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> | |
85522867 | 32 | #include <wrapper/ringbuffer/backend.h> |
8d43abb7 MD |
33 | #include <wrapper/rcu.h> |
34 | #include <lttng-events.h> | |
35 | #include <lttng-tracer-core.h> | |
40652b65 | 36 | |
40652b65 | 37 | /* |
6db3d13b | 38 | * Macro declarations used for all stages. |
40652b65 MD |
39 | */ |
40 | ||
76e4f017 MD |
41 | /* |
42 | * LTTng name mapping macros. LTTng remaps some of the kernel events to | |
43 | * enforce name-spacing. | |
44 | */ | |
3bc29f0a | 45 | #undef LTTNG_TRACEPOINT_EVENT_MAP |
f127e61e | 46 | #define LTTNG_TRACEPOINT_EVENT_MAP(name, map, proto, args, fields) \ |
3bc29f0a | 47 | LTTNG_TRACEPOINT_EVENT_CLASS(map, \ |
76e4f017 MD |
48 | PARAMS(proto), \ |
49 | PARAMS(args), \ | |
f127e61e | 50 | PARAMS(fields)) \ |
3bc29f0a | 51 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), PARAMS(args)) |
76e4f017 | 52 | |
3bc29f0a | 53 | #undef LTTNG_TRACEPOINT_EVENT_MAP_NOARGS |
f127e61e | 54 | #define LTTNG_TRACEPOINT_EVENT_MAP_NOARGS(name, map, fields) \ |
3bc29f0a | 55 | LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(map, \ |
f127e61e | 56 | PARAMS(fields)) \ |
3bc29f0a | 57 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(map, name, map) |
76e4f017 | 58 | |
f127e61e | 59 | #undef LTTNG_TRACEPOINT_EVENT_CODE_MAP |
265822ae | 60 | #define LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, map, proto, args, _locvar, _code_pre, fields, _code_post) \ |
f127e61e MD |
61 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE(map, \ |
62 | PARAMS(proto), \ | |
63 | PARAMS(args), \ | |
64 | PARAMS(_locvar), \ | |
265822ae MD |
65 | PARAMS(_code_pre), \ |
66 | PARAMS(fields), \ | |
67 | PARAMS(_code_post)) \ | |
f127e61e MD |
68 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), PARAMS(args)) |
69 | ||
3bc29f0a | 70 | #undef LTTNG_TRACEPOINT_EVENT_CODE |
265822ae | 71 | #define LTTNG_TRACEPOINT_EVENT_CODE(name, proto, args, _locvar, _code_pre, fields, _code_post) \ |
f127e61e | 72 | LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, name, \ |
7ca580f8 MD |
73 | PARAMS(proto), \ |
74 | PARAMS(args), \ | |
75 | PARAMS(_locvar), \ | |
265822ae MD |
76 | PARAMS(_code_pre), \ |
77 | PARAMS(fields), \ | |
78 | PARAMS(_code_post)) | |
fcf7fa33 | 79 | |
40652b65 | 80 | /* |
3bc29f0a MD |
81 | * LTTNG_TRACEPOINT_EVENT_CLASS can be used to add a generic function |
82 | * handlers for events. That is, if all events have the same parameters | |
83 | * and just have distinct trace points. Each tracepoint can be defined | |
84 | * with LTTNG_TRACEPOINT_EVENT_INSTANCE and that will map the | |
85 | * LTTNG_TRACEPOINT_EVENT_CLASS to the tracepoint. | |
40652b65 | 86 | * |
3bc29f0a MD |
87 | * LTTNG_TRACEPOINT_EVENT is a one to one mapping between tracepoint and |
88 | * template. | |
40652b65 | 89 | */ |
6db3d13b | 90 | |
3bc29f0a | 91 | #undef LTTNG_TRACEPOINT_EVENT |
f127e61e | 92 | #define LTTNG_TRACEPOINT_EVENT(name, proto, args, fields) \ |
3bc29f0a MD |
93 | LTTNG_TRACEPOINT_EVENT_MAP(name, name, \ |
94 | PARAMS(proto), \ | |
95 | PARAMS(args), \ | |
f127e61e | 96 | PARAMS(fields)) |
40652b65 | 97 | |
3bc29f0a | 98 | #undef LTTNG_TRACEPOINT_EVENT_NOARGS |
f127e61e MD |
99 | #define LTTNG_TRACEPOINT_EVENT_NOARGS(name, fields) \ |
100 | LTTNG_TRACEPOINT_EVENT_MAP_NOARGS(name, name, PARAMS(fields)) | |
76e4f017 | 101 | |
3bc29f0a MD |
102 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE |
103 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE(template, name, proto, args) \ | |
104 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(template, name, name, PARAMS(proto), PARAMS(args)) | |
76e4f017 | 105 | |
3bc29f0a MD |
106 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS |
107 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(template, name) \ | |
108 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(template, name, name) | |
76e4f017 | 109 | |
3bc29f0a | 110 | #undef LTTNG_TRACEPOINT_EVENT_CLASS |
f127e61e | 111 | #define LTTNG_TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ |
3bc29f0a | 112 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, PARAMS(_proto), PARAMS(_args), , , \ |
265822ae | 113 | PARAMS(_fields), ) |
7ca580f8 | 114 | |
3bc29f0a | 115 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS |
f127e61e | 116 | #define LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ |
265822ae | 117 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, , , PARAMS(_fields), ) |
7ca580f8 MD |
118 | |
119 | ||
f62b389e | 120 | /* |
c099397a | 121 | * Stage 1 of the trace events. |
f62b389e MD |
122 | * |
123 | * Create dummy trace calls for each events, verifying that the LTTng module | |
3bc29f0a MD |
124 | * instrumentation headers match the kernel arguments. Will be optimized |
125 | * out by the compiler. | |
f62b389e MD |
126 | */ |
127 | ||
f127e61e | 128 | /* Reset all macros within TRACEPOINT_EVENT */ |
ba012e22 | 129 | #include <probes/lttng-events-reset.h> |
f62b389e MD |
130 | |
131 | #undef TP_PROTO | |
f127e61e | 132 | #define TP_PROTO(...) __VA_ARGS__ |
f62b389e MD |
133 | |
134 | #undef TP_ARGS | |
f127e61e | 135 | #define TP_ARGS(...) __VA_ARGS__ |
f62b389e | 136 | |
3bc29f0a MD |
137 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP |
138 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ | |
7eb827f2 | 139 | void trace_##_name(_proto); |
f62b389e | 140 | |
3bc29f0a MD |
141 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS |
142 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ | |
cb1aa0c7 | 143 | void trace_##_name(void); |
f7bdf4db | 144 | |
f62b389e MD |
145 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
146 | ||
d0558de2 MD |
147 | /* |
148 | * Stage 1.1 of the trace events. | |
149 | * | |
150 | * Create dummy trace prototypes for each event class, and for each used | |
151 | * template. This will allow checking whether the prototypes from the | |
152 | * class and the instance using the class actually match. | |
153 | */ | |
154 | ||
