mcs/class/Mono.CodeContracts/Mono.CodeContracts.Static.ControlFlow/ContractFilteredCFG.cs

   1 //
   2 // ContractFilteredCFG.cs
   3 //
   4 // Authors:
   5 //      Alexander Chebaturkin (chebaturkin@gmail.com)
   6 //
   7 // Copyright (C) 2011 Alexander Chebaturkin
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System;
  30 using System.Collections.Generic;
  31 using System.IO;
  32 using Mono.CodeContracts.Static.Analysis;
  33 using Mono.CodeContracts.Static.DataStructures;
  34 using Mono.CodeContracts.Static.Providers;
  35
  36 namespace Mono.CodeContracts.Static.ControlFlow {
  37         class ContractFilteredCFG : ICFG, IEdgeSubroutineAdaptor {
  38                 private readonly ICFG underlying;
  39
  40                 public ContractFilteredCFG (ICFG cfg)
  41                 {
  42                         this.underlying = cfg;
  43                 }
  44
  45                 #region ICFG Members
  46                 public APC Entry
  47                 {
  48                         get { return this.underlying.Entry; }
  49                 }
  50
  51                 public APC EntryAfterRequires
  52                 {
  53                         get { return this.underlying.EntryAfterRequires; }
  54                 }
  55
  56                 public APC NormalExit
  57                 {
  58                         get { return this.underlying.NormalExit; }
  59                 }
  60
  61                 public APC ExceptionExit
  62                 {
  63                         get { return this.underlying.ExceptionExit; }
  64                 }
  65
  66                 public Subroutine Subroutine
  67                 {
  68                         get { return this.underlying.Subroutine; }
  69                 }
  70
  71                 public APC Next (APC pc)
  72                 {
  73                         return this.underlying.Next (pc);
  74                 }
  75
  76                 public bool HasSingleSuccessor (APC pc, out APC ifFound)
  77                 {
  78                         DecoratorHelper.Push<IEdgeSubroutineAdaptor> (this);
  79                         try {
  80                                 return this.underlying.HasSingleSuccessor (pc, out ifFound);
  81                         } finally {
  82                                 DecoratorHelper.Pop ();
  83                         }
  84                 }
  85
  86                 public IEnumerable<APC> Successors (APC pc)
  87                 {
  88                         DecoratorHelper.Push<IEdgeSubroutineAdaptor> (this);
  89                         try {
  90                                 return this.underlying.Successors (pc);
  91                         } finally {
  92                                 DecoratorHelper.Pop ();
  93                         }
  94                 }
  95
  96                 public bool HasSinglePredecessor (APC pc, out APC ifFound)
  97                 {
  98                         DecoratorHelper.Push<IEdgeSubroutineAdaptor> (this);
  99                         try {
 100                                 return this.underlying.HasSinglePredecessor (pc, out ifFound);
 101                         } finally {
 102                                 DecoratorHelper.Pop ();
 103                         }
 104                 }
 105
 106                 public IEnumerable<APC> Predecessors (APC pc)
 107                 {
 108                         DecoratorHelper.Push<IEdgeSubroutineAdaptor> (this);
 109                         try {
 110                                 return this.underlying.Predecessors (pc);
 111                         } finally {
 112                                 DecoratorHelper.Pop ();
 113                         }
 114                 }
 115
 116                 public bool IsJoinPoint (APC pc)
 117                 {
 118                         return this.underlying.IsJoinPoint (pc);
 119                 }
 120
 121                 public bool IsSplitPoint (APC pc)
 122                 {
 123                         return this.underlying.IsSplitPoint (pc);
 124                 }
 125
 126                 public bool IsBlockStart (APC pc)
 127                 {
 128                         return this.underlying.IsBlockStart (pc);
 129                 }
 130
 131                 public bool IsBlockEnd (APC pc)
 132                 {
 133                         return this.underlying.IsBlockEnd (pc);
 134                 }
 135
 136                 public IILDecoder<APC, Dummy, Dummy, IMethodContextProvider, Dummy> GetDecoder (IMetaDataProvider metaDataProvider)
 137                 {
 138                         return this.underlying.GetDecoder (metaDataProvider);
 139                 }
 140
 141                 public void Print (TextWriter tw, ILPrinter<APC> printer,
 142                                    Func<CFGBlock, IEnumerable<LispList<Edge<CFGBlock, EdgeTag>>>> contextLookup,
 143                                    LispList<Edge<CFGBlock, EdgeTag>> context)
 144                 {
 145                         DecoratorHelper.Push<IEdgeSubroutineAdaptor> (this);
 146                         try {
 147                                 this.underlying.Print (tw, printer, contextLookup, context);
 148                         } finally {
 149                                 DecoratorHelper.Pop ();
 150                         }
 151                 }
 152                 #endregion
 153
 154                 #region Implementation of IEdgeSubroutineAdaptor
 155                 LispList<Pair<EdgeTag, Subroutine>> IEdgeSubroutineAdaptor.GetOrdinaryEdgeSubroutinesInternal (CFGBlock @from, CFGBlock to,
 156                                                                                                                LispList<Edge<CFGBlock, EdgeTag>> context)
 157                 {
 158                         return DecoratorHelper.Inner<IEdgeSubroutineAdaptor> (this)
 159                                 .GetOrdinaryEdgeSubroutinesInternal (from, to, context).Where ((pair) => !pair.Value.IsContract && !pair.Value.IsOldValue);
 160                 }
 161                 #endregion
 162         }
 163 }