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 
main(String[] args)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 
testInt(int x, int i)115     public boolean testInt(int x, int i)
116     {
117         return unsafe.weakCompareAndSetInt(this, f_int_off, x, i);
118     }
119 
testObj(Object x, Object o)120     public boolean testObj(Object x, Object o)
121     {
122         return unsafe.weakCompareAndSetReference(this, f_obj_off, x, o);
123     }
124 
testLong(long x, long i)125     public boolean testLong(long x, long i)
126     {
127         return unsafe.weakCompareAndSetLong(this, f_long_off, x, i);
128     }
129 
testByte(byte x, byte i)130     public boolean testByte(byte x, byte i)
131     {
132         return unsafe.weakCompareAndSetByte(this, f_byte_off, x, i);
133     }
134 
testShort(short x, short i)135     public boolean testShort(short x, short i)
136     {
137         return unsafe.weakCompareAndSetShort(this, f_short_off, x, i);
138     }
139 }
140