Cleanup: use LTTNG_HIDDEN in src/common
[lttng-tools.git] / src / common / 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 *
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6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License, version 2 only,
8 * as published by the Free Software Foundation.
93128a92 9 *
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10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
93128a92 14 *
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15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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18 */
19
20#ifndef _LTTNG_KERNEL_H
21#define _LTTNG_KERNEL_H
22
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23#include <stdint.h>
24
dbbb3ec5 25#define LTTNG_KERNEL_SYM_NAME_LEN 256
9cb98350 26
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27/*
28 * LTTng DebugFS ABI structures.
29 *
30 * This is the kernel ABI copied from lttng-modules tree.
31 */
32
9cb98350 33enum lttng_kernel_instrumentation {
5f822d0a 34 LTTNG_KERNEL_ALL = -1, /* Used within lttng-tools */
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35 LTTNG_KERNEL_TRACEPOINT = 0,
36 LTTNG_KERNEL_KPROBE = 1,
37 LTTNG_KERNEL_FUNCTION = 2,
8f0d098b 38 LTTNG_KERNEL_KRETPROBE = 3,
0133c199 39 LTTNG_KERNEL_NOOP = 4, /* not hooked */
a54bd42d 40 LTTNG_KERNEL_SYSCALL = 5,
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41};
42
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43enum lttng_kernel_context_type {
44 LTTNG_KERNEL_CONTEXT_PID = 0,
45 LTTNG_KERNEL_CONTEXT_PERF_COUNTER = 1,
9197c5c4 46 LTTNG_KERNEL_CONTEXT_PROCNAME = 2,
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47 LTTNG_KERNEL_CONTEXT_PRIO = 3,
48 LTTNG_KERNEL_CONTEXT_NICE = 4,
49 LTTNG_KERNEL_CONTEXT_VPID = 5,
50 LTTNG_KERNEL_CONTEXT_TID = 6,
51 LTTNG_KERNEL_CONTEXT_VTID = 7,
52 LTTNG_KERNEL_CONTEXT_PPID = 8,
53 LTTNG_KERNEL_CONTEXT_VPPID = 9,
54773d68 54 LTTNG_KERNEL_CONTEXT_HOSTNAME = 10,
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55};
56
57/* Perf counter attributes */
58struct lttng_kernel_perf_counter_ctx {
59 uint32_t type;
60 uint64_t config;
dbbb3ec5 61 char name[LTTNG_KERNEL_SYM_NAME_LEN];
4dbc372b 62}__attribute__((packed));
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63
64/* Event/Channel context */
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65#define LTTNG_KERNEL_CONTEXT_PADDING1 16
66#define LTTNG_KERNEL_CONTEXT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
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67struct lttng_kernel_context {
68 enum lttng_kernel_context_type ctx;
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69 char padding[LTTNG_KERNEL_CONTEXT_PADDING1];
70
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71 union {
72 struct lttng_kernel_perf_counter_ctx perf_counter;
dbbb3ec5 73 char padding[LTTNG_KERNEL_CONTEXT_PADDING2];
7d29a247 74 } u;
4dbc372b 75}__attribute__((packed));
9cb98350 76
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77struct lttng_kernel_kretprobe {
78 uint64_t addr;
79
80 uint64_t offset;
dbbb3ec5 81 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
4dbc372b 82}__attribute__((packed));
8f0d098b 83
93128a92 84/*
7d29a247 85 * Either addr is used, or symbol_name and offset.
93128a92 86 */
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87struct lttng_kernel_kprobe {
88 uint64_t addr;
89
90 uint64_t offset;
dbbb3ec5 91 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
4dbc372b 92}__attribute__((packed));
9cb98350 93
f05b5f07 94/* Function tracer */
7d29a247 95struct lttng_kernel_function {
dbbb3ec5 96 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
4dbc372b 97}__attribute__((packed));
93128a92 98
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99#define LTTNG_KERNEL_EVENT_PADDING1 16
100#define LTTNG_KERNEL_EVENT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
9cb98350 101struct lttng_kernel_event {
dbbb3ec5 102 char name[LTTNG_KERNEL_SYM_NAME_LEN];
9cb98350 103 enum lttng_kernel_instrumentation instrumentation;
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104 char padding[LTTNG_KERNEL_EVENT_PADDING1];
105
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106 /* Per instrumentation type configuration */
107 union {
8f0d098b 108 struct lttng_kernel_kretprobe kretprobe;
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109 struct lttng_kernel_kprobe kprobe;
110 struct lttng_kernel_function ftrace;
dbbb3ec5 111 char padding[LTTNG_KERNEL_EVENT_PADDING2];
9cb98350 112 } u;
4dbc372b 113}__attribute__((packed));
93128a92 114
9cb98350 115struct lttng_kernel_tracer_version {
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116 uint32_t major;
117 uint32_t minor;
9cb98350 118 uint32_t patchlevel;
4dbc372b 119}__attribute__((packed));
93128a92 120
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121enum lttng_kernel_calibrate_type {
122 LTTNG_KERNEL_CALIBRATE_KRETPROBE,
123};
124
125struct lttng_kernel_calibrate {
126 enum lttng_kernel_calibrate_type type; /* type (input) */
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127}__attribute__((packed));
128
129/*
130 * kernel channel
131 */
132#define LTTNG_KERNEL_CHANNEL_PADDING1 LTTNG_SYMBOL_NAME_LEN + 32
133struct lttng_kernel_channel {
134 uint64_t subbuf_size; /* bytes */
135 uint64_t num_subbuf; /* power of 2 */
136 unsigned int switch_timer_interval; /* usec */
137 unsigned int read_timer_interval; /* usec */
138 enum lttng_event_output output; /* splice, mmap */
139
140 int overwrite; /* 1: overwrite, 0: discard */
141 char padding[LTTNG_KERNEL_CHANNEL_PADDING1];
142}__attribute__((packed));
d0254c7c 143
93128a92 144#endif /* _LTTNG_KERNEL_H */
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