1 /* Top level stuff for GDB, the GNU debugger.
2
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software
5 Foundation, Inc.
6
7 This file is part of GDB.
8
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.
13
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.
18
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. */
23
24 #include "defs.h"
25 #include "top.h"
26 #include "target.h"
27 #include "inferior.h"
28 #include "symfile.h"
29 #include "gdbcore.h"
30
31 #include "getopt.h"
32
33 #include <sys/types.h>
34 #include "gdb_stat.h"
35 #include <ctype.h>
36
37 #include "gdb_string.h"
38 #include "event-loop.h"
39 #include "ui-out.h"
40
41 #include "interps.h"
42 #include "main.h"
43
44 /* If nonzero, display time usage both at startup and for each command. */
45
46 int display_time;
47
48 /* If nonzero, display space usage both at startup and for each command. */
49
50 int display_space;
51
52 /* Whether this is the async version or not. The async version is
53 invoked on the command line with the -nw --async options. In this
54 version, the usual command_loop is substituted by and event loop which
55 processes UI events asynchronously. */
56 int event_loop_p = 1;
57
58 /* The selected interpreter. This will be used as a set command
59 variable, so it should always be malloc'ed - since
60 do_setshow_command will free it. */
61 char *interpreter_p;
62
63 /* Whether xdb commands will be handled */
64 int xdb_commands = 0;
65
66 /* Whether dbx commands will be handled */
67 int dbx_commands = 0;
68
69 /* System root path, used to find libraries etc. */
70 char *gdb_sysroot = 0;
71
72 struct ui_file *gdb_stdout;
73 struct ui_file *gdb_stderr;
74 struct ui_file *gdb_stdlog;
75 struct ui_file *gdb_stdin;
76 /* target IO streams */
77 struct ui_file *gdb_stdtargin;
78 struct ui_file *gdb_stdtarg;
79 struct ui_file *gdb_stdtargerr;
80
81 /* Whether to enable writing into executable and core files */
82 extern int write_files;
83
84 static void print_gdb_help (struct ui_file *);
85
86 /* These two are used to set the external editor commands when gdb is farming
87 out files to be edited by another program. */
88
89 extern char *external_editor_command;
90
91 /* Call command_loop. If it happens to return, pass that through as a
92 non-zero return status. */
93
94 static int
captured_command_loop(void * data)95 captured_command_loop (void *data)
96 {
97 current_interp_command_loop ();
98 /* FIXME: cagney/1999-11-05: A correct command_loop() implementaton
99 would clean things up (restoring the cleanup chain) to the state
100 they were just prior to the call. Technically, this means that
101 the do_cleanups() below is redundant. Unfortunately, many FUNCs
102 are not that well behaved. do_cleanups should either be replaced
103 with a do_cleanups call (to cover the problem) or an assertion
104 check to detect bad FUNCs code. */
105 do_cleanups (ALL_CLEANUPS);
106 /* If the command_loop returned, normally (rather than threw an
107 error) we try to quit. If the quit is aborted, catch_errors()
108 which called this catch the signal and restart the command
109 loop. */
110 quit_command (NULL, instream == stdin);
111 return 1;
112 }
113
114 static int
captured_main(void * data)115 captured_main (void *data)
116 {
117 struct captured_main_args *context = data;
118 int argc = context->argc;
119 char **argv = context->argv;
120 int count;
121 static int quiet = 0;
122 static int batch = 0;
