From: Guenter Roeck <linux@roeck-us.net>
To: linux-kselftest@vger.kernel.org
Cc: loongarch@lists.linux.dev, linux-doc@vger.kernel.org,
dri-devel@lists.freedesktop.org,
"Brendan Higgins" <brendan.higgins@linux.dev>,
linux-riscv@lists.infradead.org,
"David Airlie" <airlied@gmail.com>,
"Arthur Grillo" <arthurgrillo@riseup.net>,
"Ville Syrjälä" <ville.syrjala@linux.intel.com>,
linux-arch@vger.kernel.org, linux-s390@vger.kernel.org,
"Daniel Diaz" <daniel.diaz@linaro.org>,
linux-sh@vger.kernel.org,
"Naresh Kamboju" <naresh.kamboju@linaro.org>,
"Maíra Canal" <mcanal@igalia.com>,
"Dan Carpenter" <dan.carpenter@linaro.org>,
"Linux Kernel Functional Testing" <lkft@linaro.org>,
"Guenter Roeck" <linux@roeck-us.net>,
"Kees Cook" <keescook@chromium.org>,
"Arnd Bergmann" <arnd@arndb.de>,
"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
"Maxime Ripard" <mripard@kernel.org>,
"David Gow" <davidgow@google.com>,
"Daniel Vetter" <daniel@ffwll.ch>,
linux-arm-kernel@lists.infradead.org, kunit-dev@googlegroups.com,
linux-parisc@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org,
"Thomas Zimmermann" <tzimmermann@suse.de>,
"Andrew Morton" <akpm@linux-foundation.org>,
linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v2 04/14] kunit: Add documentation for warning backtrace suppression API
Date: Mon, 25 Mar 2024 10:52:38 -0700 [thread overview]
Message-ID: <20240325175248.1499046-5-linux@roeck-us.net> (raw)
In-Reply-To: <20240325175248.1499046-1-linux@roeck-us.net>
Document API functions for suppressing warning backtraces.
Tested-by: Linux Kernel Functional Testing <lkft@linaro.org>
Acked-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
- Rebased to v6.9-rc1
- Added Tested-by:, Acked-by:, and Reviewed-by: tags
Documentation/dev-tools/kunit/usage.rst | 30 ++++++++++++++++++++++++-
1 file changed, 29 insertions(+), 1 deletion(-)
diff --git a/Documentation/dev-tools/kunit/usage.rst b/Documentation/dev-tools/kunit/usage.rst
index 22955d56b379..8d3d36d4103d 100644
--- a/Documentation/dev-tools/kunit/usage.rst
+++ b/Documentation/dev-tools/kunit/usage.rst
@@ -157,6 +157,34 @@ Alternatively, one can take full control over the error message by using
if (some_setup_function())
KUNIT_FAIL(test, "Failed to setup thing for testing");
+Suppressing warning backtraces
+------------------------------
+
+Some unit tests trigger warning backtraces either intentionally or as side
+effect. Such backtraces are normally undesirable since they distract from
+the actual test and may result in the impression that there is a problem.
+
+Such backtraces can be suppressed. To suppress a backtrace in some_function(),
+use the following code.
+
+.. code-block:: c
+
+ static void some_test(struct kunit *test)
+ {
+ DEFINE_SUPPRESSED_WARNING(some_function);
+
+ START_SUPPRESSED_WARNING(some_function);
+ trigger_backtrace();
+ END_SUPPRESSED_WARNING(some_function);
+ }
+
+SUPPRESSED_WARNING_COUNT() returns the number of suppressed backtraces. If the
+suppressed backtrace was triggered on purpose, this can be used to check if
+the backtrace was actually triggered.
+
+.. code-block:: c
+
+ KUNIT_EXPECT_EQ(test, SUPPRESSED_WARNING_COUNT(some_function), 1);
Test Suites
~~~~~~~~~~~
@@ -857,4 +885,4 @@ For example:
dev_managed_string = devm_kstrdup(fake_device, "Hello, World!");
// Everything is cleaned up automatically when the test ends.
- }
\ No newline at end of file
+ }
--
2.39.2
next prev parent reply other threads:[~2024-03-25 17:56 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-25 17:52 [PATCH v2 00/14] Add support for suppressing warning backtraces Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 01/14] bug/kunit: Core " Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 02/14] kunit: bug: Count suppressed " Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 03/14] kunit: Add test cases for backtrace warning suppression Guenter Roeck
2024-03-25 17:52 ` Guenter Roeck [this message]
2024-03-25 17:52 ` [PATCH v2 05/14] drm: Suppress intentional warning backtraces in scaling unit tests Guenter Roeck
2024-03-25 19:05 ` Maíra Canal
2024-03-25 19:24 ` Guenter Roeck
2024-03-26 1:09 ` Maíra Canal
2024-03-26 5:02 ` Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 06/14] net: kunit: Suppress lock warning noise at end of dev_addr_lists tests Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 07/14] x86: Add support for suppressing warning backtraces Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 08/14] arm64: " Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 09/14] loongarch: " Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 10/14] parisc: " Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 11/14] s390: " Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 12/14] sh: " Guenter Roeck
2024-03-27 14:44 ` Simon Horman
2024-03-27 15:10 ` Guenter Roeck
2024-03-27 19:39 ` Simon Horman
2024-03-29 15:40 ` Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 13/14] riscv: " Guenter Roeck
2024-03-25 17:52 ` [PATCH v2 14/14] powerpc: " Guenter Roeck
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