static void mergeClassWithAllAncestors(NamespaceTypeDefinition mergeTargetClass, PeReader.DefaultHost host)
{
List <NamespaceTypeDefinition> ancestorClasses = new List <NamespaceTypeDefinition>();
ancestorClasses.Add(mergeTargetClass);
NamespaceTypeDefinition currentClass = mergeTargetClass;
NamespaceTypeDefinition ancestorClass = null;
while (true)
{
// get class from which was inherited
if (currentClass.BaseClasses.Count() == 1)
{
// only add base classes of type NamespaceTypeDefinition
if (currentClass.BaseClasses.ElementAt(0) as NamespaceTypeDefinition != null)
{
ancestorClass = (currentClass.BaseClasses.ElementAt(0) as NamespaceTypeDefinition);
}
// ignore ancestor that are not of type NamespaceTypeDefinition
else
{
break;
}
}
else
{
throw new ArgumentException("Do not know how to handle multiple inheritance.");
}
// add ancestor class to list of ancestor classes
globalLog.writeLine("Found ancestor: " + ancestorClass.ToString());
ancestorClasses.Add(ancestorClass);
currentClass = ancestorClass;
}
// mrge class with ancenstor (start with the "highest" ancestor)
for (int i = (ancestorClasses.Count - 1); i >= 0; i--)
{
globalLog.writeLine("Merge class \"" + ancestorClasses[i].ToString() + "\" with ancestor");
mergeClassWithAncestor(ancestorClasses[i], host);
globalLog.writeLine("");
}
}
// adds the given interface to the given class
public void addInterface(NamespaceTypeDefinition addTargetClass, ITypeDefinition interfaceToAdd)
{
// add interface to target class
if (addTargetClass.Interfaces != null)
{
// check if interface is already implemented by class
if (addTargetClass.Interfaces.Contains(interfaceToAdd))
{
this.logger.writeLine("Class \"" + addTargetClass.ToString() + "\" already implements interface \"" + interfaceToAdd.ToString() + "\"");
return;
}
else
{
this.logger.writeLine("Add interface \"" + interfaceToAdd.ToString() + "\" to class \"" + addTargetClass.ToString() + "\"");
addTargetClass.Interfaces.Add(interfaceToAdd);
}
}
else
{
List <ITypeReference> interfaceList = new List <ITypeReference>();
interfaceList.Add(interfaceToAdd);
addTargetClass.Interfaces = interfaceList;
}
// copy all attributes from the interface to the target class
if (interfaceToAdd.Fields != null)
{
foreach (FieldDefinition field in interfaceToAdd.Fields)
{
FieldDefinition copy = new FieldDefinition();
this.helperClass.copyField(copy, field);
copy.ContainingTypeDefinition = addTargetClass;
// set intern factory of the copied field to the one of the class
// (without it, the generated binary file will have strange results like use only the same field)
copy.InternFactory = addTargetClass.InternFactory;
addTargetClass.Fields.Add(copy);
}
}
// copy all methods from the interface to the target class
if (interfaceToAdd.Methods != null)
{
foreach (IMethodDefinition method in interfaceToAdd.Methods)
{
// search through all methods in the target class
// to see if this method was already added
bool foundMethod = false;
foreach (IMethodDefinition tempMethod in addTargetClass.Methods)
{
// skip constructors
if (tempMethod.IsConstructor)
{
continue;
}
// check if the number of parameters are the same
if (tempMethod.ParameterCount == method.ParameterCount)
{
// check if the parameters have the same type in the same order
bool parameterCorrect = true;
for (int i = 0; i < method.ParameterCount; i++)
{
if (method.Parameters.ElementAt(i).Type != tempMethod.Parameters.ElementAt(i).Type)
{
parameterCorrect = false;
break;
}
}
// check if the return type is the same
bool returnTypeCorrect = false;
if (method.Type.Equals(tempMethod.Type))
{
returnTypeCorrect = true;
}
// check if both methods are static
// (c# compiler does not allow static + non-static function with
// same signature in same class, but CIL does)
bool bothStatic = false;
if (method.IsStatic == tempMethod.IsStatic)
{
bothStatic = true;
}
// if the parameters and return type are correct => check the name
if (parameterCorrect && returnTypeCorrect && bothStatic)
{
if (method.Name.Equals(tempMethod.Name))
{
// if name is the same => method already added
foundMethod = true;
break;
}
}
}
}
// skip if method was already added
if (foundMethod)
{
this.logger.writeLine("Method \"" + method.Name.ToString() + "\" already exists");
continue;
}
this.logger.writeLine("Add method: " + method.Name.ToString());
// copy method
MethodDefinition copy = new MethodDefinition();
this.helperClass.copyMethod(copy, method);
copy.ContainingTypeDefinition = addTargetClass;
// generate random dead code for newly created method
ILGenerator ilGenerator = new ILGenerator(host, method);
foreach (IOperation tempOperation in CodeGenerator.generateDeadCode(true))
{
ilGenerator.Emit(tempOperation.OperationCode, tempOperation.Value);
}
IMethodBody newBody = new ILGeneratorMethodBody(ilGenerator, true, 8, method, Enumerable <ILocalDefinition> .Empty, Enumerable <ITypeDefinition> .Empty);
copy.Body = newBody;
// set intern factory of the copied method to the one of the class
// (without it, the generated binary file will have strange results like call always the same method)
copy.InternFactory = addTargetClass.InternFactory;
// set method to not abstract
copy.IsAbstract = false;
// set method to not external
copy.IsExternal = false;
// set intern factory of the copied method to the one of the class
// (without it, the generating of the binary file will have strange results)
copy.InternFactory = addTargetClass.InternFactory;
// add method to the class
addTargetClass.Methods.Add(copy);
}
}
}
// adds the given interface to the given class
public void addInterface(NamespaceTypeDefinition addTargetClass, ITypeDefinition interfaceToAdd) {
// add interface to target class
if (addTargetClass.Interfaces != null) {
// check if interface is already implemented by class
if (addTargetClass.Interfaces.Contains(interfaceToAdd)) {
this.logger.writeLine("Class \"" + addTargetClass.ToString() + "\" already implements interface \"" + interfaceToAdd.ToString() + "\"");
return;
}
else {
this.logger.writeLine("Add interface \"" + interfaceToAdd.ToString() + "\" to class \"" + addTargetClass.ToString() + "\"");
addTargetClass.Interfaces.Add(interfaceToAdd);
}
}
else {
List<ITypeReference> interfaceList = new List<ITypeReference>();
interfaceList.Add(interfaceToAdd);
addTargetClass.Interfaces = interfaceList;
}
// copy all attributes from the interface to the target class
if (interfaceToAdd.Fields != null) {
foreach (FieldDefinition field in interfaceToAdd.Fields) {
