private MethodIL EmitCleanupIL(PInvokeILCodeStreams pInvokeILCodeStreams)
{
Marshaller[] marshallers = InitializeMarshallers();
ILEmitter emitter = pInvokeILCodeStreams.Emitter;
ILCodeStream codeStream = pInvokeILCodeStreams.MarshallingCodeStream;
IEnumerator <FieldDesc> nativeEnumerator = NativeType.GetFields().GetEnumerator();
int index = 0;
foreach (var managedField in ManagedType.GetFields())
{
if (managedField.IsStatic)
{
continue;
}
bool notEmpty = nativeEnumerator.MoveNext();
Debug.Assert(notEmpty == true);
var nativeField = nativeEnumerator.Current;
Debug.Assert(nativeField != null);
if (marshallers[index].CleanupRequired)
{
LoadFieldValueFromArg(0, nativeField, pInvokeILCodeStreams);
marshallers[index].EmitElementCleanup(codeStream, emitter);
}
index++;
}
pInvokeILCodeStreams.UnmarshallingCodestream.Emit(ILOpcode.ret);
return(emitter.Link(this));
}
private MethodIL EmitIL()
{
PInvokeILCodeStreams pInvokeILCodeStreams = new PInvokeILCodeStreams();
ILEmitter emitter = pInvokeILCodeStreams.Emitter;
ILCodeStream unmarshallingCodestream = pInvokeILCodeStreams.UnmarshallingCodestream;
// Marshal the arguments
for (int i = 0; i < _marshallers.Length; i++)
{
_marshallers[i].EmitMarshallingIL(pInvokeILCodeStreams);
}
// make the call
switch (_targetMethod)
{
case DelegateMarshallingMethodThunk delegateMethod:
EmitDelegateCall(delegateMethod, pInvokeILCodeStreams);
break;
case CalliMarshallingMethodThunk calliMethod:
EmitCalli(pInvokeILCodeStreams, calliMethod);
break;
default:
EmitPInvokeCall(pInvokeILCodeStreams);
break;
}
_marshallers[0].LoadReturnValue(unmarshallingCodestream);
unmarshallingCodestream.Emit(ILOpcode.ret);
return(new PInvokeILStubMethodIL((ILStubMethodIL)emitter.Link(_targetMethod), IsStubRequired()));
}
public override MethodIL EmitIL()
{
try
{
PInvokeILCodeStreams pInvokeILCodeStreams = new PInvokeILCodeStreams();
if (ThunkType == StructMarshallingThunkType.Cleanup)
{
return(EmitCleanupIL(pInvokeILCodeStreams));
}
else
{
return(EmitMarshallingIL(pInvokeILCodeStreams));
}
}
catch (NotSupportedException)
{
string message = "Struct '" + ((MetadataType)ManagedType).Name +
"' requires marshalling that is not yet supported by this compiler.";
return(MarshalHelpers.EmitExceptionBody(message, this));
}
catch (InvalidProgramException ex)
{
Debug.Assert(!String.IsNullOrEmpty(ex.Message));
return(MarshalHelpers.EmitExceptionBody(ex.Message, this));
}
}
private MethodIL EmitIL()
{
PInvokeILCodeStreams pInvokeILCodeStreams = new PInvokeILCodeStreams();
ILEmitter emitter = pInvokeILCodeStreams.Emitter;
ILCodeStream unmarshallingCodestream = pInvokeILCodeStreams.UnmarshallingCodestream;
// Marshal the arguments
for (int i = 0; i < _marshallers.Length; i++)
{
_marshallers[i].EmitMarshallingIL(pInvokeILCodeStreams);
}
// make the call
DelegateMarshallingMethodThunk delegateMethod = _targetMethod as DelegateMarshallingMethodThunk;
if (delegateMethod != null)
{
EmitDelegateCall(delegateMethod, pInvokeILCodeStreams);
}
else
{
EmitPInvokeCall(pInvokeILCodeStreams);
}
unmarshallingCodestream.Emit(ILOpcode.ret);
return(new PInvokeILStubMethodIL((ILStubMethodIL)emitter.Link(_targetMethod, nonConformingStackWorkaround: true),
IsStubRequired()));
}
private MethodIL EmitIL()
{
// Temp workaround to disable PInvoke stubs that require marshalling.
// https://github.com/dotnet/runtime/issues/248
{
if (Marshaller.IsMarshallingRequired(_targetMethod))
{
throw new NotSupportedException();
}
}
if (!_importMetadata.Flags.PreserveSig)
{
throw new NotSupportedException();
}
if (_targetMethod.HasCustomAttribute("System.Runtime.InteropServices", "LCIDConversionAttribute"))
{
throw new NotSupportedException();
}
PInvokeILCodeStreams pInvokeILCodeStreams = new PInvokeILCodeStreams();
ILEmitter emitter = pInvokeILCodeStreams.Emitter;
ILCodeStream marshallingCodestream = pInvokeILCodeStreams.MarshallingCodeStream;
ILCodeStream unmarshallingCodestream = pInvokeILCodeStreams.UnmarshallingCodestream;
ILCodeStream cleanupCodestream = pInvokeILCodeStreams.CleanupCodeStream;
/* Temp workaround: disable EH blocks because of https://github.com/dotnet/runtime/issues/248
*
* // Marshalling is wrapped in a finally block to guarantee cleanup
* ILExceptionRegionBuilder tryFinally = emitter.NewFinallyRegion();
*
* marshallingCodestream.BeginTry(tryFinally);
* cleanupCodestream.BeginHandler(tryFinally);*/
// Marshal the arguments
for (int i = 0; i < _marshallers.Length; i++)
{
_marshallers[i].EmitMarshallingIL(pInvokeILCodeStreams);
}
EmitPInvokeCall(pInvokeILCodeStreams);
ILCodeLabel lReturn = emitter.NewCodeLabel();
/* Temp workaround: disable EH blocks because of https://github.com/dotnet/runtime/issues/248
* unmarshallingCodestream.Emit(ILOpcode.leave, lReturn);
* unmarshallingCodestream.EndTry(tryFinally);
*
* cleanupCodestream.Emit(ILOpcode.endfinally);
* cleanupCodestream.EndHandler(tryFinally);*/
cleanupCodestream.EmitLabel(lReturn);
_marshallers[0].LoadReturnValue(cleanupCodestream);
cleanupCodestream.Emit(ILOpcode.ret);
return(new PInvokeILStubMethodIL((ILStubMethodIL)emitter.Link(_targetMethod)));
}
/// <summary>
/// Loads the value of field of a struct at argument index argIndex to stack
/// </summary>
private void LoadFieldValueFromArg(int argIndex, FieldDesc field, PInvokeILCodeStreams pInvokeILCodeStreams)
{
ILCodeStream stream = pInvokeILCodeStreams.MarshallingCodeStream;
ILEmitter emitter = pInvokeILCodeStreams.Emitter;
stream.EmitLdArg(argIndex);
stream.Emit(ILOpcode.ldfld, emitter.NewToken(field));
}
private MethodIL EmitIL()
{
PInvokeILCodeStreams pInvokeILCodeStreams = new PInvokeILCodeStreams();
ILEmitter emitter = pInvokeILCodeStreams.Emitter;
ILCodeStream marshallingCodestream = pInvokeILCodeStreams.MarshallingCodeStream;
ILCodeStream unmarshallingCodestream = pInvokeILCodeStreams.UnmarshallingCodestream;
