55 lines
1.5 KiB
Python
55 lines
1.5 KiB
Python
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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Ftrace built-in backend.
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"""
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__author__ = "Eiichi Tsukata <eiichi.tsukata.xh@hitachi.com>"
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__copyright__ = "Copyright (C) 2013 Hitachi, Ltd."
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__license__ = "GPL version 2 or (at your option) any later version"
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__maintainer__ = "Stefan Hajnoczi"
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__email__ = "stefanha@redhat.com"
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from tracetool import out
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PUBLIC = True
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def c(events):
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pass
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def h(events):
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out('#include "trace/ftrace.h"',
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'#include "trace/control.h"',
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'',
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)
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for e in events:
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argnames = ", ".join(e.args.names())
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if len(e.args) > 0:
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argnames = ", " + argnames
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out('static inline void trace_%(name)s(%(args)s)',
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'{',
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' char ftrace_buf[MAX_TRACE_STRLEN];',
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' int unused __attribute__ ((unused));',
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' int trlen;',
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' bool _state = trace_event_get_state(%(event_id)s);',
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' if (_state) {',
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' trlen = snprintf(ftrace_buf, MAX_TRACE_STRLEN,',
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' "%(name)s " %(fmt)s "\\n" %(argnames)s);',
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' trlen = MIN(trlen, MAX_TRACE_STRLEN - 1);',
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' unused = write(trace_marker_fd, ftrace_buf, trlen);',
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' }',
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'}',
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name = e.name,
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args = e.args,
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event_id = "TRACE_" + e.name.upper(),
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fmt = e.fmt.rstrip("\n"),
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argnames = argnames,
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)
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