File: | src/gnu/usr.bin/binutils/gdb/event-top.c |
Warning: | line 675, column 10 Dereference of null pointer (loaded from variable 'p1') |
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1 | /* Top level stuff for GDB, the GNU debugger. | |||
2 | Copyright 1999, 2000, 2001, 2002, 2004 Free Software Foundation, Inc. | |||
3 | Written by Elena Zannoni <ezannoni@cygnus.com> of Cygnus Solutions. | |||
4 | ||||
5 | This file is part of GDB. | |||
6 | ||||
7 | This program is free software; you can redistribute it and/or modify | |||
8 | it under the terms of the GNU General Public License as published by | |||
9 | the Free Software Foundation; either version 2 of the License, or | |||
10 | (at your option) any later version. | |||
11 | ||||
12 | This program is distributed in the hope that it will be useful, | |||
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |||
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |||
15 | GNU General Public License for more details. | |||
16 | ||||
17 | You should have received a copy of the GNU General Public License | |||
18 | along with this program; if not, write to the Free Software | |||
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |||
20 | Boston, MA 02111-1307, USA. */ | |||
21 | ||||
22 | #include "defs.h" | |||
23 | #include "top.h" | |||
24 | #include "inferior.h" | |||
25 | #include "target.h" | |||
26 | #include "terminal.h" /* for job_control */ | |||
27 | #include "event-loop.h" | |||
28 | #include "event-top.h" | |||
29 | #include "interps.h" | |||
30 | #include <signal.h> | |||
31 | ||||
32 | /* For dont_repeat() */ | |||
33 | #include "gdbcmd.h" | |||
34 | ||||
35 | /* readline include files */ | |||
36 | #include "readline/readline.h" | |||
37 | #include "readline/history.h" | |||
38 | ||||
39 | /* readline defines this. */ | |||
40 | #undef savestring | |||
41 | ||||
42 | static void rl_callback_read_char_wrapper (gdb_client_data client_data); | |||
43 | static void command_line_handler (char *rl); | |||
44 | static void command_line_handler_continuation (struct continuation_arg *arg); | |||
45 | static void change_line_handler (void); | |||
46 | static void change_annotation_level (void); | |||
47 | static void command_handler (char *command); | |||
48 | static void async_do_nothing (gdb_client_data arg); | |||
49 | static void async_disconnect (gdb_client_data arg); | |||
50 | static void async_stop_sig (gdb_client_data arg); | |||
51 | static void async_float_handler (gdb_client_data arg); | |||
52 | ||||
53 | /* Signal handlers. */ | |||
54 | static void handle_sigquit (int sig); | |||
55 | static void handle_sighup (int sig); | |||
56 | static void handle_sigfpe (int sig); | |||
57 | #if defined(SIGWINCH28) && defined(SIGWINCH_HANDLER) | |||
58 | static void handle_sigwinch (int sig); | |||
59 | #endif | |||
60 | ||||
61 | /* Functions to be invoked by the event loop in response to | |||
62 | signals. */ | |||
63 | static void async_do_nothing (gdb_client_data); | |||
64 | static void async_disconnect (gdb_client_data); | |||
65 | static void async_float_handler (gdb_client_data); | |||
66 | static void async_stop_sig (gdb_client_data); | |||
67 | ||||
68 | /* Readline offers an alternate interface, via callback | |||
69 | functions. These are all included in the file callback.c in the | |||
70 | readline distribution. This file provides (mainly) a function, which | |||
71 | the event loop uses as callback (i.e. event handler) whenever an event | |||
72 | is detected on the standard input file descriptor. | |||
73 | readline_callback_read_char is called (by the GDB event loop) whenever | |||
74 | there is a new character ready on the input stream. This function | |||
75 | incrementally builds a buffer internal to readline where it | |||
76 | accumulates the line read up to the point of invocation. In the | |||
77 | special case in which the character read is newline, the function | |||
78 | invokes a GDB supplied callback routine, which does the processing of | |||
79 | a full command line. This latter routine is the asynchronous analog | |||
80 | of the old command_line_input in gdb. Instead of invoking (and waiting | |||
81 | for) readline to read the command line and pass it back to | |||
82 | command_loop for processing, the new command_line_handler function has | |||
83 | the command line already available as its parameter. INPUT_HANDLER is | |||
84 | to be set to the function that readline will invoke when a complete | |||
85 | line of input is ready. CALL_READLINE is to be set to the function | |||
86 | that readline offers as callback to the event_loop. */ | |||
87 | ||||
88 | void (*input_handler) (char *); | |||
89 | void (*call_readline) (gdb_client_data); | |||
90 | ||||
91 | /* Important variables for the event loop. */ | |||
92 | ||||
93 | /* This is used to determine if GDB is using the readline library or | |||
94 | its own simplified form of readline. It is used by the asynchronous | |||
95 | form of the set editing command. | |||
96 | ezannoni: as of 1999-04-29 I expect that this | |||
97 | variable will not be used after gdb is changed to use the event | |||
98 | loop as default engine, and event-top.c is merged into top.c. */ | |||
99 | int async_command_editing_p; | |||
100 | ||||
101 | /* This variable contains the new prompt that the user sets with the | |||
102 | set prompt command. */ | |||
103 | char *new_async_prompt; | |||
104 | ||||
105 | /* This is the annotation suffix that will be used when the | |||
106 | annotation_level is 2. */ | |||
107 | char *async_annotation_suffix; | |||
108 | ||||
109 | /* This is used to display the notification of the completion of an | |||
110 | asynchronous execution command. */ | |||
111 | int exec_done_display_p = 0; | |||
112 | ||||
113 | /* This is the file descriptor for the input stream that GDB uses to | |||
114 | read commands from. */ | |||
115 | int input_fd; | |||
116 | ||||
117 | /* This is the prompt stack. Prompts will be pushed on the stack as | |||
118 | needed by the different 'kinds' of user inputs GDB is asking | |||
119 | for. See event-loop.h. */ | |||
120 | struct prompts the_prompts; | |||
121 | ||||
122 | /* signal handling variables */ | |||
123 | /* Each of these is a pointer to a function that the event loop will | |||
124 | invoke if the corresponding signal has received. The real signal | |||
