1#!/usr/bin/env python 2# -*- coding: utf-8 -*- 3 4""" 5Ftrace built-in backend. 6""" 7 8__author__ = "Eiichi Tsukata <eiichi.tsukata.xh@hitachi.com>" 9__copyright__ = "Copyright (C) 2013 Hitachi, Ltd." 10__license__ = "GPL version 2 or (at your option) any later version" 11 12__maintainer__ = "Stefan Hajnoczi" 13__email__ = "stefanha@redhat.com" 14 15 16from tracetool import out 17 18 19PUBLIC = True 20 21 22def generate_h_begin(events, group): 23 out('#include "trace/ftrace.h"', 24 '') 25 26 27def generate_h(event, group): 28 argnames = ", ".join(event.args.names()) 29 if len(event.args) > 0: 30 argnames = ", " + argnames 31 32 out(' {', 33 ' char ftrace_buf[MAX_TRACE_STRLEN];', 34 ' int unused __attribute__ ((unused));', 35 ' int trlen;', 36 ' if (trace_event_get_state(%(event_id)s)) {', 37 ' trlen = snprintf(ftrace_buf, MAX_TRACE_STRLEN,', 38 ' "%(name)s " %(fmt)s "\\n" %(argnames)s);', 39 ' trlen = MIN(trlen, MAX_TRACE_STRLEN - 1);', 40 ' unused = write(trace_marker_fd, ftrace_buf, trlen);', 41 ' }', 42 ' }', 43 name=event.name, 44 args=event.args, 45 event_id="TRACE_" + event.name.upper(), 46 fmt=event.fmt.rstrip("\n"), 47 argnames=argnames) 48 49 50def generate_h_backend_dstate(event, group): 51 out(' trace_event_get_state_dynamic_by_id(%(event_id)s) || \\', 52 event_id="TRACE_" + event.name.upper()) 53