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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> |
814f7d25 | 26 | #include <linux/swab.h> |
8d43abb7 MD |
27 | |
28 | #include <probes/lttng.h> | |
29 | #include <probes/lttng-types.h> | |
30 | #include <probes/lttng-probe-user.h> | |
31 | #include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_all() */ | |
32 | #include <wrapper/ringbuffer/frontend_types.h> | |
85522867 | 33 | #include <wrapper/ringbuffer/backend.h> |
8d43abb7 MD |
34 | #include <wrapper/rcu.h> |
35 | #include <lttng-events.h> | |
36 | #include <lttng-tracer-core.h> | |
40652b65 | 37 | |
98e38a60 MD |
38 | #define __LTTNG_NULL_STRING "(null)" |
39 | ||
40652b65 | 40 | /* |
6db3d13b | 41 | * Macro declarations used for all stages. |
40652b65 MD |
42 | */ |
43 | ||
76e4f017 MD |
44 | /* |
45 | * LTTng name mapping macros. LTTng remaps some of the kernel events to | |
46 | * enforce name-spacing. | |
47 | */ | |
3bc29f0a | 48 | #undef LTTNG_TRACEPOINT_EVENT_MAP |
f127e61e | 49 | #define LTTNG_TRACEPOINT_EVENT_MAP(name, map, proto, args, fields) \ |
3bc29f0a | 50 | LTTNG_TRACEPOINT_EVENT_CLASS(map, \ |
76e4f017 MD |
51 | PARAMS(proto), \ |
52 | PARAMS(args), \ | |
f127e61e | 53 | PARAMS(fields)) \ |
3bc29f0a | 54 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), PARAMS(args)) |
76e4f017 | 55 | |
3bc29f0a | 56 | #undef LTTNG_TRACEPOINT_EVENT_MAP_NOARGS |
f127e61e | 57 | #define LTTNG_TRACEPOINT_EVENT_MAP_NOARGS(name, map, fields) \ |
3bc29f0a | 58 | LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(map, \ |
f127e61e | 59 | PARAMS(fields)) \ |
3bc29f0a | 60 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(map, name, map) |
76e4f017 | 61 | |
f127e61e | 62 | #undef LTTNG_TRACEPOINT_EVENT_CODE_MAP |
265822ae | 63 | #define LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, map, proto, args, _locvar, _code_pre, fields, _code_post) \ |
f127e61e MD |
64 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE(map, \ |
65 | PARAMS(proto), \ | |
66 | PARAMS(args), \ | |
67 | PARAMS(_locvar), \ | |
265822ae MD |
68 | PARAMS(_code_pre), \ |
69 | PARAMS(fields), \ | |
70 | PARAMS(_code_post)) \ | |
f127e61e MD |
71 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), PARAMS(args)) |
72 | ||
3bc29f0a | 73 | #undef LTTNG_TRACEPOINT_EVENT_CODE |
265822ae | 74 | #define LTTNG_TRACEPOINT_EVENT_CODE(name, proto, args, _locvar, _code_pre, fields, _code_post) \ |
f127e61e | 75 | LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, name, \ |
7ca580f8 MD |
76 | PARAMS(proto), \ |
77 | PARAMS(args), \ | |
78 | PARAMS(_locvar), \ | |
265822ae MD |
79 | PARAMS(_code_pre), \ |
80 | PARAMS(fields), \ | |
81 | PARAMS(_code_post)) | |
fcf7fa33 | 82 | |
40652b65 | 83 | /* |
3bc29f0a MD |
84 | * LTTNG_TRACEPOINT_EVENT_CLASS can be used to add a generic function |
85 | * handlers for events. That is, if all events have the same parameters | |
86 | * and just have distinct trace points. Each tracepoint can be defined | |
87 | * with LTTNG_TRACEPOINT_EVENT_INSTANCE and that will map the | |
88 | * LTTNG_TRACEPOINT_EVENT_CLASS to the tracepoint. | |
40652b65 | 89 | * |
3bc29f0a MD |
90 | * LTTNG_TRACEPOINT_EVENT is a one to one mapping between tracepoint and |
91 | * template. | |
40652b65 | 92 | */ |
6db3d13b | 93 | |
3bc29f0a | 94 | #undef LTTNG_TRACEPOINT_EVENT |
f127e61e | 95 | #define LTTNG_TRACEPOINT_EVENT(name, proto, args, fields) \ |
3bc29f0a MD |
96 | LTTNG_TRACEPOINT_EVENT_MAP(name, name, \ |
97 | PARAMS(proto), \ | |
98 | PARAMS(args), \ | |
f127e61e | 99 | PARAMS(fields)) |
40652b65 | 100 | |
3bc29f0a | 101 | #undef LTTNG_TRACEPOINT_EVENT_NOARGS |
f127e61e MD |
102 | #define LTTNG_TRACEPOINT_EVENT_NOARGS(name, fields) \ |
103 | LTTNG_TRACEPOINT_EVENT_MAP_NOARGS(name, name, PARAMS(fields)) | |
76e4f017 | 104 | |
3bc29f0a MD |
105 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE |
106 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE(template, name, proto, args) \ | |
107 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(template, name, name, PARAMS(proto), PARAMS(args)) | |
76e4f017 | 108 | |
3bc29f0a MD |
109 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS |
110 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(template, name) \ | |
111 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(template, name, name) | |
76e4f017 | 112 | |
3bc29f0a | 113 | #undef LTTNG_TRACEPOINT_EVENT_CLASS |
f127e61e | 114 | #define LTTNG_TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ |
3bc29f0a | 115 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, PARAMS(_proto), PARAMS(_args), , , \ |
265822ae | 116 | PARAMS(_fields), ) |
7ca580f8 | 117 | |
3bc29f0a | 118 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS |
f127e61e | 119 | #define LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ |
265822ae | 120 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, , , PARAMS(_fields), ) |
7ca580f8 MD |
121 | |
122 | ||
f62b389e | 123 | /* |
c099397a | 124 | * Stage 1 of the trace events. |
f62b389e MD |
125 | * |
126 | * Create dummy trace calls for each events, verifying that the LTTng module | |
3bc29f0a MD |
127 | * instrumentation headers match the kernel arguments. Will be optimized |
128 | * out by the compiler. | |
f62b389e MD |
129 | */ |
130 | ||
f127e61e | 131 | /* Reset all macros within TRACEPOINT_EVENT */ |
ba012e22 | 132 | #include <probes/lttng-events-reset.h> |
f62b389e MD |
133 | |
134 | #undef TP_PROTO | |
f127e61e | 135 | #define TP_PROTO(...) __VA_ARGS__ |
f62b389e MD |
136 | |
137 | #undef TP_ARGS | |
f127e61e | 138 | #define TP_ARGS(...) __VA_ARGS__ |
f62b389e | 139 | |
3bc29f0a MD |
140 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP |
141 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ | |
7eb827f2 | 142 | void trace_##_name(_proto); |
f62b389e | 143 | |
3bc29f0a MD |
144 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS |
145 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ | |
cb1aa0c7 | 146 | void trace_##_name(void); |
f7bdf4db | 147 | |
f62b389e MD |
148 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
149 | ||
d0558de2 MD |
150 | /* |
151 | * Stage 1.1 of the trace events. | |
152 | * | |
