Mercurial > hg > graal-compiler
diff test/runtime/interned/SanityTest.java @ 8850: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
author | mgerdin |
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date | Tue, 02 Apr 2013 11:28:33 +0200 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/runtime/interned/SanityTest.java Tue Apr 02 11:28:33 2013 +0200 @@ -0,0 +1,59 @@ +/* + * Copyright (c) 2013, 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. + */ + +/* + * @test SanityTest + * @summary Sanity check of String.intern() & GC + * @library /testlibrary /testlibrary/whitebox + * @build SanityTest + * @run main ClassFileInstaller sun.hotspot.WhiteBox + * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI SanityTest + */ + +import java.util.*; +import sun.hotspot.WhiteBox; + + +public class SanityTest { + public static Object tmp; + public static void main(String... args) { + + WhiteBox wb = WhiteBox.getWhiteBox(); + StringBuilder sb = new StringBuilder(); + sb.append("1234x"); sb.append("x56789"); + String str = sb.toString(); + + if (wb.isInStringTable(str)) { + throw new RuntimeException("String " + str + " is already interned"); + } + str.intern(); + if (!wb.isInStringTable(str)) { + throw new RuntimeException("String " + str + " is not interned"); + } + str = sb.toString(); + wb.fullGC(); + if (wb.isInStringTable(str)) { + throw new RuntimeException("String " + str + " is in StringTable even after GC"); + } + } +}