[LLVMdev] Instrumenting virtual function calls

[Chris Lattner]

On Feb 12, 2008, at 5:08 PM, Robert Zeh wrote:

> After hacking away at it for a bit, it looks like the mystery function
> is actually a stub function.  The function pointer is coming from a
> vtable, which gets filled in with pointers to stub functions.
>
> Is there any way to do the round trip for a stub function?  Two
> possible solutions come to mind:
> 	1) Modify getGlobalValueAtAddress to work for pointers to stub
> functions
> 	2) Add a getStubAtAddress
>
> Any other suggestions?

Do you care about JIT laziness?  You could just call  
getPointerToFunction on every function in the module before your code  
starts up.

-Chris