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[lttng-ust.git] / include / lttng / ust-tracepoint-event.h
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1/*
2 * SPDX-License-Identifier: MIT
3 *
4 * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
5 */
6
7#include <stdint.h>
8#include <stdio.h>
9#include <stdlib.h>
10#include <urcu/compiler.h>
11#include <urcu/rculist.h>
12#include <lttng/ust-events.h>
13#include <lttng/ust-ringbuffer-context.h>
14#include <lttng/ust-arch.h>
15#include <lttng/ust-compiler.h>
16#include <lttng/tracepoint.h>
17#include <lttng/ust-endian.h>
18#include <lttng/ust-api-compat.h>
19#include <string.h>
20#include <lttng/ust-api-compat.h>
21
22#if LTTNG_UST_COMPAT_API(0)
23#define TP_FIELDS LTTNG_UST_TP_FIELDS
24
25#define ctf_integer lttng_ust_field_integer
26#define ctf_integer_hex lttng_ust_field_integer_hex
27#define ctf_integer_network lttng_ust_field_integer_network
28#define ctf_integer_network_hex lttng_ust_field_integer_network_hex
29#define ctf_integer_nowrite lttng_ust_field_integer_nowrite
30
31#define ctf_float lttng_ust_field_float
32#define ctf_float_nowrite lttng_ust_field_float_nowrite
33
34#define ctf_array lttng_ust_field_array
35#define ctf_array_hex lttng_ust_field_array_hex
36#define ctf_array_network lttng_ust_field_array_network
37#define ctf_array_network_hex lttng_ust_field_array_network_hex
38#define ctf_array_text lttng_ust_field_array_text
39#define ctf_array_nowrite lttng_ust_field_array_nowrite
40#define ctf_array_nowrite_hex lttng_ust_field_array_nowrite_hex
41#define ctf_array_network_nowrite lttng_ust_field_array_network_nowrite
42#define ctf_array_network_nowrite_hex lttng_ust_field_array_network_nowrite_hex
43#define ctf_array_text_nowrite lttng_ust_field_array_text_nowrite
44
45#define ctf_sequence lttng_ust_field_sequence
46#define ctf_sequence_hex lttng_ust_field_sequence_hex
47#define ctf_sequence_network lttng_ust_field_sequence_network
48#define ctf_sequence_network_hex lttng_ust_field_sequence_network_hex
49#define ctf_sequence_text lttng_ust_field_sequence_text
50#define ctf_sequence_nowrite lttng_ust_field_sequence_nowrite
51#define ctf_sequence_nowrite_hex lttng_ust_field_sequence_nowrite_hex
52#define ctf_sequence_network_nowrite lttng_ust_field_sequence_network_nowrite
53#define ctf_sequence_network_nowrite_hex lttng_ust_field_sequence_network_nowrite_hex
54#define ctf_sequence_text_nowrite lttng_ust_field_sequence_text_nowrite
55
56#define ctf_string lttng_ust_field_string
57#define ctf_string_nowrite lttng_ust_field_string_nowrite
58
59#define ctf_unused lttng_ust_field_unused
60#define ctf_unused_nowrite lttng_ust_field_unused_nowrite
61
62#define ctf_enum lttng_ust_field_enum
63#define ctf_enum_nowrite lttng_ust_field_enum_nowrite
64#define ctf_enum_value lttng_ust_field_enum_value
65#define ctf_enum_range lttng_ust_field_enum_range
66#define ctf_enum_auto lttng_ust_field_enum_auto
67#endif /* #if LTTNG_UST_COMPAT_API(0) */
68
69#define LTTNG_UST__NULL_STRING "(null)"
70
71/*
72 * LTTNG_UST_TRACEPOINT_EVENT_CLASS declares a class of tracepoints receiving the
73 * same arguments and having the same field layout.
74 *
75 * LTTNG_UST_TRACEPOINT_EVENT_INSTANCE declares an instance of a tracepoint, with
76 * its own provider and name. It refers to a class (template).
77 *
78 * LTTNG_UST_TRACEPOINT_EVENT declared both a class and an instance and does a
79 * direct mapping from the instance to the class.
80 */
81
82#undef LTTNG_UST_TRACEPOINT_EVENT
83#define LTTNG_UST_TRACEPOINT_EVENT(_provider, _name, _args, _fields) \
84 LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, \
85 LTTNG_UST__TP_PARAMS(_args), \
86 LTTNG_UST__TP_PARAMS(_fields)) \
87 LTTNG_UST__TRACEPOINT_EVENT_INSTANCE(_provider, _name, _provider, _name, \
88 LTTNG_UST__TP_PARAMS(_args))
89
90#undef LTTNG_UST_TRACEPOINT_EVENT_CLASS
91#define LTTNG_UST_TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
92 LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, LTTNG_UST__TP_PARAMS(_args), LTTNG_UST__TP_PARAMS(_fields))
93
94#undef LTTNG_UST_TRACEPOINT_EVENT_INSTANCE
95#define LTTNG_UST_TRACEPOINT_EVENT_INSTANCE(_template_provider, _template_name, _provider, _name, _args) \
96 LTTNG_UST__TRACEPOINT_EVENT_INSTANCE(_template_provider, _template_name, _provider, _name, LTTNG_UST__TP_PARAMS(_args))
97
98/* Helpers */
99#define LTTNG_UST__TP_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
100
101#define lttng_ust__tp_max_t(type, x, y) \
102 ({ \
103 type lttng_ust__max1 = (x); \
104 type lttng_ust__max2 = (y); \
105 lttng_ust__max1 > lttng_ust__max2 ? lttng_ust__max1: lttng_ust__max2; \
106 })
107
108/*
109 * Stage 0 of tracepoint event generation.
110 *
111 * Check that each LTTNG_UST_TRACEPOINT_EVENT provider argument match the
112 * LTTNG_UST_TRACEPOINT_PROVIDER by creating dummy callbacks.
113 */
114
115/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
116#include <lttng/ust-tracepoint-event-reset.h>
117
118static inline
119void LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust_tracepoint_provider_mismatch_, LTTNG_UST_TRACEPOINT_PROVIDER)(void)
120 lttng_ust_notrace;
121static inline
122void LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust_tracepoint_provider_mismatch_, LTTNG_UST_TRACEPOINT_PROVIDER)(void)
123{
124}
125
126#undef LTTNG_UST__TRACEPOINT_EVENT_CLASS
127#define LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
128 lttng_ust_tracepoint_provider_mismatch_##_provider();
129
130#undef LTTNG_UST__TRACEPOINT_EVENT_INSTANCE
131#define LTTNG_UST__TRACEPOINT_EVENT_INSTANCE(_template_provider, _template_name, _provider, _name, _args) \
132 lttng_ust_tracepoint_provider_mismatch_##_provider();
133
134static inline
135void LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust_tracepoint_provider_check_, LTTNG_UST_TRACEPOINT_PROVIDER)(void)
136 lttng_ust_notrace;
137static inline
138void LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust_tracepoint_provider_check_, LTTNG_UST_TRACEPOINT_PROVIDER)(void)
139{
140#include LTTNG_UST_TRACEPOINT_INCLUDE
141}
142
143/*
144 * Stage 0.1 of tracepoint event generation.
145 *
146 * Check that each LTTNG_UST_TRACEPOINT_EVENT provider:name does not exceed the
147 * tracepoint name length limit.
