1 /* Top level stuff for GDB, the GNU debugger.
3 Copyright (C) 1986-2014 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 #include "exceptions.h"
30 #include <sys/types.h>
35 #include "event-loop.h"
41 #include "cli/cli-cmds.h"
43 #include "auto-load.h"
46 #include "filenames.h"
47 #include "filestuff.h"
50 /* The selected interpreter. This will be used as a set command
51 variable, so it should always be malloc'ed - since
52 do_setshow_command will free it. */
55 /* Whether xdb commands will be handled. */
58 /* Whether dbx commands will be handled. */
61 /* System root path, used to find libraries etc. */
62 char *gdb_sysroot = 0;
64 /* GDB datadir, used to store data files. */
65 char *gdb_datadir = 0;
67 /* Non-zero if GDB_DATADIR was provided on the command line.
68 This doesn't track whether data-directory is set later from the
69 command line, but we don't reread system.gdbinit when that happens. */
70 static int gdb_datadir_provided = 0;
72 /* If gdb was configured with --with-python=/path,
73 the possibly relocated path to python's lib directory. */
74 char *python_libdir = 0;
76 struct ui_file *gdb_stdout;
77 struct ui_file *gdb_stderr;
78 struct ui_file *gdb_stdlog;
79 struct ui_file *gdb_stdin;
80 /* Target IO streams. */
81 struct ui_file *gdb_stdtargin;
82 struct ui_file *gdb_stdtarg;
83 struct ui_file *gdb_stdtargerr;
85 /* True if --batch or --batch-silent was seen. */
88 /* Support for the --batch-silent option. */
91 /* Support for --return-child-result option.
92 Set the default to -1 to return error in the case
93 that the program does not run or does not complete. */
94 int return_child_result = 0;
95 int return_child_result_value = -1;
98 /* GDB as it has been invoked from the command line (i.e. argv[0]). */
99 static char *gdb_program_name;
101 /* Return read only pointer to GDB_PROGRAM_NAME. */
103 get_gdb_program_name (void)
105 return gdb_program_name;
108 static void print_gdb_help (struct ui_file *);
110 /* Set the data-directory parameter to NEW_DATADIR.
111 If NEW_DATADIR is not a directory then a warning is printed.
112 We don't signal an error for backward compatibility. */
115 set_gdb_data_directory (const char *new_datadir)
119 if (stat (new_datadir, &st) < 0)
121 int save_errno = errno;
123 fprintf_unfiltered (gdb_stderr, "Warning: ");
124 print_sys_errmsg (new_datadir, save_errno);
126 else if (!S_ISDIR (st.st_mode))
127 warning (_("%s is not a directory."), new_datadir);
130 gdb_datadir = gdb_realpath (new_datadir);
132 /* gdb_realpath won't return an absolute path if the path doesn't exist,
133 but we still want to record an absolute path here. If the user entered
134 "../foo" and "../foo" doesn't exist then we'll record $(pwd)/../foo which
135 isn't canonical, but that's ok. */
136 if (!IS_ABSOLUTE_PATH (gdb_datadir))
138 char *abs_datadir = gdb_abspath (gdb_datadir);
141 gdb_datadir = abs_datadir;
145 /* Relocate a file or directory. PROGNAME is the name by which gdb
146 was invoked (i.e., argv[0]). INITIAL is the default value for the
147 file or directory. FLAG is true if the value is relocatable, false
148 otherwise. Returns a newly allocated string; this may return NULL
149 under the same conditions as make_relative_prefix. */
152 relocate_path (const char *progname, const char *initial, int flag)
155 return make_relative_prefix (progname, BINDIR, initial);
156 return xstrdup (initial);
159 /* Like relocate_path, but specifically checks for a directory.
160 INITIAL is relocated according to the rules of relocate_path. If
161 the result is a directory, it is used; otherwise, INITIAL is used.
