trace/control-internal.h


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86

/*
 * Interface for configuring and controlling the state of tracing events.
 *
 * Copyright (C) 2011-2016 Lluís Vilanova <vilanova@ac.upc.edu>
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or later.
 * See the COPYING file in the top-level directory.
 */

#ifndef TRACE__CONTROL_INTERNAL_H
#define TRACE__CONTROL_INTERNAL_H

#include "qom/cpu.h"


extern int trace_events_enabled_count;


static inline bool trace_event_is_pattern(const char *str)
{
    assert(str != NULL);
    return strchr(str, '*') != NULL;
}

static inline uint32_t trace_event_get_id(TraceEvent *ev)
{
    assert(ev != NULL);
    return ev->id;
}

static inline uint32_t trace_event_get_vcpu_id(TraceEvent *ev)
{
    return ev->vcpu_id;
}

static inline bool trace_event_is_vcpu(TraceEvent *ev)
{
    return ev->vcpu_id != TRACE_VCPU_EVENT_NONE;
}

static inline const char * trace_event_get_name(TraceEvent *ev)
{
    assert(ev != NULL);
    return ev->name;
}

static inline bool trace_event_get_state_static(TraceEvent *ev)
{
    assert(ev != NULL);
    return ev->sstate;
}

/* it's on fast path, avoid consistency checks (asserts) */
#define trace_event_get_state_dynamic_by_id(id) \
    (unlikely(trace_events_enabled_count) && _ ## id ## _DSTATE)

static inline bool trace_event_get_state_dynamic(TraceEvent *ev)
{
    return unlikely(trace_events_enabled_count) && *ev->dstate;
}

static inline bool
trace_event_get_vcpu_state_dynamic_by_vcpu_id(CPUState *vcpu,
                                              uint32_t vcpu_id)
{
    /* it's on fast path, avoid consistency checks (asserts) */
    if (unlikely(trace_events_enabled_count)) {
        return test_bit(vcpu_id, vcpu->trace_dstate);
    } else {
        return false;
    }
}

static inline bool trace_event_get_vcpu_state_dynamic(CPUState *vcpu,
                                                      TraceEvent *ev)
{
    uint32_t vcpu_id;
    assert(trace_event_is_vcpu(ev));
    vcpu_id = trace_event_get_vcpu_id(ev);
    return trace_event_get_vcpu_state_dynamic_by_vcpu_id(vcpu, vcpu_id);
}


void trace_event_register_group(TraceEvent **events);

#endif /* TRACE__CONTROL_INTERNAL_H */