Commit | Line | Data |
---|---|---|
5e0cbfb0 PP |
1 | --- |
2 | id: lttng-modules-tp-fast-assign | |
3 | --- | |
4 | ||
5 | This table describes possible entries for the `TP_fast_assign()` part | |
6 | of `LTTNG_TRACEPOINT_EVENT()`: | |
7 | ||
8 | <table class="func-desc"> | |
9 | <thead> | |
10 | <tr> | |
11 | <th>Macro</th> | |
12 | <th>Description/arguments</th> | |
13 | </tr> | |
14 | </thead> | |
15 | <tbody> | |
16 | <tr> | |
17 | <td> | |
18 | <ul> | |
19 | <li><code class="no-bg">tp_assign(<span class="arg">d</span>, <span class="arg">s</span>)</code></li> | |
20 | </ul> | |
21 | </td> | |
22 | <td> | |
23 | <p> | |
24 | Assignment of C expression <code class="arg">s</code> | |
25 | to tracepoint field <code class="arg">d</code> | |
26 | </p> | |
27 | <ul> | |
28 | <li> | |
29 | <code class="arg">d</code> name of destination | |
30 | tracepoint field | |
31 | </li> | |
32 | <li> | |
33 | <code class="arg">s</code> source C expression | |
34 | (may refer to tracepoint arguments) | |
35 | </li> | |
36 | </ul> | |
37 | </td> | |
38 | </tr> | |
39 | <tr> | |
40 | <td> | |
41 | <ul> | |
42 | <li><code class="no-bg">tp_memcpy(<span class="arg">d</span>, <span class="arg">s</span>, <span class="arg">l</span>)</code></li> | |
43 | </ul> | |
44 | </td> | |
45 | <td> | |
46 | <p> | |
47 | Memory copy of <code class="arg">l</code> bytes from | |
48 | <code class="arg">s</code> to tracepoint field | |
49 | <code class="arg">d</code> (use with array fields) | |
50 | </p> | |
51 | <ul> | |
52 | <li> | |
53 | <code class="arg">d</code> name of destination | |
54 | tracepoint field | |
55 | </li> | |
56 | <li> | |
57 | <code class="arg">s</code> source C expression | |
58 | (may refer to tracepoint arguments) | |
59 | </li> | |
60 | <li> | |
61 | <code class="arg">l</code> number of bytes to | |
62 | copy | |
63 | </li> | |
64 | </ul> | |
65 | </td> | |
66 | </tr> | |
67 | <tr> | |
68 | <td> | |
69 | <ul> | |
70 | <li><code class="no-bg">tp_memcpy_from_user(<span class="arg">d</span>, <span class="arg">s</span>, <span class="arg">l</span>)</code></li> | |
71 | </ul> | |
72 | </td> | |
73 | <td> | |
74 | <p> | |
75 | Memory copy of <code class="arg">l</code> bytes from | |
76 | user space <code class="arg">s</code> to tracepoint field | |
77 | <code class="arg">d</code> (use with array fields) | |
78 | </p> | |
79 | <ul> | |
80 | <li> | |
81 | <code class="arg">d</code> name of destination | |
82 | tracepoint field | |
83 | </li> | |
84 | <li> | |
85 | <code class="arg">s</code> source C expression | |
86 | (may refer to tracepoint arguments) | |
87 | </li> | |
88 | <li> | |
89 | <code class="arg">l</code> number of bytes to | |
90 | copy | |
91 | </li> | |
92 | </ul> | |
93 | </td> | |
94 | </tr> | |
95 | <tr> | |
96 | <td> | |
97 | <ul> | |
98 | <li><code class="no-bg">tp_memcpy_dyn(<span class="arg">d</span>, <span class="arg">s</span>)</code></li> | |
99 | </ul> | |
100 | </td> | |
101 | <td> | |
102 | <p> | |
103 | Memory copy of dynamically-sized array | |
104 | from <code class="arg">s</code> to tracepoint field | |
105 | <code class="arg">d</code>; number of bytes is | |
106 | known from the field's length expression (use with | |
107 | dynamically-sized array fields) | |
108 | </p> | |
109 | <ul> | |
110 | <li> | |
111 | <code class="arg">d</code> name of destination | |
112 | tracepoint field | |
113 | </li> | |
114 | <li> | |
115 | <code class="arg">s</code> source C expression | |
116 | (may refer to tracepoint arguments) | |
117 | </li> | |
118 | <li> | |
119 | <code class="arg">l</code> number of bytes to | |
120 | copy | |
121 | </li> | |
122 | </ul> | |
123 | </td> | |
124 | </tr> | |
125 | <tr> | |
126 | <td> | |
127 | <ul> | |
128 | <li><code class="no-bg">tp_strcpy(<span class="arg">d</span>, <span class="arg">s</span>)</code></li> | |
129 | </ul> | |
130 | </td> | |
131 | <td> | |
132 | <p> | |
133 | String copy of <code class="arg">s</code> | |
134 | to tracepoint field <code class="arg">d</code> | |
135 | (use with string fields) | |
136 | </p> | |
137 | <ul> | |
138 | <li> | |
139 | <code class="arg">d</code> name of destination | |
140 | tracepoint field | |
141 | </li> | |
142 | <li> | |
143 | <code class="arg">s</code> source C expression | |
144 | (may refer to tracepoint arguments) | |
145 | </li> | |
146 | </ul> | |
147 | </td> | |
148 | </tr> | |
149 | </tbody> | |
150 | </table> |