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. */
310 /* Prevent inlining this function for the benefit of GDB's selftests
311 in the testsuite. Those tests want to run GDB under GDB and stop
313 static void captured_command_loop () __attribute__((noinline));
316 captured_command_loop ()
318 struct ui *ui = current_ui;
320 /* Top-level execution commands can be run in the background from
322 current_ui->async = 1;
324 /* Give the interpreter a chance to print a prompt, if necessary */
325 if (ui->prompt_state != PROMPT_BLOCKED)
326 interp_pre_command_loop (top_level_interpreter ());
328 /* Now it's time to start the event loop. */
331 /* FIXME: cagney/1999-11-05: A correct command_loop() implementaton
332 would clean things up (restoring the cleanup chain) to the state
333 they were just prior to the call. Technically, this means that
334 the do_cleanups() below is redundant. Unfortunately, many FUNCs
335 are not that well behaved. do_cleanups should either be replaced
336 with a do_cleanups call (to cover the problem) or an assertion
337 check to detect bad FUNCs code. */
338 do_cleanups (all_cleanups ());
339 /* If the command_loop returned, normally (rather than threw an
340 error) we try to quit. If the quit is aborted, our caller
341 catches the signal and restarts the command loop. */
342 quit_command (NULL, ui->instream == ui->stdin_stream);
345 /* Handle command errors thrown from within catch_command_errors. */
348 handle_command_errors (struct gdb_exception e)
352 exception_print (gdb_stderr, e);
354 /* If any exception escaped to here, we better enable stdin.
355 Otherwise, any command that calls async_disable_stdin, and
356 then throws, will leave stdin inoperable. */
357 async_enable_stdin ();
363 /* Type of the command callback passed to the const
364 catch_command_errors. */
366 typedef void (catch_command_errors_const_ftype) (const char *, int);
368 /* Wrap calls to commands run before the event loop is started. */
371 catch_command_errors (catch_command_errors_const_ftype command,
372 const char *arg, int from_tty)
376 int was_sync = current_ui->prompt_state == PROMPT_BLOCKED;
378 command (arg, from_tty);
380 maybe_wait_sync_command_done (was_sync);
382 CATCH (e, RETURN_MASK_ALL)
384 return handle_command_errors (e);
391 /* Adapter for symbol_file_add_main that translates 'from_tty' to a
392 symfile_add_flags. */
395 symbol_file_add_main_adapter (const char *arg, int from_tty)
397 symfile_add_flags add_flags = 0;
400 add_flags |= SYMFILE_VERBOSE;
402 symbol_file_add_main (arg, add_flags);
405 /* Perform validation of the '--readnow' and '--readnever' flags. */
408 validate_readnow_readnever ()
410 if (readnever_symbol_files && readnow_symbol_files)
412 error (_("%s: '--readnow' and '--readnever' cannot be "
413 "specified simultaneously"),
418 /* Type of this option. */
421 /* Option type -x. */
424 /* Option type -ex. */
427 /* Option type -ix. */
430 /* Option type -iex. */
434 /* Arguments of --command option and its counterpart. */
437 cmdarg (cmdarg_kind type_, char *string_)
438 : type (type_), string (string_)
441 /* Type of this option. */
442 enum cmdarg_kind type;
444 /* Value of this option - filename or the GDB command itself. String memory
445 is not owned by this structure despite it is 'const'. */
450 captured_main_1 (struct captured_main_args *context)
452 int argc = context->argc;
453 char **argv = context->argv;
455 static int quiet = 0;
456 static int set_args = 0;
457 static int inhibit_home_gdbinit = 0;
459 /* Pointers to various arguments from command line. */
461 char *execarg = NULL;
