | enqueue the appropriate event/procedure with the event loop. Such | |
894 | procedures are the old signal handlers. The event loop will take | |
895 | care of invoking the queued procedures to perform the usual tasks | |
896 | associated with the reception of the signal. */ | |
392a587b | 897 | /* NOTE: 1999-04-30 This is the asynchronous version of init_signals. |
b5a0ac70 SS |
898 | init_signals will become obsolete as we move to have to event loop |
899 | as the default for gdb. */ | |
900 | void | |
c2c6d25f | 901 | async_init_signals (void) |
c5aa993b | 902 | { |
b5a0ac70 SS |
903 | signal (SIGINT, handle_sigint); |
904 | sigint_token = | |
0f71a2f6 | 905 | create_async_signal_handler (async_request_quit, NULL); |
b5a0ac70 SS |
906 | |
907 | /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed | |
908 | to the inferior and breakpoints will be ignored. */ | |
909 | #ifdef SIGTRAP | |
910 | signal (SIGTRAP, SIG_DFL); | |
911 | #endif | |
912 | ||
913 | /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get | |
914 | passed to the inferior, which we don't want. It would be | |
915 | possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but | |
916 | on BSD4.3 systems using vfork, that can affect the | |
917 | GDB process as well as the inferior (the signal handling tables | |
918 | might be in memory, shared between the two). Since we establish | |
919 | a handler for SIGQUIT, when we call exec it will set the signal | |
920 | to SIG_DFL for us. */ | |
921 | signal (SIGQUIT, handle_sigquit); | |
922 | sigquit_token = | |
0f71a2f6 | 923 | create_async_signal_handler (async_do_nothing, NULL); |
b5a0ac70 SS |
924 | #ifdef SIGHUP |
925 | if (signal (SIGHUP, handle_sighup) != SIG_IGN) | |
926 | sighup_token = | |
0f71a2f6 | 927 | create_async_signal_handler (async_disconnect, NULL); |
b5a0ac70 SS |
928 | else |
929 | sighup_token = | |
0f71a2f6 | 930 | create_async_signal_handler (async_do_nothing, NULL); |
b5a0ac70 SS |
931 | #endif |
932 | signal (SIGFPE, handle_sigfpe); | |
933 | sigfpe_token = | |
0f71a2f6 | 934 | create_async_signal_handler (async_float_handler, NULL); |
b5a0ac70 SS |
935 | |
936 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) | |
937 | signal (SIGWINCH, handle_sigwinch); | |
938 | sigwinch_token = | |
0f71a2f6 | 939 | create_async_signal_handler (SIGWINCH_HANDLER, NULL); |
b5a0ac70 | 940 | #endif |
0f71a2f6 JM |
941 | #ifdef STOP_SIGNAL |
942 | sigtstp_token = | |
943 | create_async_signal_handler (async_stop_sig, NULL); | |
944 | #endif | |
945 | ||
946 | } | |
947 | ||
c5aa993b | 948 | void |
97bb9d91 | 949 | mark_async_signal_handler_wrapper (void *token) |
0f71a2f6 | 950 | { |
c2c6d25f | 951 | mark_async_signal_handler ((struct async_signal_handler *) token); |
b5a0ac70 SS |
952 | } |
953 | ||
954 | /* Tell the event loop what to do if SIGINT is received. | |
955 | See event-signal.c. */ | |
c5aa993b | 956 | void |
c2c6d25f | 957 | handle_sigint (int sig) |
b5a0ac70 SS |
958 | { |
959 | signal (sig, handle_sigint); | |
960 | ||
961 | /* If immediate_quit is set, we go ahead and process the SIGINT right | |
962 | away, even if we usually would defer this to the event loop. The | |
963 | assumption here is that it is safe to process ^C immediately if | |
