Greetings all,

Anyone here managed to get C++ applications to run in OllyDbg once analysed? When hitting F9 the target bails with an exception - 'Access violation: No RTTI data!'

Anyone had this problem and got round it? It's a great debugger which I'd like to use exclusively but can't if I can't reverse apps written in C++ (er, quite a few ;-)

Regards

Santa Clawz

I think close to 99% of all apps I use Olly on are C++ (VC++ specificly).

It's not a C++ thing, but rather a protection thing. What you are seeing is the detection of Olly and the application getting pissed. More than likely, it was counting on something to catch the debug event and fill in required information.

What you should try first, to test your feeling it's olly, is to run the app under VC++ (load the exe into VC++, it'll complain you don't have debug info but run anyway). One can guarentee that VC++ *does* handle C++, so if it doesn't run, you can then know it's not that Olly somehow forgot how to deal with the most popular language in existance.

Cheers for the reply but unfortunately I do not have VC++! I use Dev-Cpp (I come from a Linux background so this works well for me!). I can disassemble the target OK. I have no other debuggers to test it with. Actually saying that, I did download microsofts debugger and it seemed to run OK in that. Although I hate that debugger so I removed it.

Are there any configuration options I may have that will procude this error? What are yours like?

Santa Clawz

You should go to and seek help there...hxxp://ollydbg.win32asmcommunity.net/

Point of note, there is no RTTI in vanilla C/C++ (apart from basic typecasting when building code). Normally some 3rd party lib is used that provides it, such as Boost (iirc).

Do you really think I havn't tried that!!? Huh.

nice attitude, your post on olly forum is dated after your first post here and after babar0ga's reply.

Well that is odd then, I thought I posted that about 2 weeks ago. I re-posted it today yes, and also sent an E-mail to the author about a week ago so don't take me for some
unintuitive luser that can't be bothered to do their homework or at least try google or the webpage where they got the app. My attitude may have been a little hostile because I get sick of people posting replies like that, although I do sympathise - I know there are people who are out there who just want YOU to do THEIR work for them.

Plus, I'm having a bad day!

Regards

Santa Clawz