private int ExecuteInstruction(Instruction instruction)
{
var wasExactInstructionProcessed = true;
if (_currentCount >= _maxExecuteCount)
return -1;
#region big switch
switch (instruction.OpCode.Code)
{
case Code.Nop:
break;
case Code.Break:
break;
case Code.Ldarg_0:
_stack.Push(new StackEntry(instruction, false));
break;
case Code.Ldarg_1:
_stack.Push(new StackEntry(instruction, false));
break;
case Code.Ldarg_2:
_stack.Push(new StackEntry(instruction, false));
break;
case Code.Ldarg_3:
_stack.Push(new StackEntry(instruction, false));
break;
case Code.Ldloc_0:
_stack.Push(LocalToStackEntry(instruction, _locals[0]));
break;
case Code.Ldloc_1:
_stack.Push(LocalToStackEntry(instruction, _locals[1]));
break;
case Code.Ldloc_2:
_stack.Push(LocalToStackEntry(instruction, _locals[2]));
break;
case Code.Ldloc_3:
_stack.Push(LocalToStackEntry(instruction, _locals[3]));
break;
case Code.Stloc_0:
SetLocalValue(0, StackToLocalEntry(instruction, _stack.Pop()));
break;
case Code.Stloc_1:
SetLocalValue(1, StackToLocalEntry(instruction, _stack.Pop()));
break;
case Code.Stloc_2:
SetLocalValue(2, StackToLocalEntry(instruction, _stack.Pop()));
break;
case Code.Stloc_3:
SetLocalValue(3, StackToLocalEntry(instruction, _stack.Pop()));
break;
case Code.Ldarg_S:
_stack.Push(new StackEntry(instruction, false));
break;
case Code.Ldarga_S:
_stack.Push(new StackEntry(instruction, false));
break;
case Code.Starg_S:
_stack.Pop();
break;
case Code.Ldloc_S:
_stack.Push(LocalToStackEntry(instruction, _locals[0]));
break;
case Code.Ldloca_S:
_stack.Push(new StackEntry(instruction, false));
break;
case Code.Stloc_S:
_stack.Pop();
break;
case Code.Ldnull:
_stack.Push(new StackEntry(instruction, true, null));
break;
case Code.Ldc_I4_M1:
_stack.Push(new StackEntry(instruction, true, (int)-1));
break;
case Code.Ldc_I4_0:
_stack.Push(new StackEntry(instruction, true, (int)0));
break;
case Code.Ldc_I4_1:
_stack.Push(new StackEntry(instruction, true, (int)1));
break;
case Code.Ldc_I4_2:
_stack.Push(new StackEntry(instruction, true, (int)2));
break;
case Code.Ldc_I4_3:
_stack.Push(new StackEntry(instruction, true, (int)3));
break;
case Code.Ldc_I4_4:
_stack.Push(new StackEntry(instruction, true, (int)4));
break;
case Code.Ldc_I4_5:
_stack.Push(new StackEntry(instruction, true, (int)5));
break;
case Code.Ldc_I4_6:
_stack.Push(new StackEntry(instruction, true, (int)6));
break;
case Code.Ldc_I4_7:
_stack.Push(new StackEntry(instruction, true, (int)7));
break;
case Code.Ldc_I4_8:
_stack.Push(new StackEntry(instruction, true, (int)8));
break;
case Code.Ldc_I4_S:
case Code.Ldc_I4:
_stack.Push(new StackEntry(instruction, true, (int)Convert.ChangeType(instruction.Operand, typeof(int))));
break;
case Code.Ldc_I8:
_stack.Push(new StackEntry(instruction, true, (long)instruction.Operand));
break;
case Code.Ldc_R4:
_stack.Push(new StackEntry(instruction, true, instruction.Operand));
break;
case Code.Ldc_R8:
_stack.Push(new StackEntry(instruction, true, instruction.Operand));
break;
case Code.Dup:
var value = _stack.Pop();
_stack.Push(value);
value.PushedBy = instruction;
_stack.Push(value);
break;
case Code.Pop:
_stack.Pop();
break;
//TODO: Implement
/*case Code.Jmp:
break;*/
case Code.Call:
var mr = (instruction.Operand as MethodReference);
