MOVEONLY: Move logging code from util.{h,cpp} to new files.

5 files changed, 412 insertions, 377 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index 1bbb92bf42..521687eb45 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -113,6 +113,7 @@ BITCOIN_CORE_H = \
   keystore.h \
   dbwrapper.h \
   limitedmap.h \
+  logging.h \
   memusage.h \
   merkleblock.h \
   miner.h \
@@ -364,6 +365,7 @@ libbitcoin_util_a_SOURCES = \
   fs.cpp \
   interfaces/handler.cpp \
   interfaces/node.cpp \
+  logging.cpp \
   random.cpp \
   rpc/protocol.cpp \
   rpc/util.cpp \
diff --git a/src/logging.cpp b/src/logging.cpp
new file mode 100644
index 0000000000..e481582321
--- /dev/null
+++ b/src/logging.cpp
@@ -0,0 +1,283 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <logging.h>
+#include <util.h>
+#include <utilstrencodings.h>
+
+#include <list>
+#include <mutex>
+
+const char * const DEFAULT_DEBUGLOGFILE = "debug.log";
+
+bool fPrintToConsole = false;
+bool fPrintToDebugLog = true;
+
+bool fLogTimestamps = DEFAULT_LOGTIMESTAMPS;
+bool fLogTimeMicros = DEFAULT_LOGTIMEMICROS;
+bool fLogIPs = DEFAULT_LOGIPS;
+std::atomic<bool> fReopenDebugLog(false);
+
+/** Log categories bitfield. */
+std::atomic<uint32_t> logCategories(0);
+/**
+ * LogPrintf() has been broken a couple of times now
+ * by well-meaning people adding mutexes in the most straightforward way.
+ * It breaks because it may be called by global destructors during shutdown.
+ * Since the order of destruction of static/global objects is undefined,
+ * defining a mutex as a global object doesn't work (the mutex gets
+ * destroyed, and then some later destructor calls OutputDebugStringF,
+ * maybe indirectly, and you get a core dump at shutdown trying to lock
+ * the mutex).
+ */
+
+static std::once_flag debugPrintInitFlag;
+
+/**
+ * We use std::call_once() to make sure mutexDebugLog and
+ * vMsgsBeforeOpenLog are initialized in a thread-safe manner.
+ *
+ * NOTE: fileout, mutexDebugLog and sometimes vMsgsBeforeOpenLog
+ * are leaked on exit. This is ugly, but will be cleaned up by
+ * the OS/libc. When the shutdown sequence is fully audited and
+ * tested, explicit destruction of these objects can be implemented.
+ */
+static FILE* fileout = nullptr;
+static std::mutex* mutexDebugLog = nullptr;
+static std::list<std::string>* vMsgsBeforeOpenLog;
+
+static int FileWriteStr(const std::string &str, FILE *fp)
+{
+    return fwrite(str.data(), 1, str.size(), fp);
+}
+
+static void DebugPrintInit()
+{
+    assert(mutexDebugLog == nullptr);
+    mutexDebugLog = new std::mutex();
+    vMsgsBeforeOpenLog = new std::list<std::string>;
+}
+
+fs::path GetDebugLogPath()
+{
+    fs::path logfile(gArgs.GetArg("-debuglogfile", DEFAULT_DEBUGLOGFILE));
+    return AbsPathForConfigVal(logfile);
+}
+
+bool OpenDebugLog()
+{
+    std::call_once(debugPrintInitFlag, &DebugPrintInit);
+    std::lock_guard<std::mutex> scoped_lock(*mutexDebugLog);
+
+    assert(fileout == nullptr);
+    assert(vMsgsBeforeOpenLog);
+    fs::path pathDebug = GetDebugLogPath();
+
+    fileout = fsbridge::fopen(pathDebug, "a");
+    if (!fileout) {
+        return false;
+    }
+
+    setbuf(fileout, nullptr); // unbuffered
+    // dump buffered messages from before we opened the log
+    while (!vMsgsBeforeOpenLog->empty()) {
+        FileWriteStr(vMsgsBeforeOpenLog->front(), fileout);
+        vMsgsBeforeOpenLog->pop_front();
