plugeth/core/rawdb/freezer_test.go
Martin Holst Swende b7a6409cc1
core/rawdb: better error message in freezer (#23901)
* core/rawdb: better error message in freezer

* Apply suggestions from code review
2021-11-16 11:33:56 +02:00

302 lines
8.2 KiB
Go

// Copyright 2021 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 rawdb
import (
"bytes"
"errors"
"fmt"
"io/ioutil"
"math/big"
"math/rand"
"os"
"sync"
"testing"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/rlp"
"github.com/stretchr/testify/require"
)
var freezerTestTableDef = map[string]bool{"test": true}
func TestFreezerModify(t *testing.T) {
t.Parallel()
// Create test data.
var valuesRaw [][]byte
var valuesRLP []*big.Int
for x := 0; x < 100; x++ {
v := getChunk(256, x)
valuesRaw = append(valuesRaw, v)
iv := big.NewInt(int64(x))
iv = iv.Exp(iv, iv, nil)
valuesRLP = append(valuesRLP, iv)
}
tables := map[string]bool{"raw": true, "rlp": false}
f, dir := newFreezerForTesting(t, tables)
defer os.RemoveAll(dir)
defer f.Close()
// Commit test data.
_, err := f.ModifyAncients(func(op ethdb.AncientWriteOp) error {
for i := range valuesRaw {
if err := op.AppendRaw("raw", uint64(i), valuesRaw[i]); err != nil {
return err
}
if err := op.Append("rlp", uint64(i), valuesRLP[i]); err != nil {
return err
}
}
return nil
})
if err != nil {
t.Fatal("ModifyAncients failed:", err)
}
// Dump indexes.
for _, table := range f.tables {
t.Log(table.name, "index:", table.dumpIndexString(0, int64(len(valuesRaw))))
}
// Read back test data.
checkAncientCount(t, f, "raw", uint64(len(valuesRaw)))
checkAncientCount(t, f, "rlp", uint64(len(valuesRLP)))
for i := range valuesRaw {
v, _ := f.Ancient("raw", uint64(i))
if !bytes.Equal(v, valuesRaw[i]) {
t.Fatalf("wrong raw value at %d: %x", i, v)
}
ivEnc, _ := f.Ancient("rlp", uint64(i))
want, _ := rlp.EncodeToBytes(valuesRLP[i])
if !bytes.Equal(ivEnc, want) {
t.Fatalf("wrong RLP value at %d: %x", i, ivEnc)
}
}
}
// This checks that ModifyAncients rolls back freezer updates
// when the function passed to it returns an error.
func TestFreezerModifyRollback(t *testing.T) {
t.Parallel()
f, dir := newFreezerForTesting(t, freezerTestTableDef)
defer os.RemoveAll(dir)
theError := errors.New("oops")
_, err := f.ModifyAncients(func(op ethdb.AncientWriteOp) error {
// Append three items. This creates two files immediately,
// because the table size limit of the test freezer is 2048.
require.NoError(t, op.AppendRaw("test", 0, make([]byte, 2048)))
require.NoError(t, op.AppendRaw("test", 1, make([]byte, 2048)))
require.NoError(t, op.AppendRaw("test", 2, make([]byte, 2048)))
return theError
})
if err != theError {
t.Errorf("ModifyAncients returned wrong error %q", err)
}
checkAncientCount(t, f, "test", 0)
f.Close()
// Reopen and check that the rolled-back data doesn't reappear.
tables := map[string]bool{"test": true}
f2, err := newFreezer(dir, "", false, 2049, tables)
if err != nil {
t.Fatalf("can't reopen freezer after failed ModifyAncients: %v", err)
}
defer f2.Close()
checkAncientCount(t, f2, "test", 0)
}
// This test runs ModifyAncients and Ancient concurrently with each other.
func TestFreezerConcurrentModifyRetrieve(t *testing.T) {
t.Parallel()
f, dir := newFreezerForTesting(t, freezerTestTableDef)
defer os.RemoveAll(dir)
defer f.Close()
var (
numReaders = 5
writeBatchSize = uint64(50)
written = make(chan uint64, numReaders*6)
wg sync.WaitGroup
)
wg.Add(numReaders + 1)
// Launch the writer. It appends 10000 items in batches.
go func() {
defer wg.Done()
defer close(written)
for item := uint64(0); item < 10000; item += writeBatchSize {
_, err := f.ModifyAncients(func(op ethdb.AncientWriteOp) error {
for i := uint64(0); i < writeBatchSize; i++ {
