1 /* Top level stuff for GDB, the GNU debugger.
3 Copyright (C) 1986-2017 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/>. */
28 #include <sys/types.h>
31 #include "event-loop.h"
37 #include "cli/cli-cmds.h"
39 #include "auto-load.h"
42 #include "filenames.h"
43 #include "filestuff.h"
45 #include "event-top.h"
47 #include "signals-state-save-restore.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 dbx commands will be handled. */
58 /* System root path, used to find libraries etc. */
59 char *gdb_sysroot = 0;
61 /* GDB datadir, used to store data files. */
62 char *gdb_datadir = 0;
64 /* Non-zero if GDB_DATADIR was provided on the command line.
65 This doesn't track whether data-directory is set later from the
66 command line, but we don't reread system.gdbinit when that happens. */
67 static int gdb_datadir_provided = 0;
69 /* If gdb was configured with --with-python=/path,
70 the possibly relocated path to python's lib directory. */
71 char *python_libdir = 0;
73 /* Target IO streams. */
74 struct ui_file *gdb_stdtargin;
75 struct ui_file *gdb_stdtarg;
76 struct ui_file *gdb_stdtargerr;
78 /* True if --batch or --batch-silent was seen. */
81 /* Support for the --batch-silent option. */
84 /* Support for --return-child-result option.
85 Set the default to -1 to return error in the case
86 that the program does not run or does not complete. */
87 int return_child_result = 0;
88 int return_child_result_value = -1;
91 /* GDB as it has been invoked from the command line (i.e. argv[0]). */
92 static char *gdb_program_name;
94 /* Return read only pointer to GDB_PROGRAM_NAME. */
96 get_gdb_program_name (void)
98 return gdb_program_name;
101 static void print_gdb_help (struct ui_file *);
103 /* Set the data-directory parameter to NEW_DATADIR.
104 If NEW_DATADIR is not a directory then a warning is printed.
105 We don't signal an error for backward compatibility. */
108 set_gdb_data_directory (const char *new_datadir)
112 if (stat (new_datadir, &st) < 0)
114 int save_errno = errno;
116 fprintf_unfiltered (gdb_stderr, "Warning: ");
117 print_sys_errmsg (new_datadir, save_errno);
119 else if (!S_ISDIR (st.st_mode))
120 warning (_("%s is not a directory."), new_datadir);
123 gdb_datadir = gdb_realpath (new_datadir).release ();
125 /* gdb_realpath won't return an absolute path if the path doesn't exist,
126 but we still want to record an absolute path here. If the user entered
127 "../foo" and "../foo" doesn't exist then we'll record $(pwd)/../foo which
128 isn't canonical, but that's ok. */
129 if (!IS_ABSOLUTE_PATH (gdb_datadir))
131 gdb::unique_xmalloc_ptr<char> abs_datadir = gdb_abspath (gdb_datadir);
134 gdb_datadir = abs_datadir.release ();
138 /* Relocate a file or directory. PROGNAME is the name by which gdb
139 was invoked (i.e., argv[0]). INITIAL is the default value for the
140 file or directory. FLAG is true if the value is relocatable, false
141 otherwise. Returns a newly allocated string; this may return NULL
142 under the same conditions as make_relative_prefix. */
145 relocate_path (const char *progname, const char *initial, int flag)
148 return make_relative_prefix (progname, BINDIR, initial);
149 return xstrdup (initial);
152 /* Like relocate_path, but specifically checks for a directory.
153 INITIAL is relocated according to the rules of relocate_path. If
154 the result is a directory, it is used; otherwise, INITIAL is used.