+    }
+
+    delete vMsgsBeforeOpenLog;
+    vMsgsBeforeOpenLog = nullptr;
+    return true;
+}
+
+struct CLogCategoryDesc
+{
+    uint32_t flag;
+    std::string category;
+};
+
+const CLogCategoryDesc LogCategories[] =
+{
+    {BCLog::NONE, "0"},
+    {BCLog::NONE, "none"},
+    {BCLog::NET, "net"},
+    {BCLog::TOR, "tor"},
+    {BCLog::MEMPOOL, "mempool"},
+    {BCLog::HTTP, "http"},
+    {BCLog::BENCH, "bench"},
+    {BCLog::ZMQ, "zmq"},
+    {BCLog::DB, "db"},
+    {BCLog::RPC, "rpc"},
+    {BCLog::ESTIMATEFEE, "estimatefee"},
+    {BCLog::ADDRMAN, "addrman"},
+    {BCLog::SELECTCOINS, "selectcoins"},
+    {BCLog::REINDEX, "reindex"},
+    {BCLog::CMPCTBLOCK, "cmpctblock"},
+    {BCLog::RAND, "rand"},
+    {BCLog::PRUNE, "prune"},
+    {BCLog::PROXY, "proxy"},
+    {BCLog::MEMPOOLREJ, "mempoolrej"},
+    {BCLog::LIBEVENT, "libevent"},
+    {BCLog::COINDB, "coindb"},
+    {BCLog::QT, "qt"},
+    {BCLog::LEVELDB, "leveldb"},
+    {BCLog::ALL, "1"},
+    {BCLog::ALL, "all"},
+};
+
+bool GetLogCategory(uint32_t *f, const std::string *str)
+{
+    if (f && str) {
+        if (*str == "") {
+            *f = BCLog::ALL;
+            return true;
+        }
+        for (unsigned int i = 0; i < ARRAYLEN(LogCategories); i++) {
+            if (LogCategories[i].category == *str) {
+                *f = LogCategories[i].flag;
+                return true;
+            }
+        }
+    }
+    return false;
+}
+
+std::string ListLogCategories()
+{
+    std::string ret;
+    int outcount = 0;
+    for (unsigned int i = 0; i < ARRAYLEN(LogCategories); i++) {
+        // Omit the special cases.
+        if (LogCategories[i].flag != BCLog::NONE && LogCategories[i].flag != BCLog::ALL) {
+            if (outcount != 0) ret += ", ";
+            ret += LogCategories[i].category;
+            outcount++;
+        }
+    }
+    return ret;
+}
+
+std::vector<CLogCategoryActive> ListActiveLogCategories()
+{
+    std::vector<CLogCategoryActive> ret;
+    for (unsigned int i = 0; i < ARRAYLEN(LogCategories); i++) {
+        // Omit the special cases.
+        if (LogCategories[i].flag != BCLog::NONE && LogCategories[i].flag != BCLog::ALL) {
+            CLogCategoryActive catActive;
+            catActive.category = LogCategories[i].category;
+            catActive.active = LogAcceptCategory(LogCategories[i].flag);
+            ret.push_back(catActive);
+        }
+    }
+    return ret;
+}
+
+/**
+ * fStartedNewLine is a state variable held by the calling context that will
+ * suppress printing of the timestamp when multiple calls are made that don't
+ * end in a newline. Initialize it to true, and hold it, in the calling context.
+ */
+static std::string LogTimestampStr(const std::string &str, std::atomic_bool *fStartedNewLine)
+{
+    std::string strStamped;
+
+    if (!fLogTimestamps)
+        return str;
+
+    if (*fStartedNewLine) {
+        int64_t nTimeMicros = GetTimeMicros();
+        strStamped = FormatISO8601DateTime(nTimeMicros/1000000);
+        if (fLogTimeMicros) {
+            strStamped.pop_back();
+            strStamped += strprintf(".%06dZ", nTimeMicros%1000000);
+        }
+        int64_t mocktime = GetMockTime();
+        if (mocktime) {
+            strStamped += " (mocktime: " + FormatISO8601DateTime(mocktime) + ")";
+        }
+        strStamped += ' ' + str;
+    } else
+        strStamped = str;
