1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/*
* Copyright (c) 2016, 2020, Red Hat, Inc. All rights reserved.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
/*
* @test TestEvilSyncBug
* @summary Tests for crash/assert when attaching init thread during shutdown
* @key gc
* @requires vm.gc.Shenandoah & !vm.graal.enabled
* @library /test/lib
* @modules java.base/jdk.internal.misc
* java.management
* @run driver/timeout=480 TestEvilSyncBug
*/
import java.util.*;
import java.util.concurrent.*;
import java.util.concurrent.locks.*;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;
public class TestEvilSyncBug {
private static final int NUM_RUNS = 100;
static Thread[] hooks = new MyHook[10000];
public static void main(String[] args) throws Exception {
if (args.length > 0) {
test();
} else {
// Use 1/4 of available processors to avoid over-saturation.
int numJobs = Math.max(1, Runtime.getRuntime().availableProcessors() / 4);
ExecutorService pool = Executors.newFixedThreadPool(numJobs);
Future<?>[] fs = new Future<?>[NUM_RUNS];
for (int c = 0; c < NUM_RUNS; c++) {
Callable<Void> task = () -> {
ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-Xms128m",
"-Xmx128m",
"-XX:+UnlockExperimentalVMOptions",
"-XX:+UnlockDiagnosticVMOptions",
"-XX:+UseShenandoahGC",
"-XX:ShenandoahGCHeuristics=aggressive",
"TestEvilSyncBug", "test");
OutputAnalyzer output = new OutputAnalyzer(pb.start());
output.shouldHaveExitValue(0);
return null;
};
fs[c] = pool.submit(task);
}
for (Future<?> f : fs) {
f.get();
}
pool.shutdown();
pool.awaitTermination(1, TimeUnit.HOURS);
}
}
private static void test() throws Exception {
for (int t = 0; t < hooks.length; t++) {
hooks[t] = new MyHook();
}
ExecutorService service = Executors.newFixedThreadPool(
2,
r -> {
Thread t = new Thread(r);
t.setDaemon(true);
return t;
}
);
List<Future<?>> futures = new ArrayList<>();
for (int c = 0; c < 100; c++) {
Runtime.getRuntime().addShutdownHook(hooks[c]);
final Test[] tests = new Test[1000];
for (int t = 0; t < tests.length; t++) {
tests[t] = new Test();
}
Future<?> f1 = service.submit(() -> {
Runtime.getRuntime().addShutdownHook(new MyHook());
IntResult2 r = new IntResult2();
for (Test test : tests) {
test.RL_Us(r);
}
});
Future<?> f2 = service.submit(() -> {
Runtime.getRuntime().addShutdownHook(new MyHook());
for (Test test : tests) {
test.WLI_Us();
}
});
futures.add(f1);
futures.add(f2);
}
for (Future<?> f : futures) {
f.get();
}
}
public static class IntResult2 {
int r1, r2;
}
public static class Test {
final StampedLock lock = new StampedLock();
int x, y;
public void RL_Us(IntResult2 r) {
StampedLock lock = this.lock;
long stamp = lock.readLock();
r.r1 = x;
r.r2 = y;
lock.unlock(stamp);
}
public void WLI_Us() {
try {
StampedLock lock = this.lock;
long stamp = lock.writeLockInterruptibly();
x = 1;
y = 2;
lock.unlock(stamp);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
}
private static class MyHook extends Thread {
@Override
public void run() {
try {
Thread.sleep(10);
} catch (Exception e) {}
}
}
}
|
