internal MetadataModule(ICompilation compilation, Metadata.PEFile peFile, TypeSystemOptions options)
{
this.Compilation = compilation;
this.PEFile = peFile;
this.metadata = peFile.Metadata;
this.options = options;
this.TypeProvider = new TypeProvider(this);
// assembly metadata
if (metadata.IsAssembly)
{
var asmdef = metadata.GetAssemblyDefinition();
this.AssemblyName = metadata.GetString(asmdef.Name);
this.FullAssemblyName = metadata.GetFullAssemblyName();
}
else
{
var moddef = metadata.GetModuleDefinition();
this.AssemblyName = metadata.GetString(moddef.Name);
this.FullAssemblyName = this.AssemblyName;
}
this.rootNamespace = new MetadataNamespace(this, null, string.Empty, metadata.GetNamespaceDefinitionRoot());
if (!options.HasFlag(TypeSystemOptions.Uncached))
{
// create arrays for resolved entities, indexed by row index
this.typeDefs = new MetadataTypeDefinition[metadata.TypeDefinitions.Count + 1];
this.fieldDefs = new MetadataField[metadata.FieldDefinitions.Count + 1];
this.methodDefs = new MetadataMethod[metadata.MethodDefinitions.Count + 1];
this.propertyDefs = new MetadataProperty[metadata.PropertyDefinitions.Count + 1];
this.eventDefs = new MetadataEvent[metadata.EventDefinitions.Count + 1];
}
}
private ApplyAttributeTypeVisitor(ICompilation compilation, bool hasDynamicAttribute, bool[] dynamicAttributeData, TypeSystemOptions options, string[] tupleElementNames)
{
this.compilation = compilation ?? throw new ArgumentNullException(nameof(compilation));
this.hasDynamicAttribute = hasDynamicAttribute;
this.dynamicAttributeData = dynamicAttributeData;
this.options = options;
this.tupleElementNames = tupleElementNames;
}
internal MetadataModule(ICompilation compilation, Metadata.PEFile peFile, TypeSystemOptions options)
{
this.Compilation = compilation;
this.PEFile = peFile;
this.metadata = peFile.Metadata;
this.options = options;
this.TypeProvider = new TypeProvider(this);
// assembly metadata
if (metadata.IsAssembly)
{
var asmdef = metadata.GetAssemblyDefinition();
try
{
this.AssemblyName = metadata.GetString(asmdef.Name);
this.AssemblyVersion = asmdef.Version;
this.FullAssemblyName = metadata.GetFullAssemblyName();
}
catch (BadImageFormatException)
{
this.AssemblyName = "<ERR: invalid assembly name>";
this.FullAssemblyName = "<ERR: invalid assembly name>";
}
}
else
{
try
{
var moddef = metadata.GetModuleDefinition();
this.AssemblyName = metadata.GetString(moddef.Name);
}
catch (BadImageFormatException)
{
this.AssemblyName = "<ERR: invalid assembly name>";
}
this.FullAssemblyName = this.AssemblyName;
}
var customAttrs = metadata.GetModuleDefinition().GetCustomAttributes();
this.NullableContext = customAttrs.GetNullableContext(metadata) ?? Nullability.Oblivious;
this.minAccessibilityForNRT = FindMinimumAccessibilityForNRT(metadata, customAttrs);
this.rootNamespace = new MetadataNamespace(this, null, string.Empty, metadata.GetNamespaceDefinitionRoot());
if (!options.HasFlag(TypeSystemOptions.Uncached))
{
// create arrays for resolved entities, indexed by row index
this.typeDefs = new MetadataTypeDefinition[metadata.TypeDefinitions.Count + 1];
this.fieldDefs = new MetadataField[metadata.FieldDefinitions.Count + 1];
this.methodDefs = new MetadataMethod[metadata.MethodDefinitions.Count + 1];
this.propertyDefs = new MetadataProperty[metadata.PropertyDefinitions.Count + 1];
this.eventDefs = new MetadataEvent[metadata.EventDefinitions.Count + 1];