123 static int set_args = 0;
124
125 /* Pointers to various arguments from command line. */
126 char *symarg = NULL;
127 char *execarg = NULL;
128 char *corearg = NULL;
129 char *cdarg = NULL;
130 char *ttyarg = NULL;
131
132 /* These are static so that we can take their address in an initializer. */
133 static int print_help;
134 static int print_version;
135
136 /* Pointers to all arguments of --command option. */
137 char **cmdarg;
138 /* Allocated size of cmdarg. */
139 int cmdsize;
140 /* Number of elements of cmdarg used. */
141 int ncmd;
142
143 /* Indices of all arguments of --directory option. */
144 char **dirarg;
145 /* Allocated size. */
146 int dirsize;
147 /* Number of elements used. */
148 int ndir;
149
150 struct stat homebuf, cwdbuf;
151 char *homedir, *homeinit;
152
153 int i;
154
155 long time_at_startup = get_run_time ();
156
157 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
158 setlocale (LC_MESSAGES, "");
159 #endif
160 #if defined (HAVE_SETLOCALE)
161 setlocale (LC_CTYPE, "");
162 #endif
163 bindtextdomain (PACKAGE, LOCALEDIR);
164 textdomain (PACKAGE);
165
166 /* This needs to happen before the first use of malloc. */
167 init_malloc (NULL);
168
169 #ifdef HAVE_SBRK
170 lim_at_start = (char *) sbrk (0);
171 #endif
172
173 #if defined (ALIGN_STACK_ON_STARTUP)
174 i = (int) &count & 0x3;
175 if (i != 0)
176 alloca (4 - i);
177 #endif
178
179 cmdsize = 1;
180 cmdarg = (char **) xmalloc (cmdsize * sizeof (*cmdarg));
181 ncmd = 0;
182 dirsize = 1;
183 dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg));
184 ndir = 0;
185
186 quit_flag = 0;
187 line = (char *) xmalloc (linesize);
188 line[0] = '\0'; /* Terminate saved (now empty) cmd line */
189 instream = stdin;
190
191 getcwd (gdb_dirbuf, sizeof (gdb_dirbuf));
192 current_directory = gdb_dirbuf;
193
194 gdb_stdout = stdio_fileopen (stdout);
195 gdb_stderr = stdio_fileopen (stderr);
196 gdb_stdlog = gdb_stderr; /* for moment */
197 gdb_stdtarg = gdb_stderr; /* for moment */
198 gdb_stdin = stdio_fileopen (stdin);
199 gdb_stdtargerr = gdb_stderr; /* for moment */
200 gdb_stdtargin = gdb_stdin; /* for moment */
201
202 /* initialize error() */
203 error_init ();
204
205 /* Set the sysroot path. */
206 #ifdef TARGET_SYSTEM_ROOT_RELOCATABLE
207 gdb_sysroot = make_relative_prefix (argv[0], BINDIR, TARGET_SYSTEM_ROOT);
208 if (gdb_sysroot)
209 {
210 struct stat s;
211 int res = 0;
212
213 if (stat (gdb_sysroot, &s) == 0)
214 if (S_ISDIR (s.st_mode))
215 res = 1;
216
217 if (res == 0)
218 {
219 xfree (gdb_sysroot);
220 gdb_sysroot = TARGET_SYSTEM_ROOT;
221 }
222 }
223 else
224 gdb_sysroot = TARGET_SYSTEM_ROOT;
225 #else
226 #if defined (TARGET_SYSTEM_ROOT)
227 gdb_sysroot = TARGET_SYSTEM_ROOT;
228 #else
229 gdb_sysroot = "";
230 #endif
231 #endif
232
233 /* There will always be an interpreter. Either the one passed into
234 this captured main, or one specified by the user at start up, or
235 the console. Initialize the interpreter to the one requested by
236 the application. */
237 interpreter_p = xstrdup (context->interpreter_p);
238
239 /* Parse arguments and options. */
240 {
241 int c;
242 /* When var field is 0, use flag field to record the equivalent
243 short option (or arbitrary numbers starting at 10 for those
244 with no equivalent). */
245 enum {
246 OPT_SE = 10,
247 OPT_CD,
248 OPT_ANNOTATE,
249 OPT_STATISTICS,
250 OPT_TUI,
251 OPT_NOWINDOWS,
252 OPT_WINDOWS
253 };
254 static struct option long_options[] =
255 {
