426 lines
15 KiB
Go
426 lines
15 KiB
Go
// Copyright 2019 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 snapshot
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"fmt"
|
|
"math/big"
|
|
"math/rand"
|
|
"testing"
|
|
|
|
"github.com/VictoriaMetrics/fastcache"
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/core/rawdb"
|
|
"github.com/ethereum/go-ethereum/rlp"
|
|
)
|
|
|
|
// randomHash generates a random blob of data and returns it as a hash.
|
|
func randomHash() common.Hash {
|
|
var hash common.Hash
|
|
if n, err := rand.Read(hash[:]); n != common.HashLength || err != nil {
|
|
panic(err)
|
|
}
|
|
return hash
|
|
}
|
|
|
|
// randomAccount generates a random account and returns it RLP encoded.
|
|
func randomAccount() []byte {
|
|
root := randomHash()
|
|
a := Account{
|
|
Balance: big.NewInt(rand.Int63()),
|
|
Nonce: rand.Uint64(),
|
|
Root: root[:],
|
|
CodeHash: emptyCode[:],
|
|
}
|
|
data, _ := rlp.EncodeToBytes(a)
|
|
return data
|
|
}
|
|
|
|
// randomAccountSet generates a set of random accounts with the given strings as
|
|
// the account address hashes.
|
|
func randomAccountSet(hashes ...string) map[common.Hash][]byte {
|
|
accounts := make(map[common.Hash][]byte)
|
|
for _, hash := range hashes {
|
|
accounts[common.HexToHash(hash)] = randomAccount()
|
|
}
|
|
return accounts
|
|
}
|
|
|
|
// randomStorageSet generates a set of random slots with the given strings as
|
|
// the slot addresses.
|
|
func randomStorageSet(accounts []string, hashes [][]string, nilStorage [][]string) map[common.Hash]map[common.Hash][]byte {
|
|
storages := make(map[common.Hash]map[common.Hash][]byte)
|
|
for index, account := range accounts {
|
|
storages[common.HexToHash(account)] = make(map[common.Hash][]byte)
|
|
|
|
if index < len(hashes) {
|
|
hashes := hashes[index]
|
|
for _, hash := range hashes {
|
|
storages[common.HexToHash(account)][common.HexToHash(hash)] = randomHash().Bytes()
|
|
}
|
|
}
|
|
if index < len(nilStorage) {
|
|
nils := nilStorage[index]
|
|
for _, hash := range nils {
|
|
storages[common.HexToHash(account)][common.HexToHash(hash)] = nil
|
|
}
|
|
}
|
|
}
|
|
return storages
|
|
}
|
|
|
|
// Tests that if a disk layer becomes stale, no active external references will
|
|
// be returned with junk data. This version of the test flattens every diff layer
|
|
// to check internal corner case around the bottom-most memory accumulator.
|
|
func TestDiskLayerExternalInvalidationFullFlatten(t *testing.T) {
|
|
// Create an empty base layer and a snapshot tree out of it
|
|
base := &diskLayer{
|
|
diskdb: rawdb.NewMemoryDatabase(),
|
|
root: common.HexToHash("0x01"),
|
|
cache: fastcache.New(1024 * 500),
|
|
}
|
|
snaps := &Tree{
|
|
layers: map[common.Hash]snapshot{
|
|
base.root: base,
|
|
},
|
|
}
|
|
// Retrieve a reference to the base and commit a diff on top
|
|
ref := snaps.Snapshot(base.root)
|
|
|
|
accounts := map[common.Hash][]byte{
|
|
common.HexToHash("0xa1"): randomAccount(),
|
|
}
|
|
if err := snaps.Update(common.HexToHash("0x02"), common.HexToHash("0x01"), nil, accounts, nil); err != nil {
|
|
t.Fatalf("failed to create a diff layer: %v", err)
|
|
}
|
|
if n := len(snaps.layers); n != 2 {
|
|
t.Errorf("pre-cap layer count mismatch: have %d, want %d", n, 2)
|
|
}
|
|
// Commit the diff layer onto the disk and ensure it's persisted
|
|
if err := snaps.Cap(common.HexToHash("0x02"), 0); err != nil {
|
|
t.Fatalf("failed to merge diff layer onto disk: %v", err)
|
|
}
|
|
// Since the base layer was modified, ensure that data retrieval on the external reference fail
|
|
if acc, err := ref.Account(common.HexToHash("0x01")); err != ErrSnapshotStale {
|
|
t.Errorf("stale reference returned account: %#x (err: %v)", acc, err)
|
|
}
|
|
if slot, err := ref.Storage(common.HexToHash("0xa1"), common.HexToHash("0xb1")); err != ErrSnapshotStale {
|
|
t.Errorf("stale reference returned storage slot: %#x (err: %v)", slot, err)
|
|
}
|
|
if n := len(snaps.layers); n != 1 {
|
|
t.Errorf("post-cap layer count mismatch: have %d, want %d", n, 1)
|
|
fmt.Println(snaps.layers)
|
|
}
|
|
}
|
|
|
|
// Tests that if a disk layer becomes stale, no active external references will
|
|
// be returned with junk data. This version of the test retains the bottom diff
|
|
// layer to check the usual mode of operation where the accumulator is retained.