148 */
149
150/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
151#include <lttng/ust-tracepoint-event-reset.h>
152
153#undef LTTNG_UST__TRACEPOINT_EVENT_INSTANCE
154#define LTTNG_UST__TRACEPOINT_EVENT_INSTANCE(_template_provider, _template_name, _provider, _name, _args) \
155 lttng_ust_tracepoint_validate_name_len(_provider, _name);
156
157#include LTTNG_UST_TRACEPOINT_INCLUDE
158
159/*
160 * Stage 0.2 of tracepoint event generation.
161 *
162 * Create dummy trace prototypes for each event class, and for each used
163 * template. This will allow checking whether the prototypes from the
164 * class and the instance using the class actually match.
165 */
166
167/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
168#include <lttng/ust-tracepoint-event-reset.h>
169
170#undef LTTNG_UST_TP_ARGS
171#define LTTNG_UST_TP_ARGS(...) __VA_ARGS__
172
173#undef LTTNG_UST__TRACEPOINT_EVENT_INSTANCE
174#define LTTNG_UST__TRACEPOINT_EVENT_INSTANCE(_template_provider, _template_name, _provider, _name, _args) \
175void lttng_ust__event_template_proto___##_template_provider##___##_template_name(LTTNG_UST__TP_ARGS_DATA_PROTO(_args));
176
177#undef LTTNG_UST__TRACEPOINT_EVENT_CLASS
178#define LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
179void lttng_ust__event_template_proto___##_provider##___##_name(LTTNG_UST__TP_ARGS_DATA_PROTO(_args));
180
181#include LTTNG_UST_TRACEPOINT_INCLUDE
182
183/*
184 * Stage 0.9 of tracepoint event generation
185 *
186 * Unfolding the enums
187 */
188#include <lttng/ust-tracepoint-event-reset.h>
189
190/* Enumeration entry (single value) */
191#undef lttng_ust_field_enum_value
192#define lttng_ust_field_enum_value(_string, _value) \
193 LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_enum_entry, { \
194 .struct_size = sizeof(struct lttng_ust_enum_entry), \
195 .start = { \
196 .value = lttng_ust_is_signed_type(__typeof__(_value)) ? \
197 (long long) (_value) : (_value), \
198 .signedness = lttng_ust_is_signed_type(__typeof__(_value)), \
199 }, \
200 .end = { \
201 .value = lttng_ust_is_signed_type(__typeof__(_value)) ? \
202 (long long) (_value) : (_value), \
203 .signedness = lttng_ust_is_signed_type(__typeof__(_value)), \
204 }, \
205 .string = (_string), \
206 }),
207
208/* Enumeration entry (range) */
209#undef lttng_ust_field_enum_range
210#define lttng_ust_field_enum_range(_string, _range_start, _range_end) \
211 LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_enum_entry, { \
212 .struct_size = sizeof(struct lttng_ust_enum_entry), \
213 .start = { \
214 .value = lttng_ust_is_signed_type(__typeof__(_range_start)) ? \
215 (long long) (_range_start) : (_range_start), \
216 .signedness = lttng_ust_is_signed_type(__typeof__(_range_start)), \
217 }, \
218 .end = { \
219 .value = lttng_ust_is_signed_type(__typeof__(_range_end)) ? \
220 (long long) (_range_end) : (_range_end), \
221 .signedness = lttng_ust_is_signed_type(__typeof__(_range_end)), \
222 }, \
223 .string = (_string), \
224 }),
225
226/* Enumeration entry (automatic value; follows the rules of CTF) */
227#undef lttng_ust_field_enum_auto
228#define lttng_ust_field_enum_auto(_string) \
229 LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_enum_entry, { \
230 .struct_size = sizeof(struct lttng_ust_enum_entry), \
231 .start = { \
232 .value = -1ULL, \
233 .signedness = 0, \
234 }, \
235 .end = { \
236 .value = -1ULL, \
237 .signedness = 0, \
238 }, \
239 .string = (_string), \
240 .options = LTTNG_UST_ENUM_ENTRY_OPTION_IS_AUTO, \
241 }),
242
243#undef LTTNG_UST_TP_ENUM_VALUES
244#define LTTNG_UST_TP_ENUM_VALUES(...) \
245 __VA_ARGS__
246
247#if LTTNG_UST_COMPAT_API(0)
248# undef TP_ENUM_VALUES
249# define TP_ENUM_VALUES LTTNG_UST_TP_ENUM_VALUES
250#endif /* #if LTTNG_UST_COMPAT_API(0) */
251
252#undef LTTNG_UST_TRACEPOINT_ENUM
253#define LTTNG_UST_TRACEPOINT_ENUM(_provider, _name, _values) \
254 const struct lttng_ust_enum_entry * const __enum_values__##_provider##_##_name[] = { \
255 _values \
256 lttng_ust_field_enum_value("", 0) /* Dummy, 0-len array forbidden by C99. */ \
257 };
258#include LTTNG_UST_TRACEPOINT_INCLUDE
259
260#if defined(__cplusplus)
261
262/*
263 * Stage 0.9.1
264 * Verifying array and sequence elements are of an integer or pointer
265 * type.
266 *
267 * This compile-time check is only enabled in C++, because the C
268 * implementation of lttng_ust_is_pointer_type does not support opaque
269 * pointer types.
270 */
271
272/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
273#include <lttng/ust-tracepoint-event-reset.h>
274#include <lttng/ust-tracepoint-event-write.h>
275#include <lttng/ust-tracepoint-event-nowrite.h>
276
277#undef lttng_ust__field_array_encoded
278#define lttng_ust__field_array_encoded(_type, _item, _src, _byte_order, \
279 _length, _encoding, _nowrite, \
280 _elem_type_base) \
281 lttng_ust_field_array_element_type_is_supported(_type, _item);
282
283#undef lttng_ust__field_sequence_encoded
284#define lttng_ust__field_sequence_encoded(_type, _item, _src, _byte_order, \
285 _length_type, _src_length, _encoding, _nowrite, \
286 _elem_type_base) \
287 lttng_ust_field_array_element_type_is_supported(_type, _item);
288
289#undef LTTNG_UST_TP_FIELDS
290#define LTTNG_UST_TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */
291
292#undef LTTNG_UST__TRACEPOINT_EVENT_CLASS
293#define LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
294 _fields
295
296#include LTTNG_UST_TRACEPOINT_INCLUDE
297
298#endif
299
300/*
301 * Stage 0.9.2 of tracepoint event generation.
302 *
303 * Create probe signature
304 */
305
306/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
307#include <lttng/ust-tracepoint-event-reset.h>
308
309#undef LTTNG_UST_TP_ARGS
310#define LTTNG_UST_TP_ARGS(...) __VA_ARGS__
311
312#define LTTNG_UST__TP_EXTRACT_STRING2(...) #__VA_ARGS__
313
314#undef LTTNG_UST__TRACEPOINT_EVENT_CLASS
315#define LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
316static const char __tp_event_signature___##_provider##___##_name[] = \
317 LTTNG_UST__TP_EXTRACT_STRING2(_args);
318
319#include LTTNG_UST_TRACEPOINT_INCLUDE
320
321#undef LTTNG_UST__TP_EXTRACT_STRING2
322
323/*
324 * Stage 1 of tracepoint event generation.
