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annotate test/compiler/testlibrary/rtm/BufferOverflowProvoker.java @ 17871:665bbe93823f

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8039499: Add all common classes used by tests on RTM support to testlibrary Reviewed-by: kvn, iignatyev Contributed-by: filipp.zhinkin@oracle.com
author iignatyev
date Mon, 14 Apr 2014 19:29:34 +0400
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17871
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1 /*
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2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
665bbe93823f 8039499: Add all common classes used by tests on RTM support to testlibrary
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 package rtm;
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26
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27 /**
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28 * In order to provoke transactional execution abort due to
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29 * internal's buffer overflow BufferOverflowProvoker modifies
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30 * 1MB of BYTES during single transaction.
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31 */
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32 class BufferOverflowProvoker extends AbortProvoker {
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33 /**
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34 * To force buffer overflow abort we modify memory region with
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35 * size more then L1d cache size.
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36 */
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37 private static final int MORE_THAN_L1D_SIZE = 1024 * 1024;
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38 private static final byte[] DATA = new byte[MORE_THAN_L1D_SIZE];
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39
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40 @Override
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41 public void forceAbort() {
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42 synchronized(monitor) {
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43 for (int i = 0; i < BufferOverflowProvoker.DATA.length; i++) {
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44 BufferOverflowProvoker.DATA[i]++;
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45 }
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46 }
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47 }
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48 }