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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/390223051): Remove C-library calls to fix the errors.
#pragma allow_unsafe_libc_calls
#endif
#include <stddef.h>
#include <algorithm>
#include <cstring>
#include <string>
#include <tuple>
#include <utility>
#include "base/files/file.h"
#include "base/files/file_path.h"
#include "base/files/scoped_temp_dir.h"
#include "base/functional/callback_helpers.h"
#include "base/memory/scoped_refptr.h"
#include "base/no_destructor.h"
#include "base/test/simple_test_clock.h"
#include "base/test/task_environment.h"
#include "components/services/storage/indexed_db/leveldb/leveldb_state.h"
#include "components/services/storage/indexed_db/locks/partitioned_lock_manager.h"
#include "components/services/storage/indexed_db/scopes/leveldb_scopes.h"
#include "components/services/storage/indexed_db/scopes/leveldb_scopes_test_utils.h"
#include "components/services/storage/indexed_db/transactional_leveldb/leveldb_write_batch.h"
#include "components/services/storage/indexed_db/transactional_leveldb/transactional_leveldb_database.h"
#include "components/services/storage/indexed_db/transactional_leveldb/transactional_leveldb_factory.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/leveldatabase/env_chromium.h"
#include "third_party/leveldatabase/leveldb_chrome.h"
#include "third_party/leveldatabase/src/include/leveldb/comparator.h"
namespace content::indexed_db {
namespace {
static const size_t kDefaultMaxOpenIteratorsPerDatabase = 50;
class SimpleLDBComparator : public leveldb::Comparator {
public:
static const SimpleLDBComparator* Get() {
static const base::NoDestructor<SimpleLDBComparator> simple_ldb_comparator;
return simple_ldb_comparator.get();
}
int Compare(const leveldb::Slice& a, const leveldb::Slice& b) const override {
size_t len = std::min(a.size(), b.size());
return memcmp(a.data(), b.data(), len);
}
const char* Name() const override { return "temp_comparator"; }
void FindShortestSeparator(std::string* start,
const leveldb::Slice& limit) const override {}
void FindShortSuccessor(std::string* key) const override {}
};
class TransactionalLevelDBDatabaseTest : public LevelDBScopesTestBase {
public:
TransactionalLevelDBDatabaseTest() = default;
~TransactionalLevelDBDatabaseTest() override = default;
void TearDown() override {
// Delete the database first to free the internal LevelDBState reference.
transactional_leveldb_database_.reset();
LevelDBScopesTestBase::TearDown();
}
leveldb::Status OpenLevelDBDatabase() {
CHECK(leveldb_);
lock_manager_ = std::make_unique<PartitionedLockManager>();
std::unique_ptr<LevelDBScopes> scopes = std::make_unique<LevelDBScopes>(
std::vector<uint8_t>{'a'}, 1024ul, leveldb_, lock_manager_.get(),
base::DoNothing());
leveldb::Status status = scopes->Initialize();
if (!status.ok())
return status;
scopes->StartRecoveryAndCleanupTasks();
transactional_leveldb_database_ =
transactional_leveldb_factory_.CreateLevelDBDatabase(
leveldb_, std::move(scopes), nullptr,
kDefaultMaxOpenIteratorsPerDatabase);
return leveldb::Status::OK();
}
protected:
DefaultTransactionalLevelDBFactory transactional_leveldb_factory_;
std::unique_ptr<TransactionalLevelDBDatabase> transactional_leveldb_database_;
std::unique_ptr<PartitionedLockManager> lock_manager_;
};
TEST_F(TransactionalLevelDBDatabaseTest, CorruptionTest) {
const std::string key("key");
const std::string value("value");
ASSERT_TRUE(temp_directory_.CreateUniqueTempDir());
std::string put_value;
std::string got_value;
scoped_refptr<LevelDBState> ldb_state;
leveldb::Status status;
status = CreateAndSaveLevelDBState();
EXPECT_TRUE(status.ok());
status = OpenLevelDBDatabase();
EXPECT_TRUE(status.ok());
EXPECT_TRUE(transactional_leveldb_database_);
put_value = value;
status = transactional_leveldb_database_->Put(key, &put_value);
EXPECT_TRUE(status.ok());
transactional_leveldb_database_.reset();
CloseScopesAndDestroyLevelDBState();
status = CreateAndSaveLevelDBState();
EXPECT_TRUE(status.ok());
status = OpenLevelDBDatabase();
EXPECT_TRUE(status.ok());
bool found = false;
status = transactional_leveldb_database_->Get(key, &got_value, &found);
EXPECT_TRUE(status.ok());
EXPECT_TRUE(found);
EXPECT_EQ(value, got_value);
transactional_leveldb_database_.reset();
CloseScopesAndDestroyLevelDBState();
EXPECT_TRUE(leveldb_chrome::CorruptClosedDBForTesting(DatabaseDirFilePath()));
status = CreateAndSaveLevelDBState();
EXPECT_FALSE(status.ok());
EXPECT_TRUE(status.IsCorruption());
status = DestroyDB();
EXPECT_TRUE(status.ok());
status = CreateAndSaveLevelDBState();
EXPECT_TRUE(status.ok());
status = OpenLevelDBDatabase();
EXPECT_TRUE(status.ok());
ASSERT_TRUE(transactional_leveldb_database_);
status = transactional_leveldb_database_->Get(key, &got_value, &found);
EXPECT_TRUE(status.ok());
EXPECT_FALSE(found);
}
TEST(LevelDB, Locking) {
static base::NoDestructor<leveldb_env::ChromiumEnv> gTestEnv;
base::ScopedTempDir temp_directory;
ASSERT_TRUE(temp_directory.CreateUniqueTempDir());
leveldb::Env* env = gTestEnv.get();
base::FilePath file = temp_directory.GetPath().AppendASCII("LOCK");
leveldb::FileLock* lock;
leveldb::Status status = env->LockFile(file.AsUTF8Unsafe(), &lock);
EXPECT_TRUE(status.ok());
status = env->UnlockFile(lock);
EXPECT_TRUE(status.ok());
status = env->LockFile(file.AsUTF8Unsafe(), &lock);
EXPECT_TRUE(status.ok());
leveldb::FileLock* lock2;
status = env->LockFile(file.AsUTF8Unsafe(), &lock2);
EXPECT_FALSE(status.ok());
status = env->UnlockFile(lock);
EXPECT_TRUE(status.ok());
}
} // namespace
} // namespace content::indexed_db
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