Commit | Line | Data |
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b5a0ac70 | 1 | /* Top level stuff for GDB, the GNU debugger. |
637537d0 AC |
2 | |
3 | Copyright 1999, 2000, 2001, 2002, 2004, 2005 Free Software | |
4 | Foundation, Inc. | |
5 | ||
b5a0ac70 SS |
6 | Written by Elena Zannoni <ezannoni@cygnus.com> of Cygnus Solutions. |
7 | ||
8 | This file is part of GDB. | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program; if not, write to the Free Software | |
c5aa993b JM |
22 | Foundation, Inc., 59 Temple Place - Suite 330, |
23 | Boston, MA 02111-1307, USA. */ | |
b5a0ac70 SS |
24 | |
25 | #include "defs.h" | |
0f71a2f6 | 26 | #include "top.h" |
b5a0ac70 | 27 | #include "inferior.h" |
e514a9d6 | 28 | #include "target.h" |
c5aa993b | 29 | #include "terminal.h" /* for job_control */ |
9e0b60a8 | 30 | #include "event-loop.h" |
c2c6d25f | 31 | #include "event-top.h" |
4389a95a | 32 | #include "interps.h" |
042be3a9 | 33 | #include <signal.h> |
60250e8b | 34 | #include "exceptions.h" |
b5a0ac70 | 35 | |
104c1213 JM |
36 | /* For dont_repeat() */ |
37 | #include "gdbcmd.h" | |
38 | ||
b5a0ac70 | 39 | /* readline include files */ |
dbda9972 AC |
40 | #include "readline/readline.h" |
41 | #include "readline/history.h" | |
b5a0ac70 SS |
42 | |
43 | /* readline defines this. */ | |
44 | #undef savestring | |
45 | ||
c2c6d25f JM |
46 | static void rl_callback_read_char_wrapper (gdb_client_data client_data); |
47 | static void command_line_handler (char *rl); | |
48 | static void command_line_handler_continuation (struct continuation_arg *arg); | |
49 | static void change_line_handler (void); | |
50 | static void change_annotation_level (void); | |
51 | static void command_handler (char *command); | |
c2c6d25f JM |
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. */ | |
97bb9d91 | 132 | void *sigint_token; |
b5a0ac70 | 133 | #ifdef SIGHUP |
97bb9d91 | 134 | void *sighup_token; |
b5a0ac70 | 135 | #endif |
97bb9d91 EZ |
136 | void *sigquit_token; |
137 | void *sigfpe_token; | |
b5a0ac70 | 138 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
97bb9d91 | 139 | void *sigwinch_token; |
b5a0ac70 | 140 | #endif |
0f71a2f6 | 141 | #ifdef STOP_SIGNAL |
97bb9d91 | 142 | void *sigtstp_token; |
0f71a2f6 JM |
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; | |
467d8519 TT |
158 | |
159 | /* This hook is called by rl_callback_read_char_wrapper after each | |
160 | character is processed. */ | |
161 | void (*after_char_processing_hook) (); | |
b5a0ac70 SS |
162 | \f |
163 | ||
701f9765 | 164 | /* Wrapper function for calling into the readline library. The event |
c2c6d25f JM |
165 | loop expects the callback function to have a paramter, while readline |
166 | expects none. */ | |
167 | static void | |
168 | rl_callback_read_char_wrapper (gdb_client_data client_data) | |
169 | { | |
170 | rl_callback_read_char (); | |
467d8519 TT |
171 | if (after_char_processing_hook) |
172 | (*after_char_processing_hook) (); | |
c2c6d25f JM |
173 | } |
174 | ||
b5a0ac70 | 175 | /* Initialize all the necessary variables, start the event loop, |
085dd6e6 | 176 | register readline, and stdin, start the loop. */ |
b5a0ac70 | 177 | void |
c2c6d25f | 178 | cli_command_loop (void) |
b5a0ac70 | 179 | { |
0f71a2f6 JM |
180 | int length; |
181 | char *a_prompt; | |
9e0b60a8 | 182 | char *gdb_prompt = get_prompt (); |
b5a0ac70 | 183 | |
0f71a2f6 JM |
184 | /* If we are using readline, set things up and display the first |
185 | prompt, otherwise just print the prompt. */ | |
186 | if (async_command_editing_p) | |
187 | { | |
188 | /* Tell readline what the prompt to display is and what function it | |
c5aa993b JM |
189 | will need to call after a whole line is read. This also displays |
190 | the first prompt. */ | |
9e0b60a8 | 191 | length = strlen (PREFIX (0)) + strlen (gdb_prompt) + strlen (SUFFIX (0)) + 1; |
0f71a2f6 JM |
192 | a_prompt = (char *) xmalloc (length); |
193 | strcpy (a_prompt, PREFIX (0)); | |
9e0b60a8 | 194 | strcat (a_prompt, gdb_prompt); |
0f71a2f6 JM |
195 | strcat (a_prompt, SUFFIX (0)); |
196 | rl_callback_handler_install (a_prompt, input_handler); | |
197 | } | |
198 | else | |
199 | display_gdb_prompt (0); | |
b5a0ac70 | 200 | |
085dd6e6 JM |
201 | /* Now it's time to start the event loop. */ |
202 | start_event_loop (); | |
b5a0ac70 SS |
203 | } |
204 | ||
205 | /* Change the function to be invoked every time there is a character | |
206 | ready on stdin. This is used when the user sets the editing off, | |
207 | therefore bypassing readline, and letting gdb handle the input | |
208 | itself, via gdb_readline2. Also it is used in the opposite case in | |
209 | which the user sets editing on again, by restoring readline | |
210 | handling of the input. */ | |
392a587b | 211 | static void |
c2c6d25f | 212 | change_line_handler (void) |
b5a0ac70 | 213 | { |
c2c6d25f JM |
214 | /* NOTE: this operates on input_fd, not instream. If we are reading |
215 | commands from a file, instream will point to the file. However in | |
216 | async mode, we always read commands from a file with editing | |
217 | off. This means that the 'set editing on/off' will have effect | |
218 | only on the interactive session. */ | |
219 | ||
b5a0ac70 SS |
220 | if (async_command_editing_p) |
221 | { | |
222 | /* Turn on editing by using readline. */ | |
c2c6d25f | 223 | call_readline = rl_callback_read_char_wrapper; |
0f71a2f6 | 224 | input_handler = command_line_handler; |
b5a0ac70 SS |
225 | } |
226 | else | |
