1 /*
   2  * Copyright (c) 2015, 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  * @summary Verifies the behaviour of Unsafe.defineClass
  27  * @library /testlibrary
  28  * @modules java.base/sun.misc
  29  *          java.compiler
  30  *          java.management
  31  * @run main DefineClass
  32  */
  33 
  34 import java.security.ProtectionDomain;
  35 import java.io.InputStream;
  36 import jdk.test.lib.*;
  37 import sun.misc.Unsafe;
  38 import static jdk.test.lib.Asserts.*;
  39 
  40 public class DefineClass {
  41     public static void main(String args[]) throws Exception {
  42         Unsafe unsafe = Utils.getUnsafe();
  43         TestClassLoader classloader = new TestClassLoader();
  44         ProtectionDomain pd = new ProtectionDomain(null, null);
  45 
  46         byte klassbuf[] = InMemoryJavaCompiler.compile("TestClass", "class TestClass { }");
  47 
  48         // Invalid class data
  49         try {
  50             unsafe.defineClass(null, klassbuf, 4, klassbuf.length - 4, classloader, pd);
  51             throw new RuntimeException("defineClass did not throw expected ClassFormatError");
  52         } catch (ClassFormatError e) {
  53             // Expected
  54         }
  55 
  56         // Negative offset
  57         try {
  58             unsafe.defineClass(null, klassbuf, -1, klassbuf.length, classloader, pd);
  59             throw new RuntimeException("defineClass did not throw expected IndexOutOfBoundsException");
  60         } catch (IndexOutOfBoundsException e) {
  61             // Expected
  62         }
  63 
  64         // Negative length
  65         try {
  66             unsafe.defineClass(null, klassbuf, 0, -1, classloader, pd);
  67             throw new RuntimeException("defineClass did not throw expected IndexOutOfBoundsException");
  68         } catch (IndexOutOfBoundsException e) {
  69             // Expected
  70         }
  71 
  72         // Offset greater than klassbuf.length
  73         try {
  74             unsafe.defineClass(null, klassbuf, klassbuf.length + 1, klassbuf.length, classloader, pd);
  75             throw new RuntimeException("defineClass did not throw expected IndexOutOfBoundsException");
  76         } catch (IndexOutOfBoundsException e) {
  77             // Expected
  78         }
  79 
  80         // Length greater than klassbuf.length
  81         try {
  82             unsafe.defineClass(null, klassbuf, 0, klassbuf.length + 1, classloader, pd);
  83             throw new RuntimeException("defineClass did not throw expected IndexOutOfBoundsException");
  84         } catch (IndexOutOfBoundsException e) {
  85             // Expected
  86         }
  87 
  88         Class klass = unsafe.defineClass(null, klassbuf, 0, klassbuf.length, classloader, pd);
  89         assertEquals(klass.getClassLoader(), classloader);
  90         assertEquals(klass.getProtectionDomain(), pd);
  91     }
  92 
  93     private static class TestClassLoader extends ClassLoader {
  94         public TestClassLoader(ClassLoader parent) {
  95             super(parent);
  96         }
  97 
  98         public TestClassLoader() {
  99             super();
 100         }
 101     }
 102 }