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
30 #define LTTNG_KERNEL_SESSION_NAME_LEN 256
33 * LTTng DebugFS ABI structures.
35 * This is the kernel ABI copied from lttng-modules tree.
38 enum lttng_kernel_instrumentation
{
39 LTTNG_KERNEL_ALL
= -1, /* Used within lttng-tools */
40 LTTNG_KERNEL_TRACEPOINT
= 0,
41 LTTNG_KERNEL_KPROBE
= 1,
42 LTTNG_KERNEL_FUNCTION
= 2,
43 LTTNG_KERNEL_KRETPROBE
= 3,
44 LTTNG_KERNEL_NOOP
= 4, /* not hooked */
45 LTTNG_KERNEL_SYSCALL
= 5,
46 LTTNG_KERNEL_UPROBE
= 6,
49 enum lttng_kernel_context_type
{
50 LTTNG_KERNEL_CONTEXT_PID
= 0,
51 LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER
= 1,
52 LTTNG_KERNEL_CONTEXT_PROCNAME
= 2,
53 LTTNG_KERNEL_CONTEXT_PRIO
= 3,
54 LTTNG_KERNEL_CONTEXT_NICE
= 4,
55 LTTNG_KERNEL_CONTEXT_VPID
= 5,
56 LTTNG_KERNEL_CONTEXT_TID
= 6,
57 LTTNG_KERNEL_CONTEXT_VTID
= 7,
58 LTTNG_KERNEL_CONTEXT_PPID
= 8,
59 LTTNG_KERNEL_CONTEXT_VPPID
= 9,
60 LTTNG_KERNEL_CONTEXT_HOSTNAME
= 10,
61 LTTNG_KERNEL_CONTEXT_CPU_ID
= 11,
62 LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE
= 12,
63 LTTNG_KERNEL_CONTEXT_PREEMPTIBLE
= 13,
64 LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE
= 14,
65 LTTNG_KERNEL_CONTEXT_MIGRATABLE
= 15,
66 LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL
= 16,
67 LTTNG_KERNEL_CONTEXT_CALLSTACK_USER
= 17,
70 /* Perf counter attributes */
71 struct lttng_kernel_perf_counter_ctx
{
74 char name
[LTTNG_KERNEL_SYM_NAME_LEN
];
77 /* Event/Channel context */
78 #define LTTNG_KERNEL_CONTEXT_PADDING1 16
79 #define LTTNG_KERNEL_CONTEXT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
80 struct lttng_kernel_context
{
81 enum lttng_kernel_context_type ctx
;
82 char padding
[LTTNG_KERNEL_CONTEXT_PADDING1
];
85 struct lttng_kernel_perf_counter_ctx perf_counter
;
86 char padding
[LTTNG_KERNEL_CONTEXT_PADDING2
];
90 struct lttng_kernel_kretprobe
{
94 char symbol_name
[LTTNG_KERNEL_SYM_NAME_LEN
];
98 * Either addr is used, or symbol_name and offset.
100 struct lttng_kernel_kprobe
{
104 char symbol_name
[LTTNG_KERNEL_SYM_NAME_LEN
];
107 struct lttng_kernel_uprobe
{
111 struct lttng_kernel_event_callsite_uprobe
{
115 struct lttng_kernel_event_callsite
{
117 struct lttng_kernel_event_callsite_uprobe uprobe
;
121 /* Function tracer */
122 struct lttng_kernel_function
{
123 char symbol_name
[LTTNG_KERNEL_SYM_NAME_LEN
];
126 #define LTTNG_KERNEL_EVENT_PADDING1 16
127 #define LTTNG_KERNEL_EVENT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
128 struct lttng_kernel_event
{
129 char name
[LTTNG_KERNEL_SYM_NAME_LEN
];
130 enum lttng_kernel_instrumentation instrumentation
;
131 char padding
[LTTNG_KERNEL_EVENT_PADDING1
];
133 /* Per instrumentation type configuration */
135 struct lttng_kernel_kretprobe kretprobe
;
136 struct lttng_kernel_kprobe kprobe
;
137 struct lttng_kernel_uprobe uprobe
;
138 struct lttng_kernel_function ftrace
;
139 char padding
[LTTNG_KERNEL_EVENT_PADDING2
];
143 struct lttng_kernel_tracer_version
{
149 struct lttng_kernel_tracer_abi_version
{
154 struct lttng_kernel_syscall_mask
{
155 uint32_t len
; /* in bits */
162 #define LTTNG_KERNEL_CHANNEL_PADDING1 LTTNG_SYMBOL_NAME_LEN + 32
163 struct lttng_kernel_channel
{
164 uint64_t subbuf_size
; /* bytes */
165 uint64_t num_subbuf
; /* power of 2 */
166 unsigned int switch_timer_interval
; /* usec */
167 unsigned int read_timer_interval
; /* usec */
168 enum lttng_event_output output
; /* splice, mmap */
170 int overwrite
; /* 1: overwrite, 0: discard */
171 char padding
[LTTNG_KERNEL_CHANNEL_PADDING1
];
174 #define KERNEL_FILTER_BYTECODE_MAX_LEN 65536
175 struct lttng_kernel_filter_bytecode
{
177 uint32_t reloc_offset
;
183 * kernel session name
185 struct lttng_kernel_session_name
{
186 char name
[LTTNG_KERNEL_SESSION_NAME_LEN
];
189 #endif /* _LTTNG_KERNEL_H */