My application is having issue with Windows Vista

Posted on 2008-06-23
Last Modified: 2013-11-20
I have multithreaded MFC application that uses secure socket. The application is running perfectly in XP. But abruptly crashes in Vista (though not always). It crashes when the application calls SSL_library_init. The stack trace shows this crashes at realloc/malloc deep within the SSL_library_init function. The weird thing about this issue is that I can only reproduce in release binary, never in debug or using some tool like boundschecker.
This made be think that this is a timing issue and I added two seconds delay before SSL_library_init, the issue disappeared. Suspecting the previous running instance has not released the socket, I observed the use of socket, but that doesnt looks likely.

I would like to get to the root of it and not able to get the lead. This application is not using more than 22MB, since its known that WIN32 only gets 32MB to work on Vista.
Question by:shuklasunil
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LVL 49

Expert Comment

ID: 21854008
SSL_library_init must be called (and return :-) before *any* other OpenSSL functions.  Is there a chance that some worker thread or something is assuming that it has already been called?

Author Comment

ID: 21864820
Than why doesn't it crashes when I add two seconds delay before SSL_library_init. In that case this other thread, that we think, calls OpenSSL before SSL_library_init in more likely be excuted before.

Also if I comment  SSL_library_init the code never crashes.
LVL 49

Expert Comment

ID: 21869879
I can't think of anything obvious.  
Are you using the latest version of OpneSSL?  After all, Vista is a relatively new OS... if bugs relating to it exist, they would be fixed onnly in recent versions.
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Author Comment

ID: 21897629
I am using OpenSSL and I am having issue even with the latest version
LVL 49

Expert Comment

ID: 21903117
The main reason that a Release build fails while a Debug build works is that some variable or buffer is not being initialized in code (the Debug version presets them to defined values).  So check all variables that you are passinging into the OpenSSL functions.

Author Comment

ID: 22024804
Ok I am using the workaround of sleeping for few second.

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