283 lines
8.1 KiB
Go
283 lines
8.1 KiB
Go
package vm
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/hex"
|
|
"fmt"
|
|
"reflect"
|
|
"strings"
|
|
|
|
"github.com/filecoin-project/specs-actors/actors/abi"
|
|
"github.com/filecoin-project/specs-actors/actors/builtin/miner"
|
|
"github.com/ipfs/go-cid"
|
|
cbg "github.com/whyrusleeping/cbor-gen"
|
|
"golang.org/x/xerrors"
|
|
|
|
"github.com/filecoin-project/specs-actors/actors/builtin/multisig"
|
|
vmr "github.com/filecoin-project/specs-actors/actors/runtime"
|
|
|
|
"github.com/filecoin-project/specs-actors/actors/builtin/market"
|
|
|
|
"github.com/filecoin-project/lotus/chain/actors"
|
|
"github.com/filecoin-project/lotus/chain/actors/aerrors"
|
|
"github.com/filecoin-project/lotus/chain/types"
|
|
)
|
|
|
|
type invoker struct {
|
|
builtInCode map[cid.Cid]nativeCode
|
|
builtInState map[cid.Cid]reflect.Type
|
|
}
|
|
|
|
type invokeFunc func(act *types.Actor, vmctx types.VMContext, params []byte) ([]byte, aerrors.ActorError)
|
|
type nativeCode []invokeFunc
|
|
|
|
func NewInvoker() *invoker {
|
|
inv := &invoker{
|
|
builtInCode: make(map[cid.Cid]nativeCode),
|
|
builtInState: make(map[cid.Cid]reflect.Type),
|
|
}
|
|
|
|
// add builtInCode using: register(cid, singleton)
|
|
inv.Register(actors.InitCodeCid, actors.InitActor{}, actors.InitActorState{})
|
|
inv.Register(actors.CronCodeCid, actors.CronActor{}, actors.CronActorState{})
|
|
inv.Register(actors.StoragePowerCodeCid, actors.StoragePowerActor{}, actors.StoragePowerState{})
|
|
inv.Register(actors.StorageMarketCodeCid, market.Actor{}, market.State{})
|
|
inv.Register(actors.StorageMinerCodeCid, miner.Actor{}, miner.State{})
|
|
inv.Register(actors.MultisigCodeCid, multisig.Actor{}, multisig.State{})
|
|
inv.Register(actors.PaymentChannelCodeCid, actors.PaymentChannelActor{}, actors.PaymentChannelActorState{})
|
|
|
|
return inv
|
|
}
|
|
|
|
func (inv *invoker) Invoke(act *types.Actor, vmctx types.VMContext, method abi.MethodNum, params []byte) ([]byte, aerrors.ActorError) {
|
|
|
|
if act.Code == actors.AccountCodeCid {
|
|
return nil, aerrors.Newf(254, "cannot invoke methods on account actors")
|
|
}
|
|
|
|
code, ok := inv.builtInCode[act.Code]
|
|
if !ok {
|
|
log.Errorf("no code for actor %s (Addr: %s)", act.Code, vmctx.Message().To)
|
|
return nil, aerrors.Newf(255, "no code for actor %s(%d)(%s)", act.Code, method, hex.EncodeToString(params))
|
|
}
|
|
if method >= abi.MethodNum(len(code)) || code[method] == nil {
|
|
return nil, aerrors.Newf(255, "no method %d on actor", method)
|
|
}
|
|
return code[method](act, vmctx, params)
|
|
|
|
}
|
|
|
|
func (inv *invoker) Register(c cid.Cid, instance Invokee, state interface{}) {
|
|
code, err := inv.transform(instance)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
inv.builtInCode[c] = code
|
|
inv.builtInState[c] = reflect.TypeOf(state)
|
|
}
|
|
|
|
type Invokee interface {
|
|
Exports() []interface{}
|
|
}
|
|
|
|
var tVMContext = reflect.TypeOf((*types.VMContext)(nil)).Elem()
|
|
var tAError = reflect.TypeOf((*aerrors.ActorError)(nil)).Elem()
|
|
|
|
func (i *invoker) transform(instance Invokee) (nativeCode, error) {
|
|
itype := reflect.TypeOf(instance)
|
|
if strings.Contains(itype.PkgPath(), "github.com/filecoin-project/specs-actors/") {
|
|
return i.transformSpec(instance)
|
|
} else {
|
|
return i.transformLotus(instance)
|
|
}
|
|
|
|
}
|
|
|
|
func (*invoker) transformSpec(instance Invokee) (nativeCode, error) {
|
|
itype := reflect.TypeOf(instance)
|
|
exports := instance.Exports()
|
|
for i, m := range exports {
|
|
i := i
|
|
newErr := func(format string, args ...interface{}) error {
|
|
str := fmt.Sprintf(format, args...)
