core, trie: rework trie committer (ethereum#25320)

* all: rework trie and trie committer

* all: get rid of internal cache in trie

* all: fixes

* trie: polish

* core, trie: address comments

* trie: fix imports

* core/state: address comments

* core/state/snapshot: polish

* trie: remove unused code

* trie: update tests

* trie: don't set db as nil

* trie: address comments

* trie: unskip test

core/blockchain.go

@@ -1244,7 +1244,7 @@ func (bc *BlockChain) writeKnownBlock(block *types.Block) error {
 
 // writeBlockWithState writes block, metadata and corresponding state data to the
 // database.
-func (bc *BlockChain) writeBlockWithState(block *types.Block, receipts []*types.Receipt, logs []*types.Log, state *state.StateDB) error {
+func (bc *BlockChain) writeBlockWithState(block *types.Block, receipts []*types.Receipt, state *state.StateDB) error {
 	// Calculate the total difficulty of the block
 	ptd := bc.GetTd(block.ParentHash(), block.NumberU64()-1)
 	if ptd == nil {
@@ -1339,7 +1339,7 @@ func (bc *BlockChain) WriteBlockAndSetHead(block *types.Block, receipts []*types
 // writeBlockAndSetHead is the internal implementation of WriteBlockAndSetHead.
 // This function expects the chain mutex to be held.
 func (bc *BlockChain) writeBlockAndSetHead(block *types.Block, receipts []*types.Receipt, logs []*types.Log, state *state.StateDB, emitHeadEvent bool) (status WriteStatus, err error) {
-	if err := bc.writeBlockWithState(block, receipts, logs, state); err != nil {
+	if err := bc.writeBlockWithState(block, receipts, state); err != nil {
 		return NonStatTy, err
 	}
 	currentBlock := bc.CurrentBlock()
@@ -1703,7 +1703,7 @@ func (bc *BlockChain) insertChain(chain types.Blocks, verifySeals, setHead bool)
 		var status WriteStatus
 		if !setHead {
 			// Don't set the head, only insert the block
-			err = bc.writeBlockWithState(block, receipts, logs, statedb)
+			err = bc.writeBlockWithState(block, receipts, statedb)
 		} else {
 			status, err = bc.writeBlockAndSetHead(block, receipts, logs, statedb, false)
 		}

core/state/database.go

@@ -88,9 +88,13 @@ type Trie interface {
 	// can be used even if the trie doesn't have one.
 	Hash() common.Hash
 
-	// Commit writes all nodes to the trie's memory database, tracking the internal
-	// and external (for account tries) references.
-	Commit(onleaf trie.LeafCallback) (common.Hash, int, error)
+	// Commit collects all dirty nodes in the trie and replace them with the
+	// corresponding node hash. All collected nodes(including dirty leaves if
+	// collectLeaf is true) will be encapsulated into a nodeset for return.
+	// The returned nodeset can be nil if the trie is clean(nothing to commit).
+	// Once the trie is committed, it's not usable anymore. A new trie must
+	// be created with new root and updated trie database for following usage
+	Commit(collectLeaf bool) (common.Hash, *trie.NodeSet, error)
 
 	// NodeIterator returns an iterator that returns nodes of the trie. Iteration
 	// starts at the key after the given start key.

core/state/metrics.go

@@ -19,10 +19,10 @@ package state
 import "github.com/ethereum/go-ethereum/metrics"
 
 var (
-	accountUpdatedMeter   = metrics.NewRegisteredMeter("state/update/account", nil)
-	storageUpdatedMeter   = metrics.NewRegisteredMeter("state/update/storage", nil)
-	accountDeletedMeter   = metrics.NewRegisteredMeter("state/delete/account", nil)
-	storageDeletedMeter   = metrics.NewRegisteredMeter("state/delete/storage", nil)
-	accountCommittedMeter = metrics.NewRegisteredMeter("state/commit/account", nil)
-	storageCommittedMeter = metrics.NewRegisteredMeter("state/commit/storage", nil)
+	accountUpdatedMeter        = metrics.NewRegisteredMeter("state/update/account", nil)
+	storageUpdatedMeter        = metrics.NewRegisteredMeter("state/update/storage", nil)
+	accountDeletedMeter        = metrics.NewRegisteredMeter("state/delete/account", nil)
+	storageDeletedMeter        = metrics.NewRegisteredMeter("state/delete/storage", nil)
+	accountTrieCommittedMeter  = metrics.NewRegisteredMeter("state/commit/accountnodes", nil)
+	storageTriesCommittedMeter = metrics.NewRegisteredMeter("state/commit/storagenodes", nil)
 )

