本文整理汇总了C#中Mono.Cecil.Cil.Instruction.ChangeToNop方法的典型用法代码示例。如果您正苦于以下问题：C# Instruction.ChangeToNop方法的具体用法？C# Instruction.ChangeToNop怎么用？C# Instruction.ChangeToNop使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Mono.Cecil.Cil.Instruction的用法示例。
在下文中一共展示了Instruction.ChangeToNop方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: InlineCall
//.........这里部分代码省略.........
break;
case Code.Ldarga:
{
var index = targetMethod.Parameters.IndexOf((ParameterDefinition)instr.Operand);
ni.Operand = (index >= 0) ? paramVariables[index] : thisVariable;
ni.OpCode = OpCodes.Ldloca;
}
break;
case Code.Starg:
{
var index = targetMethod.Parameters.IndexOf((ParameterDefinition)instr.Operand);
ni.Operand = (index >= 0) ? paramVariables[index] : thisVariable;
ni.OpCode = OpCodes.Stloc;
}
break;
}
}
// Update branch targets
for (var i = 0; i < seq.Length; i++)
{
var instr = seq[i];
var oldi = source.Instructions[i];
if (instr.OpCode.OperandType == OperandType.InlineSwitch)
{
var olds = (Instruction[])oldi.Operand;
var targets = new Instruction[olds.Length];
for (int j = 0; j < targets.Length; j++)
{
targets[j] = GetClone(seq, source.Instructions, olds[j]);
}
instr.Operand = targets;
}
else if (instr.OpCode.OperandType == OperandType.ShortInlineBrTarget ||
instr.OpCode.OperandType == OperandType.InlineBrTarget)
{
instr.Operand = GetClone(seq, source.Instructions, (Instruction)oldi.Operand);
}
}
// Clone exception handlers
if (source.HasExceptionHandlers)
{
body.ComputeOffsets();
CloneInstructions(seq, source.Instructions, body.ExceptionHandlers, source.ExceptionHandlers);
}
// Replace ret instructions
var end = seq.Emit(OpCodes.Nop);
var retInstructions = seq.Where(x => x.OpCode.Code == Code.Ret).ToList();
foreach (var ins in retInstructions)
{
ins.OpCode = OpCodes.Br;
ins.Operand = end;
}
// cast return type of a generic method. TODO: better might be to
// correctly resolve calls to generic instances as well (above)
if (targetMethod.ReturnType.IsGenericParameter)
{
var methodRef = (MethodReference)instruction.Operand;
TypeReference returnType = null;
var gp = (GenericParameter)methodRef.ReturnType;
if (gp.Type == GenericParameterType.Type)
{
var gi = methodRef.DeclaringType as IGenericInstance;
if (gi != null && gi.HasGenericArguments)
returnType = gi.GenericArguments[gp.Position];
}
else if (gp.Type == GenericParameterType.Method)
{
var gi = methodRef as IGenericInstance;
if (gi != null && gi.HasGenericArguments)
returnType = gi.GenericArguments[gp.Position];
}
if (returnType != null)
{
if (!returnType.IsPrimitive)
{
seq.Emit(OpCodes.Castclass, returnType);
}
// todo: handle primitive types. unbox them? are structs correctly handled? enums?
}
}
// Insert cloned instructions
prefixSeq.InsertTo(0, seq);
seq.InsertToAfter(instruction, body);
// Change replaced instruction to nop
instruction.ChangeToNop();
// Update offsets
body.ComputeOffsets();
}示例2: InlineNewObjCall
//.........这里部分代码省略.........
