1 /* $NetBSD: t_mmap.c,v 1.18 2022/06/04 23:09:18 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 2011 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jukka Ruohonen. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /*- 33 * Copyright (c)2004 YAMAMOTO Takashi, 34 * All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 46 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 48 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 55 * SUCH DAMAGE. 56 */ 57 #include <sys/cdefs.h> 58 __RCSID("$NetBSD: t_mmap.c,v 1.18 2022/06/04 23:09:18 riastradh Exp $"); 59 60 #include <sys/param.h> 61 #include <sys/disklabel.h> 62 #include <sys/mman.h> 63 #include <sys/stat.h> 64 #include <sys/socket.h> 65 #include <sys/sysctl.h> 66 #include <sys/wait.h> 67 68 #include <atf-c.h> 69 #include <errno.h> 70 #include <fcntl.h> 71 #include <signal.h> 72 #include <stdio.h> 73 #include <stdlib.h> 74 #include <string.h> 75 #include <unistd.h> 76 #include <paths.h> 77 #include <pthread.h> 78 79 static long page = 0; 80 static char path[] = "mmap"; 81 static void map_check(void *, int); 82 static void map_sighandler(int); 83 static void testloan(void *, void *, char, int); 84 85 #define BUFSIZE (32 * 1024) /* enough size to trigger sosend_loan */ 86 87 static void 88 map_check(void *map, int flag) 89 { 90 91 if (flag != 0) { 92 ATF_REQUIRE(map == MAP_FAILED); 93 return; 94 } 95 96 ATF_REQUIRE(map != MAP_FAILED); 97 ATF_REQUIRE(munmap(map, page) == 0); 98 } 99 100 void 101 testloan(void *vp, void *vp2, char pat, int docheck) 102 { 103 char buf[BUFSIZE]; 104 char backup[BUFSIZE]; 105 ssize_t nwritten; 106 ssize_t nread; 107 int fds[2]; 108 int val; 109 110 val = BUFSIZE; 111 112 if (docheck != 0) 113 (void)memcpy(backup, vp, BUFSIZE); 114 115 if (socketpair(AF_LOCAL, SOCK_STREAM, PF_UNSPEC, fds) != 0) 116 atf_tc_fail("socketpair() failed"); 117 118 val = BUFSIZE; 119 120 if (setsockopt(fds[1], SOL_SOCKET, SO_RCVBUF, &val, sizeof(val)) != 0) 121 atf_tc_fail("setsockopt() failed, SO_RCVBUF"); 122 123 val = BUFSIZE; 124 125 if (setsockopt(fds[0], SOL_SOCKET, SO_SNDBUF, &val, sizeof(val)) != 0) 126 atf_tc_fail("setsockopt() failed, SO_SNDBUF"); 127 128 if (fcntl(fds[0], F_SETFL, O_NONBLOCK) != 0) 129 atf_tc_fail("fcntl() failed"); 130 131 nwritten = write(fds[0], (char *)vp + page, BUFSIZE - page); 132 133 if (nwritten == -1) 134 atf_tc_fail("write() failed"); 135 136 /* Break loan. */ 137 (void)memset(vp2, pat, BUFSIZE); 138 139 nread = read(fds[1], buf + page, BUFSIZE - page); 140 141 if (nread == -1) 142 atf_tc_fail("read() failed"); 143 144 if (nread != nwritten) 145 atf_tc_fail("too short read"); 146 147 if (docheck != 0 && memcmp(backup, buf + page, nread) != 0) 148 atf_tc_fail("data mismatch"); 149 150 ATF_REQUIRE(close(fds[0]) == 0); 151 ATF_REQUIRE(close(fds[1]) == 0); 152 } 153 154 static void 155 map_sighandler(int