UntangleProcedures() public method

Finds all interprocedural register dependencies (in- and out-parameters) and abstracts them away by rewriting as calls.
public UntangleProcedures ( ) : void
return void
		private void PerformTest(FileUnitTester fut)
		{
			DataFlowAnalysis dfa = new DataFlowAnalysis(program, null, new FakeDecompilerEventListener());
			dfa.UntangleProcedures();
			foreach (Procedure proc in program.Procedures.Values)
			{
				Aliases alias = new Aliases(proc, program.Architecture);
				alias.Transform();
				SsaTransform sst = new SsaTransform(
                    dfa.ProgramDataFlow,
                    proc,
                    null,
                    proc.CreateBlockDominatorGraph(),
                    program.Platform.CreateImplicitArgumentRegisters());
				SsaState ssa = sst.SsaState;

				proc.Write(false, fut.TextWriter);
				fut.TextWriter.WriteLine();

				OutParameterTransformer opt = new OutParameterTransformer(proc, ssa.Identifiers);
				opt.Transform();

				DeadCode.Eliminate(proc, ssa);

				proc.Write(false, fut.TextWriter);
				fut.TextWriter.WriteLine("====================");
			}
		}
        protected override void RunTest(Program prog, TextWriter writer)
        {
            DataFlowAnalysis dfa = new DataFlowAnalysis(prog, new FakeDecompilerEventListener());
            dfa.UntangleProcedures();
            foreach (Procedure proc in prog.Procedures.Values)
            {
                var larw = new LongAddRewriter(proc, prog.Architecture);
                larw.Transform();

                Aliases alias = new Aliases(proc, prog.Architecture, dfa.ProgramDataFlow);
                alias.Transform();
                var sst = new SsaTransform(dfa.ProgramDataFlow, proc, proc.CreateBlockDominatorGraph());
                SsaState ssa = sst.SsaState;

                proc.Dump(true);

                var vp = new ValuePropagator(ssa.Identifiers, proc);
                vp.Transform();

                var cce = new ConditionCodeEliminator(ssa.Identifiers, prog.Platform);
                cce.Transform();
                DeadCode.Eliminate(proc, ssa);

                ssa.Write(writer);
                proc.Write(false, writer);
                writer.WriteLine();
            }
        }
Esempio n. 3
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		protected override void RunTest(Program prog, TextWriter writer)
		{
			var dfa = new DataFlowAnalysis(prog, new FakeDecompilerEventListener());
			dfa.UntangleProcedures();
			foreach (Procedure proc in prog.Procedures.Values)
			{
				writer.WriteLine("= {0} ========================", proc.Name);
				var gr = proc.CreateBlockDominatorGraph();
				Aliases alias = new Aliases(proc, prog.Architecture);
				alias.Transform();
				SsaTransform sst = new SsaTransform(dfa.ProgramDataFlow, proc, gr);
				SsaState ssa = sst.SsaState;
                var cce = new ConditionCodeEliminator(ssa.Identifiers, prog.Platform);
                cce.Transform();
				ssa.Write(writer);
				proc.Write(false, writer);
				writer.WriteLine();

				ValuePropagator vp = new ValuePropagator(ssa.Identifiers, proc);
				vp.Transform();

