Commit | Line | Data |
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b5a0ac70 | 1 | /* Top level stuff for GDB, the GNU debugger. |
637537d0 | 2 | |
7b6bb8da JB |
3 | Copyright (C) 1999, 2000, 2001, 2002, 2004, 2005, 2007, 2008, 2009, 2010, |
4 | 2011 Free Software Foundation, Inc. | |
637537d0 | 5 | |
b5a0ac70 SS |
6 | Written by Elena Zannoni <ezannoni@cygnus.com> of Cygnus Solutions. |
7 | ||
8 | This file is part of GDB. | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 12 | the Free Software Foundation; either version 3 of the License, or |
b5a0ac70 SS |
13 | (at your option) any later version. |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
371d5dec | 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
b5a0ac70 SS |
22 | |
23 | #include "defs.h" | |
0f71a2f6 | 24 | #include "top.h" |
b5a0ac70 | 25 | #include "inferior.h" |
e514a9d6 | 26 | #include "target.h" |
c5aa993b | 27 | #include "terminal.h" /* for job_control */ |
9e0b60a8 | 28 | #include "event-loop.h" |
c2c6d25f | 29 | #include "event-top.h" |
4389a95a | 30 | #include "interps.h" |
042be3a9 | 31 | #include <signal.h> |
60250e8b | 32 | #include "exceptions.h" |
16026cd7 | 33 | #include "cli/cli-script.h" /* for reset_command_nest_depth */ |
d01a8610 | 34 | #include "main.h" |
8ea051c5 | 35 | #include "gdbthread.h" |
be34f849 | 36 | #include "continuations.h" |
371d5dec | 37 | #include "gdbcmd.h" /* for dont_repeat() */ |
104c1213 | 38 | |
371d5dec | 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); | |
c2c6d25f JM |
48 | static void change_line_handler (void); |
49 | static void change_annotation_level (void); | |
50 | static void command_handler (char *command); | |
b5a0ac70 | 51 | |
371d5dec | 52 | /* Signal handlers. */ |
6d318c73 | 53 | #ifdef SIGQUIT |
c2c6d25f | 54 | static void handle_sigquit (int sig); |
6d318c73 | 55 | #endif |
0f0b8dcd | 56 | #ifdef SIGHUP |
c2c6d25f | 57 | static void handle_sighup (int sig); |
0f0b8dcd | 58 | #endif |
c2c6d25f | 59 | static void handle_sigfpe (int sig); |
d4f3574e | 60 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
c2c6d25f | 61 | static void handle_sigwinch (int sig); |
0f71a2f6 | 62 | #endif |
b5a0ac70 SS |
63 | |
64 | /* Functions to be invoked by the event loop in response to | |
371d5dec | 65 | signals. */ |
0f0b8dcd | 66 | #if defined (SIGQUIT) || defined (SIGHUP) |
c2c6d25f | 67 | static void async_do_nothing (gdb_client_data); |
0f0b8dcd DJ |
68 | #endif |
69 | #ifdef SIGHUP | |
c2c6d25f | 70 | static void async_disconnect (gdb_client_data); |
0f0b8dcd | 71 | #endif |
c2c6d25f | 72 | static void async_float_handler (gdb_client_data); |
0f0b8dcd | 73 | #ifdef STOP_SIGNAL |
c2c6d25f | 74 | static void async_stop_sig (gdb_client_data); |
0f0b8dcd | 75 | #endif |
b5a0ac70 | 76 | |
b5a0ac70 | 77 | /* Readline offers an alternate interface, via callback |
371d5dec | 78 | functions. These are all included in the file callback.c in the |
b5a0ac70 SS |
79 | readline distribution. This file provides (mainly) a function, which |
80 | the event loop uses as callback (i.e. event handler) whenever an event | |
81 | is detected on the standard input file descriptor. | |
82 | readline_callback_read_char is called (by the GDB event loop) whenever | |
371d5dec | 83 | there is a new character ready on the input stream. This function |
b5a0ac70 SS |
84 | incrementally builds a buffer internal to readline where it |
85 | accumulates the line read up to the point of invocation. In the | |
86 | special case in which the character read is newline, the function | |
87 | invokes a GDB supplied callback routine, which does the processing of | |
88 | a full command line. This latter routine is the asynchronous analog | |
371d5dec | 89 | of the old command_line_input in gdb. Instead of invoking (and waiting |
b5a0ac70 SS |
90 | for) readline to read the command line and pass it back to |
91 | command_loop for processing, the new command_line_handler function has | |
92 | the command line already available as its parameter. INPUT_HANDLER is | |
93 | to be set to the function that readline will invoke when a complete | |
94 | line of input is ready. CALL_READLINE is to be set to the function | |
371d5dec | 95 | that readline offers as callback to the event_loop. */ |
b5a0ac70 | 96 | |
c2c6d25f JM |
97 | void (*input_handler) (char *); |
98 | void (*call_readline) (gdb_client_data); | |
b5a0ac70 | 99 | |
371d5dec | 100 | /* Important variables for the event loop. */ |
b5a0ac70 SS |
101 | |
102 | /* This is used to determine if GDB is using the readline library or | |
371d5dec | 103 | its own simplified form of readline. It is used by the asynchronous |
0f71a2f6 | 104 | form of the set editing command. |
392a587b | 105 | ezannoni: as of 1999-04-29 I expect that this |
b5a0ac70 | 106 | variable will not be used after gdb is changed to use the event |
371d5dec | 107 | loop as default engine, and event-top.c is merged into top.c. */ |
b5a0ac70 SS |
108 | int async_command_editing_p; |
109 | ||
110 | /* This variable contains the new prompt that the user sets with the | |
371d5dec | 111 | set prompt command. */ |
b5a0ac70 SS |
112 | char *new_async_prompt; |
113 | ||
114 | /* This is the annotation suffix that will be used when the | |
371d5dec | 115 | annotation_level is 2. */ |
b5a0ac70 SS |
116 | char *async_annotation_suffix; |
117 | ||
104c1213 | 118 | /* This is used to display the notification of the completion of an |
371d5dec | 119 | asynchronous execution command. */ |
104c1213 JM |
120 | int exec_done_display_p = 0; |
121 | ||
b5a0ac70 | 122 | /* This is the file descriptor for the input stream that GDB uses to |
371d5dec | 123 | read commands from. */ |
b5a0ac70 SS |
124 | int input_fd; |
125 | ||
371d5dec | 126 | /* This is the prompt stack. Prompts will be pushed on the stack as |
b5a0ac70 | 127 | needed by the different 'kinds' of user inputs GDB is asking |
371d5dec | 128 | for. See event-loop.h. */ |
b5a0ac70 SS |
129 | struct prompts the_prompts; |
130 | ||
