Update lttng.h with padding
[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 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
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8 * as published by the Free Software Foundation; only version 2
9 * of the License.
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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
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24#include <stdint.h>
25
57ab7638 26#define LTTNG_SYM_NAME_LEN 256
9cb98350 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 {
5f822d0a 35 LTTNG_KERNEL_ALL = -1, /* Used within lttng-tools */
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36 LTTNG_KERNEL_TRACEPOINT = 0,
37 LTTNG_KERNEL_KPROBE = 1,
38 LTTNG_KERNEL_FUNCTION = 2,
8f0d098b 39 LTTNG_KERNEL_KRETPROBE = 3,
0133c199 40 LTTNG_KERNEL_NOOP = 4, /* not hooked */
a54bd42d 41 LTTNG_KERNEL_SYSCALL = 5,
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42};
43
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44enum lttng_kernel_context_type {
45 LTTNG_KERNEL_CONTEXT_PID = 0,
46 LTTNG_KERNEL_CONTEXT_PERF_COUNTER = 1,
9197c5c4 47 LTTNG_KERNEL_CONTEXT_PROCNAME = 2,
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48 LTTNG_KERNEL_CONTEXT_PRIO = 3,
49 LTTNG_KERNEL_CONTEXT_NICE = 4,
50 LTTNG_KERNEL_CONTEXT_VPID = 5,
51 LTTNG_KERNEL_CONTEXT_TID = 6,
52 LTTNG_KERNEL_CONTEXT_VTID = 7,
53 LTTNG_KERNEL_CONTEXT_PPID = 8,
54 LTTNG_KERNEL_CONTEXT_VPPID = 9,
55};
56
57/* Perf counter attributes */
58struct lttng_kernel_perf_counter_ctx {
59 uint32_t type;
60 uint64_t config;
e848fc76 61 char name[LTTNG_SYM_NAME_LEN];
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62};
63
64/* Event/Channel context */
65struct lttng_kernel_context {
66 enum lttng_kernel_context_type ctx;
67 union {
68 struct lttng_kernel_perf_counter_ctx perf_counter;
69 } u;
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70};
71
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72struct lttng_kernel_kretprobe {
73 uint64_t addr;
74
75 uint64_t offset;
76 char symbol_name[LTTNG_SYM_NAME_LEN];
77};
78
93128a92 79/*
7d29a247 80 * Either addr is used, or symbol_name and offset.
93128a92 81 */
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82struct lttng_kernel_kprobe {
83 uint64_t addr;
84
85 uint64_t offset;
86 char symbol_name[LTTNG_SYM_NAME_LEN];
87};
9cb98350 88
f05b5f07 89/* Function tracer */
7d29a247 90struct lttng_kernel_function {
9cb98350 91 char symbol_name[LTTNG_SYM_NAME_LEN];
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92};
93
9cb98350 94struct lttng_kernel_event {
f3ed775e 95 char name[LTTNG_SYM_NAME_LEN];
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96 enum lttng_kernel_instrumentation instrumentation;
97 /* Per instrumentation type configuration */
98 union {
8f0d098b 99 struct lttng_kernel_kretprobe kretprobe;
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100 struct lttng_kernel_kprobe kprobe;
101 struct lttng_kernel_function ftrace;
9cb98350 102 } u;
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103};
104
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105struct lttng_kernel_tracer_version {
106 uint32_t version;
107 uint32_t patchlevel;
108 uint32_t sublevel;
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109};
110
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111enum lttng_kernel_calibrate_type {
112 LTTNG_KERNEL_CALIBRATE_KRETPROBE,
113};
114
115struct lttng_kernel_calibrate {
116 enum lttng_kernel_calibrate_type type; /* type (input) */
117};
118
93128a92 119#endif /* _LTTNG_KERNEL_H */
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