protected virtual void WriteInterceptorInvocationMethod(MethodInfo method, EasyMethod builder)
{
ArgumentReference[] arguments = builder.Arguments;
TypeReference[] args = IndirectReference.WrapIfByRef(builder.Arguments);
LocalReference target = builder.CodeBuilder.DeclareLocal(this.Context.Invocation);
EasyCallable callable = this._method2Delegate[method] as EasyCallable;
FieldReference reference2 = this.ObtainCallableFieldBuilderDelegate(callable);
builder.CodeBuilder.AddStatement(new AssignStatement(target, new MethodInvocationExpression(this._method2Invocation, new Expression[] { reference2.ToExpression(), new MethodTokenExpression(this.GetCorrectMethod(method)), this.GetPseudoInvocationTarget(method) })));
LocalReference reference3 = builder.CodeBuilder.DeclareLocal(typeof(object));
LocalReference reference4 = builder.CodeBuilder.DeclareLocal(typeof(object[]));
builder.CodeBuilder.AddStatement(new AssignStatement(reference4, new ReferencesToObjectArrayExpression(args)));
builder.CodeBuilder.AddStatement(new AssignStatement(reference3, new VirtualMethodInvocationExpression(this.InterceptorField, this.Context.Interceptor.GetMethod("Intercept"), new Expression[] { target.ToExpression(), reference4.ToExpression() })));
for (int i = 0; i < arguments.Length; i++)
{
if (arguments[i].Type.IsByRef)
{
builder.CodeBuilder.AddStatement(new AssignStatement(args[i], new ConvertExpression(args[i].Type, new LoadRefArrayElementExpression(i, reference4))));
}
}
if (builder.ReturnType == typeof(void))
{
builder.CodeBuilder.AddStatement(new ReturnStatement());
}
else
{
builder.CodeBuilder.AddStatement(new ReturnStatement(new ConvertExpression(builder.ReturnType, reference3.ToExpression())));
}
}
/// <summary>
/// Writes the method implementation. This
/// method generates the IL code for property get/set method and
/// ordinary methods.
/// </summary>
/// <param name="method">The method to implement.</param>
/// <param name="builder"><see cref="EasyMethod"/> being constructed.</param>
protected virtual void WriteInterceptorInvocationMethod(MethodInfo method, EasyMethod builder)
{
ArgumentReference[] arguments = builder.Arguments;
TypeReference[] dereferencedArguments = IndirectReference.WrapIfByRef(builder.Arguments);
LocalReference local_inv = builder.CodeBuilder.DeclareLocal(Context.Invocation);
EasyCallable callable = _method2Delegate[method] as EasyCallable;
FieldReference fieldDelegate = ObtainCallableFieldBuilderDelegate(callable);
builder.CodeBuilder.AddStatement(
new AssignStatement(local_inv,
new MethodInvocationExpression(_method2Invocation,
fieldDelegate.ToExpression(),
new MethodTokenExpression(GetCorrectMethod(method)),
GetPseudoInvocationTarget(method))));
LocalReference ret_local = builder.CodeBuilder.DeclareLocal(typeof(object));
LocalReference args_local = builder.CodeBuilder.DeclareLocal(typeof(object[]));
// Store arguments into an object array.
builder.CodeBuilder.AddStatement(
new AssignStatement(args_local,
new ReferencesToObjectArrayExpression(dereferencedArguments)));
// Invoke the interceptor.
builder.CodeBuilder.AddStatement(
new AssignStatement(ret_local,
new VirtualMethodInvocationExpression(InterceptorField,
Context.Interceptor.GetMethod("Intercept"),
local_inv.ToExpression(),
args_local.ToExpression())));
// Load possibly modified ByRef arguments from the array.
