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b5a0ac70 SS |
1 | /* Top level stuff for GDB, the GNU debugger. |
2 | Copyright 1999 Free Software Foundation, Inc. | |
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 */ |
c2c6d25f | 27 | #include "signals.h" |
9e0b60a8 | 28 | #include "event-loop.h" |
c2c6d25f | 29 | #include "event-top.h" |
b5a0ac70 | 30 | |
104c1213 JM |
31 | /* For dont_repeat() */ |
32 | #include "gdbcmd.h" | |
33 | ||
b5a0ac70 SS |
34 | /* readline include files */ |
35 | #include <readline/readline.h> | |
36 | #include <readline/history.h> | |
37 | ||
2acceee2 JM |
38 | #include <signal.h> |
39 | ||
b5a0ac70 SS |
40 | /* readline defines this. */ |
41 | #undef savestring | |
42 | ||
c2c6d25f | 43 | extern void _initialize_event_loop (void); |
b5a0ac70 | 44 | |
c2c6d25f JM |
45 | static void rl_callback_read_char_wrapper (gdb_client_data client_data); |
46 | static void command_line_handler (char *rl); | |
47 | static void command_line_handler_continuation (struct continuation_arg *arg); | |
48 | static void change_line_handler (void); | |
49 | static void change_annotation_level (void); | |
50 | static void command_handler (char *command); | |
51 | void cli_command_loop (void); | |
52 | static void async_do_nothing (gdb_client_data arg); | |
53 | static void async_disconnect (gdb_client_data arg); | |
54 | static void async_stop_sig (gdb_client_data arg); | |
55 | static void async_float_handler (gdb_client_data arg); | |
b5a0ac70 SS |
56 | |
57 | /* Signal handlers. */ | |
c2c6d25f JM |
58 | static void handle_sigquit (int sig); |
59 | static void handle_sighup (int sig); | |
60 | static void handle_sigfpe (int sig); | |
d4f3574e | 61 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
c2c6d25f | 62 | static void handle_sigwinch (int sig); |
0f71a2f6 | 63 | #endif |
b5a0ac70 SS |
64 | |
65 | /* Functions to be invoked by the event loop in response to | |
66 | signals. */ | |
c2c6d25f JM |
67 | static void async_do_nothing (gdb_client_data); |
68 | static void async_disconnect (gdb_client_data); | |
69 | static void async_float_handler (gdb_client_data); | |
70 | static void async_stop_sig (gdb_client_data); | |
b5a0ac70 | 71 | |
b5a0ac70 SS |
72 | /* Readline offers an alternate interface, via callback |
73 | functions. These are all included in the file callback.c in the | |
74 | readline distribution. This file provides (mainly) a function, which | |
75 | the event loop uses as callback (i.e. event handler) whenever an event | |
76 | is detected on the standard input file descriptor. | |
77 | readline_callback_read_char is called (by the GDB event loop) whenever | |
78 | there is a new character ready on the input stream. This function | |
79 | incrementally builds a buffer internal to readline where it | |
80 | accumulates the line read up to the point of invocation. In the | |
81 | special case in which the character read is newline, the function | |
82 | invokes a GDB supplied callback routine, which does the processing of | |
83 | a full command line. This latter routine is the asynchronous analog | |
84 | of the old command_line_input in gdb. Instead of invoking (and waiting | |
85 | for) readline to read the command line and pass it back to | |
86 | command_loop for processing, the new command_line_handler function has | |
87 | the command line already available as its parameter. INPUT_HANDLER is | |
88 | to be set to the function that readline will invoke when a complete | |
89 | line of input is ready. CALL_READLINE is to be set to the function | |
90 | that readline offers as callback to the event_loop. */ | |
91 | ||
c2c6d25f JM |
92 | void (*input_handler) (char *); |
93 | void (*call_readline) (gdb_client_data); | |
b5a0ac70 SS |
94 | |
95 | /* Important variables for the event loop. */ | |
96 | ||
97 | /* This is used to determine if GDB is using the readline library or | |
98 | its own simplified form of readline. It is used by the asynchronous | |
0f71a2f6 | 99 | form of the set editing command. |
392a587b | 100 | ezannoni: as of 1999-04-29 I expect that this |
b5a0ac70 SS |
101 | variable will not be used after gdb is changed to use the event |
102 | loop as default engine, and event-top.c is merged into top.c. */ | |
103 | int async_command_editing_p; | |
104 | ||
105 | /* This variable contains the new prompt that the user sets with the | |
106 | set prompt command. */ | |
107 | char *new_async_prompt; | |
108 | ||
109 | /* This is the annotation suffix that will be used when the | |
110 | annotation_level is 2. */ | |
111 | char *async_annotation_suffix; | |
112 | ||
104c1213 JM |
113 | /* This is used to display the notification of the completion of an |
114 | asynchronous execution command. */ | |
115 | int exec_done_display_p = 0; | |
116 | ||
b5a0ac70 SS |
117 | /* This is the file descriptor for the input stream that GDB uses to |
118 | read commands from. */ | |
119 | int input_fd; | |
120 | ||
121 | /* This is the prompt stack. Prompts will be pushed on the stack as | |
122 | needed by the different 'kinds' of user inputs GDB is asking | |
123 | for. See event-loop.h. */ | |
124 | struct prompts the_prompts; | |
125 | ||
126 | /* signal handling variables */ | |
127 | /* Each of these is a pointer to a function that the event loop will | |
128 | invoke if the corresponding signal has received. The real signal | |
129 | handlers mark these functions as ready to be executed and the event | |
130 | loop, in a later iteration, calls them. See the function | |
131 | invoke_async_signal_handler. */ | |
0f71a2f6 | 132 | PTR sigint_token; |
b5a0ac70 | 133 | #ifdef SIGHUP |
0f71a2f6 | 134 | PTR sighup_token; |
b5a0ac70 | 135 | #endif |
0f71a2f6 JM |
136 | PTR sigquit_token; |
137 | PTR sigfpe_token; | |
b5a0ac70 | 138 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
