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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.Collections.Generic;
using ILCompiler.DependencyAnalysisFramework;
using Internal.TypeSystem;
namespace ILCompiler.DependencyAnalysis
{
public abstract partial class ObjectNode : SortableDependencyNode
{
public class ObjectData
{
public ObjectData(byte[] data, Relocation[] relocs, int alignment, ISymbolDefinitionNode[] definedSymbols)
{
Data = data;
Relocs = relocs;
Alignment = alignment;
DefinedSymbols = definedSymbols;
}
public readonly Relocation[] Relocs;
public readonly byte[] Data;
public readonly int Alignment;
public readonly ISymbolDefinitionNode[] DefinedSymbols;
}
public virtual bool RepresentsIndirectionCell => false;
public abstract ObjectData GetData(NodeFactory factory, bool relocsOnly = false);
public abstract ObjectNodeSection Section { get; }
/// <summary>
/// Should identical symbols emitted into separate object files be Comdat folded when linked together?
/// </summary>
public abstract bool IsShareable { get; }
/// <summary>
/// Override this function to have a node which should be skipped when emitting
/// to the object file. (For instance, if there are two nodes describing the same
/// data structure, one of those nodes should return true here.)
/// </summary>
/// <param name="factory"></param>
/// <returns></returns>
public virtual bool ShouldSkipEmittingObjectNode(NodeFactory factory)
{
return false;
}
public override bool HasConditionalStaticDependencies => false;
public override bool HasDynamicDependencies => false;
public override bool InterestingForDynamicDependencyAnalysis => false;
public sealed override IEnumerable<DependencyListEntry> GetStaticDependencies(NodeFactory factory)
{
DependencyList dependencies = ComputeNonRelocationBasedDependencies(factory);
Relocation[] relocs = GetData(factory, true).Relocs;
if (relocs != null)
{
if (dependencies == null)
dependencies = new DependencyList();
foreach (Relocation reloc in relocs)
{
dependencies.Add(reloc.Target, "reloc");
}
}
if (dependencies == null)
return Array.Empty<DependencyListEntry>();
else
return dependencies;
}
protected virtual DependencyList ComputeNonRelocationBasedDependencies(NodeFactory factory)
{
return null;
}
public override IEnumerable<CombinedDependencyListEntry> GetConditionalStaticDependencies(NodeFactory factory) => null;
public override IEnumerable<CombinedDependencyListEntry> SearchDynamicDependencies(List<DependencyNodeCore<NodeFactory>> markedNodes, int firstNode, NodeFactory factory) => null;
}
}
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