Implement filter bytecode support in lttng-session, and parse filter string
[lttng-tools.git] / src / bin / lttng-sessiond / lttng-ust-abi.h
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1#ifndef _LTTNG_UST_ABI_H
2#define _LTTNG_UST_ABI_H
3
4/*
9df8df5e 5 * lttng/ust-abi.h
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6 *
7 * Copyright 2010-2011 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
8 *
9 * LTTng-UST ABI header
10 *
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11 * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
12 * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
13 *
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14 * Permission is hereby granted, free of charge, to any person obtaining a copy
15 * of this software and associated documentation files (the "Software"), to deal
16 * in the Software without restriction, including without limitation the rights
17 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
18 * copies of the Software, and to permit persons to whom the Software is
19 * furnished to do so, subject to the following conditions:
20 *
21 * The above copyright notice and this permission notice shall be included in
22 * all copies or substantial portions of the Software.
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23 */
24
25#include <stdint.h>
26
57ab7638 27#define LTTNG_UST_SYM_NAME_LEN 256
3bd1e081 28
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29#define LTTNG_UST_COMM_VERSION_MAJOR 2
30#define LTTNG_UST_COMM_VERSION_MINOR 0
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31
32enum lttng_ust_instrumentation {
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33 LTTNG_UST_TRACEPOINT = 0,
34 LTTNG_UST_PROBE = 1,
35 LTTNG_UST_FUNCTION = 2,
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36};
37
38enum lttng_ust_loglevel_type {
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39 LTTNG_UST_LOGLEVEL_ALL = 0,
40 LTTNG_UST_LOGLEVEL_RANGE = 1,
41 LTTNG_UST_LOGLEVEL_SINGLE = 2,
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42};
43
44enum lttng_ust_output {
45 LTTNG_UST_MMAP = 0,
46};
47
48struct lttng_ust_tracer_version {
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49 uint32_t major;
50 uint32_t minor;
3bd1e081 51 uint32_t patchlevel;
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52};
53
3f3c65dc 54#define LTTNG_UST_CHANNEL_PADDING LTTNG_UST_SYM_NAME_LEN + 32
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55struct lttng_ust_channel {
56 int overwrite; /* 1: overwrite, 0: discard */
57 uint64_t subbuf_size; /* in bytes */
58 uint64_t num_subbuf;
59 unsigned int switch_timer_interval; /* usecs */
60 unsigned int read_timer_interval; /* usecs */
61 enum lttng_ust_output output; /* output mode */
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62 char padding[LTTNG_UST_CHANNEL_PADDING];
63};
64
65#define LTTNG_UST_STREAM_PADDING1 16
66#define LTTNG_UST_STREAM_PADDING2 LTTNG_UST_SYM_NAME_LEN + 32
67struct lttng_ust_stream {
68 char padding[LTTNG_UST_STREAM_PADDING1];
69
70 union {
71 char padding[LTTNG_UST_STREAM_PADDING2];
72 } u;
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73};
74
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75#define LTTNG_UST_EVENT_PADDING1 16
76#define LTTNG_UST_EVENT_PADDING2 LTTNG_UST_SYM_NAME_LEN + 32
3bd1e081 77struct lttng_ust_event {
69892bbb 78 enum lttng_ust_instrumentation instrumentation;
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79 char name[LTTNG_UST_SYM_NAME_LEN]; /* event name */
80
81 enum lttng_ust_loglevel_type loglevel_type;
8005f29a 82 int loglevel; /* value, -1: all */
3f3c65dc 83 char padding[LTTNG_UST_EVENT_PADDING1];
0cda4f28 84
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85 /* Per instrumentation type configuration */
86 union {
3f3c65dc 87 char padding[LTTNG_UST_EVENT_PADDING2];
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88 } u;
89};
90
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91enum lttng_ust_field_type {
92 LTTNG_UST_FIELD_OTHER = 0,
93 LTTNG_UST_FIELD_INTEGER = 1,
94 LTTNG_UST_FIELD_ENUM = 2,
95 LTTNG_UST_FIELD_FLOAT = 3,
96 LTTNG_UST_FIELD_STRING = 4,
97};
98
99#define LTTNG_UST_FIELD_ITER_PADDING LTTNG_UST_SYM_NAME_LEN + 32
100struct lttng_ust_field_iter {
101 char event_name[LTTNG_UST_SYM_NAME_LEN];
102 char field_name[LTTNG_UST_SYM_NAME_LEN];
103 enum lttng_ust_field_type type;
104 int loglevel; /* event loglevel */
105 char padding[LTTNG_UST_FIELD_ITER_PADDING];
106};
107
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108enum lttng_ust_context_type {
109 LTTNG_UST_CONTEXT_VTID = 0,
110 LTTNG_UST_CONTEXT_VPID = 1,
111 LTTNG_UST_CONTEXT_PTHREAD_ID = 2,
112 LTTNG_UST_CONTEXT_PROCNAME = 3,
113};
114
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115#define LTTNG_UST_CONTEXT_PADDING1 16
116#define LTTNG_UST_CONTEXT_PADDING2 LTTNG_UST_SYM_NAME_LEN + 32
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117struct lttng_ust_context {
118 enum lttng_ust_context_type ctx;
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119 char padding[LTTNG_UST_CONTEXT_PADDING1];
120
3bd1e081 121 union {
3f3c65dc 122 char padding[LTTNG_UST_CONTEXT_PADDING2];
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123 } u;
124};
125
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126/*
127 * Tracer channel attributes.
