[New-bugs-announce] [issue14331] Python/import.c uses a lot of
stack space due to MAXPATHLEN  Gregory P. Smith report at
bugs.python.org Fri Mar 16 01:42:29 CET 2012  New submission
from Gregory P. Smith <greg at krypto.org>:  Python/import.c in
2.7 and 3.2 consume a lot of stack space when importing modules.
In stack constrained environments (think: 64k stack) this can
cause a crash when you have a large chain of imports.  The bulk
of this likely comes from places where a char buf[MAXPATHLEN+1]
or similar is declared on the stack in the call chain.
MAXPATHLEN is commonly defined to be in the 256..1024 range
depending on the OS.  Changing the code to not put the large
buffer on the stack but to malloc and free it instead is a
pretty straightforward re-factor.  import is being significantly
reworked in 3.3 so I won't consider this issue there until after
that settles as it may no longer apply.  assignee:
gregory.p.smith messages: 155981 nosy: brett.cannon,
gregory.p.smith, ncoghlan, twouters priority: normal