core/state/snapshot/generate.go

@@ -367,7 +367,10 @@ func (dl *diskLayer) generateRange(ctx *generatorContext, owner common.Hash, roo
 		for i, key := range result.keys {
 			snapTrie.Update(key, result.vals[i])
 		}
-		root, _, _ := snapTrie.Commit(nil)
+		root, nodes, _ := snapTrie.Commit(false)
+		if nodes != nil {
+			snapTrieDb.Update(trie.NewWithNodeSet(nodes))
+		}
 		snapTrieDb.Commit(root, false, nil)
 	}
 	// Construct the trie for state iteration, reuse the trie

core/state/snapshot/generate_test.go

@@ -143,6 +143,7 @@ type testHelper struct {
 	diskdb  ethdb.Database
 	triedb  *trie.Database
 	accTrie *trie.SecureTrie
+	nodes   *trie.MergedNodeSet
 }
 
 func newHelper() *testHelper {
@@ -153,6 +154,7 @@ func newHelper() *testHelper {
 		diskdb:  diskdb,
 		triedb:  triedb,
 		accTrie: accTrie,
+		nodes:   trie.NewMergedNodeSet(),
 	}
 }
 
@@ -184,17 +186,22 @@ func (t *testHelper) makeStorageTrie(stateRoot, owner common.Hash, keys []string
 	for i, k := range keys {
 		stTrie.Update([]byte(k), []byte(vals[i]))
 	}
-	var root common.Hash
 	if !commit {
-		root = stTrie.Hash()
-	} else {
-		root, _, _ = stTrie.Commit(nil)
+		return stTrie.Hash().Bytes()
+	}
+	root, nodes, _ := stTrie.Commit(false)
+	if nodes != nil {
+		t.nodes.Merge(nodes)
 	}
 	return root.Bytes()
 }
 
 func (t *testHelper) Commit() common.Hash {
-	root, _, _ := t.accTrie.Commit(nil)
+	root, nodes, _ := t.accTrie.Commit(true)
+	if nodes != nil {
+		t.nodes.Merge(nodes)
+	}
+	t.triedb.Update(t.nodes)
 	t.triedb.Commit(root, false, nil)
 	return root
 }
@@ -378,7 +385,7 @@ func TestGenerateCorruptAccountTrie(t *testing.T) {
 	helper.addTrieAccount("acc-2", &Account{Balance: big.NewInt(2), Root: emptyRoot.Bytes(), CodeHash: emptyCode.Bytes()}) // 0x65145f923027566669a1ae5ccac66f945b55ff6eaeb17d2ea8e048b7d381f2d7
 	helper.addTrieAccount("acc-3", &Account{Balance: big.NewInt(3), Root: emptyRoot.Bytes(), CodeHash: emptyCode.Bytes()}) // 0x19ead688e907b0fab07176120dceec244a72aff2f0aa51e8b827584e378772f4
 
-	root, _, _ := helper.accTrie.Commit(nil) // Root: 0xa04693ea110a31037fb5ee814308a6f1d76bdab0b11676bdf4541d2de55ba978
+	root := helper.Commit() // Root: 0xa04693ea110a31037fb5ee814308a6f1d76bdab0b11676bdf4541d2de55ba978
 