371d5dec | 131 | /* Signal handling variables. */ |
b5a0ac70 | 132 | /* Each of these is a pointer to a function that the event loop will |
371d5dec | 133 | invoke if the corresponding signal has received. The real signal |
b5a0ac70 | 134 | handlers mark these functions as ready to be executed and the event |
371d5dec MS |
135 | loop, in a later iteration, calls them. See the function |
136 | invoke_async_signal_handler. */ | |
97bb9d91 | 137 | void *sigint_token; |
b5a0ac70 | 138 | #ifdef SIGHUP |
97bb9d91 | 139 | void *sighup_token; |
b5a0ac70 | 140 | #endif |
6d318c73 | 141 | #ifdef SIGQUIT |
97bb9d91 | 142 | void *sigquit_token; |
6d318c73 | 143 | #endif |
97bb9d91 | 144 | void *sigfpe_token; |
b5a0ac70 | 145 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
97bb9d91 | 146 | void *sigwinch_token; |
b5a0ac70 | 147 | #endif |
0f71a2f6 | 148 | #ifdef STOP_SIGNAL |
97bb9d91 | 149 | void *sigtstp_token; |
0f71a2f6 JM |
150 | #endif |
151 | ||
b5a0ac70 | 152 | /* Structure to save a partially entered command. This is used when |
371d5dec | 153 | the user types '\' at the end of a command line. This is necessary |
b5a0ac70 SS |
154 | because each line of input is handled by a different call to |
155 | command_line_handler, and normally there is no state retained | |
371d5dec | 156 | between different calls. */ |
b5a0ac70 SS |
157 | int more_to_come = 0; |
158 | ||
159 | struct readline_input_state | |
160 | { | |
161 | char *linebuffer; | |
162 | char *linebuffer_ptr; | |
163 | } | |
164 | readline_input_state; | |
467d8519 TT |
165 | |
166 | /* This hook is called by rl_callback_read_char_wrapper after each | |
167 | character is processed. */ | |
b08ee6a2 | 168 | void (*after_char_processing_hook) (void); |
b5a0ac70 SS |
169 | \f |
170 | ||
371d5dec MS |
171 | /* Wrapper function for calling into the readline library. The event |
172 | loop expects the callback function to have a paramter, while | |
173 | readline expects none. */ | |
c2c6d25f JM |
174 | static void |
175 | rl_callback_read_char_wrapper (gdb_client_data client_data) | |
176 | { | |
177 | rl_callback_read_char (); | |
467d8519 TT |
178 | if (after_char_processing_hook) |
179 | (*after_char_processing_hook) (); | |
c2c6d25f JM |
180 | } |
181 | ||
b5a0ac70 | 182 | /* Initialize all the necessary variables, start the event loop, |
371d5dec | 183 | register readline, and stdin, start the loop. */ |
b5a0ac70 | 184 | void |
c2c6d25f | 185 | cli_command_loop (void) |
b5a0ac70 | 186 | { |
0f71a2f6 | 187 | /* If we are using readline, set things up and display the first |
371d5dec | 188 | prompt, otherwise just print the prompt. */ |
0f71a2f6 JM |
189 | if (async_command_editing_p) |
190 | { | |
2ed23f5f MS |
191 | int length; |
192 | char *a_prompt; | |
193 | char *gdb_prompt = get_prompt (); | |
194 | ||
371d5dec MS |
195 | /* Tell readline what the prompt to display is and what function |
196 | it will need to call after a whole line is read. This also | |
197 | displays the first prompt. */ | |
2ed23f5f MS |
198 | length = strlen (PREFIX (0)) |
199 | + strlen (gdb_prompt) + strlen (SUFFIX (0)) + 1; | |
200 | a_prompt = (char *) alloca (length); | |
0f71a2f6 | 201 | strcpy (a_prompt, PREFIX (0)); |
9e0b60a8 | 202 | strcat (a_prompt, gdb_prompt); |
0f71a2f6 JM |
203 | strcat (a_prompt, SUFFIX (0)); |
204 | rl_callback_handler_install (a_prompt, input_handler); | |
205 | } | |
206 | else | |
207 | display_gdb_prompt (0); | |
b5a0ac70 | 208 | |
371d5dec | 209 | /* Now it's time to start the event loop. */ |
085dd6e6 | 210 | start_event_loop (); |
b5a0ac70 SS |
211 | } |
212 | ||
213 | /* Change the function to be invoked every time there is a character | |
371d5dec | 214 | ready on stdin. This is used when the user sets the editing off, |
b5a0ac70 | 215 | therefore bypassing readline, and letting gdb handle the input |
371d5dec | 216 | itself, via gdb_readline2. Also it is used in the opposite case in |
b5a0ac70 | 217 | which the user sets editing on again, by restoring readline |
371d5dec | 218 | handling of the input. */ |
392a587b | 219 | static void |
c2c6d25f | 220 | change_line_handler (void) |
b5a0ac70 | 221 | { |
371d5dec MS |
222 | /* NOTE: this operates on input_fd, not instream. If we are reading |
223 | commands from a file, instream will point to the file. However in | |
c2c6d25f | 224 | async mode, we always read commands from a file with editing |
371d5dec MS |
225 | off. This means that the 'set editing on/off' will have effect |
226 | only on the interactive session. */ | |
c2c6d25f | 227 | |
b5a0ac70 SS |
228 | if (async_command_editing_p) |
229 | { | |
371d5dec | 230 | /* Turn on editing by using readline. */ |
c2c6d25f | 231 | call_readline = rl_callback_read_char_wrapper; |
0f71a2f6 | 232 | input_handler = command_line_handler; |
b5a0ac70 SS |
233 | } |
234 | else | |
235 | { | |
371d5dec | 236 | /* Turn off editing by using gdb_readline2. */ |
b5a0ac70 SS |
237 | rl_callback_handler_remove (); |
238 | call_readline = gdb_readline2; | |
0f71a2f6 JM |
239 | |
240 | /* Set up the command handler as well, in case we are called as | |
371d5dec | 241 | first thing from .gdbinit. */ |
0f71a2f6 | 242 | input_handler = command_line_handler; |
b5a0ac70 | 243 | } |
b5a0ac70 SS |
244 | } |
245 | ||
246 | /* Displays the prompt. The prompt that is displayed is the current | |
247 | top of the prompt stack, if the argument NEW_PROMPT is | |
371d5dec | 248 | 0. Otherwise, it displays whatever NEW_PROMPT is. This is used |
b5a0ac70 | 249 | after each gdb command has completed, and in the following cases: |
371d5dec | 250 | 1. When the user enters a command line which is ended by '\' |
0f71a2f6 | 251 | indicating that the command will continue on the next line. |
b5a0ac70 | 252 | In that case the prompt that is displayed is the empty string. |
0f71a2f6 | 253 | 2. When the user is entering 'commands' for a breakpoint, or |
371d5dec | 254 | actions for a tracepoint. In this case the prompt will be '>' |
0f71a2f6 | 255 | 3. Other???? |
