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annotate test/compiler/testlibrary/rtm/XAbortProvoker.java @ 20304:a22acf6d7598

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8048112: G1 Full GC needs to support the case when the very first region is not available Summary: Refactor preparation for compaction during Full GC so that it lazily initializes the first compaction point. This also avoids problems later when the first region may not be committed. Also reviewed by K. Barrett. Reviewed-by: brutisso
author tschatzl
date Mon, 21 Jul 2014 10:00:31 +0200
parents 665bbe93823f
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 import com.oracle.java.testlibrary.Utils;
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28 import sun.misc.Unsafe;
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29
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30 /**
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31 * Current RTM locking implementation force transaction abort
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32 * before native method call by explicit xabort(0) call.
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33 */
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34 class XAbortProvoker extends AbortProvoker {
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35 // Following field have to be static in order to avoid escape analysis.
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36 @SuppressWarnings("UnsuedDeclaration")
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37 private static int field = 0;
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38 private static final Unsafe UNSAFE = Utils.getUnsafe();
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39
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40 public XAbortProvoker() {
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41 this(new Object());
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42 }
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43
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44 public XAbortProvoker(Object monitor) {
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45 super(monitor);
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46 }
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47
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48 @Override
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49 public void forceAbort() {
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50 synchronized(monitor) {
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51 XAbortProvoker.field = UNSAFE.addressSize();
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52 }
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53 }
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54
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55 @Override
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56 public String[] getMethodsToCompileNames() {
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57 return new String[] {
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58 getMethodWithLockName(),
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59 Unsafe.class.getName() + "::addressSize"
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60 };
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61 }
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62 }