for (int i = 0; i < arguments.Length; i++)
{
if (arguments[i].Type.IsByRef)
{
builder.CodeBuilder.AddStatement(
new AssignStatement(dereferencedArguments[i],
new ConvertExpression(dereferencedArguments[i].Type,
new LoadRefArrayElementExpression(i, args_local))));
}
}
if (builder.ReturnType == typeof(void))
{
builder.CodeBuilder.AddStatement(new ReturnStatement());
}
else
{
builder.CodeBuilder.AddStatement(new ReturnStatement(
new ConvertExpression(builder.ReturnType, ret_local.ToExpression())));
}
}
private void GenerateCall()
{
ArgumentReference arrayReference = new ArgumentReference(typeof(object[]));
this._callmethod = base.CreateMethod("Call", new ReturnReferenceExpression(typeof(object)), new ArgumentReference[] { arrayReference });
TypeReference[] referenceArray = IndirectReference.WrapIfByRef(this._args);
LocalReference[] referenceArray2 = new LocalReference[this._args.Length];
Expression[] args = new Expression[this._args.Length];
for (int i = 0; i < this._args.Length; i++)
{
if (this._args[i].Type.IsByRef)
{
referenceArray2[i] = this._callmethod.CodeBuilder.DeclareLocal(referenceArray[i].Type);
this._callmethod.CodeBuilder.AddStatement(new AssignStatement(referenceArray2[i], new ConvertExpression(referenceArray[i].Type, new LoadRefArrayElementExpression(i, arrayReference))));
args[i] = referenceArray2[i].ToAddressOfExpression();
}
else
{
args[i] = new ConvertExpression(referenceArray[i].Type, new LoadRefArrayElementExpression(i, arrayReference));
}
}
MethodInvocationExpression expression = new MethodInvocationExpression(this._invokeMethod, args);
Expression instance = null;
if (this._returnType.Type == typeof(void))
{
this._callmethod.CodeBuilder.AddStatement(new ExpressionStatement(expression));
instance = NullExpression.Instance;
}
else
{
LocalReference target = this._callmethod.CodeBuilder.DeclareLocal(typeof(object));
this._callmethod.CodeBuilder.AddStatement(new AssignStatement(target, new ConvertExpression(typeof(object), this._returnType.Type, expression)));
instance = target.ToExpression();
}
for (int j = 0; j < this._args.Length; j++)
{
if (this._args[j].Type.IsByRef)
{
this._callmethod.CodeBuilder.AddStatement(new AssignArrayStatement(arrayReference, j, new ConvertExpression(typeof(object), referenceArray[j].Type, referenceArray2[j].ToExpression())));
}
}
this._callmethod.CodeBuilder.AddStatement(new ReturnStatement(instance));
}
protected override MethodEmitter BuildProxiedMethodBody(MethodEmitter emitter, ClassEmitter @class,
ProxyGenerationOptions options, INamingScope namingScope)
{
var invocationType = invocation;
Trace.Assert(MethodToOverride.IsGenericMethod == invocationType.IsGenericTypeDefinition());
var genericArguments = TypeExtender.EmptyTypes;
var constructor = invocation.GetConstructors()[0];
Expression proxiedMethodTokenExpression;
if (MethodToOverride.IsGenericMethod)
{
// bind generic method arguments to invocation's type arguments
genericArguments = emitter.MethodBuilder.GetGenericArguments();
invocationType = invocationType.MakeGenericType(genericArguments);
constructor = TypeBuilder.GetConstructor(invocationType, constructor);
// Not in the cache: generic method
proxiedMethodTokenExpression = new MethodTokenExpression(MethodToOverride.MakeGenericMethod(genericArguments));
}
else
{
var proxiedMethodToken = @class.CreateStaticField(namingScope.GetUniqueName("token_" + MethodToOverride.Name),
typeof(IMethodInfo));
@class.ClassConstructor.CodeBuilder.AddStatement(new AssignStatement(proxiedMethodToken,
