8000 BUG: disable garbage collector during memory allocation hook by juliantaylor · Pull Request #4841 · numpy/numpy · GitHub
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BUG: disable garbage collector during memory allocation hook #4841

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Merged
merged 1 commit into from
Jul 5, 2014
Merged

BUG: disable garbage collector during memory allocation hook #4841

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10 changes: 10 additions & 0 deletions tools/allocation_tracking/track_allocations.py
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
from __future__ import division, absolute_import, print_function

import numpy as np
import gc
import inspect
from alloc_hook import NumpyAllocHook

Expand Down Expand Up @@ -35,12 +36,21 @@ def __exit__(self, type, value, traceback):
self.numpy_hook.__exit__()

def hook(self, inptr, outptr, size):
# minimize the chances that the garbage collector kicks in during a
# cython __dealloc__ call and causes a double delete of the current
# object. To avoid this fully the hook would have to avoid all python
# api calls, e.g. by being implemented in C like python 3.4's
# tracemalloc module
gc_on = gc.isenabled()
gc.disable()
if outptr == 0: # it's a free
self.free_cb(inptr)
elif inptr != 0: # realloc
self.realloc_cb(inptr, outptr, size)
else: # malloc
self.alloc_cb(outptr, size)
if gc_on:
gc.enable()

def alloc_cb(self, ptr, size):
if size >= self.threshold:
Expand Down
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