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-rw-r--r--vm/vm.go1021
1 files changed, 1021 insertions, 0 deletions
diff --git a/vm/vm.go b/vm/vm.go
new file mode 100644
index 000000000..890a7dd2c
--- /dev/null
+++ b/vm/vm.go
@@ -0,0 +1,1021 @@
+package vm
+
+import (
+ "fmt"
+ "math/big"
+
+ "github.com/ethereum/go-ethereum/crypto"
+ "github.com/ethereum/go-ethereum/ethutil"
+ "github.com/ethereum/go-ethereum/state"
+)
+
+type Vm struct {
+ env Environment
+
+ logTy byte
+ logStr string
+
+ err error
+ // For logging
+ debug bool
+
+ Dbg Debugger
+
+ BreakPoints []int64
+ Stepping bool
+ Fn string
+
+ Recoverable bool
+}
+
+func New(env Environment) *Vm {
+ lt := LogTyPretty
+
+ return &Vm{debug: Debug, env: env, logTy: lt, Recoverable: true}
+}
+
+func (self *Vm) Run(me, caller ContextRef, code []byte, value, gas, price *big.Int, callData []byte) (ret []byte, err error) {
+ self.env.SetDepth(self.env.Depth() + 1)
+
+ context := NewContext(caller, me, code, gas, price)
+
+ vmlogger.Debugf("(%d) (%x) %x (code=%d) gas: %v (d) %x\n", self.env.Depth(), caller.Address()[:4], context.Address(), len(code), context.Gas, callData)
+
+ if self.Recoverable {
+ // Recover from any require exception
+ defer func() {
+ if r := recover(); r != nil {
+ self.Printf(" %v", r).Endl()
+
+ context.UseGas(context.Gas)
+
+ ret = context.Return(nil)
+
+ err = fmt.Errorf("%v", r)
+
+ }
+ }()
+ }
+
+ if p := Precompiled[string(me.Address())]; p != nil {
+ return self.RunPrecompiled(p, callData, context)
+ }
+
+ var (
+ op OpCode
+
+ destinations = analyseJumpDests(context.Code)
+ mem = NewMemory()
+ stack = NewStack()
+ pc uint64 = 0
+ step = 0
+ prevStep = 0
+ statedb = self.env.State()
+
+ jump = func(from uint64, to *big.Int) {
+ p := to.Uint64()
+
+ nop := context.GetOp(p)
+ if !destinations.Has(p) {
+ panic(fmt.Sprintf("invalid jump destination (%v) %v", nop, p))
+ }
+
+ self.Printf(" ~> %v", to)
+ pc = to.Uint64()
+
+ self.Endl()
+ }
+ )
+
+ // Don't bother with the execution if there's no code.
+ if len(code) == 0 {
+ return context.Return(nil), nil
+ }
+
+ for {
+ prevStep = step
+ // The base for all big integer arithmetic
+ base := new(big.Int)
+
+ step++
+ // Get the memory location of pc
+ op = context.GetOp(pc)
+
+ self.Printf("(pc) %-3d -o- %-14s (m) %-4d (s) %-4d ", pc, op.String(), mem.Len(), stack.Len())
+ if self.Dbg != nil {
+ //self.Dbg.Step(self, op, mem, stack, context)
+ }
+
+ newMemSize, gas := self.calculateGasAndSize(context, caller, op, statedb, mem, stack)
+
+ self.Printf("(g) %-3v (%v)", gas, context.Gas)
+
+ if !context.UseGas(gas) {
+ self.Endl()
+
+ tmp := new(big.Int).Set(context.Gas)
+
+ context.UseGas(context.Gas)
+
+ return context.Return(nil), OOG(gas, tmp)
+ }
+
+ mem.Resize(newMemSize.Uint64())
+
+ switch op {
+ // 0x20 range
+ case ADD:
