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GH-130396: Use computed stack limits on linux (GH-130398)

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* Implement C recursion protection with limit pointers for Linux, MacOS and Windows

* 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 2025-02-25 09:24:48 +00:00 • committed by GitHub
parent 99088ab081
commit 014223649c
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58 changed files with 1295 additions and 1482 deletions
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23
Include/pythonrun.h
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@ -21,14 +21,23 @@ PyAPI_FUNC(void) PyErr_DisplayException(PyObject *);
/* Stuff with no proper home (yet) */
PyAPI_DATA(int) (*PyOS_InputHook)(void);
/* Stack size, in "pointers" (so we get extra safety margins
on 64-bit platforms). On a 32-bit platform, this translates
to an 8k margin. */
#define PYOS_STACK_MARGIN 2048
/* Stack size, in "pointers". This must be large enough, so
* no two calls to check recursion depth are more than this far
* apart. In practice, that means it must be larger than the C
* stack consumption of PyEval_EvalDefault */
#if defined(_Py_ADDRESS_SANITIZER) || defined(_Py_THREAD_SANITIZER)
# define PYOS_STACK_MARGIN 4096
#elif defined(Py_DEBUG) && defined(WIN32)
# define PYOS_STACK_MARGIN 3072
#elif defined(__wasi__)
/* Web assembly has two stacks, so this isn't really a size */
# define PYOS_STACK_MARGIN 500
#else
# define PYOS_STACK_MARGIN 2048
#endif
#define PYOS_STACK_MARGIN_BYTES (PYOS_STACK_MARGIN * sizeof(void *))
#if defined(WIN32) && !defined(MS_WIN64) && !defined(_M_ARM) && defined(_MSC_VER) && _MSC_VER >= 1300
/* Enable stack checking under Microsoft C */
// When changing the platforms, ensure PyOS_CheckStack() docs are still correct
#if defined(WIN32)
#define USE_STACKCHECK
#endif