qemu

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/*
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 * Interface for configuring and controlling the state of tracing events.
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 *
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 * Copyright (C) 2014-2017 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 "qemu/lockable.h"
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#include "cpu.h"
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#include "trace/trace-root.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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    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 no vCPUs have been created
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     * yet. Then 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_state_dynamic(TraceEvent *ev, bool state)
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{
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    assert(trace_event_get_state_static(ev));
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    /*
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     * There is no longer a "vcpu" property, dstate can only be 1 or
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     * 0. With it, we haven't instantiated any vCPU yet, so we will
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     * set a global state instead, and trace_init_vcpu will reconcile
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     * it afterwards.
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     */
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    bool 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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