1 /* General GDB/Guile code.
3 Copyright (C) 2014-2016 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/>. */
20 /* See README file in this directory for implementation notes, coding
21 conventions, et.al. */
24 #include "breakpoint.h"
25 #include "cli/cli-cmds.h"
26 #include "cli/cli-script.h"
27 #include "cli/cli-utils.h"
31 #include "extension-priv.h"
36 #include "guile-internal.h"
40 /* The Guile version we're using.
41 We *could* use the macros in libguile/version.h but that would preclude
42 handling the user switching in a different version with, e.g.,
43 LD_LIBRARY_PATH (using a different version than what gdb was compiled with
44 is not something to be done lightly, but can be useful). */
45 int gdbscm_guile_major_version
;
46 int gdbscm_guile_minor_version
;
47 int gdbscm_guile_micro_version
;
49 /* The guile subdirectory within gdb's data-directory. */
50 static const char *guile_datadir
;
52 /* Declared constants and enum for guile exception printing. */
53 const char gdbscm_print_excp_none
[] = "none";
54 const char gdbscm_print_excp_full
[] = "full";
55 const char gdbscm_print_excp_message
[] = "message";
57 /* "set guile print-stack" choices. */
58 static const char *const guile_print_excp_enums
[] =
60 gdbscm_print_excp_none
,
61 gdbscm_print_excp_full
,
62 gdbscm_print_excp_message
,
66 /* The exception printing variable. 'full' if we want to print the
67 error message and stack, 'none' if we want to print nothing, and
68 'message' if we only want to print the error message. 'message' is
70 const char *gdbscm_print_excp
= gdbscm_print_excp_message
;
73 /* Forward decls, these are defined later. */
74 extern const struct extension_language_script_ops guile_extension_script_ops
;
75 extern const struct extension_language_ops guile_extension_ops
;
78 /* The main struct describing GDB's interface to the Guile
79 extension language. */
80 EXPORTED_CONST
struct extension_language_defn extension_language_guile
=
92 &guile_extension_script_ops
,
102 static void gdbscm_finish_initialization
103 (const struct extension_language_defn
*);
104 static int gdbscm_initialized (const struct extension_language_defn
*);
105 static void gdbscm_eval_from_control_command
106 (const struct extension_language_defn
*, struct command_line
*);
107 static script_sourcer_func gdbscm_source_script
;
109 int gdb_scheme_initialized
;
111 /* Symbol for setting documentation strings. */
112 SCM gdbscm_documentation_symbol
;
114 /* Keywords used by various functions. */
115 static SCM from_tty_keyword
;
116 static SCM to_string_keyword
;
118 /* The name of the various modules (without the surrounding parens). */
119 const char gdbscm_module_name
[] = "gdb";
120 const char gdbscm_init_module_name
[] = "gdb";
122 /* The name of the bootstrap file. */
123 static const char boot_scm_filename
[] = "boot.scm";
125 /* The interface between gdb proper and loading of python scripts. */
127 const struct extension_language_script_ops guile_extension_script_ops
=
129 gdbscm_source_script
,
130 gdbscm_source_objfile_script
,
131 gdbscm_execute_objfile_script
,
132 gdbscm_auto_load_enabled
135 /* The interface between gdb proper and guile scripting. */
137 const struct extension_language_ops guile_extension_ops
=
139 gdbscm_finish_initialization
,
142 gdbscm_eval_from_control_command
,
144 NULL
, /* gdbscm_start_type_printers, */
145 NULL
, /* gdbscm_apply_type_printers, */
146 NULL
, /* gdbscm_free_type_printers, */
148 gdbscm_apply_val_pretty_printer
,
150 NULL
, /* gdbscm_apply_frame_filter, */
152 gdbscm_preserve_values
,
154 gdbscm_breakpoint_has_cond
,
155 gdbscm_breakpoint_cond_says_stop
,
157 NULL
, /* gdbscm_check_quit_flag, */
158 NULL
, /* gdbscm_set_quit_flag, */
161 /* Implementation of the gdb "guile-repl" command. */
164 guile_repl_command (char *arg
, int from_tty
)
166 struct cleanup
*cleanup
;
168 cleanup
= make_cleanup_restore_integer (&interpreter_async
);
169 interpreter_async
= 0;
171 arg
= skip_spaces (arg
);
173 /* This explicitly rejects any arguments for now.
174 "It is easier to relax a restriction than impose one after the fact."
