lldb-mi failed to locate lldb-server-10.0.0

[Entoryvekum]

When debugging applications lldb-mi report error “process launch failed: unable to locate lldb-server-10.0.0”.

Environment:
Ubuntu 20.04 LTS on WSL2
LLVM 10.0
Clang 10.0.0
LLDB 10.0.0

[jez]

I'm seeing the same problem. I haven't found a workaround yet.

[jez]

I was able to work around this by explicitly setting

export LLDB_DEBUGSERVER_PATH=/usr/bin/lldb-server-11

(for me, the error was "unable to locate lldb-server-11.1.0"—you might want to replace this with wherever you have lldb-server on your system, which is probably lldb-server-10 or lldb-server-10.0.0)

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I found that by working backwards from where that error is raised in the LLDB source code:

https://github.com/llvm/llvm-project/blob/1fdec59bffc11ae37eb51a1b9869f0696bfd5312/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp#L1212

I don't believe this setting is documented anywhere except in the source code.

Looking at the source code might be a way to find out what the root cause is (presumably lldb-mi should be able to find lldb-server in most cases, so I'm not sure what's holding it back and reading the source might answer that).

[tkrasnukha]

LLDB uses dladdr function to discover the path to liblldb and looks there for lldb-server. However, sometimes this function returns the path to the executable that loaded liblldb (see section BUGS of the function's man). Since lldb-server is located in the same directory as lldb executable, it works fine. If you move lldb to another directory, you'll have the same error, I think.

I updated Readme with LLDB_DEBUGSERVER_PATH workaround. Close this issue as it is not an lldb-mi bug.