linux-kernel - Re: [PATCH v3 11/12] selftests/nolibc: add new gettimeofday test cases

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Message-ID: <2fccaff5-2354-4ac0-8389-1004d47d8dc9@t-8ch.de>
Date:   Sun, 4 Jun 2023 08:46:12 +0200
From:   Thomas Weißschuh <thomas@...ch.de>
To:     Zhangjin Wu <falcon@...ylab.org>
Cc:     w@....eu, arnd@...db.de, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v3 11/12] selftests/nolibc: add new gettimeofday test
 cases

On 2023-06-03 16:16:07+0800, Zhangjin Wu wrote:
> These 2 test cases are added to cover the normal using scenes of
> gettimeofday().
> 
> They have been used to trigger and fix up such issue with nolibc:
> 
>     nolibc-test.c:(.text.gettimeofday+0x54): undefined reference to `__aeabi_ldivmod'
> 
> This issue happens while there is no "unsigned int" conversion in the
> coming new clock_gettime / clock_gettime64 syscall path of
> gettimeofday():
> 
>     tv->tv_usec = ts.tv_nsec / 1000;

As mentioned before this looks to me like an issue in the build setup.
Could you provide reproduction steps?

Nevertheless I guess the tests themselves are fine to have.

> Suggested-by: Thomas Weißschuh <linux@...ssschuh.net>
> Link: https://lore.kernel.org/linux-riscv/280867a8-7601-4a96-9b85-87668e1f1282@t-8ch.de/
> Signed-off-by: Zhangjin Wu <falcon@...ylab.org>
> ---
>  tools/testing/selftests/nolibc/nolibc-test.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c
> index bf63fc66e486..e68c5692ec54 100644
> --- a/tools/testing/selftests/nolibc/nolibc-test.c
> +++ b/tools/testing/selftests/nolibc/nolibc-test.c
> @@ -533,6 +533,8 @@ static int test_stat_timestamps(void)
>   */
>  int run_syscall(int min, int max)
>  {
> +	struct timeval tv;
> +	struct timezone tz;
>  	struct stat stat_buf;
>  	int euid0;
>  	int proc;
> @@ -588,6 +590,8 @@ int run_syscall(int min, int max)
>  		CASE_TEST(getdents64_root);   EXPECT_SYSNE(1, test_getdents64("/"), -1); break;
>  		CASE_TEST(getdents64_null);   EXPECT_SYSER(1, test_getdents64("/dev/null"), -1, ENOTDIR); break;
>  		CASE_TEST(gettimeofday_null); EXPECT_SYSZR(1, gettimeofday(NULL, NULL)); break;
> +		CASE_TEST(gettimeofday_tv);   EXPECT_SYSZR(1, gettimeofday(&tv, NULL)); break;
> +		CASE_TEST(gettimeofday_tv_tz);EXPECT_SYSZR(1, gettimeofday(&tv, &tz)); break;
>  		CASE_TEST(getpagesize);       EXPECT_SYSZR(1, test_getpagesize()); break;
>  		CASE_TEST(ioctl_tiocinq);     EXPECT_SYSZR(1, ioctl(0, TIOCINQ, &tmp)); break;
>  		CASE_TEST(ioctl_tiocinq);     EXPECT_SYSZR(1, ioctl(0, TIOCINQ, &tmp)); break;
> -- 
> 2.25.1
>