743e404906
This PR introduces a node scheme abstraction. The interface is only implemented by `hashScheme` at the moment, but will be extended by `pathScheme` very soon. Apart from that, a few changes are also included which is worth mentioning: - port the changes in the stacktrie, tracking the path prefix of nodes during commit - use ethdb.Database for constructing trie.Database. This is not necessary right now, but it is required for path-based used to open reverse diff freezer
619 lines
16 KiB
Go
619 lines
16 KiB
Go
// Copyright 2014 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package trie
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import (
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"bytes"
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"encoding/binary"
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"fmt"
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"math/rand"
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"testing"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/rawdb"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/ethdb/memorydb"
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)
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func TestEmptyIterator(t *testing.T) {
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trie := NewEmpty(NewDatabase(rawdb.NewMemoryDatabase()))
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iter := trie.NodeIterator(nil)
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seen := make(map[string]struct{})
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for iter.Next(true) {
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seen[string(iter.Path())] = struct{}{}
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}
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if len(seen) != 0 {
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t.Fatal("Unexpected trie node iterated")
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}
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}
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func TestIterator(t *testing.T) {
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db := NewDatabase(rawdb.NewMemoryDatabase())
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trie := NewEmpty(db)
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vals := []struct{ k, v string }{
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{"do", "verb"},
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{"ether", "wookiedoo"},
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{"horse", "stallion"},
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{"shaman", "horse"},
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{"doge", "coin"},
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{"dog", "puppy"},
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{"somethingveryoddindeedthis is", "myothernodedata"},
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}
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all := make(map[string]string)
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for _, val := range vals {
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all[val.k] = val.v
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trie.Update([]byte(val.k), []byte(val.v))
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}
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root, nodes, err := trie.Commit(false)
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if err != nil {
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t.Fatalf("Failed to commit trie %v", err)
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}
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db.Update(NewWithNodeSet(nodes))
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trie, _ = New(TrieID(root), db)
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found := make(map[string]string)
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it := NewIterator(trie.NodeIterator(nil))
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for it.Next() {
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found[string(it.Key)] = string(it.Value)
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}
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for k, v := range all {
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if found[k] != v {
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t.Errorf("iterator value mismatch for %s: got %q want %q", k, found[k], v)
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}
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}
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}
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type kv struct {
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k, v []byte
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t bool
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}
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func TestIteratorLargeData(t *testing.T) {
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trie := NewEmpty(NewDatabase(rawdb.NewMemoryDatabase()))
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vals := make(map[string]*kv)
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for i := byte(0); i < 255; i++ {
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value := &kv{common.LeftPadBytes([]byte{i}, 32), []byte{i}, false}
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value2 := &kv{common.LeftPadBytes([]byte{10, i}, 32), []byte{i}, false}
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trie.Update(value.k, value.v)
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trie.Update(value2.k, value2.v)
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vals[string(value.k)] = value
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vals[string(value2.k)] = value2
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}
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it := NewIterator(trie.NodeIterator(nil))
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for it.Next() {
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vals[string(it.Key)].t = true
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}
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var untouched []*kv
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for _, value := range vals {
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if !value.t {
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untouched = append(untouched, value)
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}
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}
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if len(untouched) > 0 {
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t.Errorf("Missed %d nodes", len(untouched))
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for _, value := range untouched {
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t.Error(value)
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}
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}
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}
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// Tests that the node iterator indeed walks over the entire database contents.
