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List:       fedora-devel-list
Subject:    Re: Fedora 32 System-Wide Change proposal: Build Python 3 to statically link with libpython3.8.a for
From:       Florian Weimer <fweimer () redhat ! com>
Date:       2019-11-18 8:33:45
Message-ID: 87y2wd60t2.fsf () oldenburg2 ! str ! redhat ! com
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* John Reiser:

>>>> Thinking aloud: does anyone ever use symbol overriding for anything
>>>> other than glibc?
>
>>> Yes.  It is particularly useful for "spear fishing" debugging of lower-level
>>> interfaces in large, complex multi-process applications.
>
>> That only seems to need shallow interposition, though.  In most cases, I
>> doubt you are interested in API calls from the library self because
>> those are probably unproblematic.
>
> One actual case: why exp(600.0) ?  Yes, the first use of overriding
> was shallow and libm (part of glibc).  But the caller was deep within
> a scientific library, and the second overriding was not shallow at
> all.

That's still unaffected.  What I meant is that you can still alter calls
at library boundaries.  Only purely internal calls are gone.

Thanks,
Florian
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