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[objective_c] Use objc_retainAutoreleasedReturnValue - #3664

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ffigen_retain_autorelease
Sep 21, 2026
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@liamappelbe liamappelbe commented Sep 18, 2026 •

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objc_retainAutoreleasedReturnValue will attempt to promote a recently autoreleased value to a strong reference, reducing the number of references in the autorelease pool. If the reference was not recently autoreleased (presumably it checks the top O(1) refs in the pool's stack), this function behaves the same as objc_retain, so it's a safe drop-in replacement.

  • Blocks still have to use objc_retainBlock, since there's no block equivalent of objc_retainAutoreleasedReturnValue.
  • No FFIgen changes are necessary, since the actual objc_retain calls happen in package:objective_c.
  • For testing, I've removed a bunch of autorelease pools from various ref counting tests, since they're no longer necessary.

Fixes #3653

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Codecov Report

❌ Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 59.40%. Comparing base (eb6ea1e) to head (55b53d6).
⚠️ Report is 1 commits behind head on main.

Files with missing lines Patch % Lines
pkgs/objective_c/lib/src/internal.dart 75.00% 1 Missing ⚠️
Additional details and impacted files

Impacted file tree graph

@@            Coverage Diff             @@
##             main    #3664      +/-   ##
==========================================
+ Coverage   59.30%   59.40%   +0.09%     
==========================================
  Files         307      307              
  Lines       29533    29632      +99     
==========================================
+ Hits        17514    17602      +88     
- Misses      12019    12030      +11     
Flag Coverage Δ
ffigen 91.29% <ø> (-0.03%) ⬇️
native_pkgs_macos 81.09% <ø> (ø)
native_pkgs_ubuntu 79.38% <ø> (ø)
native_pkgs_windows 83.66% <ø> (ø)
objective_c 63.04% <75.00%> (-0.01%) ⬇️
swiftgen 80.80% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Components Coverage Δ
code_assets 90.99% <ø> (ø)
data_assets 80.95% <ø> (ø)
ffi 92.19% <ø> (ø)
ffigen 91.39% <ø> (-0.03%) ⬇️
hooks 73.89% <ø> (ø)
hooks_runner 88.56% <ø> (ø)
jni 11.89% <ø> (ø)
jni_flutter ∅ <ø> (∅)
jni_util ∅ <ø> (∅)
jnigen 82.77% <ø> (ø)
json_syntax_generator ∅ <ø> (∅)
native_test_helpers 71.42% <ø> (ø)
native_toolchain_c 92.85% <ø> (ø)
objective_c 79.47% <75.00%> (-0.07%) ⬇️
pub_formats ∅ <ø> (∅)
record_use 78.83% <ø> (ø)
swift2objc 92.95% <ø> (ø)
swiftgen 80.80% <ø> (ø)
test_case_selector 97.28% <ø> (ø)
Files with missing lines Coverage Δ
...ib/src/code_generator/objc_built_in_functions.dart 96.41% <ø> (ø)
pkgs/objective_c/lib/src/internal.dart 64.95% <75.00%> (+0.02%) ⬆️

... and 2 files with indirect coverage changes

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@liamappelbe
liamappelbe merged commit b66dfde into main Sep 21, 2026
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@liamappelbe
liamappelbe deleted the ffigen_retain_autorelease branch September 21, 2026 00:27
copybara-service Bot pushed a commit to dart-lang/sdk that referenced this pull request Sep 22, 2026
Revisions updated by `dart tools/rev_sdk_deps.dart`.

dartdoc (https://github.com/dart-lang/dartdoc/compare/df2f2cd..c68debc):
  c68debcb  Mon Sep 21 11:07:33 2026 +0200  Sarah Zakarias  Adapt the {@example} code fence to the example content (dart-lang/dartdoc#4285)

ecosystem (https://github.com/dart-lang/ecosystem/compare/1bdafd8..16dca7a):
  16dca7a  Mon Sep 21 08:04:10 2026 -0700  Kevin Moore  fix(firehose): keep dart_apitool crash details in logs and sanitize breaking table row (dart-lang/ecosystem#461)

