Merge GDB 7.5.1

gdb/auto-load.c

+/* GDB routines for supporting auto-loaded scripts.
+
+   Copyright (C) 2012 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 "auto-load.h"
+#include "progspace.h"
+#include "python/python.h"
+#include "gdb_regex.h"
+#include "ui-out.h"
+#include "filenames.h"
+#include "command.h"
+#include "observer.h"
+#include "objfiles.h"
+#include "exceptions.h"
+#include "cli/cli-script.h"
+#include "gdbcmd.h"
+#include "cli/cli-decode.h"
+#include "cli/cli-setshow.h"
+#include "gdb_vecs.h"
+#include "readline/tilde.h"
+#include "completer.h"
+#include "observer.h"
+#include "fnmatch.h"
+#include "top.h"
+
+/* The suffix of per-objfile scripts to auto-load as non-Python command files.
+   E.g. When the program loads libfoo.so, look for libfoo-gdb.gdb.  */
+#define GDB_AUTO_FILE_NAME "-gdb.gdb"
+
+static void source_gdb_script_for_objfile (struct objfile *objfile, FILE *file,
+                                           const char *filename);
+
+/* Value of the 'set debug auto-load' configuration variable.  */
+static int debug_auto_load = 0;
+
+/* "show" command for the debug_auto_load configuration variable.  */
+
+static void
+show_debug_auto_load (struct ui_file *file, int from_tty,
+                      struct cmd_list_element *c, const char *value)
+{
+  fprintf_filtered (file, _("Debugging output for files "
+                            "of 'set auto-load ...' is %s.\n"),
+                    value);
+}
+
+/* User-settable option to enable/disable auto-loading of GDB_AUTO_FILE_NAME
+   scripts:
+   set auto-load gdb-scripts on|off
+   This is true if we should auto-load associated scripts when an objfile
+   is opened, false otherwise.  */
+static int auto_load_gdb_scripts = 1;
+
+/* "show" command for the auto_load_gdb_scripts configuration variable.  */
+
+static void
+show_auto_load_gdb_scripts (struct ui_file *file, int from_tty,
+                            struct cmd_list_element *c, const char *value)
+{
+  fprintf_filtered (file, _("Auto-loading of canned sequences of commands "
+                            "scripts is %s.\n"),
+                    value);
+}
+
+/* Internal-use flag to enable/disable auto-loading.
+   This is true if we should auto-load python code when an objfile is opened,
+   false otherwise.
+
+   Both auto_load_scripts && global_auto_load must be true to enable
+   auto-loading.
+
+   This flag exists to facilitate deferring auto-loading during start-up
+   until after ./.gdbinit has been read; it may augment the search directories
+   used to find the scripts.  */
+int global_auto_load = 1;
+
+/* Auto-load .gdbinit file from the current directory?  */
+int auto_load_local_gdbinit = 1;
+
+/* Absolute pathname to the current directory .gdbinit, if it exists.  */
+char *auto_load_local_gdbinit_pathname = NULL;
+
+/* Boolean value if AUTO_LOAD_LOCAL_GDBINIT_PATHNAME has been loaded.  */
+int auto_load_local_gdbinit_loaded = 0;
+
+/* "show" command for the auto_load_local_gdbinit configuration variable.  */
+
+static void
+show_auto_load_local_gdbinit (struct ui_file *file, int from_tty,
+                              struct cmd_list_element *c, const char *value)
+{
+  fprintf_filtered (file, _("Auto-loading of .gdbinit script from current "
+                            "directory is %s.\n"),
+                    value);
+}
+
+/* Directory list from which to load auto-loaded scripts.  It is not checked
+   for absolute paths but they are strongly recommended.  It is initialized by
+   _initialize_auto_load.  */
+static char *auto_load_dir;
+
+/* "set" command for the auto_load_dir configuration variable.  */
+
+static void
+set_auto_load_dir (char *args, int from_tty, struct cmd_list_element *c)
+{
+  /* Setting the variable to "" resets it to the compile time defaults.  */
+  if (auto_load_dir[0] == '\0')
+    {
+      xfree (auto_load_dir);
+      auto_load_dir = xstrdup (AUTO_LOAD_DIR);
+    }
+}
+
+/* "show" command for the auto_load_dir configuration variable.  */
+
+static void
+show_auto_load_dir (struct ui_file *file, int from_tty,
+                    struct cmd_list_element *c, const char *value)
+{
+  fprintf_filtered (file, _("List of directories from which to load "
+                            "auto-loaded scripts is %s.\n"),
+                    value);
+}
+
+/* Directory list safe to hold auto-loaded files.  It is not checked for
+   absolute paths but they are strongly recommended.  It is initialized by
+   _initialize_auto_load.  */
+static char *auto_load_safe_path;
+
+/* Vector of directory elements of AUTO_LOAD_SAFE_PATH with each one normalized
+   by tilde_expand and possibly each entries has added its gdb_realpath
+   counterpart.  */
+static VEC (char_ptr) *auto_load_safe_path_vec;
+
+/* Expand $datadir and $debugdir in STRING according to the rules of
+   substitute_path_component.  Return vector from dirnames_to_char_ptr_vec,
+   this vector must be freed by free_char_ptr_vec by the caller.  */
+
+static VEC (char_ptr) *
+auto_load_expand_dir_vars (const char *string)
+{
+  VEC (char_ptr) *dir_vec;
+  char *s;
+
+  s = xstrdup (string);
+  substitute_path_component (&s, "$datadir", gdb_datadir);
+  substitute_path_component (&s, "$debugdir", debug_file_directory);
+
+  if (debug_auto_load && strcmp (s, string) != 0)
+    fprintf_unfiltered (gdb_stdlog,
+                        _("auto-load: Expanded $-variables to \"%s\".\n"), s);
+
+  dir_vec = dirnames_to_char_ptr_vec (s);
+  xfree(s);
+
+  return dir_vec;
+}
+
+/* Update auto_load_safe_path_vec from current AUTO_LOAD_SAFE_PATH.  */
+
+static void
+auto_load_safe_path_vec_update (void)
+{
+  VEC (char_ptr) *dir_vec = NULL;
+  unsigned len;
+  int ix;
+
+  if (debug_auto_load)
+    fprintf_unfiltered (gdb_stdlog,
+                        _("auto-load: Updating directories of \"%s\".\n"),
+                        auto_load_safe_path);
+
+  free_char_ptr_vec (auto_load_safe_path_vec);
+