964 | immediate_quit is set. If we didn't, SIGINT would be really | |
965 | processed only the next time through the event loop. To get to | |
966 | that point, though, the command that we want to interrupt needs to | |
967 | finish first, which is unacceptable. */ | |
968 | if (immediate_quit) | |
0f71a2f6 | 969 | async_request_quit (0); |
b5a0ac70 SS |
970 | else |
971 | /* If immediate quit is not set, we process SIGINT the next time | |
972 | through the loop, which is fine. */ | |
0f71a2f6 | 973 | mark_async_signal_handler_wrapper (sigint_token); |
b5a0ac70 SS |
974 | } |
975 | ||
976 | /* Do the quit. All the checks have been done by the caller. */ | |
c5aa993b | 977 | void |
c2c6d25f | 978 | async_request_quit (gdb_client_data arg) |
b5a0ac70 SS |
979 | { |
980 | quit_flag = 1; | |
981 | #ifdef REQUEST_QUIT | |
982 | REQUEST_QUIT; | |
983 | #else | |
984 | quit (); | |
985 | #endif | |
986 | } | |
987 | ||
988 | /* Tell the event loop what to do if SIGQUIT is received. | |
989 | See event-signal.c. */ | |
c5aa993b | 990 | static void |
c2c6d25f | 991 | handle_sigquit (int sig) |
b5a0ac70 | 992 | { |
0f71a2f6 | 993 | mark_async_signal_handler_wrapper (sigquit_token); |
b5a0ac70 SS |
994 | signal (sig, handle_sigquit); |
995 | } | |
996 | ||
997 | /* Called by the event loop in response to a SIGQUIT. */ | |
c5aa993b | 998 | static void |
c2c6d25f | 999 | async_do_nothing (gdb_client_data arg) |
b5a0ac70 SS |
1000 | { |
1001 | /* Empty function body. */ | |
1002 | } | |
1003 | ||
1004 | #ifdef SIGHUP | |
1005 | /* Tell the event loop what to do if SIGHUP is received. | |
1006 | See event-signal.c. */ | |
c5aa993b | 1007 | static void |
fba45db2 | 1008 | handle_sighup (int sig) |
b5a0ac70 | 1009 | { |
0f71a2f6 | 1010 | mark_async_signal_handler_wrapper (sighup_token); |
b5a0ac70 SS |
1011 | signal (sig, handle_sighup); |
1012 | } | |
1013 | ||
0f71a2f6 | 1014 | /* Called by the event loop to process a SIGHUP */ |
c5aa993b | 1015 | static void |
c2c6d25f | 1016 | async_disconnect (gdb_client_data arg) |
b5a0ac70 SS |
1017 | { |
1018 | catch_errors (quit_cover, NULL, | |
1019 | "Could not kill the program being debugged", | |
1020 | RETURN_MASK_ALL); | |
1021 | signal (SIGHUP, SIG_DFL); /*FIXME: ??????????? */ | |
1022 | kill (getpid (), SIGHUP); | |
1023 | } | |
1024 | #endif | |
1025 | ||
0f71a2f6 | 1026 | #ifdef STOP_SIGNAL |
c5aa993b | 1027 | void |
c2c6d25f | 1028 | handle_stop_sig (int sig) |
0f71a2f6 | 1029 | { |
c5aa993b JM |
1030 | mark_async_signal_handler_wrapper (sigtstp_token); |
1031 | signal (sig, handle_stop_sig); | |
0f71a2f6 JM |
1032 | } |
1033 | ||
1034 | static void | |
c2c6d25f | 1035 | async_stop_sig (gdb_client_data arg) |
0f71a2f6 | 1036 | { |
c5aa993b | 1037 | char *prompt = get_prompt (); |
0f71a2f6 JM |
1038 | #if STOP_SIGNAL == SIGTSTP |
1039 | signal (SIGTSTP, SIG_DFL); | |
2acceee2 JM |
1040 | #if HAVE_SIGPROCMASK |
1041 | { | |
1042 | sigset_t zero; | |
46711df8 | 1043 | |
2acceee2 JM |
1044 | sigemptyset (&zero); |
1045 | sigprocmask (SIG_SETMASK, &zero, 0); | |
1046 | } | |
46711df8 | 1047 | #elif HAVE_SIGSETMASK |
0f71a2f6 | 1048 | sigsetmask (0); |
2acceee2 | 1049 | #endif |
0f71a2f6 JM |
1050 | kill (getpid (), SIGTSTP); |
