public AroundInstructionWeaver(IInstructionDescription description, MethodDefinition method, AroundAdvice advice, int priority)
: base(method, advice, priority)
{
instruction = description.Instruction;
originalOperand = description.Instruction.Operand;
this.description = description;
}
public override void Weave()
{
if (instruction != null)
{
iDescriptor = InstructionDescriptor.Instance.GetDescription(instruction);
}
var start = il.Create(OpCodes.Nop);
var startFinally = il.Create(OpCodes.Nop);
var end = il.Create(OpCodes.Nop);
SplitInstructions();
il.AppendAll(beforeInstructions);
AppendProlog();
il.Append(start);
il.AppendAll(affectedInstructions);
il.Append(OpCodes.Leave_S, end);
il.Append(startFinally);
AppendEpilog();
il.Append(OpCodes.Endfinally);
il.Append(end);
il.AppendAll(afterInstructions);
var handler = new ExceptionHandler(ExceptionHandlerType.Finally)
{
TryStart = start,
TryEnd = startFinally,
HandlerStart = startFinally,
HandlerEnd = end
};
method.Body.ExceptionHandlers.Add(handler);
}
