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" |
d17b6f81 | 36 | #include "observer.h" |
be34f849 | 37 | #include "continuations.h" |
371d5dec | 38 | #include "gdbcmd.h" /* for dont_repeat() */ |
104c1213 | 39 | |
371d5dec | 40 | /* readline include files. */ |
dbda9972 AC |
41 | #include "readline/readline.h" |
42 | #include "readline/history.h" | |
b5a0ac70 SS |
43 | |
44 | /* readline defines this. */ | |
45 | #undef savestring | |
46 | ||
c2c6d25f JM |
47 | static void rl_callback_read_char_wrapper (gdb_client_data client_data); |
48 | static void command_line_handler (char *rl); | |
c2c6d25f JM |
49 | static void change_line_handler (void); |
50 | static void change_annotation_level (void); | |
51 | static void command_handler (char *command); | |
b5a0ac70 | 52 | |
371d5dec | 53 | /* Signal handlers. */ |
6d318c73 | 54 | #ifdef SIGQUIT |
c2c6d25f | 55 | static void handle_sigquit (int sig); |
6d318c73 | 56 | #endif |
0f0b8dcd | 57 | #ifdef SIGHUP |
c2c6d25f | 58 | static void handle_sighup (int sig); |
0f0b8dcd | 59 | #endif |
c2c6d25f | 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 | |
371d5dec | 66 | signals. */ |
0f0b8dcd | 67 | #if defined (SIGQUIT) || defined (SIGHUP) |
c2c6d25f | 68 | static void async_do_nothing (gdb_client_data); |
0f0b8dcd DJ |
69 | #endif |
70 | #ifdef SIGHUP | |
c2c6d25f | 71 | static void async_disconnect (gdb_client_data); |
0f0b8dcd | 72 | #endif |
c2c6d25f | 73 | static void async_float_handler (gdb_client_data); |
0f0b8dcd | 74 | #ifdef STOP_SIGNAL |
c2c6d25f | 75 | static void async_stop_sig (gdb_client_data); |
0f0b8dcd | 76 | #endif |
b5a0ac70 | 77 | |
b5a0ac70 | 78 | /* Readline offers an alternate interface, via callback |
371d5dec | 79 | functions. These are all included in the file callback.c in the |
b5a0ac70 SS |
80 | readline distribution. This file provides (mainly) a function, which |
81 | the event loop uses as callback (i.e. event handler) whenever an event | |
82 | is detected on the standard input file descriptor. | |
83 | readline_callback_read_char is called (by the GDB event loop) whenever | |
371d5dec | 84 | there is a new character ready on the input stream. This function |
b5a0ac70 SS |
85 | incrementally builds a buffer internal to readline where it |
86 | accumulates the line read up to the point of invocation. In the | |
87 | special case in which the character read is newline, the function | |
88 | invokes a GDB supplied callback routine, which does the processing of | |
89 | a full command line. This latter routine is the asynchronous analog | |
371d5dec | 90 | of the old command_line_input in gdb. Instead of invoking (and waiting |
b5a0ac70 SS |
91 | for) readline to read the command line and pass it back to |
92 | command_loop for processing, the new command_line_handler function has | |
93 | the command line already available as its parameter. INPUT_HANDLER is | |
94 | to be set to the function that readline will invoke when a complete | |
95 | line of input is ready. CALL_READLINE is to be set to the function | |
371d5dec | 96 | that readline offers as callback to the event_loop. */ |
b5a0ac70 | 97 | |
c2c6d25f JM |
98 | void (*input_handler) (char *); |
99 | void (*call_readline) (gdb_client_data); | |
b5a0ac70 | 100 | |
371d5dec | 101 | /* Important variables for the event loop. */ |
b5a0ac70 SS |
102 | |
103 | /* This is used to determine if GDB is using the readline library or | |
371d5dec | 104 | its own simplified form of readline. It is used by the asynchronous |
0f71a2f6 | 105 | form of the set editing command. |
392a587b | 106 | ezannoni: as of 1999-04-29 I expect that this |
b5a0ac70 | 107 | variable will not be used after gdb is changed to use the event |
371d5dec | 108 | loop as default engine, and event-top.c is merged into top.c. */ |
b5a0ac70 SS |
109 | int async_command_editing_p; |
110 | ||
111 | /* This variable contains the new prompt that the user sets with the | |
371d5dec | 112 | set prompt command. */ |
b5a0ac70 SS |
113 | char *new_async_prompt; |
114 | ||
115 | /* This is the annotation suffix that will be used when the | |
371d5dec | 116 | annotation_level is 2. */ |
b5a0ac70 SS |
117 | char *async_annotation_suffix; |
118 | ||
104c1213 | 119 | /* This is used to display the notification of the completion of an |
371d5dec | 120 | asynchronous execution command. */ |
104c1213 JM |
121 | int exec_done_display_p = 0; |
122 | ||
b5a0ac70 | 123 | /* This is the file descriptor for the input stream that GDB uses to |
371d5dec | 124 | read commands from. */ |
b5a0ac70 SS |
125 | int input_fd; |
126 | ||
371d5dec | 127 | /* This is the prompt stack. Prompts will be pushed on the stack as |
b5a0ac70 | 128 | needed by the different 'kinds' of user inputs GDB is asking |
371d5dec | 129 | for. See event-loop.h. */ |
b5a0ac70 SS |
130 | struct prompts the_prompts; |
131 | ||
371d5dec | 132 | /* Signal handling variables. */ |
b5a0ac70 | 133 | /* Each of these is a pointer to a function that the event loop will |
371d5dec | 134 | invoke if the corresponding signal has received. The real signal |
b5a0ac70 | 135 | handlers mark these functions as ready to be executed and the event |
371d5dec MS |
136 | loop, in a later iteration, calls them. See the function |
137 | invoke_async_signal_handler. */ | |
97bb9d91 | 138 | void *sigint_token; |
b5a0ac70 | 139 | #ifdef SIGHUP |
97bb9d91 | 140 | void *sighup_token; |
b5a0ac70 | 141 | #endif |
6d318c73 | 142 | #ifdef SIGQUIT |
97bb9d91 | 143 | void *sigquit_token; |
6d318c73 | 144 | #endif |
97bb9d91 | 145 | void *sigfpe_token; |
b5a0ac70 | 146 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
97bb9d91 | 147 | void *sigwinch_token; |
b5a0ac70 | 148 | #endif |
0f71a2f6 | 149 | #ifdef STOP_SIGNAL |
97bb9d91 | 150 | void *sigtstp_token; |
0f71a2f6 JM |
151 | #endif |
152 | ||
b5a0ac70 | 153 | /* Structure to save a partially entered command. This is used when |
371d5dec | 154 | the user types '\' at the end of a command line. This is necessary |
b5a0ac70 SS |
