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 : : #include <util/time.h>
14 : :
15 : : #include <atomic>
16 : : #include <cstdint>
17 : : #include <functional>
18 : : #include <list>
19 : : #include <mutex>
20 : : #include <string>
21 : : #include <unordered_map>
22 : : #include <vector>
23 : :
24 : : static const bool DEFAULT_LOGTIMEMICROS = false;
25 : : static const bool DEFAULT_LOGIPS = false;
26 : : static const bool DEFAULT_LOGTIMESTAMPS = true;
27 : : static const bool DEFAULT_LOGTHREADNAMES = false;
28 : : static const bool DEFAULT_LOGSOURCELOCATIONS = false;
29 : : static constexpr bool DEFAULT_LOGLEVELALWAYS = false;
30 : : extern const char * const DEFAULT_DEBUGLOGFILE;
31 : :
32 : : extern bool fLogIPs;
33 : :
34 : : struct LogCategory {
35 : : std::string category;
36 : : bool active;
37 : : };
38 : :
39 : : namespace BCLog {
40 : : enum LogFlags : uint32_t {
41 : : NONE = 0,
42 : : NET = (1 << 0),
43 : : TOR = (1 << 1),
44 : : MEMPOOL = (1 << 2),
45 : : HTTP = (1 << 3),
46 : : BENCH = (1 << 4),
47 : : ZMQ = (1 << 5),
48 : : WALLETDB = (1 << 6),
49 : : RPC = (1 << 7),
50 : : ESTIMATEFEE = (1 << 8),
51 : : ADDRMAN = (1 << 9),
52 : : SELECTCOINS = (1 << 10),
53 : : REINDEX = (1 << 11),
54 : : CMPCTBLOCK = (1 << 12),
55 : : RAND = (1 << 13),
56 : : PRUNE = (1 << 14),
57 : : PROXY = (1 << 15),
58 : : MEMPOOLREJ = (1 << 16),
59 : : LIBEVENT = (1 << 17),
60 : : COINDB = (1 << 18),
61 : : QT = (1 << 19),
62 : : LEVELDB = (1 << 20),
63 : : VALIDATION = (1 << 21),
64 : : I2P = (1 << 22),
65 : : IPC = (1 << 23),
66 : : #ifdef DEBUG_LOCKCONTENTION
67 : : LOCK = (1 << 24),
68 : : #endif
69 : : BLOCKSTORAGE = (1 << 25),
70 : : TXRECONCILIATION = (1 << 26),
71 : : SCAN = (1 << 27),
72 : : TXPACKAGES = (1 << 28),
73 : : ALL = ~(uint32_t)0,
74 : : };
75 : : enum class Level {
76 : : Trace = 0, // High-volume or detailed logging for development/debugging
77 : : Debug, // Reasonably noisy logging, but still usable in production
78 : : Info, // Default
79 : : Warning,
80 : : Error,
81 : : };
82 : : constexpr auto DEFAULT_LOG_LEVEL{Level::Debug};
83 : : constexpr size_t DEFAULT_MAX_LOG_BUFFER{1'000'000}; // buffer up to 1MB of log data prior to StartLogging
84 : :
85 : 4 : class Logger
86 : : {
87 : : public:
88 : : struct BufferedLog {
89 : : SystemClock::time_point now;
90 : : std::chrono::seconds mocktime;
91 : : std::string str, logging_function, source_file, threadname;
92 : : int source_line;
93 : : LogFlags category;
94 : : Level level;
95 : : };
96 : :
97 : : private:
98 : : 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
99 : :
100 : 1 : FILE* m_fileout GUARDED_BY(m_cs) = nullptr;
101 : : std::list<BufferedLog> m_msgs_before_open GUARDED_BY(m_cs);
102 : 1 : bool m_buffering GUARDED_BY(m_cs) = true; //!< Buffer messages before logging can be started.
103 : 1 : size_t m_max_buffer_memusage GUARDED_BY(m_cs){DEFAULT_MAX_LOG_BUFFER};
104 : 1 : size_t m_cur_buffer_memusage GUARDED_BY(m_cs){0};
105 : 1 : size_t m_buffer_lines_discarded GUARDED_BY(m_cs){0};
106 : :
107 : : /**
108 : : * m_started_new_line is a state variable that will suppress printing of
109 : : * the timestamp when multiple calls are made that don't end in a
110 : : * newline.
111 : : */
112 : 1 : std::atomic_bool m_started_new_line{true};
113 : :
114 : : //! Category-specific log level. Overrides `m_log_level`.
115 : : std::unordered_map<LogFlags, Level> m_category_log_levels GUARDED_BY(m_cs);
116 : :
117 : : //! If there is no category-specific log level, all logs with a severity
118 : : //! level lower than `m_log_level` will be ignored.
