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 25 /* 26 * @test 27 * @compile pkg/Grand.java pkg/Parent.java pkg/ClassLoaderForParentFoo.java 28 * @compile pkg/ClassLoaderForChildGrandFoo.java pkg/Child.jasm 29 * @run main/othervm LdrCnstrFldMsgTest 30 */ 31 32 import java.lang.reflect.Method; 33 34 // Check that LinkageError loader constraint message for fields contains the 35 // correct information. 36 // 37 // The test creates two class loaders. The first class loader loads classes 38 // Child, Foo, and Grand. The second class loader loads Parent and Foo. Class 39 // Parent is a sub-class of Grand and class Child is a sub-class of Parent. 40 // Class Child tries to load Parent._field1. This should fail because type Foo 41 // for Parent._field1 is a different type than Child's Foo. 42 // 43 public class LdrCnstrFldMsgTest { 44 public static void main(String... args) throws Exception { 45 ClassLoader l = new pkg.ClassLoaderForChildGrandFoo("pkg.Foo", "pkg.Child", "pkg.Grand"); 46 l.loadClass("pkg.Foo"); 47 48 // Try to call a public method in Grand. 49 Runnable r = (Runnable) l.loadClass("pkg.Child").newInstance(); 50 try { 51 r.run(); 52 throw new RuntimeException("Expected LinkageError exception not thrown"); 53 } catch (java.lang.LinkageError e) { 54 if (!e.getMessage().contains("for the field's defining type, pkg.Parent,") || 55 !e.getMessage().contains("have different Class objects for type pkg.Foo")) { 56 throw new RuntimeException("Wrong LinkageError exception thrown: " + e.toString()); 57 } 58 } 59 } 60 }