155 | because each line of input is handled by a different call to |
156 | command_line_handler, and normally there is no state retained | |
371d5dec | 157 | between different calls. */ |
b5a0ac70 SS |
158 | int more_to_come = 0; |
159 | ||
160 | struct readline_input_state | |
161 | { | |
162 | char *linebuffer; | |
163 | char *linebuffer_ptr; | |
164 | } | |
165 | readline_input_state; | |
467d8519 TT |
166 | |
167 | /* This hook is called by rl_callback_read_char_wrapper after each | |
168 | character is processed. */ | |
b08ee6a2 | 169 | void (*after_char_processing_hook) (void); |
b5a0ac70 SS |
170 | \f |
171 | ||
371d5dec MS |
172 | /* Wrapper function for calling into the readline library. The event |
173 | loop expects the callback function to have a paramter, while | |
174 | readline expects none. */ | |
c2c6d25f JM |
175 | static void |
176 | rl_callback_read_char_wrapper (gdb_client_data client_data) | |
177 | { | |
178 | rl_callback_read_char (); | |
467d8519 TT |
179 | if (after_char_processing_hook) |
180 | (*after_char_processing_hook) (); | |
c2c6d25f JM |
181 | } |
182 | ||
b5a0ac70 | 183 | /* Initialize all the necessary variables, start the event loop, |
371d5dec | 184 | register readline, and stdin, start the loop. */ |
b5a0ac70 | 185 | void |
c2c6d25f | 186 | cli_command_loop (void) |
b5a0ac70 | 187 | { |
0f71a2f6 | 188 | /* If we are using readline, set things up and display the first |
371d5dec | 189 | prompt, otherwise just print the prompt. */ |
0f71a2f6 JM |
190 | if (async_command_editing_p) |
191 | { | |
2ed23f5f MS |
192 | int length; |
193 | char *a_prompt; | |
95298e72 | 194 | char *gdb_prompt = get_prompt (0); |
2ed23f5f | 195 | |
371d5dec MS |
196 | /* Tell readline what the prompt to display is and what function |
197 | it will need to call after a whole line is read. This also | |
198 | displays the first prompt. */ | |
95298e72 PM |
199 | length = strlen (get_prefix (0)) |
200 | + strlen (gdb_prompt) + strlen (get_suffix(0)) + 1; | |
2ed23f5f | 201 | a_prompt = (char *) alloca (length); |
95298e72 | 202 | strcpy (a_prompt, get_prefix (0)); |
9e0b60a8 | 203 | strcat (a_prompt, gdb_prompt); |
95298e72 | 204 | strcat (a_prompt, get_suffix (0)); |
0f71a2f6 JM |
205 | rl_callback_handler_install (a_prompt, input_handler); |
206 | } | |
207 | else | |
208 | display_gdb_prompt (0); | |
b5a0ac70 | 209 | |
371d5dec | 210 | /* Now it's time to start the event loop. */ |
085dd6e6 | 211 | start_event_loop (); |
b5a0ac70 SS |
212 | } |
213 | ||
214 | /* Change the function to be invoked every time there is a character | |
371d5dec | 215 | ready on stdin. This is used when the user sets the editing off, |
b5a0ac70 | 216 | therefore bypassing readline, and letting gdb handle the input |
371d5dec | 217 | itself, via gdb_readline2. Also it is used in the opposite case in |
b5a0ac70 | 218 | which the user sets editing on again, by restoring readline |
371d5dec | 219 | handling of the input. */ |
392a587b | 220 | static void |
c2c6d25f | 221 | change_line_handler (void) |
b5a0ac70 | 222 | { |
371d5dec MS |
223 | /* NOTE: this operates on input_fd, not instream. If we are reading |
224 | commands from a file, instream will point to the file. However in | |
c2c6d25f | 225 | async mode, we always read commands from a file with editing |
371d5dec MS |
226 | off. This means that the 'set editing on/off' will have effect |
227 | only on the interactive session. */ | |
c2c6d25f | 228 | |
b5a0ac70 SS |
229 | if (async_command_editing_p) |
230 | { | |
371d5dec | 231 | /* Turn on editing by using readline. */ |
c2c6d25f | 232 | call_readline = rl_callback_read_char_wrapper; |
0f71a2f6 | 233 | input_handler = command_line_handler; |
b5a0ac70 SS |
234 | } |
235 | else | |
236 | { | |
371d5dec | 237 | /* Turn off editing by using gdb_readline2. */ |
b5a0ac70 SS |
238 | rl_callback_handler_remove (); |
239 | call_readline = gdb_readline2; | |
0f71a2f6 JM |
240 | |
241 | /* Set up the command handler as well, in case we are called as | |
371d5dec | 242 | first thing from .gdbinit. */ |
0f71a2f6 | 243 | input_handler = command_line_handler; |
b5a0ac70 | 244 | } |
b5a0ac70 SS |
245 | } |
246 | ||
247 | /* Displays the prompt. The prompt that is displayed is the current | |
248 | top of the prompt stack, if the argument NEW_PROMPT is | |
371d5dec | 249 | 0. Otherwise, it displays whatever NEW_PROMPT is. This is used |
b5a0ac70 | 250 | after each gdb command has completed, and in the following cases: |
371d5dec | 251 | 1. When the user enters a command line which is ended by '\' |
0f71a2f6 | 252 | indicating that the command will continue on the next line. |
b5a0ac70 | 253 | In that case the prompt that is displayed is the empty string. |
0f71a2f6 | 254 | 2. When the user is entering 'commands' for a breakpoint, or |
371d5dec | 255 | actions for a tracepoint. In this case the prompt will be '>' |
0f71a2f6 | 256 | 3. Other???? |
371d5dec | 257 | FIXME: 2. & 3. not implemented yet for async. */ |
b5a0ac70 | 258 | void |
c2c6d25f | 259 | display_gdb_prompt (char *new_prompt) |
b5a0ac70 SS |
260 | { |
261 | int prompt_length = 0; | |
d17b6f81 | 262 | char *actual_gdb_prompt = NULL; |
b5a0ac70 | 263 | |
16026cd7 AS |
264 | /* Reset the nesting depth used when trace-commands is set. */ |
265 | reset_command_nest_depth (); | |
266 | ||
4389a95a AC |
267 | /* Each interpreter has its own rules on displaying the command |
268 | prompt. */ | |
269 | if (!current_interp_display_prompt_p ()) | |
fb40c209 | 270 | return; |
fb40c209 | 271 | |
d17b6f81 PM |
272 | /* Get the prompt before the observers are called as observer hook |
273 | functions may change the prompt. Do not call observers on an | |
274 | explicit prompt change as passed to this function, as this forms | |
275 | a temporary prompt, IE, displayed but not set. */ | |
276 | if (! new_prompt) | |
277 | { | |
278 | char *post_gdb_prompt = NULL; | |
95298e72 | 279 | char *pre_gdb_prompt = xstrdup (get_prompt (0)); |
d17b6f81 PM |
280 | |
281 | observer_notify_before_prompt (pre_gdb_prompt); | |
