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authorDavid Gow <davidgow@google.com>2024-04-23 12:08:06 +0300
committerShuah Khan <skhan@linuxfoundation.org>2024-05-06 23:22:02 +0300
commit4b513a02fd052ad65566db31ba64ea5ee2ba1ce9 (patch)
treec8b79fcc6a344a324593380bf4d4e748aa3ad7d6 /lib
parentfabd480b721eb30aa4e2c89507b53933069f9f6e (diff)
downloadlinux-4b513a02fd052ad65566db31ba64ea5ee2ba1ce9.tar.xz
kunit: test: Move fault tests behind KUNIT_FAULT_TEST Kconfig option
The NULL dereference tests in kunit_fault deliberately trigger a kernel BUG(), and therefore print the associated stack trace, even when the test passes. This is both annoying (as it bloats the test output), and can confuse some test harnesses, which assume any BUG() is a failure. Allow these tests to be specifically disabled (without disabling all of KUnit's other tests), by placing them behind the CONFIG_KUNIT_FAULT_TEST Kconfig option. This is enabled by default, but can be set to 'n' to disable the test. An empty 'kunit_fault' suite is left behind, which will automatically be marked 'skipped'. As the fault tests already were disabled under UML (as they weren't compatible with its fault handling), we can simply adapt those conditions, and add a dependency on !UML for our new option. Suggested-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/all/928249cc-e027-4f7f-b43f-502f99a1ea63@roeck-us.net/ Fixes: 82b0beff3497 ("kunit: Add tests for fault") Signed-off-by: David Gow <davidgow@google.com> Reviewed-by: Mickaël Salaün <mic@digikod.net> Reviewed-by: Rae Moar <rmoar@google.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Diffstat (limited to 'lib')
-rw-r--r--lib/kunit/Kconfig11
-rw-r--r--lib/kunit/kunit-test.c8
2 files changed, 15 insertions, 4 deletions
diff --git a/lib/kunit/Kconfig b/lib/kunit/Kconfig
index 68a6daec0aef..34d7242d526d 100644
--- a/lib/kunit/Kconfig
+++ b/lib/kunit/Kconfig
@@ -24,6 +24,17 @@ config KUNIT_DEBUGFS
test suite, which allow users to see results of the last test suite
run that occurred.
+config KUNIT_FAULT_TEST
+ bool "Enable KUnit tests which print BUG stacktraces"
+ depends on KUNIT_TEST
+ depends on !UML
+ default y
+ help
+ Enables fault handling tests for the KUnit framework. These tests may
+ trigger a kernel BUG(), and the associated stack trace, even when they
+ pass. If this conflicts with your test infrastrcture (or is confusing
+ or annoying), they can be disabled by setting this to N.
+
config KUNIT_TEST
tristate "KUnit test for KUnit" if !KUNIT_ALL_TESTS
default KUNIT_ALL_TESTS
diff --git a/lib/kunit/kunit-test.c b/lib/kunit/kunit-test.c
index 0fdca5fffaec..e3412e0ca399 100644
--- a/lib/kunit/kunit-test.c
+++ b/lib/kunit/kunit-test.c
@@ -109,7 +109,7 @@ static struct kunit_suite kunit_try_catch_test_suite = {
.test_cases = kunit_try_catch_test_cases,
};
-#ifndef CONFIG_UML
+#if IS_ENABLED(CONFIG_KUNIT_FAULT_TEST)
static void kunit_test_null_dereference(void *data)
{
@@ -136,12 +136,12 @@ static void kunit_test_fault_null_dereference(struct kunit *test)
KUNIT_EXPECT_TRUE(test, ctx->function_called);
}
-#endif /* !CONFIG_UML */
+#endif /* CONFIG_KUNIT_FAULT_TEST */
static struct kunit_case kunit_fault_test_cases[] = {
-#ifndef CONFIG_UML
+#if IS_ENABLED(CONFIG_KUNIT_FAULT_TEST)
KUNIT_CASE(kunit_test_fault_null_dereference),
-#endif /* !CONFIG_UML */
+#endif /* CONFIG_KUNIT_FAULT_TEST */
{}
};