| /* |
| * Copyright (c) 2015, 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 TestPLABOutput |
| * @bug 8140585 |
| * @summary Check that G1 does not report empty PLAB statistics in the first evacuation. |
| * @requires vm.gc.G1 |
| * @key gc |
| * @modules java.base/jdk.internal.misc |
| * @library /test/lib |
| * @build sun.hotspot.WhiteBox |
| * @run main ClassFileInstaller sun.hotspot.WhiteBox |
| * @run driver TestPLABOutput |
| */ |
| |
| import sun.hotspot.WhiteBox; |
| |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| import jdk.test.lib.Platform; |
| import jdk.test.lib.process.OutputAnalyzer; |
| import jdk.test.lib.process.ProcessTools; |
| |
| import static jdk.test.lib.Asserts.*; |
| |
| public class TestPLABOutput { |
| |
| public static void runTest() throws Exception { |
| final String[] arguments = { |
| "-Xbootclasspath/a:.", |
| "-XX:+UnlockExperimentalVMOptions", |
| "-XX:+UnlockDiagnosticVMOptions", |
| "-XX:+WhiteBoxAPI", |
| "-XX:+UseG1GC", |
| "-Xmx10M", |
| "-Xlog:gc+plab=debug", |
| GCTest.class.getName() |
| }; |
| |
| ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(arguments); |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| |
| output.shouldHaveExitValue(0); |
| |
| System.out.println(output.getStdout()); |
| |
| String pattern = ".*GC\\(0\\) .*allocated: (\\d+).*"; |
| Pattern r = Pattern.compile(pattern); |
| Matcher m = r.matcher(output.getStdout()); |
| |
| if (!m.find()) { |
| throw new RuntimeException("Could not find any PLAB statistics output"); |
| } |
| int allocated = Integer.parseInt(m.group(1)); |
| assertGT(allocated, 0, "Did not allocate any memory during test"); |
| } |
| |
| public static void main(String[] args) throws Exception { |
| runTest(); |
| } |
| |
| static class GCTest { |
| private static final WhiteBox WB = WhiteBox.getWhiteBox(); |
| |
| public static Object holder; |
| |
| public static void main(String [] args) { |
| holder = new byte[100]; |
| WB.youngGC(); |
| System.out.println(holder); |
| } |
| } |
| } |
| |