1 /*
   2  * Copyright (c) 2003, 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  * @bug 4920005 4882798
  27  * @summary make sure redefineClasses throws NullPointerException in the right places.
  28  * @author Robert Field as modified from the code of Gabriel Adauto, Wily Technology
  29  *
  30  * @run build NullRedefineClassesTests
  31  * @run shell MakeJAR.sh redefineAgent
  32  * @run main/othervm -javaagent:redefineAgent.jar NullRedefineClassesTests NullRedefineClassesTests
  33  */
  34 
  35 import java.lang.instrument.ClassDefinition;
  36 import java.lang.instrument.UnmodifiableClassException;
  37 
  38 public class
  39 NullRedefineClassesTests
  40     extends ASimpleInstrumentationTestCase
  41 {
  42 
  43     /**
  44      * Constructor for NullRedefineClassesTests.
  45      * @param name
  46      */
  47     public NullRedefineClassesTests(String name) {
  48         super(name);
  49     }
  50 
  51     public static void
  52     main (String[] args) throws Throwable {
  53         ATestCaseScaffold   test = new NullRedefineClassesTests(args[0]);
  54         test.runTest();
  55     }
  56 
  57     protected final void
  58     doRunTest() throws ClassNotFoundException, UnmodifiableClassException  {
  59         testNullRedefineClasses();
  60     }
  61 
  62 
  63     public void
  64     testNullRedefineClasses() throws ClassNotFoundException, UnmodifiableClassException {
  65         boolean caught;
  66 
  67         // Test that a null argument throws NullPointerException
  68         caught = false;
  69         try {
  70             fInst.redefineClasses(null);
  71         } catch (NullPointerException npe) {
  72             caught = true;
  73         }
  74         assertTrue(caught);
  75 
  76         // Test that a null element throws NullPointerException
  77         caught = false;
  78         try {
  79             fInst.redefineClasses(new ClassDefinition[]{ null });
  80         } catch (NullPointerException npe) {
  81             caught = true;
  82         }
  83         assertTrue(caught);
  84 
  85         // Test that a null element amonst others throws NullPointerException
  86         caught = false;
  87         ClassDefinition cd = new ClassDefinition(DummyClass.class, new byte[] {1, 2, 3});
  88         try {
  89             fInst.redefineClasses(new ClassDefinition[]{ cd, null });
  90         } catch (NullPointerException npe) {
  91             caught = true;
  92         }
  93         assertTrue(caught);
  94 
  95         // Test that a null class throws NullPointerException
  96         caught = false;
  97         try {
  98             new ClassDefinition(null, new byte[] {1, 2, 3});
  99         } catch (NullPointerException npe) {
 100             caught = true;
 101         }
 102         assertTrue(caught);
 103 
 104         // Test that a null byte array throws NullPointerException
 105         caught = false;
 106         try {
 107             new ClassDefinition(DummyClass.class, null);
 108         } catch (NullPointerException npe) {
 109             caught = true;
 110         }
 111         assertTrue(caught);
 112     }
 113 }