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worktree: fix a trivial leak in prune_worktrees()

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We were leaking both the "struct strbuf" in prune_worktrees(), as well
as the "path" we got from should_prune_worktree(). Since these were
the only two uses of the "struct string_list" let's change it to a
"DUP" and push these to it with "string_list_append_nodup()".

For the string_list_append_nodup() we could also string_list_append()
the main_path.buf, and then strbuf_release(&main_path) right away. But
doing it this way avoids an allocation, as we already have the "struct
strbuf" prepared for appending to "kept".

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ævar Arnfjörð Bjarmason 2023-02-07 00:07:43 +01:00 committed by Junio C Hamano
parent 90428ddccf
commit 9f24f3c719
3 changed files with 5 additions and 3 deletions
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6
builtin/worktree.c
View File

@ -173,7 +173,7 @@ static void prune_worktrees(void)
{
struct strbuf reason = STRBUF_INIT;
struct strbuf main_path = STRBUF_INIT;
struct string_list kept = STRING_LIST_INIT_NODUP;
struct string_list kept = STRING_LIST_INIT_DUP;
DIR *dir = opendir(git_path("worktrees"));
struct dirent *d;
if (!dir)
@ -184,14 +184,14 @@ static void prune_worktrees(void)
if (should_prune_worktree(d->d_name, &reason, &path, expire))
prune_worktree(d->d_name, reason.buf);
else if (path)
string_list_append(&kept, path)->util = xstrdup(d->d_name);
string_list_append_nodup(&kept, path)->util = xstrdup(d->d_name);
}
closedir(dir);
strbuf_add_absolute_path(&main_path, get_git_common_dir());
/* massage main worktree absolute path to match 'gitdir' content */
strbuf_strip_suffix(&main_path, "/.");
string_list_append(&kept, strbuf_detach(&main_path, NULL));
string_list_append_nodup(&kept, strbuf_detach(&main_path, NULL));
prune_dups(&kept);
string_list_clear(&kept, 1);

1
t/t2401-worktree-prune.sh
View File

@ -5,6 +5,7 @@ test_description='prune $GIT_DIR/worktrees'
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh
test_expect_success initialize '

1
t/t2406-worktree-repair.sh
View File

@ -2,6 +2,7 @@
test_description='test git worktree repair'
TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh
test_expect_success setup '