static void GenerateDynamicMethod(MethodBase original, List <MethodInfo> prefixes, List <MethodInfo> postfixes, List <MethodInfo> transpilers, ILGenerator il, int idx) { var originalVariables = DynamicTools.DeclareLocalVariables(original, il); var privateVars = new Dictionary <string, LocalBuilder>(); LocalBuilder resultVariable = null; if (idx > 0) { resultVariable = DynamicTools.DeclareLocalVariable(il, AccessTools.GetReturnedType(original)); privateVars[RESULT_VAR] = resultVariable; } prefixes.ForEach(prefix => { prefix.GetParameters() .Where(patchParam => patchParam.Name == STATE_VAR) .Do(patchParam => { var privateStateVariable = DynamicTools.DeclareLocalVariable(il, patchParam.ParameterType); privateVars[prefix.DeclaringType.FullName] = privateStateVariable; }); }); var afterOriginal1 = il.DefineLabel(); var afterOriginal2 = il.DefineLabel(); var canHaveJump = AddPrefixes(il, original, prefixes, privateVars, afterOriginal2); var copier = new MethodCopier(original, il, originalVariables); foreach (var transpiler in transpilers) { copier.AddTranspiler(transpiler); } copier.Emit(afterOriginal1); Emitter.MarkLabel(il, afterOriginal1); if (resultVariable != null) { Emitter.Emit(il, OpCodes.Stloc, resultVariable); } if (canHaveJump) { Emitter.MarkLabel(il, afterOriginal2); } AddPostfixes(il, original, postfixes, privateVars); if (resultVariable != null) { Emitter.Emit(il, OpCodes.Ldloc, resultVariable); } Emitter.Emit(il, OpCodes.Ret); }
private static void ConvertArgument(ILGenerator il, Type paramType, ref LocalBuilder byRefLocal) { if (paramType.IsValueType) return; if (paramType.IsByRef) { Type elementType = paramType.GetElementType(); if (paramType.GetElementType() == typeof(string)) { // byRefLocal = Il2CppStringToManaged(*ptr); // return ref byRefLocal; byRefLocal = il.DeclareLocal(elementType); Emitter.Emit(il, OpCodes.Ldind_I); Emitter.Emit(il, OpCodes.Call, UnhollowerSupport.Il2CppStringToManagedMethod); Emitter.Emit(il, OpCodes.Stloc, byRefLocal); Emitter.Emit(il, OpCodes.Ldloca, byRefLocal); } else if (UnhollowerSupport.IsGeneratedAssemblyType(elementType)) { // byRefLocal = *ptr == 0 ? null : new SomeType(*ptr); // return ref byRefLocal; Label ptrNonZero = il.DefineLabel(); Label done = il.DefineLabel(); byRefLocal = il.DeclareLocal(elementType); Emitter.Emit(il, OpCodes.Ldind_I); Emitter.Emit(il, OpCodes.Dup); Emitter.Emit(il, OpCodes.Brtrue_S, ptrNonZero); Emitter.Emit(il, OpCodes.Pop); Emitter.Emit(il, OpCodes.Br_S, done); Emitter.MarkLabel(il, ptrNonZero); Emitter.Emit(il, OpCodes.Newobj, Il2CppConstuctor(elementType)); Emitter.Emit(il, OpCodes.Stloc, byRefLocal); Emitter.MarkLabel(il, done); Emitter.Emit(il, OpCodes.Ldloca, byRefLocal); } } else if (paramType == typeof(string)) { // return Il2CppStringToManaged(ptr); Emitter.Emit(il, OpCodes.Call, UnhollowerSupport.Il2CppStringToManagedMethod); } else if (UnhollowerSupport.IsGeneratedAssemblyType(paramType)) { // return ptr == 0 ? null : new SomeType(ptr); Label ptrNonZero = il.DefineLabel(); Label done = il.DefineLabel(); Emitter.Emit(il, OpCodes.Dup); Emitter.Emit(il, OpCodes.Brtrue_S, ptrNonZero); Emitter.Emit(il, OpCodes.Pop); Emitter.Emit(il, OpCodes.Ldnull); Emitter.Emit(il, OpCodes.Br_S, done); Emitter.MarkLabel(il, ptrNonZero); Emitter.Emit(il, OpCodes.Newobj, Il2CppConstuctor(paramType)); Emitter.MarkLabel(il, done); } }
public static DynamicMethod CreatePatchedMethod(MethodBase original, MethodInfo postfix) { var patch = DynamicTools.CreateDynamicMethod(original, "_Patch"); var il = patch.GetILGenerator(); var originalVariables = DynamicTools.DeclareLocalVariables(original, il); var privateVars = new Dictionary <string, LocalBuilder>(); LocalBuilder resultVariable = null; if (postfix != null) { resultVariable = DynamicTools.DeclareLocalVariable(il, AccessTools.GetReturnedType(original)); privateVars[RESULT_VAR] = resultVariable; } var afterOriginal1 = il.DefineLabel(); var copier = new MethodCopier(original, patch, originalVariables); copier.Emit(afterOriginal1); Emitter.MarkLabel(il, afterOriginal1); if (resultVariable != null) { Emitter.Emit(il, OpCodes.Stloc, resultVariable); } AddPostfix(il, original, postfix, privateVars); if (resultVariable != null) { Emitter.Emit(il, OpCodes.Ldloc, resultVariable); } Emitter.Emit(il, OpCodes.Ret); DynamicTools.PrepareDynamicMethod(patch); return(patch); }
