1 /* 2 * Copyright (c) 2022 Amazon.com, Inc. 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 /* 26 * @test id=rotation 27 * @requires vm.gc.Shenandoah 28 * 29 * @run main/othervm -Xmx1g -Xms1g -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions 30 * -XX:+ShenandoahRegionSampling -XX:+ShenandoahRegionSampling 31 * -Xlog:gc+region=debug:region-snapshots-%p.log::filesize=100,filecount=3 32 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive 33 * TestShenandoahLogRotation 34 */ 35 36 import java.io.File; 37 import java.util.Arrays; 38 import java.nio.file.Files; 39 40 41 42 public class TestShenandoahLogRotation { 43 44 static final long TARGET_MB = Long.getLong("target", 1); 45 46 static volatile Object sink; 47 48 public static void main(String[] args) throws Exception { 49 long count = TARGET_MB * 1024 * 1024 / 16; 50 for (long c = 0; c < count; c++) { 51 sink = new Object(); 52 Thread.sleep(1); 53 } 54 55 File directory = new File("."); 56 File[] files = directory.listFiles((dir, name) -> name.startsWith("region-snapshots")); 57 System.out.println(Arrays.toString(files)); 58 int smallFilesNumber = 0; 59 for (File file : files) { 60 if (file.length() < 100) { 61 smallFilesNumber++; 62 } 63 } 64 // Expect one more log file since the ShenandoahLogFileCount doesn't include the active log file 65 int expectedNumberOfFiles = 4; 66 if (files.length != expectedNumberOfFiles) { 67 throw new Error("There are " + files.length + " logs instead of the expected " + expectedNumberOfFiles + " " + files[0].getAbsolutePath()); 68 } 69 if (smallFilesNumber > 1) { 70 throw new Error("There should maximum one log with size < " + 100 + "B"); 71 } 72 } 73 74 }