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Message-ID: <CABVgOSn=YtRsJx=JrBj1sXj9Pp0JM=NNi4yDHWapk+Unq253Jg@mail.gmail.com>
Date: Tue, 18 May 2021 14:14:55 +0800
From: David Gow <davidgow@...gle.com>
To: Daniel Latypov <dlatypov@...gle.com>
Cc: Kees Cook <keescook@...omium.org>,
Brendan Higgins <brendanhiggins@...gle.com>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
KUnit Development <kunit-dev@...glegroups.com>,
"open list:KERNEL SELFTEST FRAMEWORK"
<linux-kselftest@...r.kernel.org>,
Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH v2] lib/test: convert test_overflow.c to use KUnit
On Wed, May 12, 2021 at 6:05 AM Daniel Latypov <dlatypov@...gle.com> wrote:
>
> This largely consists of:
> * replacing `err |= test_func(...)` calls with `test_func(test, ...)`.
> * changing pr_warn to KUNIT_*_MSG() macros to mark the failed test
> while printing a diagnostic message
> * dropping __init as there are concerns of this causing issues w/ KUnit
> when running on some other arches.
>
> With the exception of now needing to set CONFIG_KUNIT=y, the test can
> still be run as before, at boot time or as a test module.
> But now the output of the test will be TAP (Test Anything Protocol),
> the format used by kselftest instead of just warnings and printing
> "FAIL!" , see [1].
>
> But now the test can also be run more quickly via kunit.py
>
> $ ./tools/testing/kunit/kunit.py run --kunitconfig /dev/stdin <<EOF
> CONFIG_KUNIT=y
> CONFIG_TEST_OVERFLOW=y
> EOF
>
> Note: after a mrproper this took
> > Elapsed time: 38.683s total, 3.598s configuring, 32.141s building, 0.000s running
>
> (Normally would be less clunky as you wouldn't use a heredoc).
>
> [1] Here's an example failure message after tweaking the test array:
> TAP version 14
> 1..1
> # Subtest: lib_overflow
> 1..10
> # test_u8_overflow: u8 : 18 arithmetic tests
> # test_u8_overflow: EXPECTATION FAILED at lib/test_overflow.c:251
> Expected _got == p->sum, but
> _got == 0
> p->sum == 1
> wrong result for 0 + 0 (type u8)
> ...
> not ok 1 - test_u8_overflow
> # test_s8_overflow: s8 : 19 arithmetic tests
> ok 2 - test_s8_overflow
> ...
> # test_overflow_shift: ok: (s32)(0 << 31) == 0
> # test_overflow_shift: ok: (s64)(0 << 63) == 0
> ok 9 - test_overflow_shift
>
> Signed-off-by: Daniel Latypov <dlatypov@...gle.com>
> Tested-by: David Gow <davidgow@...gle.com>
> --
> v1 -> v2:
> * Use kunit_info() instead of pr_info().
> * means messages are printed prefixed with "# test_name: "
> * Add in missing conversion to KUNIT_EXPECT_* macros
Thanks -- I much prefer this with the kunit_info() calls. Maybe
there's some future scope in kunit_tool for stripping out the "#
test_name: " prefix when printing logs, but personally, I like this
much better.
The use of KUNIT_EXPECT_ also makes the errors much cleaner, so thanks.
This is now:
Reviewed-by: David Gow <davidgow@...gle.com>
Cheers,
-- David
> ---
> lib/Kconfig.debug | 4 +-
> lib/test_overflow.c | 433 ++++++++++++++++++++------------------------
> 2 files changed, 196 insertions(+), 241 deletions(-)
>
> diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
> index 678c13967580..8e19ba9ac22c 100644
> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -2195,7 +2195,9 @@ config TEST_XARRAY
> tristate "Test the XArray code at runtime"
>
> config TEST_OVERFLOW
> - tristate "Test check_*_overflow() functions at runtime"
> + tristate "Test check_*_overflow() functions at runtime" if !KUNIT_ALL_TESTS
> + depends on KUNIT
> + default KUNIT_ALL_TESTS
>
> config TEST_RHASHTABLE
> tristate "Perform selftest on resizable hash table"
> diff --git a/lib/test_overflow.c b/lib/test_overflow.c
> index 7a4b6f6c5473..098339251908 100644
> --- a/lib/test_overflow.c
> +++ b/lib/test_overflow.c
> @@ -2,10 +2,9 @@
> /*
> * Test cases for arithmetic overflow checks.
