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" | |
60250e8b | 33 | #include "exceptions.h" |
042be3a9 | 34 | #include <signal.h> |
c906108c SS |
35 | #include "target.h" |
36 | #include "breakpoint.h" | |
37 | #include "gdbtypes.h" | |
38 | #include "expression.h" | |
39 | #include "value.h" | |
40 | #include "language.h" | |
c5aa993b | 41 | #include "terminal.h" /* For job_control. */ |
c906108c | 42 | #include "annotate.h" |
c5f0f3d0 | 43 | #include "completer.h" |
c906108c | 44 | #include "top.h" |
d4f3574e | 45 | #include "version.h" |
210661e7 | 46 | #include "serial.h" |
d16aafd8 | 47 | #include "doublest.h" |
f9c696d2 | 48 | #include "gdb_assert.h" |
c906108c SS |
49 | |
50 | /* readline include files */ | |
dbda9972 AC |
51 | #include "readline/readline.h" |
52 | #include "readline/history.h" | |
c906108c SS |
53 | |
54 | /* readline defines this. */ | |
55 | #undef savestring | |
56 | ||
57 | #include <sys/types.h> | |
c906108c | 58 | |
c2c6d25f | 59 | #include "event-top.h" |
c906108c SS |
60 | #include "gdb_string.h" |
61 | #include "gdb_stat.h" | |
62 | #include <ctype.h> | |
8b93c638 JM |
63 | #include "ui-out.h" |
64 | #include "cli-out.h" | |
c906108c | 65 | |
104c1213 JM |
66 | /* Default command line prompt. This is overriden in some configs. */ |
67 | ||
68 | #ifndef DEFAULT_PROMPT | |
69 | #define DEFAULT_PROMPT "(gdb) " | |
c906108c SS |
70 | #endif |
71 | ||
72 | /* Initialization file name for gdb. This is overridden in some configs. */ | |
73 | ||
74 | #ifndef GDBINIT_FILENAME | |
75 | #define GDBINIT_FILENAME ".gdbinit" | |
76 | #endif | |
77 | char gdbinit[] = GDBINIT_FILENAME; | |
78 | ||
79 | int inhibit_gdbinit = 0; | |
80 | ||
81 | /* If nonzero, and GDB has been configured to be able to use windows, | |
82 | attempt to open them upon startup. */ | |
83 | ||
f15ab4a7 | 84 | int use_windows = 0; |
c906108c | 85 | |
c906108c SS |
86 | extern char lang_frame_mismatch_warn[]; /* language.c */ |
87 | ||
88 | /* Flag for whether we want all the "from_tty" gubbish printed. */ | |
89 | ||
c5aa993b | 90 | int caution = 1; /* Default is yes, sigh. */ |
c906108c | 91 | |
c906108c SS |
92 | /* stdio stream that command input is being read from. Set to stdin normally. |
93 | Set by source_command to the file we are sourcing. Set to NULL if we are | |
94 | executing a user-defined command or interacting via a GUI. */ | |
95 | ||
96 | FILE *instream; | |
97 | ||
98 | /* Current working directory. */ | |
99 | ||
100 | char *current_directory; | |
101 | ||
102 | /* The directory name is actually stored here (usually). */ | |
103 | char gdb_dirbuf[1024]; | |
104 | ||
105 | /* Function to call before reading a command, if nonzero. | |
106 | The function receives two args: an input stream, | |
107 | and a prompt string. */ | |
108 | ||
507f3c78 | 109 | void (*window_hook) (FILE *, char *); |
c906108c SS |
110 | |
111 | int epoch_interface; | |
112 | int xgdb_verbose; | |
113 | ||
114 | /* gdb prints this when reading a command interactively */ | |
c5aa993b | 115 | static char *gdb_prompt_string; /* the global prompt string */ |
c906108c SS |
116 | |
117 | /* Buffer used for reading command lines, and the size | |
118 | allocated for it so far. */ | |
119 | ||
120 | char *line; | |
121 | int linesize = 100; | |
122 | ||
123 | /* Nonzero if the current command is modified by "server ". This | |
c2d11a7d | 124 | affects things like recording into the command history, commands |
c906108c SS |
125 | repeating on RETURN, etc. This is so a user interface (emacs, GUI, |
126 | whatever) can issue its own commands and also send along commands | |
127 | from the user, and have the user not notice that the user interface | |
128 | is issuing commands too. */ | |
129 | int server_command; | |
130 | ||
131 | /* Baud rate specified for talking to serial target systems. Default | |
132 | is left as -1, so targets can choose their own defaults. */ | |
133 | /* FIXME: This means that "show remotebaud" and gr_files_info can print -1 | |
134 | or (unsigned int)-1. This is a Bad User Interface. */ | |
135 | ||
136 | int baud_rate = -1; | |
137 | ||
138 | /* Timeout limit for response from target. */ | |
139 | ||
ce808e91 AC |
140 | /* The default value has been changed many times over the years. It |
141 | was originally 5 seconds. But that was thought to be a long time | |
142 | to sit and wait, so it was changed to 2 seconds. That was thought | |
143 | to be plenty unless the connection was going through some terminal | |
144 | server or multiplexer or other form of hairy serial connection. | |
145 | ||
146 | In mid-1996, remote_timeout was moved from remote.c to top.c and | |
147 | it began being used in other remote-* targets. It appears that the | |
148 | default was changed to 20 seconds at that time, perhaps because the | |
85a453d5 | 149 | Renesas E7000 ICE didn't always respond in a timely manner. |
ce808e91 AC |
150 | |
151 | But if 5 seconds is a long time to sit and wait for retransmissions, | |
152 | 20 seconds is far worse. This demonstrates the difficulty of using | |
153 | a single variable for all protocol timeouts. | |
154 | ||
155 | As remote.c is used much more than remote-e7000.c, it was changed | |
156 | back to 2 seconds in 1999. */ | |
157 | ||
158 | int remote_timeout = 2; | |
c906108c SS |
159 | |
160 | /* Non-zero tells remote* modules to output debugging info. */ | |
161 | ||
162 | int remote_debug = 0; | |
163 | ||
43ff13b4 JM |
164 | /* Non-zero means the target is running. Note: this is different from |
165 | saying that there is an active target and we are stopped at a | |
166 | breakpoint, for instance. This is a real indicator whether the | |
167 | target is off and running, which gdb is doing something else. */ | |
168 | int target_executing = 0; | |
169 | ||
c906108c SS |
170 | /* Level of control structure. */ |
171 | static int control_level; | |
172 | ||
6dd77b81 RH |
173 | /* Sbrk location on entry to main. Used for statistics only. */ |
174 | #ifdef HAVE_SBRK | |
175 | char *lim_at_start; | |
176 | #endif | |
177 | ||
c906108c SS |
178 | /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */ |
179 | ||
180 | #ifndef STOP_SIGNAL | |
181 | #ifdef SIGTSTP | |
182 | #define STOP_SIGNAL SIGTSTP | |
a14ed312 | 183 | static void stop_sig (int); |
c906108c SS |
184 | #endif |
185 | #endif | |
186 | ||
c906108c SS |
187 | /* Hooks for alternate command interfaces. */ |
188 | ||
189 | /* Called after most modules have been initialized, but before taking users | |
1ad24239 KS |
190 | command file. |
191 | ||
192 | If the UI fails to initialize and it wants GDB to continue | |
193 | using the default UI, then it should clear this hook before returning. */ | |
c906108c | 194 | |
9a4105ab | 195 | void (*deprecated_init_ui_hook) (char *argv0); |
7a292a7a SS |
196 | |
197 | /* This hook is called from within gdb's many mini-event loops which could | |
198 | steal control from a real user interface's event loop. It returns | |
199 | non-zero if the user is requesting a detach, zero otherwise. */ | |
200 | ||
98bbd631 | 201 | int (*deprecated_ui_loop_hook) (int); |
c906108c SS |
202 | |
203 | /* Called instead of command_loop at top level. Can be invoked via | |
b5a2688f | 204 | throw_exception(). */ |
c906108c | 205 | |
9a4105ab | 206 | void (*deprecated_command_loop_hook) (void); |
c906108c SS |
207 | |
208 | ||
c906108c SS |
209 | /* Called from print_frame_info to list the line we stopped in. */ |
