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 }