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POC++ : Getting function virtual 'address' with member function pointer
 

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  1. POC++ : Getting function virtual 'address' with member function pointer
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    <p>This question is similar to <a href="https://stackoverflow.com/questions/3068144/print-address-of-virtual-member-function">Print address of virtual member function</a></p> <p>I would like to retrieve the memory location of a function (in runtime), using a member function pointer. The goal is to log them, and do a post-mortem analysis, using 'ln' in WinDbg to retrieve which function it was, using PDB symbols.</p> <p>I can't use stack walking since I am not yet into the function I want to log. (and I do not want to modify billions of functions to return me their address...).</p> <p>Short sample:</p> <pre><code>class AClass { public : virtual AFunction(){;} }; typedef void (AClass::*FxPtr)( void ); [...] AClass oAClass; AClass* pSelf = &amp;oAClass; FxPtr pf = &amp;AClass::AFunction; DWORD nFctAddress = ??? </code></pre> <p>Anyone has an idea how I can retrieve the address ?</p> <pre><code>&amp;(pSelf-&gt;*pf) </code></pre> <p>gives 'error C2298: '&amp;' : illegal operation on pointer to member function expression'</p> <p>I know that member function pointers are 'weird' structures, but since I know the 'this', is there a way to look-up the potentially virtual function from the vtable ?</p> <p>Regards,</p> <p>refs: </p> <ul> <li><a href="http://www.codeproject.com/kb/cpp/FastDelegate.aspx" rel="nofollow noreferrer">Member Function Pointers</a></li> <li><a href="http://blogs.msdn.com/b/oldnewthing/archive/2004/02/09/70002.aspx" rel="nofollow noreferrer">Pointers to member functions are very strange animals</a></li> </ul>
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