Re: relations between oprofile and libopagent library

[Xin T. <xer...@gm...>]

On Tue, May 29, 2012 at 3:44 PM, Xin Tong <xer...@gm...> wrote:
> On Tue, May 29, 2012 at 3:06 PM, Maynard Johnson <may...@us...> wrote:
>> On 05/29/2012 01:14 PM, Xin Tong wrote:
>>> what is the relationship between oprofiled and libopagent library. i
>>> have a binary translator that is generating code on the fly. i have
>>> libopagent library loaded into my binary translator and on every
>>> translation i call the op_write_native_code function. on the other
>>> hand, i am running oprofiled, however, the oprofile still can not
>>> recognized the translated code.
>> Xin, please read http://oprofile.sourceforge.net/doc/devel/index.html.  If you still have questions, feel free to post a follow-up.
>>
>> -Maynard
>>>
>>> Thanks
>>>
>>>
>>> Xin
>>>
>
> I was looking at this document when i intergrated libopagent into my
> binary translator. I do see the jitdump being created and my
> translated code being registered there. but how can i get opreport to
> process it ?

Ok , i got it working. I was not register the dynamically generated
traces correctly. I am running into another problem. there is a lock
that is never released in op_write_native_code. the call stack looks
like this. do you know which file op_write_native_code is trying to
hold a lock on ? and who else could possible hold the lock ?

#0  0x000000377b4f542e in __lll_lock_wait_private () from /lib64/libc.so.6
#1  0x000000377b4639e5 in _L_lock_23 () from /lib64/libc.so.6
#2  0x000000377b4639c6 in flockfile () from /lib64/libc.so.6
#3  0x00007ffff7b1d672 in op_write_native_code () from
/usr/lib64/oprofile/libopagent.so
#4  0x000000007106eea8 in emit_fragment_common (dcontext=0x40006a80,
tag=0x377b47413d "H\213\203\210", ilist=0x40097860, flags=0,
vmlist=0x400f3d60,
    link_fragment=true, add_to_htable=true, replace_fragment=0x0) at
/home/xtong/dynamorio-5-26-2012/core/emit.c:977

Thanks


>
> Thanks
>
> Xin
>
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