And struct sched_attr.
In sysdeps/unix/sysv/linux/bits/sched.h, the hack that defines
sched_param around the inclusion of <linux/sched/types.h> is quite
ugly, but the definition of struct sched_param has already been
dropped by the kernel, so there is nothing else we can do and maintain
compatibility of <sched.h> with a wide range of kernel header
versions. (An alternative would involve introducing a separate header
for this functionality, but this seems unnecessary.)
The existing sched_* functions that change scheduler parameters
are already incompatible with PTHREAD_PRIO_PROTECT mutexes, so
there is no harm in adding more functionality in this area.
The documentation mostly defers to the Linux manual pages.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
which is why this mode is not enabled by default. A future version
of the library may turn it on by default, however.
+* On Linux, the sched_setattr and sched_getattr have been added, for
+ supporting parameterized scheduling policies such as SCHED_DEADLINE.
+
Deprecated and removed features, and other changes affecting compatibility:
[Add deprecations, removals and changes affecting compatibility here]
* Absolute Priority:: The first tier of priority. Posix
* Realtime Scheduling:: Scheduling among the process nobility
* Basic Scheduling Functions:: Get/set scheduling policy, priority
+* Extensible Scheduling:: Parameterized scheduling policies.
* Traditional Scheduling:: Scheduling among the vulgar masses
* CPU Affinity:: Limiting execution to certain CPUs
@end menu
@end deftypefun
+@node Extensible Scheduling
+@subsection Extensible Scheduling
+@cindex scheduling, extensible
+
+The type @code{struct sched_attr} and the functions @code{sched_setattr}
+and @code{sched_getattr} are used to implement scheduling policies with
+multiple parameters (not just priority and niceness).
+
+It is expected that these interfaces will be compatible with all future
+scheduling policies.
+
+For additional information about scheduling policies, consult consult
+the manual pages @manpageurl{sched,7} and @manpageurl{sched_setattr,2}.
+@xref{Linux Kernel}.
+
+@strong{Note:} Calling the @code{sched_setattr} function is incompatible
+with support for @code{PTHREAD_PRIO_PROTECT} mutexes.
+
+@deftp {Data Type} {struct sched_attr}
+@standards{Linux, sched.h}
+The @code{sched_attr} structure describes a parameterized scheduling policy.
+
+@strong{Portability note:} In the future, additional fields can be added
+to @code{struct sched_attr} at the end, so that the size of this data
+type changes. Do not use it in places where this matters, such as
+structure fields in installed header files, where such a change could
+impact the application binary interface (ABI).
+
+The following generic fields are available.
+
+@table @code
+@item size
+The actually used size of the data structure. See the description of
+the functions @code{sched_setattr} and @code{sched_getattr} below how this
+field is used to support extension of @code{struct sched_attr} with
+more fields.
+
+@item sched_policy
+The scheduling policy. This field determines which fields in the
+structure are used, and how the @code{sched_flags} field is interpreted.
+
+@item sched_flags
+Scheduling flags associated with the scheduling policy.
+@end table
+
+In addition to the generic fields, policy-specific fields are available.
+For additional information, consult the manual page
+@manpageurl{sched_setattr,2}. @xref{Linux Kernel}.
+@end deftp
+
+@deftypefun int sched_setaddr (pid_t @var{tid}, struct sched_attr *@var{attr}, unsigned int flags)
+@standards{Linux, sched.h}
+@safety{@mtsafe{}@assafe{}@acsafe{}}
+This functions applies the scheduling policy described by
+@code{*@var{attr}} to the thread @var{tid} (the value zero denotes the
+current thread).
+
+It is recommended to initialize unused fields to zero, either using
+@code{memset}, or using a structure initializer. The
+@code{@var{attr->size}} field should be set to @code{sizeof (struct
+sched_attr)}, to inform the kernel of the structure version in use.
+
+The @var{flags} argument must be zero. Other values may become
+available in the future.
+
+On failure, @code{sched_setattr} returns @math{-1} and sets
+@code{errno}. The following errors are related the way
+extensibility is handled.
+@table @code
+@item E2BIG
+A field in @code{*@var{attr}} has a non-zero value, but is unknown to
+the kernel. The application could try to apply a modified policy, where
+more fields are zero.
