| #!/usr/bin/env python |
| # -*- 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): |
| out('#include "trace/ftrace.h"', |
| '#include "trace/control.h"', |
| '') |
| |
| |
| def generate_h(event): |
| 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)) {', |
| ' trlen = snprintf(ftrace_buf, MAX_TRACE_STRLEN,', |
| ' "%(name)s " %(fmt)s "\\n" %(argnames)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(), |
| fmt=event.fmt.rstrip("\n"), |
| argnames=argnames) |
