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/* SPDX-License-Identifier: MIT */
/*
* Description: Race fdinfo reading with SQPOLL thread exiting
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/types.h>
#include <pthread.h>
#include "helpers.h"
#include "liburing.h"
struct data {
struct io_uring ring;
pthread_t thread;
pthread_barrier_t barrier;
volatile int done;
};
static int rand_between(int a, int b)
{
return a + rand() % (b - a + 1);
}
static void *fdinfo_read(void *__data)
{
struct data *d = __data;
char fd_name[128];
char *buf;
int fd;
buf = malloc(4096);
sprintf(fd_name, "/proc/self/fdinfo/%d", d->ring.ring_fd);
fd = open(fd_name, O_RDONLY);
if (fd < 0) {
perror("open");
return NULL;
}
pthread_barrier_wait(&d->barrier);
do {
int ret = read(fd, buf, 4096);
if (ret < 0) {
perror("fdinfo read");
break;
}
} while (!d->done);
close(fd);
free(buf);
return NULL;
}
static int __test(void)
{
struct data d = { };
void *tret;
int ret;
ret = t_create_ring(8, &d.ring, IORING_SETUP_SQPOLL);
if (ret == T_SETUP_SKIP)
exit(T_EXIT_SKIP);
else if (ret < 0)
exit(T_EXIT_FAIL);
pthread_barrier_init(&d.barrier, NULL, 2);
pthread_create(&d.thread, NULL, fdinfo_read, &d);
pthread_barrier_wait(&d.barrier);
usleep(rand_between(1000, 100000));
d.done = 1;
pthread_join(d.thread, &tret);
exit(T_EXIT_PASS);
}
static int test(void)
{
pid_t pid;
pid = fork();
if (pid) {
int wstatus;
usleep(rand_between(10, 2000));
kill(pid, SIGINT);
waitpid(pid, &wstatus, 0);
} else {
return __test();
}
return T_EXIT_PASS;
}
int main(int argc, char *argv[])
{
int i, ret;
if (argc > 1)
return T_EXIT_SKIP;
for (i = 0; i < 1000; i++) {
ret = test();
if (ret == T_EXIT_SKIP) {
return T_EXIT_SKIP;
} else if (ret) {
fprintf(stderr, "test failed\n");
return T_EXIT_FAIL;
}
}
return T_EXIT_PASS;
}
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