[Impeller] Terminate the fence waiter but do not reset it during ContextVK shutdown #173085
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…extVK shutdown ContextVK::Shutdown was clearing the context's fence_waiter_. This could cause crashes if a pending task such as image decoding is still holding a reference to the context after ContextVK::Shutdown is called. The image decode task will submit a command buffer through the context, and CommandQueueVK::Submit will get a null pointer deference when it tries to use the fence waiter. This PR changes ContextVK::Shutdown to terminate the fence waiter instead of clearing it. FenceWaiterVK::Terminate will now stop the waiter thread and wait for the thread to exit. This ensures that the fence waiter thread is stopped in ContextVK::Shutdown even if something else is holding a reference to the FenceWaiterVK. Tasks like image decoding will now get an error result instead of a crash when submitting a command buffer after context shutdown.
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This pull request addresses a potential crash during ContextVK shutdown by changing how the fence_waiter_ is handled. Instead of simply resetting the shared_ptr, ContextVK::Shutdown now explicitly calls fence_waiter_->Terminate(). The FenceWaiterVK::Terminate method has been updated to be idempotent and to block until the waiter thread has completed its work and exited. This is achieved by moving the waiter_thread_->join() call from the destructor into Terminate(). The changes are logical, well-implemented, and address the described problem effectively. The accompanying test modifications correctly validate the new blocking behavior of Terminate. The code appears robust and free of race conditions.
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…uring ContextVK shutdown (flutter/flutter#173085)
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Roll Flutter from 871849e4b6bf to beda687d63f2 (34 revisions) flutter/flutter@871849e...beda687 2025-08-04 [email protected] [Impeller] Improvements to the Vulkan pipeline cache data writer (flutter/flutter#173014) 2025-08-04 [email protected] [Impeller] Terminate the fence waiter but do not reset it during ContextVK shutdown (flutter/flutter#173085) 2025-08-04 [email protected] Add the 'windowing' feature flag and use to wrap an implementation for regular windows that always throws (flutter/flutter#172478) 2025-08-04 [email protected] licenses_cpp: reland switch 4 (flutter/flutter#173139) 2025-08-04 [email protected] Roll Skia from 763bba9c33fd to dce9550a1356 (1 revision) (flutter/flutter#173219) 2025-08-04 [email protected] Improve robustness of comment detection when using flutter analyze --suggestions (flutter/flutter#172977) 2025-08-04 [email protected] Make sure that a LicensePage doesn't crash in 0x0 environment (flutter/flutter#172610) 2025-08-04 [email protected] Roll Packages from f0645d8 to 1a72287 (4 revisions) (flutter/flutter#173215) 2025-08-04 [email protected] Roll Skia from edf0f8a5bba6 to 763bba9c33fd (1 revision) (flutter/flutter#173213) 2025-08-04 [email protected] [web] Add Intl.Locale to parse browser languages. (flutter/flutter#172964) 2025-08-04 [email protected] Roll Skia from 439f80973f4a to edf0f8a5bba6 (2 revisions) (flutter/flutter#173204) 2025-08-04 [email protected] Roll Skia from 9d30cc96a3b2 to 439f80973f4a (1 revision) (flutter/flutter#173201) 2025-08-04 [email protected] Roll Skia from 39c70f883c0e to 9d30cc96a3b2 (1 revision) (flutter/flutter#173197) 2025-08-04 [email protected] Roll Skia from 09667386bcba to 39c70f883c0e (1 revision) (flutter/flutter#173194) 2025-08-04 [email protected] fix: get content hash for master on local engine branches (third attempt) (flutter/flutter#173169) 2025-08-03 [email protected] Roll Fuchsia Linux SDK from wZuA8Dqty4scQkZuV... to ufssK8EgJ_9RpLFgu... (flutter/flutter#173190) 2025-08-03 [email protected] Roll Skia from e056e47e118b to 09667386bcba (2 revisions) (flutter/flutter#173185) 2025-08-03 [email protected] fix: tag fuchsia package after uploading (flutter/flutter#173140) 2025-08-02 [email protected] Roll Skia from 7ef888e30a28 to e056e47e118b (1 revision) (flutter/flutter#173170) 2025-08-02 [email protected] Roll Fuchsia Linux SDK from yFLr81lLXmSX7n11D... to wZuA8Dqty4scQkZuV... (flutter/flutter#173166) 2025-08-02 [email protected] Roll Skia from af6d6eb383a6 to 7ef888e30a28 (1 revision) (flutter/flutter#173157) 2025-08-02 [email