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Moved execution from vm to chain. 

This moves call and create to the specified environments. Vms are no
longer re-used. Vm uses environment's Call(Code) and Create in order to
execute new contracts or transfer value between accounts.

State transition now uses the same mechanism described above.
This commit is contained in:
obscuren 2014-12-03 17:06:54 +01:00
parent 8240550187
commit 99853ac3ce
12 changed files with 226 additions and 1090 deletions
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80
chain/execution.go Normal file
View File

@ -0,0 +1,80 @@
package chain
import (
"fmt"
"math/big"
"github.com/ethereum/go-ethereum/ethutil"
"github.com/ethereum/go-ethereum/state"
"github.com/ethereum/go-ethereum/vm"
)
type Execution struct {
vm vm.VirtualMachine
address, input []byte
Gas, price, value *big.Int
object *state.StateObject
SkipTransfer bool
}
func NewExecution(vm vm.VirtualMachine, address, input []byte, gas, gasPrice, value *big.Int) *Execution {
return &Execution{vm: vm, address: address, input: input, Gas: gas, price: gasPrice, value: value}
}
func (self *Execution) Addr() []byte {
return self.address
}
func (self *Execution) Call(codeAddr []byte, caller vm.ClosureRef) ([]byte, error) {
// Retrieve the executing code
code := self.vm.Env().State().GetCode(codeAddr)
return self.exec(code, codeAddr, caller)
}
func (self *Execution) exec(code, caddr []byte, caller vm.ClosureRef) (ret []byte, err error) {
env := self.vm.Env()
chainlogger.Debugf("pre state %x\n", env.State().Root())
snapshot := env.State().Copy()
defer func() {
if vm.IsDepthErr(err) || vm.IsOOGErr(err) {
env.State().Set(snapshot)
}
chainlogger.Debugf("post state %x\n", env.State().Root())
}()
from, to := env.State().GetStateObject(caller.Address()), env.State().GetOrNewStateObject(self.address)
// Skipping transfer is used on testing for the initial call
if !self.SkipTransfer {
err = env.Transfer(from, to, self.value)
}
if err != nil {
caller.ReturnGas(self.Gas, self.price)
err = fmt.Errorf("Insufficient funds to transfer value. Req %v, has %v", self.value, from.Balance)
} else {
self.object = to
// Pre-compiled contracts (address.go) 1, 2 & 3.
naddr := ethutil.BigD(caddr).Uint64()
if p := vm.Precompiled[naddr]; p != nil {
if self.Gas.Cmp(p.Gas) >= 0 {
ret = p.Call(self.input)
self.vm.Printf("NATIVE_FUNC(%x) => %x", naddr, ret)
self.vm.Endl()
}
} else {
ret, err = self.vm.Run(to, caller, code, self.value, self.Gas, self.price, self.input)
}
}
return
}
func (self *Execution) Create(caller vm.ClosureRef) (ret []byte, err error, account *state.StateObject) {
ret, err = self.exec(self.input, nil, caller)
account = self.vm.Env().State().GetStateObject(self.address)
return
}

117
chain/state_transition.go
View File

@ -169,120 +169,21 @@ func (self *StateTransition) TransitionState() (err error) {
return
}
if sender.Balance().Cmp(self.value) < 0 {
return fmt.Errorf("Insufficient funds to transfer value. Req %v, has %v", self.value, sender.Balance)
}
var snapshot *state.State
// If the receiver is nil it's a contract (\0*32).
var ret []byte
vmenv := NewEnv(self.state, self.tx, self.block)
var ref vm.ClosureRef
if tx.CreatesContract() {
// Subtract the (irreversible) amount from the senders account
sender.SubAmount(self.value)
self.rec = MakeContract(tx, self.state)
snapshot = self.state.Copy()
// Create a new state object for the contract
receiver = MakeContract(tx, self.state)
self.rec = receiver
if receiver == nil {
return fmt.Errorf("Unable to create contract")
}
// Add the amount to receivers account which should conclude this transaction
receiver.AddAmount(self.value)
ret, err, ref = vmenv.Create(sender, receiver.Address(), self.tx.Data, self.gas, self.gasPrice, self.value)
ref.SetCode(ret)
} else {
receiver = self.Receiver()
// Subtract the amount from the senders account
sender.SubAmount(self.value)
// Add the amount to receivers account which should conclude this transaction
receiver.AddAmount(self.value)
snapshot = self.state.Copy()
ret, err = vmenv.Call(self.Sender(), self.Receiver().Address(), self.tx.Data, self.gas, self.gasPrice, self.value)
}
msg := self.state.Manifest().AddMessage(&state.Message{
To: receiver.Address(), From: sender.Address(),
Input: self.tx.Data,
Origin: sender.Address(),
Block: self.block.Hash(), Timestamp: self.block.Time, Coinbase: self.block.Coinbase, Number: self.block.Number,
Value: self.value,
})
// Process the init code and create 'valid' contract
if types.IsContractAddr(self.receiver) {
// Evaluate the initialization script
// and use the return value as the
// script section for the state object.
self.data = nil
code, evmerr := self.Eval(msg, receiver.Init(), receiver)
if evmerr != nil {
self.state.Set(snapshot)
statelogger.Debugf("Error during init execution %v", evmerr)
}
receiver.Code = code
msg.Output = code
} else {
if len(receiver.Code) > 0 {
ret, evmerr := self.Eval(msg, receiver.Code, receiver)
if evmerr != nil {
self.state.Set(snapshot)
statelogger.Debugf("Error during code execution %v", evmerr)
}
msg.Output = ret
}
if err != nil {
statelogger.Debugln(err)
}
/*
* XXX The following _should_ replace the above transaction
* execution (also for regular calls. Will replace / test next
* phase
*/
/*
// Execute transaction
if tx.CreatesContract() {
self.rec = MakeContract(tx, self.state)
}
address := self.Receiver().Address()
evm := vm.New(NewEnv(state, self.tx, self.block), vm.DebugVmTy)
exe := NewExecution(evm, address, self.tx.Data, self.gas, self.gas.Price, self.tx.Value)
ret, err := msg.Exec(address, self.Sender())
if err != nil {
statelogger.Debugln(err)
} else {
if tx.CreatesContract() {
self.Receiver().Code = ret
}
msg.Output = ret
}
*/
// Add default LOG. Default = big(sender.addr) + 1
//addr := ethutil.BigD(receiver.Address())
//self.state.AddLog(&state.Log{ethutil.U256(addr.Add(addr, ethutil.Big1)).Bytes(), [][]byte{sender.Address()}, nil})
return
}
func (self *StateTransition) Eval(msg *state.Message, script []byte, context *state.StateObject) (ret []byte, err error) {
var (
transactor = self.Sender()
state = self.state
env = NewEnv(state, self.tx, self.block)
callerClosure = vm.NewClosure(msg, transactor, context, script, self.gas, self.gasPrice)
)
evm := vm.New(env, vm.DebugVmTy)
// TMP this will change in the refactor
callerClosure.SetExecution(vm.NewExecution(evm, nil, nil, nil, nil, self.tx.Value))
ret, _, err = callerClosure.Call(evm, self.tx.Data)
return
}