95298e72 | 282 | post_gdb_prompt = get_prompt (0); |
d17b6f81 PM |
283 | |
284 | /* If the observer changed the prompt, use that prompt. */ | |
285 | if (strcmp (pre_gdb_prompt, post_gdb_prompt) != 0) | |
286 | actual_gdb_prompt = post_gdb_prompt; | |
287 | ||
288 | xfree (pre_gdb_prompt); | |
289 | } | |
290 | ||
8ea051c5 | 291 | if (sync_execution && is_running (inferior_ptid)) |
adf40b2e JM |
292 | { |
293 | /* This is to trick readline into not trying to display the | |
6426a772 JM |
294 | prompt. Even though we display the prompt using this |
295 | function, readline still tries to do its own display if we | |
296 | don't call rl_callback_handler_install and | |
297 | rl_callback_handler_remove (which readline detects because a | |
371d5dec | 298 | global variable is not set). If readline did that, it could |
6426a772 JM |
299 | mess up gdb signal handlers for SIGINT. Readline assumes |
300 | that between calls to rl_set_signals and rl_clear_signals gdb | |
371d5dec | 301 | doesn't do anything with the signal handlers. Well, that's |
6426a772 | 302 | not the case, because when the target executes we change the |
371d5dec | 303 | SIGINT signal handler. If we allowed readline to display the |
6426a772 JM |
304 | prompt, the signal handler change would happen exactly |
305 | between the calls to the above two functions. | |
371d5dec | 306 | Calling rl_callback_handler_remove(), does the job. */ |
adf40b2e JM |
307 | |
308 | rl_callback_handler_remove (); | |
309 | return; | |
310 | } | |
311 | ||
d17b6f81 PM |
312 | /* If the observer changed the prompt, ACTUAL_GDB_PROMPT will not be |
313 | NULL. Otherwise, either copy the existing prompt, or set it to | |
314 | NEW_PROMPT. */ | |
315 | if (! actual_gdb_prompt) | |
b5a0ac70 | 316 | { |
d17b6f81 PM |
317 | if (! new_prompt) |
318 | { | |
319 | /* Just use the top of the prompt stack. */ | |
95298e72 PM |
320 | prompt_length = strlen (get_prefix (0)) + |
321 | strlen (get_suffix (0)) + | |
322 | strlen (get_prompt (0)) + 1; | |
d17b6f81 PM |
323 | |
324 | actual_gdb_prompt = (char *) alloca (prompt_length); | |
325 | ||
326 | /* Prefix needs to have new line at end. */ | |
95298e72 PM |
327 | strcpy (actual_gdb_prompt, get_prefix (0)); |
328 | strcat (actual_gdb_prompt, get_prompt (0)); | |
d17b6f81 PM |
329 | /* Suffix needs to have a new line at end and \032 \032 at |
330 | beginning. */ | |
95298e72 | 331 | strcat (actual_gdb_prompt, get_suffix (0)); |
d17b6f81 PM |
332 | } |
333 | else | |
334 | actual_gdb_prompt = new_prompt;; | |
b5a0ac70 SS |
335 | } |
336 | ||
337 | if (async_command_editing_p) | |
338 | { | |
339 | rl_callback_handler_remove (); | |
d17b6f81 | 340 | rl_callback_handler_install (actual_gdb_prompt, input_handler); |
b5a0ac70 | 341 | } |
371d5dec | 342 | /* new_prompt at this point can be the top of the stack or the one |
d014929c MS |
343 | passed in. It can't be NULL. */ |
344 | else | |
b5a0ac70 SS |
345 | { |
346 | /* Don't use a _filtered function here. It causes the assumed | |
347 | character position to be off, since the newline we read from | |
348 | the user is not accounted for. */ | |
d17b6f81 | 349 | fputs_unfiltered (actual_gdb_prompt, gdb_stdout); |
b5a0ac70 SS |
350 | gdb_flush (gdb_stdout); |
351 | } | |
352 | } | |
353 | ||
354 | /* Used when the user requests a different annotation level, with | |
371d5dec | 355 | 'set annotate'. It pushes a new prompt (with prefix and suffix) on top |
b5a0ac70 SS |
356 | of the prompt stack, if the annotation level desired is 2, otherwise |
357 | it pops the top of the prompt stack when we want the annotation level | |
371d5dec | 358 | to be the normal ones (1 or 0). */ |
392a587b | 359 | static void |
c2c6d25f | 360 | change_annotation_level (void) |
b5a0ac70 SS |
361 | { |
362 | char *prefix, *suffix; | |
363 | ||
95298e72 | 364 | if (!get_prefix (0) || !get_prompt (0) || !get_suffix (0)) |
b5a0ac70 SS |
365 | { |
366 | /* The prompt stack has not been initialized to "", we are | |
371d5dec | 367 | using gdb w/o the --async switch. */ |
8a3fe4f8 | 368 | warning (_("Command has same effect as set annotate")); |
b5a0ac70 SS |
369 | return; |
370 | } | |
371 | ||
372 | if (annotation_level > 1) | |
373 | { | |
95298e72 | 374 | if (!strcmp (get_prefix (0), "") && !strcmp (get_suffix (0), "")) |
b5a0ac70 | 375 | { |
371d5dec | 376 | /* Push a new prompt if the previous annotation_level was not >1. */ |
b5a0ac70 SS |
377 | prefix = (char *) alloca (strlen (async_annotation_suffix) + 10); |
378 | strcpy (prefix, "\n\032\032pre-"); | |
379 | strcat (prefix, async_annotation_suffix); | |
380 | strcat (prefix, "\n"); | |
381 | ||
382 | suffix = (char *) alloca (strlen (async_annotation_suffix) + 6); | |
383 | strcpy (suffix, "\n\032\032"); | |
384 | strcat (suffix, async_annotation_suffix); | |
385 | strcat (suffix, "\n"); | |
386 | ||
387 | push_prompt (prefix, (char *) 0, suffix); | |
388 | } | |
389 | } | |
390 | else | |
391 | { | |
95298e72 | 392 | if (strcmp (get_prefix (0), "") && strcmp (get_suffix (0), "")) |
b5a0ac70 | 393 | { |
371d5dec | 394 | /* Pop the top of the stack, we are going back to annotation < 1. */ |
b5a0ac70 SS |
395 | pop_prompt (); |
396 | } | |
397 | } | |
398 | } | |
399 | ||
371d5dec MS |
400 | /* Pushes a new prompt on the prompt stack. Each prompt has three |
401 | parts: prefix, prompt, suffix. Usually prefix and suffix are empty | |
402 | strings, except when the annotation level is 2. Memory is allocated | |
403 | within xstrdup for the new prompt. */ | |
43ff13b4 | 404 | void |
c2c6d25f | 405 | push_prompt (char *prefix, char *prompt, char *suffix) |
b5a0ac70 SS |
406 | { |
407 | the_prompts.top++; | |
95298e72 | 408 | set_prefix (prefix, 0); |
b5a0ac70 | 409 | |
43ff13b4 | 410 | /* Note that this function is used by the set annotate 2 |
371d5dec MS |
411 | command. This is why we take care of saving the old prompt |
412 | in case a new one is not specified. */ | |
b5a0ac70 | 413 | if (prompt) |
95298e72 | 414 | set_prompt (prompt, 0); |
