1 /*

     2  * Copyright (c) 2016, 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.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 import java.awt.Component;

    25 import java.lang.reflect.Field;

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

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

    28 import sun.misc.Unsafe;

    29 

    30 /*

    31  * @test PrimitiveHostClass

    32  * @bug 8140665

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

    34  * @library /testlibrary

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

    36  *          java.base/sun.misc

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

    38  * @run main/othervm PrimitiveHostClass

    39  */

    40 

    41 public class PrimitiveHostClass {

    42 

    43     static final Unsafe U;

    44     static {

    45         try {

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

    47             theUnsafe.setAccessible(true);

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

    49         } catch (Exception e) {

    50             throw new AssertionError(e);

    51         }

    52     }

    53 

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

    55 

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

    57         String prefix = packageName(hostClass);

    58         if (prefix.length() > 0)

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

    60         String className = prefix + "Anon";

    61 

    62         // create the class

    63         String superName = "java/lang/Object";

    64         ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS

    65                                          + ClassWriter.COMPUTE_FRAMES);

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

    67                  className, null, superName, null);

    68         byte[] classBytes = cw.toByteArray();

    69         int cpPoolSize = constantPoolSize(classBytes);

    70         Class<?> anonClass =

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

    72     }

    73 

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

    75         if (c.isArray()) {

    76             return packageName(c.getComponentType());

    77         } else {

    78             String name = c.getName();

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

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

    81             return name.substring(0, dot);

    82         }

    83     }

    84 

    85     private static int constantPoolSize(byte[] classFile) {

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

    87     }

    88 

    89     public static void main(String args[]) {

    90         testVMAnonymousClass(PrimitiveHostClass.class);

    91         try {

    92             testVMAnonymousClass(int.class);

    93             throw new RuntimeException(

    94                 "Expected IllegalArgumentException not thrown");

    95         } catch (IllegalArgumentException e) {

    96             // Expected

    97         }

    98     }

    99 }