rev 59093 : imported patch randomness-code_vmTestbase_unloading

   1 /*
   2  * Copyright (c) 2015, 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 package gc.g1.unloading.bytecode;
  25 
  26 import java.io.BufferedWriter;
  27 import java.io.File;
  28 import java.io.FileWriter;
  29 import java.io.IOException;
  30 import java.util.ArrayList;
  31 import java.util.List;


  32 
  33 /*
  34  *  This class is compiled and invoke due the build to produce
  35  *  HumongousTemplateClass.java. The size of generated file is
  36  *  too large to store it in the repository.
  37  */
  38 
  39 public class HumongousTemplateClassGen {
  40 
  41 private static final String CLASS_NAME = "HumongousTemplateClass";
  42 private static final String PKG_NAME = "gc.g1.unloading.bytecode";
  43 private static final String PKG_DIR_NAME = PKG_NAME.replace(".",
  44         File.separator);
  45 private static final int ITERATIONS = 1075;
  46 private static final double MG = (Math.pow(1024, 2));
  47 private static final int RECORD_COUNT = 16 * ITERATIONS + 10;
  48 
  49 public static void addFileTop(List<String> records) {
  50     records.add("package " + PKG_NAME + ";\n");
  51     records.add("\n");
  52     records.add("import java.util.*;\n");
  53     records.add("\n");
  54     records.add("public class " + CLASS_NAME + " {\n");
  55     records.add("    public static void main() {\n");
  56     records.add("        System.out.println(\"In humongous class \");\n");
  57     records.add("    }");
  58     records.add("\n");
  59 }
  60 
  61 public static void addIteration(int itNum, List<String> records) {

  62     records.add("    public static Object public_static_object_" + itNum
  63             + " = new Object();\n");
  64     records.add("    protected static Object protected_static_object_" + itNum
  65             + " = new Object();\n");
  66     records.add("    private static Object private_static_Object_" + itNum
  67             + " = new Object();\n");
  68     records.add("\n");
  69     records.add("    public static long public_static_long_" + itNum + ";\n");
  70     records.add("    protected static long protected_static_long_" + itNum
  71             + " = new Random().nextLong();\n");
  72     records.add("    private static long private_static_long_" + itNum
  73             + " = 42;\n");
  74     records.add("\n");
  75     records.add("    public Object public_object_" + itNum
  76             + " = new Object();\n");
  77     records.add("    protected Object protected_object_" + itNum
  78             + " = new Object();\n");
  79     records.add("    private Object private_Object_" + itNum
  80             + " = new Object();\n");
  81     records.add("\n");
  82     records.add("    public long public_long_" + itNum + " = 43;\n");
  83     records.add("    protected long protected_long_" + itNum + " = 44;\n");
  84     records.add("    private long private_long_" + itNum
  85             + " = new Random().nextLong();\n");
  86 }
  87 public static void main(String[] args) throws Exception {
  88     if (args.length < 1) {
  89         System.out.println("Usage: HumongousTemplateClassGen "
  90                         + "<vm-testbase_src_folder>");
  91         return;
  92     }
  93 
  94     List<String> records = new ArrayList<String>(RECORD_COUNT);
  95     addFileTop(records);
  96     for (int i = 1; i < ITERATIONS; i++) {
  97         addIteration(i, records);
  98     }
  99     records.add("}");
 100     writeBuffered(records, (int) (MG * 1), args[0]);
 101 }
 102 
 103 private static void writeBuffered(List<String> records, int bufSize,
 104         String srcDir) throws IOException {
 105     String path = srcDir + File.separator + PKG_DIR_NAME + File.separator
 106             + CLASS_NAME + ".java";
 107     System.out.println("Path="+path);
 108     File file = new File (path);
 109     file.getParentFile().mkdirs();
 110     file.createNewFile();
 111     long start = System.currentTimeMillis();
 112     FileWriter writer = new FileWriter(file);
 113     BufferedWriter bufferedWriter = new BufferedWriter(writer, bufSize);
 114 
 115     for (String record: records) {
 116        bufferedWriter.write(record);
 117     }
 118     bufferedWriter.flush();
 119     bufferedWriter.close();
 120     long end = System.currentTimeMillis();
 121     System.out.println((end - start) / 1000f + " seconds");
 122 }
 123 }
--- EOF ---