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

Gabriel F. T. Gomes gabriel@inconstante.net.br
Thu Dec 26 20:21:00 GMT 2019


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.

>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.



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