1 /*
2 * Copyright (c) 2016, 2018, Red Hat, Inc. All rights reserved.
3 * Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 /*
27 * Run standalone with: --add-exports java.base/jdk.internal.misc=ALL-UNNAMED --add-opens java.base/jdk.internal.misc=ALL-UNNAMED
28 */
29
30 /*
31 * @test id=default
32 * @summary Shenandoah reference CAS test
33 * @requires vm.gc.Shenandoah
34 * @modules java.base/jdk.internal.misc:+open
35 *
36 * @run main/othervm -Diters=20000 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahGCHeuristics=aggressive -XX:+UseShenandoahGC TestReferenceCAS
37 * @run main/othervm -Diters=100 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahGCHeuristics=aggressive -XX:+UseShenandoahGC -Xint TestReferenceCAS
38 * @run main/othervm -Diters=20000 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahGCHeuristics=aggressive -XX:+UseShenandoahGC -XX:-TieredCompilation TestReferenceCAS
39 * @run main/othervm -Diters=20000 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahGCHeuristics=aggressive -XX:+UseShenandoahGC -XX:TieredStopAtLevel=1 TestReferenceCAS
40 * @run main/othervm -Diters=20000 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahGCHeuristics=aggressive -XX:+UseShenandoahGC -XX:TieredStopAtLevel=4 TestReferenceCAS
41 */
42
43 /*
44 * @test id=no-coops
45 * @summary Shenandoah reference CAS test
46 * @requires vm.gc.Shenandoah
47 * @requires vm.bits == "64"
48 * @modules java.base/jdk.internal.misc:+open
49 *
50 * @run main/othervm -Diters=20000 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahGCHeuristics=aggressive -XX:+UseShenandoahGC -XX:-UseCompressedOops TestReferenceCAS
51 * @run main/othervm -Diters=100 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahGCHeuristics=aggressive -XX:+UseShenandoahGC -XX:-UseCompressedOops -Xint TestReferenceCAS
52 * @run main/othervm -Diters=20000 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahGCHeuristics=aggressive -XX:+UseShenandoahGC -XX:-UseCompressedOops -XX:-TieredCompilation TestReferenceCAS
53 * @run main/othervm -Diters=20000 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahGCHeuristics=aggressive -XX:+UseShenandoahGC -XX:-UseCompressedOops -XX:TieredStopAtLevel=1 TestReferenceCAS
54 * @run main/othervm -Diters=20000 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahGCHeuristics=aggressive -XX:+UseShenandoahGC -XX:-UseCompressedOops -XX:TieredStopAtLevel=4 TestReferenceCAS
55 */
56
57 /*
58 * @test id=generational
59 * @summary Shenandoah reference CAS test
60 * @requires vm.gc.Shenandoah
61 * @modules java.base/jdk.internal.misc:+open
62 *
63 * @run main/othervm -Diters=20000 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCMode=generational TestReferenceCAS
64 * @run main/othervm -Diters=100 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCMode=generational -Xint TestReferenceCAS
65 * @run main/othervm -Diters=20000 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCMode=generational -XX:-TieredCompilation TestReferenceCAS
66 * @run main/othervm -Diters=20000 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCMode=generational -XX:TieredStopAtLevel=1 TestReferenceCAS
67 * @run main/othervm -Diters=20000 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCMode=generational -XX:TieredStopAtLevel=4 TestReferenceCAS
68 */
69
70 /*
71 * @test id=generational-no-coops
72 * @summary Shenandoah reference CAS test
73 * @requires vm.gc.Shenandoah
74 * @requires vm.bits == "64"
75 * @modules java.base/jdk.internal.misc:+open
76 *
77 * @run main/othervm -Diters=20000 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCMode=generational -XX:-UseCompressedOops TestReferenceCAS
78 * @run main/othervm -Diters=100 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCMode=generational -XX:-UseCompressedOops -Xint TestReferenceCAS
79 * @run main/othervm -Diters=20000 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCMode=generational -XX:-UseCompressedOops -XX:-TieredCompilation TestReferenceCAS