+ x, y := stack.Popn()
+ self.Printf(" %v + %v", y, x)
+
+ base.Add(y, x)
+
+ U256(base)
+
+ self.Printf(" = %v", base)
+ // Pop result back on the stack
+ stack.Push(base)
+ case SUB:
+ x, y := stack.Popn()
+ self.Printf(" %v - %v", y, x)
+
+ base.Sub(y, x)
+
+ U256(base)
+
+ self.Printf(" = %v", base)
+ // Pop result back on the stack
+ stack.Push(base)
+ case MUL:
+ x, y := stack.Popn()
+ self.Printf(" %v * %v", y, x)
+
+ base.Mul(y, x)
+
+ U256(base)
+
+ self.Printf(" = %v", base)
+ // Pop result back on the stack
+ stack.Push(base)
+ case DIV:
+ x, y := stack.Pop(), stack.Pop()
+ self.Printf(" %v / %v", x, y)
+
+ if y.Cmp(ethutil.Big0) != 0 {
+ base.Div(x, y)
+ }
+
+ U256(base)
+
+ self.Printf(" = %v", base)
+ // Pop result back on the stack
+ stack.Push(base)
+ case SDIV:
+ x, y := S256(stack.Pop()), S256(stack.Pop())
+
+ self.Printf(" %v / %v", x, y)
+
+ if y.Cmp(ethutil.Big0) == 0 {
+ base.Set(ethutil.Big0)
+ } else {
+ n := new(big.Int)
+ if new(big.Int).Mul(x, y).Cmp(ethutil.Big0) < 0 {
+ n.SetInt64(-1)
+ } else {
+ n.SetInt64(1)
+ }
+
+ base.Div(x.Abs(x), y.Abs(y)).Mul(base, n)
+
+ U256(base)
+ }
+
+ self.Printf(" = %v", base)
+ stack.Push(base)
+ case MOD:
+ x, y := stack.Pop(), stack.Pop()
+
+ self.Printf(" %v %% %v", x, y)
+
+ if y.Cmp(ethutil.Big0) == 0 {
+ base.Set(ethutil.Big0)
+ } else {
+ base.Mod(x, y)
+ }
+
+ U256(base)
+
+ self.Printf(" = %v", base)
+ stack.Push(base)
+ case SMOD:
+ x, y := S256(stack.Pop()), S256(stack.Pop())
+
+ self.Printf(" %v %% %v", x, y)
+
+ if y.Cmp(ethutil.Big0) == 0 {
+ base.Set(ethutil.Big0)
+ } else {
+ n := new(big.Int)
+ if x.Cmp(ethutil.Big0) < 0 {
+ n.SetInt64(-1)
+ } else {
+ n.SetInt64(1)
+ }
+
+ base.Mod(x.Abs(x), y.Abs(y)).Mul(base, n)
+
+ U256(base)
+ }
+
+ self.Printf(" = %v", base)
+ stack.Push(base)
+
+ case EXP:
+ x, y := stack.Popn()
+
+ self.Printf(" %v ** %v", y, x)
+
+ base.Exp(y, x, Pow256)
+
+ U256(base)
+
+ self.Printf(" = %v", base)
+
+ stack.Push(base)
+ case SIGNEXTEND:
+ back := stack.Pop().Uint64()
+ if back < 31 {
+ bit := uint(back*8 + 7)
+ num := stack.Pop()
+ mask := new(big.Int).Lsh(ethutil.Big1, bit)
+ mask.Sub(mask, ethutil.Big1)
+ if ethutil.BitTest(num, int(bit)) {
+ num.Or(num, mask.Not(mask))
+ } else {
+ num.And(num, mask)
+ }
+
+ num = U256(num)
+
+ self.Printf(" = %v", num)
+
+ stack.Push(num)
+ }
+ case NOT:
+ base.Sub(Pow256, stack.Pop()).Sub(base, ethutil.Big1)
+
+ // Not needed
+ base = U256(base)
+
+ stack.Push(base)
+ case LT:
+ x, y := stack.Popn()
+ self.Printf(" %v < %v", y, x)
+ // x < y
+ if y.Cmp(x) < 0 {
+ stack.Push(ethutil.BigTrue)
+ } else {
+ stack.Push(ethutil.BigFalse)
+ }
+ case GT:
+ x, y := stack.Popn()
+ self.Printf(" %v > %v", y, x)
+
+ // x > y
+ if y.Cmp(x) > 0 {
+ stack.Push(ethutil.BigTrue)
+ } else {
+ stack.Push(ethutil.BigFalse)
+ }
+
