1 /* 2 * Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.graalvm.compiler.hotspot.nodes; 24 25 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_2; 26 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1; 27 28 import org.graalvm.compiler.core.common.type.StampFactory; 29 import org.graalvm.compiler.graph.NodeClass; 30 import org.graalvm.compiler.hotspot.HotSpotLIRGenerator; 31 import org.graalvm.compiler.lir.VirtualStackSlot; 32 import org.graalvm.compiler.nodeinfo.NodeInfo; 33 import org.graalvm.compiler.nodes.FixedWithNextNode; 34 import org.graalvm.compiler.nodes.spi.LIRLowerable; 35 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; 36 import org.graalvm.compiler.word.Word; 37 import org.graalvm.compiler.word.WordTypes; 38 39 import jdk.vm.ci.meta.Value; 40 41 /** 42 * Intrinsic for getting the lock in the current {@linkplain BeginLockScopeNode lock scope}. 43 */ 44 @NodeInfo(cycles = CYCLES_2, size = SIZE_1) 45 public final class CurrentLockNode extends FixedWithNextNode implements LIRLowerable { 46 public static final NodeClass<CurrentLockNode> TYPE = NodeClass.create(CurrentLockNode.class); 47 48 protected int lockDepth; 49 50 public CurrentLockNode(@InjectedNodeParameter WordTypes wordTypes, int lockDepth) { 51 super(TYPE, StampFactory.forKind(wordTypes.getWordKind())); 52 this.lockDepth = lockDepth; 53 } 54 55 @Override 56 public void generate(NodeLIRBuilderTool gen) { 57 assert lockDepth != -1; 58 HotSpotLIRGenerator hsGen = (HotSpotLIRGenerator) gen.getLIRGeneratorTool(); 59 VirtualStackSlot slot = hsGen.getLockSlot(lockDepth); 60 // The register allocator cannot handle stack -> register moves so we use an LEA here 61 Value result = gen.getLIRGeneratorTool().emitAddress(slot); 62 gen.setResult(this, result); 63 } 64 65 @NodeIntrinsic 66 public static native Word currentLock(@ConstantNodeParameter int lockDepth); 67 }