protected] Add `innerRadius` to `RadioThemeData` (flutter/flutter#173120) 2025-08-02 [email protected] Roll Skia from 81dd6aa516b0 to af6d6eb383a6 (2 revisions) (flutter/flutter#173144) 2025-08-01 98614782+auto-submit[bot]@users.noreply.github.com Reverts "fix: get content hash for master on local engine branches (#173114)" (flutter/flutter#173145) 2025-08-01 [email protected] Roll Dart SDK from 6e1bb159c860 to 3f1307d72d6f (2 revisions) (flutter/flutter#173136) 2025-08-01 [email protected] Roll Skia from 9e2c59634961 to 81dd6aa516b0 (1 revision) (flutter/flutter#173135) 2025-08-01 [email protected] Reformat text.dart's code snippets (flutter/flutter#172976) 2025-08-01 [email protected] experiment with docs properties (flutter/flutter#173124) 2025-08-01 [email protected] fix: get content hash for master on local engine branches (flutter/flutter#173114) 2025-08-01 [email protected] Make sure that a RawAutocomplete doesn't crash in 0x0 environment (flutter/flutter#172812) 2025-08-01 [email protected] Add skia_ports_fontmgr_android_parser_sources (flutter/flutter#172979) 2025-08-01 [email protected] Roll Skia from 49e39cd3cf18 to 9e2c59634961 (10 revisions) (flutter/flutter#173125) 2025-08-01 [email protected] fix: 🐛 Add equality and hashCode implementations to ResizeImage (flutter/flutter#172643) 2025-08-01 [email protected] Roll Fuchsia Linux SDK from xo_bqOoFuBKFmgKxn... to yFLr81lLXmSX7n11D... (flutter/flutter#173117) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-packages Please CC [email protected],[email protected] on the revert to ensure that a human is aware of the problem. To file a bug in Packages: 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 ...
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…extVK shutdown (flutter#173085) ContextVK::Shutdown was clearing the context's fence_waiter_. This could cause crashes if a pending task such as image decoding is still holding a reference to the context after ContextVK::Shutdown is called. The image decode task will submit a command buffer through the context, and CommandQueueVK::Submit will get a null pointer deference when it tries to use the fence waiter. This PR changes ContextVK::Shutdown to terminate the fence waiter instead of clearing it. FenceWaiterVK::Terminate will now stop the waiter thread and wait for the thread to exit. This ensures that the fence waiter thread is stopped in ContextVK::Shutdown even if something else is holding a reference to the FenceWaiterVK. Tasks like image decoding will now get an error result instead of a crash when submitting a command buffer after context shutdown.
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…extVK shutdown (flutter#173085) ContextVK::Shutdown was clearing the context's fence_waiter_. This could cause crashes if a pending task such as image decoding is still holding a reference to the context after ContextVK::Shutdown is called. The image decode task will submit a command buffer through the context, and CommandQueueVK::Submit will get a null pointer deference when it tries to use the fence waiter. This PR changes ContextVK::Shutdown to terminate the fence waiter instead of clearing it. FenceWaiterVK::Terminate will now stop the waiter thread and wait for the thread to exit. This ensures that the fence waiter thread is stopped in ContextVK::Shutdown even if something else is holding a reference to the FenceWaiterVK. Tasks like image decoding will now get an error result instead of a crash when submitting a command buffer after context shutdown.
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…extVK shutdown (flutter#173085) ContextVK::Shutdown was clearing the context's fence_waiter_. This could cause crashes if a pending task such as image decoding is still holding a reference to the context after ContextVK::Shutdown is called. The image decode task will submit a command buffer through the context, and CommandQueueVK::Submit will get a null pointer deference when it tries to use the fence waiter. This PR changes ContextVK::Shutdown to terminate the fence waiter instead of clearing it. FenceWaiterVK::Terminate will now stop the waiter thread and wait for the thread to exit. This ensures that the fence waiter thread is stopped in ContextVK::Shutdown even if something else is holding a reference to the FenceWaiterVK. Tasks like image decoding will now get an error result instead of a crash when submitting a command buffer after context shutdown.
