Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Top level stuff for GDB, the GNU debugger. |
a752853e AC |
2 | |
3 | Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, | |
0bc2134e | 4 | 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 |
a752853e | 5 | Free Software Foundation, Inc. |
c906108c | 6 | |
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b JM |
19 | You should have received a copy of the GNU General Public License |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 59 Temple Place - Suite 330, | |
22 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
23 | |
24 | #include "defs.h" | |
25 | #include "gdbcmd.h" | |
26 | #include "call-cmds.h" | |
210661e7 EZ |
27 | #include "cli/cli-cmds.h" |
28 | #include "cli/cli-script.h" | |
29 | #include "cli/cli-setshow.h" | |
18a642a1 | 30 | #include "cli/cli-decode.h" |
c906108c SS |
31 | #include "symtab.h" |
32 | #include "inferior.h" | |
042be3a9 | 33 | #include <signal.h> |
c906108c SS |
34 | #include "target.h" |
35 | #include "breakpoint.h" | |
36 | #include "gdbtypes.h" | |
37 | #include "expression.h" | |
38 | #include "value.h" | |
39 | #include "language.h" | |
c5aa993b | 40 | #include "terminal.h" /* For job_control. */ |
c906108c | 41 | #include "annotate.h" |
c5f0f3d0 | 42 | #include "completer.h" |
c906108c | 43 | #include "top.h" |
d4f3574e | 44 | #include "version.h" |
210661e7 | 45 | #include "serial.h" |
d16aafd8 | 46 | #include "doublest.h" |
f9c696d2 | 47 | #include "gdb_assert.h" |
c906108c SS |
48 | |
49 | /* readline include files */ | |
dbda9972 AC |
50 | #include "readline/readline.h" |
51 | #include "readline/history.h" | |
c906108c SS |
52 | |
53 | /* readline defines this. */ | |
54 | #undef savestring | |
55 | ||
56 | #include <sys/types.h> | |
c906108c | 57 | |
c4093a6a | 58 | #include <setjmp.h> |
2acceee2 | 59 | |
c2c6d25f | 60 | #include "event-top.h" |
c906108c SS |
61 | #include "gdb_string.h" |
62 | #include "gdb_stat.h" | |
63 | #include <ctype.h> | |
8b93c638 JM |
64 | #include "ui-out.h" |
65 | #include "cli-out.h" | |
c906108c | 66 | |
104c1213 JM |
67 | /* Default command line prompt. This is overriden in some configs. */ |
68 | ||
69 | #ifndef DEFAULT_PROMPT | |
70 | #define DEFAULT_PROMPT "(gdb) " | |
c906108c SS |
71 | #endif |
72 | ||
73 | /* Initialization file name for gdb. This is overridden in some configs. */ | |
74 | ||
75 | #ifndef GDBINIT_FILENAME | |
76 | #define GDBINIT_FILENAME ".gdbinit" | |
77 | #endif | |
78 | char gdbinit[] = GDBINIT_FILENAME; | |
79 | ||
80 | int inhibit_gdbinit = 0; | |
81 | ||
82 | /* If nonzero, and GDB has been configured to be able to use windows, | |
83 | attempt to open them upon startup. */ | |
84 | ||
f15ab4a7 | 85 | int use_windows = 0; |
c906108c | 86 | |
c906108c SS |
87 | extern char lang_frame_mismatch_warn[]; /* language.c */ |
88 | ||
89 | /* Flag for whether we want all the "from_tty" gubbish printed. */ | |
90 | ||
c5aa993b | 91 | int caution = 1; /* Default is yes, sigh. */ |
c906108c | 92 | |
c906108c SS |
93 | /* stdio stream that command input is being read from. Set to stdin normally. |
94 | Set by source_command to the file we are sourcing. Set to NULL if we are | |
95 | executing a user-defined command or interacting via a GUI. */ | |
96 | ||
97 | FILE *instream; | |
98 | ||
99 | /* Current working directory. */ | |
100 | ||
101 | char *current_directory; | |
102 | ||
103 | /* The directory name is actually stored here (usually). */ | |
104 | char gdb_dirbuf[1024]; | |
105 | ||
106 | /* Function to call before reading a command, if nonzero. | |
107 | The function receives two args: an input stream, | |
108 | and a prompt string. */ | |
109 | ||
507f3c78 | 110 | void (*window_hook) (FILE *, char *); |
c906108c SS |
111 | |
112 | int epoch_interface; | |
113 | int xgdb_verbose; | |
114 | ||
115 | /* gdb prints this when reading a command interactively */ | |
c5aa993b | 116 | static char *gdb_prompt_string; /* the global prompt string */ |
c906108c SS |
117 | |
118 | /* Buffer used for reading command lines, and the size | |
119 | allocated for it so far. */ | |
120 | ||
121 | char *line; | |
122 | int linesize = 100; | |
123 | ||
124 | /* Nonzero if the current command is modified by "server ". This | |
c2d11a7d | 125 | affects things like recording into the command history, commands |
c906108c SS |
126 | repeating on RETURN, etc. This is so a user interface (emacs, GUI, |
127 | whatever) can issue its own commands and also send along commands | |
128 | from the user, and have the user not notice that the user interface | |
129 | is issuing commands too. */ | |
130 | int server_command; | |
131 | ||
132 | /* Baud rate specified for talking to serial target systems. Default | |
133 | is left as -1, so targets can choose their own defaults. */ | |
134 | /* FIXME: This means that "show remotebaud" and gr_files_info can print -1 | |
135 | or (unsigned int)-1. This is a Bad User Interface. */ | |
136 | ||
137 | int baud_rate = -1; | |
138 | ||
139 | /* Timeout limit for response from target. */ | |
140 | ||
ce808e91 AC |
141 | /* The default value has been changed many times over the years. It |
142 | was originally 5 seconds. But that was thought to be a long time | |
143 | to sit and wait, so it was changed to 2 seconds. That was thought | |
144 | to be plenty unless the connection was going through some terminal | |
145 | server or multiplexer or other form of hairy serial connection. | |
146 | ||
147 | In mid-1996, remote_timeout was moved from remote.c to top.c and | |
148 | it began being used in other remote-* targets. It appears that the | |
149 | default was changed to 20 seconds at that time, perhaps because the | |
85a453d5 | 150 | Renesas E7000 ICE didn't always respond in a timely manner. |
ce808e91 AC |
151 | |
152 | But if 5 seconds is a long time to sit and wait for retransmissions, | |
153 | 20 seconds is far worse. This demonstrates the difficulty of using | |
154 | a single variable for all protocol timeouts. | |
155 | ||
156 | As remote.c is used much more than remote-e7000.c, it was changed | |
157 | back to 2 seconds in 1999. */ | |
158 | ||
159 | int remote_timeout = 2; | |
c906108c SS |
160 | |
161 | /* Non-zero tells remote* modules to output debugging info. */ | |
162 | ||
163 | int remote_debug = 0; | |
164 | ||
43ff13b4 JM |
165 | /* Non-zero means the target is running. Note: this is different from |
166 | saying that there is an active target and we are stopped at a | |
167 | breakpoint, for instance. This is a real indicator whether the | |
168 | target is off and running, which gdb is doing something else. */ | |
169 | int target_executing = 0; | |
170 | ||
c906108c SS |
171 | /* Level of control structure. */ |
172 | static int control_level; | |
173 | ||
6dd77b81 RH |
174 | /* Sbrk location on entry to main. Used for statistics only. */ |
175 | #ifdef HAVE_SBRK | |
176 | char *lim_at_start; | |
177 | #endif | |
178 | ||
c906108c SS |
179 | /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */ |
180 | ||
181 | #ifndef STOP_SIGNAL | |
182 | #ifdef SIGTSTP | |
183 | #define STOP_SIGNAL SIGTSTP | |
a14ed312 | 184 | static void stop_sig (int); |
c906108c SS |
185 | #endif |
186 | #endif | |
187 | ||
c906108c SS |
188 | /* Hooks for alternate command interfaces. */ |
189 | ||
190 | /* Called after most modules have been initialized, but before taking users | |
1ad24239 KS |
191 | command file. |
192 | ||
193 | If the UI fails to initialize and it wants GDB to continue | |
194 | using the default UI, then it should clear this hook before returning. */ | |
c906108c | 195 | |
507f3c78 | 196 | void (*init_ui_hook) (char *argv0); |
7a292a7a SS |
197 | |
198 | /* This hook is called from within gdb's many mini-event loops which could | |
199 | steal control from a real user interface's event loop. It returns | |
200 | non-zero if the user is requesting a detach, zero otherwise. */ | |
201 | ||
507f3c78 | 202 | int (*ui_loop_hook) (int); |
c906108c SS |
203 | |
204 | /* Called instead of command_loop at top level. Can be invoked via | |
b5a2688f | 205 | throw_exception(). */ |
c906108c | 206 | |
507f3c78 | 207 | void (*command_loop_hook) (void); |
c906108c SS |
208 | |
209 | ||
c906108c SS |
210 | /* Called from print_frame_info to list the line we stopped in. */ |
211 | ||
507f3c78 KB |
212 | void (*print_frame_info_listing_hook) (struct symtab * s, int line, |
213 | int stopline, int noerror); | |
c906108c SS |
214 | /* Replaces most of query. */ |
215 | ||
507f3c78 | 216 | int (*query_hook) (const char *, va_list); |
c906108c SS |
217 | |
218 | /* Replaces most of warning. */ | |
219 | ||
507f3c78 | 220 | void (*warning_hook) (const char *, va_list); |
c906108c | 221 | |
c906108c SS |
222 | /* These three functions support getting lines of text from the user. They |
223 | are used in sequence. First readline_begin_hook is called with a text | |
224 | string that might be (for example) a message for the user to type in a | |
225 | sequence of commands to be executed at a breakpoint. If this function | |
226 | calls back to a GUI, it might take this opportunity to pop up a text | |
227 | interaction window with this message. Next, readline_hook is called | |
228 | with a prompt that is emitted prior to collecting the user input. | |
229 | It can be called multiple times. Finally, readline_end_hook is called | |
230 | to notify the GUI that we are done with the interaction window and it | |
231 | can close it. */ | |
232 | ||
507f3c78 KB |
233 | void (*readline_begin_hook) (char *, ...); |
234 | char *(*readline_hook) (char *); | |
235 | void (*readline_end_hook) (void); | |
c906108c SS |
236 | |
237 | /* Called as appropriate to notify the interface of the specified breakpoint | |
238 | conditions. */ | |
239 | ||