227 | { | |
228 | /* Turn off editing by using gdb_readline2. */ | |
229 | rl_callback_handler_remove (); | |
230 | call_readline = gdb_readline2; | |
0f71a2f6 JM |
231 | |
232 | /* Set up the command handler as well, in case we are called as | |
c5aa993b | 233 | first thing from .gdbinit. */ |
0f71a2f6 | 234 | input_handler = command_line_handler; |
b5a0ac70 | 235 | } |
b5a0ac70 SS |
236 | } |
237 | ||
238 | /* Displays the prompt. The prompt that is displayed is the current | |
239 | top of the prompt stack, if the argument NEW_PROMPT is | |
240 | 0. Otherwise, it displays whatever NEW_PROMPT is. This is used | |
241 | after each gdb command has completed, and in the following cases: | |
0f71a2f6 JM |
242 | 1. when the user enters a command line which is ended by '\' |
243 | indicating that the command will continue on the next line. | |
b5a0ac70 | 244 | In that case the prompt that is displayed is the empty string. |
0f71a2f6 JM |
245 | 2. When the user is entering 'commands' for a breakpoint, or |
246 | actions for a tracepoint. In this case the prompt will be '>' | |
247 | 3. Other???? | |
b5a0ac70 SS |
248 | FIXME: 2. & 3. not implemented yet for async. */ |
249 | void | |
c2c6d25f | 250 | display_gdb_prompt (char *new_prompt) |
b5a0ac70 SS |
251 | { |
252 | int prompt_length = 0; | |
c5aa993b | 253 | char *gdb_prompt = get_prompt (); |
b5a0ac70 | 254 | |
4389a95a AC |
255 | /* Each interpreter has its own rules on displaying the command |
256 | prompt. */ | |
257 | if (!current_interp_display_prompt_p ()) | |
fb40c209 | 258 | return; |
fb40c209 | 259 | |
6426a772 | 260 | if (target_executing && sync_execution) |
adf40b2e JM |
261 | { |
262 | /* This is to trick readline into not trying to display the | |
6426a772 JM |
263 | prompt. Even though we display the prompt using this |
264 | function, readline still tries to do its own display if we | |
265 | don't call rl_callback_handler_install and | |
266 | rl_callback_handler_remove (which readline detects because a | |
267 | global variable is not set). If readline did that, it could | |
268 | mess up gdb signal handlers for SIGINT. Readline assumes | |
269 | that between calls to rl_set_signals and rl_clear_signals gdb | |
270 | doesn't do anything with the signal handlers. Well, that's | |
271 | not the case, because when the target executes we change the | |
272 | SIGINT signal handler. If we allowed readline to display the | |
273 | prompt, the signal handler change would happen exactly | |
274 | between the calls to the above two functions. | |
275 | Calling rl_callback_handler_remove(), does the job. */ | |
adf40b2e JM |
276 | |
277 | rl_callback_handler_remove (); | |
278 | return; | |
279 | } | |
280 | ||
b5a0ac70 SS |
281 | if (!new_prompt) |
282 | { | |
283 | /* Just use the top of the prompt stack. */ | |
284 | prompt_length = strlen (PREFIX (0)) + | |
285 | strlen (SUFFIX (0)) + | |
9e0b60a8 | 286 | strlen (gdb_prompt) + 1; |
b5a0ac70 SS |
287 | |
288 | new_prompt = (char *) alloca (prompt_length); | |
289 | ||
290 | /* Prefix needs to have new line at end. */ | |
291 | strcpy (new_prompt, PREFIX (0)); | |
9e0b60a8 | 292 | strcat (new_prompt, gdb_prompt); |
b5a0ac70 SS |
293 | /* Suffix needs to have a new line at end and \032 \032 at |
294 | beginning. */ | |
295 | strcat (new_prompt, SUFFIX (0)); | |
296 | } | |
297 | ||
298 | if (async_command_editing_p) | |
299 | { | |
300 | rl_callback_handler_remove (); | |
301 | rl_callback_handler_install (new_prompt, input_handler); | |
302 | } | |
adf40b2e | 303 | /* new_prompt at this point can be the top of the stack or the one passed in */ |
b5a0ac70 SS |
304 | else if (new_prompt) |
305 | { | |
306 | /* Don't use a _filtered function here. It causes the assumed | |
307 | character position to be off, since the newline we read from | |
308 | the user is not accounted for. */ | |
309 | fputs_unfiltered (new_prompt, gdb_stdout); | |
b5a0ac70 SS |
310 | gdb_flush (gdb_stdout); |
311 | } | |
312 | } | |
313 | ||
314 | /* Used when the user requests a different annotation level, with | |
315 | 'set annotate'. It pushes a new prompt (with prefix and suffix) on top | |
316 | of the prompt stack, if the annotation level desired is 2, otherwise | |
317 | it pops the top of the prompt stack when we want the annotation level | |
adf40b2e | 318 | to be the normal ones (1 or 0). */ |
392a587b | 319 | static void |
c2c6d25f | 320 | change_annotation_level (void) |
b5a0ac70 SS |
321 | { |
322 | char *prefix, *suffix; | |
323 | ||
324 | if (!PREFIX (0) || !PROMPT (0) || !SUFFIX (0)) | |
325 | { | |
326 | /* The prompt stack has not been initialized to "", we are | |
327 | using gdb w/o the --async switch */ | |
8a3fe4f8 | 328 | warning (_("Command has same effect as set annotate")); |
b5a0ac70 SS |
329 | return; |
330 | } | |
331 | ||
332 | if (annotation_level > 1) | |
333 | { | |
334 | if (!strcmp (PREFIX (0), "") && !strcmp (SUFFIX (0), "")) | |
335 | { | |
336 | /* Push a new prompt if the previous annotation_level was not >1. */ | |
337 | prefix = (char *) alloca (strlen (async_annotation_suffix) + 10); | |
338 | strcpy (prefix, "\n\032\032pre-"); | |
339 | strcat (prefix, async_annotation_suffix); | |
340 | strcat (prefix, "\n"); | |
341 | ||
342 | suffix = (char *) alloca (strlen (async_annotation_suffix) + 6); | |
343 | strcpy (suffix, "\n\032\032"); | |
344 | strcat (suffix, async_annotation_suffix); | |
345 | strcat (suffix, "\n"); | |
346 | ||
347 | push_prompt (prefix, (char *) 0, suffix); | |
