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[3.14] gh-140067: Fix memory leak in sub-interpreter creation (GH-140111) (#140118)

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* [3.14] gh-140067: Fix memory leak in sub-interpreter creation  (GH-140111)

Fix memory leak in sub-interpreter creation caused by overwriting of the previously used `_malloced` field. Now the pointer is stored in the first word of the memory block to avoid it being overwritten accidentally.
(cherry picked from commit 59547a251f)

Co-authored-by: Shamil <ashm.tech@proton.me>
Co-authored-by: Kumar Aditya <kumaraditya@python.org>
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Kumar Aditya 2025-10-18 19:40:43 +05:30 • committed by GitHub
parent 3ca7ea1f8f
commit 1d11627ba5
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4 changed files with 12 additions and 10 deletions
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Lib/test/test_threading.py
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@ -1727,6 +1727,7 @@ def task():
self.assertEqual(os.read(r_interp, 1), DONE)
@cpython_only
@support.skip_if_sanitizer(thread=True, memory=True)
def test_daemon_threads_fatal_error(self):
import_module("_testcapi")
subinterp_code = f"""if 1: