How to get every virtual function index just as the compiler does?

Question

Is there some plugin or tool which can read a .h file (or simply modify Intellisense itself) and spit out every function and it's virtual function table index? There's a pattern which I have yet to figure out having to do with polymorphism, and it gets 5x harder when you start to have 5 classes or more deriving from each other. No matter what, though, the MSVC++ compiler always spits out the correct virtual function table index when it compiles the virtual function call from C++ to Assembly. There has to be a better way to get that index without loading, break-pointing, reading the offset, and rewriting the code, right?

Thanks!

Answer 1

You could try writing a hack that determines it for you - this is implementation defined, but you can usually find a pointer to the virtual function table at the beginning of class memory. If you follow to this table there'll be a list of function pointers in memory (but you won't know how many). However, by searching for the functions you know about in the table of function pointers, you could identify its index.

Answer 2

Use the hidden Microsoft C/C++ compiler option "/d1 reportAllClassLayout". This will print out the memory layout and vtables of all your classes.