[Bug dynamic-link/30134] DT_AUDIT is ignored for dlopen()ed solib

["stsp at users dot sourceforge.net" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=30134

--- Comment #17 from Stas Sergeev <stsp at users dot sourceforge.net> ---
Ah, I see your point.
So basically you mean, while DT_AUDIT
can well be supported for dlopen() right
now, it may be slightly inconsistent with
la_premap, as it would just skip it.

Well, for my use-case this is definitely
not a problem because my use-case is only
applying auditing to dlmem(), not dlopen().
dlmem() is done later by the dlopen()'ed
plugin. So for my case its perfectly fine.

Whether it is a generic consistency problem
or not, is hard to tell, as currently there
is no la_premap so we can't take a look at
how dl_main() would have supported it, be
it there. :) But I do share your concern,
especially since there was once that
LD_PREFER_MAP_32BIT_EXE thing that likely
didn't skip any objects. So if we are
modelling that, then la_premap is something
to think about for the implementer of
DT_AUDIT support for dlopen().

But please note one more thing.
I started dlload_audit_module() exactly
because I am not a big believer in DT_AUDIT
for dlopen(). DT_AUDIT for dlopen() is just
an "escape" scenario. So maybe if we get
dlload_audit_module() in, we can just close
this?

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