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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.
using System;
using System.Diagnostics;
using Internal.Text;
using Internal.TypeSystem;
using Internal.NativeFormat;
namespace ILCompiler.DependencyAnalysis
{
/// <summary>
/// Represents a hashtable of all compiled generic method instantiations
/// </summary>
internal sealed class GenericMethodsHashtableNode : ObjectNode, ISymbolDefinitionNode
{
private ObjectAndOffsetSymbolNode _endSymbol;
private ExternalReferencesTableNode _externalReferences;
public GenericMethodsHashtableNode(ExternalReferencesTableNode externalReferences)
{
_endSymbol = new ObjectAndOffsetSymbolNode(this, 0, "__generic_methods_hashtable_End", true);
_externalReferences = externalReferences;
}
public void AppendMangledName(NameMangler nameMangler, Utf8StringBuilder sb)
{
sb.Append(nameMangler.CompilationUnitPrefix).Append("__generic_methods_hashtable");
}
public ISymbolNode EndSymbol => _endSymbol;
public int Offset => 0;
public override bool IsShareable => false;
public override ObjectNodeSection Section => _externalReferences.Section;
public override bool StaticDependenciesAreComputed => true;
protected override string GetName(NodeFactory factory) => this.GetMangledName(factory.NameMangler);
public override ObjectData GetData(NodeFactory factory, bool relocsOnly = false)
{
// This node does not trigger generation of other nodes.
if (relocsOnly)
return new ObjectData(Array.Empty<byte>(), Array.Empty<Relocation>(), 1, new ISymbolDefinitionNode[] { this });
// Ensure the native layout data has been saved, in order to get valid Vertex offsets for the signature Vertices
factory.MetadataManager.NativeLayoutInfo.SaveNativeLayoutInfoWriter(factory);
NativeWriter nativeWriter = new NativeWriter();
VertexHashtable hashtable = new VertexHashtable();
Section nativeSection = nativeWriter.NewSection();
nativeSection.Place(hashtable);
foreach (var dictionaryNode in factory.MetadataManager.GetCompiledGenericDictionaries())
{
MethodGenericDictionaryNode methodDictionary = dictionaryNode as MethodGenericDictionaryNode;
if (methodDictionary == null)
continue;
MethodDesc method = methodDictionary.OwningMethod;
Debug.Assert(method.HasInstantiation && !method.IsCanonicalMethod(CanonicalFormKind.Any));
Vertex fullMethodSignature;
{
// Method's containing type
IEETypeNode containingTypeNode = factory.NecessaryTypeSymbol(method.OwningType);
Vertex containingType = nativeWriter.GetUnsignedConstant(_externalReferences.GetIndex(containingTypeNode));
// Method's instantiation arguments
VertexSequence arguments = new VertexSequence();
for (int i = 0; i < method.Instantiation.Length; i++)
{
IEETypeNode argNode = factory.NecessaryTypeSymbol(method.Instantiation[i]);
arguments.Append(nativeWriter.GetUnsignedConstant(_externalReferences.GetIndex(argNode)));
}
// Method name and signature
NativeLayoutVertexNode nameAndSig = factory.NativeLayout.MethodNameAndSignatureVertex(method.GetTypicalMethodDefinition());
NativeLayoutSavedVertexNode placedNameAndSig = factory.NativeLayout.PlacedSignatureVertex(nameAndSig);
Vertex placedNameAndSigVertexOffset = nativeWriter.GetUnsignedConstant((uint)placedNameAndSig.SavedVertex.VertexOffset);
fullMethodSignature = nativeWriter.GetTuple(containingType, placedNameAndSigVertexOffset, arguments);
}
// Method's dictionary pointer
Vertex dictionaryVertex = nativeWriter.GetUnsignedConstant(_externalReferences.GetIndex(dictionaryNode));
Vertex entry = nativeWriter.GetTuple(dictionaryVertex, fullMethodSignature);
hashtable.Append((uint)method.GetHashCode(), nativeSection.Place(entry));
}
byte[] streamBytes = nativeWriter.Save();
_endSymbol.SetSymbolOffset(streamBytes.Length);
return new ObjectData(streamBytes, Array.Empty<Relocation>(), 1, new ISymbolDefinitionNode[] { this, _endSymbol });
}
public static void GetGenericMethodsHashtableDependenciesForMethod(ref DependencyList dependencies, NodeFactory factory, MethodDesc method)
{
if (!factory.MetadataManager.SupportsReflection)
return;
Debug.Assert(method.HasInstantiation && !method.IsCanonicalMethod(CanonicalFormKind.Any));
// Method's containing type
IEETypeNode containingTypeNode = factory.NecessaryTypeSymbol(method.OwningType);
dependencies.Add(new DependencyListEntry(containingTypeNode, "GenericMethodsHashtable entry containing type"));
// Method's instantiation arguments
for (int i = 0; i < method.Instantiation.Length; i++)
{
IEETypeNode argNode = factory.NecessaryTypeSymbol(method.Instantiation[i]);
dependencies.Add(new DependencyListEntry(argNode, "GenericMethodsHashtable entry instantiation argument"));
}
// Method name and signature
NativeLayoutVertexNode nameAndSig = factory.NativeLayout.MethodNameAndSignatureVertex(method.GetTypicalMethodDefinition());
NativeLayoutSavedVertexNode placedNameAndSig = factory.NativeLayout.PlacedSignatureVertex(nameAndSig);
dependencies.Add(new DependencyListEntry(placedNameAndSig, "GenericMethodsHashtable entry signature"));
ISymbolNode dictionaryNode = factory.MethodGenericDictionary(method);
dependencies.Add(new DependencyListEntry(dictionaryNode, "GenericMethodsHashtable entry dictionary"));
}
protected internal override int Phase => (int)ObjectNodePhase.Ordered;
public override int ClassCode => (int)ObjectNodeOrder.GenericMethodsHashtableNode;
}
}
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