Commit | Line | Data |
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17baffe2 | 1 | /* |
451e462f | 2 | * lttng-tracepoint-event-impl.h |
17baffe2 MD |
3 | * |
4 | * Copyright (C) 2009 Steven Rostedt <rostedt@goodmis.org> | |
f127e61e | 5 | * Copyright (C) 2009-2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
17baffe2 | 6 | * |
886d51a3 MD |
7 | * This library is free software; you can redistribute it and/or |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; only | |
10 | * version 2.1 of the License. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with this library; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
17baffe2 | 20 | */ |
f127e61e | 21 | |
d28686c1 | 22 | #include <linux/uaccess.h> |
d0dd2ecb | 23 | #include <linux/debugfs.h> |
f127e61e | 24 | #include <linux/rculist.h> |
43803cf2 | 25 | #include <asm/byteorder.h> |
8d43abb7 MD |
26 | |
27 | #include <probes/lttng.h> | |
28 | #include <probes/lttng-types.h> | |
29 | #include <probes/lttng-probe-user.h> | |
30 | #include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_all() */ | |
31 | #include <wrapper/ringbuffer/frontend_types.h> | |
32 | #include <wrapper/rcu.h> | |
33 | #include <lttng-events.h> | |
34 | #include <lttng-tracer-core.h> | |
40652b65 | 35 | |
40652b65 | 36 | /* |
6db3d13b | 37 | * Macro declarations used for all stages. |
40652b65 MD |
38 | */ |
39 | ||
76e4f017 MD |
40 | /* |
41 | * LTTng name mapping macros. LTTng remaps some of the kernel events to | |
42 | * enforce name-spacing. | |
43 | */ | |
3bc29f0a | 44 | #undef LTTNG_TRACEPOINT_EVENT_MAP |
f127e61e | 45 | #define LTTNG_TRACEPOINT_EVENT_MAP(name, map, proto, args, fields) \ |
3bc29f0a | 46 | LTTNG_TRACEPOINT_EVENT_CLASS(map, \ |
76e4f017 MD |
47 | PARAMS(proto), \ |
48 | PARAMS(args), \ | |
f127e61e | 49 | PARAMS(fields)) \ |
3bc29f0a | 50 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), PARAMS(args)) |
76e4f017 | 51 | |
3bc29f0a | 52 | #undef LTTNG_TRACEPOINT_EVENT_MAP_NOARGS |
f127e61e | 53 | #define LTTNG_TRACEPOINT_EVENT_MAP_NOARGS(name, map, fields) \ |
3bc29f0a | 54 | LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(map, \ |
f127e61e | 55 | PARAMS(fields)) \ |
3bc29f0a | 56 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(map, name, map) |
76e4f017 | 57 | |
f127e61e | 58 | #undef LTTNG_TRACEPOINT_EVENT_CODE_MAP |
265822ae | 59 | #define LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, map, proto, args, _locvar, _code_pre, fields, _code_post) \ |
f127e61e MD |
60 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE(map, \ |
61 | PARAMS(proto), \ | |
62 | PARAMS(args), \ | |
63 | PARAMS(_locvar), \ | |
265822ae MD |
64 | PARAMS(_code_pre), \ |
65 | PARAMS(fields), \ | |
66 | PARAMS(_code_post)) \ | |
f127e61e MD |
67 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), PARAMS(args)) |
68 | ||
3bc29f0a | 69 | #undef LTTNG_TRACEPOINT_EVENT_CODE |
265822ae | 70 | #define LTTNG_TRACEPOINT_EVENT_CODE(name, proto, args, _locvar, _code_pre, fields, _code_post) \ |
f127e61e | 71 | LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, name, \ |
7ca580f8 MD |
72 | PARAMS(proto), \ |
73 | PARAMS(args), \ | |
74 | PARAMS(_locvar), \ | |
265822ae MD |
75 | PARAMS(_code_pre), \ |
76 | PARAMS(fields), \ | |
77 | PARAMS(_code_post)) | |
fcf7fa33 | 78 | |
40652b65 | 79 | /* |
3bc29f0a MD |
80 | * LTTNG_TRACEPOINT_EVENT_CLASS can be used to add a generic function |
81 | * handlers for events. That is, if all events have the same parameters | |
82 | * and just have distinct trace points. Each tracepoint can be defined | |
83 | * with LTTNG_TRACEPOINT_EVENT_INSTANCE and that will map the | |
84 | * LTTNG_TRACEPOINT_EVENT_CLASS to the tracepoint. | |
40652b65 | 85 | * |
3bc29f0a MD |
86 | * LTTNG_TRACEPOINT_EVENT is a one to one mapping between tracepoint and |
87 | * template. | |
40652b65 | 88 | */ |
6db3d13b | 89 | |
3bc29f0a | 90 | #undef LTTNG_TRACEPOINT_EVENT |
f127e61e | 91 | #define LTTNG_TRACEPOINT_EVENT(name, proto, args, fields) \ |
3bc29f0a MD |
92 | LTTNG_TRACEPOINT_EVENT_MAP(name, name, \ |
93 | PARAMS(proto), \ | |
94 | PARAMS(args), \ | |
f127e61e | 95 | PARAMS(fields)) |
40652b65 | 96 | |
3bc29f0a | 97 | #undef LTTNG_TRACEPOINT_EVENT_NOARGS |
f127e61e MD |
98 | #define LTTNG_TRACEPOINT_EVENT_NOARGS(name, fields) \ |
99 | LTTNG_TRACEPOINT_EVENT_MAP_NOARGS(name, name, PARAMS(fields)) | |
76e4f017 | 100 | |
3bc29f0a MD |
101 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE |
102 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE(template, name, proto, args) \ | |
103 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(template, name, name, PARAMS(proto), PARAMS(args)) | |
76e4f017 | 104 | |
3bc29f0a MD |
105 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS |
106 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(template, name) \ | |
107 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(template, name, name) | |
76e4f017 | 108 | |
3bc29f0a | 109 | #undef LTTNG_TRACEPOINT_EVENT_CLASS |
f127e61e | 110 | #define LTTNG_TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ |
3bc29f0a | 111 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, PARAMS(_proto), PARAMS(_args), , , \ |
265822ae | 112 | PARAMS(_fields), ) |
7ca580f8 | 113 | |
3bc29f0a | 114 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS |
f127e61e | 115 | #define LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ |
265822ae | 116 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, , , PARAMS(_fields), ) |
7ca580f8 MD |
117 | |
118 | ||
f62b389e | 119 | /* |
c099397a | 120 | * Stage 1 of the trace events. |
f62b389e MD |
121 | * |
122 | * Create dummy trace calls for each events, verifying that the LTTng module | |
3bc29f0a MD |
123 | * instrumentation headers match the kernel arguments. Will be optimized |
124 | * out by the compiler. | |
f62b389e MD |
125 | */ |
126 | ||
f127e61e MD |
127 | /* Reset all macros within TRACEPOINT_EVENT */ |
128 | #include "lttng-events-reset.h" | |
f62b389e MD |
129 | |
130 | #undef TP_PROTO | |
f127e61e | 131 | #define TP_PROTO(...) __VA_ARGS__ |
