[canvaskit] Fix debug build for CanvasKit #162198

harryterkelsen · 2025-01-24T21:39:02Z

Fixes the debug build for CanvasKit.

NOTE: We need to build the debug WASM build with -O1 because building with -O0 causes Emscripten to produce a binary that is rejected by Chrome for having functions with too many local variables. Building with -O1 optimizes those locals out.

Pre-launch Checklist

I read the Contributor Guide and followed the process outlined there for submitting PRs.
I read the Tree Hygiene wiki page, which explains my responsibilities.
I read and followed the Flutter Style Guide, including Features we expect every widget to implement.
I signed the CLA.
I listed at least one issue that this PR fixes in the description above.
I updated/added relevant documentation (doc comments with ///).
I added new tests to check the change I am making, or this PR is test-exempt.
I followed the breaking change policy and added Data Driven Fixes where supported.
All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel on Discord.

flutter-dashboard · 2025-01-24T21:39:06Z

It looks like this pull request may not have tests. Please make sure to add tests before merging. If you need an exemption, contact "@test-exemption-reviewer" in the #hackers channel in Discord (don't just cc them here, they won't see it!).

If you are not sure if you need tests, consider this rule of thumb: the purpose of a test is to make sure someone doesn't accidentally revert the fix. Ask yourself, is there anything in your PR that you feel it is important we not accidentally revert back to how it was before your fix?

Reviewers: Read the Tree Hygiene page and make sure this patch meets those guidelines before LGTMing. The test exemption team is a small volunteer group, so all reviewers should feel empowered to ask for tests, without delegating that responsibility entirely to the test exemption group.

eyebrowsoffire

LGTM. I had a question about some of the flags though.

engine/src/build/config/compiler/BUILD.gn

…2198)

