41 lines
1.4 KiB
Rust
41 lines
1.4 KiB
Rust
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// 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 alloc_system::System;
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use std::heap::{Heap, Alloc, Layout};
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/// https://github.com/rust-lang/rust/issues/45955
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///
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/// Note that `#[global_allocator]` is not used,
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/// so `liballoc_jemalloc` is linked (on some platforms).
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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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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 usize) % align, 0, "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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