public void GenerateCFG(MethodDefinition method)
{
var methodInfo = programInfo.GetOrAdd(method);
//GenerateIL(method);
GenerateTAC(method);
if (!methodInfo.Contains("CFG"))
{
// Control-flow
var cfAnalysis = new ControlFlowAnalysis(method.Body);
var cfg = cfAnalysis.GenerateNormalControlFlow();
//var cfg = cfAnalysis.GenerateExceptionalControlFlow();
var domAnalysis = new DominanceAnalysis(cfg);
domAnalysis.Analyze();
domAnalysis.GenerateDominanceTree();
//// Optional
//var loopAnalysis = new NaturalLoopAnalysis(cfg);
//loopAnalysis.Analyze();
var domFrontierAnalysis = new DominanceFrontierAnalysis(cfg);
domFrontierAnalysis.Analyze();
var pdomAnalysis = new PostDominanceAnalysis(cfg);
pdomAnalysis.Analyze();
pdomAnalysis.GeneratePostDominanceTree();
var pdomFrontierAnalysis = new PostDominanceFrontierAnalysis(cfg);
pdomFrontierAnalysis.Analyze();
var controlDependenceAnalysis = new ControlDependenceAnalysis(cfg);
controlDependenceAnalysis.Analyze();
var text = DGMLSerializer.Serialize(cfg);
methodInfo.Add("CFG", cfg);
methodInfo.Add("CFG_TEXT", text);
text = DGMLSerializer.SerializeDominanceTree(cfg);
methodInfo.Add("DT_TEXT", text);
text = DGMLSerializer.SerializePostDominanceTree(cfg);
methodInfo.Add("PDT_TEXT", text);
text = DGMLSerializer.SerializeControlDependenceGraph(cfg);
methodInfo.Add("CDG_TEXT", text);
}
}
//string _code = String.Empty;
/// <summary>
/// For a given methodDefinition, create a CFG and run basic analyses such as
/// stack removal, SSA transformation, live-variables analysis, and copy-propagation.
/// </summary>
/// <param name="methodDefinition"></param>
/// <returns></returns>
private ControlFlowGraph PrepareMethod(IMethodDefinition methodDefinition)
{
var sw2 = new Stopwatch();
sw2.Start();
var disassembler = new Disassembler(mhost, methodDefinition, sourceLocationProvider);
var methodBody = disassembler.Execute();
var cfAnalysis = new ControlFlowAnalysis(methodBody);
var cfg = cfAnalysis.GenerateNormalControlFlow();
var domAnalysis = new DominanceAnalysis(cfg);
domAnalysis.Analyze();
domAnalysis.GenerateDominanceTree();
var loopAnalysis = new NaturalLoopAnalysis(cfg);
loopAnalysis.Analyze();
var domFrontierAnalysis = new DominanceFrontierAnalysis(cfg);
domFrontierAnalysis.Analyze();
var splitter = new WebAnalysis(cfg, methodDefinition);
splitter.Analyze();
splitter.Transform();
methodBody.UpdateVariables();
var analysis = new TypeInferenceAnalysis(cfg, methodBody.MethodDefinition.Type);
analysis.Analyze();
var copyProgapagtion = new ForwardCopyPropagationAnalysis(cfg);
copyProgapagtion.Analyze();
copyProgapagtion.Transform(methodBody);
var backwardCopyProgapagtion = new BackwardCopyPropagationAnalysis(cfg);
backwardCopyProgapagtion.Analyze();
backwardCopyProgapagtion.Transform(methodBody);
var liveVariables = new LiveVariablesAnalysis(cfg);
var resultLiveVar = liveVariables.Analyze();
var ssa = new StaticSingleAssignment(methodBody, cfg);
ssa.Transform();
ssa.Prune(liveVariables);
methodBody.UpdateVariables();
sw2.Stop();
this.nonAnalysisOverhead = sw2.Elapsed;
return(cfg);
//var cfg = ControlFlowGraph.GenerateNormalControlFlow(methodBody);
//ControlFlowGraph.ComputeDominators(cfg);
//ControlFlowGraph.IdentifyLoops(cfg);
//ControlFlowGraph.ComputeDominatorTree(cfg);
//ControlFlowGraph.ComputeDominanceFrontiers(cfg);
//// Uniquely rename stack variables.
//var splitter = new WebAnalysis(cfg);
//splitter.Analyze();
//splitter.Transform();
//methodBody.UpdateVariables();
//// Infer types for stack variables.