325 *
326 * Create probe callback prototypes.
327 */
328
329/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
330#include <lttng/ust-tracepoint-event-reset.h>
331
332#undef LTTNG_UST_TP_ARGS
333#define LTTNG_UST_TP_ARGS(...) __VA_ARGS__
334
335#undef LTTNG_UST__TRACEPOINT_EVENT_CLASS
336#define LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
337static void lttng_ust__event_probe__##_provider##___##_name(LTTNG_UST__TP_ARGS_DATA_PROTO(_args));
338
339#include LTTNG_UST_TRACEPOINT_INCLUDE
340
341/*
342 * Stage 1.1 of tracepoint event generation.
343 *
344 * Declare toplevel descriptor for the whole probe.
345 * Unlike C, C++ does not allow tentative definitions. Therefore, we
346 * need to explicitly declare the variable with "extern", using hidden
347 * visibility to keep this symbol from being exported to the global
348 * symbol table.
349 */
350
351extern const struct lttng_ust_probe_desc LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust__probe_desc___, LTTNG_UST_TRACEPOINT_PROVIDER)
352 __attribute__((visibility("hidden")));
353
354/*
355 * Stage 2 of tracepoint event generation.
356 *
357 * Create event field type metadata section.
358 * Each event produce an array of fields.
359 */
360
361/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
362#include <lttng/ust-tracepoint-event-reset.h>
363#include <lttng/ust-tracepoint-event-write.h>
364#include <lttng/ust-tracepoint-event-nowrite.h>
365
366#undef lttng_ust__field_integer_ext
367#define lttng_ust__field_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
368 LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, { \
369 .struct_size = sizeof(struct lttng_ust_event_field), \
370 .name = #_item, \
371 .type = lttng_ust_type_integer_define(_type, _byte_order, _base), \
372 .nowrite = _nowrite, \
373 .nofilter = 0, \
374 }),
375
376#undef lttng_ust__field_float
377#define lttng_ust__field_float(_type, _item, _src, _nowrite) \
378 LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, { \
379 .struct_size = sizeof(struct lttng_ust_event_field), \
380 .name = #_item, \
381 .type = lttng_ust_type_float_define(_type), \
382 .nowrite = _nowrite, \
383 .nofilter = 0, \
384 }),
385
386#undef lttng_ust__field_array_encoded
387#define lttng_ust__field_array_encoded(_type, _item, _src, _byte_order, \
388 _length, _encoding, _nowrite, \
389 _elem_type_base) \
390 LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, { \
391 .struct_size = sizeof(struct lttng_ust_event_field), \
392 .name = #_item, \
393 .type = (const struct lttng_ust_type_common *) LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_type_array, { \
394 .parent = { \
395 .type = lttng_ust_type_array, \
396 }, \
397 .struct_size = sizeof(struct lttng_ust_type_array), \
398 .elem_type = lttng_ust_type_integer_define(_type, _byte_order, _elem_type_base), \
399 .length = _length, \
400 .alignment = 0, \
401 .encoding = lttng_ust_string_encoding_##_encoding, \
402 }), \
403 .nowrite = _nowrite, \
404 .nofilter = 0, \
405 }),
406
407#undef lttng_ust__field_sequence_encoded
408#define lttng_ust__field_sequence_encoded(_type, _item, _src, _byte_order, \
409 _length_type, _src_length, _encoding, _nowrite, \
410 _elem_type_base) \
411 LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, { \
412 .struct_size = sizeof(struct lttng_ust_event_field), \
413 .name = "_" #_item "_length", \
414 .type = lttng_ust_type_integer_define(_length_type, LTTNG_UST_BYTE_ORDER, 10), \
415 .nowrite = _nowrite, \
416 .nofilter = 1, \
417 }), \
418 LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, { \
419 .struct_size = sizeof(struct lttng_ust_event_field), \
420 .name = #_item, \
421 .type = (const struct lttng_ust_type_common *) LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_type_sequence, { \
422 .parent = { \
423 .type = lttng_ust_type_sequence, \
424 }, \
425 .struct_size = sizeof(struct lttng_ust_type_sequence), \
426 .length_name = NULL, /* Use previous field. */ \
427 .elem_type = lttng_ust_type_integer_define(_type, _byte_order, _elem_type_base), \
428 .alignment = 0, \
429 .encoding = lttng_ust_string_encoding_##_encoding, \
430 }), \
431 .nowrite = _nowrite, \
432 .nofilter = 0, \
433 }),
434
435#undef lttng_ust__field_string
436#define lttng_ust__field_string(_item, _src, _nowrite) \
437 LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, { \
438 .struct_size = sizeof(struct lttng_ust_event_field), \
439 .name = #_item, \
440 .type = (const struct lttng_ust_type_common *) LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_type_string, { \
441 .parent = { \
442 .type = lttng_ust_type_string, \
443 }, \
444 .struct_size = sizeof(struct lttng_ust_type_string), \
445 .encoding = lttng_ust_string_encoding_UTF8, \
446 }), \
447 .nowrite = _nowrite, \
448 .nofilter = 0, \
449 }),
450
451#undef lttng_ust__field_unused
452#define lttng_ust__field_unused(_src)
453
454#undef lttng_ust__field_enum
455#define lttng_ust__field_enum(_provider, _name, _type, _item, _src, _nowrite) \
456 LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, { \
457 .struct_size = sizeof(struct lttng_ust_event_field), \
458 .name = #_item, \
459 .type = (const struct lttng_ust_type_common *) LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_type_enum, { \
460 .parent = { \
461 .type = lttng_ust_type_enum, \
462 }, \
463 .struct_size = sizeof(struct lttng_ust_type_enum), \
464 .desc = &__enum_##_provider##_##_name, \
465 .container_type = lttng_ust_type_integer_define(_type, LTTNG_UST_BYTE_ORDER, 10), \
466 }), \
467 .nowrite = _nowrite, \
468 .nofilter = 0, \
469 }),
470
471#undef LTTNG_UST_TP_FIELDS
472#define LTTNG_UST_TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */
473
474#undef LTTNG_UST__TRACEPOINT_EVENT_CLASS
475#define LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
476 static const struct lttng_ust_event_field * const lttng_ust__event_fields___##_provider##___##_name[] = { \
477 _fields \
478 lttng_ust_field_integer(int, dummy, 0) /* Dummy, C99 forbids 0-len array. */ \
479 }; \
480 static const struct lttng_ust_tracepoint_class lttng_ust__event_class___##_provider##___##_name = { \
481 .struct_size = sizeof(struct lttng_ust_tracepoint_class), \
482 .fields = lttng_ust__event_fields___##_provider##___##_name, \
483 .nr_fields = LTTNG_UST__TP_ARRAY_SIZE(lttng_ust__event_fields___##_provider##___##_name) - 1, \
484 .probe_callback = (void (*)(void)) &lttng_ust__event_probe__##_provider##___##_name, \
485 .signature = __tp_event_signature___##_provider##___##_name, \
486 .probe_desc = &lttng_ust__probe_desc___##_provider, \
487 };
488
489#undef LTTNG_UST_TRACEPOINT_ENUM
490#define LTTNG_UST_TRACEPOINT_ENUM(_provider, _name, _values) \
491 static const struct lttng_ust_enum_desc __enum_##_provider##_##_name = { \
492 .struct_size = sizeof(struct lttng_ust_enum_desc), \
493 .name = #_provider "_" #_name, \
494 .entries = __enum_values__##_provider##_##_name, \
495 .nr_entries = LTTNG_UST__TP_ARRAY_SIZE(__enum_values__##_provider##_##_name) - 1, \
496 .probe_desc = &lttng_ust__probe_desc___##_provider, \
497 };
498
499#include LTTNG_UST_TRACEPOINT_INCLUDE
500
501/*
502 * Stage 3.0 of tracepoint event generation.
