1 /*
   2  * Copyright (c) 2017, 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 /*
  26  * @test
  27  * @summary Write a lots of shared strings.
  28  * @requires vm.cds.archived.java.heap
  29  * @library /test/hotspot/jtreg/runtime/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 }