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Diffstat (limited to '')
| -rw-r--r-- | sal/osl/all/log.cxx | 477 |
1 files changed, 477 insertions, 0 deletions
diff --git a/sal/osl/all/log.cxx b/sal/osl/all/log.cxx new file mode 100644 index 000000000..405d5599c --- /dev/null +++ b/sal/osl/all/log.cxx @@ -0,0 +1,477 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + */ + +#include <sal/config.h> + +#include <cassert> +#include <cstdarg> +#include <cstddef> +#include <cstdio> +#include <cstdlib> +#include <cstring> +#include <sstream> + +#include <stdio.h> +#include <string.h> +#include <fstream> + +#include <config_global.h> +#include <osl/thread.hxx> +#include <rtl/string.h> +#include <sal/detail/log.h> +#include <sal/log.hxx> +#include <sal/types.h> +#include <backtraceasstring.hxx> +#include <salusesyslog.hxx> + +#if defined ANDROID +#include <android/log.h> +#elif defined _WIN32 +#include <process.h> +#include <windows.h> +#define OSL_DETAIL_GETPID _getpid() +#else +#include <unistd.h> +#define OSL_DETAIL_GETPID getpid() +#endif + +#if HAVE_SYSLOG_H +#include <syslog.h> +// sal/osl/unx/salinit.cxx::sal_detail_initialize updates this: +bool sal_use_syslog; +#else +bool const sal_use_syslog = false; +#endif + +// Avoid the use of other sal code in this file as much as possible, so that +// this code can be called from other sal code without causing endless +// recursion. + +namespace { + +struct TimeContainer +{ + TimeValue aTime; + TimeContainer() + { + osl_getSystemTime(&aTime); + } +}; + +TimeContainer aStartTime; + +bool equalStrings( + char const * string1, std::size_t length1, char const * string2, + std::size_t length2) +{ + return length1 == length2 && std::memcmp(string1, string2, length1) == 0; +} + +#if !defined ANDROID +char const * toString(sal_detail_LogLevel level) { + switch (level) { + case SAL_DETAIL_LOG_LEVEL_INFO: + return "info"; + case SAL_DETAIL_LOG_LEVEL_WARN: + return "warn"; + case SAL_DETAIL_LOG_LEVEL_DEBUG: + return "debug"; + default: + assert(false); // this cannot happen + return "broken"; + } +} +#endif + +#ifdef _WIN32 + +char const* setEnvFromLoggingIniFile(const char* env, const char* key) +{ + char const* sResult = nullptr; + wchar_t buffer[MAX_PATH]; + GetModuleFileNameW(nullptr, buffer, MAX_PATH); + std::wstring sProgramDirectory(buffer); + std::wstring::size_type pos = sProgramDirectory.find_last_of(L"\\/"); + sProgramDirectory = sProgramDirectory.substr(0, pos+1); + sProgramDirectory += L"logging.ini"; + + std::ifstream logFileStream(sProgramDirectory); + if (!logFileStream.good()) + return sResult; + + std::size_t n; + std::string aKey; + std::string sWantedKey(key); + std::string sLine; + while (std::getline(logFileStream, sLine)) { + if (sLine.find('#') == 0) + continue; + if ( ( n = sLine.find('=') ) != std::string::npos) { + aKey = sLine.substr(0, n); + if (aKey != sWantedKey) + continue; + _putenv_s(env, sLine.substr(n+1, sLine.length()).c_str()); + sResult = std::getenv(env); + break; + } + } + return sResult; +} +#endif + +char const* pLogSelector = nullptr; + +char const* getLogLevelEnvVar() { + static char const* const pLevel = [] { + char const* pResult = nullptr; + + // First check the environment variable, then the setting in logging.ini + char const* env = std::getenv("SAL_LOG"); + +#ifdef _WIN32 + if (!env) + env = setEnvFromLoggingIniFile("SAL_LOG", "LogLevel"); +#endif + + if (env) + { + // Make a copy from the string in environment block + static std::string sLevel(env); + pResult = sLevel.c_str(); + } + return pResult; + }(); + + return pLevel; +} + +#if !defined ANDROID + +std::ofstream * getLogFile() { + static std::ofstream* const pFile = [] { + std::ofstream* pResult = nullptr; + + // First check the environment variable, then the setting in logging.ini + char const* logFile = std::getenv("SAL_LOG_FILE"); + +#ifdef _WIN32 + if (!logFile) + logFile = setEnvFromLoggingIniFile("SAL_LOG_FILE", "LogFilePath"); +#endif + + if (logFile) + { + // stays until process exits + static std::ofstream file(logFile, std::ios::app | std::ios::out); + pResult = &file; + } + + return pResult; + }(); + + return pFile; +} + + +std::pair<bool, bool> getTimestampFlags(char const *selector) +{ + bool outputTimestamp = false; + bool outputRelativeTimer = false; + for (char const* p = selector; p && *p;) + { + if (*p++ == '+') + { + char const * p1 = p; + while (*p1 != '.' && *p1 != '+' && *p1 != '-' && *p1 != '\0') { + ++p1; + } + if (equalStrings(p, p1 - p, RTL_CONSTASCII_STRINGPARAM("TIMESTAMP"))) + outputTimestamp = true; + else if (equalStrings(p, p1 - p, RTL_CONSTASCII_STRINGPARAM("RELATIVETIMER"))) + outputRelativeTimer = true; + char const * p2 = p1; + while (*p2 != '+' && *p2 != '-' && *p2 != '\0') { + ++p2; + } + p = p2; + } + } + return std::pair(outputTimestamp, outputRelativeTimer); +} + +void maybeOutputTimestamp(std::ostringstream &s) { + static const std::pair<bool, bool> aEnvFlags = getTimestampFlags(getLogLevelEnvVar()); + const auto& [outputTimestamp, outputRelativeTimer] = (pLogSelector == nullptr ? aEnvFlags : getTimestampFlags(pLogSelector)); + + if (outputTimestamp) + { + char ts[100]; + TimeValue systemTime; + osl_getSystemTime(&systemTime); + TimeValue localTime; + osl_getLocalTimeFromSystemTime(&systemTime, &localTime); + oslDateTime dateTime; + osl_getDateTimeFromTimeValue(&localTime, &dateTime); + struct tm tm; + tm.tm_sec = dateTime.Seconds; + tm.tm_min = dateTime.Minutes; + tm.tm_hour = dateTime.Hours; + tm.tm_mday = dateTime.Day; + tm.tm_wday = dateTime.DayOfWeek; + tm.tm_mon = dateTime.Month - 1; + tm.tm_year = dateTime.Year - 1900; + tm.tm_yday = 0; + strftime(ts, sizeof(ts), "%Y-%m-%d:%H:%M:%S", &tm); + char milliSecs[11]; + snprintf(milliSecs, sizeof(milliSecs), "%03u", + static_cast<unsigned>(dateTime.NanoSeconds / 1000000)); + s << ts << '.' << milliSecs << ':'; + } + if (!outputRelativeTimer) + return; + + TimeValue now; + osl_getSystemTime(&now); + int seconds = now.Seconds - aStartTime.aTime.Seconds; + int milliSeconds; + if (now.Nanosec < aStartTime.aTime.Nanosec) + { + seconds--; + milliSeconds = 1000 - (aStartTime.aTime.Nanosec - now.Nanosec) / 1000000; + } + else + milliSeconds = (now.Nanosec - aStartTime.aTime.Nanosec) / 1000000; + char relativeTimestamp[100]; + snprintf(relativeTimestamp, sizeof(relativeTimestamp), "%d.%03d", seconds, milliSeconds); + s << relativeTimestamp << ':'; +} + +#endif + +} + +void sal_detail_log( + sal_detail_LogLevel level, char const * area, char const * where, + char const * message, sal_uInt32 backtraceDepth) +{ + std::ostringstream s; +#if !defined ANDROID + // On Android, the area will be used as the "tag," and log info already + // contains timestamp and PID. + if (!sal_use_syslog) { + maybeOutputTimestamp(s); + s << toString(level) << ':'; + } + if (level != SAL_DETAIL_LOG_LEVEL_DEBUG) { + s << area << ':'; + } + s << OSL_DETAIL_GETPID << ':'; +#endif + s << osl::Thread::getCurrentIdentifier() << ':'; + if (level == SAL_DETAIL_LOG_LEVEL_DEBUG) { + s << ' '; + } else { + const size_t nStrLen(std::strlen(SRCDIR "/")); + s << (where + + (std::strncmp(where, SRCDIR "/", nStrLen) == 0 + ? nStrLen : 0)); + } + s << message; + if (backtraceDepth != 0) { + s << " at:\n" << osl::detail::backtraceAsString(backtraceDepth); + } + +#if defined ANDROID + int android_log_level; + switch (level) { + case SAL_DETAIL_LOG_LEVEL_INFO: + android_log_level = ANDROID_LOG_INFO; + break; + case SAL_DETAIL_LOG_LEVEL_WARN: + android_log_level = ANDROID_LOG_WARN; + break; + case SAL_DETAIL_LOG_LEVEL_DEBUG: + android_log_level = ANDROID_LOG_DEBUG; + break; + default: + android_log_level = ANDROID_LOG_INFO; + break; + } + __android_log_print( + android_log_level, area == 0 ? "LibreOffice" : area, "%s", + s.str().c_str()); +#else + if (sal_use_syslog) { +#if HAVE_SYSLOG_H + int prio; + switch (level) { + case SAL_DETAIL_LOG_LEVEL_INFO: + prio = LOG_INFO; + break; + case SAL_DETAIL_LOG_LEVEL_WARN: + prio = LOG_WARNING; + break; + case SAL_DETAIL_LOG_LEVEL_DEBUG: + prio = LOG_DEBUG; + break; + default: + assert(false); // this cannot happen + prio = LOG_WARNING; + } + syslog(prio, "%s", s.str().c_str()); +#endif + } else { + // avoid calling