<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/139025>139025</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [lldb] - Send startDebugging request on fork
        </td>
    </tr>

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

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

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

<pre>
    This is a follow on from both:
- https://github.com/llvm/llvm-project/issues/127952
- https://github.com/vadimcn/codelldb/issues/317

LLDB supports both [follow-fork-mode](https://github.com/llvm/llvm-project/commit/4a2a947317bf702178bf1af34dffd0d280d49970) and the dap-based [startDebuggingRequest](https://github.com/llvm/llvm-project/commit/227b2180eb2be94986d63c75c144f88be13fc52f). However it doesn’t look like a request is sent back to the debug client if a fork or vfork happens. This would allow the client to attach to the child process.

My thinking is, even if following the parent is selected, a startDebugging request would be sent to the client, so a new debug session can be attached to the child process, and the client can debug both processes. This would be a cleaner setup that trying to support multi process debugging.

CC @jimingham @mgorny 
</pre>
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