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Issue #16743: Fix mmap overflow check on 32 bit Windows

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Richard Oudkerk 2013-02-13 12:18:03 +00:00
parent 7e0191170e
commit 0d09ba8e0b
2 changed files with 18 additions and 11 deletions
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7
Lib/test/test_mmap.py
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@ -693,6 +693,13 @@ class LargeMmapTests(unittest.TestCase):
def test_large_filesize(self):
with self._make_test_file(0x17FFFFFFF, b" ") as f:
if sys.maxsize < 0x180000000:
# On 32 bit platforms the file is larger than sys.maxsize so
# mapping the whole file should fail -- Issue #16743
with self.assertRaises(OverflowError):
mmap.mmap(f.fileno(), 0x180000000, access=mmap.ACCESS_READ)
with self.assertRaises(ValueError):
mmap.mmap(f.fileno(), 0, access=mmap.ACCESS_READ)
with mmap.mmap(f.fileno(), 0x10000, access=mmap.ACCESS_READ) as m:
self.assertEqual(m.size(), 0x180000000)