371d5dec | 256 | FIXME: 2. & 3. not implemented yet for async. */ |
b5a0ac70 | 257 | void |
c2c6d25f | 258 | display_gdb_prompt (char *new_prompt) |
b5a0ac70 SS |
259 | { |
260 | int prompt_length = 0; | |
c5aa993b | 261 | char *gdb_prompt = get_prompt (); |
b5a0ac70 | 262 | |
16026cd7 AS |
263 | /* Reset the nesting depth used when trace-commands is set. */ |
264 | reset_command_nest_depth (); | |
265 | ||
4389a95a AC |
266 | /* Each interpreter has its own rules on displaying the command |
267 | prompt. */ | |
268 | if (!current_interp_display_prompt_p ()) | |
fb40c209 | 269 | return; |
fb40c209 | 270 | |
8ea051c5 | 271 | if (sync_execution && is_running (inferior_ptid)) |
adf40b2e JM |
272 | { |
273 | /* This is to trick readline into not trying to display the | |
6426a772 JM |
274 | prompt. Even though we display the prompt using this |
275 | function, readline still tries to do its own display if we | |
276 | don't call rl_callback_handler_install and | |
277 | rl_callback_handler_remove (which readline detects because a | |
371d5dec | 278 | global variable is not set). If readline did that, it could |
6426a772 JM |
279 | mess up gdb signal handlers for SIGINT. Readline assumes |
280 | that between calls to rl_set_signals and rl_clear_signals gdb | |
371d5dec | 281 | doesn't do anything with the signal handlers. Well, that's |
6426a772 | 282 | not the case, because when the target executes we change the |
371d5dec | 283 | SIGINT signal handler. If we allowed readline to display the |
6426a772 JM |
284 | prompt, the signal handler change would happen exactly |
285 | between the calls to the above two functions. | |
371d5dec | 286 | Calling rl_callback_handler_remove(), does the job. */ |
adf40b2e JM |
287 | |
288 | rl_callback_handler_remove (); | |
289 | return; | |
290 | } | |
291 | ||
b5a0ac70 SS |
292 | if (!new_prompt) |
293 | { | |
371d5dec | 294 | /* Just use the top of the prompt stack. */ |
b5a0ac70 SS |
295 | prompt_length = strlen (PREFIX (0)) + |
296 | strlen (SUFFIX (0)) + | |
9e0b60a8 | 297 | strlen (gdb_prompt) + 1; |
b5a0ac70 SS |
298 | |
299 | new_prompt = (char *) alloca (prompt_length); | |
300 | ||
371d5dec | 301 | /* Prefix needs to have new line at end. */ |
b5a0ac70 | 302 | strcpy (new_prompt, PREFIX (0)); |
9e0b60a8 | 303 | strcat (new_prompt, gdb_prompt); |
b5a0ac70 | 304 | /* Suffix needs to have a new line at end and \032 \032 at |
371d5dec | 305 | beginning. */ |
b5a0ac70 SS |
306 | strcat (new_prompt, SUFFIX (0)); |
307 | } | |
308 | ||
309 | if (async_command_editing_p) | |
310 | { | |
311 | rl_callback_handler_remove (); | |
312 | rl_callback_handler_install (new_prompt, input_handler); | |
313 | } | |
371d5dec | 314 | /* new_prompt at this point can be the top of the stack or the one |
d014929c MS |
315 | passed in. It can't be NULL. */ |
316 | else | |
b5a0ac70 SS |
317 | { |
318 | /* Don't use a _filtered function here. It causes the assumed | |
319 | character position to be off, since the newline we read from | |
320 | the user is not accounted for. */ | |
321 | fputs_unfiltered (new_prompt, gdb_stdout); | |
b5a0ac70 SS |
322 | gdb_flush (gdb_stdout); |
323 | } | |
324 | } | |
325 | ||
326 | /* Used when the user requests a different annotation level, with | |
371d5dec | 327 | 'set annotate'. It pushes a new prompt (with prefix and suffix) on top |
b5a0ac70 SS |
328 | of the prompt stack, if the annotation level desired is 2, otherwise |
329 | it pops the top of the prompt stack when we want the annotation level | |
371d5dec | 330 | to be the normal ones (1 or 0). */ |
392a587b | 331 | static void |
c2c6d25f | 332 | change_annotation_level (void) |
b5a0ac70 SS |
333 | { |
334 | char *prefix, *suffix; | |
335 | ||
336 | if (!PREFIX (0) || !PROMPT (0) || !SUFFIX (0)) | |
337 | { | |
338 | /* The prompt stack has not been initialized to "", we are | |
371d5dec | 339 | using gdb w/o the --async switch. */ |
8a3fe4f8 | 340 | warning (_("Command has same effect as set annotate")); |
b5a0ac70 SS |
341 | return; |
342 | } | |
343 | ||
344 | if (annotation_level > 1) | |
345 | { | |
346 | if (!strcmp (PREFIX (0), "") && !strcmp (SUFFIX (0), "")) | |
347 | { | |
371d5dec | 348 | /* Push a new prompt if the previous annotation_level was not >1. */ |
b5a0ac70 SS |
349 | prefix = (char *) alloca (strlen (async_annotation_suffix) + 10); |
350 | strcpy (prefix, "\n\032\032pre-"); | |
351 | strcat (prefix, async_annotation_suffix); | |
352 | strcat (prefix, "\n"); | |
353 | ||
354 | suffix = (char *) alloca (strlen (async_annotation_suffix) + 6); | |
355 | strcpy (suffix, "\n\032\032"); | |
356 | strcat (suffix, async_annotation_suffix); | |
357 | strcat (suffix, "\n"); | |
358 | ||
359 | push_prompt (prefix, (char *) 0, suffix); | |
360 | } | |
361 | } | |
362 | else | |
363 | { | |
364 | if (strcmp (PREFIX (0), "") && strcmp (SUFFIX (0), "")) | |
365 | { | |
371d5dec | 366 | /* Pop the top of the stack, we are going back to annotation < 1. */ |
b5a0ac70 SS |
367 | pop_prompt (); |
368 | } | |
369 | } | |
370 | } | |
371 | ||
371d5dec MS |
372 | /* Pushes a new prompt on the prompt stack. Each prompt has three |
373 | parts: prefix, prompt, suffix. Usually prefix and suffix are empty | |
374 | strings, except when the annotation level is 2. Memory is allocated | |
375 | within xstrdup for the new prompt. */ | |
43ff13b4 | 376 | void |
c2c6d25f | 377 | push_prompt (char *prefix, char *prompt, char *suffix) |
b5a0ac70 SS |
378 | { |
379 | the_prompts.top++; | |
1b36a34b | 380 | PREFIX (0) = xstrdup (prefix); |
b5a0ac70 | 381 | |
43ff13b4 | 382 | /* Note that this function is used by the set annotate 2 |
371d5dec MS |
383 | command. This is why we take care of saving the old prompt |
384 | in case a new one is not specified. */ | |
b5a0ac70 | 385 | if (prompt) |
1b36a34b | 386 | PROMPT (0) = xstrdup (prompt); |
b5a0ac70 | 387 | else |
1b36a34b | 388 | PROMPT (0) = xstrdup (PROMPT (-1)); |
b5a0ac70 | 389 | |
1b36a34b | 390 | SUFFIX (0) = xstrdup (suffix); |
b5a0ac70 SS |
