1 /* 2 * Copyright (c) 2014, 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; 24 25 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_30; 26 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_50; 27 28 import org.graalvm.compiler.core.common.type.StampFactory; 29 import org.graalvm.compiler.graph.NodeClass; 30 import org.graalvm.compiler.nodeinfo.NodeInfo; 31 import org.graalvm.compiler.nodes.FixedNode; 32 import org.graalvm.compiler.nodes.FixedWithNextNode; 33 import org.graalvm.compiler.nodes.StructuredGraph; 34 import org.graalvm.compiler.nodes.spi.Lowerable; 35 import org.graalvm.compiler.nodes.spi.LoweringTool; 36 37 /** 38 * A node for platform dependent verification of the Java heap. Intended to be used for debugging 39 * heap corruption issues. 40 */ 41 @NodeInfo(cycles = CYCLES_30, size = SIZE_50) 42 public final class VerifyHeapNode extends FixedWithNextNode implements Lowerable { 43 44 public static final NodeClass<VerifyHeapNode> TYPE = NodeClass.create(VerifyHeapNode.class); 45 46 public VerifyHeapNode() { 47 super(TYPE, StampFactory.forVoid()); 48 } 49 50 @Override 51 public void lower(LoweringTool tool) { 52 tool.getLowerer().lower(this, tool); 53 } 54 55 public static void addBefore(FixedNode position) { 56 StructuredGraph graph = position.graph(); 57 graph.addBeforeFixed(position, graph.add(new VerifyHeapNode())); 58 } 59 60 public static void addAfter(FixedWithNextNode position) { 61 StructuredGraph graph = position.graph(); 62 graph.addAfterFixed(position, graph.add(new VerifyHeapNode())); 63 } 64 65 }