+
+@item EINVAL
+The policy in @code{@var{attr}->sched_policy} is unknown to the kernel,
+or flags are set in @code{@var{attr}->sched_flags} that the kernel does
+not know how to interpret. The application could try with fewer flags
+set, or a different scheduling policy.
+
+This error also occurs if @var{attr} is @code{NULL} or @var{flags} is
+not zero.
+
+@item EPERM
+The current thread is not sufficiently privileged to assign the policy,
+either because access to the policy is restricted in general, or because
+the current thread does not have the rights to change the scheduling
+policy of the thread @var{tid}.
+@end table
+
+Other error codes depend on the scheduling policy.
+@end deftypefun
+
+@deftypefun int sched_getaddr (pid_t @var{tid}, struct sched_attr *@var{attr}, unsigned int size, unsigned int flags)
+@standards{Linux, sched.h}
+@safety{@mtsafe{}@assafe{}@acsafe{}}
+This function obtains the scheduling policy of the thread @var{tid}
+(zero denotes the current thread) and store it in @code{*@var{attr}},
+which must have space for at least @var{size} bytes.
+
+The @var{flags} argument must be zero. Other values may become
+available in the future.
+
+Upon success, @code{@var{attr}->size} contains the size of the structure
+version used by the kernel. Fields with offsets greater or equal to
+@code{@var{attr}->size} are not updated by the kernel. To obtain
+predictable values for unknown fields, use @code{memset} to set
+all @var{size} bytes to zero prior to calling @code{sched_getattr}.
+
+On failure, @code{sched_getattr} returns @math{-1} and sets @code{errno}.
+If @code{errno} is @code{E2BIG}, this means that the buffer is not large
+large enough, and the application could retry with a larger buffer.
+@end deftypefun
+
@node Traditional Scheduling
@subsection Traditional Scheduling
@cindex scheduling, traditional
process_vm_writev \
pselect32 \
readahead \
+ sched_getattr \
+ sched_setattr \
setfsgid \
setfsuid \
setvmaname \
tst-process_mrelease \
tst-quota \
tst-rlimit-infinity \
+ tst-sched_setattr \
tst-scm_rights \
tst-sigtimedwait \
tst-sync_file_range \
posix_spawnattr_getcgroup_np;
posix_spawnattr_setcgroup_np;
}
+ GLIBC_2.41 {
+ sched_getattr;
+ sched_setattr;
+ }
GLIBC_PRIVATE {
# functions used in other libraries
__syscall_rt_sigqueueinfo;
GLIBC_2.39 stdc_trailing_zeros_ul F
GLIBC_2.39 stdc_trailing_zeros_ull F
GLIBC_2.39 stdc_trailing_zeros_us F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.4 wcstold_l F
GLIBC_2.4 wprintf F
GLIBC_2.4 wscanf F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.5 __readlinkat_chk F
GLIBC_2.5 inet6_opt_append F
GLIBC_2.5 inet6_opt_find F
GLIBC_2.39 stdc_trailing_zeros_ul F
GLIBC_2.39 stdc_trailing_zeros_ull F
GLIBC_2.39 stdc_trailing_zeros_us F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.4 xencrypt F
GLIBC_2.4 xprt_register F
GLIBC_2.4 xprt_unregister F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.5 __readlinkat_chk F
GLIBC_2.5 inet6_opt_append F
GLIBC_2.5 inet6_opt_find F
GLIBC_2.4 xencrypt F
GLIBC_2.4 xprt_register F
GLIBC_2.4 xprt_unregister F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.5 __readlinkat_chk F
GLIBC_2.5 inet6_opt_append F
GLIBC_2.5 inet6_opt_find F
# define SCHED_IDLE 5
# define SCHED_DEADLINE 6
+/* Flags that can be used in policy values. */
# define SCHED_RESET_ON_FORK 0x40000000
-#endif
-#ifdef __USE_GNU
+/* Use "" to work around incorrect macro expansion of the
