Commit | Line | Data |
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eb5c4f4e JG |
1 | /* |
2 | * event.c | |
3 | * | |
4 | * Linux Trace Toolkit Control Library | |
5 | * | |
ab5be9fa | 6 | * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
eb5c4f4e | 7 | * |
ab5be9fa | 8 | * SPDX-License-Identifier: LGPL-2.1-only |
eb5c4f4e | 9 | * |
eb5c4f4e JG |
10 | */ |
11 | ||
12 | #define _LGPL_SOURCE | |
ef0e06bc | 13 | #include <assert.h> |
eb5c4f4e | 14 | #include <stddef.h> |
ef0e06bc JG |
15 | |
16 | #include <common/error.h> | |
eb5c4f4e | 17 | #include <common/sessiond-comm/sessiond-comm.h> |
ef0e06bc JG |
18 | #include <lttng/event-internal.h> |
19 | #include <lttng/event.h> | |
20 | #include <lttng/lttng-error.h> | |
21 | #include <lttng/userspace-probe-internal.h> | |
22 | ||
23 | struct lttng_event *lttng_event_create(void) | |
24 | { | |
25 | struct lttng_event *event; | |
26 | struct lttng_event_extended *event_extended; | |
27 | ||
28 | event = zmalloc(sizeof(*event)); | |
29 | if (!event) { | |
30 | PERROR("Error allocating event structure"); | |
31 | goto end; | |
32 | } | |
33 | ||
34 | event_extended = zmalloc(sizeof(*event_extended)); | |
35 | if (!event_extended) { | |
36 | PERROR("Error allocating event extended structure"); | |
37 | goto error; | |
38 | } | |
39 | event->extended.ptr = event_extended; | |
40 | end: | |
41 | return event; | |
42 | error: | |
43 | free(event); | |
37750a61 | 44 | event = NULL; |
ef0e06bc JG |
45 | goto end; |
46 | } | |
47 | ||
48 | void lttng_event_destroy(struct lttng_event *event) | |
49 | { | |
50 | struct lttng_event_extended *event_extended; | |
51 | ||
52 | if (!event) { | |
53 | return; | |
54 | } | |
55 | ||
56 | event_extended = (struct lttng_event_extended *) event->extended.ptr; | |
57 | ||
58 | if (event_extended) { | |
59 | if (event_extended->probe_location) { | |
60 | lttng_userspace_probe_location_destroy( | |
61 | event_extended->probe_location); | |
62 | } | |
63 | free(event_extended); | |
64 | } | |
65 | free(event); | |
66 | } | |
eb5c4f4e JG |
67 | |
68 | int lttng_event_get_filter_expression(struct lttng_event *event, | |
69 | const char **filter_expression) | |
70 | { | |
71 | int ret = 0; | |
de453daa | 72 | struct lttng_event_extended *event_extended; |
eb5c4f4e JG |
73 | |
74 | if (!event || !filter_expression) { | |
75 | ret = -LTTNG_ERR_INVALID; | |
76 | goto end; | |
77 | } | |
78 | ||
de453daa JG |
79 | event_extended = (struct lttng_event_extended *) event->extended.ptr; |
80 | if (!event_extended) { | |
eb5c4f4e JG |
81 | /* |
82 | * This can happen since the lttng_event structure is | |
83 | * used for other tasks where this pointer is never set. | |
84 | */ | |
85 | *filter_expression = NULL; | |
86 | goto end; | |
87 | } | |
88 | ||
de453daa | 89 | *filter_expression = event_extended->filter_expression; |
eb5c4f4e JG |
90 | end: |
91 | return ret; | |
92 | } | |
93 | ||
94 | int lttng_event_get_exclusion_name_count(struct lttng_event *event) | |
95 | { | |
de453daa JG |
96 | int ret = 0; |
97 | struct lttng_event_extended *event_extended; | |
eb5c4f4e JG |
98 | |
99 | if (!event) { | |
100 | ret = -LTTNG_ERR_INVALID; | |
101 | goto end; | |
102 | } | |
103 | ||
de453daa JG |
