1 /* Top level stuff for GDB, the GNU debugger.
3 Copyright (C) 1986-2019 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 "common/filestuff.h"
45 #include "event-top.h"
47 #include "common/signals-state-save-restore.h"
49 #include "common/pathstuff.h"
50 #include "cli/cli-style.h"
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. */
57 /* Whether dbx commands will be handled. */
60 /* System root path, used to find libraries etc. */
61 char *gdb_sysroot = 0;
63 /* GDB datadir, used to store data files. */
64 char *gdb_datadir = 0;
66 /* Non-zero if GDB_DATADIR was provided on the command line.
67 This doesn't track whether data-directory is set later from the
68 command line, but we don't reread system.gdbinit when that happens. */
69 static int gdb_datadir_provided = 0;
71 /* If gdb was configured with --with-python=/path,
72 the possibly relocated path to python's lib directory. */
73 char *python_libdir = 0;
75 /* Target IO streams. */
76 struct ui_file *gdb_stdtargin;
77 struct ui_file *gdb_stdtarg;
78 struct ui_file *gdb_stdtargerr;
80 /* True if --batch or --batch-silent was seen. */
83 /* Support for the --batch-silent option. */
86 /* Support for --return-child-result option.
87 Set the default to -1 to return error in the case
88 that the program does not run or does not complete. */
89 int return_child_result = 0;
90 int return_child_result_value = -1;
93 /* GDB as it has been invoked from the command line (i.e. argv[0]). */
94 static char *gdb_program_name;
96 /* Return read only pointer to GDB_PROGRAM_NAME. */
98 get_gdb_program_name (void)
100 return gdb_program_name;
103 static void print_gdb_help (struct ui_file *);
105 /* Set the data-directory parameter to NEW_DATADIR.
106 If NEW_DATADIR is not a directory then a warning is printed.
107 We don't signal an error for backward compatibility. */
110 set_gdb_data_directory (const char *new_datadir)
114 if (stat (new_datadir, &st) < 0)
116 int save_errno = errno;
118 fprintf_unfiltered (gdb_stderr, "Warning: ");
119 print_sys_errmsg (new_datadir, save_errno);
121 else if (!S_ISDIR (st.st_mode))
122 warning (_("%s is not a directory."), new_datadir);
125 gdb_datadir = gdb_realpath (new_datadir).release ();
127 /* gdb_realpath won't return an absolute path if the path doesn't exist,
128 but we still want to record an absolute path here. If the user entered
129 "../foo" and "../foo" doesn't exist then we'll record $(pwd)/../foo which
130 isn't canonical, but that's ok. */
131 if (!IS_ABSOLUTE_PATH (gdb_datadir))
133 gdb::unique_xmalloc_ptr<char> abs_datadir = gdb_abspath (gdb_datadir);
136 gdb_datadir = abs_datadir.release ();
140 /* Relocate a file or directory. PROGNAME is the name by which gdb
141 was invoked (i.e., argv[0]). INITIAL is the default value for the
142 file or directory. FLAG is true if the value is relocatable, false
143 otherwise. Returns a newly allocated string; this may return NULL
144 under the same conditions as make_relative_prefix. */
147 relocate_path (const char *progname, const char *initial, int flag)
150 return make_relative_prefix (progname, BINDIR, initial);
151 return xstrdup (initial);
154 /* Like relocate_path, but specifically checks for a directory.
155 INITIAL is relocated according to the rules of relocate_path. If
156 the result is a directory, it is used; otherwise, INITIAL is used.
