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Is there a secret to making vbtables look good in Hex-Rays? This is the best I can come up with, and an example decompiled call. I can just about read it (call second vftable entry on SubClass1, __thiscall with one param), but is there a cleaner way?pic.twitter.com/G64QyU5VA7
Just to clarify, I'm talking about vbtables (virtual base tables) not vftables (virtual function tables). vbtables are how the compiler implements virtual inheritance, here is an excellent summary from @IgorSkochinsky (pp. 6-8) https://www.hexblog.com/wp-content/uploads/2011/08/Recon-2011-Skochinsky.pdf …
It was pointed out to me privately that you can mark the offset as a offset into the vftable ('t' in Hex-Rays), then you can get this->http://base.data [this->base.__vbtable->SubClass1_idx] + offsetof(SubClass1_vtbl, MethodName))(...). It's a *little* easier to read. 
The lesson seems to be that you should use virtual inheritance in your DRM scheme or malware, because basically no reversers will know how to analyze the virtual base tables 
Unfortunately our decompiler does have special support for virtual inheritance. We will implement it one day but not ETA yet
Thanks Ilfak. It's pretty impressive with some union tricks you can still make something readable, even without special support!
have you tried hiding the casts? 
Maybe some HR plugin to detect and transform to more simple construct? I've seen similar things done in HR plugins by others, haven't written it myself tho.
I think it might be the only way. Might be an interesting project, I've only written IDA plugins, never a Hex-Rays one!
Yes. Step 1: Highlight the entire vtable in linear view and right click. Select "create struct" or "make struct" or whatever it's called
Step 2: Rename the resulting struct type "MyClass_vtbl"
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