155 The chosen directory is then canonicalized using lrealpath. This
156 function always returns a newly-allocated string. */
159 relocate_gdb_directory (const char *initial, int flag)
163 dir = relocate_path (gdb_program_name, initial, flag);
168 if (*dir == '\0' || stat (dir, &s) != 0 || !S_ISDIR (s.st_mode))
175 dir = xstrdup (initial);
177 /* Canonicalize the directory. */
180 char *canon_sysroot = lrealpath (dir);
192 /* Compute the locations of init files that GDB should source and
193 return them in SYSTEM_GDBINIT, HOME_GDBINIT, LOCAL_GDBINIT. If
194 there is no system gdbinit (resp. home gdbinit and local gdbinit)
195 to be loaded, then SYSTEM_GDBINIT (resp. HOME_GDBINIT and
196 LOCAL_GDBINIT) is set to NULL. */
198 get_init_files (const char **system_gdbinit,
199 const char **home_gdbinit,
200 const char **local_gdbinit)
202 static const char *sysgdbinit = NULL;
203 static char *homeinit = NULL;
204 static const char *localinit = NULL;
205 static int initialized = 0;
209 struct stat homebuf, cwdbuf, s;
212 if (SYSTEM_GDBINIT[0])
214 int datadir_len = strlen (GDB_DATADIR);
215 int sys_gdbinit_len = strlen (SYSTEM_GDBINIT);
216 char *relocated_sysgdbinit;
218 /* If SYSTEM_GDBINIT lives in data-directory, and data-directory
219 has been provided, search for SYSTEM_GDBINIT there. */
220 if (gdb_datadir_provided
221 && datadir_len < sys_gdbinit_len
222 && filename_ncmp (SYSTEM_GDBINIT, GDB_DATADIR, datadir_len) == 0
223 && IS_DIR_SEPARATOR (SYSTEM_GDBINIT[datadir_len]))
225 /* Append the part of SYSTEM_GDBINIT that follows GDB_DATADIR
227 char *tmp_sys_gdbinit = xstrdup (&SYSTEM_GDBINIT[datadir_len]);
230 for (p = tmp_sys_gdbinit; IS_DIR_SEPARATOR (*p); ++p)
232 relocated_sysgdbinit = concat (gdb_datadir, SLASH_STRING, p,
234 xfree (tmp_sys_gdbinit);
238 relocated_sysgdbinit = relocate_path (gdb_program_name,
240 SYSTEM_GDBINIT_RELOCATABLE);
242 if (relocated_sysgdbinit && stat (relocated_sysgdbinit, &s) == 0)
243 sysgdbinit = relocated_sysgdbinit;
245 xfree (relocated_sysgdbinit);
248 homedir = getenv ("HOME");
250 /* If the .gdbinit file in the current directory is the same as
251 the $HOME/.gdbinit file, it should not be sourced. homebuf
252 and cwdbuf are used in that purpose. Make sure that the stats
253 are zero in case one of them fails (this guarantees that they
254 won't match if either exists). */
256 memset (&homebuf, 0, sizeof (struct stat));
257 memset (&cwdbuf, 0, sizeof (struct stat));
261 homeinit = xstrprintf ("%s/%s", homedir, gdbinit);
262 if (stat (homeinit, &homebuf) != 0)
269 if (stat (gdbinit, &cwdbuf) == 0)
272 || memcmp ((char *) &homebuf, (char *) &cwdbuf,
273 sizeof (struct stat)))
280 *system_gdbinit = sysgdbinit;
281 *home_gdbinit = homeinit;
282 *local_gdbinit = localinit;
285 /* Try to set up an alternate signal stack for SIGSEGV handlers.
286 This allows us to handle SIGSEGV signals generated when the
287 normal process stack is exhausted. If this stack is not set
288 up (sigaltstack is unavailable or fails) and a SIGSEGV is
289 generated when the normal stack is exhausted then the program
290 will behave as though no SIGSEGV handler was installed. */
293 setup_alternate_signal_stack (void)
295 #ifdef HAVE_SIGALTSTACK
298 /* FreeBSD versions older than 11.0 use char * for ss_sp instead of
299 void *. This cast works with both types. */
300 ss.ss_sp = (char *) xmalloc (SIGSTKSZ);
301 ss.ss_size = SIGSTKSZ;
304 sigaltstack(&ss, NULL);
308 /* Call command_loop. */
311 captured_command_loop ()
313 struct ui *ui = current_ui;
315 /* Top-level execution commands can be run in the background from
317 current_ui->async = 1;
319 /* Give the interpreter a chance to print a prompt, if necessary */
320 if (ui->prompt_state != PROMPT_BLOCKED)
321 interp_pre_command_loop (top_level_interpreter ());
323 /* Now it's time to start the event loop. */
326 /* FIXME: cagney/1999-11-05: A correct command_loop() implementaton
327 would clean things up (restoring the cleanup chain) to the state
328 they were just prior to the call. Technically, this means that
329 the do_cleanups() below is redundant. Unfortunately, many FUNCs
330 are not that well behaved. do_cleanups should either be replaced
331 with a do_cleanups call (to cover the problem) or an assertion
332 check to detect bad FUNCs code. */
333 do_cleanups (all_cleanups ());
334 /* If the command_loop returned, normally (rather than threw an
335 error) we try to quit. If the quit is aborted, our caller
336 catches the signal and restarts the command loop. */
337 quit_command (NULL, ui->instream == ui->stdin_stream);
340 /* Handle command errors thrown from within catch_command_errors. */
343 handle_command_errors (struct gdb_exception e)
347 exception_print (gdb_stderr, e);
349 /* If any exception escaped to here, we better enable stdin.
