1 /*
   2  * Copyright (c) 2013, 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 import sun.hotspot.WhiteBox;
  25 
  26 // This class is used by the test SharedStrings.java
  27 // It should be launched in CDS mode
  28 public class SharedStringsWb {
  29     public static void main(String[] args) throws Exception {
  30         WhiteBox wb = WhiteBox.getWhiteBox();
  31 
  32         if (wb.areSharedStringsIgnored()) {
  33             System.out.println("Shared strings are ignored, assuming PASS");
  34             return;
  35         }
  36 
  37         // The string below is known to be added to CDS archive
  38         String s = "<init>";
  39         String internedS = s.intern();
  40 
  41         if (wb.isShared(internedS)) {
  42             System.out.println("Found shared string, result: PASS");
  43         } else {
  44             throw new RuntimeException("String is not shared, result: FAIL");
  45         }
  46     }
  47 }
  48 
  49