2 * Copyright (C) 2010-2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
4 * SPDX-License-Identifier: GPL-2.0-only
18 #include <common/common.hpp>
19 #include <common/exception.hpp>
20 #include <common/time.hpp>
21 #include <common/uuid.hpp>
23 #include "ust-app.hpp"
24 #include "ust-clock.hpp"
25 #include "ust-registry.hpp"
28 int _lttng_field_statedump(ust_registry_session
*session
,
29 const struct lttng_ust_ctl_field
*fields
, size_t nr_fields
,
30 size_t *iter_field
, size_t nesting
);
33 int get_count_order(unsigned int count
)
37 order
= lttng_fls(count
) - 1;
38 if (count
& (count
- 1)) {
41 LTTNG_ASSERT(order
>= 0);
46 * Returns offset where to write in metadata array, or negative error value on error.
49 ssize_t
metadata_reserve(ust_registry_session
*session
, size_t len
)
51 size_t new_len
= session
->_metadata_len
+ len
;
52 size_t new_alloc_len
= new_len
;
53 size_t old_alloc_len
= session
->_metadata_alloc_len
;
56 if (new_alloc_len
> (UINT32_MAX
>> 1))
58 if ((old_alloc_len
<< 1) > (UINT32_MAX
>> 1))
61 if (new_alloc_len
> old_alloc_len
) {
65 std::max
<size_t>(1U << get_count_order(new_alloc_len
), old_alloc_len
<< 1);
66 newptr
= (char *) realloc(session
->_metadata
, new_alloc_len
);
69 session
->_metadata
= newptr
;
70 /* We zero directly the memory from start of allocation. */
71 memset(&session
->_metadata
[old_alloc_len
], 0, new_alloc_len
- old_alloc_len
);
72 session
->_metadata_alloc_len
= new_alloc_len
;
74 ret
= session
->_metadata_len
;
75 session
->_metadata_len
+= len
;
80 int metadata_file_append(ust_registry_session
*session
,
81 const char *str
, size_t len
)
85 if (session
->_metadata_fd
< 0) {
88 /* Write to metadata file */
89 written
= lttng_write(session
->_metadata_fd
, str
, len
);
97 * We have exclusive access to our metadata buffer (protected by the
98 * ust_lock), so we can do racy operations such as looking for
99 * remaining space left in packet and write, since mutual exclusion
100 * protects us from concurrent writes.
102 static ATTR_FORMAT_PRINTF(2, 3)
103 int lttng_metadata_printf(ust_registry_session
*session
,
104 const char *fmt
, ...)
113 ret
= vasprintf(&str
, fmt
, ap
);
119 offset
= metadata_reserve(session
, len
);
124 memcpy(&session
->_metadata
[offset
], str
, len
);
125 ret
= metadata_file_append(session
, str
, len
);
127 PERROR("Error appending to metadata file");
130 DBG3("Append to metadata: \"%s\"", str
);
139 int print_tabs(ust_registry_session
*session
, size_t nesting
)
143 for (i
= 0; i
< nesting
; i
++) {
146 ret
= lttng_metadata_printf(session
, " ");
155 void sanitize_ctf_identifier(char *out
, const char *in
)
159 for (i
= 0; i
< LTTNG_UST_ABI_SYM_NAME_LEN
; i
++) {
173 int print_escaped_ctf_string(ust_registry_session
*session
, const char *string
)
181 while (cur
!= '\0') {
184 ret
= lttng_metadata_printf(session
, "%s", "\\n");
188 ret
= lttng_metadata_printf(session
, "%c", '\\');
192 /* We still print the current char */
195 ret
= lttng_metadata_printf(session
, "%c", cur
);
209 /* Called with session registry mutex held. */
211 int ust_metadata_enum_statedump(ust_registry_session
*session
,
212 const char *enum_name
,
214 const struct lttng_ust_ctl_integer_type
*container_type
,
215 const char *field_name
, size_t *iter_field
, size_t nesting
)
217 struct ust_registry_enum
*reg_enum
;
218 const struct lttng_ust_ctl_enum_entry
