Simple C Tester Support

A VS Code extension that writes all editor source breakpoints to a local JSON file whenever breakpoints change.

Features

• Auto-writes breakpoints on startup and on every breakpoint add/remove/change
• Saves to a configurable folder (default: test_build/breakpoints.json)
• Command Palette commands:
  • Show Breakpoints Output - opens the current breakpoint list in an untitled JSON file
  • Write Breakpoints to File - manually writes breakpoints immediately
• File output is normalized and stable:
  • filepath uses forward slashes (/) on every platform
  • line_number is 1-based
  • entries are sorted by filepath, then line number

Output format

The generated file is a JSON array:

[
  {
    "filepath": "/home/user/projects/app/src/main.c",
    "line_number": 42
  },
  {
    "filepath": "/home/user/projects/app/src/utils.c",
    "line_number": 15
  }
]

Configuration

Example settings.json

{
  "breakpointServer.outputFolderPath": "build/debug"
}

Folder rules

• Must be a relative path
• Must not escape workspace root (.. segments are rejected)
• The output file is always named breakpoints.json within this folder
• Invalid values automatically fall back to test_build

Behavior notes

• The extension uses the first workspace folder as its root
• The file is only written if the configured folder exists and contains a db.json file (acts as a sentinel)
• If no workspace is open, the extension does not write a file and shows a warning
• Writes are serialized internally to avoid race conditions when many breakpoint events fire quickly

Development

npm install
npm run compile

Press F5 in VS Code to launch the Extension Development Host.

Run tests

npm run test

Build .vsix

npm run build

License

MIT