Date: Fri, 3 Jul 1998 14:21:47 +0200 From: Christoph Kukulies <kuku@gilberto.physik.RWTH-Aachen.DE> To: "Jonathan M. Bresler" <jmb@FreeBSD.ORG> Cc: Christoph Kukulies <kuku@gilberto.physik.RWTH-Aachen.DE>, freebsd-hackers@freefall.cdrom.com Subject: Re: trace/KTRACE Message-ID: <19980703142147.60917@gil.physik.rwth-aachen.de> In-Reply-To: <199807031155.EAA15761@hub.freebsd.org>; from Jonathan M. Bresler on Fri, Jul 03, 1998 at 04:55:26AM -0700 References: <199807030924.LAA20365@gilberto.physik.RWTH-Aachen.DE> <199807031155.EAA15761@hub.freebsd.org>
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On Fri, Jul 03, 1998 at 04:55:26AM -0700, Jonathan M. Bresler wrote:
> Christoph Kukulies wrote:
> >
> > Or are there any other ways (other than profiling, which is also an a
> > posteriori method) to 'watch' what an app does?
>
> Sean Eric Fagan (sp?) wrote a truss for FreeBSD.
> write-up appeared in Dr Dobb's Journal.
>
> is this what you are looking for?
Yes, exactly. /usr/bin/truss is the solution.
>
> Aspen:[10] truss cat /etc/resolv.conf
> syscall open("/etc/resolv.conf",0,00)
> returns 3 (0x3)
> syscall fstat(1,0xefbfd754)
> returns 0 (0x0)
> syscall readlink("/etc/malloc.conf",0xefbfd6e0,63)
> errno 2 'No such file or directory'
> syscall mmap(0x0,4096,0x3,0x1002,-1,0x0)
> returns 536924160 (0x2000d000)
> syscall break(0x12000)
> returns 0 (0x0)
> syscall break(0x22000)
> returns 0 (0x0)
> syscall read(0x3,0x12000,0x10000)
> returns 161 (0xa1)
> search frb.gov covance.com atinc.com
> namsserver 192.168.250.1 # ourselves
> nameserver 198.35.131.208 # primary.frb.gov
> nameserver 198.35.166.183 # irmmp4.frb.gov
> syscall write(1,0x12000,161)
> returns 161 (0xa1)
> syscall read(0x3,0x12000,0x10000)
> returns 0 (0x0)
> syscall close(3)
> returns 0 (0x0)
> syscall close(1)
> returns 0 (0x0)
> syscall exit(0x0)
> process exit, rval = 0
>
>
> jmb
--
--Chris Christoph P. U. Kukulies kuku@gil.physik.rwth-aachen.de
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