503 *
504 * Create static inline function that calculates event size.
505 */
506
507/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
508#include <lttng/ust-tracepoint-event-reset.h>
509#include <lttng/ust-tracepoint-event-write.h>
510
511#undef lttng_ust__field_integer_ext
512#define lttng_ust__field_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
513 if (0) \
514 (void) (_src); /* Unused */ \
515 __event_len += lttng_ust_ring_buffer_align(__event_len, lttng_ust_rb_alignof(_type)); \
516 __event_len += sizeof(_type);
517
518#undef lttng_ust__field_float
519#define lttng_ust__field_float(_type, _item, _src, _nowrite) \
520 if (0) \
521 (void) (_src); /* Unused */ \
522 __event_len += lttng_ust_ring_buffer_align(__event_len, lttng_ust_rb_alignof(_type)); \
523 __event_len += sizeof(_type);
524
525#undef lttng_ust__field_array_encoded
526#define lttng_ust__field_array_encoded(_type, _item, _src, _byte_order, _length, _encoding, \
527 _nowrite, _elem_type_base) \
528 if (0) \
529 (void) (_src); /* Unused */ \
530 __event_len += lttng_ust_ring_buffer_align(__event_len, lttng_ust_rb_alignof(_type)); \
531 __event_len += sizeof(_type) * (_length);
532
533#undef lttng_ust__field_sequence_encoded
534#define lttng_ust__field_sequence_encoded(_type, _item, _src, _byte_order, _length_type, \
535 _src_length, _encoding, _nowrite, _elem_type_base) \
536 if (0) \
537 (void) (_src); /* Unused */ \
538 __event_len += lttng_ust_ring_buffer_align(__event_len, lttng_ust_rb_alignof(_length_type)); \
539 __event_len += sizeof(_length_type); \
540 __event_len += lttng_ust_ring_buffer_align(__event_len, lttng_ust_rb_alignof(_type)); \
541 __dynamic_len[__dynamic_len_idx] = (_src_length); \
542 __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \
543 __dynamic_len_idx++;
544
545#undef lttng_ust__field_string
546#define lttng_ust__field_string(_item, _src, _nowrite) \
547 __event_len += __dynamic_len[__dynamic_len_idx++] = \
548 strlen((_src) ? (_src) : LTTNG_UST__NULL_STRING) + 1;
549
550#undef lttng_ust__field_unused
551#define lttng_ust__field_unused(_src) \
552 if (0) \
553 (void) (_src); /* Unused */
554
555#undef lttng_ust__field_enum
556#define lttng_ust__field_enum(_provider, _name, _type, _item, _src, _nowrite) \
557 lttng_ust__field_integer_ext(_type, _item, _src, LTTNG_UST_BYTE_ORDER, 10, _nowrite)
558
559#undef LTTNG_UST_TP_ARGS
560#define LTTNG_UST_TP_ARGS(...) __VA_ARGS__
561
562#undef LTTNG_UST_TP_FIELDS
563#define LTTNG_UST_TP_FIELDS(...) __VA_ARGS__
564
565#undef LTTNG_UST__TRACEPOINT_EVENT_CLASS
566#define LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
567static inline \
568size_t lttng_ust__event_get_size__##_provider##___##_name(size_t *__dynamic_len, LTTNG_UST__TP_ARGS_DATA_PROTO(_args)) \
569 lttng_ust_notrace; \
570static inline \
571size_t lttng_ust__event_get_size__##_provider##___##_name( \
572 size_t *__dynamic_len __attribute__((__unused__)), \
573 LTTNG_UST__TP_ARGS_DATA_PROTO(_args)) \
574{ \
575 size_t __event_len = 0; \
576 unsigned int __dynamic_len_idx __attribute__((__unused__)) = 0; \
577 \
578 if (0) \
579 (void) __tp_data; /* don't warn if unused */ \
580 \
581 _fields \
582 return __event_len; \
583}
584
585#include LTTNG_UST_TRACEPOINT_INCLUDE
586
587/*
588 * Stage 3.1 of tracepoint event generation.
589 *
590 * Create static inline function that layout the filter stack data.
591 * We make both write and nowrite data available to the filter.
592 */
593
594/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
595#include <lttng/ust-tracepoint-event-reset.h>
596#include <lttng/ust-tracepoint-event-write.h>
597#include <lttng/ust-tracepoint-event-nowrite.h>
598
599#undef lttng_ust__field_integer_ext
600#define lttng_ust__field_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
601 if (lttng_ust_is_signed_type(_type)) { \
602 int64_t __ctf_tmp_int64; \
603 switch (sizeof(_type)) { \
604 case 1: \
605 { \
606 union { _type t; int8_t v; } __tmp = { (_type) (_src) }; \
607 __ctf_tmp_int64 = (int64_t) __tmp.v; \
608 break; \
609 } \
610 case 2: \
611 { \
612 union { _type t; int16_t v; } __tmp = { (_type) (_src) }; \
613 if (_byte_order != LTTNG_UST_BYTE_ORDER) \
614 __tmp.v = lttng_ust_bswap_16(__tmp.v); \
615 __ctf_tmp_int64 = (int64_t) __tmp.v; \
616 break; \
617 } \
618 case 4: \
619 { \
620 union { _type t; int32_t v; } __tmp = { (_type) (_src) }; \
621 if (_byte_order != LTTNG_UST_BYTE_ORDER) \
622 __tmp.v = lttng_ust_bswap_32(__tmp.v); \
623 __ctf_tmp_int64 = (int64_t) __tmp.v; \
624 break; \
625 } \
626 case 8: \
627 { \
628 union { _type t; int64_t v; } __tmp = { (_type) (_src) }; \
629 if (_byte_order != LTTNG_UST_BYTE_ORDER) \
630 __tmp.v = lttng_ust_bswap_64(__tmp.v); \
631 __ctf_tmp_int64 = (int64_t) __tmp.v; \
632 break; \
633 } \
634 default: \
635 abort(); \
636 }; \
637 memcpy(__stack_data, &__ctf_tmp_int64, sizeof(int64_t)); \
638 } else { \
639 uint64_t __ctf_tmp_uint64; \
640 switch (sizeof(_type)) { \
641 case 1: \
642 { \
643 union { _type t; uint8_t v; } __tmp = { (_type) (_src) }; \
644 __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
645 break; \
646 } \
647 case 2: \
648 { \
649 union { _type t; uint16_t v; } __tmp = { (_type) (_src) }; \
650 if (_byte_order != LTTNG_UST_BYTE_ORDER) \
651 __tmp.v = lttng_ust_bswap_16(__tmp.v); \
652 __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
653 break; \
654 } \
655 case 4: \
656 { \
657 union { _type t; uint32_t v; } __tmp = { (_type) (_src) }; \
658 if (_byte_order != LTTNG_UST_BYTE_ORDER) \
659 __tmp.v = lttng_ust_bswap_32(__tmp.v); \
660 __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
661 break; \
662 } \
663 case 8: \
664 { \
665 union { _type t; uint64_t v; } __tmp = { (_type) (_src) }; \
666 if (_byte_order != LTTNG_UST_BYTE_ORDER) \