http (https://github.com/dart-lang/http/compare/35769ba..d8e8e9c):
  d8e8e9c  Mon Sep 21 18:26:27 2026 +0900  DubaiChewyCookie  fix(http2): bound peer-controlled streams and headers (dart-lang/http#1958)
  286037b  Thu Sep 17 17:12:02 2026 -0700  Brian Quinlan  chore(http2): prepare to release 3.1.0 (dart-lang/http#1987)
  a067c94  Wed Sep 16 15:57:52 2026 -0700  Brian Quinlan  fix(cupertino_http): possible URLRequest memory leaks (dart-lang/http#1989)
  0d15438  Thu Sep 17 00:43:43 2026 +0300  Ellet  chore(ok_http): Built-in Kotlin and resolve AGP 9 warnings (dart-lang/http#1973)

native (https://github.com/dart-lang/native/compare/a88aaaf..f628b26):
  f628b26f0  Mon Sep 21 23:21:05 2026 +0200  Daco Harkes  [hooks] Add unit tests for `ProtocolExtension` defaults and `build`/`link` error paths (dart-lang/native#3668)
  474a93f39  Mon Sep 21 08:01:13 2026 +0500  Muhammad Anas Naveed  [jni][jnigen] Update Groovy Gradle property assignments (dart-lang/native#3678)
  4434b7f3c  Mon Sep 21 10:31:09 2026 +1000  Liam Appelbe  [jni] Ignore coverage of generated files (dart-lang/native#3665)
  b66dfdeae  Mon Sep 21 10:27:27 2026 +1000  Liam Appelbe  [objective_c] Use `objc_retainAutoreleasedReturnValue` (dart-lang/native#3664)
  541121b4b  Fri Sep 18 17:30:03 2026 +0200  Daco Harkes  [record_use] Add status and coverage badges to `README.md` (dart-lang/native#3675)
  b97663824  Fri Sep 18 17:25:10 2026 +0200  Daco Harkes  [hooks] Prepare `prebuilt_assets_example` v0.1.2 for release (dart-lang/native#3672)
  876145f0c  Fri Sep 18 15:23:34 2026 +0200  Daco Harkes  [hooks] Use `prebuilt/` instead of `assets/` in `prebuilt_assets_example` (dart-lang/native#3671)
  73bd0b7b3  Fri Sep 18 12:58:36 2026 +0200  Daco Harkes  [hooks] Prepare `prebuilt_assets_example` v0.1.1 for release (dart-lang/native#3669)
  4e0f1983f  Fri Sep 18 11:40:30 2026 +0200  Daco Harkes  [hooks] Add example for bundling prebuilt assets in `pub publish` (dart-lang/native#3637)
  22d7cf8da  Fri Sep 18 09:28:25 2026 +0200  Daco Harkes  [native_test_helpers] Add unit tests for `yamlToJson` and `findPackageRoot` (dart-lang/native#3662)
  74e631a8b  Fri Sep 18 09:28:25 2026 +0200  Daco Harkes  [hooks] Add unit tests for `link` API and `MetadataAsset` (dart-lang/native#3661)
  3428cb968  Fri Sep 18 09:28:24 2026 +0200  Daco Harkes  [data_assets] Add unit tests for `LinkOutput` data asset extensions (dart-lang/native#3660)
  0e4eea612  Fri Sep 18 09:28:24 2026 +0200  Daco Harkes  [code_assets] Add unit tests for `testCodeBuildHook` and `CCompilerConfig` (dart-lang/native#3659)
  dc44c5383  Fri Sep 18 09:28:24 2026 +0200  Daco Harkes  [ffi] Add unit tests for `Arena` error handling and `malloc.free` (dart-lang/native#3658)
  1e1e2fb8a  Fri Sep 18 09:28:23 2026 +0200  Daco Harkes  [native_toolchain_c] Default `linkerOptions` in `CLinker.run` and add `CLibrary` tests (dart-lang/native#3657)
  f3c066006  Fri Sep 18 09:28:23 2026 +0200  Daco Harkes  [data_assets] [hooks] [hooks_runner] [record_use] Add coverage ignore comments for debug methods (dart-lang/native#3656)
  59cd44422  Fri Sep 18 09:28:22 2026 +0200  Daco Harkes  [infra] Clean coverage directory and enable `--check-ignore` in `tool/ci.dart` (dart-lang/native#3655)
  b859d5fa8  Fri Sep 18 09:35:46 2026 +0500  Muhammad Anas Naveed  [ffigen] Default compiler options for C++ (dart-lang/native#3645)
  eb6ea1e56  Thu Sep 17 09:28:38 2026 +1000  Liam Appelbe  [ffigen][jnigen] More docs (dart-lang/native#3649)
  da786131c  Thu Sep 17 09:06:20 2026 +1000  Liam Appelbe  [ffigen][jnigen] YAML migration skills (dart-lang/native#3648)
  fc0491997  Wed Sep 16 15:37:19 2026 -0700  Brian Quinlan  [objective_c] don't use autorelease for `toNSDate` (dart-lang/native#3650)
  f7f9a4556  Wed Sep 16 17:32:47 2026 +0200  Daco Harkes  [code_assets] [hooks_runner] [native_toolchain_c] Prepare for release (dart-lang/native#3642)
  1c60c437c  Wed Sep 16 13:40:31 2026 +0200  Daco Harkes  [hooks_runner] Restore non-breaking `KernelAssetPath.toJson` and add `toJsonForTarget` (dart-lang/native#3643)
  7667162b3  Wed Sep 16 11:46:18 2026 +0200  Daco Harkes  [infra] Use `dependency_validator` in `tool/ci.dart` (dart-lang/native#3646)
  f6d153d01  Tue Sep 15 19:32:08 2026 -0700  Brian Quinlan  [objective_c] Fix potential leaks in converts (dart-lang/native#3647)
  cb2c62331  Wed Sep 16 11:32:42 2026 +1000  Liam Appelbe  [ffigen] Remove YAML from readmes (dart-lang/native#3633)
  22e835728  Wed Sep 16 09:49:02 2026 +1000  Liam Appelbe  [jnigen] Remove yaml from readme (dart-lang/native#3634)
  eb444eee2  Wed Sep 16 09:48:04 2026 +1000  Liam Appelbe  [infra] Add and fix `unawaited_futures` and `discarded_futures` lints (dart-lang/native#3639)
  0f419f0d2  Wed Sep 16 09:47:44 2026 +1000  Liam Appelbe  [infra] Switch from coveralls to codecov (dart-lang/native#3626)