23
chain/vm_env.go
View File

@ -12,6 +12,7 @@ type VMEnv struct {
state *state.State
block *types.Block
tx *types.Transaction
depth int
}
func NewEnv(state *state.State, tx *types.Transaction, block *types.Block) *VMEnv {
@ -32,9 +33,31 @@ func (self *VMEnv) BlockHash() []byte { return self.block.Hash() }
func (self *VMEnv) Value() *big.Int { return self.tx.Value }
func (self *VMEnv) State() *state.State { return self.state }
func (self *VMEnv) GasLimit() *big.Int { return self.block.GasLimit }
func (self *VMEnv) Depth() int { return self.depth }
func (self *VMEnv) SetDepth(i int) { self.depth = i }
func (self *VMEnv) AddLog(log *state.Log) {
self.state.AddLog(log)
}
func (self *VMEnv) Transfer(from, to vm.Account, amount *big.Int) error {
return vm.Transfer(from, to, amount)
}
func (self *VMEnv) vm(addr, data []byte, gas, price, value *big.Int) *Execution {
evm := vm.New(self, vm.DebugVmTy)
return NewExecution(evm, addr, data, gas, price, value)
}
func (self *VMEnv) Call(me vm.ClosureRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error) {
exe := self.vm(addr, data, gas, price, value)
return exe.Call(addr, me)
}
func (self *VMEnv) CallCode(me vm.ClosureRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error) {
exe := self.vm(me.Address(), data, gas, price, value)
return exe.Call(addr, me)
}
func (self *VMEnv) Create(me vm.ClosureRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error, vm.ClosureRef) {
exe := self.vm(addr, data, gas, price, value)
return exe.Create(me)
}

9
state/state_object.go
View File

@ -276,15 +276,14 @@ func (c *StateObject) Init() Code {
return c.InitCode
}
// To satisfy ClosureRef
func (self *StateObject) Object() *StateObject {
return self
}
func (self *StateObject) Root() []byte {
return self.State.Trie.GetRoot()
}
func (self *StateObject) SetCode(code []byte) {
self.Code = code
}
//
// Encoding
//

70
tests/helper/vm.go
View File

@ -3,6 +3,7 @@ package helper
import (
"math/big"
"github.com/ethereum/go-ethereum/chain"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethutil"
"github.com/ethereum/go-ethereum/state"
@ -10,7 +11,10 @@ import (
)
type Env struct {
state *state.State
depth int
state *state.State
skipTransfer bool
Gas *big.Int
origin []byte
parent []byte
@ -56,33 +60,71 @@ func (self *Env) GasLimit() *big.Int { return self.gasLimit }
func (self *Env) AddLog(log *state.Log) {
self.logs = append(self.logs, log)
}
func (self *Env) Depth() int { return self.depth }
func (self *Env) SetDepth(i int) { self.depth = i }
func (self *Env) Transfer(from, to vm.Account, amount *big.Int) error {
return vm.Transfer(from, to, amount)
}
func (self *Env) vm(addr, data []byte, gas, price, value *big.Int) *chain.Execution {
evm := vm.New(self, vm.DebugVmTy)
exec := chain.NewExecution(evm, addr, data, gas, price, value)
exec.SkipTransfer = self.skipTransfer
return exec
}
func (self *Env) Call(caller vm.ClosureRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error) {
exe := self.vm(addr, data, gas, price, value)
ret, err := exe.Call(addr, caller)
self.Gas = exe.Gas
return ret, err
}
func (self *Env) CallCode(caller vm.ClosureRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error) {
exe := self.vm(caller.Address(), data, gas, price, value)
return exe.Call(addr, caller)
}
func (self *Env) Create(caller vm.ClosureRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error, vm.ClosureRef) {
exe := self.vm(addr, data, gas, price, value)
return exe.Create(caller)
}
func RunVm(state *state.State, env, exec map[string]string) ([]byte, state.Logs, *big.Int, error) {
address := FromHex(exec["address"])
caller := state.GetOrNewStateObject(FromHex(exec["caller"]))
var (
to = FromHex(exec["address"])
from = FromHex(exec["caller"])
data = FromHex(exec["data"])
gas = ethutil.Big(exec["gas"])
price = ethutil.Big(exec["gasPrice"])
value = ethutil.Big(exec["value"])
)
caller := state.GetOrNewStateObject(from)
vmenv := NewEnvFromMap(state, env, exec)
evm := vm.New(vmenv, vm.DebugVmTy)
execution := vm.NewExecution(evm, address, FromHex(exec["data"]), ethutil.Big(exec["gas"]), ethutil.Big(exec["gasPrice"]), ethutil.Big(exec["value"]))
execution.SkipTransfer = true
ret, err := execution.Exec(address, caller)
vmenv.skipTransfer = true
ret, err := vmenv.Call(caller, to, data, gas, price, value)
return ret, vmenv.logs, execution.Gas, err
return ret, vmenv.logs, vmenv.Gas, err
}
func RunState(state *state.State, env, tx map[string]string) ([]byte, state.Logs, *big.Int, error) {
address := FromHex(tx["to"])
keyPair, _ := crypto.NewKeyPairFromSec([]byte(ethutil.Hex2Bytes(tx["secretKey"])))
var (
keyPair, _ = crypto.NewKeyPairFromSec([]byte(ethutil.Hex2Bytes(tx["secretKey"])))
to = FromHex(tx["to"])
data = FromHex(tx["data"])
gas = ethutil.Big(tx["gasLimit"])
price = ethutil.Big(tx["gasPrice"])
value = ethutil.Big(tx["value"])
)
caller := state.GetOrNewStateObject(keyPair.Address())
vmenv := NewEnvFromMap(state, env, tx)
vmenv.origin = caller.Address()
evm := vm.New(vmenv, vm.DebugVmTy)
execution := vm.NewExecution(evm, address, FromHex(tx["data"]), ethutil.Big(tx["gasLimit"]), ethutil.Big(tx["gasPrice"]), ethutil.Big(tx["value"]))
ret, err := execution.Exec(address, caller)
ret, err := vmenv.Call(caller, to, data, gas, price, value)
return ret, vmenv.logs, execution.Gas, err
return ret, vmenv.logs, vmenv.Gas, err
}

