|author||Martin Kustermann <email@example.com>||Wed May 22 01:23:46 2019 +0000|
|firstname.lastname@example.org <email@example.com>||Wed May 22 01:23:46 2019 +0000|
[vm/kernel] Use GC-tracked ExternalTypedData/TypedDataView for kernel buffers Until now we often leaked kernel buffers (e.g. hot reload buffers) because various objects were referencing ExternalTypedData objects pointing into the middle of c-allocated memory. This made it impossible for the GC to determine when the last reference is gone. This CL ensures that the actual buffers are *always* made available via ExternalTypedData and any inner pointers into it are created via TypedDataViews. The embedder guarantees to the free kernel buffers it has provided to: - Dart_CreateIsolateFromKernel - Dart_LoadScriptFromKernel - Dart_LoadLibraryFromKernel - Dart_SetDartLibrarySourcesKernel on isolate shutdown. All other kernel buffers will get a finalizer attached, which ensures the kernel buffers get freed by the GC once they are no longer referenced: - Kernel blobs for expression evaluation - Kernel blobs for Hot-Reload - Kernel blobs for cc tests Fixes https://github.com/dart-lang/sdk/issues/33973 Fixes https://github.com/dart-lang/sdk/issues/36857 Issue https://github.com/dart-lang/sdk/issues/37030 Change-Id: I1cc410c94c0f4b229413e793728a261afcb10aaf Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/103130 Reviewed-by: Ryan Macnak <firstname.lastname@example.org> Commit-Queue: Martin Kustermann <email@example.com>
Optimized for UI: Develop with a programming language specialized around the needs of user interface creation
Productive: Make changes iteratively: use hot reload to see the result instantly in your running app
Dart has 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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