Roll Flutter from c1ffaa9 to b007899 (43 revisions) flutter/flutter@c1ffaa9...b007899 2025-01-29 tessertaha@gmail.com Fix `Tab` linear and elastic animation blink (flutter/flutter#162315) 2025-01-29 pateltirth454@gmail.com Pass-through `textInputAction` in `DropdownMenu` (flutter/flutter#162309) 2025-01-29 38378650+hgraceb@users.noreply.github.com Fix scrollUntilVisible in WidgetTester (flutter/flutter#159582) 2025-01-29 pateltirth454@gmail.com Pass-through `maxLines` in `DropdownMenu` (flutter/flutter#161903) 2025-01-29 gaganyadav80@gmail.com fix: appbar leading width is not square for custom toolbar height (flutter/flutter#161880) 2025-01-29 chinmaygarde@google.com [DisplayList] Don't call Skia Ganesh methods when its not available. (flutter/flutter#162345) 2025-01-29 reidbaker@google.com Update README.md to include googler post verification steps (flutter/flutter#162272) 2025-01-29 kevmoo@users.noreply.github.com [engine, web] return switch expressions in many places (flutter/flutter#162336) 2025-01-29 reidbaker@google.com Update README.md to not have engine link for android (flutter/flutter#162330) 2025-01-29 bkonyi@google.com Reland "[ Widget Previews ] Add support for detecting previews and generating code (#161911)"" (flutter/flutter#162337) 2025-01-29 34871572+gmackall@users.noreply.github.com Add instructions to download the Gradle wrapper to FGP readme, and add to gitignore (flutter/flutter#162332) 2025-01-29 matanlurey@users.noreply.github.com Fix tests to prepare for `--explicit-package-dependencies` and a bug. (flutter/flutter#162289) 2025-01-29 matanlurey@users.noreply.github.com Add a currently unused `runs_in_merge_queue` property to `Linux analyze`. (flutter/flutter#162335) 2025-01-28 98614782+auto-submit[bot]@users.noreply.github.com Reverts "[ Widget Previews ] Add support for detecting previews and generating code (#161911)" (flutter/flutter#162327) 2025-01-28 58529443+srujzs@users.noreply.github.com Support hot restart for DDC library bundle format (flutter/flutter#162123) 2025-01-28 30870216+gaaclarke@users.noreply.github.com Started adjusting uvs to match pixel snapping. (flutter/flutter#162049) 2025-01-28 mohellebiabdessalem@gmail.com Refactor code inside flutter.groovy (flutter/flutter#160250) 2025-01-28 47866232+chunhtai@users.noreply.github.com Table implements redepth (flutter/flutter#162282) 2025-01-28 bkonyi@google.com [ Widget Previews ] Add support for detecting previews and generating code (flutter/flutter#161911) 2025-01-28 andrewrkolos@gmail.com remove dependency on `Usage` from `Pub` class (flutter/flutter#162279) 2025-01-28 engine-flutter-autoroll@skia.org Roll Packages from 258f6dc to 02c6fef (6 revisions) (flutter/flutter#162313) 2025-01-28 matanlurey@users.noreply.github.com Remove `scenario_app/android` and rename to `ios_scenario_app`. (flutter/flutter#160992) 2025-01-28 matanlurey@users.noreply.github.com Apparently it is illegal to use `stderr` in this project. (flutter/flutter#162294) 2025-01-28 aam@google.com Fix update_engine_version_test in presence of FLUTTER_PREBUILT_ENGINE_VERSION env vars. (flutter/flutter#162270) 2025-01-28 matanlurey@users.noreply.github.com Add missing `properties: ...` and move to presubmit. (flutter/flutter#162170) 2025-01-27 jonahwilliams@google.com [Impeller] make swapchain related external fence/semaphore extensions optional. (flutter/flutter#162205) 2025-01-27 49699333+dependabot[bot]@users.noreply.github.com Bump the all-github-actions group with 2 updates (flutter/flutter#162277) 2025-01-27 chinmaygarde@google.com Don't depend on Dart from FML. (flutter/flutter#162271) 2025-01-27 chinmaygarde@google.com [DisplayList] Move nested canvas enums into their own TU. (flutter/flutter#162037) 2025-01-27 importRyan@gmail.com Avoid iOS text selection crash by returning nil range (flutter/flutter#161996) 2025-01-27 mohellebiabdessalem@gmail.com fix `felt` link to point to flutter repo instead of the engine repo (flutter/flutter#161423) 2025-01-27 matanlurey@users.noreply.github.com Enable the Android Engine OpenGLES/Vulkan suites. (flutter/flutter#162258) 2025-01-27 1961493+harryterkelsen@users.noreply.github.com [canvaskit] Fix debug build for CanvasKit (flutter/flutter#162198) 2025-01-27 engine-flutter-autoroll@skia.org Roll Packages from 3d3ab7b to 258f6dc (19 revisions) (flutter/flutter#162254) 2025-01-25 matanlurey@users.noreply.github.com Pin `customer_testing` to the SHA specified in `tests.version` (flutter/flutter#162048) 2025-01-25 matanlurey@users.noreply.github.com Formalize `update_engine_version.{sh|ps1}`. (flutter/flutter#162118) 2025-01-25 pateltirth454@gmail.com Rename 'SelectionChangedCause.scribble' to 'SelectionChangedCause.stylusHandwriting' (flutter/flutter#161518) 2025-01-25 jacksongardner@google.com Don't install xcode when doing `local_engine` web builds on mac. (flutter/flutter#162164) 2025-01-25 matanlurey@users.noreply.github.com Force Impeller backend for `android_engine_test`, and test both OpenGLES and Vulkan (flutter/flutter#162089) 2025-01-24 jonahwilliams@google.com [Impeller] when a command pool has many unused buffers, reset with release resources flag. (flutter/flutter#162171) 2025-01-24 mdebbar@google.com [web] Remove HTML renderer from framework tests (flutter/flutter#162038) 2025-01-24 jonahwilliams@google.com [Impeller] Skip clip entity replay that cannot impact current clip. (flutter/flutter#162113) 2025-01-24 de.frankenapps@gmail.com Update Android integration test package for newer AGP (flutter/flutter#161856) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: ...

flutteractionsbot · 2025-02-27T22:02:15Z

Failed to create CP due to merge conflicts.
You will need to create the PR manually. See the cherrypick wiki for more info.

Fixes the debug build for CanvasKit. NOTE: We need to build the debug WASM build with `-O1` because building with `-O0` causes Emscripten to produce a binary that is rejected by Chrome for having functions with too many local variables. Building with `-O1` optimizes those locals out. - [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [x] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [x] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [x] I signed the [CLA]. - [x] I listed at least one issue that this PR fixes in the description above. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] I added new tests to check the change I am making, or this PR is [test-exempt]. - [x] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-new channel on [Discord].  [Contributor Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview [Tree Hygiene]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md [test-exempt]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests [Flutter Style Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md [Features we expect every widget to implement]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement [CLA]: https://cla.developers.google.com/ [flutter/tests]: https://github.com/flutter/tests [breaking change policy]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes [Discord]: https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md [Data Driven Fixes]: https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md

…wnload (#164341) ## Stable Cherry Pick Cherry-picks #162198 to stable to fix issue with double-downloading CanvasKit. Fixes #163250 Impacted Users: All Flutter Web users Impact Description: `canvaskit.wasm` (a roughly 5 MB download) is double-downloaded. While some browsers may retrieve the second request from the cache, not all do. Workaround: None Risk: Low (a small change to the BUILD flags for CanvasKit that prevents `canvaskit.wasm` from being downloaded twice) Test Coverage: We don't have a test that checks how many requests there are for `canvaskit.wasm` Validation Steps: Build and run any Flutter Web app and check the network requests to see that `canvaskit.wasm` is only requested once.

