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 "qom/cpu.h"
  14
  15
  16extern int trace_events_enabled_count;
  17
  18
  19static inline bool trace_event_is_pattern(const char *str)
  20{
  21    assert(str != NULL);
  22    return strchr(str, '*') != NULL;
  23}
  24
  25static inline uint32_t trace_event_get_id(TraceEvent *ev)
  26{
  27    assert(ev != NULL);
  28    return ev->id;
  29}
  30
  31static inline uint32_t trace_event_get_vcpu_id(TraceEvent *ev)
  32{
  33    return ev->vcpu_id;
  34}
  35
  36static inline bool trace_event_is_vcpu(TraceEvent *ev)
  37{
  38    return ev->vcpu_id != TRACE_VCPU_EVENT_NONE;
  39}
  40
  41static inline const char * trace_event_get_name(TraceEvent *ev)
  42{
  43    assert(ev != NULL);
  44    return ev->name;
  45}
  46
  47static 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
  57static inline bool trace_event_get_state_dynamic(TraceEvent *ev)
  58{
  59    return unlikely(trace_events_enabled_count) && *ev->dstate;
  60}
  61
  62static inline bool
  63trace_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
  74static 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
  84void trace_event_register_group(TraceEvent **events);
  85
  86#endif /* TRACE__CONTROL_INTERNAL_H */
  87