LCOV - code coverage report
Current view: top level - src - logging.h (source / functions) Hit Total Coverage
Test: fuzz_coverage.info Lines: 30 49 61.2 %
Date: 2023-11-06 23:13:05 Functions: 23 234 9.8 %
Branches: 20 1178 1.7 %

           Branch data     Line data    Source code
       1                 :            : // Copyright (c) 2009-2010 Satoshi Nakamoto
       2                 :            : // Copyright (c) 2009-2022 The Bitcoin Core developers
       3                 :            : // Distributed under the MIT software license, see the accompanying
       4                 :            : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
       5                 :            : 
       6                 :            : #ifndef BITCOIN_LOGGING_H
       7                 :            : #define BITCOIN_LOGGING_H
       8                 :            : 
       9                 :            : #include <threadsafety.h>
      10                 :            : #include <tinyformat.h>
      11                 :            : #include <util/fs.h>
      12                 :            : #include <util/string.h>
      13                 :            : 
      14                 :            : #include <atomic>
      15                 :            : #include <cstdint>
      16                 :            : #include <functional>
      17                 :            : #include <list>
      18                 :            : #include <mutex>
      19                 :            : #include <string>
      20                 :            : #include <unordered_map>
      21                 :            : #include <vector>
      22                 :            : 
      23                 :            : static const bool DEFAULT_LOGTIMEMICROS = false;
      24                 :            : static const bool DEFAULT_LOGIPS        = false;
      25                 :            : static const bool DEFAULT_LOGTIMESTAMPS = true;
      26                 :            : static const bool DEFAULT_LOGTHREADNAMES = false;
      27                 :            : static const bool DEFAULT_LOGSOURCELOCATIONS = false;
      28                 :            : extern const char * const DEFAULT_DEBUGLOGFILE;
      29                 :            : 
      30                 :            : extern bool fLogIPs;
      31                 :            : 
      32                 :          0 : struct LogCategory {
      33                 :            :     std::string category;
      34                 :            :     bool active;
      35                 :            : };
      36                 :            : 
      37                 :            : namespace BCLog {
      38                 :            :     enum LogFlags : uint32_t {
      39                 :            :         NONE        = 0,
      40                 :            :         NET         = (1 <<  0),
      41                 :            :         TOR         = (1 <<  1),
      42                 :            :         MEMPOOL     = (1 <<  2),
      43                 :            :         HTTP        = (1 <<  3),
      44                 :            :         BENCH       = (1 <<  4),
      45                 :            :         ZMQ         = (1 <<  5),
      46                 :            :         WALLETDB    = (1 <<  6),
      47                 :            :         RPC         = (1 <<  7),
      48                 :            :         ESTIMATEFEE = (1 <<  8),
      49                 :            :         ADDRMAN     = (1 <<  9),
      50                 :            :         SELECTCOINS = (1 << 10),
      51                 :            :         REINDEX     = (1 << 11),
      52                 :            :         CMPCTBLOCK  = (1 << 12),
      53                 :            :         RAND        = (1 << 13),
      54                 :            :         PRUNE       = (1 << 14),
      55                 :            :         PROXY       = (1 << 15),
      56                 :            :         MEMPOOLREJ  = (1 << 16),
      57                 :            :         LIBEVENT    = (1 << 17),
      58                 :            :         COINDB      = (1 << 18),
      59                 :            :         QT          = (1 << 19),
      60                 :            :         LEVELDB     = (1 << 20),
      61                 :            :         VALIDATION  = (1 << 21),
      62                 :            :         I2P         = (1 << 22),
      63                 :            :         IPC         = (1 << 23),
      64                 :            : #ifdef DEBUG_LOCKCONTENTION
      65                 :            :         LOCK        = (1 << 24),
      66                 :            : #endif
      67                 :            :         UTIL        = (1 << 25),
      68                 :            :         BLOCKSTORAGE = (1 << 26),
      69                 :            :         TXRECONCILIATION = (1 << 27),
      70                 :            :         SCAN        = (1 << 28),
