1 /*

     2  * Copyright (c) 2019, 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 /*

    25  * @test

    26  * @bug 8226709

    27  * @summary MethodTypeDesc::resolveConstantDesc needs access check per the specification

    28  * @compile ../pkg2/PublicClass.java ../pkg2/NonPublicClass.java

    29  * @run main pkg1.MethodTypeDescriptorAccessTest

    30  */

    31 

    32 package pkg1;

    33 

    34 import java.lang.invoke.*;

    35 import java.lang.invoke.MethodType;

    36 import java.lang.constant.*;

    37 

    38 import static java.lang.invoke.MethodHandles.*;

    39 import static java.lang.invoke.MethodHandles.Lookup.*;

    40 import static java.lang.invoke.MethodType.*;

    41 

    42 public class MethodTypeDescriptorAccessTest {

    43     public static void main(String... args) throws Throwable {

    44         new MethodTypeDescriptorAccessTest().test();

    45     }

    46 

    47     void test() {

    48         Lookup selfLookup = MethodHandles.lookup();

    49         //first test PublicClass

    50         String descriptorpub = "(Lpkg2/PublicClass;)Lpkg2/PublicClass;";

    51         MethodTypeDesc mtdpub = MethodTypeDesc.ofDescriptor(descriptorpub);

    52         checkValidAccess(mtdpub, selfLookup);

    53 

    54         // test NonPublicClass in the return type

    55         String descriptornp = "()Lpkg2/NonPublicClass;";

    56         MethodTypeDesc mtdnp = MethodTypeDesc.ofDescriptor(descriptornp);

    57         checkInvalidAccess(mtdnp, selfLookup);

    58 

    59         // test NonPublicClass in the parameters

    60         descriptornp = "(Lpkg2/NonPublicClass;)I";

    61         mtdnp = MethodTypeDesc.ofDescriptor(descriptornp);

    62         checkInvalidAccess(mtdnp, selfLookup);

    63 

    64         MethodType mt = MethodType.fromMethodDescriptorString("(Lpkg2/NonPublicClass;)I", selfLookup.lookupClass().getClassLoader());

    65     }

    66 

    67     private void checkValidAccess(MethodTypeDesc mtd, Lookup lookup) {

    68         try {

    69             MethodType mt = (MethodType)mtd.resolveConstantDesc(lookup);

    70         } catch (ReflectiveOperationException unexpected) {

    71             throw new Error("resolveConstantDesc() threw ReflectiveOperationException unexpectedly with cause " +

    72                     unexpected.getCause() + " for " + mtd);

    73         }

    74     }

    75 

    76     private void checkInvalidAccess(MethodTypeDesc mtd, Lookup lookup) {

    77         try {

    78             MethodType mt = (MethodType)mtd.resolveConstantDesc(lookup);

    79             throw new Error("resolveConstantDesc() succeeded unexpectedly " + mtd);

    80         } catch (ReflectiveOperationException expected) {

    81             if (expected.getClass() != IllegalAccessException.class) {

    82                 throw new Error("resolveConstantDesc() threw unexpected ReflectiveOperationException with cause " +

    83                         expected.getCause() + " for " + mtd);

    84             }

    85         }

    86     }

    87 

    88 }