1 /* 2 * Copyright (c) 2009, 2016, 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.nodes.java; 24 25 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_100; 26 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_100; 27 28 import org.graalvm.compiler.core.common.LocationIdentity; 29 import org.graalvm.compiler.graph.IterableNodeType; 30 import org.graalvm.compiler.graph.NodeClass; 31 import org.graalvm.compiler.nodeinfo.NodeInfo; 32 import org.graalvm.compiler.nodes.ValueNode; 33 import org.graalvm.compiler.nodes.extended.MonitorEnter; 34 import org.graalvm.compiler.nodes.memory.MemoryCheckpoint; 35 import org.graalvm.compiler.nodes.spi.Lowerable; 36 import org.graalvm.compiler.nodes.spi.LoweringTool; 37 import org.graalvm.compiler.nodes.spi.Virtualizable; 38 import org.graalvm.compiler.nodes.spi.VirtualizerTool; 39 import org.graalvm.compiler.nodes.virtual.VirtualObjectNode; 40 41 /** 42 * The {@code MonitorEnterNode} represents the acquisition of a monitor. 43 */ 44 @NodeInfo(cycles = CYCLES_100, size = SIZE_100) 45 public class MonitorEnterNode extends AccessMonitorNode implements Virtualizable, Lowerable, IterableNodeType, MonitorEnter, MemoryCheckpoint.Single { 46 47 public static final NodeClass<MonitorEnterNode> TYPE = NodeClass.create(MonitorEnterNode.class); 48 49 public MonitorEnterNode(ValueNode object, MonitorIdNode monitorId) { 50 this(TYPE, object, monitorId); 51 } 52 53 public MonitorEnterNode(NodeClass<? extends MonitorEnterNode> c, ValueNode object, MonitorIdNode monitorId) { 54 super(c, object, monitorId); 55 } 56 57 @Override 58 public LocationIdentity getLocationIdentity() { 59 return LocationIdentity.any(); 60 } 61 62 @Override 63 public void lower(LoweringTool tool) { 64 tool.getLowerer().lower(this, tool); 65 } 66 67 @Override 68 public void virtualize(VirtualizerTool tool) { 69 ValueNode alias = tool.getAlias(object()); 70 if (alias instanceof VirtualObjectNode) { 71 VirtualObjectNode virtual = (VirtualObjectNode) alias; 72 if (virtual.hasIdentity()) { 73 tool.addLock(virtual, getMonitorId()); 74 tool.delete(); 75 } 76 } 77 } 78 }