…2198)

Roll Flutter from c1ffaa9 to b007899 (43 revisions) flutter/flutter@c1ffaa9...b007899 2025-01-29 tessertaha@gmail.com Fix `Tab` linear and elastic animation blink (flutter/flutter#162315) 2025-01-29 pateltirth454@gmail.com Pass-through `textInputAction` in `DropdownMenu` (flutter/flutter#162309) 2025-01-29 38378650+hgraceb@users.noreply.github.com Fix scrollUntilVisible in WidgetTester (flutter/flutter#159582) 2025-01-29 pateltirth454@gmail.com Pass-through `maxLines` in `DropdownMenu` (flutter/flutter#161903) 2025-01-29 gaganyadav80@gmail.com fix: appbar leading width is not square for custom toolbar height (flutter/flutter#161880) 2025-01-29 chinmaygarde@google.com [DisplayList] Don't call Skia Ganesh methods when its not available. (flutter/flutter#162345) 2025-01-29 reidbaker@google.com Update README.md to include googler post verification steps (flutter/flutter#162272) 2025-01-29 kevmoo@users.noreply.github.com [engine, web] return switch expressions in many places (flutter/flutter#162336) 2025-01-29 reidbaker@google.com Update README.md to not have engine link for android (flutter/flutter#162330) 2025-01-29 bkonyi@google.com Reland "[ Widget Previews ] Add support for detecting previews and generating code (#161911)"" (flutter/flutter#162337) 2025-01-29 34871572+gmackall@users.noreply.github.com Add instructions to download the Gradle wrapper to FGP readme, and add to gitignore (flutter/flutter#162332) 2025-01-29 matanlurey@users.noreply.github.com Fix tests to prepare for `--explicit-package-dependencies` and a bug. (flutter/flutter#162289) 2025-01-29 matanlurey@users.noreply.github.com Add a currently unused `runs_in_merge_queue` property to `Linux analyze`. (flutter/flutter#162335) 2025-01-28 98614782+auto-submit[bot]@users.noreply.github.com Reverts "[ Widget Previews ] Add support for detecting previews and generating code (#161911)" (flutter/flutter#162327) 2025-01-28 58529443+srujzs@users.noreply.github.com Support hot restart for DDC library bundle format (flutter/flutter#162123) 2025-01-28 30870216+gaaclarke@users.noreply.github.com Started adjusting uvs to match pixel snapping. (flutter/flutter#162049) 2025-01-28 mohellebiabdessalem@gmail.com Refactor code inside flutter.groovy (flutter/flutter#160250) 2025-01-28 47866232+chunhtai@users.noreply.github.com Table implements redepth (flutter/flutter#162282) 2025-01-28 bkonyi@google.com [ Widget Previews ] Add support for detecting previews and generating code (flutter/flutter#161911) 2025-01-28 andrewrkolos@gmail.com remove dependency on `Usage` from `Pub` class (flutter/flutter#162279) 2025-01-28 engine-flutter-autoroll@skia.org Roll Packages from 258f6dc to 02c6fef (6 revisions) (flutter/flutter#162313) 2025-01-28 matanlurey@users.noreply.github.com Remove `scenario_app/android` and rename to `ios_scenario_app`. (flutter/flutter#160992) 2025-01-28 matanlurey@users.noreply.github.com Apparently it is illegal to use `stderr` in this project. (flutter/flutter#162294) 2025-01-28 aam@google.com Fix update_engine_version_test in presence of FLUTTER_PREBUILT_ENGINE_VERSION env vars. (flutter/flutter#162270) 2025-01-28 matanlurey@users.noreply.github.com Add missing `properties: ...` and move to presubmit. (flutter/flutter#162170) 2025-01-27 jonahwilliams@google.com [Impeller] make swapchain related external fence/semaphore extensions optional. (flutter/flutter#162205) 2025-01-27 49699333+dependabot[bot]@users.noreply.github.com Bump the all-github-actions group with 2 updates (flutter/flutter#162277) 2025-01-27 chinmaygarde@google.com Don't depend on Dart from FML. (flutter/flutter#162271) 2025-01-27 chinmaygarde@google.com [DisplayList] Move nested canvas enums into their own TU. (flutter/flutter#162037) 2025-01-27 importRyan@gmail.com Avoid iOS text selection crash by returning nil range (flutter/flutter#161996) 2025-01-27 mohellebiabdessalem@gmail.com fix `felt` link to point to flutter repo instead of the engine repo (flutter/flutter#161423) 2025-01-27 matanlurey@users.noreply.github.com Enable the Android Engine OpenGLES/Vulkan suites. (flutter/flutter#162258) 2025-01-27 1961493+harryterkelsen@users.noreply.github.com [canvaskit] Fix debug build for CanvasKit (flutter/flutter#162198) 2025-01-27 engine-flutter-autoroll@skia.org Roll Packages from 3d3ab7b to 258f6dc (19 revisions) (flutter/flutter#162254) 2025-01-25 matanlurey@users.noreply.github.com Pin `customer_testing` to the SHA specified in `tests.version` (flutter/flutter#162048) 2025-01-25 matanlurey@users.noreply.github.com Formalize `update_engine_version.{sh|ps1}`. (flutter/flutter#162118) 2025-01-25 pateltirth454@gmail.com Rename 'SelectionChangedCause.scribble' to 'SelectionChangedCause.stylusHandwriting' (flutter/flutter#161518) 2025-01-25 jacksongardner@google.com Don't install xcode when doing `local_engine` web builds on mac. (flutter/flutter#162164) 2025-01-25 matanlurey@users.noreply.github.com Force Impeller backend for `android_engine_test`, and test both OpenGLES and Vulkan (flutter/flutter#162089) 2025-01-24 jonahwilliams@google.com [Impeller] when a command pool has many unused buffers, reset with release resources flag. (flutter/flutter#162171) 2025-01-24 mdebbar@google.com [web] Remove HTML renderer from framework tests (flutter/flutter#162038) 2025-01-24 jonahwilliams@google.com [Impeller] Skip clip entity replay that cannot impact current clip. (flutter/flutter#162113) 2025-01-24 de.frankenapps@gmail.com Update Android integration test package for newer AGP (flutter/flutter#161856) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: ...

harryterkelsen added 5 commits January 24, 2025 10:37

Try more debug fixes

1a3db42

Undo CanvasKit build args change

ffa2b28

Compile with -O1 on WASM debug builds

6973f7a

Fix debug build

441fadd

SHARED_MEMORY was fixed elsewhere

717ab9e

harryterkelsen requested a review from eyebrowsoffire January 24, 2025 21:39

github-actions bot added the engine flutter/engine related. See also e: labels. label Jan 24, 2025

eyebrowsoffire approved these changes Jan 24, 2025

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engine/src/build/config/compiler/BUILD.gn Outdated Show resolved Hide resolved

Remove unused flags

c4308cf

harryterkelsen added this pull request to the merge queue Jan 27, 2025

Merged via the queue into flutter:master with commit 6b8ead4 Jan 27, 2025
173 checks passed

harryterkelsen deleted the canvaskit-debug-build branch January 27, 2025 18:58

engine-flutter-autoroll mentioned this pull request Jan 28, 2025

Roll Flutter from c1ffaa9d9deb to 9e273d5e6e2e (22 revisions) flutter/packages#8520

Closed

engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Jan 28, 2025

6b8ead4 [canvaskit] Fix debug build for CanvasKit (flutter/flutter#16…

e2957bc

…2198)

engine-flutter-autoroll mentioned this pull request Jan 28, 2025

Roll Flutter from c1ffaa9d9deb to 21f7283f5dfb (23 revisions) flutter/packages#8522

Closed

engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Jan 28, 2025

6b8ead4 [canvaskit] Fix debug build for CanvasKit (flutter/flutter#16…

f068495

…2198)

engine-flutter-autoroll mentioned this pull request Jan 28, 2025

Roll Flutter from c1ffaa9d9deb to a9c50335c736 (24 revisions) flutter/packages#8523

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engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Jan 28, 2025

6b8ead4 [canvaskit] Fix debug build for CanvasKit (flutter/flutter#16…

13000a8

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engine-flutter-autoroll mentioned this pull request Jan 29, 2025

Roll Flutter from c1ffaa9d9deb to b007899d3a7a (43 revisions) flutter/packages#8527

Merged

engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Jan 29, 2025

6b8ead4 [canvaskit] Fix debug build for CanvasKit (flutter/flutter#16…

b196872

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eyebrowsoffire mentioned this pull request Feb 13, 2025

Flutter web @ 3.29 stable double loads canvaskit.wasm when running with JS #163250

Closed

harryterkelsen added the cp: stable cherry pick this pull request to stable release candidate branch label Feb 27, 2025

harryterkelsen mentioned this pull request Feb 27, 2025

[stable] Cherry-pick change to CanvasKit build flags to fix double download #164341

Merged

engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 20, 2025

6b8ead4 [canvaskit] Fix debug build for CanvasKit (flutter/flutter#16…

99a3a59

…2198)

engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 20, 2025

6b8ead4 [canvaskit] Fix debug build for CanvasKit (flutter/flutter#16…

b910295

…2198)

engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request May 21, 2025

6b8ead4 [canvaskit] Fix debug build for CanvasKit (flutter/flutter#16…

76c3280

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[canvaskit] Fix debug build for CanvasKit #162198

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[canvaskit] Fix debug build for CanvasKit #162198

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