Re: [Qemu-devel] [PATCH 0/2] Make simpletrace work on Windows

[Zhi Yong Wu]

On Tue, Sep 20, 2011 at 5:57 PM, Stefan Hajnoczi
<address@hidden> wrote:
> On Tue, Sep 20, 2011 at 05:05:45PM +0800, hkran wrote:
>> On 09/09/2011 05:37 PM, Stefan Hajnoczi wrote:
>> >The 'simple' trace backend uses pthreads and does not work on Windows.  
>> >These
>> >patches switch from pthreads to glib so that the code builds on all 
>> >platforms
>> >supported by glib.
>> >
>> >Only one thing I'm unhappy about: the simpletrace write-out thread used to
>> >block all signals.  I have removed that code and don't expect glib to do it 
>> >for
>> >me.  I'm not sure if there is a problem if signal handlers are invoked in 
>> >the
>> >write-out thread instead of a QEMU thread.  Any thoughts?
>> >
>> >Stefan Hajnoczi (2):
>> >   trace: portable simple trace backend using glib
>> >   trace: use binary file open mode in simpletrace
>> >
>> >  trace/simple.c |   58 
>> > ++++++++++++++++++++++++++-----------------------------
>> >  1 files changed, 27 insertions(+), 31 deletions(-)
>> >
>> Stefan,
>>
>> I applied the patch and make &install it.
>>
>> After a round of running of the qemu with the patch, a trace file is
>> here, but when I want to open it like this,
>> ./simpletrace.py trace-events trace-29948    //trace-29948 is my tracefile
>>  an error occurs:
>>
>> Traceback (most recent call last):
>>   File "./simpletrace.py", line 151, in <module>
>>     run(Formatter())
>>   File "./simpletrace.py", line 131, in run
>>     events = parse_events(open(sys.argv[1], 'r'))
>> IOError: [Errno 2] No such file or directory: 'trace-events'
>>
>> Am I using it in a right way?
>
> Looks like your current working directory is scripts/ so simpletrace.py
> will be unable to find the trace-events file which is in the parent
> directory.
>
> Usually I stay in QEMU's root directory and just run:
> $ qemu # ...generate the trace
> $ scripts/simpletrace.py trace-events trace-$PID
I know how to define my own event and play with it now. Very helpful
for me to debug my functions. thanks.

>
>> Additionally, There is something about WIN32 in patch, How can I
>> compile a qemu running on windows? Could you give a reference?
>
> Search for 'mingw' in qemu-doc.texi for instructions.
>
> Stefan
>
>



-- 
Regards,

Zhi Yong Wu