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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 <fcntl.h>
#include <pthread.h>
#include <stdlib.h>
#include <sys/shm.h>
#include <sys/mman.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;
struct waiter_args {
struct __test_metadata *_metadata;
unsigned int flags;
};
static void *waiterfn(void *arg)
{
struct waiter_args *args = (struct waiter_args *)arg;
struct __test_metadata *_metadata = args->_metadata;
struct timespec to;
int res;
to.tv_sec = 0;
to.tv_nsec = timeout_ns;
res = futex_wait(futex, 0, &to, args->flags);
if (res) {
EXPECT_EQ(res, 0)
TH_LOG("waiter failed errno %d: %s", errno, strerror(errno));
}
free(args);
return NULL;
}
TEST(private_futex)
{
struct waiter_args *args = malloc(sizeof(*args));
u_int32_t f_private = 0;
pthread_t waiter;
int res;
args->_metadata = _metadata;
args->flags = FUTEX_PRIVATE_FLAG;
futex = &f_private;
/* Testing a private futex */
TH_LOG("Calling private futex_wait on futex: %p", futex);
ASSERT_EQ(pthread_create(&waiter, NULL, waiterfn, args), 0)
TH_LOG("pthread_create failed");
usleep(WAKE_WAIT_US);
TH_LOG("Calling private futex_wake on futex: %p", futex);
res = futex_wake(futex, 1, FUTEX_PRIVATE_FLAG);
EXPECT_EQ(res, 1)
TH_LOG("futex_wake private returned: %d %s", res, res < 0 ? strerror(errno) : "");
pthread_join(waiter, NULL);
}
TEST(anon_page)
{
struct waiter_args *args = malloc(sizeof(*args));
u_int32_t *shared_data;
pthread_t waiter;
int res, shm_id;
args->_metadata = _metadata;
args->flags = 0;
/* Testing an anon page shared memory */
shm_id = shmget(IPC_PRIVATE, 4096, IPC_CREAT | 0666);
if (shm_id < 0) {
if (errno == ENOSYS) {
free(args);
SKIP(return, "shmget syscall not supported");
}
ASSERT_GE(shm_id, 0)
TH_LOG("shmget failed: %s", strerror(errno));
}
shared_data = shmat(shm_id, NULL, 0);
if (shared_data == (void *)-1) {
free(args);
ASSERT_NE(shared_data, (void *)-1)
TH_LOG("shmat failed: %s", strerror(errno));
}
*shared_data = 0;
futex = shared_data;
TH_LOG("Calling shared (page anon) futex_wait on futex: %p", futex);
ASSERT_EQ(pthread_create(&waiter, NULL, waiterfn, args), 0)
TH_LOG("pthread_create failed");
usleep(WAKE_WAIT_US);
TH_LOG("Calling shared (page anon) futex_wake on futex: %p", futex);
res = futex_wake(futex, 1, 0);
EXPECT_EQ(res, 1) {
TH_LOG("futex_wake shared (page anon) returned: %d %s",
res, res < 0 ? strerror(errno) : "");
}
pthread_join(waiter, NULL);
shmdt(shared_data);
}
TEST(file_backed)
{
struct waiter_args *args = malloc(sizeof(*args));
u_int32_t f_private = 0;
pthread_t waiter;
int res, fd;
void *shm;
args->_metadata = _metadata;
args->flags = 0;
/* Testing a file backed shared memory */
fd = open(SHM_PATH, O_RDWR | O_CREAT, 0600);
if (fd < 0) {
free(args);
ASSERT_GE(fd, 0)
TH_LOG("open failed: %s", strerror(errno));
}
if (ftruncate(fd, sizeof(f_private))) {
free(args);
close(fd);
ASSERT_TRUE(0)
TH_LOG("ftruncate failed: %s", strerror(errno));
}
shm = mmap(NULL, sizeof(f_private), PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (shm == MAP_FAILED) {
free(args);
close(fd);
ASSERT_NE(shm, MAP_FAILED)
TH_LOG("mmap failed: %s", strerror(errno));
}
memcpy(shm, &f_private, sizeof(f_private));
futex = shm;
TH_LOG("Calling shared (file backed) futex_wait on futex: %p", futex);
ASSERT_EQ(pthread_create(&waiter, NULL, waiterfn, args), 0)
TH_LOG("pthread_create failed");
usleep(WAKE_WAIT_US);
TH_LOG("Calling shared (file backed) futex_wake on futex: %p", futex);
res = futex_wake(shm, 1, 0);
EXPECT_EQ(res, 1) {
TH_LOG("futex_wake shared (file backed) returned: %d %s",
res, res < 0 ? strerror(errno) : "");
}
pthread_join(waiter, NULL);
munmap(shm, sizeof(f_private));
remove(SHM_PATH);
close(fd);
}
TEST_HARNESS_MAIN
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