1/* 2 * Copyright (c) 2017, 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 * @build TrySetAccessibleTest 27 * @modules java.base/java.lang:open 28 * java.base/jdk.internal.perf 29 * java.base/jdk.internal.misc:+open 30 * @run testng/othervm --illegal-access=deny TrySetAccessibleTest 31 * @summary Test AccessibleObject::trySetAccessible method 32 */ 33 34import java.lang.reflect.AccessibleObject; 35import java.lang.reflect.Constructor; 36import java.lang.reflect.Field; 37import java.lang.reflect.InvocationTargetException; 38import java.lang.reflect.Method; 39 40import jdk.internal.misc.Unsafe; 41import jdk.internal.perf.Perf; 42 43import org.testng.annotations.Test; 44import static org.testng.Assert.*; 45 46@Test 47public class TrySetAccessibleTest { 48 /** 49 * Invoke a private constructor on a public class in an exported package 50 */ 51 public void testPrivateConstructorInExportedPackage() throws Exception { 52 Constructor<?> ctor = Perf.class.getDeclaredConstructor(); 53 54 try { 55 ctor.newInstance(); 56 assertTrue(false); 57 } catch (IllegalAccessException expected) { } 58 59 assertFalse(ctor.trySetAccessible()); 60 assertFalse(ctor.canAccess(null)); 61 } 62 63 /** 64 * Invoke a private constructor on a public class in an open package 65 */ 66 public void testPrivateConstructorInOpenedPackage() throws Exception { 67 Constructor<?> ctor = Unsafe.class.getDeclaredConstructor(); 68 69 try { 70 ctor.newInstance(); 71 assertTrue(false); 72 } catch (IllegalAccessException expected) { } 73 74 assertTrue(ctor.trySetAccessible()); 75 assertTrue(ctor.canAccess(null)); 76 Unsafe unsafe = (Unsafe) ctor.newInstance(); 77 } 78 79 /** 80 * Invoke a private method on a public class in an exported package 81 */ 82 public void testPrivateMethodInExportedPackage() throws Exception { 83 Method m = Perf.class.getDeclaredMethod("getBytes", String.class); 84 try { 85 m.invoke(null); 86 assertTrue(false); 87 } catch (IllegalAccessException expected) { } 88 89 assertFalse(m.trySetAccessible()); 90 assertFalse(m.canAccess(null)); 91 } 92 93 94 /** 95 * Invoke a private method on a public class in an open package 96 */ 97 public void testPrivateMethodInOpenedPackage() throws Exception { 98 Method m = Unsafe.class.getDeclaredMethod("throwIllegalAccessError"); 99 assertFalse(m.canAccess(null)); 100 101 try { 102 m.invoke(null); 103 assertTrue(false); 104 } catch (IllegalAccessException expected) { } 105 106 assertTrue(m.trySetAccessible()); 107 assertTrue(m.canAccess(null)); 108 try { 109 m.invoke(null); 110 assertTrue(false); 111 } catch (InvocationTargetException e) { 112 // thrown by throwIllegalAccessError 113 assertTrue(e.getCause() instanceof IllegalAccessError); 114 } 115 } 116 117 /** 118 * Invoke a private method on a public class in an exported package 119 */ 120 public void testPrivateFieldInExportedPackage() throws Exception { 121 Field f = Perf.class.getDeclaredField("instance"); 122 try { 123 f.get(null); 124 assertTrue(false); 125 } catch (IllegalAccessException expected) { } 126 127 assertFalse(f.trySetAccessible()); 128 assertFalse(f.canAccess(null)); 129 try { 130 f.get(null); 131 assertTrue(false); 132 } catch (IllegalAccessException expected) {} 133 } 134 135 /** 136 * Access a private field in a public class that is an exported package 137 */ 138 public void testPrivateFieldInOpenedPackage() throws Exception { 139 Field f = Unsafe.class.getDeclaredField("theUnsafe"); 140 141 try { 142 f.get(null); 143 assertTrue(false); 144 } catch (IllegalAccessException expected) { } 145 146 assertTrue(f.trySetAccessible()); 147 assertTrue(f.canAccess(null)); 148 Unsafe unsafe = (Unsafe) f.get(null); 149 } 150 151 152 /** 153 * Invoke a public constructor on a public class in a non-exported package 154 */ 155 public void testPublicConstructorInNonExportedPackage() throws Exception { 156 Class<?> clazz = Class.forName("sun.security.x509.X500Name"); 157 Constructor<?> ctor = clazz.getConstructor(String.class); 158 159 try { 160 ctor.newInstance("cn=duke"); 161 assertTrue(false); 162 } catch (IllegalAccessException expected) { } 163 164 assertFalse(ctor.trySetAccessible()); 165 assertFalse(ctor.canAccess(null)); 166 assertTrue(ctor.trySetAccessible() == ctor.isAccessible()); 167 } 168 169 170 /** 171 * Access a public field in a public class that in a non-exported package 172 */ 173 public void testPublicFieldInNonExportedPackage() throws Exception { 174 Class<?> clazz = Class.forName("sun.security.x509.X500Name"); 175 Field f = clazz.getField("SERIALNUMBER_OID"); 176 177 try { 178 f.get(null); 179 assertTrue(false); 180 } catch (IllegalAccessException expected) { } 181 182 assertFalse(f.trySetAccessible()); 183 assertFalse(f.canAccess(null)); 184 } 185 186 187 /** 188 * Test that the Class constructor cannot be make accessible. 189 */ 190 public void testJavaLangClass() throws Exception { 191 192 // non-public constructor 193 Constructor<?> ctor 194 = Class.class.getDeclaredConstructor(ClassLoader.class, Class.class); 195 AccessibleObject[] ctors = { ctor }; 196 197 assertFalse(ctor.trySetAccessible()); 198 assertFalse(ctor.canAccess(null)); 199 } 200 201} 202