author | igerasim |
Tue, 05 Feb 2019 17:05:40 -0800 | |
changeset 53653 | 868611f0adc3 |
parent 47216 | 71c04702a3d5 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2016, 2019, 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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/** |
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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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* @requires os.maxMemory >= 6G |
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* @run main/othervm -Xms5G -Xmx5G HugeCapacity |
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* @ignore This test has huge memory requirements |
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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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testLatin1(); |
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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() { |
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try { |
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StringBuilder sb = new StringBuilder(); |
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sb.ensureCapacity(Integer.MAX_VALUE / 2); |
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sb.ensureCapacity(Integer.MAX_VALUE / 2 + 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(Integer.MAX_VALUE - 8); |
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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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} |