441 lines
23 KiB
C#
441 lines
23 KiB
C#
// Copyright (c) 2017-2019 Katy Coe - http://www.djkaty.com - https://github.com/djkaty
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// All rights reserved
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Reflection;
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using System.Text;
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using Il2CppInspector.Reflection;
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using CustomAttributeData = Il2CppInspector.Reflection.CustomAttributeData;
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using MethodInfo = Il2CppInspector.Reflection.MethodInfo;
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using TypeInfo = Il2CppInspector.Reflection.TypeInfo;
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namespace Il2CppInspector
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{
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public class Il2CppCSharpDumper
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{
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private readonly Il2CppModel model;
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// Namespace prefixes whose contents should be skipped
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public List<string> ExcludedNamespaces { get; set; }
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// Suppress types, fields and methods with the CompilerGenerated attribute; suppress the attribute itself from property getters and setters
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public bool SuppressGenerated { get; set; }
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// Suppress binary metadata in code comments
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public bool SuppressMetadata { get; set; }
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// Comment out custom attributes with non-optional constructor arguments
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public bool CommentAttributes { get; set; }
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private const string CGAttribute = "System.Runtime.CompilerServices.CompilerGeneratedAttribute";
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private const string FBAttribute = "System.Runtime.CompilerServices.FixedBufferAttribute";
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private const string ExtAttribute = "System.Runtime.CompilerServices.ExtensionAttribute";
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private const string DMAttribute = "System.Reflection.DefaultMemberAttribute";
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public Il2CppCSharpDumper(Il2CppModel model) => this.model = model;
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public void WriteSingleFile(string outFile) => WriteSingleFile(outFile, t => t.Index);
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public void WriteSingleFile<TKey>(string outFile, Func<TypeInfo, TKey> orderBy) => writeFile(outFile, model.Assemblies.SelectMany(x => x.DefinedTypes).OrderBy(orderBy));
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public void WriteFilesByNamespace<TKey>(string outPath, Func<TypeInfo, TKey> orderBy, bool flattenHierarchy) {
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var namespaces = model.Assemblies.SelectMany(x => x.DefinedTypes).GroupBy(t => t.Namespace);
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var usedAssemblyAttributes = new HashSet<CustomAttributeData>();
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foreach (var ns in namespaces) {
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writeFile($"{outPath}\\{(!string.IsNullOrEmpty(ns.Key)? ns.Key : "global").Replace('.', flattenHierarchy? '.' : '\\')}.cs",
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ns.OrderBy(orderBy), excludedAssemblyAttributes: usedAssemblyAttributes);
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usedAssemblyAttributes.UnionWith(ns.Select(t => t.Assembly).Distinct().SelectMany(a => a.CustomAttributes));
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}
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}
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public void WriteFilesByAssembly<TKey>(string outPath, Func<TypeInfo, TKey> orderBy) {
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foreach (var asm in model.Assemblies) {
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// Sort namespaces into alphabetical order, then sort types within the namespaces by the specified sort function
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writeFile($"{outPath}\\{asm.FullName}.cs", asm.DefinedTypes.OrderBy(t => t.Namespace).ThenBy(orderBy));
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}
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}
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public void WriteFilesByClass(string outPath, bool flattenHierarchy) {
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var usedAssemblyAttributes = new HashSet<CustomAttributeData>();
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foreach (var type in model.Assemblies.SelectMany(x => x.DefinedTypes)) {
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writeFile($"{outPath}\\{type.FullName.Replace('.', flattenHierarchy ? '.' : '\\')}.cs",
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new[] {type}, excludedAssemblyAttributes: usedAssemblyAttributes);
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usedAssemblyAttributes.UnionWith(type.Assembly.CustomAttributes);
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}
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}
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private void writeFile(string outFile, IEnumerable<TypeInfo> types, bool useNamespaceSyntax = true, IEnumerable<CustomAttributeData> excludedAssemblyAttributes = null) {
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var nsRefs = new HashSet<string>();
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var code = new StringBuilder();
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var nsContext = "";
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var usedTypes = new List<TypeInfo>();
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// Determine all namespace references (note: this may include some that aren't actually used due to output suppression in generateType()
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// We have to do this first so that we can generate properly scoped type references in the code
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foreach (var type in types) {
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var refs = type.GetAllTypeReferences();
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var ns = refs.Where(r => !string.IsNullOrEmpty(r.Namespace) && r.Namespace != type.Namespace).Select(r => r.Namespace);
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nsRefs.UnionWith(ns);
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}
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// Determine assemblies used in this file
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var assemblies = types.Select(t => t.Assembly).Distinct();