+ case SLT:
+ y, x := S256(stack.Pop()), S256(stack.Pop())
+ self.Printf(" %v < %v", y, x)
+ // x < y
+ if y.Cmp(S256(x)) < 0 {
+ stack.Push(ethutil.BigTrue)
+ } else {
+ stack.Push(ethutil.BigFalse)
+ }
+ case SGT:
+ y, x := S256(stack.Pop()), S256(stack.Pop())
+ self.Printf(" %v > %v", y, x)
+
+ // x > y
+ if y.Cmp(x) > 0 {
+ stack.Push(ethutil.BigTrue)
+ } else {
+ stack.Push(ethutil.BigFalse)
+ }
+
+ case EQ:
+ x, y := stack.Popn()
+ self.Printf(" %v == %v", y, x)
+
+ // x == y
+ if x.Cmp(y) == 0 {
+ stack.Push(ethutil.BigTrue)
+ } else {
+ stack.Push(ethutil.BigFalse)
+ }
+ case ISZERO:
+ x := stack.Pop()
+ if x.Cmp(ethutil.BigFalse) > 0 {
+ stack.Push(ethutil.BigFalse)
+ } else {
+ stack.Push(ethutil.BigTrue)
+ }
+
+ // 0x10 range
+ case AND:
+ x, y := stack.Popn()
+ self.Printf(" %v & %v", y, x)
+
+ stack.Push(base.And(y, x))
+ case OR:
+ x, y := stack.Popn()
+ self.Printf(" %v | %v", y, x)
+
+ stack.Push(base.Or(y, x))
+ case XOR:
+ x, y := stack.Popn()
+ self.Printf(" %v ^ %v", y, x)
+
+ stack.Push(base.Xor(y, x))
+ case BYTE:
+ val, th := stack.Popn()
+
+ if th.Cmp(big.NewInt(32)) < 0 {
+ byt := big.NewInt(int64(ethutil.LeftPadBytes(val.Bytes(), 32)[th.Int64()]))
+
+ base.Set(byt)
+ } else {
+ base.Set(ethutil.BigFalse)
+ }
+
+ self.Printf(" => 0x%x", base.Bytes())
+
+ stack.Push(base)
+ case ADDMOD:
+
+ x := stack.Pop()
+ y := stack.Pop()
+ z := stack.Pop()
+
+ add := new(big.Int).Add(x, y)
+ if len(z.Bytes()) > 0 { // NOT 0x0
+ base.Mod(add, z)
+
+ U256(base)
+ }
+
+ self.Printf(" %v + %v %% %v = %v", x, y, z, base)
+
+ stack.Push(base)
+ case MULMOD:
+
+ x := stack.Pop()
+ y := stack.Pop()
+ z := stack.Pop()
+
+ mul := new(big.Int).Mul(x, y)
+ if len(z.Bytes()) > 0 { // NOT 0x0
+ base.Mod(mul, z)
+
+ U256(base)
+ }
+
+ self.Printf(" %v + %v %% %v = %v", x, y, z, base)
+
+ stack.Push(base)
+
+ // 0x20 range
+ case SHA3:
+ size, offset := stack.Popn()
+ data := crypto.Sha3(mem.Get(offset.Int64(), size.Int64()))
+
+ stack.Push(ethutil.BigD(data))
+
+ self.Printf(" => (%v) %x", size, data)
+ // 0x30 range
+ case ADDRESS:
+ stack.Push(ethutil.BigD(context.Address()))
+
+ self.Printf(" => %x", context.Address())
+ case BALANCE:
+
+ addr := stack.Pop().Bytes()
+ var balance *big.Int
+ if statedb.GetStateObject(addr) != nil {
+ balance = statedb.GetBalance(addr)
+ } else {
+ balance = base
+ }
+
+ stack.Push(balance)
+
+ self.Printf(" => %v (%x)", balance, addr)
+ case ORIGIN:
+ origin := self.env.Origin()
+
+ stack.Push(ethutil.BigD(origin))
+
+ self.Printf(" => %x", origin)
+ case CALLER:
+ caller := context.caller.Address()
+ stack.Push(ethutil.BigD(caller))
+
+ self.Printf(" => %x", caller)
+ case CALLVALUE:
+ stack.Push(value)
+
+ self.Printf(" => %v", value)
+ case CALLDATALOAD:
+ var (
+ offset = stack.Pop()
+ data = make([]byte, 32)
