edgar_igl | e1ffb0f | 2008-03-01 22:23:17 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Small test program to verify simulated mmap behaviour. |
| 3 | * |
| 4 | * When running qemu-linux-user with the -p flag, you may need to tell |
| 5 | * this test program about the pagesize because getpagesize() will not reflect |
| 6 | * the -p choice. Simply pass one argument beeing the pagesize. |
| 7 | * |
| 8 | * Copyright (c) 2007 AXIS Communications AB |
| 9 | * Written by Edgar E. Iglesias. |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License as published by |
| 13 | * the Free Software Foundation; either version 2 of the License, or |
| 14 | * (at your option) any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
Blue Swirl | 8167ee8 | 2009-07-16 20:47:01 +0000 | [diff] [blame] | 22 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
edgar_igl | e1ffb0f | 2008-03-01 22:23:17 +0000 | [diff] [blame] | 23 | */ |
| 24 | |
| 25 | #include <stdio.h> |
| 26 | #include <stdlib.h> |
| 27 | #include <stdint.h> |
| 28 | #include <string.h> |
| 29 | #include <unistd.h> |
| 30 | |
| 31 | #include <sys/mman.h> |
| 32 | |
| 33 | #define D(x) |
| 34 | |
| 35 | #define fail_unless(x) \ |
| 36 | do \ |
| 37 | { \ |
| 38 | if (!(x)) { \ |
| 39 | fprintf (stderr, "FAILED at %s:%d\n", __FILE__, __LINE__); \ |
| 40 | exit (EXIT_FAILURE); \ |
| 41 | } \ |
| 42 | } while (0); |
| 43 | |
| 44 | unsigned char *dummybuf; |
| 45 | static unsigned int pagesize; |
| 46 | static unsigned int pagemask; |
| 47 | int test_fd; |
| 48 | size_t test_fsize; |
| 49 | |
| 50 | void check_aligned_anonymous_unfixed_mmaps(void) |
| 51 | { |
| 52 | void *p1; |
| 53 | void *p2; |
| 54 | void *p3; |
| 55 | void *p4; |
| 56 | void *p5; |
| 57 | uintptr_t p; |
| 58 | int i; |
| 59 | |
| 60 | fprintf (stderr, "%s", __func__); |
| 61 | for (i = 0; i < 0x1fff; i++) |
| 62 | { |
| 63 | size_t len; |
| 64 | |
| 65 | len = pagesize + (pagesize * i & 7); |
| 66 | p1 = mmap(NULL, len, PROT_READ, |
| 67 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
| 68 | p2 = mmap(NULL, len, PROT_READ, |
| 69 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
| 70 | p3 = mmap(NULL, len, PROT_READ, |
| 71 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
| 72 | p4 = mmap(NULL, len, PROT_READ, |
| 73 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
| 74 | p5 = mmap(NULL, len, PROT_READ, |
| 75 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
| 76 | |
| 77 | /* Make sure we get pages aligned with the pagesize. The |
| 78 | target expects this. */ |
| 79 | fail_unless (p1 != MAP_FAILED); |
| 80 | fail_unless (p2 != MAP_FAILED); |
| 81 | fail_unless (p3 != MAP_FAILED); |
| 82 | fail_unless (p4 != MAP_FAILED); |
| 83 | fail_unless (p5 != MAP_FAILED); |
| 84 | p = (uintptr_t) p1; |
| 85 | D(printf ("p=%x\n", p)); |
