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gh-59705: Implement _thread.set_name() on Windows (#128675)

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Implement set_name() with SetThreadDescription() and _get_name() with
GetThreadDescription(). If SetThreadDescription() or
GetThreadDescription() is not available in kernelbase.dll, delete the
method when the _thread module is imported.

Truncate the thread name to 32766 characters.

Co-authored-by: Eryk Sun <eryksun@gmail.com>
This commit is contained in:
Victor Stinner 2025-01-17 14:55:43 +01:00 • committed by GitHub
parent 76856ae165
commit d7f703d54d
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4 changed files with 123 additions and 15 deletions
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41
Lib/test/test_threading.py
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@ -2130,6 +2130,15 @@ def test_set_name(self):
# Test long non-ASCII name (truncated)
"x" * (limit - 1) + "é€",
# Test long non-BMP names (truncated) creating surrogate pairs
# on Windows
"x" * (limit - 1) + "\U0010FFFF",
"x" * (limit - 2) + "\U0010FFFF" * 2,
"x" + "\U0001f40d" * limit,
"xx" + "\U0001f40d" * limit,
"xxx" + "\U0001f40d" * limit,
"xxxx" + "\U0001f40d" * limit,
]
if os_helper.FS_NONASCII:
tests.append(f"nonascii:{os_helper.FS_NONASCII}")
@ -2146,15 +2155,31 @@ def work():
work_name = _thread._get_name()
for name in tests:
encoded = name.encode(encoding, "replace")
if b'\0' in encoded:
encoded = encoded.split(b'\0', 1)[0]
if truncate is not None:
encoded = encoded[:truncate]
if sys.platform.startswith("solaris"):
expected = encoded.decode("utf-8", "surrogateescape")
if not support.MS_WINDOWS:
encoded = name.encode(encoding, "replace")
if b'\0' in encoded:
encoded = encoded.split(b'\0', 1)[0]
if truncate is not None:
encoded = encoded[:truncate]
if sys.platform.startswith("solaris"):
expected = encoded.decode("utf-8", "surrogateescape")
else:
expected = os.fsdecode(encoded)
else:
expected = os.fsdecode(encoded)
size = 0
chars = []
for ch in name:
if ord(ch) > 0xFFFF:
size += 2
else:
size += 1
if size > truncate:
break
chars.append(ch)
expected = ''.join(chars)
if '\0' in expected:
expected = expected.split('\0', 1)[0]
with self.subTest(name=name, expected=expected):
work_name = None