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 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-Xms128m",
72 "-Xmx128m",
73 "-XX:+UnlockExperimentalVMOptions",
74 "-XX:+UnlockDiagnosticVMOptions",
75 "-XX:+UseShenandoahGC",
76 options,
77 "TestEvilSyncBug", "test");
78 OutputAnalyzer output = new OutputAnalyzer(pb.start());
79 output.shouldHaveExitValue(0);
80 return null;
81 };
82 fs[c] = pool.submit(task);
83 }
84
85 for (Future<?> f : fs) {
86 f.get();
87 }
88
89 pool.shutdown();
90 pool.awaitTermination(1, TimeUnit.HOURS);
91 }
92 }
93
94 private static void test() throws Exception {
95
96 for (int t = 0; t < hooks.length; t++) {
97 hooks[t] = new MyHook();
98 }
99
100 ExecutorService service = Executors.newFixedThreadPool(
101 2,
102 r -> {
103 Thread t = new Thread(r);
104 t.setDaemon(true);
105 return t;
106 }
107 );
108
109 List<Future<?>> futures = new ArrayList<>();
110 for (int c = 0; c < 100; c++) {
111 Runtime.getRuntime().addShutdownHook(hooks[c]);
112 final Test[] tests = new Test[1000];
113 for (int t = 0; t < tests.length; t++) {
114 tests[t] = new Test();
115 }
116
117 Future<?> f1 = service.submit(() -> {
118 Runtime.getRuntime().addShutdownHook(new MyHook());
119 IntResult2 r = new IntResult2();
120 for (Test test : tests) {
121 test.RL_Us(r);
122 }
123 });
124 Future<?> f2 = service.submit(() -> {
125 Runtime.getRuntime().addShutdownHook(new MyHook());
126 for (Test test : tests) {
127 test.WLI_Us();
128 }
129 });
130
131 futures.add(f1);
132 futures.add(f2);
133 }
134
135 for (Future<?> f : futures) {
136 f.get();
137 }
138 }
139
140 public static class IntResult2 {
141 int r1, r2;
142 }
143
144 public static class Test {
145 final StampedLock lock = new StampedLock();
146
147 int x, y;
148
149 public void RL_Us(IntResult2 r) {
150 StampedLock lock = this.lock;
151 long stamp = lock.readLock();
152 r.r1 = x;
153 r.r2 = y;
154 lock.unlock(stamp);
155 }
156
157 public void WLI_Us() {
158 try {
159 StampedLock lock = this.lock;
160 long stamp = lock.writeLockInterruptibly();
161 x = 1;
162 y = 2;
163 lock.unlock(stamp);
164 } catch (InterruptedException e) {
165 throw new RuntimeException(e);
166 }
167 }
168 }
169
170 private static class MyHook extends Thread {
171 @Override
172 public void run() {
173 try {
174 Thread.sleep(10);
175 } catch (Exception e) {}
176 }
177 }
178
179 }