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 * @test 26 * @bug 8199852 27 * @summary Test exception messages of LinkageError with a parent class loader 28 * that is not known to the VM. A class loader loads 29 * twice the same class. Should trigger exception in 30 * SystemDictionary::check_constraints(). 31 * @compile ../common/Foo.java 32 * @compile ../common/J.java 33 * @compile ParentClassLoader.java 34 * PreemptingChildClassLoader.java 35 * @run main/othervm Test 36 */ 37 38 public class Test { 39 40 // Check that all names have external formatting ('.' and not '/' in package names). 41 // Check for parent of class loader. 42 // Break expectedErrorMessage into 2 parts due to the class loader name containing 43 // the unique @<id> identity hash which cannot be compared against. 44 45 // Check that all names have external formatting ('.' and not '/' in package names). 46 // Check for name and parent of class loader. Type should be mentioned as 'class'. 47 static String expectedErrorMessage_part1 = "loader 'DuplicateParentLE_Test_Loader' @"; 48 static String expectedErrorMessage_part2 = " (instance of PreemptingChildClassLoader, child of ParentClassLoader @"; 49 static String expectedErrorMessage_part3 = " ParentClassLoader) attempted duplicate class definition for test.Foo"; 50 51 // Test that the error message is correct when a loader constraint error is 52 // detected during vtable creation. 53 // 54 // In this test, during vtable creation for class Task, method "Task.m()LFoo;" 55 // overrides "J.m()LFoo;". But, Task's class Foo and super type J's class Foo 56 // are different. So, a LinkageError exception should be thrown because the 57 // loader constraint check will fail. 58 public static void test(String loaderName, 59 String testType) throws Exception { 60 String[] classNames = {testType}; 61 ClassLoader l = new PreemptingChildClassLoader(loaderName, classNames, false); 62 l.loadClass(testType); 63 try { 64 l.loadClass(testType).newInstance(); 65 throw new RuntimeException("Expected LinkageError exception not thrown"); 66 } catch (LinkageError e) { 67 String errorMsg = e.getMessage(); 68 if (!errorMsg.contains(expectedErrorMessage_part1) || 69 !errorMsg.contains(expectedErrorMessage_part2) || 70 !errorMsg.contains(expectedErrorMessage_part3)) { 71 System.out.println("Expected: " + expectedErrorMessage_part1 + "<id>" + expectedErrorMessage_part2 + "<id>" + expectedErrorMessage_part3 + "\n" + 72 "but got: " + errorMsg); 73 throw new RuntimeException("Wrong LinkageError exception thrown: " + errorMsg); 74 } 75 System.out.println("Passed with message: " + errorMsg); 76 } 77 } 78 79 public static void main(String args[]) throws Exception { 80 test("DuplicateParentLE_Test_Loader", "test.Foo"); 81 } 82 }