Commit | Line | Data |
---|---|---|
5e0cbfb0 PP |
1 | --- |
2 | id: lttng-modules-tp-struct-entry | |
3 | --- | |
4 | ||
5 | This table describes possible entries for the `TP_STRUCT__entry()` part | |
6 | of `LTTNG_TRACEPOINT_EVENT()`: | |
7 | ||
f6875860 | 8 | <div class="table"> |
5e0cbfb0 PP |
9 | <table class="func-desc"> |
10 | <thead> | |
11 | <tr> | |
12 | <th>Macro</th> | |
13 | <th>Description/arguments</th> | |
14 | </tr> | |
15 | </thead> | |
16 | <tbody> | |
17 | <tr> | |
18 | <td> | |
19 | <ul> | |
20 | <li><code class="no-bg">__field(<span class="arg">t</span>, <span class="arg">n</span>)</code></li> | |
21 | </ul> | |
22 | </td> | |
23 | <td> | |
24 | <p>Standard integer, displayed in base 10</p> | |
25 | <ul> | |
26 | <li> | |
27 | <code class="arg">t</code> integer C type | |
28 | (<code>int</code>, <code>unsigned char</code>, | |
ba3b1994 | 29 | <code>size_t</code>, ...) |
5e0cbfb0 PP |
30 | </li> |
31 | <li><code class="arg">n</code> field name</li> | |
32 | </ul> | |
33 | </td> | |
34 | </tr> | |
35 | <tr> | |
36 | <td> | |
37 | <ul> | |
38 | <li><code class="no-bg">__field_hex(<span class="arg">t</span>, <span class="arg">n</span>)</code></li> | |
39 | </ul> | |
40 | </td> | |
41 | <td> | |
42 | <p>Standard integer, displayed in base 16</p> | |
43 | <ul> | |
44 | <li><code class="arg">t</code> integer C type</li> | |
45 | <li><code class="arg">n</code> field name</li> | |
46 | </ul> | |
47 | </td> | |
48 | </tr> | |
49 | <tr> | |
50 | <td> | |
51 | <ul> | |
52 | <li><code class="no-bg">__field_oct(<span class="arg">t</span>, <span class="arg">n</span>)</code></li> | |
53 | </ul> | |
54 | </td> | |
55 | <td> | |
56 | <p>Standard integer, displayed in base 8</p> | |
57 | <ul> | |
58 | <li> | |
59 | <code class="arg">t</code> integer C type | |
60 | </li> | |
61 | <li><code class="arg">n</code> field name</li> | |
62 | </ul> | |
63 | </td> | |
64 | </tr> | |
65 | <tr> | |
66 | <td> | |
67 | <ul> | |
68 | <li><code class="no-bg">__field_network(<span class="arg">t</span>, <span class="arg">n</span>)</code></li> | |
69 | </ul> | |
70 | </td> | |
71 | <td> | |
72 | <p> | |
73 | Integer in network byte order (big endian), | |
74 | displayed in base 10 | |
75 | </p> | |
76 | <ul> | |
77 | <li> | |
78 | <code class="arg">t</code> integer C type | |
79 | </li> | |
80 | <li><code class="arg">n</code> field name</li> | |
81 | </ul> | |
82 | </td> | |
83 | </tr> | |
84 | <tr> | |
85 | <td> | |
86 | <ul> | |
87 | <li><code class="no-bg">__field_network_hex(<span class="arg">t</span>, <span class="arg">n</span>)</code></li> | |
88 | </ul> | |
89 | </td> | |
90 | <td> | |
91 | <p> | |
92 | Integer in network byte order (big endian), | |
93 | displayed in base 16 | |
94 | </p> | |
95 | <ul> | |
96 | <li> | |
97 | <code class="arg">t</code> integer C type | |
98 | </li> | |
99 | <li><code class="arg">n</code> field name</li> | |
100 | </ul> | |
101 | </td> | |
102 | </tr> | |
103 | <tr> | |
104 | <td> | |
105 | <ul> | |
106 | <li><code class="no-bg">__array(<span class="arg">t</span>, <span class="arg">n</span>, <span class="arg">s</span>)</code></li> | |
107 | </ul> | |
108 | </td> | |
109 | <td> | |
110 | <p>Statically-sized array, elements displayed in base 10</p> | |
111 | <ul> | |
112 | <li> | |
113 | <code class="arg">t</code> array element C type | |
114 | </li> | |
115 | <li><code class="arg">n</code> field name</li> | |
116 | <li><code class="arg">s</code> number of elements</li> | |
117 | </ul> | |
118 | </td> | |
119 | </tr> | |
120 | <tr> | |
121 | <td> | |
122 | <ul> | |