*entries
;
222 char identifier
[LTTNG_UST_ABI_SYM_NAME_LEN
];
225 reg_enum
= ust_registry_lookup_enum_by_id(session
, enum_name
, enum_id
);
227 /* reg_enum can still be used because session registry mutex is held. */
232 entries
= reg_enum
->entries
;
233 nr_entries
= reg_enum
->nr_entries
;
235 ret
= print_tabs(session
, nesting
);
239 ret
= lttng_metadata_printf(session
,
240 "enum : integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u; } {\n",
241 container_type
->size
,
242 container_type
->alignment
,
243 container_type
->signedness
,
244 (container_type
->encoding
== lttng_ust_ctl_encode_none
)
246 : (container_type
->encoding
== lttng_ust_ctl_encode_UTF8
)
249 container_type
->base
);
254 /* Dump all entries */
255 for (i
= 0; i
< nr_entries
; i
++) {
256 const struct lttng_ust_ctl_enum_entry
*entry
= &entries
[i
];
259 ret
= print_tabs(session
, nesting
);
263 ret
= lttng_metadata_printf(session
,
268 len
= strlen(entry
->string
);
269 /* Escape the character '"' */
270 for (j
= 0; j
< len
; j
++) {
271 char c
= entry
->string
[j
];
275 ret
= lttng_metadata_printf(session
,
279 ret
= lttng_metadata_printf(session
,
283 ret
= lttng_metadata_printf(session
,
291 ret
= lttng_metadata_printf(session
, "\"");
296 if (entry
->u
.extra
.options
&
297 LTTNG_UST_CTL_UST_ENUM_ENTRY_OPTION_IS_AUTO
) {
298 ret
= lttng_metadata_printf(session
, ",\n");
303 ret
= lttng_metadata_printf(session
,
309 if (entry
->start
.signedness
) {
310 ret
= lttng_metadata_printf(session
,
311 "%" PRId64
, entry
->start
.value
);
313 ret
= lttng_metadata_printf(session
,
314 "%" PRIu64
, entry
->start
.value
);
320 if (entry
->start
.signedness
== entry
->end
.signedness
&&
321 entry
->start
.value
==
323 ret
= lttng_metadata_printf(session
, ",\n");
325 if (entry
->end
.signedness
) {
326 ret
= lttng_metadata_printf(session
,
327 " ... %" PRId64
",\n",
330 ret
= lttng_metadata_printf(session
,
331 " ... %" PRIu64
",\n",
341 sanitize_ctf_identifier(identifier
, field_name
);
342 ret
= print_tabs(session
, nesting
);
346 ret
= lttng_metadata_printf(session
, "} _%s;\n",
354 int _lttng_variant_statedump(ust_registry_session
*session
,
355 uint32_t nr_choices
, const char *tag_name
,
357 const struct lttng_ust_ctl_field
*fields
, size_t nr_fields
,
358 size_t *iter_field
, size_t nesting
)
360 const struct lttng_ust_ctl_field
*variant
= &fields
[*iter_field
];
363 char identifier
[LTTNG_UST_ABI_SYM_NAME_LEN
];
366 sanitize_ctf_identifier(identifier
, tag_name
);
368 ret
= print_tabs(session
, nesting
);
372 ret
= lttng_metadata_printf(session
,
373 "struct { } align(%u) _%s_padding;\n",
374 alignment
* CHAR_BIT
,
380 ret
= print_tabs(session
, nesting
);
384 ret
= lttng_metadata_printf(session
,
391 for (i
= 0; i
< nr_choices
; i
++) {
392 if (*iter_field
>= nr_fields
) {
396 ret
= _lttng_field_statedump(session
,
398 iter_field
, nesting
+ 1);
403 sanitize_ctf_identifier(identifier
, variant
->name
);
404 ret
= print_tabs(session
, nesting
);
408 ret
= lttng_metadata_printf(session
,
419 int _lttng_field_statedump(ust_registry_session
*session
,
420 const struct lttng_ust_ctl_field
*fields
, size_t nr_fields
,
421 size_t *iter_field
, size_t nesting
)
424 const char *bo_be
= " byte_order = be;";
425 const char *bo_le
= " byte_order = le;";
426 const char *bo_native
= "";
427 const char *bo_reverse
;
