From: Tom Tromey <tom@tromey.com>
To: gdb-patches@sourceware.org
Cc: Tom Tromey <tom@tromey.com>
Subject: [RFA v2 03/24] Change return type of find_and_open_script
Date: Tue, 25 Jul 2017 17:27:00 -0000 [thread overview]
Message-ID: <20170725172107.9799-4-tom@tromey.com> (raw)
In-Reply-To: <20170725172107.9799-1-tom@tromey.com>
This changes find_and_open_script to return a
gdb::optional<open_script>, where open_script is a new type
encapsulating the two return values. The new type helps avoid
cleanups in the callers.
ChangeLog
2017-07-25 Tom Tromey <tom@tromey.com>
* cli/cli-cmds.c (find_and_open_script): Change return type.
Remove "streamp" and "full_path" parameters.
(source_script_with_search): Update.
* auto-load.c (source_script_file): Update.
* cli/cli-cmds.h (find_and_open_script): Change type.
(open_script): New struct.
---
gdb/ChangeLog | 9 +++++++++
gdb/auto-load.c | 32 +++++++++++++-------------------
gdb/cli/cli-cmds.c | 40 ++++++++++++++++++----------------------
gdb/cli/cli-cmds.h | 21 +++++++++++++++++++--
4 files changed, 59 insertions(+), 43 deletions(-)
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index cebc5c8..fc9d184 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,14 @@
2017-07-25 Tom Tromey <tom@tromey.com>
+ * cli/cli-cmds.c (find_and_open_script): Change return type.
+ Remove "streamp" and "full_path" parameters.
+ (source_script_with_search): Update.
+ * auto-load.c (source_script_file): Update.
+ * cli/cli-cmds.h (find_and_open_script): Change type.
+ (open_script): New struct.
+
+2017-07-25 Tom Tromey <tom@tromey.com>
+
* xml-support.c (xml_fetch_content_from_file): Update.
* ui-file.c (stdio_file::open): Update.
* tracefile-tfile.c (tfile_start): Update.
diff --git a/gdb/auto-load.c b/gdb/auto-load.c
index 292f2ae..da38d32 100644
--- a/gdb/auto-load.c
+++ b/gdb/auto-load.c
@@ -928,10 +928,7 @@ source_script_file (struct auto_load_pspace_info *pspace_info,
const char *section_name, unsigned int offset,
const char *file)
{
- FILE *stream;
- char *full_path;
- int opened, in_hash_table;
- struct cleanup *cleanups;
+ int in_hash_table;
objfile_script_sourcer_func *sourcer;
/* Skip this script if support is not compiled in. */
@@ -953,26 +950,25 @@ source_script_file (struct auto_load_pspace_info *pspace_info,
return;
}
- opened = find_and_open_script (file, 1 /*search_path*/,
- &stream, &full_path);
+ gdb::optional<open_script> opened = find_and_open_script (file,
+ 1 /*search_path*/);
+ const char *path_ptr;
- cleanups = make_cleanup (null_cleanup, NULL);
if (opened)
{
- make_cleanup_fclose (stream);
- make_cleanup (xfree, full_path);
-
- if (!file_is_auto_load_safe (full_path,
+ path_ptr = opened->full_path.get ();
+ if (!file_is_auto_load_safe (opened->full_path.get (),
_("auto-load: Loading %s script "
"\"%s\" from section \"%s\" of "
"objfile \"%s\".\n"),
- ext_lang_name (language), full_path,
+ ext_lang_name (language),
+ opened->full_path.get (),
section_name, objfile_name (objfile)))
- opened = 0;
+ opened.reset ();
}
else
{
- full_path = NULL;
+ path_ptr = 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,
@@ -986,14 +982,12 @@ source_script_file (struct auto_load_pspace_info *pspace_info,
section_name, offset);
}
- in_hash_table = maybe_add_script_file (pspace_info, opened, file, full_path,
- language);
+ in_hash_table = maybe_add_script_file (pspace_info, bool (opened), file,
+ path_ptr, language);
/* If this file is not currently loaded, load it. */
if (opened && !in_hash_table)
- sourcer (language, objfile, stream, full_path);
-
- do_cleanups (cleanups);
+ sourcer (language, objfile, opened->stream.get (), path_ptr);
}
/* Subroutine of source_section_scripts to simplify it.
diff --git a/gdb/cli/cli-cmds.c b/gdb/cli/cli-cmds.c
index af750d3..c33ddbe 100644
--- a/gdb/cli/cli-cmds.c
+++ b/gdb/cli/cli-cmds.c
@@ -502,22 +502,21 @@ show_script_ext_mode (struct ui_file *file, int from_tty,
/* Try to open SCRIPT_FILE.