f62b389e MD |
132 | |
133 | #undef TP_ARGS | |
f127e61e | 134 | #define TP_ARGS(...) __VA_ARGS__ |
f62b389e | 135 | |
3bc29f0a MD |
136 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP |
137 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ | |
7eb827f2 | 138 | void trace_##_name(_proto); |
f62b389e | 139 | |
3bc29f0a MD |
140 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS |
141 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ | |
cb1aa0c7 | 142 | void trace_##_name(void); |
f7bdf4db | 143 | |
f62b389e MD |
144 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
145 | ||
d0558de2 MD |
146 | /* |
147 | * Stage 1.1 of the trace events. | |
148 | * | |
149 | * Create dummy trace prototypes for each event class, and for each used | |
150 | * template. This will allow checking whether the prototypes from the | |
151 | * class and the instance using the class actually match. | |
152 | */ | |
153 | ||
154 | #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ | |
155 | ||
156 | #undef TP_PROTO | |
157 | #define TP_PROTO(...) __VA_ARGS__ | |
158 | ||
159 | #undef TP_ARGS | |
160 | #define TP_ARGS(...) __VA_ARGS__ | |
161 | ||
162 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP | |
163 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ | |
164 | void __event_template_proto___##_template(_proto); | |
165 | ||
166 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS | |
167 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ | |
168 | void __event_template_proto___##_template(void); | |
169 | ||
170 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE | |
265822ae | 171 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
d0558de2 MD |
172 | void __event_template_proto___##_name(_proto); |
173 | ||
174 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS | |
265822ae | 175 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
d0558de2 MD |
176 | void __event_template_proto___##_name(void); |
177 | ||
178 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
179 | ||
6db3d13b | 180 | /* |
c099397a | 181 | * Stage 2 of the trace events. |
6db3d13b MD |
182 | * |
183 | * Create event field type metadata section. | |
184 | * Each event produce an array of fields. | |
185 | */ | |
186 | ||
f127e61e MD |
187 | /* Reset all macros within TRACEPOINT_EVENT */ |
188 | #include "lttng-events-reset.h" | |
189 | #include "lttng-events-write.h" | |
190 | #include "lttng-events-nowrite.h" | |
6db3d13b | 191 | |
f127e61e MD |
192 | #undef _ctf_integer_ext |
193 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \ | |
c099397a MD |
194 | { \ |
195 | .name = #_item, \ | |
43803cf2 | 196 | .type = __type_integer(_type, 0, 0, -1, _byte_order, _base, none),\ |
f127e61e MD |
197 | .nowrite = _nowrite, \ |
198 | .user = _user, \ | |
c099397a | 199 | }, |
40652b65 | 200 | |
f127e61e MD |
201 | #undef _ctf_array_encoded |
202 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \ | |
299338c8 | 203 | { \ |
c099397a MD |
204 | .name = #_item, \ |
205 | .type = \ | |
206 | { \ | |
299338c8 | 207 | .atype = atype_array, \ |
f127e61e | 208 | .u = \ |
c099397a | 209 | { \ |
f127e61e MD |
210 | .array = \ |
211 | { \ | |
43803cf2 | 212 | .elem_type = __type_integer(_type, 0, 0, 0, __BYTE_ORDER, 10, _encoding), \ |
f127e61e MD |
213 | .length = _length, \ |
214 | } \ | |
215 | } \ | |
299338c8 | 216 | }, \ |
f127e61e MD |
217 | .nowrite = _nowrite, \ |
218 | .user = _user, \ | |
299338c8 | 219 | }, |
40652b65 | 220 | |
43803cf2 MD |
221 | #undef _ctf_array_bitfield |
222 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ | |
223 | { \ | |
224 | .name = #_item, \ | |
225 | .type = \ | |
226 | { \ | |
227 | .atype = atype_array, \ | |
228 | .u = \ | |
229 | { \ | |
230 | .array = \ | |
231 | { \ | |
232 | .elem_type = __type_integer(_type, 1, 1, 0, __LITTLE_ENDIAN, 10, none), \ | |
233 | .length = (_length) * sizeof(_type) * CHAR_BIT, \ | |
234 | .elem_alignment = lttng_alignof(_type), \ | |
235 | } \ | |
236 | } \ | |
237 | }, \ | |
238 | .nowrite = _nowrite, \ | |
239 | .user = _user, \ | |
240 | }, | |
241 | ||
242 | ||
f127e61e MD |
243 | #undef _ctf_sequence_encoded |
244 | #define _ctf_sequence_encoded(_type, _item, _src, \ | |
245 | _length_type, _src_length, _encoding, \ | |
57ede728 | 246 | _byte_order, _base, _user, _nowrite) \ |
299338c8 | 247 | { \ |
c099397a MD |
248 | .name = #_item, \ |
249 | .type = \ | |
250 | { \ | |
299338c8 | 251 | .atype = atype_sequence, \ |
f127e61e | 252 | .u = \ |
c099397a | 253 | { \ |
f127e61e MD |
254 | .sequence = \ |
255 | { \ | |
43803cf2 MD |
256 | .length_type = __type_integer(_length_type, 0, 0, 0, __BYTE_ORDER, 10, none), \ |
257 | .elem_type = __type_integer(_type, 0, 0, -1, _byte_order, _base, _encoding), \ | |
258 | }, \ | |
259 | }, \ | |
260 | }, \ | |
261 | .nowrite = _nowrite, \ | |
262 | .user = _user, \ | |
263 | }, | |
264 | ||
265 | #undef _ctf_sequence_bitfield | |
266 | #define _ctf_sequence_bitfield(_type, _item, _src, \ | |
267 | _length_type, _src_length, \ | |
268 | _user, _nowrite) \ | |
269 | { \ | |
270 | .name = #_item, \ | |
271 | .type = \ | |
272 | { \ | |
273 | .atype = atype_sequence, \ | |
274 | .u = \ | |
275 | { \ | |
276 | .sequence = \ | |
277 | { \ | |
278 | .length_type = __type_integer(_length_type, 0, 0, 0, __BYTE_ORDER, 10, none), \ | |
279 | .elem_type = __type_integer(_type, 1, 1, 0, __LITTLE_ENDIAN, 10, none), \ | |
280 | .elem_alignment = lttng_alignof(_type), \ | |
f127e61e | 281 | }, \ |
c099397a | 282 | }, \ |
299338c8 | 283 | }, \ |
f127e61e MD |
284 | .nowrite = _nowrite, \ |
285 | .user = _user, \ | |
299338c8 | 286 | }, |
40652b65 | 287 | |
f127e61e MD |
288 | #undef _ctf_string |
289 | #define _ctf_string(_item, _src, _user, _nowrite) \ | |
299338c8 | 290 | { \ |
c099397a MD |
291 | .name = #_item, \ |
292 | .type = \ | |
293 | { \ | |
299338c8 | 294 | .atype = atype_string, \ |
f127e61e MD |
295 | .u = \ |
296 | { \ | |
297 | .basic = { .string = { .encoding = lttng_encode_UTF8 } } \ | |
298 | }, \ | |
299338c8 | 299 | }, \ |
