Debugging containerized glibc tests with gdb (a developer use case for outside-of-container debugging).

Carlos O'Donell carlos@redhat.com
Fri Dec 27 12:13:00 GMT 2019


On 12/26/19 3:21 PM, Gabriel F. T. Gomes wrote:
> Hi, Carlos,
> 
> I tried this on several systems (varying archs and distros), but I wasn't
> able to reproduce it (with elf/tst-ldconfig-bad-aux-cache)...
> 
> On Fri, 20 Dec 2019, Carlos O'Donell wrote:
> 
>> GNU gdb (GDB) Fedora 8.3-7.fc30
>> [...]
>> This GDB was configured as "x86_64-redhat-linux-gnu".
> 
> ... even on Fedora 30 for x86_64, so I'm wondering if there's anything in
> your configure options that I should try and mimic (I already tried some
> combinations of --enable-profile --enable-addons --enable-multi-arch
> --enable-tunables --enable-stack-protector=all, but I only tried that with
> the system compiler (gcc (GCC) 9.2.1 20190827 (Red Hat 9.2.1-1)).
> 
>> warning: Could not load shared library symbols for /home/carlos/build/glibc-gr-localedef/elf/ld.so.
> 
> I never got this.

Did you try --enable-hardcoded-path-in-tests?

>> warning: Unable to find dynamic linker breakpoint function.
> 
> Nor this.
> 
>> warning: Target and debugger are in different PID namespaces; thread lists and other data are likely unreliable.  Connect to gdbserver inside the container.
> 
> But this one, I got, too.
> 


-- 
Cheers,
Carlos.



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