| 86 | fail_unless ((p & pagemask) == 0); |
| 87 | p = (uintptr_t) p2; |
| 88 | fail_unless ((p & pagemask) == 0); |
| 89 | p = (uintptr_t) p3; |
| 90 | fail_unless ((p & pagemask) == 0); |
| 91 | p = (uintptr_t) p4; |
| 92 | fail_unless ((p & pagemask) == 0); |
| 93 | p = (uintptr_t) p5; |
| 94 | fail_unless ((p & pagemask) == 0); |
| 95 | |
| 96 | /* Make sure we can read from the entire area. */ |
| 97 | memcpy (dummybuf, p1, pagesize); |
| 98 | memcpy (dummybuf, p2, pagesize); |
| 99 | memcpy (dummybuf, p3, pagesize); |
| 100 | memcpy (dummybuf, p4, pagesize); |
| 101 | memcpy (dummybuf, p5, pagesize); |
| 102 | |
| 103 | munmap (p1, len); |
| 104 | munmap (p2, len); |
| 105 | munmap (p3, len); |
| 106 | munmap (p4, len); |
| 107 | munmap (p5, len); |
| 108 | } |
| 109 | fprintf (stderr, " passed\n"); |
| 110 | } |
| 111 | |
| 112 | void check_large_anonymous_unfixed_mmap(void) |
| 113 | { |
| 114 | void *p1; |
| 115 | uintptr_t p; |
| 116 | size_t len; |
| 117 | |
| 118 | fprintf (stderr, "%s", __func__); |
| 119 | |
| 120 | len = 0x02000000; |
| 121 | p1 = mmap(NULL, len, PROT_READ, |
| 122 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
| 123 | |
| 124 | /* Make sure we get pages aligned with the pagesize. The |
| 125 | target expects this. */ |
| 126 | fail_unless (p1 != MAP_FAILED); |
| 127 | p = (uintptr_t) p1; |
| 128 | fail_unless ((p & pagemask) == 0); |
| 129 | |
| 130 | /* Make sure we can read from the entire area. */ |
| 131 | memcpy (dummybuf, p1, pagesize); |
| 132 | munmap (p1, len); |
| 133 | fprintf (stderr, " passed\n"); |
| 134 | } |
| 135 | |
| 136 | void check_aligned_anonymous_unfixed_colliding_mmaps(void) |
| 137 | { |
| 138 | char *p1; |
| 139 | char *p2; |
| 140 | char *p3; |
| 141 | uintptr_t p; |
| 142 | int i; |
| 143 | |
| 144 | fprintf (stderr, "%s", __func__); |
| 145 | for (i = 0; i < 0x2fff; i++) |
| 146 | { |
| 147 | int nlen; |
| 148 | p1 = mmap(NULL, pagesize, PROT_READ, |
| 149 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
| 150 | fail_unless (p1 != MAP_FAILED); |
| 151 | p = (uintptr_t) p1; |
| 152 | fail_unless ((p & pagemask) == 0); |
| 153 | memcpy (dummybuf, p1, pagesize); |
| 154 | |
| 155 | p2 = mmap(NULL, pagesize, PROT_READ, |
| 156 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
| 157 | fail_unless (p2 != MAP_FAILED); |
| 158 | p = (uintptr_t) p2; |
| 159 | fail_unless ((p & pagemask) == 0); |
| 160 | memcpy (dummybuf, p2, pagesize); |
| 161 | |
| 162 | |
| 163 | munmap (p1, pagesize); |
| 164 | nlen = pagesize * 8; |
| 165 | p3 = mmap(NULL, nlen, PROT_READ, |
| 166 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
Peter Maydell | 420b6c3 | 2011-04-14 14:11:56 +0100 | [diff] [blame] | 167 | fail_unless (p3 != MAP_FAILED); |
edgar_igl | e1ffb0f | 2008-03-01 22:23:17 +0000 | [diff] [blame] | 168 | |
| 169 | /* Check if the mmaped areas collide. */ |