153 | * Create dummy trace prototypes for each event class, and for each used | |
154 | * template. This will allow checking whether the prototypes from the | |
155 | * class and the instance using the class actually match. | |
156 | */ | |
157 | ||
ba012e22 | 158 | #include <probes/lttng-events-reset.h> /* Reset all macros within TRACE_EVENT */ |
d0558de2 MD |
159 | |
160 | #undef TP_PROTO | |
161 | #define TP_PROTO(...) __VA_ARGS__ | |
162 | ||
163 | #undef TP_ARGS | |
164 | #define TP_ARGS(...) __VA_ARGS__ | |
165 | ||
166 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP | |
167 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ | |
168 | void __event_template_proto___##_template(_proto); | |
169 | ||
170 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS | |
171 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ | |
172 | void __event_template_proto___##_template(void); | |
173 | ||
174 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE | |
265822ae | 175 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
d0558de2 MD |
176 | void __event_template_proto___##_name(_proto); |
177 | ||
178 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS | |
265822ae | 179 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
d0558de2 MD |
180 | void __event_template_proto___##_name(void); |
181 | ||
182 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
183 | ||
6db3d13b | 184 | /* |
c099397a | 185 | * Stage 2 of the trace events. |
6db3d13b MD |
186 | * |
187 | * Create event field type metadata section. | |
188 | * Each event produce an array of fields. | |
189 | */ | |
190 | ||
f127e61e | 191 | /* Reset all macros within TRACEPOINT_EVENT */ |
ba012e22 MD |
192 | #include <probes/lttng-events-reset.h> |
193 | #include <probes/lttng-events-write.h> | |
194 | #include <probes/lttng-events-nowrite.h> | |
6db3d13b | 195 | |
f127e61e MD |
196 | #undef _ctf_integer_ext |
197 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \ | |
c099397a MD |
198 | { \ |
199 | .name = #_item, \ | |
43803cf2 | 200 | .type = __type_integer(_type, 0, 0, -1, _byte_order, _base, none),\ |
f127e61e MD |
201 | .nowrite = _nowrite, \ |
202 | .user = _user, \ | |
c099397a | 203 | }, |
40652b65 | 204 | |
f127e61e MD |
205 | #undef _ctf_array_encoded |
206 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \ | |
299338c8 | 207 | { \ |
c099397a MD |
208 | .name = #_item, \ |
209 | .type = \ | |
210 | { \ | |
299338c8 | 211 | .atype = atype_array, \ |
f127e61e | 212 | .u = \ |
c099397a | 213 | { \ |
f127e61e MD |
214 | .array = \ |
215 | { \ | |
43803cf2 | 216 | .elem_type = __type_integer(_type, 0, 0, 0, __BYTE_ORDER, 10, _encoding), \ |
f127e61e MD |
217 | .length = _length, \ |
218 | } \ | |
219 | } \ | |
299338c8 | 220 | }, \ |
f127e61e MD |
221 | .nowrite = _nowrite, \ |
222 | .user = _user, \ | |
299338c8 | 223 | }, |
40652b65 | 224 | |
43803cf2 MD |
225 | #undef _ctf_array_bitfield |
226 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ | |
227 | { \ | |
228 | .name = #_item, \ | |
229 | .type = \ | |
230 | { \ | |
231 | .atype = atype_array, \ | |
232 | .u = \ | |
233 | { \ | |
234 | .array = \ | |
235 | { \ | |
236 | .elem_type = __type_integer(_type, 1, 1, 0, __LITTLE_ENDIAN, 10, none), \ | |
237 | .length = (_length) * sizeof(_type) * CHAR_BIT, \ | |
238 | .elem_alignment = lttng_alignof(_type), \ | |
239 | } \ | |
240 | } \ | |
241 | }, \ | |
242 | .nowrite = _nowrite, \ | |
243 | .user = _user, \ | |
244 | }, | |
245 | ||
246 | ||
f127e61e MD |
247 | #undef _ctf_sequence_encoded |
248 | #define _ctf_sequence_encoded(_type, _item, _src, \ | |
249 | _length_type, _src_length, _encoding, \ | |
57ede728 | 250 | _byte_order, _base, _user, _nowrite) \ |
299338c8 | 251 | { \ |
c099397a MD |
252 | .name = #_item, \ |
253 | .type = \ | |
254 | { \ | |
299338c8 | 255 | .atype = atype_sequence, \ |
f127e61e | 256 | .u = \ |
c099397a | 257 | { \ |
f127e61e MD |
258 | .sequence = \ |
259 | { \ | |
43803cf2 MD |
260 | .length_type = __type_integer(_length_type, 0, 0, 0, __BYTE_ORDER, 10, none), \ |
261 | .elem_type = __type_integer(_type, 0, 0, -1, _byte_order, _base, _encoding), \ | |
262 | }, \ | |
263 | }, \ | |
264 | }, \ | |
265 | .nowrite = _nowrite, \ | |
266 | .user = _user, \ | |
267 | }, | |
268 | ||
269 | #undef _ctf_sequence_bitfield | |
270 | #define _ctf_sequence_bitfield(_type, _item, _src, \ | |
271 | _length_type, _src_length, \ | |
272 | _user, _nowrite) \ | |
273 | { \ | |
274 | .name = #_item, \ | |
275 | .type = \ | |
276 | { \ | |
277 | .atype = atype_sequence, \ | |
278 | .u = \ | |
279 | { \ | |
280 | .sequence = \ | |
281 | { \ | |
282 | .length_type = __type_integer(_length_type, 0, 0, 0, __BYTE_ORDER, 10, none), \ | |
283 | .elem_type = __type_integer(_type, 1, 1, 0, __LITTLE_ENDIAN, 10, none), \ | |
284 | .elem_alignment = lttng_alignof(_type), \ | |
f127e61e | 285 | }, \ |
c099397a | 286 | }, \ |
299338c8 | 287 | }, \ |
f127e61e MD |
288 | .nowrite = _nowrite, \ |
289 | .user = _user, \ | |
299338c8 | 290 | }, |
40652b65 | 291 | |
f127e61e MD |
292 | #undef _ctf_string |
293 | #define _ctf_string(_item, _src, _user, _nowrite) \ | |
299338c8 | 294 | { \ |
c099397a MD |
295 | .name = #_item, \ |
296 | .type = \ | |
297 | { \ | |
299338c8 | 298 | .atype = atype_string, \ |
f127e61e MD |
299 | .u = \ |
300 | { \ | |
301 | .basic = { .string = { .encoding = lttng_encode_UTF8 } } \ | |
302 | }, \ | |
299338c8 | 303 | }, \ |
f127e61e MD |
304 | .nowrite = _nowrite, \ |
305 | .user = _user, \ | |
299338c8 | 306 | }, |
1d12cebd | 307 | |
f127e61e MD |
308 | #undef TP_FIELDS |
309 | #define TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */ | |
1d12cebd | 310 | |
3bc29f0a | 311 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
265822ae | 312 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
0d1d4002 | 313 | static const struct lttng_event_field __event_fields___##_name[] = { \ |
f127e61e | 314 | _fields \ |
299338c8 MD |
315 | }; |
316 | ||
3bc29f0a | 317 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
265822ae MD |
318 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
319 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, PARAMS(_fields), _code_post) | |
f7bdf4db | 320 | |
299338c8 MD |