125 | handlers mark these functions as ready to be executed and the event | |||
126 | loop, in a later iteration, calls them. See the function | |||
127 | invoke_async_signal_handler. */ | |||
128 | void *sigint_token; | |||
129 | #ifdef SIGHUP1 | |||
130 | void *sighup_token; | |||
131 | #endif | |||
132 | void *sigquit_token; | |||
133 | void *sigfpe_token; | |||
134 | #if defined(SIGWINCH28) && defined(SIGWINCH_HANDLER) | |||
135 | void *sigwinch_token; | |||
136 | #endif | |||
137 | #ifdef STOP_SIGNAL18 | |||
138 | void *sigtstp_token; | |||
139 | #endif | |||
140 | ||||
141 | /* Structure to save a partially entered command. This is used when | |||
142 | the user types '\' at the end of a command line. This is necessary | |||
143 | because each line of input is handled by a different call to | |||
144 | command_line_handler, and normally there is no state retained | |||
145 | between different calls. */ | |||
146 | int more_to_come = 0; | |||
147 | ||||
148 | struct readline_input_state | |||
149 | { | |||
150 | char *linebuffer; | |||
151 | char *linebuffer_ptr; | |||
152 | } | |||
153 | readline_input_state; | |||
154 | ||||
155 | /* This hook is called by rl_callback_read_char_wrapper after each | |||
156 | character is processed. */ | |||
157 | void (*after_char_processing_hook) (); | |||
158 | ||||
159 | ||||
160 | /* Wrapper function for calling into the readline library. The event | |||
161 | loop expects the callback function to have a paramter, while readline | |||
162 | expects none. */ | |||
163 | static void | |||
164 | rl_callback_read_char_wrapper (gdb_client_data client_data) | |||
165 | { | |||
166 | rl_callback_read_char (); | |||
167 | if (after_char_processing_hook) | |||
168 | (*after_char_processing_hook) (); | |||
169 | } | |||
170 | ||||
171 | /* Initialize all the necessary variables, start the event loop, | |||
172 | register readline, and stdin, start the loop. */ | |||
173 | void | |||
174 | cli_command_loop (void) | |||
175 | { | |||
176 | int length; | |||
177 | char *a_prompt; | |||
178 | char *gdb_prompt = get_prompt (); | |||
179 | ||||
180 | /* If we are using readline, set things up and display the first | |||
181 | prompt, otherwise just print the prompt. */ | |||
182 | if (async_command_editing_p) | |||
183 | { | |||
184 | /* Tell readline what the prompt to display is and what function it | |||
185 | will need to call after a whole line is read. This also displays | |||
186 | the first prompt. */ | |||
187 | length = strlen (PREFIX (0)the_prompts.prompt_stack[the_prompts.top + 0].prefix) + strlen (gdb_prompt) + strlen (SUFFIX (0)the_prompts.prompt_stack[the_prompts.top + 0].suffix) + 1; | |||
188 | a_prompt = (char *) xmalloc (length); | |||
189 | strcpy (a_prompt, PREFIX (0)the_prompts.prompt_stack[the_prompts.top + 0].prefix); | |||
190 | strcat (a_prompt, gdb_prompt); | |||
191 | strcat (a_prompt, SUFFIX (0)the_prompts.prompt_stack[the_prompts.top + 0].suffix); | |||
192 | rl_callback_handler_install (a_prompt, input_handler); | |||
193 | } | |||
194 | else | |||
195 | display_gdb_prompt (0); | |||
196 | ||||
197 | /* Now it's time to start the event loop. */ | |||
198 | start_event_loop (); | |||
199 | } | |||
200 | ||||
201 | /* Change the function to be invoked every time there is a character | |||
202 | ready on stdin. This is used when the user sets the editing off, | |||
203 | therefore bypassing readline, and letting gdb handle the input | |||
204 | itself, via gdb_readline2. Also it is used in the opposite case in | |||
205 | which the user sets editing on again, by restoring readline | |||
206 | handling of the input. */ | |||
207 | static void | |||
208 | change_line_handler (void) | |||
209 | { | |||
210 | /* NOTE: this operates on input_fd, not instream. If we are reading | |||
211 | commands from a file, instream will point to the file. However in | |||
212 | async mode, we always read commands from a file with editing | |||
213 | off. This means that the 'set editing on/off' will have effect | |||
214 | only on the interactive session. */ | |||
215 | ||||
216 | if (async_command_editing_p) | |||
217 | { | |||
218 | /* Turn on editing by using readline. */ | |||
219 | call_readline = rl_callback_read_char_wrapper; | |||
220 | input_handler = command_line_handler; | |||
221 | } | |||
222 | else | |||
223 | { | |||
224 | /* Turn off editing by using gdb_readline2. */ | |||
225 | rl_callback_handler_remove (); | |||
226 | call_readline = gdb_readline2; | |||
227 | ||||
228 | /* Set up the command handler as well, in case we are called as | |||
229 | first thing from .gdbinit. */ | |||
230 | input_handler = command_line_handler; | |||
231 | } | |||
232 | } | |||
233 | ||||
234 | /* Displays the prompt. The prompt that is displayed is the current | |||
235 | top of the prompt stack, if the argument NEW_PROMPT is | |||
236 | 0. Otherwise, it displays whatever NEW_PROMPT is. This is used | |||
237 | after each gdb command has completed, and in the following cases: | |||
238 | 1. when the user enters a command line which is ended by '\' | |||
239 | indicating that the command will continue on the next line. | |||
240 | In that case the prompt that is displayed is the empty string. | |||
241 | 2. When the user is entering 'commands' for a breakpoint, or | |||
242 | actions for a tracepoint. In this case the prompt will be '>' | |||
243 | 3. Other???? | |||
244 | FIXME: 2. & 3. not implemented yet for async. */ | |||
245 | void | |||
246 | display_gdb_prompt (char *new_prompt) | |||
247 | { | |||
248 | int prompt_length = 0; | |||
249 | char *gdb_prompt = get_prompt (); | |||
250 | ||||
251 | /* Each interpreter has its own rules on displaying the command | |||
252 | prompt. */ | |||
253 | if (!current_interp_display_prompt_p ()) | |||
254 | return; | |||
255 | ||||
256 | if (target_executing && sync_execution) | |||
257 | { | |||
258 | /* This is to trick readline into not trying to display the | |||
259 | prompt. Even though we display the prompt using this | |||
260 | function, readline still tries to do its own display if we | |||
261 | don't call rl_callback_handler_install and | |||
262 | rl_callback_handler_remove (which readline detects because a | |||
263 | global variable is not set). If readline did that, it could | |||
264 | mess up gdb signal handlers for SIGINT. Readline assumes | |||
