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 24import sun.hotspot.WhiteBox; 25 26// This class is used by the test SharedStrings.java 27// It should be launched in CDS mode 28public 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 // Check that it's a valid string 42 if (s.getClass() != String.class || !(s instanceof String)) { 43 throw new RuntimeException("Shared string is not a valid String: FAIL"); 44 } 45 46 if (wb.isShared(internedS)) { 47 System.out.println("Found shared string, result: PASS"); 48 } else { 49 throw new RuntimeException("String is not shared, result: FAIL"); 50 } 51 } 52} 53 54 55