157 The chosen directory is then canonicalized using lrealpath. This
158 function always returns a newly-allocated string. */
161 relocate_gdb_directory (const char *initial, int flag)
165 dir = relocate_path (gdb_program_name, initial, flag);
170 if (*dir == '\0' || stat (dir, &s) != 0 || !S_ISDIR (s.st_mode))
177 dir = xstrdup (initial);
179 /* Canonicalize the directory. */
182 char *canon_sysroot = lrealpath (dir);
194 /* Compute the locations of init files that GDB should source and
195 return them in SYSTEM_GDBINIT, HOME_GDBINIT, LOCAL_GDBINIT. If
196 there is no system gdbinit (resp. home gdbinit and local gdbinit)
197 to be loaded, then SYSTEM_GDBINIT (resp. HOME_GDBINIT and
198 LOCAL_GDBINIT) is set to NULL. */
200 get_init_files (const char **system_gdbinit,
201 const char **home_gdbinit,
202 const char **local_gdbinit)
204 static const char *sysgdbinit = NULL;
205 static char *homeinit = NULL;
206 static const char *localinit = NULL;
207 static int initialized = 0;
211 struct stat homebuf, cwdbuf, s;
214 if (SYSTEM_GDBINIT[0])
216 int datadir_len = strlen (GDB_DATADIR);
217 int sys_gdbinit_len = strlen (SYSTEM_GDBINIT);
218 char *relocated_sysgdbinit;
220 /* If SYSTEM_GDBINIT lives in data-directory, and data-directory
221 has been provided, search for SYSTEM_GDBINIT there. */
222 if (gdb_datadir_provided
223 && datadir_len < sys_gdbinit_len
224 && filename_ncmp (SYSTEM_GDBINIT, GDB_DATADIR, datadir_len) == 0
225 && IS_DIR_SEPARATOR (SYSTEM_GDBINIT[datadir_len]))
227 /* Append the part of SYSTEM_GDBINIT that follows GDB_DATADIR
229 char *tmp_sys_gdbinit = xstrdup (&SYSTEM_GDBINIT[datadir_len]);
232 for (p = tmp_sys_gdbinit; IS_DIR_SEPARATOR (*p); ++p)
234 relocated_sysgdbinit = concat (gdb_datadir, SLASH_STRING, p,
236 xfree (tmp_sys_gdbinit);
240 relocated_sysgdbinit = relocate_path (gdb_program_name,
242 SYSTEM_GDBINIT_RELOCATABLE);
244 if (relocated_sysgdbinit && stat (relocated_sysgdbinit, &s) == 0)
245 sysgdbinit = relocated_sysgdbinit;
247 xfree (relocated_sysgdbinit);
250 homedir = getenv ("HOME");
252 /* If the .gdbinit file in the current directory is the same as
253 the $HOME/.gdbinit file, it should not be sourced. homebuf
254 and cwdbuf are used in that purpose. Make sure that the stats
255 are zero in case one of them fails (this guarantees that they
256 won't match if either exists). */
258 memset (&homebuf, 0, sizeof (struct stat));
259 memset (&cwdbuf, 0, sizeof (struct stat));
263 homeinit = xstrprintf ("%s/%s", homedir, gdbinit);
264 if (stat (homeinit, &homebuf) != 0)
271 if (stat (gdbinit, &cwdbuf) == 0)
274 || memcmp ((char *) &homebuf, (char *) &cwdbuf,
275 sizeof (struct stat)))
282 *system_gdbinit = sysgdbinit;
283 *home_gdbinit = homeinit;
284 *local_gdbinit = localinit;
287 /* Try to set up an alternate signal stack for SIGSEGV handlers.
288 This allows us to handle SIGSEGV signals generated when the
289 normal process stack is exhausted. If this stack is not set
290 up (sigaltstack is unavailable or fails) and a SIGSEGV is
291 generated when the normal stack is exhausted then the program
292 will behave as though no SIGSEGV handler was installed. */
295 setup_alternate_signal_stack (void)
297 #ifdef HAVE_SIGALTSTACK
300 /* FreeBSD versions older than 11.0 use char * for ss_sp instead of
301 void *. This cast works with both types. */
302 ss.ss_sp = (char *) xmalloc (SIGSTKSZ);
303 ss.ss_size = SIGSTKSZ;
306 sigaltstack(&ss, NULL);
310 /* Call command_loop. */
312 /* Prevent inlining this function for the benefit of GDB's selftests
313 in the testsuite. Those tests want to run GDB under GDB and stop
315 static void captured_command_loop () __attribute__((noinline));
318 captured_command_loop ()
320 struct ui *ui = current_ui;
322 /* Top-level execution commands can be run in the background from
324 current_ui->async = 1;
326 /* Give the interpreter a chance to print a prompt, if necessary */
327 if (ui->prompt_state != PROMPT_BLOCKED)
328 interp_pre_command_loop (top_level_interpreter ());
330 /* Now it's time to start the event loop. */
333 /* If the command_loop returned, normally (rather than threw an
334 error) we try to quit. If the quit is aborted, our caller
335 catches the signal and restarts the command loop. */
336 quit_command (NULL, ui->instream == ui->stdin_stream);
339 /* Handle command errors thrown from within catch_command_errors. */
342 handle_command_errors (const struct gdb_exception &e)
346 exception_print (gdb_stderr, e);
348 /* If any exception escaped to here, we better enable stdin.