ILCodeStream cleanupCodestream = pInvokeILCodeStreams.CleanupCodeStream;
// Marshalling is wrapped in a finally block to guarantee cleanup
ILExceptionRegionBuilder tryFinally = emitter.NewFinallyRegion();
marshallingCodestream.BeginTry(tryFinally);
cleanupCodestream.BeginHandler(tryFinally);
// Marshal the arguments
bool isHRSwappedRetVal = !_flags.PreserveSig && !_targetMethod.Signature.ReturnType.IsVoid;
for (int i = isHRSwappedRetVal ? 1 : 0; i < _marshallers.Length; i++)
{
_marshallers[i].EmitMarshallingIL(pInvokeILCodeStreams);
}
if (isHRSwappedRetVal)
{
_marshallers[0].EmitMarshallingIL(pInvokeILCodeStreams);
}
// make the call
switch (_targetMethod)
{
case DelegateMarshallingMethodThunk delegateMethod:
EmitDelegateCall(delegateMethod, pInvokeILCodeStreams);
break;
case CalliMarshallingMethodThunk calliMethod:
EmitCalli(pInvokeILCodeStreams, calliMethod);
break;
default:
EmitPInvokeCall(pInvokeILCodeStreams);
break;
}
ILCodeLabel lReturn = emitter.NewCodeLabel();
unmarshallingCodestream.Emit(ILOpcode.leave, lReturn);
unmarshallingCodestream.EndTry(tryFinally);
cleanupCodestream.Emit(ILOpcode.endfinally);
cleanupCodestream.EndHandler(tryFinally);
cleanupCodestream.EmitLabel(lReturn);
_marshallers[0].LoadReturnValue(cleanupCodestream);
cleanupCodestream.Emit(ILOpcode.ret);
return(new PInvokeILStubMethodIL((ILStubMethodIL)emitter.Link(_targetMethod), IsStubRequired()));
}
private MethodIL EmitIL()
{
if (!_importMetadata.Flags.PreserveSig)
{
throw new NotSupportedException();
}
if (MarshalHelpers.ShouldCheckForPendingException(_targetMethod.Context.Target, _importMetadata))
{
throw new NotSupportedException();
}
if (_targetMethod.IsUnmanagedCallersOnly)
{
throw new NotSupportedException();
}
if (_targetMethod.HasCustomAttribute("System.Runtime.InteropServices", "LCIDConversionAttribute"))
{
throw new NotSupportedException();
}
PInvokeILCodeStreams pInvokeILCodeStreams = new PInvokeILCodeStreams();
ILEmitter emitter = pInvokeILCodeStreams.Emitter;
ILCodeStream marshallingCodestream = pInvokeILCodeStreams.MarshallingCodeStream;
ILCodeStream unmarshallingCodestream = pInvokeILCodeStreams.UnmarshallingCodestream;
ILCodeStream cleanupCodestream = pInvokeILCodeStreams.CleanupCodeStream;
// Marshalling is wrapped in a finally block to guarantee cleanup
ILExceptionRegionBuilder tryFinally = emitter.NewFinallyRegion();
marshallingCodestream.BeginTry(tryFinally);
cleanupCodestream.BeginHandler(tryFinally);
// Marshal the arguments
for (int i = 0; i < _marshallers.Length; i++)
{
_marshallers[i].EmitMarshallingIL(pInvokeILCodeStreams);
}
EmitPInvokeCall(pInvokeILCodeStreams);
ILCodeLabel lReturn = emitter.NewCodeLabel();
unmarshallingCodestream.Emit(ILOpcode.leave, lReturn);
unmarshallingCodestream.EndTry(tryFinally);
cleanupCodestream.Emit(ILOpcode.endfinally);
cleanupCodestream.EndHandler(tryFinally);
cleanupCodestream.EmitLabel(lReturn);
_marshallers[0].LoadReturnValue(cleanupCodestream);
cleanupCodestream.Emit(ILOpcode.ret);
return(new PInvokeILStubMethodIL((ILStubMethodIL)emitter.Link(_targetMethod)));
}
private MethodIL EmitMarshallingIL(PInvokeILCodeStreams pInvokeILCodeStreams, Marshaller[] marshallers)
{
ILEmitter emitter = pInvokeILCodeStreams.Emitter;
IEnumerator <FieldDesc> nativeEnumerator = NativeType.GetFields().GetEnumerator();
int index = 0;
foreach (var managedField in ManagedType.GetFields())
{
if (managedField.IsStatic)
{
continue;
}
bool notEmpty = nativeEnumerator.MoveNext();
Debug.Assert(notEmpty == true);
var nativeField = nativeEnumerator.Current;
Debug.Assert(nativeField != null);
//
// Field marshallers expects the value of the fields to be
// loaded on the stack. We load the value on the stack
// before calling the marshallers
//
if (ThunkType == StructMarshallingThunkType.ManagedToNative)
{
LoadFieldValueFromArg(0, managedField, pInvokeILCodeStreams);
}
else if (ThunkType == StructMarshallingThunkType.NativeToManage)
{
LoadFieldValueFromArg(1, nativeField, pInvokeILCodeStreams);
}
marshallers[index++].EmitMarshallingIL(pInvokeILCodeStreams);
if (ThunkType == StructMarshallingThunkType.ManagedToNative)
{
StoreFieldValueFromArg(1, nativeField, pInvokeILCodeStreams);
}
else if (ThunkType == StructMarshallingThunkType.NativeToManage)
{
StoreFieldValueFromArg(0, managedField, pInvokeILCodeStreams);
}
}
Debug.Assert(!nativeEnumerator.MoveNext());
pInvokeILCodeStreams.UnmarshallingCodestream.Emit(ILOpcode.ret);
return(emitter.Link(this));
}
private void StoreFieldValueFromArg(int argIndex, FieldDesc field, PInvokeILCodeStreams pInvokeILCodeStreams)
{
ILCodeStream stream = pInvokeILCodeStreams.MarshallingCodeStream;
ILEmitter emitter = pInvokeILCodeStreams.Emitter;
Internal.IL.Stubs.ILLocalVariable var = emitter.NewLocal(field.FieldType);
stream.EmitStLoc(var);
stream.EmitLdArg(argIndex);
stream.EmitLdLoc(var);
stream.Emit(ILOpcode.stfld, emitter.NewToken(field));
}
private void EmitPInvokeCall(PInvokeILCodeStreams ilCodeStreams)
{
ILEmitter emitter = ilCodeStreams.Emitter;
ILCodeStream callsiteSetupCodeStream = ilCodeStreams.CallsiteSetupCodeStream;
TypeSystemContext context = _targetMethod.Context;
TypeDesc nativeReturnType = _marshallers[0].NativeParameterType;
TypeDesc[] nativeParameterTypes = new TypeDesc[_marshallers.Length - 1];
MetadataType stubHelpersType = InteropTypes.GetStubHelpers(context);
// if the SetLastError flag is set in DllImport, clear the error code before doing P/Invoke
if (_importMetadata.Flags.SetLastError)
{
if (!MarshalHelpers.IsRuntimeMarshallingEnabled(((MetadataType)_targetMethod.OwningType).Module))
{
// When runtime marshalling is disabled, we don't support generating the stub IL
// in Ready-to-Run so we can correctly throw an exception at runtime when the user tries to
// use SetLastError=true when marshalling is disabled.
