tst: Provide test for sched_rr_get_interval

  This change adds new test to assess sched_rr_get_interval's
functionality.

To be more specific - following use cases are checked:
- If the read interval is correct
- If the proper ABI is used - to check if adjacent data is not
  overwritten
---
 posix/Makefile                    |  2 +-
 posix/tst-sched_rr_get_interval.c | 53 +++++++++++++++++++++++++++++++
 2 files changed, 54 insertions(+), 1 deletion(-)
 create mode 100644 posix/tst-sched_rr_get_interval.c
  

Dear Community,

> This change adds new test to assess sched_rr_get_interval's
> functionality.
> 
> To be more specific - following use cases are checked:
> - If the read interval is correct
> - If the proper ABI is used - to check if adjacent data is not
>   overwritten

Gentle ping on this patch...

> ---
>  posix/Makefile                    |  2 +-
>  posix/tst-sched_rr_get_interval.c | 53
> +++++++++++++++++++++++++++++++ 2 files changed, 54 insertions(+), 1
> deletion(-) create mode 100644 posix/tst-sched_rr_get_interval.c
> 
> diff --git a/posix/Makefile b/posix/Makefile
> index 956ef7d397..7ef8525500 100644
> --- a/posix/Makefile
> +++ b/posix/Makefile
> @@ -102,7 +102,7 @@ tests		:= test-errno tstgetopt
> testfnm runtests runptests \ tst-sysconf-empty-chroot
> tst-glob_symlinks tst-fexecve \ tst-glob-tilde test-ssize-max
> tst-spawn4 bug-regex37 \ bug-regex38 tst-regcomp-truncated
> tst-spawn-chdir \
> -		   tst-wordexp-nocmd
> +		   tst-wordexp-nocmd tst-sched_rr_get_interval
>  tests-internal	:= bug-regex5 bug-regex20 bug-regex33 \
>  		   tst-rfc3484 tst-rfc3484-2 tst-rfc3484-3 \
>  		   tst-glob_lstat_compat tst-spawn4-compat
> diff --git a/posix/tst-sched_rr_get_interval.c
> b/posix/tst-sched_rr_get_interval.c new file mode 100644
> index 0000000000..5b15b9dd09
> --- /dev/null
> +++ b/posix/tst-sched_rr_get_interval.c
> @@ -0,0 +1,53 @@
> +/* Test for sched_rr_get_interval
> +   Copyright (C) 2021 Free Software Foundation, Inc.
> +   This file is part of the GNU C Library.
> +
> +   The GNU C Library is free software; you can redistribute it and/or
> +   modify it under the terms of the GNU Lesser General Public
> +   License as published by the Free Software Foundation; either
> +   version 2.1 of the License, or (at your option) any later version.
> +
> +   The GNU C Library is distributed in the hope that it will be
> useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> +   Lesser General Public License for more details.
> +
> +   You should have received a copy of the GNU Lesser General Public
> +   License along with the GNU C Library; if not, see
> +   <https://www.gnu.org/licenses/>.  */
> +
> +#include <time.h>
> +#include <sched.h>
> +#include <support/check.h>
> +
> +static int
> +do_test (void)
> +{
> +  struct timespec ts[2] = { { -1, -1 }, { -1, -1 } };
> +  const struct sched_param param = {
> +    .sched_priority = sched_get_priority_max (SCHED_RR) - 10,
> +  };
> +  int result = sched_setscheduler (0, SCHED_RR, &param);
> +
> +  if (result != 0)
> +    FAIL_UNSUPPORTED ("*** sched_setscheduler error: %m\n");
> +
> +  result = sched_rr_get_interval (0, ts);
> +  if (result != 0)
> +    FAIL_EXIT1 ("*** sched_rr_get_interval error: %m\n");
> +
> +  /* Check if returned time values are correct.  */
> +  if (ts[0].tv_sec < 0)
> +    FAIL_EXIT1 ("*** Wrong value read tv_sec: %ld\n", ts[0].tv_sec);
> +
> +  if (ts[0].tv_nsec < 0 || ts[0].tv_nsec >= 1000000000)
> +    FAIL_EXIT1 ("*** Wrong value read tv_nsec: %ld\n",
> ts[0].tv_nsec); +
> +  /* Check if adjacent memory is not overwritten.  */
> +  if (ts[1].tv_sec != -1 || ts[1].tv_nsec != -1)
> +    FAIL_EXIT1 ("*** sched_rr_get_interval caused overwrite!\n");
> +
> +  return 0;
> +}
> +
> +#include <support/test-driver.c>




