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+// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
+// This source code is licensed under both the GPLv2 (found in the
+// COPYING file in the root directory) and Apache 2.0 License
+// (found in the LICENSE.Apache file in the root directory).
+//
+// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file. See the AUTHORS file for names of contributors.
+
+#include "util/testutil.h"
+
+#include <cctype>
+#include <sstream>
+
+#include "db/memtable_list.h"
+#include "port/port.h"
+#include "util/file_reader_writer.h"
+
+namespace rocksdb {
+namespace test {
+
+const uint32_t kDefaultFormatVersion = BlockBasedTableOptions().format_version;
+const uint32_t kLatestFormatVersion = 4u;
+
+Slice RandomString(Random* rnd, int len, std::string* dst) {
+ dst->resize(len);
+ for (int i = 0; i < len; i++) {
+ (*dst)[i] = static_cast<char>(' ' + rnd->Uniform(95)); // ' ' .. '~'
+ }
+ return Slice(*dst);
+}
+
+extern std::string RandomHumanReadableString(Random* rnd, int len) {
+ std::string ret;
+ ret.resize(len);
+ for (int i = 0; i < len; ++i) {
+ ret[i] = static_cast<char>('a' + rnd->Uniform(26));
+ }
+ return ret;
+}
+
+std::string RandomKey(Random* rnd, int len, RandomKeyType type) {
+ // Make sure to generate a wide variety of characters so we
+ // test the boundary conditions for short-key optimizations.
+ static const char kTestChars[] = {'\0', '\1', 'a', 'b', 'c',
+ 'd', 'e', '\xfd', '\xfe', '\xff'};
+ std::string result;
+ for (int i = 0; i < len; i++) {
+ std::size_t indx = 0;
+ switch (type) {
+ case RandomKeyType::RANDOM:
+ indx = rnd->Uniform(sizeof(kTestChars));
+ break;
+ case RandomKeyType::LARGEST:
+ indx = sizeof(kTestChars) - 1;
+ break;
+ case RandomKeyType::MIDDLE:
+ indx = sizeof(kTestChars) / 2;
+ break;
+ case RandomKeyType::SMALLEST:
+ indx = 0;
+ break;
+ }
+ result += kTestChars[indx];
+ }
+ return result;
+}
+
+extern Slice CompressibleString(Random* rnd, double compressed_fraction,
+ int len, std::string* dst) {
+ int raw = static_cast<int>(len * compressed_fraction);
+ if (raw < 1) raw = 1;
+ std::string raw_data;
+ RandomString(rnd, raw, &raw_data);
+
+ // Duplicate the random data until we have filled "len" bytes
+ dst->clear();
+ while (dst->size() < (unsigned int)len) {
+ dst->append(raw_data);
+ }
+ dst->resize(len);
+ return Slice(*dst);
+}
+
+namespace {
+class Uint64ComparatorImpl : public Comparator {
+ public:
+ Uint64ComparatorImpl() {}
+
+ const char* Name() const override { return "rocksdb.Uint64Comparator"; }
+
+ int Compare(const Slice& a, const Slice& b) const override {
+ assert(a.size() == sizeof(uint64_t) && b.size() == sizeof(uint64_t));
+ const uint64_t* left = reinterpret_cast<const uint64_t*>(a.data());
+ const uint64_t* right = reinterpret_cast<const uint64_t*>(b.data());
+ uint64_t leftValue;
+ uint64_t rightValue;
+ GetUnaligned(left, &leftValue);
+ GetUnaligned(right, &rightValue);
+ if (leftValue == rightValue) {
+ return 0;
+ } else if (leftValue < rightValue) {
+ return -1;
+ } else {
+ return 1;
+ }
+ }
+
+ void FindShortestSeparator(std::string* /*start*/,
+ const Slice& /*limit*/) const override {
+ return;
+ }
+
+ void FindShortSuccessor(std::string* /*key*/) const override { return; }
+};
+} // namespace
+
+const Comparator* Uint64Comparator() {
+ static Uint64ComparatorImpl uint64comp;
+ return &uint64comp;
+}
+
+WritableFileWriter* GetWritableFileWriter(WritableFile* wf,
+ const std::string& fname) {
+ std::unique_ptr<WritableFile> file(wf);
+ return new WritableFileWriter(std::move(file), fname, EnvOptions());
+}
+
+RandomAccessFileReader* GetRandomAccessFileReader(RandomAccessFile* raf) {
+ std::unique_ptr<RandomAccessFile> file(raf);
+ return new RandomAccessFileReader(std::move(file),
+ "[test RandomAccessFileReader]");
+}
+
+SequentialFileReader* GetSequentialFileReader(SequentialFile* se,
+ const std::string& fname) {
+ std::unique_ptr<SequentialFile> file(se);
+ return new SequentialFileReader(std::move(file), fname);
+}
+
+void CorruptKeyType(InternalKey* ikey) {
+ std::string keystr = ikey->Encode().ToString();
+ keystr[keystr.size() - 8] = kTypeLogData;
+ ikey->DecodeFrom(Slice(keystr.data(), keystr.size()));
+}
+
+std::string KeyStr(const std::string& user_key, const SequenceNumber& seq,
+ const ValueType& t, bool corrupt) {
+ InternalKey k(user_key, seq, t);
+ if (corrupt) {
+ CorruptKeyType(&k);
+ }
+ return k.Encode().ToString();
+}
+
+std::string RandomName(Random* rnd, const size_t len) {
+ std::stringstream ss;
+ for (size_t i = 0; i < len; ++i) {
+ ss << static_cast<char>(rnd->Uniform(26) + 'a');
+ }
+ return ss.str();
+}
+
+CompressionType RandomCompressionType(Random* rnd) {
+ return static_cast<CompressionType>(rnd->Uniform(6));
+}
+
+void RandomCompressionTypeVector(const size_t count,
+ std::vector<CompressionType>* types,
+ Random* rnd) {
+ types->clear();
+ for (size_t i = 0; i < count; ++i) {
+ types->emplace_back(RandomCompressionType(rnd));
+ }
+}
+
+const SliceTransform* RandomSliceTransform(Random* rnd, int pre_defined) {
+ int random_num = pre_defined >= 0 ? pre_defined : rnd->Uniform(4);
+ switch (random_num) {
+ case 0:
+ return NewFixedPrefixTransform(rnd->Uniform(20) + 1);
+ case 1:
+ return NewCappedPrefixTransform(rnd->Uniform(20) + 1);
+ case 2:
+ return NewNoopTransform();
+ default:
+ return nullptr;
+ }
+}
+
+BlockBasedTableOptions RandomBlockBasedTableOptions(Random* rnd) {
+ BlockBasedTableOptions opt;
+ opt.cache_index_and_filter_blocks = rnd->Uniform(2);
+ opt.pin_l0_filter_and_index_blocks_in_cache = rnd->Uniform(2);
+ opt.pin_top_level_index_and_filter = rnd->Uniform(2);
+ opt.index_type = rnd->Uniform(2) ? BlockBasedTableOptions::kBinarySearch
+ : BlockBasedTableOptions::kHashSearch;
+ opt.hash_index_allow_collision = rnd->Uniform(2);
+ opt.checksum = static_cast<ChecksumType>(rnd->Uniform(3));
+ opt.block_size = rnd->Uniform(10000000);
+ opt.block_size_deviation = rnd->Uniform(100);
+ opt.block_restart_interval = rnd->Uniform(100);
+ opt.index_block_restart_interval = rnd->Uniform(100);
+ opt.whole_key_filtering = rnd->Uniform(2);
+
+ return opt;
+}
+
+TableFactory* RandomTableFactory(Random* rnd, int pre_defined) {
+#ifndef ROCKSDB_LITE
+ int random_num = pre_defined >= 0 ? pre_defined : rnd->Uniform(4);
+ switch (random_num) {
+ case 0:
+ return NewPlainTableFactory();
+ case 1:
+ return NewCuckooTableFactory();
+ default:
+ return NewBlockBasedTableFactory();
+ }
+#else
+ (void)rnd;
+ (void)pre_defined;
+ return NewBlockBasedTableFactory();
+#endif // !ROCKSDB_LITE
+}
+
+MergeOperator* RandomMergeOperator(Random* rnd) {
+ return new ChanglingMergeOperator(RandomName(rnd, 10));
+}
+
+CompactionFilter* RandomCompactionFilter(Random* rnd) {
+ return new ChanglingCompactionFilter(RandomName(rnd, 10));
+}
+
+CompactionFilterFactory* RandomCompactionFilterFactory(Random* rnd) {
+ return new ChanglingCompactionFilterFactory(RandomName(rnd, 10));