0f71a2f6 | 139 | PTR sigwinch_token; |
b5a0ac70 | 140 | #endif |
0f71a2f6 JM |
141 | #ifdef STOP_SIGNAL |
142 | PTR sigtstp_token; | |
143 | #endif | |
144 | ||
b5a0ac70 SS |
145 | /* Structure to save a partially entered command. This is used when |
146 | the user types '\' at the end of a command line. This is necessary | |
147 | because each line of input is handled by a different call to | |
148 | command_line_handler, and normally there is no state retained | |
149 | between different calls. */ | |
150 | int more_to_come = 0; | |
151 | ||
152 | struct readline_input_state | |
153 | { | |
154 | char *linebuffer; | |
155 | char *linebuffer_ptr; | |
156 | } | |
157 | readline_input_state; | |
158 | \f | |
159 | ||
c2c6d25f JM |
160 | /* Wrapper function foe calling into the readline library. The event |
161 | loop expects the callback function to have a paramter, while readline | |
162 | expects none. */ | |
163 | static void | |
164 | rl_callback_read_char_wrapper (gdb_client_data client_data) | |
165 | { | |
166 | rl_callback_read_char (); | |
167 | } | |
168 | ||
b5a0ac70 | 169 | /* Initialize all the necessary variables, start the event loop, |
085dd6e6 | 170 | register readline, and stdin, start the loop. */ |
b5a0ac70 | 171 | void |
c2c6d25f | 172 | cli_command_loop (void) |
b5a0ac70 | 173 | { |
0f71a2f6 JM |
174 | int length; |
175 | char *a_prompt; | |
9e0b60a8 | 176 | char *gdb_prompt = get_prompt (); |
b5a0ac70 | 177 | |
0f71a2f6 JM |
178 | /* If we are using readline, set things up and display the first |
179 | prompt, otherwise just print the prompt. */ | |
180 | if (async_command_editing_p) | |
181 | { | |
182 | /* Tell readline what the prompt to display is and what function it | |
c5aa993b JM |
183 | will need to call after a whole line is read. This also displays |
184 | the first prompt. */ | |
9e0b60a8 | 185 | length = strlen (PREFIX (0)) + strlen (gdb_prompt) + strlen (SUFFIX (0)) + 1; |
0f71a2f6 JM |
186 | a_prompt = (char *) xmalloc (length); |
187 | strcpy (a_prompt, PREFIX (0)); | |
9e0b60a8 | 188 | strcat (a_prompt, gdb_prompt); |
0f71a2f6 JM |
189 | strcat (a_prompt, SUFFIX (0)); |
190 | rl_callback_handler_install (a_prompt, input_handler); | |
191 | } | |
192 | else | |
193 | display_gdb_prompt (0); | |
b5a0ac70 | 194 | |
085dd6e6 JM |
195 | /* Now it's time to start the event loop. */ |
196 | start_event_loop (); | |
b5a0ac70 SS |
197 | } |
198 | ||
199 | /* Change the function to be invoked every time there is a character | |
200 | ready on stdin. This is used when the user sets the editing off, | |
201 | therefore bypassing readline, and letting gdb handle the input | |
202 | itself, via gdb_readline2. Also it is used in the opposite case in | |
203 | which the user sets editing on again, by restoring readline | |
204 | handling of the input. */ | |
392a587b | 205 | static void |
c2c6d25f | 206 | change_line_handler (void) |
b5a0ac70 | 207 | { |
c2c6d25f JM |
208 | /* NOTE: this operates on input_fd, not instream. If we are reading |
209 | commands from a file, instream will point to the file. However in | |
210 | async mode, we always read commands from a file with editing | |
211 | off. This means that the 'set editing on/off' will have effect | |
212 | only on the interactive session. */ | |
213 | ||
b5a0ac70 SS |
214 | if (async_command_editing_p) |
215 | { | |
216 | /* Turn on editing by using readline. */ | |
c2c6d25f | 217 | call_readline = rl_callback_read_char_wrapper; |
0f71a2f6 | 218 | input_handler = command_line_handler; |
b5a0ac70 SS |
219 | } |
220 | else | |
221 | { | |
222 | /* Turn off editing by using gdb_readline2. */ | |
223 | rl_callback_handler_remove (); | |
224 | call_readline = gdb_readline2; | |
0f71a2f6 JM |
225 | |
226 | /* Set up the command handler as well, in case we are called as | |
c5aa993b | 227 | first thing from .gdbinit. */ |
0f71a2f6 | 228 | input_handler = command_line_handler; |
b5a0ac70 | 229 | } |
b5a0ac70 SS |
230 | } |
231 | ||
232 | /* Displays the prompt. The prompt that is displayed is the current | |
233 | top of the prompt stack, if the argument NEW_PROMPT is | |
234 | 0. Otherwise, it displays whatever NEW_PROMPT is. This is used | |
235 | after each gdb command has completed, and in the following cases: | |
0f71a2f6 JM |
236 | 1. when the user enters a command line which is ended by '\' |
237 | indicating that the command will continue on the next line. | |
b5a0ac70 | 238 | In that case the prompt that is displayed is the empty string. |
0f71a2f6 JM |
239 | 2. When the user is entering 'commands' for a breakpoint, or |
240 | actions for a tracepoint. In this case the prompt will be '>' | |
241 | 3. Other???? | |
b5a0ac70 SS |
242 | FIXME: 2. & 3. not implemented yet for async. */ |
243 | void | |
c2c6d25f | 244 | display_gdb_prompt (char *new_prompt) |
b5a0ac70 SS |
245 | { |
246 | int prompt_length = 0; | |
c5aa993b | 247 | char *gdb_prompt = get_prompt (); |
b5a0ac70 | 248 | |
6426a772 | 249 | if (target_executing && sync_execution) |
adf40b2e JM |
250 | { |
251 | /* This is to trick readline into not trying to display the | |
6426a772 JM |
252 | prompt. Even though we display the prompt using this |
253 | function, readline still tries to do its own display if we | |
254 | don't call rl_callback_handler_install and | |
255 | rl_callback_handler_remove (which readline detects because a | |
256 | global variable is not set). If readline did that, it could | |
257 | mess up gdb signal handlers for SIGINT. Readline assumes | |
258 | that between calls to rl_set_signals and rl_clear_signals gdb | |
259 | doesn't do anything with the signal handlers. Well, that's | |
260 | not the case, because when the target executes we change the | |
261 | SIGINT signal handler. If we allowed readline to display the | |
