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Date: Mon, 11 Nov 2002 13:35:49 +0530
From: "Vamsi Krishna S ." <vamsi@in.ibm.com>
To: Rusty Lynch <rusty@linux.co.intel.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Multiple kprobes per address
Message-ID: <20021111133548.A16731@in.ibm.com>
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In-Reply-To: <200211082100.gA8L0Q515460@linux.intel.com>; from rusty@linux.co.intel.com on Fri, Nov 08, 2002 at 01:00:26PM -0800
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Hi,

On Fri, Nov 08, 2002 at 01:00:26PM -0800, Rusty Lynch wrote:
> I noticed that kprobes is designed around the idea of only allowing
> a single probe point per probe address.  Why not allow multiple probe
> points for a given probe address?  Is it a way of limiting complexity?
> 
We didn't think it would be useful and conceptually, it is simpler to
think of one probe at an address.

> It looks like it would be fairly straight forward to change get_kprobe(addr)
> to be get_kprobes(addr) where it returns a list of probe points associated
> with the address, and then tweak do_int3 to work through the entire list.
> Would such a change be acceptable?
> 
It will be trivial to add this, but why? Is there a good reason
for wanting to do this (multiple kprobes at same address) as opposed 
to doing all you want done on a probe hit in a single handler?

Regards,
Vamsi.
-- 
Vamsi Krishna S.
Linux Technology Center,
IBM Software Lab, Bangalore.
Ph: +91 80 5044959
Internet: vamsi@in.ibm.com
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