|
|
return fmt.Errorf("transform(%s) export(%d): %s", itype.Name(), i, str)
|
|
}
|
|
|
|
if m == nil {
|
|
continue
|
|
}
|
|
|
|
meth := reflect.ValueOf(m)
|
|
t := meth.Type()
|
|
if t.Kind() != reflect.Func {
|
|
return nil, newErr("is not a function")
|
|
}
|
|
if t.NumIn() != 2 {
|
|
return nil, newErr("wrong number of inputs should be: " +
|
|
"vmr.Runtime, <parameter>")
|
|
}
|
|
if t.In(0) != reflect.TypeOf((*vmr.Runtime)(nil)).Elem() {
|
|
return nil, newErr("first arguemnt should be vmr.Runtime")
|
|
}
|
|
if t.In(1).Kind() != reflect.Ptr {
|
|
return nil, newErr("second argument should be types.VMContext")
|
|
}
|
|
|
|
if t.NumOut() != 1 {
|
|
return nil, newErr("wrong number of outputs should be: " +
|
|
"cbg.CBORMarshaler")
|
|
}
|
|
o0 := t.Out(0)
|
|
if !o0.Implements(reflect.TypeOf((*cbg.CBORMarshaler)(nil)).Elem()) {
|
|
return nil, newErr("output needs to implement cgb.CBORMarshaler")
|
|
|
|
}
|
|
}
|
|
code := make(nativeCode, len(exports))
|
|
for id, m := range exports {
|
|
meth := reflect.ValueOf(m)
|
|
code[id] = reflect.MakeFunc(reflect.TypeOf((invokeFunc)(nil)),
|
|
func(in []reflect.Value) []reflect.Value {
|
|
paramT := meth.Type().In(1).Elem()
|
|
param := reflect.New(paramT)
|
|
|
|
inBytes := in[2].Interface().([]byte)
|
|
if len(inBytes) > 0 {
|
|
if err := DecodeParams(inBytes, param.Interface()); err != nil {
|
|
aerr := aerrors.Absorb(err, 1, "failed to decode parameters")
|
|
return []reflect.Value{
|
|
reflect.ValueOf([]byte{}),
|
|
// Below is a hack, fixed in Go 1.13
|
|
// https://git.io/fjXU6
|
|
reflect.ValueOf(&aerr).Elem(),
|
|
}
|
|
}
|
|
}
|
|
shim := &runtimeShim{vmctx: in[1].Interface().(*VMContext)}
|
|
rval, aerror := shim.shimCall(func() interface{} {
|
|
ret := meth.Call([]reflect.Value{
|
|
reflect.ValueOf(shim),
|
|
param,
|
|
})
|
|
return ret[0].Interface()
|
|
})
|
|
|
|
return []reflect.Value{
|
|
reflect.ValueOf(&rval).Elem(),
|
|
reflect.ValueOf(&aerror).Elem(),
|
|
}
|
|
}).Interface().(invokeFunc)
|
|
|
|
}
|
|
return code, nil
|
|
}
|
|
|
|
func (*invoker) transformLotus(instance Invokee) (nativeCode, error) {
|
|
itype := reflect.TypeOf(instance)
|
|
exports := instance.Exports()
|
|
for i, m := range exports {
|
|
i := i
|
|
newErr := func(format string, args ...interface{}) error {
|
|
str := fmt.Sprintf(format, args...)