262 | prompt, the signal handler change would happen exactly | |
263 | between the calls to the above two functions. | |
264 | Calling rl_callback_handler_remove(), does the job. */ | |
adf40b2e JM |
265 | |
266 | rl_callback_handler_remove (); | |
267 | return; | |
268 | } | |
269 | ||
b5a0ac70 SS |
270 | if (!new_prompt) |
271 | { | |
272 | /* Just use the top of the prompt stack. */ | |
273 | prompt_length = strlen (PREFIX (0)) + | |
274 | strlen (SUFFIX (0)) + | |
9e0b60a8 | 275 | strlen (gdb_prompt) + 1; |
b5a0ac70 SS |
276 | |
277 | new_prompt = (char *) alloca (prompt_length); | |
278 | ||
279 | /* Prefix needs to have new line at end. */ | |
280 | strcpy (new_prompt, PREFIX (0)); | |
9e0b60a8 | 281 | strcat (new_prompt, gdb_prompt); |
b5a0ac70 SS |
282 | /* Suffix needs to have a new line at end and \032 \032 at |
283 | beginning. */ | |
284 | strcat (new_prompt, SUFFIX (0)); | |
285 | } | |
286 | ||
287 | if (async_command_editing_p) | |
288 | { | |
289 | rl_callback_handler_remove (); | |
290 | rl_callback_handler_install (new_prompt, input_handler); | |
291 | } | |
adf40b2e | 292 | /* new_prompt at this point can be the top of the stack or the one passed in */ |
b5a0ac70 SS |
293 | else if (new_prompt) |
294 | { | |
295 | /* Don't use a _filtered function here. It causes the assumed | |
296 | character position to be off, since the newline we read from | |
297 | the user is not accounted for. */ | |
298 | fputs_unfiltered (new_prompt, gdb_stdout); | |
299 | ||
300 | #ifdef MPW | |
301 | /* Move to a new line so the entered line doesn't have a prompt | |
302 | on the front of it. */ | |
303 | fputs_unfiltered ("\n", gdb_stdout); | |
304 | #endif /* MPW */ | |
305 | gdb_flush (gdb_stdout); | |
306 | } | |
307 | } | |
308 | ||
309 | /* Used when the user requests a different annotation level, with | |
310 | 'set annotate'. It pushes a new prompt (with prefix and suffix) on top | |
311 | of the prompt stack, if the annotation level desired is 2, otherwise | |
312 | it pops the top of the prompt stack when we want the annotation level | |
adf40b2e | 313 | to be the normal ones (1 or 0). */ |
392a587b | 314 | static void |
c2c6d25f | 315 | change_annotation_level (void) |
b5a0ac70 SS |
316 | { |
317 | char *prefix, *suffix; | |
318 | ||
319 | if (!PREFIX (0) || !PROMPT (0) || !SUFFIX (0)) | |
320 | { | |
321 | /* The prompt stack has not been initialized to "", we are | |
322 | using gdb w/o the --async switch */ | |
323 | warning ("Command has same effect as set annotate"); | |
324 | return; | |
325 | } | |
326 | ||
327 | if (annotation_level > 1) | |
328 | { | |
329 | if (!strcmp (PREFIX (0), "") && !strcmp (SUFFIX (0), "")) | |
330 | { | |
331 | /* Push a new prompt if the previous annotation_level was not >1. */ | |
332 | prefix = (char *) alloca (strlen (async_annotation_suffix) + 10); | |
333 | strcpy (prefix, "\n\032\032pre-"); | |
334 | strcat (prefix, async_annotation_suffix); | |
335 | strcat (prefix, "\n"); | |
336 | ||
337 | suffix = (char *) alloca (strlen (async_annotation_suffix) + 6); | |
338 | strcpy (suffix, "\n\032\032"); | |
339 | strcat (suffix, async_annotation_suffix); | |
340 | strcat (suffix, "\n"); | |
341 | ||
342 | push_prompt (prefix, (char *) 0, suffix); | |
343 | } | |
344 | } | |
345 | else | |
346 | { | |
347 | if (strcmp (PREFIX (0), "") && strcmp (SUFFIX (0), "")) | |
348 | { | |
349 | /* Pop the top of the stack, we are going back to annotation < 1. */ | |
350 | pop_prompt (); | |
351 | } | |
352 | } | |
353 | } | |
354 | ||
355 | /* Pushes a new prompt on the prompt stack. Each prompt has three | |
356 | parts: prefix, prompt, suffix. Usually prefix and suffix are empty | |
357 | strings, except when the annotation level is 2. Memory is allocated | |
358 | within savestring for the new prompt. */ | |
43ff13b4 | 359 | void |
c2c6d25f | 360 | push_prompt (char *prefix, char *prompt, char *suffix) |
b5a0ac70 SS |
361 | { |
362 | the_prompts.top++; | |
363 | PREFIX (0) = savestring (prefix, strlen (prefix)); | |
364 | ||
43ff13b4 JM |
365 | /* Note that this function is used by the set annotate 2 |
366 | command. This is why we take care of saving the old prompt | |
367 | in case a new one is not specified. */ | |
b5a0ac70 SS |
368 | if (prompt) |
369 | PROMPT (0) = savestring (prompt, strlen (prompt)); | |
370 | else | |
371 | PROMPT (0) = savestring (PROMPT (-1), strlen (PROMPT (-1))); | |
372 | ||
373 | SUFFIX (0) = savestring (suffix, strlen (suffix)); | |
374 | } | |
375 | ||
376 | /* Pops the top of the prompt stack, and frees the memory allocated for it. */ | |
43ff13b4 | 377 | void |
c2c6d25f | 378 | pop_prompt (void) |
b5a0ac70 | 379 | { |
43ff13b4 JM |
380 | /* If we are not during a 'synchronous' execution command, in which |
381 | case, the top prompt would be empty. */ | |
382 | if (strcmp (PROMPT (0), "")) | |
383 | /* This is for the case in which the prompt is set while the | |
384 | annotation level is 2. The top prompt will be changed, but when | |
385 | we return to annotation level < 2, we want that new prompt to be | |
386 | in effect, until the user does another 'set prompt'. */ | |
387 | if (strcmp (PROMPT (0), PROMPT (-1))) | |
388 | { | |
389 | free (PROMPT (-1)); | |
390 | PROMPT (-1) = savestring (PROMPT (0), strlen (PROMPT (0))); | |
391 | } | |
b5a0ac70 SS |
392 | |
393 | free (PREFIX (0)); | |
394 | free (PROMPT (0)); | |
395 | free (SUFFIX (0)); | |
396 | the_prompts.top--; | |
397 | } | |
c2c6d25f JM |
398 | |
399 | /* When there is an event ready on the stdin file desriptor, instead | |
400 | of calling readline directly throught the callback function, or | |
401 | instead of calling gdb_readline2, give gdb a chance to detect | |
402 | errors and do something. */ | |
403 | void | |
2acceee2 | 404 | stdin_event_handler (int error, gdb_client_data client_data) |