| 170 | if (p3 < p2 |
| 171 | && (p3 + nlen) > p2) |
| 172 | fail_unless (0); |
| 173 | |
| 174 | memcpy (dummybuf, p3, pagesize); |
| 175 | |
| 176 | /* Make sure we get pages aligned with the pagesize. The |
| 177 | target expects this. */ |
edgar_igl | e1ffb0f | 2008-03-01 22:23:17 +0000 | [diff] [blame] | 178 | p = (uintptr_t) p3; |
| 179 | fail_unless ((p & pagemask) == 0); |
| 180 | munmap (p2, pagesize); |
| 181 | munmap (p3, nlen); |
| 182 | } |
| 183 | fprintf (stderr, " passed\n"); |
| 184 | } |
| 185 | |
| 186 | void check_aligned_anonymous_fixed_mmaps(void) |
| 187 | { |
| 188 | char *addr; |
| 189 | void *p1; |
| 190 | uintptr_t p; |
| 191 | int i; |
| 192 | |
| 193 | /* Find a suitable address to start with. */ |
| 194 | addr = mmap(NULL, pagesize * 40, PROT_READ | PROT_WRITE, |
| 195 | MAP_PRIVATE | MAP_ANONYMOUS, |
| 196 | -1, 0); |
| 197 | fprintf (stderr, "%s addr=%p", __func__, addr); |
| 198 | fail_unless (addr != MAP_FAILED); |
| 199 | |
| 200 | for (i = 0; i < 40; i++) |
| 201 | { |
| 202 | /* Create submaps within our unfixed map. */ |
| 203 | p1 = mmap(addr, pagesize, PROT_READ, |
| 204 | MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, |
| 205 | -1, 0); |
| 206 | /* Make sure we get pages aligned with the pagesize. |
| 207 | The target expects this. */ |
| 208 | p = (uintptr_t) p1; |
| 209 | fail_unless (p1 == addr); |
| 210 | fail_unless ((p & pagemask) == 0); |
| 211 | memcpy (dummybuf, p1, pagesize); |
| 212 | munmap (p1, pagesize); |
| 213 | addr += pagesize; |
| 214 | } |
| 215 | fprintf (stderr, " passed\n"); |
| 216 | } |
| 217 | |
| 218 | void check_aligned_anonymous_fixed_mmaps_collide_with_host(void) |
| 219 | { |
| 220 | char *addr; |
| 221 | void *p1; |
| 222 | uintptr_t p; |
| 223 | int i; |
| 224 | |
| 225 | /* Find a suitable address to start with. Right were the x86 hosts |
| 226 | stack is. */ |
| 227 | addr = ((void *)0x80000000); |
| 228 | fprintf (stderr, "%s addr=%p", __func__, addr); |
| 229 | fprintf (stderr, "FIXME: QEMU fails to track pages used by the host."); |
| 230 | |
| 231 | for (i = 0; i < 20; i++) |
| 232 | { |
| 233 | /* Create submaps within our unfixed map. */ |
| 234 | p1 = mmap(addr, pagesize, PROT_READ | PROT_WRITE, |
| 235 | MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, |
| 236 | -1, 0); |
| 237 | /* Make sure we get pages aligned with the pagesize. |
| 238 | The target expects this. */ |
| 239 | p = (uintptr_t) p1; |
| 240 | fail_unless (p1 == addr); |
| 241 | fail_unless ((p & pagemask) == 0); |
| 242 | memcpy (p1, dummybuf, pagesize); |
| 243 | munmap (p1, pagesize); |
| 244 | addr += pagesize; |
| 245 | } |
| 246 | fprintf (stderr, " passed\n"); |
| 247 | } |
| 248 | |
| 249 | void check_file_unfixed_mmaps(void) |
| 250 | { |
| 251 | unsigned int *p1, *p2, *p3; |
| 252 | uintptr_t p; |
