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 /* Type of this option. */
408 /* Option type -x. */
411 /* Option type -ex. */
414 /* Option type -ix. */
417 /* Option type -iex. */
421 /* Arguments of --command option and its counterpart. */
424 cmdarg (cmdarg_kind type_
, char *string_
)
425 : type (type_
), string (string_
)
428 /* Type of this option. */
429 enum cmdarg_kind type
;
431 /* Value of this option - filename or the GDB command itself. String memory
432 is not owned by this structure despite it is 'const'. */
437 captured_main_1 (struct captured_main_args
*context
)
439 int argc
= context
->argc
;
440 char **argv
= context
->argv
;
442 static int quiet
= 0;
443 static int set_args
= 0;
444 static int inhibit_home_gdbinit
= 0;
446 /* Pointers to various arguments from command line. */
448 char *execarg
= NULL
;
450 char *corearg
= NULL
;
451 char *pid_or_core_arg
= NULL
;
455 /* These are static so that we can take their address in an
457 static int print_help
;
458 static int print_version
;
459 static int print_configuration
;
461 /* Pointers to all arguments of --command option. */
462 std::vector
<struct cmdarg
> cmdarg_vec
;
464 /* All arguments of --directory option. */
465 std::vector
<char *> dirarg
;
467 /* gdb init files. */
468 const char *system_gdbinit
;
469 const char *home_gdbinit
;
470 const char *local_gdbinit
;
474 struct objfile
*objfile
;
477 /* Set this before constructing scoped_command_stats. */
478 lim_at_start
= (char *) sbrk (0);
481 scoped_command_stats
stat_reporter (false);
483 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
484 setlocale (LC_MESSAGES
, "");
486 #if defined (HAVE_SETLOCALE)
487 setlocale (LC_CTYPE
, "");
490 bindtextdomain (PACKAGE
, LOCALEDIR
);
491 textdomain (PACKAGE
);
496 save_original_signals_state ();
498 saved_command_line
= (char *) xstrdup ("");
501 /* Ensure stderr is unbuffered. A Cygwin pty or pipe is implemented
502 as a Windows pipe, and Windows buffers on pipes. */
503 setvbuf (stderr
, NULL
, _IONBF
, BUFSIZ
);
506 main_ui
= new ui (stdin
, stdout
, stderr
);
507 current_ui
= main_ui
;
509 gdb_stdtargerr
= gdb_stderr
; /* for moment */
510 gdb_stdtargin
= gdb_stdin
; /* for moment */
513 /* On Windows, argv[0] is not necessarily set to absolute form when
514 GDB is found along PATH, without which relocation doesn't work. */
515 gdb_program_name
= windows_get_absolute_argv0 (argv
[0]);
517 gdb_program_name
= xstrdup (argv
[0]);
520 /* Prefix warning messages with the command name. */
521 gdb::unique_xmalloc_ptr
<char> tmp_warn_preprint
522 (xstrprintf ("%s: warning: ", gdb_program_name
));
523 warning_pre_print
= tmp_warn_preprint
.get ();
525 current_directory
= getcwd (NULL
, 0);
526 if (current_directory
== NULL
)
527 perror_warning_with_name (_("error finding working directory"));
529 /* Set the sysroot path. */
530 gdb_sysroot
= relocate_gdb_directory (TARGET_SYSTEM_ROOT
,
531 TARGET_SYSTEM_ROOT_RELOCATABLE
);
533 if (gdb_sysroot
== NULL
|| *gdb_sysroot
== '\0')
536 gdb_sysroot
= xstrdup (TARGET_SYSROOT_PREFIX
);
539 debug_file_directory
= relocate_gdb_directory (DEBUGDIR
,
540 DEBUGDIR_RELOCATABLE
);
542 gdb_datadir
= relocate_gdb_directory (GDB_DATADIR
,
543 GDB_DATADIR_RELOCATABLE
);
545 #ifdef WITH_PYTHON_PATH
547 /* For later use in helping Python find itself. */
548 char *tmp
= concat (WITH_PYTHON_PATH
, SLASH_STRING
, "lib", (char *) NULL
);
550 python_libdir
= relocate_gdb_directory (tmp
, PYTHON_PATH_RELOCATABLE
);
556 add_substitute_path_rule (RELOC_SRCDIR
,
557 make_relative_prefix (gdb_program_name
, BINDIR
,
561 /* There will always be an interpreter. Either the one passed into
