Cleanup: remove dead increment of pointer
[lttng-tools.git] / src / common / lttng-kernel.h
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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 *
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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.
93128a92 9 *
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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
13 * more details.
93128a92 14 *
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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.
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18 */
19
20#ifndef _LTTNG_KERNEL_H
21#define _LTTNG_KERNEL_H
22
e848fc76 23#include <stdint.h>
113373e4 24#include <common/macros.h>
e848fc76 25
dbbb3ec5 26#define LTTNG_KERNEL_SYM_NAME_LEN 256
9cb98350 27
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28/*
29 * LTTng DebugFS ABI structures.
30 *
31 * This is the kernel ABI copied from lttng-modules tree.
32 */
33
9cb98350 34enum lttng_kernel_instrumentation {
5f822d0a 35 LTTNG_KERNEL_ALL = -1, /* Used within lttng-tools */
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36 LTTNG_KERNEL_TRACEPOINT = 0,
37 LTTNG_KERNEL_KPROBE = 1,
38 LTTNG_KERNEL_FUNCTION = 2,
8f0d098b 39 LTTNG_KERNEL_KRETPROBE = 3,
0133c199 40 LTTNG_KERNEL_NOOP = 4, /* not hooked */
a54bd42d 41 LTTNG_KERNEL_SYSCALL = 5,
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42};
43
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44enum lttng_kernel_context_type {
45 LTTNG_KERNEL_CONTEXT_PID = 0,
aa3514e9 46 LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER = 1,
9197c5c4 47 LTTNG_KERNEL_CONTEXT_PROCNAME = 2,
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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,
54773d68 55 LTTNG_KERNEL_CONTEXT_HOSTNAME = 10,
33e801a9 56 LTTNG_KERNEL_CONTEXT_CPU_ID = 11,
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57 LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE = 12,
58 LTTNG_KERNEL_CONTEXT_PREEMPTIBLE = 13,
59 LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE = 14,
60 LTTNG_KERNEL_CONTEXT_MIGRATABLE = 15,
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61};
62
63/* Perf counter attributes */
64struct lttng_kernel_perf_counter_ctx {
65 uint32_t type;
66 uint64_t config;
dbbb3ec5 67 char name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 68} LTTNG_PACKED;
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69
70/* Event/Channel context */
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71#define LTTNG_KERNEL_CONTEXT_PADDING1 16
72#define LTTNG_KERNEL_CONTEXT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
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73struct lttng_kernel_context {
74 enum lttng_kernel_context_type ctx;
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75 char padding[LTTNG_KERNEL_CONTEXT_PADDING1];
76
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77 union {
78 struct lttng_kernel_perf_counter_ctx perf_counter;
dbbb3ec5 79 char padding[LTTNG_KERNEL_CONTEXT_PADDING2];
7d29a247 80 } u;
113373e4 81} LTTNG_PACKED;
9cb98350 82
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83struct lttng_kernel_kretprobe {
84 uint64_t addr;
85
86 uint64_t offset;
dbbb3ec5 87 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 88} LTTNG_PACKED;
8f0d098b 89
93128a92 90/*
7d29a247 91 * Either addr is used, or symbol_name and offset.
93128a92 92 */
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93struct lttng_kernel_kprobe {
94 uint64_t addr;
95
96 uint64_t offset;
dbbb3ec5 97 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 98} LTTNG_PACKED;
9cb98350 99
f05b5f07 100/* Function tracer */
7d29a247 101struct lttng_kernel_function {
dbbb3ec5 102 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 103} LTTNG_PACKED;
93128a92 104
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105#define LTTNG_KERNEL_EVENT_PADDING1 16
106#define LTTNG_KERNEL_EVENT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
9cb98350 107struct lttng_kernel_event {
dbbb3ec5 108 char name[LTTNG_KERNEL_SYM_NAME_LEN];
9cb98350 109 enum lttng_kernel_instrumentation instrumentation;
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110 char padding[LTTNG_KERNEL_EVENT_PADDING1];
111
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112 /* Per instrumentation type configuration */
113 union {
8f0d098b 114 struct lttng_kernel_kretprobe kretprobe;
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115 struct lttng_kernel_kprobe kprobe;
116 struct lttng_kernel_function ftrace;
dbbb3ec5 117 char padding[LTTNG_KERNEL_EVENT_PADDING2];
9cb98350 118 } u;
113373e4 119} LTTNG_PACKED;
93128a92 120
9cb98350 121struct lttng_kernel_tracer_version {
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122 uint32_t major;
123 uint32_t minor;
9cb98350 124 uint32_t patchlevel;
113373e4 125} LTTNG_PACKED;
93128a92 126
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127struct lttng_kernel_tracer_abi_version {
128 uint32_t major;
129 uint32_t minor;
130} LTTNG_PACKED;
131
e80c3634 132struct lttng_kernel_syscall_mask {
46820c8b 133 uint32_t len; /* in bits */
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134 char mask[];
135} LTTNG_PACKED;
136
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137/*
138 * kernel channel
139 */
140#define LTTNG_KERNEL_CHANNEL_PADDING1 LTTNG_SYMBOL_NAME_LEN + 32
141struct lttng_kernel_channel {
142 uint64_t subbuf_size; /* bytes */
143 uint64_t num_subbuf; /* power of 2 */
144 unsigned int switch_timer_interval; /* usec */
145 unsigned int read_timer_interval; /* usec */
146 enum lttng_event_output output; /* splice, mmap */
147
148 int overwrite; /* 1: overwrite, 0: discard */
149 char padding[LTTNG_KERNEL_CHANNEL_PADDING1];
113373e4 150} LTTNG_PACKED;
d0254c7c 151
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152#define KERNEL_FILTER_BYTECODE_MAX_LEN 65536
153struct lttng_kernel_filter_bytecode {
154 uint32_t len;
155 uint32_t reloc_offset;
156 uint64_t seqnum;
157 char data[0];
158} LTTNG_PACKED;
159
93128a92 160#endif /* _LTTNG_KERNEL_H */
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