|
|
return fmt.Errorf("transform(%s) export(%d): %s", itype.Name(), i, str)
|
|
}
|
|
if m == nil {
|
|
continue
|
|
}
|
|
meth := reflect.ValueOf(m)
|
|
t := meth.Type()
|
|
if t.Kind() != reflect.Func {
|
|
return nil, newErr("is not a function")
|
|
}
|
|
if t.NumIn() != 3 {
|
|
return nil, newErr("wrong number of inputs should be: " +
|
|
"*types.Actor, *VMContext, <type of parameter>")
|
|
}
|
|
if t.In(0) != reflect.TypeOf(&types.Actor{}) {
|
|
return nil, newErr("first arguemnt should be *types.Actor")
|
|
}
|
|
if t.In(1) != tVMContext {
|
|
return nil, newErr("second argument should be types.VMContext")
|
|
}
|
|
|
|
if t.In(2).Kind() != reflect.Ptr {
|
|
return nil, newErr("parameter has to be a pointer to parameter, is: %s",
|
|
t.In(2).Kind())
|
|
}
|
|
|
|
if t.NumOut() != 2 {
|
|
return nil, newErr("wrong number of outputs should be: " +
|
|
"(InvokeRet, error)")
|
|
}
|
|
if t.Out(0) != reflect.TypeOf([]byte{}) {
|
|
return nil, newErr("first output should be slice of bytes")
|
|
}
|
|
if !t.Out(1).Implements(tAError) {
|
|
return nil, newErr("second output should be ActorError type")
|
|
}
|
|
|
|
}
|
|
code := make(nativeCode, len(exports))
|
|
for id, m := range exports {
|
|
meth := reflect.ValueOf(m)
|
|
code[id] = reflect.MakeFunc(reflect.TypeOf((invokeFunc)(nil)),
|
|
func(in []reflect.Value) []reflect.Value {
|
|
paramT := meth.Type().In(2).Elem()
|
|
param := reflect.New(paramT)
|
|
|
|
inBytes := in[2].Interface().([]byte)
|
|
if len(inBytes) > 0 {
|
|
if err := DecodeParams(inBytes, param.Interface()); err != nil {
|
|
aerr := aerrors.Absorb(err, 1, "failed to decode parameters")
|
|
return []reflect.Value{
|
|
reflect.ValueOf([]byte{}),
|
|
// Below is a hack, fixed in Go 1.13
|
|
// https://git.io/fjXU6
|
|
reflect.ValueOf(&aerr).Elem(),
|
|
}
|
|
}
|
|
}
|
|
|
|
return meth.Call([]reflect.Value{
|
|
in[0], in[1], param,
|
|
})
|
|
}).Interface().(invokeFunc)
|
|
|
|
}
|
|
return code, nil
|
|
}
|
|
|
|
func DecodeParams(b []byte, out interface{}) error {
|
|
um, ok := out.(cbg.CBORUnmarshaler)
|
|
if !ok {
|
|
return fmt.Errorf("type %T does not implement UnmarshalCBOR", out)
|
|
}
|
|
|
|
return um.UnmarshalCBOR(bytes.NewReader(b))
|
|
}
|
|
|
|
func DumpActorState(code cid.Cid, b []byte) (interface{}, error) {
|
|
if code == actors.AccountCodeCid { // Account code special case
|
|
return nil, nil
|
|
}
|
|
|
|
i := NewInvoker() // TODO: register builtins in init block
|
|
|
|
typ, ok := i.builtInState[code]
|
|
if !ok {
|
|
return nil, xerrors.Errorf("state type for actor %s not found", code)
|
|
}
|
|
|
|
rv := reflect.New(typ)
|
|
um, ok := rv.Interface().(cbg.CBORUnmarshaler)
|
|
if !ok {
|
|
return nil, xerrors.New("state type does not implement CBORUnmarshaler")
|
|
}
|
|
|
|
if err := um.UnmarshalCBOR(bytes.NewReader(b)); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return rv.Elem().Interface(), nil
|
|
}
|