fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
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926 lines
28 KiB
926 lines
28 KiB
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "db/log_reader.h"
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#include "db/log_writer.h"
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#include "env/composite_env_wrapper.h"
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#include "file/sequence_file_reader.h"
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#include "file/writable_file_writer.h"
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#include "rocksdb/env.h"
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#include "test_util/testharness.h"
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#include "test_util/testutil.h"
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#include "util/coding.h"
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#include "util/crc32c.h"
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#include "util/random.h"
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namespace ROCKSDB_NAMESPACE {
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namespace log {
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// Construct a string of the specified length made out of the supplied
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// partial string.
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static std::string BigString(const std::string& partial_string, size_t n) {
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std::string result;
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while (result.size() < n) {
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result.append(partial_string);
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}
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result.resize(n);
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return result;
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}
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// Construct a string from a number
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static std::string NumberString(int n) {
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char buf[50];
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snprintf(buf, sizeof(buf), "%d.", n);
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return std::string(buf);
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}
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// Return a skewed potentially long string
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static std::string RandomSkewedString(int i, Random* rnd) {
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return BigString(NumberString(i), rnd->Skewed(17));
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}
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// Param type is tuple<int, bool>
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// get<0>(tuple): non-zero if recycling log, zero if regular log
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// get<1>(tuple): true if allow retry after read EOF, false otherwise
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class LogTest : public ::testing::TestWithParam<std::tuple<int, bool>> {
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private:
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class StringSource : public SequentialFile {
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public:
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Slice& contents_;
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bool force_error_;
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size_t force_error_position_;
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bool force_eof_;
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size_t force_eof_position_;
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bool returned_partial_;
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bool fail_after_read_partial_;
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explicit StringSource(Slice& contents, bool fail_after_read_partial)
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: contents_(contents),
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force_error_(false),
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force_error_position_(0),
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force_eof_(false),
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force_eof_position_(0),
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returned_partial_(false),
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fail_after_read_partial_(fail_after_read_partial) {}
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Status Read(size_t n, Slice* result, char* scratch) override {
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if (fail_after_read_partial_) {
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EXPECT_TRUE(!returned_partial_) << "must not Read() after eof/error";
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}
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if (force_error_) {
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if (force_error_position_ >= n) {
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force_error_position_ -= n;
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} else {
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*result = Slice(contents_.data(), force_error_position_);
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contents_.remove_prefix(force_error_position_);
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force_error_ = false;
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returned_partial_ = true;
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return Status::Corruption("read error");
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}
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}
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if (contents_.size() < n) {
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n = contents_.size();
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returned_partial_ = true;
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}
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if (force_eof_) {
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if (force_eof_position_ >= n) {
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force_eof_position_ -= n;
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} else {
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force_eof_ = false;
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n = force_eof_position_;
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returned_partial_ = true;
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}
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}
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// By using scratch we ensure that caller has control over the
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// lifetime of result.data()
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memcpy(scratch, contents_.data(), n);
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*result = Slice(scratch, n);
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contents_.remove_prefix(n);
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return Status::OK();
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}
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Status Skip(uint64_t n) override {
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if (n > contents_.size()) {
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contents_.clear();
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return Status::NotFound("in-memory file skipepd past end");
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}
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contents_.remove_prefix(n);
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return Status::OK();
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}
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};
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inline StringSource* GetStringSourceFromLegacyReader(
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SequentialFileReader* reader) {
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LegacySequentialFileWrapper* file =
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static_cast<LegacySequentialFileWrapper*>(reader->file());
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return static_cast<StringSource*>(file->target());
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}
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class ReportCollector : public Reader::Reporter {
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public:
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size_t dropped_bytes_;
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std::string message_;
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ReportCollector() : dropped_bytes_(0) { }
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void Corruption(size_t bytes, const Status& status) override {
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dropped_bytes_ += bytes;
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message_.append(status.ToString());
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}
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};
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std::string& dest_contents() {
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auto dest = test::GetStringSinkFromLegacyWriter(writer_.file());
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assert(dest);
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return dest->contents_;
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}
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const std::string& dest_contents() const {
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auto dest = test::GetStringSinkFromLegacyWriter(writer_.file());
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assert(dest);
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return dest->contents_;
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}
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void reset_source_contents() {
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auto src = GetStringSourceFromLegacyReader(reader_->file());
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assert(src);
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src->contents_ = dest_contents();