signo) 156 { 157 _exit(signo); 158 } 159 160 ATF_TC(mmap_block); 161 ATF_TC_HEAD(mmap_block, tc) 162 { 163 atf_tc_set_md_var(tc, "descr", "Test mmap(2) with a block device"); 164 atf_tc_set_md_var(tc, "require.user", "root"); 165 } 166 167 ATF_TC_BODY(mmap_block, tc) 168 { 169 static const int mib[] = { CTL_HW, HW_DISKNAMES }; 170 static const unsigned int miblen = __arraycount(mib); 171 char *map, *dk, *drives, dev[PATH_MAX]; 172 size_t len; 173 int fd = -1; 174 175 atf_tc_skip("The test case causes a panic " \ 176 "(PR kern/38889, PR kern/46592)"); 177 178 ATF_REQUIRE(sysctl(mib, miblen, NULL, &len, NULL, 0) == 0); 179 drives = malloc(len); 180 ATF_REQUIRE(drives != NULL); 181 ATF_REQUIRE(sysctl(mib, miblen, drives, &len, NULL, 0) == 0); 182 for (dk = strtok(drives, " "); dk != NULL; dk = strtok(NULL, " ")) { 183 if (strncmp(dk, "dk", 2) == 0) 184 snprintf(dev, sizeof(dev), _PATH_DEV "%s", dk); 185 else 186 snprintf(dev, sizeof(dev), _PATH_DEV "%s%c", dk, 187 'a' + RAW_PART); 188 fprintf(stderr, "trying: %s\n", dev); 189 190 if ((fd = open(dev, O_RDONLY)) >= 0) { 191 (void)fprintf(stderr, "using %s\n", dev); 192 break; 193 } else 194 (void)fprintf(stderr, "%s: %s\n", dev, strerror(errno)); 195 } 196 free(drives); 197 198 if (fd < 0) 199 atf_tc_skip("failed to find suitable block device"); 200 201 map = mmap(NULL, 4096, PROT_READ, MAP_FILE, fd, 0); 202 ATF_REQUIRE_MSG(map != MAP_FAILED, "mmap: %s", strerror(errno)); 203 204 (void)fprintf(stderr, "first byte %x\n", *map); 205 ATF_REQUIRE(close(fd) == 0); 206 (void)fprintf(stderr, "first byte %x\n", *map); 207 208 ATF_REQUIRE(munmap(map, 4096) == 0); 209 } 210 211 ATF_TC(mmap_err); 212 ATF_TC_HEAD(mmap_err, tc) 213 { 214 atf_tc_set_md_var(tc, "descr", "Test error conditions of mmap(2)"); 215 } 216 217 ATF_TC_BODY(mmap_err, tc) 218 { 219 void *addr = (void *)-1; 220 void *map; 221 222 errno = 0; 223 map = mmap(NULL, 3, PROT_READ, MAP_FILE|MAP_PRIVATE, -1, 0); 224 225 ATF_REQUIRE(map == MAP_FAILED); 226 ATF_REQUIRE(errno == EBADF); 227 228 errno = 0; 229 map = mmap(addr, page, PROT_READ, MAP_FIXED|MAP_PRIVATE, -1, 0); 230 231 ATF_REQUIRE(map == MAP_FAILED); 232 ATF_REQUIRE_MSG(errno == EINVAL, "errno %d != EINVAL", errno); 233 234 errno = 0; 235 map = mmap(NULL, page, PROT_READ, MAP_ANON|MAP_PRIVATE, INT_MAX, 0); 236 237 ATF_REQUIRE(map == MAP_FAILED); 238 ATF_REQUIRE(errno == EINVAL); 239 } 240 241 ATF_TC_WITH_CLEANUP(mmap_loan); 242 ATF_TC_HEAD(mmap_loan, tc) 243 { 244 atf_tc_set_md_var(tc, "descr", "Test uvm page loanout with mmap(2)"); 245 } 246 247 ATF_TC_BODY(mmap_loan, tc) 248 { 249 char buf[BUFSIZE]; 250 char *vp, *vp2; 251 int fd; 252 253 fd = open(path, O_RDWR | O_CREAT, 0600); 254 ATF_REQUIRE(fd >= 0); 255 256 (void)memset(buf, 'x', sizeof(buf)); 257 (void)write(fd, buf, sizeof(buf)); 258 259 vp = mmap(NULL, BUFSIZE, PROT_READ | PROT_WRITE, 260 