public static IMethod ResolveOrImport(this PatchConfiguration patch, ModuleDef module, MethodBase method)
{
if (patch.TryResolve(module, method.ToSignature(), out MethodDef def))
{
return(def);
}
return(new MemberRefUser(module, method.GetName(), module.ToSig(method.ToSignature()), patch.ResolveOrImport(module, method.DeclaringType)));
}
private static TypeMixin.Builder LoadMixin(this PatchConfiguration patch, TypeInfo type)
{
TypeMixin.Builder builder = new TypeMixin.Builder(patch.LoadDependency(type), patch.LoadInject(type));
foreach (MethodBase method in type.AllMethods().Where(IsMixin))
{
builder.Mixin(new MethodMixin(method.ToSignature(), method.ApplyMixin(patch)));
}
return(builder);
}
public static IField ResolveOrImport(this PatchConfiguration patch, ModuleDef module, FieldInfo field)
{
if (patch.TryResolve(module, field.ToSignature(), out FieldDef def))
{
return(def);
}
MemberRef fieldRef = module.Import(field);
fieldRef.Name = field.GetName();
return(fieldRef);
}
private static TypeInject.Builder LoadInject(this PatchConfiguration patch, TypeInfo type)
{
TypeInject.Builder builder = new TypeInject.Builder(type.ToDescriptor());
foreach (FieldInfo field in type.DeclaredFields.Where(IsInject))
{
builder.Inject(new FieldInject(field.ToDescriptor(), a => { }));
}
foreach (MethodInfo method in type.AllMethods().Where(IsInject))
{
builder.Inject(new MethodInject(method.ToDescriptor(), method.ApplyInject(patch)));
}
return(builder);
}
public static Action <MethodDef> ApplyInject(this MethodBase inject, PatchConfiguration patch) => stub =>
{
CilBody stubBody = stub.Body;
MethodBody injectBody = inject.GetMethodBody();
List <Instruction> originalIL = new List <Instruction>(stubBody.Instructions);
List <Local> originalLocals = new List <Local>(stubBody.Variables);
stubBody.Variables.Clear();
foreach (LocalVariableInfo local in injectBody.LocalVariables.OrderBy(lvi => lvi.LocalIndex))
{
stubBody.Variables.Add(stub.Module.ToDNLib(local));
}
List <Instruction> mixinIL = new CilParser(inject.Module, stubBody.Variables, injectBody.GetILAsByteArray()).Parse();
mixinIL.SimplifyMacros(stubBody.Variables, stub.Parameters);
IList <Instruction> newIL = stubBody.Instructions;
newIL.Clear();
foreach (Instruction inst in mixinIL)
{
switch (inst.Operand)
{
case FieldInfo field:
inst.Operand = patch.ResolveOrImport(stub.Module, field);
break;
case MethodBase method:
if (method.IsDefined(typeof(BaseDependencyAttribute)))
{
throw new InvalidOperationException("attempt to inject a body with a base dependency call");
}
inst.Operand = patch.ResolveOrImport(stub.Module, method);
break;
case Type type:
inst.Operand = patch.ResolveOrImport(stub.Module, type);
break;
case byte[] blob:
throw new NotImplementedException("how do you import this?");
case MemberInfo member:
throw new NotImplementedException("how do you import this?");
}
newIL.Add(inst);
}
stubBody.ExceptionHandlers.Clear();
foreach (ExceptionHandlingClause ehc in injectBody.ExceptionHandlingClauses)
{
stubBody.ExceptionHandlers.Add(ehc.ToDNLib(stub.Module, newIL));
}
stubBody.OptimizeMacros();
};
public static ITypeDefOrRef ResolveOrImport(this PatchConfiguration patch, ModuleDef module, Type type)
{
if (patch.TryResolve(module, type.ToSignature(), out TypeDef def))
{
return(def);
}
type = AppDomain.CurrentDomain.GetAssemblies().Select(a => a.GetType(type.GetName())).First(t => t != null);
return(module.Import(type));
/*string fullName = type.GetName();
* int nsEnd = fullName.LastIndexOf('.');
* string ns = null, name = fullName;
* if (nsEnd >= 0)
* {
* ns = fullName.Substring(0, nsEnd);
* name = fullName.Substring(nsEnd + 1);
* }
* return new TypeRefUser(module, ns, name, new AssemblyNameInfo(type.Assembly.GetName()).ToAssemblyRef());//new AssemblyRefUser(module, type.Module.Name.Substring(0, type.Module.Name.Length - 4)));*/
}
private static TypeDependency.Builder LoadDependency(this PatchConfiguration patch, TypeInfo type)
{
TypeSignature typeSig = type.ToSignature();
TypeSignature mixinTypeSig = type.ToMixinSignature();
patch.AddSubstitution(mixinTypeSig, typeSig);
