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-rw-r--r--core/vm/gas_table.go418
1 files changed, 124 insertions, 294 deletions
diff --git a/core/vm/gas_table.go b/core/vm/gas_table.go
index fba1eb066..4d2c4e94a 100644
--- a/core/vm/gas_table.go
+++ b/core/vm/gas_table.go
@@ -1,80 +1,56 @@
package vm
import (
- gmath "math"
"math/big"
"github.com/ethereum/go-ethereum/common"
- "github.com/ethereum/go-ethereum/common/math"
"github.com/ethereum/go-ethereum/params"
)
-// memoryGasCosts calculates the quadratic gas for memory expansion. It does so
-// only for the memory region that is expanded, not the total memory.
-func memoryGasCost(mem *Memory, newMemSize uint64) (uint64, error) {
- // The maximum that will fit in a uint64 is max_word_count - 1
- // anything above that will result in an overflow.
- if newMemSize > gmath.MaxUint64-32 {
- return 0, errGasUintOverflow
- }
-
- if newMemSize == 0 {
- return 0, nil
- }
-
- newMemSizeWords := toWordSize(newMemSize)
- newMemSize = newMemSizeWords * 32
-
- if newMemSize > uint64(mem.Len()) {
- square := newMemSizeWords * newMemSizeWords
- linCoef := newMemSizeWords * params.MemoryGas
- quadCoef := square / params.QuadCoeffDiv
- newTotalFee := linCoef + quadCoef
-
- fee := newTotalFee - mem.lastGasCost
- mem.lastGasCost = newTotalFee
-
- return fee, nil
+func memoryGasCost(mem *Memory, newMemSize *big.Int) *big.Int {
+ gas := new(big.Int)
+ if newMemSize.Cmp(common.Big0) > 0 {
+ newMemSizeWords := toWordSize(newMemSize)
+
+ if newMemSize.Cmp(u256(int64(mem.Len()))) > 0 {
+ // be careful reusing variables here when changing.
+ // The order has been optimised to reduce allocation
+ oldSize := toWordSize(big.NewInt(int64(mem.Len())))
+ pow := new(big.Int).Exp(oldSize, common.Big2, Zero)
+ linCoef := oldSize.Mul(oldSize, params.MemoryGas)
+ quadCoef := new(big.Int).Div(pow, params.QuadCoeffDiv)
+ oldTotalFee := new(big.Int).Add(linCoef, quadCoef)
+
+ pow.Exp(newMemSizeWords, common.Big2, Zero)
+ linCoef = linCoef.Mul(newMemSizeWords, params.MemoryGas)
+ quadCoef = quadCoef.Div(pow, params.QuadCoeffDiv)
+ newTotalFee := linCoef.Add(linCoef, quadCoef)
+
+ fee := newTotalFee.Sub(newTotalFee, oldTotalFee)
+ gas.Add(gas, fee)
+ }
}
- return 0, nil
+ return gas
}
-func constGasFunc(gas uint64) gasFunc {
- return func(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
- return gas, nil
+func constGasFunc(gas *big.Int) gasFunc {
+ return func(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
+ return gas
}
}
-func gasCalldataCopy(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
- gas, err := memoryGasCost(mem, memorySize)
- if err != nil {
- return 0, err
- }
-
- var overflow bool
- if gas, overflow = math.SafeAdd(gas, GasFastestStep); overflow {
- return 0, errGasUintOverflow
- }
+func gasCalldataCopy(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
+ gas := memoryGasCost(mem, memorySize)
+ gas.Add(gas, GasFastestStep)
+ words := toWordSize(stack.Back(2))
- words, overflow := bigUint64(stack.Back(2))
- if overflow {
- return 0, errGasUintOverflow
- }
-
- if words, overflow = math.SafeMul(toWordSize(words), params.CopyGas); overflow {
- return 0, errGasUintOverflow
- }
-
- if gas, overflow = math.SafeAdd(gas, words); overflow {
- return 0, errGasUintOverflow
- }
- return gas, nil
+ return gas.Add(gas, words.Mul(words, params.CopyGas))
}
-func gasSStore(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
+func gasSStore(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
var (
y, x = stack.Back(1), stack.Back(0)