507f3c78 KB |
240 | void (*create_breakpoint_hook) (struct breakpoint * bpt); |
241 | void (*delete_breakpoint_hook) (struct breakpoint * bpt); | |
242 | void (*modify_breakpoint_hook) (struct breakpoint * bpt); | |
c906108c | 243 | |
6426a772 JM |
244 | /* Called as appropriate to notify the interface that we have attached |
245 | to or detached from an already running process. */ | |
246 | ||
507f3c78 KB |
247 | void (*attach_hook) (void); |
248 | void (*detach_hook) (void); | |
6426a772 | 249 | |
c906108c SS |
250 | /* Called during long calculations to allow GUI to repair window damage, and to |
251 | check for stop buttons, etc... */ | |
252 | ||
507f3c78 | 253 | void (*interactive_hook) (void); |
c906108c SS |
254 | |
255 | /* Called when the registers have changed, as a hint to a GUI | |
256 | to minimize window update. */ | |
257 | ||
507f3c78 | 258 | void (*registers_changed_hook) (void); |
c906108c SS |
259 | |
260 | /* Tell the GUI someone changed the register REGNO. -1 means | |
261 | that the caller does not know which register changed or | |
c5aa993b | 262 | that several registers have changed (see value_assign). */ |
507f3c78 | 263 | void (*register_changed_hook) (int regno); |
c906108c SS |
264 | |
265 | /* Tell the GUI someone changed LEN bytes of memory at ADDR */ | |
507f3c78 | 266 | void (*memory_changed_hook) (CORE_ADDR addr, int len); |
c906108c SS |
267 | |
268 | /* Called when going to wait for the target. Usually allows the GUI to run | |
269 | while waiting for target events. */ | |
270 | ||
39f77062 KB |
271 | ptid_t (*target_wait_hook) (ptid_t ptid, |
272 | struct target_waitstatus * status); | |
c906108c SS |
273 | |
274 | /* Used by UI as a wrapper around command execution. May do various things | |
275 | like enabling/disabling buttons, etc... */ | |
276 | ||
507f3c78 KB |
277 | void (*call_command_hook) (struct cmd_list_element * c, char *cmd, |
278 | int from_tty); | |
c906108c | 279 | |
96baa820 JM |
280 | /* Called after a `set' command has finished. Is only run if the |
281 | `set' command succeeded. */ | |
282 | ||
eb2f494a | 283 | void (*set_hook) (struct cmd_list_element * c); |
96baa820 | 284 | |
c906108c SS |
285 | /* Called when the current thread changes. Argument is thread id. */ |
286 | ||
507f3c78 | 287 | void (*context_hook) (int id); |
c906108c SS |
288 | |
289 | /* Takes control from error (). Typically used to prevent longjmps out of the | |
290 | middle of the GUI. Usually used in conjunction with a catch routine. */ | |
291 | ||
eb2f494a | 292 | NORETURN void (*error_hook) (void) ATTR_NORETURN; |
c906108c | 293 | \f |
c5aa993b | 294 | |
99eeeb0f ND |
295 | /* One should use catch_errors rather than manipulating these |
296 | directly. */ | |
c4093a6a JM |
297 | #if defined(HAVE_SIGSETJMP) |
298 | #define SIGJMP_BUF sigjmp_buf | |
ae9d9b96 CF |
299 | #define SIGSETJMP(buf) sigsetjmp((buf), 1) |
300 | #define SIGLONGJMP(buf,val) siglongjmp((buf), (val)) | |
c4093a6a JM |
301 | #else |
302 | #define SIGJMP_BUF jmp_buf | |
303 | #define SIGSETJMP(buf) setjmp(buf) | |
ae9d9b96 | 304 | #define SIGLONGJMP(buf,val) longjmp((buf), (val)) |
c4093a6a JM |
305 | #endif |
306 | ||
b5a2688f | 307 | /* Where to go for throw_exception(). */ |
99eeeb0f | 308 | static SIGJMP_BUF *catch_return; |
c906108c | 309 | |
99eeeb0f | 310 | /* Return for reason REASON to the nearest containing catch_errors(). */ |
c906108c | 311 | |
c2d11a7d | 312 | NORETURN void |
b5a2688f | 313 | throw_exception (enum return_reason reason) |
c906108c SS |
314 | { |
315 | quit_flag = 0; | |
316 | immediate_quit = 0; | |
317 | ||
318 | /* Perhaps it would be cleaner to do this via the cleanup chain (not sure | |
319 | I can think of a reason why that is vital, though). */ | |
c5aa993b | 320 | bpstat_clear_actions (stop_bpstat); /* Clear queued breakpoint commands */ |
c906108c SS |
321 | |
322 | disable_current_display (); | |
323 | do_cleanups (ALL_CLEANUPS); | |
c4093a6a | 324 | if (event_loop_p && target_can_async_p () && !target_executing) |
43ff13b4 | 325 | do_exec_cleanups (ALL_CLEANUPS); |
6426a772 JM |
326 | if (event_loop_p && sync_execution) |
327 | do_exec_error_cleanups (ALL_CLEANUPS); | |
c906108c SS |
328 | |
329 | if (annotation_level > 1) | |
330 | switch (reason) | |
331 | { | |
332 | case RETURN_QUIT: | |
333 | annotate_quit (); | |
334 | break; | |
335 | case RETURN_ERROR: | |
336 | annotate_error (); | |
337 | break; | |
338 | } | |
339 | ||
99eeeb0f ND |
340 | /* Jump to the containing catch_errors() call, communicating REASON |
341 | to that call via setjmp's return value. Note that REASON can't | |
342 | be zero, by definition in defs.h. */ | |
343 | ||
eb2f494a | 344 | (NORETURN void) SIGLONGJMP (*catch_return, (int) reason); |
c906108c SS |
345 | } |
346 | ||
f9c696d2 AC |
347 | /* Call FUNC() with args FUNC_UIOUT and FUNC_ARGS, catching any |
348 | errors. Set FUNC_CAUGHT to an ``enum return_reason'' if the | |
b5a2688f | 349 | function is aborted (using throw_exception() or zero if the |
f9c696d2 AC |
350 | function returns normally. Set FUNC_VAL to the value returned by |
351 | the function or 0 if the function was aborted. | |
c906108c SS |
352 | |
353 | Must not be called with immediate_quit in effect (bad things might | |
354 | happen, say we got a signal in the middle of a memcpy to quit_return). | |
355 | This is an OK restriction; with very few exceptions immediate_quit can | |
356 | be replaced by judicious use of QUIT. | |
357 | ||
358 | MASK specifies what to catch; it is normally set to | |
359 | RETURN_MASK_ALL, if for no other reason than that the code which | |
360 | calls catch_errors might not be set up to deal with a quit which | |
361 | isn't caught. But if the code can deal with it, it generally | |
362 | should be RETURN_MASK_ERROR, unless for some reason it is more | |
363 | useful to abort only the portion of the operation inside the | |
364 | catch_errors. Note that quit should return to the command line | |
365 | fairly quickly, even if some further processing is being done. */ | |
366 | ||
11cf8741 JM |
367 | /* MAYBE: cagney/1999-11-05: catch_errors() in conjunction with |
368 | error() et.al. could maintain a set of flags that indicate the the | |
369 | current state of each of the longjmp buffers. This would give the | |
370 | longjmp code the chance to detect a longjmp botch (before it gets | |
371 | to longjmperror()). Prior to 1999-11-05 this wasn't possible as | |
372 | code also randomly used a SET_TOP_LEVEL macro that directly | |
373 | initialize the longjmp buffers. */ | |
374 | ||
e26cc349 | 375 | /* MAYBE: cagney/1999-11-05: Should the catch_errors and cleanups code |
11cf8741 JM |
376 | be consolidated into a single file instead of being distributed |
377 | between utils.c and top.c? */ | |
378 | ||
f9c696d2 AC |
379 | static void |
380 | catcher (catch_exceptions_ftype *func, | |
381 | struct ui_out *func_uiout, | |
382 | void *func_args, | |
383 | int *func_val, | |
384 | enum return_reason *func_caught, | |
385 | char *errstring, | |
4fcef00a | 386 | char **gdberrmsg, |
f9c696d2 | 387 | return_mask mask) |
c906108c | 388 | { |
99eeeb0f ND |
389 | SIGJMP_BUF *saved_catch; |
390 | SIGJMP_BUF catch; | |
c906108c SS |
391 | struct cleanup *saved_cleanup_chain; |
392 | char *saved_error_pre_print; | |
393 | char *saved_quit_pre_print; | |
f9c696d2 | 394 | struct ui_out *saved_uiout; |
c906108c | 395 | |
99eeeb0f ND |
396 | /* Return value from SIGSETJMP(): enum return_reason if error or |
397 | quit caught, 0 otherwise. */ | |
398 | int caught; | |
399 | ||
f9c696d2 AC |
400 | /* Return value from FUNC(): Hopefully non-zero. Explicitly set to |
401 | zero if an error quit was caught. */ | |
402 | int val; | |
403 | ||
99eeeb0f ND |
404 | /* Override error/quit messages during FUNC. */ |
405 | ||
c906108c SS |
406 | saved_error_pre_print = error_pre_print; |
407 | saved_quit_pre_print = quit_pre_print; | |
408 | ||
409 | if (mask & RETURN_MASK_ERROR) | |
99eeeb0f | 410 | error_pre_print = errstring; |
c906108c | 411 | if (mask & RETURN_MASK_QUIT) |
99eeeb0f ND |
412 | quit_pre_print = errstring; |
413 | ||
f9c696d2 AC |
414 | /* Override the global ``struct ui_out'' builder. */ |
415 | ||
416 | saved_uiout = uiout; | |
417 | uiout = func_uiout; | |
418 | ||
99eeeb0f ND |
419 | /* Prevent error/quit during FUNC from calling cleanups established |
420 | prior to here. */ | |
421 | ||
422 | saved_cleanup_chain = save_cleanups (); | |
423 | ||
424 | /* Call FUNC, catching error/quit events. */ | |
425 | ||
426 | saved_catch = catch_return; | |
427 | catch_return = &catch; | |
428 | caught = SIGSETJMP (catch); | |
429 | if (!caught) | |
f9c696d2 | 430 | val = (*func) (func_uiout, func_args); |
7f7e9482 | 431 | else |
4fcef00a JJ |
432 | { |
433 | val = 0; | |
434 | /* If caller wants a copy of the low-level error message, make one. | |
435 | This is used in the case of a silent error whereby the caller | |
436 | may optionally want to issue the message. */ | |
437 | if (gdberrmsg) | |
438 | *gdberrmsg = error_last_message (); | |
439 | } | |
99eeeb0f ND |
440 | catch_return = saved_catch; |
441 | ||
e26cc349 | 442 | /* FIXME: cagney/1999-11-05: A correct FUNC implementation will |
99eeeb0f | 443 | clean things up (restoring the cleanup chain) to the state they |
e26cc349 | 444 | were just prior to the call. Unfortunately, many FUNC's are not |
99eeeb0f ND |
445 | that well behaved. This could be fixed by adding either a |
446 | do_cleanups call (to cover the problem) or an assertion check to | |
447 | detect bad FUNCs code. */ | |
448 | ||
f9c696d2 AC |
449 | /* Restore the cleanup chain, the error/quit messages, and the uiout |
450 | builder, to their original states. */ | |
c906108c SS |
451 | |
452 | restore_cleanups (saved_cleanup_chain); | |
