[Python-Dev] Internal counter to debug leaking file descriptors (original) (raw)

exarkun at twistedmatrix.com exarkun at twistedmatrix.com
Tue Aug 31 19:40:31 CEST 2010

On 05:22 pm, glyph at twistedmatrix.com wrote:

On Aug 31, 2010, at 10:03 AM, Guido van Rossum wrote: On Linux you can look somewhere in /proc, but I don't know that it would help you find where a file was opened. "/dev/fd" is actually a somewhat portable way of getting this information. I don't think it's part of a standard, but on Linux it's usually a symlink to "/proc/self/fd", and it's available on MacOS and most BSDs (based on a hasty and completely-not-comprehensive investigation). But it won't help you find out when the FDs were originally opened, no.

On OS X and Solaris, dtrace and ustack will tell you exactly when and where the FDs were originally opened, though. On Linux, SystemTap might give you the same information (but I know much less about SystemTap). If http://bugs.python.org/issue4111 is resolved, then this may even be possible without using a patched version of Python.

Jean-Paul

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