c2c6d25f JM |
405 | { |
406 | if (error) | |
407 | { | |
2acceee2 JM |
408 | printf_unfiltered ("error detected on stdin\n"); |
409 | delete_file_handler (input_fd); | |
c2c6d25f JM |
410 | discard_all_continuations (); |
411 | /* If stdin died, we may as well kill gdb. */ | |
c5394b80 | 412 | quit_command ((char *) 0, stdin == instream); |
c2c6d25f JM |
413 | } |
414 | else | |
6426a772 | 415 | (*call_readline) (client_data); |
c2c6d25f JM |
416 | } |
417 | ||
6426a772 JM |
418 | /* Re-enable stdin after the end of an execution command in |
419 | synchronous mode, or after an error from the target, and we aborted | |
420 | the exec operation. */ | |
421 | ||
422 | void | |
423 | async_enable_stdin (void *dummy) | |
424 | { | |
425 | /* See NOTE in async_disable_stdin() */ | |
426 | /* FIXME: cagney/1999-09-27: Call this before clearing | |
427 | sync_execution. Current target_terminal_ours() implementations | |
428 | check for sync_execution before switching the terminal. */ | |
429 | target_terminal_ours (); | |
430 | pop_prompt (); | |
431 | sync_execution = 0; | |
432 | } | |
433 | ||
434 | /* Disable reads from stdin (the console) marking the command as | |
435 | synchronous. */ | |
436 | ||
437 | void | |
438 | async_disable_stdin (void) | |
439 | { | |
440 | sync_execution = 1; | |
441 | push_prompt ("", "", ""); | |
442 | /* FIXME: cagney/1999-09-27: At present this call is technically | |
443 | redundant since infcmd.c and infrun.c both already call | |
444 | target_terminal_inferior(). As the terminal handling (in | |
445 | sync/async mode) is refined, the duplicate calls can be | |
446 | eliminated (Here or in infcmd.c/infrun.c). */ | |
447 | target_terminal_inferior (); | |
2acceee2 JM |
448 | /* Add the reinstate of stdin to the list of cleanups to be done |
449 | in case the target errors out and dies. These cleanups are also | |
450 | done in case of normal successful termination of the execution | |
451 | command, by complete_execution(). */ | |
6426a772 JM |
452 | make_exec_error_cleanup (async_enable_stdin, NULL); |
453 | } | |
b5a0ac70 | 454 | \f |
6426a772 | 455 | |
b5a0ac70 SS |
456 | /* Handles a gdb command. This function is called by |
457 | command_line_handler, which has processed one or more input lines | |
458 | into COMMAND. */ | |
392a587b | 459 | /* NOTE: 1999-04-30 This is the asynchronous version of the command_loop |
b5a0ac70 SS |
460 | function. The command_loop function will be obsolete when we |
461 | switch to use the event loop at every execution of gdb. */ | |
392a587b | 462 | static void |
c2c6d25f | 463 | command_handler (char *command) |
b5a0ac70 SS |
464 | { |
465 | struct cleanup *old_chain; | |
466 | int stdin_is_tty = ISATTY (stdin); | |
43ff13b4 JM |
467 | struct continuation_arg *arg1; |
468 | struct continuation_arg *arg2; | |
b5a0ac70 SS |
469 | long time_at_cmd_start; |
470 | #ifdef HAVE_SBRK | |
471 | long space_at_cmd_start = 0; | |
472 | #endif | |
473 | extern int display_time; | |
474 | extern int display_space; | |
475 | ||
476 | #if defined(TUI) | |
477 | extern int insert_mode; | |
478 | #endif | |
479 | ||
480 | quit_flag = 0; | |
481 | if (instream == stdin && stdin_is_tty) | |
482 | reinitialize_more_filter (); | |
483 | old_chain = make_cleanup ((make_cleanup_func) command_loop_marker, 0); | |
484 | ||
485 | #if defined(TUI) | |
486 | insert_mode = 0; | |
487 | #endif | |
488 | /* If readline returned a NULL command, it means that the | |
489 | connection with the terminal is gone. This happens at the | |
490 | end of a testsuite run, after Expect has hung up | |
491 | but GDB is still alive. In such a case, we just quit gdb | |
492 | killing the inferior program too. */ | |
493 | if (command == 0) | |
494 | quit_command ((char *) 0, stdin == instream); | |
495 | ||
496 | time_at_cmd_start = get_run_time (); | |
497 | ||
498 | if (display_space) | |
499 | { | |
500 | #ifdef HAVE_SBRK | |
501 | extern char **environ; | |
502 | char *lim = (char *) sbrk (0); | |
503 | ||
504 | space_at_cmd_start = (long) (lim - (char *) &environ); | |
505 | #endif | |
506 | } | |
507 | ||
508 | execute_command (command, instream == stdin); | |
c5aa993b | 509 | |
43ff13b4 JM |
510 | /* Set things up for this function to be compete later, once the |
511 | executin has completed, if we are doing an execution command, | |
512 | otherwise, just go ahead and finish. */ | |
6426a772 | 513 | if (target_can_async_p () && target_executing) |
43ff13b4 | 514 | { |
c5aa993b | 515 | arg1 = |
43ff13b4 | 516 | (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg)); |
c5aa993b | 517 | arg2 = |
43ff13b4 JM |
518 | (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg)); |
519 | arg1->next = arg2; | |
520 | arg2->next = NULL; | |
521 | arg1->data = (PTR) time_at_cmd_start; | |
522 | arg2->data = (PTR) space_at_cmd_start; | |
523 | add_continuation (command_line_handler_continuation, arg1); | |
524 | } | |
b5a0ac70 | 525 | |
43ff13b4 JM |
526 | /* Do any commands attached to breakpoint we stopped at. Only if we |
527 | are always running synchronously. Or if we have just executed a | |
528 | command that doesn't start the target. */ | |
6426a772 | 529 | if (!target_can_async_p () || !target_executing) |
43ff13b4 JM |
530 | { |
531 | bpstat_do_actions (&stop_bpstat); | |
532 | do_cleanups (old_chain); | |
c5aa993b | 533 | |
43ff13b4 JM |
534 | if (display_time) |
535 | { | |
536 | long cmd_time = get_run_time () - time_at_cmd_start; | |
537 | ||
538 | printf_unfiltered ("Command execution time: %ld.%06ld\n", | |
539 | cmd_time / 1000000, cmd_time % 1000000); | |
540 | } | |
541 | ||
542 | if (display_space) | |
543 | { | |
544 | #ifdef HAVE_SBRK | |
545 | extern char **environ; | |
546 | char *lim = (char *) sbrk (0); | |
547 | long space_now = lim - (char *) &environ; | |
