pyobjc-dev

[Pyobjc-dev] instrumentObjcMessageSends

[Jon C. <jon...@gm...>]

Many apologies if this is the wrong place to ask this question, but I
couldn't find anywhere else.

I'd like to call the instrumentObjcMessageSends(YES)  function which
is part of the objc runtime so that I can log all objc-messages, but I
can't figure out how to access it from python.
This function has the same effect as NSObjCMessageLoggingEnabled=TRUE
(see http://developer.apple.com/technotes/tn2004/tn2124.html)

I can create and call objc classes, but instrumentObjcMessageSends is
a free function.  I'd appreciate any pointers as to how to call this
function, or runtime free functions in general, for that matter.

Thanks,
Jon

BTW, the all the links from the sourceforge examples page
http://pyobjc.sourceforge.net/examples/index.php are broken.

Re: [Pyobjc-dev] instrumentObjcMessageSends

[Ronald O. <ron...@ma...>]

On 6 Jan, 2008, at 21:21, Jon Christopher wrote:

> Many apologies if this is the wrong place to ask this question, but I
> couldn't find anywhere else.
>
> I'd like to call the instrumentObjcMessageSends(YES)  function which
> is part of the objc runtime so that I can log all objc-messages, but I
> can't figure out how to access it from python.
> This function has the same effect as NSObjCMessageLoggingEnabled=TRUE
> (see http://developer.apple.com/technotes/tn2004/tn2124.html)
>
> I can create and call objc classes, but instrumentObjcMessageSends is
> a free function.  I'd appreciate any pointers as to how to call this
> function, or runtime free functions in general, for that matter.

You cannot easily call runtime functions.  Because  
instrumentObjcMessageSends isn't a public API I won't add it to PyObjC.

It should be possible to call it using objc.loadBundleFunctions, but I  
don't have time to look into that right now.

Ronald
>
>
> Thanks,
> Jon
>
> BTW, the all the links from the sourceforge examples page
> http://pyobjc.sourceforge.net/examples/index.php are broken.
>
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Re: [Pyobjc-dev] instrumentObjcMessageSends

[Michael M. <mic...@gm...>]

On Jan 6, 2008 11:10 PM, Ronald Oussoren <ron...@ma...> wrote:
>
> On 6 Jan, 2008, at 21:21, Jon Christopher wrote:
>
> > Many apologies if this is the wrong place to ask this question, but I
> > couldn't find anywhere else.
> >
> > I'd like to call the instrumentObjcMessageSends(YES)  function which
> > is part of the objc runtime so that I can log all objc-messages, but I
> > can't figure out how to access it from python.
> > This function has the same effect as NSObjCMessageLoggingEnabled=TRUE
> > (see http://developer.apple.com/technotes/tn2004/tn2124.html)
> >
> > I can create and call objc classes, but instrumentObjcMessageSends is
> > a free function.  I'd appreciate any pointers as to how to call this
> > function, or runtime free functions in general, for that matter.
>
> You cannot easily call runtime functions.  Because
> instrumentObjcMessageSends isn't a public API I won't add it to PyObjC.
>
> It should be possible to call it using objc.loadBundleFunctions, but I
> don't have time to look into that right now.
>

Wouldn't it be possible to just wrap that function with a C extension module?

Or if you really want every message send, just add it to your main.m?

-mike

(PS, sorry Ronald for the accidental double-reply.)

-- 
Michael McCracken
UCSD CSE PhD Candidate
research: http://www.cse.ucsd.edu/~mmccrack/
misc: http://michael-mccracken.net/wp/

Re: [Pyobjc-dev] instrumentObjcMessageSends

[Ronald O. <ron...@ma...>]

On 8 Jan, 2008, at 0:09, Michael McCracken wrote:

> On Jan 6, 2008 11:10 PM, Ronald Oussoren <ron...@ma...>  
> wrote:
>>
>> On 6 Jan, 2008, at 21:21, Jon Christopher wrote:
>>
>>> Many apologies if this is the wrong place to ask this question,  
>>> but I
>>> couldn't find anywhere else.
>>>
>>> I'd like to call the instrumentObjcMessageSends(YES)  function which
>>> is part of the objc runtime so that I can log all objc-messages,  
>>> but I
>>> can't figure out how to access it from python.
>>> This function has the same effect as  
>>> NSObjCMessageLoggingEnabled=TRUE
>>> (see http://developer.apple.com/technotes/tn2004/tn2124.html)
>>>
>>> I can create and call objc classes, but instrumentObjcMessageSends  
>>> is
>>> a free function.  I'd appreciate any pointers as to how to call this
>>> function, or runtime free functions in general, for that matter.
>>
>> You cannot easily call runtime functions.  Because
>> instrumentObjcMessageSends isn't a public API I won't add it to  
>> PyObjC.
>>
>> It should be possible to call it using objc.loadBundleFunctions,  
>> but I
>> don't have time to look into that right now.
>>
>
> Wouldn't it be possible to just wrap that function with a C  
> extension module?
>
> Or if you really want every message send, just add it to your main.m?

That's also possible. This should do the trick for calling it in pure  
python:

import objc
import Foundation

objc.loadBundleFunctions(Foundation.__bundle__, globals(),
         [
             ('instrumentObjcMessageSends', objc._C_VOID +  
objc._C_NSBOOL),
         ])

Then use 'instrumentObjcMessageSends(1)' to enable logging. This  
assumes the prototype for the function is 'void  
instrumentObjcMessageSends(BOOL)'.

I've tried this without getting a possitive result though. According  
to <http://lists.apple.com/archives/darwin-dev/2005/Jul/msg00027.html>  
you have to call another function as well, which has a callback  
function to perform the actual logging.

I guess it would be easier to just implement this is a small C  
extension after all.

Ronald