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…extVK shutdown (flutter#173085) ContextVK::Shutdown was clearing the context's fence_waiter_. This could cause crashes if a pending task such as image decoding is still holding a reference to the context after ContextVK::Shutdown is called. The image decode task will submit a command buffer through the context, and CommandQueueVK::Submit will get a null pointer deference when it tries to use the fence waiter. This PR changes ContextVK::Shutdown to terminate the fence waiter instead of clearing it. FenceWaiterVK::Terminate will now stop the waiter thread and wait for the thread to exit. This ensures that the fence waiter thread is stopped in ContextVK::Shutdown even if something else is holding a reference to the FenceWaiterVK. Tasks like image decoding will now get an error result instead of a crash when submitting a command buffer after context shutdown.
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…extVK shutdown (flutter#173085) ContextVK::Shutdown was clearing the context's fence_waiter_. This could cause crashes if a pending task such as image decoding is still holding a reference to the context after ContextVK::Shutdown is called. The image decode task will submit a command buffer through the context, and CommandQueueVK::Submit will get a null pointer deference when it tries to use the fence waiter. This PR changes ContextVK::Shutdown to terminate the fence waiter instead of clearing it. FenceWaiterVK::Terminate will now stop the waiter thread and wait for the thread to exit. This ensures that the fence waiter thread is stopped in ContextVK::Shutdown even if something else is holding a reference to the FenceWaiterVK. Tasks like image decoding will now get an error result instead of a crash when submitting a command buffer after context shutdown.
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Sep 18, 2025
…extVK shutdown (flutter#173085) ContextVK::Shutdown was clearing the context's fence_waiter_. This could cause crashes if a pending task such as image decoding is still holding a reference to the context after ContextVK::Shutdown is called. The image decode task will submit a command buffer through the context, and CommandQueueVK::Submit will get a null pointer deference when it tries to use the fence waiter. This PR changes ContextVK::Shutdown to terminate the fence waiter instead of clearing it. FenceWaiterVK::Terminate will now stop the waiter thread and wait for the thread to exit. This ensures that the fence waiter thread is stopped in ContextVK::Shutdown even if something else is holding a reference to the FenceWaiterVK. Tasks like image decoding will now get an error result instead of a crash when submitting a command buffer after context shutdown.
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Sep 22, 2025
…extVK shutdown (flutter#173085) ContextVK::Shutdown was clearing the context's fence_waiter_. This could cause crashes if a pending task such as image decoding is still holding a reference to the context after ContextVK::Shutdown is called. The image decode task will submit a command buffer through the context, and CommandQueueVK::Submit will get a null pointer deference when it tries to use the fence waiter. This PR changes ContextVK::Shutdown to terminate the fence waiter instead of clearing it. FenceWaiterVK::Terminate will now stop the waiter thread and wait for the thread to exit. This ensures that the fence waiter thread is stopped in ContextVK::Shutdown even if something else is holding a reference to the FenceWaiterVK. Tasks like image decoding will now get an error result instead of a crash when submitting a command buffer after context shutdown.
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…uring ContextVK shutdown (flutter/flutter#173085)
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…extVK shutdown (flutter#173085) ContextVK::Shutdown was clearing the context's fence_waiter_. This could cause crashes if a pending task such as image decoding is still holding a reference to the context after ContextVK::Shutdown is called. The image decode task will submit a command buffer through the context, and CommandQueueVK::Submit will get a null pointer deference when it tries to use the fence waiter. This PR changes ContextVK::Shutdown to terminate the fence waiter instead of clearing it. FenceWaiterVK::Terminate will now stop the waiter thread and wait for the thread to exit. This ensures that the fence waiter thread is stopped in ContextVK::Shutdown even if something else is holding a reference to the FenceWaiterVK. Tasks like image decoding will now get an error result instead of a crash when submitting a command buffer after context shutdown.
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ContextVK::Shutdown was clearing the context's fence_waiter_. This could cause crashes if a pending task such as image decoding is still holding a reference to the context after ContextVK::Shutdown is called.
The image decode task will submit a command buffer through the context, and CommandQueueVK::Submit will get a null pointer deference when it tries to use the fence waiter.
This PR changes ContextVK::Shutdown to terminate the fence waiter instead of clearing it. FenceWaiterVK::Terminate will now stop the waiter thread and wait for the thread to exit.
This ensures that the fence waiter thread is stopped in ContextVK::Shutdown even if something else is holding a reference to the FenceWaiterVK. Tasks like image decoding will now get an error result instead of a crash when submitting a command buffer after context shutdown.