+ lenData = big.NewInt(int64(len(callData)))
+ )
+
+ if lenData.Cmp(offset) >= 0 {
+ length := new(big.Int).Add(offset, ethutil.Big32)
+ length = ethutil.BigMin(length, lenData)
+
+ copy(data, callData[offset.Int64():length.Int64()])
+ }
+
+ self.Printf(" => 0x%x", data)
+
+ stack.Push(ethutil.BigD(data))
+ case CALLDATASIZE:
+ l := int64(len(callData))
+ stack.Push(big.NewInt(l))
+
+ self.Printf(" => %d", l)
+ case CALLDATACOPY:
+ var (
+ size = uint64(len(callData))
+ mOff = stack.Pop().Uint64()
+ cOff = stack.Pop().Uint64()
+ l = stack.Pop().Uint64()
+ )
+
+ if cOff > size {
+ cOff = 0
+ l = 0
+ } else if cOff+l > size {
+ l = 0
+ }
+
+ code := callData[cOff : cOff+l]
+
+ mem.Set(mOff, l, code)
+
+ self.Printf(" => [%v, %v, %v] %x", mOff, cOff, l, callData[cOff:cOff+l])
+ case CODESIZE, EXTCODESIZE:
+ var code []byte
+ if op == EXTCODESIZE {
+ addr := stack.Pop().Bytes()
+
+ code = statedb.GetCode(addr)
+ } else {
+ code = context.Code
+ }
+
+ l := big.NewInt(int64(len(code)))
+ stack.Push(l)
+
+ self.Printf(" => %d", l)
+ case CODECOPY, EXTCODECOPY:
+ var code []byte
+ if op == EXTCODECOPY {
+ code = statedb.GetCode(stack.Pop().Bytes())
+ } else {
+ code = context.Code
+ }
+ context := NewContext(nil, nil, code, ethutil.Big0, ethutil.Big0)
+ var (
+ mOff = stack.Pop().Uint64()
+ cOff = stack.Pop().Uint64()
+ l = stack.Pop().Uint64()
+ )
+ codeCopy := context.GetCode(cOff, l)
+
+ mem.Set(mOff, l, codeCopy)
+
+ self.Printf(" => [%v, %v, %v] %x", mOff, cOff, l, codeCopy)
+ case GASPRICE:
+ stack.Push(context.Price)
+
+ self.Printf(" => %x", context.Price)
+
+ // 0x40 range
+ case BLOCKHASH:
+ num := stack.Pop()
+
+ n := new(big.Int).Sub(self.env.BlockNumber(), ethutil.Big257)
+ if num.Cmp(n) > 0 && num.Cmp(self.env.BlockNumber()) < 0 {
+ stack.Push(ethutil.BigD(self.env.GetHash(num.Uint64())))
+ } else {
+ stack.Push(ethutil.Big0)
+ }
+
+ self.Printf(" => 0x%x", stack.Peek().Bytes())
+ case COINBASE:
+ coinbase := self.env.Coinbase()
+
+ stack.Push(ethutil.BigD(coinbase))
+
+ self.Printf(" => 0x%x", coinbase)
+ case TIMESTAMP:
+ time := self.env.Time()
+
+ stack.Push(big.NewInt(time))
+
+ self.Printf(" => 0x%x", time)
+ case NUMBER:
+ number := self.env.BlockNumber()
+
+ stack.Push(U256(number))
+
+ self.Printf(" => 0x%x", number.Bytes())
+ case DIFFICULTY:
+ difficulty := self.env.Difficulty()
+
+ stack.Push(difficulty)
+
+ self.Printf(" => 0x%x", difficulty.Bytes())
+ case GASLIMIT:
+ self.Printf(" => %v", self.env.GasLimit())
+
+ stack.Push(self.env.GasLimit())
+
+ // 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 := uint64(op - PUSH1 + 1)
+ byts := context.GetRangeValue(pc+1, a)
+ // Push value to stack
+ stack.Push(ethutil.BigD(byts))
+ pc += a
+
+ step += int(op) - int(PUSH1) + 1
+
+ self.Printf(" => 0x%x", byts)
+ case POP:
+ stack.Pop()