348 | } | |
349 | } | |
350 | else | |
351 | { | |
352 | if (strcmp (PREFIX (0), "") && strcmp (SUFFIX (0), "")) | |
353 | { | |
354 | /* Pop the top of the stack, we are going back to annotation < 1. */ | |
355 | pop_prompt (); | |
356 | } | |
357 | } | |
358 | } | |
359 | ||
360 | /* Pushes a new prompt on the prompt stack. Each prompt has three | |
361 | parts: prefix, prompt, suffix. Usually prefix and suffix are empty | |
362 | strings, except when the annotation level is 2. Memory is allocated | |
363 | within savestring for the new prompt. */ | |
43ff13b4 | 364 | void |
c2c6d25f | 365 | push_prompt (char *prefix, char *prompt, char *suffix) |
b5a0ac70 SS |
366 | { |
367 | the_prompts.top++; | |
368 | PREFIX (0) = savestring (prefix, strlen (prefix)); | |
369 | ||
43ff13b4 JM |
370 | /* Note that this function is used by the set annotate 2 |
371 | command. This is why we take care of saving the old prompt | |
372 | in case a new one is not specified. */ | |
b5a0ac70 SS |
373 | if (prompt) |
374 | PROMPT (0) = savestring (prompt, strlen (prompt)); | |
375 | else | |
376 | PROMPT (0) = savestring (PROMPT (-1), strlen (PROMPT (-1))); | |
377 | ||
378 | SUFFIX (0) = savestring (suffix, strlen (suffix)); | |
379 | } | |
380 | ||
381 | /* Pops the top of the prompt stack, and frees the memory allocated for it. */ | |
43ff13b4 | 382 | void |
c2c6d25f | 383 | pop_prompt (void) |
b5a0ac70 | 384 | { |
43ff13b4 JM |
385 | /* If we are not during a 'synchronous' execution command, in which |
386 | case, the top prompt would be empty. */ | |
387 | if (strcmp (PROMPT (0), "")) | |
388 | /* This is for the case in which the prompt is set while the | |
389 | annotation level is 2. The top prompt will be changed, but when | |
390 | we return to annotation level < 2, we want that new prompt to be | |
391 | in effect, until the user does another 'set prompt'. */ | |
392 | if (strcmp (PROMPT (0), PROMPT (-1))) | |
393 | { | |
b8c9b27d | 394 | xfree (PROMPT (-1)); |
43ff13b4 JM |
395 | PROMPT (-1) = savestring (PROMPT (0), strlen (PROMPT (0))); |
396 | } | |
b5a0ac70 | 397 | |
b8c9b27d KB |
398 | xfree (PREFIX (0)); |
399 | xfree (PROMPT (0)); | |
400 | xfree (SUFFIX (0)); | |
b5a0ac70 SS |
401 | the_prompts.top--; |
402 | } | |
c2c6d25f JM |
403 | |
404 | /* When there is an event ready on the stdin file desriptor, instead | |
405 | of calling readline directly throught the callback function, or | |
406 | instead of calling gdb_readline2, give gdb a chance to detect | |
407 | errors and do something. */ | |
408 | void | |
2acceee2 | 409 | stdin_event_handler (int error, gdb_client_data client_data) |
c2c6d25f JM |
410 | { |
411 | if (error) | |
412 | { | |
a3f17187 | 413 | printf_unfiltered (_("error detected on stdin\n")); |
2acceee2 | 414 | delete_file_handler (input_fd); |
c2c6d25f JM |
415 | discard_all_continuations (); |
416 | /* If stdin died, we may as well kill gdb. */ | |
c5394b80 | 417 | quit_command ((char *) 0, stdin == instream); |
c2c6d25f JM |
418 | } |
419 | else | |
6426a772 | 420 | (*call_readline) (client_data); |
c2c6d25f JM |
421 | } |
422 | ||
6426a772 JM |
423 | /* Re-enable stdin after the end of an execution command in |
424 | synchronous mode, or after an error from the target, and we aborted | |
425 | the exec operation. */ | |
426 | ||
427 | void | |
428 | async_enable_stdin (void *dummy) | |
429 | { | |
430 | /* See NOTE in async_disable_stdin() */ | |
431 | /* FIXME: cagney/1999-09-27: Call this before clearing | |
432 | sync_execution. Current target_terminal_ours() implementations | |
433 | check for sync_execution before switching the terminal. */ | |
434 | target_terminal_ours (); | |
435 | pop_prompt (); | |
436 | sync_execution = 0; | |
437 | } | |
438 | ||
439 | /* Disable reads from stdin (the console) marking the command as | |
440 | synchronous. */ | |
441 | ||
442 | void | |
443 | async_disable_stdin (void) | |
444 | { | |
445 | sync_execution = 1; | |
446 | push_prompt ("", "", ""); | |
447 | /* FIXME: cagney/1999-09-27: At present this call is technically | |
448 | redundant since infcmd.c and infrun.c both already call | |
449 | target_terminal_inferior(). As the terminal handling (in | |
450 | sync/async mode) is refined, the duplicate calls can be | |
451 | eliminated (Here or in infcmd.c/infrun.c). */ | |
452 | target_terminal_inferior (); | |
2acceee2 JM |
453 | /* Add the reinstate of stdin to the list of cleanups to be done |
454 | in case the target errors out and dies. These cleanups are also | |
455 | done in case of normal successful termination of the execution | |
456 | command, by complete_execution(). */ | |
6426a772 JM |
457 | make_exec_error_cleanup (async_enable_stdin, NULL); |
458 | } | |
b5a0ac70 | 459 | \f |
6426a772 | 460 | |
b5a0ac70 SS |
461 | /* Handles a gdb command. This function is called by |
462 | command_line_handler, which has processed one or more input lines | |
463 | into COMMAND. */ | |
392a587b | 464 | /* NOTE: 1999-04-30 This is the asynchronous version of the command_loop |
b5a0ac70 SS |
465 | function. The command_loop function will be obsolete when we |
466 | switch to use the event loop at every execution of gdb. */ | |
392a587b | 467 | static void |
c2c6d25f | 468 | command_handler (char *command) |
b5a0ac70 SS |
469 | { |
470 | struct cleanup *old_chain; | |
471 | int stdin_is_tty = ISATTY (stdin); | |
43ff13b4 JM |
472 | struct continuation_arg *arg1; |
473 | struct continuation_arg *arg2; | |
