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/*
* Interface for configuring and controlling the state of tracing events.
*
* Copyright (C) 2014-2017 Lluís Vilanova <vilanova@ac.upc.edu>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qemu/lockable.h"
#include "cpu.h"
#include "trace/control.h"
void trace_event_set_state_dynamic_init(TraceEvent *ev, bool state)
{
bool state_pre;
assert(trace_event_get_state_static(ev));
/*
* We ignore the "vcpu" property here, since no vCPUs have been created
* yet. Then dstate can only be 1 or 0.
*/
state_pre = *ev->dstate;
if (state_pre != state) {
if (state) {
trace_events_enabled_count++;
*ev->dstate = 1;
} else {
trace_events_enabled_count--;
*ev->dstate = 0;
}
}
}
void trace_event_set_state_dynamic(TraceEvent *ev, bool state)
{
assert(trace_event_get_state_static(ev));
/*
* There is no longer a "vcpu" property, dstate can only be 1 or
* 0. With it, we haven't instantiated any vCPU yet, so we will
* set a global state instead, and trace_init_vcpu will reconcile
* it afterwards.
*/
bool state_pre = *ev->dstate;
if (state_pre != state) {
if (state) {
trace_events_enabled_count++;
*ev->dstate = 1;
} else {
trace_events_enabled_count--;
*ev->dstate = 0;
}
}
}
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