selftests/mm/mremap_dontunmap.c

52 	void *dest_mapping =
55 	if (dest_mapping == MAP_FAILED) {
58 		BUG_ON(munmap(dest_mapping, num_pages * page_size) == -1,
107 	void *dest_mapping =
110 	BUG_ON(dest_mapping == MAP_FAILED, "mremap");
113 	// the dest_mapping contains a's.
115 	       (dest_mapping, num_pages * page_size, 'a') != 0,
121 	BUG_ON(munmap(dest_mapping, num_pages * page_size) == -1,
149 	void *dest_mapping =
152 	if (dest_mapping == MAP_FAILED && errno == EINVAL) {
159 	BUG_ON(dest_mapping == MAP_FAILED, "mremap");
162 	// the dest_mapping contains a's.
164 	       (dest_mapping, num_pages * page_size, 'a') != 0,
173 	BUG_ON(munmap(dest_mapping, num_pages * page_size) == -1,
189 	void *dest_mapping =
192 	BUG_ON(dest_mapping == MAP_FAILED, "mmap");
193 	memset(dest_mapping, 'X', num_pages * page_size);
204 		   dest_mapping);
206 	BUG_ON(remapped_mapping != dest_mapping,
207 	       "mremap should have placed the remapped mapping at dest_mapping");
212 	       (dest_mapping, num_pages * page_size, 'a') != 0,
220 	BUG_ON(munmap(dest_mapping, num_pages * page_size) == -1,
253 	void *dest_mapping =
257 	BUG_ON(dest_mapping == MAP_FAILED, "mremap");
268 	BUG_ON(check_region_contains_byte(dest_mapping, 5 * page_size, 'a') !=
271 	BUG_ON(munmap(dest_mapping, 5 * page_size) == -1,
305 	void *dest_mapping =
308 	BUG_ON(dest_mapping == MAP_FAILED, "mmap");
309 	memset(dest_mapping, 'X', 10 * page_size);
315 		   MREMAP_DONTUNMAP | MREMAP_MAYMOVE | MREMAP_FIXED, dest_mapping);
316 	BUG_ON(dest_mapping == MAP_FAILED, "mremap");
317 	BUG_ON(dest_mapping != remapped_mapping, "expected to remap to dest_mapping");
323 	BUG_ON(check_region_contains_byte(dest_mapping, 5 * page_size, 'a') != 0,
327 	BUG_ON(check_region_contains_byte(dest_mapping + (5 * page_size),
331 	BUG_ON(munmap(dest_mapping, 10 * page_size) == -1,