1 /*
   2  * Copyright (c) 2012, 2015, 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 Test6941923.java
  26  * @bug 6941923
  27  * @summary test flags for gc log rotation
  28  * @library /testlibrary
  29  * @modules java.base/sun.misc
  30  *          java.management
  31  * @run main/othervm/timeout=600 Test6941923
  32  *
  33  */
  34 import jdk.test.lib.*;
  35 import java.io.File;
  36 import java.io.FilenameFilter;
  37 import java.util.ArrayList;
  38 import java.util.Arrays;
  39 
  40 class GCLoggingGenerator {
  41 
  42     public static void main(String[] args) throws Exception {
  43 
  44         long sizeOfLog = Long.parseLong(args[0]);
  45         long lines = sizeOfLog / 80;
  46         // full.GC generates ad least 1-line which is not shorter then 80 chars
  47         // for some GC 2 shorter lines are generated
  48         for (long i = 0; i < lines; i++) {
  49             System.gc();
  50         }
  51     }
  52 }
  53 
  54 public class Test6941923 {
  55 
  56     static final File currentDirectory = new File(".");
  57     static final String logFileName = "test.log";
  58     static final int logFileSizeK = 16;
  59     static FilenameFilter logFilter = new FilenameFilter() {
  60         @Override
  61         public boolean accept(File dir, String name) {
  62             return name.startsWith(logFileName);
  63         }
  64     };
  65 
  66     public static void cleanLogs() {
  67         for (File log : currentDirectory.listFiles(logFilter)) {
  68             if (!log.delete()) {
  69                 throw new Error("Unable to delete " + log.getAbsolutePath());
  70             }
  71         }
  72     }
  73 
  74     public static void runTest(int numberOfFiles) throws Exception {
  75 
  76         ArrayList<String> args = new ArrayList();
  77         String[] logOpts = new String[]{
  78             "-cp", System.getProperty("java.class.path"),
  79             "-Xloggc:" + logFileName,
  80             "-XX:-DisableExplicitGC", // to sure that System.gc() works
  81             "-XX:+PrintGC", "-XX:+PrintGCDetails", "-XX:+UseGCLogFileRotation",
  82             "-XX:NumberOfGCLogFiles=" + numberOfFiles,
  83             "-XX:GCLogFileSize=" + logFileSizeK + "K", "-Xmx128M"};
  84         // System.getProperty("test.java.opts") is '' if no options is set
  85         // need to skip such empty
  86         String[] externalVMopts = System.getProperty("test.java.opts").length() == 0
  87                 ? new String[0]
  88                 : System.getProperty("test.java.opts").split(" ");
  89         args.addAll(Arrays.asList(externalVMopts));
  90         args.addAll(Arrays.asList(logOpts));
  91         args.add(GCLoggingGenerator.class.getName());
  92         args.add(String.valueOf(numberOfFiles * logFileSizeK * 1024));
  93         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(args.toArray(new String[0]));
  94         pb.redirectErrorStream(true);
  95         pb.redirectOutput(new File(GCLoggingGenerator.class.getName() + ".log"));
  96         Process process = pb.start();
  97         int result = process.waitFor();
  98         if (result != 0) {
  99             throw new Error("Unexpected exit code = " + result);
 100         }
 101         File[] logs = currentDirectory.listFiles(logFilter);
 102         int smallFilesNumber = 0;
 103         for (File log : logs) {
 104             if (log.length() < logFileSizeK * 1024) {
 105                 smallFilesNumber++;
 106             }
 107         }
 108         if (logs.length != numberOfFiles) {
 109             throw new Error("There are only " + logs.length + " logs instead " + numberOfFiles);
 110         }
 111         if (smallFilesNumber > 1) {
 112             throw new Error("There should maximum one log with size < " + logFileSizeK + "K");
 113         }
 114     }
 115 
 116     public static void main(String[] args) throws Exception {
 117         cleanLogs();
 118         runTest(1);
 119         cleanLogs();
 120         runTest(3);
 121         cleanLogs();
 122     }
 123 }