mirror
/
go-ethereum
mirror of https://github.com/ethereum/go-ethereum
2
0
Fork 1
Code Issues Releases Wiki Activity

JitVM: the EVM JIT bridge

Browse Source
pull/270/head
Paweł Bylica 10 years ago
parent 4df2e1ef5c
commit d5f38f5690
4 changed files with 375 additions and 18 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Show Stats Download Patch File Download Diff File
  1. 2
      .gitignore
  2. 18
      tests/vm/gh_test.go
  3. 363
      vm/vm_jit.go
  4. 10
      vm/vm_jit_fake.go

2
.gitignore vendored
Unescape View File

@ -15,3 +15,5 @@
.#*
*#
*~
.project
.settings

18
tests/vm/gh_test.go
Unescape View File

@ -172,47 +172,47 @@ func RunVmTest(p string, t *testing.T) {
// I've created a new function for each tests so it's easier to identify where the problem lies if any of them fail.
func TestVMArithmetic(t *testing.T) {
const fn = "../files/vmtests/vmArithmeticTest.json"
const fn = "../files/VMTests/vmArithmeticTest.json"
RunVmTest(fn, t)
}
func TestBitwiseLogicOperation(t *testing.T) {
const fn = "../files/vmtests/vmBitwiseLogicOperationTest.json"
const fn = "../files/VMTests/vmBitwiseLogicOperationTest.json"
RunVmTest(fn, t)
}
func TestBlockInfo(t *testing.T) {
const fn = "../files/vmtests/vmBlockInfoTest.json"
const fn = "../files/VMTests/vmBlockInfoTest.json"
RunVmTest(fn, t)
}
func TestEnvironmentalInfo(t *testing.T) {
const fn = "../files/vmtests/vmEnvironmentalInfoTest.json"
const fn = "../files/VMTests/vmEnvironmentalInfoTest.json"
RunVmTest(fn, t)
}
func TestFlowOperation(t *testing.T) {
const fn = "../files/vmtests/vmIOandFlowOperationsTest.json"
const fn = "../files/VMTests/vmIOandFlowOperationsTest.json"
RunVmTest(fn, t)
}
func TestPushDupSwap(t *testing.T) {
const fn = "../files/vmtests/vmPushDupSwapTest.json"
const fn = "../files/VMTests/vmPushDupSwapTest.json"
RunVmTest(fn, t)
}
func TestVMSha3(t *testing.T) {
const fn = "../files/vmtests/vmSha3Test.json"
const fn = "../files/VMTests/vmSha3Test.json"
RunVmTest(fn, t)
}
func TestVm(t *testing.T) {
const fn = "../files/vmtests/vmtests.json"
const fn = "../files/VMTests/vmtests.json"
RunVmTest(fn, t)
}
func TestVmLog(t *testing.T) {
const fn = "../files/vmtests/vmLogTest.json"
const fn = "../files/VMTests/vmLogTest.json"
RunVmTest(fn, t)
}

