421 lines
14 KiB
C#
421 lines
14 KiB
C#
//
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// RemoveBranchDelegator.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.Collections.Generic;
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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.DataStructures;
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using Mono.CodeContracts.Static.Providers;
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namespace Mono.CodeContracts.Static.ControlFlow {
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/// <summary>
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/// This class wraps underlying visitor.
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/// Replaces: branches to nop; branchCond to binary.
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///
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/// EdgeTag.Requires: (inside method) => assume, (outside method) => assert
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/// EdgeTag.Ensures: (inside method) => assert, (outside method) => assume
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/// </summary>
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struct RemoveBranchDelegator<Data, Result, Visitor> : IILVisitor<APC, Dummy, Dummy, Data, Result>
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where Visitor : IILVisitor<APC, Dummy, Dummy, Data, Result> {
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private readonly IMetaDataProvider meta_data_provider;
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private readonly Visitor visitor;
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public RemoveBranchDelegator (Visitor visitor,
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IMetaDataProvider metaDataProvider)
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{
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this.visitor = visitor;
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this.meta_data_provider = metaDataProvider;
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}
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#region IILVisitor<APC,Dummy,Dummy,Data,Result> Members
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public Result Binary (APC pc, BinaryOperator op, Dummy dest, Dummy operand1, Dummy operand2, Data data)
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{
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return this.visitor.Binary (pc, op, dest, operand1, operand2, data);
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}
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public Result Isinst (APC pc, TypeNode type, Dummy dest, Dummy obj, Data data)
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{
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return this.visitor.Isinst (pc, type, dest, obj, data);
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}
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public Result LoadNull (APC pc, Dummy dest, Data polarity)
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{
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return this.visitor.LoadNull (pc, dest, polarity);
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}
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public Result LoadConst (APC pc, TypeNode type, object constant, Dummy dest, Data data)
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{
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return this.visitor.LoadConst (pc, type, constant, dest, data);
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}
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public Result Sizeof (APC pc, TypeNode type, Dummy dest, Data data)
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{
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return this.visitor.Sizeof (pc, type, dest, data);
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}
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public Result Unary (APC pc, UnaryOperator op, bool unsigned, Dummy dest, Dummy source, Data data)
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{
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return this.visitor.Unary (pc, op, unsigned, dest, source, data);
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}
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public Result Entry (APC pc, Method method, Data data)
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{
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return this.visitor.Entry (pc, method, data);
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}
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public Result Assume (APC pc, EdgeTag tag, Dummy condition, Data data)
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{
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if (tag == EdgeTag.Requires && pc.InsideRequiresAtCall || tag == EdgeTag.Invariant && pc.InsideInvariantOnExit)
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return this.visitor.Assert (pc, tag, condition, data);
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return this.visitor.Assume (pc, tag, condition, data);
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}
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public Result Assert (APC pc, EdgeTag tag, Dummy condition, Data data)
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{
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if (pc.InsideEnsuresAtCall)
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return this.visitor.Assume (pc, tag, condition, data);
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return this.visitor.Assert (pc, tag, condition, data);
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}
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public Result BeginOld (APC pc, APC matchingEnd, Data data)
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{
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return this.visitor.BeginOld (pc, matchingEnd, data);
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}
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public Result EndOld (APC pc, APC matchingBegin, TypeNode type, Dummy dest, Dummy source, Data data)
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{
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return this.visitor.EndOld (pc, matchingBegin, type, dest, source, data);
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}
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public Result LoadStack (APC pc, int offset, Dummy dest, Dummy source, bool isOld, Data data)
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{
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return this.visitor.LoadStack (pc, offset, dest, source, isOld, data);
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}
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public Result LoadStackAddress (APC pc, int offset, Dummy dest, Dummy source, TypeNode type, bool isOld, Data data)
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{
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return this.visitor.LoadStackAddress (pc, offset, dest, source, type, isOld, data);
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}
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public Result LoadResult (APC pc, TypeNode type, Dummy dest, Dummy source, Data data)
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{
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return this.visitor.LoadResult (pc, type, dest, source, data);
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}
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public Result Arglist (APC pc, Dummy dest, Data data)
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{
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return this.visitor.Arglist (pc, dest, data);
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}
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public Result Branch (APC pc, APC target, bool leavesExceptionBlock, Data data)
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{
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return this.visitor.Nop (pc, data);
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}
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public Result BranchCond (APC pc, APC target, BranchOperator bop, Dummy value1, Dummy value2, Data data)
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{
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Dummy dest = Dummy.Value;
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switch (bop) {
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case BranchOperator.Beq:
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return this.visitor.Binary (pc, BinaryOperator.Ceq, dest, value1, value2, data);
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case BranchOperator.Bge:
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return this.visitor.Binary (pc, BinaryOperator.Cge, dest, value1, value2, data);
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case BranchOperator.Bge_Un:
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return this.visitor.Binary (pc, BinaryOperator.Cge_Un, dest, value1, value2, data);
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case BranchOperator.Bgt:
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return this.visitor.Binary (pc, BinaryOperator.Cgt, dest, value1, value2, data);
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case BranchOperator.Bgt_Un:
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return this.visitor.Binary (pc, BinaryOperator.Cgt_Un, dest, value1, value2, data);