      71                 :            :         TXPACKAGES  = (1 << 29),
      72                 :            :         ALL         = ~(uint32_t)0,
      73                 :            :     };
      74                 :            :     enum class Level {
      75                 :            :         Trace = 0, // High-volume or detailed logging for development/debugging
      76                 :            :         Debug,     // Reasonably noisy logging, but still usable in production
      77                 :            :         Info,      // Default
      78                 :            :         Warning,
      79                 :            :         Error,
      80                 :            :         None, // Internal use only
      81                 :            :     };
      82                 :            :     constexpr auto DEFAULT_LOG_LEVEL{Level::Debug};
      83                 :            : 
      84                 :          8 :     class Logger
      85                 :            :     {
      86                 :            :     private:
      87                 :            :         mutable StdMutex m_cs; // Can not use Mutex from sync.h because in debug mode it would cause a deadlock when a potential deadlock was detected
      88                 :            : 
      89                 :          2 :         FILE* m_fileout GUARDED_BY(m_cs) = nullptr;
      90                 :            :         std::list<std::string> m_msgs_before_open GUARDED_BY(m_cs);
      91                 :          2 :         bool m_buffering GUARDED_BY(m_cs) = true; //!< Buffer messages before logging can be started.
      92                 :            : 
      93                 :            :         /**
      94                 :            :          * m_started_new_line is a state variable that will suppress printing of
      95                 :            :          * the timestamp when multiple calls are made that don't end in a
      96                 :            :          * newline.
      97                 :            :          */
      98                 :          2 :         std::atomic_bool m_started_new_line{true};
      99                 :            : 
     100                 :            :         //! Category-specific log level. Overrides `m_log_level`.
     101                 :            :         std::unordered_map<LogFlags, Level> m_category_log_levels GUARDED_BY(m_cs);
     102                 :            : 
     103                 :            :         //! If there is no category-specific log level, all logs with a severity
     104                 :            :         //! level lower than `m_log_level` will be ignored.
     105                 :          2 :         std::atomic<Level> m_log_level{DEFAULT_LOG_LEVEL};
     106                 :            : 
     107                 :            :         /** Log categories bitfield. */
     108                 :          2 :         std::atomic<uint32_t> m_categories{0};
     109                 :            : 
     110                 :            :         std::string LogTimestampStr(const std::string& str);
     111                 :            : 
     112                 :            :         /** Slots that connect to the print signal */
     113                 :          2 :         std::list<std::function<void(const std::string&)>> m_print_callbacks GUARDED_BY(m_cs) {};
     114                 :            : 
     115                 :            :     public:
     116                 :          2 :         bool m_print_to_console = false;
     117                 :          2 :         bool m_print_to_file = false;
     118                 :            : 
     119                 :          2 :         bool m_log_timestamps = DEFAULT_LOGTIMESTAMPS;
     120                 :          2 :         bool m_log_time_micros = DEFAULT_LOGTIMEMICROS;
     121                 :          2 :         bool m_log_threadnames = DEFAULT_LOGTHREADNAMES;
     122                 :          2 :         bool m_log_sourcelocations = DEFAULT_LOGSOURCELOCATIONS;
     123                 :            : 
     124                 :            :         fs::path m_file_path;
     125                 :          2 :         std::atomic<bool> m_reopen_file{false};
     126                 :            : 
     127                 :            :         /** Send a string to the log output */
     128                 :            :         void LogPrintStr(const std::string& str, const std::string& logging_function, const std::string& source_file, int source_line, BCLog::LogFlags category, BCLog::Level level);
     129                 :            : 
     130                 :            :         /** Returns whether logs will be written to any output */
     131                 :        456 :         bool Enabled() const
     132                 :            :         {
     133                 :        456 :             StdLockGuard scoped_lock(m_cs);
