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 3 parts since the loader name includes its identity 39 // hash which is unique and can't be compared against. 40 static String expectedErrorMessage1_part1 = "loader constraint violation for class test.Task: when " + 41 "selecting overriding method test.Task.m()Ltest/Foo; the " + 42 "class loader PreemptingClassLoader @"; 43 static String expectedErrorMessage1_part2 = " of the selected method's type test.Task, and the class " + 44 "loader 'app' for its super type test.J have different Class objects " + 45 "for the type test.Foo used in the signature (test.Task is in unnamed " + 46 "module of loader PreemptingClassLoader @"; 47 static String expectedErrorMessage1_part3 = ", parent loader 'app'; test.J is in unnamed module of loader 'app')"; 48 49 static String expectedErrorMessage2_part1 = "loader constraint violation for class test.Task: when " + 50 "selecting overriding method test.Task.m()Ltest/Foo; the " + 51 "class loader 'VtableLdrCnstrnt_Test_Loader' @"; 52 static String expectedErrorMessage2_part2 = " of the selected method's type test.Task, and the class " + 53 "loader 'app' for its super type test.J have different Class objects " + 54 "for the type test.Foo used in the signature (test.Task is in unnamed " + 55 "module of loader 'VtableLdrCnstrnt_Test_Loader' @"; 56 static String expectedErrorMessage2_part3 = ", parent loader 'app'; test.J is in unnamed module of loader 'app')"; 57 58 // Test that the error message is correct when a loader constraint error is 59 // detected during vtable creation. 60 // 61 // In this test, during vtable creation for class Task, method "Task.m()LFoo;" 62 // overrides "J.m()LFoo;". But, Task's class Foo and super type J's class Foo 63 // are different. So, a LinkageError exception should be thrown because the 64 // loader constraint check will fail. 65 public static void test(String loaderName, 66 String expectedErrorMessage_part1, 67 String expectedErrorMessage_part2, 68 String expectedErrorMessage_part3) throws Exception { 69 Class<?> c = test.Foo.class; // Forces standard class loader to load Foo. 70 String[] classNames = {"test.Task", "test.Foo", "test.I"}; 71 ClassLoader l = new PreemptingClassLoader(loaderName, classNames); 72 l.loadClass("test.Foo"); 73 try { 74 l.loadClass("test.Task").newInstance(); 75 throw new RuntimeException("Expected LinkageError exception not thrown"); 76 } catch (LinkageError e) { 77 String errorMsg = e.getMessage(); 78 if (!errorMsg.contains(expectedErrorMessage_part1) || 79 !errorMsg.contains(expectedErrorMessage_part2) || 80 !errorMsg.contains(expectedErrorMessage_part3)) { 81 System.out.println("Expected: " + expectedErrorMessage_part1 + "<id>" + expectedErrorMessage_part2 + "\n" + 82 "but got: " + errorMsg); 83 throw new RuntimeException("Wrong LinkageError exception thrown: " + errorMsg); 84 } 85 System.out.println("Passed with message: " + errorMsg); 86 } 87 } 88 89 public static void main(String args[]) throws Exception { 90 test(null, expectedErrorMessage1_part1, 91 expectedErrorMessage1_part2, expectedErrorMessage1_part3); 92 test("VtableLdrCnstrnt_Test_Loader", expectedErrorMessage2_part1, 93 expectedErrorMessage2_part2, expectedErrorMessage2_part3); 94 } 95 }