+  auto_load_safe_path_vec = auto_load_expand_dir_vars (auto_load_safe_path);
+  len = VEC_length (char_ptr, auto_load_safe_path_vec);
+
+  /* Apply tilde_expand and gdb_realpath to each AUTO_LOAD_SAFE_PATH_VEC
+     element.  */
+  for (ix = 0; ix < len; ix++)
+    {
+      char *dir = VEC_index (char_ptr, auto_load_safe_path_vec, ix);
+      char *expanded = tilde_expand (dir);
+      char *real_path = gdb_realpath (expanded);
+
+      /* Ensure the current entry is at least tilde_expand-ed.  */
+      VEC_replace (char_ptr, auto_load_safe_path_vec, ix, expanded);
+
+      if (debug_auto_load)
+        {
+          if (strcmp (expanded, dir) == 0)
+            fprintf_unfiltered (gdb_stdlog,
+                                _("auto-load: Using directory \"%s\".\n"),
+                                expanded);
+          else
+            fprintf_unfiltered (gdb_stdlog,
+                                _("auto-load: Resolved directory \"%s\" "
+                                  "as \"%s\".\n"),
+                                dir, expanded);
+        }
+      xfree (dir);
+
+      /* If gdb_realpath returns a different content, append it.  */
+      if (strcmp (real_path, expanded) == 0)
+        xfree (real_path);
+      else
+        {
+          VEC_safe_push (char_ptr, auto_load_safe_path_vec, real_path);
+
+          if (debug_auto_load)
+            fprintf_unfiltered (gdb_stdlog,
+                                _("auto-load: And canonicalized as \"%s\".\n"),
+                                real_path);
+        }
+    }
+}
+
+/* Variable gdb_datadir has been set.  Update content depending on $datadir.  */
+
+static void
+auto_load_gdb_datadir_changed (void)
+{
+  auto_load_safe_path_vec_update ();
+}
+
+/* "set" command for the auto_load_safe_path configuration variable.  */
+
+static void
+set_auto_load_safe_path (char *args, int from_tty, struct cmd_list_element *c)
+{
+  /* Setting the variable to "" resets it to the compile time defaults.  */
+  if (auto_load_safe_path[0] == '\0')
+    {
+      xfree (auto_load_safe_path);
+      auto_load_safe_path = xstrdup (AUTO_LOAD_SAFE_PATH);
+    }
+
+  auto_load_safe_path_vec_update ();
+}
+
+/* "show" command for the auto_load_safe_path configuration variable.  */
+
+static void
+show_auto_load_safe_path (struct ui_file *file, int from_tty,
+                          struct cmd_list_element *c, const char *value)
+{
+  const char *cs;
+
+  /* Check if user has entered either "/" or for example ":".
+     But while more complicate content like ":/foo" would still also
+     permit any location do not hide those.  */
+
+  for (cs = value; *cs && (*cs == DIRNAME_SEPARATOR || IS_DIR_SEPARATOR (*cs));
+       cs++);
+  if (*cs == 0)
+    fprintf_filtered (file, _("Auto-load files are safe to load from any "
+                              "directory.\n"));
+  else
+    fprintf_filtered (file, _("List of directories from which it is safe to "
+                              "auto-load files is %s.\n"),
+                      value);
+}
+
+/* "add-auto-load-safe-path" command for the auto_load_safe_path configuration
+   variable.  */
+
+static void
+add_auto_load_safe_path (char *args, int from_tty)
+{
+  char *s;
+
+  if (args == NULL || *args == 0)
+    error (_("\
+Directory argument required.\n\
+Use 'set auto-load safe-path /' for disabling the auto-load safe-path security.\
+"));
+
+  s = xstrprintf ("%s%c%s", auto_load_safe_path, DIRNAME_SEPARATOR, args);
+  xfree (auto_load_safe_path);
+  auto_load_safe_path = s;
+
+  auto_load_safe_path_vec_update ();
+}
+
+/* Implementation for filename_is_in_pattern overwriting the caller's FILENAME
+   and PATTERN.  */
+
+static int
+filename_is_in_pattern_1 (char *filename, char *pattern)
+{
+  size_t pattern_len = strlen (pattern);
+  size_t filename_len = strlen (filename);
+
+  if (debug_auto_load)
+    fprintf_unfiltered (gdb_stdlog, _("auto-load: Matching file \"%s\" "
+                                      "to pattern \"%s\"\n"),
+                        filename, pattern);
+
+  /* Trim trailing slashes ("/") from PATTERN.  Even for "d:\" paths as
+     trailing slashes are trimmed also from FILENAME it still matches
+     correctly.  */
+  while (pattern_len && IS_DIR_SEPARATOR (pattern[pattern_len - 1]))
+    pattern_len--;
+  pattern[pattern_len] = '\0';
+
+  /* Ensure auto_load_safe_path "/" matches any FILENAME.  On MS-Windows
+     platform FILENAME even after gdb_realpath does not have to start with
+     IS_DIR_SEPARATOR character, such as the 'C:\x.exe' filename.  */
+  if (pattern_len == 0)
+    {
+      if (debug_auto_load)
+        fprintf_unfiltered (gdb_stdlog,
+                            _("auto-load: Matched - empty pattern\n"));
+      return 1;
+    }
+
+  for (;;)
+    {
+      /* Trim trailing slashes ("/").  PATTERN also has slashes trimmed the
+         same way so they will match.  */
+      while (filename_len && IS_DIR_SEPARATOR (filename[filename_len - 1]))
+        filename_len--;
+      filename[filename_len] = '\0';
+      if (filename_len == 0)
+        {
+          if (debug_auto_load)
+            fprintf_unfiltered (gdb_stdlog,
+                                _("auto-load: Not matched - pattern \"%s\".\n"),
+                                pattern);
+          return 0;
+        }
+
+      if (gdb_filename_fnmatch (pattern, filename, FNM_FILE_NAME | FNM_NOESCAPE)
+          == 0)
+        {
+          if (debug_auto_load)
+            fprintf_unfiltered (gdb_stdlog, _("auto-load: Matched - file "
+                                              "\"%s\" to pattern \"%s\".\n"),
+                                filename, pattern);
+          return 1;
+        }
+
+      /* Trim trailing FILENAME component.  */
+      while (filename_len > 0 && !IS_DIR_SEPARATOR (filename[filename_len - 1]))
+        filename_len--;
+    }
+}
+
+/* Return 1 if FILENAME matches PATTERN or if FILENAME resides in
+   a subdirectory of a directory that matches PATTERN.  Return 0 otherwise.