349 Otherwise, any command that calls async_disable_stdin, and
350 then throws, will leave stdin inoperable. */
351 async_enable_stdin ();
357 /* Type of the command callback passed to the const
358 catch_command_errors. */
360 typedef void (catch_command_errors_const_ftype) (const char *, int);
362 /* Wrap calls to commands run before the event loop is started. */
365 catch_command_errors (catch_command_errors_const_ftype command,
366 const 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 (const gdb_exception &e)
378 return handle_command_errors (e);
384 /* Adapter for symbol_file_add_main that translates 'from_tty' to a
385 symfile_add_flags. */
388 symbol_file_add_main_adapter (const char *arg, int from_tty)
390 symfile_add_flags add_flags = 0;
393 add_flags |= SYMFILE_VERBOSE;
395 symbol_file_add_main (arg, add_flags);
398 /* Perform validation of the '--readnow' and '--readnever' flags. */
401 validate_readnow_readnever ()
403 if (readnever_symbol_files && readnow_symbol_files)
405 error (_("%s: '--readnow' and '--readnever' cannot be "
406 "specified simultaneously"),
411 /* Type of this option. */
414 /* Option type -x. */
417 /* Option type -ex. */
420 /* Option type -ix. */
423 /* Option type -iex. */
427 /* Arguments of --command option and its counterpart. */
430 cmdarg (cmdarg_kind type_, char *string_)
431 : type (type_), string (string_)
434 /* Type of this option. */
435 enum cmdarg_kind type;
437 /* Value of this option - filename or the GDB command itself. String memory
438 is not owned by this structure despite it is 'const'. */
443 captured_main_1 (struct captured_main_args *context)
445 int argc = context->argc;
446 char **argv = context->argv;
448 static int quiet = 0;
449 static int set_args = 0;
450 static int inhibit_home_gdbinit = 0;
452 /* Pointers to various arguments from command line. */
454 char *execarg = NULL;
456 char *corearg = NULL;
457 char *pid_or_core_arg = NULL;
461 /* These are static so that we can take their address in an
463 static int print_help;
464 static int print_version;
465 static int print_configuration;
467 /* Pointers to all arguments of --command option. */
468 std::vector<struct cmdarg> cmdarg_vec;
470 /* All arguments of --directory option. */
471 std::vector<char *> dirarg;
473 /* gdb init files. */
474 const char *system_gdbinit;
475 const char *home_gdbinit;
476 const char *local_gdbinit;
482 #ifdef HAVE_USEFUL_SBRK
483 /* Set this before constructing scoped_command_stats. */
484 lim_at_start = (char *) sbrk (0);
487 scoped_command_stats stat_reporter (false);
489 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
490 setlocale (LC_MESSAGES, "");
492 #if defined (HAVE_SETLOCALE)
493 setlocale (LC_CTYPE, "");
496 bindtextdomain (PACKAGE, LOCALEDIR);
497 textdomain (PACKAGE);
502 saved_command_line = (char *) xstrdup ("");
505 /* Ensure stderr is unbuffered. A Cygwin pty or pipe is implemented
506 as a Windows pipe, and Windows buffers on pipes. */
507 setvbuf (stderr, NULL, _IONBF, BUFSIZ);
510 /* Note: `error' cannot be called before this point, because the
511 caller will crash when trying to print the exception. */
512 main_ui = new ui (stdin, stdout, stderr);
513 current_ui = main_ui;
515 gdb_stdtargerr = gdb_stderr; /* for moment */
516 gdb_stdtargin = gdb_stdin; /* for moment */
518 if (bfd_init () != BFD_INIT_MAGIC)
519 error (_("fatal error: libbfd ABI mismatch"));
522 /* On Windows, argv[0] is not necessarily set to absolute form when
523 GDB is found along PATH, without which relocation doesn't work. */
524 gdb_program_name = windows_get_absolute_argv0 (argv[0]);
526 gdb_program_name = xstrdup (argv[0]);
529 /* Prefix warning messages with the command name. */
530 gdb::unique_xmalloc_ptr<char> tmp_warn_preprint
531 (xstrprintf ("%s: warning: ", gdb_program_name));
532 warning_pre_print = tmp_warn_preprint.get ();
534 current_directory = getcwd (NULL, 0);
535 if (current_directory == NULL)
536 perror_warning_with_name (_("error finding working directory"));
