0e2784cd2c
It doesn't really change anything in most of the cases, but it's a useful habit anyway. Fix #350.
261 lines
6.9 KiB
Go
261 lines
6.9 KiB
Go
package vm
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"sort"
|
|
|
|
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
|
|
"github.com/nspcc-dev/neo-go/pkg/vm/emit"
|
|
"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
|
|
)
|
|
|
|
// interopIDFuncPrice adds an ID to the InteropFuncPrice.
|
|
type interopIDFuncPrice struct {
|
|
ID uint32
|
|
Func func(vm *VM) error
|
|
Price int64
|
|
RequiredFlags smartcontract.CallFlag
|
|
}
|
|
|
|
var defaultVMInterops = []interopIDFuncPrice{
|
|
{ID: emit.InteropNameToID([]byte("System.Binary.Deserialize")),
|
|
Func: RuntimeDeserialize, Price: 500000},
|
|
{ID: emit.InteropNameToID([]byte("System.Binary.Serialize")),
|
|
Func: RuntimeSerialize, Price: 100000},
|
|
{ID: emit.InteropNameToID([]byte("System.Runtime.Log")),
|
|
Func: runtimeLog, Price: 1000000, RequiredFlags: smartcontract.AllowNotify},
|
|
{ID: emit.InteropNameToID([]byte("System.Runtime.Notify")),
|
|
Func: runtimeNotify, Price: 1000000, RequiredFlags: smartcontract.AllowNotify},
|
|
{ID: emit.InteropNameToID([]byte("System.Enumerator.Create")),
|
|
Func: EnumeratorCreate, Price: 400},
|
|
{ID: emit.InteropNameToID([]byte("System.Enumerator.Next")),
|
|
Func: EnumeratorNext, Price: 1000000},
|
|
{ID: emit.InteropNameToID([]byte("System.Enumerator.Concat")),
|
|
Func: EnumeratorConcat, Price: 400},
|
|
{ID: emit.InteropNameToID([]byte("System.Enumerator.Value")),
|
|
Func: EnumeratorValue, Price: 400},
|
|
{ID: emit.InteropNameToID([]byte("System.Iterator.Create")),
|
|
Func: IteratorCreate, Price: 400},
|
|
{ID: emit.InteropNameToID([]byte("System.Iterator.Concat")),
|
|
Func: IteratorConcat, Price: 400},
|
|
{ID: emit.InteropNameToID([]byte("System.Iterator.Key")),
|
|
Func: IteratorKey, Price: 400},
|
|
{ID: emit.InteropNameToID([]byte("System.Iterator.Keys")),
|
|
Func: IteratorKeys, Price: 400},
|
|
{ID: emit.InteropNameToID([]byte("System.Iterator.Values")),
|
|
Func: IteratorValues, Price: 400},
|
|
}
|
|
|
|
func init() {
|
|
sort.Slice(defaultVMInterops, func(i, j int) bool { return defaultVMInterops[i].ID < defaultVMInterops[j].ID })
|
|
}
|
|
|
|
func defaultSyscallHandler(v *VM, id uint32) error {
|
|
n := sort.Search(len(defaultVMInterops), func(i int) bool {
|
|
return defaultVMInterops[i].ID >= id
|
|
})
|
|
if n >= len(defaultVMInterops) || defaultVMInterops[n].ID != id {
|
|
return errors.New("syscall not found")
|
|
}
|
|
d := defaultVMInterops[n]
|
|
if !v.Context().callFlag.Has(d.RequiredFlags) {
|
|
return fmt.Errorf("missing call flags: %05b vs %05b", v.Context().callFlag, d.RequiredFlags)
|
|
}
|
|
return d.Func(v)
|
|
}
|
|
|
|
// runtimeLog handles the syscall "System.Runtime.Log" for printing and logging stuff.
|
|
func runtimeLog(vm *VM) error {
|
|
msg := vm.Estack().Pop().String()
|
|
fmt.Printf("NEO-GO-VM (log) > %s\n", msg)
|
|
return nil
|
|
}
|
|
|
|
// runtimeNotify handles the syscall "System.Runtime.Notify" for printing and logging stuff.
|
|
func runtimeNotify(vm *VM) error {
|
|
name := vm.Estack().Pop().String()
|
|
item := vm.Estack().Pop()
|
|
fmt.Printf("NEO-GO-VM (notify) > [%s] %s\n", name, item.Value())
|
|
return nil
|
|
}
|
|
|
|
// RuntimeSerialize handles System.Binary.Serialize syscall.
|
|
func RuntimeSerialize(vm *VM) error {
|
|
item := vm.Estack().Pop()
|
|
data, err := stackitem.SerializeItem(item.value)
|
|
if err != nil {
|
|
return err
|
|
} else if len(data) > stackitem.MaxSize {
|
|
return errors.New("too big item")
|
|
}
|
|
|
|
vm.Estack().PushVal(data)
|
|
|
|
return nil
|
|
}
|
|
|
|
// RuntimeDeserialize handles System.Binary.Deserialize syscall.
|
|
func RuntimeDeserialize(vm *VM) error {
|
|
data := vm.Estack().Pop().Bytes()
|
|
|
|
item, err := stackitem.DeserializeItem(data)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
vm.Estack().Push(&Element{value: item})
|
|
|
|
return nil
|
|
}
|
|
|
|
// init sorts the global defaultVMInterops value.
