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Merge pull request #16387 from karalabe/evm-polsihes

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core: minor evm polishes and optimizations
This commit is contained in:
Péter Szilágyi 2018-03-26 13:44:36 +03:00 committed by GitHub
commit e9a1d8de34
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 109 additions and 103 deletions
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25
core/evm.go
View File

@ -60,13 +60,26 @@ func NewEVMContext(msg Message, header *types.Header, chain ChainContext, author
// GetHashFn returns a GetHashFunc which retrieves header hashes by number
func GetHashFn(ref *types.Header, chain ChainContext) func(n uint64) common.Hash {
return func(n uint64) common.Hash {
for header := chain.GetHeader(ref.ParentHash, ref.Number.Uint64()-1); header != nil; header = chain.GetHeader(header.ParentHash, header.Number.Uint64()-1) {
if header.Number.Uint64() == n {
return header.Hash()
}
}
var cache map[uint64]common.Hash
return func(n uint64) common.Hash {
// If there's no hash cache yet, make one
if cache == nil {
cache = map[uint64]common.Hash{
ref.Number.Uint64() - 1: ref.ParentHash,
}
}
// Try to fulfill the request from the cache
if hash, ok := cache[n]; ok {
return hash
}
// Not cached, iterate the blocks and cache the hashes
for header := chain.GetHeader(ref.ParentHash, ref.Number.Uint64()-1); header != nil; header = chain.GetHeader(header.ParentHash, header.Number.Uint64()-1) {
cache[header.Number.Uint64()-1] = header.ParentHash
if n == header.Number.Uint64()-1 {
return header.ParentHash
}
}
return common.Hash{}
}
}

2
core/headerchain.go
View File

@ -23,6 +23,7 @@ import (
"math"
"math/big"
mrand "math/rand"
"sync/atomic"
"time"
"github.com/ethereum/go-ethereum/common"
@ -32,7 +33,6 @@ import (
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/params"
"github.com/hashicorp/golang-lru"
"sync/atomic"
)
const (

