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cmd, core, eth, trie: get rid of trie cache generations (#19262)

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* cmd, core, eth, trie: get rid of trie cache generations

* core, trie: get rid of remainder of cache gen boilerplate
This commit is contained in:
Péter Szilágyi 2019-03-14 15:25:12 +02:00 committed by GitHub
parent e270a753be
commit 91eec1251c
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
21 changed files with 100 additions and 332 deletions
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4
cmd/geth/chaincmd.go
View File

@ -35,7 +35,6 @@ import (
"github.com/ethereum/go-ethereum/eth/downloader"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/trie"
"gopkg.in/urfave/cli.v1"
)
@ -261,9 +260,6 @@ func importChain(ctx *cli.Context) error {
}
fmt.Println(ioStats)
fmt.Printf("Trie cache misses: %d\n", trie.CacheMisses())
fmt.Printf("Trie cache unloads: %d\n\n", trie.CacheUnloads())
// Print the memory statistics used by the importing
mem := new(runtime.MemStats)
runtime.ReadMemStats(mem)

1
cmd/geth/main.go
View File

@ -102,7 +102,6 @@ var (
utils.CacheDatabaseFlag,
utils.CacheTrieFlag,
utils.CacheGCFlag,
utils.TrieCacheGenFlag,
utils.ListenPortFlag,
utils.MaxPeersFlag,
utils.MaxPendingPeersFlag,

1
cmd/geth/usage.go
View File

@ -139,7 +139,6 @@ var AppHelpFlagGroups = []flagGroup{
utils.CacheDatabaseFlag,
utils.CacheTrieFlag,
utils.CacheGCFlag,
utils.TrieCacheGenFlag,
},
},
{

10
cmd/utils/flags.go
View File

@ -37,7 +37,6 @@ import (
"github.com/ethereum/go-ethereum/consensus/clique"
"github.com/ethereum/go-ethereum/consensus/ethash"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/dashboard"
@ -350,11 +349,6 @@ var (
Usage: "Percentage of cache memory allowance to use for trie pruning (default = 25% full mode, 0% archive mode)",
Value: 25,
}
TrieCacheGenFlag = cli.IntFlag{
Name: "trie-cache-gens",
Usage: "Number of trie node generations to keep in memory",
Value: int(state.MaxTrieCacheGen),
}
// Miner settings
MiningEnabledFlag = cli.BoolFlag{
Name: "mine",
@ -1432,10 +1426,6 @@ func SetEthConfig(ctx *cli.Context, stack *node.Node, cfg *eth.Config) {
cfg.MinerGasPrice = big.NewInt(1)
}
}
// TODO(fjl): move trie cache generations into config
if gen := ctx.GlobalInt(TrieCacheGenFlag.Name); gen > 0 {
state.MaxTrieCacheGen = uint16(gen)
}
}
// SetDashboardConfig applies dashboard related command line flags to the config.

2
core/blockchain.go
View File

@ -342,7 +342,7 @@ func (bc *BlockChain) FastSyncCommitHead(hash common.Hash) error {
if block == nil {
return fmt.Errorf("non existent block [%x…]", hash[:4])
}
if _, err := trie.NewSecure(block.Root(), bc.stateCache.TrieDB(), 0); err != nil {
if _, err := trie.NewSecure(block.Root(), bc.stateCache.TrieDB()); err != nil {
return err
}
// If all checks out, manually set the head block

