mirror of https://gitee.com/openkylin/qemu.git
110 lines
2.4 KiB
Python
110 lines
2.4 KiB
Python
#!/usr/bin/env python
|
|
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
DTrace/SystemTAP backend.
|
|
"""
|
|
|
|
__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
|
|
__copyright__ = "Copyright 2012, Lluís Vilanova <vilanova@ac.upc.edu>"
|
|
__license__ = "GPL version 2 or (at your option) any later version"
|
|
|
|
__maintainer__ = "Stefan Hajnoczi"
|
|
__email__ = "stefanha@linux.vnet.ibm.com"
|
|
|
|
|
|
from tracetool import out
|
|
|
|
|
|
PUBLIC = True
|
|
|
|
|
|
PROBEPREFIX = None
|
|
|
|
def _probeprefix():
|
|
if PROBEPREFIX is None:
|
|
raise ValueError("you must set PROBEPREFIX")
|
|
return PROBEPREFIX
|
|
|
|
|
|
BINARY = None
|
|
|
|
def _binary():
|
|
if BINARY is None:
|
|
raise ValueError("you must set BINARY")
|
|
return BINARY
|
|
|
|
|
|
def c(events):
|
|
pass
|
|
|
|
|
|
def h(events):
|
|
out('#include "trace/generated-tracers-dtrace.h"',
|
|
'')
|
|
|
|
for e in events:
|
|
out('static inline void trace_%(name)s(%(args)s) {',
|
|
' QEMU_%(uppername)s(%(argnames)s);',
|
|
'}',
|
|
name = e.name,
|
|
args = e.args,
|
|
uppername = e.name.upper(),
|
|
argnames = ", ".join(e.args.names()),
|
|
)
|
|
|
|
|
|
def d(events):
|
|
out('provider qemu {')
|
|
|
|
for e in events:
|
|
args = str(e.args)
|
|
|
|
# DTrace provider syntax expects foo() for empty
|
|
# params, not foo(void)
|
|
if args == 'void':
|
|
args = ''
|
|
|
|
# Define prototype for probe arguments
|
|
out('',
|
|
'probe %(name)s(%(args)s);',
|
|
name = e.name,
|
|
args = args,
|
|
)
|
|
|
|
out('',
|
|
'};')
|
|
|
|
|
|
# Technically 'self' is not used by systemtap yet, but
|
|
# they recommended we keep it in the reserved list anyway
|
|
RESERVED_WORDS = (
|
|
'break', 'catch', 'continue', 'delete', 'else', 'for',
|
|
'foreach', 'function', 'global', 'if', 'in', 'limit',
|
|
'long', 'next', 'probe', 'return', 'self', 'string',
|
|
'try', 'while'
|
|
)
|
|
|
|
def stap(events):
|
|
for e in events:
|
|
# Define prototype for probe arguments
|
|
out('probe %(probeprefix)s.%(name)s = process("%(binary)s").mark("%(name)s")',
|
|
'{',
|
|
probeprefix = _probeprefix(),
|
|
name = e.name,
|
|
binary = _binary(),
|
|
)
|
|
|
|
i = 1
|
|
if len(e.args) > 0:
|
|
for name in e.args.names():
|
|
# Append underscore to reserved keywords
|
|
if name in RESERVED_WORDS:
|
|
name += '_'
|
|
out(' %s = $arg%d;' % (name, i))
|
|
i += 1
|
|
|
|
out('}')
|
|
|
|
out()
|