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core/state: track all accounts in canon state

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This change introduces a global, per-state cache that keeps account data
in the canon state. Thanks to @karalabe for lots of fixes.
This commit is contained in:
Felix Lange
2016-09-22 21:04:58 +02:00
parent e859f36967
commit a59a93f476
17 changed files with 417 additions and 339 deletions
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233
core/state/statedb.go
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@ -43,8 +43,14 @@ type StateDB struct {
db ethdb.Database
trie *trie.SecureTrie
stateObjects map[string]*StateObject
// This map caches canon state accounts.
all map[common.Address]Account
// This map holds 'live' objects, which will get modified while processing a state transition.
stateObjects map[common.Address]*StateObject
stateObjectsDirty map[common.Address]struct{}
// The refund counter, also used by state transitioning.
refund *big.Int
thash, bhash common.Hash
@ -60,32 +66,36 @@ func New(root common.Hash, db ethdb.Database) (*StateDB, error) {
return nil, err
}
return &StateDB{
db: db,
trie: tr,
stateObjects: make(map[string]*StateObject),
refund: new(big.Int),
logs: make(map[common.Hash]vm.Logs),
db: db,
trie: tr,
all: make(map[common.Address]Account),
stateObjects: make(map[common.Address]*StateObject),
stateObjectsDirty: make(map[common.Address]struct{}),
refund: new(big.Int),
logs: make(map[common.Hash]vm.Logs),
}, nil
}
// Reset clears out all emphemeral state objects from the state db, but keeps
// the underlying state trie to avoid reloading data for the next operations.
func (self *StateDB) Reset(root common.Hash) error {
var (
err error
tr = self.trie
)
tr, err := trie.NewSecure(root, self.db)
if err != nil {
return err
}
all := self.all
if self.trie.Hash() != root {
if tr, err = trie.NewSecure(root, self.db); err != nil {
return err
}
// The root has changed, invalidate canon state.
all = make(map[common.Address]Account)
}
*self = StateDB{
db: self.db,
trie: tr,
stateObjects: make(map[string]*StateObject),
refund: new(big.Int),
logs: make(map[common.Hash]vm.Logs),
db: self.db,
trie: tr,
all: all,
stateObjects: make(map[common.Address]*StateObject),
stateObjectsDirty: make(map[common.Address]struct{}),
refund: new(big.Int),
logs: make(map[common.Hash]vm.Logs),
}
return nil
}
@ -137,7 +147,7 @@ func (self *StateDB) GetAccount(addr common.Address) vm.Account {
func (self *StateDB) GetBalance(addr common.Address) *big.Int {
stateObject := self.GetStateObject(addr)
if stateObject != nil {
return stateObject.balance
return stateObject.Balance()
}
return common.Big0
@ -146,7 +156,7 @@ func (self *StateDB) GetBalance(addr common.Address) *big.Int {
func (self *StateDB) GetNonce(addr common.Address) uint64 {
stateObject := self.GetStateObject(addr)
if stateObject != nil {
return stateObject.nonce
return stateObject.Nonce()
}
return StartingNonce
@ -155,18 +165,24 @@ func (self *StateDB) GetNonce(addr common.Address) uint64 {
func (self *StateDB) GetCode(addr common.Address) []byte {
stateObject := self.GetStateObject(addr)
if stateObject != nil {
return stateObject.code
return stateObject.Code(self.db)
}
return nil
}
func (self *StateDB) GetCodeSize(addr common.Address) int {
stateObject := self.GetStateObject(addr)
if stateObject != nil {
return stateObject.CodeSize(self.db)
}
return 0
}
func (self *StateDB) GetState(a common.Address, b common.Hash) common.Hash {
stateObject := self.GetStateObject(a)
if stateObject != nil {
return stateObject.GetState(b)
return stateObject.GetState(self.db, b)
}
return common.Hash{}
}
@ -214,8 +230,7 @@ func (self *StateDB) Delete(addr common.Address) bool {
stateObject := self.GetStateObject(addr)
if stateObject != nil {
stateObject.MarkForDeletion()
stateObject.balance = new(big.Int)
stateObject.data.Balance = new(big.Int)
return true
}
@ -242,35 +257,47 @@ func (self *StateDB) DeleteStateObject(stateObject *StateObject) {
addr := stateObject.Address()
self.trie.Delete(addr[:])
//delete(self.stateObjects, addr.Str())
}
// Retrieve a state object given my the address. Nil if not found
// Retrieve a state object given my the address. Returns nil if not found.
