132 lines
3.0 KiB
Bash
Executable File
132 lines
3.0 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2013 EMC Corp.
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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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# "panic: vm_pageout_flush: partially invalid page xx index 0/1" seen.
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# Fixed in r255566.
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. ../default.cfg
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dir=/tmp
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odir=`pwd`
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cd $dir
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sed '1,/^EOF/d' < $odir/$0 > $dir/msync2.c
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mycc -o msync2 -Wall -Wextra msync2.c || exit 1
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rm -f msync2.c
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cd $odir
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dd if=/dev/zero bs=$((4096 + 1)) of=/tmp/msync2.inputfile count=1 \
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status=none
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/tmp/msync2 /tmp/msync2.inputfile
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rm -f /tmp/msync2 /tmp/msync2.inputfile
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exit
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EOF
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#include <sys/param.h>
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#include <sys/fcntl.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <err.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <time.h>
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#include <unistd.h>
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#define RUNTIME 400
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const char *file;
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char c;
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void
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wr(void)
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{
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struct stat st;
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char *p1;
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size_t len;
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int error, fd;
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if ((fd = open(file, O_RDWR)) == -1)
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err(1, "open %s", file);
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if ((error = fstat(fd, &st)) == -1)
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err(1, "stat(%s)", file);
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len = round_page(st.st_size);
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if ((p1 = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) ==
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MAP_FAILED)
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err(1, "mmap");
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// p1[len - 1] = 1; /* No panic with this */
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p1[arc4random() % len] = 1; /* Need this for the panic */
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if ((error = msync(p1, len, MS_SYNC | MS_INVALIDATE)) == -1)
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if (errno != EBUSY)
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err(1, "msync");
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if (munmap(p1, len) == -1)
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err(1, "unmap()");
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close(fd);
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_exit(0);
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}
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void
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test(void)
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{
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#if 1
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int i;
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for (i = 0; i < 3; i++)
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if (fork() == 0)
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wr();
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for (i = 0; i < 3; i++)
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wait(NULL);
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#else
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wr(); /* No problem here */
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#endif
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_exit(0);
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}
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int
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main(int argc, char *argv[])
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{
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time_t start;
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if (argc != 2)
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errx(1, "Usage: %s <file>", argv[0]);
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file = argv[1];
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start = time(NULL);
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while (time(NULL) - start < RUNTIME) {
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if (fork() == 0)
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test();
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wait(NULL);
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}
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return (0);
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}
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