350 Otherwise, any command that calls async_disable_stdin, and
351 then throws, will leave stdin inoperable. */
352 async_enable_stdin ();
358 /* Type of the command callback passed to catch_command_errors. */
360 typedef void (catch_command_errors_ftype) (char *, int);
362 /* Wrap calls to commands run before the event loop is started. */
365 catch_command_errors (catch_command_errors_ftype *command,
366 char *arg, int from_tty)
370 int was_sync = current_ui->prompt_state == PROMPT_BLOCKED;
372 command (arg, from_tty);
374 maybe_wait_sync_command_done (was_sync);
376 CATCH (e, RETURN_MASK_ALL)
378 return handle_command_errors (e);
385 /* Type of the command callback passed to the const
386 catch_command_errors. */
388 typedef void (catch_command_errors_const_ftype) (const char *, int);
390 /* Const-correct catch_command_errors. */
393 catch_command_errors (catch_command_errors_const_ftype command,
394 const char *arg, int from_tty)
398 int was_sync = current_ui->prompt_state == PROMPT_BLOCKED;
400 command (arg, from_tty);
402 maybe_wait_sync_command_done (was_sync);
404 CATCH (e, RETURN_MASK_ALL)
406 return handle_command_errors (e);
413 /* Adapter for symbol_file_add_main that translates 'from_tty' to a
414 symfile_add_flags. */
417 symbol_file_add_main_adapter (const char *arg, int from_tty)
419 symfile_add_flags add_flags = 0;
422 add_flags |= SYMFILE_VERBOSE;
424 symbol_file_add_main (arg, add_flags);
427 /* Type of this option. */
430 /* Option type -x. */
433 /* Option type -ex. */
436 /* Option type -ix. */
439 /* Option type -iex. */
443 /* Arguments of --command option and its counterpart. */
446 cmdarg (cmdarg_kind type_, char *string_)
447 : type (type_), string (string_)
450 /* Type of this option. */
451 enum cmdarg_kind type;
453 /* Value of this option - filename or the GDB command itself. String memory
454 is not owned by this structure despite it is 'const'. */
459 captured_main_1 (struct captured_main_args *context)
461 int argc = context->argc;
462 char **argv = context->argv;
464 static int quiet = 0;
465 static int set_args = 0;
466 static int inhibit_home_gdbinit = 0;
468 /* Pointers to various arguments from command line. */
470 char *execarg = NULL;
472 char *corearg = NULL;
473 char *pid_or_core_arg = NULL;
477 /* These are static so that we can take their address in an
479 static int print_help;
480 static int print_version;
481 static int print_configuration;
483 /* Pointers to all arguments of --command option. */
484 std::vector<struct cmdarg> cmdarg_vec;
486 /* All arguments of --directory option. */
487 std::vector<char *> dirarg;
489 /* gdb init files. */
490 const char *system_gdbinit;
491 const char *home_gdbinit;
492 const char *local_gdbinit;
496 struct objfile *objfile;
499 /* Set this before constructing scoped_command_stats. */
500 lim_at_start = (char *) sbrk (0);
503 scoped_command_stats stat_reporter (false);
505 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
506 setlocale (LC_MESSAGES, "");
508 #if defined (HAVE_SETLOCALE)
509 setlocale (LC_CTYPE, "");
512 bindtextdomain (PACKAGE, LOCALEDIR);
513 textdomain (PACKAGE);
518 save_original_signals_state ();
520 saved_command_line = (char *) xstrdup ("");
523 /* Ensure stderr is unbuffered. A Cygwin pty or pipe is implemented
524 as a Windows pipe, and Windows buffers on pipes. */
525 setvbuf (stderr, NULL, _IONBF, BUFSIZ);
528 main_ui = new ui (stdin, stdout, stderr);
529 current_ui = main_ui;
531 gdb_stdtargerr = gdb_stderr; /* for moment */
532 gdb_stdtargin = gdb_stdin; /* for moment */
535 /* On Windows, argv[0] is not necessarily set to absolute form when
536 GDB is found along PATH, without which relocation doesn't work. */
537 gdb_program_name = windows_get_absolute_argv0 (argv[0]);
539 gdb_program_name = xstrdup (argv[0]);
542 /* Prefix warning messages with the command name. */
543 gdb::unique_xmalloc_ptr<char> tmp_warn_preprint
