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AppModel: IDA output integration; item groups

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This commit is contained in:
Katy Coe
2020-07-16 12:37:39 +02:00
parent f41fd74baa
commit 0808fe966a
5 changed files with 103 additions and 92 deletions
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4
Il2CppInspector.Common/Model/AppMethod.cs
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@@ -12,6 +12,10 @@ namespace Il2CppInspector.Model
// Class that represents a composite IL/C++ method
public class AppMethod
{
// The logical group this method is part of
// This is purely for querying methods in related groups and has no bearing on the code
public string Group { get; set; }
// The corresponding C++ function pointer type
public CppFnPtrType CppFnPtrType { get; internal set; }

51
Il2CppInspector.Common/Model/AppModel.cs
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@@ -26,16 +26,16 @@ namespace Il2CppInspector.Model
public CppCompilerType TargetCompiler { get; private set; }
// The Unity version used to build the binary
public UnityVersion UnityVersion { get; set; } // TODO: Change to private set after integrating IDA output
public UnityVersion UnityVersion { get; private set; }
// The Unity IL2CPP C++ headers for the binary
// Use this for code output
public UnityHeader UnityHeader { get; set; } // TODO: Change to private set after integrating IDA output
public UnityHeader UnityHeader { get; private set; }
// All of the C++ types used in the application including Unity internal types
// NOTE: This is for querying individual types for static analysis
// To generate code output, use DependencyOrderedCppTypes
public CppTypeCollection CppTypeCollection { get; set; } // TODO: Change to private set after integrating IDA output
public CppTypeCollection CppTypeCollection { get; private set; }
// All of the C++ types used in the application (.NET type translations only)
// The types are ordered to enable the production of code output without forward dependencies
@@ -53,6 +53,8 @@ namespace Il2CppInspector.Model
// For il2cpp < 19, the key is the string literal ordinal instead of the address
public Dictionary<ulong, string> Strings = new Dictionary<ulong, string>();
public bool StringIndexesAreOrdinals => Package.MetadataUsages == null;
// The .NET type model for the application
public TypeModel ILModel { get; }
@@ -64,8 +66,7 @@ namespace Il2CppInspector.Model
IEnumerator IEnumerable.GetEnumerator() => ((IEnumerable) CppTypeCollection).GetEnumerator();
// The C++ declaration generator for this binary
// TODO: Make this private once IDA output integration is completed
internal CppDeclarationGenerator declarationGenerator;
internal CppDeclarationGenerator declarationGenerator; // TODO: Make private when name integration completed
// Convenience properties
@@ -81,6 +82,16 @@ namespace Il2CppInspector.Model
// The Unity header text including word size define
public string UnityHeaderText => (WordSize == 32 ? "#define IS_32BIT\n" : "") + UnityHeader.GetHeaderText();
// The group that the next added type(s) will be placed in
private string group = string.Empty;
private string Group {
get => group;
set {
group = value;
CppTypeCollection.SetGroup(group);
}
}
// Initialize
public AppModel(TypeModel model) {
// Save .NET type model
@@ -120,30 +131,30 @@ namespace Il2CppInspector.Model
DependencyOrderedCppTypes = new List<CppType>();
// Add method definitions to C++ type model
CppTypeCollection.SetGroup("type_definitions");
Group = "types_from_methods";
foreach (var method in ILModel.MethodsByDefinitionIndex.Where(m => m.VirtualAddress.HasValue)) {
declarationGenerator.IncludeMethod(method);
AddTypes(declarationGenerator.GenerateRemainingTypeDeclarations());
var fnPtr = declarationGenerator.GenerateMethodDeclaration(method);
Methods.Add(method, fnPtr, new AppMethod(method, fnPtr));
Methods.Add(method, fnPtr, new AppMethod(method, fnPtr) {Group = Group});
}
// Add generic methods to C++ type model
CppTypeCollection.SetGroup("types_from_generics");
Group = "types_from_generic_methods";
foreach (var method in ILModel.GenericMethods.Values.Where(m => m.VirtualAddress.HasValue)) {
declarationGenerator.IncludeMethod(method);
AddTypes(declarationGenerator.GenerateRemainingTypeDeclarations());
var fnPtr = declarationGenerator.GenerateMethodDeclaration(method);
Methods.Add(method, fnPtr, new AppMethod(method, fnPtr));
Methods.Add(method, fnPtr, new AppMethod(method, fnPtr) {Group = Group});
}
// Add metadata usage types to C++ type model
// Not supported in il2cpp <19
CppTypeCollection.SetGroup("types_from_usages");
Group = "types_from_usages";
if (Package.MetadataUsages != null)
foreach (var usage in Package.MetadataUsages) {
@@ -168,12 +179,12 @@ namespace Il2CppInspector.Model
Debug.Assert(type.IsPointer);
// TODO: This should really be handled by CppDeclarationGenerator, and doesn't generate the full definition
var cppType = CppTypeCollection.Struct(declarationGenerator.TypeNamer.GetName(type) + "__TypeInfo");
var cppType = CppTypeCollection.Struct(declarationGenerator.TypeNamer.GetName(type));
var cppObjectType = (CppComplexType) CppTypeCollection["Il2CppObject"];
cppType.Fields = new SortedDictionary<int, List<CppField>>(cppObjectType.Fields);
DependencyOrderedCppTypes.Add(cppType);
Types.Add(type, cppType, new AppType(type, cppType, cppClassPtr: address));
Types.Add(type, cppType, new AppType(type, cppType, cppClassPtr: address) {Group = Group});
}
else
// Regular type definition
@@ -181,7 +192,7 @@ namespace Il2CppInspector.Model
else if (!Types.ContainsKey(type))
// Generic type definition has no associated C++ type, therefore no dictionary sub-key
Types.Add(type, new AppType(type, null, cppTypeRefPtr: address));
Types.Add(type, new AppType(type, null, cppTypeRefPtr: address) {Group = Group});
else
// Regular type reference
Types[type].TypeRefPtrAddress = address;
@@ -232,11 +243,17 @@ namespace Il2CppInspector.Model
// Create composite types
foreach (var type in types)
if (!Types.ContainsKey(type.ilType))
Types.Add(type.ilType, type.referenceType, new AppType(type.ilType, type.referenceType, type.valueType));
Types.Add(type.ilType, type.referenceType, new AppType(type.ilType, type.referenceType, type.valueType) {Group = Group});
}
// Get all the types for a group
public IEnumerable<CppType> GetTypeGroup(string groupName) => CppTypeCollection.GetTypeGroup(groupName);
public IEnumerable<CppType> GetDependencyOrderedTypeGroup(string groupName) => DependencyOrderedCppTypes.Where(t => t.Group == groupName);
// Get all the C++ types for a group
public IEnumerable<CppType> GetCppTypeGroup(string groupName) => CppTypeCollection.GetTypeGroup(groupName);
public IEnumerable<CppType> GetDependencyOrderedCppTypeGroup(string groupName) => DependencyOrderedCppTypes.Where(t => t.Group == groupName);
// Get all the composite types for a group
public IEnumerable<AppType> GetTypeGroup(string groupName) => Types.Values.Where(t => t.Group == groupName);
// Get all the composite methods for a group
public IEnumerable<AppMethod> GetMethodGroup(string groupName) => Methods.Values.Where(m => m.Group == groupName);
}
}

