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thebrowsercompany / windows-samples

Sample Apps for Swift on Windows
MIT License
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`print` doesn't work when running app via LLDB (via VSCode) #11

Closed oskargargas closed 9 months ago

oskargargas commented 10 months ago

Have some time to play with Swift on Windows during Christmas. Managed to get app start from VSCode. Can debug it via LLDB. But there still is one minor annoyance. When I run app using LLDB there is no stdout/print output. It is visible if I run binary directly from terminal so I know that everything compiles correctly. The problem is with LLDB or lunch configuration.

Launch config:

{
  "type": "lldb",
  "request": "launch",
  "name": "lldb",
  "program": "${workspaceFolder}/build/bin/${workspaceFolderBasename}",
  "args": [],
  "cwd": "${workspaceFolder}",
  "preLaunchTask": "Build"
}

CodeLLDB LLDB library path: C:\Users\xxx\AppData\Local\Programs\Swift\Toolchains\0.0.0+Asserts\usr\bin\liblldb.dll

I use a workaround - build, run from command line, attach debugger using separate task. It's usable but would be nicer if it was single keystroke.

{
  "name": "attach lldb",
  "type": "lldb",
  "request": "attach",
  "program": "${workspaceFolder}/build/bin/${workspaceFolderBasename}"
}
stevenbrix commented 9 months ago

yeah this is a known issue with swift, you need to follow the print up with an fflush(stdout)