for (int i = 0; i < mr.Parameters.Count; i++)
_stack.Pop();
if ((instruction.Operand as MethodReference).ReturnType != mr.Module.Import(typeof(void)))
{
_stack.Push(new StackEntry(instruction, false));
}
break;
case Code.Calli:
break;
case Code.Ret:
break;
case Code.Br:
case Code.Br_S:
return _methodBody.Instructions.IndexOf(instruction.Operand as Instruction);
case Code.Brfalse:
case Code.Brfalse_S:
if (Stack.Peek().IsValueKnown && Stack.Peek().Value.GetType().CanCastTo<bool>(Stack.Peek().Value))
if (!Convert.ToBoolean(Stack.Pop().Value))
return _methodBody.Instructions.IndexOf(instruction.Operand as Instruction);
break;
case Code.Brtrue:
case Code.Brtrue_S:
if (Stack.Peek().IsValueKnown && Stack.Peek().Value.GetType().CanCastTo<bool>(Stack.Peek().Value))
if (Convert.ToBoolean(Stack.Pop().Value))
return _methodBody.Instructions.IndexOf(instruction.Operand as Instruction);
break;
case Code.Add:
if (Stack.VerifyTop<int>())
Stack.Push(new StackEntry(instruction, true, (dynamic)Stack.Pop().Value + (dynamic)Stack.Pop().Value));
else
{
Stack.Pop();
Stack.Pop();
Stack.Push(new StackEntry(instruction, false));
}
break;
case Code.Sub:
if (Stack.VerifyTop<int>())
{
var holder = Stack.Pop().Value;
Stack.Push(new StackEntry(instruction, true,
(dynamic) Stack.Pop().Value - (dynamic)holder));
}
else
{
Stack.Pop();
Stack.Pop();
Stack.Push(new StackEntry(instruction, false));
}
break;
case Code.Mul:
if (Stack.VerifyTop<int>())
{
var holder = Stack.Pop().Value;
Stack.Push(new StackEntry(instruction, true,
(dynamic)Stack.Pop().Value * (dynamic)holder));
}
else
{
Stack.Pop();
Stack.Pop();
Stack.Push(new StackEntry(instruction, false));
}
break;
case Code.Div_Un:
case Code.Div:
if (Stack.VerifyTop<int>())
Stack.Push(new StackEntry(instruction, true, (dynamic)Stack.Pop().Value / (dynamic)Stack.Pop().Value));
else
{
Stack.Pop();
Stack.Pop();
Stack.Push(new StackEntry(instruction, false));
}
break;
case Code.Rem:
case Code.Rem_Un:
if (Stack.VerifyTop<int>())
Stack.Push(new StackEntry(instruction, true, (dynamic)Stack.Pop().Value % (dynamic)Stack.Pop().Value));
else
{
Stack.Pop();
Stack.Pop();
Stack.Push(new StackEntry(instruction, false));
}
break;
case Code.Xor:
if (Stack.VerifyTop<int>())
Stack.Push(new StackEntry(instruction, true, (dynamic)Stack.Pop().Value ^ (dynamic)Stack.Pop().Value));
else
{
Stack.Pop();
Stack.Pop();
Stack.Push(new StackEntry(instruction, false));
}
break;
case Code.And:
if (Stack.VerifyTop<int>())
Stack.Push(new StackEntry(instruction, true, (dynamic)Stack.Pop().Value & (dynamic)Stack.Pop().Value));
else
{
Stack.Pop();
Stack.Pop();
Stack.Push(new StackEntry(instruction, false));
}
break;
case Code.Or:
if (Stack.VerifyTop<int>())
Stack.Push(new StackEntry(instruction, true, (dynamic)Stack.Pop().Value | (dynamic)Stack.Pop().Value));
else
{
Stack.Pop();
Stack.Pop();
Stack.Push(new StackEntry(instruction, false));
}
break;
case Code.Shl:
if (Stack.VerifyTop<int>())
Stack.Push(new StackEntry(instruction, true, (dynamic)Stack.Pop().Value << (dynamic)Stack.Pop().Value));
else
{
Stack.Pop();
Stack.Pop();
Stack.Push(new StackEntry(instruction, false));
}
break;
case Code.Shr_Un:
case Code.Shr:
if (Stack.VerifyTop<int>())
Stack.Push(new StackEntry(instruction, true, (dynamic)Stack.Pop().Value >> (dynamic)Stack.Pop().Value));
