76 lines
2.7 KiB
Java
76 lines
2.7 KiB
Java
/*
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* Copyright (c) 2023, 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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import java.io.IOException;
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import java.nio.charset.StandardCharsets;
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/*
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* @test
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* @bug 8077559
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* @summary Tests Compact String for negative size.
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* @requires vm.bits == 64 & os.maxMemory >= 4G
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* @run main/othervm -XX:+CompactStrings -Xmx4g NegativeSize
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* @run main/othervm -XX:-CompactStrings -Xmx4g NegativeSize
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*/
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// In Java8: java.lang.OutOfMemoryError: Java heap space
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// In Java9+: was java.lang.NegativeArraySizeException: -1894967266
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public class NegativeSize {
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static byte[] generateData() {
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int asciisize = 1_200_000_000;
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byte[] nonAscii = "非アスキー".getBytes();
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int nonAsciiSize = nonAscii.length;
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// 1 GB
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byte[] arr = new byte[asciisize + nonAsciiSize];
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for (int i=0; i<asciisize; ++i) {
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arr[i] = (byte)('0' + (i % 40));
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}
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for(int i=0; i<nonAsciiSize; ++i) {
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arr[i + asciisize] = nonAscii[i];
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}
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return arr;
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}
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public static void main(String[] args) throws IOException {
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try {
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byte[] largeBytes = generateData();
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String inStr = new String(largeBytes, StandardCharsets.UTF_8);
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System.out.println(inStr.length());
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System.out.println(inStr.substring(1_200_000_000));
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} catch (OutOfMemoryError ex) {
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if (ex.getMessage().startsWith("UTF16 String size is")) {
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System.out.println("Succeeded with OutOfMemoryError");
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} else {
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throw new RuntimeException("Failed: Not the OutOfMemoryError expected", ex);
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}
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} catch (NegativeArraySizeException ex) {
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throw new RuntimeException("Failed: Expected OutOfMemoryError", ex);
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}
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}
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}
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