9397740244
Instead of having a global dstate array, declare a single
'uint16 TRACE_${EVENT_NAME}_DSTATE' variable for each
trace event. Record a pointer to this variable in the
TraceEvent struct too.
By turning trace_event_get_state_dynamic_by_id into a
macro, this still hits the fast path, and cache affinity
is ensured by declaring all the uint16 vars adjacent to
each other.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 1475588159-30598-7-git-send-email-berrange@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
52 lines
1.3 KiB
C
52 lines
1.3 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) 2014-2016 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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#include "qemu/osdep.h"
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#include "trace/control.h"
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void trace_event_set_state_dynamic_init(TraceEvent *ev, bool state)
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{
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trace_event_set_state_dynamic(ev, state);
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}
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void trace_event_set_state_dynamic(TraceEvent *ev, bool state)
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{
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bool state_pre;
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assert(trace_event_get_state_static(ev));
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/*
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* We ignore the "vcpu" property here, since there's no target code. Then
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* dstate can only be 1 or 0.
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*/
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state_pre = *(ev->dstate);
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if (state_pre != state) {
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if (state) {
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trace_events_enabled_count++;
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*(ev->dstate) = 1;
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} else {
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trace_events_enabled_count--;
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*(ev->dstate) = 0;
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}
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}
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}
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void trace_event_set_vcpu_state_dynamic(CPUState *vcpu,
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TraceEvent *ev, bool state)
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{
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/* should never be called on non-target binaries */
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abort();
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}
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void trace_init_vcpu(CPUState *vcpu)
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{
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/* should never be called on non-target binaries */
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abort();
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}
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