ladybird/Tests/Kernel/TestEmptySharedInodeVMObject.cpp
Andrew Kaster 1cd3826ad6 Userland+Tests: Don't use MAP_FILE when mmap-ing
MAP_FILE is not in POSIX, and is simply in most LibCs as a "default"
mode. Our own LibC defines it as 0, meaning "no flags". It is also not
defined in some OS's, such as Haiku. Let's be more portable and not use
the unnecessary flag.
2023-09-01 19:50:35 +02:00

40 lines
1012 B
C++

/*
* 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 <sys/mman.h>
static u8* shared_ptr = nullptr;
static void shared_zero_length_inode_vmobject_sync_signal_handler(int)
{
auto rc = msync(shared_ptr, 0x1000, MS_ASYNC);
EXPECT(rc == 0);
rc = munmap(shared_ptr, 0x1000);
EXPECT(rc == 0);
exit(0);
}
TEST_CASE(shared_zero_length_inode_vmobject_sync)
{
{
struct sigaction new_action {
{ shared_zero_length_inode_vmobject_sync_signal_handler }, 0, 0
};
int rc = sigaction(SIGBUS, &new_action, nullptr);
VERIFY(rc == 0);
}
int fd = open("/tmp/shared_msync_test", O_RDWR | O_CREAT, 0644);
VERIFY(fd >= 0);
shared_ptr = (u8*)mmap(nullptr, 0x1000, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
EXPECT(shared_ptr != MAP_FAILED);
shared_ptr[0] = 0x1;
VERIFY_NOT_REACHED();
}