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GH-91079: Implement C stack limits using addresses, not counters. (GH-130007)

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* Implement C recursion protection with limit pointers

* Remove calls to PyOS_CheckStack

* Add stack protection to parser

* Make tests more robust to low stacks

* Improve error messages for stack overflow
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Mark Shannon 2025-02-19 11:44:57 +00:00 • committed by GitHub
parent c637bce20a
commit 2498c22fa0
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47 changed files with 1217 additions and 1463 deletions
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11
Python/pystate.c
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@ -1490,10 +1490,9 @@ init_threadstate(_PyThreadStateImpl *_tstate,
// thread_id and native_thread_id are set in bind_tstate().
tstate->py_recursion_limit = interp->ceval.recursion_limit,
tstate->py_recursion_remaining = interp->ceval.recursion_limit,
tstate->c_recursion_remaining = Py_C_RECURSION_LIMIT;
tstate->py_recursion_limit = interp->ceval.recursion_limit;
tstate->py_recursion_remaining = interp->ceval.recursion_limit;
tstate->c_recursion_remaining = 2;
tstate->exc_info = &tstate->exc_state;
// PyGILState_Release must not try to delete this thread state.
@ -1508,6 +1507,10 @@ init_threadstate(_PyThreadStateImpl *_tstate,
tstate->previous_executor = NULL;
tstate->dict_global_version = 0;
_tstate->c_stack_soft_limit = UINTPTR_MAX;
_tstate->c_stack_top = 0;
_tstate->c_stack_hard_limit = 0;
_tstate->asyncio_running_loop = NULL;
_tstate->asyncio_running_task = NULL;