SyzLang

Syntax highlighting and language server for syzkaller syscall descriptions

• Full syzlang grammar — include, incdir, define, meta, resource, type aliases/templates, struct/union blocks, flags, syscall definitions with variants
• Syzconst grammar — extracted constants (.const, .txt.const) and warnings (.txt.warn)
• Language server — go-to-definition, find references, hover info, autocomplete, document symbols, and diagnostics
• Dark and light themes — optimized color palettes for Dark+, Dark Modern, Light+, and Light Modern
• Fully customizable — every token color is overridable via editor.tokenColorCustomizations

Note: Syzkaller stores descriptions as plain .txt files under sys/<os>/. The extension auto-associates **/sys/**/*.txt with syzlang via files.associations. You can adjust or disable this in your settings.json.

1. Install from the VS Code Marketplace or search "Syzlang" in the Extensions panel
2. Open any .syz file or a syzkaller sys/ directory
3. Syntax highlighting, hover info, and diagnostics activate automatically

Use these scopes to customize colors in editor.tokenColorCustomizations.textMateRules:

Override any color in your settings.json:

{
    "editor.tokenColorCustomizations": {
        "textMateRules": [
            {
                "scope": "entity.name.function.syscall.syzlang",
                "settings": { "foreground": "#FFD700", "fontStyle": "bold" }
            }
        ]
    }
}

The extension registers **/sys/**/*.txt as syzlang by default. If this conflicts with other .txt files in your workspace, narrow or override it:

{
    "files.associations": {
        "**/sys/**/*.txt": "syzlang",
        "**/my-other-dir/**/*.txt": "plaintext"
    }
}

make install        # install dependencies
make build          # build extension
make lint           # type-check + eslint
make format         # format with prettier
make package        # build + package .vsix
make ci             # full CI pipeline

• syzkaller — the kernel fuzzer that uses syzlang
• Syscall descriptions syntax — official syzlang documentation
• syzlang-vscode-ext — an earlier syzlang highlighter

MIT