162 The chosen directory is then canonicalized using lrealpath. This
163 function always returns a newly-allocated string. */
166 relocate_gdb_directory (const char *initial, int flag)
170 dir = relocate_path (gdb_program_name, initial, flag);
175 if (*dir == '\0' || stat (dir, &s) != 0 || !S_ISDIR (s.st_mode))
182 dir = xstrdup (initial);
184 /* Canonicalize the directory. */
187 char *canon_sysroot = lrealpath (dir);
199 /* Compute the locations of init files that GDB should source and
200 return them in SYSTEM_GDBINIT, HOME_GDBINIT, LOCAL_GDBINIT. If
201 there is no system gdbinit (resp. home gdbinit and local gdbinit)
202 to be loaded, then SYSTEM_GDBINIT (resp. HOME_GDBINIT and
203 LOCAL_GDBINIT) is set to NULL. */
205 get_init_files (const char **system_gdbinit,
206 const char **home_gdbinit,
207 const char **local_gdbinit)
209 static const char *sysgdbinit = NULL;
210 static char *homeinit = NULL;
211 static const char *localinit = NULL;
212 static int initialized = 0;
216 struct stat homebuf, cwdbuf, s;
219 if (SYSTEM_GDBINIT[0])
221 int datadir_len = strlen (GDB_DATADIR);
222 int sys_gdbinit_len = strlen (SYSTEM_GDBINIT);
223 char *relocated_sysgdbinit;
225 /* If SYSTEM_GDBINIT lives in data-directory, and data-directory
226 has been provided, search for SYSTEM_GDBINIT there. */
227 if (gdb_datadir_provided
228 && datadir_len < sys_gdbinit_len
229 && filename_ncmp (SYSTEM_GDBINIT, GDB_DATADIR, datadir_len) == 0
230 && IS_DIR_SEPARATOR (SYSTEM_GDBINIT[datadir_len]))
232 /* Append the part of SYSTEM_GDBINIT that follows GDB_DATADIR
234 char *tmp_sys_gdbinit = xstrdup (SYSTEM_GDBINIT + datadir_len);
237 for (p = tmp_sys_gdbinit; IS_DIR_SEPARATOR (*p); ++p)
239 relocated_sysgdbinit = concat (gdb_datadir, SLASH_STRING, p,
241 xfree (tmp_sys_gdbinit);
245 relocated_sysgdbinit = relocate_path (gdb_program_name,
247 SYSTEM_GDBINIT_RELOCATABLE);
249 if (relocated_sysgdbinit && stat (relocated_sysgdbinit, &s) == 0)
250 sysgdbinit = relocated_sysgdbinit;
252 xfree (relocated_sysgdbinit);
255 homedir = getenv ("HOME");
257 /* If the .gdbinit file in the current directory is the same as
258 the $HOME/.gdbinit file, it should not be sourced. homebuf
259 and cwdbuf are used in that purpose. Make sure that the stats
260 are zero in case one of them fails (this guarantees that they
261 won't match if either exists). */
263 memset (&homebuf, 0, sizeof (struct stat));
264 memset (&cwdbuf, 0, sizeof (struct stat));
268 homeinit = xstrprintf ("%s/%s", homedir, gdbinit);
269 if (stat (homeinit, &homebuf) != 0)
276 if (stat (gdbinit, &cwdbuf) == 0)
279 || memcmp ((char *) &homebuf, (char *) &cwdbuf,
280 sizeof (struct stat)))
287 *system_gdbinit = sysgdbinit;
288 *home_gdbinit = homeinit;
289 *local_gdbinit = localinit;
292 /* Try to set up an alternate signal stack for SIGSEGV handlers.
293 This allows us to handle SIGSEGV signals generated when the
294 normal process stack is exhausted. If this stack is not set
295 up (sigaltstack is unavailable or fails) and a SIGSEGV is
296 generated when the normal stack is exhausted then the program
297 will behave as though no SIGSEGV handler was installed. */
300 setup_alternate_signal_stack (void)
302 #ifdef HAVE_SIGALTSTACK
305 ss.ss_sp = xmalloc (SIGSTKSZ);
306 ss.ss_size = SIGSTKSZ;
309 sigaltstack(&ss, NULL);
313 /* Call command_loop. If it happens to return, pass that through as a
314 non-zero return status. */
317 captured_command_loop (void *data)
319 /* Top-level execution commands can be run in the background from
321 interpreter_async = 1;
323 current_interp_command_loop ();
324 /* FIXME: cagney/1999-11-05: A correct command_loop() implementaton
325 would clean things up (restoring the cleanup chain) to the state
326 they were just prior to the call. Technically, this means that
327 the do_cleanups() below is redundant. Unfortunately, many FUNCs
328 are not that well behaved. do_cleanups should either be replaced
329 with a do_cleanups call (to cover the problem) or an assertion
