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_init(TraceEvent *ev, bool state)
  17 {
  18     TraceEventID id = trace_event_get_id(ev);
  19     bool state_pre;
  20     assert(trace_event_get_state_static(ev));
  21     /*
  22      * We ignore the "vcpu" property here, since no vCPUs have been created
  23      * yet. Then dstate can only be 1 or 0.
  24      */
  25     state_pre = trace_events_dstate[id];
  26     if (state_pre != state) {
  27         if (state) {
  28             trace_events_enabled_count++;
  29             trace_events_dstate[id] = 1;
  30         } else {
  31             trace_events_enabled_count--;
  32             trace_events_dstate[id] = 0;
  33         }
  34     }
  35 }
  36
  37 void trace_event_set_state_dynamic(TraceEvent *ev, bool state)
  38 {
  39     CPUState *vcpu;
  40     assert(trace_event_get_state_static(ev));
  41     if (trace_event_is_vcpu(ev)) {
  42         CPU_FOREACH(vcpu) {
  43             trace_event_set_vcpu_state_dynamic(vcpu, ev, state);
  44         }
  45     } else {
  46         /* Without the "vcpu" property, dstate can only be 1 or 0 */
  47         TraceEventID id = trace_event_get_id(ev);
  48         bool state_pre = trace_events_dstate[id];
  49         if (state_pre != state) {
  50             if (state) {
  51                 trace_events_enabled_count++;
  52                 trace_events_dstate[id] = 1;
  53             } else {
  54                 trace_events_enabled_count--;
  55                 trace_events_dstate[id] = 0;
  56             }
  57         }
  58     }
  59 }
  60
  61 void trace_event_set_vcpu_state_dynamic(CPUState *vcpu,
  62                                         TraceEvent *ev, bool state)
  63 {
  64     TraceEventID id;
  65     TraceEventVCPUID vcpu_id;
  66     bool state_pre;
  67     assert(trace_event_get_state_static(ev));
  68     assert(trace_event_is_vcpu(ev));
  69     id = trace_event_get_id(ev);
  70     vcpu_id = trace_event_get_vcpu_id(ev);
  71     state_pre = test_bit(vcpu_id, vcpu->trace_dstate);
  72     if (state_pre != state) {
  73         if (state) {
  74             trace_events_enabled_count++;
  75             set_bit(vcpu_id, vcpu->trace_dstate);
  76             trace_events_dstate[id]++;
  77         } else {
  78             trace_events_enabled_count--;
  79             clear_bit(vcpu_id, vcpu->trace_dstate);
  80             trace_events_dstate[id]--;
  81         }
  82     }
  83 }