[vm] Add Native->VM transitions when dereferencing API handles.

For example setting return value unwraps handles and stores
raw pointer values to the stack which might race with GC
in another thread.

This CL adds assertions in helper methods from Api class which
unwrap API handles and fixes all places that were revealed by
those assertions.

Caveat: we still permit to check whether handle contains
Smi or not without entering VM state - because GC does not
change this property.

Bug: b/127482366
Change-Id: I59f08c2a91935995514fb70607c2777aa2844d94
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/95654
Commit-Queue: Siva Annamalai <asiva@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
10 files changed
tree: beb43aaf585250721cb0732ae448853bc9d141a2
  1. .github/
  2. build/
  3. client/
  4. docs/
  5. pkg/
  6. runtime/
  7. samples/
  8. samples-dev/
  9. sdk/
  10. tests/
  11. third_party/
  12. tools/
  13. utils/
  14. .clang-format
  15. .gitattributes
  16. .gitconfig
  17. .gitignore
  18. .gn
  19. .mailmap
  20. .packages
  21. .vpython
  22. AUTHORS
  23. BUILD.gn
  24. CHANGELOG.md
  25. codereview.settings
  26. CONTRIBUTING.md
  27. DEPS
  28. LICENSE
  29. PATENTS
  30. PRESUBMIT.py
  31. README.dart-sdk
  32. README.md
  33. WATCHLISTS
README.md

Dart

Dart is an open-source, scalable programming language, with robust libraries and runtimes, for building web, server, and mobile apps.

Using Dart

Visit the dartlang.org to learn more about the language, tools, getting started, and more.

Browse pub.dartlang.org 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.

There are more documents on our wiki.

Contributing to Dart

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You can also contribute patches, as described in Contributing.

License & patents

See LICENSE and PATENTS.