libreoffice-online/common/Log.hpp
Samuel Mehrbrodt b40cf51181 Log fatal errors also to stderr
Change-Id: I5e6429ab007d13a2506c375923049b91c80ffba0
Reviewed-on: https://gerrit.libreoffice.org/72722
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>
Tested-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>
2019-06-04 09:09:37 +02:00

384 lines
14 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
* 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/.
*/
#ifndef INCLUDED_LOG_HPP
#define INCLUDED_LOG_HPP
#include <sys/syscall.h>
#include <unistd.h>
#include <cstddef>
#include <functional>
#include <iostream>
#include <thread>
#include <sstream>
#include <string>
#include <Poco/DateTime.h>
#include <Poco/DateTimeFormat.h>
#include <Poco/DateTimeFormatter.h>
#include <Poco/Logger.h>
#ifdef __ANDROID__
#include <android/log.h>
#endif
#include "Util.hpp"
inline std::ostream& operator<< (std::ostream& os, const Poco::Timestamp& ts)
{
os << Poco::DateTimeFormatter::format(Poco::DateTime(ts),
Poco::DateTimeFormat::ISO8601_FRAC_FORMAT);
return os;
}
namespace Log
{
/// Initialize the logging system.
void initialize(const std::string& name,
const std::string& logLevel,
const bool withColor,
const bool logToFile,
const std::map<std::string, std::string>& config);
/// Returns the underlying logging system.
Poco::Logger& logger();
#if !MOBILEAPP
/// Shutdown and release the logging system.
void shutdown();
#endif
char* prefix(char* buffer, std::size_t len, const char* level);
inline bool traceEnabled() { return logger().trace(); }
inline bool debugEnabled() { return logger().debug(); }
inline bool infoEnabled() { return logger().information(); }
inline bool warnEnabled() { return logger().warning(); }
inline bool errorEnabled() { return logger().error(); }
inline bool fatalEnabled() { return logger().fatal(); }
/// Signal safe prefix logging
void signalLogPrefix();
/// Signal safe logging
void signalLog(const char* message);
/// Signal log number
void signalLogNumber(std::size_t num);
/// The following is to write streaming logs.
/// Log::info() << "Value: 0x" << std::hex << value
/// << ", pointer: " << this << Log::end;
static const struct _end_marker
{
_end_marker()
{
}
} end;
/// Helper class to support implementing streaming
/// operator for logging.
class StreamLogger
{
public:
/// No-op instance.
StreamLogger()
: _enabled(false)
{
}
StreamLogger(std::function<void(const std::string&)> func, const char*level)
: _func(std::move(func)),
_enabled(true)
{
char buffer[1024];
_stream << prefix(buffer, sizeof(buffer) - 1, level);
}
StreamLogger(StreamLogger&& sl) noexcept
: _stream(sl._stream.str()),
_func(std::move(sl._func)),
_enabled(sl._enabled)
{
}
bool enabled() const { return _enabled; }
void flush() const
{
if (_enabled)
{
_func(_stream.str());
}
}
std::ostringstream& getStream() { return _stream; }
private:
std::ostringstream _stream;
std::function<void(const std::string&)> _func;
const bool _enabled;
};
inline StreamLogger trace()
{
return traceEnabled()
? StreamLogger([](const std::string& msg) { logger().trace(msg); }, "TRC")
: StreamLogger();
}
inline StreamLogger debug()
{
return debugEnabled()
? StreamLogger([](const std::string& msg) { logger().debug(msg); }, "DBG")
: StreamLogger();
}
inline StreamLogger info()
{
return infoEnabled()
? StreamLogger([](const std::string& msg) { logger().information(msg); }, "INF")
: StreamLogger();
}
inline StreamLogger warn()
{
return warnEnabled()
? StreamLogger([](const std::string& msg) { logger().warning(msg); }, "WRN")
: StreamLogger();
}
inline StreamLogger error()
{
return errorEnabled()
? StreamLogger([](const std::string& msg) { logger().error(msg); }, "ERR")
: StreamLogger();
}
inline StreamLogger fatal()
{
return fatalEnabled()
? StreamLogger([](const std::string& msg) { logger().fatal(msg); }, "FTL")
: StreamLogger();
}
template <typename U>
StreamLogger& operator<<(StreamLogger& lhs, const U& rhs)
{
if (lhs.enabled())
{
lhs.getStream() << rhs;
}
return lhs;
}
template <typename U>
StreamLogger& operator<<(StreamLogger&& lhs, U&& rhs)
{
if (lhs.enabled())
{
lhs.getStream() << rhs;
}
return lhs;
}
inline StreamLogger& operator<<(StreamLogger& lhs, const Poco::Timestamp& rhs)
{
if (lhs.enabled())
{
lhs.getStream() << Poco::DateTimeFormatter::format(Poco::DateTime(rhs),
Poco::DateTimeFormat::ISO8601_FRAC_FORMAT);
}
return lhs;
}
inline void operator<<(StreamLogger& lhs, const _end_marker&)
{
(void)end;
lhs.flush();
}
/// Dump the invalid id as 0, otherwise dump in hex.