b5a0ac70 SS |
474 | long time_at_cmd_start; |
475 | #ifdef HAVE_SBRK | |
476 | long space_at_cmd_start = 0; | |
477 | #endif | |
478 | extern int display_time; | |
479 | extern int display_space; | |
480 | ||
b5a0ac70 SS |
481 | quit_flag = 0; |
482 | if (instream == stdin && stdin_is_tty) | |
483 | reinitialize_more_filter (); | |
e2273c6d | 484 | old_chain = make_cleanup (null_cleanup, 0); |
b5a0ac70 | 485 | |
b5a0ac70 SS |
486 | /* If readline returned a NULL command, it means that the |
487 | connection with the terminal is gone. This happens at the | |
488 | end of a testsuite run, after Expect has hung up | |
489 | but GDB is still alive. In such a case, we just quit gdb | |
490 | killing the inferior program too. */ | |
491 | if (command == 0) | |
492 | quit_command ((char *) 0, stdin == instream); | |
493 | ||
494 | time_at_cmd_start = get_run_time (); | |
495 | ||
496 | if (display_space) | |
497 | { | |
498 | #ifdef HAVE_SBRK | |
b5a0ac70 | 499 | char *lim = (char *) sbrk (0); |
6dd77b81 | 500 | space_at_cmd_start = lim - lim_at_start; |
b5a0ac70 SS |
501 | #endif |
502 | } | |
503 | ||
504 | execute_command (command, instream == stdin); | |
c5aa993b | 505 | |
43ff13b4 | 506 | /* Set things up for this function to be compete later, once the |
701f9765 | 507 | execution has completed, if we are doing an execution command, |
43ff13b4 | 508 | otherwise, just go ahead and finish. */ |
6426a772 | 509 | if (target_can_async_p () && target_executing) |
43ff13b4 | 510 | { |
c5aa993b | 511 | arg1 = |
43ff13b4 | 512 | (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg)); |
c5aa993b | 513 | arg2 = |
43ff13b4 JM |
514 | (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg)); |
515 | arg1->next = arg2; | |
516 | arg2->next = NULL; | |
87c4a039 EZ |
517 | arg1->data.longint = time_at_cmd_start; |
518 | #ifdef HAVE_SBRK | |
519 | arg2->data.longint = space_at_cmd_start; | |
520 | #endif | |
43ff13b4 JM |
521 | add_continuation (command_line_handler_continuation, arg1); |
522 | } | |
b5a0ac70 | 523 | |
43ff13b4 JM |
524 | /* Do any commands attached to breakpoint we stopped at. Only if we |
525 | are always running synchronously. Or if we have just executed a | |
526 | command that doesn't start the target. */ | |
6426a772 | 527 | if (!target_can_async_p () || !target_executing) |
43ff13b4 JM |
528 | { |
529 | bpstat_do_actions (&stop_bpstat); | |
530 | do_cleanups (old_chain); | |
c5aa993b | 531 | |
43ff13b4 JM |
532 | if (display_time) |
533 | { | |
534 | long cmd_time = get_run_time () - time_at_cmd_start; | |
535 | ||
a3f17187 | 536 | printf_unfiltered (_("Command execution time: %ld.%06ld\n"), |
43ff13b4 JM |
537 | cmd_time / 1000000, cmd_time % 1000000); |
538 | } | |
539 | ||
540 | if (display_space) | |
541 | { | |
542 | #ifdef HAVE_SBRK | |
43ff13b4 | 543 | char *lim = (char *) sbrk (0); |
6dd77b81 | 544 | long space_now = lim - lim_at_start; |
43ff13b4 JM |
545 | long space_diff = space_now - space_at_cmd_start; |
546 | ||
a3f17187 | 547 | printf_unfiltered (_("Space used: %ld (%c%ld for this command)\n"), |
43ff13b4 JM |
548 | space_now, |
549 | (space_diff >= 0 ? '+' : '-'), | |
550 | space_diff); | |
551 | #endif | |
552 | } | |
553 | } | |
554 | } | |
555 | ||
556 | /* Do any commands attached to breakpoint we stopped at. Only if we | |
557 | are always running synchronously. Or if we have just executed a | |
558 | command that doesn't start the target. */ | |
559 | void | |
c2c6d25f | 560 | command_line_handler_continuation (struct continuation_arg *arg) |
c5aa993b | 561 | { |
43ff13b4 JM |
562 | extern int display_time; |
563 | extern int display_space; | |
564 | ||
57e687d9 MS |
565 | long time_at_cmd_start = arg->data.longint; |
566 | long space_at_cmd_start = arg->next->data.longint; | |
b5a0ac70 | 567 | |
43ff13b4 | 568 | bpstat_do_actions (&stop_bpstat); |
c5aa993b JM |
569 | /*do_cleanups (old_chain); *//*?????FIXME????? */ |
570 | ||
b5a0ac70 SS |
571 | if (display_time) |
572 | { | |
573 | long cmd_time = get_run_time () - time_at_cmd_start; | |
574 | ||
a3f17187 | 575 | printf_unfiltered (_("Command execution time: %ld.%06ld\n"), |
b5a0ac70 SS |
576 | cmd_time / 1000000, cmd_time % 1000000); |
577 | } | |
b5a0ac70 SS |
578 | if (display_space) |
579 | { | |
580 | #ifdef HAVE_SBRK | |
b5a0ac70 | 581 | char *lim = (char *) sbrk (0); |
6dd77b81 | 582 | long space_now = lim - lim_at_start; |
b5a0ac70 SS |
583 | long space_diff = space_now - space_at_cmd_start; |
584 | ||
a3f17187 | 585 | printf_unfiltered (_("Space used: %ld (%c%ld for this command)\n"), |
b5a0ac70 SS |
586 | space_now, |
587 | (space_diff >= 0 ? '+' : '-'), | |
588 | space_diff); | |
589 | #endif | |
590 | } | |
591 | } | |
592 | ||
593 | /* Handle a complete line of input. This is called by the callback | |
594 | mechanism within the readline library. Deal with incomplete commands | |
595 | as well, by saving the partial input in a global buffer. */ | |
596 | ||
392a587b | 597 | /* NOTE: 1999-04-30 This is the asynchronous version of the |
b5a0ac70 SS |
598 | command_line_input function. command_line_input will become |
599 | obsolete once we use the event loop as the default mechanism in | |
600 | GDB. */ | |
601 | static void | |
c2c6d25f | 602 | command_line_handler (char *rl) |
b5a0ac70 SS |
603 | { |
604 | static char *linebuffer = 0; | |
605 | static unsigned linelength = 0; | |
52f0bd74 | 606 | char *p; |
b5a0ac70 | 607 | char *p1; |
b5a0ac70 SS |
608 | extern char *line; |