667 __tmp.v = lttng_ust_bswap_64(__tmp.v); \
668 __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
669 break; \
670 } \
671 default: \
672 abort(); \
673 }; \
674 memcpy(__stack_data, &__ctf_tmp_uint64, sizeof(uint64_t)); \
675 } \
676 __stack_data += sizeof(int64_t);
677
678#undef lttng_ust__field_float
679#define lttng_ust__field_float(_type, _item, _src, _nowrite) \
680 { \
681 double __ctf_tmp_double = (double) (_type) (_src); \
682 memcpy(__stack_data, &__ctf_tmp_double, sizeof(double)); \
683 __stack_data += sizeof(double); \
684 }
685
686#undef lttng_ust__field_array_encoded
687#define lttng_ust__field_array_encoded(_type, _item, _src, _byte_order, _length, \
688 _encoding, _nowrite, _elem_type_base) \
689 { \
690 unsigned long __ctf_tmp_ulong = (unsigned long) (_length); \
691 const void *__ctf_tmp_ptr = (_src); \
692 memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \
693 __stack_data += sizeof(unsigned long); \
694 memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \
695 __stack_data += sizeof(void *); \
696 }
697
698#undef lttng_ust__field_sequence_encoded
699#define lttng_ust__field_sequence_encoded(_type, _item, _src, _byte_order, _length_type, \
700 _src_length, _encoding, _nowrite, _elem_type_base) \
701 { \
702 unsigned long __ctf_tmp_ulong = (unsigned long) (_src_length); \
703 const void *__ctf_tmp_ptr = (_src); \
704 memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \
705 __stack_data += sizeof(unsigned long); \
706 memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \
707 __stack_data += sizeof(void *); \
708 }
709
710#undef lttng_ust__field_string
711#define lttng_ust__field_string(_item, _src, _nowrite) \
712 { \
713 const void *__ctf_tmp_ptr = \
714 ((_src) ? (_src) : LTTNG_UST__NULL_STRING); \
715 memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \
716 __stack_data += sizeof(void *); \
717 }
718
719#undef lttng_ust__field_unused
720#define lttng_ust__field_unused(_src) \
721 if (0) \
722 (void) (_src);
723
724#undef lttng_ust__field_enum
725#define lttng_ust__field_enum(_provider, _name, _type, _item, _src, _nowrite) \
726 lttng_ust__field_integer_ext(_type, _item, _src, LTTNG_UST_BYTE_ORDER, 10, _nowrite)
727
728#undef LTTNG_UST_TP_ARGS
729#define LTTNG_UST_TP_ARGS(...) __VA_ARGS__
730
731#undef LTTNG_UST_TP_FIELDS
732#define LTTNG_UST_TP_FIELDS(...) __VA_ARGS__
733
734#undef LTTNG_UST__TRACEPOINT_EVENT_CLASS
735#define LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
736static inline \
737void lttng_ust__event_prepare_interpreter_stack__##_provider##___##_name(char *__stack_data,\
738 LTTNG_UST__TP_ARGS_DATA_PROTO(_args)) \
739{ \
740 if (0) { \
741 (void) __tp_data; /* don't warn if unused */ \
742 (void) __stack_data; /* don't warn if unused */ \
743 } \
744 \
745 _fields \
746}
747
748#include LTTNG_UST_TRACEPOINT_INCLUDE
749
750/*
751 * Stage 4 of tracepoint event generation.
752 *
753 * Create static inline function that calculates event payload alignment.
754 */
755
756/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
757#include <lttng/ust-tracepoint-event-reset.h>
758#include <lttng/ust-tracepoint-event-write.h>
759
760#undef lttng_ust__field_integer_ext
761#define lttng_ust__field_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
762 if (0) \
763 (void) (_src); /* Unused */ \
764 __event_align = lttng_ust__tp_max_t(size_t, __event_align, lttng_ust_rb_alignof(_type));
765
766#undef lttng_ust__field_float
767#define lttng_ust__field_float(_type, _item, _src, _nowrite) \
768 if (0) \
769 (void) (_src); /* Unused */ \
770 __event_align = lttng_ust__tp_max_t(size_t, __event_align, lttng_ust_rb_alignof(_type));
771
772#undef lttng_ust__field_array_encoded
773#define lttng_ust__field_array_encoded(_type, _item, _src, _byte_order, _length, \
774 _encoding, _nowrite, _elem_type_base) \
775 if (0) \
776 (void) (_src); /* Unused */ \
777 __event_align = lttng_ust__tp_max_t(size_t, __event_align, lttng_ust_rb_alignof(_type));
778
779#undef lttng_ust__field_sequence_encoded
780#define lttng_ust__field_sequence_encoded(_type, _item, _src, _byte_order, _length_type, \
781 _src_length, _encoding, _nowrite, _elem_type_base) \
782 if (0) \
783 (void) (_src); /* Unused */ \
784 if (0) \
785 (void) (_src_length); /* Unused */ \
786 __event_align = lttng_ust__tp_max_t(size_t, __event_align, lttng_ust_rb_alignof(_length_type)); \
787 __event_align = lttng_ust__tp_max_t(size_t, __event_align, lttng_ust_rb_alignof(_type));
788
789#undef lttng_ust__field_string
790#define lttng_ust__field_string(_item, _src, _nowrite) \
791 if (0) \
792 (void) (_src); /* Unused */
793
794#undef lttng_ust__field_unused
795#define lttng_ust__field_unused(_src) \
796 if (0) \
797 (void) (_src); /* Unused */
798
799#undef lttng_ust__field_enum
800#define lttng_ust__field_enum(_provider, _name, _type, _item, _src, _nowrite) \
801 lttng_ust__field_integer_ext(_type, _item, _src, LTTNG_UST_BYTE_ORDER, 10, _nowrite)
802
803#undef LTTNG_UST_TP_ARGS
804#define LTTNG_UST_TP_ARGS(...) __VA_ARGS__
805
806#undef LTTNG_UST_TP_FIELDS
807#define LTTNG_UST_TP_FIELDS(...) __VA_ARGS__
808
809#undef LTTNG_UST__TRACEPOINT_EVENT_CLASS
810#define LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
811static inline \
812size_t lttng_ust__event_get_align__##_provider##___##_name(LTTNG_UST__TP_ARGS_PROTO(_args)) \
813 lttng_ust_notrace; \
814static inline \
815size_t lttng_ust__event_get_align__##_provider##___##_name(LTTNG_UST__TP_ARGS_PROTO(_args)) \
816{ \
817 size_t __event_align = 1; \
818 _fields \
819 return __event_align; \
820}
821
822#include LTTNG_UST_TRACEPOINT_INCLUDE
823
824
825/*
826 * Stage 5 of tracepoint event generation.
827 *
828 * Create the probe function. This function calls event size calculation
829 * and writes event data into the buffer.