363
vm/vm_jit.go
Unescape View File

@ -1,31 +1,376 @@
// +build evmjit
package vm
import "math/big"
/*
#include <stdint.h>
#include <stdlib.h>
struct evmjit_result
{
int32_t returnCode;
uint64_t returnDataSize;
void* returnData;
};
struct evmjit_result evmjit_run(void* _data, void* _env);
#cgo LDFLAGS: -levmjit
*/
import "C"
import (
"bytes"
"errors"
"fmt"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/state"
"math/big"
"unsafe"
)
type JitVm struct {
env Environment
backup *Vm
env Environment
me ContextRef
callerAddr []byte
price *big.Int
data RuntimeData
}
type i256 [32]byte
const (
Gas = iota
address
Caller
Origin
CallValue
CallDataSize
GasPrice
CoinBase
TimeStamp
Number
Difficulty
GasLimit
CodeSize
_size
ReturnDataOffset = CallValue // Reuse 2 fields for return data reference
ReturnDataSize = CallDataSize
SuicideDestAddress = address ///< Suicide balance destination address
)
type RuntimeData struct {
elems [_size]i256
callData *byte
code *byte
}
func hash2llvm(h []byte) i256 {
var m i256
copy(m[len(m)-len(h):], h) // right aligned copy
return m
}
func llvm2hash(m *i256) []byte {
if len(m) != 32 {
panic("I don't know Go!")
}
return C.GoBytes(unsafe.Pointer(m), 32)
}
func address2llvm(addr []byte) i256 {
n := hash2llvm(addr)
bswap(&n)
return n
}
func bswap(m *i256) *i256 {
for i, l := 0, len(m); i < l/2; i++ {
m[i], m[l-i-1] = m[l-i-1], m[i]
}
return m
}
func trim(m []byte) []byte {
skip := 0
for i := 0; i < len(m); i++ {
if m[i] == 0 {
skip++
} else {
break
}
}
return m[skip:]
}
func getDataPtr(m []byte) *byte {
var p *byte
if len(m) > 0 {
p = &m[0]
}
return p
}
func big2llvm(n *big.Int) i256 {
m := hash2llvm(n.Bytes())
bswap(&m)
return m
}
func llvm2big(m *i256) *big.Int {
n := big.NewInt(0)
for i := 0; i < len(m); i++ {
b := big.NewInt(int64(m[i]))
b.Lsh(b, uint(i)*8)
n.Add(n, b)
}
return n
}
func llvm2bytes(data *byte, length uint64) []byte {
if length == 0 {
return nil
}
if data == nil {
panic("llvm2bytes: nil pointer to data")
}
return (*[1 << 30]byte)(unsafe.Pointer(data))[:length:length]
}
func untested(condition bool, message string) {
if condition {
panic("Condition `" + message + "` tested. Remove assert.")
}
}
func assert(condition bool, message string) {
if !condition {
panic("Assert `" + message + "` failed!")
}
}
func NewJitVm(env Environment) *JitVm {
backupVm := New(env)
return &JitVm{env: env, backup: backupVm}
return &JitVm{env: env}
}
func (self *JitVm) Run(me, caller ContextRef, code []byte, value, gas, price *big.Int, callData []byte) (ret []byte, err error) {
return self.backup.Run(me, caller, code, value, gas, price, callData)
self.env.SetDepth(self.env.Depth() + 1)
if Precompiled[string(me.Address())] != nil {
// if it's address of precopiled contract
// fallback to standard VM
stdVm := New(self.env)
return stdVm.Run(me, caller, code, value, gas, price, callData)
}
self.me = me // FIXME: Make sure Run() is not used more than once
self.callerAddr = caller.Address()
self.price = price
self.data.elems[Gas] = big2llvm(gas)
self.data.elems[address] = address2llvm(self.me.Address())
self.data.elems[Caller] = address2llvm(caller.Address())
self.data.elems[Origin] = address2llvm(self.env.Origin())
self.data.elems[CallValue] = big2llvm(value)
