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/*
* Copyright (c) 2013, 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.
*/
/*
* @test TestG1HeapRegionSize
* @key gc
* @bug 8021879
* @requires vm.gc.G1
* @summary Verify that the flag G1HeapRegionSize is updated properly
* @modules java.base/jdk.internal.misc
* @modules java.management/sun.management
* @library /test/lib
* @run main TestG1HeapRegionSize
*/
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.ArrayList;
import java.util.Arrays;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;
public class TestG1HeapRegionSize {
private static void checkG1HeapRegionSize(String[] flags, int expectedValue, int exitValue) throws Exception {
ArrayList<String> flagList = new ArrayList<String>();
flagList.addAll(Arrays.asList(flags));
flagList.add("-XX:+UseG1GC");
flagList.add("-XX:+PrintFlagsFinal");
flagList.add("-version");
ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(flagList.toArray(new String[0]));
OutputAnalyzer output = new OutputAnalyzer(pb.start());
output.shouldHaveExitValue(exitValue);
if (exitValue == 0) {
String stdout = output.getStdout();
int flagValue = getFlagValue("G1HeapRegionSize", stdout);
if (flagValue != expectedValue) {
throw new RuntimeException("Wrong value for G1HeapRegionSize. Expected " + expectedValue + " but got " + flagValue);
}
}
}
private static int getFlagValue(String flag, String where) {
Matcher m = Pattern.compile(flag + "\\s+:?=\\s+\\d+").matcher(where);
if (!m.find()) {
throw new RuntimeException("Could not find value for flag " + flag + " in output string");
}
String match = m.group();
return Integer.parseInt(match.substring(match.lastIndexOf(" ") + 1, match.length()));
}
public static void main(String args[]) throws Exception {
final int M = 1024 * 1024;
checkG1HeapRegionSize(new String[] { "-Xmx64m" /* default is 1m */ }, 1*M, 0);
checkG1HeapRegionSize(new String[] { "-Xmx64m", "-XX:G1HeapRegionSize=2m" }, 2*M, 0);
checkG1HeapRegionSize(new String[] { "-Xmx64m", "-XX:G1HeapRegionSize=3m" }, 2*M, 0);
checkG1HeapRegionSize(new String[] { "-Xmx256m", "-XX:G1HeapRegionSize=32m" }, 32*M, 0);
checkG1HeapRegionSize(new String[] { "-Xmx256m", "-XX:G1HeapRegionSize=64m" }, 32*M, 1);
}
}
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