From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brendan Higgins Subject: [PATCH v6 2/5] kunit: test: create a single centralized executor for all tests Date: Tue, 4 Aug 2020 13:47:42 -0700 Message-ID: <20200804204745.987648-3-brendanhiggins@google.com> References: <20200804204745.987648-1-brendanhiggins@google.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Return-path: Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59234 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728124AbgHDUr5 (ORCPT ); Tue, 4 Aug 2020 16:47:57 -0400 Received: from mail-pj1-x1049.google.com (mail-pj1-x1049.google.com [IPv6:2607:f8b0:4864:20::1049]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3EE8BC06179F for ; Tue, 4 Aug 2020 13:47:57 -0700 (PDT) Received: by mail-pj1-x1049.google.com with SMTP id gl22so871764pjb.3 for ; Tue, 04 Aug 2020 13:47:57 -0700 (PDT) In-Reply-To: <20200804204745.987648-1-brendanhiggins@google.com> Sender: linux-arch-owner@vger.kernel.org List-ID: To: jdike@addtoit.com, richard@nod.at, anton.ivanov@cambridgegreys.com, arnd@arndb.de, keescook@chromium.org, skhan@linuxfoundation.org, alan.maguire@oracle.com, yzaikin@google.com, davidgow@google.com, akpm@linux-foundation.org, rppt@linux.ibm.com, frowand.list@gmail.com Cc: gregkh@linuxfoundation.org, sboyd@kernel.org, logang@deltatee.com, mcgrof@kernel.org, linux-arch@vger.kernel.org, linux-kselftest@vger.kernel.org, kunit-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, Brendan Higgins From: Alan Maguire Add a centralized executor to dispatch tests rather than relying on late_initcall to schedule each test suite separately. Centralized execution is for built-in tests only; modules will execute tests when loaded. Signed-off-by: Alan Maguire Co-developed-by: Iurii Zaikin Signed-off-by: Iurii Zaikin Co-developed-by: Brendan Higgins Signed-off-by: Brendan Higgins Reviewed-by: Stephen Boyd Reviewed-by: Kees Cook --- include/kunit/test.h | 67 +++++++++++++++++++++++++++++--------------- lib/kunit/Makefile | 3 +- lib/kunit/executor.c | 28 ++++++++++++++++++ lib/kunit/test.c | 2 +- 4 files changed, 76 insertions(+), 24 deletions(-) create mode 100644 lib/kunit/executor.c diff --git a/include/kunit/test.h b/include/kunit/test.h index 47e61e1d53370..f3e86c3953a2b 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -224,7 +224,7 @@ size_t kunit_suite_num_test_cases(struct kunit_suite *suite); unsigned int kunit_test_case_num(struct kunit_suite *suite, struct kunit_case *test_case); -int __kunit_test_suites_init(struct kunit_suite **suites); +int __kunit_test_suites_init(struct kunit_suite * const * const suites); void __kunit_test_suites_exit(struct kunit_suite **suites); @@ -237,34 +237,57 @@ void __kunit_test_suites_exit(struct kunit_suite **suites); * Registers @suites_list with the test framework. See &struct kunit_suite for * more information. * - * When builtin, KUnit tests are all run as late_initcalls; this means - * that they cannot test anything where tests must run at a different init - * phase. One significant restriction resulting from this is that KUnit - * cannot reliably test anything that is initialize in the late_init phase; - * another is that KUnit is useless to test things that need to be run in - * an earlier init phase. - * - * An alternative is to build the tests as a module. Because modules - * do not support multiple late_initcall()s, we need to initialize an - * array of suites for a module. - * - * TODO(brendanhiggins@google.com): Don't run all KUnit tests as - * late_initcalls. I have some future work planned to dispatch all KUnit - * tests from the same place, and at the very least to do so after - * everything else is definitely initialized. + * If a test suite