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dart / sdk / 9d97eaac1df4942f18fb7dbaac858c5767570ecf
commit9d97eaac1df4942f18fb7dbaac858c5767570ecf[log] [tgz]
authorMartin Kustermann <kustermann@google.com>Fri May 15 13:14:18 2020 +0200
committerAlexander Thomas <athom@google.com>Tue May 26 18:33:04 2020 +0200
treeebb093a57c26fc6505a9a4536ff871a1248b2cb5
parentc062b178f5c8931bd81459fde8eb5aa2860fed50 [diff]
[vm] Fix instance hash calculation to accommodate unboxed fields during cross compilation.

Instance hash calculation on host and on target should produce same
results(like when you use simarm_x64/gen_snapshot to produce arm snapshot).
It was not producing same results because of how unboxed fields could be
taking more than one word(on 32-bit arm they are taking two words).
Hash calculation was done in terms of words so simarm_x64/gen_snapshot
saw one word unboxed field, but same calculation saw two words.

The fix is to pay special attention when iterating over unboxed field
during hash calculation and accommodate host and target word size
difference.

Fixes https://github.com/dart-lang/sdk/issues/41824.

Change-Id: I42ee692fc297032e0ea1653e4e37381f63324d3d
2 files changed
tree: ebb093a57c26fc6505a9a4536ff871a1248b2cb5
  1. .dart_tool/
  2. .github/
  3. benchmarks/
  4. build/
  5. client/
  6. docs/
  7. pkg/
  8. runtime/
  9. samples/
  10. samples-dev/
  11. sdk/
  12. sdk_nnbd/
  13. tests/
  14. third_party/
  15. tools/
  16. utils/
  17. .clang-format
  18. .gitattributes
  19. .gitconfig
  20. .gitignore
  21. .gn
  22. .mailmap
  23. .packages
  24. .style.yapf
  25. .vpython
  26. AUTHORS
  27. BUILD.gn
  28. CHANGELOG.md
  29. codereview.settings
  30. CONTRIBUTING.md
  31. DEPS
  32. LICENSE
  33. PATENT_GRANT
  34. PRESUBMIT.py
  35. README.dart-sdk
  36. README.md
  37. sdk_args.gni
  38. WATCHLISTS
README.md

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).

Dart platforms illustration

License & patents

Dart is free and open source.

See LICENSE and PATENT_GRANT.

Using Dart

Visit the dart.dev to learn more about the language, tools, getting started, and more.

Browse pub.dev for more packages and libraries contributed by the community and the Dart team.

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.