1 /*

     2  * Copyright (c) 2018, 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 8046171

    27  * @summary Test JNI access to private fields between nestmates and nest-host

    28  *          using different flavours of named nested types

    29  * @compile ../NestmatesJNI.java

    30  * @run main/othervm/native TestJNI

    31  * @run main/othervm/native -Xcheck:jni TestJNI

    32  */

    33 public class TestJNI {

    34 

    35     // Private field of nest-host for nestmates to access

    36     private int priv_field;

    37 

    38     static final String FIELD = "priv_field";

    39 

    40     // public constructor so we aren't relying on private access

    41     public TestJNI() {}

    42 

    43     // Methods that will access private fields of nestmates

    44 

    45     // NOTE: No StaticIface variants as interfaces can't have instance fields

    46 

    47     void access_priv(TestJNI o) {

    48         this.priv_field = getAndInc(o, o.getClass(), FIELD);

    49     }

    50     void access_priv(InnerNested o) {

    51         this.priv_field = getAndInc(o, o.getClass(), FIELD);

    52     }

    53     void access_priv(StaticNested o) {

    54         this.priv_field = getAndInc(o, o.getClass(), FIELD);

    55     }

    56 

    57     // The various nestmates

    58 

    59     static interface StaticIface {

    60 

    61         // Methods that will access private fields of nestmates

    62 

    63         default void access_priv(TestJNI o) {

    64             int priv_field = getAndInc(o, o.getClass(), FIELD);

    65         }

    66         default void access_priv(InnerNested o) {

    67             int priv_field = getAndInc(o, o.getClass(), FIELD);

    68         }

    69         default void access_priv(StaticNested o) {

    70             int priv_field = getAndInc(o, o.getClass(), FIELD);

    71         }

    72     }

    73 

    74     static class StaticNested {

    75 

    76         private int priv_field;

    77 

    78         // public constructor so we aren't relying on private access

    79         public StaticNested() {}

    80 

    81         // Methods that will access private fields of nestmates

    82 

    83         void access_priv(TestJNI o) {

    84             this.priv_field = getAndInc(o, o.getClass(), FIELD);

    85         }

    86         void access_priv(InnerNested o) {

    87             this.priv_field = getAndInc(o, o.getClass(), FIELD);

    88         }

    89         void access_priv(StaticNested o) {

    90             this.priv_field = getAndInc(o, o.getClass(), FIELD);

    91         }

    92     }

    93 

    94     class InnerNested {

    95 

    96         private int priv_field;

    97 

    98         // public constructor so we aren't relying on private access

    99         public InnerNested() {}

   100 

   101         void access_priv(TestJNI o) {

   102             this.priv_field = getAndInc(o, o.getClass(), FIELD);

   103         }

   104         void access_priv(InnerNested o) {

   105             this.priv_field = getAndInc(o, o.getClass(), FIELD);

   106         }

   107         void access_priv(StaticNested o) {

   108             this.priv_field = getAndInc(o, o.getClass(), FIELD);

   109         }

   110     }

   111 

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

   113         TestJNI o = new TestJNI();

   114         StaticNested s = new StaticNested();

   115         InnerNested i = o.new InnerNested();

   116         StaticIface intf = new StaticIface() {};

   117 

   118         o.access_priv(new TestJNI());

   119         o.access_priv(i);

   120         o.access_priv(s);

   121 

   122         s.access_priv(o);

   123         s.access_priv(i);

   124         s.access_priv(new StaticNested());

   125 

   126         i.access_priv(o);

   127         i.access_priv(o.new InnerNested());

   128         i.access_priv(s);

   129 

   130         intf.access_priv(o);

   131         intf.access_priv(i);

   132         intf.access_priv(s);

   133     }

   134 

   135     static int getAndInc(Object target, Class<?> klass, String field) {

   136         String definingClass = klass.getName();

   137         String desc = "Access to field " +

   138                        definingClass + "." + field + " on instance of class " +

   139                        target.getClass().getName();

   140         int first, second;

   141         try {

   142             first = NestmatesJNI.getIntField(target, definingClass, field);

   143             NestmatesJNI.setIntField(target, definingClass, field, (first + 1));

   144             second = NestmatesJNI.getIntField(target, definingClass, field);

   145         }

   146         catch (Throwable t) {

   147             throw new Error(desc + ": Unexpected exception: " + t, t);

   148         }

   149         if (second != first + 1) {

   150             throw new Error(desc + ": wrong field values: first=" + first +

   151                             ", second=" + second + " (should equal first+1)");

   152         }

   153         System.out.println(desc + " - passed");

   154         return first;

   155     }

   156 }