Minor fixes to header files
[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; only version 2
9 * of the License.
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 <stdint.h>
25
26 #include <lttng-share.h>
27
28 #define LTTNG_SYM_NAME_LEN 128
29
30 /*
31 * LTTng DebugFS ABI structures.
32 *
33 * This is the kernel ABI copied from lttng-modules tree.
34 */
35
36 enum lttng_kernel_instrumentation {
37 LTTNG_KERNEL_TRACEPOINT = 0,
38 LTTNG_KERNEL_KPROBE = 1,
39 LTTNG_KERNEL_FUNCTION = 2,
40 LTTNG_KERNEL_KRETPROBE = 3,
41 };
42
43 enum lttng_kernel_context_type {
44 LTTNG_KERNEL_CONTEXT_PID = 0,
45 LTTNG_KERNEL_CONTEXT_PERF_COUNTER = 1,
46 LTTNG_KERNEL_CONTEXT_COMM = 2,
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,
54 };
55
56 /* Perf counter attributes */
57 struct lttng_kernel_perf_counter_ctx {
58 uint32_t type;
59 uint64_t config;
60 char name[LTTNG_SYM_NAME_LEN];
61 };
62
63 /* Event/Channel context */
64 struct lttng_kernel_context {
65 enum lttng_kernel_context_type ctx;
66 union {
67 struct lttng_kernel_perf_counter_ctx perf_counter;
68 } u;
69 };
70
71 struct lttng_kernel_kretprobe {
72 uint64_t addr;
73
74 uint64_t offset;
75 char symbol_name[LTTNG_SYM_NAME_LEN];
76 };
77
78 /*
79 * Either addr is used, or symbol_name and offset.
80 */
81 struct lttng_kernel_kprobe {
82 uint64_t addr;
83
84 uint64_t offset;
85 char symbol_name[LTTNG_SYM_NAME_LEN];
86 };
87
88 /* Function tracer */
89 struct lttng_kernel_function {
90 char symbol_name[LTTNG_SYM_NAME_LEN];
91 };
92
93 struct lttng_kernel_event {
94 char name[LTTNG_SYM_NAME_LEN];
95 enum lttng_kernel_instrumentation instrumentation;
96 /* Per instrumentation type configuration */
97 union {
98 struct lttng_kernel_kretprobe kretprobe;
99 struct lttng_kernel_kprobe kprobe;
100 struct lttng_kernel_function ftrace;
101 } u;
102 };
103
104 struct lttng_kernel_tracer_version {
105 uint32_t version;
106 uint32_t patchlevel;
107 uint32_t sublevel;
108 };
109
110 enum lttng_kernel_calibrate_type {
111 LTTNG_KERNEL_CALIBRATE_KRETPROBE,
112 };
113
114 struct lttng_kernel_calibrate {
115 enum lttng_kernel_calibrate_type type; /* type (input) */
116 };
117
118 #endif /* _LTTNG_KERNEL_H */
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