1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
use std::alloc::{AllocInit, AllocRef, Global, Layout, System};
/// Issue #45955 and #62251.
#[test]
fn alloc_system_overaligned_request() {
check_overalign_requests(System)
}
#[test]
fn std_heap_overaligned_request() {
check_overalign_requests(Global)
}
fn check_overalign_requests<T: AllocRef>(mut allocator: T) {
for &align in &[4, 8, 16, 32] {
// less than and bigger than `MIN_ALIGN`
for &size in &[align / 2, align - 1] {
// size less than alignment
let iterations = 128;
unsafe {
let pointers: Vec<_> = (0..iterations)
.map(|_| {
allocator
.alloc(
Layout::from_size_align(size, align).unwrap(),
AllocInit::Uninitialized,
)
.unwrap()
.ptr
})
.collect();
for &ptr in &pointers {
assert_eq!(
(ptr.as_ptr() as usize) % align,
0,
"Got a pointer less aligned than requested"
)
}
// Clean up
for &ptr in &pointers {
allocator.dealloc(ptr, Layout::from_size_align(size, align).unwrap())
}
}
}
}
}
|