+   gdb_realpath normalization is never done here.  */
+
+static ATTRIBUTE_PURE int
+filename_is_in_pattern (const char *filename, const char *pattern)
+{
+  char *filename_copy, *pattern_copy;
+
+  filename_copy = alloca (strlen (filename) + 1);
+  strcpy (filename_copy, filename);
+  pattern_copy = alloca (strlen (pattern) + 1);
+  strcpy (pattern_copy, pattern);
+
+  return filename_is_in_pattern_1 (filename_copy, pattern_copy);
+}
+
+/* Return 1 if FILENAME belongs to one of directory components of
+   AUTO_LOAD_SAFE_PATH_VEC.  Return 0 otherwise.
+   auto_load_safe_path_vec_update is never called.
+   *FILENAME_REALP may be updated by gdb_realpath of FILENAME - it has to be
+   freed by the caller.  */
+
+static int
+filename_is_in_auto_load_safe_path_vec (const char *filename,
+                                        char **filename_realp)
+{
+  char *pattern;
+  int ix;
+
+  for (ix = 0; VEC_iterate (char_ptr, auto_load_safe_path_vec, ix, pattern);
+       ++ix)
+    if (*filename_realp == NULL && filename_is_in_pattern (filename, pattern))
+      break;
+  
+  if (pattern == NULL)
+    {
+      if (*filename_realp == NULL)
+        {
+          *filename_realp = gdb_realpath (filename);
+          if (debug_auto_load && strcmp (*filename_realp, filename) != 0)
+            fprintf_unfiltered (gdb_stdlog,
+                                _("auto-load: Resolved "
+                                  "file \"%s\" as \"%s\".\n"),
+                                filename, *filename_realp);
+        }
+
+      if (strcmp (*filename_realp, filename) != 0)
+        for (ix = 0;
+             VEC_iterate (char_ptr, auto_load_safe_path_vec, ix, pattern); ++ix)
+          if (filename_is_in_pattern (*filename_realp, pattern))
+            break;
+    }
+
+  if (pattern != NULL)
+    {
+      if (debug_auto_load)
+        fprintf_unfiltered (gdb_stdlog, _("auto-load: File \"%s\" matches "
+                                          "directory \"%s\".\n"),
+                            filename, pattern);
+      return 1;
+    }
+
+  return 0;
+}
+
+/* Return 1 if FILENAME is located in one of the directories of
+   AUTO_LOAD_SAFE_PATH.  Otherwise call warning and return 0.  FILENAME does
+   not have to be an absolute path.
+
+   Existence of FILENAME is not checked.  Function will still give a warning
+   even if the caller would quietly skip non-existing file in unsafe
+   directory.  */
+
+int
+file_is_auto_load_safe (const char *filename, const char *debug_fmt, ...)
