100 lines
3.5 KiB
Java
100 lines
3.5 KiB
Java
/*
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* Copyright (c) 2016, 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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import java.awt.Component;
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import java.lang.reflect.Field;
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import static jdk.internal.org.objectweb.asm.Opcodes.*;
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import jdk.internal.org.objectweb.asm.*;
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import jdk.internal.misc.Unsafe;
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/*
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* @test PrimitiveHostClass
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* @bug 8140665
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* @summary Throws IllegalArgumentException if host class is a primitive class.
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* @library /testlibrary
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* @modules java.base/jdk.internal.org.objectweb.asm
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* java.base/jdk.internal.misc
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* @compile -XDignore.symbol.file PrimitiveHostClass.java
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* @run main/othervm PrimitiveHostClass
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*/
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public class PrimitiveHostClass {
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static final Unsafe U;
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static {
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try {
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Field theUnsafe = Unsafe.class.getDeclaredField("theUnsafe");
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theUnsafe.setAccessible(true);
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U = (Unsafe) theUnsafe.get(null);
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} catch (Exception e) {
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throw new AssertionError(e);
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}
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}
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public static void testVMAnonymousClass(Class<?> hostClass) {
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// choose a class name in the same package as the host class
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String prefix = packageName(hostClass);
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if (prefix.length() > 0)
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prefix = prefix.replace('.', '/') + "/";
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String className = prefix + "Anon";
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// create the class
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String superName = "java/lang/Object";
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ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS
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+ ClassWriter.COMPUTE_FRAMES);
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cw.visit(V1_8, ACC_PUBLIC + ACC_FINAL + ACC_SUPER,
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className, null, superName, null);
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byte[] classBytes = cw.toByteArray();
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int cpPoolSize = constantPoolSize(classBytes);
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Class<?> anonClass =
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U.defineAnonymousClass(hostClass, classBytes, new Object[cpPoolSize]);
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}
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private static String packageName(Class<?> c) {
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if (c.isArray()) {
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return packageName(c.getComponentType());
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} else {
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String name = c.getName();
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int dot = name.lastIndexOf('.');
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if (dot == -1) return "";
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return name.substring(0, dot);
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}
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}
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private static int constantPoolSize(byte[] classFile) {
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return ((classFile[8] & 0xFF) << 8) | (classFile[9] & 0xFF);
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}
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public static void main(String args[]) {
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testVMAnonymousClass(PrimitiveHostClass.class);
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try {
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testVMAnonymousClass(int.class);
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throw new RuntimeException(
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"Expected IllegalArgumentException not thrown");
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} catch (IllegalArgumentException e) {
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// Expected
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}
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}
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}
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