210 | ||
9a4105ab AC |
211 | void (*deprecated_print_frame_info_listing_hook) (struct symtab * s, int line, |
212 | int stopline, int noerror); | |
c906108c SS |
213 | /* Replaces most of query. */ |
214 | ||
9a4105ab | 215 | int (*deprecated_query_hook) (const char *, va_list); |
c906108c SS |
216 | |
217 | /* Replaces most of warning. */ | |
218 | ||
9a4105ab | 219 | void (*deprecated_warning_hook) (const char *, va_list); |
c906108c | 220 | |
9a4105ab AC |
221 | /* These three functions support getting lines of text from the user. |
222 | They are used in sequence. First deprecated_readline_begin_hook is | |
223 | called with a text string that might be (for example) a message for | |
224 | the user to type in a sequence of commands to be executed at a | |
225 | breakpoint. If this function calls back to a GUI, it might take | |
226 | this opportunity to pop up a text interaction window with this | |
227 | message. Next, deprecated_readline_hook is called with a prompt | |
228 | that is emitted prior to collecting the user input. It can be | |
229 | called multiple times. Finally, deprecated_readline_end_hook is | |
230 | called to notify the GUI that we are done with the interaction | |
231 | window and it can close it. */ | |
c906108c | 232 | |
9a4105ab AC |
233 | void (*deprecated_readline_begin_hook) (char *, ...); |
234 | char *(*deprecated_readline_hook) (char *); | |
235 | void (*deprecated_readline_end_hook) (void); | |
c906108c SS |
236 | |
237 | /* Called as appropriate to notify the interface of the specified breakpoint | |
238 | conditions. */ | |
239 | ||
9a4105ab AC |
240 | void (*deprecated_create_breakpoint_hook) (struct breakpoint * bpt); |
241 | void (*deprecated_delete_breakpoint_hook) (struct breakpoint * bpt); | |
242 | void (*deprecated_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 | ||
9a4105ab AC |
247 | void (*deprecated_attach_hook) (void); |
248 | void (*deprecated_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 | ||
9a4105ab | 253 | void (*deprecated_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 | ||
9a4105ab | 258 | void (*deprecated_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). */ |
9a4105ab | 263 | void (*deprecated_register_changed_hook) (int regno); |
c906108c SS |
264 | |
265 | /* Tell the GUI someone changed LEN bytes of memory at ADDR */ | |
9a4105ab | 266 | void (*deprecated_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 | ||
9a4105ab AC |
271 | ptid_t (*deprecated_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 | ||
9a4105ab AC |
277 | void (*deprecated_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 | ||
9a4105ab | 283 | void (*deprecated_set_hook) (struct cmd_list_element * c); |
96baa820 | 284 | |
c906108c SS |
285 | /* Called when the current thread changes. Argument is thread id. */ |
286 | ||
9a4105ab | 287 | void (*deprecated_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 | ||
c40d0d10 | 292 | void (*deprecated_error_hook) (void); |
11cf8741 | 293 | |
c906108c SS |
294 | /* Handler for SIGHUP. */ |
295 | ||
296 | #ifdef SIGHUP | |
392a587b | 297 | /* NOTE 1999-04-29: This function will be static again, once we modify |
cd0fc7c3 SS |
298 | gdb to use the event loop as the default command loop and we merge |
299 | event-top.c into this file, top.c */ | |
300 | /* static */ int | |
d0c8cdfb | 301 | quit_cover (void *s) |
c906108c | 302 | { |
c5aa993b JM |
303 | caution = 0; /* Throw caution to the wind -- we're exiting. |
304 | This prevents asking the user dumb questions. */ | |
305 | quit_command ((char *) 0, 0); | |
c906108c SS |
306 | return 0; |
307 | } | |
308 | #endif /* defined SIGHUP */ | |
309 | \f | |
310 | /* Line number we are currently in in a file which is being sourced. */ | |
392a587b | 311 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
cd0fc7c3 SS |
312 | gdb to use the event loop as the default command loop and we merge |
313 | event-top.c into this file, top.c */ | |
314 | /* static */ int source_line_number; | |
c906108c SS |
315 | |
316 | /* Name of the file we are sourcing. */ | |
392a587b | 317 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
cd0fc7c3 SS |
318 | gdb to use the event loop as the default command loop and we merge |
319 | event-top.c into this file, top.c */ | |
320 | /* static */ char *source_file_name; | |
c906108c SS |
321 | |
322 | /* Buffer containing the error_pre_print used by the source stuff. | |
323 | Malloc'd. */ | |
392a587b | 324 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
cd0fc7c3 SS |
325 | gdb to use the event loop as the default command loop and we merge |
326 | event-top.c into this file, top.c */ | |
327 | /* static */ char *source_error; | |
c906108c SS |
328 | static int source_error_allocated; |
329 | ||
330 | /* Something to glom on to the start of error_pre_print if source_file_name | |
331 | is set. */ | |
392a587b | 332 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
cd0fc7c3 SS |
333 | gdb to use the event loop as the default command loop and we merge |
334 | event-top.c into this file, top.c */ | |
335 | /* static */ char *source_pre_error; | |
c906108c SS |
336 | |
337 | /* Clean up on error during a "source" command (or execution of a | |
338 | user-defined command). */ | |
339 | ||
d318976c | 340 | void |
e41a3b1a | 341 | do_restore_instream_cleanup (void *stream) |
c906108c SS |
342 | { |
343 | /* Restore the previous input stream. */ | |
344 | instream = stream; | |
345 | } | |
346 | ||
347 | /* Read commands from STREAM. */ | |
348 | void | |
fba45db2 | 349 | read_command_file (FILE *stream) |
c906108c SS |
350 | { |
351 | struct cleanup *cleanups; | |
352 | ||
e41a3b1a | 353 | cleanups = make_cleanup (do_restore_instream_cleanup, instream); |
c906108c | 354 | instream = stream; |
c5aa993b | 355 | command_loop (); |
c906108c SS |
356 | do_cleanups (cleanups); |
357 | } | |
358 | \f | |
507f3c78 | 359 | void (*pre_init_ui_hook) (void); |
c906108c | 360 | |
e41a3b1a AC |
361 | #ifdef __MSDOS__ |
362 | void | |
363 | do_chdir_cleanup (void *old_dir) | |
364 | { | |
365 | chdir (old_dir); | |
b8c9b27d | 366 | xfree (old_dir); |
e41a3b1a AC |
367 | } |
368 | #endif | |
369 | ||
d318976c FN |
370 | /* Execute the line P as a command. |
371 | Pass FROM_TTY as second argument to the defining function. */ | |
c906108c | 372 | |
d318976c FN |
373 | void |
374 | execute_command (char *p, int from_tty) | |
c906108c | 375 | { |
52f0bd74 AC |
376 | struct cmd_list_element *c; |
377 | enum language flang; | |
d318976c FN |
378 | static int warned = 0; |
379 | char *line; | |
67e1e03a | 380 | |
d318976c | 381 | free_all_values (); |
c906108c | 382 | |
d318976c FN |
383 | /* Force cleanup of any alloca areas if using C alloca instead of |
384 | a builtin alloca. */ | |
385 | alloca (0); | |
c906108c | 386 | |
d318976c FN |
387 | /* This can happen when command_line_input hits end of file. */ |
388 | if (p == NULL) | |
389 | return; | |
c906108c | 390 | |
d318976c | 391 | serial_log_command (p); |
8b93c638 | 392 | |
d318976c FN |
393 | while (*p == ' ' || *p == '\t') |
394 | p++; | |
395 | if (*p) | |
8b93c638 | 396 | { |
d318976c FN |
397 | char *arg; |
398 | line = p; | |
8b93c638 | 399 | |
d318976c | 400 | c = lookup_cmd (&p, cmdlist, "", 0, 1); |
8b93c638 | 401 | |
d318976c FN |
402 | /* If the target is running, we allow only a limited set of |
403 | commands. */ | |