f127e61e MD |
300 | .nowrite = _nowrite, \ |
301 | .user = _user, \ | |
299338c8 | 302 | }, |
1d12cebd | 303 | |
f127e61e MD |
304 | #undef TP_FIELDS |
305 | #define TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */ | |
1d12cebd | 306 | |
3bc29f0a | 307 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
265822ae | 308 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
0d1d4002 | 309 | static const struct lttng_event_field __event_fields___##_name[] = { \ |
f127e61e | 310 | _fields \ |
299338c8 MD |
311 | }; |
312 | ||
3bc29f0a | 313 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
265822ae MD |
314 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
315 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, PARAMS(_fields), _code_post) | |
f7bdf4db | 316 | |
299338c8 MD |
317 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
318 | ||
19c57fbf | 319 | /* |
c099397a | 320 | * Stage 3 of the trace events. |
19c57fbf MD |
321 | * |
322 | * Create probe callback prototypes. | |
323 | */ | |
324 | ||
f127e61e MD |
325 | /* Reset all macros within TRACEPOINT_EVENT */ |
326 | #include "lttng-events-reset.h" | |
19c57fbf MD |
327 | |
328 | #undef TP_PROTO | |
f127e61e | 329 | #define TP_PROTO(...) __VA_ARGS__ |
19c57fbf | 330 | |
3bc29f0a | 331 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
265822ae | 332 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
19c57fbf MD |
333 | static void __event_probe__##_name(void *__data, _proto); |
334 | ||
3bc29f0a | 335 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
265822ae | 336 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
f7bdf4db MD |
337 | static void __event_probe__##_name(void *__data); |
338 | ||
19c57fbf MD |
339 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
340 | ||
f7bdf4db MD |
341 | /* |
342 | * Stage 4 of the trace events. | |
343 | * | |
40652b65 MD |
344 | * Create static inline function that calculates event size. |
345 | */ | |
346 | ||
f127e61e MD |
347 | /* Reset all macros within TRACEPOINT_EVENT */ |
348 | #include "lttng-events-reset.h" | |
349 | #include "lttng-events-write.h" | |
6db3d13b | 350 | |
f127e61e MD |
351 | #undef _ctf_integer_ext |
352 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \ | |
a90917c3 | 353 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
0d1d4002 | 354 | __event_len += sizeof(_type); |
6db3d13b | 355 | |
f127e61e MD |
356 | #undef _ctf_array_encoded |
357 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \ | |
a90917c3 | 358 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
0d1d4002 | 359 | __event_len += sizeof(_type) * (_length); |
6db3d13b | 360 | |
43803cf2 MD |
361 | #undef _ctf_array_bitfield |
362 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ | |
363 | _ctf_array_encoded(_type, _item, _src, _length, none, _user, _nowrite) | |
364 | ||
f127e61e MD |
365 | #undef _ctf_sequence_encoded |
366 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
57ede728 | 367 | _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ |
f127e61e MD |
368 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_length_type)); \ |
369 | __event_len += sizeof(_length_type); \ | |
a90917c3 | 370 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
f127e61e | 371 | __dynamic_len[__dynamic_len_idx] = (_src_length); \ |
41b59694 MD |
372 | __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ |
373 | __dynamic_len_idx++; | |
6db3d13b | 374 | |
43803cf2 MD |
375 | #undef _ctf_sequence_bitfield |
376 | #define _ctf_sequence_bitfield(_type, _item, _src, \ | |
377 | _length_type, _src_length, \ | |
378 | _user, _nowrite) \ | |
379 | _ctf_sequence_encoded(_type, _item, _src, _length_type, _src_length, \ | |
380 | none, __LITTLE_ENDIAN, 10, _user, _nowrite) | |
381 | ||
d0255731 | 382 | /* |
f127e61e | 383 | * ctf_user_string includes \0. If returns 0, it faulted, so we set size to |
786b8312 | 384 | * 1 (\0 only). |
d0255731 | 385 | */ |
f127e61e MD |
386 | #undef _ctf_string |
387 | #define _ctf_string(_item, _src, _user, _nowrite) \ | |
388 | if (_user) \ | |
389 | __event_len += __dynamic_len[__dynamic_len_idx++] = \ | |
96d0248a | 390 | max_t(size_t, lttng_strlen_user_inatomic(_src), 1); \ |
f127e61e MD |
391 | else \ |
392 | __event_len += __dynamic_len[__dynamic_len_idx++] = \ | |
96d0248a | 393 | strlen(_src) + 1; |
c6e3f225 | 394 | |
0d1d4002 | 395 | #undef TP_PROTO |
f127e61e | 396 | #define TP_PROTO(...) __VA_ARGS__ |
6db3d13b | 397 | |
f127e61e MD |
398 | #undef TP_FIELDS |
399 | #define TP_FIELDS(...) __VA_ARGS__ | |
6db3d13b | 400 | |
7ca580f8 MD |
401 | #undef TP_locvar |
402 | #define TP_locvar(...) __VA_ARGS__ | |
403 | ||
3bc29f0a | 404 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
265822ae | 405 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
7ca580f8 MD |
406 | static inline size_t __event_get_size__##_name(size_t *__dynamic_len, \ |
407 | void *__tp_locvar, _proto) \ | |
0d1d4002 MD |
408 | { \ |
409 | size_t __event_len = 0; \ | |
d3de7f14 | 410 | unsigned int __dynamic_len_idx __attribute__((unused)) = 0; \ |
7ca580f8 | 411 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
d3de7f14 | 412 | \ |
f127e61e | 413 | _fields \ |
d3de7f14 MD |
414 | return __event_len; \ |
415 | } | |
416 | ||
3bc29f0a | 417 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
265822ae | 418 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
7ca580f8 MD |
419 | static inline size_t __event_get_size__##_name(size_t *__dynamic_len, \ |
420 | void *__tp_locvar) \ | |
d3de7f14 MD |
421 | { \ |
422 | size_t __event_len = 0; \ | |
423 | unsigned int __dynamic_len_idx __attribute__((unused)) = 0; \ | |
7ca580f8 | 424 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
0d1d4002 | 425 | \ |
f127e61e | 426 | _fields \ |
0d1d4002 | 427 | return __event_len; \ |
6db3d13b | 428 | } |
40652b65 MD |
429 | |
430 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
431 | ||
f127e61e | 432 | |
40652b65 | 433 | /* |
f127e61e | 434 | * Stage 4.1 of tracepoint event generation. |
e763dbf5 | 435 | * |
f127e61e MD |
