throw CloneNotSupportedException if Object.clone called on non-Cloneable

src/avian/classpath-common.h

@@ -260,11 +260,14 @@ clone(Thread* t, object o)
     memcpy(clone, o, size);
     // clear any object header flags:
     setObjectClass(t, o, objectClass(t, o));
-  } else {
+  } else if (instanceOf(t, type(t, Machine::CloneableType), o)) {
     clone = make(t, class_);
     memcpy(reinterpret_cast<void**>(clone) + 1,
            reinterpret_cast<void**>(o) + 1,
            size - BytesPerWord);
+  } else {
+    throwNew(t, Machine::CloneNotSupportedExceptionType, "%s",
+             &byteArrayBody(t, className(t, objectClass(t, o)), 0)); 
   }
 
   return clone;

src/types.def

@@ -226,6 +226,8 @@
 
 (type negativeArraySizeException java/lang/NegativeArraySizeException)
 
+(type cloneNotSupportedException java/lang/CloneNotSupportedException)
+
 (type reflectiveOperationException java/lang/ReflectiveOperationException)
 
 (type classCastException java/lang/ClassCastException)

vm.pro

@@ -54,6 +54,7 @@
 -keep public class java.lang.ArrayIndexOutOfBoundsException
 -keep public class java.lang.ArrayStoreException
 -keep public class java.lang.NegativeArraySizeException
+-keep public class java.lang.CloneNotSupportedException
 -keep public class java.lang.ClassCastException
 -keep public class java.lang.ClassNotFoundException
 -keep public class java.lang.NullPointerException