jdk8-mips64-public/hotspot: test/runtime/interned/SanityTest.java@ede380e13960

8009763: Add WB test for String.intern()
Summary: Add convenience method in StringTable, add WhiteBox method and simple sanity test
Reviewed-by: mgerdin, zgu
Contributed-by: leonid.mesnik@oracle.com

     1 /*

     2  * Copyright (c) 2013, 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  */

    24 /*

    25  * @test SanityTest

    26  * @summary Sanity check of String.intern() & GC

    27  * @library /testlibrary /testlibrary/whitebox

    28  * @build SanityTest

    29  * @run main ClassFileInstaller sun.hotspot.WhiteBox

    30  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI SanityTest

    31  */

    33 import java.util.*;

    34 import sun.hotspot.WhiteBox;

    37 public class SanityTest {

    38     public static Object tmp;

    39     public static void main(String... args) {

    41         WhiteBox wb = WhiteBox.getWhiteBox();

    42         StringBuilder sb = new StringBuilder();

    43         sb.append("1234x"); sb.append("x56789");

    44         String str = sb.toString();

    46         if (wb.isInStringTable(str)) {

    47             throw new RuntimeException("String " + str + " is already interned");

    48         }

    49         str.intern();

    50         if (!wb.isInStringTable(str)) {

    51             throw new RuntimeException("String " + str + " is not interned");

    52         }

    53         str = sb.toString();

    54         wb.fullGC();

    55         if (wb.isInStringTable(str)) {

    56             throw new RuntimeException("String " + str + " is in StringTable even after GC");

    57         }

    58     }

    59 }

Mercurial > jdk8-mips64-public > hotspot / file revision

test/runtime/interned/SanityTest.java@ede380e13960

test/runtime/interned/SanityTest.java