src/jdk.incubator.foreign/share/classes/jdk/internal/foreign/abi/SharedUtils.java

@@ -319,10 +319,17 @@
              }
          }
          return handle;
      }
  
+     static void checkType(Class<?> actualType, Class<?> expectedType) {
+         if (expectedType != actualType) {
+             throw new IllegalArgumentException(
+                     String.format("Invalid operand type: %s. %s expected", actualType, expectedType));
+         }
+     }
+ 
      public static class SimpleVaArg {
          public final Class<?> carrier;
          public final MemoryLayout layout;
          public final Object value;