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}
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Slice reader_contents_;
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std::unique_ptr<WritableFileWriter> dest_holder_;
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std::unique_ptr<SequentialFileReader> source_holder_;
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ReportCollector report_;
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Writer writer_;
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std::unique_ptr<Reader> reader_;
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protected:
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bool allow_retry_read_;
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public:
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LogTest()
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: reader_contents_(),
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dest_holder_(test::GetWritableFileWriter(
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new test::StringSink(&reader_contents_), "" /* don't care */)),
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source_holder_(test::GetSequentialFileReader(
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new StringSource(reader_contents_, !std::get<1>(GetParam())),
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"" /* file name */)),
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writer_(std::move(dest_holder_), 123, std::get<0>(GetParam())),
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allow_retry_read_(std::get<1>(GetParam())) {
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if (allow_retry_read_) {
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reader_.reset(new FragmentBufferedReader(
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nullptr, std::move(source_holder_), &report_, true /* checksum */,
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123 /* log_number */));
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} else {
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reader_.reset(new Reader(nullptr, std::move(source_holder_), &report_,
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true /* checksum */, 123 /* log_number */));
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}
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}
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Slice* get_reader_contents() { return &reader_contents_; }
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void Write(const std::string& msg) {
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writer_.AddRecord(Slice(msg));
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}
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size_t WrittenBytes() const {
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return dest_contents().size();
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}
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std::string Read(const WALRecoveryMode wal_recovery_mode =
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WALRecoveryMode::kTolerateCorruptedTailRecords) {
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std::string scratch;
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Slice record;
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bool ret = false;
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ret = reader_->ReadRecord(&record, &scratch, wal_recovery_mode);
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if (ret) {
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return record.ToString();
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} else {
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return "EOF";
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}
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}
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void IncrementByte(int offset, char delta) {
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dest_contents()[offset] += delta;
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}
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void SetByte(int offset, char new_byte) {
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dest_contents()[offset] = new_byte;
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}
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void ShrinkSize(int bytes) {
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auto dest = test::GetStringSinkFromLegacyWriter(writer_.file());
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assert(dest);
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dest->Drop(bytes);
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}
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void FixChecksum(int header_offset, int len, bool recyclable) {
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// Compute crc of type/len/data
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int header_size = recyclable ? kRecyclableHeaderSize : kHeaderSize;
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uint32_t crc = crc32c::Value(&dest_contents()[header_offset + 6],
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header_size - 6 + len);
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crc = crc32c::Mask(crc);
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EncodeFixed32(&dest_contents()[header_offset], crc);
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}
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void ForceError(size_t position = 0) {
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auto src = GetStringSourceFromLegacyReader(reader_->file());
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src->force_error_ = true;
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src->force_error_position_ = position;
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}
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size_t DroppedBytes() const {
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return report_.dropped_bytes_;
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}
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std::string ReportMessage() const {
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return report_.message_;
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}
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void ForceEOF(size_t position = 0) {
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auto src = GetStringSourceFromLegacyReader(reader_->file());
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src->force_eof_ = true;
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src->force_eof_position_ = position;
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}
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void UnmarkEOF() {
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auto src = GetStringSourceFromLegacyReader(reader_->file());
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src->returned_partial_ = false;
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reader_->UnmarkEOF();
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}
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bool IsEOF() { return reader_->IsEOF(); }
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// Returns OK iff recorded error message contains "msg"
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std::string MatchError(const std::string& msg) const {
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if (report_.message_.find(msg) == std::string::npos) {
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return report_.message_;
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} else {
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return "OK";
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}
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}
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};
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TEST_P(LogTest, Empty) { ASSERT_EQ("EOF", Read()); }
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TEST_P(LogTest, ReadWrite) {
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Write("foo");
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Write("bar");
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Write("");
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Write("xxxx");
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ASSERT_EQ("foo", Read());
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ASSERT_EQ("bar", Read());
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ASSERT_EQ("", Read());
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ASSERT_EQ("xxxx", Read());
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ASSERT_EQ("EOF", Read());
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ASSERT_EQ("EOF", Read()); // Make sure reads at eof work
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}
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TEST_P(LogTest, ManyBlocks) {
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for (int i = 0; i < 100000; i++) {
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Write(NumberString(i));
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}
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for (int i = 0; i < 100000; i++) {
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ASSERT_EQ(NumberString(i), Read());
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}
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ASSERT_EQ("EOF", Read());
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}
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TEST_P(LogTest, Fragmentation) {
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Write("small");
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Write(BigString("medium", 50000));
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Write(BigString("large", 100000));
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ASSERT_EQ("small", Read());
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ASSERT_EQ(BigString("medium", 50000), Read());
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ASSERT_EQ(BigString("large", 100000), Read());
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ASSERT_EQ("EOF", Read());
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}
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TEST_P(LogTest, MarginalTrailer) {
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// Make a trailer that is exactly the same length as an empty record.