548 | long space_diff = space_now - space_at_cmd_start; | |
549 | ||
550 | printf_unfiltered ("Space used: %ld (%c%ld for this command)\n", | |
551 | space_now, | |
552 | (space_diff >= 0 ? '+' : '-'), | |
553 | space_diff); | |
554 | #endif | |
555 | } | |
556 | } | |
557 | } | |
558 | ||
559 | /* Do any commands attached to breakpoint we stopped at. Only if we | |
560 | are always running synchronously. Or if we have just executed a | |
561 | command that doesn't start the target. */ | |
562 | void | |
c2c6d25f | 563 | command_line_handler_continuation (struct continuation_arg *arg) |
c5aa993b | 564 | { |
43ff13b4 JM |
565 | extern int display_time; |
566 | extern int display_space; | |
567 | ||
568 | long time_at_cmd_start = (long) arg->data; | |
569 | long space_at_cmd_start = (long) arg->next->data; | |
b5a0ac70 | 570 | |
43ff13b4 | 571 | bpstat_do_actions (&stop_bpstat); |
c5aa993b JM |
572 | /*do_cleanups (old_chain); *//*?????FIXME????? */ |
573 | ||
b5a0ac70 SS |
574 | if (display_time) |
575 | { | |
576 | long cmd_time = get_run_time () - time_at_cmd_start; | |
577 | ||
578 | printf_unfiltered ("Command execution time: %ld.%06ld\n", | |
579 | cmd_time / 1000000, cmd_time % 1000000); | |
580 | } | |
b5a0ac70 SS |
581 | if (display_space) |
582 | { | |
583 | #ifdef HAVE_SBRK | |
584 | extern char **environ; | |
585 | char *lim = (char *) sbrk (0); | |
586 | long space_now = lim - (char *) &environ; | |
587 | long space_diff = space_now - space_at_cmd_start; | |
588 | ||
589 | printf_unfiltered ("Space used: %ld (%c%ld for this command)\n", | |
590 | space_now, | |
591 | (space_diff >= 0 ? '+' : '-'), | |
592 | space_diff); | |
593 | #endif | |
594 | } | |
595 | } | |
596 | ||
597 | /* Handle a complete line of input. This is called by the callback | |
598 | mechanism within the readline library. Deal with incomplete commands | |
599 | as well, by saving the partial input in a global buffer. */ | |
600 | ||
392a587b | 601 | /* NOTE: 1999-04-30 This is the asynchronous version of the |
b5a0ac70 SS |
602 | command_line_input function. command_line_input will become |
603 | obsolete once we use the event loop as the default mechanism in | |
604 | GDB. */ | |
605 | static void | |
c2c6d25f | 606 | command_line_handler (char *rl) |
b5a0ac70 SS |
607 | { |
608 | static char *linebuffer = 0; | |
609 | static unsigned linelength = 0; | |
610 | register char *p; | |
611 | char *p1; | |
b5a0ac70 SS |
612 | extern char *line; |
613 | extern int linesize; | |
614 | char *nline; | |
615 | char got_eof = 0; | |
616 | ||
617 | ||
618 | int repeat = (instream == stdin); | |
619 | ||
620 | if (annotation_level > 1 && instream == stdin) | |
621 | { | |
622 | printf_unfiltered ("\n\032\032post-"); | |
623 | printf_unfiltered (async_annotation_suffix); | |
624 | printf_unfiltered ("\n"); | |
625 | } | |
626 | ||
627 | if (linebuffer == 0) | |
628 | { | |
629 | linelength = 80; | |
630 | linebuffer = (char *) xmalloc (linelength); | |
631 | } | |
632 | ||
633 | p = linebuffer; | |
634 | ||
635 | if (more_to_come) | |
636 | { | |
637 | strcpy (linebuffer, readline_input_state.linebuffer); | |
638 | p = readline_input_state.linebuffer_ptr; | |
639 | free (readline_input_state.linebuffer); | |
640 | more_to_come = 0; | |
adf40b2e | 641 | pop_prompt (); |
b5a0ac70 SS |
642 | } |
643 | ||
644 | #ifdef STOP_SIGNAL | |
645 | if (job_control) | |
0f71a2f6 | 646 | signal (STOP_SIGNAL, handle_stop_sig); |
b5a0ac70 SS |
647 | #endif |
648 | ||
649 | /* Make sure that all output has been output. Some machines may let | |
650 | you get away with leaving out some of the gdb_flush, but not all. */ | |
651 | wrap_here (""); | |
652 | gdb_flush (gdb_stdout); | |
653 | gdb_flush (gdb_stderr); | |
654 | ||
655 | if (source_file_name != NULL) | |
656 | { | |
657 | ++source_line_number; | |
658 | sprintf (source_error, | |
659 | "%s%s:%d: Error in sourced command file:\n", | |
660 | source_pre_error, | |
661 | source_file_name, | |
662 | source_line_number); | |
663 | error_pre_print = source_error; | |
664 | } | |
665 | ||
666 | /* If we are in this case, then command_handler will call quit | |
667 | and exit from gdb. */ | |
668 | if (!rl || rl == (char *) EOF) | |
669 | { | |
670 | got_eof = 1; | |
671 | command_handler (0); | |
672 | } | |
673 | if (strlen (rl) + 1 + (p - linebuffer) > linelength) | |
674 | { | |
675 | linelength = strlen (rl) + 1 + (p - linebuffer); | |
676 | nline = (char *) xrealloc (linebuffer, linelength); | |
677 | p += nline - linebuffer; | |
678 | linebuffer = nline; | |
679 | } | |
680 | p1 = rl; | |
681 | /* Copy line. Don't copy null at end. (Leaves line alone | |
682 | if this was just a newline) */ | |
683 | while (*p1) | |
684 | *p++ = *p1++; | |
685 | ||
686 | free (rl); /* Allocated in readline. */ | |
687 | ||
a0b3c4fd | 688 | if (*(p - 1) == '\\') |
b5a0ac70 | 689 | { |
b5a0ac70 SS |
690 | p--; /* Put on top of '\'. */ |
691 | ||
692 | if (*p == '\\') | |
693 | { | |
694 | readline_input_state.linebuffer = savestring (linebuffer, | |
695 | strlen (linebuffer)); | |
696 | readline_input_state.linebuffer_ptr = p; | |
697 | ||
698 | /* We will not invoke a execute_command if there is more | |
699 | input expected to complete the command. So, we need to | |
700 | print an empty prompt here. */ | |
b5a0ac70 | 701 | more_to_come = 1; |
adf40b2e JM |
702 | push_prompt ("", "", ""); |
703 | display_gdb_prompt (0); | |
704 | return; | |
b5a0ac70 SS |
705 | } |
706 | } | |
707 | ||
708 | #ifdef STOP_SIGNAL | |
709 | if (job_control) | |
710 | signal (STOP_SIGNAL, SIG_DFL); | |
711 | #endif | |
712 | ||
713 | #define SERVER_COMMAND_LENGTH 7 | |
714 | server_command = | |
715 | (p - linebuffer > SERVER_COMMAND_LENGTH) | |
716 | && STREQN (linebuffer, "server ", SERVER_COMMAND_LENGTH); | |
