1 /*

     2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 /**

    25  * @test

    26  * @bug 8218227

    27  * @summary StringBuilder/StringBuffer constructor throws confusing

    28  *          NegativeArraySizeException

    29  * @requires os.maxMemory >= 6G

    30  * @run main/othervm -Xms5G -Xmx5G HugeCapacity

    31  * @ignore This test has huge memory requirements

    32  */

    33 

    34 public class HugeCapacity {

    35     private static int failures = 0;

    36 

    37     public static void main(String[] args) {

    38         testHugeInitialString();

    39         testHugeInitialCharSequence();

    40         if (failures > 0) {

    41             throw new RuntimeException(failures + " tests failed");

    42         }

    43     }

    44 

    45     private static void testHugeInitialString() {

    46         try {

    47             String str = "Z".repeat(Integer.MAX_VALUE - 8);

    48             StringBuffer sb = new StringBuffer(str);

    49         } catch (OutOfMemoryError ignore) {

    50         } catch (Throwable unexpected) {

    51             unexpected.printStackTrace();

    52             failures++;

    53         }

    54     }

    55 

    56     private static void testHugeInitialCharSequence() {

    57         try {

    58             CharSequence seq = new MyHugeCharSeq();

    59             StringBuffer sb = new StringBuffer(seq);

    60         } catch (OutOfMemoryError ignore) {

    61         } catch (Throwable unexpected) {

    62             unexpected.printStackTrace();

    63             failures++;

    64         }

    65     }

    66 

    67     private static class MyHugeCharSeq implements CharSequence {

    68         public char charAt(int i) {

    69             throw new UnsupportedOperationException();

    70         }

    71         public int length() { return Integer.MAX_VALUE; }

    72         public CharSequence subSequence(int st, int e) {

    73             throw new UnsupportedOperationException();

    74         }

    75         public String toString() { return ""; }

    76     }

    77 }