256 {"async", no_argument, &event_loop_p, 1},
257 {"noasync", no_argument, &event_loop_p, 0},
258 #if defined(TUI)
259 {"tui", no_argument, 0, OPT_TUI},
260 #endif
261 {"xdb", no_argument, &xdb_commands, 1},
262 {"dbx", no_argument, &dbx_commands, 1},
263 {"readnow", no_argument, &readnow_symbol_files, 1},
264 {"r", no_argument, &readnow_symbol_files, 1},
265 {"quiet", no_argument, &quiet, 1},
266 {"q", no_argument, &quiet, 1},
267 {"silent", no_argument, &quiet, 1},
268 {"nx", no_argument, &inhibit_gdbinit, 1},
269 {"n", no_argument, &inhibit_gdbinit, 1},
270 {"batch", no_argument, &batch, 1},
271 {"epoch", no_argument, &epoch_interface, 1},
272
273 /* This is a synonym for "--annotate=1". --annotate is now preferred,
274 but keep this here for a long time because people will be running
275 emacses which use --fullname. */
276 {"fullname", no_argument, 0, 'f'},
277 {"f", no_argument, 0, 'f'},
278
279 {"annotate", required_argument, 0, OPT_ANNOTATE},
280 {"help", no_argument, &print_help, 1},
281 {"se", required_argument, 0, OPT_SE},
282 {"symbols", required_argument, 0, 's'},
283 {"s", required_argument, 0, 's'},
284 {"exec", required_argument, 0, 'e'},
285 {"e", required_argument, 0, 'e'},
286 {"core", required_argument, 0, 'c'},
287 {"c", required_argument, 0, 'c'},
288 {"pid", required_argument, 0, 'p'},
289 {"p", required_argument, 0, 'p'},
290 {"command", required_argument, 0, 'x'},
291 {"version", no_argument, &print_version, 1},
292 {"x", required_argument, 0, 'x'},
293 #ifdef GDBTK
294 {"tclcommand", required_argument, 0, 'z'},
295 {"enable-external-editor", no_argument, 0, 'y'},
296 {"editor-command", required_argument, 0, 'w'},
297 #endif
298 {"ui", required_argument, 0, 'i'},
299 {"interpreter", required_argument, 0, 'i'},
300 {"i", required_argument, 0, 'i'},
301 {"directory", required_argument, 0, 'd'},
302 {"d", required_argument, 0, 'd'},
303 {"cd", required_argument, 0, OPT_CD},
304 {"tty", required_argument, 0, 't'},
305 {"baud", required_argument, 0, 'b'},
306 {"b", required_argument, 0, 'b'},
307 {"nw", no_argument, NULL, OPT_NOWINDOWS},
308 {"nowindows", no_argument, NULL, OPT_NOWINDOWS},
309 {"w", no_argument, NULL, OPT_WINDOWS},
310 {"windows", no_argument, NULL, OPT_WINDOWS},
311 {"statistics", no_argument, 0, OPT_STATISTICS},
312 {"write", no_argument, &write_files, 1},
313 {"args", no_argument, &set_args, 1},
314 {0, no_argument, 0, 0}
315 };
316
317 while (1)
318 {
319 int option_index;
320
321 c = getopt_long_only (argc, argv, "",
322 long_options, &option_index);
323 if (c == EOF || set_args)
324 break;
325
326 /* Long option that takes an argument. */
327 if (c == 0 && long_options[option_index].flag == 0)
328 c = long_options[option_index].val;
329
330 switch (c)
331 {
332 case 0:
333 /* Long option that just sets a flag. */
334 break;
335 case OPT_SE:
336 symarg = optarg;
337 execarg = optarg;
338 break;
339 case OPT_CD:
340 cdarg = optarg;
341 break;
342 case OPT_ANNOTATE:
343 /* FIXME: what if the syntax is wrong (e.g. not digits)? */
344 annotation_level = atoi (optarg);
345 break;
346 case OPT_STATISTICS:
347 /* Enable the display of both time and space usage. */
348 display_time = 1;
349 display_space = 1;
350 break;
351 case OPT_TUI:
352 /* --tui is equivalent to -i=tui. */
353 xfree (interpreter_p);
354 interpreter_p = xstrdup ("tui");
355 break;
356 case OPT_WINDOWS:
357 /* FIXME: cagney/2003-03-01: Not sure if this option is
358 actually useful, and if it is, what it should do. */
