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分享Fedora 11 下Qt程序报错问题求解
Qt程序会在运行一定时间后报错，时间不确定，每次报错的位置都不定，出现过三次报错现象为下图所示，请大神帮忙解决下
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jinjianxinxh 2013-01-25
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兄弟你不把整个工程发出来 真不好找
haltwang 2013-01-25
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设断电应该能看出死在哪一行吧
自强不息00001 2013-01-25
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帮忙看下吧
自强不息00001 2013-01-23
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错误报在下面这些函数中的
int CLS_DBManage::GetCurrentSign(int _iCurrentLogID, int _CSZPChannelID, int _iKaKouMode)
{
if(!m_blConnected) return -1;
int iCurrentSign = 0;
try
{
char pcSQL[512] = {0};
qDebug()<<"[CLS_DBManage:GetCurrentSign]: &pcSQL is "<<&pcSQL;
if(1 == _iKaKouMode)//change lml
{
snprintf(pcSQL, sizeof(pcSQL),"SELECT LOG_ID from TAB_CAPLOG where (ALARM_TYPE = 7624 OR ALARM_TYPE = 7623 OR ALARM_TYPE = 7622 OR ALARM_TYPE = 1303 OR ALARM_TYPE = 7322) and CHANNEL_ID = %d and LOG_ID = %d", _CSZPChannelID, _iCurrentLogID);
}
else if(0 == _iKaKouMode)
{
snprintf(pcSQL, sizeof(pcSQL),"SELECT LOG_ID from TAB_CAPLOG where ALARM_TYPE = 0 and CHANNEL_ID = %d and LOG_ID = %d", _CSZPChannelID, _iCurrentLogID);
}
qDebug()<<"[CLS_DBManage:GetCurrentSign]: pcSQL is "<<pcSQL;
pthread_mutex_lock(&m_DBLock);
std::auto_ptr< sql::Statement > stmtCurrent(m_pConnection->createStatement());
qDebug()<<"[CLS_DBManage:GetCurrentSign]: &stmtCurrent is "<<&stmtCurrent;
std::auto_ptr< sql::ResultSet > resCurrent(stmtCurrent->executeQuery( pcSQL ) );
qDebug()<<"[CLS_DBManage:GetCurrentSign]: &resCurrent is "<<&resCurrent;
while(resCurrent->next())
{
iCurrentSign ++;
}
pthread_mutex_unlock(&m_DBLock);
}
catch(sql::SQLException& e)
{
pthread_mutex_unlock(&m_DBLock);
cpLog( LOG_ERR, "CLS_DBManage::GetCurrentSign error:%s", e.what());
RepairInsertErr(e.what());
StartDataBase(g_strDatabaseName);
return -1;
}
return iCurrentSign;
}
int CLS_DBManage::GetPreSign(int _iCurrentLogID, int _CSZPChannelID, int _iKaKouMode)
{
if(!m_blConnected) return -1;
int iPreSign = 0;
try
{
char pcSQL[512] = {0};
qDebug()<<"[CLS_DBManage:GetPreSign]: &pcSQL is "<<&pcSQL;
if(1 == _iKaKouMode)
{
snprintf(pcSQL, sizeof(pcSQL),"SELECT LOG_ID from TAB_CAPLOG where (ALARM_TYPE = 7624 OR ALARM_TYPE = 7623 OR ALARM_TYPE = 7622 OR ALARM_TYPE = 1303 OR ALARM_TYPE = 7322) and CHANNEL_ID = %d and LOG_ID < %d limit 1", _CSZPChannelID, _iCurrentLogID);
}
else if(0 == _iKaKouMode)
{
snprintf(pcSQL, sizeof(pcSQL),"SELECT LOG_ID from TAB_CAPLOG where ALARM_TYPE = 0 and CHANNEL_ID = %d and LOG_ID < %d limit 1", _CSZPChannelID, _iCurrentLogID);
}
qDebug()<<"[CLS_DBManage:GetPreSign]: pcSQL is "<<pcSQL;
pthread_mutex_lock(&m_DBLock);
std::auto_ptr< sql::Statement > stmtPre(m_pConnection->createStatement());
qDebug()<<"[CLS_DBManage:GetPreSign]: &stmtPre is "<<&stmtPre;
std::auto_ptr< sql::ResultSet > resPre(stmtPre->executeQuery( pcSQL ) );
qDebug()<<"[CLS_DBManage:GetPreSign]: &resPre is "<<&resPre;
while(resPre->next())
{
iPreSign ++;
}
pthread_mutex_unlock(&m_DBLock);
}
catch(sql::SQLException& e)
{
pthread_mutex_unlock(&m_DBLock);
cpLog( LOG_ERR, "CLS_DBManage::GetPreSign error:%s", e.what());