+{
+  char *filename_real = NULL;
+  struct cleanup *back_to;
+  static int advice_printed = 0;
+
+  if (debug_auto_load)
+    {
+      va_list debug_args;
+
+      va_start (debug_args, debug_fmt);
+      vfprintf_unfiltered (gdb_stdlog, debug_fmt, debug_args);
+      va_end (debug_args);
+    }
+
+  back_to = make_cleanup (free_current_contents, &filename_real);
+
+  if (filename_is_in_auto_load_safe_path_vec (filename, &filename_real))
+    {
+      do_cleanups (back_to);
+      return 1;
+    }
+
+  auto_load_safe_path_vec_update ();
+  if (filename_is_in_auto_load_safe_path_vec (filename, &filename_real))
+    {
+      do_cleanups (back_to);
+      return 1;
+    }
+
+  warning (_("File \"%s\" auto-loading has been declined by your "
+             "`auto-load safe-path' set to \"%s\"."),
+           filename_real, auto_load_safe_path);
+
+  if (!advice_printed)
+    {
+      const char *homedir = getenv ("HOME");
+      char *homeinit;
+
+      if (homedir == NULL)
+        homedir = "$HOME";
+      homeinit = xstrprintf ("%s/%s", homedir, gdbinit);
+      make_cleanup (xfree, homeinit);
+
+      printf_filtered (_("\
+To enable execution of this file add\n\
+\tadd-auto-load-safe-path %s\n\
+line to your configuration file \"%s\".\n\
+To completely disable this security protection add\n\
+\tset auto-load safe-path /\n\
+line to your configuration file \"%s\".\n\
+For more information about this security protection see the\n\
+\"Auto-loading safe path\" section in the GDB manual.  E.g., run from the shell:\n\
+\tinfo \"(gdb)Auto-loading safe path\"\n"),
+                       filename_real, homeinit, homeinit);
+      advice_printed = 1;
+    }
+
+  do_cleanups (back_to);
+  return 0;
+}
+
+/* Definition of script language for GDB canned sequences of commands.  */
+
+static const struct script_language script_language_gdb
+  = { GDB_AUTO_FILE_NAME, source_gdb_script_for_objfile };
+
+static void
+source_gdb_script_for_objfile (struct objfile *objfile, FILE *file,
+                               const char *filename)
+{
+  int is_safe;
+  struct auto_load_pspace_info *pspace_info;
+  volatile struct gdb_exception e;
+
+  is_safe = file_is_auto_load_safe (filename, _("auto-load: Loading canned "
+                                                "sequences of commands script "
+                                                "\"%s\" for objfile \"%s\".\n"),
+                                    filename, objfile->name);
+
+  /* Add this script to the hash table too so "info auto-load gdb-scripts"
+     can print it.  */
+  pspace_info = get_auto_load_pspace_data_for_loading (current_program_space);
+  maybe_add_script (pspace_info, is_safe, filename, filename,
+                    &script_language_gdb);
+
+  if (!is_safe)
+    return;
+
+  TRY_CATCH (e, RETURN_MASK_ALL)
+    {
+      script_from_file (file, filename);
+    }
+  exception_print (gdb_stderr, e);
+}
+
+/* For scripts specified in .debug_gdb_scripts, multiple objfiles may load
+   the same script.  There's no point in loading the script multiple times,
+   and there can be a lot of objfiles and scripts, so we keep track of scripts
+   loaded this way.  */
+
+struct auto_load_pspace_info
+{
+  /* For each program space we keep track of loaded scripts.  */
+  struct htab *loaded_scripts;
+
+  /* Non-zero if we've issued the warning about an auto-load script not being
+     found.  We only want to issue this warning once.  */
+  int script_not_found_warning_printed;
+};
+
+/* Objects of this type are stored in the loaded script hash table.  */
+
+struct loaded_script
+{
+  /* Name as provided by the objfile.  */
+  const char *name;
+
+  /* Full path name or NULL if script wasn't found (or was otherwise
+     inaccessible).  */
+  const char *full_path;
+
+  /* Non-zero if this script has been loaded.  */
+  int loaded;
+
+  const struct script_language *language;
+};
+
+/* Per-program-space data key.  */
+static const struct program_space_data *auto_load_pspace_data;
+
+static void
+auto_load_pspace_data_cleanup (struct program_space *pspace, void *arg)
+{
+  struct auto_load_pspace_info *info;
+
+  info = program_space_data (pspace, auto_load_pspace_data);
+  if (info != NULL)
+    {
+      if (info->loaded_scripts)
+        htab_delete (info->loaded_scripts);
+      xfree (info);
+    }
+}
+
+/* Get the current autoload data.  If none is found yet, add it now.  This
+   function always returns a valid object.  */
+
+static struct auto_load_pspace_info *
+get_auto_load_pspace_data (struct program_space *pspace)
+{
+  struct auto_load_pspace_info *info;
+
+  info = program_space_data (pspace, auto_load_pspace_data);
+  if (info == NULL)
+    {
+      info = XZALLOC (struct auto_load_pspace_info);
+      set_program_space_data (pspace, auto_load_pspace_data, info);
+    }
+
+  return info;
+}
+
+/* Hash function for the loaded script hash.  */
+
+static hashval_t
+hash_loaded_script_entry (const void *data)
+{
+  const struct loaded_script *e = data;
+
+  return htab_hash_string (e->name) ^ htab_hash_pointer (e->language);
+}
+
+/* Equality function for the loaded script hash.  */
+
+static int
+eq_loaded_script_entry (const void *a, const void *b)
+{
+  const struct loaded_script *ea = a;
+  const struct loaded_script *eb = b;
+
+  return strcmp (ea->name, eb->name) == 0 && ea->language == eb->language;
+}
+
+/* Initialize the table to track loaded scripts.
+   Each entry is hashed by the full path name.  */
+
+static void
+init_loaded_scripts_info (struct auto_load_pspace_info *pspace_info)
+{
+  /* Choose 31 as the starting size of the hash table, somewhat arbitrarily.
