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[108.214.96.168]) by smtp.gmail.com with ESMTPSA id 586e51a60fabf-4157d34a224sm13053927fac.17.2026.02.25.03.15.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 25 Feb 2026 03:15:34 -0800 (PST) From: Sun Jian To: Shuah Khan , Jakub Kicinski Cc: linux-kselftest@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Kees Cook , "David S . Miller" , Eric Dumazet , Paolo Abeni , Simon Horman , Sun Jian Subject: [PATCH v3 v3 1/2] selftests/harness: order TEST_F and XFAIL_ADD constructors Date: Wed, 25 Feb 2026 19:14:50 +0800 Message-ID: <20260225111451.347923-1-sun.jian.kdev@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit TEST_F() allocates and registers its struct __test_metadata via mmap() inside its constructor, and only then assigns the _##fixture_##test##_object pointer. XFAIL_ADD() runs in a constructor too and reads _##fixture_##test##_object to initialize xfail->test. If XFAIL_ADD runs first, xfail->test can be NULL and the expected failure will be reported as FAIL. Use constructor priorities to ensure TEST_F registration runs before XFAIL_ADD, without adding extra state or runtime lookups. Fixes: 2709473c9386 ("selftests: kselftest_harness: support using xfail") Signed-off-by: Sun Jian --- v3: - Move KSELFTEST_PRIO_* definitions above the TEST_SIGNAL() kdoc block. v2: - Drop the lazy string-matching approach. - Use constructor priorities to enforce initialization order. Link: https://lore.kernel.org/all/20260224113859.12345-1-sun.jian.kdev@gmail.com/ v1: Link: https://lore.kernel.org/all/20260222111846.12345-1-sun.jian.kdev@gmail.com/ --- tools/testing/selftests/kselftest_harness.h | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h index 16a119a4656c..4afaef01c22e 100644 --- a/tools/testing/selftests/kselftest_harness.h +++ b/tools/testing/selftests/kselftest_harness.h @@ -76,6 +76,9 @@ static inline void __kselftest_memset_safe(void *s, int c, size_t n) memset(s, c, n); } +#define KSELFTEST_PRIO_TEST_F 20000 +#define KSELFTEST_PRIO_XFAIL 20001 + #define TEST_TIMEOUT_DEFAULT 30 /* Utilities exposed to the test definitions */ @@ -465,7 +468,7 @@ static inline void __kselftest_memset_safe(void *s, int c, size_t n) fixture_name##_teardown(_metadata, self, variant); \ } \ static struct __test_metadata *_##fixture_name##_##test_name##_object; \ - static void __attribute__((constructor)) \ + static void __attribute__((constructor(KSELFTEST_PRIO_TEST_F))) \ _register_##fixture_name##_##test_name(void) \ { \ struct __test_metadata *object = mmap(NULL, sizeof(*object), \ @@ -880,7 +883,7 @@ struct __test_xfail { .fixture = &_##fixture_name##_fixture_object, \ .variant = &_##fixture_name##_##variant_name##_object, \ }; \ - static void __attribute__((constructor)) \ + static void __attribute__((constructor(KSELFTEST_PRIO_XFAIL))) \ _register_##fixture_name##_##variant_name##_##test_name##_xfail(void) \ { \ _##fixture_name##_##variant_name##_##test_name##_xfail.test = \ base-commit: 7dff99b354601dd01829e1511711846e04340a69 -- 2.43.0