public static DynamicMethod CreatePatchedMethod(MethodBase original, string harmonyInstanceID, List <MethodInfo> prefixes, List <MethodInfo> postfixes, List <MethodInfo> transpilers) { try { if (HarmonyInstance.DEBUG) { FileLog.LogBuffered("### Patch " + original.DeclaringType + ", " + original); } bool isIl2Cpp = original.DeclaringType.IsSubclassOf(typeof(Il2CppObjectBase)); if (isIl2Cpp && transpilers.Count > 0) { throw new NotSupportedException("IL2CPP patches cannot use transpilers (got " + transpilers.Count + ")"); } var idx = prefixes.Count() + postfixes.Count(); var patch = DynamicTools.CreateDynamicMethod(original, "_Patch" + idx, isIl2Cpp); if (patch == null) { return(null); } var il = patch.GetILGenerator(); // for debugging AssemblyBuilder assemblyBuilder = null; TypeBuilder typeBuilder = null; if (DEBUG_METHOD_GENERATION_BY_DLL_CREATION) { il = DynamicTools.CreateSaveableMethod(original, "_Patch" + idx, out assemblyBuilder, out typeBuilder); } var originalVariables = DynamicTools.DeclareLocalVariables(original, il); var privateVars = new Dictionary <string, LocalBuilder>(); LocalBuilder resultVariable = null; if (idx > 0) { resultVariable = DynamicTools.DeclareLocalVariable(il, AccessTools.GetReturnedType(original)); privateVars[RESULT_VAR] = resultVariable; } prefixes.ForEach(prefix => { prefix.GetParameters() .Where(patchParam => patchParam.Name == STATE_VAR) .Do(patchParam => { var privateStateVariable = DynamicTools.DeclareLocalVariable(il, patchParam.ParameterType); privateVars[prefix.DeclaringType.FullName] = privateStateVariable; }); }); var skipOriginalLabel = il.DefineLabel(); var canHaveJump = AddPrefixes(il, original, prefixes, privateVars, skipOriginalLabel, isIl2Cpp); var copier = new MethodCopier(original, il, originalVariables); foreach (var transpiler in transpilers) { copier.AddTranspiler(transpiler); } var endLabels = new List <Label>(); var endBlocks = new List <ExceptionBlock>(); copier.Finalize(endLabels, endBlocks); foreach (var label in endLabels) { Emitter.MarkLabel(il, label); } foreach (var block in endBlocks) { Emitter.MarkBlockAfter(il, block); } if (resultVariable != null) { Emitter.Emit(il, OpCodes.Stloc, resultVariable); } if (canHaveJump) { Emitter.MarkLabel(il, skipOriginalLabel); } AddPostfixes(il, original, postfixes, privateVars, false, isIl2Cpp); if (resultVariable != null) { Emitter.Emit(il, OpCodes.Ldloc, resultVariable); } AddPostfixes(il, original, postfixes, privateVars, true, isIl2Cpp); Emitter.Emit(il, OpCodes.Ret); if (HarmonyInstance.DEBUG) { FileLog.LogBuffered("DONE"); FileLog.LogBuffered(""); FileLog.FlushBuffer(); } // for debugging if (DEBUG_METHOD_GENERATION_BY_DLL_CREATION) { DynamicTools.SaveMethod(assemblyBuilder, typeBuilder); return(null); } DynamicTools.PrepareDynamicMethod(patch); return(patch); } catch (Exception ex) { throw new Exception("Exception from HarmonyInstance \"" + harmonyInstanceID + "\"", ex); } finally { if (HarmonyInstance.DEBUG) { FileLog.FlushBuffer(); } } }
