Re: [Valgrind-developers] Re: Bypassing valgrind-supplied malloc() ?

[Nicholas N. <nj...@ca...>]

On 27 Mar 2003, Tom Hughes wrote:

> > but it wouldn't work for, say, memcpy(), because there is no
> > __libc_memcpy() alternative name to call the original version (AFAIK).
> > But you can effectively wrap memcpy() by instrumenting the function's
> > entry, and it's what you have to do currently anyway.
>
> You can find it using dlsym though, either like this:
>
>    dlsym(RTLD_NEXT, "memcpy")
>
> which requires you to define _GNU_SOURCE to get RTLD_NEXT, or by
> doing a dlopen of libc.so and then using dlsym on that handle.

Except Valgrind doesn't use glibc at all.  Maybe such a search wouldn't be
too hard to write from scratch, I don't know.

N