else
{
Stack.Pop();
Stack.Pop();
Stack.Push(new StackEntry(instruction, false));
}
break;
case Code.Neg:
if(Stack.Peek().IsValueKnown)
if (Stack.Peek().Value.IsNumeric())
{
Stack.Push(new StackEntry(instruction, true, -((dynamic) Stack.Pop().Value)));
}
break;
case Code.Ldstr:
Stack.Push(new StackEntry(instruction, true, instruction.Operand as string));
break;
case Code.Conv_I8:
if (Stack.Peek().IsValueKnown)
if (Stack.Peek().Value is int)
Stack.Push(new StackEntry(instruction, true,
(long) Convert.ChangeType(Stack.Pop().Value, typeof (long))));
break;
case Code.Conv_I1:
if (Stack.Peek().IsValueKnown)
if (Stack.Peek().Value.IsNumeric())
Stack.Push(new StackEntry(instruction, true, Convert.ToByte(Stack.Pop().Value)));
break;
case Code.Conv_I2:
if (Stack.Peek().IsValueKnown)
if (Stack.Peek().Value.IsNumeric())
Stack.Push(new StackEntry(instruction, true, Convert.ToInt16(Stack.Pop().Value)));
break;
case Code.Conv_I4:
if (Stack.Peek().IsValueKnown)
if (Stack.Peek().Value.IsNumeric())
Stack.Push(new StackEntry(instruction, true, Convert.ToInt32(Stack.Pop().Value)));
break;
case Code.Conv_R4:
break;
case Code.Conv_R8:
break;
case Code.Conv_U4:
break;
case Code.Conv_U8:
break;
case Code.Beq_S:
if (Stack.VerifyTop<int>())
{
if (Stack.Pop().Value == Stack.Pop().Value)
return _methodBody.Instructions.IndexOf(instruction.Operand as Instruction);
}
else if (Stack.VerifyTop())
if(ReferenceEquals(Stack.Pop().Value, Stack.Pop().Value))
return _methodBody.Instructions.IndexOf(instruction.Operand as Instruction);
break;
case Code.Bge:
case Code.Bge_Un_S:
case Code.Bge_S:
break;
case Code.Bgt_S:
break;
case Code.Ble_S:
break;
case Code.Blt_S:
break;
case Code.Bne_Un_S:
break;
break;
case Code.Bgt_Un_S:
break;
case Code.Ble_Un_S:
break;
case Code.Blt_Un_S:
break;
case Code.Beq:
break;
case Code.Bgt:
break;
case Code.Ble:
break;
case Code.Blt:
break;
case Code.Bne_Un:
break;
case Code.Bge_Un:
break;
case Code.Bgt_Un:
break;
case Code.Ble_Un:
break;
case Code.Blt_Un:
break;
case Code.Switch:
break;
case Code.Ldind_I1:
break;
case Code.Ldind_U1:
break;
case Code.Ldind_I2:
break;
case Code.Ldind_U2:
break;
case Code.Ldind_I4:
break;
case Code.Ldind_U4:
break;
case Code.Ldind_I8:
break;
case Code.Ldind_I:
break;
case Code.Ldind_R4:
break;
case Code.Ldind_R8:
break;
case Code.Ldind_Ref:
break;
case Code.Stind_Ref:
break;
case Code.Stind_I1:
break;
case Code.Stind_I2:
break;
case Code.Stind_I4:
break;
case Code.Stind_I8:
break;
case Code.Stind_R4:
break;
case Code.Stind_R8:
break;
case Code.Not:
break;
case Code.Callvirt:
break;
case Code.Cpobj:
break;
case Code.Ldobj:
break;
case Code.Newobj:
_stack.Push(new StackEntry(instruction, false));
break;
case Code.Castclass:
break;
case Code.Isinst:
break;
case Code.Conv_R_Un:
break;
case Code.Unbox:
break;
case Code.Throw:
break;
case Code.Ldfld:
break;
case Code.Ldflda:
break;
case Code.Stfld:
break;
case Code.Ldsfld:
break;
case Code.Ldsflda:
break;
case Code.Stsfld:
break;
case Code.Stobj:
break;
case Code.Conv_Ovf_I1_Un:
break;
case Code.Conv_Ovf_I2_Un:
break;
case Code.Conv_Ovf_I4_Un:
break;
case Code.Conv_Ovf_I8_Un:
break;
case Code.Conv_Ovf_U1_Un:
break;
case Code.Conv_Ovf_U2_Un:
break;
case Code.Conv_Ovf_U4_Un:
break;