internal void FinalizeILCodes(List <MethodInfo> transpilers, List <Label> endLabels, List <ExceptionBlock> endBlocks) { if (generator == null) { return; } // pass1 - define labels and add them to instructions that are target of a jump // foreach (var ilInstruction in ilInstructions) { switch (ilInstruction.opcode.OperandType) { case OperandType.InlineSwitch: { var targets = ilInstruction.operand as ILInstruction[]; if (targets != null) { var labels = new List <Label>(); foreach (var target in targets) { var label = generator.DefineLabel(); target.labels.Add(label); labels.Add(label); } ilInstruction.argument = labels.ToArray(); } break; } case OperandType.ShortInlineBrTarget: case OperandType.InlineBrTarget: { var target = ilInstruction.operand as ILInstruction; if (target != null) { var label = generator.DefineLabel(); target.labels.Add(label); ilInstruction.argument = label; } break; } } } // pass2 - filter through all processors // var codeTranspiler = new CodeTranspiler(ilInstructions); transpilers.Do(transpiler => codeTranspiler.Add(transpiler)); var codeInstructions = codeTranspiler.GetResult(generator, method); if (HarmonyInstance.DEBUG) { Emitter.LogComment(generator, "start original"); } // pass3 - log out all new local variables // var savedLog = FileLog.GetBuffer(true); Emitter.AllLocalVariables(generator).Do(local => Emitter.LogLocalVariable(generator, local)); FileLog.LogBuffered(savedLog); // pass4 - remove RET if it appears at the end // while (true) { var lastInstruction = codeInstructions.LastOrDefault(); if (lastInstruction == null || lastInstruction.opcode != OpCodes.Ret) { break; } // remember any existing labels endLabels.AddRange(lastInstruction.labels); codeInstructions.RemoveAt(codeInstructions.Count - 1); } // pass5 - mark labels and exceptions and emit codes // var idx = 0; codeInstructions.Do(codeInstruction => { // mark all labels codeInstruction.labels.Do(label => Emitter.MarkLabel(generator, label)); // start all exception blocks // TODO: we ignore the resulting label because we have no way to use it // codeInstruction.blocks.Do(block => { Label?label; Emitter.MarkBlockBefore(generator, block, out label); }); var code = codeInstruction.opcode; var operand = codeInstruction.operand; // replace RET with a jump to the end (outside this code) if (code == OpCodes.Ret) { var endLabel = generator.DefineLabel(); code = OpCodes.Br; operand = endLabel; endLabels.Add(endLabel); } // replace short jumps with long ones (can be optimized but requires byte counting, not instruction counting) if (shortJumps.TryGetValue(code, out var longJump)) { code = longJump; } var emitCode = true; //if (code == OpCodes.Leave || code == OpCodes.Leave_S) //{ // // skip LEAVE on EndExceptionBlock // if (codeInstruction.blocks.Any(block => block.blockType == ExceptionBlockType.EndExceptionBlock)) // emitCode = false; // // skip LEAVE on next instruction starts a new exception handler and we are already in // if (idx < instructions.Length - 1) // if (instructions[idx + 1].blocks.Any(block => block.blockType != ExceptionBlockType.EndExceptionBlock)) // emitCode = false; //} if (emitCode) { switch (code.OperandType) { case OperandType.InlineNone: Emitter.Emit(generator, code); break; case OperandType.InlineSig: // TODO the following will fail because we do not convert the token (operand) // All the decompilers can show the arguments correctly, we just need to find out how // if (operand == null) { throw new Exception("Wrong null argument: " + codeInstruction); } if ((operand is int) == false) { throw new Exception("Wrong Emit argument type " + operand.GetType() + " in " + codeInstruction); } Emitter.Emit(generator, code, (int)operand); /* * // the following will only work if we can convert the original signature token to the required arguments * // * var callingConvention = System.Runtime.InteropServices.CallingConvention.ThisCall; * var returnType = typeof(object); * var parameterTypes = new[] { typeof(object) }; * Emitter.EmitCalli(generator, code, callingConvention, returnType, parameterTypes); * * var callingConventions = System.Reflection.CallingConventions.Standard; * var optionalParameterTypes = new[] { typeof(object) }; * Emitter.EmitCalli(generator, code, callingConventions, returnType, parameterTypes, optionalParameterTypes); */ break; default: if (operand == null) { throw new Exception("Wrong null argument: " + codeInstruction); } var emitMethod = EmitMethodForType(operand.GetType()); if (emitMethod == null) { throw new Exception("Unknown Emit argument type " + operand.GetType() + " in " + codeInstruction); } if (HarmonyInstance.DEBUG) { FileLog.LogBuffered(Emitter.CodePos(generator) + code + " " + Emitter.FormatArgument(operand)); } emitMethod.Invoke(generator, new object[] { code, operand }); break; } } codeInstruction.blocks.Do(block => Emitter.MarkBlockAfter(generator, block)); idx++; }); if (HarmonyInstance.DEBUG) { Emitter.LogComment(generator, "end original"); } }
public static DynamicMethod CreatePatchedMethod(MethodBase original, List <MethodInfo> prefixes, List <MethodInfo> postfixes, List <TranspilerImpl> transpilers, PatchFlags flags) { if (HarmonyInstance.DEBUG) { FileLog.Log("PATCHING " + original.DeclaringType + " " + original); } var idx = prefixes.Count() + postfixes.Count(); var patch = DynamicTools.CreateDynamicMethod(original, "_Patch" + idx); var il = patch.GetILGenerator(); var originalVariables = DynamicTools.DeclareLocalVariables(original, il); var privateVars = new Dictionary <string, LocalBuilder>(); LocalBuilder resultVariable = null; if (idx > 0) { resultVariable = DynamicTools.DeclareLocalVariable(il, AccessTools.GetReturnedType(original)); privateVars[RESULT_VAR] = resultVariable; } prefixes.ForEach(prefix => { prefix.GetParameters() .Where(patchParam => patchParam.Name == STATE_VAR) .Do(patchParam => { var privateStateVariable = DynamicTools.DeclareLocalVariable(il, patchParam.ParameterType); privateVars[prefix.DeclaringType.FullName] = privateStateVariable; }); }); var afterOriginal1 = il.DefineLabel(); var afterOriginal2 = il.DefineLabel(); bool canHaveJump = false; if (flags.HasFlag(PatchFlags.PF_Detour) == false) { canHaveJump = AddPrefixes(il, original, prefixes, privateVars, afterOriginal2); if (flags.HasFlag(PatchFlags.PF_NoOrigin) == false) { var copier = new MethodCopier(original, patch, originalVariables); foreach (var transpiler in transpilers) { copier.AddTranspiler(transpiler); } copier.Emit(afterOriginal1); Emitter.MarkLabel(il, afterOriginal1); if (resultVariable != null) { Emitter.Emit(il, OpCodes.Stloc, resultVariable); } } } if (canHaveJump) { Emitter.MarkLabel(il, afterOriginal2); } if (AddPostfixes(il, original, postfixes, privateVars)) { if (resultVariable != null) { Emitter.Emit(il, OpCodes.Stloc, resultVariable); } } if (resultVariable != null) { Emitter.Emit(il, OpCodes.Ldloc, resultVariable); } Emitter.Emit(il, OpCodes.Ret); if (HarmonyInstance.DEBUG) { FileLog.Log("DONE"); FileLog.Log(""); } DynamicTools.PrepareDynamicMethod(patch); return(patch); }
public static DynamicMethod CreatePatchedMethod(MethodBase original, string harmonyInstanceID, List <MethodInfo> prefixes, List <MethodInfo> postfixes, List <MethodInfo> transpilers) { Memory.MarkForNoInlining(original); if (original == null) { throw new ArgumentNullException(nameof(original), "Original method is null. Did you specify it correctly?"); } try { if (HarmonyInstance.DEBUG) { FileLog.LogBuffered("### Patch " + original.DeclaringType + ", " + original); FileLog.FlushBuffer(); } var idx = prefixes.Count() + postfixes.Count(); var firstArgIsReturnBuffer = NativeThisPointer.NeedsNativeThisPointerFix(original); var returnType = AccessTools.GetReturnedType(original); var patch = DynamicTools.CreateDynamicMethod(original, "_Patch" + idx); if (patch == null) { return(null); } var il = patch.GetILGenerator(); var originalVariables = DynamicTools.DeclareLocalVariables(original, il); var privateVars = new Dictionary <string, LocalBuilder>(); LocalBuilder resultVariable = null; if (idx > 0) { resultVariable = DynamicTools.DeclareLocalVariable(il, returnType); privateVars[RESULT_VAR] = resultVariable; } prefixes.Union(postfixes).ToList().ForEach(fix => { if (privateVars.ContainsKey(fix.DeclaringType.FullName) == false) { fix.GetParameters() .Where(patchParam => patchParam.Name == STATE_VAR) .Do(patchParam => { var privateStateVariable = DynamicTools.DeclareLocalVariable(il, patchParam.ParameterType); privateVars[fix.DeclaringType.FullName] = privateStateVariable; }); } }); if (firstArgIsReturnBuffer) { Emitter.Emit(il, original.IsStatic ? OpCodes.Ldarg_0 : OpCodes.Ldarg_1); } var skipOriginalLabel = il.DefineLabel(); var canHaveJump = AddPrefixes(il, original, prefixes, privateVars, skipOriginalLabel); var copier = new MethodCopier(original, il, originalVariables); foreach (var transpiler in transpilers) { copier.AddTranspiler(transpiler); } var endLabels = new List <Label>(); var endBlocks = new List <ExceptionBlock>(); copier.Finalize(endLabels, endBlocks); foreach (var label in endLabels) { Emitter.MarkLabel(il, label); } foreach (var block in endBlocks) { Emitter.MarkBlockAfter(il, block); } if (resultVariable != null) { Emitter.Emit(il, OpCodes.Stloc, resultVariable); } if (canHaveJump) { Emitter.MarkLabel(il, skipOriginalLabel); } AddPostfixes(il, original, postfixes, privateVars, false); if (resultVariable != null) { Emitter.Emit(il, OpCodes.Ldloc, resultVariable); } AddPostfixes(il, original, postfixes, privateVars, true); if (firstArgIsReturnBuffer) { Emitter.Emit(il, OpCodes.Stobj, returnType); } Emitter.Emit(il, OpCodes.Ret); if (HarmonyInstance.DEBUG) { FileLog.LogBuffered("DONE"); FileLog.LogBuffered(""); FileLog.FlushBuffer(); } DynamicTools.PrepareDynamicMethod(patch); return(patch); } catch (Exception ex) { var exceptionString = "Exception from HarmonyInstance \"" + harmonyInstanceID + "\" patching " + original.FullDescription(); if (HarmonyInstance.DEBUG) { FileLog.Log("Exception: " + exceptionString); } throw new Exception(exceptionString, ex); } finally { if (HarmonyInstance.DEBUG) { FileLog.FlushBuffer(); } } }
public static DynamicMethod CreatePatchedMethod(MethodBase original, List <MethodInfo> prefixes, List <MethodInfo> postfixes, List <ICodeProcessor> processors) { if (MethodCopier.DEBUG_OPCODES) { FileLog.Log("PATCHING " + original.DeclaringType + " " + original); } var idx = prefixes.Count() + postfixes.Count(); var patch = DynamicTools.CreateDynamicMethod(original, "_Patch" + idx); var il = patch.GetILGenerator(); var originalVariables = DynamicTools.DeclareLocalVariables(original, il); var resultVariable = DynamicTools.DeclareLocalVariable(il, AccessTools.GetReturnedType(original)); var privateVars = new Dictionary <string, LocalBuilder>(); privateVars[RESULT_VAR] = resultVariable; prefixes.ForEach(prefix => { prefix.GetParameters() .Where(patchParam => patchParam.Name == STATE_VAR) .Do(patchParam => { var privateStateVariable = DynamicTools.DeclareLocalVariable(il, patchParam.ParameterType); privateVars[prefix.DeclaringType.FullName] = privateStateVariable; }); }); var afterOriginal1 = il.DefineLabel(); var afterOriginal2 = il.DefineLabel(); var canHaveJump = AddPrefixes(il, original, prefixes, privateVars, afterOriginal2); var copier = new MethodCopier(original, patch, originalVariables); foreach (var processor in processors) { copier.AddReplacement(processor); } copier.AddReplacement(new RetToBrAfterProcessor(afterOriginal1)); copier.Emit(); Emitter.MarkLabel(il, afterOriginal1); if (resultVariable != null) { Emitter.Emit(il, OpCodes.Stloc, resultVariable); } if (canHaveJump) { Emitter.MarkLabel(il, afterOriginal2); } AddPostfixes(il, original, postfixes, privateVars); if (resultVariable != null) { Emitter.Emit(il, OpCodes.Ldloc, resultVariable); } Emitter.Emit(il, OpCodes.Ret); if (MethodCopier.DEBUG_OPCODES) { FileLog.Log("DONE"); FileLog.Log(""); } DynamicTools.PrepareDynamicMethod(patch); return(patch); }