+}
+
+void RandomInitDBOptions(DBOptions* db_opt, Random* rnd) {
+ // boolean options
+ db_opt->advise_random_on_open = rnd->Uniform(2);
+ db_opt->allow_mmap_reads = rnd->Uniform(2);
+ db_opt->allow_mmap_writes = rnd->Uniform(2);
+ db_opt->use_direct_reads = rnd->Uniform(2);
+ db_opt->use_direct_io_for_flush_and_compaction = rnd->Uniform(2);
+ db_opt->create_if_missing = rnd->Uniform(2);
+ db_opt->create_missing_column_families = rnd->Uniform(2);
+ db_opt->enable_thread_tracking = rnd->Uniform(2);
+ db_opt->error_if_exists = rnd->Uniform(2);
+ db_opt->is_fd_close_on_exec = rnd->Uniform(2);
+ db_opt->paranoid_checks = rnd->Uniform(2);
+ db_opt->skip_log_error_on_recovery = rnd->Uniform(2);
+ db_opt->skip_stats_update_on_db_open = rnd->Uniform(2);
+ db_opt->use_adaptive_mutex = rnd->Uniform(2);
+ db_opt->use_fsync = rnd->Uniform(2);
+ db_opt->recycle_log_file_num = rnd->Uniform(2);
+ db_opt->avoid_flush_during_recovery = rnd->Uniform(2);
+ db_opt->avoid_flush_during_shutdown = rnd->Uniform(2);
+
+ // int options
+ db_opt->max_background_compactions = rnd->Uniform(100);
+ db_opt->max_background_flushes = rnd->Uniform(100);
+ db_opt->max_file_opening_threads = rnd->Uniform(100);
+ db_opt->max_open_files = rnd->Uniform(100);
+ db_opt->table_cache_numshardbits = rnd->Uniform(100);
+
+ // size_t options
+ db_opt->db_write_buffer_size = rnd->Uniform(10000);
+ db_opt->keep_log_file_num = rnd->Uniform(10000);
+ db_opt->log_file_time_to_roll = rnd->Uniform(10000);
+ db_opt->manifest_preallocation_size = rnd->Uniform(10000);
+ db_opt->max_log_file_size = rnd->Uniform(10000);
+
+ // std::string options
+ db_opt->db_log_dir = "path/to/db_log_dir";
+ db_opt->wal_dir = "path/to/wal_dir";
+
+ // uint32_t options
+ db_opt->max_subcompactions = rnd->Uniform(100000);
+
+ // uint64_t options
+ static const uint64_t uint_max = static_cast<uint64_t>(UINT_MAX);
+ db_opt->WAL_size_limit_MB = uint_max + rnd->Uniform(100000);
+ db_opt->WAL_ttl_seconds = uint_max + rnd->Uniform(100000);
+ db_opt->bytes_per_sync = uint_max + rnd->Uniform(100000);
+ db_opt->delayed_write_rate = uint_max + rnd->Uniform(100000);
+ db_opt->delete_obsolete_files_period_micros = uint_max + rnd->Uniform(100000);
+ db_opt->max_manifest_file_size = uint_max + rnd->Uniform(100000);
+ db_opt->max_total_wal_size = uint_max + rnd->Uniform(100000);
+ db_opt->wal_bytes_per_sync = uint_max + rnd->Uniform(100000);
+
+ // unsigned int options
+ db_opt->stats_dump_period_sec = rnd->Uniform(100000);
+}
+
+void RandomInitCFOptions(ColumnFamilyOptions* cf_opt, Random* rnd) {
+ cf_opt->compaction_style = (CompactionStyle)(rnd->Uniform(4));
+
+ // boolean options
+ cf_opt->report_bg_io_stats = rnd->Uniform(2);
+ cf_opt->disable_auto_compactions = rnd->Uniform(2);
+ cf_opt->inplace_update_support = rnd->Uniform(2);
+ cf_opt->level_compaction_dynamic_level_bytes = rnd->Uniform(2);
+ cf_opt->optimize_filters_for_hits = rnd->Uniform(2);
+ cf_opt->paranoid_file_checks = rnd->Uniform(2);
+ cf_opt->purge_redundant_kvs_while_flush = rnd->Uniform(2);
+ cf_opt->force_consistency_checks = rnd->Uniform(2);
+ cf_opt->compaction_options_fifo.allow_compaction = rnd->Uniform(2);
+ cf_opt->memtable_whole_key_filtering = rnd->Uniform(2);
+
+ // double options
+ cf_opt->hard_rate_limit = static_cast<double>(rnd->Uniform(10000)) / 13;
+ cf_opt->soft_rate_limit = static_cast<double>(rnd->Uniform(10000)) / 13;
+ cf_opt->memtable_prefix_bloom_size_ratio =