getLogFile() more than once + static std::ofstream * logFile = getLogFile(); + if (logFile) { + *logFile << s.str() << std::endl; + } + else { + s << '\n'; +#ifdef _WIN32 + // write to Windows debugger console, too + OutputDebugStringA(s.str().c_str()); +#endif + std::fputs(s.str().c_str(), stderr); + std::fflush(stderr); + } + } +#endif +} + +void sal_detail_set_log_selector(char const *logSelector) +{ + pLogSelector = logSelector; +} + +void sal_detail_logFormat( + sal_detail_LogLevel level, char const * area, char const * where, + char const * format, ...) +{ + const sal_detail_LogAction eAction + = static_cast<sal_detail_LogAction>(sal_detail_log_report(level, area)); + if (eAction == SAL_DETAIL_LOG_ACTION_IGNORE) + return; + + std::va_list args; + va_start(args, format); + char buf[1024]; + int const len = sizeof buf - RTL_CONSTASCII_LENGTH("..."); + int n = vsnprintf(buf, len, format, args); + if (n < 0) { + std::strcpy(buf, "???"); + } else if (n >= len) { + std::strcpy(buf + len - 1, "..."); + } + sal_detail_log(level, area, where, buf, 0); + va_end(args); + + if (eAction == SAL_DETAIL_LOG_ACTION_FATAL) + std::abort(); +} + +unsigned char sal_detail_log_report(sal_detail_LogLevel level, char const * area) +{ + if (level == SAL_DETAIL_LOG_LEVEL_DEBUG) { + return SAL_DETAIL_LOG_ACTION_LOG; + } + assert(area != nullptr); + static char const* const envEnv = [] { + char const* pResult = getLogLevelEnvVar(); + if (!pResult) + pResult = "+WARN"; + return pResult; + }(); + char const* const env = (pLogSelector == nullptr ? envEnv : pLogSelector); + std::size_t areaLen = std::strlen(area); + enum Sense { POSITIVE = 0, NEGATIVE = 1 }; + std::size_t senseLen[2] = { 0, 1 }; + // initial senseLen[POSITIVE] < senseLen[NEGATIVE], so that if there are + // no matching switches at all, the result will be negative (and + // initializing with 1 is safe as the length of a valid switch, even + // without the "+"/"-" prefix, will always be > 1) + bool senseFatal[2] = { false, false }; + bool seenWarn = false; + bool bFlagFatal = false; + for (char const * p = env;;) { + Sense sense; + switch (*p++) { + case '\0': + { + if (level == SAL_DETAIL_LOG_LEVEL_WARN && !seenWarn) + return sal_detail_log_report(SAL_DETAIL_LOG_LEVEL_INFO, area); + + sal_detail_LogAction eAction = SAL_DETAIL_LOG_ACTION_IGNORE; + // if a specific item is positive and negative (==), default to positive + if (senseLen[POSITIVE] >= senseLen[NEGATIVE]) + { + if (senseFatal[POSITIVE]) eAction = SAL_DETAIL_LOG_ACTION_FATAL; + else eAction = SAL_DETAIL_LOG_ACTION_LOG; + } + return eAction; + } + case '+': + sense = POSITIVE; + break; + case '-': + sense = NEGATIVE; + break; + default: + return SAL_DETAIL_LOG_ACTION_LOG; // upon an illegal SAL_LOG value, enable everything + } + char const * p1 = p; + while (*p1 != '.' && *p1 != '+' && *p1 != '-' && *p1 != '\0') { + ++p1; + } + bool match; + if (equalStrings(p, p1 - p, RTL_CONSTASCII_STRINGPARAM("INFO"))) { + match = level == SAL_DETAIL_LOG_LEVEL_INFO; + } else if (equalStrings(p, p1 - p, RTL_CONSTASCII_STRINGPARAM("WARN"))) + { + match = level == SAL_DETAIL_LOG_LEVEL_WARN; + seenWarn = true; + } else if (equalStrings(p, p1 - p, RTL_CONSTASCII_STRINGPARAM("FATAL"))) + { + bFlagFatal = (sense == POSITIVE); + match = false; + } else if (equalStrings(p, p1 - p, RTL_CONSTASCII_STRINGPARAM("TIMESTAMP")) || + equalStrings(p, p1 - p, RTL_CONSTASCII_STRINGPARAM("RELATIVETIMER"))) + { + // handled later + match = false; + } else { + return SAL_DETAIL_LOG_ACTION_LOG; + // upon an illegal SAL_LOG value, everything is considered + // positive + } + char const * p2 = p1; + while (*p2 != '+' && *p2 != '-' && *p2 != '\0') { + ++p2; + } + if (match) { + if (*p1 == '.') { + ++p1; + std::size_t n = p2 - p1; + if ((n == areaLen && equalStrings(p1, n, area, areaLen)) + || (n < areaLen && area[n] == '.' + && equalStrings(p1, n, area, n))) + { + senseLen[sense] = p2 - p; + senseFatal[sense] = bFlagFatal; + } + } else { + senseLen[sense] = p1 - p; + senseFatal[sense] = bFlagFatal; + } + } + p = p2; + } +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |