1 /*
   2  * Copyright (c) 2015, 2016, 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 /test/lib
  28  * @modules java.base/jdk.internal.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.InMemoryJavaCompiler;
  37 import jdk.test.lib.unsafe.UnsafeHelper;
  38 import jdk.internal.misc.Unsafe;
  39 import static jdk.test.lib.Asserts.*;
  40 
  41 public class DefineClass {
  42     public static void main(String args[]) throws Exception {
  43         Unsafe unsafe = UnsafeHelper.getUnsafe();
  44         TestClassLoader classloader = new TestClassLoader();
  45         ProtectionDomain pd = new ProtectionDomain(null, null);
  46 
  47         byte klassbuf[] = InMemoryJavaCompiler.compile("TestClass", "class TestClass { }");
  48 
  49         // Invalid class data
  50         try {
  51             unsafe.defineClass(null, klassbuf, 4, klassbuf.length - 4, classloader, pd);
  52             throw new RuntimeException("defineClass did not throw expected ClassFormatError");
  53         } catch (ClassFormatError e) {
  54             // Expected
  55         }
  56 
  57         // Negative offset
  58         try {
  59             unsafe.defineClass(null, klassbuf, -1, klassbuf.length, classloader, pd);
  60             throw new RuntimeException("defineClass did not throw expected IndexOutOfBoundsException");
  61         } catch (IndexOutOfBoundsException e) {
  62             // Expected
  63         }
  64 
  65         // Negative length
  66         try {
  67             unsafe.defineClass(null, klassbuf, 0, -1, classloader, pd);
  68             throw new RuntimeException("defineClass did not throw expected IndexOutOfBoundsException");
  69         } catch (IndexOutOfBoundsException e) {
  70             // Expected
  71         }
  72 
  73         // Offset greater than klassbuf.length
  74         try {
  75             unsafe.defineClass(null, klassbuf, klassbuf.length + 1, klassbuf.length, classloader, pd);
  76             throw new RuntimeException("defineClass did not throw expected IndexOutOfBoundsException");
  77         } catch (IndexOutOfBoundsException e) {
  78             // Expected
  79         }
  80 
  81         // Length greater than klassbuf.length
  82         try {
  83             unsafe.defineClass(null, klassbuf, 0, klassbuf.length + 1, classloader, pd);
  84             throw new RuntimeException("defineClass did not throw expected IndexOutOfBoundsException");
  85         } catch (IndexOutOfBoundsException e) {
  86             // Expected
  87         }
  88 
  89         Class klass = unsafe.defineClass(null, klassbuf, 0, klassbuf.length, classloader, pd);
  90         assertEquals(klass.getClassLoader(), classloader);
  91         assertEquals(klass.getProtectionDomain(), pd);
  92     }
  93 
  94     private static class TestClassLoader extends ClassLoader {
  95         public TestClassLoader(ClassLoader parent) {
  96             super(parent);
  97         }
  98 
  99         public TestClassLoader() {
 100             super();
 101         }
 102     }
 103 }