1 /*
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   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  * @modules java.instrument
  31  * @run build NullRedefineClassesTests
  32  * @run shell MakeJAR.sh redefineAgent
  33  * @run main/othervm -javaagent:redefineAgent.jar NullRedefineClassesTests NullRedefineClassesTests
  34  */
  35 
  36 import java.lang.instrument.ClassDefinition;
  37 import java.lang.instrument.UnmodifiableClassException;
  38 
  39 public class
  40 NullRedefineClassesTests
  41     extends ASimpleInstrumentationTestCase
  42 {
  43 
  44     /**
  45      * Constructor for NullRedefineClassesTests.
  46      * @param name
  47      */
  48     public NullRedefineClassesTests(String name) {
  49         super(name);
  50     }
  51 
  52     public static void
  53     main (String[] args) throws Throwable {
  54         ATestCaseScaffold   test = new NullRedefineClassesTests(args[0]);
  55         test.runTest();
  56     }
  57 
  58     protected final void
  59     doRunTest() throws ClassNotFoundException, UnmodifiableClassException  {
  60         testNullRedefineClasses();
  61     }
  62 
  63 
  64     public void
  65     testNullRedefineClasses() throws ClassNotFoundException, UnmodifiableClassException {
  66         boolean caught;
  67 
  68         // Test that a null argument throws NullPointerException
  69         caught = false;
  70         try {
  71             fInst.redefineClasses(null);
  72         } catch (NullPointerException npe) {
  73             caught = true;
  74         }
  75         assertTrue(caught);
  76 
  77         // Test that a null element throws NullPointerException
  78         caught = false;
  79         try {
  80             fInst.redefineClasses(new ClassDefinition[]{ null });
  81         } catch (NullPointerException npe) {
  82             caught = true;
  83         }
  84         assertTrue(caught);
  85 
  86         // Test that a null element amonst others throws NullPointerException
  87         caught = false;
  88         ClassDefinition cd = new ClassDefinition(DummyClass.class, new byte[] {1, 2, 3});
  89         try {
  90             fInst.redefineClasses(new ClassDefinition[]{ cd, null });
  91         } catch (NullPointerException npe) {
  92             caught = true;
  93         }
  94         assertTrue(caught);
  95 
  96         // Test that a null class throws NullPointerException
  97         caught = false;
  98         try {
  99             new ClassDefinition(null, new byte[] {1, 2, 3});
 100         } catch (NullPointerException npe) {
 101             caught = true;
 102         }
 103         assertTrue(caught);
 104 
 105         // Test that a null byte array throws NullPointerException
 106         caught = false;
 107         try {
 108             new ClassDefinition(DummyClass.class, null);
 109         } catch (NullPointerException npe) {
 110             caught = true;
 111         }
 112         assertTrue(caught);
 113     }
 114 }