Swift support with `codelldb`: need to set `lldb_library` in SublimeDebugger preferences?

[peterkos]

Morning!

I was struggling to attach lldb to a SwiftPM-built project (sourcekit-lsp, of course) with the following config:

"debugger_configurations":[{
    "type": "lldb",
    "request": "attach",
    "name": "Attach",
    "program": "${folder}/.build/arm64-apple-macosx/debug/sourcekit-lsp",
    "waitFor": true,
    "lldb.library": "/Applications/Xcode.app/Contents/SharedFrameworks/LLDB.framework/Versions/A/LLDB",
    "lldb.verboseLogging": true
}]

(Opting for A over the /Current/ symlink, and targeting the macos SPM debug output)

After much hoopla, I found a teeny little setting in Debugger.sublime-settings that overrides the debugger configurations!

https://github.com/daveleroy/SublimeDebugger/blob/95b7098d6d432e38b847bd1d42c525186e4e64f8/Debugger.sublime-settings#L57-L58

In fact -- codelldb, contrary to its Swift documentation, doesn't need to have lldb.library set in this case, because of this setting. Nor does it need LLDB_DEBUGSERVER_PATH as a lldb.launch.env 😅

Working config:

// sourcekit-lsp.sublime-project
"debugger_configurations":[{
    "type": "lldb",
    "request": "attach",
    "name": "Attach",
    "program": "${folder}/.build/arm64-apple-macosx/debug/sourcekit-lsp",
    "waitFor": true,
    "lldb.verboseLogging": true
}]
// Debugger.sublime-settings
{
    "lldb_library": "/Applications/Xcode.app/Contents/SharedFrameworks/LLDB.framework/Versions/A/LLDB",
}

Maybe a callout in the README for this setting would be helpful? I'd normally throw it in codelldb, but that's VSCode specific :eyes: Happy to add one wherever!

[peterkos]

The "symptom" here was hitting breakpoints, but unable to print any vars in the console, and the callstack was obfuscated, like so:

s18SKSwiftPMWorkspace05SwiftB0C3url17toolchainRegistry10buildSetupACSg10Foundation3URLV_6SKCore09ToolchainF0CAK05BuildH0VtcfC

Attempting to print a var would yield this fun error, informing us (tldr) that lldb wasn't loaded, + we're runnin' only the debug symbols from the executable:

:po buildSetup
error: Could not find type system for language swift: TypeSystem for language swift doesn't exist

[daveleroy]

Does lldb.library in the configuration work in vsocde? I was under the impression that was a workspace setting similar to Debugger.sublime-preferences.

There currently isn't a great place to add notes for specific adapters besides the readme