this.referencedAssemblies = new IModule[metadata.AssemblyReferences.Count + 1];
}
}
public ICompilation GetTypeSystemOrNull(TypeSystemOptions options)
{
if (typeSystemWithOptions != null && options == currentTypeSystemOptions)
{
return(typeSystemWithOptions);
}
var module = GetPEFileOrNull();
if (module == null)
{
return(null);
}
currentTypeSystemOptions = options;
return(typeSystemWithOptions = new SimpleCompilation(
module.WithOptions(options | TypeSystemOptions.Uncached | TypeSystemOptions.KeepModifiers),
MinimalCorlib.Instance));
}
public IType ResolveType(EntityHandle typeRefDefSpec, GenericContext context, TypeSystemOptions customOptions, CustomAttributeHandleCollection?typeAttributes = null, Nullability nullableContext = Nullability.Oblivious)
{
if (typeRefDefSpec.IsNil)
{
return(SpecialType.UnknownType);
}
IType ty;
switch (typeRefDefSpec.Kind)
{
case HandleKind.TypeDefinition:
ty = TypeProvider.GetTypeFromDefinition(metadata, (TypeDefinitionHandle)typeRefDefSpec, 0);
break;
case HandleKind.TypeReference:
ty = TypeProvider.GetTypeFromReference(metadata, (TypeReferenceHandle)typeRefDefSpec, 0);
break;
case HandleKind.TypeSpecification:
var typeSpec = metadata.GetTypeSpecification((TypeSpecificationHandle)typeRefDefSpec);
ty = typeSpec.DecodeSignature(TypeProvider, context);
break;
case HandleKind.ExportedType:
return(ResolveForwardedType(metadata.GetExportedType((ExportedTypeHandle)typeRefDefSpec)));
default:
throw new BadImageFormatException("Not a type handle");
}
ty = ApplyAttributeTypeVisitor.ApplyAttributesToType(ty, Compilation, typeAttributes, metadata, customOptions, nullableContext);
return(ty);
}
public static async Task <DecompilerTypeSystem> CreateAsync(PEFile mainModule, IAssemblyResolver assemblyResolver, TypeSystemOptions typeSystemOptions)
{
if (mainModule == null)
{
throw new ArgumentNullException(nameof(mainModule));
}
if (assemblyResolver == null)
{
throw new ArgumentNullException(nameof(assemblyResolver));
}
var ts = new DecompilerTypeSystem();
await ts.InitializeAsync(mainModule, assemblyResolver, typeSystemOptions)
.ConfigureAwait(false);
return(ts);
}
public static IType ApplyAttributesToType(
IType inputType,
ICompilation compilation,
SRM.CustomAttributeHandleCollection?attributes,
SRM.MetadataReader metadata,
TypeSystemOptions options,
bool typeChildrenOnly = false)
{
bool useDynamicType = (options & TypeSystemOptions.Dynamic) != 0;
bool useTupleTypes = (options & TypeSystemOptions.Tuple) != 0;
bool hasDynamicAttribute = false;
bool[] dynamicAttributeData = null;
string[] tupleElementNames = null;
if (attributes != null && (useDynamicType || useTupleTypes))
{
foreach (var attrHandle in attributes.Value)
{
var attr = metadata.GetCustomAttribute(attrHandle);
var attrType = attr.GetAttributeType(metadata);
if (useDynamicType && attrType.IsKnownType(metadata, KnownAttribute.Dynamic))
{
hasDynamicAttribute = true;
var ctor = attr.DecodeValue(Metadata.MetadataExtensions.minimalCorlibTypeProvider);
if (ctor.FixedArguments.Length == 1)
{
var arg = ctor.FixedArguments[0];
if (arg.Value is ImmutableArray <SRM.CustomAttributeTypedArgument <IType> > values &&
values.All(v => v.Value is bool))
{
dynamicAttributeData = values.SelectArray(v => (bool)v.Value);
}
}
}
else if (useTupleTypes && attrType.IsKnownType(metadata, KnownAttribute.TupleElementNames))
{
var ctor = attr.DecodeValue(Metadata.MetadataExtensions.minimalCorlibTypeProvider);
if (ctor.FixedArguments.Length == 1)