self.data.elems[CallDataSize] = big2llvm(big.NewInt(int64(len(callData)))) // TODO: Keep call data size as i64
self.data.elems[GasPrice] = big2llvm(price)
self.data.elems[CoinBase] = address2llvm(self.env.Coinbase())
self.data.elems[TimeStamp] = big2llvm(big.NewInt(self.env.Time())) // TODO: Keep timestamp as i64
self.data.elems[Number] = big2llvm(self.env.BlockNumber())
self.data.elems[Difficulty] = big2llvm(self.env.Difficulty())
self.data.elems[GasLimit] = big2llvm(self.env.GasLimit())
self.data.elems[CodeSize] = big2llvm(big.NewInt(int64(len(code)))) // TODO: Keep code size as i64
self.data.callData = getDataPtr(callData)
self.data.code = getDataPtr(code)
result := C.evmjit_run(unsafe.Pointer(&self.data), unsafe.Pointer(self))
//fmt.Printf("JIT result: %d\n", r)
if result.returnCode >= 100 {
err = errors.New("OOG from JIT")
gas.SetInt64(0) // Set gas to 0, JIT does not bother
} else {
gasLeft := llvm2big(&self.data.elems[Gas]) // TODO: Set value directly to gas instance
gas.Set(gasLeft)
if result.returnCode == 1 { // RETURN
ret = C.GoBytes(result.returnData, C.int(result.returnDataSize))
C.free(result.returnData)
} else if result.returnCode == 2 { // SUICIDE
state := self.Env().State()
receiverAddr := llvm2hash(bswap(&self.data.elems[address]))
receiverAddr = trim(receiverAddr) // TODO: trim all zeros or subslice 160bits?
receiver := state.GetOrNewStateObject(receiverAddr)
balance := state.GetBalance(me.Address())
receiver.AddAmount(balance)
state.Delete(me.Address())
}
}
return
}
func (self *JitVm) Printf(format string, v ...interface{}) VirtualMachine {
return self.backup.Printf(format, v)
return self
}
func (self *JitVm) Endl() VirtualMachine {
return self.backup.Endl()
return self
}
func (self *JitVm) Env() Environment {
return self.env
}
//go is nice
//export env_sha3
func env_sha3(dataPtr unsafe.Pointer, length uint64, resultPtr unsafe.Pointer) {
data := C.GoBytes(dataPtr, C.int(length))
hash := crypto.Sha3(data)
result := (*i256)(resultPtr)
*result = hash2llvm(hash)
}
//export env_sstore
func env_sstore(vmPtr unsafe.Pointer, indexPtr unsafe.Pointer, valuePtr unsafe.Pointer) {
vm := (*JitVm)(vmPtr)
index := llvm2hash(bswap((*i256)(indexPtr)))
value := llvm2hash(bswap((*i256)(valuePtr)))
value = trim(value)
if len(value) == 0 {
prevValue := vm.env.State().GetState(vm.me.Address(), index)
if len(prevValue) != 0 {
vm.Env().State().Refund(vm.callerAddr, GasSStoreRefund)
}
}
vm.env.State().SetState(vm.me.Address(), index, value)
}
//export env_sload
func env_sload(vmPtr unsafe.Pointer, indexPtr unsafe.Pointer, resultPtr unsafe.Pointer) {
vm := (*JitVm)(vmPtr)
index := llvm2hash(bswap((*i256)(indexPtr)))
value := vm.env.State().GetState(vm.me.Address(), index)
result := (*i256)(resultPtr)
*result = hash2llvm(value)
bswap(result)
}
//export env_balance
func env_balance(_vm unsafe.Pointer, _addr unsafe.Pointer, _result unsafe.Pointer) {
vm := (*JitVm)(_vm)
addr := llvm2hash((*i256)(_addr))
balance := vm.Env().State().GetBalance(addr)
result := (*i256)(_result)
*result = big2llvm(balance)
}
//export env_blockhash
func env_blockhash(_vm unsafe.Pointer, _number unsafe.Pointer, _result unsafe.Pointer) {
vm := (*JitVm)(_vm)
number := llvm2big((*i256)(_number))
result := (*i256)(_result)
currNumber := vm.Env().BlockNumber()
