Increment the packed_ref_cache reference count while it is locked to
prevent its being freed.
Signed-off-by: Michael Haggerty <mhagger@xxxxxxxxxxxx>
---
refs.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/refs.c b/refs.c
index f33d224..a5a5b5d 100644
--- a/refs.c
+++ b/refs.c
@@ -820,7 +820,9 @@ struct packed_ref_cache {
/*
* Iff the packed-refs file associated with this instance is
* currently locked for writing, this points at the associated
- * lock (which is owned by somebody else).
+ * lock (which is owned by somebody else). The referrer count
+ * is also incremented when the file is locked and decremented
+ * when it is unlocked.
*/
struct lock_file *lock;
};
@@ -2099,6 +2101,8 @@ int lock_packed_refs(int flags)
/* Read the current packed-refs while holding the lock: */
packed_ref_cache = get_packed_ref_cache(&ref_cache);
packed_ref_cache->lock = &packlock;
+ /* Increment the reference count to prevent it from being freed: */
+ acquire_packed_ref_cache(packed_ref_cache);
return 0;
}
@@ -2119,6 +2123,7 @@ int commit_packed_refs(void)
if (commit_lock_file(packed_ref_cache->lock))
error = -1;
packed_ref_cache->lock = NULL;
+ release_packed_ref_cache(packed_ref_cache);
return error;
}
@@ -2131,6 +2136,7 @@ void rollback_packed_refs(void)
die("internal error: packed-refs not locked");
rollback_lock_file(packed_ref_cache->lock);
packed_ref_cache->lock = NULL;
+ release_packed_ref_cache(packed_ref_cache);
clear_packed_ref_cache(&ref_cache);
}
--
1.8.3.1
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