Commit | Line | Data |
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b5a0ac70 | 1 | /* Top level stuff for GDB, the GNU debugger. |
b6ba6518 | 2 | Copyright 1999, 2000, 2001 Free Software Foundation, Inc. |
b5a0ac70 SS |
3 | Written by Elena Zannoni <ezannoni@cygnus.com> of Cygnus Solutions. |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
c5aa993b JM |
19 | Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
b5a0ac70 SS |
21 | |
22 | #include "defs.h" | |
0f71a2f6 | 23 | #include "top.h" |
b5a0ac70 | 24 | #include "inferior.h" |
e514a9d6 | 25 | #include "target.h" |
c5aa993b | 26 | #include "terminal.h" /* for job_control */ |
9e0b60a8 | 27 | #include "event-loop.h" |
c2c6d25f | 28 | #include "event-top.h" |
042be3a9 | 29 | #include <signal.h> |
b5a0ac70 | 30 | |
104c1213 JM |
31 | /* For dont_repeat() */ |
32 | #include "gdbcmd.h" | |
33 | ||
b5a0ac70 SS |
34 | /* readline include files */ |
35 | #include <readline/readline.h> | |
36 | #include <readline/history.h> | |
37 | ||
38 | /* readline defines this. */ | |
39 | #undef savestring | |
40 | ||
c2c6d25f | 41 | extern void _initialize_event_loop (void); |
b5a0ac70 | 42 | |
c2c6d25f JM |
43 | static void rl_callback_read_char_wrapper (gdb_client_data client_data); |
44 | static void command_line_handler (char *rl); | |
45 | static void command_line_handler_continuation (struct continuation_arg *arg); | |
46 | static void change_line_handler (void); | |
47 | static void change_annotation_level (void); | |
48 | static void command_handler (char *command); | |
49 | void cli_command_loop (void); | |
50 | static void async_do_nothing (gdb_client_data arg); | |
51 | static void async_disconnect (gdb_client_data arg); | |
52 | static void async_stop_sig (gdb_client_data arg); | |
53 | static void async_float_handler (gdb_client_data arg); | |
b5a0ac70 SS |
54 | |
55 | /* Signal handlers. */ | |
c2c6d25f JM |
56 | static void handle_sigquit (int sig); |
57 | static void handle_sighup (int sig); | |
58 | static void handle_sigfpe (int sig); | |
d4f3574e | 59 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
c2c6d25f | 60 | static void handle_sigwinch (int sig); |
0f71a2f6 | 61 | #endif |
b5a0ac70 SS |
62 | |
63 | /* Functions to be invoked by the event loop in response to | |
64 | signals. */ | |
c2c6d25f JM |
65 | static void async_do_nothing (gdb_client_data); |
66 | static void async_disconnect (gdb_client_data); | |
67 | static void async_float_handler (gdb_client_data); | |
68 | static void async_stop_sig (gdb_client_data); | |
b5a0ac70 | 69 | |
b5a0ac70 SS |
70 | /* Readline offers an alternate interface, via callback |
71 | functions. These are all included in the file callback.c in the | |
72 | readline distribution. This file provides (mainly) a function, which | |
73 | the event loop uses as callback (i.e. event handler) whenever an event | |
74 | is detected on the standard input file descriptor. | |
75 | readline_callback_read_char is called (by the GDB event loop) whenever | |
76 | there is a new character ready on the input stream. This function | |
77 | incrementally builds a buffer internal to readline where it | |
78 | accumulates the line read up to the point of invocation. In the | |
79 | special case in which the character read is newline, the function | |
80 | invokes a GDB supplied callback routine, which does the processing of | |
81 | a full command line. This latter routine is the asynchronous analog | |
82 | of the old command_line_input in gdb. Instead of invoking (and waiting | |
83 | for) readline to read the command line and pass it back to | |
84 | command_loop for processing, the new command_line_handler function has | |
85 | the command line already available as its parameter. INPUT_HANDLER is | |
86 | to be set to the function that readline will invoke when a complete | |
87 | line of input is ready. CALL_READLINE is to be set to the function | |
88 | that readline offers as callback to the event_loop. */ | |
89 | ||
c2c6d25f JM |
90 | void (*input_handler) (char *); |
91 | void (*call_readline) (gdb_client_data); | |
b5a0ac70 SS |
92 | |
93 | /* Important variables for the event loop. */ | |
94 | ||
95 | /* This is used to determine if GDB is using the readline library or | |
96 | its own simplified form of readline. It is used by the asynchronous | |
0f71a2f6 | 97 | form of the set editing command. |
392a587b | 98 | ezannoni: as of 1999-04-29 I expect that this |
b5a0ac70 SS |
99 | variable will not be used after gdb is changed to use the event |
100 | loop as default engine, and event-top.c is merged into top.c. */ | |
101 | int async_command_editing_p; | |
102 | ||
103 | /* This variable contains the new prompt that the user sets with the | |
104 | set prompt command. */ | |
105 | char *new_async_prompt; | |
106 | ||
107 | /* This is the annotation suffix that will be used when the | |
108 | annotation_level is 2. */ | |
109 | char *async_annotation_suffix; | |
110 | ||
104c1213 JM |
111 | /* This is used to display the notification of the completion of an |
112 | asynchronous execution command. */ | |
113 | int exec_done_display_p = 0; | |
114 | ||
b5a0ac70 SS |
115 | /* This is the file descriptor for the input stream that GDB uses to |
116 | read commands from. */ | |
117 | int input_fd; | |
118 | ||
119 | /* This is the prompt stack. Prompts will be pushed on the stack as | |
120 | needed by the different 'kinds' of user inputs GDB is asking | |
121 | for. See event-loop.h. */ | |
122 | struct prompts the_prompts; | |
123 | ||
124 | /* signal handling variables */ | |
125 | /* Each of these is a pointer to a function that the event loop will | |
126 | invoke if the corresponding signal has received. The real signal | |
127 | handlers mark these functions as ready to be executed and the event | |
128 | loop, in a later iteration, calls them. See the function | |
129 | invoke_async_signal_handler. */ | |
97bb9d91 | 130 | void *sigint_token; |