428 const struct lttng_ust_ctl_field
*field
;
430 if (*iter_field
>= nr_fields
) {
434 field
= &fields
[*iter_field
];
436 if (session
->_byte_order
== BIG_ENDIAN
) {
442 switch (field
->type
.atype
) {
443 case lttng_ust_ctl_atype_integer
:
444 ret
= print_tabs(session
, nesting
);
448 ret
= lttng_metadata_printf(session
,
449 "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s;\n",
450 field
->type
.u
.integer
.size
,
451 field
->type
.u
.integer
.alignment
,
452 field
->type
.u
.integer
.signedness
,
453 (field
->type
.u
.integer
.encoding
== lttng_ust_ctl_encode_none
)
455 : (field
->type
.u
.integer
.encoding
== lttng_ust_ctl_encode_UTF8
)
458 field
->type
.u
.integer
.base
,
459 field
->type
.u
.integer
.reverse_byte_order
? bo_reverse
: bo_native
,
463 case lttng_ust_ctl_atype_enum
:
464 ret
= ust_metadata_enum_statedump(session
,
465 field
->type
.u
.legacy
.basic
.enumeration
.name
,
466 field
->type
.u
.legacy
.basic
.enumeration
.id
,
467 &field
->type
.u
.legacy
.basic
.enumeration
.container_type
,
468 field
->name
, iter_field
, nesting
);
470 case lttng_ust_ctl_atype_float
:
471 ret
= print_tabs(session
, nesting
);
475 ret
= lttng_metadata_printf(session
,
476 "floating_point { exp_dig = %u; mant_dig = %u; align = %u;%s } _%s;\n",
477 field
->type
.u
._float
.exp_dig
,
478 field
->type
.u
._float
.mant_dig
,
479 field
->type
.u
._float
.alignment
,
480 field
->type
.u
._float
.reverse_byte_order
? bo_reverse
: bo_native
,
484 case lttng_ust_ctl_atype_array
:
486 const struct lttng_ust_ctl_basic_type
*elem_type
;
488 ret
= print_tabs(session
, nesting
);
492 elem_type
= &field
->type
.u
.legacy
.array
.elem_type
;
493 /* Only integers are currently supported in arrays. */
494 if (elem_type
->atype
!= lttng_ust_ctl_atype_integer
) {
498 ret
= lttng_metadata_printf(session
,
499 "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[%u];\n",
500 elem_type
->u
.basic
.integer
.size
,
501 elem_type
->u
.basic
.integer
.alignment
,
502 elem_type
->u
.basic
.integer
.signedness
,
503 (elem_type
->u
.basic
.integer
.encoding
== lttng_ust_ctl_encode_none
)
505 : (elem_type
->u
.basic
.integer
.encoding
== lttng_ust_ctl_encode_UTF8
)
508 elem_type
->u
.basic
.integer
.base
,
509 elem_type
->u
.basic
.integer
.reverse_byte_order
? bo_reverse
: bo_native
,
510 field
->name
, field
->type
.u
.legacy
.array
.length
);
514 case lttng_ust_ctl_atype_array_nestable
:
516 uint32_t array_length
;
517 const struct lttng_ust_ctl_field
*array_nestable
;
518 const struct lttng_ust_ctl_type
*elem_type
;
520 array_length
= field
->type
.u
.array_nestable
.length
;
523 if (*iter_field
>= nr_fields
) {
527 array_nestable
= &fields
[*iter_field
];
528 elem_type
= &array_nestable
->type
;
530 /* Only integers are currently supported in arrays. */
531 if (elem_type
->atype
!= lttng_ust_ctl_atype_integer
) {
536 if (field
->type
.u
.array_nestable
.alignment
) {
537 ret
= print_tabs(session
, nesting
);
541 ret
= lttng_metadata_printf(session
,
542 "struct { } align(%u) _%s_padding;\n",
543 field
->type
.u
.array_nestable
.alignment
* CHAR_BIT
,
550 ret
= print_tabs(session
, nesting
);
554 ret
= lttng_metadata_printf(session
,
555 "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[%u];\n",
556 elem_type
->u
.integer
.size
,
557 elem_type
->u
.integer
.alignment
,
558 elem_type
->u
.integer
.signedness
,