throw new NotSupportedException();
}
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
stubHelpersType.GetKnownMethod("ClearLastError", null)));
}
for (int i = 1; i < _marshallers.Length; i++)
{
nativeParameterTypes[i - 1] = _marshallers[i].NativeParameterType;
}
MethodSignature nativeSig = new MethodSignature(
_targetMethod.Signature.Flags, 0, nativeReturnType,
nativeParameterTypes);
var rawTargetMethod = new PInvokeTargetNativeMethod(_targetMethod, nativeSig);
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(rawTargetMethod));
// if the SetLastError flag is set in DllImport, call the PInvokeMarshal.SaveLastError
// so that last error can be used later by calling Marshal.GetLastPInvokeError
if (_importMetadata.Flags.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
stubHelpersType.GetKnownMethod("SetLastError", null)));
}
}
private void EmitPInvokeCall(PInvokeILCodeStreams ilCodeStreams)
{
ILEmitter emitter = ilCodeStreams.Emitter;
ILCodeStream callsiteSetupCodeStream = ilCodeStreams.CallsiteSetupCodeStream;
TypeSystemContext context = _targetMethod.Context;
TypeDesc nativeReturnType = _marshallers[0].NativeParameterType;
TypeDesc[] nativeParameterTypes = new TypeDesc[_marshallers.Length - 1];
MetadataType stubHelpersType = InteropTypes.GetStubHelpers(context);
// if the SetLastError flag is set in DllImport, clear the error code before doing P/Invoke
if (_importMetadata.Flags.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
stubHelpersType.GetKnownMethod("ClearLastError", null)));
}
for (int i = 1; i < _marshallers.Length; i++)
{
nativeParameterTypes[i - 1] = _marshallers[i].NativeParameterType;
}
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
stubHelpersType.GetKnownMethod("GetStubContext", null)));
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
stubHelpersType.GetKnownMethod("GetNDirectTarget", null)));
MethodSignatureFlags unmanagedCallConv = _importMetadata.Flags.UnmanagedCallingConvention;
MethodSignature nativeSig = new MethodSignature(
_targetMethod.Signature.Flags | unmanagedCallConv, 0, nativeReturnType,
nativeParameterTypes);
callsiteSetupCodeStream.Emit(ILOpcode.calli, emitter.NewToken(nativeSig));
// if the SetLastError flag is set in DllImport, call the PInvokeMarshal.
// SaveLastWin32Error so that last error can be used later by calling
// PInvokeMarshal.GetLastWin32Error
if (_importMetadata.Flags.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
stubHelpersType.GetKnownMethod("SetLastError", null)));
}
}
private MethodIL EmitIL()
{
PInvokeILCodeStreams pInvokeILCodeStreams = new PInvokeILCodeStreams();
ILEmitter emitter = pInvokeILCodeStreams.Emitter;
ILCodeStream unmarshallingCodestream = pInvokeILCodeStreams.UnmarshallingCodestream;
// Marshal the arguments
for (int i = 0; i < _marshallers.Length; i++)
{
_marshallers[i].EmitMarshallingIL(pInvokeILCodeStreams);
}
EmitPInvokeCall(pInvokeILCodeStreams);
_marshallers[0].LoadReturnValue(unmarshallingCodestream);
unmarshallingCodestream.Emit(ILOpcode.ret);
return(new PInvokeILStubMethodIL((ILStubMethodIL)emitter.Link(_targetMethod), IsStubRequired()));
}
private void EmitCalli(PInvokeILCodeStreams ilCodeStreams, CalliMarshallingMethodThunk calliThunk)
{
ILEmitter emitter = ilCodeStreams.Emitter;
ILCodeStream callsiteSetupCodeStream = ilCodeStreams.CallsiteSetupCodeStream;
TypeDesc nativeReturnType = _marshallers[0].NativeParameterType;
TypeDesc[] nativeParameterTypes = new TypeDesc[_marshallers.Length - 1];
for (int i = 1; i < _marshallers.Length; i++)
{
nativeParameterTypes[i - 1] = _marshallers[i].NativeParameterType;
}
MethodSignature nativeSig = new MethodSignature(
calliThunk.TargetSignature.Flags, 0, nativeReturnType,
nativeParameterTypes, calliThunk.TargetSignature.GetEmbeddedSignatureData());
callsiteSetupCodeStream.EmitLdArg(calliThunk.TargetSignature.Length);
callsiteSetupCodeStream.Emit(ILOpcode.calli, emitter.NewToken(nativeSig));
}
private MethodIL EmitCleanupIL(PInvokeILCodeStreams pInvokeILCodeStreams)
{
ILEmitter emitter = pInvokeILCodeStreams.Emitter;
ILCodeStream codeStream = pInvokeILCodeStreams.MarshallingCodeStream;
IEnumerator <FieldDesc> nativeEnumerator = NativeType.GetFields().GetEnumerator();
for (int i = 0; i < _marshallers.Length; i++)
{
bool valid = nativeEnumerator.MoveNext();
Debug.Assert(valid);
if (_marshallers[i].CleanupRequired)
{
LoadFieldValueFromArg(0, nativeEnumerator.Current, pInvokeILCodeStreams);
_marshallers[i].EmitElementCleanup(codeStream, emitter);
}
}
pInvokeILCodeStreams.UnmarshallingCodestream.Emit(ILOpcode.ret);
return(emitter.Link(this));
}
private void EmitPInvokeCall(PInvokeILCodeStreams ilCodeStreams)
{
ILEmitter emitter = ilCodeStreams.Emitter;
ILCodeStream callsiteSetupCodeStream = ilCodeStreams.CallsiteSetupCodeStream;
TypeSystemContext context = _targetMethod.Context;
TypeDesc nativeReturnType = _marshallers[0].NativeParameterType;
TypeDesc[] nativeParameterTypes = new TypeDesc[_marshallers.Length - 1];
for (int i = 1; i < _marshallers.Length; i++)
{
nativeParameterTypes[i - 1] = _marshallers[i].NativeParameterType;
}
MethodSignature nativeSig = new MethodSignature(
_targetMethod.Signature.Flags, 0, nativeReturnType,
nativeParameterTypes);
var rawTargetMethod = new PInvokeTargetNativeMethod(_targetMethod, nativeSig);
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(rawTargetMethod));
}
private MethodIL EmitIL()
{
PInvokeILCodeStreams pInvokeILCodeStreams = new PInvokeILCodeStreams();
ILEmitter emitter = pInvokeILCodeStreams.Emitter;
ILCodeStream fnptrLoadStream = pInvokeILCodeStreams.FunctionPointerLoadStream;
ILCodeStream callsiteSetupCodeStream = pInvokeILCodeStreams.CallsiteSetupCodeStream;
ILCodeStream unmarshallingCodestream = pInvokeILCodeStreams.UnmarshallingCodestream;
