Date: Sat, 2 Feb 2002 15:07:23 -0800 From: Alfred Perlstein <alfred@freebsd.org> To: Dag-Erling Smorgrav <des@ofug.org> Cc: current@freebsd.org Subject: Re: fstat dumps core Message-ID: <20020202150723.J10817@elvis.mu.org> In-Reply-To: <xzpsn8kxa8r.fsf@flood.ping.uio.no>; from des@ofug.org on Sat, Feb 02, 2002 at 02:51:32PM %2B0100 References: <xzpsn8kxa8r.fsf@flood.ping.uio.no>
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* Dag-Erling Smorgrav <des@ofug.org> [020202 05:51] wrote:
> # gdb =fstat
> [...]
> (gdb) break 349
> Breakpoint 1 at 0x8049110: file /usr/src/usr.bin/fstat/fstat.c, line 349.
> (gdb) run
> Starting program: /usr/bin/fstat
> USER CMD PID FD MOUNT INUM MODE SZ|DV R/W
> root fstat 13709 root / 2 drwxr-xr-x 1536 r
> root fstat 13709 wd /usr 368364 drwxr-xr-x 512 r
> root fstat 13709 text /usr 351906 -r-xr-sr-x 129809 r
>
> Breakpoint 1, dofiles (kp=0x8050000) at /usr/src/usr.bin/fstat/fstat.c:349
> 349 bcopy(filed0.fd_dfiles, ofiles, (filed.fd_lastfile+1) * FPSIZE);
> (gdb) p filed0.fd_fd.fd_lastfile + 1
> $1 = 327686
> (gdb) p filed0.fd_dfiles
> $2 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x100, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}
> (gdb) c
> Continuing.
>
> Program received signal SIGBUS, Bus error.
> 0x280fec8a in bcopy () from /usr/lib/libc.so.5
> (gdb) where
> #0 0x280fec8a in bcopy () from /usr/lib/libc.so.5
> #1 0x0 in ?? ()
>
> fd_lastfile is obviously bogus. Alfred, is this a consequence of your
> fd work in the kernel?
Er.... I dunno, I'll look at it.
--
-Alfred Perlstein [alfred@freebsd.org]
'Instead of asking why a piece of software is using "1970s technology,"
start asking why software is ignoring 30 years of accumulated wisdom.'
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