}
break;
}
// Convert parameter opcodes
switch (instr.OpCode.Code)
{
case Mono.Cecil.Cil.Code.Ldarg:
{
var index = ctor.Parameters.IndexOf((ParameterDefinition) instr.Operand);
ni.Operand = (index >= 0) ? paramVariables[index] : thisVariable;
ni.OpCode = OpCodes.Ldloc;
}
break;
case Mono.Cecil.Cil.Code.Ldarga:
{
var index = ctor.Parameters.IndexOf((ParameterDefinition) instr.Operand);
ni.Operand = (index >= 0) ? paramVariables[index] : thisVariable;
ni.OpCode = OpCodes.Ldloca;
}
break;
case Mono.Cecil.Cil.Code.Starg:
{
var index = ctor.Parameters.IndexOf((ParameterDefinition) instr.Operand);
ni.Operand = (index >= 0) ? paramVariables[index] : thisVariable;
ni.OpCode = OpCodes.Stloc;
}
break;
}
}
// Update branch targets
for (var i = 0; i < seq.Length; i++)
{
var instr = seq[i];
var oldi = source.Instructions[i];
if (instr.OpCode.OperandType == OperandType.InlineSwitch)
{
var olds = (Instruction[]) oldi.Operand;
var targets = new Instruction[olds.Length];
for (int j = 0; j < targets.Length; j++)
{
targets[j] = GetClone(seq, source.Instructions, olds[j]);
}
instr.Operand = targets;
}
else if (instr.OpCode.OperandType == OperandType.ShortInlineBrTarget ||
instr.OpCode.OperandType == OperandType.InlineBrTarget)
{
instr.Operand = GetClone(seq, source.Instructions, (Instruction) oldi.Operand);
}
}
// Clone exception handlers
if (source.HasExceptionHandlers)
{
CloneInstructions(seq, source.Instructions, body.ExceptionHandlers, source.ExceptionHandlers);
}
// Find call to "this" ctor
var callToCtors = seq.Where(x => IsCallToThisCtor(x, ctor)).ToList();
if (callToCtors.Count == 0)
throw new CompilerException(string.Format("No call to another this ctor found in {0}", ctor));
if (callToCtors.Count > 1)
throw new CompilerException(string.Format("Multiple calls to another this ctor found in {0}", ctor));
var callToCtor = callToCtors[0];
// Change "ld this" to nop
var args = callToCtor.GetCallArguments(seq, true);
args[0].ChangeToNop(); // Replace ldarg.0
// Replace call to this ctor with newobj
var callSeq = new ILSequence();
callSeq.Emit(OpCodes.Newobj, (MethodReference) callToCtor.Operand);
callSeq.Emit(OpCodes.Stloc, thisVariable); // Save new object
callToCtor.ChangeToNop();
callSeq.InsertToBefore(callToCtor, seq);
// Replace ret instructions
var end = seq.Emit(OpCodes.Ldloc, thisVariable);
var retInstructions = seq.Where(x => x.OpCode.Code == Mono.Cecil.Cil.Code.Ret).ToList();
foreach (var ins in retInstructions)
{
ins.OpCode = OpCodes.Br;
ins.Operand = end;
}
// Insert cloned instructions
prefixSeq.InsertTo(0, seq);
seq.InsertToAfter(instruction, body);
// Change replaced instruction to nop
instruction.ChangeToNop();
// Update offsets
body.ComputeOffsets();
}示例3: InlineCall
//.........这里部分代码省略.........
}
// Now clone instructions
var seq = new ILSequence();
foreach (var instr in source.Instructions)
{
var ni = new Instruction(instr.OpCode, instr.Operand);
seq.Append(ni);
ni.Offset = instr.Offset;
// Convert variable opcodes
switch (instr.OpCode.OperandType)
{
case OperandType.InlineVar:
case OperandType.ShortInlineVar:
{
var index = source.Variables.IndexOf((VariableDefinition)instr.Operand);
ni.Operand = variables[index];
}
break;
}
// Convert parameter opcodes
switch (instr.OpCode.Code)
{
case Code.Ldarg:
{
var index = targetMethod.Parameters.IndexOf((ParameterDefinition)instr.Operand);
ni.Operand = (index >= 0) ? paramVariables[index] : thisVariable;
ni.OpCode = OpCodes.Ldloc;
}
break;
case Code.Ldarga:
{
var index = targetMethod.Parameters.IndexOf((ParameterDefinition)instr.Operand);
ni.Operand = (index >= 0) ? paramVariables[index] : thisVariable;
ni.OpCode = OpCodes.Ldloca;
}
break;
case Code.Starg:
{
var index = targetMethod.Parameters.IndexOf((ParameterDefinition)instr.Operand);
ni.Operand = (index >= 0) ? paramVariables[index] : thisVariable;
ni.OpCode = OpCodes.Stloc;
}
break;
}
}
// Update branch targets
for (var i = 0; i < seq.Length; i++)
{
var instr = seq[i];
var oldi = source.Instructions[i];
if (instr.OpCode.OperandType == OperandType.InlineSwitch)
{
var olds = (Instruction[])oldi.Operand;
var targets = new Instruction[olds.Length];
for (int j = 0; j < targets.Length; j++)
{
targets[j] = GetClone(seq, source.Instructions, olds[j]);
}
instr.Operand = targets;
}
else if (instr.OpCode.OperandType == OperandType.ShortInlineBrTarget ||
instr.OpCode.OperandType == OperandType.InlineBrTarget)
{
instr.Operand = GetClone(seq, source.Instructions, (Instruction)oldi.Operand);
}
}
// Clone exception handlers
if (source.HasExceptionHandlers)
{
body.ComputeOffsets();
CloneInstructions(seq, source.Instructions, body.ExceptionHandlers, source.ExceptionHandlers);
}
// Replace ret instructions
var end = seq.Emit(OpCodes.Nop);
var retInstructions = seq.Where(x => x.OpCode.Code == Code.Ret).ToList();
foreach (var ins in retInstructions)
{
ins.OpCode = OpCodes.Br;
ins.Operand = end;
}
// Insert cloned instructions
prefixSeq.InsertTo(0, seq);
seq.InsertToAfter(instruction, body);
// Change replaced instruction to nop
instruction.ChangeToNop();
// Update offsets
body.ComputeOffsets();
}