Re: [PATCH V2 1/9] perf tools: add test for reading object code

From: Adrian Hunter
Date: Sat Aug 03 2013 - 15:38:22 EST

On 31/07/2013 8:46 p.m., Arnaldo Carvalho de Melo wrote:
Em Wed, Jul 31, 2013 at 02:28:33PM -0300, Arnaldo Carvalho de Melo escreveu:
Still investigating, but the attached patch is needed to handle such
failure cases:

[root@zoo ~]# perf test 21
21: Test object code reading : FAILED!
[root@zoo ~]# perf test -v 21

Lowering the freq to 4kHz gets me to where I think you was at this

[root@zoo ~]# perf test -v 21
21: Test object code reading :
--- start ---
Looking at the vmlinux_path (6 entries long)
symsrc__init: cannot get elf header.
Using /lib/modules/3.11.0-rc2+/build/vmlinux for symbols
Parsing event 'cycles'
Reading object code for memory address: 0xffffffff8101ce7d
File is: /lib/modules/3.11.0-rc2+/build/vmlinux
On file address is: 0xffffffff8101ce7d
dso__data_read_offset failed
---- end ----
Test object code reading: FAILED!
[root@zoo ~]#

I.e. we need the follow on patches to fix this issue, right?

Yes. It is using an "identity" map so the memory address and on-file address are the same - which doesn't work of course.

I'll merge my changes with your first patch and continue from there.

Please take V3.
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