gc_start          833 gc.c           static int  gc_start(rb_objspace_t *objspace, const int full_mark, const int immediate_mark, const unsigned int immediate_sweep, int reason);
gc_start         1691 gc.c           	gc_start(objspace, FALSE, FALSE, FALSE, GPR_FLAG_NEWOBJ) == FALSE) {
gc_start         6267 gc.c               return gc_start(objspace, full_mark, immediate_mark, immediate_sweep, reason);