jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <LibTest/TestCase.h>
8#include <errno.h>
9#include <fcntl.h>
10#include <signal.h>
11#include <sys/mman.h>
12
13static u8* shared_ptr = nullptr;
14
15static void shared_zero_length_inode_vmobject_sync_signal_handler(int)
16{
17 auto rc = msync(shared_ptr, 0x1000, MS_ASYNC);
18 EXPECT(rc == 0);
19 rc = munmap(shared_ptr, 0x1000);
20 EXPECT(rc == 0);
21 exit(0);
22}
23
24TEST_CASE(shared_zero_length_inode_vmobject_sync)
25{
26 {
27 struct sigaction new_action {
28 { shared_zero_length_inode_vmobject_sync_signal_handler }, 0, 0
29 };
30 int rc = sigaction(SIGBUS, &new_action, nullptr);
31 VERIFY(rc == 0);
32 }
33 int fd = open("/tmp/shared_msync_test", O_RDWR | O_CREAT, 0644);
34 VERIFY(fd >= 0);
35 shared_ptr = (u8*)mmap(nullptr, 0x1000, PROT_READ | PROT_WRITE, MAP_FILE | MAP_SHARED, fd, 0);
36 EXPECT(shared_ptr != MAP_FAILED);
37 shared_ptr[0] = 0x1;
38 VERIFY_NOT_REACHED();
39}