shelf (https://github.com/dart-lang/shelf/compare/f36dd68..e5c8dc6):
  e5c8dc6  Tue Sep 15 18:15:41 2026 -0700  Kevin Moore  fix(shelf_static): ignore suffix ranges selecting zero bytes (dart-lang/shelf#541)

test (https://github.com/dart-lang/test/compare/c80d53d..9946c95):
  9946c955  Mon Sep 21 12:31:54 2026 -0700  Nate Bosch  Fix a race in the frontend server client fake (dart-lang/test#2762)
  48c3fdf6  Fri Sep 18 18:52:52 2026 -0700  Nate Bosch  Fix race conditions during test load (dart-lang/test#2761)
  5d74864b  Fri Sep 18 16:25:57 2026 -0700  Nate Bosch  Remove mentions of Travis (dart-lang/test#2760)
  5c4d9b25  Fri Sep 18 12:49:00 2026 -0700  Nate Bosch  Use consistent *Checks naming for prints (dart-lang/test#2759)
  f927df26  Fri Sep 18 12:15:49 2026 -0700  Kevin Moore  feat(checks): add prints expectations (`#2742`) (dart-lang/test#2743)
  347a5af2  Fri Sep 18 12:09:15 2026 -0700  Nate Bosch  Add an example for every matcher (dart-lang/test#2757)
  6358dbb3  Thu Sep 17 15:10:08 2026 -0700  Nate Bosch  Add an example for every checks expectation, and fix the bugs they exposed (dart-lang/test#2756)
  88202adc  Thu Sep 17 14:13:30 2026 +0200  Sigurd Meldgaard  New flag --shard-by-suite

tools (https://github.com/dart-lang/tools/compare/1b0c3bb..3614ce0):
  3614ce06  Fri Sep 18 10:07:20 2026 -0700  Kevin Moore  chore(unified_analytics): remove dart:mirrors usage in test/event_test.dart (dart-lang/tools#2602)
  7550ce13  Fri Sep 18 07:56:44 2026 -0700  Kevin Moore  chore(markdown): remove dart:mirrors usage in tool/stats_lib.dart (dart-lang/tools#2600)

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Change-Id: Ide262779269adab780d314d80c9f82b97a79391f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/552741
Commit-Queue: Nate Bosch <[email protected]>
Reviewed-by: Brian Quinlan <[email protected]>
liamappelbe added a commit that referenced this pull request Sep 23, 2026
Hassnaa9 pushed a commit to Hassnaa9/native that referenced this pull request Sep 27, 2026
Hassnaa9 pushed a commit to Hassnaa9/native that referenced this pull request Sep 27, 2026
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[ffigen] Use objc_retainAutoreleasedReturnValue

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