4
Il2CppInspector.Common/Model/AppType.cs
View File

@@ -11,6 +11,10 @@ namespace Il2CppInspector.Model
{
public class AppType
{
// The logical group this type is part of
// This is purely for querying types in related groups and has no bearing on the code
public string Group { get; set; }
// The corresponding C++ type definition which represents an instance of the object
// This is derived from Il2CppObject
// If the underlying .NET type is a struct (value type), this will return the boxed version

8
Il2CppInspector.Common/Outputs/CppScaffolding.cs
View File

@@ -37,9 +37,9 @@ namespace Il2CppInspector.Outputs
writeCode("namespace app {");
writeLine("");
writeTypesForGroup("Application type definitions", "type_definitions");
writeTypesForGroup("Application generic method type usages", "types_from_generics");
writeTypesForGroup("Application type usages", "types_from_usages");
writeTypesForGroup("Application types from method calls", "types_from_methods");
writeTypesForGroup("Application types from generic methods", "types_from_generic_methods");
writeTypesForGroup("Application types from usages", "types_from_usages");
writeCode("}");
@@ -53,7 +53,7 @@ namespace Il2CppInspector.Outputs
private void writeTypesForGroup(string header, string group) {
writeSectionHeader(header);
foreach (var cppType in model.GetDependencyOrderedTypeGroup(group))
foreach (var cppType in model.GetDependencyOrderedCppTypeGroup(group))
writeCode(cppType.ToString());
}

