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Crash when modifying DLL function pointers conconcurrently #127946
Description
It seems that ctypes doesn't like having function pointers on a CDLL modified concurrently. Here's a reproducer (for Linux):
import ctypes
from threading import Thread
dll = ctypes.CDLL("libc.so.6")
def main():
for _ in range(100):
dll.puts.argtypes = ctypes.c_char_p,
dll.puts.restype = ctypes.c_int
threads = [Thread(target=main) for _ in range(100)]
for thread in threads:
thread.start()
Activity
[-]Crash when modifying DLL function pointers conconcurrently (report incoming)[/-][+]Crash when modifying DLL function pointers conconcurrently[/+]ZeroIntensity commentedon Dec 14, 2024
PR ready, but waiting on #127950.
gh-127946: Use a critical section for `CFuncPtr` attributes (GH-128109)
pythongh-127946: Use a critical section for `CFuncPtr` attributes (py…
pythongh-127946: Use a critical section for `CFuncPtr` attributes (py…