140
tests/vm/gh_test.go
View File

@ -1,147 +1,12 @@
package vm
<<<<<<< HEAD
// import (
// "bytes"
// "testing"
// "github.com/ethereum/go-ethereum/ethutil"
// "github.com/ethereum/go-ethereum/state"
// "github.com/ethereum/go-ethereum/tests/helper"
// )
// type Account struct {
// Balance string
// Code string
// Nonce string
// Storage map[string]string
// }
// func StateObjectFromAccount(addr string, account Account) *state.StateObject {
// obj := state.NewStateObject(ethutil.Hex2Bytes(addr))
// obj.SetBalance(ethutil.Big(account.Balance))
// if ethutil.IsHex(account.Code) {
// account.Code = account.Code[2:]
// }
// obj.Code = ethutil.Hex2Bytes(account.Code)
// obj.Nonce = ethutil.Big(account.Nonce).Uint64()
// return obj
// }
// type VmTest struct {
// Callcreates interface{}
// Env map[string]string
// Exec map[string]string
// Gas string
// Out string
// Post map[string]Account
// Pre map[string]Account
// }
// func RunVmTest(p string, t *testing.T) {
// tests := make(map[string]VmTest)
// helper.CreateFileTests(t, p, &tests)
// for name, test := range tests {
// state := state.New(helper.NewTrie())
// for addr, account := range test.Pre {
// obj := StateObjectFromAccount(addr, account)
// state.SetStateObject(obj)
// }
// ret, gas, err := helper.RunVm(state, test.Env, test.Exec)
// // When an error is returned it doesn't always mean the tests fails.
// // Have to come up with some conditional failing mechanism.
// if err != nil {
// t.Errorf("%s", err)
// helper.Log.Infoln(err)
// }
// rexp := helper.FromHex(test.Out)
// if bytes.Compare(rexp, ret) != 0 {
// t.Errorf("%s's return failed. Expected %x, got %x\n", name, rexp, ret)
// }
// gexp := ethutil.Big(test.Gas)
// if gexp.Cmp(gas) != 0 {
// t.Errorf("%s's gas failed. Expected %v, got %v\n", name, gexp, gas)
// }
// for addr, account := range test.Post {
// obj := state.GetStateObject(helper.FromHex(addr))
// for addr, value := range account.Storage {
// v := obj.GetState(helper.FromHex(addr)).Bytes()
// vexp := helper.FromHex(value)
// if bytes.Compare(v, vexp) != 0 {
// t.Errorf("%s's : (%x: %s) storage failed. Expected %x, got %x (%v %v)\n", name, obj.Address()[0:4], addr, vexp, v, ethutil.BigD(vexp), ethutil.BigD(v))
// }
// }
// }
// }
// }
// // 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) {
// //helper.Logger.SetLogLevel(5)
// const fn = "../files/vmtests/vmArithmeticTest.json"
// RunVmTest(fn, t)
// }
// /*
// deleted?
// func TestVMSystemOperation(t *testing.T) {
// helper.Logger.SetLogLevel(5)
// const fn = "../files/vmtests/vmSystemOperationsTest.json"
// RunVmTest(fn, t)
// }
// */
// func TestBitwiseLogicOperation(t *testing.T) {
// const fn = "../files/vmtests/vmBitwiseLogicOperationTest.json"
// RunVmTest(fn, t)
// }
// func TestBlockInfo(t *testing.T) {
// const fn = "../files/vmtests/vmBlockInfoTest.json"
// RunVmTest(fn, t)
// }
// func TestEnvironmentalInfo(t *testing.T) {
// const fn = "../files/vmtests/vmEnvironmentalInfoTest.json"
// RunVmTest(fn, t)
// }
// func TestFlowOperation(t *testing.T) {
// helper.Logger.SetLogLevel(5)
// const fn = "../files/vmtests/vmIOandFlowOperationsTest.json"
// RunVmTest(fn, t)
// }
// func TestPushDupSwap(t *testing.T) {
// const fn = "../files/vmtests/vmPushDupSwapTest.json"
// RunVmTest(fn, t)
// }
// func TestVMSha3(t *testing.T) {
// const fn = "../files/vmtests/vmSha3Test.json"
// RunVmTest(fn, t)
// }
// func TestVm(t *testing.T) {
// const fn = "../files/vmtests/vmtests.json"
// RunVmTest(fn, t)
// }
=======
import (
"bytes"
"math/big"
"strconv"
"testing"
"github.com/ethereum/go-ethereum/chain"
"github.com/ethereum/go-ethereum/chain/types"
"github.com/ethereum/go-ethereum/ethutil"
"github.com/ethereum/go-ethereum/state"
"github.com/ethereum/go-ethereum/tests/helper"
@ -263,7 +128,7 @@ func RunVmTest(p string, t *testing.T) {
}
if len(test.Logs) > 0 {
genBloom := ethutil.LeftPadBytes(chain.LogsBloom(logs).Bytes(), 64)
genBloom := ethutil.LeftPadBytes(types.LogsBloom(logs).Bytes(), 64)
// Logs within the test itself aren't correct, missing empty fields (32 0s)
for bloom /*logs*/, _ := range test.Logs {
if !bytes.Equal(genBloom, ethutil.Hex2Bytes(bloom)) {
@ -339,4 +204,3 @@ func TestStateSpecialTest(t *testing.T) {
const fn = "../files/StateTests/stSpecialTest.json"
RunVmTest(fn, t)
}
>>>>>>> develop

