80 lines
4.3 KiB
C#
80 lines
4.3 KiB
C#
/*
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Copyright 2017-2021 Katy Coe - http://www.djkaty.com - https://github.com/djkaty
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All rights reserved.
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*/
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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namespace Il2CppInspector.Reflection
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{
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// See: https://docs.microsoft.com/en-us/dotnet/api/system.reflection.customattributedata?view=netframework-4.8
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public class CustomAttributeData
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{
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// IL2CPP-specific data
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public TypeModel Model => AttributeType.Assembly.Model;
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public int Index { get; set; }
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// The type of the attribute
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public TypeInfo AttributeType { get; set; }
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public (ulong Start, ulong End) VirtualAddress =>
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// The last one will be wrong but there is no way to calculate it
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(Model.Package.CustomAttributeGenerators[Index], Model.Package.FunctionAddresses[Model.Package.CustomAttributeGenerators[Index]]);
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// C++ method names
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// TODO: Known issue here where we should be using CppDeclarationGenerator.TypeNamer to ensure uniqueness
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public string Name => $"{AttributeType.Name.ToCIdentifier()}_CustomAttributesCacheGenerator";
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// C++ method signature
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public string Signature => $"void {Name}(CustomAttributesCache *)";
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public override string ToString() => "[" + AttributeType.FullName + "]";
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// Get the machine code of the C++ function
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public byte[] GetMethodBody() => Model.Package.BinaryImage.ReadMappedBytes(VirtualAddress.Start, (int) (VirtualAddress.End - VirtualAddress.Start));
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// Get all the custom attributes for a given assembly, type, member or parameter
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private static IEnumerable<CustomAttributeData> getCustomAttributes(Assembly asm, int customAttributeIndex) {
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if (customAttributeIndex < 0)
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yield break;
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var pkg = asm.Model.Package;
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// Attribute type ranges weren't included before v21 (customASttributeGenerators was though)
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if (pkg.Version < 21)
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yield break;
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var range = pkg.AttributeTypeRanges[customAttributeIndex];
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for (var i = range.start; i < range.start + range.count; i++) {
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var typeIndex = pkg.AttributeTypeIndices[i];
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if (asm.Model.AttributesByIndices.TryGetValue(i, out var attribute)) {
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yield return attribute;
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continue;
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}
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attribute = new CustomAttributeData { Index = customAttributeIndex, AttributeType = asm.Model.TypesByReferenceIndex[typeIndex] };
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asm.Model.AttributesByIndices.TryAdd(i, attribute);
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yield return attribute;
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}
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}
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private static IList<CustomAttributeData> getCustomAttributes(Assembly asm, int token, int customAttributeIndex) =>
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getCustomAttributes(asm, asm.Model.GetCustomAttributeIndex(asm, token, customAttributeIndex)).ToList();
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public static IList<CustomAttributeData> GetCustomAttributes(Assembly asm) => getCustomAttributes(asm, asm.MetadataToken, asm.AssemblyDefinition.customAttributeIndex);
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public static IList<CustomAttributeData> GetCustomAttributes(EventInfo evt) => getCustomAttributes(evt.Assembly, evt.MetadataToken, evt.Definition.customAttributeIndex);
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public static IList<CustomAttributeData> GetCustomAttributes(FieldInfo field) => getCustomAttributes(field.Assembly, field.MetadataToken, field.Definition.customAttributeIndex);
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public static IList<CustomAttributeData> GetCustomAttributes(MethodBase method) => getCustomAttributes(method.Assembly, method.MetadataToken, method.Definition.customAttributeIndex);
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public static IList<CustomAttributeData> GetCustomAttributes(ParameterInfo param) => getCustomAttributes(param.DeclaringMethod.Assembly, param.MetadataToken, param.Definition.customAttributeIndex);
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public static IList<CustomAttributeData> GetCustomAttributes(PropertyInfo prop)
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=> prop.Definition != null ? getCustomAttributes(prop.Assembly, prop.MetadataToken, prop.Definition.customAttributeIndex) : new List<CustomAttributeData>();
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public static IList<CustomAttributeData> GetCustomAttributes(TypeInfo type) => type.Definition != null? getCustomAttributes(type.Assembly, type.MetadataToken, type.Definition.customAttributeIndex) : new List<CustomAttributeData>();
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}
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}
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