321 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
322 | ||
19c57fbf | 323 | /* |
c099397a | 324 | * Stage 3 of the trace events. |
19c57fbf MD |
325 | * |
326 | * Create probe callback prototypes. | |
327 | */ | |
328 | ||
f127e61e | 329 | /* Reset all macros within TRACEPOINT_EVENT */ |
ba012e22 | 330 | #include <probes/lttng-events-reset.h> |
19c57fbf MD |
331 | |
332 | #undef TP_PROTO | |
f127e61e | 333 | #define TP_PROTO(...) __VA_ARGS__ |
19c57fbf | 334 | |
3bc29f0a | 335 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
265822ae | 336 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
19c57fbf MD |
337 | static void __event_probe__##_name(void *__data, _proto); |
338 | ||
3bc29f0a | 339 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
265822ae | 340 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
f7bdf4db MD |
341 | static void __event_probe__##_name(void *__data); |
342 | ||
19c57fbf MD |
343 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
344 | ||
f7bdf4db MD |
345 | /* |
346 | * Stage 4 of the trace events. | |
347 | * | |
40652b65 MD |
348 | * Create static inline function that calculates event size. |
349 | */ | |
350 | ||
f127e61e | 351 | /* Reset all macros within TRACEPOINT_EVENT */ |
ba012e22 MD |
352 | #include <probes/lttng-events-reset.h> |
353 | #include <probes/lttng-events-write.h> | |
6db3d13b | 354 | |
f127e61e MD |
355 | #undef _ctf_integer_ext |
356 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \ | |
a90917c3 | 357 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
0d1d4002 | 358 | __event_len += sizeof(_type); |
6db3d13b | 359 | |
f127e61e MD |
360 | #undef _ctf_array_encoded |
361 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \ | |
a90917c3 | 362 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
0d1d4002 | 363 | __event_len += sizeof(_type) * (_length); |
6db3d13b | 364 | |
43803cf2 MD |
365 | #undef _ctf_array_bitfield |
366 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ | |
367 | _ctf_array_encoded(_type, _item, _src, _length, none, _user, _nowrite) | |
368 | ||
f127e61e MD |
369 | #undef _ctf_sequence_encoded |
370 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
57ede728 | 371 | _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ |
f127e61e MD |
372 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_length_type)); \ |
373 | __event_len += sizeof(_length_type); \ | |
a90917c3 | 374 | __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ |
f127e61e | 375 | __dynamic_len[__dynamic_len_idx] = (_src_length); \ |
41b59694 MD |
376 | __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ |
377 | __dynamic_len_idx++; | |
6db3d13b | 378 | |
43803cf2 MD |
379 | #undef _ctf_sequence_bitfield |
380 | #define _ctf_sequence_bitfield(_type, _item, _src, \ | |
381 | _length_type, _src_length, \ | |
382 | _user, _nowrite) \ | |
383 | _ctf_sequence_encoded(_type, _item, _src, _length_type, _src_length, \ | |
384 | none, __LITTLE_ENDIAN, 10, _user, _nowrite) | |
385 | ||
d0255731 | 386 | /* |
f127e61e | 387 | * ctf_user_string includes \0. If returns 0, it faulted, so we set size to |
786b8312 | 388 | * 1 (\0 only). |
d0255731 | 389 | */ |
f127e61e MD |
390 | #undef _ctf_string |
391 | #define _ctf_string(_item, _src, _user, _nowrite) \ | |
392 | if (_user) \ | |
393 | __event_len += __dynamic_len[__dynamic_len_idx++] = \ | |
96d0248a | 394 | max_t(size_t, lttng_strlen_user_inatomic(_src), 1); \ |
f127e61e MD |
395 | else \ |
396 | __event_len += __dynamic_len[__dynamic_len_idx++] = \ | |
98e38a60 | 397 | strlen((_src) ? (_src) : __LTTNG_NULL_STRING) + 1; |
c6e3f225 | 398 | |
0d1d4002 | 399 | #undef TP_PROTO |
f127e61e | 400 | #define TP_PROTO(...) __VA_ARGS__ |
6db3d13b | 401 | |
f127e61e MD |
402 | #undef TP_FIELDS |
403 | #define TP_FIELDS(...) __VA_ARGS__ | |
6db3d13b | 404 | |
7ca580f8 MD |
405 | #undef TP_locvar |
406 | #define TP_locvar(...) __VA_ARGS__ | |
407 | ||
3bc29f0a | 408 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
265822ae | 409 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
7ca580f8 MD |
410 | static inline size_t __event_get_size__##_name(size_t *__dynamic_len, \ |
411 | void *__tp_locvar, _proto) \ | |
0d1d4002 MD |
412 | { \ |
413 | size_t __event_len = 0; \ | |
d3de7f14 | 414 | unsigned int __dynamic_len_idx __attribute__((unused)) = 0; \ |
7ca580f8 | 415 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
d3de7f14 | 416 | \ |
f127e61e | 417 | _fields \ |
d3de7f14 MD |
418 | return __event_len; \ |
419 | } | |
420 | ||
3bc29f0a | 421 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
265822ae | 422 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
7ca580f8 MD |
423 | static inline size_t __event_get_size__##_name(size_t *__dynamic_len, \ |
424 | void *__tp_locvar) \ | |
d3de7f14 MD |
425 | { \ |
426 | size_t __event_len = 0; \ | |
427 | unsigned int __dynamic_len_idx __attribute__((unused)) = 0; \ | |
7ca580f8 | 428 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
0d1d4002 | 429 | \ |
f127e61e | 430 | _fields \ |
0d1d4002 | 431 | return __event_len; \ |
6db3d13b | 432 | } |
40652b65 MD |
433 | |
434 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
435 | ||
f127e61e | 436 | |
40652b65 | 437 | /* |
f127e61e | 438 | * Stage 4.1 of tracepoint event generation. |
e763dbf5 | 439 | * |
f127e61e MD |
440 | * Create static inline function that layout the filter stack data. |
441 | * We make both write and nowrite data available to the filter. | |
e763dbf5 MD |
442 | */ |
443 | ||
f127e61e | 444 | /* Reset all macros within TRACEPOINT_EVENT */ |
ba012e22 MD |
445 | #include <probes/lttng-events-reset.h> |
446 | #include <probes/lttng-events-write.h> | |
447 | #include <probes/lttng-events-nowrite.h> | |
f127e61e MD |
448 | |
449 | #undef _ctf_integer_ext_fetched | |
450 | #define _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) \ | |
451 | if (lttng_is_signed_type(_type)) { \ | |
452 | int64_t __ctf_tmp_int64; \ | |
453 | switch (sizeof(_type)) { \ | |
454 | case 1: \ | |
455 | { \ | |
456 | union { _type t; int8_t v; } __tmp = { (_type) (_src) }; \ | |
457 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ | |
458 | break; \ | |
459 | } \ | |
460 | case 2: \ | |
461 | { \ | |