362646f5 | 404 | if (target_can_async_p () && target_executing) |
d8fe84e3 EZ |
405 | if (strcmp (c->name, "help") != 0 |
406 | && strcmp (c->name, "pwd") != 0 | |
407 | && strcmp (c->name, "show") != 0 | |
408 | && strcmp (c->name, "stop") != 0) | |
d318976c | 409 | error ("Cannot execute this command while the target is running."); |
8b93c638 | 410 | |
d318976c FN |
411 | /* Pass null arg rather than an empty one. */ |
412 | arg = *p ? p : 0; | |
8b93c638 | 413 | |
9f60d481 AC |
414 | /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy |
415 | while the is_complete_command(cfunc) test is just plain | |
416 | bogus. They should both be replaced by a test of the form | |
417 | c->strip_trailing_white_space_p. */ | |
418 | /* NOTE: cagney/2002-02-02: The function.cfunc in the below | |
419 | can't be replaced with func. This is because it is the | |
420 | cfunc, and not the func, that has the value that the | |
421 | is_complete_command hack is testing for. */ | |
422 | /* Clear off trailing whitespace, except for set and complete | |
423 | command. */ | |
d318976c FN |
424 | if (arg |
425 | && c->type != set_cmd | |
bbaca940 | 426 | && !is_complete_command (c)) |
8b93c638 | 427 | { |
d318976c FN |
428 | p = arg + strlen (arg) - 1; |
429 | while (p >= arg && (*p == ' ' || *p == '\t')) | |
430 | p--; | |
431 | *(p + 1) = '\0'; | |
8b93c638 JM |
432 | } |
433 | ||
d318976c | 434 | /* If this command has been pre-hooked, run the hook first. */ |
5913bcb0 | 435 | execute_cmd_pre_hook (c); |
c906108c | 436 | |
d318976c FN |
437 | if (c->flags & DEPRECATED_WARN_USER) |
438 | deprecated_cmd_warning (&line); | |
c906108c | 439 | |
d318976c FN |
440 | if (c->class == class_user) |
441 | execute_user_command (c, arg); | |
442 | else if (c->type == set_cmd || c->type == show_cmd) | |
443 | do_setshow_command (arg, from_tty & caution, c); | |
f436dd25 | 444 | else if (!cmd_func_p (c)) |
d318976c | 445 | error ("That is not a command, just a help topic."); |
9a4105ab AC |
446 | else if (deprecated_call_command_hook) |
447 | deprecated_call_command_hook (c, arg, from_tty & caution); | |
d318976c | 448 | else |
f436dd25 | 449 | cmd_func (c, arg, from_tty & caution); |
d318976c FN |
450 | |
451 | /* If this command has been post-hooked, run the hook last. */ | |
5913bcb0 | 452 | execute_cmd_post_hook (c); |
c906108c | 453 | |
c906108c SS |
454 | } |
455 | ||
d318976c FN |
456 | /* Tell the user if the language has changed (except first time). */ |
457 | if (current_language != expected_language) | |
c906108c | 458 | { |
d318976c | 459 | if (language_mode == language_mode_auto) |
c906108c | 460 | { |
d318976c | 461 | language_info (1); /* Print what changed. */ |
c906108c | 462 | } |
d318976c | 463 | warned = 0; |
c906108c SS |
464 | } |
465 | ||
d318976c FN |
466 | /* Warn the user if the working language does not match the |
467 | language of the current frame. Only warn the user if we are | |
468 | actually running the program, i.e. there is a stack. */ | |
469 | /* FIXME: This should be cacheing the frame and only running when | |
470 | the frame changes. */ | |
471 | ||
472 | if (target_has_stack) | |
c906108c | 473 | { |
d318976c FN |
474 | flang = get_frame_language (); |
475 | if (!warned | |
476 | && flang != language_unknown | |
477 | && flang != current_language->la_language) | |
c906108c | 478 | { |
d318976c FN |
479 | printf_filtered ("%s\n", lang_frame_mismatch_warn); |
480 | warned = 1; | |
c906108c | 481 | } |
c906108c SS |
482 | } |
483 | } | |
484 | ||
d318976c FN |
485 | /* Read commands from `instream' and execute them |
486 | until end of file or error reading instream. */ | |
c906108c | 487 | |
d318976c FN |
488 | void |
489 | command_loop (void) | |
c906108c | 490 | { |
d318976c FN |
491 | struct cleanup *old_chain; |
492 | char *command; | |
493 | int stdin_is_tty = ISATTY (stdin); | |
494 | long time_at_cmd_start; | |
495 | #ifdef HAVE_SBRK | |
496 | long space_at_cmd_start = 0; | |
497 | #endif | |
498 | extern int display_time; | |
499 | extern int display_space; | |
c5aa993b | 500 | |
d318976c FN |
501 | while (instream && !feof (instream)) |
502 | { | |
d318976c FN |
503 | if (window_hook && instream == stdin) |
504 | (*window_hook) (instream, get_prompt ()); | |
c906108c | 505 | |
d318976c FN |
506 | quit_flag = 0; |
507 | if (instream == stdin && stdin_is_tty) | |
508 | reinitialize_more_filter (); | |
509 | old_chain = make_cleanup (null_cleanup, 0); | |
c906108c | 510 | |
d318976c FN |
511 | /* Get a command-line. This calls the readline package. */ |
512 | command = command_line_input (instream == stdin ? | |
513 | get_prompt () : (char *) NULL, | |
514 | instream == stdin, "prompt"); | |
d318976c FN |
515 | if (command == 0) |
516 | return; | |
c906108c | 517 | |
d318976c | 518 | time_at_cmd_start = get_run_time (); |
c906108c | 519 | |
d318976c | 520 | if (display_space) |
9e0b60a8 | 521 | { |
d318976c | 522 | #ifdef HAVE_SBRK |
d318976c | 523 | char *lim = (char *) sbrk (0); |
6dd77b81 | 524 | space_at_cmd_start = lim - lim_at_start; |
9e0b60a8 | 525 | #endif |
d318976c | 526 | } |
9e0b60a8 | 527 | |
d318976c FN |
528 | execute_command (command, instream == stdin); |
529 | /* Do any commands attached to breakpoint we stopped at. */ | |
530 | bpstat_do_actions (&stop_bpstat); | |
531 | do_cleanups (old_chain); | |
9e0b60a8 | 532 | |
d318976c | 533 | if (display_time) |
9e0b60a8 | 534 | { |
d318976c | 535 | long cmd_time = get_run_time () - time_at_cmd_start; |
9e0b60a8 | 536 | |
d318976c FN |
537 | printf_unfiltered ("Command execution time: %ld.%06ld\n", |
538 | cmd_time / 1000000, cmd_time % 1000000); | |
9e0b60a8 | 539 | } |
9e0b60a8 | 540 | |
d318976c | 541 | if (display_space) |
9e0b60a8 | 542 | { |
d318976c | 543 | #ifdef HAVE_SBRK |
d318976c | 544 | char *lim = (char *) sbrk (0); |
6dd77b81 | 545 | long space_now = lim - lim_at_start; |
d318976c FN |
546 | long space_diff = space_now - space_at_cmd_start; |
547 | ||
548 | printf_unfiltered ("Space used: %ld (%c%ld for this command)\n", | |
549 | space_now, | |
550 | (space_diff >= 0 ? '+' : '-'), | |
551 | space_diff); | |
552 | #endif | |
9e0b60a8 | 553 | } |
9e0b60a8 | 554 | } |
9e0b60a8 | 555 | } |
9e0b60a8 | 556 | |
d318976c FN |
557 | /* Read commands from `instream' and execute them until end of file or |
558 | error reading instream. This command loop doesnt care about any | |
559 | such things as displaying time and space usage. If the user asks | |
560 | for those, they won't work. */ | |
561 | void | |
562 | simplified_command_loop (char *(*read_input_func) (char *), | |
563 | void (*execute_command_func) (char *, int)) | |
9e0b60a8 | 564 | { |
d318976c FN |
565 | struct cleanup *old_chain; |
566 | char *command; | |
567 | int stdin_is_tty = ISATTY (stdin); | |
9e0b60a8 | 568 | |
d318976c | 569 | while (instream && !feof (instream)) |
9e0b60a8 | 570 | { |
d318976c FN |
571 | quit_flag = 0; |
572 | if (instream == stdin && stdin_is_tty) | |
573 | reinitialize_more_filter (); | |
574 | old_chain = make_cleanup (null_cleanup, 0); | |
575 | ||
576 | /* Get a command-line. */ | |
577 | command = (*read_input_func) (instream == stdin ? | |
578 | get_prompt () : (char *) NULL); | |
9e0b60a8 | 579 | |
d318976c FN |
580 | if (command == 0) |
581 | return; | |
9e0b60a8 | 582 | |
d318976c | 583 | (*execute_command_func) (command, instream == stdin); |
9e0b60a8 | 584 | |
d318976c FN |
585 | /* Do any commands attached to breakpoint we stopped at. */ |
