rework vm

vm/environment.go

@@ -5,11 +5,10 @@ import (
 	"math/big"
 
 	"github.com/ethereum/go-ethereum/ethutil"
-	"github.com/ethereum/go-ethereum/state"
 )
 
 type Environment interface {
-	State() *state.State
+	//State() *state.State
 
 	Origin() []byte
 	BlockNumber() *big.Int
@@ -19,8 +18,16 @@ type Environment interface {
 	Difficulty() *big.Int
 	BlockHash() []byte
 	GasLimit() *big.Int
+
 	Transfer(from, to Account, amount *big.Int) error
-	AddLog(*state.Log)
+	AddLog(addr []byte, topics [][]byte, data []byte)
+	DeleteAccount(addr []byte)
+	SetState(addr, key, value []byte)
+	GetState(addr, key []byte) []byte
+	Balance(addr []byte) *big.Int
+	AddBalance(addr []byte, balance *big.Int)
+	GetCode(addr []byte) []byte
+	Refund(addr []byte, gas, price *big.Int)
 }
 
 type Object interface {
@@ -43,9 +50,5 @@ func Transfer(from, to Account, amount *big.Int) error {
 	from.SubBalance(amount)
 	to.AddBalance(amount)
 
-	// Add default LOG. Default = big(sender.addr) + 1
-	//addr := ethutil.BigD(receiver.Address())
-	//tx.addLog(vm.Log{sender.Address(), [][]byte{ethutil.U256(addr.Add(addr, ethutil.Big1)).Bytes()}, nil})
-
 	return nil
 }

vm/execution.go

@@ -90,6 +90,6 @@ func (self *Execution) exec(code, caddr []byte, caller ClosureRef) (ret []byte,
 	return
 }
 
-func (self *Execution) Create(caller ClosureRef) (ret []byte, err error) {
+func (self *Execution) Create(caller []byte) (ret []byte, err error) {
 	return self.exec(self.input, nil, caller)
 }

vm/vm_debug.go

@@ -6,7 +6,6 @@ import (
 
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/ethutil"
-	"github.com/ethereum/go-ethereum/state"
 )
 
 type DebugVm struct {
@@ -29,6 +28,13 @@ type DebugVm struct {
 	depth int
 }
 
+type Options struct {
+	Address, Caller   []byte
+	Data              []byte
+	Code              []byte
+	Value, Gas, Price *big.Int
+}
+
 func NewDebugVm(env Environment) *DebugVm {
 	lt := LogTyPretty
 	if ethutil.Config.Diff {
@@ -38,7 +44,13 @@ func NewDebugVm(env Environment) *DebugVm {
 	return &DebugVm{env: env, logTy: lt, Recoverable: true}
 }
 
-func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
+//func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
+func (self *DebugVm) Run(call Options) (ret []byte, gas *big.Int, err error) {
+	// Don't bother with the execution if there's no code.
+	if len(call.Code) == 0 {
+		return nil, new(big.Int), nil
+	}
+
 	self.depth++
 
 	if self.Recoverable {
@@ -47,41 +59,49 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 			if r := recover(); r != nil {
 				self.Endl()
 
-				closure.UseGas(closure.Gas)
-
-				ret = closure.Return(nil)
-
+				gas = new(big.Int)
 				err = fmt.Errorf("%v", r)
 
 			}
 		}()
 	}
 
+	gas = new(big.Int).Set(opt.Gas)
 	var (
 		op OpCode
 
-		destinations = analyseJumpDests(closure.Code)
+		destinations = analyseJumpDests(call.Code)
 		mem          = NewMemory()
 		stack        = NewStack()
 		pc           = big.NewInt(0)
 		step         = 0
 		prevStep     = 0
-		statedb      = self.env.State()
+		//statedb      = self.env.State()
 		require = func(m int) {
 			if stack.Len() < m {
 				panic(fmt.Sprintf("%04v (%v) stack err size = %d, required = %d", pc, op, stack.Len(), m))
 			}
 		}
 