- val = evm.StateDB.GetState(contract.Address(), common.BigToHash(x))
+ val = env.StateDB.GetState(contract.Address(), common.BigToHash(x))
)
// This checks for 3 scenario's and calculates gas accordingly
// 1. From a zero-value address to a non-zero value (NEW VALUE)
@@ -82,335 +58,189 @@ func gasSStore(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, m
// 3. From a non-zero to a non-zero (CHANGE)
if common.EmptyHash(val) && !common.EmptyHash(common.BigToHash(y)) {
// 0 => non 0
- return params.SstoreSetGas, nil
+ return new(big.Int).Set(params.SstoreSetGas)
} else if !common.EmptyHash(val) && common.EmptyHash(common.BigToHash(y)) {
- evm.StateDB.AddRefund(new(big.Int).SetUint64(params.SstoreRefundGas))
+ env.StateDB.AddRefund(params.SstoreRefundGas)
- return params.SstoreClearGas, nil
+ return new(big.Int).Set(params.SstoreClearGas)
} else {
// non 0 => non 0 (or 0 => 0)
- return params.SstoreResetGas, nil
+ return new(big.Int).Set(params.SstoreResetGas)
}
}
-func makeGasLog(n uint64) gasFunc {
- return func(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
- requestedSize, overflow := bigUint64(stack.Back(1))
- if overflow {
- return 0, errGasUintOverflow
- }
+func makeGasLog(n uint) gasFunc {
+ return func(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
+ mSize := stack.Back(1)
- gas, err := memoryGasCost(mem, memorySize)
- if err != nil {
- return 0, err
- }
-
- if gas, overflow = math.SafeAdd(gas, params.LogGas); overflow {
- return 0, errGasUintOverflow
- }
- if gas, overflow = math.SafeAdd(gas, n*params.LogTopicGas); overflow {
- return 0, errGasUintOverflow
- }
-
- var memorySizeGas uint64
- if memorySizeGas, overflow = math.SafeMul(requestedSize, params.LogDataGas); overflow {
- return 0, errGasUintOverflow
- }
- if gas, overflow = math.SafeAdd(gas, memorySizeGas); overflow {
- return 0, errGasUintOverflow
- }
- return gas, nil
+ gas := new(big.Int).Add(memoryGasCost(mem, memorySize), params.LogGas)
+ gas.Add(gas, new(big.Int).Mul(big.NewInt(int64(n)), params.LogTopicGas))
+ gas.Add(gas, new(big.Int).Mul(mSize, params.LogDataGas))
+ return gas
}
}
-func gasSha3(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
- var overflow bool
- gas, err := memoryGasCost(mem, memorySize)
- if err != nil {
- return 0, err
- }
-
- if gas, overflow = math.SafeAdd(gas, params.Sha3Gas); overflow {
- return 0, errGasUintOverflow
- }
-
- wordGas, overflow := bigUint64(stack.Back(1))
- if overflow {
- return 0, errGasUintOverflow
- }
- if wordGas, overflow = math.SafeMul(toWordSize(wordGas), params.Sha3WordGas); overflow {
- return 0, errGasUintOverflow
- }
- if gas, overflow = math.SafeAdd(gas, wordGas); overflow {
- return 0, errGasUintOverflow
- }
- return gas, nil
+func gasSha3(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
+ gas := memoryGasCost(mem, memorySize)
+ gas.Add(gas, params.Sha3Gas)
+ words := toWordSize(stack.Back(1))
+ return gas.Add(gas, words.Mul(words, params.Sha3WordGas))
}
-func gasCodeCopy(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
- gas, err := memoryGasCost(mem, memorySize)
- if err != nil {
- return 0, err
- }
-
- var overflow bool
- if gas, overflow = math.SafeAdd(gas, GasFastestStep); overflow {
- return 0, errGasUintOverflow
- }
+func gasCodeCopy(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
+ gas := memoryGasCost(mem, memorySize)
+ gas.Add(gas, GasFastestStep)
+ words := toWordSize(stack.Back(2))
- wordGas, overflow := bigUint64(stack.Back(2))
- if overflow {
- return 0, errGasUintOverflow
- }
- if wordGas, overflow = math.SafeMul(toWordSize(wordGas), params.CopyGas); overflow {