544 (xstrprintf ("%s: warning: ", gdb_program_name));
545 warning_pre_print = tmp_warn_preprint.get ();
547 current_directory = getcwd (NULL, 0);
548 if (current_directory == NULL)
549 perror_warning_with_name (_("error finding working directory"));
551 /* Set the sysroot path. */
552 gdb_sysroot = relocate_gdb_directory (TARGET_SYSTEM_ROOT,
553 TARGET_SYSTEM_ROOT_RELOCATABLE);
555 if (gdb_sysroot == NULL || *gdb_sysroot == '\0')
558 gdb_sysroot = xstrdup (TARGET_SYSROOT_PREFIX);
561 debug_file_directory = relocate_gdb_directory (DEBUGDIR,
562 DEBUGDIR_RELOCATABLE);
564 gdb_datadir = relocate_gdb_directory (GDB_DATADIR,
565 GDB_DATADIR_RELOCATABLE);
567 #ifdef WITH_PYTHON_PATH
569 /* For later use in helping Python find itself. */
570 char *tmp = concat (WITH_PYTHON_PATH, SLASH_STRING, "lib", (char *) NULL);
572 python_libdir = relocate_gdb_directory (tmp, PYTHON_PATH_RELOCATABLE);
578 add_substitute_path_rule (RELOC_SRCDIR,
579 make_relative_prefix (gdb_program_name, BINDIR,
583 /* There will always be an interpreter. Either the one passed into
584 this captured main, or one specified by the user at start up, or
585 the console. Initialize the interpreter to the one requested by
587 interpreter_p = xstrdup (context->interpreter_p);
589 /* Parse arguments and options. */
592 /* When var field is 0, use flag field to record the equivalent
593 short option (or arbitrary numbers starting at 10 for those
594 with no equivalent). */
606 static struct option long_options[] =
608 {"tui", no_argument, 0, OPT_TUI},
609 {"dbx", no_argument, &dbx_commands, 1},
610 {"readnow", no_argument, &readnow_symbol_files, 1},
611 {"r", no_argument, &readnow_symbol_files, 1},
612 {"quiet", no_argument, &quiet, 1},
613 {"q", no_argument, &quiet, 1},
614 {"silent", no_argument, &quiet, 1},
615 {"nh", no_argument, &inhibit_home_gdbinit, 1},
616 {"nx", no_argument, &inhibit_gdbinit, 1},
617 {"n", no_argument, &inhibit_gdbinit, 1},
618 {"batch-silent", no_argument, 0, 'B'},
619 {"batch", no_argument, &batch_flag, 1},
621 /* This is a synonym for "--annotate=1". --annotate is now
622 preferred, but keep this here for a long time because people
623 will be running emacses which use --fullname. */
624 {"fullname", no_argument, 0, 'f'},
625 {"f", no_argument, 0, 'f'},
627 {"annotate", required_argument, 0, OPT_ANNOTATE},
628 {"help", no_argument, &print_help, 1},
629 {"se", required_argument, 0, OPT_SE},
630 {"symbols", required_argument, 0, 's'},
631 {"s", required_argument, 0, 's'},
632 {"exec", required_argument, 0, 'e'},
633 {"e", required_argument, 0, 'e'},
634 {"core", required_argument, 0, 'c'},
635 {"c", required_argument, 0, 'c'},
636 {"pid", required_argument, 0, 'p'},
637 {"p", required_argument, 0, 'p'},
638 {"command", required_argument, 0, 'x'},
639 {"eval-command", required_argument, 0, 'X'},
640 {"version", no_argument, &print_version, 1},
641 {"configuration", no_argument, &print_configuration, 1},
642 {"x", required_argument, 0, 'x'},
643 {"ex", required_argument, 0, 'X'},
644 {"init-command", required_argument, 0, OPT_IX},
645 {"init-eval-command", required_argument, 0, OPT_IEX},
646 {"ix", required_argument, 0, OPT_IX},
647 {"iex", required_argument, 0, OPT_IEX},
649 {"tclcommand", required_argument, 0, 'z'},
650 {"enable-external-editor", no_argument, 0, 'y'},
651 {"editor-command", required_argument, 0, 'w'},
653 {"ui", required_argument, 0, 'i'},
654 {"interpreter", required_argument, 0, 'i'},
655 {"i", required_argument, 0, 'i'},
656 {"directory", required_argument, 0, 'd'},
657 {"d", required_argument, 0, 'd'},
658 {"data-directory", required_argument, 0, 'D'},
659 {"D", required_argument, 0, 'D'},
660 {"cd", required_argument, 0, OPT_CD},
661 {"tty", required_argument, 0, 't'},
662 {"baud", required_argument, 0, 'b'},
663 {"b", required_argument, 0, 'b'},
664 {"nw", no_argument, NULL, OPT_NOWINDOWS},
665 {"nowindows", no_argument, NULL, OPT_NOWINDOWS},