+		useGas = func(amount *big.Int) bool {
+			if amount.Cmp(gas) > 0 {
+				return false
+			}
+
+			gas.Sub(gas, amount)
+
+			return true
+		}
+
 		jump = func(from, to *big.Int) {
-			p := int(to.Int64())
+			p := to.Uint64()
 
 			self.Printf(" ~> %v", to)
 			// Return to start
 			if p == 0 {
 				pc = big.NewInt(0)
 			} else {
-				nop := OpCode(closure.GetOp(p))
+				nop := OpCode(call.GetOp(p))
 				if !(nop == JUMPDEST || destinations[from.Int64()] != nil) {
 					panic(fmt.Sprintf("JUMP missed JUMPDEST (%v) %v", nop, p))
 				} else if nop == JUMP || nop == JUMPI {
@@ -96,17 +116,7 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 		}
 	)
 
-	// Debug hook
-	if self.Dbg != nil {
-		self.Dbg.SetCode(closure.Code)
-	}
-
-	// Don't bother with the execution if there's no code.
-	if len(closure.Code) == 0 {
-		return closure.Return(nil), nil
-	}
-
-	vmlogger.Debugf("(%d) %x gas: %v (d) %x\n", self.depth, closure.Address(), closure.Gas, closure.Args)
+	vmlogger.Debugf("(%d) %x gas: %v (d) %x\n", self.depth, call.Address, gas, call.Data)
 
 	for {
 		prevStep = step
@@ -115,10 +125,11 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 
 		step++
 		// Get the memory location of pc
-		op = closure.GetOp(int(pc.Uint64()))
+		op = call.GetOp(pc.Uint64())
 
 		// XXX Leave this Println intact. Don't change this to the log system.
 		// Used for creating diffs between implementations
+		/*
 			if self.logTy == LogTyDiff {
 				switch op {
 				case STOP, RETURN, SUICIDE:
@@ -135,11 +146,12 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 
 				fmt.Printf("%x %x %x %x\n", closure.Address(), b, []byte{byte(op)}, closure.Gas.Bytes())
 			}
+		*/
 
-		gas := new(big.Int)
+		reqGas := new(big.Int)
 		addStepGasUsage := func(amount *big.Int) {
 			if amount.Cmp(ethutil.Big0) >= 0 {
-				gas.Add(gas, amount)
+				reqGas.Add(reqGas, amount)
 			}
 		}
 
@@ -166,42 +178,43 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 			require(n + 2)
 
 			mSize, mStart := stack.Peekn()
-			gas.Set(GasLog)
+			reqGs.Set(GasLog)
 			addStepGasUsage(new(big.Int).Mul(big.NewInt(int64(n)), GasLog))
 			addStepGasUsage(new(big.Int).Add(mSize, mStart))
 		// Gas only
 		case STOP:
-			gas.Set(ethutil.Big0)
+			reqGas.Set(ethutil.Big0)
 		case SUICIDE:
 			require(1)
 
-			gas.Set(ethutil.Big0)
+			reqGas.Set(ethutil.Big0)
 		case SLOAD:
 			require(1)
 
-			gas.Set(GasSLoad)
+			reqGas.Set(GasSLoad)
 		// Memory resize & Gas
 		case SSTORE:
 			require(2)
 
 			var mult *big.Int
 			y, x := stack.Peekn()
-			val := closure.GetStorage(x)
+			val := ethutil.BigD(self.env.GetState(x.Bytes())) //closure.GetStorage(x)
 			if val.BigInt().Cmp(ethutil.Big0) == 0 && len(y.Bytes()) > 0 {
 				// 0 => non 0
 				mult = ethutil.Big3
 			} else if val.BigInt().Cmp(ethutil.Big0) != 0 && len(y.Bytes()) == 0 {
-				statedb.Refund(closure.caller.Address(), GasSStoreRefund, closure.Price)
+				//statedb.Refund(closure.caller.Address(), GasSStoreRefund, closure.Price)
+				self.env.Refund(call.Caller, GasSStoreRefund, call.Price)
 