TypeSystemContext context = _targetMethod.Context;
// Marshal the arguments
for (int i = 0; i < _marshallers.Length; i++)
{
_marshallers[i].EmitMarshallingIL(pInvokeILCodeStreams);
}
// if the SetLastError flag is set in DllImport, clear the error code before doing P/Invoke
if (_importMetadata.Flags.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
InteropTypes.GetPInvokeMarshal(context).GetKnownMethod("ClearLastWin32Error", null)));
}
// make the call
DelegateMarshallingMethodThunk delegateMethod = _targetMethod as DelegateMarshallingMethodThunk;
if (delegateMethod != null)
{
EmitDelegateCall(delegateMethod, pInvokeILCodeStreams);
}
else
{
TypeDesc nativeReturnType = _marshallers[0].NativeParameterType;
TypeDesc[] nativeParameterTypes = new TypeDesc[_marshallers.Length - 1];
for (int i = 1; i < _marshallers.Length; i++)
{
nativeParameterTypes[i - 1] = _marshallers[i].NativeParameterType;
}
if (MarshalHelpers.UseLazyResolution(_targetMethod,
_importMetadata.Module,
_pInvokeILEmitterConfiguration))
{
MetadataType lazyHelperType = _targetMethod.Context.GetHelperType("InteropHelpers");
FieldDesc lazyDispatchCell = new PInvokeLazyFixupField(_targetMethod);
fnptrLoadStream.Emit(ILOpcode.ldsflda, emitter.NewToken(lazyDispatchCell));
fnptrLoadStream.Emit(ILOpcode.call, emitter.NewToken(lazyHelperType
.GetKnownMethod("ResolvePInvoke", null)));
MethodSignatureFlags unmanagedCallConv = _importMetadata.Flags.UnmanagedCallingConvention;
MethodSignature nativeSig = new MethodSignature(
_targetMethod.Signature.Flags | unmanagedCallConv, 0, nativeReturnType,
nativeParameterTypes);
ILLocalVariable vNativeFunctionPointer = emitter.NewLocal(_targetMethod.Context
.GetWellKnownType(WellKnownType.IntPtr));
fnptrLoadStream.EmitStLoc(vNativeFunctionPointer);
callsiteSetupCodeStream.EmitLdLoc(vNativeFunctionPointer);
callsiteSetupCodeStream.Emit(ILOpcode.calli, emitter.NewToken(nativeSig));
}
else
{
// Eager call
MethodSignature nativeSig = new MethodSignature(
_targetMethod.Signature.Flags, 0, nativeReturnType, nativeParameterTypes);
MethodDesc nativeMethod =
new PInvokeTargetNativeMethod(_targetMethod, nativeSig);
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(nativeMethod));
}
}
// if the SetLastError flag is set in DllImport, call the PInvokeMarshal.
// SaveLastWin32Error so that last error can be used later by calling
// PInvokeMarshal.GetLastWin32Error
if (_importMetadata.Flags.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
InteropTypes.GetPInvokeMarshal(context)
.GetKnownMethod("SaveLastWin32Error", null)));
}
unmarshallingCodestream.Emit(ILOpcode.ret);
return(new PInvokeILStubMethodIL((ILStubMethodIL)emitter.Link(_targetMethod),
IsStubRequired()));
}
private void EmitPInvokeCall(PInvokeILCodeStreams ilCodeStreams)
{
ILEmitter emitter = ilCodeStreams.Emitter;
ILCodeStream fnptrLoadStream = ilCodeStreams.FunctionPointerLoadStream;
ILCodeStream callsiteSetupCodeStream = ilCodeStreams.CallsiteSetupCodeStream;
TypeSystemContext context = _targetMethod.Context;
TypeDesc nativeReturnType = _marshallers[0].NativeParameterType;
TypeDesc[] nativeParameterTypes = new TypeDesc[_marshallers.Length - 1];
// if the SetLastError flag is set in DllImport, clear the error code before doing P/Invoke
if (_flags.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
InteropTypes.GetPInvokeMarshal(context).GetKnownMethod("ClearLastWin32Error", null)));
}
for (int i = 1; i < _marshallers.Length; i++)
{
nativeParameterTypes[i - 1] = _marshallers[i].NativeParameterType;
}
if (MarshalHelpers.UseLazyResolution(_targetMethod,
_importMetadata.Module,
_pInvokeILEmitterConfiguration))
{
MetadataType lazyHelperType = context.GetHelperType("InteropHelpers");
FieldDesc lazyDispatchCell = _interopStateManager.GetPInvokeLazyFixupField(_targetMethod);
fnptrLoadStream.Emit(ILOpcode.ldsflda, emitter.NewToken(lazyDispatchCell));
fnptrLoadStream.Emit(ILOpcode.call, emitter.NewToken(lazyHelperType
.GetKnownMethod("ResolvePInvoke", null)));
MethodSignatureFlags unmanagedCallConv = _flags.UnmanagedCallingConvention;
MethodSignature nativeSig = new MethodSignature(
_targetMethod.Signature.Flags | unmanagedCallConv, 0, nativeReturnType,
nativeParameterTypes);
ILLocalVariable vNativeFunctionPointer = emitter.NewLocal(context
.GetWellKnownType(WellKnownType.IntPtr));
fnptrLoadStream.EmitStLoc(vNativeFunctionPointer);
callsiteSetupCodeStream.EmitLdLoc(vNativeFunctionPointer);
callsiteSetupCodeStream.Emit(ILOpcode.calli, emitter.NewToken(nativeSig));
}
else
{
// Eager call
MethodSignature nativeSig = new MethodSignature(
_targetMethod.Signature.Flags, 0, nativeReturnType, nativeParameterTypes);
MethodDesc nativeMethod =
new PInvokeTargetNativeMethod(_targetMethod, nativeSig);
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(nativeMethod));
}
// if the SetLastError flag is set in DllImport, call the PInvokeMarshal.
// SaveLastWin32Error so that last error can be used later by calling
// PInvokeMarshal.GetLastWin32Error
if (_flags.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
InteropTypes.GetPInvokeMarshal(context)
.GetKnownMethod("SaveLastWin32Error", null)));
}
}
private void EmitDelegateCall(DelegateMarshallingMethodThunk delegateMethod, PInvokeILCodeStreams ilCodeStreams)
{
ILEmitter emitter = ilCodeStreams.Emitter;
ILCodeStream fnptrLoadStream = ilCodeStreams.FunctionPointerLoadStream;
ILCodeStream callsiteSetupCodeStream = ilCodeStreams.CallsiteSetupCodeStream;
TypeSystemContext context = _targetMethod.Context;
Debug.Assert(delegateMethod != null);
if (delegateMethod.Kind == DelegateMarshallingMethodThunkKind.ReverseOpenStatic)
{
//
// For Open static delegates call
// InteropHelpers.GetCurrentCalleeOpenStaticDelegateFunctionPointer()
// which returns a function pointer. Just call the function pointer and we are done.
