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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
trace/generated-tracers.h
"""
__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
__copyright__ = "Copyright 2012-2017, 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
def generate(events, backend, group):
if group == "root":
header = "trace/control-vcpu.h"
else:
header = "trace/control.h"
out('/* This file is autogenerated by tracetool, do not edit. */',
'',
'#ifndef TRACE_%s_GENERATED_TRACERS_H' % group.upper(),
'#define TRACE_%s_GENERATED_TRACERS_H' % group.upper(),
'',
'#include "%s"' % header,
'')
for e in events:
out('extern TraceEvent %(event)s;',
event = e.api(e.QEMU_EVENT))
for e in events:
out('extern uint16_t %s;' % e.api(e.QEMU_DSTATE))
# static state
for e in events:
if 'disable' in e.properties:
enabled = 0
else:
enabled = 1
if "tcg-exec" in e.properties:
# a single define for the two "sub-events"
out('#define TRACE_%(name)s_ENABLED %(enabled)d',
name=e.original.name.upper(),
enabled=enabled)
out('#define TRACE_%s_ENABLED %d' % (e.name.upper(), enabled))
backend.generate_begin(events, group)
for e in events:
# tracer-specific dstate
out('',
'#define %(api)s() ( \\',
api=e.api(e.QEMU_BACKEND_DSTATE))
if "disable" not in e.properties:
backend.generate_backend_dstate(e, group)
out(' false)')
# tracer without checks
out('',
'static inline void %(api)s(%(args)s)',
'{',
api=e.api(e.QEMU_TRACE_NOCHECK),
args=e.args)
if "disable" not in e.properties:
backend.generate(e, group)
out('}')
# tracer wrapper with checks (per-vCPU tracing)
if "vcpu" in e.properties:
trace_cpu = next(iter(e.args))[1]
cond = "trace_event_get_vcpu_state(%(cpu)s,"\
" TRACE_%(id)s)"\
% dict(
cpu=trace_cpu,
id=e.name.upper())
else:
cond = "true"
out('',
'static inline void %(api)s(%(args)s)',
'{',
' if (%(cond)s) {',
' %(api_nocheck)s(%(names)s);',
' }',
'}',
api=e.api(),
api_nocheck=e.api(e.QEMU_TRACE_NOCHECK),
args=e.args,
names=", ".join(e.args.names()),
cond=cond)
backend.generate_end(events, group)
out('#endif /* TRACE_%s_GENERATED_TRACERS_H */' % group.upper())
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