new MethodTokenExpression(MethodToOverride)));
proxiedMethodTokenExpression = proxiedMethodToken.ToExpression();
}
var dereferencedArguments = IndirectReference.WrapIfByRef(emitter.Arguments);
var hasByRefArguments = HasByRefArguments(emitter.Arguments);
var arguments = GetCtorArguments(@class, namingScope, proxiedMethodTokenExpression,
dereferencedArguments);
var ctorArguments = ModifyArguments(@class, arguments);
var invocationLocal = emitter.CodeBuilder.DeclareLocal(invocationType);
emitter.CodeBuilder.AddStatement(new AssignStatement(invocationLocal,
new NewInstanceExpression(constructor, ctorArguments)));
if (MethodToOverride.ContainsGenericParameters)
{
EmitLoadGenricMethodArguments(emitter, MethodToOverride.MakeGenericMethod(genericArguments), invocationLocal);
}
if (hasByRefArguments)
{
emitter.CodeBuilder.AddStatement(new TryStatement());
}
var proceed = new ExpressionStatement(new MethodInvocationExpression(invocationLocal, InvocationMethods.Proceed));
emitter.CodeBuilder.AddStatement(proceed);
if (hasByRefArguments)
{
emitter.CodeBuilder.AddStatement(new FinallyStatement());
}
GeneratorUtil.CopyOutAndRefParameters(dereferencedArguments, invocationLocal, MethodToOverride, emitter);
if (hasByRefArguments)
{
emitter.CodeBuilder.AddStatement(new EndExceptionBlockStatement());
}
if (MethodToOverride.ReturnType != typeof(void))
{
var getRetVal = new MethodInvocationExpression(invocationLocal, InvocationMethods.GetReturnValue);
emitter.CodeBuilder.AddStatement(new ReturnStatement(new ConvertExpression(emitter.ReturnType, getRetVal)));
}
else
{
emitter.CodeBuilder.AddStatement(new ReturnStatement());
}
return(emitter);
}
protected override MethodEmitter BuildProxiedMethodBody(MethodEmitter emitter, ClassEmitter @class, INamingScope namingScope)
{
var invocationType = invocation;
Trace.Assert(MethodToOverride.IsGenericMethod == invocationType.IsGenericTypeDefinition);
var genericArguments = Type.EmptyTypes;
var constructor = invocation.GetConstructors()[0];
Expression proxiedMethodTokenExpression;
if (MethodToOverride.IsGenericMethod)
{
// bind generic method arguments to invocation's type arguments
genericArguments = emitter.MethodBuilder.GetGenericArguments();
invocationType = invocationType.MakeGenericType(genericArguments);
constructor = TypeBuilder.GetConstructor(invocationType, constructor);
// Not in the cache: generic method
proxiedMethodTokenExpression = new MethodTokenExpression(MethodToOverride.MakeGenericMethod(genericArguments));
}
else
{
var proxiedMethodToken = @class.CreateStaticField(namingScope.GetUniqueName("token_" + MethodToOverride.Name), typeof(MethodInfo));
@class.ClassConstructor.CodeBuilder.AddStatement(new AssignStatement(proxiedMethodToken, new MethodTokenExpression(MethodToOverride)));
proxiedMethodTokenExpression = proxiedMethodToken.ToExpression();
}
var methodInterceptors = SetMethodInterceptors(@class, namingScope, emitter, proxiedMethodTokenExpression);
var dereferencedArguments = IndirectReference.WrapIfByRef(emitter.Arguments);
var hasByRefArguments = HasByRefArguments(emitter.Arguments);
var arguments = GetCtorArguments(@class, proxiedMethodTokenExpression, dereferencedArguments, methodInterceptors);
var ctorArguments = ModifyArguments(@class, arguments);
var invocationLocal = emitter.CodeBuilder.DeclareLocal(invocationType);
emitter.CodeBuilder.AddStatement(new AssignStatement(invocationLocal,
new NewInstanceExpression(constructor, ctorArguments)));
if (MethodToOverride.ContainsGenericParameters)
{
