我用C ++编写了一个带有OpenCV和boost的应用程序，它运行良好且正确，但在退出之前它崩溃了（如果我一步一步地调试，它会在主要结束时return 0;崩溃）说：
在kdevelop中：
*** Error in `/home/xxx/git_repos/my_proj/build/my_proj': free(): invalid pointer: 0x00000000008939c0 ***
*** Crashed with return code: 0 ***
在命令行中：
*** Error in `./my_proj': free(): invalid pointer: 0x00000000008939c0 ***
Aborted (core dumped)
如果我使用gdb：
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
*** Error in `/home/xxx/git_repos/my_proj/build/plate_info_extractor': free(): invalid pointer: 0x00000000008939c0 ***
Program received signal SIGABRT, Aborted.
0x00007ffff5b83cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
56 ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
请帮忙吗？我无法弄清楚出了什么问题。
我评论了一些代码部分，似乎问题出现在我用来记录错误/信息的代码中......所以：
#include "CLogger.hpp"
static void help(const std::string& appNameIn)
{
std::cerr << "Usage: " << appNameIn << " <option(s)> SOURCES" << std::endl
<< "Options:" << std::endl
<< " -h,--help Show this help message" << std::endl
<< " -c,--config CONFIG FILE Specify the name and path to the config file" << std::endl
<< std::endl
<< std::endl;
}
enum RetVals
{
NO_ERRORS,
NOT_ENOUGH_PARAMETERS,
UNKNOWN_OPTION,
SHOW_USAGE,
UNKNOWN_EXCEPTION,
OTHER_EXCEPTION,
};
int main(int argc, char **argv)
{
Logger::initFilesList();
Logger::initLogging();
BoostLogger lg = setClassNameAttribute("main");
if (argc == 3)
{
std::string opt = argv[1];
if (opt == "-c" || opt == "--config")
{
try
{
std::cout << "running" << std::endl;
}
catch (std::exception& e)
{
BOOST_LOG_SEV(lg, Logger::SeverityLevels::error) << "Other exception: " << e.what();
return OTHER_EXCEPTION;
}
catch (...)
{
BOOST_LOG_SEV(lg, Logger::SeverityLevels::error) << "Unkown exception ...";
return UNKNOWN_EXCEPTION;
}
}
else
{
help(argv[0]);
BOOST_LOG_SEV(lg, Logger::SeverityLevels::debug) << "The options are -c or --config, -h or --help";
return UNKNOWN_OPTION;
}
}
else if (argc == 2 && (std::string(argv[1]) == "-h" || std::string(argv[1]) == "--help"))
{
help(argv[0]);
BOOST_LOG_SEV(lg, Logger::SeverityLevels::debug) << "Call help function";
return SHOW_USAGE;
}
else
{
help(argv[0]);
BOOST_LOG_SEV(lg, Logger::SeverityLevels::debug) << "The number of input parameters is wrong";
return NOT_ENOUGH_PARAMETERS;
}
return NO_ERRORS;
}
和CLogger.hpp：
#pragma once
#include <list>
#include <string>
#include <boost/log/common.hpp>
#include <boost/log/sinks/text_file_backend.hpp>
#include <boost/log/sinks/text_ostream_backend.hpp>
#include <boost/log/utility/setup/common_attributes.hpp>
#include <boost/concept_check.hpp>
#include <boost/filesystem.hpp>
namespace fs = boost::filesystem;
class Logger
{
private:
static std::list< std::string > sm_logFilesList;
static const std::string sm_folderOfLogFiles;
/** the function adds the input log file to the list
*
* @param logFilePathIn : input log file path
*/
static void addNewLogFileToList(const std::string& logFilePathIn, bool sorting = false);
/** The function adds new logs to new log file and remove the oltest ones to have always 2 log files */
static void addNewRemoveOldLogs(bool sorting = false);
/** @returns : if the input path is valid or not */
static bool checkPath(const boost::filesystem::path& pathIn);
/** @returns if the file with the first input path was more recent accesed than the file with the second input path
*/
static bool compareAccessTime(const std::string& path1In, const std::string& path2In);
/** The function remove the old log files and keeps just the most recent two */
