Yes, there's a bunch of common implementations which use it, like (Debian packages) eatmydata, fakeroot, datefudge, substitute mallocs. (One implementation of)

Yes, there's a bunch of common implementations which use it, like (Debian packages) eatmydata, fakeroot, datefudge, substitute mallocs. (One implementation of) fakeroot spawns a demon. Oh, and if you have something statically linked, so LD_PRELOAD is useless, the usual subversion tool is dyninst.