Roland> Please follow up on elfutils-devel(a)lists.fedorahosted.org about
Roland> If you have any more suggestions for checks, please post them to
Roland> elfutils-devel and we'll get them onto the TODO list.
Roland> Especially, if you have come across bad data emitted by GCC that is not
Roland> listed on SuspiciousDebuginfoCases, then let us know--and no less so if
Roland> GCC has already been fixed.
Here, I recommend simply searching for "GCC" in src/gdb/dwarf2read.c.
This will yield a number of PRs (some open, some closed) and other
Searching through the "debug" bugs in GCC bugzilla would also yield some
Some other things:
We saw cases in the wild where an arange entry was terminated early.
That is, the 0,0 entry occurred before the end of the particular
arange buffer. There is a bug, maybe closed, in Red Hat bugzilla for
Consider checking that every CU has an arange entry.
This is not strictly required, but it is nicer for consumers.
ISTR filing a bug about this in GCC bugzilla.
check_debug_pubnames / pubtypes
FWIW, GCC doesn't emit these any more. So, IMO anyway, they are not
very important to check. They were never all that usable in the first
But, if you want to check these, then check that they are complete and
In the past we noticed that names were not always fully qualified (I
forget if it was namespace- or class- qualification that GCC didn't do
properly). I'm sure I filed a GCC bug for this.
I've just merged in a branch that I've been working on last week.
dwarf_version table now knows about form and attribute classes, widths
and storage classes (value/block/string). More can come in future.
The consequence being that the switches that were testing for
DW_FORM_this and DW_AT_that are now expressed in terms of these classes,
which will hopefully make future expansions and general maintenance
easier. All features of forms and attributes are now defined in one
place, the code just follows suit.
Support for further DWARF standards and the GNU extension should be
quite clean under this setup. (The MIPS extension is already there,
though only DW_AT_MIPS_linkage_name can be considered tested in any
way.) Some compiler quirks (known-broken characteristics) might boil
down to defining given quirk as a separate extension to the DWARF standard.
DW_OP_ is not yet part of these tables.
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