Re: dwfl_thread_getframes: no matching address range

[Kurt Roeckx <kurt at roeckx dot be>]

On Sun, Dec 27, 2015 at 03:16:48AM +0100, Mark Wielaard wrote:
> On Sat, Dec 26, 2015 at 11:46:50PM +0100, Kurt Roeckx wrote:
> > I finally uploaded the 0.164 version to Debian, but it's failing
> > in the test suite on most arches with an error message like:
> > dwfl_thread_getframes: no matching address range
> > 
> > You can see a full log here:
> > https://buildd.debian.org/status/fetch.php?pkg=elfutils&arch=powerpc&ver=0.164-1&stamp=1451167794
> 
> That is strange indeed. Especially since a somewhat similar test
> run-backtrace-native.sh does seem to succeed. The output seems to
> indicate that we cannot find the unwind (.eh_frame CFI) for raise
> in this case. But there is not enough info to know for sure.
> 
> Does the same test with 0.163 succeed on the same setup/arch?
> If not, did glibc change between the last successful run and
> the current failure on that architecture?

I didn't see that failure with 0.163.  The last 0.163 upload was
using glibc 2.19-19, the current version is 2.21-6.

> You probably need access to a failing setup to debug a bit.
> Most interesting would be to see whether or not the glibc.so
> has CFI for raise and which addresses that covers.
> $ eu-readelf --debug-dump=frame /lib/libc.so.6 | grep -4 '<raise>'
> should give you a hint.

That just returns:
eu-readelf: cannot get debug context descriptor: No DWARF information found

(I get that message on working systems too.)

Without the grep it does return all kind of information, just
nothing about raise.  Both with a 2.19 and 2.21 libc6.so.


Kurt