265 | that between calls to rl_set_signals and rl_clear_signals gdb | |||
266 | doesn't do anything with the signal handlers. Well, that's | |||
267 | not the case, because when the target executes we change the | |||
268 | SIGINT signal handler. If we allowed readline to display the | |||
269 | prompt, the signal handler change would happen exactly | |||
270 | between the calls to the above two functions. | |||
271 | Calling rl_callback_handler_remove(), does the job. */ | |||
272 | ||||
273 | rl_callback_handler_remove (); | |||
274 | return; | |||
275 | } | |||
276 | ||||
277 | if (!new_prompt) | |||
278 | { | |||
279 | /* Just use the top of the prompt stack. */ | |||
280 | prompt_length = strlen (PREFIX (0)the_prompts.prompt_stack[the_prompts.top + 0].prefix) + | |||
281 | strlen (SUFFIX (0)the_prompts.prompt_stack[the_prompts.top + 0].suffix) + | |||
282 | strlen (gdb_prompt) + 1; | |||
283 | ||||
284 | new_prompt = (char *) alloca (prompt_length)__builtin_alloca(prompt_length); | |||
285 | ||||
286 | /* Prefix needs to have new line at end. */ | |||
287 | strcpy (new_prompt, PREFIX (0)the_prompts.prompt_stack[the_prompts.top + 0].prefix); | |||
288 | strcat (new_prompt, gdb_prompt); | |||
289 | /* Suffix needs to have a new line at end and \032 \032 at | |||
290 | beginning. */ | |||
291 | strcat (new_prompt, SUFFIX (0)the_prompts.prompt_stack[the_prompts.top + 0].suffix); | |||
292 | } | |||
293 | ||||
294 | if (async_command_editing_p) | |||
295 | { | |||
296 | rl_callback_handler_remove (); | |||
297 | rl_callback_handler_install (new_prompt, input_handler); | |||
298 | } | |||
299 | /* new_prompt at this point can be the top of the stack or the one passed in */ | |||
300 | else if (new_prompt) | |||
301 | { | |||
302 | /* Don't use a _filtered function here. It causes the assumed | |||
303 | character position to be off, since the newline we read from | |||
304 | the user is not accounted for. */ | |||
305 | fputs_unfiltered (new_prompt, gdb_stdout); | |||
306 | gdb_flush (gdb_stdout); | |||
307 | } | |||
308 | } | |||
309 | ||||
310 | /* Used when the user requests a different annotation level, with | |||
311 | 'set annotate'. It pushes a new prompt (with prefix and suffix) on top | |||
312 | of the prompt stack, if the annotation level desired is 2, otherwise | |||
313 | it pops the top of the prompt stack when we want the annotation level | |||
314 | to be the normal ones (1 or 0). */ | |||
315 | static void | |||
316 | change_annotation_level (void) | |||
317 | { | |||
318 | char *prefix, *suffix; | |||
319 | ||||
320 | if (!PREFIX (0)the_prompts.prompt_stack[the_prompts.top + 0].prefix || !PROMPT (0)the_prompts.prompt_stack[the_prompts.top + 0].prompt || !SUFFIX (0)the_prompts.prompt_stack[the_prompts.top + 0].suffix) | |||
321 | { | |||
322 | /* The prompt stack has not been initialized to "", we are | |||
323 | using gdb w/o the --async switch */ | |||
324 | warning ("Command has same effect as set annotate"); | |||
325 | return; | |||
326 | } | |||
327 | ||||
328 | if (annotation_level > 1) | |||
329 | { | |||
330 | if (!strcmp (PREFIX (0)the_prompts.prompt_stack[the_prompts.top + 0].prefix, "") && !strcmp (SUFFIX (0)the_prompts.prompt_stack[the_prompts.top + 0].suffix, "")) | |||
331 | { | |||
332 | /* Push a new prompt if the previous annotation_level was not >1. */ | |||
333 | prefix = (char *) alloca (strlen (async_annotation_suffix) + 10)__builtin_alloca(strlen (async_annotation_suffix) + 10); | |||
334 | strcpy (prefix, "\n\032\032pre-"); | |||
335 | strcat (prefix, async_annotation_suffix); | |||
336 | strcat (prefix, "\n"); | |||
337 | ||||
338 | suffix = (char *) alloca (strlen (async_annotation_suffix) + 6)__builtin_alloca(strlen (async_annotation_suffix) + 6); | |||
339 | strcpy (suffix, "\n\032\032"); | |||
340 | strcat (suffix, async_annotation_suffix); | |||
341 | strcat (suffix, "\n"); | |||
342 | ||||
343 | push_prompt (prefix, (char *) 0, suffix); | |||
344 | } | |||
345 | } | |||
346 | else | |||
347 | { | |||
348 | if (strcmp (PREFIX (0)the_prompts.prompt_stack[the_prompts.top + 0].prefix, "") && strcmp (SUFFIX (0)the_prompts.prompt_stack[the_prompts.top + 0].suffix, "")) | |||
349 | { | |||
350 | /* Pop the top of the stack, we are going back to annotation < 1. */ | |||
351 | pop_prompt (); | |||
352 | } | |||
353 | } | |||
354 | } | |||
355 | ||||
356 | /* Pushes a new prompt on the prompt stack. Each prompt has three | |||
357 | parts: prefix, prompt, suffix. Usually prefix and suffix are empty | |||
358 | strings, except when the annotation level is 2. Memory is allocated | |||
359 | within savestring for the new prompt. */ | |||
360 | void | |||
361 | push_prompt (char *prefix, char *prompt, char *suffix) | |||
362 | { | |||
363 | the_prompts.top++; | |||
364 | PREFIX (0)the_prompts.prompt_stack[the_prompts.top + 0].prefix = savestring (prefix, strlen (prefix)); | |||
365 | ||||
366 | /* Note that this function is used by the set annotate 2 | |||
367 | command. This is why we take care of saving the old prompt | |||
368 | in case a new one is not specified. */ | |||
369 | if (prompt) | |||
370 | PROMPT (0)the_prompts.prompt_stack[the_prompts.top + 0].prompt = savestring (prompt, strlen (prompt)); | |||
371 | else | |||
372 | PROMPT (0)the_prompts.prompt_stack[the_prompts.top + 0].prompt = savestring (PROMPT (-1)the_prompts.prompt_stack[the_prompts.top + -1].prompt, strlen (PROMPT (-1)the_prompts.prompt_stack[the_prompts.top + -1].prompt)); | |||
373 | ||||
374 | SUFFIX (0)the_prompts.prompt_stack[the_prompts.top + 0].suffix = savestring (suffix, strlen (suffix)); | |||
375 | } | |||
376 | ||||
377 | /* Pops the top of the prompt stack, and frees the memory allocated for it. */ | |||
378 | void | |||
379 | pop_prompt (void) | |||
380 | { | |||
381 | /* If we are not during a 'synchronous' execution command, in which | |||
382 | case, the top prompt would be empty. */ | |||
383 | if (strcmp (PROMPT (0)the_prompts.prompt_stack[the_prompts.top + 0].prompt, "")) | |||
384 | /* This is for the case in which the prompt is set while the | |||
385 | annotation level is 2. The top prompt will be changed, but when | |||
386 | we return to annotation level < 2, we want that new prompt to be | |||
387 | in effect, until the user does another 'set prompt'. */ | |||
388 | if (strcmp (PROMPT (0)the_prompts.prompt_stack[the_prompts.top + 0].prompt, PROMPT (-1)the_prompts.prompt_stack[the_prompts.top + -1].prompt)) | |||
389 | { | |||
390 | xfree (PROMPT (-1)the_prompts.prompt_stack[the_prompts.top + -1].prompt); | |||
391 | PROMPT (-1)the_prompts.prompt_stack[the_prompts.top + -1].prompt = savestring (PROMPT (0)the_prompts.prompt_stack[the_prompts.top + 0].prompt, strlen (PROMPT (0)the_prompts.prompt_stack[the_prompts.top + 0].prompt)); | |||
392 | } | |||
393 | ||||
394 | xfree (PREFIX (0)the_prompts.prompt_stack[the_prompts.top + 0].prefix); | |||
395 | xfree (PROMPT (0)the_prompts.prompt_stack[the_prompts.top + 0].prompt); | |||
396 | xfree (SUFFIX (0)the_prompts.prompt_stack[the_prompts.top + 0].suffix); | |||
397 | the_prompts.top--; | |||
398 | } | |||
399 | ||||
400 | /* When there is an event ready on the stdin file desriptor, instead | |||
401 | of calling readline directly throught the callback function, or | |||
402 | instead of calling gdb_readline2, give gdb a chance to detect | |||
403 | errors and do something. */ | |||
404 | void | |||
405 | stdin_event_handler (int error, gdb_client_data client_data) | |||
406 | { | |||
407 | if (error) | |||
408 | { | |||
409 | printf_unfiltered ("error detected on stdin\n"); | |||
410 | delete_file_handler (input_fd); | |||
411 | discard_all_continuations (); | |||
412 | /* If stdin died, we may as well kill gdb. */ | |||
413 | quit_command ((char *) 0, stdin(&__sF[0]) == instream); | |||
414 | } | |||
415 | else | |||
416 | (*call_readline) (client_data); | |||
417 | } | |||
418 | ||||
419 | /* Re-enable stdin after the end of an execution command in | |||
420 | synchronous mode, or after an error from the target, and we aborted | |||
421 | the exec operation. */ | |||
422 | ||||
423 | void | |||
424 | async_enable_stdin (void *dummy) | |||
425 | { | |||
426 | /* See NOTE in async_disable_stdin() */ | |||
427 | /* FIXME: cagney/1999-09-27: Call this before clearing | |||
428 | sync_execution. Current target_terminal_ours() implementations | |||
429 | check for sync_execution before switching the terminal. */ | |||
430 | target_terminal_ours ()(*current_target.to_terminal_ours) (); | |||
431 | pop_prompt (); | |||
432 | sync_execution = 0; | |||
433 | } | |||
434 | ||||
435 | /* Disable reads from stdin (the console) marking the command as | |||
436 | synchronous. */ | |||
437 | ||||
438 | void | |||
439 | async_disable_stdin (void) | |||
440 | { | |||
441 | sync_execution = 1; | |||
442 | push_prompt ("", "", ""); | |||
443 | /* FIXME: cagney/1999-09-27: At present this call is technically | |||
444 | redundant since infcmd.c and infrun.c both already call | |||
445 | target_terminal_inferior(). As the terminal handling (in | |||
446 | sync/async mode) is refined, the duplicate calls can be | |||
447 | eliminated (Here or in infcmd.c/infrun.c). */ | |||
448 | target_terminal_inferior ()(*current_target.to_terminal_inferior) (); | |||
449 | /* Add the reinstate of stdin to the list of cleanups to be done | |||
450 | in case the target errors out and dies. These cleanups are also | |||
451 | done in case of normal successful termination of the execution | |||
452 | command, by complete_execution(). */ | |||
453 | make_exec_error_cleanup (async_enable_stdin, NULL((void*)0)); | |||
454 | } | |||
455 | ||||
456 | ||||
457 | /* Handles a gdb command. This function is called by | |||
458 | command_line_handler, which has processed one or more input lines | |||
459 | into COMMAND. */ | |||
460 | /* NOTE: 1999-04-30 This is the asynchronous version of the command_loop | |||
461 | function. The command_loop function will be obsolete when we | |||
462 | switch to use the event loop at every execution of gdb. */ | |||
463 | static void | |||
464 | command_handler (char *command) | |||
465 | { | |||
466 | struct cleanup *old_chain; | |||
467 | int stdin_is_tty = ISATTY (stdin)(isatty ((!__isthreaded ? (((&__sF[0]))->_file) : (fileno )((&__sF[0]))))); | |||
468 | struct continuation_arg *arg1; | |||
469 | struct continuation_arg *arg2; | |||
470 | long time_at_cmd_start; | |||
471 | #ifdef HAVE_SBRK1 | |||
472 | long space_at_cmd_start = 0; | |||
473 | #endif | |||
474 | extern int display_time; | |||
475 | extern int display_space; | |||
476 | ||||
477 | quit_flag = 0; | |||
478 | if (instream == stdin(&__sF[0]) && stdin_is_tty) | |||
479 | reinitialize_more_filter (); | |||
480 | old_chain = make_cleanup (null_cleanup, 0); | |||
481 | ||||
482 | /* If readline returned a NULL command, it means that the | |||
483 | connection with the terminal is gone. This happens at the | |||
484 | end of a testsuite run, after Expect has hung up | |||
485 | but GDB is still alive. In such a case, we just quit gdb | |||
486 | killing the inferior program too. */ | |||
487 | if (command == 0) | |||
488 | quit_command ((char *) 0, stdin(&__sF[0]) == instream); | |||
489 | ||||
490 | time_at_cmd_start = get_run_time (); | |||
491 | ||||
492 | if (display_space) | |||
493 | { | |||
494 | #ifdef HAVE_SBRK1 | |||
495 | char *lim = (char *) sbrk (0); | |||
496 | space_at_cmd_start = lim - lim_at_start; | |||
497 | #endif | |||
498 | } | |||
499 | ||||
500 | execute_command (command, instream == stdin(&__sF[0])); | |||
501 | ||||
502 | /* Set things up for this function to be compete later, once the | |||
503 | execution has completed, if we are doing an execution command, | |||
504 | otherwise, just go ahead and finish. */ | |||
505 | if (target_can_async_p ()(current_target.to_can_async_p ()) && target_executing) | |||
506 | { | |||
507 | arg1 = | |||
508 | (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg)); | |||
509 | arg2 = | |||
510 | (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg)); | |||
511 | arg1->next = arg2; | |||
512 | arg2->next = NULL((void*)0); | |||
513 | arg1->data.longint = time_at_cmd_start; | |||
514 | #ifdef HAVE_SBRK1 | |||
515 | arg2->data.longint = space_at_cmd_start; | |||
516 | #endif | |||
517 | add_continuation (command_line_handler_continuation, arg1); | |||
518 | } | |||
519 | ||||
520 | /* Do any commands attached to breakpoint we stopped at. Only if we | |||
521 | are always running synchronously. Or if we have just executed a | |||
522 | command that doesn't start the target. */ | |||
523 | if (!target_can_async_p ()(current_target.to_can_async_p ()) || !target_executing) | |||
524 | { | |||
