jcs.org
qemu with hax to log dma reads & writes
jcs.org/2018/11/12/vfio
1# -*- coding: utf-8 -*-
2
3"""
4Generate .stp file (DTrace with SystemTAP only).
5"""
6
7__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
8__copyright__ = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>"
9__license__ = "GPL version 2 or (at your option) any later version"
10
11__maintainer__ = "Stefan Hajnoczi"
12__email__ = "stefanha@redhat.com"
13
14
15from tracetool import out
16from tracetool.backend.dtrace import binary, probeprefix
17
18
19# Technically 'self' is not used by systemtap yet, but
20# they recommended we keep it in the reserved list anyway
21RESERVED_WORDS = (
22 'break', 'catch', 'continue', 'delete', 'else', 'for',
23 'foreach', 'function', 'global', 'if', 'in', 'limit',
24 'long', 'next', 'probe', 'return', 'self', 'string',
25 'try', 'while'
26 )
27
28
29def stap_escape(identifier):
30 # Append underscore to reserved keywords
31 if identifier in RESERVED_WORDS:
32 return identifier + '_'
33 return identifier
34
35
36def generate(events, backend, group):
37 events = [e for e in events
38 if "disable" not in e.properties]
39
40 out('/* This file is autogenerated by tracetool, do not edit. */',
41 '')
42
43 for e in events:
44 # Define prototype for probe arguments
45 out('probe %(probeprefix)s.%(name)s = process("%(binary)s").mark("%(name)s")',
46 '{',
47 probeprefix=probeprefix(),
48 name=e.name,
49 binary=binary())
50
51 i = 1
52 if len(e.args) > 0:
53 for name in e.args.names():
54 name = stap_escape(name)
55 out(' %s = $arg%d;' % (name, i))
56 i += 1
57
58 out('}')
59
60 out()