562 this captured main, or one specified by the user at start up, or
563 the console. Initialize the interpreter to the one requested by
565 interpreter_p
= xstrdup (context
->interpreter_p
);
567 /* Parse arguments and options. */
570 /* When var field is 0, use flag field to record the equivalent
571 short option (or arbitrary numbers starting at 10 for those
572 with no equivalent). */
584 static struct option long_options
[] =
586 {"tui", no_argument
, 0, OPT_TUI
},
587 {"dbx", no_argument
, &dbx_commands
, 1},
588 {"readnow", no_argument
, &readnow_symbol_files
, 1},
589 {"r", no_argument
, &readnow_symbol_files
, 1},
590 {"quiet", no_argument
, &quiet
, 1},
591 {"q", no_argument
, &quiet
, 1},
592 {"silent", no_argument
, &quiet
, 1},
593 {"nh", no_argument
, &inhibit_home_gdbinit
, 1},
594 {"nx", no_argument
, &inhibit_gdbinit
, 1},
595 {"n", no_argument
, &inhibit_gdbinit
, 1},
596 {"batch-silent", no_argument
, 0, 'B'},
597 {"batch", no_argument
, &batch_flag
, 1},
599 /* This is a synonym for "--annotate=1". --annotate is now
600 preferred, but keep this here for a long time because people
601 will be running emacses which use --fullname. */
602 {"fullname", no_argument
, 0, 'f'},
603 {"f", no_argument
, 0, 'f'},
605 {"annotate", required_argument
, 0, OPT_ANNOTATE
},
606 {"help", no_argument
, &print_help
, 1},
607 {"se", required_argument
, 0, OPT_SE
},
608 {"symbols", required_argument
, 0, 's'},
609 {"s", required_argument
, 0, 's'},
610 {"exec", required_argument
, 0, 'e'},
611 {"e", required_argument
, 0, 'e'},
612 {"core", required_argument
, 0, 'c'},
613 {"c", required_argument
, 0, 'c'},
614 {"pid", required_argument
, 0, 'p'},
615 {"p", required_argument
, 0, 'p'},
616 {"command", required_argument
, 0, 'x'},
617 {"eval-command", required_argument
, 0, 'X'},
618 {"version", no_argument
, &print_version
, 1},
619 {"configuration", no_argument
, &print_configuration
, 1},
620 {"x", required_argument
, 0, 'x'},
621 {"ex", required_argument
, 0, 'X'},
622 {"init-command", required_argument
, 0, OPT_IX
},
623 {"init-eval-command", required_argument
, 0, OPT_IEX
},
624 {"ix", required_argument
, 0, OPT_IX
},
625 {"iex", required_argument
, 0, OPT_IEX
},
627 {"tclcommand", required_argument
, 0, 'z'},
628 {"enable-external-editor", no_argument
, 0, 'y'},
629 {"editor-command", required_argument
, 0, 'w'},
631 {"ui", required_argument
, 0, 'i'},
632 {"interpreter", required_argument
, 0, 'i'},
633 {"i", required_argument
, 0, 'i'},
634 {"directory", required_argument
, 0, 'd'},
635 {"d", required_argument
, 0, 'd'},
636 {"data-directory", required_argument
, 0, 'D'},
637 {"D", required_argument
, 0, 'D'},
638 {"cd", required_argument
, 0, OPT_CD
},
639 {"tty", required_argument
, 0, 't'},
640 {"baud", required_argument
, 0, 'b'},
641 {"b", required_argument
, 0, 'b'},
642 {"nw", no_argument
, NULL
, OPT_NOWINDOWS
},
643 {"nowindows", no_argument
, NULL
, OPT_NOWINDOWS
},
644 {"w", no_argument
, NULL
, OPT_WINDOWS
},
645 {"windows", no_argument
, NULL
, OPT_WINDOWS
},
646 {"statistics", no_argument
, 0, OPT_STATISTICS
},
647 {"write", no_argument
, &write_files
, 1},
648 {"args", no_argument
, &set_args
, 1},
649 {"l", required_argument
, 0, 'l'},
650 {"return-child-result", no_argument
, &return_child_result
, 1},
651 {0, no_argument
, 0, 0}
658 c
= getopt_long_only (argc
, argv
, "",
659 long_options
, &option_index
);
660 if (c
== EOF
|| set_args
)
663 /* Long option that takes an argument. */
664 if (c
== 0 && long_options
[option_index
].flag
== 0)
665 c
= long_options
[option_index
].val
;
670 /* Long option that just sets a flag. */
