libfringe/tests/fpe.rs

42 lines
1.0 KiB
Rust

// This file is part of libfringe, a low-level green threading library.
// Copyright (c) Ben Segall <talchas@gmail.com>
// Copyright (c) edef <edef@edef.eu>
// See the LICENSE file included in this distribution.
#![cfg(target_os = "linux")]
#![feature(test)]
#![feature(thread_local)]
#![feature(asm)]
extern crate fringe;
extern crate test;
use fringe::Context;
use test::black_box;
#[thread_local]
static mut ctx_slot: *mut Context<fringe::OsStack> = 0 as *mut Context<_>;
const FE_DIVBYZERO: i32 = 0x4;
extern {
fn feenableexcept(except: i32) -> i32;
}
#[test]
#[ignore]
fn fpe() {
unsafe extern "C" fn universe_destroyer(_arg: usize) -> ! {
loop {
println!("{:?}", 1.0/black_box(0.0));
Context::swap(ctx_slot, ctx_slot, 0);
}
}
unsafe {
let stack = fringe::OsStack::new(4 << 20).unwrap();
let mut ctx = Context::new(stack, universe_destroyer);
ctx_slot = &mut ctx;
Context::swap(ctx_slot, ctx_slot, 0);
feenableexcept(FE_DIVBYZERO);
Context::swap(ctx_slot, ctx_slot, 0);
}
}