b5a0ac70 | 131 | #ifdef SIGHUP |
97bb9d91 | 132 | void *sighup_token; |
b5a0ac70 | 133 | #endif |
97bb9d91 EZ |
134 | void *sigquit_token; |
135 | void *sigfpe_token; | |
b5a0ac70 | 136 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
97bb9d91 | 137 | void *sigwinch_token; |
b5a0ac70 | 138 | #endif |
0f71a2f6 | 139 | #ifdef STOP_SIGNAL |
97bb9d91 | 140 | void *sigtstp_token; |
0f71a2f6 JM |
141 | #endif |
142 | ||
b5a0ac70 SS |
143 | /* Structure to save a partially entered command. This is used when |
144 | the user types '\' at the end of a command line. This is necessary | |
145 | because each line of input is handled by a different call to | |
146 | command_line_handler, and normally there is no state retained | |
147 | between different calls. */ | |
148 | int more_to_come = 0; | |
149 | ||
150 | struct readline_input_state | |
151 | { | |
152 | char *linebuffer; | |
153 | char *linebuffer_ptr; | |
154 | } | |
155 | readline_input_state; | |
156 | \f | |
157 | ||
701f9765 | 158 | /* Wrapper function for calling into the readline library. The event |
c2c6d25f JM |
159 | loop expects the callback function to have a paramter, while readline |
160 | expects none. */ | |
161 | static void | |
162 | rl_callback_read_char_wrapper (gdb_client_data client_data) | |
163 | { | |
164 | rl_callback_read_char (); | |
165 | } | |
166 | ||
b5a0ac70 | 167 | /* Initialize all the necessary variables, start the event loop, |
085dd6e6 | 168 | register readline, and stdin, start the loop. */ |
b5a0ac70 | 169 | void |
c2c6d25f | 170 | cli_command_loop (void) |
b5a0ac70 | 171 | { |
0f71a2f6 JM |
172 | int length; |
173 | char *a_prompt; | |
9e0b60a8 | 174 | char *gdb_prompt = get_prompt (); |
b5a0ac70 | 175 | |
0f71a2f6 JM |
176 | /* If we are using readline, set things up and display the first |
177 | prompt, otherwise just print the prompt. */ | |
178 | if (async_command_editing_p) | |
179 | { | |
180 | /* Tell readline what the prompt to display is and what function it | |
c5aa993b JM |
181 | will need to call after a whole line is read. This also displays |
182 | the first prompt. */ | |
9e0b60a8 | 183 | length = strlen (PREFIX (0)) + strlen (gdb_prompt) + strlen (SUFFIX (0)) + 1; |
0f71a2f6 JM |
184 | a_prompt = (char *) xmalloc (length); |
185 | strcpy (a_prompt, PREFIX (0)); | |
9e0b60a8 | 186 | strcat (a_prompt, gdb_prompt); |
0f71a2f6 JM |
187 | strcat (a_prompt, SUFFIX (0)); |
188 | rl_callback_handler_install (a_prompt, input_handler); | |
189 | } | |
190 | else | |
191 | display_gdb_prompt (0); | |
b5a0ac70 | 192 | |
085dd6e6 JM |
193 | /* Now it's time to start the event loop. */ |
194 | start_event_loop (); | |
b5a0ac70 SS |
195 | } |
196 | ||
197 | /* Change the function to be invoked every time there is a character | |
198 | ready on stdin. This is used when the user sets the editing off, | |
199 | therefore bypassing readline, and letting gdb handle the input | |
200 | itself, via gdb_readline2. Also it is used in the opposite case in | |
201 | which the user sets editing on again, by restoring readline | |
202 | handling of the input. */ | |
392a587b | 203 | static void |
c2c6d25f | 204 | change_line_handler (void) |
b5a0ac70 | 205 | { |
c2c6d25f JM |
206 | /* NOTE: this operates on input_fd, not instream. If we are reading |
207 | commands from a file, instream will point to the file. However in | |
208 | async mode, we always read commands from a file with editing | |
209 | off. This means that the 'set editing on/off' will have effect | |
210 | only on the interactive session. */ | |
211 | ||
b5a0ac70 SS |
212 | if (async_command_editing_p) |
213 | { | |
214 | /* Turn on editing by using readline. */ | |
c2c6d25f | 215 | call_readline = rl_callback_read_char_wrapper; |
0f71a2f6 | 216 | input_handler = command_line_handler; |
b5a0ac70 SS |
217 | } |
218 | else | |
219 | { | |
220 | /* Turn off editing by using gdb_readline2. */ | |
221 | rl_callback_handler_remove (); | |
222 | call_readline = gdb_readline2; | |
0f71a2f6 JM |
223 | |
224 | /* Set up the command handler as well, in case we are called as | |
c5aa993b | 225 | first thing from .gdbinit. */ |
0f71a2f6 | 226 | input_handler = command_line_handler; |
b5a0ac70 | 227 | } |
b5a0ac70 SS |
228 | } |
229 | ||
230 | /* Displays the prompt. The prompt that is displayed is the current | |
231 | top of the prompt stack, if the argument NEW_PROMPT is | |
232 | 0. Otherwise, it displays whatever NEW_PROMPT is. This is used | |
233 | after each gdb command has completed, and in the following cases: | |
0f71a2f6 JM |
234 | 1. when the user enters a command line which is ended by '\' |
235 | indicating that the command will continue on the next line. | |
b5a0ac70 | 236 | In that case the prompt that is displayed is the empty string. |
0f71a2f6 JM |
237 | 2. When the user is entering 'commands' for a breakpoint, or |
238 | actions for a tracepoint. In this case the prompt will be '>' | |
239 | 3. Other???? | |
b5a0ac70 SS |
240 | FIXME: 2. & 3. not implemented yet for async. */ |
241 | void | |
c2c6d25f | 242 | display_gdb_prompt (char *new_prompt) |
b5a0ac70 SS |
243 | { |
244 | int prompt_length = 0; | |
c5aa993b | 245 | char *gdb_prompt = get_prompt (); |
b5a0ac70 | 246 | |
fb40c209 AC |
247 | #ifdef UI_OUT |
248 | /* When an alternative interpreter has been installed, do not | |
249 | display the comand prompt. */ | |
250 | if (interpreter_p) | |
251 | return; | |
252 | #endif | |
253 | ||
6426a772 | 254 | if (target_executing && sync_execution) |
adf40b2e JM |
255 | { |
256 | /* This is to trick readline into not trying to display the | |
6426a772 JM |
257 | prompt. Even though we display the prompt using this |
258 | function, readline still tries to do its own display if we | |
259 | don't call rl_callback_handler_install and | |
260 | rl_callback_handler_remove (which readline detects because a | |
261 | global variable is not set). If readline did that, it could | |
