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
|
/*
* Copyright (c) 2017, 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.
*/
package gc.concurrent_phase_control;
/*
* Utility class that provides verification of expected behavior of
* the Concurrent GC Phase Control WB API when the current GC does not
* support phase control. The invoking test must provide WhiteBox access.
*/
import sun.hotspot.WhiteBox;
public class CheckUnsupported {
private static final WhiteBox WB = WhiteBox.getWhiteBox();
public static void check(String gcName) throws Exception {
// Verify unsupported.
if (WB.supportsConcurrentGCPhaseControl()) {
throw new RuntimeException(
gcName + " unexpectedly supports phase control");
}
// Verify phase sequence is empty.
String[] phases = WB.getConcurrentGCPhases();
if (phases.length > 0) {
throw new RuntimeException(
gcName + " unexpectedly has non-empty phases");
}
// Verify IllegalStateException thrown by request attempt.
boolean illegalStateThrown = false;
try {
WB.requestConcurrentGCPhase("UNKNOWN PHASE");
} catch (IllegalStateException e) {
// Expected.
illegalStateThrown = true;
} catch (Exception e) {
throw new RuntimeException(
gcName + ": Unexpected exception when requesting phase: "
+ e.toString());
}
if (!illegalStateThrown) {
throw new RuntimeException(
gcName + ": No exception when requesting phase");
}
}
}
|