830 */
831
832/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
833#include <lttng/ust-tracepoint-event-reset.h>
834#include <lttng/ust-tracepoint-event-write.h>
835
836#undef lttng_ust__field_integer_ext
837#define lttng_ust__field_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
838 { \
839 _type __tmp = (_src); \
840 __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp), lttng_ust_rb_alignof(__tmp));\
841 }
842
843#undef lttng_ust__field_float
844#define lttng_ust__field_float(_type, _item, _src, _nowrite) \
845 { \
846 _type __tmp = (_src); \
847 __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp), lttng_ust_rb_alignof(__tmp));\
848 }
849
850#undef lttng_ust__field_array_encoded
851#define lttng_ust__field_array_encoded(_type, _item, _src, _byte_order, _length, \
852 _encoding, _nowrite, _elem_type_base) \
853 if (lttng_ust_string_encoding_##_encoding == lttng_ust_string_encoding_none) \
854 __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length), lttng_ust_rb_alignof(_type)); \
855 else \
856 __chan->ops->event_pstrcpy_pad(&__ctx, (const char *) (_src), _length); \
857
858#undef lttng_ust__field_sequence_encoded
859#define lttng_ust__field_sequence_encoded(_type, _item, _src, _byte_order, _length_type, \
860 _src_length, _encoding, _nowrite, _elem_type_base) \
861 { \
862 _length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx]; \
863 __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type), lttng_ust_rb_alignof(_length_type));\
864 } \
865 if (lttng_ust_string_encoding_##_encoding == lttng_ust_string_encoding_none) \
866 __chan->ops->event_write(&__ctx, _src, \
867 sizeof(_type) * lttng_ust__get_dynamic_len(dest), lttng_ust_rb_alignof(_type)); \
868 else \
869 __chan->ops->event_pstrcpy_pad(&__ctx, (const char *) (_src), lttng_ust__get_dynamic_len(dest)); \
870
871#undef lttng_ust__field_string
872#define lttng_ust__field_string(_item, _src, _nowrite) \
873 { \
874 const char *__ctf_tmp_string = \
875 ((_src) ? (_src) : LTTNG_UST__NULL_STRING); \
876 __chan->ops->event_strcpy(&__ctx, __ctf_tmp_string, \
877 lttng_ust__get_dynamic_len(dest)); \
878 }
879
880#undef lttng_ust__field_unused
881#define lttng_ust__field_unused(_src)
882
883#undef lttng_ust__field_enum
884#define lttng_ust__field_enum(_provider, _name, _type, _item, _src, _nowrite) \
885 lttng_ust__field_integer_ext(_type, _item, _src, LTTNG_UST_BYTE_ORDER, 10, _nowrite)
886
887/* Beware: this get len actually consumes the len value */
888#undef lttng_ust__get_dynamic_len
889#define lttng_ust__get_dynamic_len(field) __stackvar.__dynamic_len[__dynamic_len_idx++]
890
891#undef LTTNG_UST_TP_ARGS
892#define LTTNG_UST_TP_ARGS(...) __VA_ARGS__
893
894#undef LTTNG_UST_TP_FIELDS
895#define LTTNG_UST_TP_FIELDS(...) __VA_ARGS__
896
897/*
898 * For state dump, check that "session" argument (mandatory) matches the
899 * session this event belongs to. Ensures that we write state dump data only
900 * into the started session, not into all sessions.
901 */
902#undef LTTNG_UST__TP_SESSION_CHECK
903#ifdef LTTNG_UST_TP_SESSION_CHECK
904#define LTTNG_UST__TP_SESSION_CHECK(session, csession) (session == csession)
905#else /* TP_SESSION_CHECK */
906#define LTTNG_UST__TP_SESSION_CHECK(session, csession) 1
907#endif /* TP_SESSION_CHECK */
908
909/*
910 * Use of __builtin_return_address(0) sometimes seems to cause stack
911 * corruption on 32-bit PowerPC. Disable this feature on that
912 * architecture for now by always using the NULL value for the ip
913 * context.
914 */
915#undef LTTNG_UST__TP_IP_PARAM
916
917#ifdef LTTNG_UST_TP_IP_PARAM
918#define LTTNG_UST__TP_IP_PARAM(x) (x)
919#else /* TP_IP_PARAM */
920
921#if defined(LTTNG_UST_ARCH_PPC) && !defined(LTTNG_UST_ARCH_PPC64)
922#define LTTNG_UST__TP_IP_PARAM(x) NULL
923#else
924#define LTTNG_UST__TP_IP_PARAM(x) __builtin_return_address(0)
925#endif
926
927#endif /* TP_IP_PARAM */
928
929/*
930 * Using twice size for filter stack data to hold size and pointer for
931 * each field (worse case). For integers, max size required is 64-bit.
932 * Same for double-precision floats. Those fit within
933 * 2*sizeof(unsigned long) for all supported architectures.
934 * Perform UNION (||) of filter runtime list.
935 */
936#undef LTTNG_UST__TRACEPOINT_EVENT_CLASS
937#define LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
938static \
939void lttng_ust__event_probe__##_provider##___##_name(LTTNG_UST__TP_ARGS_DATA_PROTO(_args)) \
940 lttng_ust_notrace; \
941static \
942void lttng_ust__event_probe__##_provider##___##_name(LTTNG_UST__TP_ARGS_DATA_PROTO(_args)) \
943{ \
944 struct lttng_ust_event_common *__event = (struct lttng_ust_event_common *) __tp_data; \
945 size_t __dynamic_len_idx = 0; \
946 const size_t __num_fields = LTTNG_UST__TP_ARRAY_SIZE(lttng_ust__event_fields___##_provider##___##_name) - 1; \
947 struct lttng_ust_probe_ctx __probe_ctx; \
948 union { \
949 size_t __dynamic_len[__num_fields]; \
950 char __interpreter_stack_data[2 * sizeof(unsigned long) * __num_fields]; \
951 } __stackvar; \
952 int __ret; \
953 bool __interpreter_stack_prepared = false; \
954 \
955 if (0) \
956 (void) __dynamic_len_idx; /* don't warn if unused */ \
957 switch (__event->type) { \
958 case LTTNG_UST_EVENT_TYPE_RECORDER: \
959 { \
960 struct lttng_ust_event_recorder *__event_recorder = (struct lttng_ust_event_recorder *) __event->child; \
961 struct lttng_ust_channel_buffer *__chan = __event_recorder->chan; \
962 struct lttng_ust_channel_common *__chan_common = __chan->parent; \
963 \
964 if (!LTTNG_UST__TP_SESSION_CHECK(session, __chan_common->session)) \
965 return; \
966 if (caa_unlikely(!CMM_ACCESS_ONCE(__chan_common->session->active))) \
967 return; \
968 if (caa_unlikely(!CMM_ACCESS_ONCE(__chan_common->enabled))) \
969 return; \
970 break; \
971 } \
972 case LTTNG_UST_EVENT_TYPE_NOTIFIER: \
973 break; \
974 } \
975 if (caa_unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \
976 return; \
977 if (caa_unlikely(!LTTNG_UST_TP_RCU_LINK_TEST())) \
978 return; \
979 __probe_ctx.struct_size = sizeof(struct lttng_ust_probe_ctx); \
980 __probe_ctx.ip = LTTNG_UST__TP_IP_PARAM(LTTNG_UST_TP_IP_PARAM); \
981 if (caa_unlikely(CMM_ACCESS_ONCE(__event->eval_filter))) { \
