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# 1 : : // Copyright (c) 2009-2010 Satoshi Nakamoto
# 2 : : // Copyright (c) 2009-2020 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 <fs.h>
# 10 : : #include <tinyformat.h>
# 11 : : #include <threadsafety.h>
# 12 : : #include <util/string.h>
# 13 : :
# 14 : : #include <atomic>
# 15 : : #include <cstdint>
# 16 : : #include <list>
# 17 : : #include <mutex>
# 18 : : #include <string>
# 19 : : #include <vector>
# 20 : :
# 21 : : static const bool DEFAULT_LOGTIMEMICROS = false;
# 22 : : static const bool DEFAULT_LOGIPS = false;
# 23 : : static const bool DEFAULT_LOGTIMESTAMPS = true;
# 24 : : static const bool DEFAULT_LOGTHREADNAMES = false;
# 25 : : static const bool DEFAULT_LOGSOURCELOCATIONS = false;
# 26 : : extern const char * const DEFAULT_DEBUGLOGFILE;
# 27 : :
# 28 : : extern bool fLogIPs;
# 29 : :
# 30 : : struct LogCategory {
# 31 : : std::string category;
# 32 : : bool active;
# 33 : : };
# 34 : :
# 35 : : namespace BCLog {
# 36 : : enum LogFlags : uint32_t {
# 37 : : NONE = 0,
# 38 : : NET = (1 << 0),
# 39 : : TOR = (1 << 1),
# 40 : : MEMPOOL = (1 << 2),
# 41 : : HTTP = (1 << 3),
# 42 : : BENCH = (1 << 4),
# 43 : : ZMQ = (1 << 5),
# 44 : : WALLETDB = (1 << 6),
# 45 : : RPC = (1 << 7),
# 46 : : ESTIMATEFEE = (1 << 8),
# 47 : : ADDRMAN = (1 << 9),
# 48 : : SELECTCOINS = (1 << 10),
# 49 : : REINDEX = (1 << 11),
# 50 : : CMPCTBLOCK = (1 << 12),
# 51 : : RAND = (1 << 13),
# 52 : : PRUNE = (1 << 14),
# 53 : : PROXY = (1 << 15),
# 54 : : MEMPOOLREJ = (1 << 16),
# 55 : : LIBEVENT = (1 << 17),
# 56 : : COINDB = (1 << 18),
# 57 : : QT = (1 << 19),
# 58 : : LEVELDB = (1 << 20),
# 59 : : VALIDATION = (1 << 21),
# 60 : : I2P = (1 << 22),
# 61 : : IPC = (1 << 23),
# 62 : : ALL = ~(uint32_t)0,
# 63 : : };
# 64 : :
# 65 : : class Logger
# 66 : : {
# 67 : : private:
# 68 : : 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
# 69 : :
# 70 : : FILE* m_fileout GUARDED_BY(m_cs) = nullptr;
# 71 : : std::list<std::string> m_msgs_before_open GUARDED_BY(m_cs);
# 72 : : bool m_buffering GUARDED_BY(m_cs) = true; //!< Buffer messages before logging can be started.
# 73 : :
# 74 : : /**
# 75 : : * m_started_new_line is a state variable that will suppress printing of
# 76 : : * the timestamp when multiple calls are made that don't end in a
# 77 : : * newline.
# 78 : : */
# 79 : : std::atomic_bool m_started_new_line{true};
# 80 : :
# 81 : : /** Log categories bitfield. */
# 82 : : std::atomic<uint32_t> m_categories{0};
# 83 : :
# 84 : : std::string LogTimestampStr(const std::string& str);
# 85 : :
# 86 : : /** Slots that connect to the print signal */
# 87 : : std::list<std::function<void(const std::string&)>> m_print_callbacks GUARDED_BY(m_cs) {};
# 88 : :
# 89 : : public:
# 90 : : bool m_print_to_console = false;
# 91 : : bool m_print_to_file = false;
# 92 : :
# 93 : : bool m_log_timestamps = DEFAULT_LOGTIMESTAMPS;
# 94 : : bool m_log_time_micros = DEFAULT_LOGTIMEMICROS;
# 95 : : bool m_log_threadnames = DEFAULT_LOGTHREADNAMES;
# 96 : : bool m_log_sourcelocations = DEFAULT_LOGSOURCELOCATIONS;
# 97 : :
# 98 : : fs::path m_file_path;
# 99 : : std::atomic<bool> m_reopen_file{false};
# 100 : :
# 101 : : /** Send a string to the log output */
# 102 : : void LogPrintStr(const std::string& str, const std::string& logging_function, const std::string& source_file, const int source_line);
# 103 : :
# 104 : : /** Returns whether logs will be written to any output */
# 105 : : bool Enabled() const
# 106 : 4168030 : {
# 107 : 4168030 : StdLockGuard scoped_lock(m_cs);
# 108 [ + + ][ - + ]: 4168030 : return m_buffering || m_print_to_console || m_print_to_file || !m_print_callbacks.empty();
# [ + + ][ - + ]
# 109 : 4168030 : }
# 110 : :
# 111 : : /** Connect a slot to the print signal and return the connection */
# 112 : : std::list<std::function<void(const std::string&)>>::iterator PushBackCallback(std::function<void(const std::string&)> fun)
# 113 : 863 : {
# 114 : 863 : StdLockGuard scoped_lock(m_cs);
# 115 : 863 : m_print_callbacks.push_back(std::move(fun));
# 116 : 863 : return --m_print_callbacks.end();
# 117 : 863 : }
# 118 : :
# 119 : : /** Delete a connection */
# 120 : : void DeleteCallback(std::list<std::function<void(const std::string&)>>::iterator it)
# 121 : 15 : {
# 122 : 15 : StdLockGuard scoped_lock(m_cs);
# 123 : 15 : m_print_callbacks.erase(it);
# 124 : 15 : }
# 125 : :
# 126 : : /** Start logging (and flush all buffered messages) */
# 127 : : bool StartLogging();
# 128 : : /** Only for testing */
# 129 : : void DisconnectTestLogger();
# 130 : :
# 131 : : void ShrinkDebugFile();
# 132 : :
# 133 : 10 : uint32_t GetCategoryMask() const { return m_categories.load(); }
# 134 : :
# 135 : : void EnableCategory(LogFlags flag);
# 136 : : bool EnableCategory(const std::string& str);
# 137 : : void DisableCategory(LogFlags flag);
# 138 : : bool DisableCategory(const std::string& str);
# 139 : :
# 140 : : bool WillLogCategory(LogFlags category) const;
# 141 : : /** Returns a vector of the log categories */
# 142 : : std::vector<LogCategory> LogCategoriesList() const;
# 143 : : /** Returns a string with the log categories */
# 144 : : std::string LogCategoriesString() const
# 145 : 2873 : {
# 146 : 68952 : return Join(LogCategoriesList(), ", ", [&](const LogCategory& i) { return i.category; });
# 147 : 2873 : };
# 148 : :
# 149 : : bool DefaultShrinkDebugFile() const;
# 150 : : };
# 151 : :
# 152 : : } // namespace BCLog
# 153 : :
# 154 : : BCLog::Logger& LogInstance();
# 155 : :
# 156 : : /** Return true if log accepts specified category */
# 157 : : static inline bool LogAcceptCategory(BCLog::LogFlags category)
# 158 : 3737640 : {
# 159 : 3737640 : return LogInstance().WillLogCategory(category);
# 160 : 3737640 : }
# 161 : :
# 162 : : /** Return true if str parses as a log category and set the flag */
# 163 : : bool GetLogCategory(BCLog::LogFlags& flag, const std::string& str);
# 164 : :
# 165 : : // Be conservative when using LogPrintf/error or other things which
# 166 : : // unconditionally log to debug.log! It should not be the case that an inbound
# 167 : : // peer can fill up a user's disk with debug.log entries.
# 168 : :
# 169 : : template <typename... Args>
# 170 : : static inline void LogPrintf_(const std::string& logging_function, const std::string& source_file, const int source_line, const char* fmt, const Args&... args)
# 171 : 4168021 : {
# 172 [ + - ][ + - ]: 4168021 : if (LogInstance().Enabled()) {
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# 173 : 4167876 : std::string log_msg;
# 174 : 4167876 : try {
# 175 : 4167876 : log_msg = tfm::format(fmt, args...);
# 176 : 4167876 : } catch (tinyformat::format_error& fmterr) {
# 177 : : /* Original format string will have newline so don't add one here */
# 178 : 0 : log_msg = "Error \"" + std::string(fmterr.what()) + "\" while formatting log message: " + fmt;
# 179 : 0 : }
# 180 : 4167876 : LogInstance().LogPrintStr(log_msg, logging_function, source_file, source_line);
# 181 : 4167836 : }
# 182 : 4168021 : }
# 183 : :
# 184 : 4171594 : #define LogPrintf(...) LogPrintf_(__func__, __FILE__, __LINE__, __VA_ARGS__)
# 185 : :
# 186 : : // Use a macro instead of a function for conditional logging to prevent
# 187 : : // evaluating arguments when logging for the category is not enabled.
# 188 : : #define LogPrint(category, ...) \
# 189 : 3871487 : do { \
# 190 : 3718160 : if (LogAcceptCategory((category))) { \
# 191 : 3715667 : LogPrintf(__VA_ARGS__); \
# 192 : 3715667 : } \
# 193 : 3718160 : } while (0)
# 194 : :
# 195 : : #endif // BITCOIN_LOGGING_H
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