b5a0ac70 | 415 | else |
95298e72 | 416 | set_prompt (get_prompt (-1), 0); |
b5a0ac70 | 417 | |
95298e72 | 418 | set_suffix (suffix, 0); |
b5a0ac70 SS |
419 | } |
420 | ||
371d5dec MS |
421 | /* Pops the top of the prompt stack, and frees the memory allocated |
422 | for it. */ | |
43ff13b4 | 423 | void |
c2c6d25f | 424 | pop_prompt (void) |
b5a0ac70 | 425 | { |
43ff13b4 | 426 | /* If we are not during a 'synchronous' execution command, in which |
371d5dec | 427 | case, the top prompt would be empty. */ |
95298e72 | 428 | if (strcmp (get_prompt (0), "")) |
43ff13b4 | 429 | /* This is for the case in which the prompt is set while the |
371d5dec | 430 | annotation level is 2. The top prompt will be changed, but when |
43ff13b4 | 431 | we return to annotation level < 2, we want that new prompt to be |
371d5dec | 432 | in effect, until the user does another 'set prompt'. */ |
95298e72 PM |
433 | if (strcmp (get_prompt (0), get_prompt (-1))) |
434 | set_prompt (get_prompt (0), -1); | |
435 | ||
436 | set_prefix (NULL, 0); | |
437 | set_prompt (NULL, 0); | |
438 | set_suffix (NULL, 0); | |
b5a0ac70 SS |
439 | the_prompts.top--; |
440 | } | |
c2c6d25f JM |
441 | |
442 | /* When there is an event ready on the stdin file desriptor, instead | |
443 | of calling readline directly throught the callback function, or | |
444 | instead of calling gdb_readline2, give gdb a chance to detect | |
371d5dec | 445 | errors and do something. */ |
c2c6d25f | 446 | void |
2acceee2 | 447 | stdin_event_handler (int error, gdb_client_data client_data) |
c2c6d25f JM |
448 | { |
449 | if (error) | |
450 | { | |
a3f17187 | 451 | printf_unfiltered (_("error detected on stdin\n")); |
2acceee2 | 452 | delete_file_handler (input_fd); |
c2c6d25f | 453 | discard_all_continuations (); |
604ead4a | 454 | discard_all_intermediate_continuations (); |
371d5dec | 455 | /* If stdin died, we may as well kill gdb. */ |
c5394b80 | 456 | quit_command ((char *) 0, stdin == instream); |
c2c6d25f JM |
457 | } |
458 | else | |
6426a772 | 459 | (*call_readline) (client_data); |
c2c6d25f JM |
460 | } |
461 | ||
6426a772 JM |
462 | /* Re-enable stdin after the end of an execution command in |
463 | synchronous mode, or after an error from the target, and we aborted | |
371d5dec | 464 | the exec operation. */ |
6426a772 JM |
465 | |
466 | void | |
712af3be | 467 | async_enable_stdin (void) |
6426a772 | 468 | { |
32c1e744 VP |
469 | if (sync_execution) |
470 | { | |
371d5dec | 471 | /* See NOTE in async_disable_stdin(). */ |
32c1e744 VP |
472 | /* FIXME: cagney/1999-09-27: Call this before clearing |
473 | sync_execution. Current target_terminal_ours() implementations | |
371d5dec | 474 | check for sync_execution before switching the terminal. */ |
32c1e744 VP |
475 | target_terminal_ours (); |
476 | pop_prompt (); | |
477 | sync_execution = 0; | |
478 | } | |
6426a772 JM |
479 | } |
480 | ||
481 | /* Disable reads from stdin (the console) marking the command as | |
371d5dec | 482 | synchronous. */ |
6426a772 JM |
483 | |
484 | void | |
485 | async_disable_stdin (void) | |
486 | { | |
d9d2d8b6 PA |
487 | if (!sync_execution) |
488 | { | |
489 | sync_execution = 1; | |
490 | push_prompt ("", "", ""); | |
491 | } | |
6426a772 | 492 | } |
b5a0ac70 | 493 | \f |
6426a772 | 494 | |
371d5dec | 495 | /* Handles a gdb command. This function is called by |
b5a0ac70 | 496 | command_line_handler, which has processed one or more input lines |
371d5dec | 497 | into COMMAND. */ |
392a587b | 498 | /* NOTE: 1999-04-30 This is the asynchronous version of the command_loop |
b5a0ac70 | 499 | function. The command_loop function will be obsolete when we |
371d5dec | 500 | switch to use the event loop at every execution of gdb. */ |
392a587b | 501 | static void |
c2c6d25f | 502 | command_handler (char *command) |
b5a0ac70 | 503 | { |
b5a0ac70 | 504 | int stdin_is_tty = ISATTY (stdin); |
0f3bb72e | 505 | struct cleanup *stat_chain; |
b5a0ac70 | 506 | |
b5a0ac70 SS |
507 | quit_flag = 0; |
508 | if (instream == stdin && stdin_is_tty) | |
509 | reinitialize_more_filter (); | |
b5a0ac70 | 510 | |
371d5dec MS |
511 | /* If readline returned a NULL command, it means that the connection |
512 | with the terminal is gone. This happens at the end of a | |
513 | testsuite run, after Expect has hung up but GDB is still alive. | |
514 | In such a case, we just quit gdb killing the inferior program | |
515 | too. */ | |
b5a0ac70 | 516 | if (command == 0) |
fa3fd85b AS |
517 | { |
518 | printf_unfiltered ("quit\n"); | |
519 | execute_command ("quit", stdin == instream); | |
520 | } | |
b5a0ac70 | 521 | |
0f3bb72e | 522 | stat_chain = make_command_stats_cleanup (1); |
b5a0ac70 SS |
523 | |
524 | execute_command (command, instream == stdin); | |
c5aa993b | 525 | |
347bddb7 PA |
526 | /* Do any commands attached to breakpoint we stopped at. */ |
527 | bpstat_do_actions (); | |
c5aa993b | 528 | |
0f3bb72e | 529 | do_cleanups (stat_chain); |
43ff13b4 JM |
530 | } |
531 | ||
371d5dec MS |
532 | /* Handle a complete line of input. This is called by the callback |
533 | mechanism within the readline library. Deal with incomplete | |
534 | commands as well, by saving the partial input in a global | |
535 | buffer. */ | |
b5a0ac70 | 536 | |
392a587b | 537 | /* NOTE: 1999-04-30 This is the asynchronous version of the |
371d5dec | 538 | command_line_input function; command_line_input will become |
b5a0ac70 | 539 | obsolete once we use the event loop as the default mechanism in |
371d5dec | 540 | GDB. */ |
b5a0ac70 | 541 | static void |
c2c6d25f | 542 | command_line_handler (char *rl) |
b5a0ac70 SS |
543 | { |
544 | static char *linebuffer = 0; | |
545 | static unsigned linelength = 0; | |
52f0bd74 | 546 | char *p; |
b5a0ac70 | 547 | char *p1; |
b5a0ac70 SS |
548 | char *nline; |
549 | char got_eof = 0; | |
550 | ||
b5a0ac70 SS |
551 | int repeat = (instream == stdin); |
552 | ||
553 | if (annotation_level > 1 && instream == stdin) | |
554 | { | |
a3f17187 | 555 | printf_unfiltered (("\n\032\032post-")); |