175 We would *like* to be able to pass arguments to the interactive shell
176 but that's not what python-interactive does. Until there is time to
177 sort it out, we forbid arguments. */
180 error (_("guile-repl currently does not take any arguments."));
184 gdbscm_enter_repl ();
187 do_cleanups (cleanup
);
190 /* Implementation of the gdb "guile" command.
191 Note: Contrary to the Python version this displays the result.
192 Have to see which is better.
194 TODO: Add the result to Guile's history? */
197 guile_command (char *arg
, int from_tty
)
199 struct cleanup
*cleanup
;
201 cleanup
= make_cleanup_restore_integer (&interpreter_async
);
202 interpreter_async
= 0;
204 arg
= skip_spaces (arg
);
208 char *msg
= gdbscm_safe_eval_string (arg
, 1);
212 make_cleanup (xfree
, msg
);
218 struct command_line
*l
= get_command_line (guile_control
, "");
220 make_cleanup_free_command_lines (&l
);
221 execute_control_command_untraced (l
);
224 do_cleanups (cleanup
);
227 /* Given a command_line, return a command string suitable for passing
228 to Guile. Lines in the string are separated by newlines. The return
229 value is allocated using xmalloc and the caller is responsible for
233 compute_scheme_string (struct command_line
*l
)
235 struct command_line
*iter
;
240 for (iter
= l
; iter
; iter
= iter
->next
)
241 size
+= strlen (iter
->line
) + 1;
243 script
= (char *) xmalloc (size
+ 1);
245 for (iter
= l
; iter
; iter
= iter
->next
)
247 int len
= strlen (iter
->line
);
249 strcpy (&script
[here
], iter
->line
);
251 script
[here
++] = '\n';
257 /* Take a command line structure representing a "guile" command, and
258 evaluate its body using the Guile interpreter.
259 This is the extension_language_ops.eval_from_control_command "method". */
262 gdbscm_eval_from_control_command
263 (const struct extension_language_defn
*extlang
, struct command_line
*cmd
)
266 struct cleanup
*cleanup
;
268 if (cmd
->body_count
!= 1)
269 error (_("Invalid \"guile\" block structure."));
271 cleanup
= make_cleanup (null_cleanup
, NULL
);
273 script
= compute_scheme_string (cmd
->body_list
[0]);
274 msg
= gdbscm_safe_eval_string (script
, 0);
278 make_cleanup (xfree
, msg
);
282 do_cleanups (cleanup
);
285 /* Read a file as Scheme code.
286 This is the extension_language_script_ops.script_sourcer "method".
287 FILE is the file to run. FILENAME is name of the file FILE.
288 This does not throw any errors. If an exception occurs an error message
292 gdbscm_source_script (const struct extension_language_defn
*extlang
,
293 FILE *file
, const char *filename
)
295 char *msg
= gdbscm_safe_source_script (filename
);
299 fprintf_filtered (gdb_stderr
, "%s\n", msg
);
304 /* (execute string [#:from-tty boolean] [#:to-string boolean])
305 A Scheme function which evaluates a string using the gdb CLI. */
308 gdbscm_execute_gdb_command (SCM command_scm
, SCM rest
)
310 int from_tty_arg_pos
= -1, to_string_arg_pos
= -1;
311 int from_tty
= 0, to_string
= 0;
312 const SCM keywords
[] = { from_tty_keyword
, to_string_keyword
, SCM_BOOL_F
};
315 struct cleanup
*cleanups
;
316 struct gdb_exception except
= exception_none
;
318 gdbscm_parse_function_args (FUNC_NAME
, SCM_ARG1
, keywords
, "s#tt",
319 command_scm
, &command
, rest
,
320 &from_tty_arg_pos
, &from_tty
,
321 &to_string_arg_pos
, &to_string
);
323 /* Note: The contents of "command" may get modified while it is
325 cleanups
= make_cleanup (xfree
, command
);
329 struct cleanup
*inner_cleanups
;
331 inner_cleanups
= make_cleanup_restore_integer (&interpreter_async
);
332 interpreter_async
= 0;
334 prevent_dont_repeat ();
336 result
= execute_command_to_string (command
, from_tty
);
339 execute_command (command
, from_tty
);
343 /* Do any commands attached to breakpoint we stopped at. */
344 bpstat_do_actions ();
346 do_cleanups (inner_cleanups
);
348 CATCH (ex
, RETURN_MASK_ALL
)
354 do_cleanups (cleanups
);
355 GDBSCM_HANDLE_GDB_EXCEPTION (except
);