586 | bpstat_do_actions (&stop_bpstat); | |
9e0b60a8 | 587 | |
d318976c | 588 | do_cleanups (old_chain); |
c5aa993b | 589 | } |
9e0b60a8 | 590 | } |
d318976c FN |
591 | \f |
592 | /* Commands call this if they do not want to be repeated by null lines. */ | |
9e0b60a8 | 593 | |
d318976c FN |
594 | void |
595 | dont_repeat (void) | |
9e0b60a8 | 596 | { |
d318976c FN |
597 | if (server_command) |
598 | return; | |
9e0b60a8 | 599 | |
d318976c FN |
600 | /* If we aren't reading from standard input, we are saving the last |
601 | thing read from stdin in line and don't want to delete it. Null lines | |
602 | won't repeat here in any case. */ | |
603 | if (instream == stdin) | |
604 | *line = 0; | |
9e0b60a8 | 605 | } |
d318976c FN |
606 | \f |
607 | /* Read a line from the stream "instream" without command line editing. | |
9e0b60a8 | 608 | |
d318976c FN |
609 | It prints PROMPT_ARG once at the start. |
610 | Action is compatible with "readline", e.g. space for the result is | |
611 | malloc'd and should be freed by the caller. | |
9e0b60a8 | 612 | |
d318976c FN |
613 | A NULL return means end of file. */ |
614 | char * | |
615 | gdb_readline (char *prompt_arg) | |
9e0b60a8 | 616 | { |
d318976c FN |
617 | int c; |
618 | char *result; | |
619 | int input_index = 0; | |
620 | int result_size = 80; | |
9e0b60a8 | 621 | |
d318976c | 622 | if (prompt_arg) |
9e0b60a8 | 623 | { |
d318976c FN |
624 | /* Don't use a _filtered function here. It causes the assumed |
625 | character position to be off, since the newline we read from | |
626 | the user is not accounted for. */ | |
627 | fputs_unfiltered (prompt_arg, gdb_stdout); | |
9e0b60a8 JM |
628 | gdb_flush (gdb_stdout); |
629 | } | |
630 | ||
d318976c | 631 | result = (char *) xmalloc (result_size); |
9e0b60a8 JM |
632 | |
633 | while (1) | |
634 | { | |
d318976c FN |
635 | /* Read from stdin if we are executing a user defined command. |
636 | This is the right thing for prompt_for_continue, at least. */ | |
637 | c = fgetc (instream ? instream : stdin); | |
9e0b60a8 | 638 | |
d318976c | 639 | if (c == EOF) |
9e0b60a8 | 640 | { |
d318976c FN |
641 | if (input_index > 0) |
642 | /* The last line does not end with a newline. Return it, and | |
643 | if we are called again fgetc will still return EOF and | |
644 | we'll return NULL then. */ | |
9e0b60a8 | 645 | break; |
b8c9b27d | 646 | xfree (result); |
d318976c | 647 | return NULL; |
9e0b60a8 | 648 | } |
c5aa993b | 649 | |
d318976c | 650 | if (c == '\n') |
9e0b60a8 | 651 | { |
d318976c FN |
652 | if (input_index > 0 && result[input_index - 1] == '\r') |
653 | input_index--; | |
654 | break; | |
9e0b60a8 | 655 | } |
9e0b60a8 | 656 | |
d318976c FN |
657 | result[input_index++] = c; |
658 | while (input_index >= result_size) | |
9e0b60a8 | 659 | { |
d318976c FN |
660 | result_size *= 2; |
661 | result = (char *) xrealloc (result, result_size); | |
9e0b60a8 | 662 | } |
9e0b60a8 JM |
663 | } |
664 | ||
d318976c FN |
665 | result[input_index++] = '\0'; |
666 | return result; | |
9e0b60a8 JM |
667 | } |
668 | ||
d318976c FN |
669 | /* Variables which control command line editing and history |
670 | substitution. These variables are given default values at the end | |
671 | of this file. */ | |
672 | static int command_editing_p; | |
673 | /* NOTE 1999-04-29: This variable will be static again, once we modify | |
674 | gdb to use the event loop as the default command loop and we merge | |
675 | event-top.c into this file, top.c */ | |
676 | /* static */ int history_expansion_p; | |
677 | static int write_history_p; | |
678 | static int history_size; | |
679 | static char *history_filename; | |
9e0b60a8 | 680 | |
b4f5539f TT |
681 | /* This is like readline(), but it has some gdb-specific behavior. |
682 | gdb can use readline in both the synchronous and async modes during | |
683 | a single gdb invocation. At the ordinary top-level prompt we might | |
684 | be using the async readline. That means we can't use | |
685 | rl_pre_input_hook, since it doesn't work properly in async mode. | |
686 | However, for a secondary prompt (" >", such as occurs during a | |
687 | `define'), gdb just calls readline() directly, running it in | |
688 | synchronous mode. So for operate-and-get-next to work in this | |
689 | situation, we have to switch the hooks around. That is what | |
690 | gdb_readline_wrapper is for. */ | |
691 | char * | |
692 | gdb_readline_wrapper (char *prompt) | |
693 | { | |
694 | /* Set the hook that works in this case. */ | |
362646f5 | 695 | if (after_char_processing_hook) |
b4f5539f TT |
696 | { |
697 | rl_pre_input_hook = (Function *) after_char_processing_hook; | |
698 | after_char_processing_hook = NULL; | |
699 | } | |
700 | ||
701 | return readline (prompt); | |
702 | } | |
703 | ||
9e0b60a8 | 704 | \f |
d318976c FN |
705 | #ifdef STOP_SIGNAL |
706 | static void | |
707 | stop_sig (int signo) | |
9e0b60a8 | 708 | { |
d318976c FN |
709 | #if STOP_SIGNAL == SIGTSTP |
710 | signal (SIGTSTP, SIG_DFL); | |
46711df8 MK |
711 | #if HAVE_SIGPROCMASK |
712 | { | |
713 | sigset_t zero; | |
714 | ||
715 | sigemptyset (&zero); | |
716 | sigprocmask (SIG_SETMASK, &zero, 0); | |
717 | } | |
718 | #elif HAVE_SIGSETMASK | |
d318976c | 719 | sigsetmask (0); |
46711df8 | 720 | #endif |
d318976c FN |
721 | kill (getpid (), SIGTSTP); |
722 | signal (SIGTSTP, stop_sig); | |
723 | #else | |
724 | signal (STOP_SIGNAL, stop_sig); | |
725 | #endif | |
726 | printf_unfiltered ("%s", get_prompt ()); | |
727 | gdb_flush (gdb_stdout); | |
9e0b60a8 | 728 | |
d318976c FN |
729 | /* Forget about any previous command -- null line now will do nothing. */ |
730 | dont_repeat (); | |
9e0b60a8 | 731 | } |
d318976c | 732 | #endif /* STOP_SIGNAL */ |
9e0b60a8 | 733 | |
d318976c | 734 | /* Initialize signal handlers. */ |
64cdedad EZ |
735 | static void |
736 | float_handler (int signo) | |
737 | { | |
738 | /* This message is based on ANSI C, section 4.7. Note that integer | |
739 | divide by zero causes this, so "float" is a misnomer. */ | |
740 | signal (SIGFPE, float_handler); | |
741 | error ("Erroneous arithmetic operation."); | |
742 | } | |
743 | ||
9e0b60a8 | 744 | static void |
d318976c | 745 | do_nothing (int signo) |
9e0b60a8 | 746 | { |
d318976c FN |
747 | /* Under System V the default disposition of a signal is reinstated after |
748 | the signal is caught and delivered to an application process. On such | |
749 | systems one must restore the replacement signal handler if one wishes | |
750 | to continue handling the signal in one's program. On BSD systems this | |
751 | is not needed but it is harmless, and it simplifies the code to just do | |
752 | it unconditionally. */ | |
753 | signal (signo, do_nothing); | |
9e0b60a8 JM |
754 | } |
755 | ||
467d8519 TT |
756 | /* The current saved history number from operate-and-get-next. |
757 | This is -1 if not valid. */ | |
758 | static int operate_saved_history = -1; | |
759 | ||
760 | /* This is put on the appropriate hook and helps operate-and-get-next | |
761 | do its work. */ | |
b9362cc7 | 762 | static void |
5ae5f592 | 763 | gdb_rl_operate_and_get_next_completion (void) |
467d8519 TT |
764 | { |
765 | int delta = where_history () - operate_saved_history; | |
766 | /* The `key' argument to rl_get_previous_history is ignored. */ | |
767 | rl_get_previous_history (delta, 0); | |
768 | operate_saved_history = -1; | |
769 | ||
