[RFA 3/3] Remove cleanups from break-catch-syscall.c
Simon Marchi
simon.marchi@polymtl.ca
Thu Oct 19 21:00:00 GMT 2017
On 2017-10-18 00:06, Tom Tromey wrote:
> This removes the remaining cleanups from break-catch-syscall.c by
> storing temporary strings in a vector.
>
> ChangeLog
> 2017-10-17 Tom Tromey <tom@tromey.com>
>
> * break-catch-syscall.c (catch_syscall_completer): Use
> std::string, gdb::unique_xmalloc_ptr.
> ---
> gdb/ChangeLog | 5 +++++
> gdb/break-catch-syscall.c | 35 ++++++++++++++++++-----------------
> 2 files changed, 23 insertions(+), 17 deletions(-)
>
> diff --git a/gdb/break-catch-syscall.c b/gdb/break-catch-syscall.c
> index 01e761ce37..2bbfee0ac4 100644
> --- a/gdb/break-catch-syscall.c
> +++ b/gdb/break-catch-syscall.c
> @@ -560,9 +560,7 @@ catch_syscall_completer (struct cmd_list_element
> *cmd,
> const char *text, const char *word)
> {
> struct gdbarch *gdbarch = get_current_arch ();
> - struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
> - const char **group_list = NULL;
> - const char **syscall_list = NULL;
> + gdb::unique_xmalloc_ptr<const char *> group_list;
> const char *prefix;
> int i;
>
> @@ -575,34 +573,37 @@ catch_syscall_completer (struct cmd_list_element
> *cmd,
> if (startswith (prefix, "g:") || startswith (prefix, "group:"))
> {
> /* Perform completion inside 'group:' namespace only. */
> - group_list = get_syscall_group_names (gdbarch);
> + group_list.reset (get_syscall_group_names (gdbarch));
> if (group_list != NULL)
> - complete_on_enum (tracker, group_list, word, word);
> + complete_on_enum (tracker, group_list.get (), word, word);
> }
> else
> {
> /* Complete with both, syscall names and groups. */
> - syscall_list = get_syscall_names (gdbarch);
> - group_list = get_syscall_group_names (gdbarch);
> + gdb::unique_xmalloc_ptr<const char *> syscall_list
> + (get_syscall_names (gdbarch));
> + group_list.reset (get_syscall_group_names (gdbarch));
> +
> + const char **group_ptr = group_list.get ();
> +
> + /* Hold on to strings while we're using them. */
> + std::vector<std::string> holders;
>
> /* Append "group:" prefix to syscall groups. */
> - for (i = 0; group_list[i] != NULL; i++)
> + for (i = 0; group_ptr[i] != NULL; i++)
> {
> - char *prefixed_group = xstrprintf ("group:%s", group_list[i]);
> + std::string prefixed_group = string_printf ("group:%s",
> + group_ptr[i]);
>
> - group_list[i] = prefixed_group;
> - make_cleanup (xfree, prefixed_group);
> + group_ptr[i] = prefixed_group.c_str ();
> + holders.push_back (prefixed_group);
Maybe an opportunity to std::move? Alternatively:
holders.emplace_back (string_printf ("group:%s", group_ptr[i]));
group_ptr[i] = holders.back ().c_str ();
LGTM in any case, as well as the two previous patches.
Simon
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