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//
// AbstractDomainUpdate.cs
//
// Authors:
// Alexander Chebaturkin (chebaturkin@gmail.com)
//
// Copyright (C) 2011 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;
namespace Mono.CodeContracts.Static.Analysis.HeapAnalysis.SymbolicGraph {
class AbstractDomainUpdate<TFunc, TAbstractDomain> : Update<TFunc, TAbstractDomain>
where TFunc : IEquatable<TFunc>, IConstantInfo
where TAbstractDomain : IAbstractDomainForEGraph<TAbstractDomain>, IEquatable<TAbstractDomain> {
private readonly SymValue sv;
public AbstractDomainUpdate (SymValue sv)
{
this.sv = sv;
}
#region Overrides of Update
public override void Replay (MergeInfo<TFunc, TAbstractDomain> merge)
{
if (!merge.IsCommon (this.sv))
return;
TAbstractDomain val1 = merge.Graph1 [this.sv];
TAbstractDomain val2 = merge.Graph2 [this.sv];
bool weaker;
TAbstractDomain join = val1.Join (val2, merge.Widen, out weaker);
TAbstractDomain wasInResult = merge.Result [this.sv];
if (weaker) {
if (DebugOptions.Debug)
{
Console.WriteLine ("----SymGraph changed during AbstractDomainUpdate of {3} " +
"due to weaker abstractValue join (val1 = {0}, val2 = {1}, wasInResult = {2}",
val1, val2, wasInResult, this.sv);
}
merge.Changed = true;
}
if (join.Equals (wasInResult))
return;
merge.Result [this.sv] = join;
}
public override void ReplayElimination (MergeInfo<TFunc, TAbstractDomain> merge)
{
if (!merge.IsCommon (this.sv))
return;
TAbstractDomain val1 = merge.Graph1 [this.sv];
if (val1.IsTop)
merge.Result [this.sv] = val1;
else {
TAbstractDomain val2 = merge.Graph2 [this.sv];
if (val2.IsTop)
merge.Result [this.sv] = val2;
}
}
#endregion
}
}
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