391 | } |
392 | ||
371d5dec MS |
393 | /* Pops the top of the prompt stack, and frees the memory allocated |
394 | for it. */ | |
43ff13b4 | 395 | void |
c2c6d25f | 396 | pop_prompt (void) |
b5a0ac70 | 397 | { |
43ff13b4 | 398 | /* If we are not during a 'synchronous' execution command, in which |
371d5dec | 399 | case, the top prompt would be empty. */ |
43ff13b4 JM |
400 | if (strcmp (PROMPT (0), "")) |
401 | /* This is for the case in which the prompt is set while the | |
371d5dec | 402 | annotation level is 2. The top prompt will be changed, but when |
43ff13b4 | 403 | we return to annotation level < 2, we want that new prompt to be |
371d5dec | 404 | in effect, until the user does another 'set prompt'. */ |
43ff13b4 JM |
405 | if (strcmp (PROMPT (0), PROMPT (-1))) |
406 | { | |
b8c9b27d | 407 | xfree (PROMPT (-1)); |
1b36a34b | 408 | PROMPT (-1) = xstrdup (PROMPT (0)); |
43ff13b4 | 409 | } |
b5a0ac70 | 410 | |
b8c9b27d KB |
411 | xfree (PREFIX (0)); |
412 | xfree (PROMPT (0)); | |
413 | xfree (SUFFIX (0)); | |
b5a0ac70 SS |
414 | the_prompts.top--; |
415 | } | |
c2c6d25f JM |
416 | |
417 | /* When there is an event ready on the stdin file desriptor, instead | |
418 | of calling readline directly throught the callback function, or | |
419 | instead of calling gdb_readline2, give gdb a chance to detect | |
371d5dec | 420 | errors and do something. */ |
c2c6d25f | 421 | void |
2acceee2 | 422 | stdin_event_handler (int error, gdb_client_data client_data) |
c2c6d25f JM |
423 | { |
424 | if (error) | |
425 | { | |
a3f17187 | 426 | printf_unfiltered (_("error detected on stdin\n")); |
2acceee2 | 427 | delete_file_handler (input_fd); |
c2c6d25f | 428 | discard_all_continuations (); |
604ead4a | 429 | discard_all_intermediate_continuations (); |
371d5dec | 430 | /* If stdin died, we may as well kill gdb. */ |
c5394b80 | 431 | quit_command ((char *) 0, stdin == instream); |
c2c6d25f JM |
432 | } |
433 | else | |
6426a772 | 434 | (*call_readline) (client_data); |
c2c6d25f JM |
435 | } |
436 | ||
6426a772 JM |
437 | /* Re-enable stdin after the end of an execution command in |
438 | synchronous mode, or after an error from the target, and we aborted | |
371d5dec | 439 | the exec operation. */ |
6426a772 JM |
440 | |
441 | void | |
712af3be | 442 | async_enable_stdin (void) |
6426a772 | 443 | { |
32c1e744 VP |
444 | if (sync_execution) |
445 | { | |
371d5dec | 446 | /* See NOTE in async_disable_stdin(). */ |
32c1e744 VP |
447 | /* FIXME: cagney/1999-09-27: Call this before clearing |
448 | sync_execution. Current target_terminal_ours() implementations | |
371d5dec | 449 | check for sync_execution before switching the terminal. */ |
32c1e744 VP |
450 | target_terminal_ours (); |
451 | pop_prompt (); | |
452 | sync_execution = 0; | |
453 | } | |
6426a772 JM |
454 | } |
455 | ||
456 | /* Disable reads from stdin (the console) marking the command as | |
371d5dec | 457 | synchronous. */ |
6426a772 JM |
458 | |
459 | void | |
460 | async_disable_stdin (void) | |
461 | { | |
d9d2d8b6 PA |
462 | if (!sync_execution) |
463 | { | |
464 | sync_execution = 1; | |
465 | push_prompt ("", "", ""); | |
466 | } | |
6426a772 | 467 | } |
b5a0ac70 | 468 | \f |
6426a772 | 469 | |
371d5dec | 470 | /* Handles a gdb command. This function is called by |
b5a0ac70 | 471 | command_line_handler, which has processed one or more input lines |
371d5dec | 472 | into COMMAND. */ |
392a587b | 473 | /* NOTE: 1999-04-30 This is the asynchronous version of the command_loop |
b5a0ac70 | 474 | function. The command_loop function will be obsolete when we |
371d5dec | 475 | switch to use the event loop at every execution of gdb. */ |
392a587b | 476 | static void |
c2c6d25f | 477 | command_handler (char *command) |
b5a0ac70 | 478 | { |
b5a0ac70 | 479 | int stdin_is_tty = ISATTY (stdin); |
0f3bb72e | 480 | struct cleanup *stat_chain; |
b5a0ac70 | 481 | |
b5a0ac70 SS |
482 | quit_flag = 0; |
483 | if (instream == stdin && stdin_is_tty) | |
484 | reinitialize_more_filter (); | |
b5a0ac70 | 485 | |
371d5dec MS |
486 | /* If readline returned a NULL command, it means that the connection |
487 | with the terminal is gone. This happens at the end of a | |
488 | testsuite run, after Expect has hung up but GDB is still alive. | |
489 | In such a case, we just quit gdb killing the inferior program | |
490 | too. */ | |
b5a0ac70 | 491 | if (command == 0) |
fa3fd85b AS |
492 | { |
493 | printf_unfiltered ("quit\n"); | |
494 | execute_command ("quit", stdin == instream); | |
495 | } | |
b5a0ac70 | 496 | |
0f3bb72e | 497 | stat_chain = make_command_stats_cleanup (1); |
b5a0ac70 SS |
498 | |
499 | execute_command (command, instream == stdin); | |
c5aa993b | 500 | |
347bddb7 PA |
501 | /* Do any commands attached to breakpoint we stopped at. */ |
502 | bpstat_do_actions (); | |
c5aa993b | 503 | |
0f3bb72e | 504 | do_cleanups (stat_chain); |
43ff13b4 JM |
505 | } |
506 | ||
371d5dec MS |
507 | /* Handle a complete line of input. This is called by the callback |
508 | mechanism within the readline library. Deal with incomplete | |
509 | commands as well, by saving the partial input in a global | |
510 | buffer. */ | |
b5a0ac70 | 511 | |
392a587b | 512 | /* NOTE: 1999-04-30 This is the asynchronous version of the |
371d5dec | 513 | command_line_input function; command_line_input will become |
b5a0ac70 | 514 | obsolete once we use the event loop as the default mechanism in |
371d5dec | 515 | GDB. */ |
b5a0ac70 | 516 | static void |
c2c6d25f | 517 | command_line_handler (char *rl) |
b5a0ac70 SS |
518 | { |
519 | static char *linebuffer = 0; | |
520 | static unsigned linelength = 0; | |
52f0bd74 | 521 | char *p; |
b5a0ac70 | 522 | char *p1; |
b5a0ac70 SS |
523 | char *nline; |
524 | char got_eof = 0; | |
525 | ||
b5a0ac70 SS |
526 | int repeat = (instream == stdin); |
527 | ||
528 | if (annotation_level > 1 && instream == stdin) | |
529 | { | |
a3f17187 | 530 | printf_unfiltered (("\n\032\032post-")); |
306d9ac5 | 531 | puts_unfiltered (async_annotation_suffix); |