982 lttng_ust__event_prepare_interpreter_stack__##_provider##___##_name(__stackvar.__interpreter_stack_data, \
983 LTTNG_UST__TP_ARGS_DATA_VAR(_args)); \
984 __interpreter_stack_prepared = true; \
985 if (caa_likely(__event->run_filter(__event, \
986 __stackvar.__interpreter_stack_data, &__probe_ctx, NULL) != LTTNG_UST_EVENT_FILTER_ACCEPT)) \
987 return; \
988 } \
989 switch (__event->type) { \
990 case LTTNG_UST_EVENT_TYPE_RECORDER: \
991 { \
992 size_t __event_len, __event_align; \
993 struct lttng_ust_event_recorder *__event_recorder = (struct lttng_ust_event_recorder *) __event->child; \
994 struct lttng_ust_channel_buffer *__chan = __event_recorder->chan; \
995 struct lttng_ust_ring_buffer_ctx __ctx; \
996 \
997 __event_len = lttng_ust__event_get_size__##_provider##___##_name(__stackvar.__dynamic_len, \
998 LTTNG_UST__TP_ARGS_DATA_VAR(_args)); \
999 __event_align = lttng_ust__event_get_align__##_provider##___##_name(LTTNG_UST__TP_ARGS_VAR(_args)); \
1000 lttng_ust_ring_buffer_ctx_init(&__ctx, __event_recorder, __event_len, __event_align, \
1001 &__probe_ctx); \
1002 __ret = __chan->ops->event_reserve(&__ctx); \
1003 if (__ret < 0) \
1004 return; \
1005 _fields \
1006 __chan->ops->event_commit(&__ctx); \
1007 break; \
1008 } \
1009 case LTTNG_UST_EVENT_TYPE_NOTIFIER: \
1010 { \
1011 struct lttng_ust_event_notifier *__event_notifier = (struct lttng_ust_event_notifier *) __event->child; \
1012 struct lttng_ust_notification_ctx __notif_ctx; \
1013 \
1014 __notif_ctx.struct_size = sizeof(struct lttng_ust_notification_ctx); \
1015 __notif_ctx.eval_capture = CMM_ACCESS_ONCE(__event_notifier->eval_capture); \
1016 \
1017 if (caa_unlikely(!__interpreter_stack_prepared && __notif_ctx.eval_capture)) \
1018 lttng_ust__event_prepare_interpreter_stack__##_provider##___##_name(__stackvar.__interpreter_stack_data, \
1019 LTTNG_UST__TP_ARGS_DATA_VAR(_args)); \
1020 \
1021 __event_notifier->notification_send(__event_notifier, \
1022 __stackvar.__interpreter_stack_data, \
1023 &__probe_ctx, \
1024 &__notif_ctx); \
1025 break; \
1026 } \
1027 } \
1028}
1029
1030#include LTTNG_UST_TRACEPOINT_INCLUDE
1031
1032#undef lttng_ust__get_dynamic_len
1033
1034/*
1035 * Stage 6 of tracepoint event generation.
1036 *
1037 * Tracepoint loglevel mapping definition generation. We generate a
1038 * symbol for each mapping for a provider/event to ensure at most a 1 to
1039 * 1 mapping between events and loglevels. If the symbol is repeated,
1040 * the compiler will complain.
1041 */
1042
1043/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
1044#include <lttng/ust-tracepoint-event-reset.h>
1045
1046/*
1047 * Declare _loglevel___##__provider##___##__name as non-static, with
1048 * hidden visibility for c++ handling of weakref. We do a weakref to the
1049 * symbol in a later stage, which requires that the symbol is not
1050 * mangled.
1051 */
1052#ifdef __cplusplus
1053#define LTTNG_UST_TP_EXTERN_C extern "C"
1054#else
1055#define LTTNG_UST_TP_EXTERN_C
1056#endif
1057
1058#undef LTTNG_UST_TRACEPOINT_LOGLEVEL
1059#define LTTNG_UST_TRACEPOINT_LOGLEVEL(__provider, __name, __loglevel) \
1060static const int _loglevel_value___##__provider##___##__name = __loglevel; \
1061LTTNG_UST_TP_EXTERN_C const int * const _loglevel___##__provider##___##__name \
1062 __attribute__((visibility("hidden"))) = \
1063 &_loglevel_value___##__provider##___##__name;
1064
1065#include LTTNG_UST_TRACEPOINT_INCLUDE
1066
1067#undef LTTNG_UST_TP_EXTERN_C
1068
1069/*
1070 * Stage 6.1 of tracepoint event generation.
1071 *
1072 * Tracepoint UML URI info.
1073 */
1074
1075/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
1076#include <lttng/ust-tracepoint-event-reset.h>
1077
1078/*
1079 * Declare _model_emf_uri___##__provider##___##__name as non-static,
1080 * with hidden visibility for c++ handling of weakref. We do a weakref
1081 * to the symbol in a later stage, which requires that the symbol is not
1082 * mangled.
1083 */
1084#ifdef __cplusplus
1085#define LTTNG_UST_TP_EXTERN_C extern "C"
1086#else
1087#define LTTNG_UST_TP_EXTERN_C
1088#endif
1089
1090#undef LTTNG_UST_TRACEPOINT_MODEL_EMF_URI
1091#define LTTNG_UST_TRACEPOINT_MODEL_EMF_URI(__provider, __name, __uri) \
1092LTTNG_UST_TP_EXTERN_C const char * const _model_emf_uri___##__provider##___##__name \
1093 __attribute__((visibility("hidden"))) = __uri; \
1094
1095#include LTTNG_UST_TRACEPOINT_INCLUDE
1096
1097#undef LTTNG_UST_TP_EXTERN_C
1098
1099/*
1100 * Stage 7.0 of tracepoint event generation.
1101 *
1102 * Create events description structures. We use a weakref because
1103 * loglevels are optional. If not declared, the event will point to
1104 * a loglevel that contains NULL.
1105 *
1106 * C++ requires that const objects have a user-declared default
1107 * constructor. However, in both C++ and C, weakref cannot be
1108 * initialized because it causes the weakref attribute to be ignored.
1109 * Therefore, the loglevel and model_emf_uri pointers are not const
1110 * to ensure C++ compilers default-initialize them.
1111 */
1112
1113/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
1114#include <lttng/ust-tracepoint-event-reset.h>
1115
1116#undef LTTNG_UST__TRACEPOINT_EVENT_INSTANCE
1117#define LTTNG_UST__TRACEPOINT_EVENT_INSTANCE(_template_provider, _template_name, _provider, _name, _args) \
1118static const int * \
1119 __ref_loglevel___##_provider##___##_name \
1120 __attribute__((weakref ("_loglevel___" #_provider "___" #_name))); \
1121static const char * \
1122 __ref_model_emf_uri___##_provider##___##_name \
1123 __attribute__((weakref ("_model_emf_uri___" #_provider "___" #_name)));\
1124static const struct lttng_ust_event_desc lttng_ust__event_desc___##_provider##_##_name = { \
1125 .struct_size = sizeof(struct lttng_ust_event_desc), \
1126 .event_name = #_name, \
1127 .probe_desc = &lttng_ust__probe_desc___##_provider, \
1128 .tp_class = &lttng_ust__event_class___##_template_provider##___##_template_name, \
1129 .loglevel = &__ref_loglevel___##_provider##___##_name, \
1130 .model_emf_uri = &__ref_model_emf_uri___##_provider##___##_name, \
1131};
1132
1133#include LTTNG_UST_TRACEPOINT_INCLUDE
1134
1135/*
1136 * Stage 7.1 of tracepoint event generation.
