1 /* 2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test TestNumWorkerOutput 26 * @bug 8165292 27 * @summary Check that when PrintGCDetails is enabled, gc,task output is printed only once per collection. 28 * @key gc 29 * @requires vm.gc=="null" 30 * @modules java.base/jdk.internal.misc 31 * @library /test/lib 32 * @build sun.hotspot.WhiteBox 33 * @run main ClassFileInstaller sun.hotspot.WhiteBox 34 * @run main/othervm -XX:+UseConcMarkSweepGC TestNumWorkerOutput UseConcMarkSweepGC 35 * @run main/othervm -XX:+UseG1GC TestNumWorkerOutput UseG1GC 36 */ 37 38 import sun.hotspot.WhiteBox; 39 40 import java.util.regex.Matcher; 41 import java.util.regex.Pattern; 42 43 import jdk.test.lib.Platform; 44 import jdk.test.lib.process.OutputAnalyzer; 45 import jdk.test.lib.process.ProcessTools; 46 47 import static jdk.test.lib.Asserts.*; 48 49 public class TestNumWorkerOutput { 50 51 public static void checkPatternOnce(String pattern, String what) throws Exception { 52 Pattern r = Pattern.compile(pattern); 53 Matcher m = r.matcher(what); 54 55 if (!m.find()) { 56 throw new RuntimeException("Could not find pattern " + pattern + " in output"); 57 } 58 if (m.find()) { 59 throw new RuntimeException("Could find pattern " + pattern + " in output more than once"); 60 } 61 } 62 63 public static void runTest(String gcArg) throws Exception { 64 final String[] arguments = { 65 "-Xbootclasspath/a:.", 66 "-XX:+UnlockExperimentalVMOptions", 67 "-XX:+UnlockDiagnosticVMOptions", 68 "-XX:+WhiteBoxAPI", 69 "-XX:+" + gcArg, 70 "-Xmx10M", 71 "-XX:+PrintGCDetails", 72 GCTest.class.getName() 73 }; 74 75 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(arguments); 76 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 77 78 output.shouldHaveExitValue(0); 79 80 System.out.println(output.getStdout()); 81 82 String stdout = output.getStdout(); 83 84 checkPatternOnce(".*[info.*].*[gc,task.*].*GC\\(0\\) .*Using \\d+ workers of \\d+ for evacuation.*", stdout); 85 } 86 87 public static void main(String[] args) throws Exception { 88 runTest(args[0]); 89 } 90 91 static class GCTest { 92 private static final WhiteBox WB = WhiteBox.getWhiteBox(); 93 94 public static Object holder; 95 96 public static void main(String [] args) { 97 holder = new byte[100]; 98 WB.youngGC(); 99 System.out.println(holder); 100 } 101 } 102 } 103