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int header_size =
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std::get<0>(GetParam()) ? kRecyclableHeaderSize : kHeaderSize;
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const int n = kBlockSize - 2 * header_size;
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Write(BigString("foo", n));
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ASSERT_EQ((unsigned int)(kBlockSize - header_size), WrittenBytes());
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Write("");
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Write("bar");
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ASSERT_EQ(BigString("foo", n), Read());
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ASSERT_EQ("", Read());
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ASSERT_EQ("bar", Read());
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ASSERT_EQ("EOF", Read());
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}
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TEST_P(LogTest, MarginalTrailer2) {
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// Make a trailer that is exactly the same length as an empty record.
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int header_size =
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std::get<0>(GetParam()) ? kRecyclableHeaderSize : kHeaderSize;
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const int n = kBlockSize - 2 * header_size;
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Write(BigString("foo", n));
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ASSERT_EQ((unsigned int)(kBlockSize - header_size), WrittenBytes());
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Write("bar");
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ASSERT_EQ(BigString("foo", n), Read());
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ASSERT_EQ("bar", Read());
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ASSERT_EQ("EOF", Read());
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ASSERT_EQ(0U, DroppedBytes());
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ASSERT_EQ("", ReportMessage());
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}
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TEST_P(LogTest, ShortTrailer) {
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int header_size =
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std::get<0>(GetParam()) ? kRecyclableHeaderSize : kHeaderSize;
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const int n = kBlockSize - 2 * header_size + 4;
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Write(BigString("foo", n));
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ASSERT_EQ((unsigned int)(kBlockSize - header_size + 4), WrittenBytes());
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Write("");
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Write("bar");
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ASSERT_EQ(BigString("foo", n), Read());
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ASSERT_EQ("", Read());
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ASSERT_EQ("bar", Read());
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ASSERT_EQ("EOF", Read());
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}
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TEST_P(LogTest, AlignedEof) {
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int header_size =
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std::get<0>(GetParam()) ? kRecyclableHeaderSize : kHeaderSize;
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const int n = kBlockSize - 2 * header_size + 4;
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Write(BigString("foo", n));
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ASSERT_EQ((unsigned int)(kBlockSize - header_size + 4), WrittenBytes());
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ASSERT_EQ(BigString("foo", n), Read());
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ASSERT_EQ("EOF", Read());
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}
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TEST_P(LogTest, RandomRead) {
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const int N = 500;
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Random write_rnd(301);
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for (int i = 0; i < N; i++) {
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Write(RandomSkewedString(i, &write_rnd));
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}
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Random read_rnd(301);
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for (int i = 0; i < N; i++) {
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ASSERT_EQ(RandomSkewedString(i, &read_rnd), Read());
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}
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ASSERT_EQ("EOF", Read());
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}
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// Tests of all the error paths in log_reader.cc follow:
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TEST_P(LogTest, ReadError) {
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Write("foo");
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ForceError();
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ASSERT_EQ("EOF", Read());
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ASSERT_EQ((unsigned int)kBlockSize, DroppedBytes());
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ASSERT_EQ("OK", MatchError("read error"));
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}
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TEST_P(LogTest, BadRecordType) {
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Write("foo");
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// Type is stored in header[6]
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IncrementByte(6, 100);
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FixChecksum(0, 3, false);
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ASSERT_EQ("EOF", Read());
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ASSERT_EQ(3U, DroppedBytes());
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ASSERT_EQ("OK", MatchError("unknown record type"));
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}
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TEST_P(LogTest, TruncatedTrailingRecordIsIgnored) {
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Write("foo");
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ShrinkSize(4); // Drop all payload as well as a header byte
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ASSERT_EQ("EOF", Read());
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// Truncated last record is ignored, not treated as an error
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ASSERT_EQ(0U, DroppedBytes());
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ASSERT_EQ("", ReportMessage());
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}
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TEST_P(LogTest, TruncatedTrailingRecordIsNotIgnored) {
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if (allow_retry_read_) {
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// If read retry is allowed, then truncated trailing record should not
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// raise an error.
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return;
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}
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Write("foo");
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ShrinkSize(4); // Drop all payload as well as a header byte
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ASSERT_EQ("EOF", Read(WALRecoveryMode::kAbsoluteConsistency));
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// Truncated last record is ignored, not treated as an error
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ASSERT_GT(DroppedBytes(), 0U);
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ASSERT_EQ("OK", MatchError("Corruption: truncated header"));
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}
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TEST_P(LogTest, BadLength) {
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if (allow_retry_read_) {
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// If read retry is allowed, then we should not raise an error when the
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// record length specified in header is longer than data currently
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// available. It's possible that the body of the record is not written yet.