case Code.Conv_Ovf_U8_Un:
break;
case Code.Conv_Ovf_I_Un:
break;
case Code.Conv_Ovf_U_Un:
break;
case Code.Box:
break;
case Code.Newarr:
break;
case Code.Ldlen:
break;
case Code.Ldelema:
break;
case Code.Ldelem_I1:
break;
case Code.Ldelem_U1:
break;
case Code.Ldelem_I2:
break;
case Code.Ldelem_U2:
break;
case Code.Ldelem_I4:
break;
case Code.Ldelem_U4:
break;
case Code.Ldelem_I8:
break;
case Code.Ldelem_I:
break;
case Code.Ldelem_R4:
break;
case Code.Ldelem_R8:
break;
case Code.Ldelem_Ref:
break;
case Code.Stelem_I:
break;
case Code.Stelem_I1:
break;
case Code.Stelem_I2:
break;
case Code.Stelem_I4:
break;
case Code.Stelem_I8:
break;
case Code.Stelem_R4:
break;
case Code.Stelem_R8:
break;
case Code.Stelem_Ref:
break;
case Code.Ldelem_Any:
break;
case Code.Stelem_Any:
break;
case Code.Unbox_Any:
break;
case Code.Conv_Ovf_I1:
break;
case Code.Conv_Ovf_U1:
break;
case Code.Conv_Ovf_I2:
break;
case Code.Conv_Ovf_U2:
break;
case Code.Conv_Ovf_I4:
break;
case Code.Conv_Ovf_U4:
break;
case Code.Conv_Ovf_I8:
break;
case Code.Conv_Ovf_U8:
break;
case Code.Refanyval:
break;
case Code.Ckfinite:
break;
case Code.Mkrefany:
break;
case Code.Ldtoken:
break;
case Code.Conv_U2:
break;
case Code.Conv_U1:
break;
case Code.Conv_I:
break;
case Code.Conv_Ovf_I:
break;
case Code.Conv_Ovf_U:
break;
case Code.Add_Ovf:
break;
case Code.Add_Ovf_Un:
break;
case Code.Mul_Ovf:
break;
case Code.Mul_Ovf_Un:
break;
case Code.Sub_Ovf:
break;
case Code.Sub_Ovf_Un:
break;
case Code.Endfinally:
break;
case Code.Leave:
break;
case Code.Leave_S:
break;
case Code.Stind_I:
break;
case Code.Conv_U:
break;
case Code.Arglist:
break;
case Code.Ceq:
break;
case Code.Cgt:
break;
case Code.Cgt_Un:
break;
case Code.Clt:
break;
case Code.Clt_Un:
break;
case Code.Ldftn:
break;
case Code.Ldvirtftn:
break;
case Code.Ldarg:
break;
case Code.Ldarga:
break;
case Code.Starg:
break;
case Code.Ldloc:
break;
case Code.Ldloca:
break;
case Code.Stloc:
break;
case Code.Localloc:
break;
case Code.Endfilter:
break;
case Code.Unaligned:
break;
case Code.Volatile:
break;
case Code.Tail:
break;
case Code.Initobj:
break;
case Code.Constrained:
break;
case Code.Cpblk:
break;
case Code.Initblk:
break;
case Code.No:
break;
case Code.Rethrow:
break;
case Code.Sizeof:
break;
case Code.Refanytype:
break;
case Code.Readonly:
break;
default:
wasExactInstructionProcessed = false;
break;
}
#endregion
_currentCount++;
Snapshots.Add(new Snapshot(new Stack<StackEntry>(Stack), new Dictionary<int, LocalEntry>(_locals),
instruction, _methodBody, Snapshots[Snapshots.Count -1]));
if (!wasExactInstructionProcessed)
{
switch (instruction.OpCode.StackBehaviourPush)
{
case StackBehaviour.Push0:
case StackBehaviour.Push1:
case StackBehaviour.Pushi:
case StackBehaviour.Pushi8:
case StackBehaviour.Pushr4:
case StackBehaviour.Pushr8:
case StackBehaviour.Pushref:
_stack.Push(new StackEntry(instruction, true, instruction.Operand));
break;
case StackBehaviour.Push1_push1:
_stack.Push(new StackEntry(instruction, false));
_stack.Push(new StackEntry(instruction, false));
break;
}
if (instruction.IsUnconditionalBranch())
{
return _methodBody.Instructions.IndexOf(instruction);
}
}
return ++_instructionPointer;
}
private static bool OnFunc(Instruction instr)
{
return instr.IsUnconditionalBranch();
}