[ DDS ] Rework client resume permissions API

This change reworks the client resume permissions API to make it easier
for clients to deal with user provided `--pause-isolates-on-start` and
`--pause-isolates-on-exit` flags.

`requireUserPermissionToResume` should be called by the tool that
launches the Dart process to indicate whether or not the user provided
`--pause-isolates-on-{start,exit}`. The default behavior is to assume
that a tool set these flags for its own use (e.g., resetting breakpoints
after a hot restart in Flutter), where isolates will resume immediately
after each client that has indicated interest in that pause event has
invoked `readyToResume`.

If a user provided one of the previously mentioned flags, isolates will
not immediately resume after each relevant client has invoked
`readyToResume`. Instead, a call to `resume()` must be made to indicate
the user has triggered the resume request instead of tooling. If the
user permissions to resume are changed while the isolate is paused and
all relevant clients have invoked `readyToResume`, the isolate will
automatically resume if the user no longer requires us to wait for a
user resume.

`resume()` now also acts as a "force resume", bypassing any required
permissions set by tooling.

This behavior change is breaking, so the DDS protocol version is being
bumped to 2.0.

`package:dds_service_extensions` has also been updated to include the
following DDS RPCs:

 - `requireUserPermissionToResume`
 - `readyToResume`

Change-Id: Id5f0806b3c56507d39eb00b6305b8896bab13ae7
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/357420
Reviewed-by: Elliott Brooks <elliottbrooks@google.com>
Commit-Queue: Ben Konyi <bkonyi@google.com>
22 files changed
tree: bcc76a3ef9c00b9cce86ab64193d2b9ab1ed374e
  1. .dart_tool/
  2. .github/
  3. benchmarks/
  4. build/
  5. docs/
  6. pkg/
  7. runtime/
  8. samples/
  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. .style.yapf
  21. AUTHORS
  22. BUILD.gn
  23. CHANGELOG.md
  24. codereview.settings
  25. CONTRIBUTING.md
  26. DEPS
  27. LICENSE
  28. OWNERS
  29. PATENT_GRANT
  30. PRESUBMIT.py
  31. README.dart-sdk
  32. README.md
  33. sdk.code-workspace
  34. sdk_args.gni
  35. SECURITY.md
  36. WATCHLISTS
README.md

Dart

An approachable, portable, and productive language for high-quality apps on any platform

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).

Dart platforms illustration

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See LICENSE and PATENT_GRANT.

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