 	// Delete an account trie leaf and ensure the generator chokes
 	helper.triedb.Commit(root, false, nil)
@@ -413,18 +420,8 @@ func TestGenerateMissingStorageTrie(t *testing.T) {
 	helper.addTrieAccount("acc-2", &Account{Balance: big.NewInt(2), Root: emptyRoot.Bytes(), CodeHash: emptyCode.Bytes()})                                     // 0x65145f923027566669a1ae5ccac66f945b55ff6eaeb17d2ea8e048b7d381f2d7
 	stRoot = helper.makeStorageTrie(common.Hash{}, hashData([]byte("acc-3")), []string{"key-1", "key-2", "key-3"}, []string{"val-1", "val-2", "val-3"}, true)
 	helper.addTrieAccount("acc-3", &Account{Balance: big.NewInt(3), Root: stRoot, CodeHash: emptyCode.Bytes()}) // 0x50815097425d000edfc8b3a4a13e175fc2bdcfee8bdfbf2d1ff61041d3c235b2
-	root, _, _ := helper.accTrie.Commit(nil)
-
-	// We can only corrupt the disk database, so flush the tries out
-	helper.triedb.Reference(
-		common.BytesToHash(stRoot),
-		common.HexToHash("0x9250573b9c18c664139f3b6a7a8081b7d8f8916a8fcc5d94feec6c29f5fd4e9e"),
-	)
-	helper.triedb.Reference(
-		common.BytesToHash(stRoot),
-		common.HexToHash("0x50815097425d000edfc8b3a4a13e175fc2bdcfee8bdfbf2d1ff61041d3c235b2"),
-	)
-	helper.triedb.Commit(root, false, nil)
+
+	root := helper.Commit()
 
 	// Delete a storage trie root and ensure the generator chokes
 	helper.diskdb.Delete(stRoot)
@@ -458,18 +455,7 @@ func TestGenerateCorruptStorageTrie(t *testing.T) {
 	stRoot = helper.makeStorageTrie(common.Hash{}, hashData([]byte("acc-3")), []string{"key-1", "key-2", "key-3"}, []string{"val-1", "val-2", "val-3"}, true)
 	helper.addTrieAccount("acc-3", &Account{Balance: big.NewInt(3), Root: stRoot, CodeHash: emptyCode.Bytes()}) // 0x50815097425d000edfc8b3a4a13e175fc2bdcfee8bdfbf2d1ff61041d3c235b2
 
-	root, _, _ := helper.accTrie.Commit(nil)
-
-	// We can only corrupt the disk database, so flush the tries out
-	helper.triedb.Reference(
-		common.BytesToHash(stRoot),
-		common.HexToHash("0x9250573b9c18c664139f3b6a7a8081b7d8f8916a8fcc5d94feec6c29f5fd4e9e"),
-	)
-	helper.triedb.Reference(
-		common.BytesToHash(stRoot),
-		common.HexToHash("0x50815097425d000edfc8b3a4a13e175fc2bdcfee8bdfbf2d1ff61041d3c235b2"),
-	)
-	helper.triedb.Commit(root, false, nil)
+	root := helper.Commit()
 
 	// Delete a storage trie leaf and ensure the generator chokes
 	helper.diskdb.Delete(common.HexToHash("0x18a0f4d79cff4459642dd7604f303886ad9d77c30cf3d7d7cedb3a693ab6d371").Bytes())
@@ -825,10 +811,12 @@ func populateDangling(disk ethdb.KeyValueStore) {
 // This test will populate some dangling storages to see if they can be cleaned up.
 func TestGenerateCompleteSnapshotWithDanglingStorage(t *testing.T) {
 	var helper = newHelper()
-	stRoot := helper.makeStorageTrie(common.Hash{}, common.Hash{}, []string{"key-1", "key-2", "key-3"}, []string{"val-1", "val-2", "val-3"}, true)
 