109
core/state/database.go
View File

@ -18,7 +18,6 @@ package state
import (
"fmt"
"sync"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/ethdb"
@ -26,14 +25,7 @@ import (
lru "github.com/hashicorp/golang-lru"
)
// Trie cache generation limit after which to evict trie nodes from memory.
var MaxTrieCacheGen = uint16(120)
const (
// Number of past tries to keep. This value is chosen such that
// reasonable chain reorg depths will hit an existing trie.
maxPastTries = 12
// Number of codehash->size associations to keep.
codeSizeCacheSize = 100000
)
@ -59,28 +51,61 @@ type Database interface {
TrieDB() *trie.Database
}
// Trie is a Ethereum Merkle Trie.
// Trie is a Ethereum Merkle Patricia trie.
type Trie interface {
// GetKey returns the sha3 preimage of a hashed key that was previously used
// to store a value.
//
// TODO(fjl): remove this when SecureTrie is removed
GetKey([]byte) []byte
// TryGet returns the value for key stored in the trie. The value bytes must
// not be modified by the caller. If a node was not found in the database, a
// trie.MissingNodeError is returned.
TryGet(key []byte) ([]byte, error)
// TryUpdate associates key with value in the trie. If value has length zero, any
// existing value is deleted from the trie. The value bytes must not be modified
// by the caller while they are stored in the trie. If a node was not found in the
// database, a trie.MissingNodeError is returned.
TryUpdate(key, value []byte) error
// TryDelete removes any existing value for key from the trie. If a node was not
// found in the database, a trie.MissingNodeError is returned.
TryDelete(key []byte) error
Commit(onleaf trie.LeafCallback) (common.Hash, error)
// Hash returns the root hash of the trie. It does not write to the database and
// 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, error)
// NodeIterator returns an iterator that returns nodes of the trie. Iteration
// starts at the key after the given start key.
NodeIterator(startKey []byte) trie.NodeIterator
GetKey([]byte) []byte // TODO(fjl): remove this when SecureTrie is removed
// Prove constructs a Merkle proof for key. The result contains all encoded nodes
// on the path to the value at key. The value itself is also included in the last
// node and can be retrieved by verifying the proof.
//
// If the trie does not contain a value for key, the returned proof contains all
// nodes of the longest existing prefix of the key (at least the root), ending
// with the node that proves the absence of the key.
Prove(key []byte, fromLevel uint, proofDb ethdb.Writer) error
}
// NewDatabase creates a backing store for state. The returned database is safe for
// concurrent use and retains a few recent expanded trie nodes in memory. To keep
// more historical state in memory, use the NewDatabaseWithCache constructor.
// concurrent use, but does not retain any recent trie nodes in memory. To keep some
// historical state in memory, use the NewDatabaseWithCache constructor.
func NewDatabase(db ethdb.Database) Database {
return NewDatabaseWithCache(db, 0)
}
// NewDatabase creates a backing store for state. The returned database is safe for
// concurrent use and retains both a few recent expanded trie nodes in memory, as
// well as a lot of collapsed RLP trie nodes in a large memory cache.
// NewDatabaseWithCache creates a backing store for state. The returned database
// is safe for concurrent use and retains a lot of collapsed RLP trie nodes in a
// large memory cache.
func NewDatabaseWithCache(db ethdb.Database, cache int) Database {
csc, _ := lru.New(codeSizeCacheSize)
return &cachingDB{
@ -91,50 +116,22 @@ func NewDatabaseWithCache(db ethdb.Database, cache int) Database {
type cachingDB struct {
db *trie.Database
mu sync.Mutex
pastTries []*trie.SecureTrie
codeSizeCache *lru.Cache
}
// OpenTrie opens the main account trie.
// OpenTrie opens the main account trie at a specific root hash.
func (db *cachingDB) OpenTrie(root common.Hash) (Trie, error) {
db.mu.Lock()
defer db.mu.Unlock()
for i := len(db.pastTries) - 1; i >= 0; i-- {
if db.pastTries[i].Hash() == root {
return cachedTrie{db.pastTries[i].Copy(), db}, nil
}
}
tr, err := trie.NewSecure(root, db.db, MaxTrieCacheGen)
if err != nil {
return nil, err
}
return cachedTrie{tr, db}, nil
}
func (db *cachingDB) pushTrie(t *trie.SecureTrie) {
db.mu.Lock()
defer db.mu.Unlock()
if len(db.pastTries) >= maxPastTries {
copy(db.pastTries, db.pastTries[1:])
db.pastTries[len(db.pastTries)-1] = t
} else {
db.pastTries = append(db.pastTries, t)
}
return trie.NewSecure(root, db.db)
}
// OpenStorageTrie opens the storage trie of an account.
func (db *cachingDB) OpenStorageTrie(addrHash, root common.Hash) (Trie, error) {
return trie.NewSecure(root, db.db, 0)
return trie.NewSecure(root, db.db)
}
// CopyTrie returns an independent copy of the given trie.
func (db *cachingDB) CopyTrie(t Trie) Trie {
switch t := t.(type) {
case cachedTrie:
return cachedTrie{t.SecureTrie.Copy(), db}
case *trie.SecureTrie:
return t.Copy()
default:
@ -164,21 +161,3 @@ func (db *cachingDB) ContractCodeSize(addrHash, codeHash common.Hash) (int, erro
func (db *cachingDB) TrieDB() *trie.Database {
return db.db
}
// cachedTrie inserts its trie into a cachingDB on commit.
type cachedTrie struct {
*trie.SecureTrie
db *cachingDB
}
func (m cachedTrie) Commit(onleaf trie.LeafCallback) (common.Hash, error) {
root, err := m.SecureTrie.Commit(onleaf)
if err == nil {
m.db.pushTrie(m.SecureTrie)
}
return root, err
}
func (m cachedTrie) Prove(key []byte, fromLevel uint, proofDb ethdb.Writer) error {
return m.SecureTrie.Prove(key, fromLevel, proofDb)
}

