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From: "mark at klomp dot org" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug default/26591] detect pathologically redundant types in abixml
Date: Fri, 03 Dec 2021 09:38:47 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D26591

Mark Wielaard <mark at klomp dot org> changed:

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

--- Comment #12 from Mark Wielaard <mark at klomp dot org> ---
(In reply to Matthias Maennich from comment #11)
> We came across this as we were digging into an unrelated issue.
>=20
> The duplicate types mentioned in comment 6 appear to correlate to
> DW_AT_signature (part of DWARF 4 type units - see
> https://dwarfstd.org/ShowIssue.php?issue=3D080930.1). The test files
> that make use of this feature are:
>=20
> tests/data/test-read-dwarf/test15-pr18892.so - GCC 4.9.2
> tests/data/test-read-dwarf/libtest23.so - GCC 4.8.5
> tests/data/test-read-dwarf/PR22122-libftdc.so - Clang 3.9.1
>=20
> abidw gets incomplete type information as a result.

Is there a specific bug for handling debug_types?

libdw should handle these just fine without the program even needing to know
about the different section type. dwarf_formref_die () will return a Dwarf_=
Die
however the attribute refers to it (if it uses a signature then that gets
looked up internally by libdw).

--=20
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