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# -*- coding: utf-8 -*-
"""
LTTng User Space Tracing backend.
"""
__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
__copyright__ = "Copyright 2012-2017, Lluís Vilanova <vilanova@ac.upc.edu>"
__license__ = "GPL version 2 or (at your option) any later version"
__maintainer__ = "Stefan Hajnoczi"
__email__ = "stefanha@redhat.com"
from tracetool import out
PUBLIC = True
def generate_h_begin(events, group):
if group == "root":
header = "trace-ust-root.h"
else:
header = "trace-ust.h"
out('#include <lttng/tracepoint.h>',
'#include "%s"' % header,
'',
'/* tracepoint_enabled() was introduced in LTTng UST 2.7 */',
'#ifndef tracepoint_enabled',
'#define tracepoint_enabled(a, b) true',
'#endif',
'')
def generate_h(event, group):
argnames = ", ".join(event.args.names())
if len(event.args) > 0:
argnames = ", " + argnames
out(' tracepoint(qemu, %(name)s%(tp_args)s);',
name=event.name,
tp_args=argnames)
def generate_h_backend_dstate(event, group):
out(' tracepoint_enabled(qemu, %(name)s) || \\',
name=event.name)
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