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Ralf Jung 2024-05-24 10:10:07 +02:00 • committed by GitHub
parent 1b374dfd9b
commit b84620ff17
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1 changed files with 3 additions and 2 deletions
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5
src/tools/miri/src/alloc_bytes.rs
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@ -14,8 +14,7 @@ pub struct MiriAllocBytes {
layout: alloc::Layout,
/// Pointer to the allocation contents.
/// Invariant:
/// * If `self.layout.size() == 0`, then `self.ptr` is some suitably aligned pointer
/// that was allocated with the same layout but `size == 1`.
/// * If `self.layout.size() == 0`, then `self.ptr` was allocated with the equivalent layout with size 1.
/// * Otherwise, `self.ptr` points to memory allocated with `self.layout`.
ptr: *mut u8,
}
@ -30,6 +29,8 @@ impl Clone for MiriAllocBytes {
impl Drop for MiriAllocBytes {
fn drop(&mut self) {
// We have to reconstruct the actual layout used for allocation.
// (`Deref` relies on `size` so we can't just always set it to at least 1.)
let alloc_layout = if self.layout.size() == 0 {
Layout::from_size_align(1, self.layout.align()).unwrap()
} else {