Best regards,

Lukasz Majewski

--

DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma@denx.de
  

On 25/01/2021 07:10, Lukasz Majewski wrote:
> This change adds new test to assess sched_rr_get_interval's
> functionality.
> 
> To be more specific - following use cases are checked:
> - If the read interval is correct
> - If the proper ABI is used - to check if adjacent data is not
>   overwritten
> ---
>  posix/Makefile                    |  2 +-
>  posix/tst-sched_rr_get_interval.c | 53 +++++++++++++++++++++++++++++++
>  2 files changed, 54 insertions(+), 1 deletion(-)
>  create mode 100644 posix/tst-sched_rr_get_interval.c
> 
> diff --git a/posix/Makefile b/posix/Makefile
> index 956ef7d397..7ef8525500 100644
> --- a/posix/Makefile
> +++ b/posix/Makefile
> @@ -102,7 +102,7 @@ tests		:= test-errno tstgetopt testfnm runtests runptests \
>  		   tst-sysconf-empty-chroot tst-glob_symlinks tst-fexecve \
>  		   tst-glob-tilde test-ssize-max tst-spawn4 bug-regex37 \
>  		   bug-regex38 tst-regcomp-truncated tst-spawn-chdir \
> -		   tst-wordexp-nocmd
> +		   tst-wordexp-nocmd tst-sched_rr_get_interval
>  tests-internal	:= bug-regex5 bug-regex20 bug-regex33 \
>  		   tst-rfc3484 tst-rfc3484-2 tst-rfc3484-3 \
>  		   tst-glob_lstat_compat tst-spawn4-compat

I think this test should be on xtests instead of returning FAIL_UNSUPPORTED
for a failed sched_setscheduler (SCHED_RR).  The unsupported is misleading
here.

> diff --git a/posix/tst-sched_rr_get_interval.c b/posix/tst-sched_rr_get_interval.c
> new file mode 100644
> index 0000000000..5b15b9dd09
> --- /dev/null
> +++ b/posix/tst-sched_rr_get_interval.c
> @@ -0,0 +1,53 @@
> +/* Test for sched_rr_get_interval
> +   Copyright (C) 2021 Free Software Foundation, Inc.
> +   This file is part of the GNU C Library.
> +
> +   The GNU C Library is free software; you can redistribute it and/or
> +   modify it under the terms of the GNU Lesser General Public
> +   License as published by the Free Software Foundation; either
> +   version 2.1 of the License, or (at your option) any later version.
> +
> +   The GNU C Library is distributed in the hope that it will be useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> +   Lesser General Public License for more details.
> +
> +   You should have received a copy of the GNU Lesser General Public
> +   License along with the GNU C Library; if not, see
> +   <https://www.gnu.org/licenses/>.  */
> +
> +#include <time.h>
> +#include <sched.h>
> +#include <support/check.h>
> +
> +static int
> +do_test (void)
> +{
> +  struct timespec ts[2] = { { -1, -1 }, { -1, -1 } };
> +  const struct sched_param param = {
> +    .sched_priority = sched_get_priority_max (SCHED_RR) - 10,
> +  };
> +  int result = sched_setscheduler (0, SCHED_RR, &param);
> +
> +  if (result != 0)
> +    FAIL_UNSUPPORTED ("*** sched_setscheduler error: %m\n");
> +
> +  result = sched_rr_get_interval (0, ts);
> +  if (result != 0)
> +    FAIL_EXIT1 ("*** sched_rr_get_interval error: %m\n");

I would simplify to just:

  TEST_COMPARE (sched_rr_get_internal (0, ts), 0);

(the macros already dumps enough information to debug the issue).

> +
> +  /* Check if returned time values are correct.  */
> +  if (ts[0].tv_sec < 0)
> +    FAIL_EXIT1 ("*** Wrong value read tv_sec: %ld\n", ts[0].tv_sec);

TEST_VERIFY_EXIT (ts[0].tv_sec < 0);

> +
> +  if (ts[0].tv_nsec < 0 || ts[0].tv_nsec >= 1000000000)
> +    FAIL_EXIT1 ("*** Wrong value read tv_nsec: %ld\n", ts[0].tv_nsec);

TEST_VERIFY_EXIT (ts[0].tv_nsec < 0 || ts[0].tv_nsec >= 1000000000);

> +
> +  /* Check if adjacent memory is not overwritten.  */
> +  if (ts[1].tv_sec != -1 || ts[1].tv_nsec != -1)
> +    FAIL_EXIT1 ("*** sched_rr_get_interval caused overwrite!\n");

TEST_VERIFY_EXIT (ts[1].tv_sec != -1 || ts[1].tv_nsec != -1);

> +
> +  return 0;
> +}
> +
> +#include <support/test-driver.c>
>