Hello,

we are developing an application in a virtual-vm-ware on linux/debian. when i debug the application on the virtual-vm-ware it works really good an nothing bad happens.

but when i compile the programm (arm-linux-gnueabi-g++) there are very strange problems now.

here is the last problem what i got, when i debug on the device with gdb:

Qt Code: 
  1. Program received signal SIGSEGV, Segmentation fault. 
  2. [Switching to Thread 0x4178a460 (LWP 534)] 
  4. from /usr/local/packages/qt-armel-qvfb-4.7.1/lib/libQtNetwork.so.4 
  5. (gdb) bt 
  6. #0 0x4015dd7c in QNetworkInterface::QNetworkInterface(QNetworkInterface const&) () 
  7. from /usr/local/packages/qt-armel-qvfb-4.7.1/lib/libQtNetwork.so.4 
  8. #1 0x0003a350 in cNetworkThread::run() () 
  9. #2 0x40222b90 in ?? () from /usr/local/packages/qt-armel-qvfb-4.7.1/lib/libQtCore.so.4 
  10. #3 0x40222b90 in ?? () from /usr/local/packages/qt-armel-qvfb-4.7.1/lib/libQtCore.so.4 
  11. Backtrace stopped: previous frame identical to this frame (corrupt stack?) 
  12. (gdb) info frame 
  13. Stack level 0, frame at 0x41789c48: 
  15. saved pc 0x3a350 
  16. called by frame at 0x41789ca8 
  17. Arglist at 0x41789c38, args: 
  18. Locals at 0x41789c38, Previous frame's sp is 0x41789c48 
  19. Saved registers: 
  20. r4 at 0x41789c38, r5 at 0x41789c3c, r6 at 0x41789c40, lr at 0x41789c44 
  21. (gdb) info stack 
  22. #0 0x4015dd7c in QNetworkInterface::QNetworkInterface(QNetworkInterface const&) () 
  23. from /usr/local/packages/qt-armel-qvfb-4.7.1/lib/libQtNetwork.so.4 
  24. #1 0x0003a350 in cNetworkThread::run() () 
  25. #2 0x40222b90 in ?? () from /usr/local/packages/qt-armel-qvfb-4.7.1/lib/libQtCore.so.4 
  26. #3 0x40222b90 in ?? () from /usr/local/packages/qt-armel-qvfb-4.7.1/lib/libQtCore.so.4 
  27. Backtrace stopped: previous frame identical to this frame (corrupt stack?) 
  28. (gdb) info bt 
  29. Undefined info command: "bt". Try "help info". 
  30. (gdb) bt 
  31. #0 0x4015dd7c in QNetworkInterface::QNetworkInterface(QNetworkInterface const&) () 
  32. from /usr/local/packages/qt-armel-qvfb-4.7.1/lib/libQtNetwork.so.4 
  33. #1 0x0003a350 in cNetworkThread::run() () 
  34. #2 0x40222b90 in ?? () from /usr/local/packages/qt-armel-qvfb-4.7.1/lib/libQtCore.so.4 
  35. #3 0x40222b90 in ?? () from /usr/local/packages/qt-armel-qvfb-4.7.1/lib/libQtCore.so.4 
  36. Backtrace stopped: previous frame identical to this frame (corrupt stack?)
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Here is my cNetworkThread.h:

Qt Code: 
  1. class cNetworkThread : public QThread 
  2. { 
  3.   Q_OBJECT 
  4.  
  5.   public: 
  6.  
  7.   explicit cNetworkThread(QObject *parent = 0); 
  8.   void run(); 
  9.  
  10. };
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and here is my .cpp:

Qt Code: 
  1. cNetworkThread::cNetworkThread(QObject *parent) : 
  2. QThread(parent) 
  3. { 
  4.   qDebug() << "Network-Thread Konstruktor"; 
  5.   qDebug() << "Network-Thread ID" << currentThreadId(); 
  6. } 
  7.  
  8. void cNetworkThread::run() 
  9. { 
  10.   qDebug() << "Network-Thread run-Methode" << currentThreadId(); 
  11.   while(true) 
  12.   { 
  13.     msleep(200); 
  14.     QList<QNetworkInterface> ifaces = QNetworkInterface::allInterfaces(); 
  15.  
  16.     for(int i = 0; i < ifaces.count(); i++) 
  17.     {  
  18.        msleep(200); 
  19.        QNetworkInterface iface = ifaces.at(i); 
  20.        QString interfaceName = ifaces[i].name(); 
  21.        if(interfaceName == "eth0") 
  22.        { 
  23.           if(iface.flags().testFlag(QNetworkInterface::IsRunning) && !iface.flags().testFlag(QNetworkInterface::IsLoopBack)) 
  24.           { 
  25.              // Connection still running 
  26.           } 
  27.           else 
  28.           { 
  29.              // Connection down 
  30.              cLedState::SetLED(LED_NETWORK); 
  31.           } 
  32.        } 
  33.     } 
  34.     ifaces.clear(); 
  35.   } 
  36. }
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do you have any idea what is going wrong?

i do also have some problems with "qt glibc detected corrupted double-linked list".

i hope you can help me with my problem!
attached you find my complete project!

kind regards