func (self *StateDB) GetStateObject(addr common.Address) (stateObject *StateObject) {
stateObject = self.stateObjects[addr.Str()]
if stateObject != nil {
if stateObject.deleted {
stateObject = nil
// Prefer 'live' objects.
if obj := self.stateObjects[addr]; obj != nil {
if obj.deleted {
return nil
}
return stateObject
return obj
}
data := self.trie.Get(addr[:])
if len(data) == 0 {
// Use cached account data from the canon state if possible.
if data, ok := self.all[addr]; ok {
obj := NewObject(addr, data, self.MarkStateObjectDirty)
self.SetStateObject(obj)
return obj
}
// Load the object from the database.
enc := self.trie.Get(addr[:])
if len(enc) == 0 {
return nil
}
stateObject, err := DecodeObject(addr, self.db, data)
if err != nil {
var data Account
if err := rlp.DecodeBytes(enc, &data); err != nil {
glog.Errorf("can't decode object at %x: %v", addr[:], err)
return nil
}
self.SetStateObject(stateObject)
return stateObject
// Update the all cache. Content in DB always corresponds
// to the current head state so this is ok to do here.
// The object we just loaded has no storage trie and code yet.
self.all[addr] = data
// Insert into the live set.
obj := NewObject(addr, data, self.MarkStateObjectDirty)
self.SetStateObject(obj)
return obj
}
func (self *StateDB) SetStateObject(object *StateObject) {
self.stateObjects[object.Address().Str()] = object
self.stateObjects[object.Address()] = object
}
// Retrieve a state object or create a new state object if nil
@ -288,15 +315,19 @@ func (self *StateDB) newStateObject(addr common.Address) *StateObject {
if glog.V(logger.Core) {
glog.Infof("(+) %x\n", addr)
}
stateObject := NewStateObject(addr, self.db)
stateObject.SetNonce(StartingNonce)
self.stateObjects[addr.Str()] = stateObject
return stateObject
obj := NewObject(addr, Account{}, self.MarkStateObjectDirty)
obj.SetNonce(StartingNonce) // sets the object to dirty
self.stateObjects[addr] = obj
return obj
}
// Creates creates a new state object and takes ownership. This is different from "NewStateObject"
// MarkStateObjectDirty adds the specified object to the dirty map to avoid costly
// state object cache iteration to find a handful of modified ones.
func (self *StateDB) MarkStateObjectDirty(addr common.Address) {
self.stateObjectsDirty[addr] = struct{}{}
}
// Creates creates a new state object and takes ownership.
func (self *StateDB) CreateStateObject(addr common.Address) *StateObject {
// Get previous (if any)
so := self.GetStateObject(addr)
@ -305,7 +336,7 @@ func (self *StateDB) CreateStateObject(addr common.Address) *StateObject {
// If it existed set the balance to the new account
if so != nil {
newSo.balance = so.balance
newSo.data.Balance = so.data.Balance
}
return newSo
@ -320,29 +351,34 @@ func (self *StateDB) CreateAccount(addr common.Address) vm.Account {
//
func (self *StateDB) Copy() *StateDB {
// ignore error - we assume state-to-be-copied always exists
state, _ := New(common.Hash{}, self.db)
state.trie = self.trie
for k, stateObject := range self.stateObjects {
if stateObject.dirty {
state.stateObjects[k] = stateObject.Copy()
}
// Copy all the basic fields, initialize the memory ones
state := &StateDB{
db: self.db,
trie: self.trie,
all: self.all,
stateObjects: make(map[common.Address]*StateObject, len(self.stateObjectsDirty)),
stateObjectsDirty: make(map[common.Address]struct{}, len(self.stateObjectsDirty)),
refund: new(big.Int).Set(self.refund),
logs: make(map[common.Hash]vm.Logs, len(self.logs)),
logSize: self.logSize,
}
// Copy the dirty states and logs
for addr, _ := range self.stateObjectsDirty {
state.stateObjects[addr] = self.stateObjects[addr].Copy(self.db, state.MarkStateObjectDirty)
state.stateObjectsDirty[addr] = struct{}{}
}
state.refund.Set(self.refund)
for hash, logs := range self.logs {
state.logs[hash] = make(vm.Logs, len(logs))
copy(state.logs[hash], logs)
}
state.logSize = self.logSize
return state
}
func (self *StateDB) Set(state *StateDB) {
self.trie = state.trie
self.stateObjects = state.stateObjects
self.stateObjectsDirty = state.stateObjectsDirty
self.all = state.all
self.refund = state.refund
self.logs = state.logs
@ -358,14 +394,13 @@ func (self *StateDB) GetRefund() *big.Int {
// goes into transaction receipts.
