1 /* 2 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv (at) altlinux.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include "tests.h" 29 #include <stdio.h> 30 #include <stdint.h> 31 #include <unistd.h> 32 #include <limits.h> 33 #include <sys/mman.h> 34 35 int 36 main(int ac, char **av) 37 { 38 const char *const name = ac > 1 ? av[1] : "mmap"; 39 const intmax_t pagesize = get_page_size(); 40 const unsigned long length1 = pagesize * 6; 41 const unsigned long length2 = pagesize * 3; 42 const unsigned long length3 = pagesize * 2; 43 const int fd = -1; 44 off_t offset; 45 void *addr, *p; 46 47 #if ULONG_MAX > 4294967295UL 48 offset = 0xcafedeadbeef000ULL & -pagesize; 49 addr = (void *) (uintmax_t) (0xfacefeed000 & -pagesize); 50 #else 51 offset = 0xdeadbeef000ULL & -pagesize; 52 addr = (void *) (unsigned int) (0xfaced000 & -pagesize); 53 #endif 54 const uintmax_t uoffset = 55 sizeof(offset) == sizeof(int) ? (uintmax_t) (unsigned int) offset 56 : (uintmax_t) offset; 57 58 (void) close(0); 59 (void) close(0); 60 printf("%s(NULL, 0, PROT_NONE, MAP_FILE, 0, 0) = -1 EBADF (%m)\n", 61 name); 62 mmap(NULL, 0, PROT_NONE, MAP_FILE, 0, 0); 63 64 p = mmap(addr, length1, PROT_READ | PROT_WRITE, 65 MAP_PRIVATE | MAP_ANONYMOUS, fd, offset); 66 if (MAP_FAILED == p) 67 perror_msg_and_fail("mmap"); 68 printf("%s(%p, %lu, PROT_READ|PROT_WRITE, " 69 "MAP_PRIVATE|MAP_ANONYMOUS, %d, %#jx) = %p\n", 70 name, addr, length1, fd, uoffset, p); 71 72 if (msync(p, length1, MS_SYNC)) 73 perror_msg_and_fail("msync"); 74 printf("msync(%p, %lu, MS_SYNC) = 0\n", p, length1); 75 76 if (mprotect(p, length1, PROT_NONE)) 77 perror_msg_and_fail("mprotect"); 78 printf("mprotect(%p, %lu, PROT_NONE) = 0\n", p, length1); 79 80 addr = mremap(p, length1, length2, 0); 81 if (MAP_FAILED == addr) 82 perror_msg_and_fail("mremap"); 83 printf("mremap(%p, %lu, %lu, 0) = %p\n", p, length1, length2, addr); 84 85 p = mremap(addr, length2, length3, MREMAP_MAYMOVE | MREMAP_FIXED, 86 addr + length2); 87 if (MAP_FAILED == p) 88 perror_msg_and_fail("mremap"); 89 printf("mremap(%p, %lu, %lu, MREMAP_MAYMOVE|MREMAP_FIXED" 90 ", %p) = %p\n", addr, length2, length3, addr + length2, p); 91 92 if (madvise(p, length3, MADV_NORMAL)) 93 perror_msg_and_fail("madvise"); 94 printf("madvise(%p, %lu, MADV_NORMAL) = 0\n", p, length3); 95 96 if (munmap(p, length3)) 97 perror_msg_and_fail("munmap"); 98 printf("munmap(%p, %lu) = 0\n", p, length3); 99 100 if (mlockall(MCL_FUTURE)) 101 perror_msg_and_fail("mlockall"); 102 puts("mlockall(MCL_FUTURE) = 0"); 103 104 puts("+++ exited with 0 +++"); 105 return 0; 106 } 107
