int main(int argc, char **argv)
{
pthread_t thr;
int ret = RET_PASS;
int res;
int c;
while ((c = getopt(argc, argv, "chv:")) != -1) {
switch (c) {
case 'c':
log_color(1);
break;
case 'h':
usage(basename(argv[0]));
exit(0);
case 'v':
log_verbosity(atoi(optarg));
break;
default:
usage(basename(argv[0]));
exit(1);
}
}
ksft_print_header();
ksft_set_plan(1);
ksft_print_msg(
"%s: Test the futex value of private file mappings in FUTEX_WAIT\n",
basename(argv[0]));
ret = pthread_create(&thr, NULL, thr_futex_wait, NULL);
if (ret < 0) {
fprintf(stderr, "pthread_create error\n");
ret = RET_ERROR;
goto out;
}
info("wait a while\n");
usleep(WAKE_WAIT_US);
val = 2;
res = futex_wake(&val, 1, 0);
info("futex_wake %d\n", res);
if (res != 1) {
fail("FUTEX_WAKE didn't find the waiting thread.\n");
ret = RET_FAIL;
}
info("join\n");
pthread_join(thr, NULL);
out:
print_result(TEST_NAME, ret);
return ret;
}
int main(int argc, char *argv[])
{
int c, ret;
while ((c = getopt(argc, argv, "bchlot:v:")) != -1) {
switch (c) {
case 'b':
broadcast = 1;
break;
case 'c':
log_color(1);
break;
case 'h':
usage(basename(argv[0]));
exit(0);
case 'l':
locked = 1;
break;
case 'o':
owner = 1;
locked = 0;
break;
case 't':
timeout_ns = atoi(optarg);
break;
case 'v':
log_verbosity(atoi(optarg));
break;
default:
usage(basename(argv[0]));
exit(1);
}
}
ksft_print_header();
ksft_print_msg("%s: Test requeue functionality\n", basename(argv[0]));
ksft_print_msg(
"\tArguments: broadcast=%d locked=%d owner=%d timeout=%ldns\n",
broadcast, locked, owner, timeout_ns);
/*
* FIXME: unit_test is obsolete now that we parse options and the
* various style of runs are done by run.sh - simplify the code and move
* unit_test into main()
*/
ret = unit_test(broadcast, locked, owner, timeout_ns);
print_result(TEST_NAME, ret);
return ret;
}
int main(int argc, char *argv[])
{
futex_t f1 = FUTEX_INITIALIZER;
struct timespec to;
int res, ret = RET_PASS;
int c;
while ((c = getopt(argc, argv, "cht:v:")) != -1) {
switch (c) {
case 'c':
log_color(1);
break;
case 'h':
usage(basename(argv[0]));
exit(0);
case 't':
timeout_ns = atoi(optarg);
break;
case 'v':
log_verbosity(atoi(optarg));
break;
default:
usage(basename(argv[0]));
exit(1);
}
}
printf("%s: Block on a futex and wait for timeout\n",
basename(argv[0]));
printf("\tArguments: timeout=%ldns\n", timeout_ns);
/* initialize timeout */
to.tv_sec = 0;
to.tv_nsec = timeout_ns;
info("Calling futex_wait on f1: %u @ %p\n", f1, &f1);
res = futex_wait(&f1, f1, &to, FUTEX_PRIVATE_FLAG);
if (!res || errno != ETIMEDOUT) {
fail("futex_wait returned %d\n", ret < 0 ? errno : ret);
ret = RET_FAIL;
}
print_result(ret);
return ret;
}
int main(int argc, char *argv[])
{
int ret = RET_PASS;
pthread_t child;
int c;
while ((c = getopt(argc, argv, "chv:")) != -1) {
switch (c) {
case 'c':
log_color(1);
break;
case 'h':
usage(basename(argv[0]));
exit(0);
case 'v':
log_verbosity(atoi(optarg));
break;
default:
usage(basename(argv[0]));
exit(1);
}
}
printf("%s: Detect mismatched requeue_pi operations\n",
basename(argv[0]));
if (pthread_create(&child, NULL, blocking_child, NULL)) {
error("pthread_create\n", errno);
ret = RET_ERROR;
goto out;
}
/* Allow the child to block in the kernel. */
sleep(1);
/*
* The kernel should detect the waiter did not setup the
* q->requeue_pi_key and return -EINVAL. If it does not,
* it likely gave the lock to the child, which is now hung
* in the kernel.
