1/*
2 * Copyright (c) 2013, 2016, 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 * @test SanityTest
26 * @summary Sanity check of String.intern() & GC
27 * @modules java.base/jdk.internal.misc
28 * @library /test/lib
29 * @build sun.hotspot.WhiteBox
30 * @run main ClassFileInstaller sun.hotspot.WhiteBox
31 *                              sun.hotspot.WhiteBox$WhiteBoxPermission
32 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI SanityTest
33 */
34
35import java.util.*;
36import sun.hotspot.WhiteBox;
37
38
39public class SanityTest {
40    public static Object tmp;
41    public static void main(String... args) {
42
43        WhiteBox wb = WhiteBox.getWhiteBox();
44        StringBuilder sb = new StringBuilder();
45        sb.append("1234x"); sb.append("x56789");
46        String str = sb.toString();
47
48        if (wb.isInStringTable(str)) {
49            throw new RuntimeException("String " + str + " is already interned");
50        }
51        str.intern();
52        if (!wb.isInStringTable(str)) {
53            throw new RuntimeException("String " + str + " is not interned");
54        }
55        str = sb.toString();
56        wb.fullGC();
57        if (wb.isInStringTable(str)) {
58            throw new RuntimeException("String " + str + " is in StringTable even after GC");
59        }
60    }
61}
62