xref: /qemu/scripts/tracetool/backend/dtrace.py (revision 73e064cc) 
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@linux.vnet.ibm.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    out('#include "%s"' % header,
44        '')
45
46    # SystemTap defines <provider>_<name>_ENABLED() but other DTrace
47    # implementations might not.
48    for e in events:
49        out('#ifndef QEMU_%(uppername)s_ENABLED',
50            '#define QEMU_%(uppername)s_ENABLED() true',
51            '#endif',
52            uppername=e.name.upper())
53
54def generate_h(event, group):
55    out('    QEMU_%(uppername)s(%(argnames)s);',
56        uppername=event.name.upper(),
57        argnames=", ".join(event.args.names()))
58
59
60def generate_h_backend_dstate(event, group):
61    out('    QEMU_%(uppername)s_ENABLED() || \\',
62        uppername=event.name.upper())
63