mikros/rust
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

test more possible overaligned requests

Browse Source
This commit is contained in:
Ralf Jung 2019-07-02 12:56:51 +02:00
parent 576369bfce
commit 45e7ba96cb
1 changed files with 17 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
src/liballoc/tests/heap.rs
View File

@ -1,6 +1,6 @@
use std::alloc::{Global, Alloc, Layout, System};
/// Issue #45955.
/// Issue #45955 and #62251.
#[test]
fn alloc_system_overaligned_request() {
check_overalign_requests(System)
@ -12,21 +12,23 @@ fn std_heap_overaligned_request() {
}
fn check_overalign_requests<T: Alloc>(mut allocator: T) {
let size = 8;
let align = 16; // greater than size
let iterations = 100;
unsafe {
let pointers: Vec<_> = (0..iterations).map(|_| {
allocator.alloc(Layout::from_size_align(size, align).unwrap()).unwrap()
}).collect();
for &ptr in &pointers {
assert_eq!((ptr.as_ptr() as usize) % align, 0,
"Got a pointer less aligned than requested")
}
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()).unwrap()
}).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())
// Clean up
for &ptr in &pointers {
allocator.dealloc(ptr, Layout::from_size_align(size, align).unwrap())
}
}
}
}
}