1
core/state/statedb.go
View File

@ -662,6 +662,5 @@ func (s *StateDB) Commit(deleteEmptyObjects bool) (root common.Hash, err error)
}
return nil
})
log.Debug("Trie cache stats after commit", "misses", trie.CacheMisses(), "unloads", trie.CacheUnloads())
return root, err
}

4
eth/api.go
View File

@ -446,11 +446,11 @@ func (api *PrivateDebugAPI) getModifiedAccounts(startBlock, endBlock *types.Bloc
}
triedb := api.eth.BlockChain().StateCache().TrieDB()
oldTrie, err := trie.NewSecure(startBlock.Root(), triedb, 0)
oldTrie, err := trie.NewSecure(startBlock.Root(), triedb)
if err != nil {
return nil, err
}
newTrie, err := trie.NewSecure(endBlock.Root(), triedb, 0)
newTrie, err := trie.NewSecure(endBlock.Root(), triedb)
if err != nil {
return nil, err
}

2
eth/downloader/downloader_test.go
View File

@ -187,7 +187,7 @@ func (dl *downloadTester) CurrentFastBlock() *types.Block {
func (dl *downloadTester) FastSyncCommitHead(hash common.Hash) error {
// For now only check that the state trie is correct
if block := dl.GetBlockByHash(hash); block != nil {
_, err := trie.NewSecure(block.Root(), trie.NewDatabase(dl.stateDb), 0)
_, err := trie.NewSecure(block.Root(), trie.NewDatabase(dl.stateDb))
return err
}
return fmt.Errorf("non existent block: %x", hash[:4])

22
trie/database.go
View File

@ -154,11 +154,11 @@ func (n *cachedNode) rlp() []byte {
// obj returns the decoded and expanded trie node, either directly from the cache,
// or by regenerating it from the rlp encoded blob.
func (n *cachedNode) obj(hash common.Hash, cachegen uint16) node {
func (n *cachedNode) obj(hash common.Hash) node {
if node, ok := n.node.(rawNode); ok {
return mustDecodeNode(hash[:], node, cachegen)
return mustDecodeNode(hash[:], node)
}
return expandNode(hash[:], n.node, cachegen)
return expandNode(hash[:], n.node)
}
// childs returns all the tracked children of this node, both the implicit ones
@ -223,16 +223,15 @@ func simplifyNode(n node) node {
// expandNode traverses the node hierarchy of a collapsed storage node and converts
// all fields and keys into expanded memory form.
func expandNode(hash hashNode, n node, cachegen uint16) node {
func expandNode(hash hashNode, n node) node {
switch n := n.(type) {
case *rawShortNode:
// Short nodes need key and child expansion
return &shortNode{
Key: compactToHex(n.Key),
Val: expandNode(nil, n.Val, cachegen),
Val: expandNode(nil, n.Val),
flags: nodeFlag{
hash: hash,
gen: cachegen,
},
}
@ -241,12 +240,11 @@ func expandNode(hash hashNode, n node, cachegen uint16) node {
node := &fullNode{
flags: nodeFlag{
hash: hash,
gen: cachegen,
},
}
for i := 0; i < len(node.Children); i++ {
if n[i] != nil {
node.Children[i] = expandNode(nil, n[i], cachegen)
node.Children[i] = expandNode(nil, n[i])
}
}
return node
@ -349,13 +347,13 @@ func (db *Database) insertPreimage(hash common.Hash, preimage []byte) {
// node retrieves a cached trie node from memory, or returns nil if none can be
// found in the memory cache.
func (db *Database) node(hash common.Hash, cachegen uint16) node {
func (db *Database) node(hash common.Hash) node {
// Retrieve the node from the clean cache if available
if db.cleans != nil {
if enc, err := db.cleans.Get(string(hash[:])); err == nil && enc != nil {
memcacheCleanHitMeter.Mark(1)
memcacheCleanReadMeter.Mark(int64(len(enc)))
return mustDecodeNode(hash[:], enc, cachegen)
return mustDecodeNode(hash[:], enc)
}
}
// Retrieve the node from the dirty cache if available
@ -364,7 +362,7 @@ func (db *Database) node(hash common.Hash, cachegen uint16) node {
db.lock.RUnlock()
if dirty != nil {
return dirty.obj(hash, cachegen)
return dirty.obj(hash)
}
// Content unavailable in memory, attempt to retrieve from disk
enc, err := db.diskdb.Get(hash[:])
@ -376,7 +374,7 @@ func (db *Database) node(hash common.Hash, cachegen uint16) node {
memcacheCleanMissMeter.Mark(1)
memcacheCleanWriteMeter.Mark(int64(len(enc)))
}
return mustDecodeNode(hash[:], enc, cachegen)
return mustDecodeNode(hash[:], enc)
}
// Node retrieves an encoded cached trie node from memory. If it cannot be found

