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core/vm: use uint256 in EVM implementation (#20787)

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* core/vm: use fixed uint256 library instead of big

* core/vm: remove intpools

* core/vm: upgrade uint256, fixes uint256.NewFromBig

* core/vm: use uint256.Int by value in Stack

* core/vm: upgrade uint256 to v1.0.0

* core/vm: don't preallocate space for 1024 stack items (only 16)

Co-authored-by: Martin Holst Swende <martin@swende.se>
This commit is contained in:
Paweł Bylica
2020-06-08 14:24:40 +02:00
committed by GitHub
parent 39abd92ca8
commit cf6674539c
21 changed files with 359 additions and 704 deletions
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26
core/vm/gas_table.go
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@ -70,7 +70,7 @@ func memoryCopierGas(stackpos int) gasFunc {
return 0, err
}
// And gas for copying data, charged per word at param.CopyGas
words, overflow := bigUint64(stack.Back(stackpos))
words, overflow := stack.Back(stackpos).Uint64WithOverflow()
if overflow {
return 0, ErrGasUintOverflow
}
@ -96,7 +96,7 @@ var (
func gasSStore(evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
var (
y, x = stack.Back(1), stack.Back(0)
current = evm.StateDB.GetState(contract.Address(), common.BigToHash(x))
current = evm.StateDB.GetState(contract.Address(), common.Hash(x.Bytes32()))
)
// The legacy gas metering only takes into consideration the current state
// Legacy rules should be applied if we are in Petersburg (removal of EIP-1283)
@ -131,11 +131,11 @@ func gasSStore(evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySi
// 2.2.2. If original value equals new value (this storage slot is reset)
// 2.2.2.1. If original value is 0, add 19800 gas to refund counter.
// 2.2.2.2. Otherwise, add 4800 gas to refund counter.
value := common.BigToHash(y)
value := common.Hash(y.Bytes32())
if current == value { // noop (1)
return params.NetSstoreNoopGas, nil
}
original := evm.StateDB.GetCommittedState(contract.Address(), common.BigToHash(x))
original := evm.StateDB.GetCommittedState(contract.Address(), common.Hash(x.Bytes32()))
if original == current {
if original == (common.Hash{}) { // create slot (2.1.1)
return params.NetSstoreInitGas, nil
@ -183,14 +183,14 @@ func gasSStoreEIP2200(evm *EVM, contract *Contract, stack *Stack, mem *Memory, m
// Gas sentry honoured, do the actual gas calculation based on the stored value
var (
y, x = stack.Back(1), stack.Back(0)
current = evm.StateDB.GetState(contract.Address(), common.BigToHash(x))
current = evm.StateDB.GetState(contract.Address(), common.Hash(x.Bytes32()))
)
value := common.BigToHash(y)
value := common.Hash(y.Bytes32())
if current == value { // noop (1)
return params.SstoreNoopGasEIP2200, nil
}
original := evm.StateDB.GetCommittedState(contract.Address(), common.BigToHash(x))
original := evm.StateDB.GetCommittedState(contract.Address(), common.Hash(x.Bytes32()))
if original == current {
if original == (common.Hash{}) { // create slot (2.1.1)
return params.SstoreInitGasEIP2200, nil
@ -219,7 +219,7 @@ func gasSStoreEIP2200(evm *EVM, contract *Contract, stack *Stack, mem *Memory, m
func makeGasLog(n uint64) gasFunc {
return func(evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
requestedSize, overflow := bigUint64(stack.Back(1))
requestedSize, overflow := stack.Back(1).Uint64WithOverflow()
if overflow {
return 0, ErrGasUintOverflow
}
@ -252,7 +252,7 @@ func gasSha3(evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize
if err != nil {
return 0, err
}
wordGas, overflow := bigUint64(stack.Back(1))
wordGas, overflow := stack.Back(1).Uint64WithOverflow()
if overflow {
return 0, ErrGasUintOverflow
}
@ -286,7 +286,7 @@ func gasCreate2(evm *EVM, contract *Contract, stack *Stack, mem *Memory, memoryS
if err != nil {
return 0, err
}
wordGas, overflow := bigUint64(stack.Back(2))
wordGas, overflow := stack.Back(2).Uint64WithOverflow()
if overflow {
return 0, ErrGasUintOverflow
}
@ -328,8 +328,8 @@ func gasExpEIP158(evm *EVM, contract *Contract, stack *Stack, mem *Memory, memor
func gasCall(evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
var (
gas uint64
transfersValue = stack.Back(2).Sign() != 0
address = common.BigToAddress(stack.Back(1))
transfersValue = !stack.Back(2).IsZero()
address = common.Address(stack.Back(1).Bytes20())
)
if evm.chainRules.IsEIP158 {
if transfersValue && evm.StateDB.Empty(address) {
@ -422,7 +422,7 @@ func gasSelfdestruct(evm *EVM, contract *Contract, stack *Stack, mem *Memory, me
// EIP150 homestead gas reprice fork:
if evm.chainRules.IsEIP150 {
gas = params.SelfdestructGasEIP150
var address = common.BigToAddress(stack.Back(0))
var address = common.Address(stack.Back(0).Bytes20())
if evm.chainRules.IsEIP158 {
// if empty and transfers value