diff options
Diffstat (limited to 'ethvm/vm.go')
| -rw-r--r-- | ethvm/vm.go | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/ethvm/vm.go b/ethvm/vm.go index 97adedbed..0c9fa6f14 100644 --- a/ethvm/vm.go +++ b/ethvm/vm.go @@ -12,6 +12,8 @@ import ( // Shortcut :-) var To256 = ethutil.To256 +const MaxCallDepth = 1024 + type Debugger interface { BreakHook(step int, op OpCode, mem *Memory, stack *Stack, object *ethstate.StateObject) bool StepHook(step int, op OpCode, mem *Memory, stack *Stack, object *ethstate.StateObject) bool @@ -37,6 +39,8 @@ type Vm struct { Fn string Recoverable bool + + depth int } type Environment interface { @@ -80,6 +84,8 @@ func u256(n int64) *big.Int { } func (self *Vm) RunClosure(closure *Closure) (ret []byte, err error) { + self.depth++ + if self.Recoverable { // Recover from any require exception defer func() { @@ -766,9 +772,6 @@ func (self *Vm) RunClosure(closure *Closure) (ret []byte, err error) { // Generate a new address addr := ethcrypto.CreateAddress(closure.Address(), closure.object.Nonce) - //for i := uint64(0); self.env.State().GetStateObject(addr) != nil; i++ { - // ethcrypto.CreateAddress(closure.Address(), closure.object.Nonce+i) - //} closure.object.Nonce++ self.Printf(" (*) %x", addr).Endl() @@ -953,6 +956,10 @@ func (self *Execution) Exec(codeAddr []byte, caller ClosureRef) (ret []byte, err ret = p.Call(self.input) } } else { + if self.vm.depth == MaxCallDepth { + return nil, fmt.Errorf("Max call depth exceeded (%d)", MaxCallDepth) + } + // Retrieve the executing code code := self.vm.env.State().GetCode(codeAddr) |