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>
25 #include <lttng/constant.h>
26 #include <lttng/event.h>
28 #define LTTNG_KERNEL_SYM_NAME_LEN 256
29 #define LTTNG_KERNEL_MAX_UPROBE_NUM 32
32 * LTTng DebugFS ABI structures.
34 * This is the kernel ABI copied from lttng-modules tree.
37 enum lttng_kernel_instrumentation
{
38 LTTNG_KERNEL_ALL
= -1, /* Used within lttng-tools */
39 LTTNG_KERNEL_TRACEPOINT
= 0,
40 LTTNG_KERNEL_KPROBE
= 1,
41 LTTNG_KERNEL_FUNCTION
= 2,
42 LTTNG_KERNEL_KRETPROBE
= 3,
43 LTTNG_KERNEL_NOOP
= 4, /* not hooked */
44 LTTNG_KERNEL_SYSCALL
= 5,
47 enum lttng_kernel_context_type
{
48 LTTNG_KERNEL_CONTEXT_PID
= 0,
49 LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER
= 1,
50 LTTNG_KERNEL_CONTEXT_PROCNAME
= 2,
51 LTTNG_KERNEL_CONTEXT_PRIO
= 3,
52 LTTNG_KERNEL_CONTEXT_NICE
= 4,
53 LTTNG_KERNEL_CONTEXT_VPID
= 5,
54 LTTNG_KERNEL_CONTEXT_TID
= 6,
55 LTTNG_KERNEL_CONTEXT_VTID
= 7,
56 LTTNG_KERNEL_CONTEXT_PPID
= 8,
57 LTTNG_KERNEL_CONTEXT_VPPID
= 9,
58 LTTNG_KERNEL_CONTEXT_HOSTNAME
= 10,
59 LTTNG_KERNEL_CONTEXT_CPU_ID
= 11,
60 LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE
= 12,
61 LTTNG_KERNEL_CONTEXT_PREEMPTIBLE
= 13,
62 LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE
= 14,
63 LTTNG_KERNEL_CONTEXT_MIGRATABLE
= 15,
64 LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL
= 16,
65 LTTNG_KERNEL_CONTEXT_CALLSTACK_USER
= 17,
68 /* Perf counter attributes */
69 struct lttng_kernel_perf_counter_ctx
{
72 char name
[LTTNG_KERNEL_SYM_NAME_LEN
];
75 /* Event/Channel context */
76 #define LTTNG_KERNEL_CONTEXT_PADDING1 16
77 #define LTTNG_KERNEL_CONTEXT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
78 struct lttng_kernel_context
{
79 enum lttng_kernel_context_type ctx
;
80 char padding
[LTTNG_KERNEL_CONTEXT_PADDING1
];
83 struct lttng_kernel_perf_counter_ctx perf_counter
;
84 char padding
[LTTNG_KERNEL_CONTEXT_PADDING2
];
88 struct lttng_kernel_kretprobe
{
92 char symbol_name
[LTTNG_KERNEL_SYM_NAME_LEN
];
96 * Either addr is used, or symbol_name and offset.
98 struct lttng_kernel_kprobe
{
102 char symbol_name
[LTTNG_KERNEL_SYM_NAME_LEN
];
105 /* Function tracer */
106 struct lttng_kernel_function
{
107 char symbol_name
[LTTNG_KERNEL_SYM_NAME_LEN
];
110 #define LTTNG_KERNEL_EVENT_PADDING1 16
111 #define LTTNG_KERNEL_EVENT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
112 struct lttng_kernel_event
{
113 char name
[LTTNG_KERNEL_SYM_NAME_LEN
];
114 enum lttng_kernel_instrumentation instrumentation
;
115 char padding
[LTTNG_KERNEL_EVENT_PADDING1
];
117 /* Per instrumentation type configuration */
119 struct lttng_kernel_kretprobe kretprobe
;
120 struct lttng_kernel_kprobe kprobe
;
121 struct lttng_kernel_function ftrace
;
122 char padding
[LTTNG_KERNEL_EVENT_PADDING2
];
126 struct lttng_kernel_tracer_version
{
132 struct lttng_kernel_tracer_abi_version
{
137 struct lttng_kernel_syscall_mask
{
138 uint32_t len
; /* in bits */
145 #define LTTNG_KERNEL_CHANNEL_PADDING1 LTTNG_SYMBOL_NAME_LEN + 32
146 struct lttng_kernel_channel
{
147 uint64_t subbuf_size
; /* bytes */
148 uint64_t num_subbuf
; /* power of 2 */
149 unsigned int switch_timer_interval
; /* usec */
150 unsigned int read_timer_interval
; /* usec */
151 enum lttng_event_output output
; /* splice, mmap */
153 int overwrite
; /* 1: overwrite, 0: discard */
154 char padding
[LTTNG_KERNEL_CHANNEL_PADDING1
];
157 #define KERNEL_FILTER_BYTECODE_MAX_LEN 65536
158 struct lttng_kernel_filter_bytecode
{
160 uint32_t reloc_offset
;
165 #endif /* _LTTNG_KERNEL_H */