--- /dev/null 2016-08-30 09:55:17.854570508 +0200 +++ new/test/gc/g1/TestAgeOutput.java 2016-08-31 11:44:47.791318663 +0200 @@ -0,0 +1,101 @@ +/* + * Copyright (c) 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 TestAgeOutput + * @bug 8164936 + * @summary Check that G1 prints an age table even for the first garbage collection + * @key gc + * @requires vm.gc.G1 + * @modules java.base/jdk.internal.misc + * @library /test/lib + * @build sun.hotspot.WhiteBox + * @run main ClassFileInstaller sun.hotspot.WhiteBox + * @run driver TestAgeOutput + */ + +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 TestAgeOutput { + + public static void checkPattern(String pattern, String what) throws Exception { + Pattern r = Pattern.compile(pattern); + Matcher m = r.matcher(what); + + if (!m.find()) { + throw new RuntimeException("Could not find pattern " + pattern + " in output"); + } + } + + public static void runTest() throws Exception { + final String[] arguments = { + "-Xbootclasspath/a:.", + "-XX:+UnlockExperimentalVMOptions", + "-XX:+UnlockDiagnosticVMOptions", + "-XX:+WhiteBoxAPI", + "-XX:+UseG1GC", + "-Xmx10M", + "-Xlog:gc+age=trace", + GCTest.class.getName() + }; + + ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(arguments); + OutputAnalyzer output = new OutputAnalyzer(pb.start()); + + output.shouldHaveExitValue(0); + + System.out.println(output.getStdout()); + + String stdout = output.getStdout(); + + checkPattern(".*GC\\(0\\) .*Desired survivor size.*", stdout); + checkPattern(".*GC\\(0\\) .*Age table with threshold.*", stdout); + checkPattern(".*GC\\(0\\) .*- age 1:.*", stdout); + } + + 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); + } + } +} +