538 /* Set the sysroot path. */
539 gdb_sysroot = relocate_gdb_directory (TARGET_SYSTEM_ROOT,
540 TARGET_SYSTEM_ROOT_RELOCATABLE);
542 if (gdb_sysroot == NULL || *gdb_sysroot == '\0')
545 gdb_sysroot = xstrdup (TARGET_SYSROOT_PREFIX);
548 debug_file_directory = relocate_gdb_directory (DEBUGDIR,
549 DEBUGDIR_RELOCATABLE);
551 gdb_datadir = relocate_gdb_directory (GDB_DATADIR,
552 GDB_DATADIR_RELOCATABLE);
554 #ifdef WITH_PYTHON_PATH
556 /* For later use in helping Python find itself. */
557 char *tmp = concat (WITH_PYTHON_PATH, SLASH_STRING, "lib", (char *) NULL);
559 python_libdir = relocate_gdb_directory (tmp, PYTHON_PATH_RELOCATABLE);
565 add_substitute_path_rule (RELOC_SRCDIR,
566 make_relative_prefix (gdb_program_name, BINDIR,
570 /* There will always be an interpreter. Either the one passed into
571 this captured main, or one specified by the user at start up, or
572 the console. Initialize the interpreter to the one requested by
574 interpreter_p = xstrdup (context->interpreter_p);
576 /* Parse arguments and options. */
579 /* When var field is 0, use flag field to record the equivalent
580 short option (or arbitrary numbers starting at 10 for those
581 with no equivalent). */
595 static struct option long_options[] =
597 {"tui", no_argument, 0, OPT_TUI},
598 {"dbx", no_argument, &dbx_commands, 1},
599 {"readnow", no_argument, NULL, OPT_READNOW},
600 {"readnever", no_argument, NULL, OPT_READNEVER},
601 {"r", no_argument, NULL, OPT_READNOW},
602 {"quiet", no_argument, &quiet, 1},
603 {"q", no_argument, &quiet, 1},
604 {"silent", no_argument, &quiet, 1},
605 {"nh", no_argument, &inhibit_home_gdbinit, 1},
606 {"nx", no_argument, &inhibit_gdbinit, 1},
607 {"n", no_argument, &inhibit_gdbinit, 1},
608 {"batch-silent", no_argument, 0, 'B'},
609 {"batch", no_argument, &batch_flag, 1},
611 /* This is a synonym for "--annotate=1". --annotate is now
612 preferred, but keep this here for a long time because people
613 will be running emacses which use --fullname. */
614 {"fullname", no_argument, 0, 'f'},
615 {"f", no_argument, 0, 'f'},
617 {"annotate", required_argument, 0, OPT_ANNOTATE},
618 {"help", no_argument, &print_help, 1},
619 {"se", required_argument, 0, OPT_SE},
620 {"symbols", required_argument, 0, 's'},
621 {"s", required_argument, 0, 's'},
622 {"exec", required_argument, 0, 'e'},
623 {"e", required_argument, 0, 'e'},
624 {"core", required_argument, 0, 'c'},
625 {"c", required_argument, 0, 'c'},
626 {"pid", required_argument, 0, 'p'},
627 {"p", required_argument, 0, 'p'},
628 {"command", required_argument, 0, 'x'},
629 {"eval-command", required_argument, 0, 'X'},
630 {"version", no_argument, &print_version, 1},
631 {"configuration", no_argument, &print_configuration, 1},
632 {"x", required_argument, 0, 'x'},
633 {"ex", required_argument, 0, 'X'},
634 {"init-command", required_argument, 0, OPT_IX},
635 {"init-eval-command", required_argument, 0, OPT_IEX},
636 {"ix", required_argument, 0, OPT_IX},
637 {"iex", required_argument, 0, OPT_IEX},
639 {"tclcommand", required_argument, 0, 'z'},
640 {"enable-external-editor", no_argument, 0, 'y'},
641 {"editor-command", required_argument, 0, 'w'},
643 {"ui", required_argument, 0, 'i'},
644 {"interpreter", required_argument, 0, 'i'},
645 {"i", required_argument, 0, 'i'},
646 {"directory", required_argument, 0, 'd'},
647 {"d", required_argument, 0, 'd'},
648 {"data-directory", required_argument, 0, 'D'},
649 {"D", required_argument, 0, 'D'},
650 {"cd", required_argument, 0, OPT_CD},
651 {"tty", required_argument, 0, 't'},
652 {"baud", required_argument, 0, 'b'},
653 {"b", required_argument, 0, 'b'},
654 {"nw", no_argument, NULL, OPT_NOWINDOWS},
655 {"nowindows", no_argument, NULL, OPT_NOWINDOWS},
656 {"w", no_argument, NULL, OPT_WINDOWS},
657 {"windows", no_argument, NULL, OPT_WINDOWS},
658 {"statistics", no_argument, 0, OPT_STATISTICS},
659 {"write", no_argument, &write_files, 1},
660 {"args", no_argument, &set_args, 1},
