1 /*

     2  * Copyright (c) 2017, 2019, 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 /*

    26  * @test

    27  * @summary Write a lots of shared strings.

    28  * @requires vm.cds.archived.java.heap

    29  * @library /test/hotspot/jtreg/runtime/cds/appcds /test/lib

    30  * @modules jdk.jartool/sun.tools.jar

    31  * @build HelloString

    32  * @run driver/timeout=500 SharedStringsStress

    33  */

    34 import java.io.File;

    35 import java.io.FileOutputStream;

    36 import java.io.OutputStreamWriter;

    37 import java.io.PrintWriter;

    38 import jdk.test.lib.process.OutputAnalyzer;

    39 import jdk.test.lib.process.ProcessTools;

    40 

    41 public class SharedStringsStress {

    42     static String sharedArchiveConfigFile = System.getProperty("user.dir") + File.separator + "SharedStringsStress_gen.txt";

    43 

    44     public static void main(String[] args) throws Exception {

    45         try (FileOutputStream fos = new FileOutputStream(sharedArchiveConfigFile)) {

    46             PrintWriter out = new PrintWriter(new OutputStreamWriter(fos));

    47             out.println("VERSION: 1.0");

    48             out.println("@SECTION: String");

    49             out.println("31: shared_test_string_unique_14325");

    50             for (int i=0; i<200000; i++) {

    51                 String s = "generated_string " + i;

    52                 out.println(s.length() + ": " + s);

    53             }

    54             out.close();

    55         }

    56 

    57         SharedStringsUtils.run(args, SharedStringsStress::test);

    58     }

    59 

    60     public static void test(String[] args) throws Exception {

    61         String vmOptionsPrefix[] = SharedStringsUtils.getChildVMOptionsPrefix();

    62         String appJar = JarBuilder.build("SharedStringsStress", "HelloString");

    63 

    64         String test_cases[][] = {

    65             // default heap size

    66             {},

    67 

    68             // Test for handling of heap fragmentation. With sharedArchiveConfigFile, we will dump about

    69             // 18MB of shared objects on 64 bit VM (smaller on 32-bit).

    70             //

    71             // During dump time, an extra copy of these objects are allocated,

    72             // so we need about 36MB, plus a few MB for other system data. So 64MB total heap

    73             // should be enough.

    74             //

    75             // The VM should executed a full GC to maximize contiguous free space and

    76             // avoid fragmentation.

    77             {"-Xmx64m"},

    78         };

    79 

    80         for (String[] extra_opts: test_cases) {

    81             vmOptionsPrefix = TestCommon.concat(vmOptionsPrefix, extra_opts);

    82 

    83             OutputAnalyzer dumpOutput = TestCommon.dump(appJar, TestCommon.list("HelloString"),

    84                 TestCommon.concat(vmOptionsPrefix,

    85                     "-XX:SharedArchiveConfigFile=" + sharedArchiveConfigFile,

    86                     "-Xlog:gc+region+cds",

    87                     "-Xlog:gc+region=trace"));

    88             TestCommon.checkDump(dumpOutput);

    89             OutputAnalyzer execOutput = TestCommon.exec(appJar,

    90                 TestCommon.concat(vmOptionsPrefix, "HelloString"));

    91             TestCommon.checkExec(execOutput);

    92         }

    93     }

    94 }