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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright Collabora Ltd., 2021
*
* futex cmp requeue test by André Almeida <andrealmeid@collabora.com>
*/
#include <pthread.h>
#include <sys/shm.h>
#include <sys/mman.h>
#include <fcntl.h>
#include "futextest.h"
#include "../../kselftest_harness.h"
#define timeout_ns 30000000
#define WAKE_WAIT_US 10000
#define SHM_PATH "futex_shm_file"
void *futex;
static void *waiterfn(void *arg)
{
struct timespec to;
unsigned int flags = 0;
if (arg)
flags = *((unsigned int *) arg);
to.tv_sec = 0;
to.tv_nsec = timeout_ns;
if (futex_wait(futex, 0, &to, flags))
printf("waiter failed errno %d\n", errno);
return NULL;
}
TEST(private_futex)
{
unsigned int flags = FUTEX_PRIVATE_FLAG;
u_int32_t f_private = 0;
pthread_t waiter;
int res;
futex = &f_private;
/* Testing a private futex */
ksft_print_dbg_msg("Calling private futex_wait on futex: %p\n", futex);
if (pthread_create(&waiter, NULL, waiterfn, (void *) &flags))
ksft_exit_fail_msg("pthread_create failed\n");
usleep(WAKE_WAIT_US);
ksft_print_dbg_msg("Calling private futex_wake on futex: %p\n", futex);
res = futex_wake(futex, 1, FUTEX_PRIVATE_FLAG);
if (res != 1) {
ksft_test_result_fail("futex_wake private returned: %d %s\n",
errno, strerror(errno));
} else {
ksft_test_result_pass("futex_wake private succeeds\n");
}
}
TEST(anon_page)
{
u_int32_t *shared_data;
pthread_t waiter;
int res, shm_id;
/* Testing an anon page shared memory */
shm_id = shmget(IPC_PRIVATE, 4096, IPC_CREAT | 0666);
if (shm_id < 0) {
perror("shmget");
exit(1);
}
shared_data = shmat(shm_id, NULL, 0);
*shared_data = 0;
futex = shared_data;
ksft_print_dbg_msg("Calling shared (page anon) futex_wait on futex: %p\n", futex);
if (pthread_create(&waiter, NULL, waiterfn, NULL))
ksft_exit_fail_msg("pthread_create failed\n");
usleep(WAKE_WAIT_US);
ksft_print_dbg_msg("Calling shared (page anon) futex_wake on futex: %p\n", futex);
res = futex_wake(futex, 1, 0);
if (res != 1) {
ksft_test_result_fail("futex_wake shared (page anon) returned: %d %s\n",
errno, strerror(errno));
} else {
ksft_test_result_pass("futex_wake shared (page anon) succeeds\n");
}
shmdt(shared_data);
}
TEST(file_backed)
{
u_int32_t f_private = 0;
pthread_t waiter;
int res, fd;
void *shm;
/* Testing a file backed shared memory */
fd = open(SHM_PATH, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
if (fd < 0)
ksft_exit_fail_msg("open");
if (ftruncate(fd, sizeof(f_private)))
ksft_exit_fail_msg("ftruncate");
shm = mmap(NULL, sizeof(f_private), PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (shm == MAP_FAILED)
ksft_exit_fail_msg("mmap");
memcpy(shm, &f_private, sizeof(f_private));
futex = shm;
ksft_print_dbg_msg("Calling shared (file backed) futex_wait on futex: %p\n", futex);
if (pthread_create(&waiter, NULL, waiterfn, NULL))
ksft_exit_fail_msg("pthread_create failed\n");
usleep(WAKE_WAIT_US);
ksft_print_dbg_msg("Calling shared (file backed) futex_wake on futex: %p\n", futex);
res = futex_wake(shm, 1, 0);
if (res != 1) {
ksft_test_result_fail("futex_wake shared (file backed) returned: %d %s\n",
errno, strerror(errno));
} else {
ksft_test_result_pass("futex_wake shared (file backed) succeeds\n");
}
munmap(shm, sizeof(f_private));
remove(SHM_PATH);
close(fd);
}
TEST_HARNESS_MAIN
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