17
trie/hasher.go
View File

@ -28,8 +28,6 @@ import (
type hasher struct {
tmp sliceBuffer
sha keccakState
cachegen uint16
cachelimit uint16
onleaf LeafCallback
}
@ -62,9 +60,9 @@ var hasherPool = sync.Pool{
},
}
func newHasher(cachegen, cachelimit uint16, onleaf LeafCallback) *hasher {
func newHasher(onleaf LeafCallback) *hasher {
h := hasherPool.Get().(*hasher)
h.cachegen, h.cachelimit, h.onleaf = cachegen, cachelimit, onleaf
h.onleaf = onleaf
return h
}
@ -80,16 +78,15 @@ func (h *hasher) hash(n node, db *Database, force bool) (node, node, error) {
if db == nil {
return hash, n, nil
}
if n.canUnload(h.cachegen, h.cachelimit) {
// Unload the node from cache. All of its subnodes will have a lower or equal
// cache generation number.
cacheUnloadCounter.Inc(1)
return hash, hash, nil
}
if !dirty {
switch n.(type) {
case *fullNode, *shortNode:
return hash, hash, nil
default:
return hash, n, nil
}
}
}
// Trie not processed yet or needs storage, walk the children
collapsed, cached, err := h.hashChildren(n, db)
if err != nil {

2
trie/iterator.go
View File

@ -180,7 +180,7 @@ func (it *nodeIterator) LeafBlob() []byte {
func (it *nodeIterator) LeafProof() [][]byte {
if len(it.stack) > 0 {
if _, ok := it.stack[len(it.stack)-1].node.(valueNode); ok {
hasher := newHasher(0, 0, nil)
hasher := newHasher(nil)
defer returnHasherToPool(hasher)
proofs := make([][]byte, 0, len(it.stack))

