/* GDB routines for supporting auto-loaded scripts.
- Copyright (C) 2010, 2011 Free Software Foundation, Inc.
+ Copyright (C) 2010-2012 Free Software Foundation, Inc.
This file is part of GDB.
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include "filenames.h"
#include "gdb_string.h"
-#include "gdb_regex.h"
#include "top.h"
#include "exceptions.h"
-#include "command.h"
#include "gdbcmd.h"
-#include "observer.h"
-#include "progspace.h"
#include "objfiles.h"
#include "python.h"
#include "cli/cli-cmds.h"
-
-/* 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 && gdbpy_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 gdbpy_global_auto_load = 1;
+#include "auto-load.h"
#ifdef HAVE_PYTHON
The leading byte is to allow upward compatible extensions. */
#define GDBPY_AUTO_SECTION_NAME ".debug_gdb_scripts"
-/* 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;
-};
-
/* User-settable option to enable/disable auto-loading:
set auto-load-scripts on|off
This is true if we should auto-load associated scripts when an objfile
The fact that it lives here is just an implementation detail. */
static int auto_load_scripts = 1;
-/* 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);
-}
-
-/* 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;
-}
-
-/* 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. */
-
-static 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 to hash table HTAB.
- FULL_PATH is NULL if the script wasn't found.
- The result is true if the script was already in the hash table. */
-
-static int
-maybe_add_script (struct htab *htab, const char *name, const char *full_path)
-{
- struct loaded_script **slot, entry;
- int in_hash_table;
-
- entry.name = name;
- entry.full_path = full_path;
- 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;
- }
-
- return in_hash_table;
-}
-
/* Load scripts specified in OBJFILE.
START,END delimit a buffer containing a list of nul-terminated
file names.
FILE *stream;
char *full_path;
int opened, in_hash_table;
+ struct cleanup *back_to;
if (*p != 1)
{
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 one script isn't found it's not uncommon for more to not be
found either. We don't want to print an error message for each
script, too much noise. Instead, we print the warning once and tell
IWBN if complaints.c were more general-purpose. */
- in_hash_table = maybe_add_script (pspace_info->loaded_scripts, file,
+ in_hash_table = maybe_add_script (pspace_info, file,
opened ? full_path : NULL);
- if (opened)
- free (full_path);
-
if (! opened)
{
/* We don't throw an error, the program is still debuggable. */
- if (! pspace_info->script_not_found_warning_printed)
- {
- warning (_("Missing auto-load scripts referenced in %s.\n\
+ 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-scripts [REGEXP]' to list them."),
- GDBPY_AUTO_SECTION_NAME);
- pspace_info->script_not_found_warning_printed = TRUE;
- }
- continue;
+ GDBPY_AUTO_SECTION_NAME, objfile->name);
+ }
+ else
+ {
+ /* If this file is not currently loaded, load it. */
+ if (! in_hash_table)
+ source_python_script_for_objfile (objfile, stream, full_path);
}
- /* If this file is not currently loaded, load it. */
- if (! in_hash_table)
- source_python_script_for_objfile (objfile, stream, file);
+ do_cleanups (back_to);
}
}
do_cleanups (cleanups);
}
-/* 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 associated with OBJFILE and load it. */
-
-static void
-auto_load_objfile_script (struct objfile *objfile, const char *suffix)
-{
- char *realname;
- char *filename, *debugfile;
- int len;
- FILE *input;
- struct cleanup *cleanups;
-
- realname = gdb_realpath (objfile->name);
- len = strlen (realname);
- filename = xmalloc (len + strlen (suffix) + 1);
- memcpy (filename, realname, len);
- strcpy (filename + len, suffix);
-
- cleanups = make_cleanup (xfree, filename);
- make_cleanup (xfree, realname);
-
- input = fopen (filename, "r");
- debugfile = filename;
-
- if (!input && debug_file_directory)
- {
- /* Also try the same file in the separate debug info directory. */
- debugfile = xmalloc (strlen (filename)
- + strlen (debug_file_directory) + 1);
- strcpy (debugfile, debug_file_directory);
- /* FILENAME is absolute, so we don't need a "/" here. */
- strcat (debugfile, filename);
-
- make_cleanup (xfree, debugfile);
- input = fopen (debugfile, "r");
- }
-
- if (!input && gdb_datadir)
- {
- /* Also try the same file in a subdirectory of gdb's data
- directory. */
- debugfile = xmalloc (strlen (gdb_datadir) + strlen (filename)
- + strlen ("/auto-load") + 1);
- strcpy (debugfile, gdb_datadir);
- strcat (debugfile, "/auto-load");
- /* FILENAME is absolute, so we don't need a "/" here. */
- strcat (debugfile, filename);
-
- make_cleanup (xfree, debugfile);
- input = fopen (debugfile, "r");
- }
-
- if (input)
- {
- struct auto_load_pspace_info *pspace_info;
-
- /* Add this script to the hash table too so "info auto-load-scripts"
- can print it. */
- pspace_info =
- get_auto_load_pspace_data_for_loading (current_program_space);
- maybe_add_script (pspace_info->loaded_scripts, debugfile, debugfile);
-
- /* 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. */
- source_python_script_for_objfile (objfile, input, debugfile);
- fclose (input);
- }
-
- do_cleanups (cleanups);
-}
-
-/* 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);
-}
-
/* Load any auto-loaded scripts for OBJFILE. */
void
}
}
\f
-/* Collect scripts to be printed in a vec. */
-
-typedef struct loaded_script *loaded_script_ptr;
-DEF_VEC_P (loaded_script_ptr);
-
-/* 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;
- VEC (loaded_script_ptr) *scripts = info;
-
- if (re_exec (script->name))
- VEC_safe_push (loaded_script_ptr, scripts, script);
-
- return 1;
-}
-
-/* Print SCRIPT. */
-
-static void
-print_script (struct loaded_script *script)
-{
- struct cleanup *chain;
-
- chain = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
-
- ui_out_field_string (uiout, "loaded", script->full_path ? "Yes" : "Missing");
- 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);
-}
-
-/* "info auto-load-scripts" command. */
-
-static void
-info_auto_load_scripts (char *pattern, int from_tty)
-{
- 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)
- {
- immediate_quit++;
- htab_traverse_noresize (pspace_info->loaded_scripts,
- collect_matching_scripts, scripts);
- immediate_quit--;
- }
-
- nr_scripts = VEC_length (loaded_script_ptr, scripts);
- 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");
- }
-}
-\f
void
gdbpy_initialize_auto_load (void)
{
- 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 ("auto-load-scripts", class_support,
&auto_load_scripts, _("\
Set the debugger's behaviour regarding auto-loaded scripts."), _("\
NULL, NULL,
&setlist,
&showlist);
-
- add_info ("auto-load-scripts",
- info_auto_load_scripts,
- _("Print the list of automatically loaded scripts.\n\
-Usage: info auto-load-scripts [REGEXP]"));
}
#else /* ! HAVE_PYTHON */
projects / deliverable / binutils-gdb.git / blobdiff