diff options
Diffstat (limited to 'tools/testing/selftests/vm/map_fixed_noreplace.c')
| -rw-r--r-- | tools/testing/selftests/vm/map_fixed_noreplace.c | 206 |
1 files changed, 0 insertions, 206 deletions
diff --git a/tools/testing/selftests/vm/map_fixed_noreplace.c b/tools/testing/selftests/vm/map_fixed_noreplace.c deleted file mode 100644 index d91bde511268..000000000000 --- a/tools/testing/selftests/vm/map_fixed_noreplace.c +++ /dev/null @@ -1,206 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 - -/* - * Test that MAP_FIXED_NOREPLACE works. - * - * Copyright 2018, Jann Horn <jannh@google.com> - * Copyright 2018, Michael Ellerman, IBM Corporation. - */ - -#include <sys/mman.h> -#include <errno.h> -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> - -#ifndef MAP_FIXED_NOREPLACE -#define MAP_FIXED_NOREPLACE 0x100000 -#endif - -#define BASE_ADDRESS (256ul * 1024 * 1024) - - -static void dump_maps(void) -{ - char cmd[32]; - - snprintf(cmd, sizeof(cmd), "cat /proc/%d/maps", getpid()); - system(cmd); -} - -int main(void) -{ - unsigned long flags, addr, size, page_size; - char *p; - - page_size = sysconf(_SC_PAGE_SIZE); - - flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED_NOREPLACE; - - // Check we can map all the areas we need below - errno = 0; - addr = BASE_ADDRESS; - size = 5 * page_size; - p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0); - - printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p); - - if (p == MAP_FAILED) { - dump_maps(); - printf("Error: couldn't map the space we need for the test\n"); - return 1; - } - - errno = 0; - if (munmap((void *)addr, 5 * page_size) != 0) { - dump_maps(); - printf("Error: munmap failed!?\n"); - return 1; - } - printf("unmap() successful\n"); - - errno = 0; - addr = BASE_ADDRESS + page_size; - size = 3 * page_size; - p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0); - printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p); - - if (p == MAP_FAILED) { - dump_maps(); - printf("Error: first mmap() failed unexpectedly\n"); - return 1; - } - - /* - * Exact same mapping again: - * base | free | new - * +1 | mapped | new - * +2 | mapped | new - * +3 | mapped | new - * +4 | free | new - */ - errno = 0; - addr = BASE_ADDRESS; - size = 5 * page_size; - p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0); - printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p); - - if (p != MAP_FAILED) { - dump_maps(); - printf("Error:1: mmap() succeeded when it shouldn't have\n"); - return 1; - } - - /* - * Second mapping contained within first: - * - * base | free | - * +1 | mapped | - * +2 | mapped | new - * +3 | mapped | - * +4 | free | - */ - errno = 0; - addr = BASE_ADDRESS + (2 * page_size); - size = page_size; - p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0); - printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p); - - if (p != MAP_FAILED) { - dump_maps(); - printf("Error:2: mmap() succeeded when it shouldn't have\n"); - return 1; - } - - /* - * Overlap end of existing mapping: - * base | free | - * +1 | mapped | - * +2 | mapped | - * +3 | mapped | new - * +4 | free | new - */ - errno = 0; - addr = BASE_ADDRESS + (3 * page_size); - size = 2 * page_size; - p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0); - printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p); - - if (p != MAP_FAILED) { - dump_maps(); - printf("Error:3: mmap() succeeded when it shouldn't have\n"); - return 1; - } - - /* - * Overlap start of existing mapping: - * base | free | new - * +1 | mapped | new - * +2 | mapped | - * +3 | mapped | - * +4 | free | - */ - errno = 0; - addr = BASE_ADDRESS; - size = 2 * page_size; - p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0); - printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p); - - if (p != MAP_FAILED) { - dump_maps(); - printf("Error:4: mmap() succeeded when it shouldn't have\n"); - return 1; - } - - /* - * Adjacent to start of existing mapping: - * base | free | new - * +1 | mapped | - * +2 | mapped | - * +3 | mapped | - * +4 | free | - */ - errno = 0; - addr = BASE_ADDRESS; - size = page_size; - p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0); - printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p); - - if (p == MAP_FAILED) { - dump_maps(); - printf("Error:5: mmap() failed when it shouldn't have\n"); - return 1; - } - - /* - * Adjacent to end of existing mapping: - * base | free | - * +1 | mapped | - * +2 | mapped | - * +3 | mapped | - * +4 | free | new - */ - errno = 0; - addr = BASE_ADDRESS + (4 * page_size); - size = page_size; - p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0); - printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p); - - if (p == MAP_FAILED) { - dump_maps(); - printf("Error:6: mmap() failed when it shouldn't have\n"); - return 1; - } - - addr = BASE_ADDRESS; - size = 5 * page_size; - if (munmap((void *)addr, size) != 0) { - dump_maps(); - printf("Error: munmap failed!?\n"); - return 1; - } - printf("unmap() successful\n"); - - printf("OK\n"); - return 0; -} |