666 {"w", no_argument, NULL, OPT_WINDOWS},
667 {"windows", no_argument, NULL, OPT_WINDOWS},
668 {"statistics", no_argument, 0, OPT_STATISTICS},
669 {"write", no_argument, &write_files, 1},
670 {"args", no_argument, &set_args, 1},
671 {"l", required_argument, 0, 'l'},
672 {"return-child-result", no_argument, &return_child_result, 1},
673 {0, no_argument, 0, 0}
680 c = getopt_long_only (argc, argv, "",
681 long_options, &option_index);
682 if (c == EOF || set_args)
685 /* Long option that takes an argument. */
686 if (c == 0 && long_options[option_index].flag == 0)
687 c = long_options[option_index].val;
692 /* Long option that just sets a flag. */
702 /* FIXME: what if the syntax is wrong (e.g. not digits)? */
703 annotation_level = atoi (optarg);
706 /* Enable the display of both time and space usage. */
707 set_per_command_time (1);
708 set_per_command_space (1);
711 /* --tui is equivalent to -i=tui. */
713 xfree (interpreter_p);
714 interpreter_p = xstrdup (INTERP_TUI);
716 error (_("%s: TUI mode is not supported"), gdb_program_name);
720 /* FIXME: cagney/2003-03-01: Not sure if this option is
721 actually useful, and if it is, what it should do. */
723 /* --windows is equivalent to -i=insight. */
724 xfree (interpreter_p);
725 interpreter_p = xstrdup (INTERP_INSIGHT);
729 /* -nw is equivalent to -i=console. */
730 xfree (interpreter_p);
731 interpreter_p = xstrdup (INTERP_CONSOLE);
734 annotation_level = 1;
749 cmdarg_vec.emplace_back (CMDARG_FILE, optarg);
752 cmdarg_vec.emplace_back (CMDARG_COMMAND, optarg);
755 cmdarg_vec.emplace_back (CMDARG_INIT_FILE, optarg);
758 cmdarg_vec.emplace_back (CMDARG_INIT_COMMAND, optarg);
761 batch_flag = batch_silent = 1;
762 gdb_stdout = new null_file ();
765 if (optarg[0] == '\0')
766 error (_("%s: empty path for `--data-directory'"),
768 set_gdb_data_directory (optarg);
769 gdb_datadir_provided = 1;
774 extern int gdbtk_test (char *);
776 if (!gdbtk_test (optarg))
777 error (_("%s: unable to load tclcommand file \"%s\""),
778 gdb_program_name, optarg);
782 /* Backwards compatibility only. */
786 /* Set the external editor commands when gdb is farming out files
787 to be edited by another program. */
788 extern char *external_editor_command;
790 external_editor_command = xstrdup (optarg);
795 xfree (interpreter_p);
796 interpreter_p = xstrdup (optarg);
799 dirarg.push_back (optarg);
812 i = strtol (optarg, &p, 0);
813 if (i == 0 && p == optarg)
814 warning (_("could not set baud rate to `%s'."),
825 i = strtol (optarg, &p, 0);
826 if (i == 0 && p == optarg)
827 warning (_("could not set timeout limit to `%s'."),
835 error (_("Use `%s --help' for a complete list of options."),
844 /* Try to set up an alternate signal stack for SIGSEGV handlers. */
845 setup_alternate_signal_stack ();
847 /* Initialize all files. */
848 gdb_init (gdb_program_name);
850 /* Now that gdb_init has created the initial inferior, we're in
851 position to set args for that inferior. */
854 /* The remaining options are the command-line options for the
855 inferior. The first one is the sym/exec file, and the rest
858 error (_("%s: `--args' specified but no program specified"),
861 symarg = argv[optind];
862 execarg = argv[optind];
864 set_inferior_args_vector (argc - optind, &argv[optind]);
868 /* OK, that's all the options. */
870 /* The first argument, if specified, is the name of the
874 symarg = argv[optind];
875 execarg = argv[optind];
879 /* If the user hasn't already specified a PID or the name of a
880 core file, then a second optional argument is allowed. If
881 present, this argument should be interpreted as either a
882 PID or a core file, whichever works. */
883 if (pidarg == NULL && corearg == NULL && optind < argc)
885 pid_or_core_arg = argv[optind];
889 /* Any argument left on the command line is unexpected and
890 will be ignored. Inform the user. */
892 fprintf_unfiltered (gdb_stderr,
893 _("Excess command line "
