diff options
Diffstat (limited to 'library/core/src/alloc/mod.rs')
| -rw-r--r-- | library/core/src/alloc/mod.rs | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/library/core/src/alloc/mod.rs b/library/core/src/alloc/mod.rs index a4bf6a853..a6082455f 100644 --- a/library/core/src/alloc/mod.rs +++ b/library/core/src/alloc/mod.rs @@ -169,8 +169,9 @@ pub unsafe trait Allocator { /// this, the allocator may extend the allocation referenced by `ptr` to fit the new layout. /// /// If this returns `Ok`, then ownership of the memory block referenced by `ptr` has been - /// transferred to this allocator. The memory may or may not have been freed, and should be - /// considered unusable. + /// transferred to this allocator. Any access to the old `ptr` is Undefined Behavior, even if the + /// allocation was grown in-place. The newly returned pointer is the only valid pointer + /// for accessing this memory now. /// /// If this method returns `Err`, then ownership of the memory block has not been transferred to /// this allocator, and the contents of the memory block are unaltered. @@ -295,8 +296,9 @@ pub unsafe trait Allocator { /// this, the allocator may shrink the allocation referenced by `ptr` to fit the new layout. /// /// If this returns `Ok`, then ownership of the memory block referenced by `ptr` has been - /// transferred to this allocator. The memory may or may not have been freed, and should be - /// considered unusable. + /// transferred to this allocator. Any access to the old `ptr` is Undefined Behavior, even if the + /// allocation was shrunk in-place. The newly returned pointer is the only valid pointer + /// for accessing this memory now. /// /// If this method returns `Err`, then ownership of the memory block has not been transferred to /// this allocator, and the contents of the memory block are unaltered. |