609 | extern int linesize; | |
610 | char *nline; | |
611 | char got_eof = 0; | |
612 | ||
613 | ||
614 | int repeat = (instream == stdin); | |
615 | ||
616 | if (annotation_level > 1 && instream == stdin) | |
617 | { | |
a3f17187 | 618 | printf_unfiltered (("\n\032\032post-")); |
306d9ac5 | 619 | puts_unfiltered (async_annotation_suffix); |
a3f17187 | 620 | printf_unfiltered (("\n")); |
b5a0ac70 SS |
621 | } |
622 | ||
623 | if (linebuffer == 0) | |
624 | { | |
625 | linelength = 80; | |
626 | linebuffer = (char *) xmalloc (linelength); | |
627 | } | |
628 | ||
629 | p = linebuffer; | |
630 | ||
631 | if (more_to_come) | |
632 | { | |
633 | strcpy (linebuffer, readline_input_state.linebuffer); | |
634 | p = readline_input_state.linebuffer_ptr; | |
b8c9b27d | 635 | xfree (readline_input_state.linebuffer); |
b5a0ac70 | 636 | more_to_come = 0; |
adf40b2e | 637 | pop_prompt (); |
b5a0ac70 SS |
638 | } |
639 | ||
640 | #ifdef STOP_SIGNAL | |
641 | if (job_control) | |
0f71a2f6 | 642 | signal (STOP_SIGNAL, handle_stop_sig); |
b5a0ac70 SS |
643 | #endif |
644 | ||
645 | /* Make sure that all output has been output. Some machines may let | |
646 | you get away with leaving out some of the gdb_flush, but not all. */ | |
647 | wrap_here (""); | |
648 | gdb_flush (gdb_stdout); | |
649 | gdb_flush (gdb_stderr); | |
650 | ||
651 | if (source_file_name != NULL) | |
637537d0 | 652 | ++source_line_number; |
b5a0ac70 SS |
653 | |
654 | /* If we are in this case, then command_handler will call quit | |
655 | and exit from gdb. */ | |
656 | if (!rl || rl == (char *) EOF) | |
657 | { | |
658 | got_eof = 1; | |
659 | command_handler (0); | |
660 | } | |
661 | if (strlen (rl) + 1 + (p - linebuffer) > linelength) | |
662 | { | |
663 | linelength = strlen (rl) + 1 + (p - linebuffer); | |
664 | nline = (char *) xrealloc (linebuffer, linelength); | |
665 | p += nline - linebuffer; | |
666 | linebuffer = nline; | |
667 | } | |
668 | p1 = rl; | |
669 | /* Copy line. Don't copy null at end. (Leaves line alone | |
670 | if this was just a newline) */ | |
671 | while (*p1) | |
672 | *p++ = *p1++; | |
673 | ||
b8c9b27d | 674 | xfree (rl); /* Allocated in readline. */ |
b5a0ac70 | 675 | |
4dd79c29 | 676 | if (p > linebuffer && *(p - 1) == '\\') |
b5a0ac70 | 677 | { |
b5a0ac70 SS |
678 | p--; /* Put on top of '\'. */ |
679 | ||
d96429cd AS |
680 | readline_input_state.linebuffer = savestring (linebuffer, |
681 | strlen (linebuffer)); | |
682 | readline_input_state.linebuffer_ptr = p; | |
683 | ||
684 | /* We will not invoke a execute_command if there is more | |
685 | input expected to complete the command. So, we need to | |
686 | print an empty prompt here. */ | |
687 | more_to_come = 1; | |
688 | push_prompt ("", "", ""); | |
689 | display_gdb_prompt (0); | |
690 | return; | |
b5a0ac70 SS |
691 | } |
692 | ||
693 | #ifdef STOP_SIGNAL | |
694 | if (job_control) | |
695 | signal (STOP_SIGNAL, SIG_DFL); | |
696 | #endif | |
697 | ||
698 | #define SERVER_COMMAND_LENGTH 7 | |
699 | server_command = | |
700 | (p - linebuffer > SERVER_COMMAND_LENGTH) | |
bf896cb0 | 701 | && strncmp (linebuffer, "server ", SERVER_COMMAND_LENGTH) == 0; |
b5a0ac70 SS |
702 | if (server_command) |
703 | { | |
704 | /* Note that we don't set `line'. Between this and the check in | |
705 | dont_repeat, this insures that repeating will still do the | |
706 | right thing. */ | |
707 | *p = '\0'; | |
708 | command_handler (linebuffer + SERVER_COMMAND_LENGTH); | |
709 | display_gdb_prompt (0); | |
710 | return; | |
711 | } | |
712 | ||
713 | /* Do history expansion if that is wished. */ | |
714 | if (history_expansion_p && instream == stdin | |
715 | && ISATTY (instream)) | |
716 | { | |
717 | char *history_value; | |
718 | int expanded; | |
719 | ||
720 | *p = '\0'; /* Insert null now. */ | |
721 | expanded = history_expand (linebuffer, &history_value); | |
722 | if (expanded) | |
723 | { | |
724 | /* Print the changes. */ | |
725 | printf_unfiltered ("%s\n", history_value); | |
726 | ||
727 | /* If there was an error, call this function again. */ | |
728 | if (expanded < 0) | |
729 | { | |
b8c9b27d | 730 | xfree (history_value); |
b5a0ac70 SS |
731 | return; |
732 | } | |
733 | if (strlen (history_value) > linelength) | |
734 | { | |
735 | linelength = strlen (history_value) + 1; | |
736 | linebuffer = (char *) xrealloc (linebuffer, linelength); | |
737 | } | |
738 | strcpy (linebuffer, history_value); | |
739 | p = linebuffer + strlen (linebuffer); | |
b8c9b27d | 740 | xfree (history_value); |
b5a0ac70 SS |
741 | } |
742 | } | |
743 | ||
744 | /* If we just got an empty line, and that is supposed | |
745 | to repeat the previous command, return the value in the | |
746 | global buffer. */ | |
747 | if (repeat && p == linebuffer && *p != '\\') | |
748 | { | |
749 | command_handler (line); | |
750 | display_gdb_prompt (0); | |
751 | return; | |
752 | } | |
753 | ||
754 | for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++); | |
755 | if (repeat && !*p1) | |
756 | { | |
757 | command_handler (line); | |
758 | display_gdb_prompt (0); | |
759 | return; | |
760 | } | |
761 | ||
762 | *p = 0; | |
763 | ||
764 | /* Add line to history if appropriate. */ | |
765 | if (instream == stdin | |
766 | && ISATTY (stdin) && *linebuffer) | |
767 | add_history (linebuffer); | |
768 | ||
769 | /* Note: lines consisting solely of comments are added to the command | |
770 | history. This is useful when you type a command, and then | |
771 | realize you don't want to execute it quite yet. You can comment | |