894 "arguments ignored. (%s%s)\n"),
896 (optind == argc - 1) ? "" : " ...");
899 /* Lookup gdbinit files. Note that the gdbinit file name may be
900 overriden during file initialization, so get_init_files should be
901 called after gdb_init. */
902 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
904 /* Do these (and anything which might call wrap_here or *_filtered)
905 after initialize_all_files() but before the interpreter has been
906 installed. Otherwize the help/version messages will be eaten by
907 the interpreter's output handler. */
911 print_gdb_version (gdb_stdout);
913 printf_filtered ("\n");
919 print_gdb_help (gdb_stdout);
920 fputs_unfiltered ("\n", gdb_stdout);
924 if (print_configuration)
926 print_gdb_configuration (gdb_stdout);
928 printf_filtered ("\n");
932 /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
933 GDB retain the old MI1 interpreter startup behavior. Output the
934 copyright message before the interpreter is installed. That way
935 it isn't encapsulated in MI output. */
936 if (!quiet && strcmp (interpreter_p, INTERP_MI1) == 0)
938 /* Print all the junk at the top, with trailing "..." if we are
939 about to read a symbol file (possibly slowly). */
940 print_gdb_version (gdb_stdout);
942 printf_filtered ("..");
944 printf_filtered ("\n");
945 gdb_flush (gdb_stdout); /* Force to screen during slow
949 /* Install the default UI. All the interpreters should have had a
950 look at things by now. Initialize the default interpreter. */
951 set_top_level_interpreter (interpreter_p);
953 /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets
954 GDB retain the old MI1 interpreter startup behavior. Output the
955 copyright message after the interpreter is installed when it is
956 any sane interpreter. */
957 if (!quiet && !current_interp_named_p (INTERP_MI1))
959 /* Print all the junk at the top, with trailing "..." if we are
960 about to read a symbol file (possibly slowly). */
961 print_gdb_version (gdb_stdout);
963 printf_filtered ("..");
965 printf_filtered ("\n");
966 gdb_flush (gdb_stdout); /* Force to screen during slow
970 /* Set off error and warning messages with a blank line. */
971 tmp_warn_preprint.reset ();
972 warning_pre_print = _("\nwarning: ");
974 /* Read and execute the system-wide gdbinit file, if it exists.
975 This is done *before* all the command line arguments are
976 processed; it sets global parameters, which are independent of
977 what file you are debugging or what directory you are in. */
978 if (system_gdbinit && !inhibit_gdbinit)
979 catch_command_errors (source_script, system_gdbinit, 0);
981 /* Read and execute $HOME/.gdbinit file, if it exists. This is done
982 *before* all the command line arguments are processed; it sets
983 global parameters, which are independent of what file you are
984 debugging or what directory you are in. */
986 if (home_gdbinit && !inhibit_gdbinit && !inhibit_home_gdbinit)
987 catch_command_errors (source_script, home_gdbinit, 0);
989 /* Process '-ix' and '-iex' options early. */
990 for (i = 0; i < cmdarg_vec.size (); i++)
992 const struct cmdarg &cmdarg_p = cmdarg_vec[i];
994 switch (cmdarg_p.type)
996 case CMDARG_INIT_FILE:
997 catch_command_errors (source_script, cmdarg_p.string,
1000 case CMDARG_INIT_COMMAND:
1001 catch_command_errors (execute_command, cmdarg_p.string,
1007 /* Now perform all the actions indicated by the arguments. */
1010 catch_command_errors (cd_command, cdarg, 0);
1013 for (i = 0; i < dirarg.size (); i++)
1014 catch_command_errors (directory_switch, dirarg[i], 0);
1016 /* Skip auto-loading section-specified scripts until we've sourced
1017 local_gdbinit (which is often used to augment the source search
1019 save_auto_load = global_auto_load;
1020 global_auto_load = 0;
1024 && strcmp (execarg, symarg) == 0)
1026 /* The exec file and the symbol-file are the same. If we can't
1027 open it, better only print one error message.