462 | union { _type t; int16_t v; } __tmp = { (_type) (_src) }; \ | |
814f7d25 MD |
463 | if (_byte_order != __BYTE_ORDER) \ |
464 | __swab16s(&__tmp.v); \ | |
f127e61e MD |
465 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ |
466 | break; \ | |
467 | } \ | |
468 | case 4: \ | |
469 | { \ | |
470 | union { _type t; int32_t v; } __tmp = { (_type) (_src) }; \ | |
814f7d25 MD |
471 | if (_byte_order != __BYTE_ORDER) \ |
472 | __swab32s(&__tmp.v); \ | |
f127e61e MD |
473 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ |
474 | break; \ | |
475 | } \ | |
476 | case 8: \ | |
477 | { \ | |
478 | union { _type t; int64_t v; } __tmp = { (_type) (_src) }; \ | |
814f7d25 MD |
479 | if (_byte_order != __BYTE_ORDER) \ |
480 | __swab64s(&__tmp.v); \ | |
f127e61e MD |
481 | __ctf_tmp_int64 = (int64_t) __tmp.v; \ |
482 | break; \ | |
483 | } \ | |
484 | default: \ | |
485 | BUG_ON(1); \ | |
486 | }; \ | |
487 | memcpy(__stack_data, &__ctf_tmp_int64, sizeof(int64_t)); \ | |
488 | } else { \ | |
489 | uint64_t __ctf_tmp_uint64; \ | |
490 | switch (sizeof(_type)) { \ | |
491 | case 1: \ | |
492 | { \ | |
493 | union { _type t; uint8_t v; } __tmp = { (_type) (_src) }; \ | |
494 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ | |
495 | break; \ | |
496 | } \ | |
497 | case 2: \ | |
498 | { \ | |
499 | union { _type t; uint16_t v; } __tmp = { (_type) (_src) }; \ | |
814f7d25 MD |
500 | if (_byte_order != __BYTE_ORDER) \ |
501 | __swab16s(&__tmp.v); \ | |
f127e61e MD |
502 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ |
503 | break; \ | |
504 | } \ | |
505 | case 4: \ | |
506 | { \ | |
507 | union { _type t; uint32_t v; } __tmp = { (_type) (_src) }; \ | |
814f7d25 MD |
508 | if (_byte_order != __BYTE_ORDER) \ |
509 | __swab32s(&__tmp.v); \ | |
f127e61e MD |
510 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ |
511 | break; \ | |
512 | } \ | |
513 | case 8: \ | |
514 | { \ | |
515 | union { _type t; uint64_t v; } __tmp = { (_type) (_src) }; \ | |
814f7d25 MD |
516 | if (_byte_order != __BYTE_ORDER) \ |
517 | __swab64s(&__tmp.v); \ | |
f127e61e MD |
518 | __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ |
519 | break; \ | |
520 | } \ | |
521 | default: \ | |
522 | BUG_ON(1); \ | |
523 | }; \ | |
524 | memcpy(__stack_data, &__ctf_tmp_uint64, sizeof(uint64_t)); \ | |
525 | } \ | |
526 | __stack_data += sizeof(int64_t); | |
527 | ||
528 | #undef _ctf_integer_ext_isuser0 | |
529 | #define _ctf_integer_ext_isuser0(_type, _item, _src, _byte_order, _base, _nowrite) \ | |
530 | _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) | |
531 | ||
532 | #undef _ctf_integer_ext_isuser1 | |
533 | #define _ctf_integer_ext_isuser1(_type, _item, _user_src, _byte_order, _base, _nowrite) \ | |
85522867 MD |
534 | { \ |
535 | union { \ | |
536 | char __array[sizeof(_user_src)]; \ | |
537 | __typeof__(_user_src) __v; \ | |
538 | } __tmp_fetch; \ | |
539 | if (lib_ring_buffer_copy_from_user_check_nofault(__tmp_fetch.__array, \ | |
540 | &(_user_src), sizeof(_user_src))) \ | |
541 | memset(__tmp_fetch.__array, 0, sizeof(__tmp_fetch.__array)); \ | |
542 | _ctf_integer_ext_fetched(_type, _item, __tmp_fetch.__v, _byte_order, _base, _nowrite) \ | |
f127e61e | 543 | } |
e763dbf5 | 544 | |
f127e61e MD |
545 | #undef _ctf_integer_ext |
546 | #define _ctf_integer_ext(_type, _item, _user_src, _byte_order, _base, _user, _nowrite) \ | |
547 | _ctf_integer_ext_isuser##_user(_type, _item, _user_src, _byte_order, _base, _nowrite) | |
548 | ||
549 | #undef _ctf_array_encoded | |
550 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \ | |
551 | { \ | |
552 | unsigned long __ctf_tmp_ulong = (unsigned long) (_length); \ | |
553 | const void *__ctf_tmp_ptr = (_src); \ | |
554 | memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \ | |
555 | __stack_data += sizeof(unsigned long); \ | |
6b272cda MD |
556 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \ |
557 | __stack_data += sizeof(void *); \ | |
f127e61e MD |
558 | } |
559 | ||
43803cf2 MD |
560 | #undef _ctf_array_bitfield |
561 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ | |
562 | _ctf_array_encoded(_type, _item, _src, _length, none, _user, _nowrite) | |
563 | ||
f127e61e MD |
564 | #undef _ctf_sequence_encoded |
565 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
57ede728 | 566 | _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ |
f127e61e MD |
567 | { \ |
568 | unsigned long __ctf_tmp_ulong = (unsigned long) (_src_length); \ | |
569 | const void *__ctf_tmp_ptr = (_src); \ | |
570 | memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \ | |
571 | __stack_data += sizeof(unsigned long); \ | |
6b272cda MD |
572 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \ |
573 | __stack_data += sizeof(void *); \ | |
f127e61e MD |
574 | } |
575 | ||
43803cf2 MD |
576 | #undef _ctf_sequence_bitfield |
577 | #define _ctf_sequence_bitfield(_type, _item, _src, \ | |
578 | _length_type, _src_length, \ | |
579 | _user, _nowrite) \ | |
580 | _ctf_sequence_encoded(_type, _item, _src, _length_type, _src_length, \ | |
581 | none, __LITTLE_ENDIAN, 10, _user, _nowrite) | |
582 | ||
f127e61e MD |
583 | #undef _ctf_string |
584 | #define _ctf_string(_item, _src, _user, _nowrite) \ | |
585 | { \ | |
98e38a60 MD |
586 | const void *__ctf_tmp_ptr = \ |
587 | ((_src) ? (_src) : __LTTNG_NULL_STRING); \ | |
6b272cda MD |
588 | memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \ |
589 | __stack_data += sizeof(void *); \ | |
f127e61e | 590 | } |
c6e3f225 | 591 | |
e763dbf5 | 592 | #undef TP_PROTO |
f127e61e | 593 | #define TP_PROTO(...) __VA_ARGS__ |
e763dbf5 | 594 | |
f127e61e MD |
595 | #undef TP_FIELDS |
596 | #define TP_FIELDS(...) __VA_ARGS__ | |
e763dbf5 | 597 | |
7ca580f8 MD |
598 | #undef TP_locvar |
599 | #define TP_locvar(...) __VA_ARGS__ | |
600 | ||
f127e61e | 601 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
265822ae | 602 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
f127e61e MD |
603 | static inline \ |
604 | void __event_prepare_filter_stack__##_name(char *__stack_data, \ | |
605 | void *__tp_locvar) \ | |
e763dbf5 | 606 | { \ |
7ca580f8 MD |
607 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
608 | \ | |
f127e61e | 609 | _fields \ |
e763dbf5 MD |
610 | } |
