425e1a8bb8
Introduced ClassLoaderData::name() and ClassLoaderData::name_and_id() for use when obtaining a class loader's name. Reviewed-by: coleenp, goetz, mchung, stuefe
99 lines
4.6 KiB
Java
99 lines
4.6 KiB
Java
/*
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* Copyright (c) 2017, 2018, Oracle and/or its affiliates. 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 8186092 8199852
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* @compile ../common/Foo.java
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* ../common/J.java
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* I.java
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* ../common/C.jasm
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* Task.java
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* ../common/PreemptingClassLoader.java
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* @run main/othervm Test
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*/
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public class Test {
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// Break expected error messages into 2 parts since the loader name includes its identity
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// hash which is unique and can't be compared against.
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static String expectedErrorMessage1_part1 =
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"loader constraint violation for class test.Task: " +
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"when selecting overriding method test.Task.m()Ltest/Foo; " +
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"the class loader PreemptingClassLoader @";
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static String expectedErrorMessage1_part2 =
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" (instance of PreemptingClassLoader, " +
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"child of 'app' jdk.internal.loader.ClassLoaders$AppClassLoader) " +
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"of the selected method's type test.Task, " +
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"and the class loader 'app' (instance of jdk.internal.loader.ClassLoaders$AppClassLoader) " +
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"for its super type test.J " +
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"have different Class objects for the type test.Foo used in the signature";
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static String expectedErrorMessage2_part1 =
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"loader constraint violation for class test.Task: " +
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"when selecting overriding method test.Task.m()Ltest/Foo; " +
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"the class loader 'VtableLdrCnstrnt_Test_Loader' @";
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static String expectedErrorMessage2_part2 =
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" (instance of PreemptingClassLoader, " +
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"child of 'app' jdk.internal.loader.ClassLoaders$AppClassLoader) " +
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"of the selected method's type test.Task, " +
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"and the class loader 'app' (instance of jdk.internal.loader.ClassLoaders$AppClassLoader) " +
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"for its super type test.J " +
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"have different Class objects for the type test.Foo used in the signature";
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// Test that the error message is correct when a loader constraint error is
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// detected during vtable creation.
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//
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// In this test, during vtable creation for class Task, method "Task.m()LFoo;"
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// overrides "J.m()LFoo;". But, Task's class Foo and super type J's class Foo
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// are different. So, a LinkageError exception should be thrown because the
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// loader constraint check will fail.
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public static void test(String loaderName,
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String expectedErrorMessage_part1,
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String expectedErrorMessage_part2) throws Exception {
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Class<?> c = test.Foo.class; // Forces standard class loader to load Foo.
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String[] classNames = {"test.Task", "test.Foo", "test.I"};
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ClassLoader l = new PreemptingClassLoader(loaderName, classNames);
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l.loadClass("test.Foo");
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try {
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l.loadClass("test.Task").newInstance();
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throw new RuntimeException("Expected LinkageError exception not thrown");
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} catch (LinkageError e) {
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String errorMsg = e.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 LinkageError exception thrown: " + errorMsg);
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}
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System.out.println("Passed with message: " + errorMsg);
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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(null, expectedErrorMessage1_part1, expectedErrorMessage1_part2);
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test("VtableLdrCnstrnt_Test_Loader", expectedErrorMessage2_part1, expectedErrorMessage2_part2);
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}
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}
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