453 | ||
f9c696d2 AC |
454 | uiout = saved_uiout; |
455 | ||
c906108c | 456 | if (mask & RETURN_MASK_QUIT) |
99eeeb0f ND |
457 | quit_pre_print = saved_quit_pre_print; |
458 | if (mask & RETURN_MASK_ERROR) | |
459 | error_pre_print = saved_error_pre_print; | |
460 | ||
f9c696d2 AC |
461 | /* Return normally if no error/quit event occurred or this catcher |
462 | can handle this exception. The caller analyses the func return | |
463 | values. */ | |
99eeeb0f | 464 | |
f9c696d2 AC |
465 | if (!caught || (mask & RETURN_MASK (caught))) |
466 | { | |
467 | *func_val = val; | |
468 | *func_caught = caught; | |
469 | return; | |
470 | } | |
99eeeb0f | 471 | |
f9c696d2 | 472 | /* The caller didn't request that the event be caught, relay the |
99eeeb0f ND |
473 | event to the next containing catch_errors(). */ |
474 | ||
b5a2688f | 475 | throw_exception (caught); |
f9c696d2 | 476 | } |
99eeeb0f | 477 | |
f9c696d2 AC |
478 | int |
479 | catch_exceptions (struct ui_out *uiout, | |
480 | catch_exceptions_ftype *func, | |
481 | void *func_args, | |
482 | char *errstring, | |
483 | return_mask mask) | |
484 | { | |
485 | int val; | |
486 | enum return_reason caught; | |
4fcef00a JJ |
487 | catcher (func, uiout, func_args, &val, &caught, errstring, NULL, mask); |
488 | gdb_assert (val >= 0); | |
489 | gdb_assert (caught <= 0); | |
490 | if (caught < 0) | |
491 | return caught; | |
492 | return val; | |
493 | } | |
494 | ||
495 | int | |
496 | catch_exceptions_with_msg (struct ui_out *uiout, | |
497 | catch_exceptions_ftype *func, | |
498 | void *func_args, | |
499 | char *errstring, | |
500 | char **gdberrmsg, | |
501 | return_mask mask) | |
502 | { | |
503 | int val; | |
504 | enum return_reason caught; | |
505 | catcher (func, uiout, func_args, &val, &caught, errstring, gdberrmsg, mask); | |
f9c696d2 AC |
506 | gdb_assert (val >= 0); |
507 | gdb_assert (caught <= 0); | |
508 | if (caught < 0) | |
509 | return caught; | |
510 | return val; | |
511 | } | |
99eeeb0f | 512 | |
f9c696d2 AC |
513 | struct catch_errors_args |
514 | { | |
515 | catch_errors_ftype *func; | |
516 | void *func_args; | |
517 | }; | |
99eeeb0f | 518 | |
b9362cc7 | 519 | static int |
f9c696d2 AC |
520 | do_catch_errors (struct ui_out *uiout, void *data) |
521 | { | |
522 | struct catch_errors_args *args = data; | |
523 | return args->func (args->func_args); | |
524 | } | |
99eeeb0f | 525 | |
f9c696d2 AC |
526 | int |
527 | catch_errors (catch_errors_ftype *func, void *func_args, char *errstring, | |
528 | return_mask mask) | |
529 | { | |
530 | int val; | |
531 | enum return_reason caught; | |
532 | struct catch_errors_args args; | |
533 | args.func = func; | |
534 | args.func_args = func_args; | |
4fcef00a JJ |
535 | catcher (do_catch_errors, uiout, &args, &val, &caught, errstring, |
536 | NULL, mask); | |
f9c696d2 AC |
537 | if (caught != 0) |
538 | return 0; | |
539 | return val; | |
c906108c SS |
540 | } |
541 | ||
11cf8741 JM |
542 | struct captured_command_args |
543 | { | |
544 | catch_command_errors_ftype *command; | |
545 | char *arg; | |
546 | int from_tty; | |
547 | }; | |
548 | ||
549 | static int | |
550 | do_captured_command (void *data) | |
551 | { | |
552 | struct captured_command_args *context = data; | |
553 | context->command (context->arg, context->from_tty); | |
554 | /* FIXME: cagney/1999-11-07: Technically this do_cleanups() call | |
555 | isn't needed. Instead an assertion check could be made that | |
556 | simply confirmed that the called function correctly cleaned up | |
e26cc349 | 557 | after itself. Unfortunately, old code (prior to 1999-11-04) in |
11cf8741 JM |
558 | main.c was calling SET_TOP_LEVEL(), calling the command function, |
559 | and then *always* calling do_cleanups(). For the moment we | |
560 | remain ``bug compatible'' with that old code.. */ | |
561 | do_cleanups (ALL_CLEANUPS); | |
562 | return 1; | |
563 | } | |
564 | ||
565 | int | |
eb2f494a | 566 | catch_command_errors (catch_command_errors_ftype * command, |
11cf8741 JM |
567 | char *arg, int from_tty, return_mask mask) |
568 | { | |
569 | struct captured_command_args args; | |
570 | args.command = command; | |
571 | args.arg = arg; | |
572 | args.from_tty = from_tty; | |
573 | return catch_errors (do_captured_command, &args, "", mask); | |
574 | } | |
575 | ||
576 | ||
c906108c SS |
577 | /* Handler for SIGHUP. */ |
578 | ||
579 | #ifdef SIGHUP | |
c906108c SS |
580 | /* Just a little helper function for disconnect(). */ |
581 | ||
392a587b | 582 | /* NOTE 1999-04-29: This function will be static again, once we modify |
cd0fc7c3 SS |
583 | gdb to use the event loop as the default command loop and we merge |
584 | event-top.c into this file, top.c */ | |
585 | /* static */ int | |
d0c8cdfb | 586 | quit_cover (void *s) |
c906108c | 587 | { |
c5aa993b JM |
588 | caution = 0; /* Throw caution to the wind -- we're exiting. |
589 | This prevents asking the user dumb questions. */ | |
590 | quit_command ((char *) 0, 0); | |
c906108c SS |
591 | return 0; |
592 | } | |
64cdedad EZ |
593 | |
594 | static void | |
595 | disconnect (int signo) | |
596 | { | |
597 | catch_errors (quit_cover, NULL, | |
598 | "Could not kill the program being debugged", RETURN_MASK_ALL); | |
599 | signal (SIGHUP, SIG_DFL); | |
600 | kill (getpid (), SIGHUP); | |
601 | } | |
c906108c SS |
602 | #endif /* defined SIGHUP */ |
603 | \f | |
604 | /* Line number we are currently in in a file which is being sourced. */ | |
392a587b | 605 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
cd0fc7c3 SS |
606 | gdb to use the event loop as the default command loop and we merge |
607 | event-top.c into this file, top.c */ | |
608 | /* static */ int source_line_number; | |
c906108c SS |
609 | |
610 | /* Name of the file we are sourcing. */ | |
392a587b | 611 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
cd0fc7c3 SS |
612 | gdb to use the event loop as the default command loop and we merge |
613 | event-top.c into this file, top.c */ | |
614 | /* static */ char *source_file_name; | |
c906108c SS |
615 | |
616 | /* Buffer containing the error_pre_print used by the source stuff. | |
617 | Malloc'd. */ | |
392a587b | 618 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
cd0fc7c3 SS |
619 | gdb to use the event loop as the default command loop and we merge |
620 | event-top.c into this file, top.c */ | |
621 | /* static */ char *source_error; | |
c906108c SS |
622 | static int source_error_allocated; |
623 | ||
624 | /* Something to glom on to the start of error_pre_print if source_file_name | |
625 | is set. */ | |
392a587b | 626 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
cd0fc7c3 SS |
627 | gdb to use the event loop as the default command loop and we merge |
628 | event-top.c into this file, top.c */ | |
629 | /* static */ char *source_pre_error; | |
c906108c SS |
630 | |
631 | /* Clean up on error during a "source" command (or execution of a | |
632 | user-defined command). */ | |
633 | ||
d318976c | 634 | void |
e41a3b1a | 635 | do_restore_instream_cleanup (void *stream) |
c906108c SS |
636 | { |
637 | /* Restore the previous input stream. */ | |
638 | instream = stream; | |
639 | } | |
640 | ||
641 | /* Read commands from STREAM. */ | |
642 | void | |
fba45db2 | 643 | read_command_file (FILE *stream) |
c906108c SS |
644 | { |
645 | struct cleanup *cleanups; | |
646 | ||
e41a3b1a | 647 | cleanups = make_cleanup (do_restore_instream_cleanup, instream); |
c906108c | 648 | instream = stream; |
c5aa993b | 649 | command_loop (); |
c906108c SS |
650 | do_cleanups (cleanups); |
651 | } | |
652 | \f | |
507f3c78 | 653 | void (*pre_init_ui_hook) (void); |
c906108c | 654 | |
e41a3b1a AC |
655 | #ifdef __MSDOS__ |
656 | void | |
657 | do_chdir_cleanup (void *old_dir) | |
658 | { | |
659 | chdir (old_dir); | |
b8c9b27d | 660 | xfree (old_dir); |
e41a3b1a AC |
661 | } |
662 | #endif | |
663 | ||
d318976c FN |
664 | /* Execute the line P as a command. |
665 | Pass FROM_TTY as second argument to the defining function. */ | |
c906108c | 666 | |
d318976c FN |
667 | void |
668 | execute_command (char *p, int from_tty) | |
c906108c | 669 | { |
52f0bd74 AC |
670 | struct cmd_list_element *c; |
671 | enum language flang; | |
d318976c FN |
672 | static int warned = 0; |
673 | char *line; | |
67e1e03a | 674 | |
d318976c | 675 | free_all_values (); |
c906108c | 676 | |
d318976c FN |
677 | /* Force cleanup of any alloca areas if using C alloca instead of |
678 | a builtin alloca. */ | |
679 | alloca (0); | |
c906108c | 680 | |
d318976c FN |
681 | /* This can happen when command_line_input hits end of file. */ |
682 | if (p == NULL) | |
683 | return; | |
c906108c | 684 | |
d318976c | 685 | serial_log_command (p); |
8b93c638 | 686 | |
d318976c FN |
687 | while (*p == ' ' || *p == '\t') |
688 | p++; | |
689 | if (*p) | |
8b93c638 | 690 | { |
d318976c FN |
691 | char *arg; |
692 | line = p; | |
8b93c638 | 693 | |
d318976c | 694 | c = lookup_cmd (&p, cmdlist, "", 0, 1); |
8b93c638 | 695 | |
d318976c FN |
696 | /* If the target is running, we allow only a limited set of |
697 | commands. */ | |
698 | if (event_loop_p && target_can_async_p () && target_executing) | |
d8fe84e3 EZ |
699 | if (strcmp (c->name, "help") != 0 |
700 | && strcmp (c->name, "pwd") != 0 | |
701 | && strcmp (c->name, "show") != 0 | |
702 | && strcmp (c->name, "stop") != 0) | |
d318976c | 703 | error ("Cannot execute this command while the target is running."); |
8b93c638 | 704 | |
d318976c FN |
705 | /* Pass null arg rather than an empty one. */ |
706 | arg = *p ? p : 0; | |
8b93c638 | 707 | |
9f60d481 AC |
708 | /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy |
709 | while the is_complete_command(cfunc) test is just plain | |
710 | bogus. They should both be replaced by a test of the form | |