80 * @run main/othervm -Diters=20000 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCMode=generational -XX:-UseCompressedOops -XX:TieredStopAtLevel=1 TestReferenceCAS
81 * @run main/othervm -Diters=20000 -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCMode=generational -XX:-UseCompressedOops -XX:TieredStopAtLevel=4 TestReferenceCAS
82 */
83 import java.lang.reflect.Field;
84
85 public class TestReferenceCAS {
86
87 static final int ITERS = Integer.getInteger("iters", 1);
88 static final int WEAK_ATTEMPTS = Integer.getInteger("weakAttempts", 10);
89
90 static final jdk.internal.misc.Unsafe UNSAFE;
91 static final long V_OFFSET;
92
93 static {
94 try {
95 Field f = jdk.internal.misc.Unsafe.class.getDeclaredField("theUnsafe");
96 f.setAccessible(true);
97 UNSAFE = (jdk.internal.misc.Unsafe) f.get(null);
98 } catch (Exception e) {
99 throw new RuntimeException("Unable to get Unsafe instance.", e);
100 }
101
102 try {
103 Field vField = TestReferenceCAS.class.getDeclaredField("v");
104 V_OFFSET = UNSAFE.objectFieldOffset(vField);
105 } catch (Exception e) {
106 throw new RuntimeException(e);
107 }
108 }
109
110 Object v;
111
112 private static void assertEquals(boolean a, boolean b, String msg) {
113 if (a != b) {
114 throw new RuntimeException("a (" + a + ") != b (" + b + "): " + msg);
115 }
116 }
117
118 private static void assertEquals(Object a, Object b, String msg) {
119 if (!a.equals(b)) {
120 throw new RuntimeException("a (" + a.toString() + ") != b (" + b.toString() + "): " + msg);
121 }
122 }
123
124 public static void main(String[] args) {
125 TestReferenceCAS t = new TestReferenceCAS();
126 for (int c = 0; c < ITERS; c++) {
127 testAccess(t, V_OFFSET);
128 }
129 }
130
131 static void testAccess(Object base, long offset) {
132 String foo = new String("foo");
133 String bar = new String("bar");
134 String baz = new String("baz");
135 UNSAFE.putReference(base, offset, "foo");
136 {
137 String newval = bar;
138 boolean r = UNSAFE.compareAndSetReference(base, offset, "foo", newval);
139 assertEquals(r, true, "success compareAndSet Object");
140 assertEquals(newval, "bar", "must not destroy newval");
141 Object x = UNSAFE.getReference(base, offset);
142 assertEquals(x, "bar", "success compareAndSet Object value");
143 }
144
145 {
146 String newval = baz;
147 boolean r = UNSAFE.compareAndSetReference(base, offset, "foo", newval);
148 assertEquals(r, false, "failing compareAndSet Object");
149 assertEquals(newval, "baz", "must not destroy newval");
150 Object x = UNSAFE.getReference(base, offset);
151 assertEquals(x, "bar", "failing compareAndSet Object value");
152 }
153
154 UNSAFE.putReference(base, offset, "bar");
155 {
156 String newval = foo;
157 Object r = UNSAFE.compareAndExchangeReference(base, offset, "bar", newval);
158 assertEquals(r, "bar", "success compareAndExchange Object");
159 assertEquals(newval, "foo", "must not destroy newval");
160 Object x = UNSAFE.getReference(base, offset);
161 assertEquals(x, "foo", "success compareAndExchange Object value");
162 }
163
164 {
165 String newval = baz;
166 Object r = UNSAFE.compareAndExchangeReference(base, offset, "bar", newval);
167 assertEquals(r, "foo", "failing compareAndExchange Object");
168 assertEquals(newval, "baz", "must not destroy newval");
169 Object x = UNSAFE.getReference(base, offset);
170 assertEquals(x, "foo", "failing compareAndExchange Object value");
171 }
172
173 UNSAFE.putReference(base, offset, "bar");
174 {
175 String newval = foo;
176 boolean success = false;
177 for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
178 success = UNSAFE.weakCompareAndSetReference(base, offset, "bar", newval);
179 assertEquals(newval, "foo", "must not destroy newval");
180 }
181 assertEquals(success, true, "weakCompareAndSet Object");
182 Object x = UNSAFE.getReference(base, offset);
183 assertEquals(x, "foo", "weakCompareAndSet Object");
184 }
185 }
186
187 }