1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
/*
* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibTest/TestCase.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <unistd.h>
static u8* private_ptr = nullptr;
static void private_non_empty_inode_vmobject_sync_signal_handler(int)
{
auto rc = msync(private_ptr, 0x1000, MS_ASYNC);
EXPECT(rc == 0);
rc = munmap(private_ptr, 0x1000);
EXPECT(rc == 0);
exit(0);
}
TEST_CASE(private_non_empty_inode_vmobject_sync)
{
{
struct sigaction new_action {
{ private_non_empty_inode_vmobject_sync_signal_handler }, 0, 0
};
int rc = sigaction(SIGBUS, &new_action, nullptr);
VERIFY(rc == 0);
}
u8 buf[0x1000];
memset(buf, 0, sizeof(buf));
int fd = open("/tmp/private_non_empty_msync_test", O_RDWR | O_CREAT, 0644);
VERIFY(fd >= 0);
auto rc = write(fd, buf, sizeof(buf));
VERIFY(rc == sizeof(buf));
private_ptr = (u8*)mmap(nullptr, 0x2000, PROT_READ | PROT_WRITE, MAP_FILE | MAP_PRIVATE, fd, 0);
EXPECT(private_ptr != MAP_FAILED);
rc = msync(private_ptr, 0x2000, MS_ASYNC);
EXPECT(rc == 0);
private_ptr[0x1001] = 0x1;
VERIFY_NOT_REACHED();
}
|