1051 | signal (SIGTSTP, handle_stop_sig); | |
1052 | #else | |
1053 | signal (STOP_SIGNAL, handle_stop_sig); | |
1054 | #endif | |
1055 | printf_unfiltered ("%s", prompt); | |
1056 | gdb_flush (gdb_stdout); | |
1057 | ||
1058 | /* Forget about any previous command -- null line now will do nothing. */ | |
1059 | dont_repeat (); | |
1060 | } | |
1061 | #endif /* STOP_SIGNAL */ | |
1062 | ||
b5a0ac70 SS |
1063 | /* Tell the event loop what to do if SIGFPE is received. |
1064 | See event-signal.c. */ | |
c5aa993b | 1065 | static void |
c2c6d25f | 1066 | handle_sigfpe (int sig) |
b5a0ac70 | 1067 | { |
0f71a2f6 | 1068 | mark_async_signal_handler_wrapper (sigfpe_token); |
b5a0ac70 SS |
1069 | signal (sig, handle_sigfpe); |
1070 | } | |
1071 | ||
1072 | /* Event loop will call this functin to process a SIGFPE. */ | |
c5aa993b | 1073 | static void |
c2c6d25f | 1074 | async_float_handler (gdb_client_data arg) |
b5a0ac70 SS |
1075 | { |
1076 | /* This message is based on ANSI C, section 4.7. Note that integer | |
1077 | divide by zero causes this, so "float" is a misnomer. */ | |
1078 | error ("Erroneous arithmetic operation."); | |
1079 | } | |
1080 | ||
1081 | /* Tell the event loop what to do if SIGWINCH is received. | |
1082 | See event-signal.c. */ | |
1083 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) | |
c5aa993b | 1084 | static void |
c2c6d25f | 1085 | handle_sigwinch (int sig) |
b5a0ac70 | 1086 | { |
0f71a2f6 | 1087 | mark_async_signal_handler_wrapper (sigwinch_token); |
b5a0ac70 SS |
1088 | signal (sig, handle_sigwinch); |
1089 | } | |
1090 | #endif | |
1091 | \f | |
1092 | ||
1093 | /* Called by do_setshow_command. */ | |
1094 | /* ARGSUSED */ | |
1095 | void | |
c2c6d25f | 1096 | set_async_editing_command (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 SS |
1097 | { |
1098 | change_line_handler (); | |
1099 | } | |
1100 | ||
1101 | /* Called by do_setshow_command. */ | |
1102 | /* ARGSUSED */ | |
1103 | void | |
c2c6d25f | 1104 | set_async_annotation_level (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 SS |
1105 | { |
1106 | change_annotation_level (); | |
1107 | } | |
1108 | ||
1109 | /* Called by do_setshow_command. */ | |
1110 | /* ARGSUSED */ | |
1111 | void | |
c2c6d25f | 1112 | set_async_prompt (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 SS |
1113 | { |
1114 | PROMPT (0) = savestring (new_async_prompt, strlen (new_async_prompt)); | |
1115 | } | |
1116 | ||
0f71a2f6 JM |
1117 | /* Set things up for readline to be invoked via the alternate |
1118 | interface, i.e. via a callback function (rl_callback_read_char), | |
c5aa993b | 1119 | and hook up instream to the event loop. */ |
0f71a2f6 | 1120 | void |
cee6ddeb | 1121 | gdb_setup_readline (void) |
0f71a2f6 | 1122 | { |
cee6ddeb EZ |
1123 | /* This function is a noop for the sync case. The assumption is that |
1124 | the sync setup is ALL done in gdb_init, and we would only mess it up | |
1125 | here. The sync stuff should really go away over time. */ | |
1126 | ||
6426a772 | 1127 | if (event_loop_p) |
9e0b60a8 | 1128 | { |
4389a95a AC |
1129 | gdb_stdout = stdio_fileopen (stdout); |
1130 | gdb_stderr = stdio_fileopen (stderr); | |
1131 | gdb_stdlog = gdb_stderr; /* for moment */ | |
