MetadataUpdater.cs

Go to the documentation of this file.

using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
 
namespace System.Reflection.Metadata;
 
public static class MetadataUpdater
{
    public static bool IsSupported { get; } = IsApplyUpdateSupported();
 
 
    [DllImport("QCall")]
    private unsafe static extern void ApplyUpdate(QCallAssembly assembly, byte* metadataDelta, int metadataDeltaLength, byte* ilDelta, int ilDeltaLength, byte* pdbDelta, int pdbDeltaLength);
 
    [DllImport("QCall")]
    private static extern bool IsApplyUpdateSupported();
 
    public unsafe static void ApplyUpdate(Assembly assembly, ReadOnlySpan<byte> metadataDelta, ReadOnlySpan<byte> ilDelta, ReadOnlySpan<byte> pdbDelta)
    {
        if (!(assembly is RuntimeAssembly runtimeAssembly))
        {
            if ((object)assembly == null)
            {
                throw new ArgumentNullException("assembly");
            }
            throw new ArgumentException(SR.Argument_MustBeRuntimeAssembly);
        }
        RuntimeAssembly assembly2 = runtimeAssembly;
        fixed (byte* metadataDelta2 = metadataDelta)
        {
            fixed (byte* ilDelta2 = ilDelta)
            {
                fixed (byte* pdbDelta2 = pdbDelta)
                {
                    ApplyUpdate(new QCallAssembly(ref assembly2), metadataDelta2, metadataDelta.Length, ilDelta2, ilDelta.Length, pdbDelta2, pdbDelta.Length);
                }
            }
        }
    }
 
    internal static string GetCapabilities()
    {
        return "Baseline AddMethodToExistingType AddStaticFieldToExistingType AddInstanceFieldToExistingType NewTypeDefinition ChangeCustomAttributes UpdateParameters";
    }
}