Minor improvements and fixes to the new vm structure

ethchain/asm.go

@@ -25,7 +25,7 @@ func Disassemble(script []byte) (asm []string) {
 			pc.Add(pc, ethutil.Big1)
 			a := int64(op) - int64(PUSH1) + 1
 			if int(pc.Int64()+a) > len(script) {
-				return nil
+				return
 			}
 
 			data := script[pc.Int64() : pc.Int64()+a]
@@ -40,5 +40,5 @@ func Disassemble(script []byte) (asm []string) {
 		pc.Add(pc, ethutil.Big1)
 	}
 
-	return
+	return asm
 }

ethchain/vm.go

@@ -563,10 +563,9 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 			}
 
 			code := closure.Script[cOff : cOff+l]
-			//fmt.Println("len:", l, "code off:", cOff, "mem off:", mOff)
+			fmt.Println("len:", l, "code off:", cOff, "mem off:", mOff)
 
 			mem.Set(mOff, l, code)
-			//fmt.Println(Code(mem.Get(mOff, l)))
 		case GASPRICE:
 			stack.Push(closure.Price)
 
@@ -673,6 +672,8 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
 			stack.Push(pc)
 		case MSIZE:
 			stack.Push(big.NewInt(int64(mem.Len())))
+
+			vm.Printf(" => %v", mem.Len()).Endl()
 		case GAS:
 			stack.Push(closure.Gas)
 			// 0x60 range