Unfortunately, I can't give you much information, but I believe this is possible (at least on UNIX/Linux). I've seen something similar done for memory profilers (malloc and free would be overridden by custom versions in a shared library). The way it worked more or less (as near as I can remember anyway) is that there were special versions of functions that were to be overridden in a shared library, and the runtime linker was told to load this library before any others using (maybe) the LD_PRELOAD variable or something like that. That way, the function calls would resolve to those defined in this special library. Unfortunately, I don't remember much beyond that, and I could be remembering things wrong. However, the important point is that I believe you can in fact override functions at runtime. However, this is not going to be the forum to get a complete answer, since I believe it has nothing to do with the compiler, but rather with the runtime linker. You might try a binutils list or something similar. Also look at the man page for "ld.so". Good luck, Lyle -----Original Message----- From: gcc-help-owner@xxxxxxxxxxx [mailto:gcc-help-owner@xxxxxxxxxxx] On Behalf Of Shriram V Sent: Monday, July 05, 2004 7:14 AM To: gcc-help@xxxxxxxxxxx Subject: Debugging C++ using instrumentation. Hi Gurus, I was wondering if there is a method that allows a call to an arbitrary function to be intercepted and replaced by a new function at runtime / compile-time / link-time. <SNIP>