+
+    if (!str.empty() && str[str.size()-1] == '\n')
+        *fStartedNewLine = true;
+    else
+        *fStartedNewLine = false;
+
+    return strStamped;
+}
+
+int LogPrintStr(const std::string &str)
+{
+    int ret = 0; // Returns total number of characters written
+    static std::atomic_bool fStartedNewLine(true);
+
+    std::string strTimestamped = LogTimestampStr(str, &fStartedNewLine);
+
+    if (fPrintToConsole) {
+        // print to console
+        ret = fwrite(strTimestamped.data(), 1, strTimestamped.size(), stdout);
+        fflush(stdout);
+    }
+    if (fPrintToDebugLog) {
+        std::call_once(debugPrintInitFlag, &DebugPrintInit);
+        std::lock_guard<std::mutex> scoped_lock(*mutexDebugLog);
+
+        // buffer if we haven't opened the log yet
+        if (fileout == nullptr) {
+            assert(vMsgsBeforeOpenLog);
+            ret = strTimestamped.length();
+            vMsgsBeforeOpenLog->push_back(strTimestamped);
+        }
+        else
+        {
+            // reopen the log file, if requested
+            if (fReopenDebugLog) {
+                fReopenDebugLog = false;
+                fs::path pathDebug = GetDebugLogPath();
+                if (fsbridge::freopen(pathDebug,"a",fileout) != nullptr)
+                    setbuf(fileout, nullptr); // unbuffered
+            }
+
+            ret = FileWriteStr(strTimestamped, fileout);
+        }
+    }
+    return ret;
+}
+
+void ShrinkDebugFile()
+{
+    // Amount of debug.log to save at end when shrinking (must fit in memory)
+    constexpr size_t RECENT_DEBUG_HISTORY_SIZE = 10 * 1000000;
+    // Scroll debug.log if it's getting too big
+    fs::path pathLog = GetDebugLogPath();
+    FILE* file = fsbridge::fopen(pathLog, "r");
+
+    // Special files (e.g. device nodes) may not have a size.
+    size_t log_size = 0;
+    try {
+        log_size = fs::file_size(pathLog);
+    } catch (boost::filesystem::filesystem_error &) {}
+
+    // If debug.log file is more than 10% bigger the RECENT_DEBUG_HISTORY_SIZE
+    // trim it down by saving only the last RECENT_DEBUG_HISTORY_SIZE bytes
+    if (file && log_size > 11 * (RECENT_DEBUG_HISTORY_SIZE / 10))
+    {
+        // Restart the file with some of the end
+        std::vector<char> vch(RECENT_DEBUG_HISTORY_SIZE, 0);
+        fseek(file, -((long)vch.size()), SEEK_END);
+        int nBytes = fread(vch.data(), 1, vch.size(), file);
+        fclose(file);
+
+        file = fsbridge::fopen(pathLog, "w");
+        if (file)
+        {
+            fwrite(vch.data(), 1, nBytes, file);
+            fclose(file);
+        }
+    }
+    else if (file != nullptr)
+        fclose(file);
+}
diff --git a/src/logging.h b/src/logging.h
new file mode 100644
index 0000000000..4053f75acf
--- /dev/null
+++ b/src/logging.h
@@ -0,0 +1,125 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_LOGGING_H
+#define BITCOIN_LOGGING_H
+
+#include <fs.h>
+#include <tinyformat.h>
+
+#include <atomic>
+#include <cstdint>
+#include <string>
+#include <vector>
+
+static const bool DEFAULT_LOGTIMEMICROS = false;
+static const bool DEFAULT_LOGIPS        = false;
+static const bool DEFAULT_LOGTIMESTAMPS = true;
+extern const char * const DEFAULT_DEBUGLOGFILE;
+
+extern bool fPrintToConsole;
+extern bool fPrintToDebugLog;
+
+extern bool fLogTimestamps;
+extern bool fLogTimeMicros;
+extern bool fLogIPs;
