trace/control-target.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 "cpu.h"
  12 #include "trace/control.h"
  13 #include "translate-all.h"
  14
  15
  16 void trace_event_set_state_dynamic(TraceEvent *ev, bool state)
  17 {
  18     CPUState *vcpu;
  19     assert(trace_event_get_state_static(ev));
  20     if (trace_event_is_vcpu(ev)) {
  21         CPU_FOREACH(vcpu) {
  22             trace_event_set_vcpu_state_dynamic(vcpu, ev, state);
  23         }
  24     } else {
  25         TraceEventID id = trace_event_get_id(ev);
  26         trace_events_enabled_count += state - trace_events_dstate[id];
  27         trace_events_dstate[id] = state;
  28     }
  29 }
  30
  31 void trace_event_set_vcpu_state_dynamic(CPUState *vcpu,
  32                                         TraceEvent *ev, bool state)
  33 {
  34     TraceEventID id;
  35     TraceEventVCPUID vcpu_id;
  36     bool state_pre;
  37     assert(trace_event_get_state_static(ev));
  38     assert(trace_event_is_vcpu(ev));
  39     id = trace_event_get_id(ev);
  40     vcpu_id = trace_event_get_vcpu_id(ev);
  41     state_pre = test_bit(vcpu_id, vcpu->trace_dstate);
  42     if (state_pre != state) {
  43         if (state) {
  44             trace_events_enabled_count++;
  45             set_bit(vcpu_id, vcpu->trace_dstate);
  46             trace_events_dstate[id]++;
  47         } else {
  48             trace_events_enabled_count--;
  49             clear_bit(vcpu_id, vcpu->trace_dstate);
  50             trace_events_dstate[id]--;
  51         }
  52     }
  53 }