525 | bpstat_do_actions (&stop_bpstat); | |||
526 | do_cleanups (old_chain); | |||
527 | ||||
528 | if (display_time) | |||
529 | { | |||
530 | long cmd_time = get_run_time () - time_at_cmd_start; | |||
531 | ||||
532 | printf_unfiltered ("Command execution time: %ld.%06ld\n", | |||
533 | cmd_time / 1000000, cmd_time % 1000000); | |||
534 | } | |||
535 | ||||
536 | if (display_space) | |||
537 | { | |||
538 | #ifdef HAVE_SBRK1 | |||
539 | char *lim = (char *) sbrk (0); | |||
540 | long space_now = lim - lim_at_start; | |||
541 | long space_diff = space_now - space_at_cmd_start; | |||
542 | ||||
543 | printf_unfiltered ("Space used: %ld (%c%ld for this command)\n", | |||
544 | space_now, | |||
545 | (space_diff >= 0 ? '+' : '-'), | |||
546 | space_diff); | |||
547 | #endif | |||
548 | } | |||
549 | } | |||
550 | } | |||
551 | ||||
552 | /* Do any commands attached to breakpoint we stopped at. Only if we | |||
553 | are always running synchronously. Or if we have just executed a | |||
554 | command that doesn't start the target. */ | |||
555 | void | |||
556 | command_line_handler_continuation (struct continuation_arg *arg) | |||
557 | { | |||
558 | extern int display_time; | |||
559 | extern int display_space; | |||
560 | ||||
561 | long time_at_cmd_start = arg->data.longint; | |||
562 | long space_at_cmd_start = arg->next->data.longint; | |||
563 | ||||
564 | bpstat_do_actions (&stop_bpstat); | |||
565 | /*do_cleanups (old_chain); *//*?????FIXME????? */ | |||
566 | ||||
567 | if (display_time) | |||
568 | { | |||
569 | long cmd_time = get_run_time () - time_at_cmd_start; | |||
570 | ||||
571 | printf_unfiltered ("Command execution time: %ld.%06ld\n", | |||
572 | cmd_time / 1000000, cmd_time % 1000000); | |||
573 | } | |||
574 | if (display_space) | |||
575 | { | |||
576 | #ifdef HAVE_SBRK1 | |||
577 | char *lim = (char *) sbrk (0); | |||
578 | long space_now = lim - lim_at_start; | |||
579 | long space_diff = space_now - space_at_cmd_start; | |||
580 | ||||
581 | printf_unfiltered ("Space used: %ld (%c%ld for this command)\n", | |||
582 | space_now, | |||
583 | (space_diff >= 0 ? '+' : '-'), | |||
584 | space_diff); | |||
585 | #endif | |||
586 | } | |||
587 | } | |||
588 | ||||
589 | /* Handle a complete line of input. This is called by the callback | |||
590 | mechanism within the readline library. Deal with incomplete commands | |||
591 | as well, by saving the partial input in a global buffer. */ | |||
592 | ||||
593 | /* NOTE: 1999-04-30 This is the asynchronous version of the | |||
594 | command_line_input function. command_line_input will become | |||
595 | obsolete once we use the event loop as the default mechanism in | |||
596 | GDB. */ | |||
597 | static void | |||
598 | command_line_handler (char *rl) | |||
599 | { | |||
600 | static char *linebuffer = 0; | |||
601 | static unsigned linelength = 0; | |||
602 | char *p; | |||
603 | char *p1; | |||
604 | extern char *line; | |||
605 | extern int linesize; | |||
606 | char *nline; | |||
607 | char got_eof = 0; | |||
608 | ||||
609 | ||||
610 | int repeat = (instream == stdin(&__sF[0])); | |||
611 | ||||
612 | if (annotation_level > 1 && instream == stdin(&__sF[0])) | |||
| ||||
613 | { | |||
614 | printf_unfiltered ("\n\032\032post-"); | |||
615 | puts_unfiltered (async_annotation_suffix); | |||
616 | printf_unfiltered ("\n"); | |||
617 | } | |||
618 | ||||
619 | if (linebuffer
| |||
620 | { | |||
621 | linelength = 80; | |||
622 | linebuffer = (char *) xmalloc (linelength); | |||
623 | } | |||
624 | ||||
625 | p = linebuffer; | |||
626 | ||||
627 | if (more_to_come) | |||
628 | { | |||
629 | strcpy (linebuffer, readline_input_state.linebuffer); | |||
630 | p = readline_input_state.linebuffer_ptr; | |||
631 | xfree (readline_input_state.linebuffer); | |||
632 | more_to_come = 0; | |||
633 | pop_prompt (); | |||
634 | } | |||
635 | ||||
636 | #ifdef STOP_SIGNAL18 | |||
637 | if (job_control) | |||
638 | signal (STOP_SIGNAL18, handle_stop_sig); | |||
639 | #endif | |||
640 | ||||
641 | /* Make sure that all output has been output. Some machines may let | |||
642 | you get away with leaving out some of the gdb_flush, but not all. */ | |||
643 | wrap_here (""); | |||
644 | gdb_flush (gdb_stdout); | |||
645 | gdb_flush (gdb_stderr); | |||
646 | ||||
647 | if (source_file_name != NULL((void*)0)) | |||
648 | { | |||
649 | ++source_line_number; | |||
650 | sprintf (source_error, | |||
651 | "%s%s:%d: Error in sourced command file:\n", | |||
652 | source_pre_error, | |||
653 | source_file_name, | |||
654 | source_line_number); | |||
655 | error_pre_print = source_error; | |||
656 | } | |||
657 | ||||
658 | /* If we are in this case, then command_handler will call quit | |||
659 | and exit from gdb. */ | |||
660 | if (!rl || rl == (char *) EOF(-1)) | |||
661 | { | |||
662 | got_eof = 1; | |||
663 | command_handler (0); | |||
664 | } | |||
665 | if (strlen (rl) + 1 + (p - linebuffer) > linelength) | |||
666 | { | |||
667 | linelength = strlen (rl) + 1 + (p - linebuffer); | |||
668 | nline = (char *) xrealloc (linebuffer, linelength); | |||
669 | p += nline - linebuffer; | |||
670 | linebuffer = nline; | |||
671 | } | |||
672 | p1 = rl; | |||
673 | /* Copy line. Don't copy null at end. (Leaves line alone | |||
674 | if this was just a newline) */ | |||
675 | while (*p1) | |||
| ||||
676 | *p++ = *p1++; | |||
677 | ||||
678 | xfree (rl); /* Allocated in readline. */ | |||
679 | ||||
680 | if (p > linebuffer && *(p - 1) == '\\') | |||
681 | { | |||
682 | p--; /* Put on top of '\'. */ | |||
683 | ||||
684 | readline_input_state.linebuffer = savestring (linebuffer, | |||
685 | strlen (linebuffer)); | |||
686 | readline_input_state.linebuffer_ptr = p; | |||
687 | ||||
688 | /* We will not invoke a execute_command if there is more | |||
689 | input expected to complete the command. So, we need to | |||
690 | print an empty prompt here. */ | |||
691 | more_to_come = 1; | |||
692 | push_prompt ("", "", ""); | |||
693 | display_gdb_prompt (0); | |||
694 | return; | |||
695 | } | |||
696 | ||||
697 | #ifdef STOP_SIGNAL18 | |||
698 | if (job_control) | |||
699 | signal (STOP_SIGNAL18, SIG_DFL(void (*)(int))0); | |||
700 | #endif | |||
701 | ||||
702 | #define SERVER_COMMAND_LENGTH7 7 | |||
703 | server_command = | |||
704 | (p - linebuffer > SERVER_COMMAND_LENGTH7) | |||
705 | && strncmp (linebuffer, "server ", SERVER_COMMAND_LENGTH7) == 0; | |||
