c47db9b1db
Every generated inline probe function is wrapped with a
trivial caller that has a hard-coded condition test:
static inline void _nocheck__trace_test_wibble(void * context, int value)
{
tracepoint(qemu, test_wibble, context, value);
}
static inline void trace_test_wibble(void * context, int value)
{
if (true) {
_nocheck__trace_test_wibble(context, value);
}
}
This was introduced for TCG probes back in
864a2178: trace: [tcg] Do not generate TCG code to trace dynamically-disabled events
but is obsolete since
126d4123 tracing: excise the tcg related from tracetool
This commit removes the wrapping such that we have
static inline void trace_test_wibble(void * context, int value)
{
tracepoint(qemu, test_wibble, context, value);
}
The default build of qemu-system-x86_64 on Fedora with the
'log' backend, has its size reduced by 1 MB
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-id: 20250916081638.764020-7-berrange@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
78 lines
2.1 KiB
Python
78 lines
2.1 KiB
Python
# -*- coding: utf-8 -*-
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"""
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trace/generated-tracers.h
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"""
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__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
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__copyright__ = "Copyright 2012-2017, Lluís Vilanova <vilanova@ac.upc.edu>"
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__license__ = "GPL version 2 or (at your option) any later version"
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__maintainer__ = "Stefan Hajnoczi"
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__email__ = "stefanha@redhat.com"
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from tracetool import out
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def generate(events, backend, group):
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header = "trace/control.h"
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out('/* This file is autogenerated by tracetool, do not edit. */',
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'/* SPDX-License-Identifier: GPL-2.0-or-later */',
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'',
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'#ifndef TRACE_%s_GENERATED_TRACERS_H' % group.upper(),
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'#define TRACE_%s_GENERATED_TRACERS_H' % group.upper(),
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'',
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'#include "%s"' % header,
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'')
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for e in events:
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out('extern TraceEvent %(event)s;',
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event = e.api(e.QEMU_EVENT))
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for e in events:
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out('extern uint16_t %s;' % e.api(e.QEMU_DSTATE))
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# static state
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for e in events:
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if 'disable' in e.properties:
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enabled = 0
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else:
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enabled = 1
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if "tcg-exec" in e.properties:
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# a single define for the two "sub-events"
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out('#define TRACE_%(name)s_ENABLED %(enabled)d',
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name=e.original.name.upper(),
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enabled=enabled)
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out('#define TRACE_%s_ENABLED %d' % (e.name.upper(), enabled))
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backend.generate_begin(events, group)
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for e in events:
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# tracer-specific dstate
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out('',
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'#define %(api)s() ( \\',
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api=e.api(e.QEMU_BACKEND_DSTATE))
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if "disable" not in e.properties:
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backend.generate_backend_dstate(e, group)
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out(' false)')
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# tracer without checks
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out('',
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'static inline void %(api)s(%(args)s)',
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'{',
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api=e.api(),
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args=e.args)
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if "disable" not in e.properties:
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backend.generate(e, group)
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out('}')
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backend.generate_end(events, group)
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out('#endif /* TRACE_%s_GENERATED_TRACERS_H */' % group.upper())
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