[panda-users] Fwd: confused about panda_ssltut.md

[Brendan Dolan-Gavitt]

The "begin_record ssltut" command creates two files: ssltut-rr-snp and
ssltut-rr-nondet.log. As long as you type "end_record" in the monitor,
the recording will complete successfully.

You can't use the ssltut-rr-snp file as a snapshot with -loadvm,
because PANDA's record/replay system has changed since the SSL
tutorial was written and no longer saves a snapshot inside the QCOW.

To do the replay just do:

qemu-system-x86_64 -replay ssltut

And you should see progress messages printed to the screen as it runs
the replay.

-Brendan

On Tue, Mar 24, 2015 at 8:42 PM, xiaojuan Li <xiaotan6666 at gmail.com> wrote:
> the process is this:
> I used qemu-system-x86_64 to boot
> system(debian_squeeze_i386_standard.qcow2),then in the qemu monitor,I input
> "begin_record ssltut",after did something in that system,I input
> "end_record",this should create ssltut-rr-snp,and then when I use
> "qemu-system-x86_64 ***** *****
> -loadvm ssltut-rr-snp",it just showed the problem I described before.
> so I have that question how can I make sure that the record finishes?If
> so,why the ssltut-rr-snp shows nothing?
> Thanks!
>
> 2015-03-25 8:11 GMT+08:00 Brendan Dolan-Gavitt <brendandg at gatech.edu>:
>>
>> Could you post the command line you are using to run the replay? If
>> you have a recording named "foo" that you made by doing "begin_record
>> foo", you should be able to replay it by doing.
>>
>> x86_64-softmmu/qemu-system-x86_64 -replay foo
>>
>> If the recording was made on something other than x86_64, you will
>> have to adjust the architecture. Also, if the recording used a
>> different amount of RAM than 128 MB, you will need to use the -m
>> option to set the correct amount of RAM.
>>
>> -Brendan
>>
>> On Tue, Mar 24, 2015 at 7:54 PM, xiaojuan Li <xiaotan6666 at gmail.com>
>> wrote:
>> >
>> > ---------- Forwarded message ----------
>> > From: xiaojuan Li <xiaotan6666 at gmail.com>
>> > Date: 2015-03-24 20:42 GMT+08:00
>> > Subject: Re: [panda-users] confused about panda_ssltut.md
>> > To: Brendan Dolan-Gavitt <brendandg at gatech.edu>
>> >
>> >
>> > Now,I find a problem with the record:when I input "end_record",I am not
>> > sure
>> > that its record has finished,and when I use the .snp to do replay, the
>> > qemu
>> > monitor just shows the black terminal with nothing not the system used
>> > before. so I guess that the record action has something wrong.
>> > Suggestions?
>> > Thanks!
>> >
>> > 2015-03-24 8:23 GMT+08:00 xiaojuan Li <xiaotan6666 at gmail.com>:
>> >>
>> >> I see.Thanks a lot!
>> >>
>> >> 2015-03-23 21:44 GMT+08:00 Brendan Dolan-Gavitt <brendandg at gatech.edu>:
>> >>>
>> >>> Once you see the "opening nondet log for write" message, the recording
>> >>> has started. You should be able to use the virtual machine at this
>> >>> point. If you press "enter" in the QEMU monitor you will see the
>> >>> monitor prompt "(qemu)" and can enter further commands, or just
>> >>> interact with the VM directly. When you're done, you can do
>> >>> "end_record" in the monitor to stop the recording.
>> >>>
>> >>> Note that some of the information in PANDA's SSL tutorial is slightly
>> >>> outdated; there is an open bug in the bug tracker:
>> >>>
>> >>> https://github.com/moyix/panda/issues/8
>> >>>
>> >>> And I will try to find some time soon to bring it up to date.
>> >>>
>> >>> -Brendan
>> >>>
>> >>> On Mon, Mar 23, 2015 at 3:38 AM, xiaojuan Li <xiaotan6666 at gmail.com>
>> >>> wrote:
>> >>> > Hi,
>> >>> > Thanks for your guys work first!
>> >>> > Now my question is: when I tried process described in the
>> >>> > docs/panda_ssltut.md,I was confused about "Taking the snapshot can
>> >>> > take
>> >>> > a
>> >>> > long time.once the snapshot is made, the vm will resume." Is it
>> >>> > means
>> >>> > that I
>> >>> > must wait till the vm resume?and then i can take the next step?
>> >>> > But I have stayed this step for a long time,it seems not to
>> >>> > resume.it
>> >>> > just
>> >>> > shows"opening nondet log for write:.****.log"
>> >>> > Thanks for checking!
>> >>> > Any suggestions?
>> >>> > Thanks a lot!
>> >>> > --
>> >>> > wait and hope~~
>> >>> >
>> >>> > _______________________________________________
>> >>> > panda-users mailing list
>> >>> > panda-users at mit.edu
>> >>> > http://mailman.mit.edu/mailman/listinfo/panda-users
>> >>> >
>> >>
>> >>
>> >>
>> >>
>> >> --
>> >> wait and hope~~
>> >
>> >
>> >
>> >
>> > --
>> > wait and hope~~
>> >
>> >
>> >
>> > --
>> > wait and hope~~
>> >
>> > _______________________________________________
>> > panda-users mailing list
>> > panda-users at mit.edu
>> > http://mailman.mit.edu/mailman/listinfo/panda-users
>> >
>
>
>
>
> --
> wait and hope~~