// use parsed IL codes and emit them to a generator
public void FinalizeILCodes(List <MethodInfo> transpilers, Label endLabel)
{
if (generator == null)
{
return;
}
// pass1 - define labels and add them to instructions that are target of a jump
ilInstructions.ForEach(ilInstruction =>
{
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)
{
labels.Add(target.GetLabel(generator));
}
ilInstruction.argument = labels.ToArray();
}
break;
}
case OperandType.ShortInlineBrTarget:
case OperandType.InlineBrTarget:
{
var target = ilInstruction.operand as ILInstruction;
if (target != null)
{
ilInstruction.argument = target.GetLabel(generator);
}
break;
}
}
});
// pass2 - filter through all processors
var codeTranspiler = new CodeTranspiler(ilInstructions);
transpilers.ForEach(transpiler => codeTranspiler.Add(transpiler));
var codeInstructions = codeTranspiler.GetResult(generator, method)
.Select(instruction =>
{
// TODO - improve the logic here. for now, we replace all short jumps
// with long jumps regardless of how far the jump is
//
new Dictionary <OpCode, OpCode>
{
{ OpCodes.Beq_S, OpCodes.Beq },
{ OpCodes.Bge_S, OpCodes.Bge },
{ OpCodes.Bge_Un_S, OpCodes.Bge_Un },
{ OpCodes.Bgt_S, OpCodes.Bgt },
{ OpCodes.Bgt_Un_S, OpCodes.Bgt_Un },
{ OpCodes.Ble_S, OpCodes.Ble },
{ OpCodes.Ble_Un_S, OpCodes.Ble_Un },
{ OpCodes.Blt_S, OpCodes.Blt },
{ OpCodes.Blt_Un_S, OpCodes.Blt_Un },
{ OpCodes.Bne_Un_S, OpCodes.Bne_Un },
{ OpCodes.Brfalse_S, OpCodes.Brfalse },
{ OpCodes.Brtrue_S, OpCodes.Brtrue },
{ OpCodes.Br_S, OpCodes.Br },
{ OpCodes.Leave_S, OpCodes.Leave }
}.Do(pair =>
{
if (instruction.opcode == pair.Key)
{
instruction.opcode = pair.Value;
}
});
if (instruction.opcode == OpCodes.Ret)
{
instruction.opcode = OpCodes.Br;
instruction.operand = endLabel;
}
return(instruction);
});
// pass3 - mark labels and emit codes
codeInstructions.Do(codeInstruction =>
{
Emitter.EmitExceptionBlock(generator, codeInstruction);
if (codeInstruction.label != null)
{
Emitter.MarkLabel(generator, codeInstruction.label.Value);
}
var code = codeInstruction.opcode;
var operand = codeInstruction.operand;
if (code.OperandType == OperandType.InlineNone)
{
Emitter.Emit(generator, code);
}
else
{
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.Log(Emitter.CodePos(generator) + code + " " + Emitter.FormatArgument(operand));
}
emitMethod.Invoke(generator, new object[] { code, operand });
}
});
}
// use parsed IL codes and emit them to a generator
//
public 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);
// pass3 - 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);
var l = codeInstructions.ToList();
l.RemoveAt(l.Count - 1);
codeInstructions = l;
}
// pass4 - mark labels and exceptions and emit codes
//
var instructions = codeInstructions.ToArray();
var idx = 0;
instructions.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);
}
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)
{
if (code.OperandType == OperandType.InlineNone)
{
Emitter.Emit(generator, code);
}
else
{
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 });
}
}
codeInstruction.blocks.Do(block => Emitter.MarkBlockAfter(generator, block));
idx++;
});
}
// use parsed IL codes and emit them to a generator
//
public 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);
// pass3 - 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);
}
// pass4 - 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++;
});
}
/// <summary>
/// Compiles a method into IL instructions.
/// </summary>
/// <param name="method">Method to compile.</param>
/// <returns>
/// List of ILInstructions.
/// </returns>
/// <remarks>
/// Utilizes harmony library.
/// </remarks>
public static List <CodeInstruction> MethodToILInstructions(MethodBase method)
{
DynamicMethod dynamicMethod = DynamicTools.CreateDynamicMethod(method, "_ILParser");
if (dynamicMethod == null)
{
return(null);
}
// Get il generato
ILGenerator il = dynamicMethod.GetILGenerator();
LocalBuilder[] existingVariables = DynamicTools.DeclareLocalVariables(method, il);
Dictionary <string, LocalBuilder> privateVars = new Dictionary <string, LocalBuilder>();
MethodBodyReader reader = new MethodBodyReader(method, il);
reader.DeclareVariables(existingVariables);
reader.ReadInstructions();
List <ILInstruction> ilInstructions = (List <ILInstruction>)FIilInstructions.GetValue(reader);
// Defines function start label
il.DefineLabel();
// Define labels
foreach (ILInstruction ilInstruction in ilInstructions)
{
switch (ilInstruction.opcode.OperandType)
{
case OperandType.InlineSwitch:
{
ILInstruction[] array = ilInstruction.operand as ILInstruction[];
if (array != null)
{
List <Label> labels = new List <Label>();
ILInstruction[] array2 = array;
foreach (ILInstruction iLInstruction2 in array2)
{
Label item = il.DefineLabel();
iLInstruction2.labels.Add(item);
labels.Add(item);
}
ilInstruction.argument = labels.ToArray();
}
break;
}
case OperandType.InlineBrTarget:
case OperandType.ShortInlineBrTarget:
{
ILInstruction iLInstruction = ilInstruction.operand as ILInstruction;
if (iLInstruction != null)
{
Label label2 = il.DefineLabel();
iLInstruction.labels.Add(label2);
ilInstruction.argument = label2;
}
break;
}
}
}
// Transpile code
CodeTranspiler codeTranspiler = new CodeTranspiler(ilInstructions);
List <CodeInstruction> result = codeTranspiler.GetResult(il, method);
// Replace debug commands with normal
foreach (CodeInstruction codeInstruction in result)
{
OpCode opCode = codeInstruction.opcode;
codeInstruction.opcode = ReplaceShortJumps(opCode);
}
return(result);
}