1028 catch_command_errors returns non-zero on success! */
1029 if (catch_command_errors (exec_file_attach, execarg,
1031 catch_command_errors (symbol_file_add_main_adapter, symarg,
1036 if (execarg != NULL)
1037 catch_command_errors (exec_file_attach, execarg,
1040 catch_command_errors (symbol_file_add_main_adapter, symarg,
1044 if (corearg && pidarg)
1045 error (_("Can't attach to process and specify "
1046 "a core file at the same time."));
1048 if (corearg != NULL)
1049 catch_command_errors (core_file_command, corearg, !batch_flag);
1050 else if (pidarg != NULL)
1051 catch_command_errors (attach_command, pidarg, !batch_flag);
1052 else if (pid_or_core_arg)
1054 /* The user specified 'gdb program pid' or gdb program core'.
1055 If pid_or_core_arg's first character is a digit, try attach
1056 first and then corefile. Otherwise try just corefile. */
1058 if (isdigit (pid_or_core_arg[0]))
1060 if (catch_command_errors (attach_command, pid_or_core_arg,
1062 catch_command_errors (core_file_command, pid_or_core_arg,
1065 else /* Can't be a pid, better be a corefile. */
1066 catch_command_errors (core_file_command, pid_or_core_arg,
1071 set_inferior_io_terminal (ttyarg);
1073 /* Error messages should no longer be distinguished with extra output. */
1074 warning_pre_print = _("warning: ");
1076 /* Read the .gdbinit file in the current directory, *if* it isn't
1077 the same as the $HOME/.gdbinit file (it should exist, also). */
1080 auto_load_local_gdbinit_pathname
1081 = gdb_realpath (local_gdbinit).release ();
1083 if (!inhibit_gdbinit && auto_load_local_gdbinit
1084 && file_is_auto_load_safe (local_gdbinit,
1085 _("auto-load: Loading .gdbinit "
1089 auto_load_local_gdbinit_loaded = 1;
1091 catch_command_errors (source_script, local_gdbinit, 0);
1095 /* Now that all .gdbinit's have been read and all -d options have been
1096 processed, we can read any scripts mentioned in SYMARG.
1097 We wait until now because it is common to add to the source search
1098 path in local_gdbinit. */
1099 global_auto_load = save_auto_load;
1100 ALL_OBJFILES (objfile)
1101 load_auto_scripts_for_objfile (objfile);
1103 /* Process '-x' and '-ex' options. */
1104 for (i = 0; i < cmdarg_vec.size (); i++)
1106 const struct cmdarg &cmdarg_p = cmdarg_vec[i];
1108 switch (cmdarg_p.type)
1111 catch_command_errors (source_script, cmdarg_p.string,
1114 case CMDARG_COMMAND:
1115 catch_command_errors (execute_command, cmdarg_p.string,
1121 /* Read in the old history after all the command files have been
1127 /* We have hit the end of the batch file. */
1128 quit_force (NULL, 0);
1133 captured_main (void *data)
1135 struct captured_main_args *context = (struct captured_main_args *) data;
1137 captured_main_1 (context);
1139 /* NOTE: cagney/1999-11-07: There is probably no reason for not
1140 moving this loop and the code found in captured_command_loop()
1141 into the command_loop() proper. The main thing holding back that
1142 change - SET_TOP_LEVEL() - has been eliminated. */
1147 captured_command_loop ();
1149 CATCH (ex, RETURN_MASK_ALL)
1151 exception_print (gdb_stderr, ex);
1155 /* No exit -- exit is through quit_command. */
1159 gdb_main (struct captured_main_args *args)
1163 captured_main (args);
1165 CATCH (ex, RETURN_MASK_ALL)
1167 exception_print (gdb_stderr, ex);
1171 /* The only way to end up here is by an error (normal exit is
1172 handled by quit_force()), hence always return an error status. */
1177 /* Don't use *_filtered for printing help. We don't want to prompt
1178 for continue no matter how small the screen or how much we're going
1182 print_gdb_help (struct ui_file *stream)
1184 const char *system_gdbinit;