|
|
func init() {
|
|
sort.Slice(defaultVMInterops, func(i, j int) bool {
|
|
return defaultVMInterops[i].ID < defaultVMInterops[j].ID
|
|
})
|
|
}
|
|
|
|
// EnumeratorCreate handles syscall System.Enumerator.Create.
|
|
func EnumeratorCreate(v *VM) error {
|
|
var interop interface{}
|
|
switch t := v.Estack().Pop().value.(type) {
|
|
case *stackitem.Array, *stackitem.Struct:
|
|
interop = &arrayWrapper{
|
|
index: -1,
|
|
value: t.Value().([]stackitem.Item),
|
|
}
|
|
default:
|
|
data, err := t.TryBytes()
|
|
if err != nil {
|
|
return fmt.Errorf("can not create enumerator from type %s: %w", t.Type(), err)
|
|
}
|
|
interop = &byteArrayWrapper{
|
|
index: -1,
|
|
value: data,
|
|
}
|
|
}
|
|
v.Estack().Push(&Element{
|
|
value: stackitem.NewInterop(interop),
|
|
})
|
|
|
|
return nil
|
|
}
|
|
|
|
// EnumeratorNext handles syscall System.Enumerator.Next.
|
|
func EnumeratorNext(v *VM) error {
|
|
iop := v.Estack().Pop().Interop()
|
|
arr := iop.Value().(enumerator)
|
|
v.Estack().PushVal(arr.Next())
|
|
|
|
return nil
|
|
}
|
|
|
|
// EnumeratorValue handles syscall System.Enumerator.Value.
|
|
func EnumeratorValue(v *VM) error {
|
|
iop := v.Estack().Pop().Interop()
|
|
arr := iop.Value().(enumerator)
|
|
v.Estack().Push(&Element{value: arr.Value()})
|
|
|
|
return nil
|
|
}
|
|
|
|
// EnumeratorConcat handles syscall System.Enumerator.Concat.
|
|
func EnumeratorConcat(v *VM) error {
|
|
iop1 := v.Estack().Pop().Interop()
|
|
arr1 := iop1.Value().(enumerator)
|
|
iop2 := v.Estack().Pop().Interop()
|
|
arr2 := iop2.Value().(enumerator)
|
|
|
|
v.Estack().Push(&Element{
|
|
value: stackitem.NewInterop(&concatEnum{
|
|
current: arr1,
|
|
second: arr2,
|
|
}),
|
|
})
|
|
|
|
return nil
|
|
}
|
|
|
|
// IteratorCreate handles syscall System.Iterator.Create.
|
|
func IteratorCreate(v *VM) error {
|
|
data := v.Estack().Pop()
|
|
var item stackitem.Item
|
|
switch t := data.value.(type) {
|
|
case *stackitem.Array, *stackitem.Struct:
|
|
item = stackitem.NewInterop(&arrayWrapper{
|
|
index: -1,
|
|
value: t.Value().([]stackitem.Item),
|
|
})
|
|
case *stackitem.Map:
|
|
item = NewMapIterator(t)
|
|
default:
|
|
data, err := t.TryBytes()
|
|
if err != nil {
|
|
return fmt.Errorf("non-iterable type %s", t.Type())
|
|
}
|
|
item = stackitem.NewInterop(&byteArrayWrapper{
|
|
index: -1,
|
|
value: data,
|
|
})
|
|
}
|
|
|
|
v.Estack().Push(&Element{value: item})
|
|
return nil
|
|
}
|
|
|
|
// NewMapIterator returns new interop item containing iterator over m.
|
|
func NewMapIterator(m *stackitem.Map) *stackitem.Interop {
|
|
return stackitem.NewInterop(&mapWrapper{
|
|
index: -1,
|
|
m: m.Value().([]stackitem.MapElement),
|
|
})
|
|
}
|
|
|
|
// IteratorConcat handles syscall System.Iterator.Concat.
|
|
func IteratorConcat(v *VM) error {
|
|
iop1 := v.Estack().Pop().Interop()
|
|
iter1 := iop1.Value().(iterator)
|
|
iop2 := v.Estack().Pop().Interop()
|
|
iter2 := iop2.Value().(iterator)
|
|
|
|
v.Estack().Push(&Element{value: stackitem.NewInterop(
|
|
&concatIter{
|
|
current: iter1,
|
|
second: iter2,
|
|
},
|
|
)})
|
|
|
|
return nil
|
|
}
|
|
|
|
// IteratorKey handles syscall System.Iterator.Key.
|
|
func IteratorKey(v *VM) error {
|
|
iop := v.estack.Pop().Interop()
|
|
iter := iop.Value().(iterator)
|
|
v.Estack().Push(&Element{value: iter.Key()})
|
|
|
|
return nil
|
|
}
|
|
|
|
// IteratorKeys handles syscall System.Iterator.Keys.
|
|
func IteratorKeys(v *VM) error {
|
|
iop := v.estack.Pop().Interop()
|
|
iter := iop.Value().(iterator)
|
|
v.Estack().Push(&Element{value: stackitem.NewInterop(
|
|
&keysWrapper{iter},
|
|
)})
|
|
|
|
return nil
|
|
}
|
|
|
|
// IteratorValues handles syscall System.Iterator.Values.
|
|
func IteratorValues(v *VM) error {
|
|
iop := v.estack.Pop().Interop()
|
|
iter := iop.Value().(iterator)
|
|
v.Estack().Push(&Element{value: stackitem.NewInterop(
|
|
&valuesWrapper{iter},
|
|
)})
|
|
|
|
return nil
|
|
}
|