3669086a40
In AOT we can have unboxed fields that will not be visited by GC
visitors and as such are also not reported as <obj>.references when
producing heap snapshots.
Though the heapsnapshot's <class>.fields will contain entries
for unboxed fields, which causes the fields index calculation to be
incorrect.
This can cause various confusing things, e.g. incorrectly caluclated
retaining paths, since the <class>.fields.index doesn't match the
index in <obj>.references.
To fix this this CL will change the visiting code to emit dummy
references for unboxed fields.
The written test uncovered a few other issues:
- report type_arguments and native_fields in <class>.fields
=> the visitors already visit those fields
- fix `Class::next_{host,target}_field_offset` for classes
with native fields
=> this will also shrink size of `NativeWrapperClass` subclasses
- ensure classes with vm-defined layout are finalized
=> we assume objects should only exist in heap if their class
is finalized
- fix `FfiNativeFunction` type_argument offset
- fixes for object fields list
=> add missing entries, fix existing entries
Fixes https://github.com/dart-lang/sdk/issues/49711
TEST=vm/dart{,_2}/heap_snapshot_regress_49711_test
Change-Id: I8e25680b2c0c8c49caafbb8da57b0b6419e89c4f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/255814
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>
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| benchmarks | ||
| build | ||
| docs | ||
| pkg | ||
| runtime | ||
| samples | ||
| samples-dev | ||
| sdk | ||
| tests | ||
| third_party | ||
| tools | ||
| utils | ||
| .clang-format | ||
| .gitattributes | ||
| .gitconfig | ||
| .gitignore | ||
| .gn | ||
| .mailmap | ||
| .style.yapf | ||
| .vpython | ||
| AUTHORS | ||
| BUILD.gn | ||
| CHANGELOG.md | ||
| codereview.settings | ||
| CONTRIBUTING.md | ||
| DEPS | ||
| LICENSE | ||
| OWNERS | ||
| PATENT_GRANT | ||
| PRESUBMIT.py | ||
| README.dart-sdk | ||
| README.md | ||
| sdk_args.gni | ||
| SECURITY.md | ||
| WATCHLISTS | ||
Dart
A client-optimized language for fast apps on any platform
Dart is:
-
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.
-
Fast on all platforms: Compile to ARM & x64 machine code for mobile, desktop, and backend. Or compile to JavaScript for the web.
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).
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 on our wiki.
Contributing to Dart
The easiest way to contribute to Dart is to file issues.
You can also contribute patches, as described in Contributing.