772 | out the command and then later fetch it from the value history | |
773 | and remove the '#'. The kill ring is probably better, but some | |
774 | people are in the habit of commenting things out. */ | |
775 | if (*p1 == '#') | |
776 | *p1 = '\0'; /* Found a comment. */ | |
777 | ||
778 | /* Save into global buffer if appropriate. */ | |
779 | if (repeat) | |
780 | { | |
781 | if (linelength > linesize) | |
782 | { | |
783 | line = xrealloc (line, linelength); | |
784 | linesize = linelength; | |
785 | } | |
786 | strcpy (line, linebuffer); | |
787 | if (!more_to_come) | |
788 | { | |
789 | command_handler (line); | |
790 | display_gdb_prompt (0); | |
791 | } | |
792 | return; | |
793 | } | |
794 | ||
795 | command_handler (linebuffer); | |
796 | display_gdb_prompt (0); | |
797 | return; | |
798 | } | |
799 | ||
800 | /* Does reading of input from terminal w/o the editing features | |
801 | provided by the readline library. */ | |
802 | ||
392a587b | 803 | /* NOTE: 1999-04-30 Asynchronous version of gdb_readline. gdb_readline |
b5a0ac70 SS |
804 | will become obsolete when the event loop is made the default |
805 | execution for gdb. */ | |
085dd6e6 | 806 | void |
c2c6d25f | 807 | gdb_readline2 (gdb_client_data client_data) |
b5a0ac70 SS |
808 | { |
809 | int c; | |
810 | char *result; | |
811 | int input_index = 0; | |
812 | int result_size = 80; | |
7be570e7 JM |
813 | static int done_once = 0; |
814 | ||
815 | /* Unbuffer the input stream, so that, later on, the calls to fgetc | |
816 | fetch only one char at the time from the stream. The fgetc's will | |
817 | get up to the first newline, but there may be more chars in the | |
818 | stream after '\n'. If we buffer the input and fgetc drains the | |
819 | stream, getting stuff beyond the newline as well, a select, done | |
820 | afterwards will not trigger. */ | |
821 | if (!done_once && !ISATTY (instream)) | |
822 | { | |
823 | setbuf (instream, NULL); | |
824 | done_once = 1; | |
825 | } | |
b5a0ac70 SS |
826 | |
827 | result = (char *) xmalloc (result_size); | |
828 | ||
829 | /* We still need the while loop here, even though it would seem | |
830 | obvious to invoke gdb_readline2 at every character entered. If | |
831 | not using the readline library, the terminal is in cooked mode, | |
832 | which sends the characters all at once. Poll will notice that the | |
833 | input fd has changed state only after enter is pressed. At this | |
834 | point we still need to fetch all the chars entered. */ | |
835 | ||
836 | while (1) | |
837 | { | |
838 | /* Read from stdin if we are executing a user defined command. | |
839 | This is the right thing for prompt_for_continue, at least. */ | |
840 | c = fgetc (instream ? instream : stdin); | |
841 | ||
842 | if (c == EOF) | |
843 | { | |
844 | if (input_index > 0) | |
845 | /* The last line does not end with a newline. Return it, and | |
846 | if we are called again fgetc will still return EOF and | |
847 | we'll return NULL then. */ | |
848 | break; | |
b8c9b27d | 849 | xfree (result); |
0f71a2f6 | 850 | (*input_handler) (0); |
b5a0ac70 SS |
851 | } |
852 | ||
853 | if (c == '\n') | |
b5a0ac70 SS |
854 | { |
855 | if (input_index > 0 && result[input_index - 1] == '\r') | |
856 | input_index--; | |
857 | break; | |
858 | } | |
b5a0ac70 SS |
859 | |
860 | result[input_index++] = c; | |
861 | while (input_index >= result_size) | |
862 | { | |
863 | result_size *= 2; | |
864 | result = (char *) xrealloc (result, result_size); | |
865 | } | |
866 | } | |
867 | ||
868 | result[input_index++] = '\0'; | |
0f71a2f6 | 869 | (*input_handler) (result); |
b5a0ac70 SS |
870 | } |
871 | \f | |
872 | ||
873 | /* Initialization of signal handlers and tokens. There is a function | |
874 | handle_sig* for each of the signals GDB cares about. Specifically: | |
875 | SIGINT, SIGFPE, SIGQUIT, SIGTSTP, SIGHUP, SIGWINCH. These | |
876 | functions are the actual signal handlers associated to the signals | |
877 | via calls to signal(). The only job for these functions is to | |
878 | enqueue the appropriate event/procedure with the event loop. Such | |
879 | procedures are the old signal handlers. The event loop will take | |
880 | care of invoking the queued procedures to perform the usual tasks | |
881 | associated with the reception of the signal. */ | |
392a587b | 882 | /* NOTE: 1999-04-30 This is the asynchronous version of init_signals. |
b5a0ac70 SS |
883 | init_signals will become obsolete as we move to have to event loop |
884 | as the default for gdb. */ | |
885 | void | |
c2c6d25f | 886 | async_init_signals (void) |
c5aa993b | 887 | { |
b5a0ac70 SS |
888 | signal (SIGINT, handle_sigint); |
889 | sigint_token = | |
0f71a2f6 | 890 | create_async_signal_handler (async_request_quit, NULL); |
b5a0ac70 SS |
891 | |
892 | /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed | |
893 | to the inferior and breakpoints will be ignored. */ | |
894 | #ifdef SIGTRAP | |
895 | signal (SIGTRAP, SIG_DFL); | |
896 | #endif | |
897 | ||
898 | /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get | |
899 | passed to the inferior, which we don't want. It would be | |
900 | possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but | |
901 | on BSD4.3 systems using vfork, that can affect the | |
902 | GDB process as well as the inferior (the signal handling tables | |
903 | might be in memory, shared between the two). Since we establish | |
904 | a handler for SIGQUIT, when we call exec it will set the signal | |