+ case DUP1, DUP2, DUP3, DUP4, DUP5, DUP6, DUP7, DUP8, DUP9, DUP10, DUP11, DUP12, DUP13, DUP14, DUP15, DUP16:
+ n := int(op - DUP1 + 1)
+ stack.Dupn(n)
+
+ self.Printf(" => [%d] 0x%x", n, stack.Peek().Bytes())
+ 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)
+
+ self.Printf(" => [%d] %x [0] %x", n, x.Bytes(), y.Bytes())
+ case LOG0, LOG1, LOG2, LOG3, LOG4:
+ n := int(op - LOG0)
+ topics := make([][]byte, n)
+ mSize, mStart := stack.Popn()
+ for i := 0; i < n; i++ {
+ topics[i] = ethutil.LeftPadBytes(stack.Pop().Bytes(), 32)
+ }
+
+ data := mem.Get(mStart.Int64(), mSize.Int64())
+ log := &Log{context.Address(), topics, data, self.env.BlockNumber().Uint64()}
+ self.env.AddLog(log)
+
+ self.Printf(" => %v", log)
+ case MLOAD:
+ offset := stack.Pop()
+ val := ethutil.BigD(mem.Get(offset.Int64(), 32))
+ stack.Push(val)
+
+ self.Printf(" => 0x%x", val.Bytes())
+ case MSTORE: // Store the value at stack top-1 in to memory at location stack top
+ // Pop value of the stack
+ val, mStart := stack.Popn()
+ mem.Set(mStart.Uint64(), 32, ethutil.BigToBytes(val, 256))
+
+ self.Printf(" => 0x%x", val)
+ case MSTORE8:
+ off := stack.Pop()
+ val := stack.Pop()
+
+ mem.store[off.Int64()] = byte(val.Int64() & 0xff)
+
+ self.Printf(" => [%v] 0x%x", off, val)
+ case SLOAD:
+ loc := stack.Pop()
+ val := ethutil.BigD(statedb.GetState(context.Address(), loc.Bytes()))
+ stack.Push(val)
+
+ self.Printf(" {0x%x : 0x%x}", loc.Bytes(), val.Bytes())
+ case SSTORE:
+ val, loc := stack.Popn()
+ statedb.SetState(context.Address(), loc.Bytes(), val)
+
+ self.Printf(" {0x%x : 0x%x}", loc.Bytes(), val.Bytes())
+ case JUMP:
+ jump(pc, stack.Pop())
+
+ continue
+ case JUMPI:
+ cond, pos := stack.Popn()
+
+ if cond.Cmp(ethutil.BigTrue) >= 0 {
+ jump(pc, pos)
+
+ continue
+ }
+
+ self.Printf(" ~> false")
+
+ case JUMPDEST:
+ case PC:
+ stack.Push(big.NewInt(int64(pc)))
+ case MSIZE:
+ stack.Push(big.NewInt(int64(mem.Len())))
+ case GAS:
+ stack.Push(context.Gas)
+
+ self.Printf(" => %x", context.Gas)
+ // 0x60 range
+ case CREATE:
+
+ var (
+ value = stack.Pop()
+ size, offset = stack.Popn()
+ input = mem.Get(offset.Int64(), size.Int64())
+ gas = new(big.Int).Set(context.Gas)
+ addr []byte
+ )
+ self.Endl()
+
+ context.UseGas(context.Gas)
+ ret, suberr, ref := self.env.Create(context, nil, input, gas, price, value)
+ if suberr != nil {
+ stack.Push(ethutil.BigFalse)
+
+ self.Printf(" (*) 0x0 %v", suberr)
+ } else {
+
+ // gas < len(ret) * CreateDataGas == NO_CODE
+ dataGas := big.NewInt(int64(len(ret)))
+ dataGas.Mul(dataGas, GasCreateByte)
+ if context.UseGas(dataGas) {
+ ref.SetCode(ret)
+ }
+ addr = ref.Address()
+
+ stack.Push(ethutil.BigD(addr))
+
+ }
+
+ // Debug hook
+ if self.Dbg != nil {
+ self.Dbg.SetCode(context.Code)
+ }
+ case CALL, CALLCODE:
+ gas := stack.Pop()
+ // Pop gas and value of the stack.