ba012e22 | 155 | #include <probes/lttng-events-reset.h> /* Reset all macros within TRACE_EVENT */ |
d0558de2 MD |
156 | |
157 | #undef TP_PROTO | |
158 | #define TP_PROTO(...) __VA_ARGS__ | |
159 | ||
160 | #undef TP_ARGS | |
161 | #define TP_ARGS(...) __VA_ARGS__ | |
162 | ||
163 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP | |
164 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ | |
165 | void __event_template_proto___##_template(_proto); | |
166 | ||
167 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS | |
168 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ | |
169 | void __event_template_proto___##_template(void); | |
170 | ||
171 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE | |
265822ae | 172 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
d0558de2 MD |
173 | void __event_template_proto___##_name(_proto); |
174 | ||
175 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS | |
265822ae | 176 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
d0558de2 MD |
177 | void __event_template_proto___##_name(void); |
178 | ||
179 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
180 | ||
6db3d13b | 181 | /* |
c099397a | 182 | * Stage 2 of the trace events. |
6db3d13b MD |
183 | * |
184 | * Create event field type metadata section. | |
185 | * Each event produce an array of fields. | |
186 | */ | |
187 | ||
f127e61e | 188 | /* Reset all macros within TRACEPOINT_EVENT */ |
ba012e22 MD |
189 | #include <probes/lttng-events-reset.h> |
190 | #include <probes/lttng-events-write.h> | |
191 | #include <probes/lttng-events-nowrite.h> | |
6db3d13b | 192 | |
f127e61e MD |
193 | #undef _ctf_integer_ext |
194 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \ | |
c099397a MD |
195 | { \ |
196 | .name = #_item, \ | |
43803cf2 | 197 | .type = __type_integer(_type, 0, 0, -1, _byte_order, _base, none),\ |
f127e61e MD |
198 | .nowrite = _nowrite, \ |
199 | .user = _user, \ | |
c099397a | 200 | }, |
40652b65 | 201 | |
f127e61e MD |
202 | #undef _ctf_array_encoded |
203 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \ | |
299338c8 | 204 | { \ |
c099397a MD |
205 | .name = #_item, \ |
206 | .type = \ | |
207 | { \ | |
299338c8 | 208 | .atype = atype_array, \ |
f127e61e | 209 | .u = \ |
c099397a | 210 | { \ |
f127e61e MD |
211 | .array = \ |
212 | { \ | |
43803cf2 | 213 | .elem_type = __type_integer(_type, 0, 0, 0, __BYTE_ORDER, 10, _encoding), \ |
f127e61e MD |
214 | .length = _length, \ |
215 | } \ | |
216 | } \ | |
299338c8 | 217 | }, \ |
f127e61e MD |
218 | .nowrite = _nowrite, \ |
219 | .user = _user, \ | |
299338c8 | 220 | }, |
40652b65 | 221 | |
43803cf2 MD |
222 | #undef _ctf_array_bitfield |
223 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ | |
224 | { \ | |
225 | .name = #_item, \ | |
226 | .type = \ | |
227 | { \ | |
228 | .atype = atype_array, \ | |
229 | .u = \ | |
230 | { \ | |
231 | .array = \ | |
232 | { \ | |
233 | .elem_type = __type_integer(_type, 1, 1, 0, __LITTLE_ENDIAN, 10, none), \ | |
234 | .length = (_length) * sizeof(_type) * CHAR_BIT, \ | |
235 | .elem_alignment = lttng_alignof(_type), \ | |
236 | } \ | |
237 | } \ | |
238 | }, \ | |
239 | .nowrite = _nowrite, \ | |
240 | .user = _user, \ | |
241 | }, | |
242 | ||
243 | ||
f127e61e MD |
244 | #undef _ctf_sequence_encoded |
245 | #define _ctf_sequence_encoded(_type, _item, _src, \ | |
246 | _length_type, _src_length, _encoding, \ | |
57ede728 | 247 | _byte_order, _base, _user, _nowrite) \ |
299338c8 | 248 | { \ |
c099397a MD |
249 | .name = #_item, \ |
250 | .type = \ | |
251 | { \ | |
299338c8 | 252 | .atype = atype_sequence, \ |
f127e61e | 253 | .u = \ |
c099397a | 254 | { \ |
f127e61e MD |
255 | .sequence = \ |
256 | { \ | |
43803cf2 MD |
257 | .length_type = __type_integer(_length_type, 0, 0, 0, __BYTE_ORDER, 10, none), \ |
258 | .elem_type = __type_integer(_type, 0, 0, -1, _byte_order, _base, _encoding), \ | |
259 | }, \ | |
260 | }, \ | |
261 | }, \ | |
262 | .nowrite = _nowrite, \ | |
263 | .user = _user, \ | |
264 | }, | |
265 | ||
266 | #undef _ctf_sequence_bitfield | |
267 | #define _ctf_sequence_bitfield(_type, _item, _src, \ | |
268 | _length_type, _src_length, \ | |
269 | _user, _nowrite) \ | |
270 | { \ | |
271 | .name = #_item, \ | |
272 | .type = \ | |
273 | { \ | |
274 | .atype = atype_sequence, \ | |
275 | .u = \ | |
276 | { \ | |
277 | .sequence = \ | |
278 | { \ | |
279 | .length_type = __type_integer(_length_type, 0, 0, 0, __BYTE_ORDER, 10, none), \ | |
280 | .elem_type = __type_integer(_type, 1, 1, 0, __LITTLE_ENDIAN, 10, none), \ | |
281 | .elem_alignment = lttng_alignof(_type), \ | |
f127e61e | 282 | }, \ |
c099397a | 283 | }, \ |
299338c8 | 284 | }, \ |
f127e61e MD |
285 | .nowrite = _nowrite, \ |
286 | .user = _user, \ | |
299338c8 | 287 | }, |
40652b65 | 288 | |
f127e61e MD |
289 | #undef _ctf_string |
290 | #define _ctf_string(_item, _src, _user, _nowrite) \ | |
299338c8 | 291 | { \ |
c099397a MD |
292 | .name = #_item, \ |
293 | .type = \ | |
294 | { \ | |
299338c8 | 295 | .atype = atype_string, \ |
f127e61e MD |
296 | .u = \ |
297 | { \ | |
298 | .basic = { .string = { .encoding = lttng_encode_UTF8 } } \ | |
299 | }, \ | |
299338c8 | 300 | }, \ |
f127e61e MD |
301 | .nowrite = _nowrite, \ |
302 | .user = _user, \ | |
299338c8 | 303 | }, |
1d12cebd | 304 | |
f127e61e MD |
305 | #undef TP_FIELDS |
306 | #define TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */ | |
1d12cebd | 307 | |
3bc29f0a | 308 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
265822ae | 309 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
0d1d4002 | 310 | static const struct lttng_event_field __event_fields___##_name[] = { \ |
f127e61e | 311 | _fields \ |
299338c8 MD |
312 | }; |
313 | ||
3bc29f0a | 314 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
265822ae MD |
315 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
316 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, PARAMS(_fields), _code_post) | |
f7bdf4db | 317 | |
299338c8 MD |
318 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
319 | ||
19c57fbf | 320 | /* |