//
TypeDesc[] parameters = new TypeDesc[_marshallers.Length - 1];
for (int i = 1; i < _marshallers.Length; i++)
{
parameters[i - 1] = _marshallers[i].ManagedParameterType;
}
MethodSignature managedSignature = new MethodSignature(
MethodSignatureFlags.Static, 0, _marshallers[0].ManagedParameterType, parameters);
fnptrLoadStream.Emit(ILOpcode.call, emitter.NewToken(
delegateMethod.Context.GetHelperType("InteropHelpers").GetKnownMethod(
"GetCurrentCalleeOpenStaticDelegateFunctionPointer", null)));
ILLocalVariable vDelegateStub = emitter.NewLocal(
delegateMethod.Context.GetWellKnownType(WellKnownType.IntPtr));
fnptrLoadStream.EmitStLoc(vDelegateStub);
callsiteSetupCodeStream.EmitLdLoc(vDelegateStub);
callsiteSetupCodeStream.Emit(ILOpcode.calli, emitter.NewToken(managedSignature));
}
else if (delegateMethod.Kind == DelegateMarshallingMethodThunkKind.ReverseClosed)
{
//
// For closed delegates call
// InteropHelpers.GetCurrentCalleeDelegate<Delegate>
// which returns the delegate. Do a CallVirt on the invoke method.
//
MethodDesc instantiatedHelper = delegateMethod.Context.GetInstantiatedMethod(
delegateMethod.Context.GetHelperType("InteropHelpers")
.GetKnownMethod("GetCurrentCalleeDelegate", null),
new Instantiation((delegateMethod.DelegateType)));
fnptrLoadStream.Emit(ILOpcode.call, emitter.NewToken(instantiatedHelper));
ILLocalVariable vDelegateStub = emitter.NewLocal(delegateMethod.DelegateType);
fnptrLoadStream.EmitStLoc(vDelegateStub);
fnptrLoadStream.EmitLdLoc(vDelegateStub);
MethodDesc invokeMethod = delegateMethod.DelegateType.GetKnownMethod("Invoke", null);
callsiteSetupCodeStream.Emit(ILOpcode.callvirt, emitter.NewToken(invokeMethod));
}
else if (delegateMethod.Kind == DelegateMarshallingMethodThunkKind
.ForwardNativeFunctionWrapper)
{
// if the SetLastError flag is set in UnmanagedFunctionPointerAttribute, clear the error code before doing P/Invoke
if (_flags.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
InteropTypes.GetPInvokeMarshal(context).GetKnownMethod("ClearLastWin32Error", null)));
}
//
// For NativeFunctionWrapper we need to load the native function and call it
//
fnptrLoadStream.EmitLdArg(0);
fnptrLoadStream.Emit(ILOpcode.call, emitter.NewToken(InteropTypes
.GetNativeFunctionPointerWrapper(context)
.GetMethod("get_NativeFunctionPointer", null)));
var fnPtr = emitter.NewLocal(
context.GetWellKnownType(WellKnownType.IntPtr));
fnptrLoadStream.EmitStLoc(fnPtr);
callsiteSetupCodeStream.EmitLdLoc(fnPtr);
TypeDesc nativeReturnType = _marshallers[0].NativeParameterType;
TypeDesc[] nativeParameterTypes = new TypeDesc[_marshallers.Length - 1];
for (int i = 1; i < _marshallers.Length; i++)
{
nativeParameterTypes[i - 1] = _marshallers[i].NativeParameterType;
}
MethodSignature nativeSig = new MethodSignature(
MethodSignatureFlags.Static | _flags.UnmanagedCallingConvention, 0, nativeReturnType, nativeParameterTypes);
callsiteSetupCodeStream.Emit(ILOpcode.calli, emitter.NewToken(nativeSig));
// if the SetLastError flag is set in UnmanagedFunctionPointerAttribute, call the PInvokeMarshal.
// SaveLastWin32Error so that last error can be used later by calling
// PInvokeMarshal.GetLastWin32Error
if (_flags.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
InteropTypes.GetPInvokeMarshal(context)
.GetKnownMethod("SaveLastWin32Error", null)));
}
}
else
{
Debug.Fail("Unexpected DelegateMarshallingMethodThunkKind");
}
}
private void EmitPInvokeCall(PInvokeILCodeStreams ilCodeStreams)
{
ILEmitter emitter = ilCodeStreams.Emitter;
ILCodeStream fnptrLoadStream = ilCodeStreams.FunctionPointerLoadStream;
ILCodeStream callsiteSetupCodeStream = ilCodeStreams.CallsiteSetupCodeStream;
TypeSystemContext context = _targetMethod.Context;
bool isHRSwappedRetVal = !_flags.PreserveSig && !_targetMethod.Signature.ReturnType.IsVoid;
TypeDesc nativeReturnType = _flags.PreserveSig ? _marshallers[0].NativeParameterType : context.GetWellKnownType(WellKnownType.Int32);
TypeDesc[] nativeParameterTypes = new TypeDesc[isHRSwappedRetVal ? _marshallers.Length : _marshallers.Length - 1];
bool runtimeMarshallingEnabled = MarshalHelpers.IsRuntimeMarshallingEnabled(((MetadataType)_targetMethod.OwningType).Module);
// if the SetLastError flag is set in DllImport, clear the error code before doing P/Invoke
if (_flags.SetLastError)
{
if (!runtimeMarshallingEnabled)
{
// When runtime marshalling is disabled, we don't support SetLastError
throw new NotSupportedException();
}
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
InteropTypes.GetPInvokeMarshal(context).GetKnownMethod("ClearLastError", null)));
}
for (int i = 1; i < _marshallers.Length; i++)
{
nativeParameterTypes[i - 1] = _marshallers[i].NativeParameterType;
}
if (isHRSwappedRetVal)
{
if (!runtimeMarshallingEnabled)
{
// When runtime marshalling is disabled, we don't support HResult-return-swapping
throw new NotSupportedException();
}
nativeParameterTypes[_marshallers.Length - 1] = _marshallers[0].NativeParameterType;
}
if (!_pInvokeILEmitterConfiguration.GenerateDirectCall(_targetMethod, out _))
{
MetadataType lazyHelperType = context.GetHelperType("InteropHelpers");
FieldDesc lazyDispatchCell = _interopStateManager.GetPInvokeLazyFixupField(_targetMethod);
fnptrLoadStream.Emit(ILOpcode.ldsflda, emitter.NewToken(lazyDispatchCell));
fnptrLoadStream.Emit(ILOpcode.call, emitter.NewToken(lazyHelperType
.GetKnownMethod("ResolvePInvoke", null)));
MethodSignature nativeSig = new MethodSignature(
MethodSignatureFlags.Static | MethodSignatureFlags.UnmanagedCallingConvention, 0, nativeReturnType, nativeParameterTypes,
_targetMethod.GetPInvokeMethodCallingConventions().EncodeAsEmbeddedSignatureData(context));
ILLocalVariable vNativeFunctionPointer = emitter.NewLocal(context
.GetWellKnownType(WellKnownType.IntPtr));
fnptrLoadStream.EmitStLoc(vNativeFunctionPointer);
callsiteSetupCodeStream.EmitLdLoc(vNativeFunctionPointer);
callsiteSetupCodeStream.Emit(ILOpcode.calli, emitter.NewToken(nativeSig));
}
else
{
// Eager call
MethodSignature nativeSig = new MethodSignature(
_targetMethod.Signature.Flags, 0, nativeReturnType, nativeParameterTypes);
MethodDesc nativeMethod =
new PInvokeTargetNativeMethod(_targetMethod, nativeSig);
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(nativeMethod));
}
if (!_flags.PreserveSig)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
