Commit | Line | Data |
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5e96a467 | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: LGPL-2.1-only |
5e96a467 MD |
3 | * |
4 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
5e96a467 MD |
5 | */ |
6 | ||
3fbec7dc | 7 | #define _LGPL_SOURCE |
fb31eb73 | 8 | #include <stdint.h> |
b4051ad8 | 9 | #include <stddef.h> |
5e96a467 | 10 | #include <stdlib.h> |
44c72f10 MD |
11 | #include <lttng/ust-events.h> |
12 | #include <usterr-signal-safe.h> | |
797b05f6 | 13 | #include "lttng-tracer-core.h" |
c785c634 | 14 | #include "jhash.h" |
5e96a467 | 15 | |
7dd08bec | 16 | static CDS_LIST_HEAD(lttng_transport_list); |
ebabbf58 | 17 | static CDS_LIST_HEAD(lttng_counter_transport_list); |
c1fca457 | 18 | |
7dd08bec | 19 | struct lttng_transport *lttng_transport_find(const char *name) |
c1fca457 | 20 | { |
7dd08bec | 21 | struct lttng_transport *transport; |
c1fca457 | 22 | |
7dd08bec | 23 | cds_list_for_each_entry(transport, <tng_transport_list, node) { |
c1fca457 MD |
24 | if (!strcmp(transport->name, name)) |
25 | return transport; | |
26 | } | |
27 | return NULL; | |
28 | } | |
29 | ||
ebabbf58 MD |
30 | struct lttng_counter_transport *lttng_counter_transport_find(const char *name) |
31 | { | |
32 | struct lttng_counter_transport *transport; | |
33 | ||
34 | cds_list_for_each_entry(transport, <tng_counter_transport_list, node) { | |
35 | if (!strcmp(transport->name, name)) | |
36 | return transport; | |
37 | } | |
38 | return NULL; | |
39 | } | |
40 | ||
c1fca457 | 41 | /** |
7dd08bec | 42 | * lttng_transport_register - LTT transport registration |
c1fca457 MD |
43 | * @transport: transport structure |
44 | * | |
45 | * Registers a transport which can be used as output to extract the data out of | |
46 | * LTTng. Called with ust_lock held. | |
47 | */ | |
7dd08bec | 48 | void lttng_transport_register(struct lttng_transport *transport) |
c1fca457 | 49 | { |
7dd08bec | 50 | cds_list_add_tail(&transport->node, <tng_transport_list); |
c1fca457 MD |
51 | } |
52 | ||
53 | /** | |
7dd08bec | 54 | * lttng_transport_unregister - LTT transport unregistration |
c1fca457 MD |
55 | * @transport: transport structure |
56 | * Called with ust_lock held. | |
57 | */ | |
7dd08bec | 58 | void lttng_transport_unregister(struct lttng_transport *transport) |
c1fca457 MD |
59 | { |
60 | cds_list_del(&transport->node); | |
61 | } | |
c785c634 | 62 | |
ebabbf58 MD |
63 | /** |
64 | * lttng_counter_transport_register - LTTng counter transport registration | |
65 | * @transport: transport structure | |
66 | * | |
67 | * Registers a counter transport which can be used as output to extract | |
68 | * the data out of LTTng. Called with ust_lock held. | |
69 | */ | |
70 | void lttng_counter_transport_register(struct lttng_counter_transport *transport) | |
71 | { | |
72 | cds_list_add_tail(&transport->node, <tng_counter_transport_list); | |
73 | } | |
74 | ||
75 | /** | |
76 | * lttng_counter_transport_unregister - LTTng counter transport unregistration | |
77 | * @transport: transport structure | |
78 | * Called with ust_lock held. | |
79 | */ | |
80 | void lttng_counter_transport_unregister(struct lttng_counter_transport *transport) | |
81 | { | |
82 | cds_list_del(&transport->node); | |
83 | } | |
84 | ||
c785c634 MD |
85 | /* |
86 | * Needed by comm layer. | |
87 | */ | |
b33b46f7 FD |
88 | struct lttng_enum *lttng_ust_enum_get_from_desc(struct lttng_session *session, |
89 | const struct lttng_enum_desc *enum_desc) | |
c785c634 MD |
90 | { |
91 | struct lttng_enum *_enum; | |
92 | struct cds_hlist_head *head; | |
93 | struct cds_hlist_node *node; | |
b33b46f7 | 94 | size_t name_len = strlen(enum_desc->name); |
c785c634 MD |
95 | uint32_t hash; |
96 | ||
b33b46f7 | 97 | hash = jhash(enum_desc->name, name_len, 0); |
c785c634 MD |
98 | head = &session->enums_ht.table[hash & (LTTNG_UST_ENUM_HT_SIZE - 1)]; |
99 | cds_hlist_for_each_entry(_enum, node, head, hlist) { | |
100 | assert(_enum->desc); | |
b33b46f7 | 101 | if (_enum->desc == enum_desc) |
c785c634 MD |
102 | return _enum; |
103 | } | |
104 | return NULL; | |
105 | } | |
797b05f6 MD |
106 | |
107 | size_t lttng_ust_dummy_get_size(struct lttng_ctx_field *field, size_t offset) | |
108 | { | |
109 | size_t size = 0; | |
110 | ||
111 | size += lib_ring_buffer_align(offset, lttng_alignof(char)); | |
112 | size += sizeof(char); /* tag */ | |
113 | return size; | |
114 | } | |
115 | ||
116 | void lttng_ust_dummy_record(struct lttng_ctx_field *field, | |
117 | struct lttng_ust_lib_ring_buffer_ctx *ctx, | |
118 | struct lttng_channel *chan) | |
119 | { | |
120 | char sel_char = (char) LTTNG_UST_DYNAMIC_TYPE_NONE; | |
121 | ||
122 | lib_ring_buffer_align_ctx(ctx, lttng_alignof(sel_char)); | |
123 | chan->ops->event_write(ctx, &sel_char, sizeof(sel_char)); | |
124 | } | |
125 | ||
126 | void lttng_ust_dummy_get_value(struct lttng_ctx_field *field, | |
127 | struct lttng_ctx_value *value) | |
128 | { | |
129 | value->sel = LTTNG_UST_DYNAMIC_TYPE_NONE; | |
130 | } | |
ce47f5d8 MD |
131 | |
132 | int lttng_context_is_app(const char *name) | |
133 | { | |
134 | if (strncmp(name, "$app.", strlen("$app.")) != 0) { | |
135 | return 0; | |
136 | } | |
137 | return 1; | |
138 | } |