Tess Strickland
52cfd29cbb
The RecordCoverage instruction has an A/E encoding. The A argument is the type of coverage being recorded, whereas the E argument is the logical index into the coverage array for updating whether that source position has been hit. Also adds new metadata to the bytecode component for the coverage arrays associated with bytecode containing RecordCoverage instructions and a new runtime entry for lazily allocate the coverage array for an interpreted function when needed. The type of coverage is encoded in the RecordCoverage instruction, despite being redundant with the information in the coverage array, so that checking whether that type of coverage is currently enabled at runtime doesn't require either accessing the coverage array (which may be lazily allocated), forcing allocation of the coverage array just to discover that type of coverage is currently disabled, or reading the serialized bytecode component to avoid that forced allocation. ------ Other changes: Source reporting now treats unexecuted interpreted functions when not forcing compilation as if they were uncompiled native functions, so that the source report from running the same code gives the same result whether using the interpreter or the native compiler. Bytecode closures are no longer skipped in source reports. Previously any closure without a context scope was skipped, but bytecode closures don't have those. TEST=vm/cc/SourceReport_Coverage Cq-Include-Trybots: luci.dart.try:vm-dyn-linux-debug-x64-try,vm-aot-dyn-linux-debug-x64-try,vm-aot-dyn-linux-product-x64-try Change-Id: I7557e5dd4c98331c7ca2f5c867dd5f6d03e9d756 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/501520 Reviewed-by: Alexander Markov <alexmarkov@google.com>
Dart
An approachable, portable, and productive language for high-quality apps on any platform
Dart is:
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Approachable: Develop with a strongly typed programming language that is consistent, concise, and offers modern language features like null safety and patterns.
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Portable: Compile to ARM, x64, or RISC-V machine code for mobile, desktop, and backend. Compile to JavaScript or WebAssembly for the web.
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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:
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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.
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Dart Web: For programs targeting the web, Dart Web includes both a development time compiler (dartdevc) and a production time compiler (dart2js).
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.