13d4ff07e8
docs/devel/tracing.txt explains "since many source files include
trace.h, [the generated trace.h use] a minimum of types and other
header files included to keep the namespace clean and compile times
and dependencies down."
Commit 4815185902 "trace: Add per-vCPU tracing states for events with
the 'vcpu' property" made them all include qom/cpu.h via
control-internal.h. qom/cpu.h in turn includes about thirty headers.
Ouch.
Per-vCPU tracing is currently not supported in sub-directories'
trace-events. In other words, qom/cpu.h can only be used in
trace-root.h, not in any trace.h.
Split trace/control-vcpu.h off trace/control.h and
trace/control-internal.h. Have the generated trace.h include
trace/control.h (which no longer includes qom/cpu.h), and trace-root.h
include trace/control-vcpu.h (which includes it).
The resulting improvement is a bit disappointing: in my "build
everything" tree, some 1100 out of 6600 objects (not counting tests
and objects that don't depend on qemu/osdep.h) depend on a trace.h,
and about 600 of them no longer depend on qom/cpu.h. But more than
1300 others depend on trace-root.h. More work is clearly needed.
Left for another day.
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190812052359.30071-8-armbru@redhat.com>
77 lines
2.1 KiB
Python
77 lines
2.1 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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trace/generated-tracers.c
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"""
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__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
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__copyright__ = "Copyright 2012-2014, 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@linux.vnet.ibm.com"
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from tracetool import out
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def generate(events, backend, group):
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active_events = [e for e in events
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if "disable" not in e.properties]
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if group == "root":
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header = "trace-root.h"
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else:
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header = "trace.h"
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out('/* This file is autogenerated by tracetool, do not edit. */',
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'',
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'#include "qemu/osdep.h"',
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'#include "qemu/module.h"',
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'#include "%s"' % header,
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'')
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for e in events:
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out('uint16_t %s;' % e.api(e.QEMU_DSTATE))
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for e in events:
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if "vcpu" in e.properties:
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vcpu_id = 0
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else:
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vcpu_id = "TRACE_VCPU_EVENT_NONE"
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out('TraceEvent %(event)s = {',
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' .id = 0,',
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' .vcpu_id = %(vcpu_id)s,',
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' .name = \"%(name)s\",',
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' .sstate = %(sstate)s,',
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' .dstate = &%(dstate)s ',
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'};',
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event = e.api(e.QEMU_EVENT),
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vcpu_id = vcpu_id,
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name = e.name,
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sstate = "TRACE_%s_ENABLED" % e.name.upper(),
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dstate = e.api(e.QEMU_DSTATE))
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out('TraceEvent *%(group)s_trace_events[] = {',
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group = group.lower())
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for e in events:
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out(' &%(event)s,', event = e.api(e.QEMU_EVENT))
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out(' NULL,',
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'};',
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'')
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out('static void trace_%(group)s_register_events(void)',
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'{',
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' trace_event_register_group(%(group)s_trace_events);',
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'}',
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'trace_init(trace_%(group)s_register_events)',
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group = group.lower())
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backend.generate_begin(active_events, group)
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for event in active_events:
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backend.generate(event, group)
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backend.generate_end(active_events, group)
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