1132 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
1133 | ||
c5201926 EZ |
1134 | /* If the input stream is connected to a terminal, turn on |
1135 | editing. */ | |
1136 | if (ISATTY (instream)) | |
1137 | { | |
1138 | /* Tell gdb that we will be using the readline library. This | |
1139 | could be overwritten by a command in .gdbinit like 'set | |
1140 | editing on' or 'off'. */ | |
1141 | async_command_editing_p = 1; | |
1142 | ||
1143 | /* When a character is detected on instream by select or | |
1144 | poll, readline will be invoked via this callback | |
1145 | function. */ | |
1146 | call_readline = rl_callback_read_char_wrapper; | |
1147 | } | |
1148 | else | |
1149 | { | |
1150 | async_command_editing_p = 0; | |
1151 | call_readline = gdb_readline2; | |
1152 | } | |
9e0b60a8 JM |
1153 | |
1154 | /* When readline has read an end-of-line character, it passes | |
c5aa993b JM |
1155 | the complete line to gdb for processing. command_line_handler |
1156 | is the function that does this. */ | |
9e0b60a8 JM |
1157 | input_handler = command_line_handler; |
1158 | ||
1159 | /* Tell readline to use the same input stream that gdb uses. */ | |
1160 | rl_instream = instream; | |
1161 | ||
1162 | /* Get a file descriptor for the input stream, so that we can | |
085dd6e6 | 1163 | register it with the event loop. */ |
9e0b60a8 JM |
1164 | input_fd = fileno (instream); |
1165 | ||
1166 | /* Now we need to create the event sources for the input file | |
1167 | descriptor. */ | |
1168 | /* At this point in time, this is the only event source that we | |
c5aa993b JM |
1169 | register with the even loop. Another source is going to be |
1170 | the target program (inferior), but that must be registered | |
1171 | only when it actually exists (I.e. after we say 'run' or | |
1172 | after we connect to a remote target. */ | |
c2c6d25f | 1173 | add_file_handler (input_fd, stdin_event_handler, 0); |
9e0b60a8 | 1174 | } |
0f71a2f6 | 1175 | } |
cee6ddeb | 1176 | |
7d5b6fdd EZ |
1177 | /* Disable command input through the standard CLI channels. Used in |
1178 | the suspend proc for interpreters that use the standard gdb readline | |
1179 | interface, like the cli & the mi. */ | |
1180 | void | |
1181 | gdb_disable_readline (void) | |
1182 | { | |
1183 | if (event_loop_p) | |
1184 | { | |
1185 | /* FIXME - It is too heavyweight to delete and remake these | |
1186 | every time you run an interpreter that needs readline. | |
1187 | It is probably better to have the interpreters cache these, | |
1188 | which in turn means that this needs to be moved into interpreter | |
1189 | specific code. */ | |
1190 | ||
1191 | #if 0 | |
1192 | ui_file_delete (gdb_stdout); | |
1193 | ui_file_delete (gdb_stderr); | |
1194 | gdb_stdlog = NULL; | |
1195 | gdb_stdtarg = NULL; | |
1196 | #endif | |
1197 | ||
1198 | rl_callback_handler_remove (); | |
1199 | delete_file_handler (input_fd); | |
1200 | } | |
1201 | } | |
1202 | ||
cee6ddeb EZ |
1203 | void |
1204 | _initialize_event_loop (void) | |
1205 | { | |
7d5b6fdd | 1206 | /* Tell gdb to use the cli_command_loop as the main loop. */ |
cee6ddeb | 1207 | if (event_loop_p && command_loop_hook == NULL) |
7d5b6fdd | 1208 | command_loop_hook = cli_command_loop; |
cee6ddeb | 1209 | } |
7d5b6fdd | 1210 |