38
trie/node.go
View File

@ -30,7 +30,6 @@ var indices = []string{"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b
type node interface {
fstring(string) string
cache() (hashNode, bool)
canUnload(cachegen, cachelimit uint16) bool
}
type (
@ -71,20 +70,9 @@ func (n *shortNode) copy() *shortNode { copy := *n; return &copy }
// nodeFlag contains caching-related metadata about a node.
type nodeFlag struct {
hash hashNode // cached hash of the node (may be nil)
gen uint16 // cache generation counter
dirty bool // whether the node has changes that must be written to the database
}
// canUnload tells whether a node can be unloaded.
func (n *nodeFlag) canUnload(cachegen, cachelimit uint16) bool {
return !n.dirty && cachegen-n.gen >= cachelimit
}
func (n *fullNode) canUnload(gen, limit uint16) bool { return n.flags.canUnload(gen, limit) }
func (n *shortNode) canUnload(gen, limit uint16) bool { return n.flags.canUnload(gen, limit) }
func (n hashNode) canUnload(uint16, uint16) bool { return false }
func (n valueNode) canUnload(uint16, uint16) bool { return false }
func (n *fullNode) cache() (hashNode, bool) { return n.flags.hash, n.flags.dirty }
func (n *shortNode) cache() (hashNode, bool) { return n.flags.hash, n.flags.dirty }
func (n hashNode) cache() (hashNode, bool) { return nil, true }
@ -117,8 +105,8 @@ func (n valueNode) fstring(ind string) string {
return fmt.Sprintf("%x ", []byte(n))
}
func mustDecodeNode(hash, buf []byte, cachegen uint16) node {
n, err := decodeNode(hash, buf, cachegen)
func mustDecodeNode(hash, buf []byte) node {
n, err := decodeNode(hash, buf)
if err != nil {
panic(fmt.Sprintf("node %x: %v", hash, err))
}
@ -126,7 +114,7 @@ func mustDecodeNode(hash, buf []byte, cachegen uint16) node {
}
// decodeNode parses the RLP encoding of a trie node.
func decodeNode(hash, buf []byte, cachegen uint16) (node, error) {
func decodeNode(hash, buf []byte) (node, error) {
if len(buf) == 0 {
return nil, io.ErrUnexpectedEOF
}
@ -136,22 +124,22 @@ func decodeNode(hash, buf []byte, cachegen uint16) (node, error) {
}
switch c, _ := rlp.CountValues(elems); c {
case 2:
n, err := decodeShort(hash, elems, cachegen)
n, err := decodeShort(hash, elems)
return n, wrapError(err, "short")
case 17:
n, err := decodeFull(hash, elems, cachegen)
n, err := decodeFull(hash, elems)
return n, wrapError(err, "full")
default:
return nil, fmt.Errorf("invalid number of list elements: %v", c)
}
}
func decodeShort(hash, elems []byte, cachegen uint16) (node, error) {
func decodeShort(hash, elems []byte) (node, error) {
kbuf, rest, err := rlp.SplitString(elems)
if err != nil {
return nil, err
}
flag := nodeFlag{hash: hash, gen: cachegen}
flag := nodeFlag{hash: hash}
key := compactToHex(kbuf)
if hasTerm(key) {
// value node
@ -161,17 +149,17 @@ func decodeShort(hash, elems []byte, cachegen uint16) (node, error) {
}
return &shortNode{key, append(valueNode{}, val...), flag}, nil
}
r, _, err := decodeRef(rest, cachegen)
r, _, err := decodeRef(rest)
if err != nil {
return nil, wrapError(err, "val")
}
return &shortNode{key, r, flag}, nil
}
func decodeFull(hash, elems []byte, cachegen uint16) (*fullNode, error) {
n := &fullNode{flags: nodeFlag{hash: hash, gen: cachegen}}
func decodeFull(hash, elems []byte) (*fullNode, error) {
n := &fullNode{flags: nodeFlag{hash: hash}}
for i := 0; i < 16; i++ {
cld, rest, err := decodeRef(elems, cachegen)
cld, rest, err := decodeRef(elems)
if err != nil {
return n, wrapError(err, fmt.Sprintf("[%d]", i))
}
@ -189,7 +177,7 @@ func decodeFull(hash, elems []byte, cachegen uint16) (*fullNode, error) {
const hashLen = len(common.Hash{})
func decodeRef(buf []byte, cachegen uint16) (node, []byte, error) {
func decodeRef(buf []byte) (node, []byte, error) {
kind, val, rest, err := rlp.Split(buf)
if err != nil {
return nil, buf, err
@ -202,7 +190,7 @@ func decodeRef(buf []byte, cachegen uint16) (node, []byte, error) {
err := fmt.Errorf("oversized embedded node (size is %d bytes, want size < %d)", size, hashLen)
return nil, buf, err
}
n, err := decodeNode(nil, buf, cachegen)
n, err := decodeNode(nil, buf)
return n, rest, err
case kind == rlp.String && len(val) == 0:
// empty node

58
trie/node_test.go
View File

@ -1,58 +0,0 @@
// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package trie
import "testing"
func TestCanUnload(t *testing.T) {
tests := []struct {
flag nodeFlag
cachegen, cachelimit uint16
want bool
}{
{
flag: nodeFlag{dirty: true, gen: 0},
want: false,
},
{
flag: nodeFlag{dirty: false, gen: 0},
cachegen: 0, cachelimit: 0,
want: true,
},
{
flag: nodeFlag{dirty: false, gen: 65534},
cachegen: 65535, cachelimit: 1,
want: true,
},
{
flag: nodeFlag{dirty: false, gen: 65534},
cachegen: 0, cachelimit: 1,
want: true,
},
{
flag: nodeFlag{dirty: false, gen: 1},
cachegen: 65535, cachelimit: 1,
want: true,
},
}
for _, test := range tests {
if got := test.flag.canUnload(test.cachegen, test.cachelimit); got != test.want {
t.Errorf("%+v\n got %t, want %t", test, got, test.want)
}
}
}