559 (elem_type
->u
.integer
.encoding
== lttng_ust_ctl_encode_none
)
561 : (elem_type
->u
.integer
.encoding
== lttng_ust_ctl_encode_UTF8
)
564 elem_type
->u
.integer
.base
,
565 elem_type
->u
.integer
.reverse_byte_order
? bo_reverse
: bo_native
,
566 field
->name
, array_length
);
570 case lttng_ust_ctl_atype_sequence
:
572 const struct lttng_ust_ctl_basic_type
*elem_type
;
573 const struct lttng_ust_ctl_basic_type
*length_type
;
575 elem_type
= &field
->type
.u
.legacy
.sequence
.elem_type
;
576 length_type
= &field
->type
.u
.legacy
.sequence
.length_type
;
577 ret
= print_tabs(session
, nesting
);
582 /* Only integers are currently supported in sequences. */
583 if (elem_type
->atype
!= lttng_ust_ctl_atype_integer
) {
588 ret
= lttng_metadata_printf(session
,
589 "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } __%s_length;\n",
590 length_type
->u
.basic
.integer
.size
,
591 (unsigned int) length_type
->u
.basic
.integer
.alignment
,
592 length_type
->u
.basic
.integer
.signedness
,
593 (length_type
->u
.basic
.integer
.encoding
== lttng_ust_ctl_encode_none
)
595 : ((length_type
->u
.basic
.integer
.encoding
== lttng_ust_ctl_encode_UTF8
)
598 length_type
->u
.basic
.integer
.base
,
599 length_type
->u
.basic
.integer
.reverse_byte_order
? bo_reverse
: bo_native
,
605 ret
= print_tabs(session
, nesting
);
609 ret
= lttng_metadata_printf(session
,
610 "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[ __%s_length ];\n",
611 elem_type
->u
.basic
.integer
.size
,
612 (unsigned int) elem_type
->u
.basic
.integer
.alignment
,
613 elem_type
->u
.basic
.integer
.signedness
,
614 (elem_type
->u
.basic
.integer
.encoding
== lttng_ust_ctl_encode_none
)
616 : ((elem_type
->u
.basic
.integer
.encoding
== lttng_ust_ctl_encode_UTF8
)
619 elem_type
->u
.basic
.integer
.base
,
620 elem_type
->u
.basic
.integer
.reverse_byte_order
? bo_reverse
: bo_native
,
626 case lttng_ust_ctl_atype_sequence_nestable
:
628 const struct lttng_ust_ctl_field
*sequence_nestable
;
629 const struct lttng_ust_ctl_type
*elem_type
;
632 if (*iter_field
>= nr_fields
) {
636 sequence_nestable
= &fields
[*iter_field
];
637 elem_type
= &sequence_nestable
->type
;
639 /* Only integers are currently supported in sequences. */
640 if (elem_type
->atype
!= lttng_ust_ctl_atype_integer
) {
645 if (field
->type
.u
.sequence_nestable
.alignment
) {
646 ret
= print_tabs(session
, nesting
);
650 ret
= lttng_metadata_printf(session
,
651 "struct { } align(%u) _%s_padding;\n",
652 field
->type
.u
.sequence_nestable
.alignment
* CHAR_BIT
,
659 ret
= print_tabs(session
, nesting
);
663 ret
= lttng_metadata_printf(session
,
664 "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[ _%s ];\n",
665 elem_type
->u
.integer
.size
,
666 (unsigned int) elem_type
->u
.integer
.alignment
,
667 elem_type
->u
.integer
.signedness
,
668 (elem_type
->u
.integer
.encoding
== lttng_ust_ctl_encode_none
)
670 : ((elem_type
->u
.integer
.encoding
== lttng_ust_ctl_encode_UTF8
)
673 elem_type
->u
.integer
.base
,
674 elem_type
->u
.integer
.reverse_byte_order
? bo_reverse
: bo_native
,
676 field
->type
.u
.sequence_nestable
.length_name
);
680 case lttng_ust_ctl_atype_string
:
681 /* Default encoding is UTF8 */
682 ret
= print_tabs(session
, nesting
);
686 ret
= lttng_metadata_printf(session
,
688 field
->type
.u
.string
.encoding
== lttng_ust_ctl_encode_ASCII
?