436 | * Create static inline function that layout the filter stack data. |
437 | * We make both write and nowrite data available to the filter. | |
e763dbf5 MD |
438 | */ |
439 | ||
f127e61e MD |
440 | /* Reset all macros within TRACEPOINT_EVENT */ |
441 | #include "lttng-events-reset.h" | |
442 | #include "lttng-events-write.h" | |
443 | #include "lttng-events-nowrite.h" | |
444 | ||
445 | #undef _ctf_integer_ext_fetched | |
446 | #define _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) \ | |
447 | if (lttng_is_signed_type(_type)) { \ | |
448 | int64_t __ctf_tmp_int64; \ | |
449 | switch (sizeof(_type)) { \ | |
450 | case 1: \ | |
451 | { \ | |
452 | union { _type t; int8_t v; } __tmp = { (_type) (_src) }; \ | |
453 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ | |
454 | break; \ | |
455 | } \ | |
456 | case 2: \ | |
457 | { \ | |
458 | union { _type t; int16_t v; } __tmp = { (_type) (_src) }; \ | |
459 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ | |
460 | break; \ | |
461 | } \ | |
462 | case 4: \ | |
463 | { \ | |
464 | union { _type t; int32_t v; } __tmp = { (_type) (_src) }; \ | |
465 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ | |
466 | break; \ | |
467 | } \ | |
468 | case 8: \ | |
469 | { \ | |
470 | union { _type t; int64_t v; } __tmp = { (_type) (_src) }; \ | |
471 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ | |
472 | break; \ | |
473 | } \ | |
474 | default: \ | |
475 | BUG_ON(1); \ | |
476 | }; \ | |
477 | memcpy(__stack_data, &__ctf_tmp_int64, sizeof(int64_t)); \ | |
478 | } else { \ | |
479 | uint64_t __ctf_tmp_uint64; \ | |
480 | switch (sizeof(_type)) { \ | |
481 | case 1: \ | |
482 | { \ | |
483 | union { _type t; uint8_t v; } __tmp = { (_type) (_src) }; \ | |
484 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ | |
485 | break; \ | |
486 | } \ | |
487 | case 2: \ | |
488 | { \ | |
489 | union { _type t; uint16_t v; } __tmp = { (_type) (_src) }; \ | |
490 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ | |
491 | break; \ | |
492 | } \ | |
493 | case 4: \ | |
494 | { \ | |
495 | union { _type t; uint32_t v; } __tmp = { (_type) (_src) }; \ | |
496 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ | |
497 | break; \ | |
498 | } \ | |
499 | case 8: \ | |
500 | { \ | |
501 | union { _type t; uint64_t v; } __tmp = { (_type) (_src) }; \ | |
502 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ | |
503 | break; \ | |
504 | } \ | |
505 | default: \ | |
506 | BUG_ON(1); \ | |
507 | }; \ | |
508 | memcpy(__stack_data, &__ctf_tmp_uint64, sizeof(uint64_t)); \ | |
509 | } \ | |
510 | __stack_data += sizeof(int64_t); | |
511 | ||
512 | #undef _ctf_integer_ext_isuser0 | |
513 | #define _ctf_integer_ext_isuser0(_type, _item, _src, _byte_order, _base, _nowrite) \ | |
514 | _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) | |
515 | ||
516 | #undef _ctf_integer_ext_isuser1 | |
517 | #define _ctf_integer_ext_isuser1(_type, _item, _user_src, _byte_order, _base, _nowrite) \ | |
518 | { \ | |
519 | __typeof__(_user_src) _src; \ | |
520 | if (get_user(_src, &(_user_src))) \ | |
521 | _src = 0; \ | |
522 | _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) \ | |
523 | } | |
e763dbf5 | 524 | |
f127e61e MD |
525 | #undef _ctf_integer_ext |
526 | #define _ctf_integer_ext(_type, _item, _user_src, _byte_order, _base, _user, _nowrite) \ | |
527 | _ctf_integer_ext_isuser##_user(_type, _item, _user_src, _byte_order, _base, _nowrite) | |
528 | ||
529 | #undef _ctf_array_encoded | |
530 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \ | |
531 | { \ | |
532 | unsigned long __ctf_tmp_ulong = (unsigned long) (_length); \ | |
533 | const void *__ctf_tmp_ptr = (_src); \ | |
534 | memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \ | |
535 | __stack_data += sizeof(unsigned long); \ | |
6b272cda MD |
536 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \ |
537 | __stack_data += sizeof(void *); \ | |
f127e61e MD |
538 | } |
539 | ||
43803cf2 MD |
540 | #undef _ctf_array_bitfield |
541 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ | |
542 | _ctf_array_encoded(_type, _item, _src, _length, none, _user, _nowrite) | |
543 | ||
f127e61e MD |
544 | #undef _ctf_sequence_encoded |
545 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
57ede728 | 546 | _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ |
f127e61e MD |
547 | { \ |
548 | unsigned long __ctf_tmp_ulong = (unsigned long) (_src_length); \ | |
549 | const void *__ctf_tmp_ptr = (_src); \ | |
550 | memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \ | |
551 | __stack_data += sizeof(unsigned long); \ | |
6b272cda MD |
552 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \ |
553 | __stack_data += sizeof(void *); \ | |
f127e61e MD |
554 | } |
555 | ||
43803cf2 MD |
556 | #undef _ctf_sequence_bitfield |
557 | #define _ctf_sequence_bitfield(_type, _item, _src, \ | |
558 | _length_type, _src_length, \ | |
559 | _user, _nowrite) \ | |
560 | _ctf_sequence_encoded(_type, _item, _src, _length_type, _src_length, \ | |
561 | none, __LITTLE_ENDIAN, 10, _user, _nowrite) | |
562 | ||
f127e61e MD |
563 | #undef _ctf_string |
564 | #define _ctf_string(_item, _src, _user, _nowrite) \ | |
565 | { \ | |
566 | const void *__ctf_tmp_ptr = (_src); \ | |
6b272cda MD |
567 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \ |
568 | __stack_data += sizeof(void *); \ | |
f127e61e | 569 | } |
c6e3f225 | 570 | |
e763dbf5 | 571 | #undef TP_PROTO |
f127e61e | 572 | #define TP_PROTO(...) __VA_ARGS__ |
e763dbf5 | 573 | |
f127e61e MD |
574 | #undef TP_FIELDS |
575 | #define TP_FIELDS(...) __VA_ARGS__ | |
e763dbf5 | 576 | |
7ca580f8 MD |
577 | #undef TP_locvar |
578 | #define TP_locvar(...) __VA_ARGS__ | |
579 | ||
f127e61e | 580 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
265822ae | 581 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
f127e61e MD |
582 | static inline \ |
583 | void __event_prepare_filter_stack__##_name(char *__stack_data, \ | |
584 | void *__tp_locvar) \ | |
e763dbf5 | 585 | { \ |
7ca580f8 MD |
