| commit | 1e3fb80199d5605cb356ca45b09937c5df20246c | [log] [tgz] |
|---|---|---|
| author | Nate Biggs <natebiggs@google.com> | Wed Aug 07 17:27:38 2024 +0000 |
| committer | Commit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com> | Wed Aug 07 17:27:38 2024 +0000 |
| tree | 6d7edca738f0b52a81c8832612e221743e7794f7 | |
| parent | 788d7263c626a9d2e33818e3277d8b0b0ac7b557 [diff] |
[dart2wasm] Modify wasm_builder to support multi-module deferred loading (1/2). None of these changes modify the generated wasm in any way yet. But all these changes allow dart2wasm to generate multiple modules to implement deferred loading and eventually dynamic modules. 1) Exposes tag export functionality. This functionality is supported by the exception handling spec/proposal but just wasn't added to wasm_builder originally: https://github.com/WebAssembly/exception-handling/blob/main/proposals/exception-handling/Exceptions.md The exception tag needs to be exported from the main module and then imported into subsequent modules so that exception handling works in a multi-module environment. 2) Support updates to imported tables via the element section. The element section provides an easy way to assign functions to indices in a table. This assignment can be applied to either a defined table or an imported table. wasm_builder only supported tracking element assignments for defined tables but deferred loading will make use of imported tables to which we will also want to assign functions. Change-Id: If23fbbb1e60a67d80d11924aaa718c50e68ecb98 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/378840 Reviewed-by: Martin Kustermann <kustermann@google.com> Reviewed-by: Ömer Ağacan <omersa@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).
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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.
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If you want to build Dart yourself, here is a guide to getting the source, preparing your machine to build the SDK, and building.
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