> */
> -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
> +#include <kunit/test.h>
>
> #include <linux/device.h>
> -#include <linux/init.h>
> #include <linux/kernel.h>
> #include <linux/mm.h>
> #include <linux/module.h>
> @@ -19,7 +18,7 @@
> t a, b; \
> t sum, diff, prod; \
> bool s_of, d_of, p_of; \
> - } t ## _tests[] __initconst
> + } t ## _tests[]
>
> DEFINE_TEST_ARRAY(u8) = {
> {0, 0, 0, 0, 0, false, false, false},
> @@ -215,48 +214,38 @@ DEFINE_TEST_ARRAY(s64) = {
> {0, -S64_MAX, -S64_MAX, S64_MAX, 0, false, false, false},
> };
>
> -#define check_one_op(t, fmt, op, sym, a, b, r, of) do { \
> - t _r; \
> - bool _of; \
> - \
> - _of = check_ ## op ## _overflow(a, b, &_r); \
> - if (_of != of) { \
> - pr_warn("expected "fmt" "sym" "fmt \
> - " to%s overflow (type %s)\n", \
> - a, b, of ? "" : " not", #t); \
> - err = 1; \
> - } \
> - if (_r != r) { \
> - pr_warn("expected "fmt" "sym" "fmt" == " \
> - fmt", got "fmt" (type %s)\n", \
> - a, b, r, _r, #t); \
> - err = 1; \
> - } \
> +#define check_one_op(t, fmt, op, sym, a, b, want, of) do { \
> + t _got; \
> + bool _of; \
> + \
> + _of = check_ ## op ## _overflow(a, b, &_got); \
> + KUNIT_EXPECT_EQ_MSG(test, _of, of, \
> + "expected " fmt " " sym " " fmt " to%s overflow " \
> + "(type %s)", a, b, of ? "" : " not", #t); \
> + \
> + KUNIT_EXPECT_EQ_MSG(test, _got, want, \
> + "wrong result for " fmt " " sym " " fmt " (type %s)", \
> + a, b, #t); \
> } while (0)
>
> #define DEFINE_TEST_FUNC(t, fmt) \
> -static int __init do_test_ ## t(const struct test_ ## t *p) \
> -{ \
> - int err = 0; \
> - \
> +static void do_test_ ## t(struct kunit *test, const struct test_ ## t *p)\
> +{ \
> check_one_op(t, fmt, add, "+", p->a, p->b, p->sum, p->s_of); \
> check_one_op(t, fmt, add, "+", p->b, p->a, p->sum, p->s_of); \
> check_one_op(t, fmt, sub, "-", p->a, p->b, p->diff, p->d_of); \
> check_one_op(t, fmt, mul, "*", p->a, p->b, p->prod, p->p_of); \
> check_one_op(t, fmt, mul, "*", p->b, p->a, p->prod, p->p_of); \
> - \
> - return err; \
> } \
> \
> -static int __init test_ ## t ## _overflow(void) { \
> - int err = 0; \
> +static void test_ ## t ## _overflow(struct kunit *test) \
> +{ \
> unsigned i; \
> \
> - pr_info("%-3s: %zu arithmetic tests\n", #t, \
> - ARRAY_SIZE(t ## _tests)); \
> + kunit_info(test, "%-3s: %zu arithmetic tests\n", #t, \
> + ARRAY_SIZE(t ## _tests)); \
> for (i = 0; i < ARRAY_SIZE(t ## _tests); ++i) \
> - err |= do_test_ ## t(&t ## _tests[i]); \
> - return err; \
> + do_test_ ## t(test, &t ## _tests[i]); \
> }
>
> DEFINE_TEST_FUNC(u8, "%d");
> @@ -270,199 +259,174 @@ DEFINE_TEST_FUNC(u64, "%llu");
> DEFINE_TEST_FUNC(s64, "%lld");
> #endif
>
> -static int __init test_overflow_calculation(void)
> +static void test_overflow_shift(struct kunit *test)
> {
> - int err = 0;
> -
> - err |= test_u8_overflow();
> - err |= test_s8_overflow();
> - err |= test_u16_overflow();
> - err |= test_s16_overflow();
> - err |= test_u32_overflow();
> - err |= test_s32_overflow();
> -#if BITS_PER_LONG == 64
> - err |= test_u64_overflow();
> - err |= test_s64_overflow();
> -#endif
> -
