If you wanted to do something like this in the Python stdlib, you'd have to monkey-patch (with a proxy/wrapper) all places that can open or close a filedescriptor -- os.open, os.popen, os.close, file open/close, socket open/close, and probably a bunch more that I've forgotten. Also some extension modules may open file descriptors directly through the C interfaces.
I don't know if the Windows libc has some kind of tracking feature for file descriptors; of course it complicates things by using separate (numeric) namespaces for sockets and files. On Linux you can look somewhere in /proc, but I don't know that it would help you find where a file was opened. --Guido On Mon, Aug 30, 2010 at 11:49 PM, anatoly techtonik <techto...@gmail.com> wrote: > Hi, > > Is there any kind of internal file descriptor counter that can be > queried to debug issues with leaking resources? > It can be used in tests to check that all tests are finish with 0 > opened descriptors. > It will be very useful while porting Python applications from Unix to > Windows. Unix is more tolerant to open files and can overwrite them > and do other nasty things. See the thread from comment #17 - > https://bugs.edge.launchpad.net/dulwich/+bug/557585/ - there is an > example of mmap that starts holding file descriptor somewhere long > before an error occurs. How could one debug this? > > Right now I have to use FileMon. It includes information about > operated filenames, but no info about source code where this happens. > It will be nice to have some kind of counter with filename information > inside Python, so that it can be possible to get the full log of > events without manually messing with external system-specific tools > like FileMon. > > -- > anatoly t. > _______________________________________________ > Python-Dev mailing list > Python-Dev@python.org > http://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: > http://mail.python.org/mailman/options/python-dev/guido%40python.org > -- --Guido van Rossum (python.org/~guido) _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
