#ifdef LISP_FEATURE_SB_SAFEPOINT
block_blockable_signals(0, 0);
gc_alloc_update_page_tables(BOXED_PAGE_FLAG, &th->alloc_region);
#ifdef LISP_FEATURE_SB_SAFEPOINT
block_blockable_signals(0, 0);
gc_alloc_update_page_tables(BOXED_PAGE_FLAG, &th->alloc_region);