/// <summary> /// Emits a call to a throw helper. Use this to emit calls to static parameterless methods that don't return. /// The advantage of using this extension method is that you don't have to deal with what code to emit after /// the call (e.g. do you need to make sure the stack is balanced?). /// </summary> public static void EmitCallThrowHelper(this ILCodeStream codeStream, ILEmitter emitter, MethodDesc method) { Debug.Assert(method.Signature.Length == 0 && method.Signature.IsStatic); // Emit a call followed by a branch to the call. // We are emitting this instead of emitting a tight loop that jumps to itself // so that the JIT doesn't generate extra GC checks within the loop. ILCodeLabel label = emitter.NewCodeLabel(); codeStream.EmitLabel(label); codeStream.Emit(ILOpcode.call, emitter.NewToken(method)); codeStream.Emit(ILOpcode.br, label); }
public override MethodIL EmitIL() { const DelegateThunkKind maxThunkKind = DelegateThunkKind.ObjectArrayThunk; ILEmitter emitter = new ILEmitter(); var codeStream = emitter.NewCodeStream(); ILCodeLabel returnNullLabel = emitter.NewCodeLabel(); ILCodeLabel[] labels = new ILCodeLabel[(int)maxThunkKind]; for (DelegateThunkKind i = 0; i < maxThunkKind; i++) { MethodDesc thunk = _delegateInfo.Thunks[i]; if (thunk != null) labels[(int)i] = emitter.NewCodeLabel(); else labels[(int)i] = returnNullLabel; } codeStream.EmitLdArg(1); codeStream.EmitSwitch(labels); codeStream.Emit(ILOpcode.br, returnNullLabel); for (DelegateThunkKind i = 0; i < maxThunkKind; i++) { MethodDesc thunk = _delegateInfo.Thunks[i]; if (thunk != null) { codeStream.EmitLabel(labels[(int)i]); codeStream.Emit(ILOpcode.ldftn, emitter.NewToken(thunk.InstantiateAsOpen())); codeStream.Emit(ILOpcode.ret); } } codeStream.EmitLabel(returnNullLabel); codeStream.EmitLdc(0); codeStream.Emit(ILOpcode.conv_i); codeStream.Emit(ILOpcode.ret); return emitter.Link(this); }
/// <summary> /// Generates a calli sequence that is aware of fat function pointers and can unwrap them into /// a function pointer + instantiation argument if necessary. /// </summary> public static void EmitTransformedCalli(ILEmitter emitter, ILCodeStream codestream, MethodSignature targetSignature) { TypeSystemContext context = targetSignature.ReturnType.Context; int thisPointerParamDelta = 0; if (!targetSignature.IsStatic) thisPointerParamDelta = 1; // Start by saving the pointer to call and all the args into locals ILLocalVariable vPointerToCall = emitter.NewLocal(context.GetWellKnownType(WellKnownType.IntPtr)); codestream.EmitStLoc(vPointerToCall); ILLocalVariable[] vParameters = new ILLocalVariable[targetSignature.Length + thisPointerParamDelta]; for (int i = thisPointerParamDelta; i < vParameters.Length; i++) { vParameters[vParameters.Length - i - 1 + thisPointerParamDelta] = emitter.NewLocal(targetSignature[targetSignature.Length - (i - thisPointerParamDelta) - 1]); codestream.EmitStLoc(vParameters[vParameters.Length - i - 1 + thisPointerParamDelta]); } if (!targetSignature.IsStatic) { vParameters[0] = emitter.NewLocal(context.GetWellKnownType(WellKnownType.Object)); codestream.EmitStLoc(vParameters[0]); } // Is this a fat pointer? codestream.EmitLdLoc(vPointerToCall); Debug.Assert(((FatFunctionPointerConstants.Offset - 1) & FatFunctionPointerConstants.Offset) == 0); codestream.EmitLdc(FatFunctionPointerConstants.Offset); codestream.Emit(ILOpcode.and); ILCodeLabel notAFatPointer = emitter.NewCodeLabel(); codestream.Emit(ILOpcode.brfalse, notAFatPointer); // // Fat pointer case // codestream.EmitLdLoc(vPointerToCall); codestream.EmitLdc(FatFunctionPointerConstants.Offset); codestream.Emit(ILOpcode.sub); // Get the pointer to call from the fat pointer codestream.Emit(ILOpcode.dup); codestream.Emit(ILOpcode.ldind_i); codestream.EmitStLoc(vPointerToCall); // Get the instantiation argument codestream.EmitLdc(context.Target.PointerSize); codestream.Emit(ILOpcode.add); codestream.Emit(ILOpcode.ldind_i); codestream.Emit(ILOpcode.ldind_i); ILLocalVariable instArg = emitter.NewLocal(context.GetWellKnownType(WellKnownType.IntPtr)); codestream.EmitStLoc(instArg); // Load this int firstRealParameter = 0; if (!targetSignature.IsStatic) { codestream.EmitLdLoc(vParameters[0]); firstRealParameter = 1; } // Load hidden arg codestream.EmitLdLoc(instArg); // Load rest of args for (int i = firstRealParameter; i < vParameters.Length; i++) { codestream.EmitLdLoc(vParameters[i]); } codestream.EmitLdLoc(vPointerToCall); // The signature has a hidden argument TypeDesc[] newParameters = new TypeDesc[targetSignature.Length + 1]; for (int i = 0; i < targetSignature.Length; i++) newParameters[i + 1] = targetSignature[i]; newParameters[0] = context.GetWellKnownType(WellKnownType.IntPtr); MethodSignature newMethodSignature = new MethodSignature(targetSignature.Flags, targetSignature.GenericParameterCount, targetSignature.ReturnType, newParameters); codestream.Emit(ILOpcode.calli, emitter.NewToken(newMethodSignature)); ILCodeLabel done = emitter.NewCodeLabel(); codestream.Emit(ILOpcode.br, done); // // Not a fat pointer case // codestream.EmitLabel(notAFatPointer); for (int i = 0; i < vParameters.Length; i++) { codestream.EmitLdLoc(vParameters[i]); } codestream.EmitLdLoc(vPointerToCall); codestream.Emit(ILOpcode.calli, emitter.NewToken(targetSignature)); codestream.EmitLabel(done); }
public override MethodIL EmitIL() { ILEmitter emitter = new ILEmitter(); ILCodeStream codeStream = emitter.NewCodeStream(); ArrayType invocationListArrayType = SystemDelegateType.MakeArrayType(); ILLocalVariable delegateArrayLocal = emitter.NewLocal(invocationListArrayType); ILLocalVariable invocationCountLocal = emitter.NewLocal(Context.GetWellKnownType(WellKnownType.Int32)); ILLocalVariable iteratorLocal = emitter.NewLocal(Context.GetWellKnownType(WellKnownType.Int32)); ILLocalVariable delegateToCallLocal = emitter.NewLocal(SystemDelegateType); ILLocalVariable returnValueLocal = 0; if (Signature.ReturnType is SignatureVariable || !Signature.ReturnType.IsVoid) { returnValueLocal = emitter.NewLocal(Signature.ReturnType); } // Fill in delegateArrayLocal // Delegate[] delegateArrayLocal = (Delegate[])this.m_helperObject // ldarg.0 (this pointer) // ldfld Delegate.HelperObjectField // castclass Delegate[] // stloc delegateArrayLocal codeStream.EmitLdArg(0); codeStream.Emit(ILOpcode.ldfld, emitter.NewToken(HelperObjectField)); codeStream.Emit(ILOpcode.castclass, emitter.NewToken(invocationListArrayType)); codeStream.EmitStLoc(delegateArrayLocal); // Fill in invocationCountLocal // int invocationCountLocal = this.m_extraFunctionPointerOrData // ldarg.0 (this pointer) // ldfld Delegate.m_extraFunctionPointerOrData // stloc invocationCountLocal codeStream.EmitLdArg(0); codeStream.Emit(ILOpcode.ldfld, emitter.NewToken(ExtraFunctionPointerOrDataField)); codeStream.EmitStLoc(invocationCountLocal); // Fill in iteratorLocal // int iteratorLocal = 0; // ldc.0 // stloc iteratorLocal codeStream.EmitLdc(0); codeStream.EmitStLoc(iteratorLocal); // Loop across every element of the array. ILCodeLabel