linux-kernel - [PATCH 1/1] perf tests record: Fail the test if the errs counter is not zero

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Message-ID: <YzR0n5QhsH9VyYB0@kernel.org>
Date:   Wed, 28 Sep 2022 13:22:37 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ian Rogers <irogers@...gle.com>
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/1] perf tests record: Fail the test if the errs counter is
 not zero

We were just checking for the 'err' variable, when we should really see
if there was some of the many checked errors that don't stop the test
right away.

Detected with clang 15.0.0:

  44    75.23 fedora:37                     : FAIL clang version 15.0.0 (Fedora 15.0.0-2.fc37)

    tests/perf-record.c:68:16: error: variable 'errs' set but not used [-Werror,-Wunused-but-set-variable]
            int err = -1, errs = 0, i, wakeups = 0;
                          ^
    1 error generated.

The patch introducing this 'perf test' entry had that check:

  +       return (err < 0 || errs > 0) ? -1 : 0;

But at some point we lost that:

  -       return (err < 0 || errs > 0) ? -1 : 0;
  +       if (err == -EACCES)
  +               return TEST_SKIP;
  +       if (err < 0)
  +               return TEST_FAIL;
  +       return TEST_OK

Put it back.

Fixes: 2cf88f4614c996e5 ("perf test: Use skip in PERF_RECORD_*")
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Ian Rogers <irogers@...gle.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/tests/perf-record.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/tests/perf-record.c b/tools/perf/tests/perf-record.c
index 6a001fcfed68e517..4952abe716f318b0 100644
--- a/tools/perf/tests/perf-record.c
+++ b/tools/perf/tests/perf-record.c
@@ -332,7 +332,7 @@ static int test__PERF_RECORD(struct test_suite *test __maybe_unused, int subtest
 out:
 	if (err == -EACCES)
 		return TEST_SKIP;
-	if (err < 0)
+	if (err < 0 || errs != 0)
 		return TEST_FAIL;
 	return TEST_OK;
 }
-- 
2.37.3


----- End forwarded message -----

-- 

- Arnaldo