 				mult = ethutil.Big0
 			} else {
 				// non 0 => non 0
 				mult = ethutil.Big1
 			}
-			gas.Set(new(big.Int).Mul(mult, GasSStore))
+			reqGas.Set(new(big.Int).Mul(mult, GasSStore))
 		case BALANCE:
 			require(1)
-			gas.Set(GasBalance)
+			reqGas.Set(GasBalance)
 		case MSTORE:
 			require(2)
 			newMemSize = calcMemSize(stack.Peek(), u256(32))
@@ -219,7 +232,7 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 		case SHA3:
 			require(2)
 
-			gas.Set(GasSha)
+			reqGas.Set(GasSha)
 
 			newMemSize = calcMemSize(stack.Peek(), stack.data[stack.Len()-2])
 		case CALLDATACOPY:
@@ -236,7 +249,7 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 			newMemSize = calcMemSize(stack.data[stack.Len()-2], stack.data[stack.Len()-4])
 		case CALL, CALLCODE:
 			require(7)
-			gas.Set(GasCall)
+			reqGas.Set(GasCall)
 			addStepGasUsage(stack.data[stack.Len()-1])
 
 			x := calcMemSize(stack.data[stack.Len()-6], stack.data[stack.Len()-7])
@@ -245,7 +258,7 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 			newMemSize = ethutil.BigMax(x, y)
 		case CREATE:
 			require(3)
-			gas.Set(GasCreate)
+			reqGas.Set(GasCreate)
 
 			newMemSize = calcMemSize(stack.data[stack.Len()-2], stack.data[stack.Len()-3])
 		}
@@ -255,6 +268,12 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 			newMemSize.Div(newMemSize, u256(32))
 			newMemSize.Mul(newMemSize, u256(32))
 
+			switch op {
+			// Additional gas usage on *CODPY
+			case CALLDATACOPY, CODECOPY, EXTCODECOPY:
+				addStepGasUsage(new(big.Int).Div(newMemSize, u256(32)))
+			}
+
 			if newMemSize.Cmp(u256(int64(mem.Len()))) > 0 {
 				memGasUsage := new(big.Int).Sub(newMemSize, u256(int64(mem.Len())))
 				memGasUsage.Mul(GasMemory, memGasUsage)
@@ -268,16 +287,12 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 		}
 
 		self.Printf("(pc) %-3d -o- %-14s", pc, op.String())
-		self.Printf(" (m) %-4d (s) %-4d (g) %-3v (%v)", mem.Len(), stack.Len(), gas, closure.Gas)
+		self.Printf(" (m) %-4d (s) %-4d (g) %-3v (%v)", mem.Len(), stack.Len(), reqGas, gas)
 
-		if !closure.UseGas(gas) {
+		if !useGas(regGas) {
 			self.Endl()
 
-			tmp := new(big.Int).Set(closure.Gas)
-
-			closure.UseGas(closure.Gas)
-
-			return closure.Return(nil), OOG(gas, tmp)
+			return nil, new(big.Int), OOG(reqGas, gas)
 		}
 
 		switch op {
@@ -553,13 +568,15 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 			self.Printf(" => %x", data)
 			// 0x30 range
 		case ADDRESS:
-			stack.Push(ethutil.BigD(closure.Address()))
+			//stack.Push(ethutil.BigD(closure.Address()))
+			stack.Push(ethutil.BigD(call.Address))
 
-			self.Printf(" => %x", closure.Address())
+			self.Printf(" => %x", call.Address)
 		case BALANCE:
 
 			addr := stack.Pop().Bytes()
-			balance := statedb.GetBalance(addr)
+			//balance := statedb.GetBalance(addr)
+			balance := self.env.GetBalance(addr)
 
 			stack.Push(balance)
 