463 char *corearg = NULL;
464 char *pid_or_core_arg = NULL;
468 /* These are static so that we can take their address in an
470 static int print_help;
471 static int print_version;
472 static int print_configuration;
474 /* Pointers to all arguments of --command option. */
475 std::vector<struct cmdarg> cmdarg_vec;
477 /* All arguments of --directory option. */
478 std::vector<char *> dirarg;
480 /* gdb init files. */
481 const char *system_gdbinit;
482 const char *home_gdbinit;
483 const char *local_gdbinit;
487 struct objfile *objfile;
490 /* Set this before constructing scoped_command_stats. */
491 lim_at_start = (char *) sbrk (0);
494 scoped_command_stats stat_reporter (false);
496 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
497 setlocale (LC_MESSAGES, "");
499 #if defined (HAVE_SETLOCALE)
500 setlocale (LC_CTYPE, "");
503 bindtextdomain (PACKAGE, LOCALEDIR);
504 textdomain (PACKAGE);
509 save_original_signals_state ();
511 saved_command_line = (char *) xstrdup ("");
514 /* Ensure stderr is unbuffered. A Cygwin pty or pipe is implemented
515 as a Windows pipe, and Windows buffers on pipes. */
516 setvbuf (stderr, NULL, _IONBF, BUFSIZ);
519 main_ui = new ui (stdin, stdout, stderr);
520 current_ui = main_ui;
522 gdb_stdtargerr = gdb_stderr; /* for moment */
523 gdb_stdtargin = gdb_stdin; /* for moment */
526 /* On Windows, argv[0] is not necessarily set to absolute form when
527 GDB is found along PATH, without which relocation doesn't work. */
528 gdb_program_name = windows_get_absolute_argv0 (argv[0]);
530 gdb_program_name = xstrdup (argv[0]);
533 /* Prefix warning messages with the command name. */
534 gdb::unique_xmalloc_ptr<char> tmp_warn_preprint
535 (xstrprintf ("%s: warning: ", gdb_program_name));
536 warning_pre_print = tmp_warn_preprint.get ();
538 current_directory = getcwd (NULL, 0);
539 if (current_directory == NULL)
540 perror_warning_with_name (_("error finding working directory"));
542 /* Set the sysroot path. */
543 gdb_sysroot = relocate_gdb_directory (TARGET_SYSTEM_ROOT,
544 TARGET_SYSTEM_ROOT_RELOCATABLE);
546 if (gdb_sysroot == NULL || *gdb_sysroot == '\0')
549 gdb_sysroot = xstrdup (TARGET_SYSROOT_PREFIX);
552 debug_file_directory = relocate_gdb_directory (DEBUGDIR,
553 DEBUGDIR_RELOCATABLE);
555 gdb_datadir = relocate_gdb_directory (GDB_DATADIR,
556 GDB_DATADIR_RELOCATABLE);
558 #ifdef WITH_PYTHON_PATH
560 /* For later use in helping Python find itself. */
561 char *tmp = concat (WITH_PYTHON_PATH, SLASH_STRING, "lib", (char *) NULL);
563 python_libdir = relocate_gdb_directory (tmp, PYTHON_PATH_RELOCATABLE);
569 add_substitute_path_rule (RELOC_SRCDIR,
570 make_relative_prefix (gdb_program_name, BINDIR,
574 /* There will always be an interpreter. Either the one passed into
575 this captured main, or one specified by the user at start up, or
576 the console. Initialize the interpreter to the one requested by
578 interpreter_p = xstrdup (context->interpreter_p);
580 /* Parse arguments and options. */
583 /* When var field is 0, use flag field to record the equivalent
584 short option (or arbitrary numbers starting at 10 for those
585 with no equivalent). */
599 static struct option long_options[] =
601 {"tui", no_argument, 0, OPT_TUI},
602 {"dbx", no_argument, &dbx_commands, 1},
603 {"readnow", no_argument, NULL, OPT_READNOW},
604 {"readnever", no_argument, NULL, OPT_READNEVER},
605 {"r", no_argument, NULL, OPT_READNOW},
606 {"quiet", no_argument, &quiet, 1},
607 {"q", no_argument, &quiet, 1},
608 {"silent", no_argument, &quiet, 1},
609 {"nh", no_argument, &inhibit_home_gdbinit, 1},
