stubs/trace-control.c

   1 /*
   2  * Interface for configuring and controlling the state of tracing events.
   3  *
   4  * Copyright (C) 2014-2016 Lluís Vilanova <vilanova@ac.upc.edu>
   5  *
   6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   7  * See the COPYING file in the top-level directory.
   8  */
   9
  10 #include "qemu/osdep.h"
  11 #include "trace/control.h"
  12
  13
  14 void trace_event_set_state_dynamic_init(TraceEvent *ev, bool state)
  15 {
  16     trace_event_set_state_dynamic(ev, state);
  17 }
  18
  19 void trace_event_set_state_dynamic(TraceEvent *ev, bool state)
  20 {
  21     bool state_pre;
  22     assert(trace_event_get_state_static(ev));
  23
  24     /*
  25      * We ignore the "vcpu" property here, since there's no target code. Then
  26      * dstate can only be 1 or 0.
  27      */
  28     state_pre = *(ev->dstate);
  29     if (state_pre != state) {
  30         if (state) {
  31             trace_events_enabled_count++;
  32             *(ev->dstate) = 1;
  33         } else {
  34             trace_events_enabled_count--;
  35             *(ev->dstate) = 0;
  36         }
  37     }
  38 }