+ value, addr := stack.Popn()
+ value = U256(value)
+ // Pop input size and offset
+ inSize, inOffset := stack.Popn()
+ // Pop return size and offset
+ retSize, retOffset := stack.Popn()
+
+ address := ethutil.Address(addr.Bytes())
+ self.Printf(" => %x", address).Endl()
+
+ // Get the arguments from the memory
+ args := mem.Get(inOffset.Int64(), inSize.Int64())
+
+ if len(value.Bytes()) > 0 {
+ gas.Add(gas, GasStipend)
+ }
+
+ var (
+ ret []byte
+ err error
+ )
+ if op == CALLCODE {
+ ret, err = self.env.CallCode(context, address, args, gas, price, value)
+ } else {
+ ret, err = self.env.Call(context, address, args, gas, price, value)
+ }
+
+ if err != nil {
+ stack.Push(ethutil.BigFalse)
+
+ vmlogger.Debugln(err)
+ } else {
+ stack.Push(ethutil.BigTrue)
+
+ mem.Set(retOffset.Uint64(), retSize.Uint64(), ret)
+ }
+ self.Printf("resume %x (%v)", context.Address(), context.Gas)
+
+ // Debug hook
+ if self.Dbg != nil {
+ self.Dbg.SetCode(context.Code)
+ }
+
+ case RETURN:
+ size, offset := stack.Popn()
+ ret := mem.Get(offset.Int64(), size.Int64())
+
+ self.Printf(" => [%v, %v] (%d) 0x%x", offset, size, len(ret), ret).Endl()
+
+ return context.Return(ret), nil
+ case SUICIDE:
+ receiver := statedb.GetOrNewStateObject(stack.Pop().Bytes())
+ balance := statedb.GetBalance(context.Address())
+
+ self.Printf(" => (%x) %v", receiver.Address()[:4], balance)
+
+ receiver.AddBalance(balance)
+ statedb.Delete(context.Address())
+
+ fallthrough
+ case STOP: // Stop the context
+ self.Endl()
+
+ return context.Return(nil), nil
+ default:
+ vmlogger.Debugf("(pc) %-3v Invalid opcode %x\n", pc, op)
+
+ panic(fmt.Errorf("Invalid opcode %x", op))
+ }
+
+ pc++
+
+ self.Endl()
+
+ if self.Dbg != nil {
+ for _, instrNo := range self.Dbg.BreakPoints() {
+ if pc == uint64(instrNo) {
+ self.Stepping = true
+
+ if !self.Dbg.BreakHook(prevStep, op, mem, stack, statedb.GetStateObject(context.Address())) {
+ return nil, nil
+ }
+ } else if self.Stepping {
+ if !self.Dbg.StepHook(prevStep, op, mem, stack, statedb.GetStateObject(context.Address())) {
+ return nil, nil
+ }
+ }
+ }
+ }
+
+ }
+}
+
+type req struct {
+ stack int
+ gas *big.Int
+}
+
+var _baseCheck = map[OpCode]req{
+ // Req Stack Gas price
+ ADD: {2, GasFastestStep},
+ LT: {2, GasFastestStep},
+ GT: {2, GasFastestStep},
+ SLT: {2, GasFastestStep},
+ SGT: {2, GasFastestStep},
+ EQ: {2, GasFastestStep},
+ ISZERO: {1, GasFastestStep},
+ SUB: {2, GasFastestStep},
+ AND: {2, GasFastestStep},
+ OR: {2, GasFastestStep},
+ XOR: {2, GasFastestStep},
+ NOT: {1, GasFastestStep},
+ BYTE: {2, GasFastestStep},
+ CALLDATALOAD: {1, GasFastestStep},
+ CALLDATACOPY: {3, GasFastestStep},
+ MLOAD: {1, GasFastestStep},
+ MSTORE: {2, GasFastestStep},
+ MSTORE8: {2, GasFastestStep},
+ CODECOPY: {3, GasFastestStep},
+ MUL: {2, GasFastStep},
+ DIV: {2, GasFastStep},
+ SDIV: {2, GasFastStep},
+ MOD: {2, GasFastStep},
+ SMOD: {2, GasFastStep},
+ SIGNEXTEND: {2, GasFastStep},
+ ADDMOD: {3, GasMidStep},
+ MULMOD: {3, GasMidStep},
+ JUMP: {1, GasMidStep},
+ JUMPI: {2, GasSlowStep},