*/
ret = futex_cmp_requeue_pi(&f1, f1, &f2, 1, 0, FUTEX_PRIVATE_FLAG);
if (ret < 0) {
if (errno == EINVAL) {
/*
* The kernel correctly detected the mismatched
* requeue_pi target and aborted. Wake the child with
* FUTEX_WAKE.
*/
ret = futex_wake(&f1, 1, FUTEX_PRIVATE_FLAG);
if (ret == 1) {
ret = RET_PASS;
} else if (ret < 0) {
error("futex_wake\n", errno);
ret = RET_ERROR;
} else {
error("futex_wake did not wake the child\n", 0);
ret = RET_ERROR;
}
} else {
error("futex_cmp_requeue_pi\n", errno);
ret = RET_ERROR;
}
} else if (ret > 0) {
fail("futex_cmp_requeue_pi failed to detect the mismatch\n");
ret = RET_FAIL;
} else {
error("futex_cmp_requeue_pi found no waiters\n", 0);
ret = RET_ERROR;
}
pthread_join(child, NULL);
if (!ret)
ret = child_ret;
out:
/* If the kernel crashes, we shouldn't return at all. */
print_result(TEST_NAME, ret);
return ret;
}
int main(int argc, char *argv[])
{
unsigned int old_val;
struct sigaction sa;
pthread_t waiter;
int c, res, ret = RET_PASS;
while ((c = getopt(argc, argv, "chv:")) != -1) {
switch (c) {
case 'c':
log_color(1);
break;
case 'h':
usage(basename(argv[0]));
exit(0);
case 'v':
log_verbosity(atoi(optarg));
break;
default:
usage(basename(argv[0]));
exit(1);
}
}
ksft_print_header();
ksft_set_plan(1);
ksft_print_msg("%s: Test signal handling during requeue_pi\n",
basename(argv[0]));
ksft_print_msg("\tArguments: <none>\n");
sa.sa_handler = handle_signal;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
if (sigaction(SIGUSR1, &sa, NULL)) {
error("sigaction\n", errno);
exit(1);
}
info("m1:f2: %x\n", f2);
info("Creating waiter\n");
res = create_rt_thread(&waiter, waiterfn, NULL, SCHED_FIFO, 1);
if (res) {
error("Creating waiting thread failed", res);
ret = RET_ERROR;
goto out;
}
info("Calling FUTEX_LOCK_PI on f2=%x @ %p\n", f2, &f2);
info("m2:f2: %x\n", f2);
futex_lock_pi(&f2, 0, 0, FUTEX_PRIVATE_FLAG);
info("m3:f2: %x\n", f2);
while (1) {
/*
* signal the waiter before requeue, waiter should automatically
* restart futex_wait_requeue_pi() in the kernel. Wait for the
* waiter to block on f1 again.
*/
info("Issuing SIGUSR1 to waiter\n");
pthread_kill(waiter, SIGUSR1);
usleep(DELAY_US);
info("Requeueing waiter via FUTEX_CMP_REQUEUE_PI\n");
old_val = f1;
res = futex_cmp_requeue_pi(&f1, old_val, &(f2), 1, 0,
FUTEX_PRIVATE_FLAG);
/*
* If res is non-zero, we either requeued the waiter or hit an
* error, break out and handle it. If it is zero, then the
* signal may have hit before the the waiter was blocked on f1.
* Try again.
*/
if (res > 0) {
atomic_set(&requeued, 1);
break;
} else if (res < 0) {
error("FUTEX_CMP_REQUEUE_PI failed\n", errno);
ret = RET_ERROR;
break;
}
}
info("m4:f2: %x\n", f2);
/*
* Signal the waiter after requeue, waiter should return from
* futex_wait_requeue_pi() with EWOULDBLOCK. Join the thread here so the
* futex_unlock_pi() can't happen before the signal wakeup is detected
* in the kernel.
*/
info("Issuing SIGUSR1 to waiter\n");
pthread_kill(waiter, SIGUSR1);
info("Waiting for waiter to return\n");
pthread_join(waiter, NULL);
info("Calling FUTEX_UNLOCK_PI on mutex=%x @ %p\n", f2, &f2);
futex_unlock_pi(&f2, FUTEX_PRIVATE_FLAG);
info("m5:f2: %x\n", f2);
out:
if (ret == RET_PASS && waiter_ret)
ret = waiter_ret;
print_result(TEST_NAME, ret);
return ret;
}
