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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/nodes/CurrentJavaThreadNode.java @ 14841:47e4d2e01c6e
Split LIRGenerator and fix AMD64 backend.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Wed, 26 Mar 2014 11:49:07 +0100 |
parents | 1cf373d2b415 |
children | ba13350ee179 |
rev | line source |
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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.word.*; |
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33 |
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34 /** |
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35 * Gets the address of the C++ JavaThread object for the current thread. |
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36 */ |
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37 public final class CurrentJavaThreadNode extends FloatingNode implements LIRLowerable { |
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38 |
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39 private CurrentJavaThreadNode() { |
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40 super(null); |
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41 } |
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42 |
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43 @Override |
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44 public void generate(NodeLIRGeneratorTool gen) { |
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45 Register rawThread = ((HotSpotLIRGenerator) gen).getProviders().getRegisters().getThreadRegister(); |
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46 gen.setResult(this, rawThread.asValue(this.getKind())); |
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47 } |
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48 |
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49 private static int eetopOffset() { |
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50 try { |
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51 return (int) UnsafeAccess.unsafe.objectFieldOffset(Thread.class.getDeclaredField("eetop")); |
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52 } catch (Exception e) { |
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53 throw new GraalInternalError(e); |
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54 } |
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55 } |
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56 |
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57 @NodeIntrinsic(setStampFromReturnType = true) |
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58 public static Word get() { |
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59 return Word.unsigned(unsafeReadWord(Thread.currentThread(), eetopOffset())); |
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60 } |
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61 } |