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test/jdk/java/io/ByteArrayOutputStream/MaxCapacity.java

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   1 /*
   2  * Copyright (c) 2014 Google Inc. 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  * @ignore This test has huge memory requirements
  27  * @run main/timeout=1800/othervm -Xmx8g MaxCapacity
  28  * @bug 8055949
  29  * @summary Check that we can write (almost) Integer.MAX_VALUE bytes
  30  *          to a ByteArrayOutputStream.


  31  * @author Martin Buchholz
  32  */
  33 import java.io.ByteArrayOutputStream;
  34 
  35 public class MaxCapacity {
  36     public static void main(String[] args) {
  37         long maxHeap = Runtime.getRuntime().maxMemory();
  38         if (maxHeap < 3L * Integer.MAX_VALUE) {
  39             System.out.printf("Skipping test; max memory %sM too small%n",
  40                               maxHeap/(1024*1024));
  41             return;
  42         }
  43         ByteArrayOutputStream baos = new ByteArrayOutputStream();
  44         for (long n = 0; ; n++) {
  45             try {
  46                 baos.write((byte)'x');
  47             } catch (Throwable t) {
  48                 // check data integrity while we're here
  49                 byte[] bytes = baos.toByteArray();
  50                 if (bytes.length != n)
   1 /*
   2  * Copyright (c) 2014, Google Inc. All rights reserved.
   3  * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  */
  24 
  25 /*
  26  * @test


  27  * @bug 8055949
  28  * @summary Check that we can write (almost) Integer.MAX_VALUE bytes
  29  *          to a ByteArrayOutputStream.
  30  * @requires (sun.arch.data.model == "64" & os.maxMemory >= 10g)
  31  * @run main/timeout=1800/othervm -Xmx8g MaxCapacity
  32  * @author Martin Buchholz
  33  */
  34 import java.io.ByteArrayOutputStream;
  35 
  36 public class MaxCapacity {
  37     public static void main(String[] args) {
  38         long maxHeap = Runtime.getRuntime().maxMemory();
  39         if (maxHeap < 3L * Integer.MAX_VALUE) {
  40             System.out.printf("Skipping test; max memory %sM too small%n",
  41                               maxHeap/(1024*1024));
  42             return;
  43         }
  44         ByteArrayOutputStream baos = new ByteArrayOutputStream();
  45         for (long n = 0; ; n++) {
  46             try {
  47                 baos.write((byte)'x');
  48             } catch (Throwable t) {
  49                 // check data integrity while we're here
  50                 byte[] bytes = baos.toByteArray();
  51                 if (bytes.length != n)
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