1/* 2 * Copyright (c) 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 */ 23package org.graalvm.compiler.nodes.debug.instrumentation; 24 25import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_IGNORED; 26import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_IGNORED; 27 28import org.graalvm.compiler.core.common.type.StampFactory; 29import org.graalvm.compiler.graph.NodeClass; 30import org.graalvm.compiler.nodeinfo.InputType; 31import org.graalvm.compiler.nodeinfo.NodeInfo; 32import org.graalvm.compiler.nodes.ValueNode; 33import org.graalvm.compiler.nodes.calc.FloatingNode; 34import org.graalvm.compiler.nodes.java.MonitorIdNode; 35import org.graalvm.compiler.nodes.java.RawMonitorEnterNode; 36 37/** 38 * The {@code MonitorProxyNode} represents the InstrumentationNode's target when the original 39 * MonitorEnterNode is invalid. Such situation occurs when the escape analysis removes the 40 * MonitorEnterNode and aggregates the monitor logic in a CommitAllocationNode. 41 */ 42@NodeInfo(cycles = CYCLES_IGNORED, size = SIZE_IGNORED) 43public class MonitorProxyNode extends FloatingNode { 44 45 public static final NodeClass<MonitorProxyNode> TYPE = NodeClass.create(MonitorProxyNode.class); 46 47 @OptionalInput(value = InputType.Unchecked) protected ValueNode object; 48 @OptionalInput(value = InputType.Association) protected MonitorIdNode monitorId; 49 50 public MonitorProxyNode(ValueNode object, MonitorIdNode monitorId) { 51 super(TYPE, StampFactory.forVoid()); 52 this.object = object; 53 this.monitorId = monitorId; 54 } 55 56 public ValueNode object() { 57 return object; 58 } 59 60 public MonitorIdNode getMonitorId() { 61 return monitorId; 62 } 63 64 /** 65 * @return the first RawMonitorEnterNode that shares the same MonitorIdNode and the same lock 66 * object with this MonitorProxyNode. 67 */ 68 public RawMonitorEnterNode findFirstMatch() { 69 for (RawMonitorEnterNode monitorEnter : monitorId.usages().filter(RawMonitorEnterNode.class)) { 70 if (monitorEnter.object() == object) { 71 return monitorEnter; 72 } 73 } 74 return null; 75 } 76 77} 78