c099397a | 321 | * Stage 3 of the trace events. |
19c57fbf MD |
322 | * |
323 | * Create probe callback prototypes. | |
324 | */ | |
325 | ||
f127e61e | 326 | /* Reset all macros within TRACEPOINT_EVENT */ |
ba012e22 | 327 | #include <probes/lttng-events-reset.h> |
19c57fbf MD |
328 | |
329 | #undef TP_PROTO | |
f127e61e | 330 | #define TP_PROTO(...) __VA_ARGS__ |
19c57fbf | 331 | |
3bc29f0a | 332 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
265822ae | 333 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
19c57fbf MD |
334 | static void __event_probe__##_name(void *__data, _proto); |
335 | ||
3bc29f0a | 336 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
265822ae | 337 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
f7bdf4db MD |
338 | static void __event_probe__##_name(void *__data); |
339 | ||
19c57fbf MD |
340 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
341 | ||
f7bdf4db MD |
342 | /* |
343 | * Stage 4 of the trace events. | |
344 | * | |
40652b65 MD |
345 | * Create static inline function that calculates event size. |
346 | */ | |
347 | ||
f127e61e | 348 | /* Reset all macros within TRACEPOINT_EVENT */ |
ba012e22 MD |
349 | #include <probes/lttng-events-reset.h> |
350 | #include <probes/lttng-events-write.h> | |
6db3d13b | 351 | |
f127e61e MD |
352 | #undef _ctf_integer_ext |
353 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \ | |
a90917c3 | 354 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
0d1d4002 | 355 | __event_len += sizeof(_type); |
6db3d13b | 356 | |
f127e61e MD |
357 | #undef _ctf_array_encoded |
358 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \ | |
a90917c3 | 359 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
0d1d4002 | 360 | __event_len += sizeof(_type) * (_length); |
6db3d13b | 361 | |
43803cf2 MD |
362 | #undef _ctf_array_bitfield |
363 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ | |
364 | _ctf_array_encoded(_type, _item, _src, _length, none, _user, _nowrite) | |
365 | ||
f127e61e MD |
366 | #undef _ctf_sequence_encoded |
367 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
57ede728 | 368 | _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ |
f127e61e MD |
369 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_length_type)); \ |
370 | __event_len += sizeof(_length_type); \ | |
a90917c3 | 371 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
f127e61e | 372 | __dynamic_len[__dynamic_len_idx] = (_src_length); \ |
41b59694 MD |
373 | __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ |
374 | __dynamic_len_idx++; | |
6db3d13b | 375 | |
43803cf2 MD |
376 | #undef _ctf_sequence_bitfield |
377 | #define _ctf_sequence_bitfield(_type, _item, _src, \ | |
378 | _length_type, _src_length, \ | |
379 | _user, _nowrite) \ | |
380 | _ctf_sequence_encoded(_type, _item, _src, _length_type, _src_length, \ | |
381 | none, __LITTLE_ENDIAN, 10, _user, _nowrite) | |
382 | ||
d0255731 | 383 | /* |
f127e61e | 384 | * ctf_user_string includes \0. If returns 0, it faulted, so we set size to |
786b8312 | 385 | * 1 (\0 only). |
d0255731 | 386 | */ |
f127e61e MD |
387 | #undef _ctf_string |
388 | #define _ctf_string(_item, _src, _user, _nowrite) \ | |
389 | if (_user) \ | |
390 | __event_len += __dynamic_len[__dynamic_len_idx++] = \ | |
96d0248a | 391 | max_t(size_t, lttng_strlen_user_inatomic(_src), 1); \ |
f127e61e MD |
392 | else \ |
393 | __event_len += __dynamic_len[__dynamic_len_idx++] = \ | |
96d0248a | 394 | strlen(_src) + 1; |
c6e3f225 | 395 | |
0d1d4002 | 396 | #undef TP_PROTO |
f127e61e | 397 | #define TP_PROTO(...) __VA_ARGS__ |
6db3d13b | 398 | |
f127e61e MD |
399 | #undef TP_FIELDS |
400 | #define TP_FIELDS(...) __VA_ARGS__ | |
6db3d13b | 401 | |
7ca580f8 MD |
402 | #undef TP_locvar |
403 | #define TP_locvar(...) __VA_ARGS__ | |
404 | ||
3bc29f0a | 405 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
265822ae | 406 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
7ca580f8 MD |
407 | static inline size_t __event_get_size__##_name(size_t *__dynamic_len, \ |
408 | void *__tp_locvar, _proto) \ | |
0d1d4002 MD |
409 | { \ |
410 | size_t __event_len = 0; \ | |
d3de7f14 | 411 | unsigned int __dynamic_len_idx __attribute__((unused)) = 0; \ |
7ca580f8 | 412 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
d3de7f14 | 413 | \ |
f127e61e | 414 | _fields \ |
d3de7f14 MD |
415 | return __event_len; \ |
416 | } | |
417 | ||
3bc29f0a | 418 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
265822ae | 419 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
7ca580f8 MD |
420 | static inline size_t __event_get_size__##_name(size_t *__dynamic_len, \ |
421 | void *__tp_locvar) \ | |
d3de7f14 MD |
422 | { \ |
423 | size_t __event_len = 0; \ | |
424 | unsigned int __dynamic_len_idx __attribute__((unused)) = 0; \ | |
7ca580f8 | 425 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
0d1d4002 | 426 | \ |
f127e61e | 427 | _fields \ |
0d1d4002 | 428 | return __event_len; \ |
6db3d13b | 429 | } |
40652b65 MD |
430 | |
431 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
432 | ||
f127e61e | 433 | |
40652b65 | 434 | /* |
f127e61e | 435 | * Stage 4.1 of tracepoint event generation. |
e763dbf5 | 436 | * |
f127e61e MD |
437 | * Create static inline function that layout the filter stack data. |
438 | * We make both write and nowrite data available to the filter. | |
e763dbf5 MD |
439 | */ |
440 | ||
f127e61e | 441 | /* Reset all macros within TRACEPOINT_EVENT */ |
ba012e22 MD |
442 | #include <probes/lttng-events-reset.h> |
443 | #include <probes/lttng-events-write.h> | |
444 | #include <probes/lttng-events-nowrite.h> | |
f127e61e MD |
445 | |
446 | #undef _ctf_integer_ext_fetched | |
447 | #define _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) \ | |
448 | if (lttng_is_signed_type(_type)) { \ | |
449 | int64_t __ctf_tmp_int64; \ | |
450 | switch (sizeof(_type)) { \ | |
451 | case 1: \ | |
452 | { \ | |
453 | union { _type t; int8_t v; } __tmp = { (_type) (_src) }; \ | |
454 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ | |
455 | break; \ | |
456 | } \ | |
457 | case 2: \ | |
458 | { \ | |
459 | union { _type t; int16_t v; } __tmp = { (_type) (_src) }; \ | |
460 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ | |
461 | break; \ | |
462 | } \ | |
463 | case 4: \ | |
464 | { \ | |
465 | union { _type t; int32_t v; } __tmp = { (_type) (_src) }; \ | |
466 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ | |
467 | break; \ | |
468 | } \ | |
469 | case 8: \ | |
470 | { \ | |
471 | union { _type t; int64_t v; } __tmp = { (_type) (_src) }; \ | |
472 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ | |
473 | break; \ | |
474 | } \ | |
475 | default: \ | |
476 | BUG_ON(1); \ | |
477 | }; \ | |
478 | memcpy(__stack_data, &__ctf_tmp_int64, sizeof(int64_t)); \ | |
479 | } else { \ | |
480 | uint64_t __ctf_tmp_uint64; \ | |
481 | switch (sizeof(_type)) { \ | |
482 | case 1: \ | |
483 | { \ | |
484 | union { _type t; uint8_t v; } __tmp = { (_type) (_src) }; \ | |
485 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ | |
486 | break; \ | |
487 | } \ | |
488 | case 2: \ | |
489 | { \ | |
490 | union { _type t; uint16_t v; } __tmp = { (_type) (_src) }; \ | |
491 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ | |
492 | break; \ | |
493 | } \ | |
494 | case 4: \ | |
495 | { \ | |
496 | union { _type t; uint32_t v; } __tmp = { (_type) (_src) }; \ | |
497 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ | |
498 | break; \ | |
499 | } \ | |
500 | case 8: \ | |
501 | { \ | |
502 | union { _type t; uint64_t v; } __tmp = { (_type) (_src) }; \ | |
503 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ | |
504 | break; \ | |
505 | } \ | |
506 | default: \ | |
507 | BUG_ON(1); \ | |
508 | }; \ | |
509 | memcpy(__stack_data, &__ctf_tmp_uint64, sizeof(uint64_t)); \ | |
510 | } \ | |
511 | __stack_data += sizeof(int64_t); | |
512 | ||
513 | #undef _ctf_integer_ext_isuser0 | |
514 | #define _ctf_integer_ext_isuser0(_type, _item, _src, _byte_order, _base, _nowrite) \ | |
515 | _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) | |
516 | ||
517 | #undef _ctf_integer_ext_isuser1 | |
518 | #define _ctf_integer_ext_isuser1(_type, _item, _user_src, _byte_order, _base, _nowrite) \ | |
85522867 MD |
519 | { \ |
520 | union { \ | |
521 | char __array[sizeof(_user_src)]; \ | |
522 | __typeof__(_user_src) __v; \ | |
523 | } __tmp_fetch; \ | |
524 | if (lib_ring_buffer_copy_from_user_check_nofault(__tmp_fetch.__array, \ | |
525 | &(_user_src), sizeof(_user_src))) \ | |
526 | memset(__tmp_fetch.__array, 0, sizeof(__tmp_fetch.__array)); \ | |
527 | _ctf_integer_ext_fetched(_type, _item, __tmp_fetch.__v, _byte_order, _base, _nowrite) \ | |
f127e61e | 528 | } |
e763dbf5 | 529 | |
f127e61e MD |
530 | #undef _ctf_integer_ext |
531 | #define _ctf_integer_ext(_type, _item, _user_src, _byte_order, _base, _user, _nowrite) \ | |
532 | _ctf_integer_ext_isuser##_user(_type, _item, _user_src, _byte_order, _base, _nowrite) | |
533 | ||
534 | #undef _ctf_array_encoded | |
535 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \ | |
536 | { \ | |
537 | unsigned long __ctf_tmp_ulong = (unsigned long) (_length); \ | |
538 | const void *__ctf_tmp_ptr = (_src); \ | |
539 | memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \ | |
540 | __stack_data += sizeof(unsigned long); \ | |
6b272cda MD |
541 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \ |
542 | __stack_data += sizeof(void *); \ | |
f127e61e MD |
543 | } |
544 | ||
43803cf2 MD |
545 | #undef _ctf_array_bitfield |
546 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ | |
547 | _ctf_array_encoded(_type, _item, _src, _length, none, _user, _nowrite) | |
548 | ||
f127e61e MD |
549 | #undef _ctf_sequence_encoded |
550 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
57ede728 | 551 | _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ |
f127e61e MD |
552 | { \ |
553 | unsigned long __ctf_tmp_ulong = (unsigned long) (_src_length); \ | |
554 | const void *__ctf_tmp_ptr = (_src); \ | |
555 | memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \ | |
556 | __stack_data += sizeof(unsigned long); \ | |
6b272cda MD |
557 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \ |
558 | __stack_data += sizeof(void *); \ | |
f127e61e MD |
559 | } |
560 | ||
43803cf2 MD |
561 | #undef _ctf_sequence_bitfield |
562 | #define _ctf_sequence_bitfield(_type, _item, _src, \ | |
563 | _length_type, _src_length, \ | |
564 | _user, _nowrite) \ | |
565 | _ctf_sequence_encoded(_type, _item, _src, _length_type, _src_length, \ | |
566 | none, __LITTLE_ENDIAN, 10, _user, _nowrite) | |
567 | ||
f127e61e MD |
568 | #undef _ctf_string |
569 | #define _ctf_string(_item, _src, _user, _nowrite) \ | |
570 | { \ | |
571 | const void *__ctf_tmp_ptr = (_src); \ | |
6b272cda MD |
572 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \ |
573 | __stack_data += sizeof(void *); \ | |
f127e61e | 574 | } |
c6e3f225 | 575 | |
e763dbf5 | 576 | #undef TP_PROTO |
f127e61e | 577 | #define TP_PROTO(...) __VA_ARGS__ |
e763dbf5 | 578 | |
f127e61e MD |
579 | #undef TP_FIELDS |
580 | #define TP_FIELDS(...) __VA_ARGS__ | |
e763dbf5 | 581 | |
7ca580f8 MD |
582 | #undef TP_locvar |
583 | #define TP_locvar(...) __VA_ARGS__ | |
584 | ||
f127e61e | 585 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
265822ae | 586 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
f127e61e MD |
587 | static inline \ |
588 | void __event_prepare_filter_stack__##_name(char *__stack_data, \ | |
589 | void *__tp_locvar) \ | |
e763dbf5 | 590 | { \ |
7ca580f8 MD |
591 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
592 | \ | |
f127e61e | 593 | _fields \ |
e763dbf5 MD |
594 | } |
595 | ||
f127e61e | 596 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
265822ae | 597 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
f127e61e MD |
598 | static inline \ |
599 | void __event_prepare_filter_stack__##_name(char *__stack_data, \ | |
600 | void *__tp_locvar, _proto) \ | |
d3de7f14 | 601 | { \ |
7ca580f8 MD |
602 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
