llvm-project

d6d0ccce - [lldb-mcp] Multiplex across all discovered LLDB instances (#208827)

[lldb-mcp] Multiplex across all discovered LLDB instances (#208827) Connect to every LLDB MCP server advertised under ~/.lldb rather than a single one, and present them to the client as one server. A stale registry entry from a crashed instance simply fails to connect and is skipped. Each instance is identified by the pid of its lldb process, now recorded in the ServerInfo registry file. Tools and resources are addressed with instance-qualified URIs, e.g. lldb-mcp://instance/{pid}/debugger/{id} and lldb://instance/{pid}/debugger/{id}/target/{idx}. Listing requests (sessions_list, resources/list) fan out to every backend and aggregate; targeted requests (command, resources/read) are routed by the pid parsed from the URI. Backends only know their local lldb-mcp://debugger/{id} form, so URIs are rewritten in both directions. Add Binder::FailPendingRequests (and Client::CancelPendingRequests) so that when the client disconnects with a request still in flight to a backend, the abandoned reply is satisfied with an error instead of being destroyed unanswered, which would trip the binder's "must reply" assert. The multiplexer cancels its backends on shutdown before unwinding. Assisted-by: Claude