21
vm/closure.go
View File

@ -12,7 +12,7 @@ import (
type ClosureRef interface {
ReturnGas(*big.Int, *big.Int)
Address() []byte
Object() *state.StateObject
SetCode([]byte)
GetStorage(*big.Int) *ethutil.Value
SetStorage(*big.Int, *ethutil.Value)
}
@ -20,10 +20,9 @@ type ClosureRef interface {
// Basic inline closure object which implement the 'closure' interface
type Closure struct {
caller ClosureRef
object *state.StateObject
object ClosureRef
Code []byte
message *state.Message
exe *Execution
Gas, UsedGas, Price *big.Int
@ -31,7 +30,7 @@ type Closure struct {
}
// Create a new closure for the given data items
func NewClosure(msg *state.Message, caller ClosureRef, object *state.StateObject, code []byte, gas, price *big.Int) *Closure {
func NewClosure(msg *state.Message, caller ClosureRef, object ClosureRef, code []byte, gas, price *big.Int) *Closure {
c := &Closure{message: msg, caller: caller, object: object, Code: code, Args: nil}
// Gas should be a pointer so it can safely be reduced through the run
@ -89,6 +88,10 @@ func (c *Closure) Gets(x, y *big.Int) *ethutil.Value {
return ethutil.NewValue(partial)
}
func (self *Closure) SetCode(code []byte) {
self.Code = code
}
func (c *Closure) SetStorage(x *big.Int, val *ethutil.Value) {
c.object.SetStorage(x, val)
}
@ -97,6 +100,7 @@ func (c *Closure) Address() []byte {
return c.object.Address()
}
/*
func (c *Closure) Call(vm VirtualMachine, args []byte) ([]byte, *big.Int, error) {
c.Args = args
@ -104,6 +108,7 @@ func (c *Closure) Call(vm VirtualMachine, args []byte) ([]byte, *big.Int, error)
return ret, c.UsedGas, err
}
*/
func (c *Closure) Return(ret []byte) []byte {
// Return the remaining gas to the caller
@ -131,14 +136,6 @@ func (c *Closure) ReturnGas(gas, price *big.Int) {
c.UsedGas.Sub(c.UsedGas, gas)
}
func (c *Closure) Object() *state.StateObject {
return c.object
}
func (c *Closure) Caller() ClosureRef {
return c.caller
}
func (self *Closure) SetExecution(exe *Execution) {
self.exe = exe
}

11
vm/environment.go
View File

@ -21,6 +21,13 @@ type Environment interface {
GasLimit() *big.Int
Transfer(from, to Account, amount *big.Int) error
AddLog(*state.Log)
Depth() int
SetDepth(i int)
Call(me ClosureRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error)
CallCode(me ClosureRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error)
Create(me ClosureRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error, ClosureRef)
}
type Object interface {
@ -43,9 +50,5 @@ func Transfer(from, to Account, amount *big.Int) error {
from.SubBalance(amount)
to.AddBalance(amount)
// Add default LOG. Default = big(sender.addr) + 1
//addr := ethutil.BigD(receiver.Address())
//tx.addLog(vm.Log{sender.Address(), [][]byte{ethutil.U256(addr.Add(addr, ethutil.Big1)).Bytes()}, nil})
return nil
}