306d9ac5 | 556 | puts_unfiltered (async_annotation_suffix); |
a3f17187 | 557 | printf_unfiltered (("\n")); |
b5a0ac70 SS |
558 | } |
559 | ||
560 | if (linebuffer == 0) | |
561 | { | |
562 | linelength = 80; | |
563 | linebuffer = (char *) xmalloc (linelength); | |
564 | } | |
565 | ||
566 | p = linebuffer; | |
567 | ||
568 | if (more_to_come) | |
569 | { | |
570 | strcpy (linebuffer, readline_input_state.linebuffer); | |
571 | p = readline_input_state.linebuffer_ptr; | |
b8c9b27d | 572 | xfree (readline_input_state.linebuffer); |
b5a0ac70 | 573 | more_to_come = 0; |
adf40b2e | 574 | pop_prompt (); |
b5a0ac70 SS |
575 | } |
576 | ||
577 | #ifdef STOP_SIGNAL | |
578 | if (job_control) | |
0f71a2f6 | 579 | signal (STOP_SIGNAL, handle_stop_sig); |
b5a0ac70 SS |
580 | #endif |
581 | ||
582 | /* Make sure that all output has been output. Some machines may let | |
371d5dec MS |
583 | you get away with leaving out some of the gdb_flush, but not |
584 | all. */ | |
b5a0ac70 SS |
585 | wrap_here (""); |
586 | gdb_flush (gdb_stdout); | |
587 | gdb_flush (gdb_stderr); | |
588 | ||
589 | if (source_file_name != NULL) | |
637537d0 | 590 | ++source_line_number; |
b5a0ac70 SS |
591 | |
592 | /* If we are in this case, then command_handler will call quit | |
371d5dec | 593 | and exit from gdb. */ |
b5a0ac70 SS |
594 | if (!rl || rl == (char *) EOF) |
595 | { | |
596 | got_eof = 1; | |
597 | command_handler (0); | |
371d5dec | 598 | return; /* Lint. */ |
b5a0ac70 SS |
599 | } |
600 | if (strlen (rl) + 1 + (p - linebuffer) > linelength) | |
601 | { | |
602 | linelength = strlen (rl) + 1 + (p - linebuffer); | |
603 | nline = (char *) xrealloc (linebuffer, linelength); | |
604 | p += nline - linebuffer; | |
605 | linebuffer = nline; | |
606 | } | |
607 | p1 = rl; | |
608 | /* Copy line. Don't copy null at end. (Leaves line alone | |
371d5dec | 609 | if this was just a newline). */ |
b5a0ac70 SS |
610 | while (*p1) |
611 | *p++ = *p1++; | |
612 | ||
b8c9b27d | 613 | xfree (rl); /* Allocated in readline. */ |
b5a0ac70 | 614 | |
4dd79c29 | 615 | if (p > linebuffer && *(p - 1) == '\\') |
b5a0ac70 | 616 | { |
20bb6bc8 | 617 | *p = '\0'; |
b5a0ac70 SS |
618 | p--; /* Put on top of '\'. */ |
619 | ||
1b36a34b | 620 | readline_input_state.linebuffer = xstrdup (linebuffer); |
d96429cd AS |
621 | readline_input_state.linebuffer_ptr = p; |
622 | ||
623 | /* We will not invoke a execute_command if there is more | |
371d5dec MS |
624 | input expected to complete the command. So, we need to |
625 | print an empty prompt here. */ | |
d96429cd AS |
626 | more_to_come = 1; |
627 | push_prompt ("", "", ""); | |
628 | display_gdb_prompt (0); | |
629 | return; | |
b5a0ac70 SS |
630 | } |
631 | ||
632 | #ifdef STOP_SIGNAL | |
633 | if (job_control) | |
634 | signal (STOP_SIGNAL, SIG_DFL); | |
635 | #endif | |
636 | ||
637 | #define SERVER_COMMAND_LENGTH 7 | |
638 | server_command = | |
639 | (p - linebuffer > SERVER_COMMAND_LENGTH) | |
bf896cb0 | 640 | && strncmp (linebuffer, "server ", SERVER_COMMAND_LENGTH) == 0; |
b5a0ac70 SS |
641 | if (server_command) |
642 | { | |
643 | /* Note that we don't set `line'. Between this and the check in | |
644 | dont_repeat, this insures that repeating will still do the | |
645 | right thing. */ | |
646 | *p = '\0'; | |
647 | command_handler (linebuffer + SERVER_COMMAND_LENGTH); | |
648 | display_gdb_prompt (0); | |
649 | return; | |
650 | } | |
651 | ||
652 | /* Do history expansion if that is wished. */ | |
653 | if (history_expansion_p && instream == stdin | |
654 | && ISATTY (instream)) | |
655 | { | |
656 | char *history_value; | |
657 | int expanded; | |
658 | ||
659 | *p = '\0'; /* Insert null now. */ | |
660 | expanded = history_expand (linebuffer, &history_value); | |
661 | if (expanded) | |
662 | { | |
663 | /* Print the changes. */ | |
664 | printf_unfiltered ("%s\n", history_value); | |
665 | ||
666 | /* If there was an error, call this function again. */ | |
667 | if (expanded < 0) | |
668 | { | |
b8c9b27d | 669 | xfree (history_value); |
b5a0ac70 SS |
670 | return; |
671 | } | |
672 | if (strlen (history_value) > linelength) | |
673 | { | |
674 | linelength = strlen (history_value) + 1; | |
675 | linebuffer = (char *) xrealloc (linebuffer, linelength); | |
676 | } | |
677 | strcpy (linebuffer, history_value); | |
678 | p = linebuffer + strlen (linebuffer); | |
b5a0ac70 | 679 | } |
f5b73fbb | 680 | xfree (history_value); |
b5a0ac70 SS |
681 | } |
682 | ||
371d5dec MS |
683 | /* If we just got an empty line, and that is supposed to repeat the |
684 | previous command, return the value in the global buffer. */ | |
b5a0ac70 SS |
685 | if (repeat && p == linebuffer && *p != '\\') |
686 | { | |
dc7eb48e | 687 | command_handler (saved_command_line); |
b5a0ac70 SS |
688 | display_gdb_prompt (0); |
689 | return; | |
690 | } | |
691 | ||
692 | for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++); | |
693 | if (repeat && !*p1) | |
694 | { | |
dc7eb48e | 695 | command_handler (saved_command_line); |
b5a0ac70 SS |
696 | display_gdb_prompt (0); |
697 | return; | |
698 | } | |
699 | ||
700 | *p = 0; | |
701 | ||
702 | /* Add line to history if appropriate. */ | |
703 | if (instream == stdin | |
704 | && ISATTY (stdin) && *linebuffer) | |
705 | add_history (linebuffer); | |
706 | ||
707 | /* Note: lines consisting solely of comments are added to the command | |
708 | history. This is useful when you type a command, and then | |
709 | realize you don't want to execute it quite yet. You can comment | |
710 | out the command and then later fetch it from the value history | |
711 | and remove the '#'. The kill ring is probably better, but some | |
712 | people are in the habit of commenting things out. */ | |
713 | if (*p1 == '#') | |
371d5dec | 714 | *p1 = '\0'; /* Found a comment. */ |
b5a0ac70 SS |
715 | |
716 | /* Save into global buffer if appropriate. */ | |
717 | if (repeat) | |
718 | { | |
dc7eb48e | 719 | if (linelength > saved_command_line_size) |
b5a0ac70 | 720 | { |
dc7eb48e PA |
721 | saved_command_line = xrealloc (saved_command_line, linelength); |
722 | saved_command_line_size = linelength; | |
b5a0ac70 | 723 | } |
dc7eb48e | 724 | strcpy (saved_command_line, linebuffer); |
b5a0ac70 SS |
725 | if (!more_to_come) |
726 | { | |
dc7eb48e | 727 | command_handler (saved_command_line); |
b5a0ac70 SS |
728 | display_gdb_prompt (0); |
729 | } | |
730 | return; | |
731 | } | |
732 | ||
733 | command_handler (linebuffer); | |
734 | display_gdb_prompt (0); | |
735 | return; | |
736 | } | |
737 | ||
738 | /* Does reading of input from terminal w/o the editing features | |
371d5dec | 739 | provided by the readline library. */ |
b5a0ac70 | 740 | |
371d5dec | 741 | /* NOTE: 1999-04-30 Asynchronous version of gdb_readline; gdb_readline |
b5a0ac70 | 742 | will become obsolete when the event loop is made the default |
371d5dec | 743 | execution for gdb. */ |
085dd6e6 | 744 | void |
c2c6d25f | 745 | gdb_readline2 (gdb_client_data client_data) |
b5a0ac70 SS |
746 | { |
747 | int c; | |
748 | char *result; | |
749 | int input_index = 0; | |
750 | int result_size = 80; | |
7be570e7 JM |
751 | static int done_once = 0; |
752 | ||
753 | /* Unbuffer the input stream, so that, later on, the calls to fgetc | |
371d5dec | 754 | fetch only one char at the time from the stream. The fgetc's will |
7be570e7 | 755 | get up to the first newline, but there may be more chars in the |
371d5dec | 756 | stream after '\n'. If we buffer the input and fgetc drains the |
7be570e7 | 757 | stream, getting stuff beyond the newline as well, a select, done |
371d5dec | 758 | afterwards will not trigger. */ |
7be570e7 JM |
759 | if (!done_once && !ISATTY (instream)) |
760 | { | |
761 | setbuf (instream, NULL); | |
762 | done_once = 1; | |
763 | } | |
b5a0ac70 SS |
764 | |
765 | result = (char *) xmalloc (result_size); | |
766 | ||
767 | /* We still need the while loop here, even though it would seem | |
768 | obvious to invoke gdb_readline2 at every character entered. If | |
769 | not using the readline library, the terminal is in cooked mode, | |
371d5dec MS |
770 | which sends the characters all at once. Poll will notice that the |
771 | input fd has changed state only after enter is pressed. At this | |
772 | point we still need to fetch all the chars entered. */ | |
b5a0ac70 SS |
773 | |
774 | while (1) | |
775 | { | |
776 | /* Read from stdin if we are executing a user defined command. | |
777 | This is the right thing for prompt_for_continue, at least. */ | |
778 | c = fgetc (instream ? instream : stdin); | |
779 | ||
780 | if (c == EOF) | |
781 | { | |
782 | if (input_index > 0) | |
371d5dec MS |
783 | /* The last line does not end with a newline. Return it, |
784 | and if we are called again fgetc will still return EOF | |
785 | and we'll return NULL then. */ | |
b5a0ac70 | 786 | break; |
b8c9b27d | 787 | xfree (result); |
0f71a2f6 | 788 | (*input_handler) (0); |
13ce7133 | 789 | return; |
b5a0ac70 SS |
790 | } |
791 | ||
792 | if (c == '\n') | |
b5a0ac70 SS |
793 | { |
794 | if (input_index > 0 && result[input_index - 1] == '\r') | |
795 | input_index--; | |
796 | break; | |
797 | } | |
b5a0ac70 SS |
798 | |
799 | result[input_index++] = c; | |
800 | while (input_index >= result_size) | |
801 | { | |
802 | result_size *= 2; | |
803 | result = (char *) xrealloc (result, result_size); | |
804 | } | |
805 | } | |
806 | ||
807 | result[input_index++] = '\0'; | |
0f71a2f6 | 808 | (*input_handler) (result); |
b5a0ac70 SS |
809 | } |
810 | \f | |
811 | ||
812 | /* Initialization of signal handlers and tokens. There is a function | |
371d5dec | 813 | handle_sig* for each of the signals GDB cares about. Specifically: |
b5a0ac70 SS |
814 | SIGINT, SIGFPE, SIGQUIT, SIGTSTP, SIGHUP, SIGWINCH. These |
815 | functions are the actual signal handlers associated to the signals | |
816 | via calls to signal(). The only job for these functions is to | |
817 | enqueue the appropriate event/procedure with the event loop. Such | |
371d5dec | 818 | procedures are the old signal handlers. The event loop will take |
b5a0ac70 | 819 | care of invoking the queued procedures to perform the usual tasks |
371d5dec | 820 | associated with the reception of the signal. */ |
392a587b | 821 | /* NOTE: 1999-04-30 This is the asynchronous version of init_signals. |
b5a0ac70 | 822 | init_signals will become obsolete as we move to have to event loop |
371d5dec | 823 | as the default for gdb. */ |
b5a0ac70 | 824 | void |
c2c6d25f | 825 | async_init_signals (void) |
c5aa993b | 826 | { |
b5a0ac70 SS |
827 | signal (SIGINT, handle_sigint); |
828 | sigint_token = | |
0f71a2f6 | 829 | create_async_signal_handler (async_request_quit, NULL); |
a7266fef | 830 | signal (SIGTERM, handle_sigterm); |
b5a0ac70 SS |
831 | |
832 | /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed | |
833 | to the inferior and breakpoints will be ignored. */ | |
834 | #ifdef SIGTRAP | |
835 | signal (SIGTRAP, SIG_DFL); | |
836 | #endif | |
837 | ||
6d318c73 | 838 | #ifdef SIGQUIT |
b5a0ac70 SS |
839 | /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get |
840 | passed to the inferior, which we don't want. It would be | |
841 | possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but | |
842 | on BSD4.3 systems using vfork, that can affect the | |
843 | GDB process as well as the inferior (the signal handling tables | |
844 | might be in memory, shared between the two). Since we establish | |
845 | a handler for SIGQUIT, when we call exec it will set the signal | |
846 | to SIG_DFL for us. */ | |
847 | signal (SIGQUIT, handle_sigquit); | |
848 | sigquit_token = | |
0f71a2f6 | 849 | create_async_signal_handler (async_do_nothing, NULL); |
6d318c73 | 850 | #endif |
b5a0ac70 SS |
851 | #ifdef SIGHUP |
852 | if (signal (SIGHUP, handle_sighup) != SIG_IGN) | |
853 | sighup_token = | |
0f71a2f6 | 854 | create_async_signal_handler (async_disconnect, NULL); |
b5a0ac70 SS |
855 | else |
856 | sighup_token = | |
0f71a2f6 | 857 | create_async_signal_handler (async_do_nothing, NULL); |
b5a0ac70 SS |
858 | #endif |
