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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>
/// Hashtable of all generic method templates used by the TypeLoader at runtime
/// </summary>
internal sealed class GenericMethodsTemplateMap : ObjectNode, ISymbolDefinitionNode
{
private ObjectAndOffsetSymbolNode _endSymbol;
private ExternalReferencesTableNode _externalReferences;
public GenericMethodsTemplateMap(ExternalReferencesTableNode externalReferences)
{
_endSymbol = new ObjectAndOffsetSymbolNode(this, 0, "__GenericMethodsTemplateMap_End", true);
_externalReferences = externalReferences;
}
public void AppendMangledName(NameMangler nameMangler, Utf8StringBuilder sb)
{
sb.Append(nameMangler.CompilationUnitPrefix).Append("__GenericMethodsTemplateMap");
}
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)
{
// Dependencies for this node are tracked by the method code 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 (MethodDesc method in factory.MetadataManager.GetCompiledMethods())
{
if (!IsEligibleToBeATemplate(method))
continue;
// Method entry
Vertex methodEntry = factory.NativeLayout.TemplateMethodEntry(method).SavedVertex;
// Method's native layout info
Vertex nativeLayout = factory.NativeLayout.TemplateMethodLayout(method).SavedVertex;
// Hashtable Entry
Vertex entry = nativeWriter.GetTuple(
nativeWriter.GetUnsignedConstant((uint)methodEntry.VertexOffset),
nativeWriter.GetUnsignedConstant((uint)nativeLayout.VertexOffset));
// Add to the hash table, hashed by the containing type's hashcode
uint hashCode = (uint)method.GetHashCode();
hashtable.Append(hashCode, 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 GetTemplateMethodDependencies(ref DependencyList dependencies, NodeFactory factory, MethodDesc method)
{
if (!IsEligibleToBeATemplate(method))
return;
if (!factory.MetadataManager.SupportsReflection)
return;
dependencies = dependencies ?? new DependencyList();
dependencies.Add(new DependencyListEntry(factory.NativeLayout.TemplateMethodEntry(method), "Template Method Entry"));
dependencies.Add(new DependencyListEntry(factory.NativeLayout.TemplateMethodLayout(method), "Template Method Layout"));
}
private static bool IsEligibleToBeATemplate(MethodDesc method)
{
if (!method.HasInstantiation)
return false;
if (method.IsAbstract)
return false;
if (method.IsCanonicalMethod(CanonicalFormKind.Specific))
{
// Must be fully canonical
Debug.Assert(method == method.GetCanonMethodTarget(CanonicalFormKind.Specific));
return true;
}
else if (method.IsCanonicalMethod(CanonicalFormKind.Universal))
{
// Must be fully canonical
if (method == method.GetCanonMethodTarget(CanonicalFormKind.Universal))
return true;
}
return false;
}
protected internal override int Phase => (int)ObjectNodePhase.Ordered;
public override int ClassCode => (int)ObjectNodeOrder.GenericMethodsTemplateMap;
}
}
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