128
Il2CppInspector.Common/Outputs/IDAPythonScript.cs
View File

@@ -16,22 +16,12 @@ namespace Il2CppInspector.Outputs
{
public class IDAPythonScript
{
// TODO: Make this readonly when we've integrated with ApplicationModel
private AppModel model;
private readonly AppModel model;
private StreamWriter writer;
// TODO: Remove when integrated with ApplicationModel
private CppDeclarationGenerator declGenerator;
public IDAPythonScript(AppModel model) => this.model = model;
public void WriteScriptToFile(string outputFile) {
// TODO: Integrate with ApplicationModel - use this hack so we can use CppDeclarationGenerator without disturbing the model passed in
var internalModel = new AppModel(model.ILModel);
internalModel.UnityVersion = model.UnityVersion;
internalModel.UnityHeader = model.UnityHeader;
internalModel.CppTypeCollection = CppTypeCollection.FromUnityHeaders(model.UnityHeader, model.WordSize);
model = internalModel;
declGenerator = new CppDeclarationGenerator(model);
using var fs = new FileStream(outputFile, FileMode.Create);
writer = new StreamWriter(fs, Encoding.UTF8);
@@ -93,10 +83,12 @@ typedef __int64 int64_t;
private void writeMethods() {
writeSectionHeader("Method definitions");
writeMethods(model.ILModel.MethodsByDefinitionIndex);
writeTypes(model.GetDependencyOrderedCppTypeGroup("types_from_methods"));
writeMethods(model.GetMethodGroup("types_from_methods"));
writeSectionHeader("Constructed generic methods");
writeMethods(model.ILModel.GenericMethods.Values);
writeTypes(model.GetDependencyOrderedCppTypeGroup("types_from_generic_methods"));
writeMethods(model.GetMethodGroup("types_from_generic_methods"));
writeSectionHeader("Custom attributes generators");
foreach (var method in model.ILModel.AttributesByIndices.Values.Where(m => m.VirtualAddress.HasValue)) {
@@ -113,13 +105,16 @@ typedef __int64 int64_t;
}
}
private void writeMethods(IEnumerable<MethodBase> methods) {
foreach (var method in methods.Where(m => m.VirtualAddress.HasValue)) {
declGenerator.IncludeMethod(method);
writeDecls(declGenerator.GenerateRemainingTypeDeclarations());
var address = method.VirtualAddress.Value.Start;
writeTypedName(address, declGenerator.GenerateMethodDeclaration(method).ToSignatureString(), declGenerator.GlobalNamer.GetName(method));
writeComment(address, method);
private void writeTypes(IEnumerable<CppType> types) {
foreach (var type in types)
writeDecls(type.ToString());
}
private void writeMethods(IEnumerable<AppMethod> methods) {
foreach (var method in methods) {
var address = method.MethodCodeAddress;
writeTypedName(address, method.CppFnPtrType.ToSignatureString(), method.CppFnPtrType.Name);
writeComment(address, method.Method);
}
}
@@ -129,59 +124,58 @@ typedef __int64 int64_t;
}
private void writeUsages() {
if (model.Package.MetadataUsages == null) {
/* Version < 19 calls `il2cpp_codegen_string_literal_from_index` to get string literals.
* Unfortunately, metadata references are just loose globals in Il2CppMetadataUsage.cpp
* so we can't automatically name those. Next best thing is to define an enum for the strings. */
// String literals
// For version < 19
if (model.StringIndexesAreOrdinals) {
var enumSrc = new StringBuilder();
enumSrc.Append("enum StringLiteralIndex {\n");
for (int i = 0; i < model.Package.StringLiterals.Length; i++) {
var str = model.Package.StringLiterals[i];
enumSrc.Append($" STRINGLITERAL_{i}_{stringToIdentifier(str)},\n");
}
foreach (var str in model.Strings)
enumSrc.Append($" STRINGLITERAL_{str.Key}_{stringToIdentifier(str.Value)},\n");
enumSrc.Append("};\n");
writeDecls(enumSrc.ToString());
return;
}