FieldDefinition copy = new FieldDefinition();
this.helperClass.copyField(copy, field);
copy.ContainingTypeDefinition = addTargetClass;
// set intern factory of the copied field to the one of the class
// (without it, the generated binary file will have strange results like use only the same field)
copy.InternFactory = addTargetClass.InternFactory;
addTargetClass.Fields.Add(copy);
}
}
// copy all methods from the interface to the target class
if (interfaceToAdd.Methods != null) {
foreach (IMethodDefinition method in interfaceToAdd.Methods) {
// search through all methods in the target class
// to see if this method was already added
bool foundMethod = false;
foreach (IMethodDefinition tempMethod in addTargetClass.Methods) {
// skip constructors
if (tempMethod.IsConstructor) {
continue;
}
// check if the number of parameters are the same
if (tempMethod.ParameterCount == method.ParameterCount) {
// check if the parameters have the same type in the same order
bool parameterCorrect = true;
for (int i = 0; i < method.ParameterCount; i++) {
if (method.Parameters.ElementAt(i).Type != tempMethod.Parameters.ElementAt(i).Type) {
parameterCorrect = false;
break;
}
}
// check if the return type is the same
bool returnTypeCorrect = false;
if (method.Type.Equals(tempMethod.Type)) {
returnTypeCorrect = true;
}
// check if both methods are static
// (c# compiler does not allow static + non-static function with
// same signature in same class, but CIL does)
bool bothStatic = false;
if (method.IsStatic == tempMethod.IsStatic) {
bothStatic = true;
}
// if the parameters and return type are correct => check the name
if (parameterCorrect && returnTypeCorrect && bothStatic) {
if (method.Name.Equals(tempMethod.Name)) {
// if name is the same => method already added
foundMethod = true;
break;
}
}
}
}
// skip if method was already added
if (foundMethod) {
this.logger.writeLine("Method \"" + method.Name.ToString() + "\" already exists");
continue;
}
this.logger.writeLine("Add method: " + method.Name.ToString());
// copy method
MethodDefinition copy = new MethodDefinition();
this.helperClass.copyMethod(copy, method);
copy.ContainingTypeDefinition = addTargetClass;
// generate random dead code for newly created method
ILGenerator ilGenerator = new ILGenerator(host, method);
foreach (IOperation tempOperation in CodeGenerator.generateDeadCode(true)) {
ilGenerator.Emit(tempOperation.OperationCode, tempOperation.Value);
}
IMethodBody newBody = new ILGeneratorMethodBody(ilGenerator, true, 8, method, Enumerable<ILocalDefinition>.Empty, Enumerable<ITypeDefinition>.Empty);
copy.Body = newBody;
// set intern factory of the copied method to the one of the class
// (without it, the generated binary file will have strange results like call always the same method)
copy.InternFactory = addTargetClass.InternFactory;
// set method to not abstract
copy.IsAbstract = false;
// set method to not external
copy.IsExternal = false;
// set intern factory of the copied method to the one of the class
// (without it, the generating of the binary file will have strange results)
copy.InternFactory = addTargetClass.InternFactory;
// add method to the class
addTargetClass.Methods.Add(copy);
}
}
}
static void Main(string[] args)
{
String inputFile;
String targetFile;
String targetNamespace;
String targetClass;
String targetMethod;
int depth;
int dimension;
int numberValidPaths;
int duplicateBasicBlockWeight;
int duplicateBasicBlockCorrectionValue;
int stateChangeWeight;
int stateChangeCorrectionValue;
int insertOpaquePredicateWeight;
int seed;
// Add debugging code into the obfuscated method (dump obfuscation graphs and so on)
bool graphTransformerDebug = false;
// Should the obfuscated code contain information to trace the control flow?
bool basicBlockTrace = false;
// When debugging is active, should the whole obfuscation graph be dumped or only the vpaths in it?
bool graphOnlyDumpVPaths = true;
// The number of random interfaces that are added to the program
int numberRandomInterfaces = 100;
if (args.Length != 14)
{
System.Console.WriteLine("Needed parameters: <inputBinary> <outputBinary> <namespace> <class> <method> <depth> <dimension> <numberValidPaths> <duplicateBasicBlockWeight> <duplicateBasicBlockCorrectionValue> <stateChangeWeight> <stateChangeCorrectionValue> <insertOpaquePredicateWeight> <seed>");
return;
}
else
{
inputFile = args[0];
targetFile = args[1];
targetNamespace = args[2];
targetClass = args[3];
targetMethod = args[4];
depth = Convert.ToInt32(args[5]);
dimension = Convert.ToInt32(args[6]);
numberValidPaths = Convert.ToInt32(args[7]);
duplicateBasicBlockWeight = Convert.ToInt32(args[8]);
duplicateBasicBlockCorrectionValue = Convert.ToInt32(args[9]);
stateChangeWeight = Convert.ToInt32(args[10]);
stateChangeCorrectionValue = Convert.ToInt32(args[11]);
insertOpaquePredicateWeight = Convert.ToInt32(args[12]);
seed = Convert.ToInt32(args[13]);
}
String logDir = Path.GetDirectoryName(targetFile);
Log.Log logger = new Log.Log(logDir, "probfuscation_logfile.txt");
System.Console.WriteLine("Obfuscating: " + inputFile);
logger.writeLine("Obfuscating: " + inputFile);
System.Console.WriteLine("Output file: " + targetFile);
logger.writeLine("Output file: " + targetFile);
System.Console.WriteLine("Target namespace: " + targetNamespace);
logger.writeLine("Target namespace: " + targetNamespace);
System.Console.WriteLine("Target class: " + targetClass);
logger.writeLine("Target class: " + targetClass);
System.Console.WriteLine("Target method: " + targetMethod);
logger.writeLine("Target method: " + targetMethod);
System.Console.WriteLine("Depth: " + depth);
logger.writeLine("Depth: " + depth);
System.Console.WriteLine("Dimension: " + dimension);
logger.writeLine("Dimension: " + dimension);
System.Console.WriteLine("Number of vpaths: " + numberValidPaths);
logger.writeLine("Number of vpaths: " + numberValidPaths);
System.Console.WriteLine("Basic Block duplication weight: " + duplicateBasicBlockWeight);
logger.writeLine("Basic Block duplication weight: " + duplicateBasicBlockWeight);
System.Console.WriteLine("Basic Block duplication correction value: " + duplicateBasicBlockCorrectionValue);
logger.writeLine("Basic Block duplication correction value: " + duplicateBasicBlockCorrectionValue);
System.Console.WriteLine("State change weight: " + stateChangeWeight);
logger.writeLine("State change weight: " + stateChangeWeight);
System.Console.WriteLine("State change correction value: " + stateChangeCorrectionValue);