{
var arg = ctor.FixedArguments[0];
if (arg.Value is ImmutableArray <SRM.CustomAttributeTypedArgument <IType> > values &&
values.All(v => v.Value is string || v.Value == null))
{
tupleElementNames = values.SelectArray(v => (string)v.Value);
}
}
}
}
}
if (hasDynamicAttribute || (options & (TypeSystemOptions.Tuple | TypeSystemOptions.KeepModifiers)) != TypeSystemOptions.KeepModifiers)
{
var visitor = new ApplyAttributeTypeVisitor(
compilation, hasDynamicAttribute, dynamicAttributeData, options, tupleElementNames
);
if (typeChildrenOnly)
{
return(inputType.VisitChildren(visitor));
}
else
{
return(inputType.AcceptVisitor(visitor));
}
}
else
{
return(inputType);
}
}
public static IType ApplyAttributesToType(
IType inputType,
ICompilation compilation,
SRM.CustomAttributeHandleCollection?attributes,
SRM.MetadataReader metadata,
TypeSystemOptions options,
Nullability nullableContext,
bool typeChildrenOnly = false)
{
bool hasDynamicAttribute = false;
bool[] dynamicAttributeData = null;
bool hasNativeIntegersAttribute = false;
bool[] nativeIntegersAttributeData = null;
string[] tupleElementNames = null;
Nullability nullability;
Nullability[] nullableAttributeData = null;
if ((options & TypeSystemOptions.NullabilityAnnotations) != 0)
{
nullability = nullableContext;
}
else
{
nullability = Nullability.Oblivious;
}
const TypeSystemOptions relevantOptions = TypeSystemOptions.Dynamic | TypeSystemOptions.Tuple | TypeSystemOptions.NullabilityAnnotations | TypeSystemOptions.NativeIntegers;
if (attributes != null && (options & relevantOptions) != 0)
{
foreach (var attrHandle in attributes.Value)
{
var attr = metadata.GetCustomAttribute(attrHandle);
var attrType = attr.GetAttributeType(metadata);
if ((options & TypeSystemOptions.Dynamic) != 0 && attrType.IsKnownType(metadata, KnownAttribute.Dynamic))
{
hasDynamicAttribute = true;
var ctor = attr.DecodeValue(Metadata.MetadataExtensions.minimalCorlibTypeProvider);
if (ctor.FixedArguments.Length == 1)
{
var arg = ctor.FixedArguments[0];
if (arg.Value is ImmutableArray <SRM.CustomAttributeTypedArgument <IType> > values &&
values.All(v => v.Value is bool))
{
dynamicAttributeData = values.SelectArray(v => (bool)v.Value);
}
}
}
else if ((options & TypeSystemOptions.NativeIntegers) != 0 && attrType.IsKnownType(metadata, KnownAttribute.NativeInteger))
{
hasNativeIntegersAttribute = true;
var ctor = attr.DecodeValue(Metadata.MetadataExtensions.minimalCorlibTypeProvider);
if (ctor.FixedArguments.Length == 1)
{
var arg = ctor.FixedArguments[0];
if (arg.Value is ImmutableArray <SRM.CustomAttributeTypedArgument <IType> > values &&
values.All(v => v.Value is bool))
{
nativeIntegersAttributeData = values.SelectArray(v => (bool)v.Value);
}
}
}
else if ((options & TypeSystemOptions.Tuple) != 0 && attrType.IsKnownType(metadata, KnownAttribute.TupleElementNames))
{
var ctor = attr.DecodeValue(Metadata.MetadataExtensions.minimalCorlibTypeProvider);
if (ctor.FixedArguments.Length == 1)
{
var arg = ctor.FixedArguments[0];
if (arg.Value is ImmutableArray <SRM.CustomAttributeTypedArgument <IType> > values &&
values.All(v => v.Value is string || v.Value == null))
{
tupleElementNames = values.SelectArray(v => (string)v.Value);
}
}
}
else if ((options & TypeSystemOptions.NullabilityAnnotations) != 0 && attrType.IsKnownType(metadata, KnownAttribute.Nullable))
{
var ctor = attr.DecodeValue(Metadata.MetadataExtensions.minimalCorlibTypeProvider);