+ __has_include argument (GCC PR 80005). */
+# ifdef __has_include
+# if __has_include ("linux/sched/types.h")
+/* Some older Linux versions defined sched_param in <linux/sched/types.h>. */
+# define sched_param __glibc_mask_sched_param
+# include <linux/sched/types.h>
+# undef sched_param
+# endif
+# endif
+# ifndef SCHED_ATTR_SIZE_VER0
+# include <linux/types.h>
+# define SCHED_ATTR_SIZE_VER0 48
+# define SCHED_ATTR_SIZE_VER1 56
+struct sched_attr
+{
+ __u32 size;
+ __u32 sched_policy;
+ __u64 sched_flags;
+ __s32 sched_nice;
+ __u32 sched_priority;
+ __u64 sched_runtime;
+ __u64 sched_deadline;
+ __u64 sched_period;
+ __u32 sched_util_min;
+ __u32 sched_util_max;
+ /* Additional fields may be added at the end. */
+};
+# endif /* !SCHED_ATTR_SIZE_VER0 */
+
/* Cloning flags. */
# define CSIGNAL 0x000000ff /* Signal mask to be sent at exit. */
# define CLONE_VM 0x00000100 /* Set if VM shared between processes. */
/* Switch process to namespace of type NSTYPE indicated by FD. */
extern int setns (int __fd, int __nstype) __THROW;
+
+/* Apply the scheduling attributes from *ATTR to the process or thread TID. */
+int sched_setattr (pid_t tid, struct sched_attr *attr, unsigned int flags)
+ __THROW __nonnull ((2));
+
+/* Obtain the scheduling attributes of the process or thread TID and
+ store it in *ATTR. */
+int sched_getattr (pid_t tid, struct sched_attr *attr, unsigned int size,
+ unsigned int flags)
+ __THROW __nonnull ((2)) __attr_access ((__write_only__, 2, 3));
+
#endif
__END_DECLS
GLIBC_2.39 stdc_trailing_zeros_ul F
GLIBC_2.39 stdc_trailing_zeros_ull F
GLIBC_2.39 stdc_trailing_zeros_us F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.4 sys_nerr D 0x4
GLIBC_2.4 unlinkat F
GLIBC_2.4 unshare F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.5 __readlinkat_chk F
GLIBC_2.5 inet6_opt_append F
GLIBC_2.5 inet6_opt_find F
GLIBC_2.4 sys_nerr D 0x4
GLIBC_2.4 unlinkat F
GLIBC_2.4 unshare F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.5 __readlinkat_chk F
GLIBC_2.5 inet6_opt_append F
GLIBC_2.5 inet6_opt_find F
GLIBC_2.39 stdc_trailing_zeros_ul F
GLIBC_2.39 stdc_trailing_zeros_ull F
GLIBC_2.39 stdc_trailing_zeros_us F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.4 xencrypt F
GLIBC_2.4 xprt_register F
GLIBC_2.4 xprt_unregister F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.5 __readlinkat_chk F
GLIBC_2.5 inet6_opt_append F
GLIBC_2.5 inet6_opt_find F
GLIBC_2.4 sys_nerr D 0x4
GLIBC_2.4 unlinkat F
GLIBC_2.4 unshare F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.5 __readlinkat_chk F
GLIBC_2.5 inet6_opt_append F
GLIBC_2.5 inet6_opt_find F
GLIBC_2.39 stdc_trailing_zeros_ul F
GLIBC_2.39 stdc_trailing_zeros_ull F
GLIBC_2.39 stdc_trailing_zeros_us F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.39 stdc_trailing_zeros_ul F
GLIBC_2.39 stdc_trailing_zeros_ull F
GLIBC_2.39 stdc_trailing_zeros_us F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.4 symlinkat F
GLIBC_2.4 unlinkat F
GLIBC_2.4 unshare F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.5 __readlinkat_chk F
GLIBC_2.5 inet6_opt_append F
GLIBC_2.5 inet6_opt_find F
GLIBC_2.4 symlinkat F
GLIBC_2.4 unlinkat F
GLIBC_2.4 unshare F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.5 __readlinkat_chk F
GLIBC_2.5 inet6_opt_append F
GLIBC_2.5 inet6_opt_find F
GLIBC_2.4 symlinkat F
GLIBC_2.4 unlinkat F
GLIBC_2.4 unshare F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.5 __readlinkat_chk F