770 | /* readline doesn't automatically update the display for us. */ | |
771 | rl_redisplay (); | |
772 | ||
773 | after_char_processing_hook = NULL; | |
774 | rl_pre_input_hook = NULL; | |
775 | } | |
776 | ||
777 | /* This is a gdb-local readline command handler. It accepts the | |
778 | current command line (like RET does) and, if this command was taken | |
779 | from the history, arranges for the next command in the history to | |
780 | appear on the command line when the prompt returns. | |
781 | We ignore the arguments. */ | |
782 | static int | |
783 | gdb_rl_operate_and_get_next (int count, int key) | |
784 | { | |
b5686e99 MK |
785 | int where; |
786 | ||
362646f5 AC |
787 | /* Use the async hook. */ |
788 | after_char_processing_hook = gdb_rl_operate_and_get_next_completion; | |
467d8519 | 789 | |
b5686e99 MK |
790 | /* Find the current line, and find the next line to use. */ |
791 | where = where_history(); | |
792 | ||
793 | /* FIXME: kettenis/20020817: max_input_history is renamed into | |
794 | history_max_entries in readline-4.2. When we do a new readline | |
795 | import, we should probably change it here too, even though | |
796 | readline maintains backwards compatibility for now by still | |
797 | defining max_input_history. */ | |
798 | if ((history_is_stifled () && (history_length >= max_input_history)) || | |
799 | (where >= history_length - 1)) | |
800 | operate_saved_history = where; | |
801 | else | |
802 | operate_saved_history = where + 1; | |
803 | ||
467d8519 TT |
804 | return rl_newline (1, key); |
805 | } | |
806 | \f | |
d318976c FN |
807 | /* Read one line from the command input stream `instream' |
808 | into the local static buffer `linebuffer' (whose current length | |
809 | is `linelength'). | |
810 | The buffer is made bigger as necessary. | |
811 | Returns the address of the start of the line. | |
9e0b60a8 | 812 | |
d318976c | 813 | NULL is returned for end of file. |
9e0b60a8 | 814 | |
d318976c FN |
815 | *If* the instream == stdin & stdin is a terminal, the line read |
816 | is copied into the file line saver (global var char *line, | |
817 | length linesize) so that it can be duplicated. | |
9e0b60a8 | 818 | |
d318976c FN |
819 | This routine either uses fancy command line editing or |
820 | simple input as the user has requested. */ | |
10689f25 | 821 | |
d318976c FN |
822 | char * |
823 | command_line_input (char *prompt_arg, int repeat, char *annotation_suffix) | |
9e0b60a8 | 824 | { |
d318976c FN |
825 | static char *linebuffer = 0; |
826 | static unsigned linelength = 0; | |
52f0bd74 | 827 | char *p; |
d318976c FN |
828 | char *p1; |
829 | char *rl; | |
830 | char *local_prompt = prompt_arg; | |
831 | char *nline; | |
832 | char got_eof = 0; | |
833 | ||
834 | /* The annotation suffix must be non-NULL. */ | |
835 | if (annotation_suffix == NULL) | |
836 | annotation_suffix = ""; | |
9e0b60a8 | 837 | |
d318976c FN |
838 | if (annotation_level > 1 && instream == stdin) |
839 | { | |
840 | local_prompt = alloca ((prompt_arg == NULL ? 0 : strlen (prompt_arg)) | |
841 | + strlen (annotation_suffix) + 40); | |
842 | if (prompt_arg == NULL) | |
843 | local_prompt[0] = '\0'; | |
844 | else | |
845 | strcpy (local_prompt, prompt_arg); | |
846 | strcat (local_prompt, "\n\032\032"); | |
847 | strcat (local_prompt, annotation_suffix); | |
848 | strcat (local_prompt, "\n"); | |
849 | } | |
9e0b60a8 | 850 | |
d318976c | 851 | if (linebuffer == 0) |
9e0b60a8 | 852 | { |
d318976c FN |
853 | linelength = 80; |
854 | linebuffer = (char *) xmalloc (linelength); | |
9e0b60a8 | 855 | } |
9e0b60a8 | 856 | |
d318976c | 857 | p = linebuffer; |
9e0b60a8 | 858 | |
d318976c FN |
859 | /* Control-C quits instantly if typed while in this loop |
860 | since it should not wait until the user types a newline. */ | |
861 | immediate_quit++; | |
862 | #ifdef STOP_SIGNAL | |
863 | if (job_control) | |
362646f5 | 864 | signal (STOP_SIGNAL, handle_stop_sig); |
d318976c FN |
865 | #endif |
866 | ||
867 | while (1) | |
9e0b60a8 | 868 | { |
d318976c FN |
869 | /* Make sure that all output has been output. Some machines may let |
870 | you get away with leaving out some of the gdb_flush, but not all. */ | |
871 | wrap_here (""); | |
872 | gdb_flush (gdb_stdout); | |
873 | gdb_flush (gdb_stderr); | |
874 | ||
875 | if (source_file_name != NULL) | |
876 | { | |
877 | ++source_line_number; | |
878 | sprintf (source_error, | |
879 | "%s%s:%d: Error in sourced command file:\n", | |
880 | source_pre_error, | |
881 | source_file_name, | |
882 | source_line_number); | |
883 | error_pre_print = source_error; | |
884 | } | |
885 | ||
886 | if (annotation_level > 1 && instream == stdin) | |
887 | { | |
306d9ac5 DC |
888 | puts_unfiltered ("\n\032\032pre-"); |
889 | puts_unfiltered (annotation_suffix); | |
890 | puts_unfiltered ("\n"); | |
d318976c FN |
891 | } |
892 | ||
893 | /* Don't use fancy stuff if not talking to stdin. */ | |
9a4105ab | 894 | if (deprecated_readline_hook && instream == NULL) |
d318976c | 895 | { |
9a4105ab | 896 | rl = (*deprecated_readline_hook) (local_prompt); |
d318976c FN |
897 | } |
898 | else if (command_editing_p && instream == stdin && ISATTY (instream)) | |
899 | { | |
b4f5539f | 900 | rl = gdb_readline_wrapper (local_prompt); |
d318976c | 901 | } |
9e0b60a8 | 902 | else |
d318976c FN |
903 | { |
904 | rl = gdb_readline (local_prompt); | |
905 | } | |
9e0b60a8 | 906 | |
d318976c FN |
907 | if (annotation_level > 1 && instream == stdin) |
908 | { | |
306d9ac5 DC |
909 | puts_unfiltered ("\n\032\032post-"); |
910 | puts_unfiltered (annotation_suffix); | |
911 | puts_unfiltered ("\n"); | |
d318976c | 912 | } |
9e0b60a8 | 913 | |
d318976c | 914 | if (!rl || rl == (char *) EOF) |
9e0b60a8 | 915 | { |
d318976c FN |
916 | got_eof = 1; |
917 | break; | |
9e0b60a8 | 918 | } |
d318976c FN |
919 | if (strlen (rl) + 1 + (p - linebuffer) > linelength) |
920 | { | |
921 | linelength = strlen (rl) + 1 + (p - linebuffer); | |
922 | nline = (char *) xrealloc (linebuffer, linelength); | |
923 | p += nline - linebuffer; | |
924 | linebuffer = nline; | |
925 | } | |
926 | p1 = rl; | |
927 | /* Copy line. Don't copy null at end. (Leaves line alone | |
928 | if this was just a newline) */ | |
929 | while (*p1) | |
930 | *p++ = *p1++; | |
9e0b60a8 | 931 | |
b8c9b27d | 932 | xfree (rl); /* Allocated in readline. */ |
9e0b60a8 | 933 | |
d318976c FN |
934 | if (p == linebuffer || *(p - 1) != '\\') |
935 | break; | |
9e0b60a8 | 936 | |
d318976c FN |
937 | p--; /* Put on top of '\'. */ |
938 | local_prompt = (char *) 0; | |
939 | } | |
9e0b60a8 | 940 | |
d318976c FN |
941 | #ifdef STOP_SIGNAL |
942 | if (job_control) | |
943 | signal (STOP_SIGNAL, SIG_DFL); | |
944 | #endif | |
945 | immediate_quit--; | |
9e0b60a8 | 946 | |
d318976c FN |
947 | if (got_eof) |
948 | return NULL; | |
9e0b60a8 | 949 | |
d318976c FN |
950 | #define SERVER_COMMAND_LENGTH 7 |
951 | server_command = | |
952 | (p - linebuffer > SERVER_COMMAND_LENGTH) | |
bf896cb0 | 953 | && strncmp (linebuffer, "server ", SERVER_COMMAND_LENGTH) == 0; |
d318976c | 954 | if (server_command) |
9e0b60a8 | 955 | { |
d318976c FN |
956 | /* Note that we don't set `line'. Between this and the check in |
957 | dont_repeat, this insures that repeating will still do the | |
958 | right thing. */ | |
959 | *p = '\0'; | |
960 | return linebuffer + SERVER_COMMAND_LENGTH; | |
9e0b60a8 | 961 | } |
9e0b60a8 | 962 | |
d318976c FN |
963 | /* Do history expansion if that is wished. */ |