706 | if (server_command) | |||
707 | { | |||
708 | /* Note that we don't set `line'. Between this and the check in | |||
709 | dont_repeat, this insures that repeating will still do the | |||
710 | right thing. */ | |||
711 | *p = '\0'; | |||
712 | command_handler (linebuffer + SERVER_COMMAND_LENGTH7); | |||
713 | display_gdb_prompt (0); | |||
714 | return; | |||
715 | } | |||
716 | ||||
717 | /* Do history expansion if that is wished. */ | |||
718 | if (history_expansion_p && instream == stdin(&__sF[0]) | |||
719 | && ISATTY (instream)(isatty ((!__isthreaded ? ((instream)->_file) : (fileno)(instream ))))) | |||
720 | { | |||
721 | char *history_value; | |||
722 | int expanded; | |||
723 | ||||
724 | *p = '\0'; /* Insert null now. */ | |||
725 | expanded = history_expand (linebuffer, &history_value); | |||
726 | if (expanded) | |||
727 | { | |||
728 | /* Print the changes. */ | |||
729 | printf_unfiltered ("%s\n", history_value); | |||
730 | ||||
731 | /* If there was an error, call this function again. */ | |||
732 | if (expanded < 0) | |||
733 | { | |||
734 | xfree (history_value); | |||
735 | return; | |||
736 | } | |||
737 | if (strlen (history_value) > linelength) | |||
738 | { | |||
739 | linelength = strlen (history_value) + 1; | |||
740 | linebuffer = (char *) xrealloc (linebuffer, linelength); | |||
741 | } | |||
742 | strcpy (linebuffer, history_value); | |||
743 | p = linebuffer + strlen (linebuffer); | |||
744 | xfree (history_value); | |||
745 | } | |||
746 | } | |||
747 | ||||
748 | /* If we just got an empty line, and that is supposed | |||
749 | to repeat the previous command, return the value in the | |||
750 | global buffer. */ | |||
751 | if (repeat && p == linebuffer && *p != '\\') | |||
752 | { | |||
753 | command_handler (line); | |||
754 | display_gdb_prompt (0); | |||
755 | return; | |||
756 | } | |||
757 | ||||
758 | for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++); | |||
759 | if (repeat && !*p1) | |||
760 | { | |||
761 | command_handler (line); | |||
762 | display_gdb_prompt (0); | |||
763 | return; | |||
764 | } | |||
765 | ||||
766 | *p = 0; | |||
767 | ||||
768 | /* Add line to history if appropriate. */ | |||
769 | if (instream == stdin(&__sF[0]) | |||
770 | && ISATTY (stdin)(isatty ((!__isthreaded ? (((&__sF[0]))->_file) : (fileno )((&__sF[0]))))) && *linebuffer) | |||
771 | add_history (linebuffer); | |||
772 | ||||
773 | /* Note: lines consisting solely of comments are added to the command | |||
774 | history. This is useful when you type a command, and then | |||
775 | realize you don't want to execute it quite yet. You can comment | |||
776 | out the command and then later fetch it from the value history | |||
777 | and remove the '#'. The kill ring is probably better, but some | |||
778 | people are in the habit of commenting things out. */ | |||
779 | if (*p1 == '#') | |||
780 | *p1 = '\0'; /* Found a comment. */ | |||
781 | ||||
782 | /* Save into global buffer if appropriate. */ | |||
783 | if (repeat) | |||
784 | { | |||
785 | if (linelength > linesize) | |||
786 | { | |||
787 | line = xrealloc (line, linelength); | |||
788 | linesize = linelength; | |||
789 | } | |||
790 | strcpy (line, linebuffer); | |||
791 | if (!more_to_come) | |||
792 | { | |||
793 | command_handler (line); | |||
794 | display_gdb_prompt (0); | |||
795 | } | |||
796 | return; | |||
797 | } | |||
798 | ||||
799 | command_handler (linebuffer); | |||
800 | display_gdb_prompt (0); | |||
801 | return; | |||
802 | } | |||
803 | ||||
804 | /* Does reading of input from terminal w/o the editing features | |||
805 | provided by the readline library. */ | |||
806 | ||||
807 | /* NOTE: 1999-04-30 Asynchronous version of gdb_readline. gdb_readline | |||
808 | will become obsolete when the event loop is made the default | |||
809 | execution for gdb. */ | |||
810 | void | |||
811 | gdb_readline2 (gdb_client_data client_data) | |||
812 | { | |||
813 | int c; | |||
814 | char *result; | |||
815 | int input_index = 0; | |||
816 | int result_size = 80; | |||
817 | static int done_once = 0; | |||
818 | ||||
819 | /* Unbuffer the input stream, so that, later on, the calls to fgetc | |||
820 | fetch only one char at the time from the stream. The fgetc's will | |||
821 | get up to the first newline, but there may be more chars in the | |||
822 | stream after '\n'. If we buffer the input and fgetc drains the | |||
823 | stream, getting stuff beyond the newline as well, a select, done | |||
824 | afterwards will not trigger. */ | |||
825 | if (!done_once && !ISATTY (instream)(isatty ((!__isthreaded ? ((instream)->_file) : (fileno)(instream ))))) | |||
826 | { | |||
827 | setbuf (instream, NULL((void*)0)); | |||
828 | done_once = 1; | |||
829 | } | |||
830 | ||||
831 | result = (char *) xmalloc (result_size); | |||
832 | ||||
833 | /* We still need the while loop here, even though it would seem | |||
834 | obvious to invoke gdb_readline2 at every character entered. If | |||
835 | not using the readline library, the terminal is in cooked mode, | |||
836 | which sends the characters all at once. Poll will notice that the | |||
837 | input fd has changed state only after enter is pressed. At this | |||
838 | point we still need to fetch all the chars entered. */ | |||
839 | ||||
840 | while (1) | |||
841 | { | |||
842 | /* Read from stdin if we are executing a user defined command. | |||
843 | This is the right thing for prompt_for_continue, at least. */ | |||
844 | c = fgetc (instream ? instream : stdin(&__sF[0])); | |||
845 | ||||
846 | if (c == EOF(-1)) | |||
847 | { | |||
848 | if (input_index > 0) | |||
849 | /* The last line does not end with a newline. Return it, and | |||
850 | if we are called again fgetc will still return EOF and | |||
851 | we'll return NULL then. */ | |||
852 | break; | |||
853 | xfree (result); | |||
854 | (*input_handler) (0); | |||
855 | } | |||
856 | ||||
857 | if (c == '\n') | |||
858 | { | |||
859 | if (input_index > 0 && result[input_index - 1] == '\r') | |||
860 | input_index--; | |||
861 | break; | |||
862 | } | |||
863 | ||||
864 | result[input_index++] = c; | |||
865 | while (input_index >= result_size) | |||
866 | { | |||
867 | result_size *= 2; | |||
868 | result = (char *) xrealloc (result, result_size); | |||
869 | } | |||
870 | } | |||
871 | ||||
872 | result[input_index++] = '\0'; | |||
