Unconditionally share _metadata between all forked processes, which enables to actually catch errors which were previously ignored. This is required for a following commit replacing vfork() with clone3() and CLONE_VFORK (i.e. not sharing the full memory) . It should also be useful to share _metadata to extend expectations to test process's forks. For instance, this change identified a wrong expectation in pidfd_setns_test. Because this _metadata is used by the new XFAIL_ADD(), use a global pointer initialized in TEST_F(). This is OK because only XFAIL_ADD() use it, and XFAIL_ADD() already depends on TEST_F(). Cc: Jakub Kicinski <kuba@xxxxxxxxxx> Cc: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx> Cc: Will Drewry <wad@xxxxxxxxxxxx> Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx> Signed-off-by: Mickaël Salaün <mic@xxxxxxxxxxx> Link: https://lore.kernel.org/r/20240511171445.904356-9-mic@xxxxxxxxxxx --- Changes since v6: * Use a global pointer per TEST_F() and complete build of the __test_xfail object in the xfail constructor to fix XFAIL_ADD(): https://lore.kernel.org/r/202405100339.vfBe0t9C-lkp@xxxxxxxxx/ Changes since v4: * Reset _metadata's aborted and setup_completed fields. Changes since v1: * Extract change from a bigger patch (suggested by Kees). --- tools/testing/selftests/kselftest_harness.h | 26 ++++++++++++--------- 1 file changed, 15 insertions(+), 11 deletions(-) diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h index 201040207c85..28415798fa60 100644 --- a/tools/testing/selftests/kselftest_harness.h +++ b/tools/testing/selftests/kselftest_harness.h @@ -430,19 +430,19 @@ static inline pid_t clone3_vfork(void) kill(getpid(), WTERMSIG(status)); \ __test_check_assert(_metadata); \ } \ - static struct __test_metadata \ - _##fixture_name##_##test_name##_object = { \ - .name = #test_name, \ - .fn = &wrapper_##fixture_name##_##test_name, \ - .fixture = &_##fixture_name##_fixture_object, \ - .termsig = signal, \ - .timeout = tmout, \ - .teardown_parent = false, \ - }; \ + static struct __test_metadata *_##fixture_name##_##test_name##_object; \ static void __attribute__((constructor)) \ _register_##fixture_name##_##test_name(void) \ { \ - __register_test(&_##fixture_name##_##test_name##_object); \ + struct __test_metadata *object = mmap(NULL, sizeof(*object), \ + PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, -1, 0); \ + object->name = #test_name; \ + object->fn = &wrapper_##fixture_name##_##test_name; \ + object->fixture = &_##fixture_name##_fixture_object; \ + object->termsig = signal; \ + object->timeout = tmout; \ + _##fixture_name##_##test_name##_object = object; \ + __register_test(object); \ } \ static void fixture_name##_##test_name( \ struct __test_metadata __attribute__((unused)) *_metadata, \ @@ -850,11 +850,12 @@ struct __test_xfail { { \ .fixture = &_##fixture_name##_fixture_object, \ .variant = &_##fixture_name##_##variant_name##_object, \ - .test = &_##fixture_name##_##test_name##_object, \ }; \ static void __attribute__((constructor)) \ _register_##fixture_name##_##variant_name##_##test_name##_xfail(void) \ { \ + _##fixture_name##_##variant_name##_##test_name##_xfail.test = \ + _##fixture_name##_##test_name##_object; \ __register_xfail(&_##fixture_name##_##variant_name##_##test_name##_xfail); \ } @@ -1181,6 +1182,9 @@ void __run_test(struct __fixture_metadata *f, /* reset test struct */ t->exit_code = KSFT_PASS; t->trigger = 0; + t->aborted = false; + t->setup_completed = false; + memset(t->env, 0, sizeof(t->env)); memset(t->results->reason, 0, sizeof(t->results->reason)); if (asprintf(&test_name, "%s%s%s.%s", f->name, -- 2.45.0