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func TestNodeIteratorCoverage(t *testing.T) {
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// Create some arbitrary test trie to iterate
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db, trie, _ := makeTestTrie()
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// Gather all the node hashes found by the iterator
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hashes := make(map[common.Hash]struct{})
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for it := trie.NodeIterator(nil); it.Next(true); {
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if it.Hash() != (common.Hash{}) {
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hashes[it.Hash()] = struct{}{}
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}
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}
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// Cross check the hashes and the database itself
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for hash := range hashes {
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if _, err := db.Node(hash); err != nil {
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t.Errorf("failed to retrieve reported node %x: %v", hash, err)
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}
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}
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for hash, obj := range db.dirties {
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if obj != nil && hash != (common.Hash{}) {
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if _, ok := hashes[hash]; !ok {
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t.Errorf("state entry not reported %x", hash)
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}
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}
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}
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it := db.diskdb.NewIterator(nil, nil)
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for it.Next() {
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key := it.Key()
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if _, ok := hashes[common.BytesToHash(key)]; !ok {
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t.Errorf("state entry not reported %x", key)
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}
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}
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it.Release()
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}
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type kvs struct{ k, v string }
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var testdata1 = []kvs{
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{"barb", "ba"},
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{"bard", "bc"},
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{"bars", "bb"},
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{"bar", "b"},
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{"fab", "z"},
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{"food", "ab"},
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{"foos", "aa"},
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{"foo", "a"},
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}
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var testdata2 = []kvs{
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{"aardvark", "c"},
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{"bar", "b"},
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{"barb", "bd"},
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{"bars", "be"},
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{"fab", "z"},
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{"foo", "a"},
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{"foos", "aa"},
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{"food", "ab"},
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{"jars", "d"},
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}
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func TestIteratorSeek(t *testing.T) {
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trie := NewEmpty(NewDatabase(rawdb.NewMemoryDatabase()))
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for _, val := range testdata1 {
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trie.Update([]byte(val.k), []byte(val.v))
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}
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// Seek to the middle.
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it := NewIterator(trie.NodeIterator([]byte("fab")))
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if err := checkIteratorOrder(testdata1[4:], it); err != nil {
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t.Fatal(err)
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}
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// Seek to a non-existent key.
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it = NewIterator(trie.NodeIterator([]byte("barc")))
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if err := checkIteratorOrder(testdata1[1:], it); err != nil {
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t.Fatal(err)
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}
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// Seek beyond the end.
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it = NewIterator(trie.NodeIterator([]byte("z")))
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if err := checkIteratorOrder(nil, it); err != nil {
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t.Fatal(err)
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}
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}
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func checkIteratorOrder(want []kvs, it *Iterator) error {
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for it.Next() {
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if len(want) == 0 {
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return fmt.Errorf("didn't expect any more values, got key %q", it.Key)
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}
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if !bytes.Equal(it.Key, []byte(want[0].k)) {
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return fmt.Errorf("wrong key: got %q, want %q", it.Key, want[0].k)
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}
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want = want[1:]
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}
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if len(want) > 0 {
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return fmt.Errorf("iterator ended early, want key %q", want[0])
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}
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return nil
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}
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func TestDifferenceIterator(t *testing.T) {
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dba := NewDatabase(rawdb.NewMemoryDatabase())
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triea := NewEmpty(dba)
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for _, val := range testdata1 {
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triea.Update([]byte(val.k), []byte(val.v))
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}
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rootA, nodesA, _ := triea.Commit(false)
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dba.Update(NewWithNodeSet(nodesA))
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triea, _ = New(TrieID(rootA), dba)
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dbb := NewDatabase(rawdb.NewMemoryDatabase())
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trieb := NewEmpty(dbb)
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for _, val := range testdata2 {
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trieb.Update([]byte(val.k), []byte(val.v))
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}
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rootB, nodesB, _ := trieb.Commit(false)
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dbb.Update(NewWithNodeSet(nodesB))
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trieb, _ = New(TrieID(rootB), dbb)
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found := make(map[string]string)
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di, _ := NewDifferenceIterator(triea.NodeIterator(nil), trieb.NodeIterator(nil))
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it := NewIterator(di)
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for it.Next() {
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found[string(it.Key)] = string(it.Value)
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}
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all := []struct{ k, v string }{
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{"aardvark", "c"},
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{"barb", "bd"},
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{"bars", "be"},
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{"jars", "d"},
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}
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for _, item := range all {
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if found[item.k] != item.v {
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t.Errorf("iterator value mismatch for %s: got %v want %v", item.k, found[item.k], item.v)
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}
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}
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if len(found) != len(all) {