a3f17187 | 532 | printf_unfiltered (("\n")); |
b5a0ac70 SS |
533 | } |
534 | ||
535 | if (linebuffer == 0) | |
536 | { | |
537 | linelength = 80; | |
538 | linebuffer = (char *) xmalloc (linelength); | |
539 | } | |
540 | ||
541 | p = linebuffer; | |
542 | ||
543 | if (more_to_come) | |
544 | { | |
545 | strcpy (linebuffer, readline_input_state.linebuffer); | |
546 | p = readline_input_state.linebuffer_ptr; | |
b8c9b27d | 547 | xfree (readline_input_state.linebuffer); |
b5a0ac70 | 548 | more_to_come = 0; |
adf40b2e | 549 | pop_prompt (); |
b5a0ac70 SS |
550 | } |
551 | ||
552 | #ifdef STOP_SIGNAL | |
553 | if (job_control) | |
0f71a2f6 | 554 | signal (STOP_SIGNAL, handle_stop_sig); |
b5a0ac70 SS |
555 | #endif |
556 | ||
557 | /* Make sure that all output has been output. Some machines may let | |
371d5dec MS |
558 | you get away with leaving out some of the gdb_flush, but not |
559 | all. */ | |
b5a0ac70 SS |
560 | wrap_here (""); |
561 | gdb_flush (gdb_stdout); | |
562 | gdb_flush (gdb_stderr); | |
563 | ||
564 | if (source_file_name != NULL) | |
637537d0 | 565 | ++source_line_number; |
b5a0ac70 SS |
566 | |
567 | /* If we are in this case, then command_handler will call quit | |
371d5dec | 568 | and exit from gdb. */ |
b5a0ac70 SS |
569 | if (!rl || rl == (char *) EOF) |
570 | { | |
571 | got_eof = 1; | |
572 | command_handler (0); | |
371d5dec | 573 | return; /* Lint. */ |
b5a0ac70 SS |
574 | } |
575 | if (strlen (rl) + 1 + (p - linebuffer) > linelength) | |
576 | { | |
577 | linelength = strlen (rl) + 1 + (p - linebuffer); | |
578 | nline = (char *) xrealloc (linebuffer, linelength); | |
579 | p += nline - linebuffer; | |
580 | linebuffer = nline; | |
581 | } | |
582 | p1 = rl; | |
583 | /* Copy line. Don't copy null at end. (Leaves line alone | |
371d5dec | 584 | if this was just a newline). */ |
b5a0ac70 SS |
585 | while (*p1) |
586 | *p++ = *p1++; | |
587 | ||
b8c9b27d | 588 | xfree (rl); /* Allocated in readline. */ |
b5a0ac70 | 589 | |
4dd79c29 | 590 | if (p > linebuffer && *(p - 1) == '\\') |
b5a0ac70 | 591 | { |
20bb6bc8 | 592 | *p = '\0'; |
b5a0ac70 SS |
593 | p--; /* Put on top of '\'. */ |
594 | ||
1b36a34b | 595 | readline_input_state.linebuffer = xstrdup (linebuffer); |
d96429cd AS |
596 | readline_input_state.linebuffer_ptr = p; |
597 | ||
598 | /* We will not invoke a execute_command if there is more | |
371d5dec MS |
599 | input expected to complete the command. So, we need to |
600 | print an empty prompt here. */ | |
d96429cd AS |
601 | more_to_come = 1; |
602 | push_prompt ("", "", ""); | |
603 | display_gdb_prompt (0); | |
604 | return; | |
b5a0ac70 SS |
605 | } |
606 | ||
607 | #ifdef STOP_SIGNAL | |
608 | if (job_control) | |
609 | signal (STOP_SIGNAL, SIG_DFL); | |
610 | #endif | |
611 | ||
612 | #define SERVER_COMMAND_LENGTH 7 | |
613 | server_command = | |
614 | (p - linebuffer > SERVER_COMMAND_LENGTH) | |
bf896cb0 | 615 | && strncmp (linebuffer, "server ", SERVER_COMMAND_LENGTH) == 0; |
b5a0ac70 SS |
616 | if (server_command) |
617 | { | |
618 | /* Note that we don't set `line'. Between this and the check in | |
619 | dont_repeat, this insures that repeating will still do the | |
620 | right thing. */ | |
621 | *p = '\0'; | |
622 | command_handler (linebuffer + SERVER_COMMAND_LENGTH); | |
623 | display_gdb_prompt (0); | |
624 | return; | |
625 | } | |
626 | ||
627 | /* Do history expansion if that is wished. */ | |
628 | if (history_expansion_p && instream == stdin | |
629 | && ISATTY (instream)) | |
630 | { | |
631 | char *history_value; | |
632 | int expanded; | |
633 | ||
634 | *p = '\0'; /* Insert null now. */ | |
635 | expanded = history_expand (linebuffer, &history_value); | |
636 | if (expanded) | |
637 | { | |
638 | /* Print the changes. */ | |
639 | printf_unfiltered ("%s\n", history_value); | |
640 | ||
641 | /* If there was an error, call this function again. */ | |
642 | if (expanded < 0) | |
643 | { | |
b8c9b27d | 644 | xfree (history_value); |
b5a0ac70 SS |
645 | return; |
646 | } | |
647 | if (strlen (history_value) > linelength) | |
648 | { | |
649 | linelength = strlen (history_value) + 1; | |
650 | linebuffer = (char *) xrealloc (linebuffer, linelength); | |
651 | } | |
652 | strcpy (linebuffer, history_value); | |
653 | p = linebuffer + strlen (linebuffer); | |
b5a0ac70 | 654 | } |
f5b73fbb | 655 | xfree (history_value); |
b5a0ac70 SS |
656 | } |
657 | ||
371d5dec MS |
658 | /* If we just got an empty line, and that is supposed to repeat the |
659 | previous command, return the value in the global buffer. */ | |
b5a0ac70 SS |
660 | if (repeat && p == linebuffer && *p != '\\') |
661 | { | |
dc7eb48e | 662 | command_handler (saved_command_line); |
b5a0ac70 SS |
663 | display_gdb_prompt (0); |
664 | return; | |
665 | } | |
666 | ||
667 | for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++); | |
668 | if (repeat && !*p1) | |
669 | { | |
dc7eb48e | 670 | command_handler (saved_command_line); |
b5a0ac70 SS |
671 | display_gdb_prompt (0); |
672 | return; | |
673 | } | |
674 | ||
675 | *p = 0; | |
676 | ||
677 | /* Add line to history if appropriate. */ | |
678 | if (instream == stdin | |
679 | && ISATTY (stdin) && *linebuffer) | |
680 | add_history (linebuffer); | |
681 | ||
682 | /* Note: lines consisting solely of comments are added to the command | |
683 | history. This is useful when you type a command, and then | |
684 | realize you don't want to execute it quite yet. You can comment | |
685 | out the command and then later fetch it from the value history | |
686 | and remove the '#'. The kill ring is probably better, but some | |
687 | people are in the habit of commenting things out. */ | |
688 | if (*p1 == '#') | |
371d5dec | 689 | *p1 = '\0'; /* Found a comment. */ |
b5a0ac70 SS |
690 | |
691 | /* Save into global buffer if appropriate. */ | |
692 | if (repeat) | |
693 | { | |
dc7eb48e | 694 | if (linelength > saved_command_line_size) |
b5a0ac70 | 695 | { |
dc7eb48e PA |
696 | saved_command_line = xrealloc (saved_command_line, linelength); |
