| // Copyright 2012-2016 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| // ignore-emscripten |
| // compile-flags: -O |
| |
| // Tests that the `vec!` macro does not overflow the stack when it is |
| // given data larger than the stack. |
| |
| // FIXME(eddyb) Improve unoptimized codegen to avoid the temporary, |
| // and thus run successfully even when compiled at -C opt-level=0. |
| |
| const LEN: usize = 1 << 15; |
| |
| use std::thread::Builder; |
| |
| fn main() { |
| assert!(Builder::new().stack_size(LEN / 2).spawn(|| { |
| // FIXME(eddyb) this can be vec![[0: LEN]] pending |
| // https://llvm.org/bugs/show_bug.cgi?id=28987 |
| let vec = vec![unsafe { std::mem::zeroed::<[u8; LEN]>() }]; |
| assert_eq!(vec.len(), 1); |
| }).unwrap().join().is_ok()); |
| } |