+extern std::atomic<bool> fReopenDebugLog;
+
+extern std::atomic<uint32_t> logCategories;
+
+struct CLogCategoryActive
+{
+    std::string category;
+    bool active;
+};
+
+namespace BCLog {
+    enum LogFlags : uint32_t {
+        NONE        = 0,
+        NET         = (1 <<  0),
+        TOR         = (1 <<  1),
+        MEMPOOL     = (1 <<  2),
+        HTTP        = (1 <<  3),
+        BENCH       = (1 <<  4),
+        ZMQ         = (1 <<  5),
+        DB          = (1 <<  6),
+        RPC         = (1 <<  7),
+        ESTIMATEFEE = (1 <<  8),
+        ADDRMAN     = (1 <<  9),
+        SELECTCOINS = (1 << 10),
+        REINDEX     = (1 << 11),
+        CMPCTBLOCK  = (1 << 12),
+        RAND        = (1 << 13),
+        PRUNE       = (1 << 14),
+        PROXY       = (1 << 15),
+        MEMPOOLREJ  = (1 << 16),
+        LIBEVENT    = (1 << 17),
+        COINDB      = (1 << 18),
+        QT          = (1 << 19),
+        LEVELDB     = (1 << 20),
+        ALL         = ~(uint32_t)0,
+    };
+}
+/** Return true if log accepts specified category */
+static inline bool LogAcceptCategory(uint32_t category)
+{
+    return (logCategories.load(std::memory_order_relaxed) & category) != 0;
+}
+
+/** Returns a string with the log categories. */
+std::string ListLogCategories();
+
+/** Returns a vector of the active log categories. */
+std::vector<CLogCategoryActive> ListActiveLogCategories();
+
+/** Return true if str parses as a log category and set the flags in f */
+bool GetLogCategory(uint32_t *f, const std::string *str);
+
+/** Send a string to the log output */
+int LogPrintStr(const std::string &str);
+
+/** Get format string from VA_ARGS for error reporting */
+template<typename... Args> std::string FormatStringFromLogArgs(const char *fmt, const Args&... args) { return fmt; }
+
+static inline void MarkUsed() {}
+template<typename T, typename... Args> static inline void MarkUsed(const T& t, const Args&... args)
+{
+    (void)t;
+    MarkUsed(args...);
+}
+
+// Be conservative when using LogPrintf/error or other things which
+// unconditionally log to debug.log! It should not be the case that an inbound
+// peer can fill up a user's disk with debug.log entries.
+
+#ifdef USE_COVERAGE
+#define LogPrintf(...) do { MarkUsed(__VA_ARGS__); } while(0)
+#define LogPrint(category, ...) do { MarkUsed(__VA_ARGS__); } while(0)
+#else
+#define LogPrintf(...) do { \
+    if (fPrintToConsole || fPrintToDebugLog) { \
+        std::string _log_msg_; /* Unlikely name to avoid shadowing variables */ \
+        try { \
+            _log_msg_ = tfm::format(__VA_ARGS__); \
+        } catch (tinyformat::format_error &fmterr) { \
+            /* Original format string will have newline so don't add one here */ \
+            _log_msg_ = "Error \"" + std::string(fmterr.what()) + "\" while formatting log message: " + FormatStringFromLogArgs(__VA_ARGS__); \
+        } \
+        LogPrintStr(_log_msg_); \
+    } \
+} while(0)
+
+#define LogPrint(category, ...) do { \
+    if (LogAcceptCategory((category))) { \
+        LogPrintf(__VA_ARGS__); \
+    } \
+} while(0)
+#endif
+
+fs::path GetDebugLogPath();
+bool OpenDebugLog();
+void ShrinkDebugFile();
+
+#endif // BITCOIN_LOGGING_H
diff --git a/src/util.cpp b/src/util.cpp
index 6b0bffa35a..4fb027b731 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -84,21 +84,11 @@ const int64_t nStartupTime = GetTime();
 