262 | mess up gdb signal handlers for SIGINT. Readline assumes | |
263 | that between calls to rl_set_signals and rl_clear_signals gdb | |
264 | doesn't do anything with the signal handlers. Well, that's | |
265 | not the case, because when the target executes we change the | |
266 | SIGINT signal handler. If we allowed readline to display the | |
267 | prompt, the signal handler change would happen exactly | |
268 | between the calls to the above two functions. | |
269 | Calling rl_callback_handler_remove(), does the job. */ | |
adf40b2e JM |
270 | |
271 | rl_callback_handler_remove (); | |
272 | return; | |
273 | } | |
274 | ||
b5a0ac70 SS |
275 | if (!new_prompt) |
276 | { | |
277 | /* Just use the top of the prompt stack. */ | |
278 | prompt_length = strlen (PREFIX (0)) + | |
279 | strlen (SUFFIX (0)) + | |
9e0b60a8 | 280 | strlen (gdb_prompt) + 1; |
b5a0ac70 SS |
281 | |
282 | new_prompt = (char *) alloca (prompt_length); | |
283 | ||
284 | /* Prefix needs to have new line at end. */ | |
285 | strcpy (new_prompt, PREFIX (0)); | |
9e0b60a8 | 286 | strcat (new_prompt, gdb_prompt); |
b5a0ac70 SS |
287 | /* Suffix needs to have a new line at end and \032 \032 at |
288 | beginning. */ | |
289 | strcat (new_prompt, SUFFIX (0)); | |
290 | } | |
291 | ||
292 | if (async_command_editing_p) | |
293 | { | |
294 | rl_callback_handler_remove (); | |
295 | rl_callback_handler_install (new_prompt, input_handler); | |
296 | } | |
adf40b2e | 297 | /* new_prompt at this point can be the top of the stack or the one passed in */ |
b5a0ac70 SS |
298 | else if (new_prompt) |
299 | { | |
300 | /* Don't use a _filtered function here. It causes the assumed | |
301 | character position to be off, since the newline we read from | |
302 | the user is not accounted for. */ | |
303 | fputs_unfiltered (new_prompt, gdb_stdout); | |
304 | ||
d036b4d9 AC |
305 | /* OBSOLETE #ifdef MPW */ |
306 | /* OBSOLETE *//* Move to a new line so the entered line doesn't have a prompt */ | |
307 | /* OBSOLETE on the front of it. */ | |
308 | /* OBSOLETE fputs_unfiltered ("\n", gdb_stdout); */ | |
309 | /* OBSOLETE #endif *//* MPW */ | |
b5a0ac70 SS |
310 | gdb_flush (gdb_stdout); |
311 | } | |
312 | } | |
313 | ||
314 | /* Used when the user requests a different annotation level, with | |
315 | 'set annotate'. It pushes a new prompt (with prefix and suffix) on top | |
316 | of the prompt stack, if the annotation level desired is 2, otherwise | |
317 | it pops the top of the prompt stack when we want the annotation level | |
adf40b2e | 318 | to be the normal ones (1 or 0). */ |
392a587b | 319 | static void |
c2c6d25f | 320 | change_annotation_level (void) |
b5a0ac70 SS |
321 | { |
322 | char *prefix, *suffix; | |
323 | ||
324 | if (!PREFIX (0) || !PROMPT (0) || !SUFFIX (0)) | |
325 | { | |
326 | /* The prompt stack has not been initialized to "", we are | |
327 | using gdb w/o the --async switch */ | |
328 | warning ("Command has same effect as set annotate"); | |
329 | return; | |
330 | } | |
331 | ||
332 | if (annotation_level > 1) | |
333 | { | |
334 | if (!strcmp (PREFIX (0), "") && !strcmp (SUFFIX (0), "")) | |
335 | { | |
336 | /* Push a new prompt if the previous annotation_level was not >1. */ | |
337 | prefix = (char *) alloca (strlen (async_annotation_suffix) + 10); | |
338 | strcpy (prefix, "\n\032\032pre-"); | |
339 | strcat (prefix, async_annotation_suffix); | |
340 | strcat (prefix, "\n"); | |
341 | ||
342 | suffix = (char *) alloca (strlen (async_annotation_suffix) + 6); | |
343 | strcpy (suffix, "\n\032\032"); | |
344 | strcat (suffix, async_annotation_suffix); | |
345 | strcat (suffix, "\n"); | |
346 | ||
347 | push_prompt (prefix, (char *) 0, suffix); | |
348 | } | |
349 | } | |
350 | else | |
351 | { | |
352 | if (strcmp (PREFIX (0), "") && strcmp (SUFFIX (0), "")) | |
353 | { | |
354 | /* Pop the top of the stack, we are going back to annotation < 1. */ | |
355 | pop_prompt (); | |
356 | } | |
357 | } | |
358 | } | |
359 | ||
360 | /* Pushes a new prompt on the prompt stack. Each prompt has three | |
361 | parts: prefix, prompt, suffix. Usually prefix and suffix are empty | |
362 | strings, except when the annotation level is 2. Memory is allocated | |
363 | within savestring for the new prompt. */ | |
43ff13b4 | 364 | void |
c2c6d25f | 365 | push_prompt (char *prefix, char *prompt, char *suffix) |
b5a0ac70 SS |
366 | { |
367 | the_prompts.top++; | |
368 | PREFIX (0) = savestring (prefix, strlen (prefix)); | |
369 | ||
43ff13b4 JM |
370 | /* Note that this function is used by the set annotate 2 |
371 | command. This is why we take care of saving the old prompt | |
372 | in case a new one is not specified. */ | |
b5a0ac70 SS |
373 | if (prompt) |
374 | PROMPT (0) = savestring (prompt, strlen (prompt)); | |
375 | else | |
376 | PROMPT (0) = savestring (PROMPT (-1), strlen (PROMPT (-1))); | |
377 | ||
378 | SUFFIX (0) = savestring (suffix, strlen (suffix)); | |
379 | } | |
380 | ||
381 | /* Pops the top of the prompt stack, and frees the memory allocated for it. */ | |
43ff13b4 | 382 | void |
c2c6d25f | 383 | pop_prompt (void) |
b5a0ac70 | 384 | { |
43ff13b4 JM |
385 | /* If we are not during a 'synchronous' execution command, in which |
386 | case, the top prompt would be empty. */ | |
387 | if (strcmp (PROMPT (0), "")) | |
388 | /* This is for the case in which the prompt is set while the | |
389 | annotation level is 2. The top prompt will be changed, but when | |
390 | we return to annotation level < 2, we want that new prompt to be | |
391 | in effect, until the user does another 'set prompt'. */ | |
392 | if (strcmp (PROMPT (0), PROMPT (-1))) | |
393 | { | |
b8c9b27d | 394 | xfree (PROMPT (-1)); |
43ff13b4 JM |
395 | PROMPT (-1) = savestring (PROMPT (0), strlen (PROMPT (0))); |
396 | } | |
b5a0ac70 | 397 | |
b8c9b27d KB |
398 | xfree (PREFIX (0)); |
399 | xfree (PROMPT (0)); | |
400 | xfree (SUFFIX (0)); | |
b5a0ac70 SS |
401 | the_prompts.top--; |
402 | } | |
c2c6d25f JM |
403 | |
404 | /* When there is an event ready on the stdin file desriptor, instead | |
405 | of calling readline directly throught the callback function, or | |
406 | instead of calling gdb_readline2, give gdb a chance to detect | |
407 | errors and do something. */ | |
408 | void | |
2acceee2 | 409 | stdin_event_handler (int error, gdb_client_data client_data) |
c2c6d25f JM |
410 | { |
411 | if (error) | |
412 | { | |
2acceee2 JM |
413 | printf_unfiltered ("error detected on stdin\n"); |
414 | delete_file_handler (input_fd); | |
c2c6d25f JM |
415 | discard_all_continuations (); |
416 | /* If stdin died, we may as well kill gdb. */ | |
c5394b80 | 417 | quit_command ((char *) 0, stdin == instream); |
c2c6d25f JM |
418 | } |
419 | else | |
6426a772 | 420 | (*call_readline) (client_data); |
c2c6d25f JM |
421 | } |
422 | ||
6426a772 JM |
423 | /* Re-enable stdin after the end of an execution command in |
424 | synchronous mode, or after an error from the target, and we aborted | |
425 | the exec operation. */ | |
426 | ||
427 | void | |
428 | async_enable_stdin (void *dummy) | |
429 | { | |
430 | /* See NOTE in async_disable_stdin() */ | |
431 | /* FIXME: cagney/1999-09-27: Call this before clearing | |
432 | sync_execution. Current target_terminal_ours() implementations | |
433 | check for sync_execution before switching the terminal. */ | |
434 | target_terminal_ours (); | |
435 | pop_prompt (); | |
436 | sync_execution = 0; | |
437 | } | |
438 | ||
439 | /* Disable reads from stdin (the console) marking the command as | |
440 | synchronous. */ | |
441 | ||
442 | void | |
443 | async_disable_stdin (void) | |
444 | { | |
445 | sync_execution = 1; | |
446 | push_prompt ("", "", ""); | |
447 | /* FIXME: cagney/1999-09-27: At present this call is technically | |
448 | redundant since infcmd.c and infrun.c both already call | |
449 | target_terminal_inferior(). As the terminal handling (in | |
450 | sync/async mode) is refined, the duplicate calls can be | |
451 | eliminated (Here or in infcmd.c/infrun.c). */ | |
452 | target_terminal_inferior (); | |
2acceee2 JM |
453 | /* Add the reinstate of stdin to the list of cleanups to be done |
454 | in case the target errors out and dies. These cleanups are also | |
455 | done in case of normal successful termination of the execution | |
456 | command, by complete_execution(). */ | |
6426a772 JM |
457 | make_exec_error_cleanup (async_enable_stdin, NULL); |
458 | } | |
b5a0ac70 | 459 | \f |
6426a772 | 460 | |
b5a0ac70 SS |
461 | /* Handles a gdb command. This function is called by |
462 | command_line_handler, which has processed one or more input lines | |
463 | into COMMAND. */ | |
392a587b | 464 | /* NOTE: 1999-04-30 This is the asynchronous version of the command_loop |
b5a0ac70 SS |
465 | function. The command_loop function will be obsolete when we |
466 | switch to use the event loop at every execution of gdb. */ | |
392a587b | 467 | static void |
c2c6d25f | 468 | command_handler (char *command) |
b5a0ac70 SS |
469 | { |
470 | struct cleanup *old_chain; | |
471 | int stdin_is_tty = ISATTY (stdin); | |
43ff13b4 JM |
472 | struct continuation_arg *arg1; |
473 | struct continuation_arg *arg2; | |
b5a0ac70 SS |
474 | long time_at_cmd_start; |
475 | #ifdef HAVE_SBRK | |
476 | long space_at_cmd_start = 0; | |
477 | #endif | |
478 | extern int display_time; | |
479 | extern int display_space; | |
480 | ||
b5a0ac70 SS |
481 | quit_flag = 0; |
482 | if (instream == stdin && stdin_is_tty) | |
483 | reinitialize_more_filter (); | |
e2273c6d | 484 | old_chain = make_cleanup (null_cleanup, 0); |
b5a0ac70 | 485 | |
b5a0ac70 SS |
486 | /* If readline returned a NULL command, it means that the |
487 | connection with the terminal is gone. This happens at the | |
488 | end of a testsuite run, after Expect has hung up | |
489 | but GDB is still alive. In such a case, we just quit gdb | |
490 | killing the inferior program too. */ | |
491 | if (command == 0) | |
492 | quit_command ((char *) 0, stdin == instream); | |
493 | ||
494 | time_at_cmd_start = get_run_time (); | |
495 | ||
496 | if (display_space) | |
497 | { | |
498 | #ifdef HAVE_SBRK | |
499 | extern char **environ; | |
500 | char *lim = (char *) sbrk (0); | |
501 | ||
502 | space_at_cmd_start = (long) (lim - (char *) &environ); | |
503 | #endif | |
504 | } | |
505 | ||
506 | execute_command (command, instream == stdin); | |
c5aa993b | 507 | |
43ff13b4 | 508 | /* Set things up for this function to be compete later, once the |
701f9765 | 509 | execution has completed, if we are doing an execution command, |
43ff13b4 | 510 | otherwise, just go ahead and finish. */ |
6426a772 | 511 | if (target_can_async_p () && target_executing) |
43ff13b4 | 512 | { |
c5aa993b | 513 | arg1 = |
43ff13b4 | 514 | (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg)); |
c5aa993b | 515 | arg2 = |
43ff13b4 JM |
516 | (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg)); |
517 | arg1->next = arg2; | |
518 | arg2->next = NULL; | |
57e687d9 MS |
519 | arg1->data.integer = time_at_cmd_start; |
520 | arg2->data.integer = space_at_cmd_start; | |
43ff13b4 JM |
521 | add_continuation (command_line_handler_continuation, arg1); |
522 | } | |
b5a0ac70 | 523 | |
43ff13b4 JM |
524 | /* Do any commands attached to breakpoint we stopped at. Only if we |
525 | are always running synchronously. Or if we have just executed a | |
526 | command that doesn't start the target. */ | |
6426a772 | 527 | if (!target_can_async_p () || !target_executing) |
43ff13b4 JM |
528 | { |
529 | bpstat_do_actions (&stop_bpstat); | |
530 | do_cleanups (old_chain); | |
c5aa993b | 531 | |
43ff13b4 JM |
532 | if (display_time) |
533 | { | |
534 | long cmd_time = get_run_time () - time_at_cmd_start; | |
535 | ||
536 | printf_unfiltered ("Command execution time: %ld.%06ld\n", | |
537 | cmd_time / 1000000, cmd_time % 1000000); | |
538 | } | |
539 | ||
540 | if (display_space) | |
541 | { | |
542 | #ifdef HAVE_SBRK | |
543 | extern char **environ; | |
544 | char *lim = (char *) sbrk (0); | |
545 | long space_now = lim - (char *) &environ; | |
546 | long space_diff = space_now - space_at_cmd_start; | |
547 | ||
548 | printf_unfiltered ("Space used: %ld (%c%ld for this command)\n", | |
549 | space_now, | |
550 | (space_diff >= 0 ? '+' : '-'), | |
551 | space_diff); | |
552 | #endif | |
553 | } | |
554 | } | |
555 | } | |
556 | ||
557 | /* Do any commands attached to breakpoint we stopped at. Only if we | |
558 | are always running synchronously. Or if we have just executed a | |
559 | command that doesn't start the target. */ | |
560 | void | |
c2c6d25f | 561 | command_line_handler_continuation (struct continuation_arg *arg) |
c5aa993b | 562 | { |
43ff13b4 JM |
563 | extern int display_time; |
564 | extern int display_space; | |
565 | ||
57e687d9 MS |
566 | long time_at_cmd_start = arg->data.longint; |
567 | long space_at_cmd_start = arg->next->data.longint; | |
b5a0ac70 | 568 | |
43ff13b4 | 569 | bpstat_do_actions (&stop_bpstat); |
c5aa993b JM |
570 | /*do_cleanups (old_chain); *//*?????FIXME????? */ |
571 | ||
b5a0ac70 SS |
572 | if (display_time) |
573 | { | |
574 | long cmd_time = get_run_time () - time_at_cmd_start; | |
575 | ||
576 | printf_unfiltered ("Command execution time: %ld.%06ld\n", | |
577 | cmd_time / 1000000, cmd_time % 1000000); | |
578 | } | |
b5a0ac70 SS |
579 | if (display_space) |
580 | { | |
581 | #ifdef HAVE_SBRK | |
582 | extern char **environ; | |
583 | char *lim = (char *) sbrk (0); | |
584 | long space_now = lim - (char *) &environ; | |
585 | long space_diff = space_now - space_at_cmd_start; | |
586 | ||
587 | printf_unfiltered ("Space used: %ld (%c%ld for this command)\n", | |
588 | space_now, | |
589 | (space_diff >= 0 ? '+' : '-'), | |
590 | space_diff); | |
591 | #endif | |
592 | } | |
593 | } | |
594 | ||
595 | /* Handle a complete line of input. This is called by the callback | |
596 | mechanism within the readline library. Deal with incomplete commands | |
597 | as well, by saving the partial input in a global buffer. */ | |
598 | ||
392a587b | 599 | /* NOTE: 1999-04-30 This is the asynchronous version of the |
b5a0ac70 SS |
600 | command_line_input function. command_line_input will become |
601 | obsolete once we use the event loop as the default mechanism in | |
602 | GDB. */ | |
603 | static void | |
c2c6d25f | 604 | command_line_handler (char *rl) |
b5a0ac70 SS |
605 | { |
606 | static char *linebuffer = 0; | |
607 | static unsigned linelength = 0; | |
608 | register char *p; | |
609 | char *p1; | |
b5a0ac70 SS |
610 | extern char *line; |
611 | extern int linesize; | |
612 | char *nline; | |
613 | char got_eof = 0; | |
614 | ||
615 | ||
616 | int repeat = (instream == stdin); | |
617 | ||
618 | if (annotation_level > 1 && instream == stdin) | |
619 | { | |
620 | printf_unfiltered ("\n\032\032post-"); | |
621 | printf_unfiltered (async_annotation_suffix); | |
622 | printf_unfiltered ("\n"); | |
623 | } | |
624 | ||
625 | if (linebuffer == 0) | |
626 | { | |
627 | linelength = 80; | |
628 | linebuffer = (char *) xmalloc (linelength); | |
629 | } | |
630 | ||
631 | p = linebuffer; | |
632 | ||
633 | if (more_to_come) | |
634 | { | |
635 | strcpy (linebuffer, readline_input_state.linebuffer); | |
636 | p = readline_input_state.linebuffer_ptr; | |
b8c9b27d | 637 | xfree (readline_input_state.linebuffer); |
b5a0ac70 | 638 | more_to_come = 0; |
adf40b2e | 639 | pop_prompt (); |
b5a0ac70 SS |
640 | } |
641 | ||
642 | #ifdef STOP_SIGNAL | |
643 | if (job_control) | |
0f71a2f6 | 644 | signal (STOP_SIGNAL, handle_stop_sig); |
b5a0ac70 SS |
645 | #endif |
646 | ||
647 | /* Make sure that all output has been output. Some machines may let | |
648 | you get away with leaving out some of the gdb_flush, but not all. */ | |
649 | wrap_here (""); | |
650 | gdb_flush (gdb_stdout); | |
651 | gdb_flush (gdb_stderr); | |
652 | ||
653 | if (source_file_name != NULL) | |
654 | { | |
655 | ++source_line_number; | |
656 | sprintf (source_error, | |
657 | "%s%s:%d: Error in sourced command file:\n", | |
658 | source_pre_error, | |
659 | source_file_name, | |
660 | source_line_number); | |
661 | error_pre_print = source_error; | |
662 | } | |
663 | ||
664 | /* If we are in this case, then command_handler will call quit | |
665 | and exit from gdb. */ | |
666 | if (!rl || rl == (char *) EOF) | |
667 | { | |
668 | got_eof = 1; | |
669 | command_handler (0); | |
670 | } | |
671 | if (strlen (rl) + 1 + (p - linebuffer) > linelength) | |
672 | { | |
673 | linelength = strlen (rl) + 1 + (p - linebuffer); | |
674 | nline = (char *) xrealloc (linebuffer, linelength); | |
675 | p += nline - linebuffer; | |
676 | linebuffer = nline; | |
677 | } | |
678 | p1 = rl; | |
679 | /* Copy line. Don't copy null at end. (Leaves line alone | |
680 | if this was just a newline) */ | |
681 | while (*p1) | |
682 | *p++ = *p1++; | |
683 | ||
b8c9b27d | 684 | xfree (rl); /* Allocated in readline. */ |
b5a0ac70 | 685 | |
a0b3c4fd | 686 | if (*(p - 1) == '\\') |
b5a0ac70 | 687 | { |
b5a0ac70 SS |
688 | p--; /* Put on top of '\'. */ |
689 | ||
690 | if (*p == '\\') | |
691 | { | |
692 | readline_input_state.linebuffer = savestring (linebuffer, | |
693 | strlen (linebuffer)); | |
694 | readline_input_state.linebuffer_ptr = p; | |
695 | ||
696 | /* We will not invoke a execute_command if there is more | |
697 | input expected to complete the command. So, we need to | |
698 | print an empty prompt here. */ | |
b5a0ac70 | 699 | more_to_come = 1; |
adf40b2e JM |
700 | push_prompt ("", "", ""); |
701 | display_gdb_prompt (0); | |
702 | return; | |
b5a0ac70 SS |
703 | } |
704 | } | |
705 | ||
706 | #ifdef STOP_SIGNAL | |
707 | if (job_control) | |
708 | signal (STOP_SIGNAL, SIG_DFL); | |
709 | #endif | |
710 | ||
711 | #define SERVER_COMMAND_LENGTH 7 | |
712 | server_command = | |
713 | (p - linebuffer > SERVER_COMMAND_LENGTH) | |
