112 lines
3.8 KiB
Java
112 lines
3.8 KiB
Java
/*
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* Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package gc.concurrent_phase_control;
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/*
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* Utility class that provides verification of expected behavior of
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* the Concurrent GC Phase Control WB API when the current GC supports
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* phase control. The invoking test must provide WhiteBox access.
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*/
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import sun.hotspot.WhiteBox;
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import java.util.Arrays;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Set;
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public class CheckSupported {
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private static final WhiteBox WB = WhiteBox.getWhiteBox();
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private static Set<String> toSet(List<String> list, String which)
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throws Exception
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{
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Set<String> result = new HashSet<String>(list);
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if (result.size() < list.size()) {
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throw new RuntimeException(which + " phases contains duplicates");
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}
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return result;
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}
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private static void checkPhases(String[] expectedPhases) throws Exception {
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String[] actualPhases = WB.getConcurrentGCPhases();
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List<String> expectedList = Arrays.asList(expectedPhases);
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List<String> actualList = Arrays.asList(actualPhases);
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Set<String> expected = toSet(expectedList, "Expected");
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Set<String> actual = toSet(actualList, "Actual");
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expected.removeAll(actualList);
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actual.removeAll(expectedList);
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boolean match = true;
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if (!expected.isEmpty()) {
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match = false;
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System.out.println("Unexpected phases:");
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for (String s: expected) {
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System.out.println(" " + s);
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}
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}
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if (!actual.isEmpty()) {
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match = false;
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System.out.println("Expected but missing phases:");
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for (String s: actual) {
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System.out.println(" " + s);
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}
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}
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if (!match) {
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throw new RuntimeException("Mismatch between expected and actual phases");
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}
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}
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public static void check(String gcName, String[] phases) throws Exception {
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// Verify supported.
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if (!WB.supportsConcurrentGCPhaseControl()) {
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throw new RuntimeException(
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gcName + " unexpectedly missing phase control support");
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}
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checkPhases(phases);
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// Verify IllegalArgumentException thrown by request attempt
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// with unknown phase.
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boolean illegalArgumentThrown = false;
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try {
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WB.requestConcurrentGCPhase("UNKNOWN PHASE");
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} catch (IllegalArgumentException e) {
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// Expected.
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illegalArgumentThrown = true;
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} catch (Exception e) {
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throw new RuntimeException(
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gcName + ": Unexpected exception when requesting unknown phase: " + e.toString());
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}
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if (!illegalArgumentThrown) {
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throw new RuntimeException(
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gcName + ": No exception when requesting unknown phase");
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}
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}
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}
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