|
|
func TestDiskLayerExternalInvalidationPartialFlatten(t *testing.T) {
|
|
// Create an empty base layer and a snapshot tree out of it
|
|
base := &diskLayer{
|
|
diskdb: rawdb.NewMemoryDatabase(),
|
|
root: common.HexToHash("0x01"),
|
|
cache: fastcache.New(1024 * 500),
|
|
}
|
|
snaps := &Tree{
|
|
layers: map[common.Hash]snapshot{
|
|
base.root: base,
|
|
},
|
|
}
|
|
// Retrieve a reference to the base and commit two diffs on top
|
|
ref := snaps.Snapshot(base.root)
|
|
|
|
accounts := map[common.Hash][]byte{
|
|
common.HexToHash("0xa1"): randomAccount(),
|
|
}
|
|
if err := snaps.Update(common.HexToHash("0x02"), common.HexToHash("0x01"), nil, accounts, nil); err != nil {
|
|
t.Fatalf("failed to create a diff layer: %v", err)
|
|
}
|
|
if err := snaps.Update(common.HexToHash("0x03"), common.HexToHash("0x02"), nil, accounts, nil); err != nil {
|
|
t.Fatalf("failed to create a diff layer: %v", err)
|
|
}
|
|
if n := len(snaps.layers); n != 3 {
|
|
t.Errorf("pre-cap layer count mismatch: have %d, want %d", n, 3)
|
|
}
|
|
// Commit the diff layer onto the disk and ensure it's persisted
|
|
defer func(memcap uint64) { aggregatorMemoryLimit = memcap }(aggregatorMemoryLimit)
|
|
aggregatorMemoryLimit = 0
|
|
|
|
if err := snaps.Cap(common.HexToHash("0x03"), 1); err != nil {
|
|
t.Fatalf("failed to merge accumulator onto disk: %v", err)
|
|
}
|
|
// Since the base layer was modified, ensure that data retrievald on the external reference fail
|
|
if acc, err := ref.Account(common.HexToHash("0x01")); err != ErrSnapshotStale {
|
|
t.Errorf("stale reference returned account: %#x (err: %v)", acc, err)
|
|
}
|
|
if slot, err := ref.Storage(common.HexToHash("0xa1"), common.HexToHash("0xb1")); err != ErrSnapshotStale {
|
|
t.Errorf("stale reference returned storage slot: %#x (err: %v)", slot, err)
|
|
}
|
|
if n := len(snaps.layers); n != 2 {
|
|
t.Errorf("post-cap layer count mismatch: have %d, want %d", n, 2)
|
|
fmt.Println(snaps.layers)
|
|
}
|
|
}
|
|
|
|
// Tests that if a diff layer becomes stale, no active external references will
|
|
// be returned with junk data. This version of the test retains the bottom diff
|
|
// layer to check the usual mode of operation where the accumulator is retained.