96
vm/execution.go
View File

@ -1,96 +0,0 @@
package vm
import (
"fmt"
"math/big"
"github.com/ethereum/go-ethereum/ethutil"
"github.com/ethereum/go-ethereum/state"
)
type Execution struct {
vm VirtualMachine
address, input []byte
Gas, price, value *big.Int
object *state.StateObject
SkipTransfer bool
}
func NewExecution(vm VirtualMachine, address, input []byte, gas, gasPrice, value *big.Int) *Execution {
return &Execution{vm: vm, address: address, input: input, Gas: gas, price: gasPrice, value: value}
}
func (self *Execution) Addr() []byte {
return self.address
}
func (self *Execution) Exec(codeAddr []byte, caller ClosureRef) ([]byte, error) {
// Retrieve the executing code
code := self.vm.Env().State().GetCode(codeAddr)
return self.exec(code, codeAddr, caller)
}
func (self *Execution) exec(code, caddr []byte, caller ClosureRef) (ret []byte, err error) {
env := self.vm.Env()
vmlogger.Debugf("pre state %x\n", env.State().Root())
snapshot := env.State().Copy()
defer func() {
if IsDepthErr(err) || IsOOGErr(err) {
env.State().Set(snapshot)
}
vmlogger.Debugf("post state %x\n", env.State().Root())
}()
msg := env.State().Manifest().AddMessage(&state.Message{
To: self.address, From: caller.Address(),
Input: self.input,
Origin: env.Origin(),
Block: env.BlockHash(), Timestamp: env.Time(), Coinbase: env.Coinbase(), Number: env.BlockNumber(),
Value: self.value,
})
from, to := caller.Object(), env.State().GetOrNewStateObject(self.address)
// Skipping transfer is used on testing for the initial call
if !self.SkipTransfer {
err = env.Transfer(from, to, self.value)
}
if err != nil {
caller.ReturnGas(self.Gas, self.price)
err = fmt.Errorf("Insufficient funds to transfer value. Req %v, has %v", self.value, from.Balance)
} else {
self.object = to
// Pre-compiled contracts (address.go) 1, 2 & 3.
naddr := ethutil.BigD(caddr).Uint64()
if p := Precompiled[naddr]; p != nil {
if self.Gas.Cmp(p.Gas) >= 0 {
ret = p.Call(self.input)
self.vm.Printf("NATIVE_FUNC(%x) => %x", naddr, ret)
self.vm.Endl()
}
} else {
// Create a new callable closure
c := NewClosure(msg, caller, to, code, self.Gas, self.price)
c.exe = self
if self.vm.Depth() == MaxCallDepth {
c.UseGas(self.Gas)
return c.Return(nil), DepthError{}
}
// Executer the closure and get the return value (if any)
ret, _, err = c.Call(self.vm, self.input)
msg.Output = ret
}
}
return
}
func (self *Execution) Create(caller ClosureRef) (ret []byte, err error) {
return self.exec(self.input, nil, caller)
}

4
vm/virtual_machine.go
View File

@ -1,8 +1,10 @@
package vm
import "math/big"
type VirtualMachine interface {
Env() Environment
RunClosure(*Closure) ([]byte, error)
Run(me, caller ClosureRef, code []byte, value, gas, price *big.Int, data []byte) ([]byte, error)
Depth() int
Printf(string, ...interface{}) VirtualMachine
Endl() VirtualMachine