330 check to detect bad FUNCs code. */
331 do_cleanups (all_cleanups ());
332 /* If the command_loop returned, normally (rather than threw an
333 error) we try to quit. If the quit is aborted, catch_errors()
334 which called this catch the signal and restart the command
336 quit_command (NULL, instream == stdin);
340 /* Arguments of --command option and its counterpart. */
341 typedef struct cmdarg {
342 /* Type of this option. */
344 /* Option type -x. */
347 /* Option type -ex. */
350 /* Option type -ix. */
353 /* Option type -iex. */
357 /* Value of this option - filename or the GDB command itself. String memory
358 is not owned by this structure despite it is 'const'. */
362 /* Define type VEC (cmdarg_s). */
363 DEF_VEC_O (cmdarg_s);
366 captured_main (void *data)
368 struct captured_main_args *context = data;
369 int argc = context->argc;
370 char **argv = context->argv;
371 static int quiet = 0;
372 static int set_args = 0;
373 static int inhibit_home_gdbinit = 0;
375 /* Pointers to various arguments from command line. */
377 char *execarg = NULL;
379 char *corearg = NULL;
380 char *pid_or_core_arg = NULL;
384 /* These are static so that we can take their address in an
386 static int print_help;
387 static int print_version;
388 static int print_configuration;
390 /* Pointers to all arguments of --command option. */
391 VEC (cmdarg_s) *cmdarg_vec = NULL;
392 struct cmdarg *cmdarg_p;
394 /* Indices of all arguments of --directory option. */
396 /* Allocated size. */
398 /* Number of elements used. */
401 /* gdb init files. */
402 const char *system_gdbinit;
403 const char *home_gdbinit;
404 const char *local_gdbinit;
408 struct objfile *objfile;
410 struct cleanup *pre_stat_chain;
413 /* Set this before calling make_command_stats_cleanup. */
414 lim_at_start = (char *) sbrk (0);
417 pre_stat_chain = make_command_stats_cleanup (0);
419 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
420 setlocale (LC_MESSAGES, "");
422 #if defined (HAVE_SETLOCALE)
423 setlocale (LC_CTYPE, "");
425 bindtextdomain (PACKAGE, LOCALEDIR);
426 textdomain (PACKAGE);
431 make_cleanup (VEC_cleanup (cmdarg_s), &cmdarg_vec);
433 dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg));
437 saved_command_line = (char *) xmalloc (saved_command_line_size);
438 saved_command_line[0] = '\0';
442 /* Ensure stderr is unbuffered. A Cygwin pty or pipe is implemented
443 as a Windows pipe, and Windows buffers on pipes. */
444 setvbuf (stderr, NULL, _IONBF, BUFSIZ);
447 gdb_stdout = stdio_fileopen (stdout);
448 gdb_stderr = stderr_fileopen ();
450 gdb_stdlog = gdb_stderr; /* for moment */
451 gdb_stdtarg = gdb_stderr; /* for moment */
452 gdb_stdin = stdio_fileopen (stdin);
453 gdb_stdtargerr = gdb_stderr; /* for moment */
454 gdb_stdtargin = gdb_stdin; /* for moment */
457 /* On Windows, argv[0] is not necessarily set to absolute form when
458 GDB is found along PATH, without which relocation doesn't work. */
459 gdb_program_name = windows_get_absolute_argv0 (argv[0]);
461 gdb_program_name = xstrdup (argv[0]);
464 if (! getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)))
465 /* Don't use *_filtered or warning() (which relies on
466 current_target) until after initialize_all_files(). */
467 fprintf_unfiltered (gdb_stderr,
468 _("%s: warning: error finding "
469 "working directory: %s\n"),
470 argv[0], safe_strerror (errno));
472 current_directory = gdb_dirbuf;
474 /* Set the sysroot path. */
475 gdb_sysroot = relocate_gdb_directory (TARGET_SYSTEM_ROOT,
476 TARGET_SYSTEM_ROOT_RELOCATABLE);
478 debug_file_directory = relocate_gdb_directory (DEBUGDIR,
479 DEBUGDIR_RELOCATABLE);
481 gdb_datadir = relocate_gdb_directory (GDB_DATADIR,
482 GDB_DATADIR_RELOCATABLE);
484 #ifdef WITH_PYTHON_PATH
486 /* For later use in helping Python find itself. */
487 char *tmp = concat (WITH_PYTHON_PATH, SLASH_STRING, "lib", NULL);
489 python_libdir = relocate_gdb_directory (tmp, PYTHON_PATH_RELOCATABLE);
495 add_substitute_path_rule (RELOC_SRCDIR,
