jdk

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/*
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 * Copyright (c) 2018, 2022, 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 6194361
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 * @bug 8202669
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 * @summary Make sure the VM doesn't crash and throws a SecurityException
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 *          if defineClass() is called on a byte buffer that parses into a invalid
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 *          java.lang.Object class.
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 *          Also, make sure the vm doesn't crash on notification for unloading an invalid
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 *          java.lang.Object class.
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 * @library /test/lib
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 * @modules java.base/jdk.internal.misc
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 *          java.compiler
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 * @build jdk.test.whitebox.WhiteBox
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 * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI TestUnloadClassError
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 */
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import jdk.test.lib.compiler.InMemoryJavaCompiler;
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import jdk.test.lib.classloader.ClassUnloadCommon;
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public class TestUnloadClassError extends ClassLoader {
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   static String source =
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       " package java.lang;" +
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       " public class Object" +
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       " {" +
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       "   int field;" +
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       "   public boolean equals(Object o) {" +
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       "     System.out.println(o.field);" +
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       "     return false;" +
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       "   }" +
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       " }";
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  public static void main(String[] args) throws Exception
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  {
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    try {
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      TestUnloadClassError loader = new TestUnloadClassError();
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      byte[] buf = InMemoryJavaCompiler.compile("java.lang.Object", source,
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                                                "--patch-module=java.base");
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      Class c = loader.defineClass(buf, 0, buf.length);
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      System.out.println("test FAILS");
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      throw new RuntimeException("Did not get security exception");
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    } catch(SecurityException e) {
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      System.out.println("test expects SecurityException");
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    }
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    // Unload bad class
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    ClassUnloadCommon.triggerUnloading();
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    System.out.println("test PASSES if it doesn't crash");
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  }
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}
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