697 | saved_command_line_size = linelength; | |
b5a0ac70 | 698 | } |
dc7eb48e | 699 | strcpy (saved_command_line, linebuffer); |
b5a0ac70 SS |
700 | if (!more_to_come) |
701 | { | |
dc7eb48e | 702 | command_handler (saved_command_line); |
b5a0ac70 SS |
703 | display_gdb_prompt (0); |
704 | } | |
705 | return; | |
706 | } | |
707 | ||
708 | command_handler (linebuffer); | |
709 | display_gdb_prompt (0); | |
710 | return; | |
711 | } | |
712 | ||
713 | /* Does reading of input from terminal w/o the editing features | |
371d5dec | 714 | provided by the readline library. */ |
b5a0ac70 | 715 | |
371d5dec | 716 | /* NOTE: 1999-04-30 Asynchronous version of gdb_readline; gdb_readline |
b5a0ac70 | 717 | will become obsolete when the event loop is made the default |
371d5dec | 718 | execution for gdb. */ |
085dd6e6 | 719 | void |
c2c6d25f | 720 | gdb_readline2 (gdb_client_data client_data) |
b5a0ac70 SS |
721 | { |
722 | int c; | |
723 | char *result; | |
724 | int input_index = 0; | |
725 | int result_size = 80; | |
7be570e7 JM |
726 | static int done_once = 0; |
727 | ||
728 | /* Unbuffer the input stream, so that, later on, the calls to fgetc | |
371d5dec | 729 | fetch only one char at the time from the stream. The fgetc's will |
7be570e7 | 730 | get up to the first newline, but there may be more chars in the |
371d5dec | 731 | stream after '\n'. If we buffer the input and fgetc drains the |
7be570e7 | 732 | stream, getting stuff beyond the newline as well, a select, done |
371d5dec | 733 | afterwards will not trigger. */ |
7be570e7 JM |
734 | if (!done_once && !ISATTY (instream)) |
735 | { | |
736 | setbuf (instream, NULL); | |
737 | done_once = 1; | |
738 | } | |
b5a0ac70 SS |
739 | |
740 | result = (char *) xmalloc (result_size); | |
741 | ||
742 | /* We still need the while loop here, even though it would seem | |
743 | obvious to invoke gdb_readline2 at every character entered. If | |
744 | not using the readline library, the terminal is in cooked mode, | |
371d5dec MS |
745 | which sends the characters all at once. Poll will notice that the |
746 | input fd has changed state only after enter is pressed. At this | |
747 | point we still need to fetch all the chars entered. */ | |
b5a0ac70 SS |
748 | |
749 | while (1) | |
750 | { | |
751 | /* Read from stdin if we are executing a user defined command. | |
752 | This is the right thing for prompt_for_continue, at least. */ | |
753 | c = fgetc (instream ? instream : stdin); | |
754 | ||
755 | if (c == EOF) | |
756 | { | |
757 | if (input_index > 0) | |
371d5dec MS |
758 | /* The last line does not end with a newline. Return it, |
759 | and if we are called again fgetc will still return EOF | |
760 | and we'll return NULL then. */ | |
b5a0ac70 | 761 | break; |
b8c9b27d | 762 | xfree (result); |
0f71a2f6 | 763 | (*input_handler) (0); |
13ce7133 | 764 | return; |
b5a0ac70 SS |
765 | } |
766 | ||
767 | if (c == '\n') | |
b5a0ac70 SS |
768 | { |
769 | if (input_index > 0 && result[input_index - 1] == '\r') | |
770 | input_index--; | |
771 | break; | |
772 | } | |
b5a0ac70 SS |
773 | |
774 | result[input_index++] = c; | |
775 | while (input_index >= result_size) | |
776 | { | |
777 | result_size *= 2; | |
778 | result = (char *) xrealloc (result, result_size); | |
779 | } | |
780 | } | |
781 | ||
782 | result[input_index++] = '\0'; | |
0f71a2f6 | 783 | (*input_handler) (result); |
b5a0ac70 SS |
784 | } |
785 | \f | |
786 | ||
787 | /* Initialization of signal handlers and tokens. There is a function | |
371d5dec | 788 | handle_sig* for each of the signals GDB cares about. Specifically: |
b5a0ac70 SS |
789 | SIGINT, SIGFPE, SIGQUIT, SIGTSTP, SIGHUP, SIGWINCH. These |
790 | functions are the actual signal handlers associated to the signals | |
791 | via calls to signal(). The only job for these functions is to | |
792 | enqueue the appropriate event/procedure with the event loop. Such | |
371d5dec | 793 | procedures are the old signal handlers. The event loop will take |
b5a0ac70 | 794 | care of invoking the queued procedures to perform the usual tasks |
371d5dec | 795 | associated with the reception of the signal. */ |
392a587b | 796 | /* NOTE: 1999-04-30 This is the asynchronous version of init_signals. |
b5a0ac70 | 797 | init_signals will become obsolete as we move to have to event loop |
371d5dec | 798 | as the default for gdb. */ |
b5a0ac70 | 799 | void |
c2c6d25f | 800 | async_init_signals (void) |
c5aa993b | 801 | { |
b5a0ac70 SS |
802 | signal (SIGINT, handle_sigint); |
803 | sigint_token = | |
0f71a2f6 | 804 | create_async_signal_handler (async_request_quit, NULL); |
a7266fef | 805 | signal (SIGTERM, handle_sigterm); |
b5a0ac70 SS |
806 | |
807 | /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed | |
808 | to the inferior and breakpoints will be ignored. */ | |
809 | #ifdef SIGTRAP | |
810 | signal (SIGTRAP, SIG_DFL); | |
811 | #endif | |
812 | ||
6d318c73 | 813 | #ifdef SIGQUIT |
b5a0ac70 SS |
814 | /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get |
815 | passed to the inferior, which we don't want. It would be | |
816 | possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but | |
817 | on BSD4.3 systems using vfork, that can affect the | |
818 | GDB process as well as the inferior (the signal handling tables | |
819 | might be in memory, shared between the two). Since we establish | |
820 | a handler for SIGQUIT, when we call exec it will set the signal | |
821 | to SIG_DFL for us. */ | |
822 | signal (SIGQUIT, handle_sigquit); | |
823 | sigquit_token = | |
0f71a2f6 | 824 | create_async_signal_handler (async_do_nothing, NULL); |
6d318c73 | 825 | #endif |
b5a0ac70 SS |
826 | #ifdef SIGHUP |
827 | if (signal (SIGHUP, handle_sighup) != SIG_IGN) | |
828 | sighup_token = | |
0f71a2f6 | 829 | create_async_signal_handler (async_disconnect, NULL); |
b5a0ac70 SS |
830 | else |
831 | sighup_token = | |
0f71a2f6 | 832 | create_async_signal_handler (async_do_nothing, NULL); |
b5a0ac70 SS |
833 | #endif |
834 | signal (SIGFPE, handle_sigfpe); | |
