2 * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
3 * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
4 * David Goulet <david.goulet@polymtl.ca>
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.
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
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.
20 #ifndef _LTTNG_KERNEL_H
21 #define _LTTNG_KERNEL_H
24 #include <common/macros.h>
26 #define LTTNG_KERNEL_SYM_NAME_LEN 256
29 * LTTng DebugFS ABI structures.
31 * This is the kernel ABI copied from lttng-modules tree.
34 enum lttng_kernel_instrumentation
{
35 LTTNG_KERNEL_ALL
= -1, /* Used within lttng-tools */
36 LTTNG_KERNEL_TRACEPOINT
= 0,
37 LTTNG_KERNEL_KPROBE
= 1,
38 LTTNG_KERNEL_FUNCTION
= 2,
39 LTTNG_KERNEL_KRETPROBE
= 3,
40 LTTNG_KERNEL_NOOP
= 4, /* not hooked */
41 LTTNG_KERNEL_SYSCALL
= 5,
44 enum lttng_kernel_context_type
{
45 LTTNG_KERNEL_CONTEXT_PID
= 0,
46 LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER
= 1,
47 LTTNG_KERNEL_CONTEXT_PROCNAME
= 2,
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 LTTNG_KERNEL_CONTEXT_HOSTNAME
= 10,
58 /* Perf counter attributes */
59 struct lttng_kernel_perf_counter_ctx
{
62 char name
[LTTNG_KERNEL_SYM_NAME_LEN
];
65 /* Event/Channel context */
66 #define LTTNG_KERNEL_CONTEXT_PADDING1 16
67 #define LTTNG_KERNEL_CONTEXT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
68 struct lttng_kernel_context
{
69 enum lttng_kernel_context_type ctx
;
70 char padding
[LTTNG_KERNEL_CONTEXT_PADDING1
];
73 struct lttng_kernel_perf_counter_ctx perf_counter
;
74 char padding
[LTTNG_KERNEL_CONTEXT_PADDING2
];
78 struct lttng_kernel_kretprobe
{
82 char symbol_name
[LTTNG_KERNEL_SYM_NAME_LEN
];
86 * Either addr is used, or symbol_name and offset.
88 struct lttng_kernel_kprobe
{
92 char symbol_name
[LTTNG_KERNEL_SYM_NAME_LEN
];
96 struct lttng_kernel_function
{
97 char symbol_name
[LTTNG_KERNEL_SYM_NAME_LEN
];
100 struct lttng_kernel_syscall
{
102 } __attribute__((packed
));
104 #define LTTNG_KERNEL_EVENT_PADDING1 16
105 #define LTTNG_KERNEL_EVENT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
106 struct lttng_kernel_event
{
107 char name
[LTTNG_KERNEL_SYM_NAME_LEN
];
108 enum lttng_kernel_instrumentation instrumentation
;
109 char padding
[LTTNG_KERNEL_EVENT_PADDING1
];
111 /* Per instrumentation type configuration */
113 struct lttng_kernel_kretprobe kretprobe
;
114 struct lttng_kernel_kprobe kprobe
;
115 struct lttng_kernel_function ftrace
;
116 struct lttng_kernel_syscall syscall
;
117 char padding
[LTTNG_KERNEL_EVENT_PADDING2
];
121 struct lttng_kernel_tracer_version
{
127 enum lttng_kernel_calibrate_type
{
128 LTTNG_KERNEL_CALIBRATE_KRETPROBE
,
131 struct lttng_kernel_calibrate
{
132 enum lttng_kernel_calibrate_type type
; /* type (input) */
135 struct lttng_kernel_syscall_mask
{
136 uint32_t len
; /* in bits */
143 #define LTTNG_KERNEL_CHANNEL_PADDING1 LTTNG_SYMBOL_NAME_LEN + 32
144 struct lttng_kernel_channel
{
145 uint64_t subbuf_size
; /* bytes */
146 uint64_t num_subbuf
; /* power of 2 */
147 unsigned int switch_timer_interval
; /* usec */
148 unsigned int read_timer_interval
; /* usec */
149 enum lttng_event_output output
; /* splice, mmap */
151 int overwrite
; /* 1: overwrite, 0: discard */
152 char padding
[LTTNG_KERNEL_CHANNEL_PADDING1
];
155 #endif /* _LTTNG_KERNEL_H */