logger.writeLine("State change correction value: " + stateChangeCorrectionValue);
System.Console.WriteLine("Opaque predicate weight: " + insertOpaquePredicateWeight);
logger.writeLine("Opaque predicate weight: " + insertOpaquePredicateWeight);
System.Console.WriteLine("Seed: " + seed);
logger.writeLine("Seed: " + seed);
// Seed PRNG for interfaces
PRNGRandomInterfaces = new Random(seed);
using (var host = new PeReader.DefaultHost()) {
IModule /*?*/ module = host.LoadUnitFrom(inputFile) as IModule;
if (module == null || module == Dummy.Module || module == Dummy.Assembly)
{
Console.WriteLine(inputFile + " is not a PE file containing a CLR module or assembly.");
return;
}
module = new MetadataDeepCopier(host).Copy(module);
if (module as Assembly == null)
{
logger.writeLine("File does not have CIL assembly");
return;
}
// create analyzer object object
CfgBuilder analyze = new Cfg.CfgBuilder(module, host, logger);
PdbReader /*?*/ pdbReader = null;
string pdbFile = Path.ChangeExtension(module.Location, "pdb");
if (File.Exists(pdbFile))
{
using (var pdbStream = File.OpenRead(pdbFile)) {
pdbReader = new PdbReader(pdbStream, host);
}
}
else
{
logger.writeLine("Could not load the PDB file for '" + module.Name.Value + "' . Proceeding anyway.");
}
using (pdbReader) {
Microsoft.Cci.ILGenerator.LocalScopeProvider localScopeProvider = null;
if (pdbReader != null)
{
localScopeProvider = new ILGenerator.LocalScopeProvider(pdbReader);
}
// search the namespace the interface should be added to
IUnitNamespace foundNamespace = null;
foreach (var tempMember in module.UnitNamespaceRoot.Members)
{
if ((tempMember as IUnitNamespace) == null)
{
continue;
}
IUnitNamespace tempNamespace = (tempMember as IUnitNamespace);
if (tempNamespace.ToString() == targetNamespace)
{
foundNamespace = tempNamespace;
break;
}
}
if (foundNamespace == null)
{
throw new ArgumentException("Not able to find target namespace.");
}
// add created interface (and implemented methods) to all classes
bool classFound = false;
foreach (var tempClass in module.GetAllTypes())
{
if ((tempClass as NamespaceTypeDefinition) == null ||
tempClass.IsAbstract)
{
continue;
}
NamespaceTypeDefinition foundClass = (tempClass as NamespaceTypeDefinition);
if (foundClass.ContainingUnitNamespace.ToString() == "")
{
continue;
}
if (foundClass.ToString() != targetNamespace + "." + targetClass)
{
continue;
}
classFound = true;
Random prng = new Random();
GraphTransformer graphTransformer = new GraphTransformer(module, host, logger, prng, foundNamespace, foundClass, depth, dimension, graphTransformerDebug);
graphTransformer.duplicateBasicBlockWeight = duplicateBasicBlockWeight;
graphTransformer.duplicateBasicBlockCorrectionValue = duplicateBasicBlockCorrectionValue;
graphTransformer.stateChangeWeight = stateChangeWeight;
graphTransformer.stateChangeCorrectionValue = stateChangeCorrectionValue;
graphTransformer.insertOpaquePredicateWeight = insertOpaquePredicateWeight;
graphTransformer.trace = basicBlockTrace;
graphTransformer.graphOnlyDumpVPaths = graphOnlyDumpVPaths;
graphTransformer.debuggingDumpLocation = logDir;
// Add 100 random interfaces to the namespace
Helper testHelper = new Helper(module, host, logger);
List <NamespaceTypeDefinition> randomInterfaces = new List <NamespaceTypeDefinition>();
for (int i = 0; i < numberRandomInterfaces; i++)
{
String randName = randomString(20);
NamespaceTypeDefinition temp = testHelper.createNewInterface(randName, foundNamespace);
randomInterfaces.Add(temp);
}
InterfaceTransformer interfaceTransformer = new InterfaceTransformer(module, host, logger);
foreach (var classToAdd in module.GetAllTypes())
{
if ((classToAdd as NamespaceTypeDefinition) == null ||
classToAdd.IsAbstract ||
classToAdd.IsInterface ||
classToAdd.IsEnum ||
classToAdd.IsDelegate ||
classToAdd.IsGeneric ||
classToAdd.IsStruct)
{
continue;
}
if (((NamespaceTypeDefinition)classToAdd).ContainingUnitNamespace.ToString() == "")
{
continue;
}
/*
* // Use this code if you want to add standard interfaces to the target class
* interfaceTransformer.addStdInterfacesGivenByFile(@"e:\code\dotnet_standard_interfaces.txt");
*
* // add std interfaces to class
* if (foundClass != (classToAdd as NamespaceTypeDefinition)) {
* foreach (ITypeDefinition temp in interfaceTransformer.getInterfacesList()) {
* interfaceTransformer.addInterface((classToAdd as NamespaceTypeDefinition), temp);
* }
* }
*/
// Add random interfaces to the classes
List <NamespaceTypeDefinition> alreadyAdded = new List <NamespaceTypeDefinition>();
int max = PRNGRandomInterfaces.Next(numberRandomInterfaces);
NamespaceTypeDefinition interfaceClass = (classToAdd as NamespaceTypeDefinition);
logger.writeLine("Adding " + max + " random interfaces to class \"" + interfaceClass.ToString() + "\"");
for (int i = 0; i < max; i++)
{
NamespaceTypeDefinition randInterface = randomInterfaces.ElementAt(PRNGRandomInterfaces.Next(randomInterfaces.Count));
if (alreadyAdded.Contains(randInterface))
{
continue;
}
alreadyAdded.Add(randInterface);
logger.writeLine("Adding interface: \"" + randInterface.ToString() + "\"");
// add nodes interface to class
if (interfaceClass.Interfaces != null)
{
interfaceClass.Interfaces.Add(randInterface);
}
else
{
interfaceClass.Interfaces = new List <ITypeReference>();
interfaceClass.Interfaces.Add(randInterface);
}
}
logger.writeLine("");
// Add special interface for the obfuscation scheme to the class
// (makes sure that all needed attributes and methods are implemented)
graphTransformer.addNodeInterfaceToTargetClass((classToAdd as NamespaceTypeDefinition));
}
// Prepare obfuscation graph
graphTransformer.generateGraph(numberValidPaths);
graphTransformer.createGraphMethods();
// Search method to obfuscate
MethodDefinition methodToObfu = null;
foreach (MethodDefinition tempMethod in foundClass.Methods)
{
if (tempMethod.Name.ToString() == targetMethod)
{
methodToObfu = tempMethod;
break;
}
}
if (methodToObfu == null)
{
throw new ArgumentException("Not able to find target method.");
}
// Obfuscate target method
MethodCfg cfg = analyze.buildCfgForMethod(methodToObfu);
logger.dumpMethodCfg(cfg, "before");
graphTransformer.addObfuscationToMethod(cfg);
analyze.createMethodFromCfg(cfg);
logger.dumpMethodCfg(cfg, "after");
break;
}
if (!classFound)
{
throw new ArgumentException("Not able to find target class.");
}
/*
* This code can be used if not only one specific method should be obfuscated,
* but the whole class.