359 use_windows = 1;
360 break;
361 case OPT_NOWINDOWS:
362 /* -nw is equivalent to -i=console. */
363 xfree (interpreter_p);
364 interpreter_p = xstrdup (INTERP_CONSOLE);
365 use_windows = 0;
366 break;
367 case 'f':
368 annotation_level = 1;
369 /* We have probably been invoked from emacs. Disable window interface. */
370 use_windows = 0;
371 break;
372 case 's':
373 symarg = optarg;
374 break;
375 case 'e':
376 execarg = optarg;
377 break;
378 case 'c':
379 corearg = optarg;
380 break;
381 case 'p':
382 /* "corearg" is shared by "--core" and "--pid" */
383 corearg = optarg;
384 break;
385 case 'x':
386 cmdarg[ncmd++] = optarg;
387 if (ncmd >= cmdsize)
388 {
389 cmdsize *= 2;
390 cmdarg = (char **) xrealloc ((char *) cmdarg,
391 cmdsize * sizeof (*cmdarg));
392 }
393 break;
394 #ifdef GDBTK
395 case 'z':
396 {
397 extern int gdbtk_test (char *);
398 if (!gdbtk_test (optarg))
399 {
400 fprintf_unfiltered (gdb_stderr, _("%s: unable to load tclcommand file \"%s\""),
401 argv[0], optarg);
402 exit (1);
403 }
404 break;
405 }
406 case 'y':
407 /* Backwards compatibility only. */
408 break;
409 case 'w':
410 {
411 external_editor_command = xstrdup (optarg);
412 break;
413 }
414 #endif /* GDBTK */
415 case 'i':
416 xfree (interpreter_p);
417 interpreter_p = xstrdup (optarg);
418 break;
419 case 'd':
420 dirarg[ndir++] = optarg;
421 if (ndir >= dirsize)
422 {
423 dirsize *= 2;
424 dirarg = (char **) xrealloc ((char *) dirarg,
425 dirsize * sizeof (*dirarg));
426 }
427 break;
428 case 't':
429 ttyarg = optarg;
430 break;
431 case 'q':
432 quiet = 1;
433 break;
434 case 'b':
435 {
436 int i;
437 char *p;
438
439 i = strtol (optarg, &p, 0);
440 if (i == 0 && p == optarg)
441
442 /* Don't use *_filtered or warning() (which relies on
443 current_target) until after initialize_all_files(). */
444
445 fprintf_unfiltered
446 (gdb_stderr,
447 _("warning: could not set baud rate to `%s'.\n"), optarg);
448 else
449 baud_rate = i;
450 }
451 break;
452 case 'l':
453 {
454 int i;
455 char *p;
456
457 i = strtol (optarg, &p, 0);
458 if (i == 0 && p == optarg)
459
460 /* Don't use *_filtered or warning() (which relies on
461 current_target) until after initialize_all_files(). */
462
463 fprintf_unfiltered
464 (gdb_stderr,
465 _("warning: could not set timeout limit to `%s'.\n"), optarg);
466 else
467 remote_timeout = i;
468 }
469 break;
470
471 case '?':
472 fprintf_unfiltered (gdb_stderr,
473 _("Use `%s --help' for a complete list of options.\n"),
474 argv[0]);
475 exit (1);
476 }
477 }
478
479 /* If --help or --version, disable window interface. */
480 if (print_help || print_version)
481 {
482 use_windows = 0;
483 }
484
485 if (set_args)
486 {
487 /* The remaining options are the command-line options for the
488 inferior. The first one is the sym/exec file, and the rest
489 are arguments. */
490 if (optind >= argc)
491 {
492 fprintf_unfiltered (gdb_stderr,
493 _("%s: `--args' specified but no program specified\n"),
494 argv[0]);
495 exit (1);
496 }
497 symarg = argv[optind];
498 execarg = argv[optind];
499 ++optind;
500 set_inferior_args_vector (argc - optind, &argv[optind]);
501 }
502 else
503 {
504 /* OK, that's all the options. The other arguments are filenames. */
505 count = 0;
506 for (; optind < argc; optind++)
507 switch (++count)
508 {
509 case 1:
510 symarg = argv[optind];
511 execarg = argv[optind];
512 break;
513 case 2:
514 /* The documentation says this can be a "ProcID" as well.
