98 lines
2.1 KiB
Python
98 lines
2.1 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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DTrace/SystemTAP backend.
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"""
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__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
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__copyright__ = "Copyright 2012, Lluís Vilanova <vilanova@ac.upc.edu>"
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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@linux.vnet.ibm.com"
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from tracetool import out
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PROBEPREFIX = None
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def _probeprefix():
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if PROBEPREFIX is None:
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raise ValueError("you must set PROBEPREFIX")
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return PROBEPREFIX
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BINARY = None
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def _binary():
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if BINARY is None:
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raise ValueError("you must set BINARY")
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return BINARY
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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-dtrace.h"',
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'')
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for e in events:
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out('static inline void trace_%(name)s(%(args)s) {',
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' QEMU_%(uppername)s(%(argnames)s);',
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'}',
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name = e.name,
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args = e.args,
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uppername = e.name.upper(),
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argnames = ", ".join(e.args.names()),
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)
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def d(events):
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out('provider qemu {')
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for e in events:
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args = str(e.args)
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# DTrace provider syntax expects foo() for empty
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# params, not foo(void)
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if args == 'void':
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args = ''
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# Define prototype for probe arguments
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out('',
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'probe %(name)s(%(args)s);',
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name = e.name,
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args = args,
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)
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out('',
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'};')
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def stap(events):
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for e in events:
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# Define prototype for probe arguments
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out('probe %(probeprefix)s.%(name)s = process("%(binary)s").mark("%(name)s")',
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'{',
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probeprefix = _probeprefix(),
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name = e.name,
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binary = _binary(),
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)
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i = 1
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if len(e.args) > 0:
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for name in e.args.names():
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# 'limit' is a reserved keyword
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if name == 'limit':
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name = '_limit'
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out(' %s = $arg%d;' % (name.lstrip(), i))
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i += 1
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out('}')
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out()
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