linux-kernel - Re: uprobes: fix uprobe tracer wrong documentation

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Message-ID: <20120716111650.GA5272@linux.vnet.ibm.com>
Date:	Mon, 16 Jul 2012 16:46:50 +0530
From:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
To:	Jovi Zhang <bookjovi@...il.com>
Cc:	rob@...dley.net, Ingo Molnar <mingo@...hat.com>,
	linux-doc@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: uprobes: fix uprobe tracer wrong documentation

* Jovi Zhang <bookjovi@...il.com> [2012-07-16 16:49:03]:

> From e382d2d14b8177bcd2e6bac2fee004fd1f052cb5 Mon Sep 17 00:00:00 2001
> From: Jovi Zhang <bookjovi@...il.com>
> Date: Tue, 17 Jul 2012 00:35:30 +0800
> Subject: [PATCH] uprobes: fix uprobe tracer wrong documentation
> 
> The uprobe example is wrong in current kernel:
> $ echo 'p: /bin/bash:0x4245c0' > /sys/kernel/debug/tracing/uprobe_events
> -bash: echo: write error: Invalid argument
> 
> It should be as following:
> $ echo 'p /bin/bash:0x4245c0' > /sys/kernel/debug/tracing/uprobe_events

Right, the colon is only needed if we want to provide the optional event
name.

> 
> Signed-off-by: Jovi Zhang <bookjovi@...il.com>

Acked-by: Srikar Dronamraju <srikar@...ux.vnet.ibm.com>

> ---
>  Documentation/trace/uprobetracer.txt |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/Documentation/trace/uprobetracer.txt
> b/Documentation/trace/uprobetracer.txt
> index 24ce682..8932726 100644
> --- a/Documentation/trace/uprobetracer.txt
> +++ b/Documentation/trace/uprobetracer.txt
> @@ -40,7 +40,7 @@ Usage examples
>  To add a probe as a new event, write a new definition to uprobe_events
>  as below.
> 
> -  echo 'p: /bin/bash:0x4245c0' > /sys/kernel/debug/tracing/uprobe_events
> +  echo 'p /bin/bash:0x4245c0' > /sys/kernel/debug/tracing/uprobe_events
> 
>   This sets a uprobe at an offset of 0x4245c0 in the executable /bin/bash
> 
> -- 
> 1.7.9.7

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