905 | to SIG_DFL for us. */ | |
906 | signal (SIGQUIT, handle_sigquit); | |
907 | sigquit_token = | |
0f71a2f6 | 908 | create_async_signal_handler (async_do_nothing, NULL); |
b5a0ac70 SS |
909 | #ifdef SIGHUP |
910 | if (signal (SIGHUP, handle_sighup) != SIG_IGN) | |
911 | sighup_token = | |
0f71a2f6 | 912 | create_async_signal_handler (async_disconnect, NULL); |
b5a0ac70 SS |
913 | else |
914 | sighup_token = | |
0f71a2f6 | 915 | create_async_signal_handler (async_do_nothing, NULL); |
b5a0ac70 SS |
916 | #endif |
917 | signal (SIGFPE, handle_sigfpe); | |
918 | sigfpe_token = | |
0f71a2f6 | 919 | create_async_signal_handler (async_float_handler, NULL); |
b5a0ac70 SS |
920 | |
921 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) | |
922 | signal (SIGWINCH, handle_sigwinch); | |
923 | sigwinch_token = | |
0f71a2f6 | 924 | create_async_signal_handler (SIGWINCH_HANDLER, NULL); |
b5a0ac70 | 925 | #endif |
0f71a2f6 JM |
926 | #ifdef STOP_SIGNAL |
927 | sigtstp_token = | |
928 | create_async_signal_handler (async_stop_sig, NULL); | |
929 | #endif | |
930 | ||
931 | } | |
932 | ||
c5aa993b | 933 | void |
97bb9d91 | 934 | mark_async_signal_handler_wrapper (void *token) |
0f71a2f6 | 935 | { |
c2c6d25f | 936 | mark_async_signal_handler ((struct async_signal_handler *) token); |
b5a0ac70 SS |
937 | } |
938 | ||
939 | /* Tell the event loop what to do if SIGINT is received. | |
940 | See event-signal.c. */ | |
c5aa993b | 941 | void |
c2c6d25f | 942 | handle_sigint (int sig) |
b5a0ac70 SS |
943 | { |
944 | signal (sig, handle_sigint); | |
945 | ||
946 | /* If immediate_quit is set, we go ahead and process the SIGINT right | |
947 | away, even if we usually would defer this to the event loop. The | |
948 | assumption here is that it is safe to process ^C immediately if | |
949 | immediate_quit is set. If we didn't, SIGINT would be really | |
950 | processed only the next time through the event loop. To get to | |
951 | that point, though, the command that we want to interrupt needs to | |
952 | finish first, which is unacceptable. */ | |
953 | if (immediate_quit) | |
0f71a2f6 | 954 | async_request_quit (0); |
b5a0ac70 SS |
955 | else |
956 | /* If immediate quit is not set, we process SIGINT the next time | |
957 | through the loop, which is fine. */ | |
0f71a2f6 | 958 | mark_async_signal_handler_wrapper (sigint_token); |
b5a0ac70 SS |
959 | } |
960 | ||
961 | /* Do the quit. All the checks have been done by the caller. */ | |
c5aa993b | 962 | void |
c2c6d25f | 963 | async_request_quit (gdb_client_data arg) |
b5a0ac70 SS |
964 | { |
965 | quit_flag = 1; | |
b5a0ac70 | 966 | quit (); |
b5a0ac70 SS |
967 | } |
968 | ||
969 | /* Tell the event loop what to do if SIGQUIT is received. | |
970 | See event-signal.c. */ | |
c5aa993b | 971 | static void |
c2c6d25f | 972 | handle_sigquit (int sig) |
b5a0ac70 | 973 | { |
0f71a2f6 | 974 | mark_async_signal_handler_wrapper (sigquit_token); |
b5a0ac70 SS |
975 | signal (sig, handle_sigquit); |
976 | } | |
977 | ||
978 | /* Called by the event loop in response to a SIGQUIT. */ | |
c5aa993b | 979 | static void |
c2c6d25f | 980 | async_do_nothing (gdb_client_data arg) |
b5a0ac70 SS |
981 | { |
982 | /* Empty function body. */ | |
983 | } | |
984 | ||
985 | #ifdef SIGHUP | |
986 | /* Tell the event loop what to do if SIGHUP is received. | |
987 | See event-signal.c. */ | |
c5aa993b | 988 | static void |
fba45db2 | 989 | handle_sighup (int sig) |
b5a0ac70 | 990 | { |
0f71a2f6 | 991 | mark_async_signal_handler_wrapper (sighup_token); |
b5a0ac70 SS |
992 | signal (sig, handle_sighup); |
993 | } | |
994 | ||
0f71a2f6 | 995 | /* Called by the event loop to process a SIGHUP */ |
c5aa993b | 996 | static void |
c2c6d25f | 997 | async_disconnect (gdb_client_data arg) |
b5a0ac70 SS |
998 | { |
999 | catch_errors (quit_cover, NULL, | |
1000 | "Could not kill the program being debugged", | |
1001 | RETURN_MASK_ALL); | |
1002 | signal (SIGHUP, SIG_DFL); /*FIXME: ??????????? */ | |
1003 | kill (getpid (), SIGHUP); | |
1004 | } | |
1005 | #endif | |
1006 | ||
0f71a2f6 | 1007 | #ifdef STOP_SIGNAL |
c5aa993b | 1008 | void |
c2c6d25f | 1009 | handle_stop_sig (int sig) |
0f71a2f6 | 1010 | { |
c5aa993b JM |
1011 | mark_async_signal_handler_wrapper (sigtstp_token); |
1012 | signal (sig, handle_stop_sig); | |
0f71a2f6 JM |
1013 | } |
1014 | ||
1015 | static void | |
c2c6d25f | 1016 | async_stop_sig (gdb_client_data arg) |
0f71a2f6 | 1017 | { |
c5aa993b | 1018 | char *prompt = get_prompt (); |
0f71a2f6 JM |
1019 | #if STOP_SIGNAL == SIGTSTP |
1020 | signal (SIGTSTP, SIG_DFL); | |
2acceee2 JM |
1021 | #if HAVE_SIGPROCMASK |
1022 | { | |
1023 | sigset_t zero; | |
46711df8 | 1024 | |
2acceee2 JM |
1025 | sigemptyset (&zero); |
1026 | sigprocmask (SIG_SETMASK, &zero, 0); | |
1027 | } | |
46711df8 | 1028 | #elif HAVE_SIGSETMASK |
0f71a2f6 | 1029 | sigsetmask (0); |
2acceee2 | 1030 | #endif |
0f71a2f6 JM |
1031 | kill (getpid (), SIGTSTP); |
1032 | signal (SIGTSTP, handle_stop_sig); | |
1033 | #else | |
1034 | signal (STOP_SIGNAL, handle_stop_sig); | |
1035 | #endif | |
1036 | printf_unfiltered ("%s", prompt); | |
1037 | gdb_flush (gdb_stdout); | |
1038 | ||
1039 | /* Forget about any previous command -- null line now will do nothing. */ | |
1040 | dont_repeat (); | |
1041 | } | |
1042 | #endif /* STOP_SIGNAL */ | |
1043 | ||
b5a0ac70 SS |
1044 | /* Tell the event loop what to do if SIGFPE is received. |
1045 | See event-signal.c. */ | |
c5aa993b | 1046 | static void |
