Question

I am using Visual Leak Detector to detect memory leaks in my program. When the program has finished running, I get an assertion triggered by the following code in utility.cpp. When Visual Leak Detector’s header is excluded from the program, the program runs and exits without incident.

// Get the *real* address of the import. If we find this address in the IAT,
// then we've found that the module does import the named import.
import = GetProcAddress(exportmodule, importname);
assert(import != NULL); // Perhaps the named export module does not actually export the named import?

I am not sure why the assert is being triggered. Does anybody have an idea in what scenarios the assertion can be triggered?

Thanks

Answer 1

I am using ogre3d + vld and I get same issue!
I debugged the error code with GetLastError():
ERROR_PROC_NOT_FOUND, error 127: The specified procedure could not be found.

The good thing is, that it works(tested with “new char[20]”) if you comment out that assertation and recompile,
but if you forget to call “delete Ogre::Root::getSingletonPtr();” it wont be detected 🙁

Edit: To report assertations to the debug console you can use this:

        // Get the *real* address of the import.
    import = GetProcAddress(exportmodule, importname);

    if(import == NULL){
        DWORD err=GetLastError(); 
        WCHAR buff[2048];
        wcsncpy_s(buff, 2048, L"\n============================================\nImport name: ", _TRUNCATE);
        int i=wcslen(buff);
        int n=0;
        //cast to unicode
        while(importname[n]){
            buff[i++]=importname[n++];
        }
        buff[i]=0;
        wcsncat_s(buff, 2048, L"\nExport module: ", _TRUNCATE);
        i=wcslen(buff);
        GetModuleFileName(exportmodule,&buff[i],2048-i);
        wcsncat_s(buff, 2048, L"\nError code: ", _TRUNCATE);
        i=wcslen(buff);
        _itow_s(err,&buff[i],2048-i,10);
        wcsncat_s(buff, 2048, L"\n============================================\n", _TRUNCATE);
        report(buff);
    }
    //assert(import != NULL); // Perhaps the named export module does not actually export the named import?

Result will be:

============================================
Import name: CoGetMalloc
Export module: C:\data\projects\Avenon\trunk\source\..\build\Avenon_d.exe
Error code: 127
============================================

============================================
Import name: CoTaskMemAlloc
Export module: C:\data\projects\Avenon\trunk\source\..\build\Avenon_d.exe
Error code: 127
============================================

============================================
Import name: CoTaskMemRealloc
Export module: C:\data\projects\Avenon\trunk\source\..\build\Avenon_d.exe
Error code: 127
============================================