{"ast_node_type":"other","tokens":[{"end":43,"kind":"keyword","start":0,"text":"alt_stack.ss_size"}]}
        alt_stack.ss_size = alt_stack_size;
        alt_stack.ss_sp = alloc(Layout::from_size_align(alt_stack_size, 1).unwrap()).cast();
        libc::sigaltstack(&alt_stack, ptr::null_mut());