119 lines
5.1 KiB
Java
119 lines
5.1 KiB
Java
/*
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* Copyright (c) 2018, 2021, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2018 SAP SE. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 8199852
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* @summary Test exception messages of LinkageError. Two class loaders load
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* two different versions of a class. Should trigger exception in
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* SystemDictionary::check_constraints().
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* @library /test/lib
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* @compile D_ambgs.jasm
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* @run driver jdk.test.lib.helpers.ClassFileInstaller test.D_ambgs
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* @compile ../common/PreemptingClassLoader.java
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* test/D_ambgs.java Test.java test/B.java
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* @run driver jdk.test.lib.helpers.ClassFileInstaller test.B
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* @run main/othervm Test
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*/
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import test.*;
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import java.io.ByteArrayOutputStream;
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import java.io.InputStream;
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import java.io.*;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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public class Test {
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// Force LinkageError.
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//
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// Derived from test runtime/6626217.
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//
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// Uses the specialized class loader PreemptingClassLoader.
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// PreemptingClassLoader only loads files with names passed to it in its
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// constructor. If it does not find it, it delegates to the super class loader.
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//
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// A // interface
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// |
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// B // Compiled to the current working directory so that it is found by our
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// // special class loader. B uses D, so that loading B triggers loading D.
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//
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// C // An abstract class.
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// |
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// D // Class with two different implementations D1 and D2. D2 is
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// // compiled to the current working directory so that it is found by our
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// // special class loader.
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//
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// First, the bootstrap loader will load D1. It already has loaded interface A.
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// Then, the second class loader PreemptingClassLoader will load B. Recursive,
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// it tries to load interface A. As it does not find it (there is no A.impl2),
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// it asks the super classloader for A.
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// Then it loads the D2 variant of D from the current working directory and it's
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// superclass C. This fails as D1 is already loaded with the same superclass.
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// Break the expectedErrorMessage into 2 pieces since the loader name will include
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// its identity hash and can not be compared against.
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static String expectedErrorMessage_part1 = "loader constraint violation: loader PreemptingClassLoader @";
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static String expectedErrorMessage_part2 = " wants to load class test.D_ambgs. A different class " +
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"with the same name was previously loaded by 'app'. " +
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"(test.D_ambgs is in unnamed module of loader 'app')";
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public static void test_access() throws Exception {
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try {
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// Make a Class 'D_ambgs' under the default loader.
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// This uses the implementation from the .java file.
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C c_1 = new D_ambgs();
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// Some classes under a new Loader, loader2, including, indirectly,
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// another version of 'D_ambgs'
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String[] classNames = {"test.B", "test.D_ambgs"};
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ClassLoader loader2 = new PreemptingClassLoader(null, classNames, false);
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Class class2 = loader2.loadClass("test.B");
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A iface = (A)class2.newInstance();
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// Call D1.make() loaded by bootstrap loader with B loaded by Loader2.
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D_ambgs[] x2 = c_1.make(iface);
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throw new RuntimeException("Expected LinkageError was not thrown.");
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} catch (LinkageError jle) {
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String errorMsg = jle.getMessage();
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if (!errorMsg.contains(expectedErrorMessage_part1) ||
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!errorMsg.contains(expectedErrorMessage_part2)) {
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System.out.println("Expected: " + expectedErrorMessage_part1 + "<id>" + expectedErrorMessage_part2 + "\n" +
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"but got: " + errorMsg);
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throw new RuntimeException("Wrong error message of LinkageError.");
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} else {
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System.out.println("Passed with message: " + errorMsg);
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}
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}
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}
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public static void main(String[] args) throws Exception {
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test_access();
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}
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}
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