The `bb_commit` commit slab is used by the pack-bitmap-write machinery
to track various pieces of bookkeeping used to generate reachability
bitmaps.
Even though we clear the slab when freeing the bitmap_builder struct
(with `bitmap_builder_clear()`), there are still pointers which point to
locations in memory that have not yet been freed, resulting in a leak.
Plug the leak by introducing a suitable `free_fn` for the `struct
bb_commit` type, and make sure it is called on each member of the slab
via the `deep_clear_bb_data()` function.
Note that it is possible for both of the arguments to `bitmap_free()` to
be NULL, but `bitmap_free()` is a noop for NULL arguments, so it is OK
to pass them unconditionally.
Signed-off-by: Taylor Blau <me@xxxxxxxxxxxx>
---
pack-bitmap-write.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/pack-bitmap-write.c b/pack-bitmap-write.c
index f4ecdf8b0e..ae37fb6976 100644
--- a/pack-bitmap-write.c
+++ b/pack-bitmap-write.c
@@ -198,6 +198,13 @@ struct bb_commit {
unsigned idx; /* within selected array */
};
+static void clear_bb_commit(struct bb_commit *commit)
+{
+ free_commit_list(commit->reverse_edges);
+ bitmap_free(commit->commit_mask);
+ bitmap_free(commit->bitmap);
+}
+
define_commit_slab(bb_data, struct bb_commit);
struct bitmap_builder {
@@ -339,7 +346,7 @@ static void bitmap_builder_init(struct bitmap_builder *bb,
static void bitmap_builder_clear(struct bitmap_builder *bb)
{
- clear_bb_data(&bb->data);
+ deep_clear_bb_data(&bb->data, clear_bb_commit);
free(bb->commits);
bb->commits_nr = bb->commits_alloc = 0;
}
--
2.43.0.102.ga31d690331.dirty
