test/stress/stress2/misc/devfs2.sh

   1 #!/bin/sh
   2
   3 #
   4 # Copyright (c) 2008 Peter Holm <pho@FreeBSD.org>
   5 # All rights reserved.
   6 #
   7 # Redistribution and use in source and binary forms, with or without
   8 # modification, are permitted provided that the following conditions
   9 # are met:
  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.
  15 #
  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
  26 # SUCH DAMAGE.
  27 #
  28 # $FreeBSD$
  29 #
  30
  31 # Stopped at      devfs_open+0x23f:       pushl   0x14(%ebx)
  32 # db> where
  33 # Tracing pid 46017 tid 100350 td 0xc4c08510
  34 # devfs_open(e6d06a10) at devfs_open+0x23f
  35 # VOP_OPEN_APV(c09edda0,e6d06a10) at VOP_OPEN_APV+0x9b
  36 # vn_open_cred(e6d06b78,e6d06c78,0,c4883900,3,...) at vn_open_cred+0x41e
  37 # vn_open(e6d06b78,e6d06c78,0,3) at vn_open+0x1e
  38 # kern_open(c4c08510,8048887,0,1,0,...) at kern_open+0xb7
  39 # open(c4c08510,e6d06d00) at open+0x18
  40 # syscall(e6d06d38) at syscall+0x252
  41
  42 # Test scenario by kib@freebsd.org
  43
  44 odir=`pwd`
  45 dir=/tmp
  46
  47 cd $dir
  48 sed '1,/^EOF/d' < $odir/$0 > $dir/devfs2.c
  49 cc -o devfs2 -Wall devfs2.c -lthr
  50 rm -f devfs2.c
  51
  52 ./devfs2
  53
  54 rm devfs2
  55
  56 exit
  57
  58 EOF
  59 #include <pthread.h>
  60 #include <stdio.h>
  61 #include <signal.h>
  62 #include <stdlib.h>
  63 #include <unistd.h>
  64 #include <fcntl.h>
  65 #include <string.h>
  66 #include <err.h>
  67
  68 void *
  69 thr1(void *arg)
  70 {
  71         int fd;
  72         int i;
  73
  74         for (i = 0; i < 1024; i++) {
  75                 if ((fd = open("/dev/zero", O_RDONLY)) == -1)
  76                         perror("open /dev/zero");
  77                 close(fd);
  78         }
  79         return (0);
  80 }
  81
  82 void *
  83 thr2(void *arg)
  84 {
  85         int i;
  86         for (i = 0; i < 1024; i++)
  87                 close(3);
  88         return (0);
  89 }
  90
  91 int
  92 main()
  93 {
  94         pthread_t threads[2];
  95         int i;
  96         int r;
  97
  98         if ((r = pthread_create(&threads[0], NULL, thr1, 0)) != 0)
  99                 err(1, "pthread_create(): %s\n", strerror(r));
 100         if ((r = pthread_create(&threads[1], NULL, thr2, 0)) != 0)
 101                 err(1, "pthread_create(): %s\n", strerror(r));
 102
 103         for (i = 0; i < 2; i++)
 104                 if (pthread_join(threads[i], NULL) != 0)
 105                         err(1, "pthread_join(%d)", i);
 106
 107         return (0);
 108 }