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[Impeller] Delete any remaining GL objects during destruction of the ReactorGLES #56361

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jason-simmons
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At shutdown time the ReactorGLES may still be holding handles of GL objects. These objects should be cleaned up when the reactor is deleted.

This leak can be seen by running DlGoldenTest.ShimmerTest, which takes a series of screenshots. Each screenshot creates an AiksContext. Without this change, the textures in the AiksContext's ReactorGLES will be leaked after the AiksContext is destroyed.

…ReactorGLES

At shutdown time the ReactorGLES may still be holding handles of GL
objects.  These objects should be cleaned up when the reactor is deleted.

This leak can be seen by running DlGoldenTest.ShimmerTest, which takes
a series of screenshots.  Each screenshot creates an AiksContext.
Without this change, the textures in the AiksContext's ReactorGLES will
be leaked after the AiksContext is destroyed.
@@ -23,7 +72,13 @@ ReactorGLES::ReactorGLES(std::unique_ptr<ProcTableGLES> gl)
is_valid_ = true;
}

ReactorGLES::~ReactorGLES() = default;
ReactorGLES::~ReactorGLES() {
for (auto& handle : handles_) {
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This needs to be guarded by a CanReactOnCurrentThread. Otherwise, there is no guarantee that the thread can actually perform OpenGL operations. Perhaps there should be a shutdown method that can be explicitly called in addition to being called from the destructor. If there are pending handles and there can be no reactions on the current thread, then we could just log.

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Added a CanReactOnCurrentThread check.

Unfortunately, there does not seem to be an obvious place for the shell to clean up the ReactorGLES on a reactor worker thread during shutdown. The ReactorGLES is not deleted until the PlatformView is deleted on the platform thread in the final phase of shell shutdown.

The shell will be relying on destruction of the EGL context to clean up these objects.

@jason-simmons jason-simmons added the autosubmit Merge PR when tree becomes green via auto submit App label Nov 5, 2024
@auto-submit auto-submit bot merged commit e8c4840 into flutter:main Nov 5, 2024
30 checks passed
engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Nov 5, 2024
engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Nov 5, 2024
auto-submit bot pushed a commit to flutter/flutter that referenced this pull request Nov 6, 2024
…158218)

flutter/engine@e5e06c9...a3741d6

2024-11-05 jason-simmons@users.noreply.github.com Increase timeouts for Linux Fuchsia and Linux Web Framework Tests builders (flutter/engine#56387)
2024-11-05 chris@bracken.jp iOS: Use standard Obj-C cflags for ios_test_flutter (flutter/engine#56384)
2024-11-05 robert.ancell@canonical.com Remove unnecessary method for getting engine switches (command line). (flutter/engine#56265)
2024-11-05 robert.ancell@canonical.com Remove FlScrollingViewDelegate (flutter/engine#56270)
2024-11-05 chris@bracken.jp fml: delete scoped_nsobject.h,mm (flutter/engine#56382)
2024-11-05 skia-flutter-autoroll@skia.org Roll Skia from b3be9cb59fe8 to 82175b411c80 (2 revisions) (flutter/engine#56383)
2024-11-05 jason-simmons@users.noreply.github.com [Impeller] Delete any remaining GL objects during destruction of the ReactorGLES (flutter/engine#56361)
2024-11-05 mdebbar@google.com [web] Switch all fonts to WOFF2 (non-split) (flutter/engine#56035)
2024-11-05 jonahwilliams@google.com [Impeller] exploit content context options' perfect hash function. (flutter/engine#56360)
2024-11-05 skia-flutter-autoroll@skia.org Roll Skia from 7989f782dbf4 to b3be9cb59fe8 (6 revisions) (flutter/engine#56380)
2024-11-05 skia-flutter-autoroll@skia.org Roll Dart SDK from b39c729740eb to 3e840340c412 (1 revision) (flutter/engine#56377)
2024-11-05 jonahwilliams@google.com [Impeller] match Skia's old VMA default block size. (flutter/engine#56368)
2024-11-05 chris@bracken.jp iOS: Refactor ShellTestPlatformViewMetal (flutter/engine#56370)
2024-11-05 skia-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from amgHXcqtplha8LuI_... to z1otZzn3yKuGnu1st... (flutter/engine#56374)

Also rolling transitive DEPS:
  fuchsia/sdk/core/linux-amd64 from amgHXcqtplha to z1otZzn3yKuG

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC jsimmons@google.com,zra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
nick9822 pushed a commit to nick9822/flutter that referenced this pull request Dec 18, 2024
…ReactorGLES (flutter/engine#56361)

At shutdown time the ReactorGLES may still be holding handles of GL objects.  These objects should be cleaned up when the reactor is deleted.

This leak can be seen by running DlGoldenTest.ShimmerTest, which takes a series of screenshots.  Each screenshot creates an AiksContext. Without this change, the textures in the AiksContext's ReactorGLES will be leaked after the AiksContext is destroyed.
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