| 253 | int i; |
| 254 | |
| 255 | fprintf (stderr, "%s", __func__); |
| 256 | for (i = 0; i < 0x10; i++) |
| 257 | { |
| 258 | size_t len; |
| 259 | |
| 260 | len = pagesize; |
| 261 | p1 = mmap(NULL, len, PROT_READ, |
| 262 | MAP_PRIVATE, |
| 263 | test_fd, 0); |
| 264 | p2 = mmap(NULL, len, PROT_READ, |
| 265 | MAP_PRIVATE, |
| 266 | test_fd, pagesize); |
| 267 | p3 = mmap(NULL, len, PROT_READ, |
| 268 | MAP_PRIVATE, |
| 269 | test_fd, pagesize * 2); |
| 270 | |
| 271 | fail_unless (p1 != MAP_FAILED); |
| 272 | fail_unless (p2 != MAP_FAILED); |
| 273 | fail_unless (p3 != MAP_FAILED); |
| 274 | |
| 275 | /* Make sure we get pages aligned with the pagesize. The |
| 276 | target expects this. */ |
| 277 | p = (uintptr_t) p1; |
| 278 | fail_unless ((p & pagemask) == 0); |
| 279 | p = (uintptr_t) p2; |
| 280 | fail_unless ((p & pagemask) == 0); |
| 281 | p = (uintptr_t) p3; |
| 282 | fail_unless ((p & pagemask) == 0); |
| 283 | |
| 284 | /* Verify that the file maps was made correctly. */ |
| 285 | D(printf ("p1=%d p2=%d p3=%d\n", *p1, *p2, *p3)); |
| 286 | fail_unless (*p1 == 0); |
| 287 | fail_unless (*p2 == (pagesize / sizeof *p2)); |
| 288 | fail_unless (*p3 == ((pagesize * 2) / sizeof *p3)); |
| 289 | |
| 290 | memcpy (dummybuf, p1, pagesize); |
| 291 | memcpy (dummybuf, p2, pagesize); |
| 292 | memcpy (dummybuf, p3, pagesize); |
| 293 | munmap (p1, len); |
| 294 | munmap (p2, len); |
| 295 | munmap (p3, len); |
| 296 | } |
| 297 | fprintf (stderr, " passed\n"); |
| 298 | } |
| 299 | |
| 300 | void check_file_unfixed_eof_mmaps(void) |
| 301 | { |
| 302 | char *cp; |
| 303 | unsigned int *p1; |
| 304 | uintptr_t p; |
| 305 | int i; |
| 306 | |
| 307 | fprintf (stderr, "%s", __func__); |
| 308 | for (i = 0; i < 0x10; i++) |
| 309 | { |
| 310 | p1 = mmap(NULL, pagesize, PROT_READ, |
| 311 | MAP_PRIVATE, |
| 312 | test_fd, |
| 313 | (test_fsize - sizeof *p1) & ~pagemask); |
| 314 | |
| 315 | fail_unless (p1 != MAP_FAILED); |
| 316 | |
| 317 | /* Make sure we get pages aligned with the pagesize. The |
| 318 | target expects this. */ |
| 319 | p = (uintptr_t) p1; |
| 320 | fail_unless ((p & pagemask) == 0); |
| 321 | /* Verify that the file maps was made correctly. */ |
| 322 | fail_unless (p1[(test_fsize & pagemask) / sizeof *p1 - 1] |
| 323 | == ((test_fsize - sizeof *p1) / sizeof *p1)); |
| 324 | |
Stefan Weil | 64c7b9d | 2011-04-28 17:20:27 +0200 | [diff] [blame] | 325 | /* Verify that the end of page is accessible and zeroed. */ |
edgar_igl | e1ffb0f | 2008-03-01 22:23:17 +0000 | [diff] [blame] | 326 | cp = (void *) p1; |
| 327 | fail_unless (cp[pagesize - 4] == 0); |
| 328 | munmap (p1, pagesize); |
| 329 | } |
| 330 | fprintf (stderr, " passed\n"); |
| 331 | } |
| 332 | |
| 333 | void check_file_fixed_eof_mmaps(void) |
| 334 | { |
| 335 | char *addr; |
| 336 | char *cp; |
