1 /*

     2  * Copyright (c) 2018, Red Hat, Inc. 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 package compiler.c2.aarch64;

    25 

    26 import java.lang.reflect.Field;

    27 import jdk.internal.misc.Unsafe;

    28 

    29 class TestUnsafeVolatileWeakCAS

    30 {

    31     public volatile int f_int = 0;

    32     public volatile Integer f_obj = Integer.valueOf(0);

    33     public volatile long f_long = 0;

    34     public volatile byte f_byte = 0;

    35     public volatile short f_short = 0;

    36 

    37     public static Unsafe unsafe = Unsafe.getUnsafe();

    38     public static Field f_int_field;

    39     public static Field f_obj_field;

    40     public static Field f_long_field;

    41     public static Field f_byte_field;

    42     public static Field f_short_field;

    43     public static long f_int_off;

    44     public static long f_obj_off;

    45     public static long f_long_off;

    46     public static long f_byte_off;

    47     public static long f_short_off;

    48 

    49     static {

    50         try {

    51             f_int_field = TestUnsafeVolatileWeakCAS.class.getField("f_int");

    52             f_obj_field = TestUnsafeVolatileWeakCAS.class.getField("f_obj");

    53             f_long_field = TestUnsafeVolatileWeakCAS.class.getField("f_long");

    54             f_byte_field = TestUnsafeVolatileWeakCAS.class.getField("f_byte");

    55             f_short_field = TestUnsafeVolatileWeakCAS.class.getField("f_short");

    56             f_int_off = unsafe.objectFieldOffset(f_int_field);

    57             f_obj_off = unsafe.objectFieldOffset(f_obj_field);

    58             f_long_off = unsafe.objectFieldOffset(f_long_field);

    59             f_byte_off = unsafe.objectFieldOffset(f_byte_field);

    60             f_short_off = unsafe.objectFieldOffset(f_short_field);

    61         } catch (Exception e) {

    62             System.out.println("reflection failed " + e);

    63             e.printStackTrace();

    64         }

    65     }

    66 

    67     public static void main(String[] args)

    68     {

    69         final TestUnsafeVolatileWeakCAS t = new TestUnsafeVolatileWeakCAS();

    70         for (int i = 0; i < 100_000; i++) {

    71             t.f_int = -1;

    72             if (t.testInt(-1, i)) {

    73                 if (t.f_int != i) {

    74                     throw new RuntimeException("bad result!");

    75                 }

    76             }

    77         }

    78         for (int i = 0; i < 100_000; i++) {

    79             t.f_long = -1;

    80             if (t.testLong(-1, i)) {

    81                 if (t.f_long != i) {

    82                     throw new RuntimeException("bad result!");

    83                 }

    84             }

    85         }

    86         for (int i = 0; i < 100_000; i++) {

    87             t.f_byte = -1;

    88             byte i_b = (byte)i;

    89             if (t.testByte((byte)-1, i_b)) {

    90                 if (t.f_byte != i_b) {

    91                     throw new RuntimeException("bad result!");

    92                 }

    93             }

    94         }

    95         for (int i = 0; i < 100_000; i++) {

    96             t.f_short = -1;

    97             short i_s = (short)i;

    98             if (t.testShort((byte)-1, i_s)) {

    99                 if (t.f_short != i_s) {

   100                     throw new RuntimeException("bad result!");

   101                 }

   102             }

   103         }

   104         Integer minusOne = Integer.valueOf(-1);

   105         for (int i = 0; i < 100_000; i++) {

   106             t.f_obj = minusOne;

   107             if (t.testObj(minusOne, Integer.valueOf(i))) {

   108                 if (t.f_obj != i) {

   109                     throw new RuntimeException("bad result!");

   110                 }

   111             }

   112         }

   113     }

   114 

   115     public boolean testInt(int x, int i)

   116     {

   117         return unsafe.weakCompareAndSetInt(this, f_int_off, x, i);

   118     }

   119 

   120     public boolean testObj(Object x, Object o)

   121     {

   122         return unsafe.weakCompareAndSetReference(this, f_obj_off, x, o);

   123     }

   124 

   125     public boolean testLong(long x, long i)

   126     {

   127         return unsafe.weakCompareAndSetLong(this, f_long_off, x, i);

   128     }

   129 

   130     public boolean testByte(byte x, byte i)

   131     {

   132         return unsafe.weakCompareAndSetByte(this, f_byte_off, x, i);

   133     }

   134 

   135     public boolean testShort(short x, short i)

   136     {

   137         return unsafe.weakCompareAndSetShort(this, f_short_off, x, i);

   138     }

   139 }