1 /* 2 * Copyright (c) 2017, 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 * @test 26 * @bug 8186092 27 * @compile ../common/Foo.java 28 * I.java 29 * ../common/J.java 30 * ../common/C.jasm 31 * Task.java 32 * ../common/PreemptingClassLoader.java 33 * @run main/othervm Test 34 */ 35 36 public class Test { 37 38 // Test that LinkageError exceptions are not thrown during itable creation, 39 // for loader constraint errors, if the target method is an overpass method. 40 // 41 // In this test, during itable creation for class C, method "m()LFoo;" for 42 // C's super interface I has a different class Foo than the selected method's 43 // type J. But, the selected method is an overpass method (that throws an 44 // ICCE). So, no LinkageError exception should be thrown because the loader 45 // constraint check that would cause the LinkageError should not be done. 46 public static void main(String... args) throws Exception { 47 Class<?> c = Foo.class; // forces standard class loader to load Foo 48 ClassLoader l = new PreemptingClassLoader("Task", "Foo", "C", "I"); 49 Runnable r = (Runnable) l.loadClass("Task").newInstance(); 50 try { 51 r.run(); // Cause an ICCE because both I and J define m()LFoo; 52 throw new RuntimeException("Expected ICCE exception not thrown"); 53 } catch (IncompatibleClassChangeError e) { 54 if (!e.getMessage().contains("Conflicting default methods: I.m J.m")) { 55 throw new RuntimeException("Wrong ICCE exception thrown: " + e.getMessage()); 56 } 57 } 58 } 59 }