690
vm/vm.go
View File

@ -1,12 +1,6 @@
package vm
import (
"fmt"
"math/big"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethutil"
)
import "math/big"
// BIG FAT WARNING. THIS VM IS NOT YET IS USE!
// I want to get all VM tests pass first before updating this VM
@ -26,686 +20,8 @@ func New(env Environment, typ Type) VirtualMachine {
}
}
func (self *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
self.depth++
// Recover from any require exception
defer func() {
if r := recover(); r != nil {
ret = closure.Return(nil)
err = fmt.Errorf("%v", r)
}
}()
// Don't bother with the execution if there's no code.
if len(closure.Code) == 0 {
return closure.Return(nil), nil
}
var (
op OpCode
mem = &Memory{}
stack = NewStack()
pc = 0
step = 0
require = func(m int) {
if stack.Len() < m {
panic(fmt.Sprintf("%04v (%v) stack err size = %d, required = %d", pc, op, stack.Len(), m))
}
}
)
for {
// The base for all big integer arithmetic
base := new(big.Int)
step++
// Get the memory location of pc
op := closure.GetOp(pc)
gas := new(big.Int)
addStepGasUsage := func(amount *big.Int) {
gas.Add(gas, amount)
}
addStepGasUsage(GasStep)
var newMemSize *big.Int = ethutil.Big0
switch op {
case STOP:
gas.Set(ethutil.Big0)
case SUICIDE:
gas.Set(ethutil.Big0)
case SLOAD:
gas.Set(GasSLoad)
case SSTORE:
var mult *big.Int
y, x := stack.Peekn()
val := closure.GetStorage(x)
if val.BigInt().Cmp(ethutil.Big0) == 0 && len(y.Bytes()) > 0 {
mult = ethutil.Big2
} else if val.BigInt().Cmp(ethutil.Big0) != 0 && len(y.Bytes()) == 0 {
mult = ethutil.Big0
} else {
mult = ethutil.Big1
}
gas = new(big.Int).Mul(mult, GasSStore)
case BALANCE:
gas.Set(GasBalance)
case MSTORE:
require(2)
newMemSize = calcMemSize(stack.Peek(), u256(32))
case MLOAD:
require(1)
newMemSize = calcMemSize(stack.Peek(), u256(32))
case MSTORE8:
require(2)
newMemSize = calcMemSize(stack.Peek(), u256(1))
case RETURN:
require(2)
newMemSize = calcMemSize(stack.Peek(), stack.data[stack.Len()-2])
case SHA3:
require(2)
gas.Set(GasSha)
newMemSize = calcMemSize(stack.Peek(), stack.data[stack.Len()-2])
case CALLDATACOPY:
require(2)
newMemSize = calcMemSize(stack.Peek(), stack.data[stack.Len()-3])
case CODECOPY:
require(3)
newMemSize = calcMemSize(stack.Peek(), stack.data[stack.Len()-3])
case EXTCODECOPY:
require(4)
newMemSize = calcMemSize(stack.data[stack.Len()-2], stack.data[stack.Len()-4])
case CALL, CALLCODE:
require(7)
gas.Set(GasCall)
addStepGasUsage(stack.data[stack.Len()-1])
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 = ethutil.BigMax(x, y)
case CREATE:
require(3)
gas.Set(GasCreate)
newMemSize = calcMemSize(stack.data[stack.Len()-2], stack.data[stack.Len()-3])
}
if newMemSize.Cmp(ethutil.Big0) > 0 {
newMemSize.Add(newMemSize, u256(31))
newMemSize.Div(newMemSize, u256(32))
newMemSize.Mul(newMemSize, u256(32))
if newMemSize.Cmp(u256(int64(mem.Len()))) > 0 {
memGasUsage := new(big.Int).Sub(newMemSize, u256(int64(mem.Len())))
memGasUsage.Mul(GasMemory, memGasUsage)
memGasUsage.Div(memGasUsage, u256(32))
addStepGasUsage(memGasUsage)
}
}
if !closure.UseGas(gas) {
err := fmt.Errorf("Insufficient gas for %v. req %v has %v", op, gas, closure.Gas)
closure.UseGas(closure.Gas)
return closure.Return(nil), err
}
mem.Resize(newMemSize.Uint64())
switch op {
// 0x20 range
case ADD:
require(2)
x, y := stack.Popn()
base.Add(y, x)
U256(base)
// Pop result back on the stack
stack.Push(base)
case SUB:
require(2)
x, y := stack.Popn()
base.Sub(y, x)
U256(base)
// Pop result back on the stack
stack.Push(base)
case MUL:
require(2)
x, y := stack.Popn()
base.Mul(y, x)
U256(base)
// Pop result back on the stack
stack.Push(base)
case DIV:
require(2)
x, y := stack.Popn()
if x.Cmp(ethutil.Big0) != 0 {
base.Div(y, x)
}
U256(base)
// Pop result back on the stack
stack.Push(base)
case SDIV:
require(2)
y, x := S256(stack.Pop()), S256(stack.Pop())
if x.Cmp(ethutil.Big0) == 0 {
base.Set(ethutil.Big0)
} else {
n := new(big.Int)
if new(big.Int).Mul(y, x).Cmp(ethutil.Big0) < 0 {
n.SetInt64(-1)
} else {
n.SetInt64(1)
}
base.Div(y.Abs(y), x.Mul(x.Abs(x), n))
U256(base)
}
stack.Push(base)
case MOD:
require(2)
x, y := stack.Popn()
base.Mod(y, x)
U256(base)
stack.Push(base)
case SMOD:
require(2)
y, x := S256(stack.Pop()), S256(stack.Pop())
if x.Cmp(ethutil.Big0) == 0 {
base.Set(ethutil.Big0)
} else {
n := new(big.Int)
if y.Cmp(ethutil.Big0) < 0 {
n.SetInt64(-1)
} else {
n.SetInt64(1)
}
base.Mod(y.Abs(y), x.Mul(x.Abs(x), n))
U256(base)
}
stack.Push(base)
case EXP:
require(2)
x, y := stack.Popn()
base.Exp(y, x, Pow256)
U256(base)
stack.Push(base)
case NOT:
require(1)
base.Sub(Pow256, stack.Pop())
base = U256(base)
stack.Push(base)
case LT:
require(2)
x, y := stack.Popn()
// x < y
if y.Cmp(x) < 0 {
stack.Push(ethutil.BigTrue)
} else {
stack.Push(ethutil.BigFalse)
}
case GT:
require(2)
x, y := stack.Popn()
// x > y
if y.Cmp(x) > 0 {
stack.Push(ethutil.BigTrue)
} else {
stack.Push(ethutil.BigFalse)
}
case SLT:
require(2)
y, x := S256(stack.Pop()), S256(stack.Pop())
// x < y
if y.Cmp(S256(x)) < 0 {
stack.Push(ethutil.BigTrue)
} else {
stack.Push(ethutil.BigFalse)
}
case SGT:
require(2)
y, x := S256(stack.Pop()), S256(stack.Pop())
// x > y
if y.Cmp(x) > 0 {
stack.Push(ethutil.BigTrue)
} else {
stack.Push(ethutil.BigFalse)
}
case EQ:
require(2)
x, y := stack.Popn()
// x == y
if x.Cmp(y) == 0 {
stack.Push(ethutil.BigTrue)
} else {
stack.Push(ethutil.BigFalse)
}
case ISZERO:
require(1)
x := stack.Pop()
if x.Cmp(ethutil.BigFalse) > 0 {
stack.Push(ethutil.BigFalse)
} else {
stack.Push(ethutil.BigTrue)
}
// 0x10 range
case AND:
require(2)
x, y := stack.Popn()
stack.Push(base.And(y, x))
case OR:
require(2)
x, y := stack.Popn()
stack.Push(base.Or(y, x))
case XOR:
require(2)
x, y := stack.Popn()
stack.Push(base.Xor(y, x))
case BYTE:
require(2)
val, th := stack.Popn()
if th.Cmp(big.NewInt(32)) < 0 && th.Cmp(big.NewInt(int64(len(val.Bytes())))) < 0 {
byt := big.NewInt(int64(ethutil.LeftPadBytes(val.Bytes(), 32)[th.Int64()]))
stack.Push(byt)
} else {
stack.Push(ethutil.BigFalse)
}
case ADDMOD:
require(3)
x := stack.Pop()
y := stack.Pop()
z := stack.Pop()
base.Add(x, y)
base.Mod(base, z)
U256(base)
stack.Push(base)
case MULMOD:
require(3)
x := stack.Pop()
y := stack.Pop()
z := stack.Pop()
