104 lines
3.7 KiB
C
104 lines
3.7 KiB
C
/*
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* Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 2015-2017 The strace developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include <stdio.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <limits.h>
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#include <sys/mman.h>
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int
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main(int ac, char **av)
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{
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const char *const name = ac > 1 ? av[1] : "mmap";
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const intmax_t pagesize = get_page_size();
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const unsigned long length1 = pagesize * 6;
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const unsigned long length2 = pagesize * 3;
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const unsigned long length3 = pagesize * 2;
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const int fd = -1;
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off_t offset;
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void *addr, *p;
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#if ULONG_MAX > 4294967295UL
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offset = 0xcafedeadbeef000ULL & -pagesize;
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addr = (void *) (uintmax_t) (0xfacefeed000 & -pagesize);
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#else
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offset = 0xdeadbeef000ULL & -pagesize;
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addr = (void *) (unsigned int) (0xfaced000 & -pagesize);
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#endif
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const uintmax_t uoffset =
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sizeof(offset) == sizeof(int) ? (uintmax_t) (unsigned int) offset
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: (uintmax_t) offset;
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(void) close(0);
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(void) close(0);
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printf("%s(NULL, 0, PROT_NONE, MAP_FILE, 0, 0) = -1 EBADF (%m)\n",
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name);
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mmap(NULL, 0, PROT_NONE, MAP_FILE, 0, 0);
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p = mmap(addr, length1, PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANONYMOUS, fd, offset);
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if (MAP_FAILED == p)
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perror_msg_and_fail("mmap");
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printf("%s(%p, %lu, PROT_READ|PROT_WRITE, "
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"MAP_PRIVATE|MAP_ANONYMOUS, %d, %#jx) = %p\n",
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name, addr, length1, fd, uoffset, p);
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if (msync(p, length1, MS_SYNC))
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perror_msg_and_fail("msync");
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printf("msync(%p, %lu, MS_SYNC) = 0\n", p, length1);
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if (mprotect(p, length1, PROT_NONE))
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perror_msg_and_fail("mprotect");
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printf("mprotect(%p, %lu, PROT_NONE) = 0\n", p, length1);
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addr = mremap(p, length1, length2, 0);
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if (MAP_FAILED == addr)
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perror_msg_and_fail("mremap");
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printf("mremap(%p, %lu, %lu, 0) = %p\n", p, length1, length2, addr);
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p = mremap(addr, length2, length3, MREMAP_MAYMOVE | MREMAP_FIXED,
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addr + length2);
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if (MAP_FAILED == p)
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perror_msg_and_fail("mremap");
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printf("mremap(%p, %lu, %lu, MREMAP_MAYMOVE|MREMAP_FIXED"
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", %p) = %p\n", addr, length2, length3, addr + length2, p);
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if (munmap(p, length3))
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perror_msg_and_fail("munmap");
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printf("munmap(%p, %lu) = 0\n", p, length3);
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if (mlockall(MCL_FUTURE))
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perror_msg_and_fail("mlockall");
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puts("mlockall(MCL_FUTURE) = 0");
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puts("+++ exited with 0 +++");
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return 0;
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}
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