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/*
* Copyright (c) 2018, 2021, 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 jdk.test.lib.helpers.ClassFileInstaller test.D_ambgs
* @compile ../common/PreemptingClassLoader.java
* test/D_ambgs.java Test.java test/B.java
* @run driver jdk.test.lib.helpers.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();
}
}
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