359 SCM r
= gdbscm_scm_from_c_string (result
);
363 return SCM_UNSPECIFIED
;
366 /* (data-directory) -> string */
369 gdbscm_data_directory (void)
371 return gdbscm_scm_from_c_string (gdb_datadir
);
374 /* (guile-data-directory) -> string */
377 gdbscm_guile_data_directory (void)
379 return gdbscm_scm_from_c_string (guile_datadir
);
382 /* (gdb-version) -> string */
385 gdbscm_gdb_version (void)
387 return gdbscm_scm_from_c_string (version
);
390 /* (host-config) -> string */
393 gdbscm_host_config (void)
395 return gdbscm_scm_from_c_string (host_name
);
398 /* (target-config) -> string */
401 gdbscm_target_config (void)
403 return gdbscm_scm_from_c_string (target_name
);
406 #else /* ! HAVE_GUILE */
408 /* Dummy implementation of the gdb "guile-repl" and "guile"
412 guile_repl_command (char *arg
, int from_tty
)
414 arg
= skip_spaces (arg
);
416 error (_("guile-repl currently does not take any arguments."));
417 error (_("Guile scripting is not supported in this copy of GDB."));
421 guile_command (char *arg
, int from_tty
)
423 arg
= skip_spaces (arg
);
425 error (_("Guile scripting is not supported in this copy of GDB."));
428 /* Even if Guile isn't enabled, we still have to slurp the
429 command list to the corresponding "end". */
430 struct command_line
*l
= get_command_line (guile_control
, "");
431 struct cleanup
*cleanups
= make_cleanup_free_command_lines (&l
);
433 execute_control_command_untraced (l
);
434 do_cleanups (cleanups
);
438 #endif /* ! HAVE_GUILE */
440 /* Lists for 'set,show,info guile' commands. */
442 static struct cmd_list_element
*set_guile_list
;
443 static struct cmd_list_element
*show_guile_list
;
444 static struct cmd_list_element
*info_guile_list
;
446 /* Function for use by 'set guile' prefix command. */
449 set_guile_command (char *args
, int from_tty
)
451 help_list (set_guile_list
, "set guile ", all_commands
, gdb_stdout
);
454 /* Function for use by 'show guile' prefix command. */
457 show_guile_command (char *args
, int from_tty
)
459 cmd_show_list (show_guile_list
, from_tty
, "");
462 /* The "info scheme" command is defined as a prefix, with
463 allow_unknown 0. Therefore, its own definition is called only for
464 "info scheme" with no args. */
467 info_guile_command (char *args
, int from_tty
)
469 printf_unfiltered (_("\"info guile\" must be followed"
470 " by the name of an info command.\n"));
471 help_list (info_guile_list
, "info guile ", all_commands
, gdb_stdout
);
474 /* Initialization. */
478 static const scheme_function misc_guile_functions
[] =
480 { "execute", 1, 0, 1, as_a_scm_t_subr (gdbscm_execute_gdb_command
),
482 Execute the given GDB command.\n\
484 Arguments: string [#:to-string boolean] [#:from-tty boolean]\n\
485 If #:from-tty is true then the command executes as if entered\n\
486 from the keyboard. The default is false (#f).\n\
487 If #:to-string is true then the result is returned as a string.\n\
488 Otherwise output is sent to the current output port,\n\
489 which is the default.\n\
490 Returns: The result of the command if #:to-string is true.\n\
491 Otherwise returns unspecified." },
493 { "data-directory", 0, 0, 0, as_a_scm_t_subr (gdbscm_data_directory
),
495 Return the name of GDB's data directory." },
497 { "guile-data-directory", 0, 0, 0,
498 as_a_scm_t_subr (gdbscm_guile_data_directory
),
500 Return the name of the Guile directory within GDB's data directory." },
502 { "gdb-version", 0, 0, 0, as_a_scm_t_subr (gdbscm_gdb_version
),
504 Return GDB's version string." },
506 { "host-config", 0, 0, 0, as_a_scm_t_subr (gdbscm_host_config
),
508 Return the name of the host configuration." },
510 { "target-config", 0, 0, 0, as_a_scm_t_subr (gdbscm_target_config
),
512 Return the name of the target configuration." },
517 /* Load BOOT_SCM_FILE, the first Scheme file that gets loaded. */
520 boot_guile_support (void *boot_scm_file
)
522 /* Load boot.scm without compiling it (there's no need to compile it).