+     Space for each entry is obtained with one malloc so we can free them
+     easily.  */
+
+  pspace_info->loaded_scripts = htab_create (31,
+                                             hash_loaded_script_entry,
+                                             eq_loaded_script_entry,
+                                             xfree);
+
+  pspace_info->script_not_found_warning_printed = FALSE;
+}
+
+/* Wrapper on get_auto_load_pspace_data to also allocate the hash table
+   for loading scripts.  */
+
+struct auto_load_pspace_info *
+get_auto_load_pspace_data_for_loading (struct program_space *pspace)
+{
+  struct auto_load_pspace_info *info;
+
+  info = get_auto_load_pspace_data (pspace);
+  if (info->loaded_scripts == NULL)
+    init_loaded_scripts_info (info);
+
+  return info;
+}
+
+/* Add script NAME in LANGUAGE to hash table of PSPACE_INFO.  LOADED 1 if the
+   script has been (is going to) be loaded, 0 otherwise (such as if it has not
+   been found).  FULL_PATH is NULL if the script wasn't found.  The result is
+   true if the script was already in the hash table.  */
+
+int
+maybe_add_script (struct auto_load_pspace_info *pspace_info, int loaded,
+                  const char *name, const char *full_path,
+                  const struct script_language *language)
+{
+  struct htab *htab = pspace_info->loaded_scripts;
+  struct loaded_script **slot, entry;
+  int in_hash_table;
+
+  entry.name = name;
+  entry.language = language;
+  slot = (struct loaded_script **) htab_find_slot (htab, &entry, INSERT);
+  in_hash_table = *slot != NULL;
+
+  /* If this script is not in the hash table, add it.  */
+
+  if (! in_hash_table)
+    {
+      char *p;
+
+      /* Allocate all space in one chunk so it's easier to free.  */
+      *slot = xmalloc (sizeof (**slot)
+                       + strlen (name) + 1
+                       + (full_path != NULL ? (strlen (full_path) + 1) : 0));
+      p = ((char*) *slot) + sizeof (**slot);
+      strcpy (p, name);
+      (*slot)->name = p;
+      if (full_path != NULL)
+        {
+          p += strlen (p) + 1;
+          strcpy (p, full_path);
+          (*slot)->full_path = p;
+        }
+      else
+        (*slot)->full_path = NULL;
+      (*slot)->loaded = loaded;
+      (*slot)->language = language;
+    }
+
+  return in_hash_table;
+}
+
+/* Clear the table of loaded section scripts.  */
+
+static void
+clear_section_scripts (void)
+{
+  struct program_space *pspace = current_program_space;
+  struct auto_load_pspace_info *info;
+
+  info = program_space_data (pspace, auto_load_pspace_data);
+  if (info != NULL && info->loaded_scripts != NULL)
+    {
+      htab_delete (info->loaded_scripts);
+      info->loaded_scripts = NULL;
+      info->script_not_found_warning_printed = FALSE;
+    }
+}
+
+/* Look for the auto-load script in LANGUAGE associated with OBJFILE where
+   OBJFILE's gdb_realpath is REALNAME and load it.  Return 1 if we found any
+   matching script, return 0 otherwise.  */
+
+static int
+auto_load_objfile_script_1 (struct objfile *objfile, const char *realname,
+                            const struct script_language *language)
+{
+  char *filename, *debugfile;
+  int len, retval;
+  FILE *input;
+  struct cleanup *cleanups;
+
+  len = strlen (realname);
+  filename = xmalloc (len + strlen (language->suffix) + 1);
+  memcpy (filename, realname, len);
+  strcpy (filename + len, language->suffix);
+
+  cleanups = make_cleanup (xfree, filename);
+
+  input = fopen (filename, "r");
+  debugfile = filename;
+  if (debug_auto_load)
+    fprintf_unfiltered (gdb_stdlog, _("auto-load: Attempted file \"%s\" %s.\n"),
+                        debugfile, input ? _("exists") : _("does not exist"));
+
+  if (!input)
+    {
+      VEC (char_ptr) *vec;
+      int ix;
+      char *dir;
+
+      /* Also try the same file in a subdirectory of gdb's data
+         directory.  */
+
+      vec = auto_load_expand_dir_vars (auto_load_dir);
+      make_cleanup_free_char_ptr_vec (vec);
+
+      if (debug_auto_load)
+        fprintf_unfiltered (gdb_stdlog, _("auto-load: Searching 'set auto-load "
+                                          "scripts-directory' path \"%s\".\n"),
+                            auto_load_dir);
+
+      for (ix = 0; VEC_iterate (char_ptr, vec, ix, dir); ++ix)
+        {
+          debugfile = xmalloc (strlen (dir) + strlen (filename) + 1);
+          strcpy (debugfile, dir);
+
+          /* FILENAME is absolute, so we don't need a "/" here.  */
+          strcat (debugfile, filename);
+
+          make_cleanup (xfree, debugfile);
+          input = fopen (debugfile, "r");
+          if (debug_auto_load)
+            fprintf_unfiltered (gdb_stdlog, _("auto-load: Attempted file "
+                                              "\"%s\" %s.\n"),
+                                debugfile,
+                                input ? _("exists") : _("does not exist"));
+          if (input != NULL)
+            break;
+        }
+    }
+
+  if (input)
+    {
+      make_cleanup_fclose (input);
+
+      /* To preserve existing behaviour we don't check for whether the
+         script was already in the table, and always load it.
+         It's highly unlikely that we'd ever load it twice,
+         and these scripts are required to be idempotent under multiple
+         loads anyway.  */
+      language->source_script_for_objfile (objfile, input, debugfile);
+
+      retval = 1;
+    }
+  else
+    retval = 0;
+
+  do_cleanups (cleanups);
+  return retval;
+}
+
+/* Look for the auto-load script in LANGUAGE associated with OBJFILE and load
+   it.  */
+
+void
+auto_load_objfile_script (struct objfile *objfile,
+                          const struct script_language *language)
+{
+  char *realname = gdb_realpath (objfile->name);
+  struct cleanup *cleanups = make_cleanup (xfree, realname);
+
+  if (!auto_load_objfile_script_1 (objfile, realname, language))
+    {
+      /* For Windows/DOS .exe executables, strip the .exe suffix, so that
+         FOO-gdb.gdb could be used for FOO.exe, and try again.  */
+
+      size_t len = strlen (realname);
+      const size_t lexe = sizeof (".exe") - 1;
+
+      if (len > lexe && strcasecmp (realname + len - lexe, ".exe") == 0)
+        {
+          len -= lexe;
+          realname[len] = '\0';
+          if (debug_auto_load)
+            fprintf_unfiltered (gdb_stdlog, _("auto-load: Stripped .exe suffix, "
+                                              "retrying with \"%s\".\n"),
+                                realname);
+          auto_load_objfile_script_1 (objfile, realname, language);
+        }
+    }
+
+  do_cleanups (cleanups);
+}
+
+/* Load any auto-loaded scripts for OBJFILE.  */
+
+void
+load_auto_scripts_for_objfile (struct objfile *objfile)
+{
+  if (!global_auto_load)
+    return;
+
+  if (auto_load_gdb_scripts)
+    auto_load_objfile_script (objfile, &script_language_gdb);
+
+  gdbpy_load_auto_scripts_for_objfile (objfile);
+}
+
+/* This is a new_objfile observer callback to auto-load scripts.