startOfLoopLabel = emitter.NewCodeLabel(); codeStream.EmitLabel(startOfLoopLabel); // Implement as do/while loop. We only have this stub in play if we're in the multicast situation // Find the delegate to call // Delegate = delegateToCallLocal = delegateArrayLocal[iteratorLocal]; // ldloc delegateArrayLocal // ldloc iteratorLocal // ldelem System.Delegate // stloc delegateToCallLocal codeStream.EmitLdLoc(delegateArrayLocal); codeStream.EmitLdLoc(iteratorLocal); codeStream.Emit(ILOpcode.ldelem, emitter.NewToken(SystemDelegateType)); codeStream.EmitStLoc(delegateToCallLocal); // Call the delegate // returnValueLocal = delegateToCallLocal(...); // ldloc delegateToCallLocal // ldfld System.Delegate.m_firstParameter // ldarg 1, n // ldloc delegateToCallLocal // ldfld System.Delegate.m_functionPointer // calli returnValueType thiscall (all the params) // IF there is a return value // stloc returnValueLocal codeStream.EmitLdLoc(delegateToCallLocal); codeStream.Emit(ILOpcode.ldfld, emitter.NewToken(FirstParameterField)); for (int i = 0; i < Signature.Length; i++) { codeStream.EmitLdArg(i + 1); } codeStream.EmitLdLoc(delegateToCallLocal); codeStream.Emit(ILOpcode.ldfld, emitter.NewToken(FunctionPointerField)); codeStream.Emit(ILOpcode.calli, emitter.NewToken(Signature)); if (returnValueLocal != 0) codeStream.EmitStLoc(returnValueLocal); // Increment iteratorLocal // ++iteratorLocal; // ldloc iteratorLocal // ldc.i4.1 // add // stloc iteratorLocal codeStream.EmitLdLoc(iteratorLocal); codeStream.EmitLdc(1); codeStream.Emit(ILOpcode.add); codeStream.EmitStLoc(iteratorLocal); // Check to see if the loop is done codeStream.EmitLdLoc(invocationCountLocal); codeStream.EmitLdLoc(iteratorLocal); codeStream.Emit(ILOpcode.bne_un, startOfLoopLabel); // Return to caller. If the delegate has a return value, be certain to return that. // return returnValueLocal; // ldloc returnValueLocal // ret if (returnValueLocal != 0) codeStream.EmitLdLoc(returnValueLocal); codeStream.Emit(ILOpcode.ret); return emitter.Link(this); }
public static MethodIL EmitIL(MethodDesc methodThatShouldThrow, TypeSystemException exception) { TypeSystemContext context = methodThatShouldThrow.Context; MethodDesc helper; Type exceptionType = exception.GetType(); if (exceptionType == typeof(TypeSystemException.TypeLoadException)) { // // There are two ThrowTypeLoadException helpers. Find the one which matches the number of // arguments "exception" was initialized with. // helper = context.GetHelperEntryPoint("ThrowHelpers", "ThrowTypeLoadException"); if (helper.Signature.Length != exception.Arguments.Count + 1) { helper = context.GetHelperEntryPoint("ThrowHelpers", "ThrowTypeLoadExceptionWithArgument"); } } else if (exceptionType == typeof(TypeSystemException.MissingFieldException)) { helper = context.GetHelperEntryPoint("ThrowHelpers", "ThrowMissingFieldException"); } else if (exceptionType == typeof(TypeSystemException.MissingMethodException)) { helper = context.GetHelperEntryPoint("ThrowHelpers", "ThrowMissingMethodException"); } else if (exceptionType == typeof(TypeSystemException.FileNotFoundException)) { helper = context.GetHelperEntryPoint("ThrowHelpers", "ThrowFileNotFoundException"); } else if (exceptionType == typeof(TypeSystemException.InvalidProgramException)) { helper = context.GetHelperEntryPoint("ThrowHelpers", "ThrowInvalidProgramException"); } else { throw new NotImplementedException(); } Debug.Assert(helper.Signature.Length == exception.Arguments.Count + 1); var emitter = new ILEmitter(); var