jcs.org
qemu with hax to log dma reads & writes
jcs.org/2018/11/12/vfio
1# -*- coding: utf-8 -*-
2
3"""
4DTrace/SystemTAP backend.
5"""
6
7__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
8__copyright__ = "Copyright 2012-2017, 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
16
17
18PUBLIC = True
19
20
21PROBEPREFIX = None
22
23def probeprefix():
24 if PROBEPREFIX is None:
25 raise ValueError("you must set PROBEPREFIX")
26 return PROBEPREFIX
27
28
29BINARY = None
30
31def binary():
32 if BINARY is None:
33 raise ValueError("you must set BINARY")
34 return BINARY
35
36
37def generate_h_begin(events, group):
38 if group == "root":
39 header = "trace-dtrace-root.h"
40 else:
41 header = "trace-dtrace.h"
42
43 # Workaround for ust backend, which also includes <sys/sdt.h> and may
44 # require SDT_USE_VARIADIC to be defined. If dtrace includes <sys/sdt.h>
45 # first without defining SDT_USE_VARIADIC then ust breaks because the
46 # STAP_PROBEV() macro is not defined.
47 out('#define SDT_USE_VARIADIC 1')
48
49 out('#include "%s"' % header,
50 '')
51
52 # SystemTap defines <provider>_<name>_ENABLED() but other DTrace
53 # implementations might not.
54 for e in events:
55 out('#ifndef QEMU_%(uppername)s_ENABLED',
56 '#define QEMU_%(uppername)s_ENABLED() true',
57 '#endif',
58 uppername=e.name.upper())
59
60def generate_h(event, group):
61 out(' QEMU_%(uppername)s(%(argnames)s);',
62 uppername=event.name.upper(),
63 argnames=", ".join(event.args.names()))
64
65
66def generate_h_backend_dstate(event, group):
67 out(' QEMU_%(uppername)s_ENABLED() || \\',
68 uppername=event.name.upper())