873 | (*input_handler) (result); | |||
874 | } | |||
875 | ||||
876 | ||||
877 | /* Initialization of signal handlers and tokens. There is a function | |||
878 | handle_sig* for each of the signals GDB cares about. Specifically: | |||
879 | SIGINT, SIGFPE, SIGQUIT, SIGTSTP, SIGHUP, SIGWINCH. These | |||
880 | functions are the actual signal handlers associated to the signals | |||
881 | via calls to signal(). The only job for these functions is to | |||
882 | enqueue the appropriate event/procedure with the event loop. Such | |||
883 | procedures are the old signal handlers. The event loop will take | |||
884 | care of invoking the queued procedures to perform the usual tasks | |||
885 | associated with the reception of the signal. */ | |||
886 | /* NOTE: 1999-04-30 This is the asynchronous version of init_signals. | |||
887 | init_signals will become obsolete as we move to have to event loop | |||
888 | as the default for gdb. */ | |||
889 | void | |||
890 | async_init_signals (void) | |||
891 | { | |||
892 | signal (SIGINT2, handle_sigint); | |||
893 | sigint_token = | |||
894 | create_async_signal_handler (async_request_quit, NULL((void*)0)); | |||
895 | ||||
896 | /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed | |||
897 | to the inferior and breakpoints will be ignored. */ | |||
898 | #ifdef SIGTRAP5 | |||
899 | signal (SIGTRAP5, SIG_DFL(void (*)(int))0); | |||
900 | #endif | |||
901 | ||||
902 | /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get | |||
903 | passed to the inferior, which we don't want. It would be | |||
904 | possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but | |||
905 | on BSD4.3 systems using vfork, that can affect the | |||
906 | GDB process as well as the inferior (the signal handling tables | |||
907 | might be in memory, shared between the two). Since we establish | |||
908 | a handler for SIGQUIT, when we call exec it will set the signal | |||
909 | to SIG_DFL for us. */ | |||
910 | signal (SIGQUIT3, handle_sigquit); | |||
911 | sigquit_token = | |||
912 | create_async_signal_handler (async_do_nothing, NULL((void*)0)); | |||
913 | #ifdef SIGHUP1 | |||
914 | if (signal (SIGHUP1, handle_sighup) != SIG_IGN(void (*)(int))1) | |||
915 | sighup_token = | |||
916 | create_async_signal_handler (async_disconnect, NULL((void*)0)); | |||
917 | else | |||
918 | sighup_token = | |||
919 | create_async_signal_handler (async_do_nothing, NULL((void*)0)); | |||
920 | #endif | |||
921 | signal (SIGFPE8, handle_sigfpe); | |||
922 | sigfpe_token = | |||
923 | create_async_signal_handler (async_float_handler, NULL((void*)0)); | |||
924 | ||||
925 | #if defined(SIGWINCH28) && defined(SIGWINCH_HANDLER) | |||
926 | signal (SIGWINCH28, handle_sigwinch); | |||
927 | sigwinch_token = | |||
928 | create_async_signal_handler (SIGWINCH_HANDLER, NULL((void*)0)); | |||
929 | #endif | |||
930 | #ifdef STOP_SIGNAL18 | |||
931 | sigtstp_token = | |||
932 | create_async_signal_handler (async_stop_sig, NULL((void*)0)); | |||
933 | #endif | |||
934 | ||||
935 | } | |||
936 | ||||
937 | void | |||
938 | mark_async_signal_handler_wrapper (void *token) | |||
939 | { | |||
940 | mark_async_signal_handler ((struct async_signal_handler *) token); | |||
941 | } | |||
942 | ||||
943 | /* Tell the event loop what to do if SIGINT is received. | |||
944 | See event-signal.c. */ | |||
945 | void | |||
946 | handle_sigint (int sig) | |||
947 | { | |||
948 | signal (sig, handle_sigint); | |||
949 | ||||
950 | /* If immediate_quit is set, we go ahead and process the SIGINT right | |||
951 | away, even if we usually would defer this to the event loop. The | |||
952 | assumption here is that it is safe to process ^C immediately if | |||
953 | immediate_quit is set. If we didn't, SIGINT would be really | |||
954 | processed only the next time through the event loop. To get to | |||
955 | that point, though, the command that we want to interrupt needs to | |||
956 | finish first, which is unacceptable. */ | |||
957 | if (immediate_quit) | |||
958 | async_request_quit (0); | |||
959 | else | |||
960 | /* If immediate quit is not set, we process SIGINT the next time | |||
961 | through the loop, which is fine. */ | |||
962 | mark_async_signal_handler_wrapper (sigint_token); | |||
963 | } | |||
964 | ||||
965 | /* Do the quit. All the checks have been done by the caller. */ | |||
966 | void | |||
967 | async_request_quit (gdb_client_data arg) | |||
968 | { | |||
969 | quit_flag = 1; | |||
970 | quit (); | |||
971 | } | |||
972 | ||||
973 | /* Tell the event loop what to do if SIGQUIT is received. | |||
974 | See event-signal.c. */ | |||
975 | static void | |||
976 | handle_sigquit (int sig) | |||
977 | { | |||
978 | mark_async_signal_handler_wrapper (sigquit_token); | |||
979 | signal (sig, handle_sigquit); | |||
980 | } | |||
981 | ||||
982 | /* Called by the event loop in response to a SIGQUIT. */ | |||
983 | static void | |||
984 | async_do_nothing (gdb_client_data arg) | |||
985 | { | |||
986 | /* Empty function body. */ | |||
987 | } | |||
988 | ||||
989 | #ifdef SIGHUP1 | |||
990 | /* Tell the event loop what to do if SIGHUP is received. | |||
991 | See event-signal.c. */ | |||
992 | static void | |||
993 | handle_sighup (int sig) | |||
994 | { | |||
995 | mark_async_signal_handler_wrapper (sighup_token); | |||
996 | signal (sig, handle_sighup); | |||
997 | } | |||
998 | ||||
999 | /* Called by the event loop to process a SIGHUP */ | |||
1000 | static void | |||
1001 | async_disconnect (gdb_client_data arg) | |||
1002 | { | |||
1003 | catch_errors (quit_cover, NULL((void*)0), | |||
1004 | "Could not kill the program being debugged", | |||
1005 | RETURN_MASK_ALL((1 << (int)(-RETURN_QUIT)) | (1 << (int)(-RETURN_ERROR )))); | |||
1006 | signal (SIGHUP1, SIG_DFL(void (*)(int))0); /*FIXME: ??????????? */ | |||
1007 | kill (getpid (), SIGHUP1); | |||
1008 | } | |||
1009 | #endif | |||
1010 | ||||
1011 | #ifdef STOP_SIGNAL18 | |||
1012 | void | |||
1013 | handle_stop_sig (int sig) | |||
1014 | { | |||
1015 | mark_async_signal_handler_wrapper (sigtstp_token); | |||
1016 | signal (sig, handle_stop_sig); | |||
1017 | } | |||
1018 | ||||
1019 | static void | |||
1020 | async_stop_sig (gdb_client_data arg) | |||
1021 | { | |||
1022 | char *prompt = get_prompt (); | |||
1023 | #if STOP_SIGNAL18 == SIGTSTP18 | |||
1024 | signal (SIGTSTP18, SIG_DFL(void (*)(int))0); | |||