base.Mul(x, y)
base.Mod(base, z)
U256(base)
stack.Push(base)
// 0x20 range
case SHA3:
require(2)
size, offset := stack.Popn()
data := crypto.Sha3(mem.Get(offset.Int64(), size.Int64()))
stack.Push(ethutil.BigD(data))
// 0x30 range
case ADDRESS:
stack.Push(ethutil.BigD(closure.Address()))
case BALANCE:
require(1)
addr := stack.Pop().Bytes()
balance := self.env.State().GetBalance(addr)
stack.Push(balance)
case ORIGIN:
origin := self.env.Origin()
stack.Push(ethutil.BigD(origin))
case CALLER:
caller := closure.caller.Address()
stack.Push(ethutil.BigD(caller))
case CALLVALUE:
value := closure.exe.value
stack.Push(value)
case CALLDATALOAD:
require(1)
var (
offset = stack.Pop()
data = make([]byte, 32)
lenData = big.NewInt(int64(len(closure.Args)))
)
if lenData.Cmp(offset) >= 0 {
length := new(big.Int).Add(offset, ethutil.Big32)
length = ethutil.BigMin(length, lenData)
copy(data, closure.Args[offset.Int64():length.Int64()])
}
stack.Push(ethutil.BigD(data))
case CALLDATASIZE:
l := int64(len(closure.Args))
stack.Push(big.NewInt(l))
case CALLDATACOPY:
var (
size = int64(len(closure.Args))
mOff = stack.Pop().Int64()
cOff = stack.Pop().Int64()
l = stack.Pop().Int64()
)
if cOff > size {
cOff = 0
l = 0
} else if cOff+l > size {
l = 0
}
code := closure.Args[cOff : cOff+l]
mem.Set(mOff, l, code)
case CODESIZE, EXTCODESIZE:
var code []byte
if op == EXTCODECOPY {
addr := stack.Pop().Bytes()
code = self.env.State().GetCode(addr)
} else {
code = closure.Code
}
l := big.NewInt(int64(len(code)))
stack.Push(l)
case CODECOPY, EXTCODECOPY:
var code []byte
if op == EXTCODECOPY {
addr := stack.Pop().Bytes()
code = self.env.State().GetCode(addr)
} else {
code = closure.Code
}
var (
size = int64(len(code))
mOff = stack.Pop().Int64()
cOff = stack.Pop().Int64()
l = stack.Pop().Int64()
)
if cOff > size {
cOff = 0
l = 0
} else if cOff+l > size {
l = 0
}
codeCopy := code[cOff : cOff+l]
mem.Set(mOff, l, codeCopy)
case GASPRICE:
stack.Push(closure.Price)
// 0x40 range
case PREVHASH:
prevHash := self.env.PrevHash()
stack.Push(ethutil.BigD(prevHash))
case COINBASE:
coinbase := self.env.Coinbase()
stack.Push(ethutil.BigD(coinbase))
case TIMESTAMP:
time := self.env.Time()
stack.Push(big.NewInt(time))
case NUMBER:
number := self.env.BlockNumber()
stack.Push(number)
case DIFFICULTY:
difficulty := self.env.Difficulty()
stack.Push(difficulty)
case GASLIMIT:
// TODO
stack.Push(big.NewInt(0))
// 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 := int(op - PUSH1 + 1)
val := ethutil.BigD(closure.GetBytes(int(pc+1), a))
// Push value to stack
stack.Push(val)
pc += a
step += int(op) - int(PUSH1) + 1
case POP:
require(1)
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.Dupn(n)
case SWAP1, SWAP2, SWAP3, SWAP4, SWAP5, SWAP6, SWAP7, SWAP8, SWAP9, SWAP10, SWAP11, SWAP12, SWAP13, SWAP14, SWAP15, SWAP16:
n := int(op - SWAP1 + 2)
stack.Swapn(n)
case MLOAD:
require(1)
offset := stack.Pop()
val := ethutil.BigD(mem.Get(offset.Int64(), 32))
stack.Push(val)
case MSTORE: // Store the value at stack top-1 in to memory at location stack top
require(2)
// Pop value of the stack
val, mStart := stack.Popn()
mem.Set(mStart.Int64(), 32, ethutil.BigToBytes(val, 256))
case MSTORE8:
require(2)
off := stack.Pop()
val := stack.Pop()
mem.store[off.Int64()] = byte(val.Int64() & 0xff)
case SLOAD:
require(1)
loc := stack.Pop()
val := closure.GetStorage(loc)
stack.Push(val.BigInt())
case SSTORE:
require(2)
val, loc := stack.Popn()
closure.SetStorage(loc, ethutil.NewValue(val))
closure.message.AddStorageChange(loc.Bytes())
case JUMP:
require(1)
pc = int(stack.Pop().Int64())
// Reduce pc by one because of the increment that's at the end of this for loop
continue
case JUMPI:
require(2)
cond, pos := stack.Popn()
if cond.Cmp(ethutil.BigTrue) >= 0 {
pc = int(pos.Int64())
if closure.GetOp(int(pc)) != JUMPDEST {
return closure.Return(nil), fmt.Errorf("JUMP missed JUMPDEST %v", pc)
}
continue
}
case JUMPDEST:
case PC:
stack.Push(u256(int64(pc)))
case MSIZE:
stack.Push(big.NewInt(int64(mem.Len())))
case GAS:
stack.Push(closure.Gas)
// 0x60 range
case CREATE:
require(3)
var (
err error
value = stack.Pop()
size, offset = stack.Popn()
input = mem.Get(offset.Int64(), size.Int64())
gas = new(big.Int).Set(closure.Gas)
// Snapshot the current stack so we are able to
// revert back to it later.
//snapshot = self.env.State().Copy()
)
// Generate a new address
addr := crypto.CreateAddress(closure.Address(), closure.object.Nonce)
closure.object.Nonce++
closure.UseGas(closure.Gas)
msg := NewExecution(self, addr, input, gas, closure.Price, value)
ret, err := msg.Exec(addr, closure)
if err != nil {
stack.Push(ethutil.BigFalse)
// Revert the state as it was before.
//self.env.State().Set(snapshot)
} else {
msg.object.Code = ret
stack.Push(ethutil.BigD(addr))
}
case CALL, CALLCODE:
require(7)
gas := stack.Pop()
// Pop gas and value of the stack.
value, addr := stack.Popn()
// Pop input size and offset
inSize, inOffset := stack.Popn()
// Pop return size and offset
retSize, retOffset := stack.Popn()
// Get the arguments from the memory
args := mem.Get(inOffset.Int64(), inSize.Int64())
var executeAddr []byte
if op == CALLCODE {
executeAddr = closure.Address()
} else {
executeAddr = addr.Bytes()
}
msg := NewExecution(self, executeAddr, args, gas, closure.Price, value)
ret, err := msg.Exec(addr.Bytes(), closure)
if err != nil {
stack.Push(ethutil.BigFalse)
} else {
stack.Push(ethutil.BigTrue)
mem.Set(retOffset.Int64(), retSize.Int64(), ret)
}
case RETURN:
require(2)
size, offset := stack.Popn()
ret := mem.Get(offset.Int64(), size.Int64())
return closure.Return(ret), nil
case SUICIDE:
require(1)
receiver := self.env.State().GetOrNewStateObject(stack.Pop().Bytes())
receiver.AddAmount(closure.object.Balance())
closure.object.MarkForDeletion()
fallthrough
case STOP: // Stop the closure
return closure.Return(nil), nil
default:
vmlogger.Debugf("(pc) %-3v Invalid opcode %x\n", pc, op)
//panic(fmt.Sprintf("Invalid opcode %x", op))
return closure.Return(nil), fmt.Errorf("Invalid opcode %x", op)
}
pc++
}
func (self *Vm) Run(me, caller ClosureRef, code []byte, value, gas, price *big.Int, data []byte) (ret []byte, err error) {
return nil, nil
}
func (self *Vm) Env() Environment {

