implement ptr.addr() via transmute

rust-lang-ci · Jun 3, 2022 · 4291332 · 4291332
1 parent 5e6bb83
commit 4291332
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Showing 2 changed files with 6 additions and 2 deletions.
diff --git a/library/core/src/ptr/const_ptr.rs b/library/core/src/ptr/const_ptr.rs
@@ -180,7 +180,9 @@ impl<T: ?Sized> *const T {
         T: Sized,
     {
         // FIXME(strict_provenance_magic): I am magic and should be a compiler intrinsic.
-        self as usize
+        // SAFETY: Pointer-to-integer transmutes are valid (if you are okay with losing the
+        // provenance).
+        unsafe { mem::transmute(self) }
     }
 
     /// Gets the "address" portion of the pointer, and 'exposes' the "provenance" part for future

diff --git a/library/core/src/ptr/mut_ptr.rs b/library/core/src/ptr/mut_ptr.rs
@@ -184,7 +184,9 @@ impl<T: ?Sized> *mut T {
         T: Sized,
     {
         // FIXME(strict_provenance_magic): I am magic and should be a compiler intrinsic.
-        self as usize
+        // SAFETY: Pointer-to-integer transmutes are valid (if you are okay with losing the
+        // provenance).
+        unsafe { mem::transmute(self) }
     }
 
     /// Gets the "address" portion of the pointer, and 'exposes' the "provenance" part for future