Re: [PATCH bpf-next v3 17/17] selftests/bpf: Add tests for BPF exceptions

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On Wed, Sep 13, 2023 at 5:14 PM Puranjay Mohan <puranjay12@xxxxxxxxx> wrote:
>
> On Wed, Sep 13 2023, Kumar Kartikeya Dwivedi wrote:
>
> Hi,
>
> > Add selftests to cover success and failure cases of API usage, runtime
> > behavior and invariants that need to be maintained for implementation
> > correctness.
> >
> > Signed-off-by: Kumar Kartikeya Dwivedi <memxor@xxxxxxxxx>
> > ---
> >  tools/testing/selftests/bpf/DENYLIST.aarch64  |   1 +
> >  tools/testing/selftests/bpf/DENYLIST.s390x    |   1 +
> >  .../selftests/bpf/prog_tests/exceptions.c     | 408 ++++++++++++++++++
> >  .../testing/selftests/bpf/progs/exceptions.c  | 368 ++++++++++++++++
> >  .../selftests/bpf/progs/exceptions_assert.c   | 135 ++++++
> >  .../selftests/bpf/progs/exceptions_ext.c      |  72 ++++
> >  .../selftests/bpf/progs/exceptions_fail.c     | 347 +++++++++++++++
> >  7 files changed, 1332 insertions(+)
> >  create mode 100644 tools/testing/selftests/bpf/prog_tests/exceptions.c
> >  create mode 100644 tools/testing/selftests/bpf/progs/exceptions.c
> >  create mode 100644 tools/testing/selftests/bpf/progs/exceptions_assert.c
> >  create mode 100644 tools/testing/selftests/bpf/progs/exceptions_ext.c
> >  create mode 100644 tools/testing/selftests/bpf/progs/exceptions_fail.c
> >
> > diff --git a/tools/testing/selftests/bpf/DENYLIST.aarch64 b/tools/testing/selftests/bpf/DENYLIST.aarch64
> > index 7f768d335698..f5065576cae9 100644
> > --- a/tools/testing/selftests/bpf/DENYLIST.aarch64
> > +++ b/tools/testing/selftests/bpf/DENYLIST.aarch64
> > @@ -1,5 +1,6 @@
> >  bpf_cookie/multi_kprobe_attach_api               # kprobe_multi_link_api_subtest:FAIL:fentry_raw_skel_load unexpected error: -3
> >  bpf_cookie/multi_kprobe_link_api                 # kprobe_multi_link_api_subtest:FAIL:fentry_raw_skel_load unexpected error: -3
> > +exceptions                                    # JIT does not support calling kfunc bpf_throw: -524
>
> I think you forgot to drop this.
> exceptions work on aarch64 with this: https://lore.kernel.org/bpf/20230912233942.6734-1-puranjay12@xxxxxxxxx/

Sorry for the noise. I realised that my patch should remove this from
the DENYLIST.

> Thanks,
> Puranjay





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