| /* |
| * 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"); |
| } |
| } |
| } |
| |