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return;
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}
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bool recyclable_log = (std::get<0>(GetParam()) != 0);
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int header_size = recyclable_log ? kRecyclableHeaderSize : kHeaderSize;
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const int kPayloadSize = kBlockSize - header_size;
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Write(BigString("bar", kPayloadSize));
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Write("foo");
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// Least significant size byte is stored in header[4].
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IncrementByte(4, 1);
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if (!recyclable_log) {
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ASSERT_EQ("foo", Read());
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ASSERT_EQ(kBlockSize, DroppedBytes());
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ASSERT_EQ("OK", MatchError("bad record length"));
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} else {
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ASSERT_EQ("EOF", Read());
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}
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}
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TEST_P(LogTest, BadLengthAtEndIsIgnored) {
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if (allow_retry_read_) {
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// If read retry is allowed, then we should not raise an error when the
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// record length specified in header is longer than data currently
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// available. It's possible that the body of the record is not written yet.
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return;
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}
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Write("foo");
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ShrinkSize(1);
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ASSERT_EQ("EOF", Read());
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ASSERT_EQ(0U, DroppedBytes());
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ASSERT_EQ("", ReportMessage());
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}
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TEST_P(LogTest, BadLengthAtEndIsNotIgnored) {
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if (allow_retry_read_) {
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// If read retry is allowed, then we should not raise an error when the
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// record length specified in header is longer than data currently
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// available. It's possible that the body of the record is not written yet.
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return;
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}
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Write("foo");
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ShrinkSize(1);
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ASSERT_EQ("EOF", Read(WALRecoveryMode::kAbsoluteConsistency));
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ASSERT_GT(DroppedBytes(), 0U);
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ASSERT_EQ("OK", MatchError("Corruption: truncated record body"));
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}
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TEST_P(LogTest, ChecksumMismatch) {
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Write("foooooo");
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IncrementByte(0, 14);
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ASSERT_EQ("EOF", Read());
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bool recyclable_log = (std::get<0>(GetParam()) != 0);
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if (!recyclable_log) {
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ASSERT_EQ(14U, DroppedBytes());
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ASSERT_EQ("OK", MatchError("checksum mismatch"));
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} else {
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ASSERT_EQ(0U, DroppedBytes());
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ASSERT_EQ("", ReportMessage());
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}
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}
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TEST_P(LogTest, UnexpectedMiddleType) {
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Write("foo");
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bool recyclable_log = (std::get<0>(GetParam()) != 0);
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SetByte(6, static_cast<char>(recyclable_log ? kRecyclableMiddleType
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: kMiddleType));
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FixChecksum(0, 3, !!recyclable_log);
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ASSERT_EQ("EOF", Read());
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ASSERT_EQ(3U, DroppedBytes());
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ASSERT_EQ("OK", MatchError("missing start"));
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}
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TEST_P(LogTest, UnexpectedLastType) {
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Write("foo");
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bool recyclable_log = (std::get<0>(GetParam()) != 0);
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SetByte(6,
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static_cast<char>(recyclable_log ? kRecyclableLastType : kLastType));
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FixChecksum(0, 3, !!recyclable_log);
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ASSERT_EQ("EOF", Read());
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ASSERT_EQ(3U, DroppedBytes());
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ASSERT_EQ("OK", MatchError("missing start"));
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}
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TEST_P(LogTest, UnexpectedFullType) {
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Write("foo");
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Write("bar");
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bool recyclable_log = (std::get<0>(GetParam()) != 0);
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SetByte(
|
|
6, static_cast<char>(recyclable_log ? kRecyclableFirstType : kFirstType));
|
|
FixChecksum(0, 3, !!recyclable_log);
|
|
ASSERT_EQ("bar", Read());
|
|
ASSERT_EQ("EOF", Read());
|
|
ASSERT_EQ(3U, DroppedBytes());
|
|
ASSERT_EQ("OK", MatchError("partial record without end"));
|
|
}
|
|
|
|
TEST_P(LogTest, UnexpectedFirstType) {
|
|
Write("foo");
|
|
Write(BigString("bar", 100000));
|
|
bool recyclable_log = (std::get<0>(GetParam()) != 0);
|
|
SetByte(
|
|
6, static_cast<char>(recyclable_log ? kRecyclableFirstType : kFirstType));
|
|
FixChecksum(0, 3, !!recyclable_log);
|
|
ASSERT_EQ(BigString("bar", 100000), Read());
|
|
ASSERT_EQ("EOF", Read());
|
|
ASSERT_EQ(3U, DroppedBytes());
|
|
ASSERT_EQ("OK", MatchError("partial record without end"));
|
|
}
|
|
|
|
TEST_P(LogTest, MissingLastIsIgnored) {
|
|
Write(BigString("bar", kBlockSize));
|
|
// Remove the LAST block, including header.