586 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
587 | \ | |
f127e61e | 588 | _fields \ |
e763dbf5 MD |
589 | } |
590 | ||
f127e61e | 591 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
265822ae | 592 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
f127e61e MD |
593 | static inline \ |
594 | void __event_prepare_filter_stack__##_name(char *__stack_data, \ | |
595 | void *__tp_locvar, _proto) \ | |
d3de7f14 | 596 | { \ |
7ca580f8 MD |
597 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
598 | \ | |
f127e61e | 599 | _fields \ |
d3de7f14 MD |
600 | } |
601 | ||
e763dbf5 MD |
602 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
603 | ||
e763dbf5 | 604 | /* |
f127e61e | 605 | * Stage 5 of the trace events. |
40652b65 | 606 | * |
f127e61e | 607 | * Create static inline function that calculates event payload alignment. |
3c4ffab9 MD |
608 | */ |
609 | ||
f127e61e MD |
610 | /* Reset all macros within TRACEPOINT_EVENT */ |
611 | #include "lttng-events-reset.h" | |
612 | #include "lttng-events-write.h" | |
3c4ffab9 | 613 | |
f127e61e MD |
614 | #undef _ctf_integer_ext |
615 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \ | |
616 | __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); | |
3c4ffab9 | 617 | |
f127e61e MD |
618 | #undef _ctf_array_encoded |
619 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \ | |
620 | __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); | |
3c4ffab9 | 621 | |
43803cf2 MD |
622 | #undef _ctf_array_bitfield |
623 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ | |
624 | _ctf_array_encoded(_type, _item, _src, _length, none, _user, _nowrite) | |
625 | ||
f127e61e MD |
626 | #undef _ctf_sequence_encoded |
627 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
57ede728 | 628 | _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ |
f127e61e MD |
629 | __event_align = max_t(size_t, __event_align, lttng_alignof(_length_type)); \ |
630 | __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); | |
64c796d8 | 631 | |
43803cf2 MD |
632 | #undef _ctf_sequence_bitfield |
633 | #define _ctf_sequence_bitfield(_type, _item, _src, \ | |
634 | _length_type, _src_length, \ | |
635 | _user, _nowrite) \ | |
636 | _ctf_sequence_encoded(_type, _item, _src, _length_type, _src_length, \ | |
637 | none, __LITTLE_ENDIAN, 10, _user, _nowrite) | |
638 | ||
f127e61e MD |
639 | #undef _ctf_string |
640 | #define _ctf_string(_item, _src, _user, _nowrite) | |
64c796d8 | 641 | |
f127e61e MD |
642 | #undef TP_PROTO |
643 | #define TP_PROTO(...) __VA_ARGS__ | |
84da5206 | 644 | |
f127e61e MD |
645 | #undef TP_FIELDS |
646 | #define TP_FIELDS(...) __VA_ARGS__ | |
c6e3f225 | 647 | |
f127e61e MD |
648 | #undef TP_locvar |
649 | #define TP_locvar(...) __VA_ARGS__ | |
3c4ffab9 | 650 | |
f127e61e | 651 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
265822ae | 652 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
f127e61e MD |
653 | static inline size_t __event_get_align__##_name(void *__tp_locvar, _proto) \ |
654 | { \ | |
655 | size_t __event_align = 1; \ | |
656 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ | |
657 | \ | |
658 | _fields \ | |
659 | return __event_align; \ | |
660 | } | |
3c4ffab9 | 661 | |
3bc29f0a | 662 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
265822ae | 663 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
f127e61e MD |
664 | static inline size_t __event_get_align__##_name(void *__tp_locvar) \ |
665 | { \ | |
666 | size_t __event_align = 1; \ | |
667 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ | |
668 | \ | |
669 | _fields \ | |
670 | return __event_align; \ | |
671 | } | |
d3de7f14 | 672 | |
3c4ffab9 MD |
673 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
674 | ||
3c4ffab9 | 675 | /* |
f127e61e | 676 | * Stage 6 of tracepoint event generation. |
e763dbf5 | 677 | * |
f127e61e MD |
678 | * Create the probe function. This function calls event size calculation |
679 | * and writes event data into the buffer. | |
40652b65 MD |
680 | */ |
681 | ||
f127e61e MD |
682 | /* Reset all macros within TRACEPOINT_EVENT */ |
683 | #include "lttng-events-reset.h" | |
684 | #include "lttng-events-write.h" | |
c6e3f225 | 685 | |
f127e61e MD |
686 | #undef _ctf_integer_ext_fetched |
687 | #define _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) \ | |
e763dbf5 | 688 | { \ |
f127e61e MD |
689 | _type __tmp = _src; \ |
690 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ | |
aaa4004a | 691 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ |
f127e61e MD |
692 | } |
693 | ||
694 | #undef _ctf_integer_ext_isuser0 | |
695 | #define _ctf_integer_ext_isuser0(_type, _item, _src, _byte_order, _base, _nowrite) \ | |
696 | _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) | |
697 | ||
698 | #undef _ctf_integer_ext_isuser1 | |
699 | #define _ctf_integer_ext_isuser1(_type, _item, _user_src, _byte_order, _base, _nowrite) \ | |
700 | { \ | |
701 | __typeof__(_user_src) _src; \ | |
702 | if (get_user(_src, &(_user_src))) \ | |
703 | _src = 0; \ | |
704 | _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) \ | |
705 | } | |
706 | ||
707 | #undef _ctf_integer_ext | |
708 | #define _ctf_integer_ext(_type, _item, _user_src, _byte_order, _base, _user, _nowrite) \ | |
709 | _ctf_integer_ext_isuser##_user(_type, _item, _user_src, _byte_order, _base, _nowrite) | |
710 | ||
711 | #undef _ctf_array_encoded | |
712 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \ | |
713 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
714 | if (_user) { \ | |
715 | __chan->ops->event_write_from_user(&__ctx, _src, sizeof(_type) * (_length)); \ | |
716 | } else { \ | |
717 | __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); \ | |
718 | } | |
719 | ||
43803cf2 MD |
720 | #if (__BYTE_ORDER == __LITTLE_ENDIAN) |
721 | #undef _ctf_array_bitfield | |
722 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ | |
723 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
724 | if (_user) { \ | |
725 | __chan->ops->event_write_from_user(&__ctx, _src, sizeof(_type) * (_length)); \ | |
