45 lines
1.3 KiB
Rust
45 lines
1.3 KiB
Rust
use std::alloc::{AllocRef, Global, Layout, System};
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/// Issue #45955 and #62251.
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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: AllocRef>(allocator: T) {
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for &align in &[4, 8, 16, 32] {
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// less than and bigger than `MIN_ALIGN`
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for &size in &[align / 2, align - 1] {
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// size less than alignment
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let iterations = 128;
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unsafe {
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let pointers: Vec<_> = (0..iterations)
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.map(|_| {
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allocator.alloc(Layout::from_size_align(size, align).unwrap()).unwrap()
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})
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.collect();
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for &ptr in &pointers {
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assert_eq!(
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(ptr.as_non_null_ptr().as_ptr() as usize) % align,
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0,
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"Got a pointer less aligned than requested"
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)
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}
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// Clean up
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for &ptr in &pointers {
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allocator.dealloc(
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ptr.as_non_null_ptr(),
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Layout::from_size_align(size, align).unwrap(),
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)
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}
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}
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}
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}
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}
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