func (s *StateDB) IntermediateRoot() common.Hash {
s.refund = new(big.Int)
for _, stateObject := range s.stateObjects {
if stateObject.dirty {
if stateObject.remove {
s.DeleteStateObject(stateObject)
} else {
stateObject.Update()
s.UpdateStateObject(stateObject)
}
for addr, _ := range s.stateObjectsDirty {
stateObject := s.stateObjects[addr]
if stateObject.remove {
s.DeleteStateObject(stateObject)
} else {
stateObject.UpdateRoot(s.db)
s.UpdateStateObject(stateObject)
}
}
return s.trie.Hash()
@ -380,15 +415,15 @@ func (s *StateDB) DeleteSuicides() {
// Reset refund so that any used-gas calculations can use
// this method.
s.refund = new(big.Int)
for _, stateObject := range s.stateObjects {
if stateObject.dirty {
// If the object has been removed by a suicide
// flag the object as deleted.
if stateObject.remove {
stateObject.deleted = true
}
stateObject.dirty = false
for addr, _ := range s.stateObjectsDirty {
stateObject := s.stateObjects[addr]
// If the object has been removed by a suicide
// flag the object as deleted.
if stateObject.remove {
stateObject.deleted = true
}
delete(s.stateObjectsDirty, addr)
}
}
@ -407,46 +442,44 @@ func (s *StateDB) CommitBatch() (root common.Hash, batch ethdb.Batch) {
return root, batch
}
func (s *StateDB) commit(db trie.DatabaseWriter) (common.Hash, error) {
func (s *StateDB) commit(dbw trie.DatabaseWriter) (root common.Hash, err error) {
s.refund = new(big.Int)
defer func() {
if err != nil {
// Committing failed, any updates to the canon state are invalid.
s.all = make(map[common.Address]Account)
}
}()
for _, stateObject := range s.stateObjects {
// Commit objects to the trie.
for addr, stateObject := range s.stateObjects {
if stateObject.remove {
// If the object has been removed, don't bother syncing it
// and just mark it for deletion in the trie.
s.DeleteStateObject(stateObject)
} else {
delete(s.all, addr)
} else if _, ok := s.stateObjectsDirty[addr]; ok {
// Write any contract code associated with the state object
if len(stateObject.code) > 0 {
if err := db.Put(stateObject.codeHash, stateObject.code); err != nil {
if stateObject.code != nil && stateObject.dirtyCode {
if err := dbw.Put(stateObject.CodeHash(), stateObject.code); err != nil {
return common.Hash{}, err
}
stateObject.dirtyCode = false
}
// Write any storage changes in the state object to its trie.
stateObject.Update()
// Commit the trie of the object to the batch.
// This updates the trie root internally, so
// getting the root hash of the storage trie
// through UpdateStateObject is fast.
if _, err := stateObject.trie.CommitTo(db); err != nil {
// Write any storage changes in the state object to its storage trie.
if err := stateObject.CommitTrie(s.db, dbw); err != nil {
return common.Hash{}, err
}
// Update the object in the account trie.
// Update the object in the main account trie.
s.UpdateStateObject(stateObject)
s.all[addr] = stateObject.data
}
stateObject.dirty = false
delete(s.stateObjectsDirty, addr)
}
return s.trie.CommitTo(db)
// Write trie changes.
return s.trie.CommitTo(dbw)
}
func (self *StateDB) Refunds() *big.Int {
return self.refund
}
// Debug stuff
func (self *StateDB) CreateOutputForDiff() {
for _, stateObject := range self.stateObjects {
stateObject.CreateOutputForDiff()
}
}