internal abstract Cci.ITypeReference Translate(ITypeSymbolInternal symbol, SyntaxNode syntaxOpt, DiagnosticBag diagnostics);
internal sealed override Cci.ITypeReference EncTranslateType(ITypeSymbolInternal type, DiagnosticBag diagnostics)
{
return(EncTranslateLocalVariableType((TTypeSymbol)type, diagnostics));
}
internal sealed override Cci.ITypeReference Translate(ITypeSymbolInternal symbol, SyntaxNode syntaxNodeOpt, DiagnosticBag diagnostics)
{
return(Translate((TTypeSymbol)symbol, (TSyntaxNode)syntaxNodeOpt, diagnostics));
}
private static void DecodeMarshalAsSafeArray(ref DecodeWellKnownAttributeArguments <TAttributeSyntax, TAttributeData, TAttributeLocation> arguments, CommonMessageProvider messageProvider)
{
Debug.Assert((object)arguments.AttributeSyntaxOpt != null);
Cci.VarEnum? elementTypeVariant = null;
ITypeSymbolInternal elementTypeSymbol = null;
int symbolIndex = -1;
bool hasErrors = false;
int position = 1;
foreach (var namedArg in arguments.Attribute.NamedArguments)
{
switch (namedArg.Key)
{
case "SafeArraySubType":
elementTypeVariant = namedArg.Value.DecodeValue <Cci.VarEnum>(SpecialType.System_Enum);
if (elementTypeVariant < 0 || (int)elementTypeVariant > MarshalPseudoCustomAttributeData.MaxMarshalInteger)
{
messageProvider.ReportInvalidNamedArgument(arguments.Diagnostics, arguments.AttributeSyntaxOpt, position, arguments.Attribute.AttributeClass, namedArg.Key);
hasErrors = true;
}
break;
case "SafeArrayUserDefinedSubType":
elementTypeSymbol = namedArg.Value.DecodeValue <ITypeSymbolInternal>(SpecialType.None);
symbolIndex = position;
break;
case "ArraySubType":
case "SizeConst":
case "SizeParamIndex":
messageProvider.ReportParameterNotValidForType(arguments.Diagnostics, arguments.AttributeSyntaxOpt, position);
hasErrors = true;
break;
// other parameters ignored with no error
}
position++;
}
switch (elementTypeVariant)
{
case Cci.VarEnum.VT_DISPATCH:
case Cci.VarEnum.VT_UNKNOWN:
case Cci.VarEnum.VT_RECORD:
// only these variants accept specification of user defined subtype
break;
default:
if (elementTypeVariant != null && symbolIndex >= 0)
{
messageProvider.ReportParameterNotValidForType(arguments.Diagnostics, arguments.AttributeSyntaxOpt, symbolIndex);
hasErrors = true;
}
else
{
// type ignored:
elementTypeSymbol = null;
}
break;
}
if (!hasErrors)
{
arguments.GetOrCreateData <TWellKnownAttributeData>().GetOrCreateData().SetMarshalAsSafeArray(elementTypeVariant, elementTypeSymbol);
}
}
internal abstract Cci.ITypeReference EncTranslateType(ITypeSymbolInternal type, DiagnosticBag diagnostics);
internal VariableSlotAllocator TryCreateVariableSlotAllocator(EmitBaseline baseline, Compilation compilation, IMethodSymbolInternal method, IMethodSymbolInternal topLevelMethod, DiagnosticBag diagnostics)
{
// Top-level methods are always included in the semantic edit list. Lambda methods are not.
MappedMethod mappedMethod;
if (!mappedMethods.TryGetValue(topLevelMethod, out mappedMethod))
{
return(null);
}
// TODO (bug https://github.com/dotnet/roslyn/issues/2504):
// Handle cases when the previous method doesn't exist.
MethodDefinitionHandle previousHandle;
if (!TryGetMethodHandle(baseline, (Cci.IMethodDefinition)method.GetCciAdapter(), out previousHandle))
{
// Unrecognized method. Must have been added in the current compilation.
return(null);
}
ImmutableArray <EncLocalInfo> previousLocals;
IReadOnlyDictionary <EncHoistedLocalInfo, int> hoistedLocalMap = null;
IReadOnlyDictionary <Cci.ITypeReference, int> awaiterMap = null;
IReadOnlyDictionary <int, KeyValuePair <DebugId, int> > lambdaMap = null;
IReadOnlyDictionary <int, DebugId> closureMap = null;
int hoistedLocalSlotCount = 0;
int awaiterSlotCount = 0;
string stateMachineTypeNameOpt = null;
SymbolMatcher symbolMap;
int methodIndex = MetadataTokens.GetRowNumber(previousHandle);
DebugId methodId;
// Check if method has changed previously. If so, we already have a map.