* List<ClassCfg> classCfgList = new List<ClassCfg>();
* foreach (var tempClass in module.GetAllTypes()) {
* if ((tempClass as NamespaceTypeDefinition) == null
|| tempClass.IsAbstract) {
|| continue;
|| }
||
|| // create basic blocks
|| NamespaceTypeDefinition foundClass = (tempClass as NamespaceTypeDefinition);
||
|| logger.writeLine("Create CFG for class \"" + foundClass.Name.ToString() + "\"");
|| ClassCfg temp = analyze.buildCfgForClass(foundClass);
|| classCfgList.Add(temp);
|| logger.writeLine("\n---------------------------------\n");
||}
||
||// transform each function
||NopTransformer transformator = new NopTransformer(module, host, logger);
||foreach (ClassCfg tempClassCfg in classCfgList) {
|| foreach (MethodCfg tempMethodCfg in tempClassCfg.methodCfgs) {
|| logger.writeLine("Transform method CFG of \"" + tempMethodCfg.method.ToString() + "\"");
|| transformator.addNopsToCfg(tempMethodCfg);
|| logger.writeLine("\n---------------------------------\n");
|| }
||}
||
||foreach (ClassCfg tempClassCfg in classCfgList) {
|| logger.writeLine("Create class from CFG for \"" + tempClassCfg.classObj.Name.ToString() + "\"");
|| analyze.createClassFromCfg(tempClassCfg);
|| logger.writeLine("\n---------------------------------\n");
||}
*/
using (var peStream = File.Create(targetFile)) {
using (var pdbWriter = new PdbWriter(Path.ChangeExtension(targetFile, ".pdb"), pdbReader)) {
PeWriter.WritePeToStream(module, host, peStream, pdbReader, localScopeProvider, pdbWriter);
}
}
}
}
}
// this function adds the created iNode interface to the class and also implements all neded functions
public void addNodeInterfaceToTargetClass(NamespaceTypeDefinition givenClass) {
this.logger.writeLine("");
this.logger.writeLine("Add node interface \"" + this.nodeInterface.ToString() + "\" to class \"" + givenClass.ToString() + "\"");
// check if generated interface was already added to target class
if (givenClass.Interfaces != null
&& givenClass.Interfaces.Contains(this.nodeInterface)) {
this.logger.writeLine("Class \"" + givenClass.ToString() + "\" already contains node interface \"" + this.nodeInterface.ToString() + "\"");
return;
}
// add nodes interface to class
if (givenClass.Interfaces != null) {
givenClass.Interfaces.Add(this.nodeInterface);
}
else {
givenClass.Interfaces = new List<ITypeReference>();
givenClass.Interfaces.Add(this.nodeInterface);
}
// add start pointer field
FieldDefinition startPointerField = new FieldDefinition();
startPointerField.IsCompileTimeConstant = false;
startPointerField.IsNotSerialized = false;
startPointerField.IsReadOnly = false;
startPointerField.IsRuntimeSpecial = false;
startPointerField.IsSpecialName = false;
startPointerField.Type = this.nodeInterface;
startPointerField.IsStatic = false;
startPointerField.Visibility = TypeMemberVisibility.Public;
startPointerField.Name = host.NameTable.GetNameFor("startPointer");
startPointerField.InternFactory = host.InternFactory;
startPointerField.ContainingTypeDefinition = givenClass;
if (givenClass.Fields != null) {
givenClass.Fields.Add(startPointerField);
}
else {
givenClass.Fields = new List<IFieldDefinition>();
givenClass.Fields.Add(startPointerField);
}
// create getter for the startPointer variable
MethodDefinition startPointerGetMethod = this.helperClass.createNewMethod("startPointer_get", givenClass, this.nodeInterface, TypeMemberVisibility.Public, null, CallingConvention.HasThis, false, false, true); // TODO: method name
// create a body for the getter method
ILGenerator ilGenerator = new ILGenerator(host, startPointerGetMethod);
ilGenerator.Emit(OperationCode.Ldarg_0);
ilGenerator.Emit(OperationCode.Ldfld, startPointerField);
ilGenerator.Emit(OperationCode.Ret);
IMethodBody body = new ILGeneratorMethodBody(ilGenerator, true, 1, startPointerGetMethod, Enumerable<ILocalDefinition>.Empty, Enumerable<ITypeDefinition>.Empty);
startPointerGetMethod.Body = body;
// create setter for the startPointer variable
List<IParameterDefinition> parameters = new List<IParameterDefinition>();
ParameterDefinition parameter = new ParameterDefinition();
parameter.IsIn = false;
parameter.IsOptional = false;
parameter.IsOut = false;
parameter.Name = host.NameTable.GetNameFor("value");
parameter.Type = this.nodeInterface;
parameters.Add(parameter);
MethodDefinition startPointerSetMethod = this.helperClass.createNewMethod("startPointer_set", givenClass, host.PlatformType.SystemVoid, TypeMemberVisibility.Public, parameters, CallingConvention.HasThis, false, false, true); // TODO: method name
// create a body for the setter method
ilGenerator = new ILGenerator(host, startPointerSetMethod);
ilGenerator.Emit(OperationCode.Ldarg_0);
ilGenerator.Emit(OperationCode.Ldarg_1);
ilGenerator.Emit(OperationCode.Stfld, startPointerField);
ilGenerator.Emit(OperationCode.Ret);
body = new ILGeneratorMethodBody(ilGenerator, true, 1, startPointerSetMethod, Enumerable<ILocalDefinition>.Empty, Enumerable<ITypeDefinition>.Empty);
startPointerSetMethod.Body = body;
// add childNodes array field
FieldDefinition childNodesField = new FieldDefinition();
childNodesField.IsCompileTimeConstant = false;
childNodesField.IsNotSerialized = false;
childNodesField.IsReadOnly = false;
childNodesField.IsRuntimeSpecial = false;
childNodesField.IsSpecialName = false;
// create array of node interface type
VectorTypeReference nodeInterfaceArrayType = new VectorTypeReference();
nodeInterfaceArrayType.ElementType = this.nodeInterface;
nodeInterfaceArrayType.Rank = 1;
nodeInterfaceArrayType.IsFrozen = true;
nodeInterfaceArrayType.IsValueType = false;
nodeInterfaceArrayType.InternFactory = host.InternFactory;
childNodesField.Type = nodeInterfaceArrayType;
childNodesField.IsStatic = false;
childNodesField.Visibility = TypeMemberVisibility.Public;
childNodesField.Name = host.NameTable.GetNameFor("childNodes");
childNodesField.InternFactory = host.InternFactory;
childNodesField.ContainingTypeDefinition = givenClass;
givenClass.Fields.Add(childNodesField);
// create getter for the childNodes variable
parameters = new List<IParameterDefinition>();
// int parameter
parameter = new ParameterDefinition();
parameter.IsIn = false;
parameter.IsOptional = false;
parameter.IsOut = false;
parameter.Type = this.host.PlatformType.SystemInt32;
parameters.Add(parameter);
MethodDefinition childNodesGetMethod = this.helperClass.createNewMethod("childNodes_get", givenClass, this.nodeInterface, TypeMemberVisibility.Public, parameters, CallingConvention.HasThis, false, false, true); // TODO: method name
// create a body for the getter method
ilGenerator = new ILGenerator(host, childNodesGetMethod);
ilGenerator.Emit(OperationCode.Ldarg_0);
ilGenerator.Emit(OperationCode.Ldfld, childNodesField);
ilGenerator.Emit(OperationCode.Ldarg_1);
ilGenerator.Emit(OperationCode.Ldelem_Ref);
ilGenerator.Emit(OperationCode.Ret);
body = new ILGeneratorMethodBody(ilGenerator, true, 1, childNodesGetMethod, Enumerable<ILocalDefinition>.Empty, Enumerable<ITypeDefinition>.Empty);
