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 */ 23 package org.graalvm.compiler.nodes.debug.instrumentation; 24 25 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_IGNORED; 26 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_IGNORED; 27 28 import org.graalvm.compiler.core.common.type.StampFactory; 29 import org.graalvm.compiler.graph.NodeClass; 30 import org.graalvm.compiler.nodeinfo.InputType; 31 import org.graalvm.compiler.nodeinfo.NodeInfo; 32 import org.graalvm.compiler.nodes.AbstractStateSplit; 33 import org.graalvm.compiler.nodes.ValueNode; 34 import org.graalvm.compiler.nodes.spi.LIRLowerable; 35 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; 36 37 /** 38 * The {@code InstrumentationBeginNode} represents the boundary of the instrumentation. It also 39 * maintains the target of the instrumentation. 40 */ 41 @NodeInfo(cycles = CYCLES_IGNORED, size = SIZE_IGNORED) 42 public final class InstrumentationBeginNode extends AbstractStateSplit implements LIRLowerable { 43 44 public static final NodeClass<InstrumentationBeginNode> TYPE = NodeClass.create(InstrumentationBeginNode.class); 45 46 @OptionalInput(value = InputType.Unchecked) protected ValueNode target; 47 private final boolean anchored; 48 49 public InstrumentationBeginNode(boolean anchored) { 50 super(TYPE, StampFactory.forVoid()); 51 this.anchored = anchored; 52 this.target = null; 53 54 } 55 56 public boolean isAnchored() { 57 return anchored; 58 } 59 60 public ValueNode getTarget() { 61 return target; 62 } 63 64 public void setTarget(ValueNode target) { 65 updateUsages(this.target, target); 66 this.target = target; 67 } 68 69 @Override 70 public void generate(NodeLIRBuilderTool generator) { 71 // do nothing 72 } 73 74 }