InteropTypes.GetMarshal(context)
.GetKnownMethod("ThrowExceptionForHR", null)));
}
// if the SetLastError flag is set in DllImport, call the PInvokeMarshal.SaveLastError
// so that last error can be used later by calling Marshal.GetLastPInvokeError
if (_flags.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
InteropTypes.GetPInvokeMarshal(context)
.GetKnownMethod("SaveLastError", null)));
}
}
private MethodIL EmitIL()
{
PInvokeILCodeStreams pInvokeILCodeStreams = new PInvokeILCodeStreams();
ILEmitter emitter = pInvokeILCodeStreams.Emitter;
ILCodeStream fnptrLoadStream = pInvokeILCodeStreams.FunctionPointerLoadStream;
ILCodeStream callsiteSetupCodeStream = pInvokeILCodeStreams.CallsiteSetupCodeStream;
ILCodeStream unmarshallingCodestream = pInvokeILCodeStreams.UnmarshallingCodestream;
TypeSystemContext context = _targetMethod.Context;
// Marshal the arguments
for (int i = 0; i < _marshallers.Length; i++)
{
_marshallers[i].EmitMarshallingIL(pInvokeILCodeStreams);
}
// make the call
TypeDesc nativeReturnType = _marshallers[0].NativeParameterType;
TypeDesc[] nativeParameterTypes = new TypeDesc[_marshallers.Length - 1];
for (int i = 1; i < _marshallers.Length; i++)
{
nativeParameterTypes[i - 1] = _marshallers[i].NativeParameterType;
}
MethodSignature nativeSig;
// if the SetLastError flag is set in DllImport, clear the error code before doing P/Invoke
if (_importMetadata.Flags.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
InteropTypes.GetPInvokeMarshal(context).GetKnownMethod("ClearLastWin32Error", null)));
}
DelegateMarshallingMethodThunk delegateMethod = _targetMethod as DelegateMarshallingMethodThunk;
if (delegateMethod != null)
{
if (delegateMethod.IsOpenStaticDelegate)
{
//
// For Open static delegates call
// InteropHelpers.GetCurrentCalleeOpenStaticDelegateFunctionPointer()
// which returns a function pointer. Just call the function pointer and we are done.
//
TypeDesc[] parameters = new TypeDesc[_marshallers.Length - 1];
for (int i = 1; i < _marshallers.Length; i++)
{
parameters[i - 1] = _marshallers[i].ManagedParameterType;
}
MethodSignature managedSignature = new MethodSignature(MethodSignatureFlags.Static, 0, _marshallers[0].ManagedParameterType, parameters);
fnptrLoadStream.Emit(ILOpcode.call, emitter.NewToken(delegateMethod.Context.GetHelperType("InteropHelpers").GetKnownMethod("GetCurrentCalleeOpenStaticDelegateFunctionPointer", null)));
ILLocalVariable vDelegateStub = emitter.NewLocal(delegateMethod.Context.GetWellKnownType(WellKnownType.IntPtr));
fnptrLoadStream.EmitStLoc(vDelegateStub);
callsiteSetupCodeStream.EmitLdLoc(vDelegateStub);
callsiteSetupCodeStream.Emit(ILOpcode.calli, emitter.NewToken(managedSignature));
}
else
{
//
// For closed delegates call
// InteropHelpers.GetCurrentCalleeDelegate<Delegate>
// which returns the delegate. Do a CallVirt on the invoke method.
//
MethodDesc instantiatedHelper = delegateMethod.Context.GetInstantiatedMethod(
delegateMethod.Context.GetHelperType("InteropHelpers").GetKnownMethod("GetCurrentCalleeDelegate", null),
new Instantiation((delegateMethod.DelegateType)));
fnptrLoadStream.Emit(ILOpcode.call, emitter.NewToken(instantiatedHelper));
ILLocalVariable vDelegateStub = emitter.NewLocal(delegateMethod.DelegateType);
fnptrLoadStream.EmitStLoc(vDelegateStub);
fnptrLoadStream.EmitLdLoc(vDelegateStub);
MethodDesc invokeMethod = delegateMethod.DelegateType.GetKnownMethod("Invoke", null);
callsiteSetupCodeStream.Emit(ILOpcode.callvirt, emitter.NewToken(invokeMethod));
}
}
else if (MarshalHelpers.UseLazyResolution(_targetMethod, _importMetadata.Module, _pInvokeILEmitterConfiguration))
{
MetadataType lazyHelperType = _targetMethod.Context.GetHelperType("InteropHelpers");
FieldDesc lazyDispatchCell = new PInvokeLazyFixupField((DefType)_targetMethod.OwningType, _importMetadata);
fnptrLoadStream.Emit(ILOpcode.ldsflda, emitter.NewToken(lazyDispatchCell));
fnptrLoadStream.Emit(ILOpcode.call, emitter.NewToken(lazyHelperType.GetKnownMethod("ResolvePInvoke", null)));
MethodSignatureFlags unmanagedCallConv = _importMetadata.Flags.UnmanagedCallingConvention;
nativeSig = new MethodSignature(
_targetMethod.Signature.Flags | unmanagedCallConv, 0, nativeReturnType, nativeParameterTypes);
ILLocalVariable vNativeFunctionPointer = emitter.NewLocal(_targetMethod.Context.GetWellKnownType(WellKnownType.IntPtr));
fnptrLoadStream.EmitStLoc(vNativeFunctionPointer);
callsiteSetupCodeStream.EmitLdLoc(vNativeFunctionPointer);
callsiteSetupCodeStream.Emit(ILOpcode.calli, emitter.NewToken(nativeSig));
}
else
{
// Eager call
PInvokeMetadata nativeImportMetadata =
new PInvokeMetadata(_importMetadata.Module, _importMetadata.Name ?? _targetMethod.Name, _importMetadata.Flags);
nativeSig = new MethodSignature(
_targetMethod.Signature.Flags, 0, nativeReturnType, nativeParameterTypes);
MethodDesc nativeMethod =
new PInvokeTargetNativeMethod(_targetMethod.OwningType, nativeSig, nativeImportMetadata, _pInvokeILEmitterConfiguration.GetNextNativeMethodId());
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(nativeMethod));
}
// if the SetLastError flag is set in DllImport, call the PInvokeMarshal.SaveLastWin32Error so that last error can be used later
// by calling PInvokeMarshal.GetLastWin32Error
if (_importMetadata.Flags.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
InteropTypes.GetPInvokeMarshal(context).GetKnownMethod("SaveLastWin32Error", null)));
}
unmarshallingCodestream.Emit(ILOpcode.ret);
return(new PInvokeILStubMethodIL((ILStubMethodIL)emitter.Link(_targetMethod), IsStubRequired()));
}
private MethodIL EmitMarshallingIL(PInvokeILCodeStreams pInvokeILCodeStreams)
{
Marshaller[] marshallers = InitializeMarshallers();
ILEmitter emitter = pInvokeILCodeStreams.Emitter;
IEnumerator <FieldDesc> nativeEnumerator = NativeType.GetFields().GetEnumerator();
int index = 0;
foreach (var managedField in ManagedType.GetFields())
{
if (managedField.IsStatic)
{
continue;
}
bool notEmpty = nativeEnumerator.MoveNext();
Debug.Assert(notEmpty == true);
var nativeField = nativeEnumerator.Current;
Debug.Assert(nativeField != null);
bool isInlineArray = nativeField.FieldType is InlineArrayType;
//
// Field marshallers expects the value of the fields to be
// loaded on the stack. We load the value on the stack
// before calling the marshallers.