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// Add assembly attribute namespaces to reference list
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nsRefs.UnionWith(assemblies.SelectMany(a => a.CustomAttributes).Select(a => a.AttributeType.Namespace));
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// Generate each type
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foreach (var type in types) {
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// Skip namespace and any children if requested
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if (ExcludedNamespaces?.Any(x => x == type.Namespace || type.Namespace.StartsWith(x + ".")) ?? false)
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continue;
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// Assembly.DefinedTypes returns nested types in the assembly by design - ignore them
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if (type.IsNested)
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continue;
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// Get code
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var text = generateType(type, nsRefs);
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if (string.IsNullOrEmpty(text))
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continue;
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// Determine if we need to change namespace (after we have established the code block is not empty)
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if (useNamespaceSyntax) {
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if (type.Namespace != nsContext) {
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if (!string.IsNullOrEmpty(nsContext))
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code.Remove(code.Length - 1, 1).Append("}\n\n");
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if (!string.IsNullOrEmpty(type.Namespace))
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code.Append("namespace " + type.Namespace + "\n{\n");
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nsContext = type.Namespace;
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}
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if (!string.IsNullOrEmpty(nsContext)) {
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text = "\t" + text.Replace("\n", "\n\t");
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text = text.Remove(text.Length - 1);
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}
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}
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// Append namespace
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if (!useNamespaceSyntax)
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code.Append($"// Namespace: {(!string.IsNullOrEmpty(type.Namespace) ? type.Namespace : "<global namespace>")}\n");
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// Append type definition
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code.Append(text + "\n");
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// Add to list of used types
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usedTypes.Add(type);
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}
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// Stop if nothing to output
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if (!usedTypes.Any())
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return;
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// Close namespace
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if (useNamespaceSyntax && !string.IsNullOrEmpty(nsContext))
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code.Remove(code.Length - 1, 1).Append("}\n");
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// Determine using directives (put System namespaces first)
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nsRefs.Clear();
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foreach (var type in usedTypes) {
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var refs = type.GetAllTypeReferences();
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var ns = refs.Where(r => !string.IsNullOrEmpty(r.Namespace) && r.Namespace != type.Namespace).Select(r => r.Namespace);
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nsRefs.UnionWith(ns);
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}
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nsRefs.UnionWith(assemblies.SelectMany(a => a.CustomAttributes).Select(a => a.AttributeType.Namespace));
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var usings = nsRefs.OrderBy(n => (n.StartsWith("System.") || n == "System") ? "0" + n : "1" + n);
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// Ensure output directory exists
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if (!string.IsNullOrEmpty(Path.GetDirectoryName(outFile)))
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Directory.CreateDirectory(Path.GetDirectoryName(outFile));
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// Create output file
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using StreamWriter writer = new StreamWriter(new FileStream(outFile, FileMode.Create), Encoding.UTF8);
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// Write preamble
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writer.Write(@"/*
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* Generated code file by Il2CppInspector - http://www.djkaty.com - https://github.com/djkaty
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*/
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");
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// Output using directives
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writer.Write(string.Concat(usings.Select(n => $"using {n};\n")));
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if (nsRefs.Any())
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writer.Write("\n");
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// Output assembly information and attributes
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writer.Write(generateAssemblyInfo(assemblies, nsRefs, excludedAssemblyAttributes) + "\n\n");
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// Output type definitions
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writer.Write(code);
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}
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private string generateAssemblyInfo(IEnumerable<Reflection.Assembly> assemblies, IEnumerable<string> namespaces, IEnumerable<CustomAttributeData> excludedAttributes = null) {
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var text = new StringBuilder();
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foreach (var asm in assemblies) {
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text.Append($"// Image {asm.Index}: {asm.FullName} - {asm.ImageDefinition.typeStart}-{asm.ImageDefinition.typeStart + asm.ImageDefinition.typeCount - 1}\n");
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// Assembly-level attributes
