---
id: liblttng‑ust‑libc‑pthread-wrapper
+since: 2.3
---
`liblttng-ust-libc-wrapper.so` and `liblttng-ust-pthread-wrapper.so`
<tbody>
<tr>
<td rowspan="6">
- <code class="no-bg">ust_libc</code>
+ <code class="no-bg">lttng_ust_libc</code>
</td>
<td>
<code class="no-bg">malloc</code>
<tbody>
<tr>
<td rowspan="4">
- <code class="no-bg">ust_pthread</code>
+ <code class="no-bg">lttng_ust_pthread</code>
</td>
<td>
<code class="no-bg">pthread_mutex_lock_req</code>