| /* |
| * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test DefineAnon |
| * @bug 8058575 |
| * @library /testlibrary |
| * @modules java.base/jdk.internal.org.objectweb.asm |
| * java.management |
| * @compile -XDignore.symbol.file=true DefineAnon.java |
| * @run main/othervm p1.DefineAnon |
| */ |
| |
| package p1; |
| |
| import jdk.internal.org.objectweb.asm.ClassWriter; |
| import jdk.internal.org.objectweb.asm.MethodVisitor; |
| import jdk.internal.org.objectweb.asm.Opcodes; |
| import sun.misc.Unsafe; |
| |
| |
| class T { |
| static protected void test0() { System.out.println("test0 (public)"); } |
| static protected void test1() { System.out.println("test1 (protected)"); } |
| static /*package-private*/ void test2() { System.out.println("test2 (package)"); } |
| static private void test3() { System.out.println("test3 (private)"); } |
| } |
| |
| public class DefineAnon { |
| |
| private static Unsafe getUnsafe() { |
| try { |
| java.lang.reflect.Field singleoneInstanceField = Unsafe.class.getDeclaredField("theUnsafe"); |
| singleoneInstanceField.setAccessible(true); |
| return (Unsafe) singleoneInstanceField.get(null); |
| } catch (Throwable ex) { |
| throw new RuntimeException("Was unable to get Unsafe instance."); |
| } |
| } |
| |
| static Unsafe UNSAFE = DefineAnon.getUnsafe(); |
| |
| static Class<?> getAnonClass(Class<?> hostClass, final String className) { |
| final String superName = "java/lang/Object"; |
| ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS + ClassWriter.COMPUTE_FRAMES); |
| cw.visit(Opcodes.V1_8, Opcodes.ACC_PUBLIC + Opcodes.ACC_FINAL + Opcodes.ACC_SUPER, className, null, superName, null); |
| |
| MethodVisitor mv = cw.visitMethod(Opcodes.ACC_STATIC | Opcodes.ACC_PUBLIC, "test", "()V", null, null); |
| mv.visitMethodInsn(Opcodes.INVOKESTATIC, "p1/T", "test0", "()V", false); |
| mv.visitMethodInsn(Opcodes.INVOKESTATIC, "p1/T", "test1", "()V", false); |
| mv.visitMethodInsn(Opcodes.INVOKESTATIC, "p1/T", "test2", "()V", false); |
| mv.visitMethodInsn(Opcodes.INVOKESTATIC, "p1/T", "test3", "()V", false); |
| mv.visitInsn(Opcodes.RETURN); |
| mv.visitMaxs(0, 0); |
| mv.visitEnd(); |
| |
| final byte[] classBytes = cw.toByteArray(); |
| Class<?> invokerClass = UNSAFE.defineAnonymousClass(hostClass, classBytes, new Object[0]); |
| UNSAFE.ensureClassInitialized(invokerClass); |
| return invokerClass; |
| } |
| |
| public static void main(String[] args) throws Throwable { |
| Throwable fail = null; |
| |
| // Anonymous class has the privileges of its host class, so test[0123] should all work. |
| System.out.println("Injecting from the same package (p1):"); |
| Class<?> p1cls = getAnonClass(T.class, "p1/AnonClass"); |
| try { |
| p1cls.getMethod("test").invoke(null); |
| } catch (Throwable ex) { |
| ex.printStackTrace(); |
| fail = ex; // throw this to make test fail, since subtest failed |
| } |
| |
| // Anonymous class has different package name from host class. Should throw |
| // IllegalArgumentException. |
| System.out.println("Injecting from the wrong package (p2):"); |
| try { |
| Class<?> p2cls = getAnonClass(DefineAnon.class, "p2/AnonClass"); |
| p2cls.getMethod("test").invoke(null); |
| System.out.println("Failed, did not get expected IllegalArgumentException"); |
| } catch (java.lang.IllegalArgumentException e) { |
| if (e.getMessage().contains("Host class p1/DefineAnon and anonymous class p2/AnonClass")) { |
| System.out.println("Got expected IllegalArgumentException: " + e.getMessage()); |
| } else { |
| throw new RuntimeException("Unexpected message: " + e.getMessage()); |
| } |
| } catch (Throwable ex) { |
| ex.printStackTrace(); |
| fail = ex; // throw this to make test fail, since subtest failed |
| } |
| |
| // Inject a class in the unnamed package into p1.T. It should be able |
| // to access all methods in p1.T. |
| System.out.println("Injecting unnamed package into correct host class:"); |
| try { |
| Class<?> p3cls = getAnonClass(T.class, "AnonClass"); |
| p3cls.getMethod("test").invoke(null); |
| } catch (Throwable ex) { |
| ex.printStackTrace(); |
| fail = ex; // throw this to make test fail, since subtest failed |
| } |
| |
| // Try using an array class as the host class. This should throw IllegalArgumentException. |
| try { |
| Class<?> p3cls = getAnonClass(String[].class, "AnonClass"); |
| throw new RuntimeException("Expected IllegalArgumentException not thrown"); |
| } catch (IllegalArgumentException ex) { |
| } |
| |
| if (fail != null) throw fail; // make test fail, since subtest failed |
| } |
| } |