835 | sigfpe_token = | |
0f71a2f6 | 836 | create_async_signal_handler (async_float_handler, NULL); |
b5a0ac70 SS |
837 | |
838 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) | |
839 | signal (SIGWINCH, handle_sigwinch); | |
840 | sigwinch_token = | |
0f71a2f6 | 841 | create_async_signal_handler (SIGWINCH_HANDLER, NULL); |
b5a0ac70 | 842 | #endif |
0f71a2f6 JM |
843 | #ifdef STOP_SIGNAL |
844 | sigtstp_token = | |
845 | create_async_signal_handler (async_stop_sig, NULL); | |
846 | #endif | |
847 | ||
848 | } | |
849 | ||
c5aa993b | 850 | void |
97bb9d91 | 851 | mark_async_signal_handler_wrapper (void *token) |
0f71a2f6 | 852 | { |
c2c6d25f | 853 | mark_async_signal_handler ((struct async_signal_handler *) token); |
b5a0ac70 SS |
854 | } |
855 | ||
371d5dec MS |
856 | /* Tell the event loop what to do if SIGINT is received. |
857 | See event-signal.c. */ | |
c5aa993b | 858 | void |
c2c6d25f | 859 | handle_sigint (int sig) |
b5a0ac70 SS |
860 | { |
861 | signal (sig, handle_sigint); | |
862 | ||
5f960e00 FF |
863 | /* We could be running in a loop reading in symfiles or something so |
864 | it may be quite a while before we get back to the event loop. So | |
371d5dec | 865 | set quit_flag to 1 here. Then if QUIT is called before we get to |
5f960e00 FF |
866 | the event loop, we will unwind as expected. */ |
867 | ||
868 | quit_flag = 1; | |
869 | ||
b5a0ac70 | 870 | /* If immediate_quit is set, we go ahead and process the SIGINT right |
371d5dec | 871 | away, even if we usually would defer this to the event loop. The |
b5a0ac70 | 872 | assumption here is that it is safe to process ^C immediately if |
371d5dec | 873 | immediate_quit is set. If we didn't, SIGINT would be really |
b5a0ac70 SS |
874 | processed only the next time through the event loop. To get to |
875 | that point, though, the command that we want to interrupt needs to | |
b803fb0f | 876 | finish first, which is unacceptable. If immediate quit is not set, |
371d5dec | 877 | we process SIGINT the next time through the loop, which is fine. */ |
b803fb0f | 878 | gdb_call_async_signal_handler (sigint_token, immediate_quit); |
b5a0ac70 SS |
879 | } |
880 | ||
a7266fef AS |
881 | /* Quit GDB if SIGTERM is received. |
882 | GDB would quit anyway, but this way it will clean up properly. */ | |
883 | void | |
884 | handle_sigterm (int sig) | |
885 | { | |
886 | signal (sig, handle_sigterm); | |
887 | quit_force ((char *) 0, stdin == instream); | |
888 | } | |
889 | ||
371d5dec | 890 | /* Do the quit. All the checks have been done by the caller. */ |
c5aa993b | 891 | void |
c2c6d25f | 892 | async_request_quit (gdb_client_data arg) |
b5a0ac70 | 893 | { |
5f960e00 | 894 | /* If the quit_flag has gotten reset back to 0 by the time we get |
4ac94eda FF |
895 | back here, that means that an exception was thrown to unwind the |
896 | current command before we got back to the event loop. So there | |
897 | is no reason to call quit again here, unless immediate_quit is | |
371d5dec | 898 | set. */ |
5f960e00 | 899 | |
4ac94eda FF |
900 | if (quit_flag || immediate_quit) |
901 | quit (); | |
b5a0ac70 SS |
902 | } |
903 | ||
6d318c73 | 904 | #ifdef SIGQUIT |
371d5dec MS |
905 | /* Tell the event loop what to do if SIGQUIT is received. |
906 | See event-signal.c. */ | |
c5aa993b | 907 | static void |
c2c6d25f | 908 | handle_sigquit (int sig) |
b5a0ac70 | 909 | { |
0f71a2f6 | 910 | mark_async_signal_handler_wrapper (sigquit_token); |
b5a0ac70 SS |
911 | signal (sig, handle_sigquit); |
912 | } | |
6d318c73 | 913 | #endif |
b5a0ac70 | 914 | |
0f0b8dcd DJ |
915 | #if defined (SIGQUIT) || defined (SIGHUP) |
916 | /* Called by the event loop in response to a SIGQUIT or an | |
917 | ignored SIGHUP. */ | |
c5aa993b | 918 | static void |
c2c6d25f | 919 | async_do_nothing (gdb_client_data arg) |
b5a0ac70 | 920 | { |
371d5dec | 921 | /* Empty function body. */ |
b5a0ac70 | 922 | } |
0f0b8dcd | 923 | #endif |
b5a0ac70 SS |
924 | |
925 | #ifdef SIGHUP | |
371d5dec MS |
926 | /* Tell the event loop what to do if SIGHUP is received. |
927 | See event-signal.c. */ | |
c5aa993b | 928 | static void |
fba45db2 | 929 | handle_sighup (int sig) |
b5a0ac70 | 930 | { |
0f71a2f6 | 931 | mark_async_signal_handler_wrapper (sighup_token); |
b5a0ac70 SS |
932 | signal (sig, handle_sighup); |
933 | } | |
934 | ||
371d5dec | 935 | /* Called by the event loop to process a SIGHUP. */ |
c5aa993b | 936 | static void |
c2c6d25f | 937 | async_disconnect (gdb_client_data arg) |
b5a0ac70 SS |
938 | { |
939 | catch_errors (quit_cover, NULL, | |
940 | "Could not kill the program being debugged", | |
941 | RETURN_MASK_ALL); | |
371d5dec | 942 | signal (SIGHUP, SIG_DFL); /*FIXME: ??????????? */ |
ec4dfccf | 943 | raise (SIGHUP); |
b5a0ac70 SS |
944 | } |
945 | #endif | |
946 | ||
0f71a2f6 | 947 | #ifdef STOP_SIGNAL |
c5aa993b | 948 | void |
c2c6d25f | 949 | handle_stop_sig (int sig) |
0f71a2f6 | 950 | { |
c5aa993b JM |
951 | mark_async_signal_handler_wrapper (sigtstp_token); |
952 | signal (sig, handle_stop_sig); | |
0f71a2f6 JM |
953 | } |
954 | ||
955 | static void | |
c2c6d25f | 956 | async_stop_sig (gdb_client_data arg) |
0f71a2f6 | 957 | { |
c5aa993b | 958 | char *prompt = get_prompt (); |
d7f9d729 | 959 | |
0f71a2f6 JM |
960 | #if STOP_SIGNAL == SIGTSTP |
961 | signal (SIGTSTP, SIG_DFL); | |
2acceee2 JM |
962 | #if HAVE_SIGPROCMASK |
963 | { | |
964 | sigset_t zero; | |
46711df8 | 965 | |
2acceee2 JM |
966 | sigemptyset (&zero); |
967 | sigprocmask (SIG_SETMASK, &zero, 0); | |
968 | } | |
46711df8 | 969 | #elif HAVE_SIGSETMASK |
0f71a2f6 | 970 | sigsetmask (0); |
2acceee2 | 971 | #endif |
ec4dfccf | 972 | raise (SIGTSTP); |
0f71a2f6 JM |
973 | signal (SIGTSTP, handle_stop_sig); |
974 | #else | |
975 | signal (STOP_SIGNAL, handle_stop_sig); | |
976 | #endif | |
977 | printf_unfiltered ("%s", prompt); | |
978 | gdb_flush (gdb_stdout); | |
979 | ||
371d5dec MS |
980 | /* Forget about any previous command -- null line now will do |
981 | nothing. */ | |
0f71a2f6 JM |
