On 2023-05-30 14:37:49+0800, Zhangjin Wu wrote:
> These 3 test cases are added to cover the normal using scenes of
> gettimeofday().
>
> They have been used to trigger and fix up such issue:
>
> nolibc-test.c:(.text.gettimeofday+0x54): undefined reference to `__aeabi_ldivmod'
>
> This issue happens while there is no "unsigned int" conversion in the
> new clock_gettime / clock_gettime64 syscall path of gettimeofday():
>
> tv->tv_usec = ts.tv_nsec / 1000;
>
> Signed-off-by: Zhangjin Wu <falcon@xxxxxxxxxxx>
> ---
> tools/testing/selftests/nolibc/nolibc-test.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c
> index 8ba8c2fc71a0..20d184da9a2b 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 +590,9 @@ 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_tz); EXPECT_SYSZR(1, gettimeofday(NULL, &tz)); break;
Calling gettimeofday(NULL, ...) will actually segfault on glibc.
It works when calling through the VDSO, but not the logic in glibc
itself, which is guess is allowed by POSIX.
I propose to avoid doing it :-)
Either we gate the existing test in #ifdef NOLIBC or we remove it.
> + 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
>