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t.Errorf("iterator count mismatch: got %d values, want %d", len(found), len(all))
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}
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}
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func TestUnionIterator(t *testing.T) {
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dba := NewDatabase(rawdb.NewMemoryDatabase())
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triea := NewEmpty(dba)
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for _, val := range testdata1 {
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triea.Update([]byte(val.k), []byte(val.v))
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}
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rootA, nodesA, _ := triea.Commit(false)
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dba.Update(NewWithNodeSet(nodesA))
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triea, _ = New(TrieID(rootA), dba)
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dbb := NewDatabase(rawdb.NewMemoryDatabase())
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trieb := NewEmpty(dbb)
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for _, val := range testdata2 {
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trieb.Update([]byte(val.k), []byte(val.v))
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}
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rootB, nodesB, _ := trieb.Commit(false)
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dbb.Update(NewWithNodeSet(nodesB))
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trieb, _ = New(TrieID(rootB), dbb)
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di, _ := NewUnionIterator([]NodeIterator{triea.NodeIterator(nil), trieb.NodeIterator(nil)})
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it := NewIterator(di)
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all := []struct{ k, v string }{
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{"aardvark", "c"},
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{"barb", "ba"},
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{"barb", "bd"},
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{"bard", "bc"},
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{"bars", "bb"},
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{"bars", "be"},
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{"bar", "b"},
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{"fab", "z"},
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{"food", "ab"},
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{"foos", "aa"},
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{"foo", "a"},
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{"jars", "d"},
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}
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for i, kv := range all {
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if !it.Next() {
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t.Errorf("Iterator ends prematurely at element %d", i)
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}
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if kv.k != string(it.Key) {
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t.Errorf("iterator value mismatch for element %d: got key %s want %s", i, it.Key, kv.k)
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}
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if kv.v != string(it.Value) {
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t.Errorf("iterator value mismatch for element %d: got value %s want %s", i, it.Value, kv.v)
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}
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}
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if it.Next() {
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t.Errorf("Iterator returned extra values.")
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}
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}
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func TestIteratorNoDups(t *testing.T) {
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tr := NewEmpty(NewDatabase(rawdb.NewMemoryDatabase()))
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for _, val := range testdata1 {
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tr.Update([]byte(val.k), []byte(val.v))
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}
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checkIteratorNoDups(t, tr.NodeIterator(nil), nil)
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}
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// This test checks that nodeIterator.Next can be retried after inserting missing trie nodes.
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func TestIteratorContinueAfterErrorDisk(t *testing.T) { testIteratorContinueAfterError(t, false) }
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func TestIteratorContinueAfterErrorMemonly(t *testing.T) { testIteratorContinueAfterError(t, true) }
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func testIteratorContinueAfterError(t *testing.T, memonly bool) {
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diskdb := rawdb.NewMemoryDatabase()
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triedb := NewDatabase(diskdb)
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tr := NewEmpty(triedb)
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for _, val := range testdata1 {
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tr.Update([]byte(val.k), []byte(val.v))
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}
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_, nodes, _ := tr.Commit(false)
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triedb.Update(NewWithNodeSet(nodes))
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if !memonly {
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triedb.Commit(tr.Hash(), true, nil)
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}
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wantNodeCount := checkIteratorNoDups(t, tr.NodeIterator(nil), nil)
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var (
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diskKeys [][]byte
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memKeys []common.Hash
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)
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if memonly {
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memKeys = triedb.Nodes()
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} else {
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it := diskdb.NewIterator(nil, nil)
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for it.Next() {
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diskKeys = append(diskKeys, it.Key())
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}
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it.Release()
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}
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for i := 0; i < 20; i++ {
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// Create trie that will load all nodes from DB.
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tr, _ := New(TrieID(tr.Hash()), triedb)
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// Remove a random node from the database. It can't be the root node
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// because that one is already loaded.
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var (
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rkey common.Hash
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rval []byte
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robj *cachedNode
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)
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for {
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if memonly {
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rkey = memKeys[rand.Intn(len(memKeys))]
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} else {
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copy(rkey[:], diskKeys[rand.Intn(len(diskKeys))])
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}
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if rkey != tr.Hash() {
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break
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}
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}
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if memonly {
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robj = triedb.dirties[rkey]
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delete(triedb.dirties, rkey)
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} else {
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rval, _ = diskdb.Get(rkey[:])
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diskdb.Delete(rkey[:])
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}
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// Iterate until the error is hit.
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seen := make(map[string]bool)
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it := tr.NodeIterator(nil)
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checkIteratorNoDups(t, it, seen)
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missing, ok := it.Error().(*MissingNodeError)
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if !ok || missing.NodeHash != rkey {
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t.Fatal("didn't hit missing node, got", it.Error())
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}
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// Add the node back and continue iteration.