711 | c->strip_trailing_white_space_p. */ | |
712 | /* NOTE: cagney/2002-02-02: The function.cfunc in the below | |
713 | can't be replaced with func. This is because it is the | |
714 | cfunc, and not the func, that has the value that the | |
715 | is_complete_command hack is testing for. */ | |
716 | /* Clear off trailing whitespace, except for set and complete | |
717 | command. */ | |
d318976c FN |
718 | if (arg |
719 | && c->type != set_cmd | |
bbaca940 | 720 | && !is_complete_command (c)) |
8b93c638 | 721 | { |
d318976c FN |
722 | p = arg + strlen (arg) - 1; |
723 | while (p >= arg && (*p == ' ' || *p == '\t')) | |
724 | p--; | |
725 | *(p + 1) = '\0'; | |
8b93c638 JM |
726 | } |
727 | ||
d318976c | 728 | /* If this command has been pre-hooked, run the hook first. */ |
5913bcb0 | 729 | execute_cmd_pre_hook (c); |
c906108c | 730 | |
d318976c FN |
731 | if (c->flags & DEPRECATED_WARN_USER) |
732 | deprecated_cmd_warning (&line); | |
c906108c | 733 | |
d318976c FN |
734 | if (c->class == class_user) |
735 | execute_user_command (c, arg); | |
736 | else if (c->type == set_cmd || c->type == show_cmd) | |
737 | do_setshow_command (arg, from_tty & caution, c); | |
f436dd25 | 738 | else if (!cmd_func_p (c)) |
d318976c FN |
739 | error ("That is not a command, just a help topic."); |
740 | else if (call_command_hook) | |
741 | call_command_hook (c, arg, from_tty & caution); | |
742 | else | |
f436dd25 | 743 | cmd_func (c, arg, from_tty & caution); |
d318976c FN |
744 | |
745 | /* If this command has been post-hooked, run the hook last. */ | |
5913bcb0 | 746 | execute_cmd_post_hook (c); |
c906108c | 747 | |
c906108c SS |
748 | } |
749 | ||
d318976c FN |
750 | /* Tell the user if the language has changed (except first time). */ |
751 | if (current_language != expected_language) | |
c906108c | 752 | { |
d318976c | 753 | if (language_mode == language_mode_auto) |
c906108c | 754 | { |
d318976c | 755 | language_info (1); /* Print what changed. */ |
c906108c | 756 | } |
d318976c | 757 | warned = 0; |
c906108c SS |
758 | } |
759 | ||
d318976c FN |
760 | /* Warn the user if the working language does not match the |
761 | language of the current frame. Only warn the user if we are | |
762 | actually running the program, i.e. there is a stack. */ | |
763 | /* FIXME: This should be cacheing the frame and only running when | |
764 | the frame changes. */ | |
765 | ||
766 | if (target_has_stack) | |
c906108c | 767 | { |
d318976c FN |
768 | flang = get_frame_language (); |
769 | if (!warned | |
770 | && flang != language_unknown | |
771 | && flang != current_language->la_language) | |
c906108c | 772 | { |
d318976c FN |
773 | printf_filtered ("%s\n", lang_frame_mismatch_warn); |
774 | warned = 1; | |
c906108c | 775 | } |
c906108c SS |
776 | } |
777 | } | |
778 | ||
d318976c FN |
779 | /* Read commands from `instream' and execute them |
780 | until end of file or error reading instream. */ | |
c906108c | 781 | |
d318976c FN |
782 | void |
783 | command_loop (void) | |
c906108c | 784 | { |
d318976c FN |
785 | struct cleanup *old_chain; |
786 | char *command; | |
787 | int stdin_is_tty = ISATTY (stdin); | |
788 | long time_at_cmd_start; | |
789 | #ifdef HAVE_SBRK | |
790 | long space_at_cmd_start = 0; | |
791 | #endif | |
792 | extern int display_time; | |
793 | extern int display_space; | |
c5aa993b | 794 | |
d318976c FN |
795 | while (instream && !feof (instream)) |
796 | { | |
d318976c FN |
797 | if (window_hook && instream == stdin) |
798 | (*window_hook) (instream, get_prompt ()); | |
c906108c | 799 | |
d318976c FN |
800 | quit_flag = 0; |
801 | if (instream == stdin && stdin_is_tty) | |
802 | reinitialize_more_filter (); | |
803 | old_chain = make_cleanup (null_cleanup, 0); | |
c906108c | 804 | |
d318976c FN |
805 | /* Get a command-line. This calls the readline package. */ |
806 | command = command_line_input (instream == stdin ? | |
807 | get_prompt () : (char *) NULL, | |
808 | instream == stdin, "prompt"); | |
d318976c FN |
809 | if (command == 0) |
810 | return; | |
c906108c | 811 | |
d318976c | 812 | time_at_cmd_start = get_run_time (); |
c906108c | 813 | |
d318976c | 814 | if (display_space) |
9e0b60a8 | 815 | { |
d318976c | 816 | #ifdef HAVE_SBRK |
d318976c | 817 | char *lim = (char *) sbrk (0); |
6dd77b81 | 818 | space_at_cmd_start = lim - lim_at_start; |
9e0b60a8 | 819 | #endif |
d318976c | 820 | } |
9e0b60a8 | 821 | |
d318976c FN |
822 | execute_command (command, instream == stdin); |
823 | /* Do any commands attached to breakpoint we stopped at. */ | |
824 | bpstat_do_actions (&stop_bpstat); | |
825 | do_cleanups (old_chain); | |
9e0b60a8 | 826 | |
d318976c | 827 | if (display_time) |
9e0b60a8 | 828 | { |
d318976c | 829 | long cmd_time = get_run_time () - time_at_cmd_start; |
9e0b60a8 | 830 | |
d318976c FN |
831 | printf_unfiltered ("Command execution time: %ld.%06ld\n", |
832 | cmd_time / 1000000, cmd_time % 1000000); | |
9e0b60a8 | 833 | } |
9e0b60a8 | 834 | |
d318976c | 835 | if (display_space) |
9e0b60a8 | 836 | { |
d318976c | 837 | #ifdef HAVE_SBRK |
d318976c | 838 | char *lim = (char *) sbrk (0); |
6dd77b81 | 839 | long space_now = lim - lim_at_start; |
d318976c FN |
840 | long space_diff = space_now - space_at_cmd_start; |
841 | ||
842 | printf_unfiltered ("Space used: %ld (%c%ld for this command)\n", | |
843 | space_now, | |
844 | (space_diff >= 0 ? '+' : '-'), | |
845 | space_diff); | |
846 | #endif | |
9e0b60a8 | 847 | } |
9e0b60a8 | 848 | } |
9e0b60a8 | 849 | } |
9e0b60a8 | 850 | |
d318976c FN |
851 | /* Read commands from `instream' and execute them until end of file or |
852 | error reading instream. This command loop doesnt care about any | |
853 | such things as displaying time and space usage. If the user asks | |
854 | for those, they won't work. */ | |
855 | void | |
856 | simplified_command_loop (char *(*read_input_func) (char *), | |
857 | void (*execute_command_func) (char *, int)) | |
9e0b60a8 | 858 | { |
d318976c FN |
859 | struct cleanup *old_chain; |
860 | char *command; | |
861 | int stdin_is_tty = ISATTY (stdin); | |
9e0b60a8 | 862 | |
d318976c | 863 | while (instream && !feof (instream)) |
9e0b60a8 | 864 | { |
d318976c FN |
865 | quit_flag = 0; |
866 | if (instream == stdin && stdin_is_tty) | |
867 | reinitialize_more_filter (); | |
868 | old_chain = make_cleanup (null_cleanup, 0); | |
869 | ||
870 | /* Get a command-line. */ | |
871 | command = (*read_input_func) (instream == stdin ? | |
872 | get_prompt () : (char *) NULL); | |
9e0b60a8 | 873 | |
d318976c FN |
874 | if (command == 0) |
875 | return; | |
9e0b60a8 | 876 | |
d318976c | 877 | (*execute_command_func) (command, instream == stdin); |
9e0b60a8 | 878 | |
d318976c FN |
879 | /* Do any commands attached to breakpoint we stopped at. */ |
880 | bpstat_do_actions (&stop_bpstat); | |
9e0b60a8 | 881 | |
d318976c | 882 | do_cleanups (old_chain); |
c5aa993b | 883 | } |
9e0b60a8 | 884 | } |
d318976c FN |
885 | \f |
886 | /* Commands call this if they do not want to be repeated by null lines. */ | |
9e0b60a8 | 887 | |
d318976c FN |
888 | void |
889 | dont_repeat (void) | |
9e0b60a8 | 890 | { |
d318976c FN |
891 | if (server_command) |
892 | return; | |
9e0b60a8 | 893 | |
d318976c FN |
894 | /* If we aren't reading from standard input, we are saving the last |
895 | thing read from stdin in line and don't want to delete it. Null lines | |
896 | won't repeat here in any case. */ | |
897 | if (instream == stdin) | |
898 | *line = 0; | |
9e0b60a8 | 899 | } |
d318976c FN |
900 | \f |
901 | /* Read a line from the stream "instream" without command line editing. | |
9e0b60a8 | 902 | |
d318976c FN |
903 | It prints PROMPT_ARG once at the start. |
904 | Action is compatible with "readline", e.g. space for the result is | |
905 | malloc'd and should be freed by the caller. | |
9e0b60a8 | 906 | |
d318976c FN |
907 | A NULL return means end of file. */ |
908 | char * | |
909 | gdb_readline (char *prompt_arg) | |
9e0b60a8 | 910 | { |
d318976c FN |
911 | int c; |
912 | char *result; | |
913 | int input_index = 0; | |
914 | int result_size = 80; | |
9e0b60a8 | 915 | |
d318976c | 916 | if (prompt_arg) |
9e0b60a8 | 917 | { |
d318976c FN |
918 | /* Don't use a _filtered function here. It causes the assumed |
919 | character position to be off, since the newline we read from | |
920 | the user is not accounted for. */ | |
921 | fputs_unfiltered (prompt_arg, gdb_stdout); | |
9e0b60a8 JM |
922 | gdb_flush (gdb_stdout); |
923 | } | |
924 | ||
d318976c | 925 | result = (char *) xmalloc (result_size); |
9e0b60a8 JM |
926 | |
927 | while (1) | |
928 | { | |
d318976c FN |
929 | /* Read from stdin if we are executing a user defined command. |
930 | This is the right thing for prompt_for_continue, at least. */ | |
931 | c = fgetc (instream ? instream : stdin); | |
9e0b60a8 | 932 | |
d318976c | 933 | if (c == EOF) |
9e0b60a8 | 934 | { |
d318976c FN |
935 | if (input_index > 0) |
936 | /* The last line does not end with a newline. Return it, and | |
937 | if we are called again fgetc will still return EOF and | |
938 | we'll return NULL then. */ | |
9e0b60a8 | 939 | break; |
b8c9b27d | 940 | xfree (result); |
d318976c | 941 | return NULL; |
9e0b60a8 | 942 | } |
c5aa993b | 943 | |
d318976c FN |
944 | if (c == '\n') |
945 | #ifndef CRLF_SOURCE_FILES | |
946 | break; | |
947 | #else | |
9e0b60a8 | 948 | { |
d318976c FN |
949 | if (input_index > 0 && result[input_index - 1] == '\r') |
950 | input_index--; | |
951 | break; | |
9e0b60a8 | 952 | } |
d318976c | 953 | #endif |
9e0b60a8 | 954 | |
d318976c FN |
955 | result[input_index++] = c; |
956 | while (input_index >= result_size) | |
9e0b60a8 | 957 | { |
d318976c FN |
958 | result_size *= 2; |
959 | result = (char *) xrealloc (result, result_size); | |
9e0b60a8 | 960 | } |
9e0b60a8 JM |
961 | } |
962 | ||
d318976c FN |