610 {"nx", no_argument, &inhibit_gdbinit, 1},
611 {"n", no_argument, &inhibit_gdbinit, 1},
612 {"batch-silent", no_argument, 0, 'B'},
613 {"batch", no_argument, &batch_flag, 1},
615 /* This is a synonym for "--annotate=1". --annotate is now
616 preferred, but keep this here for a long time because people
617 will be running emacses which use --fullname. */
618 {"fullname", no_argument, 0, 'f'},
619 {"f", no_argument, 0, 'f'},
621 {"annotate", required_argument, 0, OPT_ANNOTATE},
622 {"help", no_argument, &print_help, 1},
623 {"se", required_argument, 0, OPT_SE},
624 {"symbols", required_argument, 0, 's'},
625 {"s", required_argument, 0, 's'},
626 {"exec", required_argument, 0, 'e'},
627 {"e", required_argument, 0, 'e'},
628 {"core", required_argument, 0, 'c'},
629 {"c", required_argument, 0, 'c'},
630 {"pid", required_argument, 0, 'p'},
631 {"p", required_argument, 0, 'p'},
632 {"command", required_argument, 0, 'x'},
633 {"eval-command", required_argument, 0, 'X'},
634 {"version", no_argument, &print_version, 1},
635 {"configuration", no_argument, &print_configuration, 1},
636 {"x", required_argument, 0, 'x'},
637 {"ex", required_argument, 0, 'X'},
638 {"init-command", required_argument, 0, OPT_IX},
639 {"init-eval-command", required_argument, 0, OPT_IEX},
640 {"ix", required_argument, 0, OPT_IX},
641 {"iex", required_argument, 0, OPT_IEX},
643 {"tclcommand", required_argument, 0, 'z'},
644 {"enable-external-editor", no_argument, 0, 'y'},
645 {"editor-command", required_argument, 0, 'w'},
647 {"ui", required_argument, 0, 'i'},
648 {"interpreter", required_argument, 0, 'i'},
649 {"i", required_argument, 0, 'i'},
650 {"directory", required_argument, 0, 'd'},
651 {"d", required_argument, 0, 'd'},
652 {"data-directory", required_argument, 0, 'D'},
653 {"D", required_argument, 0, 'D'},
654 {"cd", required_argument, 0, OPT_CD},
655 {"tty", required_argument, 0, 't'},
656 {"baud", required_argument, 0, 'b'},
657 {"b", required_argument, 0, 'b'},
658 {"nw", no_argument, NULL, OPT_NOWINDOWS},
659 {"nowindows", no_argument, NULL, OPT_NOWINDOWS},
660 {"w", no_argument, NULL, OPT_WINDOWS},
661 {"windows", no_argument, NULL, OPT_WINDOWS},
662 {"statistics", no_argument, 0, OPT_STATISTICS},
663 {"write", no_argument, &write_files, 1},
664 {"args", no_argument, &set_args, 1},
665 {"l", required_argument, 0, 'l'},
666 {"return-child-result", no_argument, &return_child_result, 1},
667 {0, no_argument, 0, 0}
674 c = getopt_long_only (argc, argv, "",
675 long_options, &option_index);
676 if (c == EOF || set_args)
679 /* Long option that takes an argument. */
680 if (c == 0 && long_options[option_index].flag == 0)
681 c = long_options[option_index].val;
686 /* Long option that just sets a flag. */
696 /* FIXME: what if the syntax is wrong (e.g. not digits)? */
697 annotation_level = atoi (optarg);
700 /* Enable the display of both time and space usage. */
701 set_per_command_time (1);
702 set_per_command_space (1);
705 /* --tui is equivalent to -i=tui. */
707 xfree (interpreter_p);
708 interpreter_p = xstrdup (INTERP_TUI);
710 error (_("%s: TUI mode is not supported"), gdb_program_name);
714 /* FIXME: cagney/2003-03-01: Not sure if this option is
715 actually useful, and if it is, what it should do. */
717 /* --windows is equivalent to -i=insight. */
718 xfree (interpreter_p);
719 interpreter_p = xstrdup (INTERP_INSIGHT);
723 /* -nw is equivalent to -i=console. */
724 xfree (interpreter_p);
725 interpreter_p = xstrdup (INTERP_CONSOLE);
728 annotation_level = 1;
743 cmdarg_vec.emplace_back (CMDARG_FILE, optarg);
746 cmdarg_vec.emplace_back (CMDARG_COMMAND, optarg);
