lkml.org 
[lkml]   [2014]   [Jul]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/2] perf tools: Ensure --symfs ends with '/'
Em Wed, Jul 30, 2014 at 08:52:36AM +0900, Namhyung Kim escreveu:
> Hi Arnaldo,
>
> On Tue, 29 Jul 2014 09:33:05 -0300, Arnaldo Carvalho de Melo wrote:
> > Em Tue, Jul 29, 2014 at 02:02:46PM +0900, Minchan Kim escreveu:
> >> On Fri, Jul 25, 2014 at 10:31:47AM +0900, Namhyung Kim wrote:
> >> > Minchan reported that perf failed to load vmlinux if --symfs argument
> >> > doesn't end with '/' character. So make sure that the symfs always
> >> > ends with the '/'.

> >> Both patches work and are handy to me.
> >> Thanks Namhyung.

> > I haven't said it is not :-) Just that it should be fixed in a different
> > way.

> I also thought about that way first but changed my mind to the current
> approach because I don't want to change current behavior.

> I worried about the common case which has empty symfs. By your patch,
> it makes a pathname absolute even with an empty symfs - I can see most
> filenames are already absolute paths but I'm not 100% sure it's always
> the case.

Yeah, after doing some research on the tools/perf/ 'git log' I got your point,
we can't add the / after symfs usages when it is "", i.e. we need something
like:

("%s%s%s, symfs, symfs[0] ? "/" : "", dso_name)

I.e. the equivalent of this:

[acme@zoo linux]$ python
Python 2.7.5 (default, Jun 25 2014, 10:19:55)
[GCC 4.8.2 20131212 (Red Hat 4.8.2-7)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> symfs = ""
>>> os.path.join(symfs, "dso_path")
'dso_path'
>>> symfs = "/home/acme/embedded_device_dsos"
>>> os.path.join(symfs, "dso_path")
'/home/acme/embedded_device_dsos/dso_path'
>>>

I'll try and get that in place.

- Arnaldo


\
 
 \ /
  Last update: 2014-07-31 06:01    [W:0.124 / U:0.488 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site