1. Forum
  2. Usenet
  3. COMP.SOFT-SYS.ACE

  • Unhandled exception (Access violation) while creating object of class i

    From Prasad Bhadakwan@21:1/5 to All on Wed Jan 11 02:48:33 2017
    Hi All,

    I want to dynamically load the client dll in my C++ Windows application. So I am using ACE_DLL. I want to create the object of the class in client dll in my application .
    So I have written a wrapper class. One of its member function creates the object of ACE_DLL.
    Then using that object I am loading the client dll. Next I am calling the symbol function through ACE_DLL object and passing the mangled name of constructor of the class in client dll. Next I am calling the function pointer (_entry ) which contains
    address of the constructor but this time I am getting error as "Unhandled exception (Access violation)"

    Please let me know if my approach is correct. Below are the calling sequence in my application.

    ----------------------------------------------
    ACE_DLL* _pDll;
    typedef Test* (*TestFP)();
    TestFP _entry;

    ----------------------------------------------
    _pDll = new ACE_DLL();

    _pDll->open("dllname_to_be_opend");

    std::string sSymbol = "Test"; // mangled name of the Test class constructor in client dll

    _entry = (TestFP) _pDll->symbol(sSymbol.c_str());

    Test *obj = _entry(); // Unhandled exception at 0x00362b2f in Testdll.exe: 0xC0000005: Access violation writing location 0x00362b0c.

    ----------------------------------------------

    Thank you,
    Prasad

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)