childNodesGetMethod.Body = body;
// create setter for the childNodes variable
parameters = new List<IParameterDefinition>();
// iNode parameter
parameter = new ParameterDefinition();
parameter.IsIn = false;
parameter.IsOptional = false;
parameter.IsOut = false;
parameter.Type = this.nodeInterface;
parameters.Add(parameter);
// int parameter
parameter = new ParameterDefinition();
parameter.IsIn = false;
parameter.IsOptional = false;
parameter.IsOut = false;
parameter.Type = this.host.PlatformType.SystemInt32;
parameters.Add(parameter);
MethodDefinition childNodesSetMethod = this.helperClass.createNewMethod("childNodes_set", givenClass, host.PlatformType.SystemVoid, TypeMemberVisibility.Public, parameters, CallingConvention.HasThis, false, false, true); // TODO: method name
// create a body for the setter method
ilGenerator = new ILGenerator(host, childNodesSetMethod);
ilGenerator.Emit(OperationCode.Ldarg_0);
ilGenerator.Emit(OperationCode.Ldfld, childNodesField);
ilGenerator.Emit(OperationCode.Ldarg_2);
ilGenerator.Emit(OperationCode.Ldarg_1);
ilGenerator.Emit(OperationCode.Stelem_Ref);
ilGenerator.Emit(OperationCode.Ret);
body = new ILGeneratorMethodBody(ilGenerator, true, 1, childNodesSetMethod, Enumerable<ILocalDefinition>.Empty, Enumerable<ITypeDefinition>.Empty);
childNodesSetMethod.Body = body;
// add current node field
FieldDefinition currentNodeField = new FieldDefinition();
currentNodeField.IsCompileTimeConstant = false;
currentNodeField.IsNotSerialized = false;
currentNodeField.IsReadOnly = false;
currentNodeField.IsRuntimeSpecial = false;
currentNodeField.IsSpecialName = false;
currentNodeField.Type = this.nodeInterface;
currentNodeField.IsStatic = false;
currentNodeField.Visibility = TypeMemberVisibility.Public;
currentNodeField.Name = host.NameTable.GetNameFor("currentNode");
currentNodeField.InternFactory = host.InternFactory;
currentNodeField.ContainingTypeDefinition = givenClass;
givenClass.Fields.Add(currentNodeField);
// create getter for the currentNode variable
MethodDefinition currentNodeGetMethod = this.helperClass.createNewMethod("currentNode_get", givenClass, this.nodeInterface, TypeMemberVisibility.Public, null, CallingConvention.HasThis, false, false, true); // TODO: method name
// create a body for the getter method
ilGenerator = new ILGenerator(host, currentNodeGetMethod);
ilGenerator.Emit(OperationCode.Ldarg_0);
ilGenerator.Emit(OperationCode.Ldfld, currentNodeField);
ilGenerator.Emit(OperationCode.Ret);
body = new ILGeneratorMethodBody(ilGenerator, true, 1, currentNodeGetMethod, Enumerable<ILocalDefinition>.Empty, Enumerable<ITypeDefinition>.Empty);
currentNodeGetMethod.Body = body;
// create setter for the currentNode variable
parameters = new List<IParameterDefinition>();
parameter = new ParameterDefinition();
parameter.IsIn = false;
parameter.IsOptional = false;
parameter.IsOut = false;
parameter.Name = host.NameTable.GetNameFor("value");
parameter.Type = this.nodeInterface;
parameters.Add(parameter);
MethodDefinition currentNodeSetMethod = this.helperClass.createNewMethod("currentNode_set", givenClass, host.PlatformType.SystemVoid, TypeMemberVisibility.Public, parameters, CallingConvention.HasThis, false, false, true); // TODO: method name
// create a body for the setter method
ilGenerator = new ILGenerator(host, currentNodeSetMethod);
ilGenerator.Emit(OperationCode.Ldarg_0);
ilGenerator.Emit(OperationCode.Ldarg_1);
ilGenerator.Emit(OperationCode.Stfld, currentNodeField);
ilGenerator.Emit(OperationCode.Ret);
body = new ILGeneratorMethodBody(ilGenerator, true, 1, currentNodeSetMethod, Enumerable<ILocalDefinition>.Empty, Enumerable<ITypeDefinition>.Empty);
currentNodeSetMethod.Body = body;
// check if debugging is activated
// => add graph debugging attributes and methods
MethodDefinition objectIdGetMethod = null;
FieldDefinition objectIdField = null;
if (this.debugging) {
this.logger.writeLine("Debugging activated: Adding field for unique object id and getter method");
// add objectId field
objectIdField = new FieldDefinition();
objectIdField.IsCompileTimeConstant = false;
objectIdField.IsNotSerialized = false;
objectIdField.IsReadOnly = false;
objectIdField.IsRuntimeSpecial = false;
objectIdField.IsSpecialName = false;
objectIdField.Type = this.host.PlatformType.SystemString;
objectIdField.IsStatic = false;
objectIdField.Name = host.NameTable.GetNameFor("DEBUG_objectId");
objectIdField.Visibility = TypeMemberVisibility.Public;
objectIdField.InternFactory = host.InternFactory;
objectIdField.ContainingTypeDefinition = givenClass;
givenClass.Fields.Add(objectIdField);
// create getter for the objectId variable
objectIdGetMethod = this.helperClass.createNewMethod("DEBUG_objectId_get", givenClass, this.host.PlatformType.SystemString, TypeMemberVisibility.Public, null, CallingConvention.HasThis, false, false, true); // TODO: method name
// create a body for the getter method
ilGenerator = new ILGenerator(host, objectIdGetMethod);
ilGenerator.Emit(OperationCode.Ldarg_0);
ilGenerator.Emit(OperationCode.Ldfld, objectIdField);
ilGenerator.Emit(OperationCode.Ret);
body = new ILGeneratorMethodBody(ilGenerator, true, 1, objectIdGetMethod, Enumerable<ILocalDefinition>.Empty, Enumerable<ITypeDefinition>.Empty);
objectIdGetMethod.Body = body;
}
// add .ctor(iNode) to target class
parameters = new List<IParameterDefinition>();
parameter = new ParameterDefinition();
parameter.IsIn = false;
parameter.IsOptional = false;
parameter.IsOut = false;
parameter.Type = this.nodeInterface;
parameters.Add(parameter);
MethodDefinition nodeConstructor = this.helperClass.createNewMethod(".ctor", givenClass, host.PlatformType.SystemVoid, TypeMemberVisibility.Public, parameters, CallingConvention.HasThis, false, false, false);
nodeConstructor.IsSpecialName = true;
nodeConstructor.IsHiddenBySignature = true;
nodeConstructor.IsRuntimeSpecial = true;
// generate node constructor body
ilGenerator = new ILGenerator(host, currentNodeSetMethod);
// create local variable list
List<ILocalDefinition> localVariables = new List<ILocalDefinition>();
// call system.object constructor
ilGenerator.Emit(OperationCode.Ldarg_0);
ilGenerator.Emit(OperationCode.Call, this.helperClass.objectCtor);
// initialize childNodes array
ilGenerator.Emit(OperationCode.Ldarg_0);
ilGenerator.Emit(OperationCode.Ldc_I4, this.graphDimension);
ilGenerator.Emit(OperationCode.Newarr, nodeInterfaceArrayType);
ilGenerator.Emit(OperationCode.Stfld, childNodesField);
// check if debugging is activated
// => add code to constructor that generates a unique id for this object
if (this.debugging) {
this.logger.writeLine("Debugging activated: Adding code to generate unique id to node constructor");
// create local integer variable needed for debugging code
LocalDefinition intLocal = new LocalDefinition();
intLocal.IsReference = false;
intLocal.IsPinned = false;
intLocal.IsModified = false;
