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core/vm: changed program counter to uint64

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This commit is contained in:
obscuren 2015-06-10 10:44:46 +02:00
parent 7e58949c3f
commit 468501cb86
2 changed files with 13 additions and 13 deletions
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8
core/vm/context.go
View file

@ -49,13 +49,13 @@ func NewContext(caller ContextRef, object ContextRef, value, gas, price *big.Int
return c
}
func (c *Context) GetOp(n *big.Int) OpCode {
func (c *Context) GetOp(n uint64) OpCode {
return OpCode(c.GetByte(n))
}
func (c *Context) GetByte(n *big.Int) byte {
if n.Cmp(big.NewInt(int64(len(c.Code)))) < 0 {
return c.Code[n.Int64()]
func (c *Context) GetByte(n uint64) byte {
if n < uint64(len(c.Code)) {
return c.Code[n]
}
return 0

18
core/vm/vm.go
View file

@ -81,17 +81,17 @@ func (self *Vm) Run(context *Context, callData []byte) (ret []byte, err error) {
codehash = crypto.Sha3Hash(code)
mem = NewMemory()
stack = newStack()
pc = new(big.Int)
pc = uint64(0)
statedb = self.env.State()
jump = func(from *big.Int, to *big.Int) error {
jump = func(from uint64, to *big.Int) error {
if !context.jumpdests.has(codehash, code, to) {
nop := context.GetOp(to)
nop := context.GetOp(to.Uint64())
return fmt.Errorf("invalid jump destination (%v) %v", nop, to)
}
self.Printf(" ~> %v", to)
pc = to
pc = to.Uint64()
self.Endl()
@ -519,11 +519,11 @@ func (self *Vm) Run(context *Context, callData []byte) (ret []byte, err error) {
stack.push(self.env.GasLimit())
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 - PUSH1 + 1))
byts := getData(code, new(big.Int).Add(pc, big.NewInt(1)), a)
size := uint64(op - PUSH1 + 1)
byts := getData(code, new(big.Int).SetUint64(pc+1), new(big.Int).SetUint64(size))
// push value to stack
stack.push(common.Bytes2Big(byts))
pc.Add(pc, a)
pc += size
self.Printf(" => 0x%x", byts)
case POP:
@ -603,7 +603,7 @@ func (self *Vm) Run(context *Context, callData []byte) (ret []byte, err error) {
case JUMPDEST:
case PC:
stack.push(pc)
stack.push(new(big.Int).SetUint64(pc))
case MSIZE:
stack.push(big.NewInt(int64(mem.Len())))
case GAS:
@ -708,7 +708,7 @@ func (self *Vm) Run(context *Context, callData []byte) (ret []byte, err error) {
return nil, fmt.Errorf("Invalid opcode %x", op)
}
pc.Add(pc, One)
pc++
self.Endl()
}