964 | if (history_expansion_p && instream == stdin | |
965 | && ISATTY (instream)) | |
966 | { | |
967 | char *history_value; | |
968 | int expanded; | |
9e0b60a8 | 969 | |
d318976c FN |
970 | *p = '\0'; /* Insert null now. */ |
971 | expanded = history_expand (linebuffer, &history_value); | |
972 | if (expanded) | |
973 | { | |
974 | /* Print the changes. */ | |
975 | printf_unfiltered ("%s\n", history_value); | |
9e0b60a8 | 976 | |
d318976c FN |
977 | /* If there was an error, call this function again. */ |
978 | if (expanded < 0) | |
979 | { | |
b8c9b27d | 980 | xfree (history_value); |
d318976c FN |
981 | return command_line_input (prompt_arg, repeat, annotation_suffix); |
982 | } | |
983 | if (strlen (history_value) > linelength) | |
984 | { | |
985 | linelength = strlen (history_value) + 1; | |
986 | linebuffer = (char *) xrealloc (linebuffer, linelength); | |
987 | } | |
988 | strcpy (linebuffer, history_value); | |
989 | p = linebuffer + strlen (linebuffer); | |
b8c9b27d | 990 | xfree (history_value); |
d318976c FN |
991 | } |
992 | } | |
9e0b60a8 | 993 | |
d318976c FN |
994 | /* If we just got an empty line, and that is supposed |
995 | to repeat the previous command, return the value in the | |
996 | global buffer. */ | |
997 | if (repeat && p == linebuffer) | |
998 | return line; | |
999 | for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++); | |
1000 | if (repeat && !*p1) | |
1001 | return line; | |
9e0b60a8 | 1002 | |
d318976c | 1003 | *p = 0; |
9e0b60a8 | 1004 | |
d318976c FN |
1005 | /* Add line to history if appropriate. */ |
1006 | if (instream == stdin | |
1007 | && ISATTY (stdin) && *linebuffer) | |
1008 | add_history (linebuffer); | |
9e0b60a8 | 1009 | |
d318976c FN |
1010 | /* Note: lines consisting solely of comments are added to the command |
1011 | history. This is useful when you type a command, and then | |
1012 | realize you don't want to execute it quite yet. You can comment | |
1013 | out the command and then later fetch it from the value history | |
1014 | and remove the '#'. The kill ring is probably better, but some | |
1015 | people are in the habit of commenting things out. */ | |
1016 | if (*p1 == '#') | |
1017 | *p1 = '\0'; /* Found a comment. */ | |
9e0b60a8 | 1018 | |
d318976c FN |
1019 | /* Save into global buffer if appropriate. */ |
1020 | if (repeat) | |
1021 | { | |
1022 | if (linelength > linesize) | |
1023 | { | |
1024 | line = xrealloc (line, linelength); | |
1025 | linesize = linelength; | |
1026 | } | |
1027 | strcpy (line, linebuffer); | |
1028 | return line; | |
1029 | } | |
9e0b60a8 | 1030 | |
d318976c | 1031 | return linebuffer; |
9e0b60a8 JM |
1032 | } |
1033 | \f | |
1034 | /* Print the GDB banner. */ | |
1035 | void | |
fba45db2 | 1036 | print_gdb_version (struct ui_file *stream) |
9e0b60a8 JM |
1037 | { |
1038 | /* From GNU coding standards, first line is meant to be easy for a | |
1039 | program to parse, and is just canonical program name and version | |
1040 | number, which starts after last space. */ | |
1041 | ||
1042 | fprintf_filtered (stream, "GNU gdb %s\n", version); | |
1043 | ||
1044 | /* Second line is a copyright notice. */ | |
1045 | ||
0bc2134e | 1046 | fprintf_filtered (stream, "Copyright 2004 Free Software Foundation, Inc.\n"); |
9e0b60a8 JM |
1047 | |
1048 | /* Following the copyright is a brief statement that the program is | |
1049 | free software, that users are free to copy and change it on | |
1050 | certain conditions, that it is covered by the GNU GPL, and that | |
1051 | there is no warranty. */ | |
1052 | ||
1053 | fprintf_filtered (stream, "\ | |
1054 | GDB is free software, covered by the GNU General Public License, and you are\n\ | |
1055 | welcome to change it and/or distribute copies of it under certain conditions.\n\ | |
1056 | Type \"show copying\" to see the conditions.\n\ | |
1057 | There is absolutely no warranty for GDB. Type \"show warranty\" for details.\n"); | |
1058 | ||
1059 | /* After the required info we print the configuration information. */ | |
1060 | ||
1061 | fprintf_filtered (stream, "This GDB was configured as \""); | |
6314a349 | 1062 | if (strcmp (host_name, target_name) != 0) |
9e0b60a8 JM |
1063 | { |
1064 | fprintf_filtered (stream, "--host=%s --target=%s", host_name, target_name); | |
1065 | } | |
1066 | else | |
1067 | { | |
1068 | fprintf_filtered (stream, "%s", host_name); | |
1069 | } | |
1070 | fprintf_filtered (stream, "\"."); | |
1071 | } | |
9e0b60a8 JM |
1072 | \f |
1073 | /* get_prompt: access method for the GDB prompt string. */ | |
1074 | ||
9e0b60a8 | 1075 | char * |
fba45db2 | 1076 | get_prompt (void) |
9e0b60a8 | 1077 | { |
362646f5 | 1078 | return PROMPT (0); |
9e0b60a8 JM |
1079 | } |
1080 | ||
1081 | void | |
fba45db2 | 1082 | set_prompt (char *s) |
9e0b60a8 JM |
1083 | { |
1084 | /* ??rehrauer: I don't know why this fails, since it looks as though | |
1085 | assignments to prompt are wrapped in calls to savestring... | |
c5aa993b | 1086 | if (prompt != NULL) |
b8c9b27d | 1087 | xfree (prompt); |
c5aa993b | 1088 | */ |
362646f5 | 1089 | PROMPT (0) = savestring (s, strlen (s)); |
9e0b60a8 | 1090 | } |
9e0b60a8 | 1091 | \f |
c5aa993b | 1092 | |
9e0b60a8 JM |
1093 | /* If necessary, make the user confirm that we should quit. Return |
1094 | non-zero if we should quit, zero if we shouldn't. */ | |
1095 | ||
1096 | int | |
fba45db2 | 1097 | quit_confirm (void) |
9e0b60a8 | 1098 | { |
39f77062 | 1099 | if (! ptid_equal (inferior_ptid, null_ptid) && target_has_execution) |
9e0b60a8 JM |
1100 | { |
1101 | char *s; | |
1102 | ||
1103 | /* This is something of a hack. But there's no reliable way to | |
c5aa993b JM |
1104 | see if a GUI is running. The `use_windows' variable doesn't |
1105 | cut it. */ | |
9a4105ab | 1106 | if (deprecated_init_ui_hook) |
9e0b60a8 JM |
1107 | s = "A debugging session is active.\nDo you still want to close the debugger?"; |
1108 | else if (attach_flag) | |
1109 | s = "The program is running. Quit anyway (and detach it)? "; | |
1110 | else | |
1111 | s = "The program is running. Exit anyway? "; | |
1112 | ||
306d9ac5 | 1113 | if (!query ("%s", s)) |
9e0b60a8 JM |
1114 | return 0; |
1115 | } | |
1116 | ||
1117 | return 1; | |
1118 | } | |
1119 | ||
b0abbc58 | 1120 | /* Helper routine for quit_force that requires error handling. */ |
9e0b60a8 | 1121 | |
b0abbc58 | 1122 | struct qt_args |
9e0b60a8 | 1123 | { |
b0abbc58 JJ |
1124 | char *args; |
1125 | int from_tty; | |
1126 | }; | |
9e0b60a8 | 1127 | |
b0abbc58 JJ |
1128 | static int |
1129 | quit_target (void *arg) | |
1130 | { | |
1131 | struct qt_args *qt = (struct qt_args *)arg; | |
9e0b60a8 | 1132 | |
39f77062 | 1133 | if (! ptid_equal (inferior_ptid, null_ptid) && target_has_execution) |
9e0b60a8 JM |
1134 | { |
1135 | if (attach_flag) | |
b0abbc58 | 1136 | target_detach (qt->args, qt->from_tty); |
9e0b60a8 | 1137 | else |
b0abbc58 | 1138 | target_kill (); |
9e0b60a8 JM |
1139 | } |
1140 | ||
1141 | /* UDI wants this, to kill the TIP. */ | |
f1c07ab0 | 1142 | target_close (¤t_target, 1); |
9e0b60a8 JM |
1143 | |
1144 | /* Save the history information if it is appropriate to do so. */ | |
1145 | if (write_history_p && history_filename) | |
1146 | write_history (history_filename); | |
1147 | ||
c5aa993b | 1148 | do_final_cleanups (ALL_CLEANUPS); /* Do any final cleanups before exiting */ |
9e0b60a8 | 1149 | |
b0abbc58 JJ |
1150 | return 0; |
1151 | } | |
1152 | ||
