linux-kernel - Re: Re: [PATCH v3 3/3] perf probe: Show better error message when failed to find variable

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20150511133527.GB28183@kernel.org>
Date:	Mon, 11 May 2015 10:35:27 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	He Kuang <hekuang@...wei.com>, Ingo Molnar <mingo@...nel.org>,
	a.p.zijlstra@...llo.nl, jolsa@...nel.org, mingo@...hat.com,
	wangnan0@...wei.com, linux-kernel@...r.kernel.org
Subject: Re: Re: [PATCH v3 3/3] perf probe: Show better error message when
 failed to find variable

Em Mon, May 11, 2015 at 09:02:47PM +0900, Masami Hiramatsu escreveu:
> On 2015/05/11 19:15, He Kuang wrote:
> > On 2015/5/11 17:50, Ingo Molnar wrote:
> >> * He Kuang <hekuang@...wei.com> wrote:
> >>> On 2015/5/11 17:30, Ingo Molnar wrote:
> >>>>> After this patch:
> >>>>>    $ perf probe --add 'generic_perform_write+118 bytes'
> >>>>>    Failed to find the location of bytes at this address.
> >>>> What does this sentence mean? I thought 'address' means 'location of
> >>>> bytes'. So the address identifies the location and obviously we know
> >>>> that. So this message wants to say something else.
> >>> 'generic_perform_write' is a function name, while 'bytes' is a local
> >>> variable in this function. Maybe the variable I chose make you confused.

> >>> This maybe clear:
> >>>    Failed to find the location of 'bytes' at this address.
> >> Yeah, absolutely! This highlights the importance of putting
> >> user-supplied symbols into quotes and such.

> >> Maybe even write:

> >>      Failed to find the location of the 'bytes' variable at this address.
 
> OK, He, could you also include this fix?

I agree with the change, makes things clearer, will do the change
myself. If He has any objection to that, I can fix things up before
pushing it to Ingo,

Thanks,

- Arnaldo
--
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/