611 | ||
f127e61e | 612 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
265822ae | 613 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
f127e61e MD |
614 | static inline \ |
615 | void __event_prepare_filter_stack__##_name(char *__stack_data, \ | |
616 | void *__tp_locvar, _proto) \ | |
d3de7f14 | 617 | { \ |
7ca580f8 MD |
618 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ |
619 | \ | |
f127e61e | 620 | _fields \ |
d3de7f14 MD |
621 | } |
622 | ||
e763dbf5 MD |
623 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
624 | ||
e763dbf5 | 625 | /* |
f127e61e | 626 | * Stage 5 of the trace events. |
40652b65 | 627 | * |
f127e61e | 628 | * Create static inline function that calculates event payload alignment. |
3c4ffab9 MD |
629 | */ |
630 | ||
f127e61e | 631 | /* Reset all macros within TRACEPOINT_EVENT */ |
ba012e22 MD |
632 | #include <probes/lttng-events-reset.h> |
633 | #include <probes/lttng-events-write.h> | |
3c4ffab9 | 634 | |
f127e61e MD |
635 | #undef _ctf_integer_ext |
636 | #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \ | |
637 | __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); | |
3c4ffab9 | 638 | |
f127e61e MD |
639 | #undef _ctf_array_encoded |
640 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \ | |
641 | __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); | |
3c4ffab9 | 642 | |
43803cf2 MD |
643 | #undef _ctf_array_bitfield |
644 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ | |
645 | _ctf_array_encoded(_type, _item, _src, _length, none, _user, _nowrite) | |
646 | ||
f127e61e MD |
647 | #undef _ctf_sequence_encoded |
648 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
57ede728 | 649 | _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ |
f127e61e MD |
650 | __event_align = max_t(size_t, __event_align, lttng_alignof(_length_type)); \ |
651 | __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); | |
64c796d8 | 652 | |
43803cf2 MD |
653 | #undef _ctf_sequence_bitfield |
654 | #define _ctf_sequence_bitfield(_type, _item, _src, \ | |
655 | _length_type, _src_length, \ | |
656 | _user, _nowrite) \ | |
657 | _ctf_sequence_encoded(_type, _item, _src, _length_type, _src_length, \ | |
658 | none, __LITTLE_ENDIAN, 10, _user, _nowrite) | |
659 | ||
f127e61e MD |
660 | #undef _ctf_string |
661 | #define _ctf_string(_item, _src, _user, _nowrite) | |
64c796d8 | 662 | |
f127e61e MD |
663 | #undef TP_PROTO |
664 | #define TP_PROTO(...) __VA_ARGS__ | |
84da5206 | 665 | |
f127e61e MD |
666 | #undef TP_FIELDS |
667 | #define TP_FIELDS(...) __VA_ARGS__ | |
c6e3f225 | 668 | |
f127e61e MD |
669 | #undef TP_locvar |
670 | #define TP_locvar(...) __VA_ARGS__ | |
3c4ffab9 | 671 | |
f127e61e | 672 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
265822ae | 673 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
f127e61e MD |
674 | static inline size_t __event_get_align__##_name(void *__tp_locvar, _proto) \ |
675 | { \ | |
676 | size_t __event_align = 1; \ | |
677 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ | |
678 | \ | |
679 | _fields \ | |
680 | return __event_align; \ | |
681 | } | |
3c4ffab9 | 682 | |
3bc29f0a | 683 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
265822ae | 684 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
f127e61e MD |
685 | static inline size_t __event_get_align__##_name(void *__tp_locvar) \ |
686 | { \ | |
687 | size_t __event_align = 1; \ | |
688 | struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ | |
689 | \ | |
690 | _fields \ | |
691 | return __event_align; \ | |
692 | } | |
d3de7f14 | 693 | |
3c4ffab9 MD |
694 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
695 | ||
3c4ffab9 | 696 | /* |
f127e61e | 697 | * Stage 6 of tracepoint event generation. |
e763dbf5 | 698 | * |
f127e61e MD |
699 | * Create the probe function. This function calls event size calculation |
700 | * and writes event data into the buffer. | |
40652b65 MD |
701 | */ |
702 | ||
f127e61e | 703 | /* Reset all macros within TRACEPOINT_EVENT */ |
ba012e22 MD |
704 | #include <probes/lttng-events-reset.h> |
705 | #include <probes/lttng-events-write.h> | |
c6e3f225 | 706 | |
f127e61e MD |
707 | #undef _ctf_integer_ext_fetched |
708 | #define _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) \ | |
e763dbf5 | 709 | { \ |
f127e61e MD |
710 | _type __tmp = _src; \ |
711 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ | |
aaa4004a | 712 | __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ |
f127e61e MD |
713 | } |
714 | ||
715 | #undef _ctf_integer_ext_isuser0 | |
716 | #define _ctf_integer_ext_isuser0(_type, _item, _src, _byte_order, _base, _nowrite) \ | |
717 | _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) | |
718 | ||
719 | #undef _ctf_integer_ext_isuser1 | |
720 | #define _ctf_integer_ext_isuser1(_type, _item, _user_src, _byte_order, _base, _nowrite) \ | |
721 | { \ | |
85522867 MD |
722 | union { \ |
723 | char __array[sizeof(_user_src)]; \ | |
724 | __typeof__(_user_src) __v; \ | |
725 | } __tmp_fetch; \ | |
726 | if (lib_ring_buffer_copy_from_user_check_nofault(__tmp_fetch.__array, \ | |
727 | &(_user_src), sizeof(_user_src))) \ | |
728 | memset(__tmp_fetch.__array, 0, sizeof(__tmp_fetch.__array)); \ | |
729 | _ctf_integer_ext_fetched(_type, _item, __tmp_fetch.__v, _byte_order, _base, _nowrite) \ | |
f127e61e MD |
730 | } |
731 | ||
732 | #undef _ctf_integer_ext | |
733 | #define _ctf_integer_ext(_type, _item, _user_src, _byte_order, _base, _user, _nowrite) \ | |
734 | _ctf_integer_ext_isuser##_user(_type, _item, _user_src, _byte_order, _base, _nowrite) | |
735 | ||
736 | #undef _ctf_array_encoded | |
737 | #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _user, _nowrite) \ | |
738 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
739 | if (_user) { \ | |
740 | __chan->ops->event_write_from_user(&__ctx, _src, sizeof(_type) * (_length)); \ | |
741 | } else { \ | |
742 | __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); \ | |
743 | } | |
744 | ||
43803cf2 MD |
745 | #if (__BYTE_ORDER == __LITTLE_ENDIAN) |
746 | #undef _ctf_array_bitfield | |
747 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ | |
748 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
749 | if (_user) { \ | |
