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Java example source code file (TestPrintRegionRememberedSetInfo.java)

This example Java source code file (TestPrintRegionRememberedSetInfo.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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Java - Java tags/keywords

arraylist, exception, interruptedexception, outputanalyzer, phase, runtimeexception, string, testprintregionrememberedsetinfo, unexpected, util, xx:+g1printregionlivenessinfo, xx\:\+explicitgcinvokesconcurrent, xx\:\+printregionlivenessinfo, xx\:\+unlockdiagnosticvmoptions, xx\:\+useg1gc

The TestPrintRegionRememberedSetInfo.java Java example source code

/*
 * Copyright (c) 2013, 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.
 */

/**
 * @test TestPrintRegionRememberedSetInfo
 * @key gc
 * @bug 8014240
 * @summary Test output of G1PrintRegionRememberedSetInfo
 * @library /testlibrary
 * @run main TestPrintRegionRememberedSetInfo
 * @author thomas.schatzl@oracle.com
 */

import com.oracle.java.testlibrary.*;
import java.lang.Thread;
import java.util.ArrayList;
import java.util.Arrays;

class RunAndWaitForMarking {
    public static void main(String[] args) {
        System.gc();
        try {
            Thread.sleep(200);
        } catch (InterruptedException e) {
        }
    }
}

public class TestPrintRegionRememberedSetInfo {

    public static String runTest(String arg) throws Exception {
        ArrayList<String> finalargs = new ArrayList();
        String[] defaultArgs = new String[] {
            "-XX:+UseG1GC",
            "-Xmx10m",
            "-XX:+ExplicitGCInvokesConcurrent",
            "-XX:+UnlockDiagnosticVMOptions",
            "-XX:+G1PrintRegionLivenessInfo",
            "-XX:G1HeapRegionSize=1M",
            "-XX:InitiatingHeapOccupancyPercent=0",
        };

        finalargs.addAll(Arrays.asList(defaultArgs));
        finalargs.add(arg);

        finalargs.add(RunAndWaitForMarking.class.getName());

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
            finalargs.toArray(new String[0]));
        OutputAnalyzer output = new OutputAnalyzer(pb.start());
        output.shouldHaveExitValue(0);

        String result = output.getStdout();
        return result;
    }

    public static void main(String[] args) throws Exception {
        String result;

        result = runTest("-XX:+G1PrintRegionLivenessInfo");
        // check that we got region statistics output
        if (result.indexOf("PHASE") == -1) {
            throw new RuntimeException("Unexpected output from -XX:+PrintRegionLivenessInfo found.");
        }

        result = runTest("-XX:-G1PrintRegionLivenessInfo");
        if (result.indexOf("remset") != -1) {
            throw new RuntimeException("Should find remembered set information in output.");
        }
    }
}

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