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Renamed snapshot to copy/set and added it back to the VM

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This commit is contained in:
obscuren 2014-06-20 00:41:28 +02:00
parent 933aa63b7d
commit 0b8ba1d55b
2 changed files with 28 additions and 26 deletions
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15
ethchain/state.go
View File

@ -79,9 +79,9 @@ func (s *State) EachStorage(cb ethutil.EachCallback) {
}
func (self *State) ResetStateObject(stateObject *StateObject) {
stateObject.state.Reset()
delete(self.stateObjects, string(stateObject.Address()))
stateObject.state.Reset()
}
func (self *State) UpdateStateObject(stateObject *StateObject) {
@ -154,13 +154,10 @@ func (self *State) Copy() *State {
return nil
}
func (s *State) Snapshot() *State {
return s.Copy()
}
func (s *State) Revert(snapshot *State) {
s.trie = snapshot.trie
s.stateObjects = snapshot.stateObjects
func (self *State) Set(state *State) {
//s.trie = snapshot.trie
//s.stateObjects = snapshot.stateObjects
self = state
}
func (s *State) Put(key, object []byte) {

39
ethchain/vm.go
View File

@ -1,12 +1,9 @@
package ethchain
import (
_ "bytes"
"fmt"
"github.com/ethereum/eth-go/ethutil"
_ "github.com/obscuren/secp256k1-go"
"math"
_ "math"
"math/big"
)
@ -49,6 +46,8 @@ type Vm struct {
Verbose bool
logStr string
err error
}
type RuntimeVars struct {
@ -128,11 +127,11 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
// Get the opcode (it must be an opcode!)
op := OpCode(val.Uint())
vm.Printf("(pc) %-3d -o- %-14s", pc, op.String())
gas := new(big.Int)
addStepGasUsage := func(amount *big.Int) {
gas.Add(gas, amount)
if amount.Cmp(ethutil.Big0) >= 0 {
gas.Add(gas, amount)
}
}
addStepGasUsage(GasStep)
@ -215,6 +214,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
return closure.Return(nil), err
}
vm.Printf("(pc) %-3d -o- %-14s", pc, op.String())
vm.Printf(" (g) %-3v (%v)", gas, closure.Gas)
mem.Resize(newMemSize)
@ -491,6 +491,8 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
case DUP:
require(1)
stack.Push(stack.Peek())
vm.Printf(" => 0x%x", stack.Peek().Bytes())
case SWAP:
require(2)
x, y := stack.Popn()
@ -524,7 +526,11 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
case SSTORE:
require(2)
val, loc := stack.Popn()
closure.SetStorage(loc, ethutil.NewValue(val))
// FIXME This should be handled in the Trie it self
if val.Cmp(big.NewInt(0)) != 0 {
closure.SetStorage(loc, ethutil.NewValue(val))
}
// Add the change to manifest
vm.state.manifest.AddStorageChange(closure.Object(), loc.Bytes(), val)
@ -564,7 +570,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
// Snapshot the current stack so we are able to
// revert back to it later.
snapshot := vm.state.Snapshot()
snapshot := vm.state.Copy()
// Generate a new address
addr := ethutil.CreateAddress(closure.caller.Address(), closure.caller.N())
@ -592,12 +598,11 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
stack.Push(ethutil.BigFalse)
// Revert the state as it was before.
vm.state.Revert(snapshot)
vm.state.Set(snapshot)
} else {
stack.Push(ethutil.BigD(addr))
}
case CALL:
// TODO RE-WRITE
require(7)
vm.Endl()
@ -613,13 +618,13 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
// Get the arguments from the memory
args := mem.Get(inOffset.Int64(), inSize.Int64())
//snapshot := vm.state.Snapshot()
if closure.object.Amount.Cmp(value) < 0 {
ethutil.Config.Log.Debugf("Insufficient funds to transfer value. Req %v, has %v", value, closure.object.Amount)
stack.Push(ethutil.BigFalse)
} else {
snapshot := vm.state.Copy()
stateObject := vm.state.GetOrNewStateObject(addr.Bytes())
closure.object.SubAmount(value)
@ -633,10 +638,10 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
if err != nil {
stack.Push(ethutil.BigFalse)
// Reset the changes applied this object
vm.state.ResetStateObject(stateObject)
ethutil.Config.Log.Debugf("Closure execution failed. %v\n", err)
vm.err = err
vm.state.Set(snapshot)
} else {
stack.Push(ethutil.BigTrue)
@ -648,7 +653,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
size, offset := stack.Popn()
ret := mem.Get(offset.Int64(), size.Int64())
vm.Printf(" => 0x%x", ret).Endl()
vm.Printf(" => (%d) 0x%x", len(ret), ret).Endl()
return closure.Return(ret), nil
case SUICIDE:
@ -664,7 +669,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
fallthrough
case STOP: // Stop the closure
vm.Endl()
vm.Printf(" (g) %v", closure.Gas).Endl()
return closure.Return(nil), nil
default: