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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - LLVM not properly shutdown in `si_pipe.c`?"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109794">109794</a>
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<th>Summary</th>
<td>LLVM not properly shutdown in `si_pipe.c`?
</td>
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>git
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>Linux (All)
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>minor
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>Drivers/Gallium/radeonsi
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
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<th>Reporter</th>
<td>zegentzy@protonmail.com
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</tr>
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<th>QA Contact</th>
<td>dri-devel@lists.freedesktop.org
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<p>
<div>
<pre>tl;dr; Shouldn't we be calling `LLVMShutdown()` somewhere?
I had a program which was calling:
```
eglInitialize(disp, &majoir, &minor);
eglTerminate(disp);
eglInitialize(disp, &majoir, &minor);
```
Which lead to mesa outputting the following before continuing on normally
during the second call to `eglInitalize`:
```
mesa: for the -simplifycfg-sink-common option: may only occur zero or one
times!
mesa: for the -global-isel-abort option: may only occur zero or one times!
```
This prompted an investigation me to investigate, and with the aid of @imirkin,
I think I got the cause.
You see, in an `eglInitialize` call `radeonsi_dri.so` gets loaded, which also
loads in `libLLVM-9svn.so`, and eventually `ac_init_llvm_once()` gets called
more than once.
That's OK, for as the name implies, it only happens once.
Issue is, when `eglTerminate` is called, `radeonsi_dri.so` gets unloaded, but
not `libLLVM-9svn.so`. This means that the next time we all `eglInitialize`,
LLVM's `ManagedStatic`s will be preserved, but not our static var
`ac_init_llvm_target_once_flag`.
We can fix this by calling `LLVMShutdown` before unloading `radeonsi_dri.so`,
that way LLVM's `ManagedStatic`s are also reset.
Alas, I'm not familiar enough with the mesa codebase, so I got no clue where
the appropriate place to plop this function is. Any aid would be well
appreciated.</pre>
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