680 /* FIXME: what if the syntax is wrong (e.g. not digits)? */
681 annotation_level
= atoi (optarg
);
684 /* Enable the display of both time and space usage. */
685 set_per_command_time (1);
686 set_per_command_space (1);
689 /* --tui is equivalent to -i=tui. */
691 xfree (interpreter_p
);
692 interpreter_p
= xstrdup (INTERP_TUI
);
694 error (_("%s: TUI mode is not supported"), gdb_program_name
);
698 /* FIXME: cagney/2003-03-01: Not sure if this option is
699 actually useful, and if it is, what it should do. */
701 /* --windows is equivalent to -i=insight. */
702 xfree (interpreter_p
);
703 interpreter_p
= xstrdup (INTERP_INSIGHT
);
707 /* -nw is equivalent to -i=console. */
708 xfree (interpreter_p
);
709 interpreter_p
= xstrdup (INTERP_CONSOLE
);
712 annotation_level
= 1;
727 cmdarg_vec
.emplace_back (CMDARG_FILE
, optarg
);
730 cmdarg_vec
.emplace_back (CMDARG_COMMAND
, optarg
);
733 cmdarg_vec
.emplace_back (CMDARG_INIT_FILE
, optarg
);
736 cmdarg_vec
.emplace_back (CMDARG_INIT_COMMAND
, optarg
);
739 batch_flag
= batch_silent
= 1;
740 gdb_stdout
= new null_file ();
743 if (optarg
[0] == '\0')
744 error (_("%s: empty path for `--data-directory'"),
746 set_gdb_data_directory (optarg
);
747 gdb_datadir_provided
= 1;
752 extern int gdbtk_test (char *);
754 if (!gdbtk_test (optarg
))
755 error (_("%s: unable to load tclcommand file \"%s\""),
756 gdb_program_name
, optarg
);
760 /* Backwards compatibility only. */
764 /* Set the external editor commands when gdb is farming out files
765 to be edited by another program. */
766 extern char *external_editor_command
;
768 external_editor_command
= xstrdup (optarg
);
773 xfree (interpreter_p
);
774 interpreter_p
= xstrdup (optarg
);
777 dirarg
.push_back (optarg
);
790 i
= strtol (optarg
, &p
, 0);
791 if (i
== 0 && p
== optarg
)
792 warning (_("could not set baud rate to `%s'."),
803 i
= strtol (optarg
, &p
, 0);
804 if (i
== 0 && p
== optarg
)
805 warning (_("could not set timeout limit to `%s'."),
813 error (_("Use `%s --help' for a complete list of options."),
822 /* Try to set up an alternate signal stack for SIGSEGV handlers. */
823 setup_alternate_signal_stack ();
825 /* Initialize all files. */
826 gdb_init (gdb_program_name
);
828 /* Now that gdb_init has created the initial inferior, we're in
829 position to set args for that inferior. */
832 /* The remaining options are the command-line options for the
833 inferior. The first one is the sym/exec file, and the rest
836 error (_("%s: `--args' specified but no program specified"),
839 symarg
= argv
[optind
];
840 execarg
= argv
[optind
];
842 set_inferior_args_vector (argc
- optind
, &argv
[optind
]);
846 /* OK, that's all the options. */
848 /* The first argument, if specified, is the name of the
852 symarg
= argv
[optind
];
853 execarg
= argv
[optind
];
857 /* If the user hasn't already specified a PID or the name of a
858 core file, then a second optional argument is allowed. If
859 present, this argument should be interpreted as either a
860 PID or a core file, whichever works. */
861 if (pidarg
== NULL
&& corearg
== NULL
&& optind
< argc
)
863 pid_or_core_arg
= argv
[optind
];
867 /* Any argument left on the command line is unexpected and
868 will be ignored. Inform the user. */
870 fprintf_unfiltered (gdb_stderr
,
871 _("Excess command line "
872 "arguments ignored. (%s%s)\n"),
874 (optind
== argc
- 1) ? "" : " ...");
877 /* Lookup gdbinit files. Note that the gdbinit file name may be
878 overriden during file initialization, so get_init_files should be
879 called after gdb_init. */
880 get_init_files (&system_gdbinit
, &home_gdbinit
, &local_gdbinit
);