859 | signal (SIGFPE, handle_sigfpe); | |
860 | sigfpe_token = | |
0f71a2f6 | 861 | create_async_signal_handler (async_float_handler, NULL); |
b5a0ac70 SS |
862 | |
863 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) | |
864 | signal (SIGWINCH, handle_sigwinch); | |
865 | sigwinch_token = | |
0f71a2f6 | 866 | create_async_signal_handler (SIGWINCH_HANDLER, NULL); |
b5a0ac70 | 867 | #endif |
0f71a2f6 JM |
868 | #ifdef STOP_SIGNAL |
869 | sigtstp_token = | |
870 | create_async_signal_handler (async_stop_sig, NULL); | |
871 | #endif | |
872 | ||
873 | } | |
874 | ||
c5aa993b | 875 | void |
97bb9d91 | 876 | mark_async_signal_handler_wrapper (void *token) |
0f71a2f6 | 877 | { |
c2c6d25f | 878 | mark_async_signal_handler ((struct async_signal_handler *) token); |
b5a0ac70 SS |
879 | } |
880 | ||
371d5dec MS |
881 | /* Tell the event loop what to do if SIGINT is received. |
882 | See event-signal.c. */ | |
c5aa993b | 883 | void |
c2c6d25f | 884 | handle_sigint (int sig) |
b5a0ac70 SS |
885 | { |
886 | signal (sig, handle_sigint); | |
887 | ||
5f960e00 FF |
888 | /* We could be running in a loop reading in symfiles or something so |
889 | it may be quite a while before we get back to the event loop. So | |
371d5dec | 890 | set quit_flag to 1 here. Then if QUIT is called before we get to |
5f960e00 FF |
891 | the event loop, we will unwind as expected. */ |
892 | ||
893 | quit_flag = 1; | |
894 | ||
b5a0ac70 | 895 | /* If immediate_quit is set, we go ahead and process the SIGINT right |
371d5dec | 896 | away, even if we usually would defer this to the event loop. The |
b5a0ac70 | 897 | assumption here is that it is safe to process ^C immediately if |
371d5dec | 898 | immediate_quit is set. If we didn't, SIGINT would be really |
b5a0ac70 SS |
899 | processed only the next time through the event loop. To get to |
900 | that point, though, the command that we want to interrupt needs to | |
b803fb0f | 901 | finish first, which is unacceptable. If immediate quit is not set, |
371d5dec | 902 | we process SIGINT the next time through the loop, which is fine. */ |
b803fb0f | 903 | gdb_call_async_signal_handler (sigint_token, immediate_quit); |
b5a0ac70 SS |
904 | } |
905 | ||
a7266fef AS |
906 | /* Quit GDB if SIGTERM is received. |
907 | GDB would quit anyway, but this way it will clean up properly. */ | |
908 | void | |
909 | handle_sigterm (int sig) | |
910 | { | |
911 | signal (sig, handle_sigterm); | |
912 | quit_force ((char *) 0, stdin == instream); | |
913 | } | |
914 | ||
371d5dec | 915 | /* Do the quit. All the checks have been done by the caller. */ |
c5aa993b | 916 | void |
c2c6d25f | 917 | async_request_quit (gdb_client_data arg) |
b5a0ac70 | 918 | { |
5f960e00 | 919 | /* If the quit_flag has gotten reset back to 0 by the time we get |
4ac94eda FF |
920 | back here, that means that an exception was thrown to unwind the |
921 | current command before we got back to the event loop. So there | |
922 | is no reason to call quit again here, unless immediate_quit is | |
371d5dec | 923 | set. */ |
5f960e00 | 924 | |
4ac94eda FF |
925 | if (quit_flag || immediate_quit) |
926 | quit (); | |
b5a0ac70 SS |
927 | } |
928 | ||
6d318c73 | 929 | #ifdef SIGQUIT |
371d5dec MS |
930 | /* Tell the event loop what to do if SIGQUIT is received. |
931 | See event-signal.c. */ | |
c5aa993b | 932 | static void |
c2c6d25f | 933 | handle_sigquit (int sig) |
b5a0ac70 | 934 | { |
0f71a2f6 | 935 | mark_async_signal_handler_wrapper (sigquit_token); |
b5a0ac70 SS |
936 | signal (sig, handle_sigquit); |
937 | } | |
6d318c73 | 938 | #endif |
b5a0ac70 | 939 | |
0f0b8dcd DJ |
940 | #if defined (SIGQUIT) || defined (SIGHUP) |
941 | /* Called by the event loop in response to a SIGQUIT or an | |
942 | ignored SIGHUP. */ | |
c5aa993b | 943 | static void |
c2c6d25f | 944 | async_do_nothing (gdb_client_data arg) |
b5a0ac70 | 945 | { |
371d5dec | 946 | /* Empty function body. */ |
b5a0ac70 | 947 | } |
0f0b8dcd | 948 | #endif |
b5a0ac70 SS |
949 | |
950 | #ifdef SIGHUP | |
371d5dec MS |
951 | /* Tell the event loop what to do if SIGHUP is received. |
952 | See event-signal.c. */ | |
c5aa993b | 953 | static void |
fba45db2 | 954 | handle_sighup (int sig) |
b5a0ac70 | 955 | { |
0f71a2f6 | 956 | mark_async_signal_handler_wrapper (sighup_token); |
b5a0ac70 SS |
957 | signal (sig, handle_sighup); |
958 | } | |
959 | ||
371d5dec | 960 | /* Called by the event loop to process a SIGHUP. */ |
c5aa993b | 961 | static void |
c2c6d25f | 962 | async_disconnect (gdb_client_data arg) |
b5a0ac70 SS |
963 | { |
964 | catch_errors (quit_cover, NULL, | |
965 | "Could not kill the program being debugged", | |
966 | RETURN_MASK_ALL); | |
371d5dec | 967 | signal (SIGHUP, SIG_DFL); /*FIXME: ??????????? */ |
ec4dfccf | 968 | raise (SIGHUP); |
b5a0ac70 SS |
969 | } |
970 | #endif | |
971 | ||
0f71a2f6 | 972 | #ifdef STOP_SIGNAL |
c5aa993b | 973 | void |
c2c6d25f | 974 | handle_stop_sig (int sig) |
0f71a2f6 | 975 | { |
c5aa993b JM |
976 | mark_async_signal_handler_wrapper (sigtstp_token); |
977 | signal (sig, handle_stop_sig); | |
0f71a2f6 JM |
978 | } |
979 | ||
980 | static void | |
c2c6d25f | 981 | async_stop_sig (gdb_client_data arg) |
0f71a2f6 | 982 | { |
95298e72 | 983 | char *prompt = get_prompt (0); |
d7f9d729 | 984 | |
0f71a2f6 JM |
985 | #if STOP_SIGNAL == SIGTSTP |
986 | signal (SIGTSTP, SIG_DFL); | |
2acceee2 JM |
987 | #if HAVE_SIGPROCMASK |
988 | { | |
989 | sigset_t zero; | |
46711df8 | 990 | |
2acceee2 JM |
991 | sigemptyset (&zero); |
992 | sigprocmask (SIG_SETMASK, &zero, 0); | |
993 | } | |
46711df8 | 994 | #elif HAVE_SIGSETMASK |
0f71a2f6 | 995 | sigsetmask (0); |
2acceee2 | 996 | #endif |
ec4dfccf | 997 | raise (SIGTSTP); |
0f71a2f6 JM |
998 | signal (SIGTSTP, handle_stop_sig); |
999 | #else | |
1000 | signal (STOP_SIGNAL, handle_stop_sig); | |
1001 | #endif | |
1002 | printf_unfiltered ("%s", prompt); | |
1003 | gdb_flush (gdb_stdout); | |
1004 | ||
371d5dec MS |
1005 | /* Forget about any previous command -- null line now will do |
1006 | nothing. */ | |
0f71a2f6 JM |