static void removeOldLogFiles();
/** The function is calles at the end of each file and removes the old files keeping just the last two */
static void openingHandler(boost::log::sinks::text_file_backend::stream_type& file);
public:
enum SeverityLevels
{
debug,
info,
warning,
error
};
/** The function sets the sm_logFilesList to contain the files if there are log files from earlier runs */
static void initFilesList();
/** The fuction is initializing the sinks and the formatter of the logger */
static void initLogging();
};
typedef boost::log::sources::severity_logger< Logger::SeverityLevels > BoostLogger;
/** the overloaded << operator of the BoostLogger */
std::ostream& operator<< (std::ostream& strm, Logger::SeverityLevels level);
/** The function sets the logger attribute ClassName to the specified string and returns the initialized logger
*
* @param classNameIn : input string name of the class
*
* @returns : initialized BoostLogger
*/
BoostLogger setClassNameAttribute(const std::string& classNameIn);
和实施：
#include "CLogger.hpp"
#include <boost/log/attributes.hpp>
#include <boost/log/attributes/current_process_id.hpp>
#include <boost/log/attributes/current_process_name.hpp>
#include <boost/log/core/core.hpp>
#include <boost/log/expressions.hpp>
#include <boost/log/sinks/sync_frontend.hpp>
#include <boost/log/sinks/text_file_backend.hpp>
#include <boost/log/sinks/text_ostream_backend.hpp>
#include <boost/log/sources/severity_logger.hpp>
#include <boost/log/support/date_time.hpp>
#include <boost/log/utility/setup/file.hpp>
typedef boost::log::sinks::synchronous_sink< boost::log::sinks::text_file_backend > SinkTextFileBakend;
BOOST_LOG_ATTRIBUTE_KEYWORD(correlid, "CorrelationID", std::string)
BOOST_LOG_ATTRIBUTE_KEYWORD(severity, "Severity", Logger::SeverityLevels)
BOOST_LOG_ATTRIBUTE_KEYWORD(timestamp, "TimeStamp", boost::posix_time::ptime)
BOOST_LOG_ATTRIBUTE_KEYWORD(threadid, "ThreadID", boost::log::attributes::current_thread_id)
BOOST_LOG_ATTRIBUTE_KEYWORD(classname, "ClassName", std::string)
std::list< std::string > Logger::sm_logFilesList;
const std::string Logger::sm_folderOfLogFiles = "../logs/";
std::ostream& operator<<(std::ostream& strm, Logger::SeverityLevels level)
{
static const char* strings[] =
{
"DEBUG",
"INFO",
"WARN",
"ERROR"
};
if (static_cast< std::size_t >(level) < sizeof(strings) / sizeof(*strings))
strm << strings[level];
else
strm << static_cast< int >(level);
return strm;
}
BoostLogger setClassNameAttribute(const std::string& classNameIn)
{
BoostLogger lg;
lg.add_attribute("ClassName", boost::log::attributes::constant<std::string>(classNameIn));
return lg;
}
void Logger::removeOldLogFiles()
{
while (sm_logFilesList.size() > 2)
{
std::string fileToDelete = sm_logFilesList.front();
if (fs::exists(fs::path(fileToDelete)))
{
fs::remove(fs::path(fileToDelete));
sm_logFilesList.pop_front();
}
}
}
bool Logger::compareAccessTime(const std::string& path1In, const std::string& path2In)
{
return (fs::last_write_time(fs::path(path1In)) < fs::last_write_time(fs::path(path2In)));
}
void Logger::addNewLogFileToList(const std::string& logFilePathIn, bool sorting)
{
if (std::find(sm_logFilesList.begin(), sm_logFilesList.end(), logFilePathIn) == sm_logFilesList.end())
{
sm_logFilesList.push_back(logFilePathIn);
if (sorting)
{
sm_logFilesList.sort(compareAccessTime);
}
removeOldLogFiles();
}
}
void Logger::addNewRemoveOldLogs(bool sorting)
{
fs::path path(sm_folderOfLogFiles);
fs::directory_iterator endDir;
if (checkPath(path))
