internal DllField(FieldDefinition f)
{
LayoutOffset = f.Offset;
DeclaringType = DllTypeRef.From(f.DeclaringType);
Type = DllTypeRef.From(f.FieldType);
Name = f.Name;
Offset = -1;
if (f.HasCustomAttributes)
{
foreach (var ca in f.CustomAttributes)
{
if (ca.AttributeType.Name == "FieldOffsetAttribute")
{
if (ca.Fields.Count > 0)
{
Offset = Convert.ToInt32(ca.Fields.FirstOrDefault().Argument.Value as string, 16);
}
}
else
{
// Ignore the DummyDll attributes
var atr = new DllAttribute(ca);
if (!string.IsNullOrEmpty(atr.Name))
{
Attributes.Add(atr);
}
}
}
}
Specifiers.AddRange(DllSpecifierHelpers.From(f));
This = f;
Constant = f.Constant;
}
internal DllProperty(PropertyDefinition p)
{
DeclaringType = DllTypeRef.From(p.DeclaringType);
Type = DllTypeRef.From(p.PropertyType);
Name = p.Name;
GetMethod = p.GetMethod != null;
SetMethod = p.SetMethod != null;
if (p.HasCustomAttributes)
{
Attributes.AddRange(p.CustomAttributes.Select(ca => new DllAttribute(ca)).Where(a => !string.IsNullOrEmpty(a.Name)));
}
Specifiers.AddRange(DllSpecifierHelpers.From(p));
}
private ITypeData?Resolve(DllTypeRef typeRef)
{
// Generic parameters can never "Resolve"
if (typeRef.IsGenericParameter)
{
return(null);
}
// TODO: Resolve only among our types that we actually plan on serializing
// Basically, check it against our whitelist/blacklist
ITypeData ret;
if (typeRef.IsGenericInstance)
{
// This is a generic instance. We want to convert this instance to a generic type that we have already created in _types
var def = typeRef.This.Resolve();
var check = DllTypeRef.From(def);
// Try to get our Generic Definition out of _types
if (!_types.TryGetValue(check, out ret))
{
// This should never happen. All generic definitions should already be resolved.
throw new InvalidOperationException($"Generic instance: {typeRef} (definition: {check}) cannot map to any type in _types!");
}
return(ret);
}
if (!_types.TryGetValue(typeRef, out ret))
{
var def = typeRef.This.Resolve();
if (def != null)
{
ret = new DllTypeData(def, _config);
if (!_types.ContainsKey(ret.This))
{
Console.Error.WriteLine($"Too late to add {def} to Types!");
}
else
{
Console.Error.WriteLine($"{typeRef} already existed in _types?! Matching item: {_types[ret.This].This}");
ret = _types[ret.This];
}
}
else
{
throw new InvalidOperationException($"Non-generic-parameter {typeRef} cannot be resolved!");
}
}
return(ret);
}
internal DllTypeData(TypeDefinition def, DllConfig config)
{
_config = config;
foreach (var i in def.Interfaces)
{
ImplementingInterfaces.Add(DllTypeRef.From(i.InterfaceType));
}
This = DllTypeRef.From(def);
Type = def.IsEnum ? TypeEnum.Enum : (def.IsInterface ? TypeEnum.Interface : (def.IsValueType ? TypeEnum.Struct : TypeEnum.Class));
Info = new TypeInfo
{
Refness = def.IsValueType ? Refness.ValueType : Refness.ReferenceType
};
if (def.BaseType != null)
{
Parent = DllTypeRef.From(def.BaseType);
}
// TODO: Parse this eventually
TypeDefIndex = -1;
if (_config.ParseTypeAttributes && def.HasCustomAttributes)
{
Attributes.AddRange(def.CustomAttributes.Select(ca => new DllAttribute(ca)).Where(a => !string.IsNullOrEmpty(a.Name)));
}
Layout = (ITypeData.LayoutKind)(def.Attributes & TypeAttributes.LayoutMask);
if (_config.ParseTypeFields)
{