717 | if (server_command) | |
718 | { | |
719 | /* Note that we don't set `line'. Between this and the check in | |
720 | dont_repeat, this insures that repeating will still do the | |
721 | right thing. */ | |
722 | *p = '\0'; | |
723 | command_handler (linebuffer + SERVER_COMMAND_LENGTH); | |
724 | display_gdb_prompt (0); | |
725 | return; | |
726 | } | |
727 | ||
728 | /* Do history expansion if that is wished. */ | |
729 | if (history_expansion_p && instream == stdin | |
730 | && ISATTY (instream)) | |
731 | { | |
732 | char *history_value; | |
733 | int expanded; | |
734 | ||
735 | *p = '\0'; /* Insert null now. */ | |
736 | expanded = history_expand (linebuffer, &history_value); | |
737 | if (expanded) | |
738 | { | |
739 | /* Print the changes. */ | |
740 | printf_unfiltered ("%s\n", history_value); | |
741 | ||
742 | /* If there was an error, call this function again. */ | |
743 | if (expanded < 0) | |
744 | { | |
745 | free (history_value); | |
746 | return; | |
747 | } | |
748 | if (strlen (history_value) > linelength) | |
749 | { | |
750 | linelength = strlen (history_value) + 1; | |
751 | linebuffer = (char *) xrealloc (linebuffer, linelength); | |
752 | } | |
753 | strcpy (linebuffer, history_value); | |
754 | p = linebuffer + strlen (linebuffer); | |
755 | free (history_value); | |
756 | } | |
757 | } | |
758 | ||
759 | /* If we just got an empty line, and that is supposed | |
760 | to repeat the previous command, return the value in the | |
761 | global buffer. */ | |
762 | if (repeat && p == linebuffer && *p != '\\') | |
763 | { | |
764 | command_handler (line); | |
765 | display_gdb_prompt (0); | |
766 | return; | |
767 | } | |
768 | ||
769 | for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++); | |
770 | if (repeat && !*p1) | |
771 | { | |
772 | command_handler (line); | |
773 | display_gdb_prompt (0); | |
774 | return; | |
775 | } | |
776 | ||
777 | *p = 0; | |
778 | ||
779 | /* Add line to history if appropriate. */ | |
780 | if (instream == stdin | |
781 | && ISATTY (stdin) && *linebuffer) | |
782 | add_history (linebuffer); | |
783 | ||
784 | /* Note: lines consisting solely of comments are added to the command | |
785 | history. This is useful when you type a command, and then | |
786 | realize you don't want to execute it quite yet. You can comment | |
787 | out the command and then later fetch it from the value history | |
788 | and remove the '#'. The kill ring is probably better, but some | |
789 | people are in the habit of commenting things out. */ | |
790 | if (*p1 == '#') | |
791 | *p1 = '\0'; /* Found a comment. */ | |
792 | ||
793 | /* Save into global buffer if appropriate. */ | |
794 | if (repeat) | |
795 | { | |
796 | if (linelength > linesize) | |
797 | { | |
798 | line = xrealloc (line, linelength); | |
799 | linesize = linelength; | |
800 | } | |
801 | strcpy (line, linebuffer); | |
802 | if (!more_to_come) | |
803 | { | |
804 | command_handler (line); | |
805 | display_gdb_prompt (0); | |
806 | } | |
807 | return; | |
808 | } | |
809 | ||
810 | command_handler (linebuffer); | |
811 | display_gdb_prompt (0); | |
812 | return; | |
813 | } | |
814 | ||
815 | /* Does reading of input from terminal w/o the editing features | |
816 | provided by the readline library. */ | |
817 | ||
392a587b | 818 | /* NOTE: 1999-04-30 Asynchronous version of gdb_readline. gdb_readline |
b5a0ac70 SS |
819 | will become obsolete when the event loop is made the default |
820 | execution for gdb. */ | |
085dd6e6 | 821 | void |
c2c6d25f | 822 | gdb_readline2 (gdb_client_data client_data) |
b5a0ac70 SS |
823 | { |
824 | int c; | |
825 | char *result; | |
826 | int input_index = 0; | |
827 | int result_size = 80; | |
7be570e7 JM |
828 | static int done_once = 0; |
829 | ||
830 | /* Unbuffer the input stream, so that, later on, the calls to fgetc | |
831 | fetch only one char at the time from the stream. The fgetc's will | |
832 | get up to the first newline, but there may be more chars in the | |
833 | stream after '\n'. If we buffer the input and fgetc drains the | |
834 | stream, getting stuff beyond the newline as well, a select, done | |
835 | afterwards will not trigger. */ | |
836 | if (!done_once && !ISATTY (instream)) | |
837 | { | |
838 | setbuf (instream, NULL); | |
839 | done_once = 1; | |
840 | } | |
b5a0ac70 SS |
841 | |
842 | result = (char *) xmalloc (result_size); | |
843 | ||
844 | /* We still need the while loop here, even though it would seem | |
845 | obvious to invoke gdb_readline2 at every character entered. If | |
846 | not using the readline library, the terminal is in cooked mode, | |
847 | which sends the characters all at once. Poll will notice that the | |
848 | input fd has changed state only after enter is pressed. At this | |
849 | point we still need to fetch all the chars entered. */ | |
850 | ||
851 | while (1) | |
852 | { | |
853 | /* Read from stdin if we are executing a user defined command. | |
854 | This is the right thing for prompt_for_continue, at least. */ | |
855 | c = fgetc (instream ? instream : stdin); | |
856 | ||
857 | if (c == EOF) | |
858 | { | |
859 | if (input_index > 0) | |
860 | /* The last line does not end with a newline. Return it, and | |
861 | if we are called again fgetc will still return EOF and | |
862 | we'll return NULL then. */ | |
863 | break; | |
864 | free (result); | |
0f71a2f6 | 865 | (*input_handler) (0); |
b5a0ac70 SS |
866 | } |
867 | ||
868 | if (c == '\n') | |
869 | #ifndef CRLF_SOURCE_FILES | |
870 | break; | |
871 | #else | |
872 | { | |
873 | if (input_index > 0 && result[input_index - 1] == '\r') | |
874 | input_index--; | |
875 | break; | |
876 | } | |
877 | #endif | |
878 | ||
879 | result[input_index++] = c; | |
880 | while (input_index >= result_size) | |
881 | { | |
882 | result_size *= 2; | |