496 make_relative_prefix (gdb_program_name, BINDIR,
500 /* There will always be an interpreter. Either the one passed into
501 this captured main, or one specified by the user at start up, or
502 the console. Initialize the interpreter to the one requested by
504 interpreter_p = xstrdup (context->interpreter_p);
506 /* Parse arguments and options. */
509 /* When var field is 0, use flag field to record the equivalent
510 short option (or arbitrary numbers starting at 10 for those
511 with no equivalent). */
523 static struct option long_options[] =
525 {"tui", no_argument, 0, OPT_TUI},
526 {"xdb", no_argument, &xdb_commands, 1},
527 {"dbx", no_argument, &dbx_commands, 1},
528 {"readnow", no_argument, &readnow_symbol_files, 1},
529 {"r", no_argument, &readnow_symbol_files, 1},
530 {"quiet", no_argument, &quiet, 1},
531 {"q", no_argument, &quiet, 1},
532 {"silent", no_argument, &quiet, 1},
533 {"nh", no_argument, &inhibit_home_gdbinit, 1},
534 {"nx", no_argument, &inhibit_gdbinit, 1},
535 {"n", no_argument, &inhibit_gdbinit, 1},
536 {"batch-silent", no_argument, 0, 'B'},
537 {"batch", no_argument, &batch_flag, 1},
539 /* This is a synonym for "--annotate=1". --annotate is now
540 preferred, but keep this here for a long time because people
541 will be running emacses which use --fullname. */
542 {"fullname", no_argument, 0, 'f'},
543 {"f", no_argument, 0, 'f'},
545 {"annotate", required_argument, 0, OPT_ANNOTATE},
546 {"help", no_argument, &print_help, 1},
547 {"se", required_argument, 0, OPT_SE},
548 {"symbols", required_argument, 0, 's'},
549 {"s", required_argument, 0, 's'},
550 {"exec", required_argument, 0, 'e'},
551 {"e", required_argument, 0, 'e'},
552 {"core", required_argument, 0, 'c'},
553 {"c", required_argument, 0, 'c'},
554 {"pid", required_argument, 0, 'p'},
555 {"p", required_argument, 0, 'p'},
556 {"command", required_argument, 0, 'x'},
557 {"eval-command", required_argument, 0, 'X'},
558 {"version", no_argument, &print_version, 1},
559 {"configuration", no_argument, &print_configuration, 1},
560 {"x", required_argument, 0, 'x'},
561 {"ex", required_argument, 0, 'X'},
562 {"init-command", required_argument, 0, OPT_IX},
563 {"init-eval-command", required_argument, 0, OPT_IEX},
564 {"ix", required_argument, 0, OPT_IX},
565 {"iex", required_argument, 0, OPT_IEX},
567 {"tclcommand", required_argument, 0, 'z'},
568 {"enable-external-editor", no_argument, 0, 'y'},
569 {"editor-command", required_argument, 0, 'w'},
571 {"ui", required_argument, 0, 'i'},
572 {"interpreter", required_argument, 0, 'i'},
573 {"i", required_argument, 0, 'i'},
574 {"directory", required_argument, 0, 'd'},
575 {"d", required_argument, 0, 'd'},
576 {"data-directory", required_argument, 0, 'D'},
577 {"D", required_argument, 0, 'D'},
578 {"cd", required_argument, 0, OPT_CD},
579 {"tty", required_argument, 0, 't'},
580 {"baud", required_argument, 0, 'b'},
581 {"b", required_argument, 0, 'b'},
582 {"nw", no_argument, NULL, OPT_NOWINDOWS},
583 {"nowindows", no_argument, NULL, OPT_NOWINDOWS},
584 {"w", no_argument, NULL, OPT_WINDOWS},
585 {"windows", no_argument, NULL, OPT_WINDOWS},
586 {"statistics", no_argument, 0, OPT_STATISTICS},
587 {"write", no_argument, &write_files, 1},
588 {"args", no_argument, &set_args, 1},
589 {"l", required_argument, 0, 'l'},
590 {"return-child-result", no_argument, &return_child_result, 1},
591 {0, no_argument, 0, 0}
598 c = getopt_long_only (argc, argv, "",
599 long_options, &option_index);
600 if (c == EOF || set_args)
603 /* Long option that takes an argument. */
604 if (c == 0 && long_options[option_index].flag == 0)
605 c = long_options[option_index].val;
610 /* Long option that just sets a flag. */
620 /* FIXME: what if the syntax is wrong (e.g. not digits)? */
621 annotation_level = atoi (optarg);
624 /* Enable the display of both time and space usage. */
625 set_per_command_time (1);
626 set_per_command_space (1);
629 /* --tui is equivalent to -i=tui. */
631 xfree (interpreter_p);
