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Auto merge of #1296 - RalfJung:rustup, r=RalfJung
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rustup for AllocRef changes

Cc rust-lang/rust#70362
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bors committed Apr 2, 2020
2 parents 094fec3 + 033eae5 commit 99221f7
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Showing 2 changed files with 10 additions and 9 deletions.
2 changes: 1 addition & 1 deletion rust-version
Original file line number Diff line number Diff line change
@@ -1 +1 @@
b793f403bdfbcc0ff3e15ed8177a81d79ba4a29b
127a11a344eb59b5aea1464e98257c262dcba967
17 changes: 9 additions & 8 deletions tests/run-pass/heap_allocator.rs
Original file line number Diff line number Diff line change
@@ -1,36 +1,37 @@
#![feature(allocator_api)]

use std::ptr::NonNull;
use std::alloc::{Global, AllocRef, Layout, System};
use std::alloc::{Global, AllocRef, Layout, System, AllocInit, ReallocPlacement};
use std::slice;

fn check_alloc<T: AllocRef>(mut allocator: T) { unsafe {
for &align in &[4, 8, 16, 32] {
let layout = Layout::from_size_align(20, align).unwrap();

for _ in 0..32 {
let a = allocator.alloc(layout).unwrap().0;
let a = allocator.alloc(layout, AllocInit::Uninitialized).unwrap().ptr;
assert_eq!(a.as_ptr() as usize % align, 0, "pointer is incorrectly aligned");
allocator.dealloc(a, layout);
}

let p1 = allocator.alloc_zeroed(layout).unwrap().0;
let p1 = allocator.alloc(layout, AllocInit::Zeroed).unwrap().ptr;
assert_eq!(p1.as_ptr() as usize % align, 0, "pointer is incorrectly aligned");

let p2 = allocator.realloc(p1, layout, 40).unwrap().0;
// old size < new size
let p2 = allocator.grow(p1, layout, 40, ReallocPlacement::MayMove, AllocInit::Uninitialized).unwrap().ptr;
let layout = Layout::from_size_align(40, align).unwrap();
assert_eq!(p2.as_ptr() as usize % align, 0, "pointer is incorrectly aligned");
let slice = slice::from_raw_parts(p2.as_ptr(), 20);
assert_eq!(&slice, &[0_u8; 20]);

// old size == new size
let p3 = allocator.realloc(p2, layout, 40).unwrap().0;
let p3 = allocator.grow(p2, layout, 40, ReallocPlacement::MayMove, AllocInit::Uninitialized).unwrap().ptr;
assert_eq!(p3.as_ptr() as usize % align, 0, "pointer is incorrectly aligned");
let slice = slice::from_raw_parts(p3.as_ptr(), 20);
assert_eq!(&slice, &[0_u8; 20]);

// old size > new size
let p4 = allocator.realloc(p3, layout, 10).unwrap().0;
let p4 = allocator.shrink(p3, layout, 10, ReallocPlacement::MayMove).unwrap().ptr;
let layout = Layout::from_size_align(10, align).unwrap();
assert_eq!(p4.as_ptr() as usize % align, 0, "pointer is incorrectly aligned");
let slice = slice::from_raw_parts(p4.as_ptr(), 10);
Expand All @@ -46,7 +47,7 @@ fn check_align_requests<T: AllocRef>(mut allocator: T) {
let iterations = 32;
unsafe {
let pointers: Vec<_> = (0..iterations).map(|_| {
allocator.alloc(Layout::from_size_align(size, align).unwrap()).unwrap().0
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,
Expand All @@ -67,7 +68,7 @@ fn global_to_box() {
let l = Layout::new::<T>();
// allocate manually with global allocator, then turn into Box and free there
unsafe {
let ptr = Global.alloc(l).unwrap().0.as_ptr() as *mut T;
let ptr = Global.alloc(l, AllocInit::Uninitialized).unwrap().ptr.as_ptr() as *mut T;
let b = Box::from_raw(ptr);
drop(b);
}
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