+
+   Two flavors of auto-loaded scripts are supported.
+   1) based on the path to the objfile
+   2) from .debug_gdb_scripts section  */
+
+static void
+auto_load_new_objfile (struct objfile *objfile)
+{
+  if (!objfile)
+    {
+      /* OBJFILE is NULL when loading a new "main" symbol-file.  */
+      clear_section_scripts ();
+      return;
+    }
+
+  load_auto_scripts_for_objfile (objfile);
+}
+
+/* Collect scripts to be printed in a vec.  */
+
+typedef struct loaded_script *loaded_script_ptr;
+DEF_VEC_P (loaded_script_ptr);
+
+struct collect_matching_scripts_data
+{
+  VEC (loaded_script_ptr) **scripts_p;
+
+  const struct script_language *language;
+};
+
+/* Traversal function for htab_traverse.
+   Collect the entry if it matches the regexp.  */
+
+static int
+collect_matching_scripts (void **slot, void *info)
+{
+  struct loaded_script *script = *slot;
+  struct collect_matching_scripts_data *data = info;
+
+  if (script->language == data->language && re_exec (script->name))
+    VEC_safe_push (loaded_script_ptr, *data->scripts_p, script);
+
+  return 1;
+}
+
+/* Print SCRIPT.  */
+
+static void
+print_script (struct loaded_script *script)
+{
+  struct ui_out *uiout = current_uiout;
+  struct cleanup *chain;
+
+  chain = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
+
+  ui_out_field_string (uiout, "loaded", script->loaded ? "Yes" : "No");
+  ui_out_field_string (uiout, "script", script->name);
+  ui_out_text (uiout, "\n");
+
+  /* If the name isn't the full path, print it too.  */
+  if (script->full_path != NULL
+      && strcmp (script->name, script->full_path) != 0)
+    {
+      ui_out_text (uiout, "\tfull name: ");
+      ui_out_field_string (uiout, "full_path", script->full_path);
+      ui_out_text (uiout, "\n");
+    }
+
+  do_cleanups (chain);
+}
+
+/* Helper for info_auto_load_scripts to sort the scripts by name.  */
+
+static int
+sort_scripts_by_name (const void *ap, const void *bp)
+{
+  const struct loaded_script *a = *(const struct loaded_script **) ap;
+  const struct loaded_script *b = *(const struct loaded_script **) bp;
+
+  return FILENAME_CMP (a->name, b->name);
+}
+
+/* Special internal GDB value of auto_load_info_scripts's PATTERN identify
+   the "info auto-load XXX" command has been executed through the general
+   "info auto-load" invocation.  Extra newline will be printed if needed.  */
+char auto_load_info_scripts_pattern_nl[] = "";
+
+/* Implementation for "info auto-load gdb-scripts"
+   (and "info auto-load python-scripts").  List scripts in LANGUAGE matching
+   PATTERN.  FROM_TTY is the usual GDB boolean for user interactivity.  */
+
+void
+auto_load_info_scripts (char *pattern, int from_tty,
+                        const struct script_language *language)
+{
+  struct ui_out *uiout = current_uiout;
+  struct auto_load_pspace_info *pspace_info;
+  struct cleanup *script_chain;
+  VEC (loaded_script_ptr) *scripts;
+  int nr_scripts;
+
+  dont_repeat ();
+
+  pspace_info = get_auto_load_pspace_data (current_program_space);
+
+  if (pattern && *pattern)
+    {
+      char *re_err = re_comp (pattern);
+
+      if (re_err)
+        error (_("Invalid regexp: %s"), re_err);
+    }
+  else
+    {
+      re_comp ("");
+    }
+
+  /* We need to know the number of rows before we build the table.
+     Plus we want to sort the scripts by name.
+     So first traverse the hash table collecting the matching scripts.  */
+
+  scripts = VEC_alloc (loaded_script_ptr, 10);
+  script_chain = make_cleanup (VEC_cleanup (loaded_script_ptr), &scripts);
+
+  if (pspace_info != NULL && pspace_info->loaded_scripts != NULL)
+    {
+      struct collect_matching_scripts_data data = { &scripts, language };
+
+      immediate_quit++;
+      /* Pass a pointer to scripts as VEC_safe_push can realloc space.  */
+      htab_traverse_noresize (pspace_info->loaded_scripts,
+                              collect_matching_scripts, &data);
+      immediate_quit--;
+    }
+
+  nr_scripts = VEC_length (loaded_script_ptr, scripts);
+
+  /* Table header shifted right by preceding "gdb-scripts:  " would not match
+     its columns.  */
+  if (nr_scripts > 0 && pattern == auto_load_info_scripts_pattern_nl)
+    ui_out_text (uiout, "\n");
+
+  make_cleanup_ui_out_table_begin_end (uiout, 2, nr_scripts,
+                                       "AutoLoadedScriptsTable");
+
+  ui_out_table_header (uiout, 7, ui_left, "loaded", "Loaded");
+  ui_out_table_header (uiout, 70, ui_left, "script", "Script");
+  ui_out_table_body (uiout);
+
+  if (nr_scripts > 0)
+    {
+      int i;
+      loaded_script_ptr script;
+
+      qsort (VEC_address (loaded_script_ptr, scripts),
+             VEC_length (loaded_script_ptr, scripts),
+             sizeof (loaded_script_ptr), sort_scripts_by_name);
+      for (i = 0; VEC_iterate (loaded_script_ptr, scripts, i, script); ++i)
+        print_script (script);
+    }
+
+  do_cleanups (script_chain);
+
+  if (nr_scripts == 0)
+    {
+      if (pattern && *pattern)
+        ui_out_message (uiout, 0, "No auto-load scripts matching %s.\n",
+                        pattern);
+      else
+        ui_out_message (uiout, 0, "No auto-load scripts.\n");
+    }
+}
+
+/* Wrapper for "info auto-load gdb-scripts".  */
+
+static void
+info_auto_load_gdb_scripts (char *pattern, int from_tty)
+{
+  auto_load_info_scripts (pattern, from_tty, &script_language_gdb);
