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//
// Subroutine.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;
using System.Collections.Generic;
using System.IO;
using Mono.CodeContracts.Static.Analysis;
using Mono.CodeContracts.Static.DataStructures;
namespace Mono.CodeContracts.Static.ControlFlow {
abstract class Subroutine : IPropertyCollection, IEquatable<Subroutine> {
private static int _subroutineIdGenerator;
private readonly PropertyCollection properties = new PropertyCollection ();
private readonly int subroutine_id = _subroutineIdGenerator++;
public virtual SubroutineKind Kind
{
get { return SubroutineKind.Unknown; }
}
public int Id
{
get { return this.subroutine_id; }
}
public abstract CFGBlock Entry { get; }
public abstract CFGBlock EntryAfterRequires { get; }
public abstract CFGBlock Exit { get; }
public abstract CFGBlock ExceptionExit { get; }
public abstract string Name { get; }
public abstract int BlockCount { get; }
public abstract IEnumerable<CFGBlock> Blocks { get; }
public virtual bool IsRequires
{
get { return false; }
}
public virtual bool IsEnsures
{
get { return false; }
}
public virtual bool IsOldValue
{
get { return false; }
}
public virtual bool IsMethod
{
get { return false; }
}
public virtual bool IsConstructor
{
get { return false; }
}
public virtual bool IsInvariant
{
get { return false; }
}
public virtual bool IsContract
{
get { return false; }
}
public bool IsEnsuresOrOldValue
{
get { return IsEnsures || IsOldValue; }
}
public abstract EdgeMap<EdgeTag> SuccessorEdges { get; }
public abstract EdgeMap<EdgeTag> PredecessorEdges { get; }
public abstract DepthFirst.Visitor<CFGBlock, Dummy> EdgeInfo { get; }
public virtual bool IsFaultFinally
{
get { return false; }
}
public abstract bool HasReturnValue { get; }
public abstract bool HasContextDependentStackDepth { get; }
public abstract int StackDelta { get; }
#region IPropertyCollection Members
public bool TryGetValue<T> (TypedKey key, out T value)
{
return this.properties.TryGetValue (key, out value);
}
#endregion
#region Implementation of IPropertyCollection
public bool Contains (TypedKey key)
{
return this.properties.Contains (key);
}
public void Add<T> (TypedKey key, T value)
{
this.properties.Add (key, value);
}
#endregion
public override string ToString ()
{
return string.Format ("SR {0}: BlockCount:{1}, Kind:{2}", Id, BlockCount, Kind);
}
public abstract IEnumerable<CFGBlock> SuccessorBlocks (CFGBlock block);
public IEnumerable<Pair<EdgeTag, CFGBlock>> SuccessorEdgesFor (CFGBlock block)
{
return SuccessorEdges [block];
}
public abstract IEnumerable<CFGBlock> PredecessorBlocks (CFGBlock block);
public abstract bool IsJoinPoint (CFGBlock block);
public abstract bool IsSplitPoint (CFGBlock block);
public abstract bool HasSingleSuccessor (APC point, out APC ifFound);
public abstract bool HasSinglePredecessor (APC point, out APC ifFound);
public abstract void AddEdgeSubroutine (CFGBlock from, CFGBlock to, Subroutine subroutine, EdgeTag tag);
public abstract IEnumerable<APC> Successors (APC pc);
public abstract IEnumerable<APC> Predecessors (APC pc);
public abstract bool IsSubroutineEnd (CFGBlock block);
public abstract bool IsSubroutineStart (CFGBlock block);
public abstract bool IsCatchFilterHeader (CFGBlock block);
public abstract APC ComputeTargetFinallyContext (APC pc, CFGBlock succ);
public abstract Sequence<Pair<EdgeTag, Subroutine>> EdgeSubroutinesOuterToInner (CFGBlock current, CFGBlock succ, out bool isExceptionHandlerEdge, Sequence<Edge<CFGBlock, EdgeTag>> context);
public abstract Sequence<Pair<EdgeTag, Subroutine>> GetOrdinaryEdgeSubroutines (CFGBlock current, CFGBlock succ, Sequence<Edge<CFGBlock, EdgeTag>> context);
public abstract void Initialize ();
public abstract IEnumerable<Subroutine> UsedSubroutines (HashSet<int> alreadySeen);
public IEnumerable<Subroutine> UsedSubroutines ()
{
return UsedSubroutines (new HashSet<int> ());
}
public abstract IEnumerable<CFGBlock> ExceptionHandlers<Data, Type> (CFGBlock block, Subroutine innerSubroutine,
Data data, IHandlerFilter<Data> handlerPredicate);
public abstract void Print (TextWriter tw, ILPrinter<APC> printer,
Func<CFGBlock, IEnumerable<Sequence<Edge<CFGBlock, EdgeTag>>>> contextLookup,
Sequence<Edge<CFGBlock, EdgeTag>> context,
HashSet<Pair<Subroutine, Sequence<Edge<CFGBlock, EdgeTag>>>> set);
#region Implementation of IEquatable<Subroutine>
public bool Equals (Subroutine other)
{
return Id == other.Id;
}
#endregion
}
}
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