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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.Collections.Generic;
using System.Diagnostics;
using Internal.Text;
using Internal.TypeSystem;
namespace ILCompiler.DependencyAnalysis
{
/// <summary>
/// Represents the thread static region of a given type. This is very similar to <see cref="GCStaticsNode"/>,
/// since the actual storage will be allocated on the GC heap at runtime and is allowed to contain GC pointers.
/// </summary>
public class ThreadStaticsNode : EmbeddedObjectNode, ISymbolDefinitionNode
{
private MetadataType _type;
public ThreadStaticsNode(MetadataType type, NodeFactory factory)
{
Debug.Assert(factory.Target.Abi == TargetAbi.CoreRT || factory.Target.Abi == TargetAbi.CppCodegen);
_type = type;
}
protected override string GetName(NodeFactory factory) => this.GetMangledName(factory.NameMangler);
protected override void OnMarked(NodeFactory factory)
{
factory.ThreadStaticsRegion.AddEmbeddedObject(this);
}
public static string GetMangledName(TypeDesc type, NameMangler nameMangler)
{
return nameMangler.NodeMangler.ThreadStatics(type);
}
int ISymbolNode.Offset => 0;
int ISymbolDefinitionNode.Offset => OffsetFromBeginningOfArray;
public void AppendMangledName(NameMangler nameMangler, Utf8StringBuilder sb)
{
sb.Append(GetMangledName(_type, nameMangler));
}
private ISymbolNode GetGCStaticEETypeNode(NodeFactory factory)
{
GCPointerMap map = GCPointerMap.FromThreadStaticLayout(_type);
return factory.GCStaticEEType(map);
}
public override IEnumerable<DependencyListEntry> GetStaticDependencies(NodeFactory factory)
{
DependencyList result = new DependencyList();
result.Add(new DependencyListEntry(GetGCStaticEETypeNode(factory), "ThreadStatic EEType"));
if (factory.TypeSystemContext.HasEagerStaticConstructor(_type))
{
result.Add(new DependencyListEntry(factory.EagerCctorIndirection(_type.GetStaticConstructor()), "Eager .cctor"));
}
EETypeNode.AddDependenciesForStaticsNode(factory, _type, ref result);
return result;
}
public override bool StaticDependenciesAreComputed => true;
public override void EncodeData(ref ObjectDataBuilder builder, NodeFactory factory, bool relocsOnly)
{
// At runtime, an instance of the GCStaticEEType will be created and a GCHandle to it
// will be written in this location.
builder.RequireInitialPointerAlignment();
builder.EmitPointerReloc(GetGCStaticEETypeNode(factory));
}
public override int ClassCode => 2091208431;
public override int CompareToImpl(ISortableNode other, CompilerComparer comparer)
{
return comparer.Compare(_type, ((ThreadStaticsNode)other)._type);
}
}
}
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