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text.Append(asm.CustomAttributes.Where(a => a.AttributeType.FullName != ExtAttribute)
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.Except(excludedAttributes ?? new List<CustomAttributeData>())
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.OrderBy(a => a.AttributeType.Name)
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.ToString(new Scope { Current = null, Namespaces = namespaces }, attributePrefix: "assembly: ", emitPointer: !SuppressMetadata, mustCompile: CommentAttributes));
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if (asm.CustomAttributes.Any())
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text.Append("\n");
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}
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return text.ToString().TrimEnd();
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}
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private string generateType(TypeInfo type, IEnumerable<string> namespaces, string prefix = "") {
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// Don't output compiler-generated types if desired
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if (SuppressGenerated && type.GetCustomAttributes(CGAttribute).Any())
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return string.Empty;
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var codeBlocks = new Dictionary<string, string>();
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var usedMethods = new List<MethodInfo>();
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var sb = new StringBuilder();
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var scope = new Scope {
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Current = type,
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Namespaces = namespaces
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};
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// Fields
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sb.Clear();
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if (!type.IsEnum) {
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foreach (var field in type.DeclaredFields) {
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if (SuppressGenerated && field.GetCustomAttributes(CGAttribute).Any())
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continue;
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if (field.IsNotSerialized)
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sb.Append(prefix + "\t[NonSerialized]\n");
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// Attributes
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sb.Append(field.CustomAttributes.Where(a => a.AttributeType.FullName != FBAttribute).OrderBy(a => a.AttributeType.Name)
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.ToString(scope, prefix + "\t", emitPointer: !SuppressMetadata, mustCompile: CommentAttributes));
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sb.Append(prefix + "\t");
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sb.Append(field.GetModifierString());
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// Fixed buffers
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if (field.GetCustomAttributes(FBAttribute).Any()) {
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if (!SuppressMetadata)
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sb.Append($"/* {field.GetCustomAttributes(FBAttribute)[0].VirtualAddress.ToAddressString()} */ ");
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sb.Append($"{field.FieldType.DeclaredFields[0].FieldType.GetScopedCSharpName(scope)} {field.Name}[0]"); // FixedElementField
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}
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// Regular fields
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else
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sb.Append($"{field.FieldType.GetScopedCSharpName(scope)} {field.Name}");
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if (field.HasDefaultValue)
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sb.Append($" = {field.DefaultValueString}");
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sb.Append(";");
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// Don't output field indices for const fields (they don't have any storage)
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if (!field.IsLiteral && !SuppressMetadata)
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sb.Append($" // 0x{(uint) field.Offset:X2}");
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// Output metadata file offset for const fields
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if (field.IsLiteral && !SuppressMetadata)
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sb.Append($" // Metadata: 0x{(uint) field.DefaultValueMetadataAddress:X8}");
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sb.Append("\n");
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}
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codeBlocks.Add("Fields", sb.ToString());
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}
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// Properties
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sb.Clear();
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foreach (var prop in type.DeclaredProperties) {
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// Attributes
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sb.Append(prop.CustomAttributes.OrderBy(a => a.AttributeType.Name)
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.ToString(scope, prefix + "\t", emitPointer: !SuppressMetadata, mustCompile: CommentAttributes));
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// The access mask enum values go from 1 (private) to 6 (public) in order from most to least restrictive
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var getAccess = (prop.GetMethod?.Attributes ?? 0) & MethodAttributes.MemberAccessMask;
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var setAccess = (prop.SetMethod?.Attributes ?? 0) & MethodAttributes.MemberAccessMask;
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var primary = getAccess >= setAccess ? prop.GetMethod : prop.SetMethod;
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sb.Append($"{prefix}\t{primary.GetModifierString(scope)}{prop.PropertyType.GetScopedCSharpName(scope)} ");
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// Non-indexer
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if ((!prop.CanRead || !prop.GetMethod.DeclaredParameters.Any()) && (!prop.CanWrite || prop.SetMethod.DeclaredParameters.Count == 1))
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sb.Append($"{prop.Name} {{ ");
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// Indexer
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else
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sb.Append("this[" + string.Join(", ", primary.DeclaredParameters.SkipLast(getAccess >= setAccess? 0 : 1)
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.Select(p => p.GetParameterString(scope, !SuppressMetadata, CommentAttributes))) + "] { ");