726 | } else { \ | |
727 | __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); \ | |
728 | } | |
729 | #else /* #if (__BYTE_ORDER == __LITTLE_ENDIAN) */ | |
730 | /* | |
731 | * For big endian, we need to byteswap into little endian. | |
732 | */ | |
733 | #undef _ctf_array_bitfield | |
734 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ | |
735 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
736 | { \ | |
737 | size_t _i; \ | |
738 | \ | |
739 | for (_i = 0; _i < (_length); _i++) { \ | |
740 | _type _tmp; \ | |
741 | \ | |
742 | if (_user) { \ | |
743 | if (get_user(_tmp, (_type *) _src + _i)) \ | |
744 | _tmp = 0; \ | |
745 | } else { \ | |
746 | _tmp = ((_type *) _src)[_i]; \ | |
747 | } \ | |
748 | switch (sizeof(_type)) { \ | |
749 | case 1: \ | |
750 | break; \ | |
751 | case 2: \ | |
752 | _tmp = cpu_to_le16(_tmp); \ | |
753 | break; \ | |
754 | case 4: \ | |
755 | _tmp = cpu_to_le32(_tmp); \ | |
756 | break; \ | |
757 | case 8: \ | |
758 | _tmp = cpu_to_le64(_tmp); \ | |
759 | break; \ | |
760 | default: \ | |
761 | BUG_ON(1); \ | |
762 | } \ | |
763 | __chan->ops->event_write(&__ctx, &_tmp, sizeof(_type)); \ | |
764 | } \ | |
765 | } | |
766 | #endif /* #else #if (__BYTE_ORDER == __LITTLE_ENDIAN) */ | |
767 | ||
f127e61e MD |
768 | #undef _ctf_sequence_encoded |
769 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
57ede728 | 770 | _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ |
84da5206 | 771 | { \ |
f127e61e MD |
772 | _length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx]; \ |
773 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ | |
774 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ | |
84da5206 | 775 | } \ |
f127e61e MD |
776 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ |
777 | if (_user) { \ | |
778 | __chan->ops->event_write_from_user(&__ctx, _src, \ | |
779 | sizeof(_type) * __get_dynamic_len(dest)); \ | |
780 | } else { \ | |
781 | __chan->ops->event_write(&__ctx, _src, \ | |
782 | sizeof(_type) * __get_dynamic_len(dest)); \ | |
783 | } | |
784 | ||
43803cf2 MD |
785 | #if (__BYTE_ORDER == __LITTLE_ENDIAN) |
786 | #undef _ctf_sequence_bitfield | |
787 | #define _ctf_sequence_bitfield(_type, _item, _src, \ | |
788 | _length_type, _src_length, \ | |
789 | _user, _nowrite) \ | |
790 | { \ | |
791 | _length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx] * sizeof(_type) * CHAR_BIT; \ | |
792 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ | |
793 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ | |
794 | } \ | |
795 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
796 | if (_user) { \ | |
797 | __chan->ops->event_write_from_user(&__ctx, _src, \ | |
798 | sizeof(_type) * __get_dynamic_len(dest)); \ | |
799 | } else { \ | |
800 | __chan->ops->event_write(&__ctx, _src, \ | |
801 | sizeof(_type) * __get_dynamic_len(dest)); \ | |
802 | } | |
803 | #else /* #if (__BYTE_ORDER == __LITTLE_ENDIAN) */ | |
804 | /* | |
805 | * For big endian, we need to byteswap into little endian. | |
806 | */ | |
807 | #undef _ctf_sequence_bitfield | |
808 | #define _ctf_sequence_bitfield(_type, _item, _src, \ | |
809 | _length_type, _src_length, \ | |
810 | _user, _nowrite) \ | |
811 | { \ | |
812 | _length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx] * sizeof(_type) * CHAR_BIT; \ | |
813 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ | |
814 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ | |
815 | } \ | |
816 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
817 | { \ | |
818 | size_t _i, _length; \ | |
819 | \ | |
820 | _length = __get_dynamic_len(dest); \ | |
821 | for (_i = 0; _i < _length; _i++) { \ | |
822 | _type _tmp; \ | |
823 | \ | |
824 | if (_user) { \ | |
825 | if (get_user(_tmp, (_type *) _src + _i)) \ | |
826 | _tmp = 0; \ | |
827 | } else { \ | |
828 | _tmp = ((_type *) _src)[_i]; \ | |
829 | } \ | |
830 | switch (sizeof(_type)) { \ | |
831 | case 1: \ | |
832 | break; \ | |
833 | case 2: \ | |
834 | _tmp = cpu_to_le16(_tmp); \ | |
835 | break; \ | |
836 | case 4: \ | |
837 | _tmp = cpu_to_le32(_tmp); \ | |
838 | break; \ | |
839 | case 8: \ | |
840 | _tmp = cpu_to_le64(_tmp); \ | |
841 | break; \ | |
842 | default: \ | |
843 | BUG_ON(1); \ | |
844 | } \ | |
845 | __chan->ops->event_write(&__ctx, &_tmp, sizeof(_type)); \ | |
846 | } \ | |
847 | } | |
848 | #endif /* #else #if (__BYTE_ORDER == __LITTLE_ENDIAN) */ | |
849 | ||
f127e61e MD |
850 | #undef _ctf_string |
851 | #define _ctf_string(_item, _src, _user, _nowrite) \ | |
852 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src))); \ | |
853 | if (_user) { \ | |
854 | __chan->ops->event_strcpy_from_user(&__ctx, _src, \ | |
855 | __get_dynamic_len(dest)); \ | |
856 | } else { \ | |
857 | __chan->ops->event_strcpy(&__ctx, _src, \ | |
858 | __get_dynamic_len(dest)); \ | |
859 | } | |
e763dbf5 MD |
860 | |
861 | /* Beware: this get len actually consumes the len value */ | |
f127e61e MD |
862 | #undef __get_dynamic_len |
863 | #define __get_dynamic_len(field) __stackvar.__dynamic_len[__dynamic_len_idx++] | |
e763dbf5 MD |
864 | |
865 | #undef TP_PROTO | |
f127e61e | 866 | #define TP_PROTO(...) __VA_ARGS__ |
e763dbf5 MD |
867 | |
868 | #undef TP_ARGS | |
f127e61e | 869 | #define TP_ARGS(...) __VA_ARGS__ |
e763dbf5 | 870 | |
f127e61e MD |
871 | #undef TP_FIELDS |
872 | #define TP_FIELDS(...) __VA_ARGS__ | |
e763dbf5 | 873 | |
7ca580f8 MD |
874 | #undef TP_locvar |
875 | #define TP_locvar(...) __VA_ARGS__ | |
876 | ||
265822ae MD |
877 | #undef TP_code_pre |
878 | #define TP_code_pre(...) __VA_ARGS__ | |
879 | ||
880 | #undef TP_code_post | |
881 | #define TP_code_post(...) __VA_ARGS__ | |
7ca580f8 | 882 | |
c337ddc2 MD |
883 | /* |
884 | * For state dump, check that "session" argument (mandatory) matches the | |
885 | * session this event belongs to. Ensures that we write state dump data only | |
886 | * into the started session, not into all sessions. | |
887 | */ | |
888 | #ifdef TP_SESSION_CHECK | |
889 | #define _TP_SESSION_CHECK(session, csession) (session == csession) | |
890 | #else /* TP_SESSION_CHECK */ | |