MAP_FILE | MAP_PRIVATE, fd, 0); 261 262 ATF_REQUIRE(vp != MAP_FAILED); 263 264 vp2 = vp; 265 266 testloan(vp, vp2, 'A', 0); 267 testloan(vp, vp2, 'B', 1); 268 269 ATF_REQUIRE(munmap(vp, BUFSIZE) == 0); 270 271 vp = mmap(NULL, BUFSIZE, PROT_READ | PROT_WRITE, 272 MAP_FILE | MAP_SHARED, fd, 0); 273 274 vp2 = mmap(NULL, BUFSIZE, PROT_READ | PROT_WRITE, 275 MAP_FILE | MAP_SHARED, fd, 0); 276 277 ATF_REQUIRE(vp != MAP_FAILED); 278 ATF_REQUIRE(vp2 != MAP_FAILED); 279 280 testloan(vp, vp2, 'E', 1); 281 282 ATF_REQUIRE(munmap(vp, BUFSIZE) == 0); 283 ATF_REQUIRE(munmap(vp2, BUFSIZE) == 0); 284 } 285 286 ATF_TC_CLEANUP(mmap_loan, tc) 287 { 288 (void)unlink(path); 289 } 290 291 ATF_TC_WITH_CLEANUP(mmap_prot_1); 292 ATF_TC_HEAD(mmap_prot_1, tc) 293 { 294 atf_tc_set_md_var(tc, "descr", "Test mmap(2) protections, #1"); 295 } 296 297 ATF_TC_BODY(mmap_prot_1, tc) 298 { 299 void *map; 300 int fd; 301 302 /* 303 * Open a file write-only and try to 304 * map it read-only. This should fail. 305 */ 306 fd = open(path, O_WRONLY | O_CREAT, 0700); 307 308 if (fd < 0) 309 return; 310 311 ATF_REQUIRE(write(fd, "XXX", 3) == 3); 312 313 map = mmap(NULL, 3, PROT_READ, MAP_FILE|MAP_PRIVATE, fd, 0); 314 map_check(map, 1); 315 316 map = mmap(NULL, 3, PROT_WRITE, MAP_FILE|MAP_PRIVATE, fd, 0); 317 map_check(map, 0); 318 319 ATF_REQUIRE(close(fd) == 0); 320 } 321 322 ATF_TC_CLEANUP(mmap_prot_1, tc) 323 { 324 (void)unlink(path); 325 } 326 327 ATF_TC(mmap_prot_2); 328 ATF_TC_HEAD(mmap_prot_2, tc) 329 { 330 atf_tc_set_md_var(tc, "descr", "Test mmap(2) protections, #2"); 331 } 332 333 ATF_TC_BODY(mmap_prot_2, tc) 334 { 335 char buf[2]; 336 void *map; 337 pid_t pid; 338 int sta; 339 340 /* 341 * Make a PROT_NONE mapping and try to access it. 342 * If we catch a SIGSEGV, all works as expected. 343 */ 344 map = mmap(NULL, page, PROT_NONE, MAP_ANON|MAP_PRIVATE, -1, 0); 345 ATF_REQUIRE(map != MAP_FAILED); 346 347 pid = fork(); 348 ATF_REQUIRE(pid >= 0); 349 350 if (pid == 0) { 351 ATF_REQUIRE(signal(SIGSEGV, map_sighandler) != SIG_ERR); 352 ATF_REQUIRE(strlcpy(buf, map, sizeof(buf)) != 0); 353 } 354 355 (void)wait(&sta); 356 357 ATF_REQUIRE(WIFEXITED(sta) != 0); 358 ATF_REQUIRE(WEXITSTATUS(sta) == SIGSEGV); 359 ATF_REQUIRE(munmap(map, page) == 0); 360 } 361 362 ATF_TC_WITH_CLEANUP(mmap_prot_3); 363 ATF_TC_HEAD(mmap_prot_3, tc) 364 { 365 atf_tc_set_md_var(tc, "descr", "Test mmap(2) protections, #3"); 366 } 367 368 ATF_TC_BODY(mmap_prot_3, tc) 369 { 370 char buf[2]; 371 int fd, sta; 372 void *map; 373 pid_t pid; 374 375 /* 376 * Open a file, change the permissions 377 * to read-only, and try to map it as 378 * PROT_NONE. This should succeed, but 379 * the access should generate SIGSEGV. 