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sb.Append((prop.CanRead? prop.GetMethod.CustomAttributes.Where(a => !SuppressGenerated || a.AttributeType.FullName != CGAttribute)
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.ToString(scope, inline: true, emitPointer: !SuppressMetadata, mustCompile: CommentAttributes)
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+ (getAccess < setAccess? prop.GetMethod.GetAccessModifierString() : "") + "get; " : "")
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+ (prop.CanWrite? prop.SetMethod.CustomAttributes.Where(a => !SuppressGenerated || a.AttributeType.FullName != CGAttribute)
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.ToString(scope, inline: true, emitPointer: !SuppressMetadata, mustCompile: CommentAttributes)
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+ (setAccess < getAccess? prop.SetMethod.GetAccessModifierString() : "") + "set; " : "") + "}");
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if (!SuppressMetadata) {
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if ((prop.CanRead && prop.GetMethod.VirtualAddress != null) || (prop.CanWrite && prop.SetMethod.VirtualAddress != null))
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sb.Append(" // ");
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sb.Append((prop.CanRead && prop.GetMethod.VirtualAddress != null ? prop.GetMethod.VirtualAddress.ToAddressString() + " " : "")
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+ (prop.CanWrite && prop.SetMethod.VirtualAddress != null ? prop.SetMethod.VirtualAddress.ToAddressString() : ""));
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}
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sb.Append("\n");
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usedMethods.Add(prop.GetMethod);
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usedMethods.Add(prop.SetMethod);
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}
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codeBlocks.Add("Properties", sb.ToString());
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// Events
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sb.Clear();
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foreach (var evt in type.DeclaredEvents) {
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// Attributes
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sb.Append(evt.CustomAttributes.OrderBy(a => a.AttributeType.Name)
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.ToString(scope, prefix + "\t", emitPointer: !SuppressMetadata, mustCompile: CommentAttributes));
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string modifiers = evt.AddMethod?.GetModifierString(scope);
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sb.Append($"{prefix}\t{modifiers}event {evt.EventHandlerType.GetScopedCSharpName(scope)} {evt.Name} {{\n");
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var m = new Dictionary<string, (ulong, ulong)?>();
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if (evt.AddMethod != null) m.Add("add", evt.AddMethod.VirtualAddress);
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if (evt.RemoveMethod != null) m.Add("remove", evt.RemoveMethod.VirtualAddress);
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if (evt.RaiseMethod != null) m.Add("raise", evt.RaiseMethod.VirtualAddress);
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sb.Append(string.Join("\n", m.Select(x => $"{prefix}\t\t{x.Key};{(SuppressMetadata? "" : " // " + x.Value.ToAddressString())}")) + "\n" + prefix + "\t}\n");
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usedMethods.Add(evt.AddMethod);
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usedMethods.Add(evt.RemoveMethod);
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usedMethods.Add(evt.RaiseMethod);
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}
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codeBlocks.Add("Events", sb.ToString());
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// Nested types
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codeBlocks.Add("Nested types", string.Join("\n", type.DeclaredNestedTypes
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.Select(n => generateType(n, namespaces, prefix + "\t")).Where(c => !string.IsNullOrEmpty(c))));
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// Constructors
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sb.Clear();
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foreach (var method in type.DeclaredConstructors) {
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// Attributes
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sb.Append(method.CustomAttributes.OrderBy(a => a.AttributeType.Name)
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.ToString(scope, prefix + "\t", emitPointer: !SuppressMetadata, mustCompile: CommentAttributes));
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sb.Append($"{prefix}\t{method.GetModifierString(scope)}{method.DeclaringType.UnmangledBaseName}{method.GetTypeParametersString(scope)}(");
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sb.Append(method.GetParametersString(scope, !SuppressMetadata) + ")" + (method.IsAbstract? ";" : @" {}"));
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sb.Append((!SuppressMetadata && method.VirtualAddress != null ? $" // {method.VirtualAddress.ToAddressString()}" : "") + "\n");
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}
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codeBlocks.Add("Constructors", sb.ToString());
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// Methods
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// Don't re-output methods for constructors, properties, events etc.
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var methods = type.DeclaredMethods.Except(usedMethods).Where(m => m.CustomAttributes.All(a => a.AttributeType.FullName != ExtAttribute));
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codeBlocks.Add("Methods", string.Concat(methods.Select(m => generateMethod(m, scope, prefix))));
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usedMethods.AddRange(methods);
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// Extension methods
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codeBlocks.Add("Extension methods", string.Concat(type.DeclaredMethods.Except(usedMethods).Select(m => generateMethod(m, scope, prefix))));
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// Type declaration
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sb.Clear();
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if (type.IsImport)
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sb.Append(prefix + "[ComImport]\n");
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if (type.IsSerializable)
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sb.Append(prefix + "[Serializable]\n");
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// TODO: DefaultMemberAttribute should be output if it is present and the type does not have an indexer, otherwise suppressed
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// See https://docs.microsoft.com/en-us/dotnet/api/system.reflection.defaultmemberattribute?view=netframework-4.8