var stringType = declGenerator.AsCType(model.ILModel.TypesByFullName["System.String"]);
foreach (var usage in model.Package.MetadataUsages) {
var address = usage.VirtualAddress;
string name;
// For version >= 19
else {
var stringType = model.CppTypeCollection.GetType("String *");
switch (usage.Type) {
case MetadataUsageType.StringLiteral:
var str = model.ILModel.GetMetadataUsageName(usage);
writeTypedName(address, stringType.ToString(), $"StringLiteral_{stringToIdentifier(str)}");
writeComment(address, str);
break;
case MetadataUsageType.Type:
case MetadataUsageType.TypeInfo:
var type = model.ILModel.GetMetadataUsageType(usage);
declGenerator.IncludeType(type);
writeDecls(declGenerator.GenerateRemainingTypeDeclarations());
name = declGenerator.TypeNamer.GetName(type);
if (usage.Type == MetadataUsageType.TypeInfo)
writeTypedName(address, $"struct {name}__Class *", $"{name}__TypeInfo");
else
writeTypedName(address, $"struct Il2CppType *", $"{name}__TypeRef");
writeComment(address, type.CSharpName);
break;
case MetadataUsageType.MethodDef:
case MetadataUsageType.MethodRef:
var method = model.ILModel.GetMetadataUsageMethod(usage);
declGenerator.IncludeMethod(method);
writeDecls(declGenerator.GenerateRemainingTypeDeclarations());
name = declGenerator.GlobalNamer.GetName(method);
writeTypedName(address, "struct MethodInfo *", $"{name}__MethodInfo");
writeComment(address, method);
break;
foreach (var str in model.Strings) {
writeTypedName(str.Key, stringType.ToString(), $"StringLiteral_{stringToIdentifier(str.Value)}");
writeComment(str.Key, str.Value);
}
}
// Metadata usage C++ type dependencies
var usageCppTypes = model.GetDependencyOrderedCppTypeGroup("types_from_usages");
writeTypes(usageCppTypes);
// Definition and reference addresses for all types from metadata usages
foreach (var type in model.Types.Values) {
// A type may have no addresses, for example an unreferenced array type
// Value types must not used the boxed definition
var name = type.CppValueType?.Name ?? type.CppType?.Name ?? model.declarationGenerator.TypeNamer.GetName(type.ILType);
if (type.TypeClassAddress != 0xffffffff_ffffffff) {
writeTypedName(type.TypeClassAddress, $"struct {name}__Class *", $"{name}__TypeInfo");
writeComment(type.TypeClassAddress, type.ILType.CSharpName);
}
if (type.TypeRefPtrAddress != 0xffffffff_ffffffff) {
// A generic type definition does not have any direct C++ types, but may have a reference
writeTypedName(type.TypeRefPtrAddress, "struct Il2CppType *", $"{name}__TypeRef");
writeComment(type.TypeRefPtrAddress, type.ILType.CSharpName);
}
}
// Metedata usage methods
foreach (var method in model.Methods.Values.Where(m => m.MethodInfoPtrAddress != 0xffffffff_ffffffff)) {
writeTypedName(method.MethodInfoPtrAddress, "struct MethodInfo *", $"{method.CppFnPtrType.Name}__MethodInfo");
writeComment(method.MethodInfoPtrAddress, method.Method);
}
}
private void writeFunctions() {
@@ -225,14 +219,6 @@ typedef __int64 int64_t;
writeLine("idc.parse_decls('''" + declString + "''')");
}
// TODO: Temporary compatibility function, remove when integrated with ApplicationModel
private void writeDecls(List<(TypeInfo ilType, CppComplexType valueType, CppComplexType referenceType,
CppComplexType fieldsType, CppComplexType vtableType, CppComplexType staticsType)> types)
=> writeDecls(string.Join("\n",
types.SelectMany(t => new List<CppType> {t.vtableType, t.staticsType, t.fieldsType, t.valueType, t.referenceType})
.Where(t => t != null)
.Select(t => t.ToString())));
private void writeName(ulong address, string name) {
writeLine($"SetName({address.ToAddressString()}, r'{name.ToEscapedString()}')");
}