104 | event_extended = (struct lttng_event_extended *) event->extended.ptr; |
105 | if (!event_extended) { | |
eb5c4f4e JG |
106 | /* |
107 | * This can happen since the lttng_event structure is | |
108 | * used for other tasks where this pointer is never set. | |
109 | */ | |
eb5c4f4e JG |
110 | goto end; |
111 | } | |
112 | ||
de453daa | 113 | if (event_extended->exclusions.count > INT_MAX) { |
eb5c4f4e JG |
114 | ret = -LTTNG_ERR_OVERFLOW; |
115 | goto end; | |
116 | } | |
de453daa | 117 | ret = (int) event_extended->exclusions.count; |
eb5c4f4e JG |
118 | end: |
119 | return ret; | |
120 | } | |
121 | ||
122 | int lttng_event_get_exclusion_name(struct lttng_event *event, | |
123 | size_t index, const char **exclusion_name) | |
124 | { | |
125 | int ret = 0; | |
de453daa | 126 | struct lttng_event_extended *event_extended; |
eb5c4f4e JG |
127 | |
128 | if (!event || !exclusion_name) { | |
129 | ret = -LTTNG_ERR_INVALID; | |
130 | goto end; | |
131 | } | |
132 | ||
de453daa JG |
133 | if (index > UINT_MAX) { |
134 | ret = -LTTNG_ERR_OVERFLOW; | |
eb5c4f4e JG |
135 | goto end; |
136 | } | |
137 | ||
de453daa JG |
138 | event_extended = (struct lttng_event_extended *) event->extended.ptr; |
139 | if (!event_extended) { | |
140 | /* | |
141 | * This can happen since the lttng_event structure is | |
142 | * used for other tasks where this pointer is never set. | |
143 | */ | |
eb5c4f4e JG |
144 | ret = -LTTNG_ERR_INVALID; |
145 | goto end; | |
146 | } | |
147 | ||
de453daa JG |
148 | if (index >= event_extended->exclusions.count) { |
149 | ret = -LTTNG_ERR_INVALID; | |
150 | goto end; | |
151 | } | |
eb5c4f4e | 152 | |
de453daa JG |
153 | *exclusion_name = event_extended->exclusions.strings + |
154 | (index * LTTNG_SYMBOL_NAME_LEN); | |
eb5c4f4e JG |
155 | end: |
156 | return ret; | |
157 | } | |
ef0e06bc | 158 | |
87597c2c JG |
159 | const struct lttng_userspace_probe_location * |
160 | lttng_event_get_userspace_probe_location(const struct lttng_event *event) | |
ef0e06bc JG |
161 | { |
162 | struct lttng_userspace_probe_location *probe_location = NULL; | |
163 | struct lttng_event_extended *event_extended; | |
164 | ||
165 | if (!event) { | |
166 | goto end; | |
167 | } | |
168 | ||
169 | event_extended = (struct lttng_event_extended *) event->extended.ptr; | |
170 | if (!event_extended) { | |
171 | goto end; | |
172 | } | |
173 | probe_location = event_extended->probe_location; | |
174 | end: | |
175 | return probe_location; | |
176 | } | |
177 | ||
178 | int lttng_event_set_userspace_probe_location(struct lttng_event *event, | |
179 | struct lttng_userspace_probe_location *probe_location) | |
180 | { | |
181 | int ret = 0; | |
182 | struct lttng_event_extended *event_extended; | |
183 | ||
184 | if (!event || !probe_location) { | |
185 | ret = -LTTNG_ERR_INVALID; | |
186 | goto end; | |
187 | } | |
188 | ||
189 | event_extended = (struct lttng_event_extended *) event->extended.ptr; | |
190 | assert(event_extended); | |
191 | if (event_extended->probe_location) { | |
192 | lttng_userspace_probe_location_destroy( | |
193 | event_extended->probe_location); | |
194 | } | |
195 | event_extended->probe_location = probe_location; | |
196 | end: | |
197 | return ret; | |
198 | } |