982 | dont_repeat (); |
983 | } | |
984 | #endif /* STOP_SIGNAL */ | |
985 | ||
371d5dec MS |
986 | /* Tell the event loop what to do if SIGFPE is received. |
987 | See event-signal.c. */ | |
c5aa993b | 988 | static void |
c2c6d25f | 989 | handle_sigfpe (int sig) |
b5a0ac70 | 990 | { |
0f71a2f6 | 991 | mark_async_signal_handler_wrapper (sigfpe_token); |
b5a0ac70 SS |
992 | signal (sig, handle_sigfpe); |
993 | } | |
994 | ||
371d5dec | 995 | /* Event loop will call this functin to process a SIGFPE. */ |
c5aa993b | 996 | static void |
c2c6d25f | 997 | async_float_handler (gdb_client_data arg) |
b5a0ac70 | 998 | { |
371d5dec MS |
999 | /* This message is based on ANSI C, section 4.7. Note that integer |
1000 | divide by zero causes this, so "float" is a misnomer. */ | |
8a3fe4f8 | 1001 | error (_("Erroneous arithmetic operation.")); |
b5a0ac70 SS |
1002 | } |
1003 | ||
371d5dec MS |
1004 | /* Tell the event loop what to do if SIGWINCH is received. |
1005 | See event-signal.c. */ | |
b5a0ac70 | 1006 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
c5aa993b | 1007 | static void |
c2c6d25f | 1008 | handle_sigwinch (int sig) |
b5a0ac70 | 1009 | { |
0f71a2f6 | 1010 | mark_async_signal_handler_wrapper (sigwinch_token); |
b5a0ac70 SS |
1011 | signal (sig, handle_sigwinch); |
1012 | } | |
1013 | #endif | |
1014 | \f | |
1015 | ||
1016 | /* Called by do_setshow_command. */ | |
b5a0ac70 | 1017 | void |
371d5dec MS |
1018 | set_async_editing_command (char *args, int from_tty, |
1019 | struct cmd_list_element *c) | |
b5a0ac70 SS |
1020 | { |
1021 | change_line_handler (); | |
1022 | } | |
1023 | ||
1024 | /* Called by do_setshow_command. */ | |
b5a0ac70 | 1025 | void |
371d5dec MS |
1026 | set_async_annotation_level (char *args, int from_tty, |
1027 | struct cmd_list_element *c) | |
b5a0ac70 SS |
1028 | { |
1029 | change_annotation_level (); | |
1030 | } | |
1031 | ||
1032 | /* Called by do_setshow_command. */ | |
b5a0ac70 | 1033 | void |
c2c6d25f | 1034 | set_async_prompt (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 | 1035 | { |
1b36a34b | 1036 | PROMPT (0) = xstrdup (new_async_prompt); |
b5a0ac70 SS |
1037 | } |
1038 | ||
0f71a2f6 JM |
1039 | /* Set things up for readline to be invoked via the alternate |
1040 | interface, i.e. via a callback function (rl_callback_read_char), | |
371d5dec | 1041 | and hook up instream to the event loop. */ |
0f71a2f6 | 1042 | void |
cee6ddeb | 1043 | gdb_setup_readline (void) |
0f71a2f6 | 1044 | { |
362646f5 AC |
1045 | /* This function is a noop for the sync case. The assumption is |
1046 | that the sync setup is ALL done in gdb_init, and we would only | |
1047 | mess it up here. The sync stuff should really go away over | |
1048 | time. */ | |
1a088d06 AS |
1049 | if (!batch_silent) |
1050 | gdb_stdout = stdio_fileopen (stdout); | |
362646f5 AC |
1051 | gdb_stderr = stdio_fileopen (stderr); |
1052 | gdb_stdlog = gdb_stderr; /* for moment */ | |
1053 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
8d4d924b | 1054 | gdb_stdtargerr = gdb_stderr; /* for moment */ |
362646f5 AC |
1055 | |
1056 | /* If the input stream is connected to a terminal, turn on | |
1057 | editing. */ | |
1058 | if (ISATTY (instream)) | |
9e0b60a8 | 1059 | { |
371d5dec | 1060 | /* Tell gdb that we will be using the readline library. This |
362646f5 AC |
1061 | could be overwritten by a command in .gdbinit like 'set |
1062 | editing on' or 'off'. */ | |
1063 | async_command_editing_p = 1; | |
c5201926 | 1064 | |
362646f5 AC |
1065 | /* When a character is detected on instream by select or poll, |
1066 | readline will be invoked via this callback function. */ | |
1067 | call_readline = rl_callback_read_char_wrapper; | |
9e0b60a8 | 1068 | } |
362646f5 AC |
1069 | else |
1070 | { | |
1071 | async_command_editing_p = 0; | |
1072 | call_readline = gdb_readline2; | |
1073 | } | |
1074 | ||
1075 | /* When readline has read an end-of-line character, it passes the | |
371d5dec | 1076 | complete line to gdb for processing; command_line_handler is the |
362646f5 AC |
1077 | function that does this. */ |
1078 | input_handler = command_line_handler; | |
1079 | ||
371d5dec | 1080 | /* Tell readline to use the same input stream that gdb uses. */ |
362646f5 AC |
1081 | rl_instream = instream; |
1082 | ||
1083 | /* Get a file descriptor for the input stream, so that we can | |
1084 | register it with the event loop. */ | |
1085 | input_fd = fileno (instream); | |
1086 | ||
1087 | /* Now we need to create the event sources for the input file | |
1088 | descriptor. */ | |
1089 | /* At this point in time, this is the only event source that we | |
371d5dec | 1090 | register with the even loop. Another source is going to be the |
362646f5 AC |
1091 | target program (inferior), but that must be registered only when |
1092 | it actually exists (I.e. after we say 'run' or after we connect | |
1093 | to a remote target. */ | |
1094 | add_file_handler (input_fd, stdin_event_handler, 0); | |
0f71a2f6 | 1095 | } |
cee6ddeb | 1096 | |
7d5b6fdd EZ |
1097 | /* Disable command input through the standard CLI channels. Used in |
1098 | the suspend proc for interpreters that use the standard gdb readline | |
1099 | interface, like the cli & the mi. */ | |
1100 | void | |
1101 | gdb_disable_readline (void) | |
1102 | { | |
362646f5 AC |
1103 | /* FIXME - It is too heavyweight to delete and remake these every |
1104 | time you run an interpreter that needs readline. It is probably | |
1105 | better to have the interpreters cache these, which in turn means | |
1106 | that this needs to be moved into interpreter specific code. */ | |
7d5b6fdd EZ |
1107 | |
1108 | #if 0 | |
362646f5 AC |
1109 | ui_file_delete (gdb_stdout); |
1110 | ui_file_delete (gdb_stderr); | |
1111 | gdb_stdlog = NULL; | |
1112 | gdb_stdtarg = NULL; | |
8d4d924b | 1113 | gdb_stdtargerr = NULL; |
7d5b6fdd EZ |
1114 | #endif |
1115 | ||
362646f5 AC |
1116 | rl_callback_handler_remove (); |
1117 | delete_file_handler (input_fd); | |
7d5b6fdd | 1118 | } |