891 | #define _TP_SESSION_CHECK(session, csession) 1 | |
892 | #endif /* TP_SESSION_CHECK */ | |
893 | ||
f9771d39 | 894 | /* |
f127e61e MD |
895 | * Using twice size for filter stack data to hold size and pointer for |
896 | * each field (worse case). For integers, max size required is 64-bit. | |
897 | * Same for double-precision floats. Those fit within | |
898 | * 2*sizeof(unsigned long) for all supported architectures. | |
899 | * Perform UNION (||) of filter runtime list. | |
f9771d39 | 900 | */ |
3bc29f0a | 901 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
265822ae | 902 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
e763dbf5 MD |
903 | static void __event_probe__##_name(void *__data, _proto) \ |
904 | { \ | |
7ca580f8 | 905 | struct probe_local_vars { _locvar }; \ |
a90917c3 | 906 | struct lttng_event *__event = __data; \ |
79150a49 JD |
907 | struct lttng_probe_ctx __lttng_probe_ctx = { \ |
908 | .event = __event, \ | |
ccecf3fb | 909 | .interruptible = !irqs_disabled(), \ |
79150a49 | 910 | }; \ |
a90917c3 | 911 | struct lttng_channel *__chan = __event->chan; \ |
e0130fab | 912 | struct lttng_session *__session = __chan->session; \ |
aaa4004a | 913 | struct lib_ring_buffer_ctx __ctx; \ |
e763dbf5 | 914 | size_t __event_len, __event_align; \ |
d3de7f14 | 915 | size_t __dynamic_len_idx __attribute__((unused)) = 0; \ |
f127e61e MD |
916 | union { \ |
917 | size_t __dynamic_len[ARRAY_SIZE(__event_fields___##_name)]; \ | |
918 | char __filter_stack_data[2 * sizeof(unsigned long) * ARRAY_SIZE(__event_fields___##_name)]; \ | |
919 | } __stackvar; \ | |
e763dbf5 | 920 | int __ret; \ |
7ca580f8 MD |
921 | struct probe_local_vars __tp_locvar; \ |
922 | struct probe_local_vars *tp_locvar __attribute__((unused)) = \ | |
923 | &__tp_locvar; \ | |
e0130fab | 924 | struct lttng_pid_tracker *__lpf; \ |
e763dbf5 | 925 | \ |
e0130fab | 926 | if (!_TP_SESSION_CHECK(session, __session)) \ |
c337ddc2 | 927 | return; \ |
e0130fab | 928 | if (unlikely(!ACCESS_ONCE(__session->active))) \ |
e64957da MD |
929 | return; \ |
930 | if (unlikely(!ACCESS_ONCE(__chan->enabled))) \ | |
931 | return; \ | |
932 | if (unlikely(!ACCESS_ONCE(__event->enabled))) \ | |
52fc2e1f | 933 | return; \ |
7a09dcb7 | 934 | __lpf = lttng_rcu_dereference(__session->pid_tracker); \ |
e0130fab MD |
935 | if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid))) \ |
936 | return; \ | |
265822ae | 937 | _code_pre \ |
f127e61e MD |
938 | if (unlikely(!list_empty(&__event->bytecode_runtime_head))) { \ |
939 | struct lttng_bytecode_runtime *bc_runtime; \ | |
940 | int __filter_record = __event->has_enablers_without_bytecode; \ | |
941 | \ | |
942 | __event_prepare_filter_stack__##_name(__stackvar.__filter_stack_data, \ | |
943 | tp_locvar, _args); \ | |
7a09dcb7 | 944 | lttng_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \ |
79150a49 | 945 | if (unlikely(bc_runtime->filter(bc_runtime, &__lttng_probe_ctx, \ |
f127e61e MD |
946 | __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \ |
947 | __filter_record = 1; \ | |
948 | } \ | |
949 | if (likely(!__filter_record)) \ | |
265822ae | 950 | goto __post; \ |
f127e61e MD |
951 | } \ |
952 | __event_len = __event_get_size__##_name(__stackvar.__dynamic_len, \ | |
953 | tp_locvar, _args); \ | |
7ca580f8 | 954 | __event_align = __event_get_align__##_name(tp_locvar, _args); \ |
79150a49 | 955 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, &__lttng_probe_ctx, __event_len, \ |
e763dbf5 | 956 | __event_align, -1); \ |
aaa4004a | 957 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ |
e763dbf5 | 958 | if (__ret < 0) \ |
265822ae | 959 | goto __post; \ |
f127e61e | 960 | _fields \ |
aaa4004a | 961 | __chan->ops->event_commit(&__ctx); \ |
265822ae MD |
962 | __post: \ |
963 | _code_post \ | |
964 | return; \ | |
e763dbf5 MD |
965 | } |
966 | ||
3bc29f0a | 967 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
265822ae | 968 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
f7bdf4db MD |
969 | static void __event_probe__##_name(void *__data) \ |
970 | { \ | |
7ca580f8 | 971 | struct probe_local_vars { _locvar }; \ |
a90917c3 | 972 | struct lttng_event *__event = __data; \ |
79150a49 JD |
973 | struct lttng_probe_ctx __lttng_probe_ctx = { \ |
974 | .event = __event, \ | |
ccecf3fb | 975 | .interruptible = !irqs_disabled(), \ |
79150a49 | 976 | }; \ |
a90917c3 | 977 | struct lttng_channel *__chan = __event->chan; \ |
e0130fab | 978 | struct lttng_session *__session = __chan->session; \ |
f7bdf4db MD |
979 | struct lib_ring_buffer_ctx __ctx; \ |
980 | size_t __event_len, __event_align; \ | |
d3de7f14 | 981 | size_t __dynamic_len_idx __attribute__((unused)) = 0; \ |
f127e61e MD |
982 | union { \ |
983 | size_t __dynamic_len[ARRAY_SIZE(__event_fields___##_name)]; \ | |
984 | char __filter_stack_data[2 * sizeof(unsigned long) * ARRAY_SIZE(__event_fields___##_name)]; \ | |
985 | } __stackvar; \ | |
f7bdf4db | 986 | int __ret; \ |
7ca580f8 MD |
987 | struct probe_local_vars __tp_locvar; \ |
988 | struct probe_local_vars *tp_locvar __attribute__((unused)) = \ | |
989 | &__tp_locvar; \ | |
e0130fab | 990 | struct lttng_pid_tracker *__lpf; \ |
f7bdf4db | 991 | \ |
e0130fab | 992 | if (!_TP_SESSION_CHECK(session, __session)) \ |
c337ddc2 | 993 | return; \ |
e0130fab | 994 | if (unlikely(!ACCESS_ONCE(__session->active))) \ |
f7bdf4db MD |
995 | return; \ |
996 | if (unlikely(!ACCESS_ONCE(__chan->enabled))) \ | |
997 | return; \ | |
998 | if (unlikely(!ACCESS_ONCE(__event->enabled))) \ | |
999 | return; \ | |
7a09dcb7 | 1000 | __lpf = lttng_rcu_dereference(__session->pid_tracker); \ |
e0130fab MD |
1001 | if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid))) \ |
1002 | return; \ | |
265822ae | 1003 | _code_pre \ |
f127e61e MD |
1004 | if (unlikely(!list_empty(&__event->bytecode_runtime_head))) { \ |
1005 | struct lttng_bytecode_runtime *bc_runtime; \ | |
1006 | int __filter_record = __event->has_enablers_without_bytecode; \ | |
1007 | \ | |
1008 | __event_prepare_filter_stack__##_name(__stackvar.__filter_stack_data, \ | |
