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From: "mark at klomp dot org" <sourceware-bugzilla@sourceware.org>
To: elfutils-devel@sourceware.org
Subject: [Bug debuginfod/29022] 000-permissions files cause problems for
 backups
Date: Mon, 04 Apr 2022 22:08:04 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29022

Mark Wielaard <mark at klomp dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mark at klomp dot org

--- Comment #2 from Mark Wielaard <mark at klomp dot org> ---
Theoretically you can have a totally empty source files, but they are pretty
useless and they won't even leave any debug (DWARF) data (except for an emp=
ty
line table and compiler options string), so since there is no DWARF referen=
ce
to the source file it won't even be requested by any debuginfod consumer.
executables and debug files are ELF so are never zero size.

So I think it might make some sense to investigate whether we can use the f=
act
that a file is zero size as negative cache indicator. It would also get rid=
 of
the "root is special" case.

At least I cannot imagine we really want to ever return a zero sized file. =
But
I might not have big enough imagination. There is always some theoretically
possibility that there is a legitimate request for a zero sized file in the
future. But do we really need to worry about that? Does it prevent some fut=
ure
extensions?

--=20
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