749 cmdarg_vec.emplace_back (CMDARG_INIT_FILE, optarg);
752 cmdarg_vec.emplace_back (CMDARG_INIT_COMMAND, optarg);
755 batch_flag = batch_silent = 1;
756 gdb_stdout = new null_file ();
759 if (optarg[0] == '\0')
760 error (_("%s: empty path for `--data-directory'"),
762 set_gdb_data_directory (optarg);
763 gdb_datadir_provided = 1;
768 extern int gdbtk_test (char *);
770 if (!gdbtk_test (optarg))
771 error (_("%s: unable to load tclcommand file \"%s\""),
772 gdb_program_name, optarg);
776 /* Backwards compatibility only. */
780 /* Set the external editor commands when gdb is farming out files
781 to be edited by another program. */
782 extern char *external_editor_command;
784 external_editor_command = xstrdup (optarg);
789 xfree (interpreter_p);
790 interpreter_p = xstrdup (optarg);
793 dirarg.push_back (optarg);
806 i = strtol (optarg, &p, 0);
807 if (i == 0 && p == optarg)
808 warning (_("could not set baud rate to `%s'."),
819 i = strtol (optarg, &p, 0);
820 if (i == 0 && p == optarg)
821 warning (_("could not set timeout limit to `%s'."),
830 readnow_symbol_files = 1;
831 validate_readnow_readnever ();
837 readnever_symbol_files = 1;
838 validate_readnow_readnever ();
843 error (_("Use `%s --help' for a complete list of options."),
852 /* Try to set up an alternate signal stack for SIGSEGV handlers. */
853 setup_alternate_signal_stack ();
855 /* Initialize all files. */
856 gdb_init (gdb_program_name);
858 /* Now that gdb_init has created the initial inferior, we're in
859 position to set args for that inferior. */
862 /* The remaining options are the command-line options for the
863 inferior. The first one is the sym/exec file, and the rest
866 error (_("%s: `--args' specified but no program specified"),
869 symarg = argv[optind];
870 execarg = argv[optind];
872 set_inferior_args_vector (argc - optind, &argv[optind]);
876 /* OK, that's all the options. */
878 /* The first argument, if specified, is the name of the
882 symarg = argv[optind];
883 execarg = argv[optind];
887 /* If the user hasn't already specified a PID or the name of a
888 core file, then a second optional argument is allowed. If
889 present, this argument should be interpreted as either a
890 PID or a core file, whichever works. */
891 if (pidarg == NULL && corearg == NULL && optind < argc)
893 pid_or_core_arg = argv[optind];
897 /* Any argument left on the command line is unexpected and
898 will be ignored. Inform the user. */
900 fprintf_unfiltered (gdb_stderr,
901 _("Excess command line "
902 "arguments ignored. (%s%s)\n"),
904 (optind == argc - 1) ? "" : " ...");
907 /* Lookup gdbinit files. Note that the gdbinit file name may be
908 overriden during file initialization, so get_init_files should be
909 called after gdb_init. */
910 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
912 /* Do these (and anything which might call wrap_here or *_filtered)
913 after initialize_all_files() but before the interpreter has been
914 installed. Otherwize the help/version messages will be eaten by
915 the interpreter's output handler. */
919 print_gdb_version (gdb_stdout);
921 printf_filtered ("\n");
927 print_gdb_help (gdb_stdout);
928 fputs_unfiltered ("\n", gdb_stdout);
932 if (print_configuration)
934 print_gdb_configuration (gdb_stdout);
936 printf_filtered ("\n");
940 /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
941 GDB retain the old MI1 interpreter startup behavior. Output the
942 copyright message before the interpreter is installed. That way
943 it isn't encapsulated in MI output. */
944 if (!quiet && strcmp (interpreter_p, INTERP_MI1) == 0)
