add (ignored) test for floating point exception state

Thanks, @talchas!
Fix #13
This commit is contained in:
edef 2015-07-20 23:36:45 -04:00
parent 368fa9d3bf
commit be21d75814
1 changed files with 42 additions and 0 deletions

42
tests/fpe.rs Normal file
View File

@ -0,0 +1,42 @@
// This file is part of libfringe, a low-level green threading library.
// Copyright (c) 2015, Ben Segall <talchas@gmail.com>
// Copyright (c) 2015, 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<'static, fringe::OsStack> = 0 as *mut Context<_>;
const FE_DIVBYZERO: i32 = 0x4;
extern {
fn feenableexcept(except: i32) -> i32;
}
#[test]
#[ignore]
fn fpe() {
unsafe {
let stack = fringe::OsStack::new(4 << 20).unwrap();
let mut ctx = Context::new(stack, move || {
println!("it's alive!");
loop {
println!("{:?}", 1.0/black_box(0.0));
Context::swap(ctx_slot, ctx_slot);
}
});
ctx_slot = &mut ctx;
Context::swap(ctx_slot, ctx_slot);
feenableexcept(FE_DIVBYZERO);
Context::swap(ctx_slot, ctx_slot);
}
}