sched: enhance decoding of sched_setattr syscall

[strace] / tests / sched_xetattr.c

diff --git a/tests/sched_xetattr.c b/tests/sched_xetattr.c
index f3d2b3772c73b150274812dd09cfaaedf5ee49ce..23eb19cfd1587713af1fbf11a8d813f988d74deb 100644 (file)
--- a/tests/sched_xetattr.c
+++ b/tests/sched_xetattr.c
@@ -68,6 +68,7 @@ main(void)
                (kernel_ulong_t) 0xdefaceddeadc0deULL;
 
        struct sched_attr *const attr = tail_alloc(sizeof(*attr));
+       unsigned int *const psize = tail_alloc(sizeof(*psize));
        void *const efault = attr + 1;
 
        sys_sched_getattr(0, 0, 0, 0);
@@ -150,6 +151,38 @@ main(void)
               attr->sched_deadline,
               attr->sched_period);
 
+       *psize = attr->size;
+
+       sys_sched_setattr(0, (unsigned long) psize, 0);
+       printf("sched_setattr(0, %p, 0) = %s\n", psize, errstr);
+
+       attr->size = 0;
+
+       sys_sched_setattr(0, (unsigned long) attr, 0);
+       printf("sched_setattr(0, {size=%u, sched_policy=", attr->size);
+       printxval(schedulers, attr->sched_policy, NULL);
+       printf(", sched_flags=%s, sched_nice=%d, sched_priority=%u"
+              ", sched_runtime=%" PRIu64 ", sched_deadline=%" PRIu64
+              ", sched_period=%" PRIu64 "}, 0) = 0\n",
+              "SCHED_FLAG_RESET_ON_FORK",
+              attr->sched_nice,
+              attr->sched_priority,
+              attr->sched_runtime,
+              attr->sched_deadline,
+              attr->sched_period);
+
+       attr->size = 1;
+
+       sys_sched_setattr(0, (unsigned long) attr, 0);
+       printf("sched_setattr(0, {size=%u} => {size=%u}, 0) = %s\n",
+              1, attr->size, errstr);
+
+       attr->size = SCHED_ATTR_MIN_SIZE - 1;
+
+       sys_sched_setattr(0, (unsigned long) attr, 0);
+       printf("sched_setattr(0, {size=%u} => {size=%u}, 0) = %s\n",
+              SCHED_ATTR_MIN_SIZE - 1, attr->size, errstr);
+
        attr->size = 0x90807060;
        attr->sched_policy = 0xca7faced;
        attr->sched_flags = 0xbadc0ded1057da7aULL;
@@ -163,7 +196,7 @@ main(void)
        printf("sched_setattr(%d, {size=%u, sched_policy=%#x /* SCHED_??? */, "
               "sched_flags=%#" PRIx64 " /* SCHED_FLAG_??? */, "
               "sched_nice=%d, sched_priority=%u, sched_runtime=%" PRIu64 ", "
-              "sched_deadline=%" PRIu64 ", sched_period=%" PRIu64 "}, %u)"
+              "sched_deadline=%" PRIu64 ", sched_period=%" PRIu64 ", ...}, %u)"
               " = %s\n",
               (int) bogus_pid,
               attr->size,