75 lines
3.3 KiB
Java
75 lines
3.3 KiB
Java
/*
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* Copyright (c) 2018, 2019, 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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/*
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* @test
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* @compile pkg/Grand.java pkg/Parent.java pkg/ClassLoaderForParentFoo.java
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* @compile pkg/ClassLoaderForChildGrandFoo.java pkg/Child.jasm
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* @run main/othervm LdrCnstrFldMsgTest
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*/
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import java.lang.reflect.Method;
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// Check that the LinkageError loader constraint message for fields contains the
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// correct information.
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//
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// The test creates two class loaders. The first class loader loads classes
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// Child, Foo, and Grand. The second class loader loads Parent and Foo. Class
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// Parent is a sub-class of Grand and class Child is a sub-class of Parent.
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// Class Child tries to load Parent._field1. This should fail because type Foo
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// for Parent._field1 is a different type than Child's Foo.
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//
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// Grand (ldr1) has field _field1 of type Foo(ldr1)
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// |
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// Parent (ldr2) has field _field1 of type Foo(ldr2)
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// |
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// Child (ldr1)
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//
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// java.lang.LinkageError: loader constraint violation:
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// when resolving field "_field1" of type pkg.Foo,
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// the class loader pkg.ClassLoaderForChildGrandFoo @42b2e259 of the current class, pkg.Child,
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// and the class loader pkg.ClassLoaderForParentFoo @4b55c90f for the field's defining class, pkg.Parent,
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// have different Class objects for type pkg.Foo
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// (pkg.Child is in unnamed module of loader pkg.ClassLoaderForChildGrandFoo @42b2e259, parent loader 'app';
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// pkg.Parent is in unnamed module of loader pkg.ClassLoaderForParentFoo @4b55c90f, parent loader 'app')
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//
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public class LdrCnstrFldMsgTest {
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public static void main(String... args) throws Exception {
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ClassLoader l = new pkg.ClassLoaderForChildGrandFoo("pkg.Foo", "pkg.Child", "pkg.Grand");
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l.loadClass("pkg.Foo");
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// Try to call a public method in Grand.
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Runnable r = (Runnable) l.loadClass("pkg.Child").newInstance();
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try {
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r.run();
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throw new RuntimeException("Expected LinkageError exception not thrown");
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} catch (java.lang.LinkageError e) {
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if (!e.getMessage().contains("for the field's defining class, pkg.Parent,") ||
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!e.getMessage().contains("have different Class objects for type pkg.Foo")) {
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throw new RuntimeException("Wrong LinkageError exception thrown: " + e.toString());
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}
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}
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}
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}
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