From: Ingo Molnar <mingo@elte.hu>
To: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: linux-kernel@vger.kernel.org, systemtap@sources.redhat.com,
"Frank Ch. Eigler" <fche@redhat.com>
Subject: Re: System call instrumentation
Date: Mon, 5 May 2008 13:10:29 +0200 [thread overview]
Message-ID: <20080505111029.GA9948@elte.hu> (raw)
In-Reply-To: <20080505105915.GA26444@Krystal>
* Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> wrote:
> > hm, i'm not sure about this. I've implemented system call tracing in
> > -rt [embedded in the latency tracer] and it only needed changes in
> > entry.S, not in every system call site. Now, granted, that tracer
> > was simpler than what LTTng tries to do, but do we _really_ need
> > more complexity? A trace point that simply expresses:
> >
> > sys_call_event(int sysno, long param1, long param2, long param3,
> > long param4, long param5, long param6);
> >
>
> That would work for all system calls that doesn't have parameters like
> "const char __user *filename".
what's the problem with them? Do you want to follow those parameters?
Ingo
next prev parent reply other threads:[~2008-05-05 11:11 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-04 13:48 System call instrumentation Mathieu Desnoyers
2008-05-05 6:55 ` Ingo Molnar
2008-05-05 10:59 ` Mathieu Desnoyers
2008-05-05 11:10 ` Ingo Molnar [this message]
2008-05-05 11:30 ` Mathieu Desnoyers
2008-05-05 12:28 ` Ingo Molnar
2008-05-06 20:52 ` Masami Hiramatsu
2008-05-20 3:44 ` Mathieu Desnoyers
2008-05-20 14:18 ` Arjan van de Ven
2008-05-22 12:47 ` Mathieu Desnoyers
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