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if memonly {
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triedb.dirties[rkey] = robj
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} else {
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diskdb.Put(rkey[:], rval)
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}
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checkIteratorNoDups(t, it, seen)
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if it.Error() != nil {
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t.Fatal("unexpected error", it.Error())
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}
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if len(seen) != wantNodeCount {
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t.Fatal("wrong node iteration count, got", len(seen), "want", wantNodeCount)
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}
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}
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}
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// Similar to the test above, this one checks that failure to create nodeIterator at a
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// certain key prefix behaves correctly when Next is called. The expectation is that Next
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// should retry seeking before returning true for the first time.
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func TestIteratorContinueAfterSeekErrorDisk(t *testing.T) {
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testIteratorContinueAfterSeekError(t, false)
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}
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func TestIteratorContinueAfterSeekErrorMemonly(t *testing.T) {
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testIteratorContinueAfterSeekError(t, true)
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}
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func testIteratorContinueAfterSeekError(t *testing.T, memonly bool) {
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// Commit test trie to db, then remove the node containing "bars".
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diskdb := rawdb.NewMemoryDatabase()
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triedb := NewDatabase(diskdb)
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ctr := NewEmpty(triedb)
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for _, val := range testdata1 {
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ctr.Update([]byte(val.k), []byte(val.v))
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}
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root, nodes, _ := ctr.Commit(false)
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triedb.Update(NewWithNodeSet(nodes))
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if !memonly {
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triedb.Commit(root, true, nil)
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}
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barNodeHash := common.HexToHash("05041990364eb72fcb1127652ce40d8bab765f2bfe53225b1170d276cc101c2e")
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var (
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barNodeBlob []byte
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barNodeObj *cachedNode
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)
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if memonly {
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barNodeObj = triedb.dirties[barNodeHash]
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delete(triedb.dirties, barNodeHash)
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} else {
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barNodeBlob, _ = diskdb.Get(barNodeHash[:])
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diskdb.Delete(barNodeHash[:])
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}
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// Create a new iterator that seeks to "bars". Seeking can't proceed because
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// the node is missing.
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tr, _ := New(TrieID(root), triedb)
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it := tr.NodeIterator([]byte("bars"))
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missing, ok := it.Error().(*MissingNodeError)
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if !ok {
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t.Fatal("want MissingNodeError, got", it.Error())
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} else if missing.NodeHash != barNodeHash {
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t.Fatal("wrong node missing")
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}
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// Reinsert the missing node.
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if memonly {
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triedb.dirties[barNodeHash] = barNodeObj
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} else {
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diskdb.Put(barNodeHash[:], barNodeBlob)
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}
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// Check that iteration produces the right set of values.
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if err := checkIteratorOrder(testdata1[2:], NewIterator(it)); err != nil {
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t.Fatal(err)
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}
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}
