Re: [PATCH v2] tests/tcg: Skip failing ppc64 multi-threaded tests

["Nicholas Piggin" <npiggin@gmail.com>]

On Fri Jul 26, 2024 at 7:11 PM AEST, Thomas Huth wrote:
> On 25/07/2024 17.40, Nicholas Piggin wrote:
> > In Gitlab CI, some ppc64 multi-threaded tcg tests crash when run in the
> > clang-user job with an assertion failure in glibc that seems to
> > indicate corruption:
> > 
> >    signals: allocatestack.c:223: allocate_stack:
> >      Assertion `powerof2 (pagesize_m1 + 1)' failed.
> > 
> > Disable these tests for now.
> > 
> > Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
> > ---
> >   tests/tcg/ppc64/Makefile.target | 12 ++++++++++++
> >   1 file changed, 12 insertions(+)
> > 
> > diff --git a/tests/tcg/ppc64/Makefile.target b/tests/tcg/ppc64/Makefile.target
> > index 8c3e4e4038..509a20be2b 100644
> > --- a/tests/tcg/ppc64/Makefile.target
> > +++ b/tests/tcg/ppc64/Makefile.target
> > @@ -11,6 +11,18 @@ config-cc.mak: Makefile
> >   
> >   -include config-cc.mak
> >   
> > +# multi-threaded tests are known to fail (e.g., clang-user CI job)
> > +# See: https://gitlab.com/qemu-project/qemu/-/issues/2456
> > +run-signals: signals
> > +	$(call skip-test, $<, "BROKEN (flaky with clang) ")
> > +run-plugin-signals-with-%:
> > +	$(call skip-test, $<, "BROKEN (flaky with clang) ")
> > +
> > +run-threadcount: threadcount
> > +	$(call skip-test, $<, "BROKEN (flaky with clang) ")
> > +run-plugin-threadcount-with-%:
> > +	$(call skip-test, $<, "BROKEN (flaky with clang) ")
> > +
> >   ifneq ($(CROSS_CC_HAS_POWER8_VECTOR),)
> >   PPC64_TESTS=bcdsub non_signalling_xscv
> >   endif
>
> Could you please check whether this is already fixed by Richard's patch:
>
>   https://gitlab.com/qemu-project/qemu/-/commit/8e466dd092469e5ab0f355775c57
>
> ?

No, doesn't seem to unfortunately. Here is the same fail -

https://gitlab.com/npiggin/qemu/-/jobs/7436325582

I did build it with clang and using the same sanitize flags on
my local system, and could not reproduce. So not sure.

I might try run the clang-user without any sanitize flags.

I sent this patch with ppc pull request already, I think we
just do that for now to get clang-user passing. Simple enough
to revert once fixed.

Thanks,
Nick