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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 Internal.Text;
using Internal.TypeSystem;
using Internal.NativeFormat;
namespace ILCompiler.DependencyAnalysis
{
/// <summary>
/// Represents a hashtable of all compiled generic type instantiations
/// </summary>
internal sealed class GenericTypesHashtableNode : ObjectNode, ISymbolDefinitionNode
{
private ObjectAndOffsetSymbolNode _endSymbol;
private ExternalReferencesTableNode _externalReferences;
public GenericTypesHashtableNode(ExternalReferencesTableNode externalReferences)
{
_endSymbol = new ObjectAndOffsetSymbolNode(this, 0, "__generic_types_hashtable_End", true);
_externalReferences = externalReferences;
}
public void AppendMangledName(NameMangler nameMangler, Utf8StringBuilder sb)
{
sb.Append(nameMangler.CompilationUnitPrefix).Append("__generic_types_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 });
NativeWriter nativeWriter = new NativeWriter();
VertexHashtable hashtable = new VertexHashtable();
Section nativeSection = nativeWriter.NewSection();
nativeSection.Place(hashtable);
foreach (var type in factory.MetadataManager.GetTypesWithEETypes())
{
// If this is an instantiated non-canonical generic type, add it to the generic instantiations hashtable
if (!type.HasInstantiation || type.IsGenericDefinition || type.IsCanonicalSubtype(CanonicalFormKind.Any))
continue;
var typeSymbol = factory.NecessaryTypeSymbol(type);
uint instantiationId = _externalReferences.GetIndex(typeSymbol);
Vertex hashtableEntry = nativeWriter.GetUnsignedConstant(instantiationId);
hashtable.Append((uint)type.GetHashCode(), nativeSection.Place(hashtableEntry));
}
byte[] streamBytes = nativeWriter.Save();
_endSymbol.SetSymbolOffset(streamBytes.Length);
return new ObjectData(streamBytes, Array.Empty<Relocation>(), 1, new ISymbolDefinitionNode[] { this, _endSymbol });
}
protected internal override int Phase => (int)ObjectNodePhase.Ordered;
public override int ClassCode => (int)ObjectNodeOrder.GenericTypesHashtableNode;
}
}
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