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case BranchOperator.Ble:
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return this.visitor.Binary (pc, BinaryOperator.Cle, dest, value1, value2, data);
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case BranchOperator.Ble_Un:
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return this.visitor.Binary (pc, BinaryOperator.Cle_Un, dest, value1, value2, data);
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case BranchOperator.Blt:
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return this.visitor.Binary (pc, BinaryOperator.Clt, dest, value1, value2, data);
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case BranchOperator.Blt_Un:
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return this.visitor.Binary (pc, BinaryOperator.Clt_Un, dest, value1, value2, data);
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case BranchOperator.Bne_un:
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return this.visitor.Binary (pc, BinaryOperator.Cne_Un, dest, value1, value2, data);
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default:
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return this.visitor.Nop (pc, data);
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}
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}
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public Result BranchTrue (APC pc, APC target, Dummy cond, Data data)
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{
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return this.visitor.Nop (pc, data);
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}
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public Result BranchFalse (APC pc, APC target, Dummy cond, Data data)
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{
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return this.visitor.Nop (pc, data);
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}
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public Result Break (APC pc, Data data)
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{
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return this.visitor.Break (pc, data);
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}
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public Result Call<TypeList, ArgList> (APC pc, Method method, bool virt, TypeList extraVarargs, Dummy dest, ArgList args, Data data)
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where TypeList : IIndexable<TypeNode>
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where ArgList : IIndexable<Dummy>
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{
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TypeNode declaringType = this.meta_data_provider.DeclaringType (method);
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if (MethodIsReferenceEquals (method, args, declaringType))
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return this.visitor.Binary (pc, BinaryOperator.Ceq, dest, args [0], args [1], data);
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return this.visitor.Call (pc, method, virt, extraVarargs, dest, args, data);
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}
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public Result Calli<TypeList, ArgList> (APC pc, TypeNode returnType, TypeList argTypes, bool instance, Dummy dest, Dummy functionPointer, ArgList args, Data data)
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where TypeList : IIndexable<TypeNode>
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where ArgList : IIndexable<Dummy>
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{
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return this.visitor.Calli (pc, returnType, argTypes, instance, dest, functionPointer, args, data);
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}
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public Result CheckFinite (APC pc, Dummy dest, Dummy source, Data data)
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{
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return this.visitor.CheckFinite (pc, dest, source, data);
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}
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public Result CopyBlock (APC pc, Dummy destAddress, Dummy srcAddress, Dummy len, Data data)
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{
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return this.visitor.CopyBlock (pc, destAddress, srcAddress, len, data);
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}
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public Result EndFilter (APC pc, Dummy decision, Data data)
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{
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return this.visitor.EndFilter (pc, decision, data);
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}
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public Result EndFinally (APC pc, Data data)
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{
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return this.visitor.EndFinally (pc, data);
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}
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public Result Jmp (APC pc, Method method, Data data)
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{
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return this.visitor.Jmp (pc, method, data);
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}
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public Result LoadArg (APC pc, Parameter argument, bool isOld, Dummy dest, Data data)
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{
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return this.visitor.LoadArg (pc, argument, isOld, dest, data);
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}
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public Result LoadArgAddress (APC pc, Parameter argument, bool isOld, Dummy dest, Data data)
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{
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return this.visitor.LoadArgAddress (pc, argument, isOld, dest, data);
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}
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public Result LoadLocal (APC pc, Local local, Dummy dest, Data data)
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{
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return this.visitor.LoadLocal (pc, local, dest, data);
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}
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public Result LoadLocalAddress (APC pc, Local local, Dummy dest, Data data)
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{
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return this.visitor.LoadLocalAddress (pc, local, dest, data);
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}
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public Result LoadElement (APC pc, TypeNode type, Dummy dest, Dummy array, Dummy index, Data data)
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{
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return this.visitor.LoadElement (pc, type, dest, array, index, data);
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}
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public Result LoadField (APC pc, Field field, Dummy dest, Dummy obj, Data data)
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{
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return this.visitor.LoadField (pc, field, dest, obj, data);
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}
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public Result LoadFieldAddress (APC pc, Field field, Dummy dest, Dummy obj, Data data)
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{
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return this.visitor.LoadFieldAddress (pc, field, dest, obj, data);
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}
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public Result LoadLength (APC pc, Dummy dest, Dummy array, Data data)
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{
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return this.visitor.LoadLength (pc, dest, array, data);
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}
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public Result LoadStaticField (APC pc, Field field, Dummy dest, Data data)
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{
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return this.visitor.LoadStaticField (pc, field, dest, data);
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}
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public Result LoadStaticFieldAddress (APC pc, Field field, Dummy dest, Data data)
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{
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return this.visitor.LoadStaticFieldAddress (pc, field, dest, data);
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}
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public Result LoadTypeToken (APC pc, TypeNode type, Dummy dest, Data data)
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{
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return this.visitor.LoadTypeToken (pc, type, dest, data);
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}
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public Result LoadFieldToken (APC pc, Field type, Dummy dest, Data data)
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{