				ssa.Write(writer);
				proc.Write(false, writer);
			}
		}
Esempio n. 4
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		protected override void RunTest(Program program, TextWriter writer)
		{
            var importResolver = MockRepository.GenerateStub<IImportResolver>();
            importResolver.Replay();
            var dfa = new DataFlowAnalysis(program, importResolver, new FakeDecompilerEventListener());
			dfa.UntangleProcedures();
			foreach (Procedure proc in program.Procedures.Values)
			{
				Aliases alias = new Aliases(proc, program.Architecture);
				alias.Transform();
				SsaTransform sst = new SsaTransform(
                    dfa.ProgramDataFlow,
                    proc,
                    importResolver,
                    proc.CreateBlockDominatorGraph(),
                    new HashSet<RegisterStorage>());
				SsaState ssa = sst.SsaState;
				GrfDefinitionFinder grfd = new GrfDefinitionFinder(ssa.Identifiers);
				foreach (SsaIdentifier sid in ssa.Identifiers)
				{
                    var id = sid.OriginalIdentifier as Identifier;
					if (id == null || !(id.Storage is FlagGroupStorage) || sid.Uses.Count == 0)
						continue;
					writer.Write("{0}: ", sid.DefStatement.Instruction);
					grfd.FindDefiningExpression(sid);
					string fmt = grfd.IsNegated ? "!{0};" : "{0}";
					writer.WriteLine(fmt, grfd.DefiningExpression);
				}
			}
		}
Esempio n. 5
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		private void Build(Program prog)
		{
            var eventListener = new FakeDecompilerEventListener();
            DataFlowAnalysis dfa = new DataFlowAnalysis(prog, null, eventListener);
			dfa.UntangleProcedures();
			foreach (Procedure proc in prog.Procedures.Values)
			{
				Aliases alias = new Aliases(proc, prog.Architecture);
				alias.Transform();
				var gr = proc.CreateBlockDominatorGraph();
				SsaTransform sst = new SsaTransform(dfa.ProgramDataFlow, proc, null, gr, new HashSet<RegisterStorage>());
				SsaState ssa = sst.SsaState;

				ConditionCodeEliminator cce = new ConditionCodeEliminator(ssa, prog.Platform);
				cce.Transform();

				DeadCode.Eliminate(proc, ssa);

				var vp = new ValuePropagator(prog.Architecture, ssa);
				vp.Transform();

				DeadCode.Eliminate(proc, ssa);

				Coalescer coa = new Coalescer(proc, ssa);
				coa.Transform();

				DeadCode.Eliminate(proc, ssa);

				LiveCopyInserter lci = new LiveCopyInserter(proc, ssa.Identifiers);
				lci.Transform();

				WebBuilder web = new WebBuilder(proc, ssa.Identifiers, new Dictionary<Identifier,LinearInductionVariable>());
				web.Transform();

				ssa.ConvertBack(false);
			}

		}
Esempio n. 6
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		protected override void RunTest(Program program, TextWriter writer)
		{
			DataFlowAnalysis dfa = new DataFlowAnalysis(program, null,  new FakeDecompilerEventListener());
			dfa.UntangleProcedures();
			foreach (Procedure proc in program.Procedures.Values)
			{
				Aliases alias = new Aliases(proc, program.Architecture);
				alias.Transform();
				SsaTransform sst = new SsaTransform(
                    dfa.ProgramDataFlow,
                    proc,
                    null,
                    proc.CreateBlockDominatorGraph(),
                    program.Platform.CreateImplicitArgumentRegisters());
				SsaState ssa = sst.SsaState;
				ConditionCodeEliminator cce = new ConditionCodeEliminator(ssa, program.Platform);
				cce.Transform();

				DeadCode.Eliminate(proc, ssa);
				ssa.Write(writer);
				proc.Write(false, writer);
			}
		}
Esempio n. 7
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        protected override void RunTest(Program program, TextWriter writer)
        {
            var importResolver = MockRepository.GenerateStub<IImportResolver>();
            DataFlowAnalysis dfa = new DataFlowAnalysis(program, importResolver, new FakeDecompilerEventListener());
            dfa.UntangleProcedures();
            foreach (Procedure proc in program.Procedures.Values)
            {
                var larw = new LongAddRewriter(proc, program.Architecture);
                larw.Transform();

                Aliases alias = new Aliases(proc, program.Architecture, dfa.ProgramDataFlow);
                alias.Transform();
                var sst = new SsaTransform(dfa.ProgramDataFlow, proc, importResolver, proc.CreateBlockDominatorGraph(), new HashSet<RegisterStorage>());
                SsaState ssa = sst.SsaState;

                var cce = new ConditionCodeEliminator(ssa, program.Platform);
                cce.Transform();

                var vp = new ValuePropagator(program.Architecture, ssa);
                vp.Transform();