intLocal.Type = this.host.PlatformType.SystemInt32;
intLocal.MethodDefinition = nodeConstructor;
localVariables.Add(intLocal);
// use the hash code of this instance as unique object id
ilGenerator.Emit(OperationCode.Ldarg_0);
ilGenerator.Emit(OperationCode.Ldarg_0);
ilGenerator.Emit(OperationCode.Callvirt, this.helperClass.objectGetHashCode);
ilGenerator.Emit(OperationCode.Stloc, intLocal);
// cast random integer to string and store in object id
ilGenerator.Emit(OperationCode.Ldloca, intLocal);
ilGenerator.Emit(OperationCode.Call, this.helperClass.int32ToString);
ilGenerator.Emit(OperationCode.Stfld, objectIdField);
}
ilGenerator.Emit(OperationCode.Ret);
body = new ILGeneratorMethodBody(ilGenerator, true, 8, nodeConstructor, localVariables, Enumerable<ITypeDefinition>.Empty);
nodeConstructor.Body = body;
// add class to the list of possible nodes for the graph
PossibleNode tempStruct = new PossibleNode();
tempStruct.nodeConstructor = nodeConstructor;
tempStruct.givenClass = givenClass;
// for each interface the class implements add it to the according list
foreach (ITypeReference interfaceRef in givenClass.Interfaces) {
this.logger.writeLine("Add class \"" + givenClass.ToString() + "\" to graph interface list \"" + interfaceRef.ToString() + "\"");
// check if a list with this interface already exists
// => if it does just add current class to list
if (this.graphInterfaces.ContainsKey(interfaceRef)) {
List<PossibleNode> tempList = (List<PossibleNode>)this.graphInterfaces[interfaceRef];
tempList.Add(tempStruct);
}
// if not => add new list for this interface
else {
List<PossibleNode> tempList = new List<PossibleNode>();
tempList.Add(tempStruct);
this.graphInterfaces.Add(interfaceRef, tempList);
}
}
this.logger.writeLine("");
}
static void Main(string[] args)
{
//String inputFile = @"c:\Users\typ\Documents\Visual Studio 2013\Projects\vererbung\vererbung\bin\Debug\vererbung.exe";
String inputFile = @"e:\dile_v0_2_12_x86\Dile.exe";
globalLog = new Log(@"e:\merge_logfile.txt");
System.Console.WriteLine(inputFile);
/*
* if (args == null || args.Length == 0)
* {
* Console.WriteLine("Usage: ILMutator <assembly> [<outputPath>]");
* return;
* }
*/
using (var host = new PeReader.DefaultHost()) {
//IModule/*?*/ module = host.LoadUnitFrom(args[0]) as IModule;
IModule /*?*/ module = host.LoadUnitFrom(inputFile) as IModule;
if (module == null || module == Dummy.Module || module == Dummy.Assembly)
{
//Console.WriteLine(args[0] + " is not a PE file containing a CLR module or assembly.");
Console.WriteLine(inputFile + " is not a PE file containing a CLR module or assembly.");
return;
}
module = new MetadataDeepCopier(host).Copy(module);
if (module as Assembly == null)
{
globalLog.writeLine("File does not have CIL assembly");
return;
}
PdbReader /*?*/ pdbReader = null;
string pdbFile = Path.ChangeExtension(module.Location, "pdb");
if (File.Exists(pdbFile))
{
using (var pdbStream = File.OpenRead(pdbFile)) {
pdbReader = new PdbReader(pdbStream, host);
}
}
else
{
globalLog.writeLine("Could not load the PDB file for '" + module.Name.Value + "' . Proceeding anyway.");
}
using (pdbReader) {
Microsoft.Cci.ILGenerator.LocalScopeProvider localScopeProvider = null;
if (pdbReader != null)
{
localScopeProvider = new ILGenerator.LocalScopeProvider(pdbReader);
}
// AB HIER DER INTERESSANTE PART ZUM MERGEN, DAVOR NUR INIT CRAP
// search for class in namespace
NamespaceTypeDefinition foundClass = null;
foreach (var asdf in module.GetAllTypes())
{
//if (asdf.ToString() == "vererbung.Erber") {
if (asdf.ToString() == "Dile.Disassemble.Assembly")
{
foundClass = (asdf as NamespaceTypeDefinition);
break;
}
}
if (foundClass == null)
{
globalLog.writeLine("Class not found!");
return;
}
// merge class
globalLog.writeLine("Merge class \"" + foundClass.ToString() + "\" with all ancestors");
mergeClassWithAllAncestors(foundClass, host);
string newName;
if (args.Length == 2)
{
newName = args[1];
//newName = @"e:\dile_v0_2_12_x86\dile_classes.exe";
newName = @"e:\test.exe";
}
else
{
var loc = module.Location;
var path = Path.GetDirectoryName(loc) ?? "";
var fileName = Path.GetFileNameWithoutExtension(loc);
var ext = Path.GetExtension(loc);
newName = Path.Combine(path, fileName + "1" + ext);
//newName = @"e:\dile_v0_2_12_x86\dile_classes.exe";
newName = @"e:\test.exe";
}
using (var peStream = File.Create(newName)) {
using (var pdbWriter = new PdbWriter(Path.ChangeExtension(newName, ".pdb"), pdbReader)) {
PeWriter.WritePeToStream(module, host, peStream, pdbReader, localScopeProvider, pdbWriter);
}
}
}
}
}
static void mergeClassWithAncestor(NamespaceTypeDefinition mergeTargetClass, PeReader.DefaultHost host)
{
// get class from which was inherited
ITypeDefinition ancestorClass = null;
INamedEntity ancestorClassName = null;
if (mergeTargetClass.BaseClasses.Count == 1)
{
// TODO
// entferne wenn Methode umgeschrieben
/*
* // ignore inheritance from System.Object
* if (mergeTargetClass.BaseClasses[0].ToString() != "System.Object") {
* ancestorClass = (mergeTargetClass.BaseClasses[0] as NamespaceTypeDefinition);
* }
* // return if ancestor class equals System.Object
* else {
* return;
* }
*/
// check base class is of type NamespaceTypeDefinition
if (mergeTargetClass.BaseClasses.ElementAt(0) as NamespaceTypeDefinition != null)
{
ancestorClass = (mergeTargetClass.BaseClasses.ElementAt(0) as ITypeDefinition);
ancestorClassName = (mergeTargetClass.BaseClasses.ElementAt(0) as INamedEntity);
}
// ignore inheritance from System.Object
else if (mergeTargetClass.BaseClasses[0].ToString() == "System.Object")
{
return;
}
// check for needed values in base class and its resolved value (for example when base class of type NamespaceTypeReference)
else if ((mergeTargetClass.BaseClasses.ElementAt(0).ResolvedType as ITypeDefinition != null) &&
(mergeTargetClass.BaseClasses.ElementAt(0) as INamedEntity != null))
{
// TODO
// weiss nicht ob es Sinn macht externe Klassen wie z.B. system.ValueType
// in die aktuelle Klasse rein zu mergen => denn Trick mit methoden auf Virtual stellen
// damit JIT Compiler unsere Methoden aufruft klappt nicht in dem Fall (da wir die Methoden von System.ValueType nicht umschreiben koennen)
//ancestorClass = (mergeTargetClass.BaseClasses[0].ResolvedType as ITypeDefinition);
//ancestorClassName = (mergeTargetClass.BaseClasses[0].ResolvedType as INamedEntity);
return;
}
else
{
throw new ArgumentException("Do not know how to handle base class.");
}
}
else
{
throw new ArgumentException("Do not know how to handle multiple inheritance.");
}
// copy all attributes from the ancestor class to the current class
if (ancestorClass.Fields != null)
{
globalLog.writeLine("Copying fileds");
foreach (FieldDefinition field in ancestorClass.Fields)
{
FieldDefinition copy = new FieldDefinition();
globalLog.writeLine("Copying field: " + field.Name.ToString());
copyField(copy, field);
copy.ContainingTypeDefinition = mergeTargetClass;