@@ -571,41 +588,42 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 
 			self.Printf(" => %x", origin)
 		case CALLER:
-			caller := closure.caller.Address()
-			stack.Push(ethutil.BigD(caller))
+			//caller := closure.caller.Address()
+			//stack.Push(ethutil.BigD(caller))
+			stack.Push(call.Caller)
 
-			self.Printf(" => %x", caller)
+			self.Printf(" => %x", call.Caller)
 		case CALLVALUE:
-			value := closure.exe.value
+			//value := closure.exe.value
 
-			stack.Push(value)
+			stack.Push(call.Value)
 
-			self.Printf(" => %v", value)
+			self.Printf(" => %v", call.Value)
 		case CALLDATALOAD:
 			var (
 				offset  = stack.Pop()
 				data    = make([]byte, 32)
-				lenData = big.NewInt(int64(len(closure.Args)))
+				lenData = big.NewInt(int64(len(call.Data)))
 			)
 
 			if lenData.Cmp(offset) >= 0 {
 				length := new(big.Int).Add(offset, ethutil.Big32)
 				length = ethutil.BigMin(length, lenData)
 
-				copy(data, closure.Args[offset.Int64():length.Int64()])
+				copy(data, call.Data[offset.Int64():length.Int64()])
 			}
 
 			self.Printf(" => 0x%x", data)
 
 			stack.Push(ethutil.BigD(data))
 		case CALLDATASIZE:
-			l := int64(len(closure.Args))
+			l := int64(len(call.Data))
 			stack.Push(big.NewInt(l))
 
 			self.Printf(" => %d", l)
 		case CALLDATACOPY:
 			var (
-				size = int64(len(closure.Args))
+				size = int64(len(call.Data))
 				mOff = stack.Pop().Int64()
 				cOff = stack.Pop().Int64()
 				l    = stack.Pop().Int64()
@@ -618,7 +636,7 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 				l = 0
 			}
 
-			code := closure.Args[cOff : cOff+l]
+			code := call.Data[cOff : cOff+l]
 
 			mem.Set(mOff, l, code)
 
@@ -628,9 +646,9 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 			if op == EXTCODESIZE {
 				addr := stack.Pop().Bytes()
 
-				code = statedb.GetCode(addr)
+				self.env.GetCode(addr)
 			} else {
-				code = closure.Code
+				code = call.Code
 			}
 
 			l := big.NewInt(int64(len(code)))
@@ -642,9 +660,9 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 			if op == EXTCODECOPY {
 				addr := stack.Pop().Bytes()
 
-				code = statedb.GetCode(addr)
+				code = self.env.GetCode(addr)
 			} else {
-				code = closure.Code
+				code = call.Code
 			}
 
 			var (
@@ -667,9 +685,9 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 
 			self.Printf(" => [%v, %v, %v] %x", mOff, cOff, l, code[cOff:cOff+l])
 		case GASPRICE:
-			stack.Push(closure.Price)
+			stack.Push(call.Price)
 
-			self.Printf(" => %v", closure.Price)
+			self.Printf(" => %v", call.Price)
 
 			// 0x40 range
 		case PREVHASH:
@@ -707,17 +725,17 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 
 			// 0x50 range
 		case PUSH1, PUSH2, PUSH3, PUSH4, PUSH5, PUSH6, PUSH7, PUSH8, PUSH9, PUSH10, PUSH11, PUSH12, PUSH13, PUSH14, PUSH15, PUSH16, PUSH17, PUSH18, PUSH19, PUSH20, PUSH21, PUSH22, PUSH23, PUSH24, PUSH25, PUSH26, PUSH27, PUSH28, PUSH29, PUSH30, PUSH31, PUSH32:
-			a := big.NewInt(int64(op) - int64(PUSH1) + 1)
+			a := uint64(op) - uint64(PUSH1) + 1
 			pc.Add(pc, ethutil.Big1)
-			data := closure.Gets(pc, a)
-			val := ethutil.BigD(data.Bytes())
+			data := call.Get(pc.Uint64(), a) //closure.Gets(pc, a)
+			val := ethutil.BigD(data)
 			// Push value to stack
 			stack.Push(val)
-			pc.Add(pc, a.Sub(a, big.NewInt(1)))
+			pc.Add(pc, big.NewInt(int64(a)-1))
 
