2 * Copyright (c) 1995 - 2001 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 #include <sys/types.h>
52 generate_file(const char *filename, int randomp, size_t sz)
60 err(1, "malloc %u", (unsigned)sz);
62 fd = open(filename, O_WRONLY | O_CREAT, 0666);
64 err(1, "open %s", filename);
66 for (i = 0; i < sz; ++i)
72 if (write(fd, buf, sz) != sz)
79 static unsigned char *
80 read_file(int fd, size_t sz)
87 err(1, "malloc %u", (unsigned)sz);
88 ret = read(fd, buf, sz);
92 errx(1, "short read %d < %u", (int)ret, (unsigned)sz);
97 #define MAP_FAILED ((void *)-1)
101 mmap_file(int fd, size_t sz)
105 ret = mmap(0, sz, PROT_READ, MAP_PRIVATE, fd, 0);
106 if (ret == (void *)MAP_FAILED)
111 static void __attribute__ ((__unused__))
112 print_area(unsigned char *ptr, size_t len)
123 unsigned char *malloc_buf;
126 const char *file = "foo";
127 const size_t sz = 3 * getpagesize() / 2;
129 generate_file(file, randomp, sz);
131 fd = open(file, O_RDONLY, 0);
133 err(1, "open %s", file);
135 mmap_buf = mmap_file(fd, sz);
136 malloc_buf = read_file(fd, sz);
139 if (memcmp(malloc_buf, mmap_buf, sz) != 0) {
141 printf("type: %s\n", randomp ? "random" : "allzero");
143 print_area(malloc_buf, sz);
145 print_area(mmap_buf, sz);
154 main(int argc, char **argv)