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. A class loader loads 28 * twice the same class. Should trigger exception in 29 * SystemDictionary::check_constraints(). 30 * @compile ../common/Foo.java 31 * @compile ../common/J.java 32 * ../common/PreemptingClassLoader.java 33 * @run main/othervm Test 34 */ 35 36 public class Test { 37 38 // Check that all names have external formatting ('.' and not '/' in package names). 39 // Check for parent of class loader. 40 // Break each expectedErrorMessage into 2 parts due to the class loader name containing 41 // the unique @<id> identity hash which cannot be compared against. 42 static String expectedErrorMessage1_part1 = "loader PreemptingClassLoader @"; 43 static String expectedErrorMessage1_part2 = " attempted duplicate class definition for test.Foo. (test.Foo is in unnamed module of loader PreemptingClassLoader @"; 44 static String expectedErrorMessage1_part3 = ", parent loader 'app')"; 45 46 // Check that all names have external formatting ('.' and not '/' in package names). 47 // Check for name and parent of class loader. 48 static String expectedErrorMessage2_part1 = "loader 'DuplicateLE_Test_Loader' @"; 49 static String expectedErrorMessage2_part2 = " attempted duplicate class definition for test.Foo. (test.Foo is in unnamed module of loader 'DuplicateLE_Test_Loader' @"; 50 static String expectedErrorMessage2_part3 = ", parent loader 'app')"; 51 52 // Check that all names have external formatting ('.' and not '/' in package names). 53 // Check for name and parent of class loader. Type should be mentioned as 'interface'. 54 static String expectedErrorMessage3_part1 = "loader 'DuplicateLE_Test_Loader_IF' @"; 55 static String expectedErrorMessage3_part2 = " attempted duplicate interface definition for test.J. (test.J is in unnamed module of loader 'DuplicateLE_Test_Loader_IF' @"; 56 static String expectedErrorMessage3_part3 = ", parent loader 'app')"; 57 58 59 // Test that the error message is correct when a loader constraint error is 60 // detected during vtable creation. 61 // 62 // In this test, during vtable creation for class Task, method "Task.m()LFoo;" 63 // overrides "J.m()LFoo;". But, Task's class Foo and super type J's class Foo 64 // are different. So, a LinkageError exception should be thrown because the 65 // loader constraint check will fail. 66 public static void test(String loaderName, 67 String expectedErrorMessage_part1, 68 String expectedErrorMessage_part2, 69 String expectedErrorMessage_part3, 70 String testType) throws Exception { 71 String[] classNames = {testType}; 72 ClassLoader l = new PreemptingClassLoader(loaderName, classNames, false); 73 l.loadClass(testType); 74 try { 75 l.loadClass(testType).newInstance(); 76 throw new RuntimeException("Expected LinkageError exception not thrown"); 77 } catch (LinkageError e) { 78 String errorMsg = e.getMessage(); 79 if (!errorMsg.contains(expectedErrorMessage_part1) || 80 !errorMsg.contains(expectedErrorMessage_part2) || 81 !errorMsg.contains(expectedErrorMessage_part3)) { 82 System.out.println("Expected: " + expectedErrorMessage_part1 + "<id>" + expectedErrorMessage_part2 + "\n" + 83 "but got: " + errorMsg); 84 throw new RuntimeException("Wrong LinkageError exception thrown: " + errorMsg); 85 } 86 System.out.println("Passed with message: " + errorMsg); 87 } 88 } 89 90 public static void main(String args[]) throws Exception { 91 test(null, expectedErrorMessage1_part1, expectedErrorMessage1_part2, 92 expectedErrorMessage1_part3, "test.Foo"); 93 test("DuplicateLE_Test_Loader", expectedErrorMessage2_part1, expectedErrorMessage2_part2, 94 expectedErrorMessage2_part3, "test.Foo"); 95 test("DuplicateLE_Test_Loader_IF", expectedErrorMessage3_part1, expectedErrorMessage3_part2, 96 expectedErrorMessage3_part3, "test.J"); 97 } 98 }