Tess Strickland 34c4e4799d [vm,dyn_modules] Ensure coverage arrays during source reporting.
The original iteration of adding coverage arrays originally eagerly
allocated coverage arrays for bytecode methods with recorded coverage.

Now that these coverage arrays are lazily allocated,
Function::GetCoverageArray() needs to ensure that the appropriate
coverage array has been allocated.  Otherwise, no misses within the
function are recorded in cases where no RecordCoverage instruction in
the method has yet been executed.

TEST=vm/cc/SourceReport_Coverage_UnusedClass_ForceCompile
     pkg/vm_service/test/branch_coverage_test
     pkg/vm_service/test/coverage_async_test
     pkg/vm_service/test/coverage_closure_call_after_optimization_test
     pkg/vm_service/test/coverage_closure_call_test
     pkg/vm_service/test/coverage_instance_call_after_optimization_test
     pkg/vm_service/test/coverage_static_call_after_optimization_test

Cq-Include-Trybots: luci.dart.try:vm-dyn-linux-debug-x64-try
Change-Id: Iff4ddaf583d0f9583bc415142bdee52c046a6712
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/507440
Reviewed-by: Alexander Markov <alexmarkov@google.com>
2026-06-01 10:35:58 -07:00
2026-02-20 05:35:13 -08:00
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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