Re: [PATCH 1/7] tests/docker: add gdb-multiarch to all-test-cross

["Alex Bennée" <alex.bennee@linaro.org>]

Philippe Mathieu-Daudé <philmd@linaro.org> writes:

> On Thu, 12 Mar 2026 at 11:39, Philippe Mathieu-Daudé <philmd@linaro.org> wrote:
>>
>> On 12/3/26 11:11, Ilya Leoshkevich wrote:
>> >
>> > On 3/11/26 00:28, Philippe Mathieu-Daudé wrote:
>> >> On 11/3/26 00:22, Pierrick Bouvier wrote:
>> >>> On 3/10/26 4:07 PM, Philippe Mathieu-Daudé wrote:
>> >>>> On 10/3/26 23:33, Philippe Mathieu-Daudé wrote:
>> >>>>> On 6/3/26 17:17, Alex Bennée wrote:
>> >>>>>> This allows the gdb integration tests to be run as well.
>> >>>>>>
>> >>>>>> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
>> >>>>>> ---
>> >>>>>>    tests/docker/dockerfiles/debian-all-test-cross.docker | 1 +
>> >>>>>>    tests/lcitool/refresh                                 | 1 +
>> >>>>>>    2 files changed, 2 insertions(+)
>> >>>>>
>> >>>>> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
>> >>>>
>> >>>> I'm getting:
>> >>>>
>> >>>> Python Exception <class 'gdb.MemoryError'>: Cannot access memory at
>> >>>> address 0x45001fff
>> >>>> Error occurred in Python: Cannot access memory at address 0x45001fff
>> >>>> qemu-hppa: QEMU: Terminated via GDBstub
>> >>>> make[1]: ***
>> >>>> [/builds/philmd/qemu/tests/tcg/multiarch/Makefile.target:121:
>> >>>> run-gdbstub-prot-none] Error 1
>> >>>> make[1]: *** Waiting for unfinished jobs....
>> >>>> qemu-hppa: QEMU: Terminated via GDBstub
>> >>>> warning: Could not load shared library symbols for linux-vdso32.so.1.
>> >>>> Do you need "set solib-search-path" or "set sysroot"?
>> >>>> make: *** [/builds/philmd/qemu/tests/Makefile.include:66:
>> >>>> run-tcg-tests-hppa-linux-user] Error 2
>> >>>>
>> >>>
>> >>> To add more information, we tested it on GitHub, our machines and
>> >>> GitLab, and for an unknown reason, it only fails on GitLab runners.
>> >>
>> >> Also we tested on our local Linux machines, where this test pass
>> >> for all our targets ;)
>> >>
>> >>>
>> >>> Which is unfortunate since it is where QEMU run its CI.
>> >>>
>> >>> Regards,
>> >>> Pierrick
>> >>
>> > FWIW it passes on my laptop as well.
>> >
>> > Does this test fail only for hppa, or for other architectures as well?
>>
>> Have a look at these job failures:
>> https://gitlab.com/philmd/qemu/-/pipelines/2376819801
>>
>> Python Exception <class 'gdb.MemoryError'>: Cannot access memory at
>> address 0x7e085b4b1fff
>> Error occurred in Python: Cannot access memory at address 0x7e085b4b1fff
>> qemu-aarch64: QEMU: Terminated via GDBstub
>> make[1]: ***
>> [/builds/philmd/qemu/tests/tcg/multiarch/Makefile.target:121:
>> run-gdbstub-prot-none] Error 1
>> make: *** [/builds/philmd/qemu/tests/Makefile.include:66:
>> run-tcg-tests-aarch64-linux-user] Error 2
>>
>> Python Exception <class 'gdb.MemoryError'>: Cannot access memory at
>> address 0x40802fff
>> Error occurred in Python: Cannot access memory at address 0x40802fff
>> qemu-arm: QEMU: Terminated via GDBstub
>> make[1]: ***
>> [/builds/philmd/qemu/tests/tcg/multiarch/Makefile.target:121:
>> run-gdbstub-prot-none] Error 1
>> make[1]: *** Waiting for unfinished jobs....
>> make: *** [/builds/philmd/qemu/tests/Makefile.include:66:
>> run-tcg-tests-arm-linux-user] Error 2
>>
>> Python Exception <class 'gdb.MemoryError'>: Cannot access memory at
>> address 0x45001fff
>> Error occurred in Python: Cannot access memory at address 0x45001fff
>> qemu-hppa: QEMU: Terminated via GDBstub
>> make[1]: ***
>> [/builds/philmd/qemu/tests/tcg/multiarch/Makefile.target:121:
>> run-gdbstub-prot-none] Error 1
>> make[1]: *** Waiting for unfinished jobs....
>> qemu-hppa: QEMU: Terminated via GDBstub
>> make: *** [/builds/philmd/qemu/tests/Makefile.include:66:
>> run-tcg-tests-hppa-linux-user] Error 2
>>
>> Python Exception <class 'gdb.MemoryError'>: Cannot access memory at
>> address 0x7d742025efff
>> Error occurred in Python: Cannot access memory at address 0x7d742025efff
>> qemu-alpha: QEMU: Terminated via GDBstub
>> make[1]: ***
>> [/builds/philmd/qemu/tests/tcg/multiarch/Makefile.target:121:
>> run-gdbstub-prot-none] Error 1
>> make: *** [/builds/philmd/qemu/tests/Makefile.include:66:
>> run-tcg-tests-alpha-linux-user] Error 2
>>
>> So at least Alpha / ARM / Aarch64 / HPPA.
>>
>> (I haven't checked whether the test is run for other targets).
>>
>> We also run these on GitHub runners where the tests pass, and apparently
>> when running on k8s private runner on GitLab they also pass. The problem
>> is with public runner on GitLab.
>
> Also another test we ran was to pull GitLab docker image and run the same
> tests locally within that GitLab-generated image and they passed. So we
> believe the issue is related to some container restriction with
> GitLab.

Most likely because the ptrace settings are tighter - ptrace is the
mechanism we use to access the memory we can't normally.

>
>>
>> > I'm asking because it may have something to do with /proc/self/mem or
>> > with the architecture.
>> >
>>

-- 
Alex Bennée
Virtualisation Tech Lead @ Linaro