TypeDependency.Builder builder = new TypeDependency.Builder(type.ToDescriptor());
foreach (FieldInfo field in type.DeclaredFields.Where(IsDependency))
{
patch.AddSubstitution(mixinTypeSig.Field(field.GetName(), field.FieldType.ToSignature()), typeSig.Field(field.GetName(), field.FieldType.ToSignature()));
builder.FieldDependency(field.ToSignature(), field.Import());
}
foreach (MethodBase method in type.AllMethods().Where(IsDependency))
{
IEnumerable <Func <ModuleDef, TypeSig> > parameterTypes = method.GetParameters().Select(p => p.ParameterType.ToSig()).ToArray();
patch.AddSubstitution(mixinTypeSig.Method(method.GetName(), method.CallingConvention.ToPatcher(), parameterTypes), typeSig.Method(method.GetName(), method.CallingConvention.ToPatcher(), parameterTypes));
builder.MethodDependency(method.ToSignature(), method.Import());
}
return(builder);
}
public static PatchConfiguration ToPatch(this Assembly assembly, string patchName)
{
assembly.LoadReferencedAssemblies();
PatchConfiguration patch = new PatchConfiguration(patchName, assembly.ManifestModule.GetCustomAttribute <PatchAttribute>().Assembly, assembly.ManifestModule.GetCustomAttributes <RequiredAttribute>().Select(a => a.Assembly));
foreach (TypeInfo type in assembly.DefinedTypes)
{
if (type.IsInject())
{
patch.AddInjected(patch.LoadInject(type));
}
if (type.IsDependencyExplicit())
{
patch.AddDependency(patch.LoadDependency(type));
}
if (type.IsMixin())
{
patch.AddMixin(patch.LoadMixin(type));
}
}
return(patch);
}
public static Action <MethodDef> ApplyMixin(this MethodBase mixin, PatchConfiguration patch) => original =>
{
CilBody originalBody = original.Body;
MethodBody mixinBody = mixin.GetMethodBody();
List <Instruction> originalIL = new List <Instruction>(originalBody.Instructions);
List <Local> originalLocals = new List <Local>(originalBody.Variables);
originalBody.Variables.Clear();
foreach (LocalVariableInfo local in mixinBody.LocalVariables.OrderBy(lvi => lvi.LocalIndex))
{
originalBody.Variables.Add(original.Module.ToDNLib(local));
}
List <Instruction> mixinIL = new CilParser(mixin.Module, originalBody.Variables, mixinBody.GetILAsByteArray()).Parse();
mixinIL.SimplifyMacros(originalBody.Variables, original.Parameters);
IList <Instruction> newIL = originalBody.Instructions;
newIL.Clear();
int ilStart = 0;
if (mixin.IsConstructor)
{
foreach (Instruction inst in mixin.IsDefined(typeof(RewriteBaseAttribute)) ? mixinIL : originalIL)
{
ilStart++;
newIL.Add(inst);
if (inst.OpCode.FlowControl == FlowControl.Call)
{
break;
}
}
RemoveCall(originalIL);
RemoveCall(mixinIL);
}
MethodDef baseCopy = new MethodDefUser(original.DeclaringType.FindUnusedMethodName(original.Name + "<Base>$"), original.MethodSig, original.ImplAttributes, original.Attributes & CopyMask | CopyAttr);
bool useBase = false;
foreach (Instruction inst in mixinIL)
{
switch (inst.Operand)
{
case FieldInfo field:
inst.Operand = patch.ResolveOrImport(original.Module, field);
break;
case MethodBase method:
if (method.IsDefined(typeof(BaseDependencyAttribute)))
{
useBase = true;
inst.Operand = baseCopy;
break;
}
inst.Operand = patch.ResolveOrImport(original.Module, method);
break;
case Type type:
inst.Operand = patch.ResolveOrImport(original.Module, type);
break;
case byte[] blob:
throw new NotImplementedException("how do you import this?");
case MemberInfo member:
throw new NotImplementedException("how do you import this?");
}
newIL.Add(inst);
}
if (useBase)
{
baseCopy.Body = new CilBody(originalBody.InitLocals, originalIL, new List <ExceptionHandler>(originalBody.ExceptionHandlers), originalBody.Variables);
original.DeclaringType.Methods.Add(baseCopy);
}
originalBody.ExceptionHandlers.Clear();
foreach (ExceptionHandlingClause ehc in mixinBody.ExceptionHandlingClauses)
{
originalBody.ExceptionHandlers.Add(ehc.ToDNLib(original.Module, newIL));
}
originalBody.OptimizeMacros();
void RemoveCall(List <Instruction> il)
{
for (int index = 0; index < il.Count; index++)
{
if (il[index].OpCode.FlowControl != FlowControl.Call)
{
continue;
}
il.RemoveRange(0, index + 1);
break;
}
}
};
