Move .debug_gdb_script processing to auto-load.c.

Simplify handling of auto-loaded objfile scripts.

.debug_gdb_scripts was always intended to handle more than just python,
thus the rightful home for the code that processes it is not in py-foo.c.
This is just a cleanup to move the code to a better place.

This also simplifies the handling of the ${objfile}-${suffix} auto-loaded
scripts.  There's no need for each of the the handlers to do is-safe-to-load
checking, or call maybe_add_script.  Doing it in the caller removes the
duplication.

	* auto-load.h (script_language): New members name, auto_load_enabled.
	Add missing comments on struct members.
	(auto_load_objfile_script): Delete.
	* auto-load.c: #include "cli/cli-cmds.h".
	(auto_load_gdb_scripts_enabled): New function.
	(script_language_gdb): Update, add new members.
	(source_gdb_script_for_objfile): Simplify, auto-load safe-checking
	and call to maybe_add_script moved to caller.
	(auto_load_objfile_script_1): Auto-load safe-checking and
	call to maybe_add_script moved here.
	(auto_load_objfile_script): Make static.  Early exit if support for
	scripting language hasn't been compiled in, or auto-loading has been
	disabled.
	(source_section_scripts): Argument "source_name" renamed to
	"section_name".  All uses updated.  Replace uses of AUTO_SECTION_NAME
	with section_name.  Skip loading script if support for scripting
	language hasn't been compiled in, or auto-loading has been disabled.
	Call language->source_script_for_objfile instead of calling
	source_python_script_for_objfile directly.
	(load_auto_scripts_for_objfile): Update.
	* python/py-auto-load.c: Delete #include "cli/cli-cmds.h".
	(gdbpy_load_auto_script_for_objfile): Delete.
	(auto_load_python_scripts_enabled): New function.
	(script_language_python): Update, add new members.
	(gdbpy_script_language_defn): New function.
	* python/python.h (gdbpy_load_auto_scripts_for_objfile): Delete.
	(gdbpy_script_language_defn): Declare.

	* auto-load.c (AUTO_SECTION_NAME): Moved here and renamed from
	py-auto-load.c, GDBPY_AUTO_SECTION_NAME.
	(source_section_scripts): Moved here from py-auto-load.c.
	(auto_load_section_scripts): Ditto.
	* python/py-auto-load.c (GDBPY_AUTO_SECTION_NAME): Moved to
	auto-load.c, renamed AUTO_SECTION_NAME.
	(source_section_scripts, auto_load_section_scripts): Moved to
	auto-load.c.

2 files changed, 22 insertions, 177 deletions

diff --git a/gdb/python/py-auto-load.c b/gdb/python/py-auto-load.c
index 827918a..d5450b3 100644
--- a/gdb/python/py-auto-load.c
+++ b/gdb/python/py-auto-load.c
@@ -24,30 +24,18 @@
 #include "gdbcmd.h"
 #include "objfiles.h"
 #include "python.h"
-#include "cli/cli-cmds.h"
 #include "auto-load.h"
 
 #ifdef HAVE_PYTHON
 
 #include "python-internal.h"
 
-/* The section to look for Python auto-loaded scripts (in file formats that
-   support sections).
-   Each entry in this section is a byte of value 1, and then the nul-terminated
-   name of the script.  The script name may include a directory.
-   The leading byte is to allow upward compatible extensions.  */
-#define GDBPY_AUTO_SECTION_NAME ".debug_gdb_scripts"
-
 /* User-settable option to enable/disable auto-loading of Python scripts:
    set auto-load python-scripts on|off
    This is true if we should auto-load associated Python scripts when an
    objfile is opened, false otherwise.  */
 static int auto_load_python_scripts = 1;
 
-static void gdbpy_load_auto_script_for_objfile (struct objfile *objfile,
-						FILE *file,
-						const char *filename);
-
 /* "show" command for the auto_load_python_scripts configuration variable.  */
 
 static void
@@ -57,177 +45,30 @@ show_auto_load_python_scripts (struct ui_file *file, int from_tty,
   fprintf_filtered (file, _("Auto-loading of Python scripts is %s.\n"), value);
 }
 
-/* Definition of script language for Python scripts.  */
-
-static const struct script_language script_language_python
-  = { GDBPY_AUTO_FILE_NAME, gdbpy_load_auto_script_for_objfile };
-
-/* Wrapper of source_python_script_for_objfile for script_language_python.  */
+/* Return non-zero if auto-loading Python scripts is enabled.  */
 
-static void
-gdbpy_load_auto_script_for_objfile (struct objfile *objfile, FILE *file,
-				    const char *filename)
+static int
+auto_load_python_scripts_enabled (void)
 {
-  int is_safe;
-  struct auto_load_pspace_info *pspace_info;
-
-  is_safe = file_is_auto_load_safe (filename,
-				    _("auto-load: Loading Python script \"%s\" "
-				      "by extension for objfile \"%s\".\n"),
-				    filename, objfile_name (objfile));
-
-  /* Add this script to the hash table too so "info auto-load python-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_python);
-
-  if (is_safe)
-    source_python_script_for_objfile (objfile, file, filename);
+  return auto_load_python_scripts;
 }
 