RepairInsertErr(e.what());
StartDataBase(g_strDatabaseName);
return -1;
}
return iPreSign;
}
int CLS_DBManage::GetNextSign(int _iCurrentLogID, int _CSZPChannelID, int _iKaKouMode)
{
if(!m_blConnected) return -1;
int iNextSign = 0;
try
{
char pcSQL[512] = {0};
qDebug()<<"[CLS_DBManage:GetPreSign]: &pcSQL is "<<&pcSQL;
if(1 == _iKaKouMode)
{
snprintf(pcSQL, sizeof(pcSQL),"SELECT LOG_ID from TAB_CAPLOG where (ALARM_TYPE = 7624 OR ALARM_TYPE = 7623 OR ALARM_TYPE = 7622 OR ALARM_TYPE = 1303 OR ALARM_TYPE = 7322) and CHANNEL_ID = %d and LOG_ID > %d limit 1", _CSZPChannelID, _iCurrentLogID);
}
else if(0 == _iKaKouMode)
{
snprintf(pcSQL, sizeof(pcSQL),"SELECT LOG_ID from TAB_CAPLOG where ALARM_TYPE = 0 and CHANNEL_ID = %d and LOG_ID > %d limit 1", _CSZPChannelID, _iCurrentLogID);
}
qDebug()<<"[CLS_DBManage:GetPreSign]: pcSQL is "<<pcSQL;
pthread_mutex_lock(&m_DBLock);
std::auto_ptr< sql::Statement > stmtNext(m_pConnection->createStatement());
qDebug()<<"[CLS_DBManage:GetPreSign]: &stmtNext is "<<&stmtNext;
std::auto_ptr< sql::ResultSet > resNext(stmtNext->executeQuery( pcSQL ) );
qDebug()<<"[CLS_DBManage:GetPreSign]: &resNext is "<<&resNext;
while(resNext->next())
{
iNextSign ++;
}
pthread_mutex_unlock(&m_DBLock);
}
catch(sql::SQLException& e)
{
pthread_mutex_unlock(&m_DBLock);
cpLog( LOG_ERR, "CLS_DBManage::GetNextSign error:%s", e.what());
RepairInsertErr(e.what());
StartDataBase(g_strDatabaseName);
return -1;
}
return iNextSign;
}
int CLS_DBManage::GetInfoForUpdateBtnState(int _iCurrentLogID, int _CSZPChannelID, int _iKaKouMode)
{
int iRet = -1;
try
{
if(0 == GetCurrentSign(_iCurrentLogID, _CSZPChannelID, _iKaKouMode))
{
iRet = 0;
}
else if((0 == GetPreSign(_iCurrentLogID, _CSZPChannelID, _iKaKouMode)) \
&& (0 == GetNextSign(_iCurrentLogID, _CSZPChannelID, _iKaKouMode)))
{
iRet = 1;
}
else if((GetPreSign(_iCurrentLogID, _CSZPChannelID, _iKaKouMode) > 0) \
&& (0 == GetNextSign(_iCurrentLogID, _CSZPChannelID, _iKaKouMode)))
{
iRet = 2;
}
else if((0 == GetPreSign(_iCurrentLogID, _CSZPChannelID, _iKaKouMode)) \
&& (GetNextSign(_iCurrentLogID, _CSZPChannelID, _iKaKouMode) > 0))
{
iRet = 3;
}
else if((GetPreSign(_iCurrentLogID, _CSZPChannelID, _iKaKouMode) > 0) \
&& (GetNextSign(_iCurrentLogID, _CSZPChannelID, _iKaKouMode) > 0))
{
iRet = 4;
}
}
catch(sql::SQLException& e)
{
pthread_mutex_unlock(&m_DBLock);
// cpLog( LOG_ERR, "CLS_DBManage::HasCurrentLog error:%s", e.what());
RepairInsertErr(e.what());
StartDataBase(g_strDatabaseName);
return -1;
}
return iRet;
}
haltwang 2013-01-23
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楼主断点调试，找出死的地方，把相关代码上出来吧
jinjianxinxh 2013-01-23
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正解，曾经碰到过这类问题，花了三天时间
morris88 2013-01-22
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找找什么地方出现了野指针吧？
jinjianxinxh 2013-01-22
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多调试调试 找找规律 总会找到的，如果是单线程的估计好一点，如果是多线程的楼主就慢慢找吧
自强不息00001 2013-01-22
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程序出现错误概率比较小，每次出现都要很长时间。能给一些调试的建议吗？
jinjianxinxh 2013-01-22
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这种错误只能多调试，找规律了 指着别人找到错误是不可能的
自强不息00001 2013-01-22
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没有人帮忙看下么
