linux-kernel - Re: [RFC PATCH] Tracepoint: add exec tracepoint

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Tue, 18 Oct 2011 16:26:48 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	David Smith <dsmith@...hat.com>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH] Tracepoint: add exec tracepoint

On Tue, 2011-10-18 at 14:31 -0500, David Smith wrote:
> On 10/18/2011 01:58 PM, Christoph Hellwig wrote:
> 
> > On Tue, Oct 18, 2011 at 01:41:35PM -0500, David Smith wrote:
> >> Added general purpose exec tracepoint.  The 'bprm' argument gives details of the exec.
> > 
> > Given that you only need the filename from the bprm please just pass
> > it directly.
> 
> 
> Thanks for looking at the patch.
> 
> I'm not totally opposed to this change, but passing bprm allows custom
> tracepoint handlers to look at other fields in bprm besides filename,
> which could be useful (depending on your needs).

I like flexible tracepoints too.

> 
> But, I don't have a real strong opinion here.
> 

I rather pass the pointer. If we pass the string, gcc may not optimize
when tracing is disabled and still do the work to dereference the
pointer unnecessarily.

-- Steve



--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/