1 /* 2 * Copyright (c) 2017, 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 import sun.hotspot.WhiteBox; 26 27 public class GCSharedStringsDuringDumpWb { 28 public static void main(String[] args) throws Exception { 29 WhiteBox wb = WhiteBox.getWhiteBox(); 30 String s = "shared_test_string_unique_14325"; 31 s = s.intern(); 32 CheckString(wb, s); 33 for (int i=0; i<100000; i++) { 34 s = "generated_string " + i; 35 s = s.intern(); 36 CheckString(wb, s); 37 } 38 } 39 40 public static void CheckString(WhiteBox wb, String s) { 41 if (!wb.areSharedStringsIgnored() && !wb.isShared(s)) { 42 throw new RuntimeException("String is not shared."); 43 } 44 } 45 }