/// <summary>
/// Validates an actual exception handling clause (the cloned version) against an expected one (its source).
/// </summary>
/// <param name="actualLocalVariable">Local variable to validate.</param>
/// <param name="expectedLocalVariable">Local variable with expected info.</param>
private static void ValidateLocalVariable(LocalVariableInfo actualLocalVariable, LocalVariableInfo expectedLocalVariable)
{
Assert.That(actualLocalVariable == null, Is.EqualTo(expectedLocalVariable == null));
if (actualLocalVariable == null) { return; }
Assert.That(actualLocalVariable.IsPinned, Is.EqualTo(expectedLocalVariable.IsPinned));
Assert.That(actualLocalVariable.LocalIndex, Is.EqualTo(expectedLocalVariable.LocalIndex));
}
public static uint GetStackCountForLocal(MethodInfo aMethod, LocalVariableInfo aField) {
var xSize = SizeOfType(aField.LocalType);
var xResult = xSize / 4;
if (xSize % 4 != 0) {
xResult++;
}
return xResult;
}
public MSIL_MethodResolver(System.Reflection.MethodBase Method) : base(Method.DeclaringType.Module)
{
System.Reflection.MethodBody body = Method.GetMethodBody();
if (Method.GetMethodBody() != null)
{
foreach (System.Reflection.LocalVariableInfo localsBody in body.LocalVariables)
{
System.Reflection.LocalVariableInfo _WAR_local = localsBody;
_locals.Add(_WAR_local.LocalIndex, _WAR_local);
}
}
}
void PushAsBoolean(CompilerState state, LocalVariableInfo local)
{
if (state == null) throw new Exception();
if (local == null) throw new Exception();
Label l1 = state.Generator.DefineLabel();
Label l2 = state.Generator.DefineLabel();
LoadLocalVariable(state, local);
if (local.LocalType == typeof(Int32))
{
state.Generator.Emit(OpCodes.Brfalse, l1);
}
else if (local.LocalType == typeof(Single))
{
state.Generator.Emit(OpCodes.Ldc_R4, 0);
state.Generator.Emit(OpCodes.Beq, l1);
}
else
{
throw new Exception();
}
state.Generator.Emit(OpCodes.Ldc_I4_1);
state.Generator.Emit(OpCodes.Br, l2);
state.Generator.MarkLabel(l1);
state.Generator.Emit(OpCodes.Ldc_I4_0);
state.Generator.MarkLabel(l2);
}
void StoreLocalVariable(CompilerState state, LocalVariableInfo local)
{
if (state == null) throw new Exception();
if (local == null) throw new Exception();
switch (local.LocalIndex)
{
case 0:
state.Generator.Emit(OpCodes.Stloc_0);
break;
case 1:
state.Generator.Emit(OpCodes.Stloc_1);
break;
case 2:
state.Generator.Emit(OpCodes.Stloc_2);
break;
case 3:
state.Generator.Emit(OpCodes.Stloc_3);
break;
default:
state.Generator.Emit(OpCodes.Stloc, local.LocalIndex);
break;
}
}
void CheckIfZero(CompilerState state, LocalVariableInfo local)
{
if (state == null) throw new Exception();
if (local == null) throw new Exception();
if (local.LocalType == typeof(Int32))
{
LoadLocalVariable(state, local);
state.Generator.Emit(OpCodes.Ldc_I4_0);
state.Generator.Emit(OpCodes.Beq, state.ErrorLabel);
}
if (local.LocalType == typeof(Single))
{
LoadLocalVariable(state, local);
state.Generator.Emit(OpCodes.Ldc_R4, 0.0f);
state.Generator.Emit(OpCodes.Beq, state.ErrorLabel);
}
}
LocalVariableInfo EmitArithmeticOperator(CompilerState state, OpCode msilcode, LocalVariableInfo lhs, LocalVariableInfo rhs)
{
if (state == null) throw new Exception();
if (lhs == null) throw new Exception();
if (rhs == null) throw new Exception();
if (msilcode == OpCodes.Div) CheckIfZero(state, rhs);
LocalVariableInfo result;
if (lhs.LocalType == typeof(Int32) && rhs.LocalType == typeof(Int32))
{
result = state.Generator.DeclareLocal(typeof(Int32));
LoadLocalVariable(state, lhs);
LoadLocalVariable(state, rhs);
}
else
{
result = state.Generator.DeclareLocal(typeof(Single));
LoadLocalVariable(state, lhs);
state.Generator.Emit(OpCodes.Conv_R4);
LoadLocalVariable(state, rhs);
state.Generator.Emit(OpCodes.Conv_R4);
}
state.Generator.Emit(msilcode);
StoreLocalVariable(state, result);
return result;
}
LocalVariableInfo EmitComparsionOperator(CompilerState state, Operator @operator, LocalVariableInfo lhs, LocalVariableInfo rhs)
