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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/nodes/CurrentJavaThreadNode.java @ 18998:ec0733b5a90a

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Allow final modifier on node subclasses and start adding the modifier to leaf classes.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Wed, 28 Jan 2015 02:34:14 +0100
parents f57d86eb036f
children 7e2c87dae93e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2012, 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
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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.api.meta.*;
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29 import com.oracle.graal.compiler.common.*;
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30 import com.oracle.graal.compiler.common.type.*;
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31 import com.oracle.graal.hotspot.*;
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32 import com.oracle.graal.nodeinfo.*;
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33 import com.oracle.graal.nodes.calc.*;
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34 import com.oracle.graal.nodes.spi.*;
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35 import com.oracle.graal.word.*;
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36
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37 /**
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38 * Gets the address of the C++ JavaThread object for the current thread.
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39 */
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40 @NodeInfo
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41 public final class CurrentJavaThreadNode extends FloatingNode implements LIRLowerable {
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42
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43 protected LIRKind wordKind;
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44
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45 public CurrentJavaThreadNode(Kind kind) {
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46 super(StampFactory.forKind(kind));
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47 this.wordKind = LIRKind.value(kind);
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48 }
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49
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50 @Override
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51 public void generate(NodeLIRBuilderTool gen) {
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52 Register rawThread = ((HotSpotLIRGenerator) gen.getLIRGeneratorTool()).getProviders().getRegisters().getThreadRegister();
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53 gen.setResult(this, rawThread.asValue(wordKind));
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54 }
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55
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56 private static int eetopOffset() {
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57 try {
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58 return (int) UnsafeAccess.unsafe.objectFieldOffset(Thread.class.getDeclaredField("eetop"));
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59 } catch (Exception e) {
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60 throw new GraalInternalError(e);
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61 }
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62 }
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63
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64 @NodeIntrinsic(setStampFromReturnType = true)
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65 public static Word get(@SuppressWarnings("unused") @ConstantNodeParameter Kind kind) {
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66 return Word.unsigned(unsafeReadWord(Thread.currentThread(), eetopOffset()));
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67 }
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68 }