Fix: mmap write() for large subbuffers and handle EINTR (v2)
[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
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23#include <stdint.h>
24
dbbb3ec5 25#define LTTNG_KERNEL_SYM_NAME_LEN 256
9cb98350 26
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27/*
28 * LTTng DebugFS ABI structures.
29 *
30 * This is the kernel ABI copied from lttng-modules tree.
31 */
32
9cb98350 33enum lttng_kernel_instrumentation {
5f822d0a 34 LTTNG_KERNEL_ALL = -1, /* Used within lttng-tools */
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35 LTTNG_KERNEL_TRACEPOINT = 0,
36 LTTNG_KERNEL_KPROBE = 1,
37 LTTNG_KERNEL_FUNCTION = 2,
8f0d098b 38 LTTNG_KERNEL_KRETPROBE = 3,
0133c199 39 LTTNG_KERNEL_NOOP = 4, /* not hooked */
a54bd42d 40 LTTNG_KERNEL_SYSCALL = 5,
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41};
42
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43enum lttng_kernel_context_type {
44 LTTNG_KERNEL_CONTEXT_PID = 0,
45 LTTNG_KERNEL_CONTEXT_PERF_COUNTER = 1,
9197c5c4 46 LTTNG_KERNEL_CONTEXT_PROCNAME = 2,
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47 LTTNG_KERNEL_CONTEXT_PRIO = 3,
48 LTTNG_KERNEL_CONTEXT_NICE = 4,
49 LTTNG_KERNEL_CONTEXT_VPID = 5,
50 LTTNG_KERNEL_CONTEXT_TID = 6,
51 LTTNG_KERNEL_CONTEXT_VTID = 7,
52 LTTNG_KERNEL_CONTEXT_PPID = 8,
53 LTTNG_KERNEL_CONTEXT_VPPID = 9,
54};
55
56/* Perf counter attributes */
57struct lttng_kernel_perf_counter_ctx {
58 uint32_t type;
59 uint64_t config;
dbbb3ec5 60 char name[LTTNG_KERNEL_SYM_NAME_LEN];
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61};
62
63/* Event/Channel context */
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64#define LTTNG_KERNEL_CONTEXT_PADDING1 16
65#define LTTNG_KERNEL_CONTEXT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
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66struct lttng_kernel_context {
67 enum lttng_kernel_context_type ctx;
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68 char padding[LTTNG_KERNEL_CONTEXT_PADDING1];
69
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70 union {
71 struct lttng_kernel_perf_counter_ctx perf_counter;
dbbb3ec5 72 char padding[LTTNG_KERNEL_CONTEXT_PADDING2];
7d29a247 73 } u;
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74};
75
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76struct lttng_kernel_kretprobe {
77 uint64_t addr;
78
79 uint64_t offset;
dbbb3ec5 80 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
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81};
82
93128a92 83/*
7d29a247 84 * Either addr is used, or symbol_name and offset.
93128a92 85 */
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86struct lttng_kernel_kprobe {
87 uint64_t addr;
88
89 uint64_t offset;
dbbb3ec5 90 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
7d29a247 91};
9cb98350 92
f05b5f07 93/* Function tracer */
7d29a247 94struct lttng_kernel_function {
dbbb3ec5 95 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
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96};
97
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98#define LTTNG_KERNEL_EVENT_PADDING1 16
99#define LTTNG_KERNEL_EVENT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
9cb98350 100struct lttng_kernel_event {
dbbb3ec5 101 char name[LTTNG_KERNEL_SYM_NAME_LEN];
9cb98350 102 enum lttng_kernel_instrumentation instrumentation;
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103 char padding[LTTNG_KERNEL_EVENT_PADDING1];
104
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105 /* Per instrumentation type configuration */
106 union {
8f0d098b 107 struct lttng_kernel_kretprobe kretprobe;
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108 struct lttng_kernel_kprobe kprobe;
109 struct lttng_kernel_function ftrace;
dbbb3ec5 110 char padding[LTTNG_KERNEL_EVENT_PADDING2];
9cb98350 111 } u;
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112};
113
9cb98350 114struct lttng_kernel_tracer_version {
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115 uint32_t major;
116 uint32_t minor;
9cb98350 117 uint32_t patchlevel;
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118};
119
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120enum lttng_kernel_calibrate_type {
121 LTTNG_KERNEL_CALIBRATE_KRETPROBE,
122};
123
124struct lttng_kernel_calibrate {
125 enum lttng_kernel_calibrate_type type; /* type (input) */
126};
127
93128a92 128#endif /* _LTTNG_KERNEL_H */
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