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 }