+	stRoot := helper.makeStorageTrie(common.Hash{}, hashData([]byte("acc-1")), []string{"key-1", "key-2", "key-3"}, []string{"val-1", "val-2", "val-3"}, true)
 	helper.addAccount("acc-1", &Account{Balance: big.NewInt(1), Root: stRoot, CodeHash: emptyCode.Bytes()})
 	helper.addAccount("acc-2", &Account{Balance: big.NewInt(1), Root: emptyRoot.Bytes(), CodeHash: emptyCode.Bytes()})
+
+	helper.makeStorageTrie(common.Hash{}, hashData([]byte("acc-3")), []string{"key-1", "key-2", "key-3"}, []string{"val-1", "val-2", "val-3"}, true)
 	helper.addAccount("acc-3", &Account{Balance: big.NewInt(1), Root: stRoot, CodeHash: emptyCode.Bytes()})
 
 	helper.addSnapStorage("acc-1", []string{"key-1", "key-2", "key-3"}, []string{"val-1", "val-2", "val-3"})
@@ -858,10 +846,12 @@ func TestGenerateCompleteSnapshotWithDanglingStorage(t *testing.T) {
 // This test will populate some dangling storages to see if they can be cleaned up.
 func TestGenerateBrokenSnapshotWithDanglingStorage(t *testing.T) {
 	var helper = newHelper()
-	stRoot := helper.makeStorageTrie(common.Hash{}, common.Hash{}, []string{"key-1", "key-2", "key-3"}, []string{"val-1", "val-2", "val-3"}, true)
 
+	stRoot := helper.makeStorageTrie(common.Hash{}, hashData([]byte("acc-1")), []string{"key-1", "key-2", "key-3"}, []string{"val-1", "val-2", "val-3"}, true)
 	helper.addTrieAccount("acc-1", &Account{Balance: big.NewInt(1), Root: stRoot, CodeHash: emptyCode.Bytes()})
 	helper.addTrieAccount("acc-2", &Account{Balance: big.NewInt(2), Root: emptyRoot.Bytes(), CodeHash: emptyCode.Bytes()})
+
+	helper.makeStorageTrie(common.Hash{}, hashData([]byte("acc-3")), []string{"key-1", "key-2", "key-3"}, []string{"val-1", "val-2", "val-3"}, true)
 	helper.addTrieAccount("acc-3", &Account{Balance: big.NewInt(3), Root: stRoot, CodeHash: emptyCode.Bytes()})
 
 	populateDangling(helper.diskdb)

core/state/state_object.go

@@ -28,6 +28,7 @@ import (
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/metrics"
 	"github.com/ethereum/go-ethereum/rlp"
+	"github.com/ethereum/go-ethereum/trie"
 )
 
 var emptyCodeHash = crypto.Keccak256(nil)
@@ -375,23 +376,23 @@ func (s *stateObject) updateRoot(db Database) {
 
 // CommitTrie the storage trie of the object to db.
 // This updates the trie root.
-func (s *stateObject) CommitTrie(db Database) (int, error) {
+func (s *stateObject) CommitTrie(db Database) (*trie.NodeSet, error) {
 	// If nothing changed, don't bother with hashing anything
 	if s.updateTrie(db) == nil {
-		return 0, nil
+		return nil, nil
 	}
 	if s.dbErr != nil {
-		return 0, s.dbErr
+		return nil, s.dbErr
 	}
 	// Track the amount of time wasted on committing the storage trie
 	if metrics.EnabledExpensive {
 		defer func(start time.Time) { s.db.StorageCommits += time.Since(start) }(time.Now())
 	}
-	root, committed, err := s.trie.Commit(nil)
+	root, nodes, err := s.trie.Commit(false)
 	if err == nil {
 		s.data.Root = root
 	}
-	return committed, err
+	return nodes, err
 }
 
 // AddBalance adds amount to s's balance.

core/state/statedb.go

@@ -774,7 +774,7 @@ func (s *StateDB) GetRefund() uint64 {
 	return s.refund
 }
 
-// Finalise finalises the state by removing the s destructed objects and clears
+// Finalise finalises the state by removing the destructed objects and clears
 // the journal as well as the refunds. Finalise, however, will not push any updates
 // into the tries just yet. Only IntermediateRoot or Commit will do that.
 func (s *StateDB) Finalise(deleteEmptyObjects bool) {
@@ -844,7 +844,7 @@ func (s *StateDB) IntermediateRoot(deleteEmptyObjects bool) common.Hash {
 	// Although naively it makes sense to retrieve the account trie and then do
 	// the contract storage and account updates sequentially, that short circuits
 	// the account prefetcher. Instead, let's process all the storage updates
-	// first, giving the account prefeches just a few more milliseconds of time
+	// first, giving the account prefetches just a few more milliseconds of time
 	// to pull useful data from disk.
 	for addr := range s.stateObjectsPending {
 		if obj := s.stateObjects[addr]; !obj.deleted {
@@ -907,7 +907,11 @@ func (s *StateDB) Commit(deleteEmptyObjects bool) (common.Hash, error) {
 	s.IntermediateRoot(deleteEmptyObjects)
 
