1 /* 2 * Copyright (c) 2013, 2018, 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 TestStringTableStats.java 26 * @bug 8027476 8027455 27 * @summary Ensure that the G1TraceStringTableScrubbing prints the expected message. 28 * @key gc 29 * @requires vm.gc.G1 30 * @library /test/lib 31 * @modules java.base/jdk.internal.misc 32 * java.management 33 */ 34 35 import jdk.test.lib.process.OutputAnalyzer; 36 import jdk.test.lib.process.ProcessTools; 37 38 public class TestStringTableStats { 39 public static void main(String[] args) throws Exception { 40 41 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC", 42 "-XX:+UnlockExperimentalVMOptions", 43 "-Xlog:gc+stringtable=trace", 44 SystemGCTest.class.getName()); 45 46 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 47 48 System.out.println("Output:\n" + output.getOutput()); 49 50 output.shouldMatch("GC\\(\\d+\\) Cleaned string table"); 51 output.shouldHaveExitValue(0); 52 } 53 54 static class SystemGCTest { 55 public static void main(String [] args) { 56 System.out.println("Calling System.gc()"); 57 System.gc(); 58 } 59 } 60 }