| 337 | unsigned int *p1; |
| 338 | uintptr_t p; |
| 339 | int i; |
| 340 | |
| 341 | /* Find a suitable address to start with. */ |
| 342 | addr = mmap(NULL, pagesize * 44, PROT_READ, |
| 343 | MAP_PRIVATE | MAP_ANONYMOUS, |
| 344 | -1, 0); |
| 345 | |
| 346 | fprintf (stderr, "%s addr=%p", __func__, (void *)addr); |
| 347 | fail_unless (addr != MAP_FAILED); |
| 348 | |
| 349 | for (i = 0; i < 0x10; i++) |
| 350 | { |
| 351 | /* Create submaps within our unfixed map. */ |
| 352 | p1 = mmap(addr, pagesize, PROT_READ, |
| 353 | MAP_PRIVATE | MAP_FIXED, |
| 354 | test_fd, |
| 355 | (test_fsize - sizeof *p1) & ~pagemask); |
| 356 | |
| 357 | fail_unless (p1 != MAP_FAILED); |
| 358 | |
| 359 | /* Make sure we get pages aligned with the pagesize. The |
| 360 | target expects this. */ |
| 361 | p = (uintptr_t) p1; |
| 362 | fail_unless ((p & pagemask) == 0); |
| 363 | |
| 364 | /* Verify that the file maps was made correctly. */ |
| 365 | fail_unless (p1[(test_fsize & pagemask) / sizeof *p1 - 1] |
| 366 | == ((test_fsize - sizeof *p1) / sizeof *p1)); |
| 367 | |
Stefan Weil | 64c7b9d | 2011-04-28 17:20:27 +0200 | [diff] [blame] | 368 | /* Verify that the end of page is accessible and zeroed. */ |
edgar_igl | e1ffb0f | 2008-03-01 22:23:17 +0000 | [diff] [blame] | 369 | cp = (void *)p1; |
| 370 | fail_unless (cp[pagesize - 4] == 0); |
| 371 | munmap (p1, pagesize); |
| 372 | addr += pagesize; |
| 373 | } |
| 374 | fprintf (stderr, " passed\n"); |
| 375 | } |
| 376 | |
| 377 | void check_file_fixed_mmaps(void) |
| 378 | { |
edgar_igl | 7dd7c98 | 2008-05-03 15:55:42 +0000 | [diff] [blame] | 379 | unsigned char *addr; |
edgar_igl | e1ffb0f | 2008-03-01 22:23:17 +0000 | [diff] [blame] | 380 | unsigned int *p1, *p2, *p3, *p4; |
| 381 | int i; |
| 382 | |
| 383 | /* Find a suitable address to start with. */ |
edgar_igl | 7dd7c98 | 2008-05-03 15:55:42 +0000 | [diff] [blame] | 384 | addr = mmap(NULL, pagesize * 40 * 4, PROT_READ, |
edgar_igl | e1ffb0f | 2008-03-01 22:23:17 +0000 | [diff] [blame] | 385 | MAP_PRIVATE | MAP_ANONYMOUS, |
| 386 | -1, 0); |
| 387 | fprintf (stderr, "%s addr=%p", __func__, (void *)addr); |
| 388 | fail_unless (addr != MAP_FAILED); |
| 389 | |
| 390 | for (i = 0; i < 40; i++) |
| 391 | { |
| 392 | p1 = mmap(addr, pagesize, PROT_READ, |
| 393 | MAP_PRIVATE | MAP_FIXED, |
| 394 | test_fd, 0); |
| 395 | p2 = mmap(addr + pagesize, pagesize, PROT_READ, |
| 396 | MAP_PRIVATE | MAP_FIXED, |
| 397 | test_fd, pagesize); |
| 398 | p3 = mmap(addr + pagesize * 2, pagesize, PROT_READ, |
| 399 | MAP_PRIVATE | MAP_FIXED, |
| 400 | test_fd, pagesize * 2); |
| 401 | p4 = mmap(addr + pagesize * 3, pagesize, PROT_READ, |
| 402 | MAP_PRIVATE | MAP_FIXED, |
| 403 | test_fd, pagesize * 3); |
| 404 | |
| 405 | /* Make sure we get pages aligned with the pagesize. |
| 406 | The target expects this. */ |