55
vm/vm_debug.go
View File

@ -35,11 +35,26 @@ func NewDebugVm(env Environment) *DebugVm {
lt = LogTyDiff
}
return &DebugVm{env: env, logTy: lt, Recoverable: false}
return &DebugVm{env: env, logTy: lt, Recoverable: true}
}
func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
self.depth++
func (self *DebugVm) Run(me, caller ClosureRef, code []byte, value, gas, price *big.Int, callData []byte) (ret []byte, err error) {
self.env.SetDepth(self.env.Depth() + 1)
msg := self.env.State().Manifest().AddMessage(&state.Message{
To: me.Address(), From: caller.Address(),
Input: callData,
Origin: self.env.Origin(),
Block: self.env.BlockHash(), Timestamp: self.env.Time(), Coinbase: self.env.Coinbase(), Number: self.env.BlockNumber(),
Value: value,
})
closure := NewClosure(msg, caller, me, code, gas, price)
if self.env.Depth() == MaxCallDepth {
closure.UseGas(gas)
return closure.Return(nil), DepthError{}
}
if self.Recoverable {
// Recover from any require exception
@ -96,17 +111,12 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
}
)
// Debug hook
if self.Dbg != nil {
self.Dbg.SetCode(closure.Code)
}
// Don't bother with the execution if there's no code.
if len(closure.Code) == 0 {
if len(code) == 0 {
return closure.Return(nil), nil
}
vmlogger.Debugf("(%d) %x gas: %v (d) %x\n", self.depth, closure.Address(), closure.Gas, closure.Args)
vmlogger.Debugf("(%d) %x gas: %v (d) %x\n", self.depth, closure.Address(), closure.Gas, callData)
for {
prevStep = step
@ -596,8 +606,6 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
self.Printf(" => %x", caller)
case CALLVALUE:
value := closure.exe.value
stack.Push(value)
self.Printf(" => %v", value)
@ -605,27 +613,27 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
var (
offset = stack.Pop()
data = make([]byte, 32)
lenData = big.NewInt(int64(len(closure.Args)))
lenData = big.NewInt(int64(len(callData)))
)
if lenData.Cmp(offset) >= 0 {
length := new(big.Int).Add(offset, ethutil.Big32)
length = ethutil.BigMin(length, lenData)
copy(data, closure.Args[offset.Int64():length.Int64()])
copy(data, callData[offset.Int64():length.Int64()])
}
self.Printf(" => 0x%x", data)
stack.Push(ethutil.BigD(data))
case CALLDATASIZE:
l := int64(len(closure.Args))
l := int64(len(callData))
stack.Push(big.NewInt(l))
self.Printf(" => %d", l)
case CALLDATACOPY:
var (
size = int64(len(closure.Args))
size = int64(len(callData))
mOff = stack.Pop().Int64()
cOff = stack.Pop().Int64()
l = stack.Pop().Int64()
@ -638,7 +646,7 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
l = 0
}
code := closure.Args[cOff : cOff+l]
code := callData[cOff : cOff+l]
mem.Set(mOff, l, code)
@ -847,17 +855,14 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
closure.UseGas(closure.Gas)
msg := NewExecution(self, addr, input, gas, closure.Price, value)
ret, err := msg.Create(closure)
ret, err, ref := self.env.Create(closure, addr, input, gas, price, value)
if err != nil {
stack.Push(ethutil.BigFalse)
// Revert the state as it was before.
//self.env.State().Set(snapshot)
self.Printf("CREATE err %v", err)
} else {
msg.object.Code = ret
ref.SetCode(ret)
msg.Output = ret
stack.Push(ethutil.BigD(addr))
}
@ -889,14 +894,14 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
executeAddr = addr.Bytes()
}
msg := NewExecution(self, executeAddr, args, gas, closure.Price, value)
ret, err := msg.Exec(addr.Bytes(), closure)
ret, err := self.env.Call(closure, executeAddr, args, gas, price, value)
if err != nil {
stack.Push(ethutil.BigFalse)
vmlogger.Debugln(err)
} else {
stack.Push(ethutil.BigTrue)
msg.Output = ret
mem.Set(retOffset.Int64(), retSize.Int64(), ret)
}