syscall tracing: update tests
[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,
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56};
57
58/* Perf counter attributes */
59struct lttng_kernel_perf_counter_ctx {
60 uint32_t type;
61 uint64_t config;
dbbb3ec5 62 char name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 63} LTTNG_PACKED;
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64
65/* Event/Channel context */
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66#define LTTNG_KERNEL_CONTEXT_PADDING1 16
67#define LTTNG_KERNEL_CONTEXT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
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68struct lttng_kernel_context {
69 enum lttng_kernel_context_type ctx;
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70 char padding[LTTNG_KERNEL_CONTEXT_PADDING1];
71
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72 union {
73 struct lttng_kernel_perf_counter_ctx perf_counter;
dbbb3ec5 74 char padding[LTTNG_KERNEL_CONTEXT_PADDING2];
7d29a247 75 } u;
113373e4 76} LTTNG_PACKED;
9cb98350 77
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78struct lttng_kernel_kretprobe {
79 uint64_t addr;
80
81 uint64_t offset;
dbbb3ec5 82 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 83} LTTNG_PACKED;
8f0d098b 84
93128a92 85/*
7d29a247 86 * Either addr is used, or symbol_name and offset.
93128a92 87 */
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88struct lttng_kernel_kprobe {
89 uint64_t addr;
90
91 uint64_t offset;
dbbb3ec5 92 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 93} LTTNG_PACKED;
9cb98350 94
f05b5f07 95/* Function tracer */
7d29a247 96struct lttng_kernel_function {
dbbb3ec5 97 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 98} LTTNG_PACKED;
93128a92 99
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100#define LTTNG_KERNEL_EVENT_PADDING1 16
101#define LTTNG_KERNEL_EVENT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
9cb98350 102struct lttng_kernel_event {
dbbb3ec5 103 char name[LTTNG_KERNEL_SYM_NAME_LEN];
9cb98350 104 enum lttng_kernel_instrumentation instrumentation;
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105 char padding[LTTNG_KERNEL_EVENT_PADDING1];
106
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107 /* Per instrumentation type configuration */
108 union {
8f0d098b 109 struct lttng_kernel_kretprobe kretprobe;
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110 struct lttng_kernel_kprobe kprobe;
111 struct lttng_kernel_function ftrace;
dbbb3ec5 112 char padding[LTTNG_KERNEL_EVENT_PADDING2];
9cb98350 113 } u;
113373e4 114} LTTNG_PACKED;
93128a92 115
9cb98350 116struct lttng_kernel_tracer_version {
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117 uint32_t major;
118 uint32_t minor;
9cb98350 119 uint32_t patchlevel;
113373e4 120} LTTNG_PACKED;
93128a92 121
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122struct lttng_kernel_tracer_abi_version {
123 uint32_t major;
124 uint32_t minor;
125} LTTNG_PACKED;
126
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127enum lttng_kernel_calibrate_type {
128 LTTNG_KERNEL_CALIBRATE_KRETPROBE,
129};
130
131struct lttng_kernel_calibrate {
132 enum lttng_kernel_calibrate_type type; /* type (input) */
113373e4 133} LTTNG_PACKED;
4dbc372b 134
e80c3634 135struct lttng_kernel_syscall_mask {
46820c8b 136 uint32_t len; /* in bits */
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137 char mask[];
138} LTTNG_PACKED;
139
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140/*
141 * kernel channel
142 */
143#define LTTNG_KERNEL_CHANNEL_PADDING1 LTTNG_SYMBOL_NAME_LEN + 32
144struct 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 */
150
151 int overwrite; /* 1: overwrite, 0: discard */
152 char padding[LTTNG_KERNEL_CHANNEL_PADDING1];
113373e4 153} LTTNG_PACKED;
d0254c7c 154
93128a92 155#endif /* _LTTNG_KERNEL_H */
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