GLIBC_2.5 inet6_opt_append F
GLIBC_2.5 inet6_opt_find F
GLIBC_2.4 symlinkat F
GLIBC_2.4 unlinkat F
GLIBC_2.4 unshare F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.5 __readlinkat_chk F
GLIBC_2.5 inet6_opt_append F
GLIBC_2.5 inet6_opt_find F
GLIBC_2.39 stdc_trailing_zeros_ul F
GLIBC_2.39 stdc_trailing_zeros_ull F
GLIBC_2.39 stdc_trailing_zeros_us F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.40 makecontext F
GLIBC_2.40 setcontext F
GLIBC_2.40 swapcontext F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.4 wcstold_l F
GLIBC_2.4 wprintf F
GLIBC_2.4 wscanf F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.5 __readlinkat_chk F
GLIBC_2.5 inet6_opt_append F
GLIBC_2.5 inet6_opt_find F
GLIBC_2.4 wcstold_l F
GLIBC_2.4 wprintf F
GLIBC_2.4 wscanf F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.5 __readlinkat_chk F
GLIBC_2.5 inet6_opt_append F
GLIBC_2.5 inet6_opt_find F
GLIBC_2.4 wcstold_l F
GLIBC_2.4 wprintf F
GLIBC_2.4 wscanf F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.5 __readlinkat_chk F
GLIBC_2.5 inet6_opt_append F
GLIBC_2.5 inet6_opt_find F
GLIBC_2.39 stdc_trailing_zeros_ul F
GLIBC_2.39 stdc_trailing_zeros_ull F
GLIBC_2.39 stdc_trailing_zeros_us F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.39 stdc_trailing_zeros_ull F
GLIBC_2.39 stdc_trailing_zeros_us F
GLIBC_2.40 __riscv_hwprobe F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.39 stdc_trailing_zeros_ull F
GLIBC_2.39 stdc_trailing_zeros_us F
GLIBC_2.40 __riscv_hwprobe F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.4 wcstold_l F
GLIBC_2.4 wprintf F
GLIBC_2.4 wscanf F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.5 __readlinkat_chk F
GLIBC_2.5 inet6_opt_append F
GLIBC_2.5 inet6_opt_find F
GLIBC_2.4 wcstold_l F
GLIBC_2.4 wprintf F
GLIBC_2.4 wscanf F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.5 __readlinkat_chk F
GLIBC_2.5 inet6_opt_append F
GLIBC_2.5 inet6_opt_find F
--- /dev/null
+/* Reading scheduling policy and attributes.
+ Copyright (C) 2024 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 <sched.h>
+#include <sysdep.h>
+
+int
+sched_getattr (pid_t pid, struct sched_attr *attr, unsigned int size,
+ unsigned int flags)
+{
+ return INLINE_SYSCALL_CALL (sched_getattr, pid, attr, size, flags);
+}
--- /dev/null
+/* Setting scheduling policy and attributes.
+ Copyright (C) 2024 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 <sched.h>
+#include <sysdep.h>
+
+int
+sched_setattr (pid_t pid, struct sched_attr *attr, unsigned int flags)
+{
+ return INLINE_SYSCALL_CALL (sched_setattr, pid, attr, flags);
+}
GLIBC_2.4 sys_nerr D 0x4
GLIBC_2.4 unlinkat F
GLIBC_2.4 unshare F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.5 __readlinkat_chk F
GLIBC_2.5 inet6_opt_append F
GLIBC_2.5 inet6_opt_find F
GLIBC_2.4 sys_nerr D 0x4
GLIBC_2.4 unlinkat F
GLIBC_2.4 unshare F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.5 __readlinkat_chk F
GLIBC_2.5 inet6_opt_append F
GLIBC_2.5 inet6_opt_find F
GLIBC_2.4 wcstold_l F
GLIBC_2.4 wprintf F
GLIBC_2.4 wscanf F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.5 __readlinkat_chk F
GLIBC_2.5 inet6_opt_append F
GLIBC_2.5 inet6_opt_find F
GLIBC_2.4 sys_nerr D 0x4
GLIBC_2.4 unlinkat F
GLIBC_2.4 unshare F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.5 __readlinkat_chk F
GLIBC_2.5 inet6_opt_append F
GLIBC_2.5 inet6_opt_find F
--- /dev/null
+/* Tests for sched_setattr and sched_getattr.
