61 lines
2.2 KiB
Java
61 lines
2.2 KiB
Java
/*
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* Copyright (c) 2013, 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test SanityTest
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* @summary Sanity check of String.intern() & GC
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* @modules java.base/jdk.internal.misc
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* @library /test/lib
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* @build jdk.test.whitebox.WhiteBox
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI SanityTest
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*/
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import java.util.*;
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import jdk.test.whitebox.WhiteBox;
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public class SanityTest {
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public static Object tmp;
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public static void main(String... args) {
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WhiteBox wb = WhiteBox.getWhiteBox();
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StringBuilder sb = new StringBuilder();
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sb.append("1234x"); sb.append("x56789");
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String str = sb.toString();
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if (wb.isInStringTable(str)) {
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throw new RuntimeException("String " + str + " is already interned");
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}
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str.intern();
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if (!wb.isInStringTable(str)) {
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throw new RuntimeException("String " + str + " is not interned");
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}
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str = sb.toString();
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wb.fullGC();
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if (wb.isInStringTable(str)) {
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throw new RuntimeException("String " + str + " is in StringTable even after GC");
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}
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}
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}
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