100 lines
2.1 KiB
Rust
100 lines
2.1 KiB
Rust
//@ run-pass
|
|
#![allow(dead_code)]
|
|
#![allow(unused_unsafe)]
|
|
|
|
// Issue #2303
|
|
|
|
#![feature(core_intrinsics, rustc_attrs)]
|
|
|
|
use std::mem;
|
|
use std::intrinsics;
|
|
|
|
// This is the type with the questionable alignment
|
|
#[derive(Debug)]
|
|
struct Inner {
|
|
c64: u64
|
|
}
|
|
|
|
// This is the type that contains the type with the
|
|
// questionable alignment, for testing
|
|
#[derive(Debug)]
|
|
struct Outer {
|
|
c8: u8,
|
|
t: Inner
|
|
}
|
|
|
|
#[cfg(any(
|
|
target_os = "android",
|
|
target_os = "dragonfly",
|
|
target_os = "freebsd",
|
|
target_os = "fuchsia",
|
|
target_os = "hurd",
|
|
target_os = "illumos",
|
|
target_os = "linux",
|
|
target_os = "netbsd",
|
|
target_os = "openbsd",
|
|
target_os = "solaris",
|
|
target_os = "vxworks",
|
|
target_os = "nto",
|
|
target_vendor = "apple",
|
|
))]
|
|
mod m {
|
|
#[cfg(target_arch = "x86")]
|
|
pub mod m {
|
|
pub fn align() -> usize { 4 }
|
|
pub fn size() -> usize { 12 }
|
|
}
|
|
|
|
#[cfg(not(target_arch = "x86"))]
|
|
pub mod m {
|
|
pub fn align() -> usize { 8 }
|
|
pub fn size() -> usize { 16 }
|
|
}
|
|
}
|
|
|
|
#[cfg(target_env = "sgx")]
|
|
mod m {
|
|
#[cfg(target_arch = "x86_64")]
|
|
pub mod m {
|
|
pub fn align() -> usize { 8 }
|
|
pub fn size() -> usize { 16 }
|
|
}
|
|
}
|
|
|
|
#[cfg(target_os = "windows")]
|
|
mod m {
|
|
pub mod m {
|
|
pub fn align() -> usize { 8 }
|
|
pub fn size() -> usize { 16 }
|
|
}
|
|
}
|
|
|
|
#[cfg(target_family = "wasm")]
|
|
mod m {
|
|
pub mod m {
|
|
pub fn align() -> usize { 8 }
|
|
pub fn size() -> usize { 16 }
|
|
}
|
|
}
|
|
|
|
pub fn main() {
|
|
unsafe {
|
|
let x = Outer {c8: 22, t: Inner {c64: 44}};
|
|
|
|
let y = format!("{:?}", x);
|
|
|
|
println!("align inner = {:?}", intrinsics::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!(intrinsics::min_align_of::<Inner>(), m::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::m::size());
|
|
|
|
assert_eq!(y, "Outer { c8: 22, t: Inner { c64: 44 } }".to_string());
|
|
}
|
|
}
|