                DeadCode.Eliminate(proc, ssa);

                ssa.Write(writer);
                proc.Write(false, writer);
                writer.WriteLine();
            }
        }
Esempio n. 8
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		protected override void RunTest(Program prog, TextWriter fut)
		{
			DataFlowAnalysis dfa = new DataFlowAnalysis(prog, new FakeDecompilerEventListener());
			dfa.UntangleProcedures();
			
			foreach (Procedure proc in prog.Procedures.Values)
			{
				Aliases alias = new Aliases(proc, prog.Architecture);
				alias.Transform();
				SsaTransform sst = new SsaTransform(dfa.ProgramDataFlow, proc, proc.CreateBlockDominatorGraph());
				SsaState ssa = sst.SsaState;
				
                ConditionCodeEliminator cce = new ConditionCodeEliminator(ssa.Identifiers, prog.Platform);
				cce.Transform();
				DeadCode.Eliminate(proc, ssa);

				ValuePropagator vp = new ValuePropagator(ssa.Identifiers, proc);
				vp.Transform();
				DeadCode.Eliminate(proc, ssa);
				Coalescer co = new Coalescer(proc, ssa);
				co.Transform();

				ssa.Write(fut);
				proc.Write(false, fut);
				fut.WriteLine();
			}
		}
Esempio n. 9
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        ///<summary>
        /// Determines the signature of the procedures,
        /// the locations and types of all the values in the program.
        ///</summary>
        public virtual void AnalyzeDataFlow()
        {
            foreach (var program in project.Programs)
            {
                eventListener.ShowStatus("Performing interprocedural analysis.");
                var dfa = new DataFlowAnalysis(program, eventListener);
                dfa.UntangleProcedures();

                dfa.BuildExpressionTrees();
                host.WriteIntermediateCode(program, writer => { EmitProgram(program, dfa, writer); });
            }
            eventListener.ShowStatus("Interprocedural analysis complete.");
        }
Esempio n. 10
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        protected override void RunTest(Program program, TextWriter fut)
        {
            InitProgram(program);
            IImportResolver importResolver = null;
            var eventListener = new FakeDecompilerEventListener();
            DataFlowAnalysis dfa = new DataFlowAnalysis(
                program,
                importResolver,
                eventListener);
            dfa.UntangleProcedures();

            foreach (Procedure proc in program.Procedures.Values)
            {
                SsaTransform sst = new SsaTransform(
                    dfa.ProgramDataFlow,
                    proc,
                    importResolver,
                    proc.CreateBlockDominatorGraph(),
                    new HashSet<RegisterStorage>());
                SsaState ssa = sst.SsaState;

                var icrw = new IndirectCallRewriter(
                    program,
                    ssa,
                    eventListener);
                icrw.Rewrite();

                ssa.Write(fut);
                proc.Write(false, fut);
                fut.WriteLine();
            }
        }
Esempio n. 11
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        ///<summary>
        /// Determines the signature of the procedures,
		/// the locations and types of all the values in the program.
		///</summary>
        public virtual void AnalyzeDataFlow()
        {
            var eventListener = services.RequireService<DecompilerEventListener>();
            foreach (var program in project.Programs)
            {
                eventListener.ShowStatus("Performing interprocedural analysis.");
                var ir = new ImportResolver(project, program, eventListener);
                var dfa = new DataFlowAnalysis(program, ir, eventListener);
                dfa.UntangleProcedures();

                dfa.BuildExpressionTrees();
                host.WriteIntermediateCode(program, writer => { EmitProgram(program, dfa, writer); });
            }
            eventListener.ShowStatus("Interprocedural analysis complete.");
        }
Esempio n. 12
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        protected override void RunTest(Program prog, TextWriter writer)
		{
			dfa = new DataFlowAnalysis(prog, null, new FakeDecompilerEventListener());
			dfa.UntangleProcedures();
			foreach (Procedure proc in prog.Procedures.Values)
			{
				ProcedureFlow flow = dfa.ProgramDataFlow[proc];
				proc.Signature.Emit(proc.Name, FunctionType.EmitFlags.ArgumentKind, new TextFormatter(writer));
				writer.WriteLine();
				flow.Emit(prog.Architecture, writer);
				proc.Write(true, writer);
				writer.Flush();
			}
		}