4 # Copyright (c) 2009 Peter Holm <pho@FreeBSD.org>
7 # Redistribution and use in source and binary forms, with or without
8 # 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.
12 # 2. Redistributions in binary form must reproduce the above copyright
13 # notice, this list of conditions and the following disclaimer in the
14 # documentation and/or other materials provided with the distribution.
16 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 # Variation of mmap2.sh with focus on random arguments for mprotect()
35 sed '1,/^EOF/d' < $odir/$0 > mmap3.c
36 cc -o mmap3 -Wall mmap3.c -lpthread
42 for i in `jot 100`; do
45 rm -f mmap3 mmap3.core /tmp/mmap.0*
50 Stress mmap by having max 18 threads mapping random areas within
53 #include <sys/types.h>
61 #include <sys/param.h>
67 #define STARTADDR 0x50000000U
68 #define ADRSPACE 0x06400000U /* 100 Mb */
76 mprotect(p, 0x570e3d38, 0x2c8fd54f);
79 madvise((void *)arc4random(), arc4random(), arc4random());
80 mprotect((void *)arc4random(), arc4random(), arc4random());
81 msync((void *)arc4random(), arc4random(), arc4random());
94 p = (void *)STARTADDR;
97 sprintf(path, "/tmp/mmap.%06d.%04d", getpid(), nr);
98 if ((fd = open(path, O_CREAT | O_TRUNC | O_RDWR, 0622)) == -1)
100 if (ftruncate(fd, len) == -1)
102 if ((p = mmap(p, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) ==
108 if (unlink(path) == -1)
109 err(1, "unlink(%s)", path);
113 m = arc4random() % 10;
114 if (madvise(p, len, m) == -1)
115 warn("madvise(%p, %d, %d)", p, len, m);
116 if (mprotect(p, trunc_page(arc4random() % len), PROT_READ) == -1 )
117 err(1, "mprotect failed with error:");
118 if (msync(p, 0, MS_SYNC) == -1)
119 err(1, "msync(%p)", p);
120 if (munmap(p, len) == -1)
121 err(1, "munmap(%p)", p);
130 for (i = 0; i < 512; i++) {
137 main(int argc, char **argv)
139 pthread_t threads[THREADS];
143 n = arc4random() % 14 + 5;
145 // printf("Address start 0x%x, address end 0x%x, pages %d, n %d\n",
146 // STARTADDR, STARTADDR + ADRSPACE, ADRSPACE>>PAGE_SHIFT, n);
147 for (i = 0; i < n; i++) {
149 if ((r = pthread_create(&threads[i], NULL, thr, (void *)&nr[i])) != 0)
150 err(1, "pthread_create(): %s\n", strerror(r));
153 for (i = 0; i < n; i++) {
154 if (pthread_join(threads[i], NULL) != 0)
155 err(1, "pthread_join(%d)", i);