946 /* Print all the junk at the top, with trailing "..." if we are
947 about to read a symbol file (possibly slowly). */
948 print_gdb_version (gdb_stdout);
950 printf_filtered ("..");
952 printf_filtered ("\n");
953 gdb_flush (gdb_stdout); /* Force to screen during slow
957 /* Install the default UI. All the interpreters should have had a
958 look at things by now. Initialize the default interpreter. */
959 set_top_level_interpreter (interpreter_p);
961 /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets
962 GDB retain the old MI1 interpreter startup behavior. Output the
963 copyright message after the interpreter is installed when it is
964 any sane interpreter. */
965 if (!quiet && !current_interp_named_p (INTERP_MI1))
967 /* Print all the junk at the top, with trailing "..." if we are
968 about to read a symbol file (possibly slowly). */
969 print_gdb_version (gdb_stdout);
971 printf_filtered ("..");
973 printf_filtered ("\n");
974 gdb_flush (gdb_stdout); /* Force to screen during slow
978 /* Set off error and warning messages with a blank line. */
979 tmp_warn_preprint.reset ();
980 warning_pre_print = _("\nwarning: ");
982 /* Read and execute the system-wide gdbinit file, if it exists.
983 This is done *before* all the command line arguments are
984 processed; it sets global parameters, which are independent of
985 what file you are debugging or what directory you are in. */
986 if (system_gdbinit && !inhibit_gdbinit)
987 catch_command_errors (source_script, system_gdbinit, 0);
989 /* Read and execute $HOME/.gdbinit file, if it exists. This is done
990 *before* all the command line arguments are processed; it sets
991 global parameters, which are independent of what file you are
992 debugging or what directory you are in. */
994 if (home_gdbinit && !inhibit_gdbinit && !inhibit_home_gdbinit)
995 catch_command_errors (source_script, home_gdbinit, 0);
997 /* Process '-ix' and '-iex' options early. */
998 for (i = 0; i < cmdarg_vec.size (); i++)
1000 const struct cmdarg &cmdarg_p = cmdarg_vec[i];
1002 switch (cmdarg_p.type)
1004 case CMDARG_INIT_FILE:
1005 catch_command_errors (source_script, cmdarg_p.string,
1008 case CMDARG_INIT_COMMAND:
1009 catch_command_errors (execute_command, cmdarg_p.string,
1015 /* Now perform all the actions indicated by the arguments. */
1018 catch_command_errors (cd_command, cdarg, 0);
1021 for (i = 0; i < dirarg.size (); i++)
1022 catch_command_errors (directory_switch, dirarg[i], 0);
1024 /* Skip auto-loading section-specified scripts until we've sourced
1025 local_gdbinit (which is often used to augment the source search
1027 save_auto_load = global_auto_load;
1028 global_auto_load = 0;
1032 && strcmp (execarg, symarg) == 0)
1034 /* The exec file and the symbol-file are the same. If we can't
1035 open it, better only print one error message.
1036 catch_command_errors returns non-zero on success! */
1037 if (catch_command_errors (exec_file_attach, execarg,
1039 catch_command_errors (symbol_file_add_main_adapter, symarg,
1044 if (execarg != NULL)
1045 catch_command_errors (exec_file_attach, execarg,
1048 catch_command_errors (symbol_file_add_main_adapter, symarg,
1052 if (corearg && pidarg)
1053 error (_("Can't attach to process and specify "
1054 "a core file at the same time."));
1056 if (corearg != NULL)
1057 catch_command_errors (core_file_command, corearg, !batch_flag);
1058 else if (pidarg != NULL)
1059 catch_command_errors (attach_command, pidarg, !batch_flag);
1060 else if (pid_or_core_arg)
1062 /* The user specified 'gdb program pid' or gdb program core'.