4
trie/proof.go
View File

@ -65,7 +65,7 @@ func (t *Trie) Prove(key []byte, fromLevel uint, proofDb ethdb.Writer) error {
panic(fmt.Sprintf("%T: invalid node: %v", tn, tn))
}
}
hasher := newHasher(0, 0, nil)
hasher := newHasher(nil)
defer returnHasherToPool(hasher)
for i, n := range nodes {
@ -112,7 +112,7 @@ func VerifyProof(rootHash common.Hash, key []byte, proofDb ethdb.Reader) (value
if buf == nil {
return nil, i, fmt.Errorf("proof node %d (hash %064x) missing", i, wantHash)
}
n, err := decodeNode(wantHash[:], buf, 0)
n, err := decodeNode(wantHash[:], buf)
if err != nil {
return nil, i, fmt.Errorf("bad proof node %d: %v", i, err)
}

11
trie/secure_trie.go
View File

@ -51,7 +51,7 @@ type SecureTrie struct {
// Loaded nodes are kept around until their 'cache generation' expires.
// A new cache generation is created by each call to Commit.
// cachelimit sets the number of past cache generations to keep.
func NewSecure(root common.Hash, db *Database, cachelimit uint16) (*SecureTrie, error) {
func NewSecure(root common.Hash, db *Database) (*SecureTrie, error) {
if db == nil {
panic("trie.NewSecure called without a database")
}
@ -59,7 +59,6 @@ func NewSecure(root common.Hash, db *Database, cachelimit uint16) (*SecureTrie,
if err != nil {
return nil, err
}
trie.SetCacheLimit(cachelimit)
return &SecureTrie{trie: *trie}, nil
}
@ -161,12 +160,6 @@ func (t *SecureTrie) Hash() common.Hash {
return t.trie.Hash()
}
// Root returns the root hash of SecureTrie.
// Deprecated: use Hash instead.
func (t *SecureTrie) Root() []byte {
return t.trie.Root()
}
// Copy returns a copy of SecureTrie.
func (t *SecureTrie) Copy() *SecureTrie {
cpy := *t
@ -183,7 +176,7 @@ func (t *SecureTrie) NodeIterator(start []byte) NodeIterator {
// The caller must not hold onto the return value because it will become
// invalid on the next call to hashKey or secKey.
func (t *SecureTrie) hashKey(key []byte) []byte {
h := newHasher(0, 0, nil)
h := newHasher(nil)
h.sha.Reset()
h.sha.Write(key)
buf := h.sha.Sum(t.hashKeyBuf[:0])

5
trie/secure_trie_test.go
View File

@ -28,7 +28,7 @@ import (
)
func newEmptySecure() *SecureTrie {
trie, _ := NewSecure(common.Hash{}, NewDatabase(memorydb.New()), 0)
trie, _ := NewSecure(common.Hash{}, NewDatabase(memorydb.New()))
return trie
}
@ -36,8 +36,7 @@ func newEmptySecure() *SecureTrie {
func makeTestSecureTrie() (*Database, *SecureTrie, map[string][]byte) {
// Create an empty trie
triedb := NewDatabase(memorydb.New())
trie, _ := NewSecure(common.Hash{}, triedb, 0)
trie, _ := NewSecure(common.Hash{}, triedb)
// Fill it with some arbitrary data
content := make(map[string][]byte)

4
trie/sync.go
View File

@ -101,7 +101,7 @@ func (s *Sync) AddSubTrie(root common.Hash, depth int, parent common.Hash, callb
}
key := root.Bytes()
blob, _ := s.database.Get(key)
if local, err := decodeNode(key, blob, 0); local != nil && err == nil {
if local, err := decodeNode(key, blob); local != nil && err == nil {
return
}
// Assemble the new sub-trie sync request
@ -187,7 +187,7 @@ func (s *Sync) Process(results []SyncResult) (bool, int, error) {
continue
}
// Decode the node data content and update the request
node, err := decodeNode(item.Hash[:], item.Data, 0)
node, err := decodeNode(item.Hash[:], item.Data)
if err != nil {
return committed, i, err
}

