xref: /openbmc/qemu/scripts/tracetool/format/h.py (revision 0b1183e3) 
1#!/usr/bin/env python
2# -*- coding: utf-8 -*-
3
4"""
5trace/generated-tracers.h
6"""
7
8__author__     = "Lluís Vilanova <vilanova@ac.upc.edu>"
9__copyright__  = "Copyright 2012-2017, Lluís Vilanova <vilanova@ac.upc.edu>"
10__license__    = "GPL version 2 or (at your option) any later version"
11
12__maintainer__ = "Stefan Hajnoczi"
13__email__      = "stefanha@linux.vnet.ibm.com"
14
15
16from tracetool import out
17
18
19def generate(events, backend, group):
20    out('/* This file is autogenerated by tracetool, do not edit. */',
21        '',
22        '#ifndef TRACE_%s_GENERATED_TRACERS_H' % group.upper(),
23        '#define TRACE_%s_GENERATED_TRACERS_H' % group.upper(),
24        '',
25        '#include "qemu-common.h"',
26        '#include "trace/control.h"',
27        '')
28
29    for e in events:
30        out('extern TraceEvent %(event)s;',
31            event = e.api(e.QEMU_EVENT))
32
33    for e in events:
34        out('extern uint16_t %s;' % e.api(e.QEMU_DSTATE))
35
36    # static state
37    for e in events:
38        if 'disable' in e.properties:
39            enabled = 0
40        else:
41            enabled = 1
42        if "tcg-exec" in e.properties:
43            # a single define for the two "sub-events"
44            out('#define TRACE_%(name)s_ENABLED %(enabled)d',
45                name=e.original.name.upper(),
46                enabled=enabled)
47        out('#define TRACE_%s_ENABLED %d' % (e.name.upper(), enabled))
48
49    backend.generate_begin(events, group)
50
51    for e in events:
52        # tracer without checks
53        out('',
54            'static inline void %(api)s(%(args)s)',
55            '{',
56            api=e.api(e.QEMU_TRACE_NOCHECK),
57            args=e.args)
58
59        if "disable" not in e.properties:
60            backend.generate(e, group)
61
62        out('}')
63
64        # tracer wrapper with checks (per-vCPU tracing)
65        if "vcpu" in e.properties:
66            trace_cpu = next(iter(e.args))[1]
67            cond = "trace_event_get_vcpu_state(%(cpu)s,"\
68                   " TRACE_%(id)s)"\
69                   % dict(
70                       cpu=trace_cpu,
71                       id=e.name.upper())
72        else:
73            cond = "true"
74
75        out('',
76            'static inline void %(api)s(%(args)s)',
77            '{',
78            '    if (%(cond)s) {',
79            '        %(api_nocheck)s(%(names)s);',
80            '    }',
81            '}',
82            api=e.api(),
83            api_nocheck=e.api(e.QEMU_TRACE_NOCHECK),
84            args=e.args,
85            names=", ".join(e.args.names()),
86            cond=cond)
87
88    backend.generate_end(events, group)
89
90    out('#endif /* TRACE_%s_GENERATED_TRACERS_H */' % group.upper())
91