tdb2: test: fix run-57-die-during-transaction.c to be more efficient.

We track malloc and free, but we didn't catch the free() inside
external_agent, which means that our list of allocations keeps
growing.  Particularly under valgrind, which re-uses memory less than
the glibc allocator.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
(Imported from CCAN commit d9cbd7d4454ae35e4e2f6d18a9469bf26948e4b9)

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/tdb2/test/external-agent.h b/lib/tdb2/test/external-agent.h
index 9eada10750..cf9789b669 100644
--- a/lib/tdb2/test/external-agent.h
+++ b/lib/tdb2/test/external-agent.h
@@ -35,6 +35,9 @@ enum agent_return external_agent_operation(struct agent *handle,
 					   enum operation op,
 					   const char *name);
 
+/* Hook into free() on tdb_data in external agent. */
+void (*external_agent_free)(void *);
+
 /* Mapping enum -> string. */
 const char *agent_return_name(enum agent_return ret);
 const char *operation_name(enum operation op);