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dir.c: free "ident" and "exclude_per_dir" in "struct untracked_cache"

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When the "ident" member of the structure was added in
1e8fef609e (untracked cache: guard and disable on system changes,
2015-03-08) this function wasn't updated to free it. Let's do so.

Let's also free the "exclude_per_dir" memory we've been leaking
since[1], while making sure not to free() the constant ".gitignore"
string we add by default[2].

As we now have three struct members we're freeing let's change
free_untracked_cache() to return early if "uc" isn't defined. We won't
hand it to free() now, but that was just for convenience, once we're
dealing with >=2 struct members this pattern is more convenient.

1. f9e6c64958 (untracked cache: load from UNTR index extension,
   2015-03-08)
2. 039bc64e88 (core.excludesfile clean-up, 2007-11-14)

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
This commit is contained in:
Ævar Arnfjörð Bjarmason 2022-11-08 19:17:41 +01:00 committed by Junio C Hamano
parent b5fcb1c006
commit 083fd1a264
2 changed files with 8 additions and 3 deletions
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8
dir.c
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@ -3581,7 +3581,11 @@ static void free_untracked(struct untracked_cache_dir *ucd)
void free_untracked_cache(struct untracked_cache *uc)
{
if (uc)
if (!uc)
return;
free(uc->exclude_per_dir_to_free);
strbuf_release(&uc->ident);
free_untracked(uc->root);
free(uc);
}
@ -3739,7 +3743,7 @@ struct untracked_cache *read_untracked_extension(const void *data, unsigned long
next + offset + hashsz);
uc->dir_flags = get_be32(next + ouc_offset(dir_flags));
exclude_per_dir = (const char *)next + exclude_per_dir_offset;
uc->exclude_per_dir = xstrdup(exclude_per_dir);
uc->exclude_per_dir = uc->exclude_per_dir_to_free = xstrdup(exclude_per_dir);
/* NUL after exclude_per_dir is covered by sizeof(*ouc) */
next += exclude_per_dir_offset + strlen(exclude_per_dir) + 1;
if (next >= end)

1
dir.h
View File

@ -188,6 +188,7 @@ struct untracked_cache {
struct oid_stat ss_info_exclude;
struct oid_stat ss_excludes_file;
const char *exclude_per_dir;
char *exclude_per_dir_to_free;
struct strbuf ident;
/*
* dir_struct#flags must match dir_flags or the untracked