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sb.Append(type.CustomAttributes.Where(a => a.AttributeType.FullName != DMAttribute && a.AttributeType.FullName != ExtAttribute)
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.OrderBy(a => a.AttributeType.Name).ToString(scope, prefix, emitPointer: !SuppressMetadata, mustCompile: CommentAttributes));
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// Roll-up multicast delegates to use the 'delegate' syntactic sugar
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if (type.IsClass && type.IsSealed && type.BaseType?.FullName == "System.MulticastDelegate") {
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sb.Append(prefix + type.GetAccessModifierString());
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var del = type.GetMethod("Invoke");
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// IL2CPP doesn't seem to retain return type attributes
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//sb.Append(del.ReturnType.CustomAttributes.ToString(prefix, "return: ", emitPointer: !SuppressMetadata, mustCompile: CommentAttributes));
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if (del.RequiresUnsafeContext)
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sb.Append("unsafe ");
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sb.Append($"delegate {del.ReturnType.GetScopedCSharpName(scope)} {type.CSharpTypeDeclarationName}(");
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sb.Append(del.GetParametersString(scope, !SuppressMetadata) + ");");
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if (!SuppressMetadata)
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sb.Append($" // TypeDefIndex: {type.Index}; {del.VirtualAddress.ToAddressString()}");
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sb.Append("\n");
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return sb.ToString();
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}
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sb.Append(prefix + type.GetModifierString());
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var @base = type.ImplementedInterfaces.Select(x => x.GetScopedCSharpName(scope)).ToList();
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if (type.BaseType != null && type.BaseType.FullName != "System.Object" && type.BaseType.FullName != "System.ValueType" && !type.IsEnum)
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@base.Insert(0, type.BaseType.GetScopedCSharpName(scope));
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if (type.IsEnum && type.GetEnumUnderlyingType().FullName != "System.Int32") // enums derive from int by default
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@base.Insert(0, type.GetEnumUnderlyingType().GetScopedCSharpName(scope));
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var baseText = @base.Count > 0 ? " : " + string.Join(", ", @base) : string.Empty;
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sb.Append($"{type.CSharpTypeDeclarationName}{baseText}");
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if (!SuppressMetadata)
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sb.Append($" // TypeDefIndex: {type.Index}");
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sb.Append("\n");
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if (type.GenericTypeParameters != null)
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foreach (var gp in type.GenericTypeParameters) {
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var constraint = gp.GetTypeConstraintsString(scope);
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if (constraint != string.Empty)
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sb.Append($"{prefix}\t{constraint}\n");
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}
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sb.Append(prefix + "{\n");
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// Enumeration
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if (type.IsEnum) {
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sb.Append(string.Join(",\n", type.GetEnumNames().Zip(type.GetEnumValues().OfType<object>(),
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(k, v) => new { k, v }).OrderBy(x => x.v).Select(x => $"{prefix}\t{x.k} = {x.v}")) + "\n");
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}
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// Type definition
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else
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sb.Append(string.Join("\n", codeBlocks.Where(b => b.Value != string.Empty).Select(b => prefix + "\t// " + b.Key + "\n" + b.Value)));
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sb.Append(prefix + "}\n");
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return sb.ToString();
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}
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private string generateMethod(MethodInfo method, Scope scope, string prefix) {
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if (SuppressGenerated && method.GetCustomAttributes(CGAttribute).Any())
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return string.Empty;
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var writer = new StringBuilder();
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// Attributes
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writer.Append(method.CustomAttributes.Where(a => a.AttributeType.FullName != ExtAttribute).OrderBy(a => a.AttributeType.Name)
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.ToString(scope, prefix + "\t", emitPointer: !SuppressMetadata, mustCompile: CommentAttributes));
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// IL2CPP doesn't seem to retain return type attributes
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//writer.Append(method.ReturnType.CustomAttributes.ToString(prefix + "\t", "return: ", emitPointer: !SuppressMetadata));
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writer.Append($"{prefix}\t{method.GetModifierString(scope)}");
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if (method.Name != "op_Implicit" && method.Name != "op_Explicit")
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writer.Append($"{method.ReturnParameter.GetReturnParameterString(scope)} {method.CSharpName}{method.GetTypeParametersString(scope)}");
|
|
else
|
|
writer.Append($"{method.CSharpName}{method.ReturnType.GetScopedCSharpName(scope)}");
|
|
writer.Append("(" + method.GetParametersString(scope, !SuppressMetadata) + ")");
|
|
|
|
if (method.GenericTypeParameters != null)
|
|
foreach (var gp in method.GenericTypeParameters) {
|
|
var constraint = gp.GetTypeConstraintsString(scope);
|
|
if (constraint != string.Empty)
|
|
writer.Append($"\n{prefix}\t\t{constraint}");
|
|
}
|
|
|
|
var methodBody = method.ReturnType switch {
|
|
{ FullName: "System.Void" } => @"{}",
|
|
_ => "=> default;"
|
|
};
|
|
writer.Append((method.IsAbstract? ";" : " " + methodBody) + (!SuppressMetadata && method.VirtualAddress != null ? $" // {method.VirtualAddress.ToAddressString()}" : "") + "\n");
|
|
|
|
return writer.ToString();
|
|
}
|
|
}
|
|
}
|