- return 0, errGasUintOverflow
- }
- if gas, overflow = math.SafeAdd(gas, wordGas); overflow {
- return 0, errGasUintOverflow
- }
- return gas, nil
+ return gas.Add(gas, words.Mul(words, params.CopyGas))
}
-func gasExtCodeCopy(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
- gas, err := memoryGasCost(mem, memorySize)
- if err != nil {
- return 0, err
- }
-
- var overflow bool
- if gas, overflow = math.SafeAdd(gas, gt.ExtcodeCopy); overflow {
- return 0, errGasUintOverflow
- }
-
- wordGas, overflow := bigUint64(stack.Back(3))
- if overflow {
- return 0, errGasUintOverflow
- }
-
- if wordGas, overflow = math.SafeMul(toWordSize(wordGas), params.CopyGas); overflow {
- return 0, errGasUintOverflow
- }
+func gasExtCodeCopy(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
+ gas := memoryGasCost(mem, memorySize)
+ gas.Add(gas, gt.ExtcodeCopy)
+ words := toWordSize(stack.Back(3))
- if gas, overflow = math.SafeAdd(gas, wordGas); overflow {
- return 0, errGasUintOverflow
- }
- return gas, nil
+ return gas.Add(gas, words.Mul(words, params.CopyGas))
}
-func gasMLoad(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
- var overflow bool
- gas, err := memoryGasCost(mem, memorySize)
- if err != nil {
- return 0, errGasUintOverflow
- }
- if gas, overflow = math.SafeAdd(gas, GasFastestStep); overflow {
- return 0, errGasUintOverflow
- }
- return gas, nil
+func gasMLoad(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
+ return new(big.Int).Add(GasFastestStep, memoryGasCost(mem, memorySize))
}
-func gasMStore8(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
- var overflow bool
- gas, err := memoryGasCost(mem, memorySize)
- if err != nil {
- return 0, errGasUintOverflow
- }
- if gas, overflow = math.SafeAdd(gas, GasFastestStep); overflow {
- return 0, errGasUintOverflow
- }
- return gas, nil
+func gasMStore8(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
+ return new(big.Int).Add(GasFastestStep, memoryGasCost(mem, memorySize))
}
-func gasMStore(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
- var overflow bool
- gas, err := memoryGasCost(mem, memorySize)
- if err != nil {
- return 0, errGasUintOverflow
- }
- if gas, overflow = math.SafeAdd(gas, GasFastestStep); overflow {
- return 0, errGasUintOverflow
- }
- return gas, nil
+func gasMStore(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
+ return new(big.Int).Add(GasFastestStep, memoryGasCost(mem, memorySize))
}
-func gasCreate(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
- var overflow bool
- gas, err := memoryGasCost(mem, memorySize)
- if err != nil {
- return 0, err
- }
- if gas, overflow = math.SafeAdd(gas, params.CreateGas); overflow {
- return 0, errGasUintOverflow
- }
- return gas, nil
+func gasCreate(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
+ return new(big.Int).Add(params.CreateGas, memoryGasCost(mem, memorySize))
}
-func gasBalance(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
- return gt.Balance, nil
+func gasBalance(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
+ return gt.Balance
}
-func gasExtCodeSize(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
- return gt.ExtcodeSize, nil
+func gasExtCodeSize(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
+ return gt.ExtcodeSize
}
-func gasSLoad(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
- return gt.SLoad, nil
+func gasSLoad(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
+ return gt.SLoad
}
-func gasExp(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