{
for (fs::directory_iterator it(path); it != endDir; it++)
{
if (fs::is_regular_file(it->status()))
{
if (fs::extension(*it) == ".log")
{
std::string fileToPush = it->path().string();
addNewLogFileToList(fileToPush, sorting);
}
}
}
}
}
bool Logger::checkPath(const boost::filesystem::path& pathIn)
{
if (!fs::exists(pathIn))
{
return false;
}
if (!fs::is_directory(pathIn))
{
return false;
}
return true;
}
void Logger::openingHandler(boost::log::sinks::text_file_backend::stream_type& file)
{
addNewRemoveOldLogs();
}
void Logger::initFilesList()
{
addNewRemoveOldLogs(true);
}
void Logger::initLogging()
{
// Create a backend
boost::shared_ptr< SinkTextFileBakend > sink = boost::log::add_file_log(
sm_folderOfLogFiles + "plate_info_extractor_%Y-%m-%d_%H-%M-%S.%N.log",
boost::log::keywords::format = boost::log::expressions::stream
<< boost::log::expressions::attr< boost::log::attributes::current_process_name::value_type >("Executable") << "("
<< boost::log::expressions::attr< boost::log::attributes::current_process_id::value_type >("ExeUID") << ") CID("
<< correlid << ") " << severity << "["
<< boost::log::expressions::format_date_time< boost::posix_time::ptime >("TimeStamp", "%Y-%m-%d %H:%M:%S.%f")
<< "] [" << boost::log::expressions::attr< boost::log::attributes::current_thread_id::value_type >("ThreadID")
<< "] " << classname << " - " << boost::log::expressions::smessage,
boost::log::keywords::open_mode = (std::ios::out | std::ios::app),
boost::log::keywords::rotation_size = 2 * 1024 * 1024,
boost::log::keywords::auto_flush = true
);
sink->locked_backend()->set_open_handler(&openingHandler);
boost::log::core::get()->set_filter(severity >= SeverityLevels::info);
boost::log::core::get()->add_sink(sink);
#ifdef DEBUGGING
boost::shared_ptr< boost::log::sinks::text_ostream_backend > backend =
boost::make_shared< boost::log::sinks::text_ostream_backend >();
backend->add_stream(
boost::shared_ptr< std::ostream >(&std::cout));
// Enable auto-flushing after each log record written
backend->auto_flush(true);
// Wrap it into the frontend and register in the core.
// The backend requires synchronization in the frontend.
// for testing and printing log in sysout
boost::shared_ptr< boost::log::sinks::synchronous_sink< boost::log::sinks::text_ostream_backend > > backend_sink(
new boost::log::sinks::synchronous_sink< boost::log::sinks::text_ostream_backend >(backend));
backend_sink->set_formatter(
boost::log::expressions::stream
// line id will be written in hex, 8-digits, zero-filled
<< boost::log::expressions::attr< boost::log::attributes::current_process_name::value_type >("Executable")
<< "(" << boost::log::expressions::attr< boost::log::attributes::current_process_name::value_type >("ExeUID")
<< ") CID(" << correlid << ") " << severity << " ["
<< boost::log::expressions::format_date_time< boost::posix_time::ptime >("TimeStamp", "%Y-%m-%d %H:%M:%S.%f")
<< "] [" << boost::log::expressions::attr< boost::log::attributes::current_thread_id::value_type >("ThreadID")
<< "] " << classname << " - " << boost::log::expressions::smessage);
boost::log::core::get()->add_sink(backend_sink); // for testing and printing log in sysout
#endif
}
我希望现在有足够的信息：）
答案 0 :(得分：5)
这一行：
backend->add_stream(boost::shared_ptr< std::ostream >(&std::cout));
看起来非常灾难我。退出时，您的程序将尝试delete std :: cout。 我不熟悉Boost Log，所以我不知道如何正确设置std :: cout的接收器。
由于Arpegius指出你应该使用null_deleter来避免删除。有点像这样：
backend->add_stream(boost::shared_ptr< std::ostream>(&std::cout, boost::null_deleter()));