GET_HDR_ADDR      243 gc/headers.c       GET_HDR_ADDR(h, ha);
GET_HDR_ADDR      219 gc/include/private/gc_hdrs.h #   define GET_HDR(p, hhdr) { register hdr ** _ha; GET_HDR_ADDR(p, _ha); \
GET_HDR_ADDR      221 gc/include/private/gc_hdrs.h #   define SET_HDR(p, hhdr) { register hdr ** _ha; GET_HDR_ADDR(p, _ha); \