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 }