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 * @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 }