-			step += int(op) - int(PUSH1) + 1
+			step += uint64(op) - uint64(PUSH1) + 1
 
-			self.Printf(" => 0x%x", data.Bytes())
+			self.Printf(" => 0x%x", data)
 		case POP:
 			stack.Pop()
 		case DUP1, DUP2, DUP3, DUP4, DUP5, DUP6, DUP7, DUP8, DUP9, DUP10, DUP11, DUP12, DUP13, DUP14, DUP15, DUP16:
@@ -725,10 +743,6 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 			v := stack.Dupn(n)
 
 			self.Printf(" => [%d] 0x%x", n, stack.Peek().Bytes())
-
-			if OpCode(closure.Get(new(big.Int).Add(pc, ethutil.Big1)).Uint()) == POP && OpCode(closure.Get(new(big.Int).Add(pc, big.NewInt(2))).Uint()) == POP {
-				fmt.Println(toValue(v))
-			}
 		case SWAP1, SWAP2, SWAP3, SWAP4, SWAP5, SWAP6, SWAP7, SWAP8, SWAP9, SWAP10, SWAP11, SWAP12, SWAP13, SWAP14, SWAP15, SWAP16:
 			n := int(op - SWAP1 + 2)
 			x, y := stack.Swapn(n)
@@ -743,8 +757,8 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 				topics[i] = stack.Pop().Bytes()
 			}
 
-			log := &state.Log{closure.Address(), topics, data}
-			self.env.AddLog(log)
+			//log := &state.Log{closure.Address(), topics, data}
+			self.env.AddLog(call.Address, topics, data)
 
 			self.Printf(" => %v", log)
 		case MLOAD:
@@ -768,18 +782,16 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 			self.Printf(" => [%v] 0x%x", off, val)
 		case SLOAD:
 			loc := stack.Pop()
-			val := ethutil.BigD(statedb.GetState(closure.Address(), loc.Bytes()))
+			val := ethutil.BigD(self.env.GetState(call.Address, loc.Bytes()))
 			stack.Push(val)
 
 			self.Printf(" {0x%x : 0x%x}", loc.Bytes(), val.Bytes())
 		case SSTORE:
 			val, loc := stack.Popn()
-			statedb.SetState(closure.Address(), loc.Bytes(), val)
+			self.env.SetState(call.Address, loc.Bytes(), val.Bytes())
+			//statedb.SetState(closure.Address(), loc.Bytes(), val)
 
-			// Debug sessions are allowed to run without message
-			if closure.message != nil {
-				closure.message.AddStorageChange(loc.Bytes())
-			}
+			//closure.message.AddStorageChange(loc.Bytes())
 
 			self.Printf(" {0x%x : 0x%x}", loc.Bytes(), val.Bytes())
 		case JUMP:
@@ -802,7 +814,7 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 		case MSIZE:
 			stack.Push(big.NewInt(int64(mem.Len())))
 		case GAS:
-			stack.Push(closure.Gas)
+			stack.Push(call.Gas)
 			// 0x60 range
 		case CREATE:
 			var (
@@ -810,7 +822,7 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 				value        = stack.Pop()
 				size, offset = stack.Popn()
 				input        = mem.Get(offset.Int64(), size.Int64())
-				gas          = new(big.Int).Set(closure.Gas)
+				gas          = new(big.Int).Set(call.Gas)
 
 				// Snapshot the current stack so we are able to
 				// revert back to it later.
@@ -818,16 +830,19 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 			)
 