|
|
ShrinkSize(14);
|
|
ASSERT_EQ("EOF", Read());
|
|
ASSERT_EQ("", ReportMessage());
|
|
ASSERT_EQ(0U, DroppedBytes());
|
|
}
|
|
|
|
TEST_P(LogTest, MissingLastIsNotIgnored) {
|
|
if (allow_retry_read_) {
|
|
// If read retry is allowed, then truncated trailing record should not
|
|
// raise an error.
|
|
return;
|
|
}
|
|
Write(BigString("bar", kBlockSize));
|
|
// Remove the LAST block, including header.
|
|
ShrinkSize(14);
|
|
ASSERT_EQ("EOF", Read(WALRecoveryMode::kAbsoluteConsistency));
|
|
ASSERT_GT(DroppedBytes(), 0U);
|
|
ASSERT_EQ("OK", MatchError("Corruption: error reading trailing data"));
|
|
}
|
|
|
|
TEST_P(LogTest, PartialLastIsIgnored) {
|
|
Write(BigString("bar", kBlockSize));
|
|
// Cause a bad record length in the LAST block.
|
|
ShrinkSize(1);
|
|
ASSERT_EQ("EOF", Read());
|
|
ASSERT_EQ("", ReportMessage());
|
|
ASSERT_EQ(0U, DroppedBytes());
|
|
}
|
|
|
|
TEST_P(LogTest, PartialLastIsNotIgnored) {
|
|
if (allow_retry_read_) {
|
|
// If read retry is allowed, then truncated trailing record should not
|
|
// raise an error.
|
|
return;
|
|
}
|
|
Write(BigString("bar", kBlockSize));
|
|
// Cause a bad record length in the LAST block.
|
|
ShrinkSize(1);
|
|
ASSERT_EQ("EOF", Read(WALRecoveryMode::kAbsoluteConsistency));
|
|
ASSERT_GT(DroppedBytes(), 0U);
|
|
ASSERT_EQ("OK", MatchError("Corruption: truncated record body"));
|
|
}
|
|
|
|
TEST_P(LogTest, ErrorJoinsRecords) {
|
|
// Consider two fragmented records:
|
|
// first(R1) last(R1) first(R2) last(R2)
|
|
// where the middle two fragments disappear. We do not want
|
|
// first(R1),last(R2) to get joined and returned as a valid record.
|
|
|
|
// Write records that span two blocks
|
|
Write(BigString("foo", kBlockSize));
|
|
Write(BigString("bar", kBlockSize));
|
|
Write("correct");
|
|
|
|
// Wipe the middle block
|
|
for (unsigned int offset = kBlockSize; offset < 2*kBlockSize; offset++) {
|
|
SetByte(offset, 'x');
|
|
}
|
|
|
|
bool recyclable_log = (std::get<0>(GetParam()) != 0);
|
|
if (!recyclable_log) {
|
|
ASSERT_EQ("correct", Read());
|
|
ASSERT_EQ("EOF", Read());
|
|
size_t dropped = DroppedBytes();
|
|
ASSERT_LE(dropped, 2 * kBlockSize + 100);
|
|
ASSERT_GE(dropped, 2 * kBlockSize);
|
|
} else {
|
|
ASSERT_EQ("EOF", Read());
|
|
}
|
|
}
|
|
|
|
TEST_P(LogTest, ClearEofSingleBlock) {
|
|
Write("foo");
|
|
Write("bar");
|
|
bool recyclable_log = (std::get<0>(GetParam()) != 0);
|
|
int header_size = recyclable_log ? kRecyclableHeaderSize : kHeaderSize;
|
|
ForceEOF(3 + header_size + 2);
|
|
ASSERT_EQ("foo", Read());
|
|
UnmarkEOF();
|
|
ASSERT_EQ("bar", Read());
|
|
ASSERT_TRUE(IsEOF());
|
|
ASSERT_EQ("EOF", Read());
|
|
Write("xxx");
|
|
UnmarkEOF();
|
|
ASSERT_EQ("xxx", Read());
|
|
ASSERT_TRUE(IsEOF());
|
|
}
|
|
|
|
TEST_P(LogTest, ClearEofMultiBlock) {
|
|
size_t num_full_blocks = 5;
|
|
bool recyclable_log = (std::get<0>(GetParam()) != 0);
|
|
int header_size = recyclable_log ? kRecyclableHeaderSize : kHeaderSize;
|
|
size_t n = (kBlockSize - header_size) * num_full_blocks + 25;
|
|
Write(BigString("foo", n));
|
|
Write(BigString("bar", n));
|
|
ForceEOF(n + num_full_blocks * header_size + header_size + 3);
|
|
ASSERT_EQ(BigString("foo", n), Read());
|
|
ASSERT_TRUE(IsEOF());
|
|
UnmarkEOF();
|
|
ASSERT_EQ(BigString("bar", n), Read());
|
|
ASSERT_TRUE(IsEOF());
|
|
Write(BigString("xxx", n));
|
|
UnmarkEOF();
|
|
ASSERT_EQ(BigString("xxx", n), Read());
|
|
ASSERT_TRUE(IsEOF());
|
|
}
|
|
|
|
TEST_P(LogTest, ClearEofError) {
|
|
// If an error occurs during Read() in UnmarkEOF(), the records contained
|
|
// in the buffer should be returned on subsequent calls of ReadRecord()
|
|
// until no more full records are left, whereafter ReadRecord() should return
|
|
// false to indicate that it cannot read any further.