+ EXP: {2, GasSlowStep},
+ ADDRESS: {0, GasQuickStep},
+ ORIGIN: {0, GasQuickStep},
+ CALLER: {0, GasQuickStep},
+ CALLVALUE: {0, GasQuickStep},
+ CODESIZE: {0, GasQuickStep},
+ GASPRICE: {0, GasQuickStep},
+ COINBASE: {0, GasQuickStep},
+ TIMESTAMP: {0, GasQuickStep},
+ NUMBER: {0, GasQuickStep},
+ CALLDATASIZE: {0, GasQuickStep},
+ DIFFICULTY: {0, GasQuickStep},
+ GASLIMIT: {0, GasQuickStep},
+ POP: {0, GasQuickStep},
+ PC: {0, GasQuickStep},
+ MSIZE: {0, GasQuickStep},
+ GAS: {0, GasQuickStep},
+ BLOCKHASH: {1, GasExtStep},
+ BALANCE: {0, GasExtStep},
+ EXTCODESIZE: {1, GasExtStep},
+ EXTCODECOPY: {4, GasExtStep},
+ SLOAD: {1, GasStorageGet},
+ SSTORE: {2, Zero},
+ SHA3: {1, GasSha3Base},
+ CREATE: {3, GasCreate},
+ CALL: {7, GasCall},
+ CALLCODE: {7, GasCall},
+ JUMPDEST: {0, GasJumpDest},
+ SUICIDE: {1, Zero},
+ RETURN: {2, Zero},
+}
+
+func baseCheck(op OpCode, stack *Stack, gas *big.Int) {
+ if r, ok := _baseCheck[op]; ok {
+ stack.require(r.stack)
+
+ gas.Add(gas, r.gas)
+ }
+}
+
+func toWordSize(size *big.Int) *big.Int {
+ tmp := new(big.Int)
+ tmp.Add(size, u256(31))
+ tmp.Div(tmp, u256(32))
+ return tmp
+}
+
+func (self *Vm) calculateGasAndSize(context *Context, caller ContextRef, op OpCode, statedb *state.StateDB, mem *Memory, stack *Stack) (*big.Int, *big.Int) {
+ var (
+ gas = new(big.Int)
+ newMemSize *big.Int = new(big.Int)
+ )
+ baseCheck(op, stack, gas)
+
+ // Stack Check, memory resize & gas phase
+ switch op {
+ 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:
+ gas.Set(GasFastestStep)
+ case SWAP1, SWAP2, SWAP3, SWAP4, SWAP5, SWAP6, SWAP7, SWAP8, SWAP9, SWAP10, SWAP11, SWAP12, SWAP13, SWAP14, SWAP15, SWAP16:
+ n := int(op - SWAP1 + 2)
+ stack.require(n)
+ gas.Set(GasFastestStep)
+ case DUP1, DUP2, DUP3, DUP4, DUP5, DUP6, DUP7, DUP8, DUP9, DUP10, DUP11, DUP12, DUP13, DUP14, DUP15, DUP16:
+ n := int(op - DUP1 + 1)
+ stack.require(n)
+ gas.Set(GasFastestStep)
+ case LOG0, LOG1, LOG2, LOG3, LOG4:
+ n := int(op - LOG0)
+ stack.require(n + 2)
+
+ mSize, mStart := stack.Peekn()
+
+ gas.Add(gas, GasLogBase)
+ gas.Add(gas, new(big.Int).Mul(big.NewInt(int64(n)), GasLogTopic))
+ gas.Add(gas, new(big.Int).Mul(mSize, GasLogByte))
+
+ newMemSize = calcMemSize(mStart, mSize)
+ case EXP:
+ gas.Add(gas, new(big.Int).Mul(big.NewInt(int64(len(stack.data[stack.Len()-2].Bytes()))), GasExpByte))
+ case SSTORE:
+ stack.require(2)
+
+ var g *big.Int
+ y, x := stack.Peekn()
+ val := statedb.GetState(context.Address(), x.Bytes())
+ if len(val) == 0 && len(y.Bytes()) > 0 {
+ // 0 => non 0
+ g = GasStorageAdd
+ } else if len(val) > 0 && len(y.Bytes()) == 0 {
+ statedb.Refund(self.env.Origin(), RefundStorage)
+
+ g = GasStorageMod
+ } else {
+ // non 0 => non 0 (or 0 => 0)
+ g = GasStorageMod
+ }
+ gas.Set(g)
+ case MLOAD:
+ newMemSize = calcMemSize(stack.Peek(), u256(32))
+ case MSTORE8:
+ newMemSize = calcMemSize(stack.Peek(), u256(1))
+ case MSTORE:
+ newMemSize = calcMemSize(stack.Peek(), u256(32))
+ case RETURN:
+ newMemSize = calcMemSize(stack.Peek(), stack.data[stack.Len()-2])
