mcs/class/Mono.CodeContracts/Mono.CodeContracts.Static.Analysis.ExpressionAnalysis/ExpressionAnalysisFacade.cs

   1 //
   2 // ExpressionAnalysisFacade.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 Mono.CodeContracts.Static.AST.Visitors;
  31 using Mono.CodeContracts.Static.Analysis.HeapAnalysis;
  32 using Mono.CodeContracts.Static.ControlFlow;
  33 using Mono.CodeContracts.Static.DataFlowAnalysis;
  34 using Mono.CodeContracts.Static.DataStructures;
  35 using Mono.CodeContracts.Static.Providers;
  36
  37 namespace Mono.CodeContracts.Static.Analysis.ExpressionAnalysis {
  38         class ExpressionAnalysisFacade<TSymValue, TContext, TEdgeData>
  39                 where TSymValue : IEquatable<TSymValue>
  40                 where TContext : IValueContextProvider<TSymValue>
  41                 where TEdgeData : IImmutableMap<TSymValue, LispList<TSymValue>> {
  42
  43                 public readonly Predicate<APC> IsUnreachable;
  44
  45                 public readonly ICodeLayer<TSymValue, TSymValue, TContext, TEdgeData> ValueLayer;
  46                 private IFixPointInfo<APC, ExprDomain<TSymValue>> fix_point_info;
  47
  48                 public ExpressionAnalysisFacade (ICodeLayer<TSymValue, TSymValue, TContext, TEdgeData> valueLayer,
  49                                                  Predicate<APC> isUnreachable)
  50                 {
  51                         this.ValueLayer = valueLayer;
  52                         this.IsUnreachable = isUnreachable;
  53                 }
  54
  55                 public bool PreStateLookup (APC label, out ExprDomain<TSymValue> ifFound)
  56                 {
  57                         return this.fix_point_info.PreStateLookup (label, out ifFound);
  58                 }
  59
  60                 public bool PostStateLookup (APC label, out ExprDomain<TSymValue> ifFound)
  61                 {
  62                         return this.fix_point_info.PostStateLookup (label, out ifFound);
  63                 }
  64
  65                 public void SaveFixPointInfo (IFixPointInfo<APC, ExprDomain<TSymValue>> fixPointInfo)
  66                 {
  67                         this.fix_point_info = fixPointInfo;
  68                 }
  69
  70                 public ExprDomain<TSymValue> InitialValue (Func<TSymValue, int> keyConverter)
  71                 {
  72                         return ExprDomain<TSymValue>.TopValue (keyConverter);
  73                 }
  74
  75                 public IAnalysis<APC, ExprDomain<TSymValue>, IILVisitor<APC, TSymValue, TSymValue, ExprDomain<TSymValue>, ExprDomain<TSymValue>>, TEdgeData>
  76                         CreateExpressionAnalysis ()
  77                 {
  78                         return new ValueAnalysis<TSymValue, TContext, TEdgeData> (this);
  79                 }
  80
  81                 public IILDecoder<APC, LabeledSymbol<APC, TSymValue>, TSymValue, IExpressionContextProvider<LabeledSymbol<APC, TSymValue>, TSymValue>, TEdgeData>
  82                         GetDecoder (
  83                         IILDecoder<APC, TSymValue, TSymValue, IValueContextProvider<TSymValue>, TEdgeData> ilDecoder)
  84                 {
  85                         return new ExpressionDecoder<TSymValue, TContext, TEdgeData> (ilDecoder, this);
  86                 }
  87         }
  88 }