| // Copyright 2012-2014 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. |
| |
| // Issue #2303 |
| |
| #![feature(intrinsics)] |
| |
| extern crate debug; |
| |
| use std::mem; |
| |
| mod rusti { |
| extern "rust-intrinsic" { |
| pub fn pref_align_of<T>() -> uint; |
| pub fn min_align_of<T>() -> uint; |
| } |
| } |
| |
| // This is the type with the questionable alignment |
| struct Inner { |
| c64: u32 |
| } |
| |
| // This is the type that contains the type with the |
| // questionable alignment, for testing |
| struct Outer { |
| c8: u8, |
| t: Inner |
| } |
| |
| |
| #[cfg(target_arch = "x86")] |
| #[cfg(target_arch = "arm")] |
| mod m { |
| pub fn align() -> uint { 4u } |
| pub fn size() -> uint { 8u } |
| } |
| |
| #[cfg(target_arch = "x86_64")] |
| mod m { |
| pub fn align() -> uint { 4u } |
| pub fn size() -> uint { 8u } |
| } |
| |
| pub fn main() { |
| unsafe { |
| let x = Outer {c8: 22u8, t: Inner {c64: 44u32}}; |
| |
| // Send it through the shape code |
| let y = format!("{:?}", x); |
| |
| println!("align inner = {:?}", rusti::min_align_of::<Inner>()); |
| println!("size outer = {:?}", mem::size_of::<Outer>()); |
| println!("y = {}", y); |
| |
| // per clang/gcc the alignment of `inner` is 4 on x86. |
| assert_eq!(rusti::min_align_of::<Inner>(), m::align()); |
| |
| // per clang/gcc the size of `outer` should be 12 |
| // because `inner`s alignment was 4. |
| assert_eq!(mem::size_of::<Outer>(), m::size()); |
| |
| assert_eq!(y, "Outer{c8: 22u8, t: Inner{c64: 44u32}}".to_string()); |
| } |
| } |