+}
+
+/* Implement 'info auto-load local-gdbinit'.  */
+
+static void
+info_auto_load_local_gdbinit (char *args, int from_tty)
+{
+  if (auto_load_local_gdbinit_pathname == NULL)
+    printf_filtered (_("Local .gdbinit file was not found.\n"));
+  else if (auto_load_local_gdbinit_loaded)
+    printf_filtered (_("Local .gdbinit file \"%s\" has been loaded.\n"),
+                     auto_load_local_gdbinit_pathname);
+  else
+    printf_filtered (_("Local .gdbinit file \"%s\" has not been loaded.\n"),
+                     auto_load_local_gdbinit_pathname);
+}
+
+/* Return non-zero if SCRIPT_NOT_FOUND_WARNING_PRINTED of PSPACE_INFO was unset
+   before calling this function.  Always set SCRIPT_NOT_FOUND_WARNING_PRINTED
+   of PSPACE_INFO.  */
+
+int
+script_not_found_warning_print (struct auto_load_pspace_info *pspace_info)
+{
+  int retval = !pspace_info->script_not_found_warning_printed;
+
+  pspace_info->script_not_found_warning_printed = 1;
+
+  return retval;
+}
+
+/* The only valid "set auto-load" argument is off|0|no|disable.  */
+
+static void
+set_auto_load_cmd (char *args, int from_tty)
+{
+  struct cmd_list_element *list;
+  size_t length;
+
+  /* See parse_binary_operation in use by the sub-commands.  */
+
+  length = args ? strlen (args) : 0;
+
+  while (length > 0 && (args[length - 1] == ' ' || args[length - 1] == '\t'))
+    length--;
+
+  if (length == 0 || (strncmp (args, "off", length) != 0
+                      && strncmp (args, "0", length) != 0
+                      && strncmp (args, "no", length) != 0
+                      && strncmp (args, "disable", length) != 0))
+    error (_("Valid is only global 'set auto-load no'; "
+             "otherwise check the auto-load sub-commands."));
+
+  for (list = *auto_load_set_cmdlist_get (); list != NULL; list = list->next)
+    if (list->var_type == var_boolean)
+      {
+        gdb_assert (list->type == set_cmd);
+        do_setshow_command (args, from_tty, list);
+      }
+}
+
+/* Initialize "set auto-load " commands prefix and return it.  */
+
+struct cmd_list_element **
+auto_load_set_cmdlist_get (void)
+{
+  static struct cmd_list_element *retval;
+
+  if (retval == NULL)
+    add_prefix_cmd ("auto-load", class_maintenance, set_auto_load_cmd, _("\
+Auto-loading specific settings.\n\
+Configure various auto-load-specific variables such as\n\
+automatic loading of Python scripts."),
+                    &retval, "set auto-load ",
+                    1/*allow-unknown*/, &setlist);
+
+  return &retval;
+}
+
+/* Command "show auto-load" displays summary of all the current
+   "show auto-load " settings.  */
+
+static void
+show_auto_load_cmd (char *args, int from_tty)
+{
+  cmd_show_list (*auto_load_show_cmdlist_get (), from_tty, "");
+}
+
+/* Initialize "show auto-load " commands prefix and return it.  */
+
+struct cmd_list_element **
+auto_load_show_cmdlist_get (void)
+{
+  static struct cmd_list_element *retval;
+
+  if (retval == NULL)
+    add_prefix_cmd ("auto-load", class_maintenance, show_auto_load_cmd, _("\
+Show auto-loading specific settings.\n\
+Show configuration of various auto-load-specific variables such as\n\
+automatic loading of Python scripts."),
+                    &retval, "show auto-load ",
+                    0/*allow-unknown*/, &showlist);
+
+  return &retval;
+}
+
+/* Command "info auto-load" displays whether the various auto-load files have
+   been loaded.  This is reimplementation of cmd_show_list which inserts
+   newlines at proper places.  */
+
+static void
+info_auto_load_cmd (char *args, int from_tty)
+{
+  struct cmd_list_element *list;
+  struct cleanup *infolist_chain;
+  struct ui_out *uiout = current_uiout;
+
+  infolist_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "infolist");
+
+  for (list = *auto_load_info_cmdlist_get (); list != NULL; list = list->next)
+    {
+      struct cleanup *option_chain
+        = make_cleanup_ui_out_tuple_begin_end (uiout, "option");
+
+      gdb_assert (!list->prefixlist);
+      gdb_assert (list->type == not_set_cmd);
+
+      ui_out_field_string (uiout, "name", list->name);
+      ui_out_text (uiout, ":  ");
+      cmd_func (list, auto_load_info_scripts_pattern_nl, from_tty);
+
+      /* Close the tuple.  */
+      do_cleanups (option_chain);
+    }
+
+  /* Close the tuple.  */
+  do_cleanups (infolist_chain);
+}
+
+/* Initialize "info auto-load " commands prefix and return it.  */
+
+struct cmd_list_element **
+auto_load_info_cmdlist_get (void)
+{
+  static struct cmd_list_element *retval;
+
+  if (retval == NULL)
+    add_prefix_cmd ("auto-load", class_info, info_auto_load_cmd, _("\
+Print current status of auto-loaded files.\n\
+Print whether various files like Python scripts or .gdbinit files have been\n\
+found and/or loaded."),
+                    &retval, "info auto-load ",
+                    0/*allow-unknown*/, &infolist);
+
+  return &retval;
+}
+
+void _initialize_auto_load (void);
+
+void
+_initialize_auto_load (void)
+{
+  struct cmd_list_element *cmd;
+  char *scripts_directory_help;
+
+  auto_load_pspace_data
+    = register_program_space_data_with_cleanup (auto_load_pspace_data_cleanup);
+
+  observer_attach_new_objfile (auto_load_new_objfile);
+
+  add_setshow_boolean_cmd ("gdb-scripts", class_support,
+                           &auto_load_gdb_scripts, _("\