750 | __chan->ops->event_write_from_user(&__ctx, _src, sizeof(_type) * (_length)); \ | |
751 | } else { \ | |
752 | __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); \ | |
753 | } | |
754 | #else /* #if (__BYTE_ORDER == __LITTLE_ENDIAN) */ | |
755 | /* | |
756 | * For big endian, we need to byteswap into little endian. | |
757 | */ | |
758 | #undef _ctf_array_bitfield | |
759 | #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ | |
760 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
761 | { \ | |
762 | size_t _i; \ | |
763 | \ | |
764 | for (_i = 0; _i < (_length); _i++) { \ | |
765 | _type _tmp; \ | |
766 | \ | |
767 | if (_user) { \ | |
768 | if (get_user(_tmp, (_type *) _src + _i)) \ | |
769 | _tmp = 0; \ | |
770 | } else { \ | |
771 | _tmp = ((_type *) _src)[_i]; \ | |
772 | } \ | |
773 | switch (sizeof(_type)) { \ | |
774 | case 1: \ | |
775 | break; \ | |
776 | case 2: \ | |
777 | _tmp = cpu_to_le16(_tmp); \ | |
778 | break; \ | |
779 | case 4: \ | |
780 | _tmp = cpu_to_le32(_tmp); \ | |
781 | break; \ | |
782 | case 8: \ | |
783 | _tmp = cpu_to_le64(_tmp); \ | |
784 | break; \ | |
785 | default: \ | |
786 | BUG_ON(1); \ | |
787 | } \ | |
788 | __chan->ops->event_write(&__ctx, &_tmp, sizeof(_type)); \ | |
789 | } \ | |
790 | } | |
791 | #endif /* #else #if (__BYTE_ORDER == __LITTLE_ENDIAN) */ | |
792 | ||
f127e61e MD |
793 | #undef _ctf_sequence_encoded |
794 | #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ | |
57ede728 | 795 | _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ |
84da5206 | 796 | { \ |
f127e61e MD |
797 | _length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx]; \ |
798 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ | |
799 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ | |
84da5206 | 800 | } \ |
f127e61e MD |
801 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ |
802 | if (_user) { \ | |
803 | __chan->ops->event_write_from_user(&__ctx, _src, \ | |
804 | sizeof(_type) * __get_dynamic_len(dest)); \ | |
805 | } else { \ | |
806 | __chan->ops->event_write(&__ctx, _src, \ | |
807 | sizeof(_type) * __get_dynamic_len(dest)); \ | |
808 | } | |
809 | ||
43803cf2 MD |
810 | #if (__BYTE_ORDER == __LITTLE_ENDIAN) |
811 | #undef _ctf_sequence_bitfield | |
812 | #define _ctf_sequence_bitfield(_type, _item, _src, \ | |
813 | _length_type, _src_length, \ | |
814 | _user, _nowrite) \ | |
815 | { \ | |
816 | _length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx] * sizeof(_type) * CHAR_BIT; \ | |
817 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ | |
818 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ | |
819 | } \ | |
820 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
821 | if (_user) { \ | |
822 | __chan->ops->event_write_from_user(&__ctx, _src, \ | |
823 | sizeof(_type) * __get_dynamic_len(dest)); \ | |
824 | } else { \ | |
825 | __chan->ops->event_write(&__ctx, _src, \ | |
826 | sizeof(_type) * __get_dynamic_len(dest)); \ | |
827 | } | |
828 | #else /* #if (__BYTE_ORDER == __LITTLE_ENDIAN) */ | |
829 | /* | |
830 | * For big endian, we need to byteswap into little endian. | |
831 | */ | |
832 | #undef _ctf_sequence_bitfield | |
833 | #define _ctf_sequence_bitfield(_type, _item, _src, \ | |
834 | _length_type, _src_length, \ | |
835 | _user, _nowrite) \ | |
836 | { \ | |
837 | _length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx] * sizeof(_type) * CHAR_BIT; \ | |
838 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ | |
839 | __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ | |
840 | } \ | |
841 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ | |
842 | { \ | |
843 | size_t _i, _length; \ | |
844 | \ | |
845 | _length = __get_dynamic_len(dest); \ | |
846 | for (_i = 0; _i < _length; _i++) { \ | |
847 | _type _tmp; \ | |
848 | \ | |
849 | if (_user) { \ | |
850 | if (get_user(_tmp, (_type *) _src + _i)) \ | |
851 | _tmp = 0; \ | |
852 | } else { \ | |
853 | _tmp = ((_type *) _src)[_i]; \ | |
854 | } \ | |
855 | switch (sizeof(_type)) { \ | |
856 | case 1: \ | |
857 | break; \ | |
858 | case 2: \ | |
859 | _tmp = cpu_to_le16(_tmp); \ | |
860 | break; \ | |
861 | case 4: \ | |
862 | _tmp = cpu_to_le32(_tmp); \ | |
863 | break; \ | |
864 | case 8: \ | |
865 | _tmp = cpu_to_le64(_tmp); \ | |
866 | break; \ | |
867 | default: \ | |
868 | BUG_ON(1); \ | |
869 | } \ | |
870 | __chan->ops->event_write(&__ctx, &_tmp, sizeof(_type)); \ | |
871 | } \ | |
872 | } | |
873 | #endif /* #else #if (__BYTE_ORDER == __LITTLE_ENDIAN) */ | |
874 | ||
f127e61e MD |
875 | #undef _ctf_string |
876 | #define _ctf_string(_item, _src, _user, _nowrite) \ | |
f127e61e | 877 | if (_user) { \ |
98e38a60 | 878 | lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src))); \ |
f127e61e MD |
879 | __chan->ops->event_strcpy_from_user(&__ctx, _src, \ |
880 | __get_dynamic_len(dest)); \ | |
881 | } else { \ | |
98e38a60 MD |
882 | const char *__ctf_tmp_string = \ |
883 | ((_src) ? (_src) : __LTTNG_NULL_STRING); \ | |
884 | lib_ring_buffer_align_ctx(&__ctx, \ | |
885 | lttng_alignof(*__ctf_tmp_string)); \ | |
886 | __chan->ops->event_strcpy(&__ctx, __ctf_tmp_string, \ | |
f127e61e MD |
887 | __get_dynamic_len(dest)); \ |
888 | } | |
e763dbf5 MD |
889 | |
890 | /* Beware: this get len actually consumes the len value */ | |
f127e61e MD |
891 | #undef __get_dynamic_len |
892 | #define __get_dynamic_len(field) __stackvar.__dynamic_len[__dynamic_len_idx++] | |
e763dbf5 MD |
893 | |
894 | #undef TP_PROTO | |
f127e61e | 895 | #define TP_PROTO(...) __VA_ARGS__ |
e763dbf5 MD |
896 | |
897 | #undef TP_ARGS | |
f127e61e | 898 | #define TP_ARGS(...) __VA_ARGS__ |
e763dbf5 | 899 | |
f127e61e MD |
900 | #undef TP_FIELDS |
901 | #define TP_FIELDS(...) __VA_ARGS__ | |
e763dbf5 | 902 | |
7ca580f8 MD |
903 | #undef TP_locvar |
904 | #define TP_locvar(...) __VA_ARGS__ | |
905 | ||
265822ae MD |
906 | #undef TP_code_pre |
907 | #define TP_code_pre(...) __VA_ARGS__ | |
908 | ||
909 | #undef TP_code_post | |
910 | #define TP_code_post(...) __VA_ARGS__ | |
7ca580f8 | 911 | |
c337ddc2 MD |
912 | /* |
913 | * For state dump, check that "session" argument (mandatory) matches the | |
914 | * session this event belongs to. Ensures that we write state dump data only | |
