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Kernel: Add Test for munmap of multiple regions

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Tests: Improve munmap-test

We now Unmap page aligned and check if the regions were really unmappped etc.

Tests: Cleanup Munmap-test

added a cleanup and removed a useless cast
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Hendiadyoin1 2021-02-28 01:55:49 +01:00 • committed by Andreas Kling
parent eba3fa5e72
commit 7f60090c43
1 changed files with 126 additions and 0 deletions
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126
Userland/Tests/Kernel/munmap-multi-region-unmapping.cpp Normal file
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/*
* Copyright (c) 2021, the SerenityOS developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/Types.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <sys/mman.h>
#include <unistd.h>
int main()
{
{
printf("Testing full unnmap\n");
auto* map1 = mmap(nullptr, 2 * PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, 0, 0);
if (map1 == MAP_FAILED) {
perror("mmap 1");
return 1;
}
auto* map2 = mmap((void*)((FlatPtr)map1 + 2 * PAGE_SIZE), 2 * PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, 0, 0);
if (map2 == MAP_FAILED) {
perror("mmap 2");
return 1;
}
((u32*)map1)[0] = 0x41414141;
((u32*)map1)[PAGE_SIZE / sizeof(u32)] = 0x42424242;
((u32*)map2)[0] = 0xbeefbeef;
((u32*)map2)[PAGE_SIZE / sizeof(u32)] = 0xc0dec0de;
if (((u32*)map1)[0] != 0x41414141 || ((u32*)map1)[PAGE_SIZE / sizeof(u32)] != 0x42424242
|| ((u32*)map2)[0] != 0xbeefbeef || ((u32*)map2)[PAGE_SIZE / sizeof(u32)] != 0xc0dec0de) {
perror("write");
return 1;
}
int res = munmap(map1, 4 * PAGE_SIZE);
if (res < 0) {
perror("unmap");
return 1;
}
}
{
printf("Testing partial unmaping\n");
auto* map1 = mmap(nullptr, 2 * PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, 0, 0);
if (map1 == MAP_FAILED) {
perror("mmap 1");
return 1;
}
auto* map2 = mmap((void*)((FlatPtr)map1 + 2 * PAGE_SIZE), 2 * PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, 0, 0);
if (map2 == MAP_FAILED) {
perror("mmap 2");
return 1;
}
((u32*)map1)[0] = 0x41414141;
((u32*)map1)[PAGE_SIZE / sizeof(u32)] = 0x42424242;
((u32*)map2)[0] = 0xbeefbeef;
((u32*)map2)[PAGE_SIZE / sizeof(u32)] = 0xc0dec0de;
if (((u32*)map1)[0] != 0x41414141 || ((u32*)map1)[PAGE_SIZE / sizeof(u32)] != 0x42424242
|| ((u32*)map2)[0] != 0xbeefbeef || ((u32*)map2)[PAGE_SIZE / sizeof(u32)] != 0xc0dec0de) {
perror("write");
return 1;
}
int res = munmap((void*)((FlatPtr)map1 + PAGE_SIZE), 2 * PAGE_SIZE);
if (res < 0) {
perror("unmap");
return 1;
}
auto* map3 = mmap((void*)((FlatPtr)map1 + PAGE_SIZE), PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, 0, 0);
if (map3 == MAP_FAILED) {
perror("remap 1");
return 1;
}
auto* map4 = mmap(map2, PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, 0, 0);
if (map4 == MAP_FAILED) {
perror("remap 2");
return 1;
}
((u32*)map3)[0] = 0x13371337;
((u32*)map4)[0] = 0x1b1b1b1b;
if (((u32*)map1)[0] != 0x41414141 || ((u32*)map2)[PAGE_SIZE / sizeof(u32)] != 0xc0dec0de
|| ((u32*)map3)[0] != 0x13371337 || ((u32*)map4)[0] != 0x1b1b1b1b
|| ((u32*)map1)[PAGE_SIZE / sizeof(int)] != ((u32*)map3)[0] || ((u32*)map2)[0] != ((u32*)map4)[0]) {
perror("read at old map and write at remap");
return 1;
}
res = munmap(map1, PAGE_SIZE * 4);
if (res < 0) {
perror("cleanup");
return 1;
}
}
printf("PASS\n");
return 0;
}