1 /*
   2  * Copyright (c) 2015, 2018, 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 
  24 
  25 package org.graalvm.compiler.nodes;
  26 
  27 import java.util.List;
  28 
  29 import jdk.internal.vm.compiler.collections.EconomicSet;
  30 import org.graalvm.compiler.graph.NodeClass;
  31 
  32 import jdk.vm.ci.meta.Assumptions;
  33 import jdk.vm.ci.meta.ResolvedJavaField;
  34 import jdk.vm.ci.meta.ResolvedJavaMethod;
  35 
  36 /**
  37  * A {@link StructuredGraph} encoded in a compact binary representation as a byte[] array. See
  38  * {@link GraphEncoder} for a description of the encoding format. Use {@link GraphDecoder} for
  39  * decoding.
  40  */
  41 public class EncodedGraph {
  42 
  43     private final byte[] encoding;
  44     private final int startOffset;
  45     protected final Object[] objects;
  46     private final NodeClass<?>[] types;
  47     private final Assumptions assumptions;
  48     private final List<ResolvedJavaMethod> inlinedMethods;
  49     private final boolean trackNodeSourcePosition;
  50     private final EconomicSet<ResolvedJavaField> fields;
  51     private final boolean hasUnsafeAccess;
  52 
  53     /**
  54      * The "table of contents" of the encoded graph, i.e., the mapping from orderId numbers to the
  55      * offset in the encoded byte[] array. Used as a cache during decoding.
  56      */
  57     protected int[] nodeStartOffsets;
  58 
  59     public EncodedGraph(byte[] encoding, int startOffset, Object[] objects, NodeClass<?>[] types, StructuredGraph sourceGraph) {
  60         this(encoding, startOffset, objects, types, sourceGraph.getAssumptions(), sourceGraph.getMethods(), sourceGraph.getFields(), sourceGraph.hasUnsafeAccess(),
  61                         sourceGraph.trackNodeSourcePosition());
  62     }
  63 
  64     public EncodedGraph(byte[] encoding, int startOffset, Object[] objects, NodeClass<?>[] types, Assumptions assumptions, List<ResolvedJavaMethod> inlinedMethods,
  65                     EconomicSet<ResolvedJavaField> fields, boolean hasUnsafeAccess, boolean trackNodeSourcePosition) {
  66         this.encoding = encoding;
  67         this.startOffset = startOffset;
  68         this.objects = objects;
  69         this.types = types;
  70         this.assumptions = assumptions;
  71         this.inlinedMethods = inlinedMethods;
  72         this.trackNodeSourcePosition = trackNodeSourcePosition;
  73         this.fields = fields;
  74         this.hasUnsafeAccess = hasUnsafeAccess;
  75     }
  76 
  77     public byte[] getEncoding() {
  78         return encoding;
  79     }
  80 
  81     public int getStartOffset() {
  82         return startOffset;
  83     }
  84 
  85     protected Object[] getObjects() {
  86         return objects;
  87     }
  88 
  89     public int getNumObjects() {
  90         return objects.length;
  91     }
  92 
  93     public Object getObject(int i) {
  94         return objects[i];
  95     }
  96 
  97     public NodeClass<?>[] getNodeClasses() {
  98         return types;
  99     }
 100 
 101     public Assumptions getAssumptions() {
 102         return assumptions;
 103     }
 104 
 105     public List<ResolvedJavaMethod> getInlinedMethods() {
 106         return inlinedMethods;
 107     }
 108 
 109     public boolean trackNodeSourcePosition() {
 110         return trackNodeSourcePosition;
 111     }
 112 
 113     public EconomicSet<ResolvedJavaField> getFields() {
 114         return fields;
 115     }
 116 
 117     public boolean hasUnsafeAccess() {
 118         return hasUnsafeAccess;
 119     }
 120 
 121     @SuppressWarnings("unused")
 122     public boolean isCallToOriginal(ResolvedJavaMethod callTarget) {
 123         return false;
 124     }
 125 }