> - return err;
> -}
> -
> -static int __init test_overflow_shift(void)
> -{
> - int err = 0;
> -
> /* Args are: value, shift, type, expected result, overflow expected */
> -#define TEST_ONE_SHIFT(a, s, t, expect, of) ({ \
> +#define TEST_ONE_SHIFT(a, s, t, expect, of) do { \
> int __failed = 0; \
> typeof(a) __a = (a); \
> typeof(s) __s = (s); \
> - t __e = (expect); \
> - t __d; \
> - bool __of = check_shl_overflow(__a, __s, &__d); \
> + t __want = (expect); \
> + t __got; \
> + bool __of = check_shl_overflow(__a, __s, &__got); \
> if (__of != of) { \
> - pr_warn("expected (%s)(%s << %s) to%s overflow\n", \
> - #t, #a, #s, of ? "" : " not"); \
> + KUNIT_FAIL(test, "expected (%s)(%s << %s) to%s overflow"\
> + #t, #a, #s, of ? "" : " not"); \
> __failed = 1; \
> - } else if (!__of && __d != __e) { \
> - pr_warn("expected (%s)(%s << %s) == %s\n", \
> + } else if (!__of && __got != __want) { \
> + KUNIT_EXPECT_EQ_MSG(test, __got, __want, \
> + "expected (%s)(%s << %s) == %s", \
> #t, #a, #s, #expect); \
> - if ((t)-1 < 0) \
> - pr_warn("got %lld\n", (s64)__d); \
> - else \
> - pr_warn("got %llu\n", (u64)__d); \
> __failed = 1; \
> } \
> if (!__failed) \
> - pr_info("ok: (%s)(%s << %s) == %s\n", #t, #a, #s, \
> - of ? "overflow" : #expect); \
> - __failed; \
> -})
> + kunit_info(test, "ok: (%s)(%s << %s) == %s\n", #t, #a, \
> + #s, of ? "overflow" : #expect); \
> +} while (0)
>
> /* Sane shifts. */
> - err |= TEST_ONE_SHIFT(1, 0, u8, 1 << 0, false);
> - err |= TEST_ONE_SHIFT(1, 4, u8, 1 << 4, false);
> - err |= TEST_ONE_SHIFT(1, 7, u8, 1 << 7, false);
> - err |= TEST_ONE_SHIFT(0xF, 4, u8, 0xF << 4, false);
> - err |= TEST_ONE_SHIFT(1, 0, u16, 1 << 0, false);
> - err |= TEST_ONE_SHIFT(1, 10, u16, 1 << 10, false);
> - err |= TEST_ONE_SHIFT(1, 15, u16, 1 << 15, false);
> - err |= TEST_ONE_SHIFT(0xFF, 8, u16, 0xFF << 8, false);
> - err |= TEST_ONE_SHIFT(1, 0, int, 1 << 0, false);
> - err |= TEST_ONE_SHIFT(1, 16, int, 1 << 16, false);
> - err |= TEST_ONE_SHIFT(1, 30, int, 1 << 30, false);
> - err |= TEST_ONE_SHIFT(1, 0, s32, 1 << 0, false);
> - err |= TEST_ONE_SHIFT(1, 16, s32, 1 << 16, false);
> - err |= TEST_ONE_SHIFT(1, 30, s32, 1 << 30, false);
> - err |= TEST_ONE_SHIFT(1, 0, unsigned int, 1U << 0, false);
> - err |= TEST_ONE_SHIFT(1, 20, unsigned int, 1U << 20, false);
> - err |= TEST_ONE_SHIFT(1, 31, unsigned int, 1U << 31, false);
> - err |= TEST_ONE_SHIFT(0xFFFFU, 16, unsigned int, 0xFFFFU << 16, false);
> - err |= TEST_ONE_SHIFT(1, 0, u32, 1U << 0, false);
> - err |= TEST_ONE_SHIFT(1, 20, u32, 1U << 20, false);
> - err |= TEST_ONE_SHIFT(1, 31, u32, 1U << 31, false);
> - err |= TEST_ONE_SHIFT(0xFFFFU, 16, u32, 0xFFFFU << 16, false);
> - err |= TEST_ONE_SHIFT(1, 0, u64, 1ULL << 0, false);
> - err |= TEST_ONE_SHIFT(1, 40, u64, 1ULL << 40, false);
> - err |= TEST_ONE_SHIFT(1, 63, u64, 1ULL << 63, false);
> - err |= TEST_ONE_SHIFT(0xFFFFFFFFULL, 32, u64,
> - 0xFFFFFFFFULL << 32, false);
> + TEST_ONE_SHIFT(1, 0, u8, 1 << 0, false);
> + TEST_ONE_SHIFT(1, 4, u8, 1 << 4, false);
> + TEST_ONE_SHIFT(1, 7, u8, 1 << 7, false);