{
if (state == null) throw new Exception();
if (lhs == null) throw new Exception();
if (rhs == null) throw new Exception();
LocalVariableInfo result = state.Generator.DeclareLocal(typeof(Int32));
if (lhs.LocalType == typeof(Int32) && rhs.LocalType == typeof(Int32))
{
LoadLocalVariable(state, lhs);
LoadLocalVariable(state, rhs);
}
else
{
LoadLocalVariable(state, lhs);
state.Generator.Emit(OpCodes.Conv_R4);
LoadLocalVariable(state, rhs);
state.Generator.Emit(OpCodes.Conv_R4);
}
switch (@operator)
{
case Operator.Equals:
state.Generator.Emit(OpCodes.Ceq);
StoreLocalVariable(state, result);
break;
case Operator.NotEquals:
state.Generator.Emit(OpCodes.Ceq);
state.Generator.Emit(OpCodes.Ldc_I4_0);
state.Generator.Emit(OpCodes.Ceq);
StoreLocalVariable(state, result);
break;
case Operator.Lesser:
state.Generator.Emit(OpCodes.Clt);
StoreLocalVariable(state, result);
break;
case Operator.LesserEquals:
state.Generator.Emit(OpCodes.Cgt);
state.Generator.Emit(OpCodes.Ldc_I4_0);
state.Generator.Emit(OpCodes.Ceq);
StoreLocalVariable(state, result);
break;
case Operator.Greater:
state.Generator.Emit(OpCodes.Cgt);
StoreLocalVariable(state, result);
break;
case Operator.GreaterEquals:
state.Generator.Emit(OpCodes.Clt);
state.Generator.Emit(OpCodes.Ldc_I4_0);
state.Generator.Emit(OpCodes.Ceq);
StoreLocalVariable(state, result);
break;
default:
throw new Exception();
}
return result;
}
LocalVariableInfo EmitLogicalOperator(CompilerState state, Operator @operator, LocalVariableInfo lhs, LocalVariableInfo rhs)
{
if (state == null) throw new Exception();
if (lhs == null) throw new Exception();
if (rhs == null) throw new Exception();
LocalVariableInfo result = state.Generator.DeclareLocal(typeof(Int32));
PushAsBoolean(state, lhs);
PushAsBoolean(state, rhs);
switch (@operator)
{
case Operator.LogicalAnd:
state.Generator.Emit(OpCodes.And);
StoreLocalVariable(state, result);
break;
case Operator.LogicalOr:
state.Generator.Emit(OpCodes.Or);
StoreLocalVariable(state, result);
break;
case Operator.LogicalXor:
state.Generator.Emit(OpCodes.Xor);
StoreLocalVariable(state, result);
break;
default:
throw new Exception();
}
return result;
}
public static void StoreLocal(LocalVariableInfo local, ILGenerator body)
{
EmitSpecific((short) local.LocalIndex, storeLocal, OpCodes.Stloc, body);
}
public static void LoadLocal(LocalVariableInfo local, ILGenerator body)
{
EmitSpecific((short) local.LocalIndex, loadLocal, OpCodes.Ldloc, body);
}
public static ILGenerator ldloca(this ILGenerator il, LocalVariableInfo variable)
{
if (variable.LocalIndex > byte.MaxValue)
il.Emit(OpCodes.Ldloca, variable.LocalIndex);
else
il.Emit(OpCodes.Ldloca_S, (byte) variable.LocalIndex);
return il;
}
public static ILGenerator ldloc(this ILGenerator il, LocalVariableInfo variable)
{
if (variable.LocalIndex < 4)
switch (variable.LocalIndex)
{
case (0):
il.Emit(OpCodes.Ldloc_0);
return il;
case (1):
il.Emit(OpCodes.Ldloc_1);
return il;
case (2):
il.Emit(OpCodes.Ldloc_2);
return il;
case (3):
il.Emit(OpCodes.Ldloc_3);
return il;
default:
throw new ArgumentOutOfRangeException("variable", "Variable index should be positive");
}
if (variable.LocalIndex > byte.MaxValue)
il.Emit(OpCodes.Ldloc, variable.LocalIndex);
else
il.Emit(OpCodes.Ldloc_S, (byte) variable.LocalIndex);
return il;
}
public static void emit(System.Reflection.Emit.OpCode OpCode, object Data, System.Reflection.Emit.ILGenerator Generator)
{
if (OpCode.FlowControl == System.Reflection.Emit.FlowControl.Branch || OpCode.FlowControl == System.Reflection.Emit.FlowControl.Cond_Branch)
{
if (Data is System.Reflection.Emit.Label)
{
Generator.Emit(OpCode, ((System.Reflection.Emit.Label)Data));
}
else
{
throw new Exception("Invalid data. The target of a branch has to substituted by a label before beeing emitted");
}
}
else if (OpCode.FlowControl == System.Reflection.Emit.FlowControl.Call)
{