codeStream = emitter.NewCodeStream(); var infinityLabel = emitter.NewCodeLabel(); codeStream.EmitLabel(infinityLabel); codeStream.EmitLdc((int)exception.StringID); foreach (var arg in exception.Arguments) { codeStream.Emit(ILOpcode.ldstr, emitter.NewToken(arg)); } codeStream.Emit(ILOpcode.call, emitter.NewToken(helper)); // The call will never return, but we still need to emit something. Emit a jump so that // we don't have to bother balancing the stack if the method returns something. codeStream.Emit(ILOpcode.br, infinityLabel); return emitter.Link(methodThatShouldThrow); }
public override MethodIL EmitIL() { ILEmitter emitter = new ILEmitter(); ILCodeStream codeStream = emitter.NewCodeStream(); ArrayType invocationListArrayType = SystemDelegateType.MakeArrayType(); ILLocalVariable delegateArrayLocal = emitter.NewLocal(invocationListArrayType); ILLocalVariable invocationCountLocal = emitter.NewLocal(Context.GetWellKnownType(WellKnownType.Int32)); ILLocalVariable iteratorLocal = emitter.NewLocal(Context.GetWellKnownType(WellKnownType.Int32)); ILLocalVariable delegateToCallLocal = emitter.NewLocal(SystemDelegateType); ILLocalVariable returnValueLocal = 0; if (!Signature.ReturnType.IsVoid) { returnValueLocal = emitter.NewLocal(Signature.ReturnType); } // Fill in delegateArrayLocal // Delegate[] delegateArrayLocal = (Delegate[])this.m_helperObject // ldarg.0 (this pointer) // ldfld Delegate.HelperObjectField // castclass Delegate[] // stloc delegateArrayLocal codeStream.EmitLdArg(0); codeStream.Emit(ILOpcode.ldfld, emitter.NewToken(HelperObjectField)); codeStream.Emit(ILOpcode.castclass, emitter.NewToken(invocationListArrayType)); codeStream.EmitStLoc(delegateArrayLocal); // Fill in invocationCountLocal // int invocationCountLocal = this.m_extraFunctionPointerOrData // ldarg.0 (this pointer) // ldfld Delegate.m_extraFunctionPointerOrData // stloc invocationCountLocal codeStream.EmitLdArg(0); codeStream.Emit(ILOpcode.ldfld, emitter.NewToken(ExtraFunctionPointerOrDataField)); codeStream.EmitStLoc(invocationCountLocal); // Fill in iteratorLocal // int iteratorLocal = 0; // ldc.0 // stloc iteratorLocal codeStream.EmitLdc(0); codeStream.EmitStLoc(iteratorLocal); // Loop across every element of the array. ILCodeLabel startOfLoopLabel = emitter.NewCodeLabel(); codeStream.EmitLabel(startOfLoopLabel); // Implement as do/while loop. We only have this stub in play if we're in the multicast situation // Find the delegate to call // Delegate = delegateToCallLocal = delegateArrayLocal[iteratorLocal]; // ldloc delegateArrayLocal // ldloc iteratorLocal // ldelem System.Delegate // stloc delegateToCallLocal codeStream.EmitLdLoc(delegateArrayLocal); codeStream.EmitLdLoc(iteratorLocal); codeStream.Emit(ILOpcode.ldelem, emitter.NewToken(SystemDelegateType)); codeStream.EmitStLoc(delegateToCallLocal); // Call the delegate // returnValueLocal = delegateToCallLocal(...); // ldloc delegateToCallLocal // ldfld System.Delegate.m_firstParameter // ldarg 1, n // ldloc delegateToCallLocal // ldfld System.Delegate.m_functionPointer // calli returnValueType thiscall (all the params) // IF there is a return value // stloc returnValueLocal codeStream.EmitLdLoc(delegateToCallLocal); codeStream.Emit(ILOpcode.ldfld, emitter.NewToken(FirstParameterField)); for (int i = 0; i < Signature.Length; i++) { codeStream.EmitLdArg(i + 1); } codeStream.EmitLdLoc(delegateToCallLocal); codeStream.Emit(ILOpcode.ldfld, emitter.NewToken(FunctionPointerField)); codeStream.Emit(ILOpcode.calli, emitter.NewToken(Signature)); if (returnValueLocal != 0) { codeStream.EmitStLoc(returnValueLocal); } // Increment iteratorLocal // ++iteratorLocal; // ldloc iteratorLocal // ldc.i4.1 // add // stloc iteratorLocal codeStream.EmitLdLoc(iteratorLocal); codeStream.EmitLdc(1); codeStream.Emit(ILOpcode.add); codeStream.EmitStLoc(iteratorLocal); // Check to see if the loop is done codeStream.EmitLdLoc(invocationCountLocal); codeStream.EmitLdLoc(iteratorLocal); codeStream.Emit(ILOpcode.bne_un, startOfLoopLabel); // Return to caller. If the delegate has a return value, be certain to return that. // return returnValueLocal; // ldloc returnValueLocal // ret if (returnValueLocal != 0) { codeStream.EmitLdLoc(returnValueLocal); } codeStream.Emit(ILOpcode.ret); return(emitter.Link(this)); }
public override MethodIL EmitIL() { ILEmitter emitter = new ILEmitter(); ILCodeStream argSetupStream = emitter.NewCodeStream(); ILCodeStream thisCallSiteSetupStream = emitter.NewCodeStream(); ILCodeStream staticCallSiteSetupStream = emitter.NewCodeStream(); // This function will look like // // !For each parameter to the method // !if (parameter is In Parameter) // localX is TypeOfParameterX& // ldtoken TypeOfParameterX // call DynamicInvokeParamHelperIn(RuntimeTypeHandle) // stloc localX // !else // localX is TypeOfParameter // ldtoken TypeOfParameterX // call DynamicInvokeParamHelperRef(RuntimeTypeHandle) // stloc localX // ldarg.2 // call DynamicInvokeArgSetupComplete(ref ArgSetupState) // *** Thiscall instruction stream starts here *** // ldarg.3 // Load targetIsThisCall // brfalse Not_this_call // ldarg.0 // Load this pointer // !For each parameter // !if (parameter is In Parameter) // ldloc localX // ldobj TypeOfParameterX // !else // ldloc localX // ldarg.1 // calli ReturnType thiscall(TypeOfParameter1, ...) // !if ((ReturnType == void) // ldnull // !else // box ReturnType // ret // *** Static call instruction stream starts here *** // Not_this_call: // !For each parameter // !if (parameter is In Parameter) // ldloc localX // ldobj TypeOfParameterX // !else // ldloc localX // ldarg.1 // calli ReturnType (TypeOfParameter1, ...) // !if ((ReturnType == void) // ldnull // !else // box ReturnType // ret ILCodeLabel lStaticCall = emitter.NewCodeLabel(); thisCallSiteSetupStream.EmitLdArg(3); // targetIsThisCall thisCallSiteSetupStream.Emit(ILOpcode.brfalse, lStaticCall); staticCallSiteSetupStream.EmitLabel(lStaticCall); thisCallSiteSetupStream.EmitLdArg(0); // thisPtr ILToken tokDynamicInvokeParamHelperRef = emitter.NewToken(InvokeUtilsType.GetKnownMethod("DynamicInvokeParamHelperRef", null)); ILToken tokDynamicInvokeParamHelperIn = emitter.NewToken(InvokeUtilsType.GetKnownMethod("DynamicInvokeParamHelperIn", null)); TypeDesc[] targetMethodSignature = new TypeDesc[_targetSignature.Length]; for (int paramIndex = 0; paramIndex < _targetSignature.Length; paramIndex++) { TypeDesc paramType = Context.GetSignatureVariable(paramIndex, true); ILToken tokParamType = emitter.NewToken(paramType); ILLocalVariable local = emitter.NewLocal(paramType.MakeByRefType()); thisCallSiteSetupStream.EmitLdLoc(local); staticCallSiteSetupStream.EmitLdLoc(local); argSetupStream.Emit(ILOpcode.ldtoken, tokParamType); if (_targetSignature[paramIndex] == DynamicInvokeMethodParameterKind.Reference) { argSetupStream.Emit(ILOpcode.call, tokDynamicInvokeParamHelperRef); targetMethodSignature[paramIndex] = paramType.MakeByRefType(); } else { argSetupStream.Emit(ILOpcode.call, tokDynamicInvokeParamHelperIn); thisCallSiteSetupStream.Emit(ILOpcode.ldobj, tokParamType); staticCallSiteSetupStream.Emit(ILOpcode.ldobj, tokParamType); targetMethodSignature[paramIndex] = paramType; } argSetupStream.EmitStLoc(local); } argSetupStream.EmitLdArg(2); // argSetupState argSetupStream.Emit(ILOpcode.call, emitter.NewToken(InvokeUtilsType.GetKnownMethod("DynamicInvokeArgSetupComplete", null))); thisCallSiteSetupStream.EmitLdArg(1); // methodToCall staticCallSiteSetupStream.EmitLdArg(1); // methodToCall TypeDesc returnType = _targetSignature.HasReturnValue ? Context.GetSignatureVariable(_targetSignature.Length, true) : Context.GetWellKnownType(WellKnownType.Void); MethodSignature thisCallMethodSig = new MethodSignature(0, 0, returnType, targetMethodSignature); thisCallSiteSetupStream.Emit(ILOpcode.calli, emitter.NewToken(thisCallMethodSig)); MethodSignature staticCallMethodSig = new MethodSignature(MethodSignatureFlags.Static, 0, returnType, targetMethodSignature); staticCallSiteSetupStream.Emit(ILOpcode.calli, emitter.NewToken(staticCallMethodSig)); if (_targetSignature.HasReturnValue) { ILToken tokReturnType = emitter.NewToken(returnType); thisCallSiteSetupStream.Emit(ILOpcode.box, tokReturnType); staticCallSiteSetupStream.Emit(ILOpcode.box, tokReturnType); } else { thisCallSiteSetupStream.Emit(ILOpcode.ldnull); staticCallSiteSetupStream.Emit(ILOpcode.ldnull); } thisCallSiteSetupStream.Emit(ILOpcode.ret); staticCallSiteSetupStream.Emit(ILOpcode.ret); return(emitter.Link(this)); }
public override MethodIL EmitIL() { ILEmitter emitter = new ILEmitter(); var codeStream = emitter.NewCodeStream(); ILCodeLabel returnNullLabel = emitter.NewCodeLabel(); bool hasDynamicInvokeThunk = (_delegateInfo.SupportedFeatures & DelegateFeature.DynamicInvoke) != 0 && DynamicInvokeMethodThunk.SupportsSignature(_delegateInfo.Signature); ILCodeLabel[] labels = new ILCodeLabel[(int)DelegateThunkCollection.MaxThunkKind]; for (DelegateThunkKind i = 0; i < DelegateThunkCollection.MaxThunkKind; i++) { MethodDesc thunk = _delegateInfo.Thunks[i]; if (thunk != null || (i == DelegateThunkKind.DelegateInvokeThunk && hasDynamicInvokeThunk)) { labels[(int)i] = emitter.NewCodeLabel(); } else { labels[(int)i] = returnNullLabel; } } codeStream.EmitLdArg(1); codeStream.EmitSwitch(labels); codeStream.Emit(ILOpcode.br, returnNullLabel); for (DelegateThunkKind i = 0; i < DelegateThunkCollection.MaxThunkKind; i++) { MethodDesc targetMethod = null; // Dynamic invoke thunk is special since we're calling into a shared helper if (i == DelegateThunkKind.DelegateInvokeThunk && hasDynamicInvokeThunk) { Debug.Assert(_delegateInfo.Thunks[i] == null); var sig = new DynamicInvokeMethodSignature(_delegateInfo.Signature); MethodDesc thunk = Context.GetDynamicInvokeThunk(sig); if (thunk.HasInstantiation) { TypeDesc[] inst = DynamicInvokeMethodThunk.GetThunkInstantiationForMethod(_delegateInfo.Type.InstantiateAsOpen().GetMethod("Invoke", null)); targetMethod = Context.GetInstantiatedMethod(thunk, new Instantiation(inst)); } else { targetMethod = thunk; } } else { MethodDesc thunk = _delegateInfo.Thunks[i]; if (thunk != null) { targetMethod = thunk.InstantiateAsOpen(); } } if (targetMethod != null) { codeStream.EmitLabel(labels[(int)i]); codeStream.Emit(ILOpcode.ldftn, emitter.NewToken(targetMethod)); codeStream.Emit(ILOpcode.ret); } } codeStream.EmitLabel(returnNullLabel); codeStream.EmitLdc(0); codeStream.Emit(ILOpcode.conv_i); codeStream.Emit(ILOpcode.ret); return(emitter.Link(this)); }
