| /* |
| * Copyright (c) 2012, 2016, 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.InputType.Memory; |
| 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.extended.MonitorEnter; |
| import org.graalvm.compiler.nodes.memory.AbstractMemoryCheckpoint; |
| import org.graalvm.compiler.nodes.memory.MemoryCheckpoint; |
| 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 org.graalvm.word.LocationIdentity; |
| |
| import jdk.vm.ci.meta.JavaKind; |
| import jdk.vm.ci.meta.Value; |
| |
| /** |
| * Intrinsic for opening a scope binding a stack-based lock with an object. A lock scope must be |
| * closed with an {@link EndLockScopeNode}. The frame state after this node denotes that the object |
| * is locked (ensuring the GC sees and updates the object) so it must come after any null pointer |
| * check on the object. |
| */ |
| @NodeInfo(allowedUsageTypes = Memory, cycles = CYCLES_2, size = SIZE_1) |
| public final class BeginLockScopeNode extends AbstractMemoryCheckpoint implements LIRLowerable, MonitorEnter, MemoryCheckpoint.Single { |
| |
| public static final NodeClass<BeginLockScopeNode> TYPE = NodeClass.create(BeginLockScopeNode.class); |
| protected int lockDepth; |
| |
| public BeginLockScopeNode(@InjectedNodeParameter WordTypes wordTypes, int lockDepth) { |
| super(TYPE, StampFactory.forKind(wordTypes.getWordKind())); |
| this.lockDepth = lockDepth; |
| } |
| |
| public BeginLockScopeNode(JavaKind kind, int lockDepth) { |
| super(TYPE, StampFactory.forKind(kind)); |
| this.lockDepth = lockDepth; |
| } |
| |
| @Override |
| public boolean hasSideEffect() { |
| return false; |
| } |
| |
| @Override |
| public LocationIdentity getLocationIdentity() { |
| return LocationIdentity.any(); |
| } |
| |
| @Override |
| public void generate(NodeLIRBuilderTool gen) { |
| assert lockDepth != -1; |
| HotSpotLIRGenerator hsGen = (HotSpotLIRGenerator) gen.getLIRGeneratorTool(); |
| VirtualStackSlot slot = hsGen.getLockSlot(lockDepth); |
| Value result = gen.getLIRGeneratorTool().emitAddress(slot); |
| gen.setResult(this, result); |
| } |
| |
| @NodeIntrinsic |
| public static native Word beginLockScope(@ConstantNodeParameter int lockDepth); |
| } |