//var typeAnalysis = new TypeInferenceAnalysis(cfg);
//typeAnalysis.Analyze();
//var backwardCopyAnalysis = new BackwardCopyPropagationAnalysis(cfg);
//backwardCopyAnalysis.Analyze();
//backwardCopyAnalysis.Transform(methodBody);
//var lva = new LiveVariablesAnalysis(cfg);
//lva.Analyze();
//var ssa = new StaticSingleAssignmentAnalysis(methodBody, cfg);
//ssa.Transform();
//ssa.Prune(lva);
//methodBody.UpdateVariables();
////_code = methodBody.ToString();
//return cfg;
}
public MethodCfgAndTac AnalyzeIntraProcedural(IMethodDefinition methodDefinition)
{
// System.Console.WriteLine("Traversing: {0}", methodDefinition.GetName());
if (Stubber.SuppressM(methodDefinition))
{
return(null);
}
if (methodDefinition.IsExternal)
{
return(null);
}
if (methodDefinition.IsAbstract)
{
return(null);
}
ITypeDefinition containingDefn = methodDefinition.ContainingTypeDefinition;
ISourceLocationProvider sourceLocationProvider = null;
if (containingDefn != null)
{
IModule mod = TypeHelper.GetDefiningUnit(containingDefn) as IModule;
if (moduleToPdbMap.ContainsKey(mod))
{
sourceLocationProvider = moduleToPdbMap[mod];
}
else
{
if (!(mod == null || mod == Dummy.Module || mod == Dummy.Assembly))
{
sourceLocationProvider = GetPdbReader(mod.Location);
moduleToPdbMap[mod] = sourceLocationProvider;
}
}
}
var disassembler = new Disassembler(host, methodDefinition, sourceLocationProvider);
var methodBody = disassembler.Execute();
var cfAnalysis = new ControlFlowAnalysis(methodBody);
// var cfg = cfAnalysis.GenerateNormalControlFlow();
var cfg = cfAnalysis.GenerateExceptionalControlFlow();
var domAnalysis = new DominanceAnalysis(cfg);
domAnalysis.Analyze();
domAnalysis.GenerateDominanceTree();
var loopAnalysis = new NaturalLoopAnalysis(cfg);
loopAnalysis.Analyze();
var domFrontierAnalysis = new DominanceFrontierAnalysis(cfg);
domFrontierAnalysis.Analyze();
var splitter = new WebAnalysis(cfg, methodDefinition);
splitter.Analyze();
splitter.Transform();
methodBody.UpdateVariables();
var typeAnalysis = new TypeInferenceAnalysis(cfg, methodDefinition.Type);
typeAnalysis.Analyze();
var forwardCopyAnalysis = new ForwardCopyPropagationAnalysis(cfg);
forwardCopyAnalysis.Analyze();
forwardCopyAnalysis.Transform(methodBody);
// backwardCopyAnalysis is buggy - it says so in the source file - see notes in src/test
// var backwardCopyAnalysis = new BackwardCopyPropagationAnalysis(cfg);
// backwardCopyAnalysis.Analyze();
// backwardCopyAnalysis.Transform(methodBody);
var liveVariables = new LiveVariablesAnalysis(cfg);
liveVariables.Analyze();
var ssa = new StaticSingleAssignment(methodBody, cfg);
ssa.Transform();
ssa.Prune(liveVariables);
methodBody.UpdateVariables();
MethodCfgAndTac mct = new MethodCfgAndTac(cfg, methodBody);
foreach (IExceptionHandlerBlock ehInfo in disassembler.GetExceptionHandlers())
{
if (ehInfo is CatchExceptionHandler)
{
mct.ehInfoList.Add(ehInfo as CatchExceptionHandler);
}
}
return(mct);
}
public static ControlFlowGraph DoAnalysisPhases(this IMethodDefinition method, IMetadataHost host, ISourceLocationProvider locationProvider,
IEnumerable <IMethodReference> methodsToTryToInline = null)
{
AnalysisStats.extraAnalysisOverHead.Start();
var disassembler = new Disassembler(host, method, locationProvider);
var methodBody = disassembler.Execute();
MethodBodyProvider.Instance.AddBody(method, methodBody);
if (methodsToTryToInline != null)
{
DoInlining(method, host, methodBody, locationProvider, methodsToTryToInline);
}
var cfAnalysis = new ControlFlowAnalysis(methodBody);
//var cfg = cfAnalysis.GenerateExceptionalControlFlow();
var cfg = cfAnalysis.GenerateNormalControlFlow();
var domAnalysis = new DominanceAnalysis(cfg);
domAnalysis.Analyze();
domAnalysis.GenerateDominanceTree();
var loopAnalysis = new NaturalLoopAnalysis(cfg);
loopAnalysis.Analyze();
var domFrontierAnalysis = new DominanceFrontierAnalysis(cfg);
domFrontierAnalysis.Analyze();
var splitter = new WebAnalysis(cfg, method);
splitter.Analyze();
splitter.Transform();
methodBody.UpdateVariables();
var analysis = new TypeInferenceAnalysis(cfg, methodBody.MethodDefinition.Type);
analysis.Analyze();
var copyProgapagtion = new ForwardCopyPropagationAnalysis(cfg);
copyProgapagtion.Analyze();
copyProgapagtion.Transform(methodBody);
//var backwardCopyProgapagtion = new BackwardCopyPropagationAnalysis(cfg);
//backwardCopyProgapagtion.Analyze();
//backwardCopyProgapagtion.Transform(methodBody);
var liveVariables = new LiveVariablesAnalysis(cfg);
var resultLiveVar = liveVariables.Analyze();
var ssa = new StaticSingleAssignment(methodBody, cfg);
ssa.Transform();
ssa.Prune(liveVariables);
methodBody.UpdateVariables();
AnalysisStats.extraAnalysisOverHead.Stop();
return(cfg);
}
