lkml.org 
[lkml]   [2018]   [May]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 1/2] perf script: Show virtual addresses instead of offsets
From
Date
Arnaldo,

We already have a binary offset handy in perf code but there is no way to
dump it with perf script. We can derive it from symname+symoff but that's
a manual work.

Will it be good to have a '-F binoff' option?

Ravi


On 05/18/2018 01:29 AM, Arnaldo Carvalho de Melo wrote:
> Em Thu, May 17, 2018 at 12:03:25PM +0530, Sandipan Das escreveu:
>> When perf data is recorded with the call-graph option enabled,
>> the callchain shown by perf script shows the binary offsets of
>> the symbols as the ip. This is incorrect for kernel symbols as
>> the ip values are always off by a fixed offset depending on the
>> architecture. If the offsets from the start of the symbols are
>> printed, they are also incorrect for both kernel and userspace
>> symbols.
>>
>> Without the call-graph option, the callchain shows the virtual
>> addresses of the symbols rather than their binary offsets. The
>> offsets printed in this case are also correct.
>>
>> This fixes the inconsistency in perf script's output.
>
> Thanks, tested and applied,
>
> - Arnaldo
>

\
 
 \ /
  Last update: 2018-05-18 06:34    [W:0.076 / U:6.500 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site