+Enable or disable auto-loading of canned sequences of commands scripts."), _("\
+Show whether auto-loading of canned sequences of commands scripts is enabled."),
+                           _("\
+If enabled, canned sequences of commands 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_gdb_scripts,
+                           auto_load_set_cmdlist_get (),
+                           auto_load_show_cmdlist_get ());
+
+  add_cmd ("gdb-scripts", class_info, info_auto_load_gdb_scripts,
+           _("Print the list of automatically loaded sequences of commands.\n\
+Usage: info auto-load gdb-scripts [REGEXP]"),
+           auto_load_info_cmdlist_get ());
+
+  add_setshow_boolean_cmd ("local-gdbinit", class_support,
+                           &auto_load_local_gdbinit, _("\
+Enable or disable auto-loading of .gdbinit script in current directory."), _("\
+Show whether auto-loading .gdbinit script in current directory is enabled."),
+                           _("\
+If enabled, canned sequences of commands are loaded when debugger starts\n\
+from .gdbinit file in current directory.  Such files are deprecated,\n\
+use a script associated with inferior executable file instead.\n\
+This options has security implications for untrusted inferiors."),
+                           NULL, show_auto_load_local_gdbinit,
+                           auto_load_set_cmdlist_get (),
+                           auto_load_show_cmdlist_get ());
+
+  add_cmd ("local-gdbinit", class_info, info_auto_load_local_gdbinit,
+           _("Print whether current directory .gdbinit file has been loaded.\n\
+Usage: info auto-load local-gdbinit"),
+           auto_load_info_cmdlist_get ());
+
+  auto_load_dir = xstrdup (AUTO_LOAD_DIR);
+  scripts_directory_help = xstrprintf (
+#ifdef HAVE_PYTHON
+                                       _("\
+Automatically loaded Python scripts (named OBJFILE%s) and GDB scripts\n\
+(named OBJFILE%s) are located in one of the directories listed by this\n\
+option.\n\
+%s"),
+                                       GDBPY_AUTO_FILE_NAME,
+#else
+                                       _("\
+Automatically loaded GDB scripts (named OBJFILE%s) are located in one\n\
+of the directories listed by this option.\n\
+%s"),
+#endif
+                                       GDB_AUTO_FILE_NAME,
+                                       _("\
+This option is ignored for the kinds of scripts \
+having 'set auto-load ... off'.\n\
+Directories listed here need to be present also \
+in the 'set auto-load safe-path'\n\
+option."));
+  add_setshow_optional_filename_cmd ("scripts-directory", class_support,
+                                     &auto_load_dir, _("\
+Set the list of directories from which to load auto-loaded scripts."), _("\
+Show the list of directories from which to load auto-loaded scripts."),
+                                     scripts_directory_help,
+                                     set_auto_load_dir, show_auto_load_dir,
+                                     auto_load_set_cmdlist_get (),
+                                     auto_load_show_cmdlist_get ());
+  xfree (scripts_directory_help);
+
+  auto_load_safe_path = xstrdup (AUTO_LOAD_SAFE_PATH);
+  auto_load_safe_path_vec_update ();
+  add_setshow_optional_filename_cmd ("safe-path", class_support,
+                                     &auto_load_safe_path, _("\
+Set the list of files and directories that are safe for auto-loading."), _("\
+Show the list of files and directories that are safe for auto-loading."), _("\
+Various files loaded automatically for the 'set auto-load ...' options must\n\
+be located in one of the directories listed by this option.  Warning will be\n\
+printed and file will not be used otherwise.\n\
+You can mix both directory and filename entries.\n\
+Setting this parameter to an empty list resets it to its default value.\n\
+Setting this parameter to '/' (without the quotes) allows any file\n\
+for the 'set auto-load ...' options.  Each path entry can be also shell\n\
+wildcard pattern; '*' does not match directory separator.\n\
+This option is ignored for the kinds of files having 'set auto-load ... off'.\n\
+This options has security implications for untrusted inferiors."),
+                                     set_auto_load_safe_path,
+                                     show_auto_load_safe_path,
+                                     auto_load_set_cmdlist_get (),
+                                     auto_load_show_cmdlist_get ());
+  observer_attach_gdb_datadir_changed (auto_load_gdb_datadir_changed);
+
+  cmd = add_cmd ("add-auto-load-safe-path", class_support,
+                 add_auto_load_safe_path,
+                 _("Add entries to the list of directories from which it is safe "
+                   "to auto-load files.\n\
+See the commands 'set auto-load safe-path' and 'show auto-load safe-path' to\n\
+access the current full list setting."),
+                 &cmdlist);
+  set_cmd_completer (cmd, filename_completer);
+
+  add_setshow_boolean_cmd ("auto-load", class_maintenance,
+                           &debug_auto_load, _("\
+Set auto-load verifications debugging."), _("\
+Show auto-load verifications debugging."), _("\
+When non-zero, debugging output for files of 'set auto-load ...'\n\
+is displayed."),
+                            NULL, show_debug_auto_load,
+                            &setdebuglist, &showdebuglist);
+}