661 {"l", required_argument, 0, 'l'},
662 {"return-child-result", no_argument, &return_child_result, 1},
663 {0, no_argument, 0, 0}
670 c = getopt_long_only (argc, argv, "",
671 long_options, &option_index);
672 if (c == EOF || set_args)
675 /* Long option that takes an argument. */
676 if (c == 0 && long_options[option_index].flag == 0)
677 c = long_options[option_index].val;
682 /* Long option that just sets a flag. */
692 /* FIXME: what if the syntax is wrong (e.g. not digits)? */
693 annotation_level = atoi (optarg);
696 /* Enable the display of both time and space usage. */
697 set_per_command_time (1);
698 set_per_command_space (1);
701 /* --tui is equivalent to -i=tui. */
703 xfree (interpreter_p);
704 interpreter_p = xstrdup (INTERP_TUI);
706 error (_("%s: TUI mode is not supported"), gdb_program_name);
710 /* FIXME: cagney/2003-03-01: Not sure if this option is
711 actually useful, and if it is, what it should do. */
713 /* --windows is equivalent to -i=insight. */
714 xfree (interpreter_p);
715 interpreter_p = xstrdup (INTERP_INSIGHT);
719 /* -nw is equivalent to -i=console. */
720 xfree (interpreter_p);
721 interpreter_p = xstrdup (INTERP_CONSOLE);
724 annotation_level = 1;
739 cmdarg_vec.emplace_back (CMDARG_FILE, optarg);
742 cmdarg_vec.emplace_back (CMDARG_COMMAND, optarg);
745 cmdarg_vec.emplace_back (CMDARG_INIT_FILE, optarg);
748 cmdarg_vec.emplace_back (CMDARG_INIT_COMMAND, optarg);
751 batch_flag = batch_silent = 1;
752 gdb_stdout = new null_file ();
755 if (optarg[0] == '\0')
756 error (_("%s: empty path for `--data-directory'"),
758 set_gdb_data_directory (optarg);
759 gdb_datadir_provided = 1;
764 extern int gdbtk_test (char *);
766 if (!gdbtk_test (optarg))
767 error (_("%s: unable to load tclcommand file \"%s\""),
768 gdb_program_name, optarg);
772 /* Backwards compatibility only. */
776 /* Set the external editor commands when gdb is farming out files
777 to be edited by another program. */
778 extern char *external_editor_command;
780 external_editor_command = xstrdup (optarg);
785 xfree (interpreter_p);
786 interpreter_p = xstrdup (optarg);
789 dirarg.push_back (optarg);
802 rate = strtol (optarg, &p, 0);
803 if (rate == 0 && p == optarg)
804 warning (_("could not set baud rate to `%s'."),
815 timeout = strtol (optarg, &p, 0);
816 if (timeout == 0 && p == optarg)
817 warning (_("could not set timeout limit to `%s'."),
820 remote_timeout = timeout;
826 readnow_symbol_files = 1;
827 validate_readnow_readnever ();
833 readnever_symbol_files = 1;
834 validate_readnow_readnever ();
839 error (_("Use `%s --help' for a complete list of options."),
848 /* Disable all output styling when running in batch mode. */
853 save_original_signals_state (quiet);
855 /* Try to set up an alternate signal stack for SIGSEGV handlers. */
856 setup_alternate_signal_stack ();
858 /* Initialize all files. */
859 gdb_init (gdb_program_name);
861 /* Now that gdb_init has created the initial inferior, we're in
862 position to set args for that inferior. */
865 /* The remaining options are the command-line options for the
866 inferior. The first one is the sym/exec file, and the rest
869 error (_("%s: `--args' specified but no program specified"),
872 symarg = argv[optind];
873 execarg = argv[optind];
875 set_inferior_args_vector (argc - optind, &argv[optind]);
879 /* OK, that's all the options. */
881 /* The first argument, if specified, is the name of the
885 symarg = argv[optind];
886 execarg = argv[optind];
890 /* If the user hasn't already specified a PID or the name of a
891 core file, then a second optional argument is allowed. If
892 present, this argument should be interpreted as either a
893 PID or a core file, whichever works. */
894 if (pidarg == NULL && corearg == NULL && optind < argc)
896 pid_or_core_arg = argv[optind];
900 /* Any argument left on the command line is unexpected and
901 will be ignored. Inform the user. */
903 fprintf_unfiltered (gdb_stderr,
904 _("Excess command line "