515 We will try it as both a corefile and a pid. */
516 corearg = argv[optind];
517 break;
518 case 3:
519 fprintf_unfiltered (gdb_stderr,
520 _("Excess command line arguments ignored. (%s%s)\n"),
521 argv[optind], (optind == argc - 1) ? "" : " ...");
522 break;
523 }
524 }
525 if (batch)
526 quiet = 1;
527 }
528
529 /* Initialize all files. Give the interpreter a chance to take
530 control of the console via the init_ui_hook()) */
531 gdb_init (argv[0]);
532
533 /* Do these (and anything which might call wrap_here or *_filtered)
534 after initialize_all_files() but before the interpreter has been
535 installed. Otherwize the help/version messages will be eaten by
536 the interpreter's output handler. */
537
538 if (print_version)
539 {
540 print_gdb_version (gdb_stdout);
541 wrap_here ("");
542 printf_filtered ("\n");
543 exit (0);
544 }
545
546 if (print_help)
547 {
548 print_gdb_help (gdb_stdout);
549 fputs_unfiltered ("\n", gdb_stdout);
550 exit (0);
551 }
552
553 /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
554 GDB retain the old MI1 interpreter startup behavior. Output the
555 copyright message before the interpreter is installed. That way
556 it isn't encapsulated in MI output. */
557 if (!quiet && strcmp (interpreter_p, INTERP_MI1) == 0)
558 {
559 /* Print all the junk at the top, with trailing "..." if we are about
560 to read a symbol file (possibly slowly). */
561 print_gdb_version (gdb_stdout);
562 if (symarg)
563 printf_filtered ("..");
564 wrap_here ("");
565 gdb_flush (gdb_stdout); /* Force to screen during slow operations */
566 }
567
568
569 /* Install the default UI. All the interpreters should have had a
570 look at things by now. Initialize the default interpreter. */
571
572 {
573 /* Find it. */
574 struct interp *interp = interp_lookup (interpreter_p);
575 if (interp == NULL)
576 error ("Interpreter `%s' unrecognized", interpreter_p);
577 /* Install it. */
578 if (!interp_set (interp))
579 {
580 fprintf_unfiltered (gdb_stderr,
581 "Interpreter `%s' failed to initialize.\n",
582 interpreter_p);
583 exit (1);
584 }
585 }
586
587 /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets
588 GDB retain the old MI1 interpreter startup behavior. Output the
589 copyright message after the interpreter is installed when it is
590 any sane interpreter. */
591 if (!quiet && !current_interp_named_p (INTERP_MI1))
592 {
593 /* Print all the junk at the top, with trailing "..." if we are about
594 to read a symbol file (possibly slowly). */
595 print_gdb_version (gdb_stdout);
596 if (symarg)
597 printf_filtered ("..");
598 wrap_here ("");
599 gdb_flush (gdb_stdout); /* Force to screen during slow operations */
600 }
601
602 error_pre_print = "\n\n";
603 quit_pre_print = error_pre_print;
604
605 /* We may get more than one warning, don't double space all of them... */
606 warning_pre_print = _("\nwarning: ");
607
608 /* Read and execute $HOME/.gdbinit file, if it exists. This is done
609 *before* all the command line arguments are processed; it sets
610 global parameters, which are independent of what file you are
611 debugging or what directory you are in. */
612 homedir = getenv ("HOME");
613 if (homedir)
614 {
615 homeinit = (char *) alloca (strlen (homedir) +
616 strlen (gdbinit) + 10);
617 strcpy (homeinit, homedir);
618 strcat (homeinit, "/");
619 strcat (homeinit, gdbinit);
620
621 if (!inhibit_gdbinit)
622 {
623 catch_command_errors (source_command, homeinit, 0, RETURN_MASK_ALL);
624 }
625
626 /* Do stats; no need to do them elsewhere since we'll only
627 need them if homedir is set. Make sure that they are
628 zero in case one of them fails (this guarantees that they
629 won't match if either exists). */
630
631 memset (&homebuf, 0, sizeof (struct stat));
632 memset (&cwdbuf, 0, sizeof (struct stat));
633
634 stat (homeinit, &homebuf);
635 stat (gdbinit, &cwdbuf); /* We'll only need this if
636 homedir was set. */
637 }
638
639 /* Now perform all the actions indicated by the arguments. */
640 if (cdarg != NULL)
641 {
642 catch_command_errors (cd_command, cdarg, 0, RETURN_MASK_ALL);
643 }
644
645 for (i = 0; i < ndir; i++)
646 catch_command_errors (directory_command, dirarg[i], 0, RETURN_MASK_ALL);
647 xfree (dirarg);
648
649 if (execarg != NULL
650 && symarg != NULL
651 && strcmp (execarg, symarg) == 0)
652 {
653 /* The exec file and the symbol-file are the same. If we can't
654 open it, better only print one error message.
655 catch_command_errors returns non-zero on success! */
656 if (catch_command_errors (exec_file_attach, execarg, !batch, RETURN_MASK_ALL))
657 catch_command_errors (symbol_file_add_main, symarg, 0, RETURN_MASK_ALL);
658 }
659 else
660 {
661 if (execarg != NULL)
662 catch_command_errors (exec_file_attach, execarg, !batch, RETURN_MASK_ALL);
663 if (symarg != NULL)
664 catch_command_errors (symbol_file_add_main, symarg, 0, RETURN_MASK_ALL);
665 }
666
667 /* After the symbol file has been read, print a newline to get us
668 beyond the copyright line... But errors should still set off
669 the error message with a (single) blank line. */
670 if (!quiet)
671 printf_filtered ("\n");
672 error_pre_print = "\n";
673 quit_pre_print = error_pre_print;
674 warning_pre_print = _("\nwarning: ");
675
676 if (corearg != NULL)
677 {
678 /* corearg may be either a corefile or a pid.