963 | result[input_index++] = '\0'; |
964 | return result; | |
9e0b60a8 JM |
965 | } |
966 | ||
d318976c FN |
967 | /* Variables which control command line editing and history |
968 | substitution. These variables are given default values at the end | |
969 | of this file. */ | |
970 | static int command_editing_p; | |
971 | /* NOTE 1999-04-29: This variable will be static again, once we modify | |
972 | gdb to use the event loop as the default command loop and we merge | |
973 | event-top.c into this file, top.c */ | |
974 | /* static */ int history_expansion_p; | |
975 | static int write_history_p; | |
976 | static int history_size; | |
977 | static char *history_filename; | |
9e0b60a8 | 978 | |
b4f5539f TT |
979 | /* This is like readline(), but it has some gdb-specific behavior. |
980 | gdb can use readline in both the synchronous and async modes during | |
981 | a single gdb invocation. At the ordinary top-level prompt we might | |
982 | be using the async readline. That means we can't use | |
983 | rl_pre_input_hook, since it doesn't work properly in async mode. | |
984 | However, for a secondary prompt (" >", such as occurs during a | |
985 | `define'), gdb just calls readline() directly, running it in | |
986 | synchronous mode. So for operate-and-get-next to work in this | |
987 | situation, we have to switch the hooks around. That is what | |
988 | gdb_readline_wrapper is for. */ | |
989 | char * | |
990 | gdb_readline_wrapper (char *prompt) | |
991 | { | |
992 | /* Set the hook that works in this case. */ | |
993 | if (event_loop_p && after_char_processing_hook) | |
994 | { | |
995 | rl_pre_input_hook = (Function *) after_char_processing_hook; | |
996 | after_char_processing_hook = NULL; | |
997 | } | |
998 | ||
999 | return readline (prompt); | |
1000 | } | |
1001 | ||
9e0b60a8 | 1002 | \f |
d318976c FN |
1003 | #ifdef STOP_SIGNAL |
1004 | static void | |
1005 | stop_sig (int signo) | |
9e0b60a8 | 1006 | { |
d318976c FN |
1007 | #if STOP_SIGNAL == SIGTSTP |
1008 | signal (SIGTSTP, SIG_DFL); | |
46711df8 MK |
1009 | #if HAVE_SIGPROCMASK |
1010 | { | |
1011 | sigset_t zero; | |
1012 | ||
1013 | sigemptyset (&zero); | |
1014 | sigprocmask (SIG_SETMASK, &zero, 0); | |
1015 | } | |
1016 | #elif HAVE_SIGSETMASK | |
d318976c | 1017 | sigsetmask (0); |
46711df8 | 1018 | #endif |
d318976c FN |
1019 | kill (getpid (), SIGTSTP); |
1020 | signal (SIGTSTP, stop_sig); | |
1021 | #else | |
1022 | signal (STOP_SIGNAL, stop_sig); | |
1023 | #endif | |
1024 | printf_unfiltered ("%s", get_prompt ()); | |
1025 | gdb_flush (gdb_stdout); | |
9e0b60a8 | 1026 | |
d318976c FN |
1027 | /* Forget about any previous command -- null line now will do nothing. */ |
1028 | dont_repeat (); | |
9e0b60a8 | 1029 | } |
d318976c | 1030 | #endif /* STOP_SIGNAL */ |
9e0b60a8 | 1031 | |
d318976c | 1032 | /* Initialize signal handlers. */ |
64cdedad EZ |
1033 | static void |
1034 | float_handler (int signo) | |
1035 | { | |
1036 | /* This message is based on ANSI C, section 4.7. Note that integer | |
1037 | divide by zero causes this, so "float" is a misnomer. */ | |
1038 | signal (SIGFPE, float_handler); | |
1039 | error ("Erroneous arithmetic operation."); | |
1040 | } | |
1041 | ||
9e0b60a8 | 1042 | static void |
d318976c | 1043 | do_nothing (int signo) |
9e0b60a8 | 1044 | { |
d318976c FN |
1045 | /* Under System V the default disposition of a signal is reinstated after |
1046 | the signal is caught and delivered to an application process. On such | |
1047 | systems one must restore the replacement signal handler if one wishes | |
1048 | to continue handling the signal in one's program. On BSD systems this | |
1049 | is not needed but it is harmless, and it simplifies the code to just do | |
1050 | it unconditionally. */ | |
1051 | signal (signo, do_nothing); | |
9e0b60a8 JM |
1052 | } |
1053 | ||
9e0b60a8 | 1054 | static void |
d318976c | 1055 | init_signals (void) |
9e0b60a8 | 1056 | { |
d318976c | 1057 | signal (SIGINT, request_quit); |
9e0b60a8 | 1058 | |
d318976c FN |
1059 | /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed |
1060 | to the inferior and breakpoints will be ignored. */ | |
1061 | #ifdef SIGTRAP | |
1062 | signal (SIGTRAP, SIG_DFL); | |
1063 | #endif | |
9e0b60a8 | 1064 | |
d318976c FN |
1065 | /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get |
1066 | passed to the inferior, which we don't want. It would be | |
1067 | possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but | |
1068 | on BSD4.3 systems using vfork, that can affect the | |
1069 | GDB process as well as the inferior (the signal handling tables | |
1070 | might be in memory, shared between the two). Since we establish | |
1071 | a handler for SIGQUIT, when we call exec it will set the signal | |
1072 | to SIG_DFL for us. */ | |
1073 | signal (SIGQUIT, do_nothing); | |
1074 | #ifdef SIGHUP | |
1075 | if (signal (SIGHUP, do_nothing) != SIG_IGN) | |
1076 | signal (SIGHUP, disconnect); | |
1077 | #endif | |
1078 | signal (SIGFPE, float_handler); | |
9e0b60a8 | 1079 | |
d318976c FN |
1080 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
1081 | signal (SIGWINCH, SIGWINCH_HANDLER); | |
1082 | #endif | |
9e0b60a8 JM |
1083 | } |
1084 | \f | |
467d8519 TT |
1085 | /* The current saved history number from operate-and-get-next. |
1086 | This is -1 if not valid. */ | |
1087 | static int operate_saved_history = -1; | |
1088 | ||
1089 | /* This is put on the appropriate hook and helps operate-and-get-next | |
1090 | do its work. */ | |
b9362cc7 | 1091 | static void |
5ae5f592 | 1092 | gdb_rl_operate_and_get_next_completion (void) |
467d8519 TT |
1093 | { |
1094 | int delta = where_history () - operate_saved_history; | |
1095 | /* The `key' argument to rl_get_previous_history is ignored. */ | |
1096 | rl_get_previous_history (delta, 0); | |
1097 | operate_saved_history = -1; | |
1098 | ||
1099 | /* readline doesn't automatically update the display for us. */ | |
1100 | rl_redisplay (); | |
1101 | ||
1102 | after_char_processing_hook = NULL; | |
1103 | rl_pre_input_hook = NULL; | |
1104 | } | |
1105 | ||
1106 | /* This is a gdb-local readline command handler. It accepts the | |
1107 | current command line (like RET does) and, if this command was taken | |
1108 | from the history, arranges for the next command in the history to | |
1109 | appear on the command line when the prompt returns. | |
1110 | We ignore the arguments. */ | |
1111 | static int | |
1112 | gdb_rl_operate_and_get_next (int count, int key) | |
1113 | { | |
b5686e99 MK |
1114 | int where; |
1115 | ||
467d8519 TT |
1116 | if (event_loop_p) |
1117 | { | |
1118 | /* Use the async hook. */ | |
1119 | after_char_processing_hook = gdb_rl_operate_and_get_next_completion; | |
1120 | } | |
1121 | else | |
1122 | { | |
1123 | /* This hook only works correctly when we are using the | |
1124 | synchronous readline. */ | |
1125 | rl_pre_input_hook = (Function *) gdb_rl_operate_and_get_next_completion; | |
1126 | } | |
1127 | ||
b5686e99 MK |
1128 | /* Find the current line, and find the next line to use. */ |
1129 | where = where_history(); | |
1130 | ||
1131 | /* FIXME: kettenis/20020817: max_input_history is renamed into | |
1132 | history_max_entries in readline-4.2. When we do a new readline | |
1133 | import, we should probably change it here too, even though | |
1134 | readline maintains backwards compatibility for now by still | |
1135 | defining max_input_history. */ | |
1136 | if ((history_is_stifled () && (history_length >= max_input_history)) || | |
1137 | (where >= history_length - 1)) | |
1138 | operate_saved_history = where; | |
1139 | else | |
1140 | operate_saved_history = where + 1; | |
1141 | ||
467d8519 TT |
1142 | return rl_newline (1, key); |
1143 | } | |
1144 | \f | |
d318976c FN |
1145 | /* Read one line from the command input stream `instream' |
1146 | into the local static buffer `linebuffer' (whose current length | |
1147 | is `linelength'). | |
1148 | The buffer is made bigger as necessary. | |
1149 | Returns the address of the start of the line. | |
9e0b60a8 | 1150 | |
d318976c | 1151 | NULL is returned for end of file. |
9e0b60a8 | 1152 | |
d318976c FN |
1153 | *If* the instream == stdin & stdin is a terminal, the line read |
1154 | is copied into the file line saver (global var char *line, | |
1155 | length linesize) so that it can be duplicated. | |
9e0b60a8 | 1156 | |
d318976c FN |
1157 | This routine either uses fancy command line editing or |
1158 | simple input as the user has requested. */ | |
10689f25 | 1159 | |
d318976c FN |
1160 | char * |
1161 | command_line_input (char *prompt_arg, int repeat, char *annotation_suffix) | |
9e0b60a8 | 1162 | { |
d318976c FN |
1163 | static char *linebuffer = 0; |
1164 | static unsigned linelength = 0; | |
52f0bd74 | 1165 | char *p; |
d318976c FN |
1166 | char *p1; |
1167 | char *rl; | |
1168 | char *local_prompt = prompt_arg; | |
1169 | char *nline; | |
1170 | char got_eof = 0; | |
1171 | ||
1172 | /* The annotation suffix must be non-NULL. */ | |
1173 | if (annotation_suffix == NULL) | |
1174 | annotation_suffix = ""; | |
9e0b60a8 | 1175 | |
d318976c FN |
1176 | if (annotation_level > 1 && instream == stdin) |
1177 | { | |
1178 | local_prompt = alloca ((prompt_arg == NULL ? 0 : strlen (prompt_arg)) | |
1179 | + strlen (annotation_suffix) + 40); | |
1180 | if (prompt_arg == NULL) | |
1181 | local_prompt[0] = '\0'; | |
1182 | else | |
1183 | strcpy (local_prompt, prompt_arg); | |
1184 | strcat (local_prompt, "\n\032\032"); | |
1185 | strcat (local_prompt, annotation_suffix); | |
1186 | strcat (local_prompt, "\n"); | |
1187 | } | |
9e0b60a8 | 1188 | |
d318976c | 1189 | if (linebuffer == 0) |
9e0b60a8 | 1190 | { |
d318976c FN |
1191 | linelength = 80; |
1192 | linebuffer = (char *) xmalloc (linelength); | |
9e0b60a8 | 1193 | } |
