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@ -43,8 +43,14 @@ type StateDB struct { |
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db ethdb.Database |
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trie *trie.SecureTrie |
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stateObjects map[string]*StateObject |
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// This map caches canon state accounts.
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all map[common.Address]Account |
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// This map holds 'live' objects, which will get modified while processing a state transition.
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stateObjects map[common.Address]*StateObject |
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stateObjectsDirty map[common.Address]struct{} |
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// The refund counter, also used by state transitioning.
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refund *big.Int |
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thash, bhash common.Hash |
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@ -62,7 +68,9 @@ func New(root common.Hash, db ethdb.Database) (*StateDB, error) { |
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return &StateDB{ |
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db: db, |
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trie: tr, |
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stateObjects: make(map[string]*StateObject), |
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all: make(map[common.Address]Account), |
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stateObjects: make(map[common.Address]*StateObject), |
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stateObjectsDirty: make(map[common.Address]struct{}), |
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refund: new(big.Int), |
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logs: make(map[common.Hash]vm.Logs), |
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}, nil |
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@ -71,19 +79,21 @@ func New(root common.Hash, db ethdb.Database) (*StateDB, error) { |
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// Reset clears out all emphemeral state objects from the state db, but keeps
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// the underlying state trie to avoid reloading data for the next operations.
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func (self *StateDB) Reset(root common.Hash) error { |
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var ( |
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err error |
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tr = self.trie |
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) |
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if self.trie.Hash() != root { |
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if tr, err = trie.NewSecure(root, self.db); err != nil { |
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tr, err := trie.NewSecure(root, self.db) |
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if err != nil { |
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return err |
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} |
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all := self.all |
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if self.trie.Hash() != root { |
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// The root has changed, invalidate canon state.
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all = make(map[common.Address]Account) |
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} |
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*self = StateDB{ |
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db: self.db, |
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trie: tr, |
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stateObjects: make(map[string]*StateObject), |
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all: all, |
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stateObjects: make(map[common.Address]*StateObject), |
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stateObjectsDirty: make(map[common.Address]struct{}), |
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refund: new(big.Int), |
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logs: make(map[common.Hash]vm.Logs), |
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} |
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@ -137,7 +147,7 @@ func (self *StateDB) GetAccount(addr common.Address) vm.Account { |
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func (self *StateDB) GetBalance(addr common.Address) *big.Int { |
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stateObject := self.GetStateObject(addr) |
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if stateObject != nil { |
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return stateObject.balance |
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return stateObject.Balance() |
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} |
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return common.Big0 |
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@ -146,7 +156,7 @@ func (self *StateDB) GetBalance(addr common.Address) *big.Int { |
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func (self *StateDB) GetNonce(addr common.Address) uint64 { |
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stateObject := self.GetStateObject(addr) |
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if stateObject != nil { |
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return stateObject.nonce |
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return stateObject.Nonce() |
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} |
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return StartingNonce |
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@ -155,18 +165,24 @@ func (self *StateDB) GetNonce(addr common.Address) uint64 { |
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func (self *StateDB) GetCode(addr common.Address) []byte { |
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stateObject := self.GetStateObject(addr) |
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if stateObject != nil { |
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return stateObject.code |
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return stateObject.Code(self.db) |
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} |
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return nil |
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} |
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func (self *StateDB) GetCodeSize(addr common.Address) int { |
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stateObject := self.GetStateObject(addr) |
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if stateObject != nil { |
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return stateObject.CodeSize(self.db) |
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} |
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return 0 |
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} |
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func (self *StateDB) GetState(a common.Address, b common.Hash) common.Hash { |
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stateObject := self.GetStateObject(a) |
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if stateObject != nil { |
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return stateObject.GetState(b) |
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return stateObject.GetState(self.db, b) |
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} |
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return common.Hash{} |
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} |
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@ -214,8 +230,7 @@ func (self *StateDB) Delete(addr common.Address) bool { |
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stateObject := self.GetStateObject(addr) |
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if stateObject != nil { |
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stateObject.MarkForDeletion() |
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stateObject.balance = new(big.Int) |
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stateObject.data.Balance = new(big.Int) |
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return true |
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} |
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@ -242,35 +257,47 @@ func (self *StateDB) DeleteStateObject(stateObject *StateObject) { |
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addr := stateObject.Address() |
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self.trie.Delete(addr[:]) |
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//delete(self.stateObjects, addr.Str())
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} |
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// Retrieve a state object given my the address. Nil if not found
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// Retrieve a state object given my the address. Returns nil if not found.