c2c6d25f | 1047 | handle_sigfpe (int sig) |
b5a0ac70 | 1048 | { |
0f71a2f6 | 1049 | mark_async_signal_handler_wrapper (sigfpe_token); |
b5a0ac70 SS |
1050 | signal (sig, handle_sigfpe); |
1051 | } | |
1052 | ||
1053 | /* Event loop will call this functin to process a SIGFPE. */ | |
c5aa993b | 1054 | static void |
c2c6d25f | 1055 | async_float_handler (gdb_client_data arg) |
b5a0ac70 SS |
1056 | { |
1057 | /* This message is based on ANSI C, section 4.7. Note that integer | |
1058 | divide by zero causes this, so "float" is a misnomer. */ | |
8a3fe4f8 | 1059 | error (_("Erroneous arithmetic operation.")); |
b5a0ac70 SS |
1060 | } |
1061 | ||
1062 | /* Tell the event loop what to do if SIGWINCH is received. | |
1063 | See event-signal.c. */ | |
1064 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) | |
c5aa993b | 1065 | static void |
c2c6d25f | 1066 | handle_sigwinch (int sig) |
b5a0ac70 | 1067 | { |
0f71a2f6 | 1068 | mark_async_signal_handler_wrapper (sigwinch_token); |
b5a0ac70 SS |
1069 | signal (sig, handle_sigwinch); |
1070 | } | |
1071 | #endif | |
1072 | \f | |
1073 | ||
1074 | /* Called by do_setshow_command. */ | |
b5a0ac70 | 1075 | void |
c2c6d25f | 1076 | set_async_editing_command (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 SS |
1077 | { |
1078 | change_line_handler (); | |
1079 | } | |
1080 | ||
1081 | /* Called by do_setshow_command. */ | |
b5a0ac70 | 1082 | void |
c2c6d25f | 1083 | set_async_annotation_level (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 SS |
1084 | { |
1085 | change_annotation_level (); | |
1086 | } | |
1087 | ||
1088 | /* Called by do_setshow_command. */ | |
b5a0ac70 | 1089 | void |
c2c6d25f | 1090 | set_async_prompt (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 SS |
1091 | { |
1092 | PROMPT (0) = savestring (new_async_prompt, strlen (new_async_prompt)); | |
1093 | } | |
1094 | ||
0f71a2f6 JM |
1095 | /* Set things up for readline to be invoked via the alternate |
1096 | interface, i.e. via a callback function (rl_callback_read_char), | |
c5aa993b | 1097 | and hook up instream to the event loop. */ |
0f71a2f6 | 1098 | void |
cee6ddeb | 1099 | gdb_setup_readline (void) |
0f71a2f6 | 1100 | { |
362646f5 AC |
1101 | /* This function is a noop for the sync case. The assumption is |
1102 | that the sync setup is ALL done in gdb_init, and we would only | |
1103 | mess it up here. The sync stuff should really go away over | |
1104 | time. */ | |
1105 | ||
1106 | gdb_stdout = stdio_fileopen (stdout); | |
1107 | gdb_stderr = stdio_fileopen (stderr); | |
1108 | gdb_stdlog = gdb_stderr; /* for moment */ | |
1109 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
1110 | ||
1111 | /* If the input stream is connected to a terminal, turn on | |
1112 | editing. */ | |
1113 | if (ISATTY (instream)) | |
9e0b60a8 | 1114 | { |
362646f5 AC |
1115 | /* Tell gdb that we will be using the readline library. This |
1116 | could be overwritten by a command in .gdbinit like 'set | |
1117 | editing on' or 'off'. */ | |
1118 | async_command_editing_p = 1; | |
c5201926 | 1119 | |
362646f5 AC |
1120 | /* When a character is detected on instream by select or poll, |
1121 | readline will be invoked via this callback function. */ | |
1122 | call_readline = rl_callback_read_char_wrapper; | |
9e0b60a8 | 1123 | } |
362646f5 AC |
1124 | else |
1125 | { | |
1126 | async_command_editing_p = 0; | |
1127 | call_readline = gdb_readline2; | |
1128 | } | |
1129 | ||
1130 | /* When readline has read an end-of-line character, it passes the | |
1131 | complete line to gdb for processing. command_line_handler is the | |
1132 | function that does this. */ | |
1133 | input_handler = command_line_handler; | |
1134 | ||
1135 | /* Tell readline to use the same input stream that gdb uses. */ | |
1136 | rl_instream = instream; | |
1137 | ||
1138 | /* Get a file descriptor for the input stream, so that we can | |
1139 | register it with the event loop. */ | |
1140 | input_fd = fileno (instream); | |
1141 | ||
1142 | /* Now we need to create the event sources for the input file | |
1143 | descriptor. */ | |
1144 | /* At this point in time, this is the only event source that we | |
1145 | register with the even loop. Another source is going to be the | |
1146 | target program (inferior), but that must be registered only when | |
1147 | it actually exists (I.e. after we say 'run' or after we connect | |
1148 | to a remote target. */ | |
1149 | add_file_handler (input_fd, stdin_event_handler, 0); | |
0f71a2f6 | 1150 | } |
cee6ddeb | 1151 | |
7d5b6fdd EZ |
1152 | /* Disable command input through the standard CLI channels. Used in |
1153 | the suspend proc for interpreters that use the standard gdb readline | |
1154 | interface, like the cli & the mi. */ | |
1155 | void | |
1156 | gdb_disable_readline (void) | |
1157 | { | |
362646f5 AC |
1158 | /* FIXME - It is too heavyweight to delete and remake these every |
1159 | time you run an interpreter that needs readline. It is probably | |
1160 | better to have the interpreters cache these, which in turn means | |
1161 | that this needs to be moved into interpreter specific code. */ | |
7d5b6fdd EZ |
1162 | |
1163 | #if 0 | |
362646f5 AC |
1164 | ui_file_delete (gdb_stdout); |
1165 | ui_file_delete (gdb_stderr); | |
1166 | gdb_stdlog = NULL; | |
1167 | gdb_stdtarg = NULL; | |
7d5b6fdd EZ |
1168 | #endif |
1169 | ||
362646f5 AC |
1170 | rl_callback_handler_remove (); |
1171 | delete_file_handler (input_fd); | |
7d5b6fdd | 1172 | } |