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 * ../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 static String expectedErrorMessage1 = 39 "loader constraint violation for class test.Task: when selecting overriding method test.Task.m()Ltest/Foo; " + 40 "the class loader instance of PreemptingClassLoader " + 41 "(parent: \"app\" jdk.internal.loader.ClassLoaders$AppClassLoader) of the selected method's type test.Task, " + 42 "and the class loader \"app\" (instance of jdk.internal.loader.ClassLoaders$AppClassLoader, " + 43 "parent: \"platform\" jdk.internal.loader.ClassLoaders$PlatformClassLoader) for its super type test.J " + 44 "have different Class objects for the type test.Foo used in the signature"; 45 46 // Test that the error message is correct when a loader constraint error is 47 // detected during vtable creation. 48 // 49 // In this test, during vtable creation for class Task, method "Task.m()LFoo;" 50 // overrides "J.m()LFoo;". But, Task's class Foo and super type J's class Foo 51 // are different. So, a LinkageError exception should be thrown because the 52 // loader constraint check will fail. 53 public static void test1() throws Exception { 54 Class<?> c = test.Foo.class; // forces standard class loader to load Foo 55 ClassLoader l = new PreemptingClassLoader("test.Task", "test.Foo", "test.I"); 56 l.loadClass("test.Foo"); 57 try { 58 l.loadClass("test.Task").newInstance(); 59 throw new RuntimeException("Expected LinkageError exception not thrown"); 60 } catch (LinkageError e) { 61 String errorMsg = e.getMessage(); 62 if (!errorMsg.equals(expectedErrorMessage1)) { 63 System.out.println("Expected: " + expectedErrorMessage1 + "\n" + 64 "but got: " + errorMsg); 65 throw new RuntimeException("Wrong LinkageError exception thrown: " + errorMsg); 66 } 67 System.out.println("Passed with message: " + errorMsg); 68 } 69 } 70 71 static String expectedErrorMessage2 = 72 "loader constraint violation for class test.Task: when selecting overriding method test.Task.m()Ltest/Foo; " + 73 "the class loader \"VtableLdrCnstrnt_Test_Loader\" (instance of PreemptingClassLoader, " + 74 "parent: \"app\" jdk.internal.loader.ClassLoaders$AppClassLoader) of the selected method's type test.Task, " + 75 "and the class loader \"app\" (instance of jdk.internal.loader.ClassLoaders$AppClassLoader, " + 76 "parent: \"platform\" jdk.internal.loader.ClassLoaders$PlatformClassLoader) for its super type test.J " + 77 "have different Class objects for the type test.Foo used in the signature"; 78 79 // Same as test1, but ClassLoader has a name. 80 public static void test2() throws Exception { 81 Class<?> c = test.Foo.class; // Forces standard class loader to load Foo. 82 String[] classNames = {"test.Task", "test.Foo", "test.I"}; 83 ClassLoader l = new PreemptingClassLoader("VtableLdrCnstrnt_Test_Loader", classNames); 84 l.loadClass("test.Foo"); 85 try { 86 l.loadClass("test.Task").newInstance(); 87 throw new RuntimeException("Expected LinkageError exception not thrown"); 88 } catch (LinkageError e) { 89 String errorMsg = e.getMessage(); 90 if (!errorMsg.equals(expectedErrorMessage2)) { 91 System.out.println("Expected: " + expectedErrorMessage2 + "\n" + 92 "but got: " + errorMsg); 93 throw new RuntimeException("Wrong LinkageError exception thrown: " + errorMsg); 94 } 95 System.out.println("Passed with message: " + errorMsg); 96 } 97 } 98 99 public static void main(String args[]) throws Exception { 100 test1(); 101 test2(); 102 } 103 } 104