| /* |
| * Copyright (c) 2016, 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. |
| */ |
| import jdk.test.lib.process.ProcessTools; |
| import jdk.test.lib.process.OutputAnalyzer; |
| import jdk.test.lib.Asserts; |
| import sun.hotspot.WhiteBox; |
| |
| /* @test TestMetaspaceCMSCancel |
| * @bug 8026752 |
| * @summary Tests cancel of CMS concurrent cycle for Metaspace after a full GC |
| * @library /test/lib |
| * @modules java.base/jdk.internal.misc |
| * @build sun.hotspot.WhiteBox |
| * @run main ClassFileInstaller sun.hotspot.WhiteBox |
| * @run main/othervm TestMetaspaceCMSCancel |
| */ |
| |
| |
| public class TestMetaspaceCMSCancel { |
| |
| public static void main(String[] args) throws Exception { |
| // Set a small MetaspaceSize so that a CMS concurrent collection will be |
| // scheduled. Set CMSWaitDuration to 5s so that the concurrent collection |
| // start may be delayed. It does not guarantee 5s before the start of the |
| // concurrent collection but does increase the probability that it will |
| // be started later. System.gc() is used to invoke a full collection. Set |
| // ExplicitGCInvokesConcurrent to off so it is a STW collection. |
| ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-Xbootclasspath/a:.", |
| "-XX:+UnlockDiagnosticVMOptions", |
| "-XX:+WhiteBoxAPI", |
| "-XX:+UseConcMarkSweepGC", |
| "-XX:MetaspaceSize=2m", |
| "-XX:CMSWaitDuration=5000", |
| "-XX:-ExplicitGCInvokesConcurrent", |
| "-Xlog:gc*=debug", |
| MetaspaceGCTest.class.getName()); |
| |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| output.shouldNotContain("Concurrent Reset"); |
| output.shouldHaveExitValue(0); |
| } |
| |
| static class MetaspaceGCTest { |
| public static void main(String [] args) { |
| WhiteBox wb = WhiteBox.getWhiteBox(); |
| System.gc(); |
| Asserts.assertFalse(wb.metaspaceShouldConcurrentCollect()); |
| } |
| } |
| } |