9e0b60a8 | 1194 | |
d318976c | 1195 | p = linebuffer; |
9e0b60a8 | 1196 | |
d318976c FN |
1197 | /* Control-C quits instantly if typed while in this loop |
1198 | since it should not wait until the user types a newline. */ | |
1199 | immediate_quit++; | |
1200 | #ifdef STOP_SIGNAL | |
1201 | if (job_control) | |
73bc900d | 1202 | { |
d318976c FN |
1203 | if (event_loop_p) |
1204 | signal (STOP_SIGNAL, handle_stop_sig); | |
1205 | else | |
1206 | signal (STOP_SIGNAL, stop_sig); | |
1207 | } | |
1208 | #endif | |
1209 | ||
1210 | while (1) | |
9e0b60a8 | 1211 | { |
d318976c FN |
1212 | /* Make sure that all output has been output. Some machines may let |
1213 | you get away with leaving out some of the gdb_flush, but not all. */ | |
1214 | wrap_here (""); | |
1215 | gdb_flush (gdb_stdout); | |
1216 | gdb_flush (gdb_stderr); | |
1217 | ||
1218 | if (source_file_name != NULL) | |
1219 | { | |
1220 | ++source_line_number; | |
1221 | sprintf (source_error, | |
1222 | "%s%s:%d: Error in sourced command file:\n", | |
1223 | source_pre_error, | |
1224 | source_file_name, | |
1225 | source_line_number); | |
1226 | error_pre_print = source_error; | |
1227 | } | |
1228 | ||
1229 | if (annotation_level > 1 && instream == stdin) | |
1230 | { | |
306d9ac5 DC |
1231 | puts_unfiltered ("\n\032\032pre-"); |
1232 | puts_unfiltered (annotation_suffix); | |
1233 | puts_unfiltered ("\n"); | |
d318976c FN |
1234 | } |
1235 | ||
1236 | /* Don't use fancy stuff if not talking to stdin. */ | |
1237 | if (readline_hook && instream == NULL) | |
1238 | { | |
1239 | rl = (*readline_hook) (local_prompt); | |
1240 | } | |
1241 | else if (command_editing_p && instream == stdin && ISATTY (instream)) | |
1242 | { | |
b4f5539f | 1243 | rl = gdb_readline_wrapper (local_prompt); |
d318976c | 1244 | } |
9e0b60a8 | 1245 | else |
d318976c FN |
1246 | { |
1247 | rl = gdb_readline (local_prompt); | |
1248 | } | |
9e0b60a8 | 1249 | |
d318976c FN |
1250 | if (annotation_level > 1 && instream == stdin) |
1251 | { | |
306d9ac5 DC |
1252 | puts_unfiltered ("\n\032\032post-"); |
1253 | puts_unfiltered (annotation_suffix); | |
1254 | puts_unfiltered ("\n"); | |
d318976c | 1255 | } |
9e0b60a8 | 1256 | |
d318976c | 1257 | if (!rl || rl == (char *) EOF) |
9e0b60a8 | 1258 | { |
d318976c FN |
1259 | got_eof = 1; |
1260 | break; | |
9e0b60a8 | 1261 | } |
d318976c FN |
1262 | if (strlen (rl) + 1 + (p - linebuffer) > linelength) |
1263 | { | |
1264 | linelength = strlen (rl) + 1 + (p - linebuffer); | |
1265 | nline = (char *) xrealloc (linebuffer, linelength); | |
1266 | p += nline - linebuffer; | |
1267 | linebuffer = nline; | |
1268 | } | |
1269 | p1 = rl; | |
1270 | /* Copy line. Don't copy null at end. (Leaves line alone | |
1271 | if this was just a newline) */ | |
1272 | while (*p1) | |
1273 | *p++ = *p1++; | |
9e0b60a8 | 1274 | |
b8c9b27d | 1275 | xfree (rl); /* Allocated in readline. */ |
9e0b60a8 | 1276 | |
d318976c FN |
1277 | if (p == linebuffer || *(p - 1) != '\\') |
1278 | break; | |
9e0b60a8 | 1279 | |
d318976c FN |
1280 | p--; /* Put on top of '\'. */ |
1281 | local_prompt = (char *) 0; | |
1282 | } | |
9e0b60a8 | 1283 | |
d318976c FN |
1284 | #ifdef STOP_SIGNAL |
1285 | if (job_control) | |
1286 | signal (STOP_SIGNAL, SIG_DFL); | |
1287 | #endif | |
1288 | immediate_quit--; | |
9e0b60a8 | 1289 | |
d318976c FN |
1290 | if (got_eof) |
1291 | return NULL; | |
9e0b60a8 | 1292 | |
d318976c FN |
1293 | #define SERVER_COMMAND_LENGTH 7 |
1294 | server_command = | |
1295 | (p - linebuffer > SERVER_COMMAND_LENGTH) | |
bf896cb0 | 1296 | && strncmp (linebuffer, "server ", SERVER_COMMAND_LENGTH) == 0; |
d318976c | 1297 | if (server_command) |
9e0b60a8 | 1298 | { |
d318976c FN |
1299 | /* Note that we don't set `line'. Between this and the check in |
1300 | dont_repeat, this insures that repeating will still do the | |
1301 | right thing. */ | |
1302 | *p = '\0'; | |
1303 | return linebuffer + SERVER_COMMAND_LENGTH; | |
9e0b60a8 | 1304 | } |
9e0b60a8 | 1305 | |
d318976c FN |
1306 | /* Do history expansion if that is wished. */ |
1307 | if (history_expansion_p && instream == stdin | |
1308 | && ISATTY (instream)) | |
1309 | { | |
1310 | char *history_value; | |
1311 | int expanded; | |
9e0b60a8 | 1312 | |
d318976c FN |
1313 | *p = '\0'; /* Insert null now. */ |
1314 | expanded = history_expand (linebuffer, &history_value); | |
1315 | if (expanded) | |
1316 | { | |
1317 | /* Print the changes. */ | |
1318 | printf_unfiltered ("%s\n", history_value); | |
9e0b60a8 | 1319 | |
d318976c FN |
1320 | /* If there was an error, call this function again. */ |
1321 | if (expanded < 0) | |
1322 | { | |
b8c9b27d | 1323 | xfree (history_value); |
d318976c FN |
1324 | return command_line_input (prompt_arg, repeat, annotation_suffix); |
1325 | } | |
1326 | if (strlen (history_value) > linelength) | |
1327 | { | |
1328 | linelength = strlen (history_value) + 1; | |
1329 | linebuffer = (char *) xrealloc (linebuffer, linelength); | |
1330 | } | |
1331 | strcpy (linebuffer, history_value); | |
1332 | p = linebuffer + strlen (linebuffer); | |
b8c9b27d | 1333 | xfree (history_value); |
d318976c FN |
1334 | } |
1335 | } | |
9e0b60a8 | 1336 | |
d318976c FN |
1337 | /* If we just got an empty line, and that is supposed |
1338 | to repeat the previous command, return the value in the | |
1339 | global buffer. */ | |
1340 | if (repeat && p == linebuffer) | |
1341 | return line; | |
1342 | for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++); | |
1343 | if (repeat && !*p1) | |
1344 | return line; | |
9e0b60a8 | 1345 | |
d318976c | 1346 | *p = 0; |
9e0b60a8 | 1347 | |
d318976c FN |
1348 | /* Add line to history if appropriate. */ |
1349 | if (instream == stdin | |
1350 | && ISATTY (stdin) && *linebuffer) | |
1351 | add_history (linebuffer); | |
9e0b60a8 | 1352 | |
d318976c FN |
1353 | /* Note: lines consisting solely of comments are added to the command |
1354 | history. This is useful when you type a command, and then | |
1355 | realize you don't want to execute it quite yet. You can comment | |
1356 | out the command and then later fetch it from the value history | |
1357 | and remove the '#'. The kill ring is probably better, but some | |
1358 | people are in the habit of commenting things out. */ | |
1359 | if (*p1 == '#') | |
1360 | *p1 = '\0'; /* Found a comment. */ | |
9e0b60a8 | 1361 | |
d318976c FN |
1362 | /* Save into global buffer if appropriate. */ |
1363 | if (repeat) | |
1364 | { | |
1365 | if (linelength > linesize) | |
1366 | { | |
1367 | line = xrealloc (line, linelength); | |
1368 | linesize = linelength; | |
1369 | } | |
1370 | strcpy (line, linebuffer); | |
1371 | return line; | |
1372 | } | |
9e0b60a8 | 1373 | |
d318976c | 1374 | return linebuffer; |
9e0b60a8 JM |
1375 | } |
1376 | \f | |
1377 | /* Print the GDB banner. */ | |
1378 | void | |
fba45db2 | 1379 | print_gdb_version (struct ui_file *stream) |
9e0b60a8 JM |
1380 | { |
1381 | /* From GNU coding standards, first line is meant to be easy for a | |
1382 | program to parse, and is just canonical program name and version | |
1383 | number, which starts after last space. */ | |
1384 | ||
1385 | fprintf_filtered (stream, "GNU gdb %s\n", version); | |
1386 | ||
1387 | /* Second line is a copyright notice. */ | |
1388 | ||
0bc2134e | 1389 | fprintf_filtered (stream, "Copyright 2004 Free Software Foundation, Inc.\n"); |
9e0b60a8 JM |
1390 | |
1391 | /* Following the copyright is a brief statement that the program is | |
1392 | free software, that users are free to copy and change it on | |
1393 | certain conditions, that it is covered by the GNU GPL, and that | |
1394 | there is no warranty. */ | |
1395 | ||
1396 | fprintf_filtered (stream, "\ | |
1397 | GDB is free software, covered by the GNU General Public License, and you are\n\ | |
1398 | welcome to change it and/or distribute copies of it under certain conditions.\n\ | |
1399 | Type \"show copying\" to see the conditions.\n\ | |
1400 | There is absolutely no warranty for GDB. Type \"show warranty\" for details.\n"); | |
1401 | ||
1402 | /* After the required info we print the configuration information. */ | |
1403 | ||
1404 | fprintf_filtered (stream, "This GDB was configured as \""); | |
6314a349 | 1405 | if (strcmp (host_name, target_name) != 0) |
9e0b60a8 JM |
1406 | { |
1407 | fprintf_filtered (stream, "--host=%s --target=%s", host_name, target_name); | |
1408 | } | |
1409 | else | |
1410 | { | |
1411 | fprintf_filtered (stream, "%s", host_name); | |
1412 | } | |
1413 | fprintf_filtered (stream, "\"."); | |
1414 | } | |
9e0b60a8 JM |
1415 | \f |
1416 | /* get_prompt: access method for the GDB prompt string. */ | |
1417 | ||
9e0b60a8 | 1418 | char * |
fba45db2 | 1419 | get_prompt (void) |
9e0b60a8 | 1420 | { |
7989c619 AC |
1421 | if (event_loop_p) |
1422 | return PROMPT (0); | |
9e0b60a8 | 1423 | else |
7989c619 | 1424 | return gdb_prompt_string; |
9e0b60a8 JM |
1425 | } |
1426 | ||
1427 | void | |
fba45db2 | 1428 | set_prompt (char *s) |
9e0b60a8 JM |
1429 | { |
1430 | /* ??rehrauer: I don't know why this fails, since it looks as though | |
1431 | assignments to prompt are wrapped in calls to savestring... | |
c5aa993b | 1432 | if (prompt != NULL) |
b8c9b27d | 1433 | xfree (prompt); |
c5aa993b | 1434 | */ |
6426a772 | 1435 | if (event_loop_p) |
9e0b60a8 JM |
1436 | PROMPT (0) = savestring (s, strlen (s)); |
1437 | else | |
1438 | gdb_prompt_string = savestring (s, strlen (s)); | |
1439 | } | |
9e0b60a8 | 1440 | \f |
c5aa993b | 1441 | |
9e0b60a8 JM |
1442 | /* If necessary, make the user confirm that we should quit. Return |
1443 | non-zero if we should quit, zero if we shouldn't. */ | |
1444 | ||
1445 | int | |
fba45db2 | 1446 | quit_confirm (void) |
9e0b60a8 | 1447 | { |
39f77062 | 1448 | if (! ptid_equal (inferior_ptid, null_ptid) && target_has_execution) |
9e0b60a8 JM |
1449 | { |
1450 | char *s; | |
1451 | ||
1452 | /* This is something of a hack. But there's no reliable way to | |
c5aa993b JM |
1453 | see if a GUI is running. The `use_windows' variable doesn't |
1454 | cut it. */ | |
9e0b60a8 JM |
1455 | if (init_ui_hook) |
1456 | s = "A debugging session is active.\nDo you still want to close the debugger?"; | |
1457 | else if (attach_flag) | |
1458 | s = "The program is running. Quit anyway (and detach it)? "; | |
1459 | else | |
1460 | s = "The program is running. Exit anyway? "; | |
1461 | ||
306d9ac5 | 1462 | if (!query ("%s", s)) |
9e0b60a8 JM |
1463 | return 0; |
1464 | } | |
1465 | ||
1466 | return 1; | |
1467 | } | |
1468 | ||
b0abbc58 | 1469 | /* Helper routine for quit_force that requires error handling. */ |
9e0b60a8 | 1470 | |
b0abbc58 | 1471 | struct qt_args |
9e0b60a8 | 1472 | { |
b0abbc58 JJ |
1473 | char *args; |
1474 | int from_tty; | |
1475 | }; | |
9e0b60a8 | 1476 | |
b0abbc58 JJ |
1477 | static int |
1478 | quit_target (void *arg) | |
1479 | { | |
1480 | struct qt_args *qt = (struct qt_args *)arg; | |
9e0b60a8 | 1481 | |
39f77062 | 1482 | if (! ptid_equal (inferior_ptid, null_ptid) && target_has_execution) |
9e0b60a8 JM |
1483 | { |
1484 | if (attach_flag) | |
b0abbc58 | 1485 | target_detach (qt->args, qt->from_tty); |
9e0b60a8 | 1486 | else |
b0abbc58 | 1487 | target_kill (); |
9e0b60a8 JM |
1488 | } |
1489 | ||
1490 | /* UDI wants this, to kill the TIP. */ | |
f1c07ab0 | 1491 | target_close (¤t_target, 1); |
9e0b60a8 JM |
1492 | |
1493 | /* Save the history information if it is appropriate to do so. */ | |
1494 | if (write_history_p && history_filename) | |
1495 | write_history (history_filename); | |
1496 | ||
c5aa993b | 1497 | do_final_cleanups (ALL_CLEANUPS); /* Do any final cleanups before exiting */ |
9e0b60a8 | 1498 | |
b0abbc58 JJ |
1499 | return 0; |
1500 | } | |
1501 | ||
1502 | /* Quit without asking for confirmation. */ | |
1503 | ||
1504 | void | |
1505 | quit_force (char *args, int from_tty) | |
1506 | { | |
1507 | int exit_code = 0; | |
365c70b1 | 1508 | struct qt_args qt; |
b0abbc58 JJ |
1509 | |
1510 | /* An optional expression may be used to cause gdb to terminate with the | |
1511 | value of that expression. */ | |
1512 | if (args) | |
1513 | { | |
1514 | struct value *val = parse_and_eval (args); | |
1515 | ||
1516 | exit_code = (int) value_as_long (val); | |
1517 | } | |
1518 | ||
365c70b1 JJ |
1519 | qt.args = args; |
1520 | qt.from_tty = from_tty; | |
1521 | ||
b0abbc58 | 1522 | /* We want to handle any quit errors and exit regardless. */ |
365c70b1 | 1523 | catch_errors (quit_target, &qt, |
b0abbc58 JJ |
1524 | "Quitting: ", RETURN_MASK_ALL); |
1525 | ||
9e0b60a8 JM |
1526 | exit (exit_code); |
1527 | } | |
1528 | ||
9e0b60a8 JM |
1529 | /* Returns whether GDB is running on a terminal and whether the user |
1530 | desires that questions be asked of them on that terminal. */ | |
1531 | ||
1532 | int | |
fba45db2 | 1533 | input_from_terminal_p (void) |
9e0b60a8 JM |
1534 | { |
1535 | return gdb_has_a_terminal () && (instream == stdin) & caution; | |
1536 | } | |
1537 | \f | |
9e0b60a8 | 1538 | static void |
fba45db2 | 1539 | dont_repeat_command (char *ignored, int from_tty) |
9e0b60a8 | 1540 | { |
c5aa993b JM |
1541 | *line = 0; /* Can't call dont_repeat here because we're not |
1542 | necessarily reading from stdin. */ | |
9e0b60a8 JM |
1543 | } |
1544 | \f | |
1545 | /* Functions to manipulate command line editing control variables. */ | |
1546 | ||
1547 | /* Number of commands to print in each call to show_commands. */ | |
1548 | #define Hist_print 10 | |
d318976c | 1549 | void |
fba45db2 | 1550 | show_commands (char *args, int from_tty) |
9e0b60a8 JM |
1551 | { |
1552 | /* Index for history commands. Relative to history_base. */ | |
1553 | int offset; | |
1554 | ||
1555 | /* Number of the history entry which we are planning to display next. | |
1556 | Relative to history_base. */ | |
1557 | static int num = 0; | |
1558 | ||
1559 | /* The first command in the history which doesn't exist (i.e. one more | |
1560 | than the number of the last command). Relative to history_base. */ | |
1561 | int hist_len; | |
1562 | ||
9e0b60a8 JM |
1563 | /* Print out some of the commands from the command history. */ |
1564 | /* First determine the length of the history list. */ | |
1565 | hist_len = history_size; | |
1566 | for (offset = 0; offset < history_size; offset++) | |
1567 | { | |
1568 | if (!history_get (history_base + offset)) | |
1569 | { | |
1570 | hist_len = offset; | |
1571 | break; | |
1572 | } | |
1573 | } | |
1574 | ||
1575 | if (args) | |
1576 | { | |
1577 | if (args[0] == '+' && args[1] == '\0') | |
1578 | /* "info editing +" should print from the stored position. */ | |
1579 | ; | |
1580 | else | |
1581 | /* "info editing <exp>" should print around command number <exp>. */ | |
0e828ed1 | 1582 | num = (parse_and_eval_long (args) - history_base) - Hist_print / 2; |
9e0b60a8 JM |
1583 | } |
1584 | /* "show commands" means print the last Hist_print commands. */ | |
1585 | else | |
1586 | { | |
1587 | num = hist_len - Hist_print; | |
1588 | } | |
1589 | ||
1590 | if (num < 0) | |
1591 | num = 0; | |
1592 | ||
1593 | /* If there are at least Hist_print commands, we want to display the last | |
1594 | Hist_print rather than, say, the last 6. */ | |
1595 | if (hist_len - num < Hist_print) | |
1596 | { | |
1597 | num = hist_len - Hist_print; | |
1598 | if (num < 0) | |
1599 | num = 0; | |
1600 | } | |
1601 | ||
1602 | for (offset = num; offset < num + Hist_print && offset < hist_len; offset++) | |
1603 | { | |
1604 | printf_filtered ("%5d %s\n", history_base + offset, | |
c5aa993b | 1605 | (history_get (history_base + offset))->line); |
9e0b60a8 JM |
1606 | } |
1607 | ||
1608 | /* The next command we want to display is the next one that we haven't | |
1609 | displayed yet. */ | |
1610 | num += Hist_print; | |
1611 | ||
1612 | /* If the user repeats this command with return, it should do what | |
1613 | "show commands +" does. This is unnecessary if arg is null, | |
1614 | because "show commands +" is not useful after "show commands". */ | |
1615 | if (from_tty && args) | |
1616 | { | |
1617 | args[0] = '+'; | |
1618 | args[1] = '\0'; | |
1619 | } | |
1620 | } | |
1621 | ||
1622 | /* Called by do_setshow_command. */ | |
9e0b60a8 | 1623 | static void |
fba45db2 | 1624 | set_history_size_command (char *args, int from_tty, struct cmd_list_element *c) |
9e0b60a8 JM |
1625 | { |
1626 | if (history_size == INT_MAX) | |
1627 | unstifle_history (); | |
1628 | else if (history_size >= 0) | |
1629 | stifle_history (history_size); | |
1630 | else | |
1631 | { | |
1632 | history_size = INT_MAX; | |
1633 | error ("History size must be non-negative"); | |
1634 | } | |
1635 | } | |
1636 | ||
d318976c | 1637 | void |
fba45db2 | 1638 | set_history (char *args, int from_tty) |
9e0b60a8 JM |
1639 | { |
1640 | printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n"); | |
1641 | help_list (sethistlist, "set history ", -1, gdb_stdout); | |
1642 | } | |
1643 | ||
d318976c | 1644 | void |
fba45db2 | 1645 | show_history (char *args, int from_tty) |
9e0b60a8 JM |
1646 | { |
1647 | cmd_show_list (showhistlist, from_tty, ""); | |
1648 | } | |
1649 | ||
1650 | int info_verbose = 0; /* Default verbose msgs off */ | |
1651 | ||
1652 | /* Called by do_setshow_command. An elaborate joke. */ | |
d318976c | 1653 | void |
fba45db2 | 1654 | set_verbose (char *args, int from_tty, struct cmd_list_element *c) |
9e0b60a8 JM |
1655 | { |
1656 | char *cmdname = "verbose"; | |
1657 | struct cmd_list_element *showcmd; | |
1658 | ||
1659 | showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1); | |
1660 | ||
1661 | if (info_verbose) | |
1662 | { | |
1663 | c->doc = "Set verbose printing of informational messages."; | |
1664 | showcmd->doc = "Show verbose printing of informational messages."; | |
1665 | } | |
1666 | else | |
1667 | { | |
1668 | c->doc = "Set verbosity."; | |
1669 | showcmd->doc = "Show verbosity."; | |
1670 | } | |
1671 | } | |
1672 | ||
9e0b60a8 JM |
1673 | /* Init the history buffer. Note that we are called after the init file(s) |
1674 | * have been read so that the user can change the history file via his | |
1675 | * .gdbinit file (for instance). The GDBHISTFILE environment variable | |
1676 | * overrides all of this. | |
1677 | */ | |
1678 | ||
1679 | void | |
fba45db2 | 1680 | init_history (void) |
9e0b60a8 JM |
1681 | { |
1682 | char *tmpenv; | |
1683 | ||
1684 | tmpenv = getenv ("HISTSIZE"); | |
1685 | if (tmpenv) | |
1686 | history_size = atoi (tmpenv); | |
1687 | else if (!history_size) | |
1688 | history_size = 256; | |
1689 | ||
1690 | stifle_history (history_size); | |
1691 | ||
1692 | tmpenv = getenv ("GDBHISTFILE"); | |
1693 | if (tmpenv) | |
c5aa993b JM |
1694 | history_filename = savestring (tmpenv, strlen (tmpenv)); |
1695 | else if (!history_filename) | |
1696 | { | |
1697 | /* We include the current directory so that if the user changes | |
1698 | directories the file written will be the same as the one | |
1699 | that was read. */ | |
a0b3c4fd | 1700 | #ifdef __MSDOS__ |
eb2f494a AC |
1701 | /* No leading dots in file names are allowed on MSDOS. */ |
1702 | history_filename = concat (current_directory, "/_gdb_history", NULL); | |
a0b3c4fd | 1703 | #else |
c5aa993b | 1704 | history_filename = concat (current_directory, "/.gdb_history", NULL); |
a0b3c4fd | 1705 | #endif |
c5aa993b | 1706 | } |
9e0b60a8 JM |
1707 | read_history (history_filename); |
1708 | } | |
1709 | ||
1710 | static void | |
fba45db2 | 1711 | init_main (void) |
9e0b60a8 JM |
1712 | { |
1713 | struct cmd_list_element *c; | |
1714 | ||
1715 | /* If we are running the asynchronous version, | |
1716 | we initialize the prompts differently. */ | |
