1 /* 2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 import jdk.internal.misc.Unsafe; 25 26 public class ClassLoaderNoUnnamedModule { 27 static final Unsafe UNSAFE = Unsafe.getUnsafe(); 28 29 class TestClass extends ClassLoader { 30 public boolean calledConstructor = false; 31 32 public TestClass() { 33 calledConstructor = true; 34 } 35 } 36 37 static void testConstructorCall() throws Exception { 38 // Use Unsafe allocateInstance to construct an instance of TestClass 39 // which does not invoke its super's, java.lang.ClassLoader, constructor. 40 // An unnamed module for this ClassLoader is not created. 41 TestClass tc = (TestClass)UNSAFE.allocateInstance(TestClass.class); 42 System.out.println("tc = " + tc + "tc's ctor called = " + tc.calledConstructor); 43 Module unnamed_module = tc.getUnnamedModule(); 44 if (unnamed_module == null) { 45 System.out.println("The unnamed module for this class loader is null"); 46 } 47 48 tc.loadClass(String.class.getName()); 49 Class.forName(String.class.getName(), false, tc); 50 } 51 52 public static void main(String args[]) throws Exception { 53 testConstructorCall(); 54 } 55 }