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