// dnlib: See LICENSE.txt for more info using System; using System.Collections.Generic; using System.Diagnostics; using System.Threading; using dnlib.DotNet.MD; using dnlib.DotNet.Pdb; namespace dnlib.DotNet { /// /// A high-level representation of a row in the StandAloneSig table /// public abstract class StandAloneSig : IHasCustomAttribute, IHasCustomDebugInformation, IContainsGenericParameter { /// /// The row id in its table /// protected uint rid; /// public MDToken MDToken => new MDToken(Table.StandAloneSig, rid); /// public uint Rid { get => rid; set => rid = value; } /// public int HasCustomAttributeTag => 11; /// /// From column StandAloneSig.Signature /// public CallingConventionSig Signature { get => signature; set => signature = value; } /// protected CallingConventionSig signature; /// /// Gets all custom attributes /// public CustomAttributeCollection CustomAttributes { get { if (customAttributes is null) InitializeCustomAttributes(); return customAttributes; } } /// protected CustomAttributeCollection customAttributes; /// Initializes protected virtual void InitializeCustomAttributes() => Interlocked.CompareExchange(ref customAttributes, new CustomAttributeCollection(), null); /// public bool HasCustomAttributes => CustomAttributes.Count > 0; /// public int HasCustomDebugInformationTag => 11; /// public bool HasCustomDebugInfos => CustomDebugInfos.Count > 0; /// /// Gets all custom debug infos /// public IList CustomDebugInfos { get { if (customDebugInfos is null) InitializeCustomDebugInfos(); return customDebugInfos; } } /// protected IList customDebugInfos; /// Initializes protected virtual void InitializeCustomDebugInfos() => Interlocked.CompareExchange(ref customDebugInfos, new List(), null); /// /// Gets/sets the method sig /// public MethodSig MethodSig { get => signature as MethodSig; set => signature = value; } /// /// Gets/sets the locals sig /// public LocalSig LocalSig { get => signature as LocalSig; set => signature = value; } /// public bool ContainsGenericParameter => TypeHelper.ContainsGenericParameter(this); } /// /// A StandAloneSig row created by the user and not present in the original .NET file /// public class StandAloneSigUser : StandAloneSig { /// /// Default constructor /// public StandAloneSigUser() { } /// /// Constructor /// /// A locals sig public StandAloneSigUser(LocalSig localSig) => signature = localSig; /// /// Constructor /// /// A method sig public StandAloneSigUser(MethodSig methodSig) => signature = methodSig; } /// /// Created from a row in the StandAloneSig table /// sealed class StandAloneSigMD : StandAloneSig, IMDTokenProviderMD, IContainsGenericParameter2 { /// The module where this instance is located readonly ModuleDefMD readerModule; readonly uint origRid; readonly GenericParamContext gpContext; /// public uint OrigRid => origRid; /// protected override void InitializeCustomAttributes() { var list = readerModule.Metadata.GetCustomAttributeRidList(Table.StandAloneSig, origRid); var tmp = new CustomAttributeCollection(list.Count, list, (list2, index) => readerModule.ReadCustomAttribute(list[index])); Interlocked.CompareExchange(ref customAttributes, tmp, null); } /// protected override void InitializeCustomDebugInfos() { var list = new List(); readerModule.InitializeCustomDebugInfos(new MDToken(MDToken.Table, origRid), gpContext, list); Interlocked.CompareExchange(ref customDebugInfos, list, null); } /// /// Constructor /// /// The module which contains this StandAloneSig row /// Row ID /// Generic parameter context /// If is null /// If is invalid public StandAloneSigMD(ModuleDefMD readerModule, uint rid, GenericParamContext gpContext) { #if DEBUG if (readerModule is null) throw new ArgumentNullException("readerModule"); if (readerModule.TablesStream.StandAloneSigTable.IsInvalidRID(rid)) throw new BadImageFormatException($"StandAloneSig rid {rid} does not exist"); #endif origRid = rid; this.rid = rid; this.readerModule = readerModule; this.gpContext = gpContext; bool b = readerModule.TablesStream.TryReadStandAloneSigRow(origRid, out var row); Debug.Assert(b); signature = readerModule.ReadSignature(row.Signature, gpContext); } } }