689 " { encoding = ASCII; }" : "",
693 case lttng_ust_ctl_atype_variant
:
694 ret
= _lttng_variant_statedump(session
,
695 field
->type
.u
.legacy
.variant
.nr_choices
,
696 field
->type
.u
.legacy
.variant
.tag_name
,
698 fields
, nr_fields
, iter_field
, nesting
);
703 case lttng_ust_ctl_atype_variant_nestable
:
704 ret
= _lttng_variant_statedump(session
,
705 field
->type
.u
.variant_nestable
.nr_choices
,
706 field
->type
.u
.variant_nestable
.tag_name
,
707 field
->type
.u
.variant_nestable
.alignment
,
708 fields
, nr_fields
, iter_field
, nesting
);
713 case lttng_ust_ctl_atype_struct
:
714 if (field
->type
.u
.legacy
._struct
.nr_fields
!= 0) {
715 /* Currently only 0-length structures are supported. */
719 ret
= print_tabs(session
, nesting
);
723 ret
= lttng_metadata_printf(session
,
728 case lttng_ust_ctl_atype_struct_nestable
:
729 if (field
->type
.u
.struct_nestable
.nr_fields
!= 0) {
730 /* Currently only 0-length structures are supported. */
734 ret
= print_tabs(session
, nesting
);
738 if (field
->type
.u
.struct_nestable
.alignment
) {
739 ret
= lttng_metadata_printf(session
,
740 "struct {} align(%u) _%s;\n",
741 field
->type
.u
.struct_nestable
.alignment
* CHAR_BIT
,
747 ret
= lttng_metadata_printf(session
,
753 case lttng_ust_ctl_atype_enum_nestable
:
755 const struct lttng_ust_ctl_field
*container_field
;
756 const struct lttng_ust_ctl_type
*container_type
;
759 if (*iter_field
>= nr_fields
) {
763 container_field
= &fields
[*iter_field
];
764 container_type
= &container_field
->type
;
766 /* Only integers are supported as container types. */
767 if (container_type
->atype
!= lttng_ust_ctl_atype_integer
) {
771 ret
= ust_metadata_enum_statedump(session
,
772 field
->type
.u
.enum_nestable
.name
,
773 field
->type
.u
.enum_nestable
.id
,
774 &container_type
->u
.integer
,
775 field
->name
, iter_field
, nesting
);
786 int _lttng_context_metadata_statedump(ust_registry_session
*session
,
787 size_t nr_ctx_fields
,
788 struct lttng_ust_ctl_field
*ctx
)
796 if (i
>= nr_ctx_fields
) {
799 ret
= _lttng_field_statedump(session
, ctx
,
800 nr_ctx_fields
, &i
, 2);
809 int _lttng_fields_metadata_statedump(ust_registry_session
*session
,
810 struct ust_registry_event
*event
)
816 if (i
>= event
->nr_fields
) {
819 ret
= _lttng_field_statedump(session
, event
->fields
,
820 event
->nr_fields
, &i
, 2);
829 * Should be called with session registry mutex held.
