99 lines
3.9 KiB
C#
99 lines
3.9 KiB
C#
//
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// AnalysisDecoder.cs
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//
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// Authors:
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// Alexander Chebaturkin (chebaturkin@gmail.com)
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//
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// Copyright (C) 2011 Alexander Chebaturkin
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using Mono.CodeContracts.Static.AST;
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using Mono.CodeContracts.Static.AST.Visitors;
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using Mono.CodeContracts.Static.Analysis.ExpressionAnalysis.Expressions;
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using Mono.CodeContracts.Static.ControlFlow;
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using Mono.CodeContracts.Static.Lattices;
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namespace Mono.CodeContracts.Static.Analysis.ExpressionAnalysis {
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class AnalysisDecoder<TSymValue> : ILVisitorBase<APC, TSymValue, TSymValue, ExprDomain<TSymValue>, ExprDomain<TSymValue>>
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where TSymValue : IEquatable<TSymValue> {
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public override ExprDomain<TSymValue> DefaultVisit (APC pc, ExprDomain<TSymValue> data)
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{
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return data;
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}
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public override ExprDomain<TSymValue> Assume (APC pc, EdgeTag tag, TSymValue condition, ExprDomain<TSymValue> data)
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{
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FlatDomain<Expr<TSymValue>> aExpression = data [condition];
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if (aExpression.IsNormal()) {
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bool truth = tag != EdgeTag.False;
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data = aExpression.Value.Decode<ExprDomain<TSymValue>, ExprDomain<TSymValue>, AssumeDecoder<TSymValue>>
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(pc, condition, new AssumeDecoder<TSymValue> (truth), data);
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}
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return data;
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}
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public override ExprDomain<TSymValue> Assert (APC pc, EdgeTag tag, TSymValue condition, ExprDomain<TSymValue> data)
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{
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FlatDomain<Expr<TSymValue>> expression = data [condition];
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if (expression.IsNormal()) {
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data = expression.Value.Decode<ExprDomain<TSymValue>, ExprDomain<TSymValue>, AssumeDecoder<TSymValue>>
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(pc, condition, new AssumeDecoder<TSymValue> (true), data);
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}
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return data;
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}
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public override ExprDomain<TSymValue> Binary (APC pc, BinaryOperator op, TSymValue dest, TSymValue operand1, TSymValue operand2, ExprDomain<TSymValue> data)
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{
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return data.Add (dest, new BinaryExpr<TSymValue> (operand1, operand2, op));
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}
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public override ExprDomain<TSymValue> Isinst (APC pc, TypeNode type, TSymValue dest, TSymValue obj, ExprDomain<TSymValue> data)
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{
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return data.Add (dest, new IsInstExpr<TSymValue> (obj, type));
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}
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public override ExprDomain<TSymValue> LoadConst (APC pc, TypeNode type, object constant, TSymValue dest, ExprDomain<TSymValue> data)
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{
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return data.Add (dest, new ConstExpr<TSymValue> (type, constant));
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}
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public override ExprDomain<TSymValue> LoadNull (APC pc, TSymValue dest, ExprDomain<TSymValue> polarity)
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{
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return polarity.Add (dest, NullExpr<TSymValue>.Instance);
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}
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public override ExprDomain<TSymValue> Sizeof (APC pc, TypeNode type, TSymValue dest, ExprDomain<TSymValue> data)
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{
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return data.Add (dest, new SizeOfExpr<TSymValue> (type));
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}
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public override ExprDomain<TSymValue> Unary (APC pc, UnaryOperator op, bool unsigned, TSymValue dest, TSymValue source, ExprDomain<TSymValue> data)
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{
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return data.Add (dest, new UnaryExpr<TSymValue> (source, op, unsigned));
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}
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}
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}
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