119 : 1 : std::atomic<Level> m_log_level{DEFAULT_LOG_LEVEL};
120 : :
121 : : /** Log categories bitfield. */
122 : 1 : std::atomic<uint32_t> m_categories{BCLog::NONE};
123 : :
124 : : void FormatLogStrInPlace(std::string& str, LogFlags category, Level level, std::string_view source_file, int source_line, std::string_view logging_function, std::string_view threadname, SystemClock::time_point now, std::chrono::seconds mocktime) const;
125 : :
126 : : std::string LogTimestampStr(SystemClock::time_point now, std::chrono::seconds mocktime) const;
127 : :
128 : : /** Slots that connect to the print signal */
129 : 1 : std::list<std::function<void(const std::string&)>> m_print_callbacks GUARDED_BY(m_cs) {};
130 : :
131 : : /** Send a string to the log output (internal) */
132 : : void LogPrintStr_(std::string_view str, std::string_view logging_function, std::string_view source_file, int source_line, BCLog::LogFlags category, BCLog::Level level)
133 : : EXCLUSIVE_LOCKS_REQUIRED(m_cs);
134 : :
135 : : std::string GetLogPrefix(LogFlags category, Level level) const;
136 : :
137 : : public:
138 : 1 : bool m_print_to_console = false;
139 : 1 : bool m_print_to_file = false;
140 : :
141 : 1 : bool m_log_timestamps = DEFAULT_LOGTIMESTAMPS;
142 : 1 : bool m_log_time_micros = DEFAULT_LOGTIMEMICROS;
143 : 1 : bool m_log_threadnames = DEFAULT_LOGTHREADNAMES;
144 : 1 : bool m_log_sourcelocations = DEFAULT_LOGSOURCELOCATIONS;
145 : 1 : bool m_always_print_category_level = DEFAULT_LOGLEVELALWAYS;
146 : :
147 : : fs::path m_file_path;
148 : 1 : std::atomic<bool> m_reopen_file{false};
149 : :
150 : : /** Send a string to the log output */
151 : : void LogPrintStr(std::string_view str, std::string_view logging_function, std::string_view source_file, int source_line, BCLog::LogFlags category, BCLog::Level level)
152 : : EXCLUSIVE_LOCKS_REQUIRED(!m_cs);
153 : :
154 : : /** Returns whether logs will be written to any output */
155 : 8575411 : bool Enabled() const EXCLUSIVE_LOCKS_REQUIRED(!m_cs)
156 : : {
157 : 8575411 : StdLockGuard scoped_lock(m_cs);
158 [ + + + - : 8575411 : return m_buffering || m_print_to_console || m_print_to_file || !m_print_callbacks.empty();
+ + ]
159 : 8575411 : }
160 : :
161 : : /** Connect a slot to the print signal and return the connection */
162 : 0 : std::list<std::function<void(const std::string&)>>::iterator PushBackCallback(std::function<void(const std::string&)> fun) EXCLUSIVE_LOCKS_REQUIRED(!m_cs)
163 : : {
164 : 0 : StdLockGuard scoped_lock(m_cs);
165 [ # # ]: 0 : m_print_callbacks.push_back(std::move(fun));
166 : 0 : return --m_print_callbacks.end();
167 : 0 : }
168 : :
169 : : /** Delete a connection */
170 : 0 : void DeleteCallback(std::list<std::function<void(const std::string&)>>::iterator it) EXCLUSIVE_LOCKS_REQUIRED(!m_cs)
171 : : {
172 : 0 : StdLockGuard scoped_lock(m_cs);
173 : 0 : m_print_callbacks.erase(it);
174 : 0 : }
175 : :
176 : : /** Start logging (and flush all buffered messages) */
177 : : bool StartLogging() EXCLUSIVE_LOCKS_REQUIRED(!m_cs);
178 : : /** Only for testing */
179 : : void DisconnectTestLogger() EXCLUSIVE_LOCKS_REQUIRED(!m_cs);
180 : :
181 : : /** Disable logging
182 : : * This offers a slight speedup and slightly smaller memory usage
183 : : * compared to leaving the logging system in its default state.
184 : : * Mostly intended for libbitcoin-kernel apps that don't want any logging.
185 : : * Should be used instead of StartLogging().
186 : : */
187 : : void DisableLogging() EXCLUSIVE_LOCKS_REQUIRED(!m_cs);
188 : :
189 : : void ShrinkDebugFile();
190 : :
191 : : std::unordered_map<LogFlags, Level> CategoryLevels() const EXCLUSIVE_LOCKS_REQUIRED(!m_cs)
192 : : {
193 : : StdLockGuard scoped_lock(m_cs);
194 : : return m_category_log_levels;
195 : : }
196 : : void SetCategoryLogLevel(const std::unordered_map<LogFlags, Level>& levels) EXCLUSIVE_LOCKS_REQUIRED(!m_cs)
197 : : {
198 : : StdLockGuard scoped_lock(m_cs);
199 : : m_category_log_levels = levels;
200 : : }
201 : : bool SetCategoryLogLevel(std::string_view category_str, std::string_view level_str) EXCLUSIVE_LOCKS_REQUIRED(!m_cs);
202 : :
203 : 5588491 : Level LogLevel() const { return m_log_level.load(); }
204 : : void SetLogLevel(Level level) { m_log_level = level; }
205 : : bool SetLogLevel(std::string_view level);
206 : :
207 : 171 : uint32_t GetCategoryMask() const { return m_categories.load(); }
208 : :
209 : : void EnableCategory(LogFlags flag);
210 : : bool EnableCategory(std::string_view str);
211 : : void DisableCategory(LogFlags flag);
212 : : bool DisableCategory(std::string_view str);
213 : :
214 : : bool WillLogCategory(LogFlags category) const;
215 : : bool WillLogCategoryLevel(LogFlags category, Level level) const EXCLUSIVE_LOCKS_REQUIRED(!m_cs);
216 : :
217 : : /** Returns a vector of the log categories in alphabetical order. */
218 : : std::vector<LogCategory> LogCategoriesList() const;
219 : : /** Returns a string with the log categories in alphabetical order. */
220 : 3799 : std::string LogCategoriesString() const
221 : : {
222 [ + - ]: 110171 : return util::Join(LogCategoriesList(), ", ", [&](const LogCategory& i) { return i.category; });
223 : 0 : };
224 : :
225 : : //! Returns a string with all user-selectable log levels.