limit := big.NewInt(0).Sub(currNumber, big.NewInt(256))
if number.Cmp(limit) >= 0 && number.Cmp(currNumber) < 0 {
hash := vm.Env().GetHash(uint64(number.Int64()))
*result = hash2llvm(hash)
} else {
*result = i256{}
}
}
//export env_call
func env_call(_vm unsafe.Pointer, _gas unsafe.Pointer, _receiveAddr unsafe.Pointer, _value unsafe.Pointer, inDataPtr unsafe.Pointer, inDataLen uint64, outDataPtr *byte, outDataLen uint64, _codeAddr unsafe.Pointer) bool {
vm := (*JitVm)(_vm)
//fmt.Printf("env_call (depth %d)\n", vm.Env().Depth())
defer func() {
if r := recover(); r != nil {
fmt.Printf("Recovered in env_call (depth %d, out %p %d): %s\n", vm.Env().Depth(), outDataPtr, outDataLen, r)
}
}()
balance := vm.Env().State().GetBalance(vm.me.Address())
value := llvm2big((*i256)(_value))
if balance.Cmp(value) >= 0 {
receiveAddr := llvm2hash((*i256)(_receiveAddr))
inData := C.GoBytes(inDataPtr, C.int(inDataLen))
outData := llvm2bytes(outDataPtr, outDataLen)
codeAddr := llvm2hash((*i256)(_codeAddr))
llvmGas := (*i256)(_gas)
gas := llvm2big(llvmGas)
var out []byte
var err error
if bytes.Equal(codeAddr, receiveAddr) {
out, err = vm.env.Call(vm.me, codeAddr, inData, gas, vm.price, value)
} else {
out, err = vm.env.CallCode(vm.me, codeAddr, inData, gas, vm.price, value)
}
*llvmGas = big2llvm(gas)
if err == nil {
copy(outData, out)
return true
}
}
return false
}
//export env_create
func env_create(_vm unsafe.Pointer, _gas unsafe.Pointer, _value unsafe.Pointer, initDataPtr unsafe.Pointer, initDataLen uint64, _result unsafe.Pointer) {
vm := (*JitVm)(_vm)
value := llvm2big((*i256)(_value))
initData := C.GoBytes(initDataPtr, C.int(initDataLen)) // TODO: Unnecessary if low balance
result := (*i256)(_result)
*result = i256{}
llvmGas := (*i256)(_gas)
gas := llvm2big(llvmGas)
ret, suberr, ref := vm.env.Create(vm.me, nil, initData, gas, vm.price, value)
if suberr == nil {
dataGas := big.NewInt(int64(len(ret))) // TODO: Nto the best design. env.Create can do it, it has the reference to gas counter
dataGas.Mul(dataGas, GasCreateByte)
gas.Sub(gas, dataGas)
*result = hash2llvm(ref.Address())
}
*llvmGas = big2llvm(gas)
}
//export env_log
func env_log(_vm unsafe.Pointer, dataPtr unsafe.Pointer, dataLen uint64, _topic1 unsafe.Pointer, _topic2 unsafe.Pointer, _topic3 unsafe.Pointer, _topic4 unsafe.Pointer) {
vm := (*JitVm)(_vm)
data := C.GoBytes(dataPtr, C.int(dataLen))
topics := make([][]byte, 0, 4)
if _topic1 != nil {
topics = append(topics, llvm2hash((*i256)(_topic1)))
}
if _topic2 != nil {
topics = append(topics, llvm2hash((*i256)(_topic2)))
}
if _topic3 != nil {
topics = append(topics, llvm2hash((*i256)(_topic3)))
}
if _topic4 != nil {
topics = append(topics, llvm2hash((*i256)(_topic4)))
}
vm.Env().AddLog(state.NewLog(vm.me.Address(), topics, data))
}
//export env_extcode
func env_extcode(_vm unsafe.Pointer, _addr unsafe.Pointer, o_size *uint64) *byte {
vm := (*JitVm)(_vm)
addr := llvm2hash((*i256)(_addr))
code := vm.Env().State().GetCode(addr)
*o_size = uint64(len(code))
return getDataPtr(code)
}

10
vm/vm_jit_fake.go
Unescape View File

@ -0,0 +1,10 @@
// +build !evmjit
package vm
import "fmt"
func NewJitVm(env Environment) VirtualMachine {
fmt.Printf("Warning! EVM JIT not enabled.\n")
return New(env)
}
Write Preview
Loading…
Cancel
Save