+ static_cast<double>(rnd->Uniform(10000)) / 20000.0;
+
+ // int options
+ cf_opt->level0_file_num_compaction_trigger = rnd->Uniform(100);
+ cf_opt->level0_slowdown_writes_trigger = rnd->Uniform(100);
+ cf_opt->level0_stop_writes_trigger = rnd->Uniform(100);
+ cf_opt->max_bytes_for_level_multiplier = rnd->Uniform(100);
+ cf_opt->max_mem_compaction_level = rnd->Uniform(100);
+ cf_opt->max_write_buffer_number = rnd->Uniform(100);
+ cf_opt->max_write_buffer_number_to_maintain = rnd->Uniform(100);
+ cf_opt->min_write_buffer_number_to_merge = rnd->Uniform(100);
+ cf_opt->num_levels = rnd->Uniform(100);
+ cf_opt->target_file_size_multiplier = rnd->Uniform(100);
+
+ // vector int options
+ cf_opt->max_bytes_for_level_multiplier_additional.resize(cf_opt->num_levels);
+ for (int i = 0; i < cf_opt->num_levels; i++) {
+ cf_opt->max_bytes_for_level_multiplier_additional[i] = rnd->Uniform(100);
+ }
+
+ // size_t options
+ cf_opt->arena_block_size = rnd->Uniform(10000);
+ cf_opt->inplace_update_num_locks = rnd->Uniform(10000);
+ cf_opt->max_successive_merges = rnd->Uniform(10000);
+ cf_opt->memtable_huge_page_size = rnd->Uniform(10000);
+ cf_opt->write_buffer_size = rnd->Uniform(10000);
+
+ // uint32_t options
+ cf_opt->bloom_locality = rnd->Uniform(10000);
+ cf_opt->max_bytes_for_level_base = rnd->Uniform(10000);
+
+ // uint64_t options
+ static const uint64_t uint_max = static_cast<uint64_t>(UINT_MAX);
+ cf_opt->ttl = uint_max + rnd->Uniform(10000);
+ cf_opt->max_sequential_skip_in_iterations = uint_max + rnd->Uniform(10000);
+ cf_opt->target_file_size_base = uint_max + rnd->Uniform(10000);
+ cf_opt->max_compaction_bytes =
+ cf_opt->target_file_size_base * rnd->Uniform(100);
+ cf_opt->compaction_options_fifo.max_table_files_size =
+ uint_max + rnd->Uniform(10000);
+
+ // unsigned int options
+ cf_opt->rate_limit_delay_max_milliseconds = rnd->Uniform(10000);
+
+ // pointer typed options
+ cf_opt->prefix_extractor.reset(RandomSliceTransform(rnd));
+ cf_opt->table_factory.reset(RandomTableFactory(rnd));
+ cf_opt->merge_operator.reset(RandomMergeOperator(rnd));
+ if (cf_opt->compaction_filter) {
+ delete cf_opt->compaction_filter;
+ }
+ cf_opt->compaction_filter = RandomCompactionFilter(rnd);
+ cf_opt->compaction_filter_factory.reset(RandomCompactionFilterFactory(rnd));
+
+ // custom typed options
+ cf_opt->compression = RandomCompressionType(rnd);
+ RandomCompressionTypeVector(cf_opt->num_levels,
+ &cf_opt->compression_per_level, rnd);
+}
+
+Status DestroyDir(Env* env, const std::string& dir) {
+ Status s;
+ if (env->FileExists(dir).IsNotFound()) {
+ return s;
+ }
+ std::vector<std::string> files_in_dir;
+ s = env->GetChildren(dir, &files_in_dir);
+ if (s.ok()) {
+ for (auto& file_in_dir : files_in_dir) {
+ if (file_in_dir == "." || file_in_dir == "..") {
+ continue;
+ }
+ s = env->DeleteFile(dir + "/" + file_in_dir);
+ if (!s.ok()) {
+ break;
+ }
+ }
+ }
+
+ if (s.ok()) {
+ s = env->DeleteDir(dir);
+ }
+ return s;
+}
+
+bool IsDirectIOSupported(Env* env, const std::string& dir) {
+ EnvOptions env_options;
+ env_options.use_mmap_writes = false;
+ env_options.use_direct_writes = true;
+ std::string tmp = TempFileName(dir, 999);
+ Status s;
+ {
+ std::unique_ptr<WritableFile> file;
+ s = env->NewWritableFile(tmp, &file, env_options);
+ }
+ if (s.ok()) {
+ s = env->DeleteFile(tmp);
+ }
+ return s.ok();
+}
+
+} // namespace test
+} // namespace rocksdb
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