523 The other files should have been compiled already, and boot.scm is
524 expected to adjust '%load-compiled-path' accordingly. If they haven't
525 been compiled, Guile will auto-compile them. The important thing to keep
526 in mind is that there's a >= 100x speed difference between compiled and
527 non-compiled files. */
528 return scm_c_primitive_load ((const char *) boot_scm_file
);
531 /* Return non-zero if ARGS has the "standard" format for throw args.
532 The standard format is:
533 (function format-string (format-string-args-list) ...).
534 FUNCTION is #f if no function was recorded. */
537 standard_throw_args_p (SCM args
)
539 if (gdbscm_is_true (scm_list_p (args
))
540 && scm_ilength (args
) >= 3)
542 /* The function in which the error occurred. */
543 SCM arg0
= scm_list_ref (args
, scm_from_int (0));
544 /* The format string. */
545 SCM arg1
= scm_list_ref (args
, scm_from_int (1));
546 /* The arguments of the format string. */
547 SCM arg2
= scm_list_ref (args
, scm_from_int (2));
549 if ((scm_is_string (arg0
) || gdbscm_is_false (arg0
))
550 && scm_is_string (arg1
)
551 && gdbscm_is_true (scm_list_p (arg2
)))
558 /* Print the error recorded in a "standard" throw args. */
561 print_standard_throw_error (SCM args
)
563 /* The function in which the error occurred. */
564 SCM arg0
= scm_list_ref (args
, scm_from_int (0));
565 /* The format string. */
566 SCM arg1
= scm_list_ref (args
, scm_from_int (1));
567 /* The arguments of the format string. */
568 SCM arg2
= scm_list_ref (args
, scm_from_int (2));
570 /* ARG0 is #f if no function was recorded. */
571 if (gdbscm_is_true (arg0
))
573 scm_simple_format (scm_current_error_port (),
574 scm_from_latin1_string (_("Error in function ~s:~%")),
577 scm_simple_format (scm_current_error_port (), arg1
, arg2
);
580 /* Print the error message recorded in KEY, ARGS, the arguments to throw.
581 Normally we let Scheme print the error message.
582 This function is used when Scheme initialization fails.
583 We can still use the Scheme C API though. */
586 print_throw_error (SCM key
, SCM args
)
588 /* IWBN to call gdbscm_print_exception_with_stack here, but Guile didn't
589 boot successfully so play it safe and avoid it. The "format string" and
590 its args are embedded in ARGS, but the content of ARGS depends on KEY.
591 Make sure ARGS has the expected canonical content before trying to use
593 if (standard_throw_args_p (args
))
594 print_standard_throw_error (args
);
597 scm_simple_format (scm_current_error_port (),
598 scm_from_latin1_string (_("Throw to key `~a' with args `~s'.~%")),
599 scm_list_2 (key
, args
));
603 /* Handle an exception thrown while loading BOOT_SCM_FILE. */
606 handle_boot_error (void *boot_scm_file
, SCM key
, SCM args
)
608 fprintf_unfiltered (gdb_stderr
, ("Exception caught while booting Guile.\n"));
610 print_throw_error (key
, args
);
612 fprintf_unfiltered (gdb_stderr
, "\n");
613 warning (_("Could not complete Guile gdb module initialization from:\n"
615 "Limited Guile support is available.\n"
616 "Suggest passing --data-directory=/path/to/gdb/data-directory.\n"),
617 (const char *) boot_scm_file
);
619 return SCM_UNSPECIFIED
;
622 /* Load gdb/boot.scm, the Scheme side of GDB/Guile support.
623 Note: This function assumes it's called within the gdb module. */
626 initialize_scheme_side (void)
631 guile_datadir
= concat (gdb_datadir
, SLASH_STRING
, "guile", (char *) NULL
);
632 boot_scm_path
= concat (guile_datadir
, SLASH_STRING
, "gdb",
633 SLASH_STRING
, boot_scm_filename
, (char *) NULL
);
635 scm_c_catch (SCM_BOOL_T
, boot_guile_support
, boot_scm_path
,
636 handle_boot_error
, boot_scm_path
, NULL
, NULL
);
638 xfree (boot_scm_path
);
641 /* Install the gdb scheme module.
642 The result is a boolean indicating success.
643 If initializing the gdb module fails an error message is printed.
644 Note: This function runs in the context of the gdb module. */
647 initialize_gdb_module (void *data
)
649 /* Computing these is a pain, so only do it once.