> + TEST_ONE_SHIFT(0xF, 4, u8, 0xF << 4, false);
> + TEST_ONE_SHIFT(1, 0, u16, 1 << 0, false);
> + TEST_ONE_SHIFT(1, 10, u16, 1 << 10, false);
> + TEST_ONE_SHIFT(1, 15, u16, 1 << 15, false);
> + TEST_ONE_SHIFT(0xFF, 8, u16, 0xFF << 8, false);
> + TEST_ONE_SHIFT(1, 0, int, 1 << 0, false);
> + TEST_ONE_SHIFT(1, 16, int, 1 << 16, false);
> + TEST_ONE_SHIFT(1, 30, int, 1 << 30, false);
> + TEST_ONE_SHIFT(1, 0, s32, 1 << 0, false);
> + TEST_ONE_SHIFT(1, 16, s32, 1 << 16, false);
> + TEST_ONE_SHIFT(1, 30, s32, 1 << 30, false);
> + TEST_ONE_SHIFT(1, 0, unsigned int, 1U << 0, false);
> + TEST_ONE_SHIFT(1, 20, unsigned int, 1U << 20, false);
> + TEST_ONE_SHIFT(1, 31, unsigned int, 1U << 31, false);
> + TEST_ONE_SHIFT(0xFFFFU, 16, unsigned int, 0xFFFFU << 16, false);
> + TEST_ONE_SHIFT(1, 0, u32, 1U << 0, false);
> + TEST_ONE_SHIFT(1, 20, u32, 1U << 20, false);
> + TEST_ONE_SHIFT(1, 31, u32, 1U << 31, false);
> + TEST_ONE_SHIFT(0xFFFFU, 16, u32, 0xFFFFU << 16, false);
> + TEST_ONE_SHIFT(1, 0, u64, 1ULL << 0, false);
> + TEST_ONE_SHIFT(1, 40, u64, 1ULL << 40, false);
> + TEST_ONE_SHIFT(1, 63, u64, 1ULL << 63, false);
> + TEST_ONE_SHIFT(0xFFFFFFFFULL, 32, u64, 0xFFFFFFFFULL << 32, false);
>
> /* Sane shift: start and end with 0, without a too-wide shift. */
> - err |= TEST_ONE_SHIFT(0, 7, u8, 0, false);
> - err |= TEST_ONE_SHIFT(0, 15, u16, 0, false);
> - err |= TEST_ONE_SHIFT(0, 31, unsigned int, 0, false);
> - err |= TEST_ONE_SHIFT(0, 31, u32, 0, false);
> - err |= TEST_ONE_SHIFT(0, 63, u64, 0, false);
> + TEST_ONE_SHIFT(0, 7, u8, 0, false);
> + TEST_ONE_SHIFT(0, 15, u16, 0, false);
> + TEST_ONE_SHIFT(0, 31, unsigned int, 0, false);
> + TEST_ONE_SHIFT(0, 31, u32, 0, false);
> + TEST_ONE_SHIFT(0, 63, u64, 0, false);
>
> /* Sane shift: start and end with 0, without reaching signed bit. */
> - err |= TEST_ONE_SHIFT(0, 6, s8, 0, false);
> - err |= TEST_ONE_SHIFT(0, 14, s16, 0, false);
> - err |= TEST_ONE_SHIFT(0, 30, int, 0, false);
> - err |= TEST_ONE_SHIFT(0, 30, s32, 0, false);
> - err |= TEST_ONE_SHIFT(0, 62, s64, 0, false);
> + TEST_ONE_SHIFT(0, 6, s8, 0, false);
> + TEST_ONE_SHIFT(0, 14, s16, 0, false);
> + TEST_ONE_SHIFT(0, 30, int, 0, false);
> + TEST_ONE_SHIFT(0, 30, s32, 0, false);
> + TEST_ONE_SHIFT(0, 62, s64, 0, false);
>
> /* Overflow: shifted the bit off the end. */
> - err |= TEST_ONE_SHIFT(1, 8, u8, 0, true);
> - err |= TEST_ONE_SHIFT(1, 16, u16, 0, true);
> - err |= TEST_ONE_SHIFT(1, 32, unsigned int, 0, true);
> - err |= TEST_ONE_SHIFT(1, 32, u32, 0, true);
> - err |= TEST_ONE_SHIFT(1, 64, u64, 0, true);
> + TEST_ONE_SHIFT(1, 8, u8, 0, true);
> + TEST_ONE_SHIFT(1, 16, u16, 0, true);
> + TEST_ONE_SHIFT(1, 32, unsigned int, 0, true);
> + TEST_ONE_SHIFT(1, 32, u32, 0, true);
> + TEST_ONE_SHIFT(1, 64, u64, 0, true);
>
> /* Overflow: shifted into the signed bit. */
> - err |= TEST_ONE_SHIFT(1, 7, s8, 0, true);
> - err |= TEST_ONE_SHIFT(1, 15, s16, 0, true);
> - err |= TEST_ONE_SHIFT(1, 31, int, 0, true);
> - err |= TEST_ONE_SHIFT(1, 31, s32, 0, true);
> - err |= TEST_ONE_SHIFT(1, 63, s64, 0, true);
> + TEST_ONE_SHIFT(1, 7, s8, 0, true);
