5 // Alexander Chebaturkin (chebaturkin@gmail.com)
7 // Copyright (C) 2012 Alexander Chebaturkin
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:
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
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.
31 using Mono.CodeContracts.Static.AST.Visitors;
32 using Mono.CodeContracts.Static.Analysis.ExpressionAnalysis.Expressions;
33 using Mono.CodeContracts.Static.ControlFlow;
34 using Mono.CodeContracts.Static.DataFlowAnalysis;
35 using Mono.CodeContracts.Static.DataStructures;
36 using Mono.CodeContracts.Static.Lattices;
38 namespace Mono.CodeContracts.Static.Analysis.ExpressionAnalysis {
39 class ValueAnalysis<SymbolicValue, Context, EdgeData> : IAnalysis<APC, ExprDomain<SymbolicValue>,
40 IILVisitor<APC, SymbolicValue, SymbolicValue, ExprDomain<SymbolicValue>, ExprDomain<SymbolicValue>>, EdgeData>
41 where SymbolicValue : IEquatable<SymbolicValue>
42 where Context : IValueContextProvider<SymbolicValue>
43 where EdgeData : IImmutableMap<SymbolicValue, Sequence<SymbolicValue>> {
44 private readonly ExpressionAnalysisFacade<SymbolicValue, Context, EdgeData> parent;
46 public ValueAnalysis (ExpressionAnalysisFacade<SymbolicValue, Context, EdgeData> parent)
51 #region Implementation of IAnalysis<APC,ExpressionAnalysis<Local,Parameter,Method,Field,Property,Event,Type,Attribute,Assembly,SymbolicValue,contextProvider,EdgeData>.Domain,IILVisitor<APC,Local,Parameter,Method,Field,Type,SymbolicValue,SymbolicValue,ExpressionAnalysis<Local,Parameter,Method,Field,Property,Event,Type,Attribute,Assembly,SymbolicValue,contextProvider,EdgeData>.Domain,ExpressionAnalysis<Local,Parameter,Method,Field,Property,Event,Type,Attribute,Assembly,SymbolicValue,contextProvider,EdgeData>.Domain>,EdgeData>
52 public ExprDomain<SymbolicValue> EdgeConversion (APC @from, APC to, bool isJoinPoint, EdgeData sourceTargetMap, ExprDomain<SymbolicValue> originalState)
54 if (sourceTargetMap == null)
57 if (DebugOptions.Debug)
59 Console.WriteLine ("====Expression analysis Parallel assign====");
60 DumpMap (sourceTargetMap);
61 DumpExpressions ("original expressions", originalState);
64 ExprDomain<SymbolicValue> result = originalState.Empty ();
65 ExprDomain<SymbolicValue> domain = originalState.Empty ();
67 foreach (SymbolicValue sv in originalState.Keys) {
68 Expr<SymbolicValue> expression = originalState [sv].Value.Substitute (sourceTargetMap);
69 if (expression != null)
70 domain = domain.Add (sv, expression);
73 foreach (SymbolicValue sv in sourceTargetMap.Keys) {
74 FlatDomain<Expr<SymbolicValue>> expressionDomain = domain [sv];
75 if (expressionDomain.IsNormal()) {
76 Expr<SymbolicValue> expression = expressionDomain.Value;
77 foreach (SymbolicValue sub in sourceTargetMap [sv].AsEnumerable ())
78 result = result.Add (sub, expression);
82 if (DebugOptions.Debug)
84 DumpExpressions ("new expressions", result);
89 public IILVisitor<APC, SymbolicValue, SymbolicValue, ExprDomain<SymbolicValue>, ExprDomain<SymbolicValue>> GetVisitor ()
91 return new AnalysisDecoder<SymbolicValue> ();
94 public ExprDomain<SymbolicValue> Join (Pair<APC, APC> edge, ExprDomain<SymbolicValue> newstate, ExprDomain<SymbolicValue> prevstate, out bool weaker, bool widen)
96 return prevstate.Join (newstate, widen, out weaker);
99 public ExprDomain<SymbolicValue> ImmutableVersion (ExprDomain<SymbolicValue> arg)
104 public ExprDomain<SymbolicValue> MutableVersion (ExprDomain<SymbolicValue> arg)
109 public bool IsBottom (APC pc, ExprDomain<SymbolicValue> state)
111 return state.IsBottom;
114 public Predicate<APC> SaveFixPointInfo (IFixPointInfo<APC, ExprDomain<SymbolicValue>> fixPointInfo)
116 this.parent.SaveFixPointInfo (fixPointInfo);
120 public void Dump (Pair<ExprDomain<SymbolicValue>, TextWriter> pair)
122 pair.Key.Dump (pair.Value);
125 private void DumpMap (IImmutableMap<SymbolicValue, Sequence<SymbolicValue>> sourceTargetMap)
127 Console.WriteLine ("Source-Target assignment");
128 foreach (SymbolicValue key in sourceTargetMap.Keys) {
129 foreach (SymbolicValue value in sourceTargetMap [key].AsEnumerable ())
130 Console.Write ("{0} ", value);
131 Console.WriteLine (" := {0}", key);
135 private void DumpExpressions (string header, ExprDomain<SymbolicValue> state)
137 Console.WriteLine ("--- {0} ---", header);
138 foreach (SymbolicValue index in state.Keys) {
139 FlatDomain<Expr<SymbolicValue>> domain = state [index];
140 if (domain.IsNormal())
141 Console.WriteLine ("{0} -> {1}", index, domain.Value);
142 else if (domain.IsTop)
143 Console.WriteLine ("{0} -> (Top)", index);
144 else if (domain.IsBottom)
145 Console.WriteLine ("{0} -> (Bot)", index);