Example to keep track of CallStack and how to print

yalovali

With QT, this is a selective approach what to print in output.

ccallstack.h

`#define CALLSTACK CCallStack c(QDateTime::currentDateTime(),__FILE__,__LINE__,__FUNCTION__,"")
#define CALLSTACK2(comment) CCallStack c(QDateTime::currentDateTime(),__FILE__,__LINE__,__FUNCTION__,comment)
/**************************************************/
class CCallStack
{
    private:
        QString FunctionName;
        static QStringList Stack;
    public:
        CCallStack(QDateTime date,cstr file,int line,cstr functionName,cstr comment);
        CCallStack(cstr functionName);
        ~CCallStack();
        static void print();
};

`

ccallstack.cpp

 #include "ccallstack.h"
QStringList CCallStack::Stack;

CCallStack::CCallStack(QDateTime date,cstr file,int line,cstr functionName,cstr comment)
{
    QString s =
        QString("%1 file://%2:%3\033[35m %4\033[0m \033[34m:%5").arg(date.toString("HH:mm:ss:zzz")).arg(file).arg(
                line).arg(
                functionName).arg(comment);
    FunctionName = s;
    Stack.append(s);
}

CCallStack::CCallStack(cstr functionName):
    FunctionName(functionName)
{
    Stack.append(functionName);
}

CCallStack::~CCallStack()
{
    QString lastName = Stack.last();
    if (lastName!=FunctionName)
    {
        qWarning() << "There is a thread or Event Order conflict.";
        print();
    }
    Stack.removeLast();
}
void CCallStack::print()
{
    int index = 0;
    qDebug().nospace().noquote() << "STACKTRACE OUTPUT Stack Count:" << Stack.count();
    foreach(QString name,Stack)
    {
        qDebug().nospace().noquote() << index << ":" << name;
        index++;
    }
    qDebug().nospace().noquote() << "END OF STACKTRACE OUTPUT";
}

usage:
register a function using:

foo (){
   CALLSTACK
   ...
}

or

CALLSTACK2("this is a function to trace");

Then just call like:

CException::CException(cstr err):
{
    CCallStack::print();
}

outputs:

STACKTRACE OUTPUT Stack Count:6
0:09:18:26:505 file://..\main_app\entities\cdesktopsession.cpp:1034 CDesktopSession::sl_updateTimer_triggerred :
1:09:18:26:505 file://..\main_app\entities\cdesktopentity.cpp:161 CDesktopEntity::processTimeTick :Freeze_Frame_Index_Number
2:09:18:26:505 file://..\main_app\entities\cdesktopfield.cpp:154 CDesktopField::updateEntity :Freeze_Frame_Index_Number
3:09:18:26:505 file://..\main_app\entities\cdesktopa2lsinglevalue.cpp:299 CDesktopA2LSingleValue::getA2LValue :Freeze_Frame_Index_Number
4:09:18:26:505 file://..\main_app\device\ccandevicexcp.cpp:302 CCanDeviceXCP::requestAddressValue_internal :
5:09:18:26:505 file://..\main_app\device\ccandevice.cpp:72 CCanDevice::sendFrame_internal :
END OF STACKTRACE OUTPUT

Simple and usefull...