diff options
| -rw-r--r-- | src/wallet/db.cpp | 39 | ||||
| -rw-r--r-- | src/wallet/db.h | 34 | ||||
| -rw-r--r-- | src/wallet/wallet.cpp | 3 |
3 files changed, 43 insertions, 33 deletions
diff --git a/src/wallet/db.cpp b/src/wallet/db.cpp index 2d841ff8fd..624b4c609b 100644 --- a/src/wallet/db.cpp +++ b/src/wallet/db.cpp @@ -48,7 +48,7 @@ void CheckUniqueFileid(const BerkeleyEnvironment& env, const std::string& filena } CCriticalSection cs_db; -std::map<std::string, BerkeleyEnvironment> g_dbenvs GUARDED_BY(cs_db); //!< Map from directory name to open db environment. +std::map<std::string, std::weak_ptr<BerkeleyEnvironment>> g_dbenvs GUARDED_BY(cs_db); //!< Map from directory name to db environment. } // namespace bool WalletDatabaseFileId::operator==(const WalletDatabaseFileId& rhs) const @@ -80,19 +80,22 @@ bool IsWalletLoaded(const fs::path& wallet_path) LOCK(cs_db); auto env = g_dbenvs.find(env_directory.string()); if (env == g_dbenvs.end()) return false; - return env->second.IsDatabaseLoaded(database_filename); + auto database = env->second.lock(); + return database && database->IsDatabaseLoaded(database_filename); } -BerkeleyEnvironment* GetWalletEnv(const fs::path& wallet_path, std::string& database_filename) +std::shared_ptr<BerkeleyEnvironment> GetWalletEnv(const fs::path& wallet_path, std::string& database_filename) { fs::path env_directory; SplitWalletPath(wallet_path, env_directory, database_filename); LOCK(cs_db); - // Note: An ununsed temporary BerkeleyEnvironment object may be created inside the - // emplace function if the key already exists. This is a little inefficient, - // but not a big concern since the map will be changed in the future to hold - // pointers instead of objects, anyway. - return &g_dbenvs.emplace(std::piecewise_construct, std::forward_as_tuple(env_directory.string()), std::forward_as_tuple(env_directory)).first->second; + auto inserted = g_dbenvs.emplace(env_directory.string(), std::weak_ptr<BerkeleyEnvironment>()); + if (inserted.second) { + auto env = std::make_shared<BerkeleyEnvironment>(env_directory.string()); + inserted.first->second = env; + return env; + } + return inserted.first->second.lock(); } // @@ -137,6 +140,7 @@ BerkeleyEnvironment::BerkeleyEnvironment(const fs::path& dir_path) : strPath(dir BerkeleyEnvironment::~BerkeleyEnvironment() { + g_dbenvs.erase(strPath); Close(); } @@ -214,10 +218,9 @@ bool BerkeleyEnvironment::Open(bool retry) return true; } -void BerkeleyEnvironment::MakeMock() +BerkeleyEnvironment::BerkeleyEnvironment() { - if (fDbEnvInit) - throw std::runtime_error("BerkeleyEnvironment::MakeMock: Already initialized"); + Reset(); boost::this_thread::interruption_point(); @@ -266,7 +269,7 @@ BerkeleyEnvironment::VerifyResult BerkeleyEnvironment::Verify(const std::string& bool BerkeleyBatch::Recover(const fs::path& file_path, void *callbackDataIn, bool (*recoverKVcallback)(void* callbackData, CDataStream ssKey, CDataStream ssValue), std::string& newFilename) { std::string filename; - BerkeleyEnvironment* env = GetWalletEnv(file_path, filename); + std::shared_ptr<BerkeleyEnvironment> env = GetWalletEnv(file_path, filename); // Recovery procedure: // move wallet file to walletfilename.timestamp.bak @@ -335,7 +338,7 @@ bool BerkeleyBatch::Recover(const fs::path& file_path, void *callbackDataIn, boo bool BerkeleyBatch::VerifyEnvironment(const fs::path& file_path, std::string& errorStr) { std::string walletFile; - BerkeleyEnvironment* env = GetWalletEnv(file_path, walletFile); + std::shared_ptr<BerkeleyEnvironment> env = GetWalletEnv(file_path, walletFile); fs::path walletDir = env->Directory(); LogPrintf("Using BerkeleyDB version %s\n", DbEnv::version(0, 0, 0)); @@ -359,7 +362,7 @@ bool BerkeleyBatch::VerifyEnvironment(const fs::path& file_path, std::string& er bool BerkeleyBatch::VerifyDatabaseFile(const fs::path& file_path, std::string& warningStr, std::string& errorStr, BerkeleyEnvironment::recoverFunc_type recoverFunc) { std::string walletFile; - BerkeleyEnvironment* env = GetWalletEnv(file_path, walletFile); + std::shared_ptr<BerkeleyEnvironment> env = GetWalletEnv(file_path, walletFile); fs::path walletDir = env->Directory(); if (fs::exists(walletDir / walletFile)) @@ -463,7 +466,7 @@ BerkeleyBatch::BerkeleyBatch(BerkeleyDatabase& database, const char* pszMode, bo { fReadOnly = (!strchr(pszMode, '+') && !strchr(pszMode, 'w')); fFlushOnClose = fFlushOnCloseIn; - env = database.env; + env = database.env.get(); if (database.IsDummy()) { return; } @@ -520,7 +523,7 @@ BerkeleyBatch::BerkeleyBatch(BerkeleyDatabase& database, const char* pszMode, bo // versions of BDB have an set_lk_exclusive method for this // purpose, but the older version