AddedOrChangedMethodInfo addedOrChangedMethod;
if (baseline.AddedOrChangedMethods.TryGetValue(methodIndex, out addedOrChangedMethod))
{
methodId = addedOrChangedMethod.MethodId;
MakeLambdaAndClosureMaps(addedOrChangedMethod.LambdaDebugInfo, addedOrChangedMethod.ClosureDebugInfo, out lambdaMap, out closureMap);
if (addedOrChangedMethod.StateMachineTypeNameOpt != null)
{
// method is async/iterator kickoff method
GetStateMachineFieldMapFromPreviousCompilation(
addedOrChangedMethod.StateMachineHoistedLocalSlotsOpt,
addedOrChangedMethod.StateMachineAwaiterSlotsOpt,
out hoistedLocalMap,
out awaiterMap);
hoistedLocalSlotCount = addedOrChangedMethod.StateMachineHoistedLocalSlotsOpt.Length;
awaiterSlotCount = addedOrChangedMethod.StateMachineAwaiterSlotsOpt.Length;
// Kickoff method has no interesting locals on its own.
// We use the EnC method debug information for hoisted locals.
previousLocals = ImmutableArray <EncLocalInfo> .Empty;
stateMachineTypeNameOpt = addedOrChangedMethod.StateMachineTypeNameOpt;
}
else
{
previousLocals = addedOrChangedMethod.Locals;
}
// All types that AddedOrChangedMethodInfo refers to have been mapped to the previous generation.
// Therefore we don't need to fall back to metadata if we don't find the type reference, like we do in DefinitionMap.MapReference.
symbolMap = MapToPreviousSymbolMatcher;
}
else
{
// Method has not changed since initial generation. Generate a map
// using the local names provided with the initial metadata.
EditAndContinueMethodDebugInformation debugInfo;
StandaloneSignatureHandle localSignature;
try
{
debugInfo = baseline.DebugInformationProvider(previousHandle);
localSignature = baseline.LocalSignatureProvider(previousHandle);
}
catch (Exception e) when(e is InvalidDataException || e is IOException)
{
diagnostics.Add(MessageProvider.CreateDiagnostic(
MessageProvider.ERR_InvalidDebugInfo,
method.Locations.First(),
method,
MetadataTokens.GetToken(previousHandle),
method.ContainingAssembly
));
return(null);
}
methodId = new DebugId(debugInfo.MethodOrdinal, 0);
if (!debugInfo.Lambdas.IsDefaultOrEmpty)
{
MakeLambdaAndClosureMaps(debugInfo.Lambdas, debugInfo.Closures, out lambdaMap, out closureMap);
}
ITypeSymbolInternal stateMachineType = TryGetStateMachineType(previousHandle);
if (stateMachineType != null)
{
// method is async/iterator kickoff method
var localSlotDebugInfo = debugInfo.LocalSlots.NullToEmpty();
GetStateMachineFieldMapFromMetadata(stateMachineType, localSlotDebugInfo, out hoistedLocalMap, out awaiterMap, out awaiterSlotCount);
hoistedLocalSlotCount = localSlotDebugInfo.Length;
// Kickoff method has no interesting locals on its own.
// We use the EnC method debug information for hoisted locals.
previousLocals = ImmutableArray <EncLocalInfo> .Empty;
stateMachineTypeNameOpt = stateMachineType.Name;
}
else
{
// If the current method is async/iterator then either the previous method wasn't declared as async/iterator and it's updated to be one,
// or it was but is not marked by the corresponding state machine attribute because it was missing in the compilation.
// In the later case we need to report an error since we don't known how to map to the previous state machine.
// The IDE already checked that the attribute type is present in the base compilation, but didn't validate that it is well-formed.
// We don't have the base compilation to directly query for the attribute, only the source compilation.
// But since constructor signatures can't be updated during EnC we can just check the current compilation.
