hotspot/test/gc/class_unloading/TestCMSClassUnloadingEnabledHWM.java
author stefank
Mon, 18 Aug 2014 14:12:48 +0200
changeset 26152 2e5e15618d8e
parent 25958 8dc85547d6d6
child 26702 20051b40655a
permissions -rw-r--r--
8055275: Several gc/class_unloading/ tests fail due to missed +UnlockDiagnosticVMOptions flag Reviewed-by: mgerdin, jwilhelm
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/*
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 * Copyright (c) 2014, 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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/*
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 * @test
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 * @key gc
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 * @bug 8049831
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 * @library /testlibrary /testlibrary/whitebox
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 * @build TestCMSClassUnloadingEnabledHWM AllocateBeyondMetaspaceSize
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 * @run main ClassFileInstaller sun.hotspot.WhiteBox
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 *                              sun.hotspot.WhiteBox$WhiteBoxPermission
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 * @run driver TestCMSClassUnloadingEnabledHWM
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 * @summary Test that -XX:-CMSClassUnloadingEnabled will trigger a Full GC when more than MetaspaceSize metadata is allocated.
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 */
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import com.oracle.java.testlibrary.OutputAnalyzer;
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import com.oracle.java.testlibrary.ProcessTools;
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import java.util.ArrayList;
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import java.util.Arrays;
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public class TestCMSClassUnloadingEnabledHWM {
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  private static long MetaspaceSize = 32 * 1024 * 1024;
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  private static long YoungGenSize  = 32 * 1024 * 1024;
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  private static OutputAnalyzer run(boolean enableUnloading) throws Exception {
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    ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
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      "-Xbootclasspath/a:.",
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      "-XX:+UnlockDiagnosticVMOptions",
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      "-XX:+WhiteBoxAPI",
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      "-XX:MetaspaceSize=" + MetaspaceSize,
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      "-Xmn" + YoungGenSize,
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      "-XX:+UseConcMarkSweepGC",
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      "-XX:" + (enableUnloading ? "+" : "-") + "CMSClassUnloadingEnabled",
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      "-XX:+PrintHeapAtGC",
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      "-XX:+PrintGCDetails",
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      "AllocateBeyondMetaspaceSize",
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      "" + MetaspaceSize,
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      "" + YoungGenSize);
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    return new OutputAnalyzer(pb.start());
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  }
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  public static OutputAnalyzer runWithCMSClassUnloading() throws Exception {
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    return run(true);
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  }
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  public static OutputAnalyzer runWithoutCMSClassUnloading() throws Exception {
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    return run(false);
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  }
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  public static void testWithoutCMSClassUnloading() throws Exception {
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    // -XX:-CMSClassUnloadingEnabled is used, so we expect a full GC instead of a concurrent cycle.
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    OutputAnalyzer out = runWithoutCMSClassUnloading();
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    out.shouldMatch(".*Full GC.*");
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    out.shouldNotMatch(".*CMS Initial Mark.*");
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  }
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  public static void testWithCMSClassUnloading() throws Exception {
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    // -XX:+CMSClassUnloadingEnabled is used, so we expect a concurrent cycle instead of a full GC.
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    OutputAnalyzer out = runWithCMSClassUnloading();
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    out.shouldMatch(".*CMS Initial Mark.*");
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    out.shouldNotMatch(".*Full GC.*");
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  }
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  public static void main(String args[]) throws Exception {
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    testWithCMSClassUnloading();
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    testWithoutCMSClassUnloading();
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  }
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}
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