Refactor the existing reset_topo_walk() into a thin wrapper for a
release_revisions_topo_walk_info() + resetting the member to "NULL",
and call release_revisions_topo_walk_info() from release_revisions().
This fixes memory leaks that have been with us ever since
"topo_walk_info" was added to revision.[ch] in
f0d9cc4196a (revision.c: begin refactoring --topo-order logic,
2018-11-01).
Due to various other leaks this makes no tests pass in their entirety,
but e.g. before this running this on git.git:
./git -P log --pretty=tformat:"%P %H | %s" --parents --full-history --topo-order -3 -- README.md
Would report under SANITIZE=leak:
SUMMARY: LeakSanitizer: 531064 byte(s) leaked in 6 allocation(s).
Now we'll free all of that memory.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
---
revision.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/revision.c b/revision.c
index 307f41e8891..0107ac1077a 100644
--- a/revision.c
+++ b/revision.c
@@ -2943,6 +2943,8 @@ static void release_revisions_mailmap(struct string_list *mailmap)
free(mailmap);
}
+static void release_revisions_topo_walk_info(struct topo_walk_info *info);
+
void release_revisions(struct rev_info *revs)
{
free_commit_list(revs->commits);
@@ -2956,6 +2958,7 @@ void release_revisions(struct rev_info *revs)
free_grep_patterns(&revs->grep_filter);
diff_free(&revs->pruning);
reflog_walk_info_release(revs->reflog_info);
+ release_revisions_topo_walk_info(revs->topo_walk_info);
}
static void add_child(struct rev_info *revs, struct commit *parent, struct commit *child)
@@ -3468,17 +3471,22 @@ static void compute_indegrees_to_depth(struct rev_info *revs,
indegree_walk_step(revs);
}
-static void reset_topo_walk(struct rev_info *revs)
+static void release_revisions_topo_walk_info(struct topo_walk_info *info)
{
- struct topo_walk_info *info = revs->topo_walk_info;
-
+ if (!info)
+ return;
clear_prio_queue(&info->explore_queue);
clear_prio_queue(&info->indegree_queue);
clear_prio_queue(&info->topo_queue);
clear_indegree_slab(&info->indegree);
clear_author_date_slab(&info->author_date);
+ free(info);
+}
- FREE_AND_NULL(revs->topo_walk_info);
+static void reset_topo_walk(struct rev_info *revs)
+{
+ release_revisions_topo_walk_info(revs->topo_walk_info);
+ revs->topo_walk_info = NULL;
}
static void init_topo_walk(struct rev_info *revs)
--
2.36.0.rc2.843.g193535c2aa7