714 | && STREQN (linebuffer, "server ", SERVER_COMMAND_LENGTH); | |
715 | if (server_command) | |
716 | { | |
717 | /* Note that we don't set `line'. Between this and the check in | |
718 | dont_repeat, this insures that repeating will still do the | |
719 | right thing. */ | |
720 | *p = '\0'; | |
721 | command_handler (linebuffer + SERVER_COMMAND_LENGTH); | |
722 | display_gdb_prompt (0); | |
723 | return; | |
724 | } | |
725 | ||
726 | /* Do history expansion if that is wished. */ | |
727 | if (history_expansion_p && instream == stdin | |
728 | && ISATTY (instream)) | |
729 | { | |
730 | char *history_value; | |
731 | int expanded; | |
732 | ||
733 | *p = '\0'; /* Insert null now. */ | |
734 | expanded = history_expand (linebuffer, &history_value); | |
735 | if (expanded) | |
736 | { | |
737 | /* Print the changes. */ | |
738 | printf_unfiltered ("%s\n", history_value); | |
739 | ||
740 | /* If there was an error, call this function again. */ | |
741 | if (expanded < 0) | |
742 | { | |
b8c9b27d | 743 | xfree (history_value); |
b5a0ac70 SS |
744 | return; |
745 | } | |
746 | if (strlen (history_value) > linelength) | |
747 | { | |
748 | linelength = strlen (history_value) + 1; | |
749 | linebuffer = (char *) xrealloc (linebuffer, linelength); | |
750 | } | |
751 | strcpy (linebuffer, history_value); | |
752 | p = linebuffer + strlen (linebuffer); | |
b8c9b27d | 753 | xfree (history_value); |
b5a0ac70 SS |
754 | } |
755 | } | |
756 | ||
757 | /* If we just got an empty line, and that is supposed | |
758 | to repeat the previous command, return the value in the | |
759 | global buffer. */ | |
760 | if (repeat && p == linebuffer && *p != '\\') | |
761 | { | |
762 | command_handler (line); | |
763 | display_gdb_prompt (0); | |
764 | return; | |
765 | } | |
766 | ||
767 | for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++); | |
768 | if (repeat && !*p1) | |
769 | { | |
770 | command_handler (line); | |
771 | display_gdb_prompt (0); | |
772 | return; | |
773 | } | |
774 | ||
775 | *p = 0; | |
776 | ||
777 | /* Add line to history if appropriate. */ | |
778 | if (instream == stdin | |
779 | && ISATTY (stdin) && *linebuffer) | |
780 | add_history (linebuffer); | |
781 | ||
782 | /* Note: lines consisting solely of comments are added to the command | |
783 | history. This is useful when you type a command, and then | |
784 | realize you don't want to execute it quite yet. You can comment | |
785 | out the command and then later fetch it from the value history | |
786 | and remove the '#'. The kill ring is probably better, but some | |
787 | people are in the habit of commenting things out. */ | |
788 | if (*p1 == '#') | |
789 | *p1 = '\0'; /* Found a comment. */ | |
790 | ||
791 | /* Save into global buffer if appropriate. */ | |
792 | if (repeat) | |
793 | { | |
794 | if (linelength > linesize) | |
795 | { | |
796 | line = xrealloc (line, linelength); | |
797 | linesize = linelength; | |
798 | } | |
799 | strcpy (line, linebuffer); | |
800 | if (!more_to_come) | |
801 | { | |
802 | command_handler (line); | |
803 | display_gdb_prompt (0); | |
804 | } | |
805 | return; | |
806 | } | |
807 | ||
808 | command_handler (linebuffer); | |
809 | display_gdb_prompt (0); | |
810 | return; | |
811 | } | |
812 | ||
813 | /* Does reading of input from terminal w/o the editing features | |
814 | provided by the readline library. */ | |
815 | ||
392a587b | 816 | /* NOTE: 1999-04-30 Asynchronous version of gdb_readline. gdb_readline |
b5a0ac70 SS |
817 | will become obsolete when the event loop is made the default |
818 | execution for gdb. */ | |
085dd6e6 | 819 | void |
c2c6d25f | 820 | gdb_readline2 (gdb_client_data client_data) |
b5a0ac70 SS |
821 | { |
822 | int c; | |
823 | char *result; | |
824 | int input_index = 0; | |
825 | int result_size = 80; | |
7be570e7 JM |
826 | static int done_once = 0; |
827 | ||
828 | /* Unbuffer the input stream, so that, later on, the calls to fgetc | |
829 | fetch only one char at the time from the stream. The fgetc's will | |
830 | get up to the first newline, but there may be more chars in the | |
831 | stream after '\n'. If we buffer the input and fgetc drains the | |
832 | stream, getting stuff beyond the newline as well, a select, done | |
833 | afterwards will not trigger. */ | |
834 | if (!done_once && !ISATTY (instream)) | |
835 | { | |
836 | setbuf (instream, NULL); | |
837 | done_once = 1; | |
838 | } | |
b5a0ac70 SS |
839 | |
840 | result = (char *) xmalloc (result_size); | |
841 | ||
842 | /* We still need the while loop here, even though it would seem | |
843 | obvious to invoke gdb_readline2 at every character entered. If | |
844 | not using the readline library, the terminal is in cooked mode, | |
845 | which sends the characters all at once. Poll will notice that the | |
846 | input fd has changed state only after enter is pressed. At this | |
847 | point we still need to fetch all the chars entered. */ | |
848 | ||
849 | while (1) | |
850 | { | |
851 | /* Read from stdin if we are executing a user defined command. | |
852 | This is the right thing for prompt_for_continue, at least. */ | |
853 | c = fgetc (instream ? instream : stdin); | |
854 | ||
855 | if (c == EOF) | |
856 | { | |
857 | if (input_index > 0) | |
858 | /* The last line does not end with a newline. Return it, and | |
859 | if we are called again fgetc will still return EOF and | |
860 | we'll return NULL then. */ | |
861 | break; | |
b8c9b27d | 862 | xfree (result); |
0f71a2f6 | 863 | (*input_handler) (0); |
b5a0ac70 SS |
864 | } |
865 | ||
866 | if (c == '\n') | |
867 | #ifndef CRLF_SOURCE_FILES | |
868 | break; | |
869 | #else | |
870 | { | |
871 | if (input_index > 0 && result[input_index - 1] == '\r') | |
872 | input_index--; | |
873 | break; | |
874 | } | |
875 | #endif | |
876 | ||
877 | result[input_index++] = c; | |
878 | while (input_index >= result_size) | |
879 | { | |
880 | result_size *= 2; | |