603 | \ | |
f127e61e | 604 | _fields \ |
d3de7f14 MD |
605 | } |
606 | ||
e763dbf5 MD |
607 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
608 | ||
e763dbf5 | 609 | /* |
f127e61e | 610 | * Stage 5 of the trace events. |
40652b65 | 611 | * |
f127e61e | 612 | * Create static inline function that calculates event payload alignment. |
3c4ffab9 MD |
613 | */ |
614 | ||
f127e61e | 615 | /* Reset all macros within TRACEPOINT_EVENT */ |
ba012e22 MD |
616 | #include <probes/lttng-events-reset.h> |
617 | #include <probes/lttng-events-write.h> | |
3c4ffab9 | 618 | |
f127e61e MD |
619 | #undef _ctf_integer_ext |
620 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \ | |
621 | __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); | |
3c4ffab9 | 622 | |
f127e61e MD |
623 | #undef _ctf_array_encoded |
624 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \ | |
625 | __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); | |
3c4ffab9 | 626 | |
43803cf2 MD |
627 | #undef _ctf_array_bitfield |
628 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ | |
629 | _ctf_array_encoded(_type, _item, _src, _length, none, _user, _nowrite) | |
630 | ||
f127e61e MD |
631 | #undef _ctf_sequence_encoded |
632 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
57ede728 | 633 | _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ |
f127e61e MD |
634 | __event_align = max_t(size_t, __event_align, lttng_alignof(_length_type)); \ |
635 | __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); | |
64c796d8 | 636 | |
43803cf2 MD |
637 | #undef _ctf_sequence_bitfield |
638 | #define _ctf_sequence_bitfield(_type, _item, _src, \ | |
639 | _length_type, _src_length, \ | |
640 | _user, _nowrite) \ | |
641 | _ctf_sequence_encoded(_type, _item, _src, _length_type, _src_length, \ | |
642 | none, __LITTLE_ENDIAN, 10, _user, _nowrite) | |
643 | ||
f127e61e MD |
644 | #undef _ctf_string |
645 | #define _ctf_string(_item, _src, _user, _nowrite) | |
64c796d8 | 646 | |
f127e61e MD |
647 | #undef TP_PROTO |
648 | #define TP_PROTO(...) __VA_ARGS__ | |
84da5206 | 649 | |
f127e61e MD |
650 | #undef TP_FIELDS |
651 | #define TP_FIELDS(...) __VA_ARGS__ | |
c6e3f225 | 652 | |
f127e61e MD |
653 | #undef TP_locvar |
654 | #define TP_locvar(...) __VA_ARGS__ | |
3c4ffab9 | 655 | |
f127e61e | 656 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
265822ae | 657 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
f127e61e MD |
658 | static inline size_t __event_get_align__##_name(void *__tp_locvar, _proto) \ |
659 | { \ | |
660 | size_t __event_align = 1; \ | |
661 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ | |
662 | \ | |
663 | _fields \ | |
664 | return __event_align; \ | |
665 | } | |
3c4ffab9 | 666 | |
3bc29f0a | 667 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
265822ae | 668 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
f127e61e MD |
669 | static inline size_t __event_get_align__##_name(void *__tp_locvar) \ |
670 | { \ | |
671 | size_t __event_align = 1; \ | |
672 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ | |
673 | \ | |
674 | _fields \ | |
675 | return __event_align; \ | |
676 | } | |
d3de7f14 | 677 | |
3c4ffab9 MD |
678 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
679 | ||
3c4ffab9 | 680 | /* |
f127e61e | 681 | * Stage 6 of tracepoint event generation. |
e763dbf5 | 682 | * |
f127e61e MD |
683 | * Create the probe function. This function calls event size calculation |
684 | * and writes event data into the buffer. | |
40652b65 MD |
685 | */ |
686 | ||
f127e61e | 687 | /* Reset all macros within TRACEPOINT_EVENT */ |
ba012e22 MD |
688 | #include <probes/lttng-events-reset.h> |
689 | #include <probes/lttng-events-write.h> | |
c6e3f225 | 690 | |
f127e61e MD |
691 | #undef _ctf_integer_ext_fetched |
692 | #define _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) \ | |
e763dbf5 | 693 | { \ |
f127e61e MD |
694 | _type __tmp = _src; \ |
695 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ | |
aaa4004a | 696 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ |
f127e61e MD |
697 | } |
698 | ||
699 | #undef _ctf_integer_ext_isuser0 | |
700 | #define _ctf_integer_ext_isuser0(_type, _item, _src, _byte_order, _base, _nowrite) \ | |
701 | _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) | |
702 | ||
703 | #undef _ctf_integer_ext_isuser1 | |
704 | #define _ctf_integer_ext_isuser1(_type, _item, _user_src, _byte_order, _base, _nowrite) \ | |
705 | { \ | |
85522867 MD |
706 | union { \ |
707 | char __array[sizeof(_user_src)]; \ | |
708 | __typeof__(_user_src) __v; \ | |
709 | } __tmp_fetch; \ | |
710 | if (lib_ring_buffer_copy_from_user_check_nofault(__tmp_fetch.__array, \ | |
711 | &(_user_src), sizeof(_user_src))) \ | |
712 | memset(__tmp_fetch.__array, 0, sizeof(__tmp_fetch.__array)); \ | |
713 | _ctf_integer_ext_fetched(_type, _item, __tmp_fetch.__v, _byte_order, _base, _nowrite) \ | |
f127e61e MD |
714 | } |
715 | ||
716 | #undef _ctf_integer_ext | |
717 | #define _ctf_integer_ext(_type, _item, _user_src, _byte_order, _base, _user, _nowrite) \ | |
718 | _ctf_integer_ext_isuser##_user(_type, _item, _user_src, _byte_order, _base, _nowrite) | |
719 | ||
720 | #undef _ctf_array_encoded | |
721 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \ | |
722 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
723 | if (_user) { \ | |
724 | __chan->ops->event_write_from_user(&__ctx, _src, sizeof(_type) * (_length)); \ | |
725 | } else { \ | |
726 | __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); \ | |
727 | } | |
728 | ||
43803cf2 MD |
729 | #if (__BYTE_ORDER == __LITTLE_ENDIAN) |
730 | #undef _ctf_array_bitfield | |
731 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ | |
732 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
733 | if (_user) { \ | |
734 | __chan->ops->event_write_from_user(&__ctx, _src, sizeof(_type) * (_length)); \ | |
735 | } else { \ | |
736 | __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); \ | |
737 | } | |
738 | #else /* #if (__BYTE_ORDER == __LITTLE_ENDIAN) */ | |
