[ python-Bugs-1144263 ] reload() is broken for C extension objects
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Sat Feb 19 22:37:31 CET 2005
Bugs item #1144263, was opened at 2005-02-19 04:20
Message generated for change (Comment added) made by knepley
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Category: Python Interpreter Core
Group: Python 2.4
Status: Open
Resolution: None
Priority: 5
Submitted By: Matthew G. Knepley (knepley)
Assigned to: Nobody/Anonymous (nobody)
Summary: reload() is broken for C extension objects
Initial Comment:
1) A C extension module (foo.so) is imported
import foo
2) The library foo.so is rebuilt with changes
3) We reload the module
foo = reload(foo)
The reload() method calls imp.load_dynamic() which
eventually gets down to _PyImport_GetDynLoadFunc().
This just calls dlopen(), which returns the old filehandle.
This problem can be fixed by augmenting imp with
unload_dynamic(), which could easily be implemented in
a _PyImport_GetDynUnloadFunc(), which would just
consult its handles[] array, and call dlclose() on the
appropriate handle. This will work if Python was the
only program to dlopen() foo.so.
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>Comment By: Matthew G. Knepley (knepley)
Date: 2005-02-19 16:37
Message:
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I am only interested in fixing it for the dlopen() case,
which I thnk subsumes every architecture likely to have this
problem appear. I have no problem fixing it myself, but I
need to get all the CVS stuff setup. And I am not sure how
to easily generate the patch to send (I'm used to BK).
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Comment By: Michael Hudson (mwh)
Date: 2005-02-19 16:27
Message:
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I don't believe this is quite as easy as you make out. It might be
possible to make something that works for platforms that use dlopen
though...
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