| /* |
| * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2018 SAP SE. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * @test |
| * @bug 8199852 |
| * @summary Test exception messages of LinkageError. Two class loaders load |
| * two different versions of a class. Should trigger exception in |
| * SystemDictionary::check_constraints(). |
| * @library /test/lib |
| * @compile D_ambgs.jasm |
| * @run driver ClassFileInstaller test.D_ambgs |
| * @compile ../common/PreemptingClassLoader.java |
| * test/D_ambgs.java Test.java test/B.java |
| * @run driver ClassFileInstaller test.B |
| * @run main/othervm Test |
| */ |
| |
| import test.*; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.InputStream; |
| |
| import java.io.*; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| |
| public class Test { |
| |
| // Force LinkageError. |
| // |
| // Derived from test runtime/6626217. |
| // |
| // Uses the specialized class loader PreemptingClassLoader. |
| // PreemptingClassLoader only loads files with names passed to it in its |
| // constructor. If it does not find it, it delegates to the super class loader. |
| // |
| // A // interface |
| // | |
| // B // Compiled to the current working directory so that it is found by our |
| // // special class loader. B uses D, so that loading B triggers loading D. |
| // |
| // C // An abstract class. |
| // | |
| // D // Class with two different implementations D1 and D2. D2 is |
| // // compiled to the current working directory so that it is found by our |
| // // special class loader. |
| // |
| // First, the bootstrap loader will load D1. It already has loaded interface A. |
| // Then, the second class loader PreemptingClassLoader will load B. Recursive, |
| // it tries to load interface A. As it does not find it (there is no A.impl2), |
| // it asks the super classloader for A. |
| // Then it loads the D2 variant of D from the current working directory and it's |
| // superclass C. This fails as D1 is already loaded with the same superclass. |
| |
| // Break the expectedErrorMessage into 2 pieces since the loader name will include |
| // its identity hash and can not be compared against. |
| static String expectedErrorMessage_part1 = "loader constraint violation: loader PreemptingClassLoader @"; |
| static String expectedErrorMessage_part2 = " wants to load class test.D_ambgs. A different class " + |
| "with the same name was previously loaded by 'app'. " + |
| "(test.D_ambgs is in unnamed module of loader 'app')"; |
| public static void test_access() throws Exception { |
| try { |
| // Make a Class 'D_ambgs' under the default loader. |
| // This uses the implementation from the .java file. |
| C c_1 = new D_ambgs(); |
| |
| // Some classes under a new Loader, loader2, including, indirectly, |
| // another version of 'D_ambgs' |
| String[] classNames = {"test.B", "test.D_ambgs"}; |
| |
| ClassLoader loader2 = new PreemptingClassLoader(null, classNames, false); |
| Class class2 = loader2.loadClass("test.B"); |
| A iface = (A)class2.newInstance(); |
| |
| // Call D1.make() loaded by bootstrap loader with B loaded by Loader2. |
| D_ambgs[] x2 = c_1.make(iface); |
| |
| throw new RuntimeException("Expected LinkageError was not thrown."); |
| } catch (LinkageError jle) { |
| String errorMsg = jle.getMessage(); |
| if (!errorMsg.contains(expectedErrorMessage_part1) || |
| !errorMsg.contains(expectedErrorMessage_part2)) { |
| System.out.println("Expected: " + expectedErrorMessage_part1 + "<id>" + expectedErrorMessage_part2 + "\n" + |
| "but got: " + errorMsg); |
| throw new RuntimeException("Wrong error message of LinkageError."); |
| } else { |
| System.out.println("Passed with message: " + errorMsg); |
| } |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| test_access(); |
| } |
| } |