650 Also, do it here and save the result so that obtaining the values
652 gdbscm_guile_major_version
= gdbscm_scm_string_to_int (scm_major_version ());
653 gdbscm_guile_minor_version
= gdbscm_scm_string_to_int (scm_minor_version ());
654 gdbscm_guile_micro_version
= gdbscm_scm_string_to_int (scm_micro_version ());
656 /* The documentation symbol needs to be defined before any calls to
657 gdbscm_define_{variables,functions}. */
658 gdbscm_documentation_symbol
= scm_from_latin1_symbol ("documentation");
660 /* The smob and exception support must be initialized early. */
661 gdbscm_initialize_smobs ();
662 gdbscm_initialize_exceptions ();
664 /* The rest are initialized in alphabetical order. */
665 gdbscm_initialize_arches ();
666 gdbscm_initialize_auto_load ();
667 gdbscm_initialize_blocks ();
668 gdbscm_initialize_breakpoints ();
669 gdbscm_initialize_commands ();
670 gdbscm_initialize_disasm ();
671 gdbscm_initialize_frames ();
672 gdbscm_initialize_iterators ();
673 gdbscm_initialize_lazy_strings ();
674 gdbscm_initialize_math ();
675 gdbscm_initialize_objfiles ();
676 gdbscm_initialize_parameters ();
677 gdbscm_initialize_ports ();
678 gdbscm_initialize_pretty_printers ();
679 gdbscm_initialize_pspaces ();
680 gdbscm_initialize_strings ();
681 gdbscm_initialize_symbols ();
682 gdbscm_initialize_symtabs ();
683 gdbscm_initialize_types ();
684 gdbscm_initialize_values ();
686 gdbscm_define_functions (misc_guile_functions
, 1);
688 from_tty_keyword
= scm_from_latin1_keyword ("from-tty");
689 to_string_keyword
= scm_from_latin1_keyword ("to-string");
691 initialize_scheme_side ();
693 gdb_scheme_initialized
= 1;
696 /* Utility to call scm_c_define_module+initialize_gdb_module from
697 within scm_with_guile. */
700 call_initialize_gdb_module (void *data
)
702 /* Most of the initialization is done by initialize_gdb_module.
703 It is called via scm_c_define_module so that the initialization is
704 performed within the desired module. */
705 scm_c_define_module (gdbscm_module_name
, initialize_gdb_module
, NULL
);
707 #if HAVE_GUILE_MANUAL_FINALIZATION
708 scm_run_finalizers ();
714 /* A callback to finish Guile initialization after gdb has finished all its
716 This is the extension_language_ops.finish_initialization "method". */
719 gdbscm_finish_initialization (const struct extension_language_defn
*extlang
)
721 /* Restore the environment to the user interaction one. */
722 scm_set_current_module (scm_interaction_environment ());
725 /* The extension_language_ops.initialized "method". */
728 gdbscm_initialized (const struct extension_language_defn
*extlang
)
730 return gdb_scheme_initialized
;
733 /* Enable or disable Guile backtraces. */
736 gdbscm_set_backtrace (int enable
)
738 static const char disable_bt
[] = "(debug-disable 'backtrace)";
739 static const char enable_bt
[] = "(debug-enable 'backtrace)";
742 gdbscm_safe_eval_string (enable_bt
, 0);
744 gdbscm_safe_eval_string (disable_bt
, 0);
747 #endif /* HAVE_GUILE */
749 /* Install the various gdb commands used by Guile. */
752 install_gdb_commands (void)
