| # -*- coding: utf-8 -*- | |
| """ | |
| Ftrace built-in backend. | |
| """ | |
| __author__ = "Eiichi Tsukata <eiichi.tsukata.xh@hitachi.com>" | |
| __copyright__ = "Copyright (C) 2013 Hitachi, Ltd." | |
| __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): | |
| out('#include "trace/ftrace.h"', | |
| '') | |
| def generate_h(event, group): | |
| argnames = ", ".join(event.args.names()) | |
| if len(event.args) > 0: | |
| argnames = ", " + argnames | |
| out(' {', | |
| ' char ftrace_buf[MAX_TRACE_STRLEN];', | |
| ' int unused __attribute__ ((unused));', | |
| ' int trlen;', | |
| ' if (trace_event_get_state(%(event_id)s)) {', | |
| '#line %(event_lineno)d "%(event_filename)s"', | |
| ' trlen = snprintf(ftrace_buf, MAX_TRACE_STRLEN,', | |
| ' "%(name)s " %(fmt)s "\\n" %(argnames)s);', | |
| '#line %(out_next_lineno)d "%(out_filename)s"', | |
| ' trlen = MIN(trlen, MAX_TRACE_STRLEN - 1);', | |
| ' unused = write(trace_marker_fd, ftrace_buf, trlen);', | |
| ' }', | |
| ' }', | |
| name=event.name, | |
| args=event.args, | |
| event_id="TRACE_" + event.name.upper(), | |
| event_lineno=event.lineno, | |
| event_filename=event.filename, | |
| fmt=event.fmt.rstrip("\n"), | |
| argnames=argnames) | |
| def generate_h_backend_dstate(event, group): | |
| out(' trace_event_get_state_dynamic_by_id(%(event_id)s) || \\', | |
| event_id="TRACE_" + event.name.upper()) |