737ae7742a
Use @requires os.maxMemory in order to run the test only if memory requirements are satisfied as opposed to ignoring it Reviewed-by: coffeys
67 lines
2.5 KiB
Java
67 lines
2.5 KiB
Java
/*
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* Copyright (c) 2014, Google Inc. All rights reserved.
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* Copyright (c) 2020, 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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* @test
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* @bug 8055949
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* @summary Check that we can write (almost) Integer.MAX_VALUE bytes
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* to a ByteArrayOutputStream.
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* @requires (sun.arch.data.model == "64" & os.maxMemory >= 10g)
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* @run main/timeout=1800/othervm -Xmx8g MaxCapacity
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* @author Martin Buchholz
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*/
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import java.io.ByteArrayOutputStream;
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public class MaxCapacity {
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public static void main(String[] args) {
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long maxHeap = Runtime.getRuntime().maxMemory();
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if (maxHeap < 3L * Integer.MAX_VALUE) {
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System.out.printf("Skipping test; max memory %sM too small%n",
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maxHeap/(1024*1024));
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return;
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}
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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for (long n = 0; ; n++) {
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try {
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baos.write((byte)'x');
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} catch (Throwable t) {
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// check data integrity while we're here
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byte[] bytes = baos.toByteArray();
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if (bytes.length != n)
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throw new AssertionError("wrong length");
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if (bytes[0] != 'x' ||
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bytes[bytes.length - 1] != 'x')
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throw new AssertionError("wrong contents");
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long gap = Integer.MAX_VALUE - n;
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System.out.printf("gap=%dM %d%n", gap/(1024*1024), gap);
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if (gap > 1024)
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throw t;
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// t.printStackTrace();
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break;
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}
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}
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}
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}
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