173
core/vm/instructions.go
View File

@ -39,20 +39,18 @@ var (
)
func opAdd(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
x, y := stack.pop(), stack.pop()
stack.push(math.U256(x.Add(x, y)))
evm.interpreter.intPool.put(y)
x, y := stack.pop(), stack.peek()
math.U256(y.Add(x, y))
evm.interpreter.intPool.put(x)
return nil, nil
}
func opSub(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
x, y := stack.pop(), stack.pop()
stack.push(math.U256(x.Sub(x, y)))
evm.interpreter.intPool.put(y)
x, y := stack.pop(), stack.peek()
math.U256(y.Sub(x, y))
evm.interpreter.intPool.put(x)
return nil, nil
}
@ -66,44 +64,39 @@ func opMul(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stac
}
func opDiv(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
x, y := stack.pop(), stack.pop()
x, y := stack.pop(), stack.peek()
if y.Sign() != 0 {
stack.push(math.U256(x.Div(x, y)))
math.U256(y.Div(x, y))
} else {
stack.push(new(big.Int))
y.SetUint64(0)
}
evm.interpreter.intPool.put(y)
evm.interpreter.intPool.put(x)
return nil, nil
}
func opSdiv(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
x, y := math.S256(stack.pop()), math.S256(stack.pop())
if y.Sign() == 0 {
stack.push(new(big.Int))
return nil, nil
res := evm.interpreter.intPool.getZero()
if y.Sign() == 0 || x.Sign() == 0 {
stack.push(res)
} else {
n := new(big.Int)
if evm.interpreter.intPool.get().Mul(x, y).Sign() < 0 {
n.SetInt64(-1)
if x.Sign() != y.Sign() {
res.Div(x.Abs(x), y.Abs(y))
res.Neg(res)
} else {
n.SetInt64(1)
res.Div(x.Abs(x), y.Abs(y))
}
res := x.Div(x.Abs(x), y.Abs(y))
res.Mul(res, n)
stack.push(math.U256(res))
}
evm.interpreter.intPool.put(y)
evm.interpreter.intPool.put(x, y)
return nil, nil
}
func opMod(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
x, y := stack.pop(), stack.pop()
if y.Sign() == 0 {
stack.push(new(big.Int))
stack.push(x.SetUint64(0))
} else {
stack.push(math.U256(x.Mod(x, y)))
}
@ -113,23 +106,20 @@ func opMod(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stac
func opSmod(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
x, y := math.S256(stack.pop()), math.S256(stack.pop())
res := evm.interpreter.intPool.getZero()
if y.Sign() == 0 {
stack.push(new(big.Int))
stack.push(res)
} else {
n := new(big.Int)
if x.Sign() < 0 {
n.SetInt64(-1)
res.Mod(x.Abs(x), y.Abs(y))
res.Neg(res)
} else {
n.SetInt64(1)
res.Mod(x.Abs(x), y.Abs(y))
}
res := x.Mod(x.Abs(x), y.Abs(y))
res.Mul(res, n)
stack.push(math.U256(res))
}
evm.interpreter.intPool.put(y)
evm.interpreter.intPool.put(x, y)
return nil, nil
}
@ -163,32 +153,30 @@ func opSignExtend(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stac
}
func opNot(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
x := stack.pop()
stack.push(math.U256(x.Not(x)))
x := stack.peek()
math.U256(x.Not(x))
return nil, nil
}
func opLt(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
x, y := stack.pop(), stack.pop()
x, y := stack.pop(), stack.peek()
if x.Cmp(y) < 0 {
stack.push(evm.interpreter.intPool.get().SetUint64(1))
y.SetUint64(1)
} else {
stack.push(new(big.Int))
y.SetUint64(0)
}
evm.interpreter.intPool.put(x, y)
evm.interpreter.intPool.put(x)
return nil, nil
}
func opGt(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
x, y := stack.pop(), stack.pop()
x, y := stack.pop(), stack.peek()
if x.Cmp(y) > 0 {
stack.push(evm.interpreter.intPool.get().SetUint64(1))
y.SetUint64(1)
} else {
stack.push(new(big.Int))
y.SetUint64(0)
}
evm.interpreter.intPool.put(x, y)
evm.interpreter.intPool.put(x)
return nil, nil
}
@ -270,18 +258,18 @@ func opAnd(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stac
}
func opOr(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
x, y := stack.pop(), stack.pop()
stack.push(x.Or(x, y))
x, y := stack.pop(), stack.peek()
y.Or(x, y)
evm.interpreter.intPool.put(y)
evm.interpreter.intPool.put(x)
return nil, nil
}
func opXor(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
x, y := stack.pop(), stack.pop()
stack.push(x.Xor(x, y))
x, y := stack.pop(), stack.peek()
y.Xor(x, y)
evm.interpreter.intPool.put(y)
evm.interpreter.intPool.put(x)
return nil, nil
}