831 int ust_metadata_event_statedump(ust_registry_session
*session
,
832 struct ust_registry_channel
*chan
,
833 struct ust_registry_event
*event
)
837 /* Don't dump metadata events */
838 if (chan
->chan_id
== -1U)
842 * We don't want to output an event's metadata before its parent
843 * stream's metadata. If the stream's metadata hasn't been output yet,
844 * skip this event. Its metadata will be output when we output the
847 if (!chan
->metadata_dumped
|| event
->metadata_dumped
) {
851 ret
= lttng_metadata_printf(session
,
855 " stream_id = %u;\n",
863 ret
= lttng_metadata_printf(session
,
865 event
->loglevel_value
);
870 if (event
->model_emf_uri
) {
871 ret
= lttng_metadata_printf(session
,
872 " model.emf.uri = \"%s\";\n",
873 event
->model_emf_uri
);
879 ret
= lttng_metadata_printf(session
,
880 " fields := struct {\n"
886 ret
= _lttng_fields_metadata_statedump(session
, event
);
891 ret
= lttng_metadata_printf(session
,
897 event
->metadata_dumped
= 1;
904 * Should be called with session registry mutex held.
906 * RCU read lock must be held by the caller.
908 int ust_metadata_channel_statedump(ust_registry_session
*session
,
909 struct ust_registry_channel
*chan
)
913 ASSERT_RCU_READ_LOCKED();
915 /* Don't dump metadata events */
916 if (chan
->chan_id
== -1U)
919 if (!chan
->header_type
)
922 ret
= lttng_metadata_printf(session
,
925 " event.header := %s;\n"
926 " packet.context := struct packet_context;\n",
928 chan
->header_type
== LTTNG_UST_CTL_CHANNEL_HEADER_COMPACT
?
929 "struct event_header_compact" :
930 "struct event_header_large");
935 if (chan
->ctx_fields
) {
936 ret
= lttng_metadata_printf(session
,
937 " event.context := struct {\n");
942 ret
= _lttng_context_metadata_statedump(session
,
948 if (chan
->ctx_fields
) {
949 ret
= lttng_metadata_printf(session
,
956 ret
= lttng_metadata_printf(session
,
962 /* Flag success of metadata dump. */
963 chan
->metadata_dumped
= 1;
966 * Output the metadata of any existing event.
968 * Sort the events by id. This is not necessary, but it's nice to have
969 * a more predictable order in the metadata file.
971 std::vector
<ust_registry_event
*> events
;
973 cds_lfht_iter event_iter
;
974 ust_registry_event
*event
;
975 cds_lfht_for_each_entry(chan
->events
->ht
, &event_iter
, event
,
977 events
.push_back(event
);
981 std::sort(events
.begin(), events
.end(),
982 [] (ust_registry_event
*a
, ust_registry_event
*b
) {
983 return a
->id
< b
->id
;
986 for (ust_registry_event
*event
: events
) {
987 ust_metadata_event_statedump(session
, chan
, event
);
994 int _lttng_stream_packet_context_declare(ust_registry_session
*session
)
996 return lttng_metadata_printf(session
,
997 "struct packet_context {\n"
998 " uint64_clock_monotonic_t timestamp_begin;\n"
999 " uint64_clock_monotonic_t timestamp_end;\n"
1000 " uint64_t content_size;\n"
1001 " uint64_t packet_size;\n"
1002 " uint64_t packet_seq_num;\n"
1003 " unsigned long events_discarded;\n"
1004 " uint32_t cpu_id;\n"
1011 * id: range: 0 - 30.
1012 * id 31 is reserved to indicate an extended header.
1015 * id: range: 0 - 65534.
