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 15import os.path 16 17from tracetool import out 18 19 20PUBLIC = True 21 22 23def generate_h_begin(events, group): 24 out('#include "trace/ftrace.h"', 25 '') 26 27 28def generate_h(event, group): 29 argnames = ", ".join(event.args.names()) 30 if len(event.args) > 0: 31 argnames = ", " + argnames 32 33 out(' {', 34 ' char ftrace_buf[MAX_TRACE_STRLEN];', 35 ' int unused __attribute__ ((unused));', 36 ' int trlen;', 37 ' if (trace_event_get_state(%(event_id)s)) {', 38 '#line %(event_lineno)d "%(event_filename)s"', 39 ' trlen = snprintf(ftrace_buf, MAX_TRACE_STRLEN,', 40 ' "%(name)s " %(fmt)s "\\n" %(argnames)s);', 41 '#line %(out_next_lineno)d "%(out_filename)s"', 42 ' trlen = MIN(trlen, MAX_TRACE_STRLEN - 1);', 43 ' unused = write(trace_marker_fd, ftrace_buf, trlen);', 44 ' }', 45 ' }', 46 name=event.name, 47 args=event.args, 48 event_id="TRACE_" + event.name.upper(), 49 event_lineno=event.lineno, 50 event_filename=os.path.relpath(event.filename), 51 fmt=event.fmt.rstrip("\n"), 52 argnames=argnames) 53 54 55def generate_h_backend_dstate(event, group): 56 out(' trace_event_get_state_dynamic_by_id(%(event_id)s) || \\', 57 event_id="TRACE_" + event.name.upper()) 58