gc_info_decode   6746 gc.c               return gc_info_decode(objspace, key, 0);
gc_info_decode   6774 gc.c               return gc_info_decode(objspace, arg, 0);
gc_info_decode   8780 gc.c           	rb_hash_aset(prof, ID2SYM(rb_intern("GC_FLAGS")), gc_info_decode(0, rb_hash_new(), record->flags));