Jinho Seo 046fc17e53 This change hardens DTD FileSystemService workspace-root enforcement against symlink escapes.
Previously, FileSystem.readFileAsString, writeFileAsString, and
listDirectoryContents only validated the requested path textually against the
configured IDE workspace roots. A symlink inside the workspace could
therefore resolve to a location outside the workspace and still be accessed.

This patch resolves workspace roots and requested filesystem targets before
performing the authorization check, and resolves the nearest existing ancestor
for write targets so new files inside a workspace continue to work.

It also adds a source-backed regression test in pkg/dtd_impl/test/dtd_test.dart
that verifies read, write, and directory listing requests through a symlink
escaping the workspace all fail with permission denied.

R=bquinlan@google.com

Tested:
- HOME=/tmp XDG_CONFIG_HOME=/tmp DART_SUPPRESS_ANALYTICS=1 /tmp/dart-sdk-3.12.0-221.0.dev/dart-sdk/bin/dart test pkg/dtd_impl/test/dtd_test.dart
Change-Id: I7abf00f6220bff42b352e2942f396167af53adb8
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/493420
Reviewed-by: Jessy Yameogo <yjessy@google.com>
Auto-Submit: 진호 <orangemush777@gmail.com>
Reviewed-by: Ben Konyi <bkonyi@google.com>
Commit-Queue: Ben Konyi <bkonyi@google.com>
2026-04-08 10:13:43 -07:00
2026-02-19 13:25:23 -08:00
2026-04-08 02:45:57 -07:00
2026-02-20 05:35:13 -08:00
2026-03-19 01:25:57 -07:00
2026-03-04 18:41:25 -08:00
2025-03-10 03:22:36 -07:00

Dart

An approachable, portable, and productive language for high-quality apps on any platform

Dart is:

  • Approachable: Develop with a strongly typed programming language that is consistent, concise, and offers modern language features like null safety and patterns.

  • Portable: Compile to ARM, x64, or RISC-V machine code for mobile, desktop, and backend. Compile to JavaScript or WebAssembly for the web.

  • Productive: Make changes iteratively: use hot reload to see the result instantly in your running app. Diagnose app issues using DevTools.

Dart's flexible compiler technology lets you run Dart code in different ways, depending on your target platform and goals:

  • Dart Native: For programs targeting devices (mobile, desktop, server, and more), Dart Native includes both a Dart VM with JIT (just-in-time) compilation and an AOT (ahead-of-time) compiler for producing machine code.

  • Dart Web: For programs targeting the web, Dart Web includes both a development time compiler (dartdevc) and a production time compiler (dart2js).

Dart platforms illustration

License & patents

Dart is free and open source.

See LICENSE and PATENT_GRANT.

Using Dart

Visit dart.dev to learn more about the language, tools, and to find codelabs.

Browse pub.dev for more packages and libraries contributed by the community and the Dart team.

Our API reference documentation is published at api.dart.dev, based on the stable release. (We also publish docs from our beta and dev channels, as well as from the primary development branch).

Building Dart

If you want to build Dart yourself, here is a guide to getting the source, preparing your machine to build the SDK, and building.

There are more documents in our repo at docs.

Contributing to Dart

The easiest way to contribute to Dart is to file issues.

You can also contribute patches, as described in Contributing.

Roadmap

Future plans for Dart are included in the combined Dart and Flutter roadmap on the Flutter wiki.

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