380 */ 381 fd = open(path, O_RDWR | O_CREAT, 0700); 382 383 if (fd < 0) 384 return; 385 386 ATF_REQUIRE(write(fd, "XXX", 3) == 3); 387 ATF_REQUIRE(close(fd) == 0); 388 ATF_REQUIRE(chmod(path, 0444) == 0); 389 390 fd = open(path, O_RDONLY); 391 ATF_REQUIRE(fd != -1); 392 393 map = mmap(NULL, 3, PROT_NONE, MAP_FILE | MAP_SHARED, fd, 0); 394 ATF_REQUIRE(map != MAP_FAILED); 395 396 pid = fork(); 397 398 ATF_REQUIRE(pid >= 0); 399 400 if (pid == 0) { 401 ATF_REQUIRE(signal(SIGSEGV, map_sighandler) != SIG_ERR); 402 ATF_REQUIRE(strlcpy(buf, map, sizeof(buf)) != 0); 403 } 404 405 (void)wait(&sta); 406 407 ATF_REQUIRE(WIFEXITED(sta) != 0); 408 ATF_REQUIRE(WEXITSTATUS(sta) == SIGSEGV); 409 ATF_REQUIRE(munmap(map, 3) == 0); 410 } 411 412 ATF_TC_CLEANUP(mmap_prot_3, tc) 413 { 414 (void)unlink(path); 415 } 416 417 ATF_TC(mmap_reprotect_race); 418 419 ATF_TC_HEAD(mmap_reprotect_race, tc) 420 { 421 atf_tc_set_md_var(tc, "descr", "Test for the race condition of PR 52239"); 422 } 423 424 const int mmap_reprotect_race_npages = 13; 425 const int mmap_reprotect_iterations = 1000000; 426 427 static void * 428 mmap_reprotect_race_thread(void *arg) 429 { 430 int i, r; 431 void *p; 432 433 for (i = 0; i < mmap_reprotect_iterations; i++) { 434 /* Get some unrelated memory */ 435 p = mmap(0, mmap_reprotect_race_npages * page, 436 PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0); 437 ATF_REQUIRE(p); 438 r = munmap(p, mmap_reprotect_race_npages * page); 439 ATF_REQUIRE(r == 0); 440 } 441 return 0; 442 } 443 444 ATF_TC_BODY(mmap_reprotect_race, tc) 445 { 446 pthread_t thread; 447 void *p, *q; 448 int i, r; 449 450 r = pthread_create(&thread, 0, mmap_reprotect_race_thread, 0); 451 ATF_REQUIRE(r == 0); 452 453 for (i = 0; i < mmap_reprotect_iterations; i++) { 454 /* Get a placeholder region */ 455 p = mmap(0, mmap_reprotect_race_npages * page, 456 PROT_NONE, MAP_ANON|MAP_PRIVATE, -1, 0); 457 if (p == MAP_FAILED) 458 atf_tc_fail("mmap: %s", strerror(errno)); 459 460 /* Upgrade placeholder to read/write access */ 461 q = mmap(p, mmap_reprotect_race_npages * page, 462 PROT_READ|PROT_WRITE, 463 MAP_ANON|MAP_PRIVATE|MAP_FIXED, -1, 0); 464 if (q == MAP_FAILED) 465 atf_tc_fail("update mmap: %s", strerror(errno)); 466 ATF_REQUIRE(q == p); 467 468 /* Free it */ 469 r = munmap(q, mmap_reprotect_race_npages * page); 470 if (r != 0) 471 atf_tc_fail("munmap: %s", strerror(errno)); 472 } 473 pthread_join(thread, NULL); 474 } 475 476 ATF_TC_WITH_CLEANUP(mmap_truncate); 477 ATF_TC_HEAD(mmap_truncate, tc) 478 { 479 atf_tc_set_md_var(tc, "descr", "Test mmap(2) and ftruncate(2)"); 480 } 481 482 ATF_TC_BODY(mmap_truncate, tc) 483 { 484 char *map; 485 long i; 486 int fd; 487 488 fd = open(path, O_RDWR | O_CREAT, 0700); 489 490 if (fd < 0) 491 return; 492 493 /* 494 * See that ftruncate(2) works 495 * while the file is mapped. 