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