754 add_com ("guile-repl", class_obscure
,
758 Start an interactive Guile prompt.\n\
760 To return to GDB, type the EOF character (e.g., Ctrl-D on an empty\n\
762 #else /* HAVE_GUILE */
764 Start a Guile interactive prompt.\n\
766 Guile scripting is not supported in this copy of GDB.\n\
767 This command is only a placeholder.")
768 #endif /* HAVE_GUILE */
770 add_com_alias ("gr", "guile-repl", class_obscure
, 1);
772 /* Since "help guile" is easy to type, and intuitive, we add general help
773 in using GDB+Guile to this command. */
774 add_com ("guile", class_obscure
, guile_command
,
777 Evaluate one or more Guile expressions.\n\
779 The expression(s) can be given as an argument, for instance:\n\
781 guile (display 23)\n\
783 The result of evaluating the last expression is printed.\n\
785 If no argument is given, the following lines are read and passed\n\
786 to Guile for evaluation. Type a line containing \"end\" to indicate\n\
787 the end of the set of expressions.\n\
789 The Guile GDB module must first be imported before it can be used.\n\
791 (gdb) guile (use-modules (gdb))\n\
792 or if you want to import the (gdb) module with a prefix, use:\n\
793 (gdb) guile (use-modules ((gdb) #:renamer (symbol-prefix-proc 'gdb:)))\n\
795 The Guile interactive session, started with the \"guile-repl\"\n\
796 command, provides extensive help and apropos capabilities.\n\
797 Type \",help\" once in a Guile interactive session.")
798 #else /* HAVE_GUILE */
800 Evaluate a Guile expression.\n\
802 Guile scripting is not supported in this copy of GDB.\n\
803 This command is only a placeholder.")
804 #endif /* HAVE_GUILE */
806 add_com_alias ("gu", "guile", class_obscure
, 1);
808 add_prefix_cmd ("guile", class_obscure
, set_guile_command
,
809 _("Prefix command for Guile preference settings."),
810 &set_guile_list
, "set guile ", 0,
812 add_alias_cmd ("gu", "guile", class_obscure
, 1, &setlist
);
814 add_prefix_cmd ("guile", class_obscure
, show_guile_command
,
815 _("Prefix command for Guile preference settings."),
816 &show_guile_list
, "show guile ", 0,
818 add_alias_cmd ("gu", "guile", class_obscure
, 1, &showlist
);
820 add_prefix_cmd ("guile", class_obscure
, info_guile_command
,
821 _("Prefix command for Guile info displays."),
822 &info_guile_list
, "info guile ", 0,
824 add_info_alias ("gu", "guile", 1);
826 /* The name "print-stack" is carried over from Python.
827 A better name is "print-exception". */
828 add_setshow_enum_cmd ("print-stack", no_class
, guile_print_excp_enums
,
829 &gdbscm_print_excp
, _("\
830 Set mode for Guile exception printing on error."), _("\
831 Show the mode of Guile exception printing on error."), _("\
832 none == no stack or message will be printed.\n\
833 full == a message and a stack will be printed.\n\
834 message == an error message without a stack will be printed."),
836 &set_guile_list
, &show_guile_list
);
839 /* Provide a prototype to silence -Wmissing-prototypes. */
840 extern initialize_file_ftype _initialize_guile
;
843 _initialize_guile (void)
845 install_gdb_commands ();
849 #ifdef HAVE_SIGPROCMASK
850 sigset_t sigchld_mask
, prev_mask
;
853 /* The Python support puts the C side in module "_gdb", leaving the Python
854 side to define module "gdb" which imports "_gdb". There is evidently no
855 similar convention in Guile so we skip this. */
857 #if HAVE_GUILE_MANUAL_FINALIZATION
858 /* Our SMOB free functions are not thread-safe, as GDB itself is not
859 intended to be thread-safe. Disable automatic finalization so that
860 finalizers aren't run in other threads. */
861 scm_set_automatic_finalization_enabled (0);
864 #ifdef HAVE_SIGPROCMASK
865 /* Before we initialize Guile, block SIGCHLD.
866 This is done so that all threads created during Guile initialization
867 have SIGCHLD blocked. PR 17247.
868 Really libgc and Guile should do this, but we need to work with
870 sigemptyset (&sigchld_mask
);
871 sigaddset (&sigchld_mask
, SIGCHLD
);
872 sigprocmask (SIG_BLOCK
, &sigchld_mask
, &prev_mask
);
875 /* scm_with_guile is the most portable way to initialize Guile.
876 Plus we need to initialize the Guile support while in Guile mode
877 (e.g., called from within a call to scm_with_guile). */
878 scm_with_guile (call_initialize_gdb_module
, NULL
);
880 #ifdef HAVE_SIGPROCMASK
881 sigprocmask (SIG_SETMASK
, &prev_mask
, NULL
);
884 /* Set Guile's backtrace to match the "set guile print-stack" default.
885 [N.B. The two settings are still separate.]
886 But only do this after we've initialized Guile, it's nice to see a
887 backtrace if there's an error during initialization.
888 OTOH, if the error is that gdb/init.scm wasn't found because gdb is
889 being run from the build tree, the backtrace is more noise than signal.
891 gdbscm_set_backtrace (0);