[PATCH bpf-next 0/3] selftests/bpf: Fix prog_tests framework self-tests

[KaFai Wan]

Three prog_tests framework self-tests fail depending on how test_progs
is invoked:

- ./test_progs -t prog_tests_framework/test_fail -v
  test_prog_tests_framework:FAIL:skip_cnt_check
  unexpected skip_cnt_check: actual 0 != expected 2

- ./test_progs -t prog_tests_framework_expected_msgs -v
  Caught signal #11!
  Stack trace:
  ./test_progs(crash_handler+0x38)[0x55620006fbb0]

- ./test_progs -t prog_tests_framework_compare_text -v
  test_prog_tests_framework_compare_text:PASS:mismatch_rc 0 nsec
  Caught signal #11!
  Stack trace:
  ./test_progs(crash_handler+0x38)[0x564ddbfcfbb0]

Patch #1 counts the subtests that actually ran, so the skip and error
count checks no longer fail when -t or -n filters out some subtests.

Patches #2 and #3 skip the subtests that inspect the log buffer when the
output is not captured, such as with -v in non-parallel mode, instead of
crashing on a NULL log_buf.

---
KaFai Wan (3):
  selftests/bpf: Fix prog_tests framework subtest count checks
  selftests/bpf: Skip expected_msgs subtests when stdout is not saved
  selftests/bpf: Skip compare_text subtest when stdout is not saved

 .../bpf/prog_tests/prog_tests_framework.c     | 34 ++++++++++++++-----
 1 file changed, 25 insertions(+), 9 deletions(-)

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2.43.0