Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/nodes/CurrentJavaThreadNode.java @ 12456:f87c68d79f07
improved support for co-existing, multiple backends (GRAAL-363)
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 17 Oct 2013 01:08:17 +0200 |
parents | 7080a96be216 |
children | 9b62c748c9ae |
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/* * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.graal.hotspot.nodes; import static com.oracle.graal.hotspot.HotSpotGraalRuntime.*; import com.oracle.graal.api.code.*; import com.oracle.graal.graph.*; import com.oracle.graal.nodes.calc.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.word.*; /** * Gets the address of the C++ JavaThread object for the current thread. */ public final class CurrentJavaThreadNode extends FloatingNode implements LIRLowerable { private CurrentJavaThreadNode() { super(null); } @Override public void generate(LIRGeneratorTool gen) { Register rawThread = runtime().getHostProviders().getRegisters().getThreadRegister(); gen.setResult(this, rawThread.asValue(this.kind())); } private static int eetopOffset() { try { return (int) UnsafeAccess.unsafe.objectFieldOffset(Thread.class.getDeclaredField("eetop")); } catch (Exception e) { throw new GraalInternalError(e); } } @NodeIntrinsic(setStampFromReturnType = true) public static Word get() { return Word.unsigned(unsafeReadWord(Thread.currentThread(), eetopOffset())); } }