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bpo-31217: Fix regrtest -R for small integer (#3260) (#3261)

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Use a pool of integer objects toprevent false alarm when checking for
memory block leaks. Fill the pool with values in -1000..1000 which
are the most common (reference, memory block, file descriptor)
differences.

Co-Authored-By: Antoine Pitrou <pitrou@free.fr>
(cherry picked from commit 6c2feabc5d)
This commit is contained in:
Victor Stinner 2017-09-01 15:04:47 +02:00 • committed by GitHub
parent 60f3f1fb5c
commit 98c849a2f3
1 changed files with 11 additions and 3 deletions
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14
Lib/test/libregrtest/refleak.py
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@ -68,6 +68,14 @@ def dash_R(the_module, test, indirect_test, huntrleaks):
for obj in abc.__subclasses__() + [abc]: for obj in abc.__subclasses__() + [abc]:
abcs[obj] = obj._abc_registry.copy() abcs[obj] = obj._abc_registry.copy()
# bpo-31217: Integer pool to get a single integer object for the same
# value. The pool is used to prevent false alarm when checking for memory
# block leaks. Fill the pool with values in -1000..1000 which are the most
# common (reference, memory block, file descriptor) differences.
int_pool = {value: value for value in range(-1000, 1000)}
def get_pooled_int(value):
return int_pool.setdefault(value, value)
nwarmup, ntracked, fname = huntrleaks nwarmup, ntracked, fname = huntrleaks
fname = os.path.join(support.SAVEDCWD, fname) fname = os.path.join(support.SAVEDCWD, fname)
repcount = nwarmup + ntracked repcount = nwarmup + ntracked
@ -86,9 +94,9 @@ def dash_R(the_module, test, indirect_test, huntrleaks):
abcs) abcs)
print('.', end='', file=sys.stderr, flush=True) print('.', end='', file=sys.stderr, flush=True)
if i >= nwarmup: if i >= nwarmup:
rc_deltas[i] = rc_after - rc_before rc_deltas[i] = get_pooled_int(rc_after - rc_before)
alloc_deltas[i] = alloc_after - alloc_before alloc_deltas[i] = get_pooled_int(alloc_after - alloc_before)
fd_deltas[i] = fd_after - fd_before fd_deltas[i] = get_pooled_int(fd_after - fd_before)
alloc_before = alloc_after alloc_before = alloc_after
rc_before = rc_after rc_before = rc_after
fd_before = fd_after fd_before = fd_after