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 uint16_t trace_events_dstate[];
  20 extern int trace_events_enabled_count;
  21
  22
  23 static inline bool trace_event_is_pattern(const char *str)
  24 {
  25     assert(str != NULL);
  26     return strchr(str, '*') != NULL;
  27 }
  28
  29 static inline TraceEventID trace_event_get_id(TraceEvent *ev)
  30 {
  31     assert(ev != NULL);
  32     return ev->id;
  33 }
  34
  35 static inline TraceEventVCPUID trace_event_get_vcpu_id(TraceEvent *ev)
  36 {
  37     return ev->vcpu_id;
  38 }
  39
  40 static inline bool trace_event_is_vcpu(TraceEvent *ev)
  41 {
  42     return ev->vcpu_id != TRACE_VCPU_EVENT_COUNT;
  43 }
  44
  45 static inline const char * trace_event_get_name(TraceEvent *ev)
  46 {
  47     assert(ev != NULL);
  48     return ev->name;
  49 }
  50
  51 static inline bool trace_event_get_state_static(TraceEvent *ev)
  52 {
  53     assert(ev != NULL);
  54     return ev->sstate;
  55 }
  56
  57 static inline bool trace_event_get_state_dynamic_by_id(TraceEventID id)
  58 {
  59     /* it's on fast path, avoid consistency checks (asserts) */
  60     return unlikely(trace_events_enabled_count) && trace_events_dstate[id];
  61 }
  62
  63 static inline bool trace_event_get_state_dynamic(TraceEvent *ev)
  64 {
  65     TraceEventID id;
  66     assert(trace_event_get_state_static(ev));
  67     id = trace_event_get_id(ev);
  68     return trace_event_get_state_dynamic_by_id(id);
  69 }
  70
  71 static inline bool trace_event_get_vcpu_state_dynamic_by_vcpu_id(CPUState *vcpu,
  72                                                                  TraceEventVCPUID id)
  73 {
  74     /* it's on fast path, avoid consistency checks (asserts) */
  75     if (unlikely(trace_events_enabled_count)) {
  76         return test_bit(id, vcpu->trace_dstate);
  77     } else {
  78         return false;
  79     }
  80 }
  81
  82 static inline bool trace_event_get_vcpu_state_dynamic(CPUState *vcpu,
  83                                                       TraceEvent *ev)
  84 {
  85     TraceEventVCPUID id;
  86     assert(trace_event_is_vcpu(ev));
  87     id = trace_event_get_vcpu_id(ev);
  88     return trace_event_get_vcpu_state_dynamic_by_vcpu_id(vcpu, id);
  89 }
  90
  91 #endif /* TRACE__CONTROL_INTERNAL_H */