905 "arguments ignored. (%s%s)\n"),
907 (optind == argc - 1) ? "" : " ...");
910 /* Lookup gdbinit files. Note that the gdbinit file name may be
911 overriden during file initialization, so get_init_files should be
912 called after gdb_init. */
913 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
915 /* Do these (and anything which might call wrap_here or *_filtered)
916 after initialize_all_files() but before the interpreter has been
917 installed. Otherwize the help/version messages will be eaten by
918 the interpreter's output handler. */
922 print_gdb_version (gdb_stdout, false);
924 printf_filtered ("\n");
930 print_gdb_help (gdb_stdout);
931 fputs_unfiltered ("\n", gdb_stdout);
935 if (print_configuration)
937 print_gdb_configuration (gdb_stdout);
939 printf_filtered ("\n");
943 /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
944 GDB retain the old MI1 interpreter startup behavior. Output the
945 copyright message before the interpreter is installed. That way
946 it isn't encapsulated in MI output. */
947 if (!quiet && strcmp (interpreter_p, INTERP_MI1) == 0)
949 /* Print all the junk at the top, with trailing "..." if we are
950 about to read a symbol file (possibly slowly). */
951 print_gdb_version (gdb_stdout, true);
953 printf_filtered ("..");
955 printf_filtered ("\n");
956 gdb_flush (gdb_stdout); /* Force to screen during slow
960 /* Install the default UI. All the interpreters should have had a
961 look at things by now. Initialize the default interpreter. */
962 set_top_level_interpreter (interpreter_p);
964 /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets
965 GDB retain the old MI1 interpreter startup behavior. Output the
966 copyright message after the interpreter is installed when it is
967 any sane interpreter. */
968 if (!quiet && !current_interp_named_p (INTERP_MI1))
970 /* Print all the junk at the top, with trailing "..." if we are
971 about to read a symbol file (possibly slowly). */
972 print_gdb_version (gdb_stdout, true);
974 printf_filtered ("..");
976 printf_filtered ("\n");
977 gdb_flush (gdb_stdout); /* Force to screen during slow
981 /* Set off error and warning messages with a blank line. */
982 tmp_warn_preprint.reset ();
983 warning_pre_print = _("\nwarning: ");
985 /* Read and execute the system-wide gdbinit file, if it exists.
986 This is done *before* all the command line arguments are
987 processed; it sets global parameters, which are independent of
988 what file you are debugging or what directory you are in. */
989 if (system_gdbinit && !inhibit_gdbinit)
990 ret = catch_command_errors (source_script, system_gdbinit, 0);
992 /* Read and execute $HOME/.gdbinit file, if it exists. This is done
993 *before* all the command line arguments are processed; it sets
994 global parameters, which are independent of what file you are
995 debugging or what directory you are in. */
997 if (home_gdbinit && !inhibit_gdbinit && !inhibit_home_gdbinit)
998 ret = catch_command_errors (source_script, home_gdbinit, 0);
1000 /* Process '-ix' and '-iex' options early. */
1001 for (i = 0; i < cmdarg_vec.size (); i++)
1003 const struct cmdarg &cmdarg_p = cmdarg_vec[i];
1005 switch (cmdarg_p.type)
1007 case CMDARG_INIT_FILE:
1008 ret = catch_command_errors (source_script, cmdarg_p.string,
1011 case CMDARG_INIT_COMMAND:
1012 ret = catch_command_errors (execute_command, cmdarg_p.string,
1018 /* Now perform all the actions indicated by the arguments. */
1021 ret = catch_command_errors (cd_command, cdarg, 0);
1024 for (i = 0; i < dirarg.size (); i++)
1025 ret = catch_command_errors (directory_switch, dirarg[i], 0);
1027 /* Skip auto-loading section-specified scripts until we've sourced
1028 local_gdbinit (which is often used to augment the source search
1030 save_auto_load = global_auto_load;
1031 global_auto_load = 0;
1035 && strcmp (execarg, symarg) == 0)
1037 /* The exec file and the symbol-file are the same. If we can't
1038 open it, better only print one error message.
