mirror of
https://github.com/rust-lang/rust.git
synced 2026-05-30 04:56:25 +03:00
Alex Crichton
cc7590341a
This commit deletes the `alloc_system` crate from the standard distribution. This unstable crate is no longer needed in the modern stable global allocator world, but rather its functionality is folded directly into the standard library. The standard library was already the only stable location to access this crate, and as a result this should not affect any stable code.
43 lines
1.3 KiB
Rust
43 lines
1.3 KiB
Rust
// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use std::alloc::{Global, Alloc, Layout, System};
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/// https://github.com/rust-lang/rust/issues/45955
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#[test]
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fn alloc_system_overaligned_request() {
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check_overalign_requests(System)
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}
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#[test]
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fn std_heap_overaligned_request() {
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check_overalign_requests(Global)
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}
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fn check_overalign_requests<T: Alloc>(mut allocator: T) {
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let size = 8;
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let align = 16; // greater than size
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let iterations = 100;
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unsafe {
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let pointers: Vec<_> = (0..iterations).map(|_| {
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allocator.alloc(Layout::from_size_align(size, align).unwrap()).unwrap()
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}).collect();
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for &ptr in &pointers {
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assert_eq!((ptr.as_ptr() as usize) % align, 0,
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"Got a pointer less aligned than requested")
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}
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// Clean up
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for &ptr in &pointers {
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allocator.dealloc(ptr, Layout::from_size_align(size, align).unwrap())
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}
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}
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}
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