trace/control-internal.h

   1 /*
   2  * Interface for configuring and controlling the state of tracing events.
   3  *
   4  * Copyright (C) 2011-2016 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 #ifndef TRACE__CONTROL_INTERNAL_H
  11 #define TRACE__CONTROL_INTERNAL_H
  12
  13 #include <stddef.h>                     /* size_t */
  14
  15 #include "qom/cpu.h"
  16
  17
  18 extern TraceEvent trace_events[];
  19 extern int trace_events_enabled_count;
  20
  21
  22 static inline bool trace_event_is_pattern(const char *str)
  23 {
  24     assert(str != NULL);
  25     return strchr(str, '*') != NULL;
  26 }
  27
  28 static inline TraceEventID trace_event_get_id(TraceEvent *ev)
  29 {
  30     assert(ev != NULL);
  31     return ev->id;
  32 }
  33
  34 static inline TraceEventVCPUID trace_event_get_vcpu_id(TraceEvent *ev)
  35 {
  36     return ev->vcpu_id;
  37 }
  38
  39 static inline bool trace_event_is_vcpu(TraceEvent *ev)
  40 {
  41     return ev->vcpu_id != TRACE_VCPU_EVENT_COUNT;
  42 }
  43
  44 static inline const char * trace_event_get_name(TraceEvent *ev)
  45 {
  46     assert(ev != NULL);
  47     return ev->name;
  48 }
  49
  50 static inline bool trace_event_get_state_static(TraceEvent *ev)
  51 {
  52     assert(ev != NULL);
  53     return ev->sstate;
  54 }
  55
  56 /* it's on fast path, avoid consistency checks (asserts) */
  57 #define trace_event_get_state_dynamic_by_id(id) \
  58     (unlikely(trace_events_enabled_count) && _ ## id ## _DSTATE)
  59
  60 static inline bool trace_event_get_state_dynamic(TraceEvent *ev)
  61 {
  62     return unlikely(trace_events_enabled_count) && *ev->dstate;
  63 }
  64
  65 static inline bool trace_event_get_vcpu_state_dynamic_by_vcpu_id(CPUState *vcpu,
  66                                                                  TraceEventVCPUID id)
  67 {
  68     /* it's on fast path, avoid consistency checks (asserts) */
  69     if (unlikely(trace_events_enabled_count)) {
  70         return test_bit(id, vcpu->trace_dstate);
  71     } else {
  72         return false;
  73     }
  74 }
  75
  76 static inline bool trace_event_get_vcpu_state_dynamic(CPUState *vcpu,
  77                                                       TraceEvent *ev)
  78 {
  79     TraceEventVCPUID id;
  80     assert(trace_event_is_vcpu(ev));
  81     id = trace_event_get_vcpu_id(ev);
  82     return trace_event_get_vcpu_state_dynamic_by_vcpu_id(vcpu, id);
  83 }
  84
  85 #endif /* TRACE__CONTROL_INTERNAL_H */