 	// Commit objects to the trie, measuring the elapsed time
-	var storageCommitted int
+	var (
+		accountTrieNodes int
+		storageTrieNodes int
+		nodes            = trie.NewMergedNodeSet()
+	)
 	codeWriter := s.db.TrieDB().DiskDB().NewBatch()
 	for addr := range s.stateObjectsDirty {
 		if obj := s.stateObjects[addr]; !obj.deleted {
@@ -917,11 +921,17 @@ func (s *StateDB) Commit(deleteEmptyObjects bool) (common.Hash, error) {
 				obj.dirtyCode = false
 			}
 			// Write any storage changes in the state object to its storage trie
-			committed, err := obj.CommitTrie(s.db)
+			set, err := obj.CommitTrie(s.db)
 			if err != nil {
 				return common.Hash{}, err
 			}
-			storageCommitted += committed
+			// Merge the dirty nodes of storage trie into global set
+			if set != nil {
+				if err := nodes.Merge(set); err != nil {
+					return common.Hash{}, err
+				}
+				storageTrieNodes += set.Len()
+			}
 		}
 	}
 	if len(s.stateObjectsDirty) > 0 {
@@ -937,30 +947,26 @@ func (s *StateDB) Commit(deleteEmptyObjects bool) (common.Hash, error) {
 	if metrics.EnabledExpensive {
 		start = time.Now()
 	}
-	// The onleaf func is called _serially_, so we can reuse the same account
-	// for unmarshalling every time.
-	var account types.StateAccount
-	root, accountCommitted, err := s.trie.Commit(func(_ [][]byte, _ []byte, leaf []byte, parent common.Hash, _ []byte) error {
-		if err := rlp.DecodeBytes(leaf, &account); err != nil {
-			return nil
-		}
-		if account.Root != emptyRoot {
-			s.db.TrieDB().Reference(account.Root, parent)
-		}
-		return nil
-	})
+	root, set, err := s.trie.Commit(true)
 	if err != nil {
 		return common.Hash{}, err
 	}
+	// Merge the dirty nodes of account trie into global set
+	if set != nil {
+		if err := nodes.Merge(set); err != nil {
+			return common.Hash{}, err
+		}
+		accountTrieNodes = set.Len()
+	}
 	if metrics.EnabledExpensive {
 		s.AccountCommits += time.Since(start)
 
 		accountUpdatedMeter.Mark(int64(s.AccountUpdated))
 		storageUpdatedMeter.Mark(int64(s.StorageUpdated))
 		accountDeletedMeter.Mark(int64(s.AccountDeleted))
 		storageDeletedMeter.Mark(int64(s.StorageDeleted))
-		accountCommittedMeter.Mark(int64(accountCommitted))
-		storageCommittedMeter.Mark(int64(storageCommitted))
+		accountTrieCommittedMeter.Mark(int64(accountTrieNodes))
+		storageTriesCommittedMeter.Mark(int64(storageTrieNodes))
 		s.AccountUpdated, s.AccountDeleted = 0, 0
 		s.StorageUpdated, s.StorageDeleted = 0, 0
 	}
@@ -984,6 +990,9 @@ func (s *StateDB) Commit(deleteEmptyObjects bool) (common.Hash, error) {
 		}
 		s.snap, s.snapDestructs, s.snapAccounts, s.snapStorage = nil, nil, nil, nil
 	}
+	if err := s.db.TrieDB().Update(nodes); err != nil {
+		return common.Hash{}, err
+	}
 	s.originalRoot = root
 	return root, err
 }