@ -300,13 +288,12 @@ func opByte(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Sta
func opAddmod(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
x, y, z := stack.pop(), stack.pop(), stack.pop()
if z.Cmp(bigZero) > 0 {
add := x.Add(x, y)
add.Mod(add, z)
stack.push(math.U256(add))
x.Add(x, y)
x.Mod(x, z)
stack.push(math.U256(x))
} else {
stack.push(new(big.Int))
stack.push(x.SetUint64(0))
}
evm.interpreter.intPool.put(y, z)
return nil, nil
}
@ -314,13 +301,12 @@ func opAddmod(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *S
func opMulmod(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
x, y, z := stack.pop(), stack.pop(), stack.pop()
if z.Cmp(bigZero) > 0 {
mul := x.Mul(x, y)
mul.Mod(mul, z)
stack.push(math.U256(mul))
x.Mul(x, y)
x.Mod(x, z)
stack.push(math.U256(x))
} else {
stack.push(new(big.Int))
stack.push(x.SetUint64(0))
}
evm.interpreter.intPool.put(y, z)
return nil, nil
}
@ -393,8 +379,7 @@ func opSha3(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Sta
if evm.vmConfig.EnablePreimageRecording {
evm.StateDB.AddPreimage(common.BytesToHash(hash), data)
}
stack.push(new(big.Int).SetBytes(hash))
stack.push(evm.interpreter.intPool.get().SetBytes(hash))
evm.interpreter.intPool.put(offset, size)
return nil, nil
@ -406,10 +391,8 @@ func opAddress(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *
}
func opBalance(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
addr := common.BigToAddress(stack.pop())
balance := evm.StateDB.GetBalance(addr)
stack.push(new(big.Int).Set(balance))
slot := stack.peek()
slot.Set(evm.StateDB.GetBalance(common.BigToAddress(slot)))
return nil, nil
}
@ -429,7 +412,7 @@ func opCallValue(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack
}
func opCallDataLoad(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
stack.push(new(big.Int).SetBytes(getDataBig(contract.Input, stack.pop(), big32)))
stack.push(evm.interpreter.intPool.get().SetBytes(getDataBig(contract.Input, stack.pop(), big32)))
return nil, nil
}
@ -460,10 +443,11 @@ func opReturnDataCopy(pc *uint64, evm *EVM, contract *Contract, memory *Memory,
memOffset = stack.pop()
dataOffset = stack.pop()
length = stack.pop()
)
defer evm.interpreter.intPool.put(memOffset, dataOffset, length)
end := new(big.Int).Add(dataOffset, length)
end = evm.interpreter.intPool.get().Add(dataOffset, length)
)
defer evm.interpreter.intPool.put(memOffset, dataOffset, length, end)
if end.BitLen() > 64 || uint64(len(evm.interpreter.returnData)) < end.Uint64() {
return nil, errReturnDataOutOfBounds
}
@ -473,11 +457,8 @@ func opReturnDataCopy(pc *uint64, evm *EVM, contract *Contract, memory *Memory,
}
func opExtCodeSize(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
a := stack.pop()
addr := common.BigToAddress(a)
a.SetInt64(int64(evm.StateDB.GetCodeSize(addr)))
stack.push(a)
slot := stack.peek()
slot.SetUint64(uint64(evm.StateDB.GetCodeSize(common.BigToAddress(slot))))
return nil, nil
}
@ -485,6 +466,7 @@ func opExtCodeSize(pc *uint64, evm *EVM, contract *Contract, memory *Memory, sta
func opCodeSize(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
l := evm.interpreter.intPool.get().SetInt64(int64(len(contract.Code)))
stack.push(l)
return nil, nil
}
@ -527,9 +509,8 @@ func opBlockhash(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack
if num.Cmp(n) > 0 && num.Cmp(evm.BlockNumber) < 0 {
stack.push(evm.GetHash(num.Uint64()).Big())
} else {
stack.push(new(big.Int))
stack.push(evm.interpreter.intPool.getZero())
}
evm.interpreter.intPool.put(num, n)
return nil, nil
}
@ -540,22 +521,22 @@ func opCoinbase(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack
}
func opTimestamp(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
stack.push(math.U256(new(big.Int).Set(evm.Time)))
stack.push(math.U256(evm.interpreter.intPool.get().Set(evm.Time)))
return nil, nil
}
func opNumber(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
stack.push(math.U256(new(big.Int).Set(evm.BlockNumber)))
stack.push(math.U256(evm.interpreter.intPool.get().Set(evm.BlockNumber)))
return nil, nil
}
func opDifficulty(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
