75 lines
3.0 KiB
Java
75 lines
3.0 KiB
Java
|
/*
|
||
|
|
* Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
|
||
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
||
|
|
*
|
||
|
|
* This code is free software; you can redistribute it and/or modify it
|
||
|
|
* under the terms of the GNU General Public License version 2 only, as
|
||
|
|
* published by the Free Software Foundation.
|
||
|
|
*
|
||
|
|
* This code is distributed in the hope that it will be useful, but WITHOUT
|
||
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||
|
|
* version 2 for more details (a copy is included in the LICENSE file that
|
||
|
|
* accompanied this code).
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License version
|
||
|
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
||
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
||
|
|
*
|
||
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
||
|
|
* or visit www.oracle.com if you need additional information or have any
|
||
|
|
* questions.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* @test
|
||
|
|
* @summary Test issues with instantiating hidden classes.
|
||
|
|
* @library /test/lib
|
||
|
|
* @modules jdk.compiler
|
||
|
|
* @run main InstantiateHiddenClass
|
||
|
|
*/
|
||
|
|
|
||
|
|
import java.lang.invoke.MethodType;
|
||
|
|
import java.lang.invoke.MethodHandles;
|
||
|
|
import java.lang.invoke.MethodHandles.Lookup;
|
||
|
|
import static java.lang.invoke.MethodHandles.Lookup.ClassOption.*;
|
||
|
|
import jdk.test.lib.compiler.InMemoryJavaCompiler;
|
||
|
|
|
||
|
|
public class InstantiateHiddenClass {
|
||
|
|
|
||
|
|
static byte klassbuf[] = InMemoryJavaCompiler.compile("TestClass",
|
||
|
|
"public class TestClass { " +
|
||
|
|
" public static void concat(String one, String two) throws Throwable { " +
|
||
|
|
" System.out.println(one + two);" +
|
||
|
|
" } } ");
|
||
|
|
|
||
|
|
public static void main(String[] args) throws Throwable {
|
||
|
|
|
||
|
|
// Test that a hidden class cannot be found through its name.
|
||
|
|
try {
|
||
|
|
Lookup lookup = MethodHandles.lookup();
|
||
|
|
Class<?> cl = lookup.defineHiddenClass(klassbuf, false, NESTMATE).lookupClass();
|
||
|
|
Class.forName(cl.getName()).newInstance();
|
||
|
|
throw new RuntimeException("Expected ClassNotFoundException not thrown");
|
||
|
|
} catch (ClassNotFoundException e ) {
|
||
|
|
// Test passed
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// Create two hidden classes and instantiate an object from each of them.
|
||
|
|
// Verify that the references to these objects are different and references
|
||
|
|
// to their classes are not equal either.
|
||
|
|
Lookup lookup = MethodHandles.lookup();
|
||
|
|
Class<?> c1 = lookup.defineHiddenClass(klassbuf, false, NESTMATE).lookupClass();
|
||
|
|
Class<?> c2 = lookup.defineHiddenClass(klassbuf, false, NESTMATE).lookupClass();
|
||
|
|
Object o1 = c1.newInstance();
|
||
|
|
Object o2 = c2.newInstance();
|
||
|
|
if (o1 == o2) {
|
||
|
|
throw new RuntimeException("Objects should not be equal");
|
||
|
|
}
|
||
|
|
if (o1.getClass() == o2.getClass()) {
|
||
|
|
throw new RuntimeException("Classes should not be equal");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|