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return this.visitor.LoadFieldToken (pc, type, dest, data);
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}
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public Result LoadMethodToken (APC pc, Method type, Dummy dest, Data data)
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{
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return this.visitor.LoadMethodToken (pc, type, dest, data);
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}
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public Result Nop (APC pc, Data data)
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{
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return this.visitor.Nop (pc, data);
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}
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public Result Pop (APC pc, Dummy source, Data data)
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{
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return this.visitor.Pop (pc, source, data);
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}
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public Result Return (APC pc, Dummy source, Data data)
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{
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return this.visitor.Return (pc, source, data);
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}
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public Result StoreArg (APC pc, Parameter argument, Dummy source, Data data)
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{
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return this.visitor.StoreArg (pc, argument, source, data);
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}
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public Result StoreLocal (APC pc, Local local, Dummy source, Data data)
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{
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return this.visitor.StoreLocal (pc, local, source, data);
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}
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public Result StoreElement (APC pc, TypeNode type, Dummy array, Dummy index, Dummy value, Data data)
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{
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return this.visitor.StoreElement (pc, type, array, index, value, data);
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}
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public Result StoreField (APC pc, Field field, Dummy obj, Dummy value, Data data)
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{
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return this.visitor.StoreField (pc, field, obj, value, data);
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}
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public Result StoreStaticField (APC pc, Field field, Dummy value, Data data)
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{
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return this.visitor.StoreStaticField (pc, field, value, data);
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}
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public Result Switch (APC pc, TypeNode type, IEnumerable<Pair<object, APC>> cases, Dummy value, Data data)
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{
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return this.visitor.Nop (pc, data);
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}
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public Result Box (APC pc, TypeNode type, Dummy dest, Dummy source, Data data)
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{
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return this.visitor.Box (pc, type, dest, source, data);
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}
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public Result ConstrainedCallvirt<TypeList, ArgList> (APC pc, Method method, TypeNode constraint, TypeList extraVarargs, Dummy dest, ArgList args, Data data)
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where TypeList : IIndexable<TypeNode>
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where ArgList : IIndexable<Dummy>
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{
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return this.visitor.ConstrainedCallvirt (pc, method, constraint, extraVarargs, dest, args, data);
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}
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public Result CastClass (APC pc, TypeNode type, Dummy dest, Dummy obj, Data data)
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{
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return this.visitor.CastClass (pc, type, dest, obj, data);
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}
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public Result CopyObj (APC pc, TypeNode type, Dummy destPtr, Dummy sourcePtr, Data data)
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{
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return this.visitor.CopyObj (pc, type, destPtr, sourcePtr, data);
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}
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public Result Initobj (APC pc, TypeNode type, Dummy ptr, Data data)
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{
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return this.visitor.Initobj (pc, type, ptr, data);
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}
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public Result NewArray<ArgList> (APC pc, TypeNode type, Dummy dest, ArgList lengths, Data data) where ArgList : IIndexable<Dummy>
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{
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return this.visitor.NewArray (pc, type, dest, lengths, data);
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}
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public Result NewObj<ArgList> (APC pc, Method ctor, Dummy dest, ArgList args, Data data) where ArgList : IIndexable<Dummy>
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{
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return this.visitor.NewObj (pc, ctor, dest, args, data);
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}
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public Result MkRefAny (APC pc, TypeNode type, Dummy dest, Dummy obj, Data data)
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{
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return this.visitor.MkRefAny (pc, type, dest, obj, data);
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}
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public Result RefAnyType (APC pc, Dummy dest, Dummy source, Data data)
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{
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return this.visitor.RefAnyType (pc, dest, source, data);
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}
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public Result RefAnyVal (APC pc, TypeNode type, Dummy dest, Dummy source, Data data)
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{
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return this.visitor.RefAnyVal (pc, type, dest, source, data);
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}
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public Result Rethrow (APC pc, Data data)
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{
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return this.visitor.Rethrow (pc, data);
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}
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public Result Throw (APC pc, Dummy exception, Data data)
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{
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return this.visitor.Throw (pc, exception, data);
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}
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public Result Unbox (APC pc, TypeNode type, Dummy dest, Dummy obj, Data data)
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{
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return this.visitor.Unbox (pc, type, dest, obj, data);
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}
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public Result UnboxAny (APC pc, TypeNode type, Dummy dest, Dummy obj, Data data)
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{
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return this.visitor.UnboxAny (pc, type, dest, obj, data);
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}
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#endregion
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private bool MethodIsReferenceEquals<ArgList> (Method method, ArgList args, TypeNode declaringType)
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where ArgList : IIndexable<Dummy>
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{
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return args.Count == 2 && this.meta_data_provider.IsStatic (method)
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&& this.meta_data_provider.Equal (declaringType, this.meta_data_provider.System_Object)
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&& this.meta_data_provider.Name (method) == "ReferenceEquals";
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}
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}
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}
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