-
Notifications
You must be signed in to change notification settings - Fork 5
/
h2olog.h
80 lines (67 loc) · 2.2 KB
/
h2olog.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
/*
* Copyright (c) 2019-2020 Fastly, Inc., Toru Maesaka
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#ifndef h2olog_h
#define h2olog_h
#include <cinttypes>
#include <vector>
#include <bcc/BPF.h>
struct st_h2o_tracer_t;
typedef struct st_h2o_tracer_t h2o_tracer_t;
struct st_h2o_tracer_t {
/*
* Where to output the results. Defaults to `stdout`.
*/
FILE *out;
/*
* The number of events emitted in `handle_event`.
*/
uint64_t count;
/*
* The number of lost events. It is reset periodically.
*/
uint64_t lost_count;
/*
* Handles an incoming BPF event.
*/
void (*handle_event)(h2o_tracer_t *tracer, const void *data, int len);
/*
* Handles an event data lost.
*/
void (*handle_lost)(h2o_tracer_t *tracer, uint64_t lost);
/*
* Returns a vector of relevant USDT probes.
*/
std::vector<ebpf::USDT> (*init_usdt_probes)(pid_t h2o_pid);
/*
* Returns the code to be compiled into BPF bytecode.
*/
const char *(*bpf_text)(void);
};
/*
* Initialize an HTTP tracer.
*/
void init_http_tracer(h2o_tracer_t *);
/*
* Initialize a QUIC tracer.
*/
void init_quic_tracer(h2o_tracer_t *);
#endif