1063 If pid_or_core_arg's first character is a digit, try attach
1064 first and then corefile. Otherwise try just corefile. */
1066 if (isdigit (pid_or_core_arg[0]))
1068 if (catch_command_errors (attach_command, pid_or_core_arg,
1070 catch_command_errors (core_file_command, pid_or_core_arg,
1073 else /* Can't be a pid, better be a corefile. */
1074 catch_command_errors (core_file_command, pid_or_core_arg,
1079 set_inferior_io_terminal (ttyarg);
1081 /* Error messages should no longer be distinguished with extra output. */
1082 warning_pre_print = _("warning: ");
1084 /* Read the .gdbinit file in the current directory, *if* it isn't
1085 the same as the $HOME/.gdbinit file (it should exist, also). */
1088 auto_load_local_gdbinit_pathname
1089 = gdb_realpath (local_gdbinit).release ();
1091 if (!inhibit_gdbinit && auto_load_local_gdbinit
1092 && file_is_auto_load_safe (local_gdbinit,
1093 _("auto-load: Loading .gdbinit "
1097 auto_load_local_gdbinit_loaded = 1;
1099 catch_command_errors (source_script, local_gdbinit, 0);
1103 /* Now that all .gdbinit's have been read and all -d options have been
1104 processed, we can read any scripts mentioned in SYMARG.
1105 We wait until now because it is common to add to the source search
1106 path in local_gdbinit. */
1107 global_auto_load = save_auto_load;
1108 ALL_OBJFILES (objfile)
1109 load_auto_scripts_for_objfile (objfile);
1111 /* Process '-x' and '-ex' options. */
1112 for (i = 0; i < cmdarg_vec.size (); i++)
1114 const struct cmdarg &cmdarg_p = cmdarg_vec[i];
1116 switch (cmdarg_p.type)
1119 catch_command_errors (source_script, cmdarg_p.string,
1122 case CMDARG_COMMAND:
1123 catch_command_errors (execute_command, cmdarg_p.string,
1129 /* Read in the old history after all the command files have been
1135 /* We have hit the end of the batch file. */
1136 quit_force (NULL, 0);
1141 captured_main (void *data)
1143 struct captured_main_args *context = (struct captured_main_args *) data;
1145 captured_main_1 (context);
1147 /* NOTE: cagney/1999-11-07: There is probably no reason for not
1148 moving this loop and the code found in captured_command_loop()
1149 into the command_loop() proper. The main thing holding back that
1150 change - SET_TOP_LEVEL() - has been eliminated. */
1155 captured_command_loop ();
1157 CATCH (ex, RETURN_MASK_ALL)
1159 exception_print (gdb_stderr, ex);
1163 /* No exit -- exit is through quit_command. */
1167 gdb_main (struct captured_main_args *args)
1171 captured_main (args);
1173 CATCH (ex, RETURN_MASK_ALL)
1175 exception_print (gdb_stderr, ex);
1179 /* The only way to end up here is by an error (normal exit is
1180 handled by quit_force()), hence always return an error status. */
1185 /* Don't use *_filtered for printing help. We don't want to prompt
1186 for continue no matter how small the screen or how much we're going
1190 print_gdb_help (struct ui_file *stream)
1192 const char *system_gdbinit;
1193 const char *home_gdbinit;
1194 const char *local_gdbinit;
1196 get_init_files (&system_gdbinit, &home_gdbinit, &local_gdbinit);
1198 /* Note: The options in the list below are only approximately sorted
1199 in the alphabetical order, so as to group closely related options
1201 fputs_unfiltered (_("\
1202 This is the GNU debugger. Usage:\n\n\
1203 gdb [options] [executable-file [core-file or process-id]]\n\