1039 catch_command_errors returns non-zero on success! */
1040 ret = catch_command_errors (exec_file_attach, execarg,
1043 ret = catch_command_errors (symbol_file_add_main_adapter,
1044 symarg, !batch_flag);
1048 if (execarg != NULL)
1049 ret = catch_command_errors (exec_file_attach, execarg,
1052 ret = catch_command_errors (symbol_file_add_main_adapter,
1053 symarg, !batch_flag);
1056 if (corearg && pidarg)
1057 error (_("Can't attach to process and specify "
1058 "a core file at the same time."));
1060 if (corearg != NULL)
1062 ret = catch_command_errors (core_file_command, corearg,
1065 else if (pidarg != NULL)
1067 ret = catch_command_errors (attach_command, pidarg, !batch_flag);
1069 else if (pid_or_core_arg)
1071 /* The user specified 'gdb program pid' or gdb program core'.
1072 If pid_or_core_arg's first character is a digit, try attach
1073 first and then corefile. Otherwise try just corefile. */
1075 if (isdigit (pid_or_core_arg[0]))
1077 ret = catch_command_errors (attach_command, pid_or_core_arg,
1080 ret = catch_command_errors (core_file_command,
1086 /* Can't be a pid, better be a corefile. */
1087 ret = catch_command_errors (core_file_command,
1094 set_inferior_io_terminal (ttyarg);
1096 /* Error messages should no longer be distinguished with extra output. */
1097 warning_pre_print = _("warning: ");
1099 /* Read the .gdbinit file in the current directory, *if* it isn't
1100 the same as the $HOME/.gdbinit file (it should exist, also). */
1103 auto_load_local_gdbinit_pathname
1104 = gdb_realpath (local_gdbinit).release ();
1106 if (!inhibit_gdbinit && auto_load_local_gdbinit
1107 && file_is_auto_load_safe (local_gdbinit,
1108 _("auto-load: Loading .gdbinit "
1112 auto_load_local_gdbinit_loaded = 1;
1114 ret = catch_command_errors (source_script, local_gdbinit, 0);
1118 /* Now that all .gdbinit's have been read and all -d options have been
1119 processed, we can read any scripts mentioned in SYMARG.
1120 We wait until now because it is common to add to the source search
1121 path in local_gdbinit. */
1122 global_auto_load = save_auto_load;
1123 for (objfile *objfile : current_program_space->objfiles ())
1124 load_auto_scripts_for_objfile (objfile);
1126 /* Process '-x' and '-ex' options. */
1127 for (i = 0; i < cmdarg_vec.size (); i++)
1129 const struct cmdarg &cmdarg_p = cmdarg_vec[i];
1131 switch (cmdarg_p.type)
1134 ret = catch_command_errors (source_script, cmdarg_p.string,
1137 case CMDARG_COMMAND:
1138 ret = catch_command_errors (execute_command, cmdarg_p.string,
1144 /* Read in the old history after all the command files have been
1150 int error_status = EXIT_FAILURE;
1151 int *exit_arg = ret == 0 ? &error_status : NULL;
1153 /* We have hit the end of the batch file. */
1154 quit_force (exit_arg, 0);
1159 captured_main (void *data)
1161 struct captured_main_args *context = (struct captured_main_args *) data;
1163 captured_main_1 (context);
1165 /* NOTE: cagney/1999-11-07: There is probably no reason for not
1166 moving this loop and the code found in captured_command_loop()
1167 into the command_loop() proper. The main thing holding back that
1168 change - SET_TOP_LEVEL() - has been eliminated. */
1173 captured_command_loop ();
1175 catch (const gdb_exception &ex)
1177 exception_print (gdb_stderr, ex);
1180 /* No exit -- exit is through quit_command. */
1184 gdb_main (struct captured_main_args *args)
1188 captured_main (args);
1190 catch (const gdb_exception &ex)
1192 exception_print (gdb_stderr, ex);
1195 /* The only way to end up here is by an error (normal exit is
1196 handled by quit_force()), hence always return an error status. */
1201 /* Don't use *_filtered for printing help. We don't want to prompt
1202 for continue no matter how small the screen or how much we're going