632 interpreter_p = xstrdup (INTERP_TUI);
634 fprintf_unfiltered (gdb_stderr,
635 _("%s: TUI mode is not supported\n"),
641 /* FIXME: cagney/2003-03-01: Not sure if this option is
642 actually useful, and if it is, what it should do. */
644 /* --windows is equivalent to -i=insight. */
645 xfree (interpreter_p);
646 interpreter_p = xstrdup (INTERP_INSIGHT);
650 /* -nw is equivalent to -i=console. */
651 xfree (interpreter_p);
652 interpreter_p = xstrdup (INTERP_CONSOLE);
655 annotation_level = 1;
671 struct cmdarg cmdarg = { CMDARG_FILE, optarg };
673 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
678 struct cmdarg cmdarg = { CMDARG_COMMAND, optarg };
680 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
685 struct cmdarg cmdarg = { CMDARG_INIT_FILE, optarg };
687 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
692 struct cmdarg cmdarg = { CMDARG_INIT_COMMAND, optarg };
694 VEC_safe_push (cmdarg_s, cmdarg_vec, &cmdarg);
698 batch_flag = batch_silent = 1;
699 gdb_stdout = ui_file_new();
702 if (optarg[0] == '\0')
704 fprintf_unfiltered (gdb_stderr,
705 _("%s: empty path for"
706 " `--data-directory'\n"),
710 set_gdb_data_directory (optarg);
711 gdb_datadir_provided = 1;
716 extern int gdbtk_test (char *);
718 if (!gdbtk_test (optarg))
720 fprintf_unfiltered (gdb_stderr,
721 _("%s: unable to load "
722 "tclcommand file \"%s\""),
729 /* Backwards compatibility only. */
733 /* Set the external editor commands when gdb is farming out files
734 to be edited by another program. */
735 extern char *external_editor_command;
737 external_editor_command = xstrdup (optarg);
742 xfree (interpreter_p);
743 interpreter_p = xstrdup (optarg);
746 dirarg[ndir++] = optarg;
750 dirarg = (char **) xrealloc ((char *) dirarg,
751 dirsize * sizeof (*dirarg));
765 i = strtol (optarg, &p, 0);
766 if (i == 0 && p == optarg)
768 /* Don't use *_filtered or warning() (which relies on
769 current_target) until after initialize_all_files(). */
773 _("warning: could not set baud rate to `%s'.\n"), optarg);
783 i = strtol (optarg, &p, 0);
784 if (i == 0 && p == optarg)
786 /* Don't use *_filtered or warning() (which relies on
787 current_target) until after initialize_all_files(). */
789 fprintf_unfiltered (gdb_stderr,
790 _("warning: could not set "
791 "timeout limit to `%s'.\n"), optarg);
798 fprintf_unfiltered (gdb_stderr,
799 _("Use `%s --help' for a "
800 "complete list of options.\n"),
810 /* Try to set up an alternate signal stack for SIGSEGV handlers. */
811 setup_alternate_signal_stack ();
813 /* Initialize all files. Give the interpreter a chance to take
814 control of the console via the deprecated_init_ui_hook (). */
815 gdb_init (gdb_program_name);
817 /* Now that gdb_init has created the initial inferior, we're in
818 position to set args for that inferior. */
821 /* The remaining options are the command-line options for the
822 inferior. The first one is the sym/exec file, and the rest
826 fprintf_unfiltered (gdb_stderr,
827 _("%s: `--args' specified but "
828 "no program specified\n"),
832 symarg = argv[optind];
833 execarg = argv[optind];
835 set_inferior_args_vector (argc - optind, &argv[optind]);
839 /* OK, that's all the options. */
841 /* The first argument, if specified, is the name of the
845 symarg = argv[optind];
846 execarg = argv[optind];
850 /* If the user hasn't already specified a PID or the name of a
851 core file, then a second optional argument is allowed. If
852 present, this argument should be interpreted as either a
853 PID or a core file, whichever works. */
854 if (pidarg == NULL && corearg == NULL && optind < argc)
856 pid_or_core_arg = argv[optind];
860 /* Any argument left on the command line is unexpected and
861 will be ignored. Inform the user. */
863 fprintf_unfiltered (gdb_stderr,
864 _("Excess command line "
865 "arguments ignored. (%s%s)\n"),
867 (optind == argc - 1) ? "" : " ...");
870 /* Lookup gdbinit files. Note that the gdbinit file name may be
871 overriden during file initialization, so get_init_files should be