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func (self *StateDB) GetStateObject(addr common.Address) (stateObject *StateObject) { |
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stateObject = self.stateObjects[addr.Str()] |
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if stateObject != nil { |
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if stateObject.deleted { |
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stateObject = nil |
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// Prefer 'live' objects.
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if obj := self.stateObjects[addr]; obj != nil { |
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if obj.deleted { |
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return nil |
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} |
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return obj |
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} |
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return stateObject |
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// Use cached account data from the canon state if possible.
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if data, ok := self.all[addr]; ok { |
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obj := NewObject(addr, data, self.MarkStateObjectDirty) |
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self.SetStateObject(obj) |
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return obj |
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} |
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data := self.trie.Get(addr[:]) |
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if len(data) == 0 { |
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// Load the object from the database.
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enc := self.trie.Get(addr[:]) |
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if len(enc) == 0 { |
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return nil |
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} |
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stateObject, err := DecodeObject(addr, self.db, data) |
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if err != nil { |
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var data Account |
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if err := rlp.DecodeBytes(enc, &data); err != nil { |
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glog.Errorf("can't decode object at %x: %v", addr[:], err) |
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return nil |
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} |
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self.SetStateObject(stateObject) |
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return stateObject |
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// Update the all cache. Content in DB always corresponds
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// to the current head state so this is ok to do here.
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// The object we just loaded has no storage trie and code yet.
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self.all[addr] = data |
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// Insert into the live set.
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obj := NewObject(addr, data, self.MarkStateObjectDirty) |
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self.SetStateObject(obj) |
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return obj |
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} |
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func (self *StateDB) SetStateObject(object *StateObject) { |
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self.stateObjects[object.Address().Str()] = object |
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self.stateObjects[object.Address()] = object |
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} |
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// Retrieve a state object or create a new state object if nil
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@ -288,15 +315,19 @@ func (self *StateDB) newStateObject(addr common.Address) *StateObject { |
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if glog.V(logger.Core) { |
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glog.Infof("(+) %x\n", addr) |
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} |
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obj := NewObject(addr, Account{}, self.MarkStateObjectDirty) |
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obj.SetNonce(StartingNonce) // sets the object to dirty
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self.stateObjects[addr] = obj |
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return obj |
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} |
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stateObject := NewStateObject(addr, self.db) |
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stateObject.SetNonce(StartingNonce) |
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self.stateObjects[addr.Str()] = stateObject |
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return stateObject |
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// MarkStateObjectDirty adds the specified object to the dirty map to avoid costly
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// state object cache iteration to find a handful of modified ones.
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func (self *StateDB) MarkStateObjectDirty(addr common.Address) { |
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self.stateObjectsDirty[addr] = struct{}{} |
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} |
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// Creates creates a new state object and takes ownership. This is different from "NewStateObject"
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// Creates creates a new state object and takes ownership.
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func (self *StateDB) CreateStateObject(addr common.Address) *StateObject { |
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// Get previous (if any)
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so := self.GetStateObject(addr) |
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@ -305,7 +336,7 @@ func (self *StateDB) CreateStateObject(addr common.Address) *StateObject { |
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// If it existed set the balance to the new account
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if so != nil { |
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newSo.balance = so.balance |
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newSo.data.Balance = so.data.Balance |
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} |
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return newSo |
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@ -320,29 +351,34 @@ func (self *StateDB) CreateAccount(addr common.Address) vm.Account { |
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//
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func (self *StateDB) Copy() *StateDB { |
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// ignore error - we assume state-to-be-copied always exists
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state, _ := New(common.Hash{}, self.db) |
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state.trie = self.trie |
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for k, stateObject := range self.stateObjects { |
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if stateObject.dirty { |
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state.stateObjects[k] = stateObject.Copy() |
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} |
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// Copy all the basic fields, initialize the memory ones
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state := &StateDB{ |
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db: self.db, |
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trie: self.trie, |
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all: self.all, |
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stateObjects: make(map[common.Address]*StateObject, len(self.stateObjectsDirty)), |
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stateObjectsDirty: make(map[common.Address]struct{}, len(self.stateObjectsDirty)), |
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refund: new(big.Int).Set(self.refund), |
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logs: make(map[common.Hash]vm.Logs, len(self.logs)), |
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logSize: self.logSize, |
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} |
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// Copy the dirty states and logs
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for addr, _ := range self.stateObjectsDirty { |
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state.stateObjects[addr] = self.stateObjects[addr].Copy(self.db, state.MarkStateObjectDirty) |
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state.stateObjectsDirty[addr] = struct{}{} |
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} |
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state.refund.Set(self.refund) |
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for hash, logs := range self.logs { |
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state.logs[hash] = make(vm.Logs, len(logs)) |
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copy(state.logs[hash], logs) |
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} |
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state.logSize = self.logSize |
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return state |
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} |
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func (self *StateDB) Set(state *StateDB) { |
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self.trie = state.trie |
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self.stateObjects = state.stateObjects |
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self.stateObjectsDirty = state.stateObjectsDirty |
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self.all = state.all |
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self.refund = state.refund |
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self.logs = state.logs |
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@ -358,16 +394,15 @@ func (self *StateDB) GetRefund() *big.Int { |
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// goes into transaction receipts.
