mdb_tdb_ops_t
const mdb_tdb_ops_t *ops;
const mdb_tdb_ops_t *p_tdb_ops; /* libthread_db ops */
const mdb_tdb_ops_t *
mdb_tdb_ops_t tdb_ops; /* Ops vector for this library */
extern const mdb_tdb_ops_t *mdb_tdb_load(const char *);