|
|
func TestDiffLayerExternalInvalidationPartialFlatten(t *testing.T) {
|
|
// Create an empty base layer and a snapshot tree out of it
|
|
base := &diskLayer{
|
|
diskdb: rawdb.NewMemoryDatabase(),
|
|
root: common.HexToHash("0x01"),
|
|
cache: fastcache.New(1024 * 500),
|
|
}
|
|
snaps := &Tree{
|
|
layers: map[common.Hash]snapshot{
|
|
base.root: base,
|
|
},
|
|
}
|
|
// Commit three diffs on top and retrieve a reference to the bottommost
|
|
accounts := map[common.Hash][]byte{
|
|
common.HexToHash("0xa1"): randomAccount(),
|
|
}
|
|
if err := snaps.Update(common.HexToHash("0x02"), common.HexToHash("0x01"), nil, accounts, nil); err != nil {
|
|
t.Fatalf("failed to create a diff layer: %v", err)
|
|
}
|
|
if err := snaps.Update(common.HexToHash("0x03"), common.HexToHash("0x02"), nil, accounts, nil); err != nil {
|
|
t.Fatalf("failed to create a diff layer: %v", err)
|
|
}
|
|
if err := snaps.Update(common.HexToHash("0x04"), common.HexToHash("0x03"), nil, accounts, nil); err != nil {
|
|
t.Fatalf("failed to create a diff layer: %v", err)
|
|
}
|
|
if n := len(snaps.layers); n != 4 {
|
|
t.Errorf("pre-cap layer count mismatch: have %d, want %d", n, 4)
|
|
}
|
|
ref := snaps.Snapshot(common.HexToHash("0x02"))
|
|
|
|
// Doing a Cap operation with many allowed layers should be a no-op
|
|
exp := len(snaps.layers)
|
|
if err := snaps.Cap(common.HexToHash("0x04"), 2000); err != nil {
|
|
t.Fatalf("failed to flatten diff layer into accumulator: %v", err)
|
|
}
|
|
if got := len(snaps.layers); got != exp {
|
|
t.Errorf("layers modified, got %d exp %d", got, exp)
|
|
}
|
|
// Flatten the diff layer into the bottom accumulator
|
|
if err := snaps.Cap(common.HexToHash("0x04"), 1); err != nil {
|
|
t.Fatalf("failed to flatten diff layer into accumulator: %v", err)
|
|
}
|
|
// Since the accumulator diff layer was modified, ensure that data retrievald on the external reference fail
|
|
if acc, err := ref.Account(common.HexToHash("0x01")); err != ErrSnapshotStale {
|
|
t.Errorf("stale reference returned account: %#x (err: %v)", acc, err)
|
|
}
|
|
if slot, err := ref.Storage(common.HexToHash("0xa1"), common.HexToHash("0xb1")); err != ErrSnapshotStale {
|
|
t.Errorf("stale reference returned storage slot: %#x (err: %v)", slot, err)
|
|
}
|
|
if n := len(snaps.layers); n != 3 {
|
|
t.Errorf("post-cap layer count mismatch: have %d, want %d", n, 3)
|
|
fmt.Println(snaps.layers)
|
|
}
|
|
}
|
|
|
|
// TestPostCapBasicDataAccess tests some functionality regarding capping/flattening.