226 : : std::string LogLevelsString() const;
227 : :
228 : : //! Returns the string representation of a log level.
229 : : static std::string LogLevelToStr(BCLog::Level level);
230 : :
231 : : bool DefaultShrinkDebugFile() const;
232 : : };
233 : :
234 : : } // namespace BCLog
235 : :
236 : : BCLog::Logger& LogInstance();
237 : :
238 : : /** Return true if log accepts specified category, at the specified level. */
239 : 46850779 : static inline bool LogAcceptCategory(BCLog::LogFlags category, BCLog::Level level)
240 : : {
241 : 46850779 : return LogInstance().WillLogCategoryLevel(category, level);
242 : : }
243 : :
244 : : /** Return true if str parses as a log category and set the flag */
245 : : bool GetLogCategory(BCLog::LogFlags& flag, std::string_view str);
246 : :
247 : : // Be conservative when using functions that
248 : : // unconditionally log to debug.log! It should not be the case that an inbound
249 : : // peer can fill up a user's disk with debug.log entries.
250 : :
251 : : template <typename... Args>
252 : 8575473 : static inline void LogPrintf_(std::string_view logging_function, std::string_view source_file, const int source_line, const BCLog::LogFlags flag, const BCLog::Level level, const char* fmt, const Args&... args)
253 : : {
254 [ + + + + : 8575473 : if (LogInstance().Enabled()) {
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255 : 6028292 : std::string log_msg;
256 : : try {
257 [ + - + - : 6028292 : log_msg = tfm::format(fmt, args...);
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258 [ # # # # : 6028292 : } catch (tinyformat::format_error& fmterr) {
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259 : : /* Original format string will have newline so don't add one here */
260 [ # # # # : 0 : log_msg = "Error \"" + std::string(fmterr.what()) + "\" while formatting log message: " + fmt;
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262 [ + - + - : 6028292 : LogInstance().LogPrintStr(log_msg, logging_function, source_file, source_line, flag, level);
+ - + - +
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# ]
263 : 6028292 : }
264 : 8575473 : }
265 : :
266 : : #define LogPrintLevel_(category, level, ...) LogPrintf_(__func__, __FILE__, __LINE__, category, level, __VA_ARGS__)
267 : :
268 : : // Log unconditionally.
269 : : #define LogInfo(...) LogPrintLevel_(BCLog::LogFlags::ALL, BCLog::Level::Info, __VA_ARGS__)
270 : : #define LogWarning(...) LogPrintLevel_(BCLog::LogFlags::ALL, BCLog::Level::Warning, __VA_ARGS__)
271 : : #define LogError(...) LogPrintLevel_(BCLog::LogFlags::ALL, BCLog::Level::Error, __VA_ARGS__)
272 : :
273 : : // Deprecated unconditional logging.
274 : : #define LogPrintf(...) LogInfo(__VA_ARGS__)
275 : : #define LogPrintfCategory(category, ...) LogPrintLevel_(category, BCLog::Level::Info, __VA_ARGS__)
276 : :
277 : : // Use a macro instead of a function for conditional logging to prevent
278 : : // evaluating arguments when logging for the category is not enabled.
279 : :
280 : : // Log conditionally, prefixing the output with the passed category name and severity level.
281 : : #define LogPrintLevel(category, level, ...) \
282 : : do { \
283 : : if (LogAcceptCategory((category), (level))) { \
284 : : LogPrintLevel_(category, level, __VA_ARGS__); \
285 : : } \
286 : : } while (0)
287 : :
288 : : // Log conditionally, prefixing the output with the passed category name.
289 : : #define LogDebug(category, ...) LogPrintLevel(category, BCLog::Level::Debug, __VA_ARGS__)
290 : : #define LogTrace(category, ...) LogPrintLevel(category, BCLog::Level::Trace, __VA_ARGS__)
291 : :
292 : : // Deprecated conditional logging
293 : : #define LogPrint(category, ...) LogDebug(category, __VA_ARGS__)
294 : :
295 : : #endif // BITCOIN_LOGGING_H
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