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 # Stress mmap by having at most 100 threads mapping random areas within
34 # Test scenario by kib@
38 sed '1,/^EOF/d' < $odir/$0 > mmap2.c
39 cc -o mmap2 -Wall mmap2.c -lpthread
49 #include <sys/types.h>
57 #include <sys/param.h>
63 #define STARTADDR 0x50000000U
64 #define ADRSPACE 0x06400000U /* 100 Mb */
74 p = (void *)STARTADDR + trunc_page(arc4random() % ADRSPACE);
75 left = ADRSPACE - (size_t)p + STARTADDR;
76 len = trunc_page(arc4random() % left) + PAGE_SIZE;
79 if (arc4random() % 100 < 90)
80 sprintf(path, "/tmp/mmap.%06d.%04d", getpid(), nr);
82 sprintf(path, "/dev/zero");
83 if (arc4random() % 2 == 0) {
84 if ((fd = open(path, O_CREAT | O_TRUNC | O_RDWR, 0622)) == -1)
86 if (ftruncate(fd, len) == -1)
88 if (arc4random() % 2 == 0) {
89 if ((p = mmap(p, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) ==
96 if ((p = mmap(p, len, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0)) ==
103 if (fd > 0 && strcmp(path, "/dev/zero"))
104 if (unlink(path) == -1)
105 err(1, "unlink(%s)", path);
107 if ((p = mmap(p, len, PROT_READ | PROT_WRITE, MAP_ANON, -1, 0)) == MAP_FAILED) {
112 strcpy(path, "anon");
115 printf("nr = %d, %-14s, start = %p, end = %p, len = 0x%08x, (%5d pages)\n",
116 nr, path, p, p + len, len, len>>PAGE_SHIFT);
121 if (arc4random() % 2 == 0) {
122 m = arc4random() % 10;
123 if (madvise(p, len, m) == -1)
124 warn("madvise(%p, %d, %d)", p, len, m);
126 if (arc4random() %2 == 0)
127 if (mprotect(p, trunc_page(arc4random() % len), PROT_READ) == -1 )
128 err(1, "mprotect failed with error:");
129 if (arc4random() % 2 == 0) {
130 if (arc4random() %2 == 0) {
131 if (msync(p, 0, MS_SYNC) == -1)
132 err(1, "msync(%p)", p);
134 if (msync(p, 0, MS_INVALIDATE) == -1)
135 err(1, "msync(%p)", p);
138 if (munmap(p, len) == -1)
139 err(1, "munmap(%p)", p);
148 for (i = 0; i < 512; i++) {
155 main(int argc, char **argv)
157 pthread_t threads[THREADS];
161 // printf("Address start 0x%x, address end 0x%x, pages %d\n",
162 // STARTADDR, STARTADDR + ADRSPACE, ADRSPACE>>PAGE_SHIFT);
163 n = arc4random() % THREADS + 1;
164 for (i = 0; i < n; i++) {
166 if ((r = pthread_create(&threads[i], NULL, thr, (void *)&nr[i])) != 0)
167 err(1, "pthread_create(): %s\n", strerror(r));
170 for (i = 0; i < n; i++) {
171 if (pthread_join(threads[i], NULL) != 0)
172 err(1, "pthread_join(%d)", i);