is built-in, module_init() gets translated into + * an initcall which we don't want as the idea is that for builtins + * the executor will manage execution. So ensure we do not define + * module_{init|exit} functions for the builtin case when registering + * suites via kunit_test_suites() below. */ -#define kunit_test_suites(suites_list...) \ - static struct kunit_suite *suites[] = {suites_list, NULL}; \ - static int kunit_test_suites_init(void) \ +#ifdef MODULE +#define kunit_test_suites_for_module(__suites) \ + static int __init kunit_test_suites_init(void) \ { \ - return __kunit_test_suites_init(suites); \ + return __kunit_test_suites_init(__suites); \ } \ - late_initcall(kunit_test_suites_init); \ + module_init(kunit_test_suites_init); \ + \ static void __exit kunit_test_suites_exit(void) \ { \ - return __kunit_test_suites_exit(suites); \ + return __kunit_test_suites_exit(__suites); \ } \ module_exit(kunit_test_suites_exit) +#else +#define kunit_test_suites_for_module(__suites) +#endif /* MODULE */ + +#define __kunit_test_suites(unique_array, unique_suites, ...) \ + static struct kunit_suite *unique_array[] = { __VA_ARGS__, NULL }; \ + kunit_test_suites_for_module(unique_array); \ + static struct kunit_suite **unique_suites \ + __used __section(.kunit_test_suites) = unique_array + +/** + * kunit_test_suites() - used to register one or more &struct kunit_suite + * with KUnit. + * + * @suites: a statically allocated list of &struct kunit_suite. + * + * Registers @suites with the test framework. See &struct kunit_suite for + * more information. + * + * When builtin, KUnit tests are all run via executor; this is done + * by placing the array of struct kunit_suite * in the .kunit_test_suites + * ELF section. + * + * An alternative is to build the tests as a module. Because modules do not + * support multiple initcall()s, we need to initialize an array of suites for a + * module. + * + */ +#define kunit_test_suites(...) \ + __kunit_test_suites(__UNIQUE_ID(array), \ + __UNIQUE_ID(suites), \ + __VA_ARGS__) #define kunit_test_suite(suite) kunit_test_suites(&suite) diff --git a/lib/kunit/Makefile b/lib/kunit/Makefile index 724b94311ca36..c49f4ffb6273a 100644 --- a/lib/kunit/Makefile +++ b/lib/kunit/Makefile @@ -3,7 +3,8 @@ obj-$(CONFIG_KUNIT) += kunit.o kunit-objs += test.o \ string-stream.o \ assert.o \ - try-catch.o + try-catch.o \ + executor.o ifeq ($(CONFIG_KUNIT_DEBUGFS),y) kunit-objs += debugfs.o diff --git a/lib/kunit/executor.c b/lib/kunit/executor.c new file mode 100644 index 0000000000000..7015e7328dce7 --- /dev/null +++ b/lib/kunit/executor.c @@ -0,0 +1,28 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include + +/* + * These symbols point to the .kunit_test_suites section and are defined in + * include/asm-generic/vmlinux.lds.h, and consequently must be extern. + */ +extern struct kunit_suite * const * const __kunit_suites_start[]; +extern struct kunit_suite * const * const __kunit_suites_end[]; + +#if IS_BUILTIN(CONFIG_KUNIT) + +static int kunit_run_all_tests(void) +{ + struct kunit_suite * const * const *suites; + + for (suites = __kunit_suites_start; + suites < __kunit_suites_end; + suites++) + __kunit_test_suites_init(*suites); + + return 0; +} + +late_initcall(kunit_run_all_tests); + +#endif /* IS_BUILTIN(CONFIG_KUNIT) */ diff --git a/lib/kunit/test.c b/lib/kunit/test.c index ccb2ffad8dcfa..918dff400a9d7 100644 --- a/lib/kunit/test.c +++ b/lib/kunit/test.c @@ -380,7 +380,7 @@ static void kunit_init_suite(struct kunit_suite *suite) kunit_debugfs_create_suite(suite); } -int __kunit_test_suites_init(struct kunit_suite **suites) +int __kunit_test_suites_init(struct kunit_suite * const * const suites) { unsigned int i; -- 2.28.0.163.g6104cc2f0b6-goog