Re: [Pyobjc-dev] using objc.inject

[James R E. <Jam...@lr...>]

Hi Dan,

I actually use objc.inject for a few projects, and it's a great  
debugging tool.  I believe that your problem looks more like a bug in  
the InjectInterpreter code rather than in the lower-level objc.inject  
code (which works great!).  In particular, try changing line 365 of  
InjectInterpreterPlugin.py from NSAnyEventMask to NSUIntegerMax.

Logically, the use of NSAnyEventMask is correct in the above code.  On  
the PyObjC side, however, it's a signed integer (at least in the  
PyObjC that comes with Leopard) instead of an unsigned integer.   
That's why NSUIntegerMax is functionally correct (even if logically  
incorrect) here.  As for why NSAnyEventMask is signed instead of  
unsigned, that might be a bug in PyObjC.  Maybe.

 >>> NSUIntegerMax
4294967295L
 >>> NSAnyEventMask
-1
 >>> struct.unpack('L', struct.pack('l', NSAnyEventMask))[0] # cast to  
unsigned
4294967295L

Cheers!
James

Le 29 juil. 09 à 18:18, Daniel Ashbrook a écrit :

> Re: "does anyone use objc.inject" from a few months ago, I think I
> would like to. I'm hoping to get at the internals of a program and
> extract some hard-to-get-at information. However, trying the
> InjectInterpreter example code doesn't seem to work, so any hints
> would be appreciated. Doing:
>
>   sudo python test.py 71755
>
> (where 7155 is the pid of TextEdit) returns without comment, but
> prints to the system log:
>
> TextEdit[71755]: InjectInterpreterPlugin has encountered a fatal
> error, and will now terminate.
> TextEdit[71755]: An uncaught exception was raised during execution of
> the main script:^M^MSystemError: NULL result without error in
> PyObject_Call^M^MThis may mean that an unexpected error has occurred,
> or that you do not have all of the dependencies for this bundle.
> [0x0-0x48d48d].com.apple.TextEdit[71755]: Traceback (most recent call
> last):
> [0x0-0x48d48d].com.apple.TextEdit[71755]:   File "/tmp/
> InjectInterpreter/dist/InjectInterpreterPlugin.plugin/Contents/
> Resources/__boot__.py", line 23, in <module>
> [0x0-0x48d48d].com.apple.TextEdit[71755]:
> _run('InjectInterpreterPlugin.py')
> [0x0-0x48d48d].com.apple.TextEdit[71755]:   File "/tmp/
> InjectInterpreter/dist/InjectInterpreterPlugin.plugin/Contents/
> Resources/__boot__.py", line 20, in _run
> [0x0-0x48d48d].com.apple.TextEdit[71755]:     execfile(path,
> globals(), globals())
> [0x0-0x48d48d].com.apple.TextEdit[71755]:   File "/tmp/
> InjectInterpreter/dist/InjectInterpreterPlugin.plugin/Contents/
> Resources/InjectInterpreterPlugin.py", line 187, in <module>
> [0x0-0x48d48d].com.apple.TextEdit[71755]:     class
> PyInterpreter(NSTextView):
> [0x0-0x48d48d].com.apple.TextEdit[71755]: SystemError: NULL result
> without error in PyObject_Call
>
> Any hints?
>
> Thanks,
>
>
> dan
>
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