1153 | /* Quit without asking for confirmation. */ | |
1154 | ||
1155 | void | |
1156 | quit_force (char *args, int from_tty) | |
1157 | { | |
1158 | int exit_code = 0; | |
365c70b1 | 1159 | struct qt_args qt; |
b0abbc58 JJ |
1160 | |
1161 | /* An optional expression may be used to cause gdb to terminate with the | |
1162 | value of that expression. */ | |
1163 | if (args) | |
1164 | { | |
1165 | struct value *val = parse_and_eval (args); | |
1166 | ||
1167 | exit_code = (int) value_as_long (val); | |
1168 | } | |
1169 | ||
365c70b1 JJ |
1170 | qt.args = args; |
1171 | qt.from_tty = from_tty; | |
1172 | ||
b0abbc58 | 1173 | /* We want to handle any quit errors and exit regardless. */ |
365c70b1 | 1174 | catch_errors (quit_target, &qt, |
b0abbc58 JJ |
1175 | "Quitting: ", RETURN_MASK_ALL); |
1176 | ||
9e0b60a8 JM |
1177 | exit (exit_code); |
1178 | } | |
1179 | ||
9e0b60a8 JM |
1180 | /* Returns whether GDB is running on a terminal and whether the user |
1181 | desires that questions be asked of them on that terminal. */ | |
1182 | ||
1183 | int | |
fba45db2 | 1184 | input_from_terminal_p (void) |
9e0b60a8 JM |
1185 | { |
1186 | return gdb_has_a_terminal () && (instream == stdin) & caution; | |
1187 | } | |
1188 | \f | |
9e0b60a8 | 1189 | static void |
fba45db2 | 1190 | dont_repeat_command (char *ignored, int from_tty) |
9e0b60a8 | 1191 | { |
c5aa993b JM |
1192 | *line = 0; /* Can't call dont_repeat here because we're not |
1193 | necessarily reading from stdin. */ | |
9e0b60a8 JM |
1194 | } |
1195 | \f | |
1196 | /* Functions to manipulate command line editing control variables. */ | |
1197 | ||
1198 | /* Number of commands to print in each call to show_commands. */ | |
1199 | #define Hist_print 10 | |
d318976c | 1200 | void |
fba45db2 | 1201 | show_commands (char *args, int from_tty) |
9e0b60a8 JM |
1202 | { |
1203 | /* Index for history commands. Relative to history_base. */ | |
1204 | int offset; | |
1205 | ||
1206 | /* Number of the history entry which we are planning to display next. | |
1207 | Relative to history_base. */ | |
1208 | static int num = 0; | |
1209 | ||
1210 | /* The first command in the history which doesn't exist (i.e. one more | |
1211 | than the number of the last command). Relative to history_base. */ | |
1212 | int hist_len; | |
1213 | ||
9e0b60a8 JM |
1214 | /* Print out some of the commands from the command history. */ |
1215 | /* First determine the length of the history list. */ | |
1216 | hist_len = history_size; | |
1217 | for (offset = 0; offset < history_size; offset++) | |
1218 | { | |
1219 | if (!history_get (history_base + offset)) | |
1220 | { | |
1221 | hist_len = offset; | |
1222 | break; | |
1223 | } | |
1224 | } | |
1225 | ||
1226 | if (args) | |
1227 | { | |
1228 | if (args[0] == '+' && args[1] == '\0') | |
1229 | /* "info editing +" should print from the stored position. */ | |
1230 | ; | |
1231 | else | |
1232 | /* "info editing <exp>" should print around command number <exp>. */ | |
0e828ed1 | 1233 | num = (parse_and_eval_long (args) - history_base) - Hist_print / 2; |
9e0b60a8 JM |
1234 | } |
1235 | /* "show commands" means print the last Hist_print commands. */ | |
1236 | else | |
1237 | { | |
1238 | num = hist_len - Hist_print; | |
1239 | } | |
1240 | ||
1241 | if (num < 0) | |
1242 | num = 0; | |
1243 | ||
1244 | /* If there are at least Hist_print commands, we want to display the last | |
1245 | Hist_print rather than, say, the last 6. */ | |
1246 | if (hist_len - num < Hist_print) | |
1247 | { | |
1248 | num = hist_len - Hist_print; | |
1249 | if (num < 0) | |
1250 | num = 0; | |
1251 | } | |
1252 | ||
1253 | for (offset = num; offset < num + Hist_print && offset < hist_len; offset++) | |
1254 | { | |
1255 | printf_filtered ("%5d %s\n", history_base + offset, | |
c5aa993b | 1256 | (history_get (history_base + offset))->line); |
9e0b60a8 JM |
1257 | } |
1258 | ||
1259 | /* The next command we want to display is the next one that we haven't | |
1260 | displayed yet. */ | |
1261 | num += Hist_print; | |
1262 | ||
1263 | /* If the user repeats this command with return, it should do what | |
1264 | "show commands +" does. This is unnecessary if arg is null, | |
1265 | because "show commands +" is not useful after "show commands". */ | |
1266 | if (from_tty && args) | |
1267 | { | |
1268 | args[0] = '+'; | |
1269 | args[1] = '\0'; | |
1270 | } | |
1271 | } | |
1272 | ||
1273 | /* Called by do_setshow_command. */ | |
9e0b60a8 | 1274 | static void |
fba45db2 | 1275 | set_history_size_command (char *args, int from_tty, struct cmd_list_element *c) |
9e0b60a8 JM |
1276 | { |
1277 | if (history_size == INT_MAX) | |
1278 | unstifle_history (); | |
1279 | else if (history_size >= 0) | |
1280 | stifle_history (history_size); | |
1281 | else | |
1282 | { | |
1283 | history_size = INT_MAX; | |
1284 | error ("History size must be non-negative"); | |
1285 | } | |
1286 | } | |
1287 | ||
d318976c | 1288 | void |
fba45db2 | 1289 | set_history (char *args, int from_tty) |
9e0b60a8 JM |
1290 | { |
1291 | printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n"); | |
1292 | help_list (sethistlist, "set history ", -1, gdb_stdout); | |
1293 | } | |
1294 | ||
d318976c | 1295 | void |
fba45db2 | 1296 | show_history (char *args, int from_tty) |
9e0b60a8 JM |
1297 | { |
1298 | cmd_show_list (showhistlist, from_tty, ""); | |
1299 | } | |
1300 | ||
1301 | int info_verbose = 0; /* Default verbose msgs off */ | |
1302 | ||
1303 | /* Called by do_setshow_command. An elaborate joke. */ | |
d318976c | 1304 | void |
fba45db2 | 1305 | set_verbose (char *args, int from_tty, struct cmd_list_element *c) |
9e0b60a8 JM |
1306 | { |
1307 | char *cmdname = "verbose"; | |
1308 | struct cmd_list_element *showcmd; | |
1309 | ||
1310 | showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1); | |
1311 | ||
1312 | if (info_verbose) | |
1313 | { | |
1314 | c->doc = "Set verbose printing of informational messages."; | |
1315 | showcmd->doc = "Show verbose printing of informational messages."; | |
1316 | } | |
1317 | else | |
1318 | { | |
1319 | c->doc = "Set verbosity."; | |
1320 | showcmd->doc = "Show verbosity."; | |
1321 | } | |
1322 | } | |
1323 | ||
9e0b60a8 JM |
1324 | /* Init the history buffer. Note that we are called after the init file(s) |
1325 | * have been read so that the user can change the history file via his | |
1326 | * .gdbinit file (for instance). The GDBHISTFILE environment variable | |
1327 | * overrides all of this. | |
1328 | */ | |
1329 | ||
1330 | void | |
fba45db2 | 1331 | init_history (void) |
9e0b60a8 JM |
1332 | { |
1333 | char *tmpenv; | |
1334 | ||
1335 | tmpenv = getenv ("HISTSIZE"); | |
1336 | if (tmpenv) | |
1337 | history_size = atoi (tmpenv); | |
1338 | else if (!history_size) | |
1339 | history_size = 256; | |
1340 | ||
1341 | stifle_history (history_size); | |
1342 | ||
1343 | tmpenv = getenv ("GDBHISTFILE"); | |
1344 | if (tmpenv) | |
c5aa993b JM |
1345 | history_filename = savestring (tmpenv, strlen (tmpenv)); |
1346 | else if (!history_filename) | |
1347 | { | |
1348 | /* We include the current directory so that if the user changes | |
1349 | directories the file written will be the same as the one | |
1350 | that was read. */ | |
a0b3c4fd | 1351 | #ifdef __MSDOS__ |
eb2f494a AC |
1352 | /* No leading dots in file names are allowed on MSDOS. */ |
1353 | history_filename = concat (current_directory, "/_gdb_history", NULL); | |
a0b3c4fd | 1354 | #else |