If successful, the full path name is stored in *FULL_PATHP,
- the stream is stored in *STREAMP, and return 1.
- The caller is responsible for freeing *FULL_PATHP.
- If not successful, return 0; errno is set for the last file
+ and the stream is returned.
+ If not successful, return NULL; errno is set for the last file
we tried to open.
If SEARCH_PATH is non-zero, and the file isn't found in cwd,
search for it in the source search path. */
-int
-find_and_open_script (const char *script_file, int search_path,
- FILE **streamp, char **full_pathp)
+gdb::optional<open_script>
+find_and_open_script (const char *script_file, int search_path)
{
char *file;
int fd;
struct cleanup *old_cleanups;
int search_flags = OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH;
+ gdb::optional<open_script> opened;
file = tilde_expand (script_file);
old_cleanups = make_cleanup (xfree, file);
@@ -527,32 +526,33 @@ find_and_open_script (const char *script_file, int search_path,
/* Search for and open 'file' on the search path used for source
files. Put the full location in *FULL_PATHP. */
+ char *temp_path;
fd = openp (source_path, search_flags,
- file, O_RDONLY, full_pathp);
+ file, O_RDONLY, &temp_path);
+ gdb::unique_xmalloc_ptr<char> full_path (temp_path);
if (fd == -1)
{
int save_errno = errno;
do_cleanups (old_cleanups);
errno = save_errno;
- return 0;
+ return opened;
}
do_cleanups (old_cleanups);
- *streamp = fdopen (fd, FOPEN_RT);
- if (*streamp == NULL)
+ FILE *result = fdopen (fd, FOPEN_RT);
+ if (result == NULL)
{
int save_errno = errno;
close (fd);
- if (full_pathp)
- xfree (*full_pathp);
errno = save_errno;
- return 0;
}
+ else
+ opened.emplace (gdb_file_up (result), std::move (full_path));
- return 1;
+ return opened;
}
/* Load script FILE, which has already been opened as STREAM.
@@ -603,14 +603,12 @@ source_script_from_stream (FILE *stream, const char *file,
static void
source_script_with_search (const char *file, int from_tty, int search_path)
{
- FILE *stream;
- char *full_path;
- struct cleanup *old_cleanups;
if (file == NULL || *file == 0)
error (_("source command requires file name of file to source."));
- if (!find_and_open_script (file, search_path, &stream, &full_path))
+ gdb::optional<open_script> opened = find_and_open_script (file, search_path);
+ if (!opened)
{
/* The script wasn't found, or was otherwise inaccessible.
If the source command was invoked interactively, throw an
@@ -625,15 +623,13 @@ source_script_with_search (const char *file, int from_tty, int search_path)
}
}
- old_cleanups = make_cleanup (xfree, full_path);
- make_cleanup_fclose (stream);
/* The python support reopens the file, so we need to pass full_path here
in case the file was found on the search path. It's useful to do this
anyway so that error messages show the actual file used. But only do
this if we (may have) used search_path, as printing the full path in
errors for the non-search case can be more noise than signal. */
- source_script_from_stream (stream, file, search_path ? full_path : file);
- do_cleanups (old_cleanups);
+ source_script_from_stream (opened->stream.get (), file,
+ search_path ? opened->full_path.get () : file);
}
/* Wrapper around source_script_with_search to export it to main.c
diff --git a/gdb/cli/cli-cmds.h b/gdb/cli/cli-cmds.h
index 7ff1fca..1122a97 100644
--- a/gdb/cli/cli-cmds.h
+++ b/gdb/cli/cli-cmds.h
@@ -17,6 +17,9 @@
#if !defined (CLI_CMDS_H)
#define CLI_CMDS_H 1
+#include "common/filestuff.h"
+#include "common/gdb_optional.h"
+
/* Chain containing all defined commands. */
extern struct cmd_list_element *cmdlist;
@@ -117,8 +120,22 @@ extern void source_script (const char *, int);
/* Exported to objfiles.c. */
-extern int find_and_open_script (const char *file, int search_path,
- FILE **streamp, char **full_path);
+/* The script that was opened. */
+struct open_script
+{
+ gdb_file_up stream;
+ gdb::unique_xmalloc_ptr<char> full_path;
+
+ open_script (gdb_file_up &&stream_,
+ gdb::unique_xmalloc_ptr<char> &&full_path_)
+ : stream (std::move (stream_)),
+ full_path (std::move (full_path_))
+ {
+ }
+};
+
+extern gdb::optional<open_script>
+ find_and_open_script (const char *file, int search_path);
/* Command tracing state. */
--
2.9.3
next prev parent reply other threads:[~2017-07-25 17:27 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-25 17:24 [RFA v2 00/24] More miscellaneous C++-ification Tom Tromey
2017-07-25 17:21 ` [RFA v2 23/24] Use gdb_argv in Python Tom Tromey
2017-07-31 20:26 ` Simon Marchi
2017-07-25 17:21 ` [RFA v2 19/24] Replace do_restore_instream_cleanup with scoped_restore Tom Tromey
2017-07-25 17:21 ` [RFA v2 18/24] Use a scoped_restore for command_nest_depth Tom Tromey
2017-07-25 17:21 ` [RFA v2 22/24] Introduce gdb_argv, a class wrapper for buildargv Tom Tromey
2017-07-31 20:22 ` Simon Marchi
2017-07-25 17:22 ` [RFA v2 16/24] Remove in_user_command Tom Tromey
2017-07-25 17:22 ` [RFA v2 12/24] More uses of scoped_restore Tom Tromey
2017-07-25 17:22 ` [RFA v2 05/24] Use gdb_file_up in source.c Tom Tromey
2017-07-30 18:59 ` Simon Marchi
2017-07-25 17:24 ` [RFA v2 24/24] Remove make_cleanup_freeargv and gdb_buildargv Tom Tromey
2017-07-31 20:26 ` Simon Marchi
2017-07-25 17:24 ` [RFA v2 08/24] Remove an unlink cleanup Tom Tromey
2017-07-31 18:47 ` Simon Marchi
2017-07-25 17:24 ` [RFA v2 09/24] Remove close cleanup Tom Tromey
2017-07-31 19:09 ` Simon Marchi
2017-07-25 17:24 ` [RFA v2 06/24] Change open_terminal_stream to return a gdb_file_up Tom Tromey
2017-07-30 19:04 ` Simon Marchi
2017-07-25 17:25 ` [RFA v2 10/24] Remove make_cleanup_restore_current_language Tom Tromey
2017-07-31 19:21 ` Simon Marchi
2017-07-31 22:17 ` Tom Tromey
2017-08-01 8:44 ` Simon Marchi
2017-07-25 17:26 ` [RFA v2 02/24] Introduce and use gdb_file_up Tom Tromey
2017-07-29 23:40 ` Simon Marchi
2017-07-30 16:25 ` Tom Tromey
2017-07-30 18:31 ` Simon Marchi
2017-07-25 17:26 ` [RFA v2 04/24] Use gdb_file_up in fbsd-nat.c Tom Tromey
2017-07-29 23:56 ` Simon Marchi
2017-07-25 17:26 ` [RFA v2 21/24] Remove a cleanup in Python Tom Tromey
2017-07-25 17:26 ` [RFA v2 07/24] Remove make_cleanup_fclose Tom Tromey
2017-07-30 19:05 ` Simon Marchi
2017-07-25 17:26 ` [RFA v2 01/24] Introduce and use ui_out_emit_table Tom Tromey
2017-07-29 23:10 ` Simon Marchi
2017-07-30 16:23 ` Tom Tromey
2017-07-30 18:29 ` Simon Marchi
2017-07-31 22:12 ` Tom Tromey
2017-07-25 17:27 ` Tom Tromey [this message]
2017-07-29 23:54 ` [RFA v2 03/24] Change return type of find_and_open_script Simon Marchi
2017-07-30 16:27 ` Tom Tromey
2017-07-25 17:27 ` [RFA v2 13/24] Replace tui_restore_gdbout with scoped_restore Tom Tromey
2017-07-25 17:27 ` [RFA v2 15/24] Use containers to avoid cleanups Tom Tromey
2017-07-31 19:42 ` Simon Marchi
2017-07-25 17:27 ` [RFA v2 14/24] Use unique_xmalloc_ptr in jit.c Tom Tromey
2017-07-31 19:25 ` Simon Marchi
2017-07-25 17:51 ` [RFA v2 20/24] Avoid some manual memory management in Python Tom Tromey
2017-07-25 18:02 ` [RFA v2 17/24] Remove user_call_depth Tom Tromey
2017-07-31 19:46 ` Simon Marchi
2017-07-25 18:04 ` [RFA v2 11/24] Remove make_cleanup_free_so Tom Tromey
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