Re: [PATCH v3 bpf-next 7/7] selftests/bpf: add trace_vprintk test prog

On Fri, Aug 27, 2021 at 10:20 PM Dave Marchevsky [off-list ref] wrote:

This commit adds a test prog for vprintk which confirms that:
  * bpf_trace_vprintk is writing to dmesg
  * __bpf_vprintk macro works as expected
  * >3 args are printed

Approach and code are borrowed from trace_printk test.

Signed-off-by: Dave Marchevsky <redacted>
---

LGTM.

Acked-by: Andrii Nakryiko <andrii@kernel.org>

 tools/testing/selftests/bpf/Makefile          |  3 +-
 .../selftests/bpf/prog_tests/trace_vprintk.c  | 65 +++++++++++++++++++
 .../selftests/bpf/progs/trace_vprintk.c       | 25 +++++++
 3 files changed, 92 insertions(+), 1 deletion(-)
 create mode 100644 tools/testing/selftests/bpf/prog_tests/trace_vprintk.c
 create mode 100644 tools/testing/selftests/bpf/progs/trace_vprintk.c

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