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tests: perform more strict structure allocation in sched_xetattr test

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Use tail_alloc with precise size of the structure.

* tests/sched_xetattr.c (main): Eliminate usage of anonymous union type.
Rename sched to sched_attr.  Change type of sched_attr to struct
pointer.  Use tail_alloc for sched_attr allocation, update printf
statements accrodingly.
This commit is contained in:
Eugene Syromyatnikov 2016-09-06 05:08:10 +03:00 committed by Dmitry V. Levin
parent e3ed9f557c
commit ee7d47f4d6
1 changed files with 28 additions and 30 deletions
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58
tests/sched_xetattr.c
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@ -37,50 +37,48 @@
int
main(void)
{
static union {
struct {
uint32_t size;
uint32_t sched_policy;
uint64_t sched_flags;
uint32_t sched_nice;
uint32_t sched_priority;
uint64_t sched_runtime;
uint64_t sched_deadline;
uint64_t sched_period;
} attr;
char buf[256];
} sched;
struct {
uint32_t size;
uint32_t sched_policy;
uint64_t sched_flags;
uint32_t sched_nice;
uint32_t sched_priority;
uint64_t sched_runtime;
uint64_t sched_deadline;
uint64_t sched_period;
} *sched_attr = tail_alloc(sizeof(*sched_attr));
if (syscall(__NR_sched_getattr, 0, &sched, sizeof(sched), 0))
if (syscall(__NR_sched_getattr, 0, sched_attr, sizeof(*sched_attr), 0))
perror_msg_and_skip("sched_getattr");
printf("sched_getattr\\(0, \\{size=%u, sched_policy=SCHED_[A-Z]+"
", sched_flags=%s, sched_nice=%u, sched_priority=%u"
", sched_runtime=%" PRIu64 ", sched_deadline=%" PRIu64
", sched_period=%" PRIu64 "\\}, 256, 0\\) += 0\n",
sched.attr.size,
sched.attr.sched_flags ? "SCHED_FLAG_RESET_ON_FORK" : "0",
sched.attr.sched_nice,
sched.attr.sched_priority,
sched.attr.sched_runtime,
sched.attr.sched_deadline,
sched.attr.sched_period);
", sched_period=%" PRIu64 "\\}, %u, 0\\) += 0\n",
sched_attr->size,
sched_attr->sched_flags ? "SCHED_FLAG_RESET_ON_FORK" : "0",
sched_attr->sched_nice,
sched_attr->sched_priority,
sched_attr->sched_runtime,
sched_attr->sched_deadline,
sched_attr->sched_period,
(unsigned) sizeof(*sched_attr));
sched.attr.sched_flags |= 1;
if (syscall(__NR_sched_setattr, 0, &sched, 0))
sched_attr->sched_flags |= 1;
if (syscall(__NR_sched_setattr, 0, sched_attr, 0))
perror_msg_and_skip("sched_setattr");
printf("sched_setattr\\(0, \\{size=%u, sched_policy=SCHED_[A-Z]+"
", sched_flags=%s, sched_nice=%u, sched_priority=%u"
", sched_runtime=%" PRIu64 ", sched_deadline=%" PRIu64
", sched_period=%" PRIu64 "\\}, 0\\) += 0\n",
sched.attr.size,
sched_attr->size,
"SCHED_FLAG_RESET_ON_FORK",
sched.attr.sched_nice,
sched.attr.sched_priority,
sched.attr.sched_runtime,
sched.attr.sched_deadline,
sched.attr.sched_period);
sched_attr->sched_nice,
sched_attr->sched_priority,
sched_attr->sched_runtime,
sched_attr->sched_deadline,
sched_attr->sched_period);
return 0;
}