_penter function causes acces violation when using /Gh

Question

Hi!

I'm trying to instrument a multithreaded program using the /Gh compiler option, but I ran into this interesting error. I wrote a simple DLL based on the Interceptor library from PrakaramJoshi, but when atexit() is called Access Violation Exception is thrown in _peneter.

I made a small code to reproduce the problem, here are my remarks:

• The problem occurs when the instrumented program uses static global variables.
• When compiling for debug the problem does not occur.
• When choosing /EHs exception handling model the problem does not occur with global mutex.
• But with /EHs and a global std::vector it is.

This is my project:
Interceptor-Access_Violation

I think this has something to do with static initialization. So my question is how should I solve this problem? Is there any other approach to dodge this?

Answer 1

Probably it tries executing some unloaded or uninitialised code. If you are not interested in _penter that are invoked during finalisation, you can apply this workaround:

int main( )
{
   . . .
   __declspec( dllimport ) bool exiting;
   exiting = true;

   return 0;
}

In Interceptor.h:

__declspec( dllexport ) bool exiting = false;

extern"C" void on_enter( const void* pa )
{
   if( exiting ) return;

   . . .
}