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