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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/nodes/CurrentJavaThreadNode.java @ 8477:abf5a4554bae

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made CurrentJavaThreadNode.get() interpretable
author Doug Simon <doug.simon@oracle.com>
date Tue, 26 Mar 2013 12:48:44 +0100
parents 7a9cb4448968
children 261a43921c5e
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1 /*
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2 * Copyright (c) 2012, 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
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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 package com.oracle.graal.hotspot.nodes;
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24
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25 import static com.oracle.graal.hotspot.HotSpotGraalRuntime.*;
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26
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27 import com.oracle.graal.api.code.*;
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28 import com.oracle.graal.graph.*;
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29 import com.oracle.graal.hotspot.*;
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30 import com.oracle.graal.nodes.calc.*;
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31 import com.oracle.graal.nodes.spi.*;
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32 import com.oracle.graal.nodes.type.*;
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33 import com.oracle.graal.word.*;
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34
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35 /**
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36 * Gets the address of the C++ JavaThread object for the current thread.
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37 */
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38 public class CurrentJavaThreadNode extends FloatingNode implements LIRLowerable {
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39
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40 public CurrentJavaThreadNode() {
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41 super(StampFactory.forWord());
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42 }
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43
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44 @Override
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45 public void generate(LIRGeneratorTool gen) {
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46 Register rawThread = HotSpotGraalRuntime.getInstance().getRuntime().threadRegister();
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47 gen.setResult(this, rawThread.asValue(this.kind()));
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48 }
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49
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50 private static int eetopOffset() {
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51 try {
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52 return (int) UnsafeAccess.unsafe.objectFieldOffset(Thread.class.getDeclaredField("eetop"));
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53 } catch (Exception e) {
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54 throw new GraalInternalError(e);
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55 }
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56 }
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57
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58 @NodeIntrinsic
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59 public static Word get() {
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60 return Word.box(unsafeReadWord(Thread.currentThread(), eetopOffset()));
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61 }
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62 }