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 /*
  25  * @test
  26  * @bug 6194361
  27  * @summary Make sure the VM doesn't crash and throws a SecurityException
  28  *          if defineClass() is called on a byte buffer that parses into a invalid
  29  *          java.lang.Object class.
  30  * @library /test/lib
  31  * @modules java.base/jdk.internal.misc
  32  *          java.compiler
  33  * @run main TestLoadObject
  34  */
  35 
  36 import java.io.*;
  37 import jdk.test.lib.compiler.InMemoryJavaCompiler;
  38 
  39 public class TestLoadObject extends ClassLoader {
  40 
  41    static String source =
  42        " package java.lang;" +
  43        " public class Object" +
  44        " {" +
  45        "   int field;" +
  46        "   public boolean equals(Object o) {" +
  47        "     System.out.println(o.field);" +
  48        "     return false;" +
  49        "   }" +
  50        " }";
  51 
  52   public static void main(String[] args) throws Exception
  53   {
  54     try {
  55       TestLoadObject loader = new TestLoadObject();
  56       byte[] buf = InMemoryJavaCompiler.compile("java.lang.Object", source,
  57                                         "--patch-module=java.base");
  58       System.out.println("test defineClass");
  59       Class c = loader.defineClass(buf, 0, buf.length);
  60       System.out.println("test FAILS");
  61       throw new Exception("Did not get security exception");
  62     } catch(SecurityException e) {
  63       System.out.println("test PASSES");
  64     }
  65   }
  66 }