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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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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