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func (s *StateDB) IntermediateRoot() common.Hash { |
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s.refund = new(big.Int) |
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for _, stateObject := range s.stateObjects { |
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if stateObject.dirty { |
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for addr, _ := range s.stateObjectsDirty { |
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stateObject := s.stateObjects[addr] |
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if stateObject.remove { |
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s.DeleteStateObject(stateObject) |
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} else { |
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stateObject.Update() |
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stateObject.UpdateRoot(s.db) |
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s.UpdateStateObject(stateObject) |
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} |
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} |
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} |
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return s.trie.Hash() |
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} |
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@ -380,15 +415,15 @@ func (s *StateDB) DeleteSuicides() { |
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// Reset refund so that any used-gas calculations can use
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// this method.
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s.refund = new(big.Int) |
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for _, stateObject := range s.stateObjects { |
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if stateObject.dirty { |
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for addr, _ := range s.stateObjectsDirty { |
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stateObject := s.stateObjects[addr] |
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// If the object has been removed by a suicide
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// flag the object as deleted.
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if stateObject.remove { |
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stateObject.deleted = true |
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} |
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stateObject.dirty = false |
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} |
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delete(s.stateObjectsDirty, addr) |
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} |
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} |
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@ -407,46 +442,44 @@ func (s *StateDB) CommitBatch() (root common.Hash, batch ethdb.Batch) { |
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return root, batch |
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} |
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func (s *StateDB) commit(db trie.DatabaseWriter) (common.Hash, error) { |
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func (s *StateDB) commit(dbw trie.DatabaseWriter) (root common.Hash, err error) { |
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s.refund = new(big.Int) |
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defer func() { |
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if err != nil { |
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// Committing failed, any updates to the canon state are invalid.
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s.all = make(map[common.Address]Account) |
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} |
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}() |
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for _, stateObject := range s.stateObjects { |
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// Commit objects to the trie.
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for addr, stateObject := range s.stateObjects { |
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if stateObject.remove { |
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// If the object has been removed, don't bother syncing it
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// and just mark it for deletion in the trie.
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s.DeleteStateObject(stateObject) |
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} else { |
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delete(s.all, addr) |
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} else if _, ok := s.stateObjectsDirty[addr]; ok { |
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// Write any contract code associated with the state object
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if len(stateObject.code) > 0 { |
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if err := db.Put(stateObject.codeHash, stateObject.code); err != nil { |
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if stateObject.code != nil && stateObject.dirtyCode { |
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if err := dbw.Put(stateObject.CodeHash(), stateObject.code); err != nil { |
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return common.Hash{}, err |
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} |
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stateObject.dirtyCode = false |
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} |
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// Write any storage changes in the state object to its trie.
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stateObject.Update() |
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// Commit the trie of the object to the batch.
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// This updates the trie root internally, so
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// getting the root hash of the storage trie
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// through UpdateStateObject is fast.
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if _, err := stateObject.trie.CommitTo(db); err != nil { |
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// Write any storage changes in the state object to its storage trie.
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if err := stateObject.CommitTrie(s.db, dbw); err != nil { |
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|
return common.Hash{}, err |
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} |
|
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// Update the object in the account trie.
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|
|
|
// Update the object in the main account trie.
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s.UpdateStateObject(stateObject) |
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|
s.all[addr] = stateObject.data |
|
|
|
|
} |
|
|
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|
stateObject.dirty = false |
|
|
|
|
delete(s.stateObjectsDirty, addr) |
|
|
|
|
} |
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|
|
|
return s.trie.CommitTo(db) |
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|
// Write trie changes.
|
|
|
|
|
return s.trie.CommitTo(dbw) |
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|
|
} |
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func (self *StateDB) Refunds() *big.Int { |
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|
return self.refund |
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} |
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// Debug stuff
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|
|
func (self *StateDB) CreateOutputForDiff() { |
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|
|
for _, stateObject := range self.stateObjects { |
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|
|
stateObject.CreateOutputForDiff() |
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} |
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} |
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Péter Szilágyi
8 years ago
committed by
GitHub