@@ -1630,6 +1630,9 @@ The following files are generated:
``$(prefix)qapi-commands.h``
Function prototypes for the QMP commands specified in the schema
+ ``$(prefix)qapi-commands.trace-events``
+ Trace event declarations, see :ref:`tracing`.
+
``$(prefix)qapi-init-commands.h``
Command initialization prototype
@@ -1650,6 +1653,13 @@ Example::
void qmp_marshal_my_command(QDict *args, QObject **ret, Error **errp);
#endif /* EXAMPLE_QAPI_COMMANDS_H */
+
+ $ cat qapi-generated/example-qapi-commands.trace-events
+ # AUTOMATICALLY GENERATED, DO NOT MODIFY
+
+ qmp_enter_my_command(const char *json) "%s"
+ qmp_exit_my_command(const char *result, bool succeeded) "%s %d"
+
$ cat qapi-generated/example-qapi-commands.c
[Uninteresting stuff omitted...]
@@ -1689,14 +1699,27 @@ Example::
goto out;
}
+ if (trace_event_get_state_backends(TRACE_QMP_ENTER_MY_COMMAND)) {
+ g_autoptr(GString) req_json = qobject_to_json(QOBJECT(args));
+
+ trace_qmp_enter_my_command(req_json->str);
+ }
+
retval = qmp_my_command(arg.arg1, &err);
if (err) {
+ trace_qmp_exit_my_command(error_get_pretty(err), false);
error_propagate(errp, err);
goto out;
}
qmp_marshal_output_UserDefOne(retval, ret, errp);
+ if (trace_event_get_state_backends(TRACE_QMP_EXIT_MY_COMMAND)) {
+ g_autoptr(GString) ret_json = qobject_to_json(*ret);
+
+ trace_qmp_exit_my_command(ret_json->str, true);
+ }
+
out:
visit_free(v);
v = qapi_dealloc_visitor_new();
@@ -1,3 +1,5 @@
+.. _tracing:
+
=======
Tracing
=======