496 */ 497 ATF_REQUIRE(ftruncate(fd, page) == 0); 498 499 map = mmap(NULL, page, PROT_READ | PROT_WRITE, MAP_FILE|MAP_PRIVATE, 500 fd, 0); 501 ATF_REQUIRE(map != MAP_FAILED); 502 503 for (i = 0; i < page; i++) 504 map[i] = 'x'; 505 506 ATF_REQUIRE(ftruncate(fd, 0) == 0); 507 ATF_REQUIRE(ftruncate(fd, page / 8) == 0); 508 ATF_REQUIRE(ftruncate(fd, page / 4) == 0); 509 ATF_REQUIRE(ftruncate(fd, page / 2) == 0); 510 ATF_REQUIRE(ftruncate(fd, page / 12) == 0); 511 ATF_REQUIRE(ftruncate(fd, page / 64) == 0); 512 513 (void)munmap(map, page); 514 ATF_REQUIRE(close(fd) == 0); 515 } 516 517 ATF_TC_CLEANUP(mmap_truncate, tc) 518 { 519 (void)unlink(path); 520 } 521 522 ATF_TC_WITH_CLEANUP(mmap_truncate_signal); 523 ATF_TC_HEAD(mmap_truncate_signal, tc) 524 { 525 atf_tc_set_md_var(tc, "descr", 526 "Test mmap(2) ftruncate(2) causing signal"); 527 } 528 529 ATF_TC_BODY(mmap_truncate_signal, tc) 530 { 531 char *map; 532 long i; 533 int fd, sta; 534 pid_t pid; 535 536 fd = open(path, O_RDWR | O_CREAT, 0700); 537 538 if (fd < 0) 539 return; 540 541 ATF_REQUIRE(write(fd, "foo\n", 5) == 5); 542 543 map = mmap(NULL, page, PROT_READ, MAP_FILE|MAP_PRIVATE, fd, 0); 544 ATF_REQUIRE(map != MAP_FAILED); 545 546 sta = 0; 547 for (i = 0; i < 5; i++) 548 sta += map[i]; 549 ATF_REQUIRE(sta == 334); 550 551 ATF_REQUIRE(ftruncate(fd, 0) == 0); 552 pid = fork(); 553 ATF_REQUIRE(pid >= 0); 554 555 if (pid == 0) { 556 ATF_REQUIRE(signal(SIGBUS, map_sighandler) != SIG_ERR); 557 ATF_REQUIRE(signal(SIGSEGV, map_sighandler) != SIG_ERR); 558 sta = 0; 559 for (i = 0; i < page; i++) 560 sta += map[i]; 561 /* child never will get this far, but the compiler will 562 not know, so better use the values calculated to 563 prevent the access to be optimized out */ 564 ATF_REQUIRE(i == 0); 565 ATF_REQUIRE(sta == 0); 566 (void)munmap(map, page); 567 (void)close(fd); 568 return; 569 } 570 571 (void)wait(&sta); 572 573 ATF_REQUIRE(WIFEXITED(sta) != 0); 574 if (WEXITSTATUS(sta) == SIGSEGV) 575 atf_tc_fail("child process got SIGSEGV instead of SIGBUS"); 576 ATF_REQUIRE(WEXITSTATUS(sta) == SIGBUS); 577 ATF_REQUIRE(munmap(map, page) == 0); 578 ATF_REQUIRE(close(fd) == 0); 579 } 580 581 ATF_TC_CLEANUP(mmap_truncate_signal, tc) 582 { 583 (void)unlink(path); 584 } 585 586 ATF_TC(mmap_va0); 587 ATF_TC_HEAD(mmap_va0, tc) 588 { 589 atf_tc_set_md_var(tc, "descr", "Test mmap(2) and vm.user_va0_disable"); 590 } 591 592 ATF_TC_BODY(mmap_va0, tc) 593 { 594 int flags = MAP_ANON | MAP_FIXED | MAP_PRIVATE; 595 size_t len = sizeof(int); 596 void *map; 597 int val; 598 599 /* 600 * Make an anonymous fixed mapping at zero address. If the address 601 * is restricted as noted in security(7), the syscall should fail. 602 */ 603 if (sysctlbyname("vm.user_va0_disable", &val, &len, NULL, 0) != 0) 604 atf_tc_fail("failed to read vm.user_va0_disable"); 605 606 map = mmap(NULL, page, PROT_EXEC, flags, -1, 0); 607 map_check(map, val); 608 609 map = mmap(NULL, page, PROT_READ, flags, -1, 0); 610 map_check(map, val); 611 612 map = mmap(NULL, page, PROT_WRITE, flags, -1, 0); 613 