872 called after gdb_init. */
873 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
875 /* Do these (and anything which might call wrap_here or *_filtered)
876 after initialize_all_files() but before the interpreter has been
877 installed. Otherwize the help/version messages will be eaten by
878 the interpreter's output handler. */
882 print_gdb_version (gdb_stdout);
884 printf_filtered ("\n");
890 print_gdb_help (gdb_stdout);
891 fputs_unfiltered ("\n", gdb_stdout);
895 if (print_configuration)
897 print_gdb_configuration (gdb_stdout);
899 printf_filtered ("\n");
903 /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
904 GDB retain the old MI1 interpreter startup behavior. Output the
905 copyright message before the interpreter is installed. That way
906 it isn't encapsulated in MI output. */
907 if (!quiet && strcmp (interpreter_p, INTERP_MI1) == 0)
909 /* Print all the junk at the top, with trailing "..." if we are
910 about to read a symbol file (possibly slowly). */
911 print_gdb_version (gdb_stdout);
913 printf_filtered ("..");
915 printf_filtered ("\n");
916 gdb_flush (gdb_stdout); /* Force to screen during slow
920 /* Install the default UI. All the interpreters should have had a
921 look at things by now. Initialize the default interpreter. */
925 struct interp *interp = interp_lookup (interpreter_p);
928 error (_("Interpreter `%s' unrecognized"), interpreter_p);
930 if (!interp_set (interp, 1))
932 fprintf_unfiltered (gdb_stderr,
933 "Interpreter `%s' failed to initialize.\n",
939 /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets
940 GDB retain the old MI1 interpreter startup behavior. Output the
941 copyright message after the interpreter is installed when it is
942 any sane interpreter. */
943 if (!quiet && !current_interp_named_p (INTERP_MI1))
945 /* Print all the junk at the top, with trailing "..." if we are
946 about to read a symbol file (possibly slowly). */
947 print_gdb_version (gdb_stdout);
949 printf_filtered ("..");
951 printf_filtered ("\n");
952 gdb_flush (gdb_stdout); /* Force to screen during slow
956 /* Set off error and warning messages with a blank line. */
957 warning_pre_print = _("\nwarning: ");
959 /* Read and execute the system-wide gdbinit file, if it exists.
960 This is done *before* all the command line arguments are
961 processed; it sets global parameters, which are independent of
962 what file you are debugging or what directory you are in. */
963 if (system_gdbinit && !inhibit_gdbinit)
964 catch_command_errors_const (source_script, system_gdbinit,
967 /* Read and execute $HOME/.gdbinit file, if it exists. This is done
968 *before* all the command line arguments are processed; it sets
969 global parameters, which are independent of what file you are
970 debugging or what directory you are in. */
972 if (home_gdbinit && !inhibit_gdbinit && !inhibit_home_gdbinit)
973 catch_command_errors_const (source_script,
974 home_gdbinit, 0, RETURN_MASK_ALL);
976 /* Process '-ix' and '-iex' options early. */
977 for (i = 0; VEC_iterate (cmdarg_s, cmdarg_vec, i, cmdarg_p); i++)
978 switch (cmdarg_p->type)
980 case CMDARG_INIT_FILE:
981 catch_command_errors_const (source_script, cmdarg_p->string,
982 !batch_flag, RETURN_MASK_ALL);
984 case CMDARG_INIT_COMMAND:
985 catch_command_errors (execute_command, cmdarg_p->string,
986 !batch_flag, RETURN_MASK_ALL);
990 /* Now perform all the actions indicated by the arguments. */
993 catch_command_errors (cd_command, cdarg, 0, RETURN_MASK_ALL);
996 for (i = 0; i < ndir; i++)
997 catch_command_errors (directory_switch, dirarg[i], 0, RETURN_MASK_ALL);
1000 /* Skip auto-loading section-specified scripts until we've sourced
1001 local_gdbinit (which is often used to augment the source search
1003 save_auto_load = global_auto_load;
1004 global_auto_load = 0;
1008 && strcmp (execarg, symarg) == 0)
1010 /* The exec file and the symbol-file are the same. If we can't
1011 open it, better only print one error message.