1016 * id 65535 is reserved to indicate an extended header.
1019 int _lttng_event_header_declare(ust_registry_session
*session
)
1021 return lttng_metadata_printf(session
,
1022 "struct event_header_compact {\n"
1023 " enum : uint5_t { compact = 0 ... 30, extended = 31 } id;\n"
1026 " uint27_clock_monotonic_t timestamp;\n"
1030 " uint64_clock_monotonic_t timestamp;\n"
1035 "struct event_header_large {\n"
1036 " enum : uint16_t { compact = 0 ... 65534, extended = 65535 } id;\n"
1039 " uint32_clock_monotonic_t timestamp;\n"
1043 " uint64_clock_monotonic_t timestamp;\n"
1047 session
->_uint32_t_alignment
,
1048 session
->_uint16_t_alignment
1053 int print_metadata_session_information(ust_registry_session
*registry
)
1056 struct ltt_session
*session
= NULL
;
1057 char creation_datetime
[ISO8601_STR_LEN
];
1060 session
= session_find_by_id(registry
->_tracing_id
);
1066 /* Print the trace name */
1067 ret
= lttng_metadata_printf(registry
, " trace_name = \"");
1073 * This is necessary since the creation time is present in the session
1074 * name when it is generated.
1076 if (session
->has_auto_generated_name
) {
1077 ret
= print_escaped_ctf_string(registry
, DEFAULT_SESSION_NAME
);
1079 ret
= print_escaped_ctf_string(registry
, session
->name
);
1085 ret
= lttng_metadata_printf(registry
, "\";\n");
1090 /* Prepare creation time */
1091 ret
= time_to_iso8601_str(session
->creation_time
, creation_datetime
,
1092 sizeof(creation_datetime
));
1097 /* Output the reste of the information */
1098 ret
= lttng_metadata_printf(registry
,
1099 " trace_creation_datetime = \"%s\";\n"
1100 " hostname = \"%s\";\n",
1101 creation_datetime
, session
->hostname
);
1108 session_put(session
);
1115 int print_metadata_app_information(ust_registry_session
*registry
)
1117 if (registry
->get_buffering_scheme() != LTTNG_BUFFER_PER_PID
) {
1121 const auto *per_pid_session
= static_cast<const ust_registry_session_per_pid
*>(registry
);
1123 char datetime
[ISO8601_STR_LEN
];
1124 int ret
= time_to_iso8601_str(
1125 per_pid_session
->_app_creation_time
, datetime
, sizeof(datetime
));
1130 ret
= lttng_metadata_printf(registry
,
1131 " tracer_patchlevel = %u;\n"
1133 " procname = \"%s\";\n"
1134 " vpid_datetime = \"%s\";\n",
1135 per_pid_session
->_tracer_patch_level_version
, (int) per_pid_session
->_vpid
,
1136 per_pid_session
->_procname
.c_str(), datetime
);
1141 * Should be called with session registry mutex held.