// Only exception is ByValArray marshallers. Since they can
// only be used for field marshalling, they load/store values
// directly from arguments.
//
if (isInlineArray)
{
var byValMarshaller = marshallers[index++] as ByValArrayMarshaller;
Debug.Assert(byValMarshaller != null);
byValMarshaller.EmitMarshallingIL(pInvokeILCodeStreams, managedField, nativeField);
}
else
{
if (ThunkType == StructMarshallingThunkType.ManagedToNative)
{
LoadFieldValueFromArg(0, managedField, pInvokeILCodeStreams);
}
else if (ThunkType == StructMarshallingThunkType.NativeToManaged)
{
LoadFieldValueFromArg(0, nativeField, pInvokeILCodeStreams);
}
marshallers[index++].EmitMarshallingIL(pInvokeILCodeStreams);
if (ThunkType == StructMarshallingThunkType.ManagedToNative)
{
StoreFieldValueFromArg(1, nativeField, pInvokeILCodeStreams);
}
else if (ThunkType == StructMarshallingThunkType.NativeToManaged)
{
StoreFieldValueFromArg(1, managedField, pInvokeILCodeStreams);
}
}
}
Debug.Assert(!nativeEnumerator.MoveNext());
pInvokeILCodeStreams.UnmarshallingCodestream.Emit(ILOpcode.ret);
return(emitter.Link(this));
}
public override MethodIL EmitIL()
{
try
{
Debug.Assert(_interopStateManager != null);
Marshaller[] marshallers = new Marshaller[GetNumberOfInstanceFields()];
MarshalAsDescriptor[] marshalAsDescriptors = ((MetadataType)ManagedType).GetFieldMarshalAsDescriptors();
PInvokeFlags flags = new PInvokeFlags();
if (ManagedType.PInvokeStringFormat == PInvokeStringFormat.UnicodeClass || ManagedType.PInvokeStringFormat == PInvokeStringFormat.AutoClass)
{
flags.CharSet = CharSet.Unicode;
}
else
{
flags.CharSet = CharSet.Ansi;
}
int index = 0;
foreach (FieldDesc field in ManagedType.GetFields())
{
if (field.IsStatic)
{
continue;
}
marshallers[index] = Marshaller.CreateMarshaller(field.FieldType,
MarshallerType.Field,
marshalAsDescriptors[index],
(ThunkType == StructMarshallingThunkType.NativeToManage) ? MarshalDirection.Reverse : MarshalDirection.Forward,
marshallers,
_interopStateManager,
index,
flags,
isIn: true, /* Struct fields are considered as IN within the helper*/
isOut: false,
isReturn: false);
index++;
}
PInvokeILCodeStreams pInvokeILCodeStreams = new PInvokeILCodeStreams();
if (ThunkType == StructMarshallingThunkType.Cleanup)
{
return(EmitCleanupIL(pInvokeILCodeStreams, marshallers));
}
else
{
return(EmitMarshallingIL(pInvokeILCodeStreams, marshallers));
}
}
catch (NotSupportedException)
{
string message = "Struct '" + ((MetadataType)ManagedType).Name +
"' requires non-trivial marshalling that is not yet supported by this compiler.";
return(MarshalHelpers.EmitExceptionBody(message, this));
}
catch (InvalidProgramException ex)
{
Debug.Assert(!String.IsNullOrEmpty(ex.Message));
return(MarshalHelpers.EmitExceptionBody(ex.Message, this));
}
}
private MethodIL EmitIL()
{
PInvokeILCodeStreams pInvokeILCodeStreams = new PInvokeILCodeStreams();
ILEmitter emitter = pInvokeILCodeStreams.Emitter;
ILCodeStream fnptrLoadStream = pInvokeILCodeStreams.FunctionPointerLoadStream;
ILCodeStream callsiteSetupCodeStream = pInvokeILCodeStreams.CallsiteSetupCodeStream;
ILCodeStream unmarshallingCodestream = pInvokeILCodeStreams.UnmarshallingCodestream;
// Marshal the arguments
for (int i = 0; i < _marshallers.Length; i++)
{
_marshallers[i].EmitMarshallingIL(pInvokeILCodeStreams);
}
// make the call
TypeDesc nativeReturnType = _marshallers[0].NativeParameterType;
TypeDesc[] nativeParameterTypes = new TypeDesc[_marshallers.Length - 1];
for (int i = 1; i < _marshallers.Length; i++)
{
nativeParameterTypes[i - 1] = _marshallers[i].NativeParameterType;
}
MethodDesc targetMethod = _methodData.TargetMethod;
PInvokeMetadata importMetadata = _methodData.ImportMetadata;
PInvokeILEmitterConfiguration pinvokeILEmitterConfiguration = _methodData.PInvokeILEmitterConfiguration;
MethodSignature nativeSig;
// if the SetLastError flag is set in DllImport, clear the error code before doing P/Invoke
if ((importMetadata.Attributes & PInvokeAttributes.SetLastError) == PInvokeAttributes.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
_methodData.PInvokeMarshal.GetKnownMethod("ClearLastWin32Error", null)));
}
if (targetMethod is DelegateMarshallingMethodThunk)
{
nativeSig = new MethodSignature(MethodSignatureFlags.Static, 0, nativeReturnType, nativeParameterTypes);
TypeDesc[] parameters = new TypeDesc[_marshallers.Length - 1];
for (int i = 1; i < _marshallers.Length; i++)
{
parameters[i - 1] = _marshallers[i].ManagedParameterType;
}
MethodSignature managedSignature = new MethodSignature(MethodSignatureFlags.Static, 0, _marshallers[0].ManagedParameterType, parameters);
fnptrLoadStream.Emit(ILOpcode.call, emitter.NewToken(targetMethod.Context.GetHelperType("InteropHelpers").GetKnownMethod("GetDelegateFunctionPointer", null)));
ILLocalVariable vDelegateStub = emitter.NewLocal(targetMethod.Context.GetWellKnownType(WellKnownType.IntPtr));
fnptrLoadStream.EmitStLoc(vDelegateStub);
callsiteSetupCodeStream.EmitLdLoc(vDelegateStub);
callsiteSetupCodeStream.Emit(ILOpcode.calli, emitter.NewToken(managedSignature));
}
else if (MarshalHelpers.UseLazyResolution(targetMethod, importMetadata.Module, pinvokeILEmitterConfiguration))
{
MetadataType lazyHelperType = targetMethod.Context.GetHelperType("InteropHelpers");
FieldDesc lazyDispatchCell = new PInvokeLazyFixupField((DefType)targetMethod.OwningType, importMetadata);
