From 0d09ba8e0bc57b50984d1968aab3c29de3e1320d Mon Sep 17 00:00:00 2001 From: Richard Oudkerk Date: Wed, 13 Feb 2013 12:18:03 +0000 Subject: Issue #16743: Fix mmap overflow check on 32 bit Windows --- Lib/test/test_mmap.py | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'Lib/test/test_mmap.py') diff --git a/Lib/test/test_mmap.py b/Lib/test/test_mmap.py index 28b52a98e6..4407c5cfc9 100644 --- a/Lib/test/test_mmap.py +++ b/Lib/test/test_mmap.py @@ -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) -- cgit v1.2.1