Change lttng.h API char to const char
[lttng-tools.git] / include / lttng-kernel.h
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1/*
2 * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
3 * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
4 * David Goulet <david.goulet@polymtl.ca>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 */
20
21#ifndef _LTTNG_KERNEL_H
22#define _LTTNG_KERNEL_H
23
9bda164d 24#include "lttng-share.h"
93128a92 25
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26#define LTTNG_SYM_NAME_LEN 128
27
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28/*
29 * LTTng DebugFS ABI structures.
30 *
31 * This is the kernel ABI copied from lttng-modules tree.
32 */
33
9cb98350 34enum lttng_kernel_instrumentation {
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35 LTTNG_KERNEL_TRACEPOINT = 0,
36 LTTNG_KERNEL_KPROBE = 1,
37 LTTNG_KERNEL_FUNCTION = 2,
38};
39
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40enum lttng_kernel_context_type {
41 LTTNG_KERNEL_CONTEXT_PID = 0,
42 LTTNG_KERNEL_CONTEXT_PERF_COUNTER = 1,
43 LTTNG_KERNEL_CONTEXT_COMM = 2,
44 LTTNG_KERNEL_CONTEXT_PRIO = 3,
45 LTTNG_KERNEL_CONTEXT_NICE = 4,
46 LTTNG_KERNEL_CONTEXT_VPID = 5,
47 LTTNG_KERNEL_CONTEXT_TID = 6,
48 LTTNG_KERNEL_CONTEXT_VTID = 7,
49 LTTNG_KERNEL_CONTEXT_PPID = 8,
50 LTTNG_KERNEL_CONTEXT_VPPID = 9,
51};
52
53/* Perf counter attributes */
54struct lttng_kernel_perf_counter_ctx {
55 uint32_t type;
56 uint64_t config;
57 char name[LTTNG_SYMBOL_NAME_LEN];
58};
59
60/* Event/Channel context */
61struct lttng_kernel_context {
62 enum lttng_kernel_context_type ctx;
63 union {
64 struct lttng_kernel_perf_counter_ctx perf_counter;
65 } u;
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66};
67
93128a92 68/*
7d29a247 69 * Either addr is used, or symbol_name and offset.
93128a92 70 */
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71struct lttng_kernel_kprobe {
72 uint64_t addr;
73
74 uint64_t offset;
75 char symbol_name[LTTNG_SYM_NAME_LEN];
76};
9cb98350 77
f05b5f07 78/* Function tracer */
7d29a247 79struct lttng_kernel_function {
9cb98350 80 char symbol_name[LTTNG_SYM_NAME_LEN];
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81};
82
9cb98350 83struct lttng_kernel_event {
f3ed775e 84 char name[LTTNG_SYM_NAME_LEN];
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85 enum lttng_kernel_instrumentation instrumentation;
86 /* Per instrumentation type configuration */
87 union {
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88 struct lttng_kernel_kprobe kprobe;
89 struct lttng_kernel_function ftrace;
9cb98350 90 } u;
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91};
92
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93struct lttng_kernel_tracer_version {
94 uint32_t version;
95 uint32_t patchlevel;
96 uint32_t sublevel;
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97};
98
99#endif /* _LTTNG_KERNEL_H */
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