mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-07-07 19:35:27 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

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

Browse source 
* 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
This commit is contained in:
Mark Shannon 2025-02-19 11:44:57 +00:00 • committed by GitHub
parent c637bce20a
commit 2498c22fa0
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
47 changed files with 1217 additions and 1463 deletions
Download patch file Download diff file Expand all files Collapse all files

27
Python/pythonrun.c
View file

@ -1528,12 +1528,8 @@ _Py_SourceAsString(PyObject *cmd, const char *funcname, const char *what, PyComp
}
#if defined(USE_STACKCHECK)
#if defined(WIN32) && defined(_MSC_VER)
/* Stack checking for Microsoft C */
#include <malloc.h>
#include <excpt.h>
/* Stack checking */
/*
* Return non-zero when we run out of memory on the stack; zero otherwise.
@ -1541,27 +1537,10 @@ _Py_SourceAsString(PyObject *cmd, const char *funcname, const char *what, PyComp
int
PyOS_CheckStack(void)
{
__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;
PyThreadState *tstate = _PyThreadState_GET();
return _Py_ReachedRecursionLimit(tstate);
}
#endif /* WIN32 && _MSC_VER */
/* Alternate implementations can be added here... */
#endif /* USE_STACKCHECK */
/* Deprecated C API functions still provided for binary compatibility */