/*

 * 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

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 */

import java.awt.Component;

import java.lang.reflect.Field;

import static jdk.internal.org.objectweb.asm.Opcodes.*;

import jdk.internal.org.objectweb.asm.*;

import jdk.internal.misc.Unsafe;

/*

 * @test PrimitiveHostClass

 * @bug 8140665

 * @summary Throws IllegalArgumentException if host class is a primitive class.

 * @library /testlibrary

 * @modules java.base/jdk.internal.org.objectweb.asm

 *          java.base/jdk.internal.misc

 * @compile -XDignore.symbol.file PrimitiveHostClass.java

 * @run main/othervm PrimitiveHostClass

 */

public class PrimitiveHostClass {

    static final Unsafe U;

    static {

        try {

            Field theUnsafe = Unsafe.class.getDeclaredField("theUnsafe");

            theUnsafe.setAccessible(true);

            U = (Unsafe) theUnsafe.get(null);

        } catch (Exception e) {

            throw new AssertionError(e);

        }

    }

    public static void testVMAnonymousClass(Class<?> hostClass) {

        // choose a class name in the same package as the host class

        String prefix = packageName(hostClass);

        if (prefix.length() > 0)

            prefix = prefix.replace('.', '/') + "/";

        String className = prefix + "Anon";

        // create the class

        String superName = "java/lang/Object";

        ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS

                                         + ClassWriter.COMPUTE_FRAMES);

        cw.visit(V1_8, ACC_PUBLIC + ACC_FINAL + ACC_SUPER,

                 className, null, superName, null);

        byte[] classBytes = cw.toByteArray();

        int cpPoolSize = constantPoolSize(classBytes);

        Class<?> anonClass =

            U.defineAnonymousClass(hostClass, classBytes, new Object[cpPoolSize]);

    }

    private static String packageName(Class<?> c) {

        if (c.isArray()) {

            return packageName(c.getComponentType());

        } else {

            String name = c.getName();

            int dot = name.lastIndexOf('.');

            if (dot == -1) return "";

            return name.substring(0, dot);

        }

    }

    private static int constantPoolSize(byte[] classFile) {

        return ((classFile[8] & 0xFF) << 8) | (classFile[9] & 0xFF);

    }

    public static void main(String args[]) {

        testVMAnonymousClass(PrimitiveHostClass.class);

        try {

            testVMAnonymousClass(int.class);

            throw new RuntimeException(

                "Expected IllegalArgumentException not thrown");

        } catch (IllegalArgumentException e) {

            // Expected

        }

    }

}