273 lines
7.7 KiB
C++
273 lines
7.7 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2018 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <logging.h>
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#include <utiltime.h>
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const char * const DEFAULT_DEBUGLOGFILE = "debug.log";
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/**
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* NOTE: the logger instances is leaked on exit. This is ugly, but will be
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* cleaned up by the OS/libc. Defining a logger as a global object doesn't work
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* since the order of destruction of static/global objects is undefined.
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* Consider if the logger gets destroyed, and then some later destructor calls
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* LogPrintf, maybe indirectly, and you get a core dump at shutdown trying to
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* access the logger. When the shutdown sequence is fully audited and tested,
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* explicit destruction of these objects can be implemented by changing this
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* from a raw pointer to a std::unique_ptr.
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*
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* This method of initialization was originally introduced in
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* ee3374234c60aba2cc4c5cd5cac1c0aefc2d817c.
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*/
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BCLog::Logger* const g_logger = new BCLog::Logger();
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bool fLogIPs = DEFAULT_LOGIPS;
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static int FileWriteStr(const std::string &str, FILE *fp)
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{
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return fwrite(str.data(), 1, str.size(), fp);
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}
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bool BCLog::Logger::OpenDebugLog()
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{
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std::lock_guard<std::mutex> scoped_lock(m_file_mutex);
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assert(m_fileout == nullptr);
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assert(!m_file_path.empty());
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m_fileout = fsbridge::fopen(m_file_path, "a");
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if (!m_fileout) {
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return false;
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}
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setbuf(m_fileout, nullptr); // unbuffered
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// dump buffered messages from before we opened the log
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while (!m_msgs_before_open.empty()) {
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FileWriteStr(m_msgs_before_open.front(), m_fileout);
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m_msgs_before_open.pop_front();
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}
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return true;
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}
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void BCLog::Logger::EnableCategory(BCLog::LogFlags flag)
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{
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m_categories |= flag;
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}
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bool BCLog::Logger::EnableCategory(const std::string& str)
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{
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BCLog::LogFlags flag;
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if (!GetLogCategory(flag, str)) return false;
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EnableCategory(flag);
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return true;
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}
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void BCLog::Logger::DisableCategory(BCLog::LogFlags flag)
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{
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m_categories &= ~flag;
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}
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bool BCLog::Logger::DisableCategory(const std::string& str)
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{
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BCLog::LogFlags flag;
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if (!GetLogCategory(flag, str)) return false;
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DisableCategory(flag);
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return true;
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}
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bool BCLog::Logger::WillLogCategory(BCLog::LogFlags category) const
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{
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return (m_categories.load(std::memory_order_relaxed) & category) != 0;
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}
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bool BCLog::Logger::DefaultShrinkDebugFile() const
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{
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return m_categories == BCLog::NONE;
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}
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struct CLogCategoryDesc
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{
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BCLog::LogFlags flag;
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std::string category;
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};
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const CLogCategoryDesc LogCategories[] =
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{
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{BCLog::NONE, "0"},
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{BCLog::NONE, "none"},
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{BCLog::NET, "net"},
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{BCLog::TOR, "tor"},
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{BCLog::MEMPOOL, "mempool"},
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{BCLog::HTTP, "http"},
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{BCLog::BENCH, "bench"},
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{BCLog::ZMQ, "zmq"},
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{BCLog::DB, "db"},
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{BCLog::RPC, "rpc"},
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{BCLog::ESTIMATEFEE, "estimatefee"},
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{BCLog::ADDRMAN, "addrman"},
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{BCLog::SELECTCOINS, "selectcoins"},
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{BCLog::REINDEX, "reindex"},
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{BCLog::CMPCTBLOCK, "cmpctblock"},
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{BCLog::RAND, "rand"},
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{BCLog::PRUNE, "prune"},
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{BCLog::PROXY, "proxy"},
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{BCLog::MEMPOOLREJ, "mempoolrej"},
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{BCLog::LIBEVENT, "libevent"},
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{BCLog::COINDB, "coindb"},
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{BCLog::QT, "qt"},
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{BCLog::LEVELDB, "leveldb"},
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{BCLog::ALL, "1"},
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{BCLog::ALL, "all"},
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};
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bool GetLogCategory(BCLog::LogFlags& flag, const std::string& str)
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{
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if (str == "") {
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flag = BCLog::ALL;
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return true;
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}
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for (const CLogCategoryDesc& category_desc : LogCategories) {
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if (category_desc.category == str) {
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flag = category_desc.flag;
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return true;
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}
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}
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return false;
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}
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std::string ListLogCategories()
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{
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std::string ret;
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int outcount = 0;
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for (const CLogCategoryDesc& category_desc : LogCategories) {
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// Omit the special cases.
