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' Licensed to the .NET Foundation under one or more agreements.
' The .NET Foundation licenses this file to you under the MIT license.
' See the LICENSE file in the project root for more information.
Imports System.Collections.Immutable
Imports System.Reflection.Metadata
Imports System.Reflection.Metadata.Ecma335
Imports Microsoft.CodeAnalysis.ExpressionEvaluator
Imports Microsoft.CodeAnalysis.VisualBasic.Symbols
Imports Microsoft.CodeAnalysis.VisualBasic.Symbols.Metadata.PE
Imports Microsoft.VisualStudio.Debugger.Clr
Imports System.Text
Namespace Microsoft.CodeAnalysis.VisualBasic.ExpressionEvaluator
Friend NotInheritable Class VisualBasicInstructionDecoder : Inherits InstructionDecoder(Of VisualBasicCompilation, MethodSymbol, PEModuleSymbol, TypeSymbol, TypeParameterSymbol)
' These strings were not localized in the old EE. We'll keep them that way
' so as not to break consumers who may have been parsing frame names...
Private Const s_closureDisplayName As String = "<closure>"
Private Const s_lambdaDisplayName As String = "<lambda{0}>"
''' <summary>
''' Singleton instance of <see cref="VisualBasicInstructionDecoder"/> (created using default constructor).
''' </summary>
Friend Shared ReadOnly Instance As VisualBasicInstructionDecoder = New VisualBasicInstructionDecoder()
Private Sub New()
End Sub
Friend Overrides Function GetCompactName(method As MethodSymbol) As String
Dim symbol = If(method.AssociatedSymbol, method)
Return symbol.ToDisplayString(CompactNameFormat)
End Function
Friend Overrides Sub AppendFullName(builder As StringBuilder, method As MethodSymbol)
Dim parts = method.ToDisplayParts(DisplayFormat)
Dim numParts = parts.Length
For i = 0 To numParts - 1
Dim part = parts(i)
Dim displayString = part.ToString()
Select Case part.Kind
Case SymbolDisplayPartKind.ClassName
If Not displayString.StartsWith(GeneratedNameConstants.DisplayClassPrefix, StringComparison.Ordinal) Then
builder.Append(displayString)
Else
' Drop any remaining display class name parts and the subsequent dot...
Do
i += 1
Loop While ((i < numParts) AndAlso parts(i).Kind <> SymbolDisplayPartKind.MethodName)
i -= 1
End If
Case SymbolDisplayPartKind.MethodName
If displayString.StartsWith(GeneratedNameConstants.LambdaMethodNamePrefix, StringComparison.Ordinal) Then
builder.Append(s_closureDisplayName)
builder.Append("."c)
' NOTE: The old implementation only appended the first ordinal number. Since this is not useful
' in uniquely identifying the lambda, we'll append the entire ordinal suffix (which may contain
' multiple numbers, as well as '-' or '_').
builder.AppendFormat(s_lambdaDisplayName, displayString.Substring(GeneratedNameConstants.LambdaMethodNamePrefix.Length))
Else
builder.Append(displayString)
End If
Case SymbolDisplayPartKind.PropertyName
builder.Append(method.Name)
Case Else
builder.Append(displayString)
End Select
Next
End Sub
Friend Overrides Function ConstructMethod(method As MethodSymbol, typeParameters As ImmutableArray(Of TypeParameterSymbol), typeArguments As ImmutableArray(Of TypeSymbol)) As MethodSymbol
Dim methodArity = method.Arity
Dim methodArgumentStartIndex = typeParameters.Length - methodArity
Dim typeMap = TypeSubstitution.Create(
method,
ImmutableArray.Create(typeParameters, 0, methodArgumentStartIndex),
ImmutableArray.Create(typeArguments, 0, methodArgumentStartIndex))
Dim substitutedType = typeMap.SubstituteNamedType(method.ContainingType)
method = method.AsMember(substitutedType)
If methodArity > 0 Then
method = method.Construct(ImmutableArray.Create(typeArguments, methodArgumentStartIndex, methodArity))
End If
Return method
End Function
Friend Overrides Function GetAllTypeParameters(method As MethodSymbol) As ImmutableArray(Of TypeParameterSymbol)
Return method.GetAllTypeParameters()
End Function
Friend Overrides Function GetCompilation(moduleInstance As DkmClrModuleInstance) As VisualBasicCompilation
Dim appDomain = moduleInstance.AppDomain
Dim moduleVersionId = moduleInstance.Mvid
Dim previous = appDomain.GetMetadataContext(Of VisualBasicMetadataContext)()
Dim metadataBlocks = moduleInstance.RuntimeInstance.GetMetadataBlocks(appDomain, previous.MetadataBlocks)
Dim kind = GetMakeAssemblyReferencesKind()
Dim contextId = MetadataContextId.GetContextId(moduleVersionId, kind)
Dim assemblyContexts = If(previous.Matches(metadataBlocks), previous.AssemblyContexts, ImmutableDictionary(Of MetadataContextId, VisualBasicMetadataContext).Empty)
Dim previousContext As VisualBasicMetadataContext = Nothing
assemblyContexts.TryGetValue(contextId, previousContext)
Dim compilation = previousContext.Compilation
If compilation Is Nothing Then
compilation = metadataBlocks.ToCompilation(moduleVersionId, kind)
appDomain.SetMetadataContext(
New MetadataContext(Of VisualBasicMetadataContext)(
metadataBlocks,
assemblyContexts.SetItem(contextId, New VisualBasicMetadataContext(compilation))),
report:=kind = MakeAssemblyReferencesKind.AllReferences)
End If
Return compilation
End Function
Friend Overrides Function GetMethod(compilation As VisualBasicCompilation, instructionAddress As DkmClrInstructionAddress) As MethodSymbol
Dim methodHandle = CType(MetadataTokens.Handle(instructionAddress.MethodId.Token), MethodDefinitionHandle)
Return compilation.GetSourceMethod(instructionAddress.ModuleInstance.Mvid, methodHandle)
End Function
Friend Overrides Function GetTypeNameDecoder(compilation As VisualBasicCompilation, method As MethodSymbol) As TypeNameDecoder(Of PEModuleSymbol, TypeSymbol)
Debug.Assert(TypeOf method Is PEMethodSymbol)
Return New EETypeNameDecoder(compilation, DirectCast(method.ContainingModule, PEModuleSymbol))
End Function
End Class
End Namespace
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