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-rw-r--r--core/vm/vm.go897
1 files changed, 897 insertions, 0 deletions
diff --git a/core/vm/vm.go b/core/vm/vm.go
new file mode 100644
index 000000000..f4bf1ca72
--- /dev/null
+++ b/core/vm/vm.go
@@ -0,0 +1,897 @@
+package vm
+
+import (
+ "fmt"
+ "math/big"
+
+ "github.com/ethereum/go-ethereum/common"
+ "github.com/ethereum/go-ethereum/crypto"
+ "github.com/ethereum/go-ethereum/core/state"
+)
+
+type Vm struct {
+ env Environment
+
+ logTy byte
+ logStr string
+
+ err error
+ // For logging
+ debug bool
+
+ 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(context *Context, callData []byte) (ret []byte, err error) {
+ self.env.SetDepth(self.env.Depth() + 1)
+ var (
+ caller = context.caller
+ code = context.Code
+ value = context.value
+ price = context.Price
+ )
+
+ self.Printf("(%d) (%x) %x (code=%d) gas: %v (d) %x", self.env.Depth(), caller.Address().Bytes()[:4], context.Address(), len(code), context.Gas, callData).Endl()
+
+ 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 context.CodeAddr != nil {
+ if p := Precompiled[context.CodeAddr.Str()]; p != nil {
+ return self.RunPrecompiled(p, callData, context)
+ }
+ }
+
+ var (
+ op OpCode
+
+ destinations = analyseJumpDests(context.Code)
+ mem = NewMemory()
+ stack = newStack()
+ pc uint64 = 0
+ step = 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 {
+ // 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())
+ 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.pop(), stack.pop()
+ self.Printf(" %v + %v", y, x)
+
+ base.Add(x, y)
+
+ U256(base)
+
+ self.Printf(" = %v", base)
+ // pop result back on the stack
+ stack.push(base)
+ case SUB:
+ x, y := stack.pop(), stack.pop()
+ self.Printf(" %v - %v", y, x)
+
+ base.Sub(x, y)
+
+ U256(base)
+
+ self.Printf(" = %v", base)
+ // pop result back on the stack
+ stack.push(base)
+ case MUL:
+ x, y := stack.pop(), stack.pop()
+ self.Printf(" %v * %v", y, x)
+
+ base.Mul(x, y)
+
+ 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(common.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(common.Big0) == 0 {
+ base.Set(common.Big0)
+ } else {
+ n := new(big.Int)
+ if new(big.Int).Mul(x, y).Cmp(common.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(common.Big0) == 0 {
+ base.Set(common.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(common.Big0) == 0 {
+ base.Set(common.Big0)
+ } else {
+ n := new(big.Int)
+ if x.Cmp(common.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.pop(), stack.pop()
+
+ self.Printf(" %v ** %v", x, y)
+
+ base.Exp(x, y, Pow256)
+
+ U256(base)
+
+ self.Printf(" = %v", base)
+
+ stack.push(base)
+ case SIGNEXTEND:
+ back := stack.pop()
+ if back.Cmp(big.NewInt(31)) < 0 {
+ bit := uint(back.Uint64()*8 + 7)
+ num := stack.pop()
+ mask := new(big.Int).Lsh(common.Big1, bit)
+ mask.Sub(mask, common.Big1)
+ if common.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:
+ stack.push(U256(new(big.Int).Not(stack.pop())))
+ //base.Sub(Pow256, stack.pop()).Sub(base, common.Big1)
+ //base = U256(base)
+ //stack.push(base)
+ case LT:
+ x, y := stack.pop(), stack.pop()
+ self.Printf(" %v < %v", x, y)
+ // x < y
+ if x.Cmp(y) < 0 {
+ stack.push(common.BigTrue)
+ } else {
+ stack.push(common.BigFalse)
+ }
+ case GT:
+ x, y := stack.pop(), stack.pop()
+ self.Printf(" %v > %v", x, y)
+
+ // x > y
+ if x.Cmp(y) > 0 {
+ stack.push(common.BigTrue)
+ } else {
+ stack.push(common.BigFalse)
+ }
+
+ case SLT:
+ x, y := S256(stack.pop()), S256(stack.pop())
+ self.Printf(" %v < %v", x, y)
+ // x < y
+ if x.Cmp(S256(y)) < 0 {
+ stack.push(common.BigTrue)
+ } else {
+ stack.push(common.BigFalse)
+ }
+ case SGT:
+ x, y := S256(stack.pop()), S256(stack.pop())
+ self.Printf(" %v > %v", x, y)
+
+ // x > y
+ if x.Cmp(y) > 0 {