915 | * into the started session, not into all sessions. | |
916 | */ | |
917 | #ifdef TP_SESSION_CHECK | |
918 | #define _TP_SESSION_CHECK(session, csession) (session == csession) | |
919 | #else /* TP_SESSION_CHECK */ | |
920 | #define _TP_SESSION_CHECK(session, csession) 1 | |
921 | #endif /* TP_SESSION_CHECK */ | |
922 | ||
f9771d39 | 923 | /* |
f127e61e MD |
924 | * Using twice size for filter stack data to hold size and pointer for |
925 | * each field (worse case). For integers, max size required is 64-bit. | |
926 | * Same for double-precision floats. Those fit within | |
927 | * 2*sizeof(unsigned long) for all supported architectures. | |
928 | * Perform UNION (||) of filter runtime list. | |
f9771d39 | 929 | */ |
3bc29f0a | 930 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE |
265822ae | 931 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ |
e763dbf5 MD |
932 | static void __event_probe__##_name(void *__data, _proto) \ |
933 | { \ | |
7ca580f8 | 934 | struct probe_local_vars { _locvar }; \ |
a90917c3 | 935 | struct lttng_event *__event = __data; \ |
79150a49 JD |
936 | struct lttng_probe_ctx __lttng_probe_ctx = { \ |
937 | .event = __event, \ | |
ccecf3fb | 938 | .interruptible = !irqs_disabled(), \ |
79150a49 | 939 | }; \ |
a90917c3 | 940 | struct lttng_channel *__chan = __event->chan; \ |
e0130fab | 941 | struct lttng_session *__session = __chan->session; \ |
aaa4004a | 942 | struct lib_ring_buffer_ctx __ctx; \ |
e763dbf5 | 943 | size_t __event_len, __event_align; \ |
d3de7f14 | 944 | size_t __dynamic_len_idx __attribute__((unused)) = 0; \ |
f127e61e MD |
945 | union { \ |
946 | size_t __dynamic_len[ARRAY_SIZE(__event_fields___##_name)]; \ | |
947 | char __filter_stack_data[2 * sizeof(unsigned long) * ARRAY_SIZE(__event_fields___##_name)]; \ | |
948 | } __stackvar; \ | |
e763dbf5 | 949 | int __ret; \ |
7ca580f8 MD |
950 | struct probe_local_vars __tp_locvar; \ |
951 | struct probe_local_vars *tp_locvar __attribute__((unused)) = \ | |
952 | &__tp_locvar; \ | |
e0130fab | 953 | struct lttng_pid_tracker *__lpf; \ |
e763dbf5 | 954 | \ |
e0130fab | 955 | if (!_TP_SESSION_CHECK(session, __session)) \ |
c337ddc2 | 956 | return; \ |
e0130fab | 957 | if (unlikely(!ACCESS_ONCE(__session->active))) \ |
e64957da MD |
958 | return; \ |
959 | if (unlikely(!ACCESS_ONCE(__chan->enabled))) \ | |
960 | return; \ | |
961 | if (unlikely(!ACCESS_ONCE(__event->enabled))) \ | |
52fc2e1f | 962 | return; \ |
7a09dcb7 | 963 | __lpf = lttng_rcu_dereference(__session->pid_tracker); \ |
c846d31a | 964 | if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->tgid))) \ |
e0130fab | 965 | return; \ |
265822ae | 966 | _code_pre \ |
f127e61e MD |
967 | if (unlikely(!list_empty(&__event->bytecode_runtime_head))) { \ |
968 | struct lttng_bytecode_runtime *bc_runtime; \ | |
969 | int __filter_record = __event->has_enablers_without_bytecode; \ | |
970 | \ | |
971 | __event_prepare_filter_stack__##_name(__stackvar.__filter_stack_data, \ | |
972 | tp_locvar, _args); \ | |
7a09dcb7 | 973 | lttng_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \ |
79150a49 | 974 | if (unlikely(bc_runtime->filter(bc_runtime, &__lttng_probe_ctx, \ |
f127e61e MD |
975 | __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \ |
976 | __filter_record = 1; \ | |
977 | } \ | |
978 | if (likely(!__filter_record)) \ | |
265822ae | 979 | goto __post; \ |
f127e61e MD |
980 | } \ |
981 | __event_len = __event_get_size__##_name(__stackvar.__dynamic_len, \ | |
982 | tp_locvar, _args); \ | |
7ca580f8 | 983 | __event_align = __event_get_align__##_name(tp_locvar, _args); \ |
79150a49 | 984 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, &__lttng_probe_ctx, __event_len, \ |
e763dbf5 | 985 | __event_align, -1); \ |
aaa4004a | 986 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ |
e763dbf5 | 987 | if (__ret < 0) \ |
265822ae | 988 | goto __post; \ |
f127e61e | 989 | _fields \ |
aaa4004a | 990 | __chan->ops->event_commit(&__ctx); \ |
265822ae MD |
991 | __post: \ |
992 | _code_post \ | |
993 | return; \ | |
e763dbf5 MD |
994 | } |
995 | ||
3bc29f0a | 996 | #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS |
265822ae | 997 | #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ |
f7bdf4db MD |
998 | static void __event_probe__##_name(void *__data) \ |
999 | { \ | |
7ca580f8 | 1000 | struct probe_local_vars { _locvar }; \ |
a90917c3 | 1001 | struct lttng_event *__event = __data; \ |
79150a49 JD |
1002 | struct lttng_probe_ctx __lttng_probe_ctx = { \ |
1003 | .event = __event, \ | |
ccecf3fb | 1004 | .interruptible = !irqs_disabled(), \ |
79150a49 | 1005 | }; \ |
a90917c3 | 1006 | struct lttng_channel *__chan = __event->chan; \ |
e0130fab | 1007 | struct lttng_session *__session = __chan->session; \ |
f7bdf4db MD |
1008 | struct lib_ring_buffer_ctx __ctx; \ |
1009 | size_t __event_len, __event_align; \ | |
d3de7f14 | 1010 | size_t __dynamic_len_idx __attribute__((unused)) = 0; \ |
f127e61e MD |
1011 | union { \ |
1012 | size_t __dynamic_len[ARRAY_SIZE(__event_fields___##_name)]; \ | |
1013 | char __filter_stack_data[2 * sizeof(unsigned long) * ARRAY_SIZE(__event_fields___##_name)]; \ | |
1014 | } __stackvar; \ | |
f7bdf4db | 1015 | int __ret; \ |
7ca580f8 MD |
1016 | struct probe_local_vars __tp_locvar; \ |
1017 | struct probe_local_vars *tp_locvar __attribute__((unused)) = \ | |
1018 | &__tp_locvar; \ | |
e0130fab | 1019 | struct lttng_pid_tracker *__lpf; \ |
f7bdf4db | 1020 | \ |
e0130fab | 1021 | if (!_TP_SESSION_CHECK(session, __session)) \ |
c337ddc2 | 1022 | return; \ |
e0130fab | 1023 | if (unlikely(!ACCESS_ONCE(__session->active))) \ |
f7bdf4db MD |
1024 | return; \ |
1025 | if (unlikely(!ACCESS_ONCE(__chan->enabled))) \ | |
1026 | return; \ | |
1027 | if (unlikely(!ACCESS_ONCE(__event->enabled))) \ | |
1028 | return; \ | |
7a09dcb7 | 1029 | __lpf = lttng_rcu_dereference(__session->pid_tracker); \ |
e0130fab MD |
1030 | if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid))) \ |
1031 | return; \ | |
265822ae | 1032 | _code_pre \ |
f127e61e MD |
1033 | if (unlikely(!list_empty(&__event->bytecode_runtime_head))) { \ |
1034 | struct lttng_bytecode_runtime *bc_runtime; \ | |
1035 | int __filter_record = __event->has_enablers_without_bytecode; \ | |
