1 /*
   2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 /*
  24  * @test
  25  * @bug 8202669
  26  * @summary Make sure the vm doesn't crash on notification for unloading an invalid
  27  *          java.lang.Object class.
  28  * @library /runtime/testlibrary /test/lib
  29  * @modules java.base/jdk.internal.misc
  30  *          java.compiler
  31  * @run main TestUnloadClassError
  32  */
  33 
  34 import jdk.test.lib.compiler.InMemoryJavaCompiler;
  35 
  36 public class TestUnloadClassError extends ClassLoader {
  37 
  38    static String source =
  39        " package java.lang;" +
  40        " public class Object" +
  41        " {" +
  42        "   int field;" +
  43        "   public boolean equals(Object o) {" +
  44        "     System.out.println(o.field);" +
  45        "     return false;" +
  46        "   }" +
  47        " }";
  48 
  49   public static void main(String[] args) throws Exception
  50   {
  51     try {
  52       TestUnloadClassError loader = new TestUnloadClassError();
  53       byte[] buf = InMemoryJavaCompiler.compile("java.lang.Object", source,
  54                                         "--patch-module=java.base");
  55       Class c = loader.defineClass(buf, 0, buf.length);
  56       System.out.println("test FAILS");
  57       throw new RuntimeException("Did not get security exception");
  58     } catch(SecurityException e) {
  59       System.out.println("test expects SecurityException");
  60     }
  61 
  62     // Unload bad class
  63     ClassUnloadCommon.triggerUnloading();
  64     System.out.println("test PASSES if it doesn't crash");
  65   }
  66 }