 const char * const BITCOIN_CONF_FILENAME = "bitcoin.conf";
 const char * const BITCOIN_PID_FILENAME = "bitcoind.pid";
-const char * const DEFAULT_DEBUGLOGFILE = "debug.log";
 
 ArgsManager gArgs;
-bool fPrintToConsole = false;
-bool fPrintToDebugLog = true;
 
-bool fLogTimestamps = DEFAULT_LOGTIMESTAMPS;
-bool fLogTimeMicros = DEFAULT_LOGTIMEMICROS;
-bool fLogIPs = DEFAULT_LOGIPS;
-std::atomic<bool> fReopenDebugLog(false);
 CTranslationInterface translationInterface;
 
-/** Log categories bitfield. */
-std::atomic<uint32_t> logCategories(0);
-
 /** Init OpenSSL library multithreading support */
 static std::unique_ptr<CCriticalSection[]> ppmutexOpenSSL;
 void locking_callback(int mode, int i, const char* file, int line) NO_THREAD_SAFETY_ANALYSIS
@@ -147,231 +137,6 @@ public:
 }
 instance_of_cinit;
 
-/**
- * LogPrintf() has been broken a couple of times now
- * by well-meaning people adding mutexes in the most straightforward way.
- * It breaks because it may be called by global destructors during shutdown.
- * Since the order of destruction of static/global objects is undefined,
- * defining a mutex as a global object doesn't work (the mutex gets
- * destroyed, and then some later destructor calls OutputDebugStringF,
- * maybe indirectly, and you get a core dump at shutdown trying to lock
- * the mutex).
- */
-
-static std::once_flag debugPrintInitFlag;
-
-/**
- * We use std::call_once() to make sure mutexDebugLog and
- * vMsgsBeforeOpenLog are initialized in a thread-safe manner.
- *
- * NOTE: fileout, mutexDebugLog and sometimes vMsgsBeforeOpenLog
- * are leaked on exit. This is ugly, but will be cleaned up by
- * the OS/libc. When the shutdown sequence is fully audited and
- * tested, explicit destruction of these objects can be implemented.
- */
-static FILE* fileout = nullptr;
-static std::mutex* mutexDebugLog = nullptr;
-static std::list<std::string>* vMsgsBeforeOpenLog;
-
-static int FileWriteStr(const std::string &str, FILE *fp)
-{
-    return fwrite(str.data(), 1, str.size(), fp);
-}
-
-static void DebugPrintInit()
-{
-    assert(mutexDebugLog == nullptr);
-    mutexDebugLog = new std::mutex();
-    vMsgsBeforeOpenLog = new std::list<std::string>;
-}
-
-fs::path GetDebugLogPath()
-{
-    fs::path logfile(gArgs.GetArg("-debuglogfile", DEFAULT_DEBUGLOGFILE));
-    return AbsPathForConfigVal(logfile);
-}
-
-bool OpenDebugLog()
-{
-    std::call_once(debugPrintInitFlag, &DebugPrintInit);
-    std::lock_guard<std::mutex> scoped_lock(*mutexDebugLog);
-
-    assert(fileout == nullptr);
-    assert(vMsgsBeforeOpenLog);
-    fs::path pathDebug = GetDebugLogPath();
-
-    fileout = fsbridge::fopen(pathDebug, "a");
-    if (!fileout) {
-        return false;
-    }
-
-    setbuf(fileout, nullptr); // unbuffered
-    // dump buffered messages from before we opened the log
-    while (!vMsgsBeforeOpenLog->empty()) {
-        FileWriteStr(vMsgsBeforeOpenLog->front(), fileout);
-        vMsgsBeforeOpenLog->pop_front();
-    }
-
-    delete vMsgsBeforeOpenLog;
-    vMsgsBeforeOpenLog = nullptr;
-    return true;
-}
-
-struct CLogCategoryDesc
-{
-    uint32_t flag;
-    std::string category;
-};
-
-const CLogCategoryDesc LogCategories[] =
-{
-    {BCLog::NONE, "0"},
-    {BCLog::NONE, "none"},
-    {BCLog::NET, "net"},
-    {BCLog::TOR, "tor"},
-    {BCLog::MEMPOOL, "mempool"},
-    {BCLog::HTTP, "http"},
-    {BCLog::BENCH, "bench"},
-    {BCLog::ZMQ, "zmq"},
-    {BCLog::DB, "db"},
-    {BCLog::RPC, "rpc"},
-    {BCLog::ESTIMATEFEE, "estimatefee"},
-    {BCLog::ADDRMAN, "addrman"},
-    {BCLog::SELECTCOINS, "selectcoins"},
-    {BCLog::REINDEX, "reindex"},
-    {BCLog::CMPCTBLOCK, "cmpctblock"},
-    {BCLog::RAND, "rand"},
-    {BCLog::PRUNE, "prune"},
-    {BCLog::PROXY, "proxy"},
-    {BCLog::MEMPOOLREJ, "mempoolrej"},
-    {BCLog::LIBEVENT, "libevent"},
-    {BCLog::COINDB, "coindb"},
-    {BCLog::QT, "qt"},
-    {BCLog::LEVELDB, "leveldb"},
-    {BCLog::ALL, "1"},
-    {BCLog::ALL, "all"},
-};
-
-bool GetLogCategory(uint32_t *f, const std::string *str)
-{
-    if (f && str) {