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if (category_desc.flag != BCLog::NONE && category_desc.flag != BCLog::ALL) {
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if (outcount != 0) ret += ", ";
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ret += category_desc.category;
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outcount++;
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}
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}
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return ret;
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}
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std::vector<CLogCategoryActive> ListActiveLogCategories()
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{
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std::vector<CLogCategoryActive> ret;
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for (const CLogCategoryDesc& category_desc : LogCategories) {
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// Omit the special cases.
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if (category_desc.flag != BCLog::NONE && category_desc.flag != BCLog::ALL) {
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CLogCategoryActive catActive;
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catActive.category = category_desc.category;
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catActive.active = LogAcceptCategory(category_desc.flag);
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ret.push_back(catActive);
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}
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}
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return ret;
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}
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std::string BCLog::Logger::LogTimestampStr(const std::string &str)
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{
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std::string strStamped;
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if (!m_log_timestamps)
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return str;
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if (m_started_new_line) {
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int64_t nTimeMicros = GetTimeMicros();
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strStamped = FormatISO8601DateTime(nTimeMicros/1000000);
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if (m_log_time_micros) {
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strStamped.pop_back();
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strStamped += strprintf(".%06dZ", nTimeMicros%1000000);
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}
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int64_t mocktime = GetMockTime();
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if (mocktime) {
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strStamped += " (mocktime: " + FormatISO8601DateTime(mocktime) + ")";
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}
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strStamped += ' ' + str;
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} else
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strStamped = str;
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if (!str.empty() && str[str.size()-1] == '\n')
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m_started_new_line = true;
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else
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m_started_new_line = false;
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return strStamped;
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}
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void BCLog::Logger::LogPrintStr(const std::string &str)
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{
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std::string strTimestamped = LogTimestampStr(str);
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if (m_print_to_console) {
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// print to console
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fwrite(strTimestamped.data(), 1, strTimestamped.size(), stdout);
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fflush(stdout);
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}
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if (m_print_to_file) {
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std::lock_guard<std::mutex> scoped_lock(m_file_mutex);
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// buffer if we haven't opened the log yet
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if (m_fileout == nullptr) {
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m_msgs_before_open.push_back(strTimestamped);
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}
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else
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{
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// reopen the log file, if requested
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if (m_reopen_file) {
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m_reopen_file = false;
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FILE* new_fileout = fsbridge::fopen(m_file_path, "a");
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if (new_fileout) {
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setbuf(new_fileout, nullptr); // unbuffered
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fclose(m_fileout);
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m_fileout = new_fileout;
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}
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}
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FileWriteStr(strTimestamped, m_fileout);
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}
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}
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}
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void BCLog::Logger::ShrinkDebugFile()
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{
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// Amount of debug.log to save at end when shrinking (must fit in memory)
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constexpr size_t RECENT_DEBUG_HISTORY_SIZE = 10 * 1000000;
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assert(!m_file_path.empty());
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// Scroll debug.log if it's getting too big
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FILE* file = fsbridge::fopen(m_file_path, "r");
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// Special files (e.g. device nodes) may not have a size.
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size_t log_size = 0;
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try {
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log_size = fs::file_size(m_file_path);
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} catch (const fs::filesystem_error&) {}
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// If debug.log file is more than 10% bigger the RECENT_DEBUG_HISTORY_SIZE
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// trim it down by saving only the last RECENT_DEBUG_HISTORY_SIZE bytes
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if (file && log_size > 11 * (RECENT_DEBUG_HISTORY_SIZE / 10))
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{
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// Restart the file with some of the end
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std::vector<char> vch(RECENT_DEBUG_HISTORY_SIZE, 0);
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if (fseek(file, -((long)vch.size()), SEEK_END)) {
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LogPrintf("Failed to shrink debug log file: fseek(...) failed\n");
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fclose(file);
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return;
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}
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int nBytes = fread(vch.data(), 1, vch.size(), file);
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fclose(file);
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file = fsbridge::fopen(m_file_path, "w");
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if (file)
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{
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fwrite(vch.data(), 1, nBytes, file);
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fclose(file);
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}
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}
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else if (file != nullptr)
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fclose(file);
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}
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