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54a0048b | 1 | // Copyright 2012-2016 The Rust Project Developers. See the COPYRIGHT |
223e47cc LB |
2 | // file at the top-level directory of this distribution and at |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
5 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | |
6 | // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | |
7 | // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | |
8 | // option. This file may not be copied, modified, or distributed | |
9 | // except according to those terms. | |
10 | ||
5bcae85e | 11 | // ignore-emscripten |
9e0c209e | 12 | // compile-flags: -O |
5bcae85e | 13 | |
54a0048b SL |
14 | // Tests that the `vec!` macro does not overflow the stack when it is |
15 | // given data larger than the stack. | |
1a4d82fc | 16 | |
9e0c209e SL |
17 | // FIXME(eddyb) Improve unoptimized codegen to avoid the temporary, |
18 | // and thus run successfully even when compiled at -C opt-level=0. | |
19 | ||
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20 | const LEN: usize = 1 << 15; |
21 | ||
22 | use std::thread::Builder; | |
223e47cc | 23 | |
970d7e83 | 24 | fn main() { |
54a0048b | 25 | assert!(Builder::new().stack_size(LEN / 2).spawn(|| { |
9e0c209e SL |
26 | // FIXME(eddyb) this can be vec![[0: LEN]] pending |
27 | // https://llvm.org/bugs/show_bug.cgi?id=28987 | |
28 | let vec = vec![unsafe { std::mem::zeroed::<[u8; LEN]>() }]; | |
54a0048b SL |
29 | assert_eq!(vec.len(), 1); |
30 | }).unwrap().join().is_ok()); | |
223e47cc | 31 | } |