if (method.IsAsync)
{
if (compilation.CommonGetWellKnownTypeMember(WellKnownMember.System_Runtime_CompilerServices_AsyncStateMachineAttribute__ctor) == null)
{
ReportMissingStateMachineAttribute(diagnostics, method, AttributeDescription.AsyncStateMachineAttribute.FullName);
return(null);
}
}
else if (method.IsIterator)
{
if (compilation.CommonGetWellKnownTypeMember(WellKnownMember.System_Runtime_CompilerServices_IteratorStateMachineAttribute__ctor) == null)
{
ReportMissingStateMachineAttribute(diagnostics, method, AttributeDescription.IteratorStateMachineAttribute.FullName);
return(null);
}
}
try
{
previousLocals = localSignature.IsNil ? ImmutableArray <EncLocalInfo> .Empty :
GetLocalSlotMapFromMetadata(localSignature, debugInfo);
}
catch (Exception e) when(e is UnsupportedSignatureContent || e is BadImageFormatException || e is IOException)
{
diagnostics.Add(MessageProvider.CreateDiagnostic(
MessageProvider.ERR_InvalidDebugInfo,
method.Locations.First(),
method,
MetadataTokens.GetToken(localSignature),
method.ContainingAssembly
));
return(null);
}
}
symbolMap = MapToMetadataSymbolMatcher;
}
return(new EncVariableSlotAllocator(
symbolMap,
mappedMethod.SyntaxMap,
mappedMethod.PreviousMethod,
methodId,
previousLocals,
lambdaMap,
closureMap,
stateMachineTypeNameOpt,
hoistedLocalSlotCount,
hoistedLocalMap,
awaiterSlotCount,
awaiterMap,
GetLambdaSyntaxFacts()));
}
private static MetadataConstant CreateMetadataConstant(ITypeSymbolInternal type, object value, EmitContext context)
{
PEModuleBuilder moduleBeingBuilt = (PEModuleBuilder)context.Module;
return(moduleBeingBuilt.CreateConstant((TypeSymbol)type, value, syntaxNodeOpt: (CSharpSyntaxNode)context.SyntaxNode, diagnostics: context.Diagnostics));
}
protected abstract void GetStateMachineFieldMapFromMetadata(
ITypeSymbolInternal stateMachineType,
ImmutableArray <LocalSlotDebugInfo> localSlotDebugInfo,
out IReadOnlyDictionary <EncHoistedLocalInfo, int> hoistedLocalMap,
out IReadOnlyDictionary <Cci.ITypeReference, int> awaiterMap,
out int awaiterSlotCount);
internal override bool IsSystemTypeReference(ITypeSymbolInternal type)
{
return(TypeSymbol.Equals((TypeSymbol)type, GetWellKnownType(WellKnownType.System_Type), TypeCompareKind.ConsiderEverything2));
}
protected override void GetStateMachineFieldMapFromMetadata(
ITypeSymbolInternal stateMachineType,
ImmutableArray <LocalSlotDebugInfo> localSlotDebugInfo,
out IReadOnlyDictionary <EncHoistedLocalInfo, int> hoistedLocalMap,
out IReadOnlyDictionary <Cci.ITypeReference, int> awaiterMap,
out int awaiterSlotCount)
{
// we are working with PE symbols
Debug.Assert(stateMachineType.ContainingAssembly is PEAssemblySymbol);
var hoistedLocals = new Dictionary <EncHoistedLocalInfo, int>();
var awaiters = new Dictionary <Cci.ITypeReference, int>();
int maxAwaiterSlotIndex = -1;
foreach (var member in ((TypeSymbol)stateMachineType).GetMembers())
{
if (member.Kind == SymbolKind.Field)
{
string name = member.Name;
int slotIndex;
switch (GeneratedNames.GetKind(name))
{
case GeneratedNameKind.AwaiterField:
if (GeneratedNames.TryParseSlotIndex(name, out slotIndex))
{
var field = (FieldSymbol)member;
// correct metadata won't contain duplicates, but malformed might, ignore the duplicate:
awaiters[(Cci.ITypeReference)field.Type] = slotIndex;
if (slotIndex > maxAwaiterSlotIndex)
{
maxAwaiterSlotIndex = slotIndex;
}
}
break;
case GeneratedNameKind.HoistedLocalField:
case GeneratedNameKind.HoistedSynthesizedLocalField:
if (GeneratedNames.TryParseSlotIndex(name, out slotIndex))
{
var field = (FieldSymbol)member;
if (slotIndex >= localSlotDebugInfo.Length)
{
// invalid or missing metadata
continue;
}
var key = new EncHoistedLocalInfo(localSlotDebugInfo[slotIndex], (Cci.ITypeReference)field.Type);
// correct metadata won't contain duplicate ids, but malformed might, ignore the duplicate:
hoistedLocals[key] = slotIndex;
}
break;
}
}
}
hoistedLocalMap = hoistedLocals;
awaiterMap = awaiters;
awaiterSlotCount = maxAwaiterSlotIndex + 1;
}
internal TypedConstant(ITypeSymbolInternal type, ImmutableArray <TypedConstant> array)
: this(type, TypedConstantKind.Array, value : array.IsDefault ? null : (object)array)
{
}
internal override bool IsSystemTypeReference(ITypeSymbolInternal type)
{
return((TypeSymbol)type == GetWellKnownType(WellKnownType.System_Type));
}