1036 | \ | |
1037 | __event_prepare_filter_stack__##_name(__stackvar.__filter_stack_data, \ | |
1038 | tp_locvar); \ | |
7a09dcb7 | 1039 | lttng_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \ |
79150a49 | 1040 | if (unlikely(bc_runtime->filter(bc_runtime, &__lttng_probe_ctx, \ |
f127e61e MD |
1041 | __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \ |
1042 | __filter_record = 1; \ | |
1043 | } \ | |
1044 | if (likely(!__filter_record)) \ | |
265822ae | 1045 | goto __post; \ |
f127e61e MD |
1046 | } \ |
1047 | __event_len = __event_get_size__##_name(__stackvar.__dynamic_len, tp_locvar); \ | |
7ca580f8 | 1048 | __event_align = __event_get_align__##_name(tp_locvar); \ |
79150a49 | 1049 | lib_ring_buffer_ctx_init(&__ctx, __chan->chan, &__lttng_probe_ctx, __event_len, \ |
f7bdf4db MD |
1050 | __event_align, -1); \ |
1051 | __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ | |
1052 | if (__ret < 0) \ | |
265822ae | 1053 | goto __post; \ |
f127e61e | 1054 | _fields \ |
f7bdf4db | 1055 | __chan->ops->event_commit(&__ctx); \ |
265822ae MD |
1056 | __post: \ |
1057 | _code_post \ | |
1058 | return; \ | |
f7bdf4db MD |
1059 | } |
1060 | ||
e763dbf5 MD |
1061 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) |
1062 | ||
f127e61e MD |
1063 | #undef __get_dynamic_len |
1064 | ||
1065 | /* | |
1066 | * Stage 7 of the trace events. | |
1067 | * | |
1068 | * Create event descriptions. | |
1069 | */ | |
1070 | ||
1071 | /* Named field types must be defined in lttng-types.h */ | |
1072 | ||
ba012e22 | 1073 | #include <probes/lttng-events-reset.h> /* Reset all macros within LTTNG_TRACEPOINT_EVENT */ |
f127e61e MD |
1074 | |
1075 | #ifndef TP_PROBE_CB | |
1076 | #define TP_PROBE_CB(_template) &__event_probe__##_template | |
1077 | #endif | |
1078 | ||
1079 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS | |
1080 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ | |
1081 | static const struct lttng_event_desc __event_desc___##_map = { \ | |
1082 | .fields = __event_fields___##_template, \ | |
1083 | .name = #_map, \ | |
1084 | .kname = #_name, \ | |
1085 | .probe_callback = (void *) TP_PROBE_CB(_template), \ | |
1086 | .nr_fields = ARRAY_SIZE(__event_fields___##_template), \ | |
1087 | .owner = THIS_MODULE, \ | |
1088 | }; | |
1089 | ||
1090 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP | |
1091 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ | |
1092 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) | |
1093 | ||
1094 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
1095 | ||
1096 | /* | |
1097 | * Stage 8 of the trace events. | |
1098 | * | |
1099 | * Create an array of event description pointers. | |
1100 | */ | |
1101 | ||
ba012e22 | 1102 | #include <probes/lttng-events-reset.h> /* Reset all macros within LTTNG_TRACEPOINT_EVENT */ |
f127e61e MD |
1103 | |
1104 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS | |
1105 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ | |
1106 | &__event_desc___##_map, | |
1107 | ||
1108 | #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP | |
1109 | #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ | |
1110 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) | |
1111 | ||
1112 | #define TP_ID1(_token, _system) _token##_system | |
1113 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
1114 | ||
1115 | static const struct lttng_event_desc *TP_ID(__event_desc___, TRACE_SYSTEM)[] = { | |
1116 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) | |
1117 | }; | |
1118 | ||
1119 | #undef TP_ID1 | |
1120 | #undef TP_ID | |
1121 | ||
1122 | /* | |
1123 | * Stage 9 of the trace events. | |
1124 | * | |
1125 | * Create a toplevel descriptor for the whole probe. | |
1126 | */ | |
1127 | ||
1128 | #define TP_ID1(_token, _system) _token##_system | |
1129 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
1130 | ||
1131 | /* non-const because list head will be modified when registered. */ | |
1132 | static __used struct lttng_probe_desc TP_ID(__probe_desc___, TRACE_SYSTEM) = { | |
1133 | .provider = __stringify(TRACE_SYSTEM), | |
1134 | .event_desc = TP_ID(__event_desc___, TRACE_SYSTEM), | |
1135 | .nr_events = ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)), | |
1136 | .head = { NULL, NULL }, | |
1137 | .lazy_init_head = { NULL, NULL }, | |
1138 | .lazy = 0, | |
1139 | }; | |
1140 | ||
1141 | #undef TP_ID1 | |
1142 | #undef TP_ID | |
1143 | ||
3afe7aac | 1144 | /* |
c099397a | 1145 | * Stage 10 of the trace events. |
3afe7aac MD |
1146 | * |
1147 | * Register/unregister probes at module load/unload. | |
1148 | */ | |
1149 | ||
ba012e22 | 1150 | #include <probes/lttng-events-reset.h> /* Reset all macros within LTTNG_TRACEPOINT_EVENT */ |
3afe7aac MD |
1151 | |
1152 | #define TP_ID1(_token, _system) _token##_system | |
1153 | #define TP_ID(_token, _system) TP_ID1(_token, _system) | |
1154 | #define module_init_eval1(_token, _system) module_init(_token##_system) | |
1155 | #define module_init_eval(_token, _system) module_init_eval1(_token, _system) | |
1156 | #define module_exit_eval1(_token, _system) module_exit(_token##_system) | |
1157 | #define module_exit_eval(_token, _system) module_exit_eval1(_token, _system) | |
1158 | ||
2655f9ad | 1159 | #ifndef TP_MODULE_NOINIT |
3afe7aac MD |
1160 | static int TP_ID(__lttng_events_init__, TRACE_SYSTEM)(void) |
1161 | { | |
6d2a620c | 1162 | wrapper_vmalloc_sync_all(); |
a90917c3 | 1163 | return lttng_probe_register(&TP_ID(__probe_desc___, TRACE_SYSTEM)); |
3afe7aac MD |
1164 | } |
1165 | ||
3afe7aac MD |
1166 | static void TP_ID(__lttng_events_exit__, TRACE_SYSTEM)(void) |
1167 | { | |
a90917c3 | 1168 | lttng_probe_unregister(&TP_ID(__probe_desc___, TRACE_SYSTEM)); |
3afe7aac MD |
1169 | } |
1170 | ||
2655f9ad MD |
1171 | #ifndef TP_MODULE_NOAUTOLOAD |
1172 | module_init_eval(__lttng_events_init__, TRACE_SYSTEM); | |
3afe7aac | 1173 | module_exit_eval(__lttng_events_exit__, TRACE_SYSTEM); |
259b6cb3 | 1174 | #endif |
3afe7aac | 1175 | |
2655f9ad MD |
1176 | #endif |
1177 | ||
3afe7aac MD |
1178 | #undef module_init_eval |
1179 | #undef module_exit_eval | |
1180 | #undef TP_ID1 | |
1181 | #undef TP_ID | |
177b3692 MD |
1182 | |
1183 | #undef TP_PROTO | |
1184 | #undef TP_ARGS |