private void DetermineExceptionHandlingStatesFromCFGBlocks()
{
V_0 = this.theDisposeCFG.get_Blocks();
V_1 = 0;
while (V_1 < (int)V_0.Length)
{
V_2 = V_0[V_1];
if (this.IsBeqInstruction(V_2.get_Last()) || this.IsBneUnInstruction(V_2.get_Last()) && StateMachineUtilities.TryGetOperandOfLdc(V_2.get_Last().get_Previous(), out V_3))
{
V_4 = null;
if (!this.IsBeqInstruction(V_2.get_Last()))
{
V_4 = V_2.get_Last().get_Next();
}
else
{
V_4 = V_2.get_Last().get_Operand() as Instruction;
}
if (V_4 == null)
{
throw new Exception("branchTargetInstruction cannot be null.");
}
if (this.TryGetExceptionHandler(StateMachineDisposeAnalyzer.SkipSingleNopInstructionBlock(this.theDisposeCFG.get_InstructionToBlockMapping().get_Item(V_4.get_Offset())), out V_6))
{
if (!this.handlerToStatesMap.ContainsKey(V_6))
{
this.handlerToStatesMap.Add(V_6, new HashSet <int>());
}
dummyVar0 = this.handlerToStatesMap.get_Item(V_6).Add(V_3);
}
}
V_1 = V_1 + 1;
}
return;
}
protected override bool ProcessCFG()
{
StateMachineDisposeAnalyzer disposeAnalyzer = new StateMachineDisposeAnalyzer(moveNextMethodContext.Method);
StateControllerRemover controllerRemover;
YieldStateMachineVersion machineVersion = disposeAnalyzer.ProcessDisposeMethod();
if (machineVersion == YieldStateMachineVersion.V1)
{
controllerRemover = new StateControllerRemover(moveNextMethodContext);
}
else if (machineVersion == YieldStateMachineVersion.V2)
{
controllerRemover = new DisposingStateControllerRemover(moveNextMethodContext, disposeAnalyzer.StateField, disposeAnalyzer.DisposingField);
StateMachineDoFinallyCheckRemover doFinallyCheckRemover = new StateMachineDoFinallyCheckRemover(moveNextMethodContext);
if (!doFinallyCheckRemover.MarkFinallyConditionsForRemoval())
{
return false;
}
toBeRemoved.UnionWith(doFinallyCheckRemover.BlocksMarkedForRemoval);
}
else
{
return false;
}
if (!controllerRemover.RemoveStateMachineController())
{
return false;
}
toBeRemoved.UnionWith(controllerRemover.BlocksMarkedForRemoval);
SwitchData switchData = controllerRemover.SwitchData;
YieldStateMachineControlFlowRebuilder controlFlowRebuilder =
new YieldStateMachineControlFlowRebuilder(moveNextMethodContext, switchData, controllerRemover.StateField);
if (!controlFlowRebuilder.ProcessEndBlocks())
{
return false;
}
toBeRemoved.UnionWith(controlFlowRebuilder.BlocksMarkedForRemoval);
StateMachineCFGCleaner cfgCleaner = new StateMachineCFGCleaner(theCFG, switchData, switchData.OrderedCasesArray[0]);
if (!cfgCleaner.CleanUpTheCFG(toBeRemoved))
{
return false;
}
YieldFieldsInformation fieldsInfo = new YieldFieldsInformation(controllerRemover.StateField,
controlFlowRebuilder.CurrentItemField, controlFlowRebuilder.ReturnFlagVariable);
this.moveNextMethodContext.YieldData =
new YieldData(machineVersion, controlFlowRebuilder.YieldReturnBlocks,
controlFlowRebuilder.YieldBreakBlocks, fieldsInfo, disposeAnalyzer.YieldsExceptionData);
return true;
}
private InstructionBlock GetActualCase(InstructionBlock theBlock)
{
while ((object)theBlock.get_First() == (object)theBlock.get_Last() && theBlock.get_First().get_OpCode().get_Code() == 55 || theBlock.get_First().get_OpCode().get_Code() == 42)
{
V_0 = theBlock.get_First().get_Operand() as Instruction;
theBlock = this.theDisposeCFG.get_InstructionToBlockMapping().get_Item(V_0.get_Offset());
}
theBlock = StateMachineDisposeAnalyzer.SkipSingleNopInstructionBlock(theBlock);
return(theBlock);
}