bpo-32591: Add native coroutine origin tracking (#5250)

* Add coro.cr_origin and sys.set_coroutine_origin_tracking_depth
* Use coroutine origin information in the unawaited coroutine warning
* Stop using set_coroutine_wrapper in asyncio debug mode
* In BaseEventLoop.set_debug, enable debugging in the correct thread

1 files changed, 66 insertions, 0 deletions

diff --git a/Python/clinic/sysmodule.c.h b/Python/clinic/sysmodule.c.h
new file mode 100644
index 0000000000..3e1480513f
--- /dev/null
+++ b/Python/clinic/sysmodule.c.h
@@ -0,0 +1,66 @@
+/*[clinic input]
+preserve
+[clinic start generated code]*/
+
+PyDoc_STRVAR(sys_set_coroutine_origin_tracking_depth__doc__,
+"set_coroutine_origin_tracking_depth($module, /, depth)\n"
+"--\n"
+"\n"
+"Enable or disable origin tracking for coroutine objects in this thread.\n"
+"\n"
+"Coroutine objects will track \'depth\' frames of traceback information about\n"
+"where they came from, available in their cr_origin attribute. Set depth of 0\n"
+"to disable.");
+
+#define SYS_SET_COROUTINE_ORIGIN_TRACKING_DEPTH_METHODDEF    \
+    {"set_coroutine_origin_tracking_depth", (PyCFunction)sys_set_coroutine_origin_tracking_depth, METH_FASTCALL|METH_KEYWORDS, sys_set_coroutine_origin_tracking_depth__doc__},
+
+static PyObject *
+sys_set_coroutine_origin_tracking_depth_impl(PyObject *module, int depth);
+
+static PyObject *
+sys_set_coroutine_origin_tracking_depth(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames)
+{
+    PyObject *return_value = NULL;
+    static const char * const _keywords[] = {"depth", NULL};
+    static _PyArg_Parser _parser = {"i:set_coroutine_origin_tracking_depth", _keywords, 0};
+    int depth;
+
+    if (!_PyArg_ParseStackAndKeywords(args, nargs, kwnames, &_parser,
+        &depth)) {
+        goto exit;
+    }
+    return_value = sys_set_coroutine_origin_tracking_depth_impl(module, depth);
+
+exit:
+    return return_value;
+}
+
+PyDoc_STRVAR(sys_get_coroutine_origin_tracking_depth__doc__,
+"get_coroutine_origin_tracking_depth($module, /)\n"
+"--\n"
+"\n"
+"Check status of origin tracking for coroutine objects in this thread.");
+
+#define SYS_GET_COROUTINE_ORIGIN_TRACKING_DEPTH_METHODDEF    \
+    {"get_coroutine_origin_tracking_depth", (PyCFunction)sys_get_coroutine_origin_tracking_depth, METH_NOARGS, sys_get_coroutine_origin_tracking_depth__doc__},
+
+static int
+sys_get_coroutine_origin_tracking_depth_impl(PyObject *module);
+
+static PyObject *
+sys_get_coroutine_origin_tracking_depth(PyObject *module, PyObject *Py_UNUSED(ignored))
+{
+    PyObject *return_value = NULL;
+    int _return_value;
+
+    _return_value = sys_get_coroutine_origin_tracking_depth_impl(module);
+    if ((_return_value == -1) && PyErr_Occurred()) {
+        goto exit;
+    }
+    return_value = PyLong_FromLong((long)_return_value);
+
+exit:
+    return return_value;
+}
+/*[clinic end generated code: output=4a3ac42b97d710ff input=a9049054013a1b77]*/