+ Copyright (C) 2024 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 <sched.h>
+
+#include <errno.h>
+#include <stddef.h>
+#include <string.h>
+#include <support/check.h>
+#include <sys/resource.h>
+#include <unistd.h>
+
+/* Padding struct to detect unexpected writes. */
+union
+{
+ struct sched_attr attr;
+ /* Hopefully the kernel will never need as much. */
+ unsigned char padding[4096];
+} u;
+
+static void
+check_unused (void)
+{
+ TEST_VERIFY (u.attr.size < sizeof (u));
+ for (unsigned int i = u.attr.size; i < sizeof (u); ++i)
+ TEST_COMPARE (u.padding[i], 0xcc);
+}
+
+static int
+do_test (void)
+{
+ TEST_VERIFY (sizeof (struct sched_attr) < sizeof (u));
+
+ /* Check that reading and re-applying the current policy works. */
+ memset (&u, 0xcc, sizeof (u));
+ /* Compiler barrier to bypass write access attribute. */
+ volatile unsigned int size = sizeof (u);
+ TEST_COMPARE (sched_getattr (0, (struct sched_attr *) &u, size, 0), 0);
+ check_unused ();
+ TEST_COMPARE (sched_setattr (0, &u.attr, 0), 0); /* Apply unchanged. */
+
+ /* Try to switch to the SCHED_OTHER policy. */
+ memset (&u, 0, sizeof (u));
+ u.attr.size = sizeof (u); /* With padding, kernel should accept zeroes. */
+ u.attr.sched_policy = SCHED_OTHER; /* Should be the default. */
+ {
+ errno = 0;
+ int prio = getpriority (PRIO_PROCESS, 0);
+ if (errno != 0)
+ prio = 0;
+ u.attr.sched_nice = prio;
+ }
+ TEST_COMPARE (sched_setattr (0, &u.attr, 0), 0);
+
+ /* Non-zero values not known to the kernel result in an E2BIG error. */
+ memset (&u, 0, sizeof (u));
+ TEST_COMPARE (sched_getattr (0, (struct sched_attr *) &u, size, 0), 0);
+ u.padding[u.attr.size] = 0xcc;
+ u.attr.size = sizeof (u);
+ errno = 0;
+ TEST_COMPARE (sched_setattr (0, &u.attr, 0), -1);
+ TEST_COMPARE (errno, E2BIG);
+
+ memset (&u, 0xcc, sizeof (u));
+ TEST_COMPARE (sched_getattr (0, (struct sched_attr *) &u, size, 0), 0);
+ TEST_COMPARE (u.attr.sched_policy, SCHED_OTHER);
+ check_unused ();
+
+ /* Raise the niceless level to 19 and observe its effect. */
+ TEST_COMPARE (nice (19), 19);
+ TEST_COMPARE (sched_getattr (0, &u.attr, sizeof (u.attr), 0), 0);
+ TEST_COMPARE (u.attr.sched_policy, SCHED_OTHER);
+ TEST_COMPARE (u.attr.sched_nice, 19);
+ check_unused ();
+
+ /* Invalid buffer arguments result in EINVAL (not EFAULT). */
+ {
+ errno = 0;
+ void *volatile null_pointer = NULL; /* compiler barrier. */
+ TEST_COMPARE (sched_setattr (0, null_pointer, 0), -1);
+ TEST_COMPARE (errno, EINVAL);
+ errno = 0;
+ TEST_COMPARE (sched_getattr (0, null_pointer, size, 0), -1);
+ TEST_COMPARE (errno, EINVAL);
+ }
+
+ return 0;
+}
+
+#include <support/test-driver.c>
GLIBC_2.4 sys_nerr D 0x4
GLIBC_2.4 unlinkat F
GLIBC_2.4 unshare F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
GLIBC_2.5 __readlinkat_chk F
GLIBC_2.5 inet6_opt_append F
GLIBC_2.5 inet6_opt_find F
GLIBC_2.39 stdc_trailing_zeros_ul F
GLIBC_2.39 stdc_trailing_zeros_ull F
GLIBC_2.39 stdc_trailing_zeros_us F
+GLIBC_2.41 sched_getattr F
+GLIBC_2.41 sched_setattr F
projects / thirdparty / glibc.git / commitdiff