InstanceFields.AddRange(def.Fields.Where(f => !f.IsStatic).Select(f => new DllField(f)));
StaticFields.AddRange(def.Fields.Where(f => f.IsStatic).Select(f => new DllField(f)));
}
if (_config.ParseTypeProperties)
{
Properties.AddRange(def.Properties.Select(p => new DllProperty(p)));
}
if (_config.ParseTypeMethods)
{
var mappedBaseMethods = new HashSet <MethodDefinition>();
var methods = def.Methods.Select(m => DllMethod.From(m, ref mappedBaseMethods)).ToList();
// It's important that Foo.IBar.func() goes after func() (if present)
Methods.AddRange(methods.Where(m => m.ImplementedFrom is null));
Methods.AddRange(methods.Where(m => m.ImplementedFrom != null));
}
}
internal DllField(FieldDefinition f, TypeDefinition info)
{
LayoutOffset = f.Offset;
DeclaringType = DllTypeRef.From(f.DeclaringType);
Type = DllTypeRef.From(f.FieldType);
Name = f.Name;
Offset = -1;
if (f.HasCustomAttributes)
{
foreach (var ca in f.CustomAttributes)
{
if (ca.AttributeType.Name == "FieldOffsetAttribute" || ca.AttributeType.Name == "StaticFieldOffsetAttribute")
{
if (ca.Fields.Count > 0)
{
Offset = Convert.ToInt32(ca.Fields.FirstOrDefault().Argument.Value as string, 16);
}
//if (info.IsEnum)
// // Because Il2CppInspector is bad and emits 0x10 for fields on enums. I seriously don't know why.
// Offset -= 0x10;
}
else
{
// Ignore the DummyDll attributes
var atr = new DllAttribute(ca);
if (!string.IsNullOrEmpty(atr.Name))
{
Attributes.Add(atr);
}
}
}
}
Specifiers.AddRange(DllSpecifierHelpers.From(f));
This = f;
Constant = f.Constant;
}
internal DllData(string dir, DllConfig config)
{
_config = config;
_dir = dir;
AddSearchDirectory(dir);
_metadataResolver = new MetadataResolver(this);
_readerParams = new ReaderParameters(ReadingMode.Immediate)
{
AssemblyResolver = this,
MetadataResolver = _metadataResolver
};
var modules = new List <ModuleDefinition>();
foreach (var file in Directory.GetFiles(dir))
{
if (file.EndsWith(".dll") && !_config.BlacklistDlls.Contains(file))
{
var assemb = AssemblyDefinition.ReadAssembly(file, _readerParams);
foreach (var module in assemb.Modules)
{
modules.Add(module);
}
}
}
Queue <TypeDefinition> frontier = new Queue <TypeDefinition>();
modules.ForEach(m => m.Types.ToList().ForEach(t =>
{
if (_config.ParseTypes && !_config.BlacklistTypes.Contains(t.Name))
{
frontier.Enqueue(t);
}
}));
while (frontier.Count > 0)
{
var t = frontier.Dequeue();
if (t.Name.StartsWith("<") && t.Namespace.Length == 0 && t.DeclaringType is null)
{
if (!t.Name.StartsWith("<Module>") && !t.Name.StartsWith("<PrivateImplementationDetails>"))
{
Console.Error.WriteLine($"Skipping TypeDefinition {t}");
}
continue;
}
var dllRef = DllTypeRef.From(t);
if (!_types.ContainsKey(dllRef))
{
var type = new DllTypeData(t, _config);
if (dllRef.DeclaringType != null)
{
_types[dllRef.DeclaringType].NestedTypes.AddOrThrow(type);
}
foreach (var nested in t.NestedTypes)
{
frontier.Enqueue(nested);
}
_types.Add(dllRef, type);
}
else
{
Console.Error.WriteLine($"{dllRef} already in _types! Matching item: {_types[dllRef].This}");
}
}
int total = DllTypeRef.Hits + DllTypeRef.Misses;
Console.WriteLine($"{nameof(DllTypeRef)} cache hits: {DllTypeRef.Hits} / {total} = {100.0f * DllTypeRef.Hits / total}");
// Ignore images for now.
