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bpo-23689: re module, fix memory leak when a match is terminated by a signal or memory allocation failure #32283

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Merged
serhiy-storchaka merged 11 commits into from Apr 3, 2022
Merged

bpo-23689: re module, fix memory leak when a match is terminated by a signal or memory allocation failure #32283

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e5317fe
1. add variables
wjssz Apr 3, 2022
28e4d2d
2. add _CompileData class to _compile.py
wjssz Apr 3, 2022
7493fad
3. add repeat_count parameter to _sre.compile() function
wjssz Apr 3, 2022
b928335
4. emit repeat_count in sre_compile.py
wjssz Apr 3, 2022
dfec05d
5. change _validate_outer() parameter
wjssz Apr 3, 2022
db7e88b
6. validate in _validate_inner() / _validate_outer()
wjssz Apr 3, 2022
a43cb6e
7. allocate repeats_array for SRE_STATE
wjssz Apr 3, 2022
1560a0c
8. support code in sre_lib.h
wjssz Apr 3, 2022
96be025
9. add unit-tests
wjssz Apr 3, 2022
7ee3e66
a. skip -= field_number
wjssz Apr 3, 2022
e95b19f
b. improve unit-test
wjssz Apr 3, 2022
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9. add unit-tests
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@wjssz
wjssz committed Apr 3, 2022
commit 96be0259a7c512c20f14e7fb8234fc7931fdb526
24 changes: 24 additions & 0 deletions Lib/test/test_re.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1646,6 +1646,9 @@ def test_dealloc(self):
_sre.compile("abc", 0, [long_overflow], 0, {}, (), 0)
with self.assertRaises(TypeError):
_sre.compile({}, 0, [], 0, [], [], 0)
with self.assertRaises(RuntimeError):
# invalid repeat_count -1
_sre.compile("abc", 0, [1], 0, {}, (), -1)

def test_search_dot_unicode(self):
self.assertTrue(re.search("123.*-", '123abc-'))
Expand Down Expand Up @@ -2334,6 +2337,27 @@ def test_possesive_repeat(self):
14. SUCCESS
''')

def test_repeat_index(self):
self.assertEqual(get_debug_out(r'(?:ab)*(?:cd)*'), '''\
MAX_REPEAT 0 MAXREPEAT
LITERAL 97
LITERAL 98
MAX_REPEAT 0 MAXREPEAT
LITERAL 99
LITERAL 100

0. INFO 4 0b0 0 MAXREPEAT (to 5)
5: REPEAT 8 0 MAXREPEAT 0 (to 14)
10. LITERAL 0x61 ('a')
12. LITERAL 0x62 ('b')
14: MAX_UNTIL
15. REPEAT 8 0 MAXREPEAT 1 (to 24)
20. LITERAL 0x63 ('c')
22. LITERAL 0x64 ('d')
24: MAX_UNTIL
25. SUCCESS
''')


class PatternReprTests(unittest.TestCase):
def check(self, pattern, expected):
Expand Down