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Closure call now returns the total usage as well

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* Return the used gas value based on the UseGas and ReturnGas
This commit is contained in:
obscuren
2014-05-28 12:05:46 +02:00
parent 1c01e9c095
commit 73761f7af6
4 changed files with 138 additions and 104 deletions
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164
ethchain/vm.go
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@ -21,11 +21,10 @@ var (
GasTx = big.NewInt(500)
)
func CalculateTxGas(initSize, scriptSize *big.Int) *big.Int {
func CalculateTxGas(initSize *big.Int) *big.Int {
totalGas := new(big.Int)
totalGas.Add(totalGas, GasCreate)
txTotalBytes := new(big.Int).Add(initSize, scriptSize)
txTotalBytes := new(big.Int).Set(initSize)
txTotalBytes.Div(txTotalBytes, ethutil.Big32)
totalGas.Add(totalGas, new(big.Int).Mul(txTotalBytes, GasSStore))
@ -92,12 +91,14 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
pc := big.NewInt(0)
// Current step count
step := 0
prevStep := 0
if ethutil.Config.Debug {
ethutil.Config.Log.Debugf("# op\n")
}
for {
prevStep = step
// The base for all big integer arithmetic
base := new(big.Int)
@ -111,16 +112,16 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
}
gas := new(big.Int)
useGas := func(amount *big.Int) {
setStepGasUsage := func(amount *big.Int) {
gas.Add(gas, amount)
}
switch op {
case oSHA3:
useGas(GasSha)
case oSLOAD:
useGas(GasSLoad)
case oSSTORE:
case SHA3:
setStepGasUsage(GasSha)
case SLOAD:
setStepGasUsage(GasSLoad)
case SSTORE:
var mult *big.Int
y, x := stack.Peekn()
val := closure.GetMem(x)
@ -131,67 +132,64 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
} else {
mult = ethutil.Big1
}
useGas(new(big.Int).Mul(mult, GasSStore))
case oBALANCE:
useGas(GasBalance)
case oCREATE:
setStepGasUsage(new(big.Int).Mul(mult, GasSStore))
case BALANCE:
setStepGasUsage(GasBalance)
case CREATE:
require(3)
args := stack.Get(big.NewInt(3))
initSize := new(big.Int).Add(args[1], args[0])
useGas(CalculateTxGas(initSize, ethutil.Big0))
case oCALL:
useGas(GasCall)
case oMLOAD, oMSIZE, oMSTORE8, oMSTORE:
useGas(GasMemory)
setStepGasUsage(CalculateTxGas(initSize))
case CALL:
setStepGasUsage(GasCall)
case MLOAD, MSIZE, MSTORE8, MSTORE:
setStepGasUsage(GasMemory)
default:
useGas(GasStep)
setStepGasUsage(GasStep)
}
if closure.Gas.Cmp(gas) < 0 {
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)
}
// Sub the amount of gas from the remaining
closure.Gas.Sub(closure.Gas, gas)
switch op {
case oLOG:
case LOG:
stack.Print()
mem.Print()
// 0x20 range
case oADD:
case ADD:
require(2)
x, y := stack.Popn()
// (x + y) % 2 ** 256
base.Add(x, y)
// Pop result back on the stack
stack.Push(base)
case oSUB:
case SUB:
require(2)
x, y := stack.Popn()
// (x - y) % 2 ** 256
base.Sub(x, y)
// Pop result back on the stack
stack.Push(base)
case oMUL:
case MUL:
require(2)
x, y := stack.Popn()
// (x * y) % 2 ** 256
base.Mul(x, y)
// Pop result back on the stack
stack.Push(base)
case oDIV:
case DIV:
require(2)
x, y := stack.Popn()
// floor(x / y)
base.Div(x, y)
// Pop result back on the stack
stack.Push(base)
case oSDIV:
case SDIV:
require(2)
x, y := stack.Popn()
// n > 2**255
@ -208,12 +206,12 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
}
// Push result on to the stack
stack.Push(z)
case oMOD:
case MOD:
require(2)
x, y := stack.Popn()
base.Mod(x, y)
stack.Push(base)
case oSMOD:
case SMOD:
require(2)
x, y := stack.Popn()
// n > 2**255
@ -230,17 +228,17 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
}
// Push result on to the stack
stack.Push(z)
case oEXP:
case EXP:
require(2)
