File: DegradedMethodsThrowUOE.java

package info (click to toggle)
openjdk-21 21.0.8%2B9-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 823,976 kB
  • sloc: java: 5,613,338; xml: 1,643,607; cpp: 1,296,296; ansic: 420,291; asm: 404,850; objc: 20,994; sh: 15,271; javascript: 11,245; python: 6,895; makefile: 2,362; perl: 357; awk: 351; sed: 172; jsp: 24; csh: 3
file content (132 lines) | stat: -rw-r--r-- 4,469 bytes parent folder | download
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
/*
 * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * 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
 * @bug  8289610 8249627 8205132
 * @summary Test that Thread stop/suspend/resume/countStackFrames throw UOE
 * @run junit DegradedMethodsThrowUOE
 */

import java.time.Duration;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.locks.LockSupport;
import java.util.function.Consumer;
import java.util.stream.Stream;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.MethodSource;
import static org.junit.jupiter.api.Assertions.*;

class DegradedMethodsThrowUOE {

    /**
     * Returns a stream of operations on a Thread that should throw UOE.
     */
    static Stream<Consumer<Thread>> ops() {
        return Stream.<Consumer<Thread>>of(
                Thread::stop,
                Thread::suspend,
                Thread::resume,
                Thread::countStackFrames
        );
    }

    /**
     * Test degraded method on current thread.
     */
    @ParameterizedTest
    @MethodSource("ops")
    void testCurrentThread(Consumer<Thread> op) {
        var thread = Thread.currentThread();
        assertThrows(UnsupportedOperationException.class, () -> op.accept(thread));
    }

    /**
     * Test degraded method on an unstarted thread.
     */
    @ParameterizedTest
    @MethodSource("ops")
    void testUnstartedThread(Consumer<Thread> op) {
        Thread thread = new Thread(() -> { });
        assertThrows(UnsupportedOperationException.class, () -> op.accept(thread));
        assertTrue(thread.getState() == Thread.State.NEW);
    }

    /**
     * Test degraded method on a thread spinning in a loop.
     */
    @ParameterizedTest
    @MethodSource("ops")
    void testRunnableThread(Consumer<Thread> op) throws Exception {
        AtomicBoolean done = new AtomicBoolean();
        Thread thread = new Thread(() -> {
            while (!done.get()) {
                Thread.onSpinWait();
            }
        });
        thread.start();
        try {
            assertThrows(UnsupportedOperationException.class, () -> op.accept(thread));

            // thread should not terminate
            boolean terminated = thread.join(Duration.ofMillis(500));
            assertFalse(terminated);
        } finally {
            done.set(true);
            thread.join();
        }
    }

    /**
     * Test degraded method on a thread that is parked.
     */
    @ParameterizedTest
    @MethodSource("ops")
    void testWaitingThread(Consumer<Thread> op) throws Exception {
        Thread thread = new Thread(LockSupport::park);
        thread.start();
        try {
            // wait for thread to park
            while ((thread.getState() != Thread.State.WAITING)) {
                Thread.sleep(10);
            }
            assertThrows(UnsupportedOperationException.class, () -> op.accept(thread));
            assertTrue(thread.getState() == Thread.State.WAITING);
        } finally {
            LockSupport.unpark(thread);
            thread.join();
        }
    }

    /**
     * Test degraded method on a terminated thread.
     */
    @ParameterizedTest
    @MethodSource("ops")
    void testTerminatedThread(Consumer<Thread> op) throws Exception {
        Thread thread = new Thread(() -> { });
        thread.start();
        thread.join();
        assertThrows(UnsupportedOperationException.class, () -> op.accept(thread));
        assertTrue(thread.getState() == Thread.State.TERMINATED);
    }
}