881 | result = (char *) xrealloc (result, result_size); | |
882 | } | |
883 | } | |
884 | ||
885 | result[input_index++] = '\0'; | |
0f71a2f6 | 886 | (*input_handler) (result); |
b5a0ac70 SS |
887 | } |
888 | \f | |
889 | ||
890 | /* Initialization of signal handlers and tokens. There is a function | |
891 | handle_sig* for each of the signals GDB cares about. Specifically: | |
892 | SIGINT, SIGFPE, SIGQUIT, SIGTSTP, SIGHUP, SIGWINCH. These | |
893 | functions are the actual signal handlers associated to the signals | |
894 | via calls to signal(). The only job for these functions is to | |
895 | enqueue the appropriate event/procedure with the event loop. Such | |
896 | procedures are the old signal handlers. The event loop will take | |
897 | care of invoking the queued procedures to perform the usual tasks | |
898 | associated with the reception of the signal. */ | |
392a587b | 899 | /* NOTE: 1999-04-30 This is the asynchronous version of init_signals. |
b5a0ac70 SS |
900 | init_signals will become obsolete as we move to have to event loop |
901 | as the default for gdb. */ | |
902 | void | |
c2c6d25f | 903 | async_init_signals (void) |
c5aa993b | 904 | { |
b5a0ac70 SS |
905 | signal (SIGINT, handle_sigint); |
906 | sigint_token = | |
0f71a2f6 | 907 | create_async_signal_handler (async_request_quit, NULL); |
b5a0ac70 SS |
908 | |
909 | /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed | |
910 | to the inferior and breakpoints will be ignored. */ | |
911 | #ifdef SIGTRAP | |
912 | signal (SIGTRAP, SIG_DFL); | |
913 | #endif | |
914 | ||
915 | /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get | |
916 | passed to the inferior, which we don't want. It would be | |
917 | possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but | |
918 | on BSD4.3 systems using vfork, that can affect the | |
919 | GDB process as well as the inferior (the signal handling tables | |
920 | might be in memory, shared between the two). Since we establish | |
921 | a handler for SIGQUIT, when we call exec it will set the signal | |
922 | to SIG_DFL for us. */ | |
923 | signal (SIGQUIT, handle_sigquit); | |
924 | sigquit_token = | |
0f71a2f6 | 925 | create_async_signal_handler (async_do_nothing, NULL); |
b5a0ac70 SS |
926 | #ifdef SIGHUP |
927 | if (signal (SIGHUP, handle_sighup) != SIG_IGN) | |
928 | sighup_token = | |
0f71a2f6 | 929 | create_async_signal_handler (async_disconnect, NULL); |
b5a0ac70 SS |
930 | else |
931 | sighup_token = | |
0f71a2f6 | 932 | create_async_signal_handler (async_do_nothing, NULL); |
b5a0ac70 SS |
933 | #endif |
934 | signal (SIGFPE, handle_sigfpe); | |
935 | sigfpe_token = | |
0f71a2f6 | 936 | create_async_signal_handler (async_float_handler, NULL); |
b5a0ac70 SS |
937 | |
938 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) | |
939 | signal (SIGWINCH, handle_sigwinch); | |
940 | sigwinch_token = | |
0f71a2f6 | 941 | create_async_signal_handler (SIGWINCH_HANDLER, NULL); |
b5a0ac70 | 942 | #endif |
0f71a2f6 JM |
943 | #ifdef STOP_SIGNAL |
944 | sigtstp_token = | |
945 | create_async_signal_handler (async_stop_sig, NULL); | |
946 | #endif | |
947 | ||
948 | } | |
949 | ||
c5aa993b | 950 | void |
97bb9d91 | 951 | mark_async_signal_handler_wrapper (void *token) |
0f71a2f6 | 952 | { |
c2c6d25f | 953 | mark_async_signal_handler ((struct async_signal_handler *) token); |
b5a0ac70 SS |
954 | } |
955 | ||
956 | /* Tell the event loop what to do if SIGINT is received. | |
957 | See event-signal.c. */ | |
c5aa993b | 958 | void |
c2c6d25f | 959 | handle_sigint (int sig) |
b5a0ac70 SS |
960 | { |
961 | signal (sig, handle_sigint); | |
962 | ||
963 | /* If immediate_quit is set, we go ahead and process the SIGINT right | |
964 | away, even if we usually would defer this to the event loop. The | |
965 | assumption here is that it is safe to process ^C immediately if | |
966 | immediate_quit is set. If we didn't, SIGINT would be really | |
967 | processed only the next time through the event loop. To get to | |
968 | that point, though, the command that we want to interrupt needs to | |
969 | finish first, which is unacceptable. */ | |
970 | if (immediate_quit) | |
0f71a2f6 | 971 | async_request_quit (0); |
b5a0ac70 SS |
972 | else |
973 | /* If immediate quit is not set, we process SIGINT the next time | |
974 | through the loop, which is fine. */ | |
0f71a2f6 | 975 | mark_async_signal_handler_wrapper (sigint_token); |
b5a0ac70 SS |
976 | } |
977 | ||
978 | /* Do the quit. All the checks have been done by the caller. */ | |
c5aa993b | 979 | void |
c2c6d25f | 980 | async_request_quit (gdb_client_data arg) |
b5a0ac70 SS |
981 | { |
982 | quit_flag = 1; | |
983 | #ifdef REQUEST_QUIT | |
984 | REQUEST_QUIT; | |
985 | #else | |
986 | quit (); | |
987 | #endif | |
988 | } | |
989 | ||
990 | /* Tell the event loop what to do if SIGQUIT is received. | |
991 | See event-signal.c. */ | |
c5aa993b | 992 | static void |
c2c6d25f | 993 | handle_sigquit (int sig) |
b5a0ac70 | 994 | { |
0f71a2f6 | 995 | mark_async_signal_handler_wrapper (sigquit_token); |
b5a0ac70 SS |
996 | signal (sig, handle_sigquit); |
997 | } | |
998 | ||
999 | /* Called by the event loop in response to a SIGQUIT. */ | |
c5aa993b | 1000 | static void |
c2c6d25f | 1001 | async_do_nothing (gdb_client_data arg) |
b5a0ac70 SS |
1002 | { |
1003 | /* Empty function body. */ | |
1004 | } | |
1005 | ||
1006 | #ifdef SIGHUP | |
1007 | /* Tell the event loop what to do if SIGHUP is received. | |
1008 | See event-signal.c. */ | |
c5aa993b | 1009 | static void |
fba45db2 | 1010 | handle_sighup (int sig) |
b5a0ac70 | 1011 | { |
0f71a2f6 | 1012 | mark_async_signal_handler_wrapper (sighup_token); |
b5a0ac70 SS |
1013 | signal (sig, handle_sighup); |
1014 | } | |
1015 | ||
0f71a2f6 | 1016 | /* Called by the event loop to process a SIGHUP */ |
c5aa993b | 1017 | static void |
c2c6d25f | 1018 | async_disconnect (gdb_client_data arg) |
b5a0ac70 SS |
1019 | { |
1020 | catch_errors (quit_cover, NULL, | |
