Can't debug builtin extensions

[roblourens]

• Start the "Renderer and Extension Host" launch config in vscode
• Set a breakpoint in a .ts file in a builtin extension under ./extensions
• It doesn't bind, but I can set breakpoints in the .js files

[roblourens]

So it doesn't load the sourcemaps at all unless they are in outfiles? I thought that is only used for pre-loading.

[connor4312]

We should load at runtime as well. I'll look at that.

[connor4312]

Oh, yea. By default, now for Node we set resolveSourceMapLocations to the outFiles (if it's unset). So because we specified outfiles to use out/**/*.js, js-debug saw the sourcemap for the extension was outside of there and didn't resolve it.

I think this is good behavior, actually. It makes things more deterministic -- if you set a breakpoint, in a file, we know that it will get bound and hit consistently, or it won't. Previously, poor configurations were 'hidden' by the runtime loading -- we'd hit the BP if we were able to load sourcemaps fast enough, but we might miss it sometimes.

[roblourens]

I think that does make sense. If I don't set outFiles, we do the best we can. If I set outFiles and it's wrong, we don't bind breakpoints in files that are missed by outFiles. I like things being deterministic.

[kennyyyb]

I was also having this issue when I upgraded to 1.49.0.

My use case was debugging mocha tests.

The fix for me was to add "outFiles": ["${workspaceFolder}/dist/**/*.js"] to my lauch.json configuration. N.B., my tsconfig.json has "outDir": "dist".

{
  // Use IntelliSense to learn about possible attributes.
  // Hover to view descriptions of existing attributes.
  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
  "version": "0.2.0",
  "configurations": [
    {
      "args": ["--timeout", "999999", "--colors", "${workspaceFolder}/test"],
      "internalConsoleOptions": "openOnSessionStart",
      "name": "Mocha Tests",
      "program": "${workspaceFolder}/node_modules/mocha/bin/_mocha",
      "request": "launch",
      "skipFiles": ["<node_internals>/**"],
      "type": "pwa-node",
      "outFiles": ["${workspaceFolder}/dist/**/*.js"]
    }
  ]
}

As a side note, when I use "Add Configuration" --> "Node.js: Mocha Tests" the config added to launch.json includes: "args": [ "-u", "tdd", "--timeout", "999999", "--colors", "${workspaceFolder}/test" ],

I have to remove the "-u" and the "tdd" for the debug to work.