also add imported memory debug assert

sug0 · Jun 28, 2023 · 88ab394 · 88ab394
1 parent 9d7adb0
commit 88ab394
Showing 1 changed file with 9 additions and 1 deletion.
diff --git a/lib/vm/src/instance/mod.rs b/lib/vm/src/instance/mod.rs
@@ -270,7 +270,15 @@ impl Instance {
  /// Return the indexed `VMMemoryImport`.
  fn imported_memory(&self, index: MemoryIndex) -> &VMMemoryImport {
  let index = usize::try_from(index.as_u32()).unwrap();
- unsafe { &*self.imported_memories_ptr().add(index) }
+ let addr = unsafe { self.imported_memories_ptr().add(index) };
+ let align = std::mem::align_of::<VMMemoryImport>();
+ debug_assert!(
+ addr as usize % align == 0,
+ "VMMemoryImport addr is not aligned to {}: {:p}",
+ align,
+ addr
+ );
+ unsafe { &*addr }
  }
 
  /// Return a pointer to the `VMMemoryImport`s.