x, y := stack.Popn()
base.Exp(x, y, Pow256)
stack.Push(base)
case oNEG:
case NEG:
require(1)
base.Sub(Pow256, stack.Pop())
stack.Push(base)
case oLT:
case LT:
require(2)
x, y := stack.Popn()
// x < y
@ -249,7 +247,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
} else {
stack.Push(ethutil.BigFalse)
}
case oGT:
case GT:
require(2)
x, y := stack.Popn()
// x > y
@ -258,7 +256,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
} else {
stack.Push(ethutil.BigFalse)
}
case oEQ:
case EQ:
require(2)
x, y := stack.Popn()
// x == y
@ -267,7 +265,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
} else {
stack.Push(ethutil.BigFalse)
}
case oNOT:
case NOT:
require(1)
x := stack.Pop()
if x.Cmp(ethutil.BigFalse) == 0 {
@ -277,7 +275,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
}
// 0x10 range
case oAND:
case AND:
require(2)
x, y := stack.Popn()
if (x.Cmp(ethutil.BigTrue) >= 0) && (y.Cmp(ethutil.BigTrue) >= 0) {
@ -286,7 +284,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
stack.Push(ethutil.BigFalse)
}
case oOR:
case OR:
require(2)
x, y := stack.Popn()
if (x.Cmp(ethutil.BigInt0) >= 0) || (y.Cmp(ethutil.BigInt0) >= 0) {
@ -294,11 +292,11 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
} else {
stack.Push(ethutil.BigFalse)
}
case oXOR:
case XOR:
require(2)
x, y := stack.Popn()
stack.Push(base.Xor(x, y))
case oBYTE:
case BYTE:
require(2)
val, th := stack.Popn()
if th.Cmp(big.NewInt(32)) < 0 {
@ -308,92 +306,92 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
}
// 0x20 range
case oSHA3:
case SHA3:
require(2)
size, offset := stack.Popn()
data := mem.Get(offset.Int64(), size.Int64())
stack.Push(ethutil.BigD(data))
// 0x30 range
case oADDRESS:
case ADDRESS:
stack.Push(ethutil.BigD(closure.Object().Address()))
case oBALANCE:
case BALANCE:
stack.Push(closure.object.Amount)
case oORIGIN:
case ORIGIN:
stack.Push(ethutil.BigD(vm.vars.Origin))
case oCALLER:
case CALLER:
stack.Push(ethutil.BigD(closure.Callee().Address()))
case oCALLVALUE:
case CALLVALUE:
stack.Push(vm.vars.Value)
case oCALLDATALOAD:
case CALLDATALOAD:
require(1)
offset := stack.Pop().Int64()
val := closure.Args[offset : offset+32]
stack.Push(ethutil.BigD(val))
case oCALLDATASIZE:
case CALLDATASIZE:
stack.Push(big.NewInt(int64(len(closure.Args))))
case oGASPRICE:
case GASPRICE:
stack.Push(closure.Price)
// 0x40 range
case oPREVHASH:
case PREVHASH:
stack.Push(ethutil.BigD(vm.vars.PrevHash))
case oCOINBASE:
case COINBASE:
stack.Push(ethutil.BigD(vm.vars.Coinbase))
case oTIMESTAMP:
case TIMESTAMP:
stack.Push(big.NewInt(vm.vars.Time))
case oNUMBER:
case NUMBER:
stack.Push(big.NewInt(int64(vm.vars.BlockNumber)))
case oDIFFICULTY:
case DIFFICULTY:
stack.Push(vm.vars.Diff)
case oGASLIMIT:
case GASLIMIT:
// TODO
stack.Push(big.NewInt(0))
// 0x50 range
case oPUSH1, oPUSH2, oPUSH3, oPUSH4, oPUSH5, oPUSH6, oPUSH7, oPUSH8, oPUSH9, oPUSH10, oPUSH11, oPUSH12, oPUSH13, oPUSH14, oPUSH15, oPUSH16, oPUSH17, oPUSH18, oPUSH19, oPUSH20, oPUSH21, oPUSH22, oPUSH23, oPUSH24, oPUSH25, oPUSH26, oPUSH27, oPUSH28, oPUSH29, oPUSH30, oPUSH31, oPUSH32:
a := big.NewInt(int64(op) - int64(oPUSH1) + 1)
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 := big.NewInt(int64(op) - int64(PUSH1) + 1)
pc.Add(pc, ethutil.Big1)
data := closure.Gets(pc, a)
val := ethutil.BigD(data.Bytes())
// Push value to stack
stack.Push(val)
pc.Add(pc, a.Sub(a, big.NewInt(1)))
step++
case oPOP:
step += int(op) - int(PUSH1) + 1
case POP:
require(1)
stack.Pop()
case oDUP:
case DUP:
require(1)
stack.Push(stack.Peek())
case oSWAP:
case SWAP:
require(2)
x, y := stack.Popn()
stack.Push(y)
stack.Push(x)
case oMLOAD:
case MLOAD:
require(1)
