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
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22 */
23
24/* @test
25 * @bug 8171377
26 * @summary Basic test for Unsafe::invokeCleaner
27 * @modules jdk.unsupported
28 * @run testng/othervm InvokeCleaner
29 */
30
31import java.io.Closeable;
32import java.lang.reflect.Field;
33import java.nio.ByteBuffer;
34import java.nio.MappedByteBuffer;
35import java.nio.channels.FileChannel;
36import java.nio.file.Files;
37import java.nio.file.Path;
38import java.nio.file.Paths;
39import java.util.ArrayList;
40import java.util.List;
41import sun.misc.Unsafe;
42import org.testng.annotations.AfterClass;
43import org.testng.annotations.BeforeClass;
44import org.testng.annotations.Test;
45import org.testng.annotations.DataProvider;
46
47public class InvokeCleaner {
48
49    static Unsafe UNSAFE;
50    static Path bob = Paths.get("bob");
51    static List<Closeable> closeables = new ArrayList<>();
52
53    @BeforeClass
54    static void init() throws Exception {
55        UNSAFE = getUnsafe();
56
57        byte[] srcData = new byte[20];
58        for (int i=0; i<20; i++)
59            srcData[i] = (byte)i;
60        Files.write(bob, srcData);
61    }
62
63    @DataProvider(name = "badBuffers")
64    static Object[][] createBadBuffers() throws Exception {
65        FileChannel fc = FileChannel.open(bob);
66        closeables.add(fc);
67        MappedByteBuffer mbb = fc.map(FileChannel.MapMode.READ_ONLY, 0, 10);
68
69        return new Object[][] {
70                { ByteBuffer.allocate(0) },
71                { ByteBuffer.allocate(10) },
72                { ByteBuffer.allocate(10).duplicate() },
73                { ByteBuffer.allocate(10).slice() },
74                { ByteBuffer.allocateDirect(10).duplicate() },
75                { ByteBuffer.allocateDirect(10).slice() },
76                { ByteBuffer.allocateDirect(0).duplicate() },
77                { ByteBuffer.allocateDirect(0).slice() },
78                { mbb.duplicate() },
79                { mbb.slice() }
80        };
81    }
82
83    @Test(dataProvider="badBuffers",
84          expectedExceptions = IllegalArgumentException.class)
85    public void badBuffers(ByteBuffer buffer) throws Exception {
86        UNSAFE.invokeCleaner(buffer);
87    }
88
89    @DataProvider(name = "goodBuffers")
90    static Object[][] createGoodBuffers() throws Exception {
91        FileChannel fc = FileChannel.open(bob);
92        closeables.add(fc);
93        MappedByteBuffer mbb = fc.map(FileChannel.MapMode.READ_ONLY, 0, 10);
94        mbb.load();
95
96        return new Object[][] {
97                { ByteBuffer.allocateDirect(0) },
98                { ByteBuffer.allocateDirect(10) },
99                { mbb },
100                { fc.map(FileChannel.MapMode.READ_ONLY, 1, 11) }
101        };
102    }
103
104    @Test(dataProvider="goodBuffers")
105    public void goodBuffers(ByteBuffer buffer) throws Exception {
106        UNSAFE.invokeCleaner(buffer);
107    }
108
109    @Test(expectedExceptions = NullPointerException.class)
110    public void npe() throws Exception {
111        UNSAFE.invokeCleaner(null);
112    }
113
114    static Unsafe getUnsafe() throws ReflectiveOperationException {
115        Field f = Unsafe.class.getDeclaredField("theUnsafe");
116        f.setAccessible(true);
117        return (Unsafe)f.get(null);
118    }
119
120    @AfterClass
121    public void cleanup() throws Exception {
122        for(Closeable fc : closeables)
123            fc.close();
124    }
125}
126