--- /dev/null 2017-05-05 06:40:48.273288351 -0700 +++ new/test/hotspot/jtreg/runtime/appcds/javaldr/GCSharedStringsDuringDumpWb.java 2017-11-27 12:13:40.832934938 -0800 @@ -0,0 +1,45 @@ +/* + * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + * + */ + +import sun.hotspot.WhiteBox; + +public class GCSharedStringsDuringDumpWb { + public static void main(String[] args) throws Exception { + WhiteBox wb = WhiteBox.getWhiteBox(); + String s = "shared_test_string_unique_14325"; + s = s.intern(); + CheckString(wb, s); + for (int i=0; i<100000; i++) { + s = "generated_string " + i; + s = s.intern(); + CheckString(wb, s); + } + } + + public static void CheckString(WhiteBox wb, String s) { + if (!wb.areSharedStringsIgnored() && !wb.isShared(s)) { + throw new RuntimeException("String is not shared."); + } + } +}