Generator.EmitCall(OpCode, Data as System.Reflection.MethodInfo, null);
}
else
{
if (Data is System.Reflection.LocalVariableInfo)
{
System.Reflection.LocalVariableInfo info = Data as System.Reflection.LocalVariableInfo;
if (OpCode == System.Reflection.Emit.OpCodes.Ldloc ||
OpCode == System.Reflection.Emit.OpCodes.Ldloc_S ||
OpCode == System.Reflection.Emit.OpCodes.Ldloc_0 ||
OpCode == System.Reflection.Emit.OpCodes.Ldloc_1 ||
OpCode == System.Reflection.Emit.OpCodes.Ldloc_2 ||
OpCode == System.Reflection.Emit.OpCodes.Ldloc_3)
{
switch (info.LocalIndex)
{
case 0: Generator.Emit(System.Reflection.Emit.OpCodes.Ldloc_0); break;
case 1: Generator.Emit(System.Reflection.Emit.OpCodes.Ldloc_1); break;
case 2: Generator.Emit(System.Reflection.Emit.OpCodes.Ldloc_2); break;
case 3: Generator.Emit(System.Reflection.Emit.OpCodes.Ldloc_3); break;
default:
if (info.LocalIndex < 256)
{
Generator.Emit(System.Reflection.Emit.OpCodes.Ldloc_S, (byte)info.LocalIndex);
}
else
{
Generator.Emit(System.Reflection.Emit.OpCodes.Ldloc, info.LocalIndex);
}
break;
}
}
else if (OpCode == System.Reflection.Emit.OpCodes.Stloc ||
OpCode == System.Reflection.Emit.OpCodes.Stloc_S ||
OpCode == System.Reflection.Emit.OpCodes.Stloc_0 ||
OpCode == System.Reflection.Emit.OpCodes.Stloc_1 ||
OpCode == System.Reflection.Emit.OpCodes.Stloc_2 ||
OpCode == System.Reflection.Emit.OpCodes.Stloc_3)
{
switch (info.LocalIndex)
{
case 0: Generator.Emit(System.Reflection.Emit.OpCodes.Stloc_0); break;
case 1: Generator.Emit(System.Reflection.Emit.OpCodes.Stloc_1); break;
case 2: Generator.Emit(System.Reflection.Emit.OpCodes.Stloc_2); break;
case 3: Generator.Emit(System.Reflection.Emit.OpCodes.Stloc_3); break;
default:
if (info.LocalIndex < 256)
{
Generator.Emit(System.Reflection.Emit.OpCodes.Stloc_S, (byte)info.LocalIndex);
}
else
{
Generator.Emit(System.Reflection.Emit.OpCodes.Stloc, info.LocalIndex);
}
break;
}
}
else
{
throw new InvalidProgramException("Invalid OpCode and Data combinaison: " + OpCode.ToString() + " " + Data.ToString());
}
}
else if (OpCode == System.Reflection.Emit.OpCodes.Ldarg_0 ||
OpCode == System.Reflection.Emit.OpCodes.Ldarg_1 ||
OpCode == System.Reflection.Emit.OpCodes.Ldarg_2 ||
OpCode == System.Reflection.Emit.OpCodes.Ldarg_3 ||
OpCode == System.Reflection.Emit.OpCodes.Ldarg_S)
{
int argIndx = (int)Data;
switch (argIndx)
{
case 0: Generator.Emit(System.Reflection.Emit.OpCodes.Ldarg_0); break;
case 1: Generator.Emit(System.Reflection.Emit.OpCodes.Ldarg_1); break;
case 2: Generator.Emit(System.Reflection.Emit.OpCodes.Ldarg_2); break;
case 3: Generator.Emit(System.Reflection.Emit.OpCodes.Ldarg_3); break;
default:
if (argIndx < 256)
{
Generator.Emit(System.Reflection.Emit.OpCodes.Ldarg_S, (byte)argIndx);
}
else
{
Generator.Emit(System.Reflection.Emit.OpCodes.Ldarg, argIndx);
}
break;
}
}
else
{
if (Data == null)
{
Generator.Emit(OpCode);
}
else if (Data is int)
{
Generator.Emit(OpCode, (int)Data);
}
else if (Data is byte)
{
Generator.Emit(OpCode, (byte)Data);
}
else if (Data is double)
{
Generator.Emit(OpCode, (double)Data);
}
else if (Data is float)
{
Generator.Emit(OpCode, (float)Data);
}
else if (Data is FieldInfo)
{
Generator.Emit(OpCode, (FieldInfo)Data);
}
else if (Data is long)
{
Generator.Emit(OpCode, (long)Data);
}
else if (Data is Type)
{
Generator.Emit(OpCode, (Type)Data);
}
else if (Data is ConstructorInfo)
{
Generator.Emit(OpCode, (ConstructorInfo)Data);
}
else
{
throw new InvalidProgramException("Invalid OpCode and Data combinaison: " + OpCode.ToString() + " " + Data.ToString());
}
}
}
}
/// <summary>
/// Implements the special treatment of a particular local variable.
/// </summary>
/// <param name="lvi">information on local variable</param>
/// <param name="decomp">decompiler instance</param>
public virtual void ImplementDeclaration(LocalVariableInfo lvi, IDecompiler decomp)
{
throw new NotSupportedException("Declaration as local variable is not allowed");
}