1204 gdb [options] --args executable-file [inferior-arguments ...]\n\n\
1206 fputs_unfiltered (_("\
1207 Selection of debuggee and its files:\n\n\
1208 --args Arguments after executable-file are passed to inferior\n\
1209 --core=COREFILE Analyze the core dump COREFILE.\n\
1210 --exec=EXECFILE Use EXECFILE as the executable.\n\
1211 --pid=PID Attach to running process PID.\n\
1212 --directory=DIR Search for source files in DIR.\n\
1213 --se=FILE Use FILE as symbol file and executable file.\n\
1214 --symbols=SYMFILE Read symbols from SYMFILE.\n\
1215 --readnow Fully read symbol files on first access.\n\
1216 --readnever Do not read symbol files.\n\
1217 --write Set writing into executable and core files.\n\n\
1219 fputs_unfiltered (_("\
1220 Initial commands and command files:\n\n\
1221 --command=FILE, -x Execute GDB commands from FILE.\n\
1222 --init-command=FILE, -ix\n\
1223 Like -x but execute commands before loading inferior.\n\
1224 --eval-command=COMMAND, -ex\n\
1225 Execute a single GDB command.\n\
1226 May be used multiple times and in conjunction\n\
1228 --init-eval-command=COMMAND, -iex\n\
1229 Like -ex but before loading inferior.\n\
1230 --nh Do not read ~/.gdbinit.\n\
1231 --nx Do not read any .gdbinit files in any directory.\n\n\
1233 fputs_unfiltered (_("\
1234 Output and user interface control:\n\n\
1235 --fullname Output information used by emacs-GDB interface.\n\
1236 --interpreter=INTERP\n\
1237 Select a specific interpreter / user interface\n\
1238 --tty=TTY Use TTY for input/output by the program being debugged.\n\
1239 -w Use the GUI interface.\n\
1240 --nw Do not use the GUI interface.\n\
1243 fputs_unfiltered (_("\
1244 --tui Use a terminal user interface.\n\
1247 fputs_unfiltered (_("\
1248 --dbx DBX compatibility mode.\n\
1249 -q, --quiet, --silent\n\
1250 Do not print version number on startup.\n\n\
1252 fputs_unfiltered (_("\
1253 Operating modes:\n\n\
1254 --batch Exit after processing options.\n\
1255 --batch-silent Like --batch, but suppress all gdb stdout output.\n\
1256 --return-child-result\n\
1257 GDB exit code will be the child's exit code.\n\
1258 --configuration Print details about GDB configuration and then exit.\n\
1259 --help Print this message and then exit.\n\
1260 --version Print version information and then exit.\n\n\
1261 Remote debugging options:\n\n\
1262 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
1263 -l TIMEOUT Set timeout in seconds for remote debugging.\n\n\
1265 --cd=DIR Change current directory to DIR.\n\
1266 --data-directory=DIR, -D\n\
1267 Set GDB's data-directory to DIR.\n\
1269 fputs_unfiltered (_("\n\
1270 At startup, GDB reads the following init files and executes their commands:\n\
1273 fprintf_unfiltered (stream, _("\
1274 * system-wide init file: %s\n\
1275 "), system_gdbinit);
1277 fprintf_unfiltered (stream, _("\
1278 * user-specific init file: %s\n\
1281 fprintf_unfiltered (stream, _("\
1282 * local init file (see also 'set auto-load local-gdbinit'): ./%s\n\
1284 fputs_unfiltered (_("\n\
1285 For more information, type \"help\" from within GDB, or consult the\n\
1286 GDB manual (available as on-line info or a printed manual).\n\
1288 if (REPORT_BUGS_TO[0] && stream == gdb_stdout)
1289 fprintf_unfiltered (stream, _("\
1290 Report bugs to \"%s\".\n\
1291 "), REPORT_BUGS_TO);