6426a772 | 1717 | if (!event_loop_p) |
9e0b60a8 | 1718 | { |
c5aa993b | 1719 | gdb_prompt_string = savestring (DEFAULT_PROMPT, strlen (DEFAULT_PROMPT)); |
9e0b60a8 JM |
1720 | } |
1721 | else | |
1722 | { | |
1723 | /* initialize the prompt stack to a simple "(gdb) " prompt or to | |
96baa820 | 1724 | whatever the DEFAULT_PROMPT is. */ |
9e0b60a8 | 1725 | the_prompts.top = 0; |
c5aa993b | 1726 | PREFIX (0) = ""; |
c5aa993b | 1727 | PROMPT (0) = savestring (DEFAULT_PROMPT, strlen (DEFAULT_PROMPT)); |
c5aa993b | 1728 | SUFFIX (0) = ""; |
9e0b60a8 | 1729 | /* Set things up for annotation_level > 1, if the user ever decides |
c5aa993b | 1730 | to use it. */ |
9e0b60a8 JM |
1731 | async_annotation_suffix = "prompt"; |
1732 | /* Set the variable associated with the setshow prompt command. */ | |
1733 | new_async_prompt = savestring (PROMPT (0), strlen (PROMPT (0))); | |
0191bed7 EZ |
1734 | |
1735 | /* If gdb was started with --annotate=2, this is equivalent to | |
1736 | the user entering the command 'set annotate 2' at the gdb | |
1737 | prompt, so we need to do extra processing. */ | |
1738 | if (annotation_level > 1) | |
1739 | set_async_annotation_level (NULL, 0, NULL); | |
9e0b60a8 | 1740 | } |
9e0b60a8 JM |
1741 | |
1742 | /* Set the important stuff up for command editing. */ | |
1743 | command_editing_p = 1; | |
9e0b60a8 JM |
1744 | history_expansion_p = 0; |
1745 | write_history_p = 0; | |
1746 | ||
1747 | /* Setup important stuff for command line editing. */ | |
38017ce8 | 1748 | rl_completion_entry_function = readline_line_completion_function; |
51065942 | 1749 | rl_completer_word_break_characters = default_word_break_characters (); |
d318976c | 1750 | rl_completer_quote_characters = get_gdb_completer_quote_characters (); |
9e0b60a8 | 1751 | rl_readline_name = "gdb"; |
7cb3ec5e | 1752 | rl_terminal_name = getenv ("TERM"); |
9e0b60a8 | 1753 | |
467d8519 TT |
1754 | /* The name for this defun comes from Bash, where it originated. |
1755 | 15 is Control-o, the same binding this function has in Bash. */ | |
1756 | rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15); | |
1757 | ||
9e0b60a8 JM |
1758 | /* The set prompt command is different depending whether or not the |
1759 | async version is run. NOTE: this difference is going to | |
1760 | disappear as we make the event loop be the default engine of | |
1761 | gdb. */ | |
6426a772 | 1762 | if (!event_loop_p) |
9e0b60a8 JM |
1763 | { |
1764 | add_show_from_set | |
c5aa993b | 1765 | (add_set_cmd ("prompt", class_support, var_string, |
9e0b60a8 JM |
1766 | (char *) &gdb_prompt_string, "Set gdb's prompt", |
1767 | &setlist), | |
1768 | &showlist); | |
1769 | } | |
1770 | else | |
1771 | { | |
c5aa993b JM |
1772 | c = add_set_cmd ("prompt", class_support, var_string, |
1773 | (char *) &new_async_prompt, "Set gdb's prompt", | |
9e0b60a8 JM |
1774 | &setlist); |
1775 | add_show_from_set (c, &showlist); | |
9f60d481 | 1776 | set_cmd_sfunc (c, set_async_prompt); |
9e0b60a8 JM |
1777 | } |
1778 | ||
9e0b60a8 JM |
1779 | add_com ("dont-repeat", class_support, dont_repeat_command, "Don't repeat this command.\n\ |
1780 | Primarily used inside of user-defined commands that should not be repeated when\n\ | |
1781 | hitting return."); | |
1782 | ||
9e0b60a8 JM |
1783 | /* The set editing command is different depending whether or not the |
1784 | async version is run. NOTE: this difference is going to disappear | |
1785 | as we make the event loop be the default engine of gdb. */ | |
6426a772 | 1786 | if (!event_loop_p) |
9e0b60a8 JM |
1787 | { |
1788 | add_show_from_set | |
c5aa993b | 1789 | (add_set_cmd ("editing", class_support, var_boolean, (char *) &command_editing_p, |
9e0b60a8 JM |
1790 | "Set editing of command lines as they are typed.\n\ |
1791 | Use \"on\" to enable the editing, and \"off\" to disable it.\n\ | |
1792 | Without an argument, command line editing is enabled. To edit, use\n\ | |
1793 | EMACS-like or VI-like commands like control-P or ESC.", &setlist), | |
1794 | &showlist); | |
1795 | } | |
1796 | else | |
1797 | { | |
c5aa993b | 1798 | c = add_set_cmd ("editing", class_support, var_boolean, (char *) &async_command_editing_p, |
9e0b60a8 JM |
1799 | "Set editing of command lines as they are typed.\n\ |
1800 | Use \"on\" to enable the editing, and \"off\" to disable it.\n\ | |
1801 | Without an argument, command line editing is enabled. To edit, use\n\ | |
1802 | EMACS-like or VI-like commands like control-P or ESC.", &setlist); | |
1803 | ||
1804 | add_show_from_set (c, &showlist); | |
9f60d481 | 1805 | set_cmd_sfunc (c, set_async_editing_command); |
9e0b60a8 JM |
1806 | } |
1807 | ||
9e0b60a8 | 1808 | add_show_from_set |
c5aa993b JM |
1809 | (add_set_cmd ("save", no_class, var_boolean, (char *) &write_history_p, |
1810 | "Set saving of the history record on exit.\n\ | |
9e0b60a8 JM |
1811 | Use \"on\" to enable the saving, and \"off\" to disable it.\n\ |
1812 | Without an argument, saving is enabled.", &sethistlist), | |
1813 | &showhistlist); | |
1814 | ||
c5aa993b | 1815 | c = add_set_cmd ("size", no_class, var_integer, (char *) &history_size, |
d4654627 | 1816 | "Set the size of the command history,\n\ |
9e0b60a8 JM |
1817 | ie. the number of previous commands to keep a record of.", &sethistlist); |
1818 | add_show_from_set (c, &showhistlist); | |
9f60d481 | 1819 | set_cmd_sfunc (c, set_history_size_command); |
9e0b60a8 | 1820 | |
7a1bd56a EZ |
1821 | c = add_set_cmd ("filename", no_class, var_filename, |
1822 | (char *) &history_filename, | |
1823 | "Set the filename in which to record the command history\n\ | |
d4654627 | 1824 | (the list of previous commands of which a record is kept).", &sethistlist); |
5ba2abeb | 1825 | set_cmd_completer (c, filename_completer); |
7a1bd56a | 1826 | add_show_from_set (c, &showhistlist); |
9e0b60a8 JM |
1827 | |
1828 | add_show_from_set | |
1829 | (add_set_cmd ("confirm", class_support, var_boolean, | |
c5aa993b | 1830 | (char *) &caution, |
9e0b60a8 JM |
1831 | "Set whether to confirm potentially dangerous operations.", |
1832 | &setlist), | |
1833 | &showlist); | |
1834 | ||
9e0b60a8 JM |
1835 | /* The set annotate command is different depending whether or not |
1836 | the async version is run. NOTE: this difference is going to | |
1837 | disappear as we make the event loop be the default engine of | |
1838 | gdb. */ | |
6426a772 | 1839 | if (!event_loop_p) |
9e0b60a8 | 1840 | { |
c5aa993b JM |
1841 | c = add_set_cmd ("annotate", class_obscure, var_zinteger, |
1842 | (char *) &annotation_level, "Set annotation_level.\n\ | |
9e0b60a8 JM |
1843 | 0 == normal; 1 == fullname (for use when running under emacs)\n\ |
1844 | 2 == output annotated suitably for use by programs that control GDB.", | |
1845 | &setlist); | |
1846 | c = add_show_from_set (c, &showlist); | |
1847 | } | |
1848 | else | |
1849 | { | |
c5aa993b JM |
1850 | c = add_set_cmd ("annotate", class_obscure, var_zinteger, |
1851 | (char *) &annotation_level, "Set annotation_level.\n\ | |
9e0b60a8 JM |
1852 | 0 == normal; 1 == fullname (for use when running under emacs)\n\ |
1853 | 2 == output annotated suitably for use by programs that control GDB.", | |
c5aa993b | 1854 | &setlist); |
9e0b60a8 | 1855 | add_show_from_set (c, &showlist); |
9f60d481 | 1856 | set_cmd_sfunc (c, set_async_annotation_level); |
9e0b60a8 | 1857 | } |
6426a772 | 1858 | if (event_loop_p) |
104c1213 JM |
1859 | { |
1860 | add_show_from_set | |
1861 | (add_set_cmd ("exec-done-display", class_support, var_boolean, (char *) &exec_done_display_p, | |
1862 | "Set notification of completion for asynchronous execution commands.\n\ | |
1863 | Use \"on\" to enable the notification, and \"off\" to disable it.", &setlist), | |
1864 | &showlist); | |
1865 | } | |
9e0b60a8 | 1866 | } |
64cdedad EZ |
1867 | |
1868 | void | |
1869 | gdb_init (char *argv0) | |
1870 | { | |
1871 | if (pre_init_ui_hook) | |
1872 | pre_init_ui_hook (); | |
1873 | ||
1874 | /* Run the init function of each source file */ | |
1875 | ||
1876 | getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)); | |
1877 | current_directory = gdb_dirbuf; | |
1878 | ||
1879 | #ifdef __MSDOS__ | |
1880 | /* Make sure we return to the original directory upon exit, come | |
1881 | what may, since the OS doesn't do that for us. */ | |
1882 | make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory)); | |
1883 | #endif | |
1884 | ||
1885 | init_cmd_lists (); /* This needs to be done first */ | |
1886 | initialize_targets (); /* Setup target_terminal macros for utils.c */ | |
1887 | initialize_utils (); /* Make errors and warnings possible */ | |
1888 | initialize_all_files (); | |
1889 | initialize_current_architecture (); | |
1890 | init_cli_cmds(); | |
1891 | init_main (); /* But that omits this file! Do it now */ | |
1892 | ||
1893 | /* The signal handling mechanism is different depending whether or | |
1894 | not the async version is run. NOTE: in the future we plan to make | |
1895 | the event loop be the default engine of gdb, and this difference | |
1896 | will disappear. */ | |
1897 | if (event_loop_p) | |
1898 | async_init_signals (); | |
1899 | else | |
1900 | init_signals (); | |
1901 | ||
1902 | /* We need a default language for parsing expressions, so simple things like | |
1903 | "set width 0" won't fail if no language is explicitly set in a config file | |
1904 | or implicitly set by reading an executable during startup. */ | |
1905 | set_language (language_c); | |
1906 | expected_language = current_language; /* don't warn about the change. */ | |
1907 | ||
1ad24239 KS |
1908 | /* Allow another UI to initialize. If the UI fails to initialize, and |
1909 | it wants GDB to revert to the CLI, it should clear init_ui_hook. */ | |
1910 | if (init_ui_hook) | |
1911 | init_ui_hook (argv0); | |
64cdedad | 1912 | } |