mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-23 07:14:28 +00:00
Rollup merge of #90427 - jkugelman:must-use-alloc-leak, r=joshtriplett
Add #[must_use] to alloc functions that would leak memory As [requested](https://github.com/rust-lang/rust/pull/89899#issuecomment-955600779) by `@joshtriplett.` > Please do go ahead and add the ones whose only legitimate use for ignoring the return value is leaking memory. (In a separate PR please.) I think it's sufficiently error-prone to call something like alloc and ignore the result that it's legitimate to require `let _ =` for that. I added `realloc` myself. Clippy ignored it because of its `mut` argument. ```rust alloc/src/alloc.rs:123:1 alloc unsafe fn realloc(ptr: *mut u8, layout: Layout, new_size: usize) -> *mut u8; ``` Parent issue: #89692 r? `@joshtriplett`
This commit is contained in:
commit
ff6d8ecd64
@ -81,6 +81,7 @@ pub use std::alloc::Global;
|
||||
/// }
|
||||
/// ```
|
||||
#[stable(feature = "global_alloc", since = "1.28.0")]
|
||||
#[must_use = "losing the pointer will leak memory"]
|
||||
#[inline]
|
||||
pub unsafe fn alloc(layout: Layout) -> *mut u8 {
|
||||
unsafe { __rust_alloc(layout.size(), layout.align()) }
|
||||
@ -117,6 +118,7 @@ pub unsafe fn dealloc(ptr: *mut u8, layout: Layout) {
|
||||
///
|
||||
/// See [`GlobalAlloc::realloc`].
|
||||
#[stable(feature = "global_alloc", since = "1.28.0")]
|
||||
#[must_use = "losing the pointer will leak memory"]
|
||||
#[inline]
|
||||
pub unsafe fn realloc(ptr: *mut u8, layout: Layout, new_size: usize) -> *mut u8 {
|
||||
unsafe { __rust_realloc(ptr, layout.size(), layout.align(), new_size) }
|
||||
@ -150,6 +152,7 @@ pub unsafe fn realloc(ptr: *mut u8, layout: Layout, new_size: usize) -> *mut u8
|
||||
/// }
|
||||
/// ```
|
||||
#[stable(feature = "global_alloc", since = "1.28.0")]
|
||||
#[must_use = "losing the pointer will leak memory"]
|
||||
#[inline]
|
||||
pub unsafe fn alloc_zeroed(layout: Layout) -> *mut u8 {
|
||||
unsafe { __rust_alloc_zeroed(layout.size(), layout.align()) }
|
||||
|
@ -804,6 +804,7 @@ impl<T: ?Sized> Arc<T> {
|
||||
/// let x_ptr = Arc::into_raw(x);
|
||||
/// assert_eq!(unsafe { &*x_ptr }, "hello");
|
||||
/// ```
|
||||
#[must_use = "losing the pointer will leak memory"]
|
||||
#[stable(feature = "rc_raw", since = "1.17.0")]
|
||||
pub fn into_raw(this: Self) -> *const T {
|
||||
let ptr = Self::as_ptr(&this);
|
||||
|
Loading…
Reference in New Issue
Block a user