- expByteLen := uint64((stack.data[stack.len()-2].BitLen() + 7) / 8)
-
- var (
- gas = expByteLen * gt.ExpByte // no overflow check required. Max is 256 * ExpByte gas
- overflow bool
- )
- if gas, overflow = math.SafeAdd(gas, GasSlowStep); overflow {
- return 0, errGasUintOverflow
- }
- return gas, nil
+func gasExp(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
+ expByteLen := int64((stack.data[stack.len()-2].BitLen() + 7) / 8)
+ gas := big.NewInt(expByteLen)
+ gas.Mul(gas, gt.ExpByte)
+ return gas.Add(gas, GasSlowStep)
}
-func gasCall(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
+func gasCall(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
+ gas := new(big.Int).Set(gt.Calls)
+
+ transfersValue := stack.Back(2).BitLen() > 0
var (
- gas = gt.Calls
- transfersValue = stack.Back(2).BitLen() > 0
- address = common.BigToAddress(stack.Back(1))
- eip158 = evm.ChainConfig().IsEIP158(evm.BlockNumber)
+ address = common.BigToAddress(stack.Back(1))
+ eip158 = env.ChainConfig().IsEIP158(env.BlockNumber)
)
if eip158 {
- if evm.StateDB.Empty(address) && transfersValue {
- gas += params.CallNewAccountGas
+ if env.StateDB.Empty(address) && transfersValue {
+ gas.Add(gas, params.CallNewAccountGas)
}
- } else if !evm.StateDB.Exist(address) {
- gas += params.CallNewAccountGas
+ } else if !env.StateDB.Exist(address) {
+ gas.Add(gas, params.CallNewAccountGas)
}
if transfersValue {
- gas += params.CallValueTransferGas
- }
- memoryGas, err := memoryGasCost(mem, memorySize)
- if err != nil {
- return 0, err
- }
- var overflow bool
- if gas, overflow = math.SafeAdd(gas, memoryGas); overflow {
- return 0, errGasUintOverflow
+ gas.Add(gas, params.CallValueTransferGas)
}
+ gas.Add(gas, memoryGasCost(mem, memorySize))
- cg, err := callGas(gt, contract.Gas, gas, stack.Back(0))
- if err != nil {
- return 0, err
- }
+ cg := callGas(gt, contract.Gas, gas, stack.data[stack.len()-1])
// Replace the stack item with the new gas calculation. This means that
// either the original item is left on the stack or the item is replaced by:
// (availableGas - gas) * 63 / 64
// We replace the stack item so that it's available when the opCall instruction is
// called. This information is otherwise lost due to the dependency on *current*
// available gas.
- stack.data[stack.len()-1] = new(big.Int).SetUint64(cg)
+ stack.data[stack.len()-1] = cg
- if gas, overflow = math.SafeAdd(gas, cg); overflow {
- return 0, errGasUintOverflow
- }
- return gas, nil
+ return gas.Add(gas, cg)
}
-func gasCallCode(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
- gas := gt.Calls
+func gasCallCode(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
+ gas := new(big.Int).Set(gt.Calls)
if stack.Back(2).BitLen() > 0 {
- gas += params.CallValueTransferGas
- }
- memoryGas, err := memoryGasCost(mem, memorySize)
- if err != nil {
- return 0, err
- }
- var overflow bool
- if gas, overflow = math.SafeAdd(gas, memoryGas); overflow {
- return 0, errGasUintOverflow
+ gas.Add(gas, params.CallValueTransferGas)
}
+ gas.Add(gas, memoryGasCost(mem, memorySize))
- cg, err := callGas(gt, contract.Gas, gas, stack.Back(0))
- if err != nil {
- return 0, err
- }
+ cg := callGas(gt, contract.Gas, gas, stack.data[stack.len()-1])
// Replace the stack item with the new gas calculation. This means that
// either the original item is left on the stack or the item is replaced by:
// (availableGas - gas) * 63 / 64
// We replace the stack item so that it's available when the opCall instruction is
// called. This information is otherwise lost due to the dependency on *current*
// available gas.
