1 /*
   2  * Copyright (c) 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 package cdsutils;
  26 
  27 import java.io.BufferedReader;
  28 import java.io.File;
  29 import java.io.FileReader;
  30 
  31 /**
  32  * This class is used to simulate -Xshare:dump with -XX:ArchiveClassesAtExit.
  33  * It loads all classes specified in a classlist file. See patchJarForDynamicDump()
  34  * in ../TestCommon.java for details.
  35  */
  36 public class DynamicDumpHelper {
  37     public static void main(String args[]) throws Throwable {
  38         File file = new File(args[0]);
  39 
  40         System.out.println("Loading classes to share...");
  41         try (BufferedReader br = new BufferedReader(new FileReader(file))) {
  42             String line;
  43             while ((line = br.readLine()) != null) {
  44                 //System.out.println("Loading class: " + line);
  45                 line = line.replace('/', '.');
  46                 try {
  47                     Class.forName(line);
  48                 } catch (java.lang.ClassNotFoundException ex) {
  49                     try {
  50                         Class.forName(line, true, null);
  51                     } catch (java.lang.ClassNotFoundException cnfe) {
  52                         System.out.println("Preload Warning: Cannot find " + line.replace('.', '/'));
  53                     }
  54                 } catch (Throwable t) {
  55                     System.out.println("Error: failed to load \"" + line + "\": " + t);
  56                 }
  57             }
  58         }
  59         System.out.println("Loading classes to share: done.");
  60     }
  61 }