85 lines
2.8 KiB
Java
85 lines
2.8 KiB
Java
/*
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* Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @summary Verifies the behaviour of Unsafe.allocateInstance
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* @library /test/lib
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* @modules java.base/jdk.internal.misc
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* java.management
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* @run main AllocateInstance
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*/
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import jdk.internal.misc.Unsafe;
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import static jdk.test.lib.Asserts.*;
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public class AllocateInstance {
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static final Unsafe UNSAFE = Unsafe.getUnsafe();
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class TestClass {
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public boolean calledConstructor = false;
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public TestClass() {
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calledConstructor = true;
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}
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}
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static void testConstructorCall() throws InstantiationException {
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// allocateInstance() should not result in a call to the constructor
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TestClass tc = (TestClass)UNSAFE.allocateInstance(TestClass.class);
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assertFalse(tc.calledConstructor);
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}
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abstract class AbstractClass {
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public AbstractClass() {}
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}
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static void testAbstractClass() {
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try {
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AbstractClass ac = (AbstractClass) UNSAFE.allocateInstance(AbstractClass.class);
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throw new AssertionError("Should throw InstantiationException for an abstract class");
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} catch (InstantiationException e) {
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// Expected
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}
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}
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interface AnInterface {}
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static void testInterface() {
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try {
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AnInterface ai = (AnInterface) UNSAFE.allocateInstance(AnInterface.class);
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throw new AssertionError("Should throw InstantiationException for an interface");
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} catch (InstantiationException e) {
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// Expected
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}
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}
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public static void main(String args[]) throws Exception {
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for (int i = 0; i < 20_000; i++) {
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testConstructorCall();
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testAbstractClass();
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testInterface();
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}
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}
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}
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