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 int trace_events_enabled_count;
  19
  20
  21 static inline bool trace_event_is_pattern(const char *str)
  22 {
  23     assert(str != NULL);
  24     return strchr(str, '*') != NULL;
  25 }
  26
  27 static inline uint32_t trace_event_get_id(TraceEvent *ev)
  28 {
  29     assert(ev != NULL);
  30     return ev->id;
  31 }
  32
  33 static inline uint32_t trace_event_get_vcpu_id(TraceEvent *ev)
  34 {
  35     return ev->vcpu_id;
  36 }
  37
  38 static inline bool trace_event_is_vcpu(TraceEvent *ev)
  39 {
  40     return ev->vcpu_id != TRACE_VCPU_EVENT_NONE;
  41 }
  42
  43 static inline const char * trace_event_get_name(TraceEvent *ev)
  44 {
  45     assert(ev != NULL);
  46     return ev->name;
  47 }
  48
  49 static inline bool trace_event_get_state_static(TraceEvent *ev)
  50 {
  51     assert(ev != NULL);
  52     return ev->sstate;
  53 }
  54
  55 /* it's on fast path, avoid consistency checks (asserts) */
  56 #define trace_event_get_state_dynamic_by_id(id) \
  57     (unlikely(trace_events_enabled_count) && _ ## id ## _DSTATE)
  58
  59 static inline bool trace_event_get_state_dynamic(TraceEvent *ev)
  60 {
  61     return unlikely(trace_events_enabled_count) && *ev->dstate;
  62 }
  63
  64 static inline bool
  65 trace_event_get_vcpu_state_dynamic_by_vcpu_id(CPUState *vcpu,
  66                                               uint32_t vcpu_id)
  67 {
  68     /* it's on fast path, avoid consistency checks (asserts) */
  69     if (unlikely(trace_events_enabled_count)) {
  70         return test_bit(vcpu_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     uint32_t vcpu_id;
  80     assert(trace_event_is_vcpu(ev));
  81     vcpu_id = trace_event_get_vcpu_id(ev);
  82     return trace_event_get_vcpu_state_dynamic_by_vcpu_id(vcpu, vcpu_id);
  83 }
  84
  85
  86 void trace_event_register_group(TraceEvent **events);
  87
  88 #endif /* TRACE__CONTROL_INTERNAL_H */