10
trie/sync_test.go
View File

@ -133,7 +133,7 @@ func testIterativeSync(t *testing.T, batch int) {
queue = append(queue[:0], sched.Missing(batch)...)
}
// Cross check that the two tries are in sync
checkTrieContents(t, triedb, srcTrie.Root(), srcData)
checkTrieContents(t, triedb, srcTrie.Hash().Bytes(), srcData)
}
// Tests that the trie scheduler can correctly reconstruct the state even if only
@ -167,7 +167,7 @@ func TestIterativeDelayedSync(t *testing.T) {
queue = append(queue[len(results):], sched.Missing(10000)...)
}
// Cross check that the two tries are in sync
checkTrieContents(t, triedb, srcTrie.Root(), srcData)
checkTrieContents(t, triedb, srcTrie.Hash().Bytes(), srcData)
}
// Tests that given a root hash, a trie can sync iteratively on a single thread,
@ -212,7 +212,7 @@ func testIterativeRandomSync(t *testing.T, batch int) {
}
}
// Cross check that the two tries are in sync
checkTrieContents(t, triedb, srcTrie.Root(), srcData)
checkTrieContents(t, triedb, srcTrie.Hash().Bytes(), srcData)
}
// Tests that the trie scheduler can correctly reconstruct the state even if only
@ -259,7 +259,7 @@ func TestIterativeRandomDelayedSync(t *testing.T) {
}
}
// Cross check that the two tries are in sync
checkTrieContents(t, triedb, srcTrie.Root(), srcData)
checkTrieContents(t, triedb, srcTrie.Hash().Bytes(), srcData)
}
// Tests that a trie sync will not request nodes multiple times, even if they
@ -299,7 +299,7 @@ func TestDuplicateAvoidanceSync(t *testing.T) {
queue = append(queue[:0], sched.Missing(0)...)
}
// Cross check that the two tries are in sync
checkTrieContents(t, triedb, srcTrie.Root(), srcData)
checkTrieContents(t, triedb, srcTrie.Hash().Bytes(), srcData)
}
// Tests that at any point in time during a sync, only complete sub-tries are in

47
trie/trie.go
View File

@ -24,7 +24,6 @@ import (
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/metrics"
)
var (
@ -35,25 +34,6 @@ var (
emptyState = crypto.Keccak256Hash(nil)
)
var (
cacheMissCounter = metrics.NewRegisteredCounter("trie/cachemiss", nil)
cacheUnloadCounter = metrics.NewRegisteredCounter("trie/cacheunload", nil)
)
// CacheMisses retrieves a global counter measuring the number of cache misses
// the trie had since process startup. This isn't useful for anything apart from
// trie debugging purposes.
func CacheMisses() int64 {
return cacheMissCounter.Count()
}
// CacheUnloads retrieves a global counter measuring the number of cache unloads
// the trie did since process startup. This isn't useful for anything apart from
// trie debugging purposes.
func CacheUnloads() int64 {
return cacheUnloadCounter.Count()
}
// LeafCallback is a callback type invoked when a trie operation reaches a leaf
// node. It's used by state sync and commit to allow handling external references
// between account and storage tries.
@ -67,23 +47,11 @@ type LeafCallback func(leaf []byte, parent common.Hash) error
type Trie struct {
db *Database
root node
// Cache generation values.
// cachegen increases by one with each commit operation.
// new nodes are tagged with the current generation and unloaded
// when their generation is older than than cachegen-cachelimit.
cachegen, cachelimit uint16
}
// SetCacheLimit sets the number of 'cache generations' to keep.
// A cache generation is created by a call to Commit.
func (t *Trie) SetCacheLimit(l uint16) {
t.cachelimit = l
}
// newFlag returns the cache flag value for a newly created node.
func (t *Trie) newFlag() nodeFlag {
return nodeFlag{dirty: true, gen: t.cachegen}
return nodeFlag{dirty: true}
}
// New creates a trie with an existing root node from db.
@ -152,14 +120,12 @@ func (t *Trie) tryGet(origNode node, key []byte, pos int) (value []byte, newnode
if err == nil && didResolve {
n = n.copy()
n.Val = newnode
n.flags.gen = t.cachegen
}
return value, n, didResolve, err
case *fullNode:
value, newnode, didResolve, err = t.tryGet(n.Children[key[pos]], key, pos+1)
if err == nil && didResolve {
n = n.copy()
n.flags.gen = t.cachegen
n.Children[key[pos]] = newnode
}
return value, n, didResolve, err
@ -428,19 +394,13 @@ func (t *Trie) resolve(n node, prefix []byte) (node, error) {
}
func (t *Trie) resolveHash(n hashNode, prefix []byte) (node, error) {
cacheMissCounter.Inc(1)
hash := common.BytesToHash(n)
if node := t.db.node(hash, t.cachegen); node != nil {
if node := t.db.node(hash); node != nil {
return node, nil
}
return nil, &MissingNodeError{NodeHash: hash, Path: prefix}
}
// Root returns the root hash of the trie.
// Deprecated: use Hash instead.
func (t *Trie) Root() []byte { return t.Hash().Bytes() }
// Hash returns the root hash of the trie. It does not write to the
// database and can be used even if the trie doesn't have one.
func (t *Trie) Hash() common.Hash {
@ -460,7 +420,6 @@ func (t *Trie) Commit(onleaf LeafCallback) (root common.Hash, err error) {
return common.Hash{}, err
}
t.root = cached
t.cachegen++
return common.BytesToHash(hash.(hashNode)), nil
}
@ -468,7 +427,7 @@ func (t *Trie) hashRoot(db *Database, onleaf LeafCallback) (node, node, error) {
if t.root == nil {
return hashNode(emptyRoot.Bytes()), nil, nil
}
h := newHasher(t.cachegen, t.cachelimit, onleaf)
h := newHasher(onleaf)
defer returnHasherToPool(h)
return h.hash(t.root, db, true)
}

