/* * Copyright (c) 2012, 2015, 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 org.graalvm.compiler.hotspot.nodes; import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_2; import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1; import org.graalvm.compiler.core.common.type.StampFactory; import org.graalvm.compiler.graph.NodeClass; import org.graalvm.compiler.hotspot.HotSpotLIRGenerator; import org.graalvm.compiler.lir.VirtualStackSlot; import org.graalvm.compiler.nodeinfo.NodeInfo; import org.graalvm.compiler.nodes.FixedWithNextNode; import org.graalvm.compiler.nodes.spi.LIRLowerable; import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; import org.graalvm.compiler.word.Word; import org.graalvm.compiler.word.WordTypes; import jdk.vm.ci.meta.Value; /** * Intrinsic for getting the lock in the current {@linkplain BeginLockScopeNode lock scope}. */ @NodeInfo(cycles = CYCLES_2, size = SIZE_1) public final class CurrentLockNode extends FixedWithNextNode implements LIRLowerable { public static final NodeClass<CurrentLockNode> TYPE = NodeClass.create(CurrentLockNode.class); protected int lockDepth; public CurrentLockNode(@InjectedNodeParameter WordTypes wordTypes, int lockDepth) { super(TYPE, StampFactory.forKind(wordTypes.getWordKind())); this.lockDepth = lockDepth; } @Override public void generate(NodeLIRBuilderTool gen) { assert lockDepth != -1; HotSpotLIRGenerator hsGen = (HotSpotLIRGenerator) gen.getLIRGeneratorTool(); VirtualStackSlot slot = hsGen.getLockSlot(lockDepth); // The register allocator cannot handle stack -> register moves so we use an LEA here Value result = gen.getLIRGeneratorTool().emitAddress(slot); gen.setResult(this, result); } @NodeIntrinsic public static native Word currentLock(@ConstantNodeParameter int lockDepth); }