+ stack.push(common.BigTrue)
+ } else {
+ stack.push(common.BigFalse)
+ }
+
+ case EQ:
+ x, y := stack.pop(), stack.pop()
+ self.Printf(" %v == %v", y, x)
+
+ // x == y
+ if x.Cmp(y) == 0 {
+ stack.push(common.BigTrue)
+ } else {
+ stack.push(common.BigFalse)
+ }
+ case ISZERO:
+ x := stack.pop()
+ if x.Cmp(common.BigFalse) > 0 {
+ stack.push(common.BigFalse)
+ } else {
+ stack.push(common.BigTrue)
+ }
+
+ // 0x10 range
+ case AND:
+ x, y := stack.pop(), stack.pop()
+ self.Printf(" %v & %v", y, x)
+
+ stack.push(base.And(x, y))
+ case OR:
+ x, y := stack.pop(), stack.pop()
+ self.Printf(" %v | %v", x, y)
+
+ stack.push(base.Or(x, y))
+ case XOR:
+ x, y := stack.pop(), stack.pop()
+ self.Printf(" %v ^ %v", x, y)
+
+ stack.push(base.Xor(x, y))
+ case BYTE:
+ th, val := stack.pop(), stack.pop()
+
+ if th.Cmp(big.NewInt(32)) < 0 {
+ byt := big.NewInt(int64(common.LeftPadBytes(val.Bytes(), 32)[th.Int64()]))
+
+ base.Set(byt)
+ } else {
+ base.Set(common.BigFalse)
+ }
+
+ self.Printf(" => 0x%x", base.Bytes())
+
+ stack.push(base)
+ case ADDMOD:
+ x := stack.pop()
+ y := stack.pop()
+ z := stack.pop()
+
+ if z.Cmp(Zero) > 0 {
+ add := new(big.Int).Add(x, y)
+ base.Mod(add, z)
+
+ base = 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()
+
+ if z.Cmp(Zero) > 0 {
+ mul := new(big.Int).Mul(x, y)
+ base.Mod(mul, z)
+
+ U256(base)
+ }
+
+ self.Printf(" %v + %v %% %v = %v", x, y, z, base)
+
+ stack.push(base)
+
+ // 0x20 range
+ case SHA3:
+ offset, size := stack.pop(), stack.pop()
+ data := crypto.Sha3(mem.Get(offset.Int64(), size.Int64()))
+
+ stack.push(common.BigD(data))
+
+ self.Printf(" => (%v) %x", size, data)
+ // 0x30 range
+ case ADDRESS:
+ stack.push(common.Bytes2Big(context.Address().Bytes()))
+
+ self.Printf(" => %x", context.Address())
+ case BALANCE:
+ addr := common.BigToAddress(stack.pop())
+ balance := statedb.GetBalance(addr)
+
+ stack.push(balance)
+
+ self.Printf(" => %v (%x)", balance, addr)
+ case ORIGIN:
+ origin := self.env.Origin()
+
+ stack.push(origin.Big())
+
+ self.Printf(" => %x", origin)
+ case CALLER:
+ caller := context.caller.Address()
+ stack.push(common.Bytes2Big(caller.Bytes()))
+
+ 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, common.Big32)
+ length = common.BigMin(length, lenData)
+
+ copy(data, callData[offset.Int64():length.Int64()])
+ }
+
+ self.Printf(" => 0x%x", data)
+
+ stack.push(common.BigD(data))
+ case CALLDATASIZE:
+ l := int64(len(callData))
+ stack.push(big.NewInt(l))
+
+ self.Printf(" => %d", l)
+ case CALLDATACOPY:
+ var (
+ mOff = stack.pop()
+ cOff = stack.pop()
+ l = stack.pop()
+ )
+ data := getData(callData, cOff, l)
+
+ mem.Set(mOff.Uint64(), l.Uint64(), data)
+
+ self.Printf(" => [%v, %v, %v]", mOff, cOff, l)
+ case CODESIZE, EXTCODESIZE:
+ var code []byte
+ if op == EXTCODESIZE {
+ addr := common.BigToAddress(stack.pop())
+
+ 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 {
+ addr := common.BigToAddress(stack.pop())
+ code = statedb.GetCode(addr)
+ } else {
+ code = context.Code
+ }
+
+ var (
+ mOff = stack.pop()
+ cOff = stack.pop()
+ l = stack.pop()
+ )
+
+ codeCopy := getData(code, cOff, l)
+
+ mem.Set(mOff.Uint64(), l.Uint64(), 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(), common.Big257)
+ if num.Cmp(n) > 0 && num.Cmp(self.env.BlockNumber()) < 0 {
+ stack.push(self.env.GetHash(num.Uint64()).Big())
+ } else {
+ stack.push(common.Big0)
+ }
+
+ self.Printf(" => 0x%x", stack.peek().Bytes())
+ case COINBASE:
+ coinbase := self.env.Coinbase()
+
+ stack.push(coinbase.Big())
+
+ 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(common.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.dup(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)
+ stack.swap(n)
+
+ self.Printf(" => [%d]", n)
+ case LOG0, LOG1, LOG2, LOG3, LOG4:
+ n := int(op - LOG0)
+ topics := make([]common.Hash, n)
+ mStart, mSize := stack.pop(), stack.pop()
+ for i := 0; i < n; i++ {
+ topics[i] = common.BigToHash(stack.pop()) //common.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 := common.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
+ mStart, val := stack.pop(), stack.pop()
+ mem.Set(mStart.Uint64(), 32, common.BigToBytes(val, 256))
+
+ self.Printf(" => 0x%x", val)
+ case MSTORE8:
+ off, val := stack.pop().Int64(), stack.pop().Int64()
+
+ mem.store[off] = byte(val & 0xff)
+
+ self.Printf(" => [%v] 0x%x", off, mem.store[off])
+ case SLOAD:
+ loc := common.BigToHash(stack.pop())
+ val := common.Bytes2Big(statedb.GetState(context.Address(), loc))
+ stack.push(val)
+
+ self.Printf(" {0x%x : 0x%x}", loc, val.Bytes())
+ case SSTORE:
+ loc := common.BigToHash(stack.pop())
+ val := stack.pop()
+
+ statedb.SetState(context.Address(), loc, val)
+
+ self.Printf(" {0x%x : 0x%x}", loc, val.Bytes())
+ case JUMP:
+ jump(pc, stack.pop())
+
+ continue
+ case JUMPI:
+ pos, cond := stack.pop(), stack.pop()
+
+ if cond.Cmp(common.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()
+ offset, size = stack.pop(), stack.pop()
+ input = mem.Get(offset.Int64(), size.Int64())
+ gas = new(big.Int).Set(context.Gas)
+ addr common.Address
+ )
+ self.Endl()
+
+ context.UseGas(context.Gas)
+ ret, suberr, ref := self.env.Create(context, nil, input, gas, price, value)
+ if suberr != nil {
+ stack.push(common.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(addr.Big())
+
+ }
+
+ case CALL, CALLCODE:
+ gas := stack.pop()
+ // pop gas and value of the stack.
+ addr, value := stack.pop(), stack.pop()
+ value = U256(value)
+ // pop input size and offset
+ inOffset, inSize := stack.pop(), stack.pop()
+ // pop return size and offset
+ retOffset, retSize := stack.pop(), stack.pop()
+
+ address := common.BigToAddress(addr)
+ 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(common.BigFalse)
+
+ self.Printf("%v").Endl()
+ } else {
+ stack.push(common.BigTrue)
+
+ mem.Set(retOffset.Uint64(), retSize.Uint64(), ret)
+ }
+ self.Printf("resume %x (%v)", context.Address(), context.Gas)
+ case RETURN:
+ offset, size := stack.pop(), stack.pop()
+ 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(common.BigToAddress(stack.pop()))
+ balance := statedb.GetBalance(context.Address())
+
+ self.Printf(" => (%x) %v", receiver.Address().Bytes()[:4], balance)
+
+ receiver.AddBalance(balance)
+
+ statedb.Delete(context.Address())
+
+ fallthrough
+ case STOP: // Stop the context
+ self.Endl()
+
+ return context.Return(nil), nil
+ default:
+ self.Printf("(pc) %-3v Invalid opcode %x\n", pc, op).Endl()
+
+ panic(fmt.Errorf("Invalid opcode %x", op))
+ }
+
+ pc++
+
+ self.Endl()
+ }
+}
+
+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.data[stack.len()-2], stack.data[stack.len()-1]
+
+ 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.data[stack.len()-2], stack.data[stack.len()-1]
+ val := statedb.GetState(context.Address(), common.BigToHash(x))
+ 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 SUICIDE:
+ if !statedb.IsDeleted(context.Address()) {
+ statedb.Refund(self.env.Origin(), RefundSuicide)
+ }
+ 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(common.BigToAddress(stack.data[stack.len()-2])) == 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 = common.BigMax(x, y)
+ }
+
+ if newMemSize.Cmp(common.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, common.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, common.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.Infoln(self.logStr)
+ self.logStr = ""
+ }
+ }
+
+ return self
+}
+
+func (self *Vm) Env() Environment {
+ return self.env
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-23 21:48:48 +0800