|
|
func TestPostCapBasicDataAccess(t *testing.T) {
|
|
// setAccount is a helper to construct a random account entry and assign it to
|
|
// an account slot in a snapshot
|
|
setAccount := func(accKey string) map[common.Hash][]byte {
|
|
return map[common.Hash][]byte{
|
|
common.HexToHash(accKey): randomAccount(),
|
|
}
|
|
}
|
|
// Create a starting base layer and a snapshot tree out of it
|
|
base := &diskLayer{
|
|
diskdb: rawdb.NewMemoryDatabase(),
|
|
root: common.HexToHash("0x01"),
|
|
cache: fastcache.New(1024 * 500),
|
|
}
|
|
snaps := &Tree{
|
|
layers: map[common.Hash]snapshot{
|
|
base.root: base,
|
|
},
|
|
}
|
|
// The lowest difflayer
|
|
snaps.Update(common.HexToHash("0xa1"), common.HexToHash("0x01"), nil, setAccount("0xa1"), nil)
|
|
snaps.Update(common.HexToHash("0xa2"), common.HexToHash("0xa1"), nil, setAccount("0xa2"), nil)
|
|
snaps.Update(common.HexToHash("0xb2"), common.HexToHash("0xa1"), nil, setAccount("0xb2"), nil)
|
|
|
|
snaps.Update(common.HexToHash("0xa3"), common.HexToHash("0xa2"), nil, setAccount("0xa3"), nil)
|
|
snaps.Update(common.HexToHash("0xb3"), common.HexToHash("0xb2"), nil, setAccount("0xb3"), nil)
|
|
|
|
// checkExist verifies if an account exiss in a snapshot
|
|
checkExist := func(layer *diffLayer, key string) error {
|
|
if data, _ := layer.Account(common.HexToHash(key)); data == nil {
|
|
return fmt.Errorf("expected %x to exist, got nil", common.HexToHash(key))
|
|
}
|
|
return nil
|
|
}
|
|
// shouldErr checks that an account access errors as expected
|
|
shouldErr := func(layer *diffLayer, key string) error {
|
|
if data, err := layer.Account(common.HexToHash(key)); err == nil {
|
|
return fmt.Errorf("expected error, got data %x", data)
|
|
}
|
|
return nil
|
|
}
|
|
// check basics
|
|
snap := snaps.Snapshot(common.HexToHash("0xb3")).(*diffLayer)
|
|
|
|
if err := checkExist(snap, "0xa1"); err != nil {
|
|
t.Error(err)
|
|
}
|
|
if err := checkExist(snap, "0xb2"); err != nil {
|
|
t.Error(err)
|
|
}
|
|
if err := checkExist(snap, "0xb3"); err != nil {
|
|
t.Error(err)
|
|
}
|
|
// Cap to a bad root should fail
|
|
if err := snaps.Cap(common.HexToHash("0x1337"), 0); err == nil {
|
|
t.Errorf("expected error, got none")
|
|
}
|
|
// Now, merge the a-chain
|
|
snaps.Cap(common.HexToHash("0xa3"), 0)
|
|
|
|
// At this point, a2 got merged into a1. Thus, a1 is now modified, and as a1 is
|
|
// the parent of b2, b2 should no longer be able to iterate into parent.
|
|
|
|
// These should still be accessible
|
|
if err := checkExist(snap, "0xb2"); err != nil {
|
|
t.Error(err)
|
|
}
|
|
if err := checkExist(snap, "0xb3"); err != nil {
|
|
t.Error(err)
|
|
}
|
|
// But these would need iteration into the modified parent
|
|
if err := shouldErr(snap, "0xa1"); err != nil {
|
|
t.Error(err)
|
|
}
|
|
if err := shouldErr(snap, "0xa2"); err != nil {
|
|
t.Error(err)
|
|
}
|
|
if err := shouldErr(snap, "0xa3"); err != nil {
|
|
t.Error(err)
|
|
}
|
|
// Now, merge it again, just for fun. It should now error, since a3
|
|
// is a disk layer
|
|
if err := snaps.Cap(common.HexToHash("0xa3"), 0); err == nil {
|
|
t.Error("expected error capping the disk layer, got none")
|
|
}
|
|
}
|
|
|
|
// TestSnaphots tests the functionality for retrieveing the snapshot
|
|
// with given head root and the desired depth.
