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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 System.Runtime.InteropServices;
using System.IO;
using System.Text;
using Internal.Text;
namespace ILCompiler.DependencyAnalysis
{
internal class WindowsDebugILImagesSection : ObjectNode, ISymbolDefinitionNode
{
private MergedAssemblyRecords _mergedAssemblies;
public WindowsDebugILImagesSection(MergedAssemblyRecords mergedAssemblies)
{
_mergedAssemblies = mergedAssemblies;
}
private ObjectNodeSection _section = new ObjectNodeSection(".ilimges", SectionType.ReadOnly);
public override ObjectNodeSection Section => _section;
public override bool IsShareable => false;
public override bool StaticDependenciesAreComputed => true;
public int Offset => 0;
public override int ClassCode => 2051656903;
public void AppendMangledName(NameMangler nameMangler, Utf8StringBuilder sb)
{
sb.Append(GetName(null));
}
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 });
MemoryStream memoryStream = new MemoryStream();
BinaryWriter writer = new BinaryWriter(memoryStream, Encoding.Unicode, true);
writer.Write(1); // magic format version number
writer.Write(_mergedAssemblies.MergedAssemblies.Count); // number of il images that will follow
int totalSizeOfActualMergedAssemblies = 0;
checked
{
const int ILIMAGES_HEADER_ELEMENTS = 2;
const int ILIMAGES_PERMODULE_ELEMENTS = 3;
int endOfILAssemblyListHeader = ((_mergedAssemblies.MergedAssemblies.Count * ILIMAGES_PERMODULE_ELEMENTS) + ILIMAGES_HEADER_ELEMENTS) * sizeof(int);
int offsetOfNextAssembly = endOfILAssemblyListHeader;
foreach (MergedAssemblyRecord mergedAssembly in _mergedAssemblies.MergedAssemblies)
{
int assemblyFileLen = mergedAssembly.Assembly.PEReader.GetEntireImage().Length;
writer.Write(mergedAssembly.AssemblyIndex);
writer.Write(offsetOfNextAssembly);
writer.Write(assemblyFileLen);
offsetOfNextAssembly += assemblyFileLen;
totalSizeOfActualMergedAssemblies += assemblyFileLen;
}
writer.Flush();
writer.Dispose();
byte[] mergedAssemblyHeader = memoryStream.ToArray();
Debug.Assert(mergedAssemblyHeader.Length == endOfILAssemblyListHeader);
byte[] mergedAssemblyBlob = new byte[mergedAssemblyHeader.Length + totalSizeOfActualMergedAssemblies];
Array.Copy(mergedAssemblyHeader, mergedAssemblyBlob, mergedAssemblyHeader.Length);
offsetOfNextAssembly = endOfILAssemblyListHeader;
foreach (MergedAssemblyRecord mergedAssembly in _mergedAssemblies.MergedAssemblies)
{
var memoryBlock = mergedAssembly.Assembly.PEReader.GetEntireImage();
int assemblyFileLen = memoryBlock.Length;
unsafe
{
Marshal.Copy(new IntPtr(memoryBlock.Pointer), mergedAssemblyBlob, offsetOfNextAssembly, assemblyFileLen);
}
offsetOfNextAssembly += assemblyFileLen;
}
return new ObjectData(mergedAssemblyBlob, Array.Empty<Relocation>(), 1, new ISymbolDefinitionNode[] { this });
}
}
protected override string GetName(NodeFactory context)
{
return "___DebugILImagesSection";
}
}
}
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