[3.14] GH-139653: Only raise an exception (or fatal error) when the stack pointer is about to overflow the stack. (GH-141711) by hroncok · Pull Request #141892 · python/cpython

rokm

and others added 4 commits

November 24, 2025 11:32

… limit on macOS (pythonGH-139232)

Use `pthread_get_stackaddr_np()` and `pthread_get_stacksize_np()` to determine the stack address and size.

(cherry picked from commit 7016044)

…hon#139668)

Add PyUnstable_ThreadState_SetStackProtection() and
PyUnstable_ThreadState_ResetStackProtection() functions
to set the stack base address and stack size of a Python
thread state.

Co-authored-by: Petr Viktorin <encukou@gmail.com>
(cherry picked from commit b99db92)

…ack pointer is about to overflow the stack. (pythonGH-141711)

Only raises if the stack pointer is both below the limit *and* above the stack base.
This prevents false positives for user-space threads, as the stack pointer will be outside those bounds
if the stack has been swapped.

(cherry picked from commit c25a070)

This was referenced

Nov 24, 2025