1012 catch_command_errors returns non-zero on success! */
1013 if (catch_command_errors (exec_file_attach, execarg,
1014 !batch_flag, RETURN_MASK_ALL))
1015 catch_command_errors_const (symbol_file_add_main, symarg,
1016 !batch_flag, RETURN_MASK_ALL);
1020 if (execarg != NULL)
1021 catch_command_errors (exec_file_attach, execarg,
1022 !batch_flag, RETURN_MASK_ALL);
1024 catch_command_errors_const (symbol_file_add_main, symarg,
1025 !batch_flag, RETURN_MASK_ALL);
1028 if (corearg && pidarg)
1029 error (_("Can't attach to process and specify "
1030 "a core file at the same time."));
1032 if (corearg != NULL)
1033 catch_command_errors (core_file_command, corearg,
1034 !batch_flag, RETURN_MASK_ALL);
1035 else if (pidarg != NULL)
1036 catch_command_errors (attach_command, pidarg,
1037 !batch_flag, RETURN_MASK_ALL);
1038 else if (pid_or_core_arg)
1040 /* The user specified 'gdb program pid' or gdb program core'.
1041 If pid_or_core_arg's first character is a digit, try attach
1042 first and then corefile. Otherwise try just corefile. */
1044 if (isdigit (pid_or_core_arg[0]))
1046 if (catch_command_errors (attach_command, pid_or_core_arg,
1047 !batch_flag, RETURN_MASK_ALL) == 0)
1048 catch_command_errors (core_file_command, pid_or_core_arg,
1049 !batch_flag, RETURN_MASK_ALL);
1051 else /* Can't be a pid, better be a corefile. */
1052 catch_command_errors (core_file_command, pid_or_core_arg,
1053 !batch_flag, RETURN_MASK_ALL);
1057 set_inferior_io_terminal (ttyarg);
1059 /* Error messages should no longer be distinguished with extra output. */
1060 warning_pre_print = _("warning: ");
1062 /* Read the .gdbinit file in the current directory, *if* it isn't
1063 the same as the $HOME/.gdbinit file (it should exist, also). */
1066 auto_load_local_gdbinit_pathname = gdb_realpath (local_gdbinit);
1068 if (!inhibit_gdbinit && auto_load_local_gdbinit
1069 && file_is_auto_load_safe (local_gdbinit,
1070 _("auto-load: Loading .gdbinit "
1074 auto_load_local_gdbinit_loaded = 1;
1076 catch_command_errors_const (source_script, local_gdbinit, 0,
1081 /* Now that all .gdbinit's have been read and all -d options have been
1082 processed, we can read any scripts mentioned in SYMARG.
1083 We wait until now because it is common to add to the source search
1084 path in local_gdbinit. */
1085 global_auto_load = save_auto_load;
1086 ALL_OBJFILES (objfile)
1087 load_auto_scripts_for_objfile (objfile);
1089 /* Process '-x' and '-ex' options. */
1090 for (i = 0; VEC_iterate (cmdarg_s, cmdarg_vec, i, cmdarg_p); i++)
1091 switch (cmdarg_p->type)
1094 catch_command_errors_const (source_script, cmdarg_p->string,
1095 !batch_flag, RETURN_MASK_ALL);
1097 case CMDARG_COMMAND:
1098 catch_command_errors (execute_command, cmdarg_p->string,
1099 !batch_flag, RETURN_MASK_ALL);
1103 /* Read in the old history after all the command files have been
1109 /* We have hit the end of the batch file. */
1110 quit_force (NULL, 0);
1113 /* Show time and/or space usage. */
1114 do_cleanups (pre_stat_chain);
1116 /* NOTE: cagney/1999-11-07: There is probably no reason for not
1117 moving this loop and the code found in captured_command_loop()
1118 into the command_loop() proper. The main thing holding back that
1119 change - SET_TOP_LEVEL() - has been eliminated. */
1122 catch_errors (captured_command_loop, 0, "", RETURN_MASK_ALL);
1124 /* No exit -- exit is through quit_command. */
1128 gdb_main (struct captured_main_args *args)
1130 catch_errors (captured_main, args, "", RETURN_MASK_ALL);
1131 /* The only way to end up here is by an error (normal exit is
1132 handled by quit_force()), hence always return an error status. */
1137 /* Don't use *_filtered for printing help. We don't want to prompt
1138 for continue no matter how small the screen or how much we're going
1142 print_gdb_help (struct ui_file *stream)
1144 const char *system_gdbinit;
1145 const char *home_gdbinit;
1146 const char *local_gdbinit;
1148 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
1150 /* Note: The options in the list below are only approximately sorted
1151 in the alphabetical order, so as to group closely related options
1153 fputs_unfiltered (_("\
1154 This is the GNU debugger. Usage:\n\n\
1155 gdb [options] [executable-file [core-file or process-id]]\n\
1156 gdb [options] --args executable-file [inferior-arguments ...]\n\n\
1158 fputs_unfiltered (_("\
1159 Selection of debuggee and its files:\n\n\
1160 --args Arguments after executable-file are passed to inferior\n\
1161 --core=COREFILE Analyze the core dump COREFILE.\n\
1162 --exec=EXECFILE Use EXECFILE as the executable.\n\
1163 --pid=PID Attach to running process PID.\n\
1164 --directory=DIR Search for source files in DIR.\n\
1165 --se=FILE Use FILE as symbol file and executable file.\n\
1166 --symbols=SYMFILE Read symbols from SYMFILE.\n\
1167 --readnow Fully read symbol files on first access.\n\
1168 --write Set writing into executable and core files.\n\n\
1170 fputs_unfiltered (_("\
1171 Initial commands and command files:\n\n\
1172 --command=FILE, -x Execute GDB commands from FILE.\n\
1173 --init-command=FILE, -ix\n\
1174 Like -x but execute commands before loading inferior.\n\
1175 --eval-command=COMMAND, -ex\n\
1176 Execute a single GDB command.\n\
1177 May be used multiple times and in conjunction\n\
1179 --init-eval-command=COMMAND, -iex\n\
1180 Like -ex but before loading inferior.\n\
1181 --nh Do not read ~/.gdbinit.\n\
1182 --nx Do not read any .gdbinit files in any directory.\n\n\
1184 fputs_unfiltered (_("\
1185 Output and user interface control:\n\n\
1186 --fullname Output information used by emacs-GDB interface.\n\
1187 --interpreter=INTERP\n\
1188 Select a specific interpreter / user interface\n\
1189 --tty=TTY Use TTY for input/output by the program being debugged.\n\
1190 -w Use the GUI interface.\n\
1191 --nw Do not use the GUI interface.\n\
1194 fputs_unfiltered (_("\
1195 --tui Use a terminal user interface.\n\
1198 fputs_unfiltered (_("\
1199 --dbx DBX compatibility mode.\n\
1200 --xdb XDB compatibility mode.\n\
1201 -q, --quiet, --silent\n\
1202 Do not print version number on startup.\n\n\
1204 fputs_unfiltered (_("\
1205 Operating modes:\n\n\
1206 --batch Exit after processing options.\n\
1207 --batch-silent Like --batch, but suppress all gdb stdout output.\n\
1208 --return-child-result\n\
1209 GDB exit code will be the child's exit code.\n\
1210 --configuration Print details about GDB configuration and then exit.\n\
1211 --help Print this message and then exit.\n\
1212 --version Print version information and then exit.\n\n\
1213 Remote debugging options:\n\n\
1214 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
1215 -l TIMEOUT Set timeout in seconds for remote debugging.\n\n\
1217 --cd=DIR Change current directory to DIR.\n\
1218 --data-directory=DIR, -D\n\
1219 Set GDB's data-directory to DIR.\n\
1221 fputs_unfiltered (_("\n\
1222 At startup, GDB reads the following init files and executes their commands:\n\
1225 fprintf_unfiltered (stream, _("\
1226 * system-wide init file: %s\n\
1227 "), system_gdbinit);
1229 fprintf_unfiltered (stream, _("\
1230 * user-specific init file: %s\n\
1233 fprintf_unfiltered (stream, _("\
1234 * local init file (see also 'set auto-load local-gdbinit'): ./%s\n\
1236 fputs_unfiltered (_("\n\
1237 For more information, type \"help\" from within GDB, or consult the\n\
1238 GDB manual (available as on-line info or a printed manual).\n\
1240 if (REPORT_BUGS_TO[0] && stream == gdb_stdout)
1241 fprintf_unfiltered (stream, _("\
1242 Report bugs to \"%s\".\n\
1243 "), REPORT_BUGS_TO);