// set intern factory of the copied field to the one of the class
// (without it, the generated binary file will have strange results like use only the same field)
copy.InternFactory = mergeTargetClass.InternFactory;
mergeTargetClass.Fields.Add(copy);
}
globalLog.writeLine("");
}
// list of all constructors of the ancestor class
List <MethodDefinition> copiedAncestorConstructors = new List <MethodDefinition>();
// copy methods from the ancestor class to the current class
if (ancestorClass.Methods != null)
{
globalLog.writeLine("Copying methods");
foreach (IMethodDefinition method in ancestorClass.Methods)
{
globalLog.writeLine("Copying method: " + method.Name.ToString());
// check if the method is a constructor
if (method.IsConstructor)
{
MethodDefinition copiedAncestorConstructor = new MethodDefinition();
copyMethod(copiedAncestorConstructor, method, host);
// TODO
// name muss noch geaendert werden
String tempName = "ctor_" + ancestorClassName.Name.ToString();
copiedAncestorConstructor.Name = host.NameTable.GetNameFor(tempName);
// constructor has the "SpecialName" (the name describes the functionality)
// and "RTSpecialName" (runtime should check name encoding) flag set
// runtime will raise an exception if these flags are set for a copied constructor
// which is added as a normal function
copiedAncestorConstructor.IsSpecialName = false;
copiedAncestorConstructor.IsRuntimeSpecial = false;
// TODO:
// vielleicht einfach von späterer Schleife machen lassen (sollte jetzt schon gehen, aber noch nicht getestet,
// deshalb erst ein mal drin gelassen)
// copy constructor and rewrite instructions to use attributes and functions
// inside the same class
var testIlGenerator = new ILGenerator(host, copiedAncestorConstructor);
foreach (var operation in copiedAncestorConstructor.Body.Operations)
{
switch (operation.OperationCode)
{
case OperationCode.Call:
// HIER NOCH CHECKEN OB ANDERE FUNKTIONEN INNERHALB DES ANCESTORS AUFGERUFEN WERDEN
// DIESE MUESSEN UMGELEITET WERDEN
/*
* Microsoft.Cci.MutableCodeModel.MethodDefinition blah = null;
* if (operation.Value is Microsoft.Cci.MutableCodeModel.MethodDefinition) {
* blah = (Microsoft.Cci.MutableCodeModel.MethodDefinition)(operation.Value);
* NamespaceTypeDefinition test = (NamespaceTypeDefinition)blah.ContainingTypeDefinition;
*
* if (ancestorClass.Name.Equals(test.Name)) {
* System.Console.WriteLine("Ja");
* }
*
*
* }
*/
testIlGenerator.Emit(operation.OperationCode, operation.Value);
break;
case OperationCode.Stfld:
FieldDefinition attribute = (FieldDefinition)operation.Value;
// search for the method attribute that is used in the copied constructor
// and replace it with the method attribute from the current class
FieldDefinition foundField = null;
foreach (FieldDefinition field in mergeTargetClass.Fields)
{
if (attribute.Name.Equals(field.Name) &&
attribute.Type.Equals(field.Type))
{
foundField = field;
break;
}
}
if (foundField == null)
{
System.Console.WriteLine("Attribute not found");
return;
}
testIlGenerator.Emit(operation.OperationCode, foundField);
break;
default:
testIlGenerator.Emit(operation.OperationCode, operation.Value);
break;
}
}
// create new body
List <ILocalDefinition> variableListCopy = new List <ILocalDefinition>(method.Body.LocalVariables);
List <ITypeDefinition> privateHelperTypesListCopy = new List <ITypeDefinition>(method.Body.PrivateHelperTypes);
var newBody = new ILGeneratorMethodBody(testIlGenerator, method.Body.LocalsAreZeroed, method.Body.MaxStack, copiedAncestorConstructor, variableListCopy, privateHelperTypesListCopy);
copiedAncestorConstructor.Body = newBody;
// set intern factory of the copied constructor to the one of the class
// (without it, the generated binary file will have strange results like call always the same method)
copiedAncestorConstructor.InternFactory = mergeTargetClass.InternFactory;
// add copied constructor to the class
copiedAncestorConstructor.ContainingTypeDefinition = mergeTargetClass;
copiedAncestorConstructor.Visibility = TypeMemberVisibility.Private;
mergeTargetClass.Methods.Add(copiedAncestorConstructor);
// add copied ancestor constructor to the list of copied ancestor constructors
copiedAncestorConstructors.Add(copiedAncestorConstructor);
continue;
}
else
{
// copy method
MethodDefinition copy = new MethodDefinition();
copyMethod(copy, method, host);
copy.ContainingTypeDefinition = mergeTargetClass;
// set intern factory of the copied method to the one of the class
// (without it, the generating of the binary file will have strange results)
copy.InternFactory = mergeTargetClass.InternFactory;
// add method to the class
if (mergeTargetClass.Methods == null)
{
mergeTargetClass.Methods = new List <IMethodDefinition>();
}
mergeTargetClass.Methods.Add(copy);
}
}
globalLog.writeLine("");
}
// rewrite constructors of the class to call the copied constructor instead of
// the constructor of the ancestor class
// (rewriting methods is handled later)
foreach (MethodDefinition method in mergeTargetClass.Methods)
{
// check if method is a constructor
if (method.IsConstructor)
{
var testIlGenerator = new ILGenerator(host, method);
foreach (var operation in method.Body.Operations)
{
switch (operation.OperationCode)
{
// only call instructions that call a constructor have to be redirected
case OperationCode.Call:
MethodDefinition calledMethod = (MethodDefinition)operation.Value;
if (calledMethod.IsConstructor)
{
// TODO hier treten noch Probleme auf, wenn System.Object ist nicht der oberste Ancestor
// sondern z.B. System.ValueType
// check if the called constructor is not the constructor of System.Object
// and if the constructor that is called is not a constructor of THIS class
NamespaceTypeDefinition calledMethodNamespace = (NamespaceTypeDefinition)calledMethod.ContainingTypeDefinition;
if (calledMethodNamespace.ToString() != "System.Object" &&
!calledMethodNamespace.Name.Equals(mergeTargetClass.Name))
{
// search for the copied constructor that has to be called
// (it is searched by parameter types because they always are named the same ".ctor")
MethodDefinition copiedConstructorToCall = null;
foreach (MethodDefinition copiedAncestorConstructor in copiedAncestorConstructors)
{
// check if the count of the parameters of the called constructor and the copied constructor are the same
if (copiedAncestorConstructor.ParameterCount == calledMethod.ParameterCount)
{
// check if the parameters have the same type in the same order
bool found = true;
for (int i = 0; i < calledMethod.ParameterCount; i++)
{
if (calledMethod.Parameters[i].Type != copiedAncestorConstructor.Parameters[i].Type)
{
found = false;
break;
}
}
if (found)
{
copiedConstructorToCall = copiedAncestorConstructor;
break;
}
}
}
if (copiedConstructorToCall == null)
{
throw new ArgumentException("No copied constructor with the same parameter types in the same order.");
}
// call copied constructor instead of constructor of the ancestor