public override MethodIL EmitIL() { // We will generate the following code: // // object ret; // object[] args = new object[parameterCount]; // args[0] = param0; // args[1] = param1; // ... // try { // ret = ((Func<object[], object>)dlg.m_helperObject)(args); // } finally { // param0 = (T0)args[0]; // only generated for each byref argument // } // return (TRet)ret; ILEmitter emitter = new ILEmitter(); ILCodeStream codeStream = emitter.NewCodeStream(); TypeDesc objectType = Context.GetWellKnownType(WellKnownType.Object); TypeDesc objectArrayType = objectType.MakeArrayType(); ILLocalVariable argsLocal = emitter.NewLocal(objectArrayType); bool hasReturnValue = !Signature.ReturnType.IsVoid; bool hasRefArgs = false; if (Signature.Length > 0) { codeStream.EmitLdc(Signature.Length); codeStream.Emit(ILOpcode.newarr, emitter.NewToken(objectType)); codeStream.EmitStLoc(argsLocal); for (int i = 0; i < Signature.Length; i++) { TypeDesc paramType = Signature[i]; bool paramIsByRef = false; if (paramType.IsByRef) { hasRefArgs |= paramType.IsByRef; paramIsByRef = true; paramType = ((ByRefType)paramType).ParameterType; } hasRefArgs |= paramType.IsByRef; codeStream.EmitLdLoc(argsLocal); codeStream.EmitLdc(i); codeStream.EmitLdArg(i + 1); ILToken paramToken = emitter.NewToken(paramType); if (paramIsByRef) { codeStream.Emit(ILOpcode.ldobj, paramToken); } codeStream.Emit(ILOpcode.box, paramToken); codeStream.Emit(ILOpcode.stelem_ref); } } else { MethodDesc emptyObjectArrayMethod = Context.GetHelperEntryPoint("DelegateHelpers", "GetEmptyObjectArray"); codeStream.Emit(ILOpcode.call, emitter.NewToken(emptyObjectArrayMethod)); codeStream.EmitStLoc(argsLocal); } ILExceptionRegionBuilder tryFinallyRegion = null; if (hasRefArgs) { // we emit a try/finally to update the args array even if an exception is thrown tryFinallyRegion = emitter.NewFinallyRegion(); codeStream.BeginTry(tryFinallyRegion); } codeStream.EmitLdArg(0); codeStream.Emit(ILOpcode.ldfld, emitter.NewToken(HelperObjectField)); MetadataType funcType = Context.SystemModule.GetKnownType("System", "Func`2"); TypeDesc instantiatedFunc = funcType.MakeInstantiatedType(objectArrayType, objectType); codeStream.Emit(ILOpcode.castclass, emitter.NewToken(instantiatedFunc)); codeStream.EmitLdLoc(argsLocal); MethodDesc invokeMethod = instantiatedFunc.GetKnownMethod("Invoke", null); codeStream.Emit(ILOpcode.callvirt, emitter.NewToken(invokeMethod)); ILLocalVariable retLocal = (ILLocalVariable)(-1); if (hasReturnValue) { retLocal = emitter.NewLocal(objectType); codeStream.EmitStLoc(retLocal); } else { codeStream.Emit(ILOpcode.pop); } if (hasRefArgs) { ILCodeLabel returnLabel = emitter.NewCodeLabel(); codeStream.Emit(ILOpcode.leave, returnLabel); codeStream.EndTry(tryFinallyRegion); // copy back ref/out args codeStream.BeginHandler(tryFinallyRegion); for (int i = 0; i < Signature.Length; i++) { TypeDesc paramType = Signature[i]; if (paramType.IsByRef) { paramType = ((ByRefType)paramType).ParameterType; ILToken paramToken = emitter.NewToken(paramType); // Update parameter codeStream.EmitLdArg(i + 1); codeStream.EmitLdLoc(argsLocal); codeStream.EmitLdc(i); codeStream.Emit(ILOpcode.ldelem_ref); codeStream.Emit(ILOpcode.unbox_any, paramToken); codeStream.Emit(ILOpcode.stobj, paramToken); } } codeStream.Emit(ILOpcode.endfinally); codeStream.EndHandler(tryFinallyRegion); codeStream.EmitLabel(returnLabel); } if (hasReturnValue) { codeStream.EmitLdLoc(retLocal); codeStream.Emit(ILOpcode.unbox_any, emitter.NewToken(Signature.ReturnType)); } codeStream.Emit(ILOpcode.ret); return(emitter.Link(this)); }