739 | /* | |
740 | * For big endian, we need to byteswap into little endian. | |
741 | */ | |
742 | #undef _ctf_array_bitfield | |
743 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ | |
744 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
745 | { \ | |
746 | size_t _i; \ | |
747 | \ | |
748 | for (_i = 0; _i < (_length); _i++) { \ | |
749 | _type _tmp; \ | |
750 | \ | |
751 | if (_user) { \ | |
752 | if (get_user(_tmp, (_type *) _src + _i)) \ | |
753 | _tmp = 0; \ | |
754 | } else { \ | |
755 | _tmp = ((_type *) _src)[_i]; \ | |
756 | } \ | |
757 | switch (sizeof(_type)) { \ | |
758 | case 1: \ | |
759 | break; \ | |
760 | case 2: \ | |
761 | _tmp = cpu_to_le16(_tmp); \ | |
762 | break; \ | |
763 | case 4: \ | |
764 | _tmp = cpu_to_le32(_tmp); \ | |
765 | break; \ | |
766 | case 8: \ | |
767 | _tmp = cpu_to_le64(_tmp); \ | |
768 | break; \ | |
769 | default: \ | |
770 | BUG_ON(1); \ | |
771 | } \ | |
772 | __chan->ops->event_write(&__ctx, &_tmp, sizeof(_type)); \ | |
773 | } \ | |
774 | } | |
775 | #endif /* #else #if (__BYTE_ORDER == __LITTLE_ENDIAN) */ | |
776 | ||
f127e61e MD |
777 | #undef _ctf_sequence_encoded |
778 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
57ede728 | 779 | _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ |
84da5206 | 780 | { \ |
f127e61e MD |
781 | _length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx]; \ |
782 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ | |
783 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ | |
84da5206 | 784 | } \ |
f127e61e MD |
785 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ |
786 | if (_user) { \ | |
787 | __chan->ops->event_write_from_user(&__ctx, _src, \ | |
788 | sizeof(_type) * __get_dynamic_len(dest)); \ | |
789 | } else { \ | |
790 | __chan->ops->event_write(&__ctx, _src, \ | |
791 | sizeof(_type) * __get_dynamic_len(dest)); \ | |
792 | } | |
793 | ||
43803cf2 MD |
794 | #if (__BYTE_ORDER == __LITTLE_ENDIAN) |
795 | #undef _ctf_sequence_bitfield | |
796 | #define _ctf_sequence_bitfield(_type, _item, _src, \ | |
797 | _length_type, _src_length, \ | |
798 | _user, _nowrite) \ | |
799 | { \ | |
800 | _length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx] * sizeof(_type) * CHAR_BIT; \ | |
801 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ | |
802 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ | |
803 | } \ | |
804 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
805 | if (_user) { \ | |
806 | __chan->ops->event_write_from_user(&__ctx, _src, \ | |
807 | sizeof(_type) * __get_dynamic_len(dest)); \ | |
808 | } else { \ | |
809 | __chan->ops->event_write(&__ctx, _src, \ | |
810 | sizeof(_type) * __get_dynamic_len(dest)); \ | |
811 | } | |
812 | #else /* #if (__BYTE_ORDER == __LITTLE_ENDIAN) */ | |
813 | /* | |
814 | * For big endian, we need to byteswap into little endian. | |
815 | */ | |
816 | #undef _ctf_sequence_bitfield | |
817 | #define _ctf_sequence_bitfield(_type, _item, _src, \ | |
818 | _length_type, _src_length, \ | |
819 | _user, _nowrite) \ | |
820 | { \ | |
821 | _length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx] * sizeof(_type) * CHAR_BIT; \ | |
822 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ | |
823 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ | |
824 | } \ | |
825 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
826 | { \ | |
827 | size_t _i, _length; \ | |
828 | \ | |
829 | _length = __get_dynamic_len(dest); \ | |
830 | for (_i = 0; _i < _length; _i++) { \ | |
831 | _type _tmp; \ | |
832 | \ | |
833 | if (_user) { \ | |
834 | if (get_user(_tmp, (_type *) _src + _i)) \ | |
835 | _tmp = 0; \ | |
836 | } else { \ | |
837 | _tmp = ((_type *) _src)[_i]; \ | |
838 | } \ | |
839 | switch (sizeof(_type)) { \ | |
840 | case 1: \ | |
841 | break; \ | |
842 | case 2: \ | |
843 | _tmp = cpu_to_le16(_tmp); \ | |
844 | break; \ | |
845 | case 4: \ | |
846 | _tmp = cpu_to_le32(_tmp); \ | |
847 | break; \ | |
848 | case 8: \ | |
849 | _tmp = cpu_to_le64(_tmp); \ | |
850 | break; \ | |
851 | default: \ | |
852 | BUG_ON(1); \ | |
853 | } \ | |
854 | __chan->ops->event_write(&__ctx, &_tmp, sizeof(_type)); \ | |
855 | } \ | |
856 | } | |
857 | #endif /* #else #if (__BYTE_ORDER == __LITTLE_ENDIAN) */ | |
858 | ||
f127e61e MD |
859 | #undef _ctf_string |
860 | #define _ctf_string(_item, _src, _user, _nowrite) \ | |
861 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src))); \ | |
862 | if (_user) { \ | |
863 | __chan->ops->event_strcpy_from_user(&__ctx, _src, \ | |
864 | __get_dynamic_len(dest)); \ | |
865 | } else { \ | |
866 | __chan->ops->event_strcpy(&__ctx, _src, \ | |
867 | __get_dynamic_len(dest)); \ | |
868 | } | |
e763dbf5 MD |
869 | |
870 | /* Beware: this get len actually consumes the len value */ | |
f127e61e MD |
871 | #undef __get_dynamic_len |
872 | #define __get_dynamic_len(field) __stackvar.__dynamic_len[__dynamic_len_idx++] | |
e763dbf5 MD |
873 | |
874 | #undef TP_PROTO | |
f127e61e | 875 | #define TP_PROTO(...) __VA_ARGS__ |
e763dbf5 MD |
876 | |
877 | #undef TP_ARGS | |
f127e61e | 878 | #define TP_ARGS(...) __VA_ARGS__ |
e763dbf5 | 879 | |
f127e61e MD |
880 | #undef TP_FIELDS |
881 | #define TP_FIELDS(...) __VA_ARGS__ | |
e763dbf5 | 882 | |
7ca580f8 MD |
883 | #undef TP_locvar |
884 | #define TP_locvar(...) __VA_ARGS__ | |
885 | ||
265822ae MD |
886 | #undef TP_code_pre |
887 | #define TP_code_pre(...) __VA_ARGS__ | |
888 | ||
889 | #undef TP_code_post | |
890 | #define TP_code_post(...) __VA_ARGS__ | |
7ca580f8 | 891 | |
c337ddc2 MD |
892 | /* |
893 | * For state dump, check that "session" argument (mandatory) matches the | |
894 | * session this event belongs to. Ensures that we write state dump data only | |
895 | * into the started session, not into all sessions. | |
896 | */ | |
897 | #ifdef TP_SESSION_CHECK | |
898 | #define _TP_SESSION_CHECK(session, csession) (session == csession) | |
899 | #else /* TP_SESSION_CHECK */ | |
900 | #define _TP_SESSION_CHECK(session, csession) 1 | |
901 | #endif /* TP_SESSION_CHECK */ | |