item := item + i
value := getChunk(32, int(item))
if err := op.AppendRaw("test", item, value); err != nil {
return err
}
}
return nil
})
if err != nil {
panic(err)
}
for i := 0; i < numReaders; i++ {
written <- item + writeBatchSize
}
}
}()
// Launch the readers. They read random items from the freezer up to the
// current frozen item count.
for i := 0; i < numReaders; i++ {
go func() {
defer wg.Done()
for frozen := range written {
for rc := 0; rc < 80; rc++ {
num := uint64(rand.Intn(int(frozen)))
value, err := f.Ancient("test", num)
if err != nil {
panic(fmt.Errorf("error reading %d (frozen %d): %v", num, frozen, err))
}
if !bytes.Equal(value, getChunk(32, int(num))) {
panic(fmt.Errorf("wrong value at %d", num))
}
}
}
}()
}
wg.Wait()
}
// This test runs ModifyAncients and TruncateAncients concurrently with each other.
func TestFreezerConcurrentModifyTruncate(t *testing.T) {
f, dir := newFreezerForTesting(t, freezerTestTableDef)
defer os.RemoveAll(dir)
defer f.Close()
var item = make([]byte, 256)
for i := 0; i < 1000; i++ {
// First reset and write 100 items.
if err := f.TruncateAncients(0); err != nil {
t.Fatal("truncate failed:", err)
}
_, err := f.ModifyAncients(func(op ethdb.AncientWriteOp) error {
for i := uint64(0); i < 100; i++ {
if err := op.AppendRaw("test", i, item); err != nil {
return err
}
}
return nil
})
if err != nil {
t.Fatal("modify failed:", err)
}
checkAncientCount(t, f, "test", 100)
// Now append 100 more items and truncate concurrently.
var (
wg sync.WaitGroup
truncateErr error
modifyErr error
)
wg.Add(3)
go func() {
_, modifyErr = f.ModifyAncients(func(op ethdb.AncientWriteOp) error {
for i := uint64(100); i < 200; i++ {
if err := op.AppendRaw("test", i, item); err != nil {
return err
}
}
return nil
})
wg.Done()
}()
go func() {
truncateErr = f.TruncateAncients(10)
wg.Done()
}()
go func() {
f.AncientSize("test")
wg.Done()
}()
wg.Wait()
// Now check the outcome. If the truncate operation went through first, the append
// fails, otherwise it succeeds. In either case, the freezer should be positioned
// at 10 after both operations are done.
if truncateErr != nil {
t.Fatal("concurrent truncate failed:", err)
}
if !(errors.Is(modifyErr, nil) || errors.Is(modifyErr, errOutOrderInsertion)) {
t.Fatal("wrong error from concurrent modify:", modifyErr)
}
checkAncientCount(t, f, "test", 10)
}
}
func newFreezerForTesting(t *testing.T, tables map[string]bool) (*freezer, string) {
t.Helper()
dir, err := ioutil.TempDir("", "freezer")
if err != nil {
t.Fatal(err)
}
// note: using low max table size here to ensure the tests actually
// switch between multiple files.
f, err := newFreezer(dir, "", false, 2049, tables)
if err != nil {
t.Fatal("can't open freezer", err)
}
return f, dir
}
// checkAncientCount verifies that the freezer contains n items.
func checkAncientCount(t *testing.T, f *freezer, kind string, n uint64) {
t.Helper()
if frozen, _ := f.Ancients(); frozen != n {
t.Fatalf("Ancients() returned %d, want %d", frozen, n)
}
// Check at index n-1.
if n > 0 {
index := n - 1
if ok, _ := f.HasAncient(kind, index); !ok {
t.Errorf("HasAncient(%q, %d) returned false unexpectedly", kind, index)
}
if _, err := f.Ancient(kind, index); err != nil {
t.Errorf("Ancient(%q, %d) returned unexpected error %q", kind, index, err)
}
}
// Check at index n.
index := n
if ok, _ := f.HasAncient(kind, index); ok {
t.Errorf("HasAncient(%q, %d) returned true unexpectedly", kind, index)
}
if _, err := f.Ancient(kind, index); err == nil {
t.Errorf("Ancient(%q, %d) didn't return expected error", kind, index)
} else if err != errOutOfBounds {
t.Errorf("Ancient(%q, %d) returned unexpected error %q", kind, index, err)
}
}