1137 *
1138 * Create array of events.
1139 */
1140
1141/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
1142#include <lttng/ust-tracepoint-event-reset.h>
1143
1144#undef LTTNG_UST__TRACEPOINT_EVENT_INSTANCE
1145#define LTTNG_UST__TRACEPOINT_EVENT_INSTANCE(_template_provider, _template_name, _provider, _name, _args) \
1146 &lttng_ust__event_desc___##_provider##_##_name,
1147
1148static const struct lttng_ust_event_desc * const LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust__provider_event_desc___, LTTNG_UST_TRACEPOINT_PROVIDER)[] = {
1149#include LTTNG_UST_TRACEPOINT_INCLUDE
1150 NULL, /* Dummy, C99 forbids 0-len array. */
1151};
1152
1153
1154/*
1155 * Stage 8 of tracepoint event generation.
1156 *
1157 * Create a toplevel descriptor for the whole probe.
1158 */
1159
1160const struct lttng_ust_probe_desc LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust__probe_desc___, LTTNG_UST_TRACEPOINT_PROVIDER) = {
1161 .struct_size = sizeof(struct lttng_ust_probe_desc),
1162 .provider_name = lttng_ust__tp_stringify(LTTNG_UST_TRACEPOINT_PROVIDER),
1163 .event_desc = LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust__provider_event_desc___, LTTNG_UST_TRACEPOINT_PROVIDER),
1164 .nr_events = LTTNG_UST__TP_ARRAY_SIZE(LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust__provider_event_desc___, LTTNG_UST_TRACEPOINT_PROVIDER)) - 1,
1165 .major = LTTNG_UST_PROVIDER_MAJOR,
1166 .minor = LTTNG_UST_PROVIDER_MINOR,
1167};
1168
1169static int LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust__probe_register_refcount___, LTTNG_UST_TRACEPOINT_PROVIDER);
1170static struct lttng_ust_registered_probe *LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust__probe_register_cookie___, LTTNG_UST_TRACEPOINT_PROVIDER);
1171
1172/*
1173 * Stage 9 of tracepoint event generation.
1174 *
1175 * Register/unregister probes at module load/unload.
1176 *
1177 * Generate the constructor as an externally visible symbol for use when
1178 * linking the probe statically.
1179 *
1180 * Register refcount is protected by libc dynamic loader mutex.
1181 *
1182 * Note that when building this code as C++, the definition of constructors
1183 * and destructors invoking the registration and unregistration functions
1184 * must be performed _after_ the initialization of the probes.
1185 *
1186 * This is because we rely on the order of initialization of static variables
1187 * and anonymous namespaces (their order of declaration) to ensure probes are
1188 * fully initialized, see
1189 * https://en.cppreference.com/w/cpp/language/initialization. This is especially
1190 * important when LTTNG_UST_ALLOCATE_COMPOUND_LITERAL_ON_HEAP is defined as
1191 * compound literals are then dynamically initialized.
1192 */
1193
1194/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
1195#include <lttng/ust-tracepoint-event-reset.h>
1196
1197static void
1198LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust__events_init__, LTTNG_UST_TRACEPOINT_PROVIDER)(void) lttng_ust_notrace;
1199static void
1200LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust__events_init__, LTTNG_UST_TRACEPOINT_PROVIDER)(void)
1201{
1202 struct lttng_ust_registered_probe *reg_probe;
1203
1204 if (LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust__probe_register_refcount___,
1205 LTTNG_UST_TRACEPOINT_PROVIDER)++) {
1206 return;
1207 }
1208 /*
1209 * lttng_ust_tracepoint_provider_check_ ## LTTNG_UST_TRACEPOINT_PROVIDER() is a
1210 * static inline function that ensures every probe PROVIDER
1211 * argument match the provider within which they appear. It
1212 * calls empty static inline functions, and therefore has no
1213 * runtime effect. However, if it detects an error, a linker
1214 * error will appear.
1215 */
1216 LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust_tracepoint_provider_check_, LTTNG_UST_TRACEPOINT_PROVIDER)();
1217 assert(!LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust__probe_register_cookie___, LTTNG_UST_TRACEPOINT_PROVIDER));
1218 reg_probe = lttng_ust_probe_register(&LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust__probe_desc___, LTTNG_UST_TRACEPOINT_PROVIDER));
1219 if (!reg_probe) {
1220 fprintf(stderr, "LTTng-UST: Error while registering tracepoint probe.\n");
1221 abort();
1222 }
1223 LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust__probe_register_cookie___, LTTNG_UST_TRACEPOINT_PROVIDER) = reg_probe;
1224}
1225
1226static void
1227LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust__events_exit__, LTTNG_UST_TRACEPOINT_PROVIDER)(void) lttng_ust_notrace;
1228static void
1229LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust__events_exit__, LTTNG_UST_TRACEPOINT_PROVIDER)(void)
1230{
1231 if (--LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust__probe_register_refcount___,
1232 LTTNG_UST_TRACEPOINT_PROVIDER)) {
1233 return;
1234 }
1235 lttng_ust_probe_unregister(LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust__probe_register_cookie___, LTTNG_UST_TRACEPOINT_PROVIDER));
1236 LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust__probe_register_cookie___, LTTNG_UST_TRACEPOINT_PROVIDER) = NULL;
1237}
1238
1239LTTNG_UST_DECLARE_CONSTRUCTOR_DESTRUCTOR(
1240 LTTNG_UST_TRACEPOINT_PROVIDER,
1241 LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust__events_init__, LTTNG_UST_TRACEPOINT_PROVIDER),
1242 LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust__events_exit__, LTTNG_UST_TRACEPOINT_PROVIDER),
1243 lttng_ust_notrace)
1244
1245/*
1246 * LTTNG_UST_TRACEPOINT_PROVIDER_HIDDEN_DEFINITION: Define this before
1247 * including a tracepoint instrumentation header to hide symbols
1248 * associated with the tracepoint provider. This is useful if the
1249 * tracepoint definition (including the header after defining
1250 * LTTNG_UST_TRACEPOINT_DEFINE) is in the same module as the provider
1251 * (including the header after defining
1252 * LTTNG_UST_TRACEPOINT_CREATE_PROBES).
1253 */
1254#undef LTTNG_UST__TRACEPOINT_PROVIDER_DEFINITION_VISIBILITY
1255#ifdef LTTNG_UST_TRACEPOINT_PROVIDER_HIDDEN_DEFINITION
1256#define LTTNG_UST__TRACEPOINT_PROVIDER_DEFINITION_VISIBILITY __attribute__((visibility("hidden")))
1257#else
1258#define LTTNG_UST__TRACEPOINT_PROVIDER_DEFINITION_VISIBILITY __attribute__((visibility("default")))
1259#endif
1260
1261int LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust_tracepoint_provider_, LTTNG_UST_TRACEPOINT_PROVIDER)
1262 LTTNG_UST__TRACEPOINT_PROVIDER_DEFINITION_VISIBILITY;
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