From: "Mickaël Salaün" <mic@digikod.net>
To: Christian Brauner <brauner@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jakub Kicinski <kuba@kernel.org>,
Kees Cook <keescook@chromium.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Mark Brown <broonie@kernel.org>, Sasha Levin <sashal@kernel.org>,
Sean Christopherson <seanjc@google.com>,
Shengyu Li <shengyu.li.evgeny@gmail.com>,
Shuah Khan <shuah@kernel.org>,
Shuah Khan <skhan@linuxfoundation.org>
Cc: "Mickaël Salaün" <mic@digikod.net>,
"Bagas Sanjaya" <bagasdotme@gmail.com>,
"Brendan Higgins" <brendanhiggins@google.com>,
"David Gow" <davidgow@google.com>,
"David S . Miller" <davem@davemloft.net>,
"Florian Fainelli" <florian.fainelli@broadcom.com>,
"Günther Noack" <gnoack@google.com>,
"Jon Hunter" <jonathanh@nvidia.com>, "Ron Economos" <re@w6rz.net>,
"Ronald Warsow" <rwarsow@gmx.de>,
"Stephen Rothwell" <sfr@canb.auug.org.au>,
"Will Drewry" <wad@chromium.org>,
"kernel test robot" <oliver.sang@intel.com>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-kselftest@vger.kernel.org, netdev@vger.kernel.org,
stable@vger.kernel.org
Subject: [PATCH v6 03/10] selftests/harness: Fix fixture teardown
Date: Mon, 6 May 2024 18:55:11 +0200 [thread overview]
Message-ID: <20240506165518.474504-4-mic@digikod.net> (raw)
In-Reply-To: <20240506165518.474504-1-mic@digikod.net>
Make sure fixture teardowns are run when test cases failed, including
when _metadata->teardown_parent is set to true.
Make sure only one fixture teardown is run per test case, handling the
case where the test child forks.
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Shengyu Li <shengyu.li.evgeny@gmail.com>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Fixes: 72d7cb5c190b ("selftests/harness: Prevent infinite loop due to Assert in FIXTURE_TEARDOWN")
Fixes: 0710a1a73fb4 ("selftests/harness: Merge TEST_F_FORK() into TEST_F()")
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Link: https://lore.kernel.org/r/20240506165518.474504-4-mic@digikod.net
---
tools/testing/selftests/kselftest_harness.h | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h
index d98702b6955d..55699a762c45 100644
--- a/tools/testing/selftests/kselftest_harness.h
+++ b/tools/testing/selftests/kselftest_harness.h
@@ -382,7 +382,10 @@
FIXTURE_DATA(fixture_name) self; \
pid_t child = 1; \
int status = 0; \
- bool jmp = false; \
+ /* Makes sure there is only one teardown, even when child forks again. */ \
+ bool *teardown = mmap(NULL, sizeof(*teardown), \
+ PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, -1, 0); \
+ *teardown = false; \
memset(&self, 0, sizeof(FIXTURE_DATA(fixture_name))); \
if (setjmp(_metadata->env) == 0) { \
/* Use the same _metadata. */ \
@@ -399,15 +402,16 @@
_metadata->exit_code = KSFT_FAIL; \
} \
} \
- else \
- jmp = true; \
if (child == 0) { \
- if (_metadata->setup_completed && !_metadata->teardown_parent && !jmp) \
+ if (_metadata->setup_completed && !_metadata->teardown_parent && \
+ __sync_bool_compare_and_swap(teardown, false, true)) \
fixture_name##_teardown(_metadata, &self, variant->data); \
_exit(0); \
} \
- if (_metadata->setup_completed && _metadata->teardown_parent) \
+ if (_metadata->setup_completed && _metadata->teardown_parent && \
+ __sync_bool_compare_and_swap(teardown, false, true)) \
fixture_name##_teardown(_metadata, &self, variant->data); \
+ munmap(teardown, sizeof(*teardown)); \
if (!WIFEXITED(status) && WIFSIGNALED(status)) \
/* Forward signal to __wait_for_test(). */ \
kill(getpid(), WTERMSIG(status)); \
--
2.45.0
next prev parent reply other threads:[~2024-05-06 16:55 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-06 16:55 [PATCH v6 00/10] Fix Kselftest's vfork() side effects Mickaël Salaün
2024-05-06 16:55 ` [PATCH v6 01/10] selftests/pidfd: Fix config for pidfd_setns_test Mickaël Salaün
2024-05-06 16:55 ` [PATCH v6 02/10] selftests/landlock: Fix FS tests when run on a private mount point Mickaël Salaün
2024-05-06 16:55 ` Mickaël Salaün [this message]
2024-05-06 16:55 ` [PATCH v6 04/10] selftests/harness: Fix interleaved scheduling leading to race conditions Mickaël Salaün
2024-05-06 16:55 ` [PATCH v6 05/10] selftests/landlock: Do not allocate memory in fixture data Mickaël Salaün
2024-05-06 16:55 ` [PATCH v6 06/10] selftests/harness: Constify fixture variants Mickaël Salaün
2024-05-06 16:55 ` [PATCH v6 07/10] selftests/pidfd: Fix wrong expectation Mickaël Salaün
2024-05-06 16:55 ` [PATCH v6 08/10] selftests/harness: Share _metadata between forked processes Mickaël Salaün
2024-05-06 16:55 ` [PATCH v6 09/10] selftests/harness: Fix vfork() side effects Mickaël Salaün
2024-05-06 16:55 ` [PATCH v6 10/10] selftests/harness: Handle TEST_F()'s explicit exit codes Mickaël Salaün
2024-05-06 17:04 ` [PATCH v6 00/10] Fix Kselftest's vfork() side effects Kees Cook
2024-05-07 14:12 ` Sean Christopherson
2024-05-07 15:42 ` Mickaël Salaün
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