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107 lines
2.8 KiB
Bash
Executable file
107 lines
2.8 KiB
Bash
Executable file
#!/bin/sh
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#
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# Copyright (c) 2008 Peter Holm <pho@FreeBSD.org>
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# Stopped at devfs_open+0x23f: pushl 0x14(%ebx)
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# db> where
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# Tracing pid 46017 tid 100350 td 0xc4c08510
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# devfs_open(e6d06a10) at devfs_open+0x23f
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# VOP_OPEN_APV(c09edda0,e6d06a10) at VOP_OPEN_APV+0x9b
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# vn_open_cred(e6d06b78,e6d06c78,0,c4883900,3,...) at vn_open_cred+0x41e
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# vn_open(e6d06b78,e6d06c78,0,3) at vn_open+0x1e
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# kern_open(c4c08510,8048887,0,1,0,...) at kern_open+0xb7
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# open(c4c08510,e6d06d00) at open+0x18
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# syscall(e6d06d38) at syscall+0x252
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# Test scenario by kib@freebsd.org
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. ../default.cfg
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odir=`pwd`
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dir=/tmp
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cd $dir
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sed '1,/^EOF/d' < $odir/$0 > $dir/devfs2.c
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mycc -o devfs2 -Wall devfs2.c -lthr || exit 1
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rm -f devfs2.c
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./devfs2
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rm devfs2
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exit 0
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EOF
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#include <pthread.h>
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#include <stdio.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <string.h>
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#include <err.h>
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void *
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thr1(void *arg)
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{
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int fd;
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int i;
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for (i = 0; i < 1024; i++) {
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if ((fd = open("/dev/zero", O_RDONLY)) == -1)
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perror("open /dev/zero");
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close(fd);
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}
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return (0);
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}
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void *
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thr2(void *arg)
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{
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int i;
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for (i = 0; i < 1024; i++)
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close(3);
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return (0);
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}
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int
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main()
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{
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pthread_t threads[2];
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int i;
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int r;
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if ((r = pthread_create(&threads[0], NULL, thr1, 0)) != 0)
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err(1, "pthread_create(): %s\n", strerror(r));
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if ((r = pthread_create(&threads[1], NULL, thr2, 0)) != 0)
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err(1, "pthread_create(): %s\n", strerror(r));
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for (i = 0; i < 2; i++)
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if ((r = pthread_join(threads[i], NULL)) != 0)
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errc(1, r, "pthread_join(%d)", i);
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return (0);
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}
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