public void Weave(ILGenerator ilGenerator)
{
var typeofType = typeof(Type);
var typeofObject = typeof(object);
FieldBuilder contractFieldBuilder = null;
LocalBuilder typesArrayLocalBuilder = null;
LocalBuilder tempTypesArrayLocalBuilder = null;
var typeofArrayOfTypes = typeofType.MakeArrayType();
var weavingSettings = aspectWeavingSettings.WeavingSettings;
var getTypeFromHandleMethodInfo = typeofType.GetMethod("GetTypeFromHandle");
var localBuilderRepository = aspectWeavingSettings.LocalBuilderRepository;
typesArrayLocalBuilder = localBuilderRepository.Declare(() => {
return ilGenerator.DeclareLocal(typeofArrayOfTypes);
});
tempTypesArrayLocalBuilder = ilGenerator.DeclareLocal(typeofArrayOfTypes);
ilGenerator.EmitPushInteger(parameters.Length);
ilGenerator.Emit(OpCodes.Newarr, typeofType);
ilGenerator.EmitStoreLocal(tempTypesArrayLocalBuilder);
parameters.ForEach((parameter, i) => {
var isByRef = parameter.IsByRef;
if (isByRef) {
parameter = parameter.GetElementType();
}
ilGenerator.EmitLoadLocal(tempTypesArrayLocalBuilder);
ilGenerator.EmitPushInteger(i);
ilGenerator.Emit(OpCodes.Ldtoken, parameter);
ilGenerator.Emit(OpCodes.Call, getTypeFromHandleMethodInfo);
if (isByRef) {
ilGenerator.Emit(OpCodes.Callvirt, typeofType.GetMethod("MakeByRefType"));
}
ilGenerator.Emit(OpCodes.Stelem_Ref);
});
ilGenerator.EmitLoadLocal(tempTypesArrayLocalBuilder);
ilGenerator.EmitStoreLocal(typesArrayLocalBuilder);
ilGenerator.EmitLoadArg(0);
contractFieldBuilder = weavingSettings.TypeDefinition.GetFieldBuilder(weavingSettings.ContractType);
ilGenerator.Emit(OpCodes.Ldfld, contractFieldBuilder);
ilGenerator.Emit(OpCodes.Callvirt, typeofObject.GetMethod("GetType"));
ilGenerator.Emit(OpCodes.Ldstr, method.Name);
ilGenerator.EmitLoadLocal(typesArrayLocalBuilder);
ilGenerator.Emit(OpCodes.Callvirt, typeofType.GetMethod("GetMethod", new[] { typeof(string), typeof(Type[]) }));
ilGenerator.EmitStoreLocal(methodLocalBuilder);
}
public void Weave(ILGenerator ilGenerator)
{
var typeofException = typeof(Exception);
LocalBuilder exceptionLocalBuilder = null;
var typeofFlowBehavior = typeof(FlowBehavior);
LocalBuilder flowBehavoiurLocalBuilder = null;
var afterRethrowLabel = ilGenerator.DefineLabel();
var throwFlowBehaviorLabel = ilGenerator.DefineLabel();
var rethrowFlowBehaviorLabel = ilGenerator.DefineLabel();
var argsImplLocalBuilder = localBuilderRepository.Get(aspectArgumentType);
var jumpTable = new[] { throwFlowBehaviorLabel, rethrowFlowBehaviorLabel };
var setExceptionMethodInfo = aspectArgumentType.GetProperty("Exception").GetSetMethod();
var flowBehaviorMethodInfo = aspectArgumentType.GetProperty("FlowBehavior").GetGetMethod();
exceptionLocalBuilder = localBuilderRepository.GetOrDeclare(typeofException, () => {
return ilGenerator.DeclareLocal(typeofException);
});
flowBehavoiurLocalBuilder = localBuilderRepository.GetOrDeclare(typeofFlowBehavior, () => {
return ilGenerator.DeclareLocal(typeofFlowBehavior);
});
ilGenerator.BeginCatchBlock(typeofException);
ilGenerator.EmitStoreLocal(exceptionLocalBuilder);
ilGenerator.EmitLoadLocal(argsImplLocalBuilder);
ilGenerator.EmitLoadLocal(exceptionLocalBuilder);
ilGenerator.Emit(OpCodes.Callvirt, setExceptionMethodInfo);
catchWeavers.ForEach(weaver => weaver.Weave(ilGenerator));
ilGenerator.EmitLoadLocal(argsImplLocalBuilder);
ilGenerator.Emit(OpCodes.Callvirt, flowBehaviorMethodInfo);
ilGenerator.EmitStoreLocal(flowBehavoiurLocalBuilder);
ilGenerator.EmitLoadLocal(flowBehavoiurLocalBuilder);
ilGenerator.EmitPushInteger(1);
ilGenerator.Emit(OpCodes.Sub);
ilGenerator.Emit(OpCodes.Switch, jumpTable);
ilGenerator.Emit(OpCodes.Br_S, afterRethrowLabel);
ilGenerator.MarkLabel(throwFlowBehaviorLabel);
ilGenerator.EmitLoadLocal(exceptionLocalBuilder);
ilGenerator.Emit(OpCodes.Throw);
ilGenerator.MarkLabel(rethrowFlowBehaviorLabel);
ilGenerator.Emit(OpCodes.Rethrow);
ilGenerator.MarkLabel(afterRethrowLabel);
}