1143 int ust_metadata_session_statedump(ust_registry_session
*session
)
1146 char trace_uuid_str
[LTTNG_UUID_STR_LEN
];
1148 LTTNG_ASSERT(session
);
1150 lttng_uuid_to_str(session
->_uuid
, trace_uuid_str
);
1153 ret
= lttng_metadata_printf(session
,
1154 "/* CTF %u.%u */\n\n",
1161 ret
= lttng_metadata_printf(session
,
1162 "typealias integer { size = 8; align = %u; signed = false; } := uint8_t;\n"
1163 "typealias integer { size = 16; align = %u; signed = false; } := uint16_t;\n"
1164 "typealias integer { size = 32; align = %u; signed = false; } := uint32_t;\n"
1165 "typealias integer { size = 64; align = %u; signed = false; } := uint64_t;\n"
1166 "typealias integer { size = %u; align = %u; signed = false; } := unsigned long;\n"
1167 "typealias integer { size = 5; align = 1; signed = false; } := uint5_t;\n"
1168 "typealias integer { size = 27; align = 1; signed = false; } := uint27_t;\n"
1174 " byte_order = %s;\n"
1175 " packet.header := struct {\n"
1176 " uint32_t magic;\n"
1177 " uint8_t uuid[16];\n"
1178 " uint32_t stream_id;\n"
1179 " uint64_t stream_instance_id;\n"
1182 session
->_uint8_t_alignment
,
1183 session
->_uint16_t_alignment
,
1184 session
->_uint32_t_alignment
,
1185 session
->_uint64_t_alignment
,
1186 session
->_bits_per_long
,
1187 session
->_long_alignment
,
1191 session
->_byte_order
== BIG_ENDIAN
? "be" : "le"
1197 ret
= lttng_metadata_printf(session
,
1199 " domain = \"ust\";\n"
1200 " tracer_name = \"lttng-ust\";\n"
1201 " tracer_major = %u;\n"
1202 " tracer_minor = %u;\n"
1203 " tracer_buffering_scheme = \"%s\";\n"
1204 " tracer_buffering_id = %u;\n"
1205 " architecture_bit_width = %u;\n",
1206 session
->_app_tracer_version_major
, session
->_app_tracer_version_minor
,
1207 session
->get_buffering_scheme() == LTTNG_BUFFER_PER_PID
? "pid" : "uid",
1208 session
->get_buffering_scheme() == LTTNG_BUFFER_PER_PID
?
1209 (int) static_cast<ust_registry_session_per_pid
*>(session
)->_vpid
:
1210 (int) static_cast<ust_registry_session_per_uid
*>(session
)->_tracing_uid
,
1211 session
->_bits_per_long
);
1216 ret
= print_metadata_session_information(session
);
1222 * If per-application registry, we can output extra information
1223 * about the application.
1225 ret
= print_metadata_app_information(session
);
1230 ret
= lttng_metadata_printf(session
,
1238 const lttng::ust::clock_attributes_sample clock
;
1240 ret
= lttng_metadata_printf(session
,
1242 " name = \"%s\";\n",
1243 clock
._name
.c_str());
1249 char clock_uuid_str
[LTTNG_UUID_STR_LEN
];
1251 lttng_uuid_to_str(*clock
._uuid
, clock_uuid_str
);
1252 ret
= lttng_metadata_printf(
1253 session
, " uuid = \"%s\";\n", clock_uuid_str
);
1259 ret
= lttng_metadata_printf(session
,
1260 " description = \"%s\";\n"
1261 " freq = %" PRIu64
"; /* Frequency, in Hz */\n"
1262 " /* clock value offset from Epoch is: offset * (1/freq) */\n"
1263 " offset = %" PRId64
";\n"
1265 clock
._description
.c_str(), clock
._frequency
, clock
._offset
);
1270 ret
= lttng_metadata_printf(session
,
1271 "typealias integer {\n"
1272 " size = 27; align = 1; signed = false;\n"
1273 " map = clock.%s.value;\n"
1274 "} := uint27_clock_monotonic_t;\n"
1276 "typealias integer {\n"
1277 " size = 32; align = %u; signed = false;\n"
1278 " map = clock.%s.value;\n"
1279 "} := uint32_clock_monotonic_t;\n"
1281 "typealias integer {\n"
1282 " size = 64; align = %u; signed = false;\n"
1283 " map = clock.%s.value;\n"
1284 "} := uint64_clock_monotonic_t;\n\n",
1285 clock
._name
.c_str(), session
->_uint32_t_alignment
,
1286 clock
._name
.c_str(), session
->_uint64_t_alignment
,
1287 clock
._name
.c_str());
1291 } catch (const std::exception
&ex
) {
1292 ERR("Failed to serialize clock description: %s", ex
.what());
1297 ret
= _lttng_stream_packet_context_declare(session
);
1302 ret
= _lttng_event_header_declare(session
);