Fix tracing events data structure
[lttng-tools.git] / include / lttng-kernel.h
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
24 #include "lttng-share.h"
25
26 #define LTTNG_SYM_NAME_LEN 128
27
28 enum lttng_kernel_instrumentation {
29 LTTNG_KERNEL_TRACEPOINT = 0,
30 LTTNG_KERNEL_KPROBE = 1,
31 LTTNG_KERNEL_FUNCTION = 2,
32 };
33
34 /*
35 * LTTng consumer mode
36 */
37 enum lttng_kernel_output {
38 LTTNG_KERNEL_SPLICE = 0,
39 LTTNG_KERNEL_MMAP = 1,
40 };
41
42 /*
43 * LTTng DebugFS ABI structures.
44 *
45 * This is the kernel ABI copied from lttng-modules tree.
46 */
47
48 /* Either addr is used or symbol_name and offset. */
49 struct lttng_kernel_kprobe {
50 uint64_t addr;
51
52 uint64_t offset;
53 char symbol_name[LTTNG_SYM_NAME_LEN];
54 };
55
56 struct lttng_kernel_function_tracer {
57 char symbol_name[LTTNG_SYM_NAME_LEN];
58 };
59
60 struct lttng_kernel_event {
61 char name[LTTNG_SYM_NAME_LEN];
62 enum lttng_kernel_instrumentation instrumentation;
63 /* Per instrumentation type configuration */
64 union {
65 struct lttng_kernel_kprobe kprobe;
66 struct lttng_kernel_function_tracer ftrace;
67 } u;
68 };
69
70 struct lttng_kernel_tracer_version {
71 uint32_t version;
72 uint32_t patchlevel;
73 uint32_t sublevel;
74 };
75
76 #endif /* _LTTNG_KERNEL_H */
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