123 | <li><code class="no-bg">__array_hex(<span class="arg">t</span>, <span class="arg">n</span>, <span class="arg">s</span>)</code></li> | |
124 | </ul> | |
125 | </td> | |
126 | <td> | |
127 | <p>Statically-sized array, elements displayed in base 16</p> | |
128 | <ul> | |
129 | <li> | |
130 | <code class="arg">t</code> array element C type | |
131 | </li> | |
132 | <li><code class="arg">n</code> field name</li> | |
133 | <li><code class="arg">s</code> number of elements</li> | |
134 | </ul> | |
135 | </td> | |
136 | </tr> | |
137 | <tr> | |
138 | <td> | |
139 | <ul> | |
140 | <li><code class="no-bg">__array_text(<span class="arg">t</span>, <span class="arg">n</span>, <span class="arg">s</span>)</code></li> | |
141 | </ul> | |
142 | </td> | |
143 | <td> | |
144 | <p>Statically-sized array, displayed as text</p> | |
145 | <ul> | |
146 | <li> | |
147 | <code class="arg">t</code> array element C type | |
148 | (always <code>char</code>) | |
149 | </li> | |
150 | <li><code class="arg">n</code> field name</li> | |
151 | <li><code class="arg">s</code> number of elements</li> | |
152 | </ul> | |
153 | </td> | |
154 | </tr> | |
155 | <tr> | |
156 | <td> | |
157 | <ul> | |
158 | <li><code class="no-bg">__dynamic_array(<span class="arg">t</span>, <span class="arg">n</span>, <span class="arg">s</span>)</code></li> | |
159 | </ul> | |
160 | </td> | |
161 | <td> | |
162 | <p>Dynamically-sized array, displayed in base 10</p> | |
163 | <ul> | |
164 | <li> | |
165 | <code class="arg">t</code> array element C type | |
166 | </li> | |
167 | <li><code class="arg">n</code> field name</li> | |
168 | <li><code class="arg">s</code> length C expression</li> | |
169 | </ul> | |
170 | </td> | |
171 | </tr> | |
172 | <tr> | |
173 | <td> | |
174 | <ul> | |
175 | <li><code class="no-bg">__dynamic_array_hex(<span class="arg">t</span>, <span class="arg">n</span>, <span class="arg">s</span>)</code></li> | |
176 | </ul> | |
177 | </td> | |
178 | <td> | |
179 | <p>Dynamically-sized array, displayed in base 16</p> | |
180 | <ul> | |
181 | <li> | |
182 | <code class="arg">t</code> array element C type | |
183 | </li> | |
184 | <li><code class="arg">n</code> field name</li> | |
185 | <li><code class="arg">s</code> length C expression</li> | |
186 | </ul> | |
187 | </td> | |
188 | </tr> | |
189 | <tr> | |
190 | <td> | |
191 | <ul> | |
192 | <li><code class="no-bg">__dynamic_array_text(<span class="arg">t</span>, <span class="arg">n</span>, <span class="arg">s</span>)</code></li> | |
193 | </ul> | |
194 | </td> | |
195 | <td> | |
196 | <p>Dynamically-sized array, displayed as text</p> | |
197 | <ul> | |
198 | <li> | |
199 | <code class="arg">t</code> array element C type | |
200 | (always <code>char</code>) | |
201 | </li> | |
202 | <li><code class="arg">n</code> field name</li> | |
203 | <li><code class="arg">s</code> length C expression</li> | |
204 | </ul> | |
205 | </td> | |
206 | </tr> | |
207 | <tr> | |
208 | <td> | |
209 | <ul> | |
210 | <li><code class="no-bg">__string(<span class="arg">n</span>, <span class="arg">s</span>)</code></li> | |
211 | </ul> | |
212 | </td> | |
213 | <td> | |
214 | <p> | |
215 | Null-terminated string; undefined behavior | |
216 | if <code class="arg">s</code> is <code>NULL</code> | |
217 | </p> | |
218 | <ul> | |
219 | <li><code class="arg">n</code> field name</li> | |
220 | <li><code class="arg">s</code> string source (pointer)</li> | |
221 | </ul> | |
222 | </td> | |
223 | </tr> | |
224 | </tbody> | |
225 | </table> | |
f6875860 | 226 | </div> |
5e0cbfb0 PP |
227 | |
228 | The above macros should cover the majority of cases. For advanced items, | |
229 | see `probes/lttng-events.h`. |