hidden_key         42 gc/finalize.c      word hidden_key;
hidden_key         51 gc/finalize.c  #   define dl_hidden_link prolog.hidden_key
hidden_key         69 gc/finalize.c  #   define fo_hidden_base prolog.hidden_key
hidden_key        125 gc/finalize.c          register ptr_t real_key = (ptr_t)REVEAL_POINTER(p -> hidden_key);