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     assert(trace_event_get_state_static(ev));
  20     /* Ignore "vcpu" property, since no vCPUs have been created yet */
  21     trace_events_enabled_count += state - trace_events_dstate[id];
  22     trace_events_dstate[id] = state;
  23 }
  24
  25 void trace_event_set_state_dynamic(TraceEvent *ev, bool state)
  26 {
  27     CPUState *vcpu;
  28     assert(trace_event_get_state_static(ev));
  29     if (trace_event_is_vcpu(ev)) {
  30         CPU_FOREACH(vcpu) {
  31             trace_event_set_vcpu_state_dynamic(vcpu, ev, state);
  32         }
  33     } else {
  34         TraceEventID id = trace_event_get_id(ev);
  35         trace_events_enabled_count += state - trace_events_dstate[id];
  36         trace_events_dstate[id] = state;
  37     }
  38 }
  39
  40 void trace_event_set_vcpu_state_dynamic(CPUState *vcpu,
  41                                         TraceEvent *ev, bool state)
  42 {
  43     TraceEventID id;
  44     TraceEventVCPUID vcpu_id;
  45     bool state_pre;
  46     assert(trace_event_get_state_static(ev));
  47     assert(trace_event_is_vcpu(ev));
  48     id = trace_event_get_id(ev);
  49     vcpu_id = trace_event_get_vcpu_id(ev);
  50     state_pre = test_bit(vcpu_id, vcpu->trace_dstate);
  51     if (state_pre != state) {
  52         if (state) {
  53             trace_events_enabled_count++;
  54             set_bit(vcpu_id, vcpu->trace_dstate);
  55             trace_events_dstate[id]++;
  56         } else {
  57             trace_events_enabled_count--;
  58             clear_bit(vcpu_id, vcpu->trace_dstate);
  59             trace_events_dstate[id]--;
  60         }
  61     }
  62 }