|
|
|
|
Write("foo");
|
|
Write("bar");
|
|
UnmarkEOF();
|
|
ASSERT_EQ("foo", Read());
|
|
ASSERT_TRUE(IsEOF());
|
|
Write("xxx");
|
|
ForceError(0);
|
|
UnmarkEOF();
|
|
ASSERT_EQ("bar", Read());
|
|
ASSERT_EQ("EOF", Read());
|
|
}
|
|
|
|
TEST_P(LogTest, ClearEofError2) {
|
|
Write("foo");
|
|
Write("bar");
|
|
UnmarkEOF();
|
|
ASSERT_EQ("foo", Read());
|
|
Write("xxx");
|
|
ForceError(3);
|
|
UnmarkEOF();
|
|
ASSERT_EQ("bar", Read());
|
|
ASSERT_EQ("EOF", Read());
|
|
ASSERT_EQ(3U, DroppedBytes());
|
|
ASSERT_EQ("OK", MatchError("read error"));
|
|
}
|
|
|
|
TEST_P(LogTest, Recycle) {
|
|
bool recyclable_log = (std::get<0>(GetParam()) != 0);
|
|
if (!recyclable_log) {
|
|
return; // test is only valid for recycled logs
|
|
}
|
|
Write("foo");
|
|
Write("bar");
|
|
Write("baz");
|
|
Write("bif");
|
|
Write("blitz");
|
|
while (get_reader_contents()->size() < log::kBlockSize * 2) {
|
|
Write("xxxxxxxxxxxxxxxx");
|
|
}
|
|
std::unique_ptr<WritableFileWriter> dest_holder(test::GetWritableFileWriter(
|
|
new test::OverwritingStringSink(get_reader_contents()),
|
|
"" /* don't care */));
|
|
Writer recycle_writer(std::move(dest_holder), 123, true);
|
|
recycle_writer.AddRecord(Slice("foooo"));
|
|
recycle_writer.AddRecord(Slice("bar"));
|
|
ASSERT_GE(get_reader_contents()->size(), log::kBlockSize * 2);
|
|
ASSERT_EQ("foooo", Read());
|
|
ASSERT_EQ("bar", Read());
|
|
ASSERT_EQ("EOF", Read());
|
|
}
|
|
|
|
INSTANTIATE_TEST_CASE_P(bool, LogTest,
|
|
::testing::Values(std::make_tuple(0, false),
|
|
std::make_tuple(0, true),
|
|
std::make_tuple(1, false),
|
|
std::make_tuple(1, true)));
|
|
|
|
class RetriableLogTest : public ::testing::TestWithParam<int> {
|
|
private:
|
|
class ReportCollector : public Reader::Reporter {
|
|
public:
|
|
size_t dropped_bytes_;
|
|
std::string message_;
|
|
|
|
ReportCollector() : dropped_bytes_(0) {}
|
|
void Corruption(size_t bytes, const Status& status) override {
|
|
dropped_bytes_ += bytes;
|
|
message_.append(status.ToString());
|
|
}
|
|
};
|
|
|
|
Slice contents_;
|
|
std::unique_ptr<WritableFileWriter> dest_holder_;
|
|
std::unique_ptr<Writer> log_writer_;
|
|
Env* env_;
|
|
EnvOptions env_options_;
|
|
const std::string test_dir_;
|
|
const std::string log_file_;
|
|
std::unique_ptr<WritableFileWriter> writer_;
|
|
std::unique_ptr<SequentialFileReader> reader_;
|
|
ReportCollector report_;
|
|
std::unique_ptr<FragmentBufferedReader> log_reader_;
|
|
|
|
public:
|
|
RetriableLogTest()
|
|
: contents_(),
|
|
dest_holder_(nullptr),
|
|
log_writer_(nullptr),
|
|
env_(Env::Default()),
|
|
test_dir_(test::PerThreadDBPath("retriable_log_test")),
|
|
log_file_(test_dir_ + "/log"),
|
|
writer_(nullptr),
|
|
reader_(nullptr),
|
|
log_reader_(nullptr) {}
|
|
|
|
Status SetupTestEnv() {
|
|
dest_holder_.reset(test::GetWritableFileWriter(
|
|
new test::StringSink(&contents_), "" /* file name */));
|
|
assert(dest_holder_ != nullptr);
|
|
log_writer_.reset(new Writer(std::move(dest_holder_), 123, GetParam()));
|
|
assert(log_writer_ != nullptr);
|
|
|
|
Status s;
|
|
s = env_->CreateDirIfMissing(test_dir_);
|
|
std::unique_ptr<WritableFile> writable_file;
|
|
if (s.ok()) {
|
|
s = env_->NewWritableFile(log_file_, &writable_file, env_options_);
|
|
}
|
|
if (s.ok()) {
|
|
writer_.reset(new WritableFileWriter(
|
|
NewLegacyWritableFileWrapper(std::move(writable_file)), log_file_,
|
|
env_options_));
|
|
assert(writer_ != nullptr);
|
|
}
|
|
std::unique_ptr<SequentialFile> seq_file;
|
|
if (s.ok()) {
|
|
s = env_->NewSequentialFile(log_file_, &seq_file, env_options_);
|
|
}
|
|
if (s.ok()) {
|
|
reader_.reset(new SequentialFileReader(
|
|
NewLegacySequentialFileWrapper(seq_file), log_file_));
|
|
assert(reader_ != nullptr);
|
|
log_reader_.reset(new FragmentBufferedReader(
|
|
nullptr, std::move(reader_), &report_, true /* checksum */,
|
|
123 /* log_number */));
|
|
assert(log_reader_ != nullptr);
|
|
}
|
|
return s;
|
|
}
|
|
|
|
std::string contents() {
|
|
auto file = test::GetStringSinkFromLegacyWriter(log_writer_->file());
|
|
assert(file != nullptr);
|
|
return file->contents_;
|
|
}
|
|
|
|
void Encode(const std::string& msg) { log_writer_->AddRecord(Slice(msg)); }
|
|
|
|
void Write(const Slice& data) {
|
|
writer_->Append(data);
|
|
writer_->Sync(true);
|
|
}
|
|
|
|
bool TryRead(std::string* result) {
|
|
assert(result != nullptr);
|
|
result->clear();
|
|
std::string scratch;
|
|
Slice record;
|
|
bool r = log_reader_->ReadRecord(&record, &scratch);
|
|
if (r) {
|
|
result->assign(record.data(), record.size());
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
};
|
|
|
|
TEST_P(RetriableLogTest, TailLog_PartialHeader) {
|
|
ASSERT_OK(SetupTestEnv());
|
|
std::vector<int> remaining_bytes_in_last_record;
|
|
size_t header_size = GetParam() ? kRecyclableHeaderSize : kHeaderSize;
|
|
bool eof = false;
|
|
SyncPoint::GetInstance()->DisableProcessing();
|
|
SyncPoint::GetInstance()->LoadDependency(
|
|
{{"RetriableLogTest::TailLog:AfterPart1",
|
|
"RetriableLogTest::TailLog:BeforeReadRecord"},
|
|
{"FragmentBufferedLogReader::TryReadMore:FirstEOF",
|
|
"RetriableLogTest::TailLog:BeforePart2"}});
|
|
SyncPoint::GetInstance()->ClearAllCallBacks();
|
|
SyncPoint::GetInstance()->SetCallBack(
|
|
"FragmentBufferedLogReader::TryReadMore:FirstEOF",
|
|
[&](void* /*arg*/) { eof = true; });
|
|
SyncPoint::GetInstance()->EnableProcessing();
|
|
|
|
size_t delta = header_size - 1;
|
|
port::Thread log_writer_thread([&]() {
|
|
size_t old_sz = contents().size();
|
|
Encode("foo");
|
|
size_t new_sz = contents().size();
|
|
std::string part1 = contents().substr(old_sz, delta);
|
|
std::string part2 =
|
|
contents().substr(old_sz + delta, new_sz - old_sz - delta);
|
|
Write(Slice(part1));
|
|
TEST_SYNC_POINT("RetriableLogTest::TailLog:AfterPart1");
|
|
TEST_SYNC_POINT("RetriableLogTest::TailLog:BeforePart2");
|
|
Write(Slice(part2));
|
|
});
|
|
|
|
std::string record;
|
|
port::Thread log_reader_thread([&]() {
|
|
TEST_SYNC_POINT("RetriableLogTest::TailLog:BeforeReadRecord");
|
|
while (!TryRead(&record)) {
|
|
}
|
|
});
|