1206 print_gdb_help (struct ui_file *stream)
1208 const char *system_gdbinit;
1209 const char *home_gdbinit;
1210 const char *local_gdbinit;
1212 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
1214 /* Note: The options in the list below are only approximately sorted
1215 in the alphabetical order, so as to group closely related options
1217 fputs_unfiltered (_("\
1218 This is the GNU debugger. Usage:\n\n\
1219 gdb [options] [executable-file [core-file or process-id]]\n\
1220 gdb [options] --args executable-file [inferior-arguments ...]\n\n\
1222 fputs_unfiltered (_("\
1223 Selection of debuggee and its files:\n\n\
1224 --args Arguments after executable-file are passed to inferior\n\
1225 --core=COREFILE Analyze the core dump COREFILE.\n\
1226 --exec=EXECFILE Use EXECFILE as the executable.\n\
1227 --pid=PID Attach to running process PID.\n\
1228 --directory=DIR Search for source files in DIR.\n\
1229 --se=FILE Use FILE as symbol file and executable file.\n\
1230 --symbols=SYMFILE Read symbols from SYMFILE.\n\
1231 --readnow Fully read symbol files on first access.\n\
1232 --readnever Do not read symbol files.\n\
1233 --write Set writing into executable and core files.\n\n\
1235 fputs_unfiltered (_("\
1236 Initial commands and command files:\n\n\
1237 --command=FILE, -x Execute GDB commands from FILE.\n\
1238 --init-command=FILE, -ix\n\
1239 Like -x but execute commands before loading inferior.\n\
1240 --eval-command=COMMAND, -ex\n\
1241 Execute a single GDB command.\n\
1242 May be used multiple times and in conjunction\n\
1244 --init-eval-command=COMMAND, -iex\n\
1245 Like -ex but before loading inferior.\n\
1246 --nh Do not read ~/.gdbinit.\n\
1247 --nx Do not read any .gdbinit files in any directory.\n\n\
1249 fputs_unfiltered (_("\
1250 Output and user interface control:\n\n\
1251 --fullname Output information used by emacs-GDB interface.\n\
1252 --interpreter=INTERP\n\
1253 Select a specific interpreter / user interface\n\
1254 --tty=TTY Use TTY for input/output by the program being debugged.\n\
1255 -w Use the GUI interface.\n\
1256 --nw Do not use the GUI interface.\n\
1259 fputs_unfiltered (_("\
1260 --tui Use a terminal user interface.\n\
1263 fputs_unfiltered (_("\
1264 --dbx DBX compatibility mode.\n\
1265 -q, --quiet, --silent\n\
1266 Do not print version number on startup.\n\n\
1268 fputs_unfiltered (_("\
1269 Operating modes:\n\n\
1270 --batch Exit after processing options.\n\
1271 --batch-silent Like --batch, but suppress all gdb stdout output.\n\
1272 --return-child-result\n\
1273 GDB exit code will be the child's exit code.\n\
1274 --configuration Print details about GDB configuration and then exit.\n\
1275 --help Print this message and then exit.\n\
1276 --version Print version information and then exit.\n\n\
1277 Remote debugging options:\n\n\
1278 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
1279 -l TIMEOUT Set timeout in seconds for remote debugging.\n\n\
1281 --cd=DIR Change current directory to DIR.\n\
1282 --data-directory=DIR, -D\n\
1283 Set GDB's data-directory to DIR.\n\
1285 fputs_unfiltered (_("\n\
1286 At startup, GDB reads the following init files and executes their commands:\n\
1289 fprintf_unfiltered (stream, _("\
1290 * system-wide init file: %s\n\
1291 "), system_gdbinit);
1293 fprintf_unfiltered (stream, _("\
1294 * user-specific init file: %s\n\
1297 fprintf_unfiltered (stream, _("\
1298 * local init file (see also 'set auto-load local-gdbinit'): ./%s\n\
1300 fputs_unfiltered (_("\n\
1301 For more information, type \"help\" from within GDB, or consult the\n\
1302 GDB manual (available as on-line info or a printed manual).\n\
1304 if (REPORT_BUGS_TO[0] && stream == gdb_stdout)
1305 fprintf_unfiltered (stream, _("\
1306 Report bugs to \"%s\".\n\
1307 "), REPORT_BUGS_TO);