-/* Load scripts specified in OBJFILE.
-   START,END delimit a buffer containing a list of nul-terminated
-   file names.
-   SOURCE_NAME is used in error messages.
-
-   Scripts are found per normal "source -s" command processing.
-   First the script is looked for in $cwd.  If not found there the
-   source search path is used.
-
-   The section contains a list of path names of files containing
-   python code to load.  Each path is null-terminated.  */
-
-static void
-source_section_scripts (struct objfile *objfile, const char *source_name,
-			const char *start, const char *end)
-{
-  const char *p;
-  struct auto_load_pspace_info *pspace_info;
-
-  pspace_info = get_auto_load_pspace_data_for_loading (current_program_space);
-
-  for (p = start; p < end; ++p)
-    {
-      const char *file;
-      FILE *stream;
-      char *full_path;
-      int opened, in_hash_table;
-      struct cleanup *back_to;
-
-      if (*p != 1)
-	{
-	  warning (_("Invalid entry in %s section"), GDBPY_AUTO_SECTION_NAME);
-	  /* We could try various heuristics to find the next valid entry,
-	     but it's safer to just punt.  */
-	  break;
-	}
-      file = ++p;
-
-      while (p < end && *p != '\0')
-	++p;
-      if (p == end)
-	{
-	  char *buf = alloca (p - file + 1);
-
-	  memcpy (buf, file, p - file);
-	  buf[p - file] = '\0';
-	  warning (_("Non-null-terminated path in %s: %s"),
-		   source_name, buf);
-	  /* Don't load it.  */
-	  break;
-	}
-      if (p == file)
-	{
-	  warning (_("Empty path in %s"), source_name);
-	  continue;
-	}
-
-      opened = find_and_open_script (file, 1 /*search_path*/,
-				     &stream, &full_path);
-
-      back_to = make_cleanup (null_cleanup, NULL);
-      if (opened)
-	{
-	  make_cleanup_fclose (stream);
-	  make_cleanup (xfree, full_path);
-
-	  if (!file_is_auto_load_safe (full_path,
-				       _("auto-load: Loading Python script "
-					 "\"%s\" from section \"%s\" of "
-					 "objfile \"%s\".\n"),
-				       full_path, GDBPY_AUTO_SECTION_NAME,
-				       objfile_name (objfile)))
-	    opened = 0;
-	}
-      else
-	{
-	  full_path = NULL;
-
-	  /* If one script isn't found it's not uncommon for more to not be
-	     found either.  We don't want to print a message for each script,
-	     too much noise.  Instead, we print the warning once and tell the
-	     user how to find the list of scripts that weren't loaded.
-	     We don't throw an error, the program is still debuggable.
-
-	     IWBN if complaints.c were more general-purpose.  */
-
-	  if (script_not_found_warning_print (pspace_info))
-	    warning (_("Missing auto-load scripts referenced in section %s\n\
-of file %s\n\
-Use `info auto-load python [REGEXP]' to list them."),
-		     GDBPY_AUTO_SECTION_NAME, objfile_name (objfile));
-	}
-
-      in_hash_table = maybe_add_script (pspace_info, opened, file, full_path,
-					&script_language_python);
-
-      /* If this file is not currently loaded, load it.  */
-      if (opened && !in_hash_table)
-	source_python_script_for_objfile (objfile, stream, full_path);
-
-      do_cleanups (back_to);
-    }
-}
-
-/* Load scripts specified in section SECTION_NAME of OBJFILE.  */
+/* Definition of script language for Python scripts.  */
 
-static void
-auto_load_section_scripts (struct objfile *objfile, const char *section_name)
+static const struct script_language script_language_python =
 {
-  bfd *abfd = objfile->obfd;
-  asection *scripts_sect;
-  bfd_byte *data = NULL;
-
-  scripts_sect = bfd_get_section_by_name (abfd, section_name);
-  if (scripts_sect == NULL)
-    return;
+  "python",
+  GDBPY_AUTO_FILE_NAME,
+  auto_load_python_scripts_enabled,
+  source_python_script_for_objfile
+};
 
-  if (!bfd_get_full_section_contents (abfd, scripts_sect, &data))
-    warning (_("Couldn't read %s section of %s"),
-	     section_name, bfd_get_filename (abfd));
-  else
-    {
-      struct cleanup *cleanups;
-      char *p = (char *) data;
+/* Return the Python script language definition.  */
 
-      cleanups = make_cleanup (xfree, p);
-      source_section_scripts (objfile, section_name, p,
-			      p + bfd_get_section_size (scripts_sect));
-      do_cleanups (cleanups);
-    }
-}
-
-/* Load any Python auto-loaded scripts for OBJFILE.  */
-
-void
-gdbpy_load_auto_scripts_for_objfile (struct objfile *objfile)
+const struct script_language *
+gdbpy_script_language_defn (void)
 {
-  if (auto_load_python_scripts)
-    {
-      auto_load_objfile_script (objfile, &script_language_python);
-      auto_load_section_scripts (objfile, GDBPY_AUTO_SECTION_NAME);
-    }
+  return &script_language_python;
 }
 
 /* Wrapper for "info auto-load python-scripts".  */
@@ -287,9 +128,13 @@ Print the list of automatically loaded Python scripts, deprecated."));
 
 #else /* ! HAVE_PYTHON */
 
-void
-gdbpy_load_auto_scripts_for_objfile (struct objfile *objfile)
+/* Return the Python script language definition.
+   Since support isn't compiled in, return NULL.  */
+
+const struct script_language *
+gdbpy_script_language_defn (void)
 {
+  return NULL;
 }
 
 #endif /* ! HAVE_PYTHON */
diff --git a/gdb/python/python.h b/gdb/python/python.h
index 047fb4c..c07b2aa 100644
--- a/gdb/python/python.h
+++ b/gdb/python/python.h
@@ -109,7 +109,7 @@ enum py_bt_status apply_frame_filter (struct frame_info *frame, int flags,
 
 void preserve_python_values (struct objfile *objfile, htab_t copied_types);
 
-void gdbpy_load_auto_scripts_for_objfile (struct objfile *objfile);
+const struct script_language *gdbpy_script_language_defn (void);
 
 int gdbpy_should_stop (struct gdbpy_breakpoint_object *bp_obj);