|
log_reader_thread.join();
|
|
log_writer_thread.join();
|
|
ASSERT_EQ("foo", record);
|
|
ASSERT_TRUE(eof);
|
|
}
|
|
|
|
TEST_P(RetriableLogTest, TailLog_FullHeader) {
|
|
ASSERT_OK(SetupTestEnv());
|
|
std::vector<int> remaining_bytes_in_last_record;
|
|
size_t header_size = GetParam() ? kRecyclableHeaderSize : kHeaderSize;
|
|
bool eof = false;
|
|
SyncPoint::GetInstance()->DisableProcessing();
|
|
SyncPoint::GetInstance()->LoadDependency(
|
|
{{"RetriableLogTest::TailLog:AfterPart1",
|
|
"RetriableLogTest::TailLog:BeforeReadRecord"},
|
|
{"FragmentBufferedLogReader::TryReadMore:FirstEOF",
|
|
"RetriableLogTest::TailLog:BeforePart2"}});
|
|
SyncPoint::GetInstance()->ClearAllCallBacks();
|
|
SyncPoint::GetInstance()->SetCallBack(
|
|
"FragmentBufferedLogReader::TryReadMore:FirstEOF",
|
|
[&](void* /*arg*/) { eof = true; });
|
|
SyncPoint::GetInstance()->EnableProcessing();
|
|
|
|
size_t delta = header_size + 1;
|
|
port::Thread log_writer_thread([&]() {
|
|
size_t old_sz = contents().size();
|
|
Encode("foo");
|
|
size_t new_sz = contents().size();
|
|
std::string part1 = contents().substr(old_sz, delta);
|
|
std::string part2 =
|
|
contents().substr(old_sz + delta, new_sz - old_sz - delta);
|
|
Write(Slice(part1));
|
|
TEST_SYNC_POINT("RetriableLogTest::TailLog:AfterPart1");
|
|
TEST_SYNC_POINT("RetriableLogTest::TailLog:BeforePart2");
|
|
Write(Slice(part2));
|
|
ASSERT_TRUE(eof);
|
|
});
|
|
|
|
std::string record;
|
|
port::Thread log_reader_thread([&]() {
|
|
TEST_SYNC_POINT("RetriableLogTest::TailLog:BeforeReadRecord");
|
|
while (!TryRead(&record)) {
|
|
}
|
|
});
|
|
log_reader_thread.join();
|
|
log_writer_thread.join();
|
|
ASSERT_EQ("foo", record);
|
|
}
|
|
|
|
TEST_P(RetriableLogTest, NonBlockingReadFullRecord) {
|
|
// Clear all sync point callbacks even if this test does not use sync point.
|
|
// It is necessary, otherwise the execute of this test may hit a sync point
|
|
// with which a callback is registered. The registered callback may access
|
|
// some dead variable, causing segfault.
|
|
SyncPoint::GetInstance()->DisableProcessing();
|
|
SyncPoint::GetInstance()->ClearAllCallBacks();
|
|
ASSERT_OK(SetupTestEnv());
|
|
size_t header_size = GetParam() ? kRecyclableHeaderSize : kHeaderSize;
|
|
size_t delta = header_size - 1;
|
|
size_t old_sz = contents().size();
|
|
Encode("foo-bar");
|
|
size_t new_sz = contents().size();
|
|
std::string part1 = contents().substr(old_sz, delta);
|
|
std::string part2 =
|
|
contents().substr(old_sz + delta, new_sz - old_sz - delta);
|
|
Write(Slice(part1));
|
|
std::string record;
|
|
ASSERT_FALSE(TryRead(&record));
|
|
ASSERT_TRUE(record.empty());
|
|
Write(Slice(part2));
|
|
ASSERT_TRUE(TryRead(&record));
|
|
ASSERT_EQ("foo-bar", record);
|
|
}
|
|
|
|
INSTANTIATE_TEST_CASE_P(bool, RetriableLogTest, ::testing::Values(0, 2));
|
|
|
|
} // namespace log
|
|
} // namespace ROCKSDB_NAMESPACE
|
|
|
|
int main(int argc, char** argv) {
|
|
::testing::InitGoogleTest(&argc, argv);
|
|
return RUN_ALL_TESTS();
|
|
}
|
|
|