linux-kernel - Re: Re: [PATCH perf/core ] perf-probe: Fix to track down unnamed union/structure members

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Date:	Thu, 02 Apr 2015 12:49:47 +0900
From:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
CC:	Peter Zijlstra <peterz@...radead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>, namhyung@...nel.org,
	Jiri Olsa <jolsa@...hat.com>, Ingo Molnar <mingo@...nel.org>
Subject: Re: Re: [PATCH perf/core ] perf-probe: Fix to track down unnamed
 union/structure members

(2015/04/01 23:41), Arnaldo Carvalho de Melo wrote:
> Em Wed, Apr 01, 2015 at 06:08:17PM +0900, Masami Hiramatsu escreveu:
>> Ping?
> 
> <SNIP>
> 
>>> With this patch, perf probe can access unnamed fields.
>>>   -----
>>>   #./perf probe -nfx ./perf lock__delete ops 'locked_ops=ops->locked.ops'
>>>   Added new event:
>>>     probe_perf:lock__delete (on lock__delete in /home/mhiramat/ksrc/linux-3/tools/perf/perf with ops locked_ops=ops->locked.ops)
> 
>>>   You can now use it in all perf tools, such as:
> 
>>>           perf record -e probe_perf:lock__delete -aR sleep 1
>>>   -----
> 
>>> The original report of this issue is: https://lkml.org/lkml/2015/3/5/431
> 
> what am I doing wrong?
> 
> [root@...andy ~]# perf probe ~acme/bin/perf lock__delete 'locked_ops=ops'
> Added new event:
>   probe_perf:lock__delete (on lock__delete in /home/acme/bin/perf with locked_ops=ops)
> 
> You can now use it in all perf tools, such as:
> 
> 	perf record -e probe_perf:lock__delete -aR sleep 1
> 
> [root@...andy ~]# perf probe -d probe_perf:*
> Removed event: probe_perf:lock__delete
> [root@...andy ~]# perf probe ~acme/bin/perf lock__delete 'locked_ops=ops->locked'
> Semantic error: locked must be referred by '.'
>   Error: Failed to add events.
> [root@...andy ~]# perf probe ~acme/bin/perf lock__delete 'locked_ops=ops.locked'
> Semantic error: locked must be referred by '->'
>   Error: Failed to add events.
> [root@...andy ~]# perf probe ~acme/bin/perf lock__delete 'locked_ops=ops->locked'
> Semantic error: locked must be referred by '.'
>   Error: Failed to add events.
> [root@...andy ~]# perf probe ~acme/bin/perf lock__delete 'locked_ops=ops->locked.ops'
> Semantic error: locked must be referred by '.'
>   Error: Failed to add events.
> [root@...andy ~]#

Oops, thank you for reporting!
I must miss something...

Thank you,

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-- 
Masami HIRAMATSU
Linux Technology Research Center, System Productivity Research Dept.
Center for Technology Innovation - Systems Engineering
Hitachi, Ltd., Research & Development Group
E-mail: masami.hiramatsu.pt@...achi.com


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