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func checkIteratorNoDups(t *testing.T, it NodeIterator, seen map[string]bool) int {
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if seen == nil {
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seen = make(map[string]bool)
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}
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for it.Next(true) {
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if seen[string(it.Path())] {
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t.Fatalf("iterator visited node path %x twice", it.Path())
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}
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seen[string(it.Path())] = true
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}
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return len(seen)
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}
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type loggingDb struct {
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getCount uint64
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backend ethdb.KeyValueStore
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}
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func (l *loggingDb) Has(key []byte) (bool, error) {
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return l.backend.Has(key)
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}
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func (l *loggingDb) Get(key []byte) ([]byte, error) {
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l.getCount++
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return l.backend.Get(key)
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}
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func (l *loggingDb) Put(key []byte, value []byte) error {
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return l.backend.Put(key, value)
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}
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func (l *loggingDb) Delete(key []byte) error {
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return l.backend.Delete(key)
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}
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|
|
func (l *loggingDb) NewBatch() ethdb.Batch {
|
|
return l.backend.NewBatch()
|
|
}
|
|
|
|
func (l *loggingDb) NewBatchWithSize(size int) ethdb.Batch {
|
|
return l.backend.NewBatchWithSize(size)
|
|
}
|
|
|
|
func (l *loggingDb) NewIterator(prefix []byte, start []byte) ethdb.Iterator {
|
|
return l.backend.NewIterator(prefix, start)
|
|
}
|
|
|
|
func (l *loggingDb) NewSnapshot() (ethdb.Snapshot, error) {
|
|
return l.backend.NewSnapshot()
|
|
}
|
|
|
|
func (l *loggingDb) Stat(property string) (string, error) {
|
|
return l.backend.Stat(property)
|
|
}
|
|
|
|
func (l *loggingDb) Compact(start []byte, limit []byte) error {
|
|
return l.backend.Compact(start, limit)
|
|
}
|
|
|
|
func (l *loggingDb) Close() error {
|
|
return l.backend.Close()
|
|
}
|
|
|
|
// makeLargeTestTrie create a sample test trie
|
|
func makeLargeTestTrie() (*Database, *StateTrie, *loggingDb) {
|
|
// Create an empty trie
|
|
logDb := &loggingDb{0, memorydb.New()}
|
|
triedb := NewDatabase(rawdb.NewDatabase(logDb))
|
|
trie, _ := NewStateTrie(TrieID(common.Hash{}), triedb)
|
|
|
|
// Fill it with some arbitrary data
|
|
for i := 0; i < 10000; i++ {
|
|
key := make([]byte, 32)
|
|
val := make([]byte, 32)
|
|
binary.BigEndian.PutUint64(key, uint64(i))
|
|
binary.BigEndian.PutUint64(val, uint64(i))
|
|
key = crypto.Keccak256(key)
|
|
val = crypto.Keccak256(val)
|
|
trie.Update(key, val)
|
|
}
|
|
_, nodes, _ := trie.Commit(false)
|
|
triedb.Update(NewWithNodeSet(nodes))
|
|
// Return the generated trie
|
|
return triedb, trie, logDb
|
|
}
|
|
|
|
// Tests that the node iterator indeed walks over the entire database contents.
|
|
func TestNodeIteratorLargeTrie(t *testing.T) {
|
|
// Create some arbitrary test trie to iterate
|
|
db, trie, logDb := makeLargeTestTrie()
|
|
db.Cap(0) // flush everything
|
|
// Do a seek operation
|
|
trie.NodeIterator(common.FromHex("0x77667766776677766778855885885885"))
|
|
// master: 24 get operations
|
|
// this pr: 5 get operations
|
|
if have, want := logDb.getCount, uint64(5); have != want {
|
|
t.Fatalf("Too many lookups during seek, have %d want %d", have, want)
|
|
}
|
|
}
|
|
|
|
func TestIteratorNodeBlob(t *testing.T) {
|
|
var (
|
|
db = rawdb.NewMemoryDatabase()
|
|
triedb = NewDatabase(db)
|
|
trie = NewEmpty(triedb)
|
|
)
|
|
vals := []struct{ k, v string }{
|
|
{"do", "verb"},
|
|
{"ether", "wookiedoo"},
|
|
{"horse", "stallion"},
|
|
{"shaman", "horse"},
|
|
{"doge", "coin"},
|
|
{"dog", "puppy"},
|
|
{"somethingveryoddindeedthis is", "myothernodedata"},
|
|
}
|
|
all := make(map[string]string)
|
|
for _, val := range vals {
|
|
all[val.k] = val.v
|
|
trie.Update([]byte(val.k), []byte(val.v))
|
|
}
|
|
_, nodes, _ := trie.Commit(false)
|
|
triedb.Update(NewWithNodeSet(nodes))
|
|
triedb.Cap(0)
|
|
|
|
found := make(map[common.Hash][]byte)
|
|
it := trie.NodeIterator(nil)
|
|
for it.Next(true) {
|
|
if it.Hash() == (common.Hash{}) {
|
|
continue
|
|
}
|
|
found[it.Hash()] = it.NodeBlob()
|
|
}
|
|
|
|
dbIter := db.NewIterator(nil, nil)
|
|
defer dbIter.Release()
|
|
|
|
var count int
|
|
for dbIter.Next() {
|
|
got, present := found[common.BytesToHash(dbIter.Key())]
|
|
if !present {
|
|
t.Fatalf("Miss trie node %v", dbIter.Key())
|
|
}
|
|
if !bytes.Equal(got, dbIter.Value()) {
|
|
t.Fatalf("Unexpected trie node want %v got %v", dbIter.Value(), got)
|
|
}
|
|
count += 1
|
|
}
|
|
if count != len(found) {
|
|
t.Fatal("Find extra trie node via iterator")
|
|
}
|
|
}
|