902 | ||
f9771d39 | 903 | /* |
f127e61e MD |
904 | * Using twice size for filter stack data to hold size and pointer for |
905 | * each field (worse case). For integers, max size required is 64-bit. | |
906 | * Same for double-precision floats. Those fit within | |
907 | * 2*sizeof(unsigned long) for all supported architectures. | |
908 | * Perform UNION (||) of filter runtime list. | |
f9771d39 | 909 | */ |
3bc29f0a | 910 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
265822ae | 911 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
e763dbf5 MD |
912 | static void __event_probe__##_name(void *__data, _proto) \ |
913 | { \ | |
7ca580f8 | 914 | struct probe_local_vars { _locvar }; \ |
a90917c3 | 915 | struct lttng_event *__event = __data; \ |
79150a49 JD |
916 | struct lttng_probe_ctx __lttng_probe_ctx = { \ |
917 | .event = __event, \ | |
ccecf3fb | 918 | .interruptible = !irqs_disabled(), \ |
79150a49 | 919 | }; \ |
a90917c3 | 920 | struct lttng_channel *__chan = __event->chan; \ |
e0130fab | 921 | struct lttng_session *__session = __chan->session; \ |
aaa4004a | 922 | struct lib_ring_buffer_ctx __ctx; \ |
e763dbf5 | 923 | size_t __event_len, __event_align; \ |
d3de7f14 | 924 | size_t __dynamic_len_idx __attribute__((unused)) = 0; \ |
f127e61e MD |
925 | union { \ |
926 | size_t __dynamic_len[ARRAY_SIZE(__event_fields___##_name)]; \ | |
927 | char __filter_stack_data[2 * sizeof(unsigned long) * ARRAY_SIZE(__event_fields___##_name)]; \ | |
928 | } __stackvar; \ | |
e763dbf5 | 929 | int __ret; \ |
7ca580f8 MD |
930 | struct probe_local_vars __tp_locvar; \ |
931 | struct probe_local_vars *tp_locvar __attribute__((unused)) = \ | |
932 | &__tp_locvar; \ | |
e0130fab | 933 | struct lttng_pid_tracker *__lpf; \ |
e763dbf5 | 934 | \ |
e0130fab | 935 | if (!_TP_SESSION_CHECK(session, __session)) \ |
c337ddc2 | 936 | return; \ |
e0130fab | 937 | if (unlikely(!ACCESS_ONCE(__session->active))) \ |
e64957da MD |
938 | return; \ |
939 | if (unlikely(!ACCESS_ONCE(__chan->enabled))) \ | |
940 | return; \ | |
941 | if (unlikely(!ACCESS_ONCE(__event->enabled))) \ | |
52fc2e1f | 942 | return; \ |
7a09dcb7 | 943 | __lpf = lttng_rcu_dereference(__session->pid_tracker); \ |
e0130fab MD |
944 | if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid))) \ |
945 | return; \ | |
265822ae | 946 | _code_pre \ |
f127e61e MD |
947 | if (unlikely(!list_empty(&__event->bytecode_runtime_head))) { \ |
948 | struct lttng_bytecode_runtime *bc_runtime; \ | |
949 | int __filter_record = __event->has_enablers_without_bytecode; \ | |
950 | \ | |
951 | __event_prepare_filter_stack__##_name(__stackvar.__filter_stack_data, \ | |
952 | tp_locvar, _args); \ | |
7a09dcb7 | 953 | lttng_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \ |
79150a49 | 954 | if (unlikely(bc_runtime->filter(bc_runtime, &__lttng_probe_ctx, \ |
f127e61e MD |
955 | __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \ |
956 | __filter_record = 1; \ | |
957 | } \ | |
958 | if (likely(!__filter_record)) \ | |
265822ae | 959 | goto __post; \ |
f127e61e MD |
960 | } \ |
961 | __event_len = __event_get_size__##_name(__stackvar.__dynamic_len, \ | |
962 | tp_locvar, _args); \ | |
7ca580f8 | 963 | __event_align = __event_get_align__##_name(tp_locvar, _args); \ |
79150a49 | 964 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, &__lttng_probe_ctx, __event_len, \ |
e763dbf5 | 965 | __event_align, -1); \ |
aaa4004a | 966 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ |
e763dbf5 | 967 | if (__ret < 0) \ |
265822ae | 968 | goto __post; \ |
f127e61e | 969 | _fields \ |
aaa4004a | 970 | __chan->ops->event_commit(&__ctx); \ |
265822ae MD |
971 | __post: \ |
972 | _code_post \ | |
973 | return; \ | |
e763dbf5 MD |
974 | } |
975 | ||
3bc29f0a | 976 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
265822ae | 977 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
f7bdf4db MD |
978 | static void __event_probe__##_name(void *__data) \ |
979 | { \ | |
7ca580f8 | 980 | struct probe_local_vars { _locvar }; \ |
a90917c3 | 981 | struct lttng_event *__event = __data; \ |
79150a49 JD |
982 | struct lttng_probe_ctx __lttng_probe_ctx = { \ |
983 | .event = __event, \ | |
ccecf3fb | 984 | .interruptible = !irqs_disabled(), \ |
79150a49 | 985 | }; \ |
a90917c3 | 986 | struct lttng_channel *__chan = __event->chan; \ |
e0130fab | 987 | struct lttng_session *__session = __chan->session; \ |
f7bdf4db MD |
988 | struct lib_ring_buffer_ctx __ctx; \ |
989 | size_t __event_len, __event_align; \ | |
d3de7f14 | 990 | size_t __dynamic_len_idx __attribute__((unused)) = 0; \ |
f127e61e MD |
991 | union { \ |
992 | size_t __dynamic_len[ARRAY_SIZE(__event_fields___##_name)]; \ | |
993 | char __filter_stack_data[2 * sizeof(unsigned long) * ARRAY_SIZE(__event_fields___##_name)]; \ | |
994 | } __stackvar; \ | |
f7bdf4db | 995 | int __ret; \ |
7ca580f8 MD |
996 | struct probe_local_vars __tp_locvar; \ |
997 | struct probe_local_vars *tp_locvar __attribute__((unused)) = \ | |
998 | &__tp_locvar; \ | |
e0130fab | 999 | struct lttng_pid_tracker *__lpf; \ |
f7bdf4db | 1000 | \ |
e0130fab | 1001 | if (!_TP_SESSION_CHECK(session, __session)) \ |
c337ddc2 | 1002 | return; \ |
e0130fab | 1003 | if (unlikely(!ACCESS_ONCE(__session->active))) \ |
f7bdf4db MD |
1004 | return; \ |
1005 | if (unlikely(!ACCESS_ONCE(__chan->enabled))) \ | |
1006 | return; \ | |
1007 | if (unlikely(!ACCESS_ONCE(__event->enabled))) \ | |
1008 | return; \ | |
7a09dcb7 | 1009 | __lpf = lttng_rcu_dereference(__session->pid_tracker); \ |
e0130fab MD |
1010 | if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid))) \ |
1011 | return; \ | |
265822ae | 1012 | _code_pre \ |
f127e61e MD |
1013 | if (unlikely(!list_empty(&__event->bytecode_runtime_head))) { \ |
1014 | struct lttng_bytecode_runtime *bc_runtime; \ | |
1015 | int __filter_record = __event->has_enablers_without_bytecode; \ | |
1016 | \ | |
1017 | __event_prepare_filter_stack__##_name(__stackvar.__filter_stack_data, \ | |
1018 | tp_locvar); \ | |
7a09dcb7 | 1019 | lttng_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \ |
79150a49 | 1020 | if (unlikely(bc_runtime->filter(bc_runtime, &__lttng_probe_ctx, \ |
f127e61e MD |
1021 | __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \ |
1022 | __filter_record = 1; \ | |
1023 | } \ | |
1024 | if (likely(!__filter_record)) \ | |
265822ae | 1025 | goto __post; \ |
f127e61e MD |
1026 | } \ |
1027 | __event_len = __event_get_size__##_name(__stackvar.__dynamic_len, tp_locvar); \ | |
7ca580f8 | 1028 | __event_align = __event_get_align__##_name(tp_locvar); \ |
79150a49 | 1029 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, &__lttng_probe_ctx, __event_len, \ |
f7bdf4db MD |
1030 | __event_align, -1); \ |
1031 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ | |
1032 | if (__ret < 0) \ | |
265822ae | 1033 | goto __post; \ |
f127e61e | 1034 | _fields \ |
f7bdf4db | 1035 | __chan->ops->event_commit(&__ctx); \ |
265822ae MD |
1036 | __post: \ |
1037 | _code_post \ | |
1038 | return; \ | |
f7bdf4db MD |
1039 | } |
1040 | ||
e763dbf5 MD |
1041 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
1042 | ||
f127e61e MD |
1043 | #undef __get_dynamic_len |
1044 | ||
1045 | /* | |
1046 | * Stage 7 of the trace events. | |
1047 | * | |
1048 | * Create event descriptions. | |
1049 | */ | |
1050 | ||
1051 | /* Named field types must be defined in lttng-types.h */ | |
1052 | ||
ba012e22 | 1053 | #include <probes/lttng-events-reset.h> /* Reset all macros within LTTNG_TRACEPOINT_EVENT */ |
f127e61e MD |
1054 | |
1055 | #ifndef TP_PROBE_CB | |
1056 | #define TP_PROBE_CB(_template) &__event_probe__##_template | |
1057 | #endif | |
1058 | ||
1059 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS | |
1060 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ | |
1061 | static const struct lttng_event_desc __event_desc___##_map = { \ | |
1062 | .fields = __event_fields___##_template, \ | |
1063 | .name = #_map, \ | |
1064 | .kname = #_name, \ | |
1065 | .probe_callback = (void *) TP_PROBE_CB(_template), \ | |
1066 | .nr_fields = ARRAY_SIZE(__event_fields___##_template), \ | |
1067 | .owner = THIS_MODULE, \ | |
1068 | }; | |
1069 | ||
1070 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP | |
1071 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ | |
1072 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) | |
1073 | ||
1074 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
1075 | ||
1076 | /* | |
1077 | * Stage 8 of the trace events. | |
1078 | * | |
1079 | * Create an array of event description pointers. | |
1080 | */ | |
1081 | ||
ba012e22 | 1082 | #include <probes/lttng-events-reset.h> /* Reset all macros within LTTNG_TRACEPOINT_EVENT */ |
f127e61e MD |
1083 | |
1084 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS | |
1085 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ | |
1086 | &__event_desc___##_map, | |
1087 | ||
1088 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP | |
1089 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ | |
1090 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) | |
1091 | ||
1092 | #define TP_ID1(_token, _system) _token##_system | |
1093 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
1094 | ||
1095 | static const struct lttng_event_desc *TP_ID(__event_desc___, TRACE_SYSTEM)[] = { | |
1096 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
1097 | }; | |
1098 | ||
1099 | #undef TP_ID1 | |
1100 | #undef TP_ID | |
1101 | ||
1102 | /* | |
1103 | * Stage 9 of the trace events. | |
1104 | * | |
1105 | * Create a toplevel descriptor for the whole probe. | |
1106 | */ | |
1107 | ||
1108 | #define TP_ID1(_token, _system) _token##_system | |
1109 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
1110 | ||
1111 | /* non-const because list head will be modified when registered. */ | |
1112 | static __used struct lttng_probe_desc TP_ID(__probe_desc___, TRACE_SYSTEM) = { | |
1113 | .provider = __stringify(TRACE_SYSTEM), | |
1114 | .event_desc = TP_ID(__event_desc___, TRACE_SYSTEM), | |
1115 | .nr_events = ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)), | |
1116 | .head = { NULL, NULL }, | |
1117 | .lazy_init_head = { NULL, NULL }, | |
1118 | .lazy = 0, | |
1119 | }; | |
1120 | ||
1121 | #undef TP_ID1 | |
1122 | #undef TP_ID | |
1123 | ||
3afe7aac | 1124 | /* |
c099397a | 1125 | * Stage 10 of the trace events. |
3afe7aac MD |
1126 | * |
1127 | * Register/unregister probes at module load/unload. | |
1128 | */ | |
1129 | ||
ba012e22 | 1130 | #include <probes/lttng-events-reset.h> /* Reset all macros within LTTNG_TRACEPOINT_EVENT */ |
3afe7aac MD |
1131 | |
1132 | #define TP_ID1(_token, _system) _token##_system | |
1133 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
1134 | #define module_init_eval1(_token, _system) module_init(_token##_system) | |
1135 | #define module_init_eval(_token, _system) module_init_eval1(_token, _system) | |
1136 | #define module_exit_eval1(_token, _system) module_exit(_token##_system) | |
1137 | #define module_exit_eval(_token, _system) module_exit_eval1(_token, _system) | |
1138 | ||
2655f9ad | 1139 | #ifndef TP_MODULE_NOINIT |
3afe7aac MD |
1140 | static int TP_ID(__lttng_events_init__, TRACE_SYSTEM)(void) |
1141 | { | |
6d2a620c | 1142 | wrapper_vmalloc_sync_all(); |
a90917c3 | 1143 | return lttng_probe_register(&TP_ID(__probe_desc___, TRACE_SYSTEM)); |
3afe7aac MD |
1144 | } |
1145 | ||
3afe7aac MD |
1146 | static void TP_ID(__lttng_events_exit__, TRACE_SYSTEM)(void) |
1147 | { | |
a90917c3 | 1148 | lttng_probe_unregister(&TP_ID(__probe_desc___, TRACE_SYSTEM)); |
3afe7aac MD |
1149 | } |
1150 | ||
2655f9ad MD |
1151 | #ifndef TP_MODULE_NOAUTOLOAD |
1152 | module_init_eval(__lttng_events_init__, TRACE_SYSTEM); | |
3afe7aac | 1153 | module_exit_eval(__lttng_events_exit__, TRACE_SYSTEM); |
259b6cb3 | 1154 | #endif |
3afe7aac | 1155 | |
2655f9ad MD |
1156 | #endif |
1157 | ||
3afe7aac MD |
1158 | #undef module_init_eval |
1159 | #undef module_exit_eval | |
1160 | #undef TP_ID1 | |
1161 | #undef TP_ID | |
177b3692 MD |
1162 | |
1163 | #undef TP_PROTO | |
1164 | #undef TP_ARGS |