 			// Generate a new address
-			n := statedb.GetNonce(closure.Address())
-			addr := crypto.CreateAddress(closure.Address(), n)
-			statedb.SetNonce(closure.Address(), n+1)
+			//n := statedb.GetNonce(closure.Address())
+			//addr := crypto.CreateAddress(closure.Address(), n)
+			//statedb.SetNonce(closure.Address(), n+1)
+			n := self.env.GetNonce(call.Address)
+			addr := crypto.CreateAddress(call.Address, n)
+			self.env.SetNonce(call.Address, n+1)
 
 			self.Printf(" (*) %x", addr).Endl()
 
-			closure.UseGas(closure.Gas)
+			//closure.UseGas(closure.Gas)
 
-			msg := NewExecution(self, addr, input, gas, closure.Price, value)
-			ret, err := msg.Create(closure)
+			msg := NewExecution(self, addr, input, gas, call.Price, value)
+			ret, lgas, err := msg.Create(call.Address)
 			if err != nil {
 				stack.Push(ethutil.BigFalse)
 
@@ -841,12 +856,9 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 				stack.Push(ethutil.BigD(addr))
 			}
 
-			self.Endl()
+			gas = lgas
 
-			// Debug hook
-			if self.Dbg != nil {
-				self.Dbg.SetCode(closure.Code)
-			}
+			self.Endl()
 		case CALL, CALLCODE:
 			self.Endl()
 
@@ -863,12 +875,12 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 
 			var executeAddr []byte
 			if op == CALLCODE {
-				executeAddr = closure.Address()
+				executeAddr = call.Address //closure.Address()
 			} else {
 				executeAddr = addr.Bytes()
 			}
 
-			msg := NewExecution(self, executeAddr, args, gas, closure.Price, value)
+			msg := NewExecution(self, executeAddr, args, gas, call.Price, value)
 			ret, err := msg.Exec(addr.Bytes(), closure)
 			if err != nil {
 				stack.Push(ethutil.BigFalse)
@@ -881,24 +893,22 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 			}
 			self.Printf("resume %x", closure.Address())
 
-			// Debug hook
-			if self.Dbg != nil {
-				self.Dbg.SetCode(closure.Code)
-			}
-
 		case RETURN:
 			size, offset := stack.Popn()
 			ret := mem.Get(offset.Int64(), size.Int64())
 
 			self.Printf(" => (%d) 0x%x", len(ret), ret).Endl()
 
-			return closure.Return(ret), nil
-		case SUICIDE:
+			return ret, gas, nil
 
-			receiver := statedb.GetOrNewStateObject(stack.Pop().Bytes())
+			//return closure.Return(ret), gas, nil
+		case SUICIDE:
+			//receiver := statedb.GetOrNewStateObject(stack.Pop().Bytes())
+			//receiver.AddAmount(statedb.GetBalance(closure.Address()))
+			//statedb.Delete(closure.Address())
 
-			receiver.AddAmount(statedb.GetBalance(closure.Address()))
-			statedb.Delete(closure.Address())
+			self.env.AddBalance(stack.Pop().Bytes(), self.env.Balance(call.Address))
+			self.env.DeleteAccount(call.Address)
 
 			fallthrough
 		case STOP: // Stop the closure
@@ -917,23 +927,6 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 		pc.Add(pc, ethutil.Big1)
 
 		self.Endl()
-
-		if self.Dbg != nil {
-			for _, instrNo := range self.Dbg.BreakPoints() {
-				if pc.Cmp(big.NewInt(instrNo)) == 0 {
-					self.Stepping = true
-
-					if !self.Dbg.BreakHook(prevStep, op, mem, stack, statedb.GetStateObject(closure.Address())) {
-						return nil, nil
-					}
-				} else if self.Stepping {
-					if !self.Dbg.StepHook(prevStep, op, mem, stack, statedb.GetStateObject(closure.Address())) {
-						return nil, nil
-					}
-				}
-			}
-		}
-
 	}
 }