mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-01-08 04:15:23 +03:00
cf0dbc9069
To ensure everything works as expected, a unit test was added with multiple scenarios. This binary has to have the SetUID flag, and we also bind-mount the /usr/Tests directory to allow running of SetUID binaries.
52 lines
1.3 KiB
C++
52 lines
1.3 KiB
C++
/*
|
|
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/Types.h>
|
|
#include <LibTest/TestCase.h>
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/mman.h>
|
|
#include <unistd.h>
|
|
|
|
static ALWAYS_INLINE bool mem_chunk(int fd, u64 base, u64 length)
|
|
{
|
|
u64 mmoffset = base % sysconf(_SC_PAGESIZE);
|
|
void* mmp = mmap(NULL, mmoffset + length, PROT_READ, MAP_SHARED, fd, base - mmoffset);
|
|
return mmp != MAP_FAILED;
|
|
}
|
|
|
|
TEST_CASE(test_memory_access_device_mmap)
|
|
{
|
|
int rc = geteuid();
|
|
EXPECT_EQ(rc, 0);
|
|
|
|
int fd = open("/dev/mem", O_RDONLY);
|
|
EXPECT_EQ(fd < 0, false);
|
|
|
|
// FIXME: This is expected to work on QEMU machines (both 440FX and Q35),
|
|
// however, it will be much nicer to have some sort of a node in the ProcFS
|
|
// to expose physical memory ranges (e820 memory map).
|
|
|
|
auto result = mem_chunk(fd, 0xe0000, 0x100000 - 0xe0000);
|
|
EXPECT_EQ(result, true);
|
|
|
|
result = mem_chunk(fd, 0x100000, 0x200000 - 0x100000);
|
|
EXPECT_EQ(result, false);
|
|
|
|
result = mem_chunk(fd, 0xf0000, 70000);
|
|
EXPECT_EQ(result, false);
|
|
|
|
result = mem_chunk(fd, 0xfffc0000, 16384);
|
|
EXPECT_EQ(result, true);
|
|
|
|
result = mem_chunk(fd, 0xfffc0000, 0x100000);
|
|
EXPECT_EQ(result, false);
|
|
}
|