     134 [ +  + ][ +  - ]:        456 :             return m_buffering || m_print_to_console || m_print_to_file || !m_print_callbacks.empty();
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     135                 :        456 :         }
     136                 :            : 
     137                 :            :         /** Connect a slot to the print signal and return the connection */
     138                 :          0 :         std::list<std::function<void(const std::string&)>>::iterator PushBackCallback(std::function<void(const std::string&)> fun)
     139                 :            :         {
     140                 :          0 :             StdLockGuard scoped_lock(m_cs);
     141         [ #  # ]:          0 :             m_print_callbacks.push_back(std::move(fun));
     142                 :          0 :             return --m_print_callbacks.end();
     143                 :          0 :         }
     144                 :            : 
     145                 :            :         /** Delete a connection */
     146                 :          0 :         void DeleteCallback(std::list<std::function<void(const std::string&)>>::iterator it)
     147                 :            :         {
     148                 :          0 :             StdLockGuard scoped_lock(m_cs);
     149                 :          0 :             m_print_callbacks.erase(it);
     150                 :          0 :         }
     151                 :            : 
     152                 :            :         /** Start logging (and flush all buffered messages) */
     153                 :            :         bool StartLogging();
     154                 :            :         /** Only for testing */
     155                 :            :         void DisconnectTestLogger();
     156                 :            : 
     157                 :            :         void ShrinkDebugFile();
     158                 :            : 
     159                 :            :         std::unordered_map<LogFlags, Level> CategoryLevels() const
     160                 :            :         {
     161                 :            :             StdLockGuard scoped_lock(m_cs);
     162                 :            :             return m_category_log_levels;
     163                 :            :         }
     164                 :            :         void SetCategoryLogLevel(const std::unordered_map<LogFlags, Level>& levels)
     165                 :            :         {
     166                 :            :             StdLockGuard scoped_lock(m_cs);
     167                 :            :             m_category_log_levels = levels;
     168                 :            :         }
     169                 :            :         bool SetCategoryLogLevel(const std::string& category_str, const std::string& level_str);
     170                 :            : 
     171                 :          0 :         Level LogLevel() const { return m_log_level.load(); }
     172                 :            :         void SetLogLevel(Level level) { m_log_level = level; }
     173                 :            :         bool SetLogLevel(const std::string& level);
     174                 :            : 
     175                 :          0 :         uint32_t GetCategoryMask() const { return m_categories.load(); }
     176                 :            : 
     177                 :            :         void EnableCategory(LogFlags flag);
     178                 :            :         bool EnableCategory(const std::string& str);
     179                 :            :         void DisableCategory(LogFlags flag);
     180                 :            :         bool DisableCategory(const std::string& str);
     181                 :            : 
     182                 :            :         bool WillLogCategory(LogFlags category) const;
     183                 :            :         bool WillLogCategoryLevel(LogFlags category, Level level) const;
     184                 :            : 
     185                 :            :         /** Returns a vector of the log categories in alphabetical order. */
     186                 :            :         std::vector<LogCategory> LogCategoriesList() const;
     187                 :            :         /** Returns a string with the log categories in alphabetical order. */
     188                 :          4 :         std::string LogCategoriesString() const
     189                 :            :         {
     190         [ +  - ]:        120 :             return Join(LogCategoriesList(), ", ", [&](const LogCategory& i) { return i.category; });
     191                 :          0 :         };
     192                 :            : 
     193                 :            :         //! Returns a string with all user-selectable log levels.
     194                 :            :         std::string LogLevelsString() const;
     195                 :            : 
     196                 :            :         //! Returns the string representation of a log level.