882 /* Do these (and anything which might call wrap_here or *_filtered)
883 after initialize_all_files() but before the interpreter has been
884 installed. Otherwize the help/version messages will be eaten by
885 the interpreter's output handler. */
889 print_gdb_version (gdb_stdout
);
891 printf_filtered ("\n");
897 print_gdb_help (gdb_stdout
);
898 fputs_unfiltered ("\n", gdb_stdout
);
902 if (print_configuration
)
904 print_gdb_configuration (gdb_stdout
);
906 printf_filtered ("\n");
910 /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
911 GDB retain the old MI1 interpreter startup behavior. Output the
912 copyright message before the interpreter is installed. That way
913 it isn't encapsulated in MI output. */
914 if (!quiet
&& strcmp (interpreter_p
, INTERP_MI1
) == 0)
916 /* Print all the junk at the top, with trailing "..." if we are
917 about to read a symbol file (possibly slowly). */
918 print_gdb_version (gdb_stdout
);
920 printf_filtered ("..");
922 printf_filtered ("\n");
923 gdb_flush (gdb_stdout
); /* Force to screen during slow
927 /* Install the default UI. All the interpreters should have had a
928 look at things by now. Initialize the default interpreter. */
929 set_top_level_interpreter (interpreter_p
);
931 /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets
932 GDB retain the old MI1 interpreter startup behavior. Output the
933 copyright message after the interpreter is installed when it is
934 any sane interpreter. */
935 if (!quiet
&& !current_interp_named_p (INTERP_MI1
))
937 /* Print all the junk at the top, with trailing "..." if we are
938 about to read a symbol file (possibly slowly). */
939 print_gdb_version (gdb_stdout
);
941 printf_filtered ("..");
943 printf_filtered ("\n");
944 gdb_flush (gdb_stdout
); /* Force to screen during slow
948 /* Set off error and warning messages with a blank line. */
949 tmp_warn_preprint
.reset ();
950 warning_pre_print
= _("\nwarning: ");
952 /* Read and execute the system-wide gdbinit file, if it exists.
953 This is done *before* all the command line arguments are
954 processed; it sets global parameters, which are independent of
955 what file you are debugging or what directory you are in. */
956 if (system_gdbinit
&& !inhibit_gdbinit
)
957 catch_command_errors (source_script
, system_gdbinit
, 0);
959 /* Read and execute $HOME/.gdbinit file, if it exists. This is done
960 *before* all the command line arguments are processed; it sets
961 global parameters, which are independent of what file you are
962 debugging or what directory you are in. */
964 if (home_gdbinit
&& !inhibit_gdbinit
&& !inhibit_home_gdbinit
)
965 catch_command_errors (source_script
, home_gdbinit
, 0);
967 /* Process '-ix' and '-iex' options early. */
968 for (i
= 0; i
< cmdarg_vec
.size (); i
++)
970 const struct cmdarg
&cmdarg_p
= cmdarg_vec
[i
];
972 switch (cmdarg_p
.type
)
974 case CMDARG_INIT_FILE
:
975 catch_command_errors (source_script
, cmdarg_p
.string
,
978 case CMDARG_INIT_COMMAND
:
979 catch_command_errors (execute_command
, cmdarg_p
.string
,
985 /* Now perform all the actions indicated by the arguments. */
988 catch_command_errors (cd_command
, cdarg
, 0);
991 for (i
= 0; i
< dirarg
.size (); i
++)
992 catch_command_errors (directory_switch
, dirarg
[i
], 0);
994 /* Skip auto-loading section-specified scripts until we've sourced
995 local_gdbinit (which is often used to augment the source search
997 save_auto_load
= global_auto_load
;
998 global_auto_load
= 0;
1002 && strcmp (execarg
, symarg
) == 0)
1004 /* The exec file and the symbol-file are the same. If we can't
1005 open it, better only print one error message.
