[3.11] gh-99110: Initialize frame->previous in init_frame to fix segmentation fault (GH-100182) (#100478)

(cherry picked from commit 88d565f32a709140664444c6dea20ecd35a10e94)

Co-authored-by: Bill Fisher <william.w.fisher@gmail.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/Modules/_testcapimodule.c b/Modules/_testcapimodule.c
index 70242d7..bb7de22 100644
--- a/Modules/_testcapimodule.c
+++ b/Modules/_testcapimodule.c
@@ -22,6 +22,7 @@
 
 #include "Python.h"
 #include "datetime.h"             // PyDateTimeAPI
+#include "frameobject.h"          // PyFrame_New
 #include "marshal.h"              // PyMarshal_WriteLongToFile
 #include "structmember.h"         // PyMemberDef
 #include <float.h>                // FLT_MAX
@@ -6001,6 +6002,22 @@ frame_getlasti(PyObject *self, PyObject *frame)
 }
 
 static PyObject *
+frame_new(PyObject *self, PyObject *args)
+{
+    PyObject *code, *globals, *locals;
+    if (!PyArg_ParseTuple(args, "OOO", &code, &globals, &locals)) {
+        return NULL;
+    }
+    if (!PyCode_Check(code)) {
+        PyErr_SetString(PyExc_TypeError, "argument must be a code object");
+        return NULL;
+    }
+    PyThreadState *tstate = PyThreadState_Get();
+
+    return (PyObject *)PyFrame_New(tstate, (PyCodeObject *)code, globals, locals);
+}
+
+static PyObject *
 eval_get_func_name(PyObject *self, PyObject *func)
 {
     return PyUnicode_FromString(PyEval_GetFuncName(func));
@@ -6492,6 +6509,7 @@ static PyMethodDef TestMethods[] = {
     {"frame_getgenerator", frame_getgenerator, METH_O, NULL},
     {"frame_getbuiltins", frame_getbuiltins, METH_O, NULL},
     {"frame_getlasti", frame_getlasti, METH_O, NULL},
+    {"frame_new", frame_new, METH_VARARGS, NULL},
     {"eval_get_func_name", eval_get_func_name, METH_O, NULL},
     {"eval_get_func_desc", eval_get_func_desc, METH_O, NULL},
     {"get_feature_macros", get_feature_macros, METH_NOARGS, NULL},