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 "qom/cpu.h"
  14
  15
  16 extern int trace_events_enabled_count;
  17
  18
  19 static inline bool trace_event_is_pattern(const char *str)
  20 {
  21     assert(str != NULL);
  22     return strchr(str, '*') != NULL;
  23 }
  24
  25 static inline uint32_t trace_event_get_id(TraceEvent *ev)
  26 {
  27     assert(ev != NULL);
  28     return ev->id;
  29 }
  30
  31 static inline uint32_t trace_event_get_vcpu_id(TraceEvent *ev)
  32 {
  33     return ev->vcpu_id;
  34 }
  35
  36 static inline bool trace_event_is_vcpu(TraceEvent *ev)
  37 {
  38     return ev->vcpu_id != TRACE_VCPU_EVENT_NONE;
  39 }
  40
  41 static inline const char * trace_event_get_name(TraceEvent *ev)
  42 {
  43     assert(ev != NULL);
  44     return ev->name;
  45 }
  46
  47 static inline bool trace_event_get_state_static(TraceEvent *ev)
  48 {
  49     assert(ev != NULL);
  50     return ev->sstate;
  51 }
  52
  53 /* it's on fast path, avoid consistency checks (asserts) */
  54 #define trace_event_get_state_dynamic_by_id(id) \
  55     (unlikely(trace_events_enabled_count) && _ ## id ## _DSTATE)
  56
  57 static inline bool trace_event_get_state_dynamic(TraceEvent *ev)
  58 {
  59     return unlikely(trace_events_enabled_count) && *ev->dstate;
  60 }
  61
  62 static inline bool
  63 trace_event_get_vcpu_state_dynamic_by_vcpu_id(CPUState *vcpu,
  64                                               uint32_t vcpu_id)
  65 {
  66     /* it's on fast path, avoid consistency checks (asserts) */
  67     if (unlikely(trace_events_enabled_count)) {
  68         return test_bit(vcpu_id, vcpu->trace_dstate);
  69     } else {
  70         return false;
  71     }
  72 }
  73
  74 static inline bool trace_event_get_vcpu_state_dynamic(CPUState *vcpu,
  75                                                       TraceEvent *ev)
  76 {
  77     uint32_t vcpu_id;
  78     assert(trace_event_is_vcpu(ev));
  79     vcpu_id = trace_event_get_vcpu_id(ev);
  80     return trace_event_get_vcpu_state_dynamic_by_vcpu_id(vcpu, vcpu_id);
  81 }
  82
  83
  84 void trace_event_register_group(TraceEvent **events);
  85
  86 #endif /* TRACE__CONTROL_INTERNAL_H */