EmitLoadGenricMethodArguments(emitter, MethodToOverride.MakeGenericMethod(genericArguments), invocationLocal);
}
if (hasByRefArguments)
{
emitter.CodeBuilder.AddStatement(new TryStatement());
}
var proceed = new ExpressionStatement(new MethodInvocationExpression(invocationLocal, InvocationMethods.Proceed));
emitter.CodeBuilder.AddStatement(proceed);
if (hasByRefArguments)
{
emitter.CodeBuilder.AddStatement(new FinallyStatement());
}
GeneratorUtil.CopyOutAndRefParameters(dereferencedArguments, invocationLocal, MethodToOverride, emitter);
if (hasByRefArguments)
{
emitter.CodeBuilder.AddStatement(new EndExceptionBlockStatement());
}
if (MethodToOverride.ReturnType != typeof(void))
{
var getRetVal = new MethodInvocationExpression(invocationLocal, InvocationMethods.GetReturnValue);
// Emit code to ensure a value type return type is not null, otherwise the cast will cause a null-deref
if (emitter.ReturnType.IsValueType && !emitter.ReturnType.IsNullableType())
{
LocalReference returnValue = emitter.CodeBuilder.DeclareLocal(typeof(object));
emitter.CodeBuilder.AddStatement(new AssignStatement(returnValue, getRetVal));
emitter.CodeBuilder.AddExpression(new IfNullExpression(returnValue, new ThrowStatement(typeof(InvalidOperationException),
"Interceptors failed to set a return value, or swallowed the exception thrown by the target")));
}
// Emit code to return with cast from ReturnValue
emitter.CodeBuilder.AddStatement(new ReturnStatement(new ConvertExpression(emitter.ReturnType, getRetVal)));
}
else
{
emitter.CodeBuilder.AddStatement(new ReturnStatement());
}
return(emitter);
}
private void GenerateCall()
{
ArgumentReference arg = new ArgumentReference(typeof(object[]));
_callmethod = CreateMethod("Call",
new ReturnReferenceExpression(typeof(object)), arg);
// LocalReference localRef = method.CodeBuilder.DeclareLocal( typeof(object) );
TypeReference[] dereferencedArguments = IndirectReference.WrapIfByRef(_args);
LocalReference[] localCopies = new LocalReference[_args.Length];
Expression[] invocationArguments = new Expression[_args.Length];
// Load arguments from the object array.
for (int i = 0; i < _args.Length; i++)
{
if (_args[i].Type.IsByRef)
{
localCopies[i] = _callmethod.CodeBuilder.DeclareLocal(dereferencedArguments[i].Type);
_callmethod.CodeBuilder.AddStatement(new AssignStatement(localCopies[i],
new ConvertExpression(dereferencedArguments[i].Type,
new LoadRefArrayElementExpression(i, arg))));
invocationArguments[i] = localCopies[i].ToAddressOfExpression();
}
else
{
invocationArguments[i] = new ConvertExpression(dereferencedArguments[i].Type,
new LoadRefArrayElementExpression(i, arg));
}
}
// Invoke the method.
MethodInvocationExpression methodInv = new MethodInvocationExpression(
_invokeMethod,
invocationArguments);
Expression result = null;
if (_returnType.Type == typeof(void))
{
_callmethod.CodeBuilder.AddStatement(new ExpressionStatement(methodInv));
result = NullExpression.Instance;
}
else
{
LocalReference resultLocal = _callmethod.CodeBuilder.DeclareLocal(typeof(object));
_callmethod.CodeBuilder.AddStatement(new AssignStatement(resultLocal,
new ConvertExpression(typeof(object), _returnType.Type, methodInv)));
result = resultLocal.ToExpression();
}
// Save ByRef arguments into the object array.
for (int i = 0; i < _args.Length; i++)
{
if (_args[i].Type.IsByRef)
{
_callmethod.CodeBuilder.AddStatement(new AssignArrayStatement(arg, i,
new ConvertExpression(typeof(object), dereferencedArguments[i].Type,
localCopies[i].ToExpression())));
}
}
// Return.
