Re: [Qemu-devel] TCG questions

[Xin Tong]

I have the code on http://code.google.com/p/qemu-trace/. I currently
have memory trace, branch trace and some special instructions traces
ready ( unverified though). we should discuss about what is the best
way to do this btw.

Xin


On Wed, Sep 12, 2012 at 10:09 AM, Xin Tong <address@hidden> wrote:
> On Wed, Sep 12, 2012 at 6:14 AM, Lluís Vilanova <address@hidden> wrote:
>> Xin Tong writes:
>>
>>> i do not know. could be similar. I am doing architecture research. i
>>> need traces of memory access for programming running under a full
>>> system environment, so i wrote this.
>>
>>> i do nto seem to be able to access the linked provided from the link
>>> you give me though.
>>
>>> https://projects.gso.ac.upc.edu/projects/qemu-dbi/wiki
>>
>> Well, if you tried to access it during the last few days, we've been having 
>> some
>> issues with the server.
>>
>> It should all work now.
>>
>> The main idea is to have an API similar in spirit to that of PIN [1]. You can
>> have a look at the instrumentation docs [2] for some simple examples.
>>
>> I had some plans to modify QEMU's address translation mechanism to provide a
>> performant mechanism to retrieve physical addresses (traces of virtual 
>> addresses
>> are already supported), but that will have to wait until I finish some other
>> unrelated tasks.
>>
>>
>> [1] http://pintool.org
>> [2] 
>> https://projects.gso.ac.upc.edu/projects/qemu-dbi/repository/entry/docs/instrumentation.txt#L202
>
> By the way Luis. this is exactly what i am doing. i am writing up a
> ISPASS paper for this as well. I am also using PIN to verify the
> instrumentation interface.
>
> Xin
>
>>
>> Lluis
>>
>>
>>
>>> On Tue, Sep 11, 2012 at 6:52 PM, 陳韋任 (Wei-Ren Chen)
>>> <address@hidden> wrote:
>>>>> I have created a set of instrument API on QEMU. one can write client
>>>>> programs that compile into shared library. the shared library is then
>>>>> loaded into qemu and extract statistics out of QEMU.
>>>>
>>>> Instrument API? Same as what Liuis did?
>>>>
>>>> Regards,
>>>> chenwj
>>>>
>>>> [1] http://lists.gnu.org/archive/html/qemu-devel/2012-09/msg00379.html
>>>>
>>>> --
>>>> Wei-Ren Chen (陳韋任)
>>>> Computer Systems Lab, Institute of Information Science,
>>>> Academia Sinica, Taiwan (R.O.C.)
>>>> Tel:886-2-2788-3799 #1667
>>>> Homepage: http://people.cs.nctu.edu.tw/~chenwj
>>
>>
>> --
>>  "And it's much the same thing with knowledge, for whenever you learn
>>  something new, the whole world becomes that much richer."
>>  -- The Princess of Pure Reason, as told by Norton Juster in The Phantom
>>  Tollbooth