LXR qemu/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
  18extern TraceEvent trace_events[];
  19extern uint16_t trace_events_dstate[];
  20extern int trace_events_enabled_count;
  21
  22
  23static inline TraceEventID trace_event_count(void)
  24{
  25    return TRACE_EVENT_COUNT;
  26}
  27
  28static inline TraceEvent *trace_event_id(TraceEventID id)
  29{
  30    assert(id < trace_event_count());
  31    return &trace_events[id];
  32}
  33
  34static inline bool trace_event_is_pattern(const char *str)
  35{
  36    assert(str != NULL);
  37    return strchr(str, '*') != NULL;
  38}
  39
  40static inline TraceEventID trace_event_get_id(TraceEvent *ev)
  41{
  42    assert(ev != NULL);
  43    return ev->id;
  44}
  45
  46static inline TraceEventVCPUID trace_event_get_vcpu_id(TraceEvent *ev)
  47{
  48    return ev->vcpu_id;
  49}
  50
  51static inline bool trace_event_is_vcpu(TraceEvent *ev)
  52{
  53    return ev->vcpu_id != TRACE_VCPU_EVENT_COUNT;
  54}
  55
  56static inline const char * trace_event_get_name(TraceEvent *ev)
  57{
  58    assert(ev != NULL);
  59    return ev->name;
  60}
  61
  62static inline bool trace_event_get_state_static(TraceEvent *ev)
  63{
  64    assert(ev != NULL);
  65    return ev->sstate;
  66}
  67
  68static inline bool trace_event_get_state_dynamic_by_id(TraceEventID id)
  69{
  70    /* it's on fast path, avoid consistency checks (asserts) */
  71    return unlikely(trace_events_enabled_count) && trace_events_dstate[id];
  72}
  73
  74static inline bool trace_event_get_state_dynamic(TraceEvent *ev)
  75{
  76    TraceEventID id;
  77    assert(trace_event_get_state_static(ev));
  78    id = trace_event_get_id(ev);
  79    return trace_event_get_state_dynamic_by_id(id);
  80}
  81
  82static inline bool trace_event_get_vcpu_state_dynamic_by_vcpu_id(CPUState *vcpu,
  83                                                                 TraceEventVCPUID id)
  84{
  85    /* it's on fast path, avoid consistency checks (asserts) */
  86    if (unlikely(trace_events_enabled_count)) {
  87        return test_bit(id, vcpu->trace_dstate);
  88    } else {
  89        return false;
  90    }
  91}
  92
  93static inline bool trace_event_get_vcpu_state_dynamic(CPUState *vcpu,
  94                                                      TraceEvent *ev)
  95{
  96    TraceEventVCPUID id;
  97    assert(trace_event_is_vcpu(ev));
  98    id = trace_event_get_vcpu_id(ev);
  99    return trace_event_get_vcpu_state_dynamic_by_vcpu_id(vcpu, id);
 100}
 101
 102#endif /* TRACE__CONTROL_INTERNAL_H */
 103