1025 | #if HAVE_SIGPROCMASK1 | |||
1026 | { | |||
1027 | sigset_t zero; | |||
1028 | ||||
1029 | sigemptyset (&zero); | |||
1030 | sigprocmask (SIG_SETMASK3, &zero, 0); | |||
1031 | } | |||
1032 | #elif HAVE_SIGSETMASK1 | |||
1033 | sigsetmask (0); | |||
1034 | #endif | |||
1035 | kill (getpid (), SIGTSTP18); | |||
1036 | signal (SIGTSTP18, handle_stop_sig); | |||
1037 | #else | |||
1038 | signal (STOP_SIGNAL18, handle_stop_sig); | |||
1039 | #endif | |||
1040 | printf_unfiltered ("%s", prompt); | |||
1041 | gdb_flush (gdb_stdout); | |||
1042 | ||||
1043 | /* Forget about any previous command -- null line now will do nothing. */ | |||
1044 | dont_repeat (); | |||
1045 | } | |||
1046 | #endif /* STOP_SIGNAL */ | |||
1047 | ||||
1048 | /* Tell the event loop what to do if SIGFPE is received. | |||
1049 | See event-signal.c. */ | |||
1050 | static void | |||
1051 | handle_sigfpe (int sig) | |||
1052 | { | |||
1053 | mark_async_signal_handler_wrapper (sigfpe_token); | |||
1054 | signal (sig, handle_sigfpe); | |||
1055 | } | |||
1056 | ||||
1057 | /* Event loop will call this functin to process a SIGFPE. */ | |||
1058 | static void | |||
1059 | async_float_handler (gdb_client_data arg) | |||
1060 | { | |||
1061 | /* This message is based on ANSI C, section 4.7. Note that integer | |||
1062 | divide by zero causes this, so "float" is a misnomer. */ | |||
1063 | error ("Erroneous arithmetic operation."); | |||
1064 | } | |||
1065 | ||||
1066 | /* Tell the event loop what to do if SIGWINCH is received. | |||
1067 | See event-signal.c. */ | |||
1068 | #if defined(SIGWINCH28) && defined(SIGWINCH_HANDLER) | |||
1069 | static void | |||
1070 | handle_sigwinch (int sig) | |||
1071 | { | |||
1072 | mark_async_signal_handler_wrapper (sigwinch_token); | |||
1073 | signal (sig, handle_sigwinch); | |||
1074 | } | |||
1075 | #endif | |||
1076 | ||||
1077 | ||||
1078 | /* Called by do_setshow_command. */ | |||
1079 | void | |||
1080 | set_async_editing_command (char *args, int from_tty, struct cmd_list_element *c) | |||
1081 | { | |||
1082 | change_line_handler (); | |||
1083 | } | |||
1084 | ||||
1085 | /* Called by do_setshow_command. */ | |||
1086 | void | |||
1087 | set_async_annotation_level (char *args, int from_tty, struct cmd_list_element *c) | |||
1088 | { | |||
1089 | change_annotation_level (); | |||
1090 | } | |||
1091 | ||||
1092 | /* Called by do_setshow_command. */ | |||
1093 | void | |||
1094 | set_async_prompt (char *args, int from_tty, struct cmd_list_element *c) | |||
1095 | { | |||
1096 | PROMPT (0)the_prompts.prompt_stack[the_prompts.top + 0].prompt = savestring (new_async_prompt, strlen (new_async_prompt)); | |||
1097 | } | |||
1098 | ||||
1099 | /* Set things up for readline to be invoked via the alternate | |||
1100 | interface, i.e. via a callback function (rl_callback_read_char), | |||
1101 | and hook up instream to the event loop. */ | |||
1102 | void | |||
1103 | gdb_setup_readline (void) | |||
1104 | { | |||
1105 | /* This function is a noop for the sync case. The assumption is | |||
1106 | that the sync setup is ALL done in gdb_init, and we would only | |||
1107 | mess it up here. The sync stuff should really go away over | |||
1108 | time. */ | |||
1109 | ||||
1110 | gdb_stdout = stdio_fileopen (stdout(&__sF[1])); | |||
1111 | gdb_stderr = stdio_fileopen (stderr(&__sF[2])); | |||
1112 | gdb_stdlog = gdb_stderr; /* for moment */ | |||
1113 | gdb_stdtarg = gdb_stderr; /* for moment */ | |||
1114 | ||||
1115 | /* If the input stream is connected to a terminal, turn on | |||
1116 | editing. */ | |||
1117 | if (ISATTY (instream)(isatty ((!__isthreaded ? ((instream)->_file) : (fileno)(instream ))))) | |||
1118 | { | |||
1119 | /* Tell gdb that we will be using the readline library. This | |||
1120 | could be overwritten by a command in .gdbinit like 'set | |||
1121 | editing on' or 'off'. */ | |||
1122 | async_command_editing_p = 1; | |||
1123 | ||||
1124 | /* When a character is detected on instream by select or poll, | |||
1125 | readline will be invoked via this callback function. */ | |||
1126 | call_readline = rl_callback_read_char_wrapper; | |||
1127 | } | |||
1128 | else | |||
1129 | { | |||
1130 | async_command_editing_p = 0; | |||
1131 | call_readline = gdb_readline2; | |||
1132 | } | |||
1133 | ||||
1134 | /* When readline has read an end-of-line character, it passes the | |||
1135 | complete line to gdb for processing. command_line_handler is the | |||
1136 | function that does this. */ | |||
1137 | input_handler = command_line_handler; | |||
1138 | ||||
1139 | /* Tell readline to use the same input stream that gdb uses. */ | |||
1140 | rl_instream = instream; | |||
1141 | ||||
1142 | /* Get a file descriptor for the input stream, so that we can | |||
1143 | register it with the event loop. */ | |||
1144 | input_fd = fileno (instream)(!__isthreaded ? ((instream)->_file) : (fileno)(instream)); | |||
1145 | ||||
1146 | /* Now we need to create the event sources for the input file | |||
1147 | descriptor. */ | |||
1148 | /* At this point in time, this is the only event source that we | |||
1149 | register with the even loop. Another source is going to be the | |||
1150 | target program (inferior), but that must be registered only when | |||
1151 | it actually exists (I.e. after we say 'run' or after we connect | |||
1152 | to a remote target. */ | |||
1153 | add_file_handler (input_fd, stdin_event_handler, 0); | |||
1154 | } | |||
1155 | ||||
1156 | /* Disable command input through the standard CLI channels. Used in | |||
1157 | the suspend proc for interpreters that use the standard gdb readline | |||
1158 | interface, like the cli & the mi. */ | |||
1159 | void | |||
1160 | gdb_disable_readline (void) | |||
1161 | { | |||
1162 | /* FIXME - It is too heavyweight to delete and remake these every | |||
1163 | time you run an interpreter that needs readline. It is probably | |||
1164 | better to have the interpreters cache these, which in turn means | |||
1165 | that this needs to be moved into interpreter specific code. */ | |||
1166 | ||||
1167 | #if 0 | |||
1168 | ui_file_delete (gdb_stdout); | |||
1169 | ui_file_delete (gdb_stderr); | |||
1170 | gdb_stdlog = NULL((void*)0); | |||
1171 | gdb_stdtarg = NULL((void*)0); | |||
1172 | #endif | |||
1173 | ||||
1174 | rl_callback_handler_remove (); | |||
1175 | delete_file_handler (input_fd); | |||
1176 | } |