edgar_igl | 7dd7c98 | 2008-05-03 15:55:42 +0000 | [diff] [blame] | 407 | fail_unless (p1 == (void *)addr); |
| 408 | fail_unless (p2 == (void *)addr + pagesize); |
| 409 | fail_unless (p3 == (void *)addr + pagesize * 2); |
| 410 | fail_unless (p4 == (void *)addr + pagesize * 3); |
edgar_igl | e1ffb0f | 2008-03-01 22:23:17 +0000 | [diff] [blame] | 411 | |
| 412 | /* Verify that the file maps was made correctly. */ |
| 413 | fail_unless (*p1 == 0); |
| 414 | fail_unless (*p2 == (pagesize / sizeof *p2)); |
| 415 | fail_unless (*p3 == ((pagesize * 2) / sizeof *p3)); |
| 416 | fail_unless (*p4 == ((pagesize * 3) / sizeof *p4)); |
| 417 | |
| 418 | memcpy (dummybuf, p1, pagesize); |
| 419 | memcpy (dummybuf, p2, pagesize); |
| 420 | memcpy (dummybuf, p3, pagesize); |
| 421 | memcpy (dummybuf, p4, pagesize); |
| 422 | |
| 423 | munmap (p1, pagesize); |
| 424 | munmap (p2, pagesize); |
| 425 | munmap (p3, pagesize); |
| 426 | munmap (p4, pagesize); |
edgar_igl | 7dd7c98 | 2008-05-03 15:55:42 +0000 | [diff] [blame] | 427 | addr += pagesize * 4; |
edgar_igl | e1ffb0f | 2008-03-01 22:23:17 +0000 | [diff] [blame] | 428 | } |
| 429 | fprintf (stderr, " passed\n"); |
| 430 | } |
| 431 | |
| 432 | int main(int argc, char **argv) |
| 433 | { |
| 434 | char tempname[] = "/tmp/.cmmapXXXXXX"; |
| 435 | unsigned int i; |
| 436 | |
| 437 | /* Trust the first argument, otherwise probe the system for our |
| 438 | pagesize. */ |
| 439 | if (argc > 1) |
| 440 | pagesize = strtoul(argv[1], NULL, 0); |
| 441 | else |
| 442 | pagesize = sysconf(_SC_PAGESIZE); |
| 443 | |
| 444 | /* Assume pagesize is a power of two. */ |
| 445 | pagemask = pagesize - 1; |
| 446 | dummybuf = malloc (pagesize); |
| 447 | printf ("pagesize=%u pagemask=%x\n", pagesize, pagemask); |
| 448 | |
| 449 | test_fd = mkstemp(tempname); |
| 450 | unlink(tempname); |
| 451 | |
| 452 | /* Fill the file with int's counting from zero and up. */ |
| 453 | for (i = 0; i < (pagesize * 4) / sizeof i; i++) |
| 454 | write (test_fd, &i, sizeof i); |
| 455 | /* Append a few extra writes to make the file end at non |
| 456 | page boundary. */ |
| 457 | write (test_fd, &i, sizeof i); i++; |
| 458 | write (test_fd, &i, sizeof i); i++; |
| 459 | write (test_fd, &i, sizeof i); i++; |
| 460 | |
| 461 | test_fsize = lseek(test_fd, 0, SEEK_CUR); |
| 462 | |
| 463 | /* Run the tests. */ |
| 464 | check_aligned_anonymous_unfixed_mmaps(); |
| 465 | check_aligned_anonymous_unfixed_colliding_mmaps(); |
| 466 | check_aligned_anonymous_fixed_mmaps(); |
| 467 | check_file_unfixed_mmaps(); |
| 468 | check_file_fixed_mmaps(); |
| 469 | check_file_fixed_eof_mmaps(); |
| 470 | check_file_unfixed_eof_mmaps(); |
| 471 | |
| 472 | /* Fails at the moment. */ |
| 473 | /* check_aligned_anonymous_fixed_mmaps_collide_with_host(); */ |
| 474 | |
| 475 | return EXIT_SUCCESS; |
| 476 | } |