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bpo-40421: Add PyFrame_GetBack() function (GH-19765)

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New PyFrame_GetBack() function: get the frame next outer frame.

Replace frame->f_back with PyFrame_GetBack(frame) in most code but
frameobject.c, ceval.c and genobject.c.
This commit is contained in:
Victor Stinner 2020-04-29 03:28:46 +02:00 • committed by GitHub
parent 66abe98a81
commit 7036477323
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GPG key ID: 4AEE18F83AFDEB23
9 changed files with 65 additions and 19 deletions
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10
Python/sysmodule.c
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@ -16,7 +16,7 @@ Data members:
#include "Python.h"
#include "code.h"
#include "frameobject.h"
#include "frameobject.h" // PyFrame_GetBack()
#include "pycore_ceval.h" // _Py_RecursionLimitLowerWaterMark()
#include "pycore_initconfig.h"
#include "pycore_object.h"
@ -1787,14 +1787,17 @@ sys__getframe_impl(PyObject *module, int depth)
/*[clinic end generated code: output=d438776c04d59804 input=c1be8a6464b11ee5]*/
{
PyThreadState *tstate = _PyThreadState_GET();
PyFrameObject *f = tstate->frame;
PyFrameObject *f = PyThreadState_GetFrame(tstate);
if (_PySys_Audit(tstate, "sys._getframe", "O", f) < 0) {
Py_DECREF(f);
return NULL;
}
while (depth > 0 && f != NULL) {
f = f->f_back;
PyFrameObject *back = PyFrame_GetBack(f);
Py_DECREF(f);
f = back;
--depth;
}
if (f == NULL) {
@ -1802,7 +1805,6 @@ sys__getframe_impl(PyObject *module, int depth)
"call stack is not deep enough");
return NULL;
}
Py_INCREF(f);
return (PyObject*)f;
}