|
|
func TestSnaphots(t *testing.T) {
|
|
// setAccount is a helper to construct a random account entry and assign it to
|
|
// an account slot in a snapshot
|
|
setAccount := func(accKey string) map[common.Hash][]byte {
|
|
return map[common.Hash][]byte{
|
|
common.HexToHash(accKey): randomAccount(),
|
|
}
|
|
}
|
|
makeRoot := func(height uint64) common.Hash {
|
|
var buffer [8]byte
|
|
binary.BigEndian.PutUint64(buffer[:], height)
|
|
return common.BytesToHash(buffer[:])
|
|
}
|
|
// Create a starting base layer and a snapshot tree out of it
|
|
base := &diskLayer{
|
|
diskdb: rawdb.NewMemoryDatabase(),
|
|
root: makeRoot(1),
|
|
cache: fastcache.New(1024 * 500),
|
|
}
|
|
snaps := &Tree{
|
|
layers: map[common.Hash]snapshot{
|
|
base.root: base,
|
|
},
|
|
}
|
|
// Construct the snapshots with 129 layers, flattening whatever's above that
|
|
var (
|
|
last = common.HexToHash("0x01")
|
|
head common.Hash
|
|
)
|
|
for i := 0; i < 129; i++ {
|
|
head = makeRoot(uint64(i + 2))
|
|
snaps.Update(head, last, nil, setAccount(fmt.Sprintf("%d", i+2)), nil)
|
|
last = head
|
|
snaps.Cap(head, 128) // 130 layers (128 diffs + 1 accumulator + 1 disk)
|
|
}
|
|
var cases = []struct {
|
|
headRoot common.Hash
|
|
limit int
|
|
nodisk bool
|
|
expected int
|
|
expectBottom common.Hash
|
|
}{
|
|
{head, 0, false, 0, common.Hash{}},
|
|
{head, 64, false, 64, makeRoot(129 + 2 - 64)},
|
|
{head, 128, false, 128, makeRoot(3)}, // Normal diff layers, no accumulator
|
|
{head, 129, true, 129, makeRoot(2)}, // All diff layers, including accumulator
|
|
{head, 130, false, 130, makeRoot(1)}, // All diff layers + disk layer
|
|
}
|
|
for i, c := range cases {
|
|
layers := snaps.Snapshots(c.headRoot, c.limit, c.nodisk)
|
|
if len(layers) != c.expected {
|
|
t.Errorf("non-overflow test %d: returned snapshot layers are mismatched, want %v, got %v", i, c.expected, len(layers))
|
|
}
|
|
if len(layers) == 0 {
|
|
continue
|
|
}
|
|
bottommost := layers[len(layers)-1]
|
|
if bottommost.Root() != c.expectBottom {
|
|
t.Errorf("non-overflow test %d: snapshot mismatch, want %v, get %v", i, c.expectBottom, bottommost.Root())
|
|
}
|
|
}
|
|
// Above we've tested the normal capping, which leaves the accumulator live.
|
|
// Test that if the bottommost accumulator diff layer overflows the allowed
|
|
// memory limit, the snapshot tree gets capped to one less layer.
|
|
// Commit the diff layer onto the disk and ensure it's persisted
|
|
defer func(memcap uint64) { aggregatorMemoryLimit = memcap }(aggregatorMemoryLimit)
|
|
aggregatorMemoryLimit = 0
|
|
|
|
snaps.Cap(head, 128) // 129 (128 diffs + 1 overflown accumulator + 1 disk)
|
|
|
|
cases = []struct {
|
|
headRoot common.Hash
|
|
limit int
|
|
nodisk bool
|
|
expected int
|
|
expectBottom common.Hash
|
|
}{
|
|
{head, 0, false, 0, common.Hash{}},
|
|
{head, 64, false, 64, makeRoot(129 + 2 - 64)},
|
|
{head, 128, false, 128, makeRoot(3)}, // All diff layers, accumulator was flattened
|
|
{head, 129, true, 128, makeRoot(3)}, // All diff layers, accumulator was flattened
|
|
{head, 130, false, 129, makeRoot(2)}, // All diff layers + disk layer
|
|
}
|
|
for i, c := range cases {
|
|
layers := snaps.Snapshots(c.headRoot, c.limit, c.nodisk)
|
|
if len(layers) != c.expected {
|
|
t.Errorf("overflow test %d: returned snapshot layers are mismatched, want %v, got %v", i, c.expected, len(layers))
|
|
}
|
|
if len(layers) == 0 {
|
|
continue
|
|
}
|
|
bottommost := layers[len(layers)-1]
|
|
if bottommost.Root() != c.expectBottom {
|
|
t.Errorf("overflow test %d: snapshot mismatch, want %v, get %v", i, c.expectBottom, bottommost.Root())
|
|
}
|
|
}
|
|
}
|