126 lines
5.4 KiB
Java
126 lines
5.4 KiB
Java
/*
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* Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test DefineAnon
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* @bug 8058575
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* @library /testlibrary
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* @modules java.base/jdk.internal.org.objectweb.asm
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* java.management
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* java.base/jdk.internal.misc
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* @compile -XDignore.symbol.file=true DefineAnon.java
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* @run main/othervm p1.DefineAnon
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*/
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package p1;
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import jdk.internal.org.objectweb.asm.ClassWriter;
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import jdk.internal.org.objectweb.asm.MethodVisitor;
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import jdk.internal.org.objectweb.asm.Opcodes;
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import jdk.internal.misc.Unsafe;
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class T {
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static protected void test0() { System.out.println("test0 (public)"); }
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static protected void test1() { System.out.println("test1 (protected)"); }
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static /*package-private*/ void test2() { System.out.println("test2 (package)"); }
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static private void test3() { System.out.println("test3 (private)"); }
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}
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public class DefineAnon {
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private static final Unsafe UNSAFE = Unsafe.getUnsafe();
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static Class<?> getAnonClass(Class<?> hostClass, final String className) {
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final String superName = "java/lang/Object";
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ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS + ClassWriter.COMPUTE_FRAMES);
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cw.visit(Opcodes.V1_8, Opcodes.ACC_PUBLIC + Opcodes.ACC_FINAL + Opcodes.ACC_SUPER, className, null, superName, null);
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MethodVisitor mv = cw.visitMethod(Opcodes.ACC_STATIC | Opcodes.ACC_PUBLIC, "test", "()V", null, null);
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mv.visitMethodInsn(Opcodes.INVOKESTATIC, "p1/T", "test0", "()V", false);
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mv.visitMethodInsn(Opcodes.INVOKESTATIC, "p1/T", "test1", "()V", false);
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mv.visitMethodInsn(Opcodes.INVOKESTATIC, "p1/T", "test2", "()V", false);
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mv.visitMethodInsn(Opcodes.INVOKESTATIC, "p1/T", "test3", "()V", false);
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mv.visitInsn(Opcodes.RETURN);
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mv.visitMaxs(0, 0);
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mv.visitEnd();
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final byte[] classBytes = cw.toByteArray();
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Class<?> invokerClass = UNSAFE.defineAnonymousClass(hostClass, classBytes, new Object[0]);
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UNSAFE.ensureClassInitialized(invokerClass);
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return invokerClass;
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}
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public static void main(String[] args) throws Throwable {
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Throwable fail = null;
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// Anonymous class has the privileges of its host class, so test[0123] should all work.
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System.out.println("Injecting from the same package (p1):");
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Class<?> p1cls = getAnonClass(T.class, "p1/AnonClass");
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try {
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p1cls.getMethod("test").invoke(null);
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} catch (Throwable ex) {
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ex.printStackTrace();
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fail = ex; // throw this to make test fail, since subtest failed
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}
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// Anonymous class has different package name from host class. Should throw
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// IllegalArgumentException.
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System.out.println("Injecting from the wrong package (p2):");
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try {
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Class<?> p2cls = getAnonClass(DefineAnon.class, "p2/AnonClass");
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p2cls.getMethod("test").invoke(null);
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System.out.println("Failed, did not get expected IllegalArgumentException");
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} catch (java.lang.IllegalArgumentException e) {
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if (e.getMessage().contains("Host class p1/DefineAnon and anonymous class p2/AnonClass")) {
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System.out.println("Got expected IllegalArgumentException: " + e.getMessage());
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} else {
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throw new RuntimeException("Unexpected message: " + e.getMessage());
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}
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} catch (Throwable ex) {
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ex.printStackTrace();
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fail = ex; // throw this to make test fail, since subtest failed
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}
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// Inject a class in the unnamed package into p1.T. It should be able
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// to access all methods in p1.T.
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System.out.println("Injecting unnamed package into correct host class:");
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try {
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Class<?> p3cls = getAnonClass(T.class, "AnonClass");
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p3cls.getMethod("test").invoke(null);
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} catch (Throwable ex) {
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ex.printStackTrace();
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fail = ex; // throw this to make test fail, since subtest failed
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}
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// Try using an array class as the host class. This should throw IllegalArgumentException.
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try {
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Class<?> p3cls = getAnonClass(String[].class, "AnonClass");
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throw new RuntimeException("Expected IllegalArgumentException not thrown");
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} catch (IllegalArgumentException ex) {
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}
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if (fail != null) throw fail; // make test fail, since subtest failed
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}
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}
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