we use does not.) for (auto& env : g_dbenvs) { - CheckUniqueFileid(env.second, strFilename, *pdb_temp, this->env->m_fileids[strFilename]); + CheckUniqueFileid(*env.second.lock().get(), strFilename, *pdb_temp, this->env->m_fileids[strFilename]); } pdb = pdb_temp.release(); @@ -621,7 +624,7 @@ bool BerkeleyBatch::Rewrite(BerkeleyDatabase& database, const char* pszSkip) if (database.IsDummy()) { return true; } - BerkeleyEnvironment *env = database.env; + BerkeleyEnvironment *env = database.env.get(); const std::string& strFile = database.strFile; while (true) { { @@ -752,7 +755,7 @@ bool BerkeleyBatch::PeriodicFlush(BerkeleyDatabase& database) return true; } bool ret = false; - BerkeleyEnvironment *env = database.env; + BerkeleyEnvironment *env = database.env.get(); const std::string& strFile = database.strFile; TRY_LOCK(cs_db, lockDb); if (lockDb) diff --git a/src/wallet/db.h b/src/wallet/db.h index 6af37c12cd..ac70dc55e1 100644 --- a/src/wallet/db.h +++ b/src/wallet/db.h @@ -50,10 +50,10 @@ public: std::condition_variable_any m_db_in_use; BerkeleyEnvironment(const fs::path& env_directory); + BerkeleyEnvironment(); ~BerkeleyEnvironment(); void Reset(); - void MakeMock(); bool IsMock() const { return fMockDb; } bool IsInitialized() const { return fDbEnvInit; } bool IsDatabaseLoaded(const std::string& db_filename) const { return m_databases.find(db_filename) != m_databases.end(); } @@ -102,7 +102,7 @@ public: bool IsWalletLoaded(const fs::path& wallet_path); /** Get BerkeleyEnvironment and database filename given a wallet path. */ -BerkeleyEnvironment* GetWalletEnv(const fs::path& wallet_path, std::string& database_filename); +std::shared_ptr<BerkeleyEnvironment> GetWalletEnv(const fs::path& wallet_path, std::string& database_filename); /** An instance of this class represents one database. * For BerkeleyDB this is just a (env, strFile) tuple. @@ -117,17 +117,11 @@ public: } /** Create DB handle to real database */ - BerkeleyDatabase(const fs::path& wallet_path, bool mock = false) : - nUpdateCounter(0), nLastSeen(0), nLastFlushed(0), nLastWalletUpdate(0) + BerkeleyDatabase(std::shared_ptr<BerkeleyEnvironment> env, std::string filename) : + nUpdateCounter(0), nLastSeen(0), nLastFlushed(0), nLastWalletUpdate(0), env(std::move(env)), strFile(std::move(filename)) { - env = GetWalletEnv(wallet_path, strFile); - auto inserted = env->m_databases.emplace(strFile, std::ref(*this)); + auto inserted = this->env->m_databases.emplace(strFile, std::ref(*this)); assert(inserted.second); - if (mock) { - env->Close(); - env->Reset(); - env->MakeMock(); - } } ~BerkeleyDatabase() { @@ -140,7 +134,8 @@ public: /** Return object for accessing database at specified path. */ static std::unique_ptr<BerkeleyDatabase> Create(const fs::path& path) { - return MakeUnique<BerkeleyDatabase>(path); + std::string filename; + return MakeUnique<BerkeleyDatabase>(GetWalletEnv(path, filename), std::move(filename)); } /** Return object for accessing dummy database with no read/write capabilities. */ @@ -152,7 +147,7 @@ public: /** Return object for accessing temporary in-memory database. */ static std::unique_ptr<BerkeleyDatabase> CreateMock() { - return MakeUnique<BerkeleyDatabase>("", true /* mock */); + return MakeUnique<BerkeleyDatabase>(std::make_shared<BerkeleyEnvironment>(), ""); } /** Rewrite the entire database on disk, with the exception of key pszSkip if non-zero @@ -176,12 +171,21 @@ public: unsigned int nLastFlushed; int64_t nLastWalletUpdate; + /** + * Pointer to shared database environment. + * + * Normally there is only one BerkeleyDatabase object per + * BerkeleyEnvivonment, but in the special, backwards compatible case where + * multiple wallet BDB data files are loaded from the same directory, this + * will point to a shared instance that gets freed when the last data file + * is closed. + */ + std::shared_ptr<BerkeleyEnvironment> env; + /** Database pointer. This is initialized lazily and reset during flushes, so it can be null. */ std::unique_ptr<Db> m_db; private: - /** BerkeleyDB specific */ - BerkeleyEnvironment *env; std::string strFile; /** Return whether this database handle is a dummy for testing. diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp index e9fff5443b..8d52f7eeca 100644 --- a/src/wallet/wallet.cpp +++ b/src/wallet/wallet.cpp @@ -4037,6 +4037,9 @@ bool CWallet::Verify(const WalletLocation& location, bool salvage_wallet, std::s return false; } + // Keep same database environment instance across Verify/Recover calls below. + std::unique_ptr<WalletDatabase> database = WalletDatabase::Create(wallet_path); + try { if (!WalletBatch::VerifyEnvironment(wallet_path, error_string)) { return false; |