679 If its first character is a digit, try attach first
680 and then corefile. Otherwise try corefile first. */
681
682 if (isdigit (corearg[0]))
683 {
684 if (catch_command_errors (attach_command, corearg,
685 !batch, RETURN_MASK_ALL) == 0)
686 catch_command_errors (core_file_command, corearg,
687 !batch, RETURN_MASK_ALL);
688 }
689 else /* Can't be a pid, better be a corefile. */
690 catch_command_errors (core_file_command, corearg,
691 !batch, RETURN_MASK_ALL);
692 }
693
694 if (ttyarg != NULL)
695 catch_command_errors (tty_command, ttyarg, !batch, RETURN_MASK_ALL);
696
697 /* Error messages should no longer be distinguished with extra output. */
698 error_pre_print = NULL;
699 quit_pre_print = NULL;
700 warning_pre_print = _("warning: ");
701
702 /* Read the .gdbinit file in the current directory, *if* it isn't
703 the same as the $HOME/.gdbinit file (it should exist, also). */
704
705 if (!homedir
706 || memcmp ((char *) &homebuf, (char *) &cwdbuf, sizeof (struct stat)))
707 if (!inhibit_gdbinit)
708 {
709 catch_command_errors (source_command, gdbinit, 0, RETURN_MASK_ALL);
710 }
711
712 for (i = 0; i < ncmd; i++)
713 {
714 #if 0
715 /* NOTE: cagney/1999-11-03: SET_TOP_LEVEL() was a macro that
716 expanded into a call to setjmp(). */
717 if (!SET_TOP_LEVEL ()) /* NB: This is #if 0'd out */
718 {
719 /* NOTE: I am commenting this out, because it is not clear
720 where this feature is used. It is very old and
721 undocumented. ezannoni: 1999-05-04 */
722 #if 0
723 if (cmdarg[i][0] == '-' && cmdarg[i][1] == '\0')
724 read_command_file (stdin);
725 else
726 #endif
727 source_command (cmdarg[i], !batch);
728 do_cleanups (ALL_CLEANUPS);
729 }
730 #endif
731 catch_command_errors (source_command, cmdarg[i], !batch, RETURN_MASK_ALL);
732 }
733 xfree (cmdarg);
734
735 /* Read in the old history after all the command files have been read. */
736 init_history ();
737
738 if (batch)
739 {
740 /* We have hit the end of the batch file. */
741 exit (0);
742 }
743
744 /* Do any host- or target-specific hacks. This is used for i960 targets
745 to force the user to set a nindy target and spec its parameters. */
746
747 #ifdef BEFORE_MAIN_LOOP_HOOK
748 BEFORE_MAIN_LOOP_HOOK;
749 #endif
750
751 /* Show time and/or space usage. */
752
753 if (display_time)
754 {
755 long init_time = get_run_time () - time_at_startup;
756
757 printf_unfiltered (_("Startup time: %ld.%06ld\n"),
758 init_time / 1000000, init_time % 1000000);
759 }
760
761 if (display_space)
762 {
763 #ifdef HAVE_SBRK
764 extern char **environ;
765 char *lim = (char *) sbrk (0);
766
767 printf_unfiltered (_("Startup size: data size %ld\n"),
768 (long) (lim - (char *) &environ));
769 #endif
770 }
771
772 #if 0
773 /* FIXME: cagney/1999-11-06: The original main loop was like: */
774 while (1)
775 {
776 if (!SET_TOP_LEVEL ())
777 {
778 do_cleanups (ALL_CLEANUPS); /* Do complete cleanup */
779 /* GUIs generally have their own command loop, mainloop, or whatever.
