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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>
61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
/*
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* Interface for configuring and controlling the state of tracing events.
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*
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* Copyright (C) 2011-2016 Lluís Vilanova <vilanova@ac.upc.edu>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef TRACE__CONTROL_INTERNAL_H
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#define TRACE__CONTROL_INTERNAL_H
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extern int trace_events_enabled_count;
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static inline bool trace_event_is_pattern(const char *str)
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{
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assert(str != NULL);
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return strchr(str, '*') != NULL;
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}
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static inline uint32_t trace_event_get_id(TraceEvent *ev)
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{
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assert(ev != NULL);
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return ev->id;
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}
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static inline uint32_t trace_event_get_vcpu_id(TraceEvent *ev)
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{
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return ev->vcpu_id;
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}
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static inline bool trace_event_is_vcpu(TraceEvent *ev)
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{
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return ev->vcpu_id != TRACE_VCPU_EVENT_NONE;
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}
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static inline const char * trace_event_get_name(TraceEvent *ev)
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{
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assert(ev != NULL);
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return ev->name;
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}
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static inline bool trace_event_get_state_static(TraceEvent *ev)
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{
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assert(ev != NULL);
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return ev->sstate;
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}
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/* it's on fast path, avoid consistency checks (asserts) */
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#define trace_event_get_state_dynamic_by_id(id) \
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(unlikely(trace_events_enabled_count) && _ ## id ## _DSTATE)
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static inline bool trace_event_get_state_dynamic(TraceEvent *ev)
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{
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return unlikely(trace_events_enabled_count) && *ev->dstate;
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}
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void trace_event_register_group(TraceEvent **events);
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#endif /* TRACE__CONTROL_INTERNAL_H */
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