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From: "fche at redhat dot com" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug symtab/17547] over-eager debuginfo reading
Date: Tue, 25 May 2021 19:50:06 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D17547

--- Comment #5 from Frank Ch. Eigler <fche at redhat dot com> ---
(In reply to Simon Marchi from comment #4)
> GDB goes through the DWARF info of all code objects to build some name in=
dex
> (partial symtabs), such that if you type "break foo", it can quickly know
> which compilation units contain a function or method called foo.

Understood, that's the sort of thing that appears to require program-wide
debuginfo data of some sort.  But something like=20

% gdb /bin/gnome-control-centre
(gdb) run
^C
(gdb) bt

doesn't seem to.


> The solution to avoid that is to use an index (DWARF4 .gdb_index, or DWAR=
F5
> .debug_names).  Then, if debuginfod offered that, I could imagine GDB just
> downloading the index section [...]

Yes, that seems plausible, assuming it's a savings, perhaps latency being m=
ost
important.  Depending on one's luck, it could be that transferring the whole
file would not take much longer than extracting the index only and transfer=
ring
that.

--=20
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