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
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 #include <sys/types.h>
56 generate_file (const char *filename, int randomp, size_t sz)
64 err (1, "malloc %u", (unsigned)sz);
66 fd = open (filename, O_WRONLY | O_CREAT, 0666);
68 err (1, "open %s", filename);
70 for (i = 0; i < sz; ++i)
76 if (write (fd, buf, sz) != sz)
84 read_file (int fd, size_t sz)
91 err (1, "malloc %u", (unsigned)sz);
92 ret = read (fd, buf, sz);
96 errx(1, "short read %d < %u", (int)ret, (unsigned)sz);
101 #define MAP_FAILED ((void *)-1)
105 mmap_file (int fd, size_t sz)
109 ret = mmap (0, sz, PROT_READ, MAP_SHARED, fd, 0);
110 if (ret == (void *)MAP_FAILED)
115 static void __attribute__ ((__unused__))
116 print_area (unsigned char *ptr, size_t len)
125 do_test (int randomp)
127 unsigned char *malloc_buf;
130 const char *file = "foo";
131 const size_t sz = 4 * getpagesize();
133 generate_file (file, randomp, sz);
135 fd = open (file, O_RDONLY, 0);
137 err (1, "open %s", file);
139 mmap_buf = mmap_file (fd, sz);
140 malloc_buf = read_file (fd, sz);
143 if (memcmp (malloc_buf, mmap_buf, sz) != 0) {
145 printf ("type: %s\n", randomp ? "random" : "allzero");
147 print_area (malloc_buf, sz);
149 print_area (mmap_buf, sz);
158 main (int argc, char **argv)