1 /*
2 * Copyright (c) 2016, 2020, 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 * @test id=default
28 * @summary Tests for crash/assert when attaching init thread during shutdown
29 * @requires vm.gc.Shenandoah
30 * @library /test/lib
31 * @modules java.base/jdk.internal.misc
32 * java.management
33 * @run driver/timeout=480 TestEvilSyncBug -XX:ShenandoahGCHeuristics=aggressive
34 */
35
36 /*
37 * @test id=generational
38 * @summary Tests for crash/assert when attaching init thread during shutdown
39 * @requires vm.gc.Shenandoah
40 * @library /test/lib
41 * @modules java.base/jdk.internal.misc
42 * java.management
43 * @run driver/timeout=480 TestEvilSyncBug -XX:ShenandoahGCMode=generational
44 */
45
46 import java.util.*;
47 import java.util.concurrent.*;
48 import java.util.concurrent.locks.*;
49
50 import jdk.test.lib.process.ProcessTools;
51 import jdk.test.lib.process.OutputAnalyzer;
52
53 public class TestEvilSyncBug {
54
55 private static final int NUM_RUNS = 100;
56
57 static Thread[] hooks = new MyHook[10000];
58
59 public static void main(String[] args) throws Exception {
60 if ("test".equals(args[0])) {
61 test();
62 } else {
63 String options = args[0];
64 // Use 1/4 of available processors to avoid over-saturation.
65 int numJobs = Math.max(1, Runtime.getRuntime().availableProcessors() / 4);
66 ExecutorService pool = Executors.newFixedThreadPool(numJobs);
67 Future<?>[] fs = new Future<?>[NUM_RUNS];
68
69 for (int c = 0; c < NUM_RUNS; c++) {
70 Callable<Void> task = () -> {
71 OutputAnalyzer output = ProcessTools.executeLimitedTestJava("-Xms128m",
72 "-Xmx128m",
73 "-XX:+UnlockExperimentalVMOptions",
74 "-XX:+UnlockDiagnosticVMOptions",
75 "-XX:+UseShenandoahGC",
76 options,
77 "TestEvilSyncBug", "test");
78 output.shouldHaveExitValue(0);
79 return null;
80 };
81 fs[c] = pool.submit(task);
82 }
83
84 for (Future<?> f : fs) {
85 f.get();
86 }
87
88 pool.shutdown();
89 pool.awaitTermination(1, TimeUnit.HOURS);
90 }
91 }
92
93 private static void test() throws Exception {
94
95 for (int t = 0; t < hooks.length; t++) {
96 hooks[t] = new MyHook();
97 }
98
99 ExecutorService service = Executors.newFixedThreadPool(
100 2,
101 r -> {
102 Thread t = new Thread(r);
103 t.setDaemon(true);
104 return t;
105 }
106 );
107
108 List<Future<?>> futures = new ArrayList<>();
109 for (int c = 0; c < 100; c++) {
110 Runtime.getRuntime().addShutdownHook(hooks[c]);
111 final Test[] tests = new Test[1000];
112 for (int t = 0; t < tests.length; t++) {
113 tests[t] = new Test();
114 }
115
116 Future<?> f1 = service.submit(() -> {
117 Runtime.getRuntime().addShutdownHook(new MyHook());
118 IntResult2 r = new IntResult2();
119 for (Test test : tests) {
120 test.RL_Us(r);
121 }
122 });
123 Future<?> f2 = service.submit(() -> {
124 Runtime.getRuntime().addShutdownHook(new MyHook());
125 for (Test test : tests) {
126 test.WLI_Us();
127 }
128 });
129
130 futures.add(f1);
131 futures.add(f2);
132 }
133
134 for (Future<?> f : futures) {
135 f.get();
136 }
137 }
138
139 public static class IntResult2 {
140 int r1, r2;
141 }
142
143 public static class Test {
144 final StampedLock lock = new StampedLock();
145
146 int x, y;
147
148 public void RL_Us(IntResult2 r) {
149 StampedLock lock = this.lock;
150 long stamp = lock.readLock();
151 r.r1 = x;
152 r.r2 = y;
153 lock.unlock(stamp);
154 }
155
156 public void WLI_Us() {
157 try {
158 StampedLock lock = this.lock;
159 long stamp = lock.writeLockInterruptibly();
160 x = 1;
161 y = 2;
162 lock.unlock(stamp);
163 } catch (InterruptedException e) {
164 throw new RuntimeException(e);
165 }
166 }
167 }
168
169 private static class MyHook extends Thread {
170 @Override
171 public void run() {
172 try {
173 Thread.sleep(10);
174 } catch (Exception e) {}
175 }
176 }
177
178 }