netdev - Re: [PATCH bpf-next 0/3] selftests/bpf: switch test

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Date:   Fri, 2 Aug 2019 20:00:24 +0000
From:   Andrii Nakryiko <andriin@...com>
To:     Stanislav Fomichev <sdf@...gle.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>
CC:     "davem@...emloft.net" <davem@...emloft.net>,
        "ast@...nel.org" <ast@...nel.org>,
        "daniel@...earbox.net" <daniel@...earbox.net>,
        "andrii.nakryiko@...il.com" <andrii.nakryiko@...il.com>
Subject: Re: [PATCH bpf-next 0/3] selftests/bpf: switch test_progs back to
 stdio


On 8/2/19 10:17 AM, Stanislav Fomichev wrote:
> I was looking into converting test_sockops* to test_progs framework
> and that requires using cgroup_helpers.c which rely on stdio/stderr.
> Let's use open_memstream to override stdout into buffer during
> subtests instead of custom test_{v,}printf wrappers. That lets
> us continue to use stdio in the subtests and dump it on failure
> if required.
>
> That would also fix bpf_find_map which currently uses printf to
> signal failure (missed during test_printf conversion).
I wonder if we should hijack stderr as well?
>
> Cc: Andrii Nakryiko <andriin@...com>
>
> Stanislav Fomichev (3):
>   selftests/bpf: test_progs: switch to open_memstream
>   selftests/bpf: test_progs: test__printf -> printf
>   selftests/bpf: test_progs: drop extra trailing tab
>
>  .../bpf/prog_tests/bpf_verif_scale.c          |   4 +-
>  .../selftests/bpf/prog_tests/l4lb_all.c       |   2 +-
>  .../selftests/bpf/prog_tests/map_lock.c       |  10 +-
>  .../selftests/bpf/prog_tests/send_signal.c    |   4 +-
>  .../selftests/bpf/prog_tests/spinlock.c       |   2 +-
>  .../bpf/prog_tests/stacktrace_build_id.c      |   4 +-
>  .../bpf/prog_tests/stacktrace_build_id_nmi.c  |   4 +-
>  .../selftests/bpf/prog_tests/xdp_noinline.c   |   4 +-
>  tools/testing/selftests/bpf/test_progs.c      | 116 +++++++-----------
>  tools/testing/selftests/bpf/test_progs.h      |  12 +-
>  10 files changed, 68 insertions(+), 94 deletions(-)
>