128 */
3f3c65dc 129#define LTTNG_UST_CHANNEL_ATTR_PADDING LTTNG_UST_SYM_NAME_LEN + 32
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130struct lttng_ust_channel_attr {
131 int overwrite; /* 1: overwrite, 0: discard */
132 uint64_t subbuf_size; /* bytes */
133 uint64_t num_subbuf; /* power of 2 */
134 unsigned int switch_timer_interval; /* usec */
135 unsigned int read_timer_interval; /* usec */
136 enum lttng_ust_output output; /* splice, mmap */
3f3c65dc 137 char padding[LTTNG_UST_CHANNEL_ATTR_PADDING];
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138};
139
3f3c65dc 140#define LTTNG_UST_TRACEPOINT_ITER_PADDING 16
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141struct lttng_ust_tracepoint_iter {
142 char name[LTTNG_UST_SYM_NAME_LEN]; /* provider:name */
8005f29a 143 int loglevel;
3f3c65dc 144 char padding[LTTNG_UST_TRACEPOINT_ITER_PADDING];
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145};
146
3f3c65dc 147#define LTTNG_UST_OBJECT_DATA_PADDING LTTNG_UST_SYM_NAME_LEN + 32
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148struct lttng_ust_object_data {
149 int handle;
150 int shm_fd;
151 int wait_fd;
152 uint64_t memory_map_size;
3f3c65dc 153 char padding[LTTNG_UST_OBJECT_DATA_PADDING];
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154};
155
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156enum lttng_ust_calibrate_type {
157 LTTNG_UST_CALIBRATE_TRACEPOINT,
158};
159
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160#define LTTNG_UST_CALIBRATE_PADDING1 16
161#define LTTNG_UST_CALIBRATE_PADDING2 LTTNG_UST_SYM_NAME_LEN + 32
f7e1a950 162struct lttng_ust_calibrate {
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163 enum lttng_ust_calibrate_type type; /* type (input) */
164 char padding[LTTNG_UST_CALIBRATE_PADDING1];
165
166 union {
167 char padding[LTTNG_UST_CALIBRATE_PADDING2];
168 } u;
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169};
170
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171#define FILTER_BYTECODE_MAX_LEN 65535
172struct lttng_ust_filter_bytecode {
173 uint16_t len;
174 uint16_t reloc_offset;
175 char data[0];
176};
177
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178#define _UST_CMD(minor) (minor)
179#define _UST_CMDR(minor, type) (minor)
180#define _UST_CMDW(minor, type) (minor)
181
182/* Handled by object descriptor */
183#define LTTNG_UST_RELEASE _UST_CMD(0x1)
184
185/* Handled by object cmd */
186
187/* LTTng-UST commands */
188#define LTTNG_UST_SESSION _UST_CMD(0x40)
189#define LTTNG_UST_TRACER_VERSION \
190 _UST_CMDR(0x41, struct lttng_ust_tracer_version)
191#define LTTNG_UST_TRACEPOINT_LIST _UST_CMD(0x42)
192#define LTTNG_UST_WAIT_QUIESCENT _UST_CMD(0x43)
193#define LTTNG_UST_REGISTER_DONE _UST_CMD(0x44)
f214d69a 194#define LTTNG_UST_TRACEPOINT_FIELD_LIST _UST_CMD(0x45)
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195
196/* Session FD commands */
197#define LTTNG_UST_METADATA \
198 _UST_CMDW(0x50, struct lttng_ust_channel)
199#define LTTNG_UST_CHANNEL \
200 _UST_CMDW(0x51, struct lttng_ust_channel)
201#define LTTNG_UST_SESSION_START _UST_CMD(0x52)
202#define LTTNG_UST_SESSION_STOP _UST_CMD(0x53)
203
204/* Channel FD commands */
205#define LTTNG_UST_STREAM _UST_CMD(0x60)
206#define LTTNG_UST_EVENT \
207 _UST_CMDW(0x61, struct lttng_ust_event)
208
209/* Event and Channel FD commands */
210#define LTTNG_UST_CONTEXT \
211 _UST_CMDW(0x70, struct lttng_ust_context)
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212#define LTTNG_UST_FLUSH_BUFFER \
213 _UST_CMD(0x71)
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214
215/* Event, Channel and Session commands */
216#define LTTNG_UST_ENABLE _UST_CMD(0x80)
217#define LTTNG_UST_DISABLE _UST_CMD(0x81)
218
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219/* Tracepoint list commands */
220#define LTTNG_UST_TRACEPOINT_LIST_GET _UST_CMD(0x90)
f214d69a 221#define LTTNG_UST_TRACEPOINT_FIELD_LIST_GET _UST_CMD(0x91)
8ec2d32a 222
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223#define LTTNG_UST_ROOT_HANDLE 0
224
9df8df5e 225struct lttng_ust_obj;
3bd1e081 226
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227union ust_args {
228 struct {
229 int *shm_fd;
230 int *wait_fd;
231 uint64_t *memory_map_size;
232 } channel;
233 struct {
234 int *shm_fd;
235 int *wait_fd;
236 uint64_t *memory_map_size;
237 } stream;
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238 struct {
239 struct lttng_ust_field_iter entry;
240 } field_list;
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241};
242
9df8df5e 243struct lttng_ust_objd_ops {
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244 long (*cmd)(int objd, unsigned int cmd, unsigned long arg,
245 union ust_args *args);
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246 int (*release)(int objd);
247};
248
249/* Create root handle. Always ID 0. */
250int lttng_abi_create_root_handle(void);
251
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252const struct lttng_ust_objd_ops *objd_ops(int id);
253int lttng_ust_objd_unref(int id);
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254
255void lttng_ust_abi_exit(void);
9df8df5e 256void lttng_ust_events_exit(void);
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257
258#endif /* _LTTNG_UST_ABI_H */
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