883 | result = (char *) xrealloc (result, result_size); | |
884 | } | |
885 | } | |
886 | ||
887 | result[input_index++] = '\0'; | |
0f71a2f6 | 888 | (*input_handler) (result); |
b5a0ac70 SS |
889 | } |
890 | \f | |
891 | ||
892 | /* Initialization of signal handlers and tokens. There is a function | |
893 | handle_sig* for each of the signals GDB cares about. Specifically: | |
894 | SIGINT, SIGFPE, SIGQUIT, SIGTSTP, SIGHUP, SIGWINCH. These | |
895 | functions are the actual signal handlers associated to the signals | |
896 | via calls to signal(). The only job for these functions is to | |
897 | enqueue the appropriate event/procedure with the event loop. Such | |
898 | procedures are the old signal handlers. The event loop will take | |
899 | care of invoking the queued procedures to perform the usual tasks | |
900 | associated with the reception of the signal. */ | |
392a587b | 901 | /* NOTE: 1999-04-30 This is the asynchronous version of init_signals. |
b5a0ac70 SS |
902 | init_signals will become obsolete as we move to have to event loop |
903 | as the default for gdb. */ | |
904 | void | |
c2c6d25f | 905 | async_init_signals (void) |
c5aa993b | 906 | { |
b5a0ac70 SS |
907 | signal (SIGINT, handle_sigint); |
908 | sigint_token = | |
0f71a2f6 | 909 | create_async_signal_handler (async_request_quit, NULL); |
b5a0ac70 SS |
910 | |
911 | /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed | |
912 | to the inferior and breakpoints will be ignored. */ | |
913 | #ifdef SIGTRAP | |
914 | signal (SIGTRAP, SIG_DFL); | |
915 | #endif | |
916 | ||
917 | /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get | |
918 | passed to the inferior, which we don't want. It would be | |
919 | possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but | |
920 | on BSD4.3 systems using vfork, that can affect the | |
921 | GDB process as well as the inferior (the signal handling tables | |
922 | might be in memory, shared between the two). Since we establish | |
923 | a handler for SIGQUIT, when we call exec it will set the signal | |
924 | to SIG_DFL for us. */ | |
925 | signal (SIGQUIT, handle_sigquit); | |
926 | sigquit_token = | |
0f71a2f6 | 927 | create_async_signal_handler (async_do_nothing, NULL); |
b5a0ac70 SS |
928 | #ifdef SIGHUP |
929 | if (signal (SIGHUP, handle_sighup) != SIG_IGN) | |
930 | sighup_token = | |
0f71a2f6 | 931 | create_async_signal_handler (async_disconnect, NULL); |
b5a0ac70 SS |
932 | else |
933 | sighup_token = | |
0f71a2f6 | 934 | create_async_signal_handler (async_do_nothing, NULL); |
b5a0ac70 SS |
935 | #endif |
936 | signal (SIGFPE, handle_sigfpe); | |
937 | sigfpe_token = | |
0f71a2f6 | 938 | create_async_signal_handler (async_float_handler, NULL); |
b5a0ac70 SS |
939 | |
940 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) | |
941 | signal (SIGWINCH, handle_sigwinch); | |
942 | sigwinch_token = | |
0f71a2f6 | 943 | create_async_signal_handler (SIGWINCH_HANDLER, NULL); |
b5a0ac70 | 944 | #endif |
0f71a2f6 JM |
945 | #ifdef STOP_SIGNAL |
946 | sigtstp_token = | |
947 | create_async_signal_handler (async_stop_sig, NULL); | |
948 | #endif | |
949 | ||
950 | } | |
951 | ||
c5aa993b | 952 | void |
c2c6d25f | 953 | mark_async_signal_handler_wrapper (PTR token) |
0f71a2f6 | 954 | { |
c2c6d25f | 955 | mark_async_signal_handler ((struct async_signal_handler *) token); |
b5a0ac70 SS |
956 | } |
957 | ||
958 | /* Tell the event loop what to do if SIGINT is received. | |
959 | See event-signal.c. */ | |
c5aa993b | 960 | void |
c2c6d25f | 961 | handle_sigint (int sig) |
b5a0ac70 SS |
962 | { |
963 | signal (sig, handle_sigint); | |
964 | ||
965 | /* If immediate_quit is set, we go ahead and process the SIGINT right | |
966 | away, even if we usually would defer this to the event loop. The | |
967 | assumption here is that it is safe to process ^C immediately if | |
968 | immediate_quit is set. If we didn't, SIGINT would be really | |
969 | processed only the next time through the event loop. To get to | |
970 | that point, though, the command that we want to interrupt needs to | |
971 | finish first, which is unacceptable. */ | |
972 | if (immediate_quit) | |
0f71a2f6 | 973 | async_request_quit (0); |
b5a0ac70 SS |
974 | else |
975 | /* If immediate quit is not set, we process SIGINT the next time | |
976 | through the loop, which is fine. */ | |
0f71a2f6 | 977 | mark_async_signal_handler_wrapper (sigint_token); |
b5a0ac70 SS |
978 | } |
979 | ||
980 | /* Do the quit. All the checks have been done by the caller. */ | |
c5aa993b | 981 | void |
c2c6d25f | 982 | async_request_quit (gdb_client_data arg) |
b5a0ac70 SS |
983 | { |
984 | quit_flag = 1; | |
985 | #ifdef REQUEST_QUIT | |
986 | REQUEST_QUIT; | |
987 | #else | |
988 | quit (); | |
989 | #endif | |
990 | } | |
991 | ||
992 | /* Tell the event loop what to do if SIGQUIT is received. | |
993 | See event-signal.c. */ | |
c5aa993b | 994 | static void |
c2c6d25f | 995 | handle_sigquit (int sig) |
b5a0ac70 | 996 | { |
0f71a2f6 | 997 | mark_async_signal_handler_wrapper (sigquit_token); |
b5a0ac70 SS |
998 | signal (sig, handle_sigquit); |
999 | } | |
1000 | ||
1001 | /* Called by the event loop in response to a SIGQUIT. */ | |
c5aa993b | 1002 | static void |
c2c6d25f | 1003 | async_do_nothing (gdb_client_data arg) |
b5a0ac70 SS |
1004 | { |
1005 | /* Empty function body. */ | |
1006 | } | |
1007 | ||
1008 | #ifdef SIGHUP | |
1009 | /* Tell the event loop what to do if SIGHUP is received. | |
1010 | See event-signal.c. */ | |
c5aa993b | 1011 | static void |
b5a0ac70 SS |
1012 | handle_sighup (sig) |
1013 | int sig; | |
1014 | { | |
0f71a2f6 | 1015 | mark_async_signal_handler_wrapper (sighup_token); |
b5a0ac70 SS |
1016 | signal (sig, handle_sighup); |
1017 | } | |
1018 | ||
0f71a2f6 | 1019 | /* Called by the event loop to process a SIGHUP */ |
c5aa993b | 1020 | static void |