1006 catch_command_errors returns non-zero on success! */
1007 if (catch_command_errors (exec_file_attach
, execarg
,
1009 catch_command_errors (symbol_file_add_main_adapter
, symarg
,
1014 if (execarg
!= NULL
)
1015 catch_command_errors (exec_file_attach
, execarg
,
1018 catch_command_errors (symbol_file_add_main_adapter
, symarg
,
1022 if (corearg
&& pidarg
)
1023 error (_("Can't attach to process and specify "
1024 "a core file at the same time."));
1026 if (corearg
!= NULL
)
1027 catch_command_errors (core_file_command
, corearg
, !batch_flag
);
1028 else if (pidarg
!= NULL
)
1029 catch_command_errors (attach_command
, pidarg
, !batch_flag
);
1030 else if (pid_or_core_arg
)
1032 /* The user specified 'gdb program pid' or gdb program core'.
1033 If pid_or_core_arg's first character is a digit, try attach
1034 first and then corefile. Otherwise try just corefile. */
1036 if (isdigit (pid_or_core_arg
[0]))
1038 if (catch_command_errors (attach_command
, pid_or_core_arg
,
1040 catch_command_errors (core_file_command
, pid_or_core_arg
,
1043 else /* Can't be a pid, better be a corefile. */
1044 catch_command_errors (core_file_command
, pid_or_core_arg
,
1049 set_inferior_io_terminal (ttyarg
);
1051 /* Error messages should no longer be distinguished with extra output. */
1052 warning_pre_print
= _("warning: ");
1054 /* Read the .gdbinit file in the current directory, *if* it isn't
1055 the same as the $HOME/.gdbinit file (it should exist, also). */
1058 auto_load_local_gdbinit_pathname
1059 = gdb_realpath (local_gdbinit
).release ();
1061 if (!inhibit_gdbinit
&& auto_load_local_gdbinit
1062 && file_is_auto_load_safe (local_gdbinit
,
1063 _("auto-load: Loading .gdbinit "
1067 auto_load_local_gdbinit_loaded
= 1;
1069 catch_command_errors (source_script
, local_gdbinit
, 0);
1073 /* Now that all .gdbinit's have been read and all -d options have been
1074 processed, we can read any scripts mentioned in SYMARG.
1075 We wait until now because it is common to add to the source search
1076 path in local_gdbinit. */
1077 global_auto_load
= save_auto_load
;
1078 ALL_OBJFILES (objfile
)
1079 load_auto_scripts_for_objfile (objfile
);
1081 /* Process '-x' and '-ex' options. */
1082 for (i
= 0; i
< cmdarg_vec
.size (); i
++)
1084 const struct cmdarg
&cmdarg_p
= cmdarg_vec
[i
];
1086 switch (cmdarg_p
.type
)
1089 catch_command_errors (source_script
, cmdarg_p
.string
,
1092 case CMDARG_COMMAND
:
1093 catch_command_errors (execute_command
, cmdarg_p
.string
,
1099 /* Read in the old history after all the command files have been
1105 /* We have hit the end of the batch file. */
1106 quit_force (NULL
, 0);
1111 captured_main (void *data
)
1113 struct captured_main_args
*context
= (struct captured_main_args
*) data
;
1115 captured_main_1 (context
);
1117 /* NOTE: cagney/1999-11-07: There is probably no reason for not
1118 moving this loop and the code found in captured_command_loop()
1119 into the command_loop() proper. The main thing holding back that
1120 change - SET_TOP_LEVEL() - has been eliminated. */
1125 captured_command_loop ();
1127 CATCH (ex
, RETURN_MASK_ALL
)
1129 exception_print (gdb_stderr
, ex
);
1133 /* No exit -- exit is through quit_command. */
1137 gdb_main (struct captured_main_args
*args
)
1141 captured_main (args
);
1143 CATCH (ex
, RETURN_MASK_ALL
)
1145 exception_print (gdb_stderr
, ex
);
1149 /* The only way to end up here is by an error (normal exit is
1150 handled by quit_force()), hence always return an error status. */
1155 /* Don't use *_filtered for printing help. We don't want to prompt
1156 for continue no matter how small the screen or how much we're going
1160 print_gdb_help (struct ui_file
*stream
)
1162 const char *system_gdbinit