- stack.data[stack.len()-1] = new(big.Int).SetUint64(cg)
+ stack.data[stack.len()-1] = cg
- if gas, overflow = math.SafeAdd(gas, cg); overflow {
- return 0, errGasUintOverflow
- }
- return gas, nil
+ return gas.Add(gas, cg)
}
-func gasReturn(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
+func gasReturn(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
return memoryGasCost(mem, memorySize)
}
-func gasSuicide(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
- var gas uint64
+func gasSuicide(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
+ gas := new(big.Int)
// EIP150 homestead gas reprice fork:
- if evm.ChainConfig().IsEIP150(evm.BlockNumber) {
- gas = gt.Suicide
+ if env.ChainConfig().IsEIP150(env.BlockNumber) {
+ gas.Set(gt.Suicide)
var (
address = common.BigToAddress(stack.Back(0))
- eip158 = evm.ChainConfig().IsEIP158(evm.BlockNumber)
+ eip158 = env.ChainConfig().IsEIP158(env.BlockNumber)
)
if eip158 {
// if empty and transfers value
- if evm.StateDB.Empty(address) && evm.StateDB.GetBalance(contract.Address()).BitLen() > 0 {
- gas += gt.CreateBySuicide
+ if env.StateDB.Empty(address) && env.StateDB.GetBalance(contract.Address()).BitLen() > 0 {
+ gas.Add(gas, gt.CreateBySuicide)
}
- } else if !evm.StateDB.Exist(address) {
- gas += gt.CreateBySuicide
+ } else if !env.StateDB.Exist(address) {
+ gas.Add(gas, gt.CreateBySuicide)
}
}
- if !evm.StateDB.HasSuicided(contract.Address()) {
- evm.StateDB.AddRefund(new(big.Int).SetUint64(params.SuicideRefundGas))
+ if !env.StateDB.HasSuicided(contract.Address()) {
+ env.StateDB.AddRefund(params.SuicideRefundGas)
}
- return gas, nil
+ return gas
}
-func gasDelegateCall(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
- gas, err := memoryGasCost(mem, memorySize)
- if err != nil {
- return 0, err
- }
- var overflow bool
- if gas, overflow = math.SafeAdd(gas, gt.Calls); overflow {
- return 0, errGasUintOverflow
- }
+func gasDelegateCall(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
+ gas := new(big.Int).Add(gt.Calls, memoryGasCost(mem, memorySize))
- cg, err := callGas(gt, contract.Gas, gas, stack.Back(0))
- if err != nil {
- return 0, err
- }
+ cg := callGas(gt, contract.Gas, gas, stack.data[stack.len()-1])
// Replace the stack item with the new gas calculation. This means that
// either the original item is left on the stack or the item is replaced by:
// (availableGas - gas) * 63 / 64
// We replace the stack item so that it's available when the opCall instruction is
// called.
- stack.data[stack.len()-1] = new(big.Int).SetUint64(cg)
+ stack.data[stack.len()-1] = cg
- if gas, overflow = math.SafeAdd(gas, cg); overflow {
- return 0, errGasUintOverflow
- }
- return gas, nil
+ return gas.Add(gas, cg)
}
-func gasPush(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
- return GasFastestStep, nil
+func gasPush(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
+ return GasFastestStep
}
-func gasSwap(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
- return GasFastestStep, nil
+func gasSwap(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
+ return GasFastestStep
}
-func gasDup(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
- return GasFastestStep, nil
+func gasDup(gt params.GasTable, env *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize *big.Int) *big.Int {
+ return GasFastestStep
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-24 20:39:24 +0800