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Kernel: Add a test for multi-region mprotect
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/* | ||
* Copyright (c) 2021, the SerenityOS developers. | ||
* | ||
* SPDX-License-Identifier: BSD-2-Clause | ||
*/ | ||
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#include <AK/Format.h> | ||
#include <AK/Types.h> | ||
#include <fcntl.h> | ||
#include <stdio.h> | ||
#include <string.h> | ||
#include <sys/mman.h> | ||
#include <unistd.h> | ||
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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; | ||
} | ||
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// really allocating pages | ||
memset(map1, 0x01, 6 * PAGE_SIZE); | ||
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int rc; | ||
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outln("Mprotect 3 ranges [2, 2 ,2]"); | ||
rc = mprotect(map1, 6 * PAGE_SIZE, PROT_READ); | ||
if (rc) { | ||
perror("mprotect full"); | ||
return 1; | ||
} | ||
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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; | ||
} | ||
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outln("unmapping"); | ||
munmap(map2, 2 * PAGE_SIZE); | ||
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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; | ||
} | ||
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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; | ||
} | ||
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//cleanup | ||
munmap(map1, 6 * PAGE_SIZE); | ||
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outln("PASS"); | ||
return 0; | ||
} |