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//
// Analysis.GenericNumericalAnalysis.cs
//
// Authors:
// Alexander Chebaturkin (chebaturkin@gmail.com)
//
// Copyright (C) 2012 Alexander Chebaturkin
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using Mono.CodeContracts.Static.AST;
using Mono.CodeContracts.Static.Analysis.Drivers;
using Mono.CodeContracts.Static.ControlFlow;
using Mono.CodeContracts.Static.DataFlowAnalysis;
using Mono.CodeContracts.Static.DataStructures;
using Mono.CodeContracts.Static.Lattices;
using Mono.CodeContracts.Static.Proving;
namespace Mono.CodeContracts.Static.Analysis.Numerical {
static partial class AnalysisFacade {
static partial class Bind<TVar, TExpr> where TExpr : IEquatable<TExpr> where TVar : IEquatable<TVar> {
class GenericNumericalAnalysis :
GenericValueAnalysis<INumericalEnvironmentDomain<BoxedVariable<TVar>, BoxedExpression>> {
readonly Analysers.ArithmeticEnvironmentKind env_kind;
public GenericNumericalAnalysis (string methodName,
IMethodDriver<TExpr, TVar> methodDriver,
Analysers.ArithmeticEnvironmentKind envKind)
: base (methodName, methodDriver)
{
env_kind = envKind;
}
public override INumericalEnvironmentDomain<BoxedVariable<TVar>, BoxedExpression>
TopValue ()
{
switch (env_kind) {
case Analysers.ArithmeticEnvironmentKind.Intervals:
return
new IntervalEnvironment<BoxedVariable<TVar>, BoxedExpression> (
ExpressionDecoder);
case Analysers.ArithmeticEnvironmentKind.DisIntervals:
return
new DisIntervalEnvironment<BoxedVariable<TVar>, BoxedExpression>
(ExpressionDecoder);
default:
throw new AbstractInterpretationException (
"Unknown arithmetic environment kind.");
}
}
public override IFactQuery<BoxedExpression, TVar> FactQuery
(IFixPointInfo
<APC, INumericalEnvironmentDomain<BoxedVariable<TVar>, BoxedExpression>
> fixpoint)
{
return new ConstantPropagationFactQuery<TVar> ();
}
public override INumericalEnvironmentDomain<BoxedVariable<TVar>, BoxedExpression> Entry
(APC pc, Method method,
INumericalEnvironmentDomain<BoxedVariable<TVar>, BoxedExpression> data)
{
foreach (var param in MetaDataProvider.Parameters (method).AsEnumerable ()) {
TVar variable;
var readAt = ContextProvider.MethodContext.CFG.Post (pc);
if (!ContextProvider.ValueContext.TryParameterValue (readAt, param, out variable))
continue;
var abstractType = ContextProvider.ValueContext.GetType (readAt,
variable);
if (abstractType.IsNormal () && MetaDataProvider.IsPrimitive (abstractType.Value))
data = SetInitialRange (variable, abstractType.Value, data);
}
return data;
}
INumericalEnvironmentDomain<BoxedVariable<TVar>, BoxedExpression> SetInitialRange
(TVar variable, TypeNode type,
INumericalEnvironmentDomain<BoxedVariable<TVar>, BoxedExpression> data)
{
var interval = Interval.Ranges.GetIntervalForType (type,
MetaDataProvider);
if (interval.IsNormal ())
data = data.AssumeVariableIn (new BoxedVariable<TVar> (variable),
interval);
return data;
}
}
}
}
}
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