fnptrLoadStream.Emit(ILOpcode.ldsflda, emitter.NewToken(lazyDispatchCell));
fnptrLoadStream.Emit(ILOpcode.call, emitter.NewToken(lazyHelperType.GetKnownMethod("ResolvePInvoke", null)));
MethodSignatureFlags unmanagedCallConv = PInvokeMetadata.GetUnmanagedCallingConvention(importMetadata.Attributes);
nativeSig = new MethodSignature(
targetMethod.Signature.Flags | unmanagedCallConv, 0, nativeReturnType, nativeParameterTypes);
ILLocalVariable vNativeFunctionPointer = emitter.NewLocal(targetMethod.Context.GetWellKnownType(WellKnownType.IntPtr));
fnptrLoadStream.EmitStLoc(vNativeFunctionPointer);
callsiteSetupCodeStream.EmitLdLoc(vNativeFunctionPointer);
callsiteSetupCodeStream.Emit(ILOpcode.calli, emitter.NewToken(nativeSig));
}
else
{
// Eager call
PInvokeMetadata nativeImportMetadata =
new PInvokeMetadata(importMetadata.Module, importMetadata.Name ?? targetMethod.Name, importMetadata.Attributes);
nativeSig = new MethodSignature(
targetMethod.Signature.Flags, 0, nativeReturnType, nativeParameterTypes);
MethodDesc nativeMethod =
new PInvokeTargetNativeMethod(targetMethod.OwningType, nativeSig, nativeImportMetadata, pinvokeILEmitterConfiguration.GetNextNativeMethodId());
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(nativeMethod));
}
// if the SetLastError flag is set in DllImport, call the PInvokeMarshal.SaveLastWin32Error so that last error can be used later
// by calling PInvokeMarshal.GetLastWin32Error
if ((importMetadata.Attributes & PInvokeAttributes.SetLastError) == PInvokeAttributes.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
_methodData.PInvokeMarshal.GetKnownMethod("SaveLastWin32Error", null)));
}
unmarshallingCodestream.Emit(ILOpcode.ret);
return(new PInvokeILStubMethodIL((ILStubMethodIL)emitter.Link(targetMethod), IsStubRequired(), nativeSig));
}
private void EmitPInvokeCall(PInvokeILCodeStreams ilCodeStreams)
{
ILEmitter emitter = ilCodeStreams.Emitter;
ILCodeStream fnptrLoadStream = ilCodeStreams.FunctionPointerLoadStream;
ILCodeStream callsiteSetupCodeStream = ilCodeStreams.CallsiteSetupCodeStream;
TypeSystemContext context = _targetMethod.Context;
bool isHRSwappedRetVal = !_flags.PreserveSig && !_targetMethod.Signature.ReturnType.IsVoid;
TypeDesc nativeReturnType = _flags.PreserveSig ? _marshallers[0].NativeParameterType : context.GetWellKnownType(WellKnownType.Int32);
TypeDesc[] nativeParameterTypes = new TypeDesc[isHRSwappedRetVal ? _marshallers.Length : _marshallers.Length - 1];
// if the SetLastError flag is set in DllImport, clear the error code before doing P/Invoke
if (_flags.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
InteropTypes.GetPInvokeMarshal(context).GetKnownMethod("ClearLastError", null)));
}
for (int i = 1; i < _marshallers.Length; i++)
{
nativeParameterTypes[i - 1] = _marshallers[i].NativeParameterType;
}
if (isHRSwappedRetVal)
{
nativeParameterTypes[_marshallers.Length - 1] = _marshallers[0].NativeParameterType;
}
if (!_pInvokeILEmitterConfiguration.GenerateDirectCall(_targetMethod, out _))
{
MetadataType lazyHelperType = context.GetHelperType("InteropHelpers");
FieldDesc lazyDispatchCell = _interopStateManager.GetPInvokeLazyFixupField(_targetMethod);
fnptrLoadStream.Emit(ILOpcode.ldsflda, emitter.NewToken(lazyDispatchCell));
fnptrLoadStream.Emit(ILOpcode.call, emitter.NewToken(lazyHelperType
.GetKnownMethod("ResolvePInvoke", null)));
MethodSignatureFlags unmanagedCallingConvention = _flags.UnmanagedCallingConvention;
if (unmanagedCallingConvention == MethodSignatureFlags.None)
{
unmanagedCallingConvention = MethodSignatureFlags.UnmanagedCallingConvention;
}
EmbeddedSignatureData[] embeddedSignatureData = null;
if (_targetMethod.HasCustomAttribute("System.Runtime.InteropServices", "SuppressGCTransitionAttribute"))
{
embeddedSignatureData = new EmbeddedSignatureData[]
{
new EmbeddedSignatureData()
{
index = MethodSignature.IndexOfCustomModifiersOnReturnType,
kind = EmbeddedSignatureDataKind.OptionalCustomModifier,
type = context.SystemModule.GetKnownType("System.Runtime.CompilerServices", "CallConvSuppressGCTransition")
}
};
}
MethodSignature nativeSig = new MethodSignature(
_targetMethod.Signature.Flags | unmanagedCallingConvention, 0, nativeReturnType,
nativeParameterTypes, embeddedSignatureData);
ILLocalVariable vNativeFunctionPointer = emitter.NewLocal(context
.GetWellKnownType(WellKnownType.IntPtr));
fnptrLoadStream.EmitStLoc(vNativeFunctionPointer);
callsiteSetupCodeStream.EmitLdLoc(vNativeFunctionPointer);
callsiteSetupCodeStream.Emit(ILOpcode.calli, emitter.NewToken(nativeSig));
}
else
{
// Eager call
MethodSignature nativeSig = new MethodSignature(
_targetMethod.Signature.Flags, 0, nativeReturnType, nativeParameterTypes);
MethodDesc nativeMethod =
new PInvokeTargetNativeMethod(_targetMethod, nativeSig);
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(nativeMethod));
}
if (!_flags.PreserveSig)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
InteropTypes.GetMarshal(context)
.GetKnownMethod("ThrowExceptionForHR", null)));
}
// if the SetLastError flag is set in DllImport, call the PInvokeMarshal.SaveLastError
// so that last error can be used later by calling Marshal.GetLastPInvokeError
if (_flags.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
InteropTypes.GetPInvokeMarshal(context)
.GetKnownMethod("SaveLastError", null)));
}
}