> + TEST_ONE_SHIFT(1, 15, s16, 0, true);
> + TEST_ONE_SHIFT(1, 31, int, 0, true);
> + TEST_ONE_SHIFT(1, 31, s32, 0, true);
> + TEST_ONE_SHIFT(1, 63, s64, 0, true);
>
> /* Overflow: high bit falls off unsigned types. */
> /* 10010110 */
> - err |= TEST_ONE_SHIFT(150, 1, u8, 0, true);
> + TEST_ONE_SHIFT(150, 1, u8, 0, true);
> /* 1000100010010110 */
> - err |= TEST_ONE_SHIFT(34966, 1, u16, 0, true);
> + TEST_ONE_SHIFT(34966, 1, u16, 0, true);
> /* 10000100000010001000100010010110 */
> - err |= TEST_ONE_SHIFT(2215151766U, 1, u32, 0, true);
> - err |= TEST_ONE_SHIFT(2215151766U, 1, unsigned int, 0, true);
> + TEST_ONE_SHIFT(2215151766U, 1, u32, 0, true);
> + TEST_ONE_SHIFT(2215151766U, 1, unsigned int, 0, true);
> /* 1000001000010000010000000100000010000100000010001000100010010110 */
> - err |= TEST_ONE_SHIFT(9372061470395238550ULL, 1, u64, 0, true);
> + TEST_ONE_SHIFT(9372061470395238550ULL, 1, u64, 0, true);
>
> /* Overflow: bit shifted into signed bit on signed types. */
> /* 01001011 */
> - err |= TEST_ONE_SHIFT(75, 1, s8, 0, true);
> + TEST_ONE_SHIFT(75, 1, s8, 0, true);
> /* 0100010001001011 */
> - err |= TEST_ONE_SHIFT(17483, 1, s16, 0, true);
> + TEST_ONE_SHIFT(17483, 1, s16, 0, true);
> /* 01000010000001000100010001001011 */
> - err |= TEST_ONE_SHIFT(1107575883, 1, s32, 0, true);
> - err |= TEST_ONE_SHIFT(1107575883, 1, int, 0, true);
> + TEST_ONE_SHIFT(1107575883, 1, s32, 0, true);
> + TEST_ONE_SHIFT(1107575883, 1, int, 0, true);
> /* 0100000100001000001000000010000001000010000001000100010001001011 */
> - err |= TEST_ONE_SHIFT(4686030735197619275LL, 1, s64, 0, true);
> + TEST_ONE_SHIFT(4686030735197619275LL, 1, s64, 0, true);
>
> /* Overflow: bit shifted past signed bit on signed types. */
> /* 01001011 */
> - err |= TEST_ONE_SHIFT(75, 2, s8, 0, true);
> + TEST_ONE_SHIFT(75, 2, s8, 0, true);
> /* 0100010001001011 */
> - err |= TEST_ONE_SHIFT(17483, 2, s16, 0, true);
> + TEST_ONE_SHIFT(17483, 2, s16, 0, true);
> /* 01000010000001000100010001001011 */
> - err |= TEST_ONE_SHIFT(1107575883, 2, s32, 0, true);
> - err |= TEST_ONE_SHIFT(1107575883, 2, int, 0, true);
> + TEST_ONE_SHIFT(1107575883, 2, s32, 0, true);
> + TEST_ONE_SHIFT(1107575883, 2, int, 0, true);
> /* 0100000100001000001000000010000001000010000001000100010001001011 */
> - err |= TEST_ONE_SHIFT(4686030735197619275LL, 2, s64, 0, true);
> + TEST_ONE_SHIFT(4686030735197619275LL, 2, s64, 0, true);
>
> /* Overflow: values larger than destination type. */
> - err |= TEST_ONE_SHIFT(0x100, 0, u8, 0, true);
> - err |= TEST_ONE_SHIFT(0xFF, 0, s8, 0, true);
> - err |= TEST_ONE_SHIFT(0x10000U, 0, u16, 0, true);
> - err |= TEST_ONE_SHIFT(0xFFFFU, 0, s16, 0, true);
> - err |= TEST_ONE_SHIFT(0x100000000ULL, 0, u32, 0, true);
> - err |= TEST_ONE_SHIFT(0x100000000ULL, 0, unsigned int, 0, true);
> - err |= TEST_ONE_SHIFT(0xFFFFFFFFUL, 0, s32, 0, true);
> - err |= TEST_ONE_SHIFT(0xFFFFFFFFUL, 0, int, 0, true);
> - err |= TEST_ONE_SHIFT(0xFFFFFFFFFFFFFFFFULL, 0, s64, 0, true);
> + TEST_ONE_SHIFT(0x100, 0, u8, 0, true);
> + TEST_ONE_SHIFT(0xFF, 0, s8, 0, true);
> + TEST_ONE_SHIFT(0x10000U, 0, u16, 0, true);
> + TEST_ONE_SHIFT(0xFFFFU, 0, s16, 0, true);
> + TEST_ONE_SHIFT(0x100000000ULL, 0, u32, 0, true);
> + TEST_ONE_SHIFT(0x100000000ULL, 0, unsigned int, 0, true);
> + TEST_ONE_SHIFT(0xFFFFFFFFUL, 0, s32, 0, true);
> + TEST_ONE_SHIFT(0xFFFFFFFFUL, 0, int, 0, true);
> + TEST_ONE_SHIFT(0xFFFFFFFFFFFFFFFFULL, 0, s64, 0, true);
>
> /* Nonsense: negative initial value. */
> - err |= TEST_ONE_SHIFT(-1, 0, s8, 0, true);
> - err |= TEST_ONE_SHIFT(-1, 0, u8, 0, true);
> - err |= TEST_ONE_SHIFT(-5, 0, s16, 0, true);
> - err |= TEST_ONE_SHIFT(-5, 0, u16, 0, true);
> - err |= TEST_ONE_SHIFT(-10, 0, int, 0, true);
> - err |= TEST_ONE_SHIFT(-10, 0, unsigned int, 0, true);
> - err |= TEST_ONE_SHIFT(-100, 0, s32, 0, true);
> - err |= TEST_ONE_SHIFT(-100, 0, u32, 0, true);
> - err |= TEST_ONE_SHIFT(-10000, 0, s64, 0, true);
> - err |= TEST_ONE_SHIFT(-10000, 0, u64, 0, true);
> + TEST_ONE_SHIFT(-1, 0, s8, 0, true);
> + TEST_ONE_SHIFT(-1, 0, u8, 0, true);
> + TEST_ONE_SHIFT(-5, 0, s16, 0, true);
> + TEST_ONE_SHIFT(-5, 0, u16, 0, true);
> + TEST_ONE_SHIFT(-10, 0, int, 0, true);
> + TEST_ONE_SHIFT(-10, 0, unsigned int, 0, true);
> + TEST_ONE_SHIFT(-100, 0, s32, 0, true);
> + TEST_ONE_SHIFT(-100, 0, u32, 0, true);
> + TEST_ONE_SHIFT(-10000, 0, s64, 0, true);
> + TEST_ONE_SHIFT(-10000, 0, u64, 0, true);
>
> /* Nonsense: negative shift values. */
> - err |= TEST_ONE_SHIFT(0, -5, s8, 0, true);
> - err |= TEST_ONE_SHIFT(0, -5, u8, 0, true);
> - err |= TEST_ONE_SHIFT(0, -10, s16, 0, true);
> - err |= TEST_ONE_SHIFT(0, -10, u16, 0, true);
> - err |= TEST_ONE_SHIFT(0, -15, int, 0, true);
> - err |= TEST_ONE_SHIFT(0, -15, unsigned int, 0, true);
> - err |= TEST_ONE_SHIFT(0, -20, s32, 0, true);
> - err |= TEST_ONE_SHIFT(0, -20, u32, 0, true);
> - err |= TEST_ONE_SHIFT(0, -30, s64, 0, true);
> - err |= TEST_ONE_SHIFT(0, -30, u64, 0, true);
> + TEST_ONE_SHIFT(0, -5, s8, 0, true);
> + TEST_ONE_SHIFT(0, -5, u8, 0, true);
> + TEST_ONE_SHIFT(0, -10, s16, 0, true);
> + TEST_ONE_SHIFT(0, -10, u16, 0, true);
> + TEST_ONE_SHIFT(0, -15, int, 0, true);
> + TEST_ONE_SHIFT(0, -15, unsigned int, 0, true);
> + TEST_ONE_SHIFT(0, -20, s32, 0, true);
> + TEST_ONE_SHIFT(0, -20, u32, 0, true);
> + TEST_ONE_SHIFT(0, -30, s64, 0, true);
> + TEST_ONE_SHIFT(0, -30, u64, 0, true);
>
> /* Overflow: shifted at or beyond entire type's bit width. */
> - err |= TEST_ONE_SHIFT(0, 8, u8, 0, true);
> - err |= TEST_ONE_SHIFT(0, 9, u8, 0, true);
> - err |= TEST_ONE_SHIFT(0, 8, s8, 0, true);
> - err |= TEST_ONE_SHIFT(0, 9, s8, 0, true);
> - err |= TEST_ONE_SHIFT(0, 16, u16, 0, true);
> - err |= TEST_ONE_SHIFT(0, 17, u16, 0, true);
> - err |= TEST_ONE_SHIFT(0, 16, s16, 0, true);
> - err |= TEST_ONE_SHIFT(0, 17, s16, 0, true);
> - err |= TEST_ONE_SHIFT(0, 32, u32, 0, true);
> - err |= TEST_ONE_SHIFT(0, 33, u32, 0, true);
> - err |= TEST_ONE_SHIFT(0, 32, int, 0, true);
> - err |= TEST_ONE_SHIFT(0, 33, int, 0, true);
> - err |= TEST_ONE_SHIFT(0, 32, s32, 0, true);
> - err |= TEST_ONE_SHIFT(0, 33, s32, 0, true);
> - err |= TEST_ONE_SHIFT(0, 64, u64, 0, true);
> - err |= TEST_ONE_SHIFT(0, 65, u64, 0, true);
> - err |= TEST_ONE_SHIFT(0, 64, s64, 0, true);
> - err |= TEST_ONE_SHIFT(0, 65, s64, 0, true);
> + TEST_ONE_SHIFT(0, 8, u8, 0, true);
> + TEST_ONE_SHIFT(0, 9, u8, 0, true);
> + TEST_ONE_SHIFT(0, 8, s8, 0, true);
> + TEST_ONE_SHIFT(0, 9, s8, 0, true);
> + TEST_ONE_SHIFT(0, 16, u16, 0, true);
> + TEST_ONE_SHIFT(0, 17, u16, 0, true);
> + TEST_ONE_SHIFT(0, 16, s16, 0, true);
> + TEST_ONE_SHIFT(0, 17, s16, 0, true);
> + TEST_ONE_SHIFT(0, 32, u32, 0, true);
> + TEST_ONE_SHIFT(0, 33, u32, 0, true);
> + TEST_ONE_SHIFT(0, 32, int, 0, true);
> + TEST_ONE_SHIFT(0, 33, int, 0, true);
> + TEST_ONE_SHIFT(0, 32, s32, 0, true);
> + TEST_ONE_SHIFT(0, 33, s32, 0, true);
> + TEST_ONE_SHIFT(0, 64, u64, 0, true);
> + TEST_ONE_SHIFT(0, 65, u64, 0, true);
> + TEST_ONE_SHIFT(0, 64, s64, 0, true);
> + TEST_ONE_SHIFT(0, 65, s64, 0, true);
>
> /*
> * Corner case: for unsigned types, we fail when we've shifted
> @@ -473,13 +437,11 @@ static int __init test_overflow_shift(void)
> * signed bit). So, for now, we will test this condition but
> * mark it as not expected to overflow.
> */
> - err |= TEST_ONE_SHIFT(0, 7, s8, 0, false);
> - err |= TEST_ONE_SHIFT(0, 15, s16, 0, false);
> - err |= TEST_ONE_SHIFT(0, 31, int, 0, false);
> - err |= TEST_ONE_SHIFT(0, 31, s32, 0, false);
> - err |= TEST_ONE_SHIFT(0, 63, s64, 0, false);
> -
> - return err;
> + TEST_ONE_SHIFT(0, 7, s8, 0, false);
> + TEST_ONE_SHIFT(0, 15, s16, 0, false);
> + TEST_ONE_SHIFT(0, 31, int, 0, false);
> + TEST_ONE_SHIFT(0, 31, s32, 0, false);
> + TEST_ONE_SHIFT(0, 63, s64, 0, false);
> }
>
> /*
> @@ -499,7 +461,7 @@ static int __init test_overflow_shift(void)
> #define TEST_SIZE (5 * 4096)
>
> #define DEFINE_TEST_ALLOC(func, free_func, want_arg, want_gfp, want_node)\
> -static int __init test_ ## func (void *arg) \
> +static void test_ ## func (struct kunit *test, void *arg) \
> { \
> volatile size_t a = TEST_SIZE; \
> volatile size_t b = (SIZE_MAX / TEST_SIZE) + 1; \
> @@ -507,31 +469,26 @@ static int __init test_ ## func (void *arg) \
> \
> /* Tiny allocation test. */ \
> ptr = alloc ## want_arg ## want_gfp ## want_node (func, arg, 1);\
> - if (!ptr) { \
> - pr_warn(#func " failed regular allocation?!\n"); \
> - return 1; \
> - } \
> + KUNIT_ASSERT_NOT_ERR_OR_NULL_MSG(test, ptr, \
> + #func " failed regular allocation?!"); \
> free ## want_arg (free_func, arg, ptr); \
> \
> /* Wrapped allocation test. */ \
> ptr = alloc ## want_arg ## want_gfp ## want_node (func, arg, \
> a * b); \
> - if (!ptr) { \
> - pr_warn(#func " unexpectedly failed bad wrapping?!\n"); \
> - return 1; \
> - } \
> + KUNIT_ASSERT_NOT_ERR_OR_NULL_MSG(test, ptr, \
> + #func " unexpectedly failed bad wrapping?!"); \
> free ## want_arg (free_func, arg, ptr); \
> \
> /* Saturated allocation test. */ \
> ptr = alloc ## want_arg ## want_gfp ## want_node (func, arg, \
> array_size(a, b)); \
> if (ptr) { \
> - pr_warn(#func " missed saturation!\n"); \
> + KUNIT_FAIL(test, #func " missed saturation!\n"); \
> free ## want_arg (free_func, arg, ptr); \
> - return 1; \
> + return; \
> } \
