| /* |
| * 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); |
| } |
| } |