112 lines
3.8 KiB
Java
112 lines
3.8 KiB
Java
/*
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* Copyright (c) 2016, 2024, 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 jdk.internal.util.ArraysSupport;
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/**
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* @test
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* @bug 8149330 8218227
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* @summary Capacity should not get close to Integer.MAX_VALUE unless
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* necessary
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* @modules java.base/jdk.internal.util
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* @requires (sun.arch.data.model == "64" & os.maxMemory >= 8G)
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* @run main/othervm -Xms6G -Xmx6G -XX:+CompactStrings HugeCapacity true
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* @run main/othervm -Xms6G -Xmx6G -XX:-CompactStrings HugeCapacity false
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*/
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public class HugeCapacity {
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private static int failures = 0;
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public static void main(String[] args) {
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if (args.length == 0) {
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throw new IllegalArgumentException("Need the argument");
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}
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boolean isCompact = Boolean.parseBoolean(args[0]);
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testLatin1(isCompact);
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testUtf16();
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testHugeInitialString();
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testHugeInitialCharSequence();
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if (failures > 0) {
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throw new RuntimeException(failures + " tests failed");
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}
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}
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private static void testLatin1(boolean isCompact) {
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try {
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int divisor = isCompact ? 2 : 4;
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StringBuilder sb = new StringBuilder();
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sb.ensureCapacity(Integer.MAX_VALUE / divisor);
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sb.ensureCapacity(Integer.MAX_VALUE / divisor + 1);
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} catch (OutOfMemoryError oom) {
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oom.printStackTrace();
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failures++;
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}
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}
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private static void testUtf16() {
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try {
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StringBuilder sb = new StringBuilder();
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sb.append('\u042b');
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sb.ensureCapacity(Integer.MAX_VALUE / 4);
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sb.ensureCapacity(Integer.MAX_VALUE / 4 + 1);
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} catch (OutOfMemoryError oom) {
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oom.printStackTrace();
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failures++;
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}
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}
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private static void testHugeInitialString() {
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try {
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String str = "Z".repeat(ArraysSupport.SOFT_MAX_ARRAY_LENGTH);
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StringBuilder sb = new StringBuilder(str);
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} catch (OutOfMemoryError ignore) {
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} catch (Throwable unexpected) {
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unexpected.printStackTrace();
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failures++;
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}
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}
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private static void testHugeInitialCharSequence() {
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try {
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CharSequence seq = new MyHugeCharSeq();
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StringBuilder sb = new StringBuilder(seq);
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} catch (OutOfMemoryError ignore) {
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} catch (Throwable unexpected) {
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unexpected.printStackTrace();
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failures++;
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}
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}
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private static class MyHugeCharSeq implements CharSequence {
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public char charAt(int i) {
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throw new UnsupportedOperationException();
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}
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public int length() { return Integer.MAX_VALUE; }
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public CharSequence subSequence(int st, int e) {
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throw new UnsupportedOperationException();
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}
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public String toString() { return ""; }
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}
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}
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