c2c6d25f | 1021 | async_disconnect (gdb_client_data arg) |
b5a0ac70 SS |
1022 | { |
1023 | catch_errors (quit_cover, NULL, | |
1024 | "Could not kill the program being debugged", | |
1025 | RETURN_MASK_ALL); | |
1026 | signal (SIGHUP, SIG_DFL); /*FIXME: ??????????? */ | |
1027 | kill (getpid (), SIGHUP); | |
1028 | } | |
1029 | #endif | |
1030 | ||
0f71a2f6 | 1031 | #ifdef STOP_SIGNAL |
c5aa993b | 1032 | void |
c2c6d25f | 1033 | handle_stop_sig (int sig) |
0f71a2f6 | 1034 | { |
c5aa993b JM |
1035 | mark_async_signal_handler_wrapper (sigtstp_token); |
1036 | signal (sig, handle_stop_sig); | |
0f71a2f6 JM |
1037 | } |
1038 | ||
1039 | static void | |
c2c6d25f | 1040 | async_stop_sig (gdb_client_data arg) |
0f71a2f6 | 1041 | { |
c5aa993b | 1042 | char *prompt = get_prompt (); |
0f71a2f6 JM |
1043 | #if STOP_SIGNAL == SIGTSTP |
1044 | signal (SIGTSTP, SIG_DFL); | |
2acceee2 JM |
1045 | #if HAVE_SIGPROCMASK |
1046 | { | |
1047 | sigset_t zero; | |
1048 | sigemptyset (&zero); | |
1049 | sigprocmask (SIG_SETMASK, &zero, 0); | |
1050 | } | |
1051 | #else | |
0f71a2f6 | 1052 | sigsetmask (0); |
2acceee2 | 1053 | #endif |
0f71a2f6 JM |
1054 | kill (getpid (), SIGTSTP); |
1055 | signal (SIGTSTP, handle_stop_sig); | |
1056 | #else | |
1057 | signal (STOP_SIGNAL, handle_stop_sig); | |
1058 | #endif | |
1059 | printf_unfiltered ("%s", prompt); | |
1060 | gdb_flush (gdb_stdout); | |
1061 | ||
1062 | /* Forget about any previous command -- null line now will do nothing. */ | |
1063 | dont_repeat (); | |
1064 | } | |
1065 | #endif /* STOP_SIGNAL */ | |
1066 | ||
b5a0ac70 SS |
1067 | /* Tell the event loop what to do if SIGFPE is received. |
1068 | See event-signal.c. */ | |
c5aa993b | 1069 | static void |
c2c6d25f | 1070 | handle_sigfpe (int sig) |
b5a0ac70 | 1071 | { |
0f71a2f6 | 1072 | mark_async_signal_handler_wrapper (sigfpe_token); |
b5a0ac70 SS |
1073 | signal (sig, handle_sigfpe); |
1074 | } | |
1075 | ||
1076 | /* Event loop will call this functin to process a SIGFPE. */ | |
c5aa993b | 1077 | static void |
c2c6d25f | 1078 | async_float_handler (gdb_client_data arg) |
b5a0ac70 SS |
1079 | { |
1080 | /* This message is based on ANSI C, section 4.7. Note that integer | |
1081 | divide by zero causes this, so "float" is a misnomer. */ | |
1082 | error ("Erroneous arithmetic operation."); | |
1083 | } | |
1084 | ||
1085 | /* Tell the event loop what to do if SIGWINCH is received. | |
1086 | See event-signal.c. */ | |
1087 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) | |
c5aa993b | 1088 | static void |
c2c6d25f | 1089 | handle_sigwinch (int sig) |
b5a0ac70 | 1090 | { |
0f71a2f6 | 1091 | mark_async_signal_handler_wrapper (sigwinch_token); |
b5a0ac70 SS |
1092 | signal (sig, handle_sigwinch); |
1093 | } | |
1094 | #endif | |
1095 | \f | |
1096 | ||
1097 | /* Called by do_setshow_command. */ | |
1098 | /* ARGSUSED */ | |
1099 | void | |
c2c6d25f | 1100 | set_async_editing_command (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 SS |
1101 | { |
1102 | change_line_handler (); | |
1103 | } | |
1104 | ||
1105 | /* Called by do_setshow_command. */ | |
1106 | /* ARGSUSED */ | |
1107 | void | |
c2c6d25f | 1108 | set_async_annotation_level (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 SS |
1109 | { |
1110 | change_annotation_level (); | |
1111 | } | |
1112 | ||
1113 | /* Called by do_setshow_command. */ | |
1114 | /* ARGSUSED */ | |
1115 | void | |
c2c6d25f | 1116 | set_async_prompt (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 SS |
1117 | { |
1118 | PROMPT (0) = savestring (new_async_prompt, strlen (new_async_prompt)); | |
1119 | } | |
1120 | ||
0f71a2f6 JM |
1121 | /* Set things up for readline to be invoked via the alternate |
1122 | interface, i.e. via a callback function (rl_callback_read_char), | |
c5aa993b | 1123 | and hook up instream to the event loop. */ |
0f71a2f6 | 1124 | void |
c2c6d25f | 1125 | _initialize_event_loop (void) |
0f71a2f6 | 1126 | { |
6426a772 | 1127 | if (event_loop_p) |
9e0b60a8 JM |
1128 | { |
1129 | /* When a character is detected on instream by select or poll, | |
c5aa993b | 1130 | readline will be invoked via this callback function. */ |
c2c6d25f | 1131 | call_readline = rl_callback_read_char_wrapper; |
9e0b60a8 JM |
1132 | |
1133 | /* When readline has read an end-of-line character, it passes | |
c5aa993b JM |
1134 | the complete line to gdb for processing. command_line_handler |
1135 | is the function that does this. */ | |
9e0b60a8 JM |
1136 | input_handler = command_line_handler; |
1137 | ||
1138 | /* Tell readline to use the same input stream that gdb uses. */ | |
1139 | rl_instream = instream; | |
1140 | ||
1141 | /* Get a file descriptor for the input stream, so that we can | |
085dd6e6 | 1142 | register it with the event loop. */ |
9e0b60a8 JM |
1143 | input_fd = fileno (instream); |
1144 | ||
085dd6e6 JM |
1145 | /* Tell gdb to use the cli_command_loop as the main loop. */ |
1146 | command_loop_hook = cli_command_loop; | |
1147 | ||
9e0b60a8 JM |
1148 | /* Now we need to create the event sources for the input file |
1149 | descriptor. */ | |
1150 | /* At this point in time, this is the only event source that we | |
c5aa993b JM |
1151 | register with the even loop. Another source is going to be |
1152 | the target program (inferior), but that must be registered | |
1153 | only when it actually exists (I.e. after we say 'run' or | |
1154 | after we connect to a remote target. */ | |
c2c6d25f | 1155 | add_file_handler (input_fd, stdin_event_handler, 0); |
c5aa993b | 1156 | |
085dd6e6 | 1157 | /* Tell gdb that we will be using the readline library. This |
c5aa993b JM |
1158 | could be overwritten by a command in .gdbinit like 'set |
1159 | editing on' or 'off'. */ | |
085dd6e6 | 1160 | async_command_editing_p = 1; |
9e0b60a8 | 1161 | } |
0f71a2f6 | 1162 | } |