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Kernel: Add a test for multi-region mprotect

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Hediadyoin1 2021-05-08 11:08:50 +02:00 • committed by Andreas Kling
parent ef425a02f7
commit 5a8c220101
1 changed files with 75 additions and 0 deletions
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Tests/Kernel/mprotect-multi-region-mrotect.cpp Normal file
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/*
* Copyright (c) 2021, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Format.h>
#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;
}
auto* map3 = mmap((void*)((FlatPtr)map1 + 4 * PAGE_SIZE), 2 * PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, 0, 0);
if (map3 == MAP_FAILED) {
perror("mmap 3");
return 1;
}
// really allocating pages
memset(map1, 0x01, 6 * PAGE_SIZE);
int rc;
outln("Mprotect 3 ranges [2, 2 ,2]");
rc = mprotect(map1, 6 * PAGE_SIZE, PROT_READ);
if (rc) {
perror("mprotect full");
return 1;
}
outln("Mprotect 3 ranges [-1, 2 ,1-]");
rc = mprotect((void*)((FlatPtr)map1 + PAGE_SIZE), 4 * PAGE_SIZE, PROT_READ);
if (rc) {
perror("mprotect partial");
return 1;
}
outln("unmapping");
munmap(map2, 2 * PAGE_SIZE);
outln("Mprotect 2 ranges [2, -- ,2] -> Error");
rc = mprotect(map1, 6 * PAGE_SIZE, PROT_READ);
if (!rc) {
perror("mprotect full over missing succeded");
return 1;
}
outln("Mprotect 3 ranges [-1, -- ,1-] -> Error");
rc = mprotect((void*)((FlatPtr)map1 + PAGE_SIZE), 4 * PAGE_SIZE, PROT_READ);
if (!rc) {
perror("mprotect partial over missing succeeded");
return 1;
}
//cleanup
munmap(map1, 6 * PAGE_SIZE);
outln("PASS");
return 0;
}