1007 | dont_repeat (); |
1008 | } | |
1009 | #endif /* STOP_SIGNAL */ | |
1010 | ||
371d5dec MS |
1011 | /* Tell the event loop what to do if SIGFPE is received. |
1012 | See event-signal.c. */ | |
c5aa993b | 1013 | static void |
c2c6d25f | 1014 | handle_sigfpe (int sig) |
b5a0ac70 | 1015 | { |
0f71a2f6 | 1016 | mark_async_signal_handler_wrapper (sigfpe_token); |
b5a0ac70 SS |
1017 | signal (sig, handle_sigfpe); |
1018 | } | |
1019 | ||
371d5dec | 1020 | /* Event loop will call this functin to process a SIGFPE. */ |
c5aa993b | 1021 | static void |
c2c6d25f | 1022 | async_float_handler (gdb_client_data arg) |
b5a0ac70 | 1023 | { |
371d5dec MS |
1024 | /* This message is based on ANSI C, section 4.7. Note that integer |
1025 | divide by zero causes this, so "float" is a misnomer. */ | |
8a3fe4f8 | 1026 | error (_("Erroneous arithmetic operation.")); |
b5a0ac70 SS |
1027 | } |
1028 | ||
371d5dec MS |
1029 | /* Tell the event loop what to do if SIGWINCH is received. |
1030 | See event-signal.c. */ | |
b5a0ac70 | 1031 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
c5aa993b | 1032 | static void |
c2c6d25f | 1033 | handle_sigwinch (int sig) |
b5a0ac70 | 1034 | { |
0f71a2f6 | 1035 | mark_async_signal_handler_wrapper (sigwinch_token); |
b5a0ac70 SS |
1036 | signal (sig, handle_sigwinch); |
1037 | } | |
1038 | #endif | |
1039 | \f | |
1040 | ||
1041 | /* Called by do_setshow_command. */ | |
b5a0ac70 | 1042 | void |
371d5dec MS |
1043 | set_async_editing_command (char *args, int from_tty, |
1044 | struct cmd_list_element *c) | |
b5a0ac70 SS |
1045 | { |
1046 | change_line_handler (); | |
1047 | } | |
1048 | ||
1049 | /* Called by do_setshow_command. */ | |
b5a0ac70 | 1050 | void |
371d5dec MS |
1051 | set_async_annotation_level (char *args, int from_tty, |
1052 | struct cmd_list_element *c) | |
b5a0ac70 SS |
1053 | { |
1054 | change_annotation_level (); | |
1055 | } | |
1056 | ||
1057 | /* Called by do_setshow_command. */ | |
b5a0ac70 | 1058 | void |
c2c6d25f | 1059 | set_async_prompt (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 | 1060 | { |
95298e72 | 1061 | set_prompt (new_async_prompt, 0); |
b5a0ac70 SS |
1062 | } |
1063 | ||
0f71a2f6 JM |
1064 | /* Set things up for readline to be invoked via the alternate |
1065 | interface, i.e. via a callback function (rl_callback_read_char), | |
371d5dec | 1066 | and hook up instream to the event loop. */ |
0f71a2f6 | 1067 | void |
cee6ddeb | 1068 | gdb_setup_readline (void) |
0f71a2f6 | 1069 | { |
362646f5 AC |
1070 | /* This function is a noop for the sync case. The assumption is |
1071 | that the sync setup is ALL done in gdb_init, and we would only | |
1072 | mess it up here. The sync stuff should really go away over | |
1073 | time. */ | |
1a088d06 AS |
1074 | if (!batch_silent) |
1075 | gdb_stdout = stdio_fileopen (stdout); | |
362646f5 AC |
1076 | gdb_stderr = stdio_fileopen (stderr); |
1077 | gdb_stdlog = gdb_stderr; /* for moment */ | |
1078 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
8d4d924b | 1079 | gdb_stdtargerr = gdb_stderr; /* for moment */ |
362646f5 AC |
1080 | |
1081 | /* If the input stream is connected to a terminal, turn on | |
1082 | editing. */ | |
1083 | if (ISATTY (instream)) | |
9e0b60a8 | 1084 | { |
371d5dec | 1085 | /* Tell gdb that we will be using the readline library. This |
362646f5 AC |
1086 | could be overwritten by a command in .gdbinit like 'set |
1087 | editing on' or 'off'. */ | |
1088 | async_command_editing_p = 1; | |
c5201926 | 1089 | |
362646f5 AC |
1090 | /* When a character is detected on instream by select or poll, |
1091 | readline will be invoked via this callback function. */ | |
1092 | call_readline = rl_callback_read_char_wrapper; | |
9e0b60a8 | 1093 | } |
362646f5 AC |
1094 | else |
1095 | { | |
1096 | async_command_editing_p = 0; | |
1097 | call_readline = gdb_readline2; | |
1098 | } | |
1099 | ||
1100 | /* When readline has read an end-of-line character, it passes the | |
371d5dec | 1101 | complete line to gdb for processing; command_line_handler is the |
362646f5 AC |
1102 | function that does this. */ |
1103 | input_handler = command_line_handler; | |
1104 | ||
371d5dec | 1105 | /* Tell readline to use the same input stream that gdb uses. */ |
362646f5 AC |
1106 | rl_instream = instream; |
1107 | ||
1108 | /* Get a file descriptor for the input stream, so that we can | |
1109 | register it with the event loop. */ | |
1110 | input_fd = fileno (instream); | |
1111 | ||
1112 | /* Now we need to create the event sources for the input file | |
1113 | descriptor. */ | |
1114 | /* At this point in time, this is the only event source that we | |
371d5dec | 1115 | register with the even loop. Another source is going to be the |
362646f5 AC |
1116 | target program (inferior), but that must be registered only when |
1117 | it actually exists (I.e. after we say 'run' or after we connect | |
1118 | to a remote target. */ | |
1119 | add_file_handler (input_fd, stdin_event_handler, 0); | |
0f71a2f6 | 1120 | } |
cee6ddeb | 1121 | |
7d5b6fdd EZ |
1122 | /* Disable command input through the standard CLI channels. Used in |
1123 | the suspend proc for interpreters that use the standard gdb readline | |
1124 | interface, like the cli & the mi. */ | |
1125 | void | |
1126 | gdb_disable_readline (void) | |
1127 | { | |
362646f5 AC |
1128 | /* FIXME - It is too heavyweight to delete and remake these every |
1129 | time you run an interpreter that needs readline. It is probably | |
1130 | better to have the interpreters cache these, which in turn means | |
1131 | that this needs to be moved into interpreter specific code. */ | |
7d5b6fdd EZ |
1132 | |
1133 | #if 0 | |
362646f5 AC |
1134 | ui_file_delete (gdb_stdout); |
1135 | ui_file_delete (gdb_stderr); | |
1136 | gdb_stdlog = NULL; | |
1137 | gdb_stdtarg = NULL; | |
8d4d924b | 1138 | gdb_stdtargerr = NULL; |
7d5b6fdd EZ |
1139 | #endif |
1140 | ||
362646f5 AC |
1141 | rl_callback_handler_remove (); |
1142 | delete_file_handler (input_fd); | |
7d5b6fdd | 1143 | } |