;
1163 const char *home_gdbinit
;
1164 const char *local_gdbinit
;
1166 get_init_files (&system_gdbinit
, &home_gdbinit
, &local_gdbinit
);
1168 /* Note: The options in the list below are only approximately sorted
1169 in the alphabetical order, so as to group closely related options
1171 fputs_unfiltered (_("\
1172 This is the GNU debugger. Usage:\n\n\
1173 gdb [options] [executable-file [core-file or process-id]]\n\
1174 gdb [options] --args executable-file [inferior-arguments ...]\n\n\
1176 fputs_unfiltered (_("\
1177 Selection of debuggee and its files:\n\n\
1178 --args Arguments after executable-file are passed to inferior\n\
1179 --core=COREFILE Analyze the core dump COREFILE.\n\
1180 --exec=EXECFILE Use EXECFILE as the executable.\n\
1181 --pid=PID Attach to running process PID.\n\
1182 --directory=DIR Search for source files in DIR.\n\
1183 --se=FILE Use FILE as symbol file and executable file.\n\
1184 --symbols=SYMFILE Read symbols from SYMFILE.\n\
1185 --readnow Fully read symbol files on first access.\n\
1186 --write Set writing into executable and core files.\n\n\
1188 fputs_unfiltered (_("\
1189 Initial commands and command files:\n\n\
1190 --command=FILE, -x Execute GDB commands from FILE.\n\
1191 --init-command=FILE, -ix\n\
1192 Like -x but execute commands before loading inferior.\n\
1193 --eval-command=COMMAND, -ex\n\
1194 Execute a single GDB command.\n\
1195 May be used multiple times and in conjunction\n\
1197 --init-eval-command=COMMAND, -iex\n\
1198 Like -ex but before loading inferior.\n\
1199 --nh Do not read ~/.gdbinit.\n\
1200 --nx Do not read any .gdbinit files in any directory.\n\n\
1202 fputs_unfiltered (_("\
1203 Output and user interface control:\n\n\
1204 --fullname Output information used by emacs-GDB interface.\n\
1205 --interpreter=INTERP\n\
1206 Select a specific interpreter / user interface\n\
1207 --tty=TTY Use TTY for input/output by the program being debugged.\n\
1208 -w Use the GUI interface.\n\
1209 --nw Do not use the GUI interface.\n\
1212 fputs_unfiltered (_("\
1213 --tui Use a terminal user interface.\n\
1216 fputs_unfiltered (_("\
1217 --dbx DBX compatibility mode.\n\
1218 -q, --quiet, --silent\n\
1219 Do not print version number on startup.\n\n\
1221 fputs_unfiltered (_("\
1222 Operating modes:\n\n\
1223 --batch Exit after processing options.\n\
1224 --batch-silent Like --batch, but suppress all gdb stdout output.\n\
1225 --return-child-result\n\
1226 GDB exit code will be the child's exit code.\n\
1227 --configuration Print details about GDB configuration and then exit.\n\
1228 --help Print this message and then exit.\n\
1229 --version Print version information and then exit.\n\n\
1230 Remote debugging options:\n\n\
1231 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
1232 -l TIMEOUT Set timeout in seconds for remote debugging.\n\n\
1234 --cd=DIR Change current directory to DIR.\n\
1235 --data-directory=DIR, -D\n\
1236 Set GDB's data-directory to DIR.\n\
1238 fputs_unfiltered (_("\n\
1239 At startup, GDB reads the following init files and executes their commands:\n\
1242 fprintf_unfiltered (stream
, _("\
1243 * system-wide init file: %s\n\
1244 "), system_gdbinit
);
1246 fprintf_unfiltered (stream
, _("\
1247 * user-specific init file: %s\n\
1250 fprintf_unfiltered (stream
, _("\
1251 * local init file (see also 'set auto-load local-gdbinit'): ./%s\n\
1253 fputs_unfiltered (_("\n\
1254 For more information, type \"help\" from within GDB, or consult the\n\
1255 GDB manual (available as on-line info or a printed manual).\n\
1257 if (REPORT_BUGS_TO
[0] && stream
== gdb_stdout
)
1258 fprintf_unfiltered (stream
, _("\
1259 Report bugs to \"%s\".\n\
1260 "), REPORT_BUGS_TO
);