_callmethod.CodeBuilder.AddStatement(new ReturnStatement(result));
}
protected override MethodEmitter BuildProxiedMethodBody(MethodEmitter emitter, ClassEmitter @class,
ProxyGenerationOptions options, INamingScope namingScope)
{
var invocationType = invocation;
Trace.Assert(MethodToOverride.IsGenericMethod == invocationType.IsGenericTypeDefinition());
var genericArguments = TypeExtender.EmptyTypes;
var constructor = invocation.GetConstructors()[0];
Expression proxiedMethodTokenExpression;
if (MethodToOverride.IsGenericMethod)
{
// bind generic method arguments to invocation's type arguments
genericArguments = emitter.MethodBuilder.GetGenericArguments();
invocationType = invocationType.MakeGenericType(genericArguments);
constructor = TypeBuilder.GetConstructor(invocationType, constructor);
// Not in the cache: generic method
proxiedMethodTokenExpression = new MethodTokenExpression(MethodToOverride.MakeGenericMethod(genericArguments));
}
else
{
var proxiedMethodToken = @class.CreateStaticField(namingScope.GetUniqueName("token_" + MethodToOverride.Name),
typeof(MethodInfo));
@class.ClassConstructor.CodeBuilder.AddStatement(new AssignStatement(proxiedMethodToken,
new MethodTokenExpression(MethodToOverride)));
proxiedMethodTokenExpression = proxiedMethodToken.ToExpression();
}
var dereferencedArguments = IndirectReference.WrapIfByRef(emitter.Arguments);
var hasByRefArguments = HasByRefArguments(emitter.Arguments);
var arguments = GetCtorArguments(@class, namingScope, proxiedMethodTokenExpression,
dereferencedArguments);
var ctorArguments = ModifyArguments(@class, arguments);
var invocationLocal = emitter.CodeBuilder.DeclareLocal(invocationType);
emitter.CodeBuilder.AddStatement(new AssignStatement(invocationLocal,
new NewInstanceExpression(constructor, ctorArguments)));
if (MethodToOverride.ContainsGenericParameters)
{
EmitLoadGenricMethodArguments(emitter, MethodToOverride.MakeGenericMethod(genericArguments), invocationLocal);
}
if (hasByRefArguments)
{
emitter.CodeBuilder.AddStatement(new TryStatement());
}
var proceed = new ExpressionStatement(new MethodInvocationExpression(invocationLocal, InvocationMethods.Proceed));
emitter.CodeBuilder.AddStatement(proceed);
if (hasByRefArguments)
{
emitter.CodeBuilder.AddStatement(new FinallyStatement());
}
GeneratorUtil.CopyOutAndRefParameters(dereferencedArguments, invocationLocal, MethodToOverride, emitter);
if (hasByRefArguments)
{
emitter.CodeBuilder.AddStatement(new EndExceptionBlockStatement());
}
if (MethodToOverride.ReturnType != typeof(void))
{
// Emit code to return with cast from ReturnValue
// @mbrit - 2012-05-31 - see the note associated with the GetReturnValueForWinRt declaration
// for more information on this...
var useWinRtGenericHandler = false;
#if NETFX_CORE
if (emitter.ReturnType == typeof(int) || emitter.ReturnType == typeof(bool))
{
useWinRtGenericHandler = true;
}
#endif
if (!(useWinRtGenericHandler))
{
var getRetVal = new MethodInvocationExpression(invocationLocal, InvocationMethods.GetReturnValue);
emitter.CodeBuilder.AddStatement(new ReturnStatement(new ConvertExpression(emitter.ReturnType, getRetVal)));
}
else
{
#if NETFX_CORE
var grvArgs = new Type[] { emitter.ReturnType };
var grvCall = InvocationMethods.GetReturnValueForWinRt.MakeGenericMethod(grvArgs);
var getRetVal = new MethodInvocationExpression(invocationLocal, grvCall);
emitter.CodeBuilder.AddStatement(new ReturnStatement(getRetVal));
#endif
}
}
else
{
emitter.CodeBuilder.AddStatement(new ReturnStatement());
}
return(emitter);
}