offset := stack.Pop()
stack.Push(ethutil.BigD(mem.Get(offset.Int64(), 32)))
case oMSTORE: // Store the value at stack top-1 in to memory at location stack top
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 oMSTORE8:
case MSTORE8:
require(2)
val, mStart := stack.Popn()
base.And(val, new(big.Int).SetInt64(0xff))
mem.Set(mStart.Int64(), 32, ethutil.BigToBytes(base, 256))
case oSLOAD:
case SLOAD:
require(1)
loc := stack.Pop()
val := closure.GetMem(loc)
//fmt.Println("get", val.BigInt(), "@", loc)
stack.Push(val.BigInt())
case oSSTORE:
case SSTORE:
require(2)
val, loc := stack.Popn()
//fmt.Println("storing", val, "@", loc)
@ -401,13 +399,13 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
// Add the change to manifest
vm.state.manifest.AddStorageChange(closure.Object(), loc.Bytes(), val)
case oJUMP:
case JUMP:
require(1)
pc = stack.Pop()
// Reduce pc by one because of the increment that's at the end of this for loop
//pc.Sub(pc, ethutil.Big1)
continue
case oJUMPI:
case JUMPI:
require(2)
cond, pos := stack.Popn()
if cond.Cmp(ethutil.BigTrue) == 0 {
@ -415,12 +413,12 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
//pc.Sub(pc, ethutil.Big1)
continue
}
case oPC:
case PC:
stack.Push(pc)
case oMSIZE:
case MSIZE:
stack.Push(big.NewInt(int64(mem.Len())))
// 0x60 range
case oCREATE:
case CREATE:
require(3)
value := stack.Pop()
@ -439,9 +437,10 @@ 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.Gas.Sub(closure.Gas, gas)
closure.UseGas(gas)
// Create the closure
closure := NewClosure(closure.callee,
c := NewClosure(closure.callee,
closure.Object(),
contract.initScript,
vm.state,
@ -449,7 +448,8 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
closure.Price)
// Call the closure and set the return value as
// main script.
closure.Script, err = closure.Call(vm, nil, hook)
c.Script, _, err = c.Call(vm, nil, hook)
if err != nil {
stack.Push(ethutil.BigFalse)
@ -460,7 +460,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
vm.state.UpdateStateObject(contract)
}
case oCALL:
case CALL:
require(7)
// Closure addr
addr := stack.Pop()
@ -492,7 +492,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
// Copy
gas = new(big.Int).Set(closure.Gas)
}
closure.Gas.Sub(closure.Gas, gas)
closure.UseGas(gas)
// Add the value to the state object
contract.AddAmount(value)
@ -500,7 +500,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
// Create a new callable closure
closure := NewClosure(closure.Object(), contract, contract.script, vm.state, gas, closure.Price)
// Executer the closure and get the return value (if any)
ret, err := closure.Call(vm, args, hook)
ret, _, err := closure.Call(vm, args, hook)
if err != nil {
stack.Push(ethutil.BigFalse)
// Reset the changes applied this object
@ -516,13 +516,13 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
ethutil.Config.Log.Debugf("Contract %x not found\n", addr.Bytes())
stack.Push(ethutil.BigFalse)
}
case oRETURN:
case RETURN:
require(2)
size, offset := stack.Popn()
ret := mem.Get(offset.Int64(), size.Int64())
return closure.Return(ret), nil
case oSUICIDE:
case SUICIDE:
require(1)
receiver := vm.state.GetAccount(stack.Pop().Bytes())
@ -532,7 +532,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
closure.object.state.Purge()
fallthrough
case oSTOP: // Stop the closure
case STOP: // Stop the closure
return closure.Return(nil), nil
default:
ethutil.Config.Log.Debugf("Invalid opcode %x\n", op)
@ -543,7 +543,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
pc.Add(pc, ethutil.Big1)
if hook != nil {
if !hook(step-1, op, mem, stack, closure.Object()) {
if !hook(prevStep, op, mem, stack, closure.Object()) {
return nil, nil
}
}