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/*
* 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 supports
* phase control. The invoking test must provide WhiteBox access.
*/
import sun.hotspot.WhiteBox;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
public class CheckSupported {
private static final WhiteBox WB = WhiteBox.getWhiteBox();
private static Set<String> toSet(List<String> list, String which)
throws Exception
{
Set<String> result = new HashSet<String>(list);
if (result.size() < list.size()) {
throw new RuntimeException(which + " phases contains duplicates");
}
return result;
}
private static void checkPhases(String[] expectedPhases) throws Exception {
String[] actualPhases = WB.getConcurrentGCPhases();
List<String> expectedList = Arrays.asList(expectedPhases);
List<String> actualList = Arrays.asList(actualPhases);
Set<String> expected = toSet(expectedList, "Expected");
Set<String> actual = toSet(actualList, "Actual");
expected.removeAll(actualList);
actual.removeAll(expectedList);
boolean match = true;
if (!expected.isEmpty()) {
match = false;
System.out.println("Unexpected phases:");
for (String s: expected) {
System.out.println(" " + s);
}
}
if (!actual.isEmpty()) {
match = false;
System.out.println("Expected but missing phases:");
for (String s: actual) {
System.out.println(" " + s);
}
}
if (!match) {
throw new RuntimeException("Mismatch between expected and actual phases");
}
}
public static void check(String gcName, String[] phases) throws Exception {
// Verify supported.
if (!WB.supportsConcurrentGCPhaseControl()) {
throw new RuntimeException(
gcName + " unexpectedly missing phase control support");
}
checkPhases(phases);
// Verify IllegalArgumentException thrown by request attempt
// with unknown phase.
boolean illegalArgumentThrown = false;
try {
WB.requestConcurrentGCPhase("UNKNOWN PHASE");
} catch (IllegalArgumentException e) {
// Expected.
illegalArgumentThrown = true;
} catch (Exception e) {
throw new RuntimeException(
gcName + ": Unexpected exception when requesting unknown phase: " + e.toString());
}
if (!illegalArgumentThrown) {
throw new RuntimeException(
gcName + ": No exception when requesting unknown phase");
}
}
}
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