}
private DllMethod(MethodDefinition m, ref HashSet <MethodDefinition> mappedBaseMethods)
{
cache.Add(m, this);
This = m;
// Il2CppName is the MethodDefinition Name (hopefully we don't need to convert it for il2cpp, but we might)
Il2CppName = m.Name;
Name = m.Name;
Parameters.AddRange(m.Parameters.Select(p => new Parameter(p)));
Specifiers.AddRange(DllSpecifierHelpers.From(m));
// This is not necessary: m.GenericParameters.Any(param => !m.DeclaringType.GenericParameters.Contains(param));
Generic = m.HasGenericParameters;
GenericParameters = m.GenericParameters.Select(g => DllTypeRef.From(g)).ToList();
// This may not always be the case, we could have a special name in which case we have to do some sorcery
// Grab the special name, grab the type from the special name
int idxDot = Name.LastIndexOf('.');
if (idxDot >= 2)
{
// Call a utilities function for converting a special name method to a proper base method
var baseMethod = m.GetSpecialNameBaseMethod(out var iface, idxDot);
if (baseMethod is null)
{
throw new Exception("Failed to find baseMethod for dotted method name!");
}
if (iface is null)
{
throw new Exception("Failed to get iface for dotted method name!");
}
if (!mappedBaseMethods.Add(baseMethod))
{
throw new InvalidOperationException($"Base method: {baseMethod} has already been overriden!");
}
// Only one base method for special named methods
BaseMethods.Add(From(baseMethod, ref mappedBaseMethods));
ImplementedFrom = DllTypeRef.From(iface);
}
else
{
var baseMethod = m.GetBaseMethod();
if (baseMethod == m)
{
var baseMethods = m.GetBaseMethods();
if (baseMethods.Count > 0)
{
HidesBase = true;
}
// We need to check here SPECIFICALLY for a method in our declaring type that shares the same name as us, since we could have the same BaseMethod as it.
// If either ourselves or a method of the same safe name (after . prefixes) exists, we need to ensure that only the one with the dots gets the base method
// It correctly describes.
// Basically, we need to take all our specially named methods on our type that have already been defined and remove them from our current list of baseMethods.
// We should only ever have baseMethods of methods that are of methods that we haven't already used yet.
if (baseMethods.Count > 0)
{
foreach (var baseM in mappedBaseMethods)
{
baseMethods.Remove(baseM);
}
}
foreach (var bm in baseMethods)
{
BaseMethods.Add(From(bm, ref mappedBaseMethods));
}
}
else
{
if (!mappedBaseMethods.Add(baseMethod))
{
throw new InvalidOperationException($"Base method: {baseMethod} has already been overriden!");
}
BaseMethods.Add(From(baseMethod, ref mappedBaseMethods));
}
}
if (BaseMethods.Count > 0)
{
// TODO: This may not be true for generic methods. Should ensure validity for IEnumerator<T> methods
// This method is an implemented/overriden method.
// TODO: We need to double check to see if we need multiple ImplementedFroms
ImplementedFrom = BaseMethods.First().DeclaringType;
// Add ourselves to our BaseMethod's ImplementingMethods
foreach (var bm in BaseMethods)
{
bm.ImplementingMethods.Add(this);
}
}
ReturnType = DllTypeRef.From(m.ReturnType);
DeclaringType = DllTypeRef.From(m.DeclaringType);
// This is a very rare condition that we need to handle if it ever happens, but for now just log it
if (m.HasOverrides)
{
Console.WriteLine($"{m}.HasOverrides!!! Overrides: {string.Join(", ", m.Overrides)}");
}
RVA = -1;
Offset = -1;
VA = -1;
Slot = -1;
if (m.HasCustomAttributes)
{
foreach (var ca in m.CustomAttributes)
{
if (ca.AttributeType.Name == "AddressAttribute")
{
if (ca.Fields.Count >= 3)
{
for (int i = 0; i < ca.Fields.Count; i++)
{
var f = ca.Fields[i];
if (f.Name == "RVA" || f.Name == "Offset" || f.Name == "VA")
{
var val = Convert.ToInt32(f.Argument.Value as string, 16);
if (f.Name == "RVA")
{
RVA = val;
}
else if (f.Name == "Offset")
{
Offset = val;
}
else if (f.Name == "VA")
{
VA = val;
}
}
else if (f.Name == "Slot")
{
Slot = Convert.ToInt32(f.Argument.Value as string);
}
}
}
}
else
{
// Ignore the DummyDll attributes
Attributes.Add(new DllAttribute(ca));
}
}
}
}