bpo-39164: Add private _PyErr_GetExcInfo() function (GH-17752)
This adds a new function named _PyErr_GetExcInfo() that is a variation of the
original PyErr_GetExcInfo() taking a PyThreadState as its first argument.
That function allows to retrieve the exceptions information of any Python
thread -- not only the current one.
diff --git a/Include/cpython/pyerrors.h b/Include/cpython/pyerrors.h
index e3098b3..f8480fb 100644
--- a/Include/cpython/pyerrors.h
+++ b/Include/cpython/pyerrors.h
@@ -76,6 +76,7 @@
PyAPI_FUNC(void) _PyErr_SetKeyError(PyObject *);
_PyErr_StackItem *_PyErr_GetTopmostException(PyThreadState *tstate);
+PyAPI_FUNC(void) _PyErr_GetExcInfo(PyThreadState *, PyObject **, PyObject **, PyObject **);
/* Context manipulation (PEP 3134) */
diff --git a/Misc/NEWS.d/next/C API/2019-12-30-10-43-52.bpo-39164.WEV0uu.rst b/Misc/NEWS.d/next/C API/2019-12-30-10-43-52.bpo-39164.WEV0uu.rst
new file mode 100644
index 0000000..bb72ac7
--- /dev/null
+++ b/Misc/NEWS.d/next/C API/2019-12-30-10-43-52.bpo-39164.WEV0uu.rst
@@ -0,0 +1 @@
+Add a private ``_PyErr_GetExcInfo()`` function to retrieve exception information of the specified Python thread state.
diff --git a/Python/errors.c b/Python/errors.c
index d65707e..cdb4460 100644
--- a/Python/errors.c
+++ b/Python/errors.c
@@ -433,21 +433,27 @@
void
-PyErr_GetExcInfo(PyObject **p_type, PyObject **p_value, PyObject **p_traceback)
+_PyErr_GetExcInfo(PyThreadState *tstate,
+ PyObject **p_type, PyObject **p_value, PyObject **p_traceback)
{
- PyThreadState *tstate = _PyThreadState_GET();
-
_PyErr_StackItem *exc_info = _PyErr_GetTopmostException(tstate);
*p_type = exc_info->exc_type;
*p_value = exc_info->exc_value;
*p_traceback = exc_info->exc_traceback;
-
Py_XINCREF(*p_type);
Py_XINCREF(*p_value);
Py_XINCREF(*p_traceback);
}
+
+void
+PyErr_GetExcInfo(PyObject **p_type, PyObject **p_value, PyObject **p_traceback)
+{
+ PyThreadState *tstate = _PyThreadState_GET();
+ return _PyErr_GetExcInfo(tstate, p_type, p_value, p_traceback);
+}
+
void
PyErr_SetExcInfo(PyObject *p_type, PyObject *p_value, PyObject *p_traceback)
{