-        if (*str == "") {
-            *f = BCLog::ALL;
-            return true;
-        }
-        for (unsigned int i = 0; i < ARRAYLEN(LogCategories); i++) {
-            if (LogCategories[i].category == *str) {
-                *f = LogCategories[i].flag;
-                return true;
-            }
-        }
-    }
-    return false;
-}
-
-std::string ListLogCategories()
-{
-    std::string ret;
-    int outcount = 0;
-    for (unsigned int i = 0; i < ARRAYLEN(LogCategories); i++) {
-        // Omit the special cases.
-        if (LogCategories[i].flag != BCLog::NONE && LogCategories[i].flag != BCLog::ALL) {
-            if (outcount != 0) ret += ", ";
-            ret += LogCategories[i].category;
-            outcount++;
-        }
-    }
-    return ret;
-}
-
-std::vector<CLogCategoryActive> ListActiveLogCategories()
-{
-    std::vector<CLogCategoryActive> ret;
-    for (unsigned int i = 0; i < ARRAYLEN(LogCategories); i++) {
-        // Omit the special cases.
-        if (LogCategories[i].flag != BCLog::NONE && LogCategories[i].flag != BCLog::ALL) {
-            CLogCategoryActive catActive;
-            catActive.category = LogCategories[i].category;
-            catActive.active = LogAcceptCategory(LogCategories[i].flag);
-            ret.push_back(catActive);
-        }
-    }
-    return ret;
-}
-
-/**
- * fStartedNewLine is a state variable held by the calling context that will
- * suppress printing of the timestamp when multiple calls are made that don't
- * end in a newline. Initialize it to true, and hold it, in the calling context.
- */
-static std::string LogTimestampStr(const std::string &str, std::atomic_bool *fStartedNewLine)
-{
-    std::string strStamped;
-
-    if (!fLogTimestamps)
-        return str;
-
-    if (*fStartedNewLine) {
-        int64_t nTimeMicros = GetTimeMicros();
-        strStamped = FormatISO8601DateTime(nTimeMicros/1000000);
-        if (fLogTimeMicros) {
-            strStamped.pop_back();
-            strStamped += strprintf(".%06dZ", nTimeMicros%1000000);
-        }
-        int64_t mocktime = GetMockTime();
-        if (mocktime) {
-            strStamped += " (mocktime: " + FormatISO8601DateTime(mocktime) + ")";
-        }
-        strStamped += ' ' + str;
-    } else
-        strStamped = str;
-
-    if (!str.empty() && str[str.size()-1] == '\n')
-        *fStartedNewLine = true;
-    else
-        *fStartedNewLine = false;
-
-    return strStamped;
-}
-
-int LogPrintStr(const std::string &str)
-{
-    int ret = 0; // Returns total number of characters written
-    static std::atomic_bool fStartedNewLine(true);
-
-    std::string strTimestamped = LogTimestampStr(str, &fStartedNewLine);
-
-    if (fPrintToConsole) {
-        // print to console
-        ret = fwrite(strTimestamped.data(), 1, strTimestamped.size(), stdout);
-        fflush(stdout);
-    }
-    if (fPrintToDebugLog) {
-        std::call_once(debugPrintInitFlag, &DebugPrintInit);
-        std::lock_guard<std::mutex> scoped_lock(*mutexDebugLog);
-
-        // buffer if we haven't opened the log yet
-        if (fileout == nullptr) {
-            assert(vMsgsBeforeOpenLog);
-            ret = strTimestamped.length();
-            vMsgsBeforeOpenLog->push_back(strTimestamped);
-        }
-        else
-        {
-            // reopen the log file, if requested
-            if (fReopenDebugLog) {
-                fReopenDebugLog = false;
-                fs::path pathDebug = GetDebugLogPath();
-                if (fsbridge::freopen(pathDebug,"a",fileout) != nullptr)
-                    setbuf(fileout, nullptr); // unbuffered
-            }
-
-            ret = FileWriteStr(strTimestamped, fileout);
-        }
-    }
-    return ret;
-}
-
 /** A map that contains all the currently held directory locks. After
  * successful locking, these will be held here until the global destructor
  * cleans them up and thus automatically unlocks them, or ReleaseDirectoryLocks
@@ -1117,41 +882,6 @@ void AllocateFileRange(FILE *file, unsigned int offset, unsigned int length) {
 #endif
 }
 
-void ShrinkDebugFile()
-{
-    // Amount of debug.log to save at end when shrinking (must fit in memory)
-    constexpr size_t RECENT_DEBUG_HISTORY_SIZE = 10 * 1000000;
-    // Scroll debug.log if it's getting too big
-    fs::path pathLog = GetDebugLogPath();
-    FILE* file = fsbridge::fopen(pathLog, "r");
-
-    // Special files (e.g. device nodes) may not have a size.
-    size_t log_size = 0;
-    try {
-        log_size = fs::file_size(pathLog);
-    } catch (boost::filesystem::filesystem_error &) {}
-
-    // If debug.log file is more than 10% bigger the RECENT_DEBUG_HISTORY_SIZE
-    // trim it down by saving only the last RECENT_DEBUG_HISTORY_SIZE bytes
-    if (file && log_size > 11 * (RECENT_DEBUG_HISTORY_SIZE / 10))
-    {
-        // Restart the file with some of the end
-        std::vector<char> vch(RECENT_DEBUG_HISTORY_SIZE, 0);
-        fseek(file, -((long)vch.size()), SEEK_END);
-        int nBytes = fread(vch.data(), 1, vch.size(), file);
-        fclose(file);
-
-        file = fsbridge::fopen(pathLog, "w");
-        if (file)
-        {
-            fwrite(vch.data(), 1, nBytes, file);
-            fclose(file);
-        }
-    }
-    else if (file != nullptr)
-        fclose(file);
-}
-
 #ifdef WIN32
 fs::path GetSpecialFolderPath(int nFolder, bool fCreate)
 {
diff --git a/src/util.h b/src/util.h
index ffdee99d27..6e742f8b91 100644
--- a/src/util.h
+++ b/src/util.h
@@ -5,7 +5,7 @@
 
 /**
  * Server/client environment: argument handling, config file parsing,
- * logging, thread wrappers, startup time
+ * thread wrappers, startup time
  */
 #ifndef BITCOIN_UTIL_H
 #define BITCOIN_UTIL_H
@@ -16,6 +16,7 @@
 
 #include <compat.h>
 #include <fs.h>
+#include <logging.h>
 #include <sync.h>
 #include <tinyformat.h>
 #include <utiltime.h>
@@ -36,11 +37,6 @@
 // Application startup time (used for uptime calculation)
 int64_t GetStartupTime();
 
-static const bool DEFAULT_LOGTIMEMICROS = false;
-static const bool DEFAULT_LOGIPS        = false;
-static const bool DEFAULT_LOGTIMESTAMPS = true;
-extern const char * const DEFAULT_DEBUGLOGFILE;
-
 /** Signals for translation. */
 class CTranslationInterface
 {
@@ -49,20 +45,11 @@ public:
     boost::signals2::signal<std::string (const char* psz)> Translate;
 };
 
-extern bool fPrintToConsole;
-extern bool fPrintToDebugLog;
-
-extern bool fLogTimestamps;
-extern bool fLogTimeMicros;
-extern bool fLogIPs;
-extern std::atomic<bool> fReopenDebugLog;
 extern CTranslationInterface translationInterface;
 
 extern const char * const BITCOIN_CONF_FILENAME;
 extern const char * const BITCOIN_PID_FILENAME;
 
