[beta] [vm/debugger] Use safepoint-safe RwLock for breakpoint locations locks and Ensure setting breakpoints is lock-safe. Acquire reload opreation scope when deoptimizing the world to ensure locks can be acquired for compilation. Set up scope for operations that can be run while the world is deoptimized and stopped to avoid races. Ensure code stays unoptizimed when single stepping, prevent other isolates to reoptimize it. Fixes: https://github.com/dart-lang/sdk/issues/54650 https://github.com/flutter/flutter/issues/140878 TEST=DartAPI_BreakpointLockRace and DeoptimizeFramesWhenSettingBreakpoint Bug: https://github.com/dart-lang/sdk/issues/54650 and https://github.com/flutter/flutter/issues/140878 Cherry-pick: https://dart-review.googlesource.com/c/sdk/+/347420 and https://dart-review.googlesource.com/c/sdk/+/345743 Cherry-pick-request: https://github.com/dart-lang/sdk/issues/54699 Change-Id: Ia4bc883121dac978fbb76027906a810000ef1138 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/347760 Reviewed-by: Alexander Aprelev <aam@google.com> Commit-Queue: Siva Annamalai <asiva@google.com>
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 is free and open source.
See LICENSE and PATENT_GRANT.
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).
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 on our wiki.
The easiest way to contribute to Dart is to file issues.
You can also contribute patches, as described in Contributing.