1 /* 2 * Copyright (c) 2017, 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 * @test 26 * @bug 8186092 8199852 27 * @compile ../common/Foo.java 28 * ../common/J.java 29 * I.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 // Break expected error messages into 2 parts since the loader name includes its identity 39 // hash which is unique and can't be compared against. 40 static String expectedErrorMessage1_part1 = 41 "loader constraint violation for class test.Task: " + 42 "when selecting overriding method test.Task.m()Ltest/Foo; " + 43 "the class loader PreemptingClassLoader @"; 44 static String expectedErrorMessage1_part2 = 45 " (instance of PreemptingClassLoader, " + 46 "child of 'app' jdk.internal.loader.ClassLoaders$AppClassLoader) " + 47 "of the selected method's type test.Task, " + 48 "and the class loader 'app' (instance of jdk.internal.loader.ClassLoaders$AppClassLoader) " + 49 "for its super type test.J " + 50 "have different Class objects for the type test.Foo used in the signature"; 51 52 static String expectedErrorMessage2_part1 = 53 "loader constraint violation for class test.Task: " + 54 "when selecting overriding method test.Task.m()Ltest/Foo; " + 55 "the class loader 'VtableLdrCnstrnt_Test_Loader' @"; 56 static String expectedErrorMessage2_part2 = 57 " (instance of PreemptingClassLoader, " + 58 "child of 'app' jdk.internal.loader.ClassLoaders$AppClassLoader) " + 59 "of the selected method's type test.Task, " + 60 "and the class loader 'app' (instance of jdk.internal.loader.ClassLoaders$AppClassLoader) " + 61 "for its super type test.J " + 62 "have different Class objects for the type test.Foo used in the signature"; 63 64 // Test that the error message is correct when a loader constraint error is 65 // detected during vtable creation. 66 // 67 // In this test, during vtable creation for class Task, method "Task.m()LFoo;" 68 // overrides "J.m()LFoo;". But, Task's class Foo and super type J's class Foo 69 // are different. So, a LinkageError exception should be thrown because the 70 // loader constraint check will fail. 71 public static void test(String loaderName, 72 String expectedErrorMessage_part1, 73 String expectedErrorMessage_part2) throws Exception { 74 Class<?> c = test.Foo.class; // Forces standard class loader to load Foo. 75 String[] classNames = {"test.Task", "test.Foo", "test.I"}; 76 ClassLoader l = new PreemptingClassLoader(loaderName, classNames); 77 l.loadClass("test.Foo"); 78 try { 79 l.loadClass("test.Task").newInstance(); 80 throw new RuntimeException("Expected LinkageError exception not thrown"); 81 } catch (LinkageError e) { 82 String errorMsg = e.getMessage(); 83 if (!errorMsg.contains(expectedErrorMessage_part1) || 84 !errorMsg.contains(expectedErrorMessage_part2)) { 85 System.out.println("Expected: " + expectedErrorMessage_part1 + "<id>" + expectedErrorMessage_part2 + "\n" + 86 "but got: " + errorMsg); 87 throw new RuntimeException("Wrong LinkageError exception thrown: " + errorMsg); 88 } 89 System.out.println("Passed with message: " + errorMsg); 90 } 91 } 92 93 public static void main(String args[]) throws Exception { 94 test(null, expectedErrorMessage1_part1, expectedErrorMessage1_part2); 95 test("VtableLdrCnstrnt_Test_Loader", expectedErrorMessage2_part1, expectedErrorMessage2_part2); 96 } 97 } 98