1185 const char *home_gdbinit;
1186 const char *local_gdbinit;
1188 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
1190 /* Note: The options in the list below are only approximately sorted
1191 in the alphabetical order, so as to group closely related options
1193 fputs_unfiltered (_("\
1194 This is the GNU debugger. Usage:\n\n\
1195 gdb [options] [executable-file [core-file or process-id]]\n\
1196 gdb [options] --args executable-file [inferior-arguments ...]\n\n\
1198 fputs_unfiltered (_("\
1199 Selection of debuggee and its files:\n\n\
1200 --args Arguments after executable-file are passed to inferior\n\
1201 --core=COREFILE Analyze the core dump COREFILE.\n\
1202 --exec=EXECFILE Use EXECFILE as the executable.\n\
1203 --pid=PID Attach to running process PID.\n\
1204 --directory=DIR Search for source files in DIR.\n\
1205 --se=FILE Use FILE as symbol file and executable file.\n\
1206 --symbols=SYMFILE Read symbols from SYMFILE.\n\
1207 --readnow Fully read symbol files on first access.\n\
1208 --write Set writing into executable and core files.\n\n\
1210 fputs_unfiltered (_("\
1211 Initial commands and command files:\n\n\
1212 --command=FILE, -x Execute GDB commands from FILE.\n\
1213 --init-command=FILE, -ix\n\
1214 Like -x but execute commands before loading inferior.\n\
1215 --eval-command=COMMAND, -ex\n\
1216 Execute a single GDB command.\n\
1217 May be used multiple times and in conjunction\n\
1219 --init-eval-command=COMMAND, -iex\n\
1220 Like -ex but before loading inferior.\n\
1221 --nh Do not read ~/.gdbinit.\n\
1222 --nx Do not read any .gdbinit files in any directory.\n\n\
1224 fputs_unfiltered (_("\
1225 Output and user interface control:\n\n\
1226 --fullname Output information used by emacs-GDB interface.\n\
1227 --interpreter=INTERP\n\
1228 Select a specific interpreter / user interface\n\
1229 --tty=TTY Use TTY for input/output by the program being debugged.\n\
1230 -w Use the GUI interface.\n\
1231 --nw Do not use the GUI interface.\n\
1234 fputs_unfiltered (_("\
1235 --tui Use a terminal user interface.\n\
1238 fputs_unfiltered (_("\
1239 --dbx DBX compatibility mode.\n\
1240 -q, --quiet, --silent\n\
1241 Do not print version number on startup.\n\n\
1243 fputs_unfiltered (_("\
1244 Operating modes:\n\n\
1245 --batch Exit after processing options.\n\
1246 --batch-silent Like --batch, but suppress all gdb stdout output.\n\
1247 --return-child-result\n\
1248 GDB exit code will be the child's exit code.\n\
1249 --configuration Print details about GDB configuration and then exit.\n\
1250 --help Print this message and then exit.\n\
1251 --version Print version information and then exit.\n\n\
1252 Remote debugging options:\n\n\
1253 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
1254 -l TIMEOUT Set timeout in seconds for remote debugging.\n\n\
1256 --cd=DIR Change current directory to DIR.\n\
1257 --data-directory=DIR, -D\n\
1258 Set GDB's data-directory to DIR.\n\
1260 fputs_unfiltered (_("\n\
1261 At startup, GDB reads the following init files and executes their commands:\n\
1264 fprintf_unfiltered (stream, _("\
1265 * system-wide init file: %s\n\
1266 "), system_gdbinit);
1268 fprintf_unfiltered (stream, _("\
1269 * user-specific init file: %s\n\
1272 fprintf_unfiltered (stream, _("\
1273 * local init file (see also 'set auto-load local-gdbinit'): ./%s\n\
1275 fputs_unfiltered (_("\n\
1276 For more information, type \"help\" from within GDB, or consult the\n\
1277 GDB manual (available as on-line info or a printed manual).\n\
1279 if (REPORT_BUGS_TO[0] && stream == gdb_stdout)
1280 fprintf_unfiltered (stream, _("\
1281 Report bugs to \"%s\".\n\
1282 "), REPORT_BUGS_TO);