linux-kernel - Re: [PATCH v20] tracing: Fix kconfig warning due to a typo

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Date:	Tue, 08 May 2012 13:29:48 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Christoph Hellwig <hch@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Anton Arapov <anton@...hat.com>,
	Stephen Boyd <sboyd@...eaurora.org>
Subject: Re: [PATCH v20] tracing: Fix kconfig warning due to a typo

On Tue, 2012-05-08 at 16:41 +0530, Srikar Dronamraju wrote:
> +    p:uprobes/p_zsh_0x46420 /bin/zsh:0x00046420 arg1=%ip arg2=%ax

can you also do things like:

 p:uprobes/ponies /bin/zsh:foo arg1=bar

when bar is either a function argument of foo (or an otherwise live
variable at the probe point)?

Only sampling register content is somewhat limiting, you might want to
have %ax[5] + 24 for example, or a pure memory deref -- and the dwarves
know where it all lives.
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