testIlGenerator.Emit(operation.OperationCode, copiedConstructorToCall);
}
// just emit if the called constructor is the constructor of System.Object
else
{
testIlGenerator.Emit(operation.OperationCode, operation.Value);
}
}
// just emit operation if no constructor is called
// (rewriting methods is handled later)
else
{
testIlGenerator.Emit(operation.OperationCode, operation.Value);
}
break;
// just emit operation if none of the above cases match
default:
testIlGenerator.Emit(operation.OperationCode, operation.Value);
break;
}
}
// create new body
List <ILocalDefinition> variableListCopy = new List <ILocalDefinition>(method.Body.LocalVariables);
List <ITypeDefinition> privateHelperTypesListCopy = new List <ITypeDefinition>(method.Body.PrivateHelperTypes);
var newBody = new ILGeneratorMethodBody(testIlGenerator, method.Body.LocalsAreZeroed, method.Body.MaxStack, method, variableListCopy, privateHelperTypesListCopy);
method.Body = newBody;
}
}
// rewrite all methods to use local attributes/methods instead of the ones of the ancestor
foreach (MethodDefinition method in mergeTargetClass.Methods)
{
var testIlGenerator = new ILGenerator(host, method);
foreach (var operation in method.Body.Operations)
{
switch (operation.OperationCode)
{
case OperationCode.Stfld:
case OperationCode.Ldfld:
// get namespace of attribute
FieldDefinition attribute = (FieldDefinition)operation.Value;
INamedTypeDefinition attributeNamespace = (INamedTypeDefinition)attribute.ContainingTypeDefinition;
// check if namespace of attribute equals the namespace of THIS class
// => just emit operation
if (mergeTargetClass.Name.Equals(attributeNamespace.Name))
{
testIlGenerator.Emit(operation.OperationCode, operation.Value);
continue;
}
// try the namespace of all ancestors of this class to see if it was copied
else
{
// flag that indicates if the operation was emitted during the search loop
bool operationEmitted = false;
// search through all ancestors to find the namespace of the used attribute
NamespaceTypeDefinition tempAncestorClass = mergeTargetClass;
while (true)
{
// get class from which was inherited
if (tempAncestorClass.BaseClasses.Count == 1)
{
// ignore inheritance from System.Object
if (tempAncestorClass.BaseClasses[0].ToString() != "System.Object")
{
tempAncestorClass = (tempAncestorClass.BaseClasses[0] as NamespaceTypeDefinition);
}
// return if ancestor class equals System.Object
else
{
break;
}
}
else
{
throw new ArgumentException("Do not know how to handle multiple inheritance.");
}
// check namespace of used attribute is equal to namespace of ancestor
// => change target of operation to THIS class
if (tempAncestorClass.Name.Equals(attributeNamespace.Name))
{
// search for the method attribute that is used in the copied method
// and replace it with the method attribute from the current class
FieldDefinition foundField = null;
foreach (FieldDefinition field in mergeTargetClass.Fields)
{
if (attribute.Name.Equals(field.Name) &&
attribute.Type.Equals(field.Type))
{
foundField = field;
break;
}
}
if (foundField == null)
{
throw new ArgumentException("Attribute not found.");
}
// emit operation and set flag that it was emitted
operationEmitted = true;
testIlGenerator.Emit(operation.OperationCode, foundField);
break;
}
}
// if operation was not emitted yet => emit it
if (operationEmitted == false)
{
testIlGenerator.Emit(operation.OperationCode, operation.Value);
}
}
break;
case OperationCode.Call:
// just emit if value is of type method reference
if (operation.Value is Microsoft.Cci.MutableCodeModel.MethodReference)
{
testIlGenerator.Emit(operation.OperationCode, operation.Value);
continue;
}
// get namespace of called method
MethodDefinition calledMethod = (MethodDefinition)operation.Value;
NamespaceTypeDefinition calledMethodNamespace = (NamespaceTypeDefinition)calledMethod.ContainingTypeDefinition;
// check if namespace of called method equals the namespace of THIS class
// => just emit operation
if (mergeTargetClass.Name.Equals(calledMethodNamespace.Name))
{
testIlGenerator.Emit(operation.OperationCode, operation.Value);
continue;
}
// try the namespace of all ancestors of this class to see if it was copied
else
{
// flag that indicates if the operation was emitted during the search loop
bool operationEmitted = false;
// search through all ancestors to find the namespace of the called method
NamespaceTypeDefinition tempAncestorClass = mergeTargetClass;
while (true)
{
// get class from which was inherited
if (tempAncestorClass.BaseClasses.Count == 1)
{
// ignore inheritance from System.Object
if (tempAncestorClass.BaseClasses[0].ToString() != "System.Object")
{
tempAncestorClass = (tempAncestorClass.BaseClasses[0] as NamespaceTypeDefinition);
}
// return if ancestor class equals System.Object
else
{
break;
}
}
else
{
throw new ArgumentException("Do not know how to handle multiple inheritance.");
}
// check namespace of called method is equal to namespace of ancestor, if the same
// => find copied method in THIS class
// => change target of operation to method in THIS class
if (tempAncestorClass.Name.Equals(calledMethodNamespace.Name))
{
// search through all methods in THISS class and search for the copied one
MethodDefinition foundMethod = null;
foreach (MethodDefinition newMethod in mergeTargetClass.Methods)
{
// skip constructors (can not be called from the ancestor)
if (newMethod.IsConstructor)
{
continue;
}
if (newMethod.ParameterCount == calledMethod.ParameterCount)
{
// check if the parameters have the same type in the same order
bool parameterCorrect = true;
for (int i = 0; i < calledMethod.ParameterCount; i++)
{
if (calledMethod.Parameters[i].Type != newMethod.Parameters[i].Type)
{
parameterCorrect = false;
break;
}
}
// if the parameters are correct => check the name
if (parameterCorrect)
{
if (calledMethod.Name.Equals(newMethod.Name))
{
// if name is the same => found method to call
foundMethod = newMethod;
break;
}
}
}
}
// check if the method we want to call was found
if (foundMethod == null)
{
throw new ArgumentException("Did not find a method to call.");
}
// emit operation and set flag that it was emitted
operationEmitted = true;
testIlGenerator.Emit(operation.OperationCode, foundMethod);
break;
}
}
// if operation was not emitted yet => emit it
if (operationEmitted == false)
{
testIlGenerator.Emit(operation.OperationCode, operation.Value);
}
}
break;
// just emit operation if none of the above cases match
default:
testIlGenerator.Emit(operation.OperationCode, operation.Value);
break;
}
}
// create new body
List <ILocalDefinition> variableListCopy = new List <ILocalDefinition>(method.Body.LocalVariables);
List <ITypeDefinition> privateHelperTypesListCopy = new List <ITypeDefinition>(method.Body.PrivateHelperTypes);
var newBody = new ILGeneratorMethodBody(testIlGenerator, method.Body.LocalsAreZeroed, method.Body.MaxStack, method, variableListCopy, privateHelperTypesListCopy);
method.Body = newBody;
}
}
