122 lines
5.0 KiB
Java
122 lines
5.0 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 org.junit.jupiter.api.Test;
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import static org.junit.jupiter.api.Assertions.*;
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import java.nio.charset.StandardCharsets;
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/*
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* @test
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* @bug 8077559 8321180
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* @summary Tests Compact String for maximum size strings
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* @requires os.maxMemory >= 8g & vm.bits == 64
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* @requires vm.flagless
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* @run junit/othervm -XX:+CompactStrings -Xmx8g MaxSizeUTF16String
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* @run junit/othervm -XX:-CompactStrings -Xmx8g MaxSizeUTF16String
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* @run junit/othervm -Xcomp -Xmx8g MaxSizeUTF16String
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*/
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public class MaxSizeUTF16String {
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private final static int MAX_UTF16_STRING_LENGTH = Integer.MAX_VALUE / 2;
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private final static String EXPECTED_OOME_MESSAGE = "UTF16 String size is";
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private final static String EXPECTED_VM_LIMIT_MESSAGE = "Requested array size exceeds VM limit";
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private final static String UNEXPECTED_JAVA_HEAP_SPACE = "Java heap space";
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// Create a large UTF-8 byte array with a single non-latin1 character
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private static byte[] generateUTF8Data(int byteSize) {
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byte[] nonAscii = "\u0100".getBytes(StandardCharsets.UTF_8);
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byte[] arr = new byte[byteSize];
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System.arraycopy(nonAscii, 0, arr, 0, nonAscii.length); // non-latin1 at start
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return arr;
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}
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// Create a large char array with a single non-latin1 character
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private static char[] generateCharData(int size) {
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char[] nonAscii = "\u0100".toCharArray();
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char[] arr = new char[size];
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System.arraycopy(nonAscii, 0, arr, 0, nonAscii.length); // non-latin1 at start
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return arr;
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}
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@Test
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public void testMaxUTF8() {
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// Overly large UTF-8 data with 1 non-latin1 char
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final byte[] large_utf8_bytes = generateUTF8Data(MAX_UTF16_STRING_LENGTH + 1);
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int[] sizes = new int[] {
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MAX_UTF16_STRING_LENGTH + 1,
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MAX_UTF16_STRING_LENGTH,
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MAX_UTF16_STRING_LENGTH - 1};
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for (int size : sizes) {
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System.err.println("Checking max UTF16 string len: " + size);
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try {
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// Use only part of the UTF-8 byte array
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new String(large_utf8_bytes, 0, size, StandardCharsets.UTF_8);
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if (size >= MAX_UTF16_STRING_LENGTH) {
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fail("Expected OutOfMemoryError with message prefix: " + EXPECTED_OOME_MESSAGE);
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}
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} catch (OutOfMemoryError ex) {
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if (ex.getMessage().equals(UNEXPECTED_JAVA_HEAP_SPACE)) {
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// Insufficient heap size
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throw ex;
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}
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if (!ex.getMessage().startsWith(EXPECTED_OOME_MESSAGE) &&
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!ex.getMessage().startsWith(EXPECTED_VM_LIMIT_MESSAGE)) {
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fail("Failed: Not the OutOfMemoryError expected", ex);
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}
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}
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}
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}
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@Test
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public void testMaxCharArray() {
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// Overly large UTF-8 data with 1 non-latin1 char
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final char[] large_char_array = generateCharData(MAX_UTF16_STRING_LENGTH + 1);
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int[] sizes = new int[]{
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MAX_UTF16_STRING_LENGTH + 1,
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MAX_UTF16_STRING_LENGTH,
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MAX_UTF16_STRING_LENGTH - 1};
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for (int size : sizes) {
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System.err.println("Checking max UTF16 string len: " + size);
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try {
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// Large char array with 1 non-latin1 char
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new String(large_char_array, 0, size);
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if (size >= MAX_UTF16_STRING_LENGTH) {
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fail("Expected OutOfMemoryError with message prefix: " + EXPECTED_OOME_MESSAGE);
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}
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} catch (OutOfMemoryError ex) {
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if (ex.getMessage().equals(UNEXPECTED_JAVA_HEAP_SPACE)) {
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// Insufficient heap size
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throw ex;
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}
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if (!ex.getMessage().startsWith(EXPECTED_OOME_MESSAGE) &&
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!ex.getMessage().startsWith(EXPECTED_VM_LIMIT_MESSAGE)) {
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throw new RuntimeException("Wrong exception message: " + ex.getMessage(), ex);
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}
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}
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}
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}
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}
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