8000 gh-60115: Support frozen modules for linecache.getline() by gaogaotiantian · Pull Request #131638 · python/cpython · GitHub
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gh-60115: Support frozen modules for linecache.getline() #131638

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Merged
merged 7 commits into from
Apr 2, 2025
Merged

gh-60115: Support frozen modules for linecache.getline() #131638

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7bbf5d6
Support getting source file for frozen modules
gaogaotiantian Mar 23, 2025
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📜🤖 Added by blurb_it.
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Update 2025-03-23-18-39-07.gh-issue-60115.AWdcmq.rst
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Support getting source file for frozen modules
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@gaogaotiantian
gaogaotiantian committed Mar 23, 2025
commit 7bbf5d6b69fb8ee577287242067d8c8b41000c29
21 changes: 19 additions & 2 deletions Lib/linecache.py
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Original file line number Diff line number Diff line change
Expand Up @@ -63,6 +63,16 @@ def _getlines_from_code(code):
return []


def _source_unavailable(filename):
"""Return True if the source code is unavailable for such file name"""
return (
not filename
or (filename.startswith('<')
and filename.endswith('>')
and not filename.startswith('<frozen '))
)


def checkcache(filename=None):
"""Discard cache entries that are out of date.
(This is not checked upon each call!)"""
Expand Down Expand Up @@ -118,10 +128,17 @@ def updatecache(filename, module_globals=None):
if filename in cache:
if len(cache[filename]) != 1:
cache.pop(filename, None)
if not filename or (filename.startswith('<') and filename.endswith('>')):
if _source_unavailable(filename):
return []

fullname = filename
if filename.startswith('<frozen ') and module_globals is not None:
# This is a frozen module, so we need to use the filename
# from the module globals.
fullname = module_globals.get('__file__', None)
if fullname is None:
return []
else:
fullname = filename
try:
stat = os.stat(fullname)
except OSError:
Expand Down
13 changes: 13 additions & 0 deletions Lib/test/test_linecache.py
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Expand Up @@ -281,6 +281,19 @@ def test_loader(self):
self.assertEqual(linecache.getlines(filename, module_globals),
['source for x.y.z\n'])

def test_frozen(self):
filename = '<frozen fakemodule>'
module_globals = {'__file__': FILENAME}
empty = linecache.getlines(filename)
self.assertEqual(empty, [])
lines = linecache.getlines(filename, module_globals)
self.assertGreater(len(lines), 0)
lines_cached = linecache.getlines(filename)
self.assertEqual(lines, lines_cached)
linecache.clearcache()
empty = linecache.getlines(filename)
self.assertEqual(empty, [])

def test_invalid_names(self):
for name, desc in [
('\x00', 'NUL bytes filename'),
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