1021 | "Could not kill the program being debugged", | |
1022 | RETURN_MASK_ALL); | |
1023 | signal (SIGHUP, SIG_DFL); /*FIXME: ??????????? */ | |
1024 | kill (getpid (), SIGHUP); | |
1025 | } | |
1026 | #endif | |
1027 | ||
0f71a2f6 | 1028 | #ifdef STOP_SIGNAL |
c5aa993b | 1029 | void |
c2c6d25f | 1030 | handle_stop_sig (int sig) |
0f71a2f6 | 1031 | { |
c5aa993b JM |
1032 | mark_async_signal_handler_wrapper (sigtstp_token); |
1033 | signal (sig, handle_stop_sig); | |
0f71a2f6 JM |
1034 | } |
1035 | ||
1036 | static void | |
c2c6d25f | 1037 | async_stop_sig (gdb_client_data arg) |
0f71a2f6 | 1038 | { |
c5aa993b | 1039 | char *prompt = get_prompt (); |
0f71a2f6 JM |
1040 | #if STOP_SIGNAL == SIGTSTP |
1041 | signal (SIGTSTP, SIG_DFL); | |
2acceee2 JM |
1042 | #if HAVE_SIGPROCMASK |
1043 | { | |
1044 | sigset_t zero; | |
1045 | sigemptyset (&zero); | |
1046 | sigprocmask (SIG_SETMASK, &zero, 0); | |
1047 | } | |
1048 | #else | |
0f71a2f6 | 1049 | sigsetmask (0); |
2acceee2 | 1050 | #endif |
0f71a2f6 JM |
1051 | kill (getpid (), SIGTSTP); |
1052 | signal (SIGTSTP, handle_stop_sig); | |
1053 | #else | |
1054 | signal (STOP_SIGNAL, handle_stop_sig); | |
1055 | #endif | |
1056 | printf_unfiltered ("%s", prompt); | |
1057 | gdb_flush (gdb_stdout); | |
1058 | ||
1059 | /* Forget about any previous command -- null line now will do nothing. */ | |
1060 | dont_repeat (); | |
1061 | } | |
1062 | #endif /* STOP_SIGNAL */ | |
1063 | ||
b5a0ac70 SS |
1064 | /* Tell the event loop what to do if SIGFPE is received. |
1065 | See event-signal.c. */ | |
c5aa993b | 1066 | static void |
c2c6d25f | 1067 | handle_sigfpe (int sig) |
b5a0ac70 | 1068 | { |
0f71a2f6 | 1069 | mark_async_signal_handler_wrapper (sigfpe_token); |
b5a0ac70 SS |
1070 | signal (sig, handle_sigfpe); |
1071 | } | |
1072 | ||
1073 | /* Event loop will call this functin to process a SIGFPE. */ | |
c5aa993b | 1074 | static void |
c2c6d25f | 1075 | async_float_handler (gdb_client_data arg) |
b5a0ac70 SS |
1076 | { |
1077 | /* This message is based on ANSI C, section 4.7. Note that integer | |
1078 | divide by zero causes this, so "float" is a misnomer. */ | |
1079 | error ("Erroneous arithmetic operation."); | |
1080 | } | |
1081 | ||
1082 | /* Tell the event loop what to do if SIGWINCH is received. | |
1083 | See event-signal.c. */ | |
1084 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) | |
c5aa993b | 1085 | static void |
c2c6d25f | 1086 | handle_sigwinch (int sig) |
b5a0ac70 | 1087 | { |
0f71a2f6 | 1088 | mark_async_signal_handler_wrapper (sigwinch_token); |
b5a0ac70 SS |
1089 | signal (sig, handle_sigwinch); |
1090 | } | |
1091 | #endif | |
1092 | \f | |
1093 | ||
1094 | /* Called by do_setshow_command. */ | |
1095 | /* ARGSUSED */ | |
1096 | void | |
c2c6d25f | 1097 | set_async_editing_command (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 SS |
1098 | { |
1099 | change_line_handler (); | |
1100 | } | |
1101 | ||
1102 | /* Called by do_setshow_command. */ | |
1103 | /* ARGSUSED */ | |
1104 | void | |
c2c6d25f | 1105 | set_async_annotation_level (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 SS |
1106 | { |
1107 | change_annotation_level (); | |
1108 | } | |
1109 | ||
1110 | /* Called by do_setshow_command. */ | |
1111 | /* ARGSUSED */ | |
1112 | void | |
c2c6d25f | 1113 | set_async_prompt (char *args, int from_tty, struct cmd_list_element *c) |
b5a0ac70 SS |
1114 | { |
1115 | PROMPT (0) = savestring (new_async_prompt, strlen (new_async_prompt)); | |
1116 | } | |
1117 | ||
0f71a2f6 JM |
1118 | /* Set things up for readline to be invoked via the alternate |
1119 | interface, i.e. via a callback function (rl_callback_read_char), | |
c5aa993b | 1120 | and hook up instream to the event loop. */ |
0f71a2f6 | 1121 | void |
c2c6d25f | 1122 | _initialize_event_loop (void) |
0f71a2f6 | 1123 | { |
6426a772 | 1124 | if (event_loop_p) |
9e0b60a8 | 1125 | { |
c5201926 EZ |
1126 | /* If the input stream is connected to a terminal, turn on |
1127 | editing. */ | |
1128 | if (ISATTY (instream)) | |
1129 | { | |
1130 | /* Tell gdb that we will be using the readline library. This | |
1131 | could be overwritten by a command in .gdbinit like 'set | |
1132 | editing on' or 'off'. */ | |
1133 | async_command_editing_p = 1; | |
1134 | ||
1135 | /* When a character is detected on instream by select or | |
1136 | poll, readline will be invoked via this callback | |
1137 | function. */ | |
1138 | call_readline = rl_callback_read_char_wrapper; | |
1139 | } | |
1140 | else | |
1141 | { | |
1142 | async_command_editing_p = 0; | |
1143 | call_readline = gdb_readline2; | |
1144 | } | |
9e0b60a8 JM |
1145 | |
1146 | /* When readline has read an end-of-line character, it passes | |
c5aa993b JM |
1147 | the complete line to gdb for processing. command_line_handler |
1148 | is the function that does this. */ | |
9e0b60a8 JM |
1149 | input_handler = command_line_handler; |
1150 | ||
1151 | /* Tell readline to use the same input stream that gdb uses. */ | |
1152 | rl_instream = instream; | |
1153 | ||
1154 | /* Get a file descriptor for the input stream, so that we can | |
085dd6e6 | 1155 | register it with the event loop. */ |
9e0b60a8 JM |
1156 | input_fd = fileno (instream); |
1157 | ||
085dd6e6 JM |
1158 | /* Tell gdb to use the cli_command_loop as the main loop. */ |
1159 | command_loop_hook = cli_command_loop; | |
1160 | ||
9e0b60a8 JM |
1161 | /* Now we need to create the event sources for the input file |
1162 | descriptor. */ | |
1163 | /* At this point in time, this is the only event source that we | |
c5aa993b JM |
1164 | register with the even loop. Another source is going to be |
1165 | the target program (inferior), but that must be registered | |
1166 | only when it actually exists (I.e. after we say 'run' or | |
1167 | after we connect to a remote target. */ | |
c2c6d25f | 1168 | add_file_handler (input_fd, stdin_event_handler, 0); |
9e0b60a8 | 1169 | } |
0f71a2f6 | 1170 | } |