if (ctor.FixedArguments.Length == 1)
{
var arg = ctor.FixedArguments[0];
if (arg.Value is ImmutableArray <SRM.CustomAttributeTypedArgument <IType> > values &&
values.All(v => v.Value is byte b && b <= 2))
{
nullableAttributeData = values.SelectArray(v => (Nullability)(byte)v.Value);
}
else if (arg.Value is byte b && b <= 2)
{
nullability = (Nullability)b;
}
}
}
}
}
internal static (IType returnType, IParameter[] parameters, ModifiedType returnTypeModifier) DecodeSignature(
MetadataModule module, IParameterizedMember owner,
MethodSignature <IType> signature, ParameterHandleCollection?parameterHandles,
Nullability nullableContext, TypeSystemOptions typeSystemOptions,
CustomAttributeHandleCollection?returnTypeAttributes = null)
{
var metadata = module.metadata;
int i = 0;
IParameter[] parameters = new IParameter[signature.RequiredParameterCount
+ (signature.Header.CallingConvention == SignatureCallingConvention.VarArgs ? 1 : 0)];
IType parameterType;
if (parameterHandles != null)
{
foreach (var parameterHandle in parameterHandles)
{
var par = metadata.GetParameter(parameterHandle);
if (par.SequenceNumber == 0)
{
// "parameter" holds return type attributes.
// Note: for properties, the attributes normally stored on a method's return type
// are instead stored as normal attributes on the property.
// So MetadataProperty provides a non-null value for returnTypeAttributes,
// which then should be preferred over the attributes on the accessor's parameters.
if (returnTypeAttributes == null)
{
returnTypeAttributes = par.GetCustomAttributes();
}
}
else if (par.SequenceNumber > 0 && i < signature.RequiredParameterCount)
{
// "Successive rows of the Param table that are owned by the same method shall be
// ordered by increasing Sequence value - although gaps in the sequence are allowed"
Debug.Assert(i < par.SequenceNumber);
// Fill gaps in the sequence with non-metadata parameters:
while (i < par.SequenceNumber - 1)
{
parameterType = ApplyAttributeTypeVisitor.ApplyAttributesToType(
signature.ParameterTypes[i], module.Compilation, null, metadata, typeSystemOptions, nullableContext);
parameters[i] = new DefaultParameter(parameterType, name: string.Empty, owner,
referenceKind: parameterType.Kind == TypeKind.ByReference ? ReferenceKind.Ref : ReferenceKind.None);
i++;
}
parameterType = ApplyAttributeTypeVisitor.ApplyAttributesToType(
signature.ParameterTypes[i], module.Compilation,
par.GetCustomAttributes(), metadata, typeSystemOptions, nullableContext);
parameters[i] = new MetadataParameter(module, owner, parameterType, parameterHandle);
i++;
}
}
}
while (i < signature.RequiredParameterCount)
{
parameterType = ApplyAttributeTypeVisitor.ApplyAttributesToType(
signature.ParameterTypes[i], module.Compilation, null, metadata, typeSystemOptions, nullableContext);
parameters[i] = new DefaultParameter(parameterType, name: string.Empty, owner,
referenceKind: parameterType.Kind == TypeKind.ByReference ? ReferenceKind.Ref : ReferenceKind.None);
i++;
}
if (signature.Header.CallingConvention == SignatureCallingConvention.VarArgs)
{
parameters[i] = new DefaultParameter(SpecialType.ArgList, name: string.Empty, owner);
i++;
}
Debug.Assert(i == parameters.Length);
var returnType = ApplyAttributeTypeVisitor.ApplyAttributesToType(signature.ReturnType,
module.Compilation, returnTypeAttributes, metadata, typeSystemOptions, nullableContext);
return(returnType, parameters, signature.ReturnType as ModifiedType);
}