72
trie/trie_test.go
View File

@ -19,7 +19,6 @@ package trie
import (
"bytes"
"encoding/binary"
"errors"
"fmt"
"io/ioutil"
"math/big"
@ -328,38 +327,6 @@ func (db *countingDB) Get(key []byte) ([]byte, error) {
return db.KeyValueStore.Get(key)
}
// TestCacheUnload checks that decoded nodes are unloaded after a
// certain number of commit operations.
func TestCacheUnload(t *testing.T) {
// Create test trie with two branches.
trie := newEmpty()
key1 := "---------------------------------"
key2 := "---some other branch"
updateString(trie, key1, "this is the branch of key1.")
updateString(trie, key2, "this is the branch of key2.")
root, _ := trie.Commit(nil)
trie.db.Commit(root, true)
// Commit the trie repeatedly and access key1.
// The branch containing it is loaded from DB exactly two times:
// in the 0th and 6th iteration.
diskdb := &countingDB{KeyValueStore: trie.db.diskdb, gets: make(map[string]int)}
triedb := NewDatabase(diskdb)
trie, _ = New(root, triedb)
trie.SetCacheLimit(5)
for i := 0; i < 12; i++ {
getString(trie, key1)
trie.Commit(nil)
}
// Check that it got loaded two times.
for dbkey, count := range diskdb.gets {
if count != 2 {
t.Errorf("db key %x loaded %d times, want %d times", []byte(dbkey), count, 2)
}
}
}
// randTest performs random trie operations.
// Instances of this test are created by Generate.
type randTest []randTestStep
@ -379,7 +346,6 @@ const (
opHash
opReset
opItercheckhash
opCheckCacheInvariant
opMax // boundary value, not an actual op
)
@ -458,8 +424,6 @@ func runRandTest(rt randTest) bool {
if tr.Hash() != checktr.Hash() {
rt[i].err = fmt.Errorf("hash mismatch in opItercheckhash")
}
case opCheckCacheInvariant:
rt[i].err = checkCacheInvariant(tr.root, nil, tr.cachegen, false, 0)
}
// Abort the test on error.
if rt[i].err != nil {
@ -469,40 +433,6 @@ func runRandTest(rt randTest) bool {
return true
}
func checkCacheInvariant(n, parent node, parentCachegen uint16, parentDirty bool, depth int) error {
var children []node
var flag nodeFlag
switch n := n.(type) {
case *shortNode:
flag = n.flags
children = []node{n.Val}
case *fullNode:
flag = n.flags
children = n.Children[:]
default:
return nil
}
errorf := func(format string, args ...interface{}) error {
msg := fmt.Sprintf(format, args...)
msg += fmt.Sprintf("\nat depth %d node %s", depth, spew.Sdump(n))
msg += fmt.Sprintf("parent: %s", spew.Sdump(parent))
return errors.New(msg)
}
if flag.gen > parentCachegen {
return errorf("cache invariant violation: %d > %d\n", flag.gen, parentCachegen)
}
if depth > 0 && !parentDirty && flag.dirty {
return errorf("cache invariant violation: %d > %d\n", flag.gen, parentCachegen)
}
for _, child := range children {
if err := checkCacheInvariant(child, n, flag.gen, flag.dirty, depth+1); err != nil {
return err
}
}
return nil
}
func TestRandom(t *testing.T) {
if err := quick.Check(runRandTest, nil); err != nil {
if cerr, ok := err.(*quick.CheckError); ok {
@ -626,6 +556,6 @@ func TestDecodeNode(t *testing.T) {
for i := 0; i < 5000000; i++ {
rand.Read(hash)
rand.Read(elems)
decodeNode(hash, elems, 1)
decodeNode(hash, elems)
}
}