russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
78 lines
2.9 KiB
Java
78 lines
2.9 KiB
Java
/*
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* Copyright (c) 2025, 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
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* @bug 8356152
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* @summary Check that huge concatenations throw OutOfMemoryError
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* @requires os.maxMemory > 8G
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* @run junit/othervm -Xmx8G -XX:+CompactStrings -Dcompact=true HugeConcatTest
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* @run junit/othervm -Xmx8G -XX:-CompactStrings -Dcompact=false HugeConcatTest
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*/
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import org.junit.jupiter.api.BeforeAll;
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import org.junit.jupiter.api.Test;
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import static org.junit.Assert.assertThrows;
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public class HugeConcatTest {
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private static final int HUGE_LENGTH_UTF16 = Integer.MAX_VALUE / 2 - 2;
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private static String hugeLatin1;
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private static final String hugeUTF16 = "\u20AC".repeat(HUGE_LENGTH_UTF16);
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@BeforeAll
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public static void initHugeLatin1() {
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String compact = System.getProperty("compact", "true");
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int hugeLatin1Length = Boolean.parseBoolean(compact)
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? Integer.MAX_VALUE - 2
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: HUGE_LENGTH_UTF16;
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hugeLatin1 = "a".repeat(hugeLatin1Length);
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}
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@Test
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public void testConcat_Latin1_Latin1() {
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assertThrows(OutOfMemoryError.class, () -> { var s = hugeLatin1 + hugeLatin1; });
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assertThrows(OutOfMemoryError.class, () -> hugeLatin1.concat(hugeLatin1));
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}
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@Test
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public void testConcat_Latin1_UTF16() {
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assertThrows(OutOfMemoryError.class, () -> { var s = hugeLatin1 + hugeUTF16; });
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assertThrows(OutOfMemoryError.class, () -> hugeLatin1.concat(hugeUTF16));
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}
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@Test
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public void testConcat_UTF16_Latin1() {
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assertThrows(OutOfMemoryError.class, () -> { var s = hugeUTF16 + hugeLatin1; });
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assertThrows(OutOfMemoryError.class, () -> hugeUTF16.concat(hugeLatin1));
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}
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@Test
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public void testConcat_UTF16_UTF16() {
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assertThrows(OutOfMemoryError.class, () -> { var s = hugeUTF16 + hugeUTF16; });
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assertThrows(OutOfMemoryError.class, () -> hugeUTF16.concat(hugeUTF16));
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}
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}
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