Commit | Line | Data |
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5e96a467 MD |
1 | /* |
2 | * ust-core.c | |
3 | * | |
4 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
5 | * | |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; only | |
9 | * version 2.1 of the License. | |
10 | * | |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
3fbec7dc | 21 | #define _LGPL_SOURCE |
fb31eb73 | 22 | #include <stdint.h> |
b4051ad8 | 23 | #include <stddef.h> |
5e96a467 | 24 | #include <stdlib.h> |
44c72f10 MD |
25 | #include <lttng/ust-events.h> |
26 | #include <usterr-signal-safe.h> | |
797b05f6 | 27 | #include "lttng-tracer-core.h" |
c785c634 | 28 | #include "jhash.h" |
5e96a467 | 29 | |
7dd08bec | 30 | static CDS_LIST_HEAD(lttng_transport_list); |
ebabbf58 | 31 | static CDS_LIST_HEAD(lttng_counter_transport_list); |
c1fca457 | 32 | |
7dd08bec | 33 | struct lttng_transport *lttng_transport_find(const char *name) |
c1fca457 | 34 | { |
7dd08bec | 35 | struct lttng_transport *transport; |
c1fca457 | 36 | |
7dd08bec | 37 | cds_list_for_each_entry(transport, <tng_transport_list, node) { |
c1fca457 MD |
38 | if (!strcmp(transport->name, name)) |
39 | return transport; | |
40 | } | |
41 | return NULL; | |
42 | } | |
43 | ||
ebabbf58 MD |
44 | struct lttng_counter_transport *lttng_counter_transport_find(const char *name) |
45 | { | |
46 | struct lttng_counter_transport *transport; | |
47 | ||
48 | cds_list_for_each_entry(transport, <tng_counter_transport_list, node) { | |
49 | if (!strcmp(transport->name, name)) | |
50 | return transport; | |
51 | } | |
52 | return NULL; | |
53 | } | |
54 | ||
c1fca457 | 55 | /** |
7dd08bec | 56 | * lttng_transport_register - LTT transport registration |
c1fca457 MD |
57 | * @transport: transport structure |
58 | * | |
59 | * Registers a transport which can be used as output to extract the data out of | |
60 | * LTTng. Called with ust_lock held. | |
61 | */ | |
7dd08bec | 62 | void lttng_transport_register(struct lttng_transport *transport) |
c1fca457 | 63 | { |
7dd08bec | 64 | cds_list_add_tail(&transport->node, <tng_transport_list); |
c1fca457 MD |
65 | } |
66 | ||
67 | /** | |
7dd08bec | 68 | * lttng_transport_unregister - LTT transport unregistration |
c1fca457 MD |
69 | * @transport: transport structure |
70 | * Called with ust_lock held. | |
71 | */ | |
7dd08bec | 72 | void lttng_transport_unregister(struct lttng_transport *transport) |
c1fca457 MD |
73 | { |
74 | cds_list_del(&transport->node); | |
75 | } | |
c785c634 | 76 | |
ebabbf58 MD |
77 | /** |
78 | * lttng_counter_transport_register - LTTng counter transport registration | |
79 | * @transport: transport structure | |
80 | * | |
81 | * Registers a counter transport which can be used as output to extract | |
82 | * the data out of LTTng. Called with ust_lock held. | |
83 | */ | |
84 | void lttng_counter_transport_register(struct lttng_counter_transport *transport) | |
85 | { | |
86 | cds_list_add_tail(&transport->node, <tng_counter_transport_list); | |
87 | } | |
88 | ||
89 | /** | |
90 | * lttng_counter_transport_unregister - LTTng counter transport unregistration | |
91 | * @transport: transport structure | |
92 | * Called with ust_lock held. | |
93 | */ | |
94 | void lttng_counter_transport_unregister(struct lttng_counter_transport *transport) | |
95 | { | |
96 | cds_list_del(&transport->node); | |
97 | } | |
98 | ||
c785c634 MD |
99 | /* |
100 | * Needed by comm layer. | |
101 | */ | |
b33b46f7 FD |
102 | struct lttng_enum *lttng_ust_enum_get_from_desc(struct lttng_session *session, |
103 | const struct lttng_enum_desc *enum_desc) | |
c785c634 MD |
104 | { |
105 | struct lttng_enum *_enum; | |
106 | struct cds_hlist_head *head; | |
107 | struct cds_hlist_node *node; | |
b33b46f7 | 108 | size_t name_len = strlen(enum_desc->name); |
c785c634 MD |
109 | uint32_t hash; |
110 | ||
b33b46f7 | 111 | hash = jhash(enum_desc->name, name_len, 0); |
c785c634 MD |
112 | head = &session->enums_ht.table[hash & (LTTNG_UST_ENUM_HT_SIZE - 1)]; |
113 | cds_hlist_for_each_entry(_enum, node, head, hlist) { | |
114 | assert(_enum->desc); | |
b33b46f7 | 115 | if (_enum->desc == enum_desc) |
c785c634 MD |
116 | return _enum; |
117 | } | |
118 | return NULL; | |
119 | } | |
797b05f6 MD |
120 | |
121 | size_t lttng_ust_dummy_get_size(struct lttng_ctx_field *field, size_t offset) | |
122 | { | |
123 | size_t size = 0; | |
124 | ||
125 | size += lib_ring_buffer_align(offset, lttng_alignof(char)); | |
126 | size += sizeof(char); /* tag */ | |
127 | return size; | |
128 | } | |
129 | ||
130 | void lttng_ust_dummy_record(struct lttng_ctx_field *field, | |
131 | struct lttng_ust_lib_ring_buffer_ctx *ctx, | |
132 | struct lttng_channel *chan) | |
133 | { | |
134 | char sel_char = (char) LTTNG_UST_DYNAMIC_TYPE_NONE; | |
135 | ||
136 | lib_ring_buffer_align_ctx(ctx, lttng_alignof(sel_char)); | |
137 | chan->ops->event_write(ctx, &sel_char, sizeof(sel_char)); | |
138 | } | |
139 | ||
140 | void lttng_ust_dummy_get_value(struct lttng_ctx_field *field, | |
141 | struct lttng_ctx_value *value) | |
142 | { | |
143 | value->sel = LTTNG_UST_DYNAMIC_TYPE_NONE; | |
144 | } | |
ce47f5d8 MD |
145 | |
146 | int lttng_context_is_app(const char *name) | |
147 | { | |
148 | if (strncmp(name, "$app.", strlen("$app.")) != 0) { | |
149 | return 0; | |
150 | } | |
151 | return 1; | |
152 | } |