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Refactoring state transitioning

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This commit is contained in:
obscuren
2014-06-13 12:45:11 +02:00
parent b855e5f7df
commit d078e9b8c9
10 changed files with 517 additions and 199 deletions
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77
ethchain/vm.go
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@ -5,6 +5,7 @@ import (
"fmt"
"github.com/ethereum/eth-go/ethutil"
_ "github.com/obscuren/secp256k1-go"
"math"
_ "math"
"math/big"
)
@ -18,6 +19,7 @@ var (
GasCreate = big.NewInt(100)
GasCall = big.NewInt(20)
GasMemory = big.NewInt(1)
GasData = big.NewInt(5)
GasTx = big.NewInt(500)
)
@ -116,9 +118,8 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
gas.Add(gas, amount)
}
var newMemSize uint64 = 0
switch op {
case SHA3:
setStepGasUsage(GasSha)
case SLOAD:
setStepGasUsage(GasSLoad)
case SSTORE:
@ -135,27 +136,61 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
setStepGasUsage(new(big.Int).Mul(mult, GasSStore))
case BALANCE:
setStepGasUsage(GasBalance)
case CREATE:
case MSTORE:
require(2)
newMemSize = stack.Peek().Uint64() + 32
case MSTORE8:
require(2)
newMemSize = stack.Peek().Uint64() + 1
case RETURN:
require(2)
newMemSize = stack.Peek().Uint64() + stack.data[stack.Len()-2].Uint64()
case SHA3:
require(2)
setStepGasUsage(GasSha)
newMemSize = stack.Peek().Uint64() + stack.data[stack.Len()-2].Uint64()
case CALLDATACOPY:
require(3)
args := stack.Get(big.NewInt(3))
initSize := new(big.Int).Add(args[1], args[0])
newMemSize = stack.Peek().Uint64() + stack.data[stack.Len()-3].Uint64()
case CODECOPY:
require(3)
setStepGasUsage(CalculateTxGas(initSize))
newMemSize = stack.Peek().Uint64() + stack.data[stack.Len()-3].Uint64()
case CALL:
require(7)
setStepGasUsage(GasCall)
case MLOAD, MSIZE, MSTORE8, MSTORE:
setStepGasUsage(GasMemory)
x := stack.data[stack.Len()-6].Uint64() + stack.data[stack.Len()-7].Uint64()
y := stack.data[stack.Len()-4].Uint64() + stack.data[stack.Len()-5].Uint64()
newMemSize = uint64(math.Max(float64(x), float64(y)))
case CREATE:
require(3)
setStepGasUsage(GasCreate)
newMemSize = stack.data[stack.Len()-2].Uint64() + stack.data[stack.Len()-3].Uint64()
default:
setStepGasUsage(GasStep)
}
newMemSize = (newMemSize + 31) / 32 * 32
if newMemSize > uint64(mem.Len()) {
m := GasMemory.Uint64() * (newMemSize - uint64(mem.Len())) / 32
setStepGasUsage(big.NewInt(int64(m)))
}
if !closure.UseGas(gas) {
ethutil.Config.Log.Debugln("Insufficient gas", closure.Gas, gas)
return closure.Return(nil), fmt.Errorf("insufficient gas %v %v", closure.Gas, gas)
}
mem.Resize(newMemSize)
switch op {
case LOG:
stack.Print()
@ -340,6 +375,23 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
case CALLDATACOPY:
case CODESIZE:
case CODECOPY:
var (
size = int64(len(closure.Script))
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.Script[cOff : cOff+l]
mem.Set(mOff, l, code)
case GASPRICE:
stack.Push(closure.Price)
@ -448,7 +500,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
// Transfer all remaining gas to the new
// contract so it may run the init script
gas := new(big.Int).Set(closure.Gas)
closure.UseGas(gas)
//closure.UseGas(gas)
// Create the closure
c := NewClosure(closure.callee,
@ -498,12 +550,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
if contract != nil {
// Prepay for the gas
// If gas is set to 0 use all remaining gas for the next call
if gas.Cmp(big.NewInt(0)) == 0 {
// Copy
gas = new(big.Int).Set(closure.Gas)
}
closure.UseGas(gas)
//closure.UseGas(gas)
// Add the value to the state object
contract.AddAmount(value)