4815185902
Each vCPU gets a 'trace_dstate' bitmap to control the per-vCPU dynamic tracing state of events with the 'vcpu' property. Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
54 lines
1.6 KiB
C
54 lines
1.6 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 "cpu.h"
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#include "trace/control.h"
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#include "translate-all.h"
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void trace_event_set_state_dynamic(TraceEvent *ev, bool state)
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{
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CPUState *vcpu;
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assert(trace_event_get_state_static(ev));
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if (trace_event_is_vcpu(ev)) {
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CPU_FOREACH(vcpu) {
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trace_event_set_vcpu_state_dynamic(vcpu, ev, state);
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}
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} else {
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TraceEventID id = trace_event_get_id(ev);
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trace_events_enabled_count += state - trace_events_dstate[id];
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trace_events_dstate[id] = state;
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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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TraceEventID id;
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TraceEventVCPUID vcpu_id;
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bool state_pre;
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assert(trace_event_get_state_static(ev));
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assert(trace_event_is_vcpu(ev));
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id = trace_event_get_id(ev);
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vcpu_id = trace_event_get_vcpu_id(ev);
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state_pre = test_bit(vcpu_id, vcpu->trace_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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set_bit(vcpu_id, vcpu->trace_dstate);
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trace_events_dstate[id]++;
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} else {
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trace_events_enabled_count--;
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clear_bit(vcpu_id, vcpu->trace_dstate);
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trace_events_dstate[id]--;
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}
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}
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}
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