1 /* 2 * Copyright (c) 2013, 2020, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.jfr.event.runtime; 27 28 import java.lang.invoke.MethodType; 29 import java.lang.invoke.MethodHandles; 30 import java.lang.invoke.MethodHandles.Lookup; 31 import java.lang.reflect.Array; 32 import static java.lang.invoke.MethodHandles.Lookup.ClassOption.*; 33 34 import jdk.internal.misc.Unsafe; 35 36 public class TestClasses { 37 38 protected TestClassPrivate testClassPrivate; 39 protected TestClassPrivateStatic testClassPrivateStatic; 40 41 public TestClasses() { 42 testClassPrivate = new TestClassPrivate(); 43 testClassPrivateStatic = new TestClassPrivateStatic(); 44 } 45 46 // Classes TestClassPrivate and TestClassPrivateStatic should be loaded at 47 // the same time 48 // as the base class TestClasses 49 private class TestClassPrivate { 50 } 51 52 private static class TestClassPrivateStatic { 53 } 54 55 protected class TestClassProtected { 56 } 57 58 protected static class TestClassProtectedStatic { 59 } 60 61 // When loadClasses() is run, 3 new classes should be loaded. 62 public void loadClasses() throws ClassNotFoundException { 63 final ClassLoader cl = getClass().getClassLoader(); 64 cl.loadClass("jdk.jfr.event.runtime.TestClasses$TestClassProtected1"); 65 cl.loadClass("jdk.jfr.event.runtime.TestClasses$TestClassProtectedStatic1"); 66 } 67 68 protected class TestClassProtected1 { 69 } 70 71 protected static class TestClassProtectedStatic1 { 72 protected TestClassProtectedStaticInner testClassProtectedStaticInner = new TestClassProtectedStaticInner(); 73 74 protected static class TestClassProtectedStaticInner { 75 } 76 } 77 78 public static class TestClassPublicStatic { 79 public static class TestClassPublicStaticInner { 80 } 81 } 82 83 } 84 85 class TestClass { 86 static { 87 // force creation of hidden class (for the lambda form) 88 Runnable r = () -> System.out.println("Hello"); 89 r.run(); 90 } 91 92 public static void createNonFindableClasses(byte[] klassbuf) throws Throwable { 93 // Create a hidden class and an array of hidden classes. 94 Lookup lookup = MethodHandles.lookup(); 95 Class<?> clh = lookup.defineHiddenClass(klassbuf, false, NESTMATE).lookupClass(); 96 Class<?> arrayOfHidden = Array.newInstance(clh, 10).getClass(); // HAS ISSUES? 97 98 // Create an Unsafe anonymous class and an array of unsafe anonymous classes. 99 Unsafe unsafe = Unsafe.getUnsafe(); 100 Class<?> clu = unsafe.defineAnonymousClass(TestClass.class, klassbuf, new Object[0]); 101 final Class<?> arrayOfUAC = Array.newInstance(clu, 15).getClass(); 102 } 103 }