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GH-91079: Revert "GH-91079: Implement C stack limits using addresses, not counters. (GH-130007)" for now (GH130413)

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

Unfortunatlely, the change broke some buildbots.

This reverts commit 2498c22fa0.
This commit is contained in:
Petr Viktorin 2025-02-24 11:16:08 +01:00 • committed by GitHub
parent 0ff1611574
commit ef29104f7d
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GPG key ID: B5690EEEBB952194
47 changed files with 1466 additions and 1220 deletions
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27
Python/pythonrun.c
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@ -1528,8 +1528,12 @@ _Py_SourceAsString(PyObject *cmd, const char *funcname, const char *what, PyComp
}
#if defined(USE_STACKCHECK)
#if defined(WIN32) && defined(_MSC_VER)
/* Stack checking */
/* Stack checking for Microsoft C */
#include <malloc.h>
#include <excpt.h>
/*
* Return non-zero when we run out of memory on the stack; zero otherwise.
@ -1537,10 +1541,27 @@ _Py_SourceAsString(PyObject *cmd, const char *funcname, const char *what, PyComp
int
PyOS_CheckStack(void)
{
PyThreadState *tstate = _PyThreadState_GET();
return _Py_ReachedRecursionLimit(tstate);
__try {
/* alloca throws a stack overflow exception if there's
not enough space left on the stack */
alloca(PYOS_STACK_MARGIN * sizeof(void*));
return 0;
} __except (GetExceptionCode() == STATUS_STACK_OVERFLOW ?
EXCEPTION_EXECUTE_HANDLER :
EXCEPTION_CONTINUE_SEARCH) {
int errcode = _resetstkoflw();
if (errcode == 0)
{
Py_FatalError("Could not reset the stack!");
}
}
return 1;
}
#endif /* WIN32 && _MSC_VER */
/* Alternate implementations can be added here... */
#endif /* USE_STACKCHECK */
/* Deprecated C API functions still provided for binary compatibility */