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//
// CodeContractsAnalysisDriver.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.ExpressionAnalysis;
using Mono.CodeContracts.Static.Analysis.ExpressionAnalysis.Decoding;
using Mono.CodeContracts.Static.Analysis.HeapAnalysis;
using Mono.CodeContracts.Static.ControlFlow;
using Mono.CodeContracts.Static.DataStructures;
using Mono.CodeContracts.Static.Lattices;
using Mono.CodeContracts.Static.Providers;
using Mono.CodeContracts.Static.Proving;
namespace Mono.CodeContracts.Static.Analysis.Drivers {
class CodeContractsAnalysisDriver<MethodResult>
: AnalysisDriver<LabeledSymbol<APC, SymbolicValue>, SymbolicValue> {
public CodeContractsAnalysisDriver (IBasicAnalysisDriver basicDriver)
: base (basicDriver)
{
}
public override IMethodDriver<LabeledSymbol<APC, SymbolicValue>, SymbolicValue> CreateMethodDriver (Method method)
{
return new MethodDriver (method, this);
}
#region Nested type: MethodDriver
private class MethodDriver : BasicMethodDriver,
IMethodDriver<LabeledSymbol<APC, SymbolicValue>, SymbolicValue>,
IFactBase<SymbolicValue> {
private Func<LabeledSymbol<APC, SymbolicValue>, string> expr2String;
private IFullExpressionDecoder<SymbolicValue, LabeledSymbol<APC, SymbolicValue>> expression_decoder;
private HeapAnalysis.HeapAnalysis heap_analysis;
public MethodDriver (Method method,
CodeContractsAnalysisDriver<MethodResult> parent)
: base (method, parent)
{
}
private new AnalysisDriver<LabeledSymbol<APC, SymbolicValue>, SymbolicValue> AnalysisDriver
{
get { return (AnalysisDriver<LabeledSymbol<APC, SymbolicValue>, SymbolicValue>) base.AnalysisDriver; }
}
#region IFactBase<SymbolicValue> Members
public FlatDomain<bool> IsNull (APC pc, SymbolicValue variable)
{
return ProofOutcome.Top;
}
public FlatDomain<bool> IsNonNull(APC pc, SymbolicValue variable)
{
return ProofOutcome.Top;
}
public bool IsUnreachable (APC pc)
{
return this.heap_analysis.IsUnreachable (pc);
}
#endregion
#region IMethodDriver<LabeledSymbol<APC,SymbolicValue>,SymbolicValue> Members
public ICodeLayer<SymbolicValue, SymbolicValue,
IValueContextProvider<SymbolicValue>,
IImmutableMap<SymbolicValue, Sequence<SymbolicValue>>> ValueLayer { get; private set; }
public ICodeLayer<LabeledSymbol<APC, SymbolicValue>, SymbolicValue,
IExpressionContextProvider<LabeledSymbol<APC, SymbolicValue>, SymbolicValue>,
IImmutableMap<SymbolicValue, Sequence<SymbolicValue>>> ExpressionLayer { get; private set; }
public ICodeLayer<SymbolicValue, SymbolicValue,
IValueContextProvider<SymbolicValue>,
IImmutableMap<SymbolicValue, Sequence<SymbolicValue>>> HybridLayer { get; private set; }
public IExpressionContextProvider<LabeledSymbol<APC, SymbolicValue>, SymbolicValue> ContextProvider
{
get { return ExpressionLayer.ILDecoder.ContextProvider; }
}
public IMetaDataProvider MetaDataProvider
{
get { return RawLayer.MetaDataProvider; }
}
public IFactBase<SymbolicValue> BasicFacts
{
get { return this; }
}
public IFullExpressionDecoder<SymbolicValue, LabeledSymbol<APC, SymbolicValue>> ExpressionDecoder
{
get
{
if (this.expression_decoder == null)
this.expression_decoder =
new FullExpressionDecoder<SymbolicValue, LabeledSymbol<APC, SymbolicValue>>(MetaDataProvider, ContextProvider);
return this.expression_decoder;
}
}
public void RunHeapAndExpressionAnalyses ()
{
if (this.heap_analysis != null)
return;
this.heap_analysis = new HeapAnalysis.HeapAnalysis (StackLayer);
StackLayer.CreateForward (this.heap_analysis) (this.heap_analysis.InitialValue ());
ValueLayer = CodeLayerFactory.Create (
this.heap_analysis.GetDecoder (StackLayer.ILDecoder), StackLayer.MetaDataProvider, StackLayer.ContractProvider,
source => source.ToString (), dest => dest.ToString ());
var expressionAnalysis = new ExpressionAnalysisFacade<SymbolicValue, IValueContextProvider<SymbolicValue>, IImmutableMap<SymbolicValue, Sequence<SymbolicValue>>>
(ValueLayer, this.heap_analysis.IsUnreachable);
ValueLayer.CreateForward (expressionAnalysis.CreateExpressionAnalysis ()) (expressionAnalysis.InitialValue (SymbolicValue.GetUniqueKey));
if (DebugOptions.Debug)
{
Console.WriteLine ("------------Value based CFG-----------------");
ValueLayer.ILDecoder.ContextProvider.MethodContext.CFG.Print (Console.Out, ValueLayer.Printer, null, null);
}
IILDecoder
<APC, LabeledSymbol<APC, SymbolicValue>, SymbolicValue, IExpressionContextProvider<LabeledSymbol<APC, SymbolicValue>, SymbolicValue>, IImmutableMap<SymbolicValue, Sequence<SymbolicValue>>>
decoder = expressionAnalysis.GetDecoder (ValueLayer.ILDecoder);
this.expr2String = ExpressionPrinterFactory.Printer (decoder.ContextProvider, this);
ExpressionLayer = CodeLayerFactory.Create (decoder, ValueLayer.MetaDataProvider, ValueLayer.ContractProvider,
this.expr2String, ValueLayer.VariableToString);
if (DebugOptions.Debug)
{
Console.WriteLine ("------------Expression based CFG-------------");
ExpressionLayer.ILDecoder.ContextProvider.MethodContext.CFG.Print (Console.Out, ExpressionLayer.Printer, null, null);
}
HybridLayer = CodeLayerFactory.Create (ValueLayer.ILDecoder, ValueLayer.MetaDataProvider, ValueLayer.ContractProvider,
ValueLayer.ExpressionToString,
ValueLayer.VariableToString, ExpressionLayer.Printer);
}
public int KeyConverter (SymbolicValue var)
{
return SymbolicValue.GetUniqueKey (var);
}
#endregion
}
#endregion
}
}
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