inline std::string to_string(const std::thread::id& id)
{
if (id != std::thread::id())
{
std::ostringstream os;
os << std::hex << "0x" << id << std::dec;
return os.str();
}
return "0";
}
inline StreamLogger& operator<<(StreamLogger& lhs, const std::thread::id& rhs)
{
if (lhs.enabled())
{
lhs.getStream() << Log::to_string(rhs);
}
return lhs;
}
}
#ifndef IOS
#define LOG_FILE_NAME(f) f
#else
// We know that when building with Xcode, __FILE__ will always be a full path, with several slashes,
// so this will always work. We want just the file name, they are unique anyway.
#define LOG_FILE_NAME(f) (strrchr(f, '/')+1)
#endif
#define LOG_END(LOG, FILEP) \
do \
{ \
if (FILEP) \
LOG << "| " << LOG_FILE_NAME(__FILE__) << ':' << __LINE__; \
} while (false)
#ifdef __ANDROID__
#define LOG_BODY_(LOG, PRIO, LVL, X, FILEP) \
char b_[1024]; \
std::ostringstream oss_(Log::prefix(b_, sizeof(b_) - 1, LVL), std::ostringstream::ate); \
oss_ << std::boolalpha << X; \
LOG_END(oss_, FILEP); \
((void)__android_log_print(ANDROID_LOG_DEBUG, "loolwsd", "%s %s", LVL, oss_.str().c_str()))
#else
#define LOG_BODY_(LOG, PRIO, LVL, X, FILEP) \
Poco::Message m_(LOG.name(), "", Poco::Message::PRIO_##PRIO); \
char b_[1024]; \
std::ostringstream oss_(Log::prefix(b_, sizeof(b_) - 1, LVL), std::ostringstream::ate); \
oss_ << std::boolalpha << X; \
LOG_END(oss_, FILEP); \
m_.setText(oss_.str()); \
LOG.log(m_);
#endif
#define LOG_TRC(X) \
do \
{ \
auto &log_ = Log::logger(); \
if (log_.trace()) \
{ \
LOG_BODY_(log_, TRACE, "TRC", X, true); \
} \
} while (false)
#define LOG_TRC_NOFILE(X) \
do \
{ \
auto &log_ = Log::logger(); \
if (log_.trace()) \
{ \
LOG_BODY_(log_, TRACE, "TRC", X, false);\
} \
} while (false)
#define LOG_DBG(X) \
do \
{ \
auto &log_ = Log::logger(); \
if (log_.debug()) \
{ \
LOG_BODY_(log_, DEBUG, "DBG", X, true); \
} \
} while (false)
#define LOG_INF(X) \
do \
{ \
auto &log_ = Log::logger(); \
if (log_.information()) \
{ \
LOG_BODY_(log_, INFORMATION, "INF", X, true); \
} \
} while (false)
#define LOG_WRN(X) \
do \
{ \
auto &log_ = Log::logger(); \
if (log_.warning()) \
{ \
LOG_BODY_(log_, WARNING, "WRN", X, true); \
} \
} while (false)
#define LOG_ERR(X) \
do \
{ \
auto &log_ = Log::logger(); \
if (log_.error()) \
{ \
LOG_BODY_(log_, ERROR, "ERR", X, true); \
} \
} while (false)
#define LOG_SYS(X) \
do \
{ \
auto &log_ = Log::logger(); \
if (log_.error()) \
{ \
LOG_BODY_(log_, ERROR, "ERR", X << " (" << Util::symbolicErrno(errno) << ": " << std::strerror(errno) << ")", true); \
} \
} while (false)
#define LOG_FTL(X) \
do \
{ \
std::cerr << X << std::endl; \
auto &log_ = Log::logger(); \
if (log_.fatal()) \
{ \
LOG_BODY_(log_, FATAL, "FTL", X, true); \
} \
} while (false)
#define LOG_SFL(X) \
do \
{ \
auto &log_ = Log::logger(); \
if (log_.error()) \
{ \
LOG_BODY_(log_, FATAL, "FTL", X << " (" << Util::symbolicErrno(errno) << ": " << std::strerror(errno) << ")", true); \
} \
} while (false)
#define LOG_CHECK(X) \
do \
{ \
if (!(X)) \
{ \
LOG_ERR("Check failed. Expected (" #X ")."); \
} \
} while (false)
#define LOG_CHECK_RET(X, RET) \
do \
{ \
if (!(X)) \
{ \
LOG_ERR("Check failed. Expected (" #X ")."); \
return RET; \
} \
} while (false)
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */