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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 Internal.Text;
using Internal.TypeSystem;
using System.Collections.Generic;
using Debug = System.Diagnostics.Debug;
namespace ILCompiler.DependencyAnalysis
{
/// <summary>
/// Represents the offset of the thread static region of a given type from the TLS section start.
/// The node is used for cross-module thread statics reference
/// </summary>
public class ThreadStaticsOffsetNode : EmbeddedObjectNode, IExportableSymbolNode, ISortableSymbolNode
{
private MetadataType _type;
public ThreadStaticsOffsetNode(MetadataType type, NodeFactory factory)
{
_type = type;
}
protected override string GetName(NodeFactory factory) => this.GetMangledName(factory.NameMangler);
public void AppendMangledName(NameMangler nameMangler, Utf8StringBuilder sb)
{
sb.Append(GetMangledName(nameMangler, _type));
}
public static string GetMangledName(NameMangler nameMangler, TypeDesc type)
{
return "__ThreadStaticBaseOffset_" + nameMangler.GetMangledTypeName(type);
}
protected override void OnMarked(NodeFactory factory)
{
(factory as UtcNodeFactory).ThreadStaticsOffsetRegion.AddEmbeddedObject(this);
}
public override IEnumerable<DependencyListEntry> GetStaticDependencies(NodeFactory factory)
{
UtcNodeFactory hostedFactory = factory as UtcNodeFactory;
Debug.Assert(hostedFactory != null);
DependencyListEntry[] result = new DependencyListEntry[2];
result[0] = new DependencyListEntry(hostedFactory.ThreadStaticsOffsetRegion, "ThreadStatics Offset Region");
result[1] = new DependencyListEntry(factory.TypeThreadStaticsSymbol(_type), "ThreadStatics Base");
return result;
}
public ExportForm GetExportForm(NodeFactory factory)
{
return factory.CompilationModuleGroup.GetExportTypeForm(Type);
}
public MetadataType Type => _type;
int ISymbolNode.Offset => 0;
int ISymbolDefinitionNode.Offset => OffsetFromBeginningOfArray;
public override bool StaticDependenciesAreComputed
{
get
{
return true;
}
}
public override void EncodeData(ref ObjectDataBuilder builder, NodeFactory factory, bool relocsOnly)
{
builder.EmitReloc(factory.TypeThreadStaticsSymbol(_type), RelocType.IMAGE_REL_SECREL);
}
public sealed override int ClassCode => 419394032;
public override int CompareToImpl(ISortableNode other, CompilerComparer comparer)
{
return comparer.Compare(_type, ((ThreadStaticsOffsetNode)other)._type);
}
}
}
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