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