map_check(map, val); 614 615 map = mmap(NULL, page, PROT_READ|PROT_WRITE, flags, -1, 0); 616 map_check(map, val); 617 618 map = mmap(NULL, page, PROT_EXEC|PROT_READ|PROT_WRITE, flags, -1, 0); 619 map_check(map, val); 620 } 621 622 static void 623 test_mmap_hint(uintptr_t hintaddr) 624 { 625 void *hint = (void *)hintaddr; 626 void *map1 = MAP_FAILED, *map2 = MAP_FAILED, *map3 = MAP_FAILED; 627 628 map1 = mmap(hint, page, PROT_READ|PROT_WRITE, MAP_ANON, -1, 0); 629 if (map1 == MAP_FAILED) { 630 atf_tc_fail_nonfatal("mmap1 hint=%p: errno=%d", hint, errno); 631 goto out; 632 } 633 map2 = mmap(map1, page, PROT_READ|PROT_WRITE, MAP_ANON, -1, 0); 634 if (map2 == MAP_FAILED) { 635 atf_tc_fail_nonfatal("mmap2 hint=%p map1=%p failed: errno=%d", 636 hint, map1, errno); 637 goto out; 638 } 639 map3 = mmap(hint, page, PROT_READ|PROT_WRITE, MAP_ANON, -1, 0); 640 if (map3 == MAP_FAILED) { 641 atf_tc_fail_nonfatal("mmap3 hint=%p map1=%p failed: errno=%d", 642 hint, map1, errno); 643 goto out; 644 } 645 out: 646 if (map3 != MAP_FAILED) { 647 ATF_CHECK_MSG(munmap(map3, page) == 0, "munmap3 %p hint=%p", 648 map3, hint); 649 } 650 if (map2 != MAP_FAILED) { 651 ATF_CHECK_MSG(munmap(map2, page) == 0, "munmap2 %p hint=%p", 652 map2, hint); 653 } 654 if (map1 != MAP_FAILED) { 655 ATF_CHECK_MSG(munmap(map1, page) == 0, "munmap1 %p hint=%p", 656 map1, hint); 657 } 658 } 659 660 ATF_TC(mmap_hint); 661 ATF_TC_HEAD(mmap_hint, tc) 662 { 663 atf_tc_set_md_var(tc, "descr", "Test mmap with hints"); 664 } 665 ATF_TC_BODY(mmap_hint, tc) 666 { 667 static const int minaddress_mib[] = { CTL_VM, VM_MINADDRESS }; 668 static const int maxaddress_mib[] = { CTL_VM, VM_MAXADDRESS }; 669 long minaddress, maxaddress; 670 size_t minaddresssz = sizeof(minaddress); 671 size_t maxaddresssz = sizeof(maxaddress); 672 673 ATF_REQUIRE_MSG(sysctl(minaddress_mib, __arraycount(minaddress_mib), 674 &minaddress, &minaddresssz, NULL, 0) == 0, 675 "sysctl vm.minaddress: errno=%d", errno); 676 ATF_REQUIRE_MSG(sysctl(maxaddress_mib, __arraycount(maxaddress_mib), 677 &maxaddress, &maxaddresssz, NULL, 0) == 0, 678 "sysctl vm.maxaddress: errno=%d", errno); 679 680 test_mmap_hint(0); 681 test_mmap_hint(-1); 682 test_mmap_hint(page); 683 test_mmap_hint(minaddress); 684 test_mmap_hint(maxaddress); 685 } 686 687 ATF_TP_ADD_TCS(tp) 688 { 689 page = sysconf(_SC_PAGESIZE); 690 ATF_REQUIRE(page >= 0); 691 692 ATF_TP_ADD_TC(tp, mmap_block); 693 ATF_TP_ADD_TC(tp, mmap_err); 694 ATF_TP_ADD_TC(tp, mmap_loan); 695 ATF_TP_ADD_TC(tp, mmap_prot_1); 696 ATF_TP_ADD_TC(tp, mmap_prot_2); 697 ATF_TP_ADD_TC(tp, mmap_prot_3); 698 ATF_TP_ADD_TC(tp, mmap_reprotect_race); 699 ATF_TP_ADD_TC(tp, mmap_truncate); 700 ATF_TP_ADD_TC(tp, mmap_truncate_signal); 701 ATF_TP_ADD_TC(tp, mmap_va0); 702 ATF_TP_ADD_TC(tp, mmap_hint); 703 704 return atf_no_error(); 705 } 706
Indexes created Sat Sep 20 22:09:52 GMT 2025