linux-kernel - Building a tracing userspace tool in the kernel tree

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Message-ID: <20081009191626.GA29344@Krystal>
Date:	Thu, 9 Oct 2008 15:16:26 -0400
From:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
To:	Sam Ravnborg <sam@...nborg.org>, linux-kernel@...r.kernel.org
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Building a tracing userspace tool in the kernel tree

Hi Sam,

At the kernel summit, people seemed to be interested to have the basic
userspace tools required to extract and pretty-print a trace available
within the kernel tree. Therefore, what I am trying to do is something
along the lines of

ltt/usr/
ltt/usr/tracectl/    (control tracing)
ltt/usr/tracesplice/ (splice buffers to disk)
ltt/usr/tracecat/    (merge sort and format the binary buffers into
                      human-readable text)

That would however require to create a Makefile which behaves a little
bit like what scripts/ is currently doing with hostprogs-y, only that
it's different in the sense that those tools are not required to build
the kernel and this could therefore become a more standard part of the
build process than what scripts/ is.

Is there some magic statements to put in Makefile and ltt/Makefile to
get this to build nicely with the rest of the tree ?

Thanks,

Mathieu

-- 
Mathieu Desnoyers
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68
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