-extern std::atomic<uint32_t> logCategories;
-
 /**
  * Translation function: Call Translate signal on UI interface, which returns a boost::optional result.
  * If no translation slot is registered, nothing is returned, and simply return the input.
@@ -76,95 +63,6 @@ inline std::string _(const char* psz)
 void SetupEnvironment();
 bool SetupNetworking();
 
-struct CLogCategoryActive
-{
-    std::string category;
-    bool active;
-};
-
-namespace BCLog {
-    enum LogFlags : uint32_t {
-        NONE        = 0,
-        NET         = (1 <<  0),
-        TOR         = (1 <<  1),
-        MEMPOOL     = (1 <<  2),
-        HTTP        = (1 <<  3),
-        BENCH       = (1 <<  4),
-        ZMQ         = (1 <<  5),
-        DB          = (1 <<  6),
-        RPC         = (1 <<  7),
-        ESTIMATEFEE = (1 <<  8),
-        ADDRMAN     = (1 <<  9),
-        SELECTCOINS = (1 << 10),
-        REINDEX     = (1 << 11),
-        CMPCTBLOCK  = (1 << 12),
-        RAND        = (1 << 13),
-        PRUNE       = (1 << 14),
-        PROXY       = (1 << 15),
-        MEMPOOLREJ  = (1 << 16),
-        LIBEVENT    = (1 << 17),
-        COINDB      = (1 << 18),
-        QT          = (1 << 19),
-        LEVELDB     = (1 << 20),
-        ALL         = ~(uint32_t)0,
-    };
-}
-/** Return true if log accepts specified category */
-static inline bool LogAcceptCategory(uint32_t category)
-{
-    return (logCategories.load(std::memory_order_relaxed) & category) != 0;
-}
-
-/** Returns a string with the log categories. */
-std::string ListLogCategories();
-
-/** Returns a vector of the active log categories. */
-std::vector<CLogCategoryActive> ListActiveLogCategories();
-
-/** Return true if str parses as a log category and set the flags in f */
-bool GetLogCategory(uint32_t *f, const std::string *str);
-
-/** Send a string to the log output */
-int LogPrintStr(const std::string &str);
-
-/** Get format string from VA_ARGS for error reporting */
-template<typename... Args> std::string FormatStringFromLogArgs(const char *fmt, const Args&... args) { return fmt; }
-
-static inline void MarkUsed() {}
-template<typename T, typename... Args> static inline void MarkUsed(const T& t, const Args&... args)
-{
-    (void)t;
-    MarkUsed(args...);
-}
-
-// Be conservative when using LogPrintf/error or other things which
-// unconditionally log to debug.log! It should not be the case that an inbound
-// peer can fill up a user's disk with debug.log entries.
-
-#ifdef USE_COVERAGE
-#define LogPrintf(...) do { MarkUsed(__VA_ARGS__); } while(0)
-#define LogPrint(category, ...) do { MarkUsed(__VA_ARGS__); } while(0)
-#else
-#define LogPrintf(...) do { \
-    if (fPrintToConsole || fPrintToDebugLog) { \
-        std::string _log_msg_; /* Unlikely name to avoid shadowing variables */ \
-        try { \
-            _log_msg_ = tfm::format(__VA_ARGS__); \
-        } catch (tinyformat::format_error &fmterr) { \
-            /* Original format string will have newline so don't add one here */ \
-            _log_msg_ = "Error \"" + std::string(fmterr.what()) + "\" while formatting log message: " + FormatStringFromLogArgs(__VA_ARGS__); \
-        } \
-        LogPrintStr(_log_msg_); \
-    } \
-} while(0)
-
-#define LogPrint(category, ...) do { \
-    if (LogAcceptCategory((category))) { \
-        LogPrintf(__VA_ARGS__); \
-    } \
-} while(0)
-#endif
-
 template<typename... Args>
 bool error(const char* fmt, const Args&... args)
 {
@@ -199,9 +97,6 @@ void CreatePidFile(const fs::path &path, pid_t pid);
 #ifdef WIN32
 fs::path GetSpecialFolderPath(int nFolder, bool fCreate = true);
 #endif
-fs::path GetDebugLogPath();
-bool OpenDebugLog();
-void ShrinkDebugFile();
 void runCommand(const std::string& strCommand);
 
 /**