1009 | tp_locvar); \ | |
7a09dcb7 | 1010 | lttng_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \ |
79150a49 | 1011 | if (unlikely(bc_runtime->filter(bc_runtime, &__lttng_probe_ctx, \ |
f127e61e MD |
1012 | __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \ |
1013 | __filter_record = 1; \ | |
1014 | } \ | |
1015 | if (likely(!__filter_record)) \ | |
265822ae | 1016 | goto __post; \ |
f127e61e MD |
1017 | } \ |
1018 | __event_len = __event_get_size__##_name(__stackvar.__dynamic_len, tp_locvar); \ | |
7ca580f8 | 1019 | __event_align = __event_get_align__##_name(tp_locvar); \ |
79150a49 | 1020 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, &__lttng_probe_ctx, __event_len, \ |
f7bdf4db MD |
1021 | __event_align, -1); \ |
1022 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ | |
1023 | if (__ret < 0) \ | |
265822ae | 1024 | goto __post; \ |
f127e61e | 1025 | _fields \ |
f7bdf4db | 1026 | __chan->ops->event_commit(&__ctx); \ |
265822ae MD |
1027 | __post: \ |
1028 | _code_post \ | |
1029 | return; \ | |
f7bdf4db MD |
1030 | } |
1031 | ||
e763dbf5 MD |
1032 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
1033 | ||
f127e61e MD |
1034 | #undef __get_dynamic_len |
1035 | ||
1036 | /* | |
1037 | * Stage 7 of the trace events. | |
1038 | * | |
1039 | * Create event descriptions. | |
1040 | */ | |
1041 | ||
1042 | /* Named field types must be defined in lttng-types.h */ | |
1043 | ||
1044 | #include "lttng-events-reset.h" /* Reset all macros within LTTNG_TRACEPOINT_EVENT */ | |
1045 | ||
1046 | #ifndef TP_PROBE_CB | |
1047 | #define TP_PROBE_CB(_template) &__event_probe__##_template | |
1048 | #endif | |
1049 | ||
1050 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS | |
1051 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ | |
1052 | static const struct lttng_event_desc __event_desc___##_map = { \ | |
1053 | .fields = __event_fields___##_template, \ | |
1054 | .name = #_map, \ | |
1055 | .kname = #_name, \ | |
1056 | .probe_callback = (void *) TP_PROBE_CB(_template), \ | |
1057 | .nr_fields = ARRAY_SIZE(__event_fields___##_template), \ | |
1058 | .owner = THIS_MODULE, \ | |
1059 | }; | |
1060 | ||
1061 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP | |
1062 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ | |
1063 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) | |
1064 | ||
1065 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
1066 | ||
1067 | /* | |
1068 | * Stage 8 of the trace events. | |
1069 | * | |
1070 | * Create an array of event description pointers. | |
1071 | */ | |
1072 | ||
1073 | #include "lttng-events-reset.h" /* Reset all macros within LTTNG_TRACEPOINT_EVENT */ | |
1074 | ||
1075 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS | |
1076 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ | |
1077 | &__event_desc___##_map, | |
1078 | ||
1079 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP | |
1080 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ | |
1081 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) | |
1082 | ||
1083 | #define TP_ID1(_token, _system) _token##_system | |
1084 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
1085 | ||
1086 | static const struct lttng_event_desc *TP_ID(__event_desc___, TRACE_SYSTEM)[] = { | |
1087 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
1088 | }; | |
1089 | ||
1090 | #undef TP_ID1 | |
1091 | #undef TP_ID | |
1092 | ||
1093 | /* | |
1094 | * Stage 9 of the trace events. | |
1095 | * | |
1096 | * Create a toplevel descriptor for the whole probe. | |
1097 | */ | |
1098 | ||
1099 | #define TP_ID1(_token, _system) _token##_system | |
1100 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
1101 | ||
1102 | /* non-const because list head will be modified when registered. */ | |
1103 | static __used struct lttng_probe_desc TP_ID(__probe_desc___, TRACE_SYSTEM) = { | |
1104 | .provider = __stringify(TRACE_SYSTEM), | |
1105 | .event_desc = TP_ID(__event_desc___, TRACE_SYSTEM), | |
1106 | .nr_events = ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)), | |
1107 | .head = { NULL, NULL }, | |
1108 | .lazy_init_head = { NULL, NULL }, | |
1109 | .lazy = 0, | |
1110 | }; | |
1111 | ||
1112 | #undef TP_ID1 | |
1113 | #undef TP_ID | |
1114 | ||
3afe7aac | 1115 | /* |
c099397a | 1116 | * Stage 10 of the trace events. |
3afe7aac MD |
1117 | * |
1118 | * Register/unregister probes at module load/unload. | |
1119 | */ | |
1120 | ||
f127e61e | 1121 | #include "lttng-events-reset.h" /* Reset all macros within LTTNG_TRACEPOINT_EVENT */ |
3afe7aac MD |
1122 | |
1123 | #define TP_ID1(_token, _system) _token##_system | |
1124 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
1125 | #define module_init_eval1(_token, _system) module_init(_token##_system) | |
1126 | #define module_init_eval(_token, _system) module_init_eval1(_token, _system) | |
1127 | #define module_exit_eval1(_token, _system) module_exit(_token##_system) | |
1128 | #define module_exit_eval(_token, _system) module_exit_eval1(_token, _system) | |
1129 | ||
2655f9ad | 1130 | #ifndef TP_MODULE_NOINIT |
3afe7aac MD |
1131 | static int TP_ID(__lttng_events_init__, TRACE_SYSTEM)(void) |
1132 | { | |
6d2a620c | 1133 | wrapper_vmalloc_sync_all(); |
a90917c3 | 1134 | return lttng_probe_register(&TP_ID(__probe_desc___, TRACE_SYSTEM)); |
3afe7aac MD |
1135 | } |
1136 | ||
3afe7aac MD |
1137 | static void TP_ID(__lttng_events_exit__, TRACE_SYSTEM)(void) |
1138 | { | |
a90917c3 | 1139 | lttng_probe_unregister(&TP_ID(__probe_desc___, TRACE_SYSTEM)); |
3afe7aac MD |
1140 | } |
1141 | ||
2655f9ad MD |
1142 | #ifndef TP_MODULE_NOAUTOLOAD |
1143 | module_init_eval(__lttng_events_init__, TRACE_SYSTEM); | |
3afe7aac | 1144 | module_exit_eval(__lttng_events_exit__, TRACE_SYSTEM); |
259b6cb3 | 1145 | #endif |
3afe7aac | 1146 | |
2655f9ad MD |
1147 | #endif |
1148 | ||
3afe7aac MD |
1149 | #undef module_init_eval |
1150 | #undef module_exit_eval | |
1151 | #undef TP_ID1 | |
1152 | #undef TP_ID | |
177b3692 MD |
1153 | |
1154 | #undef TP_PROTO | |
1155 | #undef TP_ARGS |