> - pr_info(#func " detected saturation\n"); \
> - return 0; \
> + kunit_info(test, #func " detected saturation\n"); \
> }
>
> /*
> @@ -555,60 +512,56 @@ DEFINE_TEST_ALLOC(kvzalloc_node, kvfree, 0, 1, 1);
> DEFINE_TEST_ALLOC(devm_kmalloc, devm_kfree, 1, 1, 0);
> DEFINE_TEST_ALLOC(devm_kzalloc, devm_kfree, 1, 1, 0);
>
> -static int __init test_overflow_allocation(void)
> +static void test_overflow_allocation(struct kunit *test)
> {
> const char device_name[] = "overflow-test";
> struct device *dev;
> - int err = 0;
>
> /* Create dummy device for devm_kmalloc()-family tests. */
> dev = root_device_register(device_name);
> - if (IS_ERR(dev)) {
> - pr_warn("Cannot register test device\n");
> - return 1;
> - }
> -
> - err |= test_kmalloc(NULL);
> - err |= test_kmalloc_node(NULL);
> - err |= test_kzalloc(NULL);
> - err |= test_kzalloc_node(NULL);
> - err |= test_kvmalloc(NULL);
> - err |= test_kvmalloc_node(NULL);
> - err |= test_kvzalloc(NULL);
> - err |= test_kvzalloc_node(NULL);
> - err |= test_vmalloc(NULL);
> - err |= test_vmalloc_node(NULL);
> - err |= test_vzalloc(NULL);
> - err |= test_vzalloc_node(NULL);
> - err |= test_devm_kmalloc(dev);
> - err |= test_devm_kzalloc(dev);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL_MSG(test, dev,
> + "Cannot register test device");
> +
> + test_kmalloc(test, NULL);
> + test_kmalloc_node(test, NULL);
> + test_kzalloc(test, NULL);
> + test_kzalloc_node(test, NULL);
> + test_kvmalloc(test, NULL);
> + test_kvmalloc_node(test, NULL);
> + test_kvzalloc(test, NULL);
> + test_kvzalloc_node(test, NULL);
> + test_vmalloc(test, NULL);
> + test_vmalloc_node(test, NULL);
> + test_vzalloc(test, NULL);
> + test_vzalloc_node(test, NULL);
> + test_devm_kmalloc(test, dev);
> + test_devm_kzalloc(test, dev);
>
> device_unregister(dev);
> -
> - return err;
> }
>
> -static int __init test_module_init(void)
> -{
> - int err = 0;
> -
> - err |= test_overflow_calculation();
> - err |= test_overflow_shift();
> - err |= test_overflow_allocation();
> +static struct kunit_case overflow_test_cases[] = {
> + KUNIT_CASE(test_u8_overflow),
> + KUNIT_CASE(test_s8_overflow),
> + KUNIT_CASE(test_u16_overflow),
> + KUNIT_CASE(test_s16_overflow),
> + KUNIT_CASE(test_u32_overflow),
> + KUNIT_CASE(test_s32_overflow),
> +#if BITS_PER_LONG == 64
> + KUNIT_CASE(test_u64_overflow),
> + KUNIT_CASE(test_s64_overflow),
> +#endif
>
> - if (err) {
> - pr_warn("FAIL!\n");
> - err = -EINVAL;
> - } else {
> - pr_info("all tests passed\n");
> - }
> + KUNIT_CASE(test_overflow_shift),
> + KUNIT_CASE(test_overflow_allocation),
> + {}
> +};
>
> - return err;
> -}
> +static struct kunit_suite overflow_test_suite = {
> + .name = "lib_overflow",
> + .test_cases = overflow_test_cases,
> +};
>
> -static void __exit test_module_exit(void)
> -{ }
> +kunit_test_suites(&overflow_test_suite);
>
> -module_init(test_module_init);
> -module_exit(test_module_exit);
> MODULE_LICENSE("Dual MIT/GPL");
>
> base-commit: 88b06399c9c766c283e070b022b5ceafa4f63f19
> --
> 2.31.1.607.g51e8a6a459-goog
>
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