64 lines
2.5 KiB
Java
64 lines
2.5 KiB
Java
/*
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* Copyright (c) 2015, 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 TestSelectDefaultGC
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* @summary Test selection of GC when no GC option is specified
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* @bug 8068582
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* @key gc
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* @library /testlibrary
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* @modules java.base/sun.misc
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* java.management
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* @run driver TestSelectDefaultGC
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*/
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import jdk.test.lib.*;
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import java.util.regex.*;
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public class TestSelectDefaultGC {
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public static void assertVMOption(OutputAnalyzer output, String option, boolean value) {
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output.shouldMatch(" " + option + " .*=.* " + value + " ");
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}
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public static void main(String[] args) throws Exception {
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// Start VM without specifying GC
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ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+PrintFlagsFinal", "-version");
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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output.shouldHaveExitValue(0);
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boolean isServerVM = Platform.isServer();
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boolean isEmbeddedVM = Platform.isEmbedded();
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// Verify GC selection
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// G1 is default for non-embedded server VMs
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assertVMOption(output, "UseG1GC", isServerVM && !isEmbeddedVM);
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// Parallel is default for embedded server VMs
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assertVMOption(output, "UseParallelGC", isServerVM && isEmbeddedVM);
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assertVMOption(output, "UseParallelOldGC", isServerVM && isEmbeddedVM);
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// Serial is default for non-server VMs
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assertVMOption(output, "UseSerialGC", !isServerVM);
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assertVMOption(output, "UseConcMarkSweepGC", false);
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assertVMOption(output, "UseParNewGC", false);
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}
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}
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