[PATCH v2 11/36] Guile extension language: scm-auto-load.c

[Doug Evans <xdje42 at gmail dot com>]

This patch adds Guile auto-load support.

2014-01-20  Doug Evans  <xdje42@gmail.com>

	* guile/scm-auto-load.c: New file.

diff --git a/gdb/guile/scm-auto-load.c b/gdb/guile/scm-auto-load.c
new file mode 100644
index 0000000..5b9eb23
--- /dev/null
+++ b/gdb/guile/scm-auto-load.c
@@ -0,0 +1,81 @@
+/* GDB routines for supporting auto-loaded Guile scripts.
+
+   Copyright (C) 2010-2014 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "defs.h"
+#include <string.h>
+#include "top.h"
+#include "exceptions.h"
+#include "gdbcmd.h"
+#include "objfiles.h"
+#include "cli/cli-cmds.h"
+#include "auto-load.h"
+#include "guile.h"
+#include "guile-internal.h"
+
+/* User-settable option to enable/disable auto-loading of Guile scripts:
+   set auto-load guile-scripts on|off
+   This is true if we should auto-load associated Guile scripts when an
+   objfile is opened, false otherwise.  */
+static int auto_load_guile_scripts = 1;
+
+/* "show" command for the auto_load_guile_scripts configuration variable.  */
+
+static void
+show_auto_load_guile_scripts (struct ui_file *file, int from_tty,
+			      struct cmd_list_element *c, const char *value)
+{
+  fprintf_filtered (file, _("Auto-loading of Guile scripts is %s.\n"), value);
+}
+
+/* Return non-zero if auto-loading Guile scripts is enabled.
+   This is the extension_language_script_ops.auto_load_enabled "method".  */
+
+int
+gdbscm_auto_load_enabled (const struct extension_language_defn *extlang)
+{
+  return auto_load_guile_scripts;
+}
+
+/* Wrapper for "info auto-load guile-scripts".  */
+
+static void
+info_auto_load_guile_scripts (char *pattern, int from_tty)
+{
+  auto_load_info_scripts (pattern, from_tty, &extension_language_guile);
+}
+
+void
+gdbscm_initialize_auto_load (void)
+{
+  add_setshow_boolean_cmd ("guile-scripts", class_support,
+			   &auto_load_guile_scripts, _("\
+Set the debugger's behaviour regarding auto-loaded Guile scripts."), _("\
+Show the debugger's behaviour regarding auto-loaded Guile scripts."), _("\
+If enabled, auto-loaded Guile scripts are loaded when the debugger reads\n\
+an executable or shared library.\n\
+This options has security implications for untrusted inferiors."),
+			   NULL, show_auto_load_guile_scripts,
+			   auto_load_set_cmdlist_get (),
+			   auto_load_show_cmdlist_get ());
+
+  add_cmd ("guile-scripts", class_info, info_auto_load_guile_scripts,
+	   _("Print the list of automatically loaded Guile scripts.\n\
+Usage: info auto-load guile-scripts [REGEXP]"),
+	   auto_load_info_cmdlist_get ());
+}