     197                 :            :         std::string LogLevelToStr(BCLog::Level level) const;
     198                 :            : 
     199                 :            :         bool DefaultShrinkDebugFile() const;
     200                 :            :     };
     201                 :            : 
     202                 :            : } // namespace BCLog
     203                 :            : 
     204                 :            : BCLog::Logger& LogInstance();
     205                 :            : 
     206                 :            : /** Return true if log accepts specified category, at the specified level. */
     207                 :       8838 : static inline bool LogAcceptCategory(BCLog::LogFlags category, BCLog::Level level)
     208                 :            : {
     209                 :       8838 :     return LogInstance().WillLogCategoryLevel(category, level);
     210                 :            : }
     211                 :            : 
     212                 :            : /** Return true if str parses as a log category and set the flag */
     213                 :            : bool GetLogCategory(BCLog::LogFlags& flag, const std::string& str);
     214                 :            : 
     215                 :            : // Be conservative when using LogPrintf/error or other things which
     216                 :            : // unconditionally log to debug.log! It should not be the case that an inbound
     217                 :            : // peer can fill up a user's disk with debug.log entries.
     218                 :            : 
     219                 :            : template <typename... Args>
     220                 :        456 : static inline void LogPrintf_(const std::string& logging_function, const std::string& source_file, const int source_line, const BCLog::LogFlags flag, const BCLog::Level level, const char* fmt, const Args&... args)
     221                 :            : {
     222 [ +  + ][ +  - ]:        456 :     if (LogInstance().Enabled()) {
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     223                 :          2 :         std::string log_msg;
     224                 :            :         try {
     225 [ +  - ][ #  # ]:          2 :             log_msg = tfm::format(fmt, args...);
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     226 [ #  # ][ #  # ]:          2 :         } catch (tinyformat::format_error& fmterr) {
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     227                 :            :             /* Original format string will have newline so don't add one here */
     228 [ #  # ][ #  # ]:          0 :             log_msg = "Error \"" + std::string(fmterr.what()) + "\" while formatting log message: " + fmt;
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     229 [ #  # ][ #  # ]:          0 :         }
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     230 [ +  - ][ +  - ]:          2 :         LogInstance().LogPrintStr(log_msg, logging_function, source_file, source_line, flag, level);
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     231                 :          2 :     }
     232                 :        456 : }
     233                 :            : 
     234                 :            : #define LogPrintLevel_(category, level, ...) LogPrintf_(__func__, __FILE__, __LINE__, category, level, __VA_ARGS__)
     235                 :            : 
     236                 :            : // Log unconditionally.
     237                 :            : #define LogPrintf(...) LogPrintLevel_(BCLog::LogFlags::NONE, BCLog::Level::None, __VA_ARGS__)
     238                 :            : 
     239                 :            : // Log unconditionally, prefixing the output with the passed category name.
     240                 :            : #define LogPrintfCategory(category, ...) LogPrintLevel_(category, BCLog::Level::None, __VA_ARGS__)
     241                 :            : 
     242                 :            : // Use a macro instead of a function for conditional logging to prevent
     243                 :            : // evaluating arguments when logging for the category is not enabled.
     244                 :            : 
     245                 :            : // Log conditionally, prefixing the output with the passed category name.
     246                 :            : #define LogPrint(category, ...)                                        \
     247                 :            :     do {                                                               \
     248                 :            :         if (LogAcceptCategory((category), BCLog::Level::Debug)) {      \
     249                 :            :             LogPrintLevel_(category, BCLog::Level::None, __VA_ARGS__); \
     250                 :            :         }                                                              \
     251                 :            :     } while (0)
     252                 :            : 
     253                 :            : // Log conditionally, prefixing the output with the passed category name and severity level.
     254                 :            : #define LogPrintLevel(category, level, ...)               \
     255                 :            :     do {                                                  \
     256                 :            :         if (LogAcceptCategory((category), (level))) {     \
     257                 :            :             LogPrintLevel_(category, level, __VA_ARGS__); \
     258                 :            :         }                                                 \
     259                 :            :     } while (0)
     260                 :            : 
     261                 :            : template <typename... Args>
     262                 :          0 : bool error(const char* fmt, const Args&... args)
     263                 :            : {
     264 [ #  # ][ #  # ]:          0 :     LogPrintf("ERROR: %s\n", tfm::format(fmt, args...));
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     265                 :          0 :     return false;
     266                 :          0 : }
     267                 :            : 
     268                 :            : #endif // BITCOIN_LOGGING_H

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