stack.push(math.U256(new(big.Int).Set(evm.Difficulty)))
stack.push(math.U256(evm.interpreter.intPool.get().Set(evm.Difficulty)))
return nil, nil
}
func opGasLimit(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
stack.push(math.U256(new(big.Int).SetUint64(evm.GasLimit)))
stack.push(math.U256(evm.interpreter.intPool.get().SetUint64(evm.GasLimit)))
return nil, nil
}
@ -566,7 +547,7 @@ func opPop(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stac
func opMload(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
offset := stack.pop()
val := new(big.Int).SetBytes(memory.Get(offset.Int64(), 32))
val := evm.interpreter.intPool.get().SetBytes(memory.Get(offset.Int64(), 32))
stack.push(val)
evm.interpreter.intPool.put(offset)
@ -670,9 +651,9 @@ func opCreate(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *S
// rule) and treat as an error, if the ruleset is frontier we must
// ignore this error and pretend the operation was successful.
if evm.ChainConfig().IsHomestead(evm.BlockNumber) && suberr == ErrCodeStoreOutOfGas {
stack.push(new(big.Int))
stack.push(evm.interpreter.intPool.getZero())
} else if suberr != nil && suberr != ErrCodeStoreOutOfGas {
stack.push(new(big.Int))
stack.push(evm.interpreter.intPool.getZero())
} else {
stack.push(addr.Big())
}
@ -701,9 +682,9 @@ func opCall(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Sta
}
ret, returnGas, err := evm.Call(contract, toAddr, args, gas, value)
if err != nil {
stack.push(new(big.Int))
stack.push(evm.interpreter.intPool.getZero())
} else {
stack.push(big.NewInt(1))
stack.push(evm.interpreter.intPool.get().SetUint64(1))
}
if err == nil || err == errExecutionReverted {
memory.Set(retOffset.Uint64(), retSize.Uint64(), ret)
@ -730,9 +711,9 @@ func opCallCode(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack
}
ret, returnGas, err := evm.CallCode(contract, toAddr, args, gas, value)
if err != nil {
stack.push(new(big.Int))
stack.push(evm.interpreter.intPool.getZero())
} else {
stack.push(big.NewInt(1))
stack.push(evm.interpreter.intPool.get().SetUint64(1))
}
if err == nil || err == errExecutionReverted {
memory.Set(retOffset.Uint64(), retSize.Uint64(), ret)
@ -755,9 +736,9 @@ func opDelegateCall(pc *uint64, evm *EVM, contract *Contract, memory *Memory, st
ret, returnGas, err := evm.DelegateCall(contract, toAddr, args, gas)
if err != nil {
stack.push(new(big.Int))
stack.push(evm.interpreter.intPool.getZero())
} else {
stack.push(big.NewInt(1))
stack.push(evm.interpreter.intPool.get().SetUint64(1))
}
if err == nil || err == errExecutionReverted {
memory.Set(retOffset.Uint64(), retSize.Uint64(), ret)
@ -780,9 +761,9 @@ func opStaticCall(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stac
ret, returnGas, err := evm.StaticCall(contract, toAddr, args, gas)
if err != nil {
stack.push(new(big.Int))
stack.push(evm.interpreter.intPool.getZero())
} else {
stack.push(big.NewInt(1))
stack.push(evm.interpreter.intPool.get().SetUint64(1))
}
if err == nil || err == errExecutionReverted {
memory.Set(retOffset.Uint64(), retSize.Uint64(), ret)

16
core/vm/intpool.go
View File

@ -32,24 +32,36 @@ func newIntPool() *intPool {
return &intPool{pool: newstack()}
}
// get retrieves a big int from the pool, allocating one if the pool is empty.
// Note, the returned int's value is arbitrary and will not be zeroed!
func (p *intPool) get() *big.Int {
if p.pool.len() > 0 {
return p.pool.pop()
}
return new(big.Int)
}
// getZero retrieves a big int from the pool, setting it to zero or allocating
// a new one if the pool is empty.
func (p *intPool) getZero() *big.Int {
if p.pool.len() > 0 {
return p.pool.pop().SetUint64(0)
}
return new(big.Int)
}
// put returns an allocated big int to the pool to be later reused by get calls.
// Note, the values as saved as is; neither put nor get zeroes the ints out!
func (p *intPool) put(is ...*big.Int) {
if len(p.pool.data) > poolLimit {
return
}
for _, i := range is {
// verifyPool is a build flag. Pool verification makes sure the integrity
// of the integer pool by comparing values to a default value.
if verifyPool {
i.Set(checkVal)
}
p.pool.push(i)
}
}