+ case SHA3:
+ newMemSize = calcMemSize(stack.Peek(), stack.data[stack.Len()-2])
+
+ words := toWordSize(stack.data[stack.Len()-2])
+ gas.Add(gas, words.Mul(words, GasSha3Word))
+ case CALLDATACOPY:
+ newMemSize = calcMemSize(stack.Peek(), stack.data[stack.Len()-3])
+
+ words := toWordSize(stack.data[stack.Len()-3])
+ gas.Add(gas, words.Mul(words, GasCopyWord))
+ case CODECOPY:
+ newMemSize = calcMemSize(stack.Peek(), stack.data[stack.Len()-3])
+
+ words := toWordSize(stack.data[stack.Len()-3])
+ gas.Add(gas, words.Mul(words, GasCopyWord))
+ case EXTCODECOPY:
+ newMemSize = calcMemSize(stack.data[stack.Len()-2], stack.data[stack.Len()-4])
+
+ words := toWordSize(stack.data[stack.Len()-4])
+ gas.Add(gas, words.Mul(words, GasCopyWord))
+
+ case CREATE:
+ newMemSize = calcMemSize(stack.data[stack.Len()-2], stack.data[stack.Len()-3])
+ case CALL, CALLCODE:
+ gas.Add(gas, stack.data[stack.Len()-1])
+
+ if op == CALL {
+ if self.env.State().GetStateObject(stack.data[stack.Len()-2].Bytes()) == nil {
+ gas.Add(gas, GasCallNewAccount)
+ }
+ }
+
+ if len(stack.data[stack.Len()-3].Bytes()) > 0 {
+ gas.Add(gas, GasCallValueTransfer)
+ }
+
+ x := calcMemSize(stack.data[stack.Len()-6], stack.data[stack.Len()-7])
+ y := calcMemSize(stack.data[stack.Len()-4], stack.data[stack.Len()-5])
+
+ newMemSize = ethutil.BigMax(x, y)
+ }
+
+ if newMemSize.Cmp(ethutil.Big0) > 0 {
+ newMemSizeWords := toWordSize(newMemSize)
+ newMemSize.Mul(newMemSizeWords, u256(32))
+
+ if newMemSize.Cmp(u256(int64(mem.Len()))) > 0 {
+ oldSize := toWordSize(big.NewInt(int64(mem.Len())))
+ pow := new(big.Int).Exp(oldSize, ethutil.Big2, Zero)
+ linCoef := new(big.Int).Mul(oldSize, GasMemWord)
+ quadCoef := new(big.Int).Div(pow, GasQuadCoeffDenom)
+ oldTotalFee := new(big.Int).Add(linCoef, quadCoef)
+
+ pow.Exp(newMemSizeWords, ethutil.Big2, Zero)
+ linCoef = new(big.Int).Mul(newMemSizeWords, GasMemWord)
+ quadCoef = new(big.Int).Div(pow, GasQuadCoeffDenom)
+ newTotalFee := new(big.Int).Add(linCoef, quadCoef)
+
+ gas.Add(gas, new(big.Int).Sub(newTotalFee, oldTotalFee))
+ }
+ }
+
+ return newMemSize, gas
+}
+
+func (self *Vm) RunPrecompiled(p *PrecompiledAccount, callData []byte, context *Context) (ret []byte, err error) {
+ gas := p.Gas(len(callData))
+ if context.UseGas(gas) {
+ ret = p.Call(callData)
+ self.Printf("NATIVE_FUNC => %x", ret)
+ self.Endl()
+
+ return context.Return(ret), nil
+ } else {
+ self.Printf("NATIVE_FUNC => failed").Endl()
+
+ tmp := new(big.Int).Set(context.Gas)
+
+ panic(OOG(gas, tmp).Error())
+ }
+}
+
+func (self *Vm) Printf(format string, v ...interface{}) VirtualMachine {
+ if self.debug {
+ if self.logTy == LogTyPretty {
+ self.logStr += fmt.Sprintf(format, v...)
+ }
+ }
+
+ return self
+}
+
+func (self *Vm) Endl() VirtualMachine {
+ if self.debug {
+ if self.logTy == LogTyPretty {
+ vmlogger.Debugln(self.logStr)
+ self.logStr = ""
+ }
+ }
+
+ return self
+}
+
+func (self *Vm) Env() Environment {
+ return self.env
+}
generated by cgit (git 2.34.1) at 2024-11-15 05:55:36 +0800