<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/54552>54552</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [WebAssembly] Use WebAssembly custom sections in C/C++ source files
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          nokotan
      </td>
    </tr>
</table>

<pre>
    All global variables, including ones that have section attribute `__attribute__((section("<section-name>")))`, are located in WebAssembly data sections.

I know that this behavior is required to compatibility of other platforms, and that this is great solution because all data in WebAssembly custom section cannot be loaded into a linear memory.

If you want to embed some metadata into WebAssembly, file scope inline assembly can be used.

```c++
__asm(
  ".section .custom_section.my_section,\"G\",@,abc123\n"
  ".ascii \"my_section is here!\"\n"
);
```

I want global variables, attributed `__attribute__((section(".custom_section.*")))` and never read and written in the program, to be located into WebAssembly custom section.
This may be solution candidate of that llvm-cov is useless with WebAssembly because llvm-cov currently expects that llvm-cov specific sections are located in WebAssembly custom section. (<https://github.com/emscripten-core/emscripten/issues/13046>)
</pre>
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