c5aa993b | 1355 | history_filename = concat (current_directory, "/.gdb_history", NULL); |
a0b3c4fd | 1356 | #endif |
c5aa993b | 1357 | } |
9e0b60a8 JM |
1358 | read_history (history_filename); |
1359 | } | |
1360 | ||
1361 | static void | |
fba45db2 | 1362 | init_main (void) |
9e0b60a8 JM |
1363 | { |
1364 | struct cmd_list_element *c; | |
1365 | ||
362646f5 AC |
1366 | /* initialize the prompt stack to a simple "(gdb) " prompt or to |
1367 | whatever the DEFAULT_PROMPT is. */ | |
1368 | the_prompts.top = 0; | |
1369 | PREFIX (0) = ""; | |
1370 | PROMPT (0) = savestring (DEFAULT_PROMPT, strlen (DEFAULT_PROMPT)); | |
1371 | SUFFIX (0) = ""; | |
1372 | /* Set things up for annotation_level > 1, if the user ever decides | |
1373 | to use it. */ | |
1374 | async_annotation_suffix = "prompt"; | |
1375 | /* Set the variable associated with the setshow prompt command. */ | |
1376 | new_async_prompt = savestring (PROMPT (0), strlen (PROMPT (0))); | |
1377 | ||
1378 | /* If gdb was started with --annotate=2, this is equivalent to the | |
1379 | user entering the command 'set annotate 2' at the gdb prompt, so | |
1380 | we need to do extra processing. */ | |
1381 | if (annotation_level > 1) | |
1382 | set_async_annotation_level (NULL, 0, NULL); | |
9e0b60a8 JM |
1383 | |
1384 | /* Set the important stuff up for command editing. */ | |
1385 | command_editing_p = 1; | |
9e0b60a8 JM |
1386 | history_expansion_p = 0; |
1387 | write_history_p = 0; | |
1388 | ||
1389 | /* Setup important stuff for command line editing. */ | |
38017ce8 | 1390 | rl_completion_entry_function = readline_line_completion_function; |
51065942 | 1391 | rl_completer_word_break_characters = default_word_break_characters (); |
d318976c | 1392 | rl_completer_quote_characters = get_gdb_completer_quote_characters (); |
9e0b60a8 | 1393 | rl_readline_name = "gdb"; |
7cb3ec5e | 1394 | rl_terminal_name = getenv ("TERM"); |
9e0b60a8 | 1395 | |
467d8519 TT |
1396 | /* The name for this defun comes from Bash, where it originated. |
1397 | 15 is Control-o, the same binding this function has in Bash. */ | |
1398 | rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15); | |
1399 | ||
362646f5 AC |
1400 | c = add_set_cmd ("prompt", class_support, var_string, |
1401 | (char *) &new_async_prompt, "Set gdb's prompt", | |
1402 | &setlist); | |
1403 | deprecated_add_show_from_set (c, &showlist); | |
1404 | set_cmd_sfunc (c, set_async_prompt); | |
9e0b60a8 | 1405 | |
9e0b60a8 JM |
1406 | add_com ("dont-repeat", class_support, dont_repeat_command, "Don't repeat this command.\n\ |
1407 | Primarily used inside of user-defined commands that should not be repeated when\n\ | |
1408 | hitting return."); | |
1409 | ||
362646f5 AC |
1410 | c = add_set_cmd ("editing", class_support, var_boolean, (char *) &async_command_editing_p, |
1411 | "Set editing of command lines as they are typed.\n\ | |
9e0b60a8 JM |
1412 | Use \"on\" to enable the editing, and \"off\" to disable it.\n\ |
1413 | Without an argument, command line editing is enabled. To edit, use\n\ | |
1414 | EMACS-like or VI-like commands like control-P or ESC.", &setlist); | |
1415 | ||
362646f5 AC |
1416 | deprecated_add_show_from_set (c, &showlist); |
1417 | set_cmd_sfunc (c, set_async_editing_command); | |
9e0b60a8 | 1418 | |
cb1a6d5f | 1419 | deprecated_add_show_from_set |
c5aa993b JM |
1420 | (add_set_cmd ("save", no_class, var_boolean, (char *) &write_history_p, |
1421 | "Set saving of the history record on exit.\n\ | |
9e0b60a8 JM |
1422 | Use \"on\" to enable the saving, and \"off\" to disable it.\n\ |
1423 | Without an argument, saving is enabled.", &sethistlist), | |
1424 | &showhistlist); | |
1425 | ||
c5aa993b | 1426 | c = add_set_cmd ("size", no_class, var_integer, (char *) &history_size, |
d4654627 | 1427 | "Set the size of the command history,\n\ |
9e0b60a8 | 1428 | ie. the number of previous commands to keep a record of.", &sethistlist); |
cb1a6d5f | 1429 | deprecated_add_show_from_set (c, &showhistlist); |
9f60d481 | 1430 | set_cmd_sfunc (c, set_history_size_command); |
9e0b60a8 | 1431 | |
7a1bd56a EZ |
1432 | c = add_set_cmd ("filename", no_class, var_filename, |
1433 | (char *) &history_filename, | |
1434 | "Set the filename in which to record the command history\n\ | |
d4654627 | 1435 | (the list of previous commands of which a record is kept).", &sethistlist); |
5ba2abeb | 1436 | set_cmd_completer (c, filename_completer); |
cb1a6d5f | 1437 | deprecated_add_show_from_set (c, &showhistlist); |
9e0b60a8 | 1438 | |
cb1a6d5f | 1439 | deprecated_add_show_from_set |
9e0b60a8 | 1440 | (add_set_cmd ("confirm", class_support, var_boolean, |
c5aa993b | 1441 | (char *) &caution, |
9e0b60a8 JM |
1442 | "Set whether to confirm potentially dangerous operations.", |
1443 | &setlist), | |
1444 | &showlist); | |
1445 | ||
362646f5 AC |
1446 | c = add_set_cmd ("annotate", class_obscure, var_zinteger, |
1447 | (char *) &annotation_level, "Set annotation_level.\n\ | |
9e0b60a8 JM |
1448 | 0 == normal; 1 == fullname (for use when running under emacs)\n\ |
1449 | 2 == output annotated suitably for use by programs that control GDB.", | |
362646f5 AC |
1450 | &setlist); |
1451 | deprecated_add_show_from_set (c, &showlist); | |
1452 | set_cmd_sfunc (c, set_async_annotation_level); | |
1453 | ||
1454 | deprecated_add_show_from_set | |
1455 | (add_set_cmd ("exec-done-display", class_support, var_boolean, (char *) &exec_done_display_p, | |
1456 | "Set notification of completion for asynchronous execution commands.\n\ | |
104c1213 | 1457 | Use \"on\" to enable the notification, and \"off\" to disable it.", &setlist), |
362646f5 | 1458 | &showlist); |
9e0b60a8 | 1459 | } |
64cdedad EZ |
1460 | |
1461 | void | |
1462 | gdb_init (char *argv0) | |
1463 | { | |
1464 | if (pre_init_ui_hook) | |
1465 | pre_init_ui_hook (); | |
1466 | ||
1467 | /* Run the init function of each source file */ | |
1468 | ||
1469 | getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)); | |
1470 | current_directory = gdb_dirbuf; | |
1471 | ||
1472 | #ifdef __MSDOS__ | |
1473 | /* Make sure we return to the original directory upon exit, come | |
1474 | what may, since the OS doesn't do that for us. */ | |
1475 | make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory)); | |
1476 | #endif | |
1477 | ||
1478 | init_cmd_lists (); /* This needs to be done first */ | |
1479 | initialize_targets (); /* Setup target_terminal macros for utils.c */ | |
1480 | initialize_utils (); /* Make errors and warnings possible */ | |
1481 | initialize_all_files (); | |
1482 | initialize_current_architecture (); | |
1483 | init_cli_cmds(); | |
1484 | init_main (); /* But that omits this file! Do it now */ | |
1485 | ||
362646f5 | 1486 | async_init_signals (); |
64cdedad EZ |
1487 | |
1488 | /* We need a default language for parsing expressions, so simple things like | |
1489 | "set width 0" won't fail if no language is explicitly set in a config file | |
1490 | or implicitly set by reading an executable during startup. */ | |
1491 | set_language (language_c); | |
1492 | expected_language = current_language; /* don't warn about the change. */ | |
1493 | ||
9a4105ab AC |
1494 | /* Allow another UI to initialize. If the UI fails to initialize, |
1495 | and it wants GDB to revert to the CLI, it should clear | |
1496 | deprecated_init_ui_hook. */ | |
1497 | if (deprecated_init_ui_hook) | |
1498 | deprecated_init_ui_hook (argv0); | |
64cdedad | 1499 | } |