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 int trace_events_enabled_count;
  19
  20
  21static inline bool trace_event_is_pattern(const char *str)
  22{
  23    assert(str != NULL);
  24    return strchr(str, '*') != NULL;
  25}
  26
  27static inline uint32_t trace_event_get_id(TraceEvent *ev)
  28{
  29    assert(ev != NULL);
  30    return ev->id;
  31}
  32
  33static inline uint32_t trace_event_get_vcpu_id(TraceEvent *ev)
  34{
  35    return ev->vcpu_id;
  36}
  37
  38static inline bool trace_event_is_vcpu(TraceEvent *ev)
  39{
  40    return ev->vcpu_id != TRACE_VCPU_EVENT_NONE;
  41}
  42
  43static inline const char * trace_event_get_name(TraceEvent *ev)
  44{
  45    assert(ev != NULL);
  46    return ev->name;
  47}
  48
  49static 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
  59static inline bool trace_event_get_state_dynamic(TraceEvent *ev)
  60{
  61    return unlikely(trace_events_enabled_count) && *ev->dstate;
  62}
  63
  64static inline bool
  65trace_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
  76static 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
  86void trace_event_register_group(TraceEvent **events);
  87
  88#endif /* TRACE__CONTROL_INTERNAL_H */
  89