[Python-Dev] Internal counter to debug leaking file descriptors (original) (raw)
anatoly techtonik techtonik at gmail.com
Tue Aug 31 08:49:41 CEST 2010
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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.
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