780 This is a good place to gain control because many error
781 conditions will end up here via longjmp(). */
782 if (command_loop_hook)
783 command_loop_hook ();
784 else
785 command_loop ();
786 quit_command ((char *) 0, instream == stdin);
787 }
788 }
789 /* NOTE: If the command_loop() returned normally, the loop would
790 attempt to exit by calling the function quit_command(). That
791 function would either call exit() or throw an error returning
792 control to SET_TOP_LEVEL. */
793 /* NOTE: The function do_cleanups() was called once each time round
794 the loop. The usefulness of the call isn't clear. If an error
795 was thrown, everything would have already been cleaned up. If
796 command_loop() returned normally and quit_command() was called,
797 either exit() or error() (again cleaning up) would be called. */
798 #endif
799 /* NOTE: cagney/1999-11-07: There is probably no reason for not
800 moving this loop and the code found in captured_command_loop()
801 into the command_loop() proper. The main thing holding back that
802 change - SET_TOP_LEVEL() - has been eliminated. */
803 while (1)
804 {
805 catch_errors (captured_command_loop, 0, "", RETURN_MASK_ALL);
806 }
807 /* No exit -- exit is through quit_command. */
808 }
809
810 int
gdb_main(struct captured_main_args * args)811 gdb_main (struct captured_main_args *args)
812 {
813 use_windows = args->use_windows;
814 catch_errors (captured_main, args, "", RETURN_MASK_ALL);
815 /* The only way to end up here is by an error (normal exit is
816 handled by quit_force()), hence always return an error status. */
817 return 1;
818 }
819
820
821 /* Don't use *_filtered for printing help. We don't want to prompt
822 for continue no matter how small the screen or how much we're going
823 to print. */
824
825 static void
print_gdb_help(struct ui_file * stream)826 print_gdb_help (struct ui_file *stream)
827 {
828 fputs_unfiltered (_("\
829 This is the GNU debugger. Usage:\n\n\
830 gdb [options] [executable-file [core-file or process-id]]\n\
831 gdb [options] --args executable-file [inferior-arguments ...]\n\n\
832 Options:\n\n\
833 "), stream);
834 fputs_unfiltered (_("\
835 --args Arguments after executable-file are passed to inferior\n\
836 "), stream);
837 fputs_unfiltered (_("\
838 --[no]async Enable (disable) asynchronous version of CLI\n\
839 "), stream);
840 fputs_unfiltered (_("\
841 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
842 --batch Exit after processing options.\n\
843 --cd=DIR Change current directory to DIR.\n\
844 --command=FILE Execute GDB commands from FILE.\n\
845 --core=COREFILE Analyze the core dump COREFILE.\n\
846 --pid=PID Attach to running process PID.\n\
847 "), stream);
848 fputs_unfiltered (_("\
849 --dbx DBX compatibility mode.\n\
850 --directory=DIR Search for source files in DIR.\n\
851 --epoch Output information used by epoch emacs-GDB interface.\n\
852 --exec=EXECFILE Use EXECFILE as the executable.\n\
853 --fullname Output information used by emacs-GDB interface.\n\
854 --help Print this message.\n\
855 "), stream);
856 fputs_unfiltered (_("\
857 --interpreter=INTERP\n\
858 Select a specific interpreter / user interface\n\
859 "), stream);
860 fputs_unfiltered (_("\
861 --mapped Use mapped symbol files if supported on this system.\n\
862 --nw Do not use a window interface.\n\
863 --nx Do not read "), stream);
864 fputs_unfiltered (gdbinit, stream);
865 fputs_unfiltered (_(" file.\n\
866 --quiet Do not print version number on startup.\n\
867 --readnow Fully read symbol files on first access.\n\
868 "), stream);
869 fputs_unfiltered (_("\
870 --se=FILE Use FILE as symbol file and executable file.\n\
871 --symbols=SYMFILE Read symbols from SYMFILE.\n\
872 --tty=TTY Use TTY for input/output by the program being debugged.\n\
873 "), stream);
874 #if defined(TUI)
875 fputs_unfiltered (_("\
876 --tui Use a terminal user interface.\n\
877 "), stream);
878 #endif
879 fputs_unfiltered (_("\
880 --version